Mercurial > hg > truffle
annotate src/share/vm/prims/jni.cpp @ 973:ad6585fd4087
6830542: Performance: JVM_DefineClass already verified.
Reviewed-by: kamg, phh
| author | acorn |
|---|---|
| date | Fri, 04 Sep 2009 12:53:02 -0400 |
| parents | 715dceaa89b7 |
| children | 08780c8a9f04 |
| rev | line source |
|---|---|
| 0 | 1 /* |
| 579 | 2 * Copyright 1997-2009 Sun Microsystems, Inc. All Rights Reserved. |
| 0 | 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| 4 * | |
| 5 * This code is free software; you can redistribute it and/or modify it | |
| 6 * under the terms of the GNU General Public License version 2 only, as | |
| 7 * published by the Free Software Foundation. | |
| 8 * | |
| 9 * This code is distributed in the hope that it will be useful, but WITHOUT | |
| 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
| 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
| 12 * version 2 for more details (a copy is included in the LICENSE file that | |
| 13 * accompanied this code). | |
| 14 * | |
| 15 * You should have received a copy of the GNU General Public License version | |
| 16 * 2 along with this work; if not, write to the Free Software Foundation, | |
| 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
| 18 * | |
| 19 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, | |
| 20 * CA 95054 USA or visit www.sun.com if you need additional information or | |
| 21 * have any questions. | |
| 22 * | |
| 23 */ | |
| 24 | |
| 25 # include "incls/_precompiled.incl" | |
| 26 # include "incls/_jni.cpp.incl" | |
| 27 | |
| 28 static jint CurrentVersion = JNI_VERSION_1_6; | |
| 29 | |
| 30 | |
| 31 // The DT_RETURN_MARK macros create a scoped object to fire the dtrace | |
| 32 // '-return' probe regardless of the return path is taken out of the function. | |
| 33 // Methods that have multiple return paths use this to avoid having to | |
| 34 // instrument each return path. Methods that use CHECK or THROW must use this | |
| 35 // since those macros can cause an immedate uninstrumented return. | |
| 36 // | |
| 37 // In order to get the return value, a reference to the variable containing | |
| 38 // the return value must be passed to the contructor of the object, and | |
| 39 // the return value must be set before return (since the mark object has | |
| 40 // a reference to it). | |
| 41 // | |
| 42 // Example: | |
| 43 // DT_RETURN_MARK_DECL(SomeFunc, int); | |
| 44 // JNI_ENTRY(int, SomeFunc, ...) | |
| 45 // int return_value = 0; | |
| 46 // DT_RETURN_MARK(SomeFunc, int, (const int&)return_value); | |
| 47 // foo(CHECK_0) | |
| 48 // return_value = 5; | |
| 49 // return return_value; | |
| 50 // JNI_END | |
| 51 #define DT_RETURN_MARK_DECL(name, type) \ | |
| 52 HS_DTRACE_PROBE_DECL1(hotspot_jni, name##__return, type); \ | |
| 53 DTRACE_ONLY( \ | |
| 54 class DTraceReturnProbeMark_##name { \ | |
| 55 public: \ | |
| 56 const type& _ret_ref; \ | |
| 57 DTraceReturnProbeMark_##name(const type& v) : _ret_ref(v) {} \ | |
| 58 ~DTraceReturnProbeMark_##name() { \ | |
| 59 HS_DTRACE_PROBE1(hotspot_jni, name##__return, _ret_ref); \ | |
| 60 } \ | |
| 61 } \ | |
| 62 ) | |
| 63 // Void functions are simpler since there's no return value | |
| 64 #define DT_VOID_RETURN_MARK_DECL(name) \ | |
| 65 HS_DTRACE_PROBE_DECL0(hotspot_jni, name##__return); \ | |
| 66 DTRACE_ONLY( \ | |
| 67 class DTraceReturnProbeMark_##name { \ | |
| 68 public: \ | |
| 69 ~DTraceReturnProbeMark_##name() { \ | |
| 70 HS_DTRACE_PROBE0(hotspot_jni, name##__return); \ | |
| 71 } \ | |
| 72 } \ | |
| 73 ) | |
| 74 | |
| 75 | |
| 76 // Place these macros in the function to mark the return. Non-void | |
| 77 // functions need the type and address of the return value. | |
| 78 #define DT_RETURN_MARK(name, type, ref) \ | |
| 79 DTRACE_ONLY( DTraceReturnProbeMark_##name dtrace_return_mark(ref) ) | |
| 80 #define DT_VOID_RETURN_MARK(name) \ | |
| 81 DTRACE_ONLY( DTraceReturnProbeMark_##name dtrace_return_mark ) | |
| 82 | |
| 83 | |
| 84 // Use these to select distinct code for floating-point vs. non-floating point | |
| 85 // situations. Used from within common macros where we need slightly | |
| 86 // different behavior for Float/Double | |
| 87 #define FP_SELECT_Boolean(intcode, fpcode) intcode | |
| 88 #define FP_SELECT_Byte(intcode, fpcode) intcode | |
| 89 #define FP_SELECT_Char(intcode, fpcode) intcode | |
| 90 #define FP_SELECT_Short(intcode, fpcode) intcode | |
| 91 #define FP_SELECT_Object(intcode, fpcode) intcode | |
| 92 #define FP_SELECT_Int(intcode, fpcode) intcode | |
| 93 #define FP_SELECT_Long(intcode, fpcode) intcode | |
| 94 #define FP_SELECT_Float(intcode, fpcode) fpcode | |
| 95 #define FP_SELECT_Double(intcode, fpcode) fpcode | |
| 96 #define FP_SELECT(TypeName, intcode, fpcode) \ | |
| 97 FP_SELECT_##TypeName(intcode, fpcode) | |
| 98 | |
| 99 #define COMMA , | |
| 100 | |
| 101 // Choose DT_RETURN_MARK macros based on the type: float/double -> void | |
| 102 // (dtrace doesn't do FP yet) | |
| 103 #define DT_RETURN_MARK_DECL_FOR(TypeName, name, type) \ | |
| 104 FP_SELECT(TypeName, \ | |
| 105 DT_RETURN_MARK_DECL(name, type), DT_VOID_RETURN_MARK_DECL(name) ) | |
| 106 #define DT_RETURN_MARK_FOR(TypeName, name, type, ref) \ | |
| 107 FP_SELECT(TypeName, \ | |
| 108 DT_RETURN_MARK(name, type, ref), DT_VOID_RETURN_MARK(name) ) | |
| 109 | |
| 110 | |
| 111 // out-of-line helpers for class jfieldIDWorkaround: | |
| 112 | |
| 113 bool jfieldIDWorkaround::is_valid_jfieldID(klassOop k, jfieldID id) { | |
| 114 if (jfieldIDWorkaround::is_instance_jfieldID(k, id)) { | |
| 115 uintptr_t as_uint = (uintptr_t) id; | |
| 116 intptr_t offset = raw_instance_offset(id); | |
| 117 if (is_checked_jfieldID(id)) { | |
| 118 if (!klass_hash_ok(k, id)) { | |
| 119 return false; | |
| 120 } | |
| 121 } | |
| 122 return instanceKlass::cast(k)->contains_field_offset(offset); | |
| 123 } else { | |
| 124 JNIid* result = (JNIid*) id; | |
| 125 #ifdef ASSERT | |
| 126 return result != NULL && result->is_static_field_id(); | |
| 127 #else | |
| 128 return result != NULL; | |
| 129 #endif | |
| 130 } | |
| 131 } | |
| 132 | |
| 133 | |
| 134 intptr_t jfieldIDWorkaround::encode_klass_hash(klassOop k, intptr_t offset) { | |
| 135 if (offset <= small_offset_mask) { | |
| 136 klassOop field_klass = k; | |
| 137 klassOop super_klass = Klass::cast(field_klass)->super(); | |
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138 // With compressed oops the most super class with nonstatic fields would |
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139 // be the owner of fields embedded in the header. |
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140 while (instanceKlass::cast(super_klass)->has_nonstatic_fields() && |
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141 instanceKlass::cast(super_klass)->contains_field_offset(offset)) { |
| 0 | 142 field_klass = super_klass; // super contains the field also |
| 143 super_klass = Klass::cast(field_klass)->super(); | |
| 144 } | |
| 145 debug_only(No_Safepoint_Verifier nosafepoint;) | |
| 146 uintptr_t klass_hash = field_klass->identity_hash(); | |
| 147 return ((klass_hash & klass_mask) << klass_shift) | checked_mask_in_place; | |
| 148 } else { | |
| 149 #if 0 | |
| 150 #ifndef PRODUCT | |
| 151 { | |
| 152 ResourceMark rm; | |
| 153 warning("VerifyJNIFields: long offset %d in %s", offset, Klass::cast(k)->external_name()); | |
| 154 } | |
| 155 #endif | |
| 156 #endif | |
| 157 return 0; | |
| 158 } | |
| 159 } | |
| 160 | |
| 161 bool jfieldIDWorkaround::klass_hash_ok(klassOop k, jfieldID id) { | |
| 162 uintptr_t as_uint = (uintptr_t) id; | |
| 163 intptr_t klass_hash = (as_uint >> klass_shift) & klass_mask; | |
| 164 do { | |
| 165 debug_only(No_Safepoint_Verifier nosafepoint;) | |
| 166 // Could use a non-blocking query for identity_hash here... | |
| 167 if ((k->identity_hash() & klass_mask) == klass_hash) | |
| 168 return true; | |
| 169 k = Klass::cast(k)->super(); | |
| 170 } while (k != NULL); | |
| 171 return false; | |
| 172 } | |
| 173 | |
| 174 void jfieldIDWorkaround::verify_instance_jfieldID(klassOop k, jfieldID id) { | |
| 175 guarantee(jfieldIDWorkaround::is_instance_jfieldID(k, id), "must be an instance field" ); | |
| 176 uintptr_t as_uint = (uintptr_t) id; | |
| 177 intptr_t offset = raw_instance_offset(id); | |
| 178 if (VerifyJNIFields) { | |
| 179 if (is_checked_jfieldID(id)) { | |
| 180 guarantee(klass_hash_ok(k, id), | |
| 181 "Bug in native code: jfieldID class must match object"); | |
| 182 } else { | |
| 183 #if 0 | |
| 184 #ifndef PRODUCT | |
| 185 if (Verbose) { | |
| 186 ResourceMark rm; | |
| 187 warning("VerifyJNIFields: unverified offset %d for %s", offset, Klass::cast(k)->external_name()); | |
| 188 } | |
| 189 #endif | |
| 190 #endif | |
| 191 } | |
| 192 } | |
| 193 guarantee(instanceKlass::cast(k)->contains_field_offset(offset), | |
| 194 "Bug in native code: jfieldID offset must address interior of object"); | |
| 195 } | |
| 196 | |
| 197 // Pick a reasonable higher bound for local capacity requested | |
| 198 // for EnsureLocalCapacity and PushLocalFrame. We don't want it too | |
| 199 // high because a test (or very unusual application) may try to allocate | |
| 200 // that many handles and run out of swap space. An implementation is | |
| 201 // permitted to allocate more handles than the ensured capacity, so this | |
| 202 // value is set high enough to prevent compatibility problems. | |
| 203 const int MAX_REASONABLE_LOCAL_CAPACITY = 4*K; | |
| 204 | |
| 205 | |
| 206 // Wrapper to trace JNI functions | |
| 207 | |
| 208 #ifdef ASSERT | |
| 209 Histogram* JNIHistogram; | |
| 210 static volatile jint JNIHistogram_lock = 0; | |
| 211 | |
| 212 class JNITraceWrapper : public StackObj { | |
| 213 public: | |
| 214 JNITraceWrapper(const char* format, ...) { | |
| 215 if (TraceJNICalls) { | |
| 216 va_list ap; | |
| 217 va_start(ap, format); | |
| 218 tty->print("JNI "); | |
| 219 tty->vprint_cr(format, ap); | |
| 220 va_end(ap); | |
| 221 } | |
| 222 } | |
| 223 }; | |
| 224 | |
| 225 class JNIHistogramElement : public HistogramElement { | |
| 226 public: | |
| 227 JNIHistogramElement(const char* name); | |
| 228 }; | |
| 229 | |
| 230 JNIHistogramElement::JNIHistogramElement(const char* elementName) { | |
| 231 _name = elementName; | |
| 232 uintx count = 0; | |
| 233 | |
| 234 while (Atomic::cmpxchg(1, &JNIHistogram_lock, 0) != 0) { | |
| 235 while (OrderAccess::load_acquire(&JNIHistogram_lock) != 0) { | |
| 236 count +=1; | |
| 237 if ( (WarnOnStalledSpinLock > 0) | |
| 238 && (count % WarnOnStalledSpinLock == 0)) { | |
| 239 warning("JNIHistogram_lock seems to be stalled"); | |
| 240 } | |
| 241 } | |
| 242 } | |
| 243 | |
| 244 | |
| 245 if(JNIHistogram == NULL) | |
| 246 JNIHistogram = new Histogram("JNI Call Counts",100); | |
| 247 | |
| 248 JNIHistogram->add_element(this); | |
| 249 Atomic::dec(&JNIHistogram_lock); | |
| 250 } | |
| 251 | |
| 252 #define JNICountWrapper(arg) \ | |
| 253 static JNIHistogramElement* e = new JNIHistogramElement(arg); \ | |
| 254 /* There is a MT-race condition in VC++. So we need to make sure that that e has been initialized */ \ | |
| 255 if (e != NULL) e->increment_count() | |
| 256 #define JNIWrapper(arg) JNICountWrapper(arg); JNITraceWrapper(arg) | |
| 257 #else | |
| 258 #define JNIWrapper(arg) | |
| 259 #endif | |
| 260 | |
| 261 | |
| 262 // Implementation of JNI entries | |
| 263 | |
| 264 DT_RETURN_MARK_DECL(DefineClass, jclass); | |
| 265 | |
| 266 JNI_ENTRY(jclass, jni_DefineClass(JNIEnv *env, const char *name, jobject loaderRef, | |
| 267 const jbyte *buf, jsize bufLen)) | |
| 268 JNIWrapper("DefineClass"); | |
| 269 | |
| 270 DTRACE_PROBE5(hotspot_jni, DefineClass__entry, | |
| 271 env, name, loaderRef, buf, bufLen); | |
| 272 jclass cls = NULL; | |
| 273 DT_RETURN_MARK(DefineClass, jclass, (const jclass&)cls); | |
| 274 | |
| 275 // Since exceptions can be thrown, class initialization can take place | |
| 276 // if name is NULL no check for class name in .class stream has to be made. | |
| 277 symbolHandle class_name; | |
| 278 if (name != NULL) { | |
| 279 const int str_len = (int)strlen(name); | |
| 280 if (str_len > symbolOopDesc::max_length()) { | |
| 281 // It's impossible to create this class; the name cannot fit | |
| 282 // into the constant pool. | |
| 283 THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), name); | |
| 284 } | |
| 285 class_name = oopFactory::new_symbol_handle(name, str_len, CHECK_NULL); | |
| 286 } | |
| 287 | |
| 288 ResourceMark rm(THREAD); | |
| 289 ClassFileStream st((u1*) buf, bufLen, NULL); | |
| 290 Handle class_loader (THREAD, JNIHandles::resolve(loaderRef)); | |
| 291 | |
| 292 if (UsePerfData && !class_loader.is_null()) { | |
| 293 // check whether the current caller thread holds the lock or not. | |
| 294 // If not, increment the corresponding counter | |
| 295 if (ObjectSynchronizer:: | |
| 296 query_lock_ownership((JavaThread*)THREAD, class_loader) != | |
| 297 ObjectSynchronizer::owner_self) { | |
| 298 ClassLoader::sync_JNIDefineClassLockFreeCounter()->inc(); | |
| 299 } | |
| 300 } | |
| 301 klassOop k = SystemDictionary::resolve_from_stream(class_name, class_loader, | |
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302 Handle(), &st, true, |
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303 CHECK_NULL); |
| 0 | 304 |
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305 if (TraceClassResolution && k != NULL) { |
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306 trace_class_resolution(k); |
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307 } |
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308 |
| 0 | 309 cls = (jclass)JNIHandles::make_local( |
| 310 env, Klass::cast(k)->java_mirror()); | |
| 311 return cls; | |
| 312 JNI_END | |
| 313 | |
| 314 | |
| 315 | |
| 316 static bool first_time_FindClass = true; | |
| 317 | |
| 318 DT_RETURN_MARK_DECL(FindClass, jclass); | |
| 319 | |
| 320 JNI_ENTRY(jclass, jni_FindClass(JNIEnv *env, const char *name)) | |
| 321 JNIWrapper("FindClass"); | |
| 322 DTRACE_PROBE2(hotspot_jni, FindClass__entry, env, name); | |
| 323 | |
| 324 jclass result = NULL; | |
| 325 DT_RETURN_MARK(FindClass, jclass, (const jclass&)result); | |
| 326 | |
| 327 // Remember if we are the first invocation of jni_FindClass | |
| 328 bool first_time = first_time_FindClass; | |
| 329 first_time_FindClass = false; | |
| 330 | |
| 331 // Sanity check the name: it cannot be null or larger than the maximum size | |
| 332 // name we can fit in the constant pool. | |
| 333 if (name == NULL || (int)strlen(name) > symbolOopDesc::max_length()) { | |
| 334 THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), name); | |
| 335 } | |
| 336 | |
| 337 //%note jni_3 | |
| 338 Handle loader; | |
| 339 Handle protection_domain; | |
| 340 // Find calling class | |
| 341 instanceKlassHandle k (THREAD, thread->security_get_caller_class(0)); | |
| 342 if (k.not_null()) { | |
| 343 loader = Handle(THREAD, k->class_loader()); | |
| 344 // Special handling to make sure JNI_OnLoad and JNI_OnUnload are executed | |
| 345 // in the correct class context. | |
| 346 if (loader.is_null() && | |
| 347 k->name() == vmSymbols::java_lang_ClassLoader_NativeLibrary()) { | |
| 348 JavaValue result(T_OBJECT); | |
| 349 JavaCalls::call_static(&result, k, | |
| 350 vmSymbolHandles::getFromClass_name(), | |
| 351 vmSymbolHandles::void_class_signature(), | |
| 352 thread); | |
| 353 if (HAS_PENDING_EXCEPTION) { | |
| 354 Handle ex(thread, thread->pending_exception()); | |
| 355 CLEAR_PENDING_EXCEPTION; | |
| 356 THROW_HANDLE_0(ex); | |
| 357 } | |
| 358 oop mirror = (oop) result.get_jobject(); | |
| 359 loader = Handle(THREAD, | |
| 360 instanceKlass::cast(java_lang_Class::as_klassOop(mirror))->class_loader()); | |
| 361 protection_domain = Handle(THREAD, | |
| 362 instanceKlass::cast(java_lang_Class::as_klassOop(mirror))->protection_domain()); | |
| 363 } | |
| 364 } else { | |
| 365 // We call ClassLoader.getSystemClassLoader to obtain the system class loader. | |
| 366 loader = Handle(THREAD, SystemDictionary::java_system_loader()); | |
| 367 } | |
| 368 | |
| 369 symbolHandle sym = oopFactory::new_symbol_handle(name, CHECK_NULL); | |
| 370 result = find_class_from_class_loader(env, sym, true, loader, | |
| 371 protection_domain, true, thread); | |
| 372 | |
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373 if (TraceClassResolution && result != NULL) { |
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374 trace_class_resolution(java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(result))); |
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375 } |
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376 |
| 0 | 377 // If we were the first invocation of jni_FindClass, we enable compilation again |
| 378 // rather than just allowing invocation counter to overflow and decay. | |
| 379 // Controlled by flag DelayCompilationDuringStartup. | |
| 380 if (first_time && !CompileTheWorld) | |
| 381 CompilationPolicy::completed_vm_startup(); | |
| 382 | |
| 383 return result; | |
| 384 JNI_END | |
| 385 | |
| 386 DT_RETURN_MARK_DECL(FromReflectedMethod, jmethodID); | |
| 387 | |
| 388 JNI_ENTRY(jmethodID, jni_FromReflectedMethod(JNIEnv *env, jobject method)) | |
| 389 JNIWrapper("FromReflectedMethod"); | |
| 390 DTRACE_PROBE2(hotspot_jni, FromReflectedMethod__entry, env, method); | |
| 391 jmethodID ret = NULL; | |
| 392 DT_RETURN_MARK(FromReflectedMethod, jmethodID, (const jmethodID&)ret); | |
| 393 | |
| 394 // method is a handle to a java.lang.reflect.Method object | |
| 395 oop reflected = JNIHandles::resolve_non_null(method); | |
| 396 oop mirror = NULL; | |
| 397 int slot = 0; | |
| 398 | |
| 399 if (reflected->klass() == SystemDictionary::reflect_constructor_klass()) { | |
| 400 mirror = java_lang_reflect_Constructor::clazz(reflected); | |
| 401 slot = java_lang_reflect_Constructor::slot(reflected); | |
| 402 } else { | |
| 403 assert(reflected->klass() == SystemDictionary::reflect_method_klass(), "wrong type"); | |
| 404 mirror = java_lang_reflect_Method::clazz(reflected); | |
| 405 slot = java_lang_reflect_Method::slot(reflected); | |
| 406 } | |
| 407 klassOop k = java_lang_Class::as_klassOop(mirror); | |
| 408 | |
| 409 KlassHandle k1(THREAD, k); | |
| 410 // Make sure class is initialized before handing id's out to methods | |
| 411 Klass::cast(k1())->initialize(CHECK_NULL); | |
| 412 methodOop m = instanceKlass::cast(k1())->method_with_idnum(slot); | |
| 413 ret = m==NULL? NULL : m->jmethod_id(); // return NULL if reflected method deleted | |
| 414 return ret; | |
| 415 JNI_END | |
| 416 | |
| 417 DT_RETURN_MARK_DECL(FromReflectedField, jfieldID); | |
| 418 | |
| 419 JNI_ENTRY(jfieldID, jni_FromReflectedField(JNIEnv *env, jobject field)) | |
| 420 JNIWrapper("FromReflectedField"); | |
| 421 DTRACE_PROBE2(hotspot_jni, FromReflectedField__entry, env, field); | |
| 422 jfieldID ret = NULL; | |
| 423 DT_RETURN_MARK(FromReflectedField, jfieldID, (const jfieldID&)ret); | |
| 424 | |
| 425 // field is a handle to a java.lang.reflect.Field object | |
| 426 oop reflected = JNIHandles::resolve_non_null(field); | |
| 427 oop mirror = java_lang_reflect_Field::clazz(reflected); | |
| 428 klassOop k = java_lang_Class::as_klassOop(mirror); | |
| 429 int slot = java_lang_reflect_Field::slot(reflected); | |
| 430 int modifiers = java_lang_reflect_Field::modifiers(reflected); | |
| 431 | |
| 432 KlassHandle k1(THREAD, k); | |
| 433 // Make sure class is initialized before handing id's out to fields | |
| 434 Klass::cast(k1())->initialize(CHECK_NULL); | |
| 435 | |
| 436 // First check if this is a static field | |
| 437 if (modifiers & JVM_ACC_STATIC) { | |
| 438 intptr_t offset = instanceKlass::cast(k1())->offset_from_fields( slot ); | |
| 439 JNIid* id = instanceKlass::cast(k1())->jni_id_for(offset); | |
| 440 assert(id != NULL, "corrupt Field object"); | |
| 441 debug_only(id->set_is_static_field_id();) | |
| 442 // A jfieldID for a static field is a JNIid specifying the field holder and the offset within the klassOop | |
| 443 ret = jfieldIDWorkaround::to_static_jfieldID(id); | |
| 444 return ret; | |
| 445 } | |
| 446 | |
| 447 // The slot is the index of the field description in the field-array | |
| 448 // The jfieldID is the offset of the field within the object | |
| 449 // It may also have hash bits for k, if VerifyJNIFields is turned on. | |
| 450 intptr_t offset = instanceKlass::cast(k1())->offset_from_fields( slot ); | |
| 451 assert(instanceKlass::cast(k1())->contains_field_offset(offset), "stay within object"); | |
| 452 ret = jfieldIDWorkaround::to_instance_jfieldID(k1(), offset); | |
| 453 return ret; | |
| 454 JNI_END | |
| 455 | |
| 456 DT_RETURN_MARK_DECL(ToReflectedMethod, jobject); | |
| 457 | |
| 458 JNI_ENTRY(jobject, jni_ToReflectedMethod(JNIEnv *env, jclass cls, jmethodID method_id, jboolean isStatic)) | |
| 459 JNIWrapper("ToReflectedMethod"); | |
| 460 DTRACE_PROBE4(hotspot_jni, ToReflectedMethod__entry, env, cls, method_id, isStatic); | |
| 461 jobject ret = NULL; | |
| 462 DT_RETURN_MARK(ToReflectedMethod, jobject, (const jobject&)ret); | |
| 463 | |
| 464 methodHandle m (THREAD, JNIHandles::resolve_jmethod_id(method_id)); | |
| 465 assert(m->is_static() == (isStatic != 0), "jni_ToReflectedMethod access flags doesn't match"); | |
| 466 oop reflection_method; | |
| 467 if (m->is_initializer()) { | |
| 468 reflection_method = Reflection::new_constructor(m, CHECK_NULL); | |
| 469 } else { | |
| 470 reflection_method = Reflection::new_method(m, UseNewReflection, false, CHECK_NULL); | |
| 471 } | |
| 472 ret = JNIHandles::make_local(env, reflection_method); | |
| 473 return ret; | |
| 474 JNI_END | |
| 475 | |
| 476 DT_RETURN_MARK_DECL(GetSuperclass, jclass); | |
| 477 | |
| 478 JNI_ENTRY(jclass, jni_GetSuperclass(JNIEnv *env, jclass sub)) | |
| 479 JNIWrapper("GetSuperclass"); | |
| 480 DTRACE_PROBE2(hotspot_jni, GetSuperclass__entry, env, sub); | |
| 481 jclass obj = NULL; | |
| 482 DT_RETURN_MARK(GetSuperclass, jclass, (const jclass&)obj); | |
| 483 | |
| 484 oop mirror = JNIHandles::resolve_non_null(sub); | |
| 485 // primitive classes return NULL | |
| 486 if (java_lang_Class::is_primitive(mirror)) return NULL; | |
| 487 | |
| 488 // Rules of Class.getSuperClass as implemented by KLass::java_super: | |
| 489 // arrays return Object | |
| 490 // interfaces return NULL | |
| 491 // proper classes return Klass::super() | |
| 492 klassOop k = java_lang_Class::as_klassOop(mirror); | |
| 493 if (Klass::cast(k)->is_interface()) return NULL; | |
| 494 | |
| 495 // return mirror for superclass | |
| 496 klassOop super = Klass::cast(k)->java_super(); | |
| 497 // super2 is the value computed by the compiler's getSuperClass intrinsic: | |
| 498 debug_only(klassOop super2 = ( Klass::cast(k)->oop_is_javaArray() | |
| 499 ? SystemDictionary::object_klass() | |
| 500 : Klass::cast(k)->super() ) ); | |
| 501 assert(super == super2, | |
| 502 "java_super computation depends on interface, array, other super"); | |
| 503 obj = (super == NULL) ? NULL : (jclass) JNIHandles::make_local(Klass::cast(super)->java_mirror()); | |
| 504 return obj; | |
| 505 JNI_END | |
| 506 | |
| 507 JNI_QUICK_ENTRY(jboolean, jni_IsAssignableFrom(JNIEnv *env, jclass sub, jclass super)) | |
| 508 JNIWrapper("IsSubclassOf"); | |
| 509 DTRACE_PROBE3(hotspot_jni, IsAssignableFrom__entry, env, sub, super); | |
| 510 oop sub_mirror = JNIHandles::resolve_non_null(sub); | |
| 511 oop super_mirror = JNIHandles::resolve_non_null(super); | |
| 512 if (java_lang_Class::is_primitive(sub_mirror) || | |
| 513 java_lang_Class::is_primitive(super_mirror)) { | |
| 514 jboolean ret = (sub_mirror == super_mirror); | |
| 515 DTRACE_PROBE1(hotspot_jni, IsAssignableFrom__return, ret); | |
| 516 return ret; | |
| 517 } | |
| 518 klassOop sub_klass = java_lang_Class::as_klassOop(sub_mirror); | |
| 519 klassOop super_klass = java_lang_Class::as_klassOop(super_mirror); | |
| 520 assert(sub_klass != NULL && super_klass != NULL, "invalid arguments to jni_IsAssignableFrom"); | |
| 521 jboolean ret = Klass::cast(sub_klass)->is_subtype_of(super_klass) ? | |
| 522 JNI_TRUE : JNI_FALSE; | |
| 523 DTRACE_PROBE1(hotspot_jni, IsAssignableFrom__return, ret); | |
| 524 return ret; | |
| 525 JNI_END | |
| 526 | |
| 527 DT_RETURN_MARK_DECL(Throw, jint); | |
| 528 | |
| 529 JNI_ENTRY(jint, jni_Throw(JNIEnv *env, jthrowable obj)) | |
| 530 JNIWrapper("Throw"); | |
| 531 DTRACE_PROBE2(hotspot_jni, Throw__entry, env, obj); | |
| 532 jint ret = JNI_OK; | |
| 533 DT_RETURN_MARK(Throw, jint, (const jint&)ret); | |
| 534 | |
| 535 THROW_OOP_(JNIHandles::resolve(obj), JNI_OK); | |
| 536 ShouldNotReachHere(); | |
| 537 JNI_END | |
| 538 | |
| 539 DT_RETURN_MARK_DECL(ThrowNew, jint); | |
| 540 | |
| 541 JNI_ENTRY(jint, jni_ThrowNew(JNIEnv *env, jclass clazz, const char *message)) | |
| 542 JNIWrapper("ThrowNew"); | |
| 543 DTRACE_PROBE3(hotspot_jni, ThrowNew__entry, env, clazz, message); | |
| 544 jint ret = JNI_OK; | |
| 545 DT_RETURN_MARK(ThrowNew, jint, (const jint&)ret); | |
| 546 | |
| 547 instanceKlass* k = instanceKlass::cast(java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(clazz))); | |
| 548 symbolHandle name = symbolHandle(THREAD, k->name()); | |
| 549 Handle class_loader (THREAD, k->class_loader()); | |
| 550 Handle protection_domain (THREAD, k->protection_domain()); | |
| 551 THROW_MSG_LOADER_(name, (char *)message, class_loader, protection_domain, JNI_OK); | |
| 552 ShouldNotReachHere(); | |
| 553 JNI_END | |
| 554 | |
| 555 | |
| 556 // JNI functions only transform a pending async exception to a synchronous | |
| 557 // exception in ExceptionOccurred and ExceptionCheck calls, since | |
| 558 // delivering an async exception in other places won't change the native | |
| 559 // code's control flow and would be harmful when native code further calls | |
| 560 // JNI functions with a pending exception. Async exception is also checked | |
| 561 // during the call, so ExceptionOccurred/ExceptionCheck won't return | |
| 562 // false but deliver the async exception at the very end during | |
| 563 // state transition. | |
| 564 | |
| 565 static void jni_check_async_exceptions(JavaThread *thread) { | |
| 566 assert(thread == Thread::current(), "must be itself"); | |
| 567 thread->check_and_handle_async_exceptions(); | |
| 568 } | |
| 569 | |
| 570 JNI_ENTRY_NO_PRESERVE(jthrowable, jni_ExceptionOccurred(JNIEnv *env)) | |
| 571 JNIWrapper("ExceptionOccurred"); | |
| 572 DTRACE_PROBE1(hotspot_jni, ExceptionOccurred__entry, env); | |
| 573 jni_check_async_exceptions(thread); | |
| 574 oop exception = thread->pending_exception(); | |
| 575 jthrowable ret = (jthrowable) JNIHandles::make_local(env, exception); | |
| 576 DTRACE_PROBE1(hotspot_jni, ExceptionOccurred__return, ret); | |
| 577 return ret; | |
| 578 JNI_END | |
| 579 | |
| 580 | |
| 581 JNI_ENTRY_NO_PRESERVE(void, jni_ExceptionDescribe(JNIEnv *env)) | |
| 582 JNIWrapper("ExceptionDescribe"); | |
| 583 DTRACE_PROBE1(hotspot_jni, ExceptionDescribe__entry, env); | |
| 584 if (thread->has_pending_exception()) { | |
| 585 Handle ex(thread, thread->pending_exception()); | |
| 586 thread->clear_pending_exception(); | |
| 587 if (ex->is_a(SystemDictionary::threaddeath_klass())) { | |
| 588 // Don't print anything if we are being killed. | |
| 589 } else { | |
| 590 jio_fprintf(defaultStream::error_stream(), "Exception "); | |
| 591 if (thread != NULL && thread->threadObj() != NULL) { | |
| 592 ResourceMark rm(THREAD); | |
| 593 jio_fprintf(defaultStream::error_stream(), | |
| 594 "in thread \"%s\" ", thread->get_thread_name()); | |
| 595 } | |
| 596 if (ex->is_a(SystemDictionary::throwable_klass())) { | |
| 597 JavaValue result(T_VOID); | |
| 598 JavaCalls::call_virtual(&result, | |
| 599 ex, | |
| 600 KlassHandle(THREAD, | |
| 601 SystemDictionary::throwable_klass()), | |
| 602 vmSymbolHandles::printStackTrace_name(), | |
| 603 vmSymbolHandles::void_method_signature(), | |
| 604 THREAD); | |
| 605 // If an exception is thrown in the call it gets thrown away. Not much | |
| 606 // we can do with it. The native code that calls this, does not check | |
| 607 // for the exception - hence, it might still be in the thread when DestroyVM gets | |
| 608 // called, potentially causing a few asserts to trigger - since no pending exception | |
| 609 // is expected. | |
| 610 CLEAR_PENDING_EXCEPTION; | |
| 611 } else { | |
| 612 ResourceMark rm(THREAD); | |
| 613 jio_fprintf(defaultStream::error_stream(), | |
| 614 ". Uncaught exception of type %s.", | |
| 615 Klass::cast(ex->klass())->external_name()); | |
| 616 } | |
| 617 } | |
| 618 } | |
| 619 DTRACE_PROBE(hotspot_jni, ExceptionDescribe__return); | |
| 620 JNI_END | |
| 621 | |
| 622 | |
| 623 JNI_QUICK_ENTRY(void, jni_ExceptionClear(JNIEnv *env)) | |
| 624 JNIWrapper("ExceptionClear"); | |
| 625 DTRACE_PROBE1(hotspot_jni, ExceptionClear__entry, env); | |
| 626 | |
| 627 // The jni code might be using this API to clear java thrown exception. | |
| 628 // So just mark jvmti thread exception state as exception caught. | |
| 629 JvmtiThreadState *state = JavaThread::current()->jvmti_thread_state(); | |
| 630 if (state != NULL && state->is_exception_detected()) { | |
| 631 state->set_exception_caught(); | |
| 632 } | |
| 633 thread->clear_pending_exception(); | |
| 634 DTRACE_PROBE(hotspot_jni, ExceptionClear__return); | |
| 635 JNI_END | |
| 636 | |
| 637 | |
| 638 JNI_ENTRY(void, jni_FatalError(JNIEnv *env, const char *msg)) | |
| 639 JNIWrapper("FatalError"); | |
| 640 DTRACE_PROBE2(hotspot_jni, FatalError__entry, env, msg); | |
| 641 tty->print_cr("FATAL ERROR in native method: %s", msg); | |
| 642 thread->print_stack(); | |
|
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|
643 os::abort(); // Dump core and abort |
| 0 | 644 JNI_END |
| 645 | |
| 646 | |
| 647 JNI_ENTRY(jint, jni_PushLocalFrame(JNIEnv *env, jint capacity)) | |
| 648 JNIWrapper("PushLocalFrame"); | |
| 649 DTRACE_PROBE2(hotspot_jni, PushLocalFrame__entry, env, capacity); | |
| 650 //%note jni_11 | |
| 651 if (capacity < 0 && capacity > MAX_REASONABLE_LOCAL_CAPACITY) { | |
| 652 DTRACE_PROBE1(hotspot_jni, PushLocalFrame__return, JNI_ERR); | |
| 653 return JNI_ERR; | |
| 654 } | |
| 655 JNIHandleBlock* old_handles = thread->active_handles(); | |
| 656 JNIHandleBlock* new_handles = JNIHandleBlock::allocate_block(thread); | |
| 657 assert(new_handles != NULL, "should not be NULL"); | |
| 658 new_handles->set_pop_frame_link(old_handles); | |
| 659 thread->set_active_handles(new_handles); | |
| 660 jint ret = JNI_OK; | |
| 661 DTRACE_PROBE1(hotspot_jni, PushLocalFrame__return, ret); | |
| 662 return ret; | |
| 663 JNI_END | |
| 664 | |
| 665 | |
| 666 JNI_ENTRY(jobject, jni_PopLocalFrame(JNIEnv *env, jobject result)) | |
| 667 JNIWrapper("PopLocalFrame"); | |
| 668 DTRACE_PROBE2(hotspot_jni, PopLocalFrame__entry, env, result); | |
| 669 //%note jni_11 | |
| 670 Handle result_handle(thread, JNIHandles::resolve(result)); | |
| 671 JNIHandleBlock* old_handles = thread->active_handles(); | |
| 672 JNIHandleBlock* new_handles = old_handles->pop_frame_link(); | |
| 673 if (new_handles != NULL) { | |
| 674 // As a sanity check we only release the handle blocks if the pop_frame_link is not NULL. | |
| 675 // This way code will still work if PopLocalFrame is called without a corresponding | |
| 676 // PushLocalFrame call. Note that we set the pop_frame_link to NULL explicitly, otherwise | |
| 677 // the release_block call will release the blocks. | |
| 678 thread->set_active_handles(new_handles); | |
| 679 old_handles->set_pop_frame_link(NULL); // clear link we won't release new_handles below | |
| 680 JNIHandleBlock::release_block(old_handles, thread); // may block | |
| 681 result = JNIHandles::make_local(thread, result_handle()); | |
| 682 } | |
| 683 DTRACE_PROBE1(hotspot_jni, PopLocalFrame__return, result); | |
| 684 return result; | |
| 685 JNI_END | |
| 686 | |
| 687 | |
| 688 JNI_ENTRY(jobject, jni_NewGlobalRef(JNIEnv *env, jobject ref)) | |
| 689 JNIWrapper("NewGlobalRef"); | |
| 690 DTRACE_PROBE2(hotspot_jni, NewGlobalRef__entry, env, ref); | |
| 691 Handle ref_handle(thread, JNIHandles::resolve(ref)); | |
| 692 jobject ret = JNIHandles::make_global(ref_handle); | |
| 693 DTRACE_PROBE1(hotspot_jni, NewGlobalRef__return, ret); | |
| 694 return ret; | |
| 695 JNI_END | |
| 696 | |
| 697 // Must be JNI_ENTRY (with HandleMark) | |
| 698 JNI_ENTRY_NO_PRESERVE(void, jni_DeleteGlobalRef(JNIEnv *env, jobject ref)) | |
| 699 JNIWrapper("DeleteGlobalRef"); | |
| 700 DTRACE_PROBE2(hotspot_jni, DeleteGlobalRef__entry, env, ref); | |
| 701 JNIHandles::destroy_global(ref); | |
| 702 DTRACE_PROBE(hotspot_jni, DeleteGlobalRef__return); | |
| 703 JNI_END | |
| 704 | |
| 705 JNI_QUICK_ENTRY(void, jni_DeleteLocalRef(JNIEnv *env, jobject obj)) | |
| 706 JNIWrapper("DeleteLocalRef"); | |
| 707 DTRACE_PROBE2(hotspot_jni, DeleteLocalRef__entry, env, obj); | |
| 708 JNIHandles::destroy_local(obj); | |
| 709 DTRACE_PROBE(hotspot_jni, DeleteLocalRef__return); | |
| 710 JNI_END | |
| 711 | |
| 712 JNI_QUICK_ENTRY(jboolean, jni_IsSameObject(JNIEnv *env, jobject r1, jobject r2)) | |
| 713 JNIWrapper("IsSameObject"); | |
| 714 DTRACE_PROBE3(hotspot_jni, IsSameObject__entry, env, r1, r2); | |
| 715 oop a = JNIHandles::resolve(r1); | |
| 716 oop b = JNIHandles::resolve(r2); | |
| 717 jboolean ret = (a == b) ? JNI_TRUE : JNI_FALSE; | |
| 718 DTRACE_PROBE1(hotspot_jni, IsSameObject__return, ret); | |
| 719 return ret; | |
| 720 JNI_END | |
| 721 | |
| 722 | |
| 723 JNI_ENTRY(jobject, jni_NewLocalRef(JNIEnv *env, jobject ref)) | |
| 724 JNIWrapper("NewLocalRef"); | |
| 725 DTRACE_PROBE2(hotspot_jni, NewLocalRef__entry, env, ref); | |
| 726 jobject ret = JNIHandles::make_local(env, JNIHandles::resolve(ref)); | |
| 727 DTRACE_PROBE1(hotspot_jni, NewLocalRef__return, ret); | |
| 728 return ret; | |
| 729 JNI_END | |
| 730 | |
| 731 JNI_LEAF(jint, jni_EnsureLocalCapacity(JNIEnv *env, jint capacity)) | |
| 732 JNIWrapper("EnsureLocalCapacity"); | |
| 733 DTRACE_PROBE2(hotspot_jni, EnsureLocalCapacity__entry, env, capacity); | |
| 734 jint ret; | |
| 735 if (capacity >= 0 && capacity <= MAX_REASONABLE_LOCAL_CAPACITY) { | |
| 736 ret = JNI_OK; | |
| 737 } else { | |
| 738 ret = JNI_ERR; | |
| 739 } | |
| 740 DTRACE_PROBE1(hotspot_jni, EnsureLocalCapacity__return, ret); | |
| 741 return ret; | |
| 742 JNI_END | |
| 743 | |
| 744 // Return the Handle Type | |
| 745 JNI_LEAF(jobjectRefType, jni_GetObjectRefType(JNIEnv *env, jobject obj)) | |
| 746 JNIWrapper("GetObjectRefType"); | |
| 747 DTRACE_PROBE2(hotspot_jni, GetObjectRefType__entry, env, obj); | |
| 748 jobjectRefType ret; | |
| 749 if (JNIHandles::is_local_handle(thread, obj) || | |
| 750 JNIHandles::is_frame_handle(thread, obj)) | |
| 751 ret = JNILocalRefType; | |
| 752 else if (JNIHandles::is_global_handle(obj)) | |
| 753 ret = JNIGlobalRefType; | |
| 754 else if (JNIHandles::is_weak_global_handle(obj)) | |
| 755 ret = JNIWeakGlobalRefType; | |
| 756 else | |
| 757 ret = JNIInvalidRefType; | |
| 758 DTRACE_PROBE1(hotspot_jni, GetObjectRefType__return, ret); | |
| 759 return ret; | |
| 760 JNI_END | |
| 761 | |
| 762 | |
| 763 class JNI_ArgumentPusher : public SignatureIterator { | |
| 764 protected: | |
| 765 JavaCallArguments* _arguments; | |
| 766 | |
| 767 virtual void get_bool () = 0; | |
| 768 virtual void get_char () = 0; | |
| 769 virtual void get_short () = 0; | |
| 770 virtual void get_byte () = 0; | |
| 771 virtual void get_int () = 0; | |
| 772 virtual void get_long () = 0; | |
| 773 virtual void get_float () = 0; | |
| 774 virtual void get_double () = 0; | |
| 775 virtual void get_object () = 0; | |
| 776 | |
| 777 JNI_ArgumentPusher(Thread *thread, symbolOop signature) | |
| 778 : SignatureIterator(thread, signature) { | |
| 779 this->_return_type = T_ILLEGAL; | |
| 780 _arguments = NULL; | |
| 781 } | |
| 782 | |
| 783 public: | |
| 784 virtual void iterate( uint64_t fingerprint ) = 0; | |
| 785 | |
| 786 void set_java_argument_object(JavaCallArguments *arguments) { _arguments = arguments; } | |
| 787 | |
| 788 inline void do_bool() { if (!is_return_type()) get_bool(); } | |
| 789 inline void do_char() { if (!is_return_type()) get_char(); } | |
| 790 inline void do_short() { if (!is_return_type()) get_short(); } | |
| 791 inline void do_byte() { if (!is_return_type()) get_byte(); } | |
| 792 inline void do_int() { if (!is_return_type()) get_int(); } | |
| 793 inline void do_long() { if (!is_return_type()) get_long(); } | |
| 794 inline void do_float() { if (!is_return_type()) get_float(); } | |
| 795 inline void do_double() { if (!is_return_type()) get_double(); } | |
| 796 inline void do_object(int begin, int end) { if (!is_return_type()) get_object(); } | |
| 797 inline void do_array(int begin, int end) { if (!is_return_type()) get_object(); } // do_array uses get_object -- there is no get_array | |
| 798 inline void do_void() { } | |
| 799 | |
| 800 JavaCallArguments* arguments() { return _arguments; } | |
| 801 void push_receiver(Handle h) { _arguments->push_oop(h); } | |
| 802 }; | |
| 803 | |
| 804 | |
| 805 class JNI_ArgumentPusherVaArg : public JNI_ArgumentPusher { | |
| 806 protected: | |
| 807 va_list _ap; | |
| 808 | |
| 809 inline void get_bool() { _arguments->push_int(va_arg(_ap, jint)); } // bool is coerced to int when using va_arg | |
| 810 inline void get_char() { _arguments->push_int(va_arg(_ap, jint)); } // char is coerced to int when using va_arg | |
| 811 inline void get_short() { _arguments->push_int(va_arg(_ap, jint)); } // short is coerced to int when using va_arg | |
| 812 inline void get_byte() { _arguments->push_int(va_arg(_ap, jint)); } // byte is coerced to int when using va_arg | |
| 813 inline void get_int() { _arguments->push_int(va_arg(_ap, jint)); } | |
| 814 | |
| 815 // each of these paths is exercized by the various jck Call[Static,Nonvirtual,][Void,Int,..]Method[A,V,] tests | |
| 816 | |
| 817 inline void get_long() { _arguments->push_long(va_arg(_ap, jlong)); } | |
| 818 inline void get_float() { _arguments->push_float((jfloat)va_arg(_ap, jdouble)); } // float is coerced to double w/ va_arg | |
| 819 inline void get_double() { _arguments->push_double(va_arg(_ap, jdouble)); } | |
| 820 inline void get_object() { jobject l = va_arg(_ap, jobject); | |
| 821 _arguments->push_oop(Handle((oop *)l, false)); } | |
| 822 | |
| 823 inline void set_ap(va_list rap) { | |
| 824 #ifdef va_copy | |
| 825 va_copy(_ap, rap); | |
| 826 #elif defined (__va_copy) | |
| 827 __va_copy(_ap, rap); | |
| 828 #else | |
| 829 _ap = rap; | |
| 830 #endif | |
| 831 } | |
| 832 | |
| 833 public: | |
| 834 JNI_ArgumentPusherVaArg(Thread *thread, symbolOop signature, va_list rap) | |
| 835 : JNI_ArgumentPusher(thread, signature) { | |
| 836 set_ap(rap); | |
| 837 } | |
| 838 JNI_ArgumentPusherVaArg(Thread *thread, jmethodID method_id, va_list rap) | |
| 839 : JNI_ArgumentPusher(thread, JNIHandles::resolve_jmethod_id(method_id)->signature()) { | |
| 840 set_ap(rap); | |
| 841 } | |
| 842 | |
| 843 // Optimized path if we have the bitvector form of signature | |
| 844 void iterate( uint64_t fingerprint ) { | |
| 845 if ( fingerprint == UCONST64(-1) ) SignatureIterator::iterate();// Must be too many arguments | |
| 846 else { | |
| 847 _return_type = (BasicType)((fingerprint >> static_feature_size) & | |
| 848 result_feature_mask); | |
| 849 | |
| 850 assert(fingerprint, "Fingerprint should not be 0"); | |
| 851 fingerprint = fingerprint >> (static_feature_size + result_feature_size); | |
| 852 while ( 1 ) { | |
| 853 switch ( fingerprint & parameter_feature_mask ) { | |
| 854 case bool_parm: | |
| 855 case char_parm: | |
| 856 case short_parm: | |
| 857 case byte_parm: | |
| 858 case int_parm: | |
| 859 get_int(); | |
| 860 break; | |
| 861 case obj_parm: | |
| 862 get_object(); | |
| 863 break; | |
| 864 case long_parm: | |
| 865 get_long(); | |
| 866 break; | |
| 867 case float_parm: | |
| 868 get_float(); | |
| 869 break; | |
| 870 case double_parm: | |
| 871 get_double(); | |
| 872 break; | |
| 873 case done_parm: | |
| 874 return; | |
| 875 break; | |
| 876 default: | |
| 877 ShouldNotReachHere(); | |
| 878 break; | |
| 879 } | |
| 880 fingerprint >>= parameter_feature_size; | |
| 881 } | |
| 882 } | |
| 883 } | |
| 884 }; | |
| 885 | |
| 886 | |
| 887 class JNI_ArgumentPusherArray : public JNI_ArgumentPusher { | |
| 888 protected: | |
| 889 const jvalue *_ap; | |
| 890 | |
| 891 inline void get_bool() { _arguments->push_int((jint)(_ap++)->z); } | |
| 892 inline void get_char() { _arguments->push_int((jint)(_ap++)->c); } | |
| 893 inline void get_short() { _arguments->push_int((jint)(_ap++)->s); } | |
| 894 inline void get_byte() { _arguments->push_int((jint)(_ap++)->b); } | |
| 895 inline void get_int() { _arguments->push_int((jint)(_ap++)->i); } | |
| 896 | |
| 897 inline void get_long() { _arguments->push_long((_ap++)->j); } | |
| 898 inline void get_float() { _arguments->push_float((_ap++)->f); } | |
| 899 inline void get_double() { _arguments->push_double((_ap++)->d);} | |
| 900 inline void get_object() { _arguments->push_oop(Handle((oop *)(_ap++)->l, false)); } | |
| 901 | |
| 902 inline void set_ap(const jvalue *rap) { _ap = rap; } | |
| 903 | |
| 904 public: | |
| 905 JNI_ArgumentPusherArray(Thread *thread, symbolOop signature, const jvalue *rap) | |
| 906 : JNI_ArgumentPusher(thread, signature) { | |
| 907 set_ap(rap); | |
| 908 } | |
| 909 JNI_ArgumentPusherArray(Thread *thread, jmethodID method_id, const jvalue *rap) | |
| 910 : JNI_ArgumentPusher(thread, JNIHandles::resolve_jmethod_id(method_id)->signature()) { | |
| 911 set_ap(rap); | |
| 912 } | |
| 913 | |
| 914 // Optimized path if we have the bitvector form of signature | |
| 915 void iterate( uint64_t fingerprint ) { | |
| 916 if ( fingerprint == UCONST64(-1) ) SignatureIterator::iterate(); // Must be too many arguments | |
| 917 else { | |
| 918 _return_type = (BasicType)((fingerprint >> static_feature_size) & | |
| 919 result_feature_mask); | |
| 920 assert(fingerprint, "Fingerprint should not be 0"); | |
| 921 fingerprint = fingerprint >> (static_feature_size + result_feature_size); | |
| 922 while ( 1 ) { | |
| 923 switch ( fingerprint & parameter_feature_mask ) { | |
| 924 case bool_parm: | |
| 925 get_bool(); | |
| 926 break; | |
| 927 case char_parm: | |
| 928 get_char(); | |
| 929 break; | |
| 930 case short_parm: | |
| 931 get_short(); | |
| 932 break; | |
| 933 case byte_parm: | |
| 934 get_byte(); | |
| 935 break; | |
| 936 case int_parm: | |
| 937 get_int(); | |
| 938 break; | |
| 939 case obj_parm: | |
| 940 get_object(); | |
| 941 break; | |
| 942 case long_parm: | |
| 943 get_long(); | |
| 944 break; | |
| 945 case float_parm: | |
| 946 get_float(); | |
| 947 break; | |
| 948 case double_parm: | |
| 949 get_double(); | |
| 950 break; | |
| 951 case done_parm: | |
| 952 return; | |
| 953 break; | |
| 954 default: | |
| 955 ShouldNotReachHere(); | |
| 956 break; | |
| 957 } | |
| 958 fingerprint >>= parameter_feature_size; | |
| 959 } | |
| 960 } | |
| 961 } | |
| 962 }; | |
| 963 | |
| 964 | |
| 965 enum JNICallType { | |
| 966 JNI_STATIC, | |
| 967 JNI_VIRTUAL, | |
| 968 JNI_NONVIRTUAL | |
| 969 }; | |
| 970 | |
| 971 static methodHandle jni_resolve_interface_call(Handle recv, methodHandle method, TRAPS) { | |
| 972 assert(!method.is_null() , "method should not be null"); | |
| 973 | |
| 974 KlassHandle recv_klass; // Default to NULL (use of ?: can confuse gcc) | |
| 975 if (recv.not_null()) recv_klass = KlassHandle(THREAD, recv->klass()); | |
| 976 KlassHandle spec_klass (THREAD, method->method_holder()); | |
| 977 symbolHandle name (THREAD, method->name()); | |
| 978 symbolHandle signature (THREAD, method->signature()); | |
| 979 CallInfo info; | |
| 980 LinkResolver::resolve_interface_call(info, recv, recv_klass, spec_klass, name, signature, KlassHandle(), false, true, CHECK_(methodHandle())); | |
| 981 return info.selected_method(); | |
| 982 } | |
| 983 | |
| 984 static methodHandle jni_resolve_virtual_call(Handle recv, methodHandle method, TRAPS) { | |
| 985 assert(!method.is_null() , "method should not be null"); | |
| 986 | |
| 987 KlassHandle recv_klass; // Default to NULL (use of ?: can confuse gcc) | |
| 988 if (recv.not_null()) recv_klass = KlassHandle(THREAD, recv->klass()); | |
| 989 KlassHandle spec_klass (THREAD, method->method_holder()); | |
| 990 symbolHandle name (THREAD, method->name()); | |
| 991 symbolHandle signature (THREAD, method->signature()); | |
| 992 CallInfo info; | |
| 993 LinkResolver::resolve_virtual_call(info, recv, recv_klass, spec_klass, name, signature, KlassHandle(), false, true, CHECK_(methodHandle())); | |
| 994 return info.selected_method(); | |
| 995 } | |
| 996 | |
| 997 | |
| 998 | |
| 999 static void jni_invoke_static(JNIEnv *env, JavaValue* result, jobject receiver, JNICallType call_type, jmethodID method_id, JNI_ArgumentPusher *args, TRAPS) { | |
| 1000 methodHandle method(THREAD, JNIHandles::resolve_jmethod_id(method_id)); | |
| 1001 | |
| 1002 // Create object to hold arguments for the JavaCall, and associate it with | |
| 1003 // the jni parser | |
| 1004 ResourceMark rm(THREAD); | |
| 1005 int number_of_parameters = method->size_of_parameters(); | |
| 1006 JavaCallArguments java_args(number_of_parameters); | |
| 1007 args->set_java_argument_object(&java_args); | |
| 1008 | |
| 1009 assert(method->is_static(), "method should be static"); | |
| 1010 | |
| 1011 // Fill out JavaCallArguments object | |
| 1012 args->iterate( Fingerprinter(THREAD, method).fingerprint() ); | |
| 1013 // Initialize result type | |
| 1014 result->set_type(args->get_ret_type()); | |
| 1015 | |
| 1016 // Invoke the method. Result is returned as oop. | |
| 1017 JavaCalls::call(result, method, &java_args, CHECK); | |
| 1018 | |
| 1019 // Convert result | |
| 1020 if (result->get_type() == T_OBJECT || result->get_type() == T_ARRAY) { | |
| 1021 result->set_jobject(JNIHandles::make_local(env, (oop) result->get_jobject())); | |
| 1022 } | |
| 1023 } | |
| 1024 | |
| 1025 | |
| 1026 static void jni_invoke_nonstatic(JNIEnv *env, JavaValue* result, jobject receiver, JNICallType call_type, jmethodID method_id, JNI_ArgumentPusher *args, TRAPS) { | |
| 1027 oop recv = JNIHandles::resolve(receiver); | |
| 1028 if (recv == NULL) { | |
| 1029 THROW(vmSymbols::java_lang_NullPointerException()); | |
| 1030 } | |
| 1031 Handle h_recv(THREAD, recv); | |
| 1032 | |
| 1033 int number_of_parameters; | |
| 1034 methodOop selected_method; | |
| 1035 { | |
| 1036 methodOop m = JNIHandles::resolve_jmethod_id(method_id); | |
| 1037 number_of_parameters = m->size_of_parameters(); | |
| 1038 klassOop holder = m->method_holder(); | |
| 1039 if (!(Klass::cast(holder))->is_interface()) { | |
| 1040 // non-interface call -- for that little speed boost, don't handlize | |
| 1041 debug_only(No_Safepoint_Verifier nosafepoint;) | |
| 1042 if (call_type == JNI_VIRTUAL) { | |
| 1043 // jni_GetMethodID makes sure class is linked and initialized | |
| 1044 // so m should have a valid vtable index. | |
| 1045 int vtbl_index = m->vtable_index(); | |
| 1046 if (vtbl_index != methodOopDesc::nonvirtual_vtable_index) { | |
| 1047 klassOop k = h_recv->klass(); | |
| 1048 // k might be an arrayKlassOop but all vtables start at | |
| 1049 // the same place. The cast is to avoid virtual call and assertion. | |
| 1050 instanceKlass *ik = (instanceKlass*)k->klass_part(); | |
| 1051 selected_method = ik->method_at_vtable(vtbl_index); | |
| 1052 } else { | |
| 1053 // final method | |
| 1054 selected_method = m; | |
| 1055 } | |
| 1056 } else { | |
| 1057 // JNI_NONVIRTUAL call | |
| 1058 selected_method = m; | |
| 1059 } | |
| 1060 } else { | |
| 1061 // interface call | |
| 1062 KlassHandle h_holder(THREAD, holder); | |
| 1063 | |
| 1064 int itbl_index = m->cached_itable_index(); | |
| 1065 if (itbl_index == -1) { | |
| 1066 itbl_index = klassItable::compute_itable_index(m); | |
| 1067 m->set_cached_itable_index(itbl_index); | |
| 1068 // the above may have grabbed a lock, 'm' and anything non-handlized can't be used again | |
| 1069 } | |
| 1070 klassOop k = h_recv->klass(); | |
| 1071 selected_method = instanceKlass::cast(k)->method_at_itable(h_holder(), itbl_index, CHECK); | |
| 1072 } | |
| 1073 } | |
| 1074 | |
| 1075 methodHandle method(THREAD, selected_method); | |
| 1076 | |
| 1077 // Create object to hold arguments for the JavaCall, and associate it with | |
| 1078 // the jni parser | |
| 1079 ResourceMark rm(THREAD); | |
| 1080 JavaCallArguments java_args(number_of_parameters); | |
| 1081 args->set_java_argument_object(&java_args); | |
| 1082 | |
| 1083 // handle arguments | |
| 1084 assert(!method->is_static(), "method should not be static"); | |
| 1085 args->push_receiver(h_recv); // Push jobject handle | |
| 1086 | |
| 1087 // Fill out JavaCallArguments object | |
| 1088 args->iterate( Fingerprinter(THREAD, method).fingerprint() ); | |
| 1089 // Initialize result type | |
| 1090 result->set_type(args->get_ret_type()); | |
| 1091 | |
| 1092 // Invoke the method. Result is returned as oop. | |
| 1093 JavaCalls::call(result, method, &java_args, CHECK); | |
| 1094 | |
| 1095 // Convert result | |
| 1096 if (result->get_type() == T_OBJECT || result->get_type() == T_ARRAY) { | |
| 1097 result->set_jobject(JNIHandles::make_local(env, (oop) result->get_jobject())); | |
| 1098 } | |
| 1099 } | |
| 1100 | |
| 1101 | |
| 1102 static instanceOop alloc_object(jclass clazz, TRAPS) { | |
| 1103 KlassHandle k(THREAD, java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(clazz))); | |
| 1104 Klass::cast(k())->check_valid_for_instantiation(false, CHECK_NULL); | |
| 1105 instanceKlass::cast(k())->initialize(CHECK_NULL); | |
| 1106 instanceOop ih = instanceKlass::cast(k())->allocate_instance(THREAD); | |
| 1107 return ih; | |
| 1108 } | |
| 1109 | |
| 1110 DT_RETURN_MARK_DECL(AllocObject, jobject); | |
| 1111 | |
| 1112 JNI_ENTRY(jobject, jni_AllocObject(JNIEnv *env, jclass clazz)) | |
| 1113 JNIWrapper("AllocObject"); | |
| 1114 | |
| 1115 DTRACE_PROBE2(hotspot_jni, AllocObject__entry, env, clazz); | |
| 1116 jobject ret = NULL; | |
| 1117 DT_RETURN_MARK(AllocObject, jobject, (const jobject&)ret); | |
| 1118 | |
| 1119 instanceOop i = alloc_object(clazz, CHECK_NULL); | |
| 1120 ret = JNIHandles::make_local(env, i); | |
| 1121 return ret; | |
| 1122 JNI_END | |
| 1123 | |
| 1124 DT_RETURN_MARK_DECL(NewObjectA, jobject); | |
| 1125 | |
| 1126 JNI_ENTRY(jobject, jni_NewObjectA(JNIEnv *env, jclass clazz, jmethodID methodID, const jvalue *args)) | |
| 1127 JNIWrapper("NewObjectA"); | |
| 1128 DTRACE_PROBE3(hotspot_jni, NewObjectA__entry, env, clazz, methodID); | |
| 1129 jobject obj = NULL; | |
| 1130 DT_RETURN_MARK(NewObjectA, jobject, (const jobject)obj); | |
| 1131 | |
| 1132 instanceOop i = alloc_object(clazz, CHECK_NULL); | |
| 1133 obj = JNIHandles::make_local(env, i); | |
| 1134 JavaValue jvalue(T_VOID); | |
| 1135 JNI_ArgumentPusherArray ap(THREAD, methodID, args); | |
| 1136 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_NULL); | |
| 1137 return obj; | |
| 1138 JNI_END | |
| 1139 | |
| 1140 DT_RETURN_MARK_DECL(NewObjectV, jobject); | |
| 1141 | |
| 1142 JNI_ENTRY(jobject, jni_NewObjectV(JNIEnv *env, jclass clazz, jmethodID methodID, va_list args)) | |
| 1143 JNIWrapper("NewObjectV"); | |
| 1144 DTRACE_PROBE3(hotspot_jni, NewObjectV__entry, env, clazz, methodID); | |
| 1145 jobject obj = NULL; | |
| 1146 DT_RETURN_MARK(NewObjectV, jobject, (const jobject&)obj); | |
| 1147 | |
| 1148 instanceOop i = alloc_object(clazz, CHECK_NULL); | |
| 1149 obj = JNIHandles::make_local(env, i); | |
| 1150 JavaValue jvalue(T_VOID); | |
| 1151 JNI_ArgumentPusherVaArg ap(THREAD, methodID, args); | |
| 1152 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_NULL); | |
| 1153 return obj; | |
| 1154 JNI_END | |
| 1155 | |
| 1156 DT_RETURN_MARK_DECL(NewObject, jobject); | |
| 1157 | |
| 1158 JNI_ENTRY(jobject, jni_NewObject(JNIEnv *env, jclass clazz, jmethodID methodID, ...)) | |
| 1159 JNIWrapper("NewObject"); | |
| 1160 DTRACE_PROBE3(hotspot_jni, NewObject__entry, env, clazz, methodID); | |
| 1161 jobject obj = NULL; | |
| 1162 DT_RETURN_MARK(NewObject, jobject, (const jobject&)obj); | |
| 1163 | |
| 1164 instanceOop i = alloc_object(clazz, CHECK_NULL); | |
| 1165 obj = JNIHandles::make_local(env, i); | |
| 1166 va_list args; | |
| 1167 va_start(args, methodID); | |
| 1168 JavaValue jvalue(T_VOID); | |
| 1169 JNI_ArgumentPusherVaArg ap(THREAD, methodID, args); | |
| 1170 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_NULL); | |
| 1171 va_end(args); | |
| 1172 return obj; | |
| 1173 JNI_END | |
| 1174 | |
| 1175 | |
| 1176 JNI_ENTRY(jclass, jni_GetObjectClass(JNIEnv *env, jobject obj)) | |
| 1177 JNIWrapper("GetObjectClass"); | |
| 1178 DTRACE_PROBE2(hotspot_jni, GetObjectClass__entry, env, obj); | |
| 1179 klassOop k = JNIHandles::resolve_non_null(obj)->klass(); | |
| 1180 jclass ret = | |
| 1181 (jclass) JNIHandles::make_local(env, Klass::cast(k)->java_mirror()); | |
| 1182 DTRACE_PROBE1(hotspot_jni, GetObjectClass__return, ret); | |
| 1183 return ret; | |
| 1184 JNI_END | |
| 1185 | |
| 1186 JNI_QUICK_ENTRY(jboolean, jni_IsInstanceOf(JNIEnv *env, jobject obj, jclass clazz)) | |
| 1187 JNIWrapper("IsInstanceOf"); | |
| 1188 DTRACE_PROBE3(hotspot_jni, IsInstanceOf__entry, env, obj, clazz); | |
| 1189 jboolean ret = JNI_TRUE; | |
| 1190 if (obj != NULL) { | |
| 1191 ret = JNI_FALSE; | |
| 1192 klassOop k = java_lang_Class::as_klassOop( | |
| 1193 JNIHandles::resolve_non_null(clazz)); | |
| 1194 if (k != NULL) { | |
| 1195 ret = JNIHandles::resolve_non_null(obj)->is_a(k) ? JNI_TRUE : JNI_FALSE; | |
| 1196 } | |
| 1197 } | |
| 1198 DTRACE_PROBE1(hotspot_jni, IsInstanceOf__return, ret); | |
| 1199 return ret; | |
| 1200 JNI_END | |
| 1201 | |
| 1202 | |
| 1203 static jmethodID get_method_id(JNIEnv *env, jclass clazz, const char *name_str, | |
| 1204 const char *sig, bool is_static, TRAPS) { | |
| 1205 // %%%% This code should probably just call into a method in the LinkResolver | |
| 1206 // | |
| 1207 // The class should have been loaded (we have an instance of the class | |
| 1208 // passed in) so the method and signature should already be in the symbol | |
| 1209 // table. If they're not there, the method doesn't exist. | |
| 1210 symbolHandle signature = | |
| 1211 symbolHandle(THREAD, SymbolTable::probe(sig, (int)strlen(sig))); | |
| 1212 symbolHandle name; | |
| 1213 if (name_str == NULL) { | |
| 1214 name = vmSymbolHandles::object_initializer_name(); | |
| 1215 } else { | |
| 1216 name = symbolHandle(THREAD, | |
| 1217 SymbolTable::probe(name_str, (int)strlen(name_str))); | |
| 1218 } | |
| 1219 if (name.is_null() || signature.is_null()) { | |
| 1220 THROW_MSG_0(vmSymbols::java_lang_NoSuchMethodError(), name_str); | |
| 1221 } | |
| 1222 | |
| 1223 // Throw a NoSuchMethodError exception if we have an instance of a | |
| 1224 // primitive java.lang.Class | |
| 1225 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(clazz))) { | |
| 1226 THROW_MSG_0(vmSymbols::java_lang_NoSuchMethodError(), name_str); | |
| 1227 } | |
| 1228 | |
| 1229 KlassHandle klass(THREAD, | |
| 1230 java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(clazz))); | |
| 1231 | |
| 1232 // Make sure class is linked and initialized before handing id's out to | |
| 1233 // methodOops. | |
| 1234 Klass::cast(klass())->initialize(CHECK_NULL); | |
| 1235 | |
| 1236 methodOop m; | |
| 1237 if (name() == vmSymbols::object_initializer_name() || | |
| 1238 name() == vmSymbols::class_initializer_name()) { | |
| 1239 // Never search superclasses for constructors | |
| 1240 if (klass->oop_is_instance()) { | |
| 1241 m = instanceKlass::cast(klass())->find_method(name(), signature()); | |
| 1242 } else { | |
| 1243 m = NULL; | |
| 1244 } | |
| 1245 } else { | |
| 1246 m = klass->lookup_method(name(), signature()); | |
| 1247 // Look up interfaces | |
| 1248 if (m == NULL && klass->oop_is_instance()) { | |
| 1249 m = instanceKlass::cast(klass())->lookup_method_in_all_interfaces(name(), | |
| 1250 signature()); | |
| 1251 } | |
| 1252 } | |
| 1253 if (m == NULL || (m->is_static() != is_static)) { | |
| 1254 THROW_MSG_0(vmSymbols::java_lang_NoSuchMethodError(), name_str); | |
| 1255 } | |
| 1256 return m->jmethod_id(); | |
| 1257 } | |
| 1258 | |
| 1259 | |
| 1260 JNI_ENTRY(jmethodID, jni_GetMethodID(JNIEnv *env, jclass clazz, | |
| 1261 const char *name, const char *sig)) | |
| 1262 JNIWrapper("GetMethodID"); | |
| 1263 DTRACE_PROBE4(hotspot_jni, GetMethodID__entry, env, clazz, name, sig); | |
| 1264 jmethodID ret = get_method_id(env, clazz, name, sig, false, thread); | |
| 1265 DTRACE_PROBE1(hotspot_jni, GetMethodID__return, ret); | |
| 1266 return ret; | |
| 1267 JNI_END | |
| 1268 | |
| 1269 | |
| 1270 JNI_ENTRY(jmethodID, jni_GetStaticMethodID(JNIEnv *env, jclass clazz, | |
| 1271 const char *name, const char *sig)) | |
| 1272 JNIWrapper("GetStaticMethodID"); | |
| 1273 DTRACE_PROBE4(hotspot_jni, GetStaticMethodID__entry, env, clazz, name, sig); | |
| 1274 jmethodID ret = get_method_id(env, clazz, name, sig, true, thread); | |
| 1275 DTRACE_PROBE1(hotspot_jni, GetStaticMethodID__return, ret); | |
| 1276 return ret; | |
| 1277 JNI_END | |
| 1278 | |
| 1279 | |
| 1280 | |
| 1281 // | |
| 1282 // Calling Methods | |
| 1283 // | |
| 1284 | |
| 1285 | |
| 1286 #define DEFINE_CALLMETHOD(ResultType, Result, Tag) \ | |
| 1287 \ | |
| 1288 DT_RETURN_MARK_DECL_FOR(Result, Call##Result##Method, ResultType);\ | |
| 1289 DT_RETURN_MARK_DECL_FOR(Result, Call##Result##MethodV, ResultType);\ | |
| 1290 DT_RETURN_MARK_DECL_FOR(Result, Call##Result##MethodA, ResultType);\ | |
| 1291 \ | |
| 1292 JNI_ENTRY(ResultType, \ | |
| 1293 jni_Call##Result##Method(JNIEnv *env, jobject obj, jmethodID methodID, ...)) \ | |
| 1294 JNIWrapper("Call" XSTR(Result) "Method"); \ | |
| 1295 \ | |
| 1296 DTRACE_PROBE3(hotspot_jni, Call##Result##Method__entry, env, obj, methodID);\ | |
| 1297 ResultType ret = 0;\ | |
| 1298 DT_RETURN_MARK_FOR(Result, Call##Result##Method, ResultType, \ | |
| 1299 (const ResultType&)ret);\ | |
| 1300 \ | |
| 1301 va_list args; \ | |
| 1302 va_start(args, methodID); \ | |
| 1303 JavaValue jvalue(Tag); \ | |
| 1304 JNI_ArgumentPusherVaArg ap(THREAD, methodID, args); \ | |
| 1305 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK_0); \ | |
| 1306 va_end(args); \ | |
| 1307 ret = jvalue.get_##ResultType(); \ | |
| 1308 return ret;\ | |
| 1309 JNI_END \ | |
| 1310 \ | |
| 1311 \ | |
| 1312 JNI_ENTRY(ResultType, \ | |
| 1313 jni_Call##Result##MethodV(JNIEnv *env, jobject obj, jmethodID methodID, va_list args)) \ | |
| 1314 JNIWrapper("Call" XSTR(Result) "MethodV"); \ | |
| 1315 \ | |
| 1316 DTRACE_PROBE3(hotspot_jni, Call##Result##MethodV__entry, env, obj, methodID);\ | |
| 1317 ResultType ret = 0;\ | |
| 1318 DT_RETURN_MARK_FOR(Result, Call##Result##MethodV, ResultType, \ | |
| 1319 (const ResultType&)ret);\ | |
| 1320 \ | |
| 1321 JavaValue jvalue(Tag); \ | |
| 1322 JNI_ArgumentPusherVaArg ap(THREAD, methodID, args); \ | |
| 1323 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK_0); \ | |
| 1324 ret = jvalue.get_##ResultType(); \ | |
| 1325 return ret;\ | |
| 1326 JNI_END \ | |
| 1327 \ | |
| 1328 \ | |
| 1329 JNI_ENTRY(ResultType, \ | |
| 1330 jni_Call##Result##MethodA(JNIEnv *env, jobject obj, jmethodID methodID, const jvalue *args)) \ | |
| 1331 JNIWrapper("Call" XSTR(Result) "MethodA"); \ | |
| 1332 DTRACE_PROBE3(hotspot_jni, Call##Result##MethodA__entry, env, obj, methodID);\ | |
| 1333 ResultType ret = 0;\ | |
| 1334 DT_RETURN_MARK_FOR(Result, Call##Result##MethodA, ResultType, \ | |
| 1335 (const ResultType&)ret);\ | |
| 1336 \ | |
| 1337 JavaValue jvalue(Tag); \ | |
| 1338 JNI_ArgumentPusherArray ap(THREAD, methodID, args); \ | |
| 1339 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK_0); \ | |
| 1340 ret = jvalue.get_##ResultType(); \ | |
| 1341 return ret;\ | |
| 1342 JNI_END | |
| 1343 | |
| 1344 // the runtime type of subword integral basic types is integer | |
| 1345 DEFINE_CALLMETHOD(jboolean, Boolean, T_BOOLEAN) | |
| 1346 DEFINE_CALLMETHOD(jbyte, Byte, T_BYTE) | |
| 1347 DEFINE_CALLMETHOD(jchar, Char, T_CHAR) | |
| 1348 DEFINE_CALLMETHOD(jshort, Short, T_SHORT) | |
| 1349 | |
| 1350 DEFINE_CALLMETHOD(jobject, Object, T_OBJECT) | |
| 1351 DEFINE_CALLMETHOD(jint, Int, T_INT) | |
| 1352 DEFINE_CALLMETHOD(jlong, Long, T_LONG) | |
| 1353 DEFINE_CALLMETHOD(jfloat, Float, T_FLOAT) | |
| 1354 DEFINE_CALLMETHOD(jdouble, Double, T_DOUBLE) | |
| 1355 | |
| 1356 DT_VOID_RETURN_MARK_DECL(CallVoidMethod); | |
| 1357 DT_VOID_RETURN_MARK_DECL(CallVoidMethodV); | |
| 1358 DT_VOID_RETURN_MARK_DECL(CallVoidMethodA); | |
| 1359 | |
| 1360 JNI_ENTRY(void, jni_CallVoidMethod(JNIEnv *env, jobject obj, jmethodID methodID, ...)) | |
| 1361 JNIWrapper("CallVoidMethod"); | |
| 1362 DTRACE_PROBE3(hotspot_jni, CallVoidMethod__entry, env, obj, methodID); | |
| 1363 DT_VOID_RETURN_MARK(CallVoidMethod); | |
| 1364 | |
| 1365 va_list args; | |
| 1366 va_start(args, methodID); | |
| 1367 JavaValue jvalue(T_VOID); | |
| 1368 JNI_ArgumentPusherVaArg ap(THREAD, methodID, args); | |
| 1369 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK); | |
| 1370 va_end(args); | |
| 1371 JNI_END | |
| 1372 | |
| 1373 | |
| 1374 JNI_ENTRY(void, jni_CallVoidMethodV(JNIEnv *env, jobject obj, jmethodID methodID, va_list args)) | |
| 1375 JNIWrapper("CallVoidMethodV"); | |
| 1376 DTRACE_PROBE3(hotspot_jni, CallVoidMethodV__entry, env, obj, methodID); | |
| 1377 DT_VOID_RETURN_MARK(CallVoidMethodV); | |
| 1378 | |
| 1379 JavaValue jvalue(T_VOID); | |
| 1380 JNI_ArgumentPusherVaArg ap(THREAD, methodID, args); | |
| 1381 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK); | |
| 1382 JNI_END | |
| 1383 | |
| 1384 | |
| 1385 JNI_ENTRY(void, jni_CallVoidMethodA(JNIEnv *env, jobject obj, jmethodID methodID, const jvalue *args)) | |
| 1386 JNIWrapper("CallVoidMethodA"); | |
| 1387 DTRACE_PROBE3(hotspot_jni, CallVoidMethodA__entry, env, obj, methodID); | |
| 1388 DT_VOID_RETURN_MARK(CallVoidMethodA); | |
| 1389 | |
| 1390 JavaValue jvalue(T_VOID); | |
| 1391 JNI_ArgumentPusherArray ap(THREAD, methodID, args); | |
| 1392 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK); | |
| 1393 JNI_END | |
| 1394 | |
| 1395 | |
| 1396 #define DEFINE_CALLNONVIRTUALMETHOD(ResultType, Result, Tag) \ | |
| 1397 \ | |
| 1398 DT_RETURN_MARK_DECL_FOR(Result, CallNonvirtual##Result##Method, ResultType);\ | |
| 1399 DT_RETURN_MARK_DECL_FOR(Result, CallNonvirtual##Result##MethodV, ResultType);\ | |
| 1400 DT_RETURN_MARK_DECL_FOR(Result, CallNonvirtual##Result##MethodA, ResultType);\ | |
| 1401 \ | |
| 1402 JNI_ENTRY(ResultType, \ | |
| 1403 jni_CallNonvirtual##Result##Method(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, ...)) \ | |
| 1404 JNIWrapper("CallNonvitual" XSTR(Result) "Method"); \ | |
| 1405 \ | |
| 1406 DTRACE_PROBE4(hotspot_jni, CallNonvirtual##Result##Method__entry, env, obj, cls, methodID);\ | |
| 1407 ResultType ret;\ | |
| 1408 DT_RETURN_MARK_FOR(Result, CallNonvirtual##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(THREAD, methodID, args); \ | |
| 1415 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_0); \ | |
| 1416 va_end(args); \ | |
| 1417 ret = jvalue.get_##ResultType(); \ | |
| 1418 return ret;\ | |
| 1419 JNI_END \ | |
| 1420 \ | |
| 1421 JNI_ENTRY(ResultType, \ | |
| 1422 jni_CallNonvirtual##Result##MethodV(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, va_list args)) \ | |
| 1423 JNIWrapper("CallNonvitual" XSTR(Result) "#MethodV"); \ | |
| 1424 DTRACE_PROBE4(hotspot_jni, CallNonvirtual##Result##MethodV__entry, env, obj, cls, methodID);\ | |
| 1425 ResultType ret;\ | |
| 1426 DT_RETURN_MARK_FOR(Result, CallNonvirtual##Result##MethodV, ResultType, \ | |
| 1427 (const ResultType&)ret);\ | |
| 1428 \ | |
| 1429 JavaValue jvalue(Tag); \ | |
| 1430 JNI_ArgumentPusherVaArg ap(THREAD, methodID, args); \ | |
| 1431 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_0); \ | |
| 1432 ret = jvalue.get_##ResultType(); \ | |
| 1433 return ret;\ | |
| 1434 JNI_END \ | |
| 1435 \ | |
| 1436 JNI_ENTRY(ResultType, \ | |
| 1437 jni_CallNonvirtual##Result##MethodA(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, const jvalue *args)) \ | |
| 1438 JNIWrapper("CallNonvitual" XSTR(Result) "MethodA"); \ | |
| 1439 DTRACE_PROBE4(hotspot_jni, CallNonvirtual##Result##MethodA__entry, env, obj, cls, methodID);\ | |
| 1440 ResultType ret;\ | |
| 1441 DT_RETURN_MARK_FOR(Result, CallNonvirtual##Result##MethodA, ResultType, \ | |
| 1442 (const ResultType&)ret);\ | |
| 1443 \ | |
| 1444 JavaValue jvalue(Tag); \ | |
| 1445 JNI_ArgumentPusherArray ap(THREAD, methodID, args); \ | |
| 1446 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_0); \ | |
| 1447 ret = jvalue.get_##ResultType(); \ | |
| 1448 return ret;\ | |
| 1449 JNI_END | |
| 1450 | |
| 1451 // the runtime type of subword integral basic types is integer | |
| 1452 DEFINE_CALLNONVIRTUALMETHOD(jboolean, Boolean, T_BOOLEAN) | |
| 1453 DEFINE_CALLNONVIRTUALMETHOD(jbyte, Byte, T_BYTE) | |
| 1454 DEFINE_CALLNONVIRTUALMETHOD(jchar, Char, T_CHAR) | |
| 1455 DEFINE_CALLNONVIRTUALMETHOD(jshort, Short, T_SHORT) | |
| 1456 | |
| 1457 DEFINE_CALLNONVIRTUALMETHOD(jobject, Object, T_OBJECT) | |
| 1458 DEFINE_CALLNONVIRTUALMETHOD(jint, Int, T_INT) | |
| 1459 DEFINE_CALLNONVIRTUALMETHOD(jlong, Long, T_LONG) | |
| 1460 DEFINE_CALLNONVIRTUALMETHOD(jfloat, Float, T_FLOAT) | |
| 1461 DEFINE_CALLNONVIRTUALMETHOD(jdouble, Double, T_DOUBLE) | |
| 1462 | |
| 1463 | |
| 1464 DT_VOID_RETURN_MARK_DECL(CallNonvirtualVoidMethod); | |
| 1465 DT_VOID_RETURN_MARK_DECL(CallNonvirtualVoidMethodV); | |
| 1466 DT_VOID_RETURN_MARK_DECL(CallNonvirtualVoidMethodA); | |
| 1467 | |
| 1468 JNI_ENTRY(void, jni_CallNonvirtualVoidMethod(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, ...)) | |
| 1469 JNIWrapper("CallNonvirtualVoidMethod"); | |
| 1470 | |
| 1471 DTRACE_PROBE4(hotspot_jni, CallNonvirtualVoidMethod__entry, | |
| 1472 env, obj, cls, methodID); | |
| 1473 DT_VOID_RETURN_MARK(CallNonvirtualVoidMethod); | |
| 1474 | |
| 1475 va_list args; | |
| 1476 va_start(args, methodID); | |
| 1477 JavaValue jvalue(T_VOID); | |
| 1478 JNI_ArgumentPusherVaArg ap(THREAD, methodID, args); | |
| 1479 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK); | |
| 1480 va_end(args); | |
| 1481 JNI_END | |
| 1482 | |
| 1483 | |
| 1484 JNI_ENTRY(void, jni_CallNonvirtualVoidMethodV(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, va_list args)) | |
| 1485 JNIWrapper("CallNonvirtualVoidMethodV"); | |
| 1486 | |
| 1487 DTRACE_PROBE4(hotspot_jni, CallNonvirtualVoidMethodV__entry, | |
| 1488 env, obj, cls, methodID); | |
| 1489 DT_VOID_RETURN_MARK(CallNonvirtualVoidMethodV); | |
| 1490 | |
| 1491 JavaValue jvalue(T_VOID); | |
| 1492 JNI_ArgumentPusherVaArg ap(THREAD, methodID, args); | |
| 1493 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK); | |
| 1494 JNI_END | |
| 1495 | |
| 1496 | |
| 1497 JNI_ENTRY(void, jni_CallNonvirtualVoidMethodA(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, const jvalue *args)) | |
| 1498 JNIWrapper("CallNonvirtualVoidMethodA"); | |
| 1499 DTRACE_PROBE4(hotspot_jni, CallNonvirtualVoidMethodA__entry, | |
| 1500 env, obj, cls, methodID); | |
| 1501 DT_VOID_RETURN_MARK(CallNonvirtualVoidMethodA); | |
| 1502 JavaValue jvalue(T_VOID); | |
| 1503 JNI_ArgumentPusherArray ap(THREAD, methodID, args); | |
| 1504 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK); | |
| 1505 JNI_END | |
| 1506 | |
| 1507 | |
| 1508 #define DEFINE_CALLSTATICMETHOD(ResultType, Result, Tag) \ | |
| 1509 \ | |
| 1510 DT_RETURN_MARK_DECL_FOR(Result, CallStatic##Result##Method, ResultType);\ | |
| 1511 DT_RETURN_MARK_DECL_FOR(Result, CallStatic##Result##MethodV, ResultType);\ | |
| 1512 DT_RETURN_MARK_DECL_FOR(Result, CallStatic##Result##MethodA, ResultType);\ | |
| 1513 \ | |
| 1514 JNI_ENTRY(ResultType, \ | |
| 1515 jni_CallStatic##Result##Method(JNIEnv *env, jclass cls, jmethodID methodID, ...)) \ | |
| 1516 JNIWrapper("CallStatic" XSTR(Result) "Method"); \ | |
| 1517 \ | |
| 1518 DTRACE_PROBE3(hotspot_jni, CallStatic##Result##Method__entry, env, cls, methodID);\ | |
| 1519 ResultType ret = 0;\ | |
| 1520 DT_RETURN_MARK_FOR(Result, CallStatic##Result##Method, ResultType, \ | |
| 1521 (const ResultType&)ret);\ | |
| 1522 \ | |
| 1523 va_list args; \ | |
| 1524 va_start(args, methodID); \ | |
| 1525 JavaValue jvalue(Tag); \ | |
| 1526 JNI_ArgumentPusherVaArg ap(THREAD, methodID, args); \ | |
| 1527 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK_0); \ | |
| 1528 va_end(args); \ | |
| 1529 ret = jvalue.get_##ResultType(); \ | |
| 1530 return ret;\ | |
| 1531 JNI_END \ | |
| 1532 \ | |
| 1533 JNI_ENTRY(ResultType, \ | |
| 1534 jni_CallStatic##Result##MethodV(JNIEnv *env, jclass cls, jmethodID methodID, va_list args)) \ | |
| 1535 JNIWrapper("CallStatic" XSTR(Result) "MethodV"); \ | |
| 1536 DTRACE_PROBE3(hotspot_jni, CallStatic##Result##MethodV__entry, env, cls, methodID);\ | |
| 1537 ResultType ret = 0;\ | |
| 1538 DT_RETURN_MARK_FOR(Result, CallStatic##Result##MethodV, ResultType, \ | |
| 1539 (const ResultType&)ret);\ | |
| 1540 \ | |
| 1541 JavaValue jvalue(Tag); \ | |
| 1542 JNI_ArgumentPusherVaArg ap(THREAD, methodID, args); \ | |
| 1543 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK_0); \ | |
| 1544 ret = jvalue.get_##ResultType(); \ | |
| 1545 return ret;\ | |
| 1546 JNI_END \ | |
| 1547 \ | |
| 1548 JNI_ENTRY(ResultType, \ | |
| 1549 jni_CallStatic##Result##MethodA(JNIEnv *env, jclass cls, jmethodID methodID, const jvalue *args)) \ | |
| 1550 JNIWrapper("CallStatic" XSTR(Result) "MethodA"); \ | |
| 1551 DTRACE_PROBE3(hotspot_jni, CallStatic##Result##MethodA__entry, env, cls, methodID);\ | |
| 1552 ResultType ret = 0;\ | |
| 1553 DT_RETURN_MARK_FOR(Result, CallStatic##Result##MethodA, ResultType, \ | |
| 1554 (const ResultType&)ret);\ | |
| 1555 \ | |
| 1556 JavaValue jvalue(Tag); \ | |
| 1557 JNI_ArgumentPusherArray ap(THREAD, methodID, args); \ | |
| 1558 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK_0); \ | |
| 1559 ret = jvalue.get_##ResultType(); \ | |
| 1560 return ret;\ | |
| 1561 JNI_END | |
| 1562 | |
| 1563 // the runtime type of subword integral basic types is integer | |
| 1564 DEFINE_CALLSTATICMETHOD(jboolean, Boolean, T_BOOLEAN) | |
| 1565 DEFINE_CALLSTATICMETHOD(jbyte, Byte, T_BYTE) | |
| 1566 DEFINE_CALLSTATICMETHOD(jchar, Char, T_CHAR) | |
| 1567 DEFINE_CALLSTATICMETHOD(jshort, Short, T_SHORT) | |
| 1568 | |
| 1569 DEFINE_CALLSTATICMETHOD(jobject, Object, T_OBJECT) | |
| 1570 DEFINE_CALLSTATICMETHOD(jint, Int, T_INT) | |
| 1571 DEFINE_CALLSTATICMETHOD(jlong, Long, T_LONG) | |
| 1572 DEFINE_CALLSTATICMETHOD(jfloat, Float, T_FLOAT) | |
| 1573 DEFINE_CALLSTATICMETHOD(jdouble, Double, T_DOUBLE) | |
| 1574 | |
| 1575 | |
| 1576 DT_VOID_RETURN_MARK_DECL(CallStaticVoidMethod); | |
| 1577 DT_VOID_RETURN_MARK_DECL(CallStaticVoidMethodV); | |
| 1578 DT_VOID_RETURN_MARK_DECL(CallStaticVoidMethodA); | |
| 1579 | |
| 1580 JNI_ENTRY(void, jni_CallStaticVoidMethod(JNIEnv *env, jclass cls, jmethodID methodID, ...)) | |
| 1581 JNIWrapper("CallStaticVoidMethod"); | |
| 1582 DTRACE_PROBE3(hotspot_jni, CallStaticVoidMethod__entry, env, cls, methodID); | |
| 1583 DT_VOID_RETURN_MARK(CallStaticVoidMethod); | |
| 1584 | |
| 1585 va_list args; | |
| 1586 va_start(args, methodID); | |
| 1587 JavaValue jvalue(T_VOID); | |
| 1588 JNI_ArgumentPusherVaArg ap(THREAD, methodID, args); | |
| 1589 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK); | |
| 1590 va_end(args); | |
| 1591 JNI_END | |
| 1592 | |
| 1593 | |
| 1594 JNI_ENTRY(void, jni_CallStaticVoidMethodV(JNIEnv *env, jclass cls, jmethodID methodID, va_list args)) | |
| 1595 JNIWrapper("CallStaticVoidMethodV"); | |
| 1596 DTRACE_PROBE3(hotspot_jni, CallStaticVoidMethodV__entry, env, cls, methodID); | |
| 1597 DT_VOID_RETURN_MARK(CallStaticVoidMethodV); | |
| 1598 | |
| 1599 JavaValue jvalue(T_VOID); | |
| 1600 JNI_ArgumentPusherVaArg ap(THREAD, methodID, args); | |
| 1601 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK); | |
| 1602 JNI_END | |
| 1603 | |
| 1604 | |
| 1605 JNI_ENTRY(void, jni_CallStaticVoidMethodA(JNIEnv *env, jclass cls, jmethodID methodID, const jvalue *args)) | |
| 1606 JNIWrapper("CallStaticVoidMethodA"); | |
| 1607 DTRACE_PROBE3(hotspot_jni, CallStaticVoidMethodA__entry, env, cls, methodID); | |
| 1608 DT_VOID_RETURN_MARK(CallStaticVoidMethodA); | |
| 1609 | |
| 1610 JavaValue jvalue(T_VOID); | |
| 1611 JNI_ArgumentPusherArray ap(THREAD, methodID, args); | |
| 1612 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK); | |
| 1613 JNI_END | |
| 1614 | |
| 1615 | |
| 1616 // | |
| 1617 // Accessing Fields | |
| 1618 // | |
| 1619 | |
| 1620 | |
| 1621 DT_RETURN_MARK_DECL(GetFieldID, jfieldID); | |
| 1622 | |
| 1623 JNI_ENTRY(jfieldID, jni_GetFieldID(JNIEnv *env, jclass clazz, | |
| 1624 const char *name, const char *sig)) | |
| 1625 JNIWrapper("GetFieldID"); | |
| 1626 DTRACE_PROBE4(hotspot_jni, GetFieldID__entry, env, clazz, name, sig); | |
| 1627 jfieldID ret = 0; | |
| 1628 DT_RETURN_MARK(GetFieldID, jfieldID, (const jfieldID&)ret); | |
| 1629 | |
| 1630 // The class should have been loaded (we have an instance of the class | |
| 1631 // passed in) so the field and signature should already be in the symbol | |
| 1632 // table. If they're not there, the field doesn't exist. | |
| 1633 symbolHandle fieldname = | |
| 1634 symbolHandle(THREAD, SymbolTable::probe(name, (int)strlen(name))); | |
| 1635 symbolHandle signame = | |
| 1636 symbolHandle(THREAD, SymbolTable::probe(sig, (int)strlen(sig))); | |
| 1637 if (fieldname.is_null() || signame.is_null()) { | |
| 1638 THROW_MSG_0(vmSymbols::java_lang_NoSuchFieldError(), (char*) name); | |
| 1639 } | |
| 1640 KlassHandle k(THREAD, | |
| 1641 java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(clazz))); | |
| 1642 // Make sure class is initialized before handing id's out to fields | |
| 1643 Klass::cast(k())->initialize(CHECK_NULL); | |
| 1644 | |
| 1645 fieldDescriptor fd; | |
| 1646 if (!Klass::cast(k())->oop_is_instance() || | |
| 1647 !instanceKlass::cast(k())->find_field(fieldname(), signame(), false, &fd)) { | |
| 1648 THROW_MSG_0(vmSymbols::java_lang_NoSuchFieldError(), (char*) name); | |
| 1649 } | |
| 1650 | |
| 1651 // A jfieldID for a non-static field is simply the offset of the field within the instanceOop | |
| 1652 // It may also have hash bits for k, if VerifyJNIFields is turned on. | |
| 1653 ret = jfieldIDWorkaround::to_instance_jfieldID(k(), fd.offset()); | |
| 1654 return ret; | |
| 1655 JNI_END | |
| 1656 | |
| 1657 | |
| 1658 JNI_ENTRY(jobject, jni_GetObjectField(JNIEnv *env, jobject obj, jfieldID fieldID)) | |
| 1659 JNIWrapper("GetObjectField"); | |
| 1660 DTRACE_PROBE3(hotspot_jni, GetObjectField__entry, env, obj, fieldID); | |
| 1661 oop o = JNIHandles::resolve_non_null(obj); | |
| 1662 klassOop k = o->klass(); | |
| 1663 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID); | |
| 1664 // Keep JVMTI addition small and only check enabled flag here. | |
| 1665 // jni_GetField_probe() assumes that is okay to create handles. | |
| 1666 if (JvmtiExport::should_post_field_access()) { | |
| 1667 o = JvmtiExport::jni_GetField_probe(thread, obj, o, k, fieldID, false); | |
| 1668 } | |
| 1669 jobject ret = JNIHandles::make_local(env, o->obj_field(offset)); | |
| 1670 DTRACE_PROBE1(hotspot_jni, GetObjectField__return, ret); | |
| 1671 return ret; | |
| 1672 JNI_END | |
| 1673 | |
| 1674 | |
| 1675 #define DEFINE_GETFIELD(Return,Fieldname,Result) \ | |
| 1676 \ | |
| 1677 DT_RETURN_MARK_DECL_FOR(Result, Get##Result##Field, Return);\ | |
| 1678 \ | |
| 1679 JNI_QUICK_ENTRY(Return, jni_Get##Result##Field(JNIEnv *env, jobject obj, jfieldID fieldID)) \ | |
| 1680 JNIWrapper("Get" XSTR(Result) "Field"); \ | |
| 1681 \ | |
| 1682 DTRACE_PROBE3(hotspot_jni, Get##Result##Field__entry, env, obj, fieldID);\ | |
| 1683 Return ret = 0;\ | |
| 1684 DT_RETURN_MARK_FOR(Result, Get##Result##Field, Return, (const Return&)ret);\ | |
| 1685 \ | |
| 1686 oop o = JNIHandles::resolve_non_null(obj); \ | |
| 1687 klassOop k = o->klass(); \ | |
| 1688 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID); \ | |
| 1689 /* Keep JVMTI addition small and only check enabled flag here. */ \ | |
| 1690 /* jni_GetField_probe_nh() assumes that is not okay to create handles */ \ | |
| 1691 /* and creates a ResetNoHandleMark. */ \ | |
| 1692 if (JvmtiExport::should_post_field_access()) { \ | |
| 1693 o = JvmtiExport::jni_GetField_probe_nh(thread, obj, o, k, fieldID, false); \ | |
| 1694 } \ | |
| 1695 ret = o->Fieldname##_field(offset); \ | |
| 1696 return ret; \ | |
| 1697 JNI_END | |
| 1698 | |
| 1699 DEFINE_GETFIELD(jboolean, bool, Boolean) | |
| 1700 DEFINE_GETFIELD(jbyte, byte, Byte) | |
| 1701 DEFINE_GETFIELD(jchar, char, Char) | |
| 1702 DEFINE_GETFIELD(jshort, short, Short) | |
| 1703 DEFINE_GETFIELD(jint, int, Int) | |
| 1704 DEFINE_GETFIELD(jlong, long, Long) | |
| 1705 DEFINE_GETFIELD(jfloat, float, Float) | |
| 1706 DEFINE_GETFIELD(jdouble, double, Double) | |
| 1707 | |
| 1708 address jni_GetBooleanField_addr() { | |
| 1709 return (address)jni_GetBooleanField; | |
| 1710 } | |
| 1711 address jni_GetByteField_addr() { | |
| 1712 return (address)jni_GetByteField; | |
| 1713 } | |
| 1714 address jni_GetCharField_addr() { | |
| 1715 return (address)jni_GetCharField; | |
| 1716 } | |
| 1717 address jni_GetShortField_addr() { | |
| 1718 return (address)jni_GetShortField; | |
| 1719 } | |
| 1720 address jni_GetIntField_addr() { | |
| 1721 return (address)jni_GetIntField; | |
| 1722 } | |
| 1723 address jni_GetLongField_addr() { | |
| 1724 return (address)jni_GetLongField; | |
| 1725 } | |
| 1726 address jni_GetFloatField_addr() { | |
| 1727 return (address)jni_GetFloatField; | |
| 1728 } | |
| 1729 address jni_GetDoubleField_addr() { | |
| 1730 return (address)jni_GetDoubleField; | |
| 1731 } | |
| 1732 | |
| 1733 JNI_QUICK_ENTRY(void, jni_SetObjectField(JNIEnv *env, jobject obj, jfieldID fieldID, jobject value)) | |
| 1734 JNIWrapper("SetObjectField"); | |
| 1735 DTRACE_PROBE4(hotspot_jni, SetObjectField__entry, env, obj, fieldID, value); | |
| 1736 oop o = JNIHandles::resolve_non_null(obj); | |
| 1737 klassOop k = o->klass(); | |
| 1738 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID); | |
| 1739 // Keep JVMTI addition small and only check enabled flag here. | |
| 1740 // jni_SetField_probe_nh() assumes that is not okay to create handles | |
| 1741 // and creates a ResetNoHandleMark. | |
| 1742 if (JvmtiExport::should_post_field_modification()) { | |
| 1743 jvalue field_value; | |
| 1744 field_value.l = value; | |
| 1745 o = JvmtiExport::jni_SetField_probe_nh(thread, obj, o, k, fieldID, false, 'L', (jvalue *)&field_value); | |
| 1746 } | |
| 1747 o->obj_field_put(offset, JNIHandles::resolve(value)); | |
| 1748 DTRACE_PROBE(hotspot_jni, SetObjectField__return); | |
| 1749 JNI_END | |
| 1750 | |
| 1751 #define DEFINE_SETFIELD(Argument,Fieldname,Result,SigType,unionType) \ | |
| 1752 \ | |
| 1753 JNI_QUICK_ENTRY(void, jni_Set##Result##Field(JNIEnv *env, jobject obj, jfieldID fieldID, Argument value)) \ | |
| 1754 JNIWrapper("Set" XSTR(Result) "Field"); \ | |
| 1755 \ | |
| 1756 HS_DTRACE_PROBE_CDECL_N(hotspot_jni, Set##Result##Field__entry, \ | |
| 1757 ( JNIEnv*, jobject, jfieldID FP_SELECT_##Result(COMMA Argument,/*empty*/) ) ); \ | |
| 1758 HS_DTRACE_PROBE_N(hotspot_jni, Set##Result##Field__entry, \ | |
| 1759 ( env, obj, fieldID FP_SELECT_##Result(COMMA value,/*empty*/) ) ); \ | |
| 1760 \ | |
| 1761 oop o = JNIHandles::resolve_non_null(obj); \ | |
| 1762 klassOop k = o->klass(); \ | |
| 1763 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID); \ | |
| 1764 /* Keep JVMTI addition small and only check enabled flag here. */ \ | |
| 1765 /* jni_SetField_probe_nh() assumes that is not okay to create handles */ \ | |
| 1766 /* and creates a ResetNoHandleMark. */ \ | |
| 1767 if (JvmtiExport::should_post_field_modification()) { \ | |
| 1768 jvalue field_value; \ | |
| 1769 field_value.unionType = value; \ | |
| 1770 o = JvmtiExport::jni_SetField_probe_nh(thread, obj, o, k, fieldID, false, SigType, (jvalue *)&field_value); \ | |
| 1771 } \ | |
| 1772 o->Fieldname##_field_put(offset, value); \ | |
| 1773 DTRACE_PROBE(hotspot_jni, Set##Result##Field__return);\ | |
| 1774 JNI_END | |
| 1775 | |
| 1776 DEFINE_SETFIELD(jboolean, bool, Boolean, 'Z', z) | |
| 1777 DEFINE_SETFIELD(jbyte, byte, Byte, 'B', b) | |
| 1778 DEFINE_SETFIELD(jchar, char, Char, 'C', c) | |
| 1779 DEFINE_SETFIELD(jshort, short, Short, 'S', s) | |
| 1780 DEFINE_SETFIELD(jint, int, Int, 'I', i) | |
| 1781 DEFINE_SETFIELD(jlong, long, Long, 'J', j) | |
| 1782 DEFINE_SETFIELD(jfloat, float, Float, 'F', f) | |
| 1783 DEFINE_SETFIELD(jdouble, double, Double, 'D', d) | |
| 1784 | |
| 1785 DT_RETURN_MARK_DECL(ToReflectedField, jobject); | |
| 1786 | |
| 1787 JNI_ENTRY(jobject, jni_ToReflectedField(JNIEnv *env, jclass cls, jfieldID fieldID, jboolean isStatic)) | |
| 1788 JNIWrapper("ToReflectedField"); | |
| 1789 DTRACE_PROBE4(hotspot_jni, ToReflectedField__entry, | |
| 1790 env, cls, fieldID, isStatic); | |
| 1791 jobject ret = NULL; | |
| 1792 DT_RETURN_MARK(ToReflectedField, jobject, (const jobject&)ret); | |
| 1793 | |
| 1794 fieldDescriptor fd; | |
| 1795 bool found = false; | |
| 1796 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); | |
| 1797 | |
| 1798 assert(jfieldIDWorkaround::is_static_jfieldID(fieldID) == (isStatic != 0), "invalid fieldID"); | |
| 1799 | |
| 1800 if (isStatic) { | |
| 1801 // Static field. The fieldID a JNIid specifying the field holder and the offset within the klassOop. | |
| 1802 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID); | |
| 1803 assert(id->is_static_field_id(), "invalid static field id"); | |
| 1804 found = instanceKlass::cast(id->holder())->find_local_field_from_offset(id->offset(), true, &fd); | |
| 1805 } else { | |
| 1806 // Non-static field. The fieldID is really the offset of the field within the instanceOop. | |
| 1807 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID); | |
| 1808 found = instanceKlass::cast(k)->find_field_from_offset(offset, false, &fd); | |
| 1809 } | |
| 1810 assert(found, "bad fieldID passed into jni_ToReflectedField"); | |
| 1811 oop reflected = Reflection::new_field(&fd, UseNewReflection, CHECK_NULL); | |
| 1812 ret = JNIHandles::make_local(env, reflected); | |
| 1813 return ret; | |
| 1814 JNI_END | |
| 1815 | |
| 1816 | |
| 1817 // | |
| 1818 // Accessing Static Fields | |
| 1819 // | |
| 1820 DT_RETURN_MARK_DECL(GetStaticFieldID, jfieldID); | |
| 1821 | |
| 1822 JNI_ENTRY(jfieldID, jni_GetStaticFieldID(JNIEnv *env, jclass clazz, | |
| 1823 const char *name, const char *sig)) | |
| 1824 JNIWrapper("GetStaticFieldID"); | |
| 1825 DTRACE_PROBE4(hotspot_jni, GetStaticFieldID__entry, env, clazz, name, sig); | |
| 1826 jfieldID ret = NULL; | |
| 1827 DT_RETURN_MARK(GetStaticFieldID, jfieldID, (const jfieldID&)ret); | |
| 1828 | |
| 1829 // The class should have been loaded (we have an instance of the class | |
| 1830 // passed in) so the field and signature should already be in the symbol | |
| 1831 // table. If they're not there, the field doesn't exist. | |
| 1832 symbolHandle fieldname = | |
| 1833 symbolHandle(THREAD, SymbolTable::probe(name, (int)strlen(name))); | |
| 1834 symbolHandle signame = | |
| 1835 symbolHandle(THREAD, SymbolTable::probe(sig, (int)strlen(sig))); | |
| 1836 if (fieldname.is_null() || signame.is_null()) { | |
| 1837 THROW_MSG_0(vmSymbols::java_lang_NoSuchFieldError(), (char*) name); | |
| 1838 } | |
| 1839 KlassHandle k(THREAD, | |
| 1840 java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(clazz))); | |
| 1841 // Make sure class is initialized before handing id's out to static fields | |
| 1842 Klass::cast(k())->initialize(CHECK_NULL); | |
| 1843 | |
| 1844 fieldDescriptor fd; | |
| 1845 if (!Klass::cast(k())->oop_is_instance() || | |
| 1846 !instanceKlass::cast(k())->find_field(fieldname(), signame(), true, &fd)) { | |
| 1847 THROW_MSG_0(vmSymbols::java_lang_NoSuchFieldError(), (char*) name); | |
| 1848 } | |
| 1849 | |
| 1850 // A jfieldID for a static field is a JNIid specifying the field holder and the offset within the klassOop | |
| 1851 JNIid* id = instanceKlass::cast(fd.field_holder())->jni_id_for(fd.offset()); | |
| 1852 debug_only(id->set_is_static_field_id();) | |
| 1853 | |
| 1854 debug_only(int first_offset = instanceKlass::cast(fd.field_holder())->offset_of_static_fields();) | |
| 1855 debug_only(int end_offset = first_offset + (instanceKlass::cast(fd.field_holder())->static_field_size() * wordSize);) | |
| 1856 assert(id->offset() >= first_offset && id->offset() < end_offset, "invalid static field offset"); | |
| 1857 | |
| 1858 ret = jfieldIDWorkaround::to_static_jfieldID(id); | |
| 1859 return ret; | |
| 1860 JNI_END | |
| 1861 | |
| 1862 | |
| 1863 JNI_ENTRY(jobject, jni_GetStaticObjectField(JNIEnv *env, jclass clazz, jfieldID fieldID)) | |
| 1864 JNIWrapper("GetStaticObjectField"); | |
| 1865 DTRACE_PROBE3(hotspot_jni, GetStaticObjectField__entry, env, clazz, fieldID); | |
| 1866 #ifndef JNICHECK_KERNEL | |
| 1867 DEBUG_ONLY(klassOop param_k = jniCheck::validate_class(thread, clazz);) | |
| 1868 #endif // JNICHECK_KERNEL | |
| 1869 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID); | |
| 1870 assert(id->is_static_field_id(), "invalid static field id"); | |
| 1871 // Keep JVMTI addition small and only check enabled flag here. | |
| 1872 // jni_GetField_probe() assumes that is okay to create handles. | |
| 1873 if (JvmtiExport::should_post_field_access()) { | |
| 1874 JvmtiExport::jni_GetField_probe(thread, NULL, NULL, id->holder(), fieldID, true); | |
| 1875 } | |
| 1876 jobject ret = JNIHandles::make_local(id->holder()->obj_field(id->offset())); | |
| 1877 DTRACE_PROBE1(hotspot_jni, GetStaticObjectField__return, ret); | |
| 1878 return ret; | |
| 1879 JNI_END | |
| 1880 | |
| 1881 #define DEFINE_GETSTATICFIELD(Return,Fieldname,Result) \ | |
| 1882 \ | |
| 1883 DT_RETURN_MARK_DECL_FOR(Result, GetStatic##Result##Field, Return);\ | |
| 1884 \ | |
| 1885 JNI_ENTRY(Return, jni_GetStatic##Result##Field(JNIEnv *env, jclass clazz, jfieldID fieldID)) \ | |
| 1886 JNIWrapper("GetStatic" XSTR(Result) "Field"); \ | |
| 1887 DTRACE_PROBE3(hotspot_jni, GetStatic##Result##Field__entry, env, clazz, fieldID);\ | |
| 1888 Return ret = 0;\ | |
| 1889 DT_RETURN_MARK_FOR(Result, GetStatic##Result##Field, Return, \ | |
| 1890 (const Return&)ret);\ | |
| 1891 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID); \ | |
| 1892 assert(id->is_static_field_id(), "invalid static field id"); \ | |
| 1893 /* Keep JVMTI addition small and only check enabled flag here. */ \ | |
| 1894 /* jni_GetField_probe() assumes that is okay to create handles. */ \ | |
| 1895 if (JvmtiExport::should_post_field_access()) { \ | |
| 1896 JvmtiExport::jni_GetField_probe(thread, NULL, NULL, id->holder(), fieldID, true); \ | |
| 1897 } \ | |
| 1898 ret = id->holder()-> Fieldname##_field (id->offset()); \ | |
| 1899 return ret;\ | |
| 1900 JNI_END | |
| 1901 | |
| 1902 DEFINE_GETSTATICFIELD(jboolean, bool, Boolean) | |
| 1903 DEFINE_GETSTATICFIELD(jbyte, byte, Byte) | |
| 1904 DEFINE_GETSTATICFIELD(jchar, char, Char) | |
| 1905 DEFINE_GETSTATICFIELD(jshort, short, Short) | |
| 1906 DEFINE_GETSTATICFIELD(jint, int, Int) | |
| 1907 DEFINE_GETSTATICFIELD(jlong, long, Long) | |
| 1908 DEFINE_GETSTATICFIELD(jfloat, float, Float) | |
| 1909 DEFINE_GETSTATICFIELD(jdouble, double, Double) | |
| 1910 | |
| 1911 | |
| 1912 JNI_ENTRY(void, jni_SetStaticObjectField(JNIEnv *env, jclass clazz, jfieldID fieldID, jobject value)) | |
| 1913 JNIWrapper("SetStaticObjectField"); | |
| 1914 DTRACE_PROBE4(hotspot_jni, SetStaticObjectField__entry, env, clazz, fieldID, value); | |
| 1915 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID); | |
| 1916 assert(id->is_static_field_id(), "invalid static field id"); | |
| 1917 // Keep JVMTI addition small and only check enabled flag here. | |
| 1918 // jni_SetField_probe() assumes that is okay to create handles. | |
| 1919 if (JvmtiExport::should_post_field_modification()) { | |
| 1920 jvalue field_value; | |
| 1921 field_value.l = value; | |
| 1922 JvmtiExport::jni_SetField_probe(thread, NULL, NULL, id->holder(), fieldID, true, 'L', (jvalue *)&field_value); | |
| 1923 } | |
| 1924 id->holder()->obj_field_put(id->offset(), JNIHandles::resolve(value)); | |
| 1925 DTRACE_PROBE(hotspot_jni, SetStaticObjectField__return); | |
| 1926 JNI_END | |
| 1927 | |
| 1928 | |
| 1929 #define DEFINE_SETSTATICFIELD(Argument,Fieldname,Result,SigType,unionType) \ | |
| 1930 \ | |
| 1931 JNI_ENTRY(void, jni_SetStatic##Result##Field(JNIEnv *env, jclass clazz, jfieldID fieldID, Argument value)) \ | |
| 1932 JNIWrapper("SetStatic" XSTR(Result) "Field"); \ | |
| 1933 HS_DTRACE_PROBE_CDECL_N(hotspot_jni, SetStatic##Result##Field__entry,\ | |
| 1934 ( JNIEnv*, jclass, jfieldID FP_SELECT_##Result(COMMA Argument,/*empty*/) ) ); \ | |
| 1935 HS_DTRACE_PROBE_N(hotspot_jni, SetStatic##Result##Field__entry, \ | |
| 1936 ( env, clazz, fieldID FP_SELECT_##Result(COMMA value,/*empty*/) ) ); \ | |
| 1937 \ | |
| 1938 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID); \ | |
| 1939 assert(id->is_static_field_id(), "invalid static field id"); \ | |
| 1940 /* Keep JVMTI addition small and only check enabled flag here. */ \ | |
| 1941 /* jni_SetField_probe() assumes that is okay to create handles. */ \ | |
| 1942 if (JvmtiExport::should_post_field_modification()) { \ | |
| 1943 jvalue field_value; \ | |
| 1944 field_value.unionType = value; \ | |
| 1945 JvmtiExport::jni_SetField_probe(thread, NULL, NULL, id->holder(), fieldID, true, SigType, (jvalue *)&field_value); \ | |
| 1946 } \ | |
| 1947 id->holder()-> Fieldname##_field_put (id->offset(), value); \ | |
| 1948 DTRACE_PROBE(hotspot_jni, SetStatic##Result##Field__return);\ | |
| 1949 JNI_END | |
| 1950 | |
| 1951 DEFINE_SETSTATICFIELD(jboolean, bool, Boolean, 'Z', z) | |
| 1952 DEFINE_SETSTATICFIELD(jbyte, byte, Byte, 'B', b) | |
| 1953 DEFINE_SETSTATICFIELD(jchar, char, Char, 'C', c) | |
| 1954 DEFINE_SETSTATICFIELD(jshort, short, Short, 'S', s) | |
| 1955 DEFINE_SETSTATICFIELD(jint, int, Int, 'I', i) | |
| 1956 DEFINE_SETSTATICFIELD(jlong, long, Long, 'J', j) | |
| 1957 DEFINE_SETSTATICFIELD(jfloat, float, Float, 'F', f) | |
| 1958 DEFINE_SETSTATICFIELD(jdouble, double, Double, 'D', d) | |
| 1959 | |
| 1960 | |
| 1961 // | |
| 1962 // String Operations | |
| 1963 // | |
| 1964 | |
| 1965 // Unicode Interface | |
| 1966 | |
| 1967 DT_RETURN_MARK_DECL(NewString, jstring); | |
| 1968 | |
| 1969 JNI_ENTRY(jstring, jni_NewString(JNIEnv *env, const jchar *unicodeChars, jsize len)) | |
| 1970 JNIWrapper("NewString"); | |
| 1971 DTRACE_PROBE3(hotspot_jni, NewString__entry, env, unicodeChars, len); | |
| 1972 jstring ret = NULL; | |
| 1973 DT_RETURN_MARK(NewString, jstring, (const jstring&)ret); | |
| 1974 oop string=java_lang_String::create_oop_from_unicode((jchar*) unicodeChars, len, CHECK_NULL); | |
| 1975 ret = (jstring) JNIHandles::make_local(env, string); | |
| 1976 return ret; | |
| 1977 JNI_END | |
| 1978 | |
| 1979 | |
| 1980 JNI_QUICK_ENTRY(jsize, jni_GetStringLength(JNIEnv *env, jstring string)) | |
| 1981 JNIWrapper("GetStringLength"); | |
| 1982 DTRACE_PROBE2(hotspot_jni, GetStringLength__entry, env, string); | |
| 1983 jsize ret = java_lang_String::length(JNIHandles::resolve_non_null(string)); | |
| 1984 DTRACE_PROBE1(hotspot_jni, GetStringLength__return, ret); | |
| 1985 return ret; | |
| 1986 JNI_END | |
| 1987 | |
| 1988 | |
| 1989 JNI_QUICK_ENTRY(const jchar*, jni_GetStringChars( | |
| 1990 JNIEnv *env, jstring string, jboolean *isCopy)) | |
| 1991 JNIWrapper("GetStringChars"); | |
| 1992 DTRACE_PROBE3(hotspot_jni, GetStringChars__entry, env, string, isCopy); | |
| 1993 //%note jni_5 | |
| 1994 if (isCopy != NULL) { | |
| 1995 *isCopy = JNI_TRUE; | |
| 1996 } | |
| 1997 oop s = JNIHandles::resolve_non_null(string); | |
| 1998 int s_len = java_lang_String::length(s); | |
| 1999 typeArrayOop s_value = java_lang_String::value(s); | |
| 2000 int s_offset = java_lang_String::offset(s); | |
| 2001 jchar* buf = NEW_C_HEAP_ARRAY(jchar, s_len + 1); // add one for zero termination | |
| 2002 if (s_len > 0) { | |
| 2003 memcpy(buf, s_value->char_at_addr(s_offset), sizeof(jchar)*s_len); | |
| 2004 } | |
| 2005 buf[s_len] = 0; | |
| 2006 DTRACE_PROBE1(hotspot_jni, GetStringChars__return, buf); | |
| 2007 return buf; | |
| 2008 JNI_END | |
| 2009 | |
| 2010 | |
| 2011 JNI_QUICK_ENTRY(void, jni_ReleaseStringChars(JNIEnv *env, jstring str, const jchar *chars)) | |
| 2012 JNIWrapper("ReleaseStringChars"); | |
| 2013 DTRACE_PROBE3(hotspot_jni, ReleaseStringChars__entry, env, str, chars); | |
| 2014 //%note jni_6 | |
| 2015 if (chars != NULL) { | |
| 2016 // Since String objects are supposed to be immutable, don't copy any | |
| 2017 // new data back. A bad user will have to go after the char array. | |
| 2018 FreeHeap((void*) chars); | |
| 2019 } | |
| 2020 DTRACE_PROBE(hotspot_jni, ReleaseStringChars__return); | |
| 2021 JNI_END | |
| 2022 | |
| 2023 | |
| 2024 // UTF Interface | |
| 2025 | |
| 2026 DT_RETURN_MARK_DECL(NewStringUTF, jstring); | |
| 2027 | |
| 2028 JNI_ENTRY(jstring, jni_NewStringUTF(JNIEnv *env, const char *bytes)) | |
| 2029 JNIWrapper("NewStringUTF"); | |
| 2030 DTRACE_PROBE2(hotspot_jni, NewStringUTF__entry, env, bytes); | |
| 2031 jstring ret; | |
| 2032 DT_RETURN_MARK(NewStringUTF, jstring, (const jstring&)ret); | |
| 2033 | |
| 2034 oop result = java_lang_String::create_oop_from_str((char*) bytes, CHECK_NULL); | |
| 2035 ret = (jstring) JNIHandles::make_local(env, result); | |
| 2036 return ret; | |
| 2037 JNI_END | |
| 2038 | |
| 2039 | |
| 2040 JNI_ENTRY(jsize, jni_GetStringUTFLength(JNIEnv *env, jstring string)) | |
| 2041 JNIWrapper("GetStringUTFLength"); | |
| 2042 DTRACE_PROBE2(hotspot_jni, GetStringUTFLength__entry, env, string); | |
| 2043 jsize ret = java_lang_String::utf8_length(JNIHandles::resolve_non_null(string)); | |
| 2044 DTRACE_PROBE1(hotspot_jni, GetStringUTFLength__return, ret); | |
| 2045 return ret; | |
| 2046 JNI_END | |
| 2047 | |
| 2048 | |
| 2049 JNI_ENTRY(const char*, jni_GetStringUTFChars(JNIEnv *env, jstring string, jboolean *isCopy)) | |
| 2050 JNIWrapper("GetStringUTFChars"); | |
| 2051 DTRACE_PROBE3(hotspot_jni, GetStringUTFChars__entry, env, string, isCopy); | |
| 2052 ResourceMark rm; | |
| 2053 char* str = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(string)); | |
| 2054 int length = (int)strlen(str); | |
| 2055 char* result = AllocateHeap(length+1, "GetStringUTFChars"); | |
| 2056 strcpy(result, str); | |
| 2057 if (isCopy != NULL) *isCopy = JNI_TRUE; | |
| 2058 DTRACE_PROBE1(hotspot_jni, GetStringUTFChars__return, result); | |
| 2059 return result; | |
| 2060 JNI_END | |
| 2061 | |
| 2062 | |
| 2063 JNI_LEAF(void, jni_ReleaseStringUTFChars(JNIEnv *env, jstring str, const char *chars)) | |
| 2064 JNIWrapper("ReleaseStringUTFChars"); | |
| 2065 DTRACE_PROBE3(hotspot_jni, ReleaseStringUTFChars__entry, env, str, chars); | |
| 2066 if (chars != NULL) { | |
| 2067 FreeHeap((char*) chars); | |
| 2068 } | |
| 2069 DTRACE_PROBE(hotspot_jni, ReleaseStringUTFChars__return); | |
| 2070 JNI_END | |
| 2071 | |
| 2072 | |
| 2073 JNI_QUICK_ENTRY(jsize, jni_GetArrayLength(JNIEnv *env, jarray array)) | |
| 2074 JNIWrapper("GetArrayLength"); | |
| 2075 DTRACE_PROBE2(hotspot_jni, GetArrayLength__entry, env, array); | |
| 2076 arrayOop a = arrayOop(JNIHandles::resolve_non_null(array)); | |
| 2077 assert(a->is_array(), "must be array"); | |
| 2078 jsize ret = a->length(); | |
| 2079 DTRACE_PROBE1(hotspot_jni, GetArrayLength__return, ret); | |
| 2080 return ret; | |
| 2081 JNI_END | |
| 2082 | |
| 2083 | |
| 2084 // | |
| 2085 // Object Array Operations | |
| 2086 // | |
| 2087 | |
| 2088 DT_RETURN_MARK_DECL(NewObjectArray, jobjectArray); | |
| 2089 | |
| 2090 JNI_ENTRY(jobjectArray, jni_NewObjectArray(JNIEnv *env, jsize length, jclass elementClass, jobject initialElement)) | |
| 2091 JNIWrapper("NewObjectArray"); | |
| 2092 DTRACE_PROBE4(hotspot_jni, NewObjectArray__entry, env, length, elementClass, initialElement); | |
| 2093 jobjectArray ret = NULL; | |
| 2094 DT_RETURN_MARK(NewObjectArray, jobjectArray, (const jobjectArray&)ret); | |
| 2095 KlassHandle ek(THREAD, java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(elementClass))); | |
| 2096 klassOop ako = Klass::cast(ek())->array_klass(CHECK_NULL); | |
| 2097 KlassHandle ak = KlassHandle(THREAD, ako); | |
| 2098 objArrayKlass::cast(ak())->initialize(CHECK_NULL); | |
| 2099 objArrayOop result = objArrayKlass::cast(ak())->allocate(length, CHECK_NULL); | |
| 2100 oop initial_value = JNIHandles::resolve(initialElement); | |
| 2101 if (initial_value != NULL) { // array already initialized with NULL | |
| 2102 for (int index = 0; index < length; index++) { | |
| 2103 result->obj_at_put(index, initial_value); | |
| 2104 } | |
| 2105 } | |
| 2106 ret = (jobjectArray) JNIHandles::make_local(env, result); | |
| 2107 return ret; | |
| 2108 JNI_END | |
| 2109 | |
| 2110 DT_RETURN_MARK_DECL(GetObjectArrayElement, jobject); | |
| 2111 | |
| 2112 JNI_ENTRY(jobject, jni_GetObjectArrayElement(JNIEnv *env, jobjectArray array, jsize index)) | |
| 2113 JNIWrapper("GetObjectArrayElement"); | |
| 2114 DTRACE_PROBE3(hotspot_jni, GetObjectArrayElement__entry, env, array, index); | |
| 2115 jobject ret = NULL; | |
| 2116 DT_RETURN_MARK(GetObjectArrayElement, jobject, (const jobject&)ret); | |
| 2117 objArrayOop a = objArrayOop(JNIHandles::resolve_non_null(array)); | |
| 2118 if (a->is_within_bounds(index)) { | |
| 2119 jobject ret = JNIHandles::make_local(env, a->obj_at(index)); | |
| 2120 return ret; | |
| 2121 } else { | |
| 2122 char buf[jintAsStringSize]; | |
| 2123 sprintf(buf, "%d", index); | |
| 2124 THROW_MSG_0(vmSymbols::java_lang_ArrayIndexOutOfBoundsException(), buf); | |
| 2125 } | |
| 2126 JNI_END | |
| 2127 | |
| 2128 DT_VOID_RETURN_MARK_DECL(SetObjectArrayElement); | |
| 2129 | |
| 2130 JNI_ENTRY(void, jni_SetObjectArrayElement(JNIEnv *env, jobjectArray array, jsize index, jobject value)) | |
| 2131 JNIWrapper("SetObjectArrayElement"); | |
| 2132 DTRACE_PROBE4(hotspot_jni, SetObjectArrayElement__entry, env, array, index, value); | |
| 2133 DT_VOID_RETURN_MARK(SetObjectArrayElement); | |
| 2134 | |
| 2135 objArrayOop a = objArrayOop(JNIHandles::resolve_non_null(array)); | |
| 2136 oop v = JNIHandles::resolve(value); | |
| 2137 if (a->is_within_bounds(index)) { | |
| 2138 if (v == NULL || v->is_a(objArrayKlass::cast(a->klass())->element_klass())) { | |
| 2139 a->obj_at_put(index, v); | |
| 2140 } else { | |
| 2141 THROW(vmSymbols::java_lang_ArrayStoreException()); | |
| 2142 } | |
| 2143 } else { | |
| 2144 char buf[jintAsStringSize]; | |
| 2145 sprintf(buf, "%d", index); | |
| 2146 THROW_MSG(vmSymbols::java_lang_ArrayIndexOutOfBoundsException(), buf); | |
| 2147 } | |
| 2148 JNI_END | |
| 2149 | |
| 2150 | |
| 2151 #define DEFINE_NEWSCALARARRAY(Return,Allocator,Result) \ | |
| 2152 \ | |
| 2153 DT_RETURN_MARK_DECL_FOR(Result, New##Result##Array, Return);\ | |
| 2154 \ | |
| 2155 JNI_ENTRY(Return, \ | |
| 2156 jni_New##Result##Array(JNIEnv *env, jsize len)) \ | |
| 2157 JNIWrapper("New" XSTR(Result) "Array"); \ | |
| 2158 DTRACE_PROBE2(hotspot_jni, New##Result##Array__entry, env, len);\ | |
| 2159 Return ret = NULL;\ | |
| 2160 DT_RETURN_MARK_FOR(Result, New##Result##Array, Return, (const Return&)ret);\ | |
| 2161 \ | |
| 2162 oop obj= oopFactory::Allocator(len, CHECK_0); \ | |
| 2163 ret = (Return) JNIHandles::make_local(env, obj); \ | |
| 2164 return ret;\ | |
| 2165 JNI_END | |
| 2166 | |
| 2167 DEFINE_NEWSCALARARRAY(jbooleanArray, new_boolArray, Boolean) | |
| 2168 DEFINE_NEWSCALARARRAY(jbyteArray, new_byteArray, Byte) | |
| 2169 DEFINE_NEWSCALARARRAY(jshortArray, new_shortArray, Short) | |
| 2170 DEFINE_NEWSCALARARRAY(jcharArray, new_charArray, Char) | |
| 2171 DEFINE_NEWSCALARARRAY(jintArray, new_intArray, Int) | |
| 2172 DEFINE_NEWSCALARARRAY(jlongArray, new_longArray, Long) | |
| 2173 DEFINE_NEWSCALARARRAY(jfloatArray, new_singleArray, Float) | |
| 2174 DEFINE_NEWSCALARARRAY(jdoubleArray, new_doubleArray, Double) | |
| 2175 | |
| 2176 | |
| 2177 // Return an address which will fault if the caller writes to it. | |
| 2178 | |
| 2179 static char* get_bad_address() { | |
| 2180 static char* bad_address = NULL; | |
| 2181 if (bad_address == NULL) { | |
| 2182 size_t size = os::vm_allocation_granularity(); | |
| 2183 bad_address = os::reserve_memory(size); | |
| 2184 if (bad_address != NULL) { | |
|
477
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parents:
237
diff
changeset
|
2185 os::protect_memory(bad_address, size, os::MEM_PROT_READ, |
|
24fda36852ce
6727377: VM stack guard pages on Windows should PAGE_READWRITE not PAGE_EXECUTE_READWRITE
coleenp
parents:
237
diff
changeset
|
2186 /*is_committed*/false); |
| 0 | 2187 } |
| 2188 } | |
| 2189 return bad_address; | |
| 2190 } | |
| 2191 | |
| 2192 | |
| 2193 #define DEFINE_GETSCALARARRAYELEMENTS(ElementTag,ElementType,Result, Tag) \ | |
| 2194 \ | |
| 2195 JNI_QUICK_ENTRY(ElementType*, \ | |
| 2196 jni_Get##Result##ArrayElements(JNIEnv *env, ElementType##Array array, jboolean *isCopy)) \ | |
| 2197 JNIWrapper("Get" XSTR(Result) "ArrayElements"); \ | |
| 2198 DTRACE_PROBE3(hotspot_jni, Get##Result##ArrayElements__entry, env, array, isCopy);\ | |
| 2199 /* allocate an chunk of memory in c land */ \ | |
| 2200 typeArrayOop a = typeArrayOop(JNIHandles::resolve_non_null(array)); \ | |
| 2201 ElementType* result; \ | |
| 2202 int len = a->length(); \ | |
| 2203 if (len == 0) { \ | |
| 2204 /* Empty array: legal but useless, can't return NULL. \ | |
| 2205 * Return a pointer to something useless. \ | |
| 2206 * Avoid asserts in typeArrayOop. */ \ | |
| 2207 result = (ElementType*)get_bad_address(); \ | |
| 2208 } else { \ | |
| 2209 result = NEW_C_HEAP_ARRAY(ElementType, len); \ | |
| 2210 /* copy the array to the c chunk */ \ | |
| 2211 memcpy(result, a->Tag##_at_addr(0), sizeof(ElementType)*len); \ | |
| 2212 } \ | |
| 2213 if (isCopy) *isCopy = JNI_TRUE; \ | |
| 2214 DTRACE_PROBE1(hotspot_jni, Get##Result##ArrayElements__return, result);\ | |
| 2215 return result; \ | |
| 2216 JNI_END | |
| 2217 | |
| 2218 DEFINE_GETSCALARARRAYELEMENTS(T_BOOLEAN, jboolean, Boolean, bool) | |
| 2219 DEFINE_GETSCALARARRAYELEMENTS(T_BYTE, jbyte, Byte, byte) | |
| 2220 DEFINE_GETSCALARARRAYELEMENTS(T_SHORT, jshort, Short, short) | |
| 2221 DEFINE_GETSCALARARRAYELEMENTS(T_CHAR, jchar, Char, char) | |
| 2222 DEFINE_GETSCALARARRAYELEMENTS(T_INT, jint, Int, int) | |
| 2223 DEFINE_GETSCALARARRAYELEMENTS(T_LONG, jlong, Long, long) | |
| 2224 DEFINE_GETSCALARARRAYELEMENTS(T_FLOAT, jfloat, Float, float) | |
| 2225 DEFINE_GETSCALARARRAYELEMENTS(T_DOUBLE, jdouble, Double, double) | |
| 2226 | |
| 2227 | |
| 2228 #define DEFINE_RELEASESCALARARRAYELEMENTS(ElementTag,ElementType,Result,Tag) \ | |
| 2229 \ | |
| 2230 JNI_QUICK_ENTRY(void, \ | |
| 2231 jni_Release##Result##ArrayElements(JNIEnv *env, ElementType##Array array, \ | |
| 2232 ElementType *buf, jint mode)) \ | |
| 2233 JNIWrapper("Release" XSTR(Result) "ArrayElements"); \ | |
| 2234 DTRACE_PROBE4(hotspot_jni, Release##Result##ArrayElements__entry, env, array, buf, mode);\ | |
| 2235 typeArrayOop a = typeArrayOop(JNIHandles::resolve_non_null(array)); \ | |
| 2236 int len = a->length(); \ | |
| 2237 if (len != 0) { /* Empty array: nothing to free or copy. */ \ | |
| 2238 if ((mode == 0) || (mode == JNI_COMMIT)) { \ | |
| 2239 memcpy(a->Tag##_at_addr(0), buf, sizeof(ElementType)*len); \ | |
| 2240 } \ | |
| 2241 if ((mode == 0) || (mode == JNI_ABORT)) { \ | |
| 2242 FreeHeap(buf); \ | |
| 2243 } \ | |
| 2244 } \ | |
| 2245 DTRACE_PROBE(hotspot_jni, Release##Result##ArrayElements__return);\ | |
| 2246 JNI_END | |
| 2247 | |
| 2248 DEFINE_RELEASESCALARARRAYELEMENTS(T_BOOLEAN, jboolean, Boolean, bool) | |
| 2249 DEFINE_RELEASESCALARARRAYELEMENTS(T_BYTE, jbyte, Byte, byte) | |
| 2250 DEFINE_RELEASESCALARARRAYELEMENTS(T_SHORT, jshort, Short, short) | |
| 2251 DEFINE_RELEASESCALARARRAYELEMENTS(T_CHAR, jchar, Char, char) | |
| 2252 DEFINE_RELEASESCALARARRAYELEMENTS(T_INT, jint, Int, int) | |
| 2253 DEFINE_RELEASESCALARARRAYELEMENTS(T_LONG, jlong, Long, long) | |
| 2254 DEFINE_RELEASESCALARARRAYELEMENTS(T_FLOAT, jfloat, Float, float) | |
| 2255 DEFINE_RELEASESCALARARRAYELEMENTS(T_DOUBLE, jdouble, Double, double) | |
| 2256 | |
| 2257 #define DEFINE_GETSCALARARRAYREGION(ElementTag,ElementType,Result, Tag) \ | |
| 2258 DT_VOID_RETURN_MARK_DECL(Get##Result##ArrayRegion);\ | |
| 2259 \ | |
| 2260 JNI_ENTRY(void, \ | |
| 2261 jni_Get##Result##ArrayRegion(JNIEnv *env, ElementType##Array array, jsize start, \ | |
| 2262 jsize len, ElementType *buf)) \ | |
| 2263 JNIWrapper("Get" XSTR(Result) "ArrayRegion"); \ | |
| 2264 DTRACE_PROBE5(hotspot_jni, Get##Result##ArrayRegion__entry, env, array, start, len, buf);\ | |
| 2265 DT_VOID_RETURN_MARK(Get##Result##ArrayRegion); \ | |
| 2266 typeArrayOop src = typeArrayOop(JNIHandles::resolve_non_null(array)); \ | |
| 2267 if (start < 0 || len < 0 || ((unsigned int)start + (unsigned int)len > (unsigned int)src->length())) { \ | |
| 2268 THROW(vmSymbols::java_lang_ArrayIndexOutOfBoundsException()); \ | |
| 2269 } else { \ | |
| 2270 if (len > 0) { \ | |
| 2271 int sc = typeArrayKlass::cast(src->klass())->log2_element_size(); \ | |
| 2272 memcpy((u_char*) buf, \ | |
| 2273 (u_char*) src->Tag##_at_addr(start), \ | |
| 2274 len << sc); \ | |
| 2275 } \ | |
| 2276 } \ | |
| 2277 JNI_END | |
| 2278 | |
| 2279 DEFINE_GETSCALARARRAYREGION(T_BOOLEAN, jboolean,Boolean, bool) | |
| 2280 DEFINE_GETSCALARARRAYREGION(T_BYTE, jbyte, Byte, byte) | |
| 2281 DEFINE_GETSCALARARRAYREGION(T_SHORT, jshort, Short, short) | |
| 2282 DEFINE_GETSCALARARRAYREGION(T_CHAR, jchar, Char, char) | |
| 2283 DEFINE_GETSCALARARRAYREGION(T_INT, jint, Int, int) | |
| 2284 DEFINE_GETSCALARARRAYREGION(T_LONG, jlong, Long, long) | |
| 2285 DEFINE_GETSCALARARRAYREGION(T_FLOAT, jfloat, Float, float) | |
| 2286 DEFINE_GETSCALARARRAYREGION(T_DOUBLE, jdouble, Double, double) | |
| 2287 | |
| 2288 #define DEFINE_SETSCALARARRAYREGION(ElementTag,ElementType,Result, Tag) \ | |
| 2289 DT_VOID_RETURN_MARK_DECL(Set##Result##ArrayRegion);\ | |
| 2290 \ | |
| 2291 JNI_ENTRY(void, \ | |
| 2292 jni_Set##Result##ArrayRegion(JNIEnv *env, ElementType##Array array, jsize start, \ | |
| 2293 jsize len, const ElementType *buf)) \ | |
| 2294 JNIWrapper("Set" XSTR(Result) "ArrayRegion"); \ | |
| 2295 DTRACE_PROBE5(hotspot_jni, Set##Result##ArrayRegion__entry, env, array, start, len, buf);\ | |
| 2296 DT_VOID_RETURN_MARK(Set##Result##ArrayRegion); \ | |
| 2297 typeArrayOop dst = typeArrayOop(JNIHandles::resolve_non_null(array)); \ | |
| 2298 if (start < 0 || len < 0 || ((unsigned int)start + (unsigned int)len > (unsigned int)dst->length())) { \ | |
| 2299 THROW(vmSymbols::java_lang_ArrayIndexOutOfBoundsException()); \ | |
| 2300 } else { \ | |
| 2301 if (len > 0) { \ | |
| 2302 int sc = typeArrayKlass::cast(dst->klass())->log2_element_size(); \ | |
| 2303 memcpy((u_char*) dst->Tag##_at_addr(start), \ | |
| 2304 (u_char*) buf, \ | |
| 2305 len << sc); \ | |
| 2306 } \ | |
| 2307 } \ | |
| 2308 JNI_END | |
| 2309 | |
| 2310 DEFINE_SETSCALARARRAYREGION(T_BOOLEAN, jboolean, Boolean, bool) | |
| 2311 DEFINE_SETSCALARARRAYREGION(T_BYTE, jbyte, Byte, byte) | |
| 2312 DEFINE_SETSCALARARRAYREGION(T_SHORT, jshort, Short, short) | |
| 2313 DEFINE_SETSCALARARRAYREGION(T_CHAR, jchar, Char, char) | |
| 2314 DEFINE_SETSCALARARRAYREGION(T_INT, jint, Int, int) | |
| 2315 DEFINE_SETSCALARARRAYREGION(T_LONG, jlong, Long, long) | |
| 2316 DEFINE_SETSCALARARRAYREGION(T_FLOAT, jfloat, Float, float) | |
| 2317 DEFINE_SETSCALARARRAYREGION(T_DOUBLE, jdouble, Double, double) | |
| 2318 | |
| 2319 | |
| 2320 // | |
| 2321 // Interception of natives | |
| 2322 // | |
| 2323 | |
| 2324 // The RegisterNatives call being attempted tried to register with a method that | |
| 2325 // is not native. Ask JVM TI what prefixes have been specified. Then check | |
| 2326 // to see if the native method is now wrapped with the prefixes. See the | |
| 2327 // SetNativeMethodPrefix(es) functions in the JVM TI Spec for details. | |
| 2328 static methodOop find_prefixed_native(KlassHandle k, | |
| 2329 symbolHandle name, symbolHandle signature, TRAPS) { | |
| 2330 ResourceMark rm(THREAD); | |
| 2331 methodOop method; | |
| 2332 int name_len = name->utf8_length(); | |
| 2333 char* name_str = name->as_utf8(); | |
| 2334 int prefix_count; | |
| 2335 char** prefixes = JvmtiExport::get_all_native_method_prefixes(&prefix_count); | |
| 2336 for (int i = 0; i < prefix_count; i++) { | |
| 2337 char* prefix = prefixes[i]; | |
| 2338 int prefix_len = (int)strlen(prefix); | |
| 2339 | |
| 2340 // try adding this prefix to the method name and see if it matches another method name | |
| 2341 int trial_len = name_len + prefix_len; | |
| 2342 char* trial_name_str = NEW_RESOURCE_ARRAY(char, trial_len + 1); | |
| 2343 strcpy(trial_name_str, prefix); | |
| 2344 strcat(trial_name_str, name_str); | |
| 2345 symbolHandle trial_name(THREAD, SymbolTable::probe(trial_name_str, trial_len)); | |
| 2346 if (trial_name.is_null()) { | |
| 2347 continue; // no such symbol, so this prefix wasn't used, try the next prefix | |
| 2348 } | |
| 2349 method = Klass::cast(k())->lookup_method(trial_name(), signature()); | |
| 2350 if (method == NULL) { | |
| 2351 continue; // signature doesn't match, try the next prefix | |
| 2352 } | |
| 2353 if (method->is_native()) { | |
| 2354 method->set_is_prefixed_native(); | |
| 2355 return method; // wahoo, we found a prefixed version of the method, return it | |
| 2356 } | |
| 2357 // found as non-native, so prefix is good, add it, probably just need more prefixes | |
| 2358 name_len = trial_len; | |
| 2359 name_str = trial_name_str; | |
| 2360 } | |
| 2361 return NULL; // not found | |
| 2362 } | |
| 2363 | |
| 2364 static bool register_native(KlassHandle k, symbolHandle name, symbolHandle signature, address entry, TRAPS) { | |
| 2365 methodOop method = Klass::cast(k())->lookup_method(name(), signature()); | |
| 2366 if (method == NULL) { | |
| 2367 ResourceMark rm; | |
| 2368 stringStream st; | |
| 2369 st.print("Method %s name or signature does not match", | |
| 2370 methodOopDesc::name_and_sig_as_C_string(Klass::cast(k()), name(), signature())); | |
| 2371 THROW_MSG_(vmSymbols::java_lang_NoSuchMethodError(), st.as_string(), false); | |
| 2372 } | |
| 2373 if (!method->is_native()) { | |
| 2374 // trying to register to a non-native method, see if a JVM TI agent has added prefix(es) | |
| 2375 method = find_prefixed_native(k, name, signature, THREAD); | |
| 2376 if (method == NULL) { | |
| 2377 ResourceMark rm; | |
| 2378 stringStream st; | |
| 2379 st.print("Method %s is not declared as native", | |
| 2380 methodOopDesc::name_and_sig_as_C_string(Klass::cast(k()), name(), signature())); | |
| 2381 THROW_MSG_(vmSymbols::java_lang_NoSuchMethodError(), st.as_string(), false); | |
| 2382 } | |
| 2383 } | |
| 2384 | |
| 2385 if (entry != NULL) { | |
| 2386 method->set_native_function(entry, | |
| 2387 methodOopDesc::native_bind_event_is_interesting); | |
| 2388 } else { | |
| 2389 method->clear_native_function(); | |
| 2390 } | |
| 2391 if (PrintJNIResolving) { | |
| 2392 ResourceMark rm(THREAD); | |
| 2393 tty->print_cr("[Registering JNI native method %s.%s]", | |
| 2394 Klass::cast(method->method_holder())->external_name(), | |
| 2395 method->name()->as_C_string()); | |
| 2396 } | |
| 2397 return true; | |
| 2398 } | |
| 2399 | |
| 2400 DT_RETURN_MARK_DECL(RegisterNatives, jint); | |
| 2401 | |
| 2402 JNI_ENTRY(jint, jni_RegisterNatives(JNIEnv *env, jclass clazz, | |
| 2403 const JNINativeMethod *methods, | |
| 2404 jint nMethods)) | |
| 2405 JNIWrapper("RegisterNatives"); | |
| 2406 DTRACE_PROBE4(hotspot_jni, RegisterNatives__entry, env, clazz, methods, nMethods); | |
| 2407 jint ret = 0; | |
| 2408 DT_RETURN_MARK(RegisterNatives, jint, (const jint&)ret); | |
| 2409 | |
| 2410 KlassHandle h_k(thread, java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(clazz))); | |
| 2411 | |
| 2412 for (int index = 0; index < nMethods; index++) { | |
| 2413 const char* meth_name = methods[index].name; | |
| 2414 const char* meth_sig = methods[index].signature; | |
| 2415 int meth_name_len = (int)strlen(meth_name); | |
| 2416 | |
| 2417 // The class should have been loaded (we have an instance of the class | |
| 2418 // passed in) so the method and signature should already be in the symbol | |
| 2419 // table. If they're not there, the method doesn't exist. | |
| 2420 symbolHandle name(THREAD, SymbolTable::probe(meth_name, meth_name_len)); | |
| 2421 symbolHandle signature(THREAD, SymbolTable::probe(meth_sig, (int)strlen(meth_sig))); | |
| 2422 | |
| 2423 if (name.is_null() || signature.is_null()) { | |
| 2424 ResourceMark rm; | |
| 2425 stringStream st; | |
| 2426 st.print("Method %s.%s%s not found", Klass::cast(h_k())->external_name(), meth_name, meth_sig); | |
| 2427 // Must return negative value on failure | |
| 2428 THROW_MSG_(vmSymbols::java_lang_NoSuchMethodError(), st.as_string(), -1); | |
| 2429 } | |
| 2430 | |
| 2431 bool res = register_native(h_k, name, signature, | |
| 2432 (address) methods[index].fnPtr, THREAD); | |
| 2433 if (!res) { | |
| 2434 ret = -1; | |
| 2435 break; | |
| 2436 } | |
| 2437 } | |
| 2438 return ret; | |
| 2439 JNI_END | |
| 2440 | |
| 2441 | |
| 2442 JNI_ENTRY(jint, jni_UnregisterNatives(JNIEnv *env, jclass clazz)) | |
| 2443 JNIWrapper("UnregisterNatives"); | |
| 2444 DTRACE_PROBE2(hotspot_jni, UnregisterNatives__entry, env, clazz); | |
| 2445 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(clazz)); | |
| 2446 //%note jni_2 | |
| 2447 if (Klass::cast(k)->oop_is_instance()) { | |
| 2448 for (int index = 0; index < instanceKlass::cast(k)->methods()->length(); index++) { | |
| 2449 methodOop m = methodOop(instanceKlass::cast(k)->methods()->obj_at(index)); | |
| 2450 if (m->is_native()) { | |
| 2451 m->clear_native_function(); | |
| 2452 m->set_signature_handler(NULL); | |
| 2453 } | |
| 2454 } | |
| 2455 } | |
| 2456 DTRACE_PROBE1(hotspot_jni, UnregisterNatives__return, 0); | |
| 2457 return 0; | |
| 2458 JNI_END | |
| 2459 | |
| 2460 // | |
| 2461 // Monitor functions | |
| 2462 // | |
| 2463 | |
| 2464 DT_RETURN_MARK_DECL(MonitorEnter, jint); | |
| 2465 | |
| 2466 JNI_ENTRY(jint, jni_MonitorEnter(JNIEnv *env, jobject jobj)) | |
| 2467 DTRACE_PROBE2(hotspot_jni, MonitorEnter__entry, env, jobj); | |
| 2468 jint ret = JNI_ERR; | |
| 2469 DT_RETURN_MARK(MonitorEnter, jint, (const jint&)ret); | |
| 2470 | |
| 2471 // If the object is null, we can't do anything with it | |
| 2472 if (jobj == NULL) { | |
| 2473 THROW_(vmSymbols::java_lang_NullPointerException(), JNI_ERR); | |
| 2474 } | |
| 2475 | |
| 2476 Handle obj(thread, JNIHandles::resolve_non_null(jobj)); | |
| 2477 ObjectSynchronizer::jni_enter(obj, CHECK_(JNI_ERR)); | |
| 2478 ret = JNI_OK; | |
| 2479 return ret; | |
| 2480 JNI_END | |
| 2481 | |
| 2482 DT_RETURN_MARK_DECL(MonitorExit, jint); | |
| 2483 | |
| 2484 JNI_ENTRY(jint, jni_MonitorExit(JNIEnv *env, jobject jobj)) | |
| 2485 DTRACE_PROBE2(hotspot_jni, MonitorExit__entry, env, jobj); | |
| 2486 jint ret = JNI_ERR; | |
| 2487 DT_RETURN_MARK(MonitorExit, jint, (const jint&)ret); | |
| 2488 | |
| 2489 // Don't do anything with a null object | |
| 2490 if (jobj == NULL) { | |
| 2491 THROW_(vmSymbols::java_lang_NullPointerException(), JNI_ERR); | |
| 2492 } | |
| 2493 | |
| 2494 Handle obj(THREAD, JNIHandles::resolve_non_null(jobj)); | |
| 2495 ObjectSynchronizer::jni_exit(obj(), CHECK_(JNI_ERR)); | |
| 2496 | |
| 2497 ret = JNI_OK; | |
| 2498 return ret; | |
| 2499 JNI_END | |
| 2500 | |
| 2501 // | |
| 2502 // Extensions | |
| 2503 // | |
| 2504 | |
| 2505 DT_VOID_RETURN_MARK_DECL(GetStringRegion); | |
| 2506 | |
| 2507 JNI_ENTRY(void, jni_GetStringRegion(JNIEnv *env, jstring string, jsize start, jsize len, jchar *buf)) | |
| 2508 JNIWrapper("GetStringRegion"); | |
| 2509 DTRACE_PROBE5(hotspot_jni, GetStringRegion__entry, env, string, start, len, buf); | |
| 2510 DT_VOID_RETURN_MARK(GetStringRegion); | |
| 2511 oop s = JNIHandles::resolve_non_null(string); | |
| 2512 int s_len = java_lang_String::length(s); | |
| 2513 if (start < 0 || len < 0 || start + len > s_len) { | |
| 2514 THROW(vmSymbols::java_lang_StringIndexOutOfBoundsException()); | |
| 2515 } else { | |
| 2516 if (len > 0) { | |
| 2517 int s_offset = java_lang_String::offset(s); | |
| 2518 typeArrayOop s_value = java_lang_String::value(s); | |
| 2519 memcpy(buf, s_value->char_at_addr(s_offset+start), sizeof(jchar)*len); | |
| 2520 } | |
| 2521 } | |
| 2522 JNI_END | |
| 2523 | |
| 2524 DT_VOID_RETURN_MARK_DECL(GetStringUTFRegion); | |
| 2525 | |
| 2526 JNI_ENTRY(void, jni_GetStringUTFRegion(JNIEnv *env, jstring string, jsize start, jsize len, char *buf)) | |
| 2527 JNIWrapper("GetStringUTFRegion"); | |
| 2528 DTRACE_PROBE5(hotspot_jni, GetStringUTFRegion__entry, env, string, start, len, buf); | |
| 2529 DT_VOID_RETURN_MARK(GetStringUTFRegion); | |
| 2530 oop s = JNIHandles::resolve_non_null(string); | |
| 2531 int s_len = java_lang_String::length(s); | |
| 2532 if (start < 0 || len < 0 || start + len > s_len) { | |
| 2533 THROW(vmSymbols::java_lang_StringIndexOutOfBoundsException()); | |
| 2534 } else { | |
| 2535 //%note jni_7 | |
| 2536 if (len > 0) { | |
| 2537 ResourceMark rm(THREAD); | |
| 2538 char *utf_region = java_lang_String::as_utf8_string(s, start, len); | |
| 2539 int utf_len = (int)strlen(utf_region); | |
| 2540 memcpy(buf, utf_region, utf_len); | |
| 2541 buf[utf_len] = 0; | |
| 2542 } else { | |
| 2543 // JDK null-terminates the buffer even in len is zero | |
| 2544 if (buf != NULL) { | |
| 2545 buf[0] = 0; | |
| 2546 } | |
| 2547 } | |
| 2548 } | |
| 2549 JNI_END | |
| 2550 | |
| 2551 | |
| 2552 JNI_ENTRY(void*, jni_GetPrimitiveArrayCritical(JNIEnv *env, jarray array, jboolean *isCopy)) | |
| 2553 JNIWrapper("GetPrimitiveArrayCritical"); | |
| 2554 DTRACE_PROBE3(hotspot_jni, GetPrimitiveArrayCritical__entry, env, array, isCopy); | |
| 2555 GC_locker::lock_critical(thread); | |
| 2556 if (isCopy != NULL) { | |
| 2557 *isCopy = JNI_FALSE; | |
| 2558 } | |
| 2559 oop a = JNIHandles::resolve_non_null(array); | |
| 2560 assert(a->is_array(), "just checking"); | |
| 2561 BasicType type; | |
| 2562 if (a->is_objArray()) { | |
| 2563 type = T_OBJECT; | |
| 2564 } else { | |
| 2565 type = typeArrayKlass::cast(a->klass())->element_type(); | |
| 2566 } | |
| 2567 void* ret = arrayOop(a)->base(type); | |
| 2568 DTRACE_PROBE1(hotspot_jni, GetPrimitiveArrayCritical__return, ret); | |
| 2569 return ret; | |
| 2570 JNI_END | |
| 2571 | |
| 2572 | |
| 2573 JNI_ENTRY(void, jni_ReleasePrimitiveArrayCritical(JNIEnv *env, jarray array, void *carray, jint mode)) | |
| 2574 JNIWrapper("ReleasePrimitiveArrayCritical"); | |
| 2575 DTRACE_PROBE4(hotspot_jni, ReleasePrimitiveArrayCritical__entry, env, array, carray, mode); | |
| 2576 // The array, carray and mode arguments are ignored | |
| 2577 GC_locker::unlock_critical(thread); | |
| 2578 DTRACE_PROBE(hotspot_jni, ReleasePrimitiveArrayCritical__return); | |
| 2579 JNI_END | |
| 2580 | |
| 2581 | |
| 2582 JNI_ENTRY(const jchar*, jni_GetStringCritical(JNIEnv *env, jstring string, jboolean *isCopy)) | |
| 2583 JNIWrapper("GetStringCritical"); | |
| 2584 DTRACE_PROBE3(hotspot_jni, GetStringCritical__entry, env, string, isCopy); | |
| 2585 GC_locker::lock_critical(thread); | |
| 2586 if (isCopy != NULL) { | |
| 2587 *isCopy = JNI_FALSE; | |
| 2588 } | |
| 2589 oop s = JNIHandles::resolve_non_null(string); | |
| 2590 int s_len = java_lang_String::length(s); | |
| 2591 typeArrayOop s_value = java_lang_String::value(s); | |
| 2592 int s_offset = java_lang_String::offset(s); | |
| 2593 const jchar* ret; | |
| 2594 if (s_len > 0) { | |
| 2595 ret = s_value->char_at_addr(s_offset); | |
| 2596 } else { | |
| 2597 ret = (jchar*) s_value->base(T_CHAR); | |
| 2598 } | |
| 2599 DTRACE_PROBE1(hotspot_jni, GetStringCritical__return, ret); | |
| 2600 return ret; | |
| 2601 JNI_END | |
| 2602 | |
| 2603 | |
| 2604 JNI_ENTRY(void, jni_ReleaseStringCritical(JNIEnv *env, jstring str, const jchar *chars)) | |
| 2605 JNIWrapper("ReleaseStringCritical"); | |
| 2606 DTRACE_PROBE3(hotspot_jni, ReleaseStringCritical__entry, env, str, chars); | |
| 2607 // The str and chars arguments are ignored | |
| 2608 GC_locker::unlock_critical(thread); | |
| 2609 DTRACE_PROBE(hotspot_jni, ReleaseStringCritical__return); | |
| 2610 JNI_END | |
| 2611 | |
| 2612 | |
| 2613 JNI_ENTRY(jweak, jni_NewWeakGlobalRef(JNIEnv *env, jobject ref)) | |
| 2614 JNIWrapper("jni_NewWeakGlobalRef"); | |
| 2615 DTRACE_PROBE2(hotspot_jni, NewWeakGlobalRef__entry, env, ref); | |
| 2616 Handle ref_handle(thread, JNIHandles::resolve(ref)); | |
| 2617 jweak ret = JNIHandles::make_weak_global(ref_handle); | |
| 2618 DTRACE_PROBE1(hotspot_jni, NewWeakGlobalRef__return, ret); | |
| 2619 return ret; | |
| 2620 JNI_END | |
| 2621 | |
| 2622 // Must be JNI_ENTRY (with HandleMark) | |
| 2623 JNI_ENTRY(void, jni_DeleteWeakGlobalRef(JNIEnv *env, jweak ref)) | |
| 2624 JNIWrapper("jni_DeleteWeakGlobalRef"); | |
| 2625 DTRACE_PROBE2(hotspot_jni, DeleteWeakGlobalRef__entry, env, ref); | |
| 2626 JNIHandles::destroy_weak_global(ref); | |
| 2627 DTRACE_PROBE(hotspot_jni, DeleteWeakGlobalRef__return); | |
| 2628 JNI_END | |
| 2629 | |
| 2630 | |
| 2631 JNI_QUICK_ENTRY(jboolean, jni_ExceptionCheck(JNIEnv *env)) | |
| 2632 JNIWrapper("jni_ExceptionCheck"); | |
| 2633 DTRACE_PROBE1(hotspot_jni, ExceptionCheck__entry, env); | |
| 2634 jni_check_async_exceptions(thread); | |
| 2635 jboolean ret = (thread->has_pending_exception()) ? JNI_TRUE : JNI_FALSE; | |
| 2636 DTRACE_PROBE1(hotspot_jni, ExceptionCheck__return, ret); | |
| 2637 return ret; | |
| 2638 JNI_END | |
| 2639 | |
| 2640 | |
| 2641 // Initialization state for three routines below relating to | |
| 2642 // java.nio.DirectBuffers | |
| 2643 static jint directBufferSupportInitializeStarted = 0; | |
| 2644 static volatile jint directBufferSupportInitializeEnded = 0; | |
| 2645 static volatile jint directBufferSupportInitializeFailed = 0; | |
| 2646 static jclass bufferClass = NULL; | |
| 2647 static jclass directBufferClass = NULL; | |
| 2648 static jclass directByteBufferClass = NULL; | |
| 2649 static jmethodID directByteBufferConstructor = NULL; | |
| 2650 static jfieldID directBufferAddressField = NULL; | |
| 2651 static jfieldID bufferCapacityField = NULL; | |
| 2652 | |
| 2653 static jclass lookupOne(JNIEnv* env, const char* name, TRAPS) { | |
| 2654 Handle loader; // null (bootstrap) loader | |
| 2655 Handle protection_domain; // null protection domain | |
| 2656 | |
| 2657 symbolHandle sym = oopFactory::new_symbol_handle(name, CHECK_NULL); | |
|
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2658 jclass result = find_class_from_class_loader(env, sym, true, loader, protection_domain, true, CHECK_NULL); |
|
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|
2659 |
|
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|
2660 if (TraceClassResolution && result != NULL) { |
|
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|
2661 trace_class_resolution(java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(result))); |
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|
2662 } |
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|
2663 return result; |
| 0 | 2664 } |
| 2665 | |
| 2666 // These lookups are done with the NULL (bootstrap) ClassLoader to | |
| 2667 // circumvent any security checks that would be done by jni_FindClass. | |
| 2668 JNI_ENTRY(bool, lookupDirectBufferClasses(JNIEnv* env)) | |
| 2669 { | |
| 2670 if ((bufferClass = lookupOne(env, "java/nio/Buffer", thread)) == NULL) { return false; } | |
| 2671 if ((directBufferClass = lookupOne(env, "sun/nio/ch/DirectBuffer", thread)) == NULL) { return false; } | |
| 2672 if ((directByteBufferClass = lookupOne(env, "java/nio/DirectByteBuffer", thread)) == NULL) { return false; } | |
| 2673 return true; | |
| 2674 } | |
| 2675 JNI_END | |
| 2676 | |
| 2677 | |
| 2678 static bool initializeDirectBufferSupport(JNIEnv* env, JavaThread* thread) { | |
| 2679 if (directBufferSupportInitializeFailed) { | |
| 2680 return false; | |
| 2681 } | |
| 2682 | |
| 2683 if (Atomic::cmpxchg(1, &directBufferSupportInitializeStarted, 0) == 0) { | |
| 2684 if (!lookupDirectBufferClasses(env)) { | |
| 2685 directBufferSupportInitializeFailed = 1; | |
| 2686 return false; | |
| 2687 } | |
| 2688 | |
| 2689 // Make global references for these | |
| 2690 bufferClass = (jclass) env->NewGlobalRef(bufferClass); | |
| 2691 directBufferClass = (jclass) env->NewGlobalRef(directBufferClass); | |
| 2692 directByteBufferClass = (jclass) env->NewGlobalRef(directByteBufferClass); | |
| 2693 | |
| 2694 // Get needed field and method IDs | |
| 2695 directByteBufferConstructor = env->GetMethodID(directByteBufferClass, "<init>", "(JI)V"); | |
| 2696 directBufferAddressField = env->GetFieldID(bufferClass, "address", "J"); | |
| 2697 bufferCapacityField = env->GetFieldID(bufferClass, "capacity", "I"); | |
| 2698 | |
| 2699 if ((directByteBufferConstructor == NULL) || | |
| 2700 (directBufferAddressField == NULL) || | |
| 2701 (bufferCapacityField == NULL)) { | |
| 2702 directBufferSupportInitializeFailed = 1; | |
| 2703 return false; | |
| 2704 } | |
| 2705 | |
| 2706 directBufferSupportInitializeEnded = 1; | |
| 2707 } else { | |
| 2708 while (!directBufferSupportInitializeEnded && !directBufferSupportInitializeFailed) { | |
|
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|
2709 // Set state as yield_all can call os:sleep. On Solaris, yield_all calls |
|
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|
2710 // os::sleep which requires the VM state transition. On other platforms, it |
|
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|
2711 // is not necessary. The following call to change the VM state is purposely |
|
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|
2712 // put inside the loop to avoid potential deadlock when multiple threads |
|
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2713 // try to call this method. See 6791815 for more details. |
|
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|
2714 ThreadInVMfromNative tivn(thread); |
| 0 | 2715 os::yield_all(); |
| 2716 } | |
| 2717 } | |
| 2718 | |
| 2719 return !directBufferSupportInitializeFailed; | |
| 2720 } | |
| 2721 | |
| 2722 extern "C" jobject JNICALL jni_NewDirectByteBuffer(JNIEnv *env, void* address, jlong capacity) | |
| 2723 { | |
| 2724 // thread_from_jni_environment() will block if VM is gone. | |
| 2725 JavaThread* thread = JavaThread::thread_from_jni_environment(env); | |
| 2726 | |
| 2727 JNIWrapper("jni_NewDirectByteBuffer"); | |
| 2728 DTRACE_PROBE3(hotspot_jni, NewDirectByteBuffer__entry, env, address, capacity); | |
| 2729 | |
| 2730 if (!directBufferSupportInitializeEnded) { | |
| 2731 if (!initializeDirectBufferSupport(env, thread)) { | |
| 2732 DTRACE_PROBE1(hotspot_jni, NewDirectByteBuffer__return, NULL); | |
| 2733 return NULL; | |
| 2734 } | |
| 2735 } | |
| 2736 | |
| 2737 // Being paranoid about accidental sign extension on address | |
| 2738 jlong addr = (jlong) ((uintptr_t) address); | |
| 2739 // NOTE that package-private DirectByteBuffer constructor currently | |
| 2740 // takes int capacity | |
| 2741 jint cap = (jint) capacity; | |
| 2742 jobject ret = env->NewObject(directByteBufferClass, directByteBufferConstructor, addr, cap); | |
| 2743 DTRACE_PROBE1(hotspot_jni, NewDirectByteBuffer__return, ret); | |
| 2744 return ret; | |
| 2745 } | |
| 2746 | |
| 2747 DT_RETURN_MARK_DECL(GetDirectBufferAddress, void*); | |
| 2748 | |
| 2749 extern "C" void* JNICALL jni_GetDirectBufferAddress(JNIEnv *env, jobject buf) | |
| 2750 { | |
| 2751 // thread_from_jni_environment() will block if VM is gone. | |
| 2752 JavaThread* thread = JavaThread::thread_from_jni_environment(env); | |
| 2753 | |
| 2754 JNIWrapper("jni_GetDirectBufferAddress"); | |
| 2755 DTRACE_PROBE2(hotspot_jni, GetDirectBufferAddress__entry, env, buf); | |
| 2756 void* ret = NULL; | |
| 2757 DT_RETURN_MARK(GetDirectBufferAddress, void*, (const void*&)ret); | |
| 2758 | |
| 2759 if (!directBufferSupportInitializeEnded) { | |
| 2760 if (!initializeDirectBufferSupport(env, thread)) { | |
| 2761 return 0; | |
| 2762 } | |
| 2763 } | |
| 2764 | |
| 2765 if ((buf != NULL) && (!env->IsInstanceOf(buf, directBufferClass))) { | |
| 2766 return 0; | |
| 2767 } | |
| 2768 | |
| 2769 ret = (void*)(intptr_t)env->GetLongField(buf, directBufferAddressField); | |
| 2770 return ret; | |
| 2771 } | |
| 2772 | |
| 2773 DT_RETURN_MARK_DECL(GetDirectBufferCapacity, jlong); | |
| 2774 | |
| 2775 extern "C" jlong JNICALL jni_GetDirectBufferCapacity(JNIEnv *env, jobject buf) | |
| 2776 { | |
| 2777 // thread_from_jni_environment() will block if VM is gone. | |
| 2778 JavaThread* thread = JavaThread::thread_from_jni_environment(env); | |
| 2779 | |
| 2780 JNIWrapper("jni_GetDirectBufferCapacity"); | |
| 2781 DTRACE_PROBE2(hotspot_jni, GetDirectBufferCapacity__entry, env, buf); | |
| 2782 jlong ret = -1; | |
| 2783 DT_RETURN_MARK(GetDirectBufferCapacity, jlong, (const jlong&)ret); | |
| 2784 | |
| 2785 if (!directBufferSupportInitializeEnded) { | |
| 2786 if (!initializeDirectBufferSupport(env, thread)) { | |
| 2787 ret = 0; | |
| 2788 return ret; | |
| 2789 } | |
| 2790 } | |
| 2791 | |
| 2792 if (buf == NULL) { | |
| 2793 return -1; | |
| 2794 } | |
| 2795 | |
| 2796 if (!env->IsInstanceOf(buf, directBufferClass)) { | |
| 2797 return -1; | |
| 2798 } | |
| 2799 | |
| 2800 // NOTE that capacity is currently an int in the implementation | |
| 2801 ret = env->GetIntField(buf, bufferCapacityField); | |
| 2802 return ret; | |
| 2803 } | |
| 2804 | |
| 2805 | |
| 2806 JNI_LEAF(jint, jni_GetVersion(JNIEnv *env)) | |
| 2807 JNIWrapper("GetVersion"); | |
| 2808 DTRACE_PROBE1(hotspot_jni, GetVersion__entry, env); | |
| 2809 DTRACE_PROBE1(hotspot_jni, GetVersion__return, CurrentVersion); | |
| 2810 return CurrentVersion; | |
| 2811 JNI_END | |
| 2812 | |
| 2813 extern struct JavaVM_ main_vm; | |
| 2814 | |
| 2815 JNI_LEAF(jint, jni_GetJavaVM(JNIEnv *env, JavaVM **vm)) | |
| 2816 JNIWrapper("jni_GetJavaVM"); | |
| 2817 DTRACE_PROBE2(hotspot_jni, GetJavaVM__entry, env, vm); | |
| 2818 *vm = (JavaVM *)(&main_vm); | |
| 2819 DTRACE_PROBE1(hotspot_jni, GetJavaVM__return, JNI_OK); | |
| 2820 return JNI_OK; | |
| 2821 JNI_END | |
| 2822 | |
| 2823 // Structure containing all jni functions | |
| 2824 struct JNINativeInterface_ jni_NativeInterface = { | |
| 2825 NULL, | |
| 2826 NULL, | |
| 2827 NULL, | |
| 2828 | |
| 2829 NULL, | |
| 2830 | |
| 2831 jni_GetVersion, | |
| 2832 | |
| 2833 jni_DefineClass, | |
| 2834 jni_FindClass, | |
| 2835 | |
| 2836 jni_FromReflectedMethod, | |
| 2837 jni_FromReflectedField, | |
| 2838 | |
| 2839 jni_ToReflectedMethod, | |
| 2840 | |
| 2841 jni_GetSuperclass, | |
| 2842 jni_IsAssignableFrom, | |
| 2843 | |
| 2844 jni_ToReflectedField, | |
| 2845 | |
| 2846 jni_Throw, | |
| 2847 jni_ThrowNew, | |
| 2848 jni_ExceptionOccurred, | |
| 2849 jni_ExceptionDescribe, | |
| 2850 jni_ExceptionClear, | |
| 2851 jni_FatalError, | |
| 2852 | |
| 2853 jni_PushLocalFrame, | |
| 2854 jni_PopLocalFrame, | |
| 2855 | |
| 2856 jni_NewGlobalRef, | |
| 2857 jni_DeleteGlobalRef, | |
| 2858 jni_DeleteLocalRef, | |
| 2859 jni_IsSameObject, | |
| 2860 | |
| 2861 jni_NewLocalRef, | |
| 2862 jni_EnsureLocalCapacity, | |
| 2863 | |
| 2864 jni_AllocObject, | |
| 2865 jni_NewObject, | |
| 2866 jni_NewObjectV, | |
| 2867 jni_NewObjectA, | |
| 2868 | |
| 2869 jni_GetObjectClass, | |
| 2870 jni_IsInstanceOf, | |
| 2871 | |
| 2872 jni_GetMethodID, | |
| 2873 | |
| 2874 jni_CallObjectMethod, | |
| 2875 jni_CallObjectMethodV, | |
| 2876 jni_CallObjectMethodA, | |
| 2877 jni_CallBooleanMethod, | |
| 2878 jni_CallBooleanMethodV, | |
| 2879 jni_CallBooleanMethodA, | |
| 2880 jni_CallByteMethod, | |
| 2881 jni_CallByteMethodV, | |
| 2882 jni_CallByteMethodA, | |
| 2883 jni_CallCharMethod, | |
| 2884 jni_CallCharMethodV, | |
| 2885 jni_CallCharMethodA, | |
| 2886 jni_CallShortMethod, | |
| 2887 jni_CallShortMethodV, | |
| 2888 jni_CallShortMethodA, | |
| 2889 jni_CallIntMethod, | |
| 2890 jni_CallIntMethodV, | |
| 2891 jni_CallIntMethodA, | |
| 2892 jni_CallLongMethod, | |
| 2893 jni_CallLongMethodV, | |
| 2894 jni_CallLongMethodA, | |
| 2895 jni_CallFloatMethod, | |
| 2896 jni_CallFloatMethodV, | |
| 2897 jni_CallFloatMethodA, | |
| 2898 jni_CallDoubleMethod, | |
| 2899 jni_CallDoubleMethodV, | |
| 2900 jni_CallDoubleMethodA, | |
| 2901 jni_CallVoidMethod, | |
| 2902 jni_CallVoidMethodV, | |
| 2903 jni_CallVoidMethodA, | |
| 2904 | |
| 2905 jni_CallNonvirtualObjectMethod, | |
| 2906 jni_CallNonvirtualObjectMethodV, | |
| 2907 jni_CallNonvirtualObjectMethodA, | |
| 2908 jni_CallNonvirtualBooleanMethod, | |
| 2909 jni_CallNonvirtualBooleanMethodV, | |
| 2910 jni_CallNonvirtualBooleanMethodA, | |
| 2911 jni_CallNonvirtualByteMethod, | |
| 2912 jni_CallNonvirtualByteMethodV, | |
| 2913 jni_CallNonvirtualByteMethodA, | |
| 2914 jni_CallNonvirtualCharMethod, | |
| 2915 jni_CallNonvirtualCharMethodV, | |
| 2916 jni_CallNonvirtualCharMethodA, | |
| 2917 jni_CallNonvirtualShortMethod, | |
| 2918 jni_CallNonvirtualShortMethodV, | |
| 2919 jni_CallNonvirtualShortMethodA, | |
| 2920 jni_CallNonvirtualIntMethod, | |
| 2921 jni_CallNonvirtualIntMethodV, | |
| 2922 jni_CallNonvirtualIntMethodA, | |
| 2923 jni_CallNonvirtualLongMethod, | |
| 2924 jni_CallNonvirtualLongMethodV, | |
| 2925 jni_CallNonvirtualLongMethodA, | |
| 2926 jni_CallNonvirtualFloatMethod, | |
| 2927 jni_CallNonvirtualFloatMethodV, | |
| 2928 jni_CallNonvirtualFloatMethodA, | |
| 2929 jni_CallNonvirtualDoubleMethod, | |
| 2930 jni_CallNonvirtualDoubleMethodV, | |
| 2931 jni_CallNonvirtualDoubleMethodA, | |
| 2932 jni_CallNonvirtualVoidMethod, | |
| 2933 jni_CallNonvirtualVoidMethodV, | |
| 2934 jni_CallNonvirtualVoidMethodA, | |
| 2935 | |
| 2936 jni_GetFieldID, | |
| 2937 | |
| 2938 jni_GetObjectField, | |
| 2939 jni_GetBooleanField, | |
| 2940 jni_GetByteField, | |
| 2941 jni_GetCharField, | |
| 2942 jni_GetShortField, | |
| 2943 jni_GetIntField, | |
| 2944 jni_GetLongField, | |
| 2945 jni_GetFloatField, | |
| 2946 jni_GetDoubleField, | |
| 2947 | |
| 2948 jni_SetObjectField, | |
| 2949 jni_SetBooleanField, | |
| 2950 jni_SetByteField, | |
| 2951 jni_SetCharField, | |
| 2952 jni_SetShortField, | |
| 2953 jni_SetIntField, | |
| 2954 jni_SetLongField, | |
| 2955 jni_SetFloatField, | |
| 2956 jni_SetDoubleField, | |
| 2957 | |
| 2958 jni_GetStaticMethodID, | |
| 2959 | |
| 2960 jni_CallStaticObjectMethod, | |
| 2961 jni_CallStaticObjectMethodV, | |
| 2962 jni_CallStaticObjectMethodA, | |
| 2963 jni_CallStaticBooleanMethod, | |
| 2964 jni_CallStaticBooleanMethodV, | |
| 2965 jni_CallStaticBooleanMethodA, | |
| 2966 jni_CallStaticByteMethod, | |
| 2967 jni_CallStaticByteMethodV, | |
| 2968 jni_CallStaticByteMethodA, | |
| 2969 jni_CallStaticCharMethod, | |
| 2970 jni_CallStaticCharMethodV, | |
| 2971 jni_CallStaticCharMethodA, | |
| 2972 jni_CallStaticShortMethod, | |
| 2973 jni_CallStaticShortMethodV, | |
| 2974 jni_CallStaticShortMethodA, | |
| 2975 jni_CallStaticIntMethod, | |
| 2976 jni_CallStaticIntMethodV, | |
| 2977 jni_CallStaticIntMethodA, | |
| 2978 jni_CallStaticLongMethod, | |
| 2979 jni_CallStaticLongMethodV, | |
| 2980 jni_CallStaticLongMethodA, | |
| 2981 jni_CallStaticFloatMethod, | |
| 2982 jni_CallStaticFloatMethodV, | |
| 2983 jni_CallStaticFloatMethodA, | |
| 2984 jni_CallStaticDoubleMethod, | |
| 2985 jni_CallStaticDoubleMethodV, | |
| 2986 jni_CallStaticDoubleMethodA, | |
| 2987 jni_CallStaticVoidMethod, | |
| 2988 jni_CallStaticVoidMethodV, | |
| 2989 jni_CallStaticVoidMethodA, | |
| 2990 | |
| 2991 jni_GetStaticFieldID, | |
| 2992 | |
| 2993 jni_GetStaticObjectField, | |
| 2994 jni_GetStaticBooleanField, | |
| 2995 jni_GetStaticByteField, | |
| 2996 jni_GetStaticCharField, | |
| 2997 jni_GetStaticShortField, | |
| 2998 jni_GetStaticIntField, | |
| 2999 jni_GetStaticLongField, | |
| 3000 jni_GetStaticFloatField, | |
| 3001 jni_GetStaticDoubleField, | |
| 3002 | |
| 3003 jni_SetStaticObjectField, | |
| 3004 jni_SetStaticBooleanField, | |
| 3005 jni_SetStaticByteField, | |
| 3006 jni_SetStaticCharField, | |
| 3007 jni_SetStaticShortField, | |
| 3008 jni_SetStaticIntField, | |
| 3009 jni_SetStaticLongField, | |
| 3010 jni_SetStaticFloatField, | |
| 3011 jni_SetStaticDoubleField, | |
| 3012 | |
| 3013 jni_NewString, | |
| 3014 jni_GetStringLength, | |
| 3015 jni_GetStringChars, | |
| 3016 jni_ReleaseStringChars, | |
| 3017 | |
| 3018 jni_NewStringUTF, | |
| 3019 jni_GetStringUTFLength, | |
| 3020 jni_GetStringUTFChars, | |
| 3021 jni_ReleaseStringUTFChars, | |
| 3022 | |
| 3023 jni_GetArrayLength, | |
| 3024 | |
| 3025 jni_NewObjectArray, | |
| 3026 jni_GetObjectArrayElement, | |
| 3027 jni_SetObjectArrayElement, | |
| 3028 | |
| 3029 jni_NewBooleanArray, | |
| 3030 jni_NewByteArray, | |
| 3031 jni_NewCharArray, | |
| 3032 jni_NewShortArray, | |
| 3033 jni_NewIntArray, | |
| 3034 jni_NewLongArray, | |
| 3035 jni_NewFloatArray, | |
| 3036 jni_NewDoubleArray, | |
| 3037 | |
| 3038 jni_GetBooleanArrayElements, | |
| 3039 jni_GetByteArrayElements, | |
| 3040 jni_GetCharArrayElements, | |
| 3041 jni_GetShortArrayElements, | |
| 3042 jni_GetIntArrayElements, | |
| 3043 jni_GetLongArrayElements, | |
| 3044 jni_GetFloatArrayElements, | |
| 3045 jni_GetDoubleArrayElements, | |
| 3046 | |
| 3047 jni_ReleaseBooleanArrayElements, | |
| 3048 jni_ReleaseByteArrayElements, | |
| 3049 jni_ReleaseCharArrayElements, | |
| 3050 jni_ReleaseShortArrayElements, | |
| 3051 jni_ReleaseIntArrayElements, | |
| 3052 jni_ReleaseLongArrayElements, | |
| 3053 jni_ReleaseFloatArrayElements, | |
| 3054 jni_ReleaseDoubleArrayElements, | |
| 3055 | |
| 3056 jni_GetBooleanArrayRegion, | |
| 3057 jni_GetByteArrayRegion, | |
| 3058 jni_GetCharArrayRegion, | |
| 3059 jni_GetShortArrayRegion, | |
| 3060 jni_GetIntArrayRegion, | |
| 3061 jni_GetLongArrayRegion, | |
| 3062 jni_GetFloatArrayRegion, | |
| 3063 jni_GetDoubleArrayRegion, | |
| 3064 | |
| 3065 jni_SetBooleanArrayRegion, | |
| 3066 jni_SetByteArrayRegion, | |
| 3067 jni_SetCharArrayRegion, | |
| 3068 jni_SetShortArrayRegion, | |
| 3069 jni_SetIntArrayRegion, | |
| 3070 jni_SetLongArrayRegion, | |
| 3071 jni_SetFloatArrayRegion, | |
| 3072 jni_SetDoubleArrayRegion, | |
| 3073 | |
| 3074 jni_RegisterNatives, | |
| 3075 jni_UnregisterNatives, | |
| 3076 | |
| 3077 jni_MonitorEnter, | |
| 3078 jni_MonitorExit, | |
| 3079 | |
| 3080 jni_GetJavaVM, | |
| 3081 | |
| 3082 jni_GetStringRegion, | |
| 3083 jni_GetStringUTFRegion, | |
| 3084 | |
| 3085 jni_GetPrimitiveArrayCritical, | |
| 3086 jni_ReleasePrimitiveArrayCritical, | |
| 3087 | |
| 3088 jni_GetStringCritical, | |
| 3089 jni_ReleaseStringCritical, | |
| 3090 | |
| 3091 jni_NewWeakGlobalRef, | |
| 3092 jni_DeleteWeakGlobalRef, | |
| 3093 | |
| 3094 jni_ExceptionCheck, | |
| 3095 | |
| 3096 jni_NewDirectByteBuffer, | |
| 3097 jni_GetDirectBufferAddress, | |
| 3098 jni_GetDirectBufferCapacity, | |
| 3099 | |
| 3100 // New 1_6 features | |
| 3101 | |
| 3102 jni_GetObjectRefType | |
| 3103 }; | |
| 3104 | |
| 3105 | |
| 3106 // For jvmti use to modify jni function table. | |
| 3107 // Java threads in native contiues to run until it is transitioned | |
| 3108 // to VM at safepoint. Before the transition or before it is blocked | |
| 3109 // for safepoint it may access jni function table. VM could crash if | |
| 3110 // any java thread access the jni function table in the middle of memcpy. | |
| 3111 // To avoid this each function pointers are copied automically. | |
| 3112 void copy_jni_function_table(const struct JNINativeInterface_ *new_jni_NativeInterface) { | |
| 3113 assert(SafepointSynchronize::is_at_safepoint(), "must be at safepoint"); | |
| 3114 intptr_t *a = (intptr_t *) jni_functions(); | |
| 3115 intptr_t *b = (intptr_t *) new_jni_NativeInterface; | |
| 3116 for (uint i=0; i < sizeof(struct JNINativeInterface_)/sizeof(void *); i++) { | |
| 3117 Atomic::store_ptr(*b++, a++); | |
| 3118 } | |
| 3119 } | |
| 3120 | |
| 3121 void quicken_jni_functions() { | |
| 3122 // Replace Get<Primitive>Field with fast versions | |
| 3123 if (UseFastJNIAccessors && !JvmtiExport::can_post_field_access() | |
| 3124 && !VerifyJNIFields && !TraceJNICalls && !CountJNICalls && !CheckJNICalls | |
| 3125 #if defined(_WINDOWS) && defined(IA32) && defined(COMPILER2) | |
| 3126 // windows x86 currently needs SEH wrapper and the gain of the fast | |
| 3127 // versions currently isn't certain for server vm on uniprocessor. | |
| 3128 && os::is_MP() | |
| 3129 #endif | |
| 3130 ) { | |
| 3131 address func; | |
| 3132 func = JNI_FastGetField::generate_fast_get_boolean_field(); | |
| 3133 if (func != (address)-1) { | |
| 3134 jni_NativeInterface.GetBooleanField = (GetBooleanField_t)func; | |
| 3135 } | |
| 3136 func = JNI_FastGetField::generate_fast_get_byte_field(); | |
| 3137 if (func != (address)-1) { | |
| 3138 jni_NativeInterface.GetByteField = (GetByteField_t)func; | |
| 3139 } | |
| 3140 func = JNI_FastGetField::generate_fast_get_char_field(); | |
| 3141 if (func != (address)-1) { | |
| 3142 jni_NativeInterface.GetCharField = (GetCharField_t)func; | |
| 3143 } | |
| 3144 func = JNI_FastGetField::generate_fast_get_short_field(); | |
| 3145 if (func != (address)-1) { | |
| 3146 jni_NativeInterface.GetShortField = (GetShortField_t)func; | |
| 3147 } | |
| 3148 func = JNI_FastGetField::generate_fast_get_int_field(); | |
| 3149 if (func != (address)-1) { | |
| 3150 jni_NativeInterface.GetIntField = (GetIntField_t)func; | |
| 3151 } | |
| 3152 func = JNI_FastGetField::generate_fast_get_long_field(); | |
| 3153 if (func != (address)-1) { | |
| 3154 jni_NativeInterface.GetLongField = (GetLongField_t)func; | |
| 3155 } | |
| 3156 func = JNI_FastGetField::generate_fast_get_float_field(); | |
| 3157 if (func != (address)-1) { | |
| 3158 jni_NativeInterface.GetFloatField = (GetFloatField_t)func; | |
| 3159 } | |
| 3160 func = JNI_FastGetField::generate_fast_get_double_field(); | |
| 3161 if (func != (address)-1) { | |
| 3162 jni_NativeInterface.GetDoubleField = (GetDoubleField_t)func; | |
| 3163 } | |
| 3164 } | |
| 3165 } | |
| 3166 | |
| 3167 // Returns the function structure | |
| 3168 struct JNINativeInterface_* jni_functions() { | |
| 3169 #ifndef JNICHECK_KERNEL | |
| 3170 if (CheckJNICalls) return jni_functions_check(); | |
| 3171 #else // JNICHECK_KERNEL | |
| 3172 if (CheckJNICalls) warning("-Xcheck:jni is not supported in kernel vm."); | |
| 3173 #endif // JNICHECK_KERNEL | |
| 3174 return &jni_NativeInterface; | |
| 3175 } | |
| 3176 | |
| 3177 // Returns the function structure | |
| 3178 struct JNINativeInterface_* jni_functions_nocheck() { | |
| 3179 return &jni_NativeInterface; | |
| 3180 } | |
| 3181 | |
| 3182 | |
| 3183 // Invocation API | |
| 3184 | |
| 3185 | |
| 3186 // Forward declaration | |
| 3187 extern const struct JNIInvokeInterface_ jni_InvokeInterface; | |
| 3188 | |
| 3189 // Global invocation API vars | |
| 3190 volatile jint vm_created = 0; | |
| 3191 // Indicate whether it is safe to recreate VM | |
| 3192 volatile jint safe_to_recreate_vm = 1; | |
| 3193 struct JavaVM_ main_vm = {&jni_InvokeInterface}; | |
| 3194 | |
| 3195 | |
| 3196 #define JAVASTACKSIZE (400 * 1024) /* Default size of a thread java stack */ | |
| 3197 #define PROCSTACKSIZE 0 /* 0 means default size in HPI */ | |
| 3198 enum { VERIFY_NONE, VERIFY_REMOTE, VERIFY_ALL }; | |
| 3199 | |
| 3200 HS_DTRACE_PROBE_DECL1(hotspot_jni, GetDefaultJavaVMInitArgs__entry, void*); | |
| 3201 DT_RETURN_MARK_DECL(GetDefaultJavaVMInitArgs, jint); | |
| 3202 | |
| 3203 _JNI_IMPORT_OR_EXPORT_ jint JNICALL JNI_GetDefaultJavaVMInitArgs(void *args_) { | |
| 3204 HS_DTRACE_PROBE1(hotspot_jni, GetDefaultJavaVMInitArgs__entry, args_); | |
| 3205 JDK1_1InitArgs *args = (JDK1_1InitArgs *)args_; | |
| 3206 jint ret = JNI_ERR; | |
| 3207 DT_RETURN_MARK(GetDefaultJavaVMInitArgs, jint, (const jint&)ret); | |
| 3208 | |
| 3209 if (Threads::is_supported_jni_version(args->version)) { | |
| 3210 ret = JNI_OK; | |
| 3211 } | |
| 3212 // 1.1 style no longer supported in hotspot. | |
| 3213 // According the JNI spec, we should update args->version on return. | |
| 3214 // We also use the structure to communicate with launcher about default | |
| 3215 // stack size. | |
| 3216 if (args->version == JNI_VERSION_1_1) { | |
| 3217 args->version = JNI_VERSION_1_2; | |
| 3218 // javaStackSize is int in arguments structure | |
| 3219 assert(jlong(ThreadStackSize) * K < INT_MAX, "integer overflow"); | |
| 3220 args->javaStackSize = (jint)(ThreadStackSize * K); | |
| 3221 } | |
| 3222 return ret; | |
| 3223 } | |
| 3224 | |
| 3225 HS_DTRACE_PROBE_DECL3(hotspot_jni, CreateJavaVM__entry, vm, penv, args); | |
| 3226 DT_RETURN_MARK_DECL(CreateJavaVM, jint); | |
| 3227 | |
| 3228 _JNI_IMPORT_OR_EXPORT_ jint JNICALL JNI_CreateJavaVM(JavaVM **vm, void **penv, void *args) { | |
| 3229 HS_DTRACE_PROBE3(hotspot_jni, CreateJavaVM__entry, vm, penv, args); | |
| 3230 | |
| 3231 jint result = JNI_ERR; | |
| 3232 DT_RETURN_MARK(CreateJavaVM, jint, (const jint&)result); | |
| 3233 | |
| 3234 // At the moment it's only possible to have one Java VM, | |
| 3235 // since some of the runtime state is in global variables. | |
| 3236 | |
| 3237 // We cannot use our mutex locks here, since they only work on | |
| 3238 // Threads. We do an atomic compare and exchange to ensure only | |
| 3239 // one thread can call this method at a time | |
| 3240 | |
| 3241 // We use Atomic::xchg rather than Atomic::add/dec since on some platforms | |
| 3242 // the add/dec implementations are dependent on whether we are running | |
| 3243 // on a multiprocessor, and at this stage of initialization the os::is_MP | |
| 3244 // function used to determine this will always return false. Atomic::xchg | |
| 3245 // does not have this problem. | |
| 3246 if (Atomic::xchg(1, &vm_created) == 1) { | |
| 3247 return JNI_ERR; // already created, or create attempt in progress | |
| 3248 } | |
| 3249 if (Atomic::xchg(0, &safe_to_recreate_vm) == 0) { | |
| 3250 return JNI_ERR; // someone tried and failed and retry not allowed. | |
| 3251 } | |
| 3252 | |
| 3253 assert(vm_created == 1, "vm_created is true during the creation"); | |
| 3254 | |
| 3255 /** | |
| 3256 * Certain errors during initialization are recoverable and do not | |
| 3257 * prevent this method from being called again at a later time | |
| 3258 * (perhaps with different arguments). However, at a certain | |
| 3259 * point during initialization if an error occurs we cannot allow | |
| 3260 * this function to be called again (or it will crash). In those | |
| 3261 * situations, the 'canTryAgain' flag is set to false, which atomically | |
| 3262 * sets safe_to_recreate_vm to 1, such that any new call to | |
| 3263 * JNI_CreateJavaVM will immediately fail using the above logic. | |
| 3264 */ | |
| 3265 bool can_try_again = true; | |
| 3266 | |
| 3267 result = Threads::create_vm((JavaVMInitArgs*) args, &can_try_again); | |
| 3268 if (result == JNI_OK) { | |
| 3269 JavaThread *thread = JavaThread::current(); | |
| 3270 /* thread is thread_in_vm here */ | |
| 3271 *vm = (JavaVM *)(&main_vm); | |
| 3272 *(JNIEnv**)penv = thread->jni_environment(); | |
| 3273 | |
| 3274 // Tracks the time application was running before GC | |
| 3275 RuntimeService::record_application_start(); | |
| 3276 | |
| 3277 // Notify JVMTI | |
| 3278 if (JvmtiExport::should_post_thread_life()) { | |
| 3279 JvmtiExport::post_thread_start(thread); | |
| 3280 } | |
| 3281 // Check if we should compile all classes on bootclasspath | |
| 3282 NOT_PRODUCT(if (CompileTheWorld) ClassLoader::compile_the_world();) | |
| 3283 // Since this is not a JVM_ENTRY we have to set the thread state manually before leaving. | |
| 3284 ThreadStateTransition::transition_and_fence(thread, _thread_in_vm, _thread_in_native); | |
| 3285 } else { | |
| 3286 if (can_try_again) { | |
| 3287 // reset safe_to_recreate_vm to 1 so that retrial would be possible | |
| 3288 safe_to_recreate_vm = 1; | |
| 3289 } | |
| 3290 | |
| 3291 // Creation failed. We must reset vm_created | |
| 3292 *vm = 0; | |
| 3293 *(JNIEnv**)penv = 0; | |
| 3294 // reset vm_created last to avoid race condition. Use OrderAccess to | |
| 3295 // control both compiler and architectural-based reordering. | |
| 3296 OrderAccess::release_store(&vm_created, 0); | |
| 3297 } | |
| 3298 | |
| 3299 return result; | |
| 3300 } | |
| 3301 | |
| 3302 HS_DTRACE_PROBE_DECL3(hotspot_jni, GetCreatedJavaVMs__entry, \ | |
| 3303 JavaVM**, jsize, jsize*); | |
| 3304 HS_DTRACE_PROBE_DECL1(hotspot_jni, GetCreatedJavaVMs__return, jint); | |
| 3305 | |
| 3306 _JNI_IMPORT_OR_EXPORT_ jint JNICALL JNI_GetCreatedJavaVMs(JavaVM **vm_buf, jsize bufLen, jsize *numVMs) { | |
| 3307 // See bug 4367188, the wrapper can sometimes cause VM crashes | |
| 3308 // JNIWrapper("GetCreatedJavaVMs"); | |
| 3309 HS_DTRACE_PROBE3(hotspot_jni, GetCreatedJavaVMs__entry, \ | |
| 3310 vm_buf, bufLen, numVMs); | |
| 3311 if (vm_created) { | |
| 3312 if (numVMs != NULL) *numVMs = 1; | |
| 3313 if (bufLen > 0) *vm_buf = (JavaVM *)(&main_vm); | |
| 3314 } else { | |
| 3315 if (numVMs != NULL) *numVMs = 0; | |
| 3316 } | |
| 3317 HS_DTRACE_PROBE1(hotspot_jni, GetCreatedJavaVMs__return, JNI_OK); | |
| 3318 return JNI_OK; | |
| 3319 } | |
| 3320 | |
| 3321 extern "C" { | |
| 3322 | |
| 3323 DT_RETURN_MARK_DECL(DestroyJavaVM, jint); | |
| 3324 | |
| 3325 jint JNICALL jni_DestroyJavaVM(JavaVM *vm) { | |
| 3326 DTRACE_PROBE1(hotspot_jni, DestroyJavaVM__entry, vm); | |
| 3327 jint res = JNI_ERR; | |
| 3328 DT_RETURN_MARK(DestroyJavaVM, jint, (const jint&)res); | |
| 3329 | |
| 3330 if (!vm_created) { | |
| 3331 res = JNI_ERR; | |
| 3332 return res; | |
| 3333 } | |
| 3334 | |
| 3335 JNIWrapper("DestroyJavaVM"); | |
| 3336 JNIEnv *env; | |
| 3337 JavaVMAttachArgs destroyargs; | |
| 3338 destroyargs.version = CurrentVersion; | |
| 3339 destroyargs.name = (char *)"DestroyJavaVM"; | |
| 3340 destroyargs.group = NULL; | |
| 3341 res = vm->AttachCurrentThread((void **)&env, (void *)&destroyargs); | |
| 3342 if (res != JNI_OK) { | |
| 3343 return res; | |
| 3344 } | |
| 3345 | |
| 3346 // Since this is not a JVM_ENTRY we have to set the thread state manually before entering. | |
| 3347 JavaThread* thread = JavaThread::current(); | |
| 3348 ThreadStateTransition::transition_from_native(thread, _thread_in_vm); | |
| 3349 if (Threads::destroy_vm()) { | |
| 3350 // Should not change thread state, VM is gone | |
| 3351 vm_created = false; | |
| 3352 res = JNI_OK; | |
| 3353 return res; | |
| 3354 } else { | |
| 3355 ThreadStateTransition::transition_and_fence(thread, _thread_in_vm, _thread_in_native); | |
| 3356 res = JNI_ERR; | |
| 3357 return res; | |
| 3358 } | |
| 3359 } | |
| 3360 | |
| 3361 | |
| 3362 static jint attach_current_thread(JavaVM *vm, void **penv, void *_args, bool daemon) { | |
| 3363 JavaVMAttachArgs *args = (JavaVMAttachArgs *) _args; | |
| 3364 | |
| 3365 // Check below commented out from JDK1.2fcs as well | |
| 3366 /* | |
| 3367 if (args && (args->version != JNI_VERSION_1_1 || args->version != JNI_VERSION_1_2)) { | |
| 3368 return JNI_EVERSION; | |
| 3369 } | |
| 3370 */ | |
| 3371 | |
| 3372 Thread* t = ThreadLocalStorage::get_thread_slow(); | |
| 3373 if (t != NULL) { | |
| 3374 // If the thread has been attached this operation is a no-op | |
| 3375 *(JNIEnv**)penv = ((JavaThread*) t)->jni_environment(); | |
| 3376 return JNI_OK; | |
| 3377 } | |
| 3378 | |
| 3379 // Create a thread and mark it as attaching so it will be skipped by the | |
| 3380 // ThreadsListEnumerator - see CR 6404306 | |
| 3381 JavaThread* thread = new JavaThread(true); | |
| 3382 | |
| 3383 // Set correct safepoint info. The thread is going to call into Java when | |
| 3384 // initializing the Java level thread object. Hence, the correct state must | |
| 3385 // be set in order for the Safepoint code to deal with it correctly. | |
| 3386 thread->set_thread_state(_thread_in_vm); | |
| 3387 // Must do this before initialize_thread_local_storage | |
| 3388 thread->record_stack_base_and_size(); | |
| 3389 thread->initialize_thread_local_storage(); | |
| 3390 | |
| 3391 if (!os::create_attached_thread(thread)) { | |
| 3392 delete thread; | |
| 3393 return JNI_ERR; | |
| 3394 } | |
| 3395 thread->initialize_tlab(); | |
| 3396 | |
| 3397 // Crucial that we do not have a safepoint check for this thread, since it has | |
| 3398 // not been added to the Thread list yet. | |
| 3399 { Threads_lock->lock_without_safepoint_check(); | |
| 3400 // This must be inside this lock in order to get FullGCALot to work properly, i.e., to | |
| 3401 // avoid this thread trying to do a GC before it is added to the thread-list | |
| 3402 thread->set_active_handles(JNIHandleBlock::allocate_block()); | |
| 3403 Threads::add(thread, daemon); | |
| 3404 Threads_lock->unlock(); | |
| 3405 } | |
| 3406 // Create thread group and name info from attach arguments | |
| 3407 oop group = NULL; | |
| 3408 char* thread_name = NULL; | |
| 3409 if (args != NULL && Threads::is_supported_jni_version(args->version)) { | |
| 3410 group = JNIHandles::resolve(args->group); | |
| 3411 thread_name = args->name; // may be NULL | |
| 3412 } | |
| 3413 if (group == NULL) group = Universe::main_thread_group(); | |
| 3414 | |
| 3415 // Create Java level thread object and attach it to this thread | |
| 3416 bool attach_failed = false; | |
| 3417 { | |
| 3418 EXCEPTION_MARK; | |
| 3419 HandleMark hm(THREAD); | |
| 3420 Handle thread_group(THREAD, group); | |
| 3421 thread->allocate_threadObj(thread_group, thread_name, daemon, THREAD); | |
| 3422 if (HAS_PENDING_EXCEPTION) { | |
| 3423 CLEAR_PENDING_EXCEPTION; | |
| 3424 // cleanup outside the handle mark. | |
| 3425 attach_failed = true; | |
| 3426 } | |
| 3427 } | |
| 3428 | |
| 3429 if (attach_failed) { | |
| 3430 // Added missing cleanup | |
| 3431 thread->cleanup_failed_attach_current_thread(); | |
| 3432 return JNI_ERR; | |
| 3433 } | |
| 3434 | |
| 3435 // mark the thread as no longer attaching | |
| 3436 // this uses a fence to push the change through so we don't have | |
| 3437 // to regrab the threads_lock | |
| 3438 thread->set_attached(); | |
| 3439 | |
| 3440 // Enable stack overflow checks | |
| 3441 thread->create_stack_guard_pages(); | |
| 3442 | |
| 3443 // Set java thread status. | |
| 3444 java_lang_Thread::set_thread_status(thread->threadObj(), | |
| 3445 java_lang_Thread::RUNNABLE); | |
| 3446 | |
| 3447 // Notify the debugger | |
| 3448 if (JvmtiExport::should_post_thread_life()) { | |
| 3449 JvmtiExport::post_thread_start(thread); | |
| 3450 } | |
| 3451 | |
| 3452 *(JNIEnv**)penv = thread->jni_environment(); | |
| 3453 | |
| 3454 // Now leaving the VM, so change thread_state. This is normally automatically taken care | |
| 3455 // of in the JVM_ENTRY. But in this situation we have to do it manually. Notice, that by | |
| 3456 // using ThreadStateTransition::transition, we do a callback to the safepoint code if | |
| 3457 // needed. | |
| 3458 | |
| 3459 ThreadStateTransition::transition_and_fence(thread, _thread_in_vm, _thread_in_native); | |
| 3460 | |
| 3461 // Perform any platform dependent FPU setup | |
| 3462 os::setup_fpu(); | |
| 3463 | |
| 3464 return JNI_OK; | |
| 3465 } | |
| 3466 | |
| 3467 | |
| 3468 jint JNICALL jni_AttachCurrentThread(JavaVM *vm, void **penv, void *_args) { | |
| 3469 DTRACE_PROBE3(hotspot_jni, AttachCurrentThread__entry, vm, penv, _args); | |
| 3470 if (!vm_created) { | |
| 3471 DTRACE_PROBE1(hotspot_jni, AttachCurrentThread__return, JNI_ERR); | |
| 3472 return JNI_ERR; | |
| 3473 } | |
| 3474 | |
| 3475 JNIWrapper("AttachCurrentThread"); | |
| 3476 jint ret = attach_current_thread(vm, penv, _args, false); | |
| 3477 DTRACE_PROBE1(hotspot_jni, AttachCurrentThread__return, ret); | |
| 3478 return ret; | |
| 3479 } | |
| 3480 | |
| 3481 | |
| 3482 jint JNICALL jni_DetachCurrentThread(JavaVM *vm) { | |
| 3483 DTRACE_PROBE1(hotspot_jni, DetachCurrentThread__entry, vm); | |
| 3484 VM_Exit::block_if_vm_exited(); | |
| 3485 | |
| 3486 JNIWrapper("DetachCurrentThread"); | |
| 3487 | |
| 3488 // If the thread has been deattacted the operations is a no-op | |
| 3489 if (ThreadLocalStorage::thread() == NULL) { | |
| 3490 DTRACE_PROBE1(hotspot_jni, DetachCurrentThread__return, JNI_OK); | |
| 3491 return JNI_OK; | |
| 3492 } | |
| 3493 | |
| 3494 JavaThread* thread = JavaThread::current(); | |
| 3495 if (thread->has_last_Java_frame()) { | |
| 3496 DTRACE_PROBE1(hotspot_jni, DetachCurrentThread__return, JNI_ERR); | |
| 3497 // Can't detach a thread that's running java, that can't work. | |
| 3498 return JNI_ERR; | |
| 3499 } | |
| 3500 | |
| 3501 // Safepoint support. Have to do call-back to safepoint code, if in the | |
| 3502 // middel of a safepoint operation | |
| 3503 ThreadStateTransition::transition_from_native(thread, _thread_in_vm); | |
| 3504 | |
| 3505 // XXX: Note that JavaThread::exit() call below removes the guards on the | |
| 3506 // stack pages set up via enable_stack_{red,yellow}_zone() calls | |
| 3507 // above in jni_AttachCurrentThread. Unfortunately, while the setting | |
| 3508 // of the guards is visible in jni_AttachCurrentThread above, | |
| 3509 // the removal of the guards is buried below in JavaThread::exit() | |
| 3510 // here. The abstraction should be more symmetrically either exposed | |
| 3511 // or hidden (e.g. it could probably be hidden in the same | |
| 3512 // (platform-dependent) methods where we do alternate stack | |
| 3513 // maintenance work?) | |
| 3514 thread->exit(false, JavaThread::jni_detach); | |
| 3515 delete thread; | |
| 3516 | |
| 3517 DTRACE_PROBE1(hotspot_jni, DetachCurrentThread__return, JNI_OK); | |
| 3518 return JNI_OK; | |
| 3519 } | |
| 3520 | |
| 3521 DT_RETURN_MARK_DECL(GetEnv, jint); | |
| 3522 | |
| 3523 jint JNICALL jni_GetEnv(JavaVM *vm, void **penv, jint version) { | |
| 3524 DTRACE_PROBE3(hotspot_jni, GetEnv__entry, vm, penv, version); | |
| 3525 jint ret = JNI_ERR; | |
| 3526 DT_RETURN_MARK(GetEnv, jint, (const jint&)ret); | |
| 3527 | |
| 3528 if (!vm_created) { | |
| 3529 *penv = NULL; | |
| 3530 ret = JNI_EDETACHED; | |
| 3531 return ret; | |
| 3532 } | |
| 3533 | |
| 3534 if (JvmtiExport::is_jvmti_version(version)) { | |
| 3535 ret = JvmtiExport::get_jvmti_interface(vm, penv, version); | |
| 3536 return ret; | |
| 3537 } | |
| 3538 | |
| 3539 #ifndef JVMPI_VERSION_1 | |
| 3540 // need these in order to be polite about older agents | |
| 3541 #define JVMPI_VERSION_1 ((jint)0x10000001) | |
| 3542 #define JVMPI_VERSION_1_1 ((jint)0x10000002) | |
| 3543 #define JVMPI_VERSION_1_2 ((jint)0x10000003) | |
| 3544 #endif // !JVMPI_VERSION_1 | |
| 3545 | |
| 3546 Thread* thread = ThreadLocalStorage::thread(); | |
| 3547 if (thread != NULL && thread->is_Java_thread()) { | |
| 3548 if (Threads::is_supported_jni_version_including_1_1(version)) { | |
| 3549 *(JNIEnv**)penv = ((JavaThread*) thread)->jni_environment(); | |
| 3550 ret = JNI_OK; | |
| 3551 return ret; | |
| 3552 | |
| 3553 } else if (version == JVMPI_VERSION_1 || | |
| 3554 version == JVMPI_VERSION_1_1 || | |
| 3555 version == JVMPI_VERSION_1_2) { | |
| 3556 tty->print_cr("ERROR: JVMPI, an experimental interface, is no longer supported."); | |
| 3557 tty->print_cr("Please use the supported interface: the JVM Tool Interface (JVM TI)."); | |
| 3558 ret = JNI_EVERSION; | |
| 3559 return ret; | |
| 3560 } else if (JvmtiExport::is_jvmdi_version(version)) { | |
| 3561 tty->print_cr("FATAL ERROR: JVMDI is no longer supported."); | |
| 3562 tty->print_cr("Please use the supported interface: the JVM Tool Interface (JVM TI)."); | |
| 3563 ret = JNI_EVERSION; | |
| 3564 return ret; | |
| 3565 } else { | |
| 3566 *penv = NULL; | |
| 3567 ret = JNI_EVERSION; | |
| 3568 return ret; | |
| 3569 } | |
| 3570 } else { | |
| 3571 *penv = NULL; | |
| 3572 ret = JNI_EDETACHED; | |
| 3573 return ret; | |
| 3574 } | |
| 3575 } | |
| 3576 | |
| 3577 | |
| 3578 jint JNICALL jni_AttachCurrentThreadAsDaemon(JavaVM *vm, void **penv, void *_args) { | |
| 3579 DTRACE_PROBE3(hotspot_jni, AttachCurrentThreadAsDaemon__entry, vm, penv, _args); | |
| 3580 if (!vm_created) { | |
| 3581 DTRACE_PROBE1(hotspot_jni, AttachCurrentThreadAsDaemon__return, JNI_ERR); | |
| 3582 return JNI_ERR; | |
| 3583 } | |
| 3584 | |
| 3585 JNIWrapper("AttachCurrentThreadAsDaemon"); | |
| 3586 jint ret = attach_current_thread(vm, penv, _args, true); | |
| 3587 DTRACE_PROBE1(hotspot_jni, AttachCurrentThreadAsDaemon__return, ret); | |
| 3588 return ret; | |
| 3589 } | |
| 3590 | |
| 3591 | |
| 3592 } // End extern "C" | |
| 3593 | |
| 3594 const struct JNIInvokeInterface_ jni_InvokeInterface = { | |
| 3595 NULL, | |
| 3596 NULL, | |
| 3597 NULL, | |
| 3598 | |
| 3599 jni_DestroyJavaVM, | |
| 3600 jni_AttachCurrentThread, | |
| 3601 jni_DetachCurrentThread, | |
| 3602 jni_GetEnv, | |
| 3603 jni_AttachCurrentThreadAsDaemon | |
| 3604 }; |