Mercurial > hg > truffle
annotate src/share/vm/prims/jni.cpp @ 657:715dceaa89b7
6603316: Improve instrumentation for classes loaded at startup
Reviewed-by: xlu, mchung
| author | acorn |
|---|---|
| date | Wed, 25 Mar 2009 13:09:28 -0400 |
| parents | 0fbdb4381b99 |
| children | ad6585fd4087 |
| 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(); | |
|
113
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
0
diff
changeset
|
138 // With compressed oops the most super class with nonstatic fields would |
|
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
0
diff
changeset
|
139 // be the owner of fields embedded in the header. |
|
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
0
diff
changeset
|
140 while (instanceKlass::cast(super_klass)->has_nonstatic_fields() && |
|
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
0
diff
changeset
|
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, | |
| 302 Handle(), &st, CHECK_NULL); | |
| 303 | |
|
657
715dceaa89b7
6603316: Improve instrumentation for classes loaded at startup
acorn
parents:
579
diff
changeset
|
304 if (TraceClassResolution && k != NULL) { |
|
715dceaa89b7
6603316: Improve instrumentation for classes loaded at startup
acorn
parents:
579
diff
changeset
|
305 trace_class_resolution(k); |
|
715dceaa89b7
6603316: Improve instrumentation for classes loaded at startup
acorn
parents:
579
diff
changeset
|
306 } |
|
715dceaa89b7
6603316: Improve instrumentation for classes loaded at startup
acorn
parents:
579
diff
changeset
|
307 |
| 0 | 308 cls = (jclass)JNIHandles::make_local( |
| 309 env, Klass::cast(k)->java_mirror()); | |
| 310 return cls; | |
| 311 JNI_END | |
| 312 | |
| 313 | |
| 314 | |
| 315 static bool first_time_FindClass = true; | |
| 316 | |
| 317 DT_RETURN_MARK_DECL(FindClass, jclass); | |
| 318 | |
| 319 JNI_ENTRY(jclass, jni_FindClass(JNIEnv *env, const char *name)) | |
| 320 JNIWrapper("FindClass"); | |
| 321 DTRACE_PROBE2(hotspot_jni, FindClass__entry, env, name); | |
| 322 | |
| 323 jclass result = NULL; | |
| 324 DT_RETURN_MARK(FindClass, jclass, (const jclass&)result); | |
| 325 | |
| 326 // Remember if we are the first invocation of jni_FindClass | |
| 327 bool first_time = first_time_FindClass; | |
| 328 first_time_FindClass = false; | |
| 329 | |
| 330 // Sanity check the name: it cannot be null or larger than the maximum size | |
| 331 // name we can fit in the constant pool. | |
| 332 if (name == NULL || (int)strlen(name) > symbolOopDesc::max_length()) { | |
| 333 THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), name); | |
| 334 } | |
| 335 | |
| 336 //%note jni_3 | |
| 337 Handle loader; | |
| 338 Handle protection_domain; | |
| 339 // Find calling class | |
| 340 instanceKlassHandle k (THREAD, thread->security_get_caller_class(0)); | |
| 341 if (k.not_null()) { | |
| 342 loader = Handle(THREAD, k->class_loader()); | |
| 343 // Special handling to make sure JNI_OnLoad and JNI_OnUnload are executed | |
| 344 // in the correct class context. | |
| 345 if (loader.is_null() && | |
| 346 k->name() == vmSymbols::java_lang_ClassLoader_NativeLibrary()) { | |
| 347 JavaValue result(T_OBJECT); | |
| 348 JavaCalls::call_static(&result, k, | |
| 349 vmSymbolHandles::getFromClass_name(), | |
| 350 vmSymbolHandles::void_class_signature(), | |
| 351 thread); | |
| 352 if (HAS_PENDING_EXCEPTION) { | |
| 353 Handle ex(thread, thread->pending_exception()); | |
| 354 CLEAR_PENDING_EXCEPTION; | |
| 355 THROW_HANDLE_0(ex); | |
| 356 } | |
| 357 oop mirror = (oop) result.get_jobject(); | |
| 358 loader = Handle(THREAD, | |
| 359 instanceKlass::cast(java_lang_Class::as_klassOop(mirror))->class_loader()); | |
| 360 protection_domain = Handle(THREAD, | |
| 361 instanceKlass::cast(java_lang_Class::as_klassOop(mirror))->protection_domain()); | |
| 362 } | |
| 363 } else { | |
| 364 // We call ClassLoader.getSystemClassLoader to obtain the system class loader. | |
| 365 loader = Handle(THREAD, SystemDictionary::java_system_loader()); | |
| 366 } | |
| 367 | |
| 368 symbolHandle sym = oopFactory::new_symbol_handle(name, CHECK_NULL); | |
| 369 result = find_class_from_class_loader(env, sym, true, loader, | |
| 370 protection_domain, true, thread); | |
| 371 | |
|
657
715dceaa89b7
6603316: Improve instrumentation for classes loaded at startup
acorn
parents:
579
diff
changeset
|
372 if (TraceClassResolution && result != NULL) { |
|
715dceaa89b7
6603316: Improve instrumentation for classes loaded at startup
acorn
parents:
579
diff
changeset
|
373 trace_class_resolution(java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(result))); |
|
715dceaa89b7
6603316: Improve instrumentation for classes loaded at startup
acorn
parents:
579
diff
changeset
|
374 } |
|
715dceaa89b7
6603316: Improve instrumentation for classes loaded at startup
acorn
parents:
579
diff
changeset
|
375 |
| 0 | 376 // If we were the first invocation of jni_FindClass, we enable compilation again |
| 377 // rather than just allowing invocation counter to overflow and decay. | |
| 378 // Controlled by flag DelayCompilationDuringStartup. | |
| 379 if (first_time && !CompileTheWorld) | |
| 380 CompilationPolicy::completed_vm_startup(); | |
| 381 | |
| 382 return result; | |
| 383 JNI_END | |
| 384 | |
| 385 DT_RETURN_MARK_DECL(FromReflectedMethod, jmethodID); | |
| 386 | |
| 387 JNI_ENTRY(jmethodID, jni_FromReflectedMethod(JNIEnv *env, jobject method)) | |
| 388 JNIWrapper("FromReflectedMethod"); | |
| 389 DTRACE_PROBE2(hotspot_jni, FromReflectedMethod__entry, env, method); | |
| 390 jmethodID ret = NULL; | |
| 391 DT_RETURN_MARK(FromReflectedMethod, jmethodID, (const jmethodID&)ret); | |
| 392 | |
| 393 // method is a handle to a java.lang.reflect.Method object | |
| 394 oop reflected = JNIHandles::resolve_non_null(method); | |
| 395 oop mirror = NULL; | |
| 396 int slot = 0; | |
| 397 | |
| 398 if (reflected->klass() == SystemDictionary::reflect_constructor_klass()) { | |
| 399 mirror = java_lang_reflect_Constructor::clazz(reflected); | |
| 400 slot = java_lang_reflect_Constructor::slot(reflected); | |
| 401 } else { | |
| 402 assert(reflected->klass() == SystemDictionary::reflect_method_klass(), "wrong type"); | |
| 403 mirror = java_lang_reflect_Method::clazz(reflected); | |
| 404 slot = java_lang_reflect_Method::slot(reflected); | |
| 405 } | |
| 406 klassOop k = java_lang_Class::as_klassOop(mirror); | |
| 407 | |
| 408 KlassHandle k1(THREAD, k); | |
| 409 // Make sure class is initialized before handing id's out to methods | |
| 410 Klass::cast(k1())->initialize(CHECK_NULL); | |
| 411 methodOop m = instanceKlass::cast(k1())->method_with_idnum(slot); | |
| 412 ret = m==NULL? NULL : m->jmethod_id(); // return NULL if reflected method deleted | |
| 413 return ret; | |
| 414 JNI_END | |
| 415 | |
| 416 DT_RETURN_MARK_DECL(FromReflectedField, jfieldID); | |
| 417 | |
| 418 JNI_ENTRY(jfieldID, jni_FromReflectedField(JNIEnv *env, jobject field)) | |
| 419 JNIWrapper("FromReflectedField"); | |
| 420 DTRACE_PROBE2(hotspot_jni, FromReflectedField__entry, env, field); | |
| 421 jfieldID ret = NULL; | |
| 422 DT_RETURN_MARK(FromReflectedField, jfieldID, (const jfieldID&)ret); | |
| 423 | |
| 424 // field is a handle to a java.lang.reflect.Field object | |
| 425 oop reflected = JNIHandles::resolve_non_null(field); | |
| 426 oop mirror = java_lang_reflect_Field::clazz(reflected); | |
| 427 klassOop k = java_lang_Class::as_klassOop(mirror); | |
| 428 int slot = java_lang_reflect_Field::slot(reflected); | |
| 429 int modifiers = java_lang_reflect_Field::modifiers(reflected); | |
| 430 | |
| 431 KlassHandle k1(THREAD, k); | |
| 432 // Make sure class is initialized before handing id's out to fields | |
| 433 Klass::cast(k1())->initialize(CHECK_NULL); | |
| 434 | |
| 435 // First check if this is a static field | |
| 436 if (modifiers & JVM_ACC_STATIC) { | |
| 437 intptr_t offset = instanceKlass::cast(k1())->offset_from_fields( slot ); | |
| 438 JNIid* id = instanceKlass::cast(k1())->jni_id_for(offset); | |
| 439 assert(id != NULL, "corrupt Field object"); | |
| 440 debug_only(id->set_is_static_field_id();) | |
| 441 // A jfieldID for a static field is a JNIid specifying the field holder and the offset within the klassOop | |
| 442 ret = jfieldIDWorkaround::to_static_jfieldID(id); | |
| 443 return ret; | |
| 444 } | |
| 445 | |
| 446 // The slot is the index of the field description in the field-array | |
| 447 // The jfieldID is the offset of the field within the object | |
| 448 // It may also have hash bits for k, if VerifyJNIFields is turned on. | |
| 449 intptr_t offset = instanceKlass::cast(k1())->offset_from_fields( slot ); | |
| 450 assert(instanceKlass::cast(k1())->contains_field_offset(offset), "stay within object"); | |
| 451 ret = jfieldIDWorkaround::to_instance_jfieldID(k1(), offset); | |
| 452 return ret; | |
| 453 JNI_END | |
| 454 | |
| 455 DT_RETURN_MARK_DECL(ToReflectedMethod, jobject); | |
| 456 | |
| 457 JNI_ENTRY(jobject, jni_ToReflectedMethod(JNIEnv *env, jclass cls, jmethodID method_id, jboolean isStatic)) | |
| 458 JNIWrapper("ToReflectedMethod"); | |
| 459 DTRACE_PROBE4(hotspot_jni, ToReflectedMethod__entry, env, cls, method_id, isStatic); | |
| 460 jobject ret = NULL; | |
| 461 DT_RETURN_MARK(ToReflectedMethod, jobject, (const jobject&)ret); | |
| 462 | |
| 463 methodHandle m (THREAD, JNIHandles::resolve_jmethod_id(method_id)); | |
| 464 assert(m->is_static() == (isStatic != 0), "jni_ToReflectedMethod access flags doesn't match"); | |
| 465 oop reflection_method; | |
| 466 if (m->is_initializer()) { | |
| 467 reflection_method = Reflection::new_constructor(m, CHECK_NULL); | |
| 468 } else { | |
| 469 reflection_method = Reflection::new_method(m, UseNewReflection, false, CHECK_NULL); | |
| 470 } | |
| 471 ret = JNIHandles::make_local(env, reflection_method); | |
| 472 return ret; | |
| 473 JNI_END | |
| 474 | |
| 475 DT_RETURN_MARK_DECL(GetSuperclass, jclass); | |
| 476 | |
| 477 JNI_ENTRY(jclass, jni_GetSuperclass(JNIEnv *env, jclass sub)) | |
| 478 JNIWrapper("GetSuperclass"); | |
| 479 DTRACE_PROBE2(hotspot_jni, GetSuperclass__entry, env, sub); | |
| 480 jclass obj = NULL; | |
| 481 DT_RETURN_MARK(GetSuperclass, jclass, (const jclass&)obj); | |
| 482 | |
| 483 oop mirror = JNIHandles::resolve_non_null(sub); | |
| 484 // primitive classes return NULL | |
| 485 if (java_lang_Class::is_primitive(mirror)) return NULL; | |
| 486 | |
| 487 // Rules of Class.getSuperClass as implemented by KLass::java_super: | |
| 488 // arrays return Object | |
| 489 // interfaces return NULL | |
| 490 // proper classes return Klass::super() | |
| 491 klassOop k = java_lang_Class::as_klassOop(mirror); | |
| 492 if (Klass::cast(k)->is_interface()) return NULL; | |
| 493 | |
| 494 // return mirror for superclass | |
| 495 klassOop super = Klass::cast(k)->java_super(); | |
| 496 // super2 is the value computed by the compiler's getSuperClass intrinsic: | |
| 497 debug_only(klassOop super2 = ( Klass::cast(k)->oop_is_javaArray() | |
| 498 ? SystemDictionary::object_klass() | |
| 499 : Klass::cast(k)->super() ) ); | |
| 500 assert(super == super2, | |
| 501 "java_super computation depends on interface, array, other super"); | |
| 502 obj = (super == NULL) ? NULL : (jclass) JNIHandles::make_local(Klass::cast(super)->java_mirror()); | |
| 503 return obj; | |
| 504 JNI_END | |
| 505 | |
| 506 JNI_QUICK_ENTRY(jboolean, jni_IsAssignableFrom(JNIEnv *env, jclass sub, jclass super)) | |
| 507 JNIWrapper("IsSubclassOf"); | |
| 508 DTRACE_PROBE3(hotspot_jni, IsAssignableFrom__entry, env, sub, super); | |
| 509 oop sub_mirror = JNIHandles::resolve_non_null(sub); | |
| 510 oop super_mirror = JNIHandles::resolve_non_null(super); | |
| 511 if (java_lang_Class::is_primitive(sub_mirror) || | |
| 512 java_lang_Class::is_primitive(super_mirror)) { | |
| 513 jboolean ret = (sub_mirror == super_mirror); | |
| 514 DTRACE_PROBE1(hotspot_jni, IsAssignableFrom__return, ret); | |
| 515 return ret; | |
| 516 } | |
| 517 klassOop sub_klass = java_lang_Class::as_klassOop(sub_mirror); | |
| 518 klassOop super_klass = java_lang_Class::as_klassOop(super_mirror); | |
| 519 assert(sub_klass != NULL && super_klass != NULL, "invalid arguments to jni_IsAssignableFrom"); | |
| 520 jboolean ret = Klass::cast(sub_klass)->is_subtype_of(super_klass) ? | |
| 521 JNI_TRUE : JNI_FALSE; | |
| 522 DTRACE_PROBE1(hotspot_jni, IsAssignableFrom__return, ret); | |
| 523 return ret; | |
| 524 JNI_END | |
| 525 | |
| 526 DT_RETURN_MARK_DECL(Throw, jint); | |
| 527 | |
| 528 JNI_ENTRY(jint, jni_Throw(JNIEnv *env, jthrowable obj)) | |
| 529 JNIWrapper("Throw"); | |
| 530 DTRACE_PROBE2(hotspot_jni, Throw__entry, env, obj); | |
| 531 jint ret = JNI_OK; | |
| 532 DT_RETURN_MARK(Throw, jint, (const jint&)ret); | |
| 533 | |
| 534 THROW_OOP_(JNIHandles::resolve(obj), JNI_OK); | |
| 535 ShouldNotReachHere(); | |
| 536 JNI_END | |
| 537 | |
| 538 DT_RETURN_MARK_DECL(ThrowNew, jint); | |
| 539 | |
| 540 JNI_ENTRY(jint, jni_ThrowNew(JNIEnv *env, jclass clazz, const char *message)) | |
| 541 JNIWrapper("ThrowNew"); | |
| 542 DTRACE_PROBE3(hotspot_jni, ThrowNew__entry, env, clazz, message); | |
| 543 jint ret = JNI_OK; | |
| 544 DT_RETURN_MARK(ThrowNew, jint, (const jint&)ret); | |
| 545 | |
| 546 instanceKlass* k = instanceKlass::cast(java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(clazz))); | |
| 547 symbolHandle name = symbolHandle(THREAD, k->name()); | |
| 548 Handle class_loader (THREAD, k->class_loader()); | |
| 549 Handle protection_domain (THREAD, k->protection_domain()); | |
| 550 THROW_MSG_LOADER_(name, (char *)message, class_loader, protection_domain, JNI_OK); | |
| 551 ShouldNotReachHere(); | |
| 552 JNI_END | |
| 553 | |
| 554 | |
| 555 // JNI functions only transform a pending async exception to a synchronous | |
| 556 // exception in ExceptionOccurred and ExceptionCheck calls, since | |
| 557 // delivering an async exception in other places won't change the native | |
| 558 // code's control flow and would be harmful when native code further calls | |
| 559 // JNI functions with a pending exception. Async exception is also checked | |
| 560 // during the call, so ExceptionOccurred/ExceptionCheck won't return | |
| 561 // false but deliver the async exception at the very end during | |
| 562 // state transition. | |
| 563 | |
| 564 static void jni_check_async_exceptions(JavaThread *thread) { | |
| 565 assert(thread == Thread::current(), "must be itself"); | |
| 566 thread->check_and_handle_async_exceptions(); | |
| 567 } | |
| 568 | |
| 569 JNI_ENTRY_NO_PRESERVE(jthrowable, jni_ExceptionOccurred(JNIEnv *env)) | |
| 570 JNIWrapper("ExceptionOccurred"); | |
| 571 DTRACE_PROBE1(hotspot_jni, ExceptionOccurred__entry, env); | |
| 572 jni_check_async_exceptions(thread); | |
| 573 oop exception = thread->pending_exception(); | |
| 574 jthrowable ret = (jthrowable) JNIHandles::make_local(env, exception); | |
| 575 DTRACE_PROBE1(hotspot_jni, ExceptionOccurred__return, ret); | |
| 576 return ret; | |
| 577 JNI_END | |
| 578 | |
| 579 | |
| 580 JNI_ENTRY_NO_PRESERVE(void, jni_ExceptionDescribe(JNIEnv *env)) | |
| 581 JNIWrapper("ExceptionDescribe"); | |
| 582 DTRACE_PROBE1(hotspot_jni, ExceptionDescribe__entry, env); | |
| 583 if (thread->has_pending_exception()) { | |
| 584 Handle ex(thread, thread->pending_exception()); | |
| 585 thread->clear_pending_exception(); | |
| 586 if (ex->is_a(SystemDictionary::threaddeath_klass())) { | |
| 587 // Don't print anything if we are being killed. | |
| 588 } else { | |
| 589 jio_fprintf(defaultStream::error_stream(), "Exception "); | |
| 590 if (thread != NULL && thread->threadObj() != NULL) { | |
| 591 ResourceMark rm(THREAD); | |
| 592 jio_fprintf(defaultStream::error_stream(), | |
| 593 "in thread \"%s\" ", thread->get_thread_name()); | |
| 594 } | |
| 595 if (ex->is_a(SystemDictionary::throwable_klass())) { | |
| 596 JavaValue result(T_VOID); | |
| 597 JavaCalls::call_virtual(&result, | |
| 598 ex, | |
| 599 KlassHandle(THREAD, | |
| 600 SystemDictionary::throwable_klass()), | |
| 601 vmSymbolHandles::printStackTrace_name(), | |
| 602 vmSymbolHandles::void_method_signature(), | |
| 603 THREAD); | |
| 604 // If an exception is thrown in the call it gets thrown away. Not much | |
| 605 // we can do with it. The native code that calls this, does not check | |
| 606 // for the exception - hence, it might still be in the thread when DestroyVM gets | |
| 607 // called, potentially causing a few asserts to trigger - since no pending exception | |
| 608 // is expected. | |
| 609 CLEAR_PENDING_EXCEPTION; | |
| 610 } else { | |
| 611 ResourceMark rm(THREAD); | |
| 612 jio_fprintf(defaultStream::error_stream(), | |
| 613 ". Uncaught exception of type %s.", | |
| 614 Klass::cast(ex->klass())->external_name()); | |
| 615 } | |
| 616 } | |
| 617 } | |
| 618 DTRACE_PROBE(hotspot_jni, ExceptionDescribe__return); | |
| 619 JNI_END | |
| 620 | |
| 621 | |
| 622 JNI_QUICK_ENTRY(void, jni_ExceptionClear(JNIEnv *env)) | |
| 623 JNIWrapper("ExceptionClear"); | |
| 624 DTRACE_PROBE1(hotspot_jni, ExceptionClear__entry, env); | |
| 625 | |
| 626 // The jni code might be using this API to clear java thrown exception. | |
| 627 // So just mark jvmti thread exception state as exception caught. | |
| 628 JvmtiThreadState *state = JavaThread::current()->jvmti_thread_state(); | |
| 629 if (state != NULL && state->is_exception_detected()) { | |
| 630 state->set_exception_caught(); | |
| 631 } | |
| 632 thread->clear_pending_exception(); | |
| 633 DTRACE_PROBE(hotspot_jni, ExceptionClear__return); | |
| 634 JNI_END | |
| 635 | |
| 636 | |
| 637 JNI_ENTRY(void, jni_FatalError(JNIEnv *env, const char *msg)) | |
| 638 JNIWrapper("FatalError"); | |
| 639 DTRACE_PROBE2(hotspot_jni, FatalError__entry, env, msg); | |
| 640 tty->print_cr("FATAL ERROR in native method: %s", msg); | |
| 641 thread->print_stack(); | |
|
227
8d852b81e775
6694099: Hotspot vm_exit_out_of_memory should dump core
poonam
parents:
113
diff
changeset
|
642 os::abort(); // Dump core and abort |
| 0 | 643 JNI_END |
| 644 | |
| 645 | |
| 646 JNI_ENTRY(jint, jni_PushLocalFrame(JNIEnv *env, jint capacity)) | |
| 647 JNIWrapper("PushLocalFrame"); | |
| 648 DTRACE_PROBE2(hotspot_jni, PushLocalFrame__entry, env, capacity); | |
| 649 //%note jni_11 | |
| 650 if (capacity < 0 && capacity > MAX_REASONABLE_LOCAL_CAPACITY) { | |
| 651 DTRACE_PROBE1(hotspot_jni, PushLocalFrame__return, JNI_ERR); | |
| 652 return JNI_ERR; | |
| 653 } | |
| 654 JNIHandleBlock* old_handles = thread->active_handles(); | |
| 655 JNIHandleBlock* new_handles = JNIHandleBlock::allocate_block(thread); | |
| 656 assert(new_handles != NULL, "should not be NULL"); | |
| 657 new_handles->set_pop_frame_link(old_handles); | |
| 658 thread->set_active_handles(new_handles); | |
| 659 jint ret = JNI_OK; | |
| 660 DTRACE_PROBE1(hotspot_jni, PushLocalFrame__return, ret); | |
| 661 return ret; | |
| 662 JNI_END | |
| 663 | |
| 664 | |
| 665 JNI_ENTRY(jobject, jni_PopLocalFrame(JNIEnv *env, jobject result)) | |
| 666 JNIWrapper("PopLocalFrame"); | |
| 667 DTRACE_PROBE2(hotspot_jni, PopLocalFrame__entry, env, result); | |
| 668 //%note jni_11 | |
| 669 Handle result_handle(thread, JNIHandles::resolve(result)); | |
| 670 JNIHandleBlock* old_handles = thread->active_handles(); | |
| 671 JNIHandleBlock* new_handles = old_handles->pop_frame_link(); | |
| 672 if (new_handles != NULL) { | |
| 673 // As a sanity check we only release the handle blocks if the pop_frame_link is not NULL. | |
| 674 // This way code will still work if PopLocalFrame is called without a corresponding | |
| 675 // PushLocalFrame call. Note that we set the pop_frame_link to NULL explicitly, otherwise | |
| 676 // the release_block call will release the blocks. | |
| 677 thread->set_active_handles(new_handles); | |
| 678 old_handles->set_pop_frame_link(NULL); // clear link we won't release new_handles below | |
| 679 JNIHandleBlock::release_block(old_handles, thread); // may block | |
| 680 result = JNIHandles::make_local(thread, result_handle()); | |
| 681 } | |
| 682 DTRACE_PROBE1(hotspot_jni, PopLocalFrame__return, result); | |
| 683 return result; | |
| 684 JNI_END | |
| 685 | |
| 686 | |
| 687 JNI_ENTRY(jobject, jni_NewGlobalRef(JNIEnv *env, jobject ref)) | |
| 688 JNIWrapper("NewGlobalRef"); | |
| 689 DTRACE_PROBE2(hotspot_jni, NewGlobalRef__entry, env, ref); | |
| 690 Handle ref_handle(thread, JNIHandles::resolve(ref)); | |
| 691 jobject ret = JNIHandles::make_global(ref_handle); | |
| 692 DTRACE_PROBE1(hotspot_jni, NewGlobalRef__return, ret); | |
| 693 return ret; | |
| 694 JNI_END | |
| 695 | |
| 696 // Must be JNI_ENTRY (with HandleMark) | |
| 697 JNI_ENTRY_NO_PRESERVE(void, jni_DeleteGlobalRef(JNIEnv *env, jobject ref)) | |
| 698 JNIWrapper("DeleteGlobalRef"); | |
| 699 DTRACE_PROBE2(hotspot_jni, DeleteGlobalRef__entry, env, ref); | |
| 700 JNIHandles::destroy_global(ref); | |
| 701 DTRACE_PROBE(hotspot_jni, DeleteGlobalRef__return); | |
| 702 JNI_END | |
| 703 | |
| 704 JNI_QUICK_ENTRY(void, jni_DeleteLocalRef(JNIEnv *env, jobject obj)) | |
| 705 JNIWrapper("DeleteLocalRef"); | |
| 706 DTRACE_PROBE2(hotspot_jni, DeleteLocalRef__entry, env, obj); | |
| 707 JNIHandles::destroy_local(obj); | |
| 708 DTRACE_PROBE(hotspot_jni, DeleteLocalRef__return); | |
| 709 JNI_END | |
| 710 | |
| 711 JNI_QUICK_ENTRY(jboolean, jni_IsSameObject(JNIEnv *env, jobject r1, jobject r2)) | |
| 712 JNIWrapper("IsSameObject"); | |
| 713 DTRACE_PROBE3(hotspot_jni, IsSameObject__entry, env, r1, r2); | |
| 714 oop a = JNIHandles::resolve(r1); | |
| 715 oop b = JNIHandles::resolve(r2); | |
| 716 jboolean ret = (a == b) ? JNI_TRUE : JNI_FALSE; | |
| 717 DTRACE_PROBE1(hotspot_jni, IsSameObject__return, ret); | |
| 718 return ret; | |
| 719 JNI_END | |
| 720 | |
| 721 | |
| 722 JNI_ENTRY(jobject, jni_NewLocalRef(JNIEnv *env, jobject ref)) | |
| 723 JNIWrapper("NewLocalRef"); | |
| 724 DTRACE_PROBE2(hotspot_jni, NewLocalRef__entry, env, ref); | |
| 725 jobject ret = JNIHandles::make_local(env, JNIHandles::resolve(ref)); | |
| 726 DTRACE_PROBE1(hotspot_jni, NewLocalRef__return, ret); | |
| 727 return ret; | |
| 728 JNI_END | |
| 729 | |
| 730 JNI_LEAF(jint, jni_EnsureLocalCapacity(JNIEnv *env, jint capacity)) | |
| 731 JNIWrapper("EnsureLocalCapacity"); | |
| 732 DTRACE_PROBE2(hotspot_jni, EnsureLocalCapacity__entry, env, capacity); | |
| 733 jint ret; | |
| 734 if (capacity >= 0 && capacity <= MAX_REASONABLE_LOCAL_CAPACITY) { | |
| 735 ret = JNI_OK; | |
| 736 } else { | |
| 737 ret = JNI_ERR; | |
| 738 } | |
| 739 DTRACE_PROBE1(hotspot_jni, EnsureLocalCapacity__return, ret); | |
| 740 return ret; | |
| 741 JNI_END | |
| 742 | |
| 743 // Return the Handle Type | |
| 744 JNI_LEAF(jobjectRefType, jni_GetObjectRefType(JNIEnv *env, jobject obj)) | |
| 745 JNIWrapper("GetObjectRefType"); | |
| 746 DTRACE_PROBE2(hotspot_jni, GetObjectRefType__entry, env, obj); | |
| 747 jobjectRefType ret; | |
| 748 if (JNIHandles::is_local_handle(thread, obj) || | |
| 749 JNIHandles::is_frame_handle(thread, obj)) | |
| 750 ret = JNILocalRefType; | |
| 751 else if (JNIHandles::is_global_handle(obj)) | |
| 752 ret = JNIGlobalRefType; | |
| 753 else if (JNIHandles::is_weak_global_handle(obj)) | |
| 754 ret = JNIWeakGlobalRefType; | |
| 755 else | |
| 756 ret = JNIInvalidRefType; | |
| 757 DTRACE_PROBE1(hotspot_jni, GetObjectRefType__return, ret); | |
| 758 return ret; | |
| 759 JNI_END | |
| 760 | |
| 761 | |
| 762 class JNI_ArgumentPusher : public SignatureIterator { | |
| 763 protected: | |
| 764 JavaCallArguments* _arguments; | |
| 765 | |
| 766 virtual void get_bool () = 0; | |
| 767 virtual void get_char () = 0; | |
| 768 virtual void get_short () = 0; | |
| 769 virtual void get_byte () = 0; | |
| 770 virtual void get_int () = 0; | |
| 771 virtual void get_long () = 0; | |
| 772 virtual void get_float () = 0; | |
| 773 virtual void get_double () = 0; | |
| 774 virtual void get_object () = 0; | |
| 775 | |
| 776 JNI_ArgumentPusher(Thread *thread, symbolOop signature) | |
| 777 : SignatureIterator(thread, signature) { | |
| 778 this->_return_type = T_ILLEGAL; | |
| 779 _arguments = NULL; | |
| 780 } | |
| 781 | |
| 782 public: | |
| 783 virtual void iterate( uint64_t fingerprint ) = 0; | |
| 784 | |
| 785 void set_java_argument_object(JavaCallArguments *arguments) { _arguments = arguments; } | |
| 786 | |
| 787 inline void do_bool() { if (!is_return_type()) get_bool(); } | |
| 788 inline void do_char() { if (!is_return_type()) get_char(); } | |
| 789 inline void do_short() { if (!is_return_type()) get_short(); } | |
| 790 inline void do_byte() { if (!is_return_type()) get_byte(); } | |
| 791 inline void do_int() { if (!is_return_type()) get_int(); } | |
| 792 inline void do_long() { if (!is_return_type()) get_long(); } | |
| 793 inline void do_float() { if (!is_return_type()) get_float(); } | |
| 794 inline void do_double() { if (!is_return_type()) get_double(); } | |
| 795 inline void do_object(int begin, int end) { if (!is_return_type()) get_object(); } | |
| 796 inline void do_array(int begin, int end) { if (!is_return_type()) get_object(); } // do_array uses get_object -- there is no get_array | |
| 797 inline void do_void() { } | |
| 798 | |
| 799 JavaCallArguments* arguments() { return _arguments; } | |
| 800 void push_receiver(Handle h) { _arguments->push_oop(h); } | |
| 801 }; | |
| 802 | |
| 803 | |
| 804 class JNI_ArgumentPusherVaArg : public JNI_ArgumentPusher { | |
| 805 protected: | |
| 806 va_list _ap; | |
| 807 | |
| 808 inline void get_bool() { _arguments->push_int(va_arg(_ap, jint)); } // bool is coerced to int when using va_arg | |
| 809 inline void get_char() { _arguments->push_int(va_arg(_ap, jint)); } // char is coerced to int when using va_arg | |
| 810 inline void get_short() { _arguments->push_int(va_arg(_ap, jint)); } // short is coerced to int when using va_arg | |
| 811 inline void get_byte() { _arguments->push_int(va_arg(_ap, jint)); } // byte is coerced to int when using va_arg | |
| 812 inline void get_int() { _arguments->push_int(va_arg(_ap, jint)); } | |
| 813 | |
| 814 // each of these paths is exercized by the various jck Call[Static,Nonvirtual,][Void,Int,..]Method[A,V,] tests | |
| 815 | |
| 816 inline void get_long() { _arguments->push_long(va_arg(_ap, jlong)); } | |
| 817 inline void get_float() { _arguments->push_float((jfloat)va_arg(_ap, jdouble)); } // float is coerced to double w/ va_arg | |
| 818 inline void get_double() { _arguments->push_double(va_arg(_ap, jdouble)); } | |
| 819 inline void get_object() { jobject l = va_arg(_ap, jobject); | |
| 820 _arguments->push_oop(Handle((oop *)l, false)); } | |
| 821 | |
| 822 inline void set_ap(va_list rap) { | |
| 823 #ifdef va_copy | |
| 824 va_copy(_ap, rap); | |
| 825 #elif defined (__va_copy) | |
| 826 __va_copy(_ap, rap); | |
| 827 #else | |
| 828 _ap = rap; | |
| 829 #endif | |
| 830 } | |
| 831 | |
| 832 public: | |
| 833 JNI_ArgumentPusherVaArg(Thread *thread, symbolOop signature, va_list rap) | |
| 834 : JNI_ArgumentPusher(thread, signature) { | |
| 835 set_ap(rap); | |
| 836 } | |
| 837 JNI_ArgumentPusherVaArg(Thread *thread, jmethodID method_id, va_list rap) | |
| 838 : JNI_ArgumentPusher(thread, JNIHandles::resolve_jmethod_id(method_id)->signature()) { | |
| 839 set_ap(rap); | |
| 840 } | |
| 841 | |
| 842 // Optimized path if we have the bitvector form of signature | |
| 843 void iterate( uint64_t fingerprint ) { | |
| 844 if ( fingerprint == UCONST64(-1) ) SignatureIterator::iterate();// Must be too many arguments | |
| 845 else { | |
| 846 _return_type = (BasicType)((fingerprint >> static_feature_size) & | |
| 847 result_feature_mask); | |
| 848 | |
| 849 assert(fingerprint, "Fingerprint should not be 0"); | |
| 850 fingerprint = fingerprint >> (static_feature_size + result_feature_size); | |
| 851 while ( 1 ) { | |
| 852 switch ( fingerprint & parameter_feature_mask ) { | |
| 853 case bool_parm: | |
| 854 case char_parm: | |
| 855 case short_parm: | |
| 856 case byte_parm: | |
| 857 case int_parm: | |
| 858 get_int(); | |
| 859 break; | |
| 860 case obj_parm: | |
| 861 get_object(); | |
| 862 break; | |
| 863 case long_parm: | |
| 864 get_long(); | |
| 865 break; | |
| 866 case float_parm: | |
| 867 get_float(); | |
| 868 break; | |
| 869 case double_parm: | |
| 870 get_double(); | |
| 871 break; | |
| 872 case done_parm: | |
| 873 return; | |
| 874 break; | |
| 875 default: | |
| 876 ShouldNotReachHere(); | |
| 877 break; | |
| 878 } | |
| 879 fingerprint >>= parameter_feature_size; | |
| 880 } | |
| 881 } | |
| 882 } | |
| 883 }; | |
| 884 | |
| 885 | |
| 886 class JNI_ArgumentPusherArray : public JNI_ArgumentPusher { | |
| 887 protected: | |
| 888 const jvalue *_ap; | |
| 889 | |
| 890 inline void get_bool() { _arguments->push_int((jint)(_ap++)->z); } | |
| 891 inline void get_char() { _arguments->push_int((jint)(_ap++)->c); } | |
| 892 inline void get_short() { _arguments->push_int((jint)(_ap++)->s); } | |
| 893 inline void get_byte() { _arguments->push_int((jint)(_ap++)->b); } | |
| 894 inline void get_int() { _arguments->push_int((jint)(_ap++)->i); } | |
| 895 | |
| 896 inline void get_long() { _arguments->push_long((_ap++)->j); } | |
| 897 inline void get_float() { _arguments->push_float((_ap++)->f); } | |
| 898 inline void get_double() { _arguments->push_double((_ap++)->d);} | |
| 899 inline void get_object() { _arguments->push_oop(Handle((oop *)(_ap++)->l, false)); } | |
| 900 | |
| 901 inline void set_ap(const jvalue *rap) { _ap = rap; } | |
| 902 | |
| 903 public: | |
| 904 JNI_ArgumentPusherArray(Thread *thread, symbolOop signature, const jvalue *rap) | |
| 905 : JNI_ArgumentPusher(thread, signature) { | |
| 906 set_ap(rap); | |
| 907 } | |
| 908 JNI_ArgumentPusherArray(Thread *thread, jmethodID method_id, const jvalue *rap) | |
| 909 : JNI_ArgumentPusher(thread, JNIHandles::resolve_jmethod_id(method_id)->signature()) { | |
| 910 set_ap(rap); | |
| 911 } | |
| 912 | |
| 913 // Optimized path if we have the bitvector form of signature | |
| 914 void iterate( uint64_t fingerprint ) { | |
| 915 if ( fingerprint == UCONST64(-1) ) SignatureIterator::iterate(); // Must be too many arguments | |
| 916 else { | |
| 917 _return_type = (BasicType)((fingerprint >> static_feature_size) & | |
| 918 result_feature_mask); | |
| 919 assert(fingerprint, "Fingerprint should not be 0"); | |
| 920 fingerprint = fingerprint >> (static_feature_size + result_feature_size); | |
| 921 while ( 1 ) { | |
| 922 switch ( fingerprint & parameter_feature_mask ) { | |
| 923 case bool_parm: | |
| 924 get_bool(); | |
| 925 break; | |
| 926 case char_parm: | |
| 927 get_char(); | |
| 928 break; | |
| 929 case short_parm: | |
| 930 get_short(); | |
| 931 break; | |
| 932 case byte_parm: | |
| 933 get_byte(); | |
| 934 break; | |
| 935 case int_parm: | |
| 936 get_int(); | |
| 937 break; | |
| 938 case obj_parm: | |
| 939 get_object(); | |
| 940 break; | |
| 941 case long_parm: | |
| 942 get_long(); | |
| 943 break; | |
| 944 case float_parm: | |
| 945 get_float(); | |
| 946 break; | |
| 947 case double_parm: | |
| 948 get_double(); | |
| 949 break; | |
| 950 case done_parm: | |
| 951 return; | |
| 952 break; | |
| 953 default: | |
| 954 ShouldNotReachHere(); | |
| 955 break; | |
| 956 } | |
| 957 fingerprint >>= parameter_feature_size; | |
| 958 } | |
| 959 } | |
| 960 } | |
| 961 }; | |
| 962 | |
| 963 | |
| 964 enum JNICallType { | |
| 965 JNI_STATIC, | |
| 966 JNI_VIRTUAL, | |
| 967 JNI_NONVIRTUAL | |
| 968 }; | |
| 969 | |
| 970 static methodHandle jni_resolve_interface_call(Handle recv, methodHandle method, TRAPS) { | |
| 971 assert(!method.is_null() , "method should not be null"); | |
| 972 | |
| 973 KlassHandle recv_klass; // Default to NULL (use of ?: can confuse gcc) | |
| 974 if (recv.not_null()) recv_klass = KlassHandle(THREAD, recv->klass()); | |
| 975 KlassHandle spec_klass (THREAD, method->method_holder()); | |
| 976 symbolHandle name (THREAD, method->name()); | |
| 977 symbolHandle signature (THREAD, method->signature()); | |
| 978 CallInfo info; | |
| 979 LinkResolver::resolve_interface_call(info, recv, recv_klass, spec_klass, name, signature, KlassHandle(), false, true, CHECK_(methodHandle())); | |
| 980 return info.selected_method(); | |
| 981 } | |
| 982 | |
| 983 static methodHandle jni_resolve_virtual_call(Handle recv, methodHandle method, TRAPS) { | |
| 984 assert(!method.is_null() , "method should not be null"); | |
| 985 | |
| 986 KlassHandle recv_klass; // Default to NULL (use of ?: can confuse gcc) | |
| 987 if (recv.not_null()) recv_klass = KlassHandle(THREAD, recv->klass()); | |
| 988 KlassHandle spec_klass (THREAD, method->method_holder()); | |
| 989 symbolHandle name (THREAD, method->name()); | |
| 990 symbolHandle signature (THREAD, method->signature()); | |
| 991 CallInfo info; | |
| 992 LinkResolver::resolve_virtual_call(info, recv, recv_klass, spec_klass, name, signature, KlassHandle(), false, true, CHECK_(methodHandle())); | |
| 993 return info.selected_method(); | |
| 994 } | |
| 995 | |
| 996 | |
| 997 | |
| 998 static void jni_invoke_static(JNIEnv *env, JavaValue* result, jobject receiver, JNICallType call_type, jmethodID method_id, JNI_ArgumentPusher *args, TRAPS) { | |
| 999 methodHandle method(THREAD, JNIHandles::resolve_jmethod_id(method_id)); | |
| 1000 | |
| 1001 // Create object to hold arguments for the JavaCall, and associate it with | |
| 1002 // the jni parser | |
| 1003 ResourceMark rm(THREAD); | |
| 1004 int number_of_parameters = method->size_of_parameters(); | |
| 1005 JavaCallArguments java_args(number_of_parameters); | |
| 1006 args->set_java_argument_object(&java_args); | |
| 1007 | |
| 1008 assert(method->is_static(), "method should be static"); | |
| 1009 | |
| 1010 // Fill out JavaCallArguments object | |
| 1011 args->iterate( Fingerprinter(THREAD, method).fingerprint() ); | |
| 1012 // Initialize result type | |
| 1013 result->set_type(args->get_ret_type()); | |
| 1014 | |
| 1015 // Invoke the method. Result is returned as oop. | |
| 1016 JavaCalls::call(result, method, &java_args, CHECK); | |
| 1017 | |
| 1018 // Convert result | |
| 1019 if (result->get_type() == T_OBJECT || result->get_type() == T_ARRAY) { | |
| 1020 result->set_jobject(JNIHandles::make_local(env, (oop) result->get_jobject())); | |
| 1021 } | |
| 1022 } | |
| 1023 | |
| 1024 | |
| 1025 static void jni_invoke_nonstatic(JNIEnv *env, JavaValue* result, jobject receiver, JNICallType call_type, jmethodID method_id, JNI_ArgumentPusher *args, TRAPS) { | |
| 1026 oop recv = JNIHandles::resolve(receiver); | |
| 1027 if (recv == NULL) { | |
| 1028 THROW(vmSymbols::java_lang_NullPointerException()); | |
| 1029 } | |
| 1030 Handle h_recv(THREAD, recv); | |
| 1031 | |
| 1032 int number_of_parameters; | |
| 1033 methodOop selected_method; | |
| 1034 { | |
| 1035 methodOop m = JNIHandles::resolve_jmethod_id(method_id); | |
| 1036 number_of_parameters = m->size_of_parameters(); | |
| 1037 klassOop holder = m->method_holder(); | |
| 1038 if (!(Klass::cast(holder))->is_interface()) { | |
| 1039 // non-interface call -- for that little speed boost, don't handlize | |
| 1040 debug_only(No_Safepoint_Verifier nosafepoint;) | |
| 1041 if (call_type == JNI_VIRTUAL) { | |
| 1042 // jni_GetMethodID makes sure class is linked and initialized | |
| 1043 // so m should have a valid vtable index. | |
| 1044 int vtbl_index = m->vtable_index(); | |
| 1045 if (vtbl_index != methodOopDesc::nonvirtual_vtable_index) { | |
| 1046 klassOop k = h_recv->klass(); | |
| 1047 // k might be an arrayKlassOop but all vtables start at | |
| 1048 // the same place. The cast is to avoid virtual call and assertion. | |
| 1049 instanceKlass *ik = (instanceKlass*)k->klass_part(); | |
| 1050 selected_method = ik->method_at_vtable(vtbl_index); | |
| 1051 } else { | |
| 1052 // final method | |
| 1053 selected_method = m; | |
| 1054 } | |
| 1055 } else { | |
| 1056 // JNI_NONVIRTUAL call | |
| 1057 selected_method = m; | |
| 1058 } | |
| 1059 } else { | |
| 1060 // interface call | |
| 1061 KlassHandle h_holder(THREAD, holder); | |
| 1062 | |
| 1063 int itbl_index = m->cached_itable_index(); | |
| 1064 if (itbl_index == -1) { | |
| 1065 itbl_index = klassItable::compute_itable_index(m); | |
| 1066 m->set_cached_itable_index(itbl_index); | |
| 1067 // the above may have grabbed a lock, 'm' and anything non-handlized can't be used again | |
| 1068 } | |
| 1069 klassOop k = h_recv->klass(); | |
| 1070 selected_method = instanceKlass::cast(k)->method_at_itable(h_holder(), itbl_index, CHECK); | |
| 1071 } | |
| 1072 } | |
| 1073 | |
| 1074 methodHandle method(THREAD, selected_method); | |
| 1075 | |
| 1076 // Create object to hold arguments for the JavaCall, and associate it with | |
| 1077 // the jni parser | |
| 1078 ResourceMark rm(THREAD); | |
| 1079 JavaCallArguments java_args(number_of_parameters); | |
| 1080 args->set_java_argument_object(&java_args); | |
| 1081 | |
| 1082 // handle arguments | |
| 1083 assert(!method->is_static(), "method should not be static"); | |
| 1084 args->push_receiver(h_recv); // Push jobject handle | |
| 1085 | |
| 1086 // Fill out JavaCallArguments object | |
| 1087 args->iterate( Fingerprinter(THREAD, method).fingerprint() ); | |
| 1088 // Initialize result type | |
| 1089 result->set_type(args->get_ret_type()); | |
| 1090 | |
| 1091 // Invoke the method. Result is returned as oop. | |
| 1092 JavaCalls::call(result, method, &java_args, CHECK); | |
| 1093 | |
| 1094 // Convert result | |
| 1095 if (result->get_type() == T_OBJECT || result->get_type() == T_ARRAY) { | |
| 1096 result->set_jobject(JNIHandles::make_local(env, (oop) result->get_jobject())); | |
| 1097 } | |
| 1098 } | |
| 1099 | |
| 1100 | |
| 1101 static instanceOop alloc_object(jclass clazz, TRAPS) { | |
| 1102 KlassHandle k(THREAD, java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(clazz))); | |
| 1103 Klass::cast(k())->check_valid_for_instantiation(false, CHECK_NULL); | |
| 1104 instanceKlass::cast(k())->initialize(CHECK_NULL); | |
| 1105 instanceOop ih = instanceKlass::cast(k())->allocate_instance(THREAD); | |
| 1106 return ih; | |
| 1107 } | |
| 1108 | |
| 1109 DT_RETURN_MARK_DECL(AllocObject, jobject); | |
| 1110 | |
| 1111 JNI_ENTRY(jobject, jni_AllocObject(JNIEnv *env, jclass clazz)) | |
| 1112 JNIWrapper("AllocObject"); | |
| 1113 | |
| 1114 DTRACE_PROBE2(hotspot_jni, AllocObject__entry, env, clazz); | |
| 1115 jobject ret = NULL; | |
| 1116 DT_RETURN_MARK(AllocObject, jobject, (const jobject&)ret); | |
| 1117 | |
| 1118 instanceOop i = alloc_object(clazz, CHECK_NULL); | |
| 1119 ret = JNIHandles::make_local(env, i); | |
| 1120 return ret; | |
| 1121 JNI_END | |
| 1122 | |
| 1123 DT_RETURN_MARK_DECL(NewObjectA, jobject); | |
| 1124 | |
| 1125 JNI_ENTRY(jobject, jni_NewObjectA(JNIEnv *env, jclass clazz, jmethodID methodID, const jvalue *args)) | |
| 1126 JNIWrapper("NewObjectA"); | |
| 1127 DTRACE_PROBE3(hotspot_jni, NewObjectA__entry, env, clazz, methodID); | |
| 1128 jobject obj = NULL; | |
| 1129 DT_RETURN_MARK(NewObjectA, jobject, (const jobject)obj); | |
| 1130 | |
| 1131 instanceOop i = alloc_object(clazz, CHECK_NULL); | |
| 1132 obj = JNIHandles::make_local(env, i); | |
| 1133 JavaValue jvalue(T_VOID); | |
| 1134 JNI_ArgumentPusherArray ap(THREAD, methodID, args); | |
| 1135 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_NULL); | |
| 1136 return obj; | |
| 1137 JNI_END | |
| 1138 | |
| 1139 DT_RETURN_MARK_DECL(NewObjectV, jobject); | |
| 1140 | |
| 1141 JNI_ENTRY(jobject, jni_NewObjectV(JNIEnv *env, jclass clazz, jmethodID methodID, va_list args)) | |
| 1142 JNIWrapper("NewObjectV"); | |
| 1143 DTRACE_PROBE3(hotspot_jni, NewObjectV__entry, env, clazz, methodID); | |
| 1144 jobject obj = NULL; | |
| 1145 DT_RETURN_MARK(NewObjectV, jobject, (const jobject&)obj); | |
| 1146 | |
| 1147 instanceOop i = alloc_object(clazz, CHECK_NULL); | |
| 1148 obj = JNIHandles::make_local(env, i); | |
| 1149 JavaValue jvalue(T_VOID); | |
| 1150 JNI_ArgumentPusherVaArg ap(THREAD, methodID, args); | |
| 1151 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_NULL); | |
| 1152 return obj; | |
| 1153 JNI_END | |
| 1154 | |
| 1155 DT_RETURN_MARK_DECL(NewObject, jobject); | |
| 1156 | |
| 1157 JNI_ENTRY(jobject, jni_NewObject(JNIEnv *env, jclass clazz, jmethodID methodID, ...)) | |
| 1158 JNIWrapper("NewObject"); | |
| 1159 DTRACE_PROBE3(hotspot_jni, NewObject__entry, env, clazz, methodID); | |
| 1160 jobject obj = NULL; | |
| 1161 DT_RETURN_MARK(NewObject, jobject, (const jobject&)obj); | |
| 1162 | |
| 1163 instanceOop i = alloc_object(clazz, CHECK_NULL); | |
| 1164 obj = JNIHandles::make_local(env, i); | |
| 1165 va_list args; | |
| 1166 va_start(args, methodID); | |
| 1167 JavaValue jvalue(T_VOID); | |
| 1168 JNI_ArgumentPusherVaArg ap(THREAD, methodID, args); | |
| 1169 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_NULL); | |
| 1170 va_end(args); | |
| 1171 return obj; | |
| 1172 JNI_END | |
| 1173 | |
| 1174 | |
| 1175 JNI_ENTRY(jclass, jni_GetObjectClass(JNIEnv *env, jobject obj)) | |
| 1176 JNIWrapper("GetObjectClass"); | |
| 1177 DTRACE_PROBE2(hotspot_jni, GetObjectClass__entry, env, obj); | |
| 1178 klassOop k = JNIHandles::resolve_non_null(obj)->klass(); | |
| 1179 jclass ret = | |
| 1180 (jclass) JNIHandles::make_local(env, Klass::cast(k)->java_mirror()); | |
| 1181 DTRACE_PROBE1(hotspot_jni, GetObjectClass__return, ret); | |
| 1182 return ret; | |
| 1183 JNI_END | |
| 1184 | |
| 1185 JNI_QUICK_ENTRY(jboolean, jni_IsInstanceOf(JNIEnv *env, jobject obj, jclass clazz)) | |
| 1186 JNIWrapper("IsInstanceOf"); | |
| 1187 DTRACE_PROBE3(hotspot_jni, IsInstanceOf__entry, env, obj, clazz); | |
| 1188 jboolean ret = JNI_TRUE; | |
| 1189 if (obj != NULL) { | |
| 1190 ret = JNI_FALSE; | |
| 1191 klassOop k = java_lang_Class::as_klassOop( | |
| 1192 JNIHandles::resolve_non_null(clazz)); | |
| 1193 if (k != NULL) { | |
| 1194 ret = JNIHandles::resolve_non_null(obj)->is_a(k) ? JNI_TRUE : JNI_FALSE; | |
| 1195 } | |
| 1196 } | |
| 1197 DTRACE_PROBE1(hotspot_jni, IsInstanceOf__return, ret); | |
| 1198 return ret; | |
| 1199 JNI_END | |
| 1200 | |
| 1201 | |
| 1202 static jmethodID get_method_id(JNIEnv *env, jclass clazz, const char *name_str, | |
| 1203 const char *sig, bool is_static, TRAPS) { | |
| 1204 // %%%% This code should probably just call into a method in the LinkResolver | |
| 1205 // | |
| 1206 // The class should have been loaded (we have an instance of the class | |
| 1207 // passed in) so the method and signature should already be in the symbol | |
| 1208 // table. If they're not there, the method doesn't exist. | |
| 1209 symbolHandle signature = | |
| 1210 symbolHandle(THREAD, SymbolTable::probe(sig, (int)strlen(sig))); | |
| 1211 symbolHandle name; | |
| 1212 if (name_str == NULL) { | |
| 1213 name = vmSymbolHandles::object_initializer_name(); | |
| 1214 } else { | |
| 1215 name = symbolHandle(THREAD, | |
| 1216 SymbolTable::probe(name_str, (int)strlen(name_str))); | |
| 1217 } | |
| 1218 if (name.is_null() || signature.is_null()) { | |
| 1219 THROW_MSG_0(vmSymbols::java_lang_NoSuchMethodError(), name_str); | |
| 1220 } | |
| 1221 | |
| 1222 // Throw a NoSuchMethodError exception if we have an instance of a | |
| 1223 // primitive java.lang.Class | |
| 1224 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(clazz))) { | |
| 1225 THROW_MSG_0(vmSymbols::java_lang_NoSuchMethodError(), name_str); | |
| 1226 } | |
| 1227 | |
| 1228 KlassHandle klass(THREAD, | |
| 1229 java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(clazz))); | |
| 1230 | |
| 1231 // Make sure class is linked and initialized before handing id's out to | |
| 1232 // methodOops. | |
| 1233 Klass::cast(klass())->initialize(CHECK_NULL); | |
| 1234 | |
| 1235 methodOop m; | |
| 1236 if (name() == vmSymbols::object_initializer_name() || | |
| 1237 name() == vmSymbols::class_initializer_name()) { | |
| 1238 // Never search superclasses for constructors | |
| 1239 if (klass->oop_is_instance()) { | |
| 1240 m = instanceKlass::cast(klass())->find_method(name(), signature()); | |
| 1241 } else { | |
| 1242 m = NULL; | |
| 1243 } | |
| 1244 } else { | |
| 1245 m = klass->lookup_method(name(), signature()); | |
| 1246 // Look up interfaces | |
| 1247 if (m == NULL && klass->oop_is_instance()) { | |
| 1248 m = instanceKlass::cast(klass())->lookup_method_in_all_interfaces(name(), | |
| 1249 signature()); | |
| 1250 } | |
| 1251 } | |
| 1252 if (m == NULL || (m->is_static() != is_static)) { | |
| 1253 THROW_MSG_0(vmSymbols::java_lang_NoSuchMethodError(), name_str); | |
| 1254 } | |
| 1255 return m->jmethod_id(); | |
| 1256 } | |
| 1257 | |
| 1258 | |
| 1259 JNI_ENTRY(jmethodID, jni_GetMethodID(JNIEnv *env, jclass clazz, | |
| 1260 const char *name, const char *sig)) | |
| 1261 JNIWrapper("GetMethodID"); | |
| 1262 DTRACE_PROBE4(hotspot_jni, GetMethodID__entry, env, clazz, name, sig); | |
| 1263 jmethodID ret = get_method_id(env, clazz, name, sig, false, thread); | |
| 1264 DTRACE_PROBE1(hotspot_jni, GetMethodID__return, ret); | |
| 1265 return ret; | |
| 1266 JNI_END | |
| 1267 | |
| 1268 | |
| 1269 JNI_ENTRY(jmethodID, jni_GetStaticMethodID(JNIEnv *env, jclass clazz, | |
| 1270 const char *name, const char *sig)) | |
| 1271 JNIWrapper("GetStaticMethodID"); | |
| 1272 DTRACE_PROBE4(hotspot_jni, GetStaticMethodID__entry, env, clazz, name, sig); | |
| 1273 jmethodID ret = get_method_id(env, clazz, name, sig, true, thread); | |
| 1274 DTRACE_PROBE1(hotspot_jni, GetStaticMethodID__return, ret); | |
| 1275 return ret; | |
| 1276 JNI_END | |
| 1277 | |
| 1278 | |
| 1279 | |
| 1280 // | |
| 1281 // Calling Methods | |
| 1282 // | |
| 1283 | |
| 1284 | |
| 1285 #define DEFINE_CALLMETHOD(ResultType, Result, Tag) \ | |
| 1286 \ | |
| 1287 DT_RETURN_MARK_DECL_FOR(Result, Call##Result##Method, ResultType);\ | |
| 1288 DT_RETURN_MARK_DECL_FOR(Result, Call##Result##MethodV, ResultType);\ | |
| 1289 DT_RETURN_MARK_DECL_FOR(Result, Call##Result##MethodA, ResultType);\ | |
| 1290 \ | |
| 1291 JNI_ENTRY(ResultType, \ | |
| 1292 jni_Call##Result##Method(JNIEnv *env, jobject obj, jmethodID methodID, ...)) \ | |
| 1293 JNIWrapper("Call" XSTR(Result) "Method"); \ | |
| 1294 \ | |
| 1295 DTRACE_PROBE3(hotspot_jni, Call##Result##Method__entry, env, obj, methodID);\ | |
| 1296 ResultType ret = 0;\ | |
| 1297 DT_RETURN_MARK_FOR(Result, Call##Result##Method, ResultType, \ | |
| 1298 (const ResultType&)ret);\ | |
| 1299 \ | |
| 1300 va_list args; \ | |
| 1301 va_start(args, methodID); \ | |
| 1302 JavaValue jvalue(Tag); \ | |
| 1303 JNI_ArgumentPusherVaArg ap(THREAD, methodID, args); \ | |
| 1304 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK_0); \ | |
| 1305 va_end(args); \ | |
| 1306 ret = jvalue.get_##ResultType(); \ | |
| 1307 return ret;\ | |
| 1308 JNI_END \ | |
| 1309 \ | |
| 1310 \ | |
| 1311 JNI_ENTRY(ResultType, \ | |
| 1312 jni_Call##Result##MethodV(JNIEnv *env, jobject obj, jmethodID methodID, va_list args)) \ | |
| 1313 JNIWrapper("Call" XSTR(Result) "MethodV"); \ | |
| 1314 \ | |
| 1315 DTRACE_PROBE3(hotspot_jni, Call##Result##MethodV__entry, env, obj, methodID);\ | |
| 1316 ResultType ret = 0;\ | |
| 1317 DT_RETURN_MARK_FOR(Result, Call##Result##MethodV, ResultType, \ | |
| 1318 (const ResultType&)ret);\ | |
| 1319 \ | |
| 1320 JavaValue jvalue(Tag); \ | |
| 1321 JNI_ArgumentPusherVaArg ap(THREAD, methodID, args); \ | |
| 1322 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK_0); \ | |
| 1323 ret = jvalue.get_##ResultType(); \ | |
| 1324 return ret;\ | |
| 1325 JNI_END \ | |
| 1326 \ | |
| 1327 \ | |
| 1328 JNI_ENTRY(ResultType, \ | |
| 1329 jni_Call##Result##MethodA(JNIEnv *env, jobject obj, jmethodID methodID, const jvalue *args)) \ | |
| 1330 JNIWrapper("Call" XSTR(Result) "MethodA"); \ | |
| 1331 DTRACE_PROBE3(hotspot_jni, Call##Result##MethodA__entry, env, obj, methodID);\ | |
| 1332 ResultType ret = 0;\ | |
| 1333 DT_RETURN_MARK_FOR(Result, Call##Result##MethodA, ResultType, \ | |
| 1334 (const ResultType&)ret);\ | |
| 1335 \ | |
| 1336 JavaValue jvalue(Tag); \ | |
| 1337 JNI_ArgumentPusherArray ap(THREAD, methodID, args); \ | |
| 1338 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK_0); \ | |
| 1339 ret = jvalue.get_##ResultType(); \ | |
| 1340 return ret;\ | |
| 1341 JNI_END | |
| 1342 | |
| 1343 // the runtime type of subword integral basic types is integer | |
| 1344 DEFINE_CALLMETHOD(jboolean, Boolean, T_BOOLEAN) | |
| 1345 DEFINE_CALLMETHOD(jbyte, Byte, T_BYTE) | |
| 1346 DEFINE_CALLMETHOD(jchar, Char, T_CHAR) | |
| 1347 DEFINE_CALLMETHOD(jshort, Short, T_SHORT) | |
| 1348 | |
| 1349 DEFINE_CALLMETHOD(jobject, Object, T_OBJECT) | |
| 1350 DEFINE_CALLMETHOD(jint, Int, T_INT) | |
| 1351 DEFINE_CALLMETHOD(jlong, Long, T_LONG) | |
| 1352 DEFINE_CALLMETHOD(jfloat, Float, T_FLOAT) | |
| 1353 DEFINE_CALLMETHOD(jdouble, Double, T_DOUBLE) | |
| 1354 | |
| 1355 DT_VOID_RETURN_MARK_DECL(CallVoidMethod); | |
| 1356 DT_VOID_RETURN_MARK_DECL(CallVoidMethodV); | |
| 1357 DT_VOID_RETURN_MARK_DECL(CallVoidMethodA); | |
| 1358 | |
| 1359 JNI_ENTRY(void, jni_CallVoidMethod(JNIEnv *env, jobject obj, jmethodID methodID, ...)) | |
| 1360 JNIWrapper("CallVoidMethod"); | |
| 1361 DTRACE_PROBE3(hotspot_jni, CallVoidMethod__entry, env, obj, methodID); | |
| 1362 DT_VOID_RETURN_MARK(CallVoidMethod); | |
| 1363 | |
| 1364 va_list args; | |
| 1365 va_start(args, methodID); | |
| 1366 JavaValue jvalue(T_VOID); | |
| 1367 JNI_ArgumentPusherVaArg ap(THREAD, methodID, args); | |
| 1368 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK); | |
| 1369 va_end(args); | |
| 1370 JNI_END | |
| 1371 | |
| 1372 | |
| 1373 JNI_ENTRY(void, jni_CallVoidMethodV(JNIEnv *env, jobject obj, jmethodID methodID, va_list args)) | |
| 1374 JNIWrapper("CallVoidMethodV"); | |
| 1375 DTRACE_PROBE3(hotspot_jni, CallVoidMethodV__entry, env, obj, methodID); | |
| 1376 DT_VOID_RETURN_MARK(CallVoidMethodV); | |
| 1377 | |
| 1378 JavaValue jvalue(T_VOID); | |
| 1379 JNI_ArgumentPusherVaArg ap(THREAD, methodID, args); | |
| 1380 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK); | |
| 1381 JNI_END | |
| 1382 | |
| 1383 | |
| 1384 JNI_ENTRY(void, jni_CallVoidMethodA(JNIEnv *env, jobject obj, jmethodID methodID, const jvalue *args)) | |
| 1385 JNIWrapper("CallVoidMethodA"); | |
| 1386 DTRACE_PROBE3(hotspot_jni, CallVoidMethodA__entry, env, obj, methodID); | |
| 1387 DT_VOID_RETURN_MARK(CallVoidMethodA); | |
| 1388 | |
| 1389 JavaValue jvalue(T_VOID); | |
| 1390 JNI_ArgumentPusherArray ap(THREAD, methodID, args); | |
| 1391 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK); | |
| 1392 JNI_END | |
| 1393 | |
| 1394 | |
| 1395 #define DEFINE_CALLNONVIRTUALMETHOD(ResultType, Result, Tag) \ | |
| 1396 \ | |
| 1397 DT_RETURN_MARK_DECL_FOR(Result, CallNonvirtual##Result##Method, ResultType);\ | |
| 1398 DT_RETURN_MARK_DECL_FOR(Result, CallNonvirtual##Result##MethodV, ResultType);\ | |
| 1399 DT_RETURN_MARK_DECL_FOR(Result, CallNonvirtual##Result##MethodA, ResultType);\ | |
| 1400 \ | |
| 1401 JNI_ENTRY(ResultType, \ | |
| 1402 jni_CallNonvirtual##Result##Method(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, ...)) \ | |
| 1403 JNIWrapper("CallNonvitual" XSTR(Result) "Method"); \ | |
| 1404 \ | |
| 1405 DTRACE_PROBE4(hotspot_jni, CallNonvirtual##Result##Method__entry, env, obj, cls, methodID);\ | |
| 1406 ResultType ret;\ | |
| 1407 DT_RETURN_MARK_FOR(Result, CallNonvirtual##Result##Method, ResultType, \ | |
| 1408 (const ResultType&)ret);\ | |
| 1409 \ | |
| 1410 va_list args; \ | |
| 1411 va_start(args, methodID); \ | |
| 1412 JavaValue jvalue(Tag); \ | |
| 1413 JNI_ArgumentPusherVaArg ap(THREAD, methodID, args); \ | |
| 1414 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_0); \ | |
| 1415 va_end(args); \ | |
| 1416 ret = jvalue.get_##ResultType(); \ | |
| 1417 return ret;\ | |
| 1418 JNI_END \ | |
| 1419 \ | |
| 1420 JNI_ENTRY(ResultType, \ | |
| 1421 jni_CallNonvirtual##Result##MethodV(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, va_list args)) \ | |
| 1422 JNIWrapper("CallNonvitual" XSTR(Result) "#MethodV"); \ | |
| 1423 DTRACE_PROBE4(hotspot_jni, CallNonvirtual##Result##MethodV__entry, env, obj, cls, methodID);\ | |
| 1424 ResultType ret;\ | |
| 1425 DT_RETURN_MARK_FOR(Result, CallNonvirtual##Result##MethodV, ResultType, \ | |
| 1426 (const ResultType&)ret);\ | |
| 1427 \ | |
| 1428 JavaValue jvalue(Tag); \ | |
| 1429 JNI_ArgumentPusherVaArg ap(THREAD, methodID, args); \ | |
| 1430 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_0); \ | |
| 1431 ret = jvalue.get_##ResultType(); \ | |
| 1432 return ret;\ | |
| 1433 JNI_END \ | |
| 1434 \ | |
| 1435 JNI_ENTRY(ResultType, \ | |
| 1436 jni_CallNonvirtual##Result##MethodA(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, const jvalue *args)) \ | |
| 1437 JNIWrapper("CallNonvitual" XSTR(Result) "MethodA"); \ | |
| 1438 DTRACE_PROBE4(hotspot_jni, CallNonvirtual##Result##MethodA__entry, env, obj, cls, methodID);\ | |
| 1439 ResultType ret;\ | |
| 1440 DT_RETURN_MARK_FOR(Result, CallNonvirtual##Result##MethodA, ResultType, \ | |
| 1441 (const ResultType&)ret);\ | |
| 1442 \ | |
| 1443 JavaValue jvalue(Tag); \ | |
| 1444 JNI_ArgumentPusherArray ap(THREAD, methodID, args); \ | |
| 1445 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_0); \ | |
| 1446 ret = jvalue.get_##ResultType(); \ | |
| 1447 return ret;\ | |
| 1448 JNI_END | |
| 1449 | |
| 1450 // the runtime type of subword integral basic types is integer | |
| 1451 DEFINE_CALLNONVIRTUALMETHOD(jboolean, Boolean, T_BOOLEAN) | |
| 1452 DEFINE_CALLNONVIRTUALMETHOD(jbyte, Byte, T_BYTE) | |
| 1453 DEFINE_CALLNONVIRTUALMETHOD(jchar, Char, T_CHAR) | |
| 1454 DEFINE_CALLNONVIRTUALMETHOD(jshort, Short, T_SHORT) | |
| 1455 | |
| 1456 DEFINE_CALLNONVIRTUALMETHOD(jobject, Object, T_OBJECT) | |
| 1457 DEFINE_CALLNONVIRTUALMETHOD(jint, Int, T_INT) | |
| 1458 DEFINE_CALLNONVIRTUALMETHOD(jlong, Long, T_LONG) | |
| 1459 DEFINE_CALLNONVIRTUALMETHOD(jfloat, Float, T_FLOAT) | |
| 1460 DEFINE_CALLNONVIRTUALMETHOD(jdouble, Double, T_DOUBLE) | |
| 1461 | |
| 1462 | |
| 1463 DT_VOID_RETURN_MARK_DECL(CallNonvirtualVoidMethod); | |
| 1464 DT_VOID_RETURN_MARK_DECL(CallNonvirtualVoidMethodV); | |
| 1465 DT_VOID_RETURN_MARK_DECL(CallNonvirtualVoidMethodA); | |
| 1466 | |
| 1467 JNI_ENTRY(void, jni_CallNonvirtualVoidMethod(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, ...)) | |
| 1468 JNIWrapper("CallNonvirtualVoidMethod"); | |
| 1469 | |
| 1470 DTRACE_PROBE4(hotspot_jni, CallNonvirtualVoidMethod__entry, | |
| 1471 env, obj, cls, methodID); | |
| 1472 DT_VOID_RETURN_MARK(CallNonvirtualVoidMethod); | |
| 1473 | |
| 1474 va_list args; | |
| 1475 va_start(args, methodID); | |
| 1476 JavaValue jvalue(T_VOID); | |
| 1477 JNI_ArgumentPusherVaArg ap(THREAD, methodID, args); | |
| 1478 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK); | |
| 1479 va_end(args); | |
| 1480 JNI_END | |
| 1481 | |
| 1482 | |
| 1483 JNI_ENTRY(void, jni_CallNonvirtualVoidMethodV(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, va_list args)) | |
| 1484 JNIWrapper("CallNonvirtualVoidMethodV"); | |
| 1485 | |
| 1486 DTRACE_PROBE4(hotspot_jni, CallNonvirtualVoidMethodV__entry, | |
| 1487 env, obj, cls, methodID); | |
| 1488 DT_VOID_RETURN_MARK(CallNonvirtualVoidMethodV); | |
| 1489 | |
| 1490 JavaValue jvalue(T_VOID); | |
| 1491 JNI_ArgumentPusherVaArg ap(THREAD, methodID, args); | |
| 1492 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK); | |
| 1493 JNI_END | |
| 1494 | |
| 1495 | |
| 1496 JNI_ENTRY(void, jni_CallNonvirtualVoidMethodA(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, const jvalue *args)) | |
| 1497 JNIWrapper("CallNonvirtualVoidMethodA"); | |
| 1498 DTRACE_PROBE4(hotspot_jni, CallNonvirtualVoidMethodA__entry, | |
| 1499 env, obj, cls, methodID); | |
| 1500 DT_VOID_RETURN_MARK(CallNonvirtualVoidMethodA); | |
| 1501 JavaValue jvalue(T_VOID); | |
| 1502 JNI_ArgumentPusherArray ap(THREAD, methodID, args); | |
| 1503 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK); | |
| 1504 JNI_END | |
| 1505 | |
| 1506 | |
| 1507 #define DEFINE_CALLSTATICMETHOD(ResultType, Result, Tag) \ | |
| 1508 \ | |
| 1509 DT_RETURN_MARK_DECL_FOR(Result, CallStatic##Result##Method, ResultType);\ | |
| 1510 DT_RETURN_MARK_DECL_FOR(Result, CallStatic##Result##MethodV, ResultType);\ | |
| 1511 DT_RETURN_MARK_DECL_FOR(Result, CallStatic##Result##MethodA, ResultType);\ | |
| 1512 \ | |
| 1513 JNI_ENTRY(ResultType, \ | |
| 1514 jni_CallStatic##Result##Method(JNIEnv *env, jclass cls, jmethodID methodID, ...)) \ | |
| 1515 JNIWrapper("CallStatic" XSTR(Result) "Method"); \ | |
| 1516 \ | |
| 1517 DTRACE_PROBE3(hotspot_jni, CallStatic##Result##Method__entry, env, cls, methodID);\ | |
| 1518 ResultType ret = 0;\ | |
| 1519 DT_RETURN_MARK_FOR(Result, CallStatic##Result##Method, ResultType, \ | |
| 1520 (const ResultType&)ret);\ | |
| 1521 \ | |
| 1522 va_list args; \ | |
| 1523 va_start(args, methodID); \ | |
| 1524 JavaValue jvalue(Tag); \ | |
| 1525 JNI_ArgumentPusherVaArg ap(THREAD, methodID, args); \ | |
| 1526 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK_0); \ | |
| 1527 va_end(args); \ | |
| 1528 ret = jvalue.get_##ResultType(); \ | |
| 1529 return ret;\ | |
| 1530 JNI_END \ | |
| 1531 \ | |
| 1532 JNI_ENTRY(ResultType, \ | |
| 1533 jni_CallStatic##Result##MethodV(JNIEnv *env, jclass cls, jmethodID methodID, va_list args)) \ | |
| 1534 JNIWrapper("CallStatic" XSTR(Result) "MethodV"); \ | |
| 1535 DTRACE_PROBE3(hotspot_jni, CallStatic##Result##MethodV__entry, env, cls, methodID);\ | |
| 1536 ResultType ret = 0;\ | |
| 1537 DT_RETURN_MARK_FOR(Result, CallStatic##Result##MethodV, ResultType, \ | |
| 1538 (const ResultType&)ret);\ | |
| 1539 \ | |
| 1540 JavaValue jvalue(Tag); \ | |
| 1541 JNI_ArgumentPusherVaArg ap(THREAD, methodID, args); \ | |
| 1542 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK_0); \ | |
| 1543 ret = jvalue.get_##ResultType(); \ | |
| 1544 return ret;\ | |
| 1545 JNI_END \ | |
| 1546 \ | |
| 1547 JNI_ENTRY(ResultType, \ | |
| 1548 jni_CallStatic##Result##MethodA(JNIEnv *env, jclass cls, jmethodID methodID, const jvalue *args)) \ | |
| 1549 JNIWrapper("CallStatic" XSTR(Result) "MethodA"); \ | |
| 1550 DTRACE_PROBE3(hotspot_jni, CallStatic##Result##MethodA__entry, env, cls, methodID);\ | |
| 1551 ResultType ret = 0;\ | |
| 1552 DT_RETURN_MARK_FOR(Result, CallStatic##Result##MethodA, ResultType, \ | |
| 1553 (const ResultType&)ret);\ | |
| 1554 \ | |
| 1555 JavaValue jvalue(Tag); \ | |
| 1556 JNI_ArgumentPusherArray ap(THREAD, methodID, args); \ | |
| 1557 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK_0); \ | |
| 1558 ret = jvalue.get_##ResultType(); \ | |
| 1559 return ret;\ | |
| 1560 JNI_END | |
| 1561 | |
| 1562 // the runtime type of subword integral basic types is integer | |
| 1563 DEFINE_CALLSTATICMETHOD(jboolean, Boolean, T_BOOLEAN) | |
| 1564 DEFINE_CALLSTATICMETHOD(jbyte, Byte, T_BYTE) | |
| 1565 DEFINE_CALLSTATICMETHOD(jchar, Char, T_CHAR) | |
| 1566 DEFINE_CALLSTATICMETHOD(jshort, Short, T_SHORT) | |
| 1567 | |
| 1568 DEFINE_CALLSTATICMETHOD(jobject, Object, T_OBJECT) | |
| 1569 DEFINE_CALLSTATICMETHOD(jint, Int, T_INT) | |
| 1570 DEFINE_CALLSTATICMETHOD(jlong, Long, T_LONG) | |
| 1571 DEFINE_CALLSTATICMETHOD(jfloat, Float, T_FLOAT) | |
| 1572 DEFINE_CALLSTATICMETHOD(jdouble, Double, T_DOUBLE) | |
| 1573 | |
| 1574 | |
| 1575 DT_VOID_RETURN_MARK_DECL(CallStaticVoidMethod); | |
| 1576 DT_VOID_RETURN_MARK_DECL(CallStaticVoidMethodV); | |
| 1577 DT_VOID_RETURN_MARK_DECL(CallStaticVoidMethodA); | |
| 1578 | |
| 1579 JNI_ENTRY(void, jni_CallStaticVoidMethod(JNIEnv *env, jclass cls, jmethodID methodID, ...)) | |
| 1580 JNIWrapper("CallStaticVoidMethod"); | |
| 1581 DTRACE_PROBE3(hotspot_jni, CallStaticVoidMethod__entry, env, cls, methodID); | |
| 1582 DT_VOID_RETURN_MARK(CallStaticVoidMethod); | |
| 1583 | |
| 1584 va_list args; | |
| 1585 va_start(args, methodID); | |
| 1586 JavaValue jvalue(T_VOID); | |
| 1587 JNI_ArgumentPusherVaArg ap(THREAD, methodID, args); | |
| 1588 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK); | |
| 1589 va_end(args); | |
| 1590 JNI_END | |
| 1591 | |
| 1592 | |
| 1593 JNI_ENTRY(void, jni_CallStaticVoidMethodV(JNIEnv *env, jclass cls, jmethodID methodID, va_list args)) | |
| 1594 JNIWrapper("CallStaticVoidMethodV"); | |
| 1595 DTRACE_PROBE3(hotspot_jni, CallStaticVoidMethodV__entry, env, cls, methodID); | |
| 1596 DT_VOID_RETURN_MARK(CallStaticVoidMethodV); | |
| 1597 | |
| 1598 JavaValue jvalue(T_VOID); | |
| 1599 JNI_ArgumentPusherVaArg ap(THREAD, methodID, args); | |
| 1600 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK); | |
| 1601 JNI_END | |
| 1602 | |
| 1603 | |
| 1604 JNI_ENTRY(void, jni_CallStaticVoidMethodA(JNIEnv *env, jclass cls, jmethodID methodID, const jvalue *args)) | |
| 1605 JNIWrapper("CallStaticVoidMethodA"); | |
| 1606 DTRACE_PROBE3(hotspot_jni, CallStaticVoidMethodA__entry, env, cls, methodID); | |
| 1607 DT_VOID_RETURN_MARK(CallStaticVoidMethodA); | |
| 1608 | |
| 1609 JavaValue jvalue(T_VOID); | |
| 1610 JNI_ArgumentPusherArray ap(THREAD, methodID, args); | |
| 1611 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK); | |
| 1612 JNI_END | |
| 1613 | |
| 1614 | |
| 1615 // | |
| 1616 // Accessing Fields | |
| 1617 // | |
| 1618 | |
| 1619 | |
| 1620 DT_RETURN_MARK_DECL(GetFieldID, jfieldID); | |
| 1621 | |
| 1622 JNI_ENTRY(jfieldID, jni_GetFieldID(JNIEnv *env, jclass clazz, | |
| 1623 const char *name, const char *sig)) | |
| 1624 JNIWrapper("GetFieldID"); | |
| 1625 DTRACE_PROBE4(hotspot_jni, GetFieldID__entry, env, clazz, name, sig); | |
| 1626 jfieldID ret = 0; | |
| 1627 DT_RETURN_MARK(GetFieldID, jfieldID, (const jfieldID&)ret); | |
| 1628 | |
| 1629 // The class should have been loaded (we have an instance of the class | |
| 1630 // passed in) so the field and signature should already be in the symbol | |
| 1631 // table. If they're not there, the field doesn't exist. | |
| 1632 symbolHandle fieldname = | |
| 1633 symbolHandle(THREAD, SymbolTable::probe(name, (int)strlen(name))); | |
| 1634 symbolHandle signame = | |
| 1635 symbolHandle(THREAD, SymbolTable::probe(sig, (int)strlen(sig))); | |
| 1636 if (fieldname.is_null() || signame.is_null()) { | |
| 1637 THROW_MSG_0(vmSymbols::java_lang_NoSuchFieldError(), (char*) name); | |
| 1638 } | |
| 1639 KlassHandle k(THREAD, | |
| 1640 java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(clazz))); | |
| 1641 // Make sure class is initialized before handing id's out to fields | |
| 1642 Klass::cast(k())->initialize(CHECK_NULL); | |
| 1643 | |
| 1644 fieldDescriptor fd; | |
| 1645 if (!Klass::cast(k())->oop_is_instance() || | |
| 1646 !instanceKlass::cast(k())->find_field(fieldname(), signame(), false, &fd)) { | |
| 1647 THROW_MSG_0(vmSymbols::java_lang_NoSuchFieldError(), (char*) name); | |
| 1648 } | |
| 1649 | |
| 1650 // A jfieldID for a non-static field is simply the offset of the field within the instanceOop | |
| 1651 // It may also have hash bits for k, if VerifyJNIFields is turned on. | |
| 1652 ret = jfieldIDWorkaround::to_instance_jfieldID(k(), fd.offset()); | |
| 1653 return ret; | |
| 1654 JNI_END | |
| 1655 | |
| 1656 | |
| 1657 JNI_ENTRY(jobject, jni_GetObjectField(JNIEnv *env, jobject obj, jfieldID fieldID)) | |
| 1658 JNIWrapper("GetObjectField"); | |
| 1659 DTRACE_PROBE3(hotspot_jni, GetObjectField__entry, env, obj, fieldID); | |
| 1660 oop o = JNIHandles::resolve_non_null(obj); | |
| 1661 klassOop k = o->klass(); | |
| 1662 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID); | |
| 1663 // Keep JVMTI addition small and only check enabled flag here. | |
| 1664 // jni_GetField_probe() assumes that is okay to create handles. | |
| 1665 if (JvmtiExport::should_post_field_access()) { | |
| 1666 o = JvmtiExport::jni_GetField_probe(thread, obj, o, k, fieldID, false); | |
| 1667 } | |
| 1668 jobject ret = JNIHandles::make_local(env, o->obj_field(offset)); | |
| 1669 DTRACE_PROBE1(hotspot_jni, GetObjectField__return, ret); | |
| 1670 return ret; | |
| 1671 JNI_END | |
| 1672 | |
| 1673 | |
| 1674 #define DEFINE_GETFIELD(Return,Fieldname,Result) \ | |
| 1675 \ | |
| 1676 DT_RETURN_MARK_DECL_FOR(Result, Get##Result##Field, Return);\ | |
| 1677 \ | |
| 1678 JNI_QUICK_ENTRY(Return, jni_Get##Result##Field(JNIEnv *env, jobject obj, jfieldID fieldID)) \ | |
| 1679 JNIWrapper("Get" XSTR(Result) "Field"); \ | |
| 1680 \ | |
| 1681 DTRACE_PROBE3(hotspot_jni, Get##Result##Field__entry, env, obj, fieldID);\ | |
| 1682 Return ret = 0;\ | |
| 1683 DT_RETURN_MARK_FOR(Result, Get##Result##Field, Return, (const Return&)ret);\ | |
| 1684 \ | |
| 1685 oop o = JNIHandles::resolve_non_null(obj); \ | |
| 1686 klassOop k = o->klass(); \ | |
| 1687 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID); \ | |
| 1688 /* Keep JVMTI addition small and only check enabled flag here. */ \ | |
| 1689 /* jni_GetField_probe_nh() assumes that is not okay to create handles */ \ | |
| 1690 /* and creates a ResetNoHandleMark. */ \ | |
| 1691 if (JvmtiExport::should_post_field_access()) { \ | |
| 1692 o = JvmtiExport::jni_GetField_probe_nh(thread, obj, o, k, fieldID, false); \ | |
| 1693 } \ | |
| 1694 ret = o->Fieldname##_field(offset); \ | |
| 1695 return ret; \ | |
| 1696 JNI_END | |
| 1697 | |
| 1698 DEFINE_GETFIELD(jboolean, bool, Boolean) | |
| 1699 DEFINE_GETFIELD(jbyte, byte, Byte) | |
| 1700 DEFINE_GETFIELD(jchar, char, Char) | |
| 1701 DEFINE_GETFIELD(jshort, short, Short) | |
| 1702 DEFINE_GETFIELD(jint, int, Int) | |
| 1703 DEFINE_GETFIELD(jlong, long, Long) | |
| 1704 DEFINE_GETFIELD(jfloat, float, Float) | |
| 1705 DEFINE_GETFIELD(jdouble, double, Double) | |
| 1706 | |
| 1707 address jni_GetBooleanField_addr() { | |
| 1708 return (address)jni_GetBooleanField; | |
| 1709 } | |
| 1710 address jni_GetByteField_addr() { | |
| 1711 return (address)jni_GetByteField; | |
| 1712 } | |
| 1713 address jni_GetCharField_addr() { | |
| 1714 return (address)jni_GetCharField; | |
| 1715 } | |
| 1716 address jni_GetShortField_addr() { | |
| 1717 return (address)jni_GetShortField; | |
| 1718 } | |
| 1719 address jni_GetIntField_addr() { | |
| 1720 return (address)jni_GetIntField; | |
| 1721 } | |
| 1722 address jni_GetLongField_addr() { | |
| 1723 return (address)jni_GetLongField; | |
| 1724 } | |
| 1725 address jni_GetFloatField_addr() { | |
| 1726 return (address)jni_GetFloatField; | |
| 1727 } | |
| 1728 address jni_GetDoubleField_addr() { | |
| 1729 return (address)jni_GetDoubleField; | |
| 1730 } | |
| 1731 | |
| 1732 JNI_QUICK_ENTRY(void, jni_SetObjectField(JNIEnv *env, jobject obj, jfieldID fieldID, jobject value)) | |
| 1733 JNIWrapper("SetObjectField"); | |
| 1734 DTRACE_PROBE4(hotspot_jni, SetObjectField__entry, env, obj, fieldID, value); | |
| 1735 oop o = JNIHandles::resolve_non_null(obj); | |
| 1736 klassOop k = o->klass(); | |
| 1737 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID); | |
| 1738 // Keep JVMTI addition small and only check enabled flag here. | |
| 1739 // jni_SetField_probe_nh() assumes that is not okay to create handles | |
| 1740 // and creates a ResetNoHandleMark. | |
| 1741 if (JvmtiExport::should_post_field_modification()) { | |
| 1742 jvalue field_value; | |
| 1743 field_value.l = value; | |
| 1744 o = JvmtiExport::jni_SetField_probe_nh(thread, obj, o, k, fieldID, false, 'L', (jvalue *)&field_value); | |
| 1745 } | |
| 1746 o->obj_field_put(offset, JNIHandles::resolve(value)); | |
| 1747 DTRACE_PROBE(hotspot_jni, SetObjectField__return); | |
| 1748 JNI_END | |
| 1749 | |
| 1750 #define DEFINE_SETFIELD(Argument,Fieldname,Result,SigType,unionType) \ | |
| 1751 \ | |
| 1752 JNI_QUICK_ENTRY(void, jni_Set##Result##Field(JNIEnv *env, jobject obj, jfieldID fieldID, Argument value)) \ | |
| 1753 JNIWrapper("Set" XSTR(Result) "Field"); \ | |
| 1754 \ | |
| 1755 HS_DTRACE_PROBE_CDECL_N(hotspot_jni, Set##Result##Field__entry, \ | |
| 1756 ( JNIEnv*, jobject, jfieldID FP_SELECT_##Result(COMMA Argument,/*empty*/) ) ); \ | |
| 1757 HS_DTRACE_PROBE_N(hotspot_jni, Set##Result##Field__entry, \ | |
| 1758 ( env, obj, fieldID FP_SELECT_##Result(COMMA value,/*empty*/) ) ); \ | |
| 1759 \ | |
| 1760 oop o = JNIHandles::resolve_non_null(obj); \ | |
| 1761 klassOop k = o->klass(); \ | |
| 1762 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID); \ | |
| 1763 /* Keep JVMTI addition small and only check enabled flag here. */ \ | |
| 1764 /* jni_SetField_probe_nh() assumes that is not okay to create handles */ \ | |
| 1765 /* and creates a ResetNoHandleMark. */ \ | |
| 1766 if (JvmtiExport::should_post_field_modification()) { \ | |
| 1767 jvalue field_value; \ | |
| 1768 field_value.unionType = value; \ | |
| 1769 o = JvmtiExport::jni_SetField_probe_nh(thread, obj, o, k, fieldID, false, SigType, (jvalue *)&field_value); \ | |
| 1770 } \ | |
| 1771 o->Fieldname##_field_put(offset, value); \ | |
| 1772 DTRACE_PROBE(hotspot_jni, Set##Result##Field__return);\ | |
| 1773 JNI_END | |
| 1774 | |
| 1775 DEFINE_SETFIELD(jboolean, bool, Boolean, 'Z', z) | |
| 1776 DEFINE_SETFIELD(jbyte, byte, Byte, 'B', b) | |
| 1777 DEFINE_SETFIELD(jchar, char, Char, 'C', c) | |
| 1778 DEFINE_SETFIELD(jshort, short, Short, 'S', s) | |
| 1779 DEFINE_SETFIELD(jint, int, Int, 'I', i) | |
| 1780 DEFINE_SETFIELD(jlong, long, Long, 'J', j) | |
| 1781 DEFINE_SETFIELD(jfloat, float, Float, 'F', f) | |
| 1782 DEFINE_SETFIELD(jdouble, double, Double, 'D', d) | |
| 1783 | |
| 1784 DT_RETURN_MARK_DECL(ToReflectedField, jobject); | |
| 1785 | |
| 1786 JNI_ENTRY(jobject, jni_ToReflectedField(JNIEnv *env, jclass cls, jfieldID fieldID, jboolean isStatic)) | |
| 1787 JNIWrapper("ToReflectedField"); | |
| 1788 DTRACE_PROBE4(hotspot_jni, ToReflectedField__entry, | |
| 1789 env, cls, fieldID, isStatic); | |
| 1790 jobject ret = NULL; | |
| 1791 DT_RETURN_MARK(ToReflectedField, jobject, (const jobject&)ret); | |
| 1792 | |
| 1793 fieldDescriptor fd; | |
| 1794 bool found = false; | |
| 1795 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); | |
| 1796 | |
| 1797 assert(jfieldIDWorkaround::is_static_jfieldID(fieldID) == (isStatic != 0), "invalid fieldID"); | |
| 1798 | |
| 1799 if (isStatic) { | |
| 1800 // Static field. The fieldID a JNIid specifying the field holder and the offset within the klassOop. | |
| 1801 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID); | |
| 1802 assert(id->is_static_field_id(), "invalid static field id"); | |
| 1803 found = instanceKlass::cast(id->holder())->find_local_field_from_offset(id->offset(), true, &fd); | |
| 1804 } else { | |
| 1805 // Non-static field. The fieldID is really the offset of the field within the instanceOop. | |
| 1806 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID); | |
| 1807 found = instanceKlass::cast(k)->find_field_from_offset(offset, false, &fd); | |
| 1808 } | |
| 1809 assert(found, "bad fieldID passed into jni_ToReflectedField"); | |
| 1810 oop reflected = Reflection::new_field(&fd, UseNewReflection, CHECK_NULL); | |
| 1811 ret = JNIHandles::make_local(env, reflected); | |
| 1812 return ret; | |
| 1813 JNI_END | |
| 1814 | |
| 1815 | |
| 1816 // | |
| 1817 // Accessing Static Fields | |
| 1818 // | |
| 1819 DT_RETURN_MARK_DECL(GetStaticFieldID, jfieldID); | |
| 1820 | |
| 1821 JNI_ENTRY(jfieldID, jni_GetStaticFieldID(JNIEnv *env, jclass clazz, | |
| 1822 const char *name, const char *sig)) | |
| 1823 JNIWrapper("GetStaticFieldID"); | |
| 1824 DTRACE_PROBE4(hotspot_jni, GetStaticFieldID__entry, env, clazz, name, sig); | |
| 1825 jfieldID ret = NULL; | |
| 1826 DT_RETURN_MARK(GetStaticFieldID, jfieldID, (const jfieldID&)ret); | |
| 1827 | |
| 1828 // The class should have been loaded (we have an instance of the class | |
| 1829 // passed in) so the field and signature should already be in the symbol | |
| 1830 // table. If they're not there, the field doesn't exist. | |
| 1831 symbolHandle fieldname = | |
| 1832 symbolHandle(THREAD, SymbolTable::probe(name, (int)strlen(name))); | |
| 1833 symbolHandle signame = | |
| 1834 symbolHandle(THREAD, SymbolTable::probe(sig, (int)strlen(sig))); | |
| 1835 if (fieldname.is_null() || signame.is_null()) { | |
| 1836 THROW_MSG_0(vmSymbols::java_lang_NoSuchFieldError(), (char*) name); | |
| 1837 } | |
| 1838 KlassHandle k(THREAD, | |
| 1839 java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(clazz))); | |
| 1840 // Make sure class is initialized before handing id's out to static fields | |
| 1841 Klass::cast(k())->initialize(CHECK_NULL); | |
| 1842 | |
| 1843 fieldDescriptor fd; | |
| 1844 if (!Klass::cast(k())->oop_is_instance() || | |
| 1845 !instanceKlass::cast(k())->find_field(fieldname(), signame(), true, &fd)) { | |
| 1846 THROW_MSG_0(vmSymbols::java_lang_NoSuchFieldError(), (char*) name); | |
| 1847 } | |
| 1848 | |
| 1849 // A jfieldID for a static field is a JNIid specifying the field holder and the offset within the klassOop | |
| 1850 JNIid* id = instanceKlass::cast(fd.field_holder())->jni_id_for(fd.offset()); | |
| 1851 debug_only(id->set_is_static_field_id();) | |
| 1852 | |
| 1853 debug_only(int first_offset = instanceKlass::cast(fd.field_holder())->offset_of_static_fields();) | |
| 1854 debug_only(int end_offset = first_offset + (instanceKlass::cast(fd.field_holder())->static_field_size() * wordSize);) | |
| 1855 assert(id->offset() >= first_offset && id->offset() < end_offset, "invalid static field offset"); | |
| 1856 | |
| 1857 ret = jfieldIDWorkaround::to_static_jfieldID(id); | |
| 1858 return ret; | |
| 1859 JNI_END | |
| 1860 | |
| 1861 | |
| 1862 JNI_ENTRY(jobject, jni_GetStaticObjectField(JNIEnv *env, jclass clazz, jfieldID fieldID)) | |
| 1863 JNIWrapper("GetStaticObjectField"); | |
| 1864 DTRACE_PROBE3(hotspot_jni, GetStaticObjectField__entry, env, clazz, fieldID); | |
| 1865 #ifndef JNICHECK_KERNEL | |
| 1866 DEBUG_ONLY(klassOop param_k = jniCheck::validate_class(thread, clazz);) | |
| 1867 #endif // JNICHECK_KERNEL | |
| 1868 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID); | |
| 1869 assert(id->is_static_field_id(), "invalid static field id"); | |
| 1870 // Keep JVMTI addition small and only check enabled flag here. | |
| 1871 // jni_GetField_probe() assumes that is okay to create handles. | |
| 1872 if (JvmtiExport::should_post_field_access()) { | |
| 1873 JvmtiExport::jni_GetField_probe(thread, NULL, NULL, id->holder(), fieldID, true); | |
| 1874 } | |
| 1875 jobject ret = JNIHandles::make_local(id->holder()->obj_field(id->offset())); | |
| 1876 DTRACE_PROBE1(hotspot_jni, GetStaticObjectField__return, ret); | |
| 1877 return ret; | |
| 1878 JNI_END | |
| 1879 | |
| 1880 #define DEFINE_GETSTATICFIELD(Return,Fieldname,Result) \ | |
| 1881 \ | |
| 1882 DT_RETURN_MARK_DECL_FOR(Result, GetStatic##Result##Field, Return);\ | |
| 1883 \ | |
| 1884 JNI_ENTRY(Return, jni_GetStatic##Result##Field(JNIEnv *env, jclass clazz, jfieldID fieldID)) \ | |
| 1885 JNIWrapper("GetStatic" XSTR(Result) "Field"); \ | |
| 1886 DTRACE_PROBE3(hotspot_jni, GetStatic##Result##Field__entry, env, clazz, fieldID);\ | |
| 1887 Return ret = 0;\ | |
| 1888 DT_RETURN_MARK_FOR(Result, GetStatic##Result##Field, Return, \ | |
| 1889 (const Return&)ret);\ | |
| 1890 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID); \ | |
| 1891 assert(id->is_static_field_id(), "invalid static field id"); \ | |
| 1892 /* Keep JVMTI addition small and only check enabled flag here. */ \ | |
| 1893 /* jni_GetField_probe() assumes that is okay to create handles. */ \ | |
| 1894 if (JvmtiExport::should_post_field_access()) { \ | |
| 1895 JvmtiExport::jni_GetField_probe(thread, NULL, NULL, id->holder(), fieldID, true); \ | |
| 1896 } \ | |
| 1897 ret = id->holder()-> Fieldname##_field (id->offset()); \ | |
| 1898 return ret;\ | |
| 1899 JNI_END | |
| 1900 | |
| 1901 DEFINE_GETSTATICFIELD(jboolean, bool, Boolean) | |
| 1902 DEFINE_GETSTATICFIELD(jbyte, byte, Byte) | |
| 1903 DEFINE_GETSTATICFIELD(jchar, char, Char) | |
| 1904 DEFINE_GETSTATICFIELD(jshort, short, Short) | |
| 1905 DEFINE_GETSTATICFIELD(jint, int, Int) | |
| 1906 DEFINE_GETSTATICFIELD(jlong, long, Long) | |
| 1907 DEFINE_GETSTATICFIELD(jfloat, float, Float) | |
| 1908 DEFINE_GETSTATICFIELD(jdouble, double, Double) | |
| 1909 | |
| 1910 | |
| 1911 JNI_ENTRY(void, jni_SetStaticObjectField(JNIEnv *env, jclass clazz, jfieldID fieldID, jobject value)) | |
| 1912 JNIWrapper("SetStaticObjectField"); | |
| 1913 DTRACE_PROBE4(hotspot_jni, SetStaticObjectField__entry, env, clazz, fieldID, value); | |
| 1914 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID); | |
| 1915 assert(id->is_static_field_id(), "invalid static field id"); | |
| 1916 // Keep JVMTI addition small and only check enabled flag here. | |
| 1917 // jni_SetField_probe() assumes that is okay to create handles. | |
| 1918 if (JvmtiExport::should_post_field_modification()) { | |
| 1919 jvalue field_value; | |
| 1920 field_value.l = value; | |
| 1921 JvmtiExport::jni_SetField_probe(thread, NULL, NULL, id->holder(), fieldID, true, 'L', (jvalue *)&field_value); | |
| 1922 } | |
| 1923 id->holder()->obj_field_put(id->offset(), JNIHandles::resolve(value)); | |
| 1924 DTRACE_PROBE(hotspot_jni, SetStaticObjectField__return); | |
| 1925 JNI_END | |
| 1926 | |
| 1927 | |
| 1928 #define DEFINE_SETSTATICFIELD(Argument,Fieldname,Result,SigType,unionType) \ | |
| 1929 \ | |
| 1930 JNI_ENTRY(void, jni_SetStatic##Result##Field(JNIEnv *env, jclass clazz, jfieldID fieldID, Argument value)) \ | |
| 1931 JNIWrapper("SetStatic" XSTR(Result) "Field"); \ | |
| 1932 HS_DTRACE_PROBE_CDECL_N(hotspot_jni, SetStatic##Result##Field__entry,\ | |
| 1933 ( JNIEnv*, jclass, jfieldID FP_SELECT_##Result(COMMA Argument,/*empty*/) ) ); \ | |
| 1934 HS_DTRACE_PROBE_N(hotspot_jni, SetStatic##Result##Field__entry, \ | |
| 1935 ( env, clazz, fieldID FP_SELECT_##Result(COMMA value,/*empty*/) ) ); \ | |
| 1936 \ | |
| 1937 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID); \ | |
| 1938 assert(id->is_static_field_id(), "invalid static field id"); \ | |
| 1939 /* Keep JVMTI addition small and only check enabled flag here. */ \ | |
| 1940 /* jni_SetField_probe() assumes that is okay to create handles. */ \ | |
| 1941 if (JvmtiExport::should_post_field_modification()) { \ | |
| 1942 jvalue field_value; \ | |
| 1943 field_value.unionType = value; \ | |
| 1944 JvmtiExport::jni_SetField_probe(thread, NULL, NULL, id->holder(), fieldID, true, SigType, (jvalue *)&field_value); \ | |
| 1945 } \ | |
| 1946 id->holder()-> Fieldname##_field_put (id->offset(), value); \ | |
| 1947 DTRACE_PROBE(hotspot_jni, SetStatic##Result##Field__return);\ | |
| 1948 JNI_END | |
| 1949 | |
| 1950 DEFINE_SETSTATICFIELD(jboolean, bool, Boolean, 'Z', z) | |
| 1951 DEFINE_SETSTATICFIELD(jbyte, byte, Byte, 'B', b) | |
| 1952 DEFINE_SETSTATICFIELD(jchar, char, Char, 'C', c) | |
| 1953 DEFINE_SETSTATICFIELD(jshort, short, Short, 'S', s) | |
| 1954 DEFINE_SETSTATICFIELD(jint, int, Int, 'I', i) | |
| 1955 DEFINE_SETSTATICFIELD(jlong, long, Long, 'J', j) | |
| 1956 DEFINE_SETSTATICFIELD(jfloat, float, Float, 'F', f) | |
| 1957 DEFINE_SETSTATICFIELD(jdouble, double, Double, 'D', d) | |
| 1958 | |
| 1959 | |
| 1960 // | |
| 1961 // String Operations | |
| 1962 // | |
| 1963 | |
| 1964 // Unicode Interface | |
| 1965 | |
| 1966 DT_RETURN_MARK_DECL(NewString, jstring); | |
| 1967 | |
| 1968 JNI_ENTRY(jstring, jni_NewString(JNIEnv *env, const jchar *unicodeChars, jsize len)) | |
| 1969 JNIWrapper("NewString"); | |
| 1970 DTRACE_PROBE3(hotspot_jni, NewString__entry, env, unicodeChars, len); | |
| 1971 jstring ret = NULL; | |
| 1972 DT_RETURN_MARK(NewString, jstring, (const jstring&)ret); | |
| 1973 oop string=java_lang_String::create_oop_from_unicode((jchar*) unicodeChars, len, CHECK_NULL); | |
| 1974 ret = (jstring) JNIHandles::make_local(env, string); | |
| 1975 return ret; | |
| 1976 JNI_END | |
| 1977 | |
| 1978 | |
| 1979 JNI_QUICK_ENTRY(jsize, jni_GetStringLength(JNIEnv *env, jstring string)) | |
| 1980 JNIWrapper("GetStringLength"); | |
| 1981 DTRACE_PROBE2(hotspot_jni, GetStringLength__entry, env, string); | |
| 1982 jsize ret = java_lang_String::length(JNIHandles::resolve_non_null(string)); | |
| 1983 DTRACE_PROBE1(hotspot_jni, GetStringLength__return, ret); | |
| 1984 return ret; | |
| 1985 JNI_END | |
| 1986 | |
| 1987 | |
| 1988 JNI_QUICK_ENTRY(const jchar*, jni_GetStringChars( | |
| 1989 JNIEnv *env, jstring string, jboolean *isCopy)) | |
| 1990 JNIWrapper("GetStringChars"); | |
| 1991 DTRACE_PROBE3(hotspot_jni, GetStringChars__entry, env, string, isCopy); | |
| 1992 //%note jni_5 | |
| 1993 if (isCopy != NULL) { | |
| 1994 *isCopy = JNI_TRUE; | |
| 1995 } | |
| 1996 oop s = JNIHandles::resolve_non_null(string); | |
| 1997 int s_len = java_lang_String::length(s); | |
| 1998 typeArrayOop s_value = java_lang_String::value(s); | |
| 1999 int s_offset = java_lang_String::offset(s); | |
| 2000 jchar* buf = NEW_C_HEAP_ARRAY(jchar, s_len + 1); // add one for zero termination | |
| 2001 if (s_len > 0) { | |
| 2002 memcpy(buf, s_value->char_at_addr(s_offset), sizeof(jchar)*s_len); | |
| 2003 } | |
| 2004 buf[s_len] = 0; | |
| 2005 DTRACE_PROBE1(hotspot_jni, GetStringChars__return, buf); | |
| 2006 return buf; | |
| 2007 JNI_END | |
| 2008 | |
| 2009 | |
| 2010 JNI_QUICK_ENTRY(void, jni_ReleaseStringChars(JNIEnv *env, jstring str, const jchar *chars)) | |
| 2011 JNIWrapper("ReleaseStringChars"); | |
| 2012 DTRACE_PROBE3(hotspot_jni, ReleaseStringChars__entry, env, str, chars); | |
| 2013 //%note jni_6 | |
| 2014 if (chars != NULL) { | |
| 2015 // Since String objects are supposed to be immutable, don't copy any | |
| 2016 // new data back. A bad user will have to go after the char array. | |
| 2017 FreeHeap((void*) chars); | |
| 2018 } | |
| 2019 DTRACE_PROBE(hotspot_jni, ReleaseStringChars__return); | |
| 2020 JNI_END | |
| 2021 | |
| 2022 | |
| 2023 // UTF Interface | |
| 2024 | |
| 2025 DT_RETURN_MARK_DECL(NewStringUTF, jstring); | |
| 2026 | |
| 2027 JNI_ENTRY(jstring, jni_NewStringUTF(JNIEnv *env, const char *bytes)) | |
| 2028 JNIWrapper("NewStringUTF"); | |
| 2029 DTRACE_PROBE2(hotspot_jni, NewStringUTF__entry, env, bytes); | |
| 2030 jstring ret; | |
| 2031 DT_RETURN_MARK(NewStringUTF, jstring, (const jstring&)ret); | |
| 2032 | |
| 2033 oop result = java_lang_String::create_oop_from_str((char*) bytes, CHECK_NULL); | |
| 2034 ret = (jstring) JNIHandles::make_local(env, result); | |
| 2035 return ret; | |
| 2036 JNI_END | |
| 2037 | |
| 2038 | |
| 2039 JNI_ENTRY(jsize, jni_GetStringUTFLength(JNIEnv *env, jstring string)) | |
| 2040 JNIWrapper("GetStringUTFLength"); | |
| 2041 DTRACE_PROBE2(hotspot_jni, GetStringUTFLength__entry, env, string); | |
| 2042 jsize ret = java_lang_String::utf8_length(JNIHandles::resolve_non_null(string)); | |
| 2043 DTRACE_PROBE1(hotspot_jni, GetStringUTFLength__return, ret); | |
| 2044 return ret; | |
| 2045 JNI_END | |
| 2046 | |
| 2047 | |
| 2048 JNI_ENTRY(const char*, jni_GetStringUTFChars(JNIEnv *env, jstring string, jboolean *isCopy)) | |
| 2049 JNIWrapper("GetStringUTFChars"); | |
| 2050 DTRACE_PROBE3(hotspot_jni, GetStringUTFChars__entry, env, string, isCopy); | |
| 2051 ResourceMark rm; | |
| 2052 char* str = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(string)); | |
| 2053 int length = (int)strlen(str); | |
| 2054 char* result = AllocateHeap(length+1, "GetStringUTFChars"); | |
| 2055 strcpy(result, str); | |
| 2056 if (isCopy != NULL) *isCopy = JNI_TRUE; | |
| 2057 DTRACE_PROBE1(hotspot_jni, GetStringUTFChars__return, result); | |
| 2058 return result; | |
| 2059 JNI_END | |
| 2060 | |
| 2061 | |
| 2062 JNI_LEAF(void, jni_ReleaseStringUTFChars(JNIEnv *env, jstring str, const char *chars)) | |
| 2063 JNIWrapper("ReleaseStringUTFChars"); | |
| 2064 DTRACE_PROBE3(hotspot_jni, ReleaseStringUTFChars__entry, env, str, chars); | |
| 2065 if (chars != NULL) { | |
| 2066 FreeHeap((char*) chars); | |
| 2067 } | |
| 2068 DTRACE_PROBE(hotspot_jni, ReleaseStringUTFChars__return); | |
| 2069 JNI_END | |
| 2070 | |
| 2071 | |
| 2072 JNI_QUICK_ENTRY(jsize, jni_GetArrayLength(JNIEnv *env, jarray array)) | |
| 2073 JNIWrapper("GetArrayLength"); | |
| 2074 DTRACE_PROBE2(hotspot_jni, GetArrayLength__entry, env, array); | |
| 2075 arrayOop a = arrayOop(JNIHandles::resolve_non_null(array)); | |
| 2076 assert(a->is_array(), "must be array"); | |
| 2077 jsize ret = a->length(); | |
| 2078 DTRACE_PROBE1(hotspot_jni, GetArrayLength__return, ret); | |
| 2079 return ret; | |
| 2080 JNI_END | |
| 2081 | |
| 2082 | |
| 2083 // | |
| 2084 // Object Array Operations | |
| 2085 // | |
| 2086 | |
| 2087 DT_RETURN_MARK_DECL(NewObjectArray, jobjectArray); | |
| 2088 | |
| 2089 JNI_ENTRY(jobjectArray, jni_NewObjectArray(JNIEnv *env, jsize length, jclass elementClass, jobject initialElement)) | |
| 2090 JNIWrapper("NewObjectArray"); | |
| 2091 DTRACE_PROBE4(hotspot_jni, NewObjectArray__entry, env, length, elementClass, initialElement); | |
| 2092 jobjectArray ret = NULL; | |
| 2093 DT_RETURN_MARK(NewObjectArray, jobjectArray, (const jobjectArray&)ret); | |
| 2094 KlassHandle ek(THREAD, java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(elementClass))); | |
| 2095 klassOop ako = Klass::cast(ek())->array_klass(CHECK_NULL); | |
| 2096 KlassHandle ak = KlassHandle(THREAD, ako); | |
| 2097 objArrayKlass::cast(ak())->initialize(CHECK_NULL); | |
| 2098 objArrayOop result = objArrayKlass::cast(ak())->allocate(length, CHECK_NULL); | |
| 2099 oop initial_value = JNIHandles::resolve(initialElement); | |
| 2100 if (initial_value != NULL) { // array already initialized with NULL | |
| 2101 for (int index = 0; index < length; index++) { | |
| 2102 result->obj_at_put(index, initial_value); | |
| 2103 } | |
| 2104 } | |
| 2105 ret = (jobjectArray) JNIHandles::make_local(env, result); | |
| 2106 return ret; | |
| 2107 JNI_END | |
| 2108 | |
| 2109 DT_RETURN_MARK_DECL(GetObjectArrayElement, jobject); | |
| 2110 | |
| 2111 JNI_ENTRY(jobject, jni_GetObjectArrayElement(JNIEnv *env, jobjectArray array, jsize index)) | |
| 2112 JNIWrapper("GetObjectArrayElement"); | |
| 2113 DTRACE_PROBE3(hotspot_jni, GetObjectArrayElement__entry, env, array, index); | |
| 2114 jobject ret = NULL; | |
| 2115 DT_RETURN_MARK(GetObjectArrayElement, jobject, (const jobject&)ret); | |
| 2116 objArrayOop a = objArrayOop(JNIHandles::resolve_non_null(array)); | |
| 2117 if (a->is_within_bounds(index)) { | |
| 2118 jobject ret = JNIHandles::make_local(env, a->obj_at(index)); | |
| 2119 return ret; | |
| 2120 } else { | |
| 2121 char buf[jintAsStringSize]; | |
| 2122 sprintf(buf, "%d", index); | |
| 2123 THROW_MSG_0(vmSymbols::java_lang_ArrayIndexOutOfBoundsException(), buf); | |
| 2124 } | |
| 2125 JNI_END | |
| 2126 | |
| 2127 DT_VOID_RETURN_MARK_DECL(SetObjectArrayElement); | |
| 2128 | |
| 2129 JNI_ENTRY(void, jni_SetObjectArrayElement(JNIEnv *env, jobjectArray array, jsize index, jobject value)) | |
| 2130 JNIWrapper("SetObjectArrayElement"); | |
| 2131 DTRACE_PROBE4(hotspot_jni, SetObjectArrayElement__entry, env, array, index, value); | |
| 2132 DT_VOID_RETURN_MARK(SetObjectArrayElement); | |
| 2133 | |
| 2134 objArrayOop a = objArrayOop(JNIHandles::resolve_non_null(array)); | |
| 2135 oop v = JNIHandles::resolve(value); | |
| 2136 if (a->is_within_bounds(index)) { | |
| 2137 if (v == NULL || v->is_a(objArrayKlass::cast(a->klass())->element_klass())) { | |
| 2138 a->obj_at_put(index, v); | |
| 2139 } else { | |
| 2140 THROW(vmSymbols::java_lang_ArrayStoreException()); | |
| 2141 } | |
| 2142 } else { | |
| 2143 char buf[jintAsStringSize]; | |
| 2144 sprintf(buf, "%d", index); | |
| 2145 THROW_MSG(vmSymbols::java_lang_ArrayIndexOutOfBoundsException(), buf); | |
| 2146 } | |
| 2147 JNI_END | |
| 2148 | |
| 2149 | |
| 2150 #define DEFINE_NEWSCALARARRAY(Return,Allocator,Result) \ | |
| 2151 \ | |
| 2152 DT_RETURN_MARK_DECL_FOR(Result, New##Result##Array, Return);\ | |
| 2153 \ | |
| 2154 JNI_ENTRY(Return, \ | |
| 2155 jni_New##Result##Array(JNIEnv *env, jsize len)) \ | |
| 2156 JNIWrapper("New" XSTR(Result) "Array"); \ | |
| 2157 DTRACE_PROBE2(hotspot_jni, New##Result##Array__entry, env, len);\ | |
| 2158 Return ret = NULL;\ | |
| 2159 DT_RETURN_MARK_FOR(Result, New##Result##Array, Return, (const Return&)ret);\ | |
| 2160 \ | |
| 2161 oop obj= oopFactory::Allocator(len, CHECK_0); \ | |
| 2162 ret = (Return) JNIHandles::make_local(env, obj); \ | |
| 2163 return ret;\ | |
| 2164 JNI_END | |
| 2165 | |
| 2166 DEFINE_NEWSCALARARRAY(jbooleanArray, new_boolArray, Boolean) | |
| 2167 DEFINE_NEWSCALARARRAY(jbyteArray, new_byteArray, Byte) | |
| 2168 DEFINE_NEWSCALARARRAY(jshortArray, new_shortArray, Short) | |
| 2169 DEFINE_NEWSCALARARRAY(jcharArray, new_charArray, Char) | |
| 2170 DEFINE_NEWSCALARARRAY(jintArray, new_intArray, Int) | |
| 2171 DEFINE_NEWSCALARARRAY(jlongArray, new_longArray, Long) | |
| 2172 DEFINE_NEWSCALARARRAY(jfloatArray, new_singleArray, Float) | |
| 2173 DEFINE_NEWSCALARARRAY(jdoubleArray, new_doubleArray, Double) | |
| 2174 | |
| 2175 | |
| 2176 // Return an address which will fault if the caller writes to it. | |
| 2177 | |
| 2178 static char* get_bad_address() { | |
| 2179 static char* bad_address = NULL; | |
| 2180 if (bad_address == NULL) { | |
| 2181 size_t size = os::vm_allocation_granularity(); | |
| 2182 bad_address = os::reserve_memory(size); | |
| 2183 if (bad_address != NULL) { | |
|
477
24fda36852ce
6727377: VM stack guard pages on Windows should PAGE_READWRITE not PAGE_EXECUTE_READWRITE
coleenp
parents:
237
diff
changeset
|
2184 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
|
2185 /*is_committed*/false); |
| 0 | 2186 } |
| 2187 } | |
| 2188 return bad_address; | |
| 2189 } | |
| 2190 | |
| 2191 | |
| 2192 #define DEFINE_GETSCALARARRAYELEMENTS(ElementTag,ElementType,Result, Tag) \ | |
| 2193 \ | |
| 2194 JNI_QUICK_ENTRY(ElementType*, \ | |
| 2195 jni_Get##Result##ArrayElements(JNIEnv *env, ElementType##Array array, jboolean *isCopy)) \ | |
| 2196 JNIWrapper("Get" XSTR(Result) "ArrayElements"); \ | |
| 2197 DTRACE_PROBE3(hotspot_jni, Get##Result##ArrayElements__entry, env, array, isCopy);\ | |
| 2198 /* allocate an chunk of memory in c land */ \ | |
| 2199 typeArrayOop a = typeArrayOop(JNIHandles::resolve_non_null(array)); \ | |
| 2200 ElementType* result; \ | |
| 2201 int len = a->length(); \ | |
| 2202 if (len == 0) { \ | |
| 2203 /* Empty array: legal but useless, can't return NULL. \ | |
| 2204 * Return a pointer to something useless. \ | |
| 2205 * Avoid asserts in typeArrayOop. */ \ | |
| 2206 result = (ElementType*)get_bad_address(); \ | |
| 2207 } else { \ | |
| 2208 result = NEW_C_HEAP_ARRAY(ElementType, len); \ | |
| 2209 /* copy the array to the c chunk */ \ | |
| 2210 memcpy(result, a->Tag##_at_addr(0), sizeof(ElementType)*len); \ | |
| 2211 } \ | |
| 2212 if (isCopy) *isCopy = JNI_TRUE; \ | |
| 2213 DTRACE_PROBE1(hotspot_jni, Get##Result##ArrayElements__return, result);\ | |
| 2214 return result; \ | |
| 2215 JNI_END | |
| 2216 | |
| 2217 DEFINE_GETSCALARARRAYELEMENTS(T_BOOLEAN, jboolean, Boolean, bool) | |
| 2218 DEFINE_GETSCALARARRAYELEMENTS(T_BYTE, jbyte, Byte, byte) | |
| 2219 DEFINE_GETSCALARARRAYELEMENTS(T_SHORT, jshort, Short, short) | |
| 2220 DEFINE_GETSCALARARRAYELEMENTS(T_CHAR, jchar, Char, char) | |
| 2221 DEFINE_GETSCALARARRAYELEMENTS(T_INT, jint, Int, int) | |
| 2222 DEFINE_GETSCALARARRAYELEMENTS(T_LONG, jlong, Long, long) | |
| 2223 DEFINE_GETSCALARARRAYELEMENTS(T_FLOAT, jfloat, Float, float) | |
| 2224 DEFINE_GETSCALARARRAYELEMENTS(T_DOUBLE, jdouble, Double, double) | |
| 2225 | |
| 2226 | |
| 2227 #define DEFINE_RELEASESCALARARRAYELEMENTS(ElementTag,ElementType,Result,Tag) \ | |
| 2228 \ | |
| 2229 JNI_QUICK_ENTRY(void, \ | |
| 2230 jni_Release##Result##ArrayElements(JNIEnv *env, ElementType##Array array, \ | |
| 2231 ElementType *buf, jint mode)) \ | |
| 2232 JNIWrapper("Release" XSTR(Result) "ArrayElements"); \ | |
| 2233 DTRACE_PROBE4(hotspot_jni, Release##Result##ArrayElements__entry, env, array, buf, mode);\ | |
| 2234 typeArrayOop a = typeArrayOop(JNIHandles::resolve_non_null(array)); \ | |
| 2235 int len = a->length(); \ | |
| 2236 if (len != 0) { /* Empty array: nothing to free or copy. */ \ | |
| 2237 if ((mode == 0) || (mode == JNI_COMMIT)) { \ | |
| 2238 memcpy(a->Tag##_at_addr(0), buf, sizeof(ElementType)*len); \ | |
| 2239 } \ | |
| 2240 if ((mode == 0) || (mode == JNI_ABORT)) { \ | |
| 2241 FreeHeap(buf); \ | |
| 2242 } \ | |
| 2243 } \ | |
| 2244 DTRACE_PROBE(hotspot_jni, Release##Result##ArrayElements__return);\ | |
| 2245 JNI_END | |
| 2246 | |
| 2247 DEFINE_RELEASESCALARARRAYELEMENTS(T_BOOLEAN, jboolean, Boolean, bool) | |
| 2248 DEFINE_RELEASESCALARARRAYELEMENTS(T_BYTE, jbyte, Byte, byte) | |
| 2249 DEFINE_RELEASESCALARARRAYELEMENTS(T_SHORT, jshort, Short, short) | |
| 2250 DEFINE_RELEASESCALARARRAYELEMENTS(T_CHAR, jchar, Char, char) | |
| 2251 DEFINE_RELEASESCALARARRAYELEMENTS(T_INT, jint, Int, int) | |
| 2252 DEFINE_RELEASESCALARARRAYELEMENTS(T_LONG, jlong, Long, long) | |
| 2253 DEFINE_RELEASESCALARARRAYELEMENTS(T_FLOAT, jfloat, Float, float) | |
| 2254 DEFINE_RELEASESCALARARRAYELEMENTS(T_DOUBLE, jdouble, Double, double) | |
| 2255 | |
| 2256 #define DEFINE_GETSCALARARRAYREGION(ElementTag,ElementType,Result, Tag) \ | |
| 2257 DT_VOID_RETURN_MARK_DECL(Get##Result##ArrayRegion);\ | |
| 2258 \ | |
| 2259 JNI_ENTRY(void, \ | |
| 2260 jni_Get##Result##ArrayRegion(JNIEnv *env, ElementType##Array array, jsize start, \ | |
| 2261 jsize len, ElementType *buf)) \ | |
| 2262 JNIWrapper("Get" XSTR(Result) "ArrayRegion"); \ | |
| 2263 DTRACE_PROBE5(hotspot_jni, Get##Result##ArrayRegion__entry, env, array, start, len, buf);\ | |
| 2264 DT_VOID_RETURN_MARK(Get##Result##ArrayRegion); \ | |
| 2265 typeArrayOop src = typeArrayOop(JNIHandles::resolve_non_null(array)); \ | |
| 2266 if (start < 0 || len < 0 || ((unsigned int)start + (unsigned int)len > (unsigned int)src->length())) { \ | |
| 2267 THROW(vmSymbols::java_lang_ArrayIndexOutOfBoundsException()); \ | |
| 2268 } else { \ | |
| 2269 if (len > 0) { \ | |
| 2270 int sc = typeArrayKlass::cast(src->klass())->log2_element_size(); \ | |
| 2271 memcpy((u_char*) buf, \ | |
| 2272 (u_char*) src->Tag##_at_addr(start), \ | |
| 2273 len << sc); \ | |
| 2274 } \ | |
| 2275 } \ | |
| 2276 JNI_END | |
| 2277 | |
| 2278 DEFINE_GETSCALARARRAYREGION(T_BOOLEAN, jboolean,Boolean, bool) | |
| 2279 DEFINE_GETSCALARARRAYREGION(T_BYTE, jbyte, Byte, byte) | |
| 2280 DEFINE_GETSCALARARRAYREGION(T_SHORT, jshort, Short, short) | |
| 2281 DEFINE_GETSCALARARRAYREGION(T_CHAR, jchar, Char, char) | |
| 2282 DEFINE_GETSCALARARRAYREGION(T_INT, jint, Int, int) | |
| 2283 DEFINE_GETSCALARARRAYREGION(T_LONG, jlong, Long, long) | |
| 2284 DEFINE_GETSCALARARRAYREGION(T_FLOAT, jfloat, Float, float) | |
| 2285 DEFINE_GETSCALARARRAYREGION(T_DOUBLE, jdouble, Double, double) | |
| 2286 | |
| 2287 #define DEFINE_SETSCALARARRAYREGION(ElementTag,ElementType,Result, Tag) \ | |
| 2288 DT_VOID_RETURN_MARK_DECL(Set##Result##ArrayRegion);\ | |
| 2289 \ | |
| 2290 JNI_ENTRY(void, \ | |
| 2291 jni_Set##Result##ArrayRegion(JNIEnv *env, ElementType##Array array, jsize start, \ | |
| 2292 jsize len, const ElementType *buf)) \ | |
| 2293 JNIWrapper("Set" XSTR(Result) "ArrayRegion"); \ | |
| 2294 DTRACE_PROBE5(hotspot_jni, Set##Result##ArrayRegion__entry, env, array, start, len, buf);\ | |
| 2295 DT_VOID_RETURN_MARK(Set##Result##ArrayRegion); \ | |
| 2296 typeArrayOop dst = typeArrayOop(JNIHandles::resolve_non_null(array)); \ | |
| 2297 if (start < 0 || len < 0 || ((unsigned int)start + (unsigned int)len > (unsigned int)dst->length())) { \ | |
| 2298 THROW(vmSymbols::java_lang_ArrayIndexOutOfBoundsException()); \ | |
| 2299 } else { \ | |
| 2300 if (len > 0) { \ | |
| 2301 int sc = typeArrayKlass::cast(dst->klass())->log2_element_size(); \ | |
| 2302 memcpy((u_char*) dst->Tag##_at_addr(start), \ | |
| 2303 (u_char*) buf, \ | |
| 2304 len << sc); \ | |
| 2305 } \ | |
| 2306 } \ | |
| 2307 JNI_END | |
| 2308 | |
| 2309 DEFINE_SETSCALARARRAYREGION(T_BOOLEAN, jboolean, Boolean, bool) | |
| 2310 DEFINE_SETSCALARARRAYREGION(T_BYTE, jbyte, Byte, byte) | |
| 2311 DEFINE_SETSCALARARRAYREGION(T_SHORT, jshort, Short, short) | |
| 2312 DEFINE_SETSCALARARRAYREGION(T_CHAR, jchar, Char, char) | |
| 2313 DEFINE_SETSCALARARRAYREGION(T_INT, jint, Int, int) | |
| 2314 DEFINE_SETSCALARARRAYREGION(T_LONG, jlong, Long, long) | |
| 2315 DEFINE_SETSCALARARRAYREGION(T_FLOAT, jfloat, Float, float) | |
| 2316 DEFINE_SETSCALARARRAYREGION(T_DOUBLE, jdouble, Double, double) | |
| 2317 | |
| 2318 | |
| 2319 // | |
| 2320 // Interception of natives | |
| 2321 // | |
| 2322 | |
| 2323 // The RegisterNatives call being attempted tried to register with a method that | |
| 2324 // is not native. Ask JVM TI what prefixes have been specified. Then check | |
| 2325 // to see if the native method is now wrapped with the prefixes. See the | |
| 2326 // SetNativeMethodPrefix(es) functions in the JVM TI Spec for details. | |
| 2327 static methodOop find_prefixed_native(KlassHandle k, | |
| 2328 symbolHandle name, symbolHandle signature, TRAPS) { | |
| 2329 ResourceMark rm(THREAD); | |
| 2330 methodOop method; | |
| 2331 int name_len = name->utf8_length(); | |
| 2332 char* name_str = name->as_utf8(); | |
| 2333 int prefix_count; | |
| 2334 char** prefixes = JvmtiExport::get_all_native_method_prefixes(&prefix_count); | |
| 2335 for (int i = 0; i < prefix_count; i++) { | |
| 2336 char* prefix = prefixes[i]; | |
| 2337 int prefix_len = (int)strlen(prefix); | |
| 2338 | |
| 2339 // try adding this prefix to the method name and see if it matches another method name | |
| 2340 int trial_len = name_len + prefix_len; | |
| 2341 char* trial_name_str = NEW_RESOURCE_ARRAY(char, trial_len + 1); | |
| 2342 strcpy(trial_name_str, prefix); | |
| 2343 strcat(trial_name_str, name_str); | |
| 2344 symbolHandle trial_name(THREAD, SymbolTable::probe(trial_name_str, trial_len)); | |
| 2345 if (trial_name.is_null()) { | |
| 2346 continue; // no such symbol, so this prefix wasn't used, try the next prefix | |
| 2347 } | |
| 2348 method = Klass::cast(k())->lookup_method(trial_name(), signature()); | |
| 2349 if (method == NULL) { | |
| 2350 continue; // signature doesn't match, try the next prefix | |
| 2351 } | |
| 2352 if (method->is_native()) { | |
| 2353 method->set_is_prefixed_native(); | |
| 2354 return method; // wahoo, we found a prefixed version of the method, return it | |
| 2355 } | |
| 2356 // found as non-native, so prefix is good, add it, probably just need more prefixes | |
| 2357 name_len = trial_len; | |
| 2358 name_str = trial_name_str; | |
| 2359 } | |
| 2360 return NULL; // not found | |
| 2361 } | |
| 2362 | |
| 2363 static bool register_native(KlassHandle k, symbolHandle name, symbolHandle signature, address entry, TRAPS) { | |
| 2364 methodOop method = Klass::cast(k())->lookup_method(name(), signature()); | |
| 2365 if (method == NULL) { | |
| 2366 ResourceMark rm; | |
| 2367 stringStream st; | |
| 2368 st.print("Method %s name or signature does not match", | |
| 2369 methodOopDesc::name_and_sig_as_C_string(Klass::cast(k()), name(), signature())); | |
| 2370 THROW_MSG_(vmSymbols::java_lang_NoSuchMethodError(), st.as_string(), false); | |
| 2371 } | |
| 2372 if (!method->is_native()) { | |
| 2373 // trying to register to a non-native method, see if a JVM TI agent has added prefix(es) | |
| 2374 method = find_prefixed_native(k, name, signature, THREAD); | |
| 2375 if (method == NULL) { | |
| 2376 ResourceMark rm; | |
| 2377 stringStream st; | |
| 2378 st.print("Method %s is not declared as native", | |
| 2379 methodOopDesc::name_and_sig_as_C_string(Klass::cast(k()), name(), signature())); | |
| 2380 THROW_MSG_(vmSymbols::java_lang_NoSuchMethodError(), st.as_string(), false); | |
| 2381 } | |
| 2382 } | |
| 2383 | |
| 2384 if (entry != NULL) { | |
| 2385 method->set_native_function(entry, | |
| 2386 methodOopDesc::native_bind_event_is_interesting); | |
| 2387 } else { | |
| 2388 method->clear_native_function(); | |
| 2389 } | |
| 2390 if (PrintJNIResolving) { | |
| 2391 ResourceMark rm(THREAD); | |
| 2392 tty->print_cr("[Registering JNI native method %s.%s]", | |
| 2393 Klass::cast(method->method_holder())->external_name(), | |
| 2394 method->name()->as_C_string()); | |
| 2395 } | |
| 2396 return true; | |
| 2397 } | |
| 2398 | |
| 2399 DT_RETURN_MARK_DECL(RegisterNatives, jint); | |
| 2400 | |
| 2401 JNI_ENTRY(jint, jni_RegisterNatives(JNIEnv *env, jclass clazz, | |
| 2402 const JNINativeMethod *methods, | |
| 2403 jint nMethods)) | |
| 2404 JNIWrapper("RegisterNatives"); | |
| 2405 DTRACE_PROBE4(hotspot_jni, RegisterNatives__entry, env, clazz, methods, nMethods); | |
| 2406 jint ret = 0; | |
| 2407 DT_RETURN_MARK(RegisterNatives, jint, (const jint&)ret); | |
| 2408 | |
| 2409 KlassHandle h_k(thread, java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(clazz))); | |
| 2410 | |
| 2411 for (int index = 0; index < nMethods; index++) { | |
| 2412 const char* meth_name = methods[index].name; | |
| 2413 const char* meth_sig = methods[index].signature; | |
| 2414 int meth_name_len = (int)strlen(meth_name); | |
| 2415 | |
| 2416 // The class should have been loaded (we have an instance of the class | |
| 2417 // passed in) so the method and signature should already be in the symbol | |
| 2418 // table. If they're not there, the method doesn't exist. | |
| 2419 symbolHandle name(THREAD, SymbolTable::probe(meth_name, meth_name_len)); | |
| 2420 symbolHandle signature(THREAD, SymbolTable::probe(meth_sig, (int)strlen(meth_sig))); | |
| 2421 | |
| 2422 if (name.is_null() || signature.is_null()) { | |
| 2423 ResourceMark rm; | |
| 2424 stringStream st; | |
| 2425 st.print("Method %s.%s%s not found", Klass::cast(h_k())->external_name(), meth_name, meth_sig); | |
| 2426 // Must return negative value on failure | |
| 2427 THROW_MSG_(vmSymbols::java_lang_NoSuchMethodError(), st.as_string(), -1); | |
| 2428 } | |
| 2429 | |
| 2430 bool res = register_native(h_k, name, signature, | |
| 2431 (address) methods[index].fnPtr, THREAD); | |
| 2432 if (!res) { | |
| 2433 ret = -1; | |
| 2434 break; | |
| 2435 } | |
| 2436 } | |
| 2437 return ret; | |
| 2438 JNI_END | |
| 2439 | |
| 2440 | |
| 2441 JNI_ENTRY(jint, jni_UnregisterNatives(JNIEnv *env, jclass clazz)) | |
| 2442 JNIWrapper("UnregisterNatives"); | |
| 2443 DTRACE_PROBE2(hotspot_jni, UnregisterNatives__entry, env, clazz); | |
| 2444 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(clazz)); | |
| 2445 //%note jni_2 | |
| 2446 if (Klass::cast(k)->oop_is_instance()) { | |
| 2447 for (int index = 0; index < instanceKlass::cast(k)->methods()->length(); index++) { | |
| 2448 methodOop m = methodOop(instanceKlass::cast(k)->methods()->obj_at(index)); | |
| 2449 if (m->is_native()) { | |
| 2450 m->clear_native_function(); | |
| 2451 m->set_signature_handler(NULL); | |
| 2452 } | |
| 2453 } | |
| 2454 } | |
| 2455 DTRACE_PROBE1(hotspot_jni, UnregisterNatives__return, 0); | |
| 2456 return 0; | |
| 2457 JNI_END | |
| 2458 | |
| 2459 // | |
| 2460 // Monitor functions | |
| 2461 // | |
| 2462 | |
| 2463 DT_RETURN_MARK_DECL(MonitorEnter, jint); | |
| 2464 | |
| 2465 JNI_ENTRY(jint, jni_MonitorEnter(JNIEnv *env, jobject jobj)) | |
| 2466 DTRACE_PROBE2(hotspot_jni, MonitorEnter__entry, env, jobj); | |
| 2467 jint ret = JNI_ERR; | |
| 2468 DT_RETURN_MARK(MonitorEnter, jint, (const jint&)ret); | |
| 2469 | |
| 2470 // If the object is null, we can't do anything with it | |
| 2471 if (jobj == NULL) { | |
| 2472 THROW_(vmSymbols::java_lang_NullPointerException(), JNI_ERR); | |
| 2473 } | |
| 2474 | |
| 2475 Handle obj(thread, JNIHandles::resolve_non_null(jobj)); | |
| 2476 ObjectSynchronizer::jni_enter(obj, CHECK_(JNI_ERR)); | |
| 2477 ret = JNI_OK; | |
| 2478 return ret; | |
| 2479 JNI_END | |
| 2480 | |
| 2481 DT_RETURN_MARK_DECL(MonitorExit, jint); | |
| 2482 | |
| 2483 JNI_ENTRY(jint, jni_MonitorExit(JNIEnv *env, jobject jobj)) | |
| 2484 DTRACE_PROBE2(hotspot_jni, MonitorExit__entry, env, jobj); | |
| 2485 jint ret = JNI_ERR; | |
| 2486 DT_RETURN_MARK(MonitorExit, jint, (const jint&)ret); | |
| 2487 | |
| 2488 // Don't do anything with a null object | |
| 2489 if (jobj == NULL) { | |
| 2490 THROW_(vmSymbols::java_lang_NullPointerException(), JNI_ERR); | |
| 2491 } | |
| 2492 | |
| 2493 Handle obj(THREAD, JNIHandles::resolve_non_null(jobj)); | |
| 2494 ObjectSynchronizer::jni_exit(obj(), CHECK_(JNI_ERR)); | |
| 2495 | |
| 2496 ret = JNI_OK; | |
| 2497 return ret; | |
| 2498 JNI_END | |
| 2499 | |
| 2500 // | |
| 2501 // Extensions | |
| 2502 // | |
| 2503 | |
| 2504 DT_VOID_RETURN_MARK_DECL(GetStringRegion); | |
| 2505 | |
| 2506 JNI_ENTRY(void, jni_GetStringRegion(JNIEnv *env, jstring string, jsize start, jsize len, jchar *buf)) | |
| 2507 JNIWrapper("GetStringRegion"); | |
| 2508 DTRACE_PROBE5(hotspot_jni, GetStringRegion__entry, env, string, start, len, buf); | |
| 2509 DT_VOID_RETURN_MARK(GetStringRegion); | |
| 2510 oop s = JNIHandles::resolve_non_null(string); | |
| 2511 int s_len = java_lang_String::length(s); | |
| 2512 if (start < 0 || len < 0 || start + len > s_len) { | |
| 2513 THROW(vmSymbols::java_lang_StringIndexOutOfBoundsException()); | |
| 2514 } else { | |
| 2515 if (len > 0) { | |
| 2516 int s_offset = java_lang_String::offset(s); | |
| 2517 typeArrayOop s_value = java_lang_String::value(s); | |
| 2518 memcpy(buf, s_value->char_at_addr(s_offset+start), sizeof(jchar)*len); | |
| 2519 } | |
| 2520 } | |
| 2521 JNI_END | |
| 2522 | |
| 2523 DT_VOID_RETURN_MARK_DECL(GetStringUTFRegion); | |
| 2524 | |
| 2525 JNI_ENTRY(void, jni_GetStringUTFRegion(JNIEnv *env, jstring string, jsize start, jsize len, char *buf)) | |
| 2526 JNIWrapper("GetStringUTFRegion"); | |
| 2527 DTRACE_PROBE5(hotspot_jni, GetStringUTFRegion__entry, env, string, start, len, buf); | |
| 2528 DT_VOID_RETURN_MARK(GetStringUTFRegion); | |
| 2529 oop s = JNIHandles::resolve_non_null(string); | |
| 2530 int s_len = java_lang_String::length(s); | |
| 2531 if (start < 0 || len < 0 || start + len > s_len) { | |
| 2532 THROW(vmSymbols::java_lang_StringIndexOutOfBoundsException()); | |
| 2533 } else { | |
| 2534 //%note jni_7 | |
| 2535 if (len > 0) { | |
| 2536 ResourceMark rm(THREAD); | |
| 2537 char *utf_region = java_lang_String::as_utf8_string(s, start, len); | |
| 2538 int utf_len = (int)strlen(utf_region); | |
| 2539 memcpy(buf, utf_region, utf_len); | |
| 2540 buf[utf_len] = 0; | |
| 2541 } else { | |
| 2542 // JDK null-terminates the buffer even in len is zero | |
| 2543 if (buf != NULL) { | |
| 2544 buf[0] = 0; | |
| 2545 } | |
| 2546 } | |
| 2547 } | |
| 2548 JNI_END | |
| 2549 | |
| 2550 | |
| 2551 JNI_ENTRY(void*, jni_GetPrimitiveArrayCritical(JNIEnv *env, jarray array, jboolean *isCopy)) | |
| 2552 JNIWrapper("GetPrimitiveArrayCritical"); | |
| 2553 DTRACE_PROBE3(hotspot_jni, GetPrimitiveArrayCritical__entry, env, array, isCopy); | |
| 2554 GC_locker::lock_critical(thread); | |
| 2555 if (isCopy != NULL) { | |
| 2556 *isCopy = JNI_FALSE; | |
| 2557 } | |
| 2558 oop a = JNIHandles::resolve_non_null(array); | |
| 2559 assert(a->is_array(), "just checking"); | |
| 2560 BasicType type; | |
| 2561 if (a->is_objArray()) { | |
| 2562 type = T_OBJECT; | |
| 2563 } else { | |
| 2564 type = typeArrayKlass::cast(a->klass())->element_type(); | |
| 2565 } | |
| 2566 void* ret = arrayOop(a)->base(type); | |
| 2567 DTRACE_PROBE1(hotspot_jni, GetPrimitiveArrayCritical__return, ret); | |
| 2568 return ret; | |
| 2569 JNI_END | |
| 2570 | |
| 2571 | |
| 2572 JNI_ENTRY(void, jni_ReleasePrimitiveArrayCritical(JNIEnv *env, jarray array, void *carray, jint mode)) | |
| 2573 JNIWrapper("ReleasePrimitiveArrayCritical"); | |
| 2574 DTRACE_PROBE4(hotspot_jni, ReleasePrimitiveArrayCritical__entry, env, array, carray, mode); | |
| 2575 // The array, carray and mode arguments are ignored | |
| 2576 GC_locker::unlock_critical(thread); | |
| 2577 DTRACE_PROBE(hotspot_jni, ReleasePrimitiveArrayCritical__return); | |
| 2578 JNI_END | |
| 2579 | |
| 2580 | |
| 2581 JNI_ENTRY(const jchar*, jni_GetStringCritical(JNIEnv *env, jstring string, jboolean *isCopy)) | |
| 2582 JNIWrapper("GetStringCritical"); | |
| 2583 DTRACE_PROBE3(hotspot_jni, GetStringCritical__entry, env, string, isCopy); | |
| 2584 GC_locker::lock_critical(thread); | |
| 2585 if (isCopy != NULL) { | |
| 2586 *isCopy = JNI_FALSE; | |
| 2587 } | |
| 2588 oop s = JNIHandles::resolve_non_null(string); | |
| 2589 int s_len = java_lang_String::length(s); | |
| 2590 typeArrayOop s_value = java_lang_String::value(s); | |
| 2591 int s_offset = java_lang_String::offset(s); | |
| 2592 const jchar* ret; | |
| 2593 if (s_len > 0) { | |
| 2594 ret = s_value->char_at_addr(s_offset); | |
| 2595 } else { | |
| 2596 ret = (jchar*) s_value->base(T_CHAR); | |
| 2597 } | |
| 2598 DTRACE_PROBE1(hotspot_jni, GetStringCritical__return, ret); | |
| 2599 return ret; | |
| 2600 JNI_END | |
| 2601 | |
| 2602 | |
| 2603 JNI_ENTRY(void, jni_ReleaseStringCritical(JNIEnv *env, jstring str, const jchar *chars)) | |
| 2604 JNIWrapper("ReleaseStringCritical"); | |
| 2605 DTRACE_PROBE3(hotspot_jni, ReleaseStringCritical__entry, env, str, chars); | |
| 2606 // The str and chars arguments are ignored | |
| 2607 GC_locker::unlock_critical(thread); | |
| 2608 DTRACE_PROBE(hotspot_jni, ReleaseStringCritical__return); | |
| 2609 JNI_END | |
| 2610 | |
| 2611 | |
| 2612 JNI_ENTRY(jweak, jni_NewWeakGlobalRef(JNIEnv *env, jobject ref)) | |
| 2613 JNIWrapper("jni_NewWeakGlobalRef"); | |
| 2614 DTRACE_PROBE2(hotspot_jni, NewWeakGlobalRef__entry, env, ref); | |
| 2615 Handle ref_handle(thread, JNIHandles::resolve(ref)); | |
| 2616 jweak ret = JNIHandles::make_weak_global(ref_handle); | |
| 2617 DTRACE_PROBE1(hotspot_jni, NewWeakGlobalRef__return, ret); | |
| 2618 return ret; | |
| 2619 JNI_END | |
| 2620 | |
| 2621 // Must be JNI_ENTRY (with HandleMark) | |
| 2622 JNI_ENTRY(void, jni_DeleteWeakGlobalRef(JNIEnv *env, jweak ref)) | |
| 2623 JNIWrapper("jni_DeleteWeakGlobalRef"); | |
| 2624 DTRACE_PROBE2(hotspot_jni, DeleteWeakGlobalRef__entry, env, ref); | |
| 2625 JNIHandles::destroy_weak_global(ref); | |
| 2626 DTRACE_PROBE(hotspot_jni, DeleteWeakGlobalRef__return); | |
| 2627 JNI_END | |
| 2628 | |
| 2629 | |
| 2630 JNI_QUICK_ENTRY(jboolean, jni_ExceptionCheck(JNIEnv *env)) | |
| 2631 JNIWrapper("jni_ExceptionCheck"); | |
| 2632 DTRACE_PROBE1(hotspot_jni, ExceptionCheck__entry, env); | |
| 2633 jni_check_async_exceptions(thread); | |
| 2634 jboolean ret = (thread->has_pending_exception()) ? JNI_TRUE : JNI_FALSE; | |
| 2635 DTRACE_PROBE1(hotspot_jni, ExceptionCheck__return, ret); | |
| 2636 return ret; | |
| 2637 JNI_END | |
| 2638 | |
| 2639 | |
| 2640 // Initialization state for three routines below relating to | |
| 2641 // java.nio.DirectBuffers | |
| 2642 static jint directBufferSupportInitializeStarted = 0; | |
| 2643 static volatile jint directBufferSupportInitializeEnded = 0; | |
| 2644 static volatile jint directBufferSupportInitializeFailed = 0; | |
| 2645 static jclass bufferClass = NULL; | |
| 2646 static jclass directBufferClass = NULL; | |
| 2647 static jclass directByteBufferClass = NULL; | |
| 2648 static jmethodID directByteBufferConstructor = NULL; | |
| 2649 static jfieldID directBufferAddressField = NULL; | |
| 2650 static jfieldID bufferCapacityField = NULL; | |
| 2651 | |
| 2652 static jclass lookupOne(JNIEnv* env, const char* name, TRAPS) { | |
| 2653 Handle loader; // null (bootstrap) loader | |
| 2654 Handle protection_domain; // null protection domain | |
| 2655 | |
| 2656 symbolHandle sym = oopFactory::new_symbol_handle(name, CHECK_NULL); | |
|
657
715dceaa89b7
6603316: Improve instrumentation for classes loaded at startup
acorn
parents:
579
diff
changeset
|
2657 jclass result = find_class_from_class_loader(env, sym, true, loader, protection_domain, true, CHECK_NULL); |
|
715dceaa89b7
6603316: Improve instrumentation for classes loaded at startup
acorn
parents:
579
diff
changeset
|
2658 |
|
715dceaa89b7
6603316: Improve instrumentation for classes loaded at startup
acorn
parents:
579
diff
changeset
|
2659 if (TraceClassResolution && result != NULL) { |
|
715dceaa89b7
6603316: Improve instrumentation for classes loaded at startup
acorn
parents:
579
diff
changeset
|
2660 trace_class_resolution(java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(result))); |
|
715dceaa89b7
6603316: Improve instrumentation for classes loaded at startup
acorn
parents:
579
diff
changeset
|
2661 } |
|
715dceaa89b7
6603316: Improve instrumentation for classes loaded at startup
acorn
parents:
579
diff
changeset
|
2662 return result; |
| 0 | 2663 } |
| 2664 | |
| 2665 // These lookups are done with the NULL (bootstrap) ClassLoader to | |
| 2666 // circumvent any security checks that would be done by jni_FindClass. | |
| 2667 JNI_ENTRY(bool, lookupDirectBufferClasses(JNIEnv* env)) | |
| 2668 { | |
| 2669 if ((bufferClass = lookupOne(env, "java/nio/Buffer", thread)) == NULL) { return false; } | |
| 2670 if ((directBufferClass = lookupOne(env, "sun/nio/ch/DirectBuffer", thread)) == NULL) { return false; } | |
| 2671 if ((directByteBufferClass = lookupOne(env, "java/nio/DirectByteBuffer", thread)) == NULL) { return false; } | |
| 2672 return true; | |
| 2673 } | |
| 2674 JNI_END | |
| 2675 | |
| 2676 | |
| 2677 static bool initializeDirectBufferSupport(JNIEnv* env, JavaThread* thread) { | |
| 2678 if (directBufferSupportInitializeFailed) { | |
| 2679 return false; | |
| 2680 } | |
| 2681 | |
| 2682 if (Atomic::cmpxchg(1, &directBufferSupportInitializeStarted, 0) == 0) { | |
| 2683 if (!lookupDirectBufferClasses(env)) { | |
| 2684 directBufferSupportInitializeFailed = 1; | |
| 2685 return false; | |
| 2686 } | |
| 2687 | |
| 2688 // Make global references for these | |
| 2689 bufferClass = (jclass) env->NewGlobalRef(bufferClass); | |
| 2690 directBufferClass = (jclass) env->NewGlobalRef(directBufferClass); | |
| 2691 directByteBufferClass = (jclass) env->NewGlobalRef(directByteBufferClass); | |
| 2692 | |
| 2693 // Get needed field and method IDs | |
| 2694 directByteBufferConstructor = env->GetMethodID(directByteBufferClass, "<init>", "(JI)V"); | |
| 2695 directBufferAddressField = env->GetFieldID(bufferClass, "address", "J"); | |
| 2696 bufferCapacityField = env->GetFieldID(bufferClass, "capacity", "I"); | |
| 2697 | |
| 2698 if ((directByteBufferConstructor == NULL) || | |
| 2699 (directBufferAddressField == NULL) || | |
| 2700 (bufferCapacityField == NULL)) { | |
| 2701 directBufferSupportInitializeFailed = 1; | |
| 2702 return false; | |
| 2703 } | |
| 2704 | |
| 2705 directBufferSupportInitializeEnded = 1; | |
| 2706 } else { | |
| 2707 while (!directBufferSupportInitializeEnded && !directBufferSupportInitializeFailed) { | |
|
521
4db4e58c16bd
6791815: Fix for 6471657 can cause deadlock on non-Solaris platforms when initializing direct buffer support
xlu
parents:
477
diff
changeset
|
2708 // Set state as yield_all can call os:sleep. On Solaris, yield_all calls |
|
4db4e58c16bd
6791815: Fix for 6471657 can cause deadlock on non-Solaris platforms when initializing direct buffer support
xlu
parents:
477
diff
changeset
|
2709 // os::sleep which requires the VM state transition. On other platforms, it |
|
4db4e58c16bd
6791815: Fix for 6471657 can cause deadlock on non-Solaris platforms when initializing direct buffer support
xlu
parents:
477
diff
changeset
|
2710 // is not necessary. The following call to change the VM state is purposely |
|
4db4e58c16bd
6791815: Fix for 6471657 can cause deadlock on non-Solaris platforms when initializing direct buffer support
xlu
parents:
477
diff
changeset
|
2711 // put inside the loop to avoid potential deadlock when multiple threads |
|
4db4e58c16bd
6791815: Fix for 6471657 can cause deadlock on non-Solaris platforms when initializing direct buffer support
xlu
parents:
477
diff
changeset
|
2712 // try to call this method. See 6791815 for more details. |
|
4db4e58c16bd
6791815: Fix for 6471657 can cause deadlock on non-Solaris platforms when initializing direct buffer support
xlu
parents:
477
diff
changeset
|
2713 ThreadInVMfromNative tivn(thread); |
| 0 | 2714 os::yield_all(); |
| 2715 } | |
| 2716 } | |
| 2717 | |
| 2718 return !directBufferSupportInitializeFailed; | |
| 2719 } | |
| 2720 | |
| 2721 extern "C" jobject JNICALL jni_NewDirectByteBuffer(JNIEnv *env, void* address, jlong capacity) | |
| 2722 { | |
| 2723 // thread_from_jni_environment() will block if VM is gone. | |
| 2724 JavaThread* thread = JavaThread::thread_from_jni_environment(env); | |
| 2725 | |
| 2726 JNIWrapper("jni_NewDirectByteBuffer"); | |
| 2727 DTRACE_PROBE3(hotspot_jni, NewDirectByteBuffer__entry, env, address, capacity); | |
| 2728 | |
| 2729 if (!directBufferSupportInitializeEnded) { | |
| 2730 if (!initializeDirectBufferSupport(env, thread)) { | |
| 2731 DTRACE_PROBE1(hotspot_jni, NewDirectByteBuffer__return, NULL); | |
| 2732 return NULL; | |
| 2733 } | |
| 2734 } | |
| 2735 | |
| 2736 // Being paranoid about accidental sign extension on address | |
| 2737 jlong addr = (jlong) ((uintptr_t) address); | |
| 2738 // NOTE that package-private DirectByteBuffer constructor currently | |
| 2739 // takes int capacity | |
| 2740 jint cap = (jint) capacity; | |
| 2741 jobject ret = env->NewObject(directByteBufferClass, directByteBufferConstructor, addr, cap); | |
| 2742 DTRACE_PROBE1(hotspot_jni, NewDirectByteBuffer__return, ret); | |
| 2743 return ret; | |
| 2744 } | |
| 2745 | |
| 2746 DT_RETURN_MARK_DECL(GetDirectBufferAddress, void*); | |
| 2747 | |
| 2748 extern "C" void* JNICALL jni_GetDirectBufferAddress(JNIEnv *env, jobject buf) | |
| 2749 { | |
| 2750 // thread_from_jni_environment() will block if VM is gone. | |
| 2751 JavaThread* thread = JavaThread::thread_from_jni_environment(env); | |
| 2752 | |
| 2753 JNIWrapper("jni_GetDirectBufferAddress"); | |
| 2754 DTRACE_PROBE2(hotspot_jni, GetDirectBufferAddress__entry, env, buf); | |
| 2755 void* ret = NULL; | |
| 2756 DT_RETURN_MARK(GetDirectBufferAddress, void*, (const void*&)ret); | |
| 2757 | |
| 2758 if (!directBufferSupportInitializeEnded) { | |
| 2759 if (!initializeDirectBufferSupport(env, thread)) { | |
| 2760 return 0; | |
| 2761 } | |
| 2762 } | |
| 2763 | |
| 2764 if ((buf != NULL) && (!env->IsInstanceOf(buf, directBufferClass))) { | |
| 2765 return 0; | |
| 2766 } | |
| 2767 | |
| 2768 ret = (void*)(intptr_t)env->GetLongField(buf, directBufferAddressField); | |
| 2769 return ret; | |
| 2770 } | |
| 2771 | |
| 2772 DT_RETURN_MARK_DECL(GetDirectBufferCapacity, jlong); | |
| 2773 | |
| 2774 extern "C" jlong JNICALL jni_GetDirectBufferCapacity(JNIEnv *env, jobject buf) | |
| 2775 { | |
| 2776 // thread_from_jni_environment() will block if VM is gone. | |
| 2777 JavaThread* thread = JavaThread::thread_from_jni_environment(env); | |
| 2778 | |
| 2779 JNIWrapper("jni_GetDirectBufferCapacity"); | |
| 2780 DTRACE_PROBE2(hotspot_jni, GetDirectBufferCapacity__entry, env, buf); | |
| 2781 jlong ret = -1; | |
| 2782 DT_RETURN_MARK(GetDirectBufferCapacity, jlong, (const jlong&)ret); | |
| 2783 | |
| 2784 if (!directBufferSupportInitializeEnded) { | |
| 2785 if (!initializeDirectBufferSupport(env, thread)) { | |
| 2786 ret = 0; | |
| 2787 return ret; | |
| 2788 } | |
| 2789 } | |
| 2790 | |
| 2791 if (buf == NULL) { | |
| 2792 return -1; | |
| 2793 } | |
| 2794 | |
| 2795 if (!env->IsInstanceOf(buf, directBufferClass)) { | |
| 2796 return -1; | |
| 2797 } | |
| 2798 | |
| 2799 // NOTE that capacity is currently an int in the implementation | |
| 2800 ret = env->GetIntField(buf, bufferCapacityField); | |
| 2801 return ret; | |
| 2802 } | |
| 2803 | |
| 2804 | |
| 2805 JNI_LEAF(jint, jni_GetVersion(JNIEnv *env)) | |
| 2806 JNIWrapper("GetVersion"); | |
| 2807 DTRACE_PROBE1(hotspot_jni, GetVersion__entry, env); | |
| 2808 DTRACE_PROBE1(hotspot_jni, GetVersion__return, CurrentVersion); | |
| 2809 return CurrentVersion; | |
| 2810 JNI_END | |
| 2811 | |
| 2812 extern struct JavaVM_ main_vm; | |
| 2813 | |
| 2814 JNI_LEAF(jint, jni_GetJavaVM(JNIEnv *env, JavaVM **vm)) | |
| 2815 JNIWrapper("jni_GetJavaVM"); | |
| 2816 DTRACE_PROBE2(hotspot_jni, GetJavaVM__entry, env, vm); | |
| 2817 *vm = (JavaVM *)(&main_vm); | |
| 2818 DTRACE_PROBE1(hotspot_jni, GetJavaVM__return, JNI_OK); | |
| 2819 return JNI_OK; | |
| 2820 JNI_END | |
| 2821 | |
| 2822 // Structure containing all jni functions | |
| 2823 struct JNINativeInterface_ jni_NativeInterface = { | |
| 2824 NULL, | |
| 2825 NULL, | |
| 2826 NULL, | |
| 2827 | |
| 2828 NULL, | |
| 2829 | |
| 2830 jni_GetVersion, | |
| 2831 | |
| 2832 jni_DefineClass, | |
| 2833 jni_FindClass, | |
| 2834 | |
| 2835 jni_FromReflectedMethod, | |
| 2836 jni_FromReflectedField, | |
| 2837 | |
| 2838 jni_ToReflectedMethod, | |
| 2839 | |
| 2840 jni_GetSuperclass, | |
| 2841 jni_IsAssignableFrom, | |
| 2842 | |
| 2843 jni_ToReflectedField, | |
| 2844 | |
| 2845 jni_Throw, | |
| 2846 jni_ThrowNew, | |
| 2847 jni_ExceptionOccurred, | |
| 2848 jni_ExceptionDescribe, | |
| 2849 jni_ExceptionClear, | |
| 2850 jni_FatalError, | |
| 2851 | |
| 2852 jni_PushLocalFrame, | |
| 2853 jni_PopLocalFrame, | |
| 2854 | |
| 2855 jni_NewGlobalRef, | |
| 2856 jni_DeleteGlobalRef, | |
| 2857 jni_DeleteLocalRef, | |
| 2858 jni_IsSameObject, | |
| 2859 | |
| 2860 jni_NewLocalRef, | |
| 2861 jni_EnsureLocalCapacity, | |
| 2862 | |
| 2863 jni_AllocObject, | |
| 2864 jni_NewObject, | |
| 2865 jni_NewObjectV, | |
| 2866 jni_NewObjectA, | |
| 2867 | |
| 2868 jni_GetObjectClass, | |
| 2869 jni_IsInstanceOf, | |
| 2870 | |
| 2871 jni_GetMethodID, | |
| 2872 | |
| 2873 jni_CallObjectMethod, | |
| 2874 jni_CallObjectMethodV, | |
| 2875 jni_CallObjectMethodA, | |
| 2876 jni_CallBooleanMethod, | |
| 2877 jni_CallBooleanMethodV, | |
| 2878 jni_CallBooleanMethodA, | |
| 2879 jni_CallByteMethod, | |
| 2880 jni_CallByteMethodV, | |
| 2881 jni_CallByteMethodA, | |
| 2882 jni_CallCharMethod, | |
| 2883 jni_CallCharMethodV, | |
| 2884 jni_CallCharMethodA, | |
| 2885 jni_CallShortMethod, | |
| 2886 jni_CallShortMethodV, | |
| 2887 jni_CallShortMethodA, | |
| 2888 jni_CallIntMethod, | |
| 2889 jni_CallIntMethodV, | |
| 2890 jni_CallIntMethodA, | |
| 2891 jni_CallLongMethod, | |
| 2892 jni_CallLongMethodV, | |
| 2893 jni_CallLongMethodA, | |
| 2894 jni_CallFloatMethod, | |
| 2895 jni_CallFloatMethodV, | |
| 2896 jni_CallFloatMethodA, | |
| 2897 jni_CallDoubleMethod, | |
| 2898 jni_CallDoubleMethodV, | |
| 2899 jni_CallDoubleMethodA, | |
| 2900 jni_CallVoidMethod, | |
| 2901 jni_CallVoidMethodV, | |
| 2902 jni_CallVoidMethodA, | |
| 2903 | |
| 2904 jni_CallNonvirtualObjectMethod, | |
| 2905 jni_CallNonvirtualObjectMethodV, | |
| 2906 jni_CallNonvirtualObjectMethodA, | |
| 2907 jni_CallNonvirtualBooleanMethod, | |
| 2908 jni_CallNonvirtualBooleanMethodV, | |
| 2909 jni_CallNonvirtualBooleanMethodA, | |
| 2910 jni_CallNonvirtualByteMethod, | |
| 2911 jni_CallNonvirtualByteMethodV, | |
| 2912 jni_CallNonvirtualByteMethodA, | |
| 2913 jni_CallNonvirtualCharMethod, | |
| 2914 jni_CallNonvirtualCharMethodV, | |
| 2915 jni_CallNonvirtualCharMethodA, | |
| 2916 jni_CallNonvirtualShortMethod, | |
| 2917 jni_CallNonvirtualShortMethodV, | |
| 2918 jni_CallNonvirtualShortMethodA, | |
| 2919 jni_CallNonvirtualIntMethod, | |
| 2920 jni_CallNonvirtualIntMethodV, | |
| 2921 jni_CallNonvirtualIntMethodA, | |
| 2922 jni_CallNonvirtualLongMethod, | |
| 2923 jni_CallNonvirtualLongMethodV, | |
| 2924 jni_CallNonvirtualLongMethodA, | |
| 2925 jni_CallNonvirtualFloatMethod, | |
| 2926 jni_CallNonvirtualFloatMethodV, | |
| 2927 jni_CallNonvirtualFloatMethodA, | |
| 2928 jni_CallNonvirtualDoubleMethod, | |
| 2929 jni_CallNonvirtualDoubleMethodV, | |
| 2930 jni_CallNonvirtualDoubleMethodA, | |
| 2931 jni_CallNonvirtualVoidMethod, | |
| 2932 jni_CallNonvirtualVoidMethodV, | |
| 2933 jni_CallNonvirtualVoidMethodA, | |
| 2934 | |
| 2935 jni_GetFieldID, | |
| 2936 | |
| 2937 jni_GetObjectField, | |
| 2938 jni_GetBooleanField, | |
| 2939 jni_GetByteField, | |
| 2940 jni_GetCharField, | |
| 2941 jni_GetShortField, | |
| 2942 jni_GetIntField, | |
| 2943 jni_GetLongField, | |
| 2944 jni_GetFloatField, | |
| 2945 jni_GetDoubleField, | |
| 2946 | |
| 2947 jni_SetObjectField, | |
| 2948 jni_SetBooleanField, | |
| 2949 jni_SetByteField, | |
| 2950 jni_SetCharField, | |
| 2951 jni_SetShortField, | |
| 2952 jni_SetIntField, | |
| 2953 jni_SetLongField, | |
| 2954 jni_SetFloatField, | |
| 2955 jni_SetDoubleField, | |
| 2956 | |
| 2957 jni_GetStaticMethodID, | |
| 2958 | |
| 2959 jni_CallStaticObjectMethod, | |
| 2960 jni_CallStaticObjectMethodV, | |
| 2961 jni_CallStaticObjectMethodA, | |
| 2962 jni_CallStaticBooleanMethod, | |
| 2963 jni_CallStaticBooleanMethodV, | |
| 2964 jni_CallStaticBooleanMethodA, | |
| 2965 jni_CallStaticByteMethod, | |
| 2966 jni_CallStaticByteMethodV, | |
| 2967 jni_CallStaticByteMethodA, | |
| 2968 jni_CallStaticCharMethod, | |
| 2969 jni_CallStaticCharMethodV, | |
| 2970 jni_CallStaticCharMethodA, | |
| 2971 jni_CallStaticShortMethod, | |
| 2972 jni_CallStaticShortMethodV, | |
| 2973 jni_CallStaticShortMethodA, | |
| 2974 jni_CallStaticIntMethod, | |
| 2975 jni_CallStaticIntMethodV, | |
| 2976 jni_CallStaticIntMethodA, | |
| 2977 jni_CallStaticLongMethod, | |
| 2978 jni_CallStaticLongMethodV, | |
| 2979 jni_CallStaticLongMethodA, | |
| 2980 jni_CallStaticFloatMethod, | |
| 2981 jni_CallStaticFloatMethodV, | |
| 2982 jni_CallStaticFloatMethodA, | |
| 2983 jni_CallStaticDoubleMethod, | |
| 2984 jni_CallStaticDoubleMethodV, | |
| 2985 jni_CallStaticDoubleMethodA, | |
| 2986 jni_CallStaticVoidMethod, | |
| 2987 jni_CallStaticVoidMethodV, | |
| 2988 jni_CallStaticVoidMethodA, | |
| 2989 | |
| 2990 jni_GetStaticFieldID, | |
| 2991 | |
| 2992 jni_GetStaticObjectField, | |
| 2993 jni_GetStaticBooleanField, | |
| 2994 jni_GetStaticByteField, | |
| 2995 jni_GetStaticCharField, | |
| 2996 jni_GetStaticShortField, | |
| 2997 jni_GetStaticIntField, | |
| 2998 jni_GetStaticLongField, | |
| 2999 jni_GetStaticFloatField, | |
| 3000 jni_GetStaticDoubleField, | |
| 3001 | |
| 3002 jni_SetStaticObjectField, | |
| 3003 jni_SetStaticBooleanField, | |
| 3004 jni_SetStaticByteField, | |
| 3005 jni_SetStaticCharField, | |
| 3006 jni_SetStaticShortField, | |
| 3007 jni_SetStaticIntField, | |
| 3008 jni_SetStaticLongField, | |
| 3009 jni_SetStaticFloatField, | |
| 3010 jni_SetStaticDoubleField, | |
| 3011 | |
| 3012 jni_NewString, | |
| 3013 jni_GetStringLength, | |
| 3014 jni_GetStringChars, | |
| 3015 jni_ReleaseStringChars, | |
| 3016 | |
| 3017 jni_NewStringUTF, | |
| 3018 jni_GetStringUTFLength, | |
| 3019 jni_GetStringUTFChars, | |
| 3020 jni_ReleaseStringUTFChars, | |
| 3021 | |
| 3022 jni_GetArrayLength, | |
| 3023 | |
| 3024 jni_NewObjectArray, | |
| 3025 jni_GetObjectArrayElement, | |
| 3026 jni_SetObjectArrayElement, | |
| 3027 | |
| 3028 jni_NewBooleanArray, | |
| 3029 jni_NewByteArray, | |
| 3030 jni_NewCharArray, | |
| 3031 jni_NewShortArray, | |
| 3032 jni_NewIntArray, | |
| 3033 jni_NewLongArray, | |
| 3034 jni_NewFloatArray, | |
| 3035 jni_NewDoubleArray, | |
| 3036 | |
| 3037 jni_GetBooleanArrayElements, | |
| 3038 jni_GetByteArrayElements, | |
| 3039 jni_GetCharArrayElements, | |
| 3040 jni_GetShortArrayElements, | |
| 3041 jni_GetIntArrayElements, | |
| 3042 jni_GetLongArrayElements, | |
| 3043 jni_GetFloatArrayElements, | |
| 3044 jni_GetDoubleArrayElements, | |
| 3045 | |
| 3046 jni_ReleaseBooleanArrayElements, | |
| 3047 jni_ReleaseByteArrayElements, | |
| 3048 jni_ReleaseCharArrayElements, | |
| 3049 jni_ReleaseShortArrayElements, | |
| 3050 jni_ReleaseIntArrayElements, | |
| 3051 jni_ReleaseLongArrayElements, | |
| 3052 jni_ReleaseFloatArrayElements, | |
| 3053 jni_ReleaseDoubleArrayElements, | |
| 3054 | |
| 3055 jni_GetBooleanArrayRegion, | |
| 3056 jni_GetByteArrayRegion, | |
| 3057 jni_GetCharArrayRegion, | |
| 3058 jni_GetShortArrayRegion, | |
| 3059 jni_GetIntArrayRegion, | |
| 3060 jni_GetLongArrayRegion, | |
| 3061 jni_GetFloatArrayRegion, | |
| 3062 jni_GetDoubleArrayRegion, | |
| 3063 | |
| 3064 jni_SetBooleanArrayRegion, | |
| 3065 jni_SetByteArrayRegion, | |
| 3066 jni_SetCharArrayRegion, | |
| 3067 jni_SetShortArrayRegion, | |
| 3068 jni_SetIntArrayRegion, | |
| 3069 jni_SetLongArrayRegion, | |
| 3070 jni_SetFloatArrayRegion, | |
| 3071 jni_SetDoubleArrayRegion, | |
| 3072 | |
| 3073 jni_RegisterNatives, | |
| 3074 jni_UnregisterNatives, | |
| 3075 | |
| 3076 jni_MonitorEnter, | |
| 3077 jni_MonitorExit, | |
| 3078 | |
| 3079 jni_GetJavaVM, | |
| 3080 | |
| 3081 jni_GetStringRegion, | |
| 3082 jni_GetStringUTFRegion, | |
| 3083 | |
| 3084 jni_GetPrimitiveArrayCritical, | |
| 3085 jni_ReleasePrimitiveArrayCritical, | |
| 3086 | |
| 3087 jni_GetStringCritical, | |
| 3088 jni_ReleaseStringCritical, | |
| 3089 | |
| 3090 jni_NewWeakGlobalRef, | |
| 3091 jni_DeleteWeakGlobalRef, | |
| 3092 | |
| 3093 jni_ExceptionCheck, | |
| 3094 | |
| 3095 jni_NewDirectByteBuffer, | |
| 3096 jni_GetDirectBufferAddress, | |
| 3097 jni_GetDirectBufferCapacity, | |
| 3098 | |
| 3099 // New 1_6 features | |
| 3100 | |
| 3101 jni_GetObjectRefType | |
| 3102 }; | |
| 3103 | |
| 3104 | |
| 3105 // For jvmti use to modify jni function table. | |
| 3106 // Java threads in native contiues to run until it is transitioned | |
| 3107 // to VM at safepoint. Before the transition or before it is blocked | |
| 3108 // for safepoint it may access jni function table. VM could crash if | |
| 3109 // any java thread access the jni function table in the middle of memcpy. | |
| 3110 // To avoid this each function pointers are copied automically. | |
| 3111 void copy_jni_function_table(const struct JNINativeInterface_ *new_jni_NativeInterface) { | |
| 3112 assert(SafepointSynchronize::is_at_safepoint(), "must be at safepoint"); | |
| 3113 intptr_t *a = (intptr_t *) jni_functions(); | |
| 3114 intptr_t *b = (intptr_t *) new_jni_NativeInterface; | |
| 3115 for (uint i=0; i < sizeof(struct JNINativeInterface_)/sizeof(void *); i++) { | |
| 3116 Atomic::store_ptr(*b++, a++); | |
| 3117 } | |
| 3118 } | |
| 3119 | |
| 3120 void quicken_jni_functions() { | |
| 3121 // Replace Get<Primitive>Field with fast versions | |
| 3122 if (UseFastJNIAccessors && !JvmtiExport::can_post_field_access() | |
| 3123 && !VerifyJNIFields && !TraceJNICalls && !CountJNICalls && !CheckJNICalls | |
| 3124 #if defined(_WINDOWS) && defined(IA32) && defined(COMPILER2) | |
| 3125 // windows x86 currently needs SEH wrapper and the gain of the fast | |
| 3126 // versions currently isn't certain for server vm on uniprocessor. | |
| 3127 && os::is_MP() | |
| 3128 #endif | |
| 3129 ) { | |
| 3130 address func; | |
| 3131 func = JNI_FastGetField::generate_fast_get_boolean_field(); | |
| 3132 if (func != (address)-1) { | |
| 3133 jni_NativeInterface.GetBooleanField = (GetBooleanField_t)func; | |
| 3134 } | |
| 3135 func = JNI_FastGetField::generate_fast_get_byte_field(); | |
| 3136 if (func != (address)-1) { | |
| 3137 jni_NativeInterface.GetByteField = (GetByteField_t)func; | |
| 3138 } | |
| 3139 func = JNI_FastGetField::generate_fast_get_char_field(); | |
| 3140 if (func != (address)-1) { | |
| 3141 jni_NativeInterface.GetCharField = (GetCharField_t)func; | |
| 3142 } | |
| 3143 func = JNI_FastGetField::generate_fast_get_short_field(); | |
| 3144 if (func != (address)-1) { | |
| 3145 jni_NativeInterface.GetShortField = (GetShortField_t)func; | |
| 3146 } | |
| 3147 func = JNI_FastGetField::generate_fast_get_int_field(); | |
| 3148 if (func != (address)-1) { | |
| 3149 jni_NativeInterface.GetIntField = (GetIntField_t)func; | |
| 3150 } | |
| 3151 func = JNI_FastGetField::generate_fast_get_long_field(); | |
| 3152 if (func != (address)-1) { | |
| 3153 jni_NativeInterface.GetLongField = (GetLongField_t)func; | |
| 3154 } | |
| 3155 func = JNI_FastGetField::generate_fast_get_float_field(); | |
| 3156 if (func != (address)-1) { | |
| 3157 jni_NativeInterface.GetFloatField = (GetFloatField_t)func; | |
| 3158 } | |
| 3159 func = JNI_FastGetField::generate_fast_get_double_field(); | |
| 3160 if (func != (address)-1) { | |
| 3161 jni_NativeInterface.GetDoubleField = (GetDoubleField_t)func; | |
| 3162 } | |
| 3163 } | |
| 3164 } | |
| 3165 | |
| 3166 // Returns the function structure | |
| 3167 struct JNINativeInterface_* jni_functions() { | |
| 3168 #ifndef JNICHECK_KERNEL | |
| 3169 if (CheckJNICalls) return jni_functions_check(); | |
| 3170 #else // JNICHECK_KERNEL | |
| 3171 if (CheckJNICalls) warning("-Xcheck:jni is not supported in kernel vm."); | |
| 3172 #endif // JNICHECK_KERNEL | |
| 3173 return &jni_NativeInterface; | |
| 3174 } | |
| 3175 | |
| 3176 // Returns the function structure | |
| 3177 struct JNINativeInterface_* jni_functions_nocheck() { | |
| 3178 return &jni_NativeInterface; | |
| 3179 } | |
| 3180 | |
| 3181 | |
| 3182 // Invocation API | |
| 3183 | |
| 3184 | |
| 3185 // Forward declaration | |
| 3186 extern const struct JNIInvokeInterface_ jni_InvokeInterface; | |
| 3187 | |
| 3188 // Global invocation API vars | |
| 3189 volatile jint vm_created = 0; | |
| 3190 // Indicate whether it is safe to recreate VM | |
| 3191 volatile jint safe_to_recreate_vm = 1; | |
| 3192 struct JavaVM_ main_vm = {&jni_InvokeInterface}; | |
| 3193 | |
| 3194 | |
| 3195 #define JAVASTACKSIZE (400 * 1024) /* Default size of a thread java stack */ | |
| 3196 #define PROCSTACKSIZE 0 /* 0 means default size in HPI */ | |
| 3197 enum { VERIFY_NONE, VERIFY_REMOTE, VERIFY_ALL }; | |
| 3198 | |
| 3199 HS_DTRACE_PROBE_DECL1(hotspot_jni, GetDefaultJavaVMInitArgs__entry, void*); | |
| 3200 DT_RETURN_MARK_DECL(GetDefaultJavaVMInitArgs, jint); | |
| 3201 | |
| 3202 _JNI_IMPORT_OR_EXPORT_ jint JNICALL JNI_GetDefaultJavaVMInitArgs(void *args_) { | |
| 3203 HS_DTRACE_PROBE1(hotspot_jni, GetDefaultJavaVMInitArgs__entry, args_); | |
| 3204 JDK1_1InitArgs *args = (JDK1_1InitArgs *)args_; | |
| 3205 jint ret = JNI_ERR; | |
| 3206 DT_RETURN_MARK(GetDefaultJavaVMInitArgs, jint, (const jint&)ret); | |
| 3207 | |
| 3208 if (Threads::is_supported_jni_version(args->version)) { | |
| 3209 ret = JNI_OK; | |
| 3210 } | |
| 3211 // 1.1 style no longer supported in hotspot. | |
| 3212 // According the JNI spec, we should update args->version on return. | |
| 3213 // We also use the structure to communicate with launcher about default | |
| 3214 // stack size. | |
| 3215 if (args->version == JNI_VERSION_1_1) { | |
| 3216 args->version = JNI_VERSION_1_2; | |
| 3217 // javaStackSize is int in arguments structure | |
| 3218 assert(jlong(ThreadStackSize) * K < INT_MAX, "integer overflow"); | |
| 3219 args->javaStackSize = (jint)(ThreadStackSize * K); | |
| 3220 } | |
| 3221 return ret; | |
| 3222 } | |
| 3223 | |
| 3224 HS_DTRACE_PROBE_DECL3(hotspot_jni, CreateJavaVM__entry, vm, penv, args); | |
| 3225 DT_RETURN_MARK_DECL(CreateJavaVM, jint); | |
| 3226 | |
| 3227 _JNI_IMPORT_OR_EXPORT_ jint JNICALL JNI_CreateJavaVM(JavaVM **vm, void **penv, void *args) { | |
| 3228 HS_DTRACE_PROBE3(hotspot_jni, CreateJavaVM__entry, vm, penv, args); | |
| 3229 | |
| 3230 jint result = JNI_ERR; | |
| 3231 DT_RETURN_MARK(CreateJavaVM, jint, (const jint&)result); | |
| 3232 | |
| 3233 // At the moment it's only possible to have one Java VM, | |
| 3234 // since some of the runtime state is in global variables. | |
| 3235 | |
| 3236 // We cannot use our mutex locks here, since they only work on | |
| 3237 // Threads. We do an atomic compare and exchange to ensure only | |
| 3238 // one thread can call this method at a time | |
| 3239 | |
| 3240 // We use Atomic::xchg rather than Atomic::add/dec since on some platforms | |
| 3241 // the add/dec implementations are dependent on whether we are running | |
| 3242 // on a multiprocessor, and at this stage of initialization the os::is_MP | |
| 3243 // function used to determine this will always return false. Atomic::xchg | |
| 3244 // does not have this problem. | |
| 3245 if (Atomic::xchg(1, &vm_created) == 1) { | |
| 3246 return JNI_ERR; // already created, or create attempt in progress | |
| 3247 } | |
| 3248 if (Atomic::xchg(0, &safe_to_recreate_vm) == 0) { | |
| 3249 return JNI_ERR; // someone tried and failed and retry not allowed. | |
| 3250 } | |
| 3251 | |
| 3252 assert(vm_created == 1, "vm_created is true during the creation"); | |
| 3253 | |
| 3254 /** | |
| 3255 * Certain errors during initialization are recoverable and do not | |
| 3256 * prevent this method from being called again at a later time | |
| 3257 * (perhaps with different arguments). However, at a certain | |
| 3258 * point during initialization if an error occurs we cannot allow | |
| 3259 * this function to be called again (or it will crash). In those | |
| 3260 * situations, the 'canTryAgain' flag is set to false, which atomically | |
| 3261 * sets safe_to_recreate_vm to 1, such that any new call to | |
| 3262 * JNI_CreateJavaVM will immediately fail using the above logic. | |
| 3263 */ | |
| 3264 bool can_try_again = true; | |
| 3265 | |
| 3266 result = Threads::create_vm((JavaVMInitArgs*) args, &can_try_again); | |
| 3267 if (result == JNI_OK) { | |
| 3268 JavaThread *thread = JavaThread::current(); | |
| 3269 /* thread is thread_in_vm here */ | |
| 3270 *vm = (JavaVM *)(&main_vm); | |
| 3271 *(JNIEnv**)penv = thread->jni_environment(); | |
| 3272 | |
| 3273 // Tracks the time application was running before GC | |
| 3274 RuntimeService::record_application_start(); | |
| 3275 | |
| 3276 // Notify JVMTI | |
| 3277 if (JvmtiExport::should_post_thread_life()) { | |
| 3278 JvmtiExport::post_thread_start(thread); | |
| 3279 } | |
| 3280 // Check if we should compile all classes on bootclasspath | |
| 3281 NOT_PRODUCT(if (CompileTheWorld) ClassLoader::compile_the_world();) | |
| 3282 // Since this is not a JVM_ENTRY we have to set the thread state manually before leaving. | |
| 3283 ThreadStateTransition::transition_and_fence(thread, _thread_in_vm, _thread_in_native); | |
| 3284 } else { | |
| 3285 if (can_try_again) { | |
| 3286 // reset safe_to_recreate_vm to 1 so that retrial would be possible | |
| 3287 safe_to_recreate_vm = 1; | |
| 3288 } | |
| 3289 | |
| 3290 // Creation failed. We must reset vm_created | |
| 3291 *vm = 0; | |
| 3292 *(JNIEnv**)penv = 0; | |
| 3293 // reset vm_created last to avoid race condition. Use OrderAccess to | |
| 3294 // control both compiler and architectural-based reordering. | |
| 3295 OrderAccess::release_store(&vm_created, 0); | |
| 3296 } | |
| 3297 | |
| 3298 return result; | |
| 3299 } | |
| 3300 | |
| 3301 HS_DTRACE_PROBE_DECL3(hotspot_jni, GetCreatedJavaVMs__entry, \ | |
| 3302 JavaVM**, jsize, jsize*); | |
| 3303 HS_DTRACE_PROBE_DECL1(hotspot_jni, GetCreatedJavaVMs__return, jint); | |
| 3304 | |
| 3305 _JNI_IMPORT_OR_EXPORT_ jint JNICALL JNI_GetCreatedJavaVMs(JavaVM **vm_buf, jsize bufLen, jsize *numVMs) { | |
| 3306 // See bug 4367188, the wrapper can sometimes cause VM crashes | |
| 3307 // JNIWrapper("GetCreatedJavaVMs"); | |
| 3308 HS_DTRACE_PROBE3(hotspot_jni, GetCreatedJavaVMs__entry, \ | |
| 3309 vm_buf, bufLen, numVMs); | |
| 3310 if (vm_created) { | |
| 3311 if (numVMs != NULL) *numVMs = 1; | |
| 3312 if (bufLen > 0) *vm_buf = (JavaVM *)(&main_vm); | |
| 3313 } else { | |
| 3314 if (numVMs != NULL) *numVMs = 0; | |
| 3315 } | |
| 3316 HS_DTRACE_PROBE1(hotspot_jni, GetCreatedJavaVMs__return, JNI_OK); | |
| 3317 return JNI_OK; | |
| 3318 } | |
| 3319 | |
| 3320 extern "C" { | |
| 3321 | |
| 3322 DT_RETURN_MARK_DECL(DestroyJavaVM, jint); | |
| 3323 | |
| 3324 jint JNICALL jni_DestroyJavaVM(JavaVM *vm) { | |
| 3325 DTRACE_PROBE1(hotspot_jni, DestroyJavaVM__entry, vm); | |
| 3326 jint res = JNI_ERR; | |
| 3327 DT_RETURN_MARK(DestroyJavaVM, jint, (const jint&)res); | |
| 3328 | |
| 3329 if (!vm_created) { | |
| 3330 res = JNI_ERR; | |
| 3331 return res; | |
| 3332 } | |
| 3333 | |
| 3334 JNIWrapper("DestroyJavaVM"); | |
| 3335 JNIEnv *env; | |
| 3336 JavaVMAttachArgs destroyargs; | |
| 3337 destroyargs.version = CurrentVersion; | |
| 3338 destroyargs.name = (char *)"DestroyJavaVM"; | |
| 3339 destroyargs.group = NULL; | |
| 3340 res = vm->AttachCurrentThread((void **)&env, (void *)&destroyargs); | |
| 3341 if (res != JNI_OK) { | |
| 3342 return res; | |
| 3343 } | |
| 3344 | |
| 3345 // Since this is not a JVM_ENTRY we have to set the thread state manually before entering. | |
| 3346 JavaThread* thread = JavaThread::current(); | |
| 3347 ThreadStateTransition::transition_from_native(thread, _thread_in_vm); | |
| 3348 if (Threads::destroy_vm()) { | |
| 3349 // Should not change thread state, VM is gone | |
| 3350 vm_created = false; | |
| 3351 res = JNI_OK; | |
| 3352 return res; | |
| 3353 } else { | |
| 3354 ThreadStateTransition::transition_and_fence(thread, _thread_in_vm, _thread_in_native); | |
| 3355 res = JNI_ERR; | |
| 3356 return res; | |
| 3357 } | |
| 3358 } | |
| 3359 | |
| 3360 | |
| 3361 static jint attach_current_thread(JavaVM *vm, void **penv, void *_args, bool daemon) { | |
| 3362 JavaVMAttachArgs *args = (JavaVMAttachArgs *) _args; | |
| 3363 | |
| 3364 // Check below commented out from JDK1.2fcs as well | |
| 3365 /* | |
| 3366 if (args && (args->version != JNI_VERSION_1_1 || args->version != JNI_VERSION_1_2)) { | |
| 3367 return JNI_EVERSION; | |
| 3368 } | |
| 3369 */ | |
| 3370 | |
| 3371 Thread* t = ThreadLocalStorage::get_thread_slow(); | |
| 3372 if (t != NULL) { | |
| 3373 // If the thread has been attached this operation is a no-op | |
| 3374 *(JNIEnv**)penv = ((JavaThread*) t)->jni_environment(); | |
| 3375 return JNI_OK; | |
| 3376 } | |
| 3377 | |
| 3378 // Create a thread and mark it as attaching so it will be skipped by the | |
| 3379 // ThreadsListEnumerator - see CR 6404306 | |
| 3380 JavaThread* thread = new JavaThread(true); | |
| 3381 | |
| 3382 // Set correct safepoint info. The thread is going to call into Java when | |
| 3383 // initializing the Java level thread object. Hence, the correct state must | |
| 3384 // be set in order for the Safepoint code to deal with it correctly. | |
| 3385 thread->set_thread_state(_thread_in_vm); | |
| 3386 // Must do this before initialize_thread_local_storage | |
| 3387 thread->record_stack_base_and_size(); | |
| 3388 thread->initialize_thread_local_storage(); | |
| 3389 | |
| 3390 if (!os::create_attached_thread(thread)) { | |
| 3391 delete thread; | |
| 3392 return JNI_ERR; | |
| 3393 } | |
| 3394 thread->initialize_tlab(); | |
| 3395 | |
| 3396 // Crucial that we do not have a safepoint check for this thread, since it has | |
| 3397 // not been added to the Thread list yet. | |
| 3398 { Threads_lock->lock_without_safepoint_check(); | |
| 3399 // This must be inside this lock in order to get FullGCALot to work properly, i.e., to | |
| 3400 // avoid this thread trying to do a GC before it is added to the thread-list | |
| 3401 thread->set_active_handles(JNIHandleBlock::allocate_block()); | |
| 3402 Threads::add(thread, daemon); | |
| 3403 Threads_lock->unlock(); | |
| 3404 } | |
| 3405 // Create thread group and name info from attach arguments | |
| 3406 oop group = NULL; | |
| 3407 char* thread_name = NULL; | |
| 3408 if (args != NULL && Threads::is_supported_jni_version(args->version)) { | |
| 3409 group = JNIHandles::resolve(args->group); | |
| 3410 thread_name = args->name; // may be NULL | |
| 3411 } | |
| 3412 if (group == NULL) group = Universe::main_thread_group(); | |
| 3413 | |
| 3414 // Create Java level thread object and attach it to this thread | |
| 3415 bool attach_failed = false; | |
| 3416 { | |
| 3417 EXCEPTION_MARK; | |
| 3418 HandleMark hm(THREAD); | |
| 3419 Handle thread_group(THREAD, group); | |
| 3420 thread->allocate_threadObj(thread_group, thread_name, daemon, THREAD); | |
| 3421 if (HAS_PENDING_EXCEPTION) { | |
| 3422 CLEAR_PENDING_EXCEPTION; | |
| 3423 // cleanup outside the handle mark. | |
| 3424 attach_failed = true; | |
| 3425 } | |
| 3426 } | |
| 3427 | |
| 3428 if (attach_failed) { | |
| 3429 // Added missing cleanup | |
| 3430 thread->cleanup_failed_attach_current_thread(); | |
| 3431 return JNI_ERR; | |
| 3432 } | |
| 3433 | |
| 3434 // mark the thread as no longer attaching | |
| 3435 // this uses a fence to push the change through so we don't have | |
| 3436 // to regrab the threads_lock | |
| 3437 thread->set_attached(); | |
| 3438 | |
| 3439 // Enable stack overflow checks | |
| 3440 thread->create_stack_guard_pages(); | |
| 3441 | |
| 3442 // Set java thread status. | |
| 3443 java_lang_Thread::set_thread_status(thread->threadObj(), | |
| 3444 java_lang_Thread::RUNNABLE); | |
| 3445 | |
| 3446 // Notify the debugger | |
| 3447 if (JvmtiExport::should_post_thread_life()) { | |
| 3448 JvmtiExport::post_thread_start(thread); | |
| 3449 } | |
| 3450 | |
| 3451 *(JNIEnv**)penv = thread->jni_environment(); | |
| 3452 | |
| 3453 // Now leaving the VM, so change thread_state. This is normally automatically taken care | |
| 3454 // of in the JVM_ENTRY. But in this situation we have to do it manually. Notice, that by | |
| 3455 // using ThreadStateTransition::transition, we do a callback to the safepoint code if | |
| 3456 // needed. | |
| 3457 | |
| 3458 ThreadStateTransition::transition_and_fence(thread, _thread_in_vm, _thread_in_native); | |
| 3459 | |
| 3460 // Perform any platform dependent FPU setup | |
| 3461 os::setup_fpu(); | |
| 3462 | |
| 3463 return JNI_OK; | |
| 3464 } | |
| 3465 | |
| 3466 | |
| 3467 jint JNICALL jni_AttachCurrentThread(JavaVM *vm, void **penv, void *_args) { | |
| 3468 DTRACE_PROBE3(hotspot_jni, AttachCurrentThread__entry, vm, penv, _args); | |
| 3469 if (!vm_created) { | |
| 3470 DTRACE_PROBE1(hotspot_jni, AttachCurrentThread__return, JNI_ERR); | |
| 3471 return JNI_ERR; | |
| 3472 } | |
| 3473 | |
| 3474 JNIWrapper("AttachCurrentThread"); | |
| 3475 jint ret = attach_current_thread(vm, penv, _args, false); | |
| 3476 DTRACE_PROBE1(hotspot_jni, AttachCurrentThread__return, ret); | |
| 3477 return ret; | |
| 3478 } | |
| 3479 | |
| 3480 | |
| 3481 jint JNICALL jni_DetachCurrentThread(JavaVM *vm) { | |
| 3482 DTRACE_PROBE1(hotspot_jni, DetachCurrentThread__entry, vm); | |
| 3483 VM_Exit::block_if_vm_exited(); | |
| 3484 | |
| 3485 JNIWrapper("DetachCurrentThread"); | |
| 3486 | |
| 3487 // If the thread has been deattacted the operations is a no-op | |
| 3488 if (ThreadLocalStorage::thread() == NULL) { | |
| 3489 DTRACE_PROBE1(hotspot_jni, DetachCurrentThread__return, JNI_OK); | |
| 3490 return JNI_OK; | |
| 3491 } | |
| 3492 | |
| 3493 JavaThread* thread = JavaThread::current(); | |
| 3494 if (thread->has_last_Java_frame()) { | |
| 3495 DTRACE_PROBE1(hotspot_jni, DetachCurrentThread__return, JNI_ERR); | |
| 3496 // Can't detach a thread that's running java, that can't work. | |
| 3497 return JNI_ERR; | |
| 3498 } | |
| 3499 | |
| 3500 // Safepoint support. Have to do call-back to safepoint code, if in the | |
| 3501 // middel of a safepoint operation | |
| 3502 ThreadStateTransition::transition_from_native(thread, _thread_in_vm); | |
| 3503 | |
| 3504 // XXX: Note that JavaThread::exit() call below removes the guards on the | |
| 3505 // stack pages set up via enable_stack_{red,yellow}_zone() calls | |
| 3506 // above in jni_AttachCurrentThread. Unfortunately, while the setting | |
| 3507 // of the guards is visible in jni_AttachCurrentThread above, | |
| 3508 // the removal of the guards is buried below in JavaThread::exit() | |
| 3509 // here. The abstraction should be more symmetrically either exposed | |
| 3510 // or hidden (e.g. it could probably be hidden in the same | |
| 3511 // (platform-dependent) methods where we do alternate stack | |
| 3512 // maintenance work?) | |
| 3513 thread->exit(false, JavaThread::jni_detach); | |
| 3514 delete thread; | |
| 3515 | |
| 3516 DTRACE_PROBE1(hotspot_jni, DetachCurrentThread__return, JNI_OK); | |
| 3517 return JNI_OK; | |
| 3518 } | |
| 3519 | |
| 3520 DT_RETURN_MARK_DECL(GetEnv, jint); | |
| 3521 | |
| 3522 jint JNICALL jni_GetEnv(JavaVM *vm, void **penv, jint version) { | |
| 3523 DTRACE_PROBE3(hotspot_jni, GetEnv__entry, vm, penv, version); | |
| 3524 jint ret = JNI_ERR; | |
| 3525 DT_RETURN_MARK(GetEnv, jint, (const jint&)ret); | |
| 3526 | |
| 3527 if (!vm_created) { | |
| 3528 *penv = NULL; | |
| 3529 ret = JNI_EDETACHED; | |
| 3530 return ret; | |
| 3531 } | |
| 3532 | |
| 3533 if (JvmtiExport::is_jvmti_version(version)) { | |
| 3534 ret = JvmtiExport::get_jvmti_interface(vm, penv, version); | |
| 3535 return ret; | |
| 3536 } | |
| 3537 | |
| 3538 #ifndef JVMPI_VERSION_1 | |
| 3539 // need these in order to be polite about older agents | |
| 3540 #define JVMPI_VERSION_1 ((jint)0x10000001) | |
| 3541 #define JVMPI_VERSION_1_1 ((jint)0x10000002) | |
| 3542 #define JVMPI_VERSION_1_2 ((jint)0x10000003) | |
| 3543 #endif // !JVMPI_VERSION_1 | |
| 3544 | |
| 3545 Thread* thread = ThreadLocalStorage::thread(); | |
| 3546 if (thread != NULL && thread->is_Java_thread()) { | |
| 3547 if (Threads::is_supported_jni_version_including_1_1(version)) { | |
| 3548 *(JNIEnv**)penv = ((JavaThread*) thread)->jni_environment(); | |
| 3549 ret = JNI_OK; | |
| 3550 return ret; | |
| 3551 | |
| 3552 } else if (version == JVMPI_VERSION_1 || | |
| 3553 version == JVMPI_VERSION_1_1 || | |
| 3554 version == JVMPI_VERSION_1_2) { | |
| 3555 tty->print_cr("ERROR: JVMPI, an experimental interface, is no longer supported."); | |
| 3556 tty->print_cr("Please use the supported interface: the JVM Tool Interface (JVM TI)."); | |
| 3557 ret = JNI_EVERSION; | |
| 3558 return ret; | |
| 3559 } else if (JvmtiExport::is_jvmdi_version(version)) { | |
| 3560 tty->print_cr("FATAL ERROR: JVMDI is no longer supported."); | |
| 3561 tty->print_cr("Please use the supported interface: the JVM Tool Interface (JVM TI)."); | |
| 3562 ret = JNI_EVERSION; | |
| 3563 return ret; | |
| 3564 } else { | |
| 3565 *penv = NULL; | |
| 3566 ret = JNI_EVERSION; | |
| 3567 return ret; | |
| 3568 } | |
| 3569 } else { | |
| 3570 *penv = NULL; | |
| 3571 ret = JNI_EDETACHED; | |
| 3572 return ret; | |
| 3573 } | |
| 3574 } | |
| 3575 | |
| 3576 | |
| 3577 jint JNICALL jni_AttachCurrentThreadAsDaemon(JavaVM *vm, void **penv, void *_args) { | |
| 3578 DTRACE_PROBE3(hotspot_jni, AttachCurrentThreadAsDaemon__entry, vm, penv, _args); | |
| 3579 if (!vm_created) { | |
| 3580 DTRACE_PROBE1(hotspot_jni, AttachCurrentThreadAsDaemon__return, JNI_ERR); | |
| 3581 return JNI_ERR; | |
| 3582 } | |
| 3583 | |
| 3584 JNIWrapper("AttachCurrentThreadAsDaemon"); | |
| 3585 jint ret = attach_current_thread(vm, penv, _args, true); | |
| 3586 DTRACE_PROBE1(hotspot_jni, AttachCurrentThreadAsDaemon__return, ret); | |
| 3587 return ret; | |
| 3588 } | |
| 3589 | |
| 3590 | |
| 3591 } // End extern "C" | |
| 3592 | |
| 3593 const struct JNIInvokeInterface_ jni_InvokeInterface = { | |
| 3594 NULL, | |
| 3595 NULL, | |
| 3596 NULL, | |
| 3597 | |
| 3598 jni_DestroyJavaVM, | |
| 3599 jni_AttachCurrentThread, | |
| 3600 jni_DetachCurrentThread, | |
| 3601 jni_GetEnv, | |
| 3602 jni_AttachCurrentThreadAsDaemon | |
| 3603 }; |