Mercurial > hg > truffle
annotate src/share/vm/prims/jni.cpp @ 2376:c7f3d0b4570f
7017732: move static fields into Class to prepare for perm gen removal
Reviewed-by: kvn, coleenp, twisti, stefank
| author | never |
|---|---|
| date | Fri, 18 Mar 2011 16:00:34 -0700 |
| parents | 3582bf76420e |
| children | 0654ee04b214 e1162778c1c8 |
| rev | line source |
|---|---|
| 0 | 1 /* |
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2 * Copyright (c) 1997, 2011, Oracle and/or its affiliates. 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 * | |
|
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
| 0 | 22 * |
| 23 */ | |
| 24 | |
| 1972 | 25 #include "precompiled.hpp" |
| 26 #include "classfile/classLoader.hpp" | |
| 27 #include "classfile/javaClasses.hpp" | |
| 28 #include "classfile/symbolTable.hpp" | |
| 29 #include "classfile/systemDictionary.hpp" | |
| 30 #include "classfile/vmSymbols.hpp" | |
| 31 #include "interpreter/linkResolver.hpp" | |
| 32 #include "memory/allocation.inline.hpp" | |
| 33 #include "memory/gcLocker.inline.hpp" | |
| 34 #include "memory/oopFactory.hpp" | |
| 35 #include "memory/universe.inline.hpp" | |
| 36 #include "oops/instanceKlass.hpp" | |
| 37 #include "oops/instanceOop.hpp" | |
| 38 #include "oops/markOop.hpp" | |
| 39 #include "oops/methodOop.hpp" | |
| 40 #include "oops/objArrayKlass.hpp" | |
| 41 #include "oops/objArrayOop.hpp" | |
| 42 #include "oops/oop.inline.hpp" | |
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43 #include "oops/symbol.hpp" |
| 1972 | 44 #include "oops/typeArrayKlass.hpp" |
| 45 #include "oops/typeArrayOop.hpp" | |
| 46 #include "prims/jni.h" | |
| 47 #include "prims/jniCheck.hpp" | |
| 48 #include "prims/jniFastGetField.hpp" | |
| 49 #include "prims/jvm.h" | |
| 50 #include "prims/jvm_misc.hpp" | |
| 51 #include "prims/jvmtiExport.hpp" | |
| 52 #include "prims/jvmtiThreadState.hpp" | |
| 53 #include "runtime/compilationPolicy.hpp" | |
| 54 #include "runtime/fieldDescriptor.hpp" | |
| 55 #include "runtime/fprofiler.hpp" | |
| 56 #include "runtime/handles.inline.hpp" | |
| 57 #include "runtime/interfaceSupport.hpp" | |
| 58 #include "runtime/java.hpp" | |
| 59 #include "runtime/javaCalls.hpp" | |
| 60 #include "runtime/jfieldIDWorkaround.hpp" | |
| 61 #include "runtime/reflection.hpp" | |
| 62 #include "runtime/sharedRuntime.hpp" | |
| 63 #include "runtime/signature.hpp" | |
| 64 #include "runtime/vm_operations.hpp" | |
| 65 #include "services/runtimeService.hpp" | |
| 66 #include "utilities/defaultStream.hpp" | |
| 67 #include "utilities/dtrace.hpp" | |
| 68 #include "utilities/events.hpp" | |
| 69 #include "utilities/histogram.hpp" | |
| 70 #ifdef TARGET_ARCH_x86 | |
| 71 # include "jniTypes_x86.hpp" | |
| 72 #endif | |
| 73 #ifdef TARGET_ARCH_sparc | |
| 74 # include "jniTypes_sparc.hpp" | |
| 75 #endif | |
| 76 #ifdef TARGET_ARCH_zero | |
| 77 # include "jniTypes_zero.hpp" | |
| 78 #endif | |
| 79 #ifdef TARGET_OS_FAMILY_linux | |
| 80 # include "os_linux.inline.hpp" | |
| 81 # include "thread_linux.inline.hpp" | |
| 82 #endif | |
| 83 #ifdef TARGET_OS_FAMILY_solaris | |
| 84 # include "os_solaris.inline.hpp" | |
| 85 # include "thread_solaris.inline.hpp" | |
| 86 #endif | |
| 87 #ifdef TARGET_OS_FAMILY_windows | |
| 88 # include "os_windows.inline.hpp" | |
| 89 # include "thread_windows.inline.hpp" | |
| 90 #endif | |
| 0 | 91 |
| 92 static jint CurrentVersion = JNI_VERSION_1_6; | |
| 93 | |
| 94 | |
| 95 // The DT_RETURN_MARK macros create a scoped object to fire the dtrace | |
| 96 // '-return' probe regardless of the return path is taken out of the function. | |
| 97 // Methods that have multiple return paths use this to avoid having to | |
| 98 // instrument each return path. Methods that use CHECK or THROW must use this | |
| 99 // since those macros can cause an immedate uninstrumented return. | |
| 100 // | |
| 101 // In order to get the return value, a reference to the variable containing | |
| 102 // the return value must be passed to the contructor of the object, and | |
| 103 // the return value must be set before return (since the mark object has | |
| 104 // a reference to it). | |
| 105 // | |
| 106 // Example: | |
| 107 // DT_RETURN_MARK_DECL(SomeFunc, int); | |
| 108 // JNI_ENTRY(int, SomeFunc, ...) | |
| 109 // int return_value = 0; | |
| 110 // DT_RETURN_MARK(SomeFunc, int, (const int&)return_value); | |
| 111 // foo(CHECK_0) | |
| 112 // return_value = 5; | |
| 113 // return return_value; | |
| 114 // JNI_END | |
| 115 #define DT_RETURN_MARK_DECL(name, type) \ | |
| 116 HS_DTRACE_PROBE_DECL1(hotspot_jni, name##__return, type); \ | |
| 117 DTRACE_ONLY( \ | |
| 118 class DTraceReturnProbeMark_##name { \ | |
| 119 public: \ | |
| 120 const type& _ret_ref; \ | |
| 121 DTraceReturnProbeMark_##name(const type& v) : _ret_ref(v) {} \ | |
| 122 ~DTraceReturnProbeMark_##name() { \ | |
| 123 HS_DTRACE_PROBE1(hotspot_jni, name##__return, _ret_ref); \ | |
| 124 } \ | |
| 125 } \ | |
| 126 ) | |
| 127 // Void functions are simpler since there's no return value | |
| 128 #define DT_VOID_RETURN_MARK_DECL(name) \ | |
| 129 HS_DTRACE_PROBE_DECL0(hotspot_jni, name##__return); \ | |
| 130 DTRACE_ONLY( \ | |
| 131 class DTraceReturnProbeMark_##name { \ | |
| 132 public: \ | |
| 133 ~DTraceReturnProbeMark_##name() { \ | |
| 134 HS_DTRACE_PROBE0(hotspot_jni, name##__return); \ | |
| 135 } \ | |
| 136 } \ | |
| 137 ) | |
| 138 | |
| 139 | |
| 140 // Place these macros in the function to mark the return. Non-void | |
| 141 // functions need the type and address of the return value. | |
| 142 #define DT_RETURN_MARK(name, type, ref) \ | |
| 143 DTRACE_ONLY( DTraceReturnProbeMark_##name dtrace_return_mark(ref) ) | |
| 144 #define DT_VOID_RETURN_MARK(name) \ | |
| 145 DTRACE_ONLY( DTraceReturnProbeMark_##name dtrace_return_mark ) | |
| 146 | |
| 147 | |
| 148 // Use these to select distinct code for floating-point vs. non-floating point | |
| 149 // situations. Used from within common macros where we need slightly | |
| 150 // different behavior for Float/Double | |
| 151 #define FP_SELECT_Boolean(intcode, fpcode) intcode | |
| 152 #define FP_SELECT_Byte(intcode, fpcode) intcode | |
| 153 #define FP_SELECT_Char(intcode, fpcode) intcode | |
| 154 #define FP_SELECT_Short(intcode, fpcode) intcode | |
| 155 #define FP_SELECT_Object(intcode, fpcode) intcode | |
| 156 #define FP_SELECT_Int(intcode, fpcode) intcode | |
| 157 #define FP_SELECT_Long(intcode, fpcode) intcode | |
| 158 #define FP_SELECT_Float(intcode, fpcode) fpcode | |
| 159 #define FP_SELECT_Double(intcode, fpcode) fpcode | |
| 160 #define FP_SELECT(TypeName, intcode, fpcode) \ | |
| 161 FP_SELECT_##TypeName(intcode, fpcode) | |
| 162 | |
| 163 #define COMMA , | |
| 164 | |
| 165 // Choose DT_RETURN_MARK macros based on the type: float/double -> void | |
| 166 // (dtrace doesn't do FP yet) | |
| 167 #define DT_RETURN_MARK_DECL_FOR(TypeName, name, type) \ | |
| 168 FP_SELECT(TypeName, \ | |
| 169 DT_RETURN_MARK_DECL(name, type), DT_VOID_RETURN_MARK_DECL(name) ) | |
| 170 #define DT_RETURN_MARK_FOR(TypeName, name, type, ref) \ | |
| 171 FP_SELECT(TypeName, \ | |
| 172 DT_RETURN_MARK(name, type, ref), DT_VOID_RETURN_MARK(name) ) | |
| 173 | |
| 174 | |
| 175 // out-of-line helpers for class jfieldIDWorkaround: | |
| 176 | |
| 177 bool jfieldIDWorkaround::is_valid_jfieldID(klassOop k, jfieldID id) { | |
| 178 if (jfieldIDWorkaround::is_instance_jfieldID(k, id)) { | |
| 179 uintptr_t as_uint = (uintptr_t) id; | |
| 180 intptr_t offset = raw_instance_offset(id); | |
| 181 if (is_checked_jfieldID(id)) { | |
| 182 if (!klass_hash_ok(k, id)) { | |
| 183 return false; | |
| 184 } | |
| 185 } | |
| 186 return instanceKlass::cast(k)->contains_field_offset(offset); | |
| 187 } else { | |
| 188 JNIid* result = (JNIid*) id; | |
| 189 #ifdef ASSERT | |
| 190 return result != NULL && result->is_static_field_id(); | |
| 191 #else | |
| 192 return result != NULL; | |
| 193 #endif | |
| 194 } | |
| 195 } | |
| 196 | |
| 197 | |
| 198 intptr_t jfieldIDWorkaround::encode_klass_hash(klassOop k, intptr_t offset) { | |
| 199 if (offset <= small_offset_mask) { | |
| 200 klassOop field_klass = k; | |
| 201 klassOop super_klass = Klass::cast(field_klass)->super(); | |
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202 // With compressed oops the most super class with nonstatic fields would |
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203 // be the owner of fields embedded in the header. |
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204 while (instanceKlass::cast(super_klass)->has_nonstatic_fields() && |
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205 instanceKlass::cast(super_klass)->contains_field_offset(offset)) { |
| 0 | 206 field_klass = super_klass; // super contains the field also |
| 207 super_klass = Klass::cast(field_klass)->super(); | |
| 208 } | |
| 209 debug_only(No_Safepoint_Verifier nosafepoint;) | |
| 210 uintptr_t klass_hash = field_klass->identity_hash(); | |
| 211 return ((klass_hash & klass_mask) << klass_shift) | checked_mask_in_place; | |
| 212 } else { | |
| 213 #if 0 | |
| 214 #ifndef PRODUCT | |
| 215 { | |
| 216 ResourceMark rm; | |
| 217 warning("VerifyJNIFields: long offset %d in %s", offset, Klass::cast(k)->external_name()); | |
| 218 } | |
| 219 #endif | |
| 220 #endif | |
| 221 return 0; | |
| 222 } | |
| 223 } | |
| 224 | |
| 225 bool jfieldIDWorkaround::klass_hash_ok(klassOop k, jfieldID id) { | |
| 226 uintptr_t as_uint = (uintptr_t) id; | |
| 227 intptr_t klass_hash = (as_uint >> klass_shift) & klass_mask; | |
| 228 do { | |
| 229 debug_only(No_Safepoint_Verifier nosafepoint;) | |
| 230 // Could use a non-blocking query for identity_hash here... | |
| 231 if ((k->identity_hash() & klass_mask) == klass_hash) | |
| 232 return true; | |
| 233 k = Klass::cast(k)->super(); | |
| 234 } while (k != NULL); | |
| 235 return false; | |
| 236 } | |
| 237 | |
| 238 void jfieldIDWorkaround::verify_instance_jfieldID(klassOop k, jfieldID id) { | |
| 239 guarantee(jfieldIDWorkaround::is_instance_jfieldID(k, id), "must be an instance field" ); | |
| 240 uintptr_t as_uint = (uintptr_t) id; | |
| 241 intptr_t offset = raw_instance_offset(id); | |
| 242 if (VerifyJNIFields) { | |
| 243 if (is_checked_jfieldID(id)) { | |
| 244 guarantee(klass_hash_ok(k, id), | |
| 245 "Bug in native code: jfieldID class must match object"); | |
| 246 } else { | |
| 247 #if 0 | |
| 248 #ifndef PRODUCT | |
| 249 if (Verbose) { | |
| 250 ResourceMark rm; | |
| 251 warning("VerifyJNIFields: unverified offset %d for %s", offset, Klass::cast(k)->external_name()); | |
| 252 } | |
| 253 #endif | |
| 254 #endif | |
| 255 } | |
| 256 } | |
| 257 guarantee(instanceKlass::cast(k)->contains_field_offset(offset), | |
| 258 "Bug in native code: jfieldID offset must address interior of object"); | |
| 259 } | |
| 260 | |
| 261 // Pick a reasonable higher bound for local capacity requested | |
| 262 // for EnsureLocalCapacity and PushLocalFrame. We don't want it too | |
| 263 // high because a test (or very unusual application) may try to allocate | |
| 264 // that many handles and run out of swap space. An implementation is | |
| 265 // permitted to allocate more handles than the ensured capacity, so this | |
| 266 // value is set high enough to prevent compatibility problems. | |
| 267 const int MAX_REASONABLE_LOCAL_CAPACITY = 4*K; | |
| 268 | |
| 269 | |
| 270 // Wrapper to trace JNI functions | |
| 271 | |
| 272 #ifdef ASSERT | |
| 273 Histogram* JNIHistogram; | |
| 274 static volatile jint JNIHistogram_lock = 0; | |
| 275 | |
| 276 class JNITraceWrapper : public StackObj { | |
| 277 public: | |
| 278 JNITraceWrapper(const char* format, ...) { | |
| 279 if (TraceJNICalls) { | |
| 280 va_list ap; | |
| 281 va_start(ap, format); | |
| 282 tty->print("JNI "); | |
| 283 tty->vprint_cr(format, ap); | |
| 284 va_end(ap); | |
| 285 } | |
| 286 } | |
| 287 }; | |
| 288 | |
| 289 class JNIHistogramElement : public HistogramElement { | |
| 290 public: | |
| 291 JNIHistogramElement(const char* name); | |
| 292 }; | |
| 293 | |
| 294 JNIHistogramElement::JNIHistogramElement(const char* elementName) { | |
| 295 _name = elementName; | |
| 296 uintx count = 0; | |
| 297 | |
| 298 while (Atomic::cmpxchg(1, &JNIHistogram_lock, 0) != 0) { | |
| 299 while (OrderAccess::load_acquire(&JNIHistogram_lock) != 0) { | |
| 300 count +=1; | |
| 301 if ( (WarnOnStalledSpinLock > 0) | |
| 302 && (count % WarnOnStalledSpinLock == 0)) { | |
| 303 warning("JNIHistogram_lock seems to be stalled"); | |
| 304 } | |
| 305 } | |
| 306 } | |
| 307 | |
| 308 | |
| 309 if(JNIHistogram == NULL) | |
| 310 JNIHistogram = new Histogram("JNI Call Counts",100); | |
| 311 | |
| 312 JNIHistogram->add_element(this); | |
| 313 Atomic::dec(&JNIHistogram_lock); | |
| 314 } | |
| 315 | |
| 316 #define JNICountWrapper(arg) \ | |
| 317 static JNIHistogramElement* e = new JNIHistogramElement(arg); \ | |
| 318 /* There is a MT-race condition in VC++. So we need to make sure that that e has been initialized */ \ | |
| 319 if (e != NULL) e->increment_count() | |
| 320 #define JNIWrapper(arg) JNICountWrapper(arg); JNITraceWrapper(arg) | |
| 321 #else | |
| 322 #define JNIWrapper(arg) | |
| 323 #endif | |
| 324 | |
| 325 | |
| 326 // Implementation of JNI entries | |
| 327 | |
| 328 DT_RETURN_MARK_DECL(DefineClass, jclass); | |
| 329 | |
| 330 JNI_ENTRY(jclass, jni_DefineClass(JNIEnv *env, const char *name, jobject loaderRef, | |
| 331 const jbyte *buf, jsize bufLen)) | |
| 332 JNIWrapper("DefineClass"); | |
| 333 | |
| 334 DTRACE_PROBE5(hotspot_jni, DefineClass__entry, | |
| 335 env, name, loaderRef, buf, bufLen); | |
| 336 jclass cls = NULL; | |
| 337 DT_RETURN_MARK(DefineClass, jclass, (const jclass&)cls); | |
| 338 | |
| 339 // Since exceptions can be thrown, class initialization can take place | |
| 340 // if name is NULL no check for class name in .class stream has to be made. | |
| 341 if (name != NULL) { | |
| 342 const int str_len = (int)strlen(name); | |
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343 if (str_len > Symbol::max_length()) { |
| 0 | 344 // It's impossible to create this class; the name cannot fit |
| 345 // into the constant pool. | |
| 346 THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), name); | |
| 347 } | |
| 348 } | |
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349 TempNewSymbol class_name = SymbolTable::new_symbol(name, THREAD); |
| 0 | 350 |
| 351 ResourceMark rm(THREAD); | |
| 352 ClassFileStream st((u1*) buf, bufLen, NULL); | |
| 353 Handle class_loader (THREAD, JNIHandles::resolve(loaderRef)); | |
| 354 | |
| 355 if (UsePerfData && !class_loader.is_null()) { | |
| 356 // check whether the current caller thread holds the lock or not. | |
| 357 // If not, increment the corresponding counter | |
| 358 if (ObjectSynchronizer:: | |
| 359 query_lock_ownership((JavaThread*)THREAD, class_loader) != | |
| 360 ObjectSynchronizer::owner_self) { | |
| 361 ClassLoader::sync_JNIDefineClassLockFreeCounter()->inc(); | |
| 362 } | |
| 363 } | |
| 364 klassOop k = SystemDictionary::resolve_from_stream(class_name, class_loader, | |
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365 Handle(), &st, true, |
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366 CHECK_NULL); |
| 0 | 367 |
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368 if (TraceClassResolution && k != NULL) { |
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369 trace_class_resolution(k); |
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370 } |
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371 |
| 0 | 372 cls = (jclass)JNIHandles::make_local( |
| 373 env, Klass::cast(k)->java_mirror()); | |
| 374 return cls; | |
| 375 JNI_END | |
| 376 | |
| 377 | |
| 378 | |
| 379 static bool first_time_FindClass = true; | |
| 380 | |
| 381 DT_RETURN_MARK_DECL(FindClass, jclass); | |
| 382 | |
| 383 JNI_ENTRY(jclass, jni_FindClass(JNIEnv *env, const char *name)) | |
| 384 JNIWrapper("FindClass"); | |
| 385 DTRACE_PROBE2(hotspot_jni, FindClass__entry, env, name); | |
| 386 | |
| 387 jclass result = NULL; | |
| 388 DT_RETURN_MARK(FindClass, jclass, (const jclass&)result); | |
| 389 | |
| 390 // Remember if we are the first invocation of jni_FindClass | |
| 391 bool first_time = first_time_FindClass; | |
| 392 first_time_FindClass = false; | |
| 393 | |
| 394 // Sanity check the name: it cannot be null or larger than the maximum size | |
| 395 // name we can fit in the constant pool. | |
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396 if (name == NULL || (int)strlen(name) > Symbol::max_length()) { |
| 0 | 397 THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), name); |
| 398 } | |
| 399 | |
| 400 //%note jni_3 | |
| 401 Handle loader; | |
| 402 Handle protection_domain; | |
| 403 // Find calling class | |
| 404 instanceKlassHandle k (THREAD, thread->security_get_caller_class(0)); | |
| 405 if (k.not_null()) { | |
| 406 loader = Handle(THREAD, k->class_loader()); | |
| 407 // Special handling to make sure JNI_OnLoad and JNI_OnUnload are executed | |
| 408 // in the correct class context. | |
| 409 if (loader.is_null() && | |
| 410 k->name() == vmSymbols::java_lang_ClassLoader_NativeLibrary()) { | |
| 411 JavaValue result(T_OBJECT); | |
| 412 JavaCalls::call_static(&result, k, | |
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413 vmSymbols::getFromClass_name(), |
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414 vmSymbols::void_class_signature(), |
| 0 | 415 thread); |
| 416 if (HAS_PENDING_EXCEPTION) { | |
| 417 Handle ex(thread, thread->pending_exception()); | |
| 418 CLEAR_PENDING_EXCEPTION; | |
| 419 THROW_HANDLE_0(ex); | |
| 420 } | |
| 421 oop mirror = (oop) result.get_jobject(); | |
| 422 loader = Handle(THREAD, | |
| 423 instanceKlass::cast(java_lang_Class::as_klassOop(mirror))->class_loader()); | |
| 424 protection_domain = Handle(THREAD, | |
| 425 instanceKlass::cast(java_lang_Class::as_klassOop(mirror))->protection_domain()); | |
| 426 } | |
| 427 } else { | |
| 428 // We call ClassLoader.getSystemClassLoader to obtain the system class loader. | |
| 429 loader = Handle(THREAD, SystemDictionary::java_system_loader()); | |
| 430 } | |
| 431 | |
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432 TempNewSymbol sym = SymbolTable::new_symbol(name, CHECK_NULL); |
| 0 | 433 result = find_class_from_class_loader(env, sym, true, loader, |
| 434 protection_domain, true, thread); | |
| 435 | |
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436 if (TraceClassResolution && result != NULL) { |
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437 trace_class_resolution(java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(result))); |
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438 } |
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439 |
| 0 | 440 // If we were the first invocation of jni_FindClass, we enable compilation again |
| 441 // rather than just allowing invocation counter to overflow and decay. | |
| 442 // Controlled by flag DelayCompilationDuringStartup. | |
| 443 if (first_time && !CompileTheWorld) | |
| 444 CompilationPolicy::completed_vm_startup(); | |
| 445 | |
| 446 return result; | |
| 447 JNI_END | |
| 448 | |
| 449 DT_RETURN_MARK_DECL(FromReflectedMethod, jmethodID); | |
| 450 | |
| 451 JNI_ENTRY(jmethodID, jni_FromReflectedMethod(JNIEnv *env, jobject method)) | |
| 452 JNIWrapper("FromReflectedMethod"); | |
| 453 DTRACE_PROBE2(hotspot_jni, FromReflectedMethod__entry, env, method); | |
| 454 jmethodID ret = NULL; | |
| 455 DT_RETURN_MARK(FromReflectedMethod, jmethodID, (const jmethodID&)ret); | |
| 456 | |
| 457 // method is a handle to a java.lang.reflect.Method object | |
| 458 oop reflected = JNIHandles::resolve_non_null(method); | |
| 459 oop mirror = NULL; | |
| 460 int slot = 0; | |
| 461 | |
| 1142 | 462 if (reflected->klass() == SystemDictionary::reflect_Constructor_klass()) { |
| 0 | 463 mirror = java_lang_reflect_Constructor::clazz(reflected); |
| 464 slot = java_lang_reflect_Constructor::slot(reflected); | |
| 465 } else { | |
| 1142 | 466 assert(reflected->klass() == SystemDictionary::reflect_Method_klass(), "wrong type"); |
| 0 | 467 mirror = java_lang_reflect_Method::clazz(reflected); |
| 468 slot = java_lang_reflect_Method::slot(reflected); | |
| 469 } | |
| 470 klassOop k = java_lang_Class::as_klassOop(mirror); | |
| 471 | |
| 472 KlassHandle k1(THREAD, k); | |
| 473 // Make sure class is initialized before handing id's out to methods | |
| 474 Klass::cast(k1())->initialize(CHECK_NULL); | |
| 475 methodOop m = instanceKlass::cast(k1())->method_with_idnum(slot); | |
| 476 ret = m==NULL? NULL : m->jmethod_id(); // return NULL if reflected method deleted | |
| 477 return ret; | |
| 478 JNI_END | |
| 479 | |
| 480 DT_RETURN_MARK_DECL(FromReflectedField, jfieldID); | |
| 481 | |
| 482 JNI_ENTRY(jfieldID, jni_FromReflectedField(JNIEnv *env, jobject field)) | |
| 483 JNIWrapper("FromReflectedField"); | |
| 484 DTRACE_PROBE2(hotspot_jni, FromReflectedField__entry, env, field); | |
| 485 jfieldID ret = NULL; | |
| 486 DT_RETURN_MARK(FromReflectedField, jfieldID, (const jfieldID&)ret); | |
| 487 | |
| 488 // field is a handle to a java.lang.reflect.Field object | |
| 489 oop reflected = JNIHandles::resolve_non_null(field); | |
| 490 oop mirror = java_lang_reflect_Field::clazz(reflected); | |
| 491 klassOop k = java_lang_Class::as_klassOop(mirror); | |
| 492 int slot = java_lang_reflect_Field::slot(reflected); | |
| 493 int modifiers = java_lang_reflect_Field::modifiers(reflected); | |
| 494 | |
| 495 KlassHandle k1(THREAD, k); | |
| 496 // Make sure class is initialized before handing id's out to fields | |
| 497 Klass::cast(k1())->initialize(CHECK_NULL); | |
| 498 | |
| 499 // First check if this is a static field | |
| 500 if (modifiers & JVM_ACC_STATIC) { | |
| 501 intptr_t offset = instanceKlass::cast(k1())->offset_from_fields( slot ); | |
| 502 JNIid* id = instanceKlass::cast(k1())->jni_id_for(offset); | |
| 503 assert(id != NULL, "corrupt Field object"); | |
| 504 debug_only(id->set_is_static_field_id();) | |
| 505 // A jfieldID for a static field is a JNIid specifying the field holder and the offset within the klassOop | |
| 506 ret = jfieldIDWorkaround::to_static_jfieldID(id); | |
| 507 return ret; | |
| 508 } | |
| 509 | |
| 510 // The slot is the index of the field description in the field-array | |
| 511 // The jfieldID is the offset of the field within the object | |
| 512 // It may also have hash bits for k, if VerifyJNIFields is turned on. | |
| 513 intptr_t offset = instanceKlass::cast(k1())->offset_from_fields( slot ); | |
| 514 assert(instanceKlass::cast(k1())->contains_field_offset(offset), "stay within object"); | |
| 515 ret = jfieldIDWorkaround::to_instance_jfieldID(k1(), offset); | |
| 516 return ret; | |
| 517 JNI_END | |
| 518 | |
| 519 DT_RETURN_MARK_DECL(ToReflectedMethod, jobject); | |
| 520 | |
| 521 JNI_ENTRY(jobject, jni_ToReflectedMethod(JNIEnv *env, jclass cls, jmethodID method_id, jboolean isStatic)) | |
| 522 JNIWrapper("ToReflectedMethod"); | |
| 523 DTRACE_PROBE4(hotspot_jni, ToReflectedMethod__entry, env, cls, method_id, isStatic); | |
| 524 jobject ret = NULL; | |
| 525 DT_RETURN_MARK(ToReflectedMethod, jobject, (const jobject&)ret); | |
| 526 | |
| 527 methodHandle m (THREAD, JNIHandles::resolve_jmethod_id(method_id)); | |
| 528 assert(m->is_static() == (isStatic != 0), "jni_ToReflectedMethod access flags doesn't match"); | |
| 529 oop reflection_method; | |
| 530 if (m->is_initializer()) { | |
| 531 reflection_method = Reflection::new_constructor(m, CHECK_NULL); | |
| 532 } else { | |
| 533 reflection_method = Reflection::new_method(m, UseNewReflection, false, CHECK_NULL); | |
| 534 } | |
| 535 ret = JNIHandles::make_local(env, reflection_method); | |
| 536 return ret; | |
| 537 JNI_END | |
| 538 | |
| 539 DT_RETURN_MARK_DECL(GetSuperclass, jclass); | |
| 540 | |
| 541 JNI_ENTRY(jclass, jni_GetSuperclass(JNIEnv *env, jclass sub)) | |
| 542 JNIWrapper("GetSuperclass"); | |
| 543 DTRACE_PROBE2(hotspot_jni, GetSuperclass__entry, env, sub); | |
| 544 jclass obj = NULL; | |
| 545 DT_RETURN_MARK(GetSuperclass, jclass, (const jclass&)obj); | |
| 546 | |
| 547 oop mirror = JNIHandles::resolve_non_null(sub); | |
| 548 // primitive classes return NULL | |
| 549 if (java_lang_Class::is_primitive(mirror)) return NULL; | |
| 550 | |
| 551 // Rules of Class.getSuperClass as implemented by KLass::java_super: | |
| 552 // arrays return Object | |
| 553 // interfaces return NULL | |
| 554 // proper classes return Klass::super() | |
| 555 klassOop k = java_lang_Class::as_klassOop(mirror); | |
| 556 if (Klass::cast(k)->is_interface()) return NULL; | |
| 557 | |
| 558 // return mirror for superclass | |
| 559 klassOop super = Klass::cast(k)->java_super(); | |
| 560 // super2 is the value computed by the compiler's getSuperClass intrinsic: | |
| 561 debug_only(klassOop super2 = ( Klass::cast(k)->oop_is_javaArray() | |
| 1142 | 562 ? SystemDictionary::Object_klass() |
| 0 | 563 : Klass::cast(k)->super() ) ); |
| 564 assert(super == super2, | |
| 565 "java_super computation depends on interface, array, other super"); | |
| 566 obj = (super == NULL) ? NULL : (jclass) JNIHandles::make_local(Klass::cast(super)->java_mirror()); | |
| 567 return obj; | |
| 568 JNI_END | |
| 569 | |
| 570 JNI_QUICK_ENTRY(jboolean, jni_IsAssignableFrom(JNIEnv *env, jclass sub, jclass super)) | |
| 571 JNIWrapper("IsSubclassOf"); | |
| 572 DTRACE_PROBE3(hotspot_jni, IsAssignableFrom__entry, env, sub, super); | |
| 573 oop sub_mirror = JNIHandles::resolve_non_null(sub); | |
| 574 oop super_mirror = JNIHandles::resolve_non_null(super); | |
| 575 if (java_lang_Class::is_primitive(sub_mirror) || | |
| 576 java_lang_Class::is_primitive(super_mirror)) { | |
| 577 jboolean ret = (sub_mirror == super_mirror); | |
| 578 DTRACE_PROBE1(hotspot_jni, IsAssignableFrom__return, ret); | |
| 579 return ret; | |
| 580 } | |
| 581 klassOop sub_klass = java_lang_Class::as_klassOop(sub_mirror); | |
| 582 klassOop super_klass = java_lang_Class::as_klassOop(super_mirror); | |
| 583 assert(sub_klass != NULL && super_klass != NULL, "invalid arguments to jni_IsAssignableFrom"); | |
| 584 jboolean ret = Klass::cast(sub_klass)->is_subtype_of(super_klass) ? | |
| 585 JNI_TRUE : JNI_FALSE; | |
| 586 DTRACE_PROBE1(hotspot_jni, IsAssignableFrom__return, ret); | |
| 587 return ret; | |
| 588 JNI_END | |
| 589 | |
| 590 DT_RETURN_MARK_DECL(Throw, jint); | |
| 591 | |
| 592 JNI_ENTRY(jint, jni_Throw(JNIEnv *env, jthrowable obj)) | |
| 593 JNIWrapper("Throw"); | |
| 594 DTRACE_PROBE2(hotspot_jni, Throw__entry, env, obj); | |
| 595 jint ret = JNI_OK; | |
| 596 DT_RETURN_MARK(Throw, jint, (const jint&)ret); | |
| 597 | |
| 598 THROW_OOP_(JNIHandles::resolve(obj), JNI_OK); | |
| 599 ShouldNotReachHere(); | |
| 600 JNI_END | |
| 601 | |
| 602 DT_RETURN_MARK_DECL(ThrowNew, jint); | |
| 603 | |
| 604 JNI_ENTRY(jint, jni_ThrowNew(JNIEnv *env, jclass clazz, const char *message)) | |
| 605 JNIWrapper("ThrowNew"); | |
| 606 DTRACE_PROBE3(hotspot_jni, ThrowNew__entry, env, clazz, message); | |
| 607 jint ret = JNI_OK; | |
| 608 DT_RETURN_MARK(ThrowNew, jint, (const jint&)ret); | |
| 609 | |
| 610 instanceKlass* k = instanceKlass::cast(java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(clazz))); | |
|
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611 Symbol* name = k->name(); |
| 0 | 612 Handle class_loader (THREAD, k->class_loader()); |
| 613 Handle protection_domain (THREAD, k->protection_domain()); | |
| 614 THROW_MSG_LOADER_(name, (char *)message, class_loader, protection_domain, JNI_OK); | |
| 615 ShouldNotReachHere(); | |
| 616 JNI_END | |
| 617 | |
| 618 | |
| 619 // JNI functions only transform a pending async exception to a synchronous | |
| 620 // exception in ExceptionOccurred and ExceptionCheck calls, since | |
| 621 // delivering an async exception in other places won't change the native | |
| 622 // code's control flow and would be harmful when native code further calls | |
| 623 // JNI functions with a pending exception. Async exception is also checked | |
| 624 // during the call, so ExceptionOccurred/ExceptionCheck won't return | |
| 625 // false but deliver the async exception at the very end during | |
| 626 // state transition. | |
| 627 | |
| 628 static void jni_check_async_exceptions(JavaThread *thread) { | |
| 629 assert(thread == Thread::current(), "must be itself"); | |
| 630 thread->check_and_handle_async_exceptions(); | |
| 631 } | |
| 632 | |
| 633 JNI_ENTRY_NO_PRESERVE(jthrowable, jni_ExceptionOccurred(JNIEnv *env)) | |
| 634 JNIWrapper("ExceptionOccurred"); | |
| 635 DTRACE_PROBE1(hotspot_jni, ExceptionOccurred__entry, env); | |
| 636 jni_check_async_exceptions(thread); | |
| 637 oop exception = thread->pending_exception(); | |
| 638 jthrowable ret = (jthrowable) JNIHandles::make_local(env, exception); | |
| 639 DTRACE_PROBE1(hotspot_jni, ExceptionOccurred__return, ret); | |
| 640 return ret; | |
| 641 JNI_END | |
| 642 | |
| 643 | |
| 644 JNI_ENTRY_NO_PRESERVE(void, jni_ExceptionDescribe(JNIEnv *env)) | |
| 645 JNIWrapper("ExceptionDescribe"); | |
| 646 DTRACE_PROBE1(hotspot_jni, ExceptionDescribe__entry, env); | |
| 647 if (thread->has_pending_exception()) { | |
| 648 Handle ex(thread, thread->pending_exception()); | |
| 649 thread->clear_pending_exception(); | |
| 1142 | 650 if (ex->is_a(SystemDictionary::ThreadDeath_klass())) { |
| 0 | 651 // Don't print anything if we are being killed. |
| 652 } else { | |
| 653 jio_fprintf(defaultStream::error_stream(), "Exception "); | |
| 654 if (thread != NULL && thread->threadObj() != NULL) { | |
| 655 ResourceMark rm(THREAD); | |
| 656 jio_fprintf(defaultStream::error_stream(), | |
| 657 "in thread \"%s\" ", thread->get_thread_name()); | |
| 658 } | |
| 1142 | 659 if (ex->is_a(SystemDictionary::Throwable_klass())) { |
| 0 | 660 JavaValue result(T_VOID); |
| 661 JavaCalls::call_virtual(&result, | |
| 662 ex, | |
| 663 KlassHandle(THREAD, | |
| 1142 | 664 SystemDictionary::Throwable_klass()), |
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665 vmSymbols::printStackTrace_name(), |
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666 vmSymbols::void_method_signature(), |
| 0 | 667 THREAD); |
| 668 // If an exception is thrown in the call it gets thrown away. Not much | |
| 669 // we can do with it. The native code that calls this, does not check | |
| 670 // for the exception - hence, it might still be in the thread when DestroyVM gets | |
| 671 // called, potentially causing a few asserts to trigger - since no pending exception | |
| 672 // is expected. | |
| 673 CLEAR_PENDING_EXCEPTION; | |
| 674 } else { | |
| 675 ResourceMark rm(THREAD); | |
| 676 jio_fprintf(defaultStream::error_stream(), | |
| 677 ". Uncaught exception of type %s.", | |
| 678 Klass::cast(ex->klass())->external_name()); | |
| 679 } | |
| 680 } | |
| 681 } | |
| 682 DTRACE_PROBE(hotspot_jni, ExceptionDescribe__return); | |
| 683 JNI_END | |
| 684 | |
| 685 | |
| 686 JNI_QUICK_ENTRY(void, jni_ExceptionClear(JNIEnv *env)) | |
| 687 JNIWrapper("ExceptionClear"); | |
| 688 DTRACE_PROBE1(hotspot_jni, ExceptionClear__entry, env); | |
| 689 | |
| 690 // The jni code might be using this API to clear java thrown exception. | |
| 691 // So just mark jvmti thread exception state as exception caught. | |
| 692 JvmtiThreadState *state = JavaThread::current()->jvmti_thread_state(); | |
| 693 if (state != NULL && state->is_exception_detected()) { | |
| 694 state->set_exception_caught(); | |
| 695 } | |
| 696 thread->clear_pending_exception(); | |
| 697 DTRACE_PROBE(hotspot_jni, ExceptionClear__return); | |
| 698 JNI_END | |
| 699 | |
| 700 | |
| 701 JNI_ENTRY(void, jni_FatalError(JNIEnv *env, const char *msg)) | |
| 702 JNIWrapper("FatalError"); | |
| 703 DTRACE_PROBE2(hotspot_jni, FatalError__entry, env, msg); | |
| 704 tty->print_cr("FATAL ERROR in native method: %s", msg); | |
| 705 thread->print_stack(); | |
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706 os::abort(); // Dump core and abort |
| 0 | 707 JNI_END |
| 708 | |
| 709 | |
| 710 JNI_ENTRY(jint, jni_PushLocalFrame(JNIEnv *env, jint capacity)) | |
| 711 JNIWrapper("PushLocalFrame"); | |
| 712 DTRACE_PROBE2(hotspot_jni, PushLocalFrame__entry, env, capacity); | |
| 713 //%note jni_11 | |
| 714 if (capacity < 0 && capacity > MAX_REASONABLE_LOCAL_CAPACITY) { | |
| 715 DTRACE_PROBE1(hotspot_jni, PushLocalFrame__return, JNI_ERR); | |
| 716 return JNI_ERR; | |
| 717 } | |
| 718 JNIHandleBlock* old_handles = thread->active_handles(); | |
| 719 JNIHandleBlock* new_handles = JNIHandleBlock::allocate_block(thread); | |
| 720 assert(new_handles != NULL, "should not be NULL"); | |
| 721 new_handles->set_pop_frame_link(old_handles); | |
| 722 thread->set_active_handles(new_handles); | |
| 723 jint ret = JNI_OK; | |
| 724 DTRACE_PROBE1(hotspot_jni, PushLocalFrame__return, ret); | |
| 725 return ret; | |
| 726 JNI_END | |
| 727 | |
| 728 | |
| 729 JNI_ENTRY(jobject, jni_PopLocalFrame(JNIEnv *env, jobject result)) | |
| 730 JNIWrapper("PopLocalFrame"); | |
| 731 DTRACE_PROBE2(hotspot_jni, PopLocalFrame__entry, env, result); | |
| 732 //%note jni_11 | |
| 733 Handle result_handle(thread, JNIHandles::resolve(result)); | |
| 734 JNIHandleBlock* old_handles = thread->active_handles(); | |
| 735 JNIHandleBlock* new_handles = old_handles->pop_frame_link(); | |
| 736 if (new_handles != NULL) { | |
| 737 // As a sanity check we only release the handle blocks if the pop_frame_link is not NULL. | |
| 738 // This way code will still work if PopLocalFrame is called without a corresponding | |
| 739 // PushLocalFrame call. Note that we set the pop_frame_link to NULL explicitly, otherwise | |
| 740 // the release_block call will release the blocks. | |
| 741 thread->set_active_handles(new_handles); | |
| 742 old_handles->set_pop_frame_link(NULL); // clear link we won't release new_handles below | |
| 743 JNIHandleBlock::release_block(old_handles, thread); // may block | |
| 744 result = JNIHandles::make_local(thread, result_handle()); | |
| 745 } | |
| 746 DTRACE_PROBE1(hotspot_jni, PopLocalFrame__return, result); | |
| 747 return result; | |
| 748 JNI_END | |
| 749 | |
| 750 | |
| 751 JNI_ENTRY(jobject, jni_NewGlobalRef(JNIEnv *env, jobject ref)) | |
| 752 JNIWrapper("NewGlobalRef"); | |
| 753 DTRACE_PROBE2(hotspot_jni, NewGlobalRef__entry, env, ref); | |
| 754 Handle ref_handle(thread, JNIHandles::resolve(ref)); | |
| 755 jobject ret = JNIHandles::make_global(ref_handle); | |
| 756 DTRACE_PROBE1(hotspot_jni, NewGlobalRef__return, ret); | |
| 757 return ret; | |
| 758 JNI_END | |
| 759 | |
| 760 // Must be JNI_ENTRY (with HandleMark) | |
| 761 JNI_ENTRY_NO_PRESERVE(void, jni_DeleteGlobalRef(JNIEnv *env, jobject ref)) | |
| 762 JNIWrapper("DeleteGlobalRef"); | |
| 763 DTRACE_PROBE2(hotspot_jni, DeleteGlobalRef__entry, env, ref); | |
| 764 JNIHandles::destroy_global(ref); | |
| 765 DTRACE_PROBE(hotspot_jni, DeleteGlobalRef__return); | |
| 766 JNI_END | |
| 767 | |
| 768 JNI_QUICK_ENTRY(void, jni_DeleteLocalRef(JNIEnv *env, jobject obj)) | |
| 769 JNIWrapper("DeleteLocalRef"); | |
| 770 DTRACE_PROBE2(hotspot_jni, DeleteLocalRef__entry, env, obj); | |
| 771 JNIHandles::destroy_local(obj); | |
| 772 DTRACE_PROBE(hotspot_jni, DeleteLocalRef__return); | |
| 773 JNI_END | |
| 774 | |
| 775 JNI_QUICK_ENTRY(jboolean, jni_IsSameObject(JNIEnv *env, jobject r1, jobject r2)) | |
| 776 JNIWrapper("IsSameObject"); | |
| 777 DTRACE_PROBE3(hotspot_jni, IsSameObject__entry, env, r1, r2); | |
| 778 oop a = JNIHandles::resolve(r1); | |
| 779 oop b = JNIHandles::resolve(r2); | |
| 780 jboolean ret = (a == b) ? JNI_TRUE : JNI_FALSE; | |
| 781 DTRACE_PROBE1(hotspot_jni, IsSameObject__return, ret); | |
| 782 return ret; | |
| 783 JNI_END | |
| 784 | |
| 785 | |
| 786 JNI_ENTRY(jobject, jni_NewLocalRef(JNIEnv *env, jobject ref)) | |
| 787 JNIWrapper("NewLocalRef"); | |
| 788 DTRACE_PROBE2(hotspot_jni, NewLocalRef__entry, env, ref); | |
| 789 jobject ret = JNIHandles::make_local(env, JNIHandles::resolve(ref)); | |
| 790 DTRACE_PROBE1(hotspot_jni, NewLocalRef__return, ret); | |
| 791 return ret; | |
| 792 JNI_END | |
| 793 | |
| 794 JNI_LEAF(jint, jni_EnsureLocalCapacity(JNIEnv *env, jint capacity)) | |
| 795 JNIWrapper("EnsureLocalCapacity"); | |
| 796 DTRACE_PROBE2(hotspot_jni, EnsureLocalCapacity__entry, env, capacity); | |
| 797 jint ret; | |
| 798 if (capacity >= 0 && capacity <= MAX_REASONABLE_LOCAL_CAPACITY) { | |
| 799 ret = JNI_OK; | |
| 800 } else { | |
| 801 ret = JNI_ERR; | |
| 802 } | |
| 803 DTRACE_PROBE1(hotspot_jni, EnsureLocalCapacity__return, ret); | |
| 804 return ret; | |
| 805 JNI_END | |
| 806 | |
| 807 // Return the Handle Type | |
| 808 JNI_LEAF(jobjectRefType, jni_GetObjectRefType(JNIEnv *env, jobject obj)) | |
| 809 JNIWrapper("GetObjectRefType"); | |
| 810 DTRACE_PROBE2(hotspot_jni, GetObjectRefType__entry, env, obj); | |
| 811 jobjectRefType ret; | |
| 812 if (JNIHandles::is_local_handle(thread, obj) || | |
| 813 JNIHandles::is_frame_handle(thread, obj)) | |
| 814 ret = JNILocalRefType; | |
| 815 else if (JNIHandles::is_global_handle(obj)) | |
| 816 ret = JNIGlobalRefType; | |
| 817 else if (JNIHandles::is_weak_global_handle(obj)) | |
| 818 ret = JNIWeakGlobalRefType; | |
| 819 else | |
| 820 ret = JNIInvalidRefType; | |
| 821 DTRACE_PROBE1(hotspot_jni, GetObjectRefType__return, ret); | |
| 822 return ret; | |
| 823 JNI_END | |
| 824 | |
| 825 | |
| 826 class JNI_ArgumentPusher : public SignatureIterator { | |
| 827 protected: | |
| 828 JavaCallArguments* _arguments; | |
| 829 | |
| 830 virtual void get_bool () = 0; | |
| 831 virtual void get_char () = 0; | |
| 832 virtual void get_short () = 0; | |
| 833 virtual void get_byte () = 0; | |
| 834 virtual void get_int () = 0; | |
| 835 virtual void get_long () = 0; | |
| 836 virtual void get_float () = 0; | |
| 837 virtual void get_double () = 0; | |
| 838 virtual void get_object () = 0; | |
| 839 | |
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840 JNI_ArgumentPusher(Symbol* signature) : SignatureIterator(signature) { |
| 0 | 841 this->_return_type = T_ILLEGAL; |
| 842 _arguments = NULL; | |
| 843 } | |
| 844 | |
| 845 public: | |
| 846 virtual void iterate( uint64_t fingerprint ) = 0; | |
| 847 | |
| 848 void set_java_argument_object(JavaCallArguments *arguments) { _arguments = arguments; } | |
| 849 | |
| 850 inline void do_bool() { if (!is_return_type()) get_bool(); } | |
| 851 inline void do_char() { if (!is_return_type()) get_char(); } | |
| 852 inline void do_short() { if (!is_return_type()) get_short(); } | |
| 853 inline void do_byte() { if (!is_return_type()) get_byte(); } | |
| 854 inline void do_int() { if (!is_return_type()) get_int(); } | |
| 855 inline void do_long() { if (!is_return_type()) get_long(); } | |
| 856 inline void do_float() { if (!is_return_type()) get_float(); } | |
| 857 inline void do_double() { if (!is_return_type()) get_double(); } | |
| 858 inline void do_object(int begin, int end) { if (!is_return_type()) get_object(); } | |
| 859 inline void do_array(int begin, int end) { if (!is_return_type()) get_object(); } // do_array uses get_object -- there is no get_array | |
| 860 inline void do_void() { } | |
| 861 | |
| 862 JavaCallArguments* arguments() { return _arguments; } | |
| 863 void push_receiver(Handle h) { _arguments->push_oop(h); } | |
| 864 }; | |
| 865 | |
| 866 | |
| 867 class JNI_ArgumentPusherVaArg : public JNI_ArgumentPusher { | |
| 868 protected: | |
| 869 va_list _ap; | |
| 870 | |
| 871 inline void get_bool() { _arguments->push_int(va_arg(_ap, jint)); } // bool is coerced to int when using va_arg | |
| 872 inline void get_char() { _arguments->push_int(va_arg(_ap, jint)); } // char is coerced to int when using va_arg | |
| 873 inline void get_short() { _arguments->push_int(va_arg(_ap, jint)); } // short is coerced to int when using va_arg | |
| 874 inline void get_byte() { _arguments->push_int(va_arg(_ap, jint)); } // byte is coerced to int when using va_arg | |
| 875 inline void get_int() { _arguments->push_int(va_arg(_ap, jint)); } | |
| 876 | |
| 877 // each of these paths is exercized by the various jck Call[Static,Nonvirtual,][Void,Int,..]Method[A,V,] tests | |
| 878 | |
| 879 inline void get_long() { _arguments->push_long(va_arg(_ap, jlong)); } | |
| 880 inline void get_float() { _arguments->push_float((jfloat)va_arg(_ap, jdouble)); } // float is coerced to double w/ va_arg | |
| 881 inline void get_double() { _arguments->push_double(va_arg(_ap, jdouble)); } | |
| 882 inline void get_object() { jobject l = va_arg(_ap, jobject); | |
| 883 _arguments->push_oop(Handle((oop *)l, false)); } | |
| 884 | |
| 885 inline void set_ap(va_list rap) { | |
| 886 #ifdef va_copy | |
| 887 va_copy(_ap, rap); | |
| 888 #elif defined (__va_copy) | |
| 889 __va_copy(_ap, rap); | |
| 890 #else | |
| 891 _ap = rap; | |
| 892 #endif | |
| 893 } | |
| 894 | |
| 895 public: | |
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896 JNI_ArgumentPusherVaArg(Symbol* signature, va_list rap) |
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897 : JNI_ArgumentPusher(signature) { |
| 0 | 898 set_ap(rap); |
| 899 } | |
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900 JNI_ArgumentPusherVaArg(jmethodID method_id, va_list rap) |
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901 : JNI_ArgumentPusher(JNIHandles::resolve_jmethod_id(method_id)->signature()) { |
| 0 | 902 set_ap(rap); |
| 903 } | |
| 904 | |
| 905 // Optimized path if we have the bitvector form of signature | |
| 906 void iterate( uint64_t fingerprint ) { | |
| 907 if ( fingerprint == UCONST64(-1) ) SignatureIterator::iterate();// Must be too many arguments | |
| 908 else { | |
| 909 _return_type = (BasicType)((fingerprint >> static_feature_size) & | |
| 910 result_feature_mask); | |
| 911 | |
| 912 assert(fingerprint, "Fingerprint should not be 0"); | |
| 913 fingerprint = fingerprint >> (static_feature_size + result_feature_size); | |
| 914 while ( 1 ) { | |
| 915 switch ( fingerprint & parameter_feature_mask ) { | |
| 916 case bool_parm: | |
| 917 case char_parm: | |
| 918 case short_parm: | |
| 919 case byte_parm: | |
| 920 case int_parm: | |
| 921 get_int(); | |
| 922 break; | |
| 923 case obj_parm: | |
| 924 get_object(); | |
| 925 break; | |
| 926 case long_parm: | |
| 927 get_long(); | |
| 928 break; | |
| 929 case float_parm: | |
| 930 get_float(); | |
| 931 break; | |
| 932 case double_parm: | |
| 933 get_double(); | |
| 934 break; | |
| 935 case done_parm: | |
| 936 return; | |
| 937 break; | |
| 938 default: | |
| 939 ShouldNotReachHere(); | |
| 940 break; | |
| 941 } | |
| 942 fingerprint >>= parameter_feature_size; | |
| 943 } | |
| 944 } | |
| 945 } | |
| 946 }; | |
| 947 | |
| 948 | |
| 949 class JNI_ArgumentPusherArray : public JNI_ArgumentPusher { | |
| 950 protected: | |
| 951 const jvalue *_ap; | |
| 952 | |
| 953 inline void get_bool() { _arguments->push_int((jint)(_ap++)->z); } | |
| 954 inline void get_char() { _arguments->push_int((jint)(_ap++)->c); } | |
| 955 inline void get_short() { _arguments->push_int((jint)(_ap++)->s); } | |
| 956 inline void get_byte() { _arguments->push_int((jint)(_ap++)->b); } | |
| 957 inline void get_int() { _arguments->push_int((jint)(_ap++)->i); } | |
| 958 | |
| 959 inline void get_long() { _arguments->push_long((_ap++)->j); } | |
| 960 inline void get_float() { _arguments->push_float((_ap++)->f); } | |
| 961 inline void get_double() { _arguments->push_double((_ap++)->d);} | |
| 962 inline void get_object() { _arguments->push_oop(Handle((oop *)(_ap++)->l, false)); } | |
| 963 | |
| 964 inline void set_ap(const jvalue *rap) { _ap = rap; } | |
| 965 | |
| 966 public: | |
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967 JNI_ArgumentPusherArray(Symbol* signature, const jvalue *rap) |
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968 : JNI_ArgumentPusher(signature) { |
| 0 | 969 set_ap(rap); |
| 970 } | |
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971 JNI_ArgumentPusherArray(jmethodID method_id, const jvalue *rap) |
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972 : JNI_ArgumentPusher(JNIHandles::resolve_jmethod_id(method_id)->signature()) { |
| 0 | 973 set_ap(rap); |
| 974 } | |
| 975 | |
| 976 // Optimized path if we have the bitvector form of signature | |
| 977 void iterate( uint64_t fingerprint ) { | |
| 978 if ( fingerprint == UCONST64(-1) ) SignatureIterator::iterate(); // Must be too many arguments | |
| 979 else { | |
| 980 _return_type = (BasicType)((fingerprint >> static_feature_size) & | |
| 981 result_feature_mask); | |
| 982 assert(fingerprint, "Fingerprint should not be 0"); | |
| 983 fingerprint = fingerprint >> (static_feature_size + result_feature_size); | |
| 984 while ( 1 ) { | |
| 985 switch ( fingerprint & parameter_feature_mask ) { | |
| 986 case bool_parm: | |
| 987 get_bool(); | |
| 988 break; | |
| 989 case char_parm: | |
| 990 get_char(); | |
| 991 break; | |
| 992 case short_parm: | |
| 993 get_short(); | |
| 994 break; | |
| 995 case byte_parm: | |
| 996 get_byte(); | |
| 997 break; | |
| 998 case int_parm: | |
| 999 get_int(); | |
| 1000 break; | |
| 1001 case obj_parm: | |
| 1002 get_object(); | |
| 1003 break; | |
| 1004 case long_parm: | |
| 1005 get_long(); | |
| 1006 break; | |
| 1007 case float_parm: | |
| 1008 get_float(); | |
| 1009 break; | |
| 1010 case double_parm: | |
| 1011 get_double(); | |
| 1012 break; | |
| 1013 case done_parm: | |
| 1014 return; | |
| 1015 break; | |
| 1016 default: | |
| 1017 ShouldNotReachHere(); | |
| 1018 break; | |
| 1019 } | |
| 1020 fingerprint >>= parameter_feature_size; | |
| 1021 } | |
| 1022 } | |
| 1023 } | |
| 1024 }; | |
| 1025 | |
| 1026 | |
| 1027 enum JNICallType { | |
| 1028 JNI_STATIC, | |
| 1029 JNI_VIRTUAL, | |
| 1030 JNI_NONVIRTUAL | |
| 1031 }; | |
| 1032 | |
| 1033 static methodHandle jni_resolve_interface_call(Handle recv, methodHandle method, TRAPS) { | |
| 1034 assert(!method.is_null() , "method should not be null"); | |
| 1035 | |
| 1036 KlassHandle recv_klass; // Default to NULL (use of ?: can confuse gcc) | |
| 1037 if (recv.not_null()) recv_klass = KlassHandle(THREAD, recv->klass()); | |
| 1038 KlassHandle spec_klass (THREAD, method->method_holder()); | |
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1039 Symbol* name = method->name(); |
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1040 Symbol* signature = method->signature(); |
| 0 | 1041 CallInfo info; |
| 1042 LinkResolver::resolve_interface_call(info, recv, recv_klass, spec_klass, name, signature, KlassHandle(), false, true, CHECK_(methodHandle())); | |
| 1043 return info.selected_method(); | |
| 1044 } | |
| 1045 | |
| 1046 static methodHandle jni_resolve_virtual_call(Handle recv, methodHandle method, TRAPS) { | |
| 1047 assert(!method.is_null() , "method should not be null"); | |
| 1048 | |
| 1049 KlassHandle recv_klass; // Default to NULL (use of ?: can confuse gcc) | |
| 1050 if (recv.not_null()) recv_klass = KlassHandle(THREAD, recv->klass()); | |
| 1051 KlassHandle spec_klass (THREAD, method->method_holder()); | |
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1052 Symbol* name = method->name(); |
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1053 Symbol* signature = method->signature(); |
| 0 | 1054 CallInfo info; |
| 1055 LinkResolver::resolve_virtual_call(info, recv, recv_klass, spec_klass, name, signature, KlassHandle(), false, true, CHECK_(methodHandle())); | |
| 1056 return info.selected_method(); | |
| 1057 } | |
| 1058 | |
| 1059 | |
| 1060 | |
| 1061 static void jni_invoke_static(JNIEnv *env, JavaValue* result, jobject receiver, JNICallType call_type, jmethodID method_id, JNI_ArgumentPusher *args, TRAPS) { | |
| 1062 methodHandle method(THREAD, JNIHandles::resolve_jmethod_id(method_id)); | |
| 1063 | |
| 1064 // Create object to hold arguments for the JavaCall, and associate it with | |
| 1065 // the jni parser | |
| 1066 ResourceMark rm(THREAD); | |
| 1067 int number_of_parameters = method->size_of_parameters(); | |
| 1068 JavaCallArguments java_args(number_of_parameters); | |
| 1069 args->set_java_argument_object(&java_args); | |
| 1070 | |
| 1071 assert(method->is_static(), "method should be static"); | |
| 1072 | |
| 1073 // Fill out JavaCallArguments object | |
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1074 args->iterate( Fingerprinter(method).fingerprint() ); |
| 0 | 1075 // Initialize result type |
| 1076 result->set_type(args->get_ret_type()); | |
| 1077 | |
| 1078 // Invoke the method. Result is returned as oop. | |
| 1079 JavaCalls::call(result, method, &java_args, CHECK); | |
| 1080 | |
| 1081 // Convert result | |
| 1082 if (result->get_type() == T_OBJECT || result->get_type() == T_ARRAY) { | |
| 1083 result->set_jobject(JNIHandles::make_local(env, (oop) result->get_jobject())); | |
| 1084 } | |
| 1085 } | |
| 1086 | |
| 1087 | |
| 1088 static void jni_invoke_nonstatic(JNIEnv *env, JavaValue* result, jobject receiver, JNICallType call_type, jmethodID method_id, JNI_ArgumentPusher *args, TRAPS) { | |
| 1089 oop recv = JNIHandles::resolve(receiver); | |
| 1090 if (recv == NULL) { | |
| 1091 THROW(vmSymbols::java_lang_NullPointerException()); | |
| 1092 } | |
| 1093 Handle h_recv(THREAD, recv); | |
| 1094 | |
| 1095 int number_of_parameters; | |
| 1096 methodOop selected_method; | |
| 1097 { | |
| 1098 methodOop m = JNIHandles::resolve_jmethod_id(method_id); | |
| 1099 number_of_parameters = m->size_of_parameters(); | |
| 1100 klassOop holder = m->method_holder(); | |
| 1101 if (!(Klass::cast(holder))->is_interface()) { | |
| 1102 // non-interface call -- for that little speed boost, don't handlize | |
| 1103 debug_only(No_Safepoint_Verifier nosafepoint;) | |
| 1104 if (call_type == JNI_VIRTUAL) { | |
| 1105 // jni_GetMethodID makes sure class is linked and initialized | |
| 1106 // so m should have a valid vtable index. | |
| 1107 int vtbl_index = m->vtable_index(); | |
| 1108 if (vtbl_index != methodOopDesc::nonvirtual_vtable_index) { | |
| 1109 klassOop k = h_recv->klass(); | |
| 1110 // k might be an arrayKlassOop but all vtables start at | |
| 1111 // the same place. The cast is to avoid virtual call and assertion. | |
| 1112 instanceKlass *ik = (instanceKlass*)k->klass_part(); | |
| 1113 selected_method = ik->method_at_vtable(vtbl_index); | |
| 1114 } else { | |
| 1115 // final method | |
| 1116 selected_method = m; | |
| 1117 } | |
| 1118 } else { | |
| 1119 // JNI_NONVIRTUAL call | |
| 1120 selected_method = m; | |
| 1121 } | |
| 1122 } else { | |
| 1123 // interface call | |
| 1124 KlassHandle h_holder(THREAD, holder); | |
| 1125 | |
| 1126 int itbl_index = m->cached_itable_index(); | |
| 1127 if (itbl_index == -1) { | |
| 1128 itbl_index = klassItable::compute_itable_index(m); | |
| 1129 m->set_cached_itable_index(itbl_index); | |
| 1130 // the above may have grabbed a lock, 'm' and anything non-handlized can't be used again | |
| 1131 } | |
| 1132 klassOop k = h_recv->klass(); | |
| 1133 selected_method = instanceKlass::cast(k)->method_at_itable(h_holder(), itbl_index, CHECK); | |
| 1134 } | |
| 1135 } | |
| 1136 | |
| 1137 methodHandle method(THREAD, selected_method); | |
| 1138 | |
| 1139 // Create object to hold arguments for the JavaCall, and associate it with | |
| 1140 // the jni parser | |
| 1141 ResourceMark rm(THREAD); | |
| 1142 JavaCallArguments java_args(number_of_parameters); | |
| 1143 args->set_java_argument_object(&java_args); | |
| 1144 | |
| 1145 // handle arguments | |
| 1146 assert(!method->is_static(), "method should not be static"); | |
| 1147 args->push_receiver(h_recv); // Push jobject handle | |
| 1148 | |
| 1149 // Fill out JavaCallArguments object | |
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1150 args->iterate( Fingerprinter(method).fingerprint() ); |
| 0 | 1151 // Initialize result type |
| 1152 result->set_type(args->get_ret_type()); | |
| 1153 | |
| 1154 // Invoke the method. Result is returned as oop. | |
| 1155 JavaCalls::call(result, method, &java_args, CHECK); | |
| 1156 | |
| 1157 // Convert result | |
| 1158 if (result->get_type() == T_OBJECT || result->get_type() == T_ARRAY) { | |
| 1159 result->set_jobject(JNIHandles::make_local(env, (oop) result->get_jobject())); | |
| 1160 } | |
| 1161 } | |
| 1162 | |
| 1163 | |
| 1164 static instanceOop alloc_object(jclass clazz, TRAPS) { | |
| 1165 KlassHandle k(THREAD, java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(clazz))); | |
| 1166 Klass::cast(k())->check_valid_for_instantiation(false, CHECK_NULL); | |
| 1167 instanceKlass::cast(k())->initialize(CHECK_NULL); | |
| 1168 instanceOop ih = instanceKlass::cast(k())->allocate_instance(THREAD); | |
| 1169 return ih; | |
| 1170 } | |
| 1171 | |
| 1172 DT_RETURN_MARK_DECL(AllocObject, jobject); | |
| 1173 | |
| 1174 JNI_ENTRY(jobject, jni_AllocObject(JNIEnv *env, jclass clazz)) | |
| 1175 JNIWrapper("AllocObject"); | |
| 1176 | |
| 1177 DTRACE_PROBE2(hotspot_jni, AllocObject__entry, env, clazz); | |
| 1178 jobject ret = NULL; | |
| 1179 DT_RETURN_MARK(AllocObject, jobject, (const jobject&)ret); | |
| 1180 | |
| 1181 instanceOop i = alloc_object(clazz, CHECK_NULL); | |
| 1182 ret = JNIHandles::make_local(env, i); | |
| 1183 return ret; | |
| 1184 JNI_END | |
| 1185 | |
| 1186 DT_RETURN_MARK_DECL(NewObjectA, jobject); | |
| 1187 | |
| 1188 JNI_ENTRY(jobject, jni_NewObjectA(JNIEnv *env, jclass clazz, jmethodID methodID, const jvalue *args)) | |
| 1189 JNIWrapper("NewObjectA"); | |
| 1190 DTRACE_PROBE3(hotspot_jni, NewObjectA__entry, env, clazz, methodID); | |
| 1191 jobject obj = NULL; | |
| 1192 DT_RETURN_MARK(NewObjectA, jobject, (const jobject)obj); | |
| 1193 | |
| 1194 instanceOop i = alloc_object(clazz, CHECK_NULL); | |
| 1195 obj = JNIHandles::make_local(env, i); | |
| 1196 JavaValue jvalue(T_VOID); | |
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1197 JNI_ArgumentPusherArray ap(methodID, args); |
| 0 | 1198 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_NULL); |
| 1199 return obj; | |
| 1200 JNI_END | |
| 1201 | |
| 1202 DT_RETURN_MARK_DECL(NewObjectV, jobject); | |
| 1203 | |
| 1204 JNI_ENTRY(jobject, jni_NewObjectV(JNIEnv *env, jclass clazz, jmethodID methodID, va_list args)) | |
| 1205 JNIWrapper("NewObjectV"); | |
| 1206 DTRACE_PROBE3(hotspot_jni, NewObjectV__entry, env, clazz, methodID); | |
| 1207 jobject obj = NULL; | |
| 1208 DT_RETURN_MARK(NewObjectV, jobject, (const jobject&)obj); | |
| 1209 | |
| 1210 instanceOop i = alloc_object(clazz, CHECK_NULL); | |
| 1211 obj = JNIHandles::make_local(env, i); | |
| 1212 JavaValue jvalue(T_VOID); | |
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1213 JNI_ArgumentPusherVaArg ap(methodID, args); |
| 0 | 1214 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_NULL); |
| 1215 return obj; | |
| 1216 JNI_END | |
| 1217 | |
| 1218 DT_RETURN_MARK_DECL(NewObject, jobject); | |
| 1219 | |
| 1220 JNI_ENTRY(jobject, jni_NewObject(JNIEnv *env, jclass clazz, jmethodID methodID, ...)) | |
| 1221 JNIWrapper("NewObject"); | |
| 1222 DTRACE_PROBE3(hotspot_jni, NewObject__entry, env, clazz, methodID); | |
| 1223 jobject obj = NULL; | |
| 1224 DT_RETURN_MARK(NewObject, jobject, (const jobject&)obj); | |
| 1225 | |
| 1226 instanceOop i = alloc_object(clazz, CHECK_NULL); | |
| 1227 obj = JNIHandles::make_local(env, i); | |
| 1228 va_list args; | |
| 1229 va_start(args, methodID); | |
| 1230 JavaValue jvalue(T_VOID); | |
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1231 JNI_ArgumentPusherVaArg ap(methodID, args); |
| 0 | 1232 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_NULL); |
| 1233 va_end(args); | |
| 1234 return obj; | |
| 1235 JNI_END | |
| 1236 | |
| 1237 | |
| 1238 JNI_ENTRY(jclass, jni_GetObjectClass(JNIEnv *env, jobject obj)) | |
| 1239 JNIWrapper("GetObjectClass"); | |
| 1240 DTRACE_PROBE2(hotspot_jni, GetObjectClass__entry, env, obj); | |
| 1241 klassOop k = JNIHandles::resolve_non_null(obj)->klass(); | |
| 1242 jclass ret = | |
| 1243 (jclass) JNIHandles::make_local(env, Klass::cast(k)->java_mirror()); | |
| 1244 DTRACE_PROBE1(hotspot_jni, GetObjectClass__return, ret); | |
| 1245 return ret; | |
| 1246 JNI_END | |
| 1247 | |
| 1248 JNI_QUICK_ENTRY(jboolean, jni_IsInstanceOf(JNIEnv *env, jobject obj, jclass clazz)) | |
| 1249 JNIWrapper("IsInstanceOf"); | |
| 1250 DTRACE_PROBE3(hotspot_jni, IsInstanceOf__entry, env, obj, clazz); | |
| 1251 jboolean ret = JNI_TRUE; | |
| 1252 if (obj != NULL) { | |
| 1253 ret = JNI_FALSE; | |
| 1254 klassOop k = java_lang_Class::as_klassOop( | |
| 1255 JNIHandles::resolve_non_null(clazz)); | |
| 1256 if (k != NULL) { | |
| 1257 ret = JNIHandles::resolve_non_null(obj)->is_a(k) ? JNI_TRUE : JNI_FALSE; | |
| 1258 } | |
| 1259 } | |
| 1260 DTRACE_PROBE1(hotspot_jni, IsInstanceOf__return, ret); | |
| 1261 return ret; | |
| 1262 JNI_END | |
| 1263 | |
| 1264 | |
| 1265 static jmethodID get_method_id(JNIEnv *env, jclass clazz, const char *name_str, | |
| 1266 const char *sig, bool is_static, TRAPS) { | |
| 1267 // %%%% This code should probably just call into a method in the LinkResolver | |
| 1268 // | |
| 1269 // The class should have been loaded (we have an instance of the class | |
| 1270 // passed in) so the method and signature should already be in the symbol | |
| 1271 // table. If they're not there, the method doesn't exist. | |
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1272 const char *name_to_probe = (name_str == NULL) |
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1273 ? vmSymbols::object_initializer_name()->as_C_string() |
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1274 : name_str; |
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1275 TempNewSymbol name = SymbolTable::probe(name_to_probe, (int)strlen(name_to_probe)); |
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1276 TempNewSymbol signature = SymbolTable::probe(sig, (int)strlen(sig)); |
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1277 |
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1278 if (name == NULL || signature == NULL) { |
| 0 | 1279 THROW_MSG_0(vmSymbols::java_lang_NoSuchMethodError(), name_str); |
| 1280 } | |
| 1281 | |
| 1282 // Throw a NoSuchMethodError exception if we have an instance of a | |
| 1283 // primitive java.lang.Class | |
| 1284 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(clazz))) { | |
| 1285 THROW_MSG_0(vmSymbols::java_lang_NoSuchMethodError(), name_str); | |
| 1286 } | |
| 1287 | |
| 1288 KlassHandle klass(THREAD, | |
| 1289 java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(clazz))); | |
| 1290 | |
| 1291 // Make sure class is linked and initialized before handing id's out to | |
| 1292 // methodOops. | |
| 1293 Klass::cast(klass())->initialize(CHECK_NULL); | |
| 1294 | |
| 1295 methodOop m; | |
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1296 if (name == vmSymbols::object_initializer_name() || |
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1297 name == vmSymbols::class_initializer_name()) { |
| 0 | 1298 // Never search superclasses for constructors |
| 1299 if (klass->oop_is_instance()) { | |
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1300 m = instanceKlass::cast(klass())->find_method(name, signature); |
| 0 | 1301 } else { |
| 1302 m = NULL; | |
| 1303 } | |
| 1304 } else { | |
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1305 m = klass->lookup_method(name, signature); |
| 0 | 1306 // Look up interfaces |
| 1307 if (m == NULL && klass->oop_is_instance()) { | |
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1308 m = instanceKlass::cast(klass())->lookup_method_in_all_interfaces(name, |
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1309 signature); |
| 0 | 1310 } |
| 1311 } | |
| 1312 if (m == NULL || (m->is_static() != is_static)) { | |
| 1313 THROW_MSG_0(vmSymbols::java_lang_NoSuchMethodError(), name_str); | |
| 1314 } | |
| 1315 return m->jmethod_id(); | |
| 1316 } | |
| 1317 | |
| 1318 | |
| 1319 JNI_ENTRY(jmethodID, jni_GetMethodID(JNIEnv *env, jclass clazz, | |
| 1320 const char *name, const char *sig)) | |
| 1321 JNIWrapper("GetMethodID"); | |
| 1322 DTRACE_PROBE4(hotspot_jni, GetMethodID__entry, env, clazz, name, sig); | |
| 1323 jmethodID ret = get_method_id(env, clazz, name, sig, false, thread); | |
| 1324 DTRACE_PROBE1(hotspot_jni, GetMethodID__return, ret); | |
| 1325 return ret; | |
| 1326 JNI_END | |
| 1327 | |
| 1328 | |
| 1329 JNI_ENTRY(jmethodID, jni_GetStaticMethodID(JNIEnv *env, jclass clazz, | |
| 1330 const char *name, const char *sig)) | |
| 1331 JNIWrapper("GetStaticMethodID"); | |
| 1332 DTRACE_PROBE4(hotspot_jni, GetStaticMethodID__entry, env, clazz, name, sig); | |
| 1333 jmethodID ret = get_method_id(env, clazz, name, sig, true, thread); | |
| 1334 DTRACE_PROBE1(hotspot_jni, GetStaticMethodID__return, ret); | |
| 1335 return ret; | |
| 1336 JNI_END | |
| 1337 | |
| 1338 | |
| 1339 | |
| 1340 // | |
| 1341 // Calling Methods | |
| 1342 // | |
| 1343 | |
| 1344 | |
| 1345 #define DEFINE_CALLMETHOD(ResultType, Result, Tag) \ | |
| 1346 \ | |
| 1347 DT_RETURN_MARK_DECL_FOR(Result, Call##Result##Method, ResultType);\ | |
| 1348 DT_RETURN_MARK_DECL_FOR(Result, Call##Result##MethodV, ResultType);\ | |
| 1349 DT_RETURN_MARK_DECL_FOR(Result, Call##Result##MethodA, ResultType);\ | |
| 1350 \ | |
| 1351 JNI_ENTRY(ResultType, \ | |
| 1352 jni_Call##Result##Method(JNIEnv *env, jobject obj, jmethodID methodID, ...)) \ | |
| 1353 JNIWrapper("Call" XSTR(Result) "Method"); \ | |
| 1354 \ | |
| 1355 DTRACE_PROBE3(hotspot_jni, Call##Result##Method__entry, env, obj, methodID);\ | |
| 1356 ResultType ret = 0;\ | |
| 1357 DT_RETURN_MARK_FOR(Result, Call##Result##Method, ResultType, \ | |
| 1358 (const ResultType&)ret);\ | |
| 1359 \ | |
| 1360 va_list args; \ | |
| 1361 va_start(args, methodID); \ | |
| 1362 JavaValue jvalue(Tag); \ | |
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1363 JNI_ArgumentPusherVaArg ap(methodID, args); \ |
| 0 | 1364 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK_0); \ |
| 1365 va_end(args); \ | |
| 1366 ret = jvalue.get_##ResultType(); \ | |
| 1367 return ret;\ | |
| 1368 JNI_END \ | |
| 1369 \ | |
| 1370 \ | |
| 1371 JNI_ENTRY(ResultType, \ | |
| 1372 jni_Call##Result##MethodV(JNIEnv *env, jobject obj, jmethodID methodID, va_list args)) \ | |
| 1373 JNIWrapper("Call" XSTR(Result) "MethodV"); \ | |
| 1374 \ | |
| 1375 DTRACE_PROBE3(hotspot_jni, Call##Result##MethodV__entry, env, obj, methodID);\ | |
| 1376 ResultType ret = 0;\ | |
| 1377 DT_RETURN_MARK_FOR(Result, Call##Result##MethodV, ResultType, \ | |
| 1378 (const ResultType&)ret);\ | |
| 1379 \ | |
| 1380 JavaValue jvalue(Tag); \ | |
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1381 JNI_ArgumentPusherVaArg ap(methodID, args); \ |
| 0 | 1382 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK_0); \ |
| 1383 ret = jvalue.get_##ResultType(); \ | |
| 1384 return ret;\ | |
| 1385 JNI_END \ | |
| 1386 \ | |
| 1387 \ | |
| 1388 JNI_ENTRY(ResultType, \ | |
| 1389 jni_Call##Result##MethodA(JNIEnv *env, jobject obj, jmethodID methodID, const jvalue *args)) \ | |
| 1390 JNIWrapper("Call" XSTR(Result) "MethodA"); \ | |
| 1391 DTRACE_PROBE3(hotspot_jni, Call##Result##MethodA__entry, env, obj, methodID);\ | |
| 1392 ResultType ret = 0;\ | |
| 1393 DT_RETURN_MARK_FOR(Result, Call##Result##MethodA, ResultType, \ | |
| 1394 (const ResultType&)ret);\ | |
| 1395 \ | |
| 1396 JavaValue jvalue(Tag); \ | |
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1397 JNI_ArgumentPusherArray ap(methodID, args); \ |
| 0 | 1398 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK_0); \ |
| 1399 ret = jvalue.get_##ResultType(); \ | |
| 1400 return ret;\ | |
| 1401 JNI_END | |
| 1402 | |
| 1403 // the runtime type of subword integral basic types is integer | |
| 1404 DEFINE_CALLMETHOD(jboolean, Boolean, T_BOOLEAN) | |
| 1405 DEFINE_CALLMETHOD(jbyte, Byte, T_BYTE) | |
| 1406 DEFINE_CALLMETHOD(jchar, Char, T_CHAR) | |
| 1407 DEFINE_CALLMETHOD(jshort, Short, T_SHORT) | |
| 1408 | |
| 1409 DEFINE_CALLMETHOD(jobject, Object, T_OBJECT) | |
| 1410 DEFINE_CALLMETHOD(jint, Int, T_INT) | |
| 1411 DEFINE_CALLMETHOD(jlong, Long, T_LONG) | |
| 1412 DEFINE_CALLMETHOD(jfloat, Float, T_FLOAT) | |
| 1413 DEFINE_CALLMETHOD(jdouble, Double, T_DOUBLE) | |
| 1414 | |
| 1415 DT_VOID_RETURN_MARK_DECL(CallVoidMethod); | |
| 1416 DT_VOID_RETURN_MARK_DECL(CallVoidMethodV); | |
| 1417 DT_VOID_RETURN_MARK_DECL(CallVoidMethodA); | |
| 1418 | |
| 1419 JNI_ENTRY(void, jni_CallVoidMethod(JNIEnv *env, jobject obj, jmethodID methodID, ...)) | |
| 1420 JNIWrapper("CallVoidMethod"); | |
| 1421 DTRACE_PROBE3(hotspot_jni, CallVoidMethod__entry, env, obj, methodID); | |
| 1422 DT_VOID_RETURN_MARK(CallVoidMethod); | |
| 1423 | |
| 1424 va_list args; | |
| 1425 va_start(args, methodID); | |
| 1426 JavaValue jvalue(T_VOID); | |
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1427 JNI_ArgumentPusherVaArg ap(methodID, args); |
| 0 | 1428 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK); |
| 1429 va_end(args); | |
| 1430 JNI_END | |
| 1431 | |
| 1432 | |
| 1433 JNI_ENTRY(void, jni_CallVoidMethodV(JNIEnv *env, jobject obj, jmethodID methodID, va_list args)) | |
| 1434 JNIWrapper("CallVoidMethodV"); | |
| 1435 DTRACE_PROBE3(hotspot_jni, CallVoidMethodV__entry, env, obj, methodID); | |
| 1436 DT_VOID_RETURN_MARK(CallVoidMethodV); | |
| 1437 | |
| 1438 JavaValue jvalue(T_VOID); | |
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1439 JNI_ArgumentPusherVaArg ap(methodID, args); |
| 0 | 1440 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK); |
| 1441 JNI_END | |
| 1442 | |
| 1443 | |
| 1444 JNI_ENTRY(void, jni_CallVoidMethodA(JNIEnv *env, jobject obj, jmethodID methodID, const jvalue *args)) | |
| 1445 JNIWrapper("CallVoidMethodA"); | |
| 1446 DTRACE_PROBE3(hotspot_jni, CallVoidMethodA__entry, env, obj, methodID); | |
| 1447 DT_VOID_RETURN_MARK(CallVoidMethodA); | |
| 1448 | |
| 1449 JavaValue jvalue(T_VOID); | |
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1450 JNI_ArgumentPusherArray ap(methodID, args); |
| 0 | 1451 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK); |
| 1452 JNI_END | |
| 1453 | |
| 1454 | |
| 1455 #define DEFINE_CALLNONVIRTUALMETHOD(ResultType, Result, Tag) \ | |
| 1456 \ | |
| 1457 DT_RETURN_MARK_DECL_FOR(Result, CallNonvirtual##Result##Method, ResultType);\ | |
| 1458 DT_RETURN_MARK_DECL_FOR(Result, CallNonvirtual##Result##MethodV, ResultType);\ | |
| 1459 DT_RETURN_MARK_DECL_FOR(Result, CallNonvirtual##Result##MethodA, ResultType);\ | |
| 1460 \ | |
| 1461 JNI_ENTRY(ResultType, \ | |
| 1462 jni_CallNonvirtual##Result##Method(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, ...)) \ | |
| 1463 JNIWrapper("CallNonvitual" XSTR(Result) "Method"); \ | |
| 1464 \ | |
| 1465 DTRACE_PROBE4(hotspot_jni, CallNonvirtual##Result##Method__entry, env, obj, cls, methodID);\ | |
| 1466 ResultType ret;\ | |
| 1467 DT_RETURN_MARK_FOR(Result, CallNonvirtual##Result##Method, ResultType, \ | |
| 1468 (const ResultType&)ret);\ | |
| 1469 \ | |
| 1470 va_list args; \ | |
| 1471 va_start(args, methodID); \ | |
| 1472 JavaValue jvalue(Tag); \ | |
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1473 JNI_ArgumentPusherVaArg ap(methodID, args); \ |
| 0 | 1474 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_0); \ |
| 1475 va_end(args); \ | |
| 1476 ret = jvalue.get_##ResultType(); \ | |
| 1477 return ret;\ | |
| 1478 JNI_END \ | |
| 1479 \ | |
| 1480 JNI_ENTRY(ResultType, \ | |
| 1481 jni_CallNonvirtual##Result##MethodV(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, va_list args)) \ | |
| 1482 JNIWrapper("CallNonvitual" XSTR(Result) "#MethodV"); \ | |
| 1483 DTRACE_PROBE4(hotspot_jni, CallNonvirtual##Result##MethodV__entry, env, obj, cls, methodID);\ | |
| 1484 ResultType ret;\ | |
| 1485 DT_RETURN_MARK_FOR(Result, CallNonvirtual##Result##MethodV, ResultType, \ | |
| 1486 (const ResultType&)ret);\ | |
| 1487 \ | |
| 1488 JavaValue jvalue(Tag); \ | |
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1489 JNI_ArgumentPusherVaArg ap(methodID, args); \ |
| 0 | 1490 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_0); \ |
| 1491 ret = jvalue.get_##ResultType(); \ | |
| 1492 return ret;\ | |
| 1493 JNI_END \ | |
| 1494 \ | |
| 1495 JNI_ENTRY(ResultType, \ | |
| 1496 jni_CallNonvirtual##Result##MethodA(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, const jvalue *args)) \ | |
| 1497 JNIWrapper("CallNonvitual" XSTR(Result) "MethodA"); \ | |
| 1498 DTRACE_PROBE4(hotspot_jni, CallNonvirtual##Result##MethodA__entry, env, obj, cls, methodID);\ | |
| 1499 ResultType ret;\ | |
| 1500 DT_RETURN_MARK_FOR(Result, CallNonvirtual##Result##MethodA, ResultType, \ | |
| 1501 (const ResultType&)ret);\ | |
| 1502 \ | |
| 1503 JavaValue jvalue(Tag); \ | |
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1504 JNI_ArgumentPusherArray ap(methodID, args); \ |
| 0 | 1505 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_0); \ |
| 1506 ret = jvalue.get_##ResultType(); \ | |
| 1507 return ret;\ | |
| 1508 JNI_END | |
| 1509 | |
| 1510 // the runtime type of subword integral basic types is integer | |
| 1511 DEFINE_CALLNONVIRTUALMETHOD(jboolean, Boolean, T_BOOLEAN) | |
| 1512 DEFINE_CALLNONVIRTUALMETHOD(jbyte, Byte, T_BYTE) | |
| 1513 DEFINE_CALLNONVIRTUALMETHOD(jchar, Char, T_CHAR) | |
| 1514 DEFINE_CALLNONVIRTUALMETHOD(jshort, Short, T_SHORT) | |
| 1515 | |
| 1516 DEFINE_CALLNONVIRTUALMETHOD(jobject, Object, T_OBJECT) | |
| 1517 DEFINE_CALLNONVIRTUALMETHOD(jint, Int, T_INT) | |
| 1518 DEFINE_CALLNONVIRTUALMETHOD(jlong, Long, T_LONG) | |
| 1519 DEFINE_CALLNONVIRTUALMETHOD(jfloat, Float, T_FLOAT) | |
| 1520 DEFINE_CALLNONVIRTUALMETHOD(jdouble, Double, T_DOUBLE) | |
| 1521 | |
| 1522 | |
| 1523 DT_VOID_RETURN_MARK_DECL(CallNonvirtualVoidMethod); | |
| 1524 DT_VOID_RETURN_MARK_DECL(CallNonvirtualVoidMethodV); | |
| 1525 DT_VOID_RETURN_MARK_DECL(CallNonvirtualVoidMethodA); | |
| 1526 | |
| 1527 JNI_ENTRY(void, jni_CallNonvirtualVoidMethod(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, ...)) | |
| 1528 JNIWrapper("CallNonvirtualVoidMethod"); | |
| 1529 | |
| 1530 DTRACE_PROBE4(hotspot_jni, CallNonvirtualVoidMethod__entry, | |
| 1531 env, obj, cls, methodID); | |
| 1532 DT_VOID_RETURN_MARK(CallNonvirtualVoidMethod); | |
| 1533 | |
| 1534 va_list args; | |
| 1535 va_start(args, methodID); | |
| 1536 JavaValue jvalue(T_VOID); | |
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1537 JNI_ArgumentPusherVaArg ap(methodID, args); |
| 0 | 1538 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK); |
| 1539 va_end(args); | |
| 1540 JNI_END | |
| 1541 | |
| 1542 | |
| 1543 JNI_ENTRY(void, jni_CallNonvirtualVoidMethodV(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, va_list args)) | |
| 1544 JNIWrapper("CallNonvirtualVoidMethodV"); | |
| 1545 | |
| 1546 DTRACE_PROBE4(hotspot_jni, CallNonvirtualVoidMethodV__entry, | |
| 1547 env, obj, cls, methodID); | |
| 1548 DT_VOID_RETURN_MARK(CallNonvirtualVoidMethodV); | |
| 1549 | |
| 1550 JavaValue jvalue(T_VOID); | |
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1551 JNI_ArgumentPusherVaArg ap(methodID, args); |
| 0 | 1552 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK); |
| 1553 JNI_END | |
| 1554 | |
| 1555 | |
| 1556 JNI_ENTRY(void, jni_CallNonvirtualVoidMethodA(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, const jvalue *args)) | |
| 1557 JNIWrapper("CallNonvirtualVoidMethodA"); | |
| 1558 DTRACE_PROBE4(hotspot_jni, CallNonvirtualVoidMethodA__entry, | |
| 1559 env, obj, cls, methodID); | |
| 1560 DT_VOID_RETURN_MARK(CallNonvirtualVoidMethodA); | |
| 1561 JavaValue jvalue(T_VOID); | |
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1562 JNI_ArgumentPusherArray ap(methodID, args); |
| 0 | 1563 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK); |
| 1564 JNI_END | |
| 1565 | |
| 1566 | |
| 1567 #define DEFINE_CALLSTATICMETHOD(ResultType, Result, Tag) \ | |
| 1568 \ | |
| 1569 DT_RETURN_MARK_DECL_FOR(Result, CallStatic##Result##Method, ResultType);\ | |
| 1570 DT_RETURN_MARK_DECL_FOR(Result, CallStatic##Result##MethodV, ResultType);\ | |
| 1571 DT_RETURN_MARK_DECL_FOR(Result, CallStatic##Result##MethodA, ResultType);\ | |
| 1572 \ | |
| 1573 JNI_ENTRY(ResultType, \ | |
| 1574 jni_CallStatic##Result##Method(JNIEnv *env, jclass cls, jmethodID methodID, ...)) \ | |
| 1575 JNIWrapper("CallStatic" XSTR(Result) "Method"); \ | |
| 1576 \ | |
| 1577 DTRACE_PROBE3(hotspot_jni, CallStatic##Result##Method__entry, env, cls, methodID);\ | |
| 1578 ResultType ret = 0;\ | |
| 1579 DT_RETURN_MARK_FOR(Result, CallStatic##Result##Method, ResultType, \ | |
| 1580 (const ResultType&)ret);\ | |
| 1581 \ | |
| 1582 va_list args; \ | |
| 1583 va_start(args, methodID); \ | |
| 1584 JavaValue jvalue(Tag); \ | |
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1585 JNI_ArgumentPusherVaArg ap(methodID, args); \ |
| 0 | 1586 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK_0); \ |
| 1587 va_end(args); \ | |
| 1588 ret = jvalue.get_##ResultType(); \ | |
| 1589 return ret;\ | |
| 1590 JNI_END \ | |
| 1591 \ | |
| 1592 JNI_ENTRY(ResultType, \ | |
| 1593 jni_CallStatic##Result##MethodV(JNIEnv *env, jclass cls, jmethodID methodID, va_list args)) \ | |
| 1594 JNIWrapper("CallStatic" XSTR(Result) "MethodV"); \ | |
| 1595 DTRACE_PROBE3(hotspot_jni, CallStatic##Result##MethodV__entry, env, cls, methodID);\ | |
| 1596 ResultType ret = 0;\ | |
| 1597 DT_RETURN_MARK_FOR(Result, CallStatic##Result##MethodV, ResultType, \ | |
| 1598 (const ResultType&)ret);\ | |
| 1599 \ | |
| 1600 JavaValue jvalue(Tag); \ | |
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1601 JNI_ArgumentPusherVaArg ap(methodID, args); \ |
| 0 | 1602 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK_0); \ |
| 1603 ret = jvalue.get_##ResultType(); \ | |
| 1604 return ret;\ | |
| 1605 JNI_END \ | |
| 1606 \ | |
| 1607 JNI_ENTRY(ResultType, \ | |
| 1608 jni_CallStatic##Result##MethodA(JNIEnv *env, jclass cls, jmethodID methodID, const jvalue *args)) \ | |
| 1609 JNIWrapper("CallStatic" XSTR(Result) "MethodA"); \ | |
| 1610 DTRACE_PROBE3(hotspot_jni, CallStatic##Result##MethodA__entry, env, cls, methodID);\ | |
| 1611 ResultType ret = 0;\ | |
| 1612 DT_RETURN_MARK_FOR(Result, CallStatic##Result##MethodA, ResultType, \ | |
| 1613 (const ResultType&)ret);\ | |
| 1614 \ | |
| 1615 JavaValue jvalue(Tag); \ | |
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1616 JNI_ArgumentPusherArray ap(methodID, args); \ |
| 0 | 1617 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK_0); \ |
| 1618 ret = jvalue.get_##ResultType(); \ | |
| 1619 return ret;\ | |
| 1620 JNI_END | |
| 1621 | |
| 1622 // the runtime type of subword integral basic types is integer | |
| 1623 DEFINE_CALLSTATICMETHOD(jboolean, Boolean, T_BOOLEAN) | |
| 1624 DEFINE_CALLSTATICMETHOD(jbyte, Byte, T_BYTE) | |
| 1625 DEFINE_CALLSTATICMETHOD(jchar, Char, T_CHAR) | |
| 1626 DEFINE_CALLSTATICMETHOD(jshort, Short, T_SHORT) | |
| 1627 | |
| 1628 DEFINE_CALLSTATICMETHOD(jobject, Object, T_OBJECT) | |
| 1629 DEFINE_CALLSTATICMETHOD(jint, Int, T_INT) | |
| 1630 DEFINE_CALLSTATICMETHOD(jlong, Long, T_LONG) | |
| 1631 DEFINE_CALLSTATICMETHOD(jfloat, Float, T_FLOAT) | |
| 1632 DEFINE_CALLSTATICMETHOD(jdouble, Double, T_DOUBLE) | |
| 1633 | |
| 1634 | |
| 1635 DT_VOID_RETURN_MARK_DECL(CallStaticVoidMethod); | |
| 1636 DT_VOID_RETURN_MARK_DECL(CallStaticVoidMethodV); | |
| 1637 DT_VOID_RETURN_MARK_DECL(CallStaticVoidMethodA); | |
| 1638 | |
| 1639 JNI_ENTRY(void, jni_CallStaticVoidMethod(JNIEnv *env, jclass cls, jmethodID methodID, ...)) | |
| 1640 JNIWrapper("CallStaticVoidMethod"); | |
| 1641 DTRACE_PROBE3(hotspot_jni, CallStaticVoidMethod__entry, env, cls, methodID); | |
| 1642 DT_VOID_RETURN_MARK(CallStaticVoidMethod); | |
| 1643 | |
| 1644 va_list args; | |
| 1645 va_start(args, methodID); | |
| 1646 JavaValue jvalue(T_VOID); | |
|
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1647 JNI_ArgumentPusherVaArg ap(methodID, args); |
| 0 | 1648 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK); |
| 1649 va_end(args); | |
| 1650 JNI_END | |
| 1651 | |
| 1652 | |
| 1653 JNI_ENTRY(void, jni_CallStaticVoidMethodV(JNIEnv *env, jclass cls, jmethodID methodID, va_list args)) | |
| 1654 JNIWrapper("CallStaticVoidMethodV"); | |
| 1655 DTRACE_PROBE3(hotspot_jni, CallStaticVoidMethodV__entry, env, cls, methodID); | |
| 1656 DT_VOID_RETURN_MARK(CallStaticVoidMethodV); | |
| 1657 | |
| 1658 JavaValue jvalue(T_VOID); | |
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1659 JNI_ArgumentPusherVaArg ap(methodID, args); |
| 0 | 1660 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK); |
| 1661 JNI_END | |
| 1662 | |
| 1663 | |
| 1664 JNI_ENTRY(void, jni_CallStaticVoidMethodA(JNIEnv *env, jclass cls, jmethodID methodID, const jvalue *args)) | |
| 1665 JNIWrapper("CallStaticVoidMethodA"); | |
| 1666 DTRACE_PROBE3(hotspot_jni, CallStaticVoidMethodA__entry, env, cls, methodID); | |
| 1667 DT_VOID_RETURN_MARK(CallStaticVoidMethodA); | |
| 1668 | |
| 1669 JavaValue jvalue(T_VOID); | |
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1670 JNI_ArgumentPusherArray ap(methodID, args); |
| 0 | 1671 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK); |
| 1672 JNI_END | |
| 1673 | |
| 1674 | |
| 1675 // | |
| 1676 // Accessing Fields | |
| 1677 // | |
| 1678 | |
| 1679 | |
| 1680 DT_RETURN_MARK_DECL(GetFieldID, jfieldID); | |
| 1681 | |
| 1682 JNI_ENTRY(jfieldID, jni_GetFieldID(JNIEnv *env, jclass clazz, | |
| 1683 const char *name, const char *sig)) | |
| 1684 JNIWrapper("GetFieldID"); | |
| 1685 DTRACE_PROBE4(hotspot_jni, GetFieldID__entry, env, clazz, name, sig); | |
| 1686 jfieldID ret = 0; | |
| 1687 DT_RETURN_MARK(GetFieldID, jfieldID, (const jfieldID&)ret); | |
| 1688 | |
| 1689 // The class should have been loaded (we have an instance of the class | |
| 1690 // passed in) so the field and signature should already be in the symbol | |
| 1691 // table. If they're not there, the field doesn't exist. | |
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1692 TempNewSymbol fieldname = SymbolTable::probe(name, (int)strlen(name)); |
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1693 TempNewSymbol signame = SymbolTable::probe(sig, (int)strlen(sig)); |
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1694 if (fieldname == NULL || signame == NULL) { |
| 0 | 1695 THROW_MSG_0(vmSymbols::java_lang_NoSuchFieldError(), (char*) name); |
| 1696 } | |
| 1697 KlassHandle k(THREAD, | |
| 1698 java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(clazz))); | |
| 1699 // Make sure class is initialized before handing id's out to fields | |
| 1700 Klass::cast(k())->initialize(CHECK_NULL); | |
| 1701 | |
| 1702 fieldDescriptor fd; | |
| 1703 if (!Klass::cast(k())->oop_is_instance() || | |
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1704 !instanceKlass::cast(k())->find_field(fieldname, signame, false, &fd)) { |
| 0 | 1705 THROW_MSG_0(vmSymbols::java_lang_NoSuchFieldError(), (char*) name); |
| 1706 } | |
| 1707 | |
| 1708 // A jfieldID for a non-static field is simply the offset of the field within the instanceOop | |
| 1709 // It may also have hash bits for k, if VerifyJNIFields is turned on. | |
| 1710 ret = jfieldIDWorkaround::to_instance_jfieldID(k(), fd.offset()); | |
| 1711 return ret; | |
| 1712 JNI_END | |
| 1713 | |
| 1714 | |
| 1715 JNI_ENTRY(jobject, jni_GetObjectField(JNIEnv *env, jobject obj, jfieldID fieldID)) | |
| 1716 JNIWrapper("GetObjectField"); | |
| 1717 DTRACE_PROBE3(hotspot_jni, GetObjectField__entry, env, obj, fieldID); | |
| 1718 oop o = JNIHandles::resolve_non_null(obj); | |
| 1719 klassOop k = o->klass(); | |
| 1720 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID); | |
| 1721 // Keep JVMTI addition small and only check enabled flag here. | |
| 1722 // jni_GetField_probe() assumes that is okay to create handles. | |
| 1723 if (JvmtiExport::should_post_field_access()) { | |
| 1724 o = JvmtiExport::jni_GetField_probe(thread, obj, o, k, fieldID, false); | |
| 1725 } | |
| 1726 jobject ret = JNIHandles::make_local(env, o->obj_field(offset)); | |
| 1727 DTRACE_PROBE1(hotspot_jni, GetObjectField__return, ret); | |
| 1728 return ret; | |
| 1729 JNI_END | |
| 1730 | |
| 1731 | |
| 1732 #define DEFINE_GETFIELD(Return,Fieldname,Result) \ | |
| 1733 \ | |
| 1734 DT_RETURN_MARK_DECL_FOR(Result, Get##Result##Field, Return);\ | |
| 1735 \ | |
| 1736 JNI_QUICK_ENTRY(Return, jni_Get##Result##Field(JNIEnv *env, jobject obj, jfieldID fieldID)) \ | |
| 1737 JNIWrapper("Get" XSTR(Result) "Field"); \ | |
| 1738 \ | |
| 1739 DTRACE_PROBE3(hotspot_jni, Get##Result##Field__entry, env, obj, fieldID);\ | |
| 1740 Return ret = 0;\ | |
| 1741 DT_RETURN_MARK_FOR(Result, Get##Result##Field, Return, (const Return&)ret);\ | |
| 1742 \ | |
| 1743 oop o = JNIHandles::resolve_non_null(obj); \ | |
| 1744 klassOop k = o->klass(); \ | |
| 1745 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID); \ | |
| 1746 /* Keep JVMTI addition small and only check enabled flag here. */ \ | |
| 1747 /* jni_GetField_probe_nh() assumes that is not okay to create handles */ \ | |
| 1748 /* and creates a ResetNoHandleMark. */ \ | |
| 1749 if (JvmtiExport::should_post_field_access()) { \ | |
| 1750 o = JvmtiExport::jni_GetField_probe_nh(thread, obj, o, k, fieldID, false); \ | |
| 1751 } \ | |
| 1752 ret = o->Fieldname##_field(offset); \ | |
| 1753 return ret; \ | |
| 1754 JNI_END | |
| 1755 | |
| 1756 DEFINE_GETFIELD(jboolean, bool, Boolean) | |
| 1757 DEFINE_GETFIELD(jbyte, byte, Byte) | |
| 1758 DEFINE_GETFIELD(jchar, char, Char) | |
| 1759 DEFINE_GETFIELD(jshort, short, Short) | |
| 1760 DEFINE_GETFIELD(jint, int, Int) | |
| 1761 DEFINE_GETFIELD(jlong, long, Long) | |
| 1762 DEFINE_GETFIELD(jfloat, float, Float) | |
| 1763 DEFINE_GETFIELD(jdouble, double, Double) | |
| 1764 | |
| 1765 address jni_GetBooleanField_addr() { | |
| 1766 return (address)jni_GetBooleanField; | |
| 1767 } | |
| 1768 address jni_GetByteField_addr() { | |
| 1769 return (address)jni_GetByteField; | |
| 1770 } | |
| 1771 address jni_GetCharField_addr() { | |
| 1772 return (address)jni_GetCharField; | |
| 1773 } | |
| 1774 address jni_GetShortField_addr() { | |
| 1775 return (address)jni_GetShortField; | |
| 1776 } | |
| 1777 address jni_GetIntField_addr() { | |
| 1778 return (address)jni_GetIntField; | |
| 1779 } | |
| 1780 address jni_GetLongField_addr() { | |
| 1781 return (address)jni_GetLongField; | |
| 1782 } | |
| 1783 address jni_GetFloatField_addr() { | |
| 1784 return (address)jni_GetFloatField; | |
| 1785 } | |
| 1786 address jni_GetDoubleField_addr() { | |
| 1787 return (address)jni_GetDoubleField; | |
| 1788 } | |
| 1789 | |
| 1790 JNI_QUICK_ENTRY(void, jni_SetObjectField(JNIEnv *env, jobject obj, jfieldID fieldID, jobject value)) | |
| 1791 JNIWrapper("SetObjectField"); | |
| 1792 DTRACE_PROBE4(hotspot_jni, SetObjectField__entry, env, obj, fieldID, value); | |
| 1793 oop o = JNIHandles::resolve_non_null(obj); | |
| 1794 klassOop k = o->klass(); | |
| 1795 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID); | |
| 1796 // Keep JVMTI addition small and only check enabled flag here. | |
| 1797 // jni_SetField_probe_nh() assumes that is not okay to create handles | |
| 1798 // and creates a ResetNoHandleMark. | |
| 1799 if (JvmtiExport::should_post_field_modification()) { | |
| 1800 jvalue field_value; | |
| 1801 field_value.l = value; | |
| 1802 o = JvmtiExport::jni_SetField_probe_nh(thread, obj, o, k, fieldID, false, 'L', (jvalue *)&field_value); | |
| 1803 } | |
| 1804 o->obj_field_put(offset, JNIHandles::resolve(value)); | |
| 1805 DTRACE_PROBE(hotspot_jni, SetObjectField__return); | |
| 1806 JNI_END | |
| 1807 | |
| 1808 #define DEFINE_SETFIELD(Argument,Fieldname,Result,SigType,unionType) \ | |
| 1809 \ | |
| 1810 JNI_QUICK_ENTRY(void, jni_Set##Result##Field(JNIEnv *env, jobject obj, jfieldID fieldID, Argument value)) \ | |
| 1811 JNIWrapper("Set" XSTR(Result) "Field"); \ | |
| 1812 \ | |
| 1813 HS_DTRACE_PROBE_CDECL_N(hotspot_jni, Set##Result##Field__entry, \ | |
| 1814 ( JNIEnv*, jobject, jfieldID FP_SELECT_##Result(COMMA Argument,/*empty*/) ) ); \ | |
| 1815 HS_DTRACE_PROBE_N(hotspot_jni, Set##Result##Field__entry, \ | |
| 1816 ( env, obj, fieldID FP_SELECT_##Result(COMMA value,/*empty*/) ) ); \ | |
| 1817 \ | |
| 1818 oop o = JNIHandles::resolve_non_null(obj); \ | |
| 1819 klassOop k = o->klass(); \ | |
| 1820 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID); \ | |
| 1821 /* Keep JVMTI addition small and only check enabled flag here. */ \ | |
| 1822 /* jni_SetField_probe_nh() assumes that is not okay to create handles */ \ | |
| 1823 /* and creates a ResetNoHandleMark. */ \ | |
| 1824 if (JvmtiExport::should_post_field_modification()) { \ | |
| 1825 jvalue field_value; \ | |
| 1826 field_value.unionType = value; \ | |
| 1827 o = JvmtiExport::jni_SetField_probe_nh(thread, obj, o, k, fieldID, false, SigType, (jvalue *)&field_value); \ | |
| 1828 } \ | |
| 1829 o->Fieldname##_field_put(offset, value); \ | |
| 1830 DTRACE_PROBE(hotspot_jni, Set##Result##Field__return);\ | |
| 1831 JNI_END | |
| 1832 | |
| 1833 DEFINE_SETFIELD(jboolean, bool, Boolean, 'Z', z) | |
| 1834 DEFINE_SETFIELD(jbyte, byte, Byte, 'B', b) | |
| 1835 DEFINE_SETFIELD(jchar, char, Char, 'C', c) | |
| 1836 DEFINE_SETFIELD(jshort, short, Short, 'S', s) | |
| 1837 DEFINE_SETFIELD(jint, int, Int, 'I', i) | |
| 1838 DEFINE_SETFIELD(jlong, long, Long, 'J', j) | |
| 1839 DEFINE_SETFIELD(jfloat, float, Float, 'F', f) | |
| 1840 DEFINE_SETFIELD(jdouble, double, Double, 'D', d) | |
| 1841 | |
| 1842 DT_RETURN_MARK_DECL(ToReflectedField, jobject); | |
| 1843 | |
| 1844 JNI_ENTRY(jobject, jni_ToReflectedField(JNIEnv *env, jclass cls, jfieldID fieldID, jboolean isStatic)) | |
| 1845 JNIWrapper("ToReflectedField"); | |
| 1846 DTRACE_PROBE4(hotspot_jni, ToReflectedField__entry, | |
| 1847 env, cls, fieldID, isStatic); | |
| 1848 jobject ret = NULL; | |
| 1849 DT_RETURN_MARK(ToReflectedField, jobject, (const jobject&)ret); | |
| 1850 | |
| 1851 fieldDescriptor fd; | |
| 1852 bool found = false; | |
| 1853 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); | |
| 1854 | |
| 1855 assert(jfieldIDWorkaround::is_static_jfieldID(fieldID) == (isStatic != 0), "invalid fieldID"); | |
| 1856 | |
| 1857 if (isStatic) { | |
| 1858 // Static field. The fieldID a JNIid specifying the field holder and the offset within the klassOop. | |
| 1859 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID); | |
| 1860 assert(id->is_static_field_id(), "invalid static field id"); | |
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1861 found = id->find_local_field(&fd); |
| 0 | 1862 } else { |
| 1863 // Non-static field. The fieldID is really the offset of the field within the instanceOop. | |
| 1864 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID); | |
| 1865 found = instanceKlass::cast(k)->find_field_from_offset(offset, false, &fd); | |
| 1866 } | |
| 1867 assert(found, "bad fieldID passed into jni_ToReflectedField"); | |
| 1868 oop reflected = Reflection::new_field(&fd, UseNewReflection, CHECK_NULL); | |
| 1869 ret = JNIHandles::make_local(env, reflected); | |
| 1870 return ret; | |
| 1871 JNI_END | |
| 1872 | |
| 1873 | |
| 1874 // | |
| 1875 // Accessing Static Fields | |
| 1876 // | |
| 1877 DT_RETURN_MARK_DECL(GetStaticFieldID, jfieldID); | |
| 1878 | |
| 1879 JNI_ENTRY(jfieldID, jni_GetStaticFieldID(JNIEnv *env, jclass clazz, | |
| 1880 const char *name, const char *sig)) | |
| 1881 JNIWrapper("GetStaticFieldID"); | |
| 1882 DTRACE_PROBE4(hotspot_jni, GetStaticFieldID__entry, env, clazz, name, sig); | |
| 1883 jfieldID ret = NULL; | |
| 1884 DT_RETURN_MARK(GetStaticFieldID, jfieldID, (const jfieldID&)ret); | |
| 1885 | |
| 1886 // The class should have been loaded (we have an instance of the class | |
| 1887 // passed in) so the field and signature should already be in the symbol | |
| 1888 // table. If they're not there, the field doesn't exist. | |
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1889 TempNewSymbol fieldname = SymbolTable::probe(name, (int)strlen(name)); |
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1890 TempNewSymbol signame = SymbolTable::probe(sig, (int)strlen(sig)); |
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1891 if (fieldname == NULL || signame == NULL) { |
| 0 | 1892 THROW_MSG_0(vmSymbols::java_lang_NoSuchFieldError(), (char*) name); |
| 1893 } | |
| 1894 KlassHandle k(THREAD, | |
| 1895 java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(clazz))); | |
| 1896 // Make sure class is initialized before handing id's out to static fields | |
| 1897 Klass::cast(k())->initialize(CHECK_NULL); | |
| 1898 | |
| 1899 fieldDescriptor fd; | |
| 1900 if (!Klass::cast(k())->oop_is_instance() || | |
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1901 !instanceKlass::cast(k())->find_field(fieldname, signame, true, &fd)) { |
| 0 | 1902 THROW_MSG_0(vmSymbols::java_lang_NoSuchFieldError(), (char*) name); |
| 1903 } | |
| 1904 | |
| 1905 // A jfieldID for a static field is a JNIid specifying the field holder and the offset within the klassOop | |
| 1906 JNIid* id = instanceKlass::cast(fd.field_holder())->jni_id_for(fd.offset()); | |
| 1907 debug_only(id->set_is_static_field_id();) | |
| 1908 | |
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1909 debug_only(id->verify(fd.field_holder())); |
| 0 | 1910 |
| 1911 ret = jfieldIDWorkaround::to_static_jfieldID(id); | |
| 1912 return ret; | |
| 1913 JNI_END | |
| 1914 | |
| 1915 | |
| 1916 JNI_ENTRY(jobject, jni_GetStaticObjectField(JNIEnv *env, jclass clazz, jfieldID fieldID)) | |
| 1917 JNIWrapper("GetStaticObjectField"); | |
| 1918 DTRACE_PROBE3(hotspot_jni, GetStaticObjectField__entry, env, clazz, fieldID); | |
| 1919 #ifndef JNICHECK_KERNEL | |
| 1920 DEBUG_ONLY(klassOop param_k = jniCheck::validate_class(thread, clazz);) | |
| 1921 #endif // JNICHECK_KERNEL | |
| 1922 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID); | |
| 1923 assert(id->is_static_field_id(), "invalid static field id"); | |
| 1924 // Keep JVMTI addition small and only check enabled flag here. | |
| 1925 // jni_GetField_probe() assumes that is okay to create handles. | |
| 1926 if (JvmtiExport::should_post_field_access()) { | |
| 1927 JvmtiExport::jni_GetField_probe(thread, NULL, NULL, id->holder(), fieldID, true); | |
| 1928 } | |
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1929 jobject ret = JNIHandles::make_local(id->holder()->java_mirror()->obj_field(id->offset())); |
| 0 | 1930 DTRACE_PROBE1(hotspot_jni, GetStaticObjectField__return, ret); |
| 1931 return ret; | |
| 1932 JNI_END | |
| 1933 | |
| 1934 #define DEFINE_GETSTATICFIELD(Return,Fieldname,Result) \ | |
| 1935 \ | |
| 1936 DT_RETURN_MARK_DECL_FOR(Result, GetStatic##Result##Field, Return);\ | |
| 1937 \ | |
| 1938 JNI_ENTRY(Return, jni_GetStatic##Result##Field(JNIEnv *env, jclass clazz, jfieldID fieldID)) \ | |
| 1939 JNIWrapper("GetStatic" XSTR(Result) "Field"); \ | |
| 1940 DTRACE_PROBE3(hotspot_jni, GetStatic##Result##Field__entry, env, clazz, fieldID);\ | |
| 1941 Return ret = 0;\ | |
| 1942 DT_RETURN_MARK_FOR(Result, GetStatic##Result##Field, Return, \ | |
| 1943 (const Return&)ret);\ | |
| 1944 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID); \ | |
| 1945 assert(id->is_static_field_id(), "invalid static field id"); \ | |
| 1946 /* Keep JVMTI addition small and only check enabled flag here. */ \ | |
| 1947 /* jni_GetField_probe() assumes that is okay to create handles. */ \ | |
| 1948 if (JvmtiExport::should_post_field_access()) { \ | |
| 1949 JvmtiExport::jni_GetField_probe(thread, NULL, NULL, id->holder(), fieldID, true); \ | |
| 1950 } \ | |
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1951 ret = id->holder()->java_mirror()-> Fieldname##_field (id->offset()); \ |
| 0 | 1952 return ret;\ |
| 1953 JNI_END | |
| 1954 | |
| 1955 DEFINE_GETSTATICFIELD(jboolean, bool, Boolean) | |
| 1956 DEFINE_GETSTATICFIELD(jbyte, byte, Byte) | |
| 1957 DEFINE_GETSTATICFIELD(jchar, char, Char) | |
| 1958 DEFINE_GETSTATICFIELD(jshort, short, Short) | |
| 1959 DEFINE_GETSTATICFIELD(jint, int, Int) | |
| 1960 DEFINE_GETSTATICFIELD(jlong, long, Long) | |
| 1961 DEFINE_GETSTATICFIELD(jfloat, float, Float) | |
| 1962 DEFINE_GETSTATICFIELD(jdouble, double, Double) | |
| 1963 | |
| 1964 | |
| 1965 JNI_ENTRY(void, jni_SetStaticObjectField(JNIEnv *env, jclass clazz, jfieldID fieldID, jobject value)) | |
| 1966 JNIWrapper("SetStaticObjectField"); | |
| 1967 DTRACE_PROBE4(hotspot_jni, SetStaticObjectField__entry, env, clazz, fieldID, value); | |
| 1968 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID); | |
| 1969 assert(id->is_static_field_id(), "invalid static field id"); | |
| 1970 // Keep JVMTI addition small and only check enabled flag here. | |
| 1971 // jni_SetField_probe() assumes that is okay to create handles. | |
| 1972 if (JvmtiExport::should_post_field_modification()) { | |
| 1973 jvalue field_value; | |
| 1974 field_value.l = value; | |
| 1975 JvmtiExport::jni_SetField_probe(thread, NULL, NULL, id->holder(), fieldID, true, 'L', (jvalue *)&field_value); | |
| 1976 } | |
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1977 id->holder()->java_mirror()->obj_field_put(id->offset(), JNIHandles::resolve(value)); |
| 0 | 1978 DTRACE_PROBE(hotspot_jni, SetStaticObjectField__return); |
| 1979 JNI_END | |
| 1980 | |
| 1981 | |
| 1982 #define DEFINE_SETSTATICFIELD(Argument,Fieldname,Result,SigType,unionType) \ | |
| 1983 \ | |
| 1984 JNI_ENTRY(void, jni_SetStatic##Result##Field(JNIEnv *env, jclass clazz, jfieldID fieldID, Argument value)) \ | |
| 1985 JNIWrapper("SetStatic" XSTR(Result) "Field"); \ | |
| 1986 HS_DTRACE_PROBE_CDECL_N(hotspot_jni, SetStatic##Result##Field__entry,\ | |
| 1987 ( JNIEnv*, jclass, jfieldID FP_SELECT_##Result(COMMA Argument,/*empty*/) ) ); \ | |
| 1988 HS_DTRACE_PROBE_N(hotspot_jni, SetStatic##Result##Field__entry, \ | |
| 1989 ( env, clazz, fieldID FP_SELECT_##Result(COMMA value,/*empty*/) ) ); \ | |
| 1990 \ | |
| 1991 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID); \ | |
| 1992 assert(id->is_static_field_id(), "invalid static field id"); \ | |
| 1993 /* Keep JVMTI addition small and only check enabled flag here. */ \ | |
| 1994 /* jni_SetField_probe() assumes that is okay to create handles. */ \ | |
| 1995 if (JvmtiExport::should_post_field_modification()) { \ | |
| 1996 jvalue field_value; \ | |
| 1997 field_value.unionType = value; \ | |
| 1998 JvmtiExport::jni_SetField_probe(thread, NULL, NULL, id->holder(), fieldID, true, SigType, (jvalue *)&field_value); \ | |
| 1999 } \ | |
|
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2000 id->holder()->java_mirror()-> Fieldname##_field_put (id->offset(), value); \ |
| 0 | 2001 DTRACE_PROBE(hotspot_jni, SetStatic##Result##Field__return);\ |
| 2002 JNI_END | |
| 2003 | |
| 2004 DEFINE_SETSTATICFIELD(jboolean, bool, Boolean, 'Z', z) | |
| 2005 DEFINE_SETSTATICFIELD(jbyte, byte, Byte, 'B', b) | |
| 2006 DEFINE_SETSTATICFIELD(jchar, char, Char, 'C', c) | |
| 2007 DEFINE_SETSTATICFIELD(jshort, short, Short, 'S', s) | |
| 2008 DEFINE_SETSTATICFIELD(jint, int, Int, 'I', i) | |
| 2009 DEFINE_SETSTATICFIELD(jlong, long, Long, 'J', j) | |
| 2010 DEFINE_SETSTATICFIELD(jfloat, float, Float, 'F', f) | |
| 2011 DEFINE_SETSTATICFIELD(jdouble, double, Double, 'D', d) | |
| 2012 | |
| 2013 | |
| 2014 // | |
| 2015 // String Operations | |
| 2016 // | |
| 2017 | |
| 2018 // Unicode Interface | |
| 2019 | |
| 2020 DT_RETURN_MARK_DECL(NewString, jstring); | |
| 2021 | |
| 2022 JNI_ENTRY(jstring, jni_NewString(JNIEnv *env, const jchar *unicodeChars, jsize len)) | |
| 2023 JNIWrapper("NewString"); | |
| 2024 DTRACE_PROBE3(hotspot_jni, NewString__entry, env, unicodeChars, len); | |
| 2025 jstring ret = NULL; | |
| 2026 DT_RETURN_MARK(NewString, jstring, (const jstring&)ret); | |
| 2027 oop string=java_lang_String::create_oop_from_unicode((jchar*) unicodeChars, len, CHECK_NULL); | |
| 2028 ret = (jstring) JNIHandles::make_local(env, string); | |
| 2029 return ret; | |
| 2030 JNI_END | |
| 2031 | |
| 2032 | |
| 2033 JNI_QUICK_ENTRY(jsize, jni_GetStringLength(JNIEnv *env, jstring string)) | |
| 2034 JNIWrapper("GetStringLength"); | |
| 2035 DTRACE_PROBE2(hotspot_jni, GetStringLength__entry, env, string); | |
| 2036 jsize ret = java_lang_String::length(JNIHandles::resolve_non_null(string)); | |
| 2037 DTRACE_PROBE1(hotspot_jni, GetStringLength__return, ret); | |
| 2038 return ret; | |
| 2039 JNI_END | |
| 2040 | |
| 2041 | |
| 2042 JNI_QUICK_ENTRY(const jchar*, jni_GetStringChars( | |
| 2043 JNIEnv *env, jstring string, jboolean *isCopy)) | |
| 2044 JNIWrapper("GetStringChars"); | |
| 2045 DTRACE_PROBE3(hotspot_jni, GetStringChars__entry, env, string, isCopy); | |
| 2046 //%note jni_5 | |
| 2047 if (isCopy != NULL) { | |
| 2048 *isCopy = JNI_TRUE; | |
| 2049 } | |
| 2050 oop s = JNIHandles::resolve_non_null(string); | |
| 2051 int s_len = java_lang_String::length(s); | |
| 2052 typeArrayOop s_value = java_lang_String::value(s); | |
| 2053 int s_offset = java_lang_String::offset(s); | |
| 2054 jchar* buf = NEW_C_HEAP_ARRAY(jchar, s_len + 1); // add one for zero termination | |
| 2055 if (s_len > 0) { | |
| 2056 memcpy(buf, s_value->char_at_addr(s_offset), sizeof(jchar)*s_len); | |
| 2057 } | |
| 2058 buf[s_len] = 0; | |
| 2059 DTRACE_PROBE1(hotspot_jni, GetStringChars__return, buf); | |
| 2060 return buf; | |
| 2061 JNI_END | |
| 2062 | |
| 2063 | |
| 2064 JNI_QUICK_ENTRY(void, jni_ReleaseStringChars(JNIEnv *env, jstring str, const jchar *chars)) | |
| 2065 JNIWrapper("ReleaseStringChars"); | |
| 2066 DTRACE_PROBE3(hotspot_jni, ReleaseStringChars__entry, env, str, chars); | |
| 2067 //%note jni_6 | |
| 2068 if (chars != NULL) { | |
| 2069 // Since String objects are supposed to be immutable, don't copy any | |
| 2070 // new data back. A bad user will have to go after the char array. | |
| 2071 FreeHeap((void*) chars); | |
| 2072 } | |
| 2073 DTRACE_PROBE(hotspot_jni, ReleaseStringChars__return); | |
| 2074 JNI_END | |
| 2075 | |
| 2076 | |
| 2077 // UTF Interface | |
| 2078 | |
| 2079 DT_RETURN_MARK_DECL(NewStringUTF, jstring); | |
| 2080 | |
| 2081 JNI_ENTRY(jstring, jni_NewStringUTF(JNIEnv *env, const char *bytes)) | |
| 2082 JNIWrapper("NewStringUTF"); | |
| 2083 DTRACE_PROBE2(hotspot_jni, NewStringUTF__entry, env, bytes); | |
| 2084 jstring ret; | |
| 2085 DT_RETURN_MARK(NewStringUTF, jstring, (const jstring&)ret); | |
| 2086 | |
| 2087 oop result = java_lang_String::create_oop_from_str((char*) bytes, CHECK_NULL); | |
| 2088 ret = (jstring) JNIHandles::make_local(env, result); | |
| 2089 return ret; | |
| 2090 JNI_END | |
| 2091 | |
| 2092 | |
| 2093 JNI_ENTRY(jsize, jni_GetStringUTFLength(JNIEnv *env, jstring string)) | |
| 2094 JNIWrapper("GetStringUTFLength"); | |
| 2095 DTRACE_PROBE2(hotspot_jni, GetStringUTFLength__entry, env, string); | |
| 2096 jsize ret = java_lang_String::utf8_length(JNIHandles::resolve_non_null(string)); | |
| 2097 DTRACE_PROBE1(hotspot_jni, GetStringUTFLength__return, ret); | |
| 2098 return ret; | |
| 2099 JNI_END | |
| 2100 | |
| 2101 | |
| 2102 JNI_ENTRY(const char*, jni_GetStringUTFChars(JNIEnv *env, jstring string, jboolean *isCopy)) | |
| 2103 JNIWrapper("GetStringUTFChars"); | |
| 2104 DTRACE_PROBE3(hotspot_jni, GetStringUTFChars__entry, env, string, isCopy); | |
|
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|
2105 oop java_string = JNIHandles::resolve_non_null(string); |
|
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|
2106 size_t length = java_lang_String::utf8_length(java_string); |
|
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|
2107 char* result = AllocateHeap(length + 1, "GetStringUTFChars"); |
|
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|
2108 java_lang_String::as_utf8_string(java_string, result, (int) length + 1); |
| 0 | 2109 if (isCopy != NULL) *isCopy = JNI_TRUE; |
| 2110 DTRACE_PROBE1(hotspot_jni, GetStringUTFChars__return, result); | |
| 2111 return result; | |
| 2112 JNI_END | |
| 2113 | |
| 2114 | |
| 2115 JNI_LEAF(void, jni_ReleaseStringUTFChars(JNIEnv *env, jstring str, const char *chars)) | |
| 2116 JNIWrapper("ReleaseStringUTFChars"); | |
| 2117 DTRACE_PROBE3(hotspot_jni, ReleaseStringUTFChars__entry, env, str, chars); | |
| 2118 if (chars != NULL) { | |
| 2119 FreeHeap((char*) chars); | |
| 2120 } | |
| 2121 DTRACE_PROBE(hotspot_jni, ReleaseStringUTFChars__return); | |
| 2122 JNI_END | |
| 2123 | |
| 2124 | |
| 2125 JNI_QUICK_ENTRY(jsize, jni_GetArrayLength(JNIEnv *env, jarray array)) | |
| 2126 JNIWrapper("GetArrayLength"); | |
| 2127 DTRACE_PROBE2(hotspot_jni, GetArrayLength__entry, env, array); | |
| 2128 arrayOop a = arrayOop(JNIHandles::resolve_non_null(array)); | |
| 2129 assert(a->is_array(), "must be array"); | |
| 2130 jsize ret = a->length(); | |
| 2131 DTRACE_PROBE1(hotspot_jni, GetArrayLength__return, ret); | |
| 2132 return ret; | |
| 2133 JNI_END | |
| 2134 | |
| 2135 | |
| 2136 // | |
| 2137 // Object Array Operations | |
| 2138 // | |
| 2139 | |
| 2140 DT_RETURN_MARK_DECL(NewObjectArray, jobjectArray); | |
| 2141 | |
| 2142 JNI_ENTRY(jobjectArray, jni_NewObjectArray(JNIEnv *env, jsize length, jclass elementClass, jobject initialElement)) | |
| 2143 JNIWrapper("NewObjectArray"); | |
| 2144 DTRACE_PROBE4(hotspot_jni, NewObjectArray__entry, env, length, elementClass, initialElement); | |
| 2145 jobjectArray ret = NULL; | |
| 2146 DT_RETURN_MARK(NewObjectArray, jobjectArray, (const jobjectArray&)ret); | |
| 2147 KlassHandle ek(THREAD, java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(elementClass))); | |
| 2148 klassOop ako = Klass::cast(ek())->array_klass(CHECK_NULL); | |
| 2149 KlassHandle ak = KlassHandle(THREAD, ako); | |
| 2150 objArrayKlass::cast(ak())->initialize(CHECK_NULL); | |
| 2151 objArrayOop result = objArrayKlass::cast(ak())->allocate(length, CHECK_NULL); | |
| 2152 oop initial_value = JNIHandles::resolve(initialElement); | |
| 2153 if (initial_value != NULL) { // array already initialized with NULL | |
| 2154 for (int index = 0; index < length; index++) { | |
| 2155 result->obj_at_put(index, initial_value); | |
| 2156 } | |
| 2157 } | |
| 2158 ret = (jobjectArray) JNIHandles::make_local(env, result); | |
| 2159 return ret; | |
| 2160 JNI_END | |
| 2161 | |
| 2162 DT_RETURN_MARK_DECL(GetObjectArrayElement, jobject); | |
| 2163 | |
| 2164 JNI_ENTRY(jobject, jni_GetObjectArrayElement(JNIEnv *env, jobjectArray array, jsize index)) | |
| 2165 JNIWrapper("GetObjectArrayElement"); | |
| 2166 DTRACE_PROBE3(hotspot_jni, GetObjectArrayElement__entry, env, array, index); | |
| 2167 jobject ret = NULL; | |
| 2168 DT_RETURN_MARK(GetObjectArrayElement, jobject, (const jobject&)ret); | |
| 2169 objArrayOop a = objArrayOop(JNIHandles::resolve_non_null(array)); | |
| 2170 if (a->is_within_bounds(index)) { | |
|
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|
2171 ret = JNIHandles::make_local(env, a->obj_at(index)); |
| 0 | 2172 return ret; |
| 2173 } else { | |
| 2174 char buf[jintAsStringSize]; | |
| 2175 sprintf(buf, "%d", index); | |
| 2176 THROW_MSG_0(vmSymbols::java_lang_ArrayIndexOutOfBoundsException(), buf); | |
| 2177 } | |
| 2178 JNI_END | |
| 2179 | |
| 2180 DT_VOID_RETURN_MARK_DECL(SetObjectArrayElement); | |
| 2181 | |
| 2182 JNI_ENTRY(void, jni_SetObjectArrayElement(JNIEnv *env, jobjectArray array, jsize index, jobject value)) | |
| 2183 JNIWrapper("SetObjectArrayElement"); | |
| 2184 DTRACE_PROBE4(hotspot_jni, SetObjectArrayElement__entry, env, array, index, value); | |
| 2185 DT_VOID_RETURN_MARK(SetObjectArrayElement); | |
| 2186 | |
| 2187 objArrayOop a = objArrayOop(JNIHandles::resolve_non_null(array)); | |
| 2188 oop v = JNIHandles::resolve(value); | |
| 2189 if (a->is_within_bounds(index)) { | |
| 2190 if (v == NULL || v->is_a(objArrayKlass::cast(a->klass())->element_klass())) { | |
| 2191 a->obj_at_put(index, v); | |
| 2192 } else { | |
| 2193 THROW(vmSymbols::java_lang_ArrayStoreException()); | |
| 2194 } | |
| 2195 } else { | |
| 2196 char buf[jintAsStringSize]; | |
| 2197 sprintf(buf, "%d", index); | |
| 2198 THROW_MSG(vmSymbols::java_lang_ArrayIndexOutOfBoundsException(), buf); | |
| 2199 } | |
| 2200 JNI_END | |
| 2201 | |
| 2202 | |
| 2203 #define DEFINE_NEWSCALARARRAY(Return,Allocator,Result) \ | |
| 2204 \ | |
|
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|
2205 DT_RETURN_MARK_DECL(New##Result##Array, Return);\ |
| 0 | 2206 \ |
| 2207 JNI_ENTRY(Return, \ | |
| 2208 jni_New##Result##Array(JNIEnv *env, jsize len)) \ | |
| 2209 JNIWrapper("New" XSTR(Result) "Array"); \ | |
| 2210 DTRACE_PROBE2(hotspot_jni, New##Result##Array__entry, env, len);\ | |
| 2211 Return ret = NULL;\ | |
|
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|
2212 DT_RETURN_MARK(New##Result##Array, Return, (const Return&)ret);\ |
| 0 | 2213 \ |
| 2214 oop obj= oopFactory::Allocator(len, CHECK_0); \ | |
| 2215 ret = (Return) JNIHandles::make_local(env, obj); \ | |
| 2216 return ret;\ | |
| 2217 JNI_END | |
| 2218 | |
| 2219 DEFINE_NEWSCALARARRAY(jbooleanArray, new_boolArray, Boolean) | |
| 2220 DEFINE_NEWSCALARARRAY(jbyteArray, new_byteArray, Byte) | |
| 2221 DEFINE_NEWSCALARARRAY(jshortArray, new_shortArray, Short) | |
| 2222 DEFINE_NEWSCALARARRAY(jcharArray, new_charArray, Char) | |
| 2223 DEFINE_NEWSCALARARRAY(jintArray, new_intArray, Int) | |
| 2224 DEFINE_NEWSCALARARRAY(jlongArray, new_longArray, Long) | |
| 2225 DEFINE_NEWSCALARARRAY(jfloatArray, new_singleArray, Float) | |
| 2226 DEFINE_NEWSCALARARRAY(jdoubleArray, new_doubleArray, Double) | |
| 2227 | |
| 2228 | |
| 2229 // Return an address which will fault if the caller writes to it. | |
| 2230 | |
| 2231 static char* get_bad_address() { | |
| 2232 static char* bad_address = NULL; | |
| 2233 if (bad_address == NULL) { | |
| 2234 size_t size = os::vm_allocation_granularity(); | |
| 2235 bad_address = os::reserve_memory(size); | |
| 2236 if (bad_address != NULL) { | |
|
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|
2237 os::protect_memory(bad_address, size, os::MEM_PROT_READ, |
|
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|
2238 /*is_committed*/false); |
| 0 | 2239 } |
| 2240 } | |
| 2241 return bad_address; | |
| 2242 } | |
| 2243 | |
| 2244 | |
| 2245 #define DEFINE_GETSCALARARRAYELEMENTS(ElementTag,ElementType,Result, Tag) \ | |
| 2246 \ | |
| 2247 JNI_QUICK_ENTRY(ElementType*, \ | |
| 2248 jni_Get##Result##ArrayElements(JNIEnv *env, ElementType##Array array, jboolean *isCopy)) \ | |
| 2249 JNIWrapper("Get" XSTR(Result) "ArrayElements"); \ | |
| 2250 DTRACE_PROBE3(hotspot_jni, Get##Result##ArrayElements__entry, env, array, isCopy);\ | |
| 2251 /* allocate an chunk of memory in c land */ \ | |
| 2252 typeArrayOop a = typeArrayOop(JNIHandles::resolve_non_null(array)); \ | |
| 2253 ElementType* result; \ | |
| 2254 int len = a->length(); \ | |
| 2255 if (len == 0) { \ | |
| 2256 /* Empty array: legal but useless, can't return NULL. \ | |
| 2257 * Return a pointer to something useless. \ | |
| 2258 * Avoid asserts in typeArrayOop. */ \ | |
| 2259 result = (ElementType*)get_bad_address(); \ | |
| 2260 } else { \ | |
| 2261 result = NEW_C_HEAP_ARRAY(ElementType, len); \ | |
| 2262 /* copy the array to the c chunk */ \ | |
| 2263 memcpy(result, a->Tag##_at_addr(0), sizeof(ElementType)*len); \ | |
| 2264 } \ | |
| 2265 if (isCopy) *isCopy = JNI_TRUE; \ | |
| 2266 DTRACE_PROBE1(hotspot_jni, Get##Result##ArrayElements__return, result);\ | |
| 2267 return result; \ | |
| 2268 JNI_END | |
| 2269 | |
| 2270 DEFINE_GETSCALARARRAYELEMENTS(T_BOOLEAN, jboolean, Boolean, bool) | |
| 2271 DEFINE_GETSCALARARRAYELEMENTS(T_BYTE, jbyte, Byte, byte) | |
| 2272 DEFINE_GETSCALARARRAYELEMENTS(T_SHORT, jshort, Short, short) | |
| 2273 DEFINE_GETSCALARARRAYELEMENTS(T_CHAR, jchar, Char, char) | |
| 2274 DEFINE_GETSCALARARRAYELEMENTS(T_INT, jint, Int, int) | |
| 2275 DEFINE_GETSCALARARRAYELEMENTS(T_LONG, jlong, Long, long) | |
| 2276 DEFINE_GETSCALARARRAYELEMENTS(T_FLOAT, jfloat, Float, float) | |
| 2277 DEFINE_GETSCALARARRAYELEMENTS(T_DOUBLE, jdouble, Double, double) | |
| 2278 | |
| 2279 | |
| 2280 #define DEFINE_RELEASESCALARARRAYELEMENTS(ElementTag,ElementType,Result,Tag) \ | |
| 2281 \ | |
| 2282 JNI_QUICK_ENTRY(void, \ | |
| 2283 jni_Release##Result##ArrayElements(JNIEnv *env, ElementType##Array array, \ | |
| 2284 ElementType *buf, jint mode)) \ | |
| 2285 JNIWrapper("Release" XSTR(Result) "ArrayElements"); \ | |
| 2286 DTRACE_PROBE4(hotspot_jni, Release##Result##ArrayElements__entry, env, array, buf, mode);\ | |
| 2287 typeArrayOop a = typeArrayOop(JNIHandles::resolve_non_null(array)); \ | |
| 2288 int len = a->length(); \ | |
| 2289 if (len != 0) { /* Empty array: nothing to free or copy. */ \ | |
| 2290 if ((mode == 0) || (mode == JNI_COMMIT)) { \ | |
| 2291 memcpy(a->Tag##_at_addr(0), buf, sizeof(ElementType)*len); \ | |
| 2292 } \ | |
| 2293 if ((mode == 0) || (mode == JNI_ABORT)) { \ | |
| 2294 FreeHeap(buf); \ | |
| 2295 } \ | |
| 2296 } \ | |
| 2297 DTRACE_PROBE(hotspot_jni, Release##Result##ArrayElements__return);\ | |
| 2298 JNI_END | |
| 2299 | |
| 2300 DEFINE_RELEASESCALARARRAYELEMENTS(T_BOOLEAN, jboolean, Boolean, bool) | |
| 2301 DEFINE_RELEASESCALARARRAYELEMENTS(T_BYTE, jbyte, Byte, byte) | |
| 2302 DEFINE_RELEASESCALARARRAYELEMENTS(T_SHORT, jshort, Short, short) | |
| 2303 DEFINE_RELEASESCALARARRAYELEMENTS(T_CHAR, jchar, Char, char) | |
| 2304 DEFINE_RELEASESCALARARRAYELEMENTS(T_INT, jint, Int, int) | |
| 2305 DEFINE_RELEASESCALARARRAYELEMENTS(T_LONG, jlong, Long, long) | |
| 2306 DEFINE_RELEASESCALARARRAYELEMENTS(T_FLOAT, jfloat, Float, float) | |
| 2307 DEFINE_RELEASESCALARARRAYELEMENTS(T_DOUBLE, jdouble, Double, double) | |
| 2308 | |
| 2309 #define DEFINE_GETSCALARARRAYREGION(ElementTag,ElementType,Result, Tag) \ | |
| 2310 DT_VOID_RETURN_MARK_DECL(Get##Result##ArrayRegion);\ | |
| 2311 \ | |
| 2312 JNI_ENTRY(void, \ | |
| 2313 jni_Get##Result##ArrayRegion(JNIEnv *env, ElementType##Array array, jsize start, \ | |
| 2314 jsize len, ElementType *buf)) \ | |
| 2315 JNIWrapper("Get" XSTR(Result) "ArrayRegion"); \ | |
| 2316 DTRACE_PROBE5(hotspot_jni, Get##Result##ArrayRegion__entry, env, array, start, len, buf);\ | |
| 2317 DT_VOID_RETURN_MARK(Get##Result##ArrayRegion); \ | |
| 2318 typeArrayOop src = typeArrayOop(JNIHandles::resolve_non_null(array)); \ | |
| 2319 if (start < 0 || len < 0 || ((unsigned int)start + (unsigned int)len > (unsigned int)src->length())) { \ | |
| 2320 THROW(vmSymbols::java_lang_ArrayIndexOutOfBoundsException()); \ | |
| 2321 } else { \ | |
| 2322 if (len > 0) { \ | |
| 2323 int sc = typeArrayKlass::cast(src->klass())->log2_element_size(); \ | |
| 2324 memcpy((u_char*) buf, \ | |
| 2325 (u_char*) src->Tag##_at_addr(start), \ | |
| 2326 len << sc); \ | |
| 2327 } \ | |
| 2328 } \ | |
| 2329 JNI_END | |
| 2330 | |
| 2331 DEFINE_GETSCALARARRAYREGION(T_BOOLEAN, jboolean,Boolean, bool) | |
| 2332 DEFINE_GETSCALARARRAYREGION(T_BYTE, jbyte, Byte, byte) | |
| 2333 DEFINE_GETSCALARARRAYREGION(T_SHORT, jshort, Short, short) | |
| 2334 DEFINE_GETSCALARARRAYREGION(T_CHAR, jchar, Char, char) | |
| 2335 DEFINE_GETSCALARARRAYREGION(T_INT, jint, Int, int) | |
| 2336 DEFINE_GETSCALARARRAYREGION(T_LONG, jlong, Long, long) | |
| 2337 DEFINE_GETSCALARARRAYREGION(T_FLOAT, jfloat, Float, float) | |
| 2338 DEFINE_GETSCALARARRAYREGION(T_DOUBLE, jdouble, Double, double) | |
| 2339 | |
| 2340 #define DEFINE_SETSCALARARRAYREGION(ElementTag,ElementType,Result, Tag) \ | |
| 2341 DT_VOID_RETURN_MARK_DECL(Set##Result##ArrayRegion);\ | |
| 2342 \ | |
| 2343 JNI_ENTRY(void, \ | |
| 2344 jni_Set##Result##ArrayRegion(JNIEnv *env, ElementType##Array array, jsize start, \ | |
| 2345 jsize len, const ElementType *buf)) \ | |
| 2346 JNIWrapper("Set" XSTR(Result) "ArrayRegion"); \ | |
| 2347 DTRACE_PROBE5(hotspot_jni, Set##Result##ArrayRegion__entry, env, array, start, len, buf);\ | |
| 2348 DT_VOID_RETURN_MARK(Set##Result##ArrayRegion); \ | |
| 2349 typeArrayOop dst = typeArrayOop(JNIHandles::resolve_non_null(array)); \ | |
| 2350 if (start < 0 || len < 0 || ((unsigned int)start + (unsigned int)len > (unsigned int)dst->length())) { \ | |
| 2351 THROW(vmSymbols::java_lang_ArrayIndexOutOfBoundsException()); \ | |
| 2352 } else { \ | |
| 2353 if (len > 0) { \ | |
| 2354 int sc = typeArrayKlass::cast(dst->klass())->log2_element_size(); \ | |
| 2355 memcpy((u_char*) dst->Tag##_at_addr(start), \ | |
| 2356 (u_char*) buf, \ | |
| 2357 len << sc); \ | |
| 2358 } \ | |
| 2359 } \ | |
| 2360 JNI_END | |
| 2361 | |
| 2362 DEFINE_SETSCALARARRAYREGION(T_BOOLEAN, jboolean, Boolean, bool) | |
| 2363 DEFINE_SETSCALARARRAYREGION(T_BYTE, jbyte, Byte, byte) | |
| 2364 DEFINE_SETSCALARARRAYREGION(T_SHORT, jshort, Short, short) | |
| 2365 DEFINE_SETSCALARARRAYREGION(T_CHAR, jchar, Char, char) | |
| 2366 DEFINE_SETSCALARARRAYREGION(T_INT, jint, Int, int) | |
| 2367 DEFINE_SETSCALARARRAYREGION(T_LONG, jlong, Long, long) | |
| 2368 DEFINE_SETSCALARARRAYREGION(T_FLOAT, jfloat, Float, float) | |
| 2369 DEFINE_SETSCALARARRAYREGION(T_DOUBLE, jdouble, Double, double) | |
| 2370 | |
| 2371 | |
| 2372 // | |
| 2373 // Interception of natives | |
| 2374 // | |
| 2375 | |
| 2376 // The RegisterNatives call being attempted tried to register with a method that | |
| 2377 // is not native. Ask JVM TI what prefixes have been specified. Then check | |
| 2378 // to see if the native method is now wrapped with the prefixes. See the | |
| 2379 // SetNativeMethodPrefix(es) functions in the JVM TI Spec for details. | |
| 2380 static methodOop find_prefixed_native(KlassHandle k, | |
|
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2381 Symbol* name, Symbol* signature, TRAPS) { |
| 0 | 2382 ResourceMark rm(THREAD); |
| 2383 methodOop method; | |
| 2384 int name_len = name->utf8_length(); | |
| 2385 char* name_str = name->as_utf8(); | |
| 2386 int prefix_count; | |
| 2387 char** prefixes = JvmtiExport::get_all_native_method_prefixes(&prefix_count); | |
| 2388 for (int i = 0; i < prefix_count; i++) { | |
| 2389 char* prefix = prefixes[i]; | |
| 2390 int prefix_len = (int)strlen(prefix); | |
| 2391 | |
| 2392 // try adding this prefix to the method name and see if it matches another method name | |
| 2393 int trial_len = name_len + prefix_len; | |
| 2394 char* trial_name_str = NEW_RESOURCE_ARRAY(char, trial_len + 1); | |
| 2395 strcpy(trial_name_str, prefix); | |
| 2396 strcat(trial_name_str, name_str); | |
|
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2397 TempNewSymbol trial_name = SymbolTable::probe(trial_name_str, trial_len); |
|
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2398 if (trial_name == NULL) { |
| 0 | 2399 continue; // no such symbol, so this prefix wasn't used, try the next prefix |
| 2400 } | |
|
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2401 method = Klass::cast(k())->lookup_method(trial_name, signature); |
| 0 | 2402 if (method == NULL) { |
| 2403 continue; // signature doesn't match, try the next prefix | |
| 2404 } | |
| 2405 if (method->is_native()) { | |
| 2406 method->set_is_prefixed_native(); | |
| 2407 return method; // wahoo, we found a prefixed version of the method, return it | |
| 2408 } | |
| 2409 // found as non-native, so prefix is good, add it, probably just need more prefixes | |
| 2410 name_len = trial_len; | |
| 2411 name_str = trial_name_str; | |
| 2412 } | |
| 2413 return NULL; // not found | |
| 2414 } | |
| 2415 | |
|
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2416 static bool register_native(KlassHandle k, Symbol* name, Symbol* signature, address entry, TRAPS) { |
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2417 methodOop method = Klass::cast(k())->lookup_method(name, signature); |
| 0 | 2418 if (method == NULL) { |
| 2419 ResourceMark rm; | |
| 2420 stringStream st; | |
| 2421 st.print("Method %s name or signature does not match", | |
|
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2422 methodOopDesc::name_and_sig_as_C_string(Klass::cast(k()), name, signature)); |
| 0 | 2423 THROW_MSG_(vmSymbols::java_lang_NoSuchMethodError(), st.as_string(), false); |
| 2424 } | |
| 2425 if (!method->is_native()) { | |
| 2426 // trying to register to a non-native method, see if a JVM TI agent has added prefix(es) | |
| 2427 method = find_prefixed_native(k, name, signature, THREAD); | |
| 2428 if (method == NULL) { | |
| 2429 ResourceMark rm; | |
| 2430 stringStream st; | |
| 2431 st.print("Method %s is not declared as native", | |
|
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2432 methodOopDesc::name_and_sig_as_C_string(Klass::cast(k()), name, signature)); |
| 0 | 2433 THROW_MSG_(vmSymbols::java_lang_NoSuchMethodError(), st.as_string(), false); |
| 2434 } | |
| 2435 } | |
| 2436 | |
| 2437 if (entry != NULL) { | |
| 2438 method->set_native_function(entry, | |
| 2439 methodOopDesc::native_bind_event_is_interesting); | |
| 2440 } else { | |
| 2441 method->clear_native_function(); | |
| 2442 } | |
| 2443 if (PrintJNIResolving) { | |
| 2444 ResourceMark rm(THREAD); | |
| 2445 tty->print_cr("[Registering JNI native method %s.%s]", | |
| 2446 Klass::cast(method->method_holder())->external_name(), | |
| 2447 method->name()->as_C_string()); | |
| 2448 } | |
| 2449 return true; | |
| 2450 } | |
| 2451 | |
| 2452 DT_RETURN_MARK_DECL(RegisterNatives, jint); | |
| 2453 | |
| 2454 JNI_ENTRY(jint, jni_RegisterNatives(JNIEnv *env, jclass clazz, | |
| 2455 const JNINativeMethod *methods, | |
| 2456 jint nMethods)) | |
| 2457 JNIWrapper("RegisterNatives"); | |
| 2458 DTRACE_PROBE4(hotspot_jni, RegisterNatives__entry, env, clazz, methods, nMethods); | |
| 2459 jint ret = 0; | |
| 2460 DT_RETURN_MARK(RegisterNatives, jint, (const jint&)ret); | |
| 2461 | |
| 2462 KlassHandle h_k(thread, java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(clazz))); | |
| 2463 | |
| 2464 for (int index = 0; index < nMethods; index++) { | |
| 2465 const char* meth_name = methods[index].name; | |
| 2466 const char* meth_sig = methods[index].signature; | |
| 2467 int meth_name_len = (int)strlen(meth_name); | |
| 2468 | |
| 2469 // The class should have been loaded (we have an instance of the class | |
| 2470 // passed in) so the method and signature should already be in the symbol | |
| 2471 // table. If they're not there, the method doesn't exist. | |
|
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|
2472 TempNewSymbol name = SymbolTable::probe(meth_name, meth_name_len); |
|
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|
2473 TempNewSymbol signature = SymbolTable::probe(meth_sig, (int)strlen(meth_sig)); |
|
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|
2474 |
|
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|
2475 if (name == NULL || signature == NULL) { |
| 0 | 2476 ResourceMark rm; |
| 2477 stringStream st; | |
| 2478 st.print("Method %s.%s%s not found", Klass::cast(h_k())->external_name(), meth_name, meth_sig); | |
| 2479 // Must return negative value on failure | |
| 2480 THROW_MSG_(vmSymbols::java_lang_NoSuchMethodError(), st.as_string(), -1); | |
| 2481 } | |
| 2482 | |
| 2483 bool res = register_native(h_k, name, signature, | |
| 2484 (address) methods[index].fnPtr, THREAD); | |
| 2485 if (!res) { | |
| 2486 ret = -1; | |
| 2487 break; | |
| 2488 } | |
| 2489 } | |
| 2490 return ret; | |
| 2491 JNI_END | |
| 2492 | |
| 2493 | |
| 2494 JNI_ENTRY(jint, jni_UnregisterNatives(JNIEnv *env, jclass clazz)) | |
| 2495 JNIWrapper("UnregisterNatives"); | |
| 2496 DTRACE_PROBE2(hotspot_jni, UnregisterNatives__entry, env, clazz); | |
| 2497 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(clazz)); | |
| 2498 //%note jni_2 | |
| 2499 if (Klass::cast(k)->oop_is_instance()) { | |
| 2500 for (int index = 0; index < instanceKlass::cast(k)->methods()->length(); index++) { | |
| 2501 methodOop m = methodOop(instanceKlass::cast(k)->methods()->obj_at(index)); | |
| 2502 if (m->is_native()) { | |
| 2503 m->clear_native_function(); | |
| 2504 m->set_signature_handler(NULL); | |
| 2505 } | |
| 2506 } | |
| 2507 } | |
| 2508 DTRACE_PROBE1(hotspot_jni, UnregisterNatives__return, 0); | |
| 2509 return 0; | |
| 2510 JNI_END | |
| 2511 | |
| 2512 // | |
| 2513 // Monitor functions | |
| 2514 // | |
| 2515 | |
| 2516 DT_RETURN_MARK_DECL(MonitorEnter, jint); | |
| 2517 | |
| 2518 JNI_ENTRY(jint, jni_MonitorEnter(JNIEnv *env, jobject jobj)) | |
| 2519 DTRACE_PROBE2(hotspot_jni, MonitorEnter__entry, env, jobj); | |
| 2520 jint ret = JNI_ERR; | |
| 2521 DT_RETURN_MARK(MonitorEnter, jint, (const jint&)ret); | |
| 2522 | |
| 2523 // If the object is null, we can't do anything with it | |
| 2524 if (jobj == NULL) { | |
| 2525 THROW_(vmSymbols::java_lang_NullPointerException(), JNI_ERR); | |
| 2526 } | |
| 2527 | |
| 2528 Handle obj(thread, JNIHandles::resolve_non_null(jobj)); | |
| 2529 ObjectSynchronizer::jni_enter(obj, CHECK_(JNI_ERR)); | |
| 2530 ret = JNI_OK; | |
| 2531 return ret; | |
| 2532 JNI_END | |
| 2533 | |
| 2534 DT_RETURN_MARK_DECL(MonitorExit, jint); | |
| 2535 | |
| 2536 JNI_ENTRY(jint, jni_MonitorExit(JNIEnv *env, jobject jobj)) | |
| 2537 DTRACE_PROBE2(hotspot_jni, MonitorExit__entry, env, jobj); | |
| 2538 jint ret = JNI_ERR; | |
| 2539 DT_RETURN_MARK(MonitorExit, jint, (const jint&)ret); | |
| 2540 | |
| 2541 // Don't do anything with a null object | |
| 2542 if (jobj == NULL) { | |
| 2543 THROW_(vmSymbols::java_lang_NullPointerException(), JNI_ERR); | |
| 2544 } | |
| 2545 | |
| 2546 Handle obj(THREAD, JNIHandles::resolve_non_null(jobj)); | |
| 2547 ObjectSynchronizer::jni_exit(obj(), CHECK_(JNI_ERR)); | |
| 2548 | |
| 2549 ret = JNI_OK; | |
| 2550 return ret; | |
| 2551 JNI_END | |
| 2552 | |
| 2553 // | |
| 2554 // Extensions | |
| 2555 // | |
| 2556 | |
| 2557 DT_VOID_RETURN_MARK_DECL(GetStringRegion); | |
| 2558 | |
| 2559 JNI_ENTRY(void, jni_GetStringRegion(JNIEnv *env, jstring string, jsize start, jsize len, jchar *buf)) | |
| 2560 JNIWrapper("GetStringRegion"); | |
| 2561 DTRACE_PROBE5(hotspot_jni, GetStringRegion__entry, env, string, start, len, buf); | |
| 2562 DT_VOID_RETURN_MARK(GetStringRegion); | |
| 2563 oop s = JNIHandles::resolve_non_null(string); | |
| 2564 int s_len = java_lang_String::length(s); | |
| 2565 if (start < 0 || len < 0 || start + len > s_len) { | |
| 2566 THROW(vmSymbols::java_lang_StringIndexOutOfBoundsException()); | |
| 2567 } else { | |
| 2568 if (len > 0) { | |
| 2569 int s_offset = java_lang_String::offset(s); | |
| 2570 typeArrayOop s_value = java_lang_String::value(s); | |
| 2571 memcpy(buf, s_value->char_at_addr(s_offset+start), sizeof(jchar)*len); | |
| 2572 } | |
| 2573 } | |
| 2574 JNI_END | |
| 2575 | |
| 2576 DT_VOID_RETURN_MARK_DECL(GetStringUTFRegion); | |
| 2577 | |
| 2578 JNI_ENTRY(void, jni_GetStringUTFRegion(JNIEnv *env, jstring string, jsize start, jsize len, char *buf)) | |
| 2579 JNIWrapper("GetStringUTFRegion"); | |
| 2580 DTRACE_PROBE5(hotspot_jni, GetStringUTFRegion__entry, env, string, start, len, buf); | |
| 2581 DT_VOID_RETURN_MARK(GetStringUTFRegion); | |
| 2582 oop s = JNIHandles::resolve_non_null(string); | |
| 2583 int s_len = java_lang_String::length(s); | |
| 2584 if (start < 0 || len < 0 || start + len > s_len) { | |
| 2585 THROW(vmSymbols::java_lang_StringIndexOutOfBoundsException()); | |
| 2586 } else { | |
| 2587 //%note jni_7 | |
| 2588 if (len > 0) { | |
| 2589 ResourceMark rm(THREAD); | |
| 2590 char *utf_region = java_lang_String::as_utf8_string(s, start, len); | |
| 2591 int utf_len = (int)strlen(utf_region); | |
| 2592 memcpy(buf, utf_region, utf_len); | |
| 2593 buf[utf_len] = 0; | |
| 2594 } else { | |
| 2595 // JDK null-terminates the buffer even in len is zero | |
| 2596 if (buf != NULL) { | |
| 2597 buf[0] = 0; | |
| 2598 } | |
| 2599 } | |
| 2600 } | |
| 2601 JNI_END | |
| 2602 | |
| 2603 | |
| 2604 JNI_ENTRY(void*, jni_GetPrimitiveArrayCritical(JNIEnv *env, jarray array, jboolean *isCopy)) | |
| 2605 JNIWrapper("GetPrimitiveArrayCritical"); | |
| 2606 DTRACE_PROBE3(hotspot_jni, GetPrimitiveArrayCritical__entry, env, array, isCopy); | |
| 2607 GC_locker::lock_critical(thread); | |
| 2608 if (isCopy != NULL) { | |
| 2609 *isCopy = JNI_FALSE; | |
| 2610 } | |
| 2611 oop a = JNIHandles::resolve_non_null(array); | |
| 2612 assert(a->is_array(), "just checking"); | |
| 2613 BasicType type; | |
| 2614 if (a->is_objArray()) { | |
| 2615 type = T_OBJECT; | |
| 2616 } else { | |
| 2617 type = typeArrayKlass::cast(a->klass())->element_type(); | |
| 2618 } | |
| 2619 void* ret = arrayOop(a)->base(type); | |
| 2620 DTRACE_PROBE1(hotspot_jni, GetPrimitiveArrayCritical__return, ret); | |
| 2621 return ret; | |
| 2622 JNI_END | |
| 2623 | |
| 2624 | |
| 2625 JNI_ENTRY(void, jni_ReleasePrimitiveArrayCritical(JNIEnv *env, jarray array, void *carray, jint mode)) | |
| 2626 JNIWrapper("ReleasePrimitiveArrayCritical"); | |
| 2627 DTRACE_PROBE4(hotspot_jni, ReleasePrimitiveArrayCritical__entry, env, array, carray, mode); | |
| 2628 // The array, carray and mode arguments are ignored | |
| 2629 GC_locker::unlock_critical(thread); | |
| 2630 DTRACE_PROBE(hotspot_jni, ReleasePrimitiveArrayCritical__return); | |
| 2631 JNI_END | |
| 2632 | |
| 2633 | |
| 2634 JNI_ENTRY(const jchar*, jni_GetStringCritical(JNIEnv *env, jstring string, jboolean *isCopy)) | |
| 2635 JNIWrapper("GetStringCritical"); | |
| 2636 DTRACE_PROBE3(hotspot_jni, GetStringCritical__entry, env, string, isCopy); | |
| 2637 GC_locker::lock_critical(thread); | |
| 2638 if (isCopy != NULL) { | |
| 2639 *isCopy = JNI_FALSE; | |
| 2640 } | |
| 2641 oop s = JNIHandles::resolve_non_null(string); | |
| 2642 int s_len = java_lang_String::length(s); | |
| 2643 typeArrayOop s_value = java_lang_String::value(s); | |
| 2644 int s_offset = java_lang_String::offset(s); | |
| 2645 const jchar* ret; | |
| 2646 if (s_len > 0) { | |
| 2647 ret = s_value->char_at_addr(s_offset); | |
| 2648 } else { | |
| 2649 ret = (jchar*) s_value->base(T_CHAR); | |
| 2650 } | |
| 2651 DTRACE_PROBE1(hotspot_jni, GetStringCritical__return, ret); | |
| 2652 return ret; | |
| 2653 JNI_END | |
| 2654 | |
| 2655 | |
| 2656 JNI_ENTRY(void, jni_ReleaseStringCritical(JNIEnv *env, jstring str, const jchar *chars)) | |
| 2657 JNIWrapper("ReleaseStringCritical"); | |
| 2658 DTRACE_PROBE3(hotspot_jni, ReleaseStringCritical__entry, env, str, chars); | |
| 2659 // The str and chars arguments are ignored | |
| 2660 GC_locker::unlock_critical(thread); | |
| 2661 DTRACE_PROBE(hotspot_jni, ReleaseStringCritical__return); | |
| 2662 JNI_END | |
| 2663 | |
| 2664 | |
| 2665 JNI_ENTRY(jweak, jni_NewWeakGlobalRef(JNIEnv *env, jobject ref)) | |
| 2666 JNIWrapper("jni_NewWeakGlobalRef"); | |
| 2667 DTRACE_PROBE2(hotspot_jni, NewWeakGlobalRef__entry, env, ref); | |
| 2668 Handle ref_handle(thread, JNIHandles::resolve(ref)); | |
| 2669 jweak ret = JNIHandles::make_weak_global(ref_handle); | |
| 2670 DTRACE_PROBE1(hotspot_jni, NewWeakGlobalRef__return, ret); | |
| 2671 return ret; | |
| 2672 JNI_END | |
| 2673 | |
| 2674 // Must be JNI_ENTRY (with HandleMark) | |
| 2675 JNI_ENTRY(void, jni_DeleteWeakGlobalRef(JNIEnv *env, jweak ref)) | |
| 2676 JNIWrapper("jni_DeleteWeakGlobalRef"); | |
| 2677 DTRACE_PROBE2(hotspot_jni, DeleteWeakGlobalRef__entry, env, ref); | |
| 2678 JNIHandles::destroy_weak_global(ref); | |
| 2679 DTRACE_PROBE(hotspot_jni, DeleteWeakGlobalRef__return); | |
| 2680 JNI_END | |
| 2681 | |
| 2682 | |
| 2683 JNI_QUICK_ENTRY(jboolean, jni_ExceptionCheck(JNIEnv *env)) | |
| 2684 JNIWrapper("jni_ExceptionCheck"); | |
| 2685 DTRACE_PROBE1(hotspot_jni, ExceptionCheck__entry, env); | |
| 2686 jni_check_async_exceptions(thread); | |
| 2687 jboolean ret = (thread->has_pending_exception()) ? JNI_TRUE : JNI_FALSE; | |
| 2688 DTRACE_PROBE1(hotspot_jni, ExceptionCheck__return, ret); | |
| 2689 return ret; | |
| 2690 JNI_END | |
| 2691 | |
| 2692 | |
| 2693 // Initialization state for three routines below relating to | |
| 2694 // java.nio.DirectBuffers | |
| 2695 static jint directBufferSupportInitializeStarted = 0; | |
| 2696 static volatile jint directBufferSupportInitializeEnded = 0; | |
| 2697 static volatile jint directBufferSupportInitializeFailed = 0; | |
| 2698 static jclass bufferClass = NULL; | |
| 2699 static jclass directBufferClass = NULL; | |
| 2700 static jclass directByteBufferClass = NULL; | |
| 2701 static jmethodID directByteBufferConstructor = NULL; | |
| 2702 static jfieldID directBufferAddressField = NULL; | |
| 2703 static jfieldID bufferCapacityField = NULL; | |
| 2704 | |
| 2705 static jclass lookupOne(JNIEnv* env, const char* name, TRAPS) { | |
| 2706 Handle loader; // null (bootstrap) loader | |
| 2707 Handle protection_domain; // null protection domain | |
| 2708 | |
|
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2709 TempNewSymbol sym = SymbolTable::new_symbol(name, CHECK_NULL); |
|
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|
2710 jclass result = find_class_from_class_loader(env, sym, true, loader, protection_domain, true, CHECK_NULL); |
|
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|
2711 |
|
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diff
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|
2712 if (TraceClassResolution && result != NULL) { |
|
715dceaa89b7
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|
2713 trace_class_resolution(java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(result))); |
|
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|
2714 } |
|
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|
2715 return result; |
| 0 | 2716 } |
| 2717 | |
| 2718 // These lookups are done with the NULL (bootstrap) ClassLoader to | |
| 2719 // circumvent any security checks that would be done by jni_FindClass. | |
| 2720 JNI_ENTRY(bool, lookupDirectBufferClasses(JNIEnv* env)) | |
| 2721 { | |
| 2722 if ((bufferClass = lookupOne(env, "java/nio/Buffer", thread)) == NULL) { return false; } | |
| 2723 if ((directBufferClass = lookupOne(env, "sun/nio/ch/DirectBuffer", thread)) == NULL) { return false; } | |
| 2724 if ((directByteBufferClass = lookupOne(env, "java/nio/DirectByteBuffer", thread)) == NULL) { return false; } | |
| 2725 return true; | |
| 2726 } | |
| 2727 JNI_END | |
| 2728 | |
| 2729 | |
| 2730 static bool initializeDirectBufferSupport(JNIEnv* env, JavaThread* thread) { | |
| 2731 if (directBufferSupportInitializeFailed) { | |
| 2732 return false; | |
| 2733 } | |
| 2734 | |
| 2735 if (Atomic::cmpxchg(1, &directBufferSupportInitializeStarted, 0) == 0) { | |
| 2736 if (!lookupDirectBufferClasses(env)) { | |
| 2737 directBufferSupportInitializeFailed = 1; | |
| 2738 return false; | |
| 2739 } | |
| 2740 | |
| 2741 // Make global references for these | |
| 2742 bufferClass = (jclass) env->NewGlobalRef(bufferClass); | |
| 2743 directBufferClass = (jclass) env->NewGlobalRef(directBufferClass); | |
| 2744 directByteBufferClass = (jclass) env->NewGlobalRef(directByteBufferClass); | |
| 2745 | |
| 2746 // Get needed field and method IDs | |
| 2747 directByteBufferConstructor = env->GetMethodID(directByteBufferClass, "<init>", "(JI)V"); | |
| 2748 directBufferAddressField = env->GetFieldID(bufferClass, "address", "J"); | |
| 2749 bufferCapacityField = env->GetFieldID(bufferClass, "capacity", "I"); | |
| 2750 | |
| 2751 if ((directByteBufferConstructor == NULL) || | |
| 2752 (directBufferAddressField == NULL) || | |
| 2753 (bufferCapacityField == NULL)) { | |
| 2754 directBufferSupportInitializeFailed = 1; | |
| 2755 return false; | |
| 2756 } | |
| 2757 | |
| 2758 directBufferSupportInitializeEnded = 1; | |
| 2759 } else { | |
| 2760 while (!directBufferSupportInitializeEnded && !directBufferSupportInitializeFailed) { | |
|
521
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diff
changeset
|
2761 // Set state as yield_all can call os:sleep. On Solaris, yield_all calls |
|
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diff
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|
2762 // 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
|
2763 // 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
|
2764 // 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
|
2765 // 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
|
2766 ThreadInVMfromNative tivn(thread); |
| 0 | 2767 os::yield_all(); |
| 2768 } | |
| 2769 } | |
| 2770 | |
| 2771 return !directBufferSupportInitializeFailed; | |
| 2772 } | |
| 2773 | |
| 2774 extern "C" jobject JNICALL jni_NewDirectByteBuffer(JNIEnv *env, void* address, jlong capacity) | |
| 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_NewDirectByteBuffer"); | |
| 2780 DTRACE_PROBE3(hotspot_jni, NewDirectByteBuffer__entry, env, address, capacity); | |
| 2781 | |
| 2782 if (!directBufferSupportInitializeEnded) { | |
| 2783 if (!initializeDirectBufferSupport(env, thread)) { | |
| 2784 DTRACE_PROBE1(hotspot_jni, NewDirectByteBuffer__return, NULL); | |
| 2785 return NULL; | |
| 2786 } | |
| 2787 } | |
| 2788 | |
| 2789 // Being paranoid about accidental sign extension on address | |
| 2790 jlong addr = (jlong) ((uintptr_t) address); | |
| 2791 // NOTE that package-private DirectByteBuffer constructor currently | |
| 2792 // takes int capacity | |
| 2793 jint cap = (jint) capacity; | |
| 2794 jobject ret = env->NewObject(directByteBufferClass, directByteBufferConstructor, addr, cap); | |
| 2795 DTRACE_PROBE1(hotspot_jni, NewDirectByteBuffer__return, ret); | |
| 2796 return ret; | |
| 2797 } | |
| 2798 | |
| 2799 DT_RETURN_MARK_DECL(GetDirectBufferAddress, void*); | |
| 2800 | |
| 2801 extern "C" void* JNICALL jni_GetDirectBufferAddress(JNIEnv *env, jobject buf) | |
| 2802 { | |
| 2803 // thread_from_jni_environment() will block if VM is gone. | |
| 2804 JavaThread* thread = JavaThread::thread_from_jni_environment(env); | |
| 2805 | |
| 2806 JNIWrapper("jni_GetDirectBufferAddress"); | |
| 2807 DTRACE_PROBE2(hotspot_jni, GetDirectBufferAddress__entry, env, buf); | |
| 2808 void* ret = NULL; | |
| 2809 DT_RETURN_MARK(GetDirectBufferAddress, void*, (const void*&)ret); | |
| 2810 | |
| 2811 if (!directBufferSupportInitializeEnded) { | |
| 2812 if (!initializeDirectBufferSupport(env, thread)) { | |
| 2813 return 0; | |
| 2814 } | |
| 2815 } | |
| 2816 | |
| 2817 if ((buf != NULL) && (!env->IsInstanceOf(buf, directBufferClass))) { | |
| 2818 return 0; | |
| 2819 } | |
| 2820 | |
| 2821 ret = (void*)(intptr_t)env->GetLongField(buf, directBufferAddressField); | |
| 2822 return ret; | |
| 2823 } | |
| 2824 | |
| 2825 DT_RETURN_MARK_DECL(GetDirectBufferCapacity, jlong); | |
| 2826 | |
| 2827 extern "C" jlong JNICALL jni_GetDirectBufferCapacity(JNIEnv *env, jobject buf) | |
| 2828 { | |
| 2829 // thread_from_jni_environment() will block if VM is gone. | |
| 2830 JavaThread* thread = JavaThread::thread_from_jni_environment(env); | |
| 2831 | |
| 2832 JNIWrapper("jni_GetDirectBufferCapacity"); | |
| 2833 DTRACE_PROBE2(hotspot_jni, GetDirectBufferCapacity__entry, env, buf); | |
| 2834 jlong ret = -1; | |
| 2835 DT_RETURN_MARK(GetDirectBufferCapacity, jlong, (const jlong&)ret); | |
| 2836 | |
| 2837 if (!directBufferSupportInitializeEnded) { | |
| 2838 if (!initializeDirectBufferSupport(env, thread)) { | |
| 2839 ret = 0; | |
| 2840 return ret; | |
| 2841 } | |
| 2842 } | |
| 2843 | |
| 2844 if (buf == NULL) { | |
| 2845 return -1; | |
| 2846 } | |
| 2847 | |
| 2848 if (!env->IsInstanceOf(buf, directBufferClass)) { | |
| 2849 return -1; | |
| 2850 } | |
| 2851 | |
| 2852 // NOTE that capacity is currently an int in the implementation | |
| 2853 ret = env->GetIntField(buf, bufferCapacityField); | |
| 2854 return ret; | |
| 2855 } | |
| 2856 | |
| 2857 | |
| 2858 JNI_LEAF(jint, jni_GetVersion(JNIEnv *env)) | |
| 2859 JNIWrapper("GetVersion"); | |
| 2860 DTRACE_PROBE1(hotspot_jni, GetVersion__entry, env); | |
| 2861 DTRACE_PROBE1(hotspot_jni, GetVersion__return, CurrentVersion); | |
| 2862 return CurrentVersion; | |
| 2863 JNI_END | |
| 2864 | |
| 2865 extern struct JavaVM_ main_vm; | |
| 2866 | |
| 2867 JNI_LEAF(jint, jni_GetJavaVM(JNIEnv *env, JavaVM **vm)) | |
| 2868 JNIWrapper("jni_GetJavaVM"); | |
| 2869 DTRACE_PROBE2(hotspot_jni, GetJavaVM__entry, env, vm); | |
| 2870 *vm = (JavaVM *)(&main_vm); | |
| 2871 DTRACE_PROBE1(hotspot_jni, GetJavaVM__return, JNI_OK); | |
| 2872 return JNI_OK; | |
| 2873 JNI_END | |
| 2874 | |
| 2875 // Structure containing all jni functions | |
| 2876 struct JNINativeInterface_ jni_NativeInterface = { | |
| 2877 NULL, | |
| 2878 NULL, | |
| 2879 NULL, | |
| 2880 | |
| 2881 NULL, | |
| 2882 | |
| 2883 jni_GetVersion, | |
| 2884 | |
| 2885 jni_DefineClass, | |
| 2886 jni_FindClass, | |
| 2887 | |
| 2888 jni_FromReflectedMethod, | |
| 2889 jni_FromReflectedField, | |
| 2890 | |
| 2891 jni_ToReflectedMethod, | |
| 2892 | |
| 2893 jni_GetSuperclass, | |
| 2894 jni_IsAssignableFrom, | |
| 2895 | |
| 2896 jni_ToReflectedField, | |
| 2897 | |
| 2898 jni_Throw, | |
| 2899 jni_ThrowNew, | |
| 2900 jni_ExceptionOccurred, | |
| 2901 jni_ExceptionDescribe, | |
| 2902 jni_ExceptionClear, | |
| 2903 jni_FatalError, | |
| 2904 | |
| 2905 jni_PushLocalFrame, | |
| 2906 jni_PopLocalFrame, | |
| 2907 | |
| 2908 jni_NewGlobalRef, | |
| 2909 jni_DeleteGlobalRef, | |
| 2910 jni_DeleteLocalRef, | |
| 2911 jni_IsSameObject, | |
| 2912 | |
| 2913 jni_NewLocalRef, | |
| 2914 jni_EnsureLocalCapacity, | |
| 2915 | |
| 2916 jni_AllocObject, | |
| 2917 jni_NewObject, | |
| 2918 jni_NewObjectV, | |
| 2919 jni_NewObjectA, | |
| 2920 | |
| 2921 jni_GetObjectClass, | |
| 2922 jni_IsInstanceOf, | |
| 2923 | |
| 2924 jni_GetMethodID, | |
| 2925 | |
| 2926 jni_CallObjectMethod, | |
| 2927 jni_CallObjectMethodV, | |
| 2928 jni_CallObjectMethodA, | |
| 2929 jni_CallBooleanMethod, | |
| 2930 jni_CallBooleanMethodV, | |
| 2931 jni_CallBooleanMethodA, | |
| 2932 jni_CallByteMethod, | |
| 2933 jni_CallByteMethodV, | |
| 2934 jni_CallByteMethodA, | |
| 2935 jni_CallCharMethod, | |
| 2936 jni_CallCharMethodV, | |
| 2937 jni_CallCharMethodA, | |
| 2938 jni_CallShortMethod, | |
| 2939 jni_CallShortMethodV, | |
| 2940 jni_CallShortMethodA, | |
| 2941 jni_CallIntMethod, | |
| 2942 jni_CallIntMethodV, | |
| 2943 jni_CallIntMethodA, | |
| 2944 jni_CallLongMethod, | |
| 2945 jni_CallLongMethodV, | |
| 2946 jni_CallLongMethodA, | |
| 2947 jni_CallFloatMethod, | |
| 2948 jni_CallFloatMethodV, | |
| 2949 jni_CallFloatMethodA, | |
| 2950 jni_CallDoubleMethod, | |
| 2951 jni_CallDoubleMethodV, | |
| 2952 jni_CallDoubleMethodA, | |
| 2953 jni_CallVoidMethod, | |
| 2954 jni_CallVoidMethodV, | |
| 2955 jni_CallVoidMethodA, | |
| 2956 | |
| 2957 jni_CallNonvirtualObjectMethod, | |
| 2958 jni_CallNonvirtualObjectMethodV, | |
| 2959 jni_CallNonvirtualObjectMethodA, | |
| 2960 jni_CallNonvirtualBooleanMethod, | |
| 2961 jni_CallNonvirtualBooleanMethodV, | |
| 2962 jni_CallNonvirtualBooleanMethodA, | |
| 2963 jni_CallNonvirtualByteMethod, | |
| 2964 jni_CallNonvirtualByteMethodV, | |
| 2965 jni_CallNonvirtualByteMethodA, | |
| 2966 jni_CallNonvirtualCharMethod, | |
| 2967 jni_CallNonvirtualCharMethodV, | |
| 2968 jni_CallNonvirtualCharMethodA, | |
| 2969 jni_CallNonvirtualShortMethod, | |
| 2970 jni_CallNonvirtualShortMethodV, | |
| 2971 jni_CallNonvirtualShortMethodA, | |
| 2972 jni_CallNonvirtualIntMethod, | |
| 2973 jni_CallNonvirtualIntMethodV, | |
| 2974 jni_CallNonvirtualIntMethodA, | |
| 2975 jni_CallNonvirtualLongMethod, | |
| 2976 jni_CallNonvirtualLongMethodV, | |
| 2977 jni_CallNonvirtualLongMethodA, | |
| 2978 jni_CallNonvirtualFloatMethod, | |
| 2979 jni_CallNonvirtualFloatMethodV, | |
| 2980 jni_CallNonvirtualFloatMethodA, | |
| 2981 jni_CallNonvirtualDoubleMethod, | |
| 2982 jni_CallNonvirtualDoubleMethodV, | |
| 2983 jni_CallNonvirtualDoubleMethodA, | |
| 2984 jni_CallNonvirtualVoidMethod, | |
| 2985 jni_CallNonvirtualVoidMethodV, | |
| 2986 jni_CallNonvirtualVoidMethodA, | |
| 2987 | |
| 2988 jni_GetFieldID, | |
| 2989 | |
| 2990 jni_GetObjectField, | |
| 2991 jni_GetBooleanField, | |
| 2992 jni_GetByteField, | |
| 2993 jni_GetCharField, | |
| 2994 jni_GetShortField, | |
| 2995 jni_GetIntField, | |
| 2996 jni_GetLongField, | |
| 2997 jni_GetFloatField, | |
| 2998 jni_GetDoubleField, | |
| 2999 | |
| 3000 jni_SetObjectField, | |
| 3001 jni_SetBooleanField, | |
| 3002 jni_SetByteField, | |
| 3003 jni_SetCharField, | |
| 3004 jni_SetShortField, | |
| 3005 jni_SetIntField, | |
| 3006 jni_SetLongField, | |
| 3007 jni_SetFloatField, | |
| 3008 jni_SetDoubleField, | |
| 3009 | |
| 3010 jni_GetStaticMethodID, | |
| 3011 | |
| 3012 jni_CallStaticObjectMethod, | |
| 3013 jni_CallStaticObjectMethodV, | |
| 3014 jni_CallStaticObjectMethodA, | |
| 3015 jni_CallStaticBooleanMethod, | |
| 3016 jni_CallStaticBooleanMethodV, | |
| 3017 jni_CallStaticBooleanMethodA, | |
| 3018 jni_CallStaticByteMethod, | |
| 3019 jni_CallStaticByteMethodV, | |
| 3020 jni_CallStaticByteMethodA, | |
| 3021 jni_CallStaticCharMethod, | |
| 3022 jni_CallStaticCharMethodV, | |
| 3023 jni_CallStaticCharMethodA, | |
| 3024 jni_CallStaticShortMethod, | |
| 3025 jni_CallStaticShortMethodV, | |
| 3026 jni_CallStaticShortMethodA, | |
| 3027 jni_CallStaticIntMethod, | |
| 3028 jni_CallStaticIntMethodV, | |
| 3029 jni_CallStaticIntMethodA, | |
| 3030 jni_CallStaticLongMethod, | |
| 3031 jni_CallStaticLongMethodV, | |
| 3032 jni_CallStaticLongMethodA, | |
| 3033 jni_CallStaticFloatMethod, | |
| 3034 jni_CallStaticFloatMethodV, | |
| 3035 jni_CallStaticFloatMethodA, | |
| 3036 jni_CallStaticDoubleMethod, | |
| 3037 jni_CallStaticDoubleMethodV, | |
| 3038 jni_CallStaticDoubleMethodA, | |
| 3039 jni_CallStaticVoidMethod, | |
| 3040 jni_CallStaticVoidMethodV, | |
| 3041 jni_CallStaticVoidMethodA, | |
| 3042 | |
| 3043 jni_GetStaticFieldID, | |
| 3044 | |
| 3045 jni_GetStaticObjectField, | |
| 3046 jni_GetStaticBooleanField, | |
| 3047 jni_GetStaticByteField, | |
| 3048 jni_GetStaticCharField, | |
| 3049 jni_GetStaticShortField, | |
| 3050 jni_GetStaticIntField, | |
| 3051 jni_GetStaticLongField, | |
| 3052 jni_GetStaticFloatField, | |
| 3053 jni_GetStaticDoubleField, | |
| 3054 | |
| 3055 jni_SetStaticObjectField, | |
| 3056 jni_SetStaticBooleanField, | |
| 3057 jni_SetStaticByteField, | |
| 3058 jni_SetStaticCharField, | |
| 3059 jni_SetStaticShortField, | |
| 3060 jni_SetStaticIntField, | |
| 3061 jni_SetStaticLongField, | |
| 3062 jni_SetStaticFloatField, | |
| 3063 jni_SetStaticDoubleField, | |
| 3064 | |
| 3065 jni_NewString, | |
| 3066 jni_GetStringLength, | |
| 3067 jni_GetStringChars, | |
| 3068 jni_ReleaseStringChars, | |
| 3069 | |
| 3070 jni_NewStringUTF, | |
| 3071 jni_GetStringUTFLength, | |
| 3072 jni_GetStringUTFChars, | |
| 3073 jni_ReleaseStringUTFChars, | |
| 3074 | |
| 3075 jni_GetArrayLength, | |
| 3076 | |
| 3077 jni_NewObjectArray, | |
| 3078 jni_GetObjectArrayElement, | |
| 3079 jni_SetObjectArrayElement, | |
| 3080 | |
| 3081 jni_NewBooleanArray, | |
| 3082 jni_NewByteArray, | |
| 3083 jni_NewCharArray, | |
| 3084 jni_NewShortArray, | |
| 3085 jni_NewIntArray, | |
| 3086 jni_NewLongArray, | |
| 3087 jni_NewFloatArray, | |
| 3088 jni_NewDoubleArray, | |
| 3089 | |
| 3090 jni_GetBooleanArrayElements, | |
| 3091 jni_GetByteArrayElements, | |
| 3092 jni_GetCharArrayElements, | |
| 3093 jni_GetShortArrayElements, | |
| 3094 jni_GetIntArrayElements, | |
| 3095 jni_GetLongArrayElements, | |
| 3096 jni_GetFloatArrayElements, | |
| 3097 jni_GetDoubleArrayElements, | |
| 3098 | |
| 3099 jni_ReleaseBooleanArrayElements, | |
| 3100 jni_ReleaseByteArrayElements, | |
| 3101 jni_ReleaseCharArrayElements, | |
| 3102 jni_ReleaseShortArrayElements, | |
| 3103 jni_ReleaseIntArrayElements, | |
| 3104 jni_ReleaseLongArrayElements, | |
| 3105 jni_ReleaseFloatArrayElements, | |
| 3106 jni_ReleaseDoubleArrayElements, | |
| 3107 | |
| 3108 jni_GetBooleanArrayRegion, | |
| 3109 jni_GetByteArrayRegion, | |
| 3110 jni_GetCharArrayRegion, | |
| 3111 jni_GetShortArrayRegion, | |
| 3112 jni_GetIntArrayRegion, | |
| 3113 jni_GetLongArrayRegion, | |
| 3114 jni_GetFloatArrayRegion, | |
| 3115 jni_GetDoubleArrayRegion, | |
| 3116 | |
| 3117 jni_SetBooleanArrayRegion, | |
| 3118 jni_SetByteArrayRegion, | |
| 3119 jni_SetCharArrayRegion, | |
| 3120 jni_SetShortArrayRegion, | |
| 3121 jni_SetIntArrayRegion, | |
| 3122 jni_SetLongArrayRegion, | |
| 3123 jni_SetFloatArrayRegion, | |
| 3124 jni_SetDoubleArrayRegion, | |
| 3125 | |
| 3126 jni_RegisterNatives, | |
| 3127 jni_UnregisterNatives, | |
| 3128 | |
| 3129 jni_MonitorEnter, | |
| 3130 jni_MonitorExit, | |
| 3131 | |
| 3132 jni_GetJavaVM, | |
| 3133 | |
| 3134 jni_GetStringRegion, | |
| 3135 jni_GetStringUTFRegion, | |
| 3136 | |
| 3137 jni_GetPrimitiveArrayCritical, | |
| 3138 jni_ReleasePrimitiveArrayCritical, | |
| 3139 | |
| 3140 jni_GetStringCritical, | |
| 3141 jni_ReleaseStringCritical, | |
| 3142 | |
| 3143 jni_NewWeakGlobalRef, | |
| 3144 jni_DeleteWeakGlobalRef, | |
| 3145 | |
| 3146 jni_ExceptionCheck, | |
| 3147 | |
| 3148 jni_NewDirectByteBuffer, | |
| 3149 jni_GetDirectBufferAddress, | |
| 3150 jni_GetDirectBufferCapacity, | |
| 3151 | |
| 3152 // New 1_6 features | |
| 3153 | |
| 3154 jni_GetObjectRefType | |
| 3155 }; | |
| 3156 | |
| 3157 | |
| 3158 // For jvmti use to modify jni function table. | |
| 3159 // Java threads in native contiues to run until it is transitioned | |
| 3160 // to VM at safepoint. Before the transition or before it is blocked | |
| 3161 // for safepoint it may access jni function table. VM could crash if | |
| 3162 // any java thread access the jni function table in the middle of memcpy. | |
| 3163 // To avoid this each function pointers are copied automically. | |
| 3164 void copy_jni_function_table(const struct JNINativeInterface_ *new_jni_NativeInterface) { | |
| 3165 assert(SafepointSynchronize::is_at_safepoint(), "must be at safepoint"); | |
| 3166 intptr_t *a = (intptr_t *) jni_functions(); | |
| 3167 intptr_t *b = (intptr_t *) new_jni_NativeInterface; | |
| 3168 for (uint i=0; i < sizeof(struct JNINativeInterface_)/sizeof(void *); i++) { | |
| 3169 Atomic::store_ptr(*b++, a++); | |
| 3170 } | |
| 3171 } | |
| 3172 | |
| 3173 void quicken_jni_functions() { | |
| 3174 // Replace Get<Primitive>Field with fast versions | |
| 3175 if (UseFastJNIAccessors && !JvmtiExport::can_post_field_access() | |
| 3176 && !VerifyJNIFields && !TraceJNICalls && !CountJNICalls && !CheckJNICalls | |
| 3177 #if defined(_WINDOWS) && defined(IA32) && defined(COMPILER2) | |
| 3178 // windows x86 currently needs SEH wrapper and the gain of the fast | |
| 3179 // versions currently isn't certain for server vm on uniprocessor. | |
| 3180 && os::is_MP() | |
| 3181 #endif | |
| 3182 ) { | |
| 3183 address func; | |
| 3184 func = JNI_FastGetField::generate_fast_get_boolean_field(); | |
| 3185 if (func != (address)-1) { | |
| 3186 jni_NativeInterface.GetBooleanField = (GetBooleanField_t)func; | |
| 3187 } | |
| 3188 func = JNI_FastGetField::generate_fast_get_byte_field(); | |
| 3189 if (func != (address)-1) { | |
| 3190 jni_NativeInterface.GetByteField = (GetByteField_t)func; | |
| 3191 } | |
| 3192 func = JNI_FastGetField::generate_fast_get_char_field(); | |
| 3193 if (func != (address)-1) { | |
| 3194 jni_NativeInterface.GetCharField = (GetCharField_t)func; | |
| 3195 } | |
| 3196 func = JNI_FastGetField::generate_fast_get_short_field(); | |
| 3197 if (func != (address)-1) { | |
| 3198 jni_NativeInterface.GetShortField = (GetShortField_t)func; | |
| 3199 } | |
| 3200 func = JNI_FastGetField::generate_fast_get_int_field(); | |
| 3201 if (func != (address)-1) { | |
| 3202 jni_NativeInterface.GetIntField = (GetIntField_t)func; | |
| 3203 } | |
| 3204 func = JNI_FastGetField::generate_fast_get_long_field(); | |
| 3205 if (func != (address)-1) { | |
| 3206 jni_NativeInterface.GetLongField = (GetLongField_t)func; | |
| 3207 } | |
| 3208 func = JNI_FastGetField::generate_fast_get_float_field(); | |
| 3209 if (func != (address)-1) { | |
| 3210 jni_NativeInterface.GetFloatField = (GetFloatField_t)func; | |
| 3211 } | |
| 3212 func = JNI_FastGetField::generate_fast_get_double_field(); | |
| 3213 if (func != (address)-1) { | |
| 3214 jni_NativeInterface.GetDoubleField = (GetDoubleField_t)func; | |
| 3215 } | |
| 3216 } | |
| 3217 } | |
| 3218 | |
| 3219 // Returns the function structure | |
| 3220 struct JNINativeInterface_* jni_functions() { | |
| 3221 #ifndef JNICHECK_KERNEL | |
| 3222 if (CheckJNICalls) return jni_functions_check(); | |
| 3223 #else // JNICHECK_KERNEL | |
| 3224 if (CheckJNICalls) warning("-Xcheck:jni is not supported in kernel vm."); | |
| 3225 #endif // JNICHECK_KERNEL | |
| 3226 return &jni_NativeInterface; | |
| 3227 } | |
| 3228 | |
| 3229 // Returns the function structure | |
| 3230 struct JNINativeInterface_* jni_functions_nocheck() { | |
| 3231 return &jni_NativeInterface; | |
| 3232 } | |
| 3233 | |
| 3234 | |
| 3235 // Invocation API | |
| 3236 | |
| 3237 | |
| 3238 // Forward declaration | |
| 3239 extern const struct JNIInvokeInterface_ jni_InvokeInterface; | |
| 3240 | |
| 3241 // Global invocation API vars | |
| 3242 volatile jint vm_created = 0; | |
| 3243 // Indicate whether it is safe to recreate VM | |
| 3244 volatile jint safe_to_recreate_vm = 1; | |
| 3245 struct JavaVM_ main_vm = {&jni_InvokeInterface}; | |
| 3246 | |
| 3247 | |
| 3248 #define JAVASTACKSIZE (400 * 1024) /* Default size of a thread java stack */ | |
| 3249 enum { VERIFY_NONE, VERIFY_REMOTE, VERIFY_ALL }; | |
| 3250 | |
| 3251 HS_DTRACE_PROBE_DECL1(hotspot_jni, GetDefaultJavaVMInitArgs__entry, void*); | |
| 3252 DT_RETURN_MARK_DECL(GetDefaultJavaVMInitArgs, jint); | |
| 3253 | |
| 3254 _JNI_IMPORT_OR_EXPORT_ jint JNICALL JNI_GetDefaultJavaVMInitArgs(void *args_) { | |
| 3255 HS_DTRACE_PROBE1(hotspot_jni, GetDefaultJavaVMInitArgs__entry, args_); | |
| 3256 JDK1_1InitArgs *args = (JDK1_1InitArgs *)args_; | |
| 3257 jint ret = JNI_ERR; | |
| 3258 DT_RETURN_MARK(GetDefaultJavaVMInitArgs, jint, (const jint&)ret); | |
| 3259 | |
| 3260 if (Threads::is_supported_jni_version(args->version)) { | |
| 3261 ret = JNI_OK; | |
| 3262 } | |
| 3263 // 1.1 style no longer supported in hotspot. | |
| 3264 // According the JNI spec, we should update args->version on return. | |
| 3265 // We also use the structure to communicate with launcher about default | |
| 3266 // stack size. | |
| 3267 if (args->version == JNI_VERSION_1_1) { | |
| 3268 args->version = JNI_VERSION_1_2; | |
| 3269 // javaStackSize is int in arguments structure | |
| 3270 assert(jlong(ThreadStackSize) * K < INT_MAX, "integer overflow"); | |
| 3271 args->javaStackSize = (jint)(ThreadStackSize * K); | |
| 3272 } | |
| 3273 return ret; | |
| 3274 } | |
| 3275 | |
| 3276 HS_DTRACE_PROBE_DECL3(hotspot_jni, CreateJavaVM__entry, vm, penv, args); | |
| 3277 DT_RETURN_MARK_DECL(CreateJavaVM, jint); | |
| 3278 | |
| 3279 _JNI_IMPORT_OR_EXPORT_ jint JNICALL JNI_CreateJavaVM(JavaVM **vm, void **penv, void *args) { | |
| 3280 HS_DTRACE_PROBE3(hotspot_jni, CreateJavaVM__entry, vm, penv, args); | |
| 3281 | |
| 3282 jint result = JNI_ERR; | |
| 3283 DT_RETURN_MARK(CreateJavaVM, jint, (const jint&)result); | |
| 3284 | |
| 1078 | 3285 // We're about to use Atomic::xchg for synchronization. Some Zero |
| 3286 // platforms use the GCC builtin __sync_lock_test_and_set for this, | |
| 3287 // but __sync_lock_test_and_set is not guaranteed to do what we want | |
| 3288 // on all architectures. So we check it works before relying on it. | |
| 3289 #if defined(ZERO) && defined(ASSERT) | |
| 3290 { | |
| 3291 jint a = 0xcafebabe; | |
| 3292 jint b = Atomic::xchg(0xdeadbeef, &a); | |
| 3293 void *c = &a; | |
| 3294 void *d = Atomic::xchg_ptr(&b, &c); | |
| 1132 | 3295 assert(a == (jint) 0xdeadbeef && b == (jint) 0xcafebabe, "Atomic::xchg() works"); |
| 1078 | 3296 assert(c == &b && d == &a, "Atomic::xchg_ptr() works"); |
| 3297 } | |
| 3298 #endif // ZERO && ASSERT | |
| 3299 | |
| 0 | 3300 // At the moment it's only possible to have one Java VM, |
| 3301 // since some of the runtime state is in global variables. | |
| 3302 | |
| 3303 // We cannot use our mutex locks here, since they only work on | |
| 3304 // Threads. We do an atomic compare and exchange to ensure only | |
| 3305 // one thread can call this method at a time | |
| 3306 | |
| 3307 // We use Atomic::xchg rather than Atomic::add/dec since on some platforms | |
| 3308 // the add/dec implementations are dependent on whether we are running | |
| 3309 // on a multiprocessor, and at this stage of initialization the os::is_MP | |
| 3310 // function used to determine this will always return false. Atomic::xchg | |
| 3311 // does not have this problem. | |
| 3312 if (Atomic::xchg(1, &vm_created) == 1) { | |
| 3313 return JNI_ERR; // already created, or create attempt in progress | |
| 3314 } | |
| 3315 if (Atomic::xchg(0, &safe_to_recreate_vm) == 0) { | |
| 3316 return JNI_ERR; // someone tried and failed and retry not allowed. | |
| 3317 } | |
| 3318 | |
| 3319 assert(vm_created == 1, "vm_created is true during the creation"); | |
| 3320 | |
| 3321 /** | |
| 3322 * Certain errors during initialization are recoverable and do not | |
| 3323 * prevent this method from being called again at a later time | |
| 3324 * (perhaps with different arguments). However, at a certain | |
| 3325 * point during initialization if an error occurs we cannot allow | |
| 3326 * this function to be called again (or it will crash). In those | |
| 3327 * situations, the 'canTryAgain' flag is set to false, which atomically | |
| 3328 * sets safe_to_recreate_vm to 1, such that any new call to | |
| 3329 * JNI_CreateJavaVM will immediately fail using the above logic. | |
| 3330 */ | |
| 3331 bool can_try_again = true; | |
| 3332 | |
| 3333 result = Threads::create_vm((JavaVMInitArgs*) args, &can_try_again); | |
| 3334 if (result == JNI_OK) { | |
| 3335 JavaThread *thread = JavaThread::current(); | |
| 3336 /* thread is thread_in_vm here */ | |
| 3337 *vm = (JavaVM *)(&main_vm); | |
| 3338 *(JNIEnv**)penv = thread->jni_environment(); | |
| 3339 | |
| 3340 // Tracks the time application was running before GC | |
| 3341 RuntimeService::record_application_start(); | |
| 3342 | |
| 3343 // Notify JVMTI | |
| 3344 if (JvmtiExport::should_post_thread_life()) { | |
| 3345 JvmtiExport::post_thread_start(thread); | |
| 3346 } | |
| 3347 // Check if we should compile all classes on bootclasspath | |
| 3348 NOT_PRODUCT(if (CompileTheWorld) ClassLoader::compile_the_world();) | |
| 3349 // Since this is not a JVM_ENTRY we have to set the thread state manually before leaving. | |
| 3350 ThreadStateTransition::transition_and_fence(thread, _thread_in_vm, _thread_in_native); | |
| 3351 } else { | |
| 3352 if (can_try_again) { | |
| 3353 // reset safe_to_recreate_vm to 1 so that retrial would be possible | |
| 3354 safe_to_recreate_vm = 1; | |
| 3355 } | |
| 3356 | |
| 3357 // Creation failed. We must reset vm_created | |
| 3358 *vm = 0; | |
| 3359 *(JNIEnv**)penv = 0; | |
| 3360 // reset vm_created last to avoid race condition. Use OrderAccess to | |
| 3361 // control both compiler and architectural-based reordering. | |
| 3362 OrderAccess::release_store(&vm_created, 0); | |
| 3363 } | |
| 3364 | |
|
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|
3365 NOT_PRODUCT(test_error_handler(ErrorHandlerTest)); |
| 0 | 3366 return result; |
| 3367 } | |
| 3368 | |
| 3369 HS_DTRACE_PROBE_DECL3(hotspot_jni, GetCreatedJavaVMs__entry, \ | |
| 3370 JavaVM**, jsize, jsize*); | |
| 3371 HS_DTRACE_PROBE_DECL1(hotspot_jni, GetCreatedJavaVMs__return, jint); | |
| 3372 | |
| 3373 _JNI_IMPORT_OR_EXPORT_ jint JNICALL JNI_GetCreatedJavaVMs(JavaVM **vm_buf, jsize bufLen, jsize *numVMs) { | |
| 3374 // See bug 4367188, the wrapper can sometimes cause VM crashes | |
| 3375 // JNIWrapper("GetCreatedJavaVMs"); | |
| 3376 HS_DTRACE_PROBE3(hotspot_jni, GetCreatedJavaVMs__entry, \ | |
| 3377 vm_buf, bufLen, numVMs); | |
| 3378 if (vm_created) { | |
| 3379 if (numVMs != NULL) *numVMs = 1; | |
| 3380 if (bufLen > 0) *vm_buf = (JavaVM *)(&main_vm); | |
| 3381 } else { | |
| 3382 if (numVMs != NULL) *numVMs = 0; | |
| 3383 } | |
| 3384 HS_DTRACE_PROBE1(hotspot_jni, GetCreatedJavaVMs__return, JNI_OK); | |
| 3385 return JNI_OK; | |
| 3386 } | |
| 3387 | |
| 3388 extern "C" { | |
| 3389 | |
| 3390 DT_RETURN_MARK_DECL(DestroyJavaVM, jint); | |
| 3391 | |
| 3392 jint JNICALL jni_DestroyJavaVM(JavaVM *vm) { | |
| 3393 DTRACE_PROBE1(hotspot_jni, DestroyJavaVM__entry, vm); | |
| 3394 jint res = JNI_ERR; | |
| 3395 DT_RETURN_MARK(DestroyJavaVM, jint, (const jint&)res); | |
| 3396 | |
| 3397 if (!vm_created) { | |
| 3398 res = JNI_ERR; | |
| 3399 return res; | |
| 3400 } | |
| 3401 | |
| 3402 JNIWrapper("DestroyJavaVM"); | |
| 3403 JNIEnv *env; | |
| 3404 JavaVMAttachArgs destroyargs; | |
| 3405 destroyargs.version = CurrentVersion; | |
| 3406 destroyargs.name = (char *)"DestroyJavaVM"; | |
| 3407 destroyargs.group = NULL; | |
| 3408 res = vm->AttachCurrentThread((void **)&env, (void *)&destroyargs); | |
| 3409 if (res != JNI_OK) { | |
| 3410 return res; | |
| 3411 } | |
| 3412 | |
| 3413 // Since this is not a JVM_ENTRY we have to set the thread state manually before entering. | |
| 3414 JavaThread* thread = JavaThread::current(); | |
| 3415 ThreadStateTransition::transition_from_native(thread, _thread_in_vm); | |
| 3416 if (Threads::destroy_vm()) { | |
| 3417 // Should not change thread state, VM is gone | |
| 3418 vm_created = false; | |
| 3419 res = JNI_OK; | |
| 3420 return res; | |
| 3421 } else { | |
| 3422 ThreadStateTransition::transition_and_fence(thread, _thread_in_vm, _thread_in_native); | |
| 3423 res = JNI_ERR; | |
| 3424 return res; | |
| 3425 } | |
| 3426 } | |
| 3427 | |
| 3428 | |
| 3429 static jint attach_current_thread(JavaVM *vm, void **penv, void *_args, bool daemon) { | |
| 3430 JavaVMAttachArgs *args = (JavaVMAttachArgs *) _args; | |
| 3431 | |
| 3432 // Check below commented out from JDK1.2fcs as well | |
| 3433 /* | |
| 3434 if (args && (args->version != JNI_VERSION_1_1 || args->version != JNI_VERSION_1_2)) { | |
| 3435 return JNI_EVERSION; | |
| 3436 } | |
| 3437 */ | |
| 3438 | |
| 3439 Thread* t = ThreadLocalStorage::get_thread_slow(); | |
| 3440 if (t != NULL) { | |
| 3441 // If the thread has been attached this operation is a no-op | |
| 3442 *(JNIEnv**)penv = ((JavaThread*) t)->jni_environment(); | |
| 3443 return JNI_OK; | |
| 3444 } | |
| 3445 | |
| 3446 // Create a thread and mark it as attaching so it will be skipped by the | |
| 3447 // ThreadsListEnumerator - see CR 6404306 | |
| 3448 JavaThread* thread = new JavaThread(true); | |
| 3449 | |
| 3450 // Set correct safepoint info. The thread is going to call into Java when | |
| 3451 // initializing the Java level thread object. Hence, the correct state must | |
| 3452 // be set in order for the Safepoint code to deal with it correctly. | |
| 3453 thread->set_thread_state(_thread_in_vm); | |
| 3454 // Must do this before initialize_thread_local_storage | |
| 3455 thread->record_stack_base_and_size(); | |
|
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|
3456 |
| 0 | 3457 thread->initialize_thread_local_storage(); |
| 3458 | |
| 3459 if (!os::create_attached_thread(thread)) { | |
| 3460 delete thread; | |
| 3461 return JNI_ERR; | |
| 3462 } | |
|
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|
3463 // Enable stack overflow checks |
|
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diff
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|
3464 thread->create_stack_guard_pages(); |
|
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|
3465 |
| 0 | 3466 thread->initialize_tlab(); |
| 3467 | |
|
1681
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|
3468 thread->cache_global_variables(); |
|
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|
3469 |
| 0 | 3470 // Crucial that we do not have a safepoint check for this thread, since it has |
| 3471 // not been added to the Thread list yet. | |
| 3472 { Threads_lock->lock_without_safepoint_check(); | |
| 3473 // This must be inside this lock in order to get FullGCALot to work properly, i.e., to | |
| 3474 // avoid this thread trying to do a GC before it is added to the thread-list | |
| 3475 thread->set_active_handles(JNIHandleBlock::allocate_block()); | |
| 3476 Threads::add(thread, daemon); | |
| 3477 Threads_lock->unlock(); | |
| 3478 } | |
| 3479 // Create thread group and name info from attach arguments | |
| 3480 oop group = NULL; | |
| 3481 char* thread_name = NULL; | |
| 3482 if (args != NULL && Threads::is_supported_jni_version(args->version)) { | |
| 3483 group = JNIHandles::resolve(args->group); | |
| 3484 thread_name = args->name; // may be NULL | |
| 3485 } | |
| 3486 if (group == NULL) group = Universe::main_thread_group(); | |
| 3487 | |
| 3488 // Create Java level thread object and attach it to this thread | |
| 3489 bool attach_failed = false; | |
| 3490 { | |
| 3491 EXCEPTION_MARK; | |
| 3492 HandleMark hm(THREAD); | |
| 3493 Handle thread_group(THREAD, group); | |
| 3494 thread->allocate_threadObj(thread_group, thread_name, daemon, THREAD); | |
| 3495 if (HAS_PENDING_EXCEPTION) { | |
| 3496 CLEAR_PENDING_EXCEPTION; | |
| 3497 // cleanup outside the handle mark. | |
| 3498 attach_failed = true; | |
| 3499 } | |
| 3500 } | |
| 3501 | |
| 3502 if (attach_failed) { | |
| 3503 // Added missing cleanup | |
| 3504 thread->cleanup_failed_attach_current_thread(); | |
| 3505 return JNI_ERR; | |
| 3506 } | |
| 3507 | |
| 3508 // mark the thread as no longer attaching | |
| 3509 // this uses a fence to push the change through so we don't have | |
| 3510 // to regrab the threads_lock | |
| 3511 thread->set_attached(); | |
| 3512 | |
| 3513 // Set java thread status. | |
| 3514 java_lang_Thread::set_thread_status(thread->threadObj(), | |
| 3515 java_lang_Thread::RUNNABLE); | |
| 3516 | |
| 3517 // Notify the debugger | |
| 3518 if (JvmtiExport::should_post_thread_life()) { | |
| 3519 JvmtiExport::post_thread_start(thread); | |
| 3520 } | |
| 3521 | |
| 3522 *(JNIEnv**)penv = thread->jni_environment(); | |
| 3523 | |
| 3524 // Now leaving the VM, so change thread_state. This is normally automatically taken care | |
| 3525 // of in the JVM_ENTRY. But in this situation we have to do it manually. Notice, that by | |
| 3526 // using ThreadStateTransition::transition, we do a callback to the safepoint code if | |
| 3527 // needed. | |
| 3528 | |
| 3529 ThreadStateTransition::transition_and_fence(thread, _thread_in_vm, _thread_in_native); | |
| 3530 | |
| 3531 // Perform any platform dependent FPU setup | |
| 3532 os::setup_fpu(); | |
| 3533 | |
| 3534 return JNI_OK; | |
| 3535 } | |
| 3536 | |
| 3537 | |
| 3538 jint JNICALL jni_AttachCurrentThread(JavaVM *vm, void **penv, void *_args) { | |
| 3539 DTRACE_PROBE3(hotspot_jni, AttachCurrentThread__entry, vm, penv, _args); | |
| 3540 if (!vm_created) { | |
| 3541 DTRACE_PROBE1(hotspot_jni, AttachCurrentThread__return, JNI_ERR); | |
| 3542 return JNI_ERR; | |
| 3543 } | |
| 3544 | |
| 3545 JNIWrapper("AttachCurrentThread"); | |
| 3546 jint ret = attach_current_thread(vm, penv, _args, false); | |
| 3547 DTRACE_PROBE1(hotspot_jni, AttachCurrentThread__return, ret); | |
| 3548 return ret; | |
| 3549 } | |
| 3550 | |
| 3551 | |
| 3552 jint JNICALL jni_DetachCurrentThread(JavaVM *vm) { | |
| 3553 DTRACE_PROBE1(hotspot_jni, DetachCurrentThread__entry, vm); | |
| 3554 VM_Exit::block_if_vm_exited(); | |
| 3555 | |
| 3556 JNIWrapper("DetachCurrentThread"); | |
| 3557 | |
| 3558 // If the thread has been deattacted the operations is a no-op | |
| 3559 if (ThreadLocalStorage::thread() == NULL) { | |
| 3560 DTRACE_PROBE1(hotspot_jni, DetachCurrentThread__return, JNI_OK); | |
| 3561 return JNI_OK; | |
| 3562 } | |
| 3563 | |
| 3564 JavaThread* thread = JavaThread::current(); | |
| 3565 if (thread->has_last_Java_frame()) { | |
| 3566 DTRACE_PROBE1(hotspot_jni, DetachCurrentThread__return, JNI_ERR); | |
| 3567 // Can't detach a thread that's running java, that can't work. | |
| 3568 return JNI_ERR; | |
| 3569 } | |
| 3570 | |
| 3571 // Safepoint support. Have to do call-back to safepoint code, if in the | |
| 3572 // middel of a safepoint operation | |
| 3573 ThreadStateTransition::transition_from_native(thread, _thread_in_vm); | |
| 3574 | |
| 3575 // XXX: Note that JavaThread::exit() call below removes the guards on the | |
| 3576 // stack pages set up via enable_stack_{red,yellow}_zone() calls | |
| 3577 // above in jni_AttachCurrentThread. Unfortunately, while the setting | |
| 3578 // of the guards is visible in jni_AttachCurrentThread above, | |
| 3579 // the removal of the guards is buried below in JavaThread::exit() | |
| 3580 // here. The abstraction should be more symmetrically either exposed | |
| 3581 // or hidden (e.g. it could probably be hidden in the same | |
| 3582 // (platform-dependent) methods where we do alternate stack | |
| 3583 // maintenance work?) | |
| 3584 thread->exit(false, JavaThread::jni_detach); | |
| 3585 delete thread; | |
| 3586 | |
| 3587 DTRACE_PROBE1(hotspot_jni, DetachCurrentThread__return, JNI_OK); | |
| 3588 return JNI_OK; | |
| 3589 } | |
| 3590 | |
| 3591 DT_RETURN_MARK_DECL(GetEnv, jint); | |
| 3592 | |
| 3593 jint JNICALL jni_GetEnv(JavaVM *vm, void **penv, jint version) { | |
| 3594 DTRACE_PROBE3(hotspot_jni, GetEnv__entry, vm, penv, version); | |
| 3595 jint ret = JNI_ERR; | |
| 3596 DT_RETURN_MARK(GetEnv, jint, (const jint&)ret); | |
| 3597 | |
| 3598 if (!vm_created) { | |
| 3599 *penv = NULL; | |
| 3600 ret = JNI_EDETACHED; | |
| 3601 return ret; | |
| 3602 } | |
| 3603 | |
| 3604 if (JvmtiExport::is_jvmti_version(version)) { | |
| 3605 ret = JvmtiExport::get_jvmti_interface(vm, penv, version); | |
| 3606 return ret; | |
| 3607 } | |
| 3608 | |
| 3609 #ifndef JVMPI_VERSION_1 | |
| 3610 // need these in order to be polite about older agents | |
| 3611 #define JVMPI_VERSION_1 ((jint)0x10000001) | |
| 3612 #define JVMPI_VERSION_1_1 ((jint)0x10000002) | |
| 3613 #define JVMPI_VERSION_1_2 ((jint)0x10000003) | |
| 3614 #endif // !JVMPI_VERSION_1 | |
| 3615 | |
| 3616 Thread* thread = ThreadLocalStorage::thread(); | |
| 3617 if (thread != NULL && thread->is_Java_thread()) { | |
| 3618 if (Threads::is_supported_jni_version_including_1_1(version)) { | |
| 3619 *(JNIEnv**)penv = ((JavaThread*) thread)->jni_environment(); | |
| 3620 ret = JNI_OK; | |
| 3621 return ret; | |
| 3622 | |
| 3623 } else if (version == JVMPI_VERSION_1 || | |
| 3624 version == JVMPI_VERSION_1_1 || | |
| 3625 version == JVMPI_VERSION_1_2) { | |
| 3626 tty->print_cr("ERROR: JVMPI, an experimental interface, is no longer supported."); | |
| 3627 tty->print_cr("Please use the supported interface: the JVM Tool Interface (JVM TI)."); | |
| 3628 ret = JNI_EVERSION; | |
| 3629 return ret; | |
| 3630 } else if (JvmtiExport::is_jvmdi_version(version)) { | |
| 3631 tty->print_cr("FATAL ERROR: JVMDI is no longer supported."); | |
| 3632 tty->print_cr("Please use the supported interface: the JVM Tool Interface (JVM TI)."); | |
| 3633 ret = JNI_EVERSION; | |
| 3634 return ret; | |
| 3635 } else { | |
| 3636 *penv = NULL; | |
| 3637 ret = JNI_EVERSION; | |
| 3638 return ret; | |
| 3639 } | |
| 3640 } else { | |
| 3641 *penv = NULL; | |
| 3642 ret = JNI_EDETACHED; | |
| 3643 return ret; | |
| 3644 } | |
| 3645 } | |
| 3646 | |
| 3647 | |
| 3648 jint JNICALL jni_AttachCurrentThreadAsDaemon(JavaVM *vm, void **penv, void *_args) { | |
| 3649 DTRACE_PROBE3(hotspot_jni, AttachCurrentThreadAsDaemon__entry, vm, penv, _args); | |
| 3650 if (!vm_created) { | |
| 3651 DTRACE_PROBE1(hotspot_jni, AttachCurrentThreadAsDaemon__return, JNI_ERR); | |
| 3652 return JNI_ERR; | |
| 3653 } | |
| 3654 | |
| 3655 JNIWrapper("AttachCurrentThreadAsDaemon"); | |
| 3656 jint ret = attach_current_thread(vm, penv, _args, true); | |
| 3657 DTRACE_PROBE1(hotspot_jni, AttachCurrentThreadAsDaemon__return, ret); | |
| 3658 return ret; | |
| 3659 } | |
| 3660 | |
| 3661 | |
| 3662 } // End extern "C" | |
| 3663 | |
| 3664 const struct JNIInvokeInterface_ jni_InvokeInterface = { | |
| 3665 NULL, | |
| 3666 NULL, | |
| 3667 NULL, | |
| 3668 | |
| 3669 jni_DestroyJavaVM, | |
| 3670 jni_AttachCurrentThread, | |
| 3671 jni_DetachCurrentThread, | |
| 3672 jni_GetEnv, | |
| 3673 jni_AttachCurrentThreadAsDaemon | |
| 3674 }; |