Mercurial > hg > truffle
annotate src/share/vm/prims/jni.cpp @ 3960:f08d439fab8c
7089790: integrate bsd-port changes
Reviewed-by: kvn, twisti, jrose
Contributed-by: Kurt Miller <kurt@intricatesoftware.com>, Greg Lewis <glewis@eyesbeyond.com>, Jung-uk Kim <jkim@freebsd.org>, Christos Zoulas <christos@zoulas.com>, Landon Fuller <landonf@plausible.coop>, The FreeBSD Foundation <board@freebsdfoundation.org>, Michael Franz <mvfranz@gmail.com>, Roger Hoover <rhoover@apple.com>, Alexander Strange <astrange@apple.com>
| author | never |
|---|---|
| date | Sun, 25 Sep 2011 16:03:29 -0700 |
| parents | e6b1331a51d2 |
| children | 436b4a3231bf |
| 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" | |
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32 #ifndef SERIALGC |
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33 #include "gc_implementation/g1/g1SATBCardTableModRefBS.hpp" |
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34 #endif // SERIALGC |
| 1972 | 35 #include "memory/allocation.inline.hpp" |
| 36 #include "memory/gcLocker.inline.hpp" | |
| 37 #include "memory/oopFactory.hpp" | |
| 38 #include "memory/universe.inline.hpp" | |
| 39 #include "oops/instanceKlass.hpp" | |
| 40 #include "oops/instanceOop.hpp" | |
| 41 #include "oops/markOop.hpp" | |
| 42 #include "oops/methodOop.hpp" | |
| 43 #include "oops/objArrayKlass.hpp" | |
| 44 #include "oops/objArrayOop.hpp" | |
| 45 #include "oops/oop.inline.hpp" | |
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46 #include "oops/symbol.hpp" |
| 1972 | 47 #include "oops/typeArrayKlass.hpp" |
| 48 #include "oops/typeArrayOop.hpp" | |
| 49 #include "prims/jni.h" | |
| 50 #include "prims/jniCheck.hpp" | |
| 51 #include "prims/jniFastGetField.hpp" | |
| 52 #include "prims/jvm.h" | |
| 53 #include "prims/jvm_misc.hpp" | |
| 54 #include "prims/jvmtiExport.hpp" | |
| 55 #include "prims/jvmtiThreadState.hpp" | |
| 56 #include "runtime/compilationPolicy.hpp" | |
| 57 #include "runtime/fieldDescriptor.hpp" | |
| 58 #include "runtime/fprofiler.hpp" | |
| 59 #include "runtime/handles.inline.hpp" | |
| 60 #include "runtime/interfaceSupport.hpp" | |
| 61 #include "runtime/java.hpp" | |
| 62 #include "runtime/javaCalls.hpp" | |
| 63 #include "runtime/jfieldIDWorkaround.hpp" | |
| 64 #include "runtime/reflection.hpp" | |
| 65 #include "runtime/sharedRuntime.hpp" | |
| 66 #include "runtime/signature.hpp" | |
| 67 #include "runtime/vm_operations.hpp" | |
| 68 #include "services/runtimeService.hpp" | |
| 69 #include "utilities/defaultStream.hpp" | |
| 70 #include "utilities/dtrace.hpp" | |
| 71 #include "utilities/events.hpp" | |
| 72 #include "utilities/histogram.hpp" | |
| 73 #ifdef TARGET_OS_FAMILY_linux | |
| 74 # include "os_linux.inline.hpp" | |
| 75 # include "thread_linux.inline.hpp" | |
| 76 #endif | |
| 77 #ifdef TARGET_OS_FAMILY_solaris | |
| 78 # include "os_solaris.inline.hpp" | |
| 79 # include "thread_solaris.inline.hpp" | |
| 80 #endif | |
| 81 #ifdef TARGET_OS_FAMILY_windows | |
| 82 # include "os_windows.inline.hpp" | |
| 83 # include "thread_windows.inline.hpp" | |
| 84 #endif | |
| 3960 | 85 #ifdef TARGET_OS_FAMILY_bsd |
| 86 # include "os_bsd.inline.hpp" | |
| 87 # include "thread_bsd.inline.hpp" | |
| 88 #endif | |
| 0 | 89 |
| 90 static jint CurrentVersion = JNI_VERSION_1_6; | |
| 91 | |
| 92 | |
| 93 // The DT_RETURN_MARK macros create a scoped object to fire the dtrace | |
| 94 // '-return' probe regardless of the return path is taken out of the function. | |
| 95 // Methods that have multiple return paths use this to avoid having to | |
| 96 // instrument each return path. Methods that use CHECK or THROW must use this | |
| 97 // since those macros can cause an immedate uninstrumented return. | |
| 98 // | |
| 99 // In order to get the return value, a reference to the variable containing | |
| 100 // the return value must be passed to the contructor of the object, and | |
| 101 // the return value must be set before return (since the mark object has | |
| 102 // a reference to it). | |
| 103 // | |
| 104 // Example: | |
| 105 // DT_RETURN_MARK_DECL(SomeFunc, int); | |
| 106 // JNI_ENTRY(int, SomeFunc, ...) | |
| 107 // int return_value = 0; | |
| 108 // DT_RETURN_MARK(SomeFunc, int, (const int&)return_value); | |
| 109 // foo(CHECK_0) | |
| 110 // return_value = 5; | |
| 111 // return return_value; | |
| 112 // JNI_END | |
| 113 #define DT_RETURN_MARK_DECL(name, type) \ | |
| 114 HS_DTRACE_PROBE_DECL1(hotspot_jni, name##__return, type); \ | |
| 115 DTRACE_ONLY( \ | |
| 116 class DTraceReturnProbeMark_##name { \ | |
| 117 public: \ | |
| 118 const type& _ret_ref; \ | |
| 119 DTraceReturnProbeMark_##name(const type& v) : _ret_ref(v) {} \ | |
| 120 ~DTraceReturnProbeMark_##name() { \ | |
| 121 HS_DTRACE_PROBE1(hotspot_jni, name##__return, _ret_ref); \ | |
| 122 } \ | |
| 123 } \ | |
| 124 ) | |
| 125 // Void functions are simpler since there's no return value | |
| 126 #define DT_VOID_RETURN_MARK_DECL(name) \ | |
| 127 HS_DTRACE_PROBE_DECL0(hotspot_jni, name##__return); \ | |
| 128 DTRACE_ONLY( \ | |
| 129 class DTraceReturnProbeMark_##name { \ | |
| 130 public: \ | |
| 131 ~DTraceReturnProbeMark_##name() { \ | |
| 132 HS_DTRACE_PROBE0(hotspot_jni, name##__return); \ | |
| 133 } \ | |
| 134 } \ | |
| 135 ) | |
| 136 | |
| 137 | |
| 138 // Place these macros in the function to mark the return. Non-void | |
| 139 // functions need the type and address of the return value. | |
| 140 #define DT_RETURN_MARK(name, type, ref) \ | |
| 141 DTRACE_ONLY( DTraceReturnProbeMark_##name dtrace_return_mark(ref) ) | |
| 142 #define DT_VOID_RETURN_MARK(name) \ | |
| 143 DTRACE_ONLY( DTraceReturnProbeMark_##name dtrace_return_mark ) | |
| 144 | |
| 145 | |
| 146 // Use these to select distinct code for floating-point vs. non-floating point | |
| 147 // situations. Used from within common macros where we need slightly | |
| 148 // different behavior for Float/Double | |
| 149 #define FP_SELECT_Boolean(intcode, fpcode) intcode | |
| 150 #define FP_SELECT_Byte(intcode, fpcode) intcode | |
| 151 #define FP_SELECT_Char(intcode, fpcode) intcode | |
| 152 #define FP_SELECT_Short(intcode, fpcode) intcode | |
| 153 #define FP_SELECT_Object(intcode, fpcode) intcode | |
| 154 #define FP_SELECT_Int(intcode, fpcode) intcode | |
| 155 #define FP_SELECT_Long(intcode, fpcode) intcode | |
| 156 #define FP_SELECT_Float(intcode, fpcode) fpcode | |
| 157 #define FP_SELECT_Double(intcode, fpcode) fpcode | |
| 158 #define FP_SELECT(TypeName, intcode, fpcode) \ | |
| 159 FP_SELECT_##TypeName(intcode, fpcode) | |
| 160 | |
| 161 #define COMMA , | |
| 162 | |
| 163 // Choose DT_RETURN_MARK macros based on the type: float/double -> void | |
| 164 // (dtrace doesn't do FP yet) | |
| 165 #define DT_RETURN_MARK_DECL_FOR(TypeName, name, type) \ | |
| 166 FP_SELECT(TypeName, \ | |
| 167 DT_RETURN_MARK_DECL(name, type), DT_VOID_RETURN_MARK_DECL(name) ) | |
| 168 #define DT_RETURN_MARK_FOR(TypeName, name, type, ref) \ | |
| 169 FP_SELECT(TypeName, \ | |
| 170 DT_RETURN_MARK(name, type, ref), DT_VOID_RETURN_MARK(name) ) | |
| 171 | |
| 172 | |
| 173 // out-of-line helpers for class jfieldIDWorkaround: | |
| 174 | |
| 175 bool jfieldIDWorkaround::is_valid_jfieldID(klassOop k, jfieldID id) { | |
| 176 if (jfieldIDWorkaround::is_instance_jfieldID(k, id)) { | |
| 177 uintptr_t as_uint = (uintptr_t) id; | |
| 178 intptr_t offset = raw_instance_offset(id); | |
| 179 if (is_checked_jfieldID(id)) { | |
| 180 if (!klass_hash_ok(k, id)) { | |
| 181 return false; | |
| 182 } | |
| 183 } | |
| 184 return instanceKlass::cast(k)->contains_field_offset(offset); | |
| 185 } else { | |
| 186 JNIid* result = (JNIid*) id; | |
| 187 #ifdef ASSERT | |
| 188 return result != NULL && result->is_static_field_id(); | |
| 189 #else | |
| 190 return result != NULL; | |
| 191 #endif | |
| 192 } | |
| 193 } | |
| 194 | |
| 195 | |
| 196 intptr_t jfieldIDWorkaround::encode_klass_hash(klassOop k, intptr_t offset) { | |
| 197 if (offset <= small_offset_mask) { | |
| 198 klassOop field_klass = k; | |
| 199 klassOop super_klass = Klass::cast(field_klass)->super(); | |
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200 // With compressed oops the most super class with nonstatic fields would |
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201 // be the owner of fields embedded in the header. |
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202 while (instanceKlass::cast(super_klass)->has_nonstatic_fields() && |
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203 instanceKlass::cast(super_klass)->contains_field_offset(offset)) { |
| 0 | 204 field_klass = super_klass; // super contains the field also |
| 205 super_klass = Klass::cast(field_klass)->super(); | |
| 206 } | |
| 207 debug_only(No_Safepoint_Verifier nosafepoint;) | |
| 208 uintptr_t klass_hash = field_klass->identity_hash(); | |
| 209 return ((klass_hash & klass_mask) << klass_shift) | checked_mask_in_place; | |
| 210 } else { | |
| 211 #if 0 | |
| 212 #ifndef PRODUCT | |
| 213 { | |
| 214 ResourceMark rm; | |
| 215 warning("VerifyJNIFields: long offset %d in %s", offset, Klass::cast(k)->external_name()); | |
| 216 } | |
| 217 #endif | |
| 218 #endif | |
| 219 return 0; | |
| 220 } | |
| 221 } | |
| 222 | |
| 223 bool jfieldIDWorkaround::klass_hash_ok(klassOop k, jfieldID id) { | |
| 224 uintptr_t as_uint = (uintptr_t) id; | |
| 225 intptr_t klass_hash = (as_uint >> klass_shift) & klass_mask; | |
| 226 do { | |
| 227 debug_only(No_Safepoint_Verifier nosafepoint;) | |
| 228 // Could use a non-blocking query for identity_hash here... | |
| 229 if ((k->identity_hash() & klass_mask) == klass_hash) | |
| 230 return true; | |
| 231 k = Klass::cast(k)->super(); | |
| 232 } while (k != NULL); | |
| 233 return false; | |
| 234 } | |
| 235 | |
| 236 void jfieldIDWorkaround::verify_instance_jfieldID(klassOop k, jfieldID id) { | |
| 237 guarantee(jfieldIDWorkaround::is_instance_jfieldID(k, id), "must be an instance field" ); | |
| 238 uintptr_t as_uint = (uintptr_t) id; | |
| 239 intptr_t offset = raw_instance_offset(id); | |
| 240 if (VerifyJNIFields) { | |
| 241 if (is_checked_jfieldID(id)) { | |
| 242 guarantee(klass_hash_ok(k, id), | |
| 243 "Bug in native code: jfieldID class must match object"); | |
| 244 } else { | |
| 245 #if 0 | |
| 246 #ifndef PRODUCT | |
| 247 if (Verbose) { | |
| 248 ResourceMark rm; | |
| 249 warning("VerifyJNIFields: unverified offset %d for %s", offset, Klass::cast(k)->external_name()); | |
| 250 } | |
| 251 #endif | |
| 252 #endif | |
| 253 } | |
| 254 } | |
| 255 guarantee(instanceKlass::cast(k)->contains_field_offset(offset), | |
| 256 "Bug in native code: jfieldID offset must address interior of object"); | |
| 257 } | |
| 258 | |
| 259 // Pick a reasonable higher bound for local capacity requested | |
| 260 // for EnsureLocalCapacity and PushLocalFrame. We don't want it too | |
| 261 // high because a test (or very unusual application) may try to allocate | |
| 262 // that many handles and run out of swap space. An implementation is | |
| 263 // permitted to allocate more handles than the ensured capacity, so this | |
| 264 // value is set high enough to prevent compatibility problems. | |
| 265 const int MAX_REASONABLE_LOCAL_CAPACITY = 4*K; | |
| 266 | |
| 267 | |
| 268 // Wrapper to trace JNI functions | |
| 269 | |
| 270 #ifdef ASSERT | |
| 271 Histogram* JNIHistogram; | |
| 272 static volatile jint JNIHistogram_lock = 0; | |
| 273 | |
| 274 class JNITraceWrapper : public StackObj { | |
| 275 public: | |
| 276 JNITraceWrapper(const char* format, ...) { | |
| 277 if (TraceJNICalls) { | |
| 278 va_list ap; | |
| 279 va_start(ap, format); | |
| 280 tty->print("JNI "); | |
| 281 tty->vprint_cr(format, ap); | |
| 282 va_end(ap); | |
| 283 } | |
| 284 } | |
| 285 }; | |
| 286 | |
| 287 class JNIHistogramElement : public HistogramElement { | |
| 288 public: | |
| 289 JNIHistogramElement(const char* name); | |
| 290 }; | |
| 291 | |
| 292 JNIHistogramElement::JNIHistogramElement(const char* elementName) { | |
| 293 _name = elementName; | |
| 294 uintx count = 0; | |
| 295 | |
| 296 while (Atomic::cmpxchg(1, &JNIHistogram_lock, 0) != 0) { | |
| 297 while (OrderAccess::load_acquire(&JNIHistogram_lock) != 0) { | |
| 298 count +=1; | |
| 299 if ( (WarnOnStalledSpinLock > 0) | |
| 300 && (count % WarnOnStalledSpinLock == 0)) { | |
| 301 warning("JNIHistogram_lock seems to be stalled"); | |
| 302 } | |
| 303 } | |
| 304 } | |
| 305 | |
| 306 | |
| 307 if(JNIHistogram == NULL) | |
| 308 JNIHistogram = new Histogram("JNI Call Counts",100); | |
| 309 | |
| 310 JNIHistogram->add_element(this); | |
| 311 Atomic::dec(&JNIHistogram_lock); | |
| 312 } | |
| 313 | |
| 314 #define JNICountWrapper(arg) \ | |
| 315 static JNIHistogramElement* e = new JNIHistogramElement(arg); \ | |
| 316 /* There is a MT-race condition in VC++. So we need to make sure that that e has been initialized */ \ | |
| 317 if (e != NULL) e->increment_count() | |
| 318 #define JNIWrapper(arg) JNICountWrapper(arg); JNITraceWrapper(arg) | |
| 319 #else | |
| 320 #define JNIWrapper(arg) | |
| 321 #endif | |
| 322 | |
| 323 | |
| 324 // Implementation of JNI entries | |
| 325 | |
| 326 DT_RETURN_MARK_DECL(DefineClass, jclass); | |
| 327 | |
| 328 JNI_ENTRY(jclass, jni_DefineClass(JNIEnv *env, const char *name, jobject loaderRef, | |
| 329 const jbyte *buf, jsize bufLen)) | |
| 330 JNIWrapper("DefineClass"); | |
| 331 | |
| 332 DTRACE_PROBE5(hotspot_jni, DefineClass__entry, | |
| 333 env, name, loaderRef, buf, bufLen); | |
| 334 jclass cls = NULL; | |
| 335 DT_RETURN_MARK(DefineClass, jclass, (const jclass&)cls); | |
| 336 | |
| 337 // Since exceptions can be thrown, class initialization can take place | |
| 338 // if name is NULL no check for class name in .class stream has to be made. | |
| 339 if (name != NULL) { | |
| 340 const int str_len = (int)strlen(name); | |
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341 if (str_len > Symbol::max_length()) { |
| 0 | 342 // It's impossible to create this class; the name cannot fit |
| 343 // into the constant pool. | |
| 344 THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), name); | |
| 345 } | |
| 346 } | |
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347 TempNewSymbol class_name = SymbolTable::new_symbol(name, THREAD); |
| 0 | 348 |
| 349 ResourceMark rm(THREAD); | |
| 350 ClassFileStream st((u1*) buf, bufLen, NULL); | |
| 351 Handle class_loader (THREAD, JNIHandles::resolve(loaderRef)); | |
| 352 | |
| 353 if (UsePerfData && !class_loader.is_null()) { | |
| 354 // check whether the current caller thread holds the lock or not. | |
| 355 // If not, increment the corresponding counter | |
| 356 if (ObjectSynchronizer:: | |
| 357 query_lock_ownership((JavaThread*)THREAD, class_loader) != | |
| 358 ObjectSynchronizer::owner_self) { | |
| 359 ClassLoader::sync_JNIDefineClassLockFreeCounter()->inc(); | |
| 360 } | |
| 361 } | |
| 362 klassOop k = SystemDictionary::resolve_from_stream(class_name, class_loader, | |
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363 Handle(), &st, true, |
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364 CHECK_NULL); |
| 0 | 365 |
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366 if (TraceClassResolution && k != NULL) { |
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367 trace_class_resolution(k); |
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368 } |
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369 |
| 0 | 370 cls = (jclass)JNIHandles::make_local( |
| 371 env, Klass::cast(k)->java_mirror()); | |
| 372 return cls; | |
| 373 JNI_END | |
| 374 | |
| 375 | |
| 376 | |
| 377 static bool first_time_FindClass = true; | |
| 378 | |
| 379 DT_RETURN_MARK_DECL(FindClass, jclass); | |
| 380 | |
| 381 JNI_ENTRY(jclass, jni_FindClass(JNIEnv *env, const char *name)) | |
| 382 JNIWrapper("FindClass"); | |
| 383 DTRACE_PROBE2(hotspot_jni, FindClass__entry, env, name); | |
| 384 | |
| 385 jclass result = NULL; | |
| 386 DT_RETURN_MARK(FindClass, jclass, (const jclass&)result); | |
| 387 | |
| 388 // Remember if we are the first invocation of jni_FindClass | |
| 389 bool first_time = first_time_FindClass; | |
| 390 first_time_FindClass = false; | |
| 391 | |
| 392 // Sanity check the name: it cannot be null or larger than the maximum size | |
| 393 // name we can fit in the constant pool. | |
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394 if (name == NULL || (int)strlen(name) > Symbol::max_length()) { |
| 0 | 395 THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), name); |
| 396 } | |
| 397 | |
| 398 //%note jni_3 | |
| 399 Handle loader; | |
| 400 Handle protection_domain; | |
| 401 // Find calling class | |
| 402 instanceKlassHandle k (THREAD, thread->security_get_caller_class(0)); | |
| 403 if (k.not_null()) { | |
| 404 loader = Handle(THREAD, k->class_loader()); | |
| 405 // Special handling to make sure JNI_OnLoad and JNI_OnUnload are executed | |
| 406 // in the correct class context. | |
| 407 if (loader.is_null() && | |
| 408 k->name() == vmSymbols::java_lang_ClassLoader_NativeLibrary()) { | |
| 409 JavaValue result(T_OBJECT); | |
| 410 JavaCalls::call_static(&result, k, | |
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411 vmSymbols::getFromClass_name(), |
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412 vmSymbols::void_class_signature(), |
| 0 | 413 thread); |
| 414 if (HAS_PENDING_EXCEPTION) { | |
| 415 Handle ex(thread, thread->pending_exception()); | |
| 416 CLEAR_PENDING_EXCEPTION; | |
| 417 THROW_HANDLE_0(ex); | |
| 418 } | |
| 419 oop mirror = (oop) result.get_jobject(); | |
| 420 loader = Handle(THREAD, | |
| 421 instanceKlass::cast(java_lang_Class::as_klassOop(mirror))->class_loader()); | |
| 422 protection_domain = Handle(THREAD, | |
| 423 instanceKlass::cast(java_lang_Class::as_klassOop(mirror))->protection_domain()); | |
| 424 } | |
| 425 } else { | |
| 426 // We call ClassLoader.getSystemClassLoader to obtain the system class loader. | |
| 427 loader = Handle(THREAD, SystemDictionary::java_system_loader()); | |
| 428 } | |
| 429 | |
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430 TempNewSymbol sym = SymbolTable::new_symbol(name, CHECK_NULL); |
| 0 | 431 result = find_class_from_class_loader(env, sym, true, loader, |
| 432 protection_domain, true, thread); | |
| 433 | |
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434 if (TraceClassResolution && result != NULL) { |
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435 trace_class_resolution(java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(result))); |
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436 } |
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437 |
| 0 | 438 // If we were the first invocation of jni_FindClass, we enable compilation again |
| 439 // rather than just allowing invocation counter to overflow and decay. | |
| 440 // Controlled by flag DelayCompilationDuringStartup. | |
| 441 if (first_time && !CompileTheWorld) | |
| 442 CompilationPolicy::completed_vm_startup(); | |
| 443 | |
| 444 return result; | |
| 445 JNI_END | |
| 446 | |
| 447 DT_RETURN_MARK_DECL(FromReflectedMethod, jmethodID); | |
| 448 | |
| 449 JNI_ENTRY(jmethodID, jni_FromReflectedMethod(JNIEnv *env, jobject method)) | |
| 450 JNIWrapper("FromReflectedMethod"); | |
| 451 DTRACE_PROBE2(hotspot_jni, FromReflectedMethod__entry, env, method); | |
| 452 jmethodID ret = NULL; | |
| 453 DT_RETURN_MARK(FromReflectedMethod, jmethodID, (const jmethodID&)ret); | |
| 454 | |
| 455 // method is a handle to a java.lang.reflect.Method object | |
| 456 oop reflected = JNIHandles::resolve_non_null(method); | |
| 457 oop mirror = NULL; | |
| 458 int slot = 0; | |
| 459 | |
| 1142 | 460 if (reflected->klass() == SystemDictionary::reflect_Constructor_klass()) { |
| 0 | 461 mirror = java_lang_reflect_Constructor::clazz(reflected); |
| 462 slot = java_lang_reflect_Constructor::slot(reflected); | |
| 463 } else { | |
| 1142 | 464 assert(reflected->klass() == SystemDictionary::reflect_Method_klass(), "wrong type"); |
| 0 | 465 mirror = java_lang_reflect_Method::clazz(reflected); |
| 466 slot = java_lang_reflect_Method::slot(reflected); | |
| 467 } | |
| 468 klassOop k = java_lang_Class::as_klassOop(mirror); | |
| 469 | |
| 470 KlassHandle k1(THREAD, k); | |
| 471 // Make sure class is initialized before handing id's out to methods | |
| 472 Klass::cast(k1())->initialize(CHECK_NULL); | |
| 473 methodOop m = instanceKlass::cast(k1())->method_with_idnum(slot); | |
| 474 ret = m==NULL? NULL : m->jmethod_id(); // return NULL if reflected method deleted | |
| 475 return ret; | |
| 476 JNI_END | |
| 477 | |
| 478 DT_RETURN_MARK_DECL(FromReflectedField, jfieldID); | |
| 479 | |
| 480 JNI_ENTRY(jfieldID, jni_FromReflectedField(JNIEnv *env, jobject field)) | |
| 481 JNIWrapper("FromReflectedField"); | |
| 482 DTRACE_PROBE2(hotspot_jni, FromReflectedField__entry, env, field); | |
| 483 jfieldID ret = NULL; | |
| 484 DT_RETURN_MARK(FromReflectedField, jfieldID, (const jfieldID&)ret); | |
| 485 | |
| 486 // field is a handle to a java.lang.reflect.Field object | |
| 487 oop reflected = JNIHandles::resolve_non_null(field); | |
| 488 oop mirror = java_lang_reflect_Field::clazz(reflected); | |
| 489 klassOop k = java_lang_Class::as_klassOop(mirror); | |
| 490 int slot = java_lang_reflect_Field::slot(reflected); | |
| 491 int modifiers = java_lang_reflect_Field::modifiers(reflected); | |
| 492 | |
| 493 KlassHandle k1(THREAD, k); | |
| 494 // Make sure class is initialized before handing id's out to fields | |
| 495 Klass::cast(k1())->initialize(CHECK_NULL); | |
| 496 | |
| 497 // First check if this is a static field | |
| 498 if (modifiers & JVM_ACC_STATIC) { | |
| 3938 | 499 intptr_t offset = instanceKlass::cast(k1())->field_offset( slot ); |
| 0 | 500 JNIid* id = instanceKlass::cast(k1())->jni_id_for(offset); |
| 501 assert(id != NULL, "corrupt Field object"); | |
| 502 debug_only(id->set_is_static_field_id();) | |
| 503 // A jfieldID for a static field is a JNIid specifying the field holder and the offset within the klassOop | |
| 504 ret = jfieldIDWorkaround::to_static_jfieldID(id); | |
| 505 return ret; | |
| 506 } | |
| 507 | |
| 508 // The slot is the index of the field description in the field-array | |
| 509 // The jfieldID is the offset of the field within the object | |
| 510 // It may also have hash bits for k, if VerifyJNIFields is turned on. | |
| 3938 | 511 intptr_t offset = instanceKlass::cast(k1())->field_offset( slot ); |
| 0 | 512 assert(instanceKlass::cast(k1())->contains_field_offset(offset), "stay within object"); |
| 513 ret = jfieldIDWorkaround::to_instance_jfieldID(k1(), offset); | |
| 514 return ret; | |
| 515 JNI_END | |
| 516 | |
| 517 DT_RETURN_MARK_DECL(ToReflectedMethod, jobject); | |
| 518 | |
| 519 JNI_ENTRY(jobject, jni_ToReflectedMethod(JNIEnv *env, jclass cls, jmethodID method_id, jboolean isStatic)) | |
| 520 JNIWrapper("ToReflectedMethod"); | |
| 521 DTRACE_PROBE4(hotspot_jni, ToReflectedMethod__entry, env, cls, method_id, isStatic); | |
| 522 jobject ret = NULL; | |
| 523 DT_RETURN_MARK(ToReflectedMethod, jobject, (const jobject&)ret); | |
| 524 | |
| 525 methodHandle m (THREAD, JNIHandles::resolve_jmethod_id(method_id)); | |
| 526 assert(m->is_static() == (isStatic != 0), "jni_ToReflectedMethod access flags doesn't match"); | |
| 527 oop reflection_method; | |
| 528 if (m->is_initializer()) { | |
| 529 reflection_method = Reflection::new_constructor(m, CHECK_NULL); | |
| 530 } else { | |
| 531 reflection_method = Reflection::new_method(m, UseNewReflection, false, CHECK_NULL); | |
| 532 } | |
| 533 ret = JNIHandles::make_local(env, reflection_method); | |
| 534 return ret; | |
| 535 JNI_END | |
| 536 | |
| 537 DT_RETURN_MARK_DECL(GetSuperclass, jclass); | |
| 538 | |
| 539 JNI_ENTRY(jclass, jni_GetSuperclass(JNIEnv *env, jclass sub)) | |
| 540 JNIWrapper("GetSuperclass"); | |
| 541 DTRACE_PROBE2(hotspot_jni, GetSuperclass__entry, env, sub); | |
| 542 jclass obj = NULL; | |
| 543 DT_RETURN_MARK(GetSuperclass, jclass, (const jclass&)obj); | |
| 544 | |
| 545 oop mirror = JNIHandles::resolve_non_null(sub); | |
| 546 // primitive classes return NULL | |
| 547 if (java_lang_Class::is_primitive(mirror)) return NULL; | |
| 548 | |
| 549 // Rules of Class.getSuperClass as implemented by KLass::java_super: | |
| 550 // arrays return Object | |
| 551 // interfaces return NULL | |
| 552 // proper classes return Klass::super() | |
| 553 klassOop k = java_lang_Class::as_klassOop(mirror); | |
| 554 if (Klass::cast(k)->is_interface()) return NULL; | |
| 555 | |
| 556 // return mirror for superclass | |
| 557 klassOop super = Klass::cast(k)->java_super(); | |
| 558 // super2 is the value computed by the compiler's getSuperClass intrinsic: | |
| 559 debug_only(klassOop super2 = ( Klass::cast(k)->oop_is_javaArray() | |
| 1142 | 560 ? SystemDictionary::Object_klass() |
| 0 | 561 : Klass::cast(k)->super() ) ); |
| 562 assert(super == super2, | |
| 563 "java_super computation depends on interface, array, other super"); | |
| 564 obj = (super == NULL) ? NULL : (jclass) JNIHandles::make_local(Klass::cast(super)->java_mirror()); | |
| 565 return obj; | |
| 566 JNI_END | |
| 567 | |
| 568 JNI_QUICK_ENTRY(jboolean, jni_IsAssignableFrom(JNIEnv *env, jclass sub, jclass super)) | |
| 569 JNIWrapper("IsSubclassOf"); | |
| 570 DTRACE_PROBE3(hotspot_jni, IsAssignableFrom__entry, env, sub, super); | |
| 571 oop sub_mirror = JNIHandles::resolve_non_null(sub); | |
| 572 oop super_mirror = JNIHandles::resolve_non_null(super); | |
| 573 if (java_lang_Class::is_primitive(sub_mirror) || | |
| 574 java_lang_Class::is_primitive(super_mirror)) { | |
| 575 jboolean ret = (sub_mirror == super_mirror); | |
| 576 DTRACE_PROBE1(hotspot_jni, IsAssignableFrom__return, ret); | |
| 577 return ret; | |
| 578 } | |
| 579 klassOop sub_klass = java_lang_Class::as_klassOop(sub_mirror); | |
| 580 klassOop super_klass = java_lang_Class::as_klassOop(super_mirror); | |
| 581 assert(sub_klass != NULL && super_klass != NULL, "invalid arguments to jni_IsAssignableFrom"); | |
| 582 jboolean ret = Klass::cast(sub_klass)->is_subtype_of(super_klass) ? | |
| 583 JNI_TRUE : JNI_FALSE; | |
| 584 DTRACE_PROBE1(hotspot_jni, IsAssignableFrom__return, ret); | |
| 585 return ret; | |
| 586 JNI_END | |
| 587 | |
| 588 DT_RETURN_MARK_DECL(Throw, jint); | |
| 589 | |
| 590 JNI_ENTRY(jint, jni_Throw(JNIEnv *env, jthrowable obj)) | |
| 591 JNIWrapper("Throw"); | |
| 592 DTRACE_PROBE2(hotspot_jni, Throw__entry, env, obj); | |
| 593 jint ret = JNI_OK; | |
| 594 DT_RETURN_MARK(Throw, jint, (const jint&)ret); | |
| 595 | |
| 596 THROW_OOP_(JNIHandles::resolve(obj), JNI_OK); | |
| 597 ShouldNotReachHere(); | |
| 598 JNI_END | |
| 599 | |
| 600 DT_RETURN_MARK_DECL(ThrowNew, jint); | |
| 601 | |
| 602 JNI_ENTRY(jint, jni_ThrowNew(JNIEnv *env, jclass clazz, const char *message)) | |
| 603 JNIWrapper("ThrowNew"); | |
| 604 DTRACE_PROBE3(hotspot_jni, ThrowNew__entry, env, clazz, message); | |
| 605 jint ret = JNI_OK; | |
| 606 DT_RETURN_MARK(ThrowNew, jint, (const jint&)ret); | |
| 607 | |
| 608 instanceKlass* k = instanceKlass::cast(java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(clazz))); | |
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609 Symbol* name = k->name(); |
| 0 | 610 Handle class_loader (THREAD, k->class_loader()); |
| 611 Handle protection_domain (THREAD, k->protection_domain()); | |
| 612 THROW_MSG_LOADER_(name, (char *)message, class_loader, protection_domain, JNI_OK); | |
| 613 ShouldNotReachHere(); | |
| 614 JNI_END | |
| 615 | |
| 616 | |
| 617 // JNI functions only transform a pending async exception to a synchronous | |
| 618 // exception in ExceptionOccurred and ExceptionCheck calls, since | |
| 619 // delivering an async exception in other places won't change the native | |
| 620 // code's control flow and would be harmful when native code further calls | |
| 621 // JNI functions with a pending exception. Async exception is also checked | |
| 622 // during the call, so ExceptionOccurred/ExceptionCheck won't return | |
| 623 // false but deliver the async exception at the very end during | |
| 624 // state transition. | |
| 625 | |
| 626 static void jni_check_async_exceptions(JavaThread *thread) { | |
| 627 assert(thread == Thread::current(), "must be itself"); | |
| 628 thread->check_and_handle_async_exceptions(); | |
| 629 } | |
| 630 | |
| 631 JNI_ENTRY_NO_PRESERVE(jthrowable, jni_ExceptionOccurred(JNIEnv *env)) | |
| 632 JNIWrapper("ExceptionOccurred"); | |
| 633 DTRACE_PROBE1(hotspot_jni, ExceptionOccurred__entry, env); | |
| 634 jni_check_async_exceptions(thread); | |
| 635 oop exception = thread->pending_exception(); | |
| 636 jthrowable ret = (jthrowable) JNIHandles::make_local(env, exception); | |
| 637 DTRACE_PROBE1(hotspot_jni, ExceptionOccurred__return, ret); | |
| 638 return ret; | |
| 639 JNI_END | |
| 640 | |
| 641 | |
| 642 JNI_ENTRY_NO_PRESERVE(void, jni_ExceptionDescribe(JNIEnv *env)) | |
| 643 JNIWrapper("ExceptionDescribe"); | |
| 644 DTRACE_PROBE1(hotspot_jni, ExceptionDescribe__entry, env); | |
| 645 if (thread->has_pending_exception()) { | |
| 646 Handle ex(thread, thread->pending_exception()); | |
| 647 thread->clear_pending_exception(); | |
| 1142 | 648 if (ex->is_a(SystemDictionary::ThreadDeath_klass())) { |
| 0 | 649 // Don't print anything if we are being killed. |
| 650 } else { | |
| 651 jio_fprintf(defaultStream::error_stream(), "Exception "); | |
| 652 if (thread != NULL && thread->threadObj() != NULL) { | |
| 653 ResourceMark rm(THREAD); | |
| 654 jio_fprintf(defaultStream::error_stream(), | |
| 655 "in thread \"%s\" ", thread->get_thread_name()); | |
| 656 } | |
| 1142 | 657 if (ex->is_a(SystemDictionary::Throwable_klass())) { |
| 0 | 658 JavaValue result(T_VOID); |
| 659 JavaCalls::call_virtual(&result, | |
| 660 ex, | |
| 661 KlassHandle(THREAD, | |
| 1142 | 662 SystemDictionary::Throwable_klass()), |
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663 vmSymbols::printStackTrace_name(), |
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664 vmSymbols::void_method_signature(), |
| 0 | 665 THREAD); |
| 666 // If an exception is thrown in the call it gets thrown away. Not much | |
| 667 // we can do with it. The native code that calls this, does not check | |
| 668 // for the exception - hence, it might still be in the thread when DestroyVM gets | |
| 669 // called, potentially causing a few asserts to trigger - since no pending exception | |
| 670 // is expected. | |
| 671 CLEAR_PENDING_EXCEPTION; | |
| 672 } else { | |
| 673 ResourceMark rm(THREAD); | |
| 674 jio_fprintf(defaultStream::error_stream(), | |
| 675 ". Uncaught exception of type %s.", | |
| 676 Klass::cast(ex->klass())->external_name()); | |
| 677 } | |
| 678 } | |
| 679 } | |
| 680 DTRACE_PROBE(hotspot_jni, ExceptionDescribe__return); | |
| 681 JNI_END | |
| 682 | |
| 683 | |
| 684 JNI_QUICK_ENTRY(void, jni_ExceptionClear(JNIEnv *env)) | |
| 685 JNIWrapper("ExceptionClear"); | |
| 686 DTRACE_PROBE1(hotspot_jni, ExceptionClear__entry, env); | |
| 687 | |
| 688 // The jni code might be using this API to clear java thrown exception. | |
| 689 // So just mark jvmti thread exception state as exception caught. | |
| 690 JvmtiThreadState *state = JavaThread::current()->jvmti_thread_state(); | |
| 691 if (state != NULL && state->is_exception_detected()) { | |
| 692 state->set_exception_caught(); | |
| 693 } | |
| 694 thread->clear_pending_exception(); | |
| 695 DTRACE_PROBE(hotspot_jni, ExceptionClear__return); | |
| 696 JNI_END | |
| 697 | |
| 698 | |
| 699 JNI_ENTRY(void, jni_FatalError(JNIEnv *env, const char *msg)) | |
| 700 JNIWrapper("FatalError"); | |
| 701 DTRACE_PROBE2(hotspot_jni, FatalError__entry, env, msg); | |
| 702 tty->print_cr("FATAL ERROR in native method: %s", msg); | |
| 703 thread->print_stack(); | |
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704 os::abort(); // Dump core and abort |
| 0 | 705 JNI_END |
| 706 | |
| 707 | |
| 708 JNI_ENTRY(jint, jni_PushLocalFrame(JNIEnv *env, jint capacity)) | |
| 709 JNIWrapper("PushLocalFrame"); | |
| 710 DTRACE_PROBE2(hotspot_jni, PushLocalFrame__entry, env, capacity); | |
| 711 //%note jni_11 | |
| 712 if (capacity < 0 && capacity > MAX_REASONABLE_LOCAL_CAPACITY) { | |
| 713 DTRACE_PROBE1(hotspot_jni, PushLocalFrame__return, JNI_ERR); | |
| 714 return JNI_ERR; | |
| 715 } | |
| 716 JNIHandleBlock* old_handles = thread->active_handles(); | |
| 717 JNIHandleBlock* new_handles = JNIHandleBlock::allocate_block(thread); | |
| 718 assert(new_handles != NULL, "should not be NULL"); | |
| 719 new_handles->set_pop_frame_link(old_handles); | |
| 720 thread->set_active_handles(new_handles); | |
| 721 jint ret = JNI_OK; | |
| 722 DTRACE_PROBE1(hotspot_jni, PushLocalFrame__return, ret); | |
| 723 return ret; | |
| 724 JNI_END | |
| 725 | |
| 726 | |
| 727 JNI_ENTRY(jobject, jni_PopLocalFrame(JNIEnv *env, jobject result)) | |
| 728 JNIWrapper("PopLocalFrame"); | |
| 729 DTRACE_PROBE2(hotspot_jni, PopLocalFrame__entry, env, result); | |
| 730 //%note jni_11 | |
| 731 Handle result_handle(thread, JNIHandles::resolve(result)); | |
| 732 JNIHandleBlock* old_handles = thread->active_handles(); | |
| 733 JNIHandleBlock* new_handles = old_handles->pop_frame_link(); | |
| 734 if (new_handles != NULL) { | |
| 735 // As a sanity check we only release the handle blocks if the pop_frame_link is not NULL. | |
| 736 // This way code will still work if PopLocalFrame is called without a corresponding | |
| 737 // PushLocalFrame call. Note that we set the pop_frame_link to NULL explicitly, otherwise | |
| 738 // the release_block call will release the blocks. | |
| 739 thread->set_active_handles(new_handles); | |
| 740 old_handles->set_pop_frame_link(NULL); // clear link we won't release new_handles below | |
| 741 JNIHandleBlock::release_block(old_handles, thread); // may block | |
| 742 result = JNIHandles::make_local(thread, result_handle()); | |
| 743 } | |
| 744 DTRACE_PROBE1(hotspot_jni, PopLocalFrame__return, result); | |
| 745 return result; | |
| 746 JNI_END | |
| 747 | |
| 748 | |
| 749 JNI_ENTRY(jobject, jni_NewGlobalRef(JNIEnv *env, jobject ref)) | |
| 750 JNIWrapper("NewGlobalRef"); | |
| 751 DTRACE_PROBE2(hotspot_jni, NewGlobalRef__entry, env, ref); | |
| 752 Handle ref_handle(thread, JNIHandles::resolve(ref)); | |
| 753 jobject ret = JNIHandles::make_global(ref_handle); | |
| 754 DTRACE_PROBE1(hotspot_jni, NewGlobalRef__return, ret); | |
| 755 return ret; | |
| 756 JNI_END | |
| 757 | |
| 758 // Must be JNI_ENTRY (with HandleMark) | |
| 759 JNI_ENTRY_NO_PRESERVE(void, jni_DeleteGlobalRef(JNIEnv *env, jobject ref)) | |
| 760 JNIWrapper("DeleteGlobalRef"); | |
| 761 DTRACE_PROBE2(hotspot_jni, DeleteGlobalRef__entry, env, ref); | |
| 762 JNIHandles::destroy_global(ref); | |
| 763 DTRACE_PROBE(hotspot_jni, DeleteGlobalRef__return); | |
| 764 JNI_END | |
| 765 | |
| 766 JNI_QUICK_ENTRY(void, jni_DeleteLocalRef(JNIEnv *env, jobject obj)) | |
| 767 JNIWrapper("DeleteLocalRef"); | |
| 768 DTRACE_PROBE2(hotspot_jni, DeleteLocalRef__entry, env, obj); | |
| 769 JNIHandles::destroy_local(obj); | |
| 770 DTRACE_PROBE(hotspot_jni, DeleteLocalRef__return); | |
| 771 JNI_END | |
| 772 | |
| 773 JNI_QUICK_ENTRY(jboolean, jni_IsSameObject(JNIEnv *env, jobject r1, jobject r2)) | |
| 774 JNIWrapper("IsSameObject"); | |
| 775 DTRACE_PROBE3(hotspot_jni, IsSameObject__entry, env, r1, r2); | |
| 776 oop a = JNIHandles::resolve(r1); | |
| 777 oop b = JNIHandles::resolve(r2); | |
| 778 jboolean ret = (a == b) ? JNI_TRUE : JNI_FALSE; | |
| 779 DTRACE_PROBE1(hotspot_jni, IsSameObject__return, ret); | |
| 780 return ret; | |
| 781 JNI_END | |
| 782 | |
| 783 | |
| 784 JNI_ENTRY(jobject, jni_NewLocalRef(JNIEnv *env, jobject ref)) | |
| 785 JNIWrapper("NewLocalRef"); | |
| 786 DTRACE_PROBE2(hotspot_jni, NewLocalRef__entry, env, ref); | |
| 787 jobject ret = JNIHandles::make_local(env, JNIHandles::resolve(ref)); | |
| 788 DTRACE_PROBE1(hotspot_jni, NewLocalRef__return, ret); | |
| 789 return ret; | |
| 790 JNI_END | |
| 791 | |
| 792 JNI_LEAF(jint, jni_EnsureLocalCapacity(JNIEnv *env, jint capacity)) | |
| 793 JNIWrapper("EnsureLocalCapacity"); | |
| 794 DTRACE_PROBE2(hotspot_jni, EnsureLocalCapacity__entry, env, capacity); | |
| 795 jint ret; | |
| 796 if (capacity >= 0 && capacity <= MAX_REASONABLE_LOCAL_CAPACITY) { | |
| 797 ret = JNI_OK; | |
| 798 } else { | |
| 799 ret = JNI_ERR; | |
| 800 } | |
| 801 DTRACE_PROBE1(hotspot_jni, EnsureLocalCapacity__return, ret); | |
| 802 return ret; | |
| 803 JNI_END | |
| 804 | |
| 805 // Return the Handle Type | |
| 806 JNI_LEAF(jobjectRefType, jni_GetObjectRefType(JNIEnv *env, jobject obj)) | |
| 807 JNIWrapper("GetObjectRefType"); | |
| 808 DTRACE_PROBE2(hotspot_jni, GetObjectRefType__entry, env, obj); | |
| 809 jobjectRefType ret; | |
| 810 if (JNIHandles::is_local_handle(thread, obj) || | |
| 811 JNIHandles::is_frame_handle(thread, obj)) | |
| 812 ret = JNILocalRefType; | |
| 813 else if (JNIHandles::is_global_handle(obj)) | |
| 814 ret = JNIGlobalRefType; | |
| 815 else if (JNIHandles::is_weak_global_handle(obj)) | |
| 816 ret = JNIWeakGlobalRefType; | |
| 817 else | |
| 818 ret = JNIInvalidRefType; | |
| 819 DTRACE_PROBE1(hotspot_jni, GetObjectRefType__return, ret); | |
| 820 return ret; | |
| 821 JNI_END | |
| 822 | |
| 823 | |
| 824 class JNI_ArgumentPusher : public SignatureIterator { | |
| 825 protected: | |
| 826 JavaCallArguments* _arguments; | |
| 827 | |
| 828 virtual void get_bool () = 0; | |
| 829 virtual void get_char () = 0; | |
| 830 virtual void get_short () = 0; | |
| 831 virtual void get_byte () = 0; | |
| 832 virtual void get_int () = 0; | |
| 833 virtual void get_long () = 0; | |
| 834 virtual void get_float () = 0; | |
| 835 virtual void get_double () = 0; | |
| 836 virtual void get_object () = 0; | |
| 837 | |
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838 JNI_ArgumentPusher(Symbol* signature) : SignatureIterator(signature) { |
| 0 | 839 this->_return_type = T_ILLEGAL; |
| 840 _arguments = NULL; | |
| 841 } | |
| 842 | |
| 843 public: | |
| 844 virtual void iterate( uint64_t fingerprint ) = 0; | |
| 845 | |
| 846 void set_java_argument_object(JavaCallArguments *arguments) { _arguments = arguments; } | |
| 847 | |
| 848 inline void do_bool() { if (!is_return_type()) get_bool(); } | |
| 849 inline void do_char() { if (!is_return_type()) get_char(); } | |
| 850 inline void do_short() { if (!is_return_type()) get_short(); } | |
| 851 inline void do_byte() { if (!is_return_type()) get_byte(); } | |
| 852 inline void do_int() { if (!is_return_type()) get_int(); } | |
| 853 inline void do_long() { if (!is_return_type()) get_long(); } | |
| 854 inline void do_float() { if (!is_return_type()) get_float(); } | |
| 855 inline void do_double() { if (!is_return_type()) get_double(); } | |
| 856 inline void do_object(int begin, int end) { if (!is_return_type()) get_object(); } | |
| 857 inline void do_array(int begin, int end) { if (!is_return_type()) get_object(); } // do_array uses get_object -- there is no get_array | |
| 858 inline void do_void() { } | |
| 859 | |
| 860 JavaCallArguments* arguments() { return _arguments; } | |
| 861 void push_receiver(Handle h) { _arguments->push_oop(h); } | |
| 862 }; | |
| 863 | |
| 864 | |
| 865 class JNI_ArgumentPusherVaArg : public JNI_ArgumentPusher { | |
| 866 protected: | |
| 867 va_list _ap; | |
| 868 | |
| 869 inline void get_bool() { _arguments->push_int(va_arg(_ap, jint)); } // bool is coerced to int when using va_arg | |
| 870 inline void get_char() { _arguments->push_int(va_arg(_ap, jint)); } // char is coerced to int when using va_arg | |
| 871 inline void get_short() { _arguments->push_int(va_arg(_ap, jint)); } // short is coerced to int when using va_arg | |
| 872 inline void get_byte() { _arguments->push_int(va_arg(_ap, jint)); } // byte is coerced to int when using va_arg | |
| 873 inline void get_int() { _arguments->push_int(va_arg(_ap, jint)); } | |
| 874 | |
| 875 // each of these paths is exercized by the various jck Call[Static,Nonvirtual,][Void,Int,..]Method[A,V,] tests | |
| 876 | |
| 877 inline void get_long() { _arguments->push_long(va_arg(_ap, jlong)); } | |
| 878 inline void get_float() { _arguments->push_float((jfloat)va_arg(_ap, jdouble)); } // float is coerced to double w/ va_arg | |
| 879 inline void get_double() { _arguments->push_double(va_arg(_ap, jdouble)); } | |
| 880 inline void get_object() { jobject l = va_arg(_ap, jobject); | |
| 881 _arguments->push_oop(Handle((oop *)l, false)); } | |
| 882 | |
| 883 inline void set_ap(va_list rap) { | |
| 884 #ifdef va_copy | |
| 885 va_copy(_ap, rap); | |
| 886 #elif defined (__va_copy) | |
| 887 __va_copy(_ap, rap); | |
| 888 #else | |
| 889 _ap = rap; | |
| 890 #endif | |
| 891 } | |
| 892 | |
| 893 public: | |
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894 JNI_ArgumentPusherVaArg(Symbol* signature, va_list rap) |
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895 : JNI_ArgumentPusher(signature) { |
| 0 | 896 set_ap(rap); |
| 897 } | |
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898 JNI_ArgumentPusherVaArg(jmethodID method_id, va_list rap) |
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899 : JNI_ArgumentPusher(JNIHandles::resolve_jmethod_id(method_id)->signature()) { |
| 0 | 900 set_ap(rap); |
| 901 } | |
| 902 | |
| 903 // Optimized path if we have the bitvector form of signature | |
| 904 void iterate( uint64_t fingerprint ) { | |
| 905 if ( fingerprint == UCONST64(-1) ) SignatureIterator::iterate();// Must be too many arguments | |
| 906 else { | |
| 907 _return_type = (BasicType)((fingerprint >> static_feature_size) & | |
| 908 result_feature_mask); | |
| 909 | |
| 910 assert(fingerprint, "Fingerprint should not be 0"); | |
| 911 fingerprint = fingerprint >> (static_feature_size + result_feature_size); | |
| 912 while ( 1 ) { | |
| 913 switch ( fingerprint & parameter_feature_mask ) { | |
| 914 case bool_parm: | |
| 915 case char_parm: | |
| 916 case short_parm: | |
| 917 case byte_parm: | |
| 918 case int_parm: | |
| 919 get_int(); | |
| 920 break; | |
| 921 case obj_parm: | |
| 922 get_object(); | |
| 923 break; | |
| 924 case long_parm: | |
| 925 get_long(); | |
| 926 break; | |
| 927 case float_parm: | |
| 928 get_float(); | |
| 929 break; | |
| 930 case double_parm: | |
| 931 get_double(); | |
| 932 break; | |
| 933 case done_parm: | |
| 934 return; | |
| 935 break; | |
| 936 default: | |
| 937 ShouldNotReachHere(); | |
| 938 break; | |
| 939 } | |
| 940 fingerprint >>= parameter_feature_size; | |
| 941 } | |
| 942 } | |
| 943 } | |
| 944 }; | |
| 945 | |
| 946 | |
| 947 class JNI_ArgumentPusherArray : public JNI_ArgumentPusher { | |
| 948 protected: | |
| 949 const jvalue *_ap; | |
| 950 | |
| 951 inline void get_bool() { _arguments->push_int((jint)(_ap++)->z); } | |
| 952 inline void get_char() { _arguments->push_int((jint)(_ap++)->c); } | |
| 953 inline void get_short() { _arguments->push_int((jint)(_ap++)->s); } | |
| 954 inline void get_byte() { _arguments->push_int((jint)(_ap++)->b); } | |
| 955 inline void get_int() { _arguments->push_int((jint)(_ap++)->i); } | |
| 956 | |
| 957 inline void get_long() { _arguments->push_long((_ap++)->j); } | |
| 958 inline void get_float() { _arguments->push_float((_ap++)->f); } | |
| 959 inline void get_double() { _arguments->push_double((_ap++)->d);} | |
| 960 inline void get_object() { _arguments->push_oop(Handle((oop *)(_ap++)->l, false)); } | |
| 961 | |
| 962 inline void set_ap(const jvalue *rap) { _ap = rap; } | |
| 963 | |
| 964 public: | |
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965 JNI_ArgumentPusherArray(Symbol* signature, const jvalue *rap) |
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966 : JNI_ArgumentPusher(signature) { |
| 0 | 967 set_ap(rap); |
| 968 } | |
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969 JNI_ArgumentPusherArray(jmethodID method_id, const jvalue *rap) |
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970 : JNI_ArgumentPusher(JNIHandles::resolve_jmethod_id(method_id)->signature()) { |
| 0 | 971 set_ap(rap); |
| 972 } | |
| 973 | |
| 974 // Optimized path if we have the bitvector form of signature | |
| 975 void iterate( uint64_t fingerprint ) { | |
| 976 if ( fingerprint == UCONST64(-1) ) SignatureIterator::iterate(); // Must be too many arguments | |
| 977 else { | |
| 978 _return_type = (BasicType)((fingerprint >> static_feature_size) & | |
| 979 result_feature_mask); | |
| 980 assert(fingerprint, "Fingerprint should not be 0"); | |
| 981 fingerprint = fingerprint >> (static_feature_size + result_feature_size); | |
| 982 while ( 1 ) { | |
| 983 switch ( fingerprint & parameter_feature_mask ) { | |
| 984 case bool_parm: | |
| 985 get_bool(); | |
| 986 break; | |
| 987 case char_parm: | |
| 988 get_char(); | |
| 989 break; | |
| 990 case short_parm: | |
| 991 get_short(); | |
| 992 break; | |
| 993 case byte_parm: | |
| 994 get_byte(); | |
| 995 break; | |
| 996 case int_parm: | |
| 997 get_int(); | |
| 998 break; | |
| 999 case obj_parm: | |
| 1000 get_object(); | |
| 1001 break; | |
| 1002 case long_parm: | |
| 1003 get_long(); | |
| 1004 break; | |
| 1005 case float_parm: | |
| 1006 get_float(); | |
| 1007 break; | |
| 1008 case double_parm: | |
| 1009 get_double(); | |
| 1010 break; | |
| 1011 case done_parm: | |
| 1012 return; | |
| 1013 break; | |
| 1014 default: | |
| 1015 ShouldNotReachHere(); | |
| 1016 break; | |
| 1017 } | |
| 1018 fingerprint >>= parameter_feature_size; | |
| 1019 } | |
| 1020 } | |
| 1021 } | |
| 1022 }; | |
| 1023 | |
| 1024 | |
| 1025 enum JNICallType { | |
| 1026 JNI_STATIC, | |
| 1027 JNI_VIRTUAL, | |
| 1028 JNI_NONVIRTUAL | |
| 1029 }; | |
| 1030 | |
| 1031 static methodHandle jni_resolve_interface_call(Handle recv, methodHandle method, TRAPS) { | |
| 1032 assert(!method.is_null() , "method should not be null"); | |
| 1033 | |
| 1034 KlassHandle recv_klass; // Default to NULL (use of ?: can confuse gcc) | |
| 1035 if (recv.not_null()) recv_klass = KlassHandle(THREAD, recv->klass()); | |
| 1036 KlassHandle spec_klass (THREAD, method->method_holder()); | |
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1037 Symbol* name = method->name(); |
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1038 Symbol* signature = method->signature(); |
| 0 | 1039 CallInfo info; |
| 1040 LinkResolver::resolve_interface_call(info, recv, recv_klass, spec_klass, name, signature, KlassHandle(), false, true, CHECK_(methodHandle())); | |
| 1041 return info.selected_method(); | |
| 1042 } | |
| 1043 | |
| 1044 static methodHandle jni_resolve_virtual_call(Handle recv, methodHandle method, TRAPS) { | |
| 1045 assert(!method.is_null() , "method should not be null"); | |
| 1046 | |
| 1047 KlassHandle recv_klass; // Default to NULL (use of ?: can confuse gcc) | |
| 1048 if (recv.not_null()) recv_klass = KlassHandle(THREAD, recv->klass()); | |
| 1049 KlassHandle spec_klass (THREAD, method->method_holder()); | |
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1050 Symbol* name = method->name(); |
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1051 Symbol* signature = method->signature(); |
| 0 | 1052 CallInfo info; |
| 1053 LinkResolver::resolve_virtual_call(info, recv, recv_klass, spec_klass, name, signature, KlassHandle(), false, true, CHECK_(methodHandle())); | |
| 1054 return info.selected_method(); | |
| 1055 } | |
| 1056 | |
| 1057 | |
| 1058 | |
| 1059 static void jni_invoke_static(JNIEnv *env, JavaValue* result, jobject receiver, JNICallType call_type, jmethodID method_id, JNI_ArgumentPusher *args, TRAPS) { | |
| 1060 methodHandle method(THREAD, JNIHandles::resolve_jmethod_id(method_id)); | |
| 1061 | |
| 1062 // Create object to hold arguments for the JavaCall, and associate it with | |
| 1063 // the jni parser | |
| 1064 ResourceMark rm(THREAD); | |
| 1065 int number_of_parameters = method->size_of_parameters(); | |
| 1066 JavaCallArguments java_args(number_of_parameters); | |
| 1067 args->set_java_argument_object(&java_args); | |
| 1068 | |
| 1069 assert(method->is_static(), "method should be static"); | |
| 1070 | |
| 1071 // Fill out JavaCallArguments object | |
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1072 args->iterate( Fingerprinter(method).fingerprint() ); |
| 0 | 1073 // Initialize result type |
| 1074 result->set_type(args->get_ret_type()); | |
| 1075 | |
| 1076 // Invoke the method. Result is returned as oop. | |
| 1077 JavaCalls::call(result, method, &java_args, CHECK); | |
| 1078 | |
| 1079 // Convert result | |
| 1080 if (result->get_type() == T_OBJECT || result->get_type() == T_ARRAY) { | |
| 1081 result->set_jobject(JNIHandles::make_local(env, (oop) result->get_jobject())); | |
| 1082 } | |
| 1083 } | |
| 1084 | |
| 1085 | |
| 1086 static void jni_invoke_nonstatic(JNIEnv *env, JavaValue* result, jobject receiver, JNICallType call_type, jmethodID method_id, JNI_ArgumentPusher *args, TRAPS) { | |
| 1087 oop recv = JNIHandles::resolve(receiver); | |
| 1088 if (recv == NULL) { | |
| 1089 THROW(vmSymbols::java_lang_NullPointerException()); | |
| 1090 } | |
| 1091 Handle h_recv(THREAD, recv); | |
| 1092 | |
| 1093 int number_of_parameters; | |
| 1094 methodOop selected_method; | |
| 1095 { | |
| 1096 methodOop m = JNIHandles::resolve_jmethod_id(method_id); | |
| 1097 number_of_parameters = m->size_of_parameters(); | |
| 1098 klassOop holder = m->method_holder(); | |
| 1099 if (!(Klass::cast(holder))->is_interface()) { | |
| 1100 // non-interface call -- for that little speed boost, don't handlize | |
| 1101 debug_only(No_Safepoint_Verifier nosafepoint;) | |
| 1102 if (call_type == JNI_VIRTUAL) { | |
| 1103 // jni_GetMethodID makes sure class is linked and initialized | |
| 1104 // so m should have a valid vtable index. | |
| 1105 int vtbl_index = m->vtable_index(); | |
| 1106 if (vtbl_index != methodOopDesc::nonvirtual_vtable_index) { | |
| 1107 klassOop k = h_recv->klass(); | |
| 1108 // k might be an arrayKlassOop but all vtables start at | |
| 1109 // the same place. The cast is to avoid virtual call and assertion. | |
| 1110 instanceKlass *ik = (instanceKlass*)k->klass_part(); | |
| 1111 selected_method = ik->method_at_vtable(vtbl_index); | |
| 1112 } else { | |
| 1113 // final method | |
| 1114 selected_method = m; | |
| 1115 } | |
| 1116 } else { | |
| 1117 // JNI_NONVIRTUAL call | |
| 1118 selected_method = m; | |
| 1119 } | |
| 1120 } else { | |
| 1121 // interface call | |
| 1122 KlassHandle h_holder(THREAD, holder); | |
| 1123 | |
| 1124 int itbl_index = m->cached_itable_index(); | |
| 1125 if (itbl_index == -1) { | |
| 1126 itbl_index = klassItable::compute_itable_index(m); | |
| 1127 m->set_cached_itable_index(itbl_index); | |
| 1128 // the above may have grabbed a lock, 'm' and anything non-handlized can't be used again | |
| 1129 } | |
| 1130 klassOop k = h_recv->klass(); | |
| 1131 selected_method = instanceKlass::cast(k)->method_at_itable(h_holder(), itbl_index, CHECK); | |
| 1132 } | |
| 1133 } | |
| 1134 | |
| 1135 methodHandle method(THREAD, selected_method); | |
| 1136 | |
| 1137 // Create object to hold arguments for the JavaCall, and associate it with | |
| 1138 // the jni parser | |
| 1139 ResourceMark rm(THREAD); | |
| 1140 JavaCallArguments java_args(number_of_parameters); | |
| 1141 args->set_java_argument_object(&java_args); | |
| 1142 | |
| 1143 // handle arguments | |
| 1144 assert(!method->is_static(), "method should not be static"); | |
| 1145 args->push_receiver(h_recv); // Push jobject handle | |
| 1146 | |
| 1147 // Fill out JavaCallArguments object | |
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1148 args->iterate( Fingerprinter(method).fingerprint() ); |
| 0 | 1149 // Initialize result type |
| 1150 result->set_type(args->get_ret_type()); | |
| 1151 | |
| 1152 // Invoke the method. Result is returned as oop. | |
| 1153 JavaCalls::call(result, method, &java_args, CHECK); | |
| 1154 | |
| 1155 // Convert result | |
| 1156 if (result->get_type() == T_OBJECT || result->get_type() == T_ARRAY) { | |
| 1157 result->set_jobject(JNIHandles::make_local(env, (oop) result->get_jobject())); | |
| 1158 } | |
| 1159 } | |
| 1160 | |
| 1161 | |
| 1162 static instanceOop alloc_object(jclass clazz, TRAPS) { | |
| 1163 KlassHandle k(THREAD, java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(clazz))); | |
| 1164 Klass::cast(k())->check_valid_for_instantiation(false, CHECK_NULL); | |
| 1165 instanceKlass::cast(k())->initialize(CHECK_NULL); | |
| 1166 instanceOop ih = instanceKlass::cast(k())->allocate_instance(THREAD); | |
| 1167 return ih; | |
| 1168 } | |
| 1169 | |
| 1170 DT_RETURN_MARK_DECL(AllocObject, jobject); | |
| 1171 | |
| 1172 JNI_ENTRY(jobject, jni_AllocObject(JNIEnv *env, jclass clazz)) | |
| 1173 JNIWrapper("AllocObject"); | |
| 1174 | |
| 1175 DTRACE_PROBE2(hotspot_jni, AllocObject__entry, env, clazz); | |
| 1176 jobject ret = NULL; | |
| 1177 DT_RETURN_MARK(AllocObject, jobject, (const jobject&)ret); | |
| 1178 | |
| 1179 instanceOop i = alloc_object(clazz, CHECK_NULL); | |
| 1180 ret = JNIHandles::make_local(env, i); | |
| 1181 return ret; | |
| 1182 JNI_END | |
| 1183 | |
| 1184 DT_RETURN_MARK_DECL(NewObjectA, jobject); | |
| 1185 | |
| 1186 JNI_ENTRY(jobject, jni_NewObjectA(JNIEnv *env, jclass clazz, jmethodID methodID, const jvalue *args)) | |
| 1187 JNIWrapper("NewObjectA"); | |
| 1188 DTRACE_PROBE3(hotspot_jni, NewObjectA__entry, env, clazz, methodID); | |
| 1189 jobject obj = NULL; | |
| 1190 DT_RETURN_MARK(NewObjectA, jobject, (const jobject)obj); | |
| 1191 | |
| 1192 instanceOop i = alloc_object(clazz, CHECK_NULL); | |
| 1193 obj = JNIHandles::make_local(env, i); | |
| 1194 JavaValue jvalue(T_VOID); | |
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1195 JNI_ArgumentPusherArray ap(methodID, args); |
| 0 | 1196 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_NULL); |
| 1197 return obj; | |
| 1198 JNI_END | |
| 1199 | |
| 1200 DT_RETURN_MARK_DECL(NewObjectV, jobject); | |
| 1201 | |
| 1202 JNI_ENTRY(jobject, jni_NewObjectV(JNIEnv *env, jclass clazz, jmethodID methodID, va_list args)) | |
| 1203 JNIWrapper("NewObjectV"); | |
| 1204 DTRACE_PROBE3(hotspot_jni, NewObjectV__entry, env, clazz, methodID); | |
| 1205 jobject obj = NULL; | |
| 1206 DT_RETURN_MARK(NewObjectV, jobject, (const jobject&)obj); | |
| 1207 | |
| 1208 instanceOop i = alloc_object(clazz, CHECK_NULL); | |
| 1209 obj = JNIHandles::make_local(env, i); | |
| 1210 JavaValue jvalue(T_VOID); | |
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1211 JNI_ArgumentPusherVaArg ap(methodID, args); |
| 0 | 1212 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_NULL); |
| 1213 return obj; | |
| 1214 JNI_END | |
| 1215 | |
| 1216 DT_RETURN_MARK_DECL(NewObject, jobject); | |
| 1217 | |
| 1218 JNI_ENTRY(jobject, jni_NewObject(JNIEnv *env, jclass clazz, jmethodID methodID, ...)) | |
| 1219 JNIWrapper("NewObject"); | |
| 1220 DTRACE_PROBE3(hotspot_jni, NewObject__entry, env, clazz, methodID); | |
| 1221 jobject obj = NULL; | |
| 1222 DT_RETURN_MARK(NewObject, jobject, (const jobject&)obj); | |
| 1223 | |
| 1224 instanceOop i = alloc_object(clazz, CHECK_NULL); | |
| 1225 obj = JNIHandles::make_local(env, i); | |
| 1226 va_list args; | |
| 1227 va_start(args, methodID); | |
| 1228 JavaValue jvalue(T_VOID); | |
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1229 JNI_ArgumentPusherVaArg ap(methodID, args); |
| 0 | 1230 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_NULL); |
| 1231 va_end(args); | |
| 1232 return obj; | |
| 1233 JNI_END | |
| 1234 | |
| 1235 | |
| 1236 JNI_ENTRY(jclass, jni_GetObjectClass(JNIEnv *env, jobject obj)) | |
| 1237 JNIWrapper("GetObjectClass"); | |
| 1238 DTRACE_PROBE2(hotspot_jni, GetObjectClass__entry, env, obj); | |
| 1239 klassOop k = JNIHandles::resolve_non_null(obj)->klass(); | |
| 1240 jclass ret = | |
| 1241 (jclass) JNIHandles::make_local(env, Klass::cast(k)->java_mirror()); | |
| 1242 DTRACE_PROBE1(hotspot_jni, GetObjectClass__return, ret); | |
| 1243 return ret; | |
| 1244 JNI_END | |
| 1245 | |
| 1246 JNI_QUICK_ENTRY(jboolean, jni_IsInstanceOf(JNIEnv *env, jobject obj, jclass clazz)) | |
| 1247 JNIWrapper("IsInstanceOf"); | |
| 1248 DTRACE_PROBE3(hotspot_jni, IsInstanceOf__entry, env, obj, clazz); | |
| 1249 jboolean ret = JNI_TRUE; | |
| 1250 if (obj != NULL) { | |
| 1251 ret = JNI_FALSE; | |
| 1252 klassOop k = java_lang_Class::as_klassOop( | |
| 1253 JNIHandles::resolve_non_null(clazz)); | |
| 1254 if (k != NULL) { | |
| 1255 ret = JNIHandles::resolve_non_null(obj)->is_a(k) ? JNI_TRUE : JNI_FALSE; | |
| 1256 } | |
| 1257 } | |
| 1258 DTRACE_PROBE1(hotspot_jni, IsInstanceOf__return, ret); | |
| 1259 return ret; | |
| 1260 JNI_END | |
| 1261 | |
| 1262 | |
| 1263 static jmethodID get_method_id(JNIEnv *env, jclass clazz, const char *name_str, | |
| 1264 const char *sig, bool is_static, TRAPS) { | |
| 1265 // %%%% This code should probably just call into a method in the LinkResolver | |
| 1266 // | |
| 1267 // The class should have been loaded (we have an instance of the class | |
| 1268 // passed in) so the method and signature should already be in the symbol | |
| 1269 // table. If they're not there, the method doesn't exist. | |
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1270 const char *name_to_probe = (name_str == NULL) |
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1271 ? vmSymbols::object_initializer_name()->as_C_string() |
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1272 : name_str; |
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1273 TempNewSymbol name = SymbolTable::probe(name_to_probe, (int)strlen(name_to_probe)); |
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1274 TempNewSymbol signature = SymbolTable::probe(sig, (int)strlen(sig)); |
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1275 |
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1276 if (name == NULL || signature == NULL) { |
| 0 | 1277 THROW_MSG_0(vmSymbols::java_lang_NoSuchMethodError(), name_str); |
| 1278 } | |
| 1279 | |
| 1280 // Throw a NoSuchMethodError exception if we have an instance of a | |
| 1281 // primitive java.lang.Class | |
| 1282 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(clazz))) { | |
| 1283 THROW_MSG_0(vmSymbols::java_lang_NoSuchMethodError(), name_str); | |
| 1284 } | |
| 1285 | |
| 1286 KlassHandle klass(THREAD, | |
| 1287 java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(clazz))); | |
| 1288 | |
| 1289 // Make sure class is linked and initialized before handing id's out to | |
| 1290 // methodOops. | |
| 1291 Klass::cast(klass())->initialize(CHECK_NULL); | |
| 1292 | |
| 1293 methodOop m; | |
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1294 if (name == vmSymbols::object_initializer_name() || |
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1295 name == vmSymbols::class_initializer_name()) { |
| 0 | 1296 // Never search superclasses for constructors |
| 1297 if (klass->oop_is_instance()) { | |
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1298 m = instanceKlass::cast(klass())->find_method(name, signature); |
| 0 | 1299 } else { |
| 1300 m = NULL; | |
| 1301 } | |
| 1302 } else { | |
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1303 m = klass->lookup_method(name, signature); |
| 0 | 1304 // Look up interfaces |
| 1305 if (m == NULL && klass->oop_is_instance()) { | |
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1306 m = instanceKlass::cast(klass())->lookup_method_in_all_interfaces(name, |
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1307 signature); |
| 0 | 1308 } |
| 1309 } | |
| 1310 if (m == NULL || (m->is_static() != is_static)) { | |
| 1311 THROW_MSG_0(vmSymbols::java_lang_NoSuchMethodError(), name_str); | |
| 1312 } | |
| 1313 return m->jmethod_id(); | |
| 1314 } | |
| 1315 | |
| 1316 | |
| 1317 JNI_ENTRY(jmethodID, jni_GetMethodID(JNIEnv *env, jclass clazz, | |
| 1318 const char *name, const char *sig)) | |
| 1319 JNIWrapper("GetMethodID"); | |
| 1320 DTRACE_PROBE4(hotspot_jni, GetMethodID__entry, env, clazz, name, sig); | |
| 1321 jmethodID ret = get_method_id(env, clazz, name, sig, false, thread); | |
| 1322 DTRACE_PROBE1(hotspot_jni, GetMethodID__return, ret); | |
| 1323 return ret; | |
| 1324 JNI_END | |
| 1325 | |
| 1326 | |
| 1327 JNI_ENTRY(jmethodID, jni_GetStaticMethodID(JNIEnv *env, jclass clazz, | |
| 1328 const char *name, const char *sig)) | |
| 1329 JNIWrapper("GetStaticMethodID"); | |
| 1330 DTRACE_PROBE4(hotspot_jni, GetStaticMethodID__entry, env, clazz, name, sig); | |
| 1331 jmethodID ret = get_method_id(env, clazz, name, sig, true, thread); | |
| 1332 DTRACE_PROBE1(hotspot_jni, GetStaticMethodID__return, ret); | |
| 1333 return ret; | |
| 1334 JNI_END | |
| 1335 | |
| 1336 | |
| 1337 | |
| 1338 // | |
| 1339 // Calling Methods | |
| 1340 // | |
| 1341 | |
| 1342 | |
| 1343 #define DEFINE_CALLMETHOD(ResultType, Result, Tag) \ | |
| 1344 \ | |
| 1345 DT_RETURN_MARK_DECL_FOR(Result, Call##Result##Method, ResultType);\ | |
| 1346 DT_RETURN_MARK_DECL_FOR(Result, Call##Result##MethodV, ResultType);\ | |
| 1347 DT_RETURN_MARK_DECL_FOR(Result, Call##Result##MethodA, ResultType);\ | |
| 1348 \ | |
| 1349 JNI_ENTRY(ResultType, \ | |
| 1350 jni_Call##Result##Method(JNIEnv *env, jobject obj, jmethodID methodID, ...)) \ | |
| 1351 JNIWrapper("Call" XSTR(Result) "Method"); \ | |
| 1352 \ | |
| 1353 DTRACE_PROBE3(hotspot_jni, Call##Result##Method__entry, env, obj, methodID);\ | |
| 1354 ResultType ret = 0;\ | |
| 1355 DT_RETURN_MARK_FOR(Result, Call##Result##Method, ResultType, \ | |
| 1356 (const ResultType&)ret);\ | |
| 1357 \ | |
| 1358 va_list args; \ | |
| 1359 va_start(args, methodID); \ | |
| 1360 JavaValue jvalue(Tag); \ | |
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1361 JNI_ArgumentPusherVaArg ap(methodID, args); \ |
| 0 | 1362 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK_0); \ |
| 1363 va_end(args); \ | |
| 1364 ret = jvalue.get_##ResultType(); \ | |
| 1365 return ret;\ | |
| 1366 JNI_END \ | |
| 1367 \ | |
| 1368 \ | |
| 1369 JNI_ENTRY(ResultType, \ | |
| 1370 jni_Call##Result##MethodV(JNIEnv *env, jobject obj, jmethodID methodID, va_list args)) \ | |
| 1371 JNIWrapper("Call" XSTR(Result) "MethodV"); \ | |
| 1372 \ | |
| 1373 DTRACE_PROBE3(hotspot_jni, Call##Result##MethodV__entry, env, obj, methodID);\ | |
| 1374 ResultType ret = 0;\ | |
| 1375 DT_RETURN_MARK_FOR(Result, Call##Result##MethodV, ResultType, \ | |
| 1376 (const ResultType&)ret);\ | |
| 1377 \ | |
| 1378 JavaValue jvalue(Tag); \ | |
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1379 JNI_ArgumentPusherVaArg ap(methodID, args); \ |
| 0 | 1380 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK_0); \ |
| 1381 ret = jvalue.get_##ResultType(); \ | |
| 1382 return ret;\ | |
| 1383 JNI_END \ | |
| 1384 \ | |
| 1385 \ | |
| 1386 JNI_ENTRY(ResultType, \ | |
| 1387 jni_Call##Result##MethodA(JNIEnv *env, jobject obj, jmethodID methodID, const jvalue *args)) \ | |
| 1388 JNIWrapper("Call" XSTR(Result) "MethodA"); \ | |
| 1389 DTRACE_PROBE3(hotspot_jni, Call##Result##MethodA__entry, env, obj, methodID);\ | |
| 1390 ResultType ret = 0;\ | |
| 1391 DT_RETURN_MARK_FOR(Result, Call##Result##MethodA, ResultType, \ | |
| 1392 (const ResultType&)ret);\ | |
| 1393 \ | |
| 1394 JavaValue jvalue(Tag); \ | |
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1395 JNI_ArgumentPusherArray ap(methodID, args); \ |
| 0 | 1396 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK_0); \ |
| 1397 ret = jvalue.get_##ResultType(); \ | |
| 1398 return ret;\ | |
| 1399 JNI_END | |
| 1400 | |
| 1401 // the runtime type of subword integral basic types is integer | |
| 1402 DEFINE_CALLMETHOD(jboolean, Boolean, T_BOOLEAN) | |
| 1403 DEFINE_CALLMETHOD(jbyte, Byte, T_BYTE) | |
| 1404 DEFINE_CALLMETHOD(jchar, Char, T_CHAR) | |
| 1405 DEFINE_CALLMETHOD(jshort, Short, T_SHORT) | |
| 1406 | |
| 1407 DEFINE_CALLMETHOD(jobject, Object, T_OBJECT) | |
| 1408 DEFINE_CALLMETHOD(jint, Int, T_INT) | |
| 1409 DEFINE_CALLMETHOD(jlong, Long, T_LONG) | |
| 1410 DEFINE_CALLMETHOD(jfloat, Float, T_FLOAT) | |
| 1411 DEFINE_CALLMETHOD(jdouble, Double, T_DOUBLE) | |
| 1412 | |
| 1413 DT_VOID_RETURN_MARK_DECL(CallVoidMethod); | |
| 1414 DT_VOID_RETURN_MARK_DECL(CallVoidMethodV); | |
| 1415 DT_VOID_RETURN_MARK_DECL(CallVoidMethodA); | |
| 1416 | |
| 1417 JNI_ENTRY(void, jni_CallVoidMethod(JNIEnv *env, jobject obj, jmethodID methodID, ...)) | |
| 1418 JNIWrapper("CallVoidMethod"); | |
| 1419 DTRACE_PROBE3(hotspot_jni, CallVoidMethod__entry, env, obj, methodID); | |
| 1420 DT_VOID_RETURN_MARK(CallVoidMethod); | |
| 1421 | |
| 1422 va_list args; | |
| 1423 va_start(args, methodID); | |
| 1424 JavaValue jvalue(T_VOID); | |
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1425 JNI_ArgumentPusherVaArg ap(methodID, args); |
| 0 | 1426 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK); |
| 1427 va_end(args); | |
| 1428 JNI_END | |
| 1429 | |
| 1430 | |
| 1431 JNI_ENTRY(void, jni_CallVoidMethodV(JNIEnv *env, jobject obj, jmethodID methodID, va_list args)) | |
| 1432 JNIWrapper("CallVoidMethodV"); | |
| 1433 DTRACE_PROBE3(hotspot_jni, CallVoidMethodV__entry, env, obj, methodID); | |
| 1434 DT_VOID_RETURN_MARK(CallVoidMethodV); | |
| 1435 | |
| 1436 JavaValue jvalue(T_VOID); | |
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1437 JNI_ArgumentPusherVaArg ap(methodID, args); |
| 0 | 1438 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK); |
| 1439 JNI_END | |
| 1440 | |
| 1441 | |
| 1442 JNI_ENTRY(void, jni_CallVoidMethodA(JNIEnv *env, jobject obj, jmethodID methodID, const jvalue *args)) | |
| 1443 JNIWrapper("CallVoidMethodA"); | |
| 1444 DTRACE_PROBE3(hotspot_jni, CallVoidMethodA__entry, env, obj, methodID); | |
| 1445 DT_VOID_RETURN_MARK(CallVoidMethodA); | |
| 1446 | |
| 1447 JavaValue jvalue(T_VOID); | |
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1448 JNI_ArgumentPusherArray ap(methodID, args); |
| 0 | 1449 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK); |
| 1450 JNI_END | |
| 1451 | |
| 1452 | |
| 1453 #define DEFINE_CALLNONVIRTUALMETHOD(ResultType, Result, Tag) \ | |
| 1454 \ | |
| 1455 DT_RETURN_MARK_DECL_FOR(Result, CallNonvirtual##Result##Method, ResultType);\ | |
| 1456 DT_RETURN_MARK_DECL_FOR(Result, CallNonvirtual##Result##MethodV, ResultType);\ | |
| 1457 DT_RETURN_MARK_DECL_FOR(Result, CallNonvirtual##Result##MethodA, ResultType);\ | |
| 1458 \ | |
| 1459 JNI_ENTRY(ResultType, \ | |
| 1460 jni_CallNonvirtual##Result##Method(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, ...)) \ | |
| 1461 JNIWrapper("CallNonvitual" XSTR(Result) "Method"); \ | |
| 1462 \ | |
| 1463 DTRACE_PROBE4(hotspot_jni, CallNonvirtual##Result##Method__entry, env, obj, cls, methodID);\ | |
| 1464 ResultType ret;\ | |
| 1465 DT_RETURN_MARK_FOR(Result, CallNonvirtual##Result##Method, ResultType, \ | |
| 1466 (const ResultType&)ret);\ | |
| 1467 \ | |
| 1468 va_list args; \ | |
| 1469 va_start(args, methodID); \ | |
| 1470 JavaValue jvalue(Tag); \ | |
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1471 JNI_ArgumentPusherVaArg ap(methodID, args); \ |
| 0 | 1472 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_0); \ |
| 1473 va_end(args); \ | |
| 1474 ret = jvalue.get_##ResultType(); \ | |
| 1475 return ret;\ | |
| 1476 JNI_END \ | |
| 1477 \ | |
| 1478 JNI_ENTRY(ResultType, \ | |
| 1479 jni_CallNonvirtual##Result##MethodV(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, va_list args)) \ | |
| 1480 JNIWrapper("CallNonvitual" XSTR(Result) "#MethodV"); \ | |
| 1481 DTRACE_PROBE4(hotspot_jni, CallNonvirtual##Result##MethodV__entry, env, obj, cls, methodID);\ | |
| 1482 ResultType ret;\ | |
| 1483 DT_RETURN_MARK_FOR(Result, CallNonvirtual##Result##MethodV, ResultType, \ | |
| 1484 (const ResultType&)ret);\ | |
| 1485 \ | |
| 1486 JavaValue jvalue(Tag); \ | |
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1487 JNI_ArgumentPusherVaArg ap(methodID, args); \ |
| 0 | 1488 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_0); \ |
| 1489 ret = jvalue.get_##ResultType(); \ | |
| 1490 return ret;\ | |
| 1491 JNI_END \ | |
| 1492 \ | |
| 1493 JNI_ENTRY(ResultType, \ | |
| 1494 jni_CallNonvirtual##Result##MethodA(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, const jvalue *args)) \ | |
| 1495 JNIWrapper("CallNonvitual" XSTR(Result) "MethodA"); \ | |
| 1496 DTRACE_PROBE4(hotspot_jni, CallNonvirtual##Result##MethodA__entry, env, obj, cls, methodID);\ | |
| 1497 ResultType ret;\ | |
| 1498 DT_RETURN_MARK_FOR(Result, CallNonvirtual##Result##MethodA, ResultType, \ | |
| 1499 (const ResultType&)ret);\ | |
| 1500 \ | |
| 1501 JavaValue jvalue(Tag); \ | |
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1502 JNI_ArgumentPusherArray ap(methodID, args); \ |
| 0 | 1503 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_0); \ |
| 1504 ret = jvalue.get_##ResultType(); \ | |
| 1505 return ret;\ | |
| 1506 JNI_END | |
| 1507 | |
| 1508 // the runtime type of subword integral basic types is integer | |
| 1509 DEFINE_CALLNONVIRTUALMETHOD(jboolean, Boolean, T_BOOLEAN) | |
| 1510 DEFINE_CALLNONVIRTUALMETHOD(jbyte, Byte, T_BYTE) | |
| 1511 DEFINE_CALLNONVIRTUALMETHOD(jchar, Char, T_CHAR) | |
| 1512 DEFINE_CALLNONVIRTUALMETHOD(jshort, Short, T_SHORT) | |
| 1513 | |
| 1514 DEFINE_CALLNONVIRTUALMETHOD(jobject, Object, T_OBJECT) | |
| 1515 DEFINE_CALLNONVIRTUALMETHOD(jint, Int, T_INT) | |
| 1516 DEFINE_CALLNONVIRTUALMETHOD(jlong, Long, T_LONG) | |
| 1517 DEFINE_CALLNONVIRTUALMETHOD(jfloat, Float, T_FLOAT) | |
| 1518 DEFINE_CALLNONVIRTUALMETHOD(jdouble, Double, T_DOUBLE) | |
| 1519 | |
| 1520 | |
| 1521 DT_VOID_RETURN_MARK_DECL(CallNonvirtualVoidMethod); | |
| 1522 DT_VOID_RETURN_MARK_DECL(CallNonvirtualVoidMethodV); | |
| 1523 DT_VOID_RETURN_MARK_DECL(CallNonvirtualVoidMethodA); | |
| 1524 | |
| 1525 JNI_ENTRY(void, jni_CallNonvirtualVoidMethod(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, ...)) | |
| 1526 JNIWrapper("CallNonvirtualVoidMethod"); | |
| 1527 | |
| 1528 DTRACE_PROBE4(hotspot_jni, CallNonvirtualVoidMethod__entry, | |
| 1529 env, obj, cls, methodID); | |
| 1530 DT_VOID_RETURN_MARK(CallNonvirtualVoidMethod); | |
| 1531 | |
| 1532 va_list args; | |
| 1533 va_start(args, methodID); | |
| 1534 JavaValue jvalue(T_VOID); | |
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1535 JNI_ArgumentPusherVaArg ap(methodID, args); |
| 0 | 1536 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK); |
| 1537 va_end(args); | |
| 1538 JNI_END | |
| 1539 | |
| 1540 | |
| 1541 JNI_ENTRY(void, jni_CallNonvirtualVoidMethodV(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, va_list args)) | |
| 1542 JNIWrapper("CallNonvirtualVoidMethodV"); | |
| 1543 | |
| 1544 DTRACE_PROBE4(hotspot_jni, CallNonvirtualVoidMethodV__entry, | |
| 1545 env, obj, cls, methodID); | |
| 1546 DT_VOID_RETURN_MARK(CallNonvirtualVoidMethodV); | |
| 1547 | |
| 1548 JavaValue jvalue(T_VOID); | |
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1549 JNI_ArgumentPusherVaArg ap(methodID, args); |
| 0 | 1550 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK); |
| 1551 JNI_END | |
| 1552 | |
| 1553 | |
| 1554 JNI_ENTRY(void, jni_CallNonvirtualVoidMethodA(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, const jvalue *args)) | |
| 1555 JNIWrapper("CallNonvirtualVoidMethodA"); | |
| 1556 DTRACE_PROBE4(hotspot_jni, CallNonvirtualVoidMethodA__entry, | |
| 1557 env, obj, cls, methodID); | |
| 1558 DT_VOID_RETURN_MARK(CallNonvirtualVoidMethodA); | |
| 1559 JavaValue jvalue(T_VOID); | |
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1560 JNI_ArgumentPusherArray ap(methodID, args); |
| 0 | 1561 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK); |
| 1562 JNI_END | |
| 1563 | |
| 1564 | |
| 1565 #define DEFINE_CALLSTATICMETHOD(ResultType, Result, Tag) \ | |
| 1566 \ | |
| 1567 DT_RETURN_MARK_DECL_FOR(Result, CallStatic##Result##Method, ResultType);\ | |
| 1568 DT_RETURN_MARK_DECL_FOR(Result, CallStatic##Result##MethodV, ResultType);\ | |
| 1569 DT_RETURN_MARK_DECL_FOR(Result, CallStatic##Result##MethodA, ResultType);\ | |
| 1570 \ | |
| 1571 JNI_ENTRY(ResultType, \ | |
| 1572 jni_CallStatic##Result##Method(JNIEnv *env, jclass cls, jmethodID methodID, ...)) \ | |
| 1573 JNIWrapper("CallStatic" XSTR(Result) "Method"); \ | |
| 1574 \ | |
| 1575 DTRACE_PROBE3(hotspot_jni, CallStatic##Result##Method__entry, env, cls, methodID);\ | |
| 1576 ResultType ret = 0;\ | |
| 1577 DT_RETURN_MARK_FOR(Result, CallStatic##Result##Method, ResultType, \ | |
| 1578 (const ResultType&)ret);\ | |
| 1579 \ | |
| 1580 va_list args; \ | |
| 1581 va_start(args, methodID); \ | |
| 1582 JavaValue jvalue(Tag); \ | |
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1583 JNI_ArgumentPusherVaArg ap(methodID, args); \ |
| 0 | 1584 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK_0); \ |
| 1585 va_end(args); \ | |
| 1586 ret = jvalue.get_##ResultType(); \ | |
| 1587 return ret;\ | |
| 1588 JNI_END \ | |
| 1589 \ | |
| 1590 JNI_ENTRY(ResultType, \ | |
| 1591 jni_CallStatic##Result##MethodV(JNIEnv *env, jclass cls, jmethodID methodID, va_list args)) \ | |
| 1592 JNIWrapper("CallStatic" XSTR(Result) "MethodV"); \ | |
| 1593 DTRACE_PROBE3(hotspot_jni, CallStatic##Result##MethodV__entry, env, cls, methodID);\ | |
| 1594 ResultType ret = 0;\ | |
| 1595 DT_RETURN_MARK_FOR(Result, CallStatic##Result##MethodV, ResultType, \ | |
| 1596 (const ResultType&)ret);\ | |
| 1597 \ | |
| 1598 JavaValue jvalue(Tag); \ | |
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1599 JNI_ArgumentPusherVaArg ap(methodID, args); \ |
| 0 | 1600 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK_0); \ |
| 1601 ret = jvalue.get_##ResultType(); \ | |
| 1602 return ret;\ | |
| 1603 JNI_END \ | |
| 1604 \ | |
| 1605 JNI_ENTRY(ResultType, \ | |
| 1606 jni_CallStatic##Result##MethodA(JNIEnv *env, jclass cls, jmethodID methodID, const jvalue *args)) \ | |
| 1607 JNIWrapper("CallStatic" XSTR(Result) "MethodA"); \ | |
| 1608 DTRACE_PROBE3(hotspot_jni, CallStatic##Result##MethodA__entry, env, cls, methodID);\ | |
| 1609 ResultType ret = 0;\ | |
| 1610 DT_RETURN_MARK_FOR(Result, CallStatic##Result##MethodA, ResultType, \ | |
| 1611 (const ResultType&)ret);\ | |
| 1612 \ | |
| 1613 JavaValue jvalue(Tag); \ | |
|
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1614 JNI_ArgumentPusherArray ap(methodID, args); \ |
| 0 | 1615 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK_0); \ |
| 1616 ret = jvalue.get_##ResultType(); \ | |
| 1617 return ret;\ | |
| 1618 JNI_END | |
| 1619 | |
| 1620 // the runtime type of subword integral basic types is integer | |
| 1621 DEFINE_CALLSTATICMETHOD(jboolean, Boolean, T_BOOLEAN) | |
| 1622 DEFINE_CALLSTATICMETHOD(jbyte, Byte, T_BYTE) | |
| 1623 DEFINE_CALLSTATICMETHOD(jchar, Char, T_CHAR) | |
| 1624 DEFINE_CALLSTATICMETHOD(jshort, Short, T_SHORT) | |
| 1625 | |
| 1626 DEFINE_CALLSTATICMETHOD(jobject, Object, T_OBJECT) | |
| 1627 DEFINE_CALLSTATICMETHOD(jint, Int, T_INT) | |
| 1628 DEFINE_CALLSTATICMETHOD(jlong, Long, T_LONG) | |
| 1629 DEFINE_CALLSTATICMETHOD(jfloat, Float, T_FLOAT) | |
| 1630 DEFINE_CALLSTATICMETHOD(jdouble, Double, T_DOUBLE) | |
| 1631 | |
| 1632 | |
| 1633 DT_VOID_RETURN_MARK_DECL(CallStaticVoidMethod); | |
| 1634 DT_VOID_RETURN_MARK_DECL(CallStaticVoidMethodV); | |
| 1635 DT_VOID_RETURN_MARK_DECL(CallStaticVoidMethodA); | |
| 1636 | |
| 1637 JNI_ENTRY(void, jni_CallStaticVoidMethod(JNIEnv *env, jclass cls, jmethodID methodID, ...)) | |
| 1638 JNIWrapper("CallStaticVoidMethod"); | |
| 1639 DTRACE_PROBE3(hotspot_jni, CallStaticVoidMethod__entry, env, cls, methodID); | |
| 1640 DT_VOID_RETURN_MARK(CallStaticVoidMethod); | |
| 1641 | |
| 1642 va_list args; | |
| 1643 va_start(args, methodID); | |
| 1644 JavaValue jvalue(T_VOID); | |
|
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1645 JNI_ArgumentPusherVaArg ap(methodID, args); |
| 0 | 1646 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK); |
| 1647 va_end(args); | |
| 1648 JNI_END | |
| 1649 | |
| 1650 | |
| 1651 JNI_ENTRY(void, jni_CallStaticVoidMethodV(JNIEnv *env, jclass cls, jmethodID methodID, va_list args)) | |
| 1652 JNIWrapper("CallStaticVoidMethodV"); | |
| 1653 DTRACE_PROBE3(hotspot_jni, CallStaticVoidMethodV__entry, env, cls, methodID); | |
| 1654 DT_VOID_RETURN_MARK(CallStaticVoidMethodV); | |
| 1655 | |
| 1656 JavaValue jvalue(T_VOID); | |
|
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1657 JNI_ArgumentPusherVaArg ap(methodID, args); |
| 0 | 1658 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK); |
| 1659 JNI_END | |
| 1660 | |
| 1661 | |
| 1662 JNI_ENTRY(void, jni_CallStaticVoidMethodA(JNIEnv *env, jclass cls, jmethodID methodID, const jvalue *args)) | |
| 1663 JNIWrapper("CallStaticVoidMethodA"); | |
| 1664 DTRACE_PROBE3(hotspot_jni, CallStaticVoidMethodA__entry, env, cls, methodID); | |
| 1665 DT_VOID_RETURN_MARK(CallStaticVoidMethodA); | |
| 1666 | |
| 1667 JavaValue jvalue(T_VOID); | |
|
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1668 JNI_ArgumentPusherArray ap(methodID, args); |
| 0 | 1669 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK); |
| 1670 JNI_END | |
| 1671 | |
| 1672 | |
| 1673 // | |
| 1674 // Accessing Fields | |
| 1675 // | |
| 1676 | |
| 1677 | |
| 1678 DT_RETURN_MARK_DECL(GetFieldID, jfieldID); | |
| 1679 | |
| 1680 JNI_ENTRY(jfieldID, jni_GetFieldID(JNIEnv *env, jclass clazz, | |
| 1681 const char *name, const char *sig)) | |
| 1682 JNIWrapper("GetFieldID"); | |
| 1683 DTRACE_PROBE4(hotspot_jni, GetFieldID__entry, env, clazz, name, sig); | |
| 1684 jfieldID ret = 0; | |
| 1685 DT_RETURN_MARK(GetFieldID, jfieldID, (const jfieldID&)ret); | |
| 1686 | |
| 1687 // The class should have been loaded (we have an instance of the class | |
| 1688 // passed in) so the field and signature should already be in the symbol | |
| 1689 // table. If they're not there, the field doesn't exist. | |
|
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1690 TempNewSymbol fieldname = SymbolTable::probe(name, (int)strlen(name)); |
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1691 TempNewSymbol signame = SymbolTable::probe(sig, (int)strlen(sig)); |
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1692 if (fieldname == NULL || signame == NULL) { |
| 0 | 1693 THROW_MSG_0(vmSymbols::java_lang_NoSuchFieldError(), (char*) name); |
| 1694 } | |
| 1695 KlassHandle k(THREAD, | |
| 1696 java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(clazz))); | |
| 1697 // Make sure class is initialized before handing id's out to fields | |
| 1698 Klass::cast(k())->initialize(CHECK_NULL); | |
| 1699 | |
| 1700 fieldDescriptor fd; | |
| 1701 if (!Klass::cast(k())->oop_is_instance() || | |
|
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1702 !instanceKlass::cast(k())->find_field(fieldname, signame, false, &fd)) { |
| 0 | 1703 THROW_MSG_0(vmSymbols::java_lang_NoSuchFieldError(), (char*) name); |
| 1704 } | |
| 1705 | |
| 1706 // A jfieldID for a non-static field is simply the offset of the field within the instanceOop | |
| 1707 // It may also have hash bits for k, if VerifyJNIFields is turned on. | |
| 1708 ret = jfieldIDWorkaround::to_instance_jfieldID(k(), fd.offset()); | |
| 1709 return ret; | |
| 1710 JNI_END | |
| 1711 | |
| 1712 | |
| 1713 JNI_ENTRY(jobject, jni_GetObjectField(JNIEnv *env, jobject obj, jfieldID fieldID)) | |
| 1714 JNIWrapper("GetObjectField"); | |
| 1715 DTRACE_PROBE3(hotspot_jni, GetObjectField__entry, env, obj, fieldID); | |
| 1716 oop o = JNIHandles::resolve_non_null(obj); | |
| 1717 klassOop k = o->klass(); | |
| 1718 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID); | |
| 1719 // Keep JVMTI addition small and only check enabled flag here. | |
| 1720 // jni_GetField_probe() assumes that is okay to create handles. | |
| 1721 if (JvmtiExport::should_post_field_access()) { | |
| 1722 o = JvmtiExport::jni_GetField_probe(thread, obj, o, k, fieldID, false); | |
| 1723 } | |
| 1724 jobject ret = JNIHandles::make_local(env, o->obj_field(offset)); | |
|
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1725 #ifndef SERIALGC |
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1726 // If G1 is enabled and we are accessing the value of the referent |
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1727 // field in a reference object then we need to register a non-null |
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1728 // referent with the SATB barrier. |
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1729 if (UseG1GC) { |
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1730 bool needs_barrier = false; |
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1731 |
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1732 if (ret != NULL && |
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1733 offset == java_lang_ref_Reference::referent_offset && |
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1734 instanceKlass::cast(k)->reference_type() != REF_NONE) { |
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1735 assert(instanceKlass::cast(k)->is_subclass_of(SystemDictionary::Reference_klass()), "sanity"); |
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1736 needs_barrier = true; |
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1737 } |
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1738 |
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1739 if (needs_barrier) { |
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1740 oop referent = JNIHandles::resolve(ret); |
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1741 G1SATBCardTableModRefBS::enqueue(referent); |
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1742 } |
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1743 } |
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1744 #endif // SERIALGC |
| 0 | 1745 DTRACE_PROBE1(hotspot_jni, GetObjectField__return, ret); |
| 1746 return ret; | |
| 1747 JNI_END | |
| 1748 | |
| 1749 | |
| 1750 #define DEFINE_GETFIELD(Return,Fieldname,Result) \ | |
| 1751 \ | |
| 1752 DT_RETURN_MARK_DECL_FOR(Result, Get##Result##Field, Return);\ | |
| 1753 \ | |
| 1754 JNI_QUICK_ENTRY(Return, jni_Get##Result##Field(JNIEnv *env, jobject obj, jfieldID fieldID)) \ | |
| 1755 JNIWrapper("Get" XSTR(Result) "Field"); \ | |
| 1756 \ | |
| 1757 DTRACE_PROBE3(hotspot_jni, Get##Result##Field__entry, env, obj, fieldID);\ | |
| 1758 Return ret = 0;\ | |
| 1759 DT_RETURN_MARK_FOR(Result, Get##Result##Field, Return, (const Return&)ret);\ | |
| 1760 \ | |
| 1761 oop o = JNIHandles::resolve_non_null(obj); \ | |
| 1762 klassOop k = o->klass(); \ | |
| 1763 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID); \ | |
| 1764 /* Keep JVMTI addition small and only check enabled flag here. */ \ | |
| 1765 /* jni_GetField_probe_nh() assumes that is not okay to create handles */ \ | |
| 1766 /* and creates a ResetNoHandleMark. */ \ | |
| 1767 if (JvmtiExport::should_post_field_access()) { \ | |
| 1768 o = JvmtiExport::jni_GetField_probe_nh(thread, obj, o, k, fieldID, false); \ | |
| 1769 } \ | |
| 1770 ret = o->Fieldname##_field(offset); \ | |
| 1771 return ret; \ | |
| 1772 JNI_END | |
| 1773 | |
| 1774 DEFINE_GETFIELD(jboolean, bool, Boolean) | |
| 1775 DEFINE_GETFIELD(jbyte, byte, Byte) | |
| 1776 DEFINE_GETFIELD(jchar, char, Char) | |
| 1777 DEFINE_GETFIELD(jshort, short, Short) | |
| 1778 DEFINE_GETFIELD(jint, int, Int) | |
| 1779 DEFINE_GETFIELD(jlong, long, Long) | |
| 1780 DEFINE_GETFIELD(jfloat, float, Float) | |
| 1781 DEFINE_GETFIELD(jdouble, double, Double) | |
| 1782 | |
| 1783 address jni_GetBooleanField_addr() { | |
| 1784 return (address)jni_GetBooleanField; | |
| 1785 } | |
| 1786 address jni_GetByteField_addr() { | |
| 1787 return (address)jni_GetByteField; | |
| 1788 } | |
| 1789 address jni_GetCharField_addr() { | |
| 1790 return (address)jni_GetCharField; | |
| 1791 } | |
| 1792 address jni_GetShortField_addr() { | |
| 1793 return (address)jni_GetShortField; | |
| 1794 } | |
| 1795 address jni_GetIntField_addr() { | |
| 1796 return (address)jni_GetIntField; | |
| 1797 } | |
| 1798 address jni_GetLongField_addr() { | |
| 1799 return (address)jni_GetLongField; | |
| 1800 } | |
| 1801 address jni_GetFloatField_addr() { | |
| 1802 return (address)jni_GetFloatField; | |
| 1803 } | |
| 1804 address jni_GetDoubleField_addr() { | |
| 1805 return (address)jni_GetDoubleField; | |
| 1806 } | |
| 1807 | |
| 1808 JNI_QUICK_ENTRY(void, jni_SetObjectField(JNIEnv *env, jobject obj, jfieldID fieldID, jobject value)) | |
| 1809 JNIWrapper("SetObjectField"); | |
| 1810 DTRACE_PROBE4(hotspot_jni, SetObjectField__entry, env, obj, fieldID, value); | |
| 1811 oop o = JNIHandles::resolve_non_null(obj); | |
| 1812 klassOop k = o->klass(); | |
| 1813 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID); | |
| 1814 // Keep JVMTI addition small and only check enabled flag here. | |
| 1815 // jni_SetField_probe_nh() assumes that is not okay to create handles | |
| 1816 // and creates a ResetNoHandleMark. | |
| 1817 if (JvmtiExport::should_post_field_modification()) { | |
| 1818 jvalue field_value; | |
| 1819 field_value.l = value; | |
| 1820 o = JvmtiExport::jni_SetField_probe_nh(thread, obj, o, k, fieldID, false, 'L', (jvalue *)&field_value); | |
| 1821 } | |
| 1822 o->obj_field_put(offset, JNIHandles::resolve(value)); | |
| 1823 DTRACE_PROBE(hotspot_jni, SetObjectField__return); | |
| 1824 JNI_END | |
| 1825 | |
| 1826 #define DEFINE_SETFIELD(Argument,Fieldname,Result,SigType,unionType) \ | |
| 1827 \ | |
| 1828 JNI_QUICK_ENTRY(void, jni_Set##Result##Field(JNIEnv *env, jobject obj, jfieldID fieldID, Argument value)) \ | |
| 1829 JNIWrapper("Set" XSTR(Result) "Field"); \ | |
| 1830 \ | |
| 1831 HS_DTRACE_PROBE_CDECL_N(hotspot_jni, Set##Result##Field__entry, \ | |
| 1832 ( JNIEnv*, jobject, jfieldID FP_SELECT_##Result(COMMA Argument,/*empty*/) ) ); \ | |
| 1833 HS_DTRACE_PROBE_N(hotspot_jni, Set##Result##Field__entry, \ | |
| 1834 ( env, obj, fieldID FP_SELECT_##Result(COMMA value,/*empty*/) ) ); \ | |
| 1835 \ | |
| 1836 oop o = JNIHandles::resolve_non_null(obj); \ | |
| 1837 klassOop k = o->klass(); \ | |
| 1838 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID); \ | |
| 1839 /* Keep JVMTI addition small and only check enabled flag here. */ \ | |
| 1840 /* jni_SetField_probe_nh() assumes that is not okay to create handles */ \ | |
| 1841 /* and creates a ResetNoHandleMark. */ \ | |
| 1842 if (JvmtiExport::should_post_field_modification()) { \ | |
| 1843 jvalue field_value; \ | |
| 1844 field_value.unionType = value; \ | |
| 1845 o = JvmtiExport::jni_SetField_probe_nh(thread, obj, o, k, fieldID, false, SigType, (jvalue *)&field_value); \ | |
| 1846 } \ | |
| 1847 o->Fieldname##_field_put(offset, value); \ | |
| 1848 DTRACE_PROBE(hotspot_jni, Set##Result##Field__return);\ | |
| 1849 JNI_END | |
| 1850 | |
| 1851 DEFINE_SETFIELD(jboolean, bool, Boolean, 'Z', z) | |
| 1852 DEFINE_SETFIELD(jbyte, byte, Byte, 'B', b) | |
| 1853 DEFINE_SETFIELD(jchar, char, Char, 'C', c) | |
| 1854 DEFINE_SETFIELD(jshort, short, Short, 'S', s) | |
| 1855 DEFINE_SETFIELD(jint, int, Int, 'I', i) | |
| 1856 DEFINE_SETFIELD(jlong, long, Long, 'J', j) | |
| 1857 DEFINE_SETFIELD(jfloat, float, Float, 'F', f) | |
| 1858 DEFINE_SETFIELD(jdouble, double, Double, 'D', d) | |
| 1859 | |
| 1860 DT_RETURN_MARK_DECL(ToReflectedField, jobject); | |
| 1861 | |
| 1862 JNI_ENTRY(jobject, jni_ToReflectedField(JNIEnv *env, jclass cls, jfieldID fieldID, jboolean isStatic)) | |
| 1863 JNIWrapper("ToReflectedField"); | |
| 1864 DTRACE_PROBE4(hotspot_jni, ToReflectedField__entry, | |
| 1865 env, cls, fieldID, isStatic); | |
| 1866 jobject ret = NULL; | |
| 1867 DT_RETURN_MARK(ToReflectedField, jobject, (const jobject&)ret); | |
| 1868 | |
| 1869 fieldDescriptor fd; | |
| 1870 bool found = false; | |
| 1871 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); | |
| 1872 | |
| 1873 assert(jfieldIDWorkaround::is_static_jfieldID(fieldID) == (isStatic != 0), "invalid fieldID"); | |
| 1874 | |
| 1875 if (isStatic) { | |
| 1876 // Static field. The fieldID a JNIid specifying the field holder and the offset within the klassOop. | |
| 1877 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID); | |
| 1878 assert(id->is_static_field_id(), "invalid static field id"); | |
|
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1879 found = id->find_local_field(&fd); |
| 0 | 1880 } else { |
| 1881 // Non-static field. The fieldID is really the offset of the field within the instanceOop. | |
| 1882 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID); | |
| 1883 found = instanceKlass::cast(k)->find_field_from_offset(offset, false, &fd); | |
| 1884 } | |
| 1885 assert(found, "bad fieldID passed into jni_ToReflectedField"); | |
| 1886 oop reflected = Reflection::new_field(&fd, UseNewReflection, CHECK_NULL); | |
| 1887 ret = JNIHandles::make_local(env, reflected); | |
| 1888 return ret; | |
| 1889 JNI_END | |
| 1890 | |
| 1891 | |
| 1892 // | |
| 1893 // Accessing Static Fields | |
| 1894 // | |
| 1895 DT_RETURN_MARK_DECL(GetStaticFieldID, jfieldID); | |
| 1896 | |
| 1897 JNI_ENTRY(jfieldID, jni_GetStaticFieldID(JNIEnv *env, jclass clazz, | |
| 1898 const char *name, const char *sig)) | |
| 1899 JNIWrapper("GetStaticFieldID"); | |
| 1900 DTRACE_PROBE4(hotspot_jni, GetStaticFieldID__entry, env, clazz, name, sig); | |
| 1901 jfieldID ret = NULL; | |
| 1902 DT_RETURN_MARK(GetStaticFieldID, jfieldID, (const jfieldID&)ret); | |
| 1903 | |
| 1904 // The class should have been loaded (we have an instance of the class | |
| 1905 // passed in) so the field and signature should already be in the symbol | |
| 1906 // table. If they're not there, the field doesn't exist. | |
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1907 TempNewSymbol fieldname = SymbolTable::probe(name, (int)strlen(name)); |
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1908 TempNewSymbol signame = SymbolTable::probe(sig, (int)strlen(sig)); |
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1909 if (fieldname == NULL || signame == NULL) { |
| 0 | 1910 THROW_MSG_0(vmSymbols::java_lang_NoSuchFieldError(), (char*) name); |
| 1911 } | |
| 1912 KlassHandle k(THREAD, | |
| 1913 java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(clazz))); | |
| 1914 // Make sure class is initialized before handing id's out to static fields | |
| 1915 Klass::cast(k())->initialize(CHECK_NULL); | |
| 1916 | |
| 1917 fieldDescriptor fd; | |
| 1918 if (!Klass::cast(k())->oop_is_instance() || | |
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1919 !instanceKlass::cast(k())->find_field(fieldname, signame, true, &fd)) { |
| 0 | 1920 THROW_MSG_0(vmSymbols::java_lang_NoSuchFieldError(), (char*) name); |
| 1921 } | |
| 1922 | |
| 1923 // A jfieldID for a static field is a JNIid specifying the field holder and the offset within the klassOop | |
| 1924 JNIid* id = instanceKlass::cast(fd.field_holder())->jni_id_for(fd.offset()); | |
| 1925 debug_only(id->set_is_static_field_id();) | |
| 1926 | |
|
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1927 debug_only(id->verify(fd.field_holder())); |
| 0 | 1928 |
| 1929 ret = jfieldIDWorkaround::to_static_jfieldID(id); | |
| 1930 return ret; | |
| 1931 JNI_END | |
| 1932 | |
| 1933 | |
| 1934 JNI_ENTRY(jobject, jni_GetStaticObjectField(JNIEnv *env, jclass clazz, jfieldID fieldID)) | |
| 1935 JNIWrapper("GetStaticObjectField"); | |
| 1936 DTRACE_PROBE3(hotspot_jni, GetStaticObjectField__entry, env, clazz, fieldID); | |
| 1937 #ifndef JNICHECK_KERNEL | |
| 1938 DEBUG_ONLY(klassOop param_k = jniCheck::validate_class(thread, clazz);) | |
| 1939 #endif // JNICHECK_KERNEL | |
| 1940 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID); | |
| 1941 assert(id->is_static_field_id(), "invalid static field id"); | |
| 1942 // Keep JVMTI addition small and only check enabled flag here. | |
| 1943 // jni_GetField_probe() assumes that is okay to create handles. | |
| 1944 if (JvmtiExport::should_post_field_access()) { | |
| 1945 JvmtiExport::jni_GetField_probe(thread, NULL, NULL, id->holder(), fieldID, true); | |
| 1946 } | |
|
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1947 jobject ret = JNIHandles::make_local(id->holder()->java_mirror()->obj_field(id->offset())); |
| 0 | 1948 DTRACE_PROBE1(hotspot_jni, GetStaticObjectField__return, ret); |
| 1949 return ret; | |
| 1950 JNI_END | |
| 1951 | |
| 1952 #define DEFINE_GETSTATICFIELD(Return,Fieldname,Result) \ | |
| 1953 \ | |
| 1954 DT_RETURN_MARK_DECL_FOR(Result, GetStatic##Result##Field, Return);\ | |
| 1955 \ | |
| 1956 JNI_ENTRY(Return, jni_GetStatic##Result##Field(JNIEnv *env, jclass clazz, jfieldID fieldID)) \ | |
| 1957 JNIWrapper("GetStatic" XSTR(Result) "Field"); \ | |
| 1958 DTRACE_PROBE3(hotspot_jni, GetStatic##Result##Field__entry, env, clazz, fieldID);\ | |
| 1959 Return ret = 0;\ | |
| 1960 DT_RETURN_MARK_FOR(Result, GetStatic##Result##Field, Return, \ | |
| 1961 (const Return&)ret);\ | |
| 1962 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID); \ | |
| 1963 assert(id->is_static_field_id(), "invalid static field id"); \ | |
| 1964 /* Keep JVMTI addition small and only check enabled flag here. */ \ | |
| 1965 /* jni_GetField_probe() assumes that is okay to create handles. */ \ | |
| 1966 if (JvmtiExport::should_post_field_access()) { \ | |
| 1967 JvmtiExport::jni_GetField_probe(thread, NULL, NULL, id->holder(), fieldID, true); \ | |
| 1968 } \ | |
|
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1969 ret = id->holder()->java_mirror()-> Fieldname##_field (id->offset()); \ |
| 0 | 1970 return ret;\ |
| 1971 JNI_END | |
| 1972 | |
| 1973 DEFINE_GETSTATICFIELD(jboolean, bool, Boolean) | |
| 1974 DEFINE_GETSTATICFIELD(jbyte, byte, Byte) | |
| 1975 DEFINE_GETSTATICFIELD(jchar, char, Char) | |
| 1976 DEFINE_GETSTATICFIELD(jshort, short, Short) | |
| 1977 DEFINE_GETSTATICFIELD(jint, int, Int) | |
| 1978 DEFINE_GETSTATICFIELD(jlong, long, Long) | |
| 1979 DEFINE_GETSTATICFIELD(jfloat, float, Float) | |
| 1980 DEFINE_GETSTATICFIELD(jdouble, double, Double) | |
| 1981 | |
| 1982 | |
| 1983 JNI_ENTRY(void, jni_SetStaticObjectField(JNIEnv *env, jclass clazz, jfieldID fieldID, jobject value)) | |
| 1984 JNIWrapper("SetStaticObjectField"); | |
| 1985 DTRACE_PROBE4(hotspot_jni, SetStaticObjectField__entry, env, clazz, fieldID, value); | |
| 1986 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID); | |
| 1987 assert(id->is_static_field_id(), "invalid static field id"); | |
| 1988 // Keep JVMTI addition small and only check enabled flag here. | |
| 1989 // jni_SetField_probe() assumes that is okay to create handles. | |
| 1990 if (JvmtiExport::should_post_field_modification()) { | |
| 1991 jvalue field_value; | |
| 1992 field_value.l = value; | |
| 1993 JvmtiExport::jni_SetField_probe(thread, NULL, NULL, id->holder(), fieldID, true, 'L', (jvalue *)&field_value); | |
| 1994 } | |
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1995 id->holder()->java_mirror()->obj_field_put(id->offset(), JNIHandles::resolve(value)); |
| 0 | 1996 DTRACE_PROBE(hotspot_jni, SetStaticObjectField__return); |
| 1997 JNI_END | |
| 1998 | |
| 1999 | |
| 2000 #define DEFINE_SETSTATICFIELD(Argument,Fieldname,Result,SigType,unionType) \ | |
| 2001 \ | |
| 2002 JNI_ENTRY(void, jni_SetStatic##Result##Field(JNIEnv *env, jclass clazz, jfieldID fieldID, Argument value)) \ | |
| 2003 JNIWrapper("SetStatic" XSTR(Result) "Field"); \ | |
| 2004 HS_DTRACE_PROBE_CDECL_N(hotspot_jni, SetStatic##Result##Field__entry,\ | |
| 2005 ( JNIEnv*, jclass, jfieldID FP_SELECT_##Result(COMMA Argument,/*empty*/) ) ); \ | |
| 2006 HS_DTRACE_PROBE_N(hotspot_jni, SetStatic##Result##Field__entry, \ | |
| 2007 ( env, clazz, fieldID FP_SELECT_##Result(COMMA value,/*empty*/) ) ); \ | |
| 2008 \ | |
| 2009 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID); \ | |
| 2010 assert(id->is_static_field_id(), "invalid static field id"); \ | |
| 2011 /* Keep JVMTI addition small and only check enabled flag here. */ \ | |
| 2012 /* jni_SetField_probe() assumes that is okay to create handles. */ \ | |
| 2013 if (JvmtiExport::should_post_field_modification()) { \ | |
| 2014 jvalue field_value; \ | |
| 2015 field_value.unionType = value; \ | |
| 2016 JvmtiExport::jni_SetField_probe(thread, NULL, NULL, id->holder(), fieldID, true, SigType, (jvalue *)&field_value); \ | |
| 2017 } \ | |
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2018 id->holder()->java_mirror()-> Fieldname##_field_put (id->offset(), value); \ |
| 0 | 2019 DTRACE_PROBE(hotspot_jni, SetStatic##Result##Field__return);\ |
| 2020 JNI_END | |
| 2021 | |
| 2022 DEFINE_SETSTATICFIELD(jboolean, bool, Boolean, 'Z', z) | |
| 2023 DEFINE_SETSTATICFIELD(jbyte, byte, Byte, 'B', b) | |
| 2024 DEFINE_SETSTATICFIELD(jchar, char, Char, 'C', c) | |
| 2025 DEFINE_SETSTATICFIELD(jshort, short, Short, 'S', s) | |
| 2026 DEFINE_SETSTATICFIELD(jint, int, Int, 'I', i) | |
| 2027 DEFINE_SETSTATICFIELD(jlong, long, Long, 'J', j) | |
| 2028 DEFINE_SETSTATICFIELD(jfloat, float, Float, 'F', f) | |
| 2029 DEFINE_SETSTATICFIELD(jdouble, double, Double, 'D', d) | |
| 2030 | |
| 2031 | |
| 2032 // | |
| 2033 // String Operations | |
| 2034 // | |
| 2035 | |
| 2036 // Unicode Interface | |
| 2037 | |
| 2038 DT_RETURN_MARK_DECL(NewString, jstring); | |
| 2039 | |
| 2040 JNI_ENTRY(jstring, jni_NewString(JNIEnv *env, const jchar *unicodeChars, jsize len)) | |
| 2041 JNIWrapper("NewString"); | |
| 2042 DTRACE_PROBE3(hotspot_jni, NewString__entry, env, unicodeChars, len); | |
| 2043 jstring ret = NULL; | |
| 2044 DT_RETURN_MARK(NewString, jstring, (const jstring&)ret); | |
| 2045 oop string=java_lang_String::create_oop_from_unicode((jchar*) unicodeChars, len, CHECK_NULL); | |
| 2046 ret = (jstring) JNIHandles::make_local(env, string); | |
| 2047 return ret; | |
| 2048 JNI_END | |
| 2049 | |
| 2050 | |
| 2051 JNI_QUICK_ENTRY(jsize, jni_GetStringLength(JNIEnv *env, jstring string)) | |
| 2052 JNIWrapper("GetStringLength"); | |
| 2053 DTRACE_PROBE2(hotspot_jni, GetStringLength__entry, env, string); | |
| 2054 jsize ret = java_lang_String::length(JNIHandles::resolve_non_null(string)); | |
| 2055 DTRACE_PROBE1(hotspot_jni, GetStringLength__return, ret); | |
| 2056 return ret; | |
| 2057 JNI_END | |
| 2058 | |
| 2059 | |
| 2060 JNI_QUICK_ENTRY(const jchar*, jni_GetStringChars( | |
| 2061 JNIEnv *env, jstring string, jboolean *isCopy)) | |
| 2062 JNIWrapper("GetStringChars"); | |
| 2063 DTRACE_PROBE3(hotspot_jni, GetStringChars__entry, env, string, isCopy); | |
| 2064 //%note jni_5 | |
| 2065 if (isCopy != NULL) { | |
| 2066 *isCopy = JNI_TRUE; | |
| 2067 } | |
| 2068 oop s = JNIHandles::resolve_non_null(string); | |
| 2069 int s_len = java_lang_String::length(s); | |
| 2070 typeArrayOop s_value = java_lang_String::value(s); | |
| 2071 int s_offset = java_lang_String::offset(s); | |
| 2072 jchar* buf = NEW_C_HEAP_ARRAY(jchar, s_len + 1); // add one for zero termination | |
| 2073 if (s_len > 0) { | |
| 2074 memcpy(buf, s_value->char_at_addr(s_offset), sizeof(jchar)*s_len); | |
| 2075 } | |
| 2076 buf[s_len] = 0; | |
| 2077 DTRACE_PROBE1(hotspot_jni, GetStringChars__return, buf); | |
| 2078 return buf; | |
| 2079 JNI_END | |
| 2080 | |
| 2081 | |
| 2082 JNI_QUICK_ENTRY(void, jni_ReleaseStringChars(JNIEnv *env, jstring str, const jchar *chars)) | |
| 2083 JNIWrapper("ReleaseStringChars"); | |
| 2084 DTRACE_PROBE3(hotspot_jni, ReleaseStringChars__entry, env, str, chars); | |
| 2085 //%note jni_6 | |
| 2086 if (chars != NULL) { | |
| 2087 // Since String objects are supposed to be immutable, don't copy any | |
| 2088 // new data back. A bad user will have to go after the char array. | |
| 2089 FreeHeap((void*) chars); | |
| 2090 } | |
| 2091 DTRACE_PROBE(hotspot_jni, ReleaseStringChars__return); | |
| 2092 JNI_END | |
| 2093 | |
| 2094 | |
| 2095 // UTF Interface | |
| 2096 | |
| 2097 DT_RETURN_MARK_DECL(NewStringUTF, jstring); | |
| 2098 | |
| 2099 JNI_ENTRY(jstring, jni_NewStringUTF(JNIEnv *env, const char *bytes)) | |
| 2100 JNIWrapper("NewStringUTF"); | |
| 2101 DTRACE_PROBE2(hotspot_jni, NewStringUTF__entry, env, bytes); | |
| 2102 jstring ret; | |
| 2103 DT_RETURN_MARK(NewStringUTF, jstring, (const jstring&)ret); | |
| 2104 | |
| 2105 oop result = java_lang_String::create_oop_from_str((char*) bytes, CHECK_NULL); | |
| 2106 ret = (jstring) JNIHandles::make_local(env, result); | |
| 2107 return ret; | |
| 2108 JNI_END | |
| 2109 | |
| 2110 | |
| 2111 JNI_ENTRY(jsize, jni_GetStringUTFLength(JNIEnv *env, jstring string)) | |
| 2112 JNIWrapper("GetStringUTFLength"); | |
| 2113 DTRACE_PROBE2(hotspot_jni, GetStringUTFLength__entry, env, string); | |
| 2114 jsize ret = java_lang_String::utf8_length(JNIHandles::resolve_non_null(string)); | |
| 2115 DTRACE_PROBE1(hotspot_jni, GetStringUTFLength__return, ret); | |
| 2116 return ret; | |
| 2117 JNI_END | |
| 2118 | |
| 2119 | |
| 2120 JNI_ENTRY(const char*, jni_GetStringUTFChars(JNIEnv *env, jstring string, jboolean *isCopy)) | |
| 2121 JNIWrapper("GetStringUTFChars"); | |
| 2122 DTRACE_PROBE3(hotspot_jni, GetStringUTFChars__entry, env, string, isCopy); | |
|
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2123 oop java_string = JNIHandles::resolve_non_null(string); |
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2124 size_t length = java_lang_String::utf8_length(java_string); |
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2125 char* result = AllocateHeap(length + 1, "GetStringUTFChars"); |
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2126 java_lang_String::as_utf8_string(java_string, result, (int) length + 1); |
| 0 | 2127 if (isCopy != NULL) *isCopy = JNI_TRUE; |
| 2128 DTRACE_PROBE1(hotspot_jni, GetStringUTFChars__return, result); | |
| 2129 return result; | |
| 2130 JNI_END | |
| 2131 | |
| 2132 | |
| 2133 JNI_LEAF(void, jni_ReleaseStringUTFChars(JNIEnv *env, jstring str, const char *chars)) | |
| 2134 JNIWrapper("ReleaseStringUTFChars"); | |
| 2135 DTRACE_PROBE3(hotspot_jni, ReleaseStringUTFChars__entry, env, str, chars); | |
| 2136 if (chars != NULL) { | |
| 2137 FreeHeap((char*) chars); | |
| 2138 } | |
| 2139 DTRACE_PROBE(hotspot_jni, ReleaseStringUTFChars__return); | |
| 2140 JNI_END | |
| 2141 | |
| 2142 | |
| 2143 JNI_QUICK_ENTRY(jsize, jni_GetArrayLength(JNIEnv *env, jarray array)) | |
| 2144 JNIWrapper("GetArrayLength"); | |
| 2145 DTRACE_PROBE2(hotspot_jni, GetArrayLength__entry, env, array); | |
| 2146 arrayOop a = arrayOop(JNIHandles::resolve_non_null(array)); | |
| 2147 assert(a->is_array(), "must be array"); | |
| 2148 jsize ret = a->length(); | |
| 2149 DTRACE_PROBE1(hotspot_jni, GetArrayLength__return, ret); | |
| 2150 return ret; | |
| 2151 JNI_END | |
| 2152 | |
| 2153 | |
| 2154 // | |
| 2155 // Object Array Operations | |
| 2156 // | |
| 2157 | |
| 2158 DT_RETURN_MARK_DECL(NewObjectArray, jobjectArray); | |
| 2159 | |
| 2160 JNI_ENTRY(jobjectArray, jni_NewObjectArray(JNIEnv *env, jsize length, jclass elementClass, jobject initialElement)) | |
| 2161 JNIWrapper("NewObjectArray"); | |
| 2162 DTRACE_PROBE4(hotspot_jni, NewObjectArray__entry, env, length, elementClass, initialElement); | |
| 2163 jobjectArray ret = NULL; | |
| 2164 DT_RETURN_MARK(NewObjectArray, jobjectArray, (const jobjectArray&)ret); | |
| 2165 KlassHandle ek(THREAD, java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(elementClass))); | |
| 2166 klassOop ako = Klass::cast(ek())->array_klass(CHECK_NULL); | |
| 2167 KlassHandle ak = KlassHandle(THREAD, ako); | |
| 2168 objArrayKlass::cast(ak())->initialize(CHECK_NULL); | |
| 2169 objArrayOop result = objArrayKlass::cast(ak())->allocate(length, CHECK_NULL); | |
| 2170 oop initial_value = JNIHandles::resolve(initialElement); | |
| 2171 if (initial_value != NULL) { // array already initialized with NULL | |
| 2172 for (int index = 0; index < length; index++) { | |
| 2173 result->obj_at_put(index, initial_value); | |
| 2174 } | |
| 2175 } | |
| 2176 ret = (jobjectArray) JNIHandles::make_local(env, result); | |
| 2177 return ret; | |
| 2178 JNI_END | |
| 2179 | |
| 2180 DT_RETURN_MARK_DECL(GetObjectArrayElement, jobject); | |
| 2181 | |
| 2182 JNI_ENTRY(jobject, jni_GetObjectArrayElement(JNIEnv *env, jobjectArray array, jsize index)) | |
| 2183 JNIWrapper("GetObjectArrayElement"); | |
| 2184 DTRACE_PROBE3(hotspot_jni, GetObjectArrayElement__entry, env, array, index); | |
| 2185 jobject ret = NULL; | |
| 2186 DT_RETURN_MARK(GetObjectArrayElement, jobject, (const jobject&)ret); | |
| 2187 objArrayOop a = objArrayOop(JNIHandles::resolve_non_null(array)); | |
| 2188 if (a->is_within_bounds(index)) { | |
|
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2189 ret = JNIHandles::make_local(env, a->obj_at(index)); |
| 0 | 2190 return ret; |
| 2191 } else { | |
| 2192 char buf[jintAsStringSize]; | |
| 2193 sprintf(buf, "%d", index); | |
| 2194 THROW_MSG_0(vmSymbols::java_lang_ArrayIndexOutOfBoundsException(), buf); | |
| 2195 } | |
| 2196 JNI_END | |
| 2197 | |
| 2198 DT_VOID_RETURN_MARK_DECL(SetObjectArrayElement); | |
| 2199 | |
| 2200 JNI_ENTRY(void, jni_SetObjectArrayElement(JNIEnv *env, jobjectArray array, jsize index, jobject value)) | |
| 2201 JNIWrapper("SetObjectArrayElement"); | |
| 2202 DTRACE_PROBE4(hotspot_jni, SetObjectArrayElement__entry, env, array, index, value); | |
| 2203 DT_VOID_RETURN_MARK(SetObjectArrayElement); | |
| 2204 | |
| 2205 objArrayOop a = objArrayOop(JNIHandles::resolve_non_null(array)); | |
| 2206 oop v = JNIHandles::resolve(value); | |
| 2207 if (a->is_within_bounds(index)) { | |
| 2208 if (v == NULL || v->is_a(objArrayKlass::cast(a->klass())->element_klass())) { | |
| 2209 a->obj_at_put(index, v); | |
| 2210 } else { | |
| 2211 THROW(vmSymbols::java_lang_ArrayStoreException()); | |
| 2212 } | |
| 2213 } else { | |
| 2214 char buf[jintAsStringSize]; | |
| 2215 sprintf(buf, "%d", index); | |
| 2216 THROW_MSG(vmSymbols::java_lang_ArrayIndexOutOfBoundsException(), buf); | |
| 2217 } | |
| 2218 JNI_END | |
| 2219 | |
| 2220 | |
| 2221 #define DEFINE_NEWSCALARARRAY(Return,Allocator,Result) \ | |
| 2222 \ | |
|
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2223 DT_RETURN_MARK_DECL(New##Result##Array, Return);\ |
| 0 | 2224 \ |
| 2225 JNI_ENTRY(Return, \ | |
| 2226 jni_New##Result##Array(JNIEnv *env, jsize len)) \ | |
| 2227 JNIWrapper("New" XSTR(Result) "Array"); \ | |
| 2228 DTRACE_PROBE2(hotspot_jni, New##Result##Array__entry, env, len);\ | |
| 2229 Return ret = NULL;\ | |
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2230 DT_RETURN_MARK(New##Result##Array, Return, (const Return&)ret);\ |
| 0 | 2231 \ |
| 2232 oop obj= oopFactory::Allocator(len, CHECK_0); \ | |
| 2233 ret = (Return) JNIHandles::make_local(env, obj); \ | |
| 2234 return ret;\ | |
| 2235 JNI_END | |
| 2236 | |
| 2237 DEFINE_NEWSCALARARRAY(jbooleanArray, new_boolArray, Boolean) | |
| 2238 DEFINE_NEWSCALARARRAY(jbyteArray, new_byteArray, Byte) | |
| 2239 DEFINE_NEWSCALARARRAY(jshortArray, new_shortArray, Short) | |
| 2240 DEFINE_NEWSCALARARRAY(jcharArray, new_charArray, Char) | |
| 2241 DEFINE_NEWSCALARARRAY(jintArray, new_intArray, Int) | |
| 2242 DEFINE_NEWSCALARARRAY(jlongArray, new_longArray, Long) | |
| 2243 DEFINE_NEWSCALARARRAY(jfloatArray, new_singleArray, Float) | |
| 2244 DEFINE_NEWSCALARARRAY(jdoubleArray, new_doubleArray, Double) | |
| 2245 | |
| 2246 | |
| 2247 // Return an address which will fault if the caller writes to it. | |
| 2248 | |
| 2249 static char* get_bad_address() { | |
| 2250 static char* bad_address = NULL; | |
| 2251 if (bad_address == NULL) { | |
| 2252 size_t size = os::vm_allocation_granularity(); | |
| 2253 bad_address = os::reserve_memory(size); | |
| 2254 if (bad_address != NULL) { | |
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2255 os::protect_memory(bad_address, size, os::MEM_PROT_READ, |
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2256 /*is_committed*/false); |
| 0 | 2257 } |
| 2258 } | |
| 2259 return bad_address; | |
| 2260 } | |
| 2261 | |
| 2262 | |
| 2263 #define DEFINE_GETSCALARARRAYELEMENTS(ElementTag,ElementType,Result, Tag) \ | |
| 2264 \ | |
| 2265 JNI_QUICK_ENTRY(ElementType*, \ | |
| 2266 jni_Get##Result##ArrayElements(JNIEnv *env, ElementType##Array array, jboolean *isCopy)) \ | |
| 2267 JNIWrapper("Get" XSTR(Result) "ArrayElements"); \ | |
| 2268 DTRACE_PROBE3(hotspot_jni, Get##Result##ArrayElements__entry, env, array, isCopy);\ | |
| 2269 /* allocate an chunk of memory in c land */ \ | |
| 2270 typeArrayOop a = typeArrayOop(JNIHandles::resolve_non_null(array)); \ | |
| 2271 ElementType* result; \ | |
| 2272 int len = a->length(); \ | |
| 2273 if (len == 0) { \ | |
| 2274 /* Empty array: legal but useless, can't return NULL. \ | |
| 2275 * Return a pointer to something useless. \ | |
| 2276 * Avoid asserts in typeArrayOop. */ \ | |
| 2277 result = (ElementType*)get_bad_address(); \ | |
| 2278 } else { \ | |
| 2279 result = NEW_C_HEAP_ARRAY(ElementType, len); \ | |
| 2280 /* copy the array to the c chunk */ \ | |
| 2281 memcpy(result, a->Tag##_at_addr(0), sizeof(ElementType)*len); \ | |
| 2282 } \ | |
| 2283 if (isCopy) *isCopy = JNI_TRUE; \ | |
| 2284 DTRACE_PROBE1(hotspot_jni, Get##Result##ArrayElements__return, result);\ | |
| 2285 return result; \ | |
| 2286 JNI_END | |
| 2287 | |
| 2288 DEFINE_GETSCALARARRAYELEMENTS(T_BOOLEAN, jboolean, Boolean, bool) | |
| 2289 DEFINE_GETSCALARARRAYELEMENTS(T_BYTE, jbyte, Byte, byte) | |
| 2290 DEFINE_GETSCALARARRAYELEMENTS(T_SHORT, jshort, Short, short) | |
| 2291 DEFINE_GETSCALARARRAYELEMENTS(T_CHAR, jchar, Char, char) | |
| 2292 DEFINE_GETSCALARARRAYELEMENTS(T_INT, jint, Int, int) | |
| 2293 DEFINE_GETSCALARARRAYELEMENTS(T_LONG, jlong, Long, long) | |
| 2294 DEFINE_GETSCALARARRAYELEMENTS(T_FLOAT, jfloat, Float, float) | |
| 2295 DEFINE_GETSCALARARRAYELEMENTS(T_DOUBLE, jdouble, Double, double) | |
| 2296 | |
| 2297 | |
| 2298 #define DEFINE_RELEASESCALARARRAYELEMENTS(ElementTag,ElementType,Result,Tag) \ | |
| 2299 \ | |
| 2300 JNI_QUICK_ENTRY(void, \ | |
| 2301 jni_Release##Result##ArrayElements(JNIEnv *env, ElementType##Array array, \ | |
| 2302 ElementType *buf, jint mode)) \ | |
| 2303 JNIWrapper("Release" XSTR(Result) "ArrayElements"); \ | |
| 2304 DTRACE_PROBE4(hotspot_jni, Release##Result##ArrayElements__entry, env, array, buf, mode);\ | |
| 2305 typeArrayOop a = typeArrayOop(JNIHandles::resolve_non_null(array)); \ | |
| 2306 int len = a->length(); \ | |
| 2307 if (len != 0) { /* Empty array: nothing to free or copy. */ \ | |
| 2308 if ((mode == 0) || (mode == JNI_COMMIT)) { \ | |
| 2309 memcpy(a->Tag##_at_addr(0), buf, sizeof(ElementType)*len); \ | |
| 2310 } \ | |
| 2311 if ((mode == 0) || (mode == JNI_ABORT)) { \ | |
| 2312 FreeHeap(buf); \ | |
| 2313 } \ | |
| 2314 } \ | |
| 2315 DTRACE_PROBE(hotspot_jni, Release##Result##ArrayElements__return);\ | |
| 2316 JNI_END | |
| 2317 | |
| 2318 DEFINE_RELEASESCALARARRAYELEMENTS(T_BOOLEAN, jboolean, Boolean, bool) | |
| 2319 DEFINE_RELEASESCALARARRAYELEMENTS(T_BYTE, jbyte, Byte, byte) | |
| 2320 DEFINE_RELEASESCALARARRAYELEMENTS(T_SHORT, jshort, Short, short) | |
| 2321 DEFINE_RELEASESCALARARRAYELEMENTS(T_CHAR, jchar, Char, char) | |
| 2322 DEFINE_RELEASESCALARARRAYELEMENTS(T_INT, jint, Int, int) | |
| 2323 DEFINE_RELEASESCALARARRAYELEMENTS(T_LONG, jlong, Long, long) | |
| 2324 DEFINE_RELEASESCALARARRAYELEMENTS(T_FLOAT, jfloat, Float, float) | |
| 2325 DEFINE_RELEASESCALARARRAYELEMENTS(T_DOUBLE, jdouble, Double, double) | |
| 2326 | |
| 2327 #define DEFINE_GETSCALARARRAYREGION(ElementTag,ElementType,Result, Tag) \ | |
| 2328 DT_VOID_RETURN_MARK_DECL(Get##Result##ArrayRegion);\ | |
| 2329 \ | |
| 2330 JNI_ENTRY(void, \ | |
| 2331 jni_Get##Result##ArrayRegion(JNIEnv *env, ElementType##Array array, jsize start, \ | |
| 2332 jsize len, ElementType *buf)) \ | |
| 2333 JNIWrapper("Get" XSTR(Result) "ArrayRegion"); \ | |
| 2334 DTRACE_PROBE5(hotspot_jni, Get##Result##ArrayRegion__entry, env, array, start, len, buf);\ | |
| 2335 DT_VOID_RETURN_MARK(Get##Result##ArrayRegion); \ | |
| 2336 typeArrayOop src = typeArrayOop(JNIHandles::resolve_non_null(array)); \ | |
| 2337 if (start < 0 || len < 0 || ((unsigned int)start + (unsigned int)len > (unsigned int)src->length())) { \ | |
| 2338 THROW(vmSymbols::java_lang_ArrayIndexOutOfBoundsException()); \ | |
| 2339 } else { \ | |
| 2340 if (len > 0) { \ | |
| 2341 int sc = typeArrayKlass::cast(src->klass())->log2_element_size(); \ | |
| 2342 memcpy((u_char*) buf, \ | |
| 2343 (u_char*) src->Tag##_at_addr(start), \ | |
| 2344 len << sc); \ | |
| 2345 } \ | |
| 2346 } \ | |
| 2347 JNI_END | |
| 2348 | |
| 2349 DEFINE_GETSCALARARRAYREGION(T_BOOLEAN, jboolean,Boolean, bool) | |
| 2350 DEFINE_GETSCALARARRAYREGION(T_BYTE, jbyte, Byte, byte) | |
| 2351 DEFINE_GETSCALARARRAYREGION(T_SHORT, jshort, Short, short) | |
| 2352 DEFINE_GETSCALARARRAYREGION(T_CHAR, jchar, Char, char) | |
| 2353 DEFINE_GETSCALARARRAYREGION(T_INT, jint, Int, int) | |
| 2354 DEFINE_GETSCALARARRAYREGION(T_LONG, jlong, Long, long) | |
| 2355 DEFINE_GETSCALARARRAYREGION(T_FLOAT, jfloat, Float, float) | |
| 2356 DEFINE_GETSCALARARRAYREGION(T_DOUBLE, jdouble, Double, double) | |
| 2357 | |
| 2358 #define DEFINE_SETSCALARARRAYREGION(ElementTag,ElementType,Result, Tag) \ | |
| 2359 DT_VOID_RETURN_MARK_DECL(Set##Result##ArrayRegion);\ | |
| 2360 \ | |
| 2361 JNI_ENTRY(void, \ | |
| 2362 jni_Set##Result##ArrayRegion(JNIEnv *env, ElementType##Array array, jsize start, \ | |
| 2363 jsize len, const ElementType *buf)) \ | |
| 2364 JNIWrapper("Set" XSTR(Result) "ArrayRegion"); \ | |
| 2365 DTRACE_PROBE5(hotspot_jni, Set##Result##ArrayRegion__entry, env, array, start, len, buf);\ | |
| 2366 DT_VOID_RETURN_MARK(Set##Result##ArrayRegion); \ | |
| 2367 typeArrayOop dst = typeArrayOop(JNIHandles::resolve_non_null(array)); \ | |
| 2368 if (start < 0 || len < 0 || ((unsigned int)start + (unsigned int)len > (unsigned int)dst->length())) { \ | |
| 2369 THROW(vmSymbols::java_lang_ArrayIndexOutOfBoundsException()); \ | |
| 2370 } else { \ | |
| 2371 if (len > 0) { \ | |
| 2372 int sc = typeArrayKlass::cast(dst->klass())->log2_element_size(); \ | |
| 2373 memcpy((u_char*) dst->Tag##_at_addr(start), \ | |
| 2374 (u_char*) buf, \ | |
| 2375 len << sc); \ | |
| 2376 } \ | |
| 2377 } \ | |
| 2378 JNI_END | |
| 2379 | |
| 2380 DEFINE_SETSCALARARRAYREGION(T_BOOLEAN, jboolean, Boolean, bool) | |
| 2381 DEFINE_SETSCALARARRAYREGION(T_BYTE, jbyte, Byte, byte) | |
| 2382 DEFINE_SETSCALARARRAYREGION(T_SHORT, jshort, Short, short) | |
| 2383 DEFINE_SETSCALARARRAYREGION(T_CHAR, jchar, Char, char) | |
| 2384 DEFINE_SETSCALARARRAYREGION(T_INT, jint, Int, int) | |
| 2385 DEFINE_SETSCALARARRAYREGION(T_LONG, jlong, Long, long) | |
| 2386 DEFINE_SETSCALARARRAYREGION(T_FLOAT, jfloat, Float, float) | |
| 2387 DEFINE_SETSCALARARRAYREGION(T_DOUBLE, jdouble, Double, double) | |
| 2388 | |
| 2389 | |
| 2390 // | |
| 2391 // Interception of natives | |
| 2392 // | |
| 2393 | |
| 2394 // The RegisterNatives call being attempted tried to register with a method that | |
| 2395 // is not native. Ask JVM TI what prefixes have been specified. Then check | |
| 2396 // to see if the native method is now wrapped with the prefixes. See the | |
| 2397 // SetNativeMethodPrefix(es) functions in the JVM TI Spec for details. | |
| 2398 static methodOop find_prefixed_native(KlassHandle k, | |
|
2177
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|
2399 Symbol* name, Symbol* signature, TRAPS) { |
| 0 | 2400 ResourceMark rm(THREAD); |
| 2401 methodOop method; | |
| 2402 int name_len = name->utf8_length(); | |
| 2403 char* name_str = name->as_utf8(); | |
| 2404 int prefix_count; | |
| 2405 char** prefixes = JvmtiExport::get_all_native_method_prefixes(&prefix_count); | |
| 2406 for (int i = 0; i < prefix_count; i++) { | |
| 2407 char* prefix = prefixes[i]; | |
| 2408 int prefix_len = (int)strlen(prefix); | |
| 2409 | |
| 2410 // try adding this prefix to the method name and see if it matches another method name | |
| 2411 int trial_len = name_len + prefix_len; | |
| 2412 char* trial_name_str = NEW_RESOURCE_ARRAY(char, trial_len + 1); | |
| 2413 strcpy(trial_name_str, prefix); | |
| 2414 strcat(trial_name_str, name_str); | |
|
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|
2415 TempNewSymbol trial_name = SymbolTable::probe(trial_name_str, trial_len); |
|
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diff
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|
2416 if (trial_name == NULL) { |
| 0 | 2417 continue; // no such symbol, so this prefix wasn't used, try the next prefix |
| 2418 } | |
|
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diff
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|
2419 method = Klass::cast(k())->lookup_method(trial_name, signature); |
| 0 | 2420 if (method == NULL) { |
| 2421 continue; // signature doesn't match, try the next prefix | |
| 2422 } | |
| 2423 if (method->is_native()) { | |
| 2424 method->set_is_prefixed_native(); | |
| 2425 return method; // wahoo, we found a prefixed version of the method, return it | |
| 2426 } | |
| 2427 // found as non-native, so prefix is good, add it, probably just need more prefixes | |
| 2428 name_len = trial_len; | |
| 2429 name_str = trial_name_str; | |
| 2430 } | |
| 2431 return NULL; // not found | |
| 2432 } | |
| 2433 | |
|
2177
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diff
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|
2434 static bool register_native(KlassHandle k, Symbol* name, Symbol* signature, address entry, TRAPS) { |
|
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diff
changeset
|
2435 methodOop method = Klass::cast(k())->lookup_method(name, signature); |
| 0 | 2436 if (method == NULL) { |
| 2437 ResourceMark rm; | |
| 2438 stringStream st; | |
| 2439 st.print("Method %s name or signature does not match", | |
|
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diff
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|
2440 methodOopDesc::name_and_sig_as_C_string(Klass::cast(k()), name, signature)); |
| 0 | 2441 THROW_MSG_(vmSymbols::java_lang_NoSuchMethodError(), st.as_string(), false); |
| 2442 } | |
| 2443 if (!method->is_native()) { | |
| 2444 // trying to register to a non-native method, see if a JVM TI agent has added prefix(es) | |
| 2445 method = find_prefixed_native(k, name, signature, THREAD); | |
| 2446 if (method == NULL) { | |
| 2447 ResourceMark rm; | |
| 2448 stringStream st; | |
| 2449 st.print("Method %s is not declared as native", | |
|
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diff
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|
2450 methodOopDesc::name_and_sig_as_C_string(Klass::cast(k()), name, signature)); |
| 0 | 2451 THROW_MSG_(vmSymbols::java_lang_NoSuchMethodError(), st.as_string(), false); |
| 2452 } | |
| 2453 } | |
| 2454 | |
| 2455 if (entry != NULL) { | |
| 2456 method->set_native_function(entry, | |
| 2457 methodOopDesc::native_bind_event_is_interesting); | |
| 2458 } else { | |
| 2459 method->clear_native_function(); | |
| 2460 } | |
| 2461 if (PrintJNIResolving) { | |
| 2462 ResourceMark rm(THREAD); | |
| 2463 tty->print_cr("[Registering JNI native method %s.%s]", | |
| 2464 Klass::cast(method->method_holder())->external_name(), | |
| 2465 method->name()->as_C_string()); | |
| 2466 } | |
| 2467 return true; | |
| 2468 } | |
| 2469 | |
| 2470 DT_RETURN_MARK_DECL(RegisterNatives, jint); | |
| 2471 | |
| 2472 JNI_ENTRY(jint, jni_RegisterNatives(JNIEnv *env, jclass clazz, | |
| 2473 const JNINativeMethod *methods, | |
| 2474 jint nMethods)) | |
| 2475 JNIWrapper("RegisterNatives"); | |
| 2476 DTRACE_PROBE4(hotspot_jni, RegisterNatives__entry, env, clazz, methods, nMethods); | |
| 2477 jint ret = 0; | |
| 2478 DT_RETURN_MARK(RegisterNatives, jint, (const jint&)ret); | |
| 2479 | |
| 2480 KlassHandle h_k(thread, java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(clazz))); | |
| 2481 | |
| 2482 for (int index = 0; index < nMethods; index++) { | |
| 2483 const char* meth_name = methods[index].name; | |
| 2484 const char* meth_sig = methods[index].signature; | |
| 2485 int meth_name_len = (int)strlen(meth_name); | |
| 2486 | |
| 2487 // The class should have been loaded (we have an instance of the class | |
| 2488 // passed in) so the method and signature should already be in the symbol | |
| 2489 // table. If they're not there, the method doesn't exist. | |
|
2177
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diff
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|
2490 TempNewSymbol name = SymbolTable::probe(meth_name, meth_name_len); |
|
3582bf76420e
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parents:
1989
diff
changeset
|
2491 TempNewSymbol signature = SymbolTable::probe(meth_sig, (int)strlen(meth_sig)); |
|
3582bf76420e
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diff
changeset
|
2492 |
|
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diff
changeset
|
2493 if (name == NULL || signature == NULL) { |
| 0 | 2494 ResourceMark rm; |
| 2495 stringStream st; | |
| 2496 st.print("Method %s.%s%s not found", Klass::cast(h_k())->external_name(), meth_name, meth_sig); | |
| 2497 // Must return negative value on failure | |
| 2498 THROW_MSG_(vmSymbols::java_lang_NoSuchMethodError(), st.as_string(), -1); | |
| 2499 } | |
| 2500 | |
| 2501 bool res = register_native(h_k, name, signature, | |
| 2502 (address) methods[index].fnPtr, THREAD); | |
| 2503 if (!res) { | |
| 2504 ret = -1; | |
| 2505 break; | |
| 2506 } | |
| 2507 } | |
| 2508 return ret; | |
| 2509 JNI_END | |
| 2510 | |
| 2511 | |
| 2512 JNI_ENTRY(jint, jni_UnregisterNatives(JNIEnv *env, jclass clazz)) | |
| 2513 JNIWrapper("UnregisterNatives"); | |
| 2514 DTRACE_PROBE2(hotspot_jni, UnregisterNatives__entry, env, clazz); | |
| 2515 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(clazz)); | |
| 2516 //%note jni_2 | |
| 2517 if (Klass::cast(k)->oop_is_instance()) { | |
| 2518 for (int index = 0; index < instanceKlass::cast(k)->methods()->length(); index++) { | |
| 2519 methodOop m = methodOop(instanceKlass::cast(k)->methods()->obj_at(index)); | |
| 2520 if (m->is_native()) { | |
| 2521 m->clear_native_function(); | |
| 2522 m->set_signature_handler(NULL); | |
| 2523 } | |
| 2524 } | |
| 2525 } | |
| 2526 DTRACE_PROBE1(hotspot_jni, UnregisterNatives__return, 0); | |
| 2527 return 0; | |
| 2528 JNI_END | |
| 2529 | |
| 2530 // | |
| 2531 // Monitor functions | |
| 2532 // | |
| 2533 | |
| 2534 DT_RETURN_MARK_DECL(MonitorEnter, jint); | |
| 2535 | |
| 2536 JNI_ENTRY(jint, jni_MonitorEnter(JNIEnv *env, jobject jobj)) | |
| 2537 DTRACE_PROBE2(hotspot_jni, MonitorEnter__entry, env, jobj); | |
| 2538 jint ret = JNI_ERR; | |
| 2539 DT_RETURN_MARK(MonitorEnter, jint, (const jint&)ret); | |
| 2540 | |
| 2541 // If the object is null, we can't do anything with it | |
| 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_enter(obj, CHECK_(JNI_ERR)); | |
| 2548 ret = JNI_OK; | |
| 2549 return ret; | |
| 2550 JNI_END | |
| 2551 | |
| 2552 DT_RETURN_MARK_DECL(MonitorExit, jint); | |
| 2553 | |
| 2554 JNI_ENTRY(jint, jni_MonitorExit(JNIEnv *env, jobject jobj)) | |
| 2555 DTRACE_PROBE2(hotspot_jni, MonitorExit__entry, env, jobj); | |
| 2556 jint ret = JNI_ERR; | |
| 2557 DT_RETURN_MARK(MonitorExit, jint, (const jint&)ret); | |
| 2558 | |
| 2559 // Don't do anything with a null object | |
| 2560 if (jobj == NULL) { | |
| 2561 THROW_(vmSymbols::java_lang_NullPointerException(), JNI_ERR); | |
| 2562 } | |
| 2563 | |
| 2564 Handle obj(THREAD, JNIHandles::resolve_non_null(jobj)); | |
| 2565 ObjectSynchronizer::jni_exit(obj(), CHECK_(JNI_ERR)); | |
| 2566 | |
| 2567 ret = JNI_OK; | |
| 2568 return ret; | |
| 2569 JNI_END | |
| 2570 | |
| 2571 // | |
| 2572 // Extensions | |
| 2573 // | |
| 2574 | |
| 2575 DT_VOID_RETURN_MARK_DECL(GetStringRegion); | |
| 2576 | |
| 2577 JNI_ENTRY(void, jni_GetStringRegion(JNIEnv *env, jstring string, jsize start, jsize len, jchar *buf)) | |
| 2578 JNIWrapper("GetStringRegion"); | |
| 2579 DTRACE_PROBE5(hotspot_jni, GetStringRegion__entry, env, string, start, len, buf); | |
| 2580 DT_VOID_RETURN_MARK(GetStringRegion); | |
| 2581 oop s = JNIHandles::resolve_non_null(string); | |
| 2582 int s_len = java_lang_String::length(s); | |
| 2583 if (start < 0 || len < 0 || start + len > s_len) { | |
| 2584 THROW(vmSymbols::java_lang_StringIndexOutOfBoundsException()); | |
| 2585 } else { | |
| 2586 if (len > 0) { | |
| 2587 int s_offset = java_lang_String::offset(s); | |
| 2588 typeArrayOop s_value = java_lang_String::value(s); | |
| 2589 memcpy(buf, s_value->char_at_addr(s_offset+start), sizeof(jchar)*len); | |
| 2590 } | |
| 2591 } | |
| 2592 JNI_END | |
| 2593 | |
| 2594 DT_VOID_RETURN_MARK_DECL(GetStringUTFRegion); | |
| 2595 | |
| 2596 JNI_ENTRY(void, jni_GetStringUTFRegion(JNIEnv *env, jstring string, jsize start, jsize len, char *buf)) | |
| 2597 JNIWrapper("GetStringUTFRegion"); | |
| 2598 DTRACE_PROBE5(hotspot_jni, GetStringUTFRegion__entry, env, string, start, len, buf); | |
| 2599 DT_VOID_RETURN_MARK(GetStringUTFRegion); | |
| 2600 oop s = JNIHandles::resolve_non_null(string); | |
| 2601 int s_len = java_lang_String::length(s); | |
| 2602 if (start < 0 || len < 0 || start + len > s_len) { | |
| 2603 THROW(vmSymbols::java_lang_StringIndexOutOfBoundsException()); | |
| 2604 } else { | |
| 2605 //%note jni_7 | |
| 2606 if (len > 0) { | |
| 2607 ResourceMark rm(THREAD); | |
| 2608 char *utf_region = java_lang_String::as_utf8_string(s, start, len); | |
| 2609 int utf_len = (int)strlen(utf_region); | |
| 2610 memcpy(buf, utf_region, utf_len); | |
| 2611 buf[utf_len] = 0; | |
| 2612 } else { | |
| 2613 // JDK null-terminates the buffer even in len is zero | |
| 2614 if (buf != NULL) { | |
| 2615 buf[0] = 0; | |
| 2616 } | |
| 2617 } | |
| 2618 } | |
| 2619 JNI_END | |
| 2620 | |
| 2621 | |
| 2622 JNI_ENTRY(void*, jni_GetPrimitiveArrayCritical(JNIEnv *env, jarray array, jboolean *isCopy)) | |
| 2623 JNIWrapper("GetPrimitiveArrayCritical"); | |
| 2624 DTRACE_PROBE3(hotspot_jni, GetPrimitiveArrayCritical__entry, env, array, isCopy); | |
| 2625 GC_locker::lock_critical(thread); | |
| 2626 if (isCopy != NULL) { | |
| 2627 *isCopy = JNI_FALSE; | |
| 2628 } | |
| 2629 oop a = JNIHandles::resolve_non_null(array); | |
| 2630 assert(a->is_array(), "just checking"); | |
| 2631 BasicType type; | |
| 2632 if (a->is_objArray()) { | |
| 2633 type = T_OBJECT; | |
| 2634 } else { | |
| 2635 type = typeArrayKlass::cast(a->klass())->element_type(); | |
| 2636 } | |
| 2637 void* ret = arrayOop(a)->base(type); | |
| 2638 DTRACE_PROBE1(hotspot_jni, GetPrimitiveArrayCritical__return, ret); | |
| 2639 return ret; | |
| 2640 JNI_END | |
| 2641 | |
| 2642 | |
| 2643 JNI_ENTRY(void, jni_ReleasePrimitiveArrayCritical(JNIEnv *env, jarray array, void *carray, jint mode)) | |
| 2644 JNIWrapper("ReleasePrimitiveArrayCritical"); | |
| 2645 DTRACE_PROBE4(hotspot_jni, ReleasePrimitiveArrayCritical__entry, env, array, carray, mode); | |
| 2646 // The array, carray and mode arguments are ignored | |
| 2647 GC_locker::unlock_critical(thread); | |
| 2648 DTRACE_PROBE(hotspot_jni, ReleasePrimitiveArrayCritical__return); | |
| 2649 JNI_END | |
| 2650 | |
| 2651 | |
| 2652 JNI_ENTRY(const jchar*, jni_GetStringCritical(JNIEnv *env, jstring string, jboolean *isCopy)) | |
| 2653 JNIWrapper("GetStringCritical"); | |
| 2654 DTRACE_PROBE3(hotspot_jni, GetStringCritical__entry, env, string, isCopy); | |
| 2655 GC_locker::lock_critical(thread); | |
| 2656 if (isCopy != NULL) { | |
| 2657 *isCopy = JNI_FALSE; | |
| 2658 } | |
| 2659 oop s = JNIHandles::resolve_non_null(string); | |
| 2660 int s_len = java_lang_String::length(s); | |
| 2661 typeArrayOop s_value = java_lang_String::value(s); | |
| 2662 int s_offset = java_lang_String::offset(s); | |
| 2663 const jchar* ret; | |
| 2664 if (s_len > 0) { | |
| 2665 ret = s_value->char_at_addr(s_offset); | |
| 2666 } else { | |
| 2667 ret = (jchar*) s_value->base(T_CHAR); | |
| 2668 } | |
| 2669 DTRACE_PROBE1(hotspot_jni, GetStringCritical__return, ret); | |
| 2670 return ret; | |
| 2671 JNI_END | |
| 2672 | |
| 2673 | |
| 2674 JNI_ENTRY(void, jni_ReleaseStringCritical(JNIEnv *env, jstring str, const jchar *chars)) | |
| 2675 JNIWrapper("ReleaseStringCritical"); | |
| 2676 DTRACE_PROBE3(hotspot_jni, ReleaseStringCritical__entry, env, str, chars); | |
| 2677 // The str and chars arguments are ignored | |
| 2678 GC_locker::unlock_critical(thread); | |
| 2679 DTRACE_PROBE(hotspot_jni, ReleaseStringCritical__return); | |
| 2680 JNI_END | |
| 2681 | |
| 2682 | |
| 2683 JNI_ENTRY(jweak, jni_NewWeakGlobalRef(JNIEnv *env, jobject ref)) | |
| 2684 JNIWrapper("jni_NewWeakGlobalRef"); | |
| 2685 DTRACE_PROBE2(hotspot_jni, NewWeakGlobalRef__entry, env, ref); | |
| 2686 Handle ref_handle(thread, JNIHandles::resolve(ref)); | |
| 2687 jweak ret = JNIHandles::make_weak_global(ref_handle); | |
| 2688 DTRACE_PROBE1(hotspot_jni, NewWeakGlobalRef__return, ret); | |
| 2689 return ret; | |
| 2690 JNI_END | |
| 2691 | |
| 2692 // Must be JNI_ENTRY (with HandleMark) | |
| 2693 JNI_ENTRY(void, jni_DeleteWeakGlobalRef(JNIEnv *env, jweak ref)) | |
| 2694 JNIWrapper("jni_DeleteWeakGlobalRef"); | |
| 2695 DTRACE_PROBE2(hotspot_jni, DeleteWeakGlobalRef__entry, env, ref); | |
| 2696 JNIHandles::destroy_weak_global(ref); | |
| 2697 DTRACE_PROBE(hotspot_jni, DeleteWeakGlobalRef__return); | |
| 2698 JNI_END | |
| 2699 | |
| 2700 | |
| 2701 JNI_QUICK_ENTRY(jboolean, jni_ExceptionCheck(JNIEnv *env)) | |
| 2702 JNIWrapper("jni_ExceptionCheck"); | |
| 2703 DTRACE_PROBE1(hotspot_jni, ExceptionCheck__entry, env); | |
| 2704 jni_check_async_exceptions(thread); | |
| 2705 jboolean ret = (thread->has_pending_exception()) ? JNI_TRUE : JNI_FALSE; | |
| 2706 DTRACE_PROBE1(hotspot_jni, ExceptionCheck__return, ret); | |
| 2707 return ret; | |
| 2708 JNI_END | |
| 2709 | |
| 2710 | |
| 2711 // Initialization state for three routines below relating to | |
| 2712 // java.nio.DirectBuffers | |
| 2713 static jint directBufferSupportInitializeStarted = 0; | |
| 2714 static volatile jint directBufferSupportInitializeEnded = 0; | |
| 2715 static volatile jint directBufferSupportInitializeFailed = 0; | |
| 2716 static jclass bufferClass = NULL; | |
| 2717 static jclass directBufferClass = NULL; | |
| 2718 static jclass directByteBufferClass = NULL; | |
| 2719 static jmethodID directByteBufferConstructor = NULL; | |
| 2720 static jfieldID directBufferAddressField = NULL; | |
| 2721 static jfieldID bufferCapacityField = NULL; | |
| 2722 | |
| 2723 static jclass lookupOne(JNIEnv* env, const char* name, TRAPS) { | |
| 2724 Handle loader; // null (bootstrap) loader | |
| 2725 Handle protection_domain; // null protection domain | |
| 2726 | |
|
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|
2727 TempNewSymbol sym = SymbolTable::new_symbol(name, CHECK_NULL); |
|
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|
2728 jclass result = find_class_from_class_loader(env, sym, true, loader, protection_domain, true, CHECK_NULL); |
|
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|
2729 |
|
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|
2730 if (TraceClassResolution && result != NULL) { |
|
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|
2731 trace_class_resolution(java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(result))); |
|
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|
2732 } |
|
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|
2733 return result; |
| 0 | 2734 } |
| 2735 | |
| 2736 // These lookups are done with the NULL (bootstrap) ClassLoader to | |
| 2737 // circumvent any security checks that would be done by jni_FindClass. | |
| 2738 JNI_ENTRY(bool, lookupDirectBufferClasses(JNIEnv* env)) | |
| 2739 { | |
| 2740 if ((bufferClass = lookupOne(env, "java/nio/Buffer", thread)) == NULL) { return false; } | |
| 2741 if ((directBufferClass = lookupOne(env, "sun/nio/ch/DirectBuffer", thread)) == NULL) { return false; } | |
| 2742 if ((directByteBufferClass = lookupOne(env, "java/nio/DirectByteBuffer", thread)) == NULL) { return false; } | |
| 2743 return true; | |
| 2744 } | |
| 2745 JNI_END | |
| 2746 | |
| 2747 | |
| 2748 static bool initializeDirectBufferSupport(JNIEnv* env, JavaThread* thread) { | |
| 2749 if (directBufferSupportInitializeFailed) { | |
| 2750 return false; | |
| 2751 } | |
| 2752 | |
| 2753 if (Atomic::cmpxchg(1, &directBufferSupportInitializeStarted, 0) == 0) { | |
| 2754 if (!lookupDirectBufferClasses(env)) { | |
| 2755 directBufferSupportInitializeFailed = 1; | |
| 2756 return false; | |
| 2757 } | |
| 2758 | |
| 2759 // Make global references for these | |
| 2760 bufferClass = (jclass) env->NewGlobalRef(bufferClass); | |
| 2761 directBufferClass = (jclass) env->NewGlobalRef(directBufferClass); | |
| 2762 directByteBufferClass = (jclass) env->NewGlobalRef(directByteBufferClass); | |
| 2763 | |
| 2764 // Get needed field and method IDs | |
| 2765 directByteBufferConstructor = env->GetMethodID(directByteBufferClass, "<init>", "(JI)V"); | |
| 2766 directBufferAddressField = env->GetFieldID(bufferClass, "address", "J"); | |
| 2767 bufferCapacityField = env->GetFieldID(bufferClass, "capacity", "I"); | |
| 2768 | |
| 2769 if ((directByteBufferConstructor == NULL) || | |
| 2770 (directBufferAddressField == NULL) || | |
| 2771 (bufferCapacityField == NULL)) { | |
| 2772 directBufferSupportInitializeFailed = 1; | |
| 2773 return false; | |
| 2774 } | |
| 2775 | |
| 2776 directBufferSupportInitializeEnded = 1; | |
| 2777 } else { | |
| 2778 while (!directBufferSupportInitializeEnded && !directBufferSupportInitializeFailed) { | |
|
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2779 // Set state as yield_all can call os:sleep. On Solaris, yield_all calls |
|
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2780 // os::sleep which requires the VM state transition. On other platforms, it |
|
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2781 // is not necessary. The following call to change the VM state is purposely |
|
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|
2782 // put inside the loop to avoid potential deadlock when multiple threads |
|
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|
2783 // try to call this method. See 6791815 for more details. |
|
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|
2784 ThreadInVMfromNative tivn(thread); |
| 0 | 2785 os::yield_all(); |
| 2786 } | |
| 2787 } | |
| 2788 | |
| 2789 return !directBufferSupportInitializeFailed; | |
| 2790 } | |
| 2791 | |
| 2792 extern "C" jobject JNICALL jni_NewDirectByteBuffer(JNIEnv *env, void* address, jlong capacity) | |
| 2793 { | |
| 2794 // thread_from_jni_environment() will block if VM is gone. | |
| 2795 JavaThread* thread = JavaThread::thread_from_jni_environment(env); | |
| 2796 | |
| 2797 JNIWrapper("jni_NewDirectByteBuffer"); | |
| 2798 DTRACE_PROBE3(hotspot_jni, NewDirectByteBuffer__entry, env, address, capacity); | |
| 2799 | |
| 2800 if (!directBufferSupportInitializeEnded) { | |
| 2801 if (!initializeDirectBufferSupport(env, thread)) { | |
| 2802 DTRACE_PROBE1(hotspot_jni, NewDirectByteBuffer__return, NULL); | |
| 2803 return NULL; | |
| 2804 } | |
| 2805 } | |
| 2806 | |
| 2807 // Being paranoid about accidental sign extension on address | |
| 2808 jlong addr = (jlong) ((uintptr_t) address); | |
| 2809 // NOTE that package-private DirectByteBuffer constructor currently | |
| 2810 // takes int capacity | |
| 2811 jint cap = (jint) capacity; | |
| 2812 jobject ret = env->NewObject(directByteBufferClass, directByteBufferConstructor, addr, cap); | |
| 2813 DTRACE_PROBE1(hotspot_jni, NewDirectByteBuffer__return, ret); | |
| 2814 return ret; | |
| 2815 } | |
| 2816 | |
| 2817 DT_RETURN_MARK_DECL(GetDirectBufferAddress, void*); | |
| 2818 | |
| 2819 extern "C" void* JNICALL jni_GetDirectBufferAddress(JNIEnv *env, jobject buf) | |
| 2820 { | |
| 2821 // thread_from_jni_environment() will block if VM is gone. | |
| 2822 JavaThread* thread = JavaThread::thread_from_jni_environment(env); | |
| 2823 | |
| 2824 JNIWrapper("jni_GetDirectBufferAddress"); | |
| 2825 DTRACE_PROBE2(hotspot_jni, GetDirectBufferAddress__entry, env, buf); | |
| 2826 void* ret = NULL; | |
| 2827 DT_RETURN_MARK(GetDirectBufferAddress, void*, (const void*&)ret); | |
| 2828 | |
| 2829 if (!directBufferSupportInitializeEnded) { | |
| 2830 if (!initializeDirectBufferSupport(env, thread)) { | |
| 2831 return 0; | |
| 2832 } | |
| 2833 } | |
| 2834 | |
| 2835 if ((buf != NULL) && (!env->IsInstanceOf(buf, directBufferClass))) { | |
| 2836 return 0; | |
| 2837 } | |
| 2838 | |
| 2839 ret = (void*)(intptr_t)env->GetLongField(buf, directBufferAddressField); | |
| 2840 return ret; | |
| 2841 } | |
| 2842 | |
| 2843 DT_RETURN_MARK_DECL(GetDirectBufferCapacity, jlong); | |
| 2844 | |
| 2845 extern "C" jlong JNICALL jni_GetDirectBufferCapacity(JNIEnv *env, jobject buf) | |
| 2846 { | |
| 2847 // thread_from_jni_environment() will block if VM is gone. | |
| 2848 JavaThread* thread = JavaThread::thread_from_jni_environment(env); | |
| 2849 | |
| 2850 JNIWrapper("jni_GetDirectBufferCapacity"); | |
| 2851 DTRACE_PROBE2(hotspot_jni, GetDirectBufferCapacity__entry, env, buf); | |
| 2852 jlong ret = -1; | |
| 2853 DT_RETURN_MARK(GetDirectBufferCapacity, jlong, (const jlong&)ret); | |
| 2854 | |
| 2855 if (!directBufferSupportInitializeEnded) { | |
| 2856 if (!initializeDirectBufferSupport(env, thread)) { | |
| 2857 ret = 0; | |
| 2858 return ret; | |
| 2859 } | |
| 2860 } | |
| 2861 | |
| 2862 if (buf == NULL) { | |
| 2863 return -1; | |
| 2864 } | |
| 2865 | |
| 2866 if (!env->IsInstanceOf(buf, directBufferClass)) { | |
| 2867 return -1; | |
| 2868 } | |
| 2869 | |
| 2870 // NOTE that capacity is currently an int in the implementation | |
| 2871 ret = env->GetIntField(buf, bufferCapacityField); | |
| 2872 return ret; | |
| 2873 } | |
| 2874 | |
| 2875 | |
| 2876 JNI_LEAF(jint, jni_GetVersion(JNIEnv *env)) | |
| 2877 JNIWrapper("GetVersion"); | |
| 2878 DTRACE_PROBE1(hotspot_jni, GetVersion__entry, env); | |
| 2879 DTRACE_PROBE1(hotspot_jni, GetVersion__return, CurrentVersion); | |
| 2880 return CurrentVersion; | |
| 2881 JNI_END | |
| 2882 | |
| 2883 extern struct JavaVM_ main_vm; | |
| 2884 | |
| 2885 JNI_LEAF(jint, jni_GetJavaVM(JNIEnv *env, JavaVM **vm)) | |
| 2886 JNIWrapper("jni_GetJavaVM"); | |
| 2887 DTRACE_PROBE2(hotspot_jni, GetJavaVM__entry, env, vm); | |
| 2888 *vm = (JavaVM *)(&main_vm); | |
| 2889 DTRACE_PROBE1(hotspot_jni, GetJavaVM__return, JNI_OK); | |
| 2890 return JNI_OK; | |
| 2891 JNI_END | |
| 2892 | |
| 2893 // Structure containing all jni functions | |
| 2894 struct JNINativeInterface_ jni_NativeInterface = { | |
| 2895 NULL, | |
| 2896 NULL, | |
| 2897 NULL, | |
| 2898 | |
| 2899 NULL, | |
| 2900 | |
| 2901 jni_GetVersion, | |
| 2902 | |
| 2903 jni_DefineClass, | |
| 2904 jni_FindClass, | |
| 2905 | |
| 2906 jni_FromReflectedMethod, | |
| 2907 jni_FromReflectedField, | |
| 2908 | |
| 2909 jni_ToReflectedMethod, | |
| 2910 | |
| 2911 jni_GetSuperclass, | |
| 2912 jni_IsAssignableFrom, | |
| 2913 | |
| 2914 jni_ToReflectedField, | |
| 2915 | |
| 2916 jni_Throw, | |
| 2917 jni_ThrowNew, | |
| 2918 jni_ExceptionOccurred, | |
| 2919 jni_ExceptionDescribe, | |
| 2920 jni_ExceptionClear, | |
| 2921 jni_FatalError, | |
| 2922 | |
| 2923 jni_PushLocalFrame, | |
| 2924 jni_PopLocalFrame, | |
| 2925 | |
| 2926 jni_NewGlobalRef, | |
| 2927 jni_DeleteGlobalRef, | |
| 2928 jni_DeleteLocalRef, | |
| 2929 jni_IsSameObject, | |
| 2930 | |
| 2931 jni_NewLocalRef, | |
| 2932 jni_EnsureLocalCapacity, | |
| 2933 | |
| 2934 jni_AllocObject, | |
| 2935 jni_NewObject, | |
| 2936 jni_NewObjectV, | |
| 2937 jni_NewObjectA, | |
| 2938 | |
| 2939 jni_GetObjectClass, | |
| 2940 jni_IsInstanceOf, | |
| 2941 | |
| 2942 jni_GetMethodID, | |
| 2943 | |
| 2944 jni_CallObjectMethod, | |
| 2945 jni_CallObjectMethodV, | |
| 2946 jni_CallObjectMethodA, | |
| 2947 jni_CallBooleanMethod, | |
| 2948 jni_CallBooleanMethodV, | |
| 2949 jni_CallBooleanMethodA, | |
| 2950 jni_CallByteMethod, | |
| 2951 jni_CallByteMethodV, | |
| 2952 jni_CallByteMethodA, | |
| 2953 jni_CallCharMethod, | |
| 2954 jni_CallCharMethodV, | |
| 2955 jni_CallCharMethodA, | |
| 2956 jni_CallShortMethod, | |
| 2957 jni_CallShortMethodV, | |
| 2958 jni_CallShortMethodA, | |
| 2959 jni_CallIntMethod, | |
| 2960 jni_CallIntMethodV, | |
| 2961 jni_CallIntMethodA, | |
| 2962 jni_CallLongMethod, | |
| 2963 jni_CallLongMethodV, | |
| 2964 jni_CallLongMethodA, | |
| 2965 jni_CallFloatMethod, | |
| 2966 jni_CallFloatMethodV, | |
| 2967 jni_CallFloatMethodA, | |
| 2968 jni_CallDoubleMethod, | |
| 2969 jni_CallDoubleMethodV, | |
| 2970 jni_CallDoubleMethodA, | |
| 2971 jni_CallVoidMethod, | |
| 2972 jni_CallVoidMethodV, | |
| 2973 jni_CallVoidMethodA, | |
| 2974 | |
| 2975 jni_CallNonvirtualObjectMethod, | |
| 2976 jni_CallNonvirtualObjectMethodV, | |
| 2977 jni_CallNonvirtualObjectMethodA, | |
| 2978 jni_CallNonvirtualBooleanMethod, | |
| 2979 jni_CallNonvirtualBooleanMethodV, | |
| 2980 jni_CallNonvirtualBooleanMethodA, | |
| 2981 jni_CallNonvirtualByteMethod, | |
| 2982 jni_CallNonvirtualByteMethodV, | |
| 2983 jni_CallNonvirtualByteMethodA, | |
| 2984 jni_CallNonvirtualCharMethod, | |
| 2985 jni_CallNonvirtualCharMethodV, | |
| 2986 jni_CallNonvirtualCharMethodA, | |
| 2987 jni_CallNonvirtualShortMethod, | |
| 2988 jni_CallNonvirtualShortMethodV, | |
| 2989 jni_CallNonvirtualShortMethodA, | |
| 2990 jni_CallNonvirtualIntMethod, | |
| 2991 jni_CallNonvirtualIntMethodV, | |
| 2992 jni_CallNonvirtualIntMethodA, | |
| 2993 jni_CallNonvirtualLongMethod, | |
| 2994 jni_CallNonvirtualLongMethodV, | |
| 2995 jni_CallNonvirtualLongMethodA, | |
| 2996 jni_CallNonvirtualFloatMethod, | |
| 2997 jni_CallNonvirtualFloatMethodV, | |
| 2998 jni_CallNonvirtualFloatMethodA, | |
| 2999 jni_CallNonvirtualDoubleMethod, | |
| 3000 jni_CallNonvirtualDoubleMethodV, | |
| 3001 jni_CallNonvirtualDoubleMethodA, | |
| 3002 jni_CallNonvirtualVoidMethod, | |
| 3003 jni_CallNonvirtualVoidMethodV, | |
| 3004 jni_CallNonvirtualVoidMethodA, | |
| 3005 | |
| 3006 jni_GetFieldID, | |
| 3007 | |
| 3008 jni_GetObjectField, | |
| 3009 jni_GetBooleanField, | |
| 3010 jni_GetByteField, | |
| 3011 jni_GetCharField, | |
| 3012 jni_GetShortField, | |
| 3013 jni_GetIntField, | |
| 3014 jni_GetLongField, | |
| 3015 jni_GetFloatField, | |
| 3016 jni_GetDoubleField, | |
| 3017 | |
| 3018 jni_SetObjectField, | |
| 3019 jni_SetBooleanField, | |
| 3020 jni_SetByteField, | |
| 3021 jni_SetCharField, | |
| 3022 jni_SetShortField, | |
| 3023 jni_SetIntField, | |
| 3024 jni_SetLongField, | |
| 3025 jni_SetFloatField, | |
| 3026 jni_SetDoubleField, | |
| 3027 | |
| 3028 jni_GetStaticMethodID, | |
| 3029 | |
| 3030 jni_CallStaticObjectMethod, | |
| 3031 jni_CallStaticObjectMethodV, | |
| 3032 jni_CallStaticObjectMethodA, | |
| 3033 jni_CallStaticBooleanMethod, | |
| 3034 jni_CallStaticBooleanMethodV, | |
| 3035 jni_CallStaticBooleanMethodA, | |
| 3036 jni_CallStaticByteMethod, | |
| 3037 jni_CallStaticByteMethodV, | |
| 3038 jni_CallStaticByteMethodA, | |
| 3039 jni_CallStaticCharMethod, | |
| 3040 jni_CallStaticCharMethodV, | |
| 3041 jni_CallStaticCharMethodA, | |
| 3042 jni_CallStaticShortMethod, | |
| 3043 jni_CallStaticShortMethodV, | |
| 3044 jni_CallStaticShortMethodA, | |
| 3045 jni_CallStaticIntMethod, | |
| 3046 jni_CallStaticIntMethodV, | |
| 3047 jni_CallStaticIntMethodA, | |
| 3048 jni_CallStaticLongMethod, | |
| 3049 jni_CallStaticLongMethodV, | |
| 3050 jni_CallStaticLongMethodA, | |
| 3051 jni_CallStaticFloatMethod, | |
| 3052 jni_CallStaticFloatMethodV, | |
| 3053 jni_CallStaticFloatMethodA, | |
| 3054 jni_CallStaticDoubleMethod, | |
| 3055 jni_CallStaticDoubleMethodV, | |
| 3056 jni_CallStaticDoubleMethodA, | |
| 3057 jni_CallStaticVoidMethod, | |
| 3058 jni_CallStaticVoidMethodV, | |
| 3059 jni_CallStaticVoidMethodA, | |
| 3060 | |
| 3061 jni_GetStaticFieldID, | |
| 3062 | |
| 3063 jni_GetStaticObjectField, | |
| 3064 jni_GetStaticBooleanField, | |
| 3065 jni_GetStaticByteField, | |
| 3066 jni_GetStaticCharField, | |
| 3067 jni_GetStaticShortField, | |
| 3068 jni_GetStaticIntField, | |
| 3069 jni_GetStaticLongField, | |
| 3070 jni_GetStaticFloatField, | |
| 3071 jni_GetStaticDoubleField, | |
| 3072 | |
| 3073 jni_SetStaticObjectField, | |
| 3074 jni_SetStaticBooleanField, | |
| 3075 jni_SetStaticByteField, | |
| 3076 jni_SetStaticCharField, | |
| 3077 jni_SetStaticShortField, | |
| 3078 jni_SetStaticIntField, | |
| 3079 jni_SetStaticLongField, | |
| 3080 jni_SetStaticFloatField, | |
| 3081 jni_SetStaticDoubleField, | |
| 3082 | |
| 3083 jni_NewString, | |
| 3084 jni_GetStringLength, | |
| 3085 jni_GetStringChars, | |
| 3086 jni_ReleaseStringChars, | |
| 3087 | |
| 3088 jni_NewStringUTF, | |
| 3089 jni_GetStringUTFLength, | |
| 3090 jni_GetStringUTFChars, | |
| 3091 jni_ReleaseStringUTFChars, | |
| 3092 | |
| 3093 jni_GetArrayLength, | |
| 3094 | |
| 3095 jni_NewObjectArray, | |
| 3096 jni_GetObjectArrayElement, | |
| 3097 jni_SetObjectArrayElement, | |
| 3098 | |
| 3099 jni_NewBooleanArray, | |
| 3100 jni_NewByteArray, | |
| 3101 jni_NewCharArray, | |
| 3102 jni_NewShortArray, | |
| 3103 jni_NewIntArray, | |
| 3104 jni_NewLongArray, | |
| 3105 jni_NewFloatArray, | |
| 3106 jni_NewDoubleArray, | |
| 3107 | |
| 3108 jni_GetBooleanArrayElements, | |
| 3109 jni_GetByteArrayElements, | |
| 3110 jni_GetCharArrayElements, | |
| 3111 jni_GetShortArrayElements, | |
| 3112 jni_GetIntArrayElements, | |
| 3113 jni_GetLongArrayElements, | |
| 3114 jni_GetFloatArrayElements, | |
| 3115 jni_GetDoubleArrayElements, | |
| 3116 | |
| 3117 jni_ReleaseBooleanArrayElements, | |
| 3118 jni_ReleaseByteArrayElements, | |
| 3119 jni_ReleaseCharArrayElements, | |
| 3120 jni_ReleaseShortArrayElements, | |
| 3121 jni_ReleaseIntArrayElements, | |
| 3122 jni_ReleaseLongArrayElements, | |
| 3123 jni_ReleaseFloatArrayElements, | |
| 3124 jni_ReleaseDoubleArrayElements, | |
| 3125 | |
| 3126 jni_GetBooleanArrayRegion, | |
| 3127 jni_GetByteArrayRegion, | |
| 3128 jni_GetCharArrayRegion, | |
| 3129 jni_GetShortArrayRegion, | |
| 3130 jni_GetIntArrayRegion, | |
| 3131 jni_GetLongArrayRegion, | |
| 3132 jni_GetFloatArrayRegion, | |
| 3133 jni_GetDoubleArrayRegion, | |
| 3134 | |
| 3135 jni_SetBooleanArrayRegion, | |
| 3136 jni_SetByteArrayRegion, | |
| 3137 jni_SetCharArrayRegion, | |
| 3138 jni_SetShortArrayRegion, | |
| 3139 jni_SetIntArrayRegion, | |
| 3140 jni_SetLongArrayRegion, | |
| 3141 jni_SetFloatArrayRegion, | |
| 3142 jni_SetDoubleArrayRegion, | |
| 3143 | |
| 3144 jni_RegisterNatives, | |
| 3145 jni_UnregisterNatives, | |
| 3146 | |
| 3147 jni_MonitorEnter, | |
| 3148 jni_MonitorExit, | |
| 3149 | |
| 3150 jni_GetJavaVM, | |
| 3151 | |
| 3152 jni_GetStringRegion, | |
| 3153 jni_GetStringUTFRegion, | |
| 3154 | |
| 3155 jni_GetPrimitiveArrayCritical, | |
| 3156 jni_ReleasePrimitiveArrayCritical, | |
| 3157 | |
| 3158 jni_GetStringCritical, | |
| 3159 jni_ReleaseStringCritical, | |
| 3160 | |
| 3161 jni_NewWeakGlobalRef, | |
| 3162 jni_DeleteWeakGlobalRef, | |
| 3163 | |
| 3164 jni_ExceptionCheck, | |
| 3165 | |
| 3166 jni_NewDirectByteBuffer, | |
| 3167 jni_GetDirectBufferAddress, | |
| 3168 jni_GetDirectBufferCapacity, | |
| 3169 | |
| 3170 // New 1_6 features | |
| 3171 | |
| 3172 jni_GetObjectRefType | |
| 3173 }; | |
| 3174 | |
| 3175 | |
| 3176 // For jvmti use to modify jni function table. | |
| 3177 // Java threads in native contiues to run until it is transitioned | |
| 3178 // to VM at safepoint. Before the transition or before it is blocked | |
| 3179 // for safepoint it may access jni function table. VM could crash if | |
| 3180 // any java thread access the jni function table in the middle of memcpy. | |
| 3181 // To avoid this each function pointers are copied automically. | |
| 3182 void copy_jni_function_table(const struct JNINativeInterface_ *new_jni_NativeInterface) { | |
| 3183 assert(SafepointSynchronize::is_at_safepoint(), "must be at safepoint"); | |
| 3184 intptr_t *a = (intptr_t *) jni_functions(); | |
| 3185 intptr_t *b = (intptr_t *) new_jni_NativeInterface; | |
| 3186 for (uint i=0; i < sizeof(struct JNINativeInterface_)/sizeof(void *); i++) { | |
| 3187 Atomic::store_ptr(*b++, a++); | |
| 3188 } | |
| 3189 } | |
| 3190 | |
| 3191 void quicken_jni_functions() { | |
| 3192 // Replace Get<Primitive>Field with fast versions | |
| 3193 if (UseFastJNIAccessors && !JvmtiExport::can_post_field_access() | |
| 3194 && !VerifyJNIFields && !TraceJNICalls && !CountJNICalls && !CheckJNICalls | |
| 3195 #if defined(_WINDOWS) && defined(IA32) && defined(COMPILER2) | |
| 3196 // windows x86 currently needs SEH wrapper and the gain of the fast | |
| 3197 // versions currently isn't certain for server vm on uniprocessor. | |
| 3198 && os::is_MP() | |
| 3199 #endif | |
| 3200 ) { | |
| 3201 address func; | |
| 3202 func = JNI_FastGetField::generate_fast_get_boolean_field(); | |
| 3203 if (func != (address)-1) { | |
| 3204 jni_NativeInterface.GetBooleanField = (GetBooleanField_t)func; | |
| 3205 } | |
| 3206 func = JNI_FastGetField::generate_fast_get_byte_field(); | |
| 3207 if (func != (address)-1) { | |
| 3208 jni_NativeInterface.GetByteField = (GetByteField_t)func; | |
| 3209 } | |
| 3210 func = JNI_FastGetField::generate_fast_get_char_field(); | |
| 3211 if (func != (address)-1) { | |
| 3212 jni_NativeInterface.GetCharField = (GetCharField_t)func; | |
| 3213 } | |
| 3214 func = JNI_FastGetField::generate_fast_get_short_field(); | |
| 3215 if (func != (address)-1) { | |
| 3216 jni_NativeInterface.GetShortField = (GetShortField_t)func; | |
| 3217 } | |
| 3218 func = JNI_FastGetField::generate_fast_get_int_field(); | |
| 3219 if (func != (address)-1) { | |
| 3220 jni_NativeInterface.GetIntField = (GetIntField_t)func; | |
| 3221 } | |
| 3222 func = JNI_FastGetField::generate_fast_get_long_field(); | |
| 3223 if (func != (address)-1) { | |
| 3224 jni_NativeInterface.GetLongField = (GetLongField_t)func; | |
| 3225 } | |
| 3226 func = JNI_FastGetField::generate_fast_get_float_field(); | |
| 3227 if (func != (address)-1) { | |
| 3228 jni_NativeInterface.GetFloatField = (GetFloatField_t)func; | |
| 3229 } | |
| 3230 func = JNI_FastGetField::generate_fast_get_double_field(); | |
| 3231 if (func != (address)-1) { | |
| 3232 jni_NativeInterface.GetDoubleField = (GetDoubleField_t)func; | |
| 3233 } | |
| 3234 } | |
| 3235 } | |
| 3236 | |
| 3237 // Returns the function structure | |
| 3238 struct JNINativeInterface_* jni_functions() { | |
| 3239 #ifndef JNICHECK_KERNEL | |
| 3240 if (CheckJNICalls) return jni_functions_check(); | |
| 3241 #else // JNICHECK_KERNEL | |
| 3242 if (CheckJNICalls) warning("-Xcheck:jni is not supported in kernel vm."); | |
| 3243 #endif // JNICHECK_KERNEL | |
| 3244 return &jni_NativeInterface; | |
| 3245 } | |
| 3246 | |
| 3247 // Returns the function structure | |
| 3248 struct JNINativeInterface_* jni_functions_nocheck() { | |
| 3249 return &jni_NativeInterface; | |
| 3250 } | |
| 3251 | |
| 3252 | |
| 3253 // Invocation API | |
| 3254 | |
| 3255 | |
| 3256 // Forward declaration | |
| 3257 extern const struct JNIInvokeInterface_ jni_InvokeInterface; | |
| 3258 | |
| 3259 // Global invocation API vars | |
| 3260 volatile jint vm_created = 0; | |
| 3261 // Indicate whether it is safe to recreate VM | |
| 3262 volatile jint safe_to_recreate_vm = 1; | |
| 3263 struct JavaVM_ main_vm = {&jni_InvokeInterface}; | |
| 3264 | |
| 3265 | |
| 3266 #define JAVASTACKSIZE (400 * 1024) /* Default size of a thread java stack */ | |
| 3267 enum { VERIFY_NONE, VERIFY_REMOTE, VERIFY_ALL }; | |
| 3268 | |
| 3269 HS_DTRACE_PROBE_DECL1(hotspot_jni, GetDefaultJavaVMInitArgs__entry, void*); | |
| 3270 DT_RETURN_MARK_DECL(GetDefaultJavaVMInitArgs, jint); | |
| 3271 | |
| 3272 _JNI_IMPORT_OR_EXPORT_ jint JNICALL JNI_GetDefaultJavaVMInitArgs(void *args_) { | |
| 3273 HS_DTRACE_PROBE1(hotspot_jni, GetDefaultJavaVMInitArgs__entry, args_); | |
| 3274 JDK1_1InitArgs *args = (JDK1_1InitArgs *)args_; | |
| 3275 jint ret = JNI_ERR; | |
| 3276 DT_RETURN_MARK(GetDefaultJavaVMInitArgs, jint, (const jint&)ret); | |
| 3277 | |
| 3278 if (Threads::is_supported_jni_version(args->version)) { | |
| 3279 ret = JNI_OK; | |
| 3280 } | |
| 3281 // 1.1 style no longer supported in hotspot. | |
| 3282 // According the JNI spec, we should update args->version on return. | |
| 3283 // We also use the structure to communicate with launcher about default | |
| 3284 // stack size. | |
| 3285 if (args->version == JNI_VERSION_1_1) { | |
| 3286 args->version = JNI_VERSION_1_2; | |
| 3287 // javaStackSize is int in arguments structure | |
| 3288 assert(jlong(ThreadStackSize) * K < INT_MAX, "integer overflow"); | |
| 3289 args->javaStackSize = (jint)(ThreadStackSize * K); | |
| 3290 } | |
| 3291 return ret; | |
| 3292 } | |
| 3293 | |
| 3779 | 3294 #ifndef PRODUCT |
| 3295 | |
| 3296 #include "utilities/quickSort.hpp" | |
| 3297 | |
| 3298 void execute_internal_vm_tests() { | |
| 3299 if (ExecuteInternalVMTests) { | |
| 3300 assert(QuickSort::test_quick_sort(), "test_quick_sort failed"); | |
| 3301 tty->print_cr("All tests passed"); | |
| 3302 } | |
| 3303 } | |
| 3304 | |
| 3305 #endif | |
| 3306 | |
| 0 | 3307 HS_DTRACE_PROBE_DECL3(hotspot_jni, CreateJavaVM__entry, vm, penv, args); |
| 3308 DT_RETURN_MARK_DECL(CreateJavaVM, jint); | |
| 3309 | |
| 3310 _JNI_IMPORT_OR_EXPORT_ jint JNICALL JNI_CreateJavaVM(JavaVM **vm, void **penv, void *args) { | |
| 3311 HS_DTRACE_PROBE3(hotspot_jni, CreateJavaVM__entry, vm, penv, args); | |
| 3312 | |
| 3313 jint result = JNI_ERR; | |
| 3314 DT_RETURN_MARK(CreateJavaVM, jint, (const jint&)result); | |
| 3315 | |
| 1078 | 3316 // We're about to use Atomic::xchg for synchronization. Some Zero |
| 3317 // platforms use the GCC builtin __sync_lock_test_and_set for this, | |
| 3318 // but __sync_lock_test_and_set is not guaranteed to do what we want | |
| 3319 // on all architectures. So we check it works before relying on it. | |
| 3320 #if defined(ZERO) && defined(ASSERT) | |
| 3321 { | |
| 3322 jint a = 0xcafebabe; | |
| 3323 jint b = Atomic::xchg(0xdeadbeef, &a); | |
| 3324 void *c = &a; | |
| 3325 void *d = Atomic::xchg_ptr(&b, &c); | |
| 1132 | 3326 assert(a == (jint) 0xdeadbeef && b == (jint) 0xcafebabe, "Atomic::xchg() works"); |
| 1078 | 3327 assert(c == &b && d == &a, "Atomic::xchg_ptr() works"); |
| 3328 } | |
| 3329 #endif // ZERO && ASSERT | |
| 3330 | |
| 0 | 3331 // At the moment it's only possible to have one Java VM, |
| 3332 // since some of the runtime state is in global variables. | |
| 3333 | |
| 3334 // We cannot use our mutex locks here, since they only work on | |
| 3335 // Threads. We do an atomic compare and exchange to ensure only | |
| 3336 // one thread can call this method at a time | |
| 3337 | |
| 3338 // We use Atomic::xchg rather than Atomic::add/dec since on some platforms | |
| 3339 // the add/dec implementations are dependent on whether we are running | |
| 3340 // on a multiprocessor, and at this stage of initialization the os::is_MP | |
| 3341 // function used to determine this will always return false. Atomic::xchg | |
| 3342 // does not have this problem. | |
| 3343 if (Atomic::xchg(1, &vm_created) == 1) { | |
| 3344 return JNI_ERR; // already created, or create attempt in progress | |
| 3345 } | |
| 3346 if (Atomic::xchg(0, &safe_to_recreate_vm) == 0) { | |
| 3347 return JNI_ERR; // someone tried and failed and retry not allowed. | |
| 3348 } | |
| 3349 | |
| 3350 assert(vm_created == 1, "vm_created is true during the creation"); | |
| 3351 | |
| 3352 /** | |
| 3353 * Certain errors during initialization are recoverable and do not | |
| 3354 * prevent this method from being called again at a later time | |
| 3355 * (perhaps with different arguments). However, at a certain | |
| 3356 * point during initialization if an error occurs we cannot allow | |
| 3357 * this function to be called again (or it will crash). In those | |
| 3358 * situations, the 'canTryAgain' flag is set to false, which atomically | |
| 3359 * sets safe_to_recreate_vm to 1, such that any new call to | |
| 3360 * JNI_CreateJavaVM will immediately fail using the above logic. | |
| 3361 */ | |
| 3362 bool can_try_again = true; | |
| 3363 | |
| 3364 result = Threads::create_vm((JavaVMInitArgs*) args, &can_try_again); | |
| 3365 if (result == JNI_OK) { | |
| 3366 JavaThread *thread = JavaThread::current(); | |
| 3367 /* thread is thread_in_vm here */ | |
| 3368 *vm = (JavaVM *)(&main_vm); | |
| 3369 *(JNIEnv**)penv = thread->jni_environment(); | |
| 3370 | |
| 3371 // Tracks the time application was running before GC | |
| 3372 RuntimeService::record_application_start(); | |
| 3373 | |
| 3374 // Notify JVMTI | |
| 3375 if (JvmtiExport::should_post_thread_life()) { | |
| 3376 JvmtiExport::post_thread_start(thread); | |
| 3377 } | |
| 3378 // Check if we should compile all classes on bootclasspath | |
| 3379 NOT_PRODUCT(if (CompileTheWorld) ClassLoader::compile_the_world();) | |
| 3380 // Since this is not a JVM_ENTRY we have to set the thread state manually before leaving. | |
| 3381 ThreadStateTransition::transition_and_fence(thread, _thread_in_vm, _thread_in_native); | |
| 3382 } else { | |
| 3383 if (can_try_again) { | |
| 3384 // reset safe_to_recreate_vm to 1 so that retrial would be possible | |
| 3385 safe_to_recreate_vm = 1; | |
| 3386 } | |
| 3387 | |
| 3388 // Creation failed. We must reset vm_created | |
| 3389 *vm = 0; | |
| 3390 *(JNIEnv**)penv = 0; | |
| 3391 // reset vm_created last to avoid race condition. Use OrderAccess to | |
| 3392 // control both compiler and architectural-based reordering. | |
| 3393 OrderAccess::release_store(&vm_created, 0); | |
| 3394 } | |
| 3395 | |
|
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|
3396 NOT_PRODUCT(test_error_handler(ErrorHandlerTest)); |
| 3779 | 3397 NOT_PRODUCT(execute_internal_vm_tests()); |
| 0 | 3398 return result; |
| 3399 } | |
| 3400 | |
| 3401 HS_DTRACE_PROBE_DECL3(hotspot_jni, GetCreatedJavaVMs__entry, \ | |
| 3402 JavaVM**, jsize, jsize*); | |
| 3403 HS_DTRACE_PROBE_DECL1(hotspot_jni, GetCreatedJavaVMs__return, jint); | |
| 3404 | |
| 3405 _JNI_IMPORT_OR_EXPORT_ jint JNICALL JNI_GetCreatedJavaVMs(JavaVM **vm_buf, jsize bufLen, jsize *numVMs) { | |
| 3406 // See bug 4367188, the wrapper can sometimes cause VM crashes | |
| 3407 // JNIWrapper("GetCreatedJavaVMs"); | |
| 3408 HS_DTRACE_PROBE3(hotspot_jni, GetCreatedJavaVMs__entry, \ | |
| 3409 vm_buf, bufLen, numVMs); | |
| 3410 if (vm_created) { | |
| 3411 if (numVMs != NULL) *numVMs = 1; | |
| 3412 if (bufLen > 0) *vm_buf = (JavaVM *)(&main_vm); | |
| 3413 } else { | |
| 3414 if (numVMs != NULL) *numVMs = 0; | |
| 3415 } | |
| 3416 HS_DTRACE_PROBE1(hotspot_jni, GetCreatedJavaVMs__return, JNI_OK); | |
| 3417 return JNI_OK; | |
| 3418 } | |
| 3419 | |
| 3420 extern "C" { | |
| 3421 | |
| 3422 DT_RETURN_MARK_DECL(DestroyJavaVM, jint); | |
| 3423 | |
| 3424 jint JNICALL jni_DestroyJavaVM(JavaVM *vm) { | |
| 3425 DTRACE_PROBE1(hotspot_jni, DestroyJavaVM__entry, vm); | |
| 3426 jint res = JNI_ERR; | |
| 3427 DT_RETURN_MARK(DestroyJavaVM, jint, (const jint&)res); | |
| 3428 | |
| 3429 if (!vm_created) { | |
| 3430 res = JNI_ERR; | |
| 3431 return res; | |
| 3432 } | |
| 3433 | |
| 3434 JNIWrapper("DestroyJavaVM"); | |
| 3435 JNIEnv *env; | |
| 3436 JavaVMAttachArgs destroyargs; | |
| 3437 destroyargs.version = CurrentVersion; | |
| 3438 destroyargs.name = (char *)"DestroyJavaVM"; | |
| 3439 destroyargs.group = NULL; | |
| 3440 res = vm->AttachCurrentThread((void **)&env, (void *)&destroyargs); | |
| 3441 if (res != JNI_OK) { | |
| 3442 return res; | |
| 3443 } | |
| 3444 | |
| 3445 // Since this is not a JVM_ENTRY we have to set the thread state manually before entering. | |
| 3446 JavaThread* thread = JavaThread::current(); | |
| 3447 ThreadStateTransition::transition_from_native(thread, _thread_in_vm); | |
| 3448 if (Threads::destroy_vm()) { | |
| 3449 // Should not change thread state, VM is gone | |
| 3450 vm_created = false; | |
| 3451 res = JNI_OK; | |
| 3452 return res; | |
| 3453 } else { | |
| 3454 ThreadStateTransition::transition_and_fence(thread, _thread_in_vm, _thread_in_native); | |
| 3455 res = JNI_ERR; | |
| 3456 return res; | |
| 3457 } | |
| 3458 } | |
| 3459 | |
| 3460 | |
| 3461 static jint attach_current_thread(JavaVM *vm, void **penv, void *_args, bool daemon) { | |
| 3462 JavaVMAttachArgs *args = (JavaVMAttachArgs *) _args; | |
| 3463 | |
| 3464 // Check below commented out from JDK1.2fcs as well | |
| 3465 /* | |
| 3466 if (args && (args->version != JNI_VERSION_1_1 || args->version != JNI_VERSION_1_2)) { | |
| 3467 return JNI_EVERSION; | |
| 3468 } | |
| 3469 */ | |
| 3470 | |
| 3471 Thread* t = ThreadLocalStorage::get_thread_slow(); | |
| 3472 if (t != NULL) { | |
| 3473 // If the thread has been attached this operation is a no-op | |
| 3474 *(JNIEnv**)penv = ((JavaThread*) t)->jni_environment(); | |
| 3475 return JNI_OK; | |
| 3476 } | |
| 3477 | |
| 3478 // Create a thread and mark it as attaching so it will be skipped by the | |
| 3479 // ThreadsListEnumerator - see CR 6404306 | |
| 3480 JavaThread* thread = new JavaThread(true); | |
| 3481 | |
| 3482 // Set correct safepoint info. The thread is going to call into Java when | |
| 3483 // initializing the Java level thread object. Hence, the correct state must | |
| 3484 // be set in order for the Safepoint code to deal with it correctly. | |
| 3485 thread->set_thread_state(_thread_in_vm); | |
| 3486 // Must do this before initialize_thread_local_storage | |
| 3487 thread->record_stack_base_and_size(); | |
|
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diff
changeset
|
3488 |
| 0 | 3489 thread->initialize_thread_local_storage(); |
| 3490 | |
| 3491 if (!os::create_attached_thread(thread)) { | |
| 3492 delete thread; | |
| 3493 return JNI_ERR; | |
| 3494 } | |
|
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diff
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|
3495 // Enable stack overflow checks |
|
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diff
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|
3496 thread->create_stack_guard_pages(); |
|
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|
3497 |
| 0 | 3498 thread->initialize_tlab(); |
| 3499 | |
|
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|
3500 thread->cache_global_variables(); |
|
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|
3501 |
| 0 | 3502 // Crucial that we do not have a safepoint check for this thread, since it has |
| 3503 // not been added to the Thread list yet. | |
| 3504 { Threads_lock->lock_without_safepoint_check(); | |
| 3505 // This must be inside this lock in order to get FullGCALot to work properly, i.e., to | |
| 3506 // avoid this thread trying to do a GC before it is added to the thread-list | |
| 3507 thread->set_active_handles(JNIHandleBlock::allocate_block()); | |
| 3508 Threads::add(thread, daemon); | |
| 3509 Threads_lock->unlock(); | |
| 3510 } | |
| 3511 // Create thread group and name info from attach arguments | |
| 3512 oop group = NULL; | |
| 3513 char* thread_name = NULL; | |
| 3514 if (args != NULL && Threads::is_supported_jni_version(args->version)) { | |
| 3515 group = JNIHandles::resolve(args->group); | |
| 3516 thread_name = args->name; // may be NULL | |
| 3517 } | |
| 3518 if (group == NULL) group = Universe::main_thread_group(); | |
| 3519 | |
| 3520 // Create Java level thread object and attach it to this thread | |
| 3521 bool attach_failed = false; | |
| 3522 { | |
| 3523 EXCEPTION_MARK; | |
| 3524 HandleMark hm(THREAD); | |
| 3525 Handle thread_group(THREAD, group); | |
| 3526 thread->allocate_threadObj(thread_group, thread_name, daemon, THREAD); | |
| 3527 if (HAS_PENDING_EXCEPTION) { | |
| 3528 CLEAR_PENDING_EXCEPTION; | |
| 3529 // cleanup outside the handle mark. | |
| 3530 attach_failed = true; | |
| 3531 } | |
| 3532 } | |
| 3533 | |
| 3534 if (attach_failed) { | |
| 3535 // Added missing cleanup | |
| 3536 thread->cleanup_failed_attach_current_thread(); | |
| 3537 return JNI_ERR; | |
| 3538 } | |
| 3539 | |
| 3540 // mark the thread as no longer attaching | |
| 3541 // this uses a fence to push the change through so we don't have | |
| 3542 // to regrab the threads_lock | |
| 3543 thread->set_attached(); | |
| 3544 | |
| 3545 // Set java thread status. | |
| 3546 java_lang_Thread::set_thread_status(thread->threadObj(), | |
| 3547 java_lang_Thread::RUNNABLE); | |
| 3548 | |
| 3549 // Notify the debugger | |
| 3550 if (JvmtiExport::should_post_thread_life()) { | |
| 3551 JvmtiExport::post_thread_start(thread); | |
| 3552 } | |
| 3553 | |
| 3554 *(JNIEnv**)penv = thread->jni_environment(); | |
| 3555 | |
| 3556 // Now leaving the VM, so change thread_state. This is normally automatically taken care | |
| 3557 // of in the JVM_ENTRY. But in this situation we have to do it manually. Notice, that by | |
| 3558 // using ThreadStateTransition::transition, we do a callback to the safepoint code if | |
| 3559 // needed. | |
| 3560 | |
| 3561 ThreadStateTransition::transition_and_fence(thread, _thread_in_vm, _thread_in_native); | |
| 3562 | |
| 3563 // Perform any platform dependent FPU setup | |
| 3564 os::setup_fpu(); | |
| 3565 | |
| 3566 return JNI_OK; | |
| 3567 } | |
| 3568 | |
| 3569 | |
| 3570 jint JNICALL jni_AttachCurrentThread(JavaVM *vm, void **penv, void *_args) { | |
| 3571 DTRACE_PROBE3(hotspot_jni, AttachCurrentThread__entry, vm, penv, _args); | |
| 3572 if (!vm_created) { | |
| 3573 DTRACE_PROBE1(hotspot_jni, AttachCurrentThread__return, JNI_ERR); | |
| 3574 return JNI_ERR; | |
| 3575 } | |
| 3576 | |
| 3577 JNIWrapper("AttachCurrentThread"); | |
| 3578 jint ret = attach_current_thread(vm, penv, _args, false); | |
| 3579 DTRACE_PROBE1(hotspot_jni, AttachCurrentThread__return, ret); | |
| 3580 return ret; | |
| 3581 } | |
| 3582 | |
| 3583 | |
| 3584 jint JNICALL jni_DetachCurrentThread(JavaVM *vm) { | |
| 3585 DTRACE_PROBE1(hotspot_jni, DetachCurrentThread__entry, vm); | |
| 3586 VM_Exit::block_if_vm_exited(); | |
| 3587 | |
| 3588 JNIWrapper("DetachCurrentThread"); | |
| 3589 | |
| 3590 // If the thread has been deattacted the operations is a no-op | |
| 3591 if (ThreadLocalStorage::thread() == NULL) { | |
| 3592 DTRACE_PROBE1(hotspot_jni, DetachCurrentThread__return, JNI_OK); | |
| 3593 return JNI_OK; | |
| 3594 } | |
| 3595 | |
| 3596 JavaThread* thread = JavaThread::current(); | |
| 3597 if (thread->has_last_Java_frame()) { | |
| 3598 DTRACE_PROBE1(hotspot_jni, DetachCurrentThread__return, JNI_ERR); | |
| 3599 // Can't detach a thread that's running java, that can't work. | |
| 3600 return JNI_ERR; | |
| 3601 } | |
| 3602 | |
| 3603 // Safepoint support. Have to do call-back to safepoint code, if in the | |
| 3604 // middel of a safepoint operation | |
| 3605 ThreadStateTransition::transition_from_native(thread, _thread_in_vm); | |
| 3606 | |
| 3607 // XXX: Note that JavaThread::exit() call below removes the guards on the | |
| 3608 // stack pages set up via enable_stack_{red,yellow}_zone() calls | |
| 3609 // above in jni_AttachCurrentThread. Unfortunately, while the setting | |
| 3610 // of the guards is visible in jni_AttachCurrentThread above, | |
| 3611 // the removal of the guards is buried below in JavaThread::exit() | |
| 3612 // here. The abstraction should be more symmetrically either exposed | |
| 3613 // or hidden (e.g. it could probably be hidden in the same | |
| 3614 // (platform-dependent) methods where we do alternate stack | |
| 3615 // maintenance work?) | |
| 3616 thread->exit(false, JavaThread::jni_detach); | |
| 3617 delete thread; | |
| 3618 | |
| 3619 DTRACE_PROBE1(hotspot_jni, DetachCurrentThread__return, JNI_OK); | |
| 3620 return JNI_OK; | |
| 3621 } | |
| 3622 | |
| 3623 DT_RETURN_MARK_DECL(GetEnv, jint); | |
| 3624 | |
| 3625 jint JNICALL jni_GetEnv(JavaVM *vm, void **penv, jint version) { | |
| 3626 DTRACE_PROBE3(hotspot_jni, GetEnv__entry, vm, penv, version); | |
| 3627 jint ret = JNI_ERR; | |
| 3628 DT_RETURN_MARK(GetEnv, jint, (const jint&)ret); | |
| 3629 | |
| 3630 if (!vm_created) { | |
| 3631 *penv = NULL; | |
| 3632 ret = JNI_EDETACHED; | |
| 3633 return ret; | |
| 3634 } | |
| 3635 | |
| 3636 if (JvmtiExport::is_jvmti_version(version)) { | |
| 3637 ret = JvmtiExport::get_jvmti_interface(vm, penv, version); | |
| 3638 return ret; | |
| 3639 } | |
| 3640 | |
| 3641 #ifndef JVMPI_VERSION_1 | |
| 3642 // need these in order to be polite about older agents | |
| 3643 #define JVMPI_VERSION_1 ((jint)0x10000001) | |
| 3644 #define JVMPI_VERSION_1_1 ((jint)0x10000002) | |
| 3645 #define JVMPI_VERSION_1_2 ((jint)0x10000003) | |
| 3646 #endif // !JVMPI_VERSION_1 | |
| 3647 | |
| 3648 Thread* thread = ThreadLocalStorage::thread(); | |
| 3649 if (thread != NULL && thread->is_Java_thread()) { | |
| 3650 if (Threads::is_supported_jni_version_including_1_1(version)) { | |
| 3651 *(JNIEnv**)penv = ((JavaThread*) thread)->jni_environment(); | |
| 3652 ret = JNI_OK; | |
| 3653 return ret; | |
| 3654 | |
| 3655 } else if (version == JVMPI_VERSION_1 || | |
| 3656 version == JVMPI_VERSION_1_1 || | |
| 3657 version == JVMPI_VERSION_1_2) { | |
| 3658 tty->print_cr("ERROR: JVMPI, an experimental interface, is no longer supported."); | |
| 3659 tty->print_cr("Please use the supported interface: the JVM Tool Interface (JVM TI)."); | |
| 3660 ret = JNI_EVERSION; | |
| 3661 return ret; | |
| 3662 } else if (JvmtiExport::is_jvmdi_version(version)) { | |
| 3663 tty->print_cr("FATAL ERROR: JVMDI is no longer supported."); | |
| 3664 tty->print_cr("Please use the supported interface: the JVM Tool Interface (JVM TI)."); | |
| 3665 ret = JNI_EVERSION; | |
| 3666 return ret; | |
| 3667 } else { | |
| 3668 *penv = NULL; | |
| 3669 ret = JNI_EVERSION; | |
| 3670 return ret; | |
| 3671 } | |
| 3672 } else { | |
| 3673 *penv = NULL; | |
| 3674 ret = JNI_EDETACHED; | |
| 3675 return ret; | |
| 3676 } | |
| 3677 } | |
| 3678 | |
| 3679 | |
| 3680 jint JNICALL jni_AttachCurrentThreadAsDaemon(JavaVM *vm, void **penv, void *_args) { | |
| 3681 DTRACE_PROBE3(hotspot_jni, AttachCurrentThreadAsDaemon__entry, vm, penv, _args); | |
| 3682 if (!vm_created) { | |
| 3683 DTRACE_PROBE1(hotspot_jni, AttachCurrentThreadAsDaemon__return, JNI_ERR); | |
| 3684 return JNI_ERR; | |
| 3685 } | |
| 3686 | |
| 3687 JNIWrapper("AttachCurrentThreadAsDaemon"); | |
| 3688 jint ret = attach_current_thread(vm, penv, _args, true); | |
| 3689 DTRACE_PROBE1(hotspot_jni, AttachCurrentThreadAsDaemon__return, ret); | |
| 3690 return ret; | |
| 3691 } | |
| 3692 | |
| 3693 | |
| 3694 } // End extern "C" | |
| 3695 | |
| 3696 const struct JNIInvokeInterface_ jni_InvokeInterface = { | |
| 3697 NULL, | |
| 3698 NULL, | |
| 3699 NULL, | |
| 3700 | |
| 3701 jni_DestroyJavaVM, | |
| 3702 jni_AttachCurrentThread, | |
| 3703 jni_DetachCurrentThread, | |
| 3704 jni_GetEnv, | |
| 3705 jni_AttachCurrentThreadAsDaemon | |
| 3706 }; |