1 /*
2 * Copyright (c) 1997, 2020, Oracle and/or its affiliates. All rights reserved.
3 * Copyright (c) 2012 Red Hat, Inc.
4 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
5 *
6 * This code is free software; you can redistribute it and/or modify it
7 * under the terms of the GNU General Public License version 2 only, as
8 * published by the Free Software Foundation.
9 *
10 * This code is distributed in the hope that it will be useful, but WITHOUT
11 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
12 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
13 * version 2 for more details (a copy is included in the LICENSE file that
14 * accompanied this code).
15 *
16 * You should have received a copy of the GNU General Public License version
17 * 2 along with this work; if not, write to the Free Software Foundation,
18 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
19 *
20 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
21 * or visit www.oracle.com if you need additional information or have any
22 * questions.
23 *
24 */
25
26 #include "precompiled.hpp"
27 #include "jni.h"
28 #include "jvm.h"
29 #include "ci/ciReplay.hpp"
30 #include "classfile/altHashing.hpp"
31 #include "classfile/classFileStream.hpp"
32 #include "classfile/classLoader.hpp"
33 #include "classfile/javaClasses.hpp"
34 #include "classfile/javaClasses.inline.hpp"
35 #include "classfile/moduleEntry.hpp"
36 #include "classfile/modules.hpp"
37 #include "classfile/symbolTable.hpp"
38 #include "classfile/systemDictionary.hpp"
39 #include "classfile/vmSymbols.hpp"
40 #include "gc/shared/gcLocker.inline.hpp"
41 #include "interpreter/linkResolver.hpp"
42 #include "jfr/jfrEvents.hpp"
43 #include "jfr/support/jfrThreadId.hpp"
44 #include "logging/log.hpp"
45 #include "memory/allocation.hpp"
46 #include "memory/allocation.inline.hpp"
47 #include "memory/oopFactory.hpp"
48 #include "memory/resourceArea.hpp"
49 #include "memory/universe.hpp"
50 #include "oops/access.inline.hpp"
51 #include "oops/arrayOop.inline.hpp"
52 #include "oops/instanceKlass.inline.hpp"
53 #include "oops/instanceOop.hpp"
54 #include "oops/markWord.hpp"
55 #include "oops/method.hpp"
56 #include "oops/objArrayKlass.hpp"
57 #include "oops/objArrayOop.inline.hpp"
58 #include "oops/oop.inline.hpp"
59 #include "oops/symbol.hpp"
60 #include "oops/typeArrayKlass.hpp"
61 #include "oops/typeArrayOop.inline.hpp"
62 #include "prims/jniCheck.hpp"
63 #include "prims/jniExport.hpp"
64 #include "prims/jniFastGetField.hpp"
65 #include "prims/jvm_misc.hpp"
66 #include "prims/jvmtiExport.hpp"
67 #include "prims/jvmtiThreadState.hpp"
68 #include "runtime/atomic.hpp"
69 #include "runtime/fieldDescriptor.inline.hpp"
70 #include "runtime/handles.inline.hpp"
71 #include "runtime/interfaceSupport.inline.hpp"
72 #include "runtime/java.hpp"
73 #include "runtime/javaCalls.hpp"
74 #include "runtime/jfieldIDWorkaround.hpp"
75 #include "runtime/jniHandles.inline.hpp"
76 #include "runtime/reflection.hpp"
77 #include "runtime/safepointVerifiers.hpp"
78 #include "runtime/sharedRuntime.hpp"
79 #include "runtime/signature.hpp"
80 #include "runtime/thread.inline.hpp"
81 #include "runtime/vmOperations.hpp"
82 #include "services/memTracker.hpp"
83 #include "services/runtimeService.hpp"
84 #include "utilities/defaultStream.hpp"
85 #include "utilities/dtrace.hpp"
86 #include "utilities/events.hpp"
87 #include "utilities/histogram.hpp"
88 #include "utilities/macros.hpp"
89 #include "utilities/vmError.hpp"
90 #if INCLUDE_JVMCI
91 #include "jvmci/jvmciCompiler.hpp"
92 #endif
93
94 static jint CurrentVersion = JNI_VERSION_10;
95
96 #ifdef _WIN32
97 extern LONG WINAPI topLevelExceptionFilter(_EXCEPTION_POINTERS* );
98 #endif
99
100 // The DT_RETURN_MARK macros create a scoped object to fire the dtrace
101 // '-return' probe regardless of the return path is taken out of the function.
102 // Methods that have multiple return paths use this to avoid having to
103 // instrument each return path. Methods that use CHECK or THROW must use this
104 // since those macros can cause an immedate uninstrumented return.
105 //
106 // In order to get the return value, a reference to the variable containing
107 // the return value must be passed to the contructor of the object, and
108 // the return value must be set before return (since the mark object has
109 // a reference to it).
110 //
111 // Example:
112 // DT_RETURN_MARK_DECL(SomeFunc, int);
113 // JNI_ENTRY(int, SomeFunc, ...)
114 // int return_value = 0;
115 // DT_RETURN_MARK(SomeFunc, int, (const int&)return_value);
116 // foo(CHECK_0)
117 // return_value = 5;
118 // return return_value;
119 // JNI_END
120 #define DT_RETURN_MARK_DECL(name, type, probe) \
121 DTRACE_ONLY( \
122 class DTraceReturnProbeMark_##name { \
123 public: \
124 const type& _ret_ref; \
125 DTraceReturnProbeMark_##name(const type& v) : _ret_ref(v) {} \
126 ~DTraceReturnProbeMark_##name() { \
127 probe; \
128 } \
129 } \
130 )
131 // Void functions are simpler since there's no return value
132 #define DT_VOID_RETURN_MARK_DECL(name, probe) \
133 DTRACE_ONLY( \
134 class DTraceReturnProbeMark_##name { \
135 public: \
136 ~DTraceReturnProbeMark_##name() { \
137 probe; \
138 } \
139 } \
140 )
141
142 // Place these macros in the function to mark the return. Non-void
143 // functions need the type and address of the return value.
144 #define DT_RETURN_MARK(name, type, ref) \
145 DTRACE_ONLY( DTraceReturnProbeMark_##name dtrace_return_mark(ref) )
146 #define DT_VOID_RETURN_MARK(name) \
147 DTRACE_ONLY( DTraceReturnProbeMark_##name dtrace_return_mark )
148
149
150 // Use these to select distinct code for floating-point vs. non-floating point
151 // situations. Used from within common macros where we need slightly
152 // different behavior for Float/Double
153 #define FP_SELECT_Boolean(intcode, fpcode) intcode
154 #define FP_SELECT_Byte(intcode, fpcode) intcode
155 #define FP_SELECT_Char(intcode, fpcode) intcode
156 #define FP_SELECT_Short(intcode, fpcode) intcode
157 #define FP_SELECT_Object(intcode, fpcode) intcode
158 #define FP_SELECT_Int(intcode, fpcode) intcode
159 #define FP_SELECT_Long(intcode, fpcode) intcode
160 #define FP_SELECT_Float(intcode, fpcode) fpcode
161 #define FP_SELECT_Double(intcode, fpcode) fpcode
162 #define FP_SELECT(TypeName, intcode, fpcode) \
163 FP_SELECT_##TypeName(intcode, fpcode)
164
165 // Choose DT_RETURN_MARK macros based on the type: float/double -> void
166 // (dtrace doesn't do FP yet)
167 #define DT_RETURN_MARK_DECL_FOR(TypeName, name, type, probe) \
168 FP_SELECT(TypeName, \
169 DT_RETURN_MARK_DECL(name, type, probe), DT_VOID_RETURN_MARK_DECL(name, probe) )
170 #define DT_RETURN_MARK_FOR(TypeName, name, type, ref) \
171 FP_SELECT(TypeName, \
172 DT_RETURN_MARK(name, type, ref), DT_VOID_RETURN_MARK(name) )
173
174
175 // out-of-line helpers for class jfieldIDWorkaround:
176
177 bool jfieldIDWorkaround::is_valid_jfieldID(Klass* k, jfieldID id) {
178 if (jfieldIDWorkaround::is_instance_jfieldID(k, id)) {
179 uintptr_t as_uint = (uintptr_t) id;
180 intptr_t offset = raw_instance_offset(id);
181 if (is_checked_jfieldID(id)) {
182 if (!klass_hash_ok(k, id)) {
183 return false;
184 }
185 }
186 return InstanceKlass::cast(k)->contains_field_offset(offset);
187 } else {
188 JNIid* result = (JNIid*) id;
189 #ifdef ASSERT
190 return result != NULL && result->is_static_field_id();
191 #else
192 return result != NULL;
193 #endif
194 }
195 }
196
197
198 intptr_t jfieldIDWorkaround::encode_klass_hash(Klass* k, intptr_t offset) {
199 if (offset <= small_offset_mask) {
200 Klass* field_klass = k;
201 Klass* super_klass = field_klass->super();
202 // With compressed oops the most super class with nonstatic fields would
203 // be the owner of fields embedded in the header.
204 while (InstanceKlass::cast(super_klass)->has_nonstatic_fields() &&
205 InstanceKlass::cast(super_klass)->contains_field_offset(offset)) {
206 field_klass = super_klass; // super contains the field also
207 super_klass = field_klass->super();
208 }
209 debug_only(NoSafepointVerifier nosafepoint;)
210 uintptr_t klass_hash = field_klass->identity_hash();
211 return ((klass_hash & klass_mask) << klass_shift) | checked_mask_in_place;
212 } else {
213 #if 0
214 #ifndef PRODUCT
215 {
216 ResourceMark rm;
217 warning("VerifyJNIFields: long offset %d in %s", offset, k->external_name());
218 }
219 #endif
220 #endif
221 return 0;
222 }
223 }
224
225 bool jfieldIDWorkaround::klass_hash_ok(Klass* k, jfieldID id) {
226 uintptr_t as_uint = (uintptr_t) id;
227 intptr_t klass_hash = (as_uint >> klass_shift) & klass_mask;
228 do {
229 debug_only(NoSafepointVerifier nosafepoint;)
230 // Could use a non-blocking query for identity_hash here...
231 if ((k->identity_hash() & klass_mask) == klass_hash)
232 return true;
233 k = k->super();
234 } while (k != NULL);
235 return false;
236 }
237
238 void jfieldIDWorkaround::verify_instance_jfieldID(Klass* k, jfieldID id) {
239 guarantee(jfieldIDWorkaround::is_instance_jfieldID(k, id), "must be an instance field" );
240 uintptr_t as_uint = (uintptr_t) id;
241 intptr_t offset = raw_instance_offset(id);
242 if (VerifyJNIFields) {
243 if (is_checked_jfieldID(id)) {
244 guarantee(klass_hash_ok(k, id),
245 "Bug in native code: jfieldID class must match object");
246 } else {
247 #if 0
248 #ifndef PRODUCT
249 if (Verbose) {
250 ResourceMark rm;
251 warning("VerifyJNIFields: unverified offset %d for %s", offset, k->external_name());
252 }
253 #endif
254 #endif
255 }
256 }
257 guarantee(InstanceKlass::cast(k)->contains_field_offset(offset),
258 "Bug in native code: jfieldID offset must address interior of object");
259 }
260
261 // Wrapper to trace JNI functions
262
263 #ifdef ASSERT
264 Histogram* JNIHistogram;
265 static volatile int JNIHistogram_lock = 0;
266
267 class JNIHistogramElement : public HistogramElement {
268 public:
269 JNIHistogramElement(const char* name);
270 };
271
272 JNIHistogramElement::JNIHistogramElement(const char* elementName) {
273 _name = elementName;
274 uintx count = 0;
275
276 while (Atomic::cmpxchg(&JNIHistogram_lock, 0, 1) != 0) {
277 while (Atomic::load_acquire(&JNIHistogram_lock) != 0) {
278 count +=1;
279 if ( (WarnOnStalledSpinLock > 0)
280 && (count % WarnOnStalledSpinLock == 0)) {
281 warning("JNIHistogram_lock seems to be stalled");
282 }
283 }
284 }
285
286
287 if(JNIHistogram == NULL)
288 JNIHistogram = new Histogram("JNI Call Counts",100);
289
290 JNIHistogram->add_element(this);
291 Atomic::dec(&JNIHistogram_lock);
292 }
293
294 #define JNICountWrapper(arg) \
295 static JNIHistogramElement* e = new JNIHistogramElement(arg); \
296 /* There is a MT-race condition in VC++. So we need to make sure that that e has been initialized */ \
297 if (e != NULL) e->increment_count()
298 #define JNIWrapper(arg) JNICountWrapper(arg);
299 #else
300 #define JNIWrapper(arg)
301 #endif
302
303
304 // Implementation of JNI entries
305
306 DT_RETURN_MARK_DECL(DefineClass, jclass
307 , HOTSPOT_JNI_DEFINECLASS_RETURN(_ret_ref));
308
309 JNI_ENTRY(jclass, jni_DefineClass(JNIEnv *env, const char *name, jobject loaderRef,
310 const jbyte *buf, jsize bufLen))
311 JNIWrapper("DefineClass");
312
313 HOTSPOT_JNI_DEFINECLASS_ENTRY(
314 env, (char*) name, loaderRef, (char*) buf, bufLen);
315
316 jclass cls = NULL;
317 DT_RETURN_MARK(DefineClass, jclass, (const jclass&)cls);
318
319 // Class resolution will get the class name from the .class stream if the name is null.
320 TempNewSymbol class_name = name == NULL ? NULL :
321 SystemDictionary::class_name_symbol(name, vmSymbols::java_lang_NoClassDefFoundError(),
322 CHECK_NULL);
323
324 ResourceMark rm(THREAD);
325 ClassFileStream st((u1*)buf, bufLen, NULL, ClassFileStream::verify);
326 Handle class_loader (THREAD, JNIHandles::resolve(loaderRef));
327
328 if (UsePerfData && !class_loader.is_null()) {
329 // check whether the current caller thread holds the lock or not.
330 // If not, increment the corresponding counter
331 if (ObjectSynchronizer::
332 query_lock_ownership((JavaThread*)THREAD, class_loader) !=
333 ObjectSynchronizer::owner_self) {
334 ClassLoader::sync_JNIDefineClassLockFreeCounter()->inc();
335 }
336 }
337 Klass* k = SystemDictionary::resolve_from_stream(class_name,
338 class_loader,
339 Handle(),
340 &st,
341 CHECK_NULL);
342
343 if (log_is_enabled(Debug, class, resolve) && k != NULL) {
344 trace_class_resolution(k);
345 }
346
347 cls = (jclass)JNIHandles::make_local(THREAD, k->java_mirror());
348 return cls;
349 JNI_END
350
351
352
353 DT_RETURN_MARK_DECL(FindClass, jclass
354 , HOTSPOT_JNI_FINDCLASS_RETURN(_ret_ref));
355
356 JNI_ENTRY(jclass, jni_FindClass(JNIEnv *env, const char *name))
357 JNIWrapper("FindClass");
358
359 HOTSPOT_JNI_FINDCLASS_ENTRY(env, (char *)name);
360
361 jclass result = NULL;
362 DT_RETURN_MARK(FindClass, jclass, (const jclass&)result);
363
364 // This should be ClassNotFoundException imo.
365 TempNewSymbol class_name =
366 SystemDictionary::class_name_symbol(name, vmSymbols::java_lang_NoClassDefFoundError(),
367 CHECK_NULL);
368
369 //%note jni_3
370 Handle protection_domain;
371 // Find calling class
372 Klass* k = thread->security_get_caller_class(0);
373 // default to the system loader when no context
374 Handle loader(THREAD, SystemDictionary::java_system_loader());
375 if (k != NULL) {
376 // Special handling to make sure JNI_OnLoad and JNI_OnUnload are executed
377 // in the correct class context.
378 if (k->class_loader() == NULL &&
379 k->name() == vmSymbols::jdk_internal_loader_NativeLibraries()) {
380 JavaValue result(T_OBJECT);
381 JavaCalls::call_static(&result, k,
382 vmSymbols::getFromClass_name(),
383 vmSymbols::void_class_signature(),
384 CHECK_NULL);
385 // When invoked from JNI_OnLoad, NativeLibraries::getFromClass returns
386 // a non-NULL Class object. When invoked from JNI_OnUnload,
387 // it will return NULL to indicate no context.
388 oop mirror = (oop) result.get_jobject();
389 if (mirror != NULL) {
390 Klass* fromClass = java_lang_Class::as_Klass(mirror);
391 loader = Handle(THREAD, fromClass->class_loader());
392 protection_domain = Handle(THREAD, fromClass->protection_domain());
393 }
394 } else {
395 loader = Handle(THREAD, k->class_loader());
396 }
397 }
398
399 result = find_class_from_class_loader(env, class_name, true, loader,
400 protection_domain, true, thread);
401
402 if (log_is_enabled(Debug, class, resolve) && result != NULL) {
403 trace_class_resolution(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(result)));
404 }
405
406 return result;
407 JNI_END
408
409 DT_RETURN_MARK_DECL(FromReflectedMethod, jmethodID
410 , HOTSPOT_JNI_FROMREFLECTEDMETHOD_RETURN((uintptr_t)_ret_ref));
411
412 JNI_ENTRY(jmethodID, jni_FromReflectedMethod(JNIEnv *env, jobject method))
413 JNIWrapper("FromReflectedMethod");
414
415 HOTSPOT_JNI_FROMREFLECTEDMETHOD_ENTRY(env, method);
416
417 jmethodID ret = NULL;
418 DT_RETURN_MARK(FromReflectedMethod, jmethodID, (const jmethodID&)ret);
419
420 // method is a handle to a java.lang.reflect.Method object
421 oop reflected = JNIHandles::resolve_non_null(method);
422 oop mirror = NULL;
423 int slot = 0;
424
425 if (reflected->klass() == SystemDictionary::reflect_Constructor_klass()) {
426 mirror = java_lang_reflect_Constructor::clazz(reflected);
427 slot = java_lang_reflect_Constructor::slot(reflected);
428 } else {
429 assert(reflected->klass() == SystemDictionary::reflect_Method_klass(), "wrong type");
430 mirror = java_lang_reflect_Method::clazz(reflected);
431 slot = java_lang_reflect_Method::slot(reflected);
432 }
433 Klass* k1 = java_lang_Class::as_Klass(mirror);
434
435 // Make sure class is initialized before handing id's out to methods
436 k1->initialize(CHECK_NULL);
437 Method* m = InstanceKlass::cast(k1)->method_with_idnum(slot);
438 ret = m==NULL? NULL : m->jmethod_id(); // return NULL if reflected method deleted
439 return ret;
440 JNI_END
441
442 DT_RETURN_MARK_DECL(FromReflectedField, jfieldID
443 , HOTSPOT_JNI_FROMREFLECTEDFIELD_RETURN((uintptr_t)_ret_ref));
444
445 JNI_ENTRY(jfieldID, jni_FromReflectedField(JNIEnv *env, jobject field))
446 JNIWrapper("FromReflectedField");
447
448 HOTSPOT_JNI_FROMREFLECTEDFIELD_ENTRY(env, field);
449
450 jfieldID ret = NULL;
451 DT_RETURN_MARK(FromReflectedField, jfieldID, (const jfieldID&)ret);
452
453 // field is a handle to a java.lang.reflect.Field object
454 oop reflected = JNIHandles::resolve_non_null(field);
455 oop mirror = java_lang_reflect_Field::clazz(reflected);
456 Klass* k1 = java_lang_Class::as_Klass(mirror);
457 int slot = java_lang_reflect_Field::slot(reflected);
458 int modifiers = java_lang_reflect_Field::modifiers(reflected);
459
460 // Make sure class is initialized before handing id's out to fields
461 k1->initialize(CHECK_NULL);
462
463 // First check if this is a static field
464 if (modifiers & JVM_ACC_STATIC) {
465 intptr_t offset = InstanceKlass::cast(k1)->field_offset( slot );
466 JNIid* id = InstanceKlass::cast(k1)->jni_id_for(offset);
467 assert(id != NULL, "corrupt Field object");
468 debug_only(id->set_is_static_field_id();)
469 // A jfieldID for a static field is a JNIid specifying the field holder and the offset within the Klass*
470 ret = jfieldIDWorkaround::to_static_jfieldID(id);
471 return ret;
472 }
473
474 // The slot is the index of the field description in the field-array
475 // The jfieldID is the offset of the field within the object
476 // It may also have hash bits for k, if VerifyJNIFields is turned on.
477 intptr_t offset = InstanceKlass::cast(k1)->field_offset( slot );
478 assert(InstanceKlass::cast(k1)->contains_field_offset(offset), "stay within object");
479 ret = jfieldIDWorkaround::to_instance_jfieldID(k1, offset);
480 return ret;
481 JNI_END
482
483
484 DT_RETURN_MARK_DECL(ToReflectedMethod, jobject
485 , HOTSPOT_JNI_TOREFLECTEDMETHOD_RETURN(_ret_ref));
486
487 JNI_ENTRY(jobject, jni_ToReflectedMethod(JNIEnv *env, jclass cls, jmethodID method_id, jboolean isStatic))
488 JNIWrapper("ToReflectedMethod");
489
490 HOTSPOT_JNI_TOREFLECTEDMETHOD_ENTRY(env, cls, (uintptr_t) method_id, isStatic);
491
492 jobject ret = NULL;
493 DT_RETURN_MARK(ToReflectedMethod, jobject, (const jobject&)ret);
494
495 methodHandle m (THREAD, Method::resolve_jmethod_id(method_id));
496 assert(m->is_static() == (isStatic != 0), "jni_ToReflectedMethod access flags doesn't match");
497 oop reflection_method;
498 if (m->is_initializer()) {
499 reflection_method = Reflection::new_constructor(m, CHECK_NULL);
500 } else {
501 reflection_method = Reflection::new_method(m, false, CHECK_NULL);
502 }
503 ret = JNIHandles::make_local(THREAD, reflection_method);
504 return ret;
505 JNI_END
506
507 DT_RETURN_MARK_DECL(GetSuperclass, jclass
508 , HOTSPOT_JNI_GETSUPERCLASS_RETURN(_ret_ref));
509
510 JNI_ENTRY(jclass, jni_GetSuperclass(JNIEnv *env, jclass sub))
511 JNIWrapper("GetSuperclass");
512
513 HOTSPOT_JNI_GETSUPERCLASS_ENTRY(env, sub);
514
515 jclass obj = NULL;
516 DT_RETURN_MARK(GetSuperclass, jclass, (const jclass&)obj);
517
518 oop mirror = JNIHandles::resolve_non_null(sub);
519 // primitive classes return NULL
520 if (java_lang_Class::is_primitive(mirror)) return NULL;
521
522 // Rules of Class.getSuperClass as implemented by KLass::java_super:
523 // arrays return Object
524 // interfaces return NULL
525 // proper classes return Klass::super()
526 Klass* k = java_lang_Class::as_Klass(mirror);
527 if (k->is_interface()) return NULL;
528
529 // return mirror for superclass
530 Klass* super = k->java_super();
531 // super2 is the value computed by the compiler's getSuperClass intrinsic:
532 debug_only(Klass* super2 = ( k->is_array_klass()
533 ? SystemDictionary::Object_klass()
534 : k->super() ) );
535 assert(super == super2,
536 "java_super computation depends on interface, array, other super");
537 obj = (super == NULL) ? NULL : (jclass) JNIHandles::make_local(THREAD, super->java_mirror());
538 return obj;
539 JNI_END
540
541 JNI_ENTRY_NO_PRESERVE(jboolean, jni_IsAssignableFrom(JNIEnv *env, jclass sub, jclass super))
542 JNIWrapper("IsSubclassOf");
543
544 HOTSPOT_JNI_ISASSIGNABLEFROM_ENTRY(env, sub, super);
545
546 oop sub_mirror = JNIHandles::resolve_non_null(sub);
547 oop super_mirror = JNIHandles::resolve_non_null(super);
548 if (java_lang_Class::is_primitive(sub_mirror) ||
549 java_lang_Class::is_primitive(super_mirror)) {
550 jboolean ret = (sub_mirror == super_mirror);
551
552 HOTSPOT_JNI_ISASSIGNABLEFROM_RETURN(ret);
553 return ret;
554 }
555 Klass* sub_klass = java_lang_Class::as_Klass(sub_mirror);
556 Klass* super_klass = java_lang_Class::as_Klass(super_mirror);
557 assert(sub_klass != NULL && super_klass != NULL, "invalid arguments to jni_IsAssignableFrom");
558 jboolean ret = sub_klass->is_subtype_of(super_klass) ?
559 JNI_TRUE : JNI_FALSE;
560
561 HOTSPOT_JNI_ISASSIGNABLEFROM_RETURN(ret);
562 return ret;
563 JNI_END
564
565
566 DT_RETURN_MARK_DECL(Throw, jint
567 , HOTSPOT_JNI_THROW_RETURN(_ret_ref));
568
569 JNI_ENTRY(jint, jni_Throw(JNIEnv *env, jthrowable obj))
570 JNIWrapper("Throw");
571
572 HOTSPOT_JNI_THROW_ENTRY(env, obj);
573
574 jint ret = JNI_OK;
575 DT_RETURN_MARK(Throw, jint, (const jint&)ret);
576
577 THROW_OOP_(JNIHandles::resolve(obj), JNI_OK);
578 ShouldNotReachHere();
579 return 0; // Mute compiler.
580 JNI_END
581
582
583 DT_RETURN_MARK_DECL(ThrowNew, jint
584 , HOTSPOT_JNI_THROWNEW_RETURN(_ret_ref));
585
586 JNI_ENTRY(jint, jni_ThrowNew(JNIEnv *env, jclass clazz, const char *message))
587 JNIWrapper("ThrowNew");
588
589 HOTSPOT_JNI_THROWNEW_ENTRY(env, clazz, (char *) message);
590
591 jint ret = JNI_OK;
592 DT_RETURN_MARK(ThrowNew, jint, (const jint&)ret);
593
594 InstanceKlass* k = InstanceKlass::cast(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz)));
595 Symbol* name = k->name();
596 Handle class_loader (THREAD, k->class_loader());
597 Handle protection_domain (THREAD, k->protection_domain());
598 THROW_MSG_LOADER_(name, (char *)message, class_loader, protection_domain, JNI_OK);
599 ShouldNotReachHere();
600 return 0; // Mute compiler.
601 JNI_END
602
603
604 // JNI functions only transform a pending async exception to a synchronous
605 // exception in ExceptionOccurred and ExceptionCheck calls, since
606 // delivering an async exception in other places won't change the native
607 // code's control flow and would be harmful when native code further calls
608 // JNI functions with a pending exception. Async exception is also checked
609 // during the call, so ExceptionOccurred/ExceptionCheck won't return
610 // false but deliver the async exception at the very end during
611 // state transition.
612
613 static void jni_check_async_exceptions(JavaThread *thread) {
614 assert(thread == Thread::current(), "must be itself");
615 thread->check_and_handle_async_exceptions();
616 }
617
618 JNI_ENTRY_NO_PRESERVE(jthrowable, jni_ExceptionOccurred(JNIEnv *env))
619 JNIWrapper("ExceptionOccurred");
620
621 HOTSPOT_JNI_EXCEPTIONOCCURRED_ENTRY(env);
622
623 jni_check_async_exceptions(thread);
624 oop exception = thread->pending_exception();
625 jthrowable ret = (jthrowable) JNIHandles::make_local(THREAD, exception);
626
627 HOTSPOT_JNI_EXCEPTIONOCCURRED_RETURN(ret);
628 return ret;
629 JNI_END
630
631
632 JNI_ENTRY_NO_PRESERVE(void, jni_ExceptionDescribe(JNIEnv *env))
633 JNIWrapper("ExceptionDescribe");
634
635 HOTSPOT_JNI_EXCEPTIONDESCRIBE_ENTRY(env);
636
637 if (thread->has_pending_exception()) {
638 Handle ex(thread, thread->pending_exception());
639 thread->clear_pending_exception();
640 if (ex->is_a(SystemDictionary::ThreadDeath_klass())) {
641 // Don't print anything if we are being killed.
642 } else {
643 jio_fprintf(defaultStream::error_stream(), "Exception ");
644 if (thread != NULL && thread->threadObj() != NULL) {
645 ResourceMark rm(THREAD);
646 jio_fprintf(defaultStream::error_stream(),
647 "in thread \"%s\" ", thread->get_thread_name());
648 }
649 if (ex->is_a(SystemDictionary::Throwable_klass())) {
650 JavaValue result(T_VOID);
651 JavaCalls::call_virtual(&result,
652 ex,
653 SystemDictionary::Throwable_klass(),
654 vmSymbols::printStackTrace_name(),
655 vmSymbols::void_method_signature(),
656 THREAD);
657 // If an exception is thrown in the call it gets thrown away. Not much
658 // we can do with it. The native code that calls this, does not check
659 // for the exception - hence, it might still be in the thread when DestroyVM gets
660 // called, potentially causing a few asserts to trigger - since no pending exception
661 // is expected.
662 CLEAR_PENDING_EXCEPTION;
663 } else {
664 ResourceMark rm(THREAD);
665 jio_fprintf(defaultStream::error_stream(),
666 ". Uncaught exception of type %s.",
667 ex->klass()->external_name());
668 }
669 }
670 }
671
672 HOTSPOT_JNI_EXCEPTIONDESCRIBE_RETURN();
673 JNI_END
674
675
676 JNI_ENTRY_NO_PRESERVE(void, jni_ExceptionClear(JNIEnv *env))
677 JNIWrapper("ExceptionClear");
678
679 HOTSPOT_JNI_EXCEPTIONCLEAR_ENTRY(env);
680
681 // The jni code might be using this API to clear java thrown exception.
682 // So just mark jvmti thread exception state as exception caught.
683 JvmtiThreadState *state = JavaThread::current()->jvmti_thread_state();
684 if (state != NULL && state->is_exception_detected()) {
685 state->set_exception_caught();
686 }
687 thread->clear_pending_exception();
688
689 HOTSPOT_JNI_EXCEPTIONCLEAR_RETURN();
690 JNI_END
691
692
693 JNI_ENTRY(void, jni_FatalError(JNIEnv *env, const char *msg))
694 JNIWrapper("FatalError");
695
696 HOTSPOT_JNI_FATALERROR_ENTRY(env, (char *) msg);
697
698 tty->print_cr("FATAL ERROR in native method: %s", msg);
699 thread->print_stack();
700 os::abort(); // Dump core and abort
701 JNI_END
702
703
704 JNI_ENTRY(jint, jni_PushLocalFrame(JNIEnv *env, jint capacity))
705 JNIWrapper("PushLocalFrame");
706
707 HOTSPOT_JNI_PUSHLOCALFRAME_ENTRY(env, capacity);
708
709 //%note jni_11
710 if (capacity < 0 ||
711 ((MaxJNILocalCapacity > 0) && (capacity > MaxJNILocalCapacity))) {
712 HOTSPOT_JNI_PUSHLOCALFRAME_RETURN((uint32_t)JNI_ERR);
713 return JNI_ERR;
714 }
715 JNIHandleBlock* old_handles = thread->active_handles();
716 JNIHandleBlock* new_handles = JNIHandleBlock::allocate_block(thread);
717 assert(new_handles != NULL, "should not be NULL");
718 new_handles->set_pop_frame_link(old_handles);
719 thread->set_active_handles(new_handles);
720 jint ret = JNI_OK;
721 HOTSPOT_JNI_PUSHLOCALFRAME_RETURN(ret);
722 return ret;
723 JNI_END
724
725
726 JNI_ENTRY(jobject, jni_PopLocalFrame(JNIEnv *env, jobject result))
727 JNIWrapper("PopLocalFrame");
728
729 HOTSPOT_JNI_POPLOCALFRAME_ENTRY(env, result);
730
731 //%note jni_11
732 Handle result_handle(thread, JNIHandles::resolve(result));
733 JNIHandleBlock* old_handles = thread->active_handles();
734 JNIHandleBlock* new_handles = old_handles->pop_frame_link();
735 if (new_handles != NULL) {
736 // As a sanity check we only release the handle blocks if the pop_frame_link is not NULL.
737 // This way code will still work if PopLocalFrame is called without a corresponding
738 // PushLocalFrame call. Note that we set the pop_frame_link to NULL explicitly, otherwise
739 // the release_block call will release the blocks.
740 thread->set_active_handles(new_handles);
741 old_handles->set_pop_frame_link(NULL); // clear link we won't release new_handles below
742 JNIHandleBlock::release_block(old_handles, thread); // may block
743 result = JNIHandles::make_local(thread, result_handle());
744 }
745 HOTSPOT_JNI_POPLOCALFRAME_RETURN(result);
746 return result;
747 JNI_END
748
749
750 JNI_ENTRY(jobject, jni_NewGlobalRef(JNIEnv *env, jobject ref))
751 JNIWrapper("NewGlobalRef");
752
753 HOTSPOT_JNI_NEWGLOBALREF_ENTRY(env, ref);
754
755 Handle ref_handle(thread, JNIHandles::resolve(ref));
756 jobject ret = JNIHandles::make_global(ref_handle, AllocFailStrategy::RETURN_NULL);
757
758 HOTSPOT_JNI_NEWGLOBALREF_RETURN(ret);
759 return ret;
760 JNI_END
761
762 // Must be JNI_ENTRY (with HandleMark)
763 JNI_ENTRY_NO_PRESERVE(void, jni_DeleteGlobalRef(JNIEnv *env, jobject ref))
764 JNIWrapper("DeleteGlobalRef");
765
766 HOTSPOT_JNI_DELETEGLOBALREF_ENTRY(env, ref);
767
768 JNIHandles::destroy_global(ref);
769
770 HOTSPOT_JNI_DELETEGLOBALREF_RETURN();
771 JNI_END
772
773 JNI_ENTRY_NO_PRESERVE(void, jni_DeleteLocalRef(JNIEnv *env, jobject obj))
774 JNIWrapper("DeleteLocalRef");
775
776 HOTSPOT_JNI_DELETELOCALREF_ENTRY(env, obj);
777
778 JNIHandles::destroy_local(obj);
779
780 HOTSPOT_JNI_DELETELOCALREF_RETURN();
781 JNI_END
782
783 JNI_ENTRY_NO_PRESERVE(jboolean, jni_IsSameObject(JNIEnv *env, jobject r1, jobject r2))
784 JNIWrapper("IsSameObject");
785
786 HOTSPOT_JNI_ISSAMEOBJECT_ENTRY(env, r1, r2);
787
788 jboolean ret = JNIHandles::is_same_object(r1, r2) ? JNI_TRUE : JNI_FALSE;
789
790 HOTSPOT_JNI_ISSAMEOBJECT_RETURN(ret);
791 return ret;
792 JNI_END
793
794
795 JNI_ENTRY(jobject, jni_NewLocalRef(JNIEnv *env, jobject ref))
796 JNIWrapper("NewLocalRef");
797
798 HOTSPOT_JNI_NEWLOCALREF_ENTRY(env, ref);
799
800 jobject ret = JNIHandles::make_local(THREAD, JNIHandles::resolve(ref),
801 AllocFailStrategy::RETURN_NULL);
802
803 HOTSPOT_JNI_NEWLOCALREF_RETURN(ret);
804 return ret;
805 JNI_END
806
807 JNI_LEAF(jint, jni_EnsureLocalCapacity(JNIEnv *env, jint capacity))
808 JNIWrapper("EnsureLocalCapacity");
809
810 HOTSPOT_JNI_ENSURELOCALCAPACITY_ENTRY(env, capacity);
811
812 jint ret;
813 if (capacity >= 0 &&
814 ((MaxJNILocalCapacity <= 0) || (capacity <= MaxJNILocalCapacity))) {
815 ret = JNI_OK;
816 } else {
817 ret = JNI_ERR;
818 }
819
820 HOTSPOT_JNI_ENSURELOCALCAPACITY_RETURN(ret);
821 return ret;
822 JNI_END
823
824 // Return the Handle Type
825 JNI_LEAF(jobjectRefType, jni_GetObjectRefType(JNIEnv *env, jobject obj))
826 JNIWrapper("GetObjectRefType");
827
828 HOTSPOT_JNI_GETOBJECTREFTYPE_ENTRY(env, obj);
829
830 jobjectRefType ret = JNIInvalidRefType;
831 if (obj != NULL) {
832 ret = JNIHandles::handle_type(thread, obj);
833 }
834
835 HOTSPOT_JNI_GETOBJECTREFTYPE_RETURN((void *) ret);
836 return ret;
837 JNI_END
838
839
840 class JNI_ArgumentPusher : public SignatureIterator {
841 protected:
842 JavaCallArguments* _arguments;
843
844 void push_int(jint x) { _arguments->push_int(x); }
845 void push_long(jlong x) { _arguments->push_long(x); }
846 void push_float(jfloat x) { _arguments->push_float(x); }
847 void push_double(jdouble x) { _arguments->push_double(x); }
848 void push_object(jobject x) { _arguments->push_jobject(x); }
849
850 void push_boolean(jboolean b) {
851 // Normalize boolean arguments from native code by converting 1-255 to JNI_TRUE and
852 // 0 to JNI_FALSE. Boolean return values from native are normalized the same in
853 // TemplateInterpreterGenerator::generate_result_handler_for and
854 // SharedRuntime::generate_native_wrapper.
855 push_int(b == 0 ? JNI_FALSE : JNI_TRUE);
856 }
857
858 JNI_ArgumentPusher(Method* method)
859 : SignatureIterator(method->signature(),
860 Fingerprinter(methodHandle(Thread::current(), method)).fingerprint())
861 {
862 _arguments = NULL;
863 }
864
865 public:
866 virtual void push_arguments_on(JavaCallArguments* arguments) = 0;
867 };
868
869
870 class JNI_ArgumentPusherVaArg : public JNI_ArgumentPusher {
871 protected:
872 va_list _ap;
873
874 void set_ap(va_list rap) {
875 va_copy(_ap, rap);
876 }
877
878 friend class SignatureIterator; // so do_parameters_on can call do_type
879 void do_type(BasicType type) {
880 switch (type) {
881 // these are coerced to int when using va_arg
882 case T_BYTE:
883 case T_CHAR:
884 case T_SHORT:
885 case T_INT: push_int(va_arg(_ap, jint)); break;
886 case T_BOOLEAN: push_boolean((jboolean) va_arg(_ap, jint)); break;
887
888 // each of these paths is exercised by the various jck Call[Static,Nonvirtual,][Void,Int,..]Method[A,V,] tests
889
890 case T_LONG: push_long(va_arg(_ap, jlong)); break;
891 // float is coerced to double w/ va_arg
892 case T_FLOAT: push_float((jfloat) va_arg(_ap, jdouble)); break;
893 case T_DOUBLE: push_double(va_arg(_ap, jdouble)); break;
894
895 case T_ARRAY:
896 case T_OBJECT: push_object(va_arg(_ap, jobject)); break;
897 default: ShouldNotReachHere();
898 }
899 }
900
901 public:
902 JNI_ArgumentPusherVaArg(jmethodID method_id, va_list rap)
903 : JNI_ArgumentPusher(Method::resolve_jmethod_id(method_id)) {
904 set_ap(rap);
905 }
906
907 virtual void push_arguments_on(JavaCallArguments* arguments) {
908 _arguments = arguments;
909 do_parameters_on(this);
910 }
911 };
912
913
914 class JNI_ArgumentPusherArray : public JNI_ArgumentPusher {
915 protected:
916 const jvalue *_ap;
917
918 inline void set_ap(const jvalue *rap) { _ap = rap; }
919
920 friend class SignatureIterator; // so do_parameters_on can call do_type
921 void do_type(BasicType type) {
922 switch (type) {
923 case T_CHAR: push_int((_ap++)->c); break;
924 case T_SHORT: push_int((_ap++)->s); break;
925 case T_BYTE: push_int((_ap++)->b); break;
926 case T_INT: push_int((_ap++)->i); break;
927 case T_BOOLEAN: push_boolean((_ap++)->z); break;
928 case T_LONG: push_long((_ap++)->j); break;
929 case T_FLOAT: push_float((_ap++)->f); break;
930 case T_DOUBLE: push_double((_ap++)->d); break;
931 case T_ARRAY:
932 case T_OBJECT: push_object((_ap++)->l); break;
933 default: ShouldNotReachHere();
934 }
935 }
936
937 public:
938 JNI_ArgumentPusherArray(jmethodID method_id, const jvalue *rap)
939 : JNI_ArgumentPusher(Method::resolve_jmethod_id(method_id)) {
940 set_ap(rap);
941 }
942
943 virtual void push_arguments_on(JavaCallArguments* arguments) {
944 _arguments = arguments;
945 do_parameters_on(this);
946 }
947 };
948
949
950 enum JNICallType {
951 JNI_STATIC,
952 JNI_VIRTUAL,
953 JNI_NONVIRTUAL
954 };
955
956
957
958 static void jni_invoke_static(JNIEnv *env, JavaValue* result, jobject receiver, JNICallType call_type, jmethodID method_id, JNI_ArgumentPusher *args, TRAPS) {
959 methodHandle method(THREAD, Method::resolve_jmethod_id(method_id));
960
961 // Create object to hold arguments for the JavaCall, and associate it with
962 // the jni parser
963 ResourceMark rm(THREAD);
964 int number_of_parameters = method->size_of_parameters();
965 JavaCallArguments java_args(number_of_parameters);
966
967 assert(method->is_static(), "method should be static");
968
969 // Fill out JavaCallArguments object
970 args->push_arguments_on(&java_args);
971 // Initialize result type
972 result->set_type(args->return_type());
973
974 // Invoke the method. Result is returned as oop.
975 JavaCalls::call(result, method, &java_args, CHECK);
976
977 // Convert result
978 if (is_reference_type(result->get_type())) {
979 result->set_jobject(JNIHandles::make_local(THREAD, (oop) result->get_jobject()));
980 }
981 }
982
983
984 static void jni_invoke_nonstatic(JNIEnv *env, JavaValue* result, jobject receiver, JNICallType call_type, jmethodID method_id, JNI_ArgumentPusher *args, TRAPS) {
985 oop recv = JNIHandles::resolve(receiver);
986 if (recv == NULL) {
987 THROW(vmSymbols::java_lang_NullPointerException());
988 }
989 Handle h_recv(THREAD, recv);
990
991 int number_of_parameters;
992 Method* selected_method;
993 {
994 Method* m = Method::resolve_jmethod_id(method_id);
995 number_of_parameters = m->size_of_parameters();
996 Klass* holder = m->method_holder();
997 if (call_type != JNI_VIRTUAL) {
998 selected_method = m;
999 } else if (!m->has_itable_index()) {
1000 // non-interface call -- for that little speed boost, don't handlize
1001 debug_only(NoSafepointVerifier nosafepoint;)
1002 // jni_GetMethodID makes sure class is linked and initialized
1003 // so m should have a valid vtable index.
1004 assert(m->valid_vtable_index(), "no valid vtable index");
1005 int vtbl_index = m->vtable_index();
1006 if (vtbl_index != Method::nonvirtual_vtable_index) {
1007 selected_method = h_recv->klass()->method_at_vtable(vtbl_index);
1008 } else {
1009 // final method
1010 selected_method = m;
1011 }
1012 } else {
1013 // interface call
1014 int itbl_index = m->itable_index();
1015 Klass* k = h_recv->klass();
1016 selected_method = InstanceKlass::cast(k)->method_at_itable(holder, itbl_index, CHECK);
1017 }
1018 }
1019
1020 methodHandle method(THREAD, selected_method);
1021
1022 // Create object to hold arguments for the JavaCall, and associate it with
1023 // the jni parser
1024 ResourceMark rm(THREAD);
1025 JavaCallArguments java_args(number_of_parameters);
1026
1027 // handle arguments
1028 assert(!method->is_static(), "method %s should not be static", method->name_and_sig_as_C_string());
1029 java_args.push_oop(h_recv); // Push jobject handle
1030
1031 // Fill out JavaCallArguments object
1032 args->push_arguments_on(&java_args);
1033 // Initialize result type
1034 result->set_type(args->return_type());
1035
1036 // Invoke the method. Result is returned as oop.
1037 JavaCalls::call(result, method, &java_args, CHECK);
1038
1039 // Convert result
1040 if (is_reference_type(result->get_type())) {
1041 result->set_jobject(JNIHandles::make_local(THREAD, (oop) result->get_jobject()));
1042 }
1043 }
1044
1045 DT_RETURN_MARK_DECL(AllocObject, jobject
1046 , HOTSPOT_JNI_ALLOCOBJECT_RETURN(_ret_ref));
1047
1048 JNI_ENTRY(jobject, jni_AllocObject(JNIEnv *env, jclass clazz))
1049 JNIWrapper("AllocObject");
1050
1051 HOTSPOT_JNI_ALLOCOBJECT_ENTRY(env, clazz);
1052
1053 jobject ret = NULL;
1054 DT_RETURN_MARK(AllocObject, jobject, (const jobject&)ret);
1055
1056 instanceOop i = InstanceKlass::allocate_instance(JNIHandles::resolve_non_null(clazz), CHECK_NULL);
1057 ret = JNIHandles::make_local(THREAD, i);
1058 return ret;
1059 JNI_END
1060
1061 DT_RETURN_MARK_DECL(NewObjectA, jobject
1062 , HOTSPOT_JNI_NEWOBJECTA_RETURN(_ret_ref));
1063
1064 JNI_ENTRY(jobject, jni_NewObjectA(JNIEnv *env, jclass clazz, jmethodID methodID, const jvalue *args))
1065 JNIWrapper("NewObjectA");
1066
1067 HOTSPOT_JNI_NEWOBJECTA_ENTRY(env, clazz, (uintptr_t) methodID);
1068
1069 jobject obj = NULL;
1070 DT_RETURN_MARK(NewObjectA, jobject, (const jobject)obj);
1071
1072 instanceOop i = InstanceKlass::allocate_instance(JNIHandles::resolve_non_null(clazz), CHECK_NULL);
1073 obj = JNIHandles::make_local(THREAD, i);
1074 JavaValue jvalue(T_VOID);
1075 JNI_ArgumentPusherArray ap(methodID, args);
1076 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_NULL);
1077 return obj;
1078 JNI_END
1079
1080
1081 DT_RETURN_MARK_DECL(NewObjectV, jobject
1082 , HOTSPOT_JNI_NEWOBJECTV_RETURN(_ret_ref));
1083
1084 JNI_ENTRY(jobject, jni_NewObjectV(JNIEnv *env, jclass clazz, jmethodID methodID, va_list args))
1085 JNIWrapper("NewObjectV");
1086
1087 HOTSPOT_JNI_NEWOBJECTV_ENTRY(env, clazz, (uintptr_t) methodID);
1088
1089 jobject obj = NULL;
1090 DT_RETURN_MARK(NewObjectV, jobject, (const jobject&)obj);
1091
1092 instanceOop i = InstanceKlass::allocate_instance(JNIHandles::resolve_non_null(clazz), CHECK_NULL);
1093 obj = JNIHandles::make_local(THREAD, i);
1094 JavaValue jvalue(T_VOID);
1095 JNI_ArgumentPusherVaArg ap(methodID, args);
1096 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_NULL);
1097 return obj;
1098 JNI_END
1099
1100
1101 DT_RETURN_MARK_DECL(NewObject, jobject
1102 , HOTSPOT_JNI_NEWOBJECT_RETURN(_ret_ref));
1103
1104 JNI_ENTRY(jobject, jni_NewObject(JNIEnv *env, jclass clazz, jmethodID methodID, ...))
1105 JNIWrapper("NewObject");
1106
1107 HOTSPOT_JNI_NEWOBJECT_ENTRY(env, clazz, (uintptr_t) methodID);
1108
1109 jobject obj = NULL;
1110 DT_RETURN_MARK(NewObject, jobject, (const jobject&)obj);
1111
1112 instanceOop i = InstanceKlass::allocate_instance(JNIHandles::resolve_non_null(clazz), CHECK_NULL);
1113 obj = JNIHandles::make_local(THREAD, i);
1114 va_list args;
1115 va_start(args, methodID);
1116 JavaValue jvalue(T_VOID);
1117 JNI_ArgumentPusherVaArg ap(methodID, args);
1118 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_NULL);
1119 va_end(args);
1120 return obj;
1121 JNI_END
1122
1123
1124 JNI_ENTRY(jclass, jni_GetObjectClass(JNIEnv *env, jobject obj))
1125 JNIWrapper("GetObjectClass");
1126
1127 HOTSPOT_JNI_GETOBJECTCLASS_ENTRY(env, obj);
1128
1129 Klass* k = JNIHandles::resolve_non_null(obj)->klass();
1130 jclass ret =
1131 (jclass) JNIHandles::make_local(THREAD, k->java_mirror());
1132
1133 HOTSPOT_JNI_GETOBJECTCLASS_RETURN(ret);
1134 return ret;
1135 JNI_END
1136
1137 JNI_ENTRY_NO_PRESERVE(jboolean, jni_IsInstanceOf(JNIEnv *env, jobject obj, jclass clazz))
1138 JNIWrapper("IsInstanceOf");
1139
1140 HOTSPOT_JNI_ISINSTANCEOF_ENTRY(env, obj, clazz);
1141
1142 jboolean ret = JNI_TRUE;
1143 if (obj != NULL) {
1144 ret = JNI_FALSE;
1145 Klass* k = java_lang_Class::as_Klass(
1146 JNIHandles::resolve_non_null(clazz));
1147 if (k != NULL) {
1148 ret = JNIHandles::resolve_non_null(obj)->is_a(k) ? JNI_TRUE : JNI_FALSE;
1149 }
1150 }
1151
1152 HOTSPOT_JNI_ISINSTANCEOF_RETURN(ret);
1153 return ret;
1154 JNI_END
1155
1156
1157 static jmethodID get_method_id(JNIEnv *env, jclass clazz, const char *name_str,
1158 const char *sig, bool is_static, TRAPS) {
1159 // %%%% This code should probably just call into a method in the LinkResolver
1160 //
1161 // The class should have been loaded (we have an instance of the class
1162 // passed in) so the method and signature should already be in the symbol
1163 // table. If they're not there, the method doesn't exist.
1164 const char *name_to_probe = (name_str == NULL)
1165 ? vmSymbols::object_initializer_name()->as_C_string()
1166 : name_str;
1167 TempNewSymbol name = SymbolTable::probe(name_to_probe, (int)strlen(name_to_probe));
1168 TempNewSymbol signature = SymbolTable::probe(sig, (int)strlen(sig));
1169
1170 if (name == NULL || signature == NULL) {
1171 THROW_MSG_0(vmSymbols::java_lang_NoSuchMethodError(), name_str);
1172 }
1173
1174 oop mirror = JNIHandles::resolve_non_null(clazz);
1175 Klass* klass = java_lang_Class::as_Klass(mirror);
1176
1177 // Throw a NoSuchMethodError exception if we have an instance of a
1178 // primitive java.lang.Class
1179 if (java_lang_Class::is_primitive(mirror)) {
1180 ResourceMark rm;
1181 THROW_MSG_0(vmSymbols::java_lang_NoSuchMethodError(), err_msg("%s%s.%s%s", is_static ? "static " : "", klass->signature_name(), name_str, sig));
1182 }
1183
1184 // Make sure class is linked and initialized before handing id's out to
1185 // Method*s.
1186 klass->initialize(CHECK_NULL);
1187
1188 Method* m;
1189 if (name == vmSymbols::object_initializer_name() ||
1190 name == vmSymbols::class_initializer_name()) {
1191 // Never search superclasses for constructors
1192 if (klass->is_instance_klass()) {
1193 m = InstanceKlass::cast(klass)->find_method(name, signature);
1194 } else {
1195 m = NULL;
1196 }
1197 } else {
1198 m = klass->lookup_method(name, signature);
1199 if (m == NULL && klass->is_instance_klass()) {
1200 m = InstanceKlass::cast(klass)->lookup_method_in_ordered_interfaces(name, signature);
1201 }
1202 }
1203 if (m == NULL || (m->is_static() != is_static)) {
1204 ResourceMark rm;
1205 THROW_MSG_0(vmSymbols::java_lang_NoSuchMethodError(), err_msg("%s%s.%s%s", is_static ? "static " : "", klass->signature_name(), name_str, sig));
1206 }
1207 return m->jmethod_id();
1208 }
1209
1210
1211 JNI_ENTRY(jmethodID, jni_GetMethodID(JNIEnv *env, jclass clazz,
1212 const char *name, const char *sig))
1213 JNIWrapper("GetMethodID");
1214 HOTSPOT_JNI_GETMETHODID_ENTRY(env, clazz, (char *) name, (char *) sig);
1215 jmethodID ret = get_method_id(env, clazz, name, sig, false, thread);
1216 HOTSPOT_JNI_GETMETHODID_RETURN((uintptr_t) ret);
1217 return ret;
1218 JNI_END
1219
1220
1221 JNI_ENTRY(jmethodID, jni_GetStaticMethodID(JNIEnv *env, jclass clazz,
1222 const char *name, const char *sig))
1223 JNIWrapper("GetStaticMethodID");
1224 HOTSPOT_JNI_GETSTATICMETHODID_ENTRY(env, (char *) clazz, (char *) name, (char *)sig);
1225 jmethodID ret = get_method_id(env, clazz, name, sig, true, thread);
1226 HOTSPOT_JNI_GETSTATICMETHODID_RETURN((uintptr_t) ret);
1227 return ret;
1228 JNI_END
1229
1230
1231
1232 //
1233 // Calling Methods
1234 //
1235
1236
1237 #define DEFINE_CALLMETHOD(ResultType, Result, Tag \
1238 , EntryProbe, ReturnProbe) \
1239 \
1240 DT_RETURN_MARK_DECL_FOR(Result, Call##Result##Method, ResultType \
1241 , ReturnProbe); \
1242 \
1243 JNI_ENTRY(ResultType, \
1244 jni_Call##Result##Method(JNIEnv *env, jobject obj, jmethodID methodID, ...)) \
1245 JNIWrapper("Call" XSTR(Result) "Method"); \
1246 \
1247 EntryProbe; \
1248 ResultType ret = 0;\
1249 DT_RETURN_MARK_FOR(Result, Call##Result##Method, ResultType, \
1250 (const ResultType&)ret);\
1251 \
1252 va_list args; \
1253 va_start(args, methodID); \
1254 JavaValue jvalue(Tag); \
1255 JNI_ArgumentPusherVaArg ap(methodID, args); \
1256 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK_0); \
1257 va_end(args); \
1258 ret = jvalue.get_##ResultType(); \
1259 return ret;\
1260 JNI_END
1261
1262 // the runtime type of subword integral basic types is integer
1263 DEFINE_CALLMETHOD(jboolean, Boolean, T_BOOLEAN
1264 , HOTSPOT_JNI_CALLBOOLEANMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1265 HOTSPOT_JNI_CALLBOOLEANMETHOD_RETURN(_ret_ref))
1266 DEFINE_CALLMETHOD(jbyte, Byte, T_BYTE
1267 , HOTSPOT_JNI_CALLBYTEMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1268 HOTSPOT_JNI_CALLBYTEMETHOD_RETURN(_ret_ref))
1269 DEFINE_CALLMETHOD(jchar, Char, T_CHAR
1270 , HOTSPOT_JNI_CALLCHARMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1271 HOTSPOT_JNI_CALLCHARMETHOD_RETURN(_ret_ref))
1272 DEFINE_CALLMETHOD(jshort, Short, T_SHORT
1273 , HOTSPOT_JNI_CALLSHORTMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1274 HOTSPOT_JNI_CALLSHORTMETHOD_RETURN(_ret_ref))
1275
1276 DEFINE_CALLMETHOD(jobject, Object, T_OBJECT
1277 , HOTSPOT_JNI_CALLOBJECTMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1278 HOTSPOT_JNI_CALLOBJECTMETHOD_RETURN(_ret_ref))
1279 DEFINE_CALLMETHOD(jint, Int, T_INT,
1280 HOTSPOT_JNI_CALLINTMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1281 HOTSPOT_JNI_CALLINTMETHOD_RETURN(_ret_ref))
1282 DEFINE_CALLMETHOD(jlong, Long, T_LONG
1283 , HOTSPOT_JNI_CALLLONGMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1284 HOTSPOT_JNI_CALLLONGMETHOD_RETURN(_ret_ref))
1285 // Float and double probes don't return value because dtrace doesn't currently support it
1286 DEFINE_CALLMETHOD(jfloat, Float, T_FLOAT
1287 , HOTSPOT_JNI_CALLFLOATMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1288 HOTSPOT_JNI_CALLFLOATMETHOD_RETURN())
1289 DEFINE_CALLMETHOD(jdouble, Double, T_DOUBLE
1290 , HOTSPOT_JNI_CALLDOUBLEMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1291 HOTSPOT_JNI_CALLDOUBLEMETHOD_RETURN())
1292
1293 #define DEFINE_CALLMETHODV(ResultType, Result, Tag \
1294 , EntryProbe, ReturnProbe) \
1295 \
1296 DT_RETURN_MARK_DECL_FOR(Result, Call##Result##MethodV, ResultType \
1297 , ReturnProbe); \
1298 \
1299 JNI_ENTRY(ResultType, \
1300 jni_Call##Result##MethodV(JNIEnv *env, jobject obj, jmethodID methodID, va_list args)) \
1301 JNIWrapper("Call" XSTR(Result) "MethodV"); \
1302 \
1303 EntryProbe;\
1304 ResultType ret = 0;\
1305 DT_RETURN_MARK_FOR(Result, Call##Result##MethodV, ResultType, \
1306 (const ResultType&)ret);\
1307 \
1308 JavaValue jvalue(Tag); \
1309 JNI_ArgumentPusherVaArg ap(methodID, args); \
1310 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK_0); \
1311 ret = jvalue.get_##ResultType(); \
1312 return ret;\
1313 JNI_END
1314
1315 // the runtime type of subword integral basic types is integer
1316 DEFINE_CALLMETHODV(jboolean, Boolean, T_BOOLEAN
1317 , HOTSPOT_JNI_CALLBOOLEANMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1318 HOTSPOT_JNI_CALLBOOLEANMETHODV_RETURN(_ret_ref))
1319 DEFINE_CALLMETHODV(jbyte, Byte, T_BYTE
1320 , HOTSPOT_JNI_CALLBYTEMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1321 HOTSPOT_JNI_CALLBYTEMETHODV_RETURN(_ret_ref))
1322 DEFINE_CALLMETHODV(jchar, Char, T_CHAR
1323 , HOTSPOT_JNI_CALLCHARMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1324 HOTSPOT_JNI_CALLCHARMETHODV_RETURN(_ret_ref))
1325 DEFINE_CALLMETHODV(jshort, Short, T_SHORT
1326 , HOTSPOT_JNI_CALLSHORTMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1327 HOTSPOT_JNI_CALLSHORTMETHODV_RETURN(_ret_ref))
1328
1329 DEFINE_CALLMETHODV(jobject, Object, T_OBJECT
1330 , HOTSPOT_JNI_CALLOBJECTMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1331 HOTSPOT_JNI_CALLOBJECTMETHODV_RETURN(_ret_ref))
1332 DEFINE_CALLMETHODV(jint, Int, T_INT,
1333 HOTSPOT_JNI_CALLINTMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1334 HOTSPOT_JNI_CALLINTMETHODV_RETURN(_ret_ref))
1335 DEFINE_CALLMETHODV(jlong, Long, T_LONG
1336 , HOTSPOT_JNI_CALLLONGMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1337 HOTSPOT_JNI_CALLLONGMETHODV_RETURN(_ret_ref))
1338 // Float and double probes don't return value because dtrace doesn't currently support it
1339 DEFINE_CALLMETHODV(jfloat, Float, T_FLOAT
1340 , HOTSPOT_JNI_CALLFLOATMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1341 HOTSPOT_JNI_CALLFLOATMETHODV_RETURN())
1342 DEFINE_CALLMETHODV(jdouble, Double, T_DOUBLE
1343 , HOTSPOT_JNI_CALLDOUBLEMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1344 HOTSPOT_JNI_CALLDOUBLEMETHODV_RETURN())
1345
1346 #define DEFINE_CALLMETHODA(ResultType, Result, Tag \
1347 , EntryProbe, ReturnProbe) \
1348 \
1349 DT_RETURN_MARK_DECL_FOR(Result, Call##Result##MethodA, ResultType \
1350 , ReturnProbe); \
1351 \
1352 JNI_ENTRY(ResultType, \
1353 jni_Call##Result##MethodA(JNIEnv *env, jobject obj, jmethodID methodID, const jvalue *args)) \
1354 JNIWrapper("Call" XSTR(Result) "MethodA"); \
1355 EntryProbe; \
1356 ResultType ret = 0;\
1357 DT_RETURN_MARK_FOR(Result, Call##Result##MethodA, ResultType, \
1358 (const ResultType&)ret);\
1359 \
1360 JavaValue jvalue(Tag); \
1361 JNI_ArgumentPusherArray ap(methodID, args); \
1362 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK_0); \
1363 ret = jvalue.get_##ResultType(); \
1364 return ret;\
1365 JNI_END
1366
1367 // the runtime type of subword integral basic types is integer
1368 DEFINE_CALLMETHODA(jboolean, Boolean, T_BOOLEAN
1369 , HOTSPOT_JNI_CALLBOOLEANMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1370 HOTSPOT_JNI_CALLBOOLEANMETHODA_RETURN(_ret_ref))
1371 DEFINE_CALLMETHODA(jbyte, Byte, T_BYTE
1372 , HOTSPOT_JNI_CALLBYTEMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1373 HOTSPOT_JNI_CALLBYTEMETHODA_RETURN(_ret_ref))
1374 DEFINE_CALLMETHODA(jchar, Char, T_CHAR
1375 , HOTSPOT_JNI_CALLCHARMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1376 HOTSPOT_JNI_CALLCHARMETHODA_RETURN(_ret_ref))
1377 DEFINE_CALLMETHODA(jshort, Short, T_SHORT
1378 , HOTSPOT_JNI_CALLSHORTMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1379 HOTSPOT_JNI_CALLSHORTMETHODA_RETURN(_ret_ref))
1380
1381 DEFINE_CALLMETHODA(jobject, Object, T_OBJECT
1382 , HOTSPOT_JNI_CALLOBJECTMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1383 HOTSPOT_JNI_CALLOBJECTMETHODA_RETURN(_ret_ref))
1384 DEFINE_CALLMETHODA(jint, Int, T_INT,
1385 HOTSPOT_JNI_CALLINTMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1386 HOTSPOT_JNI_CALLINTMETHODA_RETURN(_ret_ref))
1387 DEFINE_CALLMETHODA(jlong, Long, T_LONG
1388 , HOTSPOT_JNI_CALLLONGMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1389 HOTSPOT_JNI_CALLLONGMETHODA_RETURN(_ret_ref))
1390 // Float and double probes don't return value because dtrace doesn't currently support it
1391 DEFINE_CALLMETHODA(jfloat, Float, T_FLOAT
1392 , HOTSPOT_JNI_CALLFLOATMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1393 HOTSPOT_JNI_CALLFLOATMETHODA_RETURN())
1394 DEFINE_CALLMETHODA(jdouble, Double, T_DOUBLE
1395 , HOTSPOT_JNI_CALLDOUBLEMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1396 HOTSPOT_JNI_CALLDOUBLEMETHODA_RETURN())
1397
1398 DT_VOID_RETURN_MARK_DECL(CallVoidMethod, HOTSPOT_JNI_CALLVOIDMETHOD_RETURN());
1399 DT_VOID_RETURN_MARK_DECL(CallVoidMethodV, HOTSPOT_JNI_CALLVOIDMETHODV_RETURN());
1400 DT_VOID_RETURN_MARK_DECL(CallVoidMethodA, HOTSPOT_JNI_CALLVOIDMETHODA_RETURN());
1401
1402
1403 JNI_ENTRY(void, jni_CallVoidMethod(JNIEnv *env, jobject obj, jmethodID methodID, ...))
1404 JNIWrapper("CallVoidMethod");
1405 HOTSPOT_JNI_CALLVOIDMETHOD_ENTRY(env, obj, (uintptr_t) methodID);
1406 DT_VOID_RETURN_MARK(CallVoidMethod);
1407
1408 va_list args;
1409 va_start(args, methodID);
1410 JavaValue jvalue(T_VOID);
1411 JNI_ArgumentPusherVaArg ap(methodID, args);
1412 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK);
1413 va_end(args);
1414 JNI_END
1415
1416
1417 JNI_ENTRY(void, jni_CallVoidMethodV(JNIEnv *env, jobject obj, jmethodID methodID, va_list args))
1418 JNIWrapper("CallVoidMethodV");
1419 HOTSPOT_JNI_CALLVOIDMETHODV_ENTRY(env, obj, (uintptr_t) methodID);
1420 DT_VOID_RETURN_MARK(CallVoidMethodV);
1421
1422 JavaValue jvalue(T_VOID);
1423 JNI_ArgumentPusherVaArg ap(methodID, args);
1424 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK);
1425 JNI_END
1426
1427
1428 JNI_ENTRY(void, jni_CallVoidMethodA(JNIEnv *env, jobject obj, jmethodID methodID, const jvalue *args))
1429 JNIWrapper("CallVoidMethodA");
1430 HOTSPOT_JNI_CALLVOIDMETHODA_ENTRY(env, obj, (uintptr_t) methodID);
1431 DT_VOID_RETURN_MARK(CallVoidMethodA);
1432
1433 JavaValue jvalue(T_VOID);
1434 JNI_ArgumentPusherArray ap(methodID, args);
1435 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK);
1436 JNI_END
1437
1438
1439
1440 #define DEFINE_CALLNONVIRTUALMETHOD(ResultType, Result, Tag \
1441 , EntryProbe, ReturnProbe) \
1442 \
1443 DT_RETURN_MARK_DECL_FOR(Result, CallNonvirtual##Result##Method, ResultType \
1444 , ReturnProbe);\
1445 \
1446 JNI_ENTRY(ResultType, \
1447 jni_CallNonvirtual##Result##Method(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, ...)) \
1448 JNIWrapper("CallNonvitual" XSTR(Result) "Method"); \
1449 \
1450 EntryProbe;\
1451 ResultType ret;\
1452 DT_RETURN_MARK_FOR(Result, CallNonvirtual##Result##Method, ResultType, \
1453 (const ResultType&)ret);\
1454 \
1455 va_list args; \
1456 va_start(args, methodID); \
1457 JavaValue jvalue(Tag); \
1458 JNI_ArgumentPusherVaArg ap(methodID, args); \
1459 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_0); \
1460 va_end(args); \
1461 ret = jvalue.get_##ResultType(); \
1462 return ret;\
1463 JNI_END
1464
1465 // the runtime type of subword integral basic types is integer
1466 DEFINE_CALLNONVIRTUALMETHOD(jboolean, Boolean, T_BOOLEAN
1467 , HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1468 HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHOD_RETURN(_ret_ref))
1469 DEFINE_CALLNONVIRTUALMETHOD(jbyte, Byte, T_BYTE
1470 , HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1471 HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHOD_RETURN(_ret_ref))
1472 DEFINE_CALLNONVIRTUALMETHOD(jchar, Char, T_CHAR
1473 , HOTSPOT_JNI_CALLNONVIRTUALCHARMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1474 HOTSPOT_JNI_CALLNONVIRTUALCHARMETHOD_RETURN(_ret_ref))
1475 DEFINE_CALLNONVIRTUALMETHOD(jshort, Short, T_SHORT
1476 , HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1477 HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHOD_RETURN(_ret_ref))
1478
1479 DEFINE_CALLNONVIRTUALMETHOD(jobject, Object, T_OBJECT
1480 , HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1481 HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHOD_RETURN(_ret_ref))
1482 DEFINE_CALLNONVIRTUALMETHOD(jint, Int, T_INT
1483 , HOTSPOT_JNI_CALLNONVIRTUALINTMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1484 HOTSPOT_JNI_CALLNONVIRTUALINTMETHOD_RETURN(_ret_ref))
1485 DEFINE_CALLNONVIRTUALMETHOD(jlong, Long, T_LONG
1486 , HOTSPOT_JNI_CALLNONVIRTUALLONGMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1487 // Float and double probes don't return value because dtrace doesn't currently support it
1488 HOTSPOT_JNI_CALLNONVIRTUALLONGMETHOD_RETURN(_ret_ref))
1489 DEFINE_CALLNONVIRTUALMETHOD(jfloat, Float, T_FLOAT
1490 , HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1491 HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHOD_RETURN())
1492 DEFINE_CALLNONVIRTUALMETHOD(jdouble, Double, T_DOUBLE
1493 , HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1494 HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHOD_RETURN())
1495
1496 #define DEFINE_CALLNONVIRTUALMETHODV(ResultType, Result, Tag \
1497 , EntryProbe, ReturnProbe) \
1498 \
1499 DT_RETURN_MARK_DECL_FOR(Result, CallNonvirtual##Result##MethodV, ResultType \
1500 , ReturnProbe);\
1501 \
1502 JNI_ENTRY(ResultType, \
1503 jni_CallNonvirtual##Result##MethodV(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, va_list args)) \
1504 JNIWrapper("CallNonvitual" XSTR(Result) "MethodV"); \
1505 \
1506 EntryProbe;\
1507 ResultType ret;\
1508 DT_RETURN_MARK_FOR(Result, CallNonvirtual##Result##MethodV, ResultType, \
1509 (const ResultType&)ret);\
1510 \
1511 JavaValue jvalue(Tag); \
1512 JNI_ArgumentPusherVaArg ap(methodID, args); \
1513 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_0); \
1514 ret = jvalue.get_##ResultType(); \
1515 return ret;\
1516 JNI_END
1517
1518 // the runtime type of subword integral basic types is integer
1519 DEFINE_CALLNONVIRTUALMETHODV(jboolean, Boolean, T_BOOLEAN
1520 , HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1521 HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHODV_RETURN(_ret_ref))
1522 DEFINE_CALLNONVIRTUALMETHODV(jbyte, Byte, T_BYTE
1523 , HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1524 HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHODV_RETURN(_ret_ref))
1525 DEFINE_CALLNONVIRTUALMETHODV(jchar, Char, T_CHAR
1526 , HOTSPOT_JNI_CALLNONVIRTUALCHARMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1527 HOTSPOT_JNI_CALLNONVIRTUALCHARMETHODV_RETURN(_ret_ref))
1528 DEFINE_CALLNONVIRTUALMETHODV(jshort, Short, T_SHORT
1529 , HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1530 HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHODV_RETURN(_ret_ref))
1531
1532 DEFINE_CALLNONVIRTUALMETHODV(jobject, Object, T_OBJECT
1533 , HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1534 HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHODV_RETURN(_ret_ref))
1535 DEFINE_CALLNONVIRTUALMETHODV(jint, Int, T_INT
1536 , HOTSPOT_JNI_CALLNONVIRTUALINTMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1537 HOTSPOT_JNI_CALLNONVIRTUALINTMETHODV_RETURN(_ret_ref))
1538 DEFINE_CALLNONVIRTUALMETHODV(jlong, Long, T_LONG
1539 , HOTSPOT_JNI_CALLNONVIRTUALLONGMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1540 // Float and double probes don't return value because dtrace doesn't currently support it
1541 HOTSPOT_JNI_CALLNONVIRTUALLONGMETHODV_RETURN(_ret_ref))
1542 DEFINE_CALLNONVIRTUALMETHODV(jfloat, Float, T_FLOAT
1543 , HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1544 HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHODV_RETURN())
1545 DEFINE_CALLNONVIRTUALMETHODV(jdouble, Double, T_DOUBLE
1546 , HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1547 HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHODV_RETURN())
1548
1549 #define DEFINE_CALLNONVIRTUALMETHODA(ResultType, Result, Tag \
1550 , EntryProbe, ReturnProbe) \
1551 \
1552 DT_RETURN_MARK_DECL_FOR(Result, CallNonvirtual##Result##MethodA, ResultType \
1553 , ReturnProbe);\
1554 \
1555 JNI_ENTRY(ResultType, \
1556 jni_CallNonvirtual##Result##MethodA(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, const jvalue *args)) \
1557 JNIWrapper("CallNonvitual" XSTR(Result) "MethodA"); \
1558 \
1559 EntryProbe;\
1560 ResultType ret;\
1561 DT_RETURN_MARK_FOR(Result, CallNonvirtual##Result##MethodA, ResultType, \
1562 (const ResultType&)ret);\
1563 \
1564 JavaValue jvalue(Tag); \
1565 JNI_ArgumentPusherArray ap(methodID, args); \
1566 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_0); \
1567 ret = jvalue.get_##ResultType(); \
1568 return ret;\
1569 JNI_END
1570
1571 // the runtime type of subword integral basic types is integer
1572 DEFINE_CALLNONVIRTUALMETHODA(jboolean, Boolean, T_BOOLEAN
1573 , HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1574 HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHODA_RETURN(_ret_ref))
1575 DEFINE_CALLNONVIRTUALMETHODA(jbyte, Byte, T_BYTE
1576 , HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1577 HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHODA_RETURN(_ret_ref))
1578 DEFINE_CALLNONVIRTUALMETHODA(jchar, Char, T_CHAR
1579 , HOTSPOT_JNI_CALLNONVIRTUALCHARMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1580 HOTSPOT_JNI_CALLNONVIRTUALCHARMETHODA_RETURN(_ret_ref))
1581 DEFINE_CALLNONVIRTUALMETHODA(jshort, Short, T_SHORT
1582 , HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1583 HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHODA_RETURN(_ret_ref))
1584
1585 DEFINE_CALLNONVIRTUALMETHODA(jobject, Object, T_OBJECT
1586 , HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1587 HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHODA_RETURN(_ret_ref))
1588 DEFINE_CALLNONVIRTUALMETHODA(jint, Int, T_INT
1589 , HOTSPOT_JNI_CALLNONVIRTUALINTMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1590 HOTSPOT_JNI_CALLNONVIRTUALINTMETHODA_RETURN(_ret_ref))
1591 DEFINE_CALLNONVIRTUALMETHODA(jlong, Long, T_LONG
1592 , HOTSPOT_JNI_CALLNONVIRTUALLONGMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1593 // Float and double probes don't return value because dtrace doesn't currently support it
1594 HOTSPOT_JNI_CALLNONVIRTUALLONGMETHODA_RETURN(_ret_ref))
1595 DEFINE_CALLNONVIRTUALMETHODA(jfloat, Float, T_FLOAT
1596 , HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1597 HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHODA_RETURN())
1598 DEFINE_CALLNONVIRTUALMETHODA(jdouble, Double, T_DOUBLE
1599 , HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1600 HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHODA_RETURN())
1601
1602 DT_VOID_RETURN_MARK_DECL(CallNonvirtualVoidMethod
1603 , HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHOD_RETURN());
1604 DT_VOID_RETURN_MARK_DECL(CallNonvirtualVoidMethodV
1605 , HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHODV_RETURN());
1606 DT_VOID_RETURN_MARK_DECL(CallNonvirtualVoidMethodA
1607 , HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHODA_RETURN());
1608
1609 JNI_ENTRY(void, jni_CallNonvirtualVoidMethod(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, ...))
1610 JNIWrapper("CallNonvirtualVoidMethod");
1611
1612 HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHOD_ENTRY(env, obj, cls, (uintptr_t) methodID);
1613 DT_VOID_RETURN_MARK(CallNonvirtualVoidMethod);
1614
1615 va_list args;
1616 va_start(args, methodID);
1617 JavaValue jvalue(T_VOID);
1618 JNI_ArgumentPusherVaArg ap(methodID, args);
1619 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK);
1620 va_end(args);
1621 JNI_END
1622
1623
1624 JNI_ENTRY(void, jni_CallNonvirtualVoidMethodV(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, va_list args))
1625 JNIWrapper("CallNonvirtualVoidMethodV");
1626
1627 HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHODV_ENTRY(
1628 env, obj, cls, (uintptr_t) methodID);
1629 DT_VOID_RETURN_MARK(CallNonvirtualVoidMethodV);
1630
1631 JavaValue jvalue(T_VOID);
1632 JNI_ArgumentPusherVaArg ap(methodID, args);
1633 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK);
1634 JNI_END
1635
1636
1637 JNI_ENTRY(void, jni_CallNonvirtualVoidMethodA(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, const jvalue *args))
1638 JNIWrapper("CallNonvirtualVoidMethodA");
1639 HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHODA_ENTRY(
1640 env, obj, cls, (uintptr_t) methodID);
1641 DT_VOID_RETURN_MARK(CallNonvirtualVoidMethodA);
1642 JavaValue jvalue(T_VOID);
1643 JNI_ArgumentPusherArray ap(methodID, args);
1644 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK);
1645 JNI_END
1646
1647
1648
1649 #define DEFINE_CALLSTATICMETHOD(ResultType, Result, Tag \
1650 , EntryProbe, ResultProbe) \
1651 \
1652 DT_RETURN_MARK_DECL_FOR(Result, CallStatic##Result##Method, ResultType \
1653 , ResultProbe); \
1654 \
1655 JNI_ENTRY(ResultType, \
1656 jni_CallStatic##Result##Method(JNIEnv *env, jclass cls, jmethodID methodID, ...)) \
1657 JNIWrapper("CallStatic" XSTR(Result) "Method"); \
1658 \
1659 EntryProbe; \
1660 ResultType ret = 0;\
1661 DT_RETURN_MARK_FOR(Result, CallStatic##Result##Method, ResultType, \
1662 (const ResultType&)ret);\
1663 \
1664 va_list args; \
1665 va_start(args, methodID); \
1666 JavaValue jvalue(Tag); \
1667 JNI_ArgumentPusherVaArg ap(methodID, args); \
1668 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK_0); \
1669 va_end(args); \
1670 ret = jvalue.get_##ResultType(); \
1671 return ret;\
1672 JNI_END
1673
1674 // the runtime type of subword integral basic types is integer
1675 DEFINE_CALLSTATICMETHOD(jboolean, Boolean, T_BOOLEAN
1676 , HOTSPOT_JNI_CALLSTATICBOOLEANMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1677 HOTSPOT_JNI_CALLSTATICBOOLEANMETHOD_RETURN(_ret_ref));
1678 DEFINE_CALLSTATICMETHOD(jbyte, Byte, T_BYTE
1679 , HOTSPOT_JNI_CALLSTATICBYTEMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1680 HOTSPOT_JNI_CALLSTATICBYTEMETHOD_RETURN(_ret_ref));
1681 DEFINE_CALLSTATICMETHOD(jchar, Char, T_CHAR
1682 , HOTSPOT_JNI_CALLSTATICCHARMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1683 HOTSPOT_JNI_CALLSTATICCHARMETHOD_RETURN(_ret_ref));
1684 DEFINE_CALLSTATICMETHOD(jshort, Short, T_SHORT
1685 , HOTSPOT_JNI_CALLSTATICSHORTMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1686 HOTSPOT_JNI_CALLSTATICSHORTMETHOD_RETURN(_ret_ref));
1687
1688 DEFINE_CALLSTATICMETHOD(jobject, Object, T_OBJECT
1689 , HOTSPOT_JNI_CALLSTATICOBJECTMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1690 HOTSPOT_JNI_CALLSTATICOBJECTMETHOD_RETURN(_ret_ref));
1691 DEFINE_CALLSTATICMETHOD(jint, Int, T_INT
1692 , HOTSPOT_JNI_CALLSTATICINTMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1693 HOTSPOT_JNI_CALLSTATICINTMETHOD_RETURN(_ret_ref));
1694 DEFINE_CALLSTATICMETHOD(jlong, Long, T_LONG
1695 , HOTSPOT_JNI_CALLSTATICLONGMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1696 HOTSPOT_JNI_CALLSTATICLONGMETHOD_RETURN(_ret_ref));
1697 // Float and double probes don't return value because dtrace doesn't currently support it
1698 DEFINE_CALLSTATICMETHOD(jfloat, Float, T_FLOAT
1699 , HOTSPOT_JNI_CALLSTATICFLOATMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1700 HOTSPOT_JNI_CALLSTATICFLOATMETHOD_RETURN());
1701 DEFINE_CALLSTATICMETHOD(jdouble, Double, T_DOUBLE
1702 , HOTSPOT_JNI_CALLSTATICDOUBLEMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1703 HOTSPOT_JNI_CALLSTATICDOUBLEMETHOD_RETURN());
1704
1705 #define DEFINE_CALLSTATICMETHODV(ResultType, Result, Tag \
1706 , EntryProbe, ResultProbe) \
1707 \
1708 DT_RETURN_MARK_DECL_FOR(Result, CallStatic##Result##MethodV, ResultType \
1709 , ResultProbe); \
1710 \
1711 JNI_ENTRY(ResultType, \
1712 jni_CallStatic##Result##MethodV(JNIEnv *env, jclass cls, jmethodID methodID, va_list args)) \
1713 JNIWrapper("CallStatic" XSTR(Result) "MethodV"); \
1714 \
1715 EntryProbe; \
1716 ResultType ret = 0;\
1717 DT_RETURN_MARK_FOR(Result, CallStatic##Result##MethodV, ResultType, \
1718 (const ResultType&)ret);\
1719 \
1720 JavaValue jvalue(Tag); \
1721 JNI_ArgumentPusherVaArg ap(methodID, args); \
1722 /* Make sure class is initialized before trying to invoke its method */ \
1723 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); \
1724 k->initialize(CHECK_0); \
1725 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK_0); \
1726 va_end(args); \
1727 ret = jvalue.get_##ResultType(); \
1728 return ret;\
1729 JNI_END
1730
1731 // the runtime type of subword integral basic types is integer
1732 DEFINE_CALLSTATICMETHODV(jboolean, Boolean, T_BOOLEAN
1733 , HOTSPOT_JNI_CALLSTATICBOOLEANMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1734 HOTSPOT_JNI_CALLSTATICBOOLEANMETHODV_RETURN(_ret_ref));
1735 DEFINE_CALLSTATICMETHODV(jbyte, Byte, T_BYTE
1736 , HOTSPOT_JNI_CALLSTATICBYTEMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1737 HOTSPOT_JNI_CALLSTATICBYTEMETHODV_RETURN(_ret_ref));
1738 DEFINE_CALLSTATICMETHODV(jchar, Char, T_CHAR
1739 , HOTSPOT_JNI_CALLSTATICCHARMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1740 HOTSPOT_JNI_CALLSTATICCHARMETHODV_RETURN(_ret_ref));
1741 DEFINE_CALLSTATICMETHODV(jshort, Short, T_SHORT
1742 , HOTSPOT_JNI_CALLSTATICSHORTMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1743 HOTSPOT_JNI_CALLSTATICSHORTMETHODV_RETURN(_ret_ref));
1744
1745 DEFINE_CALLSTATICMETHODV(jobject, Object, T_OBJECT
1746 , HOTSPOT_JNI_CALLSTATICOBJECTMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1747 HOTSPOT_JNI_CALLSTATICOBJECTMETHODV_RETURN(_ret_ref));
1748 DEFINE_CALLSTATICMETHODV(jint, Int, T_INT
1749 , HOTSPOT_JNI_CALLSTATICINTMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1750 HOTSPOT_JNI_CALLSTATICINTMETHODV_RETURN(_ret_ref));
1751 DEFINE_CALLSTATICMETHODV(jlong, Long, T_LONG
1752 , HOTSPOT_JNI_CALLSTATICLONGMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1753 HOTSPOT_JNI_CALLSTATICLONGMETHODV_RETURN(_ret_ref));
1754 // Float and double probes don't return value because dtrace doesn't currently support it
1755 DEFINE_CALLSTATICMETHODV(jfloat, Float, T_FLOAT
1756 , HOTSPOT_JNI_CALLSTATICFLOATMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1757 HOTSPOT_JNI_CALLSTATICFLOATMETHODV_RETURN());
1758 DEFINE_CALLSTATICMETHODV(jdouble, Double, T_DOUBLE
1759 , HOTSPOT_JNI_CALLSTATICDOUBLEMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1760 HOTSPOT_JNI_CALLSTATICDOUBLEMETHODV_RETURN());
1761
1762 #define DEFINE_CALLSTATICMETHODA(ResultType, Result, Tag \
1763 , EntryProbe, ResultProbe) \
1764 \
1765 DT_RETURN_MARK_DECL_FOR(Result, CallStatic##Result##MethodA, ResultType \
1766 , ResultProbe); \
1767 \
1768 JNI_ENTRY(ResultType, \
1769 jni_CallStatic##Result##MethodA(JNIEnv *env, jclass cls, jmethodID methodID, const jvalue *args)) \
1770 JNIWrapper("CallStatic" XSTR(Result) "MethodA"); \
1771 \
1772 EntryProbe; \
1773 ResultType ret = 0;\
1774 DT_RETURN_MARK_FOR(Result, CallStatic##Result##MethodA, ResultType, \
1775 (const ResultType&)ret);\
1776 \
1777 JavaValue jvalue(Tag); \
1778 JNI_ArgumentPusherArray ap(methodID, args); \
1779 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK_0); \
1780 ret = jvalue.get_##ResultType(); \
1781 return ret;\
1782 JNI_END
1783
1784 // the runtime type of subword integral basic types is integer
1785 DEFINE_CALLSTATICMETHODA(jboolean, Boolean, T_BOOLEAN
1786 , HOTSPOT_JNI_CALLSTATICBOOLEANMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1787 HOTSPOT_JNI_CALLSTATICBOOLEANMETHODA_RETURN(_ret_ref));
1788 DEFINE_CALLSTATICMETHODA(jbyte, Byte, T_BYTE
1789 , HOTSPOT_JNI_CALLSTATICBYTEMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1790 HOTSPOT_JNI_CALLSTATICBYTEMETHODA_RETURN(_ret_ref));
1791 DEFINE_CALLSTATICMETHODA(jchar, Char, T_CHAR
1792 , HOTSPOT_JNI_CALLSTATICCHARMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1793 HOTSPOT_JNI_CALLSTATICCHARMETHODA_RETURN(_ret_ref));
1794 DEFINE_CALLSTATICMETHODA(jshort, Short, T_SHORT
1795 , HOTSPOT_JNI_CALLSTATICSHORTMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1796 HOTSPOT_JNI_CALLSTATICSHORTMETHODA_RETURN(_ret_ref));
1797
1798 DEFINE_CALLSTATICMETHODA(jobject, Object, T_OBJECT
1799 , HOTSPOT_JNI_CALLSTATICOBJECTMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1800 HOTSPOT_JNI_CALLSTATICOBJECTMETHODA_RETURN(_ret_ref));
1801 DEFINE_CALLSTATICMETHODA(jint, Int, T_INT
1802 , HOTSPOT_JNI_CALLSTATICINTMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1803 HOTSPOT_JNI_CALLSTATICINTMETHODA_RETURN(_ret_ref));
1804 DEFINE_CALLSTATICMETHODA(jlong, Long, T_LONG
1805 , HOTSPOT_JNI_CALLSTATICLONGMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1806 HOTSPOT_JNI_CALLSTATICLONGMETHODA_RETURN(_ret_ref));
1807 // Float and double probes don't return value because dtrace doesn't currently support it
1808 DEFINE_CALLSTATICMETHODA(jfloat, Float, T_FLOAT
1809 , HOTSPOT_JNI_CALLSTATICFLOATMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1810 HOTSPOT_JNI_CALLSTATICFLOATMETHODA_RETURN());
1811 DEFINE_CALLSTATICMETHODA(jdouble, Double, T_DOUBLE
1812 , HOTSPOT_JNI_CALLSTATICDOUBLEMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1813 HOTSPOT_JNI_CALLSTATICDOUBLEMETHODA_RETURN());
1814
1815 DT_VOID_RETURN_MARK_DECL(CallStaticVoidMethod
1816 , HOTSPOT_JNI_CALLSTATICVOIDMETHOD_RETURN());
1817 DT_VOID_RETURN_MARK_DECL(CallStaticVoidMethodV
1818 , HOTSPOT_JNI_CALLSTATICVOIDMETHODV_RETURN());
1819 DT_VOID_RETURN_MARK_DECL(CallStaticVoidMethodA
1820 , HOTSPOT_JNI_CALLSTATICVOIDMETHODA_RETURN());
1821
1822 JNI_ENTRY(void, jni_CallStaticVoidMethod(JNIEnv *env, jclass cls, jmethodID methodID, ...))
1823 JNIWrapper("CallStaticVoidMethod");
1824 HOTSPOT_JNI_CALLSTATICVOIDMETHOD_ENTRY(env, cls, (uintptr_t) methodID);
1825 DT_VOID_RETURN_MARK(CallStaticVoidMethod);
1826
1827 va_list args;
1828 va_start(args, methodID);
1829 JavaValue jvalue(T_VOID);
1830 JNI_ArgumentPusherVaArg ap(methodID, args);
1831 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK);
1832 va_end(args);
1833 JNI_END
1834
1835
1836 JNI_ENTRY(void, jni_CallStaticVoidMethodV(JNIEnv *env, jclass cls, jmethodID methodID, va_list args))
1837 JNIWrapper("CallStaticVoidMethodV");
1838 HOTSPOT_JNI_CALLSTATICVOIDMETHODV_ENTRY(env, cls, (uintptr_t) methodID);
1839 DT_VOID_RETURN_MARK(CallStaticVoidMethodV);
1840
1841 JavaValue jvalue(T_VOID);
1842 JNI_ArgumentPusherVaArg ap(methodID, args);
1843 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK);
1844 JNI_END
1845
1846
1847 JNI_ENTRY(void, jni_CallStaticVoidMethodA(JNIEnv *env, jclass cls, jmethodID methodID, const jvalue *args))
1848 JNIWrapper("CallStaticVoidMethodA");
1849 HOTSPOT_JNI_CALLSTATICVOIDMETHODA_ENTRY(env, cls, (uintptr_t) methodID);
1850 DT_VOID_RETURN_MARK(CallStaticVoidMethodA);
1851
1852 JavaValue jvalue(T_VOID);
1853 JNI_ArgumentPusherArray ap(methodID, args);
1854 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK);
1855 JNI_END
1856
1857
1858 //
1859 // Accessing Fields
1860 //
1861
1862
1863 DT_RETURN_MARK_DECL(GetFieldID, jfieldID
1864 , HOTSPOT_JNI_GETFIELDID_RETURN((uintptr_t)_ret_ref));
1865
1866 JNI_ENTRY(jfieldID, jni_GetFieldID(JNIEnv *env, jclass clazz,
1867 const char *name, const char *sig))
1868 JNIWrapper("GetFieldID");
1869 HOTSPOT_JNI_GETFIELDID_ENTRY(env, clazz, (char *) name, (char *) sig);
1870 jfieldID ret = 0;
1871 DT_RETURN_MARK(GetFieldID, jfieldID, (const jfieldID&)ret);
1872
1873 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz));
1874
1875 // The class should have been loaded (we have an instance of the class
1876 // passed in) so the field and signature should already be in the symbol
1877 // table. If they're not there, the field doesn't exist.
1878 TempNewSymbol fieldname = SymbolTable::probe(name, (int)strlen(name));
1879 TempNewSymbol signame = SymbolTable::probe(sig, (int)strlen(sig));
1880 if (fieldname == NULL || signame == NULL) {
1881 ResourceMark rm;
1882 THROW_MSG_0(vmSymbols::java_lang_NoSuchFieldError(), err_msg("%s.%s %s", k->external_name(), name, sig));
1883 }
1884
1885 // Make sure class is initialized before handing id's out to fields
1886 k->initialize(CHECK_NULL);
1887
1888 fieldDescriptor fd;
1889 if (!k->is_instance_klass() ||
1890 !InstanceKlass::cast(k)->find_field(fieldname, signame, false, &fd)) {
1891 ResourceMark rm;
1892 THROW_MSG_0(vmSymbols::java_lang_NoSuchFieldError(), err_msg("%s.%s %s", k->external_name(), name, sig));
1893 }
1894
1895 // A jfieldID for a non-static field is simply the offset of the field within the instanceOop
1896 // It may also have hash bits for k, if VerifyJNIFields is turned on.
1897 ret = jfieldIDWorkaround::to_instance_jfieldID(k, fd.offset());
1898 return ret;
1899 JNI_END
1900
1901
1902 JNI_ENTRY(jobject, jni_GetObjectField(JNIEnv *env, jobject obj, jfieldID fieldID))
1903 JNIWrapper("GetObjectField");
1904 HOTSPOT_JNI_GETOBJECTFIELD_ENTRY(env, obj, (uintptr_t) fieldID);
1905 oop o = JNIHandles::resolve_non_null(obj);
1906 Klass* k = o->klass();
1907 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID);
1908 // Keep JVMTI addition small and only check enabled flag here.
1909 // jni_GetField_probe() assumes that is okay to create handles.
1910 if (JvmtiExport::should_post_field_access()) {
1911 o = JvmtiExport::jni_GetField_probe(thread, obj, o, k, fieldID, false);
1912 }
1913 oop loaded_obj = HeapAccess<ON_UNKNOWN_OOP_REF>::oop_load_at(o, offset);
1914 jobject ret = JNIHandles::make_local(THREAD, loaded_obj);
1915 HOTSPOT_JNI_GETOBJECTFIELD_RETURN(ret);
1916 return ret;
1917 JNI_END
1918
1919
1920
1921 #define DEFINE_GETFIELD(Return,Fieldname,Result \
1922 , EntryProbe, ReturnProbe) \
1923 \
1924 DT_RETURN_MARK_DECL_FOR(Result, Get##Result##Field, Return \
1925 , ReturnProbe); \
1926 \
1927 JNI_ENTRY_NO_PRESERVE(Return, jni_Get##Result##Field(JNIEnv *env, jobject obj, jfieldID fieldID)) \
1928 JNIWrapper("Get" XSTR(Result) "Field"); \
1929 \
1930 EntryProbe; \
1931 Return ret = 0;\
1932 DT_RETURN_MARK_FOR(Result, Get##Result##Field, Return, (const Return&)ret);\
1933 \
1934 oop o = JNIHandles::resolve_non_null(obj); \
1935 Klass* k = o->klass(); \
1936 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID); \
1937 /* Keep JVMTI addition small and only check enabled flag here. */ \
1938 /* jni_GetField_probe_nh() assumes that is not okay to create handles */ \
1939 /* and creates a ResetNoHandleMark. */ \
1940 if (JvmtiExport::should_post_field_access()) { \
1941 o = JvmtiExport::jni_GetField_probe_nh(thread, obj, o, k, fieldID, false); \
1942 } \
1943 ret = o->Fieldname##_field(offset); \
1944 return ret; \
1945 JNI_END
1946
1947 DEFINE_GETFIELD(jboolean, bool, Boolean
1948 , HOTSPOT_JNI_GETBOOLEANFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
1949 HOTSPOT_JNI_GETBOOLEANFIELD_RETURN(_ret_ref))
1950 DEFINE_GETFIELD(jbyte, byte, Byte
1951 , HOTSPOT_JNI_GETBYTEFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
1952 HOTSPOT_JNI_GETBYTEFIELD_RETURN(_ret_ref))
1953 DEFINE_GETFIELD(jchar, char, Char
1954 , HOTSPOT_JNI_GETCHARFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
1955 HOTSPOT_JNI_GETCHARFIELD_RETURN(_ret_ref))
1956 DEFINE_GETFIELD(jshort, short, Short
1957 , HOTSPOT_JNI_GETSHORTFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
1958 HOTSPOT_JNI_GETSHORTFIELD_RETURN(_ret_ref))
1959 DEFINE_GETFIELD(jint, int, Int
1960 , HOTSPOT_JNI_GETINTFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
1961 HOTSPOT_JNI_GETINTFIELD_RETURN(_ret_ref))
1962 DEFINE_GETFIELD(jlong, long, Long
1963 , HOTSPOT_JNI_GETLONGFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
1964 HOTSPOT_JNI_GETLONGFIELD_RETURN(_ret_ref))
1965 // Float and double probes don't return value because dtrace doesn't currently support it
1966 DEFINE_GETFIELD(jfloat, float, Float
1967 , HOTSPOT_JNI_GETFLOATFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
1968 HOTSPOT_JNI_GETFLOATFIELD_RETURN())
1969 DEFINE_GETFIELD(jdouble, double, Double
1970 , HOTSPOT_JNI_GETDOUBLEFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
1971 HOTSPOT_JNI_GETDOUBLEFIELD_RETURN())
1972
1973 address jni_GetBooleanField_addr() {
1974 return (address)jni_GetBooleanField;
1975 }
1976 address jni_GetByteField_addr() {
1977 return (address)jni_GetByteField;
1978 }
1979 address jni_GetCharField_addr() {
1980 return (address)jni_GetCharField;
1981 }
1982 address jni_GetShortField_addr() {
1983 return (address)jni_GetShortField;
1984 }
1985 address jni_GetIntField_addr() {
1986 return (address)jni_GetIntField;
1987 }
1988 address jni_GetLongField_addr() {
1989 return (address)jni_GetLongField;
1990 }
1991 address jni_GetFloatField_addr() {
1992 return (address)jni_GetFloatField;
1993 }
1994 address jni_GetDoubleField_addr() {
1995 return (address)jni_GetDoubleField;
1996 }
1997
1998 JNI_ENTRY_NO_PRESERVE(void, jni_SetObjectField(JNIEnv *env, jobject obj, jfieldID fieldID, jobject value))
1999 JNIWrapper("SetObjectField");
2000 HOTSPOT_JNI_SETOBJECTFIELD_ENTRY(env, obj, (uintptr_t) fieldID, value);
2001 oop o = JNIHandles::resolve_non_null(obj);
2002 Klass* k = o->klass();
2003 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID);
2004 // Keep JVMTI addition small and only check enabled flag here.
2005 // jni_SetField_probe_nh() assumes that is not okay to create handles
2006 // and creates a ResetNoHandleMark.
2007 if (JvmtiExport::should_post_field_modification()) {
2008 jvalue field_value;
2009 field_value.l = value;
2010 o = JvmtiExport::jni_SetField_probe_nh(thread, obj, o, k, fieldID, false, JVM_SIGNATURE_CLASS, (jvalue *)&field_value);
2011 }
2012 HeapAccess<ON_UNKNOWN_OOP_REF>::oop_store_at(o, offset, JNIHandles::resolve(value));
2013 HOTSPOT_JNI_SETOBJECTFIELD_RETURN();
2014 JNI_END
2015
2016
2017 #define DEFINE_SETFIELD(Argument,Fieldname,Result,SigType,unionType \
2018 , EntryProbe, ReturnProbe) \
2019 \
2020 JNI_ENTRY_NO_PRESERVE(void, jni_Set##Result##Field(JNIEnv *env, jobject obj, jfieldID fieldID, Argument value)) \
2021 JNIWrapper("Set" XSTR(Result) "Field"); \
2022 \
2023 EntryProbe; \
2024 \
2025 oop o = JNIHandles::resolve_non_null(obj); \
2026 Klass* k = o->klass(); \
2027 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID); \
2028 /* Keep JVMTI addition small and only check enabled flag here. */ \
2029 /* jni_SetField_probe_nh() assumes that is not okay to create handles */ \
2030 /* and creates a ResetNoHandleMark. */ \
2031 if (JvmtiExport::should_post_field_modification()) { \
2032 jvalue field_value; \
2033 field_value.unionType = value; \
2034 o = JvmtiExport::jni_SetField_probe_nh(thread, obj, o, k, fieldID, false, SigType, (jvalue *)&field_value); \
2035 } \
2036 if (SigType == JVM_SIGNATURE_BOOLEAN) { value = ((jboolean)value) & 1; } \
2037 o->Fieldname##_field_put(offset, value); \
2038 ReturnProbe; \
2039 JNI_END
2040
2041 DEFINE_SETFIELD(jboolean, bool, Boolean, JVM_SIGNATURE_BOOLEAN, z
2042 , HOTSPOT_JNI_SETBOOLEANFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value),
2043 HOTSPOT_JNI_SETBOOLEANFIELD_RETURN())
2044 DEFINE_SETFIELD(jbyte, byte, Byte, JVM_SIGNATURE_BYTE, b
2045 , HOTSPOT_JNI_SETBYTEFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value),
2046 HOTSPOT_JNI_SETBYTEFIELD_RETURN())
2047 DEFINE_SETFIELD(jchar, char, Char, JVM_SIGNATURE_CHAR, c
2048 , HOTSPOT_JNI_SETCHARFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value),
2049 HOTSPOT_JNI_SETCHARFIELD_RETURN())
2050 DEFINE_SETFIELD(jshort, short, Short, JVM_SIGNATURE_SHORT, s
2051 , HOTSPOT_JNI_SETSHORTFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value),
2052 HOTSPOT_JNI_SETSHORTFIELD_RETURN())
2053 DEFINE_SETFIELD(jint, int, Int, JVM_SIGNATURE_INT, i
2054 , HOTSPOT_JNI_SETINTFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value),
2055 HOTSPOT_JNI_SETINTFIELD_RETURN())
2056 DEFINE_SETFIELD(jlong, long, Long, JVM_SIGNATURE_LONG, j
2057 , HOTSPOT_JNI_SETLONGFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value),
2058 HOTSPOT_JNI_SETLONGFIELD_RETURN())
2059 // Float and double probes don't return value because dtrace doesn't currently support it
2060 DEFINE_SETFIELD(jfloat, float, Float, JVM_SIGNATURE_FLOAT, f
2061 , HOTSPOT_JNI_SETFLOATFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2062 HOTSPOT_JNI_SETFLOATFIELD_RETURN())
2063 DEFINE_SETFIELD(jdouble, double, Double, JVM_SIGNATURE_DOUBLE, d
2064 , HOTSPOT_JNI_SETDOUBLEFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2065 HOTSPOT_JNI_SETDOUBLEFIELD_RETURN())
2066
2067 DT_RETURN_MARK_DECL(ToReflectedField, jobject
2068 , HOTSPOT_JNI_TOREFLECTEDFIELD_RETURN(_ret_ref));
2069
2070 JNI_ENTRY(jobject, jni_ToReflectedField(JNIEnv *env, jclass cls, jfieldID fieldID, jboolean isStatic))
2071 JNIWrapper("ToReflectedField");
2072 HOTSPOT_JNI_TOREFLECTEDFIELD_ENTRY(env, cls, (uintptr_t) fieldID, isStatic);
2073 jobject ret = NULL;
2074 DT_RETURN_MARK(ToReflectedField, jobject, (const jobject&)ret);
2075
2076 fieldDescriptor fd;
2077 bool found = false;
2078 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2079
2080 assert(jfieldIDWorkaround::is_static_jfieldID(fieldID) == (isStatic != 0), "invalid fieldID");
2081
2082 if (isStatic) {
2083 // Static field. The fieldID a JNIid specifying the field holder and the offset within the Klass*.
2084 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID);
2085 assert(id->is_static_field_id(), "invalid static field id");
2086 found = id->find_local_field(&fd);
2087 } else {
2088 // Non-static field. The fieldID is really the offset of the field within the instanceOop.
2089 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID);
2090 found = InstanceKlass::cast(k)->find_field_from_offset(offset, false, &fd);
2091 }
2092 assert(found, "bad fieldID passed into jni_ToReflectedField");
2093 oop reflected = Reflection::new_field(&fd, CHECK_NULL);
2094 ret = JNIHandles::make_local(THREAD, reflected);
2095 return ret;
2096 JNI_END
2097
2098
2099 //
2100 // Accessing Static Fields
2101 //
2102 DT_RETURN_MARK_DECL(GetStaticFieldID, jfieldID
2103 , HOTSPOT_JNI_GETSTATICFIELDID_RETURN((uintptr_t)_ret_ref));
2104
2105 JNI_ENTRY(jfieldID, jni_GetStaticFieldID(JNIEnv *env, jclass clazz,
2106 const char *name, const char *sig))
2107 JNIWrapper("GetStaticFieldID");
2108 HOTSPOT_JNI_GETSTATICFIELDID_ENTRY(env, clazz, (char *) name, (char *) sig);
2109 jfieldID ret = NULL;
2110 DT_RETURN_MARK(GetStaticFieldID, jfieldID, (const jfieldID&)ret);
2111
2112 // The class should have been loaded (we have an instance of the class
2113 // passed in) so the field and signature should already be in the symbol
2114 // table. If they're not there, the field doesn't exist.
2115 TempNewSymbol fieldname = SymbolTable::probe(name, (int)strlen(name));
2116 TempNewSymbol signame = SymbolTable::probe(sig, (int)strlen(sig));
2117 if (fieldname == NULL || signame == NULL) {
2118 THROW_MSG_0(vmSymbols::java_lang_NoSuchFieldError(), (char*) name);
2119 }
2120 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz));
2121 // Make sure class is initialized before handing id's out to static fields
2122 k->initialize(CHECK_NULL);
2123
2124 fieldDescriptor fd;
2125 if (!k->is_instance_klass() ||
2126 !InstanceKlass::cast(k)->find_field(fieldname, signame, true, &fd)) {
2127 THROW_MSG_0(vmSymbols::java_lang_NoSuchFieldError(), (char*) name);
2128 }
2129
2130 // A jfieldID for a static field is a JNIid specifying the field holder and the offset within the Klass*
2131 JNIid* id = fd.field_holder()->jni_id_for(fd.offset());
2132 debug_only(id->set_is_static_field_id();)
2133
2134 debug_only(id->verify(fd.field_holder()));
2135
2136 ret = jfieldIDWorkaround::to_static_jfieldID(id);
2137 return ret;
2138 JNI_END
2139
2140
2141 JNI_ENTRY(jobject, jni_GetStaticObjectField(JNIEnv *env, jclass clazz, jfieldID fieldID))
2142 JNIWrapper("GetStaticObjectField");
2143 HOTSPOT_JNI_GETSTATICOBJECTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID);
2144 #if INCLUDE_JNI_CHECK
2145 DEBUG_ONLY(Klass* param_k = jniCheck::validate_class(thread, clazz);)
2146 #endif // INCLUDE_JNI_CHECK
2147 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID);
2148 assert(id->is_static_field_id(), "invalid static field id");
2149 // Keep JVMTI addition small and only check enabled flag here.
2150 // jni_GetField_probe() assumes that is okay to create handles.
2151 if (JvmtiExport::should_post_field_access()) {
2152 JvmtiExport::jni_GetField_probe(thread, NULL, NULL, id->holder(), fieldID, true);
2153 }
2154 jobject ret = JNIHandles::make_local(THREAD, id->holder()->java_mirror()->obj_field(id->offset()));
2155 HOTSPOT_JNI_GETSTATICOBJECTFIELD_RETURN(ret);
2156 return ret;
2157 JNI_END
2158
2159
2160 #define DEFINE_GETSTATICFIELD(Return,Fieldname,Result \
2161 , EntryProbe, ReturnProbe) \
2162 \
2163 DT_RETURN_MARK_DECL_FOR(Result, GetStatic##Result##Field, Return \
2164 , ReturnProbe); \
2165 \
2166 JNI_ENTRY(Return, jni_GetStatic##Result##Field(JNIEnv *env, jclass clazz, jfieldID fieldID)) \
2167 JNIWrapper("GetStatic" XSTR(Result) "Field"); \
2168 EntryProbe; \
2169 Return ret = 0;\
2170 DT_RETURN_MARK_FOR(Result, GetStatic##Result##Field, Return, \
2171 (const Return&)ret);\
2172 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID); \
2173 assert(id->is_static_field_id(), "invalid static field id"); \
2174 /* Keep JVMTI addition small and only check enabled flag here. */ \
2175 /* jni_GetField_probe() assumes that is okay to create handles. */ \
2176 if (JvmtiExport::should_post_field_access()) { \
2177 JvmtiExport::jni_GetField_probe(thread, NULL, NULL, id->holder(), fieldID, true); \
2178 } \
2179 ret = id->holder()->java_mirror()-> Fieldname##_field (id->offset()); \
2180 return ret;\
2181 JNI_END
2182
2183 DEFINE_GETSTATICFIELD(jboolean, bool, Boolean
2184 , HOTSPOT_JNI_GETSTATICBOOLEANFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICBOOLEANFIELD_RETURN(_ret_ref))
2185 DEFINE_GETSTATICFIELD(jbyte, byte, Byte
2186 , HOTSPOT_JNI_GETSTATICBYTEFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICBYTEFIELD_RETURN(_ret_ref) )
2187 DEFINE_GETSTATICFIELD(jchar, char, Char
2188 , HOTSPOT_JNI_GETSTATICCHARFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICCHARFIELD_RETURN(_ret_ref) )
2189 DEFINE_GETSTATICFIELD(jshort, short, Short
2190 , HOTSPOT_JNI_GETSTATICSHORTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICSHORTFIELD_RETURN(_ret_ref) )
2191 DEFINE_GETSTATICFIELD(jint, int, Int
2192 , HOTSPOT_JNI_GETSTATICINTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICINTFIELD_RETURN(_ret_ref) )
2193 DEFINE_GETSTATICFIELD(jlong, long, Long
2194 , HOTSPOT_JNI_GETSTATICLONGFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICLONGFIELD_RETURN(_ret_ref) )
2195 // Float and double probes don't return value because dtrace doesn't currently support it
2196 DEFINE_GETSTATICFIELD(jfloat, float, Float
2197 , HOTSPOT_JNI_GETSTATICFLOATFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICFLOATFIELD_RETURN() )
2198 DEFINE_GETSTATICFIELD(jdouble, double, Double
2199 , HOTSPOT_JNI_GETSTATICDOUBLEFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICDOUBLEFIELD_RETURN() )
2200
2201 JNI_ENTRY(void, jni_SetStaticObjectField(JNIEnv *env, jclass clazz, jfieldID fieldID, jobject value))
2202 JNIWrapper("SetStaticObjectField");
2203 HOTSPOT_JNI_SETSTATICOBJECTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value);
2204 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID);
2205 assert(id->is_static_field_id(), "invalid static field id");
2206 // Keep JVMTI addition small and only check enabled flag here.
2207 // jni_SetField_probe() assumes that is okay to create handles.
2208 if (JvmtiExport::should_post_field_modification()) {
2209 jvalue field_value;
2210 field_value.l = value;
2211 JvmtiExport::jni_SetField_probe(thread, NULL, NULL, id->holder(), fieldID, true, JVM_SIGNATURE_CLASS, (jvalue *)&field_value);
2212 }
2213 id->holder()->java_mirror()->obj_field_put(id->offset(), JNIHandles::resolve(value));
2214 HOTSPOT_JNI_SETSTATICOBJECTFIELD_RETURN();
2215 JNI_END
2216
2217
2218
2219 #define DEFINE_SETSTATICFIELD(Argument,Fieldname,Result,SigType,unionType \
2220 , EntryProbe, ReturnProbe) \
2221 \
2222 JNI_ENTRY(void, jni_SetStatic##Result##Field(JNIEnv *env, jclass clazz, jfieldID fieldID, Argument value)) \
2223 JNIWrapper("SetStatic" XSTR(Result) "Field"); \
2224 EntryProbe; \
2225 \
2226 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID); \
2227 assert(id->is_static_field_id(), "invalid static field id"); \
2228 /* Keep JVMTI addition small and only check enabled flag here. */ \
2229 /* jni_SetField_probe() assumes that is okay to create handles. */ \
2230 if (JvmtiExport::should_post_field_modification()) { \
2231 jvalue field_value; \
2232 field_value.unionType = value; \
2233 JvmtiExport::jni_SetField_probe(thread, NULL, NULL, id->holder(), fieldID, true, SigType, (jvalue *)&field_value); \
2234 } \
2235 if (SigType == JVM_SIGNATURE_BOOLEAN) { value = ((jboolean)value) & 1; } \
2236 id->holder()->java_mirror()-> Fieldname##_field_put (id->offset(), value); \
2237 ReturnProbe;\
2238 JNI_END
2239
2240 DEFINE_SETSTATICFIELD(jboolean, bool, Boolean, JVM_SIGNATURE_BOOLEAN, z
2241 , HOTSPOT_JNI_SETSTATICBOOLEANFIELD_ENTRY(env, clazz, (uintptr_t)fieldID, value),
2242 HOTSPOT_JNI_SETSTATICBOOLEANFIELD_RETURN())
2243 DEFINE_SETSTATICFIELD(jbyte, byte, Byte, JVM_SIGNATURE_BYTE, b
2244 , HOTSPOT_JNI_SETSTATICBYTEFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value),
2245 HOTSPOT_JNI_SETSTATICBYTEFIELD_RETURN())
2246 DEFINE_SETSTATICFIELD(jchar, char, Char, JVM_SIGNATURE_CHAR, c
2247 , HOTSPOT_JNI_SETSTATICCHARFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value),
2248 HOTSPOT_JNI_SETSTATICCHARFIELD_RETURN())
2249 DEFINE_SETSTATICFIELD(jshort, short, Short, JVM_SIGNATURE_SHORT, s
2250 , HOTSPOT_JNI_SETSTATICSHORTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value),
2251 HOTSPOT_JNI_SETSTATICSHORTFIELD_RETURN())
2252 DEFINE_SETSTATICFIELD(jint, int, Int, JVM_SIGNATURE_INT, i
2253 , HOTSPOT_JNI_SETSTATICINTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value),
2254 HOTSPOT_JNI_SETSTATICINTFIELD_RETURN())
2255 DEFINE_SETSTATICFIELD(jlong, long, Long, JVM_SIGNATURE_LONG, j
2256 , HOTSPOT_JNI_SETSTATICLONGFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value),
2257 HOTSPOT_JNI_SETSTATICLONGFIELD_RETURN())
2258 // Float and double probes don't return value because dtrace doesn't currently support it
2259 DEFINE_SETSTATICFIELD(jfloat, float, Float, JVM_SIGNATURE_FLOAT, f
2260 , HOTSPOT_JNI_SETSTATICFLOATFIELD_ENTRY(env, clazz, (uintptr_t) fieldID),
2261 HOTSPOT_JNI_SETSTATICFLOATFIELD_RETURN())
2262 DEFINE_SETSTATICFIELD(jdouble, double, Double, JVM_SIGNATURE_DOUBLE, d
2263 , HOTSPOT_JNI_SETSTATICDOUBLEFIELD_ENTRY(env, clazz, (uintptr_t) fieldID),
2264 HOTSPOT_JNI_SETSTATICDOUBLEFIELD_RETURN())
2265
2266 //
2267 // String Operations
2268 //
2269
2270 // Unicode Interface
2271
2272 DT_RETURN_MARK_DECL(NewString, jstring
2273 , HOTSPOT_JNI_NEWSTRING_RETURN(_ret_ref));
2274
2275 JNI_ENTRY(jstring, jni_NewString(JNIEnv *env, const jchar *unicodeChars, jsize len))
2276 JNIWrapper("NewString");
2277 HOTSPOT_JNI_NEWSTRING_ENTRY(env, (uint16_t *) unicodeChars, len);
2278 jstring ret = NULL;
2279 DT_RETURN_MARK(NewString, jstring, (const jstring&)ret);
2280 oop string=java_lang_String::create_oop_from_unicode((jchar*) unicodeChars, len, CHECK_NULL);
2281 ret = (jstring) JNIHandles::make_local(THREAD, string);
2282 return ret;
2283 JNI_END
2284
2285
2286 JNI_ENTRY_NO_PRESERVE(jsize, jni_GetStringLength(JNIEnv *env, jstring string))
2287 JNIWrapper("GetStringLength");
2288 HOTSPOT_JNI_GETSTRINGLENGTH_ENTRY(env, string);
2289 jsize ret = 0;
2290 oop s = JNIHandles::resolve_non_null(string);
2291 ret = java_lang_String::length(s);
2292 HOTSPOT_JNI_GETSTRINGLENGTH_RETURN(ret);
2293 return ret;
2294 JNI_END
2295
2296
2297 JNI_ENTRY_NO_PRESERVE(const jchar*, jni_GetStringChars(
2298 JNIEnv *env, jstring string, jboolean *isCopy))
2299 JNIWrapper("GetStringChars");
2300 HOTSPOT_JNI_GETSTRINGCHARS_ENTRY(env, string, (uintptr_t *) isCopy);
2301 jchar* buf = NULL;
2302 oop s = JNIHandles::resolve_non_null(string);
2303 typeArrayOop s_value = java_lang_String::value(s);
2304 if (s_value != NULL) {
2305 int s_len = java_lang_String::length(s, s_value);
2306 bool is_latin1 = java_lang_String::is_latin1(s);
2307 buf = NEW_C_HEAP_ARRAY_RETURN_NULL(jchar, s_len + 1, mtInternal); // add one for zero termination
2308 /* JNI Specification states return NULL on OOM */
2309 if (buf != NULL) {
2310 if (s_len > 0) {
2311 if (!is_latin1) {
2312 ArrayAccess<>::arraycopy_to_native(s_value, (size_t) typeArrayOopDesc::element_offset<jchar>(0),
2313 buf, s_len);
2314 } else {
2315 for (int i = 0; i < s_len; i++) {
2316 buf[i] = ((jchar) s_value->byte_at(i)) & 0xff;
2317 }
2318 }
2319 }
2320 buf[s_len] = 0;
2321 //%note jni_5
2322 if (isCopy != NULL) {
2323 *isCopy = JNI_TRUE;
2324 }
2325 }
2326 }
2327 HOTSPOT_JNI_GETSTRINGCHARS_RETURN(buf);
2328 return buf;
2329 JNI_END
2330
2331
2332 JNI_ENTRY_NO_PRESERVE(void, jni_ReleaseStringChars(JNIEnv *env, jstring str, const jchar *chars))
2333 JNIWrapper("ReleaseStringChars");
2334 HOTSPOT_JNI_RELEASESTRINGCHARS_ENTRY(env, str, (uint16_t *) chars);
2335 //%note jni_6
2336 if (chars != NULL) {
2337 // Since String objects are supposed to be immutable, don't copy any
2338 // new data back. A bad user will have to go after the char array.
2339 FreeHeap((void*) chars);
2340 }
2341 HOTSPOT_JNI_RELEASESTRINGCHARS_RETURN();
2342 JNI_END
2343
2344
2345 // UTF Interface
2346
2347 DT_RETURN_MARK_DECL(NewStringUTF, jstring
2348 , HOTSPOT_JNI_NEWSTRINGUTF_RETURN(_ret_ref));
2349
2350 JNI_ENTRY(jstring, jni_NewStringUTF(JNIEnv *env, const char *bytes))
2351 JNIWrapper("NewStringUTF");
2352 HOTSPOT_JNI_NEWSTRINGUTF_ENTRY(env, (char *) bytes);
2353 jstring ret;
2354 DT_RETURN_MARK(NewStringUTF, jstring, (const jstring&)ret);
2355
2356 oop result = java_lang_String::create_oop_from_str((char*) bytes, CHECK_NULL);
2357 ret = (jstring) JNIHandles::make_local(THREAD, result);
2358 return ret;
2359 JNI_END
2360
2361
2362 JNI_ENTRY(jsize, jni_GetStringUTFLength(JNIEnv *env, jstring string))
2363 JNIWrapper("GetStringUTFLength");
2364 HOTSPOT_JNI_GETSTRINGUTFLENGTH_ENTRY(env, string);
2365 oop java_string = JNIHandles::resolve_non_null(string);
2366 jsize ret = java_lang_String::utf8_length(java_string);
2367 HOTSPOT_JNI_GETSTRINGUTFLENGTH_RETURN(ret);
2368 return ret;
2369 JNI_END
2370
2371
2372 JNI_ENTRY(const char*, jni_GetStringUTFChars(JNIEnv *env, jstring string, jboolean *isCopy))
2373 JNIWrapper("GetStringUTFChars");
2374 HOTSPOT_JNI_GETSTRINGUTFCHARS_ENTRY(env, string, (uintptr_t *) isCopy);
2375 char* result = NULL;
2376 oop java_string = JNIHandles::resolve_non_null(string);
2377 typeArrayOop s_value = java_lang_String::value(java_string);
2378 if (s_value != NULL) {
2379 size_t length = java_lang_String::utf8_length(java_string, s_value);
2380 /* JNI Specification states return NULL on OOM */
2381 result = AllocateHeap(length + 1, mtInternal, 0, AllocFailStrategy::RETURN_NULL);
2382 if (result != NULL) {
2383 java_lang_String::as_utf8_string(java_string, s_value, result, (int) length + 1);
2384 if (isCopy != NULL) {
2385 *isCopy = JNI_TRUE;
2386 }
2387 }
2388 }
2389 HOTSPOT_JNI_GETSTRINGUTFCHARS_RETURN(result);
2390 return result;
2391 JNI_END
2392
2393
2394 JNI_LEAF(void, jni_ReleaseStringUTFChars(JNIEnv *env, jstring str, const char *chars))
2395 JNIWrapper("ReleaseStringUTFChars");
2396 HOTSPOT_JNI_RELEASESTRINGUTFCHARS_ENTRY(env, str, (char *) chars);
2397 if (chars != NULL) {
2398 FreeHeap((char*) chars);
2399 }
2400 HOTSPOT_JNI_RELEASESTRINGUTFCHARS_RETURN();
2401 JNI_END
2402
2403
2404 JNI_ENTRY_NO_PRESERVE(jsize, jni_GetArrayLength(JNIEnv *env, jarray array))
2405 JNIWrapper("GetArrayLength");
2406 HOTSPOT_JNI_GETARRAYLENGTH_ENTRY(env, array);
2407 arrayOop a = arrayOop(JNIHandles::resolve_non_null(array));
2408 assert(a->is_array(), "must be array");
2409 jsize ret = a->length();
2410 HOTSPOT_JNI_GETARRAYLENGTH_RETURN(ret);
2411 return ret;
2412 JNI_END
2413
2414
2415 //
2416 // Object Array Operations
2417 //
2418
2419 DT_RETURN_MARK_DECL(NewObjectArray, jobjectArray
2420 , HOTSPOT_JNI_NEWOBJECTARRAY_RETURN(_ret_ref));
2421
2422 JNI_ENTRY(jobjectArray, jni_NewObjectArray(JNIEnv *env, jsize length, jclass elementClass, jobject initialElement))
2423 JNIWrapper("NewObjectArray");
2424 HOTSPOT_JNI_NEWOBJECTARRAY_ENTRY(env, length, elementClass, initialElement);
2425 jobjectArray ret = NULL;
2426 DT_RETURN_MARK(NewObjectArray, jobjectArray, (const jobjectArray&)ret);
2427 Klass* ek = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(elementClass));
2428 Klass* ak = ek->array_klass(CHECK_NULL);
2429 ObjArrayKlass::cast(ak)->initialize(CHECK_NULL);
2430 objArrayOop result = ObjArrayKlass::cast(ak)->allocate(length, CHECK_NULL);
2431 oop initial_value = JNIHandles::resolve(initialElement);
2432 if (initial_value != NULL) { // array already initialized with NULL
2433 for (int index = 0; index < length; index++) {
2434 result->obj_at_put(index, initial_value);
2435 }
2436 }
2437 ret = (jobjectArray) JNIHandles::make_local(THREAD, result);
2438 return ret;
2439 JNI_END
2440
2441 DT_RETURN_MARK_DECL(GetObjectArrayElement, jobject
2442 , HOTSPOT_JNI_GETOBJECTARRAYELEMENT_RETURN(_ret_ref));
2443
2444 JNI_ENTRY(jobject, jni_GetObjectArrayElement(JNIEnv *env, jobjectArray array, jsize index))
2445 JNIWrapper("GetObjectArrayElement");
2446 HOTSPOT_JNI_GETOBJECTARRAYELEMENT_ENTRY(env, array, index);
2447 jobject ret = NULL;
2448 DT_RETURN_MARK(GetObjectArrayElement, jobject, (const jobject&)ret);
2449 objArrayOop a = objArrayOop(JNIHandles::resolve_non_null(array));
2450 if (a->is_within_bounds(index)) {
2451 ret = JNIHandles::make_local(THREAD, a->obj_at(index));
2452 return ret;
2453 } else {
2454 ResourceMark rm(THREAD);
2455 stringStream ss;
2456 ss.print("Index %d out of bounds for length %d", index, a->length());
2457 THROW_MSG_0(vmSymbols::java_lang_ArrayIndexOutOfBoundsException(), ss.as_string());
2458 }
2459 JNI_END
2460
2461 DT_VOID_RETURN_MARK_DECL(SetObjectArrayElement
2462 , HOTSPOT_JNI_SETOBJECTARRAYELEMENT_RETURN());
2463
2464 JNI_ENTRY(void, jni_SetObjectArrayElement(JNIEnv *env, jobjectArray array, jsize index, jobject value))
2465 JNIWrapper("SetObjectArrayElement");
2466 HOTSPOT_JNI_SETOBJECTARRAYELEMENT_ENTRY(env, array, index, value);
2467 DT_VOID_RETURN_MARK(SetObjectArrayElement);
2468
2469 objArrayOop a = objArrayOop(JNIHandles::resolve_non_null(array));
2470 oop v = JNIHandles::resolve(value);
2471 if (a->is_within_bounds(index)) {
2472 if (v == NULL || v->is_a(ObjArrayKlass::cast(a->klass())->element_klass())) {
2473 a->obj_at_put(index, v);
2474 } else {
2475 ResourceMark rm(THREAD);
2476 stringStream ss;
2477 Klass *bottom_kl = ObjArrayKlass::cast(a->klass())->bottom_klass();
2478 ss.print("type mismatch: can not store %s to %s[%d]",
2479 v->klass()->external_name(),
2480 bottom_kl->is_typeArray_klass() ? type2name_tab[ArrayKlass::cast(bottom_kl)->element_type()] : bottom_kl->external_name(),
2481 index);
2482 for (int dims = ArrayKlass::cast(a->klass())->dimension(); dims > 1; --dims) {
2483 ss.print("[]");
2484 }
2485 THROW_MSG(vmSymbols::java_lang_ArrayStoreException(), ss.as_string());
2486 }
2487 } else {
2488 ResourceMark rm(THREAD);
2489 stringStream ss;
2490 ss.print("Index %d out of bounds for length %d", index, a->length());
2491 THROW_MSG(vmSymbols::java_lang_ArrayIndexOutOfBoundsException(), ss.as_string());
2492 }
2493 JNI_END
2494
2495
2496
2497 #define DEFINE_NEWSCALARARRAY(Return,Allocator,Result \
2498 ,EntryProbe,ReturnProbe) \
2499 \
2500 DT_RETURN_MARK_DECL(New##Result##Array, Return \
2501 , ReturnProbe); \
2502 \
2503 JNI_ENTRY(Return, \
2504 jni_New##Result##Array(JNIEnv *env, jsize len)) \
2505 JNIWrapper("New" XSTR(Result) "Array"); \
2506 EntryProbe; \
2507 Return ret = NULL;\
2508 DT_RETURN_MARK(New##Result##Array, Return, (const Return&)ret);\
2509 \
2510 oop obj= oopFactory::Allocator(len, CHECK_NULL); \
2511 ret = (Return) JNIHandles::make_local(THREAD, obj); \
2512 return ret;\
2513 JNI_END
2514
2515 DEFINE_NEWSCALARARRAY(jbooleanArray, new_boolArray, Boolean,
2516 HOTSPOT_JNI_NEWBOOLEANARRAY_ENTRY(env, len),
2517 HOTSPOT_JNI_NEWBOOLEANARRAY_RETURN(_ret_ref))
2518 DEFINE_NEWSCALARARRAY(jbyteArray, new_byteArray, Byte,
2519 HOTSPOT_JNI_NEWBYTEARRAY_ENTRY(env, len),
2520 HOTSPOT_JNI_NEWBYTEARRAY_RETURN(_ret_ref))
2521 DEFINE_NEWSCALARARRAY(jshortArray, new_shortArray, Short,
2522 HOTSPOT_JNI_NEWSHORTARRAY_ENTRY(env, len),
2523 HOTSPOT_JNI_NEWSHORTARRAY_RETURN(_ret_ref))
2524 DEFINE_NEWSCALARARRAY(jcharArray, new_charArray, Char,
2525 HOTSPOT_JNI_NEWCHARARRAY_ENTRY(env, len),
2526 HOTSPOT_JNI_NEWCHARARRAY_RETURN(_ret_ref))
2527 DEFINE_NEWSCALARARRAY(jintArray, new_intArray, Int,
2528 HOTSPOT_JNI_NEWINTARRAY_ENTRY(env, len),
2529 HOTSPOT_JNI_NEWINTARRAY_RETURN(_ret_ref))
2530 DEFINE_NEWSCALARARRAY(jlongArray, new_longArray, Long,
2531 HOTSPOT_JNI_NEWLONGARRAY_ENTRY(env, len),
2532 HOTSPOT_JNI_NEWLONGARRAY_RETURN(_ret_ref))
2533 DEFINE_NEWSCALARARRAY(jfloatArray, new_floatArray, Float,
2534 HOTSPOT_JNI_NEWFLOATARRAY_ENTRY(env, len),
2535 HOTSPOT_JNI_NEWFLOATARRAY_RETURN(_ret_ref))
2536 DEFINE_NEWSCALARARRAY(jdoubleArray, new_doubleArray, Double,
2537 HOTSPOT_JNI_NEWDOUBLEARRAY_ENTRY(env, len),
2538 HOTSPOT_JNI_NEWDOUBLEARRAY_RETURN(_ret_ref))
2539
2540 // Return an address which will fault if the caller writes to it.
2541
2542 static char* get_bad_address() {
2543 static char* bad_address = NULL;
2544 if (bad_address == NULL) {
2545 size_t size = os::vm_allocation_granularity();
2546 bad_address = os::reserve_memory(size);
2547 if (bad_address != NULL) {
2548 os::protect_memory(bad_address, size, os::MEM_PROT_READ,
2549 /*is_committed*/false);
2550 MemTracker::record_virtual_memory_type((void*)bad_address, mtInternal);
2551 }
2552 }
2553 return bad_address;
2554 }
2555
2556
2557
2558 #define DEFINE_GETSCALARARRAYELEMENTS(ElementTag,ElementType,Result, Tag \
2559 , EntryProbe, ReturnProbe) \
2560 \
2561 JNI_ENTRY_NO_PRESERVE(ElementType*, \
2562 jni_Get##Result##ArrayElements(JNIEnv *env, ElementType##Array array, jboolean *isCopy)) \
2563 JNIWrapper("Get" XSTR(Result) "ArrayElements"); \
2564 EntryProbe; \
2565 /* allocate an chunk of memory in c land */ \
2566 typeArrayOop a = typeArrayOop(JNIHandles::resolve_non_null(array)); \
2567 ElementType* result; \
2568 int len = a->length(); \
2569 if (len == 0) { \
2570 if (isCopy != NULL) { \
2571 *isCopy = JNI_FALSE; \
2572 } \
2573 /* Empty array: legal but useless, can't return NULL. \
2574 * Return a pointer to something useless. \
2575 * Avoid asserts in typeArrayOop. */ \
2576 result = (ElementType*)get_bad_address(); \
2577 } else { \
2578 /* JNI Specification states return NULL on OOM */ \
2579 result = NEW_C_HEAP_ARRAY_RETURN_NULL(ElementType, len, mtInternal); \
2580 if (result != NULL) { \
2581 /* copy the array to the c chunk */ \
2582 ArrayAccess<>::arraycopy_to_native(a, typeArrayOopDesc::element_offset<ElementType>(0), \
2583 result, len); \
2584 if (isCopy) { \
2585 *isCopy = JNI_TRUE; \
2586 } \
2587 } \
2588 } \
2589 ReturnProbe; \
2590 return result; \
2591 JNI_END
2592
2593 DEFINE_GETSCALARARRAYELEMENTS(T_BOOLEAN, jboolean, Boolean, bool
2594 , HOTSPOT_JNI_GETBOOLEANARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy),
2595 HOTSPOT_JNI_GETBOOLEANARRAYELEMENTS_RETURN((uintptr_t*)result))
2596 DEFINE_GETSCALARARRAYELEMENTS(T_BYTE, jbyte, Byte, byte
2597 , HOTSPOT_JNI_GETBYTEARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy),
2598 HOTSPOT_JNI_GETBYTEARRAYELEMENTS_RETURN((char*)result))
2599 DEFINE_GETSCALARARRAYELEMENTS(T_SHORT, jshort, Short, short
2600 , HOTSPOT_JNI_GETSHORTARRAYELEMENTS_ENTRY(env, (uint16_t*) array, (uintptr_t *) isCopy),
2601 HOTSPOT_JNI_GETSHORTARRAYELEMENTS_RETURN((uint16_t*)result))
2602 DEFINE_GETSCALARARRAYELEMENTS(T_CHAR, jchar, Char, char
2603 , HOTSPOT_JNI_GETCHARARRAYELEMENTS_ENTRY(env, (uint16_t*) array, (uintptr_t *) isCopy),
2604 HOTSPOT_JNI_GETCHARARRAYELEMENTS_RETURN(result))
2605 DEFINE_GETSCALARARRAYELEMENTS(T_INT, jint, Int, int
2606 , HOTSPOT_JNI_GETINTARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy),
2607 HOTSPOT_JNI_GETINTARRAYELEMENTS_RETURN((uint32_t*)result))
2608 DEFINE_GETSCALARARRAYELEMENTS(T_LONG, jlong, Long, long
2609 , HOTSPOT_JNI_GETLONGARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy),
2610 HOTSPOT_JNI_GETLONGARRAYELEMENTS_RETURN(((uintptr_t*)result)))
2611 // Float and double probes don't return value because dtrace doesn't currently support it
2612 DEFINE_GETSCALARARRAYELEMENTS(T_FLOAT, jfloat, Float, float
2613 , HOTSPOT_JNI_GETFLOATARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy),
2614 HOTSPOT_JNI_GETFLOATARRAYELEMENTS_RETURN(result))
2615 DEFINE_GETSCALARARRAYELEMENTS(T_DOUBLE, jdouble, Double, double
2616 , HOTSPOT_JNI_GETDOUBLEARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy),
2617 HOTSPOT_JNI_GETDOUBLEARRAYELEMENTS_RETURN(result))
2618
2619
2620 #define DEFINE_RELEASESCALARARRAYELEMENTS(ElementTag,ElementType,Result,Tag \
2621 , EntryProbe, ReturnProbe);\
2622 \
2623 JNI_ENTRY_NO_PRESERVE(void, \
2624 jni_Release##Result##ArrayElements(JNIEnv *env, ElementType##Array array, \
2625 ElementType *buf, jint mode)) \
2626 JNIWrapper("Release" XSTR(Result) "ArrayElements"); \
2627 EntryProbe; \
2628 typeArrayOop a = typeArrayOop(JNIHandles::resolve_non_null(array)); \
2629 int len = a->length(); \
2630 if (len != 0) { /* Empty array: nothing to free or copy. */ \
2631 if ((mode == 0) || (mode == JNI_COMMIT)) { \
2632 ArrayAccess<>::arraycopy_from_native(buf, a, typeArrayOopDesc::element_offset<ElementType>(0), len); \
2633 } \
2634 if ((mode == 0) || (mode == JNI_ABORT)) { \
2635 FreeHeap(buf); \
2636 } \
2637 } \
2638 ReturnProbe; \
2639 JNI_END
2640
2641 DEFINE_RELEASESCALARARRAYELEMENTS(T_BOOLEAN, jboolean, Boolean, bool
2642 , HOTSPOT_JNI_RELEASEBOOLEANARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) buf, mode),
2643 HOTSPOT_JNI_RELEASEBOOLEANARRAYELEMENTS_RETURN())
2644 DEFINE_RELEASESCALARARRAYELEMENTS(T_BYTE, jbyte, Byte, byte
2645 , HOTSPOT_JNI_RELEASEBYTEARRAYELEMENTS_ENTRY(env, array, (char *) buf, mode),
2646 HOTSPOT_JNI_RELEASEBYTEARRAYELEMENTS_RETURN())
2647 DEFINE_RELEASESCALARARRAYELEMENTS(T_SHORT, jshort, Short, short
2648 , HOTSPOT_JNI_RELEASESHORTARRAYELEMENTS_ENTRY(env, array, (uint16_t *) buf, mode),
2649 HOTSPOT_JNI_RELEASESHORTARRAYELEMENTS_RETURN())
2650 DEFINE_RELEASESCALARARRAYELEMENTS(T_CHAR, jchar, Char, char
2651 , HOTSPOT_JNI_RELEASECHARARRAYELEMENTS_ENTRY(env, array, (uint16_t *) buf, mode),
2652 HOTSPOT_JNI_RELEASECHARARRAYELEMENTS_RETURN())
2653 DEFINE_RELEASESCALARARRAYELEMENTS(T_INT, jint, Int, int
2654 , HOTSPOT_JNI_RELEASEINTARRAYELEMENTS_ENTRY(env, array, (uint32_t *) buf, mode),
2655 HOTSPOT_JNI_RELEASEINTARRAYELEMENTS_RETURN())
2656 DEFINE_RELEASESCALARARRAYELEMENTS(T_LONG, jlong, Long, long
2657 , HOTSPOT_JNI_RELEASELONGARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) buf, mode),
2658 HOTSPOT_JNI_RELEASELONGARRAYELEMENTS_RETURN())
2659 DEFINE_RELEASESCALARARRAYELEMENTS(T_FLOAT, jfloat, Float, float
2660 , HOTSPOT_JNI_RELEASEFLOATARRAYELEMENTS_ENTRY(env, array, (float *) buf, mode),
2661 HOTSPOT_JNI_RELEASEFLOATARRAYELEMENTS_RETURN())
2662 DEFINE_RELEASESCALARARRAYELEMENTS(T_DOUBLE, jdouble, Double, double
2663 , HOTSPOT_JNI_RELEASEDOUBLEARRAYELEMENTS_ENTRY(env, array, (double *) buf, mode),
2664 HOTSPOT_JNI_RELEASEDOUBLEARRAYELEMENTS_RETURN())
2665
2666 static void check_bounds(jsize start, jsize copy_len, jsize array_len, TRAPS) {
2667 ResourceMark rm(THREAD);
2668 if (copy_len < 0) {
2669 stringStream ss;
2670 ss.print("Length %d is negative", copy_len);
2671 THROW_MSG(vmSymbols::java_lang_ArrayIndexOutOfBoundsException(), ss.as_string());
2672 } else if (start < 0 || (start > array_len - copy_len)) {
2673 stringStream ss;
2674 ss.print("Array region %d.." INT64_FORMAT " out of bounds for length %d",
2675 start, (int64_t)start+(int64_t)copy_len, array_len);
2676 THROW_MSG(vmSymbols::java_lang_ArrayIndexOutOfBoundsException(), ss.as_string());
2677 }
2678 }
2679
2680 #define DEFINE_GETSCALARARRAYREGION(ElementTag,ElementType,Result, Tag \
2681 , EntryProbe, ReturnProbe); \
2682 DT_VOID_RETURN_MARK_DECL(Get##Result##ArrayRegion \
2683 , ReturnProbe); \
2684 \
2685 JNI_ENTRY(void, \
2686 jni_Get##Result##ArrayRegion(JNIEnv *env, ElementType##Array array, jsize start, \
2687 jsize len, ElementType *buf)) \
2688 JNIWrapper("Get" XSTR(Result) "ArrayRegion"); \
2689 EntryProbe; \
2690 DT_VOID_RETURN_MARK(Get##Result##ArrayRegion); \
2691 typeArrayOop src = typeArrayOop(JNIHandles::resolve_non_null(array)); \
2692 check_bounds(start, len, src->length(), CHECK); \
2693 if (len > 0) { \
2694 ArrayAccess<>::arraycopy_to_native(src, typeArrayOopDesc::element_offset<ElementType>(start), buf, len); \
2695 } \
2696 JNI_END
2697
2698 DEFINE_GETSCALARARRAYREGION(T_BOOLEAN, jboolean,Boolean, bool
2699 , HOTSPOT_JNI_GETBOOLEANARRAYREGION_ENTRY(env, array, start, len, (uintptr_t *) buf),
2700 HOTSPOT_JNI_GETBOOLEANARRAYREGION_RETURN());
2701 DEFINE_GETSCALARARRAYREGION(T_BYTE, jbyte, Byte, byte
2702 , HOTSPOT_JNI_GETBYTEARRAYREGION_ENTRY(env, array, start, len, (char *) buf),
2703 HOTSPOT_JNI_GETBYTEARRAYREGION_RETURN());
2704 DEFINE_GETSCALARARRAYREGION(T_SHORT, jshort, Short, short
2705 , HOTSPOT_JNI_GETSHORTARRAYREGION_ENTRY(env, array, start, len, (uint16_t *) buf),
2706 HOTSPOT_JNI_GETSHORTARRAYREGION_RETURN());
2707 DEFINE_GETSCALARARRAYREGION(T_CHAR, jchar, Char, char
2708 , HOTSPOT_JNI_GETCHARARRAYREGION_ENTRY(env, array, start, len, (uint16_t*) buf),
2709 HOTSPOT_JNI_GETCHARARRAYREGION_RETURN());
2710 DEFINE_GETSCALARARRAYREGION(T_INT, jint, Int, int
2711 , HOTSPOT_JNI_GETINTARRAYREGION_ENTRY(env, array, start, len, (uint32_t*) buf),
2712 HOTSPOT_JNI_GETINTARRAYREGION_RETURN());
2713 DEFINE_GETSCALARARRAYREGION(T_LONG, jlong, Long, long
2714 , HOTSPOT_JNI_GETLONGARRAYREGION_ENTRY(env, array, start, len, (uintptr_t *) buf),
2715 HOTSPOT_JNI_GETLONGARRAYREGION_RETURN());
2716 DEFINE_GETSCALARARRAYREGION(T_FLOAT, jfloat, Float, float
2717 , HOTSPOT_JNI_GETFLOATARRAYREGION_ENTRY(env, array, start, len, (float *) buf),
2718 HOTSPOT_JNI_GETFLOATARRAYREGION_RETURN());
2719 DEFINE_GETSCALARARRAYREGION(T_DOUBLE, jdouble, Double, double
2720 , HOTSPOT_JNI_GETDOUBLEARRAYREGION_ENTRY(env, array, start, len, (double *) buf),
2721 HOTSPOT_JNI_GETDOUBLEARRAYREGION_RETURN());
2722
2723
2724 #define DEFINE_SETSCALARARRAYREGION(ElementTag,ElementType,Result, Tag \
2725 , EntryProbe, ReturnProbe); \
2726 DT_VOID_RETURN_MARK_DECL(Set##Result##ArrayRegion \
2727 ,ReturnProbe); \
2728 \
2729 JNI_ENTRY(void, \
2730 jni_Set##Result##ArrayRegion(JNIEnv *env, ElementType##Array array, jsize start, \
2731 jsize len, const ElementType *buf)) \
2732 JNIWrapper("Set" XSTR(Result) "ArrayRegion"); \
2733 EntryProbe; \
2734 DT_VOID_RETURN_MARK(Set##Result##ArrayRegion); \
2735 typeArrayOop dst = typeArrayOop(JNIHandles::resolve_non_null(array)); \
2736 check_bounds(start, len, dst->length(), CHECK); \
2737 if (len > 0) { \
2738 ArrayAccess<>::arraycopy_from_native(buf, dst, typeArrayOopDesc::element_offset<ElementType>(start), len); \
2739 } \
2740 JNI_END
2741
2742 DEFINE_SETSCALARARRAYREGION(T_BOOLEAN, jboolean, Boolean, bool
2743 , HOTSPOT_JNI_SETBOOLEANARRAYREGION_ENTRY(env, array, start, len, (uintptr_t *)buf),
2744 HOTSPOT_JNI_SETBOOLEANARRAYREGION_RETURN())
2745 DEFINE_SETSCALARARRAYREGION(T_BYTE, jbyte, Byte, byte
2746 , HOTSPOT_JNI_SETBYTEARRAYREGION_ENTRY(env, array, start, len, (char *) buf),
2747 HOTSPOT_JNI_SETBYTEARRAYREGION_RETURN())
2748 DEFINE_SETSCALARARRAYREGION(T_SHORT, jshort, Short, short
2749 , HOTSPOT_JNI_SETSHORTARRAYREGION_ENTRY(env, array, start, len, (uint16_t *) buf),
2750 HOTSPOT_JNI_SETSHORTARRAYREGION_RETURN())
2751 DEFINE_SETSCALARARRAYREGION(T_CHAR, jchar, Char, char
2752 , HOTSPOT_JNI_SETCHARARRAYREGION_ENTRY(env, array, start, len, (uint16_t *) buf),
2753 HOTSPOT_JNI_SETCHARARRAYREGION_RETURN())
2754 DEFINE_SETSCALARARRAYREGION(T_INT, jint, Int, int
2755 , HOTSPOT_JNI_SETINTARRAYREGION_ENTRY(env, array, start, len, (uint32_t *) buf),
2756 HOTSPOT_JNI_SETINTARRAYREGION_RETURN())
2757 DEFINE_SETSCALARARRAYREGION(T_LONG, jlong, Long, long
2758 , HOTSPOT_JNI_SETLONGARRAYREGION_ENTRY(env, array, start, len, (uintptr_t *) buf),
2759 HOTSPOT_JNI_SETLONGARRAYREGION_RETURN())
2760 DEFINE_SETSCALARARRAYREGION(T_FLOAT, jfloat, Float, float
2761 , HOTSPOT_JNI_SETFLOATARRAYREGION_ENTRY(env, array, start, len, (float *) buf),
2762 HOTSPOT_JNI_SETFLOATARRAYREGION_RETURN())
2763 DEFINE_SETSCALARARRAYREGION(T_DOUBLE, jdouble, Double, double
2764 , HOTSPOT_JNI_SETDOUBLEARRAYREGION_ENTRY(env, array, start, len, (double *) buf),
2765 HOTSPOT_JNI_SETDOUBLEARRAYREGION_RETURN())
2766
2767
2768 DT_RETURN_MARK_DECL(RegisterNatives, jint
2769 , HOTSPOT_JNI_REGISTERNATIVES_RETURN(_ret_ref));
2770
2771 JNI_ENTRY(jint, jni_RegisterNatives(JNIEnv *env, jclass clazz,
2772 const JNINativeMethod *methods,
2773 jint nMethods))
2774 JNIWrapper("RegisterNatives");
2775 HOTSPOT_JNI_REGISTERNATIVES_ENTRY(env, clazz, (void *) methods, nMethods);
2776 jint ret = 0;
2777 DT_RETURN_MARK(RegisterNatives, jint, (const jint&)ret);
2778
2779 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz));
2780
2781 // There are no restrictions on native code registering native methods,
2782 // which allows agents to redefine the bindings to native methods, however
2783 // we issue a warning if any code running outside of the boot/platform
2784 // loader is rebinding any native methods in classes loaded by the
2785 // boot/platform loader that are in named modules. That will catch changes
2786 // to platform classes while excluding classes added to the bootclasspath.
2787 bool do_warning = false;
2788
2789 // Only instanceKlasses can have native methods
2790 if (k->is_instance_klass()) {
2791 oop cl = k->class_loader();
2792 InstanceKlass* ik = InstanceKlass::cast(k);
2793 // Check for a platform class
2794 if ((cl == NULL || SystemDictionary::is_platform_class_loader(cl)) &&
2795 ik->module()->is_named()) {
2796 Klass* caller = thread->security_get_caller_class(1);
2797 // If no caller class, or caller class has a different loader, then
2798 // issue a warning below.
2799 do_warning = (caller == NULL) || caller->class_loader() != cl;
2800 }
2801 }
2802
2803
2804 for (int index = 0; index < nMethods; index++) {
2805 const char* meth_name = methods[index].name;
2806 const char* meth_sig = methods[index].signature;
2807 int meth_name_len = (int)strlen(meth_name);
2808
2809 // The class should have been loaded (we have an instance of the class
2810 // passed in) so the method and signature should already be in the symbol
2811 // table. If they're not there, the method doesn't exist.
2812 TempNewSymbol name = SymbolTable::probe(meth_name, meth_name_len);
2813 TempNewSymbol signature = SymbolTable::probe(meth_sig, (int)strlen(meth_sig));
2814
2815 if (name == NULL || signature == NULL) {
2816 ResourceMark rm(THREAD);
2817 stringStream st;
2818 st.print("Method %s.%s%s not found", k->external_name(), meth_name, meth_sig);
2819 // Must return negative value on failure
2820 THROW_MSG_(vmSymbols::java_lang_NoSuchMethodError(), st.as_string(), -1);
2821 }
2822
2823 if (do_warning) {
2824 ResourceMark rm(THREAD);
2825 log_warning(jni, resolve)("Re-registering of platform native method: %s.%s%s "
2826 "from code in a different classloader", k->external_name(), meth_name, meth_sig);
2827 }
2828
2829 bool res = Method::register_native(k, name, signature,
2830 (address) methods[index].fnPtr, THREAD);
2831 if (!res) {
2832 ret = -1;
2833 break;
2834 }
2835 }
2836 return ret;
2837 JNI_END
2838
2839
2840 JNI_ENTRY(jint, jni_UnregisterNatives(JNIEnv *env, jclass clazz))
2841 JNIWrapper("UnregisterNatives");
2842 HOTSPOT_JNI_UNREGISTERNATIVES_ENTRY(env, clazz);
2843 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz));
2844 //%note jni_2
2845 if (k->is_instance_klass()) {
2846 for (int index = 0; index < InstanceKlass::cast(k)->methods()->length(); index++) {
2847 Method* m = InstanceKlass::cast(k)->methods()->at(index);
2848 if (m->is_native()) {
2849 m->clear_native_function();
2850 m->set_signature_handler(NULL);
2851 }
2852 }
2853 }
2854 HOTSPOT_JNI_UNREGISTERNATIVES_RETURN(0);
2855 return 0;
2856 JNI_END
2857
2858 //
2859 // Monitor functions
2860 //
2861
2862 DT_RETURN_MARK_DECL(MonitorEnter, jint
2863 , HOTSPOT_JNI_MONITORENTER_RETURN(_ret_ref));
2864
2865 JNI_ENTRY(jint, jni_MonitorEnter(JNIEnv *env, jobject jobj))
2866 HOTSPOT_JNI_MONITORENTER_ENTRY(env, jobj);
2867 jint ret = JNI_ERR;
2868 DT_RETURN_MARK(MonitorEnter, jint, (const jint&)ret);
2869
2870 // If the object is null, we can't do anything with it
2871 if (jobj == NULL) {
2872 THROW_(vmSymbols::java_lang_NullPointerException(), JNI_ERR);
2873 }
2874
2875 Handle obj(thread, JNIHandles::resolve_non_null(jobj));
2876 ObjectSynchronizer::jni_enter(obj, CHECK_(JNI_ERR));
2877 ret = JNI_OK;
2878 return ret;
2879 JNI_END
2880
2881 DT_RETURN_MARK_DECL(MonitorExit, jint
2882 , HOTSPOT_JNI_MONITOREXIT_RETURN(_ret_ref));
2883
2884 JNI_ENTRY(jint, jni_MonitorExit(JNIEnv *env, jobject jobj))
2885 HOTSPOT_JNI_MONITOREXIT_ENTRY(env, jobj);
2886 jint ret = JNI_ERR;
2887 DT_RETURN_MARK(MonitorExit, jint, (const jint&)ret);
2888
2889 // Don't do anything with a null object
2890 if (jobj == NULL) {
2891 THROW_(vmSymbols::java_lang_NullPointerException(), JNI_ERR);
2892 }
2893
2894 Handle obj(THREAD, JNIHandles::resolve_non_null(jobj));
2895 ObjectSynchronizer::jni_exit(obj(), CHECK_(JNI_ERR));
2896
2897 ret = JNI_OK;
2898 return ret;
2899 JNI_END
2900
2901 //
2902 // Extensions
2903 //
2904
2905 DT_VOID_RETURN_MARK_DECL(GetStringRegion
2906 , HOTSPOT_JNI_GETSTRINGREGION_RETURN());
2907
2908 JNI_ENTRY(void, jni_GetStringRegion(JNIEnv *env, jstring string, jsize start, jsize len, jchar *buf))
2909 JNIWrapper("GetStringRegion");
2910 HOTSPOT_JNI_GETSTRINGREGION_ENTRY(env, string, start, len, buf);
2911 DT_VOID_RETURN_MARK(GetStringRegion);
2912 oop s = JNIHandles::resolve_non_null(string);
2913 typeArrayOop s_value = java_lang_String::value(s);
2914 int s_len = java_lang_String::length(s, s_value);
2915 if (start < 0 || len < 0 || start > s_len - len) {
2916 THROW(vmSymbols::java_lang_StringIndexOutOfBoundsException());
2917 } else {
2918 if (len > 0) {
2919 bool is_latin1 = java_lang_String::is_latin1(s);
2920 if (!is_latin1) {
2921 ArrayAccess<>::arraycopy_to_native(s_value, typeArrayOopDesc::element_offset<jchar>(start),
2922 buf, len);
2923 } else {
2924 for (int i = 0; i < len; i++) {
2925 buf[i] = ((jchar) s_value->byte_at(i + start)) & 0xff;
2926 }
2927 }
2928 }
2929 }
2930 JNI_END
2931
2932 DT_VOID_RETURN_MARK_DECL(GetStringUTFRegion
2933 , HOTSPOT_JNI_GETSTRINGUTFREGION_RETURN());
2934
2935 JNI_ENTRY(void, jni_GetStringUTFRegion(JNIEnv *env, jstring string, jsize start, jsize len, char *buf))
2936 JNIWrapper("GetStringUTFRegion");
2937 HOTSPOT_JNI_GETSTRINGUTFREGION_ENTRY(env, string, start, len, buf);
2938 DT_VOID_RETURN_MARK(GetStringUTFRegion);
2939 oop s = JNIHandles::resolve_non_null(string);
2940 typeArrayOop s_value = java_lang_String::value(s);
2941 int s_len = java_lang_String::length(s, s_value);
2942 if (start < 0 || len < 0 || start > s_len - len) {
2943 THROW(vmSymbols::java_lang_StringIndexOutOfBoundsException());
2944 } else {
2945 //%note jni_7
2946 if (len > 0) {
2947 // Assume the buffer is large enough as the JNI spec. does not require user error checking
2948 java_lang_String::as_utf8_string(s, s_value, start, len, buf, INT_MAX);
2949 // as_utf8_string null-terminates the result string
2950 } else {
2951 // JDK null-terminates the buffer even in len is zero
2952 if (buf != NULL) {
2953 buf[0] = 0;
2954 }
2955 }
2956 }
2957 JNI_END
2958
2959 static oop lock_gc_or_pin_object(JavaThread* thread, jobject obj) {
2960 if (Universe::heap()->supports_object_pinning()) {
2961 const oop o = JNIHandles::resolve_non_null(obj);
2962 return Universe::heap()->pin_object(thread, o);
2963 } else {
2964 GCLocker::lock_critical(thread);
2965 return JNIHandles::resolve_non_null(obj);
2966 }
2967 }
2968
2969 static void unlock_gc_or_unpin_object(JavaThread* thread, jobject obj) {
2970 if (Universe::heap()->supports_object_pinning()) {
2971 const oop o = JNIHandles::resolve_non_null(obj);
2972 return Universe::heap()->unpin_object(thread, o);
2973 } else {
2974 GCLocker::unlock_critical(thread);
2975 }
2976 }
2977
2978 JNI_ENTRY(void*, jni_GetPrimitiveArrayCritical(JNIEnv *env, jarray array, jboolean *isCopy))
2979 JNIWrapper("GetPrimitiveArrayCritical");
2980 HOTSPOT_JNI_GETPRIMITIVEARRAYCRITICAL_ENTRY(env, array, (uintptr_t *) isCopy);
2981 if (isCopy != NULL) {
2982 *isCopy = JNI_FALSE;
2983 }
2984 oop a = lock_gc_or_pin_object(thread, array);
2985 assert(a->is_array(), "just checking");
2986 BasicType type;
2987 if (a->is_objArray()) {
2988 type = T_OBJECT;
2989 } else {
2990 type = TypeArrayKlass::cast(a->klass())->element_type();
2991 }
2992 void* ret = arrayOop(a)->base(type);
2993 HOTSPOT_JNI_GETPRIMITIVEARRAYCRITICAL_RETURN(ret);
2994 return ret;
2995 JNI_END
2996
2997
2998 JNI_ENTRY(void, jni_ReleasePrimitiveArrayCritical(JNIEnv *env, jarray array, void *carray, jint mode))
2999 JNIWrapper("ReleasePrimitiveArrayCritical");
3000 HOTSPOT_JNI_RELEASEPRIMITIVEARRAYCRITICAL_ENTRY(env, array, carray, mode);
3001 unlock_gc_or_unpin_object(thread, array);
3002 HOTSPOT_JNI_RELEASEPRIMITIVEARRAYCRITICAL_RETURN();
3003 JNI_END
3004
3005
3006 JNI_ENTRY(const jchar*, jni_GetStringCritical(JNIEnv *env, jstring string, jboolean *isCopy))
3007 JNIWrapper("GetStringCritical");
3008 HOTSPOT_JNI_GETSTRINGCRITICAL_ENTRY(env, string, (uintptr_t *) isCopy);
3009 oop s = lock_gc_or_pin_object(thread, string);
3010 typeArrayOop s_value = java_lang_String::value(s);
3011 bool is_latin1 = java_lang_String::is_latin1(s);
3012 if (isCopy != NULL) {
3013 *isCopy = is_latin1 ? JNI_TRUE : JNI_FALSE;
3014 }
3015 jchar* ret;
3016 if (!is_latin1) {
3017 ret = (jchar*) s_value->base(T_CHAR);
3018 } else {
3019 // Inflate latin1 encoded string to UTF16
3020 int s_len = java_lang_String::length(s, s_value);
3021 ret = NEW_C_HEAP_ARRAY_RETURN_NULL(jchar, s_len + 1, mtInternal); // add one for zero termination
3022 /* JNI Specification states return NULL on OOM */
3023 if (ret != NULL) {
3024 for (int i = 0; i < s_len; i++) {
3025 ret[i] = ((jchar) s_value->byte_at(i)) & 0xff;
3026 }
3027 ret[s_len] = 0;
3028 }
3029 }
3030 HOTSPOT_JNI_GETSTRINGCRITICAL_RETURN((uint16_t *) ret);
3031 return ret;
3032 JNI_END
3033
3034
3035 JNI_ENTRY(void, jni_ReleaseStringCritical(JNIEnv *env, jstring str, const jchar *chars))
3036 JNIWrapper("ReleaseStringCritical");
3037 HOTSPOT_JNI_RELEASESTRINGCRITICAL_ENTRY(env, str, (uint16_t *) chars);
3038 // The str and chars arguments are ignored for UTF16 strings
3039 oop s = JNIHandles::resolve_non_null(str);
3040 bool is_latin1 = java_lang_String::is_latin1(s);
3041 if (is_latin1) {
3042 // For latin1 string, free jchar array allocated by earlier call to GetStringCritical.
3043 // This assumes that ReleaseStringCritical bookends GetStringCritical.
3044 FREE_C_HEAP_ARRAY(jchar, chars);
3045 }
3046 unlock_gc_or_unpin_object(thread, str);
3047 HOTSPOT_JNI_RELEASESTRINGCRITICAL_RETURN();
3048 JNI_END
3049
3050
3051 JNI_ENTRY(jweak, jni_NewWeakGlobalRef(JNIEnv *env, jobject ref))
3052 JNIWrapper("jni_NewWeakGlobalRef");
3053 HOTSPOT_JNI_NEWWEAKGLOBALREF_ENTRY(env, ref);
3054 Handle ref_handle(thread, JNIHandles::resolve(ref));
3055 jweak ret = JNIHandles::make_weak_global(ref_handle, AllocFailStrategy::RETURN_NULL);
3056 if (ret == NULL) {
3057 THROW_OOP_(Universe::out_of_memory_error_c_heap(), NULL);
3058 }
3059 HOTSPOT_JNI_NEWWEAKGLOBALREF_RETURN(ret);
3060 return ret;
3061 JNI_END
3062
3063 // Must be JNI_ENTRY (with HandleMark)
3064 JNI_ENTRY(void, jni_DeleteWeakGlobalRef(JNIEnv *env, jweak ref))
3065 JNIWrapper("jni_DeleteWeakGlobalRef");
3066 HOTSPOT_JNI_DELETEWEAKGLOBALREF_ENTRY(env, ref);
3067 JNIHandles::destroy_weak_global(ref);
3068 HOTSPOT_JNI_DELETEWEAKGLOBALREF_RETURN();
3069 JNI_END
3070
3071
3072 JNI_ENTRY_NO_PRESERVE(jboolean, jni_ExceptionCheck(JNIEnv *env))
3073 JNIWrapper("jni_ExceptionCheck");
3074 HOTSPOT_JNI_EXCEPTIONCHECK_ENTRY(env);
3075 jni_check_async_exceptions(thread);
3076 jboolean ret = (thread->has_pending_exception()) ? JNI_TRUE : JNI_FALSE;
3077 HOTSPOT_JNI_EXCEPTIONCHECK_RETURN(ret);
3078 return ret;
3079 JNI_END
3080
3081
3082 // Initialization state for three routines below relating to
3083 // java.nio.DirectBuffers
3084 static int directBufferSupportInitializeStarted = 0;
3085 static volatile int directBufferSupportInitializeEnded = 0;
3086 static volatile int directBufferSupportInitializeFailed = 0;
3087 static jclass bufferClass = NULL;
3088 static jclass directBufferClass = NULL;
3089 static jclass directByteBufferClass = NULL;
3090 static jmethodID directByteBufferConstructor = NULL;
3091 static jfieldID directBufferAddressField = NULL;
3092 static jfieldID bufferCapacityField = NULL;
3093
3094 static jclass lookupOne(JNIEnv* env, const char* name, TRAPS) {
3095 Handle loader; // null (bootstrap) loader
3096 Handle protection_domain; // null protection domain
3097
3098 TempNewSymbol sym = SymbolTable::new_symbol(name);
3099 jclass result = find_class_from_class_loader(env, sym, true, loader, protection_domain, true, CHECK_NULL);
3100
3101 if (log_is_enabled(Debug, class, resolve) && result != NULL) {
3102 trace_class_resolution(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(result)));
3103 }
3104 return result;
3105 }
3106
3107 // These lookups are done with the NULL (bootstrap) ClassLoader to
3108 // circumvent any security checks that would be done by jni_FindClass.
3109 JNI_ENTRY(bool, lookupDirectBufferClasses(JNIEnv* env))
3110 {
3111 if ((bufferClass = lookupOne(env, "java/nio/Buffer", thread)) == NULL) { return false; }
3112 if ((directBufferClass = lookupOne(env, "sun/nio/ch/DirectBuffer", thread)) == NULL) { return false; }
3113 if ((directByteBufferClass = lookupOne(env, "java/nio/DirectByteBuffer", thread)) == NULL) { return false; }
3114 return true;
3115 }
3116 JNI_END
3117
3118
3119 static bool initializeDirectBufferSupport(JNIEnv* env, JavaThread* thread) {
3120 if (directBufferSupportInitializeFailed) {
3121 return false;
3122 }
3123
3124 if (Atomic::cmpxchg(&directBufferSupportInitializeStarted, 0, 1) == 0) {
3125 if (!lookupDirectBufferClasses(env)) {
3126 directBufferSupportInitializeFailed = 1;
3127 return false;
3128 }
3129
3130 // Make global references for these
3131 bufferClass = (jclass) env->NewGlobalRef(bufferClass);
3132 directBufferClass = (jclass) env->NewGlobalRef(directBufferClass);
3133 directByteBufferClass = (jclass) env->NewGlobalRef(directByteBufferClass);
3134
3135 // Global refs will be NULL if out-of-memory (no exception is pending)
3136 if (bufferClass == NULL || directBufferClass == NULL || directByteBufferClass == NULL) {
3137 directBufferSupportInitializeFailed = 1;
3138 return false;
3139 }
3140
3141 // Get needed field and method IDs
3142 directByteBufferConstructor = env->GetMethodID(directByteBufferClass, "<init>", "(JI)V");
3143 if (env->ExceptionCheck()) {
3144 env->ExceptionClear();
3145 directBufferSupportInitializeFailed = 1;
3146 return false;
3147 }
3148 directBufferAddressField = env->GetFieldID(bufferClass, "address", "J");
3149 if (env->ExceptionCheck()) {
3150 env->ExceptionClear();
3151 directBufferSupportInitializeFailed = 1;
3152 return false;
3153 }
3154 bufferCapacityField = env->GetFieldID(bufferClass, "capacity", "I");
3155 if (env->ExceptionCheck()) {
3156 env->ExceptionClear();
3157 directBufferSupportInitializeFailed = 1;
3158 return false;
3159 }
3160
3161 if ((directByteBufferConstructor == NULL) ||
3162 (directBufferAddressField == NULL) ||
3163 (bufferCapacityField == NULL)) {
3164 directBufferSupportInitializeFailed = 1;
3165 return false;
3166 }
3167
3168 directBufferSupportInitializeEnded = 1;
3169 } else {
3170 while (!directBufferSupportInitializeEnded && !directBufferSupportInitializeFailed) {
3171 os::naked_yield();
3172 }
3173 }
3174
3175 return !directBufferSupportInitializeFailed;
3176 }
3177
3178 extern "C" jobject JNICALL jni_NewDirectByteBuffer(JNIEnv *env, void* address, jlong capacity)
3179 {
3180 // thread_from_jni_environment() will block if VM is gone.
3181 JavaThread* thread = JavaThread::thread_from_jni_environment(env);
3182
3183 JNIWrapper("jni_NewDirectByteBuffer");
3184 HOTSPOT_JNI_NEWDIRECTBYTEBUFFER_ENTRY(env, address, capacity);
3185
3186 if (!directBufferSupportInitializeEnded) {
3187 if (!initializeDirectBufferSupport(env, thread)) {
3188 HOTSPOT_JNI_NEWDIRECTBYTEBUFFER_RETURN(NULL);
3189 return NULL;
3190 }
3191 }
3192
3193 // Being paranoid about accidental sign extension on address
3194 jlong addr = (jlong) ((uintptr_t) address);
3195 // NOTE that package-private DirectByteBuffer constructor currently
3196 // takes int capacity
3197 jint cap = (jint) capacity;
3198 jobject ret = env->NewObject(directByteBufferClass, directByteBufferConstructor, addr, cap);
3199 HOTSPOT_JNI_NEWDIRECTBYTEBUFFER_RETURN(ret);
3200 return ret;
3201 }
3202
3203 DT_RETURN_MARK_DECL(GetDirectBufferAddress, void*
3204 , HOTSPOT_JNI_GETDIRECTBUFFERADDRESS_RETURN((void*) _ret_ref));
3205
3206 extern "C" void* JNICALL jni_GetDirectBufferAddress(JNIEnv *env, jobject buf)
3207 {
3208 // thread_from_jni_environment() will block if VM is gone.
3209 JavaThread* thread = JavaThread::thread_from_jni_environment(env);
3210
3211 JNIWrapper("jni_GetDirectBufferAddress");
3212 HOTSPOT_JNI_GETDIRECTBUFFERADDRESS_ENTRY(env, buf);
3213 void* ret = NULL;
3214 DT_RETURN_MARK(GetDirectBufferAddress, void*, (const void*&)ret);
3215
3216 if (!directBufferSupportInitializeEnded) {
3217 if (!initializeDirectBufferSupport(env, thread)) {
3218 return 0;
3219 }
3220 }
3221
3222 if ((buf != NULL) && (!env->IsInstanceOf(buf, directBufferClass))) {
3223 return 0;
3224 }
3225
3226 ret = (void*)(intptr_t)env->GetLongField(buf, directBufferAddressField);
3227 return ret;
3228 }
3229
3230 DT_RETURN_MARK_DECL(GetDirectBufferCapacity, jlong
3231 , HOTSPOT_JNI_GETDIRECTBUFFERCAPACITY_RETURN(_ret_ref));
3232
3233 extern "C" jlong JNICALL jni_GetDirectBufferCapacity(JNIEnv *env, jobject buf)
3234 {
3235 // thread_from_jni_environment() will block if VM is gone.
3236 JavaThread* thread = JavaThread::thread_from_jni_environment(env);
3237
3238 JNIWrapper("jni_GetDirectBufferCapacity");
3239 HOTSPOT_JNI_GETDIRECTBUFFERCAPACITY_ENTRY(env, buf);
3240 jlong ret = -1;
3241 DT_RETURN_MARK(GetDirectBufferCapacity, jlong, (const jlong&)ret);
3242
3243 if (!directBufferSupportInitializeEnded) {
3244 if (!initializeDirectBufferSupport(env, thread)) {
3245 ret = 0;
3246 return ret;
3247 }
3248 }
3249
3250 if (buf == NULL) {
3251 return -1;
3252 }
3253
3254 if (!env->IsInstanceOf(buf, directBufferClass)) {
3255 return -1;
3256 }
3257
3258 // NOTE that capacity is currently an int in the implementation
3259 ret = env->GetIntField(buf, bufferCapacityField);
3260 return ret;
3261 }
3262
3263
3264 JNI_LEAF(jint, jni_GetVersion(JNIEnv *env))
3265 JNIWrapper("GetVersion");
3266 HOTSPOT_JNI_GETVERSION_ENTRY(env);
3267 HOTSPOT_JNI_GETVERSION_RETURN(CurrentVersion);
3268 return CurrentVersion;
3269 JNI_END
3270
3271 extern struct JavaVM_ main_vm;
3272
3273 JNI_LEAF(jint, jni_GetJavaVM(JNIEnv *env, JavaVM **vm))
3274 JNIWrapper("jni_GetJavaVM");
3275 HOTSPOT_JNI_GETJAVAVM_ENTRY(env, (void **) vm);
3276 *vm = (JavaVM *)(&main_vm);
3277 HOTSPOT_JNI_GETJAVAVM_RETURN(JNI_OK);
3278 return JNI_OK;
3279 JNI_END
3280
3281
3282 JNI_ENTRY(jobject, jni_GetModule(JNIEnv* env, jclass clazz))
3283 JNIWrapper("GetModule");
3284 return Modules::get_module(clazz, THREAD);
3285 JNI_END
3286
3287
3288 // Structure containing all jni functions
3289 struct JNINativeInterface_ jni_NativeInterface = {
3290 NULL,
3291 NULL,
3292 NULL,
3293
3294 NULL,
3295
3296 jni_GetVersion,
3297
3298 jni_DefineClass,
3299 jni_FindClass,
3300
3301 jni_FromReflectedMethod,
3302 jni_FromReflectedField,
3303
3304 jni_ToReflectedMethod,
3305
3306 jni_GetSuperclass,
3307 jni_IsAssignableFrom,
3308
3309 jni_ToReflectedField,
3310
3311 jni_Throw,
3312 jni_ThrowNew,
3313 jni_ExceptionOccurred,
3314 jni_ExceptionDescribe,
3315 jni_ExceptionClear,
3316 jni_FatalError,
3317
3318 jni_PushLocalFrame,
3319 jni_PopLocalFrame,
3320
3321 jni_NewGlobalRef,
3322 jni_DeleteGlobalRef,
3323 jni_DeleteLocalRef,
3324 jni_IsSameObject,
3325
3326 jni_NewLocalRef,
3327 jni_EnsureLocalCapacity,
3328
3329 jni_AllocObject,
3330 jni_NewObject,
3331 jni_NewObjectV,
3332 jni_NewObjectA,
3333
3334 jni_GetObjectClass,
3335 jni_IsInstanceOf,
3336
3337 jni_GetMethodID,
3338
3339 jni_CallObjectMethod,
3340 jni_CallObjectMethodV,
3341 jni_CallObjectMethodA,
3342 jni_CallBooleanMethod,
3343 jni_CallBooleanMethodV,
3344 jni_CallBooleanMethodA,
3345 jni_CallByteMethod,
3346 jni_CallByteMethodV,
3347 jni_CallByteMethodA,
3348 jni_CallCharMethod,
3349 jni_CallCharMethodV,
3350 jni_CallCharMethodA,
3351 jni_CallShortMethod,
3352 jni_CallShortMethodV,
3353 jni_CallShortMethodA,
3354 jni_CallIntMethod,
3355 jni_CallIntMethodV,
3356 jni_CallIntMethodA,
3357 jni_CallLongMethod,
3358 jni_CallLongMethodV,
3359 jni_CallLongMethodA,
3360 jni_CallFloatMethod,
3361 jni_CallFloatMethodV,
3362 jni_CallFloatMethodA,
3363 jni_CallDoubleMethod,
3364 jni_CallDoubleMethodV,
3365 jni_CallDoubleMethodA,
3366 jni_CallVoidMethod,
3367 jni_CallVoidMethodV,
3368 jni_CallVoidMethodA,
3369
3370 jni_CallNonvirtualObjectMethod,
3371 jni_CallNonvirtualObjectMethodV,
3372 jni_CallNonvirtualObjectMethodA,
3373 jni_CallNonvirtualBooleanMethod,
3374 jni_CallNonvirtualBooleanMethodV,
3375 jni_CallNonvirtualBooleanMethodA,
3376 jni_CallNonvirtualByteMethod,
3377 jni_CallNonvirtualByteMethodV,
3378 jni_CallNonvirtualByteMethodA,
3379 jni_CallNonvirtualCharMethod,
3380 jni_CallNonvirtualCharMethodV,
3381 jni_CallNonvirtualCharMethodA,
3382 jni_CallNonvirtualShortMethod,
3383 jni_CallNonvirtualShortMethodV,
3384 jni_CallNonvirtualShortMethodA,
3385 jni_CallNonvirtualIntMethod,
3386 jni_CallNonvirtualIntMethodV,
3387 jni_CallNonvirtualIntMethodA,
3388 jni_CallNonvirtualLongMethod,
3389 jni_CallNonvirtualLongMethodV,
3390 jni_CallNonvirtualLongMethodA,
3391 jni_CallNonvirtualFloatMethod,
3392 jni_CallNonvirtualFloatMethodV,
3393 jni_CallNonvirtualFloatMethodA,
3394 jni_CallNonvirtualDoubleMethod,
3395 jni_CallNonvirtualDoubleMethodV,
3396 jni_CallNonvirtualDoubleMethodA,
3397 jni_CallNonvirtualVoidMethod,
3398 jni_CallNonvirtualVoidMethodV,
3399 jni_CallNonvirtualVoidMethodA,
3400
3401 jni_GetFieldID,
3402
3403 jni_GetObjectField,
3404 jni_GetBooleanField,
3405 jni_GetByteField,
3406 jni_GetCharField,
3407 jni_GetShortField,
3408 jni_GetIntField,
3409 jni_GetLongField,
3410 jni_GetFloatField,
3411 jni_GetDoubleField,
3412
3413 jni_SetObjectField,
3414 jni_SetBooleanField,
3415 jni_SetByteField,
3416 jni_SetCharField,
3417 jni_SetShortField,
3418 jni_SetIntField,
3419 jni_SetLongField,
3420 jni_SetFloatField,
3421 jni_SetDoubleField,
3422
3423 jni_GetStaticMethodID,
3424
3425 jni_CallStaticObjectMethod,
3426 jni_CallStaticObjectMethodV,
3427 jni_CallStaticObjectMethodA,
3428 jni_CallStaticBooleanMethod,
3429 jni_CallStaticBooleanMethodV,
3430 jni_CallStaticBooleanMethodA,
3431 jni_CallStaticByteMethod,
3432 jni_CallStaticByteMethodV,
3433 jni_CallStaticByteMethodA,
3434 jni_CallStaticCharMethod,
3435 jni_CallStaticCharMethodV,
3436 jni_CallStaticCharMethodA,
3437 jni_CallStaticShortMethod,
3438 jni_CallStaticShortMethodV,
3439 jni_CallStaticShortMethodA,
3440 jni_CallStaticIntMethod,
3441 jni_CallStaticIntMethodV,
3442 jni_CallStaticIntMethodA,
3443 jni_CallStaticLongMethod,
3444 jni_CallStaticLongMethodV,
3445 jni_CallStaticLongMethodA,
3446 jni_CallStaticFloatMethod,
3447 jni_CallStaticFloatMethodV,
3448 jni_CallStaticFloatMethodA,
3449 jni_CallStaticDoubleMethod,
3450 jni_CallStaticDoubleMethodV,
3451 jni_CallStaticDoubleMethodA,
3452 jni_CallStaticVoidMethod,
3453 jni_CallStaticVoidMethodV,
3454 jni_CallStaticVoidMethodA,
3455
3456 jni_GetStaticFieldID,
3457
3458 jni_GetStaticObjectField,
3459 jni_GetStaticBooleanField,
3460 jni_GetStaticByteField,
3461 jni_GetStaticCharField,
3462 jni_GetStaticShortField,
3463 jni_GetStaticIntField,
3464 jni_GetStaticLongField,
3465 jni_GetStaticFloatField,
3466 jni_GetStaticDoubleField,
3467
3468 jni_SetStaticObjectField,
3469 jni_SetStaticBooleanField,
3470 jni_SetStaticByteField,
3471 jni_SetStaticCharField,
3472 jni_SetStaticShortField,
3473 jni_SetStaticIntField,
3474 jni_SetStaticLongField,
3475 jni_SetStaticFloatField,
3476 jni_SetStaticDoubleField,
3477
3478 jni_NewString,
3479 jni_GetStringLength,
3480 jni_GetStringChars,
3481 jni_ReleaseStringChars,
3482
3483 jni_NewStringUTF,
3484 jni_GetStringUTFLength,
3485 jni_GetStringUTFChars,
3486 jni_ReleaseStringUTFChars,
3487
3488 jni_GetArrayLength,
3489
3490 jni_NewObjectArray,
3491 jni_GetObjectArrayElement,
3492 jni_SetObjectArrayElement,
3493
3494 jni_NewBooleanArray,
3495 jni_NewByteArray,
3496 jni_NewCharArray,
3497 jni_NewShortArray,
3498 jni_NewIntArray,
3499 jni_NewLongArray,
3500 jni_NewFloatArray,
3501 jni_NewDoubleArray,
3502
3503 jni_GetBooleanArrayElements,
3504 jni_GetByteArrayElements,
3505 jni_GetCharArrayElements,
3506 jni_GetShortArrayElements,
3507 jni_GetIntArrayElements,
3508 jni_GetLongArrayElements,
3509 jni_GetFloatArrayElements,
3510 jni_GetDoubleArrayElements,
3511
3512 jni_ReleaseBooleanArrayElements,
3513 jni_ReleaseByteArrayElements,
3514 jni_ReleaseCharArrayElements,
3515 jni_ReleaseShortArrayElements,
3516 jni_ReleaseIntArrayElements,
3517 jni_ReleaseLongArrayElements,
3518 jni_ReleaseFloatArrayElements,
3519 jni_ReleaseDoubleArrayElements,
3520
3521 jni_GetBooleanArrayRegion,
3522 jni_GetByteArrayRegion,
3523 jni_GetCharArrayRegion,
3524 jni_GetShortArrayRegion,
3525 jni_GetIntArrayRegion,
3526 jni_GetLongArrayRegion,
3527 jni_GetFloatArrayRegion,
3528 jni_GetDoubleArrayRegion,
3529
3530 jni_SetBooleanArrayRegion,
3531 jni_SetByteArrayRegion,
3532 jni_SetCharArrayRegion,
3533 jni_SetShortArrayRegion,
3534 jni_SetIntArrayRegion,
3535 jni_SetLongArrayRegion,
3536 jni_SetFloatArrayRegion,
3537 jni_SetDoubleArrayRegion,
3538
3539 jni_RegisterNatives,
3540 jni_UnregisterNatives,
3541
3542 jni_MonitorEnter,
3543 jni_MonitorExit,
3544
3545 jni_GetJavaVM,
3546
3547 jni_GetStringRegion,
3548 jni_GetStringUTFRegion,
3549
3550 jni_GetPrimitiveArrayCritical,
3551 jni_ReleasePrimitiveArrayCritical,
3552
3553 jni_GetStringCritical,
3554 jni_ReleaseStringCritical,
3555
3556 jni_NewWeakGlobalRef,
3557 jni_DeleteWeakGlobalRef,
3558
3559 jni_ExceptionCheck,
3560
3561 jni_NewDirectByteBuffer,
3562 jni_GetDirectBufferAddress,
3563 jni_GetDirectBufferCapacity,
3564
3565 // New 1_6 features
3566
3567 jni_GetObjectRefType,
3568
3569 // Module features
3570
3571 jni_GetModule
3572 };
3573
3574
3575 // For jvmti use to modify jni function table.
3576 // Java threads in native contiues to run until it is transitioned
3577 // to VM at safepoint. Before the transition or before it is blocked
3578 // for safepoint it may access jni function table. VM could crash if
3579 // any java thread access the jni function table in the middle of memcpy.
3580 // To avoid this each function pointers are copied automically.
3581 void copy_jni_function_table(const struct JNINativeInterface_ *new_jni_NativeInterface) {
3582 assert(SafepointSynchronize::is_at_safepoint(), "must be at safepoint");
3583 intptr_t *a = (intptr_t *) jni_functions();
3584 intptr_t *b = (intptr_t *) new_jni_NativeInterface;
3585 for (uint i=0; i < sizeof(struct JNINativeInterface_)/sizeof(void *); i++) {
3586 Atomic::store(a++, *b++);
3587 }
3588 }
3589
3590 void quicken_jni_functions() {
3591 // Replace Get<Primitive>Field with fast versions
3592 if (UseFastJNIAccessors && !VerifyJNIFields && !CountJNICalls && !CheckJNICalls) {
3593 address func;
3594 func = JNI_FastGetField::generate_fast_get_boolean_field();
3595 if (func != (address)-1) {
3596 jni_NativeInterface.GetBooleanField = (GetBooleanField_t)func;
3597 }
3598 func = JNI_FastGetField::generate_fast_get_byte_field();
3599 if (func != (address)-1) {
3600 jni_NativeInterface.GetByteField = (GetByteField_t)func;
3601 }
3602 func = JNI_FastGetField::generate_fast_get_char_field();
3603 if (func != (address)-1) {
3604 jni_NativeInterface.GetCharField = (GetCharField_t)func;
3605 }
3606 func = JNI_FastGetField::generate_fast_get_short_field();
3607 if (func != (address)-1) {
3608 jni_NativeInterface.GetShortField = (GetShortField_t)func;
3609 }
3610 func = JNI_FastGetField::generate_fast_get_int_field();
3611 if (func != (address)-1) {
3612 jni_NativeInterface.GetIntField = (GetIntField_t)func;
3613 }
3614 func = JNI_FastGetField::generate_fast_get_long_field();
3615 if (func != (address)-1) {
3616 jni_NativeInterface.GetLongField = (GetLongField_t)func;
3617 }
3618 func = JNI_FastGetField::generate_fast_get_float_field();
3619 if (func != (address)-1) {
3620 jni_NativeInterface.GetFloatField = (GetFloatField_t)func;
3621 }
3622 func = JNI_FastGetField::generate_fast_get_double_field();
3623 if (func != (address)-1) {
3624 jni_NativeInterface.GetDoubleField = (GetDoubleField_t)func;
3625 }
3626 }
3627 }
3628
3629 // Returns the function structure
3630 struct JNINativeInterface_* jni_functions() {
3631 #if INCLUDE_JNI_CHECK
3632 if (CheckJNICalls) return jni_functions_check();
3633 #endif // INCLUDE_JNI_CHECK
3634 return &jni_NativeInterface;
3635 }
3636
3637 // Returns the function structure
3638 struct JNINativeInterface_* jni_functions_nocheck() {
3639 return &jni_NativeInterface;
3640 }
3641
3642 static void post_thread_start_event(const JavaThread* jt) {
3643 assert(jt != NULL, "invariant");
3644 EventThreadStart event;
3645 if (event.should_commit()) {
3646 event.set_thread(JFR_THREAD_ID(jt));
3647 event.set_parentThread((traceid)0);
3648 #if INCLUDE_JFR
3649 if (EventThreadStart::is_stacktrace_enabled()) {
3650 jt->jfr_thread_local()->set_cached_stack_trace_id((traceid)0);
3651 event.commit();
3652 jt->jfr_thread_local()->clear_cached_stack_trace();
3653 } else
3654 #endif
3655 {
3656 event.commit();
3657 }
3658 }
3659 }
3660
3661 // Invocation API
3662
3663
3664 // Forward declaration
3665 extern const struct JNIInvokeInterface_ jni_InvokeInterface;
3666
3667 // Global invocation API vars
3668 volatile int vm_created = 0;
3669 // Indicate whether it is safe to recreate VM. Recreation is only
3670 // possible after a failed initial creation attempt in some cases.
3671 volatile int safe_to_recreate_vm = 1;
3672 struct JavaVM_ main_vm = {&jni_InvokeInterface};
3673
3674
3675 #define JAVASTACKSIZE (400 * 1024) /* Default size of a thread java stack */
3676 enum { VERIFY_NONE, VERIFY_REMOTE, VERIFY_ALL };
3677
3678 DT_RETURN_MARK_DECL(GetDefaultJavaVMInitArgs, jint
3679 , HOTSPOT_JNI_GETDEFAULTJAVAVMINITARGS_RETURN(_ret_ref));
3680
3681 _JNI_IMPORT_OR_EXPORT_ jint JNICALL JNI_GetDefaultJavaVMInitArgs(void *args_) {
3682 HOTSPOT_JNI_GETDEFAULTJAVAVMINITARGS_ENTRY(args_);
3683 JDK1_1InitArgs *args = (JDK1_1InitArgs *)args_;
3684 jint ret = JNI_ERR;
3685 DT_RETURN_MARK(GetDefaultJavaVMInitArgs, jint, (const jint&)ret);
3686
3687 if (Threads::is_supported_jni_version(args->version)) {
3688 ret = JNI_OK;
3689 }
3690 // 1.1 style no longer supported in hotspot.
3691 // According the JNI spec, we should update args->version on return.
3692 // We also use the structure to communicate with launcher about default
3693 // stack size.
3694 if (args->version == JNI_VERSION_1_1) {
3695 args->version = JNI_VERSION_1_2;
3696 // javaStackSize is int in arguments structure
3697 assert(jlong(ThreadStackSize) * K < INT_MAX, "integer overflow");
3698 args->javaStackSize = (jint)(ThreadStackSize * K);
3699 }
3700 return ret;
3701 }
3702
3703 DT_RETURN_MARK_DECL(CreateJavaVM, jint
3704 , HOTSPOT_JNI_CREATEJAVAVM_RETURN(_ret_ref));
3705
3706 static jint JNI_CreateJavaVM_inner(JavaVM **vm, void **penv, void *args) {
3707 HOTSPOT_JNI_CREATEJAVAVM_ENTRY((void **) vm, penv, args);
3708
3709 jint result = JNI_ERR;
3710 DT_RETURN_MARK(CreateJavaVM, jint, (const jint&)result);
3711
3712 // We're about to use Atomic::xchg for synchronization. Some Zero
3713 // platforms use the GCC builtin __sync_lock_test_and_set for this,
3714 // but __sync_lock_test_and_set is not guaranteed to do what we want
3715 // on all architectures. So we check it works before relying on it.
3716 #if defined(ZERO) && defined(ASSERT)
3717 {
3718 jint a = 0xcafebabe;
3719 jint b = Atomic::xchg(&a, (jint) 0xdeadbeef);
3720 void *c = &a;
3721 void *d = Atomic::xchg(&c, &b);
3722 assert(a == (jint) 0xdeadbeef && b == (jint) 0xcafebabe, "Atomic::xchg() works");
3723 assert(c == &b && d == &a, "Atomic::xchg() works");
3724 }
3725 #endif // ZERO && ASSERT
3726
3727 // At the moment it's only possible to have one Java VM,
3728 // since some of the runtime state is in global variables.
3729
3730 // We cannot use our mutex locks here, since they only work on
3731 // Threads. We do an atomic compare and exchange to ensure only
3732 // one thread can call this method at a time
3733
3734 // We use Atomic::xchg rather than Atomic::add/dec since on some platforms
3735 // the add/dec implementations are dependent on whether we are running
3736 // on a multiprocessor Atomic::xchg does not have this problem.
3737 if (Atomic::xchg(&vm_created, 1) == 1) {
3738 return JNI_EEXIST; // already created, or create attempt in progress
3739 }
3740
3741 // If a previous creation attempt failed but can be retried safely,
3742 // then safe_to_recreate_vm will have been reset to 1 after being
3743 // cleared here. If a previous creation attempt succeeded and we then
3744 // destroyed that VM, we will be prevented from trying to recreate
3745 // the VM in the same process, as the value will still be 0.
3746 if (Atomic::xchg(&safe_to_recreate_vm, 0) == 0) {
3747 return JNI_ERR;
3748 }
3749
3750 assert(vm_created == 1, "vm_created is true during the creation");
3751
3752 /**
3753 * Certain errors during initialization are recoverable and do not
3754 * prevent this method from being called again at a later time
3755 * (perhaps with different arguments). However, at a certain
3756 * point during initialization if an error occurs we cannot allow
3757 * this function to be called again (or it will crash). In those
3758 * situations, the 'canTryAgain' flag is set to false, which atomically
3759 * sets safe_to_recreate_vm to 1, such that any new call to
3760 * JNI_CreateJavaVM will immediately fail using the above logic.
3761 */
3762 bool can_try_again = true;
3763
3764 result = Threads::create_vm((JavaVMInitArgs*) args, &can_try_again);
3765 if (result == JNI_OK) {
3766 JavaThread *thread = JavaThread::current();
3767 assert(!thread->has_pending_exception(), "should have returned not OK");
3768 /* thread is thread_in_vm here */
3769 *vm = (JavaVM *)(&main_vm);
3770 *(JNIEnv**)penv = thread->jni_environment();
3771
3772 #if INCLUDE_JVMCI
3773 if (EnableJVMCI) {
3774 if (UseJVMCICompiler) {
3775 // JVMCI is initialized on a CompilerThread
3776 if (BootstrapJVMCI) {
3777 JavaThread* THREAD = thread;
3778 JVMCICompiler* compiler = JVMCICompiler::instance(true, CATCH);
3779 compiler->bootstrap(THREAD);
3780 if (HAS_PENDING_EXCEPTION) {
3781 HandleMark hm(THREAD);
3782 vm_exit_during_initialization(Handle(THREAD, PENDING_EXCEPTION));
3783 }
3784 }
3785 }
3786 }
3787 #endif
3788
3789 // Notify JVMTI
3790 if (JvmtiExport::should_post_thread_life()) {
3791 JvmtiExport::post_thread_start(thread);
3792 }
3793
3794 post_thread_start_event(thread);
3795
3796 #ifndef PRODUCT
3797 if (ReplayCompiles) ciReplay::replay(thread);
3798
3799 // Some platforms (like Win*) need a wrapper around these test
3800 // functions in order to properly handle error conditions.
3801 VMError::test_error_handler();
3802 #endif
3803
3804 // Since this is not a JVM_ENTRY we have to set the thread state manually before leaving.
3805 ThreadStateTransition::transition(thread, _thread_in_vm, _thread_in_native);
3806 } else {
3807 // If create_vm exits because of a pending exception, exit with that
3808 // exception. In the future when we figure out how to reclaim memory,
3809 // we may be able to exit with JNI_ERR and allow the calling application
3810 // to continue.
3811 if (Universe::is_fully_initialized()) {
3812 // otherwise no pending exception possible - VM will already have aborted
3813 JavaThread* THREAD = JavaThread::current();
3814 if (HAS_PENDING_EXCEPTION) {
3815 HandleMark hm(THREAD);
3816 vm_exit_during_initialization(Handle(THREAD, PENDING_EXCEPTION));
3817 }
3818 }
3819
3820 if (can_try_again) {
3821 // reset safe_to_recreate_vm to 1 so that retrial would be possible
3822 safe_to_recreate_vm = 1;
3823 }
3824
3825 // Creation failed. We must reset vm_created
3826 *vm = 0;
3827 *(JNIEnv**)penv = 0;
3828 // reset vm_created last to avoid race condition. Use OrderAccess to
3829 // control both compiler and architectural-based reordering.
3830 Atomic::release_store(&vm_created, 0);
3831 }
3832
3833 // Flush stdout and stderr before exit.
3834 fflush(stdout);
3835 fflush(stderr);
3836
3837 return result;
3838
3839 }
3840
3841 _JNI_IMPORT_OR_EXPORT_ jint JNICALL JNI_CreateJavaVM(JavaVM **vm, void **penv, void *args) {
3842 jint result = JNI_ERR;
3843 // On Windows, let CreateJavaVM run with SEH protection
3844 #ifdef _WIN32
3845 __try {
3846 #endif
3847 result = JNI_CreateJavaVM_inner(vm, penv, args);
3848 #ifdef _WIN32
3849 } __except(topLevelExceptionFilter((_EXCEPTION_POINTERS*)_exception_info())) {
3850 // Nothing to do.
3851 }
3852 #endif
3853 return result;
3854 }
3855
3856 _JNI_IMPORT_OR_EXPORT_ jint JNICALL JNI_GetCreatedJavaVMs(JavaVM **vm_buf, jsize bufLen, jsize *numVMs) {
3857 // See bug 4367188, the wrapper can sometimes cause VM crashes
3858 // JNIWrapper("GetCreatedJavaVMs");
3859
3860 HOTSPOT_JNI_GETCREATEDJAVAVMS_ENTRY((void **) vm_buf, bufLen, (uintptr_t *) numVMs);
3861
3862 if (vm_created == 1) {
3863 if (numVMs != NULL) *numVMs = 1;
3864 if (bufLen > 0) *vm_buf = (JavaVM *)(&main_vm);
3865 } else {
3866 if (numVMs != NULL) *numVMs = 0;
3867 }
3868 HOTSPOT_JNI_GETCREATEDJAVAVMS_RETURN(JNI_OK);
3869 return JNI_OK;
3870 }
3871
3872 extern "C" {
3873
3874 DT_RETURN_MARK_DECL(DestroyJavaVM, jint
3875 , HOTSPOT_JNI_DESTROYJAVAVM_RETURN(_ret_ref));
3876
3877 static jint JNICALL jni_DestroyJavaVM_inner(JavaVM *vm) {
3878 HOTSPOT_JNI_DESTROYJAVAVM_ENTRY(vm);
3879 jint res = JNI_ERR;
3880 DT_RETURN_MARK(DestroyJavaVM, jint, (const jint&)res);
3881
3882 if (vm_created == 0) {
3883 res = JNI_ERR;
3884 return res;
3885 }
3886
3887 JNIWrapper("DestroyJavaVM");
3888 JNIEnv *env;
3889 JavaVMAttachArgs destroyargs;
3890 destroyargs.version = CurrentVersion;
3891 destroyargs.name = (char *)"DestroyJavaVM";
3892 destroyargs.group = NULL;
3893 res = vm->AttachCurrentThread((void **)&env, (void *)&destroyargs);
3894 if (res != JNI_OK) {
3895 return res;
3896 }
3897
3898 // Since this is not a JVM_ENTRY we have to set the thread state manually before entering.
3899 JavaThread* thread = JavaThread::current();
3900 ThreadStateTransition::transition_from_native(thread, _thread_in_vm);
3901 if (Threads::destroy_vm()) {
3902 // Should not change thread state, VM is gone
3903 vm_created = 0;
3904 res = JNI_OK;
3905 return res;
3906 } else {
3907 ThreadStateTransition::transition(thread, _thread_in_vm, _thread_in_native);
3908 res = JNI_ERR;
3909 return res;
3910 }
3911 }
3912
3913 jint JNICALL jni_DestroyJavaVM(JavaVM *vm) {
3914 jint result = JNI_ERR;
3915 // On Windows, we need SEH protection
3916 #ifdef _WIN32
3917 __try {
3918 #endif
3919 result = jni_DestroyJavaVM_inner(vm);
3920 #ifdef _WIN32
3921 } __except(topLevelExceptionFilter((_EXCEPTION_POINTERS*)_exception_info())) {
3922 // Nothing to do.
3923 }
3924 #endif
3925 return result;
3926 }
3927
3928 static jint attach_current_thread(JavaVM *vm, void **penv, void *_args, bool daemon) {
3929 JavaVMAttachArgs *args = (JavaVMAttachArgs *) _args;
3930
3931 // Check below commented out from JDK1.2fcs as well
3932 /*
3933 if (args && (args->version != JNI_VERSION_1_1 || args->version != JNI_VERSION_1_2)) {
3934 return JNI_EVERSION;
3935 }
3936 */
3937
3938 Thread* t = Thread::current_or_null();
3939 if (t != NULL) {
3940 // If executing from an atexit hook we may be in the VMThread.
3941 if (t->is_Java_thread()) {
3942 // If the thread has been attached this operation is a no-op
3943 *(JNIEnv**)penv = ((JavaThread*) t)->jni_environment();
3944 return JNI_OK;
3945 } else {
3946 return JNI_ERR;
3947 }
3948 }
3949
3950 // Create a thread and mark it as attaching so it will be skipped by the
3951 // ThreadsListEnumerator - see CR 6404306
3952 JavaThread* thread = new JavaThread(true);
3953
3954 // Set correct safepoint info. The thread is going to call into Java when
3955 // initializing the Java level thread object. Hence, the correct state must
3956 // be set in order for the Safepoint code to deal with it correctly.
3957 thread->set_thread_state(_thread_in_vm);
3958 thread->record_stack_base_and_size();
3959 thread->register_thread_stack_with_NMT();
3960 thread->initialize_thread_current();
3961
3962 if (!os::create_attached_thread(thread)) {
3963 thread->smr_delete();
3964 return JNI_ERR;
3965 }
3966 // Enable stack overflow checks
3967 thread->create_stack_guard_pages();
3968
3969 thread->initialize_tlab();
3970
3971 thread->cache_global_variables();
3972
3973 // This thread will not do a safepoint check, since it has
3974 // not been added to the Thread list yet.
3975 { MutexLocker ml(Threads_lock);
3976 // This must be inside this lock in order to get FullGCALot to work properly, i.e., to
3977 // avoid this thread trying to do a GC before it is added to the thread-list
3978 thread->set_active_handles(JNIHandleBlock::allocate_block());
3979 Threads::add(thread, daemon);
3980 }
3981 // Create thread group and name info from attach arguments
3982 oop group = NULL;
3983 char* thread_name = NULL;
3984 if (args != NULL && Threads::is_supported_jni_version(args->version)) {
3985 group = JNIHandles::resolve(args->group);
3986 thread_name = args->name; // may be NULL
3987 }
3988 if (group == NULL) group = Universe::main_thread_group();
3989
3990 // Create Java level thread object and attach it to this thread
3991 bool attach_failed = false;
3992 {
3993 EXCEPTION_MARK;
3994 HandleMark hm(THREAD);
3995 Handle thread_group(THREAD, group);
3996 thread->allocate_threadObj(thread_group, thread_name, daemon, THREAD);
3997 if (HAS_PENDING_EXCEPTION) {
3998 CLEAR_PENDING_EXCEPTION;
3999 // cleanup outside the handle mark.
4000 attach_failed = true;
4001 }
4002 }
4003
4004 if (attach_failed) {
4005 // Added missing cleanup
4006 thread->cleanup_failed_attach_current_thread(daemon);
4007 return JNI_ERR;
4008 }
4009
4010 // mark the thread as no longer attaching
4011 // this uses a fence to push the change through so we don't have
4012 // to regrab the threads_lock
4013 thread->set_done_attaching_via_jni();
4014
4015 // Set java thread status.
4016 java_lang_Thread::set_thread_status(thread->threadObj(),
4017 java_lang_Thread::RUNNABLE);
4018
4019 // Notify the debugger
4020 if (JvmtiExport::should_post_thread_life()) {
4021 JvmtiExport::post_thread_start(thread);
4022 }
4023
4024 post_thread_start_event(thread);
4025
4026 *(JNIEnv**)penv = thread->jni_environment();
4027
4028 // Now leaving the VM, so change thread_state. This is normally automatically taken care
4029 // of in the JVM_ENTRY. But in this situation we have to do it manually. Notice, that by
4030 // using ThreadStateTransition::transition, we do a callback to the safepoint code if
4031 // needed.
4032
4033 ThreadStateTransition::transition(thread, _thread_in_vm, _thread_in_native);
4034
4035 // Perform any platform dependent FPU setup
4036 os::setup_fpu();
4037
4038 return JNI_OK;
4039 }
4040
4041
4042 jint JNICALL jni_AttachCurrentThread(JavaVM *vm, void **penv, void *_args) {
4043 HOTSPOT_JNI_ATTACHCURRENTTHREAD_ENTRY(vm, penv, _args);
4044 if (vm_created == 0) {
4045 HOTSPOT_JNI_ATTACHCURRENTTHREAD_RETURN((uint32_t) JNI_ERR);
4046 return JNI_ERR;
4047 }
4048
4049 JNIWrapper("AttachCurrentThread");
4050 jint ret = attach_current_thread(vm, penv, _args, false);
4051 HOTSPOT_JNI_ATTACHCURRENTTHREAD_RETURN(ret);
4052 return ret;
4053 }
4054
4055
4056 jint JNICALL jni_DetachCurrentThread(JavaVM *vm) {
4057 HOTSPOT_JNI_DETACHCURRENTTHREAD_ENTRY(vm);
4058 if (vm_created == 0) {
4059 HOTSPOT_JNI_DETACHCURRENTTHREAD_RETURN(JNI_ERR);
4060 return JNI_ERR;
4061 }
4062
4063 JNIWrapper("DetachCurrentThread");
4064
4065 Thread* current = Thread::current_or_null();
4066
4067 // If the thread has already been detached the operation is a no-op
4068 if (current == NULL) {
4069 HOTSPOT_JNI_DETACHCURRENTTHREAD_RETURN(JNI_OK);
4070 return JNI_OK;
4071 }
4072
4073 // If executing from an atexit hook we may be in the VMThread.
4074 if (!current->is_Java_thread()) {
4075 HOTSPOT_JNI_DETACHCURRENTTHREAD_RETURN((uint32_t) JNI_ERR);
4076 return JNI_ERR;
4077 }
4078
4079 VM_Exit::block_if_vm_exited();
4080
4081 JavaThread* thread = (JavaThread*) current;
4082 if (thread->has_last_Java_frame()) {
4083 HOTSPOT_JNI_DETACHCURRENTTHREAD_RETURN((uint32_t) JNI_ERR);
4084 // Can't detach a thread that's running java, that can't work.
4085 return JNI_ERR;
4086 }
4087
4088 // Safepoint support. Have to do call-back to safepoint code, if in the
4089 // middle of a safepoint operation
4090 ThreadStateTransition::transition_from_native(thread, _thread_in_vm);
4091
4092 // XXX: Note that JavaThread::exit() call below removes the guards on the
4093 // stack pages set up via enable_stack_{red,yellow}_zone() calls
4094 // above in jni_AttachCurrentThread. Unfortunately, while the setting
4095 // of the guards is visible in jni_AttachCurrentThread above,
4096 // the removal of the guards is buried below in JavaThread::exit()
4097 // here. The abstraction should be more symmetrically either exposed
4098 // or hidden (e.g. it could probably be hidden in the same
4099 // (platform-dependent) methods where we do alternate stack
4100 // maintenance work?)
4101 thread->exit(false, JavaThread::jni_detach);
4102 thread->smr_delete();
4103
4104 HOTSPOT_JNI_DETACHCURRENTTHREAD_RETURN(JNI_OK);
4105 return JNI_OK;
4106 }
4107
4108 DT_RETURN_MARK_DECL(GetEnv, jint
4109 , HOTSPOT_JNI_GETENV_RETURN(_ret_ref));
4110
4111 jint JNICALL jni_GetEnv(JavaVM *vm, void **penv, jint version) {
4112 HOTSPOT_JNI_GETENV_ENTRY(vm, penv, version);
4113 jint ret = JNI_ERR;
4114 DT_RETURN_MARK(GetEnv, jint, (const jint&)ret);
4115
4116 if (vm_created == 0) {
4117 *penv = NULL;
4118 ret = JNI_EDETACHED;
4119 return ret;
4120 }
4121
4122 if (JniExportedInterface::GetExportedInterface(vm, penv, version, &ret)) {
4123 return ret;
4124 }
4125
4126 #ifndef JVMPI_VERSION_1
4127 // need these in order to be polite about older agents
4128 #define JVMPI_VERSION_1 ((jint)0x10000001)
4129 #define JVMPI_VERSION_1_1 ((jint)0x10000002)
4130 #define JVMPI_VERSION_1_2 ((jint)0x10000003)
4131 #endif // !JVMPI_VERSION_1
4132
4133 Thread* thread = Thread::current_or_null();
4134 if (thread != NULL && thread->is_Java_thread()) {
4135 if (Threads::is_supported_jni_version_including_1_1(version)) {
4136 *(JNIEnv**)penv = ((JavaThread*) thread)->jni_environment();
4137 ret = JNI_OK;
4138 return ret;
4139
4140 } else if (version == JVMPI_VERSION_1 ||
4141 version == JVMPI_VERSION_1_1 ||
4142 version == JVMPI_VERSION_1_2) {
4143 tty->print_cr("ERROR: JVMPI, an experimental interface, is no longer supported.");
4144 tty->print_cr("Please use the supported interface: the JVM Tool Interface (JVM TI).");
4145 ret = JNI_EVERSION;
4146 return ret;
4147 } else if (JvmtiExport::is_jvmdi_version(version)) {
4148 tty->print_cr("FATAL ERROR: JVMDI is no longer supported.");
4149 tty->print_cr("Please use the supported interface: the JVM Tool Interface (JVM TI).");
4150 ret = JNI_EVERSION;
4151 return ret;
4152 } else {
4153 *penv = NULL;
4154 ret = JNI_EVERSION;
4155 return ret;
4156 }
4157 } else {
4158 *penv = NULL;
4159 ret = JNI_EDETACHED;
4160 return ret;
4161 }
4162 }
4163
4164
4165 jint JNICALL jni_AttachCurrentThreadAsDaemon(JavaVM *vm, void **penv, void *_args) {
4166 HOTSPOT_JNI_ATTACHCURRENTTHREADASDAEMON_ENTRY(vm, penv, _args);
4167 if (vm_created == 0) {
4168 HOTSPOT_JNI_ATTACHCURRENTTHREADASDAEMON_RETURN((uint32_t) JNI_ERR);
4169 return JNI_ERR;
4170 }
4171
4172 JNIWrapper("AttachCurrentThreadAsDaemon");
4173 jint ret = attach_current_thread(vm, penv, _args, true);
4174 HOTSPOT_JNI_ATTACHCURRENTTHREADASDAEMON_RETURN(ret);
4175 return ret;
4176 }
4177
4178
4179 } // End extern "C"
4180
4181 const struct JNIInvokeInterface_ jni_InvokeInterface = {
4182 NULL,
4183 NULL,
4184 NULL,
4185
4186 jni_DestroyJavaVM,
4187 jni_AttachCurrentThread,
4188 jni_DetachCurrentThread,
4189 jni_GetEnv,
4190 jni_AttachCurrentThreadAsDaemon
4191 };