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/modules.hpp"
36 #include "classfile/symbolTable.hpp"
37 #include "classfile/systemDictionary.hpp"
38 #include "classfile/vmSymbols.hpp"
39 #include "gc/shared/gcLocker.inline.hpp"
40 #include "interpreter/linkResolver.hpp"
41 #include "jfr/jfrEvents.hpp"
42 #include "jfr/support/jfrThreadId.hpp"
43 #include "logging/log.hpp"
44 #include "memory/allocation.hpp"
45 #include "memory/allocation.inline.hpp"
46 #include "memory/oopFactory.hpp"
47 #include "memory/resourceArea.hpp"
48 #include "memory/universe.hpp"
49 #include "oops/access.inline.hpp"
50 #include "oops/arrayOop.inline.hpp"
51 #include "oops/instanceKlass.hpp"
52 #include "oops/instanceOop.hpp"
53 #include "oops/markWord.hpp"
54 #include "oops/method.hpp"
55 #include "oops/objArrayKlass.hpp"
56 #include "oops/objArrayOop.inline.hpp"
57 #include "oops/oop.inline.hpp"
58 #include "oops/symbol.hpp"
59 #include "oops/typeArrayKlass.hpp"
60 #include "oops/typeArrayOop.inline.hpp"
61 #include "prims/jniCheck.hpp"
62 #include "prims/jniExport.hpp"
63 #include "prims/jniFastGetField.hpp"
64 #include "prims/jvm_misc.hpp"
65 #include "prims/jvmtiExport.hpp"
66 #include "prims/jvmtiThreadState.hpp"
67 #include "runtime/atomic.hpp"
68 #include "runtime/fieldDescriptor.inline.hpp"
69 #include "runtime/handles.inline.hpp"
70 #include "runtime/interfaceSupport.inline.hpp"
71 #include "runtime/java.hpp"
72 #include "runtime/javaCalls.hpp"
73 #include "runtime/jfieldIDWorkaround.hpp"
74 #include "runtime/jniHandles.inline.hpp"
75 #include "runtime/reflection.hpp"
76 #include "runtime/safepointVerifiers.hpp"
77 #include "runtime/sharedRuntime.hpp"
78 #include "runtime/signature.hpp"
79 #include "runtime/thread.inline.hpp"
80 #include "runtime/vmOperations.hpp"
81 #include "services/memTracker.hpp"
82 #include "services/runtimeService.hpp"
83 #include "utilities/defaultStream.hpp"
84 #include "utilities/dtrace.hpp"
85 #include "utilities/events.hpp"
86 #include "utilities/histogram.hpp"
87 #include "utilities/macros.hpp"
88 #include "utilities/vmError.hpp"
89 #if INCLUDE_JVMCI
90 #include "jvmci/jvmciCompiler.hpp"
91 #endif
92
93 static jint CurrentVersion = JNI_VERSION_10;
94
95 #ifdef _WIN32
96 extern LONG WINAPI topLevelExceptionFilter(_EXCEPTION_POINTERS* );
97 #endif
98
99 // The DT_RETURN_MARK macros create a scoped object to fire the dtrace
100 // '-return' probe regardless of the return path is taken out of the function.
101 // Methods that have multiple return paths use this to avoid having to
102 // instrument each return path. Methods that use CHECK or THROW must use this
103 // since those macros can cause an immedate uninstrumented return.
104 //
105 // In order to get the return value, a reference to the variable containing
106 // the return value must be passed to the contructor of the object, and
107 // the return value must be set before return (since the mark object has
108 // a reference to it).
109 //
110 // Example:
111 // DT_RETURN_MARK_DECL(SomeFunc, int);
112 // JNI_ENTRY(int, SomeFunc, ...)
113 // int return_value = 0;
114 // DT_RETURN_MARK(SomeFunc, int, (const int&)return_value);
115 // foo(CHECK_0)
116 // return_value = 5;
117 // return return_value;
118 // JNI_END
119 #define DT_RETURN_MARK_DECL(name, type, probe) \
120 DTRACE_ONLY( \
121 class DTraceReturnProbeMark_##name { \
122 public: \
123 const type& _ret_ref; \
124 DTraceReturnProbeMark_##name(const type& v) : _ret_ref(v) {} \
125 ~DTraceReturnProbeMark_##name() { \
126 probe; \
127 } \
128 } \
129 )
130 // Void functions are simpler since there's no return value
131 #define DT_VOID_RETURN_MARK_DECL(name, probe) \
132 DTRACE_ONLY( \
133 class DTraceReturnProbeMark_##name { \
134 public: \
135 ~DTraceReturnProbeMark_##name() { \
136 probe; \
137 } \
138 } \
139 )
140
141 // Place these macros in the function to mark the return. Non-void
142 // functions need the type and address of the return value.
143 #define DT_RETURN_MARK(name, type, ref) \
144 DTRACE_ONLY( DTraceReturnProbeMark_##name dtrace_return_mark(ref) )
145 #define DT_VOID_RETURN_MARK(name) \
146 DTRACE_ONLY( DTraceReturnProbeMark_##name dtrace_return_mark )
147
148
149 // Use these to select distinct code for floating-point vs. non-floating point
150 // situations. Used from within common macros where we need slightly
151 // different behavior for Float/Double
152 #define FP_SELECT_Boolean(intcode, fpcode) intcode
153 #define FP_SELECT_Byte(intcode, fpcode) intcode
154 #define FP_SELECT_Char(intcode, fpcode) intcode
155 #define FP_SELECT_Short(intcode, fpcode) intcode
156 #define FP_SELECT_Object(intcode, fpcode) intcode
157 #define FP_SELECT_Int(intcode, fpcode) intcode
158 #define FP_SELECT_Long(intcode, fpcode) intcode
159 #define FP_SELECT_Float(intcode, fpcode) fpcode
160 #define FP_SELECT_Double(intcode, fpcode) fpcode
161 #define FP_SELECT(TypeName, intcode, fpcode) \
162 FP_SELECT_##TypeName(intcode, fpcode)
163
164 // Choose DT_RETURN_MARK macros based on the type: float/double -> void
165 // (dtrace doesn't do FP yet)
166 #define DT_RETURN_MARK_DECL_FOR(TypeName, name, type, probe) \
167 FP_SELECT(TypeName, \
168 DT_RETURN_MARK_DECL(name, type, probe), DT_VOID_RETURN_MARK_DECL(name, probe) )
169 #define DT_RETURN_MARK_FOR(TypeName, name, type, ref) \
170 FP_SELECT(TypeName, \
171 DT_RETURN_MARK(name, type, ref), DT_VOID_RETURN_MARK(name) )
172
173
174 // out-of-line helpers for class jfieldIDWorkaround:
175
176 bool jfieldIDWorkaround::is_valid_jfieldID(Klass* k, jfieldID id) {
177 if (jfieldIDWorkaround::is_instance_jfieldID(k, id)) {
178 uintptr_t as_uint = (uintptr_t) id;
179 intptr_t offset = raw_instance_offset(id);
180 if (is_checked_jfieldID(id)) {
181 if (!klass_hash_ok(k, id)) {
182 return false;
183 }
184 }
185 return InstanceKlass::cast(k)->contains_field_offset(offset);
186 } else {
187 JNIid* result = (JNIid*) id;
188 #ifdef ASSERT
189 return result != NULL && result->is_static_field_id();
190 #else
191 return result != NULL;
192 #endif
193 }
194 }
195
196
197 intptr_t jfieldIDWorkaround::encode_klass_hash(Klass* k, intptr_t offset) {
198 if (offset <= small_offset_mask) {
199 Klass* field_klass = k;
200 Klass* super_klass = field_klass->super();
201 // With compressed oops the most super class with nonstatic fields would
202 // be the owner of fields embedded in the header.
203 while (InstanceKlass::cast(super_klass)->has_nonstatic_fields() &&
204 InstanceKlass::cast(super_klass)->contains_field_offset(offset)) {
205 field_klass = super_klass; // super contains the field also
206 super_klass = field_klass->super();
207 }
208 debug_only(NoSafepointVerifier nosafepoint;)
209 uintptr_t klass_hash = field_klass->identity_hash();
210 return ((klass_hash & klass_mask) << klass_shift) | checked_mask_in_place;
211 } else {
212 #if 0
213 #ifndef PRODUCT
214 {
215 ResourceMark rm;
216 warning("VerifyJNIFields: long offset %d in %s", offset, k->external_name());
217 }
218 #endif
219 #endif
220 return 0;
221 }
222 }
223
224 bool jfieldIDWorkaround::klass_hash_ok(Klass* k, jfieldID id) {
225 uintptr_t as_uint = (uintptr_t) id;
226 intptr_t klass_hash = (as_uint >> klass_shift) & klass_mask;
227 do {
228 debug_only(NoSafepointVerifier nosafepoint;)
229 // Could use a non-blocking query for identity_hash here...
230 if ((k->identity_hash() & klass_mask) == klass_hash)
231 return true;
232 k = k->super();
233 } while (k != NULL);
234 return false;
235 }
236
237 void jfieldIDWorkaround::verify_instance_jfieldID(Klass* k, jfieldID id) {
238 guarantee(jfieldIDWorkaround::is_instance_jfieldID(k, id), "must be an instance field" );
239 uintptr_t as_uint = (uintptr_t) id;
240 intptr_t offset = raw_instance_offset(id);
241 if (VerifyJNIFields) {
242 if (is_checked_jfieldID(id)) {
243 guarantee(klass_hash_ok(k, id),
244 "Bug in native code: jfieldID class must match object");
245 } else {
246 #if 0
247 #ifndef PRODUCT
248 if (Verbose) {
249 ResourceMark rm;
250 warning("VerifyJNIFields: unverified offset %d for %s", offset, k->external_name());
251 }
252 #endif
253 #endif
254 }
255 }
256 guarantee(InstanceKlass::cast(k)->contains_field_offset(offset),
257 "Bug in native code: jfieldID offset must address interior of object");
258 }
259
260 // Wrapper to trace JNI functions
261
262 #ifdef ASSERT
263 Histogram* JNIHistogram;
264 static volatile int JNIHistogram_lock = 0;
265
266 class JNIHistogramElement : public HistogramElement {
267 public:
268 JNIHistogramElement(const char* name);
269 };
270
271 JNIHistogramElement::JNIHistogramElement(const char* elementName) {
272 _name = elementName;
273 uintx count = 0;
274
275 while (Atomic::cmpxchg(&JNIHistogram_lock, 0, 1) != 0) {
276 while (Atomic::load_acquire(&JNIHistogram_lock) != 0) {
277 count +=1;
278 if ( (WarnOnStalledSpinLock > 0)
279 && (count % WarnOnStalledSpinLock == 0)) {
280 warning("JNIHistogram_lock seems to be stalled");
281 }
282 }
283 }
284
285
286 if(JNIHistogram == NULL)
287 JNIHistogram = new Histogram("JNI Call Counts",100);
288
289 JNIHistogram->add_element(this);
290 Atomic::dec(&JNIHistogram_lock);
291 }
292
293 #define JNICountWrapper(arg) \
294 static JNIHistogramElement* e = new JNIHistogramElement(arg); \
295 /* There is a MT-race condition in VC++. So we need to make sure that that e has been initialized */ \
296 if (e != NULL) e->increment_count()
297 #define JNIWrapper(arg) JNICountWrapper(arg);
298 #else
299 #define JNIWrapper(arg)
300 #endif
301
302
303 // Implementation of JNI entries
304
305 DT_RETURN_MARK_DECL(DefineClass, jclass
306 , HOTSPOT_JNI_DEFINECLASS_RETURN(_ret_ref));
307
308 JNI_ENTRY(jclass, jni_DefineClass(JNIEnv *env, const char *name, jobject loaderRef,
309 const jbyte *buf, jsize bufLen))
310 JNIWrapper("DefineClass");
311
312 HOTSPOT_JNI_DEFINECLASS_ENTRY(
313 env, (char*) name, loaderRef, (char*) buf, bufLen);
314
315 jclass cls = NULL;
316 DT_RETURN_MARK(DefineClass, jclass, (const jclass&)cls);
317
318 TempNewSymbol class_name = NULL;
319 // Since exceptions can be thrown, class initialization can take place
320 // if name is NULL no check for class name in .class stream has to be made.
321 if (name != NULL) {
322 const int str_len = (int)strlen(name);
323 if (str_len > Symbol::max_length()) {
324 // It's impossible to create this class; the name cannot fit
325 // into the constant pool.
326 Exceptions::fthrow(THREAD_AND_LOCATION,
327 vmSymbols::java_lang_NoClassDefFoundError(),
328 "Class name exceeds maximum length of %d: %s",
329 Symbol::max_length(),
330 name);
331 return 0;
332 }
333 class_name = SymbolTable::new_symbol(name);
334 }
335 ResourceMark rm(THREAD);
336 ClassFileStream st((u1*)buf, bufLen, NULL, ClassFileStream::verify);
337 Handle class_loader (THREAD, JNIHandles::resolve(loaderRef));
338
339 if (UsePerfData && !class_loader.is_null()) {
340 // check whether the current caller thread holds the lock or not.
341 // If not, increment the corresponding counter
342 if (ObjectSynchronizer::
343 query_lock_ownership((JavaThread*)THREAD, class_loader) !=
344 ObjectSynchronizer::owner_self) {
345 ClassLoader::sync_JNIDefineClassLockFreeCounter()->inc();
346 }
347 }
348 Klass* k = SystemDictionary::resolve_from_stream(class_name,
349 class_loader,
350 Handle(),
351 &st,
352 CHECK_NULL);
353
354 if (log_is_enabled(Debug, class, resolve) && k != NULL) {
355 trace_class_resolution(k);
356 }
357
358 cls = (jclass)JNIHandles::make_local(
359 env, k->java_mirror());
360 return cls;
361 JNI_END
362
363
364
365 DT_RETURN_MARK_DECL(FindClass, jclass
366 , HOTSPOT_JNI_FINDCLASS_RETURN(_ret_ref));
367
368 JNI_ENTRY(jclass, jni_FindClass(JNIEnv *env, const char *name))
369 JNIWrapper("FindClass");
370
371 HOTSPOT_JNI_FINDCLASS_ENTRY(env, (char *)name);
372
373 jclass result = NULL;
374 DT_RETURN_MARK(FindClass, jclass, (const jclass&)result);
375
376 // Sanity check the name: it cannot be null or larger than the maximum size
377 // name we can fit in the constant pool.
378 if (name == NULL) {
379 THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), "No class name given");
380 }
381 if ((int)strlen(name) > Symbol::max_length()) {
382 Exceptions::fthrow(THREAD_AND_LOCATION,
383 vmSymbols::java_lang_NoClassDefFoundError(),
384 "Class name exceeds maximum length of %d: %s",
385 Symbol::max_length(),
386 name);
387 return 0;
388 }
389
390 //%note jni_3
391 Handle protection_domain;
392 // Find calling class
393 Klass* k = thread->security_get_caller_class(0);
394 // default to the system loader when no context
395 Handle loader(THREAD, SystemDictionary::java_system_loader());
396 if (k != NULL) {
397 // Special handling to make sure JNI_OnLoad and JNI_OnUnload are executed
398 // in the correct class context.
399 if (k->class_loader() == NULL &&
400 k->name() == vmSymbols::jdk_internal_loader_NativeLibraries()) {
401 JavaValue result(T_OBJECT);
402 JavaCalls::call_static(&result, k,
403 vmSymbols::getFromClass_name(),
404 vmSymbols::void_class_signature(),
405 CHECK_NULL);
406 // When invoked from JNI_OnLoad, NativeLibraries::getFromClass returns
407 // a non-NULL Class object. When invoked from JNI_OnUnload,
408 // it will return NULL to indicate no context.
409 oop mirror = (oop) result.get_jobject();
410 if (mirror != NULL) {
411 Klass* fromClass = java_lang_Class::as_Klass(mirror);
412 loader = Handle(THREAD, fromClass->class_loader());
413 protection_domain = Handle(THREAD, fromClass->protection_domain());
414 }
415 } else {
416 loader = Handle(THREAD, k->class_loader());
417 }
418 }
419
420 TempNewSymbol sym = SymbolTable::new_symbol(name);
421 result = find_class_from_class_loader(env, sym, true, loader,
422 protection_domain, true, thread);
423
424 if (log_is_enabled(Debug, class, resolve) && result != NULL) {
425 trace_class_resolution(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(result)));
426 }
427
428 return result;
429 JNI_END
430
431 DT_RETURN_MARK_DECL(FromReflectedMethod, jmethodID
432 , HOTSPOT_JNI_FROMREFLECTEDMETHOD_RETURN((uintptr_t)_ret_ref));
433
434 JNI_ENTRY(jmethodID, jni_FromReflectedMethod(JNIEnv *env, jobject method))
435 JNIWrapper("FromReflectedMethod");
436
437 HOTSPOT_JNI_FROMREFLECTEDMETHOD_ENTRY(env, method);
438
439 jmethodID ret = NULL;
440 DT_RETURN_MARK(FromReflectedMethod, jmethodID, (const jmethodID&)ret);
441
442 // method is a handle to a java.lang.reflect.Method object
443 oop reflected = JNIHandles::resolve_non_null(method);
444 oop mirror = NULL;
445 int slot = 0;
446
447 if (reflected->klass() == SystemDictionary::reflect_Constructor_klass()) {
448 mirror = java_lang_reflect_Constructor::clazz(reflected);
449 slot = java_lang_reflect_Constructor::slot(reflected);
450 } else {
451 assert(reflected->klass() == SystemDictionary::reflect_Method_klass(), "wrong type");
452 mirror = java_lang_reflect_Method::clazz(reflected);
453 slot = java_lang_reflect_Method::slot(reflected);
454 }
455 Klass* k1 = java_lang_Class::as_Klass(mirror);
456
457 // Make sure class is initialized before handing id's out to methods
458 k1->initialize(CHECK_NULL);
459 Method* m = InstanceKlass::cast(k1)->method_with_idnum(slot);
460 ret = m==NULL? NULL : m->jmethod_id(); // return NULL if reflected method deleted
461 return ret;
462 JNI_END
463
464 DT_RETURN_MARK_DECL(FromReflectedField, jfieldID
465 , HOTSPOT_JNI_FROMREFLECTEDFIELD_RETURN((uintptr_t)_ret_ref));
466
467 JNI_ENTRY(jfieldID, jni_FromReflectedField(JNIEnv *env, jobject field))
468 JNIWrapper("FromReflectedField");
469
470 HOTSPOT_JNI_FROMREFLECTEDFIELD_ENTRY(env, field);
471
472 jfieldID ret = NULL;
473 DT_RETURN_MARK(FromReflectedField, jfieldID, (const jfieldID&)ret);
474
475 // field is a handle to a java.lang.reflect.Field object
476 oop reflected = JNIHandles::resolve_non_null(field);
477 oop mirror = java_lang_reflect_Field::clazz(reflected);
478 Klass* k1 = java_lang_Class::as_Klass(mirror);
479 int slot = java_lang_reflect_Field::slot(reflected);
480 int modifiers = java_lang_reflect_Field::modifiers(reflected);
481
482 // Make sure class is initialized before handing id's out to fields
483 k1->initialize(CHECK_NULL);
484
485 // First check if this is a static field
486 if (modifiers & JVM_ACC_STATIC) {
487 intptr_t offset = InstanceKlass::cast(k1)->field_offset( slot );
488 JNIid* id = InstanceKlass::cast(k1)->jni_id_for(offset);
489 assert(id != NULL, "corrupt Field object");
490 debug_only(id->set_is_static_field_id();)
491 // A jfieldID for a static field is a JNIid specifying the field holder and the offset within the Klass*
492 ret = jfieldIDWorkaround::to_static_jfieldID(id);
493 return ret;
494 }
495
496 // The slot is the index of the field description in the field-array
497 // The jfieldID is the offset of the field within the object
498 // It may also have hash bits for k, if VerifyJNIFields is turned on.
499 intptr_t offset = InstanceKlass::cast(k1)->field_offset( slot );
500 assert(InstanceKlass::cast(k1)->contains_field_offset(offset), "stay within object");
501 ret = jfieldIDWorkaround::to_instance_jfieldID(k1, offset);
502 return ret;
503 JNI_END
504
505
506 DT_RETURN_MARK_DECL(ToReflectedMethod, jobject
507 , HOTSPOT_JNI_TOREFLECTEDMETHOD_RETURN(_ret_ref));
508
509 JNI_ENTRY(jobject, jni_ToReflectedMethod(JNIEnv *env, jclass cls, jmethodID method_id, jboolean isStatic))
510 JNIWrapper("ToReflectedMethod");
511
512 HOTSPOT_JNI_TOREFLECTEDMETHOD_ENTRY(env, cls, (uintptr_t) method_id, isStatic);
513
514 jobject ret = NULL;
515 DT_RETURN_MARK(ToReflectedMethod, jobject, (const jobject&)ret);
516
517 methodHandle m (THREAD, Method::resolve_jmethod_id(method_id));
518 assert(m->is_static() == (isStatic != 0), "jni_ToReflectedMethod access flags doesn't match");
519 oop reflection_method;
520 if (m->is_initializer()) {
521 reflection_method = Reflection::new_constructor(m, CHECK_NULL);
522 } else {
523 reflection_method = Reflection::new_method(m, false, CHECK_NULL);
524 }
525 ret = JNIHandles::make_local(env, reflection_method);
526 return ret;
527 JNI_END
528
529 DT_RETURN_MARK_DECL(GetSuperclass, jclass
530 , HOTSPOT_JNI_GETSUPERCLASS_RETURN(_ret_ref));
531
532 JNI_ENTRY(jclass, jni_GetSuperclass(JNIEnv *env, jclass sub))
533 JNIWrapper("GetSuperclass");
534
535 HOTSPOT_JNI_GETSUPERCLASS_ENTRY(env, sub);
536
537 jclass obj = NULL;
538 DT_RETURN_MARK(GetSuperclass, jclass, (const jclass&)obj);
539
540 oop mirror = JNIHandles::resolve_non_null(sub);
541 // primitive classes return NULL
542 if (java_lang_Class::is_primitive(mirror)) return NULL;
543
544 // Rules of Class.getSuperClass as implemented by KLass::java_super:
545 // arrays return Object
546 // interfaces return NULL
547 // proper classes return Klass::super()
548 Klass* k = java_lang_Class::as_Klass(mirror);
549 if (k->is_interface()) return NULL;
550
551 // return mirror for superclass
552 Klass* super = k->java_super();
553 // super2 is the value computed by the compiler's getSuperClass intrinsic:
554 debug_only(Klass* super2 = ( k->is_array_klass()
555 ? SystemDictionary::Object_klass()
556 : k->super() ) );
557 assert(super == super2,
558 "java_super computation depends on interface, array, other super");
559 obj = (super == NULL) ? NULL : (jclass) JNIHandles::make_local(super->java_mirror());
560 return obj;
561 JNI_END
562
563 JNI_ENTRY_NO_PRESERVE(jboolean, jni_IsAssignableFrom(JNIEnv *env, jclass sub, jclass super))
564 JNIWrapper("IsSubclassOf");
565
566 HOTSPOT_JNI_ISASSIGNABLEFROM_ENTRY(env, sub, super);
567
568 oop sub_mirror = JNIHandles::resolve_non_null(sub);
569 oop super_mirror = JNIHandles::resolve_non_null(super);
570 if (java_lang_Class::is_primitive(sub_mirror) ||
571 java_lang_Class::is_primitive(super_mirror)) {
572 jboolean ret = (sub_mirror == super_mirror);
573
574 HOTSPOT_JNI_ISASSIGNABLEFROM_RETURN(ret);
575 return ret;
576 }
577 Klass* sub_klass = java_lang_Class::as_Klass(sub_mirror);
578 Klass* super_klass = java_lang_Class::as_Klass(super_mirror);
579 assert(sub_klass != NULL && super_klass != NULL, "invalid arguments to jni_IsAssignableFrom");
580 jboolean ret = sub_klass->is_subtype_of(super_klass) ?
581 JNI_TRUE : JNI_FALSE;
582
583 HOTSPOT_JNI_ISASSIGNABLEFROM_RETURN(ret);
584 return ret;
585 JNI_END
586
587
588 DT_RETURN_MARK_DECL(Throw, jint
589 , HOTSPOT_JNI_THROW_RETURN(_ret_ref));
590
591 JNI_ENTRY(jint, jni_Throw(JNIEnv *env, jthrowable obj))
592 JNIWrapper("Throw");
593
594 HOTSPOT_JNI_THROW_ENTRY(env, obj);
595
596 jint ret = JNI_OK;
597 DT_RETURN_MARK(Throw, jint, (const jint&)ret);
598
599 THROW_OOP_(JNIHandles::resolve(obj), JNI_OK);
600 ShouldNotReachHere();
601 return 0; // Mute compiler.
602 JNI_END
603
604
605 DT_RETURN_MARK_DECL(ThrowNew, jint
606 , HOTSPOT_JNI_THROWNEW_RETURN(_ret_ref));
607
608 JNI_ENTRY(jint, jni_ThrowNew(JNIEnv *env, jclass clazz, const char *message))
609 JNIWrapper("ThrowNew");
610
611 HOTSPOT_JNI_THROWNEW_ENTRY(env, clazz, (char *) message);
612
613 jint ret = JNI_OK;
614 DT_RETURN_MARK(ThrowNew, jint, (const jint&)ret);
615
616 InstanceKlass* k = InstanceKlass::cast(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz)));
617 Symbol* name = k->name();
618 Handle class_loader (THREAD, k->class_loader());
619 Handle protection_domain (THREAD, k->protection_domain());
620 THROW_MSG_LOADER_(name, (char *)message, class_loader, protection_domain, JNI_OK);
621 ShouldNotReachHere();
622 return 0; // Mute compiler.
623 JNI_END
624
625
626 // JNI functions only transform a pending async exception to a synchronous
627 // exception in ExceptionOccurred and ExceptionCheck calls, since
628 // delivering an async exception in other places won't change the native
629 // code's control flow and would be harmful when native code further calls
630 // JNI functions with a pending exception. Async exception is also checked
631 // during the call, so ExceptionOccurred/ExceptionCheck won't return
632 // false but deliver the async exception at the very end during
633 // state transition.
634
635 static void jni_check_async_exceptions(JavaThread *thread) {
636 assert(thread == Thread::current(), "must be itself");
637 thread->check_and_handle_async_exceptions();
638 }
639
640 JNI_ENTRY_NO_PRESERVE(jthrowable, jni_ExceptionOccurred(JNIEnv *env))
641 JNIWrapper("ExceptionOccurred");
642
643 HOTSPOT_JNI_EXCEPTIONOCCURRED_ENTRY(env);
644
645 jni_check_async_exceptions(thread);
646 oop exception = thread->pending_exception();
647 jthrowable ret = (jthrowable) JNIHandles::make_local(env, exception);
648
649 HOTSPOT_JNI_EXCEPTIONOCCURRED_RETURN(ret);
650 return ret;
651 JNI_END
652
653
654 JNI_ENTRY_NO_PRESERVE(void, jni_ExceptionDescribe(JNIEnv *env))
655 JNIWrapper("ExceptionDescribe");
656
657 HOTSPOT_JNI_EXCEPTIONDESCRIBE_ENTRY(env);
658
659 if (thread->has_pending_exception()) {
660 Handle ex(thread, thread->pending_exception());
661 thread->clear_pending_exception();
662 if (ex->is_a(SystemDictionary::ThreadDeath_klass())) {
663 // Don't print anything if we are being killed.
664 } else {
665 jio_fprintf(defaultStream::error_stream(), "Exception ");
666 if (thread != NULL && thread->threadObj() != NULL) {
667 ResourceMark rm(THREAD);
668 jio_fprintf(defaultStream::error_stream(),
669 "in thread \"%s\" ", thread->get_thread_name());
670 }
671 if (ex->is_a(SystemDictionary::Throwable_klass())) {
672 JavaValue result(T_VOID);
673 JavaCalls::call_virtual(&result,
674 ex,
675 SystemDictionary::Throwable_klass(),
676 vmSymbols::printStackTrace_name(),
677 vmSymbols::void_method_signature(),
678 THREAD);
679 // If an exception is thrown in the call it gets thrown away. Not much
680 // we can do with it. The native code that calls this, does not check
681 // for the exception - hence, it might still be in the thread when DestroyVM gets
682 // called, potentially causing a few asserts to trigger - since no pending exception
683 // is expected.
684 CLEAR_PENDING_EXCEPTION;
685 } else {
686 ResourceMark rm(THREAD);
687 jio_fprintf(defaultStream::error_stream(),
688 ". Uncaught exception of type %s.",
689 ex->klass()->external_name());
690 }
691 }
692 }
693
694 HOTSPOT_JNI_EXCEPTIONDESCRIBE_RETURN();
695 JNI_END
696
697
698 JNI_ENTRY_NO_PRESERVE(void, jni_ExceptionClear(JNIEnv *env))
699 JNIWrapper("ExceptionClear");
700
701 HOTSPOT_JNI_EXCEPTIONCLEAR_ENTRY(env);
702
703 // The jni code might be using this API to clear java thrown exception.
704 // So just mark jvmti thread exception state as exception caught.
705 JvmtiThreadState *state = JavaThread::current()->jvmti_thread_state();
706 if (state != NULL && state->is_exception_detected()) {
707 state->set_exception_caught();
708 }
709 thread->clear_pending_exception();
710
711 HOTSPOT_JNI_EXCEPTIONCLEAR_RETURN();
712 JNI_END
713
714
715 JNI_ENTRY(void, jni_FatalError(JNIEnv *env, const char *msg))
716 JNIWrapper("FatalError");
717
718 HOTSPOT_JNI_FATALERROR_ENTRY(env, (char *) msg);
719
720 tty->print_cr("FATAL ERROR in native method: %s", msg);
721 thread->print_stack();
722 os::abort(); // Dump core and abort
723 JNI_END
724
725
726 JNI_ENTRY(jint, jni_PushLocalFrame(JNIEnv *env, jint capacity))
727 JNIWrapper("PushLocalFrame");
728
729 HOTSPOT_JNI_PUSHLOCALFRAME_ENTRY(env, capacity);
730
731 //%note jni_11
732 if (capacity < 0 ||
733 ((MaxJNILocalCapacity > 0) && (capacity > MaxJNILocalCapacity))) {
734 HOTSPOT_JNI_PUSHLOCALFRAME_RETURN((uint32_t)JNI_ERR);
735 return JNI_ERR;
736 }
737 JNIHandleBlock* old_handles = thread->active_handles();
738 JNIHandleBlock* new_handles = JNIHandleBlock::allocate_block(thread);
739 assert(new_handles != NULL, "should not be NULL");
740 new_handles->set_pop_frame_link(old_handles);
741 thread->set_active_handles(new_handles);
742 jint ret = JNI_OK;
743 HOTSPOT_JNI_PUSHLOCALFRAME_RETURN(ret);
744 return ret;
745 JNI_END
746
747
748 JNI_ENTRY(jobject, jni_PopLocalFrame(JNIEnv *env, jobject result))
749 JNIWrapper("PopLocalFrame");
750
751 HOTSPOT_JNI_POPLOCALFRAME_ENTRY(env, result);
752
753 //%note jni_11
754 Handle result_handle(thread, JNIHandles::resolve(result));
755 JNIHandleBlock* old_handles = thread->active_handles();
756 JNIHandleBlock* new_handles = old_handles->pop_frame_link();
757 if (new_handles != NULL) {
758 // As a sanity check we only release the handle blocks if the pop_frame_link is not NULL.
759 // This way code will still work if PopLocalFrame is called without a corresponding
760 // PushLocalFrame call. Note that we set the pop_frame_link to NULL explicitly, otherwise
761 // the release_block call will release the blocks.
762 thread->set_active_handles(new_handles);
763 old_handles->set_pop_frame_link(NULL); // clear link we won't release new_handles below
764 JNIHandleBlock::release_block(old_handles, thread); // may block
765 result = JNIHandles::make_local(thread, result_handle());
766 }
767 HOTSPOT_JNI_POPLOCALFRAME_RETURN(result);
768 return result;
769 JNI_END
770
771
772 JNI_ENTRY(jobject, jni_NewGlobalRef(JNIEnv *env, jobject ref))
773 JNIWrapper("NewGlobalRef");
774
775 HOTSPOT_JNI_NEWGLOBALREF_ENTRY(env, ref);
776
777 Handle ref_handle(thread, JNIHandles::resolve(ref));
778 jobject ret = JNIHandles::make_global(ref_handle);
779
780 HOTSPOT_JNI_NEWGLOBALREF_RETURN(ret);
781 return ret;
782 JNI_END
783
784 // Must be JNI_ENTRY (with HandleMark)
785 JNI_ENTRY_NO_PRESERVE(void, jni_DeleteGlobalRef(JNIEnv *env, jobject ref))
786 JNIWrapper("DeleteGlobalRef");
787
788 HOTSPOT_JNI_DELETEGLOBALREF_ENTRY(env, ref);
789
790 JNIHandles::destroy_global(ref);
791
792 HOTSPOT_JNI_DELETEGLOBALREF_RETURN();
793 JNI_END
794
795 JNI_ENTRY_NO_PRESERVE(void, jni_DeleteLocalRef(JNIEnv *env, jobject obj))
796 JNIWrapper("DeleteLocalRef");
797
798 HOTSPOT_JNI_DELETELOCALREF_ENTRY(env, obj);
799
800 JNIHandles::destroy_local(obj);
801
802 HOTSPOT_JNI_DELETELOCALREF_RETURN();
803 JNI_END
804
805 JNI_ENTRY_NO_PRESERVE(jboolean, jni_IsSameObject(JNIEnv *env, jobject r1, jobject r2))
806 JNIWrapper("IsSameObject");
807
808 HOTSPOT_JNI_ISSAMEOBJECT_ENTRY(env, r1, r2);
809
810 jboolean ret = JNIHandles::is_same_object(r1, r2) ? JNI_TRUE : JNI_FALSE;
811
812 HOTSPOT_JNI_ISSAMEOBJECT_RETURN(ret);
813 return ret;
814 JNI_END
815
816
817 JNI_ENTRY(jobject, jni_NewLocalRef(JNIEnv *env, jobject ref))
818 JNIWrapper("NewLocalRef");
819
820 HOTSPOT_JNI_NEWLOCALREF_ENTRY(env, ref);
821
822 jobject ret = JNIHandles::make_local(env, JNIHandles::resolve(ref));
823
824 HOTSPOT_JNI_NEWLOCALREF_RETURN(ret);
825 return ret;
826 JNI_END
827
828 JNI_LEAF(jint, jni_EnsureLocalCapacity(JNIEnv *env, jint capacity))
829 JNIWrapper("EnsureLocalCapacity");
830
831 HOTSPOT_JNI_ENSURELOCALCAPACITY_ENTRY(env, capacity);
832
833 jint ret;
834 if (capacity >= 0 &&
835 ((MaxJNILocalCapacity <= 0) || (capacity <= MaxJNILocalCapacity))) {
836 ret = JNI_OK;
837 } else {
838 ret = JNI_ERR;
839 }
840
841 HOTSPOT_JNI_ENSURELOCALCAPACITY_RETURN(ret);
842 return ret;
843 JNI_END
844
845 // Return the Handle Type
846 JNI_LEAF(jobjectRefType, jni_GetObjectRefType(JNIEnv *env, jobject obj))
847 JNIWrapper("GetObjectRefType");
848
849 HOTSPOT_JNI_GETOBJECTREFTYPE_ENTRY(env, obj);
850
851 jobjectRefType ret = JNIInvalidRefType;
852 if (obj != NULL) {
853 ret = JNIHandles::handle_type(thread, obj);
854 }
855
856 HOTSPOT_JNI_GETOBJECTREFTYPE_RETURN((void *) ret);
857 return ret;
858 JNI_END
859
860
861 class JNI_ArgumentPusher : public SignatureIterator {
862 protected:
863 JavaCallArguments* _arguments;
864
865 void push_int(jint x) { _arguments->push_int(x); }
866 void push_long(jlong x) { _arguments->push_long(x); }
867 void push_float(jfloat x) { _arguments->push_float(x); }
868 void push_double(jdouble x) { _arguments->push_double(x); }
869 void push_object(jobject x) { _arguments->push_jobject(x); }
870
871 void push_boolean(jboolean b) {
872 // Normalize boolean arguments from native code by converting 1-255 to JNI_TRUE and
873 // 0 to JNI_FALSE. Boolean return values from native are normalized the same in
874 // TemplateInterpreterGenerator::generate_result_handler_for and
875 // SharedRuntime::generate_native_wrapper.
876 push_int(b == 0 ? JNI_FALSE : JNI_TRUE);
877 }
878
879 JNI_ArgumentPusher(Method* method)
880 : SignatureIterator(method->signature(),
881 Fingerprinter(methodHandle(Thread::current(), method)).fingerprint())
882 {
883 _arguments = NULL;
884 }
885
886 public:
887 virtual void push_arguments_on(JavaCallArguments* arguments) = 0;
888 };
889
890
891 class JNI_ArgumentPusherVaArg : public JNI_ArgumentPusher {
892 protected:
893 va_list _ap;
894
895 void set_ap(va_list rap) {
896 va_copy(_ap, rap);
897 }
898
899 friend class SignatureIterator; // so do_parameters_on can call do_type
900 void do_type(BasicType type) {
901 switch (type) {
902 // these are coerced to int when using va_arg
903 case T_BYTE:
904 case T_CHAR:
905 case T_SHORT:
906 case T_INT: push_int(va_arg(_ap, jint)); break;
907 case T_BOOLEAN: push_boolean((jboolean) va_arg(_ap, jint)); break;
908
909 // each of these paths is exercised by the various jck Call[Static,Nonvirtual,][Void,Int,..]Method[A,V,] tests
910
911 case T_LONG: push_long(va_arg(_ap, jlong)); break;
912 // float is coerced to double w/ va_arg
913 case T_FLOAT: push_float((jfloat) va_arg(_ap, jdouble)); break;
914 case T_DOUBLE: push_double(va_arg(_ap, jdouble)); break;
915
916 case T_ARRAY:
917 case T_OBJECT: push_object(va_arg(_ap, jobject)); break;
918 default: ShouldNotReachHere();
919 }
920 }
921
922 public:
923 JNI_ArgumentPusherVaArg(jmethodID method_id, va_list rap)
924 : JNI_ArgumentPusher(Method::resolve_jmethod_id(method_id)) {
925 set_ap(rap);
926 }
927
928 virtual void push_arguments_on(JavaCallArguments* arguments) {
929 _arguments = arguments;
930 do_parameters_on(this);
931 }
932 };
933
934
935 class JNI_ArgumentPusherArray : public JNI_ArgumentPusher {
936 protected:
937 const jvalue *_ap;
938
939 inline void set_ap(const jvalue *rap) { _ap = rap; }
940
941 friend class SignatureIterator; // so do_parameters_on can call do_type
942 void do_type(BasicType type) {
943 switch (type) {
944 case T_CHAR: push_int((_ap++)->c); break;
945 case T_SHORT: push_int((_ap++)->s); break;
946 case T_BYTE: push_int((_ap++)->b); break;
947 case T_INT: push_int((_ap++)->i); break;
948 case T_BOOLEAN: push_boolean((_ap++)->z); break;
949 case T_LONG: push_long((_ap++)->j); break;
950 case T_FLOAT: push_float((_ap++)->f); break;
951 case T_DOUBLE: push_double((_ap++)->d); break;
952 case T_ARRAY:
953 case T_OBJECT: push_object((_ap++)->l); break;
954 default: ShouldNotReachHere();
955 }
956 }
957
958 public:
959 JNI_ArgumentPusherArray(jmethodID method_id, const jvalue *rap)
960 : JNI_ArgumentPusher(Method::resolve_jmethod_id(method_id)) {
961 set_ap(rap);
962 }
963
964 virtual void push_arguments_on(JavaCallArguments* arguments) {
965 _arguments = arguments;
966 do_parameters_on(this);
967 }
968 };
969
970
971 enum JNICallType {
972 JNI_STATIC,
973 JNI_VIRTUAL,
974 JNI_NONVIRTUAL
975 };
976
977
978
979 static void jni_invoke_static(JNIEnv *env, JavaValue* result, jobject receiver, JNICallType call_type, jmethodID method_id, JNI_ArgumentPusher *args, TRAPS) {
980 methodHandle method(THREAD, Method::resolve_jmethod_id(method_id));
981
982 // Create object to hold arguments for the JavaCall, and associate it with
983 // the jni parser
984 ResourceMark rm(THREAD);
985 int number_of_parameters = method->size_of_parameters();
986 JavaCallArguments java_args(number_of_parameters);
987
988 assert(method->is_static(), "method should be static");
989
990 // Fill out JavaCallArguments object
991 args->push_arguments_on(&java_args);
992 // Initialize result type
993 result->set_type(args->return_type());
994
995 // Invoke the method. Result is returned as oop.
996 JavaCalls::call(result, method, &java_args, CHECK);
997
998 // Convert result
999 if (is_reference_type(result->get_type())) {
1000 result->set_jobject(JNIHandles::make_local(env, (oop) result->get_jobject()));
1001 }
1002 }
1003
1004
1005 static void jni_invoke_nonstatic(JNIEnv *env, JavaValue* result, jobject receiver, JNICallType call_type, jmethodID method_id, JNI_ArgumentPusher *args, TRAPS) {
1006 oop recv = JNIHandles::resolve(receiver);
1007 if (recv == NULL) {
1008 THROW(vmSymbols::java_lang_NullPointerException());
1009 }
1010 Handle h_recv(THREAD, recv);
1011
1012 int number_of_parameters;
1013 Method* selected_method;
1014 {
1015 Method* m = Method::resolve_jmethod_id(method_id);
1016 number_of_parameters = m->size_of_parameters();
1017 Klass* holder = m->method_holder();
1018 if (call_type != JNI_VIRTUAL) {
1019 selected_method = m;
1020 } else if (!m->has_itable_index()) {
1021 // non-interface call -- for that little speed boost, don't handlize
1022 debug_only(NoSafepointVerifier nosafepoint;)
1023 // jni_GetMethodID makes sure class is linked and initialized
1024 // so m should have a valid vtable index.
1025 assert(m->valid_vtable_index(), "no valid vtable index");
1026 int vtbl_index = m->vtable_index();
1027 if (vtbl_index != Method::nonvirtual_vtable_index) {
1028 selected_method = h_recv->klass()->method_at_vtable(vtbl_index);
1029 } else {
1030 // final method
1031 selected_method = m;
1032 }
1033 } else {
1034 // interface call
1035 int itbl_index = m->itable_index();
1036 Klass* k = h_recv->klass();
1037 selected_method = InstanceKlass::cast(k)->method_at_itable(holder, itbl_index, CHECK);
1038 }
1039 }
1040
1041 methodHandle method(THREAD, selected_method);
1042
1043 // Create object to hold arguments for the JavaCall, and associate it with
1044 // the jni parser
1045 ResourceMark rm(THREAD);
1046 JavaCallArguments java_args(number_of_parameters);
1047
1048 // handle arguments
1049 assert(!method->is_static(), "method %s should not be static", method->name_and_sig_as_C_string());
1050 java_args.push_oop(h_recv); // Push jobject handle
1051
1052 // Fill out JavaCallArguments object
1053 args->push_arguments_on(&java_args);
1054 // Initialize result type
1055 result->set_type(args->return_type());
1056
1057 // Invoke the method. Result is returned as oop.
1058 JavaCalls::call(result, method, &java_args, CHECK);
1059
1060 // Convert result
1061 if (is_reference_type(result->get_type())) {
1062 result->set_jobject(JNIHandles::make_local(env, (oop) result->get_jobject()));
1063 }
1064 }
1065
1066
1067 static instanceOop alloc_object(jclass clazz, TRAPS) {
1068 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz));
1069 if (k == NULL) {
1070 ResourceMark rm(THREAD);
1071 THROW_(vmSymbols::java_lang_InstantiationException(), NULL);
1072 }
1073 k->check_valid_for_instantiation(false, CHECK_NULL);
1074 k->initialize(CHECK_NULL);
1075 instanceOop ih = InstanceKlass::cast(k)->allocate_instance(THREAD);
1076 return ih;
1077 }
1078
1079 DT_RETURN_MARK_DECL(AllocObject, jobject
1080 , HOTSPOT_JNI_ALLOCOBJECT_RETURN(_ret_ref));
1081
1082 JNI_ENTRY(jobject, jni_AllocObject(JNIEnv *env, jclass clazz))
1083 JNIWrapper("AllocObject");
1084
1085 HOTSPOT_JNI_ALLOCOBJECT_ENTRY(env, clazz);
1086
1087 jobject ret = NULL;
1088 DT_RETURN_MARK(AllocObject, jobject, (const jobject&)ret);
1089
1090 instanceOop i = alloc_object(clazz, CHECK_NULL);
1091 ret = JNIHandles::make_local(env, i);
1092 return ret;
1093 JNI_END
1094
1095 DT_RETURN_MARK_DECL(NewObjectA, jobject
1096 , HOTSPOT_JNI_NEWOBJECTA_RETURN(_ret_ref));
1097
1098 JNI_ENTRY(jobject, jni_NewObjectA(JNIEnv *env, jclass clazz, jmethodID methodID, const jvalue *args))
1099 JNIWrapper("NewObjectA");
1100
1101 HOTSPOT_JNI_NEWOBJECTA_ENTRY(env, clazz, (uintptr_t) methodID);
1102
1103 jobject obj = NULL;
1104 DT_RETURN_MARK(NewObjectA, jobject, (const jobject)obj);
1105
1106 instanceOop i = alloc_object(clazz, CHECK_NULL);
1107 obj = JNIHandles::make_local(env, i);
1108 JavaValue jvalue(T_VOID);
1109 JNI_ArgumentPusherArray ap(methodID, args);
1110 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_NULL);
1111 return obj;
1112 JNI_END
1113
1114
1115 DT_RETURN_MARK_DECL(NewObjectV, jobject
1116 , HOTSPOT_JNI_NEWOBJECTV_RETURN(_ret_ref));
1117
1118 JNI_ENTRY(jobject, jni_NewObjectV(JNIEnv *env, jclass clazz, jmethodID methodID, va_list args))
1119 JNIWrapper("NewObjectV");
1120
1121 HOTSPOT_JNI_NEWOBJECTV_ENTRY(env, clazz, (uintptr_t) methodID);
1122
1123 jobject obj = NULL;
1124 DT_RETURN_MARK(NewObjectV, jobject, (const jobject&)obj);
1125
1126 instanceOop i = alloc_object(clazz, CHECK_NULL);
1127 obj = JNIHandles::make_local(env, i);
1128 JavaValue jvalue(T_VOID);
1129 JNI_ArgumentPusherVaArg ap(methodID, args);
1130 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_NULL);
1131 return obj;
1132 JNI_END
1133
1134
1135 DT_RETURN_MARK_DECL(NewObject, jobject
1136 , HOTSPOT_JNI_NEWOBJECT_RETURN(_ret_ref));
1137
1138 JNI_ENTRY(jobject, jni_NewObject(JNIEnv *env, jclass clazz, jmethodID methodID, ...))
1139 JNIWrapper("NewObject");
1140
1141 HOTSPOT_JNI_NEWOBJECT_ENTRY(env, clazz, (uintptr_t) methodID);
1142
1143 jobject obj = NULL;
1144 DT_RETURN_MARK(NewObject, jobject, (const jobject&)obj);
1145
1146 instanceOop i = alloc_object(clazz, CHECK_NULL);
1147 obj = JNIHandles::make_local(env, i);
1148 va_list args;
1149 va_start(args, methodID);
1150 JavaValue jvalue(T_VOID);
1151 JNI_ArgumentPusherVaArg ap(methodID, args);
1152 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_NULL);
1153 va_end(args);
1154 return obj;
1155 JNI_END
1156
1157
1158 JNI_ENTRY(jclass, jni_GetObjectClass(JNIEnv *env, jobject obj))
1159 JNIWrapper("GetObjectClass");
1160
1161 HOTSPOT_JNI_GETOBJECTCLASS_ENTRY(env, obj);
1162
1163 Klass* k = JNIHandles::resolve_non_null(obj)->klass();
1164 jclass ret =
1165 (jclass) JNIHandles::make_local(env, k->java_mirror());
1166
1167 HOTSPOT_JNI_GETOBJECTCLASS_RETURN(ret);
1168 return ret;
1169 JNI_END
1170
1171 JNI_ENTRY_NO_PRESERVE(jboolean, jni_IsInstanceOf(JNIEnv *env, jobject obj, jclass clazz))
1172 JNIWrapper("IsInstanceOf");
1173
1174 HOTSPOT_JNI_ISINSTANCEOF_ENTRY(env, obj, clazz);
1175
1176 jboolean ret = JNI_TRUE;
1177 if (obj != NULL) {
1178 ret = JNI_FALSE;
1179 Klass* k = java_lang_Class::as_Klass(
1180 JNIHandles::resolve_non_null(clazz));
1181 if (k != NULL) {
1182 ret = JNIHandles::resolve_non_null(obj)->is_a(k) ? JNI_TRUE : JNI_FALSE;
1183 }
1184 }
1185
1186 HOTSPOT_JNI_ISINSTANCEOF_RETURN(ret);
1187 return ret;
1188 JNI_END
1189
1190
1191 static jmethodID get_method_id(JNIEnv *env, jclass clazz, const char *name_str,
1192 const char *sig, bool is_static, TRAPS) {
1193 // %%%% This code should probably just call into a method in the LinkResolver
1194 //
1195 // The class should have been loaded (we have an instance of the class
1196 // passed in) so the method and signature should already be in the symbol
1197 // table. If they're not there, the method doesn't exist.
1198 const char *name_to_probe = (name_str == NULL)
1199 ? vmSymbols::object_initializer_name()->as_C_string()
1200 : name_str;
1201 TempNewSymbol name = SymbolTable::probe(name_to_probe, (int)strlen(name_to_probe));
1202 TempNewSymbol signature = SymbolTable::probe(sig, (int)strlen(sig));
1203
1204 if (name == NULL || signature == NULL) {
1205 THROW_MSG_0(vmSymbols::java_lang_NoSuchMethodError(), name_str);
1206 }
1207
1208 Klass* klass = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz));
1209
1210 // Throw a NoSuchMethodError exception if we have an instance of a
1211 // primitive java.lang.Class
1212 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(clazz))) {
1213 ResourceMark rm;
1214 THROW_MSG_0(vmSymbols::java_lang_NoSuchMethodError(), err_msg("%s%s.%s%s", is_static ? "static " : "", klass->signature_name(), name_str, sig));
1215 }
1216
1217 // Make sure class is linked and initialized before handing id's out to
1218 // Method*s.
1219 klass->initialize(CHECK_NULL);
1220
1221 Method* m;
1222 if (name == vmSymbols::object_initializer_name() ||
1223 name == vmSymbols::class_initializer_name()) {
1224 // Never search superclasses for constructors
1225 if (klass->is_instance_klass()) {
1226 m = InstanceKlass::cast(klass)->find_method(name, signature);
1227 } else {
1228 m = NULL;
1229 }
1230 } else {
1231 m = klass->lookup_method(name, signature);
1232 if (m == NULL && klass->is_instance_klass()) {
1233 m = InstanceKlass::cast(klass)->lookup_method_in_ordered_interfaces(name, signature);
1234 }
1235 }
1236 if (m == NULL || (m->is_static() != is_static)) {
1237 ResourceMark rm;
1238 THROW_MSG_0(vmSymbols::java_lang_NoSuchMethodError(), err_msg("%s%s.%s%s", is_static ? "static " : "", klass->signature_name(), name_str, sig));
1239 }
1240 return m->jmethod_id();
1241 }
1242
1243
1244 JNI_ENTRY(jmethodID, jni_GetMethodID(JNIEnv *env, jclass clazz,
1245 const char *name, const char *sig))
1246 JNIWrapper("GetMethodID");
1247 HOTSPOT_JNI_GETMETHODID_ENTRY(env, clazz, (char *) name, (char *) sig);
1248 jmethodID ret = get_method_id(env, clazz, name, sig, false, thread);
1249 HOTSPOT_JNI_GETMETHODID_RETURN((uintptr_t) ret);
1250 return ret;
1251 JNI_END
1252
1253
1254 JNI_ENTRY(jmethodID, jni_GetStaticMethodID(JNIEnv *env, jclass clazz,
1255 const char *name, const char *sig))
1256 JNIWrapper("GetStaticMethodID");
1257 HOTSPOT_JNI_GETSTATICMETHODID_ENTRY(env, (char *) clazz, (char *) name, (char *)sig);
1258 jmethodID ret = get_method_id(env, clazz, name, sig, true, thread);
1259 HOTSPOT_JNI_GETSTATICMETHODID_RETURN((uintptr_t) ret);
1260 return ret;
1261 JNI_END
1262
1263
1264
1265 //
1266 // Calling Methods
1267 //
1268
1269
1270 #define DEFINE_CALLMETHOD(ResultType, Result, Tag \
1271 , EntryProbe, ReturnProbe) \
1272 \
1273 DT_RETURN_MARK_DECL_FOR(Result, Call##Result##Method, ResultType \
1274 , ReturnProbe); \
1275 \
1276 JNI_ENTRY(ResultType, \
1277 jni_Call##Result##Method(JNIEnv *env, jobject obj, jmethodID methodID, ...)) \
1278 JNIWrapper("Call" XSTR(Result) "Method"); \
1279 \
1280 EntryProbe; \
1281 ResultType ret = 0;\
1282 DT_RETURN_MARK_FOR(Result, Call##Result##Method, ResultType, \
1283 (const ResultType&)ret);\
1284 \
1285 va_list args; \
1286 va_start(args, methodID); \
1287 JavaValue jvalue(Tag); \
1288 JNI_ArgumentPusherVaArg ap(methodID, args); \
1289 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK_0); \
1290 va_end(args); \
1291 ret = jvalue.get_##ResultType(); \
1292 return ret;\
1293 JNI_END
1294
1295 // the runtime type of subword integral basic types is integer
1296 DEFINE_CALLMETHOD(jboolean, Boolean, T_BOOLEAN
1297 , HOTSPOT_JNI_CALLBOOLEANMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1298 HOTSPOT_JNI_CALLBOOLEANMETHOD_RETURN(_ret_ref))
1299 DEFINE_CALLMETHOD(jbyte, Byte, T_BYTE
1300 , HOTSPOT_JNI_CALLBYTEMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1301 HOTSPOT_JNI_CALLBYTEMETHOD_RETURN(_ret_ref))
1302 DEFINE_CALLMETHOD(jchar, Char, T_CHAR
1303 , HOTSPOT_JNI_CALLCHARMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1304 HOTSPOT_JNI_CALLCHARMETHOD_RETURN(_ret_ref))
1305 DEFINE_CALLMETHOD(jshort, Short, T_SHORT
1306 , HOTSPOT_JNI_CALLSHORTMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1307 HOTSPOT_JNI_CALLSHORTMETHOD_RETURN(_ret_ref))
1308
1309 DEFINE_CALLMETHOD(jobject, Object, T_OBJECT
1310 , HOTSPOT_JNI_CALLOBJECTMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1311 HOTSPOT_JNI_CALLOBJECTMETHOD_RETURN(_ret_ref))
1312 DEFINE_CALLMETHOD(jint, Int, T_INT,
1313 HOTSPOT_JNI_CALLINTMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1314 HOTSPOT_JNI_CALLINTMETHOD_RETURN(_ret_ref))
1315 DEFINE_CALLMETHOD(jlong, Long, T_LONG
1316 , HOTSPOT_JNI_CALLLONGMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1317 HOTSPOT_JNI_CALLLONGMETHOD_RETURN(_ret_ref))
1318 // Float and double probes don't return value because dtrace doesn't currently support it
1319 DEFINE_CALLMETHOD(jfloat, Float, T_FLOAT
1320 , HOTSPOT_JNI_CALLFLOATMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1321 HOTSPOT_JNI_CALLFLOATMETHOD_RETURN())
1322 DEFINE_CALLMETHOD(jdouble, Double, T_DOUBLE
1323 , HOTSPOT_JNI_CALLDOUBLEMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1324 HOTSPOT_JNI_CALLDOUBLEMETHOD_RETURN())
1325
1326 #define DEFINE_CALLMETHODV(ResultType, Result, Tag \
1327 , EntryProbe, ReturnProbe) \
1328 \
1329 DT_RETURN_MARK_DECL_FOR(Result, Call##Result##MethodV, ResultType \
1330 , ReturnProbe); \
1331 \
1332 JNI_ENTRY(ResultType, \
1333 jni_Call##Result##MethodV(JNIEnv *env, jobject obj, jmethodID methodID, va_list args)) \
1334 JNIWrapper("Call" XSTR(Result) "MethodV"); \
1335 \
1336 EntryProbe;\
1337 ResultType ret = 0;\
1338 DT_RETURN_MARK_FOR(Result, Call##Result##MethodV, ResultType, \
1339 (const ResultType&)ret);\
1340 \
1341 JavaValue jvalue(Tag); \
1342 JNI_ArgumentPusherVaArg ap(methodID, args); \
1343 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK_0); \
1344 ret = jvalue.get_##ResultType(); \
1345 return ret;\
1346 JNI_END
1347
1348 // the runtime type of subword integral basic types is integer
1349 DEFINE_CALLMETHODV(jboolean, Boolean, T_BOOLEAN
1350 , HOTSPOT_JNI_CALLBOOLEANMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1351 HOTSPOT_JNI_CALLBOOLEANMETHODV_RETURN(_ret_ref))
1352 DEFINE_CALLMETHODV(jbyte, Byte, T_BYTE
1353 , HOTSPOT_JNI_CALLBYTEMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1354 HOTSPOT_JNI_CALLBYTEMETHODV_RETURN(_ret_ref))
1355 DEFINE_CALLMETHODV(jchar, Char, T_CHAR
1356 , HOTSPOT_JNI_CALLCHARMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1357 HOTSPOT_JNI_CALLCHARMETHODV_RETURN(_ret_ref))
1358 DEFINE_CALLMETHODV(jshort, Short, T_SHORT
1359 , HOTSPOT_JNI_CALLSHORTMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1360 HOTSPOT_JNI_CALLSHORTMETHODV_RETURN(_ret_ref))
1361
1362 DEFINE_CALLMETHODV(jobject, Object, T_OBJECT
1363 , HOTSPOT_JNI_CALLOBJECTMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1364 HOTSPOT_JNI_CALLOBJECTMETHODV_RETURN(_ret_ref))
1365 DEFINE_CALLMETHODV(jint, Int, T_INT,
1366 HOTSPOT_JNI_CALLINTMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1367 HOTSPOT_JNI_CALLINTMETHODV_RETURN(_ret_ref))
1368 DEFINE_CALLMETHODV(jlong, Long, T_LONG
1369 , HOTSPOT_JNI_CALLLONGMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1370 HOTSPOT_JNI_CALLLONGMETHODV_RETURN(_ret_ref))
1371 // Float and double probes don't return value because dtrace doesn't currently support it
1372 DEFINE_CALLMETHODV(jfloat, Float, T_FLOAT
1373 , HOTSPOT_JNI_CALLFLOATMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1374 HOTSPOT_JNI_CALLFLOATMETHODV_RETURN())
1375 DEFINE_CALLMETHODV(jdouble, Double, T_DOUBLE
1376 , HOTSPOT_JNI_CALLDOUBLEMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1377 HOTSPOT_JNI_CALLDOUBLEMETHODV_RETURN())
1378
1379 #define DEFINE_CALLMETHODA(ResultType, Result, Tag \
1380 , EntryProbe, ReturnProbe) \
1381 \
1382 DT_RETURN_MARK_DECL_FOR(Result, Call##Result##MethodA, ResultType \
1383 , ReturnProbe); \
1384 \
1385 JNI_ENTRY(ResultType, \
1386 jni_Call##Result##MethodA(JNIEnv *env, jobject obj, jmethodID methodID, const jvalue *args)) \
1387 JNIWrapper("Call" XSTR(Result) "MethodA"); \
1388 EntryProbe; \
1389 ResultType ret = 0;\
1390 DT_RETURN_MARK_FOR(Result, Call##Result##MethodA, ResultType, \
1391 (const ResultType&)ret);\
1392 \
1393 JavaValue jvalue(Tag); \
1394 JNI_ArgumentPusherArray ap(methodID, args); \
1395 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK_0); \
1396 ret = jvalue.get_##ResultType(); \
1397 return ret;\
1398 JNI_END
1399
1400 // the runtime type of subword integral basic types is integer
1401 DEFINE_CALLMETHODA(jboolean, Boolean, T_BOOLEAN
1402 , HOTSPOT_JNI_CALLBOOLEANMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1403 HOTSPOT_JNI_CALLBOOLEANMETHODA_RETURN(_ret_ref))
1404 DEFINE_CALLMETHODA(jbyte, Byte, T_BYTE
1405 , HOTSPOT_JNI_CALLBYTEMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1406 HOTSPOT_JNI_CALLBYTEMETHODA_RETURN(_ret_ref))
1407 DEFINE_CALLMETHODA(jchar, Char, T_CHAR
1408 , HOTSPOT_JNI_CALLCHARMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1409 HOTSPOT_JNI_CALLCHARMETHODA_RETURN(_ret_ref))
1410 DEFINE_CALLMETHODA(jshort, Short, T_SHORT
1411 , HOTSPOT_JNI_CALLSHORTMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1412 HOTSPOT_JNI_CALLSHORTMETHODA_RETURN(_ret_ref))
1413
1414 DEFINE_CALLMETHODA(jobject, Object, T_OBJECT
1415 , HOTSPOT_JNI_CALLOBJECTMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1416 HOTSPOT_JNI_CALLOBJECTMETHODA_RETURN(_ret_ref))
1417 DEFINE_CALLMETHODA(jint, Int, T_INT,
1418 HOTSPOT_JNI_CALLINTMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1419 HOTSPOT_JNI_CALLINTMETHODA_RETURN(_ret_ref))
1420 DEFINE_CALLMETHODA(jlong, Long, T_LONG
1421 , HOTSPOT_JNI_CALLLONGMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1422 HOTSPOT_JNI_CALLLONGMETHODA_RETURN(_ret_ref))
1423 // Float and double probes don't return value because dtrace doesn't currently support it
1424 DEFINE_CALLMETHODA(jfloat, Float, T_FLOAT
1425 , HOTSPOT_JNI_CALLFLOATMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1426 HOTSPOT_JNI_CALLFLOATMETHODA_RETURN())
1427 DEFINE_CALLMETHODA(jdouble, Double, T_DOUBLE
1428 , HOTSPOT_JNI_CALLDOUBLEMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1429 HOTSPOT_JNI_CALLDOUBLEMETHODA_RETURN())
1430
1431 DT_VOID_RETURN_MARK_DECL(CallVoidMethod, HOTSPOT_JNI_CALLVOIDMETHOD_RETURN());
1432 DT_VOID_RETURN_MARK_DECL(CallVoidMethodV, HOTSPOT_JNI_CALLVOIDMETHODV_RETURN());
1433 DT_VOID_RETURN_MARK_DECL(CallVoidMethodA, HOTSPOT_JNI_CALLVOIDMETHODA_RETURN());
1434
1435
1436 JNI_ENTRY(void, jni_CallVoidMethod(JNIEnv *env, jobject obj, jmethodID methodID, ...))
1437 JNIWrapper("CallVoidMethod");
1438 HOTSPOT_JNI_CALLVOIDMETHOD_ENTRY(env, obj, (uintptr_t) methodID);
1439 DT_VOID_RETURN_MARK(CallVoidMethod);
1440
1441 va_list args;
1442 va_start(args, methodID);
1443 JavaValue jvalue(T_VOID);
1444 JNI_ArgumentPusherVaArg ap(methodID, args);
1445 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK);
1446 va_end(args);
1447 JNI_END
1448
1449
1450 JNI_ENTRY(void, jni_CallVoidMethodV(JNIEnv *env, jobject obj, jmethodID methodID, va_list args))
1451 JNIWrapper("CallVoidMethodV");
1452 HOTSPOT_JNI_CALLVOIDMETHODV_ENTRY(env, obj, (uintptr_t) methodID);
1453 DT_VOID_RETURN_MARK(CallVoidMethodV);
1454
1455 JavaValue jvalue(T_VOID);
1456 JNI_ArgumentPusherVaArg ap(methodID, args);
1457 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK);
1458 JNI_END
1459
1460
1461 JNI_ENTRY(void, jni_CallVoidMethodA(JNIEnv *env, jobject obj, jmethodID methodID, const jvalue *args))
1462 JNIWrapper("CallVoidMethodA");
1463 HOTSPOT_JNI_CALLVOIDMETHODA_ENTRY(env, obj, (uintptr_t) methodID);
1464 DT_VOID_RETURN_MARK(CallVoidMethodA);
1465
1466 JavaValue jvalue(T_VOID);
1467 JNI_ArgumentPusherArray ap(methodID, args);
1468 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK);
1469 JNI_END
1470
1471
1472
1473 #define DEFINE_CALLNONVIRTUALMETHOD(ResultType, Result, Tag \
1474 , EntryProbe, ReturnProbe) \
1475 \
1476 DT_RETURN_MARK_DECL_FOR(Result, CallNonvirtual##Result##Method, ResultType \
1477 , ReturnProbe);\
1478 \
1479 JNI_ENTRY(ResultType, \
1480 jni_CallNonvirtual##Result##Method(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, ...)) \
1481 JNIWrapper("CallNonvitual" XSTR(Result) "Method"); \
1482 \
1483 EntryProbe;\
1484 ResultType ret;\
1485 DT_RETURN_MARK_FOR(Result, CallNonvirtual##Result##Method, ResultType, \
1486 (const ResultType&)ret);\
1487 \
1488 va_list args; \
1489 va_start(args, methodID); \
1490 JavaValue jvalue(Tag); \
1491 JNI_ArgumentPusherVaArg ap(methodID, args); \
1492 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_0); \
1493 va_end(args); \
1494 ret = jvalue.get_##ResultType(); \
1495 return ret;\
1496 JNI_END
1497
1498 // the runtime type of subword integral basic types is integer
1499 DEFINE_CALLNONVIRTUALMETHOD(jboolean, Boolean, T_BOOLEAN
1500 , HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1501 HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHOD_RETURN(_ret_ref))
1502 DEFINE_CALLNONVIRTUALMETHOD(jbyte, Byte, T_BYTE
1503 , HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1504 HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHOD_RETURN(_ret_ref))
1505 DEFINE_CALLNONVIRTUALMETHOD(jchar, Char, T_CHAR
1506 , HOTSPOT_JNI_CALLNONVIRTUALCHARMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1507 HOTSPOT_JNI_CALLNONVIRTUALCHARMETHOD_RETURN(_ret_ref))
1508 DEFINE_CALLNONVIRTUALMETHOD(jshort, Short, T_SHORT
1509 , HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1510 HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHOD_RETURN(_ret_ref))
1511
1512 DEFINE_CALLNONVIRTUALMETHOD(jobject, Object, T_OBJECT
1513 , HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1514 HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHOD_RETURN(_ret_ref))
1515 DEFINE_CALLNONVIRTUALMETHOD(jint, Int, T_INT
1516 , HOTSPOT_JNI_CALLNONVIRTUALINTMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1517 HOTSPOT_JNI_CALLNONVIRTUALINTMETHOD_RETURN(_ret_ref))
1518 DEFINE_CALLNONVIRTUALMETHOD(jlong, Long, T_LONG
1519 , HOTSPOT_JNI_CALLNONVIRTUALLONGMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1520 // Float and double probes don't return value because dtrace doesn't currently support it
1521 HOTSPOT_JNI_CALLNONVIRTUALLONGMETHOD_RETURN(_ret_ref))
1522 DEFINE_CALLNONVIRTUALMETHOD(jfloat, Float, T_FLOAT
1523 , HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1524 HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHOD_RETURN())
1525 DEFINE_CALLNONVIRTUALMETHOD(jdouble, Double, T_DOUBLE
1526 , HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1527 HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHOD_RETURN())
1528
1529 #define DEFINE_CALLNONVIRTUALMETHODV(ResultType, Result, Tag \
1530 , EntryProbe, ReturnProbe) \
1531 \
1532 DT_RETURN_MARK_DECL_FOR(Result, CallNonvirtual##Result##MethodV, ResultType \
1533 , ReturnProbe);\
1534 \
1535 JNI_ENTRY(ResultType, \
1536 jni_CallNonvirtual##Result##MethodV(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, va_list args)) \
1537 JNIWrapper("CallNonvitual" XSTR(Result) "MethodV"); \
1538 \
1539 EntryProbe;\
1540 ResultType ret;\
1541 DT_RETURN_MARK_FOR(Result, CallNonvirtual##Result##MethodV, ResultType, \
1542 (const ResultType&)ret);\
1543 \
1544 JavaValue jvalue(Tag); \
1545 JNI_ArgumentPusherVaArg ap(methodID, args); \
1546 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_0); \
1547 ret = jvalue.get_##ResultType(); \
1548 return ret;\
1549 JNI_END
1550
1551 // the runtime type of subword integral basic types is integer
1552 DEFINE_CALLNONVIRTUALMETHODV(jboolean, Boolean, T_BOOLEAN
1553 , HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1554 HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHODV_RETURN(_ret_ref))
1555 DEFINE_CALLNONVIRTUALMETHODV(jbyte, Byte, T_BYTE
1556 , HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1557 HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHODV_RETURN(_ret_ref))
1558 DEFINE_CALLNONVIRTUALMETHODV(jchar, Char, T_CHAR
1559 , HOTSPOT_JNI_CALLNONVIRTUALCHARMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1560 HOTSPOT_JNI_CALLNONVIRTUALCHARMETHODV_RETURN(_ret_ref))
1561 DEFINE_CALLNONVIRTUALMETHODV(jshort, Short, T_SHORT
1562 , HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1563 HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHODV_RETURN(_ret_ref))
1564
1565 DEFINE_CALLNONVIRTUALMETHODV(jobject, Object, T_OBJECT
1566 , HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1567 HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHODV_RETURN(_ret_ref))
1568 DEFINE_CALLNONVIRTUALMETHODV(jint, Int, T_INT
1569 , HOTSPOT_JNI_CALLNONVIRTUALINTMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1570 HOTSPOT_JNI_CALLNONVIRTUALINTMETHODV_RETURN(_ret_ref))
1571 DEFINE_CALLNONVIRTUALMETHODV(jlong, Long, T_LONG
1572 , HOTSPOT_JNI_CALLNONVIRTUALLONGMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1573 // Float and double probes don't return value because dtrace doesn't currently support it
1574 HOTSPOT_JNI_CALLNONVIRTUALLONGMETHODV_RETURN(_ret_ref))
1575 DEFINE_CALLNONVIRTUALMETHODV(jfloat, Float, T_FLOAT
1576 , HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1577 HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHODV_RETURN())
1578 DEFINE_CALLNONVIRTUALMETHODV(jdouble, Double, T_DOUBLE
1579 , HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1580 HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHODV_RETURN())
1581
1582 #define DEFINE_CALLNONVIRTUALMETHODA(ResultType, Result, Tag \
1583 , EntryProbe, ReturnProbe) \
1584 \
1585 DT_RETURN_MARK_DECL_FOR(Result, CallNonvirtual##Result##MethodA, ResultType \
1586 , ReturnProbe);\
1587 \
1588 JNI_ENTRY(ResultType, \
1589 jni_CallNonvirtual##Result##MethodA(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, const jvalue *args)) \
1590 JNIWrapper("CallNonvitual" XSTR(Result) "MethodA"); \
1591 \
1592 EntryProbe;\
1593 ResultType ret;\
1594 DT_RETURN_MARK_FOR(Result, CallNonvirtual##Result##MethodA, ResultType, \
1595 (const ResultType&)ret);\
1596 \
1597 JavaValue jvalue(Tag); \
1598 JNI_ArgumentPusherArray ap(methodID, args); \
1599 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_0); \
1600 ret = jvalue.get_##ResultType(); \
1601 return ret;\
1602 JNI_END
1603
1604 // the runtime type of subword integral basic types is integer
1605 DEFINE_CALLNONVIRTUALMETHODA(jboolean, Boolean, T_BOOLEAN
1606 , HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1607 HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHODA_RETURN(_ret_ref))
1608 DEFINE_CALLNONVIRTUALMETHODA(jbyte, Byte, T_BYTE
1609 , HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1610 HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHODA_RETURN(_ret_ref))
1611 DEFINE_CALLNONVIRTUALMETHODA(jchar, Char, T_CHAR
1612 , HOTSPOT_JNI_CALLNONVIRTUALCHARMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1613 HOTSPOT_JNI_CALLNONVIRTUALCHARMETHODA_RETURN(_ret_ref))
1614 DEFINE_CALLNONVIRTUALMETHODA(jshort, Short, T_SHORT
1615 , HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1616 HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHODA_RETURN(_ret_ref))
1617
1618 DEFINE_CALLNONVIRTUALMETHODA(jobject, Object, T_OBJECT
1619 , HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1620 HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHODA_RETURN(_ret_ref))
1621 DEFINE_CALLNONVIRTUALMETHODA(jint, Int, T_INT
1622 , HOTSPOT_JNI_CALLNONVIRTUALINTMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1623 HOTSPOT_JNI_CALLNONVIRTUALINTMETHODA_RETURN(_ret_ref))
1624 DEFINE_CALLNONVIRTUALMETHODA(jlong, Long, T_LONG
1625 , HOTSPOT_JNI_CALLNONVIRTUALLONGMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1626 // Float and double probes don't return value because dtrace doesn't currently support it
1627 HOTSPOT_JNI_CALLNONVIRTUALLONGMETHODA_RETURN(_ret_ref))
1628 DEFINE_CALLNONVIRTUALMETHODA(jfloat, Float, T_FLOAT
1629 , HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1630 HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHODA_RETURN())
1631 DEFINE_CALLNONVIRTUALMETHODA(jdouble, Double, T_DOUBLE
1632 , HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1633 HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHODA_RETURN())
1634
1635 DT_VOID_RETURN_MARK_DECL(CallNonvirtualVoidMethod
1636 , HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHOD_RETURN());
1637 DT_VOID_RETURN_MARK_DECL(CallNonvirtualVoidMethodV
1638 , HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHODV_RETURN());
1639 DT_VOID_RETURN_MARK_DECL(CallNonvirtualVoidMethodA
1640 , HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHODA_RETURN());
1641
1642 JNI_ENTRY(void, jni_CallNonvirtualVoidMethod(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, ...))
1643 JNIWrapper("CallNonvirtualVoidMethod");
1644
1645 HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHOD_ENTRY(env, obj, cls, (uintptr_t) methodID);
1646 DT_VOID_RETURN_MARK(CallNonvirtualVoidMethod);
1647
1648 va_list args;
1649 va_start(args, methodID);
1650 JavaValue jvalue(T_VOID);
1651 JNI_ArgumentPusherVaArg ap(methodID, args);
1652 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK);
1653 va_end(args);
1654 JNI_END
1655
1656
1657 JNI_ENTRY(void, jni_CallNonvirtualVoidMethodV(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, va_list args))
1658 JNIWrapper("CallNonvirtualVoidMethodV");
1659
1660 HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHODV_ENTRY(
1661 env, obj, cls, (uintptr_t) methodID);
1662 DT_VOID_RETURN_MARK(CallNonvirtualVoidMethodV);
1663
1664 JavaValue jvalue(T_VOID);
1665 JNI_ArgumentPusherVaArg ap(methodID, args);
1666 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK);
1667 JNI_END
1668
1669
1670 JNI_ENTRY(void, jni_CallNonvirtualVoidMethodA(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, const jvalue *args))
1671 JNIWrapper("CallNonvirtualVoidMethodA");
1672 HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHODA_ENTRY(
1673 env, obj, cls, (uintptr_t) methodID);
1674 DT_VOID_RETURN_MARK(CallNonvirtualVoidMethodA);
1675 JavaValue jvalue(T_VOID);
1676 JNI_ArgumentPusherArray ap(methodID, args);
1677 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK);
1678 JNI_END
1679
1680
1681
1682 #define DEFINE_CALLSTATICMETHOD(ResultType, Result, Tag \
1683 , EntryProbe, ResultProbe) \
1684 \
1685 DT_RETURN_MARK_DECL_FOR(Result, CallStatic##Result##Method, ResultType \
1686 , ResultProbe); \
1687 \
1688 JNI_ENTRY(ResultType, \
1689 jni_CallStatic##Result##Method(JNIEnv *env, jclass cls, jmethodID methodID, ...)) \
1690 JNIWrapper("CallStatic" XSTR(Result) "Method"); \
1691 \
1692 EntryProbe; \
1693 ResultType ret = 0;\
1694 DT_RETURN_MARK_FOR(Result, CallStatic##Result##Method, ResultType, \
1695 (const ResultType&)ret);\
1696 \
1697 va_list args; \
1698 va_start(args, methodID); \
1699 JavaValue jvalue(Tag); \
1700 JNI_ArgumentPusherVaArg ap(methodID, args); \
1701 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK_0); \
1702 va_end(args); \
1703 ret = jvalue.get_##ResultType(); \
1704 return ret;\
1705 JNI_END
1706
1707 // the runtime type of subword integral basic types is integer
1708 DEFINE_CALLSTATICMETHOD(jboolean, Boolean, T_BOOLEAN
1709 , HOTSPOT_JNI_CALLSTATICBOOLEANMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1710 HOTSPOT_JNI_CALLSTATICBOOLEANMETHOD_RETURN(_ret_ref));
1711 DEFINE_CALLSTATICMETHOD(jbyte, Byte, T_BYTE
1712 , HOTSPOT_JNI_CALLSTATICBYTEMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1713 HOTSPOT_JNI_CALLSTATICBYTEMETHOD_RETURN(_ret_ref));
1714 DEFINE_CALLSTATICMETHOD(jchar, Char, T_CHAR
1715 , HOTSPOT_JNI_CALLSTATICCHARMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1716 HOTSPOT_JNI_CALLSTATICCHARMETHOD_RETURN(_ret_ref));
1717 DEFINE_CALLSTATICMETHOD(jshort, Short, T_SHORT
1718 , HOTSPOT_JNI_CALLSTATICSHORTMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1719 HOTSPOT_JNI_CALLSTATICSHORTMETHOD_RETURN(_ret_ref));
1720
1721 DEFINE_CALLSTATICMETHOD(jobject, Object, T_OBJECT
1722 , HOTSPOT_JNI_CALLSTATICOBJECTMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1723 HOTSPOT_JNI_CALLSTATICOBJECTMETHOD_RETURN(_ret_ref));
1724 DEFINE_CALLSTATICMETHOD(jint, Int, T_INT
1725 , HOTSPOT_JNI_CALLSTATICINTMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1726 HOTSPOT_JNI_CALLSTATICINTMETHOD_RETURN(_ret_ref));
1727 DEFINE_CALLSTATICMETHOD(jlong, Long, T_LONG
1728 , HOTSPOT_JNI_CALLSTATICLONGMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1729 HOTSPOT_JNI_CALLSTATICLONGMETHOD_RETURN(_ret_ref));
1730 // Float and double probes don't return value because dtrace doesn't currently support it
1731 DEFINE_CALLSTATICMETHOD(jfloat, Float, T_FLOAT
1732 , HOTSPOT_JNI_CALLSTATICFLOATMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1733 HOTSPOT_JNI_CALLSTATICFLOATMETHOD_RETURN());
1734 DEFINE_CALLSTATICMETHOD(jdouble, Double, T_DOUBLE
1735 , HOTSPOT_JNI_CALLSTATICDOUBLEMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1736 HOTSPOT_JNI_CALLSTATICDOUBLEMETHOD_RETURN());
1737
1738 #define DEFINE_CALLSTATICMETHODV(ResultType, Result, Tag \
1739 , EntryProbe, ResultProbe) \
1740 \
1741 DT_RETURN_MARK_DECL_FOR(Result, CallStatic##Result##MethodV, ResultType \
1742 , ResultProbe); \
1743 \
1744 JNI_ENTRY(ResultType, \
1745 jni_CallStatic##Result##MethodV(JNIEnv *env, jclass cls, jmethodID methodID, va_list args)) \
1746 JNIWrapper("CallStatic" XSTR(Result) "MethodV"); \
1747 \
1748 EntryProbe; \
1749 ResultType ret = 0;\
1750 DT_RETURN_MARK_FOR(Result, CallStatic##Result##MethodV, ResultType, \
1751 (const ResultType&)ret);\
1752 \
1753 JavaValue jvalue(Tag); \
1754 JNI_ArgumentPusherVaArg ap(methodID, args); \
1755 /* Make sure class is initialized before trying to invoke its method */ \
1756 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); \
1757 k->initialize(CHECK_0); \
1758 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK_0); \
1759 va_end(args); \
1760 ret = jvalue.get_##ResultType(); \
1761 return ret;\
1762 JNI_END
1763
1764 // the runtime type of subword integral basic types is integer
1765 DEFINE_CALLSTATICMETHODV(jboolean, Boolean, T_BOOLEAN
1766 , HOTSPOT_JNI_CALLSTATICBOOLEANMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1767 HOTSPOT_JNI_CALLSTATICBOOLEANMETHODV_RETURN(_ret_ref));
1768 DEFINE_CALLSTATICMETHODV(jbyte, Byte, T_BYTE
1769 , HOTSPOT_JNI_CALLSTATICBYTEMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1770 HOTSPOT_JNI_CALLSTATICBYTEMETHODV_RETURN(_ret_ref));
1771 DEFINE_CALLSTATICMETHODV(jchar, Char, T_CHAR
1772 , HOTSPOT_JNI_CALLSTATICCHARMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1773 HOTSPOT_JNI_CALLSTATICCHARMETHODV_RETURN(_ret_ref));
1774 DEFINE_CALLSTATICMETHODV(jshort, Short, T_SHORT
1775 , HOTSPOT_JNI_CALLSTATICSHORTMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1776 HOTSPOT_JNI_CALLSTATICSHORTMETHODV_RETURN(_ret_ref));
1777
1778 DEFINE_CALLSTATICMETHODV(jobject, Object, T_OBJECT
1779 , HOTSPOT_JNI_CALLSTATICOBJECTMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1780 HOTSPOT_JNI_CALLSTATICOBJECTMETHODV_RETURN(_ret_ref));
1781 DEFINE_CALLSTATICMETHODV(jint, Int, T_INT
1782 , HOTSPOT_JNI_CALLSTATICINTMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1783 HOTSPOT_JNI_CALLSTATICINTMETHODV_RETURN(_ret_ref));
1784 DEFINE_CALLSTATICMETHODV(jlong, Long, T_LONG
1785 , HOTSPOT_JNI_CALLSTATICLONGMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1786 HOTSPOT_JNI_CALLSTATICLONGMETHODV_RETURN(_ret_ref));
1787 // Float and double probes don't return value because dtrace doesn't currently support it
1788 DEFINE_CALLSTATICMETHODV(jfloat, Float, T_FLOAT
1789 , HOTSPOT_JNI_CALLSTATICFLOATMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1790 HOTSPOT_JNI_CALLSTATICFLOATMETHODV_RETURN());
1791 DEFINE_CALLSTATICMETHODV(jdouble, Double, T_DOUBLE
1792 , HOTSPOT_JNI_CALLSTATICDOUBLEMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1793 HOTSPOT_JNI_CALLSTATICDOUBLEMETHODV_RETURN());
1794
1795 #define DEFINE_CALLSTATICMETHODA(ResultType, Result, Tag \
1796 , EntryProbe, ResultProbe) \
1797 \
1798 DT_RETURN_MARK_DECL_FOR(Result, CallStatic##Result##MethodA, ResultType \
1799 , ResultProbe); \
1800 \
1801 JNI_ENTRY(ResultType, \
1802 jni_CallStatic##Result##MethodA(JNIEnv *env, jclass cls, jmethodID methodID, const jvalue *args)) \
1803 JNIWrapper("CallStatic" XSTR(Result) "MethodA"); \
1804 \
1805 EntryProbe; \
1806 ResultType ret = 0;\
1807 DT_RETURN_MARK_FOR(Result, CallStatic##Result##MethodA, ResultType, \
1808 (const ResultType&)ret);\
1809 \
1810 JavaValue jvalue(Tag); \
1811 JNI_ArgumentPusherArray ap(methodID, args); \
1812 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK_0); \
1813 ret = jvalue.get_##ResultType(); \
1814 return ret;\
1815 JNI_END
1816
1817 // the runtime type of subword integral basic types is integer
1818 DEFINE_CALLSTATICMETHODA(jboolean, Boolean, T_BOOLEAN
1819 , HOTSPOT_JNI_CALLSTATICBOOLEANMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1820 HOTSPOT_JNI_CALLSTATICBOOLEANMETHODA_RETURN(_ret_ref));
1821 DEFINE_CALLSTATICMETHODA(jbyte, Byte, T_BYTE
1822 , HOTSPOT_JNI_CALLSTATICBYTEMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1823 HOTSPOT_JNI_CALLSTATICBYTEMETHODA_RETURN(_ret_ref));
1824 DEFINE_CALLSTATICMETHODA(jchar, Char, T_CHAR
1825 , HOTSPOT_JNI_CALLSTATICCHARMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1826 HOTSPOT_JNI_CALLSTATICCHARMETHODA_RETURN(_ret_ref));
1827 DEFINE_CALLSTATICMETHODA(jshort, Short, T_SHORT
1828 , HOTSPOT_JNI_CALLSTATICSHORTMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1829 HOTSPOT_JNI_CALLSTATICSHORTMETHODA_RETURN(_ret_ref));
1830
1831 DEFINE_CALLSTATICMETHODA(jobject, Object, T_OBJECT
1832 , HOTSPOT_JNI_CALLSTATICOBJECTMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1833 HOTSPOT_JNI_CALLSTATICOBJECTMETHODA_RETURN(_ret_ref));
1834 DEFINE_CALLSTATICMETHODA(jint, Int, T_INT
1835 , HOTSPOT_JNI_CALLSTATICINTMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1836 HOTSPOT_JNI_CALLSTATICINTMETHODA_RETURN(_ret_ref));
1837 DEFINE_CALLSTATICMETHODA(jlong, Long, T_LONG
1838 , HOTSPOT_JNI_CALLSTATICLONGMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1839 HOTSPOT_JNI_CALLSTATICLONGMETHODA_RETURN(_ret_ref));
1840 // Float and double probes don't return value because dtrace doesn't currently support it
1841 DEFINE_CALLSTATICMETHODA(jfloat, Float, T_FLOAT
1842 , HOTSPOT_JNI_CALLSTATICFLOATMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1843 HOTSPOT_JNI_CALLSTATICFLOATMETHODA_RETURN());
1844 DEFINE_CALLSTATICMETHODA(jdouble, Double, T_DOUBLE
1845 , HOTSPOT_JNI_CALLSTATICDOUBLEMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1846 HOTSPOT_JNI_CALLSTATICDOUBLEMETHODA_RETURN());
1847
1848 DT_VOID_RETURN_MARK_DECL(CallStaticVoidMethod
1849 , HOTSPOT_JNI_CALLSTATICVOIDMETHOD_RETURN());
1850 DT_VOID_RETURN_MARK_DECL(CallStaticVoidMethodV
1851 , HOTSPOT_JNI_CALLSTATICVOIDMETHODV_RETURN());
1852 DT_VOID_RETURN_MARK_DECL(CallStaticVoidMethodA
1853 , HOTSPOT_JNI_CALLSTATICVOIDMETHODA_RETURN());
1854
1855 JNI_ENTRY(void, jni_CallStaticVoidMethod(JNIEnv *env, jclass cls, jmethodID methodID, ...))
1856 JNIWrapper("CallStaticVoidMethod");
1857 HOTSPOT_JNI_CALLSTATICVOIDMETHOD_ENTRY(env, cls, (uintptr_t) methodID);
1858 DT_VOID_RETURN_MARK(CallStaticVoidMethod);
1859
1860 va_list args;
1861 va_start(args, methodID);
1862 JavaValue jvalue(T_VOID);
1863 JNI_ArgumentPusherVaArg ap(methodID, args);
1864 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK);
1865 va_end(args);
1866 JNI_END
1867
1868
1869 JNI_ENTRY(void, jni_CallStaticVoidMethodV(JNIEnv *env, jclass cls, jmethodID methodID, va_list args))
1870 JNIWrapper("CallStaticVoidMethodV");
1871 HOTSPOT_JNI_CALLSTATICVOIDMETHODV_ENTRY(env, cls, (uintptr_t) methodID);
1872 DT_VOID_RETURN_MARK(CallStaticVoidMethodV);
1873
1874 JavaValue jvalue(T_VOID);
1875 JNI_ArgumentPusherVaArg ap(methodID, args);
1876 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK);
1877 JNI_END
1878
1879
1880 JNI_ENTRY(void, jni_CallStaticVoidMethodA(JNIEnv *env, jclass cls, jmethodID methodID, const jvalue *args))
1881 JNIWrapper("CallStaticVoidMethodA");
1882 HOTSPOT_JNI_CALLSTATICVOIDMETHODA_ENTRY(env, cls, (uintptr_t) methodID);
1883 DT_VOID_RETURN_MARK(CallStaticVoidMethodA);
1884
1885 JavaValue jvalue(T_VOID);
1886 JNI_ArgumentPusherArray ap(methodID, args);
1887 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK);
1888 JNI_END
1889
1890
1891 //
1892 // Accessing Fields
1893 //
1894
1895
1896 DT_RETURN_MARK_DECL(GetFieldID, jfieldID
1897 , HOTSPOT_JNI_GETFIELDID_RETURN((uintptr_t)_ret_ref));
1898
1899 JNI_ENTRY(jfieldID, jni_GetFieldID(JNIEnv *env, jclass clazz,
1900 const char *name, const char *sig))
1901 JNIWrapper("GetFieldID");
1902 HOTSPOT_JNI_GETFIELDID_ENTRY(env, clazz, (char *) name, (char *) sig);
1903 jfieldID ret = 0;
1904 DT_RETURN_MARK(GetFieldID, jfieldID, (const jfieldID&)ret);
1905
1906 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz));
1907
1908 // The class should have been loaded (we have an instance of the class
1909 // passed in) so the field and signature should already be in the symbol
1910 // table. If they're not there, the field doesn't exist.
1911 TempNewSymbol fieldname = SymbolTable::probe(name, (int)strlen(name));
1912 TempNewSymbol signame = SymbolTable::probe(sig, (int)strlen(sig));
1913 if (fieldname == NULL || signame == NULL) {
1914 ResourceMark rm;
1915 THROW_MSG_0(vmSymbols::java_lang_NoSuchFieldError(), err_msg("%s.%s %s", k->external_name(), name, sig));
1916 }
1917
1918 // Make sure class is initialized before handing id's out to fields
1919 k->initialize(CHECK_NULL);
1920
1921 fieldDescriptor fd;
1922 if (!k->is_instance_klass() ||
1923 !InstanceKlass::cast(k)->find_field(fieldname, signame, false, &fd)) {
1924 ResourceMark rm;
1925 THROW_MSG_0(vmSymbols::java_lang_NoSuchFieldError(), err_msg("%s.%s %s", k->external_name(), name, sig));
1926 }
1927
1928 // A jfieldID for a non-static field is simply the offset of the field within the instanceOop
1929 // It may also have hash bits for k, if VerifyJNIFields is turned on.
1930 ret = jfieldIDWorkaround::to_instance_jfieldID(k, fd.offset());
1931 return ret;
1932 JNI_END
1933
1934
1935 JNI_ENTRY(jobject, jni_GetObjectField(JNIEnv *env, jobject obj, jfieldID fieldID))
1936 JNIWrapper("GetObjectField");
1937 HOTSPOT_JNI_GETOBJECTFIELD_ENTRY(env, obj, (uintptr_t) fieldID);
1938 oop o = JNIHandles::resolve_non_null(obj);
1939 Klass* k = o->klass();
1940 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID);
1941 // Keep JVMTI addition small and only check enabled flag here.
1942 // jni_GetField_probe() assumes that is okay to create handles.
1943 if (JvmtiExport::should_post_field_access()) {
1944 o = JvmtiExport::jni_GetField_probe(thread, obj, o, k, fieldID, false);
1945 }
1946 oop loaded_obj = HeapAccess<ON_UNKNOWN_OOP_REF>::oop_load_at(o, offset);
1947 jobject ret = JNIHandles::make_local(env, loaded_obj);
1948 HOTSPOT_JNI_GETOBJECTFIELD_RETURN(ret);
1949 return ret;
1950 JNI_END
1951
1952
1953
1954 #define DEFINE_GETFIELD(Return,Fieldname,Result \
1955 , EntryProbe, ReturnProbe) \
1956 \
1957 DT_RETURN_MARK_DECL_FOR(Result, Get##Result##Field, Return \
1958 , ReturnProbe); \
1959 \
1960 JNI_ENTRY_NO_PRESERVE(Return, jni_Get##Result##Field(JNIEnv *env, jobject obj, jfieldID fieldID)) \
1961 JNIWrapper("Get" XSTR(Result) "Field"); \
1962 \
1963 EntryProbe; \
1964 Return ret = 0;\
1965 DT_RETURN_MARK_FOR(Result, Get##Result##Field, Return, (const Return&)ret);\
1966 \
1967 oop o = JNIHandles::resolve_non_null(obj); \
1968 Klass* k = o->klass(); \
1969 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID); \
1970 /* Keep JVMTI addition small and only check enabled flag here. */ \
1971 /* jni_GetField_probe_nh() assumes that is not okay to create handles */ \
1972 /* and creates a ResetNoHandleMark. */ \
1973 if (JvmtiExport::should_post_field_access()) { \
1974 o = JvmtiExport::jni_GetField_probe_nh(thread, obj, o, k, fieldID, false); \
1975 } \
1976 ret = o->Fieldname##_field(offset); \
1977 return ret; \
1978 JNI_END
1979
1980 DEFINE_GETFIELD(jboolean, bool, Boolean
1981 , HOTSPOT_JNI_GETBOOLEANFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
1982 HOTSPOT_JNI_GETBOOLEANFIELD_RETURN(_ret_ref))
1983 DEFINE_GETFIELD(jbyte, byte, Byte
1984 , HOTSPOT_JNI_GETBYTEFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
1985 HOTSPOT_JNI_GETBYTEFIELD_RETURN(_ret_ref))
1986 DEFINE_GETFIELD(jchar, char, Char
1987 , HOTSPOT_JNI_GETCHARFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
1988 HOTSPOT_JNI_GETCHARFIELD_RETURN(_ret_ref))
1989 DEFINE_GETFIELD(jshort, short, Short
1990 , HOTSPOT_JNI_GETSHORTFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
1991 HOTSPOT_JNI_GETSHORTFIELD_RETURN(_ret_ref))
1992 DEFINE_GETFIELD(jint, int, Int
1993 , HOTSPOT_JNI_GETINTFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
1994 HOTSPOT_JNI_GETINTFIELD_RETURN(_ret_ref))
1995 DEFINE_GETFIELD(jlong, long, Long
1996 , HOTSPOT_JNI_GETLONGFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
1997 HOTSPOT_JNI_GETLONGFIELD_RETURN(_ret_ref))
1998 // Float and double probes don't return value because dtrace doesn't currently support it
1999 DEFINE_GETFIELD(jfloat, float, Float
2000 , HOTSPOT_JNI_GETFLOATFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2001 HOTSPOT_JNI_GETFLOATFIELD_RETURN())
2002 DEFINE_GETFIELD(jdouble, double, Double
2003 , HOTSPOT_JNI_GETDOUBLEFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2004 HOTSPOT_JNI_GETDOUBLEFIELD_RETURN())
2005
2006 address jni_GetBooleanField_addr() {
2007 return (address)jni_GetBooleanField;
2008 }
2009 address jni_GetByteField_addr() {
2010 return (address)jni_GetByteField;
2011 }
2012 address jni_GetCharField_addr() {
2013 return (address)jni_GetCharField;
2014 }
2015 address jni_GetShortField_addr() {
2016 return (address)jni_GetShortField;
2017 }
2018 address jni_GetIntField_addr() {
2019 return (address)jni_GetIntField;
2020 }
2021 address jni_GetLongField_addr() {
2022 return (address)jni_GetLongField;
2023 }
2024 address jni_GetFloatField_addr() {
2025 return (address)jni_GetFloatField;
2026 }
2027 address jni_GetDoubleField_addr() {
2028 return (address)jni_GetDoubleField;
2029 }
2030
2031 JNI_ENTRY_NO_PRESERVE(void, jni_SetObjectField(JNIEnv *env, jobject obj, jfieldID fieldID, jobject value))
2032 JNIWrapper("SetObjectField");
2033 HOTSPOT_JNI_SETOBJECTFIELD_ENTRY(env, obj, (uintptr_t) fieldID, value);
2034 oop o = JNIHandles::resolve_non_null(obj);
2035 Klass* k = o->klass();
2036 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID);
2037 // Keep JVMTI addition small and only check enabled flag here.
2038 // jni_SetField_probe_nh() assumes that is not okay to create handles
2039 // and creates a ResetNoHandleMark.
2040 if (JvmtiExport::should_post_field_modification()) {
2041 jvalue field_value;
2042 field_value.l = value;
2043 o = JvmtiExport::jni_SetField_probe_nh(thread, obj, o, k, fieldID, false, JVM_SIGNATURE_CLASS, (jvalue *)&field_value);
2044 }
2045 HeapAccess<ON_UNKNOWN_OOP_REF>::oop_store_at(o, offset, JNIHandles::resolve(value));
2046 HOTSPOT_JNI_SETOBJECTFIELD_RETURN();
2047 JNI_END
2048
2049
2050 #define DEFINE_SETFIELD(Argument,Fieldname,Result,SigType,unionType \
2051 , EntryProbe, ReturnProbe) \
2052 \
2053 JNI_ENTRY_NO_PRESERVE(void, jni_Set##Result##Field(JNIEnv *env, jobject obj, jfieldID fieldID, Argument value)) \
2054 JNIWrapper("Set" XSTR(Result) "Field"); \
2055 \
2056 EntryProbe; \
2057 \
2058 oop o = JNIHandles::resolve_non_null(obj); \
2059 Klass* k = o->klass(); \
2060 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID); \
2061 /* Keep JVMTI addition small and only check enabled flag here. */ \
2062 /* jni_SetField_probe_nh() assumes that is not okay to create handles */ \
2063 /* and creates a ResetNoHandleMark. */ \
2064 if (JvmtiExport::should_post_field_modification()) { \
2065 jvalue field_value; \
2066 field_value.unionType = value; \
2067 o = JvmtiExport::jni_SetField_probe_nh(thread, obj, o, k, fieldID, false, SigType, (jvalue *)&field_value); \
2068 } \
2069 if (SigType == JVM_SIGNATURE_BOOLEAN) { value = ((jboolean)value) & 1; } \
2070 o->Fieldname##_field_put(offset, value); \
2071 ReturnProbe; \
2072 JNI_END
2073
2074 DEFINE_SETFIELD(jboolean, bool, Boolean, JVM_SIGNATURE_BOOLEAN, z
2075 , HOTSPOT_JNI_SETBOOLEANFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value),
2076 HOTSPOT_JNI_SETBOOLEANFIELD_RETURN())
2077 DEFINE_SETFIELD(jbyte, byte, Byte, JVM_SIGNATURE_BYTE, b
2078 , HOTSPOT_JNI_SETBYTEFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value),
2079 HOTSPOT_JNI_SETBYTEFIELD_RETURN())
2080 DEFINE_SETFIELD(jchar, char, Char, JVM_SIGNATURE_CHAR, c
2081 , HOTSPOT_JNI_SETCHARFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value),
2082 HOTSPOT_JNI_SETCHARFIELD_RETURN())
2083 DEFINE_SETFIELD(jshort, short, Short, JVM_SIGNATURE_SHORT, s
2084 , HOTSPOT_JNI_SETSHORTFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value),
2085 HOTSPOT_JNI_SETSHORTFIELD_RETURN())
2086 DEFINE_SETFIELD(jint, int, Int, JVM_SIGNATURE_INT, i
2087 , HOTSPOT_JNI_SETINTFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value),
2088 HOTSPOT_JNI_SETINTFIELD_RETURN())
2089 DEFINE_SETFIELD(jlong, long, Long, JVM_SIGNATURE_LONG, j
2090 , HOTSPOT_JNI_SETLONGFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value),
2091 HOTSPOT_JNI_SETLONGFIELD_RETURN())
2092 // Float and double probes don't return value because dtrace doesn't currently support it
2093 DEFINE_SETFIELD(jfloat, float, Float, JVM_SIGNATURE_FLOAT, f
2094 , HOTSPOT_JNI_SETFLOATFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2095 HOTSPOT_JNI_SETFLOATFIELD_RETURN())
2096 DEFINE_SETFIELD(jdouble, double, Double, JVM_SIGNATURE_DOUBLE, d
2097 , HOTSPOT_JNI_SETDOUBLEFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2098 HOTSPOT_JNI_SETDOUBLEFIELD_RETURN())
2099
2100 DT_RETURN_MARK_DECL(ToReflectedField, jobject
2101 , HOTSPOT_JNI_TOREFLECTEDFIELD_RETURN(_ret_ref));
2102
2103 JNI_ENTRY(jobject, jni_ToReflectedField(JNIEnv *env, jclass cls, jfieldID fieldID, jboolean isStatic))
2104 JNIWrapper("ToReflectedField");
2105 HOTSPOT_JNI_TOREFLECTEDFIELD_ENTRY(env, cls, (uintptr_t) fieldID, isStatic);
2106 jobject ret = NULL;
2107 DT_RETURN_MARK(ToReflectedField, jobject, (const jobject&)ret);
2108
2109 fieldDescriptor fd;
2110 bool found = false;
2111 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2112
2113 assert(jfieldIDWorkaround::is_static_jfieldID(fieldID) == (isStatic != 0), "invalid fieldID");
2114
2115 if (isStatic) {
2116 // Static field. The fieldID a JNIid specifying the field holder and the offset within the Klass*.
2117 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID);
2118 assert(id->is_static_field_id(), "invalid static field id");
2119 found = id->find_local_field(&fd);
2120 } else {
2121 // Non-static field. The fieldID is really the offset of the field within the instanceOop.
2122 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID);
2123 found = InstanceKlass::cast(k)->find_field_from_offset(offset, false, &fd);
2124 }
2125 assert(found, "bad fieldID passed into jni_ToReflectedField");
2126 oop reflected = Reflection::new_field(&fd, CHECK_NULL);
2127 ret = JNIHandles::make_local(env, reflected);
2128 return ret;
2129 JNI_END
2130
2131
2132 //
2133 // Accessing Static Fields
2134 //
2135 DT_RETURN_MARK_DECL(GetStaticFieldID, jfieldID
2136 , HOTSPOT_JNI_GETSTATICFIELDID_RETURN((uintptr_t)_ret_ref));
2137
2138 JNI_ENTRY(jfieldID, jni_GetStaticFieldID(JNIEnv *env, jclass clazz,
2139 const char *name, const char *sig))
2140 JNIWrapper("GetStaticFieldID");
2141 HOTSPOT_JNI_GETSTATICFIELDID_ENTRY(env, clazz, (char *) name, (char *) sig);
2142 jfieldID ret = NULL;
2143 DT_RETURN_MARK(GetStaticFieldID, jfieldID, (const jfieldID&)ret);
2144
2145 // The class should have been loaded (we have an instance of the class
2146 // passed in) so the field and signature should already be in the symbol
2147 // table. If they're not there, the field doesn't exist.
2148 TempNewSymbol fieldname = SymbolTable::probe(name, (int)strlen(name));
2149 TempNewSymbol signame = SymbolTable::probe(sig, (int)strlen(sig));
2150 if (fieldname == NULL || signame == NULL) {
2151 THROW_MSG_0(vmSymbols::java_lang_NoSuchFieldError(), (char*) name);
2152 }
2153 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz));
2154 // Make sure class is initialized before handing id's out to static fields
2155 k->initialize(CHECK_NULL);
2156
2157 fieldDescriptor fd;
2158 if (!k->is_instance_klass() ||
2159 !InstanceKlass::cast(k)->find_field(fieldname, signame, true, &fd)) {
2160 THROW_MSG_0(vmSymbols::java_lang_NoSuchFieldError(), (char*) name);
2161 }
2162
2163 // A jfieldID for a static field is a JNIid specifying the field holder and the offset within the Klass*
2164 JNIid* id = fd.field_holder()->jni_id_for(fd.offset());
2165 debug_only(id->set_is_static_field_id();)
2166
2167 debug_only(id->verify(fd.field_holder()));
2168
2169 ret = jfieldIDWorkaround::to_static_jfieldID(id);
2170 return ret;
2171 JNI_END
2172
2173
2174 JNI_ENTRY(jobject, jni_GetStaticObjectField(JNIEnv *env, jclass clazz, jfieldID fieldID))
2175 JNIWrapper("GetStaticObjectField");
2176 HOTSPOT_JNI_GETSTATICOBJECTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID);
2177 #if INCLUDE_JNI_CHECK
2178 DEBUG_ONLY(Klass* param_k = jniCheck::validate_class(thread, clazz);)
2179 #endif // INCLUDE_JNI_CHECK
2180 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID);
2181 assert(id->is_static_field_id(), "invalid static field id");
2182 // Keep JVMTI addition small and only check enabled flag here.
2183 // jni_GetField_probe() assumes that is okay to create handles.
2184 if (JvmtiExport::should_post_field_access()) {
2185 JvmtiExport::jni_GetField_probe(thread, NULL, NULL, id->holder(), fieldID, true);
2186 }
2187 jobject ret = JNIHandles::make_local(id->holder()->java_mirror()->obj_field(id->offset()));
2188 HOTSPOT_JNI_GETSTATICOBJECTFIELD_RETURN(ret);
2189 return ret;
2190 JNI_END
2191
2192
2193 #define DEFINE_GETSTATICFIELD(Return,Fieldname,Result \
2194 , EntryProbe, ReturnProbe) \
2195 \
2196 DT_RETURN_MARK_DECL_FOR(Result, GetStatic##Result##Field, Return \
2197 , ReturnProbe); \
2198 \
2199 JNI_ENTRY(Return, jni_GetStatic##Result##Field(JNIEnv *env, jclass clazz, jfieldID fieldID)) \
2200 JNIWrapper("GetStatic" XSTR(Result) "Field"); \
2201 EntryProbe; \
2202 Return ret = 0;\
2203 DT_RETURN_MARK_FOR(Result, GetStatic##Result##Field, Return, \
2204 (const Return&)ret);\
2205 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID); \
2206 assert(id->is_static_field_id(), "invalid static field id"); \
2207 /* Keep JVMTI addition small and only check enabled flag here. */ \
2208 /* jni_GetField_probe() assumes that is okay to create handles. */ \
2209 if (JvmtiExport::should_post_field_access()) { \
2210 JvmtiExport::jni_GetField_probe(thread, NULL, NULL, id->holder(), fieldID, true); \
2211 } \
2212 ret = id->holder()->java_mirror()-> Fieldname##_field (id->offset()); \
2213 return ret;\
2214 JNI_END
2215
2216 DEFINE_GETSTATICFIELD(jboolean, bool, Boolean
2217 , HOTSPOT_JNI_GETSTATICBOOLEANFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICBOOLEANFIELD_RETURN(_ret_ref))
2218 DEFINE_GETSTATICFIELD(jbyte, byte, Byte
2219 , HOTSPOT_JNI_GETSTATICBYTEFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICBYTEFIELD_RETURN(_ret_ref) )
2220 DEFINE_GETSTATICFIELD(jchar, char, Char
2221 , HOTSPOT_JNI_GETSTATICCHARFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICCHARFIELD_RETURN(_ret_ref) )
2222 DEFINE_GETSTATICFIELD(jshort, short, Short
2223 , HOTSPOT_JNI_GETSTATICSHORTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICSHORTFIELD_RETURN(_ret_ref) )
2224 DEFINE_GETSTATICFIELD(jint, int, Int
2225 , HOTSPOT_JNI_GETSTATICINTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICINTFIELD_RETURN(_ret_ref) )
2226 DEFINE_GETSTATICFIELD(jlong, long, Long
2227 , HOTSPOT_JNI_GETSTATICLONGFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICLONGFIELD_RETURN(_ret_ref) )
2228 // Float and double probes don't return value because dtrace doesn't currently support it
2229 DEFINE_GETSTATICFIELD(jfloat, float, Float
2230 , HOTSPOT_JNI_GETSTATICFLOATFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICFLOATFIELD_RETURN() )
2231 DEFINE_GETSTATICFIELD(jdouble, double, Double
2232 , HOTSPOT_JNI_GETSTATICDOUBLEFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICDOUBLEFIELD_RETURN() )
2233
2234 JNI_ENTRY(void, jni_SetStaticObjectField(JNIEnv *env, jclass clazz, jfieldID fieldID, jobject value))
2235 JNIWrapper("SetStaticObjectField");
2236 HOTSPOT_JNI_SETSTATICOBJECTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value);
2237 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID);
2238 assert(id->is_static_field_id(), "invalid static field id");
2239 // Keep JVMTI addition small and only check enabled flag here.
2240 // jni_SetField_probe() assumes that is okay to create handles.
2241 if (JvmtiExport::should_post_field_modification()) {
2242 jvalue field_value;
2243 field_value.l = value;
2244 JvmtiExport::jni_SetField_probe(thread, NULL, NULL, id->holder(), fieldID, true, JVM_SIGNATURE_CLASS, (jvalue *)&field_value);
2245 }
2246 id->holder()->java_mirror()->obj_field_put(id->offset(), JNIHandles::resolve(value));
2247 HOTSPOT_JNI_SETSTATICOBJECTFIELD_RETURN();
2248 JNI_END
2249
2250
2251
2252 #define DEFINE_SETSTATICFIELD(Argument,Fieldname,Result,SigType,unionType \
2253 , EntryProbe, ReturnProbe) \
2254 \
2255 JNI_ENTRY(void, jni_SetStatic##Result##Field(JNIEnv *env, jclass clazz, jfieldID fieldID, Argument value)) \
2256 JNIWrapper("SetStatic" XSTR(Result) "Field"); \
2257 EntryProbe; \
2258 \
2259 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID); \
2260 assert(id->is_static_field_id(), "invalid static field id"); \
2261 /* Keep JVMTI addition small and only check enabled flag here. */ \
2262 /* jni_SetField_probe() assumes that is okay to create handles. */ \
2263 if (JvmtiExport::should_post_field_modification()) { \
2264 jvalue field_value; \
2265 field_value.unionType = value; \
2266 JvmtiExport::jni_SetField_probe(thread, NULL, NULL, id->holder(), fieldID, true, SigType, (jvalue *)&field_value); \
2267 } \
2268 if (SigType == JVM_SIGNATURE_BOOLEAN) { value = ((jboolean)value) & 1; } \
2269 id->holder()->java_mirror()-> Fieldname##_field_put (id->offset(), value); \
2270 ReturnProbe;\
2271 JNI_END
2272
2273 DEFINE_SETSTATICFIELD(jboolean, bool, Boolean, JVM_SIGNATURE_BOOLEAN, z
2274 , HOTSPOT_JNI_SETSTATICBOOLEANFIELD_ENTRY(env, clazz, (uintptr_t)fieldID, value),
2275 HOTSPOT_JNI_SETSTATICBOOLEANFIELD_RETURN())
2276 DEFINE_SETSTATICFIELD(jbyte, byte, Byte, JVM_SIGNATURE_BYTE, b
2277 , HOTSPOT_JNI_SETSTATICBYTEFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value),
2278 HOTSPOT_JNI_SETSTATICBYTEFIELD_RETURN())
2279 DEFINE_SETSTATICFIELD(jchar, char, Char, JVM_SIGNATURE_CHAR, c
2280 , HOTSPOT_JNI_SETSTATICCHARFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value),
2281 HOTSPOT_JNI_SETSTATICCHARFIELD_RETURN())
2282 DEFINE_SETSTATICFIELD(jshort, short, Short, JVM_SIGNATURE_SHORT, s
2283 , HOTSPOT_JNI_SETSTATICSHORTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value),
2284 HOTSPOT_JNI_SETSTATICSHORTFIELD_RETURN())
2285 DEFINE_SETSTATICFIELD(jint, int, Int, JVM_SIGNATURE_INT, i
2286 , HOTSPOT_JNI_SETSTATICINTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value),
2287 HOTSPOT_JNI_SETSTATICINTFIELD_RETURN())
2288 DEFINE_SETSTATICFIELD(jlong, long, Long, JVM_SIGNATURE_LONG, j
2289 , HOTSPOT_JNI_SETSTATICLONGFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value),
2290 HOTSPOT_JNI_SETSTATICLONGFIELD_RETURN())
2291 // Float and double probes don't return value because dtrace doesn't currently support it
2292 DEFINE_SETSTATICFIELD(jfloat, float, Float, JVM_SIGNATURE_FLOAT, f
2293 , HOTSPOT_JNI_SETSTATICFLOATFIELD_ENTRY(env, clazz, (uintptr_t) fieldID),
2294 HOTSPOT_JNI_SETSTATICFLOATFIELD_RETURN())
2295 DEFINE_SETSTATICFIELD(jdouble, double, Double, JVM_SIGNATURE_DOUBLE, d
2296 , HOTSPOT_JNI_SETSTATICDOUBLEFIELD_ENTRY(env, clazz, (uintptr_t) fieldID),
2297 HOTSPOT_JNI_SETSTATICDOUBLEFIELD_RETURN())
2298
2299 //
2300 // String Operations
2301 //
2302
2303 // Unicode Interface
2304
2305 DT_RETURN_MARK_DECL(NewString, jstring
2306 , HOTSPOT_JNI_NEWSTRING_RETURN(_ret_ref));
2307
2308 JNI_ENTRY(jstring, jni_NewString(JNIEnv *env, const jchar *unicodeChars, jsize len))
2309 JNIWrapper("NewString");
2310 HOTSPOT_JNI_NEWSTRING_ENTRY(env, (uint16_t *) unicodeChars, len);
2311 jstring ret = NULL;
2312 DT_RETURN_MARK(NewString, jstring, (const jstring&)ret);
2313 oop string=java_lang_String::create_oop_from_unicode((jchar*) unicodeChars, len, CHECK_NULL);
2314 ret = (jstring) JNIHandles::make_local(env, string);
2315 return ret;
2316 JNI_END
2317
2318
2319 JNI_ENTRY_NO_PRESERVE(jsize, jni_GetStringLength(JNIEnv *env, jstring string))
2320 JNIWrapper("GetStringLength");
2321 HOTSPOT_JNI_GETSTRINGLENGTH_ENTRY(env, string);
2322 jsize ret = 0;
2323 oop s = JNIHandles::resolve_non_null(string);
2324 ret = java_lang_String::length(s);
2325 HOTSPOT_JNI_GETSTRINGLENGTH_RETURN(ret);
2326 return ret;
2327 JNI_END
2328
2329
2330 JNI_ENTRY_NO_PRESERVE(const jchar*, jni_GetStringChars(
2331 JNIEnv *env, jstring string, jboolean *isCopy))
2332 JNIWrapper("GetStringChars");
2333 HOTSPOT_JNI_GETSTRINGCHARS_ENTRY(env, string, (uintptr_t *) isCopy);
2334 jchar* buf = NULL;
2335 oop s = JNIHandles::resolve_non_null(string);
2336 typeArrayOop s_value = java_lang_String::value(s);
2337 if (s_value != NULL) {
2338 int s_len = java_lang_String::length(s, s_value);
2339 bool is_latin1 = java_lang_String::is_latin1(s);
2340 buf = NEW_C_HEAP_ARRAY_RETURN_NULL(jchar, s_len + 1, mtInternal); // add one for zero termination
2341 /* JNI Specification states return NULL on OOM */
2342 if (buf != NULL) {
2343 if (s_len > 0) {
2344 if (!is_latin1) {
2345 ArrayAccess<>::arraycopy_to_native(s_value, (size_t) typeArrayOopDesc::element_offset<jchar>(0),
2346 buf, s_len);
2347 } else {
2348 for (int i = 0; i < s_len; i++) {
2349 buf[i] = ((jchar) s_value->byte_at(i)) & 0xff;
2350 }
2351 }
2352 }
2353 buf[s_len] = 0;
2354 //%note jni_5
2355 if (isCopy != NULL) {
2356 *isCopy = JNI_TRUE;
2357 }
2358 }
2359 }
2360 HOTSPOT_JNI_GETSTRINGCHARS_RETURN(buf);
2361 return buf;
2362 JNI_END
2363
2364
2365 JNI_ENTRY_NO_PRESERVE(void, jni_ReleaseStringChars(JNIEnv *env, jstring str, const jchar *chars))
2366 JNIWrapper("ReleaseStringChars");
2367 HOTSPOT_JNI_RELEASESTRINGCHARS_ENTRY(env, str, (uint16_t *) chars);
2368 //%note jni_6
2369 if (chars != NULL) {
2370 // Since String objects are supposed to be immutable, don't copy any
2371 // new data back. A bad user will have to go after the char array.
2372 FreeHeap((void*) chars);
2373 }
2374 HOTSPOT_JNI_RELEASESTRINGCHARS_RETURN();
2375 JNI_END
2376
2377
2378 // UTF Interface
2379
2380 DT_RETURN_MARK_DECL(NewStringUTF, jstring
2381 , HOTSPOT_JNI_NEWSTRINGUTF_RETURN(_ret_ref));
2382
2383 JNI_ENTRY(jstring, jni_NewStringUTF(JNIEnv *env, const char *bytes))
2384 JNIWrapper("NewStringUTF");
2385 HOTSPOT_JNI_NEWSTRINGUTF_ENTRY(env, (char *) bytes);
2386 jstring ret;
2387 DT_RETURN_MARK(NewStringUTF, jstring, (const jstring&)ret);
2388
2389 oop result = java_lang_String::create_oop_from_str((char*) bytes, CHECK_NULL);
2390 ret = (jstring) JNIHandles::make_local(env, result);
2391 return ret;
2392 JNI_END
2393
2394
2395 JNI_ENTRY(jsize, jni_GetStringUTFLength(JNIEnv *env, jstring string))
2396 JNIWrapper("GetStringUTFLength");
2397 HOTSPOT_JNI_GETSTRINGUTFLENGTH_ENTRY(env, string);
2398 oop java_string = JNIHandles::resolve_non_null(string);
2399 jsize ret = java_lang_String::utf8_length(java_string);
2400 HOTSPOT_JNI_GETSTRINGUTFLENGTH_RETURN(ret);
2401 return ret;
2402 JNI_END
2403
2404
2405 JNI_ENTRY(const char*, jni_GetStringUTFChars(JNIEnv *env, jstring string, jboolean *isCopy))
2406 JNIWrapper("GetStringUTFChars");
2407 HOTSPOT_JNI_GETSTRINGUTFCHARS_ENTRY(env, string, (uintptr_t *) isCopy);
2408 char* result = NULL;
2409 oop java_string = JNIHandles::resolve_non_null(string);
2410 typeArrayOop s_value = java_lang_String::value(java_string);
2411 if (s_value != NULL) {
2412 size_t length = java_lang_String::utf8_length(java_string, s_value);
2413 /* JNI Specification states return NULL on OOM */
2414 result = AllocateHeap(length + 1, mtInternal, 0, AllocFailStrategy::RETURN_NULL);
2415 if (result != NULL) {
2416 java_lang_String::as_utf8_string(java_string, s_value, result, (int) length + 1);
2417 if (isCopy != NULL) {
2418 *isCopy = JNI_TRUE;
2419 }
2420 }
2421 }
2422 HOTSPOT_JNI_GETSTRINGUTFCHARS_RETURN(result);
2423 return result;
2424 JNI_END
2425
2426
2427 JNI_LEAF(void, jni_ReleaseStringUTFChars(JNIEnv *env, jstring str, const char *chars))
2428 JNIWrapper("ReleaseStringUTFChars");
2429 HOTSPOT_JNI_RELEASESTRINGUTFCHARS_ENTRY(env, str, (char *) chars);
2430 if (chars != NULL) {
2431 FreeHeap((char*) chars);
2432 }
2433 HOTSPOT_JNI_RELEASESTRINGUTFCHARS_RETURN();
2434 JNI_END
2435
2436
2437 JNI_ENTRY_NO_PRESERVE(jsize, jni_GetArrayLength(JNIEnv *env, jarray array))
2438 JNIWrapper("GetArrayLength");
2439 HOTSPOT_JNI_GETARRAYLENGTH_ENTRY(env, array);
2440 arrayOop a = arrayOop(JNIHandles::resolve_non_null(array));
2441 assert(a->is_array(), "must be array");
2442 jsize ret = a->length();
2443 HOTSPOT_JNI_GETARRAYLENGTH_RETURN(ret);
2444 return ret;
2445 JNI_END
2446
2447
2448 //
2449 // Object Array Operations
2450 //
2451
2452 DT_RETURN_MARK_DECL(NewObjectArray, jobjectArray
2453 , HOTSPOT_JNI_NEWOBJECTARRAY_RETURN(_ret_ref));
2454
2455 JNI_ENTRY(jobjectArray, jni_NewObjectArray(JNIEnv *env, jsize length, jclass elementClass, jobject initialElement))
2456 JNIWrapper("NewObjectArray");
2457 HOTSPOT_JNI_NEWOBJECTARRAY_ENTRY(env, length, elementClass, initialElement);
2458 jobjectArray ret = NULL;
2459 DT_RETURN_MARK(NewObjectArray, jobjectArray, (const jobjectArray&)ret);
2460 Klass* ek = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(elementClass));
2461 Klass* ak = ek->array_klass(CHECK_NULL);
2462 ObjArrayKlass::cast(ak)->initialize(CHECK_NULL);
2463 objArrayOop result = ObjArrayKlass::cast(ak)->allocate(length, CHECK_NULL);
2464 oop initial_value = JNIHandles::resolve(initialElement);
2465 if (initial_value != NULL) { // array already initialized with NULL
2466 for (int index = 0; index < length; index++) {
2467 result->obj_at_put(index, initial_value);
2468 }
2469 }
2470 ret = (jobjectArray) JNIHandles::make_local(env, result);
2471 return ret;
2472 JNI_END
2473
2474 DT_RETURN_MARK_DECL(GetObjectArrayElement, jobject
2475 , HOTSPOT_JNI_GETOBJECTARRAYELEMENT_RETURN(_ret_ref));
2476
2477 JNI_ENTRY(jobject, jni_GetObjectArrayElement(JNIEnv *env, jobjectArray array, jsize index))
2478 JNIWrapper("GetObjectArrayElement");
2479 HOTSPOT_JNI_GETOBJECTARRAYELEMENT_ENTRY(env, array, index);
2480 jobject ret = NULL;
2481 DT_RETURN_MARK(GetObjectArrayElement, jobject, (const jobject&)ret);
2482 objArrayOop a = objArrayOop(JNIHandles::resolve_non_null(array));
2483 if (a->is_within_bounds(index)) {
2484 ret = JNIHandles::make_local(env, a->obj_at(index));
2485 return ret;
2486 } else {
2487 ResourceMark rm(THREAD);
2488 stringStream ss;
2489 ss.print("Index %d out of bounds for length %d", index, a->length());
2490 THROW_MSG_0(vmSymbols::java_lang_ArrayIndexOutOfBoundsException(), ss.as_string());
2491 }
2492 JNI_END
2493
2494 DT_VOID_RETURN_MARK_DECL(SetObjectArrayElement
2495 , HOTSPOT_JNI_SETOBJECTARRAYELEMENT_RETURN());
2496
2497 JNI_ENTRY(void, jni_SetObjectArrayElement(JNIEnv *env, jobjectArray array, jsize index, jobject value))
2498 JNIWrapper("SetObjectArrayElement");
2499 HOTSPOT_JNI_SETOBJECTARRAYELEMENT_ENTRY(env, array, index, value);
2500 DT_VOID_RETURN_MARK(SetObjectArrayElement);
2501
2502 objArrayOop a = objArrayOop(JNIHandles::resolve_non_null(array));
2503 oop v = JNIHandles::resolve(value);
2504 if (a->is_within_bounds(index)) {
2505 if (v == NULL || v->is_a(ObjArrayKlass::cast(a->klass())->element_klass())) {
2506 a->obj_at_put(index, v);
2507 } else {
2508 ResourceMark rm(THREAD);
2509 stringStream ss;
2510 Klass *bottom_kl = ObjArrayKlass::cast(a->klass())->bottom_klass();
2511 ss.print("type mismatch: can not store %s to %s[%d]",
2512 v->klass()->external_name(),
2513 bottom_kl->is_typeArray_klass() ? type2name_tab[ArrayKlass::cast(bottom_kl)->element_type()] : bottom_kl->external_name(),
2514 index);
2515 for (int dims = ArrayKlass::cast(a->klass())->dimension(); dims > 1; --dims) {
2516 ss.print("[]");
2517 }
2518 THROW_MSG(vmSymbols::java_lang_ArrayStoreException(), ss.as_string());
2519 }
2520 } else {
2521 ResourceMark rm(THREAD);
2522 stringStream ss;
2523 ss.print("Index %d out of bounds for length %d", index, a->length());
2524 THROW_MSG(vmSymbols::java_lang_ArrayIndexOutOfBoundsException(), ss.as_string());
2525 }
2526 JNI_END
2527
2528
2529
2530 #define DEFINE_NEWSCALARARRAY(Return,Allocator,Result \
2531 ,EntryProbe,ReturnProbe) \
2532 \
2533 DT_RETURN_MARK_DECL(New##Result##Array, Return \
2534 , ReturnProbe); \
2535 \
2536 JNI_ENTRY(Return, \
2537 jni_New##Result##Array(JNIEnv *env, jsize len)) \
2538 JNIWrapper("New" XSTR(Result) "Array"); \
2539 EntryProbe; \
2540 Return ret = NULL;\
2541 DT_RETURN_MARK(New##Result##Array, Return, (const Return&)ret);\
2542 \
2543 oop obj= oopFactory::Allocator(len, CHECK_NULL); \
2544 ret = (Return) JNIHandles::make_local(env, obj); \
2545 return ret;\
2546 JNI_END
2547
2548 DEFINE_NEWSCALARARRAY(jbooleanArray, new_boolArray, Boolean,
2549 HOTSPOT_JNI_NEWBOOLEANARRAY_ENTRY(env, len),
2550 HOTSPOT_JNI_NEWBOOLEANARRAY_RETURN(_ret_ref))
2551 DEFINE_NEWSCALARARRAY(jbyteArray, new_byteArray, Byte,
2552 HOTSPOT_JNI_NEWBYTEARRAY_ENTRY(env, len),
2553 HOTSPOT_JNI_NEWBYTEARRAY_RETURN(_ret_ref))
2554 DEFINE_NEWSCALARARRAY(jshortArray, new_shortArray, Short,
2555 HOTSPOT_JNI_NEWSHORTARRAY_ENTRY(env, len),
2556 HOTSPOT_JNI_NEWSHORTARRAY_RETURN(_ret_ref))
2557 DEFINE_NEWSCALARARRAY(jcharArray, new_charArray, Char,
2558 HOTSPOT_JNI_NEWCHARARRAY_ENTRY(env, len),
2559 HOTSPOT_JNI_NEWCHARARRAY_RETURN(_ret_ref))
2560 DEFINE_NEWSCALARARRAY(jintArray, new_intArray, Int,
2561 HOTSPOT_JNI_NEWINTARRAY_ENTRY(env, len),
2562 HOTSPOT_JNI_NEWINTARRAY_RETURN(_ret_ref))
2563 DEFINE_NEWSCALARARRAY(jlongArray, new_longArray, Long,
2564 HOTSPOT_JNI_NEWLONGARRAY_ENTRY(env, len),
2565 HOTSPOT_JNI_NEWLONGARRAY_RETURN(_ret_ref))
2566 DEFINE_NEWSCALARARRAY(jfloatArray, new_floatArray, Float,
2567 HOTSPOT_JNI_NEWFLOATARRAY_ENTRY(env, len),
2568 HOTSPOT_JNI_NEWFLOATARRAY_RETURN(_ret_ref))
2569 DEFINE_NEWSCALARARRAY(jdoubleArray, new_doubleArray, Double,
2570 HOTSPOT_JNI_NEWDOUBLEARRAY_ENTRY(env, len),
2571 HOTSPOT_JNI_NEWDOUBLEARRAY_RETURN(_ret_ref))
2572
2573 // Return an address which will fault if the caller writes to it.
2574
2575 static char* get_bad_address() {
2576 static char* bad_address = NULL;
2577 if (bad_address == NULL) {
2578 size_t size = os::vm_allocation_granularity();
2579 bad_address = os::reserve_memory(size);
2580 if (bad_address != NULL) {
2581 os::protect_memory(bad_address, size, os::MEM_PROT_READ,
2582 /*is_committed*/false);
2583 MemTracker::record_virtual_memory_type((void*)bad_address, mtInternal);
2584 }
2585 }
2586 return bad_address;
2587 }
2588
2589
2590
2591 #define DEFINE_GETSCALARARRAYELEMENTS(ElementTag,ElementType,Result, Tag \
2592 , EntryProbe, ReturnProbe) \
2593 \
2594 JNI_ENTRY_NO_PRESERVE(ElementType*, \
2595 jni_Get##Result##ArrayElements(JNIEnv *env, ElementType##Array array, jboolean *isCopy)) \
2596 JNIWrapper("Get" XSTR(Result) "ArrayElements"); \
2597 EntryProbe; \
2598 /* allocate an chunk of memory in c land */ \
2599 typeArrayOop a = typeArrayOop(JNIHandles::resolve_non_null(array)); \
2600 ElementType* result; \
2601 int len = a->length(); \
2602 if (len == 0) { \
2603 if (isCopy != NULL) { \
2604 *isCopy = JNI_FALSE; \
2605 } \
2606 /* Empty array: legal but useless, can't return NULL. \
2607 * Return a pointer to something useless. \
2608 * Avoid asserts in typeArrayOop. */ \
2609 result = (ElementType*)get_bad_address(); \
2610 } else { \
2611 /* JNI Specification states return NULL on OOM */ \
2612 result = NEW_C_HEAP_ARRAY_RETURN_NULL(ElementType, len, mtInternal); \
2613 if (result != NULL) { \
2614 /* copy the array to the c chunk */ \
2615 ArrayAccess<>::arraycopy_to_native(a, typeArrayOopDesc::element_offset<ElementType>(0), \
2616 result, len); \
2617 if (isCopy) { \
2618 *isCopy = JNI_TRUE; \
2619 } \
2620 } \
2621 } \
2622 ReturnProbe; \
2623 return result; \
2624 JNI_END
2625
2626 DEFINE_GETSCALARARRAYELEMENTS(T_BOOLEAN, jboolean, Boolean, bool
2627 , HOTSPOT_JNI_GETBOOLEANARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy),
2628 HOTSPOT_JNI_GETBOOLEANARRAYELEMENTS_RETURN((uintptr_t*)result))
2629 DEFINE_GETSCALARARRAYELEMENTS(T_BYTE, jbyte, Byte, byte
2630 , HOTSPOT_JNI_GETBYTEARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy),
2631 HOTSPOT_JNI_GETBYTEARRAYELEMENTS_RETURN((char*)result))
2632 DEFINE_GETSCALARARRAYELEMENTS(T_SHORT, jshort, Short, short
2633 , HOTSPOT_JNI_GETSHORTARRAYELEMENTS_ENTRY(env, (uint16_t*) array, (uintptr_t *) isCopy),
2634 HOTSPOT_JNI_GETSHORTARRAYELEMENTS_RETURN((uint16_t*)result))
2635 DEFINE_GETSCALARARRAYELEMENTS(T_CHAR, jchar, Char, char
2636 , HOTSPOT_JNI_GETCHARARRAYELEMENTS_ENTRY(env, (uint16_t*) array, (uintptr_t *) isCopy),
2637 HOTSPOT_JNI_GETCHARARRAYELEMENTS_RETURN(result))
2638 DEFINE_GETSCALARARRAYELEMENTS(T_INT, jint, Int, int
2639 , HOTSPOT_JNI_GETINTARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy),
2640 HOTSPOT_JNI_GETINTARRAYELEMENTS_RETURN((uint32_t*)result))
2641 DEFINE_GETSCALARARRAYELEMENTS(T_LONG, jlong, Long, long
2642 , HOTSPOT_JNI_GETLONGARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy),
2643 HOTSPOT_JNI_GETLONGARRAYELEMENTS_RETURN(((uintptr_t*)result)))
2644 // Float and double probes don't return value because dtrace doesn't currently support it
2645 DEFINE_GETSCALARARRAYELEMENTS(T_FLOAT, jfloat, Float, float
2646 , HOTSPOT_JNI_GETFLOATARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy),
2647 HOTSPOT_JNI_GETFLOATARRAYELEMENTS_RETURN(result))
2648 DEFINE_GETSCALARARRAYELEMENTS(T_DOUBLE, jdouble, Double, double
2649 , HOTSPOT_JNI_GETDOUBLEARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy),
2650 HOTSPOT_JNI_GETDOUBLEARRAYELEMENTS_RETURN(result))
2651
2652
2653 #define DEFINE_RELEASESCALARARRAYELEMENTS(ElementTag,ElementType,Result,Tag \
2654 , EntryProbe, ReturnProbe);\
2655 \
2656 JNI_ENTRY_NO_PRESERVE(void, \
2657 jni_Release##Result##ArrayElements(JNIEnv *env, ElementType##Array array, \
2658 ElementType *buf, jint mode)) \
2659 JNIWrapper("Release" XSTR(Result) "ArrayElements"); \
2660 EntryProbe; \
2661 typeArrayOop a = typeArrayOop(JNIHandles::resolve_non_null(array)); \
2662 int len = a->length(); \
2663 if (len != 0) { /* Empty array: nothing to free or copy. */ \
2664 if ((mode == 0) || (mode == JNI_COMMIT)) { \
2665 ArrayAccess<>::arraycopy_from_native(buf, a, typeArrayOopDesc::element_offset<ElementType>(0), len); \
2666 } \
2667 if ((mode == 0) || (mode == JNI_ABORT)) { \
2668 FreeHeap(buf); \
2669 } \
2670 } \
2671 ReturnProbe; \
2672 JNI_END
2673
2674 DEFINE_RELEASESCALARARRAYELEMENTS(T_BOOLEAN, jboolean, Boolean, bool
2675 , HOTSPOT_JNI_RELEASEBOOLEANARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) buf, mode),
2676 HOTSPOT_JNI_RELEASEBOOLEANARRAYELEMENTS_RETURN())
2677 DEFINE_RELEASESCALARARRAYELEMENTS(T_BYTE, jbyte, Byte, byte
2678 , HOTSPOT_JNI_RELEASEBYTEARRAYELEMENTS_ENTRY(env, array, (char *) buf, mode),
2679 HOTSPOT_JNI_RELEASEBYTEARRAYELEMENTS_RETURN())
2680 DEFINE_RELEASESCALARARRAYELEMENTS(T_SHORT, jshort, Short, short
2681 , HOTSPOT_JNI_RELEASESHORTARRAYELEMENTS_ENTRY(env, array, (uint16_t *) buf, mode),
2682 HOTSPOT_JNI_RELEASESHORTARRAYELEMENTS_RETURN())
2683 DEFINE_RELEASESCALARARRAYELEMENTS(T_CHAR, jchar, Char, char
2684 , HOTSPOT_JNI_RELEASECHARARRAYELEMENTS_ENTRY(env, array, (uint16_t *) buf, mode),
2685 HOTSPOT_JNI_RELEASECHARARRAYELEMENTS_RETURN())
2686 DEFINE_RELEASESCALARARRAYELEMENTS(T_INT, jint, Int, int
2687 , HOTSPOT_JNI_RELEASEINTARRAYELEMENTS_ENTRY(env, array, (uint32_t *) buf, mode),
2688 HOTSPOT_JNI_RELEASEINTARRAYELEMENTS_RETURN())
2689 DEFINE_RELEASESCALARARRAYELEMENTS(T_LONG, jlong, Long, long
2690 , HOTSPOT_JNI_RELEASELONGARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) buf, mode),
2691 HOTSPOT_JNI_RELEASELONGARRAYELEMENTS_RETURN())
2692 DEFINE_RELEASESCALARARRAYELEMENTS(T_FLOAT, jfloat, Float, float
2693 , HOTSPOT_JNI_RELEASEFLOATARRAYELEMENTS_ENTRY(env, array, (float *) buf, mode),
2694 HOTSPOT_JNI_RELEASEFLOATARRAYELEMENTS_RETURN())
2695 DEFINE_RELEASESCALARARRAYELEMENTS(T_DOUBLE, jdouble, Double, double
2696 , HOTSPOT_JNI_RELEASEDOUBLEARRAYELEMENTS_ENTRY(env, array, (double *) buf, mode),
2697 HOTSPOT_JNI_RELEASEDOUBLEARRAYELEMENTS_RETURN())
2698
2699 static void check_bounds(jsize start, jsize copy_len, jsize array_len, TRAPS) {
2700 ResourceMark rm(THREAD);
2701 if (copy_len < 0) {
2702 stringStream ss;
2703 ss.print("Length %d is negative", copy_len);
2704 THROW_MSG(vmSymbols::java_lang_ArrayIndexOutOfBoundsException(), ss.as_string());
2705 } else if (start < 0 || (start > array_len - copy_len)) {
2706 stringStream ss;
2707 ss.print("Array region %d.." INT64_FORMAT " out of bounds for length %d",
2708 start, (int64_t)start+(int64_t)copy_len, array_len);
2709 THROW_MSG(vmSymbols::java_lang_ArrayIndexOutOfBoundsException(), ss.as_string());
2710 }
2711 }
2712
2713 #define DEFINE_GETSCALARARRAYREGION(ElementTag,ElementType,Result, Tag \
2714 , EntryProbe, ReturnProbe); \
2715 DT_VOID_RETURN_MARK_DECL(Get##Result##ArrayRegion \
2716 , ReturnProbe); \
2717 \
2718 JNI_ENTRY(void, \
2719 jni_Get##Result##ArrayRegion(JNIEnv *env, ElementType##Array array, jsize start, \
2720 jsize len, ElementType *buf)) \
2721 JNIWrapper("Get" XSTR(Result) "ArrayRegion"); \
2722 EntryProbe; \
2723 DT_VOID_RETURN_MARK(Get##Result##ArrayRegion); \
2724 typeArrayOop src = typeArrayOop(JNIHandles::resolve_non_null(array)); \
2725 check_bounds(start, len, src->length(), CHECK); \
2726 if (len > 0) { \
2727 ArrayAccess<>::arraycopy_to_native(src, typeArrayOopDesc::element_offset<ElementType>(start), buf, len); \
2728 } \
2729 JNI_END
2730
2731 DEFINE_GETSCALARARRAYREGION(T_BOOLEAN, jboolean,Boolean, bool
2732 , HOTSPOT_JNI_GETBOOLEANARRAYREGION_ENTRY(env, array, start, len, (uintptr_t *) buf),
2733 HOTSPOT_JNI_GETBOOLEANARRAYREGION_RETURN());
2734 DEFINE_GETSCALARARRAYREGION(T_BYTE, jbyte, Byte, byte
2735 , HOTSPOT_JNI_GETBYTEARRAYREGION_ENTRY(env, array, start, len, (char *) buf),
2736 HOTSPOT_JNI_GETBYTEARRAYREGION_RETURN());
2737 DEFINE_GETSCALARARRAYREGION(T_SHORT, jshort, Short, short
2738 , HOTSPOT_JNI_GETSHORTARRAYREGION_ENTRY(env, array, start, len, (uint16_t *) buf),
2739 HOTSPOT_JNI_GETSHORTARRAYREGION_RETURN());
2740 DEFINE_GETSCALARARRAYREGION(T_CHAR, jchar, Char, char
2741 , HOTSPOT_JNI_GETCHARARRAYREGION_ENTRY(env, array, start, len, (uint16_t*) buf),
2742 HOTSPOT_JNI_GETCHARARRAYREGION_RETURN());
2743 DEFINE_GETSCALARARRAYREGION(T_INT, jint, Int, int
2744 , HOTSPOT_JNI_GETINTARRAYREGION_ENTRY(env, array, start, len, (uint32_t*) buf),
2745 HOTSPOT_JNI_GETINTARRAYREGION_RETURN());
2746 DEFINE_GETSCALARARRAYREGION(T_LONG, jlong, Long, long
2747 , HOTSPOT_JNI_GETLONGARRAYREGION_ENTRY(env, array, start, len, (uintptr_t *) buf),
2748 HOTSPOT_JNI_GETLONGARRAYREGION_RETURN());
2749 DEFINE_GETSCALARARRAYREGION(T_FLOAT, jfloat, Float, float
2750 , HOTSPOT_JNI_GETFLOATARRAYREGION_ENTRY(env, array, start, len, (float *) buf),
2751 HOTSPOT_JNI_GETFLOATARRAYREGION_RETURN());
2752 DEFINE_GETSCALARARRAYREGION(T_DOUBLE, jdouble, Double, double
2753 , HOTSPOT_JNI_GETDOUBLEARRAYREGION_ENTRY(env, array, start, len, (double *) buf),
2754 HOTSPOT_JNI_GETDOUBLEARRAYREGION_RETURN());
2755
2756
2757 #define DEFINE_SETSCALARARRAYREGION(ElementTag,ElementType,Result, Tag \
2758 , EntryProbe, ReturnProbe); \
2759 DT_VOID_RETURN_MARK_DECL(Set##Result##ArrayRegion \
2760 ,ReturnProbe); \
2761 \
2762 JNI_ENTRY(void, \
2763 jni_Set##Result##ArrayRegion(JNIEnv *env, ElementType##Array array, jsize start, \
2764 jsize len, const ElementType *buf)) \
2765 JNIWrapper("Set" XSTR(Result) "ArrayRegion"); \
2766 EntryProbe; \
2767 DT_VOID_RETURN_MARK(Set##Result##ArrayRegion); \
2768 typeArrayOop dst = typeArrayOop(JNIHandles::resolve_non_null(array)); \
2769 check_bounds(start, len, dst->length(), CHECK); \
2770 if (len > 0) { \
2771 ArrayAccess<>::arraycopy_from_native(buf, dst, typeArrayOopDesc::element_offset<ElementType>(start), len); \
2772 } \
2773 JNI_END
2774
2775 DEFINE_SETSCALARARRAYREGION(T_BOOLEAN, jboolean, Boolean, bool
2776 , HOTSPOT_JNI_SETBOOLEANARRAYREGION_ENTRY(env, array, start, len, (uintptr_t *)buf),
2777 HOTSPOT_JNI_SETBOOLEANARRAYREGION_RETURN())
2778 DEFINE_SETSCALARARRAYREGION(T_BYTE, jbyte, Byte, byte
2779 , HOTSPOT_JNI_SETBYTEARRAYREGION_ENTRY(env, array, start, len, (char *) buf),
2780 HOTSPOT_JNI_SETBYTEARRAYREGION_RETURN())
2781 DEFINE_SETSCALARARRAYREGION(T_SHORT, jshort, Short, short
2782 , HOTSPOT_JNI_SETSHORTARRAYREGION_ENTRY(env, array, start, len, (uint16_t *) buf),
2783 HOTSPOT_JNI_SETSHORTARRAYREGION_RETURN())
2784 DEFINE_SETSCALARARRAYREGION(T_CHAR, jchar, Char, char
2785 , HOTSPOT_JNI_SETCHARARRAYREGION_ENTRY(env, array, start, len, (uint16_t *) buf),
2786 HOTSPOT_JNI_SETCHARARRAYREGION_RETURN())
2787 DEFINE_SETSCALARARRAYREGION(T_INT, jint, Int, int
2788 , HOTSPOT_JNI_SETINTARRAYREGION_ENTRY(env, array, start, len, (uint32_t *) buf),
2789 HOTSPOT_JNI_SETINTARRAYREGION_RETURN())
2790 DEFINE_SETSCALARARRAYREGION(T_LONG, jlong, Long, long
2791 , HOTSPOT_JNI_SETLONGARRAYREGION_ENTRY(env, array, start, len, (uintptr_t *) buf),
2792 HOTSPOT_JNI_SETLONGARRAYREGION_RETURN())
2793 DEFINE_SETSCALARARRAYREGION(T_FLOAT, jfloat, Float, float
2794 , HOTSPOT_JNI_SETFLOATARRAYREGION_ENTRY(env, array, start, len, (float *) buf),
2795 HOTSPOT_JNI_SETFLOATARRAYREGION_RETURN())
2796 DEFINE_SETSCALARARRAYREGION(T_DOUBLE, jdouble, Double, double
2797 , HOTSPOT_JNI_SETDOUBLEARRAYREGION_ENTRY(env, array, start, len, (double *) buf),
2798 HOTSPOT_JNI_SETDOUBLEARRAYREGION_RETURN())
2799
2800
2801 DT_RETURN_MARK_DECL(RegisterNatives, jint
2802 , HOTSPOT_JNI_REGISTERNATIVES_RETURN(_ret_ref));
2803
2804 JNI_ENTRY(jint, jni_RegisterNatives(JNIEnv *env, jclass clazz,
2805 const JNINativeMethod *methods,
2806 jint nMethods))
2807 JNIWrapper("RegisterNatives");
2808 HOTSPOT_JNI_REGISTERNATIVES_ENTRY(env, clazz, (void *) methods, nMethods);
2809 jint ret = 0;
2810 DT_RETURN_MARK(RegisterNatives, jint, (const jint&)ret);
2811
2812 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz));
2813
2814 // There are no restrictions on native code registering native methods, which
2815 // allows agents to redefine the bindings to native methods. But we issue a
2816 // warning if any code running outside of the boot/platform loader is rebinding
2817 // any native methods in classes loaded by the boot/platform loader.
2818 Klass* caller = thread->security_get_caller_class(1);
2819 bool do_warning = false;
2820 oop cl = k->class_loader();
2821 if (cl == NULL || SystemDictionary::is_platform_class_loader(cl)) {
2822 // If no caller class, or caller class has a different loader, then
2823 // issue a warning below.
2824 do_warning = (caller == NULL) || caller->class_loader() != cl;
2825 }
2826
2827
2828 for (int index = 0; index < nMethods; index++) {
2829 const char* meth_name = methods[index].name;
2830 const char* meth_sig = methods[index].signature;
2831 int meth_name_len = (int)strlen(meth_name);
2832
2833 // The class should have been loaded (we have an instance of the class
2834 // passed in) so the method and signature should already be in the symbol
2835 // table. If they're not there, the method doesn't exist.
2836 TempNewSymbol name = SymbolTable::probe(meth_name, meth_name_len);
2837 TempNewSymbol signature = SymbolTable::probe(meth_sig, (int)strlen(meth_sig));
2838
2839 if (name == NULL || signature == NULL) {
2840 ResourceMark rm(THREAD);
2841 stringStream st;
2842 st.print("Method %s.%s%s not found", k->external_name(), meth_name, meth_sig);
2843 // Must return negative value on failure
2844 THROW_MSG_(vmSymbols::java_lang_NoSuchMethodError(), st.as_string(), -1);
2845 }
2846
2847 if (do_warning) {
2848 ResourceMark rm(THREAD);
2849 log_warning(jni, resolve)("Re-registering of platform native method: %s.%s%s "
2850 "from code in a different classloader", k->external_name(), meth_name, meth_sig);
2851 }
2852
2853 bool res = Method::register_native(k, name, signature,
2854 (address) methods[index].fnPtr, THREAD);
2855 if (!res) {
2856 ret = -1;
2857 break;
2858 }
2859 }
2860 return ret;
2861 JNI_END
2862
2863
2864 JNI_ENTRY(jint, jni_UnregisterNatives(JNIEnv *env, jclass clazz))
2865 JNIWrapper("UnregisterNatives");
2866 HOTSPOT_JNI_UNREGISTERNATIVES_ENTRY(env, clazz);
2867 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz));
2868 //%note jni_2
2869 if (k->is_instance_klass()) {
2870 for (int index = 0; index < InstanceKlass::cast(k)->methods()->length(); index++) {
2871 Method* m = InstanceKlass::cast(k)->methods()->at(index);
2872 if (m->is_native()) {
2873 m->clear_native_function();
2874 m->set_signature_handler(NULL);
2875 }
2876 }
2877 }
2878 HOTSPOT_JNI_UNREGISTERNATIVES_RETURN(0);
2879 return 0;
2880 JNI_END
2881
2882 //
2883 // Monitor functions
2884 //
2885
2886 DT_RETURN_MARK_DECL(MonitorEnter, jint
2887 , HOTSPOT_JNI_MONITORENTER_RETURN(_ret_ref));
2888
2889 JNI_ENTRY(jint, jni_MonitorEnter(JNIEnv *env, jobject jobj))
2890 HOTSPOT_JNI_MONITORENTER_ENTRY(env, jobj);
2891 jint ret = JNI_ERR;
2892 DT_RETURN_MARK(MonitorEnter, jint, (const jint&)ret);
2893
2894 // If the object is null, we can't do anything with it
2895 if (jobj == NULL) {
2896 THROW_(vmSymbols::java_lang_NullPointerException(), JNI_ERR);
2897 }
2898
2899 Handle obj(thread, JNIHandles::resolve_non_null(jobj));
2900 ObjectSynchronizer::jni_enter(obj, CHECK_(JNI_ERR));
2901 ret = JNI_OK;
2902 return ret;
2903 JNI_END
2904
2905 DT_RETURN_MARK_DECL(MonitorExit, jint
2906 , HOTSPOT_JNI_MONITOREXIT_RETURN(_ret_ref));
2907
2908 JNI_ENTRY(jint, jni_MonitorExit(JNIEnv *env, jobject jobj))
2909 HOTSPOT_JNI_MONITOREXIT_ENTRY(env, jobj);
2910 jint ret = JNI_ERR;
2911 DT_RETURN_MARK(MonitorExit, jint, (const jint&)ret);
2912
2913 // Don't do anything with a null object
2914 if (jobj == NULL) {
2915 THROW_(vmSymbols::java_lang_NullPointerException(), JNI_ERR);
2916 }
2917
2918 Handle obj(THREAD, JNIHandles::resolve_non_null(jobj));
2919 ObjectSynchronizer::jni_exit(obj(), CHECK_(JNI_ERR));
2920
2921 ret = JNI_OK;
2922 return ret;
2923 JNI_END
2924
2925 //
2926 // Extensions
2927 //
2928
2929 DT_VOID_RETURN_MARK_DECL(GetStringRegion
2930 , HOTSPOT_JNI_GETSTRINGREGION_RETURN());
2931
2932 JNI_ENTRY(void, jni_GetStringRegion(JNIEnv *env, jstring string, jsize start, jsize len, jchar *buf))
2933 JNIWrapper("GetStringRegion");
2934 HOTSPOT_JNI_GETSTRINGREGION_ENTRY(env, string, start, len, buf);
2935 DT_VOID_RETURN_MARK(GetStringRegion);
2936 oop s = JNIHandles::resolve_non_null(string);
2937 typeArrayOop s_value = java_lang_String::value(s);
2938 int s_len = java_lang_String::length(s, s_value);
2939 if (start < 0 || len < 0 || start > s_len - len) {
2940 THROW(vmSymbols::java_lang_StringIndexOutOfBoundsException());
2941 } else {
2942 if (len > 0) {
2943 bool is_latin1 = java_lang_String::is_latin1(s);
2944 if (!is_latin1) {
2945 ArrayAccess<>::arraycopy_to_native(s_value, typeArrayOopDesc::element_offset<jchar>(start),
2946 buf, len);
2947 } else {
2948 for (int i = 0; i < len; i++) {
2949 buf[i] = ((jchar) s_value->byte_at(i + start)) & 0xff;
2950 }
2951 }
2952 }
2953 }
2954 JNI_END
2955
2956 DT_VOID_RETURN_MARK_DECL(GetStringUTFRegion
2957 , HOTSPOT_JNI_GETSTRINGUTFREGION_RETURN());
2958
2959 JNI_ENTRY(void, jni_GetStringUTFRegion(JNIEnv *env, jstring string, jsize start, jsize len, char *buf))
2960 JNIWrapper("GetStringUTFRegion");
2961 HOTSPOT_JNI_GETSTRINGUTFREGION_ENTRY(env, string, start, len, buf);
2962 DT_VOID_RETURN_MARK(GetStringUTFRegion);
2963 oop s = JNIHandles::resolve_non_null(string);
2964 typeArrayOop s_value = java_lang_String::value(s);
2965 int s_len = java_lang_String::length(s, s_value);
2966 if (start < 0 || len < 0 || start > s_len - len) {
2967 THROW(vmSymbols::java_lang_StringIndexOutOfBoundsException());
2968 } else {
2969 //%note jni_7
2970 if (len > 0) {
2971 // Assume the buffer is large enough as the JNI spec. does not require user error checking
2972 java_lang_String::as_utf8_string(s, s_value, start, len, buf, INT_MAX);
2973 // as_utf8_string null-terminates the result string
2974 } else {
2975 // JDK null-terminates the buffer even in len is zero
2976 if (buf != NULL) {
2977 buf[0] = 0;
2978 }
2979 }
2980 }
2981 JNI_END
2982
2983 static oop lock_gc_or_pin_object(JavaThread* thread, jobject obj) {
2984 if (Universe::heap()->supports_object_pinning()) {
2985 const oop o = JNIHandles::resolve_non_null(obj);
2986 return Universe::heap()->pin_object(thread, o);
2987 } else {
2988 GCLocker::lock_critical(thread);
2989 return JNIHandles::resolve_non_null(obj);
2990 }
2991 }
2992
2993 static void unlock_gc_or_unpin_object(JavaThread* thread, jobject obj) {
2994 if (Universe::heap()->supports_object_pinning()) {
2995 const oop o = JNIHandles::resolve_non_null(obj);
2996 return Universe::heap()->unpin_object(thread, o);
2997 } else {
2998 GCLocker::unlock_critical(thread);
2999 }
3000 }
3001
3002 JNI_ENTRY(void*, jni_GetPrimitiveArrayCritical(JNIEnv *env, jarray array, jboolean *isCopy))
3003 JNIWrapper("GetPrimitiveArrayCritical");
3004 HOTSPOT_JNI_GETPRIMITIVEARRAYCRITICAL_ENTRY(env, array, (uintptr_t *) isCopy);
3005 if (isCopy != NULL) {
3006 *isCopy = JNI_FALSE;
3007 }
3008 oop a = lock_gc_or_pin_object(thread, array);
3009 assert(a->is_array(), "just checking");
3010 BasicType type;
3011 if (a->is_objArray()) {
3012 type = T_OBJECT;
3013 } else {
3014 type = TypeArrayKlass::cast(a->klass())->element_type();
3015 }
3016 void* ret = arrayOop(a)->base(type);
3017 HOTSPOT_JNI_GETPRIMITIVEARRAYCRITICAL_RETURN(ret);
3018 return ret;
3019 JNI_END
3020
3021
3022 JNI_ENTRY(void, jni_ReleasePrimitiveArrayCritical(JNIEnv *env, jarray array, void *carray, jint mode))
3023 JNIWrapper("ReleasePrimitiveArrayCritical");
3024 HOTSPOT_JNI_RELEASEPRIMITIVEARRAYCRITICAL_ENTRY(env, array, carray, mode);
3025 unlock_gc_or_unpin_object(thread, array);
3026 HOTSPOT_JNI_RELEASEPRIMITIVEARRAYCRITICAL_RETURN();
3027 JNI_END
3028
3029
3030 JNI_ENTRY(const jchar*, jni_GetStringCritical(JNIEnv *env, jstring string, jboolean *isCopy))
3031 JNIWrapper("GetStringCritical");
3032 HOTSPOT_JNI_GETSTRINGCRITICAL_ENTRY(env, string, (uintptr_t *) isCopy);
3033 oop s = lock_gc_or_pin_object(thread, string);
3034 typeArrayOop s_value = java_lang_String::value(s);
3035 bool is_latin1 = java_lang_String::is_latin1(s);
3036 if (isCopy != NULL) {
3037 *isCopy = is_latin1 ? JNI_TRUE : JNI_FALSE;
3038 }
3039 jchar* ret;
3040 if (!is_latin1) {
3041 ret = (jchar*) s_value->base(T_CHAR);
3042 } else {
3043 // Inflate latin1 encoded string to UTF16
3044 int s_len = java_lang_String::length(s, s_value);
3045 ret = NEW_C_HEAP_ARRAY_RETURN_NULL(jchar, s_len + 1, mtInternal); // add one for zero termination
3046 /* JNI Specification states return NULL on OOM */
3047 if (ret != NULL) {
3048 for (int i = 0; i < s_len; i++) {
3049 ret[i] = ((jchar) s_value->byte_at(i)) & 0xff;
3050 }
3051 ret[s_len] = 0;
3052 }
3053 }
3054 HOTSPOT_JNI_GETSTRINGCRITICAL_RETURN((uint16_t *) ret);
3055 return ret;
3056 JNI_END
3057
3058
3059 JNI_ENTRY(void, jni_ReleaseStringCritical(JNIEnv *env, jstring str, const jchar *chars))
3060 JNIWrapper("ReleaseStringCritical");
3061 HOTSPOT_JNI_RELEASESTRINGCRITICAL_ENTRY(env, str, (uint16_t *) chars);
3062 // The str and chars arguments are ignored for UTF16 strings
3063 oop s = JNIHandles::resolve_non_null(str);
3064 bool is_latin1 = java_lang_String::is_latin1(s);
3065 if (is_latin1) {
3066 // For latin1 string, free jchar array allocated by earlier call to GetStringCritical.
3067 // This assumes that ReleaseStringCritical bookends GetStringCritical.
3068 FREE_C_HEAP_ARRAY(jchar, chars);
3069 }
3070 unlock_gc_or_unpin_object(thread, str);
3071 HOTSPOT_JNI_RELEASESTRINGCRITICAL_RETURN();
3072 JNI_END
3073
3074
3075 JNI_ENTRY(jweak, jni_NewWeakGlobalRef(JNIEnv *env, jobject ref))
3076 JNIWrapper("jni_NewWeakGlobalRef");
3077 HOTSPOT_JNI_NEWWEAKGLOBALREF_ENTRY(env, ref);
3078 Handle ref_handle(thread, JNIHandles::resolve(ref));
3079 jweak ret = JNIHandles::make_weak_global(ref_handle);
3080 HOTSPOT_JNI_NEWWEAKGLOBALREF_RETURN(ret);
3081 return ret;
3082 JNI_END
3083
3084 // Must be JNI_ENTRY (with HandleMark)
3085 JNI_ENTRY(void, jni_DeleteWeakGlobalRef(JNIEnv *env, jweak ref))
3086 JNIWrapper("jni_DeleteWeakGlobalRef");
3087 HOTSPOT_JNI_DELETEWEAKGLOBALREF_ENTRY(env, ref);
3088 JNIHandles::destroy_weak_global(ref);
3089 HOTSPOT_JNI_DELETEWEAKGLOBALREF_RETURN();
3090 JNI_END
3091
3092
3093 JNI_ENTRY_NO_PRESERVE(jboolean, jni_ExceptionCheck(JNIEnv *env))
3094 JNIWrapper("jni_ExceptionCheck");
3095 HOTSPOT_JNI_EXCEPTIONCHECK_ENTRY(env);
3096 jni_check_async_exceptions(thread);
3097 jboolean ret = (thread->has_pending_exception()) ? JNI_TRUE : JNI_FALSE;
3098 HOTSPOT_JNI_EXCEPTIONCHECK_RETURN(ret);
3099 return ret;
3100 JNI_END
3101
3102
3103 // Initialization state for three routines below relating to
3104 // java.nio.DirectBuffers
3105 static int directBufferSupportInitializeStarted = 0;
3106 static volatile int directBufferSupportInitializeEnded = 0;
3107 static volatile int directBufferSupportInitializeFailed = 0;
3108 static jclass bufferClass = NULL;
3109 static jclass directBufferClass = NULL;
3110 static jclass directByteBufferClass = NULL;
3111 static jmethodID directByteBufferConstructor = NULL;
3112 static jfieldID directBufferAddressField = NULL;
3113 static jfieldID bufferCapacityField = NULL;
3114
3115 static jclass lookupOne(JNIEnv* env, const char* name, TRAPS) {
3116 Handle loader; // null (bootstrap) loader
3117 Handle protection_domain; // null protection domain
3118
3119 TempNewSymbol sym = SymbolTable::new_symbol(name);
3120 jclass result = find_class_from_class_loader(env, sym, true, loader, protection_domain, true, CHECK_NULL);
3121
3122 if (log_is_enabled(Debug, class, resolve) && result != NULL) {
3123 trace_class_resolution(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(result)));
3124 }
3125 return result;
3126 }
3127
3128 // These lookups are done with the NULL (bootstrap) ClassLoader to
3129 // circumvent any security checks that would be done by jni_FindClass.
3130 JNI_ENTRY(bool, lookupDirectBufferClasses(JNIEnv* env))
3131 {
3132 if ((bufferClass = lookupOne(env, "java/nio/Buffer", thread)) == NULL) { return false; }
3133 if ((directBufferClass = lookupOne(env, "sun/nio/ch/DirectBuffer", thread)) == NULL) { return false; }
3134 if ((directByteBufferClass = lookupOne(env, "java/nio/DirectByteBuffer", thread)) == NULL) { return false; }
3135 return true;
3136 }
3137 JNI_END
3138
3139
3140 static bool initializeDirectBufferSupport(JNIEnv* env, JavaThread* thread) {
3141 if (directBufferSupportInitializeFailed) {
3142 return false;
3143 }
3144
3145 if (Atomic::cmpxchg(&directBufferSupportInitializeStarted, 0, 1) == 0) {
3146 if (!lookupDirectBufferClasses(env)) {
3147 directBufferSupportInitializeFailed = 1;
3148 return false;
3149 }
3150
3151 // Make global references for these
3152 bufferClass = (jclass) env->NewGlobalRef(bufferClass);
3153 directBufferClass = (jclass) env->NewGlobalRef(directBufferClass);
3154 directByteBufferClass = (jclass) env->NewGlobalRef(directByteBufferClass);
3155
3156 // Get needed field and method IDs
3157 directByteBufferConstructor = env->GetMethodID(directByteBufferClass, "<init>", "(JI)V");
3158 if (env->ExceptionCheck()) {
3159 env->ExceptionClear();
3160 directBufferSupportInitializeFailed = 1;
3161 return false;
3162 }
3163 directBufferAddressField = env->GetFieldID(bufferClass, "address", "J");
3164 if (env->ExceptionCheck()) {
3165 env->ExceptionClear();
3166 directBufferSupportInitializeFailed = 1;
3167 return false;
3168 }
3169 bufferCapacityField = env->GetFieldID(bufferClass, "capacity", "I");
3170 if (env->ExceptionCheck()) {
3171 env->ExceptionClear();
3172 directBufferSupportInitializeFailed = 1;
3173 return false;
3174 }
3175
3176 if ((directByteBufferConstructor == NULL) ||
3177 (directBufferAddressField == NULL) ||
3178 (bufferCapacityField == NULL)) {
3179 directBufferSupportInitializeFailed = 1;
3180 return false;
3181 }
3182
3183 directBufferSupportInitializeEnded = 1;
3184 } else {
3185 while (!directBufferSupportInitializeEnded && !directBufferSupportInitializeFailed) {
3186 os::naked_yield();
3187 }
3188 }
3189
3190 return !directBufferSupportInitializeFailed;
3191 }
3192
3193 extern "C" jobject JNICALL jni_NewDirectByteBuffer(JNIEnv *env, void* address, jlong capacity)
3194 {
3195 // thread_from_jni_environment() will block if VM is gone.
3196 JavaThread* thread = JavaThread::thread_from_jni_environment(env);
3197
3198 JNIWrapper("jni_NewDirectByteBuffer");
3199 HOTSPOT_JNI_NEWDIRECTBYTEBUFFER_ENTRY(env, address, capacity);
3200
3201 if (!directBufferSupportInitializeEnded) {
3202 if (!initializeDirectBufferSupport(env, thread)) {
3203 HOTSPOT_JNI_NEWDIRECTBYTEBUFFER_RETURN(NULL);
3204 return NULL;
3205 }
3206 }
3207
3208 // Being paranoid about accidental sign extension on address
3209 jlong addr = (jlong) ((uintptr_t) address);
3210 // NOTE that package-private DirectByteBuffer constructor currently
3211 // takes int capacity
3212 jint cap = (jint) capacity;
3213 jobject ret = env->NewObject(directByteBufferClass, directByteBufferConstructor, addr, cap);
3214 HOTSPOT_JNI_NEWDIRECTBYTEBUFFER_RETURN(ret);
3215 return ret;
3216 }
3217
3218 DT_RETURN_MARK_DECL(GetDirectBufferAddress, void*
3219 , HOTSPOT_JNI_GETDIRECTBUFFERADDRESS_RETURN((void*) _ret_ref));
3220
3221 extern "C" void* JNICALL jni_GetDirectBufferAddress(JNIEnv *env, jobject buf)
3222 {
3223 // thread_from_jni_environment() will block if VM is gone.
3224 JavaThread* thread = JavaThread::thread_from_jni_environment(env);
3225
3226 JNIWrapper("jni_GetDirectBufferAddress");
3227 HOTSPOT_JNI_GETDIRECTBUFFERADDRESS_ENTRY(env, buf);
3228 void* ret = NULL;
3229 DT_RETURN_MARK(GetDirectBufferAddress, void*, (const void*&)ret);
3230
3231 if (!directBufferSupportInitializeEnded) {
3232 if (!initializeDirectBufferSupport(env, thread)) {
3233 return 0;
3234 }
3235 }
3236
3237 if ((buf != NULL) && (!env->IsInstanceOf(buf, directBufferClass))) {
3238 return 0;
3239 }
3240
3241 ret = (void*)(intptr_t)env->GetLongField(buf, directBufferAddressField);
3242 return ret;
3243 }
3244
3245 DT_RETURN_MARK_DECL(GetDirectBufferCapacity, jlong
3246 , HOTSPOT_JNI_GETDIRECTBUFFERCAPACITY_RETURN(_ret_ref));
3247
3248 extern "C" jlong JNICALL jni_GetDirectBufferCapacity(JNIEnv *env, jobject buf)
3249 {
3250 // thread_from_jni_environment() will block if VM is gone.
3251 JavaThread* thread = JavaThread::thread_from_jni_environment(env);
3252
3253 JNIWrapper("jni_GetDirectBufferCapacity");
3254 HOTSPOT_JNI_GETDIRECTBUFFERCAPACITY_ENTRY(env, buf);
3255 jlong ret = -1;
3256 DT_RETURN_MARK(GetDirectBufferCapacity, jlong, (const jlong&)ret);
3257
3258 if (!directBufferSupportInitializeEnded) {
3259 if (!initializeDirectBufferSupport(env, thread)) {
3260 ret = 0;
3261 return ret;
3262 }
3263 }
3264
3265 if (buf == NULL) {
3266 return -1;
3267 }
3268
3269 if (!env->IsInstanceOf(buf, directBufferClass)) {
3270 return -1;
3271 }
3272
3273 // NOTE that capacity is currently an int in the implementation
3274 ret = env->GetIntField(buf, bufferCapacityField);
3275 return ret;
3276 }
3277
3278
3279 JNI_LEAF(jint, jni_GetVersion(JNIEnv *env))
3280 JNIWrapper("GetVersion");
3281 HOTSPOT_JNI_GETVERSION_ENTRY(env);
3282 HOTSPOT_JNI_GETVERSION_RETURN(CurrentVersion);
3283 return CurrentVersion;
3284 JNI_END
3285
3286 extern struct JavaVM_ main_vm;
3287
3288 JNI_LEAF(jint, jni_GetJavaVM(JNIEnv *env, JavaVM **vm))
3289 JNIWrapper("jni_GetJavaVM");
3290 HOTSPOT_JNI_GETJAVAVM_ENTRY(env, (void **) vm);
3291 *vm = (JavaVM *)(&main_vm);
3292 HOTSPOT_JNI_GETJAVAVM_RETURN(JNI_OK);
3293 return JNI_OK;
3294 JNI_END
3295
3296
3297 JNI_ENTRY(jobject, jni_GetModule(JNIEnv* env, jclass clazz))
3298 JNIWrapper("GetModule");
3299 return Modules::get_module(clazz, THREAD);
3300 JNI_END
3301
3302
3303 // Structure containing all jni functions
3304 struct JNINativeInterface_ jni_NativeInterface = {
3305 NULL,
3306 NULL,
3307 NULL,
3308
3309 NULL,
3310
3311 jni_GetVersion,
3312
3313 jni_DefineClass,
3314 jni_FindClass,
3315
3316 jni_FromReflectedMethod,
3317 jni_FromReflectedField,
3318
3319 jni_ToReflectedMethod,
3320
3321 jni_GetSuperclass,
3322 jni_IsAssignableFrom,
3323
3324 jni_ToReflectedField,
3325
3326 jni_Throw,
3327 jni_ThrowNew,
3328 jni_ExceptionOccurred,
3329 jni_ExceptionDescribe,
3330 jni_ExceptionClear,
3331 jni_FatalError,
3332
3333 jni_PushLocalFrame,
3334 jni_PopLocalFrame,
3335
3336 jni_NewGlobalRef,
3337 jni_DeleteGlobalRef,
3338 jni_DeleteLocalRef,
3339 jni_IsSameObject,
3340
3341 jni_NewLocalRef,
3342 jni_EnsureLocalCapacity,
3343
3344 jni_AllocObject,
3345 jni_NewObject,
3346 jni_NewObjectV,
3347 jni_NewObjectA,
3348
3349 jni_GetObjectClass,
3350 jni_IsInstanceOf,
3351
3352 jni_GetMethodID,
3353
3354 jni_CallObjectMethod,
3355 jni_CallObjectMethodV,
3356 jni_CallObjectMethodA,
3357 jni_CallBooleanMethod,
3358 jni_CallBooleanMethodV,
3359 jni_CallBooleanMethodA,
3360 jni_CallByteMethod,
3361 jni_CallByteMethodV,
3362 jni_CallByteMethodA,
3363 jni_CallCharMethod,
3364 jni_CallCharMethodV,
3365 jni_CallCharMethodA,
3366 jni_CallShortMethod,
3367 jni_CallShortMethodV,
3368 jni_CallShortMethodA,
3369 jni_CallIntMethod,
3370 jni_CallIntMethodV,
3371 jni_CallIntMethodA,
3372 jni_CallLongMethod,
3373 jni_CallLongMethodV,
3374 jni_CallLongMethodA,
3375 jni_CallFloatMethod,
3376 jni_CallFloatMethodV,
3377 jni_CallFloatMethodA,
3378 jni_CallDoubleMethod,
3379 jni_CallDoubleMethodV,
3380 jni_CallDoubleMethodA,
3381 jni_CallVoidMethod,
3382 jni_CallVoidMethodV,
3383 jni_CallVoidMethodA,
3384
3385 jni_CallNonvirtualObjectMethod,
3386 jni_CallNonvirtualObjectMethodV,
3387 jni_CallNonvirtualObjectMethodA,
3388 jni_CallNonvirtualBooleanMethod,
3389 jni_CallNonvirtualBooleanMethodV,
3390 jni_CallNonvirtualBooleanMethodA,
3391 jni_CallNonvirtualByteMethod,
3392 jni_CallNonvirtualByteMethodV,
3393 jni_CallNonvirtualByteMethodA,
3394 jni_CallNonvirtualCharMethod,
3395 jni_CallNonvirtualCharMethodV,
3396 jni_CallNonvirtualCharMethodA,
3397 jni_CallNonvirtualShortMethod,
3398 jni_CallNonvirtualShortMethodV,
3399 jni_CallNonvirtualShortMethodA,
3400 jni_CallNonvirtualIntMethod,
3401 jni_CallNonvirtualIntMethodV,
3402 jni_CallNonvirtualIntMethodA,
3403 jni_CallNonvirtualLongMethod,
3404 jni_CallNonvirtualLongMethodV,
3405 jni_CallNonvirtualLongMethodA,
3406 jni_CallNonvirtualFloatMethod,
3407 jni_CallNonvirtualFloatMethodV,
3408 jni_CallNonvirtualFloatMethodA,
3409 jni_CallNonvirtualDoubleMethod,
3410 jni_CallNonvirtualDoubleMethodV,
3411 jni_CallNonvirtualDoubleMethodA,
3412 jni_CallNonvirtualVoidMethod,
3413 jni_CallNonvirtualVoidMethodV,
3414 jni_CallNonvirtualVoidMethodA,
3415
3416 jni_GetFieldID,
3417
3418 jni_GetObjectField,
3419 jni_GetBooleanField,
3420 jni_GetByteField,
3421 jni_GetCharField,
3422 jni_GetShortField,
3423 jni_GetIntField,
3424 jni_GetLongField,
3425 jni_GetFloatField,
3426 jni_GetDoubleField,
3427
3428 jni_SetObjectField,
3429 jni_SetBooleanField,
3430 jni_SetByteField,
3431 jni_SetCharField,
3432 jni_SetShortField,
3433 jni_SetIntField,
3434 jni_SetLongField,
3435 jni_SetFloatField,
3436 jni_SetDoubleField,
3437
3438 jni_GetStaticMethodID,
3439
3440 jni_CallStaticObjectMethod,
3441 jni_CallStaticObjectMethodV,
3442 jni_CallStaticObjectMethodA,
3443 jni_CallStaticBooleanMethod,
3444 jni_CallStaticBooleanMethodV,
3445 jni_CallStaticBooleanMethodA,
3446 jni_CallStaticByteMethod,
3447 jni_CallStaticByteMethodV,
3448 jni_CallStaticByteMethodA,
3449 jni_CallStaticCharMethod,
3450 jni_CallStaticCharMethodV,
3451 jni_CallStaticCharMethodA,
3452 jni_CallStaticShortMethod,
3453 jni_CallStaticShortMethodV,
3454 jni_CallStaticShortMethodA,
3455 jni_CallStaticIntMethod,
3456 jni_CallStaticIntMethodV,
3457 jni_CallStaticIntMethodA,
3458 jni_CallStaticLongMethod,
3459 jni_CallStaticLongMethodV,
3460 jni_CallStaticLongMethodA,
3461 jni_CallStaticFloatMethod,
3462 jni_CallStaticFloatMethodV,
3463 jni_CallStaticFloatMethodA,
3464 jni_CallStaticDoubleMethod,
3465 jni_CallStaticDoubleMethodV,
3466 jni_CallStaticDoubleMethodA,
3467 jni_CallStaticVoidMethod,
3468 jni_CallStaticVoidMethodV,
3469 jni_CallStaticVoidMethodA,
3470
3471 jni_GetStaticFieldID,
3472
3473 jni_GetStaticObjectField,
3474 jni_GetStaticBooleanField,
3475 jni_GetStaticByteField,
3476 jni_GetStaticCharField,
3477 jni_GetStaticShortField,
3478 jni_GetStaticIntField,
3479 jni_GetStaticLongField,
3480 jni_GetStaticFloatField,
3481 jni_GetStaticDoubleField,
3482
3483 jni_SetStaticObjectField,
3484 jni_SetStaticBooleanField,
3485 jni_SetStaticByteField,
3486 jni_SetStaticCharField,
3487 jni_SetStaticShortField,
3488 jni_SetStaticIntField,
3489 jni_SetStaticLongField,
3490 jni_SetStaticFloatField,
3491 jni_SetStaticDoubleField,
3492
3493 jni_NewString,
3494 jni_GetStringLength,
3495 jni_GetStringChars,
3496 jni_ReleaseStringChars,
3497
3498 jni_NewStringUTF,
3499 jni_GetStringUTFLength,
3500 jni_GetStringUTFChars,
3501 jni_ReleaseStringUTFChars,
3502
3503 jni_GetArrayLength,
3504
3505 jni_NewObjectArray,
3506 jni_GetObjectArrayElement,
3507 jni_SetObjectArrayElement,
3508
3509 jni_NewBooleanArray,
3510 jni_NewByteArray,
3511 jni_NewCharArray,
3512 jni_NewShortArray,
3513 jni_NewIntArray,
3514 jni_NewLongArray,
3515 jni_NewFloatArray,
3516 jni_NewDoubleArray,
3517
3518 jni_GetBooleanArrayElements,
3519 jni_GetByteArrayElements,
3520 jni_GetCharArrayElements,
3521 jni_GetShortArrayElements,
3522 jni_GetIntArrayElements,
3523 jni_GetLongArrayElements,
3524 jni_GetFloatArrayElements,
3525 jni_GetDoubleArrayElements,
3526
3527 jni_ReleaseBooleanArrayElements,
3528 jni_ReleaseByteArrayElements,
3529 jni_ReleaseCharArrayElements,
3530 jni_ReleaseShortArrayElements,
3531 jni_ReleaseIntArrayElements,
3532 jni_ReleaseLongArrayElements,
3533 jni_ReleaseFloatArrayElements,
3534 jni_ReleaseDoubleArrayElements,
3535
3536 jni_GetBooleanArrayRegion,
3537 jni_GetByteArrayRegion,
3538 jni_GetCharArrayRegion,
3539 jni_GetShortArrayRegion,
3540 jni_GetIntArrayRegion,
3541 jni_GetLongArrayRegion,
3542 jni_GetFloatArrayRegion,
3543 jni_GetDoubleArrayRegion,
3544
3545 jni_SetBooleanArrayRegion,
3546 jni_SetByteArrayRegion,
3547 jni_SetCharArrayRegion,
3548 jni_SetShortArrayRegion,
3549 jni_SetIntArrayRegion,
3550 jni_SetLongArrayRegion,
3551 jni_SetFloatArrayRegion,
3552 jni_SetDoubleArrayRegion,
3553
3554 jni_RegisterNatives,
3555 jni_UnregisterNatives,
3556
3557 jni_MonitorEnter,
3558 jni_MonitorExit,
3559
3560 jni_GetJavaVM,
3561
3562 jni_GetStringRegion,
3563 jni_GetStringUTFRegion,
3564
3565 jni_GetPrimitiveArrayCritical,
3566 jni_ReleasePrimitiveArrayCritical,
3567
3568 jni_GetStringCritical,
3569 jni_ReleaseStringCritical,
3570
3571 jni_NewWeakGlobalRef,
3572 jni_DeleteWeakGlobalRef,
3573
3574 jni_ExceptionCheck,
3575
3576 jni_NewDirectByteBuffer,
3577 jni_GetDirectBufferAddress,
3578 jni_GetDirectBufferCapacity,
3579
3580 // New 1_6 features
3581
3582 jni_GetObjectRefType,
3583
3584 // Module features
3585
3586 jni_GetModule
3587 };
3588
3589
3590 // For jvmti use to modify jni function table.
3591 // Java threads in native contiues to run until it is transitioned
3592 // to VM at safepoint. Before the transition or before it is blocked
3593 // for safepoint it may access jni function table. VM could crash if
3594 // any java thread access the jni function table in the middle of memcpy.
3595 // To avoid this each function pointers are copied automically.
3596 void copy_jni_function_table(const struct JNINativeInterface_ *new_jni_NativeInterface) {
3597 assert(SafepointSynchronize::is_at_safepoint(), "must be at safepoint");
3598 intptr_t *a = (intptr_t *) jni_functions();
3599 intptr_t *b = (intptr_t *) new_jni_NativeInterface;
3600 for (uint i=0; i < sizeof(struct JNINativeInterface_)/sizeof(void *); i++) {
3601 Atomic::store(a++, *b++);
3602 }
3603 }
3604
3605 void quicken_jni_functions() {
3606 // Replace Get<Primitive>Field with fast versions
3607 if (UseFastJNIAccessors && !VerifyJNIFields && !CountJNICalls && !CheckJNICalls) {
3608 address func;
3609 func = JNI_FastGetField::generate_fast_get_boolean_field();
3610 if (func != (address)-1) {
3611 jni_NativeInterface.GetBooleanField = (GetBooleanField_t)func;
3612 }
3613 func = JNI_FastGetField::generate_fast_get_byte_field();
3614 if (func != (address)-1) {
3615 jni_NativeInterface.GetByteField = (GetByteField_t)func;
3616 }
3617 func = JNI_FastGetField::generate_fast_get_char_field();
3618 if (func != (address)-1) {
3619 jni_NativeInterface.GetCharField = (GetCharField_t)func;
3620 }
3621 func = JNI_FastGetField::generate_fast_get_short_field();
3622 if (func != (address)-1) {
3623 jni_NativeInterface.GetShortField = (GetShortField_t)func;
3624 }
3625 func = JNI_FastGetField::generate_fast_get_int_field();
3626 if (func != (address)-1) {
3627 jni_NativeInterface.GetIntField = (GetIntField_t)func;
3628 }
3629 func = JNI_FastGetField::generate_fast_get_long_field();
3630 if (func != (address)-1) {
3631 jni_NativeInterface.GetLongField = (GetLongField_t)func;
3632 }
3633 func = JNI_FastGetField::generate_fast_get_float_field();
3634 if (func != (address)-1) {
3635 jni_NativeInterface.GetFloatField = (GetFloatField_t)func;
3636 }
3637 func = JNI_FastGetField::generate_fast_get_double_field();
3638 if (func != (address)-1) {
3639 jni_NativeInterface.GetDoubleField = (GetDoubleField_t)func;
3640 }
3641 }
3642 }
3643
3644 // Returns the function structure
3645 struct JNINativeInterface_* jni_functions() {
3646 #if INCLUDE_JNI_CHECK
3647 if (CheckJNICalls) return jni_functions_check();
3648 #endif // INCLUDE_JNI_CHECK
3649 return &jni_NativeInterface;
3650 }
3651
3652 // Returns the function structure
3653 struct JNINativeInterface_* jni_functions_nocheck() {
3654 return &jni_NativeInterface;
3655 }
3656
3657 static void post_thread_start_event(const JavaThread* jt) {
3658 assert(jt != NULL, "invariant");
3659 EventThreadStart event;
3660 if (event.should_commit()) {
3661 event.set_thread(JFR_THREAD_ID(jt));
3662 event.set_parentThread((traceid)0);
3663 #if INCLUDE_JFR
3664 if (EventThreadStart::is_stacktrace_enabled()) {
3665 jt->jfr_thread_local()->set_cached_stack_trace_id((traceid)0);
3666 event.commit();
3667 jt->jfr_thread_local()->clear_cached_stack_trace();
3668 } else
3669 #endif
3670 {
3671 event.commit();
3672 }
3673 }
3674 }
3675
3676 // Invocation API
3677
3678
3679 // Forward declaration
3680 extern const struct JNIInvokeInterface_ jni_InvokeInterface;
3681
3682 // Global invocation API vars
3683 volatile int vm_created = 0;
3684 // Indicate whether it is safe to recreate VM. Recreation is only
3685 // possible after a failed initial creation attempt in some cases.
3686 volatile int safe_to_recreate_vm = 1;
3687 struct JavaVM_ main_vm = {&jni_InvokeInterface};
3688
3689
3690 #define JAVASTACKSIZE (400 * 1024) /* Default size of a thread java stack */
3691 enum { VERIFY_NONE, VERIFY_REMOTE, VERIFY_ALL };
3692
3693 DT_RETURN_MARK_DECL(GetDefaultJavaVMInitArgs, jint
3694 , HOTSPOT_JNI_GETDEFAULTJAVAVMINITARGS_RETURN(_ret_ref));
3695
3696 _JNI_IMPORT_OR_EXPORT_ jint JNICALL JNI_GetDefaultJavaVMInitArgs(void *args_) {
3697 HOTSPOT_JNI_GETDEFAULTJAVAVMINITARGS_ENTRY(args_);
3698 JDK1_1InitArgs *args = (JDK1_1InitArgs *)args_;
3699 jint ret = JNI_ERR;
3700 DT_RETURN_MARK(GetDefaultJavaVMInitArgs, jint, (const jint&)ret);
3701
3702 if (Threads::is_supported_jni_version(args->version)) {
3703 ret = JNI_OK;
3704 }
3705 // 1.1 style no longer supported in hotspot.
3706 // According the JNI spec, we should update args->version on return.
3707 // We also use the structure to communicate with launcher about default
3708 // stack size.
3709 if (args->version == JNI_VERSION_1_1) {
3710 args->version = JNI_VERSION_1_2;
3711 // javaStackSize is int in arguments structure
3712 assert(jlong(ThreadStackSize) * K < INT_MAX, "integer overflow");
3713 args->javaStackSize = (jint)(ThreadStackSize * K);
3714 }
3715 return ret;
3716 }
3717
3718 DT_RETURN_MARK_DECL(CreateJavaVM, jint
3719 , HOTSPOT_JNI_CREATEJAVAVM_RETURN(_ret_ref));
3720
3721 static jint JNI_CreateJavaVM_inner(JavaVM **vm, void **penv, void *args) {
3722 HOTSPOT_JNI_CREATEJAVAVM_ENTRY((void **) vm, penv, args);
3723
3724 jint result = JNI_ERR;
3725 DT_RETURN_MARK(CreateJavaVM, jint, (const jint&)result);
3726
3727 // We're about to use Atomic::xchg for synchronization. Some Zero
3728 // platforms use the GCC builtin __sync_lock_test_and_set for this,
3729 // but __sync_lock_test_and_set is not guaranteed to do what we want
3730 // on all architectures. So we check it works before relying on it.
3731 #if defined(ZERO) && defined(ASSERT)
3732 {
3733 jint a = 0xcafebabe;
3734 jint b = Atomic::xchg(&a, (jint) 0xdeadbeef);
3735 void *c = &a;
3736 void *d = Atomic::xchg(&c, &b);
3737 assert(a == (jint) 0xdeadbeef && b == (jint) 0xcafebabe, "Atomic::xchg() works");
3738 assert(c == &b && d == &a, "Atomic::xchg() works");
3739 }
3740 #endif // ZERO && ASSERT
3741
3742 // At the moment it's only possible to have one Java VM,
3743 // since some of the runtime state is in global variables.
3744
3745 // We cannot use our mutex locks here, since they only work on
3746 // Threads. We do an atomic compare and exchange to ensure only
3747 // one thread can call this method at a time
3748
3749 // We use Atomic::xchg rather than Atomic::add/dec since on some platforms
3750 // the add/dec implementations are dependent on whether we are running
3751 // on a multiprocessor Atomic::xchg does not have this problem.
3752 if (Atomic::xchg(&vm_created, 1) == 1) {
3753 return JNI_EEXIST; // already created, or create attempt in progress
3754 }
3755
3756 // If a previous creation attempt failed but can be retried safely,
3757 // then safe_to_recreate_vm will have been reset to 1 after being
3758 // cleared here. If a previous creation attempt succeeded and we then
3759 // destroyed that VM, we will be prevented from trying to recreate
3760 // the VM in the same process, as the value will still be 0.
3761 if (Atomic::xchg(&safe_to_recreate_vm, 0) == 0) {
3762 return JNI_ERR;
3763 }
3764
3765 assert(vm_created == 1, "vm_created is true during the creation");
3766
3767 /**
3768 * Certain errors during initialization are recoverable and do not
3769 * prevent this method from being called again at a later time
3770 * (perhaps with different arguments). However, at a certain
3771 * point during initialization if an error occurs we cannot allow
3772 * this function to be called again (or it will crash). In those
3773 * situations, the 'canTryAgain' flag is set to false, which atomically
3774 * sets safe_to_recreate_vm to 1, such that any new call to
3775 * JNI_CreateJavaVM will immediately fail using the above logic.
3776 */
3777 bool can_try_again = true;
3778
3779 result = Threads::create_vm((JavaVMInitArgs*) args, &can_try_again);
3780 if (result == JNI_OK) {
3781 JavaThread *thread = JavaThread::current();
3782 assert(!thread->has_pending_exception(), "should have returned not OK");
3783 /* thread is thread_in_vm here */
3784 *vm = (JavaVM *)(&main_vm);
3785 *(JNIEnv**)penv = thread->jni_environment();
3786
3787 #if INCLUDE_JVMCI
3788 if (EnableJVMCI) {
3789 if (UseJVMCICompiler) {
3790 // JVMCI is initialized on a CompilerThread
3791 if (BootstrapJVMCI) {
3792 JavaThread* THREAD = thread;
3793 JVMCICompiler* compiler = JVMCICompiler::instance(true, CATCH);
3794 compiler->bootstrap(THREAD);
3795 if (HAS_PENDING_EXCEPTION) {
3796 HandleMark hm;
3797 vm_exit_during_initialization(Handle(THREAD, PENDING_EXCEPTION));
3798 }
3799 }
3800 }
3801 }
3802 #endif
3803
3804 // Notify JVMTI
3805 if (JvmtiExport::should_post_thread_life()) {
3806 JvmtiExport::post_thread_start(thread);
3807 }
3808
3809 post_thread_start_event(thread);
3810
3811 #ifndef PRODUCT
3812 if (ReplayCompiles) ciReplay::replay(thread);
3813
3814 // Some platforms (like Win*) need a wrapper around these test
3815 // functions in order to properly handle error conditions.
3816 VMError::test_error_handler();
3817 #endif
3818
3819 // Since this is not a JVM_ENTRY we have to set the thread state manually before leaving.
3820 ThreadStateTransition::transition(thread, _thread_in_vm, _thread_in_native);
3821 } else {
3822 // If create_vm exits because of a pending exception, exit with that
3823 // exception. In the future when we figure out how to reclaim memory,
3824 // we may be able to exit with JNI_ERR and allow the calling application
3825 // to continue.
3826 if (Universe::is_fully_initialized()) {
3827 // otherwise no pending exception possible - VM will already have aborted
3828 JavaThread* THREAD = JavaThread::current();
3829 if (HAS_PENDING_EXCEPTION) {
3830 HandleMark hm;
3831 vm_exit_during_initialization(Handle(THREAD, PENDING_EXCEPTION));
3832 }
3833 }
3834
3835 if (can_try_again) {
3836 // reset safe_to_recreate_vm to 1 so that retrial would be possible
3837 safe_to_recreate_vm = 1;
3838 }
3839
3840 // Creation failed. We must reset vm_created
3841 *vm = 0;
3842 *(JNIEnv**)penv = 0;
3843 // reset vm_created last to avoid race condition. Use OrderAccess to
3844 // control both compiler and architectural-based reordering.
3845 Atomic::release_store(&vm_created, 0);
3846 }
3847
3848 // Flush stdout and stderr before exit.
3849 fflush(stdout);
3850 fflush(stderr);
3851
3852 return result;
3853
3854 }
3855
3856 _JNI_IMPORT_OR_EXPORT_ jint JNICALL JNI_CreateJavaVM(JavaVM **vm, void **penv, void *args) {
3857 jint result = JNI_ERR;
3858 // On Windows, let CreateJavaVM run with SEH protection
3859 #ifdef _WIN32
3860 __try {
3861 #endif
3862 result = JNI_CreateJavaVM_inner(vm, penv, args);
3863 #ifdef _WIN32
3864 } __except(topLevelExceptionFilter((_EXCEPTION_POINTERS*)_exception_info())) {
3865 // Nothing to do.
3866 }
3867 #endif
3868 return result;
3869 }
3870
3871 _JNI_IMPORT_OR_EXPORT_ jint JNICALL JNI_GetCreatedJavaVMs(JavaVM **vm_buf, jsize bufLen, jsize *numVMs) {
3872 // See bug 4367188, the wrapper can sometimes cause VM crashes
3873 // JNIWrapper("GetCreatedJavaVMs");
3874
3875 HOTSPOT_JNI_GETCREATEDJAVAVMS_ENTRY((void **) vm_buf, bufLen, (uintptr_t *) numVMs);
3876
3877 if (vm_created == 1) {
3878 if (numVMs != NULL) *numVMs = 1;
3879 if (bufLen > 0) *vm_buf = (JavaVM *)(&main_vm);
3880 } else {
3881 if (numVMs != NULL) *numVMs = 0;
3882 }
3883 HOTSPOT_JNI_GETCREATEDJAVAVMS_RETURN(JNI_OK);
3884 return JNI_OK;
3885 }
3886
3887 extern "C" {
3888
3889 DT_RETURN_MARK_DECL(DestroyJavaVM, jint
3890 , HOTSPOT_JNI_DESTROYJAVAVM_RETURN(_ret_ref));
3891
3892 static jint JNICALL jni_DestroyJavaVM_inner(JavaVM *vm) {
3893 HOTSPOT_JNI_DESTROYJAVAVM_ENTRY(vm);
3894 jint res = JNI_ERR;
3895 DT_RETURN_MARK(DestroyJavaVM, jint, (const jint&)res);
3896
3897 if (vm_created == 0) {
3898 res = JNI_ERR;
3899 return res;
3900 }
3901
3902 JNIWrapper("DestroyJavaVM");
3903 JNIEnv *env;
3904 JavaVMAttachArgs destroyargs;
3905 destroyargs.version = CurrentVersion;
3906 destroyargs.name = (char *)"DestroyJavaVM";
3907 destroyargs.group = NULL;
3908 res = vm->AttachCurrentThread((void **)&env, (void *)&destroyargs);
3909 if (res != JNI_OK) {
3910 return res;
3911 }
3912
3913 // Since this is not a JVM_ENTRY we have to set the thread state manually before entering.
3914 JavaThread* thread = JavaThread::current();
3915 ThreadStateTransition::transition_from_native(thread, _thread_in_vm);
3916 if (Threads::destroy_vm()) {
3917 // Should not change thread state, VM is gone
3918 vm_created = 0;
3919 res = JNI_OK;
3920 return res;
3921 } else {
3922 ThreadStateTransition::transition(thread, _thread_in_vm, _thread_in_native);
3923 res = JNI_ERR;
3924 return res;
3925 }
3926 }
3927
3928 jint JNICALL jni_DestroyJavaVM(JavaVM *vm) {
3929 jint result = JNI_ERR;
3930 // On Windows, we need SEH protection
3931 #ifdef _WIN32
3932 __try {
3933 #endif
3934 result = jni_DestroyJavaVM_inner(vm);
3935 #ifdef _WIN32
3936 } __except(topLevelExceptionFilter((_EXCEPTION_POINTERS*)_exception_info())) {
3937 // Nothing to do.
3938 }
3939 #endif
3940 return result;
3941 }
3942
3943 static jint attach_current_thread(JavaVM *vm, void **penv, void *_args, bool daemon) {
3944 JavaVMAttachArgs *args = (JavaVMAttachArgs *) _args;
3945
3946 // Check below commented out from JDK1.2fcs as well
3947 /*
3948 if (args && (args->version != JNI_VERSION_1_1 || args->version != JNI_VERSION_1_2)) {
3949 return JNI_EVERSION;
3950 }
3951 */
3952
3953 Thread* t = Thread::current_or_null();
3954 if (t != NULL) {
3955 // If executing from an atexit hook we may be in the VMThread.
3956 if (t->is_Java_thread()) {
3957 // If the thread has been attached this operation is a no-op
3958 *(JNIEnv**)penv = ((JavaThread*) t)->jni_environment();
3959 return JNI_OK;
3960 } else {
3961 return JNI_ERR;
3962 }
3963 }
3964
3965 // Create a thread and mark it as attaching so it will be skipped by the
3966 // ThreadsListEnumerator - see CR 6404306
3967 JavaThread* thread = new JavaThread(true);
3968
3969 // Set correct safepoint info. The thread is going to call into Java when
3970 // initializing the Java level thread object. Hence, the correct state must
3971 // be set in order for the Safepoint code to deal with it correctly.
3972 thread->set_thread_state(_thread_in_vm);
3973 thread->record_stack_base_and_size();
3974 thread->register_thread_stack_with_NMT();
3975 thread->initialize_thread_current();
3976
3977 if (!os::create_attached_thread(thread)) {
3978 thread->smr_delete();
3979 return JNI_ERR;
3980 }
3981 // Enable stack overflow checks
3982 thread->create_stack_guard_pages();
3983
3984 thread->initialize_tlab();
3985
3986 thread->cache_global_variables();
3987
3988 // This thread will not do a safepoint check, since it has
3989 // not been added to the Thread list yet.
3990 { MutexLocker ml(Threads_lock);
3991 // This must be inside this lock in order to get FullGCALot to work properly, i.e., to
3992 // avoid this thread trying to do a GC before it is added to the thread-list
3993 thread->set_active_handles(JNIHandleBlock::allocate_block());
3994 Threads::add(thread, daemon);
3995 }
3996 // Create thread group and name info from attach arguments
3997 oop group = NULL;
3998 char* thread_name = NULL;
3999 if (args != NULL && Threads::is_supported_jni_version(args->version)) {
4000 group = JNIHandles::resolve(args->group);
4001 thread_name = args->name; // may be NULL
4002 }
4003 if (group == NULL) group = Universe::main_thread_group();
4004
4005 // Create Java level thread object and attach it to this thread
4006 bool attach_failed = false;
4007 {
4008 EXCEPTION_MARK;
4009 HandleMark hm(THREAD);
4010 Handle thread_group(THREAD, group);
4011 thread->allocate_threadObj(thread_group, thread_name, daemon, THREAD);
4012 if (HAS_PENDING_EXCEPTION) {
4013 CLEAR_PENDING_EXCEPTION;
4014 // cleanup outside the handle mark.
4015 attach_failed = true;
4016 }
4017 }
4018
4019 if (attach_failed) {
4020 // Added missing cleanup
4021 thread->cleanup_failed_attach_current_thread(daemon);
4022 return JNI_ERR;
4023 }
4024
4025 // mark the thread as no longer attaching
4026 // this uses a fence to push the change through so we don't have
4027 // to regrab the threads_lock
4028 thread->set_done_attaching_via_jni();
4029
4030 // Set java thread status.
4031 java_lang_Thread::set_thread_status(thread->threadObj(),
4032 java_lang_Thread::RUNNABLE);
4033
4034 // Notify the debugger
4035 if (JvmtiExport::should_post_thread_life()) {
4036 JvmtiExport::post_thread_start(thread);
4037 }
4038
4039 post_thread_start_event(thread);
4040
4041 *(JNIEnv**)penv = thread->jni_environment();
4042
4043 // Now leaving the VM, so change thread_state. This is normally automatically taken care
4044 // of in the JVM_ENTRY. But in this situation we have to do it manually. Notice, that by
4045 // using ThreadStateTransition::transition, we do a callback to the safepoint code if
4046 // needed.
4047
4048 ThreadStateTransition::transition(thread, _thread_in_vm, _thread_in_native);
4049
4050 // Perform any platform dependent FPU setup
4051 os::setup_fpu();
4052
4053 return JNI_OK;
4054 }
4055
4056
4057 jint JNICALL jni_AttachCurrentThread(JavaVM *vm, void **penv, void *_args) {
4058 HOTSPOT_JNI_ATTACHCURRENTTHREAD_ENTRY(vm, penv, _args);
4059 if (vm_created == 0) {
4060 HOTSPOT_JNI_ATTACHCURRENTTHREAD_RETURN((uint32_t) JNI_ERR);
4061 return JNI_ERR;
4062 }
4063
4064 JNIWrapper("AttachCurrentThread");
4065 jint ret = attach_current_thread(vm, penv, _args, false);
4066 HOTSPOT_JNI_ATTACHCURRENTTHREAD_RETURN(ret);
4067 return ret;
4068 }
4069
4070
4071 jint JNICALL jni_DetachCurrentThread(JavaVM *vm) {
4072 HOTSPOT_JNI_DETACHCURRENTTHREAD_ENTRY(vm);
4073 if (vm_created == 0) {
4074 HOTSPOT_JNI_DETACHCURRENTTHREAD_RETURN(JNI_ERR);
4075 return JNI_ERR;
4076 }
4077
4078 JNIWrapper("DetachCurrentThread");
4079
4080 Thread* current = Thread::current_or_null();
4081
4082 // If the thread has already been detached the operation is a no-op
4083 if (current == NULL) {
4084 HOTSPOT_JNI_DETACHCURRENTTHREAD_RETURN(JNI_OK);
4085 return JNI_OK;
4086 }
4087
4088 // If executing from an atexit hook we may be in the VMThread.
4089 if (!current->is_Java_thread()) {
4090 HOTSPOT_JNI_DETACHCURRENTTHREAD_RETURN((uint32_t) JNI_ERR);
4091 return JNI_ERR;
4092 }
4093
4094 VM_Exit::block_if_vm_exited();
4095
4096 JavaThread* thread = (JavaThread*) current;
4097 if (thread->has_last_Java_frame()) {
4098 HOTSPOT_JNI_DETACHCURRENTTHREAD_RETURN((uint32_t) JNI_ERR);
4099 // Can't detach a thread that's running java, that can't work.
4100 return JNI_ERR;
4101 }
4102
4103 // Safepoint support. Have to do call-back to safepoint code, if in the
4104 // middle of a safepoint operation
4105 ThreadStateTransition::transition_from_native(thread, _thread_in_vm);
4106
4107 // XXX: Note that JavaThread::exit() call below removes the guards on the
4108 // stack pages set up via enable_stack_{red,yellow}_zone() calls
4109 // above in jni_AttachCurrentThread. Unfortunately, while the setting
4110 // of the guards is visible in jni_AttachCurrentThread above,
4111 // the removal of the guards is buried below in JavaThread::exit()
4112 // here. The abstraction should be more symmetrically either exposed
4113 // or hidden (e.g. it could probably be hidden in the same
4114 // (platform-dependent) methods where we do alternate stack
4115 // maintenance work?)
4116 thread->exit(false, JavaThread::jni_detach);
4117 thread->smr_delete();
4118
4119 HOTSPOT_JNI_DETACHCURRENTTHREAD_RETURN(JNI_OK);
4120 return JNI_OK;
4121 }
4122
4123 DT_RETURN_MARK_DECL(GetEnv, jint
4124 , HOTSPOT_JNI_GETENV_RETURN(_ret_ref));
4125
4126 jint JNICALL jni_GetEnv(JavaVM *vm, void **penv, jint version) {
4127 HOTSPOT_JNI_GETENV_ENTRY(vm, penv, version);
4128 jint ret = JNI_ERR;
4129 DT_RETURN_MARK(GetEnv, jint, (const jint&)ret);
4130
4131 if (vm_created == 0) {
4132 *penv = NULL;
4133 ret = JNI_EDETACHED;
4134 return ret;
4135 }
4136
4137 if (JniExportedInterface::GetExportedInterface(vm, penv, version, &ret)) {
4138 return ret;
4139 }
4140
4141 #ifndef JVMPI_VERSION_1
4142 // need these in order to be polite about older agents
4143 #define JVMPI_VERSION_1 ((jint)0x10000001)
4144 #define JVMPI_VERSION_1_1 ((jint)0x10000002)
4145 #define JVMPI_VERSION_1_2 ((jint)0x10000003)
4146 #endif // !JVMPI_VERSION_1
4147
4148 Thread* thread = Thread::current_or_null();
4149 if (thread != NULL && thread->is_Java_thread()) {
4150 if (Threads::is_supported_jni_version_including_1_1(version)) {
4151 *(JNIEnv**)penv = ((JavaThread*) thread)->jni_environment();
4152 ret = JNI_OK;
4153 return ret;
4154
4155 } else if (version == JVMPI_VERSION_1 ||
4156 version == JVMPI_VERSION_1_1 ||
4157 version == JVMPI_VERSION_1_2) {
4158 tty->print_cr("ERROR: JVMPI, an experimental interface, is no longer supported.");
4159 tty->print_cr("Please use the supported interface: the JVM Tool Interface (JVM TI).");
4160 ret = JNI_EVERSION;
4161 return ret;
4162 } else if (JvmtiExport::is_jvmdi_version(version)) {
4163 tty->print_cr("FATAL ERROR: JVMDI is no longer supported.");
4164 tty->print_cr("Please use the supported interface: the JVM Tool Interface (JVM TI).");
4165 ret = JNI_EVERSION;
4166 return ret;
4167 } else {
4168 *penv = NULL;
4169 ret = JNI_EVERSION;
4170 return ret;
4171 }
4172 } else {
4173 *penv = NULL;
4174 ret = JNI_EDETACHED;
4175 return ret;
4176 }
4177 }
4178
4179
4180 jint JNICALL jni_AttachCurrentThreadAsDaemon(JavaVM *vm, void **penv, void *_args) {
4181 HOTSPOT_JNI_ATTACHCURRENTTHREADASDAEMON_ENTRY(vm, penv, _args);
4182 if (vm_created == 0) {
4183 HOTSPOT_JNI_ATTACHCURRENTTHREADASDAEMON_RETURN((uint32_t) JNI_ERR);
4184 return JNI_ERR;
4185 }
4186
4187 JNIWrapper("AttachCurrentThreadAsDaemon");
4188 jint ret = attach_current_thread(vm, penv, _args, true);
4189 HOTSPOT_JNI_ATTACHCURRENTTHREADASDAEMON_RETURN(ret);
4190 return ret;
4191 }
4192
4193
4194 } // End extern "C"
4195
4196 const struct JNIInvokeInterface_ jni_InvokeInterface = {
4197 NULL,
4198 NULL,
4199 NULL,
4200
4201 jni_DestroyJavaVM,
4202 jni_AttachCurrentThread,
4203 jni_DetachCurrentThread,
4204 jni_GetEnv,
4205 jni_AttachCurrentThreadAsDaemon
4206 };