1 /*
2 * Copyright (c) 1997, 2020, Oracle and/or its affiliates. All rights reserved.
3 * Copyright (c) 2012 Red Hat, Inc.
4 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
5 *
6 * This code is free software; you can redistribute it and/or modify it
7 * under the terms of the GNU General Public License version 2 only, as
8 * published by the Free Software Foundation.
9 *
10 * This code is distributed in the hope that it will be useful, but WITHOUT
11 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
12 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
13 * version 2 for more details (a copy is included in the LICENSE file that
14 * accompanied this code).
15 *
16 * You should have received a copy of the GNU General Public License version
17 * 2 along with this work; if not, write to the Free Software Foundation,
18 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
19 *
20 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
21 * or visit www.oracle.com if you need additional information or have any
22 * questions.
23 *
24 */
25
26 #include "precompiled.hpp"
27 #include "jni.h"
28 #include "jvm.h"
29 #include "ci/ciReplay.hpp"
30 #include "classfile/altHashing.hpp"
31 #include "classfile/classFileStream.hpp"
32 #include "classfile/classLoader.hpp"
33 #include "classfile/javaClasses.hpp"
34 #include "classfile/javaClasses.inline.hpp"
35 #include "classfile/moduleEntry.hpp"
36 #include "classfile/modules.hpp"
37 #include "classfile/symbolTable.hpp"
38 #include "classfile/systemDictionary.hpp"
39 #include "classfile/vmSymbols.hpp"
40 #include "gc/shared/gcLocker.inline.hpp"
41 #include "interpreter/linkResolver.hpp"
42 #include "jfr/jfrEvents.hpp"
43 #include "jfr/support/jfrThreadId.hpp"
44 #include "logging/log.hpp"
45 #include "memory/allocation.hpp"
46 #include "memory/allocation.inline.hpp"
47 #include "memory/oopFactory.hpp"
48 #include "memory/resourceArea.hpp"
49 #include "memory/universe.hpp"
50 #include "oops/access.inline.hpp"
51 #include "oops/arrayOop.inline.hpp"
52 #include "oops/instanceKlass.hpp"
53 #include "oops/instanceOop.hpp"
54 #include "oops/markWord.hpp"
55 #include "oops/method.hpp"
56 #include "oops/objArrayKlass.hpp"
57 #include "oops/objArrayOop.inline.hpp"
58 #include "oops/oop.inline.hpp"
59 #include "oops/symbol.hpp"
60 #include "oops/typeArrayKlass.hpp"
61 #include "oops/typeArrayOop.inline.hpp"
62 #include "prims/jniCheck.hpp"
63 #include "prims/jniExport.hpp"
64 #include "prims/jniFastGetField.hpp"
65 #include "prims/jvm_misc.hpp"
66 #include "prims/jvmtiExport.hpp"
67 #include "prims/jvmtiThreadState.hpp"
68 #include "runtime/atomic.hpp"
69 #include "runtime/fieldDescriptor.inline.hpp"
70 #include "runtime/handles.inline.hpp"
71 #include "runtime/interfaceSupport.inline.hpp"
72 #include "runtime/java.hpp"
73 #include "runtime/javaCalls.hpp"
74 #include "runtime/jfieldIDWorkaround.hpp"
75 #include "runtime/jniHandles.inline.hpp"
76 #include "runtime/reflection.hpp"
77 #include "runtime/safepointVerifiers.hpp"
78 #include "runtime/sharedRuntime.hpp"
79 #include "runtime/signature.hpp"
80 #include "runtime/thread.inline.hpp"
81 #include "runtime/vmOperations.hpp"
82 #include "services/memTracker.hpp"
83 #include "services/runtimeService.hpp"
84 #include "utilities/defaultStream.hpp"
85 #include "utilities/dtrace.hpp"
86 #include "utilities/events.hpp"
87 #include "utilities/histogram.hpp"
88 #include "utilities/macros.hpp"
89 #include "utilities/vmError.hpp"
90 #if INCLUDE_JVMCI
91 #include "jvmci/jvmciCompiler.hpp"
92 #endif
93
94 static jint CurrentVersion = JNI_VERSION_10;
95
96 #ifdef _WIN32
97 extern LONG WINAPI topLevelExceptionFilter(_EXCEPTION_POINTERS* );
98 #endif
99
100 // The DT_RETURN_MARK macros create a scoped object to fire the dtrace
101 // '-return' probe regardless of the return path is taken out of the function.
102 // Methods that have multiple return paths use this to avoid having to
103 // instrument each return path. Methods that use CHECK or THROW must use this
104 // since those macros can cause an immedate uninstrumented return.
105 //
106 // In order to get the return value, a reference to the variable containing
107 // the return value must be passed to the contructor of the object, and
108 // the return value must be set before return (since the mark object has
109 // a reference to it).
110 //
111 // Example:
112 // DT_RETURN_MARK_DECL(SomeFunc, int);
113 // JNI_ENTRY(int, SomeFunc, ...)
114 // int return_value = 0;
115 // DT_RETURN_MARK(SomeFunc, int, (const int&)return_value);
116 // foo(CHECK_0)
117 // return_value = 5;
118 // return return_value;
119 // JNI_END
120 #define DT_RETURN_MARK_DECL(name, type, probe) \
121 DTRACE_ONLY( \
122 class DTraceReturnProbeMark_##name { \
123 public: \
124 const type& _ret_ref; \
125 DTraceReturnProbeMark_##name(const type& v) : _ret_ref(v) {} \
126 ~DTraceReturnProbeMark_##name() { \
127 probe; \
128 } \
129 } \
130 )
131 // Void functions are simpler since there's no return value
132 #define DT_VOID_RETURN_MARK_DECL(name, probe) \
133 DTRACE_ONLY( \
134 class DTraceReturnProbeMark_##name { \
135 public: \
136 ~DTraceReturnProbeMark_##name() { \
137 probe; \
138 } \
139 } \
140 )
141
142 // Place these macros in the function to mark the return. Non-void
143 // functions need the type and address of the return value.
144 #define DT_RETURN_MARK(name, type, ref) \
145 DTRACE_ONLY( DTraceReturnProbeMark_##name dtrace_return_mark(ref) )
146 #define DT_VOID_RETURN_MARK(name) \
147 DTRACE_ONLY( DTraceReturnProbeMark_##name dtrace_return_mark )
148
149
150 // Use these to select distinct code for floating-point vs. non-floating point
151 // situations. Used from within common macros where we need slightly
152 // different behavior for Float/Double
153 #define FP_SELECT_Boolean(intcode, fpcode) intcode
154 #define FP_SELECT_Byte(intcode, fpcode) intcode
155 #define FP_SELECT_Char(intcode, fpcode) intcode
156 #define FP_SELECT_Short(intcode, fpcode) intcode
157 #define FP_SELECT_Object(intcode, fpcode) intcode
158 #define FP_SELECT_Int(intcode, fpcode) intcode
159 #define FP_SELECT_Long(intcode, fpcode) intcode
160 #define FP_SELECT_Float(intcode, fpcode) fpcode
161 #define FP_SELECT_Double(intcode, fpcode) fpcode
162 #define FP_SELECT(TypeName, intcode, fpcode) \
163 FP_SELECT_##TypeName(intcode, fpcode)
164
165 // Choose DT_RETURN_MARK macros based on the type: float/double -> void
166 // (dtrace doesn't do FP yet)
167 #define DT_RETURN_MARK_DECL_FOR(TypeName, name, type, probe) \
168 FP_SELECT(TypeName, \
169 DT_RETURN_MARK_DECL(name, type, probe), DT_VOID_RETURN_MARK_DECL(name, probe) )
170 #define DT_RETURN_MARK_FOR(TypeName, name, type, ref) \
171 FP_SELECT(TypeName, \
172 DT_RETURN_MARK(name, type, ref), DT_VOID_RETURN_MARK(name) )
173
174
175 // out-of-line helpers for class jfieldIDWorkaround:
176
177 bool jfieldIDWorkaround::is_valid_jfieldID(Klass* k, jfieldID id) {
178 if (jfieldIDWorkaround::is_instance_jfieldID(k, id)) {
179 uintptr_t as_uint = (uintptr_t) id;
180 intptr_t offset = raw_instance_offset(id);
181 if (is_checked_jfieldID(id)) {
182 if (!klass_hash_ok(k, id)) {
183 return false;
184 }
185 }
186 return InstanceKlass::cast(k)->contains_field_offset(offset);
187 } else {
188 JNIid* result = (JNIid*) id;
189 #ifdef ASSERT
190 return result != NULL && result->is_static_field_id();
191 #else
192 return result != NULL;
193 #endif
194 }
195 }
196
197
198 intptr_t jfieldIDWorkaround::encode_klass_hash(Klass* k, intptr_t offset) {
199 if (offset <= small_offset_mask) {
200 Klass* field_klass = k;
201 Klass* super_klass = field_klass->super();
202 // With compressed oops the most super class with nonstatic fields would
203 // be the owner of fields embedded in the header.
204 while (InstanceKlass::cast(super_klass)->has_nonstatic_fields() &&
205 InstanceKlass::cast(super_klass)->contains_field_offset(offset)) {
206 field_klass = super_klass; // super contains the field also
207 super_klass = field_klass->super();
208 }
209 debug_only(NoSafepointVerifier nosafepoint;)
210 uintptr_t klass_hash = field_klass->identity_hash();
211 return ((klass_hash & klass_mask) << klass_shift) | checked_mask_in_place;
212 } else {
213 #if 0
214 #ifndef PRODUCT
215 {
216 ResourceMark rm;
217 warning("VerifyJNIFields: long offset %d in %s", offset, k->external_name());
218 }
219 #endif
220 #endif
221 return 0;
222 }
223 }
224
225 bool jfieldIDWorkaround::klass_hash_ok(Klass* k, jfieldID id) {
226 uintptr_t as_uint = (uintptr_t) id;
227 intptr_t klass_hash = (as_uint >> klass_shift) & klass_mask;
228 do {
229 debug_only(NoSafepointVerifier nosafepoint;)
230 // Could use a non-blocking query for identity_hash here...
231 if ((k->identity_hash() & klass_mask) == klass_hash)
232 return true;
233 k = k->super();
234 } while (k != NULL);
235 return false;
236 }
237
238 void jfieldIDWorkaround::verify_instance_jfieldID(Klass* k, jfieldID id) {
239 guarantee(jfieldIDWorkaround::is_instance_jfieldID(k, id), "must be an instance field" );
240 uintptr_t as_uint = (uintptr_t) id;
241 intptr_t offset = raw_instance_offset(id);
242 if (VerifyJNIFields) {
243 if (is_checked_jfieldID(id)) {
244 guarantee(klass_hash_ok(k, id),
245 "Bug in native code: jfieldID class must match object");
246 } else {
247 #if 0
248 #ifndef PRODUCT
249 if (Verbose) {
250 ResourceMark rm;
251 warning("VerifyJNIFields: unverified offset %d for %s", offset, k->external_name());
252 }
253 #endif
254 #endif
255 }
256 }
257 guarantee(InstanceKlass::cast(k)->contains_field_offset(offset),
258 "Bug in native code: jfieldID offset must address interior of object");
259 }
260
261 // Wrapper to trace JNI functions
262
263 #ifdef ASSERT
264 Histogram* JNIHistogram;
265 static volatile int JNIHistogram_lock = 0;
266
267 class JNIHistogramElement : public HistogramElement {
268 public:
269 JNIHistogramElement(const char* name);
270 };
271
272 JNIHistogramElement::JNIHistogramElement(const char* elementName) {
273 _name = elementName;
274 uintx count = 0;
275
276 while (Atomic::cmpxchg(&JNIHistogram_lock, 0, 1) != 0) {
277 while (Atomic::load_acquire(&JNIHistogram_lock) != 0) {
278 count +=1;
279 if ( (WarnOnStalledSpinLock > 0)
280 && (count % WarnOnStalledSpinLock == 0)) {
281 warning("JNIHistogram_lock seems to be stalled");
282 }
283 }
284 }
285
286
287 if(JNIHistogram == NULL)
288 JNIHistogram = new Histogram("JNI Call Counts",100);
289
290 JNIHistogram->add_element(this);
291 Atomic::dec(&JNIHistogram_lock);
292 }
293
294 #define JNICountWrapper(arg) \
295 static JNIHistogramElement* e = new JNIHistogramElement(arg); \
296 /* There is a MT-race condition in VC++. So we need to make sure that that e has been initialized */ \
297 if (e != NULL) e->increment_count()
298 #define JNIWrapper(arg) JNICountWrapper(arg);
299 #else
300 #define JNIWrapper(arg)
301 #endif
302
303
304 // Implementation of JNI entries
305
306 DT_RETURN_MARK_DECL(DefineClass, jclass
307 , HOTSPOT_JNI_DEFINECLASS_RETURN(_ret_ref));
308
309 JNI_ENTRY(jclass, jni_DefineClass(JNIEnv *env, const char *name, jobject loaderRef,
310 const jbyte *buf, jsize bufLen))
311 JNIWrapper("DefineClass");
312
313 HOTSPOT_JNI_DEFINECLASS_ENTRY(
314 env, (char*) name, loaderRef, (char*) buf, bufLen);
315
316 jclass cls = NULL;
317 DT_RETURN_MARK(DefineClass, jclass, (const jclass&)cls);
318
319 TempNewSymbol class_name = NULL;
320 // Since exceptions can be thrown, class initialization can take place
321 // if name is NULL no check for class name in .class stream has to be made.
322 if (name != NULL) {
323 const int str_len = (int)strlen(name);
324 if (str_len > Symbol::max_length()) {
325 // It's impossible to create this class; the name cannot fit
326 // into the constant pool.
327 Exceptions::fthrow(THREAD_AND_LOCATION,
328 vmSymbols::java_lang_NoClassDefFoundError(),
329 "Class name exceeds maximum length of %d: %s",
330 Symbol::max_length(),
331 name);
332 return 0;
333 }
334 class_name = SymbolTable::new_symbol(name);
335 }
336 ResourceMark rm(THREAD);
337 ClassFileStream st((u1*)buf, bufLen, NULL, ClassFileStream::verify);
338 Handle class_loader (THREAD, JNIHandles::resolve(loaderRef));
339
340 if (UsePerfData && !class_loader.is_null()) {
341 // check whether the current caller thread holds the lock or not.
342 // If not, increment the corresponding counter
343 if (ObjectSynchronizer::
344 query_lock_ownership((JavaThread*)THREAD, class_loader) !=
345 ObjectSynchronizer::owner_self) {
346 ClassLoader::sync_JNIDefineClassLockFreeCounter()->inc();
347 }
348 }
349 Klass* k = SystemDictionary::resolve_from_stream(class_name,
350 class_loader,
351 Handle(),
352 &st,
353 CHECK_NULL);
354
355 if (log_is_enabled(Debug, class, resolve) && k != NULL) {
356 trace_class_resolution(k);
357 }
358
359 cls = (jclass)JNIHandles::make_local(
360 env, k->java_mirror());
361 return cls;
362 JNI_END
363
364
365
366 DT_RETURN_MARK_DECL(FindClass, jclass
367 , HOTSPOT_JNI_FINDCLASS_RETURN(_ret_ref));
368
369 JNI_ENTRY(jclass, jni_FindClass(JNIEnv *env, const char *name))
370 JNIWrapper("FindClass");
371
372 HOTSPOT_JNI_FINDCLASS_ENTRY(env, (char *)name);
373
374 jclass result = NULL;
375 DT_RETURN_MARK(FindClass, jclass, (const jclass&)result);
376
377 // Sanity check the name: it cannot be null or larger than the maximum size
378 // name we can fit in the constant pool.
379 if (name == NULL) {
380 THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), "No class name given");
381 }
382 if ((int)strlen(name) > Symbol::max_length()) {
383 Exceptions::fthrow(THREAD_AND_LOCATION,
384 vmSymbols::java_lang_NoClassDefFoundError(),
385 "Class name exceeds maximum length of %d: %s",
386 Symbol::max_length(),
387 name);
388 return 0;
389 }
390
391 //%note jni_3
392 Handle protection_domain;
393 // Find calling class
394 Klass* k = thread->security_get_caller_class(0);
395 // default to the system loader when no context
396 Handle loader(THREAD, SystemDictionary::java_system_loader());
397 if (k != NULL) {
398 // Special handling to make sure JNI_OnLoad and JNI_OnUnload are executed
399 // in the correct class context.
400 if (k->class_loader() == NULL &&
401 k->name() == vmSymbols::jdk_internal_loader_NativeLibraries()) {
402 JavaValue result(T_OBJECT);
403 JavaCalls::call_static(&result, k,
404 vmSymbols::getFromClass_name(),
405 vmSymbols::void_class_signature(),
406 CHECK_NULL);
407 // When invoked from JNI_OnLoad, NativeLibraries::getFromClass returns
408 // a non-NULL Class object. When invoked from JNI_OnUnload,
409 // it will return NULL to indicate no context.
410 oop mirror = (oop) result.get_jobject();
411 if (mirror != NULL) {
412 Klass* fromClass = java_lang_Class::as_Klass(mirror);
413 loader = Handle(THREAD, fromClass->class_loader());
414 protection_domain = Handle(THREAD, fromClass->protection_domain());
415 }
416 } else {
417 loader = Handle(THREAD, k->class_loader());
418 }
419 }
420
421 TempNewSymbol sym = SymbolTable::new_symbol(name);
422 result = find_class_from_class_loader(env, sym, true, loader,
423 protection_domain, true, thread);
424
425 if (log_is_enabled(Debug, class, resolve) && result != NULL) {
426 trace_class_resolution(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(result)));
427 }
428
429 return result;
430 JNI_END
431
432 DT_RETURN_MARK_DECL(FromReflectedMethod, jmethodID
433 , HOTSPOT_JNI_FROMREFLECTEDMETHOD_RETURN((uintptr_t)_ret_ref));
434
435 JNI_ENTRY(jmethodID, jni_FromReflectedMethod(JNIEnv *env, jobject method))
436 JNIWrapper("FromReflectedMethod");
437
438 HOTSPOT_JNI_FROMREFLECTEDMETHOD_ENTRY(env, method);
439
440 jmethodID ret = NULL;
441 DT_RETURN_MARK(FromReflectedMethod, jmethodID, (const jmethodID&)ret);
442
443 // method is a handle to a java.lang.reflect.Method object
444 oop reflected = JNIHandles::resolve_non_null(method);
445 oop mirror = NULL;
446 int slot = 0;
447
448 if (reflected->klass() == SystemDictionary::reflect_Constructor_klass()) {
449 mirror = java_lang_reflect_Constructor::clazz(reflected);
450 slot = java_lang_reflect_Constructor::slot(reflected);
451 } else {
452 assert(reflected->klass() == SystemDictionary::reflect_Method_klass(), "wrong type");
453 mirror = java_lang_reflect_Method::clazz(reflected);
454 slot = java_lang_reflect_Method::slot(reflected);
455 }
456 Klass* k1 = java_lang_Class::as_Klass(mirror);
457
458 // Make sure class is initialized before handing id's out to methods
459 k1->initialize(CHECK_NULL);
460 Method* m = InstanceKlass::cast(k1)->method_with_idnum(slot);
461 ret = m==NULL? NULL : m->jmethod_id(); // return NULL if reflected method deleted
462 return ret;
463 JNI_END
464
465 DT_RETURN_MARK_DECL(FromReflectedField, jfieldID
466 , HOTSPOT_JNI_FROMREFLECTEDFIELD_RETURN((uintptr_t)_ret_ref));
467
468 JNI_ENTRY(jfieldID, jni_FromReflectedField(JNIEnv *env, jobject field))
469 JNIWrapper("FromReflectedField");
470
471 HOTSPOT_JNI_FROMREFLECTEDFIELD_ENTRY(env, field);
472
473 jfieldID ret = NULL;
474 DT_RETURN_MARK(FromReflectedField, jfieldID, (const jfieldID&)ret);
475
476 // field is a handle to a java.lang.reflect.Field object
477 oop reflected = JNIHandles::resolve_non_null(field);
478 oop mirror = java_lang_reflect_Field::clazz(reflected);
479 Klass* k1 = java_lang_Class::as_Klass(mirror);
480 int slot = java_lang_reflect_Field::slot(reflected);
481 int modifiers = java_lang_reflect_Field::modifiers(reflected);
482
483 // Make sure class is initialized before handing id's out to fields
484 k1->initialize(CHECK_NULL);
485
486 // First check if this is a static field
487 if (modifiers & JVM_ACC_STATIC) {
488 intptr_t offset = InstanceKlass::cast(k1)->field_offset( slot );
489 JNIid* id = InstanceKlass::cast(k1)->jni_id_for(offset);
490 assert(id != NULL, "corrupt Field object");
491 debug_only(id->set_is_static_field_id();)
492 // A jfieldID for a static field is a JNIid specifying the field holder and the offset within the Klass*
493 ret = jfieldIDWorkaround::to_static_jfieldID(id);
494 return ret;
495 }
496
497 // The slot is the index of the field description in the field-array
498 // The jfieldID is the offset of the field within the object
499 // It may also have hash bits for k, if VerifyJNIFields is turned on.
500 intptr_t offset = InstanceKlass::cast(k1)->field_offset( slot );
501 assert(InstanceKlass::cast(k1)->contains_field_offset(offset), "stay within object");
502 ret = jfieldIDWorkaround::to_instance_jfieldID(k1, offset);
503 return ret;
504 JNI_END
505
506
507 DT_RETURN_MARK_DECL(ToReflectedMethod, jobject
508 , HOTSPOT_JNI_TOREFLECTEDMETHOD_RETURN(_ret_ref));
509
510 JNI_ENTRY(jobject, jni_ToReflectedMethod(JNIEnv *env, jclass cls, jmethodID method_id, jboolean isStatic))
511 JNIWrapper("ToReflectedMethod");
512
513 HOTSPOT_JNI_TOREFLECTEDMETHOD_ENTRY(env, cls, (uintptr_t) method_id, isStatic);
514
515 jobject ret = NULL;
516 DT_RETURN_MARK(ToReflectedMethod, jobject, (const jobject&)ret);
517
518 methodHandle m (THREAD, Method::resolve_jmethod_id(method_id));
519 assert(m->is_static() == (isStatic != 0), "jni_ToReflectedMethod access flags doesn't match");
520 oop reflection_method;
521 if (m->is_initializer()) {
522 reflection_method = Reflection::new_constructor(m, CHECK_NULL);
523 } else {
524 reflection_method = Reflection::new_method(m, false, CHECK_NULL);
525 }
526 ret = JNIHandles::make_local(env, reflection_method);
527 return ret;
528 JNI_END
529
530 DT_RETURN_MARK_DECL(GetSuperclass, jclass
531 , HOTSPOT_JNI_GETSUPERCLASS_RETURN(_ret_ref));
532
533 JNI_ENTRY(jclass, jni_GetSuperclass(JNIEnv *env, jclass sub))
534 JNIWrapper("GetSuperclass");
535
536 HOTSPOT_JNI_GETSUPERCLASS_ENTRY(env, sub);
537
538 jclass obj = NULL;
539 DT_RETURN_MARK(GetSuperclass, jclass, (const jclass&)obj);
540
541 oop mirror = JNIHandles::resolve_non_null(sub);
542 // primitive classes return NULL
543 if (java_lang_Class::is_primitive(mirror)) return NULL;
544
545 // Rules of Class.getSuperClass as implemented by KLass::java_super:
546 // arrays return Object
547 // interfaces return NULL
548 // proper classes return Klass::super()
549 Klass* k = java_lang_Class::as_Klass(mirror);
550 if (k->is_interface()) return NULL;
551
552 // return mirror for superclass
553 Klass* super = k->java_super();
554 // super2 is the value computed by the compiler's getSuperClass intrinsic:
555 debug_only(Klass* super2 = ( k->is_array_klass()
556 ? SystemDictionary::Object_klass()
557 : k->super() ) );
558 assert(super == super2,
559 "java_super computation depends on interface, array, other super");
560 obj = (super == NULL) ? NULL : (jclass) JNIHandles::make_local(super->java_mirror());
561 return obj;
562 JNI_END
563
564 JNI_ENTRY_NO_PRESERVE(jboolean, jni_IsAssignableFrom(JNIEnv *env, jclass sub, jclass super))
565 JNIWrapper("IsSubclassOf");
566
567 HOTSPOT_JNI_ISASSIGNABLEFROM_ENTRY(env, sub, super);
568
569 oop sub_mirror = JNIHandles::resolve_non_null(sub);
570 oop super_mirror = JNIHandles::resolve_non_null(super);
571 if (java_lang_Class::is_primitive(sub_mirror) ||
572 java_lang_Class::is_primitive(super_mirror)) {
573 jboolean ret = (sub_mirror == super_mirror);
574
575 HOTSPOT_JNI_ISASSIGNABLEFROM_RETURN(ret);
576 return ret;
577 }
578 Klass* sub_klass = java_lang_Class::as_Klass(sub_mirror);
579 Klass* super_klass = java_lang_Class::as_Klass(super_mirror);
580 assert(sub_klass != NULL && super_klass != NULL, "invalid arguments to jni_IsAssignableFrom");
581 jboolean ret = sub_klass->is_subtype_of(super_klass) ?
582 JNI_TRUE : JNI_FALSE;
583
584 HOTSPOT_JNI_ISASSIGNABLEFROM_RETURN(ret);
585 return ret;
586 JNI_END
587
588
589 DT_RETURN_MARK_DECL(Throw, jint
590 , HOTSPOT_JNI_THROW_RETURN(_ret_ref));
591
592 JNI_ENTRY(jint, jni_Throw(JNIEnv *env, jthrowable obj))
593 JNIWrapper("Throw");
594
595 HOTSPOT_JNI_THROW_ENTRY(env, obj);
596
597 jint ret = JNI_OK;
598 DT_RETURN_MARK(Throw, jint, (const jint&)ret);
599
600 THROW_OOP_(JNIHandles::resolve(obj), JNI_OK);
601 ShouldNotReachHere();
602 return 0; // Mute compiler.
603 JNI_END
604
605
606 DT_RETURN_MARK_DECL(ThrowNew, jint
607 , HOTSPOT_JNI_THROWNEW_RETURN(_ret_ref));
608
609 JNI_ENTRY(jint, jni_ThrowNew(JNIEnv *env, jclass clazz, const char *message))
610 JNIWrapper("ThrowNew");
611
612 HOTSPOT_JNI_THROWNEW_ENTRY(env, clazz, (char *) message);
613
614 jint ret = JNI_OK;
615 DT_RETURN_MARK(ThrowNew, jint, (const jint&)ret);
616
617 InstanceKlass* k = InstanceKlass::cast(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz)));
618 Symbol* name = k->name();
619 Handle class_loader (THREAD, k->class_loader());
620 Handle protection_domain (THREAD, k->protection_domain());
621 THROW_MSG_LOADER_(name, (char *)message, class_loader, protection_domain, JNI_OK);
622 ShouldNotReachHere();
623 return 0; // Mute compiler.
624 JNI_END
625
626
627 // JNI functions only transform a pending async exception to a synchronous
628 // exception in ExceptionOccurred and ExceptionCheck calls, since
629 // delivering an async exception in other places won't change the native
630 // code's control flow and would be harmful when native code further calls
631 // JNI functions with a pending exception. Async exception is also checked
632 // during the call, so ExceptionOccurred/ExceptionCheck won't return
633 // false but deliver the async exception at the very end during
634 // state transition.
635
636 static void jni_check_async_exceptions(JavaThread *thread) {
637 assert(thread == Thread::current(), "must be itself");
638 thread->check_and_handle_async_exceptions();
639 }
640
641 JNI_ENTRY_NO_PRESERVE(jthrowable, jni_ExceptionOccurred(JNIEnv *env))
642 JNIWrapper("ExceptionOccurred");
643
644 HOTSPOT_JNI_EXCEPTIONOCCURRED_ENTRY(env);
645
646 jni_check_async_exceptions(thread);
647 oop exception = thread->pending_exception();
648 jthrowable ret = (jthrowable) JNIHandles::make_local(env, exception);
649
650 HOTSPOT_JNI_EXCEPTIONOCCURRED_RETURN(ret);
651 return ret;
652 JNI_END
653
654
655 JNI_ENTRY_NO_PRESERVE(void, jni_ExceptionDescribe(JNIEnv *env))
656 JNIWrapper("ExceptionDescribe");
657
658 HOTSPOT_JNI_EXCEPTIONDESCRIBE_ENTRY(env);
659
660 if (thread->has_pending_exception()) {
661 Handle ex(thread, thread->pending_exception());
662 thread->clear_pending_exception();
663 if (ex->is_a(SystemDictionary::ThreadDeath_klass())) {
664 // Don't print anything if we are being killed.
665 } else {
666 jio_fprintf(defaultStream::error_stream(), "Exception ");
667 if (thread != NULL && thread->threadObj() != NULL) {
668 ResourceMark rm(THREAD);
669 jio_fprintf(defaultStream::error_stream(),
670 "in thread \"%s\" ", thread->get_thread_name());
671 }
672 if (ex->is_a(SystemDictionary::Throwable_klass())) {
673 JavaValue result(T_VOID);
674 JavaCalls::call_virtual(&result,
675 ex,
676 SystemDictionary::Throwable_klass(),
677 vmSymbols::printStackTrace_name(),
678 vmSymbols::void_method_signature(),
679 THREAD);
680 // If an exception is thrown in the call it gets thrown away. Not much
681 // we can do with it. The native code that calls this, does not check
682 // for the exception - hence, it might still be in the thread when DestroyVM gets
683 // called, potentially causing a few asserts to trigger - since no pending exception
684 // is expected.
685 CLEAR_PENDING_EXCEPTION;
686 } else {
687 ResourceMark rm(THREAD);
688 jio_fprintf(defaultStream::error_stream(),
689 ". Uncaught exception of type %s.",
690 ex->klass()->external_name());
691 }
692 }
693 }
694
695 HOTSPOT_JNI_EXCEPTIONDESCRIBE_RETURN();
696 JNI_END
697
698
699 JNI_ENTRY_NO_PRESERVE(void, jni_ExceptionClear(JNIEnv *env))
700 JNIWrapper("ExceptionClear");
701
702 HOTSPOT_JNI_EXCEPTIONCLEAR_ENTRY(env);
703
704 // The jni code might be using this API to clear java thrown exception.
705 // So just mark jvmti thread exception state as exception caught.
706 JvmtiThreadState *state = JavaThread::current()->jvmti_thread_state();
707 if (state != NULL && state->is_exception_detected()) {
708 state->set_exception_caught();
709 }
710 thread->clear_pending_exception();
711
712 HOTSPOT_JNI_EXCEPTIONCLEAR_RETURN();
713 JNI_END
714
715
716 JNI_ENTRY(void, jni_FatalError(JNIEnv *env, const char *msg))
717 JNIWrapper("FatalError");
718
719 HOTSPOT_JNI_FATALERROR_ENTRY(env, (char *) msg);
720
721 tty->print_cr("FATAL ERROR in native method: %s", msg);
722 thread->print_stack();
723 os::abort(); // Dump core and abort
724 JNI_END
725
726
727 JNI_ENTRY(jint, jni_PushLocalFrame(JNIEnv *env, jint capacity))
728 JNIWrapper("PushLocalFrame");
729
730 HOTSPOT_JNI_PUSHLOCALFRAME_ENTRY(env, capacity);
731
732 //%note jni_11
733 if (capacity < 0 ||
734 ((MaxJNILocalCapacity > 0) && (capacity > MaxJNILocalCapacity))) {
735 HOTSPOT_JNI_PUSHLOCALFRAME_RETURN((uint32_t)JNI_ERR);
736 return JNI_ERR;
737 }
738 JNIHandleBlock* old_handles = thread->active_handles();
739 JNIHandleBlock* new_handles = JNIHandleBlock::allocate_block(thread);
740 assert(new_handles != NULL, "should not be NULL");
741 new_handles->set_pop_frame_link(old_handles);
742 thread->set_active_handles(new_handles);
743 jint ret = JNI_OK;
744 HOTSPOT_JNI_PUSHLOCALFRAME_RETURN(ret);
745 return ret;
746 JNI_END
747
748
749 JNI_ENTRY(jobject, jni_PopLocalFrame(JNIEnv *env, jobject result))
750 JNIWrapper("PopLocalFrame");
751
752 HOTSPOT_JNI_POPLOCALFRAME_ENTRY(env, result);
753
754 //%note jni_11
755 Handle result_handle(thread, JNIHandles::resolve(result));
756 JNIHandleBlock* old_handles = thread->active_handles();
757 JNIHandleBlock* new_handles = old_handles->pop_frame_link();
758 if (new_handles != NULL) {
759 // As a sanity check we only release the handle blocks if the pop_frame_link is not NULL.
760 // This way code will still work if PopLocalFrame is called without a corresponding
761 // PushLocalFrame call. Note that we set the pop_frame_link to NULL explicitly, otherwise
762 // the release_block call will release the blocks.
763 thread->set_active_handles(new_handles);
764 old_handles->set_pop_frame_link(NULL); // clear link we won't release new_handles below
765 JNIHandleBlock::release_block(old_handles, thread); // may block
766 result = JNIHandles::make_local(thread, result_handle());
767 }
768 HOTSPOT_JNI_POPLOCALFRAME_RETURN(result);
769 return result;
770 JNI_END
771
772
773 JNI_ENTRY(jobject, jni_NewGlobalRef(JNIEnv *env, jobject ref))
774 JNIWrapper("NewGlobalRef");
775
776 HOTSPOT_JNI_NEWGLOBALREF_ENTRY(env, ref);
777
778 Handle ref_handle(thread, JNIHandles::resolve(ref));
779 jobject ret = JNIHandles::make_global(ref_handle);
780
781 HOTSPOT_JNI_NEWGLOBALREF_RETURN(ret);
782 return ret;
783 JNI_END
784
785 // Must be JNI_ENTRY (with HandleMark)
786 JNI_ENTRY_NO_PRESERVE(void, jni_DeleteGlobalRef(JNIEnv *env, jobject ref))
787 JNIWrapper("DeleteGlobalRef");
788
789 HOTSPOT_JNI_DELETEGLOBALREF_ENTRY(env, ref);
790
791 JNIHandles::destroy_global(ref);
792
793 HOTSPOT_JNI_DELETEGLOBALREF_RETURN();
794 JNI_END
795
796 JNI_ENTRY_NO_PRESERVE(void, jni_DeleteLocalRef(JNIEnv *env, jobject obj))
797 JNIWrapper("DeleteLocalRef");
798
799 HOTSPOT_JNI_DELETELOCALREF_ENTRY(env, obj);
800
801 JNIHandles::destroy_local(obj);
802
803 HOTSPOT_JNI_DELETELOCALREF_RETURN();
804 JNI_END
805
806 JNI_ENTRY_NO_PRESERVE(jboolean, jni_IsSameObject(JNIEnv *env, jobject r1, jobject r2))
807 JNIWrapper("IsSameObject");
808
809 HOTSPOT_JNI_ISSAMEOBJECT_ENTRY(env, r1, r2);
810
811 jboolean ret = JNIHandles::is_same_object(r1, r2) ? JNI_TRUE : JNI_FALSE;
812
813 HOTSPOT_JNI_ISSAMEOBJECT_RETURN(ret);
814 return ret;
815 JNI_END
816
817
818 JNI_ENTRY(jobject, jni_NewLocalRef(JNIEnv *env, jobject ref))
819 JNIWrapper("NewLocalRef");
820
821 HOTSPOT_JNI_NEWLOCALREF_ENTRY(env, ref);
822
823 jobject ret = JNIHandles::make_local(env, JNIHandles::resolve(ref));
824
825 HOTSPOT_JNI_NEWLOCALREF_RETURN(ret);
826 return ret;
827 JNI_END
828
829 JNI_LEAF(jint, jni_EnsureLocalCapacity(JNIEnv *env, jint capacity))
830 JNIWrapper("EnsureLocalCapacity");
831
832 HOTSPOT_JNI_ENSURELOCALCAPACITY_ENTRY(env, capacity);
833
834 jint ret;
835 if (capacity >= 0 &&
836 ((MaxJNILocalCapacity <= 0) || (capacity <= MaxJNILocalCapacity))) {
837 ret = JNI_OK;
838 } else {
839 ret = JNI_ERR;
840 }
841
842 HOTSPOT_JNI_ENSURELOCALCAPACITY_RETURN(ret);
843 return ret;
844 JNI_END
845
846 // Return the Handle Type
847 JNI_LEAF(jobjectRefType, jni_GetObjectRefType(JNIEnv *env, jobject obj))
848 JNIWrapper("GetObjectRefType");
849
850 HOTSPOT_JNI_GETOBJECTREFTYPE_ENTRY(env, obj);
851
852 jobjectRefType ret = JNIInvalidRefType;
853 if (obj != NULL) {
854 ret = JNIHandles::handle_type(thread, obj);
855 }
856
857 HOTSPOT_JNI_GETOBJECTREFTYPE_RETURN((void *) ret);
858 return ret;
859 JNI_END
860
861
862 class JNI_ArgumentPusher : public SignatureIterator {
863 protected:
864 JavaCallArguments* _arguments;
865
866 void push_int(jint x) { _arguments->push_int(x); }
867 void push_long(jlong x) { _arguments->push_long(x); }
868 void push_float(jfloat x) { _arguments->push_float(x); }
869 void push_double(jdouble x) { _arguments->push_double(x); }
870 void push_object(jobject x) { _arguments->push_jobject(x); }
871
872 void push_boolean(jboolean b) {
873 // Normalize boolean arguments from native code by converting 1-255 to JNI_TRUE and
874 // 0 to JNI_FALSE. Boolean return values from native are normalized the same in
875 // TemplateInterpreterGenerator::generate_result_handler_for and
876 // SharedRuntime::generate_native_wrapper.
877 push_int(b == 0 ? JNI_FALSE : JNI_TRUE);
878 }
879
880 JNI_ArgumentPusher(Method* method)
881 : SignatureIterator(method->signature(),
882 Fingerprinter(methodHandle(Thread::current(), method)).fingerprint())
883 {
884 _arguments = NULL;
885 }
886
887 public:
888 virtual void push_arguments_on(JavaCallArguments* arguments) = 0;
889 };
890
891
892 class JNI_ArgumentPusherVaArg : public JNI_ArgumentPusher {
893 protected:
894 va_list _ap;
895
896 void set_ap(va_list rap) {
897 va_copy(_ap, rap);
898 }
899
900 friend class SignatureIterator; // so do_parameters_on can call do_type
901 void do_type(BasicType type) {
902 switch (type) {
903 // these are coerced to int when using va_arg
904 case T_BYTE:
905 case T_CHAR:
906 case T_SHORT:
907 case T_INT: push_int(va_arg(_ap, jint)); break;
908 case T_BOOLEAN: push_boolean((jboolean) va_arg(_ap, jint)); break;
909
910 // each of these paths is exercised by the various jck Call[Static,Nonvirtual,][Void,Int,..]Method[A,V,] tests
911
912 case T_LONG: push_long(va_arg(_ap, jlong)); break;
913 // float is coerced to double w/ va_arg
914 case T_FLOAT: push_float((jfloat) va_arg(_ap, jdouble)); break;
915 case T_DOUBLE: push_double(va_arg(_ap, jdouble)); break;
916
917 case T_ARRAY:
918 case T_OBJECT: push_object(va_arg(_ap, jobject)); break;
919 default: ShouldNotReachHere();
920 }
921 }
922
923 public:
924 JNI_ArgumentPusherVaArg(jmethodID method_id, va_list rap)
925 : JNI_ArgumentPusher(Method::resolve_jmethod_id(method_id)) {
926 set_ap(rap);
927 }
928
929 virtual void push_arguments_on(JavaCallArguments* arguments) {
930 _arguments = arguments;
931 do_parameters_on(this);
932 }
933 };
934
935
936 class JNI_ArgumentPusherArray : public JNI_ArgumentPusher {
937 protected:
938 const jvalue *_ap;
939
940 inline void set_ap(const jvalue *rap) { _ap = rap; }
941
942 friend class SignatureIterator; // so do_parameters_on can call do_type
943 void do_type(BasicType type) {
944 switch (type) {
945 case T_CHAR: push_int((_ap++)->c); break;
946 case T_SHORT: push_int((_ap++)->s); break;
947 case T_BYTE: push_int((_ap++)->b); break;
948 case T_INT: push_int((_ap++)->i); break;
949 case T_BOOLEAN: push_boolean((_ap++)->z); break;
950 case T_LONG: push_long((_ap++)->j); break;
951 case T_FLOAT: push_float((_ap++)->f); break;
952 case T_DOUBLE: push_double((_ap++)->d); break;
953 case T_ARRAY:
954 case T_OBJECT: push_object((_ap++)->l); break;
955 default: ShouldNotReachHere();
956 }
957 }
958
959 public:
960 JNI_ArgumentPusherArray(jmethodID method_id, const jvalue *rap)
961 : JNI_ArgumentPusher(Method::resolve_jmethod_id(method_id)) {
962 set_ap(rap);
963 }
964
965 virtual void push_arguments_on(JavaCallArguments* arguments) {
966 _arguments = arguments;
967 do_parameters_on(this);
968 }
969 };
970
971
972 enum JNICallType {
973 JNI_STATIC,
974 JNI_VIRTUAL,
975 JNI_NONVIRTUAL
976 };
977
978
979
980 static void jni_invoke_static(JNIEnv *env, JavaValue* result, jobject receiver, JNICallType call_type, jmethodID method_id, JNI_ArgumentPusher *args, TRAPS) {
981 methodHandle method(THREAD, Method::resolve_jmethod_id(method_id));
982
983 // Create object to hold arguments for the JavaCall, and associate it with
984 // the jni parser
985 ResourceMark rm(THREAD);
986 int number_of_parameters = method->size_of_parameters();
987 JavaCallArguments java_args(number_of_parameters);
988
989 assert(method->is_static(), "method should be static");
990
991 // Fill out JavaCallArguments object
992 args->push_arguments_on(&java_args);
993 // Initialize result type
994 result->set_type(args->return_type());
995
996 // Invoke the method. Result is returned as oop.
997 JavaCalls::call(result, method, &java_args, CHECK);
998
999 // Convert result
1000 if (is_reference_type(result->get_type())) {
1001 result->set_jobject(JNIHandles::make_local(env, (oop) result->get_jobject()));
1002 }
1003 }
1004
1005
1006 static void jni_invoke_nonstatic(JNIEnv *env, JavaValue* result, jobject receiver, JNICallType call_type, jmethodID method_id, JNI_ArgumentPusher *args, TRAPS) {
1007 oop recv = JNIHandles::resolve(receiver);
1008 if (recv == NULL) {
1009 THROW(vmSymbols::java_lang_NullPointerException());
1010 }
1011 Handle h_recv(THREAD, recv);
1012
1013 int number_of_parameters;
1014 Method* selected_method;
1015 {
1016 Method* m = Method::resolve_jmethod_id(method_id);
1017 number_of_parameters = m->size_of_parameters();
1018 Klass* holder = m->method_holder();
1019 if (call_type != JNI_VIRTUAL) {
1020 selected_method = m;
1021 } else if (!m->has_itable_index()) {
1022 // non-interface call -- for that little speed boost, don't handlize
1023 debug_only(NoSafepointVerifier nosafepoint;)
1024 // jni_GetMethodID makes sure class is linked and initialized
1025 // so m should have a valid vtable index.
1026 assert(m->valid_vtable_index(), "no valid vtable index");
1027 int vtbl_index = m->vtable_index();
1028 if (vtbl_index != Method::nonvirtual_vtable_index) {
1029 selected_method = h_recv->klass()->method_at_vtable(vtbl_index);
1030 } else {
1031 // final method
1032 selected_method = m;
1033 }
1034 } else {
1035 // interface call
1036 int itbl_index = m->itable_index();
1037 Klass* k = h_recv->klass();
1038 selected_method = InstanceKlass::cast(k)->method_at_itable(holder, itbl_index, CHECK);
1039 }
1040 }
1041
1042 methodHandle method(THREAD, selected_method);
1043
1044 // Create object to hold arguments for the JavaCall, and associate it with
1045 // the jni parser
1046 ResourceMark rm(THREAD);
1047 JavaCallArguments java_args(number_of_parameters);
1048
1049 // handle arguments
1050 assert(!method->is_static(), "method %s should not be static", method->name_and_sig_as_C_string());
1051 java_args.push_oop(h_recv); // Push jobject handle
1052
1053 // Fill out JavaCallArguments object
1054 args->push_arguments_on(&java_args);
1055 // Initialize result type
1056 result->set_type(args->return_type());
1057
1058 // Invoke the method. Result is returned as oop.
1059 JavaCalls::call(result, method, &java_args, CHECK);
1060
1061 // Convert result
1062 if (is_reference_type(result->get_type())) {
1063 result->set_jobject(JNIHandles::make_local(env, (oop) result->get_jobject()));
1064 }
1065 }
1066
1067
1068 static instanceOop alloc_object(jclass clazz, TRAPS) {
1069 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz));
1070 if (k == NULL) {
1071 ResourceMark rm(THREAD);
1072 THROW_(vmSymbols::java_lang_InstantiationException(), NULL);
1073 }
1074 k->check_valid_for_instantiation(false, CHECK_NULL);
1075 k->initialize(CHECK_NULL);
1076 instanceOop ih = InstanceKlass::cast(k)->allocate_instance(THREAD);
1077 return ih;
1078 }
1079
1080 DT_RETURN_MARK_DECL(AllocObject, jobject
1081 , HOTSPOT_JNI_ALLOCOBJECT_RETURN(_ret_ref));
1082
1083 JNI_ENTRY(jobject, jni_AllocObject(JNIEnv *env, jclass clazz))
1084 JNIWrapper("AllocObject");
1085
1086 HOTSPOT_JNI_ALLOCOBJECT_ENTRY(env, clazz);
1087
1088 jobject ret = NULL;
1089 DT_RETURN_MARK(AllocObject, jobject, (const jobject&)ret);
1090
1091 instanceOop i = alloc_object(clazz, CHECK_NULL);
1092 ret = JNIHandles::make_local(env, i);
1093 return ret;
1094 JNI_END
1095
1096 DT_RETURN_MARK_DECL(NewObjectA, jobject
1097 , HOTSPOT_JNI_NEWOBJECTA_RETURN(_ret_ref));
1098
1099 JNI_ENTRY(jobject, jni_NewObjectA(JNIEnv *env, jclass clazz, jmethodID methodID, const jvalue *args))
1100 JNIWrapper("NewObjectA");
1101
1102 HOTSPOT_JNI_NEWOBJECTA_ENTRY(env, clazz, (uintptr_t) methodID);
1103
1104 jobject obj = NULL;
1105 DT_RETURN_MARK(NewObjectA, jobject, (const jobject)obj);
1106
1107 instanceOop i = alloc_object(clazz, CHECK_NULL);
1108 obj = JNIHandles::make_local(env, i);
1109 JavaValue jvalue(T_VOID);
1110 JNI_ArgumentPusherArray ap(methodID, args);
1111 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_NULL);
1112 return obj;
1113 JNI_END
1114
1115
1116 DT_RETURN_MARK_DECL(NewObjectV, jobject
1117 , HOTSPOT_JNI_NEWOBJECTV_RETURN(_ret_ref));
1118
1119 JNI_ENTRY(jobject, jni_NewObjectV(JNIEnv *env, jclass clazz, jmethodID methodID, va_list args))
1120 JNIWrapper("NewObjectV");
1121
1122 HOTSPOT_JNI_NEWOBJECTV_ENTRY(env, clazz, (uintptr_t) methodID);
1123
1124 jobject obj = NULL;
1125 DT_RETURN_MARK(NewObjectV, jobject, (const jobject&)obj);
1126
1127 instanceOop i = alloc_object(clazz, CHECK_NULL);
1128 obj = JNIHandles::make_local(env, i);
1129 JavaValue jvalue(T_VOID);
1130 JNI_ArgumentPusherVaArg ap(methodID, args);
1131 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_NULL);
1132 return obj;
1133 JNI_END
1134
1135
1136 DT_RETURN_MARK_DECL(NewObject, jobject
1137 , HOTSPOT_JNI_NEWOBJECT_RETURN(_ret_ref));
1138
1139 JNI_ENTRY(jobject, jni_NewObject(JNIEnv *env, jclass clazz, jmethodID methodID, ...))
1140 JNIWrapper("NewObject");
1141
1142 HOTSPOT_JNI_NEWOBJECT_ENTRY(env, clazz, (uintptr_t) methodID);
1143
1144 jobject obj = NULL;
1145 DT_RETURN_MARK(NewObject, jobject, (const jobject&)obj);
1146
1147 instanceOop i = alloc_object(clazz, CHECK_NULL);
1148 obj = JNIHandles::make_local(env, i);
1149 va_list args;
1150 va_start(args, methodID);
1151 JavaValue jvalue(T_VOID);
1152 JNI_ArgumentPusherVaArg ap(methodID, args);
1153 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_NULL);
1154 va_end(args);
1155 return obj;
1156 JNI_END
1157
1158
1159 JNI_ENTRY(jclass, jni_GetObjectClass(JNIEnv *env, jobject obj))
1160 JNIWrapper("GetObjectClass");
1161
1162 HOTSPOT_JNI_GETOBJECTCLASS_ENTRY(env, obj);
1163
1164 Klass* k = JNIHandles::resolve_non_null(obj)->klass();
1165 jclass ret =
1166 (jclass) JNIHandles::make_local(env, k->java_mirror());
1167
1168 HOTSPOT_JNI_GETOBJECTCLASS_RETURN(ret);
1169 return ret;
1170 JNI_END
1171
1172 JNI_ENTRY_NO_PRESERVE(jboolean, jni_IsInstanceOf(JNIEnv *env, jobject obj, jclass clazz))
1173 JNIWrapper("IsInstanceOf");
1174
1175 HOTSPOT_JNI_ISINSTANCEOF_ENTRY(env, obj, clazz);
1176
1177 jboolean ret = JNI_TRUE;
1178 if (obj != NULL) {
1179 ret = JNI_FALSE;
1180 Klass* k = java_lang_Class::as_Klass(
1181 JNIHandles::resolve_non_null(clazz));
1182 if (k != NULL) {
1183 ret = JNIHandles::resolve_non_null(obj)->is_a(k) ? JNI_TRUE : JNI_FALSE;
1184 }
1185 }
1186
1187 HOTSPOT_JNI_ISINSTANCEOF_RETURN(ret);
1188 return ret;
1189 JNI_END
1190
1191
1192 static jmethodID get_method_id(JNIEnv *env, jclass clazz, const char *name_str,
1193 const char *sig, bool is_static, TRAPS) {
1194 // %%%% This code should probably just call into a method in the LinkResolver
1195 //
1196 // The class should have been loaded (we have an instance of the class
1197 // passed in) so the method and signature should already be in the symbol
1198 // table. If they're not there, the method doesn't exist.
1199 const char *name_to_probe = (name_str == NULL)
1200 ? vmSymbols::object_initializer_name()->as_C_string()
1201 : name_str;
1202 TempNewSymbol name = SymbolTable::probe(name_to_probe, (int)strlen(name_to_probe));
1203 TempNewSymbol signature = SymbolTable::probe(sig, (int)strlen(sig));
1204
1205 if (name == NULL || signature == NULL) {
1206 THROW_MSG_0(vmSymbols::java_lang_NoSuchMethodError(), name_str);
1207 }
1208
1209 Klass* klass = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz));
1210
1211 // Throw a NoSuchMethodError exception if we have an instance of a
1212 // primitive java.lang.Class
1213 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(clazz))) {
1214 ResourceMark rm;
1215 THROW_MSG_0(vmSymbols::java_lang_NoSuchMethodError(), err_msg("%s%s.%s%s", is_static ? "static " : "", klass->signature_name(), name_str, sig));
1216 }
1217
1218 // Make sure class is linked and initialized before handing id's out to
1219 // Method*s.
1220 klass->initialize(CHECK_NULL);
1221
1222 Method* m;
1223 if (name == vmSymbols::object_initializer_name() ||
1224 name == vmSymbols::class_initializer_name()) {
1225 // Never search superclasses for constructors
1226 if (klass->is_instance_klass()) {
1227 m = InstanceKlass::cast(klass)->find_method(name, signature);
1228 } else {
1229 m = NULL;
1230 }
1231 } else {
1232 m = klass->lookup_method(name, signature);
1233 if (m == NULL && klass->is_instance_klass()) {
1234 m = InstanceKlass::cast(klass)->lookup_method_in_ordered_interfaces(name, signature);
1235 }
1236 }
1237 if (m == NULL || (m->is_static() != is_static)) {
1238 ResourceMark rm;
1239 THROW_MSG_0(vmSymbols::java_lang_NoSuchMethodError(), err_msg("%s%s.%s%s", is_static ? "static " : "", klass->signature_name(), name_str, sig));
1240 }
1241 return m->jmethod_id();
1242 }
1243
1244
1245 JNI_ENTRY(jmethodID, jni_GetMethodID(JNIEnv *env, jclass clazz,
1246 const char *name, const char *sig))
1247 JNIWrapper("GetMethodID");
1248 HOTSPOT_JNI_GETMETHODID_ENTRY(env, clazz, (char *) name, (char *) sig);
1249 jmethodID ret = get_method_id(env, clazz, name, sig, false, thread);
1250 HOTSPOT_JNI_GETMETHODID_RETURN((uintptr_t) ret);
1251 return ret;
1252 JNI_END
1253
1254
1255 JNI_ENTRY(jmethodID, jni_GetStaticMethodID(JNIEnv *env, jclass clazz,
1256 const char *name, const char *sig))
1257 JNIWrapper("GetStaticMethodID");
1258 HOTSPOT_JNI_GETSTATICMETHODID_ENTRY(env, (char *) clazz, (char *) name, (char *)sig);
1259 jmethodID ret = get_method_id(env, clazz, name, sig, true, thread);
1260 HOTSPOT_JNI_GETSTATICMETHODID_RETURN((uintptr_t) ret);
1261 return ret;
1262 JNI_END
1263
1264
1265
1266 //
1267 // Calling Methods
1268 //
1269
1270
1271 #define DEFINE_CALLMETHOD(ResultType, Result, Tag \
1272 , EntryProbe, ReturnProbe) \
1273 \
1274 DT_RETURN_MARK_DECL_FOR(Result, Call##Result##Method, ResultType \
1275 , ReturnProbe); \
1276 \
1277 JNI_ENTRY(ResultType, \
1278 jni_Call##Result##Method(JNIEnv *env, jobject obj, jmethodID methodID, ...)) \
1279 JNIWrapper("Call" XSTR(Result) "Method"); \
1280 \
1281 EntryProbe; \
1282 ResultType ret = 0;\
1283 DT_RETURN_MARK_FOR(Result, Call##Result##Method, ResultType, \
1284 (const ResultType&)ret);\
1285 \
1286 va_list args; \
1287 va_start(args, methodID); \
1288 JavaValue jvalue(Tag); \
1289 JNI_ArgumentPusherVaArg ap(methodID, args); \
1290 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK_0); \
1291 va_end(args); \
1292 ret = jvalue.get_##ResultType(); \
1293 return ret;\
1294 JNI_END
1295
1296 // the runtime type of subword integral basic types is integer
1297 DEFINE_CALLMETHOD(jboolean, Boolean, T_BOOLEAN
1298 , HOTSPOT_JNI_CALLBOOLEANMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1299 HOTSPOT_JNI_CALLBOOLEANMETHOD_RETURN(_ret_ref))
1300 DEFINE_CALLMETHOD(jbyte, Byte, T_BYTE
1301 , HOTSPOT_JNI_CALLBYTEMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1302 HOTSPOT_JNI_CALLBYTEMETHOD_RETURN(_ret_ref))
1303 DEFINE_CALLMETHOD(jchar, Char, T_CHAR
1304 , HOTSPOT_JNI_CALLCHARMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1305 HOTSPOT_JNI_CALLCHARMETHOD_RETURN(_ret_ref))
1306 DEFINE_CALLMETHOD(jshort, Short, T_SHORT
1307 , HOTSPOT_JNI_CALLSHORTMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1308 HOTSPOT_JNI_CALLSHORTMETHOD_RETURN(_ret_ref))
1309
1310 DEFINE_CALLMETHOD(jobject, Object, T_OBJECT
1311 , HOTSPOT_JNI_CALLOBJECTMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1312 HOTSPOT_JNI_CALLOBJECTMETHOD_RETURN(_ret_ref))
1313 DEFINE_CALLMETHOD(jint, Int, T_INT,
1314 HOTSPOT_JNI_CALLINTMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1315 HOTSPOT_JNI_CALLINTMETHOD_RETURN(_ret_ref))
1316 DEFINE_CALLMETHOD(jlong, Long, T_LONG
1317 , HOTSPOT_JNI_CALLLONGMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1318 HOTSPOT_JNI_CALLLONGMETHOD_RETURN(_ret_ref))
1319 // Float and double probes don't return value because dtrace doesn't currently support it
1320 DEFINE_CALLMETHOD(jfloat, Float, T_FLOAT
1321 , HOTSPOT_JNI_CALLFLOATMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1322 HOTSPOT_JNI_CALLFLOATMETHOD_RETURN())
1323 DEFINE_CALLMETHOD(jdouble, Double, T_DOUBLE
1324 , HOTSPOT_JNI_CALLDOUBLEMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1325 HOTSPOT_JNI_CALLDOUBLEMETHOD_RETURN())
1326
1327 #define DEFINE_CALLMETHODV(ResultType, Result, Tag \
1328 , EntryProbe, ReturnProbe) \
1329 \
1330 DT_RETURN_MARK_DECL_FOR(Result, Call##Result##MethodV, ResultType \
1331 , ReturnProbe); \
1332 \
1333 JNI_ENTRY(ResultType, \
1334 jni_Call##Result##MethodV(JNIEnv *env, jobject obj, jmethodID methodID, va_list args)) \
1335 JNIWrapper("Call" XSTR(Result) "MethodV"); \
1336 \
1337 EntryProbe;\
1338 ResultType ret = 0;\
1339 DT_RETURN_MARK_FOR(Result, Call##Result##MethodV, ResultType, \
1340 (const ResultType&)ret);\
1341 \
1342 JavaValue jvalue(Tag); \
1343 JNI_ArgumentPusherVaArg ap(methodID, args); \
1344 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK_0); \
1345 ret = jvalue.get_##ResultType(); \
1346 return ret;\
1347 JNI_END
1348
1349 // the runtime type of subword integral basic types is integer
1350 DEFINE_CALLMETHODV(jboolean, Boolean, T_BOOLEAN
1351 , HOTSPOT_JNI_CALLBOOLEANMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1352 HOTSPOT_JNI_CALLBOOLEANMETHODV_RETURN(_ret_ref))
1353 DEFINE_CALLMETHODV(jbyte, Byte, T_BYTE
1354 , HOTSPOT_JNI_CALLBYTEMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1355 HOTSPOT_JNI_CALLBYTEMETHODV_RETURN(_ret_ref))
1356 DEFINE_CALLMETHODV(jchar, Char, T_CHAR
1357 , HOTSPOT_JNI_CALLCHARMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1358 HOTSPOT_JNI_CALLCHARMETHODV_RETURN(_ret_ref))
1359 DEFINE_CALLMETHODV(jshort, Short, T_SHORT
1360 , HOTSPOT_JNI_CALLSHORTMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1361 HOTSPOT_JNI_CALLSHORTMETHODV_RETURN(_ret_ref))
1362
1363 DEFINE_CALLMETHODV(jobject, Object, T_OBJECT
1364 , HOTSPOT_JNI_CALLOBJECTMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1365 HOTSPOT_JNI_CALLOBJECTMETHODV_RETURN(_ret_ref))
1366 DEFINE_CALLMETHODV(jint, Int, T_INT,
1367 HOTSPOT_JNI_CALLINTMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1368 HOTSPOT_JNI_CALLINTMETHODV_RETURN(_ret_ref))
1369 DEFINE_CALLMETHODV(jlong, Long, T_LONG
1370 , HOTSPOT_JNI_CALLLONGMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1371 HOTSPOT_JNI_CALLLONGMETHODV_RETURN(_ret_ref))
1372 // Float and double probes don't return value because dtrace doesn't currently support it
1373 DEFINE_CALLMETHODV(jfloat, Float, T_FLOAT
1374 , HOTSPOT_JNI_CALLFLOATMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1375 HOTSPOT_JNI_CALLFLOATMETHODV_RETURN())
1376 DEFINE_CALLMETHODV(jdouble, Double, T_DOUBLE
1377 , HOTSPOT_JNI_CALLDOUBLEMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1378 HOTSPOT_JNI_CALLDOUBLEMETHODV_RETURN())
1379
1380 #define DEFINE_CALLMETHODA(ResultType, Result, Tag \
1381 , EntryProbe, ReturnProbe) \
1382 \
1383 DT_RETURN_MARK_DECL_FOR(Result, Call##Result##MethodA, ResultType \
1384 , ReturnProbe); \
1385 \
1386 JNI_ENTRY(ResultType, \
1387 jni_Call##Result##MethodA(JNIEnv *env, jobject obj, jmethodID methodID, const jvalue *args)) \
1388 JNIWrapper("Call" XSTR(Result) "MethodA"); \
1389 EntryProbe; \
1390 ResultType ret = 0;\
1391 DT_RETURN_MARK_FOR(Result, Call##Result##MethodA, ResultType, \
1392 (const ResultType&)ret);\
1393 \
1394 JavaValue jvalue(Tag); \
1395 JNI_ArgumentPusherArray ap(methodID, args); \
1396 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK_0); \
1397 ret = jvalue.get_##ResultType(); \
1398 return ret;\
1399 JNI_END
1400
1401 // the runtime type of subword integral basic types is integer
1402 DEFINE_CALLMETHODA(jboolean, Boolean, T_BOOLEAN
1403 , HOTSPOT_JNI_CALLBOOLEANMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1404 HOTSPOT_JNI_CALLBOOLEANMETHODA_RETURN(_ret_ref))
1405 DEFINE_CALLMETHODA(jbyte, Byte, T_BYTE
1406 , HOTSPOT_JNI_CALLBYTEMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1407 HOTSPOT_JNI_CALLBYTEMETHODA_RETURN(_ret_ref))
1408 DEFINE_CALLMETHODA(jchar, Char, T_CHAR
1409 , HOTSPOT_JNI_CALLCHARMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1410 HOTSPOT_JNI_CALLCHARMETHODA_RETURN(_ret_ref))
1411 DEFINE_CALLMETHODA(jshort, Short, T_SHORT
1412 , HOTSPOT_JNI_CALLSHORTMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1413 HOTSPOT_JNI_CALLSHORTMETHODA_RETURN(_ret_ref))
1414
1415 DEFINE_CALLMETHODA(jobject, Object, T_OBJECT
1416 , HOTSPOT_JNI_CALLOBJECTMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1417 HOTSPOT_JNI_CALLOBJECTMETHODA_RETURN(_ret_ref))
1418 DEFINE_CALLMETHODA(jint, Int, T_INT,
1419 HOTSPOT_JNI_CALLINTMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1420 HOTSPOT_JNI_CALLINTMETHODA_RETURN(_ret_ref))
1421 DEFINE_CALLMETHODA(jlong, Long, T_LONG
1422 , HOTSPOT_JNI_CALLLONGMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1423 HOTSPOT_JNI_CALLLONGMETHODA_RETURN(_ret_ref))
1424 // Float and double probes don't return value because dtrace doesn't currently support it
1425 DEFINE_CALLMETHODA(jfloat, Float, T_FLOAT
1426 , HOTSPOT_JNI_CALLFLOATMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1427 HOTSPOT_JNI_CALLFLOATMETHODA_RETURN())
1428 DEFINE_CALLMETHODA(jdouble, Double, T_DOUBLE
1429 , HOTSPOT_JNI_CALLDOUBLEMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1430 HOTSPOT_JNI_CALLDOUBLEMETHODA_RETURN())
1431
1432 DT_VOID_RETURN_MARK_DECL(CallVoidMethod, HOTSPOT_JNI_CALLVOIDMETHOD_RETURN());
1433 DT_VOID_RETURN_MARK_DECL(CallVoidMethodV, HOTSPOT_JNI_CALLVOIDMETHODV_RETURN());
1434 DT_VOID_RETURN_MARK_DECL(CallVoidMethodA, HOTSPOT_JNI_CALLVOIDMETHODA_RETURN());
1435
1436
1437 JNI_ENTRY(void, jni_CallVoidMethod(JNIEnv *env, jobject obj, jmethodID methodID, ...))
1438 JNIWrapper("CallVoidMethod");
1439 HOTSPOT_JNI_CALLVOIDMETHOD_ENTRY(env, obj, (uintptr_t) methodID);
1440 DT_VOID_RETURN_MARK(CallVoidMethod);
1441
1442 va_list args;
1443 va_start(args, methodID);
1444 JavaValue jvalue(T_VOID);
1445 JNI_ArgumentPusherVaArg ap(methodID, args);
1446 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK);
1447 va_end(args);
1448 JNI_END
1449
1450
1451 JNI_ENTRY(void, jni_CallVoidMethodV(JNIEnv *env, jobject obj, jmethodID methodID, va_list args))
1452 JNIWrapper("CallVoidMethodV");
1453 HOTSPOT_JNI_CALLVOIDMETHODV_ENTRY(env, obj, (uintptr_t) methodID);
1454 DT_VOID_RETURN_MARK(CallVoidMethodV);
1455
1456 JavaValue jvalue(T_VOID);
1457 JNI_ArgumentPusherVaArg ap(methodID, args);
1458 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK);
1459 JNI_END
1460
1461
1462 JNI_ENTRY(void, jni_CallVoidMethodA(JNIEnv *env, jobject obj, jmethodID methodID, const jvalue *args))
1463 JNIWrapper("CallVoidMethodA");
1464 HOTSPOT_JNI_CALLVOIDMETHODA_ENTRY(env, obj, (uintptr_t) methodID);
1465 DT_VOID_RETURN_MARK(CallVoidMethodA);
1466
1467 JavaValue jvalue(T_VOID);
1468 JNI_ArgumentPusherArray ap(methodID, args);
1469 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK);
1470 JNI_END
1471
1472
1473
1474 #define DEFINE_CALLNONVIRTUALMETHOD(ResultType, Result, Tag \
1475 , EntryProbe, ReturnProbe) \
1476 \
1477 DT_RETURN_MARK_DECL_FOR(Result, CallNonvirtual##Result##Method, ResultType \
1478 , ReturnProbe);\
1479 \
1480 JNI_ENTRY(ResultType, \
1481 jni_CallNonvirtual##Result##Method(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, ...)) \
1482 JNIWrapper("CallNonvitual" XSTR(Result) "Method"); \
1483 \
1484 EntryProbe;\
1485 ResultType ret;\
1486 DT_RETURN_MARK_FOR(Result, CallNonvirtual##Result##Method, ResultType, \
1487 (const ResultType&)ret);\
1488 \
1489 va_list args; \
1490 va_start(args, methodID); \
1491 JavaValue jvalue(Tag); \
1492 JNI_ArgumentPusherVaArg ap(methodID, args); \
1493 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_0); \
1494 va_end(args); \
1495 ret = jvalue.get_##ResultType(); \
1496 return ret;\
1497 JNI_END
1498
1499 // the runtime type of subword integral basic types is integer
1500 DEFINE_CALLNONVIRTUALMETHOD(jboolean, Boolean, T_BOOLEAN
1501 , HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1502 HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHOD_RETURN(_ret_ref))
1503 DEFINE_CALLNONVIRTUALMETHOD(jbyte, Byte, T_BYTE
1504 , HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1505 HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHOD_RETURN(_ret_ref))
1506 DEFINE_CALLNONVIRTUALMETHOD(jchar, Char, T_CHAR
1507 , HOTSPOT_JNI_CALLNONVIRTUALCHARMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1508 HOTSPOT_JNI_CALLNONVIRTUALCHARMETHOD_RETURN(_ret_ref))
1509 DEFINE_CALLNONVIRTUALMETHOD(jshort, Short, T_SHORT
1510 , HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1511 HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHOD_RETURN(_ret_ref))
1512
1513 DEFINE_CALLNONVIRTUALMETHOD(jobject, Object, T_OBJECT
1514 , HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1515 HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHOD_RETURN(_ret_ref))
1516 DEFINE_CALLNONVIRTUALMETHOD(jint, Int, T_INT
1517 , HOTSPOT_JNI_CALLNONVIRTUALINTMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1518 HOTSPOT_JNI_CALLNONVIRTUALINTMETHOD_RETURN(_ret_ref))
1519 DEFINE_CALLNONVIRTUALMETHOD(jlong, Long, T_LONG
1520 , HOTSPOT_JNI_CALLNONVIRTUALLONGMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1521 // Float and double probes don't return value because dtrace doesn't currently support it
1522 HOTSPOT_JNI_CALLNONVIRTUALLONGMETHOD_RETURN(_ret_ref))
1523 DEFINE_CALLNONVIRTUALMETHOD(jfloat, Float, T_FLOAT
1524 , HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1525 HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHOD_RETURN())
1526 DEFINE_CALLNONVIRTUALMETHOD(jdouble, Double, T_DOUBLE
1527 , HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1528 HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHOD_RETURN())
1529
1530 #define DEFINE_CALLNONVIRTUALMETHODV(ResultType, Result, Tag \
1531 , EntryProbe, ReturnProbe) \
1532 \
1533 DT_RETURN_MARK_DECL_FOR(Result, CallNonvirtual##Result##MethodV, ResultType \
1534 , ReturnProbe);\
1535 \
1536 JNI_ENTRY(ResultType, \
1537 jni_CallNonvirtual##Result##MethodV(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, va_list args)) \
1538 JNIWrapper("CallNonvitual" XSTR(Result) "MethodV"); \
1539 \
1540 EntryProbe;\
1541 ResultType ret;\
1542 DT_RETURN_MARK_FOR(Result, CallNonvirtual##Result##MethodV, ResultType, \
1543 (const ResultType&)ret);\
1544 \
1545 JavaValue jvalue(Tag); \
1546 JNI_ArgumentPusherVaArg ap(methodID, args); \
1547 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_0); \
1548 ret = jvalue.get_##ResultType(); \
1549 return ret;\
1550 JNI_END
1551
1552 // the runtime type of subword integral basic types is integer
1553 DEFINE_CALLNONVIRTUALMETHODV(jboolean, Boolean, T_BOOLEAN
1554 , HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1555 HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHODV_RETURN(_ret_ref))
1556 DEFINE_CALLNONVIRTUALMETHODV(jbyte, Byte, T_BYTE
1557 , HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1558 HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHODV_RETURN(_ret_ref))
1559 DEFINE_CALLNONVIRTUALMETHODV(jchar, Char, T_CHAR
1560 , HOTSPOT_JNI_CALLNONVIRTUALCHARMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1561 HOTSPOT_JNI_CALLNONVIRTUALCHARMETHODV_RETURN(_ret_ref))
1562 DEFINE_CALLNONVIRTUALMETHODV(jshort, Short, T_SHORT
1563 , HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1564 HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHODV_RETURN(_ret_ref))
1565
1566 DEFINE_CALLNONVIRTUALMETHODV(jobject, Object, T_OBJECT
1567 , HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1568 HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHODV_RETURN(_ret_ref))
1569 DEFINE_CALLNONVIRTUALMETHODV(jint, Int, T_INT
1570 , HOTSPOT_JNI_CALLNONVIRTUALINTMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1571 HOTSPOT_JNI_CALLNONVIRTUALINTMETHODV_RETURN(_ret_ref))
1572 DEFINE_CALLNONVIRTUALMETHODV(jlong, Long, T_LONG
1573 , HOTSPOT_JNI_CALLNONVIRTUALLONGMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1574 // Float and double probes don't return value because dtrace doesn't currently support it
1575 HOTSPOT_JNI_CALLNONVIRTUALLONGMETHODV_RETURN(_ret_ref))
1576 DEFINE_CALLNONVIRTUALMETHODV(jfloat, Float, T_FLOAT
1577 , HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1578 HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHODV_RETURN())
1579 DEFINE_CALLNONVIRTUALMETHODV(jdouble, Double, T_DOUBLE
1580 , HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1581 HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHODV_RETURN())
1582
1583 #define DEFINE_CALLNONVIRTUALMETHODA(ResultType, Result, Tag \
1584 , EntryProbe, ReturnProbe) \
1585 \
1586 DT_RETURN_MARK_DECL_FOR(Result, CallNonvirtual##Result##MethodA, ResultType \
1587 , ReturnProbe);\
1588 \
1589 JNI_ENTRY(ResultType, \
1590 jni_CallNonvirtual##Result##MethodA(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, const jvalue *args)) \
1591 JNIWrapper("CallNonvitual" XSTR(Result) "MethodA"); \
1592 \
1593 EntryProbe;\
1594 ResultType ret;\
1595 DT_RETURN_MARK_FOR(Result, CallNonvirtual##Result##MethodA, ResultType, \
1596 (const ResultType&)ret);\
1597 \
1598 JavaValue jvalue(Tag); \
1599 JNI_ArgumentPusherArray ap(methodID, args); \
1600 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_0); \
1601 ret = jvalue.get_##ResultType(); \
1602 return ret;\
1603 JNI_END
1604
1605 // the runtime type of subword integral basic types is integer
1606 DEFINE_CALLNONVIRTUALMETHODA(jboolean, Boolean, T_BOOLEAN
1607 , HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1608 HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHODA_RETURN(_ret_ref))
1609 DEFINE_CALLNONVIRTUALMETHODA(jbyte, Byte, T_BYTE
1610 , HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1611 HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHODA_RETURN(_ret_ref))
1612 DEFINE_CALLNONVIRTUALMETHODA(jchar, Char, T_CHAR
1613 , HOTSPOT_JNI_CALLNONVIRTUALCHARMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1614 HOTSPOT_JNI_CALLNONVIRTUALCHARMETHODA_RETURN(_ret_ref))
1615 DEFINE_CALLNONVIRTUALMETHODA(jshort, Short, T_SHORT
1616 , HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1617 HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHODA_RETURN(_ret_ref))
1618
1619 DEFINE_CALLNONVIRTUALMETHODA(jobject, Object, T_OBJECT
1620 , HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1621 HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHODA_RETURN(_ret_ref))
1622 DEFINE_CALLNONVIRTUALMETHODA(jint, Int, T_INT
1623 , HOTSPOT_JNI_CALLNONVIRTUALINTMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1624 HOTSPOT_JNI_CALLNONVIRTUALINTMETHODA_RETURN(_ret_ref))
1625 DEFINE_CALLNONVIRTUALMETHODA(jlong, Long, T_LONG
1626 , HOTSPOT_JNI_CALLNONVIRTUALLONGMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1627 // Float and double probes don't return value because dtrace doesn't currently support it
1628 HOTSPOT_JNI_CALLNONVIRTUALLONGMETHODA_RETURN(_ret_ref))
1629 DEFINE_CALLNONVIRTUALMETHODA(jfloat, Float, T_FLOAT
1630 , HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1631 HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHODA_RETURN())
1632 DEFINE_CALLNONVIRTUALMETHODA(jdouble, Double, T_DOUBLE
1633 , HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1634 HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHODA_RETURN())
1635
1636 DT_VOID_RETURN_MARK_DECL(CallNonvirtualVoidMethod
1637 , HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHOD_RETURN());
1638 DT_VOID_RETURN_MARK_DECL(CallNonvirtualVoidMethodV
1639 , HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHODV_RETURN());
1640 DT_VOID_RETURN_MARK_DECL(CallNonvirtualVoidMethodA
1641 , HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHODA_RETURN());
1642
1643 JNI_ENTRY(void, jni_CallNonvirtualVoidMethod(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, ...))
1644 JNIWrapper("CallNonvirtualVoidMethod");
1645
1646 HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHOD_ENTRY(env, obj, cls, (uintptr_t) methodID);
1647 DT_VOID_RETURN_MARK(CallNonvirtualVoidMethod);
1648
1649 va_list args;
1650 va_start(args, methodID);
1651 JavaValue jvalue(T_VOID);
1652 JNI_ArgumentPusherVaArg ap(methodID, args);
1653 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK);
1654 va_end(args);
1655 JNI_END
1656
1657
1658 JNI_ENTRY(void, jni_CallNonvirtualVoidMethodV(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, va_list args))
1659 JNIWrapper("CallNonvirtualVoidMethodV");
1660
1661 HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHODV_ENTRY(
1662 env, obj, cls, (uintptr_t) methodID);
1663 DT_VOID_RETURN_MARK(CallNonvirtualVoidMethodV);
1664
1665 JavaValue jvalue(T_VOID);
1666 JNI_ArgumentPusherVaArg ap(methodID, args);
1667 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK);
1668 JNI_END
1669
1670
1671 JNI_ENTRY(void, jni_CallNonvirtualVoidMethodA(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, const jvalue *args))
1672 JNIWrapper("CallNonvirtualVoidMethodA");
1673 HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHODA_ENTRY(
1674 env, obj, cls, (uintptr_t) methodID);
1675 DT_VOID_RETURN_MARK(CallNonvirtualVoidMethodA);
1676 JavaValue jvalue(T_VOID);
1677 JNI_ArgumentPusherArray ap(methodID, args);
1678 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK);
1679 JNI_END
1680
1681
1682
1683 #define DEFINE_CALLSTATICMETHOD(ResultType, Result, Tag \
1684 , EntryProbe, ResultProbe) \
1685 \
1686 DT_RETURN_MARK_DECL_FOR(Result, CallStatic##Result##Method, ResultType \
1687 , ResultProbe); \
1688 \
1689 JNI_ENTRY(ResultType, \
1690 jni_CallStatic##Result##Method(JNIEnv *env, jclass cls, jmethodID methodID, ...)) \
1691 JNIWrapper("CallStatic" XSTR(Result) "Method"); \
1692 \
1693 EntryProbe; \
1694 ResultType ret = 0;\
1695 DT_RETURN_MARK_FOR(Result, CallStatic##Result##Method, ResultType, \
1696 (const ResultType&)ret);\
1697 \
1698 va_list args; \
1699 va_start(args, methodID); \
1700 JavaValue jvalue(Tag); \
1701 JNI_ArgumentPusherVaArg ap(methodID, args); \
1702 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK_0); \
1703 va_end(args); \
1704 ret = jvalue.get_##ResultType(); \
1705 return ret;\
1706 JNI_END
1707
1708 // the runtime type of subword integral basic types is integer
1709 DEFINE_CALLSTATICMETHOD(jboolean, Boolean, T_BOOLEAN
1710 , HOTSPOT_JNI_CALLSTATICBOOLEANMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1711 HOTSPOT_JNI_CALLSTATICBOOLEANMETHOD_RETURN(_ret_ref));
1712 DEFINE_CALLSTATICMETHOD(jbyte, Byte, T_BYTE
1713 , HOTSPOT_JNI_CALLSTATICBYTEMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1714 HOTSPOT_JNI_CALLSTATICBYTEMETHOD_RETURN(_ret_ref));
1715 DEFINE_CALLSTATICMETHOD(jchar, Char, T_CHAR
1716 , HOTSPOT_JNI_CALLSTATICCHARMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1717 HOTSPOT_JNI_CALLSTATICCHARMETHOD_RETURN(_ret_ref));
1718 DEFINE_CALLSTATICMETHOD(jshort, Short, T_SHORT
1719 , HOTSPOT_JNI_CALLSTATICSHORTMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1720 HOTSPOT_JNI_CALLSTATICSHORTMETHOD_RETURN(_ret_ref));
1721
1722 DEFINE_CALLSTATICMETHOD(jobject, Object, T_OBJECT
1723 , HOTSPOT_JNI_CALLSTATICOBJECTMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1724 HOTSPOT_JNI_CALLSTATICOBJECTMETHOD_RETURN(_ret_ref));
1725 DEFINE_CALLSTATICMETHOD(jint, Int, T_INT
1726 , HOTSPOT_JNI_CALLSTATICINTMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1727 HOTSPOT_JNI_CALLSTATICINTMETHOD_RETURN(_ret_ref));
1728 DEFINE_CALLSTATICMETHOD(jlong, Long, T_LONG
1729 , HOTSPOT_JNI_CALLSTATICLONGMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1730 HOTSPOT_JNI_CALLSTATICLONGMETHOD_RETURN(_ret_ref));
1731 // Float and double probes don't return value because dtrace doesn't currently support it
1732 DEFINE_CALLSTATICMETHOD(jfloat, Float, T_FLOAT
1733 , HOTSPOT_JNI_CALLSTATICFLOATMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1734 HOTSPOT_JNI_CALLSTATICFLOATMETHOD_RETURN());
1735 DEFINE_CALLSTATICMETHOD(jdouble, Double, T_DOUBLE
1736 , HOTSPOT_JNI_CALLSTATICDOUBLEMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1737 HOTSPOT_JNI_CALLSTATICDOUBLEMETHOD_RETURN());
1738
1739 #define DEFINE_CALLSTATICMETHODV(ResultType, Result, Tag \
1740 , EntryProbe, ResultProbe) \
1741 \
1742 DT_RETURN_MARK_DECL_FOR(Result, CallStatic##Result##MethodV, ResultType \
1743 , ResultProbe); \
1744 \
1745 JNI_ENTRY(ResultType, \
1746 jni_CallStatic##Result##MethodV(JNIEnv *env, jclass cls, jmethodID methodID, va_list args)) \
1747 JNIWrapper("CallStatic" XSTR(Result) "MethodV"); \
1748 \
1749 EntryProbe; \
1750 ResultType ret = 0;\
1751 DT_RETURN_MARK_FOR(Result, CallStatic##Result##MethodV, ResultType, \
1752 (const ResultType&)ret);\
1753 \
1754 JavaValue jvalue(Tag); \
1755 JNI_ArgumentPusherVaArg ap(methodID, args); \
1756 /* Make sure class is initialized before trying to invoke its method */ \
1757 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); \
1758 k->initialize(CHECK_0); \
1759 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK_0); \
1760 va_end(args); \
1761 ret = jvalue.get_##ResultType(); \
1762 return ret;\
1763 JNI_END
1764
1765 // the runtime type of subword integral basic types is integer
1766 DEFINE_CALLSTATICMETHODV(jboolean, Boolean, T_BOOLEAN
1767 , HOTSPOT_JNI_CALLSTATICBOOLEANMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1768 HOTSPOT_JNI_CALLSTATICBOOLEANMETHODV_RETURN(_ret_ref));
1769 DEFINE_CALLSTATICMETHODV(jbyte, Byte, T_BYTE
1770 , HOTSPOT_JNI_CALLSTATICBYTEMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1771 HOTSPOT_JNI_CALLSTATICBYTEMETHODV_RETURN(_ret_ref));
1772 DEFINE_CALLSTATICMETHODV(jchar, Char, T_CHAR
1773 , HOTSPOT_JNI_CALLSTATICCHARMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1774 HOTSPOT_JNI_CALLSTATICCHARMETHODV_RETURN(_ret_ref));
1775 DEFINE_CALLSTATICMETHODV(jshort, Short, T_SHORT
1776 , HOTSPOT_JNI_CALLSTATICSHORTMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1777 HOTSPOT_JNI_CALLSTATICSHORTMETHODV_RETURN(_ret_ref));
1778
1779 DEFINE_CALLSTATICMETHODV(jobject, Object, T_OBJECT
1780 , HOTSPOT_JNI_CALLSTATICOBJECTMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1781 HOTSPOT_JNI_CALLSTATICOBJECTMETHODV_RETURN(_ret_ref));
1782 DEFINE_CALLSTATICMETHODV(jint, Int, T_INT
1783 , HOTSPOT_JNI_CALLSTATICINTMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1784 HOTSPOT_JNI_CALLSTATICINTMETHODV_RETURN(_ret_ref));
1785 DEFINE_CALLSTATICMETHODV(jlong, Long, T_LONG
1786 , HOTSPOT_JNI_CALLSTATICLONGMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1787 HOTSPOT_JNI_CALLSTATICLONGMETHODV_RETURN(_ret_ref));
1788 // Float and double probes don't return value because dtrace doesn't currently support it
1789 DEFINE_CALLSTATICMETHODV(jfloat, Float, T_FLOAT
1790 , HOTSPOT_JNI_CALLSTATICFLOATMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1791 HOTSPOT_JNI_CALLSTATICFLOATMETHODV_RETURN());
1792 DEFINE_CALLSTATICMETHODV(jdouble, Double, T_DOUBLE
1793 , HOTSPOT_JNI_CALLSTATICDOUBLEMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1794 HOTSPOT_JNI_CALLSTATICDOUBLEMETHODV_RETURN());
1795
1796 #define DEFINE_CALLSTATICMETHODA(ResultType, Result, Tag \
1797 , EntryProbe, ResultProbe) \
1798 \
1799 DT_RETURN_MARK_DECL_FOR(Result, CallStatic##Result##MethodA, ResultType \
1800 , ResultProbe); \
1801 \
1802 JNI_ENTRY(ResultType, \
1803 jni_CallStatic##Result##MethodA(JNIEnv *env, jclass cls, jmethodID methodID, const jvalue *args)) \
1804 JNIWrapper("CallStatic" XSTR(Result) "MethodA"); \
1805 \
1806 EntryProbe; \
1807 ResultType ret = 0;\
1808 DT_RETURN_MARK_FOR(Result, CallStatic##Result##MethodA, ResultType, \
1809 (const ResultType&)ret);\
1810 \
1811 JavaValue jvalue(Tag); \
1812 JNI_ArgumentPusherArray ap(methodID, args); \
1813 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK_0); \
1814 ret = jvalue.get_##ResultType(); \
1815 return ret;\
1816 JNI_END
1817
1818 // the runtime type of subword integral basic types is integer
1819 DEFINE_CALLSTATICMETHODA(jboolean, Boolean, T_BOOLEAN
1820 , HOTSPOT_JNI_CALLSTATICBOOLEANMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1821 HOTSPOT_JNI_CALLSTATICBOOLEANMETHODA_RETURN(_ret_ref));
1822 DEFINE_CALLSTATICMETHODA(jbyte, Byte, T_BYTE
1823 , HOTSPOT_JNI_CALLSTATICBYTEMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1824 HOTSPOT_JNI_CALLSTATICBYTEMETHODA_RETURN(_ret_ref));
1825 DEFINE_CALLSTATICMETHODA(jchar, Char, T_CHAR
1826 , HOTSPOT_JNI_CALLSTATICCHARMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1827 HOTSPOT_JNI_CALLSTATICCHARMETHODA_RETURN(_ret_ref));
1828 DEFINE_CALLSTATICMETHODA(jshort, Short, T_SHORT
1829 , HOTSPOT_JNI_CALLSTATICSHORTMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1830 HOTSPOT_JNI_CALLSTATICSHORTMETHODA_RETURN(_ret_ref));
1831
1832 DEFINE_CALLSTATICMETHODA(jobject, Object, T_OBJECT
1833 , HOTSPOT_JNI_CALLSTATICOBJECTMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1834 HOTSPOT_JNI_CALLSTATICOBJECTMETHODA_RETURN(_ret_ref));
1835 DEFINE_CALLSTATICMETHODA(jint, Int, T_INT
1836 , HOTSPOT_JNI_CALLSTATICINTMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1837 HOTSPOT_JNI_CALLSTATICINTMETHODA_RETURN(_ret_ref));
1838 DEFINE_CALLSTATICMETHODA(jlong, Long, T_LONG
1839 , HOTSPOT_JNI_CALLSTATICLONGMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1840 HOTSPOT_JNI_CALLSTATICLONGMETHODA_RETURN(_ret_ref));
1841 // Float and double probes don't return value because dtrace doesn't currently support it
1842 DEFINE_CALLSTATICMETHODA(jfloat, Float, T_FLOAT
1843 , HOTSPOT_JNI_CALLSTATICFLOATMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1844 HOTSPOT_JNI_CALLSTATICFLOATMETHODA_RETURN());
1845 DEFINE_CALLSTATICMETHODA(jdouble, Double, T_DOUBLE
1846 , HOTSPOT_JNI_CALLSTATICDOUBLEMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1847 HOTSPOT_JNI_CALLSTATICDOUBLEMETHODA_RETURN());
1848
1849 DT_VOID_RETURN_MARK_DECL(CallStaticVoidMethod
1850 , HOTSPOT_JNI_CALLSTATICVOIDMETHOD_RETURN());
1851 DT_VOID_RETURN_MARK_DECL(CallStaticVoidMethodV
1852 , HOTSPOT_JNI_CALLSTATICVOIDMETHODV_RETURN());
1853 DT_VOID_RETURN_MARK_DECL(CallStaticVoidMethodA
1854 , HOTSPOT_JNI_CALLSTATICVOIDMETHODA_RETURN());
1855
1856 JNI_ENTRY(void, jni_CallStaticVoidMethod(JNIEnv *env, jclass cls, jmethodID methodID, ...))
1857 JNIWrapper("CallStaticVoidMethod");
1858 HOTSPOT_JNI_CALLSTATICVOIDMETHOD_ENTRY(env, cls, (uintptr_t) methodID);
1859 DT_VOID_RETURN_MARK(CallStaticVoidMethod);
1860
1861 va_list args;
1862 va_start(args, methodID);
1863 JavaValue jvalue(T_VOID);
1864 JNI_ArgumentPusherVaArg ap(methodID, args);
1865 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK);
1866 va_end(args);
1867 JNI_END
1868
1869
1870 JNI_ENTRY(void, jni_CallStaticVoidMethodV(JNIEnv *env, jclass cls, jmethodID methodID, va_list args))
1871 JNIWrapper("CallStaticVoidMethodV");
1872 HOTSPOT_JNI_CALLSTATICVOIDMETHODV_ENTRY(env, cls, (uintptr_t) methodID);
1873 DT_VOID_RETURN_MARK(CallStaticVoidMethodV);
1874
1875 JavaValue jvalue(T_VOID);
1876 JNI_ArgumentPusherVaArg ap(methodID, args);
1877 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK);
1878 JNI_END
1879
1880
1881 JNI_ENTRY(void, jni_CallStaticVoidMethodA(JNIEnv *env, jclass cls, jmethodID methodID, const jvalue *args))
1882 JNIWrapper("CallStaticVoidMethodA");
1883 HOTSPOT_JNI_CALLSTATICVOIDMETHODA_ENTRY(env, cls, (uintptr_t) methodID);
1884 DT_VOID_RETURN_MARK(CallStaticVoidMethodA);
1885
1886 JavaValue jvalue(T_VOID);
1887 JNI_ArgumentPusherArray ap(methodID, args);
1888 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK);
1889 JNI_END
1890
1891
1892 //
1893 // Accessing Fields
1894 //
1895
1896
1897 DT_RETURN_MARK_DECL(GetFieldID, jfieldID
1898 , HOTSPOT_JNI_GETFIELDID_RETURN((uintptr_t)_ret_ref));
1899
1900 JNI_ENTRY(jfieldID, jni_GetFieldID(JNIEnv *env, jclass clazz,
1901 const char *name, const char *sig))
1902 JNIWrapper("GetFieldID");
1903 HOTSPOT_JNI_GETFIELDID_ENTRY(env, clazz, (char *) name, (char *) sig);
1904 jfieldID ret = 0;
1905 DT_RETURN_MARK(GetFieldID, jfieldID, (const jfieldID&)ret);
1906
1907 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz));
1908
1909 // The class should have been loaded (we have an instance of the class
1910 // passed in) so the field and signature should already be in the symbol
1911 // table. If they're not there, the field doesn't exist.
1912 TempNewSymbol fieldname = SymbolTable::probe(name, (int)strlen(name));
1913 TempNewSymbol signame = SymbolTable::probe(sig, (int)strlen(sig));
1914 if (fieldname == NULL || signame == NULL) {
1915 ResourceMark rm;
1916 THROW_MSG_0(vmSymbols::java_lang_NoSuchFieldError(), err_msg("%s.%s %s", k->external_name(), name, sig));
1917 }
1918
1919 // Make sure class is initialized before handing id's out to fields
1920 k->initialize(CHECK_NULL);
1921
1922 fieldDescriptor fd;
1923 if (!k->is_instance_klass() ||
1924 !InstanceKlass::cast(k)->find_field(fieldname, signame, false, &fd)) {
1925 ResourceMark rm;
1926 THROW_MSG_0(vmSymbols::java_lang_NoSuchFieldError(), err_msg("%s.%s %s", k->external_name(), name, sig));
1927 }
1928
1929 // A jfieldID for a non-static field is simply the offset of the field within the instanceOop
1930 // It may also have hash bits for k, if VerifyJNIFields is turned on.
1931 ret = jfieldIDWorkaround::to_instance_jfieldID(k, fd.offset());
1932 return ret;
1933 JNI_END
1934
1935
1936 JNI_ENTRY(jobject, jni_GetObjectField(JNIEnv *env, jobject obj, jfieldID fieldID))
1937 JNIWrapper("GetObjectField");
1938 HOTSPOT_JNI_GETOBJECTFIELD_ENTRY(env, obj, (uintptr_t) fieldID);
1939 oop o = JNIHandles::resolve_non_null(obj);
1940 Klass* k = o->klass();
1941 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID);
1942 // Keep JVMTI addition small and only check enabled flag here.
1943 // jni_GetField_probe() assumes that is okay to create handles.
1944 if (JvmtiExport::should_post_field_access()) {
1945 o = JvmtiExport::jni_GetField_probe(thread, obj, o, k, fieldID, false);
1946 }
1947 oop loaded_obj = HeapAccess<ON_UNKNOWN_OOP_REF>::oop_load_at(o, offset);
1948 jobject ret = JNIHandles::make_local(env, loaded_obj);
1949 HOTSPOT_JNI_GETOBJECTFIELD_RETURN(ret);
1950 return ret;
1951 JNI_END
1952
1953
1954
1955 #define DEFINE_GETFIELD(Return,Fieldname,Result \
1956 , EntryProbe, ReturnProbe) \
1957 \
1958 DT_RETURN_MARK_DECL_FOR(Result, Get##Result##Field, Return \
1959 , ReturnProbe); \
1960 \
1961 JNI_ENTRY_NO_PRESERVE(Return, jni_Get##Result##Field(JNIEnv *env, jobject obj, jfieldID fieldID)) \
1962 JNIWrapper("Get" XSTR(Result) "Field"); \
1963 \
1964 EntryProbe; \
1965 Return ret = 0;\
1966 DT_RETURN_MARK_FOR(Result, Get##Result##Field, Return, (const Return&)ret);\
1967 \
1968 oop o = JNIHandles::resolve_non_null(obj); \
1969 Klass* k = o->klass(); \
1970 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID); \
1971 /* Keep JVMTI addition small and only check enabled flag here. */ \
1972 /* jni_GetField_probe_nh() assumes that is not okay to create handles */ \
1973 /* and creates a ResetNoHandleMark. */ \
1974 if (JvmtiExport::should_post_field_access()) { \
1975 o = JvmtiExport::jni_GetField_probe_nh(thread, obj, o, k, fieldID, false); \
1976 } \
1977 ret = o->Fieldname##_field(offset); \
1978 return ret; \
1979 JNI_END
1980
1981 DEFINE_GETFIELD(jboolean, bool, Boolean
1982 , HOTSPOT_JNI_GETBOOLEANFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
1983 HOTSPOT_JNI_GETBOOLEANFIELD_RETURN(_ret_ref))
1984 DEFINE_GETFIELD(jbyte, byte, Byte
1985 , HOTSPOT_JNI_GETBYTEFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
1986 HOTSPOT_JNI_GETBYTEFIELD_RETURN(_ret_ref))
1987 DEFINE_GETFIELD(jchar, char, Char
1988 , HOTSPOT_JNI_GETCHARFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
1989 HOTSPOT_JNI_GETCHARFIELD_RETURN(_ret_ref))
1990 DEFINE_GETFIELD(jshort, short, Short
1991 , HOTSPOT_JNI_GETSHORTFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
1992 HOTSPOT_JNI_GETSHORTFIELD_RETURN(_ret_ref))
1993 DEFINE_GETFIELD(jint, int, Int
1994 , HOTSPOT_JNI_GETINTFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
1995 HOTSPOT_JNI_GETINTFIELD_RETURN(_ret_ref))
1996 DEFINE_GETFIELD(jlong, long, Long
1997 , HOTSPOT_JNI_GETLONGFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
1998 HOTSPOT_JNI_GETLONGFIELD_RETURN(_ret_ref))
1999 // Float and double probes don't return value because dtrace doesn't currently support it
2000 DEFINE_GETFIELD(jfloat, float, Float
2001 , HOTSPOT_JNI_GETFLOATFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2002 HOTSPOT_JNI_GETFLOATFIELD_RETURN())
2003 DEFINE_GETFIELD(jdouble, double, Double
2004 , HOTSPOT_JNI_GETDOUBLEFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2005 HOTSPOT_JNI_GETDOUBLEFIELD_RETURN())
2006
2007 address jni_GetBooleanField_addr() {
2008 return (address)jni_GetBooleanField;
2009 }
2010 address jni_GetByteField_addr() {
2011 return (address)jni_GetByteField;
2012 }
2013 address jni_GetCharField_addr() {
2014 return (address)jni_GetCharField;
2015 }
2016 address jni_GetShortField_addr() {
2017 return (address)jni_GetShortField;
2018 }
2019 address jni_GetIntField_addr() {
2020 return (address)jni_GetIntField;
2021 }
2022 address jni_GetLongField_addr() {
2023 return (address)jni_GetLongField;
2024 }
2025 address jni_GetFloatField_addr() {
2026 return (address)jni_GetFloatField;
2027 }
2028 address jni_GetDoubleField_addr() {
2029 return (address)jni_GetDoubleField;
2030 }
2031
2032 JNI_ENTRY_NO_PRESERVE(void, jni_SetObjectField(JNIEnv *env, jobject obj, jfieldID fieldID, jobject value))
2033 JNIWrapper("SetObjectField");
2034 HOTSPOT_JNI_SETOBJECTFIELD_ENTRY(env, obj, (uintptr_t) fieldID, value);
2035 oop o = JNIHandles::resolve_non_null(obj);
2036 Klass* k = o->klass();
2037 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID);
2038 // Keep JVMTI addition small and only check enabled flag here.
2039 // jni_SetField_probe_nh() assumes that is not okay to create handles
2040 // and creates a ResetNoHandleMark.
2041 if (JvmtiExport::should_post_field_modification()) {
2042 jvalue field_value;
2043 field_value.l = value;
2044 o = JvmtiExport::jni_SetField_probe_nh(thread, obj, o, k, fieldID, false, JVM_SIGNATURE_CLASS, (jvalue *)&field_value);
2045 }
2046 HeapAccess<ON_UNKNOWN_OOP_REF>::oop_store_at(o, offset, JNIHandles::resolve(value));
2047 HOTSPOT_JNI_SETOBJECTFIELD_RETURN();
2048 JNI_END
2049
2050
2051 #define DEFINE_SETFIELD(Argument,Fieldname,Result,SigType,unionType \
2052 , EntryProbe, ReturnProbe) \
2053 \
2054 JNI_ENTRY_NO_PRESERVE(void, jni_Set##Result##Field(JNIEnv *env, jobject obj, jfieldID fieldID, Argument value)) \
2055 JNIWrapper("Set" XSTR(Result) "Field"); \
2056 \
2057 EntryProbe; \
2058 \
2059 oop o = JNIHandles::resolve_non_null(obj); \
2060 Klass* k = o->klass(); \
2061 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID); \
2062 /* Keep JVMTI addition small and only check enabled flag here. */ \
2063 /* jni_SetField_probe_nh() assumes that is not okay to create handles */ \
2064 /* and creates a ResetNoHandleMark. */ \
2065 if (JvmtiExport::should_post_field_modification()) { \
2066 jvalue field_value; \
2067 field_value.unionType = value; \
2068 o = JvmtiExport::jni_SetField_probe_nh(thread, obj, o, k, fieldID, false, SigType, (jvalue *)&field_value); \
2069 } \
2070 if (SigType == JVM_SIGNATURE_BOOLEAN) { value = ((jboolean)value) & 1; } \
2071 o->Fieldname##_field_put(offset, value); \
2072 ReturnProbe; \
2073 JNI_END
2074
2075 DEFINE_SETFIELD(jboolean, bool, Boolean, JVM_SIGNATURE_BOOLEAN, z
2076 , HOTSPOT_JNI_SETBOOLEANFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value),
2077 HOTSPOT_JNI_SETBOOLEANFIELD_RETURN())
2078 DEFINE_SETFIELD(jbyte, byte, Byte, JVM_SIGNATURE_BYTE, b
2079 , HOTSPOT_JNI_SETBYTEFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value),
2080 HOTSPOT_JNI_SETBYTEFIELD_RETURN())
2081 DEFINE_SETFIELD(jchar, char, Char, JVM_SIGNATURE_CHAR, c
2082 , HOTSPOT_JNI_SETCHARFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value),
2083 HOTSPOT_JNI_SETCHARFIELD_RETURN())
2084 DEFINE_SETFIELD(jshort, short, Short, JVM_SIGNATURE_SHORT, s
2085 , HOTSPOT_JNI_SETSHORTFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value),
2086 HOTSPOT_JNI_SETSHORTFIELD_RETURN())
2087 DEFINE_SETFIELD(jint, int, Int, JVM_SIGNATURE_INT, i
2088 , HOTSPOT_JNI_SETINTFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value),
2089 HOTSPOT_JNI_SETINTFIELD_RETURN())
2090 DEFINE_SETFIELD(jlong, long, Long, JVM_SIGNATURE_LONG, j
2091 , HOTSPOT_JNI_SETLONGFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value),
2092 HOTSPOT_JNI_SETLONGFIELD_RETURN())
2093 // Float and double probes don't return value because dtrace doesn't currently support it
2094 DEFINE_SETFIELD(jfloat, float, Float, JVM_SIGNATURE_FLOAT, f
2095 , HOTSPOT_JNI_SETFLOATFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2096 HOTSPOT_JNI_SETFLOATFIELD_RETURN())
2097 DEFINE_SETFIELD(jdouble, double, Double, JVM_SIGNATURE_DOUBLE, d
2098 , HOTSPOT_JNI_SETDOUBLEFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2099 HOTSPOT_JNI_SETDOUBLEFIELD_RETURN())
2100
2101 DT_RETURN_MARK_DECL(ToReflectedField, jobject
2102 , HOTSPOT_JNI_TOREFLECTEDFIELD_RETURN(_ret_ref));
2103
2104 JNI_ENTRY(jobject, jni_ToReflectedField(JNIEnv *env, jclass cls, jfieldID fieldID, jboolean isStatic))
2105 JNIWrapper("ToReflectedField");
2106 HOTSPOT_JNI_TOREFLECTEDFIELD_ENTRY(env, cls, (uintptr_t) fieldID, isStatic);
2107 jobject ret = NULL;
2108 DT_RETURN_MARK(ToReflectedField, jobject, (const jobject&)ret);
2109
2110 fieldDescriptor fd;
2111 bool found = false;
2112 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2113
2114 assert(jfieldIDWorkaround::is_static_jfieldID(fieldID) == (isStatic != 0), "invalid fieldID");
2115
2116 if (isStatic) {
2117 // Static field. The fieldID a JNIid specifying the field holder and the offset within the Klass*.
2118 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID);
2119 assert(id->is_static_field_id(), "invalid static field id");
2120 found = id->find_local_field(&fd);
2121 } else {
2122 // Non-static field. The fieldID is really the offset of the field within the instanceOop.
2123 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID);
2124 found = InstanceKlass::cast(k)->find_field_from_offset(offset, false, &fd);
2125 }
2126 assert(found, "bad fieldID passed into jni_ToReflectedField");
2127 oop reflected = Reflection::new_field(&fd, CHECK_NULL);
2128 ret = JNIHandles::make_local(env, reflected);
2129 return ret;
2130 JNI_END
2131
2132
2133 //
2134 // Accessing Static Fields
2135 //
2136 DT_RETURN_MARK_DECL(GetStaticFieldID, jfieldID
2137 , HOTSPOT_JNI_GETSTATICFIELDID_RETURN((uintptr_t)_ret_ref));
2138
2139 JNI_ENTRY(jfieldID, jni_GetStaticFieldID(JNIEnv *env, jclass clazz,
2140 const char *name, const char *sig))
2141 JNIWrapper("GetStaticFieldID");
2142 HOTSPOT_JNI_GETSTATICFIELDID_ENTRY(env, clazz, (char *) name, (char *) sig);
2143 jfieldID ret = NULL;
2144 DT_RETURN_MARK(GetStaticFieldID, jfieldID, (const jfieldID&)ret);
2145
2146 // The class should have been loaded (we have an instance of the class
2147 // passed in) so the field and signature should already be in the symbol
2148 // table. If they're not there, the field doesn't exist.
2149 TempNewSymbol fieldname = SymbolTable::probe(name, (int)strlen(name));
2150 TempNewSymbol signame = SymbolTable::probe(sig, (int)strlen(sig));
2151 if (fieldname == NULL || signame == NULL) {
2152 THROW_MSG_0(vmSymbols::java_lang_NoSuchFieldError(), (char*) name);
2153 }
2154 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz));
2155 // Make sure class is initialized before handing id's out to static fields
2156 k->initialize(CHECK_NULL);
2157
2158 fieldDescriptor fd;
2159 if (!k->is_instance_klass() ||
2160 !InstanceKlass::cast(k)->find_field(fieldname, signame, true, &fd)) {
2161 THROW_MSG_0(vmSymbols::java_lang_NoSuchFieldError(), (char*) name);
2162 }
2163
2164 // A jfieldID for a static field is a JNIid specifying the field holder and the offset within the Klass*
2165 JNIid* id = fd.field_holder()->jni_id_for(fd.offset());
2166 debug_only(id->set_is_static_field_id();)
2167
2168 debug_only(id->verify(fd.field_holder()));
2169
2170 ret = jfieldIDWorkaround::to_static_jfieldID(id);
2171 return ret;
2172 JNI_END
2173
2174
2175 JNI_ENTRY(jobject, jni_GetStaticObjectField(JNIEnv *env, jclass clazz, jfieldID fieldID))
2176 JNIWrapper("GetStaticObjectField");
2177 HOTSPOT_JNI_GETSTATICOBJECTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID);
2178 #if INCLUDE_JNI_CHECK
2179 DEBUG_ONLY(Klass* param_k = jniCheck::validate_class(thread, clazz);)
2180 #endif // INCLUDE_JNI_CHECK
2181 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID);
2182 assert(id->is_static_field_id(), "invalid static field id");
2183 // Keep JVMTI addition small and only check enabled flag here.
2184 // jni_GetField_probe() assumes that is okay to create handles.
2185 if (JvmtiExport::should_post_field_access()) {
2186 JvmtiExport::jni_GetField_probe(thread, NULL, NULL, id->holder(), fieldID, true);
2187 }
2188 jobject ret = JNIHandles::make_local(id->holder()->java_mirror()->obj_field(id->offset()));
2189 HOTSPOT_JNI_GETSTATICOBJECTFIELD_RETURN(ret);
2190 return ret;
2191 JNI_END
2192
2193
2194 #define DEFINE_GETSTATICFIELD(Return,Fieldname,Result \
2195 , EntryProbe, ReturnProbe) \
2196 \
2197 DT_RETURN_MARK_DECL_FOR(Result, GetStatic##Result##Field, Return \
2198 , ReturnProbe); \
2199 \
2200 JNI_ENTRY(Return, jni_GetStatic##Result##Field(JNIEnv *env, jclass clazz, jfieldID fieldID)) \
2201 JNIWrapper("GetStatic" XSTR(Result) "Field"); \
2202 EntryProbe; \
2203 Return ret = 0;\
2204 DT_RETURN_MARK_FOR(Result, GetStatic##Result##Field, Return, \
2205 (const Return&)ret);\
2206 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID); \
2207 assert(id->is_static_field_id(), "invalid static field id"); \
2208 /* Keep JVMTI addition small and only check enabled flag here. */ \
2209 /* jni_GetField_probe() assumes that is okay to create handles. */ \
2210 if (JvmtiExport::should_post_field_access()) { \
2211 JvmtiExport::jni_GetField_probe(thread, NULL, NULL, id->holder(), fieldID, true); \
2212 } \
2213 ret = id->holder()->java_mirror()-> Fieldname##_field (id->offset()); \
2214 return ret;\
2215 JNI_END
2216
2217 DEFINE_GETSTATICFIELD(jboolean, bool, Boolean
2218 , HOTSPOT_JNI_GETSTATICBOOLEANFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICBOOLEANFIELD_RETURN(_ret_ref))
2219 DEFINE_GETSTATICFIELD(jbyte, byte, Byte
2220 , HOTSPOT_JNI_GETSTATICBYTEFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICBYTEFIELD_RETURN(_ret_ref) )
2221 DEFINE_GETSTATICFIELD(jchar, char, Char
2222 , HOTSPOT_JNI_GETSTATICCHARFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICCHARFIELD_RETURN(_ret_ref) )
2223 DEFINE_GETSTATICFIELD(jshort, short, Short
2224 , HOTSPOT_JNI_GETSTATICSHORTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICSHORTFIELD_RETURN(_ret_ref) )
2225 DEFINE_GETSTATICFIELD(jint, int, Int
2226 , HOTSPOT_JNI_GETSTATICINTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICINTFIELD_RETURN(_ret_ref) )
2227 DEFINE_GETSTATICFIELD(jlong, long, Long
2228 , HOTSPOT_JNI_GETSTATICLONGFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICLONGFIELD_RETURN(_ret_ref) )
2229 // Float and double probes don't return value because dtrace doesn't currently support it
2230 DEFINE_GETSTATICFIELD(jfloat, float, Float
2231 , HOTSPOT_JNI_GETSTATICFLOATFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICFLOATFIELD_RETURN() )
2232 DEFINE_GETSTATICFIELD(jdouble, double, Double
2233 , HOTSPOT_JNI_GETSTATICDOUBLEFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICDOUBLEFIELD_RETURN() )
2234
2235 JNI_ENTRY(void, jni_SetStaticObjectField(JNIEnv *env, jclass clazz, jfieldID fieldID, jobject value))
2236 JNIWrapper("SetStaticObjectField");
2237 HOTSPOT_JNI_SETSTATICOBJECTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value);
2238 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID);
2239 assert(id->is_static_field_id(), "invalid static field id");
2240 // Keep JVMTI addition small and only check enabled flag here.
2241 // jni_SetField_probe() assumes that is okay to create handles.
2242 if (JvmtiExport::should_post_field_modification()) {
2243 jvalue field_value;
2244 field_value.l = value;
2245 JvmtiExport::jni_SetField_probe(thread, NULL, NULL, id->holder(), fieldID, true, JVM_SIGNATURE_CLASS, (jvalue *)&field_value);
2246 }
2247 id->holder()->java_mirror()->obj_field_put(id->offset(), JNIHandles::resolve(value));
2248 HOTSPOT_JNI_SETSTATICOBJECTFIELD_RETURN();
2249 JNI_END
2250
2251
2252
2253 #define DEFINE_SETSTATICFIELD(Argument,Fieldname,Result,SigType,unionType \
2254 , EntryProbe, ReturnProbe) \
2255 \
2256 JNI_ENTRY(void, jni_SetStatic##Result##Field(JNIEnv *env, jclass clazz, jfieldID fieldID, Argument value)) \
2257 JNIWrapper("SetStatic" XSTR(Result) "Field"); \
2258 EntryProbe; \
2259 \
2260 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID); \
2261 assert(id->is_static_field_id(), "invalid static field id"); \
2262 /* Keep JVMTI addition small and only check enabled flag here. */ \
2263 /* jni_SetField_probe() assumes that is okay to create handles. */ \
2264 if (JvmtiExport::should_post_field_modification()) { \
2265 jvalue field_value; \
2266 field_value.unionType = value; \
2267 JvmtiExport::jni_SetField_probe(thread, NULL, NULL, id->holder(), fieldID, true, SigType, (jvalue *)&field_value); \
2268 } \
2269 if (SigType == JVM_SIGNATURE_BOOLEAN) { value = ((jboolean)value) & 1; } \
2270 id->holder()->java_mirror()-> Fieldname##_field_put (id->offset(), value); \
2271 ReturnProbe;\
2272 JNI_END
2273
2274 DEFINE_SETSTATICFIELD(jboolean, bool, Boolean, JVM_SIGNATURE_BOOLEAN, z
2275 , HOTSPOT_JNI_SETSTATICBOOLEANFIELD_ENTRY(env, clazz, (uintptr_t)fieldID, value),
2276 HOTSPOT_JNI_SETSTATICBOOLEANFIELD_RETURN())
2277 DEFINE_SETSTATICFIELD(jbyte, byte, Byte, JVM_SIGNATURE_BYTE, b
2278 , HOTSPOT_JNI_SETSTATICBYTEFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value),
2279 HOTSPOT_JNI_SETSTATICBYTEFIELD_RETURN())
2280 DEFINE_SETSTATICFIELD(jchar, char, Char, JVM_SIGNATURE_CHAR, c
2281 , HOTSPOT_JNI_SETSTATICCHARFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value),
2282 HOTSPOT_JNI_SETSTATICCHARFIELD_RETURN())
2283 DEFINE_SETSTATICFIELD(jshort, short, Short, JVM_SIGNATURE_SHORT, s
2284 , HOTSPOT_JNI_SETSTATICSHORTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value),
2285 HOTSPOT_JNI_SETSTATICSHORTFIELD_RETURN())
2286 DEFINE_SETSTATICFIELD(jint, int, Int, JVM_SIGNATURE_INT, i
2287 , HOTSPOT_JNI_SETSTATICINTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value),
2288 HOTSPOT_JNI_SETSTATICINTFIELD_RETURN())
2289 DEFINE_SETSTATICFIELD(jlong, long, Long, JVM_SIGNATURE_LONG, j
2290 , HOTSPOT_JNI_SETSTATICLONGFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value),
2291 HOTSPOT_JNI_SETSTATICLONGFIELD_RETURN())
2292 // Float and double probes don't return value because dtrace doesn't currently support it
2293 DEFINE_SETSTATICFIELD(jfloat, float, Float, JVM_SIGNATURE_FLOAT, f
2294 , HOTSPOT_JNI_SETSTATICFLOATFIELD_ENTRY(env, clazz, (uintptr_t) fieldID),
2295 HOTSPOT_JNI_SETSTATICFLOATFIELD_RETURN())
2296 DEFINE_SETSTATICFIELD(jdouble, double, Double, JVM_SIGNATURE_DOUBLE, d
2297 , HOTSPOT_JNI_SETSTATICDOUBLEFIELD_ENTRY(env, clazz, (uintptr_t) fieldID),
2298 HOTSPOT_JNI_SETSTATICDOUBLEFIELD_RETURN())
2299
2300 //
2301 // String Operations
2302 //
2303
2304 // Unicode Interface
2305
2306 DT_RETURN_MARK_DECL(NewString, jstring
2307 , HOTSPOT_JNI_NEWSTRING_RETURN(_ret_ref));
2308
2309 JNI_ENTRY(jstring, jni_NewString(JNIEnv *env, const jchar *unicodeChars, jsize len))
2310 JNIWrapper("NewString");
2311 HOTSPOT_JNI_NEWSTRING_ENTRY(env, (uint16_t *) unicodeChars, len);
2312 jstring ret = NULL;
2313 DT_RETURN_MARK(NewString, jstring, (const jstring&)ret);
2314 oop string=java_lang_String::create_oop_from_unicode((jchar*) unicodeChars, len, CHECK_NULL);
2315 ret = (jstring) JNIHandles::make_local(env, string);
2316 return ret;
2317 JNI_END
2318
2319
2320 JNI_ENTRY_NO_PRESERVE(jsize, jni_GetStringLength(JNIEnv *env, jstring string))
2321 JNIWrapper("GetStringLength");
2322 HOTSPOT_JNI_GETSTRINGLENGTH_ENTRY(env, string);
2323 jsize ret = 0;
2324 oop s = JNIHandles::resolve_non_null(string);
2325 ret = java_lang_String::length(s);
2326 HOTSPOT_JNI_GETSTRINGLENGTH_RETURN(ret);
2327 return ret;
2328 JNI_END
2329
2330
2331 JNI_ENTRY_NO_PRESERVE(const jchar*, jni_GetStringChars(
2332 JNIEnv *env, jstring string, jboolean *isCopy))
2333 JNIWrapper("GetStringChars");
2334 HOTSPOT_JNI_GETSTRINGCHARS_ENTRY(env, string, (uintptr_t *) isCopy);
2335 jchar* buf = NULL;
2336 oop s = JNIHandles::resolve_non_null(string);
2337 typeArrayOop s_value = java_lang_String::value(s);
2338 if (s_value != NULL) {
2339 int s_len = java_lang_String::length(s, s_value);
2340 bool is_latin1 = java_lang_String::is_latin1(s);
2341 buf = NEW_C_HEAP_ARRAY_RETURN_NULL(jchar, s_len + 1, mtInternal); // add one for zero termination
2342 /* JNI Specification states return NULL on OOM */
2343 if (buf != NULL) {
2344 if (s_len > 0) {
2345 if (!is_latin1) {
2346 ArrayAccess<>::arraycopy_to_native(s_value, (size_t) typeArrayOopDesc::element_offset<jchar>(0),
2347 buf, s_len);
2348 } else {
2349 for (int i = 0; i < s_len; i++) {
2350 buf[i] = ((jchar) s_value->byte_at(i)) & 0xff;
2351 }
2352 }
2353 }
2354 buf[s_len] = 0;
2355 //%note jni_5
2356 if (isCopy != NULL) {
2357 *isCopy = JNI_TRUE;
2358 }
2359 }
2360 }
2361 HOTSPOT_JNI_GETSTRINGCHARS_RETURN(buf);
2362 return buf;
2363 JNI_END
2364
2365
2366 JNI_ENTRY_NO_PRESERVE(void, jni_ReleaseStringChars(JNIEnv *env, jstring str, const jchar *chars))
2367 JNIWrapper("ReleaseStringChars");
2368 HOTSPOT_JNI_RELEASESTRINGCHARS_ENTRY(env, str, (uint16_t *) chars);
2369 //%note jni_6
2370 if (chars != NULL) {
2371 // Since String objects are supposed to be immutable, don't copy any
2372 // new data back. A bad user will have to go after the char array.
2373 FreeHeap((void*) chars);
2374 }
2375 HOTSPOT_JNI_RELEASESTRINGCHARS_RETURN();
2376 JNI_END
2377
2378
2379 // UTF Interface
2380
2381 DT_RETURN_MARK_DECL(NewStringUTF, jstring
2382 , HOTSPOT_JNI_NEWSTRINGUTF_RETURN(_ret_ref));
2383
2384 JNI_ENTRY(jstring, jni_NewStringUTF(JNIEnv *env, const char *bytes))
2385 JNIWrapper("NewStringUTF");
2386 HOTSPOT_JNI_NEWSTRINGUTF_ENTRY(env, (char *) bytes);
2387 jstring ret;
2388 DT_RETURN_MARK(NewStringUTF, jstring, (const jstring&)ret);
2389
2390 oop result = java_lang_String::create_oop_from_str((char*) bytes, CHECK_NULL);
2391 ret = (jstring) JNIHandles::make_local(env, result);
2392 return ret;
2393 JNI_END
2394
2395
2396 JNI_ENTRY(jsize, jni_GetStringUTFLength(JNIEnv *env, jstring string))
2397 JNIWrapper("GetStringUTFLength");
2398 HOTSPOT_JNI_GETSTRINGUTFLENGTH_ENTRY(env, string);
2399 oop java_string = JNIHandles::resolve_non_null(string);
2400 jsize ret = java_lang_String::utf8_length(java_string);
2401 HOTSPOT_JNI_GETSTRINGUTFLENGTH_RETURN(ret);
2402 return ret;
2403 JNI_END
2404
2405
2406 JNI_ENTRY(const char*, jni_GetStringUTFChars(JNIEnv *env, jstring string, jboolean *isCopy))
2407 JNIWrapper("GetStringUTFChars");
2408 HOTSPOT_JNI_GETSTRINGUTFCHARS_ENTRY(env, string, (uintptr_t *) isCopy);
2409 char* result = NULL;
2410 oop java_string = JNIHandles::resolve_non_null(string);
2411 typeArrayOop s_value = java_lang_String::value(java_string);
2412 if (s_value != NULL) {
2413 size_t length = java_lang_String::utf8_length(java_string, s_value);
2414 /* JNI Specification states return NULL on OOM */
2415 result = AllocateHeap(length + 1, mtInternal, 0, AllocFailStrategy::RETURN_NULL);
2416 if (result != NULL) {
2417 java_lang_String::as_utf8_string(java_string, s_value, result, (int) length + 1);
2418 if (isCopy != NULL) {
2419 *isCopy = JNI_TRUE;
2420 }
2421 }
2422 }
2423 HOTSPOT_JNI_GETSTRINGUTFCHARS_RETURN(result);
2424 return result;
2425 JNI_END
2426
2427
2428 JNI_LEAF(void, jni_ReleaseStringUTFChars(JNIEnv *env, jstring str, const char *chars))
2429 JNIWrapper("ReleaseStringUTFChars");
2430 HOTSPOT_JNI_RELEASESTRINGUTFCHARS_ENTRY(env, str, (char *) chars);
2431 if (chars != NULL) {
2432 FreeHeap((char*) chars);
2433 }
2434 HOTSPOT_JNI_RELEASESTRINGUTFCHARS_RETURN();
2435 JNI_END
2436
2437
2438 JNI_ENTRY_NO_PRESERVE(jsize, jni_GetArrayLength(JNIEnv *env, jarray array))
2439 JNIWrapper("GetArrayLength");
2440 HOTSPOT_JNI_GETARRAYLENGTH_ENTRY(env, array);
2441 arrayOop a = arrayOop(JNIHandles::resolve_non_null(array));
2442 assert(a->is_array(), "must be array");
2443 jsize ret = a->length();
2444 HOTSPOT_JNI_GETARRAYLENGTH_RETURN(ret);
2445 return ret;
2446 JNI_END
2447
2448
2449 //
2450 // Object Array Operations
2451 //
2452
2453 DT_RETURN_MARK_DECL(NewObjectArray, jobjectArray
2454 , HOTSPOT_JNI_NEWOBJECTARRAY_RETURN(_ret_ref));
2455
2456 JNI_ENTRY(jobjectArray, jni_NewObjectArray(JNIEnv *env, jsize length, jclass elementClass, jobject initialElement))
2457 JNIWrapper("NewObjectArray");
2458 HOTSPOT_JNI_NEWOBJECTARRAY_ENTRY(env, length, elementClass, initialElement);
2459 jobjectArray ret = NULL;
2460 DT_RETURN_MARK(NewObjectArray, jobjectArray, (const jobjectArray&)ret);
2461 Klass* ek = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(elementClass));
2462 Klass* ak = ek->array_klass(CHECK_NULL);
2463 ObjArrayKlass::cast(ak)->initialize(CHECK_NULL);
2464 objArrayOop result = ObjArrayKlass::cast(ak)->allocate(length, CHECK_NULL);
2465 oop initial_value = JNIHandles::resolve(initialElement);
2466 if (initial_value != NULL) { // array already initialized with NULL
2467 for (int index = 0; index < length; index++) {
2468 result->obj_at_put(index, initial_value);
2469 }
2470 }
2471 ret = (jobjectArray) JNIHandles::make_local(env, result);
2472 return ret;
2473 JNI_END
2474
2475 DT_RETURN_MARK_DECL(GetObjectArrayElement, jobject
2476 , HOTSPOT_JNI_GETOBJECTARRAYELEMENT_RETURN(_ret_ref));
2477
2478 JNI_ENTRY(jobject, jni_GetObjectArrayElement(JNIEnv *env, jobjectArray array, jsize index))
2479 JNIWrapper("GetObjectArrayElement");
2480 HOTSPOT_JNI_GETOBJECTARRAYELEMENT_ENTRY(env, array, index);
2481 jobject ret = NULL;
2482 DT_RETURN_MARK(GetObjectArrayElement, jobject, (const jobject&)ret);
2483 objArrayOop a = objArrayOop(JNIHandles::resolve_non_null(array));
2484 if (a->is_within_bounds(index)) {
2485 ret = JNIHandles::make_local(env, a->obj_at(index));
2486 return ret;
2487 } else {
2488 ResourceMark rm(THREAD);
2489 stringStream ss;
2490 ss.print("Index %d out of bounds for length %d", index, a->length());
2491 THROW_MSG_0(vmSymbols::java_lang_ArrayIndexOutOfBoundsException(), ss.as_string());
2492 }
2493 JNI_END
2494
2495 DT_VOID_RETURN_MARK_DECL(SetObjectArrayElement
2496 , HOTSPOT_JNI_SETOBJECTARRAYELEMENT_RETURN());
2497
2498 JNI_ENTRY(void, jni_SetObjectArrayElement(JNIEnv *env, jobjectArray array, jsize index, jobject value))
2499 JNIWrapper("SetObjectArrayElement");
2500 HOTSPOT_JNI_SETOBJECTARRAYELEMENT_ENTRY(env, array, index, value);
2501 DT_VOID_RETURN_MARK(SetObjectArrayElement);
2502
2503 objArrayOop a = objArrayOop(JNIHandles::resolve_non_null(array));
2504 oop v = JNIHandles::resolve(value);
2505 if (a->is_within_bounds(index)) {
2506 if (v == NULL || v->is_a(ObjArrayKlass::cast(a->klass())->element_klass())) {
2507 a->obj_at_put(index, v);
2508 } else {
2509 ResourceMark rm(THREAD);
2510 stringStream ss;
2511 Klass *bottom_kl = ObjArrayKlass::cast(a->klass())->bottom_klass();
2512 ss.print("type mismatch: can not store %s to %s[%d]",
2513 v->klass()->external_name(),
2514 bottom_kl->is_typeArray_klass() ? type2name_tab[ArrayKlass::cast(bottom_kl)->element_type()] : bottom_kl->external_name(),
2515 index);
2516 for (int dims = ArrayKlass::cast(a->klass())->dimension(); dims > 1; --dims) {
2517 ss.print("[]");
2518 }
2519 THROW_MSG(vmSymbols::java_lang_ArrayStoreException(), ss.as_string());
2520 }
2521 } else {
2522 ResourceMark rm(THREAD);
2523 stringStream ss;
2524 ss.print("Index %d out of bounds for length %d", index, a->length());
2525 THROW_MSG(vmSymbols::java_lang_ArrayIndexOutOfBoundsException(), ss.as_string());
2526 }
2527 JNI_END
2528
2529
2530
2531 #define DEFINE_NEWSCALARARRAY(Return,Allocator,Result \
2532 ,EntryProbe,ReturnProbe) \
2533 \
2534 DT_RETURN_MARK_DECL(New##Result##Array, Return \
2535 , ReturnProbe); \
2536 \
2537 JNI_ENTRY(Return, \
2538 jni_New##Result##Array(JNIEnv *env, jsize len)) \
2539 JNIWrapper("New" XSTR(Result) "Array"); \
2540 EntryProbe; \
2541 Return ret = NULL;\
2542 DT_RETURN_MARK(New##Result##Array, Return, (const Return&)ret);\
2543 \
2544 oop obj= oopFactory::Allocator(len, CHECK_NULL); \
2545 ret = (Return) JNIHandles::make_local(env, obj); \
2546 return ret;\
2547 JNI_END
2548
2549 DEFINE_NEWSCALARARRAY(jbooleanArray, new_boolArray, Boolean,
2550 HOTSPOT_JNI_NEWBOOLEANARRAY_ENTRY(env, len),
2551 HOTSPOT_JNI_NEWBOOLEANARRAY_RETURN(_ret_ref))
2552 DEFINE_NEWSCALARARRAY(jbyteArray, new_byteArray, Byte,
2553 HOTSPOT_JNI_NEWBYTEARRAY_ENTRY(env, len),
2554 HOTSPOT_JNI_NEWBYTEARRAY_RETURN(_ret_ref))
2555 DEFINE_NEWSCALARARRAY(jshortArray, new_shortArray, Short,
2556 HOTSPOT_JNI_NEWSHORTARRAY_ENTRY(env, len),
2557 HOTSPOT_JNI_NEWSHORTARRAY_RETURN(_ret_ref))
2558 DEFINE_NEWSCALARARRAY(jcharArray, new_charArray, Char,
2559 HOTSPOT_JNI_NEWCHARARRAY_ENTRY(env, len),
2560 HOTSPOT_JNI_NEWCHARARRAY_RETURN(_ret_ref))
2561 DEFINE_NEWSCALARARRAY(jintArray, new_intArray, Int,
2562 HOTSPOT_JNI_NEWINTARRAY_ENTRY(env, len),
2563 HOTSPOT_JNI_NEWINTARRAY_RETURN(_ret_ref))
2564 DEFINE_NEWSCALARARRAY(jlongArray, new_longArray, Long,
2565 HOTSPOT_JNI_NEWLONGARRAY_ENTRY(env, len),
2566 HOTSPOT_JNI_NEWLONGARRAY_RETURN(_ret_ref))
2567 DEFINE_NEWSCALARARRAY(jfloatArray, new_floatArray, Float,
2568 HOTSPOT_JNI_NEWFLOATARRAY_ENTRY(env, len),
2569 HOTSPOT_JNI_NEWFLOATARRAY_RETURN(_ret_ref))
2570 DEFINE_NEWSCALARARRAY(jdoubleArray, new_doubleArray, Double,
2571 HOTSPOT_JNI_NEWDOUBLEARRAY_ENTRY(env, len),
2572 HOTSPOT_JNI_NEWDOUBLEARRAY_RETURN(_ret_ref))
2573
2574 // Return an address which will fault if the caller writes to it.
2575
2576 static char* get_bad_address() {
2577 static char* bad_address = NULL;
2578 if (bad_address == NULL) {
2579 size_t size = os::vm_allocation_granularity();
2580 bad_address = os::reserve_memory(size);
2581 if (bad_address != NULL) {
2582 os::protect_memory(bad_address, size, os::MEM_PROT_READ,
2583 /*is_committed*/false);
2584 MemTracker::record_virtual_memory_type((void*)bad_address, mtInternal);
2585 }
2586 }
2587 return bad_address;
2588 }
2589
2590
2591
2592 #define DEFINE_GETSCALARARRAYELEMENTS(ElementTag,ElementType,Result, Tag \
2593 , EntryProbe, ReturnProbe) \
2594 \
2595 JNI_ENTRY_NO_PRESERVE(ElementType*, \
2596 jni_Get##Result##ArrayElements(JNIEnv *env, ElementType##Array array, jboolean *isCopy)) \
2597 JNIWrapper("Get" XSTR(Result) "ArrayElements"); \
2598 EntryProbe; \
2599 /* allocate an chunk of memory in c land */ \
2600 typeArrayOop a = typeArrayOop(JNIHandles::resolve_non_null(array)); \
2601 ElementType* result; \
2602 int len = a->length(); \
2603 if (len == 0) { \
2604 if (isCopy != NULL) { \
2605 *isCopy = JNI_FALSE; \
2606 } \
2607 /* Empty array: legal but useless, can't return NULL. \
2608 * Return a pointer to something useless. \
2609 * Avoid asserts in typeArrayOop. */ \
2610 result = (ElementType*)get_bad_address(); \
2611 } else { \
2612 /* JNI Specification states return NULL on OOM */ \
2613 result = NEW_C_HEAP_ARRAY_RETURN_NULL(ElementType, len, mtInternal); \
2614 if (result != NULL) { \
2615 /* copy the array to the c chunk */ \
2616 ArrayAccess<>::arraycopy_to_native(a, typeArrayOopDesc::element_offset<ElementType>(0), \
2617 result, len); \
2618 if (isCopy) { \
2619 *isCopy = JNI_TRUE; \
2620 } \
2621 } \
2622 } \
2623 ReturnProbe; \
2624 return result; \
2625 JNI_END
2626
2627 DEFINE_GETSCALARARRAYELEMENTS(T_BOOLEAN, jboolean, Boolean, bool
2628 , HOTSPOT_JNI_GETBOOLEANARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy),
2629 HOTSPOT_JNI_GETBOOLEANARRAYELEMENTS_RETURN((uintptr_t*)result))
2630 DEFINE_GETSCALARARRAYELEMENTS(T_BYTE, jbyte, Byte, byte
2631 , HOTSPOT_JNI_GETBYTEARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy),
2632 HOTSPOT_JNI_GETBYTEARRAYELEMENTS_RETURN((char*)result))
2633 DEFINE_GETSCALARARRAYELEMENTS(T_SHORT, jshort, Short, short
2634 , HOTSPOT_JNI_GETSHORTARRAYELEMENTS_ENTRY(env, (uint16_t*) array, (uintptr_t *) isCopy),
2635 HOTSPOT_JNI_GETSHORTARRAYELEMENTS_RETURN((uint16_t*)result))
2636 DEFINE_GETSCALARARRAYELEMENTS(T_CHAR, jchar, Char, char
2637 , HOTSPOT_JNI_GETCHARARRAYELEMENTS_ENTRY(env, (uint16_t*) array, (uintptr_t *) isCopy),
2638 HOTSPOT_JNI_GETCHARARRAYELEMENTS_RETURN(result))
2639 DEFINE_GETSCALARARRAYELEMENTS(T_INT, jint, Int, int
2640 , HOTSPOT_JNI_GETINTARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy),
2641 HOTSPOT_JNI_GETINTARRAYELEMENTS_RETURN((uint32_t*)result))
2642 DEFINE_GETSCALARARRAYELEMENTS(T_LONG, jlong, Long, long
2643 , HOTSPOT_JNI_GETLONGARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy),
2644 HOTSPOT_JNI_GETLONGARRAYELEMENTS_RETURN(((uintptr_t*)result)))
2645 // Float and double probes don't return value because dtrace doesn't currently support it
2646 DEFINE_GETSCALARARRAYELEMENTS(T_FLOAT, jfloat, Float, float
2647 , HOTSPOT_JNI_GETFLOATARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy),
2648 HOTSPOT_JNI_GETFLOATARRAYELEMENTS_RETURN(result))
2649 DEFINE_GETSCALARARRAYELEMENTS(T_DOUBLE, jdouble, Double, double
2650 , HOTSPOT_JNI_GETDOUBLEARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy),
2651 HOTSPOT_JNI_GETDOUBLEARRAYELEMENTS_RETURN(result))
2652
2653
2654 #define DEFINE_RELEASESCALARARRAYELEMENTS(ElementTag,ElementType,Result,Tag \
2655 , EntryProbe, ReturnProbe);\
2656 \
2657 JNI_ENTRY_NO_PRESERVE(void, \
2658 jni_Release##Result##ArrayElements(JNIEnv *env, ElementType##Array array, \
2659 ElementType *buf, jint mode)) \
2660 JNIWrapper("Release" XSTR(Result) "ArrayElements"); \
2661 EntryProbe; \
2662 typeArrayOop a = typeArrayOop(JNIHandles::resolve_non_null(array)); \
2663 int len = a->length(); \
2664 if (len != 0) { /* Empty array: nothing to free or copy. */ \
2665 if ((mode == 0) || (mode == JNI_COMMIT)) { \
2666 ArrayAccess<>::arraycopy_from_native(buf, a, typeArrayOopDesc::element_offset<ElementType>(0), len); \
2667 } \
2668 if ((mode == 0) || (mode == JNI_ABORT)) { \
2669 FreeHeap(buf); \
2670 } \
2671 } \
2672 ReturnProbe; \
2673 JNI_END
2674
2675 DEFINE_RELEASESCALARARRAYELEMENTS(T_BOOLEAN, jboolean, Boolean, bool
2676 , HOTSPOT_JNI_RELEASEBOOLEANARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) buf, mode),
2677 HOTSPOT_JNI_RELEASEBOOLEANARRAYELEMENTS_RETURN())
2678 DEFINE_RELEASESCALARARRAYELEMENTS(T_BYTE, jbyte, Byte, byte
2679 , HOTSPOT_JNI_RELEASEBYTEARRAYELEMENTS_ENTRY(env, array, (char *) buf, mode),
2680 HOTSPOT_JNI_RELEASEBYTEARRAYELEMENTS_RETURN())
2681 DEFINE_RELEASESCALARARRAYELEMENTS(T_SHORT, jshort, Short, short
2682 , HOTSPOT_JNI_RELEASESHORTARRAYELEMENTS_ENTRY(env, array, (uint16_t *) buf, mode),
2683 HOTSPOT_JNI_RELEASESHORTARRAYELEMENTS_RETURN())
2684 DEFINE_RELEASESCALARARRAYELEMENTS(T_CHAR, jchar, Char, char
2685 , HOTSPOT_JNI_RELEASECHARARRAYELEMENTS_ENTRY(env, array, (uint16_t *) buf, mode),
2686 HOTSPOT_JNI_RELEASECHARARRAYELEMENTS_RETURN())
2687 DEFINE_RELEASESCALARARRAYELEMENTS(T_INT, jint, Int, int
2688 , HOTSPOT_JNI_RELEASEINTARRAYELEMENTS_ENTRY(env, array, (uint32_t *) buf, mode),
2689 HOTSPOT_JNI_RELEASEINTARRAYELEMENTS_RETURN())
2690 DEFINE_RELEASESCALARARRAYELEMENTS(T_LONG, jlong, Long, long
2691 , HOTSPOT_JNI_RELEASELONGARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) buf, mode),
2692 HOTSPOT_JNI_RELEASELONGARRAYELEMENTS_RETURN())
2693 DEFINE_RELEASESCALARARRAYELEMENTS(T_FLOAT, jfloat, Float, float
2694 , HOTSPOT_JNI_RELEASEFLOATARRAYELEMENTS_ENTRY(env, array, (float *) buf, mode),
2695 HOTSPOT_JNI_RELEASEFLOATARRAYELEMENTS_RETURN())
2696 DEFINE_RELEASESCALARARRAYELEMENTS(T_DOUBLE, jdouble, Double, double
2697 , HOTSPOT_JNI_RELEASEDOUBLEARRAYELEMENTS_ENTRY(env, array, (double *) buf, mode),
2698 HOTSPOT_JNI_RELEASEDOUBLEARRAYELEMENTS_RETURN())
2699
2700 static void check_bounds(jsize start, jsize copy_len, jsize array_len, TRAPS) {
2701 ResourceMark rm(THREAD);
2702 if (copy_len < 0) {
2703 stringStream ss;
2704 ss.print("Length %d is negative", copy_len);
2705 THROW_MSG(vmSymbols::java_lang_ArrayIndexOutOfBoundsException(), ss.as_string());
2706 } else if (start < 0 || (start > array_len - copy_len)) {
2707 stringStream ss;
2708 ss.print("Array region %d.." INT64_FORMAT " out of bounds for length %d",
2709 start, (int64_t)start+(int64_t)copy_len, array_len);
2710 THROW_MSG(vmSymbols::java_lang_ArrayIndexOutOfBoundsException(), ss.as_string());
2711 }
2712 }
2713
2714 #define DEFINE_GETSCALARARRAYREGION(ElementTag,ElementType,Result, Tag \
2715 , EntryProbe, ReturnProbe); \
2716 DT_VOID_RETURN_MARK_DECL(Get##Result##ArrayRegion \
2717 , ReturnProbe); \
2718 \
2719 JNI_ENTRY(void, \
2720 jni_Get##Result##ArrayRegion(JNIEnv *env, ElementType##Array array, jsize start, \
2721 jsize len, ElementType *buf)) \
2722 JNIWrapper("Get" XSTR(Result) "ArrayRegion"); \
2723 EntryProbe; \
2724 DT_VOID_RETURN_MARK(Get##Result##ArrayRegion); \
2725 typeArrayOop src = typeArrayOop(JNIHandles::resolve_non_null(array)); \
2726 check_bounds(start, len, src->length(), CHECK); \
2727 if (len > 0) { \
2728 ArrayAccess<>::arraycopy_to_native(src, typeArrayOopDesc::element_offset<ElementType>(start), buf, len); \
2729 } \
2730 JNI_END
2731
2732 DEFINE_GETSCALARARRAYREGION(T_BOOLEAN, jboolean,Boolean, bool
2733 , HOTSPOT_JNI_GETBOOLEANARRAYREGION_ENTRY(env, array, start, len, (uintptr_t *) buf),
2734 HOTSPOT_JNI_GETBOOLEANARRAYREGION_RETURN());
2735 DEFINE_GETSCALARARRAYREGION(T_BYTE, jbyte, Byte, byte
2736 , HOTSPOT_JNI_GETBYTEARRAYREGION_ENTRY(env, array, start, len, (char *) buf),
2737 HOTSPOT_JNI_GETBYTEARRAYREGION_RETURN());
2738 DEFINE_GETSCALARARRAYREGION(T_SHORT, jshort, Short, short
2739 , HOTSPOT_JNI_GETSHORTARRAYREGION_ENTRY(env, array, start, len, (uint16_t *) buf),
2740 HOTSPOT_JNI_GETSHORTARRAYREGION_RETURN());
2741 DEFINE_GETSCALARARRAYREGION(T_CHAR, jchar, Char, char
2742 , HOTSPOT_JNI_GETCHARARRAYREGION_ENTRY(env, array, start, len, (uint16_t*) buf),
2743 HOTSPOT_JNI_GETCHARARRAYREGION_RETURN());
2744 DEFINE_GETSCALARARRAYREGION(T_INT, jint, Int, int
2745 , HOTSPOT_JNI_GETINTARRAYREGION_ENTRY(env, array, start, len, (uint32_t*) buf),
2746 HOTSPOT_JNI_GETINTARRAYREGION_RETURN());
2747 DEFINE_GETSCALARARRAYREGION(T_LONG, jlong, Long, long
2748 , HOTSPOT_JNI_GETLONGARRAYREGION_ENTRY(env, array, start, len, (uintptr_t *) buf),
2749 HOTSPOT_JNI_GETLONGARRAYREGION_RETURN());
2750 DEFINE_GETSCALARARRAYREGION(T_FLOAT, jfloat, Float, float
2751 , HOTSPOT_JNI_GETFLOATARRAYREGION_ENTRY(env, array, start, len, (float *) buf),
2752 HOTSPOT_JNI_GETFLOATARRAYREGION_RETURN());
2753 DEFINE_GETSCALARARRAYREGION(T_DOUBLE, jdouble, Double, double
2754 , HOTSPOT_JNI_GETDOUBLEARRAYREGION_ENTRY(env, array, start, len, (double *) buf),
2755 HOTSPOT_JNI_GETDOUBLEARRAYREGION_RETURN());
2756
2757
2758 #define DEFINE_SETSCALARARRAYREGION(ElementTag,ElementType,Result, Tag \
2759 , EntryProbe, ReturnProbe); \
2760 DT_VOID_RETURN_MARK_DECL(Set##Result##ArrayRegion \
2761 ,ReturnProbe); \
2762 \
2763 JNI_ENTRY(void, \
2764 jni_Set##Result##ArrayRegion(JNIEnv *env, ElementType##Array array, jsize start, \
2765 jsize len, const ElementType *buf)) \
2766 JNIWrapper("Set" XSTR(Result) "ArrayRegion"); \
2767 EntryProbe; \
2768 DT_VOID_RETURN_MARK(Set##Result##ArrayRegion); \
2769 typeArrayOop dst = typeArrayOop(JNIHandles::resolve_non_null(array)); \
2770 check_bounds(start, len, dst->length(), CHECK); \
2771 if (len > 0) { \
2772 ArrayAccess<>::arraycopy_from_native(buf, dst, typeArrayOopDesc::element_offset<ElementType>(start), len); \
2773 } \
2774 JNI_END
2775
2776 DEFINE_SETSCALARARRAYREGION(T_BOOLEAN, jboolean, Boolean, bool
2777 , HOTSPOT_JNI_SETBOOLEANARRAYREGION_ENTRY(env, array, start, len, (uintptr_t *)buf),
2778 HOTSPOT_JNI_SETBOOLEANARRAYREGION_RETURN())
2779 DEFINE_SETSCALARARRAYREGION(T_BYTE, jbyte, Byte, byte
2780 , HOTSPOT_JNI_SETBYTEARRAYREGION_ENTRY(env, array, start, len, (char *) buf),
2781 HOTSPOT_JNI_SETBYTEARRAYREGION_RETURN())
2782 DEFINE_SETSCALARARRAYREGION(T_SHORT, jshort, Short, short
2783 , HOTSPOT_JNI_SETSHORTARRAYREGION_ENTRY(env, array, start, len, (uint16_t *) buf),
2784 HOTSPOT_JNI_SETSHORTARRAYREGION_RETURN())
2785 DEFINE_SETSCALARARRAYREGION(T_CHAR, jchar, Char, char
2786 , HOTSPOT_JNI_SETCHARARRAYREGION_ENTRY(env, array, start, len, (uint16_t *) buf),
2787 HOTSPOT_JNI_SETCHARARRAYREGION_RETURN())
2788 DEFINE_SETSCALARARRAYREGION(T_INT, jint, Int, int
2789 , HOTSPOT_JNI_SETINTARRAYREGION_ENTRY(env, array, start, len, (uint32_t *) buf),
2790 HOTSPOT_JNI_SETINTARRAYREGION_RETURN())
2791 DEFINE_SETSCALARARRAYREGION(T_LONG, jlong, Long, long
2792 , HOTSPOT_JNI_SETLONGARRAYREGION_ENTRY(env, array, start, len, (uintptr_t *) buf),
2793 HOTSPOT_JNI_SETLONGARRAYREGION_RETURN())
2794 DEFINE_SETSCALARARRAYREGION(T_FLOAT, jfloat, Float, float
2795 , HOTSPOT_JNI_SETFLOATARRAYREGION_ENTRY(env, array, start, len, (float *) buf),
2796 HOTSPOT_JNI_SETFLOATARRAYREGION_RETURN())
2797 DEFINE_SETSCALARARRAYREGION(T_DOUBLE, jdouble, Double, double
2798 , HOTSPOT_JNI_SETDOUBLEARRAYREGION_ENTRY(env, array, start, len, (double *) buf),
2799 HOTSPOT_JNI_SETDOUBLEARRAYREGION_RETURN())
2800
2801
2802 DT_RETURN_MARK_DECL(RegisterNatives, jint
2803 , HOTSPOT_JNI_REGISTERNATIVES_RETURN(_ret_ref));
2804
2805 JNI_ENTRY(jint, jni_RegisterNatives(JNIEnv *env, jclass clazz,
2806 const JNINativeMethod *methods,
2807 jint nMethods))
2808 JNIWrapper("RegisterNatives");
2809 HOTSPOT_JNI_REGISTERNATIVES_ENTRY(env, clazz, (void *) methods, nMethods);
2810 jint ret = 0;
2811 DT_RETURN_MARK(RegisterNatives, jint, (const jint&)ret);
2812
2813 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz));
2814
2815 // There are no restrictions on native code registering native methods,
2816 // which allows agents to redefine the bindings to native methods, however
2817 // we issue a warning if any code running outside of the boot/platform
2818 // loader is rebinding any native methods in classes loaded by the
2819 // boot/platform loader that are in named modules. That will catch changes
2820 // to platform classes while excluding classes added to the bootclasspath.
2821 bool do_warning = false;
2822
2823 // Only instanceKlasses can have native methods
2824 if (k->is_instance_klass()) {
2825 oop cl = k->class_loader();
2826 InstanceKlass* ik = InstanceKlass::cast(k);
2827 // Check for a platform class
2828 if ((cl == NULL || SystemDictionary::is_platform_class_loader(cl)) &&
2829 ik->module()->is_named()) {
2830 Klass* caller = thread->security_get_caller_class(1);
2831 // If no caller class, or caller class has a different loader, then
2832 // issue a warning below.
2833 do_warning = (caller == NULL) || caller->class_loader() != cl;
2834 }
2835 }
2836
2837
2838 for (int index = 0; index < nMethods; index++) {
2839 const char* meth_name = methods[index].name;
2840 const char* meth_sig = methods[index].signature;
2841 int meth_name_len = (int)strlen(meth_name);
2842
2843 // The class should have been loaded (we have an instance of the class
2844 // passed in) so the method and signature should already be in the symbol
2845 // table. If they're not there, the method doesn't exist.
2846 TempNewSymbol name = SymbolTable::probe(meth_name, meth_name_len);
2847 TempNewSymbol signature = SymbolTable::probe(meth_sig, (int)strlen(meth_sig));
2848
2849 if (name == NULL || signature == NULL) {
2850 ResourceMark rm(THREAD);
2851 stringStream st;
2852 st.print("Method %s.%s%s not found", k->external_name(), meth_name, meth_sig);
2853 // Must return negative value on failure
2854 THROW_MSG_(vmSymbols::java_lang_NoSuchMethodError(), st.as_string(), -1);
2855 }
2856
2857 if (do_warning) {
2858 ResourceMark rm(THREAD);
2859 log_warning(jni, resolve)("Re-registering of platform native method: %s.%s%s "
2860 "from code in a different classloader", k->external_name(), meth_name, meth_sig);
2861 }
2862
2863 bool res = Method::register_native(k, name, signature,
2864 (address) methods[index].fnPtr, THREAD);
2865 if (!res) {
2866 ret = -1;
2867 break;
2868 }
2869 }
2870 return ret;
2871 JNI_END
2872
2873
2874 JNI_ENTRY(jint, jni_UnregisterNatives(JNIEnv *env, jclass clazz))
2875 JNIWrapper("UnregisterNatives");
2876 HOTSPOT_JNI_UNREGISTERNATIVES_ENTRY(env, clazz);
2877 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz));
2878 //%note jni_2
2879 if (k->is_instance_klass()) {
2880 for (int index = 0; index < InstanceKlass::cast(k)->methods()->length(); index++) {
2881 Method* m = InstanceKlass::cast(k)->methods()->at(index);
2882 if (m->is_native()) {
2883 m->clear_native_function();
2884 m->set_signature_handler(NULL);
2885 }
2886 }
2887 }
2888 HOTSPOT_JNI_UNREGISTERNATIVES_RETURN(0);
2889 return 0;
2890 JNI_END
2891
2892 //
2893 // Monitor functions
2894 //
2895
2896 DT_RETURN_MARK_DECL(MonitorEnter, jint
2897 , HOTSPOT_JNI_MONITORENTER_RETURN(_ret_ref));
2898
2899 JNI_ENTRY(jint, jni_MonitorEnter(JNIEnv *env, jobject jobj))
2900 HOTSPOT_JNI_MONITORENTER_ENTRY(env, jobj);
2901 jint ret = JNI_ERR;
2902 DT_RETURN_MARK(MonitorEnter, jint, (const jint&)ret);
2903
2904 // If the object is null, we can't do anything with it
2905 if (jobj == NULL) {
2906 THROW_(vmSymbols::java_lang_NullPointerException(), JNI_ERR);
2907 }
2908
2909 Handle obj(thread, JNIHandles::resolve_non_null(jobj));
2910 ObjectSynchronizer::jni_enter(obj, CHECK_(JNI_ERR));
2911 ret = JNI_OK;
2912 return ret;
2913 JNI_END
2914
2915 DT_RETURN_MARK_DECL(MonitorExit, jint
2916 , HOTSPOT_JNI_MONITOREXIT_RETURN(_ret_ref));
2917
2918 JNI_ENTRY(jint, jni_MonitorExit(JNIEnv *env, jobject jobj))
2919 HOTSPOT_JNI_MONITOREXIT_ENTRY(env, jobj);
2920 jint ret = JNI_ERR;
2921 DT_RETURN_MARK(MonitorExit, jint, (const jint&)ret);
2922
2923 // Don't do anything with a null object
2924 if (jobj == NULL) {
2925 THROW_(vmSymbols::java_lang_NullPointerException(), JNI_ERR);
2926 }
2927
2928 Handle obj(THREAD, JNIHandles::resolve_non_null(jobj));
2929 ObjectSynchronizer::jni_exit(obj(), CHECK_(JNI_ERR));
2930
2931 ret = JNI_OK;
2932 return ret;
2933 JNI_END
2934
2935 //
2936 // Extensions
2937 //
2938
2939 DT_VOID_RETURN_MARK_DECL(GetStringRegion
2940 , HOTSPOT_JNI_GETSTRINGREGION_RETURN());
2941
2942 JNI_ENTRY(void, jni_GetStringRegion(JNIEnv *env, jstring string, jsize start, jsize len, jchar *buf))
2943 JNIWrapper("GetStringRegion");
2944 HOTSPOT_JNI_GETSTRINGREGION_ENTRY(env, string, start, len, buf);
2945 DT_VOID_RETURN_MARK(GetStringRegion);
2946 oop s = JNIHandles::resolve_non_null(string);
2947 typeArrayOop s_value = java_lang_String::value(s);
2948 int s_len = java_lang_String::length(s, s_value);
2949 if (start < 0 || len < 0 || start > s_len - len) {
2950 THROW(vmSymbols::java_lang_StringIndexOutOfBoundsException());
2951 } else {
2952 if (len > 0) {
2953 bool is_latin1 = java_lang_String::is_latin1(s);
2954 if (!is_latin1) {
2955 ArrayAccess<>::arraycopy_to_native(s_value, typeArrayOopDesc::element_offset<jchar>(start),
2956 buf, len);
2957 } else {
2958 for (int i = 0; i < len; i++) {
2959 buf[i] = ((jchar) s_value->byte_at(i + start)) & 0xff;
2960 }
2961 }
2962 }
2963 }
2964 JNI_END
2965
2966 DT_VOID_RETURN_MARK_DECL(GetStringUTFRegion
2967 , HOTSPOT_JNI_GETSTRINGUTFREGION_RETURN());
2968
2969 JNI_ENTRY(void, jni_GetStringUTFRegion(JNIEnv *env, jstring string, jsize start, jsize len, char *buf))
2970 JNIWrapper("GetStringUTFRegion");
2971 HOTSPOT_JNI_GETSTRINGUTFREGION_ENTRY(env, string, start, len, buf);
2972 DT_VOID_RETURN_MARK(GetStringUTFRegion);
2973 oop s = JNIHandles::resolve_non_null(string);
2974 typeArrayOop s_value = java_lang_String::value(s);
2975 int s_len = java_lang_String::length(s, s_value);
2976 if (start < 0 || len < 0 || start > s_len - len) {
2977 THROW(vmSymbols::java_lang_StringIndexOutOfBoundsException());
2978 } else {
2979 //%note jni_7
2980 if (len > 0) {
2981 // Assume the buffer is large enough as the JNI spec. does not require user error checking
2982 java_lang_String::as_utf8_string(s, s_value, start, len, buf, INT_MAX);
2983 // as_utf8_string null-terminates the result string
2984 } else {
2985 // JDK null-terminates the buffer even in len is zero
2986 if (buf != NULL) {
2987 buf[0] = 0;
2988 }
2989 }
2990 }
2991 JNI_END
2992
2993 static oop lock_gc_or_pin_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()->pin_object(thread, o);
2997 } else {
2998 GCLocker::lock_critical(thread);
2999 return JNIHandles::resolve_non_null(obj);
3000 }
3001 }
3002
3003 static void unlock_gc_or_unpin_object(JavaThread* thread, jobject obj) {
3004 if (Universe::heap()->supports_object_pinning()) {
3005 const oop o = JNIHandles::resolve_non_null(obj);
3006 return Universe::heap()->unpin_object(thread, o);
3007 } else {
3008 GCLocker::unlock_critical(thread);
3009 }
3010 }
3011
3012 JNI_ENTRY(void*, jni_GetPrimitiveArrayCritical(JNIEnv *env, jarray array, jboolean *isCopy))
3013 JNIWrapper("GetPrimitiveArrayCritical");
3014 HOTSPOT_JNI_GETPRIMITIVEARRAYCRITICAL_ENTRY(env, array, (uintptr_t *) isCopy);
3015 if (isCopy != NULL) {
3016 *isCopy = JNI_FALSE;
3017 }
3018 oop a = lock_gc_or_pin_object(thread, array);
3019 assert(a->is_array(), "just checking");
3020 BasicType type;
3021 if (a->is_objArray()) {
3022 type = T_OBJECT;
3023 } else {
3024 type = TypeArrayKlass::cast(a->klass())->element_type();
3025 }
3026 void* ret = arrayOop(a)->base(type);
3027 HOTSPOT_JNI_GETPRIMITIVEARRAYCRITICAL_RETURN(ret);
3028 return ret;
3029 JNI_END
3030
3031
3032 JNI_ENTRY(void, jni_ReleasePrimitiveArrayCritical(JNIEnv *env, jarray array, void *carray, jint mode))
3033 JNIWrapper("ReleasePrimitiveArrayCritical");
3034 HOTSPOT_JNI_RELEASEPRIMITIVEARRAYCRITICAL_ENTRY(env, array, carray, mode);
3035 unlock_gc_or_unpin_object(thread, array);
3036 HOTSPOT_JNI_RELEASEPRIMITIVEARRAYCRITICAL_RETURN();
3037 JNI_END
3038
3039
3040 JNI_ENTRY(const jchar*, jni_GetStringCritical(JNIEnv *env, jstring string, jboolean *isCopy))
3041 JNIWrapper("GetStringCritical");
3042 HOTSPOT_JNI_GETSTRINGCRITICAL_ENTRY(env, string, (uintptr_t *) isCopy);
3043 oop s = lock_gc_or_pin_object(thread, string);
3044 typeArrayOop s_value = java_lang_String::value(s);
3045 bool is_latin1 = java_lang_String::is_latin1(s);
3046 if (isCopy != NULL) {
3047 *isCopy = is_latin1 ? JNI_TRUE : JNI_FALSE;
3048 }
3049 jchar* ret;
3050 if (!is_latin1) {
3051 ret = (jchar*) s_value->base(T_CHAR);
3052 } else {
3053 // Inflate latin1 encoded string to UTF16
3054 int s_len = java_lang_String::length(s, s_value);
3055 ret = NEW_C_HEAP_ARRAY_RETURN_NULL(jchar, s_len + 1, mtInternal); // add one for zero termination
3056 /* JNI Specification states return NULL on OOM */
3057 if (ret != NULL) {
3058 for (int i = 0; i < s_len; i++) {
3059 ret[i] = ((jchar) s_value->byte_at(i)) & 0xff;
3060 }
3061 ret[s_len] = 0;
3062 }
3063 }
3064 HOTSPOT_JNI_GETSTRINGCRITICAL_RETURN((uint16_t *) ret);
3065 return ret;
3066 JNI_END
3067
3068
3069 JNI_ENTRY(void, jni_ReleaseStringCritical(JNIEnv *env, jstring str, const jchar *chars))
3070 JNIWrapper("ReleaseStringCritical");
3071 HOTSPOT_JNI_RELEASESTRINGCRITICAL_ENTRY(env, str, (uint16_t *) chars);
3072 // The str and chars arguments are ignored for UTF16 strings
3073 oop s = JNIHandles::resolve_non_null(str);
3074 bool is_latin1 = java_lang_String::is_latin1(s);
3075 if (is_latin1) {
3076 // For latin1 string, free jchar array allocated by earlier call to GetStringCritical.
3077 // This assumes that ReleaseStringCritical bookends GetStringCritical.
3078 FREE_C_HEAP_ARRAY(jchar, chars);
3079 }
3080 unlock_gc_or_unpin_object(thread, str);
3081 HOTSPOT_JNI_RELEASESTRINGCRITICAL_RETURN();
3082 JNI_END
3083
3084
3085 JNI_ENTRY(jweak, jni_NewWeakGlobalRef(JNIEnv *env, jobject ref))
3086 JNIWrapper("jni_NewWeakGlobalRef");
3087 HOTSPOT_JNI_NEWWEAKGLOBALREF_ENTRY(env, ref);
3088 Handle ref_handle(thread, JNIHandles::resolve(ref));
3089 jweak ret = JNIHandles::make_weak_global(ref_handle);
3090 HOTSPOT_JNI_NEWWEAKGLOBALREF_RETURN(ret);
3091 return ret;
3092 JNI_END
3093
3094 // Must be JNI_ENTRY (with HandleMark)
3095 JNI_ENTRY(void, jni_DeleteWeakGlobalRef(JNIEnv *env, jweak ref))
3096 JNIWrapper("jni_DeleteWeakGlobalRef");
3097 HOTSPOT_JNI_DELETEWEAKGLOBALREF_ENTRY(env, ref);
3098 JNIHandles::destroy_weak_global(ref);
3099 HOTSPOT_JNI_DELETEWEAKGLOBALREF_RETURN();
3100 JNI_END
3101
3102
3103 JNI_ENTRY_NO_PRESERVE(jboolean, jni_ExceptionCheck(JNIEnv *env))
3104 JNIWrapper("jni_ExceptionCheck");
3105 HOTSPOT_JNI_EXCEPTIONCHECK_ENTRY(env);
3106 jni_check_async_exceptions(thread);
3107 jboolean ret = (thread->has_pending_exception()) ? JNI_TRUE : JNI_FALSE;
3108 HOTSPOT_JNI_EXCEPTIONCHECK_RETURN(ret);
3109 return ret;
3110 JNI_END
3111
3112
3113 // Initialization state for three routines below relating to
3114 // java.nio.DirectBuffers
3115 static int directBufferSupportInitializeStarted = 0;
3116 static volatile int directBufferSupportInitializeEnded = 0;
3117 static volatile int directBufferSupportInitializeFailed = 0;
3118 static jclass bufferClass = NULL;
3119 static jclass directBufferClass = NULL;
3120 static jclass directByteBufferClass = NULL;
3121 static jmethodID directByteBufferConstructor = NULL;
3122 static jfieldID directBufferAddressField = NULL;
3123 static jfieldID bufferCapacityField = NULL;
3124
3125 static jclass lookupOne(JNIEnv* env, const char* name, TRAPS) {
3126 Handle loader; // null (bootstrap) loader
3127 Handle protection_domain; // null protection domain
3128
3129 TempNewSymbol sym = SymbolTable::new_symbol(name);
3130 jclass result = find_class_from_class_loader(env, sym, true, loader, protection_domain, true, CHECK_NULL);
3131
3132 if (log_is_enabled(Debug, class, resolve) && result != NULL) {
3133 trace_class_resolution(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(result)));
3134 }
3135 return result;
3136 }
3137
3138 // These lookups are done with the NULL (bootstrap) ClassLoader to
3139 // circumvent any security checks that would be done by jni_FindClass.
3140 JNI_ENTRY(bool, lookupDirectBufferClasses(JNIEnv* env))
3141 {
3142 if ((bufferClass = lookupOne(env, "java/nio/Buffer", thread)) == NULL) { return false; }
3143 if ((directBufferClass = lookupOne(env, "sun/nio/ch/DirectBuffer", thread)) == NULL) { return false; }
3144 if ((directByteBufferClass = lookupOne(env, "java/nio/DirectByteBuffer", thread)) == NULL) { return false; }
3145 return true;
3146 }
3147 JNI_END
3148
3149
3150 static bool initializeDirectBufferSupport(JNIEnv* env, JavaThread* thread) {
3151 if (directBufferSupportInitializeFailed) {
3152 return false;
3153 }
3154
3155 if (Atomic::cmpxchg(&directBufferSupportInitializeStarted, 0, 1) == 0) {
3156 if (!lookupDirectBufferClasses(env)) {
3157 directBufferSupportInitializeFailed = 1;
3158 return false;
3159 }
3160
3161 // Make global references for these
3162 bufferClass = (jclass) env->NewGlobalRef(bufferClass);
3163 directBufferClass = (jclass) env->NewGlobalRef(directBufferClass);
3164 directByteBufferClass = (jclass) env->NewGlobalRef(directByteBufferClass);
3165
3166 // Get needed field and method IDs
3167 directByteBufferConstructor = env->GetMethodID(directByteBufferClass, "<init>", "(JI)V");
3168 if (env->ExceptionCheck()) {
3169 env->ExceptionClear();
3170 directBufferSupportInitializeFailed = 1;
3171 return false;
3172 }
3173 directBufferAddressField = env->GetFieldID(bufferClass, "address", "J");
3174 if (env->ExceptionCheck()) {
3175 env->ExceptionClear();
3176 directBufferSupportInitializeFailed = 1;
3177 return false;
3178 }
3179 bufferCapacityField = env->GetFieldID(bufferClass, "capacity", "I");
3180 if (env->ExceptionCheck()) {
3181 env->ExceptionClear();
3182 directBufferSupportInitializeFailed = 1;
3183 return false;
3184 }
3185
3186 if ((directByteBufferConstructor == NULL) ||
3187 (directBufferAddressField == NULL) ||
3188 (bufferCapacityField == NULL)) {
3189 directBufferSupportInitializeFailed = 1;
3190 return false;
3191 }
3192
3193 directBufferSupportInitializeEnded = 1;
3194 } else {
3195 while (!directBufferSupportInitializeEnded && !directBufferSupportInitializeFailed) {
3196 os::naked_yield();
3197 }
3198 }
3199
3200 return !directBufferSupportInitializeFailed;
3201 }
3202
3203 extern "C" jobject JNICALL jni_NewDirectByteBuffer(JNIEnv *env, void* address, jlong capacity)
3204 {
3205 // thread_from_jni_environment() will block if VM is gone.
3206 JavaThread* thread = JavaThread::thread_from_jni_environment(env);
3207
3208 JNIWrapper("jni_NewDirectByteBuffer");
3209 HOTSPOT_JNI_NEWDIRECTBYTEBUFFER_ENTRY(env, address, capacity);
3210
3211 if (!directBufferSupportInitializeEnded) {
3212 if (!initializeDirectBufferSupport(env, thread)) {
3213 HOTSPOT_JNI_NEWDIRECTBYTEBUFFER_RETURN(NULL);
3214 return NULL;
3215 }
3216 }
3217
3218 // Being paranoid about accidental sign extension on address
3219 jlong addr = (jlong) ((uintptr_t) address);
3220 // NOTE that package-private DirectByteBuffer constructor currently
3221 // takes int capacity
3222 jint cap = (jint) capacity;
3223 jobject ret = env->NewObject(directByteBufferClass, directByteBufferConstructor, addr, cap);
3224 HOTSPOT_JNI_NEWDIRECTBYTEBUFFER_RETURN(ret);
3225 return ret;
3226 }
3227
3228 DT_RETURN_MARK_DECL(GetDirectBufferAddress, void*
3229 , HOTSPOT_JNI_GETDIRECTBUFFERADDRESS_RETURN((void*) _ret_ref));
3230
3231 extern "C" void* JNICALL jni_GetDirectBufferAddress(JNIEnv *env, jobject buf)
3232 {
3233 // thread_from_jni_environment() will block if VM is gone.
3234 JavaThread* thread = JavaThread::thread_from_jni_environment(env);
3235
3236 JNIWrapper("jni_GetDirectBufferAddress");
3237 HOTSPOT_JNI_GETDIRECTBUFFERADDRESS_ENTRY(env, buf);
3238 void* ret = NULL;
3239 DT_RETURN_MARK(GetDirectBufferAddress, void*, (const void*&)ret);
3240
3241 if (!directBufferSupportInitializeEnded) {
3242 if (!initializeDirectBufferSupport(env, thread)) {
3243 return 0;
3244 }
3245 }
3246
3247 if ((buf != NULL) && (!env->IsInstanceOf(buf, directBufferClass))) {
3248 return 0;
3249 }
3250
3251 ret = (void*)(intptr_t)env->GetLongField(buf, directBufferAddressField);
3252 return ret;
3253 }
3254
3255 DT_RETURN_MARK_DECL(GetDirectBufferCapacity, jlong
3256 , HOTSPOT_JNI_GETDIRECTBUFFERCAPACITY_RETURN(_ret_ref));
3257
3258 extern "C" jlong JNICALL jni_GetDirectBufferCapacity(JNIEnv *env, jobject buf)
3259 {
3260 // thread_from_jni_environment() will block if VM is gone.
3261 JavaThread* thread = JavaThread::thread_from_jni_environment(env);
3262
3263 JNIWrapper("jni_GetDirectBufferCapacity");
3264 HOTSPOT_JNI_GETDIRECTBUFFERCAPACITY_ENTRY(env, buf);
3265 jlong ret = -1;
3266 DT_RETURN_MARK(GetDirectBufferCapacity, jlong, (const jlong&)ret);
3267
3268 if (!directBufferSupportInitializeEnded) {
3269 if (!initializeDirectBufferSupport(env, thread)) {
3270 ret = 0;
3271 return ret;
3272 }
3273 }
3274
3275 if (buf == NULL) {
3276 return -1;
3277 }
3278
3279 if (!env->IsInstanceOf(buf, directBufferClass)) {
3280 return -1;
3281 }
3282
3283 // NOTE that capacity is currently an int in the implementation
3284 ret = env->GetIntField(buf, bufferCapacityField);
3285 return ret;
3286 }
3287
3288
3289 JNI_LEAF(jint, jni_GetVersion(JNIEnv *env))
3290 JNIWrapper("GetVersion");
3291 HOTSPOT_JNI_GETVERSION_ENTRY(env);
3292 HOTSPOT_JNI_GETVERSION_RETURN(CurrentVersion);
3293 return CurrentVersion;
3294 JNI_END
3295
3296 extern struct JavaVM_ main_vm;
3297
3298 JNI_LEAF(jint, jni_GetJavaVM(JNIEnv *env, JavaVM **vm))
3299 JNIWrapper("jni_GetJavaVM");
3300 HOTSPOT_JNI_GETJAVAVM_ENTRY(env, (void **) vm);
3301 *vm = (JavaVM *)(&main_vm);
3302 HOTSPOT_JNI_GETJAVAVM_RETURN(JNI_OK);
3303 return JNI_OK;
3304 JNI_END
3305
3306
3307 JNI_ENTRY(jobject, jni_GetModule(JNIEnv* env, jclass clazz))
3308 JNIWrapper("GetModule");
3309 return Modules::get_module(clazz, THREAD);
3310 JNI_END
3311
3312
3313 // Structure containing all jni functions
3314 struct JNINativeInterface_ jni_NativeInterface = {
3315 NULL,
3316 NULL,
3317 NULL,
3318
3319 NULL,
3320
3321 jni_GetVersion,
3322
3323 jni_DefineClass,
3324 jni_FindClass,
3325
3326 jni_FromReflectedMethod,
3327 jni_FromReflectedField,
3328
3329 jni_ToReflectedMethod,
3330
3331 jni_GetSuperclass,
3332 jni_IsAssignableFrom,
3333
3334 jni_ToReflectedField,
3335
3336 jni_Throw,
3337 jni_ThrowNew,
3338 jni_ExceptionOccurred,
3339 jni_ExceptionDescribe,
3340 jni_ExceptionClear,
3341 jni_FatalError,
3342
3343 jni_PushLocalFrame,
3344 jni_PopLocalFrame,
3345
3346 jni_NewGlobalRef,
3347 jni_DeleteGlobalRef,
3348 jni_DeleteLocalRef,
3349 jni_IsSameObject,
3350
3351 jni_NewLocalRef,
3352 jni_EnsureLocalCapacity,
3353
3354 jni_AllocObject,
3355 jni_NewObject,
3356 jni_NewObjectV,
3357 jni_NewObjectA,
3358
3359 jni_GetObjectClass,
3360 jni_IsInstanceOf,
3361
3362 jni_GetMethodID,
3363
3364 jni_CallObjectMethod,
3365 jni_CallObjectMethodV,
3366 jni_CallObjectMethodA,
3367 jni_CallBooleanMethod,
3368 jni_CallBooleanMethodV,
3369 jni_CallBooleanMethodA,
3370 jni_CallByteMethod,
3371 jni_CallByteMethodV,
3372 jni_CallByteMethodA,
3373 jni_CallCharMethod,
3374 jni_CallCharMethodV,
3375 jni_CallCharMethodA,
3376 jni_CallShortMethod,
3377 jni_CallShortMethodV,
3378 jni_CallShortMethodA,
3379 jni_CallIntMethod,
3380 jni_CallIntMethodV,
3381 jni_CallIntMethodA,
3382 jni_CallLongMethod,
3383 jni_CallLongMethodV,
3384 jni_CallLongMethodA,
3385 jni_CallFloatMethod,
3386 jni_CallFloatMethodV,
3387 jni_CallFloatMethodA,
3388 jni_CallDoubleMethod,
3389 jni_CallDoubleMethodV,
3390 jni_CallDoubleMethodA,
3391 jni_CallVoidMethod,
3392 jni_CallVoidMethodV,
3393 jni_CallVoidMethodA,
3394
3395 jni_CallNonvirtualObjectMethod,
3396 jni_CallNonvirtualObjectMethodV,
3397 jni_CallNonvirtualObjectMethodA,
3398 jni_CallNonvirtualBooleanMethod,
3399 jni_CallNonvirtualBooleanMethodV,
3400 jni_CallNonvirtualBooleanMethodA,
3401 jni_CallNonvirtualByteMethod,
3402 jni_CallNonvirtualByteMethodV,
3403 jni_CallNonvirtualByteMethodA,
3404 jni_CallNonvirtualCharMethod,
3405 jni_CallNonvirtualCharMethodV,
3406 jni_CallNonvirtualCharMethodA,
3407 jni_CallNonvirtualShortMethod,
3408 jni_CallNonvirtualShortMethodV,
3409 jni_CallNonvirtualShortMethodA,
3410 jni_CallNonvirtualIntMethod,
3411 jni_CallNonvirtualIntMethodV,
3412 jni_CallNonvirtualIntMethodA,
3413 jni_CallNonvirtualLongMethod,
3414 jni_CallNonvirtualLongMethodV,
3415 jni_CallNonvirtualLongMethodA,
3416 jni_CallNonvirtualFloatMethod,
3417 jni_CallNonvirtualFloatMethodV,
3418 jni_CallNonvirtualFloatMethodA,
3419 jni_CallNonvirtualDoubleMethod,
3420 jni_CallNonvirtualDoubleMethodV,
3421 jni_CallNonvirtualDoubleMethodA,
3422 jni_CallNonvirtualVoidMethod,
3423 jni_CallNonvirtualVoidMethodV,
3424 jni_CallNonvirtualVoidMethodA,
3425
3426 jni_GetFieldID,
3427
3428 jni_GetObjectField,
3429 jni_GetBooleanField,
3430 jni_GetByteField,
3431 jni_GetCharField,
3432 jni_GetShortField,
3433 jni_GetIntField,
3434 jni_GetLongField,
3435 jni_GetFloatField,
3436 jni_GetDoubleField,
3437
3438 jni_SetObjectField,
3439 jni_SetBooleanField,
3440 jni_SetByteField,
3441 jni_SetCharField,
3442 jni_SetShortField,
3443 jni_SetIntField,
3444 jni_SetLongField,
3445 jni_SetFloatField,
3446 jni_SetDoubleField,
3447
3448 jni_GetStaticMethodID,
3449
3450 jni_CallStaticObjectMethod,
3451 jni_CallStaticObjectMethodV,
3452 jni_CallStaticObjectMethodA,
3453 jni_CallStaticBooleanMethod,
3454 jni_CallStaticBooleanMethodV,
3455 jni_CallStaticBooleanMethodA,
3456 jni_CallStaticByteMethod,
3457 jni_CallStaticByteMethodV,
3458 jni_CallStaticByteMethodA,
3459 jni_CallStaticCharMethod,
3460 jni_CallStaticCharMethodV,
3461 jni_CallStaticCharMethodA,
3462 jni_CallStaticShortMethod,
3463 jni_CallStaticShortMethodV,
3464 jni_CallStaticShortMethodA,
3465 jni_CallStaticIntMethod,
3466 jni_CallStaticIntMethodV,
3467 jni_CallStaticIntMethodA,
3468 jni_CallStaticLongMethod,
3469 jni_CallStaticLongMethodV,
3470 jni_CallStaticLongMethodA,
3471 jni_CallStaticFloatMethod,
3472 jni_CallStaticFloatMethodV,
3473 jni_CallStaticFloatMethodA,
3474 jni_CallStaticDoubleMethod,
3475 jni_CallStaticDoubleMethodV,
3476 jni_CallStaticDoubleMethodA,
3477 jni_CallStaticVoidMethod,
3478 jni_CallStaticVoidMethodV,
3479 jni_CallStaticVoidMethodA,
3480
3481 jni_GetStaticFieldID,
3482
3483 jni_GetStaticObjectField,
3484 jni_GetStaticBooleanField,
3485 jni_GetStaticByteField,
3486 jni_GetStaticCharField,
3487 jni_GetStaticShortField,
3488 jni_GetStaticIntField,
3489 jni_GetStaticLongField,
3490 jni_GetStaticFloatField,
3491 jni_GetStaticDoubleField,
3492
3493 jni_SetStaticObjectField,
3494 jni_SetStaticBooleanField,
3495 jni_SetStaticByteField,
3496 jni_SetStaticCharField,
3497 jni_SetStaticShortField,
3498 jni_SetStaticIntField,
3499 jni_SetStaticLongField,
3500 jni_SetStaticFloatField,
3501 jni_SetStaticDoubleField,
3502
3503 jni_NewString,
3504 jni_GetStringLength,
3505 jni_GetStringChars,
3506 jni_ReleaseStringChars,
3507
3508 jni_NewStringUTF,
3509 jni_GetStringUTFLength,
3510 jni_GetStringUTFChars,
3511 jni_ReleaseStringUTFChars,
3512
3513 jni_GetArrayLength,
3514
3515 jni_NewObjectArray,
3516 jni_GetObjectArrayElement,
3517 jni_SetObjectArrayElement,
3518
3519 jni_NewBooleanArray,
3520 jni_NewByteArray,
3521 jni_NewCharArray,
3522 jni_NewShortArray,
3523 jni_NewIntArray,
3524 jni_NewLongArray,
3525 jni_NewFloatArray,
3526 jni_NewDoubleArray,
3527
3528 jni_GetBooleanArrayElements,
3529 jni_GetByteArrayElements,
3530 jni_GetCharArrayElements,
3531 jni_GetShortArrayElements,
3532 jni_GetIntArrayElements,
3533 jni_GetLongArrayElements,
3534 jni_GetFloatArrayElements,
3535 jni_GetDoubleArrayElements,
3536
3537 jni_ReleaseBooleanArrayElements,
3538 jni_ReleaseByteArrayElements,
3539 jni_ReleaseCharArrayElements,
3540 jni_ReleaseShortArrayElements,
3541 jni_ReleaseIntArrayElements,
3542 jni_ReleaseLongArrayElements,
3543 jni_ReleaseFloatArrayElements,
3544 jni_ReleaseDoubleArrayElements,
3545
3546 jni_GetBooleanArrayRegion,
3547 jni_GetByteArrayRegion,
3548 jni_GetCharArrayRegion,
3549 jni_GetShortArrayRegion,
3550 jni_GetIntArrayRegion,
3551 jni_GetLongArrayRegion,
3552 jni_GetFloatArrayRegion,
3553 jni_GetDoubleArrayRegion,
3554
3555 jni_SetBooleanArrayRegion,
3556 jni_SetByteArrayRegion,
3557 jni_SetCharArrayRegion,
3558 jni_SetShortArrayRegion,
3559 jni_SetIntArrayRegion,
3560 jni_SetLongArrayRegion,
3561 jni_SetFloatArrayRegion,
3562 jni_SetDoubleArrayRegion,
3563
3564 jni_RegisterNatives,
3565 jni_UnregisterNatives,
3566
3567 jni_MonitorEnter,
3568 jni_MonitorExit,
3569
3570 jni_GetJavaVM,
3571
3572 jni_GetStringRegion,
3573 jni_GetStringUTFRegion,
3574
3575 jni_GetPrimitiveArrayCritical,
3576 jni_ReleasePrimitiveArrayCritical,
3577
3578 jni_GetStringCritical,
3579 jni_ReleaseStringCritical,
3580
3581 jni_NewWeakGlobalRef,
3582 jni_DeleteWeakGlobalRef,
3583
3584 jni_ExceptionCheck,
3585
3586 jni_NewDirectByteBuffer,
3587 jni_GetDirectBufferAddress,
3588 jni_GetDirectBufferCapacity,
3589
3590 // New 1_6 features
3591
3592 jni_GetObjectRefType,
3593
3594 // Module features
3595
3596 jni_GetModule
3597 };
3598
3599
3600 // For jvmti use to modify jni function table.
3601 // Java threads in native contiues to run until it is transitioned
3602 // to VM at safepoint. Before the transition or before it is blocked
3603 // for safepoint it may access jni function table. VM could crash if
3604 // any java thread access the jni function table in the middle of memcpy.
3605 // To avoid this each function pointers are copied automically.
3606 void copy_jni_function_table(const struct JNINativeInterface_ *new_jni_NativeInterface) {
3607 assert(SafepointSynchronize::is_at_safepoint(), "must be at safepoint");
3608 intptr_t *a = (intptr_t *) jni_functions();
3609 intptr_t *b = (intptr_t *) new_jni_NativeInterface;
3610 for (uint i=0; i < sizeof(struct JNINativeInterface_)/sizeof(void *); i++) {
3611 Atomic::store(a++, *b++);
3612 }
3613 }
3614
3615 void quicken_jni_functions() {
3616 // Replace Get<Primitive>Field with fast versions
3617 if (UseFastJNIAccessors && !VerifyJNIFields && !CountJNICalls && !CheckJNICalls) {
3618 address func;
3619 func = JNI_FastGetField::generate_fast_get_boolean_field();
3620 if (func != (address)-1) {
3621 jni_NativeInterface.GetBooleanField = (GetBooleanField_t)func;
3622 }
3623 func = JNI_FastGetField::generate_fast_get_byte_field();
3624 if (func != (address)-1) {
3625 jni_NativeInterface.GetByteField = (GetByteField_t)func;
3626 }
3627 func = JNI_FastGetField::generate_fast_get_char_field();
3628 if (func != (address)-1) {
3629 jni_NativeInterface.GetCharField = (GetCharField_t)func;
3630 }
3631 func = JNI_FastGetField::generate_fast_get_short_field();
3632 if (func != (address)-1) {
3633 jni_NativeInterface.GetShortField = (GetShortField_t)func;
3634 }
3635 func = JNI_FastGetField::generate_fast_get_int_field();
3636 if (func != (address)-1) {
3637 jni_NativeInterface.GetIntField = (GetIntField_t)func;
3638 }
3639 func = JNI_FastGetField::generate_fast_get_long_field();
3640 if (func != (address)-1) {
3641 jni_NativeInterface.GetLongField = (GetLongField_t)func;
3642 }
3643 func = JNI_FastGetField::generate_fast_get_float_field();
3644 if (func != (address)-1) {
3645 jni_NativeInterface.GetFloatField = (GetFloatField_t)func;
3646 }
3647 func = JNI_FastGetField::generate_fast_get_double_field();
3648 if (func != (address)-1) {
3649 jni_NativeInterface.GetDoubleField = (GetDoubleField_t)func;
3650 }
3651 }
3652 }
3653
3654 // Returns the function structure
3655 struct JNINativeInterface_* jni_functions() {
3656 #if INCLUDE_JNI_CHECK
3657 if (CheckJNICalls) return jni_functions_check();
3658 #endif // INCLUDE_JNI_CHECK
3659 return &jni_NativeInterface;
3660 }
3661
3662 // Returns the function structure
3663 struct JNINativeInterface_* jni_functions_nocheck() {
3664 return &jni_NativeInterface;
3665 }
3666
3667 static void post_thread_start_event(const JavaThread* jt) {
3668 assert(jt != NULL, "invariant");
3669 EventThreadStart event;
3670 if (event.should_commit()) {
3671 event.set_thread(JFR_THREAD_ID(jt));
3672 event.set_parentThread((traceid)0);
3673 #if INCLUDE_JFR
3674 if (EventThreadStart::is_stacktrace_enabled()) {
3675 jt->jfr_thread_local()->set_cached_stack_trace_id((traceid)0);
3676 event.commit();
3677 jt->jfr_thread_local()->clear_cached_stack_trace();
3678 } else
3679 #endif
3680 {
3681 event.commit();
3682 }
3683 }
3684 }
3685
3686 // Invocation API
3687
3688
3689 // Forward declaration
3690 extern const struct JNIInvokeInterface_ jni_InvokeInterface;
3691
3692 // Global invocation API vars
3693 volatile int vm_created = 0;
3694 // Indicate whether it is safe to recreate VM. Recreation is only
3695 // possible after a failed initial creation attempt in some cases.
3696 volatile int safe_to_recreate_vm = 1;
3697 struct JavaVM_ main_vm = {&jni_InvokeInterface};
3698
3699
3700 #define JAVASTACKSIZE (400 * 1024) /* Default size of a thread java stack */
3701 enum { VERIFY_NONE, VERIFY_REMOTE, VERIFY_ALL };
3702
3703 DT_RETURN_MARK_DECL(GetDefaultJavaVMInitArgs, jint
3704 , HOTSPOT_JNI_GETDEFAULTJAVAVMINITARGS_RETURN(_ret_ref));
3705
3706 _JNI_IMPORT_OR_EXPORT_ jint JNICALL JNI_GetDefaultJavaVMInitArgs(void *args_) {
3707 HOTSPOT_JNI_GETDEFAULTJAVAVMINITARGS_ENTRY(args_);
3708 JDK1_1InitArgs *args = (JDK1_1InitArgs *)args_;
3709 jint ret = JNI_ERR;
3710 DT_RETURN_MARK(GetDefaultJavaVMInitArgs, jint, (const jint&)ret);
3711
3712 if (Threads::is_supported_jni_version(args->version)) {
3713 ret = JNI_OK;
3714 }
3715 // 1.1 style no longer supported in hotspot.
3716 // According the JNI spec, we should update args->version on return.
3717 // We also use the structure to communicate with launcher about default
3718 // stack size.
3719 if (args->version == JNI_VERSION_1_1) {
3720 args->version = JNI_VERSION_1_2;
3721 // javaStackSize is int in arguments structure
3722 assert(jlong(ThreadStackSize) * K < INT_MAX, "integer overflow");
3723 args->javaStackSize = (jint)(ThreadStackSize * K);
3724 }
3725 return ret;
3726 }
3727
3728 DT_RETURN_MARK_DECL(CreateJavaVM, jint
3729 , HOTSPOT_JNI_CREATEJAVAVM_RETURN(_ret_ref));
3730
3731 static jint JNI_CreateJavaVM_inner(JavaVM **vm, void **penv, void *args) {
3732 HOTSPOT_JNI_CREATEJAVAVM_ENTRY((void **) vm, penv, args);
3733
3734 jint result = JNI_ERR;
3735 DT_RETURN_MARK(CreateJavaVM, jint, (const jint&)result);
3736
3737 // We're about to use Atomic::xchg for synchronization. Some Zero
3738 // platforms use the GCC builtin __sync_lock_test_and_set for this,
3739 // but __sync_lock_test_and_set is not guaranteed to do what we want
3740 // on all architectures. So we check it works before relying on it.
3741 #if defined(ZERO) && defined(ASSERT)
3742 {
3743 jint a = 0xcafebabe;
3744 jint b = Atomic::xchg(&a, (jint) 0xdeadbeef);
3745 void *c = &a;
3746 void *d = Atomic::xchg(&c, &b);
3747 assert(a == (jint) 0xdeadbeef && b == (jint) 0xcafebabe, "Atomic::xchg() works");
3748 assert(c == &b && d == &a, "Atomic::xchg() works");
3749 }
3750 #endif // ZERO && ASSERT
3751
3752 // At the moment it's only possible to have one Java VM,
3753 // since some of the runtime state is in global variables.
3754
3755 // We cannot use our mutex locks here, since they only work on
3756 // Threads. We do an atomic compare and exchange to ensure only
3757 // one thread can call this method at a time
3758
3759 // We use Atomic::xchg rather than Atomic::add/dec since on some platforms
3760 // the add/dec implementations are dependent on whether we are running
3761 // on a multiprocessor Atomic::xchg does not have this problem.
3762 if (Atomic::xchg(&vm_created, 1) == 1) {
3763 return JNI_EEXIST; // already created, or create attempt in progress
3764 }
3765
3766 // If a previous creation attempt failed but can be retried safely,
3767 // then safe_to_recreate_vm will have been reset to 1 after being
3768 // cleared here. If a previous creation attempt succeeded and we then
3769 // destroyed that VM, we will be prevented from trying to recreate
3770 // the VM in the same process, as the value will still be 0.
3771 if (Atomic::xchg(&safe_to_recreate_vm, 0) == 0) {
3772 return JNI_ERR;
3773 }
3774
3775 assert(vm_created == 1, "vm_created is true during the creation");
3776
3777 /**
3778 * Certain errors during initialization are recoverable and do not
3779 * prevent this method from being called again at a later time
3780 * (perhaps with different arguments). However, at a certain
3781 * point during initialization if an error occurs we cannot allow
3782 * this function to be called again (or it will crash). In those
3783 * situations, the 'canTryAgain' flag is set to false, which atomically
3784 * sets safe_to_recreate_vm to 1, such that any new call to
3785 * JNI_CreateJavaVM will immediately fail using the above logic.
3786 */
3787 bool can_try_again = true;
3788
3789 result = Threads::create_vm((JavaVMInitArgs*) args, &can_try_again);
3790 if (result == JNI_OK) {
3791 JavaThread *thread = JavaThread::current();
3792 assert(!thread->has_pending_exception(), "should have returned not OK");
3793 /* thread is thread_in_vm here */
3794 *vm = (JavaVM *)(&main_vm);
3795 *(JNIEnv**)penv = thread->jni_environment();
3796
3797 #if INCLUDE_JVMCI
3798 if (EnableJVMCI) {
3799 if (UseJVMCICompiler) {
3800 // JVMCI is initialized on a CompilerThread
3801 if (BootstrapJVMCI) {
3802 JavaThread* THREAD = thread;
3803 JVMCICompiler* compiler = JVMCICompiler::instance(true, CATCH);
3804 compiler->bootstrap(THREAD);
3805 if (HAS_PENDING_EXCEPTION) {
3806 HandleMark hm;
3807 vm_exit_during_initialization(Handle(THREAD, PENDING_EXCEPTION));
3808 }
3809 }
3810 }
3811 }
3812 #endif
3813
3814 // Notify JVMTI
3815 if (JvmtiExport::should_post_thread_life()) {
3816 JvmtiExport::post_thread_start(thread);
3817 }
3818
3819 post_thread_start_event(thread);
3820
3821 #ifndef PRODUCT
3822 if (ReplayCompiles) ciReplay::replay(thread);
3823
3824 // Some platforms (like Win*) need a wrapper around these test
3825 // functions in order to properly handle error conditions.
3826 VMError::test_error_handler();
3827 #endif
3828
3829 // Since this is not a JVM_ENTRY we have to set the thread state manually before leaving.
3830 ThreadStateTransition::transition(thread, _thread_in_vm, _thread_in_native);
3831 } else {
3832 // If create_vm exits because of a pending exception, exit with that
3833 // exception. In the future when we figure out how to reclaim memory,
3834 // we may be able to exit with JNI_ERR and allow the calling application
3835 // to continue.
3836 if (Universe::is_fully_initialized()) {
3837 // otherwise no pending exception possible - VM will already have aborted
3838 JavaThread* THREAD = JavaThread::current();
3839 if (HAS_PENDING_EXCEPTION) {
3840 HandleMark hm;
3841 vm_exit_during_initialization(Handle(THREAD, PENDING_EXCEPTION));
3842 }
3843 }
3844
3845 if (can_try_again) {
3846 // reset safe_to_recreate_vm to 1 so that retrial would be possible
3847 safe_to_recreate_vm = 1;
3848 }
3849
3850 // Creation failed. We must reset vm_created
3851 *vm = 0;
3852 *(JNIEnv**)penv = 0;
3853 // reset vm_created last to avoid race condition. Use OrderAccess to
3854 // control both compiler and architectural-based reordering.
3855 Atomic::release_store(&vm_created, 0);
3856 }
3857
3858 // Flush stdout and stderr before exit.
3859 fflush(stdout);
3860 fflush(stderr);
3861
3862 return result;
3863
3864 }
3865
3866 _JNI_IMPORT_OR_EXPORT_ jint JNICALL JNI_CreateJavaVM(JavaVM **vm, void **penv, void *args) {
3867 jint result = JNI_ERR;
3868 // On Windows, let CreateJavaVM run with SEH protection
3869 #ifdef _WIN32
3870 __try {
3871 #endif
3872 result = JNI_CreateJavaVM_inner(vm, penv, args);
3873 #ifdef _WIN32
3874 } __except(topLevelExceptionFilter((_EXCEPTION_POINTERS*)_exception_info())) {
3875 // Nothing to do.
3876 }
3877 #endif
3878 return result;
3879 }
3880
3881 _JNI_IMPORT_OR_EXPORT_ jint JNICALL JNI_GetCreatedJavaVMs(JavaVM **vm_buf, jsize bufLen, jsize *numVMs) {
3882 // See bug 4367188, the wrapper can sometimes cause VM crashes
3883 // JNIWrapper("GetCreatedJavaVMs");
3884
3885 HOTSPOT_JNI_GETCREATEDJAVAVMS_ENTRY((void **) vm_buf, bufLen, (uintptr_t *) numVMs);
3886
3887 if (vm_created == 1) {
3888 if (numVMs != NULL) *numVMs = 1;
3889 if (bufLen > 0) *vm_buf = (JavaVM *)(&main_vm);
3890 } else {
3891 if (numVMs != NULL) *numVMs = 0;
3892 }
3893 HOTSPOT_JNI_GETCREATEDJAVAVMS_RETURN(JNI_OK);
3894 return JNI_OK;
3895 }
3896
3897 extern "C" {
3898
3899 DT_RETURN_MARK_DECL(DestroyJavaVM, jint
3900 , HOTSPOT_JNI_DESTROYJAVAVM_RETURN(_ret_ref));
3901
3902 static jint JNICALL jni_DestroyJavaVM_inner(JavaVM *vm) {
3903 HOTSPOT_JNI_DESTROYJAVAVM_ENTRY(vm);
3904 jint res = JNI_ERR;
3905 DT_RETURN_MARK(DestroyJavaVM, jint, (const jint&)res);
3906
3907 if (vm_created == 0) {
3908 res = JNI_ERR;
3909 return res;
3910 }
3911
3912 JNIWrapper("DestroyJavaVM");
3913 JNIEnv *env;
3914 JavaVMAttachArgs destroyargs;
3915 destroyargs.version = CurrentVersion;
3916 destroyargs.name = (char *)"DestroyJavaVM";
3917 destroyargs.group = NULL;
3918 res = vm->AttachCurrentThread((void **)&env, (void *)&destroyargs);
3919 if (res != JNI_OK) {
3920 return res;
3921 }
3922
3923 // Since this is not a JVM_ENTRY we have to set the thread state manually before entering.
3924 JavaThread* thread = JavaThread::current();
3925 ThreadStateTransition::transition_from_native(thread, _thread_in_vm);
3926 if (Threads::destroy_vm()) {
3927 // Should not change thread state, VM is gone
3928 vm_created = 0;
3929 res = JNI_OK;
3930 return res;
3931 } else {
3932 ThreadStateTransition::transition(thread, _thread_in_vm, _thread_in_native);
3933 res = JNI_ERR;
3934 return res;
3935 }
3936 }
3937
3938 jint JNICALL jni_DestroyJavaVM(JavaVM *vm) {
3939 jint result = JNI_ERR;
3940 // On Windows, we need SEH protection
3941 #ifdef _WIN32
3942 __try {
3943 #endif
3944 result = jni_DestroyJavaVM_inner(vm);
3945 #ifdef _WIN32
3946 } __except(topLevelExceptionFilter((_EXCEPTION_POINTERS*)_exception_info())) {
3947 // Nothing to do.
3948 }
3949 #endif
3950 return result;
3951 }
3952
3953 static jint attach_current_thread(JavaVM *vm, void **penv, void *_args, bool daemon) {
3954 JavaVMAttachArgs *args = (JavaVMAttachArgs *) _args;
3955
3956 // Check below commented out from JDK1.2fcs as well
3957 /*
3958 if (args && (args->version != JNI_VERSION_1_1 || args->version != JNI_VERSION_1_2)) {
3959 return JNI_EVERSION;
3960 }
3961 */
3962
3963 Thread* t = Thread::current_or_null();
3964 if (t != NULL) {
3965 // If executing from an atexit hook we may be in the VMThread.
3966 if (t->is_Java_thread()) {
3967 // If the thread has been attached this operation is a no-op
3968 *(JNIEnv**)penv = ((JavaThread*) t)->jni_environment();
3969 return JNI_OK;
3970 } else {
3971 return JNI_ERR;
3972 }
3973 }
3974
3975 // Create a thread and mark it as attaching so it will be skipped by the
3976 // ThreadsListEnumerator - see CR 6404306
3977 JavaThread* thread = new JavaThread(true);
3978
3979 // Set correct safepoint info. The thread is going to call into Java when
3980 // initializing the Java level thread object. Hence, the correct state must
3981 // be set in order for the Safepoint code to deal with it correctly.
3982 thread->set_thread_state(_thread_in_vm);
3983 thread->record_stack_base_and_size();
3984 thread->register_thread_stack_with_NMT();
3985 thread->initialize_thread_current();
3986
3987 if (!os::create_attached_thread(thread)) {
3988 thread->smr_delete();
3989 return JNI_ERR;
3990 }
3991 // Enable stack overflow checks
3992 thread->create_stack_guard_pages();
3993
3994 thread->initialize_tlab();
3995
3996 thread->cache_global_variables();
3997
3998 // This thread will not do a safepoint check, since it has
3999 // not been added to the Thread list yet.
4000 { MutexLocker ml(Threads_lock);
4001 // This must be inside this lock in order to get FullGCALot to work properly, i.e., to
4002 // avoid this thread trying to do a GC before it is added to the thread-list
4003 thread->set_active_handles(JNIHandleBlock::allocate_block());
4004 Threads::add(thread, daemon);
4005 }
4006 // Create thread group and name info from attach arguments
4007 oop group = NULL;
4008 char* thread_name = NULL;
4009 if (args != NULL && Threads::is_supported_jni_version(args->version)) {
4010 group = JNIHandles::resolve(args->group);
4011 thread_name = args->name; // may be NULL
4012 }
4013 if (group == NULL) group = Universe::main_thread_group();
4014
4015 // Create Java level thread object and attach it to this thread
4016 bool attach_failed = false;
4017 {
4018 EXCEPTION_MARK;
4019 HandleMark hm(THREAD);
4020 Handle thread_group(THREAD, group);
4021 thread->allocate_threadObj(thread_group, thread_name, daemon, THREAD);
4022 if (HAS_PENDING_EXCEPTION) {
4023 CLEAR_PENDING_EXCEPTION;
4024 // cleanup outside the handle mark.
4025 attach_failed = true;
4026 }
4027 }
4028
4029 if (attach_failed) {
4030 // Added missing cleanup
4031 thread->cleanup_failed_attach_current_thread(daemon);
4032 return JNI_ERR;
4033 }
4034
4035 // mark the thread as no longer attaching
4036 // this uses a fence to push the change through so we don't have
4037 // to regrab the threads_lock
4038 thread->set_done_attaching_via_jni();
4039
4040 // Set java thread status.
4041 java_lang_Thread::set_thread_status(thread->threadObj(),
4042 java_lang_Thread::RUNNABLE);
4043
4044 // Notify the debugger
4045 if (JvmtiExport::should_post_thread_life()) {
4046 JvmtiExport::post_thread_start(thread);
4047 }
4048
4049 post_thread_start_event(thread);
4050
4051 *(JNIEnv**)penv = thread->jni_environment();
4052
4053 // Now leaving the VM, so change thread_state. This is normally automatically taken care
4054 // of in the JVM_ENTRY. But in this situation we have to do it manually. Notice, that by
4055 // using ThreadStateTransition::transition, we do a callback to the safepoint code if
4056 // needed.
4057
4058 ThreadStateTransition::transition(thread, _thread_in_vm, _thread_in_native);
4059
4060 // Perform any platform dependent FPU setup
4061 os::setup_fpu();
4062
4063 return JNI_OK;
4064 }
4065
4066
4067 jint JNICALL jni_AttachCurrentThread(JavaVM *vm, void **penv, void *_args) {
4068 HOTSPOT_JNI_ATTACHCURRENTTHREAD_ENTRY(vm, penv, _args);
4069 if (vm_created == 0) {
4070 HOTSPOT_JNI_ATTACHCURRENTTHREAD_RETURN((uint32_t) JNI_ERR);
4071 return JNI_ERR;
4072 }
4073
4074 JNIWrapper("AttachCurrentThread");
4075 jint ret = attach_current_thread(vm, penv, _args, false);
4076 HOTSPOT_JNI_ATTACHCURRENTTHREAD_RETURN(ret);
4077 return ret;
4078 }
4079
4080
4081 jint JNICALL jni_DetachCurrentThread(JavaVM *vm) {
4082 HOTSPOT_JNI_DETACHCURRENTTHREAD_ENTRY(vm);
4083 if (vm_created == 0) {
4084 HOTSPOT_JNI_DETACHCURRENTTHREAD_RETURN(JNI_ERR);
4085 return JNI_ERR;
4086 }
4087
4088 JNIWrapper("DetachCurrentThread");
4089
4090 Thread* current = Thread::current_or_null();
4091
4092 // If the thread has already been detached the operation is a no-op
4093 if (current == NULL) {
4094 HOTSPOT_JNI_DETACHCURRENTTHREAD_RETURN(JNI_OK);
4095 return JNI_OK;
4096 }
4097
4098 // If executing from an atexit hook we may be in the VMThread.
4099 if (!current->is_Java_thread()) {
4100 HOTSPOT_JNI_DETACHCURRENTTHREAD_RETURN((uint32_t) JNI_ERR);
4101 return JNI_ERR;
4102 }
4103
4104 VM_Exit::block_if_vm_exited();
4105
4106 JavaThread* thread = (JavaThread*) current;
4107 if (thread->has_last_Java_frame()) {
4108 HOTSPOT_JNI_DETACHCURRENTTHREAD_RETURN((uint32_t) JNI_ERR);
4109 // Can't detach a thread that's running java, that can't work.
4110 return JNI_ERR;
4111 }
4112
4113 // Safepoint support. Have to do call-back to safepoint code, if in the
4114 // middle of a safepoint operation
4115 ThreadStateTransition::transition_from_native(thread, _thread_in_vm);
4116
4117 // XXX: Note that JavaThread::exit() call below removes the guards on the
4118 // stack pages set up via enable_stack_{red,yellow}_zone() calls
4119 // above in jni_AttachCurrentThread. Unfortunately, while the setting
4120 // of the guards is visible in jni_AttachCurrentThread above,
4121 // the removal of the guards is buried below in JavaThread::exit()
4122 // here. The abstraction should be more symmetrically either exposed
4123 // or hidden (e.g. it could probably be hidden in the same
4124 // (platform-dependent) methods where we do alternate stack
4125 // maintenance work?)
4126 thread->exit(false, JavaThread::jni_detach);
4127 thread->smr_delete();
4128
4129 HOTSPOT_JNI_DETACHCURRENTTHREAD_RETURN(JNI_OK);
4130 return JNI_OK;
4131 }
4132
4133 DT_RETURN_MARK_DECL(GetEnv, jint
4134 , HOTSPOT_JNI_GETENV_RETURN(_ret_ref));
4135
4136 jint JNICALL jni_GetEnv(JavaVM *vm, void **penv, jint version) {
4137 HOTSPOT_JNI_GETENV_ENTRY(vm, penv, version);
4138 jint ret = JNI_ERR;
4139 DT_RETURN_MARK(GetEnv, jint, (const jint&)ret);
4140
4141 if (vm_created == 0) {
4142 *penv = NULL;
4143 ret = JNI_EDETACHED;
4144 return ret;
4145 }
4146
4147 if (JniExportedInterface::GetExportedInterface(vm, penv, version, &ret)) {
4148 return ret;
4149 }
4150
4151 #ifndef JVMPI_VERSION_1
4152 // need these in order to be polite about older agents
4153 #define JVMPI_VERSION_1 ((jint)0x10000001)
4154 #define JVMPI_VERSION_1_1 ((jint)0x10000002)
4155 #define JVMPI_VERSION_1_2 ((jint)0x10000003)
4156 #endif // !JVMPI_VERSION_1
4157
4158 Thread* thread = Thread::current_or_null();
4159 if (thread != NULL && thread->is_Java_thread()) {
4160 if (Threads::is_supported_jni_version_including_1_1(version)) {
4161 *(JNIEnv**)penv = ((JavaThread*) thread)->jni_environment();
4162 ret = JNI_OK;
4163 return ret;
4164
4165 } else if (version == JVMPI_VERSION_1 ||
4166 version == JVMPI_VERSION_1_1 ||
4167 version == JVMPI_VERSION_1_2) {
4168 tty->print_cr("ERROR: JVMPI, an experimental interface, is no longer supported.");
4169 tty->print_cr("Please use the supported interface: the JVM Tool Interface (JVM TI).");
4170 ret = JNI_EVERSION;
4171 return ret;
4172 } else if (JvmtiExport::is_jvmdi_version(version)) {
4173 tty->print_cr("FATAL ERROR: JVMDI is no longer supported.");
4174 tty->print_cr("Please use the supported interface: the JVM Tool Interface (JVM TI).");
4175 ret = JNI_EVERSION;
4176 return ret;
4177 } else {
4178 *penv = NULL;
4179 ret = JNI_EVERSION;
4180 return ret;
4181 }
4182 } else {
4183 *penv = NULL;
4184 ret = JNI_EDETACHED;
4185 return ret;
4186 }
4187 }
4188
4189
4190 jint JNICALL jni_AttachCurrentThreadAsDaemon(JavaVM *vm, void **penv, void *_args) {
4191 HOTSPOT_JNI_ATTACHCURRENTTHREADASDAEMON_ENTRY(vm, penv, _args);
4192 if (vm_created == 0) {
4193 HOTSPOT_JNI_ATTACHCURRENTTHREADASDAEMON_RETURN((uint32_t) JNI_ERR);
4194 return JNI_ERR;
4195 }
4196
4197 JNIWrapper("AttachCurrentThreadAsDaemon");
4198 jint ret = attach_current_thread(vm, penv, _args, true);
4199 HOTSPOT_JNI_ATTACHCURRENTTHREADASDAEMON_RETURN(ret);
4200 return ret;
4201 }
4202
4203
4204 } // End extern "C"
4205
4206 const struct JNIInvokeInterface_ jni_InvokeInterface = {
4207 NULL,
4208 NULL,
4209 NULL,
4210
4211 jni_DestroyJavaVM,
4212 jni_AttachCurrentThread,
4213 jni_DetachCurrentThread,
4214 jni_GetEnv,
4215 jni_AttachCurrentThreadAsDaemon
4216 };