1 /*
2 * Copyright (c) 1997, 2019, Oracle and/or its affiliates. All rights reserved.
3 * Copyright (c) 2012 Red Hat, Inc.
4 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
5 *
6 * This code is free software; you can redistribute it and/or modify it
7 * under the terms of the GNU General Public License version 2 only, as
8 * published by the Free Software Foundation.
9 *
10 * This code is distributed in the hope that it will be useful, but WITHOUT
11 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
12 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
13 * version 2 for more details (a copy is included in the LICENSE file that
14 * accompanied this code).
15 *
16 * You should have received a copy of the GNU General Public License version
17 * 2 along with this work; if not, write to the Free Software Foundation,
18 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
19 *
20 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
21 * or visit www.oracle.com if you need additional information or have any
22 * questions.
23 *
24 */
25
26 #include "precompiled.hpp"
27 #include "jni.h"
28 #include "jvm.h"
29 #include "ci/ciReplay.hpp"
30 #include "classfile/altHashing.hpp"
31 #include "classfile/classFileStream.hpp"
32 #include "classfile/classLoader.hpp"
33 #include "classfile/javaClasses.hpp"
34 #include "classfile/javaClasses.inline.hpp"
35 #include "classfile/modules.hpp"
36 #include "classfile/symbolTable.hpp"
37 #include "classfile/systemDictionary.hpp"
38 #include "classfile/vmSymbols.hpp"
39 #include "gc/shared/gcLocker.inline.hpp"
40 #include "interpreter/linkResolver.hpp"
41 #include "jfr/jfrEvents.hpp"
42 #include "jfr/support/jfrThreadId.hpp"
43 #include "logging/log.hpp"
44 #include "memory/allocation.hpp"
45 #include "memory/allocation.inline.hpp"
46 #include "memory/oopFactory.hpp"
47 #include "memory/resourceArea.hpp"
48 #include "memory/universe.hpp"
49 #include "oops/access.inline.hpp"
50 #include "oops/arrayOop.inline.hpp"
51 #include "oops/instanceKlass.hpp"
52 #include "oops/instanceOop.hpp"
53 #include "oops/markWord.hpp"
54 #include "oops/method.hpp"
55 #include "oops/objArrayKlass.hpp"
56 #include "oops/objArrayOop.inline.hpp"
57 #include "oops/oop.inline.hpp"
58 #include "oops/symbol.hpp"
59 #include "oops/typeArrayKlass.hpp"
60 #include "oops/typeArrayOop.inline.hpp"
61 #include "prims/jniCheck.hpp"
62 #include "prims/jniExport.hpp"
63 #include "prims/jniFastGetField.hpp"
64 #include "prims/jvm_misc.hpp"
65 #include "prims/jvmtiExport.hpp"
66 #include "prims/jvmtiThreadState.hpp"
67 #include "runtime/atomic.hpp"
68 #include "runtime/fieldDescriptor.inline.hpp"
69 #include "runtime/handles.inline.hpp"
70 #include "runtime/interfaceSupport.inline.hpp"
71 #include "runtime/java.hpp"
72 #include "runtime/javaCalls.hpp"
73 #include "runtime/jfieldIDWorkaround.hpp"
74 #include "runtime/jniHandles.inline.hpp"
75 #include "runtime/orderAccess.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(1, &JNIHistogram_lock, 0) != 0) {
277 while (OrderAccess::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::java_lang_ClassLoader_NativeLibrary()) {
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, NativeLibrary::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, 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 virtual void get_bool () = 0;
867 virtual void get_char () = 0;
868 virtual void get_short () = 0;
869 virtual void get_byte () = 0;
870 virtual void get_int () = 0;
871 virtual void get_long () = 0;
872 virtual void get_float () = 0;
873 virtual void get_double () = 0;
874 virtual void get_object () = 0;
875
876 JNI_ArgumentPusher(Symbol* signature) : SignatureIterator(signature) {
877 this->_return_type = T_ILLEGAL;
878 _arguments = NULL;
879 }
880
881 public:
882 virtual void iterate( uint64_t fingerprint ) = 0;
883
884 void set_java_argument_object(JavaCallArguments *arguments) { _arguments = arguments; }
885
886 inline void do_bool() { if (!is_return_type()) get_bool(); }
887 inline void do_char() { if (!is_return_type()) get_char(); }
888 inline void do_short() { if (!is_return_type()) get_short(); }
889 inline void do_byte() { if (!is_return_type()) get_byte(); }
890 inline void do_int() { if (!is_return_type()) get_int(); }
891 inline void do_long() { if (!is_return_type()) get_long(); }
892 inline void do_float() { if (!is_return_type()) get_float(); }
893 inline void do_double() { if (!is_return_type()) get_double(); }
894 inline void do_object(int begin, int end) { if (!is_return_type()) get_object(); }
895 inline void do_array(int begin, int end) { if (!is_return_type()) get_object(); } // do_array uses get_object -- there is no get_array
896 inline void do_void() { }
897
898 JavaCallArguments* arguments() { return _arguments; }
899 void push_receiver(Handle h) { _arguments->push_oop(h); }
900 };
901
902
903 class JNI_ArgumentPusherVaArg : public JNI_ArgumentPusher {
904 protected:
905 va_list _ap;
906
907 inline void get_bool() {
908 // Normalize boolean arguments from native code by converting 1-255 to JNI_TRUE and
909 // 0 to JNI_FALSE. Boolean return values from native are normalized the same in
910 // TemplateInterpreterGenerator::generate_result_handler_for and
911 // SharedRuntime::generate_native_wrapper.
912 jboolean b = va_arg(_ap, jint);
913 _arguments->push_int((jint)(b == 0 ? JNI_FALSE : JNI_TRUE));
914 }
915 inline void get_char() { _arguments->push_int(va_arg(_ap, jint)); } // char is coerced to int when using va_arg
916 inline void get_short() { _arguments->push_int(va_arg(_ap, jint)); } // short is coerced to int when using va_arg
917 inline void get_byte() { _arguments->push_int(va_arg(_ap, jint)); } // byte is coerced to int when using va_arg
918 inline void get_int() { _arguments->push_int(va_arg(_ap, jint)); }
919
920 // each of these paths is exercized by the various jck Call[Static,Nonvirtual,][Void,Int,..]Method[A,V,] tests
921
922 inline void get_long() { _arguments->push_long(va_arg(_ap, jlong)); }
923 inline void get_float() { _arguments->push_float((jfloat)va_arg(_ap, jdouble)); } // float is coerced to double w/ va_arg
924 inline void get_double() { _arguments->push_double(va_arg(_ap, jdouble)); }
925 inline void get_object() { _arguments->push_jobject(va_arg(_ap, jobject)); }
926
927 inline void set_ap(va_list rap) {
928 va_copy(_ap, rap);
929 }
930
931 public:
932 JNI_ArgumentPusherVaArg(Symbol* signature, va_list rap)
933 : JNI_ArgumentPusher(signature) {
934 set_ap(rap);
935 }
936 JNI_ArgumentPusherVaArg(jmethodID method_id, va_list rap)
937 : JNI_ArgumentPusher(Method::resolve_jmethod_id(method_id)->signature()) {
938 set_ap(rap);
939 }
940
941 // Optimized path if we have the bitvector form of signature
942 void iterate( uint64_t fingerprint ) {
943 if (fingerprint == (uint64_t)CONST64(-1)) {
944 SignatureIterator::iterate(); // Must be too many arguments
945 } else {
946 _return_type = (BasicType)((fingerprint >> static_feature_size) &
947 result_feature_mask);
948
949 assert(fingerprint, "Fingerprint should not be 0");
950 fingerprint = fingerprint >> (static_feature_size + result_feature_size);
951 while ( 1 ) {
952 switch ( fingerprint & parameter_feature_mask ) {
953 case bool_parm:
954 get_bool();
955 break;
956 case char_parm:
957 get_char();
958 break;
959 case short_parm:
960 get_short();
961 break;
962 case byte_parm:
963 get_byte();
964 break;
965 case int_parm:
966 get_int();
967 break;
968 case obj_parm:
969 get_object();
970 break;
971 case long_parm:
972 get_long();
973 break;
974 case float_parm:
975 get_float();
976 break;
977 case double_parm:
978 get_double();
979 break;
980 case done_parm:
981 return;
982 break;
983 default:
984 ShouldNotReachHere();
985 break;
986 }
987 fingerprint >>= parameter_feature_size;
988 }
989 }
990 }
991 };
992
993
994 class JNI_ArgumentPusherArray : public JNI_ArgumentPusher {
995 protected:
996 const jvalue *_ap;
997
998 inline void get_bool() {
999 // Normalize boolean arguments from native code by converting 1-255 to JNI_TRUE and
1000 // 0 to JNI_FALSE. Boolean return values from native are normalized the same in
1001 // TemplateInterpreterGenerator::generate_result_handler_for and
1002 // SharedRuntime::generate_native_wrapper.
1003 jboolean b = (_ap++)->z;
1004 _arguments->push_int((jint)(b == 0 ? JNI_FALSE : JNI_TRUE));
1005 }
1006 inline void get_char() { _arguments->push_int((jint)(_ap++)->c); }
1007 inline void get_short() { _arguments->push_int((jint)(_ap++)->s); }
1008 inline void get_byte() { _arguments->push_int((jint)(_ap++)->b); }
1009 inline void get_int() { _arguments->push_int((jint)(_ap++)->i); }
1010
1011 inline void get_long() { _arguments->push_long((_ap++)->j); }
1012 inline void get_float() { _arguments->push_float((_ap++)->f); }
1013 inline void get_double() { _arguments->push_double((_ap++)->d);}
1014 inline void get_object() { _arguments->push_jobject((_ap++)->l); }
1015
1016 inline void set_ap(const jvalue *rap) { _ap = rap; }
1017
1018 public:
1019 JNI_ArgumentPusherArray(Symbol* signature, const jvalue *rap)
1020 : JNI_ArgumentPusher(signature) {
1021 set_ap(rap);
1022 }
1023 JNI_ArgumentPusherArray(jmethodID method_id, const jvalue *rap)
1024 : JNI_ArgumentPusher(Method::resolve_jmethod_id(method_id)->signature()) {
1025 set_ap(rap);
1026 }
1027
1028 // Optimized path if we have the bitvector form of signature
1029 void iterate( uint64_t fingerprint ) {
1030 if (fingerprint == (uint64_t)CONST64(-1)) {
1031 SignatureIterator::iterate(); // Must be too many arguments
1032 } else {
1033 _return_type = (BasicType)((fingerprint >> static_feature_size) &
1034 result_feature_mask);
1035 assert(fingerprint, "Fingerprint should not be 0");
1036 fingerprint = fingerprint >> (static_feature_size + result_feature_size);
1037 while ( 1 ) {
1038 switch ( fingerprint & parameter_feature_mask ) {
1039 case bool_parm:
1040 get_bool();
1041 break;
1042 case char_parm:
1043 get_char();
1044 break;
1045 case short_parm:
1046 get_short();
1047 break;
1048 case byte_parm:
1049 get_byte();
1050 break;
1051 case int_parm:
1052 get_int();
1053 break;
1054 case obj_parm:
1055 get_object();
1056 break;
1057 case long_parm:
1058 get_long();
1059 break;
1060 case float_parm:
1061 get_float();
1062 break;
1063 case double_parm:
1064 get_double();
1065 break;
1066 case done_parm:
1067 return;
1068 break;
1069 default:
1070 ShouldNotReachHere();
1071 break;
1072 }
1073 fingerprint >>= parameter_feature_size;
1074 }
1075 }
1076 }
1077 };
1078
1079
1080 enum JNICallType {
1081 JNI_STATIC,
1082 JNI_VIRTUAL,
1083 JNI_NONVIRTUAL
1084 };
1085
1086
1087
1088 static void jni_invoke_static(JNIEnv *env, JavaValue* result, jobject receiver, JNICallType call_type, jmethodID method_id, JNI_ArgumentPusher *args, TRAPS) {
1089 methodHandle method(THREAD, Method::resolve_jmethod_id(method_id));
1090
1091 // Create object to hold arguments for the JavaCall, and associate it with
1092 // the jni parser
1093 ResourceMark rm(THREAD);
1094 int number_of_parameters = method->size_of_parameters();
1095 JavaCallArguments java_args(number_of_parameters);
1096 args->set_java_argument_object(&java_args);
1097
1098 assert(method->is_static(), "method should be static");
1099
1100 // Fill out JavaCallArguments object
1101 args->iterate( Fingerprinter(method).fingerprint() );
1102 // Initialize result type
1103 result->set_type(args->get_ret_type());
1104
1105 // Invoke the method. Result is returned as oop.
1106 JavaCalls::call(result, method, &java_args, CHECK);
1107
1108 // Convert result
1109 if (is_reference_type(result->get_type())) {
1110 result->set_jobject(JNIHandles::make_local(env, (oop) result->get_jobject()));
1111 }
1112 }
1113
1114
1115 static void jni_invoke_nonstatic(JNIEnv *env, JavaValue* result, jobject receiver, JNICallType call_type, jmethodID method_id, JNI_ArgumentPusher *args, TRAPS) {
1116 oop recv = JNIHandles::resolve(receiver);
1117 if (recv == NULL) {
1118 THROW(vmSymbols::java_lang_NullPointerException());
1119 }
1120 Handle h_recv(THREAD, recv);
1121
1122 int number_of_parameters;
1123 Method* selected_method;
1124 {
1125 Method* m = Method::resolve_jmethod_id(method_id);
1126 number_of_parameters = m->size_of_parameters();
1127 Klass* holder = m->method_holder();
1128 if (call_type != JNI_VIRTUAL) {
1129 selected_method = m;
1130 } else if (!m->has_itable_index()) {
1131 // non-interface call -- for that little speed boost, don't handlize
1132 debug_only(NoSafepointVerifier nosafepoint;)
1133 // jni_GetMethodID makes sure class is linked and initialized
1134 // so m should have a valid vtable index.
1135 assert(m->valid_vtable_index(), "no valid vtable index");
1136 int vtbl_index = m->vtable_index();
1137 if (vtbl_index != Method::nonvirtual_vtable_index) {
1138 selected_method = h_recv->klass()->method_at_vtable(vtbl_index);
1139 } else {
1140 // final method
1141 selected_method = m;
1142 }
1143 } else {
1144 // interface call
1145 int itbl_index = m->itable_index();
1146 Klass* k = h_recv->klass();
1147 selected_method = InstanceKlass::cast(k)->method_at_itable(holder, itbl_index, CHECK);
1148 }
1149 }
1150
1151 methodHandle method(THREAD, selected_method);
1152
1153 // Create object to hold arguments for the JavaCall, and associate it with
1154 // the jni parser
1155 ResourceMark rm(THREAD);
1156 JavaCallArguments java_args(number_of_parameters);
1157 args->set_java_argument_object(&java_args);
1158
1159 // handle arguments
1160 assert(!method->is_static(), "method %s should not be static", method->name_and_sig_as_C_string());
1161 args->push_receiver(h_recv); // Push jobject handle
1162
1163 // Fill out JavaCallArguments object
1164 args->iterate( Fingerprinter(method).fingerprint() );
1165 // Initialize result type
1166 result->set_type(args->get_ret_type());
1167
1168 // Invoke the method. Result is returned as oop.
1169 JavaCalls::call(result, method, &java_args, CHECK);
1170
1171 // Convert result
1172 if (is_reference_type(result->get_type())) {
1173 result->set_jobject(JNIHandles::make_local(env, (oop) result->get_jobject()));
1174 }
1175 }
1176
1177
1178 static instanceOop alloc_object(jclass clazz, TRAPS) {
1179 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz));
1180 if (k == NULL) {
1181 ResourceMark rm(THREAD);
1182 THROW_(vmSymbols::java_lang_InstantiationException(), NULL);
1183 }
1184 k->check_valid_for_instantiation(false, CHECK_NULL);
1185 k->initialize(CHECK_NULL);
1186 instanceOop ih = InstanceKlass::cast(k)->allocate_instance(THREAD);
1187 return ih;
1188 }
1189
1190 DT_RETURN_MARK_DECL(AllocObject, jobject
1191 , HOTSPOT_JNI_ALLOCOBJECT_RETURN(_ret_ref));
1192
1193 JNI_ENTRY(jobject, jni_AllocObject(JNIEnv *env, jclass clazz))
1194 JNIWrapper("AllocObject");
1195
1196 HOTSPOT_JNI_ALLOCOBJECT_ENTRY(env, clazz);
1197
1198 jobject ret = NULL;
1199 DT_RETURN_MARK(AllocObject, jobject, (const jobject&)ret);
1200
1201 instanceOop i = alloc_object(clazz, CHECK_NULL);
1202 ret = JNIHandles::make_local(env, i);
1203 return ret;
1204 JNI_END
1205
1206 DT_RETURN_MARK_DECL(NewObjectA, jobject
1207 , HOTSPOT_JNI_NEWOBJECTA_RETURN(_ret_ref));
1208
1209 JNI_ENTRY(jobject, jni_NewObjectA(JNIEnv *env, jclass clazz, jmethodID methodID, const jvalue *args))
1210 JNIWrapper("NewObjectA");
1211
1212 HOTSPOT_JNI_NEWOBJECTA_ENTRY(env, clazz, (uintptr_t) methodID);
1213
1214 jobject obj = NULL;
1215 DT_RETURN_MARK(NewObjectA, jobject, (const jobject)obj);
1216
1217 instanceOop i = alloc_object(clazz, CHECK_NULL);
1218 obj = JNIHandles::make_local(env, i);
1219 JavaValue jvalue(T_VOID);
1220 JNI_ArgumentPusherArray ap(methodID, args);
1221 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_NULL);
1222 return obj;
1223 JNI_END
1224
1225
1226 DT_RETURN_MARK_DECL(NewObjectV, jobject
1227 , HOTSPOT_JNI_NEWOBJECTV_RETURN(_ret_ref));
1228
1229 JNI_ENTRY(jobject, jni_NewObjectV(JNIEnv *env, jclass clazz, jmethodID methodID, va_list args))
1230 JNIWrapper("NewObjectV");
1231
1232 HOTSPOT_JNI_NEWOBJECTV_ENTRY(env, clazz, (uintptr_t) methodID);
1233
1234 jobject obj = NULL;
1235 DT_RETURN_MARK(NewObjectV, jobject, (const jobject&)obj);
1236
1237 instanceOop i = alloc_object(clazz, CHECK_NULL);
1238 obj = JNIHandles::make_local(env, i);
1239 JavaValue jvalue(T_VOID);
1240 JNI_ArgumentPusherVaArg ap(methodID, args);
1241 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_NULL);
1242 return obj;
1243 JNI_END
1244
1245
1246 DT_RETURN_MARK_DECL(NewObject, jobject
1247 , HOTSPOT_JNI_NEWOBJECT_RETURN(_ret_ref));
1248
1249 JNI_ENTRY(jobject, jni_NewObject(JNIEnv *env, jclass clazz, jmethodID methodID, ...))
1250 JNIWrapper("NewObject");
1251
1252 HOTSPOT_JNI_NEWOBJECT_ENTRY(env, clazz, (uintptr_t) methodID);
1253
1254 jobject obj = NULL;
1255 DT_RETURN_MARK(NewObject, jobject, (const jobject&)obj);
1256
1257 instanceOop i = alloc_object(clazz, CHECK_NULL);
1258 obj = JNIHandles::make_local(env, i);
1259 va_list args;
1260 va_start(args, methodID);
1261 JavaValue jvalue(T_VOID);
1262 JNI_ArgumentPusherVaArg ap(methodID, args);
1263 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_NULL);
1264 va_end(args);
1265 return obj;
1266 JNI_END
1267
1268
1269 JNI_ENTRY(jclass, jni_GetObjectClass(JNIEnv *env, jobject obj))
1270 JNIWrapper("GetObjectClass");
1271
1272 HOTSPOT_JNI_GETOBJECTCLASS_ENTRY(env, obj);
1273
1274 Klass* k = JNIHandles::resolve_non_null(obj)->klass();
1275 jclass ret =
1276 (jclass) JNIHandles::make_local(env, k->java_mirror());
1277
1278 HOTSPOT_JNI_GETOBJECTCLASS_RETURN(ret);
1279 return ret;
1280 JNI_END
1281
1282 JNI_ENTRY_NO_PRESERVE(jboolean, jni_IsInstanceOf(JNIEnv *env, jobject obj, jclass clazz))
1283 JNIWrapper("IsInstanceOf");
1284
1285 HOTSPOT_JNI_ISINSTANCEOF_ENTRY(env, obj, clazz);
1286
1287 jboolean ret = JNI_TRUE;
1288 if (obj != NULL) {
1289 ret = JNI_FALSE;
1290 Klass* k = java_lang_Class::as_Klass(
1291 JNIHandles::resolve_non_null(clazz));
1292 if (k != NULL) {
1293 ret = JNIHandles::resolve_non_null(obj)->is_a(k) ? JNI_TRUE : JNI_FALSE;
1294 }
1295 }
1296
1297 HOTSPOT_JNI_ISINSTANCEOF_RETURN(ret);
1298 return ret;
1299 JNI_END
1300
1301
1302 static jmethodID get_method_id(JNIEnv *env, jclass clazz, const char *name_str,
1303 const char *sig, bool is_static, TRAPS) {
1304 // %%%% This code should probably just call into a method in the LinkResolver
1305 //
1306 // The class should have been loaded (we have an instance of the class
1307 // passed in) so the method and signature should already be in the symbol
1308 // table. If they're not there, the method doesn't exist.
1309 const char *name_to_probe = (name_str == NULL)
1310 ? vmSymbols::object_initializer_name()->as_C_string()
1311 : name_str;
1312 TempNewSymbol name = SymbolTable::probe(name_to_probe, (int)strlen(name_to_probe));
1313 TempNewSymbol signature = SymbolTable::probe(sig, (int)strlen(sig));
1314
1315 if (name == NULL || signature == NULL) {
1316 THROW_MSG_0(vmSymbols::java_lang_NoSuchMethodError(), name_str);
1317 }
1318
1319 Klass* klass = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz));
1320
1321 // Throw a NoSuchMethodError exception if we have an instance of a
1322 // primitive java.lang.Class
1323 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(clazz))) {
1324 ResourceMark rm;
1325 THROW_MSG_0(vmSymbols::java_lang_NoSuchMethodError(), err_msg("%s%s.%s%s", is_static ? "static " : "", klass->signature_name(), name_str, sig));
1326 }
1327
1328 // Make sure class is linked and initialized before handing id's out to
1329 // Method*s.
1330 klass->initialize(CHECK_NULL);
1331
1332 Method* m;
1333 if (name == vmSymbols::object_initializer_name() ||
1334 name == vmSymbols::class_initializer_name()) {
1335 // Never search superclasses for constructors
1336 if (klass->is_instance_klass()) {
1337 m = InstanceKlass::cast(klass)->find_method(name, signature);
1338 } else {
1339 m = NULL;
1340 }
1341 } else {
1342 m = klass->lookup_method(name, signature);
1343 if (m == NULL && klass->is_instance_klass()) {
1344 m = InstanceKlass::cast(klass)->lookup_method_in_ordered_interfaces(name, signature);
1345 }
1346 }
1347 if (m == NULL || (m->is_static() != is_static)) {
1348 ResourceMark rm;
1349 THROW_MSG_0(vmSymbols::java_lang_NoSuchMethodError(), err_msg("%s%s.%s%s", is_static ? "static " : "", klass->signature_name(), name_str, sig));
1350 }
1351 return m->jmethod_id();
1352 }
1353
1354
1355 JNI_ENTRY(jmethodID, jni_GetMethodID(JNIEnv *env, jclass clazz,
1356 const char *name, const char *sig))
1357 JNIWrapper("GetMethodID");
1358 HOTSPOT_JNI_GETMETHODID_ENTRY(env, clazz, (char *) name, (char *) sig);
1359 jmethodID ret = get_method_id(env, clazz, name, sig, false, thread);
1360 HOTSPOT_JNI_GETMETHODID_RETURN((uintptr_t) ret);
1361 return ret;
1362 JNI_END
1363
1364
1365 JNI_ENTRY(jmethodID, jni_GetStaticMethodID(JNIEnv *env, jclass clazz,
1366 const char *name, const char *sig))
1367 JNIWrapper("GetStaticMethodID");
1368 HOTSPOT_JNI_GETSTATICMETHODID_ENTRY(env, (char *) clazz, (char *) name, (char *)sig);
1369 jmethodID ret = get_method_id(env, clazz, name, sig, true, thread);
1370 HOTSPOT_JNI_GETSTATICMETHODID_RETURN((uintptr_t) ret);
1371 return ret;
1372 JNI_END
1373
1374
1375
1376 //
1377 // Calling Methods
1378 //
1379
1380
1381 #define DEFINE_CALLMETHOD(ResultType, Result, Tag \
1382 , EntryProbe, ReturnProbe) \
1383 \
1384 DT_RETURN_MARK_DECL_FOR(Result, Call##Result##Method, ResultType \
1385 , ReturnProbe); \
1386 \
1387 JNI_ENTRY(ResultType, \
1388 jni_Call##Result##Method(JNIEnv *env, jobject obj, jmethodID methodID, ...)) \
1389 JNIWrapper("Call" XSTR(Result) "Method"); \
1390 \
1391 EntryProbe; \
1392 ResultType ret = 0;\
1393 DT_RETURN_MARK_FOR(Result, Call##Result##Method, ResultType, \
1394 (const ResultType&)ret);\
1395 \
1396 va_list args; \
1397 va_start(args, methodID); \
1398 JavaValue jvalue(Tag); \
1399 JNI_ArgumentPusherVaArg ap(methodID, args); \
1400 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK_0); \
1401 va_end(args); \
1402 ret = jvalue.get_##ResultType(); \
1403 return ret;\
1404 JNI_END
1405
1406 // the runtime type of subword integral basic types is integer
1407 DEFINE_CALLMETHOD(jboolean, Boolean, T_BOOLEAN
1408 , HOTSPOT_JNI_CALLBOOLEANMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1409 HOTSPOT_JNI_CALLBOOLEANMETHOD_RETURN(_ret_ref))
1410 DEFINE_CALLMETHOD(jbyte, Byte, T_BYTE
1411 , HOTSPOT_JNI_CALLBYTEMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1412 HOTSPOT_JNI_CALLBYTEMETHOD_RETURN(_ret_ref))
1413 DEFINE_CALLMETHOD(jchar, Char, T_CHAR
1414 , HOTSPOT_JNI_CALLCHARMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1415 HOTSPOT_JNI_CALLCHARMETHOD_RETURN(_ret_ref))
1416 DEFINE_CALLMETHOD(jshort, Short, T_SHORT
1417 , HOTSPOT_JNI_CALLSHORTMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1418 HOTSPOT_JNI_CALLSHORTMETHOD_RETURN(_ret_ref))
1419
1420 DEFINE_CALLMETHOD(jobject, Object, T_OBJECT
1421 , HOTSPOT_JNI_CALLOBJECTMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1422 HOTSPOT_JNI_CALLOBJECTMETHOD_RETURN(_ret_ref))
1423 DEFINE_CALLMETHOD(jint, Int, T_INT,
1424 HOTSPOT_JNI_CALLINTMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1425 HOTSPOT_JNI_CALLINTMETHOD_RETURN(_ret_ref))
1426 DEFINE_CALLMETHOD(jlong, Long, T_LONG
1427 , HOTSPOT_JNI_CALLLONGMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1428 HOTSPOT_JNI_CALLLONGMETHOD_RETURN(_ret_ref))
1429 // Float and double probes don't return value because dtrace doesn't currently support it
1430 DEFINE_CALLMETHOD(jfloat, Float, T_FLOAT
1431 , HOTSPOT_JNI_CALLFLOATMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1432 HOTSPOT_JNI_CALLFLOATMETHOD_RETURN())
1433 DEFINE_CALLMETHOD(jdouble, Double, T_DOUBLE
1434 , HOTSPOT_JNI_CALLDOUBLEMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1435 HOTSPOT_JNI_CALLDOUBLEMETHOD_RETURN())
1436
1437 #define DEFINE_CALLMETHODV(ResultType, Result, Tag \
1438 , EntryProbe, ReturnProbe) \
1439 \
1440 DT_RETURN_MARK_DECL_FOR(Result, Call##Result##MethodV, ResultType \
1441 , ReturnProbe); \
1442 \
1443 JNI_ENTRY(ResultType, \
1444 jni_Call##Result##MethodV(JNIEnv *env, jobject obj, jmethodID methodID, va_list args)) \
1445 JNIWrapper("Call" XSTR(Result) "MethodV"); \
1446 \
1447 EntryProbe;\
1448 ResultType ret = 0;\
1449 DT_RETURN_MARK_FOR(Result, Call##Result##MethodV, ResultType, \
1450 (const ResultType&)ret);\
1451 \
1452 JavaValue jvalue(Tag); \
1453 JNI_ArgumentPusherVaArg ap(methodID, args); \
1454 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK_0); \
1455 ret = jvalue.get_##ResultType(); \
1456 return ret;\
1457 JNI_END
1458
1459 // the runtime type of subword integral basic types is integer
1460 DEFINE_CALLMETHODV(jboolean, Boolean, T_BOOLEAN
1461 , HOTSPOT_JNI_CALLBOOLEANMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1462 HOTSPOT_JNI_CALLBOOLEANMETHODV_RETURN(_ret_ref))
1463 DEFINE_CALLMETHODV(jbyte, Byte, T_BYTE
1464 , HOTSPOT_JNI_CALLBYTEMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1465 HOTSPOT_JNI_CALLBYTEMETHODV_RETURN(_ret_ref))
1466 DEFINE_CALLMETHODV(jchar, Char, T_CHAR
1467 , HOTSPOT_JNI_CALLCHARMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1468 HOTSPOT_JNI_CALLCHARMETHODV_RETURN(_ret_ref))
1469 DEFINE_CALLMETHODV(jshort, Short, T_SHORT
1470 , HOTSPOT_JNI_CALLSHORTMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1471 HOTSPOT_JNI_CALLSHORTMETHODV_RETURN(_ret_ref))
1472
1473 DEFINE_CALLMETHODV(jobject, Object, T_OBJECT
1474 , HOTSPOT_JNI_CALLOBJECTMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1475 HOTSPOT_JNI_CALLOBJECTMETHODV_RETURN(_ret_ref))
1476 DEFINE_CALLMETHODV(jint, Int, T_INT,
1477 HOTSPOT_JNI_CALLINTMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1478 HOTSPOT_JNI_CALLINTMETHODV_RETURN(_ret_ref))
1479 DEFINE_CALLMETHODV(jlong, Long, T_LONG
1480 , HOTSPOT_JNI_CALLLONGMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1481 HOTSPOT_JNI_CALLLONGMETHODV_RETURN(_ret_ref))
1482 // Float and double probes don't return value because dtrace doesn't currently support it
1483 DEFINE_CALLMETHODV(jfloat, Float, T_FLOAT
1484 , HOTSPOT_JNI_CALLFLOATMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1485 HOTSPOT_JNI_CALLFLOATMETHODV_RETURN())
1486 DEFINE_CALLMETHODV(jdouble, Double, T_DOUBLE
1487 , HOTSPOT_JNI_CALLDOUBLEMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1488 HOTSPOT_JNI_CALLDOUBLEMETHODV_RETURN())
1489
1490 #define DEFINE_CALLMETHODA(ResultType, Result, Tag \
1491 , EntryProbe, ReturnProbe) \
1492 \
1493 DT_RETURN_MARK_DECL_FOR(Result, Call##Result##MethodA, ResultType \
1494 , ReturnProbe); \
1495 \
1496 JNI_ENTRY(ResultType, \
1497 jni_Call##Result##MethodA(JNIEnv *env, jobject obj, jmethodID methodID, const jvalue *args)) \
1498 JNIWrapper("Call" XSTR(Result) "MethodA"); \
1499 EntryProbe; \
1500 ResultType ret = 0;\
1501 DT_RETURN_MARK_FOR(Result, Call##Result##MethodA, ResultType, \
1502 (const ResultType&)ret);\
1503 \
1504 JavaValue jvalue(Tag); \
1505 JNI_ArgumentPusherArray ap(methodID, args); \
1506 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK_0); \
1507 ret = jvalue.get_##ResultType(); \
1508 return ret;\
1509 JNI_END
1510
1511 // the runtime type of subword integral basic types is integer
1512 DEFINE_CALLMETHODA(jboolean, Boolean, T_BOOLEAN
1513 , HOTSPOT_JNI_CALLBOOLEANMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1514 HOTSPOT_JNI_CALLBOOLEANMETHODA_RETURN(_ret_ref))
1515 DEFINE_CALLMETHODA(jbyte, Byte, T_BYTE
1516 , HOTSPOT_JNI_CALLBYTEMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1517 HOTSPOT_JNI_CALLBYTEMETHODA_RETURN(_ret_ref))
1518 DEFINE_CALLMETHODA(jchar, Char, T_CHAR
1519 , HOTSPOT_JNI_CALLCHARMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1520 HOTSPOT_JNI_CALLCHARMETHODA_RETURN(_ret_ref))
1521 DEFINE_CALLMETHODA(jshort, Short, T_SHORT
1522 , HOTSPOT_JNI_CALLSHORTMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1523 HOTSPOT_JNI_CALLSHORTMETHODA_RETURN(_ret_ref))
1524
1525 DEFINE_CALLMETHODA(jobject, Object, T_OBJECT
1526 , HOTSPOT_JNI_CALLOBJECTMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1527 HOTSPOT_JNI_CALLOBJECTMETHODA_RETURN(_ret_ref))
1528 DEFINE_CALLMETHODA(jint, Int, T_INT,
1529 HOTSPOT_JNI_CALLINTMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1530 HOTSPOT_JNI_CALLINTMETHODA_RETURN(_ret_ref))
1531 DEFINE_CALLMETHODA(jlong, Long, T_LONG
1532 , HOTSPOT_JNI_CALLLONGMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1533 HOTSPOT_JNI_CALLLONGMETHODA_RETURN(_ret_ref))
1534 // Float and double probes don't return value because dtrace doesn't currently support it
1535 DEFINE_CALLMETHODA(jfloat, Float, T_FLOAT
1536 , HOTSPOT_JNI_CALLFLOATMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1537 HOTSPOT_JNI_CALLFLOATMETHODA_RETURN())
1538 DEFINE_CALLMETHODA(jdouble, Double, T_DOUBLE
1539 , HOTSPOT_JNI_CALLDOUBLEMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1540 HOTSPOT_JNI_CALLDOUBLEMETHODA_RETURN())
1541
1542 DT_VOID_RETURN_MARK_DECL(CallVoidMethod, HOTSPOT_JNI_CALLVOIDMETHOD_RETURN());
1543 DT_VOID_RETURN_MARK_DECL(CallVoidMethodV, HOTSPOT_JNI_CALLVOIDMETHODV_RETURN());
1544 DT_VOID_RETURN_MARK_DECL(CallVoidMethodA, HOTSPOT_JNI_CALLVOIDMETHODA_RETURN());
1545
1546
1547 JNI_ENTRY(void, jni_CallVoidMethod(JNIEnv *env, jobject obj, jmethodID methodID, ...))
1548 JNIWrapper("CallVoidMethod");
1549 HOTSPOT_JNI_CALLVOIDMETHOD_ENTRY(env, obj, (uintptr_t) methodID);
1550 DT_VOID_RETURN_MARK(CallVoidMethod);
1551
1552 va_list args;
1553 va_start(args, methodID);
1554 JavaValue jvalue(T_VOID);
1555 JNI_ArgumentPusherVaArg ap(methodID, args);
1556 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK);
1557 va_end(args);
1558 JNI_END
1559
1560
1561 JNI_ENTRY(void, jni_CallVoidMethodV(JNIEnv *env, jobject obj, jmethodID methodID, va_list args))
1562 JNIWrapper("CallVoidMethodV");
1563 HOTSPOT_JNI_CALLVOIDMETHODV_ENTRY(env, obj, (uintptr_t) methodID);
1564 DT_VOID_RETURN_MARK(CallVoidMethodV);
1565
1566 JavaValue jvalue(T_VOID);
1567 JNI_ArgumentPusherVaArg ap(methodID, args);
1568 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK);
1569 JNI_END
1570
1571
1572 JNI_ENTRY(void, jni_CallVoidMethodA(JNIEnv *env, jobject obj, jmethodID methodID, const jvalue *args))
1573 JNIWrapper("CallVoidMethodA");
1574 HOTSPOT_JNI_CALLVOIDMETHODA_ENTRY(env, obj, (uintptr_t) methodID);
1575 DT_VOID_RETURN_MARK(CallVoidMethodA);
1576
1577 JavaValue jvalue(T_VOID);
1578 JNI_ArgumentPusherArray ap(methodID, args);
1579 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK);
1580 JNI_END
1581
1582
1583
1584 #define DEFINE_CALLNONVIRTUALMETHOD(ResultType, Result, Tag \
1585 , EntryProbe, ReturnProbe) \
1586 \
1587 DT_RETURN_MARK_DECL_FOR(Result, CallNonvirtual##Result##Method, ResultType \
1588 , ReturnProbe);\
1589 \
1590 JNI_ENTRY(ResultType, \
1591 jni_CallNonvirtual##Result##Method(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, ...)) \
1592 JNIWrapper("CallNonvitual" XSTR(Result) "Method"); \
1593 \
1594 EntryProbe;\
1595 ResultType ret;\
1596 DT_RETURN_MARK_FOR(Result, CallNonvirtual##Result##Method, ResultType, \
1597 (const ResultType&)ret);\
1598 \
1599 va_list args; \
1600 va_start(args, methodID); \
1601 JavaValue jvalue(Tag); \
1602 JNI_ArgumentPusherVaArg ap(methodID, args); \
1603 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_0); \
1604 va_end(args); \
1605 ret = jvalue.get_##ResultType(); \
1606 return ret;\
1607 JNI_END
1608
1609 // the runtime type of subword integral basic types is integer
1610 DEFINE_CALLNONVIRTUALMETHOD(jboolean, Boolean, T_BOOLEAN
1611 , HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1612 HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHOD_RETURN(_ret_ref))
1613 DEFINE_CALLNONVIRTUALMETHOD(jbyte, Byte, T_BYTE
1614 , HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1615 HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHOD_RETURN(_ret_ref))
1616 DEFINE_CALLNONVIRTUALMETHOD(jchar, Char, T_CHAR
1617 , HOTSPOT_JNI_CALLNONVIRTUALCHARMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1618 HOTSPOT_JNI_CALLNONVIRTUALCHARMETHOD_RETURN(_ret_ref))
1619 DEFINE_CALLNONVIRTUALMETHOD(jshort, Short, T_SHORT
1620 , HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1621 HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHOD_RETURN(_ret_ref))
1622
1623 DEFINE_CALLNONVIRTUALMETHOD(jobject, Object, T_OBJECT
1624 , HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1625 HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHOD_RETURN(_ret_ref))
1626 DEFINE_CALLNONVIRTUALMETHOD(jint, Int, T_INT
1627 , HOTSPOT_JNI_CALLNONVIRTUALINTMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1628 HOTSPOT_JNI_CALLNONVIRTUALINTMETHOD_RETURN(_ret_ref))
1629 DEFINE_CALLNONVIRTUALMETHOD(jlong, Long, T_LONG
1630 , HOTSPOT_JNI_CALLNONVIRTUALLONGMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1631 // Float and double probes don't return value because dtrace doesn't currently support it
1632 HOTSPOT_JNI_CALLNONVIRTUALLONGMETHOD_RETURN(_ret_ref))
1633 DEFINE_CALLNONVIRTUALMETHOD(jfloat, Float, T_FLOAT
1634 , HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1635 HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHOD_RETURN())
1636 DEFINE_CALLNONVIRTUALMETHOD(jdouble, Double, T_DOUBLE
1637 , HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1638 HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHOD_RETURN())
1639
1640 #define DEFINE_CALLNONVIRTUALMETHODV(ResultType, Result, Tag \
1641 , EntryProbe, ReturnProbe) \
1642 \
1643 DT_RETURN_MARK_DECL_FOR(Result, CallNonvirtual##Result##MethodV, ResultType \
1644 , ReturnProbe);\
1645 \
1646 JNI_ENTRY(ResultType, \
1647 jni_CallNonvirtual##Result##MethodV(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, va_list args)) \
1648 JNIWrapper("CallNonvitual" XSTR(Result) "MethodV"); \
1649 \
1650 EntryProbe;\
1651 ResultType ret;\
1652 DT_RETURN_MARK_FOR(Result, CallNonvirtual##Result##MethodV, ResultType, \
1653 (const ResultType&)ret);\
1654 \
1655 JavaValue jvalue(Tag); \
1656 JNI_ArgumentPusherVaArg ap(methodID, args); \
1657 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_0); \
1658 ret = jvalue.get_##ResultType(); \
1659 return ret;\
1660 JNI_END
1661
1662 // the runtime type of subword integral basic types is integer
1663 DEFINE_CALLNONVIRTUALMETHODV(jboolean, Boolean, T_BOOLEAN
1664 , HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1665 HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHODV_RETURN(_ret_ref))
1666 DEFINE_CALLNONVIRTUALMETHODV(jbyte, Byte, T_BYTE
1667 , HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1668 HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHODV_RETURN(_ret_ref))
1669 DEFINE_CALLNONVIRTUALMETHODV(jchar, Char, T_CHAR
1670 , HOTSPOT_JNI_CALLNONVIRTUALCHARMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1671 HOTSPOT_JNI_CALLNONVIRTUALCHARMETHODV_RETURN(_ret_ref))
1672 DEFINE_CALLNONVIRTUALMETHODV(jshort, Short, T_SHORT
1673 , HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1674 HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHODV_RETURN(_ret_ref))
1675
1676 DEFINE_CALLNONVIRTUALMETHODV(jobject, Object, T_OBJECT
1677 , HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1678 HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHODV_RETURN(_ret_ref))
1679 DEFINE_CALLNONVIRTUALMETHODV(jint, Int, T_INT
1680 , HOTSPOT_JNI_CALLNONVIRTUALINTMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1681 HOTSPOT_JNI_CALLNONVIRTUALINTMETHODV_RETURN(_ret_ref))
1682 DEFINE_CALLNONVIRTUALMETHODV(jlong, Long, T_LONG
1683 , HOTSPOT_JNI_CALLNONVIRTUALLONGMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1684 // Float and double probes don't return value because dtrace doesn't currently support it
1685 HOTSPOT_JNI_CALLNONVIRTUALLONGMETHODV_RETURN(_ret_ref))
1686 DEFINE_CALLNONVIRTUALMETHODV(jfloat, Float, T_FLOAT
1687 , HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1688 HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHODV_RETURN())
1689 DEFINE_CALLNONVIRTUALMETHODV(jdouble, Double, T_DOUBLE
1690 , HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1691 HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHODV_RETURN())
1692
1693 #define DEFINE_CALLNONVIRTUALMETHODA(ResultType, Result, Tag \
1694 , EntryProbe, ReturnProbe) \
1695 \
1696 DT_RETURN_MARK_DECL_FOR(Result, CallNonvirtual##Result##MethodA, ResultType \
1697 , ReturnProbe);\
1698 \
1699 JNI_ENTRY(ResultType, \
1700 jni_CallNonvirtual##Result##MethodA(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, const jvalue *args)) \
1701 JNIWrapper("CallNonvitual" XSTR(Result) "MethodA"); \
1702 \
1703 EntryProbe;\
1704 ResultType ret;\
1705 DT_RETURN_MARK_FOR(Result, CallNonvirtual##Result##MethodA, ResultType, \
1706 (const ResultType&)ret);\
1707 \
1708 JavaValue jvalue(Tag); \
1709 JNI_ArgumentPusherArray ap(methodID, args); \
1710 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_0); \
1711 ret = jvalue.get_##ResultType(); \
1712 return ret;\
1713 JNI_END
1714
1715 // the runtime type of subword integral basic types is integer
1716 DEFINE_CALLNONVIRTUALMETHODA(jboolean, Boolean, T_BOOLEAN
1717 , HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1718 HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHODA_RETURN(_ret_ref))
1719 DEFINE_CALLNONVIRTUALMETHODA(jbyte, Byte, T_BYTE
1720 , HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1721 HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHODA_RETURN(_ret_ref))
1722 DEFINE_CALLNONVIRTUALMETHODA(jchar, Char, T_CHAR
1723 , HOTSPOT_JNI_CALLNONVIRTUALCHARMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1724 HOTSPOT_JNI_CALLNONVIRTUALCHARMETHODA_RETURN(_ret_ref))
1725 DEFINE_CALLNONVIRTUALMETHODA(jshort, Short, T_SHORT
1726 , HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1727 HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHODA_RETURN(_ret_ref))
1728
1729 DEFINE_CALLNONVIRTUALMETHODA(jobject, Object, T_OBJECT
1730 , HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1731 HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHODA_RETURN(_ret_ref))
1732 DEFINE_CALLNONVIRTUALMETHODA(jint, Int, T_INT
1733 , HOTSPOT_JNI_CALLNONVIRTUALINTMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1734 HOTSPOT_JNI_CALLNONVIRTUALINTMETHODA_RETURN(_ret_ref))
1735 DEFINE_CALLNONVIRTUALMETHODA(jlong, Long, T_LONG
1736 , HOTSPOT_JNI_CALLNONVIRTUALLONGMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1737 // Float and double probes don't return value because dtrace doesn't currently support it
1738 HOTSPOT_JNI_CALLNONVIRTUALLONGMETHODA_RETURN(_ret_ref))
1739 DEFINE_CALLNONVIRTUALMETHODA(jfloat, Float, T_FLOAT
1740 , HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1741 HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHODA_RETURN())
1742 DEFINE_CALLNONVIRTUALMETHODA(jdouble, Double, T_DOUBLE
1743 , HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1744 HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHODA_RETURN())
1745
1746 DT_VOID_RETURN_MARK_DECL(CallNonvirtualVoidMethod
1747 , HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHOD_RETURN());
1748 DT_VOID_RETURN_MARK_DECL(CallNonvirtualVoidMethodV
1749 , HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHODV_RETURN());
1750 DT_VOID_RETURN_MARK_DECL(CallNonvirtualVoidMethodA
1751 , HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHODA_RETURN());
1752
1753 JNI_ENTRY(void, jni_CallNonvirtualVoidMethod(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, ...))
1754 JNIWrapper("CallNonvirtualVoidMethod");
1755
1756 HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHOD_ENTRY(env, obj, cls, (uintptr_t) methodID);
1757 DT_VOID_RETURN_MARK(CallNonvirtualVoidMethod);
1758
1759 va_list args;
1760 va_start(args, methodID);
1761 JavaValue jvalue(T_VOID);
1762 JNI_ArgumentPusherVaArg ap(methodID, args);
1763 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK);
1764 va_end(args);
1765 JNI_END
1766
1767
1768 JNI_ENTRY(void, jni_CallNonvirtualVoidMethodV(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, va_list args))
1769 JNIWrapper("CallNonvirtualVoidMethodV");
1770
1771 HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHODV_ENTRY(
1772 env, obj, cls, (uintptr_t) methodID);
1773 DT_VOID_RETURN_MARK(CallNonvirtualVoidMethodV);
1774
1775 JavaValue jvalue(T_VOID);
1776 JNI_ArgumentPusherVaArg ap(methodID, args);
1777 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK);
1778 JNI_END
1779
1780
1781 JNI_ENTRY(void, jni_CallNonvirtualVoidMethodA(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, const jvalue *args))
1782 JNIWrapper("CallNonvirtualVoidMethodA");
1783 HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHODA_ENTRY(
1784 env, obj, cls, (uintptr_t) methodID);
1785 DT_VOID_RETURN_MARK(CallNonvirtualVoidMethodA);
1786 JavaValue jvalue(T_VOID);
1787 JNI_ArgumentPusherArray ap(methodID, args);
1788 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK);
1789 JNI_END
1790
1791
1792
1793 #define DEFINE_CALLSTATICMETHOD(ResultType, Result, Tag \
1794 , EntryProbe, ResultProbe) \
1795 \
1796 DT_RETURN_MARK_DECL_FOR(Result, CallStatic##Result##Method, ResultType \
1797 , ResultProbe); \
1798 \
1799 JNI_ENTRY(ResultType, \
1800 jni_CallStatic##Result##Method(JNIEnv *env, jclass cls, jmethodID methodID, ...)) \
1801 JNIWrapper("CallStatic" XSTR(Result) "Method"); \
1802 \
1803 EntryProbe; \
1804 ResultType ret = 0;\
1805 DT_RETURN_MARK_FOR(Result, CallStatic##Result##Method, ResultType, \
1806 (const ResultType&)ret);\
1807 \
1808 va_list args; \
1809 va_start(args, methodID); \
1810 JavaValue jvalue(Tag); \
1811 JNI_ArgumentPusherVaArg ap(methodID, args); \
1812 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK_0); \
1813 va_end(args); \
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_CALLSTATICMETHOD(jboolean, Boolean, T_BOOLEAN
1820 , HOTSPOT_JNI_CALLSTATICBOOLEANMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1821 HOTSPOT_JNI_CALLSTATICBOOLEANMETHOD_RETURN(_ret_ref));
1822 DEFINE_CALLSTATICMETHOD(jbyte, Byte, T_BYTE
1823 , HOTSPOT_JNI_CALLSTATICBYTEMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1824 HOTSPOT_JNI_CALLSTATICBYTEMETHOD_RETURN(_ret_ref));
1825 DEFINE_CALLSTATICMETHOD(jchar, Char, T_CHAR
1826 , HOTSPOT_JNI_CALLSTATICCHARMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1827 HOTSPOT_JNI_CALLSTATICCHARMETHOD_RETURN(_ret_ref));
1828 DEFINE_CALLSTATICMETHOD(jshort, Short, T_SHORT
1829 , HOTSPOT_JNI_CALLSTATICSHORTMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1830 HOTSPOT_JNI_CALLSTATICSHORTMETHOD_RETURN(_ret_ref));
1831
1832 DEFINE_CALLSTATICMETHOD(jobject, Object, T_OBJECT
1833 , HOTSPOT_JNI_CALLSTATICOBJECTMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1834 HOTSPOT_JNI_CALLSTATICOBJECTMETHOD_RETURN(_ret_ref));
1835 DEFINE_CALLSTATICMETHOD(jint, Int, T_INT
1836 , HOTSPOT_JNI_CALLSTATICINTMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1837 HOTSPOT_JNI_CALLSTATICINTMETHOD_RETURN(_ret_ref));
1838 DEFINE_CALLSTATICMETHOD(jlong, Long, T_LONG
1839 , HOTSPOT_JNI_CALLSTATICLONGMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1840 HOTSPOT_JNI_CALLSTATICLONGMETHOD_RETURN(_ret_ref));
1841 // Float and double probes don't return value because dtrace doesn't currently support it
1842 DEFINE_CALLSTATICMETHOD(jfloat, Float, T_FLOAT
1843 , HOTSPOT_JNI_CALLSTATICFLOATMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1844 HOTSPOT_JNI_CALLSTATICFLOATMETHOD_RETURN());
1845 DEFINE_CALLSTATICMETHOD(jdouble, Double, T_DOUBLE
1846 , HOTSPOT_JNI_CALLSTATICDOUBLEMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1847 HOTSPOT_JNI_CALLSTATICDOUBLEMETHOD_RETURN());
1848
1849 #define DEFINE_CALLSTATICMETHODV(ResultType, Result, Tag \
1850 , EntryProbe, ResultProbe) \
1851 \
1852 DT_RETURN_MARK_DECL_FOR(Result, CallStatic##Result##MethodV, ResultType \
1853 , ResultProbe); \
1854 \
1855 JNI_ENTRY(ResultType, \
1856 jni_CallStatic##Result##MethodV(JNIEnv *env, jclass cls, jmethodID methodID, va_list args)) \
1857 JNIWrapper("CallStatic" XSTR(Result) "MethodV"); \
1858 \
1859 EntryProbe; \
1860 ResultType ret = 0;\
1861 DT_RETURN_MARK_FOR(Result, CallStatic##Result##MethodV, ResultType, \
1862 (const ResultType&)ret);\
1863 \
1864 JavaValue jvalue(Tag); \
1865 JNI_ArgumentPusherVaArg ap(methodID, args); \
1866 /* Make sure class is initialized before trying to invoke its method */ \
1867 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); \
1868 k->initialize(CHECK_0); \
1869 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK_0); \
1870 va_end(args); \
1871 ret = jvalue.get_##ResultType(); \
1872 return ret;\
1873 JNI_END
1874
1875 // the runtime type of subword integral basic types is integer
1876 DEFINE_CALLSTATICMETHODV(jboolean, Boolean, T_BOOLEAN
1877 , HOTSPOT_JNI_CALLSTATICBOOLEANMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1878 HOTSPOT_JNI_CALLSTATICBOOLEANMETHODV_RETURN(_ret_ref));
1879 DEFINE_CALLSTATICMETHODV(jbyte, Byte, T_BYTE
1880 , HOTSPOT_JNI_CALLSTATICBYTEMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1881 HOTSPOT_JNI_CALLSTATICBYTEMETHODV_RETURN(_ret_ref));
1882 DEFINE_CALLSTATICMETHODV(jchar, Char, T_CHAR
1883 , HOTSPOT_JNI_CALLSTATICCHARMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1884 HOTSPOT_JNI_CALLSTATICCHARMETHODV_RETURN(_ret_ref));
1885 DEFINE_CALLSTATICMETHODV(jshort, Short, T_SHORT
1886 , HOTSPOT_JNI_CALLSTATICSHORTMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1887 HOTSPOT_JNI_CALLSTATICSHORTMETHODV_RETURN(_ret_ref));
1888
1889 DEFINE_CALLSTATICMETHODV(jobject, Object, T_OBJECT
1890 , HOTSPOT_JNI_CALLSTATICOBJECTMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1891 HOTSPOT_JNI_CALLSTATICOBJECTMETHODV_RETURN(_ret_ref));
1892 DEFINE_CALLSTATICMETHODV(jint, Int, T_INT
1893 , HOTSPOT_JNI_CALLSTATICINTMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1894 HOTSPOT_JNI_CALLSTATICINTMETHODV_RETURN(_ret_ref));
1895 DEFINE_CALLSTATICMETHODV(jlong, Long, T_LONG
1896 , HOTSPOT_JNI_CALLSTATICLONGMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1897 HOTSPOT_JNI_CALLSTATICLONGMETHODV_RETURN(_ret_ref));
1898 // Float and double probes don't return value because dtrace doesn't currently support it
1899 DEFINE_CALLSTATICMETHODV(jfloat, Float, T_FLOAT
1900 , HOTSPOT_JNI_CALLSTATICFLOATMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1901 HOTSPOT_JNI_CALLSTATICFLOATMETHODV_RETURN());
1902 DEFINE_CALLSTATICMETHODV(jdouble, Double, T_DOUBLE
1903 , HOTSPOT_JNI_CALLSTATICDOUBLEMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1904 HOTSPOT_JNI_CALLSTATICDOUBLEMETHODV_RETURN());
1905
1906 #define DEFINE_CALLSTATICMETHODA(ResultType, Result, Tag \
1907 , EntryProbe, ResultProbe) \
1908 \
1909 DT_RETURN_MARK_DECL_FOR(Result, CallStatic##Result##MethodA, ResultType \
1910 , ResultProbe); \
1911 \
1912 JNI_ENTRY(ResultType, \
1913 jni_CallStatic##Result##MethodA(JNIEnv *env, jclass cls, jmethodID methodID, const jvalue *args)) \
1914 JNIWrapper("CallStatic" XSTR(Result) "MethodA"); \
1915 \
1916 EntryProbe; \
1917 ResultType ret = 0;\
1918 DT_RETURN_MARK_FOR(Result, CallStatic##Result##MethodA, ResultType, \
1919 (const ResultType&)ret);\
1920 \
1921 JavaValue jvalue(Tag); \
1922 JNI_ArgumentPusherArray ap(methodID, args); \
1923 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK_0); \
1924 ret = jvalue.get_##ResultType(); \
1925 return ret;\
1926 JNI_END
1927
1928 // the runtime type of subword integral basic types is integer
1929 DEFINE_CALLSTATICMETHODA(jboolean, Boolean, T_BOOLEAN
1930 , HOTSPOT_JNI_CALLSTATICBOOLEANMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1931 HOTSPOT_JNI_CALLSTATICBOOLEANMETHODA_RETURN(_ret_ref));
1932 DEFINE_CALLSTATICMETHODA(jbyte, Byte, T_BYTE
1933 , HOTSPOT_JNI_CALLSTATICBYTEMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1934 HOTSPOT_JNI_CALLSTATICBYTEMETHODA_RETURN(_ret_ref));
1935 DEFINE_CALLSTATICMETHODA(jchar, Char, T_CHAR
1936 , HOTSPOT_JNI_CALLSTATICCHARMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1937 HOTSPOT_JNI_CALLSTATICCHARMETHODA_RETURN(_ret_ref));
1938 DEFINE_CALLSTATICMETHODA(jshort, Short, T_SHORT
1939 , HOTSPOT_JNI_CALLSTATICSHORTMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1940 HOTSPOT_JNI_CALLSTATICSHORTMETHODA_RETURN(_ret_ref));
1941
1942 DEFINE_CALLSTATICMETHODA(jobject, Object, T_OBJECT
1943 , HOTSPOT_JNI_CALLSTATICOBJECTMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1944 HOTSPOT_JNI_CALLSTATICOBJECTMETHODA_RETURN(_ret_ref));
1945 DEFINE_CALLSTATICMETHODA(jint, Int, T_INT
1946 , HOTSPOT_JNI_CALLSTATICINTMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1947 HOTSPOT_JNI_CALLSTATICINTMETHODA_RETURN(_ret_ref));
1948 DEFINE_CALLSTATICMETHODA(jlong, Long, T_LONG
1949 , HOTSPOT_JNI_CALLSTATICLONGMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1950 HOTSPOT_JNI_CALLSTATICLONGMETHODA_RETURN(_ret_ref));
1951 // Float and double probes don't return value because dtrace doesn't currently support it
1952 DEFINE_CALLSTATICMETHODA(jfloat, Float, T_FLOAT
1953 , HOTSPOT_JNI_CALLSTATICFLOATMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1954 HOTSPOT_JNI_CALLSTATICFLOATMETHODA_RETURN());
1955 DEFINE_CALLSTATICMETHODA(jdouble, Double, T_DOUBLE
1956 , HOTSPOT_JNI_CALLSTATICDOUBLEMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1957 HOTSPOT_JNI_CALLSTATICDOUBLEMETHODA_RETURN());
1958
1959 DT_VOID_RETURN_MARK_DECL(CallStaticVoidMethod
1960 , HOTSPOT_JNI_CALLSTATICVOIDMETHOD_RETURN());
1961 DT_VOID_RETURN_MARK_DECL(CallStaticVoidMethodV
1962 , HOTSPOT_JNI_CALLSTATICVOIDMETHODV_RETURN());
1963 DT_VOID_RETURN_MARK_DECL(CallStaticVoidMethodA
1964 , HOTSPOT_JNI_CALLSTATICVOIDMETHODA_RETURN());
1965
1966 JNI_ENTRY(void, jni_CallStaticVoidMethod(JNIEnv *env, jclass cls, jmethodID methodID, ...))
1967 JNIWrapper("CallStaticVoidMethod");
1968 HOTSPOT_JNI_CALLSTATICVOIDMETHOD_ENTRY(env, cls, (uintptr_t) methodID);
1969 DT_VOID_RETURN_MARK(CallStaticVoidMethod);
1970
1971 va_list args;
1972 va_start(args, methodID);
1973 JavaValue jvalue(T_VOID);
1974 JNI_ArgumentPusherVaArg ap(methodID, args);
1975 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK);
1976 va_end(args);
1977 JNI_END
1978
1979
1980 JNI_ENTRY(void, jni_CallStaticVoidMethodV(JNIEnv *env, jclass cls, jmethodID methodID, va_list args))
1981 JNIWrapper("CallStaticVoidMethodV");
1982 HOTSPOT_JNI_CALLSTATICVOIDMETHODV_ENTRY(env, cls, (uintptr_t) methodID);
1983 DT_VOID_RETURN_MARK(CallStaticVoidMethodV);
1984
1985 JavaValue jvalue(T_VOID);
1986 JNI_ArgumentPusherVaArg ap(methodID, args);
1987 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK);
1988 JNI_END
1989
1990
1991 JNI_ENTRY(void, jni_CallStaticVoidMethodA(JNIEnv *env, jclass cls, jmethodID methodID, const jvalue *args))
1992 JNIWrapper("CallStaticVoidMethodA");
1993 HOTSPOT_JNI_CALLSTATICVOIDMETHODA_ENTRY(env, cls, (uintptr_t) methodID);
1994 DT_VOID_RETURN_MARK(CallStaticVoidMethodA);
1995
1996 JavaValue jvalue(T_VOID);
1997 JNI_ArgumentPusherArray ap(methodID, args);
1998 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK);
1999 JNI_END
2000
2001
2002 //
2003 // Accessing Fields
2004 //
2005
2006
2007 DT_RETURN_MARK_DECL(GetFieldID, jfieldID
2008 , HOTSPOT_JNI_GETFIELDID_RETURN((uintptr_t)_ret_ref));
2009
2010 JNI_ENTRY(jfieldID, jni_GetFieldID(JNIEnv *env, jclass clazz,
2011 const char *name, const char *sig))
2012 JNIWrapper("GetFieldID");
2013 HOTSPOT_JNI_GETFIELDID_ENTRY(env, clazz, (char *) name, (char *) sig);
2014 jfieldID ret = 0;
2015 DT_RETURN_MARK(GetFieldID, jfieldID, (const jfieldID&)ret);
2016
2017 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz));
2018
2019 // The class should have been loaded (we have an instance of the class
2020 // passed in) so the field and signature should already be in the symbol
2021 // table. If they're not there, the field doesn't exist.
2022 TempNewSymbol fieldname = SymbolTable::probe(name, (int)strlen(name));
2023 TempNewSymbol signame = SymbolTable::probe(sig, (int)strlen(sig));
2024 if (fieldname == NULL || signame == NULL) {
2025 ResourceMark rm;
2026 THROW_MSG_0(vmSymbols::java_lang_NoSuchFieldError(), err_msg("%s.%s %s", k->external_name(), name, sig));
2027 }
2028
2029 // Make sure class is initialized before handing id's out to fields
2030 k->initialize(CHECK_NULL);
2031
2032 fieldDescriptor fd;
2033 if (!k->is_instance_klass() ||
2034 !InstanceKlass::cast(k)->find_field(fieldname, signame, false, &fd)) {
2035 ResourceMark rm;
2036 THROW_MSG_0(vmSymbols::java_lang_NoSuchFieldError(), err_msg("%s.%s %s", k->external_name(), name, sig));
2037 }
2038
2039 // A jfieldID for a non-static field is simply the offset of the field within the instanceOop
2040 // It may also have hash bits for k, if VerifyJNIFields is turned on.
2041 ret = jfieldIDWorkaround::to_instance_jfieldID(k, fd.offset());
2042 return ret;
2043 JNI_END
2044
2045
2046 JNI_ENTRY(jobject, jni_GetObjectField(JNIEnv *env, jobject obj, jfieldID fieldID))
2047 JNIWrapper("GetObjectField");
2048 HOTSPOT_JNI_GETOBJECTFIELD_ENTRY(env, obj, (uintptr_t) fieldID);
2049 oop o = JNIHandles::resolve_non_null(obj);
2050 Klass* k = o->klass();
2051 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID);
2052 // Keep JVMTI addition small and only check enabled flag here.
2053 // jni_GetField_probe() assumes that is okay to create handles.
2054 if (JvmtiExport::should_post_field_access()) {
2055 o = JvmtiExport::jni_GetField_probe(thread, obj, o, k, fieldID, false);
2056 }
2057 oop loaded_obj = HeapAccess<ON_UNKNOWN_OOP_REF>::oop_load_at(o, offset);
2058 jobject ret = JNIHandles::make_local(env, loaded_obj);
2059 HOTSPOT_JNI_GETOBJECTFIELD_RETURN(ret);
2060 return ret;
2061 JNI_END
2062
2063
2064
2065 #define DEFINE_GETFIELD(Return,Fieldname,Result \
2066 , EntryProbe, ReturnProbe) \
2067 \
2068 DT_RETURN_MARK_DECL_FOR(Result, Get##Result##Field, Return \
2069 , ReturnProbe); \
2070 \
2071 JNI_ENTRY_NO_PRESERVE(Return, jni_Get##Result##Field(JNIEnv *env, jobject obj, jfieldID fieldID)) \
2072 JNIWrapper("Get" XSTR(Result) "Field"); \
2073 \
2074 EntryProbe; \
2075 Return ret = 0;\
2076 DT_RETURN_MARK_FOR(Result, Get##Result##Field, Return, (const Return&)ret);\
2077 \
2078 oop o = JNIHandles::resolve_non_null(obj); \
2079 Klass* k = o->klass(); \
2080 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID); \
2081 /* Keep JVMTI addition small and only check enabled flag here. */ \
2082 /* jni_GetField_probe_nh() assumes that is not okay to create handles */ \
2083 /* and creates a ResetNoHandleMark. */ \
2084 if (JvmtiExport::should_post_field_access()) { \
2085 o = JvmtiExport::jni_GetField_probe_nh(thread, obj, o, k, fieldID, false); \
2086 } \
2087 ret = o->Fieldname##_field(offset); \
2088 return ret; \
2089 JNI_END
2090
2091 DEFINE_GETFIELD(jboolean, bool, Boolean
2092 , HOTSPOT_JNI_GETBOOLEANFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2093 HOTSPOT_JNI_GETBOOLEANFIELD_RETURN(_ret_ref))
2094 DEFINE_GETFIELD(jbyte, byte, Byte
2095 , HOTSPOT_JNI_GETBYTEFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2096 HOTSPOT_JNI_GETBYTEFIELD_RETURN(_ret_ref))
2097 DEFINE_GETFIELD(jchar, char, Char
2098 , HOTSPOT_JNI_GETCHARFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2099 HOTSPOT_JNI_GETCHARFIELD_RETURN(_ret_ref))
2100 DEFINE_GETFIELD(jshort, short, Short
2101 , HOTSPOT_JNI_GETSHORTFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2102 HOTSPOT_JNI_GETSHORTFIELD_RETURN(_ret_ref))
2103 DEFINE_GETFIELD(jint, int, Int
2104 , HOTSPOT_JNI_GETINTFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2105 HOTSPOT_JNI_GETINTFIELD_RETURN(_ret_ref))
2106 DEFINE_GETFIELD(jlong, long, Long
2107 , HOTSPOT_JNI_GETLONGFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2108 HOTSPOT_JNI_GETLONGFIELD_RETURN(_ret_ref))
2109 // Float and double probes don't return value because dtrace doesn't currently support it
2110 DEFINE_GETFIELD(jfloat, float, Float
2111 , HOTSPOT_JNI_GETFLOATFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2112 HOTSPOT_JNI_GETFLOATFIELD_RETURN())
2113 DEFINE_GETFIELD(jdouble, double, Double
2114 , HOTSPOT_JNI_GETDOUBLEFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2115 HOTSPOT_JNI_GETDOUBLEFIELD_RETURN())
2116
2117 address jni_GetBooleanField_addr() {
2118 return (address)jni_GetBooleanField;
2119 }
2120 address jni_GetByteField_addr() {
2121 return (address)jni_GetByteField;
2122 }
2123 address jni_GetCharField_addr() {
2124 return (address)jni_GetCharField;
2125 }
2126 address jni_GetShortField_addr() {
2127 return (address)jni_GetShortField;
2128 }
2129 address jni_GetIntField_addr() {
2130 return (address)jni_GetIntField;
2131 }
2132 address jni_GetLongField_addr() {
2133 return (address)jni_GetLongField;
2134 }
2135 address jni_GetFloatField_addr() {
2136 return (address)jni_GetFloatField;
2137 }
2138 address jni_GetDoubleField_addr() {
2139 return (address)jni_GetDoubleField;
2140 }
2141
2142 JNI_ENTRY_NO_PRESERVE(void, jni_SetObjectField(JNIEnv *env, jobject obj, jfieldID fieldID, jobject value))
2143 JNIWrapper("SetObjectField");
2144 HOTSPOT_JNI_SETOBJECTFIELD_ENTRY(env, obj, (uintptr_t) fieldID, value);
2145 oop o = JNIHandles::resolve_non_null(obj);
2146 Klass* k = o->klass();
2147 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID);
2148 // Keep JVMTI addition small and only check enabled flag here.
2149 // jni_SetField_probe_nh() assumes that is not okay to create handles
2150 // and creates a ResetNoHandleMark.
2151 if (JvmtiExport::should_post_field_modification()) {
2152 jvalue field_value;
2153 field_value.l = value;
2154 o = JvmtiExport::jni_SetField_probe_nh(thread, obj, o, k, fieldID, false, 'L', (jvalue *)&field_value);
2155 }
2156 HeapAccess<ON_UNKNOWN_OOP_REF>::oop_store_at(o, offset, JNIHandles::resolve(value));
2157 HOTSPOT_JNI_SETOBJECTFIELD_RETURN();
2158 JNI_END
2159
2160
2161 #define DEFINE_SETFIELD(Argument,Fieldname,Result,SigType,unionType \
2162 , EntryProbe, ReturnProbe) \
2163 \
2164 JNI_ENTRY_NO_PRESERVE(void, jni_Set##Result##Field(JNIEnv *env, jobject obj, jfieldID fieldID, Argument value)) \
2165 JNIWrapper("Set" XSTR(Result) "Field"); \
2166 \
2167 EntryProbe; \
2168 \
2169 oop o = JNIHandles::resolve_non_null(obj); \
2170 Klass* k = o->klass(); \
2171 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID); \
2172 /* Keep JVMTI addition small and only check enabled flag here. */ \
2173 /* jni_SetField_probe_nh() assumes that is not okay to create handles */ \
2174 /* and creates a ResetNoHandleMark. */ \
2175 if (JvmtiExport::should_post_field_modification()) { \
2176 jvalue field_value; \
2177 field_value.unionType = value; \
2178 o = JvmtiExport::jni_SetField_probe_nh(thread, obj, o, k, fieldID, false, SigType, (jvalue *)&field_value); \
2179 } \
2180 if (SigType == 'Z') { value = ((jboolean)value) & 1; } \
2181 o->Fieldname##_field_put(offset, value); \
2182 ReturnProbe; \
2183 JNI_END
2184
2185 DEFINE_SETFIELD(jboolean, bool, Boolean, 'Z', z
2186 , HOTSPOT_JNI_SETBOOLEANFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value),
2187 HOTSPOT_JNI_SETBOOLEANFIELD_RETURN())
2188 DEFINE_SETFIELD(jbyte, byte, Byte, 'B', b
2189 , HOTSPOT_JNI_SETBYTEFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value),
2190 HOTSPOT_JNI_SETBYTEFIELD_RETURN())
2191 DEFINE_SETFIELD(jchar, char, Char, 'C', c
2192 , HOTSPOT_JNI_SETCHARFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value),
2193 HOTSPOT_JNI_SETCHARFIELD_RETURN())
2194 DEFINE_SETFIELD(jshort, short, Short, 'S', s
2195 , HOTSPOT_JNI_SETSHORTFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value),
2196 HOTSPOT_JNI_SETSHORTFIELD_RETURN())
2197 DEFINE_SETFIELD(jint, int, Int, 'I', i
2198 , HOTSPOT_JNI_SETINTFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value),
2199 HOTSPOT_JNI_SETINTFIELD_RETURN())
2200 DEFINE_SETFIELD(jlong, long, Long, 'J', j
2201 , HOTSPOT_JNI_SETLONGFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value),
2202 HOTSPOT_JNI_SETLONGFIELD_RETURN())
2203 // Float and double probes don't return value because dtrace doesn't currently support it
2204 DEFINE_SETFIELD(jfloat, float, Float, 'F', f
2205 , HOTSPOT_JNI_SETFLOATFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2206 HOTSPOT_JNI_SETFLOATFIELD_RETURN())
2207 DEFINE_SETFIELD(jdouble, double, Double, 'D', d
2208 , HOTSPOT_JNI_SETDOUBLEFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2209 HOTSPOT_JNI_SETDOUBLEFIELD_RETURN())
2210
2211 DT_RETURN_MARK_DECL(ToReflectedField, jobject
2212 , HOTSPOT_JNI_TOREFLECTEDFIELD_RETURN(_ret_ref));
2213
2214 JNI_ENTRY(jobject, jni_ToReflectedField(JNIEnv *env, jclass cls, jfieldID fieldID, jboolean isStatic))
2215 JNIWrapper("ToReflectedField");
2216 HOTSPOT_JNI_TOREFLECTEDFIELD_ENTRY(env, cls, (uintptr_t) fieldID, isStatic);
2217 jobject ret = NULL;
2218 DT_RETURN_MARK(ToReflectedField, jobject, (const jobject&)ret);
2219
2220 fieldDescriptor fd;
2221 bool found = false;
2222 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2223
2224 assert(jfieldIDWorkaround::is_static_jfieldID(fieldID) == (isStatic != 0), "invalid fieldID");
2225
2226 if (isStatic) {
2227 // Static field. The fieldID a JNIid specifying the field holder and the offset within the Klass*.
2228 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID);
2229 assert(id->is_static_field_id(), "invalid static field id");
2230 found = id->find_local_field(&fd);
2231 } else {
2232 // Non-static field. The fieldID is really the offset of the field within the instanceOop.
2233 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID);
2234 found = InstanceKlass::cast(k)->find_field_from_offset(offset, false, &fd);
2235 }
2236 assert(found, "bad fieldID passed into jni_ToReflectedField");
2237 oop reflected = Reflection::new_field(&fd, CHECK_NULL);
2238 ret = JNIHandles::make_local(env, reflected);
2239 return ret;
2240 JNI_END
2241
2242
2243 //
2244 // Accessing Static Fields
2245 //
2246 DT_RETURN_MARK_DECL(GetStaticFieldID, jfieldID
2247 , HOTSPOT_JNI_GETSTATICFIELDID_RETURN((uintptr_t)_ret_ref));
2248
2249 JNI_ENTRY(jfieldID, jni_GetStaticFieldID(JNIEnv *env, jclass clazz,
2250 const char *name, const char *sig))
2251 JNIWrapper("GetStaticFieldID");
2252 HOTSPOT_JNI_GETSTATICFIELDID_ENTRY(env, clazz, (char *) name, (char *) sig);
2253 jfieldID ret = NULL;
2254 DT_RETURN_MARK(GetStaticFieldID, jfieldID, (const jfieldID&)ret);
2255
2256 // The class should have been loaded (we have an instance of the class
2257 // passed in) so the field and signature should already be in the symbol
2258 // table. If they're not there, the field doesn't exist.
2259 TempNewSymbol fieldname = SymbolTable::probe(name, (int)strlen(name));
2260 TempNewSymbol signame = SymbolTable::probe(sig, (int)strlen(sig));
2261 if (fieldname == NULL || signame == NULL) {
2262 THROW_MSG_0(vmSymbols::java_lang_NoSuchFieldError(), (char*) name);
2263 }
2264 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz));
2265 // Make sure class is initialized before handing id's out to static fields
2266 k->initialize(CHECK_NULL);
2267
2268 fieldDescriptor fd;
2269 if (!k->is_instance_klass() ||
2270 !InstanceKlass::cast(k)->find_field(fieldname, signame, true, &fd)) {
2271 THROW_MSG_0(vmSymbols::java_lang_NoSuchFieldError(), (char*) name);
2272 }
2273
2274 // A jfieldID for a static field is a JNIid specifying the field holder and the offset within the Klass*
2275 JNIid* id = fd.field_holder()->jni_id_for(fd.offset());
2276 debug_only(id->set_is_static_field_id();)
2277
2278 debug_only(id->verify(fd.field_holder()));
2279
2280 ret = jfieldIDWorkaround::to_static_jfieldID(id);
2281 return ret;
2282 JNI_END
2283
2284
2285 JNI_ENTRY(jobject, jni_GetStaticObjectField(JNIEnv *env, jclass clazz, jfieldID fieldID))
2286 JNIWrapper("GetStaticObjectField");
2287 HOTSPOT_JNI_GETSTATICOBJECTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID);
2288 #if INCLUDE_JNI_CHECK
2289 DEBUG_ONLY(Klass* param_k = jniCheck::validate_class(thread, clazz);)
2290 #endif // INCLUDE_JNI_CHECK
2291 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID);
2292 assert(id->is_static_field_id(), "invalid static field id");
2293 // Keep JVMTI addition small and only check enabled flag here.
2294 // jni_GetField_probe() assumes that is okay to create handles.
2295 if (JvmtiExport::should_post_field_access()) {
2296 JvmtiExport::jni_GetField_probe(thread, NULL, NULL, id->holder(), fieldID, true);
2297 }
2298 jobject ret = JNIHandles::make_local(id->holder()->java_mirror()->obj_field(id->offset()));
2299 HOTSPOT_JNI_GETSTATICOBJECTFIELD_RETURN(ret);
2300 return ret;
2301 JNI_END
2302
2303
2304 #define DEFINE_GETSTATICFIELD(Return,Fieldname,Result \
2305 , EntryProbe, ReturnProbe) \
2306 \
2307 DT_RETURN_MARK_DECL_FOR(Result, GetStatic##Result##Field, Return \
2308 , ReturnProbe); \
2309 \
2310 JNI_ENTRY(Return, jni_GetStatic##Result##Field(JNIEnv *env, jclass clazz, jfieldID fieldID)) \
2311 JNIWrapper("GetStatic" XSTR(Result) "Field"); \
2312 EntryProbe; \
2313 Return ret = 0;\
2314 DT_RETURN_MARK_FOR(Result, GetStatic##Result##Field, Return, \
2315 (const Return&)ret);\
2316 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID); \
2317 assert(id->is_static_field_id(), "invalid static field id"); \
2318 /* Keep JVMTI addition small and only check enabled flag here. */ \
2319 /* jni_GetField_probe() assumes that is okay to create handles. */ \
2320 if (JvmtiExport::should_post_field_access()) { \
2321 JvmtiExport::jni_GetField_probe(thread, NULL, NULL, id->holder(), fieldID, true); \
2322 } \
2323 ret = id->holder()->java_mirror()-> Fieldname##_field (id->offset()); \
2324 return ret;\
2325 JNI_END
2326
2327 DEFINE_GETSTATICFIELD(jboolean, bool, Boolean
2328 , HOTSPOT_JNI_GETSTATICBOOLEANFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICBOOLEANFIELD_RETURN(_ret_ref))
2329 DEFINE_GETSTATICFIELD(jbyte, byte, Byte
2330 , HOTSPOT_JNI_GETSTATICBYTEFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICBYTEFIELD_RETURN(_ret_ref) )
2331 DEFINE_GETSTATICFIELD(jchar, char, Char
2332 , HOTSPOT_JNI_GETSTATICCHARFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICCHARFIELD_RETURN(_ret_ref) )
2333 DEFINE_GETSTATICFIELD(jshort, short, Short
2334 , HOTSPOT_JNI_GETSTATICSHORTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICSHORTFIELD_RETURN(_ret_ref) )
2335 DEFINE_GETSTATICFIELD(jint, int, Int
2336 , HOTSPOT_JNI_GETSTATICINTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICINTFIELD_RETURN(_ret_ref) )
2337 DEFINE_GETSTATICFIELD(jlong, long, Long
2338 , HOTSPOT_JNI_GETSTATICLONGFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICLONGFIELD_RETURN(_ret_ref) )
2339 // Float and double probes don't return value because dtrace doesn't currently support it
2340 DEFINE_GETSTATICFIELD(jfloat, float, Float
2341 , HOTSPOT_JNI_GETSTATICFLOATFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICFLOATFIELD_RETURN() )
2342 DEFINE_GETSTATICFIELD(jdouble, double, Double
2343 , HOTSPOT_JNI_GETSTATICDOUBLEFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICDOUBLEFIELD_RETURN() )
2344
2345 JNI_ENTRY(void, jni_SetStaticObjectField(JNIEnv *env, jclass clazz, jfieldID fieldID, jobject value))
2346 JNIWrapper("SetStaticObjectField");
2347 HOTSPOT_JNI_SETSTATICOBJECTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value);
2348 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID);
2349 assert(id->is_static_field_id(), "invalid static field id");
2350 // Keep JVMTI addition small and only check enabled flag here.
2351 // jni_SetField_probe() assumes that is okay to create handles.
2352 if (JvmtiExport::should_post_field_modification()) {
2353 jvalue field_value;
2354 field_value.l = value;
2355 JvmtiExport::jni_SetField_probe(thread, NULL, NULL, id->holder(), fieldID, true, 'L', (jvalue *)&field_value);
2356 }
2357 id->holder()->java_mirror()->obj_field_put(id->offset(), JNIHandles::resolve(value));
2358 HOTSPOT_JNI_SETSTATICOBJECTFIELD_RETURN();
2359 JNI_END
2360
2361
2362
2363 #define DEFINE_SETSTATICFIELD(Argument,Fieldname,Result,SigType,unionType \
2364 , EntryProbe, ReturnProbe) \
2365 \
2366 JNI_ENTRY(void, jni_SetStatic##Result##Field(JNIEnv *env, jclass clazz, jfieldID fieldID, Argument value)) \
2367 JNIWrapper("SetStatic" XSTR(Result) "Field"); \
2368 EntryProbe; \
2369 \
2370 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID); \
2371 assert(id->is_static_field_id(), "invalid static field id"); \
2372 /* Keep JVMTI addition small and only check enabled flag here. */ \
2373 /* jni_SetField_probe() assumes that is okay to create handles. */ \
2374 if (JvmtiExport::should_post_field_modification()) { \
2375 jvalue field_value; \
2376 field_value.unionType = value; \
2377 JvmtiExport::jni_SetField_probe(thread, NULL, NULL, id->holder(), fieldID, true, SigType, (jvalue *)&field_value); \
2378 } \
2379 if (SigType == 'Z') { value = ((jboolean)value) & 1; } \
2380 id->holder()->java_mirror()-> Fieldname##_field_put (id->offset(), value); \
2381 ReturnProbe;\
2382 JNI_END
2383
2384 DEFINE_SETSTATICFIELD(jboolean, bool, Boolean, 'Z', z
2385 , HOTSPOT_JNI_SETSTATICBOOLEANFIELD_ENTRY(env, clazz, (uintptr_t)fieldID, value),
2386 HOTSPOT_JNI_SETSTATICBOOLEANFIELD_RETURN())
2387 DEFINE_SETSTATICFIELD(jbyte, byte, Byte, 'B', b
2388 , HOTSPOT_JNI_SETSTATICBYTEFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value),
2389 HOTSPOT_JNI_SETSTATICBYTEFIELD_RETURN())
2390 DEFINE_SETSTATICFIELD(jchar, char, Char, 'C', c
2391 , HOTSPOT_JNI_SETSTATICCHARFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value),
2392 HOTSPOT_JNI_SETSTATICCHARFIELD_RETURN())
2393 DEFINE_SETSTATICFIELD(jshort, short, Short, 'S', s
2394 , HOTSPOT_JNI_SETSTATICSHORTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value),
2395 HOTSPOT_JNI_SETSTATICSHORTFIELD_RETURN())
2396 DEFINE_SETSTATICFIELD(jint, int, Int, 'I', i
2397 , HOTSPOT_JNI_SETSTATICINTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value),
2398 HOTSPOT_JNI_SETSTATICINTFIELD_RETURN())
2399 DEFINE_SETSTATICFIELD(jlong, long, Long, 'J', j
2400 , HOTSPOT_JNI_SETSTATICLONGFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value),
2401 HOTSPOT_JNI_SETSTATICLONGFIELD_RETURN())
2402 // Float and double probes don't return value because dtrace doesn't currently support it
2403 DEFINE_SETSTATICFIELD(jfloat, float, Float, 'F', f
2404 , HOTSPOT_JNI_SETSTATICFLOATFIELD_ENTRY(env, clazz, (uintptr_t) fieldID),
2405 HOTSPOT_JNI_SETSTATICFLOATFIELD_RETURN())
2406 DEFINE_SETSTATICFIELD(jdouble, double, Double, 'D', d
2407 , HOTSPOT_JNI_SETSTATICDOUBLEFIELD_ENTRY(env, clazz, (uintptr_t) fieldID),
2408 HOTSPOT_JNI_SETSTATICDOUBLEFIELD_RETURN())
2409
2410 //
2411 // String Operations
2412 //
2413
2414 // Unicode Interface
2415
2416 DT_RETURN_MARK_DECL(NewString, jstring
2417 , HOTSPOT_JNI_NEWSTRING_RETURN(_ret_ref));
2418
2419 JNI_ENTRY(jstring, jni_NewString(JNIEnv *env, const jchar *unicodeChars, jsize len))
2420 JNIWrapper("NewString");
2421 HOTSPOT_JNI_NEWSTRING_ENTRY(env, (uint16_t *) unicodeChars, len);
2422 jstring ret = NULL;
2423 DT_RETURN_MARK(NewString, jstring, (const jstring&)ret);
2424 oop string=java_lang_String::create_oop_from_unicode((jchar*) unicodeChars, len, CHECK_NULL);
2425 ret = (jstring) JNIHandles::make_local(env, string);
2426 return ret;
2427 JNI_END
2428
2429
2430 JNI_ENTRY_NO_PRESERVE(jsize, jni_GetStringLength(JNIEnv *env, jstring string))
2431 JNIWrapper("GetStringLength");
2432 HOTSPOT_JNI_GETSTRINGLENGTH_ENTRY(env, string);
2433 jsize ret = 0;
2434 oop s = JNIHandles::resolve_non_null(string);
2435 ret = java_lang_String::length(s);
2436 HOTSPOT_JNI_GETSTRINGLENGTH_RETURN(ret);
2437 return ret;
2438 JNI_END
2439
2440
2441 JNI_ENTRY_NO_PRESERVE(const jchar*, jni_GetStringChars(
2442 JNIEnv *env, jstring string, jboolean *isCopy))
2443 JNIWrapper("GetStringChars");
2444 HOTSPOT_JNI_GETSTRINGCHARS_ENTRY(env, string, (uintptr_t *) isCopy);
2445 jchar* buf = NULL;
2446 oop s = JNIHandles::resolve_non_null(string);
2447 typeArrayOop s_value = java_lang_String::value(s);
2448 if (s_value != NULL) {
2449 int s_len = java_lang_String::length(s, s_value);
2450 bool is_latin1 = java_lang_String::is_latin1(s);
2451 buf = NEW_C_HEAP_ARRAY_RETURN_NULL(jchar, s_len + 1, mtInternal); // add one for zero termination
2452 /* JNI Specification states return NULL on OOM */
2453 if (buf != NULL) {
2454 if (s_len > 0) {
2455 if (!is_latin1) {
2456 ArrayAccess<>::arraycopy_to_native(s_value, (size_t) typeArrayOopDesc::element_offset<jchar>(0),
2457 buf, s_len);
2458 } else {
2459 for (int i = 0; i < s_len; i++) {
2460 buf[i] = ((jchar) s_value->byte_at(i)) & 0xff;
2461 }
2462 }
2463 }
2464 buf[s_len] = 0;
2465 //%note jni_5
2466 if (isCopy != NULL) {
2467 *isCopy = JNI_TRUE;
2468 }
2469 }
2470 }
2471 HOTSPOT_JNI_GETSTRINGCHARS_RETURN(buf);
2472 return buf;
2473 JNI_END
2474
2475
2476 JNI_ENTRY_NO_PRESERVE(void, jni_ReleaseStringChars(JNIEnv *env, jstring str, const jchar *chars))
2477 JNIWrapper("ReleaseStringChars");
2478 HOTSPOT_JNI_RELEASESTRINGCHARS_ENTRY(env, str, (uint16_t *) chars);
2479 //%note jni_6
2480 if (chars != NULL) {
2481 // Since String objects are supposed to be immutable, don't copy any
2482 // new data back. A bad user will have to go after the char array.
2483 FreeHeap((void*) chars);
2484 }
2485 HOTSPOT_JNI_RELEASESTRINGCHARS_RETURN();
2486 JNI_END
2487
2488
2489 // UTF Interface
2490
2491 DT_RETURN_MARK_DECL(NewStringUTF, jstring
2492 , HOTSPOT_JNI_NEWSTRINGUTF_RETURN(_ret_ref));
2493
2494 JNI_ENTRY(jstring, jni_NewStringUTF(JNIEnv *env, const char *bytes))
2495 JNIWrapper("NewStringUTF");
2496 HOTSPOT_JNI_NEWSTRINGUTF_ENTRY(env, (char *) bytes);
2497 jstring ret;
2498 DT_RETURN_MARK(NewStringUTF, jstring, (const jstring&)ret);
2499
2500 oop result = java_lang_String::create_oop_from_str((char*) bytes, CHECK_NULL);
2501 ret = (jstring) JNIHandles::make_local(env, result);
2502 return ret;
2503 JNI_END
2504
2505
2506 JNI_ENTRY(jsize, jni_GetStringUTFLength(JNIEnv *env, jstring string))
2507 JNIWrapper("GetStringUTFLength");
2508 HOTSPOT_JNI_GETSTRINGUTFLENGTH_ENTRY(env, string);
2509 oop java_string = JNIHandles::resolve_non_null(string);
2510 jsize ret = java_lang_String::utf8_length(java_string);
2511 HOTSPOT_JNI_GETSTRINGUTFLENGTH_RETURN(ret);
2512 return ret;
2513 JNI_END
2514
2515
2516 JNI_ENTRY(const char*, jni_GetStringUTFChars(JNIEnv *env, jstring string, jboolean *isCopy))
2517 JNIWrapper("GetStringUTFChars");
2518 HOTSPOT_JNI_GETSTRINGUTFCHARS_ENTRY(env, string, (uintptr_t *) isCopy);
2519 char* result = NULL;
2520 oop java_string = JNIHandles::resolve_non_null(string);
2521 typeArrayOop s_value = java_lang_String::value(java_string);
2522 if (s_value != NULL) {
2523 size_t length = java_lang_String::utf8_length(java_string, s_value);
2524 /* JNI Specification states return NULL on OOM */
2525 result = AllocateHeap(length + 1, mtInternal, 0, AllocFailStrategy::RETURN_NULL);
2526 if (result != NULL) {
2527 java_lang_String::as_utf8_string(java_string, s_value, result, (int) length + 1);
2528 if (isCopy != NULL) {
2529 *isCopy = JNI_TRUE;
2530 }
2531 }
2532 }
2533 HOTSPOT_JNI_GETSTRINGUTFCHARS_RETURN(result);
2534 return result;
2535 JNI_END
2536
2537
2538 JNI_LEAF(void, jni_ReleaseStringUTFChars(JNIEnv *env, jstring str, const char *chars))
2539 JNIWrapper("ReleaseStringUTFChars");
2540 HOTSPOT_JNI_RELEASESTRINGUTFCHARS_ENTRY(env, str, (char *) chars);
2541 if (chars != NULL) {
2542 FreeHeap((char*) chars);
2543 }
2544 HOTSPOT_JNI_RELEASESTRINGUTFCHARS_RETURN();
2545 JNI_END
2546
2547
2548 JNI_ENTRY_NO_PRESERVE(jsize, jni_GetArrayLength(JNIEnv *env, jarray array))
2549 JNIWrapper("GetArrayLength");
2550 HOTSPOT_JNI_GETARRAYLENGTH_ENTRY(env, array);
2551 arrayOop a = arrayOop(JNIHandles::resolve_non_null(array));
2552 assert(a->is_array(), "must be array");
2553 jsize ret = a->length();
2554 HOTSPOT_JNI_GETARRAYLENGTH_RETURN(ret);
2555 return ret;
2556 JNI_END
2557
2558
2559 //
2560 // Object Array Operations
2561 //
2562
2563 DT_RETURN_MARK_DECL(NewObjectArray, jobjectArray
2564 , HOTSPOT_JNI_NEWOBJECTARRAY_RETURN(_ret_ref));
2565
2566 JNI_ENTRY(jobjectArray, jni_NewObjectArray(JNIEnv *env, jsize length, jclass elementClass, jobject initialElement))
2567 JNIWrapper("NewObjectArray");
2568 HOTSPOT_JNI_NEWOBJECTARRAY_ENTRY(env, length, elementClass, initialElement);
2569 jobjectArray ret = NULL;
2570 DT_RETURN_MARK(NewObjectArray, jobjectArray, (const jobjectArray&)ret);
2571 Klass* ek = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(elementClass));
2572 Klass* ak = ek->array_klass(CHECK_NULL);
2573 ObjArrayKlass::cast(ak)->initialize(CHECK_NULL);
2574 objArrayOop result = ObjArrayKlass::cast(ak)->allocate(length, CHECK_NULL);
2575 oop initial_value = JNIHandles::resolve(initialElement);
2576 if (initial_value != NULL) { // array already initialized with NULL
2577 for (int index = 0; index < length; index++) {
2578 result->obj_at_put(index, initial_value);
2579 }
2580 }
2581 ret = (jobjectArray) JNIHandles::make_local(env, result);
2582 return ret;
2583 JNI_END
2584
2585 DT_RETURN_MARK_DECL(GetObjectArrayElement, jobject
2586 , HOTSPOT_JNI_GETOBJECTARRAYELEMENT_RETURN(_ret_ref));
2587
2588 JNI_ENTRY(jobject, jni_GetObjectArrayElement(JNIEnv *env, jobjectArray array, jsize index))
2589 JNIWrapper("GetObjectArrayElement");
2590 HOTSPOT_JNI_GETOBJECTARRAYELEMENT_ENTRY(env, array, index);
2591 jobject ret = NULL;
2592 DT_RETURN_MARK(GetObjectArrayElement, jobject, (const jobject&)ret);
2593 objArrayOop a = objArrayOop(JNIHandles::resolve_non_null(array));
2594 if (a->is_within_bounds(index)) {
2595 ret = JNIHandles::make_local(env, a->obj_at(index));
2596 return ret;
2597 } else {
2598 ResourceMark rm(THREAD);
2599 stringStream ss;
2600 ss.print("Index %d out of bounds for length %d", index, a->length());
2601 THROW_MSG_0(vmSymbols::java_lang_ArrayIndexOutOfBoundsException(), ss.as_string());
2602 }
2603 JNI_END
2604
2605 DT_VOID_RETURN_MARK_DECL(SetObjectArrayElement
2606 , HOTSPOT_JNI_SETOBJECTARRAYELEMENT_RETURN());
2607
2608 JNI_ENTRY(void, jni_SetObjectArrayElement(JNIEnv *env, jobjectArray array, jsize index, jobject value))
2609 JNIWrapper("SetObjectArrayElement");
2610 HOTSPOT_JNI_SETOBJECTARRAYELEMENT_ENTRY(env, array, index, value);
2611 DT_VOID_RETURN_MARK(SetObjectArrayElement);
2612
2613 objArrayOop a = objArrayOop(JNIHandles::resolve_non_null(array));
2614 oop v = JNIHandles::resolve(value);
2615 if (a->is_within_bounds(index)) {
2616 if (v == NULL || v->is_a(ObjArrayKlass::cast(a->klass())->element_klass())) {
2617 a->obj_at_put(index, v);
2618 } else {
2619 ResourceMark rm(THREAD);
2620 stringStream ss;
2621 Klass *bottom_kl = ObjArrayKlass::cast(a->klass())->bottom_klass();
2622 ss.print("type mismatch: can not store %s to %s[%d]",
2623 v->klass()->external_name(),
2624 bottom_kl->is_typeArray_klass() ? type2name_tab[ArrayKlass::cast(bottom_kl)->element_type()] : bottom_kl->external_name(),
2625 index);
2626 for (int dims = ArrayKlass::cast(a->klass())->dimension(); dims > 1; --dims) {
2627 ss.print("[]");
2628 }
2629 THROW_MSG(vmSymbols::java_lang_ArrayStoreException(), ss.as_string());
2630 }
2631 } else {
2632 ResourceMark rm(THREAD);
2633 stringStream ss;
2634 ss.print("Index %d out of bounds for length %d", index, a->length());
2635 THROW_MSG(vmSymbols::java_lang_ArrayIndexOutOfBoundsException(), ss.as_string());
2636 }
2637 JNI_END
2638
2639
2640
2641 #define DEFINE_NEWSCALARARRAY(Return,Allocator,Result \
2642 ,EntryProbe,ReturnProbe) \
2643 \
2644 DT_RETURN_MARK_DECL(New##Result##Array, Return \
2645 , ReturnProbe); \
2646 \
2647 JNI_ENTRY(Return, \
2648 jni_New##Result##Array(JNIEnv *env, jsize len)) \
2649 JNIWrapper("New" XSTR(Result) "Array"); \
2650 EntryProbe; \
2651 Return ret = NULL;\
2652 DT_RETURN_MARK(New##Result##Array, Return, (const Return&)ret);\
2653 \
2654 oop obj= oopFactory::Allocator(len, CHECK_0); \
2655 ret = (Return) JNIHandles::make_local(env, obj); \
2656 return ret;\
2657 JNI_END
2658
2659 DEFINE_NEWSCALARARRAY(jbooleanArray, new_boolArray, Boolean,
2660 HOTSPOT_JNI_NEWBOOLEANARRAY_ENTRY(env, len),
2661 HOTSPOT_JNI_NEWBOOLEANARRAY_RETURN(_ret_ref))
2662 DEFINE_NEWSCALARARRAY(jbyteArray, new_byteArray, Byte,
2663 HOTSPOT_JNI_NEWBYTEARRAY_ENTRY(env, len),
2664 HOTSPOT_JNI_NEWBYTEARRAY_RETURN(_ret_ref))
2665 DEFINE_NEWSCALARARRAY(jshortArray, new_shortArray, Short,
2666 HOTSPOT_JNI_NEWSHORTARRAY_ENTRY(env, len),
2667 HOTSPOT_JNI_NEWSHORTARRAY_RETURN(_ret_ref))
2668 DEFINE_NEWSCALARARRAY(jcharArray, new_charArray, Char,
2669 HOTSPOT_JNI_NEWCHARARRAY_ENTRY(env, len),
2670 HOTSPOT_JNI_NEWCHARARRAY_RETURN(_ret_ref))
2671 DEFINE_NEWSCALARARRAY(jintArray, new_intArray, Int,
2672 HOTSPOT_JNI_NEWINTARRAY_ENTRY(env, len),
2673 HOTSPOT_JNI_NEWINTARRAY_RETURN(_ret_ref))
2674 DEFINE_NEWSCALARARRAY(jlongArray, new_longArray, Long,
2675 HOTSPOT_JNI_NEWLONGARRAY_ENTRY(env, len),
2676 HOTSPOT_JNI_NEWLONGARRAY_RETURN(_ret_ref))
2677 DEFINE_NEWSCALARARRAY(jfloatArray, new_floatArray, Float,
2678 HOTSPOT_JNI_NEWFLOATARRAY_ENTRY(env, len),
2679 HOTSPOT_JNI_NEWFLOATARRAY_RETURN(_ret_ref))
2680 DEFINE_NEWSCALARARRAY(jdoubleArray, new_doubleArray, Double,
2681 HOTSPOT_JNI_NEWDOUBLEARRAY_ENTRY(env, len),
2682 HOTSPOT_JNI_NEWDOUBLEARRAY_RETURN(_ret_ref))
2683
2684 // Return an address which will fault if the caller writes to it.
2685
2686 static char* get_bad_address() {
2687 static char* bad_address = NULL;
2688 if (bad_address == NULL) {
2689 size_t size = os::vm_allocation_granularity();
2690 bad_address = os::reserve_memory(size);
2691 if (bad_address != NULL) {
2692 os::protect_memory(bad_address, size, os::MEM_PROT_READ,
2693 /*is_committed*/false);
2694 MemTracker::record_virtual_memory_type((void*)bad_address, mtInternal);
2695 }
2696 }
2697 return bad_address;
2698 }
2699
2700
2701
2702 #define DEFINE_GETSCALARARRAYELEMENTS(ElementTag,ElementType,Result, Tag \
2703 , EntryProbe, ReturnProbe) \
2704 \
2705 JNI_ENTRY_NO_PRESERVE(ElementType*, \
2706 jni_Get##Result##ArrayElements(JNIEnv *env, ElementType##Array array, jboolean *isCopy)) \
2707 JNIWrapper("Get" XSTR(Result) "ArrayElements"); \
2708 EntryProbe; \
2709 /* allocate an chunk of memory in c land */ \
2710 typeArrayOop a = typeArrayOop(JNIHandles::resolve_non_null(array)); \
2711 ElementType* result; \
2712 int len = a->length(); \
2713 if (len == 0) { \
2714 if (isCopy != NULL) { \
2715 *isCopy = JNI_FALSE; \
2716 } \
2717 /* Empty array: legal but useless, can't return NULL. \
2718 * Return a pointer to something useless. \
2719 * Avoid asserts in typeArrayOop. */ \
2720 result = (ElementType*)get_bad_address(); \
2721 } else { \
2722 /* JNI Specification states return NULL on OOM */ \
2723 result = NEW_C_HEAP_ARRAY_RETURN_NULL(ElementType, len, mtInternal); \
2724 if (result != NULL) { \
2725 /* copy the array to the c chunk */ \
2726 ArrayAccess<>::arraycopy_to_native(a, typeArrayOopDesc::element_offset<ElementType>(0), \
2727 result, len); \
2728 if (isCopy) { \
2729 *isCopy = JNI_TRUE; \
2730 } \
2731 } \
2732 } \
2733 ReturnProbe; \
2734 return result; \
2735 JNI_END
2736
2737 DEFINE_GETSCALARARRAYELEMENTS(T_BOOLEAN, jboolean, Boolean, bool
2738 , HOTSPOT_JNI_GETBOOLEANARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy),
2739 HOTSPOT_JNI_GETBOOLEANARRAYELEMENTS_RETURN((uintptr_t*)result))
2740 DEFINE_GETSCALARARRAYELEMENTS(T_BYTE, jbyte, Byte, byte
2741 , HOTSPOT_JNI_GETBYTEARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy),
2742 HOTSPOT_JNI_GETBYTEARRAYELEMENTS_RETURN((char*)result))
2743 DEFINE_GETSCALARARRAYELEMENTS(T_SHORT, jshort, Short, short
2744 , HOTSPOT_JNI_GETSHORTARRAYELEMENTS_ENTRY(env, (uint16_t*) array, (uintptr_t *) isCopy),
2745 HOTSPOT_JNI_GETSHORTARRAYELEMENTS_RETURN((uint16_t*)result))
2746 DEFINE_GETSCALARARRAYELEMENTS(T_CHAR, jchar, Char, char
2747 , HOTSPOT_JNI_GETCHARARRAYELEMENTS_ENTRY(env, (uint16_t*) array, (uintptr_t *) isCopy),
2748 HOTSPOT_JNI_GETCHARARRAYELEMENTS_RETURN(result))
2749 DEFINE_GETSCALARARRAYELEMENTS(T_INT, jint, Int, int
2750 , HOTSPOT_JNI_GETINTARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy),
2751 HOTSPOT_JNI_GETINTARRAYELEMENTS_RETURN((uint32_t*)result))
2752 DEFINE_GETSCALARARRAYELEMENTS(T_LONG, jlong, Long, long
2753 , HOTSPOT_JNI_GETLONGARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy),
2754 HOTSPOT_JNI_GETLONGARRAYELEMENTS_RETURN(((uintptr_t*)result)))
2755 // Float and double probes don't return value because dtrace doesn't currently support it
2756 DEFINE_GETSCALARARRAYELEMENTS(T_FLOAT, jfloat, Float, float
2757 , HOTSPOT_JNI_GETFLOATARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy),
2758 HOTSPOT_JNI_GETFLOATARRAYELEMENTS_RETURN(result))
2759 DEFINE_GETSCALARARRAYELEMENTS(T_DOUBLE, jdouble, Double, double
2760 , HOTSPOT_JNI_GETDOUBLEARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy),
2761 HOTSPOT_JNI_GETDOUBLEARRAYELEMENTS_RETURN(result))
2762
2763
2764 #define DEFINE_RELEASESCALARARRAYELEMENTS(ElementTag,ElementType,Result,Tag \
2765 , EntryProbe, ReturnProbe);\
2766 \
2767 JNI_ENTRY_NO_PRESERVE(void, \
2768 jni_Release##Result##ArrayElements(JNIEnv *env, ElementType##Array array, \
2769 ElementType *buf, jint mode)) \
2770 JNIWrapper("Release" XSTR(Result) "ArrayElements"); \
2771 EntryProbe; \
2772 typeArrayOop a = typeArrayOop(JNIHandles::resolve_non_null(array)); \
2773 int len = a->length(); \
2774 if (len != 0) { /* Empty array: nothing to free or copy. */ \
2775 if ((mode == 0) || (mode == JNI_COMMIT)) { \
2776 ArrayAccess<>::arraycopy_from_native(buf, a, typeArrayOopDesc::element_offset<ElementType>(0), len); \
2777 } \
2778 if ((mode == 0) || (mode == JNI_ABORT)) { \
2779 FreeHeap(buf); \
2780 } \
2781 } \
2782 ReturnProbe; \
2783 JNI_END
2784
2785 DEFINE_RELEASESCALARARRAYELEMENTS(T_BOOLEAN, jboolean, Boolean, bool
2786 , HOTSPOT_JNI_RELEASEBOOLEANARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) buf, mode),
2787 HOTSPOT_JNI_RELEASEBOOLEANARRAYELEMENTS_RETURN())
2788 DEFINE_RELEASESCALARARRAYELEMENTS(T_BYTE, jbyte, Byte, byte
2789 , HOTSPOT_JNI_RELEASEBYTEARRAYELEMENTS_ENTRY(env, array, (char *) buf, mode),
2790 HOTSPOT_JNI_RELEASEBYTEARRAYELEMENTS_RETURN())
2791 DEFINE_RELEASESCALARARRAYELEMENTS(T_SHORT, jshort, Short, short
2792 , HOTSPOT_JNI_RELEASESHORTARRAYELEMENTS_ENTRY(env, array, (uint16_t *) buf, mode),
2793 HOTSPOT_JNI_RELEASESHORTARRAYELEMENTS_RETURN())
2794 DEFINE_RELEASESCALARARRAYELEMENTS(T_CHAR, jchar, Char, char
2795 , HOTSPOT_JNI_RELEASECHARARRAYELEMENTS_ENTRY(env, array, (uint16_t *) buf, mode),
2796 HOTSPOT_JNI_RELEASECHARARRAYELEMENTS_RETURN())
2797 DEFINE_RELEASESCALARARRAYELEMENTS(T_INT, jint, Int, int
2798 , HOTSPOT_JNI_RELEASEINTARRAYELEMENTS_ENTRY(env, array, (uint32_t *) buf, mode),
2799 HOTSPOT_JNI_RELEASEINTARRAYELEMENTS_RETURN())
2800 DEFINE_RELEASESCALARARRAYELEMENTS(T_LONG, jlong, Long, long
2801 , HOTSPOT_JNI_RELEASELONGARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) buf, mode),
2802 HOTSPOT_JNI_RELEASELONGARRAYELEMENTS_RETURN())
2803 DEFINE_RELEASESCALARARRAYELEMENTS(T_FLOAT, jfloat, Float, float
2804 , HOTSPOT_JNI_RELEASEFLOATARRAYELEMENTS_ENTRY(env, array, (float *) buf, mode),
2805 HOTSPOT_JNI_RELEASEFLOATARRAYELEMENTS_RETURN())
2806 DEFINE_RELEASESCALARARRAYELEMENTS(T_DOUBLE, jdouble, Double, double
2807 , HOTSPOT_JNI_RELEASEDOUBLEARRAYELEMENTS_ENTRY(env, array, (double *) buf, mode),
2808 HOTSPOT_JNI_RELEASEDOUBLEARRAYELEMENTS_RETURN())
2809
2810 static void check_bounds(jsize start, jsize copy_len, jsize array_len, TRAPS) {
2811 ResourceMark rm(THREAD);
2812 if (copy_len < 0) {
2813 stringStream ss;
2814 ss.print("Length %d is negative", copy_len);
2815 THROW_MSG(vmSymbols::java_lang_ArrayIndexOutOfBoundsException(), ss.as_string());
2816 } else if (start < 0 || (start > array_len - copy_len)) {
2817 stringStream ss;
2818 ss.print("Array region %d.." INT64_FORMAT " out of bounds for length %d",
2819 start, (int64_t)start+(int64_t)copy_len, array_len);
2820 THROW_MSG(vmSymbols::java_lang_ArrayIndexOutOfBoundsException(), ss.as_string());
2821 }
2822 }
2823
2824 #define DEFINE_GETSCALARARRAYREGION(ElementTag,ElementType,Result, Tag \
2825 , EntryProbe, ReturnProbe); \
2826 DT_VOID_RETURN_MARK_DECL(Get##Result##ArrayRegion \
2827 , ReturnProbe); \
2828 \
2829 JNI_ENTRY(void, \
2830 jni_Get##Result##ArrayRegion(JNIEnv *env, ElementType##Array array, jsize start, \
2831 jsize len, ElementType *buf)) \
2832 JNIWrapper("Get" XSTR(Result) "ArrayRegion"); \
2833 EntryProbe; \
2834 DT_VOID_RETURN_MARK(Get##Result##ArrayRegion); \
2835 typeArrayOop src = typeArrayOop(JNIHandles::resolve_non_null(array)); \
2836 check_bounds(start, len, src->length(), CHECK); \
2837 if (len > 0) { \
2838 ArrayAccess<>::arraycopy_to_native(src, typeArrayOopDesc::element_offset<ElementType>(start), buf, len); \
2839 } \
2840 JNI_END
2841
2842 DEFINE_GETSCALARARRAYREGION(T_BOOLEAN, jboolean,Boolean, bool
2843 , HOTSPOT_JNI_GETBOOLEANARRAYREGION_ENTRY(env, array, start, len, (uintptr_t *) buf),
2844 HOTSPOT_JNI_GETBOOLEANARRAYREGION_RETURN());
2845 DEFINE_GETSCALARARRAYREGION(T_BYTE, jbyte, Byte, byte
2846 , HOTSPOT_JNI_GETBYTEARRAYREGION_ENTRY(env, array, start, len, (char *) buf),
2847 HOTSPOT_JNI_GETBYTEARRAYREGION_RETURN());
2848 DEFINE_GETSCALARARRAYREGION(T_SHORT, jshort, Short, short
2849 , HOTSPOT_JNI_GETSHORTARRAYREGION_ENTRY(env, array, start, len, (uint16_t *) buf),
2850 HOTSPOT_JNI_GETSHORTARRAYREGION_RETURN());
2851 DEFINE_GETSCALARARRAYREGION(T_CHAR, jchar, Char, char
2852 , HOTSPOT_JNI_GETCHARARRAYREGION_ENTRY(env, array, start, len, (uint16_t*) buf),
2853 HOTSPOT_JNI_GETCHARARRAYREGION_RETURN());
2854 DEFINE_GETSCALARARRAYREGION(T_INT, jint, Int, int
2855 , HOTSPOT_JNI_GETINTARRAYREGION_ENTRY(env, array, start, len, (uint32_t*) buf),
2856 HOTSPOT_JNI_GETINTARRAYREGION_RETURN());
2857 DEFINE_GETSCALARARRAYREGION(T_LONG, jlong, Long, long
2858 , HOTSPOT_JNI_GETLONGARRAYREGION_ENTRY(env, array, start, len, (uintptr_t *) buf),
2859 HOTSPOT_JNI_GETLONGARRAYREGION_RETURN());
2860 DEFINE_GETSCALARARRAYREGION(T_FLOAT, jfloat, Float, float
2861 , HOTSPOT_JNI_GETFLOATARRAYREGION_ENTRY(env, array, start, len, (float *) buf),
2862 HOTSPOT_JNI_GETFLOATARRAYREGION_RETURN());
2863 DEFINE_GETSCALARARRAYREGION(T_DOUBLE, jdouble, Double, double
2864 , HOTSPOT_JNI_GETDOUBLEARRAYREGION_ENTRY(env, array, start, len, (double *) buf),
2865 HOTSPOT_JNI_GETDOUBLEARRAYREGION_RETURN());
2866
2867
2868 #define DEFINE_SETSCALARARRAYREGION(ElementTag,ElementType,Result, Tag \
2869 , EntryProbe, ReturnProbe); \
2870 DT_VOID_RETURN_MARK_DECL(Set##Result##ArrayRegion \
2871 ,ReturnProbe); \
2872 \
2873 JNI_ENTRY(void, \
2874 jni_Set##Result##ArrayRegion(JNIEnv *env, ElementType##Array array, jsize start, \
2875 jsize len, const ElementType *buf)) \
2876 JNIWrapper("Set" XSTR(Result) "ArrayRegion"); \
2877 EntryProbe; \
2878 DT_VOID_RETURN_MARK(Set##Result##ArrayRegion); \
2879 typeArrayOop dst = typeArrayOop(JNIHandles::resolve_non_null(array)); \
2880 check_bounds(start, len, dst->length(), CHECK); \
2881 if (len > 0) { \
2882 ArrayAccess<>::arraycopy_from_native(buf, dst, typeArrayOopDesc::element_offset<ElementType>(start), len); \
2883 } \
2884 JNI_END
2885
2886 DEFINE_SETSCALARARRAYREGION(T_BOOLEAN, jboolean, Boolean, bool
2887 , HOTSPOT_JNI_SETBOOLEANARRAYREGION_ENTRY(env, array, start, len, (uintptr_t *)buf),
2888 HOTSPOT_JNI_SETBOOLEANARRAYREGION_RETURN())
2889 DEFINE_SETSCALARARRAYREGION(T_BYTE, jbyte, Byte, byte
2890 , HOTSPOT_JNI_SETBYTEARRAYREGION_ENTRY(env, array, start, len, (char *) buf),
2891 HOTSPOT_JNI_SETBYTEARRAYREGION_RETURN())
2892 DEFINE_SETSCALARARRAYREGION(T_SHORT, jshort, Short, short
2893 , HOTSPOT_JNI_SETSHORTARRAYREGION_ENTRY(env, array, start, len, (uint16_t *) buf),
2894 HOTSPOT_JNI_SETSHORTARRAYREGION_RETURN())
2895 DEFINE_SETSCALARARRAYREGION(T_CHAR, jchar, Char, char
2896 , HOTSPOT_JNI_SETCHARARRAYREGION_ENTRY(env, array, start, len, (uint16_t *) buf),
2897 HOTSPOT_JNI_SETCHARARRAYREGION_RETURN())
2898 DEFINE_SETSCALARARRAYREGION(T_INT, jint, Int, int
2899 , HOTSPOT_JNI_SETINTARRAYREGION_ENTRY(env, array, start, len, (uint32_t *) buf),
2900 HOTSPOT_JNI_SETINTARRAYREGION_RETURN())
2901 DEFINE_SETSCALARARRAYREGION(T_LONG, jlong, Long, long
2902 , HOTSPOT_JNI_SETLONGARRAYREGION_ENTRY(env, array, start, len, (uintptr_t *) buf),
2903 HOTSPOT_JNI_SETLONGARRAYREGION_RETURN())
2904 DEFINE_SETSCALARARRAYREGION(T_FLOAT, jfloat, Float, float
2905 , HOTSPOT_JNI_SETFLOATARRAYREGION_ENTRY(env, array, start, len, (float *) buf),
2906 HOTSPOT_JNI_SETFLOATARRAYREGION_RETURN())
2907 DEFINE_SETSCALARARRAYREGION(T_DOUBLE, jdouble, Double, double
2908 , HOTSPOT_JNI_SETDOUBLEARRAYREGION_ENTRY(env, array, start, len, (double *) buf),
2909 HOTSPOT_JNI_SETDOUBLEARRAYREGION_RETURN())
2910
2911
2912 DT_RETURN_MARK_DECL(RegisterNatives, jint
2913 , HOTSPOT_JNI_REGISTERNATIVES_RETURN(_ret_ref));
2914
2915 JNI_ENTRY(jint, jni_RegisterNatives(JNIEnv *env, jclass clazz,
2916 const JNINativeMethod *methods,
2917 jint nMethods))
2918 JNIWrapper("RegisterNatives");
2919 HOTSPOT_JNI_REGISTERNATIVES_ENTRY(env, clazz, (void *) methods, nMethods);
2920 jint ret = 0;
2921 DT_RETURN_MARK(RegisterNatives, jint, (const jint&)ret);
2922
2923 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz));
2924
2925 for (int index = 0; index < nMethods; index++) {
2926 const char* meth_name = methods[index].name;
2927 const char* meth_sig = methods[index].signature;
2928 int meth_name_len = (int)strlen(meth_name);
2929
2930 // The class should have been loaded (we have an instance of the class
2931 // passed in) so the method and signature should already be in the symbol
2932 // table. If they're not there, the method doesn't exist.
2933 TempNewSymbol name = SymbolTable::probe(meth_name, meth_name_len);
2934 TempNewSymbol signature = SymbolTable::probe(meth_sig, (int)strlen(meth_sig));
2935
2936 if (name == NULL || signature == NULL) {
2937 ResourceMark rm;
2938 stringStream st;
2939 st.print("Method %s.%s%s not found", k->external_name(), meth_name, meth_sig);
2940 // Must return negative value on failure
2941 THROW_MSG_(vmSymbols::java_lang_NoSuchMethodError(), st.as_string(), -1);
2942 }
2943
2944 bool res = SystemDictionary::register_native(k, name, signature,
2945 (address) methods[index].fnPtr, THREAD);
2946 if (!res) {
2947 ret = -1;
2948 break;
2949 }
2950 }
2951 return ret;
2952 JNI_END
2953
2954
2955 JNI_ENTRY(jint, jni_UnregisterNatives(JNIEnv *env, jclass clazz))
2956 JNIWrapper("UnregisterNatives");
2957 HOTSPOT_JNI_UNREGISTERNATIVES_ENTRY(env, clazz);
2958 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz));
2959 //%note jni_2
2960 if (k->is_instance_klass()) {
2961 for (int index = 0; index < InstanceKlass::cast(k)->methods()->length(); index++) {
2962 Method* m = InstanceKlass::cast(k)->methods()->at(index);
2963 if (m->is_native()) {
2964 m->clear_native_function();
2965 m->set_signature_handler(NULL);
2966 }
2967 }
2968 }
2969 HOTSPOT_JNI_UNREGISTERNATIVES_RETURN(0);
2970 return 0;
2971 JNI_END
2972
2973 //
2974 // Monitor functions
2975 //
2976
2977 DT_RETURN_MARK_DECL(MonitorEnter, jint
2978 , HOTSPOT_JNI_MONITORENTER_RETURN(_ret_ref));
2979
2980 JNI_ENTRY(jint, jni_MonitorEnter(JNIEnv *env, jobject jobj))
2981 HOTSPOT_JNI_MONITORENTER_ENTRY(env, jobj);
2982 jint ret = JNI_ERR;
2983 DT_RETURN_MARK(MonitorEnter, jint, (const jint&)ret);
2984
2985 // If the object is null, we can't do anything with it
2986 if (jobj == NULL) {
2987 THROW_(vmSymbols::java_lang_NullPointerException(), JNI_ERR);
2988 }
2989
2990 Handle obj(thread, JNIHandles::resolve_non_null(jobj));
2991 ObjectSynchronizer::jni_enter(obj, CHECK_(JNI_ERR));
2992 ret = JNI_OK;
2993 return ret;
2994 JNI_END
2995
2996 DT_RETURN_MARK_DECL(MonitorExit, jint
2997 , HOTSPOT_JNI_MONITOREXIT_RETURN(_ret_ref));
2998
2999 JNI_ENTRY(jint, jni_MonitorExit(JNIEnv *env, jobject jobj))
3000 HOTSPOT_JNI_MONITOREXIT_ENTRY(env, jobj);
3001 jint ret = JNI_ERR;
3002 DT_RETURN_MARK(MonitorExit, jint, (const jint&)ret);
3003
3004 // Don't do anything with a null object
3005 if (jobj == NULL) {
3006 THROW_(vmSymbols::java_lang_NullPointerException(), JNI_ERR);
3007 }
3008
3009 Handle obj(THREAD, JNIHandles::resolve_non_null(jobj));
3010 ObjectSynchronizer::jni_exit(obj(), CHECK_(JNI_ERR));
3011
3012 ret = JNI_OK;
3013 return ret;
3014 JNI_END
3015
3016 //
3017 // Extensions
3018 //
3019
3020 DT_VOID_RETURN_MARK_DECL(GetStringRegion
3021 , HOTSPOT_JNI_GETSTRINGREGION_RETURN());
3022
3023 JNI_ENTRY(void, jni_GetStringRegion(JNIEnv *env, jstring string, jsize start, jsize len, jchar *buf))
3024 JNIWrapper("GetStringRegion");
3025 HOTSPOT_JNI_GETSTRINGREGION_ENTRY(env, string, start, len, buf);
3026 DT_VOID_RETURN_MARK(GetStringRegion);
3027 oop s = JNIHandles::resolve_non_null(string);
3028 typeArrayOop s_value = java_lang_String::value(s);
3029 int s_len = java_lang_String::length(s, s_value);
3030 if (start < 0 || len < 0 || start > s_len - len) {
3031 THROW(vmSymbols::java_lang_StringIndexOutOfBoundsException());
3032 } else {
3033 if (len > 0) {
3034 bool is_latin1 = java_lang_String::is_latin1(s);
3035 if (!is_latin1) {
3036 ArrayAccess<>::arraycopy_to_native(s_value, typeArrayOopDesc::element_offset<jchar>(start),
3037 buf, len);
3038 } else {
3039 for (int i = 0; i < len; i++) {
3040 buf[i] = ((jchar) s_value->byte_at(i + start)) & 0xff;
3041 }
3042 }
3043 }
3044 }
3045 JNI_END
3046
3047 DT_VOID_RETURN_MARK_DECL(GetStringUTFRegion
3048 , HOTSPOT_JNI_GETSTRINGUTFREGION_RETURN());
3049
3050 JNI_ENTRY(void, jni_GetStringUTFRegion(JNIEnv *env, jstring string, jsize start, jsize len, char *buf))
3051 JNIWrapper("GetStringUTFRegion");
3052 HOTSPOT_JNI_GETSTRINGUTFREGION_ENTRY(env, string, start, len, buf);
3053 DT_VOID_RETURN_MARK(GetStringUTFRegion);
3054 oop s = JNIHandles::resolve_non_null(string);
3055 typeArrayOop s_value = java_lang_String::value(s);
3056 int s_len = java_lang_String::length(s, s_value);
3057 if (start < 0 || len < 0 || start > s_len - len) {
3058 THROW(vmSymbols::java_lang_StringIndexOutOfBoundsException());
3059 } else {
3060 //%note jni_7
3061 if (len > 0) {
3062 // Assume the buffer is large enough as the JNI spec. does not require user error checking
3063 java_lang_String::as_utf8_string(s, s_value, start, len, buf, INT_MAX);
3064 // as_utf8_string null-terminates the result string
3065 } else {
3066 // JDK null-terminates the buffer even in len is zero
3067 if (buf != NULL) {
3068 buf[0] = 0;
3069 }
3070 }
3071 }
3072 JNI_END
3073
3074 static oop lock_gc_or_pin_object(JavaThread* thread, jobject obj) {
3075 if (Universe::heap()->supports_object_pinning()) {
3076 const oop o = JNIHandles::resolve_non_null(obj);
3077 return Universe::heap()->pin_object(thread, o);
3078 } else {
3079 GCLocker::lock_critical(thread);
3080 return JNIHandles::resolve_non_null(obj);
3081 }
3082 }
3083
3084 static void unlock_gc_or_unpin_object(JavaThread* thread, jobject obj) {
3085 if (Universe::heap()->supports_object_pinning()) {
3086 const oop o = JNIHandles::resolve_non_null(obj);
3087 return Universe::heap()->unpin_object(thread, o);
3088 } else {
3089 GCLocker::unlock_critical(thread);
3090 }
3091 }
3092
3093 JNI_ENTRY(void*, jni_GetPrimitiveArrayCritical(JNIEnv *env, jarray array, jboolean *isCopy))
3094 JNIWrapper("GetPrimitiveArrayCritical");
3095 HOTSPOT_JNI_GETPRIMITIVEARRAYCRITICAL_ENTRY(env, array, (uintptr_t *) isCopy);
3096 if (isCopy != NULL) {
3097 *isCopy = JNI_FALSE;
3098 }
3099 oop a = lock_gc_or_pin_object(thread, array);
3100 assert(a->is_array(), "just checking");
3101 BasicType type;
3102 if (a->is_objArray()) {
3103 type = T_OBJECT;
3104 } else {
3105 type = TypeArrayKlass::cast(a->klass())->element_type();
3106 }
3107 void* ret = arrayOop(a)->base(type);
3108 HOTSPOT_JNI_GETPRIMITIVEARRAYCRITICAL_RETURN(ret);
3109 return ret;
3110 JNI_END
3111
3112
3113 JNI_ENTRY(void, jni_ReleasePrimitiveArrayCritical(JNIEnv *env, jarray array, void *carray, jint mode))
3114 JNIWrapper("ReleasePrimitiveArrayCritical");
3115 HOTSPOT_JNI_RELEASEPRIMITIVEARRAYCRITICAL_ENTRY(env, array, carray, mode);
3116 unlock_gc_or_unpin_object(thread, array);
3117 HOTSPOT_JNI_RELEASEPRIMITIVEARRAYCRITICAL_RETURN();
3118 JNI_END
3119
3120
3121 JNI_ENTRY(const jchar*, jni_GetStringCritical(JNIEnv *env, jstring string, jboolean *isCopy))
3122 JNIWrapper("GetStringCritical");
3123 HOTSPOT_JNI_GETSTRINGCRITICAL_ENTRY(env, string, (uintptr_t *) isCopy);
3124 oop s = lock_gc_or_pin_object(thread, string);
3125 typeArrayOop s_value = java_lang_String::value(s);
3126 bool is_latin1 = java_lang_String::is_latin1(s);
3127 if (isCopy != NULL) {
3128 *isCopy = is_latin1 ? JNI_TRUE : JNI_FALSE;
3129 }
3130 jchar* ret;
3131 if (!is_latin1) {
3132 ret = (jchar*) s_value->base(T_CHAR);
3133 } else {
3134 // Inflate latin1 encoded string to UTF16
3135 int s_len = java_lang_String::length(s, s_value);
3136 ret = NEW_C_HEAP_ARRAY_RETURN_NULL(jchar, s_len + 1, mtInternal); // add one for zero termination
3137 /* JNI Specification states return NULL on OOM */
3138 if (ret != NULL) {
3139 for (int i = 0; i < s_len; i++) {
3140 ret[i] = ((jchar) s_value->byte_at(i)) & 0xff;
3141 }
3142 ret[s_len] = 0;
3143 }
3144 }
3145 HOTSPOT_JNI_GETSTRINGCRITICAL_RETURN((uint16_t *) ret);
3146 return ret;
3147 JNI_END
3148
3149
3150 JNI_ENTRY(void, jni_ReleaseStringCritical(JNIEnv *env, jstring str, const jchar *chars))
3151 JNIWrapper("ReleaseStringCritical");
3152 HOTSPOT_JNI_RELEASESTRINGCRITICAL_ENTRY(env, str, (uint16_t *) chars);
3153 // The str and chars arguments are ignored for UTF16 strings
3154 oop s = JNIHandles::resolve_non_null(str);
3155 bool is_latin1 = java_lang_String::is_latin1(s);
3156 if (is_latin1) {
3157 // For latin1 string, free jchar array allocated by earlier call to GetStringCritical.
3158 // This assumes that ReleaseStringCritical bookends GetStringCritical.
3159 FREE_C_HEAP_ARRAY(jchar, chars);
3160 }
3161 unlock_gc_or_unpin_object(thread, str);
3162 HOTSPOT_JNI_RELEASESTRINGCRITICAL_RETURN();
3163 JNI_END
3164
3165
3166 JNI_ENTRY(jweak, jni_NewWeakGlobalRef(JNIEnv *env, jobject ref))
3167 JNIWrapper("jni_NewWeakGlobalRef");
3168 HOTSPOT_JNI_NEWWEAKGLOBALREF_ENTRY(env, ref);
3169 Handle ref_handle(thread, JNIHandles::resolve(ref));
3170 jweak ret = JNIHandles::make_weak_global(ref_handle);
3171 HOTSPOT_JNI_NEWWEAKGLOBALREF_RETURN(ret);
3172 return ret;
3173 JNI_END
3174
3175 // Must be JNI_ENTRY (with HandleMark)
3176 JNI_ENTRY(void, jni_DeleteWeakGlobalRef(JNIEnv *env, jweak ref))
3177 JNIWrapper("jni_DeleteWeakGlobalRef");
3178 HOTSPOT_JNI_DELETEWEAKGLOBALREF_ENTRY(env, ref);
3179 JNIHandles::destroy_weak_global(ref);
3180 HOTSPOT_JNI_DELETEWEAKGLOBALREF_RETURN();
3181 JNI_END
3182
3183
3184 JNI_ENTRY_NO_PRESERVE(jboolean, jni_ExceptionCheck(JNIEnv *env))
3185 JNIWrapper("jni_ExceptionCheck");
3186 HOTSPOT_JNI_EXCEPTIONCHECK_ENTRY(env);
3187 jni_check_async_exceptions(thread);
3188 jboolean ret = (thread->has_pending_exception()) ? JNI_TRUE : JNI_FALSE;
3189 HOTSPOT_JNI_EXCEPTIONCHECK_RETURN(ret);
3190 return ret;
3191 JNI_END
3192
3193
3194 // Initialization state for three routines below relating to
3195 // java.nio.DirectBuffers
3196 static int directBufferSupportInitializeStarted = 0;
3197 static volatile int directBufferSupportInitializeEnded = 0;
3198 static volatile int directBufferSupportInitializeFailed = 0;
3199 static jclass bufferClass = NULL;
3200 static jclass directBufferClass = NULL;
3201 static jclass directByteBufferClass = NULL;
3202 static jmethodID directByteBufferConstructor = NULL;
3203 static jfieldID directBufferAddressField = NULL;
3204 static jfieldID bufferCapacityField = NULL;
3205
3206 static jclass lookupOne(JNIEnv* env, const char* name, TRAPS) {
3207 Handle loader; // null (bootstrap) loader
3208 Handle protection_domain; // null protection domain
3209
3210 TempNewSymbol sym = SymbolTable::new_symbol(name);
3211 jclass result = find_class_from_class_loader(env, sym, true, true, loader, protection_domain, true, CHECK_NULL);
3212
3213 if (log_is_enabled(Debug, class, resolve) && result != NULL) {
3214 trace_class_resolution(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(result)));
3215 }
3216 return result;
3217 }
3218
3219 // These lookups are done with the NULL (bootstrap) ClassLoader to
3220 // circumvent any security checks that would be done by jni_FindClass.
3221 JNI_ENTRY(bool, lookupDirectBufferClasses(JNIEnv* env))
3222 {
3223 if ((bufferClass = lookupOne(env, "java/nio/Buffer", thread)) == NULL) { return false; }
3224 if ((directBufferClass = lookupOne(env, "sun/nio/ch/DirectBuffer", thread)) == NULL) { return false; }
3225 if ((directByteBufferClass = lookupOne(env, "java/nio/DirectByteBuffer", thread)) == NULL) { return false; }
3226 return true;
3227 }
3228 JNI_END
3229
3230
3231 static bool initializeDirectBufferSupport(JNIEnv* env, JavaThread* thread) {
3232 if (directBufferSupportInitializeFailed) {
3233 return false;
3234 }
3235
3236 if (Atomic::cmpxchg(1, &directBufferSupportInitializeStarted, 0) == 0) {
3237 if (!lookupDirectBufferClasses(env)) {
3238 directBufferSupportInitializeFailed = 1;
3239 return false;
3240 }
3241
3242 // Make global references for these
3243 bufferClass = (jclass) env->NewGlobalRef(bufferClass);
3244 directBufferClass = (jclass) env->NewGlobalRef(directBufferClass);
3245 directByteBufferClass = (jclass) env->NewGlobalRef(directByteBufferClass);
3246
3247 // Get needed field and method IDs
3248 directByteBufferConstructor = env->GetMethodID(directByteBufferClass, "<init>", "(JI)V");
3249 if (env->ExceptionCheck()) {
3250 env->ExceptionClear();
3251 directBufferSupportInitializeFailed = 1;
3252 return false;
3253 }
3254 directBufferAddressField = env->GetFieldID(bufferClass, "address", "J");
3255 if (env->ExceptionCheck()) {
3256 env->ExceptionClear();
3257 directBufferSupportInitializeFailed = 1;
3258 return false;
3259 }
3260 bufferCapacityField = env->GetFieldID(bufferClass, "capacity", "I");
3261 if (env->ExceptionCheck()) {
3262 env->ExceptionClear();
3263 directBufferSupportInitializeFailed = 1;
3264 return false;
3265 }
3266
3267 if ((directByteBufferConstructor == NULL) ||
3268 (directBufferAddressField == NULL) ||
3269 (bufferCapacityField == NULL)) {
3270 directBufferSupportInitializeFailed = 1;
3271 return false;
3272 }
3273
3274 directBufferSupportInitializeEnded = 1;
3275 } else {
3276 while (!directBufferSupportInitializeEnded && !directBufferSupportInitializeFailed) {
3277 os::naked_yield();
3278 }
3279 }
3280
3281 return !directBufferSupportInitializeFailed;
3282 }
3283
3284 extern "C" jobject JNICALL jni_NewDirectByteBuffer(JNIEnv *env, void* address, jlong capacity)
3285 {
3286 // thread_from_jni_environment() will block if VM is gone.
3287 JavaThread* thread = JavaThread::thread_from_jni_environment(env);
3288
3289 JNIWrapper("jni_NewDirectByteBuffer");
3290 HOTSPOT_JNI_NEWDIRECTBYTEBUFFER_ENTRY(env, address, capacity);
3291
3292 if (!directBufferSupportInitializeEnded) {
3293 if (!initializeDirectBufferSupport(env, thread)) {
3294 HOTSPOT_JNI_NEWDIRECTBYTEBUFFER_RETURN(NULL);
3295 return NULL;
3296 }
3297 }
3298
3299 // Being paranoid about accidental sign extension on address
3300 jlong addr = (jlong) ((uintptr_t) address);
3301 // NOTE that package-private DirectByteBuffer constructor currently
3302 // takes int capacity
3303 jint cap = (jint) capacity;
3304 jobject ret = env->NewObject(directByteBufferClass, directByteBufferConstructor, addr, cap);
3305 HOTSPOT_JNI_NEWDIRECTBYTEBUFFER_RETURN(ret);
3306 return ret;
3307 }
3308
3309 DT_RETURN_MARK_DECL(GetDirectBufferAddress, void*
3310 , HOTSPOT_JNI_GETDIRECTBUFFERADDRESS_RETURN((void*) _ret_ref));
3311
3312 extern "C" void* JNICALL jni_GetDirectBufferAddress(JNIEnv *env, jobject buf)
3313 {
3314 // thread_from_jni_environment() will block if VM is gone.
3315 JavaThread* thread = JavaThread::thread_from_jni_environment(env);
3316
3317 JNIWrapper("jni_GetDirectBufferAddress");
3318 HOTSPOT_JNI_GETDIRECTBUFFERADDRESS_ENTRY(env, buf);
3319 void* ret = NULL;
3320 DT_RETURN_MARK(GetDirectBufferAddress, void*, (const void*&)ret);
3321
3322 if (!directBufferSupportInitializeEnded) {
3323 if (!initializeDirectBufferSupport(env, thread)) {
3324 return 0;
3325 }
3326 }
3327
3328 if ((buf != NULL) && (!env->IsInstanceOf(buf, directBufferClass))) {
3329 return 0;
3330 }
3331
3332 ret = (void*)(intptr_t)env->GetLongField(buf, directBufferAddressField);
3333 return ret;
3334 }
3335
3336 DT_RETURN_MARK_DECL(GetDirectBufferCapacity, jlong
3337 , HOTSPOT_JNI_GETDIRECTBUFFERCAPACITY_RETURN(_ret_ref));
3338
3339 extern "C" jlong JNICALL jni_GetDirectBufferCapacity(JNIEnv *env, jobject buf)
3340 {
3341 // thread_from_jni_environment() will block if VM is gone.
3342 JavaThread* thread = JavaThread::thread_from_jni_environment(env);
3343
3344 JNIWrapper("jni_GetDirectBufferCapacity");
3345 HOTSPOT_JNI_GETDIRECTBUFFERCAPACITY_ENTRY(env, buf);
3346 jlong ret = -1;
3347 DT_RETURN_MARK(GetDirectBufferCapacity, jlong, (const jlong&)ret);
3348
3349 if (!directBufferSupportInitializeEnded) {
3350 if (!initializeDirectBufferSupport(env, thread)) {
3351 ret = 0;
3352 return ret;
3353 }
3354 }
3355
3356 if (buf == NULL) {
3357 return -1;
3358 }
3359
3360 if (!env->IsInstanceOf(buf, directBufferClass)) {
3361 return -1;
3362 }
3363
3364 // NOTE that capacity is currently an int in the implementation
3365 ret = env->GetIntField(buf, bufferCapacityField);
3366 return ret;
3367 }
3368
3369
3370 JNI_LEAF(jint, jni_GetVersion(JNIEnv *env))
3371 JNIWrapper("GetVersion");
3372 HOTSPOT_JNI_GETVERSION_ENTRY(env);
3373 HOTSPOT_JNI_GETVERSION_RETURN(CurrentVersion);
3374 return CurrentVersion;
3375 JNI_END
3376
3377 extern struct JavaVM_ main_vm;
3378
3379 JNI_LEAF(jint, jni_GetJavaVM(JNIEnv *env, JavaVM **vm))
3380 JNIWrapper("jni_GetJavaVM");
3381 HOTSPOT_JNI_GETJAVAVM_ENTRY(env, (void **) vm);
3382 *vm = (JavaVM *)(&main_vm);
3383 HOTSPOT_JNI_GETJAVAVM_RETURN(JNI_OK);
3384 return JNI_OK;
3385 JNI_END
3386
3387
3388 JNI_ENTRY(jobject, jni_GetModule(JNIEnv* env, jclass clazz))
3389 JNIWrapper("GetModule");
3390 return Modules::get_module(clazz, THREAD);
3391 JNI_END
3392
3393
3394 // Structure containing all jni functions
3395 struct JNINativeInterface_ jni_NativeInterface = {
3396 NULL,
3397 NULL,
3398 NULL,
3399
3400 NULL,
3401
3402 jni_GetVersion,
3403
3404 jni_DefineClass,
3405 jni_FindClass,
3406
3407 jni_FromReflectedMethod,
3408 jni_FromReflectedField,
3409
3410 jni_ToReflectedMethod,
3411
3412 jni_GetSuperclass,
3413 jni_IsAssignableFrom,
3414
3415 jni_ToReflectedField,
3416
3417 jni_Throw,
3418 jni_ThrowNew,
3419 jni_ExceptionOccurred,
3420 jni_ExceptionDescribe,
3421 jni_ExceptionClear,
3422 jni_FatalError,
3423
3424 jni_PushLocalFrame,
3425 jni_PopLocalFrame,
3426
3427 jni_NewGlobalRef,
3428 jni_DeleteGlobalRef,
3429 jni_DeleteLocalRef,
3430 jni_IsSameObject,
3431
3432 jni_NewLocalRef,
3433 jni_EnsureLocalCapacity,
3434
3435 jni_AllocObject,
3436 jni_NewObject,
3437 jni_NewObjectV,
3438 jni_NewObjectA,
3439
3440 jni_GetObjectClass,
3441 jni_IsInstanceOf,
3442
3443 jni_GetMethodID,
3444
3445 jni_CallObjectMethod,
3446 jni_CallObjectMethodV,
3447 jni_CallObjectMethodA,
3448 jni_CallBooleanMethod,
3449 jni_CallBooleanMethodV,
3450 jni_CallBooleanMethodA,
3451 jni_CallByteMethod,
3452 jni_CallByteMethodV,
3453 jni_CallByteMethodA,
3454 jni_CallCharMethod,
3455 jni_CallCharMethodV,
3456 jni_CallCharMethodA,
3457 jni_CallShortMethod,
3458 jni_CallShortMethodV,
3459 jni_CallShortMethodA,
3460 jni_CallIntMethod,
3461 jni_CallIntMethodV,
3462 jni_CallIntMethodA,
3463 jni_CallLongMethod,
3464 jni_CallLongMethodV,
3465 jni_CallLongMethodA,
3466 jni_CallFloatMethod,
3467 jni_CallFloatMethodV,
3468 jni_CallFloatMethodA,
3469 jni_CallDoubleMethod,
3470 jni_CallDoubleMethodV,
3471 jni_CallDoubleMethodA,
3472 jni_CallVoidMethod,
3473 jni_CallVoidMethodV,
3474 jni_CallVoidMethodA,
3475
3476 jni_CallNonvirtualObjectMethod,
3477 jni_CallNonvirtualObjectMethodV,
3478 jni_CallNonvirtualObjectMethodA,
3479 jni_CallNonvirtualBooleanMethod,
3480 jni_CallNonvirtualBooleanMethodV,
3481 jni_CallNonvirtualBooleanMethodA,
3482 jni_CallNonvirtualByteMethod,
3483 jni_CallNonvirtualByteMethodV,
3484 jni_CallNonvirtualByteMethodA,
3485 jni_CallNonvirtualCharMethod,
3486 jni_CallNonvirtualCharMethodV,
3487 jni_CallNonvirtualCharMethodA,
3488 jni_CallNonvirtualShortMethod,
3489 jni_CallNonvirtualShortMethodV,
3490 jni_CallNonvirtualShortMethodA,
3491 jni_CallNonvirtualIntMethod,
3492 jni_CallNonvirtualIntMethodV,
3493 jni_CallNonvirtualIntMethodA,
3494 jni_CallNonvirtualLongMethod,
3495 jni_CallNonvirtualLongMethodV,
3496 jni_CallNonvirtualLongMethodA,
3497 jni_CallNonvirtualFloatMethod,
3498 jni_CallNonvirtualFloatMethodV,
3499 jni_CallNonvirtualFloatMethodA,
3500 jni_CallNonvirtualDoubleMethod,
3501 jni_CallNonvirtualDoubleMethodV,
3502 jni_CallNonvirtualDoubleMethodA,
3503 jni_CallNonvirtualVoidMethod,
3504 jni_CallNonvirtualVoidMethodV,
3505 jni_CallNonvirtualVoidMethodA,
3506
3507 jni_GetFieldID,
3508
3509 jni_GetObjectField,
3510 jni_GetBooleanField,
3511 jni_GetByteField,
3512 jni_GetCharField,
3513 jni_GetShortField,
3514 jni_GetIntField,
3515 jni_GetLongField,
3516 jni_GetFloatField,
3517 jni_GetDoubleField,
3518
3519 jni_SetObjectField,
3520 jni_SetBooleanField,
3521 jni_SetByteField,
3522 jni_SetCharField,
3523 jni_SetShortField,
3524 jni_SetIntField,
3525 jni_SetLongField,
3526 jni_SetFloatField,
3527 jni_SetDoubleField,
3528
3529 jni_GetStaticMethodID,
3530
3531 jni_CallStaticObjectMethod,
3532 jni_CallStaticObjectMethodV,
3533 jni_CallStaticObjectMethodA,
3534 jni_CallStaticBooleanMethod,
3535 jni_CallStaticBooleanMethodV,
3536 jni_CallStaticBooleanMethodA,
3537 jni_CallStaticByteMethod,
3538 jni_CallStaticByteMethodV,
3539 jni_CallStaticByteMethodA,
3540 jni_CallStaticCharMethod,
3541 jni_CallStaticCharMethodV,
3542 jni_CallStaticCharMethodA,
3543 jni_CallStaticShortMethod,
3544 jni_CallStaticShortMethodV,
3545 jni_CallStaticShortMethodA,
3546 jni_CallStaticIntMethod,
3547 jni_CallStaticIntMethodV,
3548 jni_CallStaticIntMethodA,
3549 jni_CallStaticLongMethod,
3550 jni_CallStaticLongMethodV,
3551 jni_CallStaticLongMethodA,
3552 jni_CallStaticFloatMethod,
3553 jni_CallStaticFloatMethodV,
3554 jni_CallStaticFloatMethodA,
3555 jni_CallStaticDoubleMethod,
3556 jni_CallStaticDoubleMethodV,
3557 jni_CallStaticDoubleMethodA,
3558 jni_CallStaticVoidMethod,
3559 jni_CallStaticVoidMethodV,
3560 jni_CallStaticVoidMethodA,
3561
3562 jni_GetStaticFieldID,
3563
3564 jni_GetStaticObjectField,
3565 jni_GetStaticBooleanField,
3566 jni_GetStaticByteField,
3567 jni_GetStaticCharField,
3568 jni_GetStaticShortField,
3569 jni_GetStaticIntField,
3570 jni_GetStaticLongField,
3571 jni_GetStaticFloatField,
3572 jni_GetStaticDoubleField,
3573
3574 jni_SetStaticObjectField,
3575 jni_SetStaticBooleanField,
3576 jni_SetStaticByteField,
3577 jni_SetStaticCharField,
3578 jni_SetStaticShortField,
3579 jni_SetStaticIntField,
3580 jni_SetStaticLongField,
3581 jni_SetStaticFloatField,
3582 jni_SetStaticDoubleField,
3583
3584 jni_NewString,
3585 jni_GetStringLength,
3586 jni_GetStringChars,
3587 jni_ReleaseStringChars,
3588
3589 jni_NewStringUTF,
3590 jni_GetStringUTFLength,
3591 jni_GetStringUTFChars,
3592 jni_ReleaseStringUTFChars,
3593
3594 jni_GetArrayLength,
3595
3596 jni_NewObjectArray,
3597 jni_GetObjectArrayElement,
3598 jni_SetObjectArrayElement,
3599
3600 jni_NewBooleanArray,
3601 jni_NewByteArray,
3602 jni_NewCharArray,
3603 jni_NewShortArray,
3604 jni_NewIntArray,
3605 jni_NewLongArray,
3606 jni_NewFloatArray,
3607 jni_NewDoubleArray,
3608
3609 jni_GetBooleanArrayElements,
3610 jni_GetByteArrayElements,
3611 jni_GetCharArrayElements,
3612 jni_GetShortArrayElements,
3613 jni_GetIntArrayElements,
3614 jni_GetLongArrayElements,
3615 jni_GetFloatArrayElements,
3616 jni_GetDoubleArrayElements,
3617
3618 jni_ReleaseBooleanArrayElements,
3619 jni_ReleaseByteArrayElements,
3620 jni_ReleaseCharArrayElements,
3621 jni_ReleaseShortArrayElements,
3622 jni_ReleaseIntArrayElements,
3623 jni_ReleaseLongArrayElements,
3624 jni_ReleaseFloatArrayElements,
3625 jni_ReleaseDoubleArrayElements,
3626
3627 jni_GetBooleanArrayRegion,
3628 jni_GetByteArrayRegion,
3629 jni_GetCharArrayRegion,
3630 jni_GetShortArrayRegion,
3631 jni_GetIntArrayRegion,
3632 jni_GetLongArrayRegion,
3633 jni_GetFloatArrayRegion,
3634 jni_GetDoubleArrayRegion,
3635
3636 jni_SetBooleanArrayRegion,
3637 jni_SetByteArrayRegion,
3638 jni_SetCharArrayRegion,
3639 jni_SetShortArrayRegion,
3640 jni_SetIntArrayRegion,
3641 jni_SetLongArrayRegion,
3642 jni_SetFloatArrayRegion,
3643 jni_SetDoubleArrayRegion,
3644
3645 jni_RegisterNatives,
3646 jni_UnregisterNatives,
3647
3648 jni_MonitorEnter,
3649 jni_MonitorExit,
3650
3651 jni_GetJavaVM,
3652
3653 jni_GetStringRegion,
3654 jni_GetStringUTFRegion,
3655
3656 jni_GetPrimitiveArrayCritical,
3657 jni_ReleasePrimitiveArrayCritical,
3658
3659 jni_GetStringCritical,
3660 jni_ReleaseStringCritical,
3661
3662 jni_NewWeakGlobalRef,
3663 jni_DeleteWeakGlobalRef,
3664
3665 jni_ExceptionCheck,
3666
3667 jni_NewDirectByteBuffer,
3668 jni_GetDirectBufferAddress,
3669 jni_GetDirectBufferCapacity,
3670
3671 // New 1_6 features
3672
3673 jni_GetObjectRefType,
3674
3675 // Module features
3676
3677 jni_GetModule
3678 };
3679
3680
3681 // For jvmti use to modify jni function table.
3682 // Java threads in native contiues to run until it is transitioned
3683 // to VM at safepoint. Before the transition or before it is blocked
3684 // for safepoint it may access jni function table. VM could crash if
3685 // any java thread access the jni function table in the middle of memcpy.
3686 // To avoid this each function pointers are copied automically.
3687 void copy_jni_function_table(const struct JNINativeInterface_ *new_jni_NativeInterface) {
3688 assert(SafepointSynchronize::is_at_safepoint(), "must be at safepoint");
3689 intptr_t *a = (intptr_t *) jni_functions();
3690 intptr_t *b = (intptr_t *) new_jni_NativeInterface;
3691 for (uint i=0; i < sizeof(struct JNINativeInterface_)/sizeof(void *); i++) {
3692 Atomic::store(*b++, a++);
3693 }
3694 }
3695
3696 void quicken_jni_functions() {
3697 // Replace Get<Primitive>Field with fast versions
3698 if (UseFastJNIAccessors && !VerifyJNIFields && !CountJNICalls && !CheckJNICalls) {
3699 address func;
3700 func = JNI_FastGetField::generate_fast_get_boolean_field();
3701 if (func != (address)-1) {
3702 jni_NativeInterface.GetBooleanField = (GetBooleanField_t)func;
3703 }
3704 func = JNI_FastGetField::generate_fast_get_byte_field();
3705 if (func != (address)-1) {
3706 jni_NativeInterface.GetByteField = (GetByteField_t)func;
3707 }
3708 func = JNI_FastGetField::generate_fast_get_char_field();
3709 if (func != (address)-1) {
3710 jni_NativeInterface.GetCharField = (GetCharField_t)func;
3711 }
3712 func = JNI_FastGetField::generate_fast_get_short_field();
3713 if (func != (address)-1) {
3714 jni_NativeInterface.GetShortField = (GetShortField_t)func;
3715 }
3716 func = JNI_FastGetField::generate_fast_get_int_field();
3717 if (func != (address)-1) {
3718 jni_NativeInterface.GetIntField = (GetIntField_t)func;
3719 }
3720 func = JNI_FastGetField::generate_fast_get_long_field();
3721 if (func != (address)-1) {
3722 jni_NativeInterface.GetLongField = (GetLongField_t)func;
3723 }
3724 func = JNI_FastGetField::generate_fast_get_float_field();
3725 if (func != (address)-1) {
3726 jni_NativeInterface.GetFloatField = (GetFloatField_t)func;
3727 }
3728 func = JNI_FastGetField::generate_fast_get_double_field();
3729 if (func != (address)-1) {
3730 jni_NativeInterface.GetDoubleField = (GetDoubleField_t)func;
3731 }
3732 }
3733 }
3734
3735 // Returns the function structure
3736 struct JNINativeInterface_* jni_functions() {
3737 #if INCLUDE_JNI_CHECK
3738 if (CheckJNICalls) return jni_functions_check();
3739 #endif // INCLUDE_JNI_CHECK
3740 return &jni_NativeInterface;
3741 }
3742
3743 // Returns the function structure
3744 struct JNINativeInterface_* jni_functions_nocheck() {
3745 return &jni_NativeInterface;
3746 }
3747
3748 static void post_thread_start_event(const JavaThread* jt) {
3749 assert(jt != NULL, "invariant");
3750 EventThreadStart event;
3751 if (event.should_commit()) {
3752 event.set_thread(JFR_THREAD_ID(jt));
3753 event.commit();
3754 }
3755 }
3756
3757 // Invocation API
3758
3759
3760 // Forward declaration
3761 extern const struct JNIInvokeInterface_ jni_InvokeInterface;
3762
3763 // Global invocation API vars
3764 volatile int vm_created = 0;
3765 // Indicate whether it is safe to recreate VM
3766 volatile int safe_to_recreate_vm = 1;
3767 struct JavaVM_ main_vm = {&jni_InvokeInterface};
3768
3769
3770 #define JAVASTACKSIZE (400 * 1024) /* Default size of a thread java stack */
3771 enum { VERIFY_NONE, VERIFY_REMOTE, VERIFY_ALL };
3772
3773 DT_RETURN_MARK_DECL(GetDefaultJavaVMInitArgs, jint
3774 , HOTSPOT_JNI_GETDEFAULTJAVAVMINITARGS_RETURN(_ret_ref));
3775
3776 _JNI_IMPORT_OR_EXPORT_ jint JNICALL JNI_GetDefaultJavaVMInitArgs(void *args_) {
3777 HOTSPOT_JNI_GETDEFAULTJAVAVMINITARGS_ENTRY(args_);
3778 JDK1_1InitArgs *args = (JDK1_1InitArgs *)args_;
3779 jint ret = JNI_ERR;
3780 DT_RETURN_MARK(GetDefaultJavaVMInitArgs, jint, (const jint&)ret);
3781
3782 if (Threads::is_supported_jni_version(args->version)) {
3783 ret = JNI_OK;
3784 }
3785 // 1.1 style no longer supported in hotspot.
3786 // According the JNI spec, we should update args->version on return.
3787 // We also use the structure to communicate with launcher about default
3788 // stack size.
3789 if (args->version == JNI_VERSION_1_1) {
3790 args->version = JNI_VERSION_1_2;
3791 // javaStackSize is int in arguments structure
3792 assert(jlong(ThreadStackSize) * K < INT_MAX, "integer overflow");
3793 args->javaStackSize = (jint)(ThreadStackSize * K);
3794 }
3795 return ret;
3796 }
3797
3798 DT_RETURN_MARK_DECL(CreateJavaVM, jint
3799 , HOTSPOT_JNI_CREATEJAVAVM_RETURN(_ret_ref));
3800
3801 static jint JNI_CreateJavaVM_inner(JavaVM **vm, void **penv, void *args) {
3802 HOTSPOT_JNI_CREATEJAVAVM_ENTRY((void **) vm, penv, args);
3803
3804 jint result = JNI_ERR;
3805 DT_RETURN_MARK(CreateJavaVM, jint, (const jint&)result);
3806
3807 // We're about to use Atomic::xchg for synchronization. Some Zero
3808 // platforms use the GCC builtin __sync_lock_test_and_set for this,
3809 // but __sync_lock_test_and_set is not guaranteed to do what we want
3810 // on all architectures. So we check it works before relying on it.
3811 #if defined(ZERO) && defined(ASSERT)
3812 {
3813 jint a = 0xcafebabe;
3814 jint b = Atomic::xchg((jint) 0xdeadbeef, &a);
3815 void *c = &a;
3816 void *d = Atomic::xchg(&b, &c);
3817 assert(a == (jint) 0xdeadbeef && b == (jint) 0xcafebabe, "Atomic::xchg() works");
3818 assert(c == &b && d == &a, "Atomic::xchg() works");
3819 }
3820 #endif // ZERO && ASSERT
3821
3822 // At the moment it's only possible to have one Java VM,
3823 // since some of the runtime state is in global variables.
3824
3825 // We cannot use our mutex locks here, since they only work on
3826 // Threads. We do an atomic compare and exchange to ensure only
3827 // one thread can call this method at a time
3828
3829 // We use Atomic::xchg rather than Atomic::add/dec since on some platforms
3830 // the add/dec implementations are dependent on whether we are running
3831 // on a multiprocessor Atomic::xchg does not have this problem.
3832 if (Atomic::xchg(1, &vm_created) == 1) {
3833 return JNI_EEXIST; // already created, or create attempt in progress
3834 }
3835 if (Atomic::xchg(0, &safe_to_recreate_vm) == 0) {
3836 return JNI_ERR; // someone tried and failed and retry not allowed.
3837 }
3838
3839 assert(vm_created == 1, "vm_created is true during the creation");
3840
3841 /**
3842 * Certain errors during initialization are recoverable and do not
3843 * prevent this method from being called again at a later time
3844 * (perhaps with different arguments). However, at a certain
3845 * point during initialization if an error occurs we cannot allow
3846 * this function to be called again (or it will crash). In those
3847 * situations, the 'canTryAgain' flag is set to false, which atomically
3848 * sets safe_to_recreate_vm to 1, such that any new call to
3849 * JNI_CreateJavaVM will immediately fail using the above logic.
3850 */
3851 bool can_try_again = true;
3852
3853 result = Threads::create_vm((JavaVMInitArgs*) args, &can_try_again);
3854 if (result == JNI_OK) {
3855 JavaThread *thread = JavaThread::current();
3856 assert(!thread->has_pending_exception(), "should have returned not OK");
3857 /* thread is thread_in_vm here */
3858 *vm = (JavaVM *)(&main_vm);
3859 *(JNIEnv**)penv = thread->jni_environment();
3860
3861 #if INCLUDE_JVMCI
3862 if (EnableJVMCI) {
3863 if (UseJVMCICompiler) {
3864 // JVMCI is initialized on a CompilerThread
3865 if (BootstrapJVMCI) {
3866 JavaThread* THREAD = thread;
3867 JVMCICompiler* compiler = JVMCICompiler::instance(true, CATCH);
3868 compiler->bootstrap(THREAD);
3869 if (HAS_PENDING_EXCEPTION) {
3870 HandleMark hm;
3871 vm_exit_during_initialization(Handle(THREAD, PENDING_EXCEPTION));
3872 }
3873 }
3874 }
3875 }
3876 #endif
3877
3878 // Notify JVMTI
3879 if (JvmtiExport::should_post_thread_life()) {
3880 JvmtiExport::post_thread_start(thread);
3881 }
3882
3883 post_thread_start_event(thread);
3884
3885 #ifndef PRODUCT
3886 if (ReplayCompiles) ciReplay::replay(thread);
3887
3888 // Some platforms (like Win*) need a wrapper around these test
3889 // functions in order to properly handle error conditions.
3890 VMError::test_error_handler();
3891 #endif
3892
3893 // Since this is not a JVM_ENTRY we have to set the thread state manually before leaving.
3894 ThreadStateTransition::transition(thread, _thread_in_vm, _thread_in_native);
3895 } else {
3896 // If create_vm exits because of a pending exception, exit with that
3897 // exception. In the future when we figure out how to reclaim memory,
3898 // we may be able to exit with JNI_ERR and allow the calling application
3899 // to continue.
3900 if (Universe::is_fully_initialized()) {
3901 // otherwise no pending exception possible - VM will already have aborted
3902 JavaThread* THREAD = JavaThread::current();
3903 if (HAS_PENDING_EXCEPTION) {
3904 HandleMark hm;
3905 vm_exit_during_initialization(Handle(THREAD, PENDING_EXCEPTION));
3906 }
3907 }
3908
3909 if (can_try_again) {
3910 // reset safe_to_recreate_vm to 1 so that retrial would be possible
3911 safe_to_recreate_vm = 1;
3912 }
3913
3914 // Creation failed. We must reset vm_created
3915 *vm = 0;
3916 *(JNIEnv**)penv = 0;
3917 // reset vm_created last to avoid race condition. Use OrderAccess to
3918 // control both compiler and architectural-based reordering.
3919 OrderAccess::release_store(&vm_created, 0);
3920 }
3921
3922 // Flush stdout and stderr before exit.
3923 fflush(stdout);
3924 fflush(stderr);
3925
3926 return result;
3927
3928 }
3929
3930 _JNI_IMPORT_OR_EXPORT_ jint JNICALL JNI_CreateJavaVM(JavaVM **vm, void **penv, void *args) {
3931 jint result = JNI_ERR;
3932 // On Windows, let CreateJavaVM run with SEH protection
3933 #ifdef _WIN32
3934 __try {
3935 #endif
3936 result = JNI_CreateJavaVM_inner(vm, penv, args);
3937 #ifdef _WIN32
3938 } __except(topLevelExceptionFilter((_EXCEPTION_POINTERS*)_exception_info())) {
3939 // Nothing to do.
3940 }
3941 #endif
3942 return result;
3943 }
3944
3945 _JNI_IMPORT_OR_EXPORT_ jint JNICALL JNI_GetCreatedJavaVMs(JavaVM **vm_buf, jsize bufLen, jsize *numVMs) {
3946 // See bug 4367188, the wrapper can sometimes cause VM crashes
3947 // JNIWrapper("GetCreatedJavaVMs");
3948
3949 HOTSPOT_JNI_GETCREATEDJAVAVMS_ENTRY((void **) vm_buf, bufLen, (uintptr_t *) numVMs);
3950
3951 if (vm_created == 1) {
3952 if (numVMs != NULL) *numVMs = 1;
3953 if (bufLen > 0) *vm_buf = (JavaVM *)(&main_vm);
3954 } else {
3955 if (numVMs != NULL) *numVMs = 0;
3956 }
3957 HOTSPOT_JNI_GETCREATEDJAVAVMS_RETURN(JNI_OK);
3958 return JNI_OK;
3959 }
3960
3961 extern "C" {
3962
3963 DT_RETURN_MARK_DECL(DestroyJavaVM, jint
3964 , HOTSPOT_JNI_DESTROYJAVAVM_RETURN(_ret_ref));
3965
3966 static jint JNICALL jni_DestroyJavaVM_inner(JavaVM *vm) {
3967 HOTSPOT_JNI_DESTROYJAVAVM_ENTRY(vm);
3968 jint res = JNI_ERR;
3969 DT_RETURN_MARK(DestroyJavaVM, jint, (const jint&)res);
3970
3971 if (vm_created == 0) {
3972 res = JNI_ERR;
3973 return res;
3974 }
3975
3976 JNIWrapper("DestroyJavaVM");
3977 JNIEnv *env;
3978 JavaVMAttachArgs destroyargs;
3979 destroyargs.version = CurrentVersion;
3980 destroyargs.name = (char *)"DestroyJavaVM";
3981 destroyargs.group = NULL;
3982 res = vm->AttachCurrentThread((void **)&env, (void *)&destroyargs);
3983 if (res != JNI_OK) {
3984 return res;
3985 }
3986
3987 // Since this is not a JVM_ENTRY we have to set the thread state manually before entering.
3988 JavaThread* thread = JavaThread::current();
3989 ThreadStateTransition::transition_from_native(thread, _thread_in_vm);
3990 if (Threads::destroy_vm()) {
3991 // Should not change thread state, VM is gone
3992 vm_created = 0;
3993 res = JNI_OK;
3994 return res;
3995 } else {
3996 ThreadStateTransition::transition(thread, _thread_in_vm, _thread_in_native);
3997 res = JNI_ERR;
3998 return res;
3999 }
4000 }
4001
4002 jint JNICALL jni_DestroyJavaVM(JavaVM *vm) {
4003 jint result = JNI_ERR;
4004 // On Windows, we need SEH protection
4005 #ifdef _WIN32
4006 __try {
4007 #endif
4008 result = jni_DestroyJavaVM_inner(vm);
4009 #ifdef _WIN32
4010 } __except(topLevelExceptionFilter((_EXCEPTION_POINTERS*)_exception_info())) {
4011 // Nothing to do.
4012 }
4013 #endif
4014 return result;
4015 }
4016
4017 static jint attach_current_thread(JavaVM *vm, void **penv, void *_args, bool daemon) {
4018 JavaVMAttachArgs *args = (JavaVMAttachArgs *) _args;
4019
4020 // Check below commented out from JDK1.2fcs as well
4021 /*
4022 if (args && (args->version != JNI_VERSION_1_1 || args->version != JNI_VERSION_1_2)) {
4023 return JNI_EVERSION;
4024 }
4025 */
4026
4027 Thread* t = Thread::current_or_null();
4028 if (t != NULL) {
4029 // If the thread has been attached this operation is a no-op
4030 *(JNIEnv**)penv = ((JavaThread*) t)->jni_environment();
4031 return JNI_OK;
4032 }
4033
4034 // Create a thread and mark it as attaching so it will be skipped by the
4035 // ThreadsListEnumerator - see CR 6404306
4036 JavaThread* thread = new JavaThread(true);
4037
4038 // Set correct safepoint info. The thread is going to call into Java when
4039 // initializing the Java level thread object. Hence, the correct state must
4040 // be set in order for the Safepoint code to deal with it correctly.
4041 thread->set_thread_state(_thread_in_vm);
4042 thread->record_stack_base_and_size();
4043 thread->register_thread_stack_with_NMT();
4044 thread->initialize_thread_current();
4045
4046 if (!os::create_attached_thread(thread)) {
4047 thread->smr_delete();
4048 return JNI_ERR;
4049 }
4050 // Enable stack overflow checks
4051 thread->create_stack_guard_pages();
4052
4053 thread->initialize_tlab();
4054
4055 thread->cache_global_variables();
4056
4057 // This thread will not do a safepoint check, since it has
4058 // not been added to the Thread list yet.
4059 { MutexLocker ml(Threads_lock);
4060 // This must be inside this lock in order to get FullGCALot to work properly, i.e., to
4061 // avoid this thread trying to do a GC before it is added to the thread-list
4062 thread->set_active_handles(JNIHandleBlock::allocate_block());
4063 Threads::add(thread, daemon);
4064 }
4065 // Create thread group and name info from attach arguments
4066 oop group = NULL;
4067 char* thread_name = NULL;
4068 if (args != NULL && Threads::is_supported_jni_version(args->version)) {
4069 group = JNIHandles::resolve(args->group);
4070 thread_name = args->name; // may be NULL
4071 }
4072 if (group == NULL) group = Universe::main_thread_group();
4073
4074 // Create Java level thread object and attach it to this thread
4075 bool attach_failed = false;
4076 {
4077 EXCEPTION_MARK;
4078 HandleMark hm(THREAD);
4079 Handle thread_group(THREAD, group);
4080 thread->allocate_threadObj(thread_group, thread_name, daemon, THREAD);
4081 if (HAS_PENDING_EXCEPTION) {
4082 CLEAR_PENDING_EXCEPTION;
4083 // cleanup outside the handle mark.
4084 attach_failed = true;
4085 }
4086 }
4087
4088 if (attach_failed) {
4089 // Added missing cleanup
4090 thread->cleanup_failed_attach_current_thread(daemon);
4091 return JNI_ERR;
4092 }
4093
4094 // mark the thread as no longer attaching
4095 // this uses a fence to push the change through so we don't have
4096 // to regrab the threads_lock
4097 thread->set_done_attaching_via_jni();
4098
4099 // Set java thread status.
4100 java_lang_Thread::set_thread_status(thread->threadObj(),
4101 java_lang_Thread::RUNNABLE);
4102
4103 // Notify the debugger
4104 if (JvmtiExport::should_post_thread_life()) {
4105 JvmtiExport::post_thread_start(thread);
4106 }
4107
4108 post_thread_start_event(thread);
4109
4110 *(JNIEnv**)penv = thread->jni_environment();
4111
4112 // Now leaving the VM, so change thread_state. This is normally automatically taken care
4113 // of in the JVM_ENTRY. But in this situation we have to do it manually. Notice, that by
4114 // using ThreadStateTransition::transition, we do a callback to the safepoint code if
4115 // needed.
4116
4117 ThreadStateTransition::transition(thread, _thread_in_vm, _thread_in_native);
4118
4119 // Perform any platform dependent FPU setup
4120 os::setup_fpu();
4121
4122 return JNI_OK;
4123 }
4124
4125
4126 jint JNICALL jni_AttachCurrentThread(JavaVM *vm, void **penv, void *_args) {
4127 HOTSPOT_JNI_ATTACHCURRENTTHREAD_ENTRY(vm, penv, _args);
4128 if (vm_created == 0) {
4129 HOTSPOT_JNI_ATTACHCURRENTTHREAD_RETURN((uint32_t) JNI_ERR);
4130 return JNI_ERR;
4131 }
4132
4133 JNIWrapper("AttachCurrentThread");
4134 jint ret = attach_current_thread(vm, penv, _args, false);
4135 HOTSPOT_JNI_ATTACHCURRENTTHREAD_RETURN(ret);
4136 return ret;
4137 }
4138
4139
4140 jint JNICALL jni_DetachCurrentThread(JavaVM *vm) {
4141 HOTSPOT_JNI_DETACHCURRENTTHREAD_ENTRY(vm);
4142
4143 JNIWrapper("DetachCurrentThread");
4144
4145 // If the thread has already been detached the operation is a no-op
4146 if (Thread::current_or_null() == NULL) {
4147 HOTSPOT_JNI_DETACHCURRENTTHREAD_RETURN(JNI_OK);
4148 return JNI_OK;
4149 }
4150
4151 VM_Exit::block_if_vm_exited();
4152
4153 JavaThread* thread = JavaThread::current();
4154 if (thread->has_last_Java_frame()) {
4155 HOTSPOT_JNI_DETACHCURRENTTHREAD_RETURN((uint32_t) JNI_ERR);
4156 // Can't detach a thread that's running java, that can't work.
4157 return JNI_ERR;
4158 }
4159
4160 // Safepoint support. Have to do call-back to safepoint code, if in the
4161 // middle of a safepoint operation
4162 ThreadStateTransition::transition_from_native(thread, _thread_in_vm);
4163
4164 // XXX: Note that JavaThread::exit() call below removes the guards on the
4165 // stack pages set up via enable_stack_{red,yellow}_zone() calls
4166 // above in jni_AttachCurrentThread. Unfortunately, while the setting
4167 // of the guards is visible in jni_AttachCurrentThread above,
4168 // the removal of the guards is buried below in JavaThread::exit()
4169 // here. The abstraction should be more symmetrically either exposed
4170 // or hidden (e.g. it could probably be hidden in the same
4171 // (platform-dependent) methods where we do alternate stack
4172 // maintenance work?)
4173 thread->exit(false, JavaThread::jni_detach);
4174 thread->smr_delete();
4175
4176 HOTSPOT_JNI_DETACHCURRENTTHREAD_RETURN(JNI_OK);
4177 return JNI_OK;
4178 }
4179
4180 DT_RETURN_MARK_DECL(GetEnv, jint
4181 , HOTSPOT_JNI_GETENV_RETURN(_ret_ref));
4182
4183 jint JNICALL jni_GetEnv(JavaVM *vm, void **penv, jint version) {
4184 HOTSPOT_JNI_GETENV_ENTRY(vm, penv, version);
4185 jint ret = JNI_ERR;
4186 DT_RETURN_MARK(GetEnv, jint, (const jint&)ret);
4187
4188 if (vm_created == 0) {
4189 *penv = NULL;
4190 ret = JNI_EDETACHED;
4191 return ret;
4192 }
4193
4194 if (JniExportedInterface::GetExportedInterface(vm, penv, version, &ret)) {
4195 return ret;
4196 }
4197
4198 #ifndef JVMPI_VERSION_1
4199 // need these in order to be polite about older agents
4200 #define JVMPI_VERSION_1 ((jint)0x10000001)
4201 #define JVMPI_VERSION_1_1 ((jint)0x10000002)
4202 #define JVMPI_VERSION_1_2 ((jint)0x10000003)
4203 #endif // !JVMPI_VERSION_1
4204
4205 Thread* thread = Thread::current_or_null();
4206 if (thread != NULL && thread->is_Java_thread()) {
4207 if (Threads::is_supported_jni_version_including_1_1(version)) {
4208 *(JNIEnv**)penv = ((JavaThread*) thread)->jni_environment();
4209 ret = JNI_OK;
4210 return ret;
4211
4212 } else if (version == JVMPI_VERSION_1 ||
4213 version == JVMPI_VERSION_1_1 ||
4214 version == JVMPI_VERSION_1_2) {
4215 tty->print_cr("ERROR: JVMPI, an experimental interface, is no longer supported.");
4216 tty->print_cr("Please use the supported interface: the JVM Tool Interface (JVM TI).");
4217 ret = JNI_EVERSION;
4218 return ret;
4219 } else if (JvmtiExport::is_jvmdi_version(version)) {
4220 tty->print_cr("FATAL ERROR: JVMDI is no longer supported.");
4221 tty->print_cr("Please use the supported interface: the JVM Tool Interface (JVM TI).");
4222 ret = JNI_EVERSION;
4223 return ret;
4224 } else {
4225 *penv = NULL;
4226 ret = JNI_EVERSION;
4227 return ret;
4228 }
4229 } else {
4230 *penv = NULL;
4231 ret = JNI_EDETACHED;
4232 return ret;
4233 }
4234 }
4235
4236
4237 jint JNICALL jni_AttachCurrentThreadAsDaemon(JavaVM *vm, void **penv, void *_args) {
4238 HOTSPOT_JNI_ATTACHCURRENTTHREADASDAEMON_ENTRY(vm, penv, _args);
4239 if (vm_created == 0) {
4240 HOTSPOT_JNI_ATTACHCURRENTTHREADASDAEMON_RETURN((uint32_t) JNI_ERR);
4241 return JNI_ERR;
4242 }
4243
4244 JNIWrapper("AttachCurrentThreadAsDaemon");
4245 jint ret = attach_current_thread(vm, penv, _args, true);
4246 HOTSPOT_JNI_ATTACHCURRENTTHREADASDAEMON_RETURN(ret);
4247 return ret;
4248 }
4249
4250
4251 } // End extern "C"
4252
4253 const struct JNIInvokeInterface_ jni_InvokeInterface = {
4254 NULL,
4255 NULL,
4256 NULL,
4257
4258 jni_DestroyJavaVM,
4259 jni_AttachCurrentThread,
4260 jni_DetachCurrentThread,
4261 jni_GetEnv,
4262 jni_AttachCurrentThreadAsDaemon
4263 };