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 "oops/valueKlass.inline.hpp"
62 #include "prims/jniCheck.hpp"
63 #include "prims/jniExport.hpp"
64 #include "prims/jniFastGetField.hpp"
65 #include "prims/jvm_misc.hpp"
66 #include "prims/jvmtiExport.hpp"
67 #include "prims/jvmtiThreadState.hpp"
68 #include "runtime/atomic.hpp"
69 #include "runtime/compilationPolicy.hpp"
70 #include "runtime/fieldDescriptor.inline.hpp"
71 #include "runtime/handles.inline.hpp"
72 #include "runtime/interfaceSupport.inline.hpp"
73 #include "runtime/java.hpp"
74 #include "runtime/javaCalls.hpp"
75 #include "runtime/jfieldIDWorkaround.hpp"
76 #include "runtime/jniHandles.inline.hpp"
77 #include "runtime/orderAccess.hpp"
78 #include "runtime/reflection.hpp"
79 #include "runtime/safepointVerifiers.hpp"
80 #include "runtime/sharedRuntime.hpp"
81 #include "runtime/signature.hpp"
82 #include "runtime/thread.inline.hpp"
83 #include "runtime/vmOperations.hpp"
84 #include "services/memTracker.hpp"
85 #include "services/runtimeService.hpp"
86 #include "utilities/defaultStream.hpp"
87 #include "utilities/dtrace.hpp"
88 #include "utilities/events.hpp"
89 #include "utilities/histogram.hpp"
90 #include "utilities/macros.hpp"
91 #include "utilities/vmError.hpp"
92
93 static jint CurrentVersion = JNI_VERSION_10;
94
95 #ifdef _WIN32
96 extern LONG WINAPI topLevelExceptionFilter(_EXCEPTION_POINTERS* );
97 #endif
98
99 // The DT_RETURN_MARK macros create a scoped object to fire the dtrace
100 // '-return' probe regardless of the return path is taken out of the function.
101 // Methods that have multiple return paths use this to avoid having to
102 // instrument each return path. Methods that use CHECK or THROW must use this
103 // since those macros can cause an immedate uninstrumented return.
104 //
105 // In order to get the return value, a reference to the variable containing
106 // the return value must be passed to the contructor of the object, and
107 // the return value must be set before return (since the mark object has
108 // a reference to it).
109 //
110 // Example:
111 // DT_RETURN_MARK_DECL(SomeFunc, int);
112 // JNI_ENTRY(int, SomeFunc, ...)
113 // int return_value = 0;
114 // DT_RETURN_MARK(SomeFunc, int, (const int&)return_value);
115 // foo(CHECK_0)
116 // return_value = 5;
117 // return return_value;
118 // JNI_END
119 #define DT_RETURN_MARK_DECL(name, type, probe) \
120 DTRACE_ONLY( \
121 class DTraceReturnProbeMark_##name { \
122 public: \
123 const type& _ret_ref; \
124 DTraceReturnProbeMark_##name(const type& v) : _ret_ref(v) {} \
125 ~DTraceReturnProbeMark_##name() { \
126 probe; \
127 } \
128 } \
129 )
130 // Void functions are simpler since there's no return value
131 #define DT_VOID_RETURN_MARK_DECL(name, probe) \
132 DTRACE_ONLY( \
133 class DTraceReturnProbeMark_##name { \
134 public: \
135 ~DTraceReturnProbeMark_##name() { \
136 probe; \
137 } \
138 } \
139 )
140
141 // Place these macros in the function to mark the return. Non-void
142 // functions need the type and address of the return value.
143 #define DT_RETURN_MARK(name, type, ref) \
144 DTRACE_ONLY( DTraceReturnProbeMark_##name dtrace_return_mark(ref) )
145 #define DT_VOID_RETURN_MARK(name) \
146 DTRACE_ONLY( DTraceReturnProbeMark_##name dtrace_return_mark )
147
148
149 // Use these to select distinct code for floating-point vs. non-floating point
150 // situations. Used from within common macros where we need slightly
151 // different behavior for Float/Double
152 #define FP_SELECT_Boolean(intcode, fpcode) intcode
153 #define FP_SELECT_Byte(intcode, fpcode) intcode
154 #define FP_SELECT_Char(intcode, fpcode) intcode
155 #define FP_SELECT_Short(intcode, fpcode) intcode
156 #define FP_SELECT_Object(intcode, fpcode) intcode
157 #define FP_SELECT_Int(intcode, fpcode) intcode
158 #define FP_SELECT_Long(intcode, fpcode) intcode
159 #define FP_SELECT_Float(intcode, fpcode) fpcode
160 #define FP_SELECT_Double(intcode, fpcode) fpcode
161 #define FP_SELECT(TypeName, intcode, fpcode) \
162 FP_SELECT_##TypeName(intcode, fpcode)
163
164 // Choose DT_RETURN_MARK macros based on the type: float/double -> void
165 // (dtrace doesn't do FP yet)
166 #define DT_RETURN_MARK_DECL_FOR(TypeName, name, type, probe) \
167 FP_SELECT(TypeName, \
168 DT_RETURN_MARK_DECL(name, type, probe), DT_VOID_RETURN_MARK_DECL(name, probe) )
169 #define DT_RETURN_MARK_FOR(TypeName, name, type, ref) \
170 FP_SELECT(TypeName, \
171 DT_RETURN_MARK(name, type, ref), DT_VOID_RETURN_MARK(name) )
172
173
174 // out-of-line helpers for class jfieldIDWorkaround:
175
176 bool jfieldIDWorkaround::is_valid_jfieldID(Klass* k, jfieldID id) {
177 if (jfieldIDWorkaround::is_instance_jfieldID(k, id)) {
178 uintptr_t as_uint = (uintptr_t) id;
179 intptr_t offset = raw_instance_offset(id);
180 if (is_checked_jfieldID(id)) {
181 if (!klass_hash_ok(k, id)) {
182 return false;
183 }
184 }
185 return InstanceKlass::cast(k)->contains_field_offset(offset);
186 } else {
187 JNIid* result = (JNIid*) id;
188 #ifdef ASSERT
189 return result != NULL && result->is_static_field_id();
190 #else
191 return result != NULL;
192 #endif
193 }
194 }
195
196
197 intptr_t jfieldIDWorkaround::encode_klass_hash(Klass* k, intptr_t offset) {
198 if (offset <= small_offset_mask) {
199 Klass* field_klass = k;
200 Klass* super_klass = field_klass->super();
201 // With compressed oops the most super class with nonstatic fields would
202 // be the owner of fields embedded in the header.
203 while (InstanceKlass::cast(super_klass)->has_nonstatic_fields() &&
204 InstanceKlass::cast(super_klass)->contains_field_offset(offset)) {
205 field_klass = super_klass; // super contains the field also
206 super_klass = field_klass->super();
207 }
208 debug_only(NoSafepointVerifier nosafepoint;)
209 uintptr_t klass_hash = field_klass->identity_hash();
210 return ((klass_hash & klass_mask) << klass_shift) | checked_mask_in_place;
211 } else {
212 #if 0
213 #ifndef PRODUCT
214 {
215 ResourceMark rm;
216 warning("VerifyJNIFields: long offset %d in %s", offset, k->external_name());
217 }
218 #endif
219 #endif
220 return 0;
221 }
222 }
223
224 bool jfieldIDWorkaround::klass_hash_ok(Klass* k, jfieldID id) {
225 uintptr_t as_uint = (uintptr_t) id;
226 intptr_t klass_hash = (as_uint >> klass_shift) & klass_mask;
227 do {
228 debug_only(NoSafepointVerifier nosafepoint;)
229 // Could use a non-blocking query for identity_hash here...
230 if ((k->identity_hash() & klass_mask) == klass_hash)
231 return true;
232 k = k->super();
233 } while (k != NULL);
234 return false;
235 }
236
237 void jfieldIDWorkaround::verify_instance_jfieldID(Klass* k, jfieldID id) {
238 guarantee(jfieldIDWorkaround::is_instance_jfieldID(k, id), "must be an instance field" );
239 uintptr_t as_uint = (uintptr_t) id;
240 intptr_t offset = raw_instance_offset(id);
241 if (VerifyJNIFields) {
242 if (is_checked_jfieldID(id)) {
243 guarantee(klass_hash_ok(k, id),
244 "Bug in native code: jfieldID class must match object");
245 } else {
246 #if 0
247 #ifndef PRODUCT
248 if (Verbose) {
249 ResourceMark rm;
250 warning("VerifyJNIFields: unverified offset %d for %s", offset, k->external_name());
251 }
252 #endif
253 #endif
254 }
255 }
256 guarantee(InstanceKlass::cast(k)->contains_field_offset(offset),
257 "Bug in native code: jfieldID offset must address interior of object");
258 }
259
260 // Wrapper to trace JNI functions
261
262 #ifdef ASSERT
263 Histogram* JNIHistogram;
264 static volatile int JNIHistogram_lock = 0;
265
266 class JNIHistogramElement : public HistogramElement {
267 public:
268 JNIHistogramElement(const char* name);
269 };
270
271 JNIHistogramElement::JNIHistogramElement(const char* elementName) {
272 _name = elementName;
273 uintx count = 0;
274
275 while (Atomic::cmpxchg(1, &JNIHistogram_lock, 0) != 0) {
276 while (OrderAccess::load_acquire(&JNIHistogram_lock) != 0) {
277 count +=1;
278 if ( (WarnOnStalledSpinLock > 0)
279 && (count % WarnOnStalledSpinLock == 0)) {
280 warning("JNIHistogram_lock seems to be stalled");
281 }
282 }
283 }
284
285
286 if(JNIHistogram == NULL)
287 JNIHistogram = new Histogram("JNI Call Counts",100);
288
289 JNIHistogram->add_element(this);
290 Atomic::dec(&JNIHistogram_lock);
291 }
292
293 #define JNICountWrapper(arg) \
294 static JNIHistogramElement* e = new JNIHistogramElement(arg); \
295 /* There is a MT-race condition in VC++. So we need to make sure that that e has been initialized */ \
296 if (e != NULL) e->increment_count()
297 #define JNIWrapper(arg) JNICountWrapper(arg);
298 #else
299 #define JNIWrapper(arg)
300 #endif
301
302
303 // Implementation of JNI entries
304
305 DT_RETURN_MARK_DECL(DefineClass, jclass
306 , HOTSPOT_JNI_DEFINECLASS_RETURN(_ret_ref));
307
308 JNI_ENTRY(jclass, jni_DefineClass(JNIEnv *env, const char *name, jobject loaderRef,
309 const jbyte *buf, jsize bufLen))
310 JNIWrapper("DefineClass");
311
312 HOTSPOT_JNI_DEFINECLASS_ENTRY(
313 env, (char*) name, loaderRef, (char*) buf, bufLen);
314
315 jclass cls = NULL;
316 DT_RETURN_MARK(DefineClass, jclass, (const jclass&)cls);
317
318 TempNewSymbol class_name = NULL;
319 // Since exceptions can be thrown, class initialization can take place
320 // if name is NULL no check for class name in .class stream has to be made.
321 if (name != NULL) {
322 const int str_len = (int)strlen(name);
323 if (str_len > Symbol::max_length()) {
324 // It's impossible to create this class; the name cannot fit
325 // into the constant pool.
326 Exceptions::fthrow(THREAD_AND_LOCATION,
327 vmSymbols::java_lang_NoClassDefFoundError(),
328 "Class name exceeds maximum length of %d: %s",
329 Symbol::max_length(),
330 name);
331 return 0;
332 }
333 class_name = SymbolTable::new_symbol(name);
334 }
335 ResourceMark rm(THREAD);
336 ClassFileStream st((u1*)buf, bufLen, NULL, ClassFileStream::verify);
337 Handle class_loader (THREAD, JNIHandles::resolve(loaderRef));
338
339 if (UsePerfData && !class_loader.is_null()) {
340 // check whether the current caller thread holds the lock or not.
341 // If not, increment the corresponding counter
342 if (ObjectSynchronizer::
343 query_lock_ownership((JavaThread*)THREAD, class_loader) !=
344 ObjectSynchronizer::owner_self) {
345 ClassLoader::sync_JNIDefineClassLockFreeCounter()->inc();
346 }
347 }
348 Klass* k = SystemDictionary::resolve_from_stream(class_name,
349 class_loader,
350 Handle(),
351 &st,
352 CHECK_NULL);
353
354 if (log_is_enabled(Debug, class, resolve) && k != NULL) {
355 trace_class_resolution(k);
356 }
357
358 cls = (jclass)JNIHandles::make_local(
359 env, k->java_mirror());
360 return cls;
361 JNI_END
362
363
364
365 DT_RETURN_MARK_DECL(FindClass, jclass
366 , HOTSPOT_JNI_FINDCLASS_RETURN(_ret_ref));
367
368 JNI_ENTRY(jclass, jni_FindClass(JNIEnv *env, const char *name))
369 JNIWrapper("FindClass");
370
371 HOTSPOT_JNI_FINDCLASS_ENTRY(env, (char *)name);
372
373 jclass result = NULL;
374 DT_RETURN_MARK(FindClass, jclass, (const jclass&)result);
375
376 // Sanity check the name: it cannot be null or larger than the maximum size
377 // name we can fit in the constant pool.
378 if (name == NULL) {
379 THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), "No class name given");
380 }
381 if ((int)strlen(name) > Symbol::max_length()) {
382 Exceptions::fthrow(THREAD_AND_LOCATION,
383 vmSymbols::java_lang_NoClassDefFoundError(),
384 "Class name exceeds maximum length of %d: %s",
385 Symbol::max_length(),
386 name);
387 return 0;
388 }
389
390 //%note jni_3
391 Handle protection_domain;
392 // Find calling class
393 Klass* k = thread->security_get_caller_class(0);
394 // default to the system loader when no context
395 Handle loader(THREAD, SystemDictionary::java_system_loader());
396 if (k != NULL) {
397 // Special handling to make sure JNI_OnLoad and JNI_OnUnload are executed
398 // in the correct class context.
399 if (k->class_loader() == NULL &&
400 k->name() == vmSymbols::java_lang_ClassLoader_NativeLibrary()) {
401 JavaValue result(T_OBJECT);
402 JavaCalls::call_static(&result, k,
403 vmSymbols::getFromClass_name(),
404 vmSymbols::void_class_signature(),
405 CHECK_NULL);
406 // When invoked from JNI_OnLoad, NativeLibrary::getFromClass returns
407 // a non-NULL Class object. When invoked from JNI_OnUnload,
408 // it will return NULL to indicate no context.
409 oop mirror = (oop) result.get_jobject();
410 if (mirror != NULL) {
411 Klass* fromClass = java_lang_Class::as_Klass(mirror);
412 loader = Handle(THREAD, fromClass->class_loader());
413 protection_domain = Handle(THREAD, fromClass->protection_domain());
414 }
415 } else {
416 loader = Handle(THREAD, k->class_loader());
417 }
418 }
419
420 TempNewSymbol sym = SymbolTable::new_symbol(name);
421 result = find_class_from_class_loader(env, sym, true, true, loader,
422 protection_domain, true, thread);
423
424 if (log_is_enabled(Debug, class, resolve) && result != NULL) {
425 trace_class_resolution(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(result)));
426 }
427
428 return result;
429 JNI_END
430
431 DT_RETURN_MARK_DECL(FromReflectedMethod, jmethodID
432 , HOTSPOT_JNI_FROMREFLECTEDMETHOD_RETURN((uintptr_t)_ret_ref));
433
434 JNI_ENTRY(jmethodID, jni_FromReflectedMethod(JNIEnv *env, jobject method))
435 JNIWrapper("FromReflectedMethod");
436
437 HOTSPOT_JNI_FROMREFLECTEDMETHOD_ENTRY(env, method);
438
439 jmethodID ret = NULL;
440 DT_RETURN_MARK(FromReflectedMethod, jmethodID, (const jmethodID&)ret);
441
442 // method is a handle to a java.lang.reflect.Method object
443 oop reflected = JNIHandles::resolve_non_null(method);
444 oop mirror = NULL;
445 int slot = 0;
446
447 if (reflected->klass() == SystemDictionary::reflect_Constructor_klass()) {
448 mirror = java_lang_reflect_Constructor::clazz(reflected);
449 slot = java_lang_reflect_Constructor::slot(reflected);
450 } else {
451 assert(reflected->klass() == SystemDictionary::reflect_Method_klass(), "wrong type");
452 mirror = java_lang_reflect_Method::clazz(reflected);
453 slot = java_lang_reflect_Method::slot(reflected);
454 }
455 Klass* k1 = java_lang_Class::as_Klass(mirror);
456
457 // Make sure class is initialized before handing id's out to methods
458 k1->initialize(CHECK_NULL);
459 Method* m = InstanceKlass::cast(k1)->method_with_idnum(slot);
460 ret = m==NULL? NULL : m->jmethod_id(); // return NULL if reflected method deleted
461 return ret;
462 JNI_END
463
464 DT_RETURN_MARK_DECL(FromReflectedField, jfieldID
465 , HOTSPOT_JNI_FROMREFLECTEDFIELD_RETURN((uintptr_t)_ret_ref));
466
467 JNI_ENTRY(jfieldID, jni_FromReflectedField(JNIEnv *env, jobject field))
468 JNIWrapper("FromReflectedField");
469
470 HOTSPOT_JNI_FROMREFLECTEDFIELD_ENTRY(env, field);
471
472 jfieldID ret = NULL;
473 DT_RETURN_MARK(FromReflectedField, jfieldID, (const jfieldID&)ret);
474
475 // field is a handle to a java.lang.reflect.Field object
476 oop reflected = JNIHandles::resolve_non_null(field);
477 oop mirror = java_lang_reflect_Field::clazz(reflected);
478 Klass* k1 = java_lang_Class::as_Klass(mirror);
479 int slot = java_lang_reflect_Field::slot(reflected);
480 int modifiers = java_lang_reflect_Field::modifiers(reflected);
481
482 // Make sure class is initialized before handing id's out to fields
483 k1->initialize(CHECK_NULL);
484
485 // First check if this is a static field
486 if (modifiers & JVM_ACC_STATIC) {
487 intptr_t offset = InstanceKlass::cast(k1)->field_offset( slot );
488 JNIid* id = InstanceKlass::cast(k1)->jni_id_for(offset);
489 assert(id != NULL, "corrupt Field object");
490 debug_only(id->set_is_static_field_id();)
491 // A jfieldID for a static field is a JNIid specifying the field holder and the offset within the Klass*
492 ret = jfieldIDWorkaround::to_static_jfieldID(id);
493 return ret;
494 }
495
496 // The slot is the index of the field description in the field-array
497 // The jfieldID is the offset of the field within the object
498 // It may also have hash bits for k, if VerifyJNIFields is turned on.
499 intptr_t offset = InstanceKlass::cast(k1)->field_offset( slot );
500 assert(InstanceKlass::cast(k1)->contains_field_offset(offset), "stay within object");
501 ret = jfieldIDWorkaround::to_instance_jfieldID(k1, offset);
502 return ret;
503 JNI_END
504
505
506 DT_RETURN_MARK_DECL(ToReflectedMethod, jobject
507 , HOTSPOT_JNI_TOREFLECTEDMETHOD_RETURN(_ret_ref));
508
509 JNI_ENTRY(jobject, jni_ToReflectedMethod(JNIEnv *env, jclass cls, jmethodID method_id, jboolean isStatic))
510 JNIWrapper("ToReflectedMethod");
511
512 HOTSPOT_JNI_TOREFLECTEDMETHOD_ENTRY(env, cls, (uintptr_t) method_id, isStatic);
513
514 jobject ret = NULL;
515 DT_RETURN_MARK(ToReflectedMethod, jobject, (const jobject&)ret);
516
517 methodHandle m (THREAD, Method::resolve_jmethod_id(method_id));
518 assert(m->is_static() == (isStatic != 0), "jni_ToReflectedMethod access flags doesn't match");
519 oop reflection_method;
520 if (m->is_object_constructor()) {
521 reflection_method = Reflection::new_constructor(m, CHECK_NULL);
522 } else {
523 reflection_method = Reflection::new_method(m, false, CHECK_NULL);
524 }
525 ret = JNIHandles::make_local(env, reflection_method);
526 return ret;
527 JNI_END
528
529 DT_RETURN_MARK_DECL(GetSuperclass, jclass
530 , HOTSPOT_JNI_GETSUPERCLASS_RETURN(_ret_ref));
531
532 JNI_ENTRY(jclass, jni_GetSuperclass(JNIEnv *env, jclass sub))
533 JNIWrapper("GetSuperclass");
534
535 HOTSPOT_JNI_GETSUPERCLASS_ENTRY(env, sub);
536
537 jclass obj = NULL;
538 DT_RETURN_MARK(GetSuperclass, jclass, (const jclass&)obj);
539
540 oop mirror = JNIHandles::resolve_non_null(sub);
541 // primitive classes return NULL
542 if (java_lang_Class::is_primitive(mirror)) return NULL;
543
544 // Rules of Class.getSuperClass as implemented by KLass::java_super:
545 // arrays return Object
546 // interfaces return NULL
547 // proper classes return Klass::super()
548 Klass* k = java_lang_Class::as_Klass(mirror);
549 if (k->is_interface()) return NULL;
550
551 // return mirror for superclass
552 Klass* super = k->java_super();
553 // super2 is the value computed by the compiler's getSuperClass intrinsic:
554 debug_only(Klass* super2 = ( k->is_array_klass()
555 ? SystemDictionary::Object_klass()
556 : k->super() ) );
557 assert(super == super2,
558 "java_super computation depends on interface, array, other super");
559 obj = (super == NULL) ? NULL : (jclass) JNIHandles::make_local(super->java_mirror());
560 return obj;
561 JNI_END
562
563 JNI_ENTRY_NO_PRESERVE(jboolean, jni_IsAssignableFrom(JNIEnv *env, jclass sub, jclass super))
564 JNIWrapper("IsSubclassOf");
565
566 HOTSPOT_JNI_ISASSIGNABLEFROM_ENTRY(env, sub, super);
567
568 oop sub_mirror = JNIHandles::resolve_non_null(sub);
569 oop super_mirror = JNIHandles::resolve_non_null(super);
570 if (java_lang_Class::is_primitive(sub_mirror) ||
571 java_lang_Class::is_primitive(super_mirror)) {
572 jboolean ret = (sub_mirror == super_mirror);
573
574 HOTSPOT_JNI_ISASSIGNABLEFROM_RETURN(ret);
575 return ret;
576 }
577 Klass* sub_klass = java_lang_Class::as_Klass(sub_mirror);
578 Klass* super_klass = java_lang_Class::as_Klass(super_mirror);
579 assert(sub_klass != NULL && super_klass != NULL, "invalid arguments to jni_IsAssignableFrom");
580 jboolean ret = sub_klass->is_subtype_of(super_klass) ?
581 JNI_TRUE : JNI_FALSE;
582 if (sub_klass == super_klass && sub_klass->is_value()) {
583 // for inline class, V <: V?
584 ValueKlass* vk = ValueKlass::cast(InstanceKlass::cast(sub_klass));
585 if (sub_mirror == super_mirror || (sub_mirror == vk->value_mirror() && super_mirror == vk->indirect_mirror())) {
586 ret = JNI_TRUE;
587 } else {
588 ret = JNI_FALSE;
589 }
590 }
591 HOTSPOT_JNI_ISASSIGNABLEFROM_RETURN(ret);
592 return ret;
593 JNI_END
594
595
596 DT_RETURN_MARK_DECL(Throw, jint
597 , HOTSPOT_JNI_THROW_RETURN(_ret_ref));
598
599 JNI_ENTRY(jint, jni_Throw(JNIEnv *env, jthrowable obj))
600 JNIWrapper("Throw");
601
602 HOTSPOT_JNI_THROW_ENTRY(env, obj);
603
604 jint ret = JNI_OK;
605 DT_RETURN_MARK(Throw, jint, (const jint&)ret);
606
607 THROW_OOP_(JNIHandles::resolve(obj), JNI_OK);
608 ShouldNotReachHere();
609 return 0; // Mute compiler.
610 JNI_END
611
612
613 DT_RETURN_MARK_DECL(ThrowNew, jint
614 , HOTSPOT_JNI_THROWNEW_RETURN(_ret_ref));
615
616 JNI_ENTRY(jint, jni_ThrowNew(JNIEnv *env, jclass clazz, const char *message))
617 JNIWrapper("ThrowNew");
618
619 HOTSPOT_JNI_THROWNEW_ENTRY(env, clazz, (char *) message);
620
621 jint ret = JNI_OK;
622 DT_RETURN_MARK(ThrowNew, jint, (const jint&)ret);
623
624 InstanceKlass* k = InstanceKlass::cast(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz)));
625 Symbol* name = k->name();
626 Handle class_loader (THREAD, k->class_loader());
627 Handle protection_domain (THREAD, k->protection_domain());
628 THROW_MSG_LOADER_(name, (char *)message, class_loader, protection_domain, JNI_OK);
629 ShouldNotReachHere();
630 return 0; // Mute compiler.
631 JNI_END
632
633
634 // JNI functions only transform a pending async exception to a synchronous
635 // exception in ExceptionOccurred and ExceptionCheck calls, since
636 // delivering an async exception in other places won't change the native
637 // code's control flow and would be harmful when native code further calls
638 // JNI functions with a pending exception. Async exception is also checked
639 // during the call, so ExceptionOccurred/ExceptionCheck won't return
640 // false but deliver the async exception at the very end during
641 // state transition.
642
643 static void jni_check_async_exceptions(JavaThread *thread) {
644 assert(thread == Thread::current(), "must be itself");
645 thread->check_and_handle_async_exceptions();
646 }
647
648 JNI_ENTRY_NO_PRESERVE(jthrowable, jni_ExceptionOccurred(JNIEnv *env))
649 JNIWrapper("ExceptionOccurred");
650
651 HOTSPOT_JNI_EXCEPTIONOCCURRED_ENTRY(env);
652
653 jni_check_async_exceptions(thread);
654 oop exception = thread->pending_exception();
655 jthrowable ret = (jthrowable) JNIHandles::make_local(env, exception);
656
657 HOTSPOT_JNI_EXCEPTIONOCCURRED_RETURN(ret);
658 return ret;
659 JNI_END
660
661
662 JNI_ENTRY_NO_PRESERVE(void, jni_ExceptionDescribe(JNIEnv *env))
663 JNIWrapper("ExceptionDescribe");
664
665 HOTSPOT_JNI_EXCEPTIONDESCRIBE_ENTRY(env);
666
667 if (thread->has_pending_exception()) {
668 Handle ex(thread, thread->pending_exception());
669 thread->clear_pending_exception();
670 if (ex->is_a(SystemDictionary::ThreadDeath_klass())) {
671 // Don't print anything if we are being killed.
672 } else {
673 jio_fprintf(defaultStream::error_stream(), "Exception ");
674 if (thread != NULL && thread->threadObj() != NULL) {
675 ResourceMark rm(THREAD);
676 jio_fprintf(defaultStream::error_stream(),
677 "in thread \"%s\" ", thread->get_thread_name());
678 }
679 if (ex->is_a(SystemDictionary::Throwable_klass())) {
680 JavaValue result(T_VOID);
681 JavaCalls::call_virtual(&result,
682 ex,
683 SystemDictionary::Throwable_klass(),
684 vmSymbols::printStackTrace_name(),
685 vmSymbols::void_method_signature(),
686 THREAD);
687 // If an exception is thrown in the call it gets thrown away. Not much
688 // we can do with it. The native code that calls this, does not check
689 // for the exception - hence, it might still be in the thread when DestroyVM gets
690 // called, potentially causing a few asserts to trigger - since no pending exception
691 // is expected.
692 CLEAR_PENDING_EXCEPTION;
693 } else {
694 ResourceMark rm(THREAD);
695 jio_fprintf(defaultStream::error_stream(),
696 ". Uncaught exception of type %s.",
697 ex->klass()->external_name());
698 }
699 }
700 }
701
702 HOTSPOT_JNI_EXCEPTIONDESCRIBE_RETURN();
703 JNI_END
704
705
706 JNI_ENTRY_NO_PRESERVE(void, jni_ExceptionClear(JNIEnv *env))
707 JNIWrapper("ExceptionClear");
708
709 HOTSPOT_JNI_EXCEPTIONCLEAR_ENTRY(env);
710
711 // The jni code might be using this API to clear java thrown exception.
712 // So just mark jvmti thread exception state as exception caught.
713 JvmtiThreadState *state = JavaThread::current()->jvmti_thread_state();
714 if (state != NULL && state->is_exception_detected()) {
715 state->set_exception_caught();
716 }
717 thread->clear_pending_exception();
718
719 HOTSPOT_JNI_EXCEPTIONCLEAR_RETURN();
720 JNI_END
721
722
723 JNI_ENTRY(void, jni_FatalError(JNIEnv *env, const char *msg))
724 JNIWrapper("FatalError");
725
726 HOTSPOT_JNI_FATALERROR_ENTRY(env, (char *) msg);
727
728 tty->print_cr("FATAL ERROR in native method: %s", msg);
729 thread->print_stack();
730 os::abort(); // Dump core and abort
731 JNI_END
732
733
734 JNI_ENTRY(jint, jni_PushLocalFrame(JNIEnv *env, jint capacity))
735 JNIWrapper("PushLocalFrame");
736
737 HOTSPOT_JNI_PUSHLOCALFRAME_ENTRY(env, capacity);
738
739 //%note jni_11
740 if (capacity < 0 ||
741 ((MaxJNILocalCapacity > 0) && (capacity > MaxJNILocalCapacity))) {
742 HOTSPOT_JNI_PUSHLOCALFRAME_RETURN((uint32_t)JNI_ERR);
743 return JNI_ERR;
744 }
745 JNIHandleBlock* old_handles = thread->active_handles();
746 JNIHandleBlock* new_handles = JNIHandleBlock::allocate_block(thread);
747 assert(new_handles != NULL, "should not be NULL");
748 new_handles->set_pop_frame_link(old_handles);
749 thread->set_active_handles(new_handles);
750 jint ret = JNI_OK;
751 HOTSPOT_JNI_PUSHLOCALFRAME_RETURN(ret);
752 return ret;
753 JNI_END
754
755
756 JNI_ENTRY(jobject, jni_PopLocalFrame(JNIEnv *env, jobject result))
757 JNIWrapper("PopLocalFrame");
758
759 HOTSPOT_JNI_POPLOCALFRAME_ENTRY(env, result);
760
761 //%note jni_11
762 Handle result_handle(thread, JNIHandles::resolve(result));
763 JNIHandleBlock* old_handles = thread->active_handles();
764 JNIHandleBlock* new_handles = old_handles->pop_frame_link();
765 if (new_handles != NULL) {
766 // As a sanity check we only release the handle blocks if the pop_frame_link is not NULL.
767 // This way code will still work if PopLocalFrame is called without a corresponding
768 // PushLocalFrame call. Note that we set the pop_frame_link to NULL explicitly, otherwise
769 // the release_block call will release the blocks.
770 thread->set_active_handles(new_handles);
771 old_handles->set_pop_frame_link(NULL); // clear link we won't release new_handles below
772 JNIHandleBlock::release_block(old_handles, thread); // may block
773 result = JNIHandles::make_local(thread, result_handle());
774 }
775 HOTSPOT_JNI_POPLOCALFRAME_RETURN(result);
776 return result;
777 JNI_END
778
779
780 JNI_ENTRY(jobject, jni_NewGlobalRef(JNIEnv *env, jobject ref))
781 JNIWrapper("NewGlobalRef");
782
783 HOTSPOT_JNI_NEWGLOBALREF_ENTRY(env, ref);
784
785 Handle ref_handle(thread, JNIHandles::resolve(ref));
786 jobject ret = JNIHandles::make_global(ref_handle);
787
788 HOTSPOT_JNI_NEWGLOBALREF_RETURN(ret);
789 return ret;
790 JNI_END
791
792 // Must be JNI_ENTRY (with HandleMark)
793 JNI_ENTRY_NO_PRESERVE(void, jni_DeleteGlobalRef(JNIEnv *env, jobject ref))
794 JNIWrapper("DeleteGlobalRef");
795
796 HOTSPOT_JNI_DELETEGLOBALREF_ENTRY(env, ref);
797
798 JNIHandles::destroy_global(ref);
799
800 HOTSPOT_JNI_DELETEGLOBALREF_RETURN();
801 JNI_END
802
803 JNI_ENTRY_NO_PRESERVE(void, jni_DeleteLocalRef(JNIEnv *env, jobject obj))
804 JNIWrapper("DeleteLocalRef");
805
806 HOTSPOT_JNI_DELETELOCALREF_ENTRY(env, obj);
807
808 JNIHandles::destroy_local(obj);
809
810 HOTSPOT_JNI_DELETELOCALREF_RETURN();
811 JNI_END
812
813 JNI_ENTRY_NO_PRESERVE(jboolean, jni_IsSameObject(JNIEnv *env, jobject r1, jobject r2))
814 JNIWrapper("IsSameObject");
815
816 HOTSPOT_JNI_ISSAMEOBJECT_ENTRY(env, r1, r2);
817
818 jboolean ret = JNIHandles::is_same_object(r1, r2) ? JNI_TRUE : JNI_FALSE;
819
820 HOTSPOT_JNI_ISSAMEOBJECT_RETURN(ret);
821 return ret;
822 JNI_END
823
824
825 JNI_ENTRY(jobject, jni_NewLocalRef(JNIEnv *env, jobject ref))
826 JNIWrapper("NewLocalRef");
827
828 HOTSPOT_JNI_NEWLOCALREF_ENTRY(env, ref);
829
830 jobject ret = JNIHandles::make_local(env, JNIHandles::resolve(ref));
831
832 HOTSPOT_JNI_NEWLOCALREF_RETURN(ret);
833 return ret;
834 JNI_END
835
836 JNI_LEAF(jint, jni_EnsureLocalCapacity(JNIEnv *env, jint capacity))
837 JNIWrapper("EnsureLocalCapacity");
838
839 HOTSPOT_JNI_ENSURELOCALCAPACITY_ENTRY(env, capacity);
840
841 jint ret;
842 if (capacity >= 0 &&
843 ((MaxJNILocalCapacity <= 0) || (capacity <= MaxJNILocalCapacity))) {
844 ret = JNI_OK;
845 } else {
846 ret = JNI_ERR;
847 }
848
849 HOTSPOT_JNI_ENSURELOCALCAPACITY_RETURN(ret);
850 return ret;
851 JNI_END
852
853 // Return the Handle Type
854 JNI_LEAF(jobjectRefType, jni_GetObjectRefType(JNIEnv *env, jobject obj))
855 JNIWrapper("GetObjectRefType");
856
857 HOTSPOT_JNI_GETOBJECTREFTYPE_ENTRY(env, obj);
858
859 jobjectRefType ret = JNIInvalidRefType;
860 if (obj != NULL) {
861 ret = JNIHandles::handle_type(thread, obj);
862 }
863
864 HOTSPOT_JNI_GETOBJECTREFTYPE_RETURN((void *) ret);
865 return ret;
866 JNI_END
867
868
869 class JNI_ArgumentPusher : public SignatureIterator {
870 protected:
871 JavaCallArguments* _arguments;
872
873 virtual void get_bool () = 0;
874 virtual void get_char () = 0;
875 virtual void get_short () = 0;
876 virtual void get_byte () = 0;
877 virtual void get_int () = 0;
878 virtual void get_long () = 0;
879 virtual void get_float () = 0;
880 virtual void get_double () = 0;
881 virtual void get_object () = 0;
882 virtual void get_valuetype() = 0;
883
884 JNI_ArgumentPusher(Symbol* signature) : SignatureIterator(signature) {
885 this->_return_type = T_ILLEGAL;
886 _arguments = NULL;
887 }
888
889 public:
890 virtual void iterate( uint64_t fingerprint ) = 0;
891
892 void set_java_argument_object(JavaCallArguments *arguments) { _arguments = arguments; }
893
894 inline void do_bool() { if (!is_return_type()) get_bool(); }
895 inline void do_char() { if (!is_return_type()) get_char(); }
896 inline void do_short() { if (!is_return_type()) get_short(); }
897 inline void do_byte() { if (!is_return_type()) get_byte(); }
898 inline void do_int() { if (!is_return_type()) get_int(); }
899 inline void do_long() { if (!is_return_type()) get_long(); }
900 inline void do_float() { if (!is_return_type()) get_float(); }
901 inline void do_double() { if (!is_return_type()) get_double(); }
902 inline void do_object(int begin, int end) { if (!is_return_type()) get_object(); }
903 inline void do_valuetype(int begin, int end) { if (!is_return_type()) get_valuetype(); }
904 inline void do_array(int begin, int end) { if (!is_return_type()) get_object(); } // do_array uses get_object -- there is no get_array
905 inline void do_void() { }
906
907 JavaCallArguments* arguments() { return _arguments; }
908 void push_receiver(Handle h) { _arguments->push_oop(h); }
909 };
910
911
912 class JNI_ArgumentPusherVaArg : public JNI_ArgumentPusher {
913 protected:
914 va_list _ap;
915
916 inline void get_bool() {
917 // Normalize boolean arguments from native code by converting 1-255 to JNI_TRUE and
918 // 0 to JNI_FALSE. Boolean return values from native are normalized the same in
919 // TemplateInterpreterGenerator::generate_result_handler_for and
920 // SharedRuntime::generate_native_wrapper.
921 jboolean b = va_arg(_ap, jint);
922 _arguments->push_int((jint)(b == 0 ? JNI_FALSE : JNI_TRUE));
923 }
924 inline void get_char() { _arguments->push_int(va_arg(_ap, jint)); } // char is coerced to int when using va_arg
925 inline void get_short() { _arguments->push_int(va_arg(_ap, jint)); } // short is coerced to int when using va_arg
926 inline void get_byte() { _arguments->push_int(va_arg(_ap, jint)); } // byte is coerced to int when using va_arg
927 inline void get_int() { _arguments->push_int(va_arg(_ap, jint)); }
928
929 // each of these paths is exercized by the various jck Call[Static,Nonvirtual,][Void,Int,..]Method[A,V,] tests
930
931 inline void get_long() { _arguments->push_long(va_arg(_ap, jlong)); }
932 inline void get_float() { _arguments->push_float((jfloat)va_arg(_ap, jdouble)); } // float is coerced to double w/ va_arg
933 inline void get_double() { _arguments->push_double(va_arg(_ap, jdouble)); }
934 inline void get_object() { _arguments->push_jobject(va_arg(_ap, jobject)); }
935 inline void get_valuetype() { _arguments->push_jobject(va_arg(_ap, jobject)); }
936
937 inline void set_ap(va_list rap) {
938 va_copy(_ap, rap);
939 }
940
941 public:
942 JNI_ArgumentPusherVaArg(Symbol* signature, va_list rap)
943 : JNI_ArgumentPusher(signature) {
944 set_ap(rap);
945 }
946 JNI_ArgumentPusherVaArg(jmethodID method_id, va_list rap)
947 : JNI_ArgumentPusher(Method::resolve_jmethod_id(method_id)->signature()) {
948 set_ap(rap);
949 }
950
951 // Optimized path if we have the bitvector form of signature
952 void iterate( uint64_t fingerprint ) {
953 if (fingerprint == (uint64_t)CONST64(-1)) {
954 SignatureIterator::iterate(); // Must be too many arguments
955 } else {
956 _return_type = (BasicType)((fingerprint >> static_feature_size) &
957 result_feature_mask);
958
959 assert(fingerprint, "Fingerprint should not be 0");
960 fingerprint = fingerprint >> (static_feature_size + result_feature_size);
961 while ( 1 ) {
962 switch ( fingerprint & parameter_feature_mask ) {
963 case bool_parm:
964 get_bool();
965 break;
966 case char_parm:
967 get_char();
968 break;
969 case short_parm:
970 get_short();
971 break;
972 case byte_parm:
973 get_byte();
974 break;
975 case int_parm:
976 get_int();
977 break;
978 case obj_parm:
979 get_object();
980 break;
981 case long_parm:
982 get_long();
983 break;
984 case float_parm:
985 get_float();
986 break;
987 case double_parm:
988 get_double();
989 break;
990 case done_parm:
991 return;
992 break;
993 default:
994 ShouldNotReachHere();
995 break;
996 }
997 fingerprint >>= parameter_feature_size;
998 }
999 }
1000 }
1001 };
1002
1003
1004 class JNI_ArgumentPusherArray : public JNI_ArgumentPusher {
1005 protected:
1006 const jvalue *_ap;
1007
1008 inline void get_bool() {
1009 // Normalize boolean arguments from native code by converting 1-255 to JNI_TRUE and
1010 // 0 to JNI_FALSE. Boolean return values from native are normalized the same in
1011 // TemplateInterpreterGenerator::generate_result_handler_for and
1012 // SharedRuntime::generate_native_wrapper.
1013 jboolean b = (_ap++)->z;
1014 _arguments->push_int((jint)(b == 0 ? JNI_FALSE : JNI_TRUE));
1015 }
1016 inline void get_char() { _arguments->push_int((jint)(_ap++)->c); }
1017 inline void get_short() { _arguments->push_int((jint)(_ap++)->s); }
1018 inline void get_byte() { _arguments->push_int((jint)(_ap++)->b); }
1019 inline void get_int() { _arguments->push_int((jint)(_ap++)->i); }
1020
1021 inline void get_long() { _arguments->push_long((_ap++)->j); }
1022 inline void get_float() { _arguments->push_float((_ap++)->f); }
1023 inline void get_double() { _arguments->push_double((_ap++)->d);}
1024 inline void get_object() { _arguments->push_jobject((_ap++)->l); }
1025 // value types are implemented with oops too
1026 inline void get_valuetype() { _arguments->push_jobject((_ap++)->l); }
1027
1028 inline void set_ap(const jvalue *rap) { _ap = rap; }
1029
1030 public:
1031 JNI_ArgumentPusherArray(Symbol* signature, const jvalue *rap)
1032 : JNI_ArgumentPusher(signature) {
1033 set_ap(rap);
1034 }
1035 JNI_ArgumentPusherArray(jmethodID method_id, const jvalue *rap)
1036 : JNI_ArgumentPusher(Method::resolve_jmethod_id(method_id)->signature()) {
1037 set_ap(rap);
1038 }
1039
1040 // Optimized path if we have the bitvector form of signature
1041 void iterate( uint64_t fingerprint ) {
1042 if (fingerprint == (uint64_t)CONST64(-1)) {
1043 SignatureIterator::iterate(); // Must be too many arguments
1044 } else {
1045 _return_type = (BasicType)((fingerprint >> static_feature_size) &
1046 result_feature_mask);
1047 assert(fingerprint, "Fingerprint should not be 0");
1048 fingerprint = fingerprint >> (static_feature_size + result_feature_size);
1049 while ( 1 ) {
1050 switch ( fingerprint & parameter_feature_mask ) {
1051 case bool_parm:
1052 get_bool();
1053 break;
1054 case char_parm:
1055 get_char();
1056 break;
1057 case short_parm:
1058 get_short();
1059 break;
1060 case byte_parm:
1061 get_byte();
1062 break;
1063 case int_parm:
1064 get_int();
1065 break;
1066 case obj_parm:
1067 get_object();
1068 break;
1069 case long_parm:
1070 get_long();
1071 break;
1072 case float_parm:
1073 get_float();
1074 break;
1075 case double_parm:
1076 get_double();
1077 break;
1078 case done_parm:
1079 return;
1080 break;
1081 default:
1082 ShouldNotReachHere();
1083 break;
1084 }
1085 fingerprint >>= parameter_feature_size;
1086 }
1087 }
1088 }
1089 };
1090
1091
1092 enum JNICallType {
1093 JNI_STATIC,
1094 JNI_VIRTUAL,
1095 JNI_NONVIRTUAL
1096 };
1097
1098
1099
1100 static void jni_invoke_static(JNIEnv *env, JavaValue* result, jobject receiver, JNICallType call_type, jmethodID method_id, JNI_ArgumentPusher *args, TRAPS) {
1101 methodHandle method(THREAD, Method::resolve_jmethod_id(method_id));
1102
1103 // Create object to hold arguments for the JavaCall, and associate it with
1104 // the jni parser
1105 ResourceMark rm(THREAD);
1106 int number_of_parameters = method->size_of_parameters();
1107 JavaCallArguments java_args(number_of_parameters);
1108 args->set_java_argument_object(&java_args);
1109
1110 assert(method->is_static(), "method should be static");
1111
1112 // Fill out JavaCallArguments object
1113 args->iterate( Fingerprinter(method).fingerprint() );
1114 // Initialize result type
1115 result->set_type(args->get_ret_type());
1116
1117 // Invoke the method. Result is returned as oop.
1118 JavaCalls::call(result, method, &java_args, CHECK);
1119
1120 // Convert result
1121 if (result->get_type() == T_OBJECT || result->get_type() == T_ARRAY || result->get_type() == T_VALUETYPE) {
1122 result->set_jobject(JNIHandles::make_local(env, (oop) result->get_jobject()));
1123 }
1124 }
1125
1126
1127 static void jni_invoke_nonstatic(JNIEnv *env, JavaValue* result, jobject receiver, JNICallType call_type, jmethodID method_id, JNI_ArgumentPusher *args, TRAPS) {
1128 oop recv = JNIHandles::resolve(receiver);
1129 if (recv == NULL) {
1130 THROW(vmSymbols::java_lang_NullPointerException());
1131 }
1132 Handle h_recv(THREAD, recv);
1133
1134 int number_of_parameters;
1135 Method* selected_method;
1136 {
1137 Method* m = Method::resolve_jmethod_id(method_id);
1138 number_of_parameters = m->size_of_parameters();
1139 Klass* holder = m->method_holder();
1140 if (call_type != JNI_VIRTUAL) {
1141 selected_method = m;
1142 } else if (!m->has_itable_index()) {
1143 // non-interface call -- for that little speed boost, don't handlize
1144 debug_only(NoSafepointVerifier nosafepoint;)
1145 // jni_GetMethodID makes sure class is linked and initialized
1146 // so m should have a valid vtable index.
1147 assert(m->valid_vtable_index(), "no valid vtable index");
1148 int vtbl_index = m->vtable_index();
1149 if (vtbl_index != Method::nonvirtual_vtable_index) {
1150 selected_method = h_recv->klass()->method_at_vtable(vtbl_index);
1151 } else {
1152 // final method
1153 selected_method = m;
1154 }
1155 } else {
1156 // interface call
1157 int itbl_index = m->itable_index();
1158 Klass* k = h_recv->klass();
1159 selected_method = InstanceKlass::cast(k)->method_at_itable(holder, itbl_index, CHECK);
1160 }
1161 }
1162
1163 methodHandle method(THREAD, selected_method);
1164
1165 // Create object to hold arguments for the JavaCall, and associate it with
1166 // the jni parser
1167 ResourceMark rm(THREAD);
1168 JavaCallArguments java_args(number_of_parameters);
1169 args->set_java_argument_object(&java_args);
1170
1171 // handle arguments
1172 assert(!method->is_static(), "method %s should not be static", method->name_and_sig_as_C_string());
1173 args->push_receiver(h_recv); // Push jobject handle
1174
1175 // Fill out JavaCallArguments object
1176 args->iterate( Fingerprinter(method).fingerprint() );
1177 // Initialize result type
1178 result->set_type(args->get_ret_type());
1179
1180 // Invoke the method. Result is returned as oop.
1181 JavaCalls::call(result, method, &java_args, CHECK);
1182
1183 // Convert result
1184 if (result->get_type() == T_OBJECT || result->get_type() == T_ARRAY || result->get_type() == T_VALUETYPE) {
1185 result->set_jobject(JNIHandles::make_local(env, (oop) result->get_jobject()));
1186 }
1187 }
1188
1189
1190 static instanceOop alloc_object(jclass clazz, TRAPS) {
1191 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz));
1192 if (k == NULL) {
1193 ResourceMark rm(THREAD);
1194 THROW_(vmSymbols::java_lang_InstantiationException(), NULL);
1195 }
1196 k->check_valid_for_instantiation(false, CHECK_NULL);
1197 k->initialize(CHECK_NULL);
1198 instanceOop ih = InstanceKlass::cast(k)->allocate_instance(THREAD);
1199 return ih;
1200 }
1201
1202 DT_RETURN_MARK_DECL(AllocObject, jobject
1203 , HOTSPOT_JNI_ALLOCOBJECT_RETURN(_ret_ref));
1204
1205 JNI_ENTRY(jobject, jni_AllocObject(JNIEnv *env, jclass clazz))
1206 JNIWrapper("AllocObject");
1207
1208 HOTSPOT_JNI_ALLOCOBJECT_ENTRY(env, clazz);
1209
1210 jobject ret = NULL;
1211 DT_RETURN_MARK(AllocObject, jobject, (const jobject&)ret);
1212
1213 instanceOop i = alloc_object(clazz, CHECK_NULL);
1214 ret = JNIHandles::make_local(env, i);
1215 return ret;
1216 JNI_END
1217
1218 DT_RETURN_MARK_DECL(NewObjectA, jobject
1219 , HOTSPOT_JNI_NEWOBJECTA_RETURN(_ret_ref));
1220
1221 JNI_ENTRY(jobject, jni_NewObjectA(JNIEnv *env, jclass clazz, jmethodID methodID, const jvalue *args))
1222 JNIWrapper("NewObjectA");
1223
1224 HOTSPOT_JNI_NEWOBJECTA_ENTRY(env, clazz, (uintptr_t) methodID);
1225
1226 jobject obj = NULL;
1227 DT_RETURN_MARK(NewObjectA, jobject, (const jobject)obj);
1228
1229 instanceOop i = alloc_object(clazz, CHECK_NULL);
1230 obj = JNIHandles::make_local(env, i);
1231 JavaValue jvalue(T_VOID);
1232 JNI_ArgumentPusherArray ap(methodID, args);
1233 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_NULL);
1234 return obj;
1235 JNI_END
1236
1237
1238 DT_RETURN_MARK_DECL(NewObjectV, jobject
1239 , HOTSPOT_JNI_NEWOBJECTV_RETURN(_ret_ref));
1240
1241 JNI_ENTRY(jobject, jni_NewObjectV(JNIEnv *env, jclass clazz, jmethodID methodID, va_list args))
1242 JNIWrapper("NewObjectV");
1243
1244 HOTSPOT_JNI_NEWOBJECTV_ENTRY(env, clazz, (uintptr_t) methodID);
1245
1246 jobject obj = NULL;
1247 DT_RETURN_MARK(NewObjectV, jobject, (const jobject&)obj);
1248
1249 instanceOop i = alloc_object(clazz, CHECK_NULL);
1250 obj = JNIHandles::make_local(env, i);
1251 JavaValue jvalue(T_VOID);
1252 JNI_ArgumentPusherVaArg ap(methodID, args);
1253 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_NULL);
1254 return obj;
1255 JNI_END
1256
1257
1258 DT_RETURN_MARK_DECL(NewObject, jobject
1259 , HOTSPOT_JNI_NEWOBJECT_RETURN(_ret_ref));
1260
1261 JNI_ENTRY(jobject, jni_NewObject(JNIEnv *env, jclass clazz, jmethodID methodID, ...))
1262 JNIWrapper("NewObject");
1263
1264 HOTSPOT_JNI_NEWOBJECT_ENTRY(env, clazz, (uintptr_t) methodID);
1265
1266 jobject obj = NULL;
1267 DT_RETURN_MARK(NewObject, jobject, (const jobject&)obj);
1268
1269 instanceOop i = alloc_object(clazz, CHECK_NULL);
1270 obj = JNIHandles::make_local(env, i);
1271 va_list args;
1272 va_start(args, methodID);
1273 JavaValue jvalue(T_VOID);
1274 JNI_ArgumentPusherVaArg ap(methodID, args);
1275 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_NULL);
1276 va_end(args);
1277 return obj;
1278 JNI_END
1279
1280
1281 JNI_ENTRY(jclass, jni_GetObjectClass(JNIEnv *env, jobject obj))
1282 JNIWrapper("GetObjectClass");
1283
1284 HOTSPOT_JNI_GETOBJECTCLASS_ENTRY(env, obj);
1285
1286 Klass* k = JNIHandles::resolve_non_null(obj)->klass();
1287 jclass ret =
1288 (jclass) JNIHandles::make_local(env, k->java_mirror());
1289
1290 HOTSPOT_JNI_GETOBJECTCLASS_RETURN(ret);
1291 return ret;
1292 JNI_END
1293
1294 JNI_ENTRY_NO_PRESERVE(jboolean, jni_IsInstanceOf(JNIEnv *env, jobject obj, jclass clazz))
1295 JNIWrapper("IsInstanceOf");
1296
1297 HOTSPOT_JNI_ISINSTANCEOF_ENTRY(env, obj, clazz);
1298
1299 jboolean ret = JNI_TRUE;
1300 if (obj != NULL) {
1301 ret = JNI_FALSE;
1302 Klass* k = java_lang_Class::as_Klass(
1303 JNIHandles::resolve_non_null(clazz));
1304 if (k != NULL) {
1305 ret = JNIHandles::resolve_non_null(obj)->is_a(k) ? JNI_TRUE : JNI_FALSE;
1306 }
1307 }
1308
1309 HOTSPOT_JNI_ISINSTANCEOF_RETURN(ret);
1310 return ret;
1311 JNI_END
1312
1313
1314 static jmethodID get_method_id(JNIEnv *env, jclass clazz, const char *name_str,
1315 const char *sig, bool is_static, TRAPS) {
1316 // %%%% This code should probably just call into a method in the LinkResolver
1317 //
1318 // The class should have been loaded (we have an instance of the class
1319 // passed in) so the method and signature should already be in the symbol
1320 // table. If they're not there, the method doesn't exist.
1321 const char *name_to_probe = (name_str == NULL)
1322 ? vmSymbols::object_initializer_name()->as_C_string()
1323 : name_str;
1324 TempNewSymbol name = SymbolTable::probe(name_to_probe, (int)strlen(name_to_probe));
1325 TempNewSymbol signature = SymbolTable::probe(sig, (int)strlen(sig));
1326
1327 if (name == NULL || signature == NULL) {
1328 THROW_MSG_0(vmSymbols::java_lang_NoSuchMethodError(), name_str);
1329 }
1330
1331 Klass* klass = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz));
1332
1333 // Throw a NoSuchMethodError exception if we have an instance of a
1334 // primitive java.lang.Class
1335 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(clazz))) {
1336 ResourceMark rm;
1337 THROW_MSG_0(vmSymbols::java_lang_NoSuchMethodError(), err_msg("%s%s.%s%s", is_static ? "static " : "", klass->signature_name(), name_str, sig));
1338 }
1339
1340 // Make sure class is linked and initialized before handing id's out to
1341 // Method*s.
1342 klass->initialize(CHECK_NULL);
1343
1344 Method* m;
1345 if (name == vmSymbols::object_initializer_name() ||
1346 name == vmSymbols::class_initializer_name()) {
1347 // Never search superclasses for constructors
1348 if (klass->is_instance_klass()) {
1349 m = InstanceKlass::cast(klass)->find_method(name, signature);
1350 } else {
1351 m = NULL;
1352 }
1353 } else {
1354 m = klass->lookup_method(name, signature);
1355 if (m == NULL && klass->is_instance_klass()) {
1356 m = InstanceKlass::cast(klass)->lookup_method_in_ordered_interfaces(name, signature);
1357 }
1358 }
1359 if (m == NULL || (m->is_static() != is_static)) {
1360 ResourceMark rm;
1361 THROW_MSG_0(vmSymbols::java_lang_NoSuchMethodError(), err_msg("%s%s.%s%s", is_static ? "static " : "", klass->signature_name(), name_str, sig));
1362 }
1363 return m->jmethod_id();
1364 }
1365
1366
1367 JNI_ENTRY(jmethodID, jni_GetMethodID(JNIEnv *env, jclass clazz,
1368 const char *name, const char *sig))
1369 JNIWrapper("GetMethodID");
1370 HOTSPOT_JNI_GETMETHODID_ENTRY(env, clazz, (char *) name, (char *) sig);
1371 jmethodID ret = get_method_id(env, clazz, name, sig, false, thread);
1372 HOTSPOT_JNI_GETMETHODID_RETURN((uintptr_t) ret);
1373 return ret;
1374 JNI_END
1375
1376
1377 JNI_ENTRY(jmethodID, jni_GetStaticMethodID(JNIEnv *env, jclass clazz,
1378 const char *name, const char *sig))
1379 JNIWrapper("GetStaticMethodID");
1380 HOTSPOT_JNI_GETSTATICMETHODID_ENTRY(env, (char *) clazz, (char *) name, (char *)sig);
1381 jmethodID ret = get_method_id(env, clazz, name, sig, true, thread);
1382 HOTSPOT_JNI_GETSTATICMETHODID_RETURN((uintptr_t) ret);
1383 return ret;
1384 JNI_END
1385
1386
1387
1388 //
1389 // Calling Methods
1390 //
1391
1392
1393 #define DEFINE_CALLMETHOD(ResultType, Result, Tag \
1394 , EntryProbe, ReturnProbe) \
1395 \
1396 DT_RETURN_MARK_DECL_FOR(Result, Call##Result##Method, ResultType \
1397 , ReturnProbe); \
1398 \
1399 JNI_ENTRY(ResultType, \
1400 jni_Call##Result##Method(JNIEnv *env, jobject obj, jmethodID methodID, ...)) \
1401 JNIWrapper("Call" XSTR(Result) "Method"); \
1402 \
1403 EntryProbe; \
1404 ResultType ret = 0;\
1405 DT_RETURN_MARK_FOR(Result, Call##Result##Method, ResultType, \
1406 (const ResultType&)ret);\
1407 \
1408 va_list args; \
1409 va_start(args, methodID); \
1410 JavaValue jvalue(Tag); \
1411 JNI_ArgumentPusherVaArg ap(methodID, args); \
1412 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK_0); \
1413 va_end(args); \
1414 ret = jvalue.get_##ResultType(); \
1415 return ret;\
1416 JNI_END
1417
1418 // the runtime type of subword integral basic types is integer
1419 DEFINE_CALLMETHOD(jboolean, Boolean, T_BOOLEAN
1420 , HOTSPOT_JNI_CALLBOOLEANMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1421 HOTSPOT_JNI_CALLBOOLEANMETHOD_RETURN(_ret_ref))
1422 DEFINE_CALLMETHOD(jbyte, Byte, T_BYTE
1423 , HOTSPOT_JNI_CALLBYTEMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1424 HOTSPOT_JNI_CALLBYTEMETHOD_RETURN(_ret_ref))
1425 DEFINE_CALLMETHOD(jchar, Char, T_CHAR
1426 , HOTSPOT_JNI_CALLCHARMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1427 HOTSPOT_JNI_CALLCHARMETHOD_RETURN(_ret_ref))
1428 DEFINE_CALLMETHOD(jshort, Short, T_SHORT
1429 , HOTSPOT_JNI_CALLSHORTMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1430 HOTSPOT_JNI_CALLSHORTMETHOD_RETURN(_ret_ref))
1431
1432 DEFINE_CALLMETHOD(jobject, Object, T_OBJECT
1433 , HOTSPOT_JNI_CALLOBJECTMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1434 HOTSPOT_JNI_CALLOBJECTMETHOD_RETURN(_ret_ref))
1435 DEFINE_CALLMETHOD(jint, Int, T_INT,
1436 HOTSPOT_JNI_CALLINTMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1437 HOTSPOT_JNI_CALLINTMETHOD_RETURN(_ret_ref))
1438 DEFINE_CALLMETHOD(jlong, Long, T_LONG
1439 , HOTSPOT_JNI_CALLLONGMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1440 HOTSPOT_JNI_CALLLONGMETHOD_RETURN(_ret_ref))
1441 // Float and double probes don't return value because dtrace doesn't currently support it
1442 DEFINE_CALLMETHOD(jfloat, Float, T_FLOAT
1443 , HOTSPOT_JNI_CALLFLOATMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1444 HOTSPOT_JNI_CALLFLOATMETHOD_RETURN())
1445 DEFINE_CALLMETHOD(jdouble, Double, T_DOUBLE
1446 , HOTSPOT_JNI_CALLDOUBLEMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1447 HOTSPOT_JNI_CALLDOUBLEMETHOD_RETURN())
1448
1449 #define DEFINE_CALLMETHODV(ResultType, Result, Tag \
1450 , EntryProbe, ReturnProbe) \
1451 \
1452 DT_RETURN_MARK_DECL_FOR(Result, Call##Result##MethodV, ResultType \
1453 , ReturnProbe); \
1454 \
1455 JNI_ENTRY(ResultType, \
1456 jni_Call##Result##MethodV(JNIEnv *env, jobject obj, jmethodID methodID, va_list args)) \
1457 JNIWrapper("Call" XSTR(Result) "MethodV"); \
1458 \
1459 EntryProbe;\
1460 ResultType ret = 0;\
1461 DT_RETURN_MARK_FOR(Result, Call##Result##MethodV, ResultType, \
1462 (const ResultType&)ret);\
1463 \
1464 JavaValue jvalue(Tag); \
1465 JNI_ArgumentPusherVaArg ap(methodID, args); \
1466 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK_0); \
1467 ret = jvalue.get_##ResultType(); \
1468 return ret;\
1469 JNI_END
1470
1471 // the runtime type of subword integral basic types is integer
1472 DEFINE_CALLMETHODV(jboolean, Boolean, T_BOOLEAN
1473 , HOTSPOT_JNI_CALLBOOLEANMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1474 HOTSPOT_JNI_CALLBOOLEANMETHODV_RETURN(_ret_ref))
1475 DEFINE_CALLMETHODV(jbyte, Byte, T_BYTE
1476 , HOTSPOT_JNI_CALLBYTEMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1477 HOTSPOT_JNI_CALLBYTEMETHODV_RETURN(_ret_ref))
1478 DEFINE_CALLMETHODV(jchar, Char, T_CHAR
1479 , HOTSPOT_JNI_CALLCHARMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1480 HOTSPOT_JNI_CALLCHARMETHODV_RETURN(_ret_ref))
1481 DEFINE_CALLMETHODV(jshort, Short, T_SHORT
1482 , HOTSPOT_JNI_CALLSHORTMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1483 HOTSPOT_JNI_CALLSHORTMETHODV_RETURN(_ret_ref))
1484
1485 DEFINE_CALLMETHODV(jobject, Object, T_OBJECT
1486 , HOTSPOT_JNI_CALLOBJECTMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1487 HOTSPOT_JNI_CALLOBJECTMETHODV_RETURN(_ret_ref))
1488 DEFINE_CALLMETHODV(jint, Int, T_INT,
1489 HOTSPOT_JNI_CALLINTMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1490 HOTSPOT_JNI_CALLINTMETHODV_RETURN(_ret_ref))
1491 DEFINE_CALLMETHODV(jlong, Long, T_LONG
1492 , HOTSPOT_JNI_CALLLONGMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1493 HOTSPOT_JNI_CALLLONGMETHODV_RETURN(_ret_ref))
1494 // Float and double probes don't return value because dtrace doesn't currently support it
1495 DEFINE_CALLMETHODV(jfloat, Float, T_FLOAT
1496 , HOTSPOT_JNI_CALLFLOATMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1497 HOTSPOT_JNI_CALLFLOATMETHODV_RETURN())
1498 DEFINE_CALLMETHODV(jdouble, Double, T_DOUBLE
1499 , HOTSPOT_JNI_CALLDOUBLEMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1500 HOTSPOT_JNI_CALLDOUBLEMETHODV_RETURN())
1501
1502 #define DEFINE_CALLMETHODA(ResultType, Result, Tag \
1503 , EntryProbe, ReturnProbe) \
1504 \
1505 DT_RETURN_MARK_DECL_FOR(Result, Call##Result##MethodA, ResultType \
1506 , ReturnProbe); \
1507 \
1508 JNI_ENTRY(ResultType, \
1509 jni_Call##Result##MethodA(JNIEnv *env, jobject obj, jmethodID methodID, const jvalue *args)) \
1510 JNIWrapper("Call" XSTR(Result) "MethodA"); \
1511 EntryProbe; \
1512 ResultType ret = 0;\
1513 DT_RETURN_MARK_FOR(Result, Call##Result##MethodA, ResultType, \
1514 (const ResultType&)ret);\
1515 \
1516 JavaValue jvalue(Tag); \
1517 JNI_ArgumentPusherArray ap(methodID, args); \
1518 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK_0); \
1519 ret = jvalue.get_##ResultType(); \
1520 return ret;\
1521 JNI_END
1522
1523 // the runtime type of subword integral basic types is integer
1524 DEFINE_CALLMETHODA(jboolean, Boolean, T_BOOLEAN
1525 , HOTSPOT_JNI_CALLBOOLEANMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1526 HOTSPOT_JNI_CALLBOOLEANMETHODA_RETURN(_ret_ref))
1527 DEFINE_CALLMETHODA(jbyte, Byte, T_BYTE
1528 , HOTSPOT_JNI_CALLBYTEMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1529 HOTSPOT_JNI_CALLBYTEMETHODA_RETURN(_ret_ref))
1530 DEFINE_CALLMETHODA(jchar, Char, T_CHAR
1531 , HOTSPOT_JNI_CALLCHARMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1532 HOTSPOT_JNI_CALLCHARMETHODA_RETURN(_ret_ref))
1533 DEFINE_CALLMETHODA(jshort, Short, T_SHORT
1534 , HOTSPOT_JNI_CALLSHORTMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1535 HOTSPOT_JNI_CALLSHORTMETHODA_RETURN(_ret_ref))
1536
1537 DEFINE_CALLMETHODA(jobject, Object, T_OBJECT
1538 , HOTSPOT_JNI_CALLOBJECTMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1539 HOTSPOT_JNI_CALLOBJECTMETHODA_RETURN(_ret_ref))
1540 DEFINE_CALLMETHODA(jint, Int, T_INT,
1541 HOTSPOT_JNI_CALLINTMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1542 HOTSPOT_JNI_CALLINTMETHODA_RETURN(_ret_ref))
1543 DEFINE_CALLMETHODA(jlong, Long, T_LONG
1544 , HOTSPOT_JNI_CALLLONGMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1545 HOTSPOT_JNI_CALLLONGMETHODA_RETURN(_ret_ref))
1546 // Float and double probes don't return value because dtrace doesn't currently support it
1547 DEFINE_CALLMETHODA(jfloat, Float, T_FLOAT
1548 , HOTSPOT_JNI_CALLFLOATMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1549 HOTSPOT_JNI_CALLFLOATMETHODA_RETURN())
1550 DEFINE_CALLMETHODA(jdouble, Double, T_DOUBLE
1551 , HOTSPOT_JNI_CALLDOUBLEMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1552 HOTSPOT_JNI_CALLDOUBLEMETHODA_RETURN())
1553
1554 DT_VOID_RETURN_MARK_DECL(CallVoidMethod, HOTSPOT_JNI_CALLVOIDMETHOD_RETURN());
1555 DT_VOID_RETURN_MARK_DECL(CallVoidMethodV, HOTSPOT_JNI_CALLVOIDMETHODV_RETURN());
1556 DT_VOID_RETURN_MARK_DECL(CallVoidMethodA, HOTSPOT_JNI_CALLVOIDMETHODA_RETURN());
1557
1558
1559 JNI_ENTRY(void, jni_CallVoidMethod(JNIEnv *env, jobject obj, jmethodID methodID, ...))
1560 JNIWrapper("CallVoidMethod");
1561 HOTSPOT_JNI_CALLVOIDMETHOD_ENTRY(env, obj, (uintptr_t) methodID);
1562 DT_VOID_RETURN_MARK(CallVoidMethod);
1563
1564 va_list args;
1565 va_start(args, methodID);
1566 JavaValue jvalue(T_VOID);
1567 JNI_ArgumentPusherVaArg ap(methodID, args);
1568 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK);
1569 va_end(args);
1570 JNI_END
1571
1572
1573 JNI_ENTRY(void, jni_CallVoidMethodV(JNIEnv *env, jobject obj, jmethodID methodID, va_list args))
1574 JNIWrapper("CallVoidMethodV");
1575 HOTSPOT_JNI_CALLVOIDMETHODV_ENTRY(env, obj, (uintptr_t) methodID);
1576 DT_VOID_RETURN_MARK(CallVoidMethodV);
1577
1578 JavaValue jvalue(T_VOID);
1579 JNI_ArgumentPusherVaArg ap(methodID, args);
1580 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK);
1581 JNI_END
1582
1583
1584 JNI_ENTRY(void, jni_CallVoidMethodA(JNIEnv *env, jobject obj, jmethodID methodID, const jvalue *args))
1585 JNIWrapper("CallVoidMethodA");
1586 HOTSPOT_JNI_CALLVOIDMETHODA_ENTRY(env, obj, (uintptr_t) methodID);
1587 DT_VOID_RETURN_MARK(CallVoidMethodA);
1588
1589 JavaValue jvalue(T_VOID);
1590 JNI_ArgumentPusherArray ap(methodID, args);
1591 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK);
1592 JNI_END
1593
1594
1595
1596 #define DEFINE_CALLNONVIRTUALMETHOD(ResultType, Result, Tag \
1597 , EntryProbe, ReturnProbe) \
1598 \
1599 DT_RETURN_MARK_DECL_FOR(Result, CallNonvirtual##Result##Method, ResultType \
1600 , ReturnProbe);\
1601 \
1602 JNI_ENTRY(ResultType, \
1603 jni_CallNonvirtual##Result##Method(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, ...)) \
1604 JNIWrapper("CallNonvitual" XSTR(Result) "Method"); \
1605 \
1606 EntryProbe;\
1607 ResultType ret;\
1608 DT_RETURN_MARK_FOR(Result, CallNonvirtual##Result##Method, ResultType, \
1609 (const ResultType&)ret);\
1610 \
1611 va_list args; \
1612 va_start(args, methodID); \
1613 JavaValue jvalue(Tag); \
1614 JNI_ArgumentPusherVaArg ap(methodID, args); \
1615 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_0); \
1616 va_end(args); \
1617 ret = jvalue.get_##ResultType(); \
1618 return ret;\
1619 JNI_END
1620
1621 // the runtime type of subword integral basic types is integer
1622 DEFINE_CALLNONVIRTUALMETHOD(jboolean, Boolean, T_BOOLEAN
1623 , HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1624 HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHOD_RETURN(_ret_ref))
1625 DEFINE_CALLNONVIRTUALMETHOD(jbyte, Byte, T_BYTE
1626 , HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1627 HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHOD_RETURN(_ret_ref))
1628 DEFINE_CALLNONVIRTUALMETHOD(jchar, Char, T_CHAR
1629 , HOTSPOT_JNI_CALLNONVIRTUALCHARMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1630 HOTSPOT_JNI_CALLNONVIRTUALCHARMETHOD_RETURN(_ret_ref))
1631 DEFINE_CALLNONVIRTUALMETHOD(jshort, Short, T_SHORT
1632 , HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1633 HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHOD_RETURN(_ret_ref))
1634
1635 DEFINE_CALLNONVIRTUALMETHOD(jobject, Object, T_OBJECT
1636 , HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1637 HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHOD_RETURN(_ret_ref))
1638 DEFINE_CALLNONVIRTUALMETHOD(jint, Int, T_INT
1639 , HOTSPOT_JNI_CALLNONVIRTUALINTMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1640 HOTSPOT_JNI_CALLNONVIRTUALINTMETHOD_RETURN(_ret_ref))
1641 DEFINE_CALLNONVIRTUALMETHOD(jlong, Long, T_LONG
1642 , HOTSPOT_JNI_CALLNONVIRTUALLONGMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1643 // Float and double probes don't return value because dtrace doesn't currently support it
1644 HOTSPOT_JNI_CALLNONVIRTUALLONGMETHOD_RETURN(_ret_ref))
1645 DEFINE_CALLNONVIRTUALMETHOD(jfloat, Float, T_FLOAT
1646 , HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1647 HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHOD_RETURN())
1648 DEFINE_CALLNONVIRTUALMETHOD(jdouble, Double, T_DOUBLE
1649 , HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1650 HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHOD_RETURN())
1651
1652 #define DEFINE_CALLNONVIRTUALMETHODV(ResultType, Result, Tag \
1653 , EntryProbe, ReturnProbe) \
1654 \
1655 DT_RETURN_MARK_DECL_FOR(Result, CallNonvirtual##Result##MethodV, ResultType \
1656 , ReturnProbe);\
1657 \
1658 JNI_ENTRY(ResultType, \
1659 jni_CallNonvirtual##Result##MethodV(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, va_list args)) \
1660 JNIWrapper("CallNonvitual" XSTR(Result) "MethodV"); \
1661 \
1662 EntryProbe;\
1663 ResultType ret;\
1664 DT_RETURN_MARK_FOR(Result, CallNonvirtual##Result##MethodV, ResultType, \
1665 (const ResultType&)ret);\
1666 \
1667 JavaValue jvalue(Tag); \
1668 JNI_ArgumentPusherVaArg ap(methodID, args); \
1669 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_0); \
1670 ret = jvalue.get_##ResultType(); \
1671 return ret;\
1672 JNI_END
1673
1674 // the runtime type of subword integral basic types is integer
1675 DEFINE_CALLNONVIRTUALMETHODV(jboolean, Boolean, T_BOOLEAN
1676 , HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1677 HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHODV_RETURN(_ret_ref))
1678 DEFINE_CALLNONVIRTUALMETHODV(jbyte, Byte, T_BYTE
1679 , HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1680 HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHODV_RETURN(_ret_ref))
1681 DEFINE_CALLNONVIRTUALMETHODV(jchar, Char, T_CHAR
1682 , HOTSPOT_JNI_CALLNONVIRTUALCHARMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1683 HOTSPOT_JNI_CALLNONVIRTUALCHARMETHODV_RETURN(_ret_ref))
1684 DEFINE_CALLNONVIRTUALMETHODV(jshort, Short, T_SHORT
1685 , HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1686 HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHODV_RETURN(_ret_ref))
1687
1688 DEFINE_CALLNONVIRTUALMETHODV(jobject, Object, T_OBJECT
1689 , HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1690 HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHODV_RETURN(_ret_ref))
1691 DEFINE_CALLNONVIRTUALMETHODV(jint, Int, T_INT
1692 , HOTSPOT_JNI_CALLNONVIRTUALINTMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1693 HOTSPOT_JNI_CALLNONVIRTUALINTMETHODV_RETURN(_ret_ref))
1694 DEFINE_CALLNONVIRTUALMETHODV(jlong, Long, T_LONG
1695 , HOTSPOT_JNI_CALLNONVIRTUALLONGMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1696 // Float and double probes don't return value because dtrace doesn't currently support it
1697 HOTSPOT_JNI_CALLNONVIRTUALLONGMETHODV_RETURN(_ret_ref))
1698 DEFINE_CALLNONVIRTUALMETHODV(jfloat, Float, T_FLOAT
1699 , HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1700 HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHODV_RETURN())
1701 DEFINE_CALLNONVIRTUALMETHODV(jdouble, Double, T_DOUBLE
1702 , HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1703 HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHODV_RETURN())
1704
1705 #define DEFINE_CALLNONVIRTUALMETHODA(ResultType, Result, Tag \
1706 , EntryProbe, ReturnProbe) \
1707 \
1708 DT_RETURN_MARK_DECL_FOR(Result, CallNonvirtual##Result##MethodA, ResultType \
1709 , ReturnProbe);\
1710 \
1711 JNI_ENTRY(ResultType, \
1712 jni_CallNonvirtual##Result##MethodA(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, const jvalue *args)) \
1713 JNIWrapper("CallNonvitual" XSTR(Result) "MethodA"); \
1714 \
1715 EntryProbe;\
1716 ResultType ret;\
1717 DT_RETURN_MARK_FOR(Result, CallNonvirtual##Result##MethodA, ResultType, \
1718 (const ResultType&)ret);\
1719 \
1720 JavaValue jvalue(Tag); \
1721 JNI_ArgumentPusherArray ap(methodID, args); \
1722 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_0); \
1723 ret = jvalue.get_##ResultType(); \
1724 return ret;\
1725 JNI_END
1726
1727 // the runtime type of subword integral basic types is integer
1728 DEFINE_CALLNONVIRTUALMETHODA(jboolean, Boolean, T_BOOLEAN
1729 , HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1730 HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHODA_RETURN(_ret_ref))
1731 DEFINE_CALLNONVIRTUALMETHODA(jbyte, Byte, T_BYTE
1732 , HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1733 HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHODA_RETURN(_ret_ref))
1734 DEFINE_CALLNONVIRTUALMETHODA(jchar, Char, T_CHAR
1735 , HOTSPOT_JNI_CALLNONVIRTUALCHARMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1736 HOTSPOT_JNI_CALLNONVIRTUALCHARMETHODA_RETURN(_ret_ref))
1737 DEFINE_CALLNONVIRTUALMETHODA(jshort, Short, T_SHORT
1738 , HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1739 HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHODA_RETURN(_ret_ref))
1740
1741 DEFINE_CALLNONVIRTUALMETHODA(jobject, Object, T_OBJECT
1742 , HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1743 HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHODA_RETURN(_ret_ref))
1744 DEFINE_CALLNONVIRTUALMETHODA(jint, Int, T_INT
1745 , HOTSPOT_JNI_CALLNONVIRTUALINTMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1746 HOTSPOT_JNI_CALLNONVIRTUALINTMETHODA_RETURN(_ret_ref))
1747 DEFINE_CALLNONVIRTUALMETHODA(jlong, Long, T_LONG
1748 , HOTSPOT_JNI_CALLNONVIRTUALLONGMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1749 // Float and double probes don't return value because dtrace doesn't currently support it
1750 HOTSPOT_JNI_CALLNONVIRTUALLONGMETHODA_RETURN(_ret_ref))
1751 DEFINE_CALLNONVIRTUALMETHODA(jfloat, Float, T_FLOAT
1752 , HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1753 HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHODA_RETURN())
1754 DEFINE_CALLNONVIRTUALMETHODA(jdouble, Double, T_DOUBLE
1755 , HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1756 HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHODA_RETURN())
1757
1758 DT_VOID_RETURN_MARK_DECL(CallNonvirtualVoidMethod
1759 , HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHOD_RETURN());
1760 DT_VOID_RETURN_MARK_DECL(CallNonvirtualVoidMethodV
1761 , HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHODV_RETURN());
1762 DT_VOID_RETURN_MARK_DECL(CallNonvirtualVoidMethodA
1763 , HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHODA_RETURN());
1764
1765 JNI_ENTRY(void, jni_CallNonvirtualVoidMethod(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, ...))
1766 JNIWrapper("CallNonvirtualVoidMethod");
1767
1768 HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHOD_ENTRY(env, obj, cls, (uintptr_t) methodID);
1769 DT_VOID_RETURN_MARK(CallNonvirtualVoidMethod);
1770
1771 va_list args;
1772 va_start(args, methodID);
1773 JavaValue jvalue(T_VOID);
1774 JNI_ArgumentPusherVaArg ap(methodID, args);
1775 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK);
1776 va_end(args);
1777 JNI_END
1778
1779
1780 JNI_ENTRY(void, jni_CallNonvirtualVoidMethodV(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, va_list args))
1781 JNIWrapper("CallNonvirtualVoidMethodV");
1782
1783 HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHODV_ENTRY(
1784 env, obj, cls, (uintptr_t) methodID);
1785 DT_VOID_RETURN_MARK(CallNonvirtualVoidMethodV);
1786
1787 JavaValue jvalue(T_VOID);
1788 JNI_ArgumentPusherVaArg ap(methodID, args);
1789 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK);
1790 JNI_END
1791
1792
1793 JNI_ENTRY(void, jni_CallNonvirtualVoidMethodA(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, const jvalue *args))
1794 JNIWrapper("CallNonvirtualVoidMethodA");
1795 HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHODA_ENTRY(
1796 env, obj, cls, (uintptr_t) methodID);
1797 DT_VOID_RETURN_MARK(CallNonvirtualVoidMethodA);
1798 JavaValue jvalue(T_VOID);
1799 JNI_ArgumentPusherArray ap(methodID, args);
1800 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK);
1801 JNI_END
1802
1803
1804
1805 #define DEFINE_CALLSTATICMETHOD(ResultType, Result, Tag \
1806 , EntryProbe, ResultProbe) \
1807 \
1808 DT_RETURN_MARK_DECL_FOR(Result, CallStatic##Result##Method, ResultType \
1809 , ResultProbe); \
1810 \
1811 JNI_ENTRY(ResultType, \
1812 jni_CallStatic##Result##Method(JNIEnv *env, jclass cls, jmethodID methodID, ...)) \
1813 JNIWrapper("CallStatic" XSTR(Result) "Method"); \
1814 \
1815 EntryProbe; \
1816 ResultType ret = 0;\
1817 DT_RETURN_MARK_FOR(Result, CallStatic##Result##Method, ResultType, \
1818 (const ResultType&)ret);\
1819 \
1820 va_list args; \
1821 va_start(args, methodID); \
1822 JavaValue jvalue(Tag); \
1823 JNI_ArgumentPusherVaArg ap(methodID, args); \
1824 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK_0); \
1825 va_end(args); \
1826 ret = jvalue.get_##ResultType(); \
1827 return ret;\
1828 JNI_END
1829
1830 // the runtime type of subword integral basic types is integer
1831 DEFINE_CALLSTATICMETHOD(jboolean, Boolean, T_BOOLEAN
1832 , HOTSPOT_JNI_CALLSTATICBOOLEANMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1833 HOTSPOT_JNI_CALLSTATICBOOLEANMETHOD_RETURN(_ret_ref));
1834 DEFINE_CALLSTATICMETHOD(jbyte, Byte, T_BYTE
1835 , HOTSPOT_JNI_CALLSTATICBYTEMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1836 HOTSPOT_JNI_CALLSTATICBYTEMETHOD_RETURN(_ret_ref));
1837 DEFINE_CALLSTATICMETHOD(jchar, Char, T_CHAR
1838 , HOTSPOT_JNI_CALLSTATICCHARMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1839 HOTSPOT_JNI_CALLSTATICCHARMETHOD_RETURN(_ret_ref));
1840 DEFINE_CALLSTATICMETHOD(jshort, Short, T_SHORT
1841 , HOTSPOT_JNI_CALLSTATICSHORTMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1842 HOTSPOT_JNI_CALLSTATICSHORTMETHOD_RETURN(_ret_ref));
1843
1844 DEFINE_CALLSTATICMETHOD(jobject, Object, T_OBJECT
1845 , HOTSPOT_JNI_CALLSTATICOBJECTMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1846 HOTSPOT_JNI_CALLSTATICOBJECTMETHOD_RETURN(_ret_ref));
1847 DEFINE_CALLSTATICMETHOD(jint, Int, T_INT
1848 , HOTSPOT_JNI_CALLSTATICINTMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1849 HOTSPOT_JNI_CALLSTATICINTMETHOD_RETURN(_ret_ref));
1850 DEFINE_CALLSTATICMETHOD(jlong, Long, T_LONG
1851 , HOTSPOT_JNI_CALLSTATICLONGMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1852 HOTSPOT_JNI_CALLSTATICLONGMETHOD_RETURN(_ret_ref));
1853 // Float and double probes don't return value because dtrace doesn't currently support it
1854 DEFINE_CALLSTATICMETHOD(jfloat, Float, T_FLOAT
1855 , HOTSPOT_JNI_CALLSTATICFLOATMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1856 HOTSPOT_JNI_CALLSTATICFLOATMETHOD_RETURN());
1857 DEFINE_CALLSTATICMETHOD(jdouble, Double, T_DOUBLE
1858 , HOTSPOT_JNI_CALLSTATICDOUBLEMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1859 HOTSPOT_JNI_CALLSTATICDOUBLEMETHOD_RETURN());
1860
1861 #define DEFINE_CALLSTATICMETHODV(ResultType, Result, Tag \
1862 , EntryProbe, ResultProbe) \
1863 \
1864 DT_RETURN_MARK_DECL_FOR(Result, CallStatic##Result##MethodV, ResultType \
1865 , ResultProbe); \
1866 \
1867 JNI_ENTRY(ResultType, \
1868 jni_CallStatic##Result##MethodV(JNIEnv *env, jclass cls, jmethodID methodID, va_list args)) \
1869 JNIWrapper("CallStatic" XSTR(Result) "MethodV"); \
1870 \
1871 EntryProbe; \
1872 ResultType ret = 0;\
1873 DT_RETURN_MARK_FOR(Result, CallStatic##Result##MethodV, ResultType, \
1874 (const ResultType&)ret);\
1875 \
1876 JavaValue jvalue(Tag); \
1877 JNI_ArgumentPusherVaArg ap(methodID, args); \
1878 /* Make sure class is initialized before trying to invoke its method */ \
1879 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); \
1880 k->initialize(CHECK_0); \
1881 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK_0); \
1882 va_end(args); \
1883 ret = jvalue.get_##ResultType(); \
1884 return ret;\
1885 JNI_END
1886
1887 // the runtime type of subword integral basic types is integer
1888 DEFINE_CALLSTATICMETHODV(jboolean, Boolean, T_BOOLEAN
1889 , HOTSPOT_JNI_CALLSTATICBOOLEANMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1890 HOTSPOT_JNI_CALLSTATICBOOLEANMETHODV_RETURN(_ret_ref));
1891 DEFINE_CALLSTATICMETHODV(jbyte, Byte, T_BYTE
1892 , HOTSPOT_JNI_CALLSTATICBYTEMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1893 HOTSPOT_JNI_CALLSTATICBYTEMETHODV_RETURN(_ret_ref));
1894 DEFINE_CALLSTATICMETHODV(jchar, Char, T_CHAR
1895 , HOTSPOT_JNI_CALLSTATICCHARMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1896 HOTSPOT_JNI_CALLSTATICCHARMETHODV_RETURN(_ret_ref));
1897 DEFINE_CALLSTATICMETHODV(jshort, Short, T_SHORT
1898 , HOTSPOT_JNI_CALLSTATICSHORTMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1899 HOTSPOT_JNI_CALLSTATICSHORTMETHODV_RETURN(_ret_ref));
1900
1901 DEFINE_CALLSTATICMETHODV(jobject, Object, T_OBJECT
1902 , HOTSPOT_JNI_CALLSTATICOBJECTMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1903 HOTSPOT_JNI_CALLSTATICOBJECTMETHODV_RETURN(_ret_ref));
1904 DEFINE_CALLSTATICMETHODV(jint, Int, T_INT
1905 , HOTSPOT_JNI_CALLSTATICINTMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1906 HOTSPOT_JNI_CALLSTATICINTMETHODV_RETURN(_ret_ref));
1907 DEFINE_CALLSTATICMETHODV(jlong, Long, T_LONG
1908 , HOTSPOT_JNI_CALLSTATICLONGMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1909 HOTSPOT_JNI_CALLSTATICLONGMETHODV_RETURN(_ret_ref));
1910 // Float and double probes don't return value because dtrace doesn't currently support it
1911 DEFINE_CALLSTATICMETHODV(jfloat, Float, T_FLOAT
1912 , HOTSPOT_JNI_CALLSTATICFLOATMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1913 HOTSPOT_JNI_CALLSTATICFLOATMETHODV_RETURN());
1914 DEFINE_CALLSTATICMETHODV(jdouble, Double, T_DOUBLE
1915 , HOTSPOT_JNI_CALLSTATICDOUBLEMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1916 HOTSPOT_JNI_CALLSTATICDOUBLEMETHODV_RETURN());
1917
1918 #define DEFINE_CALLSTATICMETHODA(ResultType, Result, Tag \
1919 , EntryProbe, ResultProbe) \
1920 \
1921 DT_RETURN_MARK_DECL_FOR(Result, CallStatic##Result##MethodA, ResultType \
1922 , ResultProbe); \
1923 \
1924 JNI_ENTRY(ResultType, \
1925 jni_CallStatic##Result##MethodA(JNIEnv *env, jclass cls, jmethodID methodID, const jvalue *args)) \
1926 JNIWrapper("CallStatic" XSTR(Result) "MethodA"); \
1927 \
1928 EntryProbe; \
1929 ResultType ret = 0;\
1930 DT_RETURN_MARK_FOR(Result, CallStatic##Result##MethodA, ResultType, \
1931 (const ResultType&)ret);\
1932 \
1933 JavaValue jvalue(Tag); \
1934 JNI_ArgumentPusherArray ap(methodID, args); \
1935 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK_0); \
1936 ret = jvalue.get_##ResultType(); \
1937 return ret;\
1938 JNI_END
1939
1940 // the runtime type of subword integral basic types is integer
1941 DEFINE_CALLSTATICMETHODA(jboolean, Boolean, T_BOOLEAN
1942 , HOTSPOT_JNI_CALLSTATICBOOLEANMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1943 HOTSPOT_JNI_CALLSTATICBOOLEANMETHODA_RETURN(_ret_ref));
1944 DEFINE_CALLSTATICMETHODA(jbyte, Byte, T_BYTE
1945 , HOTSPOT_JNI_CALLSTATICBYTEMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1946 HOTSPOT_JNI_CALLSTATICBYTEMETHODA_RETURN(_ret_ref));
1947 DEFINE_CALLSTATICMETHODA(jchar, Char, T_CHAR
1948 , HOTSPOT_JNI_CALLSTATICCHARMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1949 HOTSPOT_JNI_CALLSTATICCHARMETHODA_RETURN(_ret_ref));
1950 DEFINE_CALLSTATICMETHODA(jshort, Short, T_SHORT
1951 , HOTSPOT_JNI_CALLSTATICSHORTMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1952 HOTSPOT_JNI_CALLSTATICSHORTMETHODA_RETURN(_ret_ref));
1953
1954 DEFINE_CALLSTATICMETHODA(jobject, Object, T_OBJECT
1955 , HOTSPOT_JNI_CALLSTATICOBJECTMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1956 HOTSPOT_JNI_CALLSTATICOBJECTMETHODA_RETURN(_ret_ref));
1957 DEFINE_CALLSTATICMETHODA(jint, Int, T_INT
1958 , HOTSPOT_JNI_CALLSTATICINTMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1959 HOTSPOT_JNI_CALLSTATICINTMETHODA_RETURN(_ret_ref));
1960 DEFINE_CALLSTATICMETHODA(jlong, Long, T_LONG
1961 , HOTSPOT_JNI_CALLSTATICLONGMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1962 HOTSPOT_JNI_CALLSTATICLONGMETHODA_RETURN(_ret_ref));
1963 // Float and double probes don't return value because dtrace doesn't currently support it
1964 DEFINE_CALLSTATICMETHODA(jfloat, Float, T_FLOAT
1965 , HOTSPOT_JNI_CALLSTATICFLOATMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1966 HOTSPOT_JNI_CALLSTATICFLOATMETHODA_RETURN());
1967 DEFINE_CALLSTATICMETHODA(jdouble, Double, T_DOUBLE
1968 , HOTSPOT_JNI_CALLSTATICDOUBLEMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1969 HOTSPOT_JNI_CALLSTATICDOUBLEMETHODA_RETURN());
1970
1971 DT_VOID_RETURN_MARK_DECL(CallStaticVoidMethod
1972 , HOTSPOT_JNI_CALLSTATICVOIDMETHOD_RETURN());
1973 DT_VOID_RETURN_MARK_DECL(CallStaticVoidMethodV
1974 , HOTSPOT_JNI_CALLSTATICVOIDMETHODV_RETURN());
1975 DT_VOID_RETURN_MARK_DECL(CallStaticVoidMethodA
1976 , HOTSPOT_JNI_CALLSTATICVOIDMETHODA_RETURN());
1977
1978 JNI_ENTRY(void, jni_CallStaticVoidMethod(JNIEnv *env, jclass cls, jmethodID methodID, ...))
1979 JNIWrapper("CallStaticVoidMethod");
1980 HOTSPOT_JNI_CALLSTATICVOIDMETHOD_ENTRY(env, cls, (uintptr_t) methodID);
1981 DT_VOID_RETURN_MARK(CallStaticVoidMethod);
1982
1983 va_list args;
1984 va_start(args, methodID);
1985 JavaValue jvalue(T_VOID);
1986 JNI_ArgumentPusherVaArg ap(methodID, args);
1987 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK);
1988 va_end(args);
1989 JNI_END
1990
1991
1992 JNI_ENTRY(void, jni_CallStaticVoidMethodV(JNIEnv *env, jclass cls, jmethodID methodID, va_list args))
1993 JNIWrapper("CallStaticVoidMethodV");
1994 HOTSPOT_JNI_CALLSTATICVOIDMETHODV_ENTRY(env, cls, (uintptr_t) methodID);
1995 DT_VOID_RETURN_MARK(CallStaticVoidMethodV);
1996
1997 JavaValue jvalue(T_VOID);
1998 JNI_ArgumentPusherVaArg ap(methodID, args);
1999 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK);
2000 JNI_END
2001
2002
2003 JNI_ENTRY(void, jni_CallStaticVoidMethodA(JNIEnv *env, jclass cls, jmethodID methodID, const jvalue *args))
2004 JNIWrapper("CallStaticVoidMethodA");
2005 HOTSPOT_JNI_CALLSTATICVOIDMETHODA_ENTRY(env, cls, (uintptr_t) methodID);
2006 DT_VOID_RETURN_MARK(CallStaticVoidMethodA);
2007
2008 JavaValue jvalue(T_VOID);
2009 JNI_ArgumentPusherArray ap(methodID, args);
2010 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK);
2011 JNI_END
2012
2013
2014 //
2015 // Accessing Fields
2016 //
2017
2018
2019 DT_RETURN_MARK_DECL(GetFieldID, jfieldID
2020 , HOTSPOT_JNI_GETFIELDID_RETURN((uintptr_t)_ret_ref));
2021
2022 JNI_ENTRY(jfieldID, jni_GetFieldID(JNIEnv *env, jclass clazz,
2023 const char *name, const char *sig))
2024 JNIWrapper("GetFieldID");
2025 HOTSPOT_JNI_GETFIELDID_ENTRY(env, clazz, (char *) name, (char *) sig);
2026 jfieldID ret = 0;
2027 DT_RETURN_MARK(GetFieldID, jfieldID, (const jfieldID&)ret);
2028
2029 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz));
2030
2031 // The class should have been loaded (we have an instance of the class
2032 // passed in) so the field and signature should already be in the symbol
2033 // table. If they're not there, the field doesn't exist.
2034 TempNewSymbol fieldname = SymbolTable::probe(name, (int)strlen(name));
2035 TempNewSymbol signame = SymbolTable::probe(sig, (int)strlen(sig));
2036 if (fieldname == NULL || signame == NULL) {
2037 ResourceMark rm;
2038 THROW_MSG_0(vmSymbols::java_lang_NoSuchFieldError(), err_msg("%s.%s %s", k->external_name(), name, sig));
2039 }
2040
2041 // Make sure class is initialized before handing id's out to fields
2042 k->initialize(CHECK_NULL);
2043
2044 fieldDescriptor fd;
2045 if (!k->is_instance_klass() ||
2046 !InstanceKlass::cast(k)->find_field(fieldname, signame, false, &fd)) {
2047 ResourceMark rm;
2048 THROW_MSG_0(vmSymbols::java_lang_NoSuchFieldError(), err_msg("%s.%s %s", k->external_name(), name, sig));
2049 }
2050
2051 // A jfieldID for a non-static field is simply the offset of the field within the instanceOop
2052 // It may also have hash bits for k, if VerifyJNIFields is turned on.
2053 ret = jfieldIDWorkaround::to_instance_jfieldID(k, fd.offset());
2054 return ret;
2055 JNI_END
2056
2057
2058 JNI_ENTRY(jobject, jni_GetObjectField(JNIEnv *env, jobject obj, jfieldID fieldID))
2059 JNIWrapper("GetObjectField");
2060 HOTSPOT_JNI_GETOBJECTFIELD_ENTRY(env, obj, (uintptr_t) fieldID);
2061 oop o = JNIHandles::resolve_non_null(obj);
2062 Klass* k = o->klass();
2063 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID);
2064 // Keep JVMTI addition small and only check enabled flag here.
2065 // jni_GetField_probe() assumes that is okay to create handles.
2066 if (JvmtiExport::should_post_field_access()) {
2067 o = JvmtiExport::jni_GetField_probe(thread, obj, o, k, fieldID, false);
2068 }
2069 oop loaded_obj = HeapAccess<ON_UNKNOWN_OOP_REF>::oop_load_at(o, offset);
2070 jobject ret = JNIHandles::make_local(env, loaded_obj);
2071 HOTSPOT_JNI_GETOBJECTFIELD_RETURN(ret);
2072 return ret;
2073 JNI_END
2074
2075
2076
2077 #define DEFINE_GETFIELD(Return,Fieldname,Result \
2078 , EntryProbe, ReturnProbe) \
2079 \
2080 DT_RETURN_MARK_DECL_FOR(Result, Get##Result##Field, Return \
2081 , ReturnProbe); \
2082 \
2083 JNI_ENTRY_NO_PRESERVE(Return, jni_Get##Result##Field(JNIEnv *env, jobject obj, jfieldID fieldID)) \
2084 JNIWrapper("Get" XSTR(Result) "Field"); \
2085 \
2086 EntryProbe; \
2087 Return ret = 0;\
2088 DT_RETURN_MARK_FOR(Result, Get##Result##Field, Return, (const Return&)ret);\
2089 \
2090 oop o = JNIHandles::resolve_non_null(obj); \
2091 Klass* k = o->klass(); \
2092 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID); \
2093 /* Keep JVMTI addition small and only check enabled flag here. */ \
2094 /* jni_GetField_probe_nh() assumes that is not okay to create handles */ \
2095 /* and creates a ResetNoHandleMark. */ \
2096 if (JvmtiExport::should_post_field_access()) { \
2097 o = JvmtiExport::jni_GetField_probe_nh(thread, obj, o, k, fieldID, false); \
2098 } \
2099 ret = o->Fieldname##_field(offset); \
2100 return ret; \
2101 JNI_END
2102
2103 DEFINE_GETFIELD(jboolean, bool, Boolean
2104 , HOTSPOT_JNI_GETBOOLEANFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2105 HOTSPOT_JNI_GETBOOLEANFIELD_RETURN(_ret_ref))
2106 DEFINE_GETFIELD(jbyte, byte, Byte
2107 , HOTSPOT_JNI_GETBYTEFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2108 HOTSPOT_JNI_GETBYTEFIELD_RETURN(_ret_ref))
2109 DEFINE_GETFIELD(jchar, char, Char
2110 , HOTSPOT_JNI_GETCHARFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2111 HOTSPOT_JNI_GETCHARFIELD_RETURN(_ret_ref))
2112 DEFINE_GETFIELD(jshort, short, Short
2113 , HOTSPOT_JNI_GETSHORTFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2114 HOTSPOT_JNI_GETSHORTFIELD_RETURN(_ret_ref))
2115 DEFINE_GETFIELD(jint, int, Int
2116 , HOTSPOT_JNI_GETINTFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2117 HOTSPOT_JNI_GETINTFIELD_RETURN(_ret_ref))
2118 DEFINE_GETFIELD(jlong, long, Long
2119 , HOTSPOT_JNI_GETLONGFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2120 HOTSPOT_JNI_GETLONGFIELD_RETURN(_ret_ref))
2121 // Float and double probes don't return value because dtrace doesn't currently support it
2122 DEFINE_GETFIELD(jfloat, float, Float
2123 , HOTSPOT_JNI_GETFLOATFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2124 HOTSPOT_JNI_GETFLOATFIELD_RETURN())
2125 DEFINE_GETFIELD(jdouble, double, Double
2126 , HOTSPOT_JNI_GETDOUBLEFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2127 HOTSPOT_JNI_GETDOUBLEFIELD_RETURN())
2128
2129 address jni_GetBooleanField_addr() {
2130 return (address)jni_GetBooleanField;
2131 }
2132 address jni_GetByteField_addr() {
2133 return (address)jni_GetByteField;
2134 }
2135 address jni_GetCharField_addr() {
2136 return (address)jni_GetCharField;
2137 }
2138 address jni_GetShortField_addr() {
2139 return (address)jni_GetShortField;
2140 }
2141 address jni_GetIntField_addr() {
2142 return (address)jni_GetIntField;
2143 }
2144 address jni_GetLongField_addr() {
2145 return (address)jni_GetLongField;
2146 }
2147 address jni_GetFloatField_addr() {
2148 return (address)jni_GetFloatField;
2149 }
2150 address jni_GetDoubleField_addr() {
2151 return (address)jni_GetDoubleField;
2152 }
2153
2154 JNI_ENTRY_NO_PRESERVE(void, jni_SetObjectField(JNIEnv *env, jobject obj, jfieldID fieldID, jobject value))
2155 JNIWrapper("SetObjectField");
2156 HOTSPOT_JNI_SETOBJECTFIELD_ENTRY(env, obj, (uintptr_t) fieldID, value);
2157 oop o = JNIHandles::resolve_non_null(obj);
2158 Klass* k = o->klass();
2159 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID);
2160 // Keep JVMTI addition small and only check enabled flag here.
2161 // jni_SetField_probe_nh() assumes that is not okay to create handles
2162 // and creates a ResetNoHandleMark.
2163 if (JvmtiExport::should_post_field_modification()) {
2164 jvalue field_value;
2165 field_value.l = value;
2166 o = JvmtiExport::jni_SetField_probe_nh(thread, obj, o, k, fieldID, false, 'L', (jvalue *)&field_value);
2167 }
2168 HeapAccess<ON_UNKNOWN_OOP_REF>::oop_store_at(o, offset, JNIHandles::resolve(value));
2169 HOTSPOT_JNI_SETOBJECTFIELD_RETURN();
2170 JNI_END
2171
2172
2173 #define DEFINE_SETFIELD(Argument,Fieldname,Result,SigType,unionType \
2174 , EntryProbe, ReturnProbe) \
2175 \
2176 JNI_ENTRY_NO_PRESERVE(void, jni_Set##Result##Field(JNIEnv *env, jobject obj, jfieldID fieldID, Argument value)) \
2177 JNIWrapper("Set" XSTR(Result) "Field"); \
2178 \
2179 EntryProbe; \
2180 \
2181 oop o = JNIHandles::resolve_non_null(obj); \
2182 Klass* k = o->klass(); \
2183 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID); \
2184 /* Keep JVMTI addition small and only check enabled flag here. */ \
2185 /* jni_SetField_probe_nh() assumes that is not okay to create handles */ \
2186 /* and creates a ResetNoHandleMark. */ \
2187 if (JvmtiExport::should_post_field_modification()) { \
2188 jvalue field_value; \
2189 field_value.unionType = value; \
2190 o = JvmtiExport::jni_SetField_probe_nh(thread, obj, o, k, fieldID, false, SigType, (jvalue *)&field_value); \
2191 } \
2192 if (SigType == 'Z') { value = ((jboolean)value) & 1; } \
2193 o->Fieldname##_field_put(offset, value); \
2194 ReturnProbe; \
2195 JNI_END
2196
2197 DEFINE_SETFIELD(jboolean, bool, Boolean, 'Z', z
2198 , HOTSPOT_JNI_SETBOOLEANFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value),
2199 HOTSPOT_JNI_SETBOOLEANFIELD_RETURN())
2200 DEFINE_SETFIELD(jbyte, byte, Byte, 'B', b
2201 , HOTSPOT_JNI_SETBYTEFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value),
2202 HOTSPOT_JNI_SETBYTEFIELD_RETURN())
2203 DEFINE_SETFIELD(jchar, char, Char, 'C', c
2204 , HOTSPOT_JNI_SETCHARFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value),
2205 HOTSPOT_JNI_SETCHARFIELD_RETURN())
2206 DEFINE_SETFIELD(jshort, short, Short, 'S', s
2207 , HOTSPOT_JNI_SETSHORTFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value),
2208 HOTSPOT_JNI_SETSHORTFIELD_RETURN())
2209 DEFINE_SETFIELD(jint, int, Int, 'I', i
2210 , HOTSPOT_JNI_SETINTFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value),
2211 HOTSPOT_JNI_SETINTFIELD_RETURN())
2212 DEFINE_SETFIELD(jlong, long, Long, 'J', j
2213 , HOTSPOT_JNI_SETLONGFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value),
2214 HOTSPOT_JNI_SETLONGFIELD_RETURN())
2215 // Float and double probes don't return value because dtrace doesn't currently support it
2216 DEFINE_SETFIELD(jfloat, float, Float, 'F', f
2217 , HOTSPOT_JNI_SETFLOATFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2218 HOTSPOT_JNI_SETFLOATFIELD_RETURN())
2219 DEFINE_SETFIELD(jdouble, double, Double, 'D', d
2220 , HOTSPOT_JNI_SETDOUBLEFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2221 HOTSPOT_JNI_SETDOUBLEFIELD_RETURN())
2222
2223 DT_RETURN_MARK_DECL(ToReflectedField, jobject
2224 , HOTSPOT_JNI_TOREFLECTEDFIELD_RETURN(_ret_ref));
2225
2226 JNI_ENTRY(jobject, jni_ToReflectedField(JNIEnv *env, jclass cls, jfieldID fieldID, jboolean isStatic))
2227 JNIWrapper("ToReflectedField");
2228 HOTSPOT_JNI_TOREFLECTEDFIELD_ENTRY(env, cls, (uintptr_t) fieldID, isStatic);
2229 jobject ret = NULL;
2230 DT_RETURN_MARK(ToReflectedField, jobject, (const jobject&)ret);
2231
2232 fieldDescriptor fd;
2233 bool found = false;
2234 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2235
2236 assert(jfieldIDWorkaround::is_static_jfieldID(fieldID) == (isStatic != 0), "invalid fieldID");
2237
2238 if (isStatic) {
2239 // Static field. The fieldID a JNIid specifying the field holder and the offset within the Klass*.
2240 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID);
2241 assert(id->is_static_field_id(), "invalid static field id");
2242 found = id->find_local_field(&fd);
2243 } else {
2244 // Non-static field. The fieldID is really the offset of the field within the instanceOop.
2245 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID);
2246 found = InstanceKlass::cast(k)->find_field_from_offset(offset, false, &fd);
2247 }
2248 assert(found, "bad fieldID passed into jni_ToReflectedField");
2249 oop reflected = Reflection::new_field(&fd, CHECK_NULL);
2250 ret = JNIHandles::make_local(env, reflected);
2251 return ret;
2252 JNI_END
2253
2254
2255 //
2256 // Accessing Static Fields
2257 //
2258 DT_RETURN_MARK_DECL(GetStaticFieldID, jfieldID
2259 , HOTSPOT_JNI_GETSTATICFIELDID_RETURN((uintptr_t)_ret_ref));
2260
2261 JNI_ENTRY(jfieldID, jni_GetStaticFieldID(JNIEnv *env, jclass clazz,
2262 const char *name, const char *sig))
2263 JNIWrapper("GetStaticFieldID");
2264 HOTSPOT_JNI_GETSTATICFIELDID_ENTRY(env, clazz, (char *) name, (char *) sig);
2265 jfieldID ret = NULL;
2266 DT_RETURN_MARK(GetStaticFieldID, jfieldID, (const jfieldID&)ret);
2267
2268 // The class should have been loaded (we have an instance of the class
2269 // passed in) so the field and signature should already be in the symbol
2270 // table. If they're not there, the field doesn't exist.
2271 TempNewSymbol fieldname = SymbolTable::probe(name, (int)strlen(name));
2272 TempNewSymbol signame = SymbolTable::probe(sig, (int)strlen(sig));
2273 if (fieldname == NULL || signame == NULL) {
2274 THROW_MSG_0(vmSymbols::java_lang_NoSuchFieldError(), (char*) name);
2275 }
2276 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz));
2277 // Make sure class is initialized before handing id's out to static fields
2278 k->initialize(CHECK_NULL);
2279
2280 fieldDescriptor fd;
2281 if (!k->is_instance_klass() ||
2282 !InstanceKlass::cast(k)->find_field(fieldname, signame, true, &fd)) {
2283 THROW_MSG_0(vmSymbols::java_lang_NoSuchFieldError(), (char*) name);
2284 }
2285
2286 // A jfieldID for a static field is a JNIid specifying the field holder and the offset within the Klass*
2287 JNIid* id = fd.field_holder()->jni_id_for(fd.offset());
2288 debug_only(id->set_is_static_field_id();)
2289
2290 debug_only(id->verify(fd.field_holder()));
2291
2292 ret = jfieldIDWorkaround::to_static_jfieldID(id);
2293 return ret;
2294 JNI_END
2295
2296
2297 JNI_ENTRY(jobject, jni_GetStaticObjectField(JNIEnv *env, jclass clazz, jfieldID fieldID))
2298 JNIWrapper("GetStaticObjectField");
2299 HOTSPOT_JNI_GETSTATICOBJECTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID);
2300 #if INCLUDE_JNI_CHECK
2301 DEBUG_ONLY(Klass* param_k = jniCheck::validate_class(thread, clazz);)
2302 #endif // INCLUDE_JNI_CHECK
2303 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID);
2304 assert(id->is_static_field_id(), "invalid static field id");
2305 // Keep JVMTI addition small and only check enabled flag here.
2306 // jni_GetField_probe() assumes that is okay to create handles.
2307 if (JvmtiExport::should_post_field_access()) {
2308 JvmtiExport::jni_GetField_probe(thread, NULL, NULL, id->holder(), fieldID, true);
2309 }
2310 jobject ret = JNIHandles::make_local(id->holder()->java_mirror()->obj_field(id->offset()));
2311 HOTSPOT_JNI_GETSTATICOBJECTFIELD_RETURN(ret);
2312 return ret;
2313 JNI_END
2314
2315
2316 #define DEFINE_GETSTATICFIELD(Return,Fieldname,Result \
2317 , EntryProbe, ReturnProbe) \
2318 \
2319 DT_RETURN_MARK_DECL_FOR(Result, GetStatic##Result##Field, Return \
2320 , ReturnProbe); \
2321 \
2322 JNI_ENTRY(Return, jni_GetStatic##Result##Field(JNIEnv *env, jclass clazz, jfieldID fieldID)) \
2323 JNIWrapper("GetStatic" XSTR(Result) "Field"); \
2324 EntryProbe; \
2325 Return ret = 0;\
2326 DT_RETURN_MARK_FOR(Result, GetStatic##Result##Field, Return, \
2327 (const Return&)ret);\
2328 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID); \
2329 assert(id->is_static_field_id(), "invalid static field id"); \
2330 /* Keep JVMTI addition small and only check enabled flag here. */ \
2331 /* jni_GetField_probe() assumes that is okay to create handles. */ \
2332 if (JvmtiExport::should_post_field_access()) { \
2333 JvmtiExport::jni_GetField_probe(thread, NULL, NULL, id->holder(), fieldID, true); \
2334 } \
2335 ret = id->holder()->java_mirror()-> Fieldname##_field (id->offset()); \
2336 return ret;\
2337 JNI_END
2338
2339 DEFINE_GETSTATICFIELD(jboolean, bool, Boolean
2340 , HOTSPOT_JNI_GETSTATICBOOLEANFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICBOOLEANFIELD_RETURN(_ret_ref))
2341 DEFINE_GETSTATICFIELD(jbyte, byte, Byte
2342 , HOTSPOT_JNI_GETSTATICBYTEFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICBYTEFIELD_RETURN(_ret_ref) )
2343 DEFINE_GETSTATICFIELD(jchar, char, Char
2344 , HOTSPOT_JNI_GETSTATICCHARFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICCHARFIELD_RETURN(_ret_ref) )
2345 DEFINE_GETSTATICFIELD(jshort, short, Short
2346 , HOTSPOT_JNI_GETSTATICSHORTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICSHORTFIELD_RETURN(_ret_ref) )
2347 DEFINE_GETSTATICFIELD(jint, int, Int
2348 , HOTSPOT_JNI_GETSTATICINTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICINTFIELD_RETURN(_ret_ref) )
2349 DEFINE_GETSTATICFIELD(jlong, long, Long
2350 , HOTSPOT_JNI_GETSTATICLONGFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICLONGFIELD_RETURN(_ret_ref) )
2351 // Float and double probes don't return value because dtrace doesn't currently support it
2352 DEFINE_GETSTATICFIELD(jfloat, float, Float
2353 , HOTSPOT_JNI_GETSTATICFLOATFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICFLOATFIELD_RETURN() )
2354 DEFINE_GETSTATICFIELD(jdouble, double, Double
2355 , HOTSPOT_JNI_GETSTATICDOUBLEFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICDOUBLEFIELD_RETURN() )
2356
2357 JNI_ENTRY(void, jni_SetStaticObjectField(JNIEnv *env, jclass clazz, jfieldID fieldID, jobject value))
2358 JNIWrapper("SetStaticObjectField");
2359 HOTSPOT_JNI_SETSTATICOBJECTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value);
2360 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID);
2361 assert(id->is_static_field_id(), "invalid static field id");
2362 // Keep JVMTI addition small and only check enabled flag here.
2363 // jni_SetField_probe() assumes that is okay to create handles.
2364 if (JvmtiExport::should_post_field_modification()) {
2365 jvalue field_value;
2366 field_value.l = value;
2367 JvmtiExport::jni_SetField_probe(thread, NULL, NULL, id->holder(), fieldID, true, 'L', (jvalue *)&field_value);
2368 }
2369 id->holder()->java_mirror()->obj_field_put(id->offset(), JNIHandles::resolve(value));
2370 HOTSPOT_JNI_SETSTATICOBJECTFIELD_RETURN();
2371 JNI_END
2372
2373
2374
2375 #define DEFINE_SETSTATICFIELD(Argument,Fieldname,Result,SigType,unionType \
2376 , EntryProbe, ReturnProbe) \
2377 \
2378 JNI_ENTRY(void, jni_SetStatic##Result##Field(JNIEnv *env, jclass clazz, jfieldID fieldID, Argument value)) \
2379 JNIWrapper("SetStatic" XSTR(Result) "Field"); \
2380 EntryProbe; \
2381 \
2382 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID); \
2383 assert(id->is_static_field_id(), "invalid static field id"); \
2384 /* Keep JVMTI addition small and only check enabled flag here. */ \
2385 /* jni_SetField_probe() assumes that is okay to create handles. */ \
2386 if (JvmtiExport::should_post_field_modification()) { \
2387 jvalue field_value; \
2388 field_value.unionType = value; \
2389 JvmtiExport::jni_SetField_probe(thread, NULL, NULL, id->holder(), fieldID, true, SigType, (jvalue *)&field_value); \
2390 } \
2391 if (SigType == 'Z') { value = ((jboolean)value) & 1; } \
2392 id->holder()->java_mirror()-> Fieldname##_field_put (id->offset(), value); \
2393 ReturnProbe;\
2394 JNI_END
2395
2396 DEFINE_SETSTATICFIELD(jboolean, bool, Boolean, 'Z', z
2397 , HOTSPOT_JNI_SETSTATICBOOLEANFIELD_ENTRY(env, clazz, (uintptr_t)fieldID, value),
2398 HOTSPOT_JNI_SETSTATICBOOLEANFIELD_RETURN())
2399 DEFINE_SETSTATICFIELD(jbyte, byte, Byte, 'B', b
2400 , HOTSPOT_JNI_SETSTATICBYTEFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value),
2401 HOTSPOT_JNI_SETSTATICBYTEFIELD_RETURN())
2402 DEFINE_SETSTATICFIELD(jchar, char, Char, 'C', c
2403 , HOTSPOT_JNI_SETSTATICCHARFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value),
2404 HOTSPOT_JNI_SETSTATICCHARFIELD_RETURN())
2405 DEFINE_SETSTATICFIELD(jshort, short, Short, 'S', s
2406 , HOTSPOT_JNI_SETSTATICSHORTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value),
2407 HOTSPOT_JNI_SETSTATICSHORTFIELD_RETURN())
2408 DEFINE_SETSTATICFIELD(jint, int, Int, 'I', i
2409 , HOTSPOT_JNI_SETSTATICINTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value),
2410 HOTSPOT_JNI_SETSTATICINTFIELD_RETURN())
2411 DEFINE_SETSTATICFIELD(jlong, long, Long, 'J', j
2412 , HOTSPOT_JNI_SETSTATICLONGFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value),
2413 HOTSPOT_JNI_SETSTATICLONGFIELD_RETURN())
2414 // Float and double probes don't return value because dtrace doesn't currently support it
2415 DEFINE_SETSTATICFIELD(jfloat, float, Float, 'F', f
2416 , HOTSPOT_JNI_SETSTATICFLOATFIELD_ENTRY(env, clazz, (uintptr_t) fieldID),
2417 HOTSPOT_JNI_SETSTATICFLOATFIELD_RETURN())
2418 DEFINE_SETSTATICFIELD(jdouble, double, Double, 'D', d
2419 , HOTSPOT_JNI_SETSTATICDOUBLEFIELD_ENTRY(env, clazz, (uintptr_t) fieldID),
2420 HOTSPOT_JNI_SETSTATICDOUBLEFIELD_RETURN())
2421
2422 //
2423 // String Operations
2424 //
2425
2426 // Unicode Interface
2427
2428 DT_RETURN_MARK_DECL(NewString, jstring
2429 , HOTSPOT_JNI_NEWSTRING_RETURN(_ret_ref));
2430
2431 JNI_ENTRY(jstring, jni_NewString(JNIEnv *env, const jchar *unicodeChars, jsize len))
2432 JNIWrapper("NewString");
2433 HOTSPOT_JNI_NEWSTRING_ENTRY(env, (uint16_t *) unicodeChars, len);
2434 jstring ret = NULL;
2435 DT_RETURN_MARK(NewString, jstring, (const jstring&)ret);
2436 oop string=java_lang_String::create_oop_from_unicode((jchar*) unicodeChars, len, CHECK_NULL);
2437 ret = (jstring) JNIHandles::make_local(env, string);
2438 return ret;
2439 JNI_END
2440
2441
2442 JNI_ENTRY_NO_PRESERVE(jsize, jni_GetStringLength(JNIEnv *env, jstring string))
2443 JNIWrapper("GetStringLength");
2444 HOTSPOT_JNI_GETSTRINGLENGTH_ENTRY(env, string);
2445 jsize ret = 0;
2446 oop s = JNIHandles::resolve_non_null(string);
2447 ret = java_lang_String::length(s);
2448 HOTSPOT_JNI_GETSTRINGLENGTH_RETURN(ret);
2449 return ret;
2450 JNI_END
2451
2452
2453 JNI_ENTRY_NO_PRESERVE(const jchar*, jni_GetStringChars(
2454 JNIEnv *env, jstring string, jboolean *isCopy))
2455 JNIWrapper("GetStringChars");
2456 HOTSPOT_JNI_GETSTRINGCHARS_ENTRY(env, string, (uintptr_t *) isCopy);
2457 jchar* buf = NULL;
2458 oop s = JNIHandles::resolve_non_null(string);
2459 typeArrayOop s_value = java_lang_String::value(s);
2460 if (s_value != NULL) {
2461 int s_len = java_lang_String::length(s, s_value);
2462 bool is_latin1 = java_lang_String::is_latin1(s);
2463 buf = NEW_C_HEAP_ARRAY_RETURN_NULL(jchar, s_len + 1, mtInternal); // add one for zero termination
2464 /* JNI Specification states return NULL on OOM */
2465 if (buf != NULL) {
2466 if (s_len > 0) {
2467 if (!is_latin1) {
2468 ArrayAccess<>::arraycopy_to_native(s_value, (size_t) typeArrayOopDesc::element_offset<jchar>(0),
2469 buf, s_len);
2470 } else {
2471 for (int i = 0; i < s_len; i++) {
2472 buf[i] = ((jchar) s_value->byte_at(i)) & 0xff;
2473 }
2474 }
2475 }
2476 buf[s_len] = 0;
2477 //%note jni_5
2478 if (isCopy != NULL) {
2479 *isCopy = JNI_TRUE;
2480 }
2481 }
2482 }
2483 HOTSPOT_JNI_GETSTRINGCHARS_RETURN(buf);
2484 return buf;
2485 JNI_END
2486
2487
2488 JNI_ENTRY_NO_PRESERVE(void, jni_ReleaseStringChars(JNIEnv *env, jstring str, const jchar *chars))
2489 JNIWrapper("ReleaseStringChars");
2490 HOTSPOT_JNI_RELEASESTRINGCHARS_ENTRY(env, str, (uint16_t *) chars);
2491 //%note jni_6
2492 if (chars != NULL) {
2493 // Since String objects are supposed to be immutable, don't copy any
2494 // new data back. A bad user will have to go after the char array.
2495 FreeHeap((void*) chars);
2496 }
2497 HOTSPOT_JNI_RELEASESTRINGCHARS_RETURN();
2498 JNI_END
2499
2500
2501 // UTF Interface
2502
2503 DT_RETURN_MARK_DECL(NewStringUTF, jstring
2504 , HOTSPOT_JNI_NEWSTRINGUTF_RETURN(_ret_ref));
2505
2506 JNI_ENTRY(jstring, jni_NewStringUTF(JNIEnv *env, const char *bytes))
2507 JNIWrapper("NewStringUTF");
2508 HOTSPOT_JNI_NEWSTRINGUTF_ENTRY(env, (char *) bytes);
2509 jstring ret;
2510 DT_RETURN_MARK(NewStringUTF, jstring, (const jstring&)ret);
2511
2512 oop result = java_lang_String::create_oop_from_str((char*) bytes, CHECK_NULL);
2513 ret = (jstring) JNIHandles::make_local(env, result);
2514 return ret;
2515 JNI_END
2516
2517
2518 JNI_ENTRY(jsize, jni_GetStringUTFLength(JNIEnv *env, jstring string))
2519 JNIWrapper("GetStringUTFLength");
2520 HOTSPOT_JNI_GETSTRINGUTFLENGTH_ENTRY(env, string);
2521 oop java_string = JNIHandles::resolve_non_null(string);
2522 jsize ret = java_lang_String::utf8_length(java_string);
2523 HOTSPOT_JNI_GETSTRINGUTFLENGTH_RETURN(ret);
2524 return ret;
2525 JNI_END
2526
2527
2528 JNI_ENTRY(const char*, jni_GetStringUTFChars(JNIEnv *env, jstring string, jboolean *isCopy))
2529 JNIWrapper("GetStringUTFChars");
2530 HOTSPOT_JNI_GETSTRINGUTFCHARS_ENTRY(env, string, (uintptr_t *) isCopy);
2531 char* result = NULL;
2532 oop java_string = JNIHandles::resolve_non_null(string);
2533 typeArrayOop s_value = java_lang_String::value(java_string);
2534 if (s_value != NULL) {
2535 size_t length = java_lang_String::utf8_length(java_string, s_value);
2536 /* JNI Specification states return NULL on OOM */
2537 result = AllocateHeap(length + 1, mtInternal, 0, AllocFailStrategy::RETURN_NULL);
2538 if (result != NULL) {
2539 java_lang_String::as_utf8_string(java_string, s_value, result, (int) length + 1);
2540 if (isCopy != NULL) {
2541 *isCopy = JNI_TRUE;
2542 }
2543 }
2544 }
2545 HOTSPOT_JNI_GETSTRINGUTFCHARS_RETURN(result);
2546 return result;
2547 JNI_END
2548
2549
2550 JNI_LEAF(void, jni_ReleaseStringUTFChars(JNIEnv *env, jstring str, const char *chars))
2551 JNIWrapper("ReleaseStringUTFChars");
2552 HOTSPOT_JNI_RELEASESTRINGUTFCHARS_ENTRY(env, str, (char *) chars);
2553 if (chars != NULL) {
2554 FreeHeap((char*) chars);
2555 }
2556 HOTSPOT_JNI_RELEASESTRINGUTFCHARS_RETURN();
2557 JNI_END
2558
2559
2560 JNI_ENTRY_NO_PRESERVE(jsize, jni_GetArrayLength(JNIEnv *env, jarray array))
2561 JNIWrapper("GetArrayLength");
2562 HOTSPOT_JNI_GETARRAYLENGTH_ENTRY(env, array);
2563 arrayOop a = arrayOop(JNIHandles::resolve_non_null(array));
2564 assert(a->is_array(), "must be array");
2565 jsize ret = a->length();
2566 HOTSPOT_JNI_GETARRAYLENGTH_RETURN(ret);
2567 return ret;
2568 JNI_END
2569
2570
2571 //
2572 // Object Array Operations
2573 //
2574
2575 DT_RETURN_MARK_DECL(NewObjectArray, jobjectArray
2576 , HOTSPOT_JNI_NEWOBJECTARRAY_RETURN(_ret_ref));
2577
2578 JNI_ENTRY(jobjectArray, jni_NewObjectArray(JNIEnv *env, jsize length, jclass elementClass, jobject initialElement))
2579 JNIWrapper("NewObjectArray");
2580 HOTSPOT_JNI_NEWOBJECTARRAY_ENTRY(env, length, elementClass, initialElement);
2581 jobjectArray ret = NULL;
2582 DT_RETURN_MARK(NewObjectArray, jobjectArray, (const jobjectArray&)ret);
2583 Klass* ek = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(elementClass));
2584 Klass* ak = ek->array_klass(CHECK_NULL);
2585 ObjArrayKlass::cast(ak)->initialize(CHECK_NULL);
2586 objArrayOop result = ObjArrayKlass::cast(ak)->allocate(length, CHECK_NULL);
2587 oop initial_value = JNIHandles::resolve(initialElement);
2588 if (initial_value != NULL) { // array already initialized with NULL
2589 for (int index = 0; index < length; index++) {
2590 result->obj_at_put(index, initial_value);
2591 }
2592 }
2593 ret = (jobjectArray) JNIHandles::make_local(env, result);
2594 return ret;
2595 JNI_END
2596
2597 DT_RETURN_MARK_DECL(GetObjectArrayElement, jobject
2598 , HOTSPOT_JNI_GETOBJECTARRAYELEMENT_RETURN(_ret_ref));
2599
2600 JNI_ENTRY(jobject, jni_GetObjectArrayElement(JNIEnv *env, jobjectArray array, jsize index))
2601 JNIWrapper("GetObjectArrayElement");
2602 HOTSPOT_JNI_GETOBJECTARRAYELEMENT_ENTRY(env, array, index);
2603 jobject ret = NULL;
2604 DT_RETURN_MARK(GetObjectArrayElement, jobject, (const jobject&)ret);
2605 objArrayOop a = objArrayOop(JNIHandles::resolve_non_null(array));
2606 if (a->is_within_bounds(index)) {
2607 ret = JNIHandles::make_local(env, a->obj_at(index));
2608 return ret;
2609 } else {
2610 ResourceMark rm(THREAD);
2611 stringStream ss;
2612 ss.print("Index %d out of bounds for length %d", index, a->length());
2613 THROW_MSG_0(vmSymbols::java_lang_ArrayIndexOutOfBoundsException(), ss.as_string());
2614 }
2615 JNI_END
2616
2617 DT_VOID_RETURN_MARK_DECL(SetObjectArrayElement
2618 , HOTSPOT_JNI_SETOBJECTARRAYELEMENT_RETURN());
2619
2620 JNI_ENTRY(void, jni_SetObjectArrayElement(JNIEnv *env, jobjectArray array, jsize index, jobject value))
2621 JNIWrapper("SetObjectArrayElement");
2622 HOTSPOT_JNI_SETOBJECTARRAYELEMENT_ENTRY(env, array, index, value);
2623 DT_VOID_RETURN_MARK(SetObjectArrayElement);
2624
2625 objArrayOop a = objArrayOop(JNIHandles::resolve_non_null(array));
2626 oop v = JNIHandles::resolve(value);
2627 if (a->is_within_bounds(index)) {
2628 if (v == NULL || v->is_a(ObjArrayKlass::cast(a->klass())->element_klass())) {
2629 a->obj_at_put(index, v);
2630 } else {
2631 ResourceMark rm(THREAD);
2632 stringStream ss;
2633 Klass *bottom_kl = ObjArrayKlass::cast(a->klass())->bottom_klass();
2634 ss.print("type mismatch: can not store %s to %s[%d]",
2635 v->klass()->external_name(),
2636 bottom_kl->is_typeArray_klass() ? type2name_tab[ArrayKlass::cast(bottom_kl)->element_type()] : bottom_kl->external_name(),
2637 index);
2638 for (int dims = ArrayKlass::cast(a->klass())->dimension(); dims > 1; --dims) {
2639 ss.print("[]");
2640 }
2641 THROW_MSG(vmSymbols::java_lang_ArrayStoreException(), ss.as_string());
2642 }
2643 } else {
2644 ResourceMark rm(THREAD);
2645 stringStream ss;
2646 ss.print("Index %d out of bounds for length %d", index, a->length());
2647 THROW_MSG(vmSymbols::java_lang_ArrayIndexOutOfBoundsException(), ss.as_string());
2648 }
2649 JNI_END
2650
2651
2652
2653 #define DEFINE_NEWSCALARARRAY(Return,Allocator,Result \
2654 ,EntryProbe,ReturnProbe) \
2655 \
2656 DT_RETURN_MARK_DECL(New##Result##Array, Return \
2657 , ReturnProbe); \
2658 \
2659 JNI_ENTRY(Return, \
2660 jni_New##Result##Array(JNIEnv *env, jsize len)) \
2661 JNIWrapper("New" XSTR(Result) "Array"); \
2662 EntryProbe; \
2663 Return ret = NULL;\
2664 DT_RETURN_MARK(New##Result##Array, Return, (const Return&)ret);\
2665 \
2666 oop obj= oopFactory::Allocator(len, CHECK_0); \
2667 ret = (Return) JNIHandles::make_local(env, obj); \
2668 return ret;\
2669 JNI_END
2670
2671 DEFINE_NEWSCALARARRAY(jbooleanArray, new_boolArray, Boolean,
2672 HOTSPOT_JNI_NEWBOOLEANARRAY_ENTRY(env, len),
2673 HOTSPOT_JNI_NEWBOOLEANARRAY_RETURN(_ret_ref))
2674 DEFINE_NEWSCALARARRAY(jbyteArray, new_byteArray, Byte,
2675 HOTSPOT_JNI_NEWBYTEARRAY_ENTRY(env, len),
2676 HOTSPOT_JNI_NEWBYTEARRAY_RETURN(_ret_ref))
2677 DEFINE_NEWSCALARARRAY(jshortArray, new_shortArray, Short,
2678 HOTSPOT_JNI_NEWSHORTARRAY_ENTRY(env, len),
2679 HOTSPOT_JNI_NEWSHORTARRAY_RETURN(_ret_ref))
2680 DEFINE_NEWSCALARARRAY(jcharArray, new_charArray, Char,
2681 HOTSPOT_JNI_NEWCHARARRAY_ENTRY(env, len),
2682 HOTSPOT_JNI_NEWCHARARRAY_RETURN(_ret_ref))
2683 DEFINE_NEWSCALARARRAY(jintArray, new_intArray, Int,
2684 HOTSPOT_JNI_NEWINTARRAY_ENTRY(env, len),
2685 HOTSPOT_JNI_NEWINTARRAY_RETURN(_ret_ref))
2686 DEFINE_NEWSCALARARRAY(jlongArray, new_longArray, Long,
2687 HOTSPOT_JNI_NEWLONGARRAY_ENTRY(env, len),
2688 HOTSPOT_JNI_NEWLONGARRAY_RETURN(_ret_ref))
2689 DEFINE_NEWSCALARARRAY(jfloatArray, new_floatArray, Float,
2690 HOTSPOT_JNI_NEWFLOATARRAY_ENTRY(env, len),
2691 HOTSPOT_JNI_NEWFLOATARRAY_RETURN(_ret_ref))
2692 DEFINE_NEWSCALARARRAY(jdoubleArray, new_doubleArray, Double,
2693 HOTSPOT_JNI_NEWDOUBLEARRAY_ENTRY(env, len),
2694 HOTSPOT_JNI_NEWDOUBLEARRAY_RETURN(_ret_ref))
2695
2696 // Return an address which will fault if the caller writes to it.
2697
2698 static char* get_bad_address() {
2699 static char* bad_address = NULL;
2700 if (bad_address == NULL) {
2701 size_t size = os::vm_allocation_granularity();
2702 bad_address = os::reserve_memory(size);
2703 if (bad_address != NULL) {
2704 os::protect_memory(bad_address, size, os::MEM_PROT_READ,
2705 /*is_committed*/false);
2706 MemTracker::record_virtual_memory_type((void*)bad_address, mtInternal);
2707 }
2708 }
2709 return bad_address;
2710 }
2711
2712
2713
2714 #define DEFINE_GETSCALARARRAYELEMENTS(ElementTag,ElementType,Result, Tag \
2715 , EntryProbe, ReturnProbe) \
2716 \
2717 JNI_ENTRY_NO_PRESERVE(ElementType*, \
2718 jni_Get##Result##ArrayElements(JNIEnv *env, ElementType##Array array, jboolean *isCopy)) \
2719 JNIWrapper("Get" XSTR(Result) "ArrayElements"); \
2720 EntryProbe; \
2721 /* allocate an chunk of memory in c land */ \
2722 typeArrayOop a = typeArrayOop(JNIHandles::resolve_non_null(array)); \
2723 ElementType* result; \
2724 int len = a->length(); \
2725 if (len == 0) { \
2726 if (isCopy != NULL) { \
2727 *isCopy = JNI_FALSE; \
2728 } \
2729 /* Empty array: legal but useless, can't return NULL. \
2730 * Return a pointer to something useless. \
2731 * Avoid asserts in typeArrayOop. */ \
2732 result = (ElementType*)get_bad_address(); \
2733 } else { \
2734 /* JNI Specification states return NULL on OOM */ \
2735 result = NEW_C_HEAP_ARRAY_RETURN_NULL(ElementType, len, mtInternal); \
2736 if (result != NULL) { \
2737 /* copy the array to the c chunk */ \
2738 ArrayAccess<>::arraycopy_to_native(a, typeArrayOopDesc::element_offset<ElementType>(0), \
2739 result, len); \
2740 if (isCopy) { \
2741 *isCopy = JNI_TRUE; \
2742 } \
2743 } \
2744 } \
2745 ReturnProbe; \
2746 return result; \
2747 JNI_END
2748
2749 DEFINE_GETSCALARARRAYELEMENTS(T_BOOLEAN, jboolean, Boolean, bool
2750 , HOTSPOT_JNI_GETBOOLEANARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy),
2751 HOTSPOT_JNI_GETBOOLEANARRAYELEMENTS_RETURN((uintptr_t*)result))
2752 DEFINE_GETSCALARARRAYELEMENTS(T_BYTE, jbyte, Byte, byte
2753 , HOTSPOT_JNI_GETBYTEARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy),
2754 HOTSPOT_JNI_GETBYTEARRAYELEMENTS_RETURN((char*)result))
2755 DEFINE_GETSCALARARRAYELEMENTS(T_SHORT, jshort, Short, short
2756 , HOTSPOT_JNI_GETSHORTARRAYELEMENTS_ENTRY(env, (uint16_t*) array, (uintptr_t *) isCopy),
2757 HOTSPOT_JNI_GETSHORTARRAYELEMENTS_RETURN((uint16_t*)result))
2758 DEFINE_GETSCALARARRAYELEMENTS(T_CHAR, jchar, Char, char
2759 , HOTSPOT_JNI_GETCHARARRAYELEMENTS_ENTRY(env, (uint16_t*) array, (uintptr_t *) isCopy),
2760 HOTSPOT_JNI_GETCHARARRAYELEMENTS_RETURN(result))
2761 DEFINE_GETSCALARARRAYELEMENTS(T_INT, jint, Int, int
2762 , HOTSPOT_JNI_GETINTARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy),
2763 HOTSPOT_JNI_GETINTARRAYELEMENTS_RETURN((uint32_t*)result))
2764 DEFINE_GETSCALARARRAYELEMENTS(T_LONG, jlong, Long, long
2765 , HOTSPOT_JNI_GETLONGARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy),
2766 HOTSPOT_JNI_GETLONGARRAYELEMENTS_RETURN(((uintptr_t*)result)))
2767 // Float and double probes don't return value because dtrace doesn't currently support it
2768 DEFINE_GETSCALARARRAYELEMENTS(T_FLOAT, jfloat, Float, float
2769 , HOTSPOT_JNI_GETFLOATARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy),
2770 HOTSPOT_JNI_GETFLOATARRAYELEMENTS_RETURN(result))
2771 DEFINE_GETSCALARARRAYELEMENTS(T_DOUBLE, jdouble, Double, double
2772 , HOTSPOT_JNI_GETDOUBLEARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy),
2773 HOTSPOT_JNI_GETDOUBLEARRAYELEMENTS_RETURN(result))
2774
2775
2776 #define DEFINE_RELEASESCALARARRAYELEMENTS(ElementTag,ElementType,Result,Tag \
2777 , EntryProbe, ReturnProbe);\
2778 \
2779 JNI_ENTRY_NO_PRESERVE(void, \
2780 jni_Release##Result##ArrayElements(JNIEnv *env, ElementType##Array array, \
2781 ElementType *buf, jint mode)) \
2782 JNIWrapper("Release" XSTR(Result) "ArrayElements"); \
2783 EntryProbe; \
2784 typeArrayOop a = typeArrayOop(JNIHandles::resolve_non_null(array)); \
2785 int len = a->length(); \
2786 if (len != 0) { /* Empty array: nothing to free or copy. */ \
2787 if ((mode == 0) || (mode == JNI_COMMIT)) { \
2788 ArrayAccess<>::arraycopy_from_native(buf, a, typeArrayOopDesc::element_offset<ElementType>(0), len); \
2789 } \
2790 if ((mode == 0) || (mode == JNI_ABORT)) { \
2791 FreeHeap(buf); \
2792 } \
2793 } \
2794 ReturnProbe; \
2795 JNI_END
2796
2797 DEFINE_RELEASESCALARARRAYELEMENTS(T_BOOLEAN, jboolean, Boolean, bool
2798 , HOTSPOT_JNI_RELEASEBOOLEANARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) buf, mode),
2799 HOTSPOT_JNI_RELEASEBOOLEANARRAYELEMENTS_RETURN())
2800 DEFINE_RELEASESCALARARRAYELEMENTS(T_BYTE, jbyte, Byte, byte
2801 , HOTSPOT_JNI_RELEASEBYTEARRAYELEMENTS_ENTRY(env, array, (char *) buf, mode),
2802 HOTSPOT_JNI_RELEASEBYTEARRAYELEMENTS_RETURN())
2803 DEFINE_RELEASESCALARARRAYELEMENTS(T_SHORT, jshort, Short, short
2804 , HOTSPOT_JNI_RELEASESHORTARRAYELEMENTS_ENTRY(env, array, (uint16_t *) buf, mode),
2805 HOTSPOT_JNI_RELEASESHORTARRAYELEMENTS_RETURN())
2806 DEFINE_RELEASESCALARARRAYELEMENTS(T_CHAR, jchar, Char, char
2807 , HOTSPOT_JNI_RELEASECHARARRAYELEMENTS_ENTRY(env, array, (uint16_t *) buf, mode),
2808 HOTSPOT_JNI_RELEASECHARARRAYELEMENTS_RETURN())
2809 DEFINE_RELEASESCALARARRAYELEMENTS(T_INT, jint, Int, int
2810 , HOTSPOT_JNI_RELEASEINTARRAYELEMENTS_ENTRY(env, array, (uint32_t *) buf, mode),
2811 HOTSPOT_JNI_RELEASEINTARRAYELEMENTS_RETURN())
2812 DEFINE_RELEASESCALARARRAYELEMENTS(T_LONG, jlong, Long, long
2813 , HOTSPOT_JNI_RELEASELONGARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) buf, mode),
2814 HOTSPOT_JNI_RELEASELONGARRAYELEMENTS_RETURN())
2815 DEFINE_RELEASESCALARARRAYELEMENTS(T_FLOAT, jfloat, Float, float
2816 , HOTSPOT_JNI_RELEASEFLOATARRAYELEMENTS_ENTRY(env, array, (float *) buf, mode),
2817 HOTSPOT_JNI_RELEASEFLOATARRAYELEMENTS_RETURN())
2818 DEFINE_RELEASESCALARARRAYELEMENTS(T_DOUBLE, jdouble, Double, double
2819 , HOTSPOT_JNI_RELEASEDOUBLEARRAYELEMENTS_ENTRY(env, array, (double *) buf, mode),
2820 HOTSPOT_JNI_RELEASEDOUBLEARRAYELEMENTS_RETURN())
2821
2822 static void check_bounds(jsize start, jsize copy_len, jsize array_len, TRAPS) {
2823 ResourceMark rm(THREAD);
2824 if (copy_len < 0) {
2825 stringStream ss;
2826 ss.print("Length %d is negative", copy_len);
2827 THROW_MSG(vmSymbols::java_lang_ArrayIndexOutOfBoundsException(), ss.as_string());
2828 } else if (start < 0 || (start > array_len - copy_len)) {
2829 stringStream ss;
2830 ss.print("Array region %d.." INT64_FORMAT " out of bounds for length %d",
2831 start, (int64_t)start+(int64_t)copy_len, array_len);
2832 THROW_MSG(vmSymbols::java_lang_ArrayIndexOutOfBoundsException(), ss.as_string());
2833 }
2834 }
2835
2836 #define DEFINE_GETSCALARARRAYREGION(ElementTag,ElementType,Result, Tag \
2837 , EntryProbe, ReturnProbe); \
2838 DT_VOID_RETURN_MARK_DECL(Get##Result##ArrayRegion \
2839 , ReturnProbe); \
2840 \
2841 JNI_ENTRY(void, \
2842 jni_Get##Result##ArrayRegion(JNIEnv *env, ElementType##Array array, jsize start, \
2843 jsize len, ElementType *buf)) \
2844 JNIWrapper("Get" XSTR(Result) "ArrayRegion"); \
2845 EntryProbe; \
2846 DT_VOID_RETURN_MARK(Get##Result##ArrayRegion); \
2847 typeArrayOop src = typeArrayOop(JNIHandles::resolve_non_null(array)); \
2848 check_bounds(start, len, src->length(), CHECK); \
2849 if (len > 0) { \
2850 ArrayAccess<>::arraycopy_to_native(src, typeArrayOopDesc::element_offset<ElementType>(start), buf, len); \
2851 } \
2852 JNI_END
2853
2854 DEFINE_GETSCALARARRAYREGION(T_BOOLEAN, jboolean,Boolean, bool
2855 , HOTSPOT_JNI_GETBOOLEANARRAYREGION_ENTRY(env, array, start, len, (uintptr_t *) buf),
2856 HOTSPOT_JNI_GETBOOLEANARRAYREGION_RETURN());
2857 DEFINE_GETSCALARARRAYREGION(T_BYTE, jbyte, Byte, byte
2858 , HOTSPOT_JNI_GETBYTEARRAYREGION_ENTRY(env, array, start, len, (char *) buf),
2859 HOTSPOT_JNI_GETBYTEARRAYREGION_RETURN());
2860 DEFINE_GETSCALARARRAYREGION(T_SHORT, jshort, Short, short
2861 , HOTSPOT_JNI_GETSHORTARRAYREGION_ENTRY(env, array, start, len, (uint16_t *) buf),
2862 HOTSPOT_JNI_GETSHORTARRAYREGION_RETURN());
2863 DEFINE_GETSCALARARRAYREGION(T_CHAR, jchar, Char, char
2864 , HOTSPOT_JNI_GETCHARARRAYREGION_ENTRY(env, array, start, len, (uint16_t*) buf),
2865 HOTSPOT_JNI_GETCHARARRAYREGION_RETURN());
2866 DEFINE_GETSCALARARRAYREGION(T_INT, jint, Int, int
2867 , HOTSPOT_JNI_GETINTARRAYREGION_ENTRY(env, array, start, len, (uint32_t*) buf),
2868 HOTSPOT_JNI_GETINTARRAYREGION_RETURN());
2869 DEFINE_GETSCALARARRAYREGION(T_LONG, jlong, Long, long
2870 , HOTSPOT_JNI_GETLONGARRAYREGION_ENTRY(env, array, start, len, (uintptr_t *) buf),
2871 HOTSPOT_JNI_GETLONGARRAYREGION_RETURN());
2872 DEFINE_GETSCALARARRAYREGION(T_FLOAT, jfloat, Float, float
2873 , HOTSPOT_JNI_GETFLOATARRAYREGION_ENTRY(env, array, start, len, (float *) buf),
2874 HOTSPOT_JNI_GETFLOATARRAYREGION_RETURN());
2875 DEFINE_GETSCALARARRAYREGION(T_DOUBLE, jdouble, Double, double
2876 , HOTSPOT_JNI_GETDOUBLEARRAYREGION_ENTRY(env, array, start, len, (double *) buf),
2877 HOTSPOT_JNI_GETDOUBLEARRAYREGION_RETURN());
2878
2879
2880 #define DEFINE_SETSCALARARRAYREGION(ElementTag,ElementType,Result, Tag \
2881 , EntryProbe, ReturnProbe); \
2882 DT_VOID_RETURN_MARK_DECL(Set##Result##ArrayRegion \
2883 ,ReturnProbe); \
2884 \
2885 JNI_ENTRY(void, \
2886 jni_Set##Result##ArrayRegion(JNIEnv *env, ElementType##Array array, jsize start, \
2887 jsize len, const ElementType *buf)) \
2888 JNIWrapper("Set" XSTR(Result) "ArrayRegion"); \
2889 EntryProbe; \
2890 DT_VOID_RETURN_MARK(Set##Result##ArrayRegion); \
2891 typeArrayOop dst = typeArrayOop(JNIHandles::resolve_non_null(array)); \
2892 check_bounds(start, len, dst->length(), CHECK); \
2893 if (len > 0) { \
2894 ArrayAccess<>::arraycopy_from_native(buf, dst, typeArrayOopDesc::element_offset<ElementType>(start), len); \
2895 } \
2896 JNI_END
2897
2898 DEFINE_SETSCALARARRAYREGION(T_BOOLEAN, jboolean, Boolean, bool
2899 , HOTSPOT_JNI_SETBOOLEANARRAYREGION_ENTRY(env, array, start, len, (uintptr_t *)buf),
2900 HOTSPOT_JNI_SETBOOLEANARRAYREGION_RETURN())
2901 DEFINE_SETSCALARARRAYREGION(T_BYTE, jbyte, Byte, byte
2902 , HOTSPOT_JNI_SETBYTEARRAYREGION_ENTRY(env, array, start, len, (char *) buf),
2903 HOTSPOT_JNI_SETBYTEARRAYREGION_RETURN())
2904 DEFINE_SETSCALARARRAYREGION(T_SHORT, jshort, Short, short
2905 , HOTSPOT_JNI_SETSHORTARRAYREGION_ENTRY(env, array, start, len, (uint16_t *) buf),
2906 HOTSPOT_JNI_SETSHORTARRAYREGION_RETURN())
2907 DEFINE_SETSCALARARRAYREGION(T_CHAR, jchar, Char, char
2908 , HOTSPOT_JNI_SETCHARARRAYREGION_ENTRY(env, array, start, len, (uint16_t *) buf),
2909 HOTSPOT_JNI_SETCHARARRAYREGION_RETURN())
2910 DEFINE_SETSCALARARRAYREGION(T_INT, jint, Int, int
2911 , HOTSPOT_JNI_SETINTARRAYREGION_ENTRY(env, array, start, len, (uint32_t *) buf),
2912 HOTSPOT_JNI_SETINTARRAYREGION_RETURN())
2913 DEFINE_SETSCALARARRAYREGION(T_LONG, jlong, Long, long
2914 , HOTSPOT_JNI_SETLONGARRAYREGION_ENTRY(env, array, start, len, (uintptr_t *) buf),
2915 HOTSPOT_JNI_SETLONGARRAYREGION_RETURN())
2916 DEFINE_SETSCALARARRAYREGION(T_FLOAT, jfloat, Float, float
2917 , HOTSPOT_JNI_SETFLOATARRAYREGION_ENTRY(env, array, start, len, (float *) buf),
2918 HOTSPOT_JNI_SETFLOATARRAYREGION_RETURN())
2919 DEFINE_SETSCALARARRAYREGION(T_DOUBLE, jdouble, Double, double
2920 , HOTSPOT_JNI_SETDOUBLEARRAYREGION_ENTRY(env, array, start, len, (double *) buf),
2921 HOTSPOT_JNI_SETDOUBLEARRAYREGION_RETURN())
2922
2923
2924 //
2925 // Interception of natives
2926 //
2927
2928 // The RegisterNatives call being attempted tried to register with a method that
2929 // is not native. Ask JVM TI what prefixes have been specified. Then check
2930 // to see if the native method is now wrapped with the prefixes. See the
2931 // SetNativeMethodPrefix(es) functions in the JVM TI Spec for details.
2932 static Method* find_prefixed_native(Klass* k, Symbol* name, Symbol* signature, TRAPS) {
2933 #if INCLUDE_JVMTI
2934 ResourceMark rm(THREAD);
2935 Method* method;
2936 int name_len = name->utf8_length();
2937 char* name_str = name->as_utf8();
2938 int prefix_count;
2939 char** prefixes = JvmtiExport::get_all_native_method_prefixes(&prefix_count);
2940 for (int i = 0; i < prefix_count; i++) {
2941 char* prefix = prefixes[i];
2942 int prefix_len = (int)strlen(prefix);
2943
2944 // try adding this prefix to the method name and see if it matches another method name
2945 int trial_len = name_len + prefix_len;
2946 char* trial_name_str = NEW_RESOURCE_ARRAY(char, trial_len + 1);
2947 strcpy(trial_name_str, prefix);
2948 strcat(trial_name_str, name_str);
2949 TempNewSymbol trial_name = SymbolTable::probe(trial_name_str, trial_len);
2950 if (trial_name == NULL) {
2951 continue; // no such symbol, so this prefix wasn't used, try the next prefix
2952 }
2953 method = k->lookup_method(trial_name, signature);
2954 if (method == NULL) {
2955 continue; // signature doesn't match, try the next prefix
2956 }
2957 if (method->is_native()) {
2958 method->set_is_prefixed_native();
2959 return method; // wahoo, we found a prefixed version of the method, return it
2960 }
2961 // found as non-native, so prefix is good, add it, probably just need more prefixes
2962 name_len = trial_len;
2963 name_str = trial_name_str;
2964 }
2965 #endif // INCLUDE_JVMTI
2966 return NULL; // not found
2967 }
2968
2969 static bool register_native(Klass* k, Symbol* name, Symbol* signature, address entry, TRAPS) {
2970 Method* method = k->lookup_method(name, signature);
2971 if (method == NULL) {
2972 ResourceMark rm;
2973 stringStream st;
2974 st.print("Method '");
2975 Method::print_external_name(&st, k, name, signature);
2976 st.print("' name or signature does not match");
2977 THROW_MSG_(vmSymbols::java_lang_NoSuchMethodError(), st.as_string(), false);
2978 }
2979 if (!method->is_native()) {
2980 // trying to register to a non-native method, see if a JVM TI agent has added prefix(es)
2981 method = find_prefixed_native(k, name, signature, THREAD);
2982 if (method == NULL) {
2983 ResourceMark rm;
2984 stringStream st;
2985 st.print("Method '");
2986 Method::print_external_name(&st, k, name, signature);
2987 st.print("' is not declared as native");
2988 THROW_MSG_(vmSymbols::java_lang_NoSuchMethodError(), st.as_string(), false);
2989 }
2990 }
2991
2992 if (entry != NULL) {
2993 method->set_native_function(entry,
2994 Method::native_bind_event_is_interesting);
2995 } else {
2996 method->clear_native_function();
2997 }
2998 if (PrintJNIResolving) {
2999 ResourceMark rm(THREAD);
3000 tty->print_cr("[Registering JNI native method %s.%s]",
3001 method->method_holder()->external_name(),
3002 method->name()->as_C_string());
3003 }
3004 return true;
3005 }
3006
3007 DT_RETURN_MARK_DECL(RegisterNatives, jint
3008 , HOTSPOT_JNI_REGISTERNATIVES_RETURN(_ret_ref));
3009
3010 JNI_ENTRY(jint, jni_RegisterNatives(JNIEnv *env, jclass clazz,
3011 const JNINativeMethod *methods,
3012 jint nMethods))
3013 JNIWrapper("RegisterNatives");
3014 HOTSPOT_JNI_REGISTERNATIVES_ENTRY(env, clazz, (void *) methods, nMethods);
3015 jint ret = 0;
3016 DT_RETURN_MARK(RegisterNatives, jint, (const jint&)ret);
3017
3018 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz));
3019
3020 for (int index = 0; index < nMethods; index++) {
3021 const char* meth_name = methods[index].name;
3022 const char* meth_sig = methods[index].signature;
3023 int meth_name_len = (int)strlen(meth_name);
3024
3025 // The class should have been loaded (we have an instance of the class
3026 // passed in) so the method and signature should already be in the symbol
3027 // table. If they're not there, the method doesn't exist.
3028 TempNewSymbol name = SymbolTable::probe(meth_name, meth_name_len);
3029 TempNewSymbol signature = SymbolTable::probe(meth_sig, (int)strlen(meth_sig));
3030
3031 if (name == NULL || signature == NULL) {
3032 ResourceMark rm;
3033 stringStream st;
3034 st.print("Method %s.%s%s not found", k->external_name(), meth_name, meth_sig);
3035 // Must return negative value on failure
3036 THROW_MSG_(vmSymbols::java_lang_NoSuchMethodError(), st.as_string(), -1);
3037 }
3038
3039 bool res = register_native(k, name, signature,
3040 (address) methods[index].fnPtr, THREAD);
3041 if (!res) {
3042 ret = -1;
3043 break;
3044 }
3045 }
3046 return ret;
3047 JNI_END
3048
3049
3050 JNI_ENTRY(jint, jni_UnregisterNatives(JNIEnv *env, jclass clazz))
3051 JNIWrapper("UnregisterNatives");
3052 HOTSPOT_JNI_UNREGISTERNATIVES_ENTRY(env, clazz);
3053 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz));
3054 //%note jni_2
3055 if (k->is_instance_klass()) {
3056 for (int index = 0; index < InstanceKlass::cast(k)->methods()->length(); index++) {
3057 Method* m = InstanceKlass::cast(k)->methods()->at(index);
3058 if (m->is_native()) {
3059 m->clear_native_function();
3060 m->set_signature_handler(NULL);
3061 }
3062 }
3063 }
3064 HOTSPOT_JNI_UNREGISTERNATIVES_RETURN(0);
3065 return 0;
3066 JNI_END
3067
3068 //
3069 // Monitor functions
3070 //
3071
3072 DT_RETURN_MARK_DECL(MonitorEnter, jint
3073 , HOTSPOT_JNI_MONITORENTER_RETURN(_ret_ref));
3074
3075 JNI_ENTRY(jint, jni_MonitorEnter(JNIEnv *env, jobject jobj))
3076 HOTSPOT_JNI_MONITORENTER_ENTRY(env, jobj);
3077 jint ret = JNI_ERR;
3078 DT_RETURN_MARK(MonitorEnter, jint, (const jint&)ret);
3079
3080 // If the object is null, we can't do anything with it
3081 if (jobj == NULL) {
3082 THROW_(vmSymbols::java_lang_NullPointerException(), JNI_ERR);
3083 }
3084
3085 Handle obj(thread, JNIHandles::resolve_non_null(jobj));
3086 ObjectSynchronizer::jni_enter(obj, CHECK_(JNI_ERR));
3087 ret = JNI_OK;
3088 return ret;
3089 JNI_END
3090
3091 DT_RETURN_MARK_DECL(MonitorExit, jint
3092 , HOTSPOT_JNI_MONITOREXIT_RETURN(_ret_ref));
3093
3094 JNI_ENTRY(jint, jni_MonitorExit(JNIEnv *env, jobject jobj))
3095 HOTSPOT_JNI_MONITOREXIT_ENTRY(env, jobj);
3096 jint ret = JNI_ERR;
3097 DT_RETURN_MARK(MonitorExit, jint, (const jint&)ret);
3098
3099 // Don't do anything with a null object
3100 if (jobj == NULL) {
3101 THROW_(vmSymbols::java_lang_NullPointerException(), JNI_ERR);
3102 }
3103
3104 Handle obj(THREAD, JNIHandles::resolve_non_null(jobj));
3105 ObjectSynchronizer::jni_exit(obj(), CHECK_(JNI_ERR));
3106
3107 ret = JNI_OK;
3108 return ret;
3109 JNI_END
3110
3111 //
3112 // Extensions
3113 //
3114
3115 DT_VOID_RETURN_MARK_DECL(GetStringRegion
3116 , HOTSPOT_JNI_GETSTRINGREGION_RETURN());
3117
3118 JNI_ENTRY(void, jni_GetStringRegion(JNIEnv *env, jstring string, jsize start, jsize len, jchar *buf))
3119 JNIWrapper("GetStringRegion");
3120 HOTSPOT_JNI_GETSTRINGREGION_ENTRY(env, string, start, len, buf);
3121 DT_VOID_RETURN_MARK(GetStringRegion);
3122 oop s = JNIHandles::resolve_non_null(string);
3123 typeArrayOop s_value = java_lang_String::value(s);
3124 int s_len = java_lang_String::length(s, s_value);
3125 if (start < 0 || len < 0 || start > s_len - len) {
3126 THROW(vmSymbols::java_lang_StringIndexOutOfBoundsException());
3127 } else {
3128 if (len > 0) {
3129 bool is_latin1 = java_lang_String::is_latin1(s);
3130 if (!is_latin1) {
3131 ArrayAccess<>::arraycopy_to_native(s_value, typeArrayOopDesc::element_offset<jchar>(start),
3132 buf, len);
3133 } else {
3134 for (int i = 0; i < len; i++) {
3135 buf[i] = ((jchar) s_value->byte_at(i + start)) & 0xff;
3136 }
3137 }
3138 }
3139 }
3140 JNI_END
3141
3142 DT_VOID_RETURN_MARK_DECL(GetStringUTFRegion
3143 , HOTSPOT_JNI_GETSTRINGUTFREGION_RETURN());
3144
3145 JNI_ENTRY(void, jni_GetStringUTFRegion(JNIEnv *env, jstring string, jsize start, jsize len, char *buf))
3146 JNIWrapper("GetStringUTFRegion");
3147 HOTSPOT_JNI_GETSTRINGUTFREGION_ENTRY(env, string, start, len, buf);
3148 DT_VOID_RETURN_MARK(GetStringUTFRegion);
3149 oop s = JNIHandles::resolve_non_null(string);
3150 typeArrayOop s_value = java_lang_String::value(s);
3151 int s_len = java_lang_String::length(s, s_value);
3152 if (start < 0 || len < 0 || start > s_len - len) {
3153 THROW(vmSymbols::java_lang_StringIndexOutOfBoundsException());
3154 } else {
3155 //%note jni_7
3156 if (len > 0) {
3157 // Assume the buffer is large enough as the JNI spec. does not require user error checking
3158 java_lang_String::as_utf8_string(s, s_value, start, len, buf, INT_MAX);
3159 // as_utf8_string null-terminates the result string
3160 } else {
3161 // JDK null-terminates the buffer even in len is zero
3162 if (buf != NULL) {
3163 buf[0] = 0;
3164 }
3165 }
3166 }
3167 JNI_END
3168
3169 static oop lock_gc_or_pin_object(JavaThread* thread, jobject obj) {
3170 if (Universe::heap()->supports_object_pinning()) {
3171 const oop o = JNIHandles::resolve_non_null(obj);
3172 return Universe::heap()->pin_object(thread, o);
3173 } else {
3174 GCLocker::lock_critical(thread);
3175 return JNIHandles::resolve_non_null(obj);
3176 }
3177 }
3178
3179 static void unlock_gc_or_unpin_object(JavaThread* thread, jobject obj) {
3180 if (Universe::heap()->supports_object_pinning()) {
3181 const oop o = JNIHandles::resolve_non_null(obj);
3182 return Universe::heap()->unpin_object(thread, o);
3183 } else {
3184 GCLocker::unlock_critical(thread);
3185 }
3186 }
3187
3188 JNI_ENTRY(void*, jni_GetPrimitiveArrayCritical(JNIEnv *env, jarray array, jboolean *isCopy))
3189 JNIWrapper("GetPrimitiveArrayCritical");
3190 HOTSPOT_JNI_GETPRIMITIVEARRAYCRITICAL_ENTRY(env, array, (uintptr_t *) isCopy);
3191 if (isCopy != NULL) {
3192 *isCopy = JNI_FALSE;
3193 }
3194 oop a = lock_gc_or_pin_object(thread, array);
3195 assert(a->is_array(), "just checking");
3196 BasicType type;
3197 if (a->is_objArray()) {
3198 type = T_OBJECT;
3199 } else {
3200 type = TypeArrayKlass::cast(a->klass())->element_type();
3201 }
3202 void* ret = arrayOop(a)->base(type);
3203 HOTSPOT_JNI_GETPRIMITIVEARRAYCRITICAL_RETURN(ret);
3204 return ret;
3205 JNI_END
3206
3207
3208 JNI_ENTRY(void, jni_ReleasePrimitiveArrayCritical(JNIEnv *env, jarray array, void *carray, jint mode))
3209 JNIWrapper("ReleasePrimitiveArrayCritical");
3210 HOTSPOT_JNI_RELEASEPRIMITIVEARRAYCRITICAL_ENTRY(env, array, carray, mode);
3211 unlock_gc_or_unpin_object(thread, array);
3212 HOTSPOT_JNI_RELEASEPRIMITIVEARRAYCRITICAL_RETURN();
3213 JNI_END
3214
3215
3216 JNI_ENTRY(const jchar*, jni_GetStringCritical(JNIEnv *env, jstring string, jboolean *isCopy))
3217 JNIWrapper("GetStringCritical");
3218 HOTSPOT_JNI_GETSTRINGCRITICAL_ENTRY(env, string, (uintptr_t *) isCopy);
3219 oop s = lock_gc_or_pin_object(thread, string);
3220 typeArrayOop s_value = java_lang_String::value(s);
3221 bool is_latin1 = java_lang_String::is_latin1(s);
3222 if (isCopy != NULL) {
3223 *isCopy = is_latin1 ? JNI_TRUE : JNI_FALSE;
3224 }
3225 jchar* ret;
3226 if (!is_latin1) {
3227 ret = (jchar*) s_value->base(T_CHAR);
3228 } else {
3229 // Inflate latin1 encoded string to UTF16
3230 int s_len = java_lang_String::length(s, s_value);
3231 ret = NEW_C_HEAP_ARRAY_RETURN_NULL(jchar, s_len + 1, mtInternal); // add one for zero termination
3232 /* JNI Specification states return NULL on OOM */
3233 if (ret != NULL) {
3234 for (int i = 0; i < s_len; i++) {
3235 ret[i] = ((jchar) s_value->byte_at(i)) & 0xff;
3236 }
3237 ret[s_len] = 0;
3238 }
3239 }
3240 HOTSPOT_JNI_GETSTRINGCRITICAL_RETURN((uint16_t *) ret);
3241 return ret;
3242 JNI_END
3243
3244
3245 JNI_ENTRY(void, jni_ReleaseStringCritical(JNIEnv *env, jstring str, const jchar *chars))
3246 JNIWrapper("ReleaseStringCritical");
3247 HOTSPOT_JNI_RELEASESTRINGCRITICAL_ENTRY(env, str, (uint16_t *) chars);
3248 // The str and chars arguments are ignored for UTF16 strings
3249 oop s = JNIHandles::resolve_non_null(str);
3250 bool is_latin1 = java_lang_String::is_latin1(s);
3251 if (is_latin1) {
3252 // For latin1 string, free jchar array allocated by earlier call to GetStringCritical.
3253 // This assumes that ReleaseStringCritical bookends GetStringCritical.
3254 FREE_C_HEAP_ARRAY(jchar, chars);
3255 }
3256 unlock_gc_or_unpin_object(thread, str);
3257 HOTSPOT_JNI_RELEASESTRINGCRITICAL_RETURN();
3258 JNI_END
3259
3260
3261 JNI_ENTRY(jweak, jni_NewWeakGlobalRef(JNIEnv *env, jobject ref))
3262 JNIWrapper("jni_NewWeakGlobalRef");
3263 HOTSPOT_JNI_NEWWEAKGLOBALREF_ENTRY(env, ref);
3264 Handle ref_handle(thread, JNIHandles::resolve(ref));
3265 jweak ret = JNIHandles::make_weak_global(ref_handle);
3266 HOTSPOT_JNI_NEWWEAKGLOBALREF_RETURN(ret);
3267 return ret;
3268 JNI_END
3269
3270 // Must be JNI_ENTRY (with HandleMark)
3271 JNI_ENTRY(void, jni_DeleteWeakGlobalRef(JNIEnv *env, jweak ref))
3272 JNIWrapper("jni_DeleteWeakGlobalRef");
3273 HOTSPOT_JNI_DELETEWEAKGLOBALREF_ENTRY(env, ref);
3274 JNIHandles::destroy_weak_global(ref);
3275 HOTSPOT_JNI_DELETEWEAKGLOBALREF_RETURN();
3276 JNI_END
3277
3278
3279 JNI_ENTRY_NO_PRESERVE(jboolean, jni_ExceptionCheck(JNIEnv *env))
3280 JNIWrapper("jni_ExceptionCheck");
3281 HOTSPOT_JNI_EXCEPTIONCHECK_ENTRY(env);
3282 jni_check_async_exceptions(thread);
3283 jboolean ret = (thread->has_pending_exception()) ? JNI_TRUE : JNI_FALSE;
3284 HOTSPOT_JNI_EXCEPTIONCHECK_RETURN(ret);
3285 return ret;
3286 JNI_END
3287
3288
3289 // Initialization state for three routines below relating to
3290 // java.nio.DirectBuffers
3291 static int directBufferSupportInitializeStarted = 0;
3292 static volatile int directBufferSupportInitializeEnded = 0;
3293 static volatile int directBufferSupportInitializeFailed = 0;
3294 static jclass bufferClass = NULL;
3295 static jclass directBufferClass = NULL;
3296 static jclass directByteBufferClass = NULL;
3297 static jmethodID directByteBufferConstructor = NULL;
3298 static jfieldID directBufferAddressField = NULL;
3299 static jfieldID bufferCapacityField = NULL;
3300
3301 static jclass lookupOne(JNIEnv* env, const char* name, TRAPS) {
3302 Handle loader; // null (bootstrap) loader
3303 Handle protection_domain; // null protection domain
3304
3305 TempNewSymbol sym = SymbolTable::new_symbol(name);
3306 jclass result = find_class_from_class_loader(env, sym, true, true, loader, protection_domain, true, CHECK_NULL);
3307
3308 if (log_is_enabled(Debug, class, resolve) && result != NULL) {
3309 trace_class_resolution(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(result)));
3310 }
3311 return result;
3312 }
3313
3314 // These lookups are done with the NULL (bootstrap) ClassLoader to
3315 // circumvent any security checks that would be done by jni_FindClass.
3316 JNI_ENTRY(bool, lookupDirectBufferClasses(JNIEnv* env))
3317 {
3318 if ((bufferClass = lookupOne(env, "java/nio/Buffer", thread)) == NULL) { return false; }
3319 if ((directBufferClass = lookupOne(env, "sun/nio/ch/DirectBuffer", thread)) == NULL) { return false; }
3320 if ((directByteBufferClass = lookupOne(env, "java/nio/DirectByteBuffer", thread)) == NULL) { return false; }
3321 return true;
3322 }
3323 JNI_END
3324
3325
3326 static bool initializeDirectBufferSupport(JNIEnv* env, JavaThread* thread) {
3327 if (directBufferSupportInitializeFailed) {
3328 return false;
3329 }
3330
3331 if (Atomic::cmpxchg(1, &directBufferSupportInitializeStarted, 0) == 0) {
3332 if (!lookupDirectBufferClasses(env)) {
3333 directBufferSupportInitializeFailed = 1;
3334 return false;
3335 }
3336
3337 // Make global references for these
3338 bufferClass = (jclass) env->NewGlobalRef(bufferClass);
3339 directBufferClass = (jclass) env->NewGlobalRef(directBufferClass);
3340 directByteBufferClass = (jclass) env->NewGlobalRef(directByteBufferClass);
3341
3342 // Get needed field and method IDs
3343 directByteBufferConstructor = env->GetMethodID(directByteBufferClass, "<init>", "(JI)V");
3344 if (env->ExceptionCheck()) {
3345 env->ExceptionClear();
3346 directBufferSupportInitializeFailed = 1;
3347 return false;
3348 }
3349 directBufferAddressField = env->GetFieldID(bufferClass, "address", "J");
3350 if (env->ExceptionCheck()) {
3351 env->ExceptionClear();
3352 directBufferSupportInitializeFailed = 1;
3353 return false;
3354 }
3355 bufferCapacityField = env->GetFieldID(bufferClass, "capacity", "I");
3356 if (env->ExceptionCheck()) {
3357 env->ExceptionClear();
3358 directBufferSupportInitializeFailed = 1;
3359 return false;
3360 }
3361
3362 if ((directByteBufferConstructor == NULL) ||
3363 (directBufferAddressField == NULL) ||
3364 (bufferCapacityField == NULL)) {
3365 directBufferSupportInitializeFailed = 1;
3366 return false;
3367 }
3368
3369 directBufferSupportInitializeEnded = 1;
3370 } else {
3371 while (!directBufferSupportInitializeEnded && !directBufferSupportInitializeFailed) {
3372 os::naked_yield();
3373 }
3374 }
3375
3376 return !directBufferSupportInitializeFailed;
3377 }
3378
3379 extern "C" jobject JNICALL jni_NewDirectByteBuffer(JNIEnv *env, void* address, jlong capacity)
3380 {
3381 // thread_from_jni_environment() will block if VM is gone.
3382 JavaThread* thread = JavaThread::thread_from_jni_environment(env);
3383
3384 JNIWrapper("jni_NewDirectByteBuffer");
3385 HOTSPOT_JNI_NEWDIRECTBYTEBUFFER_ENTRY(env, address, capacity);
3386
3387 if (!directBufferSupportInitializeEnded) {
3388 if (!initializeDirectBufferSupport(env, thread)) {
3389 HOTSPOT_JNI_NEWDIRECTBYTEBUFFER_RETURN(NULL);
3390 return NULL;
3391 }
3392 }
3393
3394 // Being paranoid about accidental sign extension on address
3395 jlong addr = (jlong) ((uintptr_t) address);
3396 // NOTE that package-private DirectByteBuffer constructor currently
3397 // takes int capacity
3398 jint cap = (jint) capacity;
3399 jobject ret = env->NewObject(directByteBufferClass, directByteBufferConstructor, addr, cap);
3400 HOTSPOT_JNI_NEWDIRECTBYTEBUFFER_RETURN(ret);
3401 return ret;
3402 }
3403
3404 DT_RETURN_MARK_DECL(GetDirectBufferAddress, void*
3405 , HOTSPOT_JNI_GETDIRECTBUFFERADDRESS_RETURN((void*) _ret_ref));
3406
3407 extern "C" void* JNICALL jni_GetDirectBufferAddress(JNIEnv *env, jobject buf)
3408 {
3409 // thread_from_jni_environment() will block if VM is gone.
3410 JavaThread* thread = JavaThread::thread_from_jni_environment(env);
3411
3412 JNIWrapper("jni_GetDirectBufferAddress");
3413 HOTSPOT_JNI_GETDIRECTBUFFERADDRESS_ENTRY(env, buf);
3414 void* ret = NULL;
3415 DT_RETURN_MARK(GetDirectBufferAddress, void*, (const void*&)ret);
3416
3417 if (!directBufferSupportInitializeEnded) {
3418 if (!initializeDirectBufferSupport(env, thread)) {
3419 return 0;
3420 }
3421 }
3422
3423 if ((buf != NULL) && (!env->IsInstanceOf(buf, directBufferClass))) {
3424 return 0;
3425 }
3426
3427 ret = (void*)(intptr_t)env->GetLongField(buf, directBufferAddressField);
3428 return ret;
3429 }
3430
3431 DT_RETURN_MARK_DECL(GetDirectBufferCapacity, jlong
3432 , HOTSPOT_JNI_GETDIRECTBUFFERCAPACITY_RETURN(_ret_ref));
3433
3434 extern "C" jlong JNICALL jni_GetDirectBufferCapacity(JNIEnv *env, jobject buf)
3435 {
3436 // thread_from_jni_environment() will block if VM is gone.
3437 JavaThread* thread = JavaThread::thread_from_jni_environment(env);
3438
3439 JNIWrapper("jni_GetDirectBufferCapacity");
3440 HOTSPOT_JNI_GETDIRECTBUFFERCAPACITY_ENTRY(env, buf);
3441 jlong ret = -1;
3442 DT_RETURN_MARK(GetDirectBufferCapacity, jlong, (const jlong&)ret);
3443
3444 if (!directBufferSupportInitializeEnded) {
3445 if (!initializeDirectBufferSupport(env, thread)) {
3446 ret = 0;
3447 return ret;
3448 }
3449 }
3450
3451 if (buf == NULL) {
3452 return -1;
3453 }
3454
3455 if (!env->IsInstanceOf(buf, directBufferClass)) {
3456 return -1;
3457 }
3458
3459 // NOTE that capacity is currently an int in the implementation
3460 ret = env->GetIntField(buf, bufferCapacityField);
3461 return ret;
3462 }
3463
3464
3465 JNI_LEAF(jint, jni_GetVersion(JNIEnv *env))
3466 JNIWrapper("GetVersion");
3467 HOTSPOT_JNI_GETVERSION_ENTRY(env);
3468 HOTSPOT_JNI_GETVERSION_RETURN(CurrentVersion);
3469 return CurrentVersion;
3470 JNI_END
3471
3472 extern struct JavaVM_ main_vm;
3473
3474 JNI_LEAF(jint, jni_GetJavaVM(JNIEnv *env, JavaVM **vm))
3475 JNIWrapper("jni_GetJavaVM");
3476 HOTSPOT_JNI_GETJAVAVM_ENTRY(env, (void **) vm);
3477 *vm = (JavaVM *)(&main_vm);
3478 HOTSPOT_JNI_GETJAVAVM_RETURN(JNI_OK);
3479 return JNI_OK;
3480 JNI_END
3481
3482
3483 JNI_ENTRY(jobject, jni_GetModule(JNIEnv* env, jclass clazz))
3484 JNIWrapper("GetModule");
3485 return Modules::get_module(clazz, THREAD);
3486 JNI_END
3487
3488
3489 // Structure containing all jni functions
3490 struct JNINativeInterface_ jni_NativeInterface = {
3491 NULL,
3492 NULL,
3493 NULL,
3494
3495 NULL,
3496
3497 jni_GetVersion,
3498
3499 jni_DefineClass,
3500 jni_FindClass,
3501
3502 jni_FromReflectedMethod,
3503 jni_FromReflectedField,
3504
3505 jni_ToReflectedMethod,
3506
3507 jni_GetSuperclass,
3508 jni_IsAssignableFrom,
3509
3510 jni_ToReflectedField,
3511
3512 jni_Throw,
3513 jni_ThrowNew,
3514 jni_ExceptionOccurred,
3515 jni_ExceptionDescribe,
3516 jni_ExceptionClear,
3517 jni_FatalError,
3518
3519 jni_PushLocalFrame,
3520 jni_PopLocalFrame,
3521
3522 jni_NewGlobalRef,
3523 jni_DeleteGlobalRef,
3524 jni_DeleteLocalRef,
3525 jni_IsSameObject,
3526
3527 jni_NewLocalRef,
3528 jni_EnsureLocalCapacity,
3529
3530 jni_AllocObject,
3531 jni_NewObject,
3532 jni_NewObjectV,
3533 jni_NewObjectA,
3534
3535 jni_GetObjectClass,
3536 jni_IsInstanceOf,
3537
3538 jni_GetMethodID,
3539
3540 jni_CallObjectMethod,
3541 jni_CallObjectMethodV,
3542 jni_CallObjectMethodA,
3543 jni_CallBooleanMethod,
3544 jni_CallBooleanMethodV,
3545 jni_CallBooleanMethodA,
3546 jni_CallByteMethod,
3547 jni_CallByteMethodV,
3548 jni_CallByteMethodA,
3549 jni_CallCharMethod,
3550 jni_CallCharMethodV,
3551 jni_CallCharMethodA,
3552 jni_CallShortMethod,
3553 jni_CallShortMethodV,
3554 jni_CallShortMethodA,
3555 jni_CallIntMethod,
3556 jni_CallIntMethodV,
3557 jni_CallIntMethodA,
3558 jni_CallLongMethod,
3559 jni_CallLongMethodV,
3560 jni_CallLongMethodA,
3561 jni_CallFloatMethod,
3562 jni_CallFloatMethodV,
3563 jni_CallFloatMethodA,
3564 jni_CallDoubleMethod,
3565 jni_CallDoubleMethodV,
3566 jni_CallDoubleMethodA,
3567 jni_CallVoidMethod,
3568 jni_CallVoidMethodV,
3569 jni_CallVoidMethodA,
3570
3571 jni_CallNonvirtualObjectMethod,
3572 jni_CallNonvirtualObjectMethodV,
3573 jni_CallNonvirtualObjectMethodA,
3574 jni_CallNonvirtualBooleanMethod,
3575 jni_CallNonvirtualBooleanMethodV,
3576 jni_CallNonvirtualBooleanMethodA,
3577 jni_CallNonvirtualByteMethod,
3578 jni_CallNonvirtualByteMethodV,
3579 jni_CallNonvirtualByteMethodA,
3580 jni_CallNonvirtualCharMethod,
3581 jni_CallNonvirtualCharMethodV,
3582 jni_CallNonvirtualCharMethodA,
3583 jni_CallNonvirtualShortMethod,
3584 jni_CallNonvirtualShortMethodV,
3585 jni_CallNonvirtualShortMethodA,
3586 jni_CallNonvirtualIntMethod,
3587 jni_CallNonvirtualIntMethodV,
3588 jni_CallNonvirtualIntMethodA,
3589 jni_CallNonvirtualLongMethod,
3590 jni_CallNonvirtualLongMethodV,
3591 jni_CallNonvirtualLongMethodA,
3592 jni_CallNonvirtualFloatMethod,
3593 jni_CallNonvirtualFloatMethodV,
3594 jni_CallNonvirtualFloatMethodA,
3595 jni_CallNonvirtualDoubleMethod,
3596 jni_CallNonvirtualDoubleMethodV,
3597 jni_CallNonvirtualDoubleMethodA,
3598 jni_CallNonvirtualVoidMethod,
3599 jni_CallNonvirtualVoidMethodV,
3600 jni_CallNonvirtualVoidMethodA,
3601
3602 jni_GetFieldID,
3603
3604 jni_GetObjectField,
3605 jni_GetBooleanField,
3606 jni_GetByteField,
3607 jni_GetCharField,
3608 jni_GetShortField,
3609 jni_GetIntField,
3610 jni_GetLongField,
3611 jni_GetFloatField,
3612 jni_GetDoubleField,
3613
3614 jni_SetObjectField,
3615 jni_SetBooleanField,
3616 jni_SetByteField,
3617 jni_SetCharField,
3618 jni_SetShortField,
3619 jni_SetIntField,
3620 jni_SetLongField,
3621 jni_SetFloatField,
3622 jni_SetDoubleField,
3623
3624 jni_GetStaticMethodID,
3625
3626 jni_CallStaticObjectMethod,
3627 jni_CallStaticObjectMethodV,
3628 jni_CallStaticObjectMethodA,
3629 jni_CallStaticBooleanMethod,
3630 jni_CallStaticBooleanMethodV,
3631 jni_CallStaticBooleanMethodA,
3632 jni_CallStaticByteMethod,
3633 jni_CallStaticByteMethodV,
3634 jni_CallStaticByteMethodA,
3635 jni_CallStaticCharMethod,
3636 jni_CallStaticCharMethodV,
3637 jni_CallStaticCharMethodA,
3638 jni_CallStaticShortMethod,
3639 jni_CallStaticShortMethodV,
3640 jni_CallStaticShortMethodA,
3641 jni_CallStaticIntMethod,
3642 jni_CallStaticIntMethodV,
3643 jni_CallStaticIntMethodA,
3644 jni_CallStaticLongMethod,
3645 jni_CallStaticLongMethodV,
3646 jni_CallStaticLongMethodA,
3647 jni_CallStaticFloatMethod,
3648 jni_CallStaticFloatMethodV,
3649 jni_CallStaticFloatMethodA,
3650 jni_CallStaticDoubleMethod,
3651 jni_CallStaticDoubleMethodV,
3652 jni_CallStaticDoubleMethodA,
3653 jni_CallStaticVoidMethod,
3654 jni_CallStaticVoidMethodV,
3655 jni_CallStaticVoidMethodA,
3656
3657 jni_GetStaticFieldID,
3658
3659 jni_GetStaticObjectField,
3660 jni_GetStaticBooleanField,
3661 jni_GetStaticByteField,
3662 jni_GetStaticCharField,
3663 jni_GetStaticShortField,
3664 jni_GetStaticIntField,
3665 jni_GetStaticLongField,
3666 jni_GetStaticFloatField,
3667 jni_GetStaticDoubleField,
3668
3669 jni_SetStaticObjectField,
3670 jni_SetStaticBooleanField,
3671 jni_SetStaticByteField,
3672 jni_SetStaticCharField,
3673 jni_SetStaticShortField,
3674 jni_SetStaticIntField,
3675 jni_SetStaticLongField,
3676 jni_SetStaticFloatField,
3677 jni_SetStaticDoubleField,
3678
3679 jni_NewString,
3680 jni_GetStringLength,
3681 jni_GetStringChars,
3682 jni_ReleaseStringChars,
3683
3684 jni_NewStringUTF,
3685 jni_GetStringUTFLength,
3686 jni_GetStringUTFChars,
3687 jni_ReleaseStringUTFChars,
3688
3689 jni_GetArrayLength,
3690
3691 jni_NewObjectArray,
3692 jni_GetObjectArrayElement,
3693 jni_SetObjectArrayElement,
3694
3695 jni_NewBooleanArray,
3696 jni_NewByteArray,
3697 jni_NewCharArray,
3698 jni_NewShortArray,
3699 jni_NewIntArray,
3700 jni_NewLongArray,
3701 jni_NewFloatArray,
3702 jni_NewDoubleArray,
3703
3704 jni_GetBooleanArrayElements,
3705 jni_GetByteArrayElements,
3706 jni_GetCharArrayElements,
3707 jni_GetShortArrayElements,
3708 jni_GetIntArrayElements,
3709 jni_GetLongArrayElements,
3710 jni_GetFloatArrayElements,
3711 jni_GetDoubleArrayElements,
3712
3713 jni_ReleaseBooleanArrayElements,
3714 jni_ReleaseByteArrayElements,
3715 jni_ReleaseCharArrayElements,
3716 jni_ReleaseShortArrayElements,
3717 jni_ReleaseIntArrayElements,
3718 jni_ReleaseLongArrayElements,
3719 jni_ReleaseFloatArrayElements,
3720 jni_ReleaseDoubleArrayElements,
3721
3722 jni_GetBooleanArrayRegion,
3723 jni_GetByteArrayRegion,
3724 jni_GetCharArrayRegion,
3725 jni_GetShortArrayRegion,
3726 jni_GetIntArrayRegion,
3727 jni_GetLongArrayRegion,
3728 jni_GetFloatArrayRegion,
3729 jni_GetDoubleArrayRegion,
3730
3731 jni_SetBooleanArrayRegion,
3732 jni_SetByteArrayRegion,
3733 jni_SetCharArrayRegion,
3734 jni_SetShortArrayRegion,
3735 jni_SetIntArrayRegion,
3736 jni_SetLongArrayRegion,
3737 jni_SetFloatArrayRegion,
3738 jni_SetDoubleArrayRegion,
3739
3740 jni_RegisterNatives,
3741 jni_UnregisterNatives,
3742
3743 jni_MonitorEnter,
3744 jni_MonitorExit,
3745
3746 jni_GetJavaVM,
3747
3748 jni_GetStringRegion,
3749 jni_GetStringUTFRegion,
3750
3751 jni_GetPrimitiveArrayCritical,
3752 jni_ReleasePrimitiveArrayCritical,
3753
3754 jni_GetStringCritical,
3755 jni_ReleaseStringCritical,
3756
3757 jni_NewWeakGlobalRef,
3758 jni_DeleteWeakGlobalRef,
3759
3760 jni_ExceptionCheck,
3761
3762 jni_NewDirectByteBuffer,
3763 jni_GetDirectBufferAddress,
3764 jni_GetDirectBufferCapacity,
3765
3766 // New 1_6 features
3767
3768 jni_GetObjectRefType,
3769
3770 // Module features
3771
3772 jni_GetModule
3773 };
3774
3775
3776 // For jvmti use to modify jni function table.
3777 // Java threads in native contiues to run until it is transitioned
3778 // to VM at safepoint. Before the transition or before it is blocked
3779 // for safepoint it may access jni function table. VM could crash if
3780 // any java thread access the jni function table in the middle of memcpy.
3781 // To avoid this each function pointers are copied automically.
3782 void copy_jni_function_table(const struct JNINativeInterface_ *new_jni_NativeInterface) {
3783 assert(SafepointSynchronize::is_at_safepoint(), "must be at safepoint");
3784 intptr_t *a = (intptr_t *) jni_functions();
3785 intptr_t *b = (intptr_t *) new_jni_NativeInterface;
3786 for (uint i=0; i < sizeof(struct JNINativeInterface_)/sizeof(void *); i++) {
3787 Atomic::store(*b++, a++);
3788 }
3789 }
3790
3791 void quicken_jni_functions() {
3792 // Replace Get<Primitive>Field with fast versions
3793 if (UseFastJNIAccessors && !VerifyJNIFields && !CountJNICalls && !CheckJNICalls) {
3794 address func;
3795 func = JNI_FastGetField::generate_fast_get_boolean_field();
3796 if (func != (address)-1) {
3797 jni_NativeInterface.GetBooleanField = (GetBooleanField_t)func;
3798 }
3799 func = JNI_FastGetField::generate_fast_get_byte_field();
3800 if (func != (address)-1) {
3801 jni_NativeInterface.GetByteField = (GetByteField_t)func;
3802 }
3803 func = JNI_FastGetField::generate_fast_get_char_field();
3804 if (func != (address)-1) {
3805 jni_NativeInterface.GetCharField = (GetCharField_t)func;
3806 }
3807 func = JNI_FastGetField::generate_fast_get_short_field();
3808 if (func != (address)-1) {
3809 jni_NativeInterface.GetShortField = (GetShortField_t)func;
3810 }
3811 func = JNI_FastGetField::generate_fast_get_int_field();
3812 if (func != (address)-1) {
3813 jni_NativeInterface.GetIntField = (GetIntField_t)func;
3814 }
3815 func = JNI_FastGetField::generate_fast_get_long_field();
3816 if (func != (address)-1) {
3817 jni_NativeInterface.GetLongField = (GetLongField_t)func;
3818 }
3819 func = JNI_FastGetField::generate_fast_get_float_field();
3820 if (func != (address)-1) {
3821 jni_NativeInterface.GetFloatField = (GetFloatField_t)func;
3822 }
3823 func = JNI_FastGetField::generate_fast_get_double_field();
3824 if (func != (address)-1) {
3825 jni_NativeInterface.GetDoubleField = (GetDoubleField_t)func;
3826 }
3827 }
3828 }
3829
3830 // Returns the function structure
3831 struct JNINativeInterface_* jni_functions() {
3832 #if INCLUDE_JNI_CHECK
3833 if (CheckJNICalls) return jni_functions_check();
3834 #endif // INCLUDE_JNI_CHECK
3835 return &jni_NativeInterface;
3836 }
3837
3838 // Returns the function structure
3839 struct JNINativeInterface_* jni_functions_nocheck() {
3840 return &jni_NativeInterface;
3841 }
3842
3843 static void post_thread_start_event(const JavaThread* jt) {
3844 assert(jt != NULL, "invariant");
3845 EventThreadStart event;
3846 if (event.should_commit()) {
3847 event.set_thread(JFR_THREAD_ID(jt));
3848 event.commit();
3849 }
3850 }
3851
3852 // Invocation API
3853
3854
3855 // Forward declaration
3856 extern const struct JNIInvokeInterface_ jni_InvokeInterface;
3857
3858 // Global invocation API vars
3859 volatile int vm_created = 0;
3860 // Indicate whether it is safe to recreate VM
3861 volatile int safe_to_recreate_vm = 1;
3862 struct JavaVM_ main_vm = {&jni_InvokeInterface};
3863
3864
3865 #define JAVASTACKSIZE (400 * 1024) /* Default size of a thread java stack */
3866 enum { VERIFY_NONE, VERIFY_REMOTE, VERIFY_ALL };
3867
3868 DT_RETURN_MARK_DECL(GetDefaultJavaVMInitArgs, jint
3869 , HOTSPOT_JNI_GETDEFAULTJAVAVMINITARGS_RETURN(_ret_ref));
3870
3871 _JNI_IMPORT_OR_EXPORT_ jint JNICALL JNI_GetDefaultJavaVMInitArgs(void *args_) {
3872 HOTSPOT_JNI_GETDEFAULTJAVAVMINITARGS_ENTRY(args_);
3873 JDK1_1InitArgs *args = (JDK1_1InitArgs *)args_;
3874 jint ret = JNI_ERR;
3875 DT_RETURN_MARK(GetDefaultJavaVMInitArgs, jint, (const jint&)ret);
3876
3877 if (Threads::is_supported_jni_version(args->version)) {
3878 ret = JNI_OK;
3879 }
3880 // 1.1 style no longer supported in hotspot.
3881 // According the JNI spec, we should update args->version on return.
3882 // We also use the structure to communicate with launcher about default
3883 // stack size.
3884 if (args->version == JNI_VERSION_1_1) {
3885 args->version = JNI_VERSION_1_2;
3886 // javaStackSize is int in arguments structure
3887 assert(jlong(ThreadStackSize) * K < INT_MAX, "integer overflow");
3888 args->javaStackSize = (jint)(ThreadStackSize * K);
3889 }
3890 return ret;
3891 }
3892
3893 DT_RETURN_MARK_DECL(CreateJavaVM, jint
3894 , HOTSPOT_JNI_CREATEJAVAVM_RETURN(_ret_ref));
3895
3896 static jint JNI_CreateJavaVM_inner(JavaVM **vm, void **penv, void *args) {
3897 HOTSPOT_JNI_CREATEJAVAVM_ENTRY((void **) vm, penv, args);
3898
3899 jint result = JNI_ERR;
3900 DT_RETURN_MARK(CreateJavaVM, jint, (const jint&)result);
3901
3902 // We're about to use Atomic::xchg for synchronization. Some Zero
3903 // platforms use the GCC builtin __sync_lock_test_and_set for this,
3904 // but __sync_lock_test_and_set is not guaranteed to do what we want
3905 // on all architectures. So we check it works before relying on it.
3906 #if defined(ZERO) && defined(ASSERT)
3907 {
3908 jint a = 0xcafebabe;
3909 jint b = Atomic::xchg((jint) 0xdeadbeef, &a);
3910 void *c = &a;
3911 void *d = Atomic::xchg(&b, &c);
3912 assert(a == (jint) 0xdeadbeef && b == (jint) 0xcafebabe, "Atomic::xchg() works");
3913 assert(c == &b && d == &a, "Atomic::xchg() works");
3914 }
3915 #endif // ZERO && ASSERT
3916
3917 // At the moment it's only possible to have one Java VM,
3918 // since some of the runtime state is in global variables.
3919
3920 // We cannot use our mutex locks here, since they only work on
3921 // Threads. We do an atomic compare and exchange to ensure only
3922 // one thread can call this method at a time
3923
3924 // We use Atomic::xchg rather than Atomic::add/dec since on some platforms
3925 // the add/dec implementations are dependent on whether we are running
3926 // on a multiprocessor Atomic::xchg does not have this problem.
3927 if (Atomic::xchg(1, &vm_created) == 1) {
3928 return JNI_EEXIST; // already created, or create attempt in progress
3929 }
3930 if (Atomic::xchg(0, &safe_to_recreate_vm) == 0) {
3931 return JNI_ERR; // someone tried and failed and retry not allowed.
3932 }
3933
3934 assert(vm_created == 1, "vm_created is true during the creation");
3935
3936 /**
3937 * Certain errors during initialization are recoverable and do not
3938 * prevent this method from being called again at a later time
3939 * (perhaps with different arguments). However, at a certain
3940 * point during initialization if an error occurs we cannot allow
3941 * this function to be called again (or it will crash). In those
3942 * situations, the 'canTryAgain' flag is set to false, which atomically
3943 * sets safe_to_recreate_vm to 1, such that any new call to
3944 * JNI_CreateJavaVM will immediately fail using the above logic.
3945 */
3946 bool can_try_again = true;
3947
3948 result = Threads::create_vm((JavaVMInitArgs*) args, &can_try_again);
3949 if (result == JNI_OK) {
3950 JavaThread *thread = JavaThread::current();
3951 assert(!thread->has_pending_exception(), "should have returned not OK");
3952 /* thread is thread_in_vm here */
3953 *vm = (JavaVM *)(&main_vm);
3954 *(JNIEnv**)penv = thread->jni_environment();
3955
3956 #if INCLUDE_JVMCI
3957 if (EnableJVMCI) {
3958 if (UseJVMCICompiler) {
3959 // JVMCI is initialized on a CompilerThread
3960 if (BootstrapJVMCI) {
3961 JavaThread* THREAD = thread;
3962 JVMCICompiler* compiler = JVMCICompiler::instance(true, CATCH);
3963 compiler->bootstrap(THREAD);
3964 if (HAS_PENDING_EXCEPTION) {
3965 HandleMark hm;
3966 vm_exit_during_initialization(Handle(THREAD, PENDING_EXCEPTION));
3967 }
3968 }
3969 }
3970 }
3971 #endif
3972
3973 // Notify JVMTI
3974 if (JvmtiExport::should_post_thread_life()) {
3975 JvmtiExport::post_thread_start(thread);
3976 }
3977
3978 post_thread_start_event(thread);
3979
3980 #ifndef PRODUCT
3981 if (ReplayCompiles) ciReplay::replay(thread);
3982
3983 // Some platforms (like Win*) need a wrapper around these test
3984 // functions in order to properly handle error conditions.
3985 VMError::test_error_handler();
3986 #endif
3987
3988 // Since this is not a JVM_ENTRY we have to set the thread state manually before leaving.
3989 ThreadStateTransition::transition(thread, _thread_in_vm, _thread_in_native);
3990 } else {
3991 // If create_vm exits because of a pending exception, exit with that
3992 // exception. In the future when we figure out how to reclaim memory,
3993 // we may be able to exit with JNI_ERR and allow the calling application
3994 // to continue.
3995 if (Universe::is_fully_initialized()) {
3996 // otherwise no pending exception possible - VM will already have aborted
3997 JavaThread* THREAD = JavaThread::current();
3998 if (HAS_PENDING_EXCEPTION) {
3999 HandleMark hm;
4000 vm_exit_during_initialization(Handle(THREAD, PENDING_EXCEPTION));
4001 }
4002 }
4003
4004 if (can_try_again) {
4005 // reset safe_to_recreate_vm to 1 so that retrial would be possible
4006 safe_to_recreate_vm = 1;
4007 }
4008
4009 // Creation failed. We must reset vm_created
4010 *vm = 0;
4011 *(JNIEnv**)penv = 0;
4012 // reset vm_created last to avoid race condition. Use OrderAccess to
4013 // control both compiler and architectural-based reordering.
4014 OrderAccess::release_store(&vm_created, 0);
4015 }
4016
4017 // Flush stdout and stderr before exit.
4018 fflush(stdout);
4019 fflush(stderr);
4020
4021 return result;
4022
4023 }
4024
4025 _JNI_IMPORT_OR_EXPORT_ jint JNICALL JNI_CreateJavaVM(JavaVM **vm, void **penv, void *args) {
4026 jint result = JNI_ERR;
4027 // On Windows, let CreateJavaVM run with SEH protection
4028 #ifdef _WIN32
4029 __try {
4030 #endif
4031 result = JNI_CreateJavaVM_inner(vm, penv, args);
4032 #ifdef _WIN32
4033 } __except(topLevelExceptionFilter((_EXCEPTION_POINTERS*)_exception_info())) {
4034 // Nothing to do.
4035 }
4036 #endif
4037 return result;
4038 }
4039
4040 _JNI_IMPORT_OR_EXPORT_ jint JNICALL JNI_GetCreatedJavaVMs(JavaVM **vm_buf, jsize bufLen, jsize *numVMs) {
4041 // See bug 4367188, the wrapper can sometimes cause VM crashes
4042 // JNIWrapper("GetCreatedJavaVMs");
4043
4044 HOTSPOT_JNI_GETCREATEDJAVAVMS_ENTRY((void **) vm_buf, bufLen, (uintptr_t *) numVMs);
4045
4046 if (vm_created == 1) {
4047 if (numVMs != NULL) *numVMs = 1;
4048 if (bufLen > 0) *vm_buf = (JavaVM *)(&main_vm);
4049 } else {
4050 if (numVMs != NULL) *numVMs = 0;
4051 }
4052 HOTSPOT_JNI_GETCREATEDJAVAVMS_RETURN(JNI_OK);
4053 return JNI_OK;
4054 }
4055
4056 extern "C" {
4057
4058 DT_RETURN_MARK_DECL(DestroyJavaVM, jint
4059 , HOTSPOT_JNI_DESTROYJAVAVM_RETURN(_ret_ref));
4060
4061 static jint JNICALL jni_DestroyJavaVM_inner(JavaVM *vm) {
4062 HOTSPOT_JNI_DESTROYJAVAVM_ENTRY(vm);
4063 jint res = JNI_ERR;
4064 DT_RETURN_MARK(DestroyJavaVM, jint, (const jint&)res);
4065
4066 if (vm_created == 0) {
4067 res = JNI_ERR;
4068 return res;
4069 }
4070
4071 JNIWrapper("DestroyJavaVM");
4072 JNIEnv *env;
4073 JavaVMAttachArgs destroyargs;
4074 destroyargs.version = CurrentVersion;
4075 destroyargs.name = (char *)"DestroyJavaVM";
4076 destroyargs.group = NULL;
4077 res = vm->AttachCurrentThread((void **)&env, (void *)&destroyargs);
4078 if (res != JNI_OK) {
4079 return res;
4080 }
4081
4082 // Since this is not a JVM_ENTRY we have to set the thread state manually before entering.
4083 JavaThread* thread = JavaThread::current();
4084 ThreadStateTransition::transition_from_native(thread, _thread_in_vm);
4085 if (Threads::destroy_vm()) {
4086 // Should not change thread state, VM is gone
4087 vm_created = 0;
4088 res = JNI_OK;
4089 return res;
4090 } else {
4091 ThreadStateTransition::transition(thread, _thread_in_vm, _thread_in_native);
4092 res = JNI_ERR;
4093 return res;
4094 }
4095 }
4096
4097 jint JNICALL jni_DestroyJavaVM(JavaVM *vm) {
4098 jint result = JNI_ERR;
4099 // On Windows, we need SEH protection
4100 #ifdef _WIN32
4101 __try {
4102 #endif
4103 result = jni_DestroyJavaVM_inner(vm);
4104 #ifdef _WIN32
4105 } __except(topLevelExceptionFilter((_EXCEPTION_POINTERS*)_exception_info())) {
4106 // Nothing to do.
4107 }
4108 #endif
4109 return result;
4110 }
4111
4112 static jint attach_current_thread(JavaVM *vm, void **penv, void *_args, bool daemon) {
4113 JavaVMAttachArgs *args = (JavaVMAttachArgs *) _args;
4114
4115 // Check below commented out from JDK1.2fcs as well
4116 /*
4117 if (args && (args->version != JNI_VERSION_1_1 || args->version != JNI_VERSION_1_2)) {
4118 return JNI_EVERSION;
4119 }
4120 */
4121
4122 Thread* t = Thread::current_or_null();
4123 if (t != NULL) {
4124 // If the thread has been attached this operation is a no-op
4125 *(JNIEnv**)penv = ((JavaThread*) t)->jni_environment();
4126 return JNI_OK;
4127 }
4128
4129 // Create a thread and mark it as attaching so it will be skipped by the
4130 // ThreadsListEnumerator - see CR 6404306
4131 JavaThread* thread = new JavaThread(true);
4132
4133 // Set correct safepoint info. The thread is going to call into Java when
4134 // initializing the Java level thread object. Hence, the correct state must
4135 // be set in order for the Safepoint code to deal with it correctly.
4136 thread->set_thread_state(_thread_in_vm);
4137 thread->record_stack_base_and_size();
4138 thread->register_thread_stack_with_NMT();
4139 thread->initialize_thread_current();
4140
4141 if (!os::create_attached_thread(thread)) {
4142 thread->smr_delete();
4143 return JNI_ERR;
4144 }
4145 // Enable stack overflow checks
4146 thread->create_stack_guard_pages();
4147
4148 thread->initialize_tlab();
4149
4150 thread->cache_global_variables();
4151
4152 // This thread will not do a safepoint check, since it has
4153 // not been added to the Thread list yet.
4154 { MutexLocker ml(Threads_lock);
4155 // This must be inside this lock in order to get FullGCALot to work properly, i.e., to
4156 // avoid this thread trying to do a GC before it is added to the thread-list
4157 thread->set_active_handles(JNIHandleBlock::allocate_block());
4158 Threads::add(thread, daemon);
4159 }
4160 // Create thread group and name info from attach arguments
4161 oop group = NULL;
4162 char* thread_name = NULL;
4163 if (args != NULL && Threads::is_supported_jni_version(args->version)) {
4164 group = JNIHandles::resolve(args->group);
4165 thread_name = args->name; // may be NULL
4166 }
4167 if (group == NULL) group = Universe::main_thread_group();
4168
4169 // Create Java level thread object and attach it to this thread
4170 bool attach_failed = false;
4171 {
4172 EXCEPTION_MARK;
4173 HandleMark hm(THREAD);
4174 Handle thread_group(THREAD, group);
4175 thread->allocate_threadObj(thread_group, thread_name, daemon, THREAD);
4176 if (HAS_PENDING_EXCEPTION) {
4177 CLEAR_PENDING_EXCEPTION;
4178 // cleanup outside the handle mark.
4179 attach_failed = true;
4180 }
4181 }
4182
4183 if (attach_failed) {
4184 // Added missing cleanup
4185 thread->cleanup_failed_attach_current_thread(daemon);
4186 return JNI_ERR;
4187 }
4188
4189 // mark the thread as no longer attaching
4190 // this uses a fence to push the change through so we don't have
4191 // to regrab the threads_lock
4192 thread->set_done_attaching_via_jni();
4193
4194 // Set java thread status.
4195 java_lang_Thread::set_thread_status(thread->threadObj(),
4196 java_lang_Thread::RUNNABLE);
4197
4198 // Notify the debugger
4199 if (JvmtiExport::should_post_thread_life()) {
4200 JvmtiExport::post_thread_start(thread);
4201 }
4202
4203 post_thread_start_event(thread);
4204
4205 *(JNIEnv**)penv = thread->jni_environment();
4206
4207 // Now leaving the VM, so change thread_state. This is normally automatically taken care
4208 // of in the JVM_ENTRY. But in this situation we have to do it manually. Notice, that by
4209 // using ThreadStateTransition::transition, we do a callback to the safepoint code if
4210 // needed.
4211
4212 ThreadStateTransition::transition(thread, _thread_in_vm, _thread_in_native);
4213
4214 // Perform any platform dependent FPU setup
4215 os::setup_fpu();
4216
4217 return JNI_OK;
4218 }
4219
4220
4221 jint JNICALL jni_AttachCurrentThread(JavaVM *vm, void **penv, void *_args) {
4222 HOTSPOT_JNI_ATTACHCURRENTTHREAD_ENTRY(vm, penv, _args);
4223 if (vm_created == 0) {
4224 HOTSPOT_JNI_ATTACHCURRENTTHREAD_RETURN((uint32_t) JNI_ERR);
4225 return JNI_ERR;
4226 }
4227
4228 JNIWrapper("AttachCurrentThread");
4229 jint ret = attach_current_thread(vm, penv, _args, false);
4230 HOTSPOT_JNI_ATTACHCURRENTTHREAD_RETURN(ret);
4231 return ret;
4232 }
4233
4234
4235 jint JNICALL jni_DetachCurrentThread(JavaVM *vm) {
4236 HOTSPOT_JNI_DETACHCURRENTTHREAD_ENTRY(vm);
4237
4238 JNIWrapper("DetachCurrentThread");
4239
4240 // If the thread has already been detached the operation is a no-op
4241 if (Thread::current_or_null() == NULL) {
4242 HOTSPOT_JNI_DETACHCURRENTTHREAD_RETURN(JNI_OK);
4243 return JNI_OK;
4244 }
4245
4246 VM_Exit::block_if_vm_exited();
4247
4248 JavaThread* thread = JavaThread::current();
4249 if (thread->has_last_Java_frame()) {
4250 HOTSPOT_JNI_DETACHCURRENTTHREAD_RETURN((uint32_t) JNI_ERR);
4251 // Can't detach a thread that's running java, that can't work.
4252 return JNI_ERR;
4253 }
4254
4255 // Safepoint support. Have to do call-back to safepoint code, if in the
4256 // middle of a safepoint operation
4257 ThreadStateTransition::transition_from_native(thread, _thread_in_vm);
4258
4259 // XXX: Note that JavaThread::exit() call below removes the guards on the
4260 // stack pages set up via enable_stack_{red,yellow}_zone() calls
4261 // above in jni_AttachCurrentThread. Unfortunately, while the setting
4262 // of the guards is visible in jni_AttachCurrentThread above,
4263 // the removal of the guards is buried below in JavaThread::exit()
4264 // here. The abstraction should be more symmetrically either exposed
4265 // or hidden (e.g. it could probably be hidden in the same
4266 // (platform-dependent) methods where we do alternate stack
4267 // maintenance work?)
4268 thread->exit(false, JavaThread::jni_detach);
4269 thread->smr_delete();
4270
4271 HOTSPOT_JNI_DETACHCURRENTTHREAD_RETURN(JNI_OK);
4272 return JNI_OK;
4273 }
4274
4275 DT_RETURN_MARK_DECL(GetEnv, jint
4276 , HOTSPOT_JNI_GETENV_RETURN(_ret_ref));
4277
4278 jint JNICALL jni_GetEnv(JavaVM *vm, void **penv, jint version) {
4279 HOTSPOT_JNI_GETENV_ENTRY(vm, penv, version);
4280 jint ret = JNI_ERR;
4281 DT_RETURN_MARK(GetEnv, jint, (const jint&)ret);
4282
4283 if (vm_created == 0) {
4284 *penv = NULL;
4285 ret = JNI_EDETACHED;
4286 return ret;
4287 }
4288
4289 if (JniExportedInterface::GetExportedInterface(vm, penv, version, &ret)) {
4290 return ret;
4291 }
4292
4293 #ifndef JVMPI_VERSION_1
4294 // need these in order to be polite about older agents
4295 #define JVMPI_VERSION_1 ((jint)0x10000001)
4296 #define JVMPI_VERSION_1_1 ((jint)0x10000002)
4297 #define JVMPI_VERSION_1_2 ((jint)0x10000003)
4298 #endif // !JVMPI_VERSION_1
4299
4300 Thread* thread = Thread::current_or_null();
4301 if (thread != NULL && thread->is_Java_thread()) {
4302 if (Threads::is_supported_jni_version_including_1_1(version)) {
4303 *(JNIEnv**)penv = ((JavaThread*) thread)->jni_environment();
4304 ret = JNI_OK;
4305 return ret;
4306
4307 } else if (version == JVMPI_VERSION_1 ||
4308 version == JVMPI_VERSION_1_1 ||
4309 version == JVMPI_VERSION_1_2) {
4310 tty->print_cr("ERROR: JVMPI, an experimental interface, is no longer supported.");
4311 tty->print_cr("Please use the supported interface: the JVM Tool Interface (JVM TI).");
4312 ret = JNI_EVERSION;
4313 return ret;
4314 } else if (JvmtiExport::is_jvmdi_version(version)) {
4315 tty->print_cr("FATAL ERROR: JVMDI is no longer supported.");
4316 tty->print_cr("Please use the supported interface: the JVM Tool Interface (JVM TI).");
4317 ret = JNI_EVERSION;
4318 return ret;
4319 } else {
4320 *penv = NULL;
4321 ret = JNI_EVERSION;
4322 return ret;
4323 }
4324 } else {
4325 *penv = NULL;
4326 ret = JNI_EDETACHED;
4327 return ret;
4328 }
4329 }
4330
4331
4332 jint JNICALL jni_AttachCurrentThreadAsDaemon(JavaVM *vm, void **penv, void *_args) {
4333 HOTSPOT_JNI_ATTACHCURRENTTHREADASDAEMON_ENTRY(vm, penv, _args);
4334 if (vm_created == 0) {
4335 HOTSPOT_JNI_ATTACHCURRENTTHREADASDAEMON_RETURN((uint32_t) JNI_ERR);
4336 return JNI_ERR;
4337 }
4338
4339 JNIWrapper("AttachCurrentThreadAsDaemon");
4340 jint ret = attach_current_thread(vm, penv, _args, true);
4341 HOTSPOT_JNI_ATTACHCURRENTTHREADASDAEMON_RETURN(ret);
4342 return ret;
4343 }
4344
4345
4346 } // End extern "C"
4347
4348 const struct JNIInvokeInterface_ jni_InvokeInterface = {
4349 NULL,
4350 NULL,
4351 NULL,
4352
4353 jni_DestroyJavaVM,
4354 jni_AttachCurrentThread,
4355 jni_DetachCurrentThread,
4356 jni_GetEnv,
4357 jni_AttachCurrentThreadAsDaemon
4358 };