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