1 /*
2 * Copyright (c) 1997, 2016, 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 "ci/ciReplay.hpp"
28 #include "classfile/altHashing.hpp"
29 #include "classfile/classFileStream.hpp"
30 #include "classfile/classLoader.hpp"
31 #include "classfile/javaClasses.inline.hpp"
32 #include "classfile/symbolTable.hpp"
33 #include "classfile/systemDictionary.hpp"
34 #include "classfile/vmSymbols.hpp"
35 #include "gc/shared/gcLocker.inline.hpp"
36 #include "interpreter/linkResolver.hpp"
37 #include "memory/allocation.hpp"
38 #include "memory/allocation.inline.hpp"
39 #include "memory/oopFactory.hpp"
40 #include "memory/resourceArea.hpp"
41 #include "memory/universe.inline.hpp"
42 #include "oops/instanceKlass.hpp"
43 #include "oops/instanceOop.hpp"
44 #include "oops/markOop.hpp"
45 #include "oops/method.hpp"
46 #include "oops/objArrayKlass.hpp"
47 #include "oops/objArrayOop.inline.hpp"
48 #include "oops/oop.inline.hpp"
49 #include "oops/symbol.hpp"
50 #include "oops/typeArrayKlass.hpp"
51 #include "oops/typeArrayOop.hpp"
52 #include "prims/jni.h"
53 #include "prims/jniCheck.hpp"
54 #include "prims/jniExport.hpp"
55 #include "prims/jniFastGetField.hpp"
56 #include "prims/jvm.h"
57 #include "prims/jvm_misc.hpp"
58 #include "prims/jvmtiExport.hpp"
59 #include "prims/jvmtiThreadState.hpp"
60 #include "runtime/atomic.inline.hpp"
61 #include "runtime/compilationPolicy.hpp"
62 #include "runtime/fieldDescriptor.hpp"
63 #include "runtime/fprofiler.hpp"
64 #include "runtime/handles.inline.hpp"
65 #include "runtime/interfaceSupport.hpp"
66 #include "runtime/java.hpp"
67 #include "runtime/javaCalls.hpp"
68 #include "runtime/jfieldIDWorkaround.hpp"
69 #include "runtime/orderAccess.inline.hpp"
70 #include "runtime/reflection.hpp"
71 #include "runtime/sharedRuntime.hpp"
72 #include "runtime/signature.hpp"
73 #include "runtime/thread.inline.hpp"
74 #include "runtime/vm_operations.hpp"
75 #include "services/memTracker.hpp"
76 #include "services/runtimeService.hpp"
77 #include "trace/traceMacros.hpp"
78 #include "trace/tracing.hpp"
79 #include "utilities/defaultStream.hpp"
80 #include "utilities/dtrace.hpp"
81 #include "utilities/events.hpp"
82 #include "utilities/histogram.hpp"
83 #include "utilities/internalVMTests.hpp"
84 #include "utilities/macros.hpp"
85 #if INCLUDE_ALL_GCS
86 #include "gc/g1/g1SATBCardTableModRefBS.hpp"
87 #endif // INCLUDE_ALL_GCS
88 #if INCLUDE_JVMCI
89 #include "jvmci/jvmciCompiler.hpp"
90 #include "jvmci/jvmciRuntime.hpp"
91 #endif
92
93 static jint CurrentVersion = JNI_VERSION_9;
94
95 #ifdef _WIN32
96 extern LONG WINAPI topLevelExceptionFilter(_EXCEPTION_POINTERS* );
97 #endif
98
99 // The DT_RETURN_MARK macros create a scoped object to fire the dtrace
100 // '-return' probe regardless of the return path is taken out of the function.
101 // Methods that have multiple return paths use this to avoid having to
102 // instrument each return path. Methods that use CHECK or THROW must use this
103 // since those macros can cause an immedate uninstrumented return.
104 //
105 // In order to get the return value, a reference to the variable containing
106 // the return value must be passed to the contructor of the object, and
107 // the return value must be set before return (since the mark object has
108 // a reference to it).
109 //
110 // Example:
111 // DT_RETURN_MARK_DECL(SomeFunc, int);
112 // JNI_ENTRY(int, SomeFunc, ...)
113 // int return_value = 0;
114 // DT_RETURN_MARK(SomeFunc, int, (const int&)return_value);
115 // foo(CHECK_0)
116 // return_value = 5;
117 // return return_value;
118 // JNI_END
119 #define DT_RETURN_MARK_DECL(name, type, probe) \
120 DTRACE_ONLY( \
121 class DTraceReturnProbeMark_##name { \
122 public: \
123 const type& _ret_ref; \
124 DTraceReturnProbeMark_##name(const type& v) : _ret_ref(v) {} \
125 ~DTraceReturnProbeMark_##name() { \
126 probe; \
127 } \
128 } \
129 )
130 // Void functions are simpler since there's no return value
131 #define DT_VOID_RETURN_MARK_DECL(name, probe) \
132 DTRACE_ONLY( \
133 class DTraceReturnProbeMark_##name { \
134 public: \
135 ~DTraceReturnProbeMark_##name() { \
136 probe; \
137 } \
138 } \
139 )
140
141 // Place these macros in the function to mark the return. Non-void
142 // functions need the type and address of the return value.
143 #define DT_RETURN_MARK(name, type, ref) \
144 DTRACE_ONLY( DTraceReturnProbeMark_##name dtrace_return_mark(ref) )
145 #define DT_VOID_RETURN_MARK(name) \
146 DTRACE_ONLY( DTraceReturnProbeMark_##name dtrace_return_mark )
147
148
149 // Use these to select distinct code for floating-point vs. non-floating point
150 // situations. Used from within common macros where we need slightly
151 // different behavior for Float/Double
152 #define FP_SELECT_Boolean(intcode, fpcode) intcode
153 #define FP_SELECT_Byte(intcode, fpcode) intcode
154 #define FP_SELECT_Char(intcode, fpcode) intcode
155 #define FP_SELECT_Short(intcode, fpcode) intcode
156 #define FP_SELECT_Object(intcode, fpcode) intcode
157 #define FP_SELECT_Int(intcode, fpcode) intcode
158 #define FP_SELECT_Long(intcode, fpcode) intcode
159 #define FP_SELECT_Float(intcode, fpcode) fpcode
160 #define FP_SELECT_Double(intcode, fpcode) fpcode
161 #define FP_SELECT(TypeName, intcode, fpcode) \
162 FP_SELECT_##TypeName(intcode, fpcode)
163
164 #define COMMA ,
165
166 // Choose DT_RETURN_MARK macros based on the type: float/double -> void
167 // (dtrace doesn't do FP yet)
168 #define DT_RETURN_MARK_DECL_FOR(TypeName, name, type, probe) \
169 FP_SELECT(TypeName, \
170 DT_RETURN_MARK_DECL(name, type, probe), DT_VOID_RETURN_MARK_DECL(name, probe) )
171 #define DT_RETURN_MARK_FOR(TypeName, name, type, ref) \
172 FP_SELECT(TypeName, \
173 DT_RETURN_MARK(name, type, ref), DT_VOID_RETURN_MARK(name) )
174
175
176 // out-of-line helpers for class jfieldIDWorkaround:
177
178 bool jfieldIDWorkaround::is_valid_jfieldID(Klass* k, jfieldID id) {
179 if (jfieldIDWorkaround::is_instance_jfieldID(k, id)) {
180 uintptr_t as_uint = (uintptr_t) id;
181 intptr_t offset = raw_instance_offset(id);
182 if (is_checked_jfieldID(id)) {
183 if (!klass_hash_ok(k, id)) {
184 return false;
185 }
186 }
187 return InstanceKlass::cast(k)->contains_field_offset(offset);
188 } else {
189 JNIid* result = (JNIid*) id;
190 #ifdef ASSERT
191 return result != NULL && result->is_static_field_id();
192 #else
193 return result != NULL;
194 #endif
195 }
196 }
197
198
199 intptr_t jfieldIDWorkaround::encode_klass_hash(Klass* k, intptr_t offset) {
200 if (offset <= small_offset_mask) {
201 Klass* field_klass = k;
202 Klass* super_klass = field_klass->super();
203 // With compressed oops the most super class with nonstatic fields would
204 // be the owner of fields embedded in the header.
205 while (InstanceKlass::cast(super_klass)->has_nonstatic_fields() &&
206 InstanceKlass::cast(super_klass)->contains_field_offset(offset)) {
207 field_klass = super_klass; // super contains the field also
208 super_klass = field_klass->super();
209 }
210 debug_only(NoSafepointVerifier nosafepoint;)
211 uintptr_t klass_hash = field_klass->identity_hash();
212 return ((klass_hash & klass_mask) << klass_shift) | checked_mask_in_place;
213 } else {
214 #if 0
215 #ifndef PRODUCT
216 {
217 ResourceMark rm;
218 warning("VerifyJNIFields: long offset %d in %s", offset, k->external_name());
219 }
220 #endif
221 #endif
222 return 0;
223 }
224 }
225
226 bool jfieldIDWorkaround::klass_hash_ok(Klass* k, jfieldID id) {
227 uintptr_t as_uint = (uintptr_t) id;
228 intptr_t klass_hash = (as_uint >> klass_shift) & klass_mask;
229 do {
230 debug_only(NoSafepointVerifier nosafepoint;)
231 // Could use a non-blocking query for identity_hash here...
232 if ((k->identity_hash() & klass_mask) == klass_hash)
233 return true;
234 k = k->super();
235 } while (k != NULL);
236 return false;
237 }
238
239 void jfieldIDWorkaround::verify_instance_jfieldID(Klass* k, jfieldID id) {
240 guarantee(jfieldIDWorkaround::is_instance_jfieldID(k, id), "must be an instance field" );
241 uintptr_t as_uint = (uintptr_t) id;
242 intptr_t offset = raw_instance_offset(id);
243 if (VerifyJNIFields) {
244 if (is_checked_jfieldID(id)) {
245 guarantee(klass_hash_ok(k, id),
246 "Bug in native code: jfieldID class must match object");
247 } else {
248 #if 0
249 #ifndef PRODUCT
250 if (Verbose) {
251 ResourceMark rm;
252 warning("VerifyJNIFields: unverified offset %d for %s", offset, k->external_name());
253 }
254 #endif
255 #endif
256 }
257 }
258 guarantee(InstanceKlass::cast(k)->contains_field_offset(offset),
259 "Bug in native code: jfieldID offset must address interior of object");
260 }
261
262 // Wrapper to trace JNI functions
263
264 #ifdef ASSERT
265 Histogram* JNIHistogram;
266 static volatile jint JNIHistogram_lock = 0;
267
268 class JNIHistogramElement : public HistogramElement {
269 public:
270 JNIHistogramElement(const char* name);
271 };
272
273 JNIHistogramElement::JNIHistogramElement(const char* elementName) {
274 _name = elementName;
275 uintx count = 0;
276
277 while (Atomic::cmpxchg(1, &JNIHistogram_lock, 0) != 0) {
278 while (OrderAccess::load_acquire(&JNIHistogram_lock) != 0) {
279 count +=1;
280 if ( (WarnOnStalledSpinLock > 0)
281 && (count % WarnOnStalledSpinLock == 0)) {
282 warning("JNIHistogram_lock seems to be stalled");
283 }
284 }
285 }
286
287
288 if(JNIHistogram == NULL)
289 JNIHistogram = new Histogram("JNI Call Counts",100);
290
291 JNIHistogram->add_element(this);
292 Atomic::dec(&JNIHistogram_lock);
293 }
294
295 #define JNICountWrapper(arg) \
296 static JNIHistogramElement* e = new JNIHistogramElement(arg); \
297 /* There is a MT-race condition in VC++. So we need to make sure that that e has been initialized */ \
298 if (e != NULL) e->increment_count()
299 #define JNIWrapper(arg) JNICountWrapper(arg);
300 #else
301 #define JNIWrapper(arg)
302 #endif
303
304
305 // Implementation of JNI entries
306
307 DT_RETURN_MARK_DECL(DefineClass, jclass
308 , HOTSPOT_JNI_DEFINECLASS_RETURN(_ret_ref));
309
310 JNI_ENTRY(jclass, jni_DefineClass(JNIEnv *env, const char *name, jobject loaderRef,
311 const jbyte *buf, jsize bufLen))
312 JNIWrapper("DefineClass");
313
314 HOTSPOT_JNI_DEFINECLASS_ENTRY(
315 env, (char*) name, loaderRef, (char*) buf, bufLen);
316
317 jclass cls = NULL;
318 DT_RETURN_MARK(DefineClass, jclass, (const jclass&)cls);
319
320 TempNewSymbol class_name = NULL;
321 // Since exceptions can be thrown, class initialization can take place
322 // if name is NULL no check for class name in .class stream has to be made.
323 if (name != NULL) {
324 const int str_len = (int)strlen(name);
325 if (str_len > Symbol::max_length()) {
326 // It's impossible to create this class; the name cannot fit
327 // into the constant pool.
328 THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), name);
329 }
330 class_name = SymbolTable::new_symbol(name, CHECK_NULL);
331 }
332 ResourceMark rm(THREAD);
333 ClassFileStream st((u1*)buf, bufLen, NULL, ClassFileStream::verify);
334 Handle class_loader (THREAD, JNIHandles::resolve(loaderRef));
335
336 if (UsePerfData && !class_loader.is_null()) {
337 // check whether the current caller thread holds the lock or not.
338 // If not, increment the corresponding counter
339 if (ObjectSynchronizer::
340 query_lock_ownership((JavaThread*)THREAD, class_loader) !=
341 ObjectSynchronizer::owner_self) {
342 ClassLoader::sync_JNIDefineClassLockFreeCounter()->inc();
343 }
344 }
345 Klass* k = SystemDictionary::resolve_from_stream(class_name,
346 class_loader,
347 Handle(),
348 &st,
349 CHECK_NULL);
350
351 if (log_is_enabled(Debug, classresolve) && k != NULL) {
352 trace_class_resolution(k);
353 }
354
355 cls = (jclass)JNIHandles::make_local(
356 env, k->java_mirror());
357 return cls;
358 JNI_END
359
360
361
362 static bool first_time_FindClass = true;
363
364 DT_RETURN_MARK_DECL(FindClass, jclass
365 , HOTSPOT_JNI_FINDCLASS_RETURN(_ret_ref));
366
367 JNI_ENTRY(jclass, jni_FindClass(JNIEnv *env, const char *name))
368 JNIWrapper("FindClass");
369
370 HOTSPOT_JNI_FINDCLASS_ENTRY(env, (char *)name);
371
372 jclass result = NULL;
373 DT_RETURN_MARK(FindClass, jclass, (const jclass&)result);
374
375 // Remember if we are the first invocation of jni_FindClass
376 bool first_time = first_time_FindClass;
377 first_time_FindClass = false;
378
379 // Sanity check the name: it cannot be null or larger than the maximum size
380 // name we can fit in the constant pool.
381 if (name == NULL || (int)strlen(name) > Symbol::max_length()) {
382 THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), name);
383 }
384
385 //%note jni_3
386 Handle loader;
387 Handle protection_domain;
388 // Find calling class
389 instanceKlassHandle k (THREAD, thread->security_get_caller_class(0));
390 if (k.not_null()) {
391 loader = Handle(THREAD, k->class_loader());
392 // Special handling to make sure JNI_OnLoad and JNI_OnUnload are executed
393 // in the correct class context.
394 if (loader.is_null() &&
395 k->name() == vmSymbols::java_lang_ClassLoader_NativeLibrary()) {
396 JavaValue result(T_OBJECT);
397 JavaCalls::call_static(&result, k,
398 vmSymbols::getFromClass_name(),
399 vmSymbols::void_class_signature(),
400 thread);
401 if (HAS_PENDING_EXCEPTION) {
402 Handle ex(thread, thread->pending_exception());
403 CLEAR_PENDING_EXCEPTION;
404 THROW_HANDLE_0(ex);
405 }
406 oop mirror = (oop) result.get_jobject();
407 loader = Handle(THREAD,
408 InstanceKlass::cast(java_lang_Class::as_Klass(mirror))->class_loader());
409 protection_domain = Handle(THREAD,
410 InstanceKlass::cast(java_lang_Class::as_Klass(mirror))->protection_domain());
411 }
412 } else {
413 // We call ClassLoader.getSystemClassLoader to obtain the system class loader.
414 loader = Handle(THREAD, SystemDictionary::java_system_loader());
415 }
416
417 TempNewSymbol sym = SymbolTable::new_symbol(name, CHECK_NULL);
418 result = find_class_from_class_loader(env, sym, true, loader,
419 protection_domain, true, thread);
420
421 if (log_is_enabled(Debug, classresolve) && result != NULL) {
422 trace_class_resolution(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(result)));
423 }
424
425 // If we were the first invocation of jni_FindClass, we enable compilation again
426 // rather than just allowing invocation counter to overflow and decay.
427 // Controlled by flag DelayCompilationDuringStartup.
428 if (first_time && !CompileTheWorld)
429 CompilationPolicy::completed_vm_startup();
430
431 return result;
432 JNI_END
433
434 DT_RETURN_MARK_DECL(FromReflectedMethod, jmethodID
435 , HOTSPOT_JNI_FROMREFLECTEDMETHOD_RETURN((uintptr_t)_ret_ref));
436
437 JNI_ENTRY(jmethodID, jni_FromReflectedMethod(JNIEnv *env, jobject method))
438 JNIWrapper("FromReflectedMethod");
439
440 HOTSPOT_JNI_FROMREFLECTEDMETHOD_ENTRY(env, method);
441
442 jmethodID ret = NULL;
443 DT_RETURN_MARK(FromReflectedMethod, jmethodID, (const jmethodID&)ret);
444
445 // method is a handle to a java.lang.reflect.Method object
446 oop reflected = JNIHandles::resolve_non_null(method);
447 oop mirror = NULL;
448 int slot = 0;
449
450 if (reflected->klass() == SystemDictionary::reflect_Constructor_klass()) {
451 mirror = java_lang_reflect_Constructor::clazz(reflected);
452 slot = java_lang_reflect_Constructor::slot(reflected);
453 } else {
454 assert(reflected->klass() == SystemDictionary::reflect_Method_klass(), "wrong type");
455 mirror = java_lang_reflect_Method::clazz(reflected);
456 slot = java_lang_reflect_Method::slot(reflected);
457 }
458 Klass* k = java_lang_Class::as_Klass(mirror);
459
460 KlassHandle k1(THREAD, k);
461 // Make sure class is initialized before handing id's out to methods
462 k1()->initialize(CHECK_NULL);
463 Method* m = InstanceKlass::cast(k1())->method_with_idnum(slot);
464 ret = m==NULL? NULL : m->jmethod_id(); // return NULL if reflected method deleted
465 return ret;
466 JNI_END
467
468 DT_RETURN_MARK_DECL(FromReflectedField, jfieldID
469 , HOTSPOT_JNI_FROMREFLECTEDFIELD_RETURN((uintptr_t)_ret_ref));
470
471 JNI_ENTRY(jfieldID, jni_FromReflectedField(JNIEnv *env, jobject field))
472 JNIWrapper("FromReflectedField");
473
474 HOTSPOT_JNI_FROMREFLECTEDFIELD_ENTRY(env, field);
475
476 jfieldID ret = NULL;
477 DT_RETURN_MARK(FromReflectedField, jfieldID, (const jfieldID&)ret);
478
479 // field is a handle to a java.lang.reflect.Field object
480 oop reflected = JNIHandles::resolve_non_null(field);
481 oop mirror = java_lang_reflect_Field::clazz(reflected);
482 Klass* k = java_lang_Class::as_Klass(mirror);
483 int slot = java_lang_reflect_Field::slot(reflected);
484 int modifiers = java_lang_reflect_Field::modifiers(reflected);
485
486 KlassHandle k1(THREAD, k);
487 // Make sure class is initialized before handing id's out to fields
488 k1()->initialize(CHECK_NULL);
489
490 // First check if this is a static field
491 if (modifiers & JVM_ACC_STATIC) {
492 intptr_t offset = InstanceKlass::cast(k1())->field_offset( slot );
493 JNIid* id = InstanceKlass::cast(k1())->jni_id_for(offset);
494 assert(id != NULL, "corrupt Field object");
495 debug_only(id->set_is_static_field_id();)
496 // A jfieldID for a static field is a JNIid specifying the field holder and the offset within the Klass*
497 ret = jfieldIDWorkaround::to_static_jfieldID(id);
498 return ret;
499 }
500
501 // The slot is the index of the field description in the field-array
502 // The jfieldID is the offset of the field within the object
503 // It may also have hash bits for k, if VerifyJNIFields is turned on.
504 intptr_t offset = InstanceKlass::cast(k1())->field_offset( slot );
505 assert(InstanceKlass::cast(k1())->contains_field_offset(offset), "stay within object");
506 ret = jfieldIDWorkaround::to_instance_jfieldID(k1(), offset);
507 return ret;
508 JNI_END
509
510
511 DT_RETURN_MARK_DECL(ToReflectedMethod, jobject
512 , HOTSPOT_JNI_TOREFLECTEDMETHOD_RETURN(_ret_ref));
513
514 JNI_ENTRY(jobject, jni_ToReflectedMethod(JNIEnv *env, jclass cls, jmethodID method_id, jboolean isStatic))
515 JNIWrapper("ToReflectedMethod");
516
517 HOTSPOT_JNI_TOREFLECTEDMETHOD_ENTRY(env, cls, (uintptr_t) method_id, isStatic);
518
519 jobject ret = NULL;
520 DT_RETURN_MARK(ToReflectedMethod, jobject, (const jobject&)ret);
521
522 methodHandle m (THREAD, Method::resolve_jmethod_id(method_id));
523 assert(m->is_static() == (isStatic != 0), "jni_ToReflectedMethod access flags doesn't match");
524 oop reflection_method;
525 if (m->is_initializer()) {
526 reflection_method = Reflection::new_constructor(m, CHECK_NULL);
527 } else {
528 reflection_method = Reflection::new_method(m, false, CHECK_NULL);
529 }
530 ret = JNIHandles::make_local(env, reflection_method);
531 return ret;
532 JNI_END
533
534 DT_RETURN_MARK_DECL(GetSuperclass, jclass
535 , HOTSPOT_JNI_GETSUPERCLASS_RETURN(_ret_ref));
536
537 JNI_ENTRY(jclass, jni_GetSuperclass(JNIEnv *env, jclass sub))
538 JNIWrapper("GetSuperclass");
539
540 HOTSPOT_JNI_GETSUPERCLASS_ENTRY(env, sub);
541
542 jclass obj = NULL;
543 DT_RETURN_MARK(GetSuperclass, jclass, (const jclass&)obj);
544
545 oop mirror = JNIHandles::resolve_non_null(sub);
546 // primitive classes return NULL
547 if (java_lang_Class::is_primitive(mirror)) return NULL;
548
549 // Rules of Class.getSuperClass as implemented by KLass::java_super:
550 // arrays return Object
551 // interfaces return NULL
552 // proper classes return Klass::super()
553 Klass* k = java_lang_Class::as_Klass(mirror);
554 if (k->is_interface()) return NULL;
555
556 // return mirror for superclass
557 Klass* super = k->java_super();
558 // super2 is the value computed by the compiler's getSuperClass intrinsic:
559 debug_only(Klass* super2 = ( k->is_array_klass()
560 ? SystemDictionary::Object_klass()
561 : k->super() ) );
562 assert(super == super2,
563 "java_super computation depends on interface, array, other super");
564 obj = (super == NULL) ? NULL : (jclass) JNIHandles::make_local(super->java_mirror());
565 return obj;
566 JNI_END
567
568 JNI_QUICK_ENTRY(jboolean, jni_IsAssignableFrom(JNIEnv *env, jclass sub, jclass super))
569 JNIWrapper("IsSubclassOf");
570
571 HOTSPOT_JNI_ISASSIGNABLEFROM_ENTRY(env, sub, super);
572
573 oop sub_mirror = JNIHandles::resolve_non_null(sub);
574 oop super_mirror = JNIHandles::resolve_non_null(super);
575 if (java_lang_Class::is_primitive(sub_mirror) ||
576 java_lang_Class::is_primitive(super_mirror)) {
577 jboolean ret = (sub_mirror == super_mirror);
578
579 HOTSPOT_JNI_ISASSIGNABLEFROM_RETURN(ret);
580 return ret;
581 }
582 Klass* sub_klass = java_lang_Class::as_Klass(sub_mirror);
583 Klass* super_klass = java_lang_Class::as_Klass(super_mirror);
584 assert(sub_klass != NULL && super_klass != NULL, "invalid arguments to jni_IsAssignableFrom");
585 jboolean ret = sub_klass->is_subtype_of(super_klass) ?
586 JNI_TRUE : JNI_FALSE;
587
588 HOTSPOT_JNI_ISASSIGNABLEFROM_RETURN(ret);
589 return ret;
590 JNI_END
591
592
593 DT_RETURN_MARK_DECL(Throw, jint
594 , HOTSPOT_JNI_THROW_RETURN(_ret_ref));
595
596 JNI_ENTRY(jint, jni_Throw(JNIEnv *env, jthrowable obj))
597 JNIWrapper("Throw");
598
599 HOTSPOT_JNI_THROW_ENTRY(env, obj);
600
601 jint ret = JNI_OK;
602 DT_RETURN_MARK(Throw, jint, (const jint&)ret);
603
604 THROW_OOP_(JNIHandles::resolve(obj), JNI_OK);
605 ShouldNotReachHere();
606 return 0; // Mute compiler.
607 JNI_END
608
609
610 DT_RETURN_MARK_DECL(ThrowNew, jint
611 , HOTSPOT_JNI_THROWNEW_RETURN(_ret_ref));
612
613 JNI_ENTRY(jint, jni_ThrowNew(JNIEnv *env, jclass clazz, const char *message))
614 JNIWrapper("ThrowNew");
615
616 HOTSPOT_JNI_THROWNEW_ENTRY(env, clazz, (char *) message);
617
618 jint ret = JNI_OK;
619 DT_RETURN_MARK(ThrowNew, jint, (const jint&)ret);
620
621 InstanceKlass* k = InstanceKlass::cast(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz)));
622 Symbol* name = k->name();
623 Handle class_loader (THREAD, k->class_loader());
624 Handle protection_domain (THREAD, k->protection_domain());
625 THROW_MSG_LOADER_(name, (char *)message, class_loader, protection_domain, JNI_OK);
626 ShouldNotReachHere();
627 return 0; // Mute compiler.
628 JNI_END
629
630
631 // JNI functions only transform a pending async exception to a synchronous
632 // exception in ExceptionOccurred and ExceptionCheck calls, since
633 // delivering an async exception in other places won't change the native
634 // code's control flow and would be harmful when native code further calls
635 // JNI functions with a pending exception. Async exception is also checked
636 // during the call, so ExceptionOccurred/ExceptionCheck won't return
637 // false but deliver the async exception at the very end during
638 // state transition.
639
640 static void jni_check_async_exceptions(JavaThread *thread) {
641 assert(thread == Thread::current(), "must be itself");
642 thread->check_and_handle_async_exceptions();
643 }
644
645 JNI_ENTRY_NO_PRESERVE(jthrowable, jni_ExceptionOccurred(JNIEnv *env))
646 JNIWrapper("ExceptionOccurred");
647
648 HOTSPOT_JNI_EXCEPTIONOCCURRED_ENTRY(env);
649
650 jni_check_async_exceptions(thread);
651 oop exception = thread->pending_exception();
652 jthrowable ret = (jthrowable) JNIHandles::make_local(env, exception);
653
654 HOTSPOT_JNI_EXCEPTIONOCCURRED_RETURN(ret);
655 return ret;
656 JNI_END
657
658
659 JNI_ENTRY_NO_PRESERVE(void, jni_ExceptionDescribe(JNIEnv *env))
660 JNIWrapper("ExceptionDescribe");
661
662 HOTSPOT_JNI_EXCEPTIONDESCRIBE_ENTRY(env);
663
664 if (thread->has_pending_exception()) {
665 Handle ex(thread, thread->pending_exception());
666 thread->clear_pending_exception();
667 if (ex->is_a(SystemDictionary::ThreadDeath_klass())) {
668 // Don't print anything if we are being killed.
669 } else {
670 jio_fprintf(defaultStream::error_stream(), "Exception ");
671 if (thread != NULL && thread->threadObj() != NULL) {
672 ResourceMark rm(THREAD);
673 jio_fprintf(defaultStream::error_stream(),
674 "in thread \"%s\" ", thread->get_thread_name());
675 }
676 if (ex->is_a(SystemDictionary::Throwable_klass())) {
677 JavaValue result(T_VOID);
678 JavaCalls::call_virtual(&result,
679 ex,
680 KlassHandle(THREAD,
681 SystemDictionary::Throwable_klass()),
682 vmSymbols::printStackTrace_name(),
683 vmSymbols::void_method_signature(),
684 THREAD);
685 // If an exception is thrown in the call it gets thrown away. Not much
686 // we can do with it. The native code that calls this, does not check
687 // for the exception - hence, it might still be in the thread when DestroyVM gets
688 // called, potentially causing a few asserts to trigger - since no pending exception
689 // is expected.
690 CLEAR_PENDING_EXCEPTION;
691 } else {
692 ResourceMark rm(THREAD);
693 jio_fprintf(defaultStream::error_stream(),
694 ". Uncaught exception of type %s.",
695 ex->klass()->external_name());
696 }
697 }
698 }
699
700 HOTSPOT_JNI_EXCEPTIONDESCRIBE_RETURN();
701 JNI_END
702
703
704 JNI_QUICK_ENTRY(void, jni_ExceptionClear(JNIEnv *env))
705 JNIWrapper("ExceptionClear");
706
707 HOTSPOT_JNI_EXCEPTIONCLEAR_ENTRY(env);
708
709 // The jni code might be using this API to clear java thrown exception.
710 // So just mark jvmti thread exception state as exception caught.
711 JvmtiThreadState *state = JavaThread::current()->jvmti_thread_state();
712 if (state != NULL && state->is_exception_detected()) {
713 state->set_exception_caught();
714 }
715 thread->clear_pending_exception();
716
717 HOTSPOT_JNI_EXCEPTIONCLEAR_RETURN();
718 JNI_END
719
720
721 JNI_ENTRY(void, jni_FatalError(JNIEnv *env, const char *msg))
722 JNIWrapper("FatalError");
723
724 HOTSPOT_JNI_FATALERROR_ENTRY(env, (char *) msg);
725
726 tty->print_cr("FATAL ERROR in native method: %s", msg);
727 thread->print_stack();
728 os::abort(); // Dump core and abort
729 JNI_END
730
731
732 JNI_ENTRY(jint, jni_PushLocalFrame(JNIEnv *env, jint capacity))
733 JNIWrapper("PushLocalFrame");
734
735 HOTSPOT_JNI_PUSHLOCALFRAME_ENTRY(env, capacity);
736
737 //%note jni_11
738 if (capacity < 0 ||
739 ((MaxJNILocalCapacity > 0) && (capacity > MaxJNILocalCapacity))) {
740 HOTSPOT_JNI_PUSHLOCALFRAME_RETURN((uint32_t)JNI_ERR);
741 return JNI_ERR;
742 }
743 JNIHandleBlock* old_handles = thread->active_handles();
744 JNIHandleBlock* new_handles = JNIHandleBlock::allocate_block(thread);
745 assert(new_handles != NULL, "should not be NULL");
746 new_handles->set_pop_frame_link(old_handles);
747 thread->set_active_handles(new_handles);
748 jint ret = JNI_OK;
749 HOTSPOT_JNI_PUSHLOCALFRAME_RETURN(ret);
750 return ret;
751 JNI_END
752
753
754 JNI_ENTRY(jobject, jni_PopLocalFrame(JNIEnv *env, jobject result))
755 JNIWrapper("PopLocalFrame");
756
757 HOTSPOT_JNI_POPLOCALFRAME_ENTRY(env, result);
758
759 //%note jni_11
760 Handle result_handle(thread, JNIHandles::resolve(result));
761 JNIHandleBlock* old_handles = thread->active_handles();
762 JNIHandleBlock* new_handles = old_handles->pop_frame_link();
763 if (new_handles != NULL) {
764 // As a sanity check we only release the handle blocks if the pop_frame_link is not NULL.
765 // This way code will still work if PopLocalFrame is called without a corresponding
766 // PushLocalFrame call. Note that we set the pop_frame_link to NULL explicitly, otherwise
767 // the release_block call will release the blocks.
768 thread->set_active_handles(new_handles);
769 old_handles->set_pop_frame_link(NULL); // clear link we won't release new_handles below
770 JNIHandleBlock::release_block(old_handles, thread); // may block
771 result = JNIHandles::make_local(thread, result_handle());
772 }
773 HOTSPOT_JNI_POPLOCALFRAME_RETURN(result);
774 return result;
775 JNI_END
776
777
778 JNI_ENTRY(jobject, jni_NewGlobalRef(JNIEnv *env, jobject ref))
779 JNIWrapper("NewGlobalRef");
780
781 HOTSPOT_JNI_NEWGLOBALREF_ENTRY(env, ref);
782
783 Handle ref_handle(thread, JNIHandles::resolve(ref));
784 jobject ret = JNIHandles::make_global(ref_handle);
785
786 HOTSPOT_JNI_NEWGLOBALREF_RETURN(ret);
787 return ret;
788 JNI_END
789
790 // Must be JNI_ENTRY (with HandleMark)
791 JNI_ENTRY_NO_PRESERVE(void, jni_DeleteGlobalRef(JNIEnv *env, jobject ref))
792 JNIWrapper("DeleteGlobalRef");
793
794 HOTSPOT_JNI_DELETEGLOBALREF_ENTRY(env, ref);
795
796 JNIHandles::destroy_global(ref);
797
798 HOTSPOT_JNI_DELETEGLOBALREF_RETURN();
799 JNI_END
800
801 JNI_QUICK_ENTRY(void, jni_DeleteLocalRef(JNIEnv *env, jobject obj))
802 JNIWrapper("DeleteLocalRef");
803
804 HOTSPOT_JNI_DELETELOCALREF_ENTRY(env, obj);
805
806 JNIHandles::destroy_local(obj);
807
808 HOTSPOT_JNI_DELETELOCALREF_RETURN();
809 JNI_END
810
811 JNI_QUICK_ENTRY(jboolean, jni_IsSameObject(JNIEnv *env, jobject r1, jobject r2))
812 JNIWrapper("IsSameObject");
813
814 HOTSPOT_JNI_ISSAMEOBJECT_ENTRY(env, r1, r2);
815
816 oop a = JNIHandles::resolve(r1);
817 oop b = JNIHandles::resolve(r2);
818 jboolean ret = (a == b) ? JNI_TRUE : JNI_FALSE;
819
820 HOTSPOT_JNI_ISSAMEOBJECT_RETURN(ret);
821 return ret;
822 JNI_END
823
824
825 JNI_ENTRY(jobject, jni_NewLocalRef(JNIEnv *env, jobject ref))
826 JNIWrapper("NewLocalRef");
827
828 HOTSPOT_JNI_NEWLOCALREF_ENTRY(env, ref);
829
830 jobject ret = JNIHandles::make_local(env, JNIHandles::resolve(ref));
831
832 HOTSPOT_JNI_NEWLOCALREF_RETURN(ret);
833 return ret;
834 JNI_END
835
836 JNI_LEAF(jint, jni_EnsureLocalCapacity(JNIEnv *env, jint capacity))
837 JNIWrapper("EnsureLocalCapacity");
838
839 HOTSPOT_JNI_ENSURELOCALCAPACITY_ENTRY(env, capacity);
840
841 jint ret;
842 if (capacity >= 0 &&
843 ((MaxJNILocalCapacity <= 0) || (capacity <= MaxJNILocalCapacity))) {
844 ret = JNI_OK;
845 } else {
846 ret = JNI_ERR;
847 }
848
849 HOTSPOT_JNI_ENSURELOCALCAPACITY_RETURN(ret);
850 return ret;
851 JNI_END
852
853 // Return the Handle Type
854 JNI_LEAF(jobjectRefType, jni_GetObjectRefType(JNIEnv *env, jobject obj))
855 JNIWrapper("GetObjectRefType");
856
857 HOTSPOT_JNI_GETOBJECTREFTYPE_ENTRY(env, obj);
858
859 jobjectRefType ret;
860 if (JNIHandles::is_local_handle(thread, obj) ||
861 JNIHandles::is_frame_handle(thread, obj))
862 ret = JNILocalRefType;
863 else if (JNIHandles::is_global_handle(obj))
864 ret = JNIGlobalRefType;
865 else if (JNIHandles::is_weak_global_handle(obj))
866 ret = JNIWeakGlobalRefType;
867 else
868 ret = JNIInvalidRefType;
869
870 HOTSPOT_JNI_GETOBJECTREFTYPE_RETURN((void *) ret);
871 return ret;
872 JNI_END
873
874
875 class JNI_ArgumentPusher : public SignatureIterator {
876 protected:
877 JavaCallArguments* _arguments;
878
879 virtual void get_bool () = 0;
880 virtual void get_char () = 0;
881 virtual void get_short () = 0;
882 virtual void get_byte () = 0;
883 virtual void get_int () = 0;
884 virtual void get_long () = 0;
885 virtual void get_float () = 0;
886 virtual void get_double () = 0;
887 virtual void get_object () = 0;
888
889 JNI_ArgumentPusher(Symbol* signature) : SignatureIterator(signature) {
890 this->_return_type = T_ILLEGAL;
891 _arguments = NULL;
892 }
893
894 public:
895 virtual void iterate( uint64_t fingerprint ) = 0;
896
897 void set_java_argument_object(JavaCallArguments *arguments) { _arguments = arguments; }
898
899 inline void do_bool() { if (!is_return_type()) get_bool(); }
900 inline void do_char() { if (!is_return_type()) get_char(); }
901 inline void do_short() { if (!is_return_type()) get_short(); }
902 inline void do_byte() { if (!is_return_type()) get_byte(); }
903 inline void do_int() { if (!is_return_type()) get_int(); }
904 inline void do_long() { if (!is_return_type()) get_long(); }
905 inline void do_float() { if (!is_return_type()) get_float(); }
906 inline void do_double() { if (!is_return_type()) get_double(); }
907 inline void do_object(int begin, int end) { if (!is_return_type()) get_object(); }
908 inline void do_array(int begin, int end) { if (!is_return_type()) get_object(); } // do_array uses get_object -- there is no get_array
909 inline void do_void() { }
910
911 JavaCallArguments* arguments() { return _arguments; }
912 void push_receiver(Handle h) { _arguments->push_oop(h); }
913 };
914
915
916 class JNI_ArgumentPusherVaArg : public JNI_ArgumentPusher {
917 protected:
918 va_list _ap;
919
920 inline void get_bool() { _arguments->push_int(va_arg(_ap, jint)); } // bool is coerced to int when using va_arg
921 inline void get_char() { _arguments->push_int(va_arg(_ap, jint)); } // char is coerced to int when using va_arg
922 inline void get_short() { _arguments->push_int(va_arg(_ap, jint)); } // short is coerced to int when using va_arg
923 inline void get_byte() { _arguments->push_int(va_arg(_ap, jint)); } // byte is coerced to int when using va_arg
924 inline void get_int() { _arguments->push_int(va_arg(_ap, jint)); }
925
926 // each of these paths is exercized by the various jck Call[Static,Nonvirtual,][Void,Int,..]Method[A,V,] tests
927
928 inline void get_long() { _arguments->push_long(va_arg(_ap, jlong)); }
929 inline void get_float() { _arguments->push_float((jfloat)va_arg(_ap, jdouble)); } // float is coerced to double w/ va_arg
930 inline void get_double() { _arguments->push_double(va_arg(_ap, jdouble)); }
931 inline void get_object() { jobject l = va_arg(_ap, jobject);
932 _arguments->push_oop(Handle((oop *)l, false)); }
933
934 inline void set_ap(va_list rap) {
935 va_copy(_ap, rap);
936 }
937
938 public:
939 JNI_ArgumentPusherVaArg(Symbol* signature, va_list rap)
940 : JNI_ArgumentPusher(signature) {
941 set_ap(rap);
942 }
943 JNI_ArgumentPusherVaArg(jmethodID method_id, va_list rap)
944 : JNI_ArgumentPusher(Method::resolve_jmethod_id(method_id)->signature()) {
945 set_ap(rap);
946 }
947
948 // Optimized path if we have the bitvector form of signature
949 void iterate( uint64_t fingerprint ) {
950 if (fingerprint == (uint64_t)CONST64(-1)) {
951 SignatureIterator::iterate(); // Must be too many arguments
952 } else {
953 _return_type = (BasicType)((fingerprint >> static_feature_size) &
954 result_feature_mask);
955
956 assert(fingerprint, "Fingerprint should not be 0");
957 fingerprint = fingerprint >> (static_feature_size + result_feature_size);
958 while ( 1 ) {
959 switch ( fingerprint & parameter_feature_mask ) {
960 case bool_parm:
961 case char_parm:
962 case short_parm:
963 case byte_parm:
964 case int_parm:
965 get_int();
966 break;
967 case obj_parm:
968 get_object();
969 break;
970 case long_parm:
971 get_long();
972 break;
973 case float_parm:
974 get_float();
975 break;
976 case double_parm:
977 get_double();
978 break;
979 case done_parm:
980 return;
981 break;
982 default:
983 ShouldNotReachHere();
984 break;
985 }
986 fingerprint >>= parameter_feature_size;
987 }
988 }
989 }
990 };
991
992
993 class JNI_ArgumentPusherArray : public JNI_ArgumentPusher {
994 protected:
995 const jvalue *_ap;
996
997 inline void get_bool() { _arguments->push_int((jint)(_ap++)->z); }
998 inline void get_char() { _arguments->push_int((jint)(_ap++)->c); }
999 inline void get_short() { _arguments->push_int((jint)(_ap++)->s); }
1000 inline void get_byte() { _arguments->push_int((jint)(_ap++)->b); }
1001 inline void get_int() { _arguments->push_int((jint)(_ap++)->i); }
1002
1003 inline void get_long() { _arguments->push_long((_ap++)->j); }
1004 inline void get_float() { _arguments->push_float((_ap++)->f); }
1005 inline void get_double() { _arguments->push_double((_ap++)->d);}
1006 inline void get_object() { _arguments->push_oop(Handle((oop *)(_ap++)->l, false)); }
1007
1008 inline void set_ap(const jvalue *rap) { _ap = rap; }
1009
1010 public:
1011 JNI_ArgumentPusherArray(Symbol* signature, const jvalue *rap)
1012 : JNI_ArgumentPusher(signature) {
1013 set_ap(rap);
1014 }
1015 JNI_ArgumentPusherArray(jmethodID method_id, const jvalue *rap)
1016 : JNI_ArgumentPusher(Method::resolve_jmethod_id(method_id)->signature()) {
1017 set_ap(rap);
1018 }
1019
1020 // Optimized path if we have the bitvector form of signature
1021 void iterate( uint64_t fingerprint ) {
1022 if (fingerprint == (uint64_t)CONST64(-1)) {
1023 SignatureIterator::iterate(); // Must be too many arguments
1024 } else {
1025 _return_type = (BasicType)((fingerprint >> static_feature_size) &
1026 result_feature_mask);
1027 assert(fingerprint, "Fingerprint should not be 0");
1028 fingerprint = fingerprint >> (static_feature_size + result_feature_size);
1029 while ( 1 ) {
1030 switch ( fingerprint & parameter_feature_mask ) {
1031 case bool_parm:
1032 get_bool();
1033 break;
1034 case char_parm:
1035 get_char();
1036 break;
1037 case short_parm:
1038 get_short();
1039 break;
1040 case byte_parm:
1041 get_byte();
1042 break;
1043 case int_parm:
1044 get_int();
1045 break;
1046 case obj_parm:
1047 get_object();
1048 break;
1049 case long_parm:
1050 get_long();
1051 break;
1052 case float_parm:
1053 get_float();
1054 break;
1055 case double_parm:
1056 get_double();
1057 break;
1058 case done_parm:
1059 return;
1060 break;
1061 default:
1062 ShouldNotReachHere();
1063 break;
1064 }
1065 fingerprint >>= parameter_feature_size;
1066 }
1067 }
1068 }
1069 };
1070
1071
1072 enum JNICallType {
1073 JNI_STATIC,
1074 JNI_VIRTUAL,
1075 JNI_NONVIRTUAL
1076 };
1077
1078
1079
1080 static void jni_invoke_static(JNIEnv *env, JavaValue* result, jobject receiver, JNICallType call_type, jmethodID method_id, JNI_ArgumentPusher *args, TRAPS) {
1081 methodHandle method(THREAD, Method::resolve_jmethod_id(method_id));
1082
1083 // Create object to hold arguments for the JavaCall, and associate it with
1084 // the jni parser
1085 ResourceMark rm(THREAD);
1086 int number_of_parameters = method->size_of_parameters();
1087 JavaCallArguments java_args(number_of_parameters);
1088 args->set_java_argument_object(&java_args);
1089
1090 assert(method->is_static(), "method should be static");
1091
1092 // Fill out JavaCallArguments object
1093 args->iterate( Fingerprinter(method).fingerprint() );
1094 // Initialize result type
1095 result->set_type(args->get_ret_type());
1096
1097 // Invoke the method. Result is returned as oop.
1098 JavaCalls::call(result, method, &java_args, CHECK);
1099
1100 // Convert result
1101 if (result->get_type() == T_OBJECT || result->get_type() == T_ARRAY) {
1102 result->set_jobject(JNIHandles::make_local(env, (oop) result->get_jobject()));
1103 }
1104 }
1105
1106
1107 static void jni_invoke_nonstatic(JNIEnv *env, JavaValue* result, jobject receiver, JNICallType call_type, jmethodID method_id, JNI_ArgumentPusher *args, TRAPS) {
1108 oop recv = JNIHandles::resolve(receiver);
1109 if (recv == NULL) {
1110 THROW(vmSymbols::java_lang_NullPointerException());
1111 }
1112 Handle h_recv(THREAD, recv);
1113
1114 int number_of_parameters;
1115 Method* selected_method;
1116 {
1117 Method* m = Method::resolve_jmethod_id(method_id);
1118 number_of_parameters = m->size_of_parameters();
1119 Klass* holder = m->method_holder();
1120 if (call_type != JNI_VIRTUAL) {
1121 selected_method = m;
1122 } else if (!m->has_itable_index()) {
1123 // non-interface call -- for that little speed boost, don't handlize
1124 debug_only(NoSafepointVerifier nosafepoint;)
1125 // jni_GetMethodID makes sure class is linked and initialized
1126 // so m should have a valid vtable index.
1127 assert(m->valid_vtable_index(), "no valid vtable index");
1128 int vtbl_index = m->vtable_index();
1129 if (vtbl_index != Method::nonvirtual_vtable_index) {
1130 selected_method = h_recv->klass()->method_at_vtable(vtbl_index);
1131 } else {
1132 // final method
1133 selected_method = m;
1134 }
1135 } else {
1136 // interface call
1137 KlassHandle h_holder(THREAD, holder);
1138
1139 int itbl_index = m->itable_index();
1140 Klass* k = h_recv->klass();
1141 selected_method = InstanceKlass::cast(k)->method_at_itable(h_holder(), itbl_index, CHECK);
1142 }
1143 }
1144
1145 methodHandle method(THREAD, selected_method);
1146
1147 // Create object to hold arguments for the JavaCall, and associate it with
1148 // the jni parser
1149 ResourceMark rm(THREAD);
1150 JavaCallArguments java_args(number_of_parameters);
1151 args->set_java_argument_object(&java_args);
1152
1153 // handle arguments
1154 assert(!method->is_static(), "method should not be static");
1155 args->push_receiver(h_recv); // Push jobject handle
1156
1157 // Fill out JavaCallArguments object
1158 args->iterate( Fingerprinter(method).fingerprint() );
1159 // Initialize result type
1160 result->set_type(args->get_ret_type());
1161
1162 // Invoke the method. Result is returned as oop.
1163 JavaCalls::call(result, method, &java_args, CHECK);
1164
1165 // Convert result
1166 if (result->get_type() == T_OBJECT || result->get_type() == T_ARRAY) {
1167 result->set_jobject(JNIHandles::make_local(env, (oop) result->get_jobject()));
1168 }
1169 }
1170
1171
1172 static instanceOop alloc_object(jclass clazz, TRAPS) {
1173 KlassHandle k(THREAD, java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz)));
1174 if (k == NULL) {
1175 ResourceMark rm(THREAD);
1176 THROW_(vmSymbols::java_lang_InstantiationException(), NULL);
1177 }
1178 k()->check_valid_for_instantiation(false, CHECK_NULL);
1179 InstanceKlass::cast(k())->initialize(CHECK_NULL);
1180 instanceOop ih = InstanceKlass::cast(k())->allocate_instance(THREAD);
1181 return ih;
1182 }
1183
1184 DT_RETURN_MARK_DECL(AllocObject, jobject
1185 , HOTSPOT_JNI_ALLOCOBJECT_RETURN(_ret_ref));
1186
1187 JNI_ENTRY(jobject, jni_AllocObject(JNIEnv *env, jclass clazz))
1188 JNIWrapper("AllocObject");
1189
1190 HOTSPOT_JNI_ALLOCOBJECT_ENTRY(env, clazz);
1191
1192 jobject ret = NULL;
1193 DT_RETURN_MARK(AllocObject, jobject, (const jobject&)ret);
1194
1195 instanceOop i = alloc_object(clazz, CHECK_NULL);
1196 ret = JNIHandles::make_local(env, i);
1197 return ret;
1198 JNI_END
1199
1200 DT_RETURN_MARK_DECL(NewObjectA, jobject
1201 , HOTSPOT_JNI_NEWOBJECTA_RETURN(_ret_ref));
1202
1203 JNI_ENTRY(jobject, jni_NewObjectA(JNIEnv *env, jclass clazz, jmethodID methodID, const jvalue *args))
1204 JNIWrapper("NewObjectA");
1205
1206 HOTSPOT_JNI_NEWOBJECTA_ENTRY(env, clazz, (uintptr_t) methodID);
1207
1208 jobject obj = NULL;
1209 DT_RETURN_MARK(NewObjectA, jobject, (const jobject)obj);
1210
1211 instanceOop i = alloc_object(clazz, CHECK_NULL);
1212 obj = JNIHandles::make_local(env, i);
1213 JavaValue jvalue(T_VOID);
1214 JNI_ArgumentPusherArray ap(methodID, args);
1215 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_NULL);
1216 return obj;
1217 JNI_END
1218
1219
1220 DT_RETURN_MARK_DECL(NewObjectV, jobject
1221 , HOTSPOT_JNI_NEWOBJECTV_RETURN(_ret_ref));
1222
1223 JNI_ENTRY(jobject, jni_NewObjectV(JNIEnv *env, jclass clazz, jmethodID methodID, va_list args))
1224 JNIWrapper("NewObjectV");
1225
1226 HOTSPOT_JNI_NEWOBJECTV_ENTRY(env, clazz, (uintptr_t) methodID);
1227
1228 jobject obj = NULL;
1229 DT_RETURN_MARK(NewObjectV, jobject, (const jobject&)obj);
1230
1231 instanceOop i = alloc_object(clazz, CHECK_NULL);
1232 obj = JNIHandles::make_local(env, i);
1233 JavaValue jvalue(T_VOID);
1234 JNI_ArgumentPusherVaArg ap(methodID, args);
1235 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_NULL);
1236 return obj;
1237 JNI_END
1238
1239
1240 DT_RETURN_MARK_DECL(NewObject, jobject
1241 , HOTSPOT_JNI_NEWOBJECT_RETURN(_ret_ref));
1242
1243 JNI_ENTRY(jobject, jni_NewObject(JNIEnv *env, jclass clazz, jmethodID methodID, ...))
1244 JNIWrapper("NewObject");
1245
1246 HOTSPOT_JNI_NEWOBJECT_ENTRY(env, clazz, (uintptr_t) methodID);
1247
1248 jobject obj = NULL;
1249 DT_RETURN_MARK(NewObject, jobject, (const jobject&)obj);
1250
1251 instanceOop i = alloc_object(clazz, CHECK_NULL);
1252 obj = JNIHandles::make_local(env, i);
1253 va_list args;
1254 va_start(args, methodID);
1255 JavaValue jvalue(T_VOID);
1256 JNI_ArgumentPusherVaArg ap(methodID, args);
1257 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_NULL);
1258 va_end(args);
1259 return obj;
1260 JNI_END
1261
1262
1263 JNI_ENTRY(jclass, jni_GetObjectClass(JNIEnv *env, jobject obj))
1264 JNIWrapper("GetObjectClass");
1265
1266 HOTSPOT_JNI_GETOBJECTCLASS_ENTRY(env, obj);
1267
1268 Klass* k = JNIHandles::resolve_non_null(obj)->klass();
1269 jclass ret =
1270 (jclass) JNIHandles::make_local(env, k->java_mirror());
1271
1272 HOTSPOT_JNI_GETOBJECTCLASS_RETURN(ret);
1273 return ret;
1274 JNI_END
1275
1276 JNI_QUICK_ENTRY(jboolean, jni_IsInstanceOf(JNIEnv *env, jobject obj, jclass clazz))
1277 JNIWrapper("IsInstanceOf");
1278
1279 HOTSPOT_JNI_ISINSTANCEOF_ENTRY(env, obj, clazz);
1280
1281 jboolean ret = JNI_TRUE;
1282 if (obj != NULL) {
1283 ret = JNI_FALSE;
1284 Klass* k = java_lang_Class::as_Klass(
1285 JNIHandles::resolve_non_null(clazz));
1286 if (k != NULL) {
1287 ret = JNIHandles::resolve_non_null(obj)->is_a(k) ? JNI_TRUE : JNI_FALSE;
1288 }
1289 }
1290
1291 HOTSPOT_JNI_ISINSTANCEOF_RETURN(ret);
1292 return ret;
1293 JNI_END
1294
1295
1296 static jmethodID get_method_id(JNIEnv *env, jclass clazz, const char *name_str,
1297 const char *sig, bool is_static, TRAPS) {
1298 // %%%% This code should probably just call into a method in the LinkResolver
1299 //
1300 // The class should have been loaded (we have an instance of the class
1301 // passed in) so the method and signature should already be in the symbol
1302 // table. If they're not there, the method doesn't exist.
1303 const char *name_to_probe = (name_str == NULL)
1304 ? vmSymbols::object_initializer_name()->as_C_string()
1305 : name_str;
1306 TempNewSymbol name = SymbolTable::probe(name_to_probe, (int)strlen(name_to_probe));
1307 TempNewSymbol signature = SymbolTable::probe(sig, (int)strlen(sig));
1308
1309 if (name == NULL || signature == NULL) {
1310 THROW_MSG_0(vmSymbols::java_lang_NoSuchMethodError(), name_str);
1311 }
1312
1313 // Throw a NoSuchMethodError exception if we have an instance of a
1314 // primitive java.lang.Class
1315 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(clazz))) {
1316 THROW_MSG_0(vmSymbols::java_lang_NoSuchMethodError(), name_str);
1317 }
1318
1319 KlassHandle klass(THREAD,
1320 java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz)));
1321
1322 // Make sure class is linked and initialized before handing id's out to
1323 // Method*s.
1324 klass()->initialize(CHECK_NULL);
1325
1326 Method* m;
1327 if (name == vmSymbols::object_initializer_name() ||
1328 name == vmSymbols::class_initializer_name()) {
1329 // Never search superclasses for constructors
1330 if (klass->is_instance_klass()) {
1331 m = InstanceKlass::cast(klass())->find_method(name, signature);
1332 } else {
1333 m = NULL;
1334 }
1335 } else {
1336 m = klass->lookup_method(name, signature);
1337 if (m == NULL && klass->is_instance_klass()) {
1338 m = InstanceKlass::cast(klass())->lookup_method_in_ordered_interfaces(name, signature);
1339 }
1340 }
1341 if (m == NULL || (m->is_static() != is_static)) {
1342 THROW_MSG_0(vmSymbols::java_lang_NoSuchMethodError(), name_str);
1343 }
1344 return m->jmethod_id();
1345 }
1346
1347
1348 JNI_ENTRY(jmethodID, jni_GetMethodID(JNIEnv *env, jclass clazz,
1349 const char *name, const char *sig))
1350 JNIWrapper("GetMethodID");
1351 HOTSPOT_JNI_GETMETHODID_ENTRY(env, clazz, (char *) name, (char *) sig);
1352 jmethodID ret = get_method_id(env, clazz, name, sig, false, thread);
1353 HOTSPOT_JNI_GETMETHODID_RETURN((uintptr_t) ret);
1354 return ret;
1355 JNI_END
1356
1357
1358 JNI_ENTRY(jmethodID, jni_GetStaticMethodID(JNIEnv *env, jclass clazz,
1359 const char *name, const char *sig))
1360 JNIWrapper("GetStaticMethodID");
1361 HOTSPOT_JNI_GETSTATICMETHODID_ENTRY(env, (char *) clazz, (char *) name, (char *)sig);
1362 jmethodID ret = get_method_id(env, clazz, name, sig, true, thread);
1363 HOTSPOT_JNI_GETSTATICMETHODID_RETURN((uintptr_t) ret);
1364 return ret;
1365 JNI_END
1366
1367
1368
1369 //
1370 // Calling Methods
1371 //
1372
1373
1374 #define DEFINE_CALLMETHOD(ResultType, Result, Tag \
1375 , EntryProbe, ReturnProbe) \
1376 \
1377 DT_RETURN_MARK_DECL_FOR(Result, Call##Result##Method, ResultType \
1378 , ReturnProbe); \
1379 \
1380 JNI_ENTRY(ResultType, \
1381 jni_Call##Result##Method(JNIEnv *env, jobject obj, jmethodID methodID, ...)) \
1382 JNIWrapper("Call" XSTR(Result) "Method"); \
1383 \
1384 EntryProbe; \
1385 ResultType ret = 0;\
1386 DT_RETURN_MARK_FOR(Result, Call##Result##Method, ResultType, \
1387 (const ResultType&)ret);\
1388 \
1389 va_list args; \
1390 va_start(args, methodID); \
1391 JavaValue jvalue(Tag); \
1392 JNI_ArgumentPusherVaArg ap(methodID, args); \
1393 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK_0); \
1394 va_end(args); \
1395 ret = jvalue.get_##ResultType(); \
1396 return ret;\
1397 JNI_END
1398
1399 // the runtime type of subword integral basic types is integer
1400 DEFINE_CALLMETHOD(jboolean, Boolean, T_BOOLEAN
1401 , HOTSPOT_JNI_CALLBOOLEANMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1402 HOTSPOT_JNI_CALLBOOLEANMETHOD_RETURN(_ret_ref))
1403 DEFINE_CALLMETHOD(jbyte, Byte, T_BYTE
1404 , HOTSPOT_JNI_CALLBYTEMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1405 HOTSPOT_JNI_CALLBYTEMETHOD_RETURN(_ret_ref))
1406 DEFINE_CALLMETHOD(jchar, Char, T_CHAR
1407 , HOTSPOT_JNI_CALLCHARMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1408 HOTSPOT_JNI_CALLCHARMETHOD_RETURN(_ret_ref))
1409 DEFINE_CALLMETHOD(jshort, Short, T_SHORT
1410 , HOTSPOT_JNI_CALLSHORTMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1411 HOTSPOT_JNI_CALLSHORTMETHOD_RETURN(_ret_ref))
1412
1413 DEFINE_CALLMETHOD(jobject, Object, T_OBJECT
1414 , HOTSPOT_JNI_CALLOBJECTMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1415 HOTSPOT_JNI_CALLOBJECTMETHOD_RETURN(_ret_ref))
1416 DEFINE_CALLMETHOD(jint, Int, T_INT,
1417 HOTSPOT_JNI_CALLINTMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1418 HOTSPOT_JNI_CALLINTMETHOD_RETURN(_ret_ref))
1419 DEFINE_CALLMETHOD(jlong, Long, T_LONG
1420 , HOTSPOT_JNI_CALLLONGMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1421 HOTSPOT_JNI_CALLLONGMETHOD_RETURN(_ret_ref))
1422 // Float and double probes don't return value because dtrace doesn't currently support it
1423 DEFINE_CALLMETHOD(jfloat, Float, T_FLOAT
1424 , HOTSPOT_JNI_CALLFLOATMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1425 HOTSPOT_JNI_CALLFLOATMETHOD_RETURN())
1426 DEFINE_CALLMETHOD(jdouble, Double, T_DOUBLE
1427 , HOTSPOT_JNI_CALLDOUBLEMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1428 HOTSPOT_JNI_CALLDOUBLEMETHOD_RETURN())
1429
1430 #define DEFINE_CALLMETHODV(ResultType, Result, Tag \
1431 , EntryProbe, ReturnProbe) \
1432 \
1433 DT_RETURN_MARK_DECL_FOR(Result, Call##Result##MethodV, ResultType \
1434 , ReturnProbe); \
1435 \
1436 JNI_ENTRY(ResultType, \
1437 jni_Call##Result##MethodV(JNIEnv *env, jobject obj, jmethodID methodID, va_list args)) \
1438 JNIWrapper("Call" XSTR(Result) "MethodV"); \
1439 \
1440 EntryProbe;\
1441 ResultType ret = 0;\
1442 DT_RETURN_MARK_FOR(Result, Call##Result##MethodV, ResultType, \
1443 (const ResultType&)ret);\
1444 \
1445 JavaValue jvalue(Tag); \
1446 JNI_ArgumentPusherVaArg ap(methodID, args); \
1447 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK_0); \
1448 ret = jvalue.get_##ResultType(); \
1449 return ret;\
1450 JNI_END
1451
1452 // the runtime type of subword integral basic types is integer
1453 DEFINE_CALLMETHODV(jboolean, Boolean, T_BOOLEAN
1454 , HOTSPOT_JNI_CALLBOOLEANMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1455 HOTSPOT_JNI_CALLBOOLEANMETHODV_RETURN(_ret_ref))
1456 DEFINE_CALLMETHODV(jbyte, Byte, T_BYTE
1457 , HOTSPOT_JNI_CALLBYTEMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1458 HOTSPOT_JNI_CALLBYTEMETHODV_RETURN(_ret_ref))
1459 DEFINE_CALLMETHODV(jchar, Char, T_CHAR
1460 , HOTSPOT_JNI_CALLCHARMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1461 HOTSPOT_JNI_CALLCHARMETHODV_RETURN(_ret_ref))
1462 DEFINE_CALLMETHODV(jshort, Short, T_SHORT
1463 , HOTSPOT_JNI_CALLSHORTMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1464 HOTSPOT_JNI_CALLSHORTMETHODV_RETURN(_ret_ref))
1465
1466 DEFINE_CALLMETHODV(jobject, Object, T_OBJECT
1467 , HOTSPOT_JNI_CALLOBJECTMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1468 HOTSPOT_JNI_CALLOBJECTMETHODV_RETURN(_ret_ref))
1469 DEFINE_CALLMETHODV(jint, Int, T_INT,
1470 HOTSPOT_JNI_CALLINTMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1471 HOTSPOT_JNI_CALLINTMETHODV_RETURN(_ret_ref))
1472 DEFINE_CALLMETHODV(jlong, Long, T_LONG
1473 , HOTSPOT_JNI_CALLLONGMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1474 HOTSPOT_JNI_CALLLONGMETHODV_RETURN(_ret_ref))
1475 // Float and double probes don't return value because dtrace doesn't currently support it
1476 DEFINE_CALLMETHODV(jfloat, Float, T_FLOAT
1477 , HOTSPOT_JNI_CALLFLOATMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1478 HOTSPOT_JNI_CALLFLOATMETHODV_RETURN())
1479 DEFINE_CALLMETHODV(jdouble, Double, T_DOUBLE
1480 , HOTSPOT_JNI_CALLDOUBLEMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1481 HOTSPOT_JNI_CALLDOUBLEMETHODV_RETURN())
1482
1483 #define DEFINE_CALLMETHODA(ResultType, Result, Tag \
1484 , EntryProbe, ReturnProbe) \
1485 \
1486 DT_RETURN_MARK_DECL_FOR(Result, Call##Result##MethodA, ResultType \
1487 , ReturnProbe); \
1488 \
1489 JNI_ENTRY(ResultType, \
1490 jni_Call##Result##MethodA(JNIEnv *env, jobject obj, jmethodID methodID, const jvalue *args)) \
1491 JNIWrapper("Call" XSTR(Result) "MethodA"); \
1492 EntryProbe; \
1493 ResultType ret = 0;\
1494 DT_RETURN_MARK_FOR(Result, Call##Result##MethodA, ResultType, \
1495 (const ResultType&)ret);\
1496 \
1497 JavaValue jvalue(Tag); \
1498 JNI_ArgumentPusherArray ap(methodID, args); \
1499 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK_0); \
1500 ret = jvalue.get_##ResultType(); \
1501 return ret;\
1502 JNI_END
1503
1504 // the runtime type of subword integral basic types is integer
1505 DEFINE_CALLMETHODA(jboolean, Boolean, T_BOOLEAN
1506 , HOTSPOT_JNI_CALLBOOLEANMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1507 HOTSPOT_JNI_CALLBOOLEANMETHODA_RETURN(_ret_ref))
1508 DEFINE_CALLMETHODA(jbyte, Byte, T_BYTE
1509 , HOTSPOT_JNI_CALLBYTEMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1510 HOTSPOT_JNI_CALLBYTEMETHODA_RETURN(_ret_ref))
1511 DEFINE_CALLMETHODA(jchar, Char, T_CHAR
1512 , HOTSPOT_JNI_CALLCHARMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1513 HOTSPOT_JNI_CALLCHARMETHODA_RETURN(_ret_ref))
1514 DEFINE_CALLMETHODA(jshort, Short, T_SHORT
1515 , HOTSPOT_JNI_CALLSHORTMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1516 HOTSPOT_JNI_CALLSHORTMETHODA_RETURN(_ret_ref))
1517
1518 DEFINE_CALLMETHODA(jobject, Object, T_OBJECT
1519 , HOTSPOT_JNI_CALLOBJECTMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1520 HOTSPOT_JNI_CALLOBJECTMETHODA_RETURN(_ret_ref))
1521 DEFINE_CALLMETHODA(jint, Int, T_INT,
1522 HOTSPOT_JNI_CALLINTMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1523 HOTSPOT_JNI_CALLINTMETHODA_RETURN(_ret_ref))
1524 DEFINE_CALLMETHODA(jlong, Long, T_LONG
1525 , HOTSPOT_JNI_CALLLONGMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1526 HOTSPOT_JNI_CALLLONGMETHODA_RETURN(_ret_ref))
1527 // Float and double probes don't return value because dtrace doesn't currently support it
1528 DEFINE_CALLMETHODA(jfloat, Float, T_FLOAT
1529 , HOTSPOT_JNI_CALLFLOATMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1530 HOTSPOT_JNI_CALLFLOATMETHODA_RETURN())
1531 DEFINE_CALLMETHODA(jdouble, Double, T_DOUBLE
1532 , HOTSPOT_JNI_CALLDOUBLEMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1533 HOTSPOT_JNI_CALLDOUBLEMETHODA_RETURN())
1534
1535 DT_VOID_RETURN_MARK_DECL(CallVoidMethod, HOTSPOT_JNI_CALLVOIDMETHOD_RETURN());
1536 DT_VOID_RETURN_MARK_DECL(CallVoidMethodV, HOTSPOT_JNI_CALLVOIDMETHODV_RETURN());
1537 DT_VOID_RETURN_MARK_DECL(CallVoidMethodA, HOTSPOT_JNI_CALLVOIDMETHODA_RETURN());
1538
1539
1540 JNI_ENTRY(void, jni_CallVoidMethod(JNIEnv *env, jobject obj, jmethodID methodID, ...))
1541 JNIWrapper("CallVoidMethod");
1542 HOTSPOT_JNI_CALLVOIDMETHOD_ENTRY(env, obj, (uintptr_t) methodID);
1543 DT_VOID_RETURN_MARK(CallVoidMethod);
1544
1545 va_list args;
1546 va_start(args, methodID);
1547 JavaValue jvalue(T_VOID);
1548 JNI_ArgumentPusherVaArg ap(methodID, args);
1549 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK);
1550 va_end(args);
1551 JNI_END
1552
1553
1554 JNI_ENTRY(void, jni_CallVoidMethodV(JNIEnv *env, jobject obj, jmethodID methodID, va_list args))
1555 JNIWrapper("CallVoidMethodV");
1556 HOTSPOT_JNI_CALLVOIDMETHODV_ENTRY(env, obj, (uintptr_t) methodID);
1557 DT_VOID_RETURN_MARK(CallVoidMethodV);
1558
1559 JavaValue jvalue(T_VOID);
1560 JNI_ArgumentPusherVaArg ap(methodID, args);
1561 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK);
1562 JNI_END
1563
1564
1565 JNI_ENTRY(void, jni_CallVoidMethodA(JNIEnv *env, jobject obj, jmethodID methodID, const jvalue *args))
1566 JNIWrapper("CallVoidMethodA");
1567 HOTSPOT_JNI_CALLVOIDMETHODA_ENTRY(env, obj, (uintptr_t) methodID);
1568 DT_VOID_RETURN_MARK(CallVoidMethodA);
1569
1570 JavaValue jvalue(T_VOID);
1571 JNI_ArgumentPusherArray ap(methodID, args);
1572 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK);
1573 JNI_END
1574
1575
1576
1577 #define DEFINE_CALLNONVIRTUALMETHOD(ResultType, Result, Tag \
1578 , EntryProbe, ReturnProbe) \
1579 \
1580 DT_RETURN_MARK_DECL_FOR(Result, CallNonvirtual##Result##Method, ResultType \
1581 , ReturnProbe);\
1582 \
1583 JNI_ENTRY(ResultType, \
1584 jni_CallNonvirtual##Result##Method(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, ...)) \
1585 JNIWrapper("CallNonvitual" XSTR(Result) "Method"); \
1586 \
1587 EntryProbe;\
1588 ResultType ret;\
1589 DT_RETURN_MARK_FOR(Result, CallNonvirtual##Result##Method, ResultType, \
1590 (const ResultType&)ret);\
1591 \
1592 va_list args; \
1593 va_start(args, methodID); \
1594 JavaValue jvalue(Tag); \
1595 JNI_ArgumentPusherVaArg ap(methodID, args); \
1596 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_0); \
1597 va_end(args); \
1598 ret = jvalue.get_##ResultType(); \
1599 return ret;\
1600 JNI_END
1601
1602 // the runtime type of subword integral basic types is integer
1603 DEFINE_CALLNONVIRTUALMETHOD(jboolean, Boolean, T_BOOLEAN
1604 , HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1605 HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHOD_RETURN(_ret_ref))
1606 DEFINE_CALLNONVIRTUALMETHOD(jbyte, Byte, T_BYTE
1607 , HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1608 HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHOD_RETURN(_ret_ref))
1609 DEFINE_CALLNONVIRTUALMETHOD(jchar, Char, T_CHAR
1610 , HOTSPOT_JNI_CALLNONVIRTUALCHARMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1611 HOTSPOT_JNI_CALLNONVIRTUALCHARMETHOD_RETURN(_ret_ref))
1612 DEFINE_CALLNONVIRTUALMETHOD(jshort, Short, T_SHORT
1613 , HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1614 HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHOD_RETURN(_ret_ref))
1615
1616 DEFINE_CALLNONVIRTUALMETHOD(jobject, Object, T_OBJECT
1617 , HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1618 HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHOD_RETURN(_ret_ref))
1619 DEFINE_CALLNONVIRTUALMETHOD(jint, Int, T_INT
1620 , HOTSPOT_JNI_CALLNONVIRTUALINTMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1621 HOTSPOT_JNI_CALLNONVIRTUALINTMETHOD_RETURN(_ret_ref))
1622 DEFINE_CALLNONVIRTUALMETHOD(jlong, Long, T_LONG
1623 , HOTSPOT_JNI_CALLNONVIRTUALLONGMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1624 // Float and double probes don't return value because dtrace doesn't currently support it
1625 HOTSPOT_JNI_CALLNONVIRTUALLONGMETHOD_RETURN(_ret_ref))
1626 DEFINE_CALLNONVIRTUALMETHOD(jfloat, Float, T_FLOAT
1627 , HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1628 HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHOD_RETURN())
1629 DEFINE_CALLNONVIRTUALMETHOD(jdouble, Double, T_DOUBLE
1630 , HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1631 HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHOD_RETURN())
1632
1633 #define DEFINE_CALLNONVIRTUALMETHODV(ResultType, Result, Tag \
1634 , EntryProbe, ReturnProbe) \
1635 \
1636 DT_RETURN_MARK_DECL_FOR(Result, CallNonvirtual##Result##MethodV, ResultType \
1637 , ReturnProbe);\
1638 \
1639 JNI_ENTRY(ResultType, \
1640 jni_CallNonvirtual##Result##MethodV(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, va_list args)) \
1641 JNIWrapper("CallNonvitual" XSTR(Result) "MethodV"); \
1642 \
1643 EntryProbe;\
1644 ResultType ret;\
1645 DT_RETURN_MARK_FOR(Result, CallNonvirtual##Result##MethodV, ResultType, \
1646 (const ResultType&)ret);\
1647 \
1648 JavaValue jvalue(Tag); \
1649 JNI_ArgumentPusherVaArg ap(methodID, args); \
1650 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_0); \
1651 ret = jvalue.get_##ResultType(); \
1652 return ret;\
1653 JNI_END
1654
1655 // the runtime type of subword integral basic types is integer
1656 DEFINE_CALLNONVIRTUALMETHODV(jboolean, Boolean, T_BOOLEAN
1657 , HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1658 HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHODV_RETURN(_ret_ref))
1659 DEFINE_CALLNONVIRTUALMETHODV(jbyte, Byte, T_BYTE
1660 , HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1661 HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHODV_RETURN(_ret_ref))
1662 DEFINE_CALLNONVIRTUALMETHODV(jchar, Char, T_CHAR
1663 , HOTSPOT_JNI_CALLNONVIRTUALCHARMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1664 HOTSPOT_JNI_CALLNONVIRTUALCHARMETHODV_RETURN(_ret_ref))
1665 DEFINE_CALLNONVIRTUALMETHODV(jshort, Short, T_SHORT
1666 , HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1667 HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHODV_RETURN(_ret_ref))
1668
1669 DEFINE_CALLNONVIRTUALMETHODV(jobject, Object, T_OBJECT
1670 , HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1671 HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHODV_RETURN(_ret_ref))
1672 DEFINE_CALLNONVIRTUALMETHODV(jint, Int, T_INT
1673 , HOTSPOT_JNI_CALLNONVIRTUALINTMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1674 HOTSPOT_JNI_CALLNONVIRTUALINTMETHODV_RETURN(_ret_ref))
1675 DEFINE_CALLNONVIRTUALMETHODV(jlong, Long, T_LONG
1676 , HOTSPOT_JNI_CALLNONVIRTUALLONGMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1677 // Float and double probes don't return value because dtrace doesn't currently support it
1678 HOTSPOT_JNI_CALLNONVIRTUALLONGMETHODV_RETURN(_ret_ref))
1679 DEFINE_CALLNONVIRTUALMETHODV(jfloat, Float, T_FLOAT
1680 , HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1681 HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHODV_RETURN())
1682 DEFINE_CALLNONVIRTUALMETHODV(jdouble, Double, T_DOUBLE
1683 , HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1684 HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHODV_RETURN())
1685
1686 #define DEFINE_CALLNONVIRTUALMETHODA(ResultType, Result, Tag \
1687 , EntryProbe, ReturnProbe) \
1688 \
1689 DT_RETURN_MARK_DECL_FOR(Result, CallNonvirtual##Result##MethodA, ResultType \
1690 , ReturnProbe);\
1691 \
1692 JNI_ENTRY(ResultType, \
1693 jni_CallNonvirtual##Result##MethodA(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, const jvalue *args)) \
1694 JNIWrapper("CallNonvitual" XSTR(Result) "MethodA"); \
1695 \
1696 EntryProbe;\
1697 ResultType ret;\
1698 DT_RETURN_MARK_FOR(Result, CallNonvirtual##Result##MethodA, ResultType, \
1699 (const ResultType&)ret);\
1700 \
1701 JavaValue jvalue(Tag); \
1702 JNI_ArgumentPusherArray ap(methodID, args); \
1703 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_0); \
1704 ret = jvalue.get_##ResultType(); \
1705 return ret;\
1706 JNI_END
1707
1708 // the runtime type of subword integral basic types is integer
1709 DEFINE_CALLNONVIRTUALMETHODA(jboolean, Boolean, T_BOOLEAN
1710 , HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1711 HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHODA_RETURN(_ret_ref))
1712 DEFINE_CALLNONVIRTUALMETHODA(jbyte, Byte, T_BYTE
1713 , HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1714 HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHODA_RETURN(_ret_ref))
1715 DEFINE_CALLNONVIRTUALMETHODA(jchar, Char, T_CHAR
1716 , HOTSPOT_JNI_CALLNONVIRTUALCHARMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1717 HOTSPOT_JNI_CALLNONVIRTUALCHARMETHODA_RETURN(_ret_ref))
1718 DEFINE_CALLNONVIRTUALMETHODA(jshort, Short, T_SHORT
1719 , HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1720 HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHODA_RETURN(_ret_ref))
1721
1722 DEFINE_CALLNONVIRTUALMETHODA(jobject, Object, T_OBJECT
1723 , HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1724 HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHODA_RETURN(_ret_ref))
1725 DEFINE_CALLNONVIRTUALMETHODA(jint, Int, T_INT
1726 , HOTSPOT_JNI_CALLNONVIRTUALINTMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1727 HOTSPOT_JNI_CALLNONVIRTUALINTMETHODA_RETURN(_ret_ref))
1728 DEFINE_CALLNONVIRTUALMETHODA(jlong, Long, T_LONG
1729 , HOTSPOT_JNI_CALLNONVIRTUALLONGMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1730 // Float and double probes don't return value because dtrace doesn't currently support it
1731 HOTSPOT_JNI_CALLNONVIRTUALLONGMETHODA_RETURN(_ret_ref))
1732 DEFINE_CALLNONVIRTUALMETHODA(jfloat, Float, T_FLOAT
1733 , HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1734 HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHODA_RETURN())
1735 DEFINE_CALLNONVIRTUALMETHODA(jdouble, Double, T_DOUBLE
1736 , HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1737 HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHODA_RETURN())
1738
1739 DT_VOID_RETURN_MARK_DECL(CallNonvirtualVoidMethod
1740 , HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHOD_RETURN());
1741 DT_VOID_RETURN_MARK_DECL(CallNonvirtualVoidMethodV
1742 , HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHODV_RETURN());
1743 DT_VOID_RETURN_MARK_DECL(CallNonvirtualVoidMethodA
1744 , HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHODA_RETURN());
1745
1746 JNI_ENTRY(void, jni_CallNonvirtualVoidMethod(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, ...))
1747 JNIWrapper("CallNonvirtualVoidMethod");
1748
1749 HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHOD_ENTRY(env, obj, cls, (uintptr_t) methodID);
1750 DT_VOID_RETURN_MARK(CallNonvirtualVoidMethod);
1751
1752 va_list args;
1753 va_start(args, methodID);
1754 JavaValue jvalue(T_VOID);
1755 JNI_ArgumentPusherVaArg ap(methodID, args);
1756 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK);
1757 va_end(args);
1758 JNI_END
1759
1760
1761 JNI_ENTRY(void, jni_CallNonvirtualVoidMethodV(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, va_list args))
1762 JNIWrapper("CallNonvirtualVoidMethodV");
1763
1764 HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHODV_ENTRY(
1765 env, obj, cls, (uintptr_t) methodID);
1766 DT_VOID_RETURN_MARK(CallNonvirtualVoidMethodV);
1767
1768 JavaValue jvalue(T_VOID);
1769 JNI_ArgumentPusherVaArg ap(methodID, args);
1770 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK);
1771 JNI_END
1772
1773
1774 JNI_ENTRY(void, jni_CallNonvirtualVoidMethodA(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, const jvalue *args))
1775 JNIWrapper("CallNonvirtualVoidMethodA");
1776 HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHODA_ENTRY(
1777 env, obj, cls, (uintptr_t) methodID);
1778 DT_VOID_RETURN_MARK(CallNonvirtualVoidMethodA);
1779 JavaValue jvalue(T_VOID);
1780 JNI_ArgumentPusherArray ap(methodID, args);
1781 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK);
1782 JNI_END
1783
1784
1785
1786 #define DEFINE_CALLSTATICMETHOD(ResultType, Result, Tag \
1787 , EntryProbe, ResultProbe) \
1788 \
1789 DT_RETURN_MARK_DECL_FOR(Result, CallStatic##Result##Method, ResultType \
1790 , ResultProbe); \
1791 \
1792 JNI_ENTRY(ResultType, \
1793 jni_CallStatic##Result##Method(JNIEnv *env, jclass cls, jmethodID methodID, ...)) \
1794 JNIWrapper("CallStatic" XSTR(Result) "Method"); \
1795 \
1796 EntryProbe; \
1797 ResultType ret = 0;\
1798 DT_RETURN_MARK_FOR(Result, CallStatic##Result##Method, ResultType, \
1799 (const ResultType&)ret);\
1800 \
1801 va_list args; \
1802 va_start(args, methodID); \
1803 JavaValue jvalue(Tag); \
1804 JNI_ArgumentPusherVaArg ap(methodID, args); \
1805 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK_0); \
1806 va_end(args); \
1807 ret = jvalue.get_##ResultType(); \
1808 return ret;\
1809 JNI_END
1810
1811 // the runtime type of subword integral basic types is integer
1812 DEFINE_CALLSTATICMETHOD(jboolean, Boolean, T_BOOLEAN
1813 , HOTSPOT_JNI_CALLSTATICBOOLEANMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1814 HOTSPOT_JNI_CALLSTATICBOOLEANMETHOD_RETURN(_ret_ref));
1815 DEFINE_CALLSTATICMETHOD(jbyte, Byte, T_BYTE
1816 , HOTSPOT_JNI_CALLSTATICBYTEMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1817 HOTSPOT_JNI_CALLSTATICBYTEMETHOD_RETURN(_ret_ref));
1818 DEFINE_CALLSTATICMETHOD(jchar, Char, T_CHAR
1819 , HOTSPOT_JNI_CALLSTATICCHARMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1820 HOTSPOT_JNI_CALLSTATICCHARMETHOD_RETURN(_ret_ref));
1821 DEFINE_CALLSTATICMETHOD(jshort, Short, T_SHORT
1822 , HOTSPOT_JNI_CALLSTATICSHORTMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1823 HOTSPOT_JNI_CALLSTATICSHORTMETHOD_RETURN(_ret_ref));
1824
1825 DEFINE_CALLSTATICMETHOD(jobject, Object, T_OBJECT
1826 , HOTSPOT_JNI_CALLSTATICOBJECTMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1827 HOTSPOT_JNI_CALLSTATICOBJECTMETHOD_RETURN(_ret_ref));
1828 DEFINE_CALLSTATICMETHOD(jint, Int, T_INT
1829 , HOTSPOT_JNI_CALLSTATICINTMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1830 HOTSPOT_JNI_CALLSTATICINTMETHOD_RETURN(_ret_ref));
1831 DEFINE_CALLSTATICMETHOD(jlong, Long, T_LONG
1832 , HOTSPOT_JNI_CALLSTATICLONGMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1833 HOTSPOT_JNI_CALLSTATICLONGMETHOD_RETURN(_ret_ref));
1834 // Float and double probes don't return value because dtrace doesn't currently support it
1835 DEFINE_CALLSTATICMETHOD(jfloat, Float, T_FLOAT
1836 , HOTSPOT_JNI_CALLSTATICFLOATMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1837 HOTSPOT_JNI_CALLSTATICFLOATMETHOD_RETURN());
1838 DEFINE_CALLSTATICMETHOD(jdouble, Double, T_DOUBLE
1839 , HOTSPOT_JNI_CALLSTATICDOUBLEMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1840 HOTSPOT_JNI_CALLSTATICDOUBLEMETHOD_RETURN());
1841
1842 #define DEFINE_CALLSTATICMETHODV(ResultType, Result, Tag \
1843 , EntryProbe, ResultProbe) \
1844 \
1845 DT_RETURN_MARK_DECL_FOR(Result, CallStatic##Result##MethodV, ResultType \
1846 , ResultProbe); \
1847 \
1848 JNI_ENTRY(ResultType, \
1849 jni_CallStatic##Result##MethodV(JNIEnv *env, jclass cls, jmethodID methodID, va_list args)) \
1850 JNIWrapper("CallStatic" XSTR(Result) "MethodV"); \
1851 \
1852 EntryProbe; \
1853 ResultType ret = 0;\
1854 DT_RETURN_MARK_FOR(Result, CallStatic##Result##MethodV, ResultType, \
1855 (const ResultType&)ret);\
1856 \
1857 JavaValue jvalue(Tag); \
1858 JNI_ArgumentPusherVaArg ap(methodID, args); \
1859 /* Make sure class is initialized before trying to invoke its method */ \
1860 KlassHandle k(THREAD, java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls))); \
1861 k()->initialize(CHECK_0); \
1862 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK_0); \
1863 va_end(args); \
1864 ret = jvalue.get_##ResultType(); \
1865 return ret;\
1866 JNI_END
1867
1868 // the runtime type of subword integral basic types is integer
1869 DEFINE_CALLSTATICMETHODV(jboolean, Boolean, T_BOOLEAN
1870 , HOTSPOT_JNI_CALLSTATICBOOLEANMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1871 HOTSPOT_JNI_CALLSTATICBOOLEANMETHODV_RETURN(_ret_ref));
1872 DEFINE_CALLSTATICMETHODV(jbyte, Byte, T_BYTE
1873 , HOTSPOT_JNI_CALLSTATICBYTEMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1874 HOTSPOT_JNI_CALLSTATICBYTEMETHODV_RETURN(_ret_ref));
1875 DEFINE_CALLSTATICMETHODV(jchar, Char, T_CHAR
1876 , HOTSPOT_JNI_CALLSTATICCHARMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1877 HOTSPOT_JNI_CALLSTATICCHARMETHODV_RETURN(_ret_ref));
1878 DEFINE_CALLSTATICMETHODV(jshort, Short, T_SHORT
1879 , HOTSPOT_JNI_CALLSTATICSHORTMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1880 HOTSPOT_JNI_CALLSTATICSHORTMETHODV_RETURN(_ret_ref));
1881
1882 DEFINE_CALLSTATICMETHODV(jobject, Object, T_OBJECT
1883 , HOTSPOT_JNI_CALLSTATICOBJECTMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1884 HOTSPOT_JNI_CALLSTATICOBJECTMETHODV_RETURN(_ret_ref));
1885 DEFINE_CALLSTATICMETHODV(jint, Int, T_INT
1886 , HOTSPOT_JNI_CALLSTATICINTMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1887 HOTSPOT_JNI_CALLSTATICINTMETHODV_RETURN(_ret_ref));
1888 DEFINE_CALLSTATICMETHODV(jlong, Long, T_LONG
1889 , HOTSPOT_JNI_CALLSTATICLONGMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1890 HOTSPOT_JNI_CALLSTATICLONGMETHODV_RETURN(_ret_ref));
1891 // Float and double probes don't return value because dtrace doesn't currently support it
1892 DEFINE_CALLSTATICMETHODV(jfloat, Float, T_FLOAT
1893 , HOTSPOT_JNI_CALLSTATICFLOATMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1894 HOTSPOT_JNI_CALLSTATICFLOATMETHODV_RETURN());
1895 DEFINE_CALLSTATICMETHODV(jdouble, Double, T_DOUBLE
1896 , HOTSPOT_JNI_CALLSTATICDOUBLEMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1897 HOTSPOT_JNI_CALLSTATICDOUBLEMETHODV_RETURN());
1898
1899 #define DEFINE_CALLSTATICMETHODA(ResultType, Result, Tag \
1900 , EntryProbe, ResultProbe) \
1901 \
1902 DT_RETURN_MARK_DECL_FOR(Result, CallStatic##Result##MethodA, ResultType \
1903 , ResultProbe); \
1904 \
1905 JNI_ENTRY(ResultType, \
1906 jni_CallStatic##Result##MethodA(JNIEnv *env, jclass cls, jmethodID methodID, const jvalue *args)) \
1907 JNIWrapper("CallStatic" XSTR(Result) "MethodA"); \
1908 \
1909 EntryProbe; \
1910 ResultType ret = 0;\
1911 DT_RETURN_MARK_FOR(Result, CallStatic##Result##MethodA, ResultType, \
1912 (const ResultType&)ret);\
1913 \
1914 JavaValue jvalue(Tag); \
1915 JNI_ArgumentPusherArray ap(methodID, args); \
1916 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK_0); \
1917 ret = jvalue.get_##ResultType(); \
1918 return ret;\
1919 JNI_END
1920
1921 // the runtime type of subword integral basic types is integer
1922 DEFINE_CALLSTATICMETHODA(jboolean, Boolean, T_BOOLEAN
1923 , HOTSPOT_JNI_CALLSTATICBOOLEANMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1924 HOTSPOT_JNI_CALLSTATICBOOLEANMETHODA_RETURN(_ret_ref));
1925 DEFINE_CALLSTATICMETHODA(jbyte, Byte, T_BYTE
1926 , HOTSPOT_JNI_CALLSTATICBYTEMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1927 HOTSPOT_JNI_CALLSTATICBYTEMETHODA_RETURN(_ret_ref));
1928 DEFINE_CALLSTATICMETHODA(jchar, Char, T_CHAR
1929 , HOTSPOT_JNI_CALLSTATICCHARMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1930 HOTSPOT_JNI_CALLSTATICCHARMETHODA_RETURN(_ret_ref));
1931 DEFINE_CALLSTATICMETHODA(jshort, Short, T_SHORT
1932 , HOTSPOT_JNI_CALLSTATICSHORTMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1933 HOTSPOT_JNI_CALLSTATICSHORTMETHODA_RETURN(_ret_ref));
1934
1935 DEFINE_CALLSTATICMETHODA(jobject, Object, T_OBJECT
1936 , HOTSPOT_JNI_CALLSTATICOBJECTMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1937 HOTSPOT_JNI_CALLSTATICOBJECTMETHODA_RETURN(_ret_ref));
1938 DEFINE_CALLSTATICMETHODA(jint, Int, T_INT
1939 , HOTSPOT_JNI_CALLSTATICINTMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1940 HOTSPOT_JNI_CALLSTATICINTMETHODA_RETURN(_ret_ref));
1941 DEFINE_CALLSTATICMETHODA(jlong, Long, T_LONG
1942 , HOTSPOT_JNI_CALLSTATICLONGMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1943 HOTSPOT_JNI_CALLSTATICLONGMETHODA_RETURN(_ret_ref));
1944 // Float and double probes don't return value because dtrace doesn't currently support it
1945 DEFINE_CALLSTATICMETHODA(jfloat, Float, T_FLOAT
1946 , HOTSPOT_JNI_CALLSTATICFLOATMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1947 HOTSPOT_JNI_CALLSTATICFLOATMETHODA_RETURN());
1948 DEFINE_CALLSTATICMETHODA(jdouble, Double, T_DOUBLE
1949 , HOTSPOT_JNI_CALLSTATICDOUBLEMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1950 HOTSPOT_JNI_CALLSTATICDOUBLEMETHODA_RETURN());
1951
1952 DT_VOID_RETURN_MARK_DECL(CallStaticVoidMethod
1953 , HOTSPOT_JNI_CALLSTATICVOIDMETHOD_RETURN());
1954 DT_VOID_RETURN_MARK_DECL(CallStaticVoidMethodV
1955 , HOTSPOT_JNI_CALLSTATICVOIDMETHODV_RETURN());
1956 DT_VOID_RETURN_MARK_DECL(CallStaticVoidMethodA
1957 , HOTSPOT_JNI_CALLSTATICVOIDMETHODA_RETURN());
1958
1959 JNI_ENTRY(void, jni_CallStaticVoidMethod(JNIEnv *env, jclass cls, jmethodID methodID, ...))
1960 JNIWrapper("CallStaticVoidMethod");
1961 HOTSPOT_JNI_CALLSTATICVOIDMETHOD_ENTRY(env, cls, (uintptr_t) methodID);
1962 DT_VOID_RETURN_MARK(CallStaticVoidMethod);
1963
1964 va_list args;
1965 va_start(args, methodID);
1966 JavaValue jvalue(T_VOID);
1967 JNI_ArgumentPusherVaArg ap(methodID, args);
1968 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK);
1969 va_end(args);
1970 JNI_END
1971
1972
1973 JNI_ENTRY(void, jni_CallStaticVoidMethodV(JNIEnv *env, jclass cls, jmethodID methodID, va_list args))
1974 JNIWrapper("CallStaticVoidMethodV");
1975 HOTSPOT_JNI_CALLSTATICVOIDMETHODV_ENTRY(env, cls, (uintptr_t) methodID);
1976 DT_VOID_RETURN_MARK(CallStaticVoidMethodV);
1977
1978 JavaValue jvalue(T_VOID);
1979 JNI_ArgumentPusherVaArg ap(methodID, args);
1980 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK);
1981 JNI_END
1982
1983
1984 JNI_ENTRY(void, jni_CallStaticVoidMethodA(JNIEnv *env, jclass cls, jmethodID methodID, const jvalue *args))
1985 JNIWrapper("CallStaticVoidMethodA");
1986 HOTSPOT_JNI_CALLSTATICVOIDMETHODA_ENTRY(env, cls, (uintptr_t) methodID);
1987 DT_VOID_RETURN_MARK(CallStaticVoidMethodA);
1988
1989 JavaValue jvalue(T_VOID);
1990 JNI_ArgumentPusherArray ap(methodID, args);
1991 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK);
1992 JNI_END
1993
1994
1995 //
1996 // Accessing Fields
1997 //
1998
1999
2000 DT_RETURN_MARK_DECL(GetFieldID, jfieldID
2001 , HOTSPOT_JNI_GETFIELDID_RETURN((uintptr_t)_ret_ref));
2002
2003 JNI_ENTRY(jfieldID, jni_GetFieldID(JNIEnv *env, jclass clazz,
2004 const char *name, const char *sig))
2005 JNIWrapper("GetFieldID");
2006 HOTSPOT_JNI_GETFIELDID_ENTRY(env, clazz, (char *) name, (char *) sig);
2007 jfieldID ret = 0;
2008 DT_RETURN_MARK(GetFieldID, jfieldID, (const jfieldID&)ret);
2009
2010 // The class should have been loaded (we have an instance of the class
2011 // passed in) so the field and signature should already be in the symbol
2012 // table. If they're not there, the field doesn't exist.
2013 TempNewSymbol fieldname = SymbolTable::probe(name, (int)strlen(name));
2014 TempNewSymbol signame = SymbolTable::probe(sig, (int)strlen(sig));
2015 if (fieldname == NULL || signame == NULL) {
2016 THROW_MSG_0(vmSymbols::java_lang_NoSuchFieldError(), (char*) name);
2017 }
2018 KlassHandle k(THREAD,
2019 java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz)));
2020 // Make sure class is initialized before handing id's out to fields
2021 k()->initialize(CHECK_NULL);
2022
2023 fieldDescriptor fd;
2024 if (!k()->is_instance_klass() ||
2025 !InstanceKlass::cast(k())->find_field(fieldname, signame, false, &fd)) {
2026 THROW_MSG_0(vmSymbols::java_lang_NoSuchFieldError(), (char*) name);
2027 }
2028
2029 // A jfieldID for a non-static field is simply the offset of the field within the instanceOop
2030 // It may also have hash bits for k, if VerifyJNIFields is turned on.
2031 ret = jfieldIDWorkaround::to_instance_jfieldID(k(), fd.offset());
2032 return ret;
2033 JNI_END
2034
2035
2036 JNI_ENTRY(jobject, jni_GetObjectField(JNIEnv *env, jobject obj, jfieldID fieldID))
2037 JNIWrapper("GetObjectField");
2038 HOTSPOT_JNI_GETOBJECTFIELD_ENTRY(env, obj, (uintptr_t) fieldID);
2039 oop o = JNIHandles::resolve_non_null(obj);
2040 Klass* k = o->klass();
2041 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID);
2042 // Keep JVMTI addition small and only check enabled flag here.
2043 // jni_GetField_probe() assumes that is okay to create handles.
2044 if (JvmtiExport::should_post_field_access()) {
2045 o = JvmtiExport::jni_GetField_probe(thread, obj, o, k, fieldID, false);
2046 }
2047 jobject ret = JNIHandles::make_local(env, o->obj_field(offset));
2048 #if INCLUDE_ALL_GCS
2049 // If G1 is enabled and we are accessing the value of the referent
2050 // field in a reference object then we need to register a non-null
2051 // referent with the SATB barrier.
2052 if (UseG1GC) {
2053 bool needs_barrier = false;
2054
2055 if (ret != NULL &&
2056 offset == java_lang_ref_Reference::referent_offset &&
2057 InstanceKlass::cast(k)->reference_type() != REF_NONE) {
2058 assert(InstanceKlass::cast(k)->is_subclass_of(SystemDictionary::Reference_klass()), "sanity");
2059 needs_barrier = true;
2060 }
2061
2062 if (needs_barrier) {
2063 oop referent = JNIHandles::resolve(ret);
2064 G1SATBCardTableModRefBS::enqueue(referent);
2065 }
2066 }
2067 #endif // INCLUDE_ALL_GCS
2068 HOTSPOT_JNI_GETOBJECTFIELD_RETURN(ret);
2069 return ret;
2070 JNI_END
2071
2072
2073
2074 #define DEFINE_GETFIELD(Return,Fieldname,Result \
2075 , EntryProbe, ReturnProbe) \
2076 \
2077 DT_RETURN_MARK_DECL_FOR(Result, Get##Result##Field, Return \
2078 , ReturnProbe); \
2079 \
2080 JNI_QUICK_ENTRY(Return, jni_Get##Result##Field(JNIEnv *env, jobject obj, jfieldID fieldID)) \
2081 JNIWrapper("Get" XSTR(Result) "Field"); \
2082 \
2083 EntryProbe; \
2084 Return ret = 0;\
2085 DT_RETURN_MARK_FOR(Result, Get##Result##Field, Return, (const Return&)ret);\
2086 \
2087 oop o = JNIHandles::resolve_non_null(obj); \
2088 Klass* k = o->klass(); \
2089 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID); \
2090 /* Keep JVMTI addition small and only check enabled flag here. */ \
2091 /* jni_GetField_probe_nh() assumes that is not okay to create handles */ \
2092 /* and creates a ResetNoHandleMark. */ \
2093 if (JvmtiExport::should_post_field_access()) { \
2094 o = JvmtiExport::jni_GetField_probe_nh(thread, obj, o, k, fieldID, false); \
2095 } \
2096 ret = o->Fieldname##_field(offset); \
2097 return ret; \
2098 JNI_END
2099
2100 DEFINE_GETFIELD(jboolean, bool, Boolean
2101 , HOTSPOT_JNI_GETBOOLEANFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2102 HOTSPOT_JNI_GETBOOLEANFIELD_RETURN(_ret_ref))
2103 DEFINE_GETFIELD(jbyte, byte, Byte
2104 , HOTSPOT_JNI_GETBYTEFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2105 HOTSPOT_JNI_GETBYTEFIELD_RETURN(_ret_ref))
2106 DEFINE_GETFIELD(jchar, char, Char
2107 , HOTSPOT_JNI_GETCHARFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2108 HOTSPOT_JNI_GETCHARFIELD_RETURN(_ret_ref))
2109 DEFINE_GETFIELD(jshort, short, Short
2110 , HOTSPOT_JNI_GETSHORTFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2111 HOTSPOT_JNI_GETSHORTFIELD_RETURN(_ret_ref))
2112 DEFINE_GETFIELD(jint, int, Int
2113 , HOTSPOT_JNI_GETINTFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2114 HOTSPOT_JNI_GETINTFIELD_RETURN(_ret_ref))
2115 DEFINE_GETFIELD(jlong, long, Long
2116 , HOTSPOT_JNI_GETLONGFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2117 HOTSPOT_JNI_GETLONGFIELD_RETURN(_ret_ref))
2118 // Float and double probes don't return value because dtrace doesn't currently support it
2119 DEFINE_GETFIELD(jfloat, float, Float
2120 , HOTSPOT_JNI_GETFLOATFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2121 HOTSPOT_JNI_GETFLOATFIELD_RETURN())
2122 DEFINE_GETFIELD(jdouble, double, Double
2123 , HOTSPOT_JNI_GETDOUBLEFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2124 HOTSPOT_JNI_GETDOUBLEFIELD_RETURN())
2125
2126 address jni_GetBooleanField_addr() {
2127 return (address)jni_GetBooleanField;
2128 }
2129 address jni_GetByteField_addr() {
2130 return (address)jni_GetByteField;
2131 }
2132 address jni_GetCharField_addr() {
2133 return (address)jni_GetCharField;
2134 }
2135 address jni_GetShortField_addr() {
2136 return (address)jni_GetShortField;
2137 }
2138 address jni_GetIntField_addr() {
2139 return (address)jni_GetIntField;
2140 }
2141 address jni_GetLongField_addr() {
2142 return (address)jni_GetLongField;
2143 }
2144 address jni_GetFloatField_addr() {
2145 return (address)jni_GetFloatField;
2146 }
2147 address jni_GetDoubleField_addr() {
2148 return (address)jni_GetDoubleField;
2149 }
2150
2151 JNI_QUICK_ENTRY(void, jni_SetObjectField(JNIEnv *env, jobject obj, jfieldID fieldID, jobject value))
2152 JNIWrapper("SetObjectField");
2153 HOTSPOT_JNI_SETOBJECTFIELD_ENTRY(env, obj, (uintptr_t) fieldID, value);
2154 oop o = JNIHandles::resolve_non_null(obj);
2155 Klass* k = o->klass();
2156 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID);
2157 // Keep JVMTI addition small and only check enabled flag here.
2158 // jni_SetField_probe_nh() assumes that is not okay to create handles
2159 // and creates a ResetNoHandleMark.
2160 if (JvmtiExport::should_post_field_modification()) {
2161 jvalue field_value;
2162 field_value.l = value;
2163 o = JvmtiExport::jni_SetField_probe_nh(thread, obj, o, k, fieldID, false, 'L', (jvalue *)&field_value);
2164 }
2165 o->obj_field_put(offset, JNIHandles::resolve(value));
2166 HOTSPOT_JNI_SETOBJECTFIELD_RETURN();
2167 JNI_END
2168
2169
2170 #define DEFINE_SETFIELD(Argument,Fieldname,Result,SigType,unionType \
2171 , EntryProbe, ReturnProbe) \
2172 \
2173 JNI_QUICK_ENTRY(void, jni_Set##Result##Field(JNIEnv *env, jobject obj, jfieldID fieldID, Argument value)) \
2174 JNIWrapper("Set" XSTR(Result) "Field"); \
2175 \
2176 EntryProbe; \
2177 \
2178 oop o = JNIHandles::resolve_non_null(obj); \
2179 Klass* k = o->klass(); \
2180 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID); \
2181 /* Keep JVMTI addition small and only check enabled flag here. */ \
2182 /* jni_SetField_probe_nh() assumes that is not okay to create handles */ \
2183 /* and creates a ResetNoHandleMark. */ \
2184 if (JvmtiExport::should_post_field_modification()) { \
2185 jvalue field_value; \
2186 field_value.unionType = value; \
2187 o = JvmtiExport::jni_SetField_probe_nh(thread, obj, o, k, fieldID, false, SigType, (jvalue *)&field_value); \
2188 } \
2189 o->Fieldname##_field_put(offset, value); \
2190 ReturnProbe; \
2191 JNI_END
2192
2193 DEFINE_SETFIELD(jboolean, bool, Boolean, 'Z', z
2194 , HOTSPOT_JNI_SETBOOLEANFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value),
2195 HOTSPOT_JNI_SETBOOLEANFIELD_RETURN())
2196 DEFINE_SETFIELD(jbyte, byte, Byte, 'B', b
2197 , HOTSPOT_JNI_SETBYTEFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value),
2198 HOTSPOT_JNI_SETBYTEFIELD_RETURN())
2199 DEFINE_SETFIELD(jchar, char, Char, 'C', c
2200 , HOTSPOT_JNI_SETCHARFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value),
2201 HOTSPOT_JNI_SETCHARFIELD_RETURN())
2202 DEFINE_SETFIELD(jshort, short, Short, 'S', s
2203 , HOTSPOT_JNI_SETSHORTFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value),
2204 HOTSPOT_JNI_SETSHORTFIELD_RETURN())
2205 DEFINE_SETFIELD(jint, int, Int, 'I', i
2206 , HOTSPOT_JNI_SETINTFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value),
2207 HOTSPOT_JNI_SETINTFIELD_RETURN())
2208 DEFINE_SETFIELD(jlong, long, Long, 'J', j
2209 , HOTSPOT_JNI_SETLONGFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value),
2210 HOTSPOT_JNI_SETLONGFIELD_RETURN())
2211 // Float and double probes don't return value because dtrace doesn't currently support it
2212 DEFINE_SETFIELD(jfloat, float, Float, 'F', f
2213 , HOTSPOT_JNI_SETFLOATFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2214 HOTSPOT_JNI_SETFLOATFIELD_RETURN())
2215 DEFINE_SETFIELD(jdouble, double, Double, 'D', d
2216 , HOTSPOT_JNI_SETDOUBLEFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2217 HOTSPOT_JNI_SETDOUBLEFIELD_RETURN())
2218
2219 DT_RETURN_MARK_DECL(ToReflectedField, jobject
2220 , HOTSPOT_JNI_TOREFLECTEDFIELD_RETURN(_ret_ref));
2221
2222 JNI_ENTRY(jobject, jni_ToReflectedField(JNIEnv *env, jclass cls, jfieldID fieldID, jboolean isStatic))
2223 JNIWrapper("ToReflectedField");
2224 HOTSPOT_JNI_TOREFLECTEDFIELD_ENTRY(env, cls, (uintptr_t) fieldID, isStatic);
2225 jobject ret = NULL;
2226 DT_RETURN_MARK(ToReflectedField, jobject, (const jobject&)ret);
2227
2228 fieldDescriptor fd;
2229 bool found = false;
2230 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2231
2232 assert(jfieldIDWorkaround::is_static_jfieldID(fieldID) == (isStatic != 0), "invalid fieldID");
2233
2234 if (isStatic) {
2235 // Static field. The fieldID a JNIid specifying the field holder and the offset within the Klass*.
2236 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID);
2237 assert(id->is_static_field_id(), "invalid static field id");
2238 found = id->find_local_field(&fd);
2239 } else {
2240 // Non-static field. The fieldID is really the offset of the field within the instanceOop.
2241 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID);
2242 found = InstanceKlass::cast(k)->find_field_from_offset(offset, false, &fd);
2243 }
2244 assert(found, "bad fieldID passed into jni_ToReflectedField");
2245 oop reflected = Reflection::new_field(&fd, CHECK_NULL);
2246 ret = JNIHandles::make_local(env, reflected);
2247 return ret;
2248 JNI_END
2249
2250
2251 //
2252 // Accessing Static Fields
2253 //
2254 DT_RETURN_MARK_DECL(GetStaticFieldID, jfieldID
2255 , HOTSPOT_JNI_GETSTATICFIELDID_RETURN((uintptr_t)_ret_ref));
2256
2257 JNI_ENTRY(jfieldID, jni_GetStaticFieldID(JNIEnv *env, jclass clazz,
2258 const char *name, const char *sig))
2259 JNIWrapper("GetStaticFieldID");
2260 HOTSPOT_JNI_GETSTATICFIELDID_ENTRY(env, clazz, (char *) name, (char *) sig);
2261 jfieldID ret = NULL;
2262 DT_RETURN_MARK(GetStaticFieldID, jfieldID, (const jfieldID&)ret);
2263
2264 // The class should have been loaded (we have an instance of the class
2265 // passed in) so the field and signature should already be in the symbol
2266 // table. If they're not there, the field doesn't exist.
2267 TempNewSymbol fieldname = SymbolTable::probe(name, (int)strlen(name));
2268 TempNewSymbol signame = SymbolTable::probe(sig, (int)strlen(sig));
2269 if (fieldname == NULL || signame == NULL) {
2270 THROW_MSG_0(vmSymbols::java_lang_NoSuchFieldError(), (char*) name);
2271 }
2272 KlassHandle k(THREAD,
2273 java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz)));
2274 // Make sure class is initialized before handing id's out to static fields
2275 k()->initialize(CHECK_NULL);
2276
2277 fieldDescriptor fd;
2278 if (!k()->is_instance_klass() ||
2279 !InstanceKlass::cast(k())->find_field(fieldname, signame, true, &fd)) {
2280 THROW_MSG_0(vmSymbols::java_lang_NoSuchFieldError(), (char*) name);
2281 }
2282
2283 // A jfieldID for a static field is a JNIid specifying the field holder and the offset within the Klass*
2284 JNIid* id = fd.field_holder()->jni_id_for(fd.offset());
2285 debug_only(id->set_is_static_field_id();)
2286
2287 debug_only(id->verify(fd.field_holder()));
2288
2289 ret = jfieldIDWorkaround::to_static_jfieldID(id);
2290 return ret;
2291 JNI_END
2292
2293
2294 JNI_ENTRY(jobject, jni_GetStaticObjectField(JNIEnv *env, jclass clazz, jfieldID fieldID))
2295 JNIWrapper("GetStaticObjectField");
2296 HOTSPOT_JNI_GETSTATICOBJECTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID);
2297 #if INCLUDE_JNI_CHECK
2298 DEBUG_ONLY(Klass* param_k = jniCheck::validate_class(thread, clazz);)
2299 #endif // INCLUDE_JNI_CHECK
2300 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID);
2301 assert(id->is_static_field_id(), "invalid static field id");
2302 // Keep JVMTI addition small and only check enabled flag here.
2303 // jni_GetField_probe() assumes that is okay to create handles.
2304 if (JvmtiExport::should_post_field_access()) {
2305 JvmtiExport::jni_GetField_probe(thread, NULL, NULL, id->holder(), fieldID, true);
2306 }
2307 jobject ret = JNIHandles::make_local(id->holder()->java_mirror()->obj_field(id->offset()));
2308 HOTSPOT_JNI_GETSTATICOBJECTFIELD_RETURN(ret);
2309 return ret;
2310 JNI_END
2311
2312
2313 #define DEFINE_GETSTATICFIELD(Return,Fieldname,Result \
2314 , EntryProbe, ReturnProbe) \
2315 \
2316 DT_RETURN_MARK_DECL_FOR(Result, GetStatic##Result##Field, Return \
2317 , ReturnProbe); \
2318 \
2319 JNI_ENTRY(Return, jni_GetStatic##Result##Field(JNIEnv *env, jclass clazz, jfieldID fieldID)) \
2320 JNIWrapper("GetStatic" XSTR(Result) "Field"); \
2321 EntryProbe; \
2322 Return ret = 0;\
2323 DT_RETURN_MARK_FOR(Result, GetStatic##Result##Field, Return, \
2324 (const Return&)ret);\
2325 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID); \
2326 assert(id->is_static_field_id(), "invalid static field id"); \
2327 /* Keep JVMTI addition small and only check enabled flag here. */ \
2328 /* jni_GetField_probe() assumes that is okay to create handles. */ \
2329 if (JvmtiExport::should_post_field_access()) { \
2330 JvmtiExport::jni_GetField_probe(thread, NULL, NULL, id->holder(), fieldID, true); \
2331 } \
2332 ret = id->holder()->java_mirror()-> Fieldname##_field (id->offset()); \
2333 return ret;\
2334 JNI_END
2335
2336 DEFINE_GETSTATICFIELD(jboolean, bool, Boolean
2337 , HOTSPOT_JNI_GETSTATICBOOLEANFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICBOOLEANFIELD_RETURN(_ret_ref))
2338 DEFINE_GETSTATICFIELD(jbyte, byte, Byte
2339 , HOTSPOT_JNI_GETSTATICBYTEFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICBYTEFIELD_RETURN(_ret_ref) )
2340 DEFINE_GETSTATICFIELD(jchar, char, Char
2341 , HOTSPOT_JNI_GETSTATICCHARFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICCHARFIELD_RETURN(_ret_ref) )
2342 DEFINE_GETSTATICFIELD(jshort, short, Short
2343 , HOTSPOT_JNI_GETSTATICSHORTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICSHORTFIELD_RETURN(_ret_ref) )
2344 DEFINE_GETSTATICFIELD(jint, int, Int
2345 , HOTSPOT_JNI_GETSTATICINTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICINTFIELD_RETURN(_ret_ref) )
2346 DEFINE_GETSTATICFIELD(jlong, long, Long
2347 , HOTSPOT_JNI_GETSTATICLONGFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICLONGFIELD_RETURN(_ret_ref) )
2348 // Float and double probes don't return value because dtrace doesn't currently support it
2349 DEFINE_GETSTATICFIELD(jfloat, float, Float
2350 , HOTSPOT_JNI_GETSTATICFLOATFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICFLOATFIELD_RETURN() )
2351 DEFINE_GETSTATICFIELD(jdouble, double, Double
2352 , HOTSPOT_JNI_GETSTATICDOUBLEFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICDOUBLEFIELD_RETURN() )
2353
2354 JNI_ENTRY(void, jni_SetStaticObjectField(JNIEnv *env, jclass clazz, jfieldID fieldID, jobject value))
2355 JNIWrapper("SetStaticObjectField");
2356 HOTSPOT_JNI_SETSTATICOBJECTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value);
2357 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID);
2358 assert(id->is_static_field_id(), "invalid static field id");
2359 // Keep JVMTI addition small and only check enabled flag here.
2360 // jni_SetField_probe() assumes that is okay to create handles.
2361 if (JvmtiExport::should_post_field_modification()) {
2362 jvalue field_value;
2363 field_value.l = value;
2364 JvmtiExport::jni_SetField_probe(thread, NULL, NULL, id->holder(), fieldID, true, 'L', (jvalue *)&field_value);
2365 }
2366 id->holder()->java_mirror()->obj_field_put(id->offset(), JNIHandles::resolve(value));
2367 HOTSPOT_JNI_SETSTATICOBJECTFIELD_RETURN();
2368 JNI_END
2369
2370
2371
2372 #define DEFINE_SETSTATICFIELD(Argument,Fieldname,Result,SigType,unionType \
2373 , EntryProbe, ReturnProbe) \
2374 \
2375 JNI_ENTRY(void, jni_SetStatic##Result##Field(JNIEnv *env, jclass clazz, jfieldID fieldID, Argument value)) \
2376 JNIWrapper("SetStatic" XSTR(Result) "Field"); \
2377 EntryProbe; \
2378 \
2379 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID); \
2380 assert(id->is_static_field_id(), "invalid static field id"); \
2381 /* Keep JVMTI addition small and only check enabled flag here. */ \
2382 /* jni_SetField_probe() assumes that is okay to create handles. */ \
2383 if (JvmtiExport::should_post_field_modification()) { \
2384 jvalue field_value; \
2385 field_value.unionType = value; \
2386 JvmtiExport::jni_SetField_probe(thread, NULL, NULL, id->holder(), fieldID, true, SigType, (jvalue *)&field_value); \
2387 } \
2388 id->holder()->java_mirror()-> Fieldname##_field_put (id->offset(), value); \
2389 ReturnProbe;\
2390 JNI_END
2391
2392 DEFINE_SETSTATICFIELD(jboolean, bool, Boolean, 'Z', z
2393 , HOTSPOT_JNI_SETSTATICBOOLEANFIELD_ENTRY(env, clazz, (uintptr_t)fieldID, value),
2394 HOTSPOT_JNI_SETSTATICBOOLEANFIELD_RETURN())
2395 DEFINE_SETSTATICFIELD(jbyte, byte, Byte, 'B', b
2396 , HOTSPOT_JNI_SETSTATICBYTEFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value),
2397 HOTSPOT_JNI_SETSTATICBYTEFIELD_RETURN())
2398 DEFINE_SETSTATICFIELD(jchar, char, Char, 'C', c
2399 , HOTSPOT_JNI_SETSTATICCHARFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value),
2400 HOTSPOT_JNI_SETSTATICCHARFIELD_RETURN())
2401 DEFINE_SETSTATICFIELD(jshort, short, Short, 'S', s
2402 , HOTSPOT_JNI_SETSTATICSHORTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value),
2403 HOTSPOT_JNI_SETSTATICSHORTFIELD_RETURN())
2404 DEFINE_SETSTATICFIELD(jint, int, Int, 'I', i
2405 , HOTSPOT_JNI_SETSTATICINTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value),
2406 HOTSPOT_JNI_SETSTATICINTFIELD_RETURN())
2407 DEFINE_SETSTATICFIELD(jlong, long, Long, 'J', j
2408 , HOTSPOT_JNI_SETSTATICLONGFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value),
2409 HOTSPOT_JNI_SETSTATICLONGFIELD_RETURN())
2410 // Float and double probes don't return value because dtrace doesn't currently support it
2411 DEFINE_SETSTATICFIELD(jfloat, float, Float, 'F', f
2412 , HOTSPOT_JNI_SETSTATICFLOATFIELD_ENTRY(env, clazz, (uintptr_t) fieldID),
2413 HOTSPOT_JNI_SETSTATICFLOATFIELD_RETURN())
2414 DEFINE_SETSTATICFIELD(jdouble, double, Double, 'D', d
2415 , HOTSPOT_JNI_SETSTATICDOUBLEFIELD_ENTRY(env, clazz, (uintptr_t) fieldID),
2416 HOTSPOT_JNI_SETSTATICDOUBLEFIELD_RETURN())
2417
2418 //
2419 // String Operations
2420 //
2421
2422 // Unicode Interface
2423
2424 DT_RETURN_MARK_DECL(NewString, jstring
2425 , HOTSPOT_JNI_NEWSTRING_RETURN(_ret_ref));
2426
2427 JNI_ENTRY(jstring, jni_NewString(JNIEnv *env, const jchar *unicodeChars, jsize len))
2428 JNIWrapper("NewString");
2429 HOTSPOT_JNI_NEWSTRING_ENTRY(env, (uint16_t *) unicodeChars, len);
2430 jstring ret = NULL;
2431 DT_RETURN_MARK(NewString, jstring, (const jstring&)ret);
2432 oop string=java_lang_String::create_oop_from_unicode((jchar*) unicodeChars, len, CHECK_NULL);
2433 ret = (jstring) JNIHandles::make_local(env, string);
2434 return ret;
2435 JNI_END
2436
2437
2438 JNI_QUICK_ENTRY(jsize, jni_GetStringLength(JNIEnv *env, jstring string))
2439 JNIWrapper("GetStringLength");
2440 HOTSPOT_JNI_GETSTRINGLENGTH_ENTRY(env, string);
2441 jsize ret = 0;
2442 oop s = JNIHandles::resolve_non_null(string);
2443 if (java_lang_String::value(s) != NULL) {
2444 ret = java_lang_String::length(s);
2445 }
2446 HOTSPOT_JNI_GETSTRINGLENGTH_RETURN(ret);
2447 return ret;
2448 JNI_END
2449
2450
2451 JNI_QUICK_ENTRY(const jchar*, jni_GetStringChars(
2452 JNIEnv *env, jstring string, jboolean *isCopy))
2453 JNIWrapper("GetStringChars");
2454 HOTSPOT_JNI_GETSTRINGCHARS_ENTRY(env, string, (uintptr_t *) isCopy);
2455 jchar* buf = NULL;
2456 oop s = JNIHandles::resolve_non_null(string);
2457 typeArrayOop s_value = java_lang_String::value(s);
2458 if (s_value != NULL) {
2459 int s_len = java_lang_String::length(s);
2460 bool is_latin1 = java_lang_String::is_latin1(s);
2461 buf = NEW_C_HEAP_ARRAY_RETURN_NULL(jchar, s_len + 1, mtInternal); // add one for zero termination
2462 /* JNI Specification states return NULL on OOM */
2463 if (buf != NULL) {
2464 if (s_len > 0) {
2465 if (!is_latin1) {
2466 memcpy(buf, s_value->char_at_addr(0), sizeof(jchar)*s_len);
2467 } else {
2468 for (int i = 0; i < s_len; i++) {
2469 buf[i] = ((jchar) s_value->byte_at(i)) & 0xff;
2470 }
2471 }
2472 }
2473 buf[s_len] = 0;
2474 //%note jni_5
2475 if (isCopy != NULL) {
2476 *isCopy = JNI_TRUE;
2477 }
2478 }
2479 }
2480 HOTSPOT_JNI_GETSTRINGCHARS_RETURN(buf);
2481 return buf;
2482 JNI_END
2483
2484
2485 JNI_QUICK_ENTRY(void, jni_ReleaseStringChars(JNIEnv *env, jstring str, const jchar *chars))
2486 JNIWrapper("ReleaseStringChars");
2487 HOTSPOT_JNI_RELEASESTRINGCHARS_ENTRY(env, str, (uint16_t *) chars);
2488 //%note jni_6
2489 if (chars != NULL) {
2490 // Since String objects are supposed to be immutable, don't copy any
2491 // new data back. A bad user will have to go after the char array.
2492 FreeHeap((void*) chars);
2493 }
2494 HOTSPOT_JNI_RELEASESTRINGCHARS_RETURN();
2495 JNI_END
2496
2497
2498 // UTF Interface
2499
2500 DT_RETURN_MARK_DECL(NewStringUTF, jstring
2501 , HOTSPOT_JNI_NEWSTRINGUTF_RETURN(_ret_ref));
2502
2503 JNI_ENTRY(jstring, jni_NewStringUTF(JNIEnv *env, const char *bytes))
2504 JNIWrapper("NewStringUTF");
2505 HOTSPOT_JNI_NEWSTRINGUTF_ENTRY(env, (char *) bytes);
2506 jstring ret;
2507 DT_RETURN_MARK(NewStringUTF, jstring, (const jstring&)ret);
2508
2509 oop result = java_lang_String::create_oop_from_str((char*) bytes, CHECK_NULL);
2510 ret = (jstring) JNIHandles::make_local(env, result);
2511 return ret;
2512 JNI_END
2513
2514
2515 JNI_ENTRY(jsize, jni_GetStringUTFLength(JNIEnv *env, jstring string))
2516 JNIWrapper("GetStringUTFLength");
2517 HOTSPOT_JNI_GETSTRINGUTFLENGTH_ENTRY(env, string);
2518 jsize ret = 0;
2519 oop java_string = JNIHandles::resolve_non_null(string);
2520 if (java_lang_String::value(java_string) != NULL) {
2521 ret = java_lang_String::utf8_length(java_string);
2522 }
2523 HOTSPOT_JNI_GETSTRINGUTFLENGTH_RETURN(ret);
2524 return ret;
2525 JNI_END
2526
2527
2528 JNI_ENTRY(const char*, jni_GetStringUTFChars(JNIEnv *env, jstring string, jboolean *isCopy))
2529 JNIWrapper("GetStringUTFChars");
2530 HOTSPOT_JNI_GETSTRINGUTFCHARS_ENTRY(env, string, (uintptr_t *) isCopy);
2531 char* result = NULL;
2532 oop java_string = JNIHandles::resolve_non_null(string);
2533 if (java_lang_String::value(java_string) != NULL) {
2534 size_t length = java_lang_String::utf8_length(java_string);
2535 /* JNI Specification states return NULL on OOM */
2536 result = AllocateHeap(length + 1, mtInternal, 0, AllocFailStrategy::RETURN_NULL);
2537 if (result != NULL) {
2538 java_lang_String::as_utf8_string(java_string, result, (int) length + 1);
2539 if (isCopy != NULL) {
2540 *isCopy = JNI_TRUE;
2541 }
2542 }
2543 }
2544 HOTSPOT_JNI_GETSTRINGUTFCHARS_RETURN(result);
2545 return result;
2546 JNI_END
2547
2548
2549 JNI_LEAF(void, jni_ReleaseStringUTFChars(JNIEnv *env, jstring str, const char *chars))
2550 JNIWrapper("ReleaseStringUTFChars");
2551 HOTSPOT_JNI_RELEASESTRINGUTFCHARS_ENTRY(env, str, (char *) chars);
2552 if (chars != NULL) {
2553 FreeHeap((char*) chars);
2554 }
2555 HOTSPOT_JNI_RELEASESTRINGUTFCHARS_RETURN();
2556 JNI_END
2557
2558
2559 JNI_QUICK_ENTRY(jsize, jni_GetArrayLength(JNIEnv *env, jarray array))
2560 JNIWrapper("GetArrayLength");
2561 HOTSPOT_JNI_GETARRAYLENGTH_ENTRY(env, array);
2562 arrayOop a = arrayOop(JNIHandles::resolve_non_null(array));
2563 assert(a->is_array(), "must be array");
2564 jsize ret = a->length();
2565 HOTSPOT_JNI_GETARRAYLENGTH_RETURN(ret);
2566 return ret;
2567 JNI_END
2568
2569
2570 //
2571 // Object Array Operations
2572 //
2573
2574 DT_RETURN_MARK_DECL(NewObjectArray, jobjectArray
2575 , HOTSPOT_JNI_NEWOBJECTARRAY_RETURN(_ret_ref));
2576
2577 JNI_ENTRY(jobjectArray, jni_NewObjectArray(JNIEnv *env, jsize length, jclass elementClass, jobject initialElement))
2578 JNIWrapper("NewObjectArray");
2579 HOTSPOT_JNI_NEWOBJECTARRAY_ENTRY(env, length, elementClass, initialElement);
2580 jobjectArray ret = NULL;
2581 DT_RETURN_MARK(NewObjectArray, jobjectArray, (const jobjectArray&)ret);
2582 KlassHandle ek(THREAD, java_lang_Class::as_Klass(JNIHandles::resolve_non_null(elementClass)));
2583 Klass* ako = ek()->array_klass(CHECK_NULL);
2584 KlassHandle ak = KlassHandle(THREAD, ako);
2585 ObjArrayKlass::cast(ak())->initialize(CHECK_NULL);
2586 objArrayOop result = ObjArrayKlass::cast(ak())->allocate(length, CHECK_NULL);
2587 oop initial_value = JNIHandles::resolve(initialElement);
2588 if (initial_value != NULL) { // array already initialized with NULL
2589 for (int index = 0; index < length; index++) {
2590 result->obj_at_put(index, initial_value);
2591 }
2592 }
2593 ret = (jobjectArray) JNIHandles::make_local(env, result);
2594 return ret;
2595 JNI_END
2596
2597 DT_RETURN_MARK_DECL(GetObjectArrayElement, jobject
2598 , HOTSPOT_JNI_GETOBJECTARRAYELEMENT_RETURN(_ret_ref));
2599
2600 JNI_ENTRY(jobject, jni_GetObjectArrayElement(JNIEnv *env, jobjectArray array, jsize index))
2601 JNIWrapper("GetObjectArrayElement");
2602 HOTSPOT_JNI_GETOBJECTARRAYELEMENT_ENTRY(env, array, index);
2603 jobject ret = NULL;
2604 DT_RETURN_MARK(GetObjectArrayElement, jobject, (const jobject&)ret);
2605 objArrayOop a = objArrayOop(JNIHandles::resolve_non_null(array));
2606 if (a->is_within_bounds(index)) {
2607 ret = JNIHandles::make_local(env, a->obj_at(index));
2608 return ret;
2609 } else {
2610 char buf[jintAsStringSize];
2611 sprintf(buf, "%d", index);
2612 THROW_MSG_0(vmSymbols::java_lang_ArrayIndexOutOfBoundsException(), buf);
2613 }
2614 JNI_END
2615
2616 DT_VOID_RETURN_MARK_DECL(SetObjectArrayElement
2617 , HOTSPOT_JNI_SETOBJECTARRAYELEMENT_RETURN());
2618
2619 JNI_ENTRY(void, jni_SetObjectArrayElement(JNIEnv *env, jobjectArray array, jsize index, jobject value))
2620 JNIWrapper("SetObjectArrayElement");
2621 HOTSPOT_JNI_SETOBJECTARRAYELEMENT_ENTRY(env, array, index, value);
2622 DT_VOID_RETURN_MARK(SetObjectArrayElement);
2623
2624 objArrayOop a = objArrayOop(JNIHandles::resolve_non_null(array));
2625 oop v = JNIHandles::resolve(value);
2626 if (a->is_within_bounds(index)) {
2627 if (v == NULL || v->is_a(ObjArrayKlass::cast(a->klass())->element_klass())) {
2628 a->obj_at_put(index, v);
2629 } else {
2630 THROW(vmSymbols::java_lang_ArrayStoreException());
2631 }
2632 } else {
2633 char buf[jintAsStringSize];
2634 sprintf(buf, "%d", index);
2635 THROW_MSG(vmSymbols::java_lang_ArrayIndexOutOfBoundsException(), buf);
2636 }
2637 JNI_END
2638
2639
2640
2641 #define DEFINE_NEWSCALARARRAY(Return,Allocator,Result \
2642 ,EntryProbe,ReturnProbe) \
2643 \
2644 DT_RETURN_MARK_DECL(New##Result##Array, Return \
2645 , ReturnProbe); \
2646 \
2647 JNI_ENTRY(Return, \
2648 jni_New##Result##Array(JNIEnv *env, jsize len)) \
2649 JNIWrapper("New" XSTR(Result) "Array"); \
2650 EntryProbe; \
2651 Return ret = NULL;\
2652 DT_RETURN_MARK(New##Result##Array, Return, (const Return&)ret);\
2653 \
2654 oop obj= oopFactory::Allocator(len, CHECK_0); \
2655 ret = (Return) JNIHandles::make_local(env, obj); \
2656 return ret;\
2657 JNI_END
2658
2659 DEFINE_NEWSCALARARRAY(jbooleanArray, new_boolArray, Boolean,
2660 HOTSPOT_JNI_NEWBOOLEANARRAY_ENTRY(env, len),
2661 HOTSPOT_JNI_NEWBOOLEANARRAY_RETURN(_ret_ref))
2662 DEFINE_NEWSCALARARRAY(jbyteArray, new_byteArray, Byte,
2663 HOTSPOT_JNI_NEWBYTEARRAY_ENTRY(env, len),
2664 HOTSPOT_JNI_NEWBYTEARRAY_RETURN(_ret_ref))
2665 DEFINE_NEWSCALARARRAY(jshortArray, new_shortArray, Short,
2666 HOTSPOT_JNI_NEWSHORTARRAY_ENTRY(env, len),
2667 HOTSPOT_JNI_NEWSHORTARRAY_RETURN(_ret_ref))
2668 DEFINE_NEWSCALARARRAY(jcharArray, new_charArray, Char,
2669 HOTSPOT_JNI_NEWCHARARRAY_ENTRY(env, len),
2670 HOTSPOT_JNI_NEWCHARARRAY_RETURN(_ret_ref))
2671 DEFINE_NEWSCALARARRAY(jintArray, new_intArray, Int,
2672 HOTSPOT_JNI_NEWINTARRAY_ENTRY(env, len),
2673 HOTSPOT_JNI_NEWINTARRAY_RETURN(_ret_ref))
2674 DEFINE_NEWSCALARARRAY(jlongArray, new_longArray, Long,
2675 HOTSPOT_JNI_NEWLONGARRAY_ENTRY(env, len),
2676 HOTSPOT_JNI_NEWLONGARRAY_RETURN(_ret_ref))
2677 DEFINE_NEWSCALARARRAY(jfloatArray, new_singleArray, Float,
2678 HOTSPOT_JNI_NEWFLOATARRAY_ENTRY(env, len),
2679 HOTSPOT_JNI_NEWFLOATARRAY_RETURN(_ret_ref))
2680 DEFINE_NEWSCALARARRAY(jdoubleArray, new_doubleArray, Double,
2681 HOTSPOT_JNI_NEWDOUBLEARRAY_ENTRY(env, len),
2682 HOTSPOT_JNI_NEWDOUBLEARRAY_RETURN(_ret_ref))
2683
2684 // Return an address which will fault if the caller writes to it.
2685
2686 static char* get_bad_address() {
2687 static char* bad_address = NULL;
2688 if (bad_address == NULL) {
2689 size_t size = os::vm_allocation_granularity();
2690 bad_address = os::reserve_memory(size);
2691 if (bad_address != NULL) {
2692 os::protect_memory(bad_address, size, os::MEM_PROT_READ,
2693 /*is_committed*/false);
2694 MemTracker::record_virtual_memory_type((void*)bad_address, mtInternal);
2695 }
2696 }
2697 return bad_address;
2698 }
2699
2700
2701
2702 #define DEFINE_GETSCALARARRAYELEMENTS(ElementTag,ElementType,Result, Tag \
2703 , EntryProbe, ReturnProbe) \
2704 \
2705 JNI_QUICK_ENTRY(ElementType*, \
2706 jni_Get##Result##ArrayElements(JNIEnv *env, ElementType##Array array, jboolean *isCopy)) \
2707 JNIWrapper("Get" XSTR(Result) "ArrayElements"); \
2708 EntryProbe; \
2709 /* allocate an chunk of memory in c land */ \
2710 typeArrayOop a = typeArrayOop(JNIHandles::resolve_non_null(array)); \
2711 ElementType* result; \
2712 int len = a->length(); \
2713 if (len == 0) { \
2714 /* Empty array: legal but useless, can't return NULL. \
2715 * Return a pointer to something useless. \
2716 * Avoid asserts in typeArrayOop. */ \
2717 result = (ElementType*)get_bad_address(); \
2718 } else { \
2719 /* JNI Specification states return NULL on OOM */ \
2720 result = NEW_C_HEAP_ARRAY_RETURN_NULL(ElementType, len, mtInternal); \
2721 if (result != NULL) { \
2722 /* copy the array to the c chunk */ \
2723 memcpy(result, a->Tag##_at_addr(0), sizeof(ElementType)*len); \
2724 if (isCopy) { \
2725 *isCopy = JNI_TRUE; \
2726 } \
2727 } \
2728 } \
2729 ReturnProbe; \
2730 return result; \
2731 JNI_END
2732
2733 DEFINE_GETSCALARARRAYELEMENTS(T_BOOLEAN, jboolean, Boolean, bool
2734 , HOTSPOT_JNI_GETBOOLEANARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy),
2735 HOTSPOT_JNI_GETBOOLEANARRAYELEMENTS_RETURN((uintptr_t*)result))
2736 DEFINE_GETSCALARARRAYELEMENTS(T_BYTE, jbyte, Byte, byte
2737 , HOTSPOT_JNI_GETBYTEARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy),
2738 HOTSPOT_JNI_GETBYTEARRAYELEMENTS_RETURN((char*)result))
2739 DEFINE_GETSCALARARRAYELEMENTS(T_SHORT, jshort, Short, short
2740 , HOTSPOT_JNI_GETSHORTARRAYELEMENTS_ENTRY(env, (uint16_t*) array, (uintptr_t *) isCopy),
2741 HOTSPOT_JNI_GETSHORTARRAYELEMENTS_RETURN((uint16_t*)result))
2742 DEFINE_GETSCALARARRAYELEMENTS(T_CHAR, jchar, Char, char
2743 , HOTSPOT_JNI_GETCHARARRAYELEMENTS_ENTRY(env, (uint16_t*) array, (uintptr_t *) isCopy),
2744 HOTSPOT_JNI_GETCHARARRAYELEMENTS_RETURN(result))
2745 DEFINE_GETSCALARARRAYELEMENTS(T_INT, jint, Int, int
2746 , HOTSPOT_JNI_GETINTARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy),
2747 HOTSPOT_JNI_GETINTARRAYELEMENTS_RETURN((uint32_t*)result))
2748 DEFINE_GETSCALARARRAYELEMENTS(T_LONG, jlong, Long, long
2749 , HOTSPOT_JNI_GETLONGARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy),
2750 HOTSPOT_JNI_GETLONGARRAYELEMENTS_RETURN(((uintptr_t*)result)))
2751 // Float and double probes don't return value because dtrace doesn't currently support it
2752 DEFINE_GETSCALARARRAYELEMENTS(T_FLOAT, jfloat, Float, float
2753 , HOTSPOT_JNI_GETFLOATARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy),
2754 HOTSPOT_JNI_GETFLOATARRAYELEMENTS_RETURN(result))
2755 DEFINE_GETSCALARARRAYELEMENTS(T_DOUBLE, jdouble, Double, double
2756 , HOTSPOT_JNI_GETDOUBLEARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy),
2757 HOTSPOT_JNI_GETDOUBLEARRAYELEMENTS_RETURN(result))
2758
2759
2760 #define DEFINE_RELEASESCALARARRAYELEMENTS(ElementTag,ElementType,Result,Tag \
2761 , EntryProbe, ReturnProbe);\
2762 \
2763 JNI_QUICK_ENTRY(void, \
2764 jni_Release##Result##ArrayElements(JNIEnv *env, ElementType##Array array, \
2765 ElementType *buf, jint mode)) \
2766 JNIWrapper("Release" XSTR(Result) "ArrayElements"); \
2767 EntryProbe; \
2768 typeArrayOop a = typeArrayOop(JNIHandles::resolve_non_null(array)); \
2769 int len = a->length(); \
2770 if (len != 0) { /* Empty array: nothing to free or copy. */ \
2771 if ((mode == 0) || (mode == JNI_COMMIT)) { \
2772 memcpy(a->Tag##_at_addr(0), buf, sizeof(ElementType)*len); \
2773 } \
2774 if ((mode == 0) || (mode == JNI_ABORT)) { \
2775 FreeHeap(buf); \
2776 } \
2777 } \
2778 ReturnProbe; \
2779 JNI_END
2780
2781 DEFINE_RELEASESCALARARRAYELEMENTS(T_BOOLEAN, jboolean, Boolean, bool
2782 , HOTSPOT_JNI_RELEASEBOOLEANARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) buf, mode),
2783 HOTSPOT_JNI_RELEASEBOOLEANARRAYELEMENTS_RETURN())
2784 DEFINE_RELEASESCALARARRAYELEMENTS(T_BYTE, jbyte, Byte, byte
2785 , HOTSPOT_JNI_RELEASEBYTEARRAYELEMENTS_ENTRY(env, array, (char *) buf, mode),
2786 HOTSPOT_JNI_RELEASEBYTEARRAYELEMENTS_RETURN())
2787 DEFINE_RELEASESCALARARRAYELEMENTS(T_SHORT, jshort, Short, short
2788 , HOTSPOT_JNI_RELEASESHORTARRAYELEMENTS_ENTRY(env, array, (uint16_t *) buf, mode),
2789 HOTSPOT_JNI_RELEASESHORTARRAYELEMENTS_RETURN())
2790 DEFINE_RELEASESCALARARRAYELEMENTS(T_CHAR, jchar, Char, char
2791 , HOTSPOT_JNI_RELEASECHARARRAYELEMENTS_ENTRY(env, array, (uint16_t *) buf, mode),
2792 HOTSPOT_JNI_RELEASECHARARRAYELEMENTS_RETURN())
2793 DEFINE_RELEASESCALARARRAYELEMENTS(T_INT, jint, Int, int
2794 , HOTSPOT_JNI_RELEASEINTARRAYELEMENTS_ENTRY(env, array, (uint32_t *) buf, mode),
2795 HOTSPOT_JNI_RELEASEINTARRAYELEMENTS_RETURN())
2796 DEFINE_RELEASESCALARARRAYELEMENTS(T_LONG, jlong, Long, long
2797 , HOTSPOT_JNI_RELEASELONGARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) buf, mode),
2798 HOTSPOT_JNI_RELEASELONGARRAYELEMENTS_RETURN())
2799 DEFINE_RELEASESCALARARRAYELEMENTS(T_FLOAT, jfloat, Float, float
2800 , HOTSPOT_JNI_RELEASEFLOATARRAYELEMENTS_ENTRY(env, array, (float *) buf, mode),
2801 HOTSPOT_JNI_RELEASEFLOATARRAYELEMENTS_RETURN())
2802 DEFINE_RELEASESCALARARRAYELEMENTS(T_DOUBLE, jdouble, Double, double
2803 , HOTSPOT_JNI_RELEASEDOUBLEARRAYELEMENTS_ENTRY(env, array, (double *) buf, mode),
2804 HOTSPOT_JNI_RELEASEDOUBLEARRAYELEMENTS_RETURN())
2805
2806
2807 #define DEFINE_GETSCALARARRAYREGION(ElementTag,ElementType,Result, Tag \
2808 , EntryProbe, ReturnProbe); \
2809 DT_VOID_RETURN_MARK_DECL(Get##Result##ArrayRegion \
2810 , ReturnProbe); \
2811 \
2812 JNI_ENTRY(void, \
2813 jni_Get##Result##ArrayRegion(JNIEnv *env, ElementType##Array array, jsize start, \
2814 jsize len, ElementType *buf)) \
2815 JNIWrapper("Get" XSTR(Result) "ArrayRegion"); \
2816 EntryProbe; \
2817 DT_VOID_RETURN_MARK(Get##Result##ArrayRegion); \
2818 typeArrayOop src = typeArrayOop(JNIHandles::resolve_non_null(array)); \
2819 if (start < 0 || len < 0 || ((unsigned int)start + (unsigned int)len > (unsigned int)src->length())) { \
2820 THROW(vmSymbols::java_lang_ArrayIndexOutOfBoundsException()); \
2821 } else { \
2822 if (len > 0) { \
2823 int sc = TypeArrayKlass::cast(src->klass())->log2_element_size(); \
2824 memcpy((u_char*) buf, \
2825 (u_char*) src->Tag##_at_addr(start), \
2826 len << sc); \
2827 } \
2828 } \
2829 JNI_END
2830
2831 DEFINE_GETSCALARARRAYREGION(T_BOOLEAN, jboolean,Boolean, bool
2832 , HOTSPOT_JNI_GETBOOLEANARRAYREGION_ENTRY(env, array, start, len, (uintptr_t *) buf),
2833 HOTSPOT_JNI_GETBOOLEANARRAYREGION_RETURN());
2834 DEFINE_GETSCALARARRAYREGION(T_BYTE, jbyte, Byte, byte
2835 , HOTSPOT_JNI_GETBYTEARRAYREGION_ENTRY(env, array, start, len, (char *) buf),
2836 HOTSPOT_JNI_GETBYTEARRAYREGION_RETURN());
2837 DEFINE_GETSCALARARRAYREGION(T_SHORT, jshort, Short, short
2838 , HOTSPOT_JNI_GETSHORTARRAYREGION_ENTRY(env, array, start, len, (uint16_t *) buf),
2839 HOTSPOT_JNI_GETSHORTARRAYREGION_RETURN());
2840 DEFINE_GETSCALARARRAYREGION(T_CHAR, jchar, Char, char
2841 , HOTSPOT_JNI_GETCHARARRAYREGION_ENTRY(env, array, start, len, (uint16_t*) buf),
2842 HOTSPOT_JNI_GETCHARARRAYREGION_RETURN());
2843 DEFINE_GETSCALARARRAYREGION(T_INT, jint, Int, int
2844 , HOTSPOT_JNI_GETINTARRAYREGION_ENTRY(env, array, start, len, (uint32_t*) buf),
2845 HOTSPOT_JNI_GETINTARRAYREGION_RETURN());
2846 DEFINE_GETSCALARARRAYREGION(T_LONG, jlong, Long, long
2847 , HOTSPOT_JNI_GETLONGARRAYREGION_ENTRY(env, array, start, len, (uintptr_t *) buf),
2848 HOTSPOT_JNI_GETLONGARRAYREGION_RETURN());
2849 DEFINE_GETSCALARARRAYREGION(T_FLOAT, jfloat, Float, float
2850 , HOTSPOT_JNI_GETFLOATARRAYREGION_ENTRY(env, array, start, len, (float *) buf),
2851 HOTSPOT_JNI_GETFLOATARRAYREGION_RETURN());
2852 DEFINE_GETSCALARARRAYREGION(T_DOUBLE, jdouble, Double, double
2853 , HOTSPOT_JNI_GETDOUBLEARRAYREGION_ENTRY(env, array, start, len, (double *) buf),
2854 HOTSPOT_JNI_GETDOUBLEARRAYREGION_RETURN());
2855
2856
2857 #define DEFINE_SETSCALARARRAYREGION(ElementTag,ElementType,Result, Tag \
2858 , EntryProbe, ReturnProbe); \
2859 DT_VOID_RETURN_MARK_DECL(Set##Result##ArrayRegion \
2860 ,ReturnProbe); \
2861 \
2862 JNI_ENTRY(void, \
2863 jni_Set##Result##ArrayRegion(JNIEnv *env, ElementType##Array array, jsize start, \
2864 jsize len, const ElementType *buf)) \
2865 JNIWrapper("Set" XSTR(Result) "ArrayRegion"); \
2866 EntryProbe; \
2867 DT_VOID_RETURN_MARK(Set##Result##ArrayRegion); \
2868 typeArrayOop dst = typeArrayOop(JNIHandles::resolve_non_null(array)); \
2869 if (start < 0 || len < 0 || ((unsigned int)start + (unsigned int)len > (unsigned int)dst->length())) { \
2870 THROW(vmSymbols::java_lang_ArrayIndexOutOfBoundsException()); \
2871 } else { \
2872 if (len > 0) { \
2873 int sc = TypeArrayKlass::cast(dst->klass())->log2_element_size(); \
2874 memcpy((u_char*) dst->Tag##_at_addr(start), \
2875 (u_char*) buf, \
2876 len << sc); \
2877 } \
2878 } \
2879 JNI_END
2880
2881 DEFINE_SETSCALARARRAYREGION(T_BOOLEAN, jboolean, Boolean, bool
2882 , HOTSPOT_JNI_SETBOOLEANARRAYREGION_ENTRY(env, array, start, len, (uintptr_t *)buf),
2883 HOTSPOT_JNI_SETBOOLEANARRAYREGION_RETURN())
2884 DEFINE_SETSCALARARRAYREGION(T_BYTE, jbyte, Byte, byte
2885 , HOTSPOT_JNI_SETBYTEARRAYREGION_ENTRY(env, array, start, len, (char *) buf),
2886 HOTSPOT_JNI_SETBYTEARRAYREGION_RETURN())
2887 DEFINE_SETSCALARARRAYREGION(T_SHORT, jshort, Short, short
2888 , HOTSPOT_JNI_SETSHORTARRAYREGION_ENTRY(env, array, start, len, (uint16_t *) buf),
2889 HOTSPOT_JNI_SETSHORTARRAYREGION_RETURN())
2890 DEFINE_SETSCALARARRAYREGION(T_CHAR, jchar, Char, char
2891 , HOTSPOT_JNI_SETCHARARRAYREGION_ENTRY(env, array, start, len, (uint16_t *) buf),
2892 HOTSPOT_JNI_SETCHARARRAYREGION_RETURN())
2893 DEFINE_SETSCALARARRAYREGION(T_INT, jint, Int, int
2894 , HOTSPOT_JNI_SETINTARRAYREGION_ENTRY(env, array, start, len, (uint32_t *) buf),
2895 HOTSPOT_JNI_SETINTARRAYREGION_RETURN())
2896 DEFINE_SETSCALARARRAYREGION(T_LONG, jlong, Long, long
2897 , HOTSPOT_JNI_SETLONGARRAYREGION_ENTRY(env, array, start, len, (uintptr_t *) buf),
2898 HOTSPOT_JNI_SETLONGARRAYREGION_RETURN())
2899 DEFINE_SETSCALARARRAYREGION(T_FLOAT, jfloat, Float, float
2900 , HOTSPOT_JNI_SETFLOATARRAYREGION_ENTRY(env, array, start, len, (float *) buf),
2901 HOTSPOT_JNI_SETFLOATARRAYREGION_RETURN())
2902 DEFINE_SETSCALARARRAYREGION(T_DOUBLE, jdouble, Double, double
2903 , HOTSPOT_JNI_SETDOUBLEARRAYREGION_ENTRY(env, array, start, len, (double *) buf),
2904 HOTSPOT_JNI_SETDOUBLEARRAYREGION_RETURN())
2905
2906
2907 //
2908 // Interception of natives
2909 //
2910
2911 // The RegisterNatives call being attempted tried to register with a method that
2912 // is not native. Ask JVM TI what prefixes have been specified. Then check
2913 // to see if the native method is now wrapped with the prefixes. See the
2914 // SetNativeMethodPrefix(es) functions in the JVM TI Spec for details.
2915 static Method* find_prefixed_native(KlassHandle k,
2916 Symbol* name, Symbol* signature, TRAPS) {
2917 #if INCLUDE_JVMTI
2918 ResourceMark rm(THREAD);
2919 Method* method;
2920 int name_len = name->utf8_length();
2921 char* name_str = name->as_utf8();
2922 int prefix_count;
2923 char** prefixes = JvmtiExport::get_all_native_method_prefixes(&prefix_count);
2924 for (int i = 0; i < prefix_count; i++) {
2925 char* prefix = prefixes[i];
2926 int prefix_len = (int)strlen(prefix);
2927
2928 // try adding this prefix to the method name and see if it matches another method name
2929 int trial_len = name_len + prefix_len;
2930 char* trial_name_str = NEW_RESOURCE_ARRAY(char, trial_len + 1);
2931 strcpy(trial_name_str, prefix);
2932 strcat(trial_name_str, name_str);
2933 TempNewSymbol trial_name = SymbolTable::probe(trial_name_str, trial_len);
2934 if (trial_name == NULL) {
2935 continue; // no such symbol, so this prefix wasn't used, try the next prefix
2936 }
2937 method = k()->lookup_method(trial_name, signature);
2938 if (method == NULL) {
2939 continue; // signature doesn't match, try the next prefix
2940 }
2941 if (method->is_native()) {
2942 method->set_is_prefixed_native();
2943 return method; // wahoo, we found a prefixed version of the method, return it
2944 }
2945 // found as non-native, so prefix is good, add it, probably just need more prefixes
2946 name_len = trial_len;
2947 name_str = trial_name_str;
2948 }
2949 #endif // INCLUDE_JVMTI
2950 return NULL; // not found
2951 }
2952
2953 static bool register_native(KlassHandle k, Symbol* name, Symbol* signature, address entry, TRAPS) {
2954 Method* method = k()->lookup_method(name, signature);
2955 if (method == NULL) {
2956 ResourceMark rm;
2957 stringStream st;
2958 st.print("Method %s name or signature does not match",
2959 Method::name_and_sig_as_C_string(k(), name, signature));
2960 THROW_MSG_(vmSymbols::java_lang_NoSuchMethodError(), st.as_string(), false);
2961 }
2962 if (!method->is_native()) {
2963 // trying to register to a non-native method, see if a JVM TI agent has added prefix(es)
2964 method = find_prefixed_native(k, name, signature, THREAD);
2965 if (method == NULL) {
2966 ResourceMark rm;
2967 stringStream st;
2968 st.print("Method %s is not declared as native",
2969 Method::name_and_sig_as_C_string(k(), name, signature));
2970 THROW_MSG_(vmSymbols::java_lang_NoSuchMethodError(), st.as_string(), false);
2971 }
2972 }
2973
2974 if (entry != NULL) {
2975 method->set_native_function(entry,
2976 Method::native_bind_event_is_interesting);
2977 } else {
2978 method->clear_native_function();
2979 }
2980 if (PrintJNIResolving) {
2981 ResourceMark rm(THREAD);
2982 tty->print_cr("[Registering JNI native method %s.%s]",
2983 method->method_holder()->external_name(),
2984 method->name()->as_C_string());
2985 }
2986 return true;
2987 }
2988
2989 DT_RETURN_MARK_DECL(RegisterNatives, jint
2990 , HOTSPOT_JNI_REGISTERNATIVES_RETURN(_ret_ref));
2991
2992 JNI_ENTRY(jint, jni_RegisterNatives(JNIEnv *env, jclass clazz,
2993 const JNINativeMethod *methods,
2994 jint nMethods))
2995 JNIWrapper("RegisterNatives");
2996 HOTSPOT_JNI_REGISTERNATIVES_ENTRY(env, clazz, (void *) methods, nMethods);
2997 jint ret = 0;
2998 DT_RETURN_MARK(RegisterNatives, jint, (const jint&)ret);
2999
3000 KlassHandle h_k(thread, java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz)));
3001
3002 for (int index = 0; index < nMethods; index++) {
3003 const char* meth_name = methods[index].name;
3004 const char* meth_sig = methods[index].signature;
3005 int meth_name_len = (int)strlen(meth_name);
3006
3007 // The class should have been loaded (we have an instance of the class
3008 // passed in) so the method and signature should already be in the symbol
3009 // table. If they're not there, the method doesn't exist.
3010 TempNewSymbol name = SymbolTable::probe(meth_name, meth_name_len);
3011 TempNewSymbol signature = SymbolTable::probe(meth_sig, (int)strlen(meth_sig));
3012
3013 if (name == NULL || signature == NULL) {
3014 ResourceMark rm;
3015 stringStream st;
3016 st.print("Method %s.%s%s not found", h_k()->external_name(), meth_name, meth_sig);
3017 // Must return negative value on failure
3018 THROW_MSG_(vmSymbols::java_lang_NoSuchMethodError(), st.as_string(), -1);
3019 }
3020
3021 bool res = register_native(h_k, name, signature,
3022 (address) methods[index].fnPtr, THREAD);
3023 if (!res) {
3024 ret = -1;
3025 break;
3026 }
3027 }
3028 return ret;
3029 JNI_END
3030
3031
3032 JNI_ENTRY(jint, jni_UnregisterNatives(JNIEnv *env, jclass clazz))
3033 JNIWrapper("UnregisterNatives");
3034 HOTSPOT_JNI_UNREGISTERNATIVES_ENTRY(env, clazz);
3035 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz));
3036 //%note jni_2
3037 if (k->is_instance_klass()) {
3038 for (int index = 0; index < InstanceKlass::cast(k)->methods()->length(); index++) {
3039 Method* m = InstanceKlass::cast(k)->methods()->at(index);
3040 if (m->is_native()) {
3041 m->clear_native_function();
3042 m->set_signature_handler(NULL);
3043 }
3044 }
3045 }
3046 HOTSPOT_JNI_UNREGISTERNATIVES_RETURN(0);
3047 return 0;
3048 JNI_END
3049
3050 //
3051 // Monitor functions
3052 //
3053
3054 DT_RETURN_MARK_DECL(MonitorEnter, jint
3055 , HOTSPOT_JNI_MONITORENTER_RETURN(_ret_ref));
3056
3057 JNI_ENTRY(jint, jni_MonitorEnter(JNIEnv *env, jobject jobj))
3058 HOTSPOT_JNI_MONITORENTER_ENTRY(env, jobj);
3059 jint ret = JNI_ERR;
3060 DT_RETURN_MARK(MonitorEnter, jint, (const jint&)ret);
3061
3062 // If the object is null, we can't do anything with it
3063 if (jobj == NULL) {
3064 THROW_(vmSymbols::java_lang_NullPointerException(), JNI_ERR);
3065 }
3066
3067 Handle obj(thread, JNIHandles::resolve_non_null(jobj));
3068 ObjectSynchronizer::jni_enter(obj, CHECK_(JNI_ERR));
3069 ret = JNI_OK;
3070 return ret;
3071 JNI_END
3072
3073 DT_RETURN_MARK_DECL(MonitorExit, jint
3074 , HOTSPOT_JNI_MONITOREXIT_RETURN(_ret_ref));
3075
3076 JNI_ENTRY(jint, jni_MonitorExit(JNIEnv *env, jobject jobj))
3077 HOTSPOT_JNI_MONITOREXIT_ENTRY(env, jobj);
3078 jint ret = JNI_ERR;
3079 DT_RETURN_MARK(MonitorExit, jint, (const jint&)ret);
3080
3081 // Don't do anything with a null object
3082 if (jobj == NULL) {
3083 THROW_(vmSymbols::java_lang_NullPointerException(), JNI_ERR);
3084 }
3085
3086 Handle obj(THREAD, JNIHandles::resolve_non_null(jobj));
3087 ObjectSynchronizer::jni_exit(obj(), CHECK_(JNI_ERR));
3088
3089 ret = JNI_OK;
3090 return ret;
3091 JNI_END
3092
3093 //
3094 // Extensions
3095 //
3096
3097 DT_VOID_RETURN_MARK_DECL(GetStringRegion
3098 , HOTSPOT_JNI_GETSTRINGREGION_RETURN());
3099
3100 JNI_ENTRY(void, jni_GetStringRegion(JNIEnv *env, jstring string, jsize start, jsize len, jchar *buf))
3101 JNIWrapper("GetStringRegion");
3102 HOTSPOT_JNI_GETSTRINGREGION_ENTRY(env, string, start, len, buf);
3103 DT_VOID_RETURN_MARK(GetStringRegion);
3104 oop s = JNIHandles::resolve_non_null(string);
3105 int s_len = java_lang_String::length(s);
3106 if (start < 0 || len < 0 || start + len > s_len) {
3107 THROW(vmSymbols::java_lang_StringIndexOutOfBoundsException());
3108 } else {
3109 if (len > 0) {
3110 typeArrayOop s_value = java_lang_String::value(s);
3111 bool is_latin1 = java_lang_String::is_latin1(s);
3112 if (!is_latin1) {
3113 memcpy(buf, s_value->char_at_addr(start), sizeof(jchar)*len);
3114 } else {
3115 for (int i = 0; i < len; i++) {
3116 buf[i] = ((jchar) s_value->byte_at(i + start)) & 0xff;
3117 }
3118 }
3119 }
3120 }
3121 JNI_END
3122
3123 DT_VOID_RETURN_MARK_DECL(GetStringUTFRegion
3124 , HOTSPOT_JNI_GETSTRINGUTFREGION_RETURN());
3125
3126 JNI_ENTRY(void, jni_GetStringUTFRegion(JNIEnv *env, jstring string, jsize start, jsize len, char *buf))
3127 JNIWrapper("GetStringUTFRegion");
3128 HOTSPOT_JNI_GETSTRINGUTFREGION_ENTRY(env, string, start, len, buf);
3129 DT_VOID_RETURN_MARK(GetStringUTFRegion);
3130 oop s = JNIHandles::resolve_non_null(string);
3131 int s_len = java_lang_String::length(s);
3132 if (start < 0 || len < 0 || start + len > s_len) {
3133 THROW(vmSymbols::java_lang_StringIndexOutOfBoundsException());
3134 } else {
3135 //%note jni_7
3136 if (len > 0) {
3137 // Assume the buffer is large enough as the JNI spec. does not require user error checking
3138 java_lang_String::as_utf8_string(s, start, len, buf, INT_MAX);
3139 // as_utf8_string null-terminates the result string
3140 } else {
3141 // JDK null-terminates the buffer even in len is zero
3142 if (buf != NULL) {
3143 buf[0] = 0;
3144 }
3145 }
3146 }
3147 JNI_END
3148
3149
3150 JNI_ENTRY(void*, jni_GetPrimitiveArrayCritical(JNIEnv *env, jarray array, jboolean *isCopy))
3151 JNIWrapper("GetPrimitiveArrayCritical");
3152 HOTSPOT_JNI_GETPRIMITIVEARRAYCRITICAL_ENTRY(env, array, (uintptr_t *) isCopy);
3153 GCLocker::lock_critical(thread);
3154 if (isCopy != NULL) {
3155 *isCopy = JNI_FALSE;
3156 }
3157 oop a = JNIHandles::resolve_non_null(array);
3158 assert(a->is_array(), "just checking");
3159 BasicType type;
3160 if (a->is_objArray()) {
3161 type = T_OBJECT;
3162 } else {
3163 type = TypeArrayKlass::cast(a->klass())->element_type();
3164 }
3165 void* ret = arrayOop(a)->base(type);
3166 HOTSPOT_JNI_GETPRIMITIVEARRAYCRITICAL_RETURN(ret);
3167 return ret;
3168 JNI_END
3169
3170
3171 JNI_ENTRY(void, jni_ReleasePrimitiveArrayCritical(JNIEnv *env, jarray array, void *carray, jint mode))
3172 JNIWrapper("ReleasePrimitiveArrayCritical");
3173 HOTSPOT_JNI_RELEASEPRIMITIVEARRAYCRITICAL_ENTRY(env, array, carray, mode);
3174 // The array, carray and mode arguments are ignored
3175 GCLocker::unlock_critical(thread);
3176 HOTSPOT_JNI_RELEASEPRIMITIVEARRAYCRITICAL_RETURN();
3177 JNI_END
3178
3179
3180 JNI_ENTRY(const jchar*, jni_GetStringCritical(JNIEnv *env, jstring string, jboolean *isCopy))
3181 JNIWrapper("GetStringCritical");
3182 HOTSPOT_JNI_GETSTRINGCRITICAL_ENTRY(env, string, (uintptr_t *) isCopy);
3183 GCLocker::lock_critical(thread);
3184 oop s = JNIHandles::resolve_non_null(string);
3185 typeArrayOop s_value = java_lang_String::value(s);
3186 bool is_latin1 = java_lang_String::is_latin1(s);
3187 if (isCopy != NULL) {
3188 *isCopy = is_latin1 ? JNI_TRUE : JNI_FALSE;
3189 }
3190 jchar* ret;
3191 if (!is_latin1) {
3192 ret = (jchar*) s_value->base(T_CHAR);
3193 } else {
3194 // Inflate latin1 encoded string to UTF16
3195 int s_len = java_lang_String::length(s);
3196 ret = NEW_C_HEAP_ARRAY_RETURN_NULL(jchar, s_len + 1, mtInternal); // add one for zero termination
3197 /* JNI Specification states return NULL on OOM */
3198 if (ret != NULL) {
3199 for (int i = 0; i < s_len; i++) {
3200 ret[i] = ((jchar) s_value->byte_at(i)) & 0xff;
3201 }
3202 ret[s_len] = 0;
3203 }
3204 }
3205 HOTSPOT_JNI_GETSTRINGCRITICAL_RETURN((uint16_t *) ret);
3206 return ret;
3207 JNI_END
3208
3209
3210 JNI_ENTRY(void, jni_ReleaseStringCritical(JNIEnv *env, jstring str, const jchar *chars))
3211 JNIWrapper("ReleaseStringCritical");
3212 HOTSPOT_JNI_RELEASESTRINGCRITICAL_ENTRY(env, str, (uint16_t *) chars);
3213 // The str and chars arguments are ignored for UTF16 strings
3214 oop s = JNIHandles::resolve_non_null(str);
3215 bool is_latin1 = java_lang_String::is_latin1(s);
3216 if (is_latin1) {
3217 // For latin1 string, free jchar array allocated by earlier call to GetStringCritical.
3218 // This assumes that ReleaseStringCritical bookends GetStringCritical.
3219 FREE_C_HEAP_ARRAY(jchar, chars);
3220 }
3221 GCLocker::unlock_critical(thread);
3222 HOTSPOT_JNI_RELEASESTRINGCRITICAL_RETURN();
3223 JNI_END
3224
3225
3226 JNI_ENTRY(jweak, jni_NewWeakGlobalRef(JNIEnv *env, jobject ref))
3227 JNIWrapper("jni_NewWeakGlobalRef");
3228 HOTSPOT_JNI_NEWWEAKGLOBALREF_ENTRY(env, ref);
3229 Handle ref_handle(thread, JNIHandles::resolve(ref));
3230 jweak ret = JNIHandles::make_weak_global(ref_handle);
3231 HOTSPOT_JNI_NEWWEAKGLOBALREF_RETURN(ret);
3232 return ret;
3233 JNI_END
3234
3235 // Must be JNI_ENTRY (with HandleMark)
3236 JNI_ENTRY(void, jni_DeleteWeakGlobalRef(JNIEnv *env, jweak ref))
3237 JNIWrapper("jni_DeleteWeakGlobalRef");
3238 HOTSPOT_JNI_DELETEWEAKGLOBALREF_ENTRY(env, ref);
3239 JNIHandles::destroy_weak_global(ref);
3240 HOTSPOT_JNI_DELETEWEAKGLOBALREF_RETURN();
3241 JNI_END
3242
3243
3244 JNI_QUICK_ENTRY(jboolean, jni_ExceptionCheck(JNIEnv *env))
3245 JNIWrapper("jni_ExceptionCheck");
3246 HOTSPOT_JNI_EXCEPTIONCHECK_ENTRY(env);
3247 jni_check_async_exceptions(thread);
3248 jboolean ret = (thread->has_pending_exception()) ? JNI_TRUE : JNI_FALSE;
3249 HOTSPOT_JNI_EXCEPTIONCHECK_RETURN(ret);
3250 return ret;
3251 JNI_END
3252
3253
3254 // Initialization state for three routines below relating to
3255 // java.nio.DirectBuffers
3256 static jint directBufferSupportInitializeStarted = 0;
3257 static volatile jint directBufferSupportInitializeEnded = 0;
3258 static volatile jint directBufferSupportInitializeFailed = 0;
3259 static jclass bufferClass = NULL;
3260 static jclass directBufferClass = NULL;
3261 static jclass directByteBufferClass = NULL;
3262 static jmethodID directByteBufferConstructor = NULL;
3263 static jfieldID directBufferAddressField = NULL;
3264 static jfieldID bufferCapacityField = NULL;
3265
3266 static jclass lookupOne(JNIEnv* env, const char* name, TRAPS) {
3267 Handle loader; // null (bootstrap) loader
3268 Handle protection_domain; // null protection domain
3269
3270 TempNewSymbol sym = SymbolTable::new_symbol(name, CHECK_NULL);
3271 jclass result = find_class_from_class_loader(env, sym, true, loader, protection_domain, true, CHECK_NULL);
3272
3273 if (log_is_enabled(Debug, classresolve) && result != NULL) {
3274 trace_class_resolution(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(result)));
3275 }
3276 return result;
3277 }
3278
3279 // These lookups are done with the NULL (bootstrap) ClassLoader to
3280 // circumvent any security checks that would be done by jni_FindClass.
3281 JNI_ENTRY(bool, lookupDirectBufferClasses(JNIEnv* env))
3282 {
3283 if ((bufferClass = lookupOne(env, "java/nio/Buffer", thread)) == NULL) { return false; }
3284 if ((directBufferClass = lookupOne(env, "sun/nio/ch/DirectBuffer", thread)) == NULL) { return false; }
3285 if ((directByteBufferClass = lookupOne(env, "java/nio/DirectByteBuffer", thread)) == NULL) { return false; }
3286 return true;
3287 }
3288 JNI_END
3289
3290
3291 static bool initializeDirectBufferSupport(JNIEnv* env, JavaThread* thread) {
3292 if (directBufferSupportInitializeFailed) {
3293 return false;
3294 }
3295
3296 if (Atomic::cmpxchg(1, &directBufferSupportInitializeStarted, 0) == 0) {
3297 if (!lookupDirectBufferClasses(env)) {
3298 directBufferSupportInitializeFailed = 1;
3299 return false;
3300 }
3301
3302 // Make global references for these
3303 bufferClass = (jclass) env->NewGlobalRef(bufferClass);
3304 directBufferClass = (jclass) env->NewGlobalRef(directBufferClass);
3305 directByteBufferClass = (jclass) env->NewGlobalRef(directByteBufferClass);
3306
3307 // Get needed field and method IDs
3308 directByteBufferConstructor = env->GetMethodID(directByteBufferClass, "<init>", "(JI)V");
3309 if (env->ExceptionCheck()) {
3310 env->ExceptionClear();
3311 directBufferSupportInitializeFailed = 1;
3312 return false;
3313 }
3314 directBufferAddressField = env->GetFieldID(bufferClass, "address", "J");
3315 if (env->ExceptionCheck()) {
3316 env->ExceptionClear();
3317 directBufferSupportInitializeFailed = 1;
3318 return false;
3319 }
3320 bufferCapacityField = env->GetFieldID(bufferClass, "capacity", "I");
3321 if (env->ExceptionCheck()) {
3322 env->ExceptionClear();
3323 directBufferSupportInitializeFailed = 1;
3324 return false;
3325 }
3326
3327 if ((directByteBufferConstructor == NULL) ||
3328 (directBufferAddressField == NULL) ||
3329 (bufferCapacityField == NULL)) {
3330 directBufferSupportInitializeFailed = 1;
3331 return false;
3332 }
3333
3334 directBufferSupportInitializeEnded = 1;
3335 } else {
3336 while (!directBufferSupportInitializeEnded && !directBufferSupportInitializeFailed) {
3337 os::naked_yield();
3338 }
3339 }
3340
3341 return !directBufferSupportInitializeFailed;
3342 }
3343
3344 extern "C" jobject JNICALL jni_NewDirectByteBuffer(JNIEnv *env, void* address, jlong capacity)
3345 {
3346 // thread_from_jni_environment() will block if VM is gone.
3347 JavaThread* thread = JavaThread::thread_from_jni_environment(env);
3348
3349 JNIWrapper("jni_NewDirectByteBuffer");
3350 HOTSPOT_JNI_NEWDIRECTBYTEBUFFER_ENTRY(env, address, capacity);
3351
3352 if (!directBufferSupportInitializeEnded) {
3353 if (!initializeDirectBufferSupport(env, thread)) {
3354 HOTSPOT_JNI_NEWDIRECTBYTEBUFFER_RETURN(NULL);
3355 return NULL;
3356 }
3357 }
3358
3359 // Being paranoid about accidental sign extension on address
3360 jlong addr = (jlong) ((uintptr_t) address);
3361 // NOTE that package-private DirectByteBuffer constructor currently
3362 // takes int capacity
3363 jint cap = (jint) capacity;
3364 jobject ret = env->NewObject(directByteBufferClass, directByteBufferConstructor, addr, cap);
3365 HOTSPOT_JNI_NEWDIRECTBYTEBUFFER_RETURN(ret);
3366 return ret;
3367 }
3368
3369 DT_RETURN_MARK_DECL(GetDirectBufferAddress, void*
3370 , HOTSPOT_JNI_GETDIRECTBUFFERADDRESS_RETURN((void*) _ret_ref));
3371
3372 extern "C" void* JNICALL jni_GetDirectBufferAddress(JNIEnv *env, jobject buf)
3373 {
3374 // thread_from_jni_environment() will block if VM is gone.
3375 JavaThread* thread = JavaThread::thread_from_jni_environment(env);
3376
3377 JNIWrapper("jni_GetDirectBufferAddress");
3378 HOTSPOT_JNI_GETDIRECTBUFFERADDRESS_ENTRY(env, buf);
3379 void* ret = NULL;
3380 DT_RETURN_MARK(GetDirectBufferAddress, void*, (const void*&)ret);
3381
3382 if (!directBufferSupportInitializeEnded) {
3383 if (!initializeDirectBufferSupport(env, thread)) {
3384 return 0;
3385 }
3386 }
3387
3388 if ((buf != NULL) && (!env->IsInstanceOf(buf, directBufferClass))) {
3389 return 0;
3390 }
3391
3392 ret = (void*)(intptr_t)env->GetLongField(buf, directBufferAddressField);
3393 return ret;
3394 }
3395
3396 DT_RETURN_MARK_DECL(GetDirectBufferCapacity, jlong
3397 , HOTSPOT_JNI_GETDIRECTBUFFERCAPACITY_RETURN(_ret_ref));
3398
3399 extern "C" jlong JNICALL jni_GetDirectBufferCapacity(JNIEnv *env, jobject buf)
3400 {
3401 // thread_from_jni_environment() will block if VM is gone.
3402 JavaThread* thread = JavaThread::thread_from_jni_environment(env);
3403
3404 JNIWrapper("jni_GetDirectBufferCapacity");
3405 HOTSPOT_JNI_GETDIRECTBUFFERCAPACITY_ENTRY(env, buf);
3406 jlong ret = -1;
3407 DT_RETURN_MARK(GetDirectBufferCapacity, jlong, (const jlong&)ret);
3408
3409 if (!directBufferSupportInitializeEnded) {
3410 if (!initializeDirectBufferSupport(env, thread)) {
3411 ret = 0;
3412 return ret;
3413 }
3414 }
3415
3416 if (buf == NULL) {
3417 return -1;
3418 }
3419
3420 if (!env->IsInstanceOf(buf, directBufferClass)) {
3421 return -1;
3422 }
3423
3424 // NOTE that capacity is currently an int in the implementation
3425 ret = env->GetIntField(buf, bufferCapacityField);
3426 return ret;
3427 }
3428
3429
3430 JNI_LEAF(jint, jni_GetVersion(JNIEnv *env))
3431 JNIWrapper("GetVersion");
3432 HOTSPOT_JNI_GETVERSION_ENTRY(env);
3433 HOTSPOT_JNI_GETVERSION_RETURN(CurrentVersion);
3434 return CurrentVersion;
3435 JNI_END
3436
3437 extern struct JavaVM_ main_vm;
3438
3439 JNI_LEAF(jint, jni_GetJavaVM(JNIEnv *env, JavaVM **vm))
3440 JNIWrapper("jni_GetJavaVM");
3441 HOTSPOT_JNI_GETJAVAVM_ENTRY(env, (void **) vm);
3442 *vm = (JavaVM *)(&main_vm);
3443 HOTSPOT_JNI_GETJAVAVM_RETURN(JNI_OK);
3444 return JNI_OK;
3445 JNI_END
3446
3447 // Structure containing all jni functions
3448 struct JNINativeInterface_ jni_NativeInterface = {
3449 NULL,
3450 NULL,
3451 NULL,
3452
3453 NULL,
3454
3455 jni_GetVersion,
3456
3457 jni_DefineClass,
3458 jni_FindClass,
3459
3460 jni_FromReflectedMethod,
3461 jni_FromReflectedField,
3462
3463 jni_ToReflectedMethod,
3464
3465 jni_GetSuperclass,
3466 jni_IsAssignableFrom,
3467
3468 jni_ToReflectedField,
3469
3470 jni_Throw,
3471 jni_ThrowNew,
3472 jni_ExceptionOccurred,
3473 jni_ExceptionDescribe,
3474 jni_ExceptionClear,
3475 jni_FatalError,
3476
3477 jni_PushLocalFrame,
3478 jni_PopLocalFrame,
3479
3480 jni_NewGlobalRef,
3481 jni_DeleteGlobalRef,
3482 jni_DeleteLocalRef,
3483 jni_IsSameObject,
3484
3485 jni_NewLocalRef,
3486 jni_EnsureLocalCapacity,
3487
3488 jni_AllocObject,
3489 jni_NewObject,
3490 jni_NewObjectV,
3491 jni_NewObjectA,
3492
3493 jni_GetObjectClass,
3494 jni_IsInstanceOf,
3495
3496 jni_GetMethodID,
3497
3498 jni_CallObjectMethod,
3499 jni_CallObjectMethodV,
3500 jni_CallObjectMethodA,
3501 jni_CallBooleanMethod,
3502 jni_CallBooleanMethodV,
3503 jni_CallBooleanMethodA,
3504 jni_CallByteMethod,
3505 jni_CallByteMethodV,
3506 jni_CallByteMethodA,
3507 jni_CallCharMethod,
3508 jni_CallCharMethodV,
3509 jni_CallCharMethodA,
3510 jni_CallShortMethod,
3511 jni_CallShortMethodV,
3512 jni_CallShortMethodA,
3513 jni_CallIntMethod,
3514 jni_CallIntMethodV,
3515 jni_CallIntMethodA,
3516 jni_CallLongMethod,
3517 jni_CallLongMethodV,
3518 jni_CallLongMethodA,
3519 jni_CallFloatMethod,
3520 jni_CallFloatMethodV,
3521 jni_CallFloatMethodA,
3522 jni_CallDoubleMethod,
3523 jni_CallDoubleMethodV,
3524 jni_CallDoubleMethodA,
3525 jni_CallVoidMethod,
3526 jni_CallVoidMethodV,
3527 jni_CallVoidMethodA,
3528
3529 jni_CallNonvirtualObjectMethod,
3530 jni_CallNonvirtualObjectMethodV,
3531 jni_CallNonvirtualObjectMethodA,
3532 jni_CallNonvirtualBooleanMethod,
3533 jni_CallNonvirtualBooleanMethodV,
3534 jni_CallNonvirtualBooleanMethodA,
3535 jni_CallNonvirtualByteMethod,
3536 jni_CallNonvirtualByteMethodV,
3537 jni_CallNonvirtualByteMethodA,
3538 jni_CallNonvirtualCharMethod,
3539 jni_CallNonvirtualCharMethodV,
3540 jni_CallNonvirtualCharMethodA,
3541 jni_CallNonvirtualShortMethod,
3542 jni_CallNonvirtualShortMethodV,
3543 jni_CallNonvirtualShortMethodA,
3544 jni_CallNonvirtualIntMethod,
3545 jni_CallNonvirtualIntMethodV,
3546 jni_CallNonvirtualIntMethodA,
3547 jni_CallNonvirtualLongMethod,
3548 jni_CallNonvirtualLongMethodV,
3549 jni_CallNonvirtualLongMethodA,
3550 jni_CallNonvirtualFloatMethod,
3551 jni_CallNonvirtualFloatMethodV,
3552 jni_CallNonvirtualFloatMethodA,
3553 jni_CallNonvirtualDoubleMethod,
3554 jni_CallNonvirtualDoubleMethodV,
3555 jni_CallNonvirtualDoubleMethodA,
3556 jni_CallNonvirtualVoidMethod,
3557 jni_CallNonvirtualVoidMethodV,
3558 jni_CallNonvirtualVoidMethodA,
3559
3560 jni_GetFieldID,
3561
3562 jni_GetObjectField,
3563 jni_GetBooleanField,
3564 jni_GetByteField,
3565 jni_GetCharField,
3566 jni_GetShortField,
3567 jni_GetIntField,
3568 jni_GetLongField,
3569 jni_GetFloatField,
3570 jni_GetDoubleField,
3571
3572 jni_SetObjectField,
3573 jni_SetBooleanField,
3574 jni_SetByteField,
3575 jni_SetCharField,
3576 jni_SetShortField,
3577 jni_SetIntField,
3578 jni_SetLongField,
3579 jni_SetFloatField,
3580 jni_SetDoubleField,
3581
3582 jni_GetStaticMethodID,
3583
3584 jni_CallStaticObjectMethod,
3585 jni_CallStaticObjectMethodV,
3586 jni_CallStaticObjectMethodA,
3587 jni_CallStaticBooleanMethod,
3588 jni_CallStaticBooleanMethodV,
3589 jni_CallStaticBooleanMethodA,
3590 jni_CallStaticByteMethod,
3591 jni_CallStaticByteMethodV,
3592 jni_CallStaticByteMethodA,
3593 jni_CallStaticCharMethod,
3594 jni_CallStaticCharMethodV,
3595 jni_CallStaticCharMethodA,
3596 jni_CallStaticShortMethod,
3597 jni_CallStaticShortMethodV,
3598 jni_CallStaticShortMethodA,
3599 jni_CallStaticIntMethod,
3600 jni_CallStaticIntMethodV,
3601 jni_CallStaticIntMethodA,
3602 jni_CallStaticLongMethod,
3603 jni_CallStaticLongMethodV,
3604 jni_CallStaticLongMethodA,
3605 jni_CallStaticFloatMethod,
3606 jni_CallStaticFloatMethodV,
3607 jni_CallStaticFloatMethodA,
3608 jni_CallStaticDoubleMethod,
3609 jni_CallStaticDoubleMethodV,
3610 jni_CallStaticDoubleMethodA,
3611 jni_CallStaticVoidMethod,
3612 jni_CallStaticVoidMethodV,
3613 jni_CallStaticVoidMethodA,
3614
3615 jni_GetStaticFieldID,
3616
3617 jni_GetStaticObjectField,
3618 jni_GetStaticBooleanField,
3619 jni_GetStaticByteField,
3620 jni_GetStaticCharField,
3621 jni_GetStaticShortField,
3622 jni_GetStaticIntField,
3623 jni_GetStaticLongField,
3624 jni_GetStaticFloatField,
3625 jni_GetStaticDoubleField,
3626
3627 jni_SetStaticObjectField,
3628 jni_SetStaticBooleanField,
3629 jni_SetStaticByteField,
3630 jni_SetStaticCharField,
3631 jni_SetStaticShortField,
3632 jni_SetStaticIntField,
3633 jni_SetStaticLongField,
3634 jni_SetStaticFloatField,
3635 jni_SetStaticDoubleField,
3636
3637 jni_NewString,
3638 jni_GetStringLength,
3639 jni_GetStringChars,
3640 jni_ReleaseStringChars,
3641
3642 jni_NewStringUTF,
3643 jni_GetStringUTFLength,
3644 jni_GetStringUTFChars,
3645 jni_ReleaseStringUTFChars,
3646
3647 jni_GetArrayLength,
3648
3649 jni_NewObjectArray,
3650 jni_GetObjectArrayElement,
3651 jni_SetObjectArrayElement,
3652
3653 jni_NewBooleanArray,
3654 jni_NewByteArray,
3655 jni_NewCharArray,
3656 jni_NewShortArray,
3657 jni_NewIntArray,
3658 jni_NewLongArray,
3659 jni_NewFloatArray,
3660 jni_NewDoubleArray,
3661
3662 jni_GetBooleanArrayElements,
3663 jni_GetByteArrayElements,
3664 jni_GetCharArrayElements,
3665 jni_GetShortArrayElements,
3666 jni_GetIntArrayElements,
3667 jni_GetLongArrayElements,
3668 jni_GetFloatArrayElements,
3669 jni_GetDoubleArrayElements,
3670
3671 jni_ReleaseBooleanArrayElements,
3672 jni_ReleaseByteArrayElements,
3673 jni_ReleaseCharArrayElements,
3674 jni_ReleaseShortArrayElements,
3675 jni_ReleaseIntArrayElements,
3676 jni_ReleaseLongArrayElements,
3677 jni_ReleaseFloatArrayElements,
3678 jni_ReleaseDoubleArrayElements,
3679
3680 jni_GetBooleanArrayRegion,
3681 jni_GetByteArrayRegion,
3682 jni_GetCharArrayRegion,
3683 jni_GetShortArrayRegion,
3684 jni_GetIntArrayRegion,
3685 jni_GetLongArrayRegion,
3686 jni_GetFloatArrayRegion,
3687 jni_GetDoubleArrayRegion,
3688
3689 jni_SetBooleanArrayRegion,
3690 jni_SetByteArrayRegion,
3691 jni_SetCharArrayRegion,
3692 jni_SetShortArrayRegion,
3693 jni_SetIntArrayRegion,
3694 jni_SetLongArrayRegion,
3695 jni_SetFloatArrayRegion,
3696 jni_SetDoubleArrayRegion,
3697
3698 jni_RegisterNatives,
3699 jni_UnregisterNatives,
3700
3701 jni_MonitorEnter,
3702 jni_MonitorExit,
3703
3704 jni_GetJavaVM,
3705
3706 jni_GetStringRegion,
3707 jni_GetStringUTFRegion,
3708
3709 jni_GetPrimitiveArrayCritical,
3710 jni_ReleasePrimitiveArrayCritical,
3711
3712 jni_GetStringCritical,
3713 jni_ReleaseStringCritical,
3714
3715 jni_NewWeakGlobalRef,
3716 jni_DeleteWeakGlobalRef,
3717
3718 jni_ExceptionCheck,
3719
3720 jni_NewDirectByteBuffer,
3721 jni_GetDirectBufferAddress,
3722 jni_GetDirectBufferCapacity,
3723
3724 // New 1_6 features
3725
3726 jni_GetObjectRefType
3727 };
3728
3729
3730 // For jvmti use to modify jni function table.
3731 // Java threads in native contiues to run until it is transitioned
3732 // to VM at safepoint. Before the transition or before it is blocked
3733 // for safepoint it may access jni function table. VM could crash if
3734 // any java thread access the jni function table in the middle of memcpy.
3735 // To avoid this each function pointers are copied automically.
3736 void copy_jni_function_table(const struct JNINativeInterface_ *new_jni_NativeInterface) {
3737 assert(SafepointSynchronize::is_at_safepoint(), "must be at safepoint");
3738 intptr_t *a = (intptr_t *) jni_functions();
3739 intptr_t *b = (intptr_t *) new_jni_NativeInterface;
3740 for (uint i=0; i < sizeof(struct JNINativeInterface_)/sizeof(void *); i++) {
3741 Atomic::store_ptr(*b++, a++);
3742 }
3743 }
3744
3745 void quicken_jni_functions() {
3746 // Replace Get<Primitive>Field with fast versions
3747 if (UseFastJNIAccessors && !JvmtiExport::can_post_field_access()
3748 && !VerifyJNIFields && !CountJNICalls && !CheckJNICalls
3749 #if defined(_WINDOWS) && defined(IA32) && defined(COMPILER2)
3750 // windows x86 currently needs SEH wrapper and the gain of the fast
3751 // versions currently isn't certain for server vm on uniprocessor.
3752 && os::is_MP()
3753 #endif
3754 ) {
3755 address func;
3756 func = JNI_FastGetField::generate_fast_get_boolean_field();
3757 if (func != (address)-1) {
3758 jni_NativeInterface.GetBooleanField = (GetBooleanField_t)func;
3759 }
3760 func = JNI_FastGetField::generate_fast_get_byte_field();
3761 if (func != (address)-1) {
3762 jni_NativeInterface.GetByteField = (GetByteField_t)func;
3763 }
3764 func = JNI_FastGetField::generate_fast_get_char_field();
3765 if (func != (address)-1) {
3766 jni_NativeInterface.GetCharField = (GetCharField_t)func;
3767 }
3768 func = JNI_FastGetField::generate_fast_get_short_field();
3769 if (func != (address)-1) {
3770 jni_NativeInterface.GetShortField = (GetShortField_t)func;
3771 }
3772 func = JNI_FastGetField::generate_fast_get_int_field();
3773 if (func != (address)-1) {
3774 jni_NativeInterface.GetIntField = (GetIntField_t)func;
3775 }
3776 func = JNI_FastGetField::generate_fast_get_long_field();
3777 if (func != (address)-1) {
3778 jni_NativeInterface.GetLongField = (GetLongField_t)func;
3779 }
3780 func = JNI_FastGetField::generate_fast_get_float_field();
3781 if (func != (address)-1) {
3782 jni_NativeInterface.GetFloatField = (GetFloatField_t)func;
3783 }
3784 func = JNI_FastGetField::generate_fast_get_double_field();
3785 if (func != (address)-1) {
3786 jni_NativeInterface.GetDoubleField = (GetDoubleField_t)func;
3787 }
3788 }
3789 }
3790
3791 // Returns the function structure
3792 struct JNINativeInterface_* jni_functions() {
3793 #if INCLUDE_JNI_CHECK
3794 if (CheckJNICalls) return jni_functions_check();
3795 #endif // INCLUDE_JNI_CHECK
3796 return &jni_NativeInterface;
3797 }
3798
3799 // Returns the function structure
3800 struct JNINativeInterface_* jni_functions_nocheck() {
3801 return &jni_NativeInterface;
3802 }
3803
3804
3805 // Invocation API
3806
3807
3808 // Forward declaration
3809 extern const struct JNIInvokeInterface_ jni_InvokeInterface;
3810
3811 // Global invocation API vars
3812 volatile jint vm_created = 0;
3813 // Indicate whether it is safe to recreate VM
3814 volatile jint safe_to_recreate_vm = 1;
3815 struct JavaVM_ main_vm = {&jni_InvokeInterface};
3816
3817
3818 #define JAVASTACKSIZE (400 * 1024) /* Default size of a thread java stack */
3819 enum { VERIFY_NONE, VERIFY_REMOTE, VERIFY_ALL };
3820
3821 DT_RETURN_MARK_DECL(GetDefaultJavaVMInitArgs, jint
3822 , HOTSPOT_JNI_GETDEFAULTJAVAVMINITARGS_RETURN(_ret_ref));
3823
3824 _JNI_IMPORT_OR_EXPORT_ jint JNICALL JNI_GetDefaultJavaVMInitArgs(void *args_) {
3825 HOTSPOT_JNI_GETDEFAULTJAVAVMINITARGS_ENTRY(args_);
3826 JDK1_1InitArgs *args = (JDK1_1InitArgs *)args_;
3827 jint ret = JNI_ERR;
3828 DT_RETURN_MARK(GetDefaultJavaVMInitArgs, jint, (const jint&)ret);
3829
3830 if (Threads::is_supported_jni_version(args->version)) {
3831 ret = JNI_OK;
3832 }
3833 // 1.1 style no longer supported in hotspot.
3834 // According the JNI spec, we should update args->version on return.
3835 // We also use the structure to communicate with launcher about default
3836 // stack size.
3837 if (args->version == JNI_VERSION_1_1) {
3838 args->version = JNI_VERSION_1_2;
3839 // javaStackSize is int in arguments structure
3840 assert(jlong(ThreadStackSize) * K < INT_MAX, "integer overflow");
3841 args->javaStackSize = (jint)(ThreadStackSize * K);
3842 }
3843 return ret;
3844 }
3845
3846 DT_RETURN_MARK_DECL(CreateJavaVM, jint
3847 , HOTSPOT_JNI_CREATEJAVAVM_RETURN(_ret_ref));
3848
3849 static jint JNI_CreateJavaVM_inner(JavaVM **vm, void **penv, void *args) {
3850 HOTSPOT_JNI_CREATEJAVAVM_ENTRY((void **) vm, penv, args);
3851
3852 jint result = JNI_ERR;
3853 DT_RETURN_MARK(CreateJavaVM, jint, (const jint&)result);
3854
3855 // We're about to use Atomic::xchg for synchronization. Some Zero
3856 // platforms use the GCC builtin __sync_lock_test_and_set for this,
3857 // but __sync_lock_test_and_set is not guaranteed to do what we want
3858 // on all architectures. So we check it works before relying on it.
3859 #if defined(ZERO) && defined(ASSERT)
3860 {
3861 jint a = 0xcafebabe;
3862 jint b = Atomic::xchg(0xdeadbeef, &a);
3863 void *c = &a;
3864 void *d = Atomic::xchg_ptr(&b, &c);
3865 assert(a == (jint) 0xdeadbeef && b == (jint) 0xcafebabe, "Atomic::xchg() works");
3866 assert(c == &b && d == &a, "Atomic::xchg_ptr() works");
3867 }
3868 #endif // ZERO && ASSERT
3869
3870 // At the moment it's only possible to have one Java VM,
3871 // since some of the runtime state is in global variables.
3872
3873 // We cannot use our mutex locks here, since they only work on
3874 // Threads. We do an atomic compare and exchange to ensure only
3875 // one thread can call this method at a time
3876
3877 // We use Atomic::xchg rather than Atomic::add/dec since on some platforms
3878 // the add/dec implementations are dependent on whether we are running
3879 // on a multiprocessor, and at this stage of initialization the os::is_MP
3880 // function used to determine this will always return false. Atomic::xchg
3881 // does not have this problem.
3882 if (Atomic::xchg(1, &vm_created) == 1) {
3883 return JNI_EEXIST; // already created, or create attempt in progress
3884 }
3885 if (Atomic::xchg(0, &safe_to_recreate_vm) == 0) {
3886 return JNI_ERR; // someone tried and failed and retry not allowed.
3887 }
3888
3889 assert(vm_created == 1, "vm_created is true during the creation");
3890
3891 /**
3892 * Certain errors during initialization are recoverable and do not
3893 * prevent this method from being called again at a later time
3894 * (perhaps with different arguments). However, at a certain
3895 * point during initialization if an error occurs we cannot allow
3896 * this function to be called again (or it will crash). In those
3897 * situations, the 'canTryAgain' flag is set to false, which atomically
3898 * sets safe_to_recreate_vm to 1, such that any new call to
3899 * JNI_CreateJavaVM will immediately fail using the above logic.
3900 */
3901 bool can_try_again = true;
3902
3903 result = Threads::create_vm((JavaVMInitArgs*) args, &can_try_again);
3904 if (result == JNI_OK) {
3905 JavaThread *thread = JavaThread::current();
3906 assert(!thread->has_pending_exception(), "should have returned not OK");
3907 /* thread is thread_in_vm here */
3908 *vm = (JavaVM *)(&main_vm);
3909 *(JNIEnv**)penv = thread->jni_environment();
3910
3911 #if INCLUDE_JVMCI
3912 if (EnableJVMCI) {
3913 if (UseJVMCICompiler) {
3914 // JVMCI is initialized on a CompilerThread
3915 if (BootstrapJVMCI) {
3916 JavaThread* THREAD = thread;
3917 JVMCICompiler* compiler = JVMCICompiler::instance(CATCH);
3918 compiler->bootstrap();
3919 }
3920 }
3921 }
3922 #endif
3923
3924 // Tracks the time application was running before GC
3925 RuntimeService::record_application_start();
3926
3927 // Notify JVMTI
3928 if (JvmtiExport::should_post_thread_life()) {
3929 JvmtiExport::post_thread_start(thread);
3930 }
3931
3932 EventThreadStart event;
3933 if (event.should_commit()) {
3934 event.set_thread(THREAD_TRACE_ID(thread));
3935 event.commit();
3936 }
3937
3938 #ifndef PRODUCT
3939 // Check if we should compile all classes on bootclasspath
3940 if (CompileTheWorld) ClassLoader::compile_the_world();
3941 if (ReplayCompiles) ciReplay::replay(thread);
3942
3943 // Some platforms (like Win*) need a wrapper around these test
3944 // functions in order to properly handle error conditions.
3945 test_error_handler();
3946 if (ExecuteInternalVMTests) {
3947 InternalVMTests::run();
3948 }
3949 #endif
3950
3951 // Since this is not a JVM_ENTRY we have to set the thread state manually before leaving.
3952 ThreadStateTransition::transition_and_fence(thread, _thread_in_vm, _thread_in_native);
3953 } else {
3954 // If create_vm exits because of a pending exception, exit with that
3955 // exception. In the future when we figure out how to reclaim memory,
3956 // we may be able to exit with JNI_ERR and allow the calling application
3957 // to continue.
3958 if (Universe::is_fully_initialized()) {
3959 // otherwise no pending exception possible - VM will already have aborted
3960 JavaThread* THREAD = JavaThread::current();
3961 if (HAS_PENDING_EXCEPTION) {
3962 HandleMark hm;
3963 vm_exit_during_initialization(Handle(THREAD, PENDING_EXCEPTION));
3964 }
3965 }
3966
3967 if (can_try_again) {
3968 // reset safe_to_recreate_vm to 1 so that retrial would be possible
3969 safe_to_recreate_vm = 1;
3970 }
3971
3972 // Creation failed. We must reset vm_created
3973 *vm = 0;
3974 *(JNIEnv**)penv = 0;
3975 // reset vm_created last to avoid race condition. Use OrderAccess to
3976 // control both compiler and architectural-based reordering.
3977 OrderAccess::release_store(&vm_created, 0);
3978 }
3979
3980 // Flush stdout and stderr before exit.
3981 fflush(stdout);
3982 fflush(stderr);
3983
3984 return result;
3985
3986 }
3987
3988 _JNI_IMPORT_OR_EXPORT_ jint JNICALL JNI_CreateJavaVM(JavaVM **vm, void **penv, void *args) {
3989 jint result = 0;
3990 // On Windows, let CreateJavaVM run with SEH protection
3991 #ifdef _WIN32
3992 __try {
3993 #endif
3994 result = JNI_CreateJavaVM_inner(vm, penv, args);
3995 #ifdef _WIN32
3996 } __except(topLevelExceptionFilter((_EXCEPTION_POINTERS*)_exception_info())) {
3997 // Nothing to do.
3998 }
3999 #endif
4000 return result;
4001 }
4002
4003 _JNI_IMPORT_OR_EXPORT_ jint JNICALL JNI_GetCreatedJavaVMs(JavaVM **vm_buf, jsize bufLen, jsize *numVMs) {
4004 // See bug 4367188, the wrapper can sometimes cause VM crashes
4005 // JNIWrapper("GetCreatedJavaVMs");
4006
4007 HOTSPOT_JNI_GETCREATEDJAVAVMS_ENTRY((void **) vm_buf, bufLen, (uintptr_t *) numVMs);
4008
4009 if (vm_created) {
4010 if (numVMs != NULL) *numVMs = 1;
4011 if (bufLen > 0) *vm_buf = (JavaVM *)(&main_vm);
4012 } else {
4013 if (numVMs != NULL) *numVMs = 0;
4014 }
4015 HOTSPOT_JNI_GETCREATEDJAVAVMS_RETURN(JNI_OK);
4016 return JNI_OK;
4017 }
4018
4019 extern "C" {
4020
4021 DT_RETURN_MARK_DECL(DestroyJavaVM, jint
4022 , HOTSPOT_JNI_DESTROYJAVAVM_RETURN(_ret_ref));
4023
4024 jint JNICALL jni_DestroyJavaVM(JavaVM *vm) {
4025 HOTSPOT_JNI_DESTROYJAVAVM_ENTRY(vm);
4026 jint res = JNI_ERR;
4027 DT_RETURN_MARK(DestroyJavaVM, jint, (const jint&)res);
4028
4029 if (!vm_created) {
4030 res = JNI_ERR;
4031 return res;
4032 }
4033
4034 JNIWrapper("DestroyJavaVM");
4035 JNIEnv *env;
4036 JavaVMAttachArgs destroyargs;
4037 destroyargs.version = CurrentVersion;
4038 destroyargs.name = (char *)"DestroyJavaVM";
4039 destroyargs.group = NULL;
4040 res = vm->AttachCurrentThread((void **)&env, (void *)&destroyargs);
4041 if (res != JNI_OK) {
4042 return res;
4043 }
4044
4045 // Since this is not a JVM_ENTRY we have to set the thread state manually before entering.
4046 JavaThread* thread = JavaThread::current();
4047 ThreadStateTransition::transition_from_native(thread, _thread_in_vm);
4048 if (Threads::destroy_vm()) {
4049 // Should not change thread state, VM is gone
4050 vm_created = false;
4051 res = JNI_OK;
4052 return res;
4053 } else {
4054 ThreadStateTransition::transition_and_fence(thread, _thread_in_vm, _thread_in_native);
4055 res = JNI_ERR;
4056 return res;
4057 }
4058 }
4059
4060
4061 static jint attach_current_thread(JavaVM *vm, void **penv, void *_args, bool daemon) {
4062 JavaVMAttachArgs *args = (JavaVMAttachArgs *) _args;
4063
4064 // Check below commented out from JDK1.2fcs as well
4065 /*
4066 if (args && (args->version != JNI_VERSION_1_1 || args->version != JNI_VERSION_1_2)) {
4067 return JNI_EVERSION;
4068 }
4069 */
4070
4071 Thread* t = Thread::current_or_null();
4072 if (t != NULL) {
4073 // If the thread has been attached this operation is a no-op
4074 *(JNIEnv**)penv = ((JavaThread*) t)->jni_environment();
4075 return JNI_OK;
4076 }
4077
4078 // Create a thread and mark it as attaching so it will be skipped by the
4079 // ThreadsListEnumerator - see CR 6404306
4080 JavaThread* thread = new JavaThread(true);
4081
4082 // Set correct safepoint info. The thread is going to call into Java when
4083 // initializing the Java level thread object. Hence, the correct state must
4084 // be set in order for the Safepoint code to deal with it correctly.
4085 thread->set_thread_state(_thread_in_vm);
4086 thread->record_stack_base_and_size();
4087 thread->initialize_thread_current();
4088
4089 if (!os::create_attached_thread(thread)) {
4090 delete thread;
4091 return JNI_ERR;
4092 }
4093 // Enable stack overflow checks
4094 thread->create_stack_guard_pages();
4095
4096 thread->initialize_tlab();
4097
4098 thread->cache_global_variables();
4099
4100 // Crucial that we do not have a safepoint check for this thread, since it has
4101 // not been added to the Thread list yet.
4102 { Threads_lock->lock_without_safepoint_check();
4103 // This must be inside this lock in order to get FullGCALot to work properly, i.e., to
4104 // avoid this thread trying to do a GC before it is added to the thread-list
4105 thread->set_active_handles(JNIHandleBlock::allocate_block());
4106 Threads::add(thread, daemon);
4107 Threads_lock->unlock();
4108 }
4109 // Create thread group and name info from attach arguments
4110 oop group = NULL;
4111 char* thread_name = NULL;
4112 if (args != NULL && Threads::is_supported_jni_version(args->version)) {
4113 group = JNIHandles::resolve(args->group);
4114 thread_name = args->name; // may be NULL
4115 }
4116 if (group == NULL) group = Universe::main_thread_group();
4117
4118 // Create Java level thread object and attach it to this thread
4119 bool attach_failed = false;
4120 {
4121 EXCEPTION_MARK;
4122 HandleMark hm(THREAD);
4123 Handle thread_group(THREAD, group);
4124 thread->allocate_threadObj(thread_group, thread_name, daemon, THREAD);
4125 if (HAS_PENDING_EXCEPTION) {
4126 CLEAR_PENDING_EXCEPTION;
4127 // cleanup outside the handle mark.
4128 attach_failed = true;
4129 }
4130 }
4131
4132 if (attach_failed) {
4133 // Added missing cleanup
4134 thread->cleanup_failed_attach_current_thread();
4135 return JNI_ERR;
4136 }
4137
4138 // mark the thread as no longer attaching
4139 // this uses a fence to push the change through so we don't have
4140 // to regrab the threads_lock
4141 thread->set_done_attaching_via_jni();
4142
4143 // Set java thread status.
4144 java_lang_Thread::set_thread_status(thread->threadObj(),
4145 java_lang_Thread::RUNNABLE);
4146
4147 // Notify the debugger
4148 if (JvmtiExport::should_post_thread_life()) {
4149 JvmtiExport::post_thread_start(thread);
4150 }
4151
4152 EventThreadStart event;
4153 if (event.should_commit()) {
4154 event.set_thread(THREAD_TRACE_ID(thread));
4155 event.commit();
4156 }
4157
4158 *(JNIEnv**)penv = thread->jni_environment();
4159
4160 // Now leaving the VM, so change thread_state. This is normally automatically taken care
4161 // of in the JVM_ENTRY. But in this situation we have to do it manually. Notice, that by
4162 // using ThreadStateTransition::transition, we do a callback to the safepoint code if
4163 // needed.
4164
4165 ThreadStateTransition::transition_and_fence(thread, _thread_in_vm, _thread_in_native);
4166
4167 // Perform any platform dependent FPU setup
4168 os::setup_fpu();
4169
4170 return JNI_OK;
4171 }
4172
4173
4174 jint JNICALL jni_AttachCurrentThread(JavaVM *vm, void **penv, void *_args) {
4175 HOTSPOT_JNI_ATTACHCURRENTTHREAD_ENTRY(vm, penv, _args);
4176 if (!vm_created) {
4177 HOTSPOT_JNI_ATTACHCURRENTTHREAD_RETURN((uint32_t) JNI_ERR);
4178 return JNI_ERR;
4179 }
4180
4181 JNIWrapper("AttachCurrentThread");
4182 jint ret = attach_current_thread(vm, penv, _args, false);
4183 HOTSPOT_JNI_ATTACHCURRENTTHREAD_RETURN(ret);
4184 return ret;
4185 }
4186
4187
4188 jint JNICALL jni_DetachCurrentThread(JavaVM *vm) {
4189 HOTSPOT_JNI_DETACHCURRENTTHREAD_ENTRY(vm);
4190 VM_Exit::block_if_vm_exited();
4191
4192 JNIWrapper("DetachCurrentThread");
4193
4194 // If the thread has already been detached the operation is a no-op
4195 if (Thread::current_or_null() == NULL) {
4196 HOTSPOT_JNI_DETACHCURRENTTHREAD_RETURN(JNI_OK);
4197 return JNI_OK;
4198 }
4199
4200 JavaThread* thread = JavaThread::current();
4201 if (thread->has_last_Java_frame()) {
4202 HOTSPOT_JNI_DETACHCURRENTTHREAD_RETURN((uint32_t) JNI_ERR);
4203 // Can't detach a thread that's running java, that can't work.
4204 return JNI_ERR;
4205 }
4206
4207 // Safepoint support. Have to do call-back to safepoint code, if in the
4208 // middel of a safepoint operation
4209 ThreadStateTransition::transition_from_native(thread, _thread_in_vm);
4210
4211 // XXX: Note that JavaThread::exit() call below removes the guards on the
4212 // stack pages set up via enable_stack_{red,yellow}_zone() calls
4213 // above in jni_AttachCurrentThread. Unfortunately, while the setting
4214 // of the guards is visible in jni_AttachCurrentThread above,
4215 // the removal of the guards is buried below in JavaThread::exit()
4216 // here. The abstraction should be more symmetrically either exposed
4217 // or hidden (e.g. it could probably be hidden in the same
4218 // (platform-dependent) methods where we do alternate stack
4219 // maintenance work?)
4220 thread->exit(false, JavaThread::jni_detach);
4221 delete thread;
4222
4223 HOTSPOT_JNI_DETACHCURRENTTHREAD_RETURN(JNI_OK);
4224 return JNI_OK;
4225 }
4226
4227 DT_RETURN_MARK_DECL(GetEnv, jint
4228 , HOTSPOT_JNI_GETENV_RETURN(_ret_ref));
4229
4230 jint JNICALL jni_GetEnv(JavaVM *vm, void **penv, jint version) {
4231 HOTSPOT_JNI_GETENV_ENTRY(vm, penv, version);
4232 jint ret = JNI_ERR;
4233 DT_RETURN_MARK(GetEnv, jint, (const jint&)ret);
4234
4235 if (!vm_created) {
4236 *penv = NULL;
4237 ret = JNI_EDETACHED;
4238 return ret;
4239 }
4240
4241 if (JniExportedInterface::GetExportedInterface(vm, penv, version, &ret)) {
4242 return ret;
4243 }
4244
4245 #ifndef JVMPI_VERSION_1
4246 // need these in order to be polite about older agents
4247 #define JVMPI_VERSION_1 ((jint)0x10000001)
4248 #define JVMPI_VERSION_1_1 ((jint)0x10000002)
4249 #define JVMPI_VERSION_1_2 ((jint)0x10000003)
4250 #endif // !JVMPI_VERSION_1
4251
4252 Thread* thread = Thread::current_or_null();
4253 if (thread != NULL && thread->is_Java_thread()) {
4254 if (Threads::is_supported_jni_version_including_1_1(version)) {
4255 *(JNIEnv**)penv = ((JavaThread*) thread)->jni_environment();
4256 ret = JNI_OK;
4257 return ret;
4258
4259 } else if (version == JVMPI_VERSION_1 ||
4260 version == JVMPI_VERSION_1_1 ||
4261 version == JVMPI_VERSION_1_2) {
4262 tty->print_cr("ERROR: JVMPI, an experimental interface, is no longer supported.");
4263 tty->print_cr("Please use the supported interface: the JVM Tool Interface (JVM TI).");
4264 ret = JNI_EVERSION;
4265 return ret;
4266 } else if (JvmtiExport::is_jvmdi_version(version)) {
4267 tty->print_cr("FATAL ERROR: JVMDI is no longer supported.");
4268 tty->print_cr("Please use the supported interface: the JVM Tool Interface (JVM TI).");
4269 ret = JNI_EVERSION;
4270 return ret;
4271 } else {
4272 *penv = NULL;
4273 ret = JNI_EVERSION;
4274 return ret;
4275 }
4276 } else {
4277 *penv = NULL;
4278 ret = JNI_EDETACHED;
4279 return ret;
4280 }
4281 }
4282
4283
4284 jint JNICALL jni_AttachCurrentThreadAsDaemon(JavaVM *vm, void **penv, void *_args) {
4285 HOTSPOT_JNI_ATTACHCURRENTTHREADASDAEMON_ENTRY(vm, penv, _args);
4286 if (!vm_created) {
4287 HOTSPOT_JNI_ATTACHCURRENTTHREADASDAEMON_RETURN((uint32_t) JNI_ERR);
4288 return JNI_ERR;
4289 }
4290
4291 JNIWrapper("AttachCurrentThreadAsDaemon");
4292 jint ret = attach_current_thread(vm, penv, _args, true);
4293 HOTSPOT_JNI_ATTACHCURRENTTHREADASDAEMON_RETURN(ret);
4294 return ret;
4295 }
4296
4297
4298 } // End extern "C"
4299
4300 const struct JNIInvokeInterface_ jni_InvokeInterface = {
4301 NULL,
4302 NULL,
4303 NULL,
4304
4305 jni_DestroyJavaVM,
4306 jni_AttachCurrentThread,
4307 jni_DetachCurrentThread,
4308 jni_GetEnv,
4309 jni_AttachCurrentThreadAsDaemon
4310 };