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/universe.inline.hpp"
41 #include "oops/instanceKlass.hpp"
42 #include "oops/instanceOop.hpp"
43 #include "oops/markOop.hpp"
44 #include "oops/method.hpp"
45 #include "oops/objArrayKlass.hpp"
46 #include "oops/objArrayOop.inline.hpp"
47 #include "oops/oop.inline.hpp"
48 #include "oops/symbol.hpp"
49 #include "oops/typeArrayKlass.hpp"
50 #include "oops/typeArrayOop.hpp"
51 #include "prims/jni.h"
52 #include "prims/jniCheck.hpp"
53 #include "prims/jniExport.hpp"
54 #include "prims/jniFastGetField.hpp"
55 #include "prims/jvm.h"
56 #include "prims/jvm_misc.hpp"
57 #include "prims/jvmtiExport.hpp"
58 #include "prims/jvmtiThreadState.hpp"
59 #include "runtime/atomic.inline.hpp"
60 #include "runtime/compilationPolicy.hpp"
61 #include "runtime/fieldDescriptor.hpp"
62 #include "runtime/fprofiler.hpp"
63 #include "runtime/handles.inline.hpp"
64 #include "runtime/interfaceSupport.hpp"
65 #include "runtime/java.hpp"
66 #include "runtime/javaCalls.hpp"
67 #include "runtime/jfieldIDWorkaround.hpp"
68 #include "runtime/orderAccess.inline.hpp"
69 #include "runtime/reflection.hpp"
70 #include "runtime/sharedRuntime.hpp"
71 #include "runtime/signature.hpp"
72 #include "runtime/thread.inline.hpp"
73 #include "runtime/vm_operations.hpp"
74 #include "services/memTracker.hpp"
75 #include "services/runtimeService.hpp"
76 #include "trace/tracing.hpp"
77 #include "utilities/defaultStream.hpp"
78 #include "utilities/dtrace.hpp"
79 #include "utilities/events.hpp"
80 #include "utilities/histogram.hpp"
81 #include "utilities/internalVMTests.hpp"
82 #include "utilities/macros.hpp"
83 #if INCLUDE_ALL_GCS
84 #include "gc/g1/g1SATBCardTableModRefBS.hpp"
85 #endif // INCLUDE_ALL_GCS
86 #if INCLUDE_JVMCI
87 #include "jvmci/jvmciCompiler.hpp"
88 #include "jvmci/jvmciRuntime.hpp"
89 #endif
90
91 static jint CurrentVersion = JNI_VERSION_1_8;
92
93 #ifdef _WIN32
94 extern LONG WINAPI topLevelExceptionFilter(_EXCEPTION_POINTERS* );
95 #endif
96
97 // The DT_RETURN_MARK macros create a scoped object to fire the dtrace
98 // '-return' probe regardless of the return path is taken out of the function.
99 // Methods that have multiple return paths use this to avoid having to
100 // instrument each return path. Methods that use CHECK or THROW must use this
101 // since those macros can cause an immedate uninstrumented return.
102 //
103 // In order to get the return value, a reference to the variable containing
104 // the return value must be passed to the contructor of the object, and
105 // the return value must be set before return (since the mark object has
106 // a reference to it).
107 //
108 // Example:
109 // DT_RETURN_MARK_DECL(SomeFunc, int);
110 // JNI_ENTRY(int, SomeFunc, ...)
111 // int return_value = 0;
112 // DT_RETURN_MARK(SomeFunc, int, (const int&)return_value);
113 // foo(CHECK_0)
114 // return_value = 5;
115 // return return_value;
116 // JNI_END
117 #define DT_RETURN_MARK_DECL(name, type, probe) \
118 DTRACE_ONLY( \
119 class DTraceReturnProbeMark_##name { \
120 public: \
121 const type& _ret_ref; \
122 DTraceReturnProbeMark_##name(const type& v) : _ret_ref(v) {} \
123 ~DTraceReturnProbeMark_##name() { \
124 probe; \
125 } \
126 } \
127 )
128 // Void functions are simpler since there's no return value
129 #define DT_VOID_RETURN_MARK_DECL(name, probe) \
130 DTRACE_ONLY( \
131 class DTraceReturnProbeMark_##name { \
132 public: \
133 ~DTraceReturnProbeMark_##name() { \
134 probe; \
135 } \
136 } \
137 )
138
139 // Place these macros in the function to mark the return. Non-void
140 // functions need the type and address of the return value.
141 #define DT_RETURN_MARK(name, type, ref) \
142 DTRACE_ONLY( DTraceReturnProbeMark_##name dtrace_return_mark(ref) )
143 #define DT_VOID_RETURN_MARK(name) \
144 DTRACE_ONLY( DTraceReturnProbeMark_##name dtrace_return_mark )
145
146
147 // Use these to select distinct code for floating-point vs. non-floating point
148 // situations. Used from within common macros where we need slightly
149 // different behavior for Float/Double
150 #define FP_SELECT_Boolean(intcode, fpcode) intcode
151 #define FP_SELECT_Byte(intcode, fpcode) intcode
152 #define FP_SELECT_Char(intcode, fpcode) intcode
153 #define FP_SELECT_Short(intcode, fpcode) intcode
154 #define FP_SELECT_Object(intcode, fpcode) intcode
155 #define FP_SELECT_Int(intcode, fpcode) intcode
156 #define FP_SELECT_Long(intcode, fpcode) intcode
157 #define FP_SELECT_Float(intcode, fpcode) fpcode
158 #define FP_SELECT_Double(intcode, fpcode) fpcode
159 #define FP_SELECT(TypeName, intcode, fpcode) \
160 FP_SELECT_##TypeName(intcode, fpcode)
161
162 #define COMMA ,
163
164 // Choose DT_RETURN_MARK macros based on the type: float/double -> void
165 // (dtrace doesn't do FP yet)
166 #define DT_RETURN_MARK_DECL_FOR(TypeName, name, type, probe) \
167 FP_SELECT(TypeName, \
168 DT_RETURN_MARK_DECL(name, type, probe), DT_VOID_RETURN_MARK_DECL(name, probe) )
169 #define DT_RETURN_MARK_FOR(TypeName, name, type, ref) \
170 FP_SELECT(TypeName, \
171 DT_RETURN_MARK(name, type, ref), DT_VOID_RETURN_MARK(name) )
172
173
174 // out-of-line helpers for class jfieldIDWorkaround:
175
176 bool jfieldIDWorkaround::is_valid_jfieldID(Klass* k, jfieldID id) {
177 if (jfieldIDWorkaround::is_instance_jfieldID(k, id)) {
178 uintptr_t as_uint = (uintptr_t) id;
179 intptr_t offset = raw_instance_offset(id);
180 if (is_checked_jfieldID(id)) {
181 if (!klass_hash_ok(k, id)) {
182 return false;
183 }
184 }
185 return InstanceKlass::cast(k)->contains_field_offset(offset);
186 } else {
187 JNIid* result = (JNIid*) id;
188 #ifdef ASSERT
189 return result != NULL && result->is_static_field_id();
190 #else
191 return result != NULL;
192 #endif
193 }
194 }
195
196
197 intptr_t jfieldIDWorkaround::encode_klass_hash(Klass* k, intptr_t offset) {
198 if (offset <= small_offset_mask) {
199 Klass* field_klass = k;
200 Klass* super_klass = field_klass->super();
201 // With compressed oops the most super class with nonstatic fields would
202 // be the owner of fields embedded in the header.
203 while (InstanceKlass::cast(super_klass)->has_nonstatic_fields() &&
204 InstanceKlass::cast(super_klass)->contains_field_offset(offset)) {
205 field_klass = super_klass; // super contains the field also
206 super_klass = field_klass->super();
207 }
208 debug_only(NoSafepointVerifier nosafepoint;)
209 uintptr_t klass_hash = field_klass->identity_hash();
210 return ((klass_hash & klass_mask) << klass_shift) | checked_mask_in_place;
211 } else {
212 #if 0
213 #ifndef PRODUCT
214 {
215 ResourceMark rm;
216 warning("VerifyJNIFields: long offset %d in %s", offset, k->external_name());
217 }
218 #endif
219 #endif
220 return 0;
221 }
222 }
223
224 bool jfieldIDWorkaround::klass_hash_ok(Klass* k, jfieldID id) {
225 uintptr_t as_uint = (uintptr_t) id;
226 intptr_t klass_hash = (as_uint >> klass_shift) & klass_mask;
227 do {
228 debug_only(NoSafepointVerifier nosafepoint;)
229 // Could use a non-blocking query for identity_hash here...
230 if ((k->identity_hash() & klass_mask) == klass_hash)
231 return true;
232 k = k->super();
233 } while (k != NULL);
234 return false;
235 }
236
237 void jfieldIDWorkaround::verify_instance_jfieldID(Klass* k, jfieldID id) {
238 guarantee(jfieldIDWorkaround::is_instance_jfieldID(k, id), "must be an instance field" );
239 uintptr_t as_uint = (uintptr_t) id;
240 intptr_t offset = raw_instance_offset(id);
241 if (VerifyJNIFields) {
242 if (is_checked_jfieldID(id)) {
243 guarantee(klass_hash_ok(k, id),
244 "Bug in native code: jfieldID class must match object");
245 } else {
246 #if 0
247 #ifndef PRODUCT
248 if (Verbose) {
249 ResourceMark rm;
250 warning("VerifyJNIFields: unverified offset %d for %s", offset, k->external_name());
251 }
252 #endif
253 #endif
254 }
255 }
256 guarantee(InstanceKlass::cast(k)->contains_field_offset(offset),
257 "Bug in native code: jfieldID offset must address interior of object");
258 }
259
260 // Wrapper to trace JNI functions
261
262 #ifdef ASSERT
263 Histogram* JNIHistogram;
264 static volatile jint JNIHistogram_lock = 0;
265
266 class JNIHistogramElement : public HistogramElement {
267 public:
268 JNIHistogramElement(const char* name);
269 };
270
271 JNIHistogramElement::JNIHistogramElement(const char* elementName) {
272 _name = elementName;
273 uintx count = 0;
274
275 while (Atomic::cmpxchg(1, &JNIHistogram_lock, 0) != 0) {
276 while (OrderAccess::load_acquire(&JNIHistogram_lock) != 0) {
277 count +=1;
278 if ( (WarnOnStalledSpinLock > 0)
279 && (count % WarnOnStalledSpinLock == 0)) {
280 warning("JNIHistogram_lock seems to be stalled");
281 }
282 }
283 }
284
285
286 if(JNIHistogram == NULL)
287 JNIHistogram = new Histogram("JNI Call Counts",100);
288
289 JNIHistogram->add_element(this);
290 Atomic::dec(&JNIHistogram_lock);
291 }
292
293 #define JNICountWrapper(arg) \
294 static JNIHistogramElement* e = new JNIHistogramElement(arg); \
295 /* There is a MT-race condition in VC++. So we need to make sure that that e has been initialized */ \
296 if (e != NULL) e->increment_count()
297 #define JNIWrapper(arg) JNICountWrapper(arg);
298 #else
299 #define JNIWrapper(arg)
300 #endif
301
302
303 // Implementation of JNI entries
304
305 DT_RETURN_MARK_DECL(DefineClass, jclass
306 , HOTSPOT_JNI_DEFINECLASS_RETURN(_ret_ref));
307
308 JNI_ENTRY(jclass, jni_DefineClass(JNIEnv *env, const char *name, jobject loaderRef,
309 const jbyte *buf, jsize bufLen))
310 JNIWrapper("DefineClass");
311
312 HOTSPOT_JNI_DEFINECLASS_ENTRY(
313 env, (char*) name, loaderRef, (char*) buf, bufLen);
314
315 jclass cls = NULL;
316 DT_RETURN_MARK(DefineClass, jclass, (const jclass&)cls);
317
318 TempNewSymbol class_name = NULL;
319 // Since exceptions can be thrown, class initialization can take place
320 // if name is NULL no check for class name in .class stream has to be made.
321 if (name != NULL) {
322 const int str_len = (int)strlen(name);
323 if (str_len > Symbol::max_length()) {
324 // It's impossible to create this class; the name cannot fit
325 // into the constant pool.
326 THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), name);
327 }
328 class_name = SymbolTable::new_symbol(name, CHECK_NULL);
329 }
330 ResourceMark rm(THREAD);
331 ClassFileStream st((u1*)buf, bufLen, NULL, ClassFileStream::verify);
332 Handle class_loader (THREAD, JNIHandles::resolve(loaderRef));
333
334 if (UsePerfData && !class_loader.is_null()) {
335 // check whether the current caller thread holds the lock or not.
336 // If not, increment the corresponding counter
337 if (ObjectSynchronizer::
338 query_lock_ownership((JavaThread*)THREAD, class_loader) !=
339 ObjectSynchronizer::owner_self) {
340 ClassLoader::sync_JNIDefineClassLockFreeCounter()->inc();
341 }
342 }
343 Klass* k = SystemDictionary::resolve_from_stream(class_name,
344 class_loader,
345 Handle(),
346 &st,
347 CHECK_NULL);
348
349 if (log_is_enabled(Info, classresolve) && k != NULL) {
350 trace_class_resolution(k);
351 }
352
353 cls = (jclass)JNIHandles::make_local(
354 env, k->java_mirror());
355 return cls;
356 JNI_END
357
358
359
360 static bool first_time_FindClass = true;
361
362 DT_RETURN_MARK_DECL(FindClass, jclass
363 , HOTSPOT_JNI_FINDCLASS_RETURN(_ret_ref));
364
365 JNI_ENTRY(jclass, jni_FindClass(JNIEnv *env, const char *name))
366 JNIWrapper("FindClass");
367
368 HOTSPOT_JNI_FINDCLASS_ENTRY(env, (char *)name);
369
370 jclass result = NULL;
371 DT_RETURN_MARK(FindClass, jclass, (const jclass&)result);
372
373 // Remember if we are the first invocation of jni_FindClass
374 bool first_time = first_time_FindClass;
375 first_time_FindClass = false;
376
377 // Sanity check the name: it cannot be null or larger than the maximum size
378 // name we can fit in the constant pool.
379 if (name == NULL || (int)strlen(name) > Symbol::max_length()) {
380 THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), name);
381 }
382
383 //%note jni_3
384 Handle loader;
385 Handle protection_domain;
386 // Find calling class
387 instanceKlassHandle k (THREAD, thread->security_get_caller_class(0));
388 if (k.not_null()) {
389 loader = Handle(THREAD, k->class_loader());
390 // Special handling to make sure JNI_OnLoad and JNI_OnUnload are executed
391 // in the correct class context.
392 if (loader.is_null() &&
393 k->name() == vmSymbols::java_lang_ClassLoader_NativeLibrary()) {
394 JavaValue result(T_OBJECT);
395 JavaCalls::call_static(&result, k,
396 vmSymbols::getFromClass_name(),
397 vmSymbols::void_class_signature(),
398 thread);
399 if (HAS_PENDING_EXCEPTION) {
400 Handle ex(thread, thread->pending_exception());
401 CLEAR_PENDING_EXCEPTION;
402 THROW_HANDLE_0(ex);
403 }
404 oop mirror = (oop) result.get_jobject();
405 loader = Handle(THREAD,
406 InstanceKlass::cast(java_lang_Class::as_Klass(mirror))->class_loader());
407 protection_domain = Handle(THREAD,
408 InstanceKlass::cast(java_lang_Class::as_Klass(mirror))->protection_domain());
409 }
410 } else {
411 // We call ClassLoader.getSystemClassLoader to obtain the system class loader.
412 loader = Handle(THREAD, SystemDictionary::java_system_loader());
413 }
414
415 TempNewSymbol sym = SymbolTable::new_symbol(name, CHECK_NULL);
416 result = find_class_from_class_loader(env, sym, true, loader,
417 protection_domain, true, thread);
418
419 if (log_is_enabled(Info, classresolve) && result != NULL) {
420 trace_class_resolution(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(result)));
421 }
422
423 // If we were the first invocation of jni_FindClass, we enable compilation again
424 // rather than just allowing invocation counter to overflow and decay.
425 // Controlled by flag DelayCompilationDuringStartup.
426 if (first_time && !CompileTheWorld)
427 CompilationPolicy::completed_vm_startup();
428
429 return result;
430 JNI_END
431
432 DT_RETURN_MARK_DECL(FromReflectedMethod, jmethodID
433 , HOTSPOT_JNI_FROMREFLECTEDMETHOD_RETURN((uintptr_t)_ret_ref));
434
435 JNI_ENTRY(jmethodID, jni_FromReflectedMethod(JNIEnv *env, jobject method))
436 JNIWrapper("FromReflectedMethod");
437
438 HOTSPOT_JNI_FROMREFLECTEDMETHOD_ENTRY(env, method);
439
440 jmethodID ret = NULL;
441 DT_RETURN_MARK(FromReflectedMethod, jmethodID, (const jmethodID&)ret);
442
443 // method is a handle to a java.lang.reflect.Method object
444 oop reflected = JNIHandles::resolve_non_null(method);
445 oop mirror = NULL;
446 int slot = 0;
447
448 if (reflected->klass() == SystemDictionary::reflect_Constructor_klass()) {
449 mirror = java_lang_reflect_Constructor::clazz(reflected);
450 slot = java_lang_reflect_Constructor::slot(reflected);
451 } else {
452 assert(reflected->klass() == SystemDictionary::reflect_Method_klass(), "wrong type");
453 mirror = java_lang_reflect_Method::clazz(reflected);
454 slot = java_lang_reflect_Method::slot(reflected);
455 }
456 Klass* k = java_lang_Class::as_Klass(mirror);
457
458 KlassHandle k1(THREAD, k);
459 // Make sure class is initialized before handing id's out to methods
460 k1()->initialize(CHECK_NULL);
461 Method* m = InstanceKlass::cast(k1())->method_with_idnum(slot);
462 ret = m==NULL? NULL : m->jmethod_id(); // return NULL if reflected method deleted
463 return ret;
464 JNI_END
465
466 DT_RETURN_MARK_DECL(FromReflectedField, jfieldID
467 , HOTSPOT_JNI_FROMREFLECTEDFIELD_RETURN((uintptr_t)_ret_ref));
468
469 JNI_ENTRY(jfieldID, jni_FromReflectedField(JNIEnv *env, jobject field))
470 JNIWrapper("FromReflectedField");
471
472 HOTSPOT_JNI_FROMREFLECTEDFIELD_ENTRY(env, field);
473
474 jfieldID ret = NULL;
475 DT_RETURN_MARK(FromReflectedField, jfieldID, (const jfieldID&)ret);
476
477 // field is a handle to a java.lang.reflect.Field object
478 oop reflected = JNIHandles::resolve_non_null(field);
479 oop mirror = java_lang_reflect_Field::clazz(reflected);
480 Klass* k = java_lang_Class::as_Klass(mirror);
481 int slot = java_lang_reflect_Field::slot(reflected);
482 int modifiers = java_lang_reflect_Field::modifiers(reflected);
483
484 KlassHandle k1(THREAD, k);
485 // Make sure class is initialized before handing id's out to fields
486 k1()->initialize(CHECK_NULL);
487
488 // First check if this is a static field
489 if (modifiers & JVM_ACC_STATIC) {
490 intptr_t offset = InstanceKlass::cast(k1())->field_offset( slot );
491 JNIid* id = InstanceKlass::cast(k1())->jni_id_for(offset);
492 assert(id != NULL, "corrupt Field object");
493 debug_only(id->set_is_static_field_id();)
494 // A jfieldID for a static field is a JNIid specifying the field holder and the offset within the Klass*
495 ret = jfieldIDWorkaround::to_static_jfieldID(id);
496 return ret;
497 }
498
499 // The slot is the index of the field description in the field-array
500 // The jfieldID is the offset of the field within the object
501 // It may also have hash bits for k, if VerifyJNIFields is turned on.
502 intptr_t offset = InstanceKlass::cast(k1())->field_offset( slot );
503 assert(InstanceKlass::cast(k1())->contains_field_offset(offset), "stay within object");
504 ret = jfieldIDWorkaround::to_instance_jfieldID(k1(), offset);
505 return ret;
506 JNI_END
507
508
509 DT_RETURN_MARK_DECL(ToReflectedMethod, jobject
510 , HOTSPOT_JNI_TOREFLECTEDMETHOD_RETURN(_ret_ref));
511
512 JNI_ENTRY(jobject, jni_ToReflectedMethod(JNIEnv *env, jclass cls, jmethodID method_id, jboolean isStatic))
513 JNIWrapper("ToReflectedMethod");
514
515 HOTSPOT_JNI_TOREFLECTEDMETHOD_ENTRY(env, cls, (uintptr_t) method_id, isStatic);
516
517 jobject ret = NULL;
518 DT_RETURN_MARK(ToReflectedMethod, jobject, (const jobject&)ret);
519
520 methodHandle m (THREAD, Method::resolve_jmethod_id(method_id));
521 assert(m->is_static() == (isStatic != 0), "jni_ToReflectedMethod access flags doesn't match");
522 oop reflection_method;
523 if (m->is_initializer()) {
524 reflection_method = Reflection::new_constructor(m, CHECK_NULL);
525 } else {
526 reflection_method = Reflection::new_method(m, false, CHECK_NULL);
527 }
528 ret = JNIHandles::make_local(env, reflection_method);
529 return ret;
530 JNI_END
531
532 DT_RETURN_MARK_DECL(GetSuperclass, jclass
533 , HOTSPOT_JNI_GETSUPERCLASS_RETURN(_ret_ref));
534
535 JNI_ENTRY(jclass, jni_GetSuperclass(JNIEnv *env, jclass sub))
536 JNIWrapper("GetSuperclass");
537
538 HOTSPOT_JNI_GETSUPERCLASS_ENTRY(env, sub);
539
540 jclass obj = NULL;
541 DT_RETURN_MARK(GetSuperclass, jclass, (const jclass&)obj);
542
543 oop mirror = JNIHandles::resolve_non_null(sub);
544 // primitive classes return NULL
545 if (java_lang_Class::is_primitive(mirror)) return NULL;
546
547 // Rules of Class.getSuperClass as implemented by KLass::java_super:
548 // arrays return Object
549 // interfaces return NULL
550 // proper classes return Klass::super()
551 Klass* k = java_lang_Class::as_Klass(mirror);
552 if (k->is_interface()) return NULL;
553
554 // return mirror for superclass
555 Klass* super = k->java_super();
556 // super2 is the value computed by the compiler's getSuperClass intrinsic:
557 debug_only(Klass* super2 = ( k->is_array_klass()
558 ? SystemDictionary::Object_klass()
559 : k->super() ) );
560 assert(super == super2,
561 "java_super computation depends on interface, array, other super");
562 obj = (super == NULL) ? NULL : (jclass) JNIHandles::make_local(super->java_mirror());
563 return obj;
564 JNI_END
565
566 JNI_QUICK_ENTRY(jboolean, jni_IsAssignableFrom(JNIEnv *env, jclass sub, jclass super))
567 JNIWrapper("IsSubclassOf");
568
569 HOTSPOT_JNI_ISASSIGNABLEFROM_ENTRY(env, sub, super);
570
571 oop sub_mirror = JNIHandles::resolve_non_null(sub);
572 oop super_mirror = JNIHandles::resolve_non_null(super);
573 if (java_lang_Class::is_primitive(sub_mirror) ||
574 java_lang_Class::is_primitive(super_mirror)) {
575 jboolean ret = (sub_mirror == super_mirror);
576
577 HOTSPOT_JNI_ISASSIGNABLEFROM_RETURN(ret);
578 return ret;
579 }
580 Klass* sub_klass = java_lang_Class::as_Klass(sub_mirror);
581 Klass* super_klass = java_lang_Class::as_Klass(super_mirror);
582 assert(sub_klass != NULL && super_klass != NULL, "invalid arguments to jni_IsAssignableFrom");
583 jboolean ret = sub_klass->is_subtype_of(super_klass) ?
584 JNI_TRUE : JNI_FALSE;
585
586 HOTSPOT_JNI_ISASSIGNABLEFROM_RETURN(ret);
587 return ret;
588 JNI_END
589
590
591 DT_RETURN_MARK_DECL(Throw, jint
592 , HOTSPOT_JNI_THROW_RETURN(_ret_ref));
593
594 JNI_ENTRY(jint, jni_Throw(JNIEnv *env, jthrowable obj))
595 JNIWrapper("Throw");
596
597 HOTSPOT_JNI_THROW_ENTRY(env, obj);
598
599 jint ret = JNI_OK;
600 DT_RETURN_MARK(Throw, jint, (const jint&)ret);
601
602 THROW_OOP_(JNIHandles::resolve(obj), JNI_OK);
603 ShouldNotReachHere();
604 return 0; // Mute compiler.
605 JNI_END
606
607
608 DT_RETURN_MARK_DECL(ThrowNew, jint
609 , HOTSPOT_JNI_THROWNEW_RETURN(_ret_ref));
610
611 JNI_ENTRY(jint, jni_ThrowNew(JNIEnv *env, jclass clazz, const char *message))
612 JNIWrapper("ThrowNew");
613
614 HOTSPOT_JNI_THROWNEW_ENTRY(env, clazz, (char *) message);
615
616 jint ret = JNI_OK;
617 DT_RETURN_MARK(ThrowNew, jint, (const jint&)ret);
618
619 InstanceKlass* k = InstanceKlass::cast(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz)));
620 Symbol* name = k->name();
621 Handle class_loader (THREAD, k->class_loader());
622 Handle protection_domain (THREAD, k->protection_domain());
623 THROW_MSG_LOADER_(name, (char *)message, class_loader, protection_domain, JNI_OK);
624 ShouldNotReachHere();
625 return 0; // Mute compiler.
626 JNI_END
627
628
629 // JNI functions only transform a pending async exception to a synchronous
630 // exception in ExceptionOccurred and ExceptionCheck calls, since
631 // delivering an async exception in other places won't change the native
632 // code's control flow and would be harmful when native code further calls
633 // JNI functions with a pending exception. Async exception is also checked
634 // during the call, so ExceptionOccurred/ExceptionCheck won't return
635 // false but deliver the async exception at the very end during
636 // state transition.
637
638 static void jni_check_async_exceptions(JavaThread *thread) {
639 assert(thread == Thread::current(), "must be itself");
640 thread->check_and_handle_async_exceptions();
641 }
642
643 JNI_ENTRY_NO_PRESERVE(jthrowable, jni_ExceptionOccurred(JNIEnv *env))
644 JNIWrapper("ExceptionOccurred");
645
646 HOTSPOT_JNI_EXCEPTIONOCCURRED_ENTRY(env);
647
648 jni_check_async_exceptions(thread);
649 oop exception = thread->pending_exception();
650 jthrowable ret = (jthrowable) JNIHandles::make_local(env, exception);
651
652 HOTSPOT_JNI_EXCEPTIONOCCURRED_RETURN(ret);
653 return ret;
654 JNI_END
655
656
657 JNI_ENTRY_NO_PRESERVE(void, jni_ExceptionDescribe(JNIEnv *env))
658 JNIWrapper("ExceptionDescribe");
659
660 HOTSPOT_JNI_EXCEPTIONDESCRIBE_ENTRY(env);
661
662 if (thread->has_pending_exception()) {
663 Handle ex(thread, thread->pending_exception());
664 thread->clear_pending_exception();
665 if (ex->is_a(SystemDictionary::ThreadDeath_klass())) {
666 // Don't print anything if we are being killed.
667 } else {
668 jio_fprintf(defaultStream::error_stream(), "Exception ");
669 if (thread != NULL && thread->threadObj() != NULL) {
670 ResourceMark rm(THREAD);
671 jio_fprintf(defaultStream::error_stream(),
672 "in thread \"%s\" ", thread->get_thread_name());
673 }
674 if (ex->is_a(SystemDictionary::Throwable_klass())) {
675 JavaValue result(T_VOID);
676 JavaCalls::call_virtual(&result,
677 ex,
678 KlassHandle(THREAD,
679 SystemDictionary::Throwable_klass()),
680 vmSymbols::printStackTrace_name(),
681 vmSymbols::void_method_signature(),
682 THREAD);
683 // If an exception is thrown in the call it gets thrown away. Not much
684 // we can do with it. The native code that calls this, does not check
685 // for the exception - hence, it might still be in the thread when DestroyVM gets
686 // called, potentially causing a few asserts to trigger - since no pending exception
687 // is expected.
688 CLEAR_PENDING_EXCEPTION;
689 } else {
690 ResourceMark rm(THREAD);
691 jio_fprintf(defaultStream::error_stream(),
692 ". Uncaught exception of type %s.",
693 ex->klass()->external_name());
694 }
695 }
696 }
697
698 HOTSPOT_JNI_EXCEPTIONDESCRIBE_RETURN();
699 JNI_END
700
701
702 JNI_QUICK_ENTRY(void, jni_ExceptionClear(JNIEnv *env))
703 JNIWrapper("ExceptionClear");
704
705 HOTSPOT_JNI_EXCEPTIONCLEAR_ENTRY(env);
706
707 // The jni code might be using this API to clear java thrown exception.
708 // So just mark jvmti thread exception state as exception caught.
709 JvmtiThreadState *state = JavaThread::current()->jvmti_thread_state();
710 if (state != NULL && state->is_exception_detected()) {
711 state->set_exception_caught();
712 }
713 thread->clear_pending_exception();
714
715 HOTSPOT_JNI_EXCEPTIONCLEAR_RETURN();
716 JNI_END
717
718
719 JNI_ENTRY(void, jni_FatalError(JNIEnv *env, const char *msg))
720 JNIWrapper("FatalError");
721
722 HOTSPOT_JNI_FATALERROR_ENTRY(env, (char *) msg);
723
724 tty->print_cr("FATAL ERROR in native method: %s", msg);
725 thread->print_stack();
726 os::abort(); // Dump core and abort
727 JNI_END
728
729
730 JNI_ENTRY(jint, jni_PushLocalFrame(JNIEnv *env, jint capacity))
731 JNIWrapper("PushLocalFrame");
732
733 HOTSPOT_JNI_PUSHLOCALFRAME_ENTRY(env, capacity);
734
735 //%note jni_11
736 if (capacity < 0 ||
737 ((MaxJNILocalCapacity > 0) && (capacity > MaxJNILocalCapacity))) {
738 HOTSPOT_JNI_PUSHLOCALFRAME_RETURN((uint32_t)JNI_ERR);
739 return JNI_ERR;
740 }
741 JNIHandleBlock* old_handles = thread->active_handles();
742 JNIHandleBlock* new_handles = JNIHandleBlock::allocate_block(thread);
743 assert(new_handles != NULL, "should not be NULL");
744 new_handles->set_pop_frame_link(old_handles);
745 thread->set_active_handles(new_handles);
746 jint ret = JNI_OK;
747 HOTSPOT_JNI_PUSHLOCALFRAME_RETURN(ret);
748 return ret;
749 JNI_END
750
751
752 JNI_ENTRY(jobject, jni_PopLocalFrame(JNIEnv *env, jobject result))
753 JNIWrapper("PopLocalFrame");
754
755 HOTSPOT_JNI_POPLOCALFRAME_ENTRY(env, result);
756
757 //%note jni_11
758 Handle result_handle(thread, JNIHandles::resolve(result));
759 JNIHandleBlock* old_handles = thread->active_handles();
760 JNIHandleBlock* new_handles = old_handles->pop_frame_link();
761 if (new_handles != NULL) {
762 // As a sanity check we only release the handle blocks if the pop_frame_link is not NULL.
763 // This way code will still work if PopLocalFrame is called without a corresponding
764 // PushLocalFrame call. Note that we set the pop_frame_link to NULL explicitly, otherwise
765 // the release_block call will release the blocks.
766 thread->set_active_handles(new_handles);
767 old_handles->set_pop_frame_link(NULL); // clear link we won't release new_handles below
768 JNIHandleBlock::release_block(old_handles, thread); // may block
769 result = JNIHandles::make_local(thread, result_handle());
770 }
771 HOTSPOT_JNI_POPLOCALFRAME_RETURN(result);
772 return result;
773 JNI_END
774
775
776 JNI_ENTRY(jobject, jni_NewGlobalRef(JNIEnv *env, jobject ref))
777 JNIWrapper("NewGlobalRef");
778
779 HOTSPOT_JNI_NEWGLOBALREF_ENTRY(env, ref);
780
781 Handle ref_handle(thread, JNIHandles::resolve(ref));
782 jobject ret = JNIHandles::make_global(ref_handle);
783
784 HOTSPOT_JNI_NEWGLOBALREF_RETURN(ret);
785 return ret;
786 JNI_END
787
788 // Must be JNI_ENTRY (with HandleMark)
789 JNI_ENTRY_NO_PRESERVE(void, jni_DeleteGlobalRef(JNIEnv *env, jobject ref))
790 JNIWrapper("DeleteGlobalRef");
791
792 HOTSPOT_JNI_DELETEGLOBALREF_ENTRY(env, ref);
793
794 JNIHandles::destroy_global(ref);
795
796 HOTSPOT_JNI_DELETEGLOBALREF_RETURN();
797 JNI_END
798
799 JNI_QUICK_ENTRY(void, jni_DeleteLocalRef(JNIEnv *env, jobject obj))
800 JNIWrapper("DeleteLocalRef");
801
802 HOTSPOT_JNI_DELETELOCALREF_ENTRY(env, obj);
803
804 JNIHandles::destroy_local(obj);
805
806 HOTSPOT_JNI_DELETELOCALREF_RETURN();
807 JNI_END
808
809 JNI_QUICK_ENTRY(jboolean, jni_IsSameObject(JNIEnv *env, jobject r1, jobject r2))
810 JNIWrapper("IsSameObject");
811
812 HOTSPOT_JNI_ISSAMEOBJECT_ENTRY(env, r1, r2);
813
814 oop a = JNIHandles::resolve(r1);
815 oop b = JNIHandles::resolve(r2);
816 jboolean ret = (a == b) ? JNI_TRUE : JNI_FALSE;
817
818 HOTSPOT_JNI_ISSAMEOBJECT_RETURN(ret);
819 return ret;
820 JNI_END
821
822
823 JNI_ENTRY(jobject, jni_NewLocalRef(JNIEnv *env, jobject ref))
824 JNIWrapper("NewLocalRef");
825
826 HOTSPOT_JNI_NEWLOCALREF_ENTRY(env, ref);
827
828 jobject ret = JNIHandles::make_local(env, JNIHandles::resolve(ref));
829
830 HOTSPOT_JNI_NEWLOCALREF_RETURN(ret);
831 return ret;
832 JNI_END
833
834 JNI_LEAF(jint, jni_EnsureLocalCapacity(JNIEnv *env, jint capacity))
835 JNIWrapper("EnsureLocalCapacity");
836
837 HOTSPOT_JNI_ENSURELOCALCAPACITY_ENTRY(env, capacity);
838
839 jint ret;
840 if (capacity >= 0 &&
841 ((MaxJNILocalCapacity <= 0) || (capacity <= MaxJNILocalCapacity))) {
842 ret = JNI_OK;
843 } else {
844 ret = JNI_ERR;
845 }
846
847 HOTSPOT_JNI_ENSURELOCALCAPACITY_RETURN(ret);
848 return ret;
849 JNI_END
850
851 // Return the Handle Type
852 JNI_LEAF(jobjectRefType, jni_GetObjectRefType(JNIEnv *env, jobject obj))
853 JNIWrapper("GetObjectRefType");
854
855 HOTSPOT_JNI_GETOBJECTREFTYPE_ENTRY(env, obj);
856
857 jobjectRefType ret;
858 if (JNIHandles::is_local_handle(thread, obj) ||
859 JNIHandles::is_frame_handle(thread, obj))
860 ret = JNILocalRefType;
861 else if (JNIHandles::is_global_handle(obj))
862 ret = JNIGlobalRefType;
863 else if (JNIHandles::is_weak_global_handle(obj))
864 ret = JNIWeakGlobalRefType;
865 else
866 ret = JNIInvalidRefType;
867
868 HOTSPOT_JNI_GETOBJECTREFTYPE_RETURN((void *) ret);
869 return ret;
870 JNI_END
871
872
873 class JNI_ArgumentPusher : public SignatureIterator {
874 protected:
875 JavaCallArguments* _arguments;
876
877 virtual void get_bool () = 0;
878 virtual void get_char () = 0;
879 virtual void get_short () = 0;
880 virtual void get_byte () = 0;
881 virtual void get_int () = 0;
882 virtual void get_long () = 0;
883 virtual void get_float () = 0;
884 virtual void get_double () = 0;
885 virtual void get_object () = 0;
886
887 JNI_ArgumentPusher(Symbol* signature) : SignatureIterator(signature) {
888 this->_return_type = T_ILLEGAL;
889 _arguments = NULL;
890 }
891
892 public:
893 virtual void iterate( uint64_t fingerprint ) = 0;
894
895 void set_java_argument_object(JavaCallArguments *arguments) { _arguments = arguments; }
896
897 inline void do_bool() { if (!is_return_type()) get_bool(); }
898 inline void do_char() { if (!is_return_type()) get_char(); }
899 inline void do_short() { if (!is_return_type()) get_short(); }
900 inline void do_byte() { if (!is_return_type()) get_byte(); }
901 inline void do_int() { if (!is_return_type()) get_int(); }
902 inline void do_long() { if (!is_return_type()) get_long(); }
903 inline void do_float() { if (!is_return_type()) get_float(); }
904 inline void do_double() { if (!is_return_type()) get_double(); }
905 inline void do_object(int begin, int end) { if (!is_return_type()) get_object(); }
906 inline void do_array(int begin, int end) { if (!is_return_type()) get_object(); } // do_array uses get_object -- there is no get_array
907 inline void do_void() { }
908
909 JavaCallArguments* arguments() { return _arguments; }
910 void push_receiver(Handle h) { _arguments->push_oop(h); }
911 };
912
913
914 class JNI_ArgumentPusherVaArg : public JNI_ArgumentPusher {
915 protected:
916 va_list _ap;
917
918 inline void get_bool() { _arguments->push_int(va_arg(_ap, jint)); } // bool is coerced to int when using va_arg
919 inline void get_char() { _arguments->push_int(va_arg(_ap, jint)); } // char is coerced to int when using va_arg
920 inline void get_short() { _arguments->push_int(va_arg(_ap, jint)); } // short is coerced to int when using va_arg
921 inline void get_byte() { _arguments->push_int(va_arg(_ap, jint)); } // byte is coerced to int when using va_arg
922 inline void get_int() { _arguments->push_int(va_arg(_ap, jint)); }
923
924 // each of these paths is exercized by the various jck Call[Static,Nonvirtual,][Void,Int,..]Method[A,V,] tests
925
926 inline void get_long() { _arguments->push_long(va_arg(_ap, jlong)); }
927 inline void get_float() { _arguments->push_float((jfloat)va_arg(_ap, jdouble)); } // float is coerced to double w/ va_arg
928 inline void get_double() { _arguments->push_double(va_arg(_ap, jdouble)); }
929 inline void get_object() { jobject l = va_arg(_ap, jobject);
930 _arguments->push_oop(Handle((oop *)l, false)); }
931
932 inline void set_ap(va_list rap) {
933 #ifdef va_copy
934 va_copy(_ap, rap);
935 #elif defined (__va_copy)
936 __va_copy(_ap, rap);
937 #else
938 _ap = rap;
939 #endif
940 }
941
942 public:
943 JNI_ArgumentPusherVaArg(Symbol* signature, va_list rap)
944 : JNI_ArgumentPusher(signature) {
945 set_ap(rap);
946 }
947 JNI_ArgumentPusherVaArg(jmethodID method_id, va_list rap)
948 : JNI_ArgumentPusher(Method::resolve_jmethod_id(method_id)->signature()) {
949 set_ap(rap);
950 }
951
952 // Optimized path if we have the bitvector form of signature
953 void iterate( uint64_t fingerprint ) {
954 if (fingerprint == (uint64_t)CONST64(-1)) {
955 SignatureIterator::iterate(); // Must be too many arguments
956 } else {
957 _return_type = (BasicType)((fingerprint >> static_feature_size) &
958 result_feature_mask);
959
960 assert(fingerprint, "Fingerprint should not be 0");
961 fingerprint = fingerprint >> (static_feature_size + result_feature_size);
962 while ( 1 ) {
963 switch ( fingerprint & parameter_feature_mask ) {
964 case bool_parm:
965 case char_parm:
966 case short_parm:
967 case byte_parm:
968 case int_parm:
969 get_int();
970 break;
971 case obj_parm:
972 get_object();
973 break;
974 case long_parm:
975 get_long();
976 break;
977 case float_parm:
978 get_float();
979 break;
980 case double_parm:
981 get_double();
982 break;
983 case done_parm:
984 return;
985 break;
986 default:
987 ShouldNotReachHere();
988 break;
989 }
990 fingerprint >>= parameter_feature_size;
991 }
992 }
993 }
994 };
995
996
997 class JNI_ArgumentPusherArray : public JNI_ArgumentPusher {
998 protected:
999 const jvalue *_ap;
1000
1001 inline void get_bool() { _arguments->push_int((jint)(_ap++)->z); }
1002 inline void get_char() { _arguments->push_int((jint)(_ap++)->c); }
1003 inline void get_short() { _arguments->push_int((jint)(_ap++)->s); }
1004 inline void get_byte() { _arguments->push_int((jint)(_ap++)->b); }
1005 inline void get_int() { _arguments->push_int((jint)(_ap++)->i); }
1006
1007 inline void get_long() { _arguments->push_long((_ap++)->j); }
1008 inline void get_float() { _arguments->push_float((_ap++)->f); }
1009 inline void get_double() { _arguments->push_double((_ap++)->d);}
1010 inline void get_object() { _arguments->push_oop(Handle((oop *)(_ap++)->l, false)); }
1011
1012 inline void set_ap(const jvalue *rap) { _ap = rap; }
1013
1014 public:
1015 JNI_ArgumentPusherArray(Symbol* signature, const jvalue *rap)
1016 : JNI_ArgumentPusher(signature) {
1017 set_ap(rap);
1018 }
1019 JNI_ArgumentPusherArray(jmethodID method_id, const jvalue *rap)
1020 : JNI_ArgumentPusher(Method::resolve_jmethod_id(method_id)->signature()) {
1021 set_ap(rap);
1022 }
1023
1024 // Optimized path if we have the bitvector form of signature
1025 void iterate( uint64_t fingerprint ) {
1026 if (fingerprint == (uint64_t)CONST64(-1)) {
1027 SignatureIterator::iterate(); // Must be too many arguments
1028 } else {
1029 _return_type = (BasicType)((fingerprint >> static_feature_size) &
1030 result_feature_mask);
1031 assert(fingerprint, "Fingerprint should not be 0");
1032 fingerprint = fingerprint >> (static_feature_size + result_feature_size);
1033 while ( 1 ) {
1034 switch ( fingerprint & parameter_feature_mask ) {
1035 case bool_parm:
1036 get_bool();
1037 break;
1038 case char_parm:
1039 get_char();
1040 break;
1041 case short_parm:
1042 get_short();
1043 break;
1044 case byte_parm:
1045 get_byte();
1046 break;
1047 case int_parm:
1048 get_int();
1049 break;
1050 case obj_parm:
1051 get_object();
1052 break;
1053 case long_parm:
1054 get_long();
1055 break;
1056 case float_parm:
1057 get_float();
1058 break;
1059 case double_parm:
1060 get_double();
1061 break;
1062 case done_parm:
1063 return;
1064 break;
1065 default:
1066 ShouldNotReachHere();
1067 break;
1068 }
1069 fingerprint >>= parameter_feature_size;
1070 }
1071 }
1072 }
1073 };
1074
1075
1076 enum JNICallType {
1077 JNI_STATIC,
1078 JNI_VIRTUAL,
1079 JNI_NONVIRTUAL
1080 };
1081
1082
1083
1084 static void jni_invoke_static(JNIEnv *env, JavaValue* result, jobject receiver, JNICallType call_type, jmethodID method_id, JNI_ArgumentPusher *args, TRAPS) {
1085 methodHandle method(THREAD, Method::resolve_jmethod_id(method_id));
1086
1087 // Create object to hold arguments for the JavaCall, and associate it with
1088 // the jni parser
1089 ResourceMark rm(THREAD);
1090 int number_of_parameters = method->size_of_parameters();
1091 JavaCallArguments java_args(number_of_parameters);
1092 args->set_java_argument_object(&java_args);
1093
1094 assert(method->is_static(), "method should be static");
1095
1096 // Fill out JavaCallArguments object
1097 args->iterate( Fingerprinter(method).fingerprint() );
1098 // Initialize result type
1099 result->set_type(args->get_ret_type());
1100
1101 // Invoke the method. Result is returned as oop.
1102 JavaCalls::call(result, method, &java_args, CHECK);
1103
1104 // Convert result
1105 if (result->get_type() == T_OBJECT || result->get_type() == T_ARRAY) {
1106 result->set_jobject(JNIHandles::make_local(env, (oop) result->get_jobject()));
1107 }
1108 }
1109
1110
1111 static void jni_invoke_nonstatic(JNIEnv *env, JavaValue* result, jobject receiver, JNICallType call_type, jmethodID method_id, JNI_ArgumentPusher *args, TRAPS) {
1112 oop recv = JNIHandles::resolve(receiver);
1113 if (recv == NULL) {
1114 THROW(vmSymbols::java_lang_NullPointerException());
1115 }
1116 Handle h_recv(THREAD, recv);
1117
1118 int number_of_parameters;
1119 Method* selected_method;
1120 {
1121 Method* m = Method::resolve_jmethod_id(method_id);
1122 number_of_parameters = m->size_of_parameters();
1123 Klass* holder = m->method_holder();
1124 if (call_type != JNI_VIRTUAL) {
1125 selected_method = m;
1126 } else if (!m->has_itable_index()) {
1127 // non-interface call -- for that little speed boost, don't handlize
1128 debug_only(NoSafepointVerifier nosafepoint;)
1129 // jni_GetMethodID makes sure class is linked and initialized
1130 // so m should have a valid vtable index.
1131 assert(m->valid_vtable_index(), "no valid vtable index");
1132 int vtbl_index = m->vtable_index();
1133 if (vtbl_index != Method::nonvirtual_vtable_index) {
1134 selected_method = h_recv->klass()->method_at_vtable(vtbl_index);
1135 } else {
1136 // final method
1137 selected_method = m;
1138 }
1139 } else {
1140 // interface call
1141 KlassHandle h_holder(THREAD, holder);
1142
1143 int itbl_index = m->itable_index();
1144 Klass* k = h_recv->klass();
1145 selected_method = InstanceKlass::cast(k)->method_at_itable(h_holder(), itbl_index, CHECK);
1146 }
1147 }
1148
1149 methodHandle method(THREAD, selected_method);
1150
1151 // Create object to hold arguments for the JavaCall, and associate it with
1152 // the jni parser
1153 ResourceMark rm(THREAD);
1154 JavaCallArguments java_args(number_of_parameters);
1155 args->set_java_argument_object(&java_args);
1156
1157 // handle arguments
1158 assert(!method->is_static(), "method should not be static");
1159 args->push_receiver(h_recv); // Push jobject handle
1160
1161 // Fill out JavaCallArguments object
1162 args->iterate( Fingerprinter(method).fingerprint() );
1163 // Initialize result type
1164 result->set_type(args->get_ret_type());
1165
1166 // Invoke the method. Result is returned as oop.
1167 JavaCalls::call(result, method, &java_args, CHECK);
1168
1169 // Convert result
1170 if (result->get_type() == T_OBJECT || result->get_type() == T_ARRAY) {
1171 result->set_jobject(JNIHandles::make_local(env, (oop) result->get_jobject()));
1172 }
1173 }
1174
1175
1176 static instanceOop alloc_object(jclass clazz, TRAPS) {
1177 KlassHandle k(THREAD, java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz)));
1178 if (k == NULL) {
1179 ResourceMark rm(THREAD);
1180 THROW_(vmSymbols::java_lang_InstantiationException(), NULL);
1181 }
1182 k()->check_valid_for_instantiation(false, CHECK_NULL);
1183 InstanceKlass::cast(k())->initialize(CHECK_NULL);
1184 instanceOop ih = InstanceKlass::cast(k())->allocate_instance(THREAD);
1185 return ih;
1186 }
1187
1188 DT_RETURN_MARK_DECL(AllocObject, jobject
1189 , HOTSPOT_JNI_ALLOCOBJECT_RETURN(_ret_ref));
1190
1191 JNI_ENTRY(jobject, jni_AllocObject(JNIEnv *env, jclass clazz))
1192 JNIWrapper("AllocObject");
1193
1194 HOTSPOT_JNI_ALLOCOBJECT_ENTRY(env, clazz);
1195
1196 jobject ret = NULL;
1197 DT_RETURN_MARK(AllocObject, jobject, (const jobject&)ret);
1198
1199 instanceOop i = alloc_object(clazz, CHECK_NULL);
1200 ret = JNIHandles::make_local(env, i);
1201 return ret;
1202 JNI_END
1203
1204 DT_RETURN_MARK_DECL(NewObjectA, jobject
1205 , HOTSPOT_JNI_NEWOBJECTA_RETURN(_ret_ref));
1206
1207 JNI_ENTRY(jobject, jni_NewObjectA(JNIEnv *env, jclass clazz, jmethodID methodID, const jvalue *args))
1208 JNIWrapper("NewObjectA");
1209
1210 HOTSPOT_JNI_NEWOBJECTA_ENTRY(env, clazz, (uintptr_t) methodID);
1211
1212 jobject obj = NULL;
1213 DT_RETURN_MARK(NewObjectA, jobject, (const jobject)obj);
1214
1215 instanceOop i = alloc_object(clazz, CHECK_NULL);
1216 obj = JNIHandles::make_local(env, i);
1217 JavaValue jvalue(T_VOID);
1218 JNI_ArgumentPusherArray ap(methodID, args);
1219 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_NULL);
1220 return obj;
1221 JNI_END
1222
1223
1224 DT_RETURN_MARK_DECL(NewObjectV, jobject
1225 , HOTSPOT_JNI_NEWOBJECTV_RETURN(_ret_ref));
1226
1227 JNI_ENTRY(jobject, jni_NewObjectV(JNIEnv *env, jclass clazz, jmethodID methodID, va_list args))
1228 JNIWrapper("NewObjectV");
1229
1230 HOTSPOT_JNI_NEWOBJECTV_ENTRY(env, clazz, (uintptr_t) methodID);
1231
1232 jobject obj = NULL;
1233 DT_RETURN_MARK(NewObjectV, jobject, (const jobject&)obj);
1234
1235 instanceOop i = alloc_object(clazz, CHECK_NULL);
1236 obj = JNIHandles::make_local(env, i);
1237 JavaValue jvalue(T_VOID);
1238 JNI_ArgumentPusherVaArg ap(methodID, args);
1239 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_NULL);
1240 return obj;
1241 JNI_END
1242
1243
1244 DT_RETURN_MARK_DECL(NewObject, jobject
1245 , HOTSPOT_JNI_NEWOBJECT_RETURN(_ret_ref));
1246
1247 JNI_ENTRY(jobject, jni_NewObject(JNIEnv *env, jclass clazz, jmethodID methodID, ...))
1248 JNIWrapper("NewObject");
1249
1250 HOTSPOT_JNI_NEWOBJECT_ENTRY(env, clazz, (uintptr_t) methodID);
1251
1252 jobject obj = NULL;
1253 DT_RETURN_MARK(NewObject, jobject, (const jobject&)obj);
1254
1255 instanceOop i = alloc_object(clazz, CHECK_NULL);
1256 obj = JNIHandles::make_local(env, i);
1257 va_list args;
1258 va_start(args, methodID);
1259 JavaValue jvalue(T_VOID);
1260 JNI_ArgumentPusherVaArg ap(methodID, args);
1261 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_NULL);
1262 va_end(args);
1263 return obj;
1264 JNI_END
1265
1266
1267 JNI_ENTRY(jclass, jni_GetObjectClass(JNIEnv *env, jobject obj))
1268 JNIWrapper("GetObjectClass");
1269
1270 HOTSPOT_JNI_GETOBJECTCLASS_ENTRY(env, obj);
1271
1272 Klass* k = JNIHandles::resolve_non_null(obj)->klass();
1273 jclass ret =
1274 (jclass) JNIHandles::make_local(env, k->java_mirror());
1275
1276 HOTSPOT_JNI_GETOBJECTCLASS_RETURN(ret);
1277 return ret;
1278 JNI_END
1279
1280 JNI_QUICK_ENTRY(jboolean, jni_IsInstanceOf(JNIEnv *env, jobject obj, jclass clazz))
1281 JNIWrapper("IsInstanceOf");
1282
1283 HOTSPOT_JNI_ISINSTANCEOF_ENTRY(env, obj, clazz);
1284
1285 jboolean ret = JNI_TRUE;
1286 if (obj != NULL) {
1287 ret = JNI_FALSE;
1288 Klass* k = java_lang_Class::as_Klass(
1289 JNIHandles::resolve_non_null(clazz));
1290 if (k != NULL) {
1291 ret = JNIHandles::resolve_non_null(obj)->is_a(k) ? JNI_TRUE : JNI_FALSE;
1292 }
1293 }
1294
1295 HOTSPOT_JNI_ISINSTANCEOF_RETURN(ret);
1296 return ret;
1297 JNI_END
1298
1299
1300 static jmethodID get_method_id(JNIEnv *env, jclass clazz, const char *name_str,
1301 const char *sig, bool is_static, TRAPS) {
1302 // %%%% This code should probably just call into a method in the LinkResolver
1303 //
1304 // The class should have been loaded (we have an instance of the class
1305 // passed in) so the method and signature should already be in the symbol
1306 // table. If they're not there, the method doesn't exist.
1307 const char *name_to_probe = (name_str == NULL)
1308 ? vmSymbols::object_initializer_name()->as_C_string()
1309 : name_str;
1310 TempNewSymbol name = SymbolTable::probe(name_to_probe, (int)strlen(name_to_probe));
1311 TempNewSymbol signature = SymbolTable::probe(sig, (int)strlen(sig));
1312
1313 if (name == NULL || signature == NULL) {
1314 THROW_MSG_0(vmSymbols::java_lang_NoSuchMethodError(), name_str);
1315 }
1316
1317 // Throw a NoSuchMethodError exception if we have an instance of a
1318 // primitive java.lang.Class
1319 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(clazz))) {
1320 THROW_MSG_0(vmSymbols::java_lang_NoSuchMethodError(), name_str);
1321 }
1322
1323 KlassHandle klass(THREAD,
1324 java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz)));
1325
1326 // Make sure class is linked and initialized before handing id's out to
1327 // Method*s.
1328 klass()->initialize(CHECK_NULL);
1329
1330 Method* m;
1331 if (name == vmSymbols::object_initializer_name() ||
1332 name == vmSymbols::class_initializer_name()) {
1333 // Never search superclasses for constructors
1334 if (klass->is_instance_klass()) {
1335 m = InstanceKlass::cast(klass())->find_method(name, signature);
1336 } else {
1337 m = NULL;
1338 }
1339 } else {
1340 m = klass->lookup_method(name, signature);
1341 if (m == NULL && klass->is_instance_klass()) {
1342 m = InstanceKlass::cast(klass())->lookup_method_in_ordered_interfaces(name, signature);
1343 }
1344 }
1345 if (m == NULL || (m->is_static() != is_static)) {
1346 THROW_MSG_0(vmSymbols::java_lang_NoSuchMethodError(), name_str);
1347 }
1348 return m->jmethod_id();
1349 }
1350
1351
1352 JNI_ENTRY(jmethodID, jni_GetMethodID(JNIEnv *env, jclass clazz,
1353 const char *name, const char *sig))
1354 JNIWrapper("GetMethodID");
1355 HOTSPOT_JNI_GETMETHODID_ENTRY(env, clazz, (char *) name, (char *) sig);
1356 jmethodID ret = get_method_id(env, clazz, name, sig, false, thread);
1357 HOTSPOT_JNI_GETMETHODID_RETURN((uintptr_t) ret);
1358 return ret;
1359 JNI_END
1360
1361
1362 JNI_ENTRY(jmethodID, jni_GetStaticMethodID(JNIEnv *env, jclass clazz,
1363 const char *name, const char *sig))
1364 JNIWrapper("GetStaticMethodID");
1365 HOTSPOT_JNI_GETSTATICMETHODID_ENTRY(env, (char *) clazz, (char *) name, (char *)sig);
1366 jmethodID ret = get_method_id(env, clazz, name, sig, true, thread);
1367 HOTSPOT_JNI_GETSTATICMETHODID_RETURN((uintptr_t) ret);
1368 return ret;
1369 JNI_END
1370
1371
1372
1373 //
1374 // Calling Methods
1375 //
1376
1377
1378 #define DEFINE_CALLMETHOD(ResultType, Result, Tag \
1379 , EntryProbe, ReturnProbe) \
1380 \
1381 DT_RETURN_MARK_DECL_FOR(Result, Call##Result##Method, ResultType \
1382 , ReturnProbe); \
1383 \
1384 JNI_ENTRY(ResultType, \
1385 jni_Call##Result##Method(JNIEnv *env, jobject obj, jmethodID methodID, ...)) \
1386 JNIWrapper("Call" XSTR(Result) "Method"); \
1387 \
1388 EntryProbe; \
1389 ResultType ret = 0;\
1390 DT_RETURN_MARK_FOR(Result, Call##Result##Method, ResultType, \
1391 (const ResultType&)ret);\
1392 \
1393 va_list args; \
1394 va_start(args, methodID); \
1395 JavaValue jvalue(Tag); \
1396 JNI_ArgumentPusherVaArg ap(methodID, args); \
1397 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK_0); \
1398 va_end(args); \
1399 ret = jvalue.get_##ResultType(); \
1400 return ret;\
1401 JNI_END
1402
1403 // the runtime type of subword integral basic types is integer
1404 DEFINE_CALLMETHOD(jboolean, Boolean, T_BOOLEAN
1405 , HOTSPOT_JNI_CALLBOOLEANMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1406 HOTSPOT_JNI_CALLBOOLEANMETHOD_RETURN(_ret_ref))
1407 DEFINE_CALLMETHOD(jbyte, Byte, T_BYTE
1408 , HOTSPOT_JNI_CALLBYTEMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1409 HOTSPOT_JNI_CALLBYTEMETHOD_RETURN(_ret_ref))
1410 DEFINE_CALLMETHOD(jchar, Char, T_CHAR
1411 , HOTSPOT_JNI_CALLCHARMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1412 HOTSPOT_JNI_CALLCHARMETHOD_RETURN(_ret_ref))
1413 DEFINE_CALLMETHOD(jshort, Short, T_SHORT
1414 , HOTSPOT_JNI_CALLSHORTMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1415 HOTSPOT_JNI_CALLSHORTMETHOD_RETURN(_ret_ref))
1416
1417 DEFINE_CALLMETHOD(jobject, Object, T_OBJECT
1418 , HOTSPOT_JNI_CALLOBJECTMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1419 HOTSPOT_JNI_CALLOBJECTMETHOD_RETURN(_ret_ref))
1420 DEFINE_CALLMETHOD(jint, Int, T_INT,
1421 HOTSPOT_JNI_CALLINTMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1422 HOTSPOT_JNI_CALLINTMETHOD_RETURN(_ret_ref))
1423 DEFINE_CALLMETHOD(jlong, Long, T_LONG
1424 , HOTSPOT_JNI_CALLLONGMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1425 HOTSPOT_JNI_CALLLONGMETHOD_RETURN(_ret_ref))
1426 // Float and double probes don't return value because dtrace doesn't currently support it
1427 DEFINE_CALLMETHOD(jfloat, Float, T_FLOAT
1428 , HOTSPOT_JNI_CALLFLOATMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1429 HOTSPOT_JNI_CALLFLOATMETHOD_RETURN())
1430 DEFINE_CALLMETHOD(jdouble, Double, T_DOUBLE
1431 , HOTSPOT_JNI_CALLDOUBLEMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1432 HOTSPOT_JNI_CALLDOUBLEMETHOD_RETURN())
1433
1434 #define DEFINE_CALLMETHODV(ResultType, Result, Tag \
1435 , EntryProbe, ReturnProbe) \
1436 \
1437 DT_RETURN_MARK_DECL_FOR(Result, Call##Result##MethodV, ResultType \
1438 , ReturnProbe); \
1439 \
1440 JNI_ENTRY(ResultType, \
1441 jni_Call##Result##MethodV(JNIEnv *env, jobject obj, jmethodID methodID, va_list args)) \
1442 JNIWrapper("Call" XSTR(Result) "MethodV"); \
1443 \
1444 EntryProbe;\
1445 ResultType ret = 0;\
1446 DT_RETURN_MARK_FOR(Result, Call##Result##MethodV, ResultType, \
1447 (const ResultType&)ret);\
1448 \
1449 JavaValue jvalue(Tag); \
1450 JNI_ArgumentPusherVaArg ap(methodID, args); \
1451 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK_0); \
1452 ret = jvalue.get_##ResultType(); \
1453 return ret;\
1454 JNI_END
1455
1456 // the runtime type of subword integral basic types is integer
1457 DEFINE_CALLMETHODV(jboolean, Boolean, T_BOOLEAN
1458 , HOTSPOT_JNI_CALLBOOLEANMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1459 HOTSPOT_JNI_CALLBOOLEANMETHODV_RETURN(_ret_ref))
1460 DEFINE_CALLMETHODV(jbyte, Byte, T_BYTE
1461 , HOTSPOT_JNI_CALLBYTEMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1462 HOTSPOT_JNI_CALLBYTEMETHODV_RETURN(_ret_ref))
1463 DEFINE_CALLMETHODV(jchar, Char, T_CHAR
1464 , HOTSPOT_JNI_CALLCHARMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1465 HOTSPOT_JNI_CALLCHARMETHODV_RETURN(_ret_ref))
1466 DEFINE_CALLMETHODV(jshort, Short, T_SHORT
1467 , HOTSPOT_JNI_CALLSHORTMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1468 HOTSPOT_JNI_CALLSHORTMETHODV_RETURN(_ret_ref))
1469
1470 DEFINE_CALLMETHODV(jobject, Object, T_OBJECT
1471 , HOTSPOT_JNI_CALLOBJECTMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1472 HOTSPOT_JNI_CALLOBJECTMETHODV_RETURN(_ret_ref))
1473 DEFINE_CALLMETHODV(jint, Int, T_INT,
1474 HOTSPOT_JNI_CALLINTMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1475 HOTSPOT_JNI_CALLINTMETHODV_RETURN(_ret_ref))
1476 DEFINE_CALLMETHODV(jlong, Long, T_LONG
1477 , HOTSPOT_JNI_CALLLONGMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1478 HOTSPOT_JNI_CALLLONGMETHODV_RETURN(_ret_ref))
1479 // Float and double probes don't return value because dtrace doesn't currently support it
1480 DEFINE_CALLMETHODV(jfloat, Float, T_FLOAT
1481 , HOTSPOT_JNI_CALLFLOATMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1482 HOTSPOT_JNI_CALLFLOATMETHODV_RETURN())
1483 DEFINE_CALLMETHODV(jdouble, Double, T_DOUBLE
1484 , HOTSPOT_JNI_CALLDOUBLEMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1485 HOTSPOT_JNI_CALLDOUBLEMETHODV_RETURN())
1486
1487 #define DEFINE_CALLMETHODA(ResultType, Result, Tag \
1488 , EntryProbe, ReturnProbe) \
1489 \
1490 DT_RETURN_MARK_DECL_FOR(Result, Call##Result##MethodA, ResultType \
1491 , ReturnProbe); \
1492 \
1493 JNI_ENTRY(ResultType, \
1494 jni_Call##Result##MethodA(JNIEnv *env, jobject obj, jmethodID methodID, const jvalue *args)) \
1495 JNIWrapper("Call" XSTR(Result) "MethodA"); \
1496 EntryProbe; \
1497 ResultType ret = 0;\
1498 DT_RETURN_MARK_FOR(Result, Call##Result##MethodA, ResultType, \
1499 (const ResultType&)ret);\
1500 \
1501 JavaValue jvalue(Tag); \
1502 JNI_ArgumentPusherArray ap(methodID, args); \
1503 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK_0); \
1504 ret = jvalue.get_##ResultType(); \
1505 return ret;\
1506 JNI_END
1507
1508 // the runtime type of subword integral basic types is integer
1509 DEFINE_CALLMETHODA(jboolean, Boolean, T_BOOLEAN
1510 , HOTSPOT_JNI_CALLBOOLEANMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1511 HOTSPOT_JNI_CALLBOOLEANMETHODA_RETURN(_ret_ref))
1512 DEFINE_CALLMETHODA(jbyte, Byte, T_BYTE
1513 , HOTSPOT_JNI_CALLBYTEMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1514 HOTSPOT_JNI_CALLBYTEMETHODA_RETURN(_ret_ref))
1515 DEFINE_CALLMETHODA(jchar, Char, T_CHAR
1516 , HOTSPOT_JNI_CALLCHARMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1517 HOTSPOT_JNI_CALLCHARMETHODA_RETURN(_ret_ref))
1518 DEFINE_CALLMETHODA(jshort, Short, T_SHORT
1519 , HOTSPOT_JNI_CALLSHORTMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1520 HOTSPOT_JNI_CALLSHORTMETHODA_RETURN(_ret_ref))
1521
1522 DEFINE_CALLMETHODA(jobject, Object, T_OBJECT
1523 , HOTSPOT_JNI_CALLOBJECTMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1524 HOTSPOT_JNI_CALLOBJECTMETHODA_RETURN(_ret_ref))
1525 DEFINE_CALLMETHODA(jint, Int, T_INT,
1526 HOTSPOT_JNI_CALLINTMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1527 HOTSPOT_JNI_CALLINTMETHODA_RETURN(_ret_ref))
1528 DEFINE_CALLMETHODA(jlong, Long, T_LONG
1529 , HOTSPOT_JNI_CALLLONGMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1530 HOTSPOT_JNI_CALLLONGMETHODA_RETURN(_ret_ref))
1531 // Float and double probes don't return value because dtrace doesn't currently support it
1532 DEFINE_CALLMETHODA(jfloat, Float, T_FLOAT
1533 , HOTSPOT_JNI_CALLFLOATMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1534 HOTSPOT_JNI_CALLFLOATMETHODA_RETURN())
1535 DEFINE_CALLMETHODA(jdouble, Double, T_DOUBLE
1536 , HOTSPOT_JNI_CALLDOUBLEMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1537 HOTSPOT_JNI_CALLDOUBLEMETHODA_RETURN())
1538
1539 DT_VOID_RETURN_MARK_DECL(CallVoidMethod, HOTSPOT_JNI_CALLVOIDMETHOD_RETURN());
1540 DT_VOID_RETURN_MARK_DECL(CallVoidMethodV, HOTSPOT_JNI_CALLVOIDMETHODV_RETURN());
1541 DT_VOID_RETURN_MARK_DECL(CallVoidMethodA, HOTSPOT_JNI_CALLVOIDMETHODA_RETURN());
1542
1543
1544 JNI_ENTRY(void, jni_CallVoidMethod(JNIEnv *env, jobject obj, jmethodID methodID, ...))
1545 JNIWrapper("CallVoidMethod");
1546 HOTSPOT_JNI_CALLVOIDMETHOD_ENTRY(env, obj, (uintptr_t) methodID);
1547 DT_VOID_RETURN_MARK(CallVoidMethod);
1548
1549 va_list args;
1550 va_start(args, methodID);
1551 JavaValue jvalue(T_VOID);
1552 JNI_ArgumentPusherVaArg ap(methodID, args);
1553 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK);
1554 va_end(args);
1555 JNI_END
1556
1557
1558 JNI_ENTRY(void, jni_CallVoidMethodV(JNIEnv *env, jobject obj, jmethodID methodID, va_list args))
1559 JNIWrapper("CallVoidMethodV");
1560 HOTSPOT_JNI_CALLVOIDMETHODV_ENTRY(env, obj, (uintptr_t) methodID);
1561 DT_VOID_RETURN_MARK(CallVoidMethodV);
1562
1563 JavaValue jvalue(T_VOID);
1564 JNI_ArgumentPusherVaArg ap(methodID, args);
1565 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK);
1566 JNI_END
1567
1568
1569 JNI_ENTRY(void, jni_CallVoidMethodA(JNIEnv *env, jobject obj, jmethodID methodID, const jvalue *args))
1570 JNIWrapper("CallVoidMethodA");
1571 HOTSPOT_JNI_CALLVOIDMETHODA_ENTRY(env, obj, (uintptr_t) methodID);
1572 DT_VOID_RETURN_MARK(CallVoidMethodA);
1573
1574 JavaValue jvalue(T_VOID);
1575 JNI_ArgumentPusherArray ap(methodID, args);
1576 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK);
1577 JNI_END
1578
1579
1580
1581 #define DEFINE_CALLNONVIRTUALMETHOD(ResultType, Result, Tag \
1582 , EntryProbe, ReturnProbe) \
1583 \
1584 DT_RETURN_MARK_DECL_FOR(Result, CallNonvirtual##Result##Method, ResultType \
1585 , ReturnProbe);\
1586 \
1587 JNI_ENTRY(ResultType, \
1588 jni_CallNonvirtual##Result##Method(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, ...)) \
1589 JNIWrapper("CallNonvitual" XSTR(Result) "Method"); \
1590 \
1591 EntryProbe;\
1592 ResultType ret;\
1593 DT_RETURN_MARK_FOR(Result, CallNonvirtual##Result##Method, ResultType, \
1594 (const ResultType&)ret);\
1595 \
1596 va_list args; \
1597 va_start(args, methodID); \
1598 JavaValue jvalue(Tag); \
1599 JNI_ArgumentPusherVaArg ap(methodID, args); \
1600 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_0); \
1601 va_end(args); \
1602 ret = jvalue.get_##ResultType(); \
1603 return ret;\
1604 JNI_END
1605
1606 // the runtime type of subword integral basic types is integer
1607 DEFINE_CALLNONVIRTUALMETHOD(jboolean, Boolean, T_BOOLEAN
1608 , HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1609 HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHOD_RETURN(_ret_ref))
1610 DEFINE_CALLNONVIRTUALMETHOD(jbyte, Byte, T_BYTE
1611 , HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1612 HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHOD_RETURN(_ret_ref))
1613 DEFINE_CALLNONVIRTUALMETHOD(jchar, Char, T_CHAR
1614 , HOTSPOT_JNI_CALLNONVIRTUALCHARMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1615 HOTSPOT_JNI_CALLNONVIRTUALCHARMETHOD_RETURN(_ret_ref))
1616 DEFINE_CALLNONVIRTUALMETHOD(jshort, Short, T_SHORT
1617 , HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1618 HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHOD_RETURN(_ret_ref))
1619
1620 DEFINE_CALLNONVIRTUALMETHOD(jobject, Object, T_OBJECT
1621 , HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1622 HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHOD_RETURN(_ret_ref))
1623 DEFINE_CALLNONVIRTUALMETHOD(jint, Int, T_INT
1624 , HOTSPOT_JNI_CALLNONVIRTUALINTMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1625 HOTSPOT_JNI_CALLNONVIRTUALINTMETHOD_RETURN(_ret_ref))
1626 DEFINE_CALLNONVIRTUALMETHOD(jlong, Long, T_LONG
1627 , HOTSPOT_JNI_CALLNONVIRTUALLONGMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1628 // Float and double probes don't return value because dtrace doesn't currently support it
1629 HOTSPOT_JNI_CALLNONVIRTUALLONGMETHOD_RETURN(_ret_ref))
1630 DEFINE_CALLNONVIRTUALMETHOD(jfloat, Float, T_FLOAT
1631 , HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1632 HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHOD_RETURN())
1633 DEFINE_CALLNONVIRTUALMETHOD(jdouble, Double, T_DOUBLE
1634 , HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1635 HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHOD_RETURN())
1636
1637 #define DEFINE_CALLNONVIRTUALMETHODV(ResultType, Result, Tag \
1638 , EntryProbe, ReturnProbe) \
1639 \
1640 DT_RETURN_MARK_DECL_FOR(Result, CallNonvirtual##Result##MethodV, ResultType \
1641 , ReturnProbe);\
1642 \
1643 JNI_ENTRY(ResultType, \
1644 jni_CallNonvirtual##Result##MethodV(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, va_list args)) \
1645 JNIWrapper("CallNonvitual" XSTR(Result) "MethodV"); \
1646 \
1647 EntryProbe;\
1648 ResultType ret;\
1649 DT_RETURN_MARK_FOR(Result, CallNonvirtual##Result##MethodV, ResultType, \
1650 (const ResultType&)ret);\
1651 \
1652 JavaValue jvalue(Tag); \
1653 JNI_ArgumentPusherVaArg ap(methodID, args); \
1654 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_0); \
1655 ret = jvalue.get_##ResultType(); \
1656 return ret;\
1657 JNI_END
1658
1659 // the runtime type of subword integral basic types is integer
1660 DEFINE_CALLNONVIRTUALMETHODV(jboolean, Boolean, T_BOOLEAN
1661 , HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1662 HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHODV_RETURN(_ret_ref))
1663 DEFINE_CALLNONVIRTUALMETHODV(jbyte, Byte, T_BYTE
1664 , HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1665 HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHODV_RETURN(_ret_ref))
1666 DEFINE_CALLNONVIRTUALMETHODV(jchar, Char, T_CHAR
1667 , HOTSPOT_JNI_CALLNONVIRTUALCHARMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1668 HOTSPOT_JNI_CALLNONVIRTUALCHARMETHODV_RETURN(_ret_ref))
1669 DEFINE_CALLNONVIRTUALMETHODV(jshort, Short, T_SHORT
1670 , HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1671 HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHODV_RETURN(_ret_ref))
1672
1673 DEFINE_CALLNONVIRTUALMETHODV(jobject, Object, T_OBJECT
1674 , HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1675 HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHODV_RETURN(_ret_ref))
1676 DEFINE_CALLNONVIRTUALMETHODV(jint, Int, T_INT
1677 , HOTSPOT_JNI_CALLNONVIRTUALINTMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1678 HOTSPOT_JNI_CALLNONVIRTUALINTMETHODV_RETURN(_ret_ref))
1679 DEFINE_CALLNONVIRTUALMETHODV(jlong, Long, T_LONG
1680 , HOTSPOT_JNI_CALLNONVIRTUALLONGMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1681 // Float and double probes don't return value because dtrace doesn't currently support it
1682 HOTSPOT_JNI_CALLNONVIRTUALLONGMETHODV_RETURN(_ret_ref))
1683 DEFINE_CALLNONVIRTUALMETHODV(jfloat, Float, T_FLOAT
1684 , HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1685 HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHODV_RETURN())
1686 DEFINE_CALLNONVIRTUALMETHODV(jdouble, Double, T_DOUBLE
1687 , HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1688 HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHODV_RETURN())
1689
1690 #define DEFINE_CALLNONVIRTUALMETHODA(ResultType, Result, Tag \
1691 , EntryProbe, ReturnProbe) \
1692 \
1693 DT_RETURN_MARK_DECL_FOR(Result, CallNonvirtual##Result##MethodA, ResultType \
1694 , ReturnProbe);\
1695 \
1696 JNI_ENTRY(ResultType, \
1697 jni_CallNonvirtual##Result##MethodA(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, const jvalue *args)) \
1698 JNIWrapper("CallNonvitual" XSTR(Result) "MethodA"); \
1699 \
1700 EntryProbe;\
1701 ResultType ret;\
1702 DT_RETURN_MARK_FOR(Result, CallNonvirtual##Result##MethodA, ResultType, \
1703 (const ResultType&)ret);\
1704 \
1705 JavaValue jvalue(Tag); \
1706 JNI_ArgumentPusherArray ap(methodID, args); \
1707 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_0); \
1708 ret = jvalue.get_##ResultType(); \
1709 return ret;\
1710 JNI_END
1711
1712 // the runtime type of subword integral basic types is integer
1713 DEFINE_CALLNONVIRTUALMETHODA(jboolean, Boolean, T_BOOLEAN
1714 , HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1715 HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHODA_RETURN(_ret_ref))
1716 DEFINE_CALLNONVIRTUALMETHODA(jbyte, Byte, T_BYTE
1717 , HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1718 HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHODA_RETURN(_ret_ref))
1719 DEFINE_CALLNONVIRTUALMETHODA(jchar, Char, T_CHAR
1720 , HOTSPOT_JNI_CALLNONVIRTUALCHARMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1721 HOTSPOT_JNI_CALLNONVIRTUALCHARMETHODA_RETURN(_ret_ref))
1722 DEFINE_CALLNONVIRTUALMETHODA(jshort, Short, T_SHORT
1723 , HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1724 HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHODA_RETURN(_ret_ref))
1725
1726 DEFINE_CALLNONVIRTUALMETHODA(jobject, Object, T_OBJECT
1727 , HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1728 HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHODA_RETURN(_ret_ref))
1729 DEFINE_CALLNONVIRTUALMETHODA(jint, Int, T_INT
1730 , HOTSPOT_JNI_CALLNONVIRTUALINTMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1731 HOTSPOT_JNI_CALLNONVIRTUALINTMETHODA_RETURN(_ret_ref))
1732 DEFINE_CALLNONVIRTUALMETHODA(jlong, Long, T_LONG
1733 , HOTSPOT_JNI_CALLNONVIRTUALLONGMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1734 // Float and double probes don't return value because dtrace doesn't currently support it
1735 HOTSPOT_JNI_CALLNONVIRTUALLONGMETHODA_RETURN(_ret_ref))
1736 DEFINE_CALLNONVIRTUALMETHODA(jfloat, Float, T_FLOAT
1737 , HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1738 HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHODA_RETURN())
1739 DEFINE_CALLNONVIRTUALMETHODA(jdouble, Double, T_DOUBLE
1740 , HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1741 HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHODA_RETURN())
1742
1743 DT_VOID_RETURN_MARK_DECL(CallNonvirtualVoidMethod
1744 , HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHOD_RETURN());
1745 DT_VOID_RETURN_MARK_DECL(CallNonvirtualVoidMethodV
1746 , HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHODV_RETURN());
1747 DT_VOID_RETURN_MARK_DECL(CallNonvirtualVoidMethodA
1748 , HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHODA_RETURN());
1749
1750 JNI_ENTRY(void, jni_CallNonvirtualVoidMethod(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, ...))
1751 JNIWrapper("CallNonvirtualVoidMethod");
1752
1753 HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHOD_ENTRY(env, obj, cls, (uintptr_t) methodID);
1754 DT_VOID_RETURN_MARK(CallNonvirtualVoidMethod);
1755
1756 va_list args;
1757 va_start(args, methodID);
1758 JavaValue jvalue(T_VOID);
1759 JNI_ArgumentPusherVaArg ap(methodID, args);
1760 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK);
1761 va_end(args);
1762 JNI_END
1763
1764
1765 JNI_ENTRY(void, jni_CallNonvirtualVoidMethodV(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, va_list args))
1766 JNIWrapper("CallNonvirtualVoidMethodV");
1767
1768 HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHODV_ENTRY(
1769 env, obj, cls, (uintptr_t) methodID);
1770 DT_VOID_RETURN_MARK(CallNonvirtualVoidMethodV);
1771
1772 JavaValue jvalue(T_VOID);
1773 JNI_ArgumentPusherVaArg ap(methodID, args);
1774 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK);
1775 JNI_END
1776
1777
1778 JNI_ENTRY(void, jni_CallNonvirtualVoidMethodA(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, const jvalue *args))
1779 JNIWrapper("CallNonvirtualVoidMethodA");
1780 HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHODA_ENTRY(
1781 env, obj, cls, (uintptr_t) methodID);
1782 DT_VOID_RETURN_MARK(CallNonvirtualVoidMethodA);
1783 JavaValue jvalue(T_VOID);
1784 JNI_ArgumentPusherArray ap(methodID, args);
1785 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK);
1786 JNI_END
1787
1788
1789
1790 #define DEFINE_CALLSTATICMETHOD(ResultType, Result, Tag \
1791 , EntryProbe, ResultProbe) \
1792 \
1793 DT_RETURN_MARK_DECL_FOR(Result, CallStatic##Result##Method, ResultType \
1794 , ResultProbe); \
1795 \
1796 JNI_ENTRY(ResultType, \
1797 jni_CallStatic##Result##Method(JNIEnv *env, jclass cls, jmethodID methodID, ...)) \
1798 JNIWrapper("CallStatic" XSTR(Result) "Method"); \
1799 \
1800 EntryProbe; \
1801 ResultType ret = 0;\
1802 DT_RETURN_MARK_FOR(Result, CallStatic##Result##Method, ResultType, \
1803 (const ResultType&)ret);\
1804 \
1805 va_list args; \
1806 va_start(args, methodID); \
1807 JavaValue jvalue(Tag); \
1808 JNI_ArgumentPusherVaArg ap(methodID, args); \
1809 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK_0); \
1810 va_end(args); \
1811 ret = jvalue.get_##ResultType(); \
1812 return ret;\
1813 JNI_END
1814
1815 // the runtime type of subword integral basic types is integer
1816 DEFINE_CALLSTATICMETHOD(jboolean, Boolean, T_BOOLEAN
1817 , HOTSPOT_JNI_CALLSTATICBOOLEANMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1818 HOTSPOT_JNI_CALLSTATICBOOLEANMETHOD_RETURN(_ret_ref));
1819 DEFINE_CALLSTATICMETHOD(jbyte, Byte, T_BYTE
1820 , HOTSPOT_JNI_CALLSTATICBYTEMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1821 HOTSPOT_JNI_CALLSTATICBYTEMETHOD_RETURN(_ret_ref));
1822 DEFINE_CALLSTATICMETHOD(jchar, Char, T_CHAR
1823 , HOTSPOT_JNI_CALLSTATICCHARMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1824 HOTSPOT_JNI_CALLSTATICCHARMETHOD_RETURN(_ret_ref));
1825 DEFINE_CALLSTATICMETHOD(jshort, Short, T_SHORT
1826 , HOTSPOT_JNI_CALLSTATICSHORTMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1827 HOTSPOT_JNI_CALLSTATICSHORTMETHOD_RETURN(_ret_ref));
1828
1829 DEFINE_CALLSTATICMETHOD(jobject, Object, T_OBJECT
1830 , HOTSPOT_JNI_CALLSTATICOBJECTMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1831 HOTSPOT_JNI_CALLSTATICOBJECTMETHOD_RETURN(_ret_ref));
1832 DEFINE_CALLSTATICMETHOD(jint, Int, T_INT
1833 , HOTSPOT_JNI_CALLSTATICINTMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1834 HOTSPOT_JNI_CALLSTATICINTMETHOD_RETURN(_ret_ref));
1835 DEFINE_CALLSTATICMETHOD(jlong, Long, T_LONG
1836 , HOTSPOT_JNI_CALLSTATICLONGMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1837 HOTSPOT_JNI_CALLSTATICLONGMETHOD_RETURN(_ret_ref));
1838 // Float and double probes don't return value because dtrace doesn't currently support it
1839 DEFINE_CALLSTATICMETHOD(jfloat, Float, T_FLOAT
1840 , HOTSPOT_JNI_CALLSTATICFLOATMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1841 HOTSPOT_JNI_CALLSTATICFLOATMETHOD_RETURN());
1842 DEFINE_CALLSTATICMETHOD(jdouble, Double, T_DOUBLE
1843 , HOTSPOT_JNI_CALLSTATICDOUBLEMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1844 HOTSPOT_JNI_CALLSTATICDOUBLEMETHOD_RETURN());
1845
1846 #define DEFINE_CALLSTATICMETHODV(ResultType, Result, Tag \
1847 , EntryProbe, ResultProbe) \
1848 \
1849 DT_RETURN_MARK_DECL_FOR(Result, CallStatic##Result##MethodV, ResultType \
1850 , ResultProbe); \
1851 \
1852 JNI_ENTRY(ResultType, \
1853 jni_CallStatic##Result##MethodV(JNIEnv *env, jclass cls, jmethodID methodID, va_list args)) \
1854 JNIWrapper("CallStatic" XSTR(Result) "MethodV"); \
1855 \
1856 EntryProbe; \
1857 ResultType ret = 0;\
1858 DT_RETURN_MARK_FOR(Result, CallStatic##Result##MethodV, ResultType, \
1859 (const ResultType&)ret);\
1860 \
1861 JavaValue jvalue(Tag); \
1862 JNI_ArgumentPusherVaArg ap(methodID, args); \
1863 /* Make sure class is initialized before trying to invoke its method */ \
1864 KlassHandle k(THREAD, java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls))); \
1865 k()->initialize(CHECK_0); \
1866 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK_0); \
1867 va_end(args); \
1868 ret = jvalue.get_##ResultType(); \
1869 return ret;\
1870 JNI_END
1871
1872 // the runtime type of subword integral basic types is integer
1873 DEFINE_CALLSTATICMETHODV(jboolean, Boolean, T_BOOLEAN
1874 , HOTSPOT_JNI_CALLSTATICBOOLEANMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1875 HOTSPOT_JNI_CALLSTATICBOOLEANMETHODV_RETURN(_ret_ref));
1876 DEFINE_CALLSTATICMETHODV(jbyte, Byte, T_BYTE
1877 , HOTSPOT_JNI_CALLSTATICBYTEMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1878 HOTSPOT_JNI_CALLSTATICBYTEMETHODV_RETURN(_ret_ref));
1879 DEFINE_CALLSTATICMETHODV(jchar, Char, T_CHAR
1880 , HOTSPOT_JNI_CALLSTATICCHARMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1881 HOTSPOT_JNI_CALLSTATICCHARMETHODV_RETURN(_ret_ref));
1882 DEFINE_CALLSTATICMETHODV(jshort, Short, T_SHORT
1883 , HOTSPOT_JNI_CALLSTATICSHORTMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1884 HOTSPOT_JNI_CALLSTATICSHORTMETHODV_RETURN(_ret_ref));
1885
1886 DEFINE_CALLSTATICMETHODV(jobject, Object, T_OBJECT
1887 , HOTSPOT_JNI_CALLSTATICOBJECTMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1888 HOTSPOT_JNI_CALLSTATICOBJECTMETHODV_RETURN(_ret_ref));
1889 DEFINE_CALLSTATICMETHODV(jint, Int, T_INT
1890 , HOTSPOT_JNI_CALLSTATICINTMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1891 HOTSPOT_JNI_CALLSTATICINTMETHODV_RETURN(_ret_ref));
1892 DEFINE_CALLSTATICMETHODV(jlong, Long, T_LONG
1893 , HOTSPOT_JNI_CALLSTATICLONGMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1894 HOTSPOT_JNI_CALLSTATICLONGMETHODV_RETURN(_ret_ref));
1895 // Float and double probes don't return value because dtrace doesn't currently support it
1896 DEFINE_CALLSTATICMETHODV(jfloat, Float, T_FLOAT
1897 , HOTSPOT_JNI_CALLSTATICFLOATMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1898 HOTSPOT_JNI_CALLSTATICFLOATMETHODV_RETURN());
1899 DEFINE_CALLSTATICMETHODV(jdouble, Double, T_DOUBLE
1900 , HOTSPOT_JNI_CALLSTATICDOUBLEMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1901 HOTSPOT_JNI_CALLSTATICDOUBLEMETHODV_RETURN());
1902
1903 #define DEFINE_CALLSTATICMETHODA(ResultType, Result, Tag \
1904 , EntryProbe, ResultProbe) \
1905 \
1906 DT_RETURN_MARK_DECL_FOR(Result, CallStatic##Result##MethodA, ResultType \
1907 , ResultProbe); \
1908 \
1909 JNI_ENTRY(ResultType, \
1910 jni_CallStatic##Result##MethodA(JNIEnv *env, jclass cls, jmethodID methodID, const jvalue *args)) \
1911 JNIWrapper("CallStatic" XSTR(Result) "MethodA"); \
1912 \
1913 EntryProbe; \
1914 ResultType ret = 0;\
1915 DT_RETURN_MARK_FOR(Result, CallStatic##Result##MethodA, ResultType, \
1916 (const ResultType&)ret);\
1917 \
1918 JavaValue jvalue(Tag); \
1919 JNI_ArgumentPusherArray ap(methodID, args); \
1920 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK_0); \
1921 ret = jvalue.get_##ResultType(); \
1922 return ret;\
1923 JNI_END
1924
1925 // the runtime type of subword integral basic types is integer
1926 DEFINE_CALLSTATICMETHODA(jboolean, Boolean, T_BOOLEAN
1927 , HOTSPOT_JNI_CALLSTATICBOOLEANMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1928 HOTSPOT_JNI_CALLSTATICBOOLEANMETHODA_RETURN(_ret_ref));
1929 DEFINE_CALLSTATICMETHODA(jbyte, Byte, T_BYTE
1930 , HOTSPOT_JNI_CALLSTATICBYTEMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1931 HOTSPOT_JNI_CALLSTATICBYTEMETHODA_RETURN(_ret_ref));
1932 DEFINE_CALLSTATICMETHODA(jchar, Char, T_CHAR
1933 , HOTSPOT_JNI_CALLSTATICCHARMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1934 HOTSPOT_JNI_CALLSTATICCHARMETHODA_RETURN(_ret_ref));
1935 DEFINE_CALLSTATICMETHODA(jshort, Short, T_SHORT
1936 , HOTSPOT_JNI_CALLSTATICSHORTMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1937 HOTSPOT_JNI_CALLSTATICSHORTMETHODA_RETURN(_ret_ref));
1938
1939 DEFINE_CALLSTATICMETHODA(jobject, Object, T_OBJECT
1940 , HOTSPOT_JNI_CALLSTATICOBJECTMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1941 HOTSPOT_JNI_CALLSTATICOBJECTMETHODA_RETURN(_ret_ref));
1942 DEFINE_CALLSTATICMETHODA(jint, Int, T_INT
1943 , HOTSPOT_JNI_CALLSTATICINTMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1944 HOTSPOT_JNI_CALLSTATICINTMETHODA_RETURN(_ret_ref));
1945 DEFINE_CALLSTATICMETHODA(jlong, Long, T_LONG
1946 , HOTSPOT_JNI_CALLSTATICLONGMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1947 HOTSPOT_JNI_CALLSTATICLONGMETHODA_RETURN(_ret_ref));
1948 // Float and double probes don't return value because dtrace doesn't currently support it
1949 DEFINE_CALLSTATICMETHODA(jfloat, Float, T_FLOAT
1950 , HOTSPOT_JNI_CALLSTATICFLOATMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1951 HOTSPOT_JNI_CALLSTATICFLOATMETHODA_RETURN());
1952 DEFINE_CALLSTATICMETHODA(jdouble, Double, T_DOUBLE
1953 , HOTSPOT_JNI_CALLSTATICDOUBLEMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1954 HOTSPOT_JNI_CALLSTATICDOUBLEMETHODA_RETURN());
1955
1956 DT_VOID_RETURN_MARK_DECL(CallStaticVoidMethod
1957 , HOTSPOT_JNI_CALLSTATICVOIDMETHOD_RETURN());
1958 DT_VOID_RETURN_MARK_DECL(CallStaticVoidMethodV
1959 , HOTSPOT_JNI_CALLSTATICVOIDMETHODV_RETURN());
1960 DT_VOID_RETURN_MARK_DECL(CallStaticVoidMethodA
1961 , HOTSPOT_JNI_CALLSTATICVOIDMETHODA_RETURN());
1962
1963 JNI_ENTRY(void, jni_CallStaticVoidMethod(JNIEnv *env, jclass cls, jmethodID methodID, ...))
1964 JNIWrapper("CallStaticVoidMethod");
1965 HOTSPOT_JNI_CALLSTATICVOIDMETHOD_ENTRY(env, cls, (uintptr_t) methodID);
1966 DT_VOID_RETURN_MARK(CallStaticVoidMethod);
1967
1968 va_list args;
1969 va_start(args, methodID);
1970 JavaValue jvalue(T_VOID);
1971 JNI_ArgumentPusherVaArg ap(methodID, args);
1972 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK);
1973 va_end(args);
1974 JNI_END
1975
1976
1977 JNI_ENTRY(void, jni_CallStaticVoidMethodV(JNIEnv *env, jclass cls, jmethodID methodID, va_list args))
1978 JNIWrapper("CallStaticVoidMethodV");
1979 HOTSPOT_JNI_CALLSTATICVOIDMETHODV_ENTRY(env, cls, (uintptr_t) methodID);
1980 DT_VOID_RETURN_MARK(CallStaticVoidMethodV);
1981
1982 JavaValue jvalue(T_VOID);
1983 JNI_ArgumentPusherVaArg ap(methodID, args);
1984 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK);
1985 JNI_END
1986
1987
1988 JNI_ENTRY(void, jni_CallStaticVoidMethodA(JNIEnv *env, jclass cls, jmethodID methodID, const jvalue *args))
1989 JNIWrapper("CallStaticVoidMethodA");
1990 HOTSPOT_JNI_CALLSTATICVOIDMETHODA_ENTRY(env, cls, (uintptr_t) methodID);
1991 DT_VOID_RETURN_MARK(CallStaticVoidMethodA);
1992
1993 JavaValue jvalue(T_VOID);
1994 JNI_ArgumentPusherArray ap(methodID, args);
1995 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK);
1996 JNI_END
1997
1998
1999 //
2000 // Accessing Fields
2001 //
2002
2003
2004 DT_RETURN_MARK_DECL(GetFieldID, jfieldID
2005 , HOTSPOT_JNI_GETFIELDID_RETURN((uintptr_t)_ret_ref));
2006
2007 JNI_ENTRY(jfieldID, jni_GetFieldID(JNIEnv *env, jclass clazz,
2008 const char *name, const char *sig))
2009 JNIWrapper("GetFieldID");
2010 HOTSPOT_JNI_GETFIELDID_ENTRY(env, clazz, (char *) name, (char *) sig);
2011 jfieldID ret = 0;
2012 DT_RETURN_MARK(GetFieldID, jfieldID, (const jfieldID&)ret);
2013
2014 // The class should have been loaded (we have an instance of the class
2015 // passed in) so the field and signature should already be in the symbol
2016 // table. If they're not there, the field doesn't exist.
2017 TempNewSymbol fieldname = SymbolTable::probe(name, (int)strlen(name));
2018 TempNewSymbol signame = SymbolTable::probe(sig, (int)strlen(sig));
2019 if (fieldname == NULL || signame == NULL) {
2020 THROW_MSG_0(vmSymbols::java_lang_NoSuchFieldError(), (char*) name);
2021 }
2022 KlassHandle k(THREAD,
2023 java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz)));
2024 // Make sure class is initialized before handing id's out to fields
2025 k()->initialize(CHECK_NULL);
2026
2027 fieldDescriptor fd;
2028 if (!k()->is_instance_klass() ||
2029 !InstanceKlass::cast(k())->find_field(fieldname, signame, false, &fd)) {
2030 THROW_MSG_0(vmSymbols::java_lang_NoSuchFieldError(), (char*) name);
2031 }
2032
2033 // A jfieldID for a non-static field is simply the offset of the field within the instanceOop
2034 // It may also have hash bits for k, if VerifyJNIFields is turned on.
2035 ret = jfieldIDWorkaround::to_instance_jfieldID(k(), fd.offset());
2036 return ret;
2037 JNI_END
2038
2039
2040 JNI_ENTRY(jobject, jni_GetObjectField(JNIEnv *env, jobject obj, jfieldID fieldID))
2041 JNIWrapper("GetObjectField");
2042 HOTSPOT_JNI_GETOBJECTFIELD_ENTRY(env, obj, (uintptr_t) fieldID);
2043 oop o = JNIHandles::resolve_non_null(obj);
2044 Klass* k = o->klass();
2045 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID);
2046 // Keep JVMTI addition small and only check enabled flag here.
2047 // jni_GetField_probe() assumes that is okay to create handles.
2048 if (JvmtiExport::should_post_field_access()) {
2049 o = JvmtiExport::jni_GetField_probe(thread, obj, o, k, fieldID, false);
2050 }
2051 jobject ret = JNIHandles::make_local(env, o->obj_field(offset));
2052 #if INCLUDE_ALL_GCS
2053 // If G1 is enabled and we are accessing the value of the referent
2054 // field in a reference object then we need to register a non-null
2055 // referent with the SATB barrier.
2056 if (UseG1GC) {
2057 bool needs_barrier = false;
2058
2059 if (ret != NULL &&
2060 offset == java_lang_ref_Reference::referent_offset &&
2061 InstanceKlass::cast(k)->reference_type() != REF_NONE) {
2062 assert(InstanceKlass::cast(k)->is_subclass_of(SystemDictionary::Reference_klass()), "sanity");
2063 needs_barrier = true;
2064 }
2065
2066 if (needs_barrier) {
2067 oop referent = JNIHandles::resolve(ret);
2068 G1SATBCardTableModRefBS::enqueue(referent);
2069 }
2070 }
2071 #endif // INCLUDE_ALL_GCS
2072 HOTSPOT_JNI_GETOBJECTFIELD_RETURN(ret);
2073 return ret;
2074 JNI_END
2075
2076
2077
2078 #define DEFINE_GETFIELD(Return,Fieldname,Result \
2079 , EntryProbe, ReturnProbe) \
2080 \
2081 DT_RETURN_MARK_DECL_FOR(Result, Get##Result##Field, Return \
2082 , ReturnProbe); \
2083 \
2084 JNI_QUICK_ENTRY(Return, jni_Get##Result##Field(JNIEnv *env, jobject obj, jfieldID fieldID)) \
2085 JNIWrapper("Get" XSTR(Result) "Field"); \
2086 \
2087 EntryProbe; \
2088 Return ret = 0;\
2089 DT_RETURN_MARK_FOR(Result, Get##Result##Field, Return, (const Return&)ret);\
2090 \
2091 oop o = JNIHandles::resolve_non_null(obj); \
2092 Klass* k = o->klass(); \
2093 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID); \
2094 /* Keep JVMTI addition small and only check enabled flag here. */ \
2095 /* jni_GetField_probe_nh() assumes that is not okay to create handles */ \
2096 /* and creates a ResetNoHandleMark. */ \
2097 if (JvmtiExport::should_post_field_access()) { \
2098 o = JvmtiExport::jni_GetField_probe_nh(thread, obj, o, k, fieldID, false); \
2099 } \
2100 ret = o->Fieldname##_field(offset); \
2101 return ret; \
2102 JNI_END
2103
2104 DEFINE_GETFIELD(jboolean, bool, Boolean
2105 , HOTSPOT_JNI_GETBOOLEANFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2106 HOTSPOT_JNI_GETBOOLEANFIELD_RETURN(_ret_ref))
2107 DEFINE_GETFIELD(jbyte, byte, Byte
2108 , HOTSPOT_JNI_GETBYTEFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2109 HOTSPOT_JNI_GETBYTEFIELD_RETURN(_ret_ref))
2110 DEFINE_GETFIELD(jchar, char, Char
2111 , HOTSPOT_JNI_GETCHARFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2112 HOTSPOT_JNI_GETCHARFIELD_RETURN(_ret_ref))
2113 DEFINE_GETFIELD(jshort, short, Short
2114 , HOTSPOT_JNI_GETSHORTFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2115 HOTSPOT_JNI_GETSHORTFIELD_RETURN(_ret_ref))
2116 DEFINE_GETFIELD(jint, int, Int
2117 , HOTSPOT_JNI_GETINTFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2118 HOTSPOT_JNI_GETINTFIELD_RETURN(_ret_ref))
2119 DEFINE_GETFIELD(jlong, long, Long
2120 , HOTSPOT_JNI_GETLONGFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2121 HOTSPOT_JNI_GETLONGFIELD_RETURN(_ret_ref))
2122 // Float and double probes don't return value because dtrace doesn't currently support it
2123 DEFINE_GETFIELD(jfloat, float, Float
2124 , HOTSPOT_JNI_GETFLOATFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2125 HOTSPOT_JNI_GETFLOATFIELD_RETURN())
2126 DEFINE_GETFIELD(jdouble, double, Double
2127 , HOTSPOT_JNI_GETDOUBLEFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2128 HOTSPOT_JNI_GETDOUBLEFIELD_RETURN())
2129
2130 address jni_GetBooleanField_addr() {
2131 return (address)jni_GetBooleanField;
2132 }
2133 address jni_GetByteField_addr() {
2134 return (address)jni_GetByteField;
2135 }
2136 address jni_GetCharField_addr() {
2137 return (address)jni_GetCharField;
2138 }
2139 address jni_GetShortField_addr() {
2140 return (address)jni_GetShortField;
2141 }
2142 address jni_GetIntField_addr() {
2143 return (address)jni_GetIntField;
2144 }
2145 address jni_GetLongField_addr() {
2146 return (address)jni_GetLongField;
2147 }
2148 address jni_GetFloatField_addr() {
2149 return (address)jni_GetFloatField;
2150 }
2151 address jni_GetDoubleField_addr() {
2152 return (address)jni_GetDoubleField;
2153 }
2154
2155 JNI_QUICK_ENTRY(void, jni_SetObjectField(JNIEnv *env, jobject obj, jfieldID fieldID, jobject value))
2156 JNIWrapper("SetObjectField");
2157 HOTSPOT_JNI_SETOBJECTFIELD_ENTRY(env, obj, (uintptr_t) fieldID, value);
2158 oop o = JNIHandles::resolve_non_null(obj);
2159 Klass* k = o->klass();
2160 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID);
2161 // Keep JVMTI addition small and only check enabled flag here.
2162 // jni_SetField_probe_nh() assumes that is not okay to create handles
2163 // and creates a ResetNoHandleMark.
2164 if (JvmtiExport::should_post_field_modification()) {
2165 jvalue field_value;
2166 field_value.l = value;
2167 o = JvmtiExport::jni_SetField_probe_nh(thread, obj, o, k, fieldID, false, 'L', (jvalue *)&field_value);
2168 }
2169 o->obj_field_put(offset, JNIHandles::resolve(value));
2170 HOTSPOT_JNI_SETOBJECTFIELD_RETURN();
2171 JNI_END
2172
2173
2174 #define DEFINE_SETFIELD(Argument,Fieldname,Result,SigType,unionType \
2175 , EntryProbe, ReturnProbe) \
2176 \
2177 JNI_QUICK_ENTRY(void, jni_Set##Result##Field(JNIEnv *env, jobject obj, jfieldID fieldID, Argument value)) \
2178 JNIWrapper("Set" XSTR(Result) "Field"); \
2179 \
2180 EntryProbe; \
2181 \
2182 oop o = JNIHandles::resolve_non_null(obj); \
2183 Klass* k = o->klass(); \
2184 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID); \
2185 /* Keep JVMTI addition small and only check enabled flag here. */ \
2186 /* jni_SetField_probe_nh() assumes that is not okay to create handles */ \
2187 /* and creates a ResetNoHandleMark. */ \
2188 if (JvmtiExport::should_post_field_modification()) { \
2189 jvalue field_value; \
2190 field_value.unionType = value; \
2191 o = JvmtiExport::jni_SetField_probe_nh(thread, obj, o, k, fieldID, false, SigType, (jvalue *)&field_value); \
2192 } \
2193 o->Fieldname##_field_put(offset, value); \
2194 ReturnProbe; \
2195 JNI_END
2196
2197 DEFINE_SETFIELD(jboolean, bool, Boolean, 'Z', z
2198 , HOTSPOT_JNI_SETBOOLEANFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value),
2199 HOTSPOT_JNI_SETBOOLEANFIELD_RETURN())
2200 DEFINE_SETFIELD(jbyte, byte, Byte, 'B', b
2201 , HOTSPOT_JNI_SETBYTEFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value),
2202 HOTSPOT_JNI_SETBYTEFIELD_RETURN())
2203 DEFINE_SETFIELD(jchar, char, Char, 'C', c
2204 , HOTSPOT_JNI_SETCHARFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value),
2205 HOTSPOT_JNI_SETCHARFIELD_RETURN())
2206 DEFINE_SETFIELD(jshort, short, Short, 'S', s
2207 , HOTSPOT_JNI_SETSHORTFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value),
2208 HOTSPOT_JNI_SETSHORTFIELD_RETURN())
2209 DEFINE_SETFIELD(jint, int, Int, 'I', i
2210 , HOTSPOT_JNI_SETINTFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value),
2211 HOTSPOT_JNI_SETINTFIELD_RETURN())
2212 DEFINE_SETFIELD(jlong, long, Long, 'J', j
2213 , HOTSPOT_JNI_SETLONGFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value),
2214 HOTSPOT_JNI_SETLONGFIELD_RETURN())
2215 // Float and double probes don't return value because dtrace doesn't currently support it
2216 DEFINE_SETFIELD(jfloat, float, Float, 'F', f
2217 , HOTSPOT_JNI_SETFLOATFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2218 HOTSPOT_JNI_SETFLOATFIELD_RETURN())
2219 DEFINE_SETFIELD(jdouble, double, Double, 'D', d
2220 , HOTSPOT_JNI_SETDOUBLEFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2221 HOTSPOT_JNI_SETDOUBLEFIELD_RETURN())
2222
2223 DT_RETURN_MARK_DECL(ToReflectedField, jobject
2224 , HOTSPOT_JNI_TOREFLECTEDFIELD_RETURN(_ret_ref));
2225
2226 JNI_ENTRY(jobject, jni_ToReflectedField(JNIEnv *env, jclass cls, jfieldID fieldID, jboolean isStatic))
2227 JNIWrapper("ToReflectedField");
2228 HOTSPOT_JNI_TOREFLECTEDFIELD_ENTRY(env, cls, (uintptr_t) fieldID, isStatic);
2229 jobject ret = NULL;
2230 DT_RETURN_MARK(ToReflectedField, jobject, (const jobject&)ret);
2231
2232 fieldDescriptor fd;
2233 bool found = false;
2234 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2235
2236 assert(jfieldIDWorkaround::is_static_jfieldID(fieldID) == (isStatic != 0), "invalid fieldID");
2237
2238 if (isStatic) {
2239 // Static field. The fieldID a JNIid specifying the field holder and the offset within the Klass*.
2240 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID);
2241 assert(id->is_static_field_id(), "invalid static field id");
2242 found = id->find_local_field(&fd);
2243 } else {
2244 // Non-static field. The fieldID is really the offset of the field within the instanceOop.
2245 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID);
2246 found = InstanceKlass::cast(k)->find_field_from_offset(offset, false, &fd);
2247 }
2248 assert(found, "bad fieldID passed into jni_ToReflectedField");
2249 oop reflected = Reflection::new_field(&fd, CHECK_NULL);
2250 ret = JNIHandles::make_local(env, reflected);
2251 return ret;
2252 JNI_END
2253
2254
2255 //
2256 // Accessing Static Fields
2257 //
2258 DT_RETURN_MARK_DECL(GetStaticFieldID, jfieldID
2259 , HOTSPOT_JNI_GETSTATICFIELDID_RETURN((uintptr_t)_ret_ref));
2260
2261 JNI_ENTRY(jfieldID, jni_GetStaticFieldID(JNIEnv *env, jclass clazz,
2262 const char *name, const char *sig))
2263 JNIWrapper("GetStaticFieldID");
2264 HOTSPOT_JNI_GETSTATICFIELDID_ENTRY(env, clazz, (char *) name, (char *) sig);
2265 jfieldID ret = NULL;
2266 DT_RETURN_MARK(GetStaticFieldID, jfieldID, (const jfieldID&)ret);
2267
2268 // The class should have been loaded (we have an instance of the class
2269 // passed in) so the field and signature should already be in the symbol
2270 // table. If they're not there, the field doesn't exist.
2271 TempNewSymbol fieldname = SymbolTable::probe(name, (int)strlen(name));
2272 TempNewSymbol signame = SymbolTable::probe(sig, (int)strlen(sig));
2273 if (fieldname == NULL || signame == NULL) {
2274 THROW_MSG_0(vmSymbols::java_lang_NoSuchFieldError(), (char*) name);
2275 }
2276 KlassHandle k(THREAD,
2277 java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz)));
2278 // Make sure class is initialized before handing id's out to static fields
2279 k()->initialize(CHECK_NULL);
2280
2281 fieldDescriptor fd;
2282 if (!k()->is_instance_klass() ||
2283 !InstanceKlass::cast(k())->find_field(fieldname, signame, true, &fd)) {
2284 THROW_MSG_0(vmSymbols::java_lang_NoSuchFieldError(), (char*) name);
2285 }
2286
2287 // A jfieldID for a static field is a JNIid specifying the field holder and the offset within the Klass*
2288 JNIid* id = fd.field_holder()->jni_id_for(fd.offset());
2289 debug_only(id->set_is_static_field_id();)
2290
2291 debug_only(id->verify(fd.field_holder()));
2292
2293 ret = jfieldIDWorkaround::to_static_jfieldID(id);
2294 return ret;
2295 JNI_END
2296
2297
2298 JNI_ENTRY(jobject, jni_GetStaticObjectField(JNIEnv *env, jclass clazz, jfieldID fieldID))
2299 JNIWrapper("GetStaticObjectField");
2300 HOTSPOT_JNI_GETSTATICOBJECTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID);
2301 #if INCLUDE_JNI_CHECK
2302 DEBUG_ONLY(Klass* param_k = jniCheck::validate_class(thread, clazz);)
2303 #endif // INCLUDE_JNI_CHECK
2304 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID);
2305 assert(id->is_static_field_id(), "invalid static field id");
2306 // Keep JVMTI addition small and only check enabled flag here.
2307 // jni_GetField_probe() assumes that is okay to create handles.
2308 if (JvmtiExport::should_post_field_access()) {
2309 JvmtiExport::jni_GetField_probe(thread, NULL, NULL, id->holder(), fieldID, true);
2310 }
2311 jobject ret = JNIHandles::make_local(id->holder()->java_mirror()->obj_field(id->offset()));
2312 HOTSPOT_JNI_GETSTATICOBJECTFIELD_RETURN(ret);
2313 return ret;
2314 JNI_END
2315
2316
2317 #define DEFINE_GETSTATICFIELD(Return,Fieldname,Result \
2318 , EntryProbe, ReturnProbe) \
2319 \
2320 DT_RETURN_MARK_DECL_FOR(Result, GetStatic##Result##Field, Return \
2321 , ReturnProbe); \
2322 \
2323 JNI_ENTRY(Return, jni_GetStatic##Result##Field(JNIEnv *env, jclass clazz, jfieldID fieldID)) \
2324 JNIWrapper("GetStatic" XSTR(Result) "Field"); \
2325 EntryProbe; \
2326 Return ret = 0;\
2327 DT_RETURN_MARK_FOR(Result, GetStatic##Result##Field, Return, \
2328 (const Return&)ret);\
2329 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID); \
2330 assert(id->is_static_field_id(), "invalid static field id"); \
2331 /* Keep JVMTI addition small and only check enabled flag here. */ \
2332 /* jni_GetField_probe() assumes that is okay to create handles. */ \
2333 if (JvmtiExport::should_post_field_access()) { \
2334 JvmtiExport::jni_GetField_probe(thread, NULL, NULL, id->holder(), fieldID, true); \
2335 } \
2336 ret = id->holder()->java_mirror()-> Fieldname##_field (id->offset()); \
2337 return ret;\
2338 JNI_END
2339
2340 DEFINE_GETSTATICFIELD(jboolean, bool, Boolean
2341 , HOTSPOT_JNI_GETSTATICBOOLEANFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICBOOLEANFIELD_RETURN(_ret_ref))
2342 DEFINE_GETSTATICFIELD(jbyte, byte, Byte
2343 , HOTSPOT_JNI_GETSTATICBYTEFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICBYTEFIELD_RETURN(_ret_ref) )
2344 DEFINE_GETSTATICFIELD(jchar, char, Char
2345 , HOTSPOT_JNI_GETSTATICCHARFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICCHARFIELD_RETURN(_ret_ref) )
2346 DEFINE_GETSTATICFIELD(jshort, short, Short
2347 , HOTSPOT_JNI_GETSTATICSHORTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICSHORTFIELD_RETURN(_ret_ref) )
2348 DEFINE_GETSTATICFIELD(jint, int, Int
2349 , HOTSPOT_JNI_GETSTATICINTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICINTFIELD_RETURN(_ret_ref) )
2350 DEFINE_GETSTATICFIELD(jlong, long, Long
2351 , HOTSPOT_JNI_GETSTATICLONGFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICLONGFIELD_RETURN(_ret_ref) )
2352 // Float and double probes don't return value because dtrace doesn't currently support it
2353 DEFINE_GETSTATICFIELD(jfloat, float, Float
2354 , HOTSPOT_JNI_GETSTATICFLOATFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICFLOATFIELD_RETURN() )
2355 DEFINE_GETSTATICFIELD(jdouble, double, Double
2356 , HOTSPOT_JNI_GETSTATICDOUBLEFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICDOUBLEFIELD_RETURN() )
2357
2358 JNI_ENTRY(void, jni_SetStaticObjectField(JNIEnv *env, jclass clazz, jfieldID fieldID, jobject value))
2359 JNIWrapper("SetStaticObjectField");
2360 HOTSPOT_JNI_SETSTATICOBJECTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value);
2361 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID);
2362 assert(id->is_static_field_id(), "invalid static field id");
2363 // Keep JVMTI addition small and only check enabled flag here.
2364 // jni_SetField_probe() assumes that is okay to create handles.
2365 if (JvmtiExport::should_post_field_modification()) {
2366 jvalue field_value;
2367 field_value.l = value;
2368 JvmtiExport::jni_SetField_probe(thread, NULL, NULL, id->holder(), fieldID, true, 'L', (jvalue *)&field_value);
2369 }
2370 id->holder()->java_mirror()->obj_field_put(id->offset(), JNIHandles::resolve(value));
2371 HOTSPOT_JNI_SETSTATICOBJECTFIELD_RETURN();
2372 JNI_END
2373
2374
2375
2376 #define DEFINE_SETSTATICFIELD(Argument,Fieldname,Result,SigType,unionType \
2377 , EntryProbe, ReturnProbe) \
2378 \
2379 JNI_ENTRY(void, jni_SetStatic##Result##Field(JNIEnv *env, jclass clazz, jfieldID fieldID, Argument value)) \
2380 JNIWrapper("SetStatic" XSTR(Result) "Field"); \
2381 EntryProbe; \
2382 \
2383 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID); \
2384 assert(id->is_static_field_id(), "invalid static field id"); \
2385 /* Keep JVMTI addition small and only check enabled flag here. */ \
2386 /* jni_SetField_probe() assumes that is okay to create handles. */ \
2387 if (JvmtiExport::should_post_field_modification()) { \
2388 jvalue field_value; \
2389 field_value.unionType = value; \
2390 JvmtiExport::jni_SetField_probe(thread, NULL, NULL, id->holder(), fieldID, true, SigType, (jvalue *)&field_value); \
2391 } \
2392 id->holder()->java_mirror()-> Fieldname##_field_put (id->offset(), value); \
2393 ReturnProbe;\
2394 JNI_END
2395
2396 DEFINE_SETSTATICFIELD(jboolean, bool, Boolean, 'Z', z
2397 , HOTSPOT_JNI_SETSTATICBOOLEANFIELD_ENTRY(env, clazz, (uintptr_t)fieldID, value),
2398 HOTSPOT_JNI_SETSTATICBOOLEANFIELD_RETURN())
2399 DEFINE_SETSTATICFIELD(jbyte, byte, Byte, 'B', b
2400 , HOTSPOT_JNI_SETSTATICBYTEFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value),
2401 HOTSPOT_JNI_SETSTATICBYTEFIELD_RETURN())
2402 DEFINE_SETSTATICFIELD(jchar, char, Char, 'C', c
2403 , HOTSPOT_JNI_SETSTATICCHARFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value),
2404 HOTSPOT_JNI_SETSTATICCHARFIELD_RETURN())
2405 DEFINE_SETSTATICFIELD(jshort, short, Short, 'S', s
2406 , HOTSPOT_JNI_SETSTATICSHORTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value),
2407 HOTSPOT_JNI_SETSTATICSHORTFIELD_RETURN())
2408 DEFINE_SETSTATICFIELD(jint, int, Int, 'I', i
2409 , HOTSPOT_JNI_SETSTATICINTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value),
2410 HOTSPOT_JNI_SETSTATICINTFIELD_RETURN())
2411 DEFINE_SETSTATICFIELD(jlong, long, Long, 'J', j
2412 , HOTSPOT_JNI_SETSTATICLONGFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value),
2413 HOTSPOT_JNI_SETSTATICLONGFIELD_RETURN())
2414 // Float and double probes don't return value because dtrace doesn't currently support it
2415 DEFINE_SETSTATICFIELD(jfloat, float, Float, 'F', f
2416 , HOTSPOT_JNI_SETSTATICFLOATFIELD_ENTRY(env, clazz, (uintptr_t) fieldID),
2417 HOTSPOT_JNI_SETSTATICFLOATFIELD_RETURN())
2418 DEFINE_SETSTATICFIELD(jdouble, double, Double, 'D', d
2419 , HOTSPOT_JNI_SETSTATICDOUBLEFIELD_ENTRY(env, clazz, (uintptr_t) fieldID),
2420 HOTSPOT_JNI_SETSTATICDOUBLEFIELD_RETURN())
2421
2422 //
2423 // String Operations
2424 //
2425
2426 // Unicode Interface
2427
2428 DT_RETURN_MARK_DECL(NewString, jstring
2429 , HOTSPOT_JNI_NEWSTRING_RETURN(_ret_ref));
2430
2431 JNI_ENTRY(jstring, jni_NewString(JNIEnv *env, const jchar *unicodeChars, jsize len))
2432 JNIWrapper("NewString");
2433 HOTSPOT_JNI_NEWSTRING_ENTRY(env, (uint16_t *) unicodeChars, len);
2434 jstring ret = NULL;
2435 DT_RETURN_MARK(NewString, jstring, (const jstring&)ret);
2436 oop string=java_lang_String::create_oop_from_unicode((jchar*) unicodeChars, len, CHECK_NULL);
2437 ret = (jstring) JNIHandles::make_local(env, string);
2438 return ret;
2439 JNI_END
2440
2441
2442 JNI_QUICK_ENTRY(jsize, jni_GetStringLength(JNIEnv *env, jstring string))
2443 JNIWrapper("GetStringLength");
2444 HOTSPOT_JNI_GETSTRINGLENGTH_ENTRY(env, string);
2445 jsize ret = 0;
2446 oop s = JNIHandles::resolve_non_null(string);
2447 if (java_lang_String::value(s) != NULL) {
2448 ret = java_lang_String::length(s);
2449 }
2450 HOTSPOT_JNI_GETSTRINGLENGTH_RETURN(ret);
2451 return ret;
2452 JNI_END
2453
2454
2455 JNI_QUICK_ENTRY(const jchar*, jni_GetStringChars(
2456 JNIEnv *env, jstring string, jboolean *isCopy))
2457 JNIWrapper("GetStringChars");
2458 HOTSPOT_JNI_GETSTRINGCHARS_ENTRY(env, string, (uintptr_t *) isCopy);
2459 jchar* buf = NULL;
2460 oop s = JNIHandles::resolve_non_null(string);
2461 typeArrayOop s_value = java_lang_String::value(s);
2462 if (s_value != NULL) {
2463 int s_len = java_lang_String::length(s);
2464 bool is_latin1 = java_lang_String::is_latin1(s);
2465 buf = NEW_C_HEAP_ARRAY_RETURN_NULL(jchar, s_len + 1, mtInternal); // add one for zero termination
2466 /* JNI Specification states return NULL on OOM */
2467 if (buf != NULL) {
2468 if (s_len > 0) {
2469 if (!is_latin1) {
2470 memcpy(buf, s_value->char_at_addr(0), sizeof(jchar)*s_len);
2471 } else {
2472 for (int i = 0; i < s_len; i++) {
2473 buf[i] = ((jchar) s_value->byte_at(i)) & 0xff;
2474 }
2475 }
2476 }
2477 buf[s_len] = 0;
2478 //%note jni_5
2479 if (isCopy != NULL) {
2480 *isCopy = JNI_TRUE;
2481 }
2482 }
2483 }
2484 HOTSPOT_JNI_GETSTRINGCHARS_RETURN(buf);
2485 return buf;
2486 JNI_END
2487
2488
2489 JNI_QUICK_ENTRY(void, jni_ReleaseStringChars(JNIEnv *env, jstring str, const jchar *chars))
2490 JNIWrapper("ReleaseStringChars");
2491 HOTSPOT_JNI_RELEASESTRINGCHARS_ENTRY(env, str, (uint16_t *) chars);
2492 //%note jni_6
2493 if (chars != NULL) {
2494 // Since String objects are supposed to be immutable, don't copy any
2495 // new data back. A bad user will have to go after the char array.
2496 FreeHeap((void*) chars);
2497 }
2498 HOTSPOT_JNI_RELEASESTRINGCHARS_RETURN();
2499 JNI_END
2500
2501
2502 // UTF Interface
2503
2504 DT_RETURN_MARK_DECL(NewStringUTF, jstring
2505 , HOTSPOT_JNI_NEWSTRINGUTF_RETURN(_ret_ref));
2506
2507 JNI_ENTRY(jstring, jni_NewStringUTF(JNIEnv *env, const char *bytes))
2508 JNIWrapper("NewStringUTF");
2509 HOTSPOT_JNI_NEWSTRINGUTF_ENTRY(env, (char *) bytes);
2510 jstring ret;
2511 DT_RETURN_MARK(NewStringUTF, jstring, (const jstring&)ret);
2512
2513 oop result = java_lang_String::create_oop_from_str((char*) bytes, CHECK_NULL);
2514 ret = (jstring) JNIHandles::make_local(env, result);
2515 return ret;
2516 JNI_END
2517
2518
2519 JNI_ENTRY(jsize, jni_GetStringUTFLength(JNIEnv *env, jstring string))
2520 JNIWrapper("GetStringUTFLength");
2521 HOTSPOT_JNI_GETSTRINGUTFLENGTH_ENTRY(env, string);
2522 jsize ret = 0;
2523 oop java_string = JNIHandles::resolve_non_null(string);
2524 if (java_lang_String::value(java_string) != NULL) {
2525 ret = java_lang_String::utf8_length(java_string);
2526 }
2527 HOTSPOT_JNI_GETSTRINGUTFLENGTH_RETURN(ret);
2528 return ret;
2529 JNI_END
2530
2531
2532 JNI_ENTRY(const char*, jni_GetStringUTFChars(JNIEnv *env, jstring string, jboolean *isCopy))
2533 JNIWrapper("GetStringUTFChars");
2534 HOTSPOT_JNI_GETSTRINGUTFCHARS_ENTRY(env, string, (uintptr_t *) isCopy);
2535 char* result = NULL;
2536 oop java_string = JNIHandles::resolve_non_null(string);
2537 if (java_lang_String::value(java_string) != NULL) {
2538 size_t length = java_lang_String::utf8_length(java_string);
2539 /* JNI Specification states return NULL on OOM */
2540 result = AllocateHeap(length + 1, mtInternal, 0, AllocFailStrategy::RETURN_NULL);
2541 if (result != NULL) {
2542 java_lang_String::as_utf8_string(java_string, result, (int) length + 1);
2543 if (isCopy != NULL) {
2544 *isCopy = JNI_TRUE;
2545 }
2546 }
2547 }
2548 HOTSPOT_JNI_GETSTRINGUTFCHARS_RETURN(result);
2549 return result;
2550 JNI_END
2551
2552
2553 JNI_LEAF(void, jni_ReleaseStringUTFChars(JNIEnv *env, jstring str, const char *chars))
2554 JNIWrapper("ReleaseStringUTFChars");
2555 HOTSPOT_JNI_RELEASESTRINGUTFCHARS_ENTRY(env, str, (char *) chars);
2556 if (chars != NULL) {
2557 FreeHeap((char*) chars);
2558 }
2559 HOTSPOT_JNI_RELEASESTRINGUTFCHARS_RETURN();
2560 JNI_END
2561
2562
2563 JNI_QUICK_ENTRY(jsize, jni_GetArrayLength(JNIEnv *env, jarray array))
2564 JNIWrapper("GetArrayLength");
2565 HOTSPOT_JNI_GETARRAYLENGTH_ENTRY(env, array);
2566 arrayOop a = arrayOop(JNIHandles::resolve_non_null(array));
2567 assert(a->is_array(), "must be array");
2568 jsize ret = a->length();
2569 HOTSPOT_JNI_GETARRAYLENGTH_RETURN(ret);
2570 return ret;
2571 JNI_END
2572
2573
2574 //
2575 // Object Array Operations
2576 //
2577
2578 DT_RETURN_MARK_DECL(NewObjectArray, jobjectArray
2579 , HOTSPOT_JNI_NEWOBJECTARRAY_RETURN(_ret_ref));
2580
2581 JNI_ENTRY(jobjectArray, jni_NewObjectArray(JNIEnv *env, jsize length, jclass elementClass, jobject initialElement))
2582 JNIWrapper("NewObjectArray");
2583 HOTSPOT_JNI_NEWOBJECTARRAY_ENTRY(env, length, elementClass, initialElement);
2584 jobjectArray ret = NULL;
2585 DT_RETURN_MARK(NewObjectArray, jobjectArray, (const jobjectArray&)ret);
2586 KlassHandle ek(THREAD, java_lang_Class::as_Klass(JNIHandles::resolve_non_null(elementClass)));
2587 Klass* ako = ek()->array_klass(CHECK_NULL);
2588 KlassHandle ak = KlassHandle(THREAD, ako);
2589 ObjArrayKlass::cast(ak())->initialize(CHECK_NULL);
2590 objArrayOop result = ObjArrayKlass::cast(ak())->allocate(length, CHECK_NULL);
2591 oop initial_value = JNIHandles::resolve(initialElement);
2592 if (initial_value != NULL) { // array already initialized with NULL
2593 for (int index = 0; index < length; index++) {
2594 result->obj_at_put(index, initial_value);
2595 }
2596 }
2597 ret = (jobjectArray) JNIHandles::make_local(env, result);
2598 return ret;
2599 JNI_END
2600
2601 DT_RETURN_MARK_DECL(GetObjectArrayElement, jobject
2602 , HOTSPOT_JNI_GETOBJECTARRAYELEMENT_RETURN(_ret_ref));
2603
2604 JNI_ENTRY(jobject, jni_GetObjectArrayElement(JNIEnv *env, jobjectArray array, jsize index))
2605 JNIWrapper("GetObjectArrayElement");
2606 HOTSPOT_JNI_GETOBJECTARRAYELEMENT_ENTRY(env, array, index);
2607 jobject ret = NULL;
2608 DT_RETURN_MARK(GetObjectArrayElement, jobject, (const jobject&)ret);
2609 objArrayOop a = objArrayOop(JNIHandles::resolve_non_null(array));
2610 if (a->is_within_bounds(index)) {
2611 ret = JNIHandles::make_local(env, a->obj_at(index));
2612 return ret;
2613 } else {
2614 char buf[jintAsStringSize];
2615 sprintf(buf, "%d", index);
2616 THROW_MSG_0(vmSymbols::java_lang_ArrayIndexOutOfBoundsException(), buf);
2617 }
2618 JNI_END
2619
2620 DT_VOID_RETURN_MARK_DECL(SetObjectArrayElement
2621 , HOTSPOT_JNI_SETOBJECTARRAYELEMENT_RETURN());
2622
2623 JNI_ENTRY(void, jni_SetObjectArrayElement(JNIEnv *env, jobjectArray array, jsize index, jobject value))
2624 JNIWrapper("SetObjectArrayElement");
2625 HOTSPOT_JNI_SETOBJECTARRAYELEMENT_ENTRY(env, array, index, value);
2626 DT_VOID_RETURN_MARK(SetObjectArrayElement);
2627
2628 objArrayOop a = objArrayOop(JNIHandles::resolve_non_null(array));
2629 oop v = JNIHandles::resolve(value);
2630 if (a->is_within_bounds(index)) {
2631 if (v == NULL || v->is_a(ObjArrayKlass::cast(a->klass())->element_klass())) {
2632 a->obj_at_put(index, v);
2633 } else {
2634 THROW(vmSymbols::java_lang_ArrayStoreException());
2635 }
2636 } else {
2637 char buf[jintAsStringSize];
2638 sprintf(buf, "%d", index);
2639 THROW_MSG(vmSymbols::java_lang_ArrayIndexOutOfBoundsException(), buf);
2640 }
2641 JNI_END
2642
2643
2644
2645 #define DEFINE_NEWSCALARARRAY(Return,Allocator,Result \
2646 ,EntryProbe,ReturnProbe) \
2647 \
2648 DT_RETURN_MARK_DECL(New##Result##Array, Return \
2649 , ReturnProbe); \
2650 \
2651 JNI_ENTRY(Return, \
2652 jni_New##Result##Array(JNIEnv *env, jsize len)) \
2653 JNIWrapper("New" XSTR(Result) "Array"); \
2654 EntryProbe; \
2655 Return ret = NULL;\
2656 DT_RETURN_MARK(New##Result##Array, Return, (const Return&)ret);\
2657 \
2658 oop obj= oopFactory::Allocator(len, CHECK_0); \
2659 ret = (Return) JNIHandles::make_local(env, obj); \
2660 return ret;\
2661 JNI_END
2662
2663 DEFINE_NEWSCALARARRAY(jbooleanArray, new_boolArray, Boolean,
2664 HOTSPOT_JNI_NEWBOOLEANARRAY_ENTRY(env, len),
2665 HOTSPOT_JNI_NEWBOOLEANARRAY_RETURN(_ret_ref))
2666 DEFINE_NEWSCALARARRAY(jbyteArray, new_byteArray, Byte,
2667 HOTSPOT_JNI_NEWBYTEARRAY_ENTRY(env, len),
2668 HOTSPOT_JNI_NEWBYTEARRAY_RETURN(_ret_ref))
2669 DEFINE_NEWSCALARARRAY(jshortArray, new_shortArray, Short,
2670 HOTSPOT_JNI_NEWSHORTARRAY_ENTRY(env, len),
2671 HOTSPOT_JNI_NEWSHORTARRAY_RETURN(_ret_ref))
2672 DEFINE_NEWSCALARARRAY(jcharArray, new_charArray, Char,
2673 HOTSPOT_JNI_NEWCHARARRAY_ENTRY(env, len),
2674 HOTSPOT_JNI_NEWCHARARRAY_RETURN(_ret_ref))
2675 DEFINE_NEWSCALARARRAY(jintArray, new_intArray, Int,
2676 HOTSPOT_JNI_NEWINTARRAY_ENTRY(env, len),
2677 HOTSPOT_JNI_NEWINTARRAY_RETURN(_ret_ref))
2678 DEFINE_NEWSCALARARRAY(jlongArray, new_longArray, Long,
2679 HOTSPOT_JNI_NEWLONGARRAY_ENTRY(env, len),
2680 HOTSPOT_JNI_NEWLONGARRAY_RETURN(_ret_ref))
2681 DEFINE_NEWSCALARARRAY(jfloatArray, new_singleArray, Float,
2682 HOTSPOT_JNI_NEWFLOATARRAY_ENTRY(env, len),
2683 HOTSPOT_JNI_NEWFLOATARRAY_RETURN(_ret_ref))
2684 DEFINE_NEWSCALARARRAY(jdoubleArray, new_doubleArray, Double,
2685 HOTSPOT_JNI_NEWDOUBLEARRAY_ENTRY(env, len),
2686 HOTSPOT_JNI_NEWDOUBLEARRAY_RETURN(_ret_ref))
2687
2688 // Return an address which will fault if the caller writes to it.
2689
2690 static char* get_bad_address() {
2691 static char* bad_address = NULL;
2692 if (bad_address == NULL) {
2693 size_t size = os::vm_allocation_granularity();
2694 bad_address = os::reserve_memory(size);
2695 if (bad_address != NULL) {
2696 os::protect_memory(bad_address, size, os::MEM_PROT_READ,
2697 /*is_committed*/false);
2698 MemTracker::record_virtual_memory_type((void*)bad_address, mtInternal);
2699 }
2700 }
2701 return bad_address;
2702 }
2703
2704
2705
2706 #define DEFINE_GETSCALARARRAYELEMENTS(ElementTag,ElementType,Result, Tag \
2707 , EntryProbe, ReturnProbe) \
2708 \
2709 JNI_QUICK_ENTRY(ElementType*, \
2710 jni_Get##Result##ArrayElements(JNIEnv *env, ElementType##Array array, jboolean *isCopy)) \
2711 JNIWrapper("Get" XSTR(Result) "ArrayElements"); \
2712 EntryProbe; \
2713 /* allocate an chunk of memory in c land */ \
2714 typeArrayOop a = typeArrayOop(JNIHandles::resolve_non_null(array)); \
2715 ElementType* result; \
2716 int len = a->length(); \
2717 if (len == 0) { \
2718 /* Empty array: legal but useless, can't return NULL. \
2719 * Return a pointer to something useless. \
2720 * Avoid asserts in typeArrayOop. */ \
2721 result = (ElementType*)get_bad_address(); \
2722 } else { \
2723 /* JNI Specification states return NULL on OOM */ \
2724 result = NEW_C_HEAP_ARRAY_RETURN_NULL(ElementType, len, mtInternal); \
2725 if (result != NULL) { \
2726 /* copy the array to the c chunk */ \
2727 memcpy(result, a->Tag##_at_addr(0), sizeof(ElementType)*len); \
2728 if (isCopy) { \
2729 *isCopy = JNI_TRUE; \
2730 } \
2731 } \
2732 } \
2733 ReturnProbe; \
2734 return result; \
2735 JNI_END
2736
2737 DEFINE_GETSCALARARRAYELEMENTS(T_BOOLEAN, jboolean, Boolean, bool
2738 , HOTSPOT_JNI_GETBOOLEANARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy),
2739 HOTSPOT_JNI_GETBOOLEANARRAYELEMENTS_RETURN((uintptr_t*)result))
2740 DEFINE_GETSCALARARRAYELEMENTS(T_BYTE, jbyte, Byte, byte
2741 , HOTSPOT_JNI_GETBYTEARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy),
2742 HOTSPOT_JNI_GETBYTEARRAYELEMENTS_RETURN((char*)result))
2743 DEFINE_GETSCALARARRAYELEMENTS(T_SHORT, jshort, Short, short
2744 , HOTSPOT_JNI_GETSHORTARRAYELEMENTS_ENTRY(env, (uint16_t*) array, (uintptr_t *) isCopy),
2745 HOTSPOT_JNI_GETSHORTARRAYELEMENTS_RETURN((uint16_t*)result))
2746 DEFINE_GETSCALARARRAYELEMENTS(T_CHAR, jchar, Char, char
2747 , HOTSPOT_JNI_GETCHARARRAYELEMENTS_ENTRY(env, (uint16_t*) array, (uintptr_t *) isCopy),
2748 HOTSPOT_JNI_GETCHARARRAYELEMENTS_RETURN(result))
2749 DEFINE_GETSCALARARRAYELEMENTS(T_INT, jint, Int, int
2750 , HOTSPOT_JNI_GETINTARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy),
2751 HOTSPOT_JNI_GETINTARRAYELEMENTS_RETURN((uint32_t*)result))
2752 DEFINE_GETSCALARARRAYELEMENTS(T_LONG, jlong, Long, long
2753 , HOTSPOT_JNI_GETLONGARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy),
2754 HOTSPOT_JNI_GETLONGARRAYELEMENTS_RETURN(((uintptr_t*)result)))
2755 // Float and double probes don't return value because dtrace doesn't currently support it
2756 DEFINE_GETSCALARARRAYELEMENTS(T_FLOAT, jfloat, Float, float
2757 , HOTSPOT_JNI_GETFLOATARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy),
2758 HOTSPOT_JNI_GETFLOATARRAYELEMENTS_RETURN(result))
2759 DEFINE_GETSCALARARRAYELEMENTS(T_DOUBLE, jdouble, Double, double
2760 , HOTSPOT_JNI_GETDOUBLEARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy),
2761 HOTSPOT_JNI_GETDOUBLEARRAYELEMENTS_RETURN(result))
2762
2763
2764 #define DEFINE_RELEASESCALARARRAYELEMENTS(ElementTag,ElementType,Result,Tag \
2765 , EntryProbe, ReturnProbe);\
2766 \
2767 JNI_QUICK_ENTRY(void, \
2768 jni_Release##Result##ArrayElements(JNIEnv *env, ElementType##Array array, \
2769 ElementType *buf, jint mode)) \
2770 JNIWrapper("Release" XSTR(Result) "ArrayElements"); \
2771 EntryProbe; \
2772 typeArrayOop a = typeArrayOop(JNIHandles::resolve_non_null(array)); \
2773 int len = a->length(); \
2774 if (len != 0) { /* Empty array: nothing to free or copy. */ \
2775 if ((mode == 0) || (mode == JNI_COMMIT)) { \
2776 memcpy(a->Tag##_at_addr(0), buf, sizeof(ElementType)*len); \
2777 } \
2778 if ((mode == 0) || (mode == JNI_ABORT)) { \
2779 FreeHeap(buf); \
2780 } \
2781 } \
2782 ReturnProbe; \
2783 JNI_END
2784
2785 DEFINE_RELEASESCALARARRAYELEMENTS(T_BOOLEAN, jboolean, Boolean, bool
2786 , HOTSPOT_JNI_RELEASEBOOLEANARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) buf, mode),
2787 HOTSPOT_JNI_RELEASEBOOLEANARRAYELEMENTS_RETURN())
2788 DEFINE_RELEASESCALARARRAYELEMENTS(T_BYTE, jbyte, Byte, byte
2789 , HOTSPOT_JNI_RELEASEBYTEARRAYELEMENTS_ENTRY(env, array, (char *) buf, mode),
2790 HOTSPOT_JNI_RELEASEBYTEARRAYELEMENTS_RETURN())
2791 DEFINE_RELEASESCALARARRAYELEMENTS(T_SHORT, jshort, Short, short
2792 , HOTSPOT_JNI_RELEASESHORTARRAYELEMENTS_ENTRY(env, array, (uint16_t *) buf, mode),
2793 HOTSPOT_JNI_RELEASESHORTARRAYELEMENTS_RETURN())
2794 DEFINE_RELEASESCALARARRAYELEMENTS(T_CHAR, jchar, Char, char
2795 , HOTSPOT_JNI_RELEASECHARARRAYELEMENTS_ENTRY(env, array, (uint16_t *) buf, mode),
2796 HOTSPOT_JNI_RELEASECHARARRAYELEMENTS_RETURN())
2797 DEFINE_RELEASESCALARARRAYELEMENTS(T_INT, jint, Int, int
2798 , HOTSPOT_JNI_RELEASEINTARRAYELEMENTS_ENTRY(env, array, (uint32_t *) buf, mode),
2799 HOTSPOT_JNI_RELEASEINTARRAYELEMENTS_RETURN())
2800 DEFINE_RELEASESCALARARRAYELEMENTS(T_LONG, jlong, Long, long
2801 , HOTSPOT_JNI_RELEASELONGARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) buf, mode),
2802 HOTSPOT_JNI_RELEASELONGARRAYELEMENTS_RETURN())
2803 DEFINE_RELEASESCALARARRAYELEMENTS(T_FLOAT, jfloat, Float, float
2804 , HOTSPOT_JNI_RELEASEFLOATARRAYELEMENTS_ENTRY(env, array, (float *) buf, mode),
2805 HOTSPOT_JNI_RELEASEFLOATARRAYELEMENTS_RETURN())
2806 DEFINE_RELEASESCALARARRAYELEMENTS(T_DOUBLE, jdouble, Double, double
2807 , HOTSPOT_JNI_RELEASEDOUBLEARRAYELEMENTS_ENTRY(env, array, (double *) buf, mode),
2808 HOTSPOT_JNI_RELEASEDOUBLEARRAYELEMENTS_RETURN())
2809
2810
2811 #define DEFINE_GETSCALARARRAYREGION(ElementTag,ElementType,Result, Tag \
2812 , EntryProbe, ReturnProbe); \
2813 DT_VOID_RETURN_MARK_DECL(Get##Result##ArrayRegion \
2814 , ReturnProbe); \
2815 \
2816 JNI_ENTRY(void, \
2817 jni_Get##Result##ArrayRegion(JNIEnv *env, ElementType##Array array, jsize start, \
2818 jsize len, ElementType *buf)) \
2819 JNIWrapper("Get" XSTR(Result) "ArrayRegion"); \
2820 EntryProbe; \
2821 DT_VOID_RETURN_MARK(Get##Result##ArrayRegion); \
2822 typeArrayOop src = typeArrayOop(JNIHandles::resolve_non_null(array)); \
2823 if (start < 0 || len < 0 || ((unsigned int)start + (unsigned int)len > (unsigned int)src->length())) { \
2824 THROW(vmSymbols::java_lang_ArrayIndexOutOfBoundsException()); \
2825 } else { \
2826 if (len > 0) { \
2827 int sc = TypeArrayKlass::cast(src->klass())->log2_element_size(); \
2828 memcpy((u_char*) buf, \
2829 (u_char*) src->Tag##_at_addr(start), \
2830 len << sc); \
2831 } \
2832 } \
2833 JNI_END
2834
2835 DEFINE_GETSCALARARRAYREGION(T_BOOLEAN, jboolean,Boolean, bool
2836 , HOTSPOT_JNI_GETBOOLEANARRAYREGION_ENTRY(env, array, start, len, (uintptr_t *) buf),
2837 HOTSPOT_JNI_GETBOOLEANARRAYREGION_RETURN());
2838 DEFINE_GETSCALARARRAYREGION(T_BYTE, jbyte, Byte, byte
2839 , HOTSPOT_JNI_GETBYTEARRAYREGION_ENTRY(env, array, start, len, (char *) buf),
2840 HOTSPOT_JNI_GETBYTEARRAYREGION_RETURN());
2841 DEFINE_GETSCALARARRAYREGION(T_SHORT, jshort, Short, short
2842 , HOTSPOT_JNI_GETSHORTARRAYREGION_ENTRY(env, array, start, len, (uint16_t *) buf),
2843 HOTSPOT_JNI_GETSHORTARRAYREGION_RETURN());
2844 DEFINE_GETSCALARARRAYREGION(T_CHAR, jchar, Char, char
2845 , HOTSPOT_JNI_GETCHARARRAYREGION_ENTRY(env, array, start, len, (uint16_t*) buf),
2846 HOTSPOT_JNI_GETCHARARRAYREGION_RETURN());
2847 DEFINE_GETSCALARARRAYREGION(T_INT, jint, Int, int
2848 , HOTSPOT_JNI_GETINTARRAYREGION_ENTRY(env, array, start, len, (uint32_t*) buf),
2849 HOTSPOT_JNI_GETINTARRAYREGION_RETURN());
2850 DEFINE_GETSCALARARRAYREGION(T_LONG, jlong, Long, long
2851 , HOTSPOT_JNI_GETLONGARRAYREGION_ENTRY(env, array, start, len, (uintptr_t *) buf),
2852 HOTSPOT_JNI_GETLONGARRAYREGION_RETURN());
2853 DEFINE_GETSCALARARRAYREGION(T_FLOAT, jfloat, Float, float
2854 , HOTSPOT_JNI_GETFLOATARRAYREGION_ENTRY(env, array, start, len, (float *) buf),
2855 HOTSPOT_JNI_GETFLOATARRAYREGION_RETURN());
2856 DEFINE_GETSCALARARRAYREGION(T_DOUBLE, jdouble, Double, double
2857 , HOTSPOT_JNI_GETDOUBLEARRAYREGION_ENTRY(env, array, start, len, (double *) buf),
2858 HOTSPOT_JNI_GETDOUBLEARRAYREGION_RETURN());
2859
2860
2861 #define DEFINE_SETSCALARARRAYREGION(ElementTag,ElementType,Result, Tag \
2862 , EntryProbe, ReturnProbe); \
2863 DT_VOID_RETURN_MARK_DECL(Set##Result##ArrayRegion \
2864 ,ReturnProbe); \
2865 \
2866 JNI_ENTRY(void, \
2867 jni_Set##Result##ArrayRegion(JNIEnv *env, ElementType##Array array, jsize start, \
2868 jsize len, const ElementType *buf)) \
2869 JNIWrapper("Set" XSTR(Result) "ArrayRegion"); \
2870 EntryProbe; \
2871 DT_VOID_RETURN_MARK(Set##Result##ArrayRegion); \
2872 typeArrayOop dst = typeArrayOop(JNIHandles::resolve_non_null(array)); \
2873 if (start < 0 || len < 0 || ((unsigned int)start + (unsigned int)len > (unsigned int)dst->length())) { \
2874 THROW(vmSymbols::java_lang_ArrayIndexOutOfBoundsException()); \
2875 } else { \
2876 if (len > 0) { \
2877 int sc = TypeArrayKlass::cast(dst->klass())->log2_element_size(); \
2878 memcpy((u_char*) dst->Tag##_at_addr(start), \
2879 (u_char*) buf, \
2880 len << sc); \
2881 } \
2882 } \
2883 JNI_END
2884
2885 DEFINE_SETSCALARARRAYREGION(T_BOOLEAN, jboolean, Boolean, bool
2886 , HOTSPOT_JNI_SETBOOLEANARRAYREGION_ENTRY(env, array, start, len, (uintptr_t *)buf),
2887 HOTSPOT_JNI_SETBOOLEANARRAYREGION_RETURN())
2888 DEFINE_SETSCALARARRAYREGION(T_BYTE, jbyte, Byte, byte
2889 , HOTSPOT_JNI_SETBYTEARRAYREGION_ENTRY(env, array, start, len, (char *) buf),
2890 HOTSPOT_JNI_SETBYTEARRAYREGION_RETURN())
2891 DEFINE_SETSCALARARRAYREGION(T_SHORT, jshort, Short, short
2892 , HOTSPOT_JNI_SETSHORTARRAYREGION_ENTRY(env, array, start, len, (uint16_t *) buf),
2893 HOTSPOT_JNI_SETSHORTARRAYREGION_RETURN())
2894 DEFINE_SETSCALARARRAYREGION(T_CHAR, jchar, Char, char
2895 , HOTSPOT_JNI_SETCHARARRAYREGION_ENTRY(env, array, start, len, (uint16_t *) buf),
2896 HOTSPOT_JNI_SETCHARARRAYREGION_RETURN())
2897 DEFINE_SETSCALARARRAYREGION(T_INT, jint, Int, int
2898 , HOTSPOT_JNI_SETINTARRAYREGION_ENTRY(env, array, start, len, (uint32_t *) buf),
2899 HOTSPOT_JNI_SETINTARRAYREGION_RETURN())
2900 DEFINE_SETSCALARARRAYREGION(T_LONG, jlong, Long, long
2901 , HOTSPOT_JNI_SETLONGARRAYREGION_ENTRY(env, array, start, len, (uintptr_t *) buf),
2902 HOTSPOT_JNI_SETLONGARRAYREGION_RETURN())
2903 DEFINE_SETSCALARARRAYREGION(T_FLOAT, jfloat, Float, float
2904 , HOTSPOT_JNI_SETFLOATARRAYREGION_ENTRY(env, array, start, len, (float *) buf),
2905 HOTSPOT_JNI_SETFLOATARRAYREGION_RETURN())
2906 DEFINE_SETSCALARARRAYREGION(T_DOUBLE, jdouble, Double, double
2907 , HOTSPOT_JNI_SETDOUBLEARRAYREGION_ENTRY(env, array, start, len, (double *) buf),
2908 HOTSPOT_JNI_SETDOUBLEARRAYREGION_RETURN())
2909
2910
2911 //
2912 // Interception of natives
2913 //
2914
2915 // The RegisterNatives call being attempted tried to register with a method that
2916 // is not native. Ask JVM TI what prefixes have been specified. Then check
2917 // to see if the native method is now wrapped with the prefixes. See the
2918 // SetNativeMethodPrefix(es) functions in the JVM TI Spec for details.
2919 static Method* find_prefixed_native(KlassHandle k,
2920 Symbol* name, Symbol* signature, TRAPS) {
2921 #if INCLUDE_JVMTI
2922 ResourceMark rm(THREAD);
2923 Method* method;
2924 int name_len = name->utf8_length();
2925 char* name_str = name->as_utf8();
2926 int prefix_count;
2927 char** prefixes = JvmtiExport::get_all_native_method_prefixes(&prefix_count);
2928 for (int i = 0; i < prefix_count; i++) {
2929 char* prefix = prefixes[i];
2930 int prefix_len = (int)strlen(prefix);
2931
2932 // try adding this prefix to the method name and see if it matches another method name
2933 int trial_len = name_len + prefix_len;
2934 char* trial_name_str = NEW_RESOURCE_ARRAY(char, trial_len + 1);
2935 strcpy(trial_name_str, prefix);
2936 strcat(trial_name_str, name_str);
2937 TempNewSymbol trial_name = SymbolTable::probe(trial_name_str, trial_len);
2938 if (trial_name == NULL) {
2939 continue; // no such symbol, so this prefix wasn't used, try the next prefix
2940 }
2941 method = k()->lookup_method(trial_name, signature);
2942 if (method == NULL) {
2943 continue; // signature doesn't match, try the next prefix
2944 }
2945 if (method->is_native()) {
2946 method->set_is_prefixed_native();
2947 return method; // wahoo, we found a prefixed version of the method, return it
2948 }
2949 // found as non-native, so prefix is good, add it, probably just need more prefixes
2950 name_len = trial_len;
2951 name_str = trial_name_str;
2952 }
2953 #endif // INCLUDE_JVMTI
2954 return NULL; // not found
2955 }
2956
2957 static bool register_native(KlassHandle k, Symbol* name, Symbol* signature, address entry, TRAPS) {
2958 Method* method = k()->lookup_method(name, signature);
2959 if (method == NULL) {
2960 ResourceMark rm;
2961 stringStream st;
2962 st.print("Method %s name or signature does not match",
2963 Method::name_and_sig_as_C_string(k(), name, signature));
2964 THROW_MSG_(vmSymbols::java_lang_NoSuchMethodError(), st.as_string(), false);
2965 }
2966 if (!method->is_native()) {
2967 // trying to register to a non-native method, see if a JVM TI agent has added prefix(es)
2968 method = find_prefixed_native(k, name, signature, THREAD);
2969 if (method == NULL) {
2970 ResourceMark rm;
2971 stringStream st;
2972 st.print("Method %s is not declared as native",
2973 Method::name_and_sig_as_C_string(k(), name, signature));
2974 THROW_MSG_(vmSymbols::java_lang_NoSuchMethodError(), st.as_string(), false);
2975 }
2976 }
2977
2978 if (entry != NULL) {
2979 method->set_native_function(entry,
2980 Method::native_bind_event_is_interesting);
2981 } else {
2982 method->clear_native_function();
2983 }
2984 if (PrintJNIResolving) {
2985 ResourceMark rm(THREAD);
2986 tty->print_cr("[Registering JNI native method %s.%s]",
2987 method->method_holder()->external_name(),
2988 method->name()->as_C_string());
2989 }
2990 return true;
2991 }
2992
2993 DT_RETURN_MARK_DECL(RegisterNatives, jint
2994 , HOTSPOT_JNI_REGISTERNATIVES_RETURN(_ret_ref));
2995
2996 JNI_ENTRY(jint, jni_RegisterNatives(JNIEnv *env, jclass clazz,
2997 const JNINativeMethod *methods,
2998 jint nMethods))
2999 JNIWrapper("RegisterNatives");
3000 HOTSPOT_JNI_REGISTERNATIVES_ENTRY(env, clazz, (void *) methods, nMethods);
3001 jint ret = 0;
3002 DT_RETURN_MARK(RegisterNatives, jint, (const jint&)ret);
3003
3004 KlassHandle h_k(thread, java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz)));
3005
3006 for (int index = 0; index < nMethods; index++) {
3007 const char* meth_name = methods[index].name;
3008 const char* meth_sig = methods[index].signature;
3009 int meth_name_len = (int)strlen(meth_name);
3010
3011 // The class should have been loaded (we have an instance of the class
3012 // passed in) so the method and signature should already be in the symbol
3013 // table. If they're not there, the method doesn't exist.
3014 TempNewSymbol name = SymbolTable::probe(meth_name, meth_name_len);
3015 TempNewSymbol signature = SymbolTable::probe(meth_sig, (int)strlen(meth_sig));
3016
3017 if (name == NULL || signature == NULL) {
3018 ResourceMark rm;
3019 stringStream st;
3020 st.print("Method %s.%s%s not found", h_k()->external_name(), meth_name, meth_sig);
3021 // Must return negative value on failure
3022 THROW_MSG_(vmSymbols::java_lang_NoSuchMethodError(), st.as_string(), -1);
3023 }
3024
3025 bool res = register_native(h_k, name, signature,
3026 (address) methods[index].fnPtr, THREAD);
3027 if (!res) {
3028 ret = -1;
3029 break;
3030 }
3031 }
3032 return ret;
3033 JNI_END
3034
3035
3036 JNI_ENTRY(jint, jni_UnregisterNatives(JNIEnv *env, jclass clazz))
3037 JNIWrapper("UnregisterNatives");
3038 HOTSPOT_JNI_UNREGISTERNATIVES_ENTRY(env, clazz);
3039 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz));
3040 //%note jni_2
3041 if (k->is_instance_klass()) {
3042 for (int index = 0; index < InstanceKlass::cast(k)->methods()->length(); index++) {
3043 Method* m = InstanceKlass::cast(k)->methods()->at(index);
3044 if (m->is_native()) {
3045 m->clear_native_function();
3046 m->set_signature_handler(NULL);
3047 }
3048 }
3049 }
3050 HOTSPOT_JNI_UNREGISTERNATIVES_RETURN(0);
3051 return 0;
3052 JNI_END
3053
3054 //
3055 // Monitor functions
3056 //
3057
3058 DT_RETURN_MARK_DECL(MonitorEnter, jint
3059 , HOTSPOT_JNI_MONITORENTER_RETURN(_ret_ref));
3060
3061 JNI_ENTRY(jint, jni_MonitorEnter(JNIEnv *env, jobject jobj))
3062 HOTSPOT_JNI_MONITORENTER_ENTRY(env, jobj);
3063 jint ret = JNI_ERR;
3064 DT_RETURN_MARK(MonitorEnter, jint, (const jint&)ret);
3065
3066 // If the object is null, we can't do anything with it
3067 if (jobj == NULL) {
3068 THROW_(vmSymbols::java_lang_NullPointerException(), JNI_ERR);
3069 }
3070
3071 Handle obj(thread, JNIHandles::resolve_non_null(jobj));
3072 ObjectSynchronizer::jni_enter(obj, CHECK_(JNI_ERR));
3073 ret = JNI_OK;
3074 return ret;
3075 JNI_END
3076
3077 DT_RETURN_MARK_DECL(MonitorExit, jint
3078 , HOTSPOT_JNI_MONITOREXIT_RETURN(_ret_ref));
3079
3080 JNI_ENTRY(jint, jni_MonitorExit(JNIEnv *env, jobject jobj))
3081 HOTSPOT_JNI_MONITOREXIT_ENTRY(env, jobj);
3082 jint ret = JNI_ERR;
3083 DT_RETURN_MARK(MonitorExit, jint, (const jint&)ret);
3084
3085 // Don't do anything with a null object
3086 if (jobj == NULL) {
3087 THROW_(vmSymbols::java_lang_NullPointerException(), JNI_ERR);
3088 }
3089
3090 Handle obj(THREAD, JNIHandles::resolve_non_null(jobj));
3091 ObjectSynchronizer::jni_exit(obj(), CHECK_(JNI_ERR));
3092
3093 ret = JNI_OK;
3094 return ret;
3095 JNI_END
3096
3097 //
3098 // Extensions
3099 //
3100
3101 DT_VOID_RETURN_MARK_DECL(GetStringRegion
3102 , HOTSPOT_JNI_GETSTRINGREGION_RETURN());
3103
3104 JNI_ENTRY(void, jni_GetStringRegion(JNIEnv *env, jstring string, jsize start, jsize len, jchar *buf))
3105 JNIWrapper("GetStringRegion");
3106 HOTSPOT_JNI_GETSTRINGREGION_ENTRY(env, string, start, len, buf);
3107 DT_VOID_RETURN_MARK(GetStringRegion);
3108 oop s = JNIHandles::resolve_non_null(string);
3109 int s_len = java_lang_String::length(s);
3110 if (start < 0 || len < 0 || start + len > s_len) {
3111 THROW(vmSymbols::java_lang_StringIndexOutOfBoundsException());
3112 } else {
3113 if (len > 0) {
3114 typeArrayOop s_value = java_lang_String::value(s);
3115 bool is_latin1 = java_lang_String::is_latin1(s);
3116 if (!is_latin1) {
3117 memcpy(buf, s_value->char_at_addr(start), sizeof(jchar)*len);
3118 } else {
3119 for (int i = 0; i < len; i++) {
3120 buf[i] = ((jchar) s_value->byte_at(i + start)) & 0xff;
3121 }
3122 }
3123 }
3124 }
3125 JNI_END
3126
3127 DT_VOID_RETURN_MARK_DECL(GetStringUTFRegion
3128 , HOTSPOT_JNI_GETSTRINGUTFREGION_RETURN());
3129
3130 JNI_ENTRY(void, jni_GetStringUTFRegion(JNIEnv *env, jstring string, jsize start, jsize len, char *buf))
3131 JNIWrapper("GetStringUTFRegion");
3132 HOTSPOT_JNI_GETSTRINGUTFREGION_ENTRY(env, string, start, len, buf);
3133 DT_VOID_RETURN_MARK(GetStringUTFRegion);
3134 oop s = JNIHandles::resolve_non_null(string);
3135 int s_len = java_lang_String::length(s);
3136 if (start < 0 || len < 0 || start + len > s_len) {
3137 THROW(vmSymbols::java_lang_StringIndexOutOfBoundsException());
3138 } else {
3139 //%note jni_7
3140 if (len > 0) {
3141 // Assume the buffer is large enough as the JNI spec. does not require user error checking
3142 java_lang_String::as_utf8_string(s, start, len, buf, INT_MAX);
3143 // as_utf8_string null-terminates the result string
3144 } else {
3145 // JDK null-terminates the buffer even in len is zero
3146 if (buf != NULL) {
3147 buf[0] = 0;
3148 }
3149 }
3150 }
3151 JNI_END
3152
3153
3154 JNI_ENTRY(void*, jni_GetPrimitiveArrayCritical(JNIEnv *env, jarray array, jboolean *isCopy))
3155 JNIWrapper("GetPrimitiveArrayCritical");
3156 HOTSPOT_JNI_GETPRIMITIVEARRAYCRITICAL_ENTRY(env, array, (uintptr_t *) isCopy);
3157 GCLocker::lock_critical(thread);
3158 if (isCopy != NULL) {
3159 *isCopy = JNI_FALSE;
3160 }
3161 oop a = JNIHandles::resolve_non_null(array);
3162 assert(a->is_array(), "just checking");
3163 BasicType type;
3164 if (a->is_objArray()) {
3165 type = T_OBJECT;
3166 } else {
3167 type = TypeArrayKlass::cast(a->klass())->element_type();
3168 }
3169 void* ret = arrayOop(a)->base(type);
3170 HOTSPOT_JNI_GETPRIMITIVEARRAYCRITICAL_RETURN(ret);
3171 return ret;
3172 JNI_END
3173
3174
3175 JNI_ENTRY(void, jni_ReleasePrimitiveArrayCritical(JNIEnv *env, jarray array, void *carray, jint mode))
3176 JNIWrapper("ReleasePrimitiveArrayCritical");
3177 HOTSPOT_JNI_RELEASEPRIMITIVEARRAYCRITICAL_ENTRY(env, array, carray, mode);
3178 // The array, carray and mode arguments are ignored
3179 GCLocker::unlock_critical(thread);
3180 HOTSPOT_JNI_RELEASEPRIMITIVEARRAYCRITICAL_RETURN();
3181 JNI_END
3182
3183
3184 JNI_ENTRY(const jchar*, jni_GetStringCritical(JNIEnv *env, jstring string, jboolean *isCopy))
3185 JNIWrapper("GetStringCritical");
3186 HOTSPOT_JNI_GETSTRINGCRITICAL_ENTRY(env, string, (uintptr_t *) isCopy);
3187 GCLocker::lock_critical(thread);
3188 oop s = JNIHandles::resolve_non_null(string);
3189 typeArrayOop s_value = java_lang_String::value(s);
3190 bool is_latin1 = java_lang_String::is_latin1(s);
3191 if (isCopy != NULL) {
3192 *isCopy = is_latin1 ? JNI_TRUE : JNI_FALSE;
3193 }
3194 jchar* ret;
3195 if (!is_latin1) {
3196 ret = (jchar*) s_value->base(T_CHAR);
3197 } else {
3198 // Inflate latin1 encoded string to UTF16
3199 int s_len = java_lang_String::length(s);
3200 ret = NEW_C_HEAP_ARRAY_RETURN_NULL(jchar, s_len + 1, mtInternal); // add one for zero termination
3201 /* JNI Specification states return NULL on OOM */
3202 if (ret != NULL) {
3203 for (int i = 0; i < s_len; i++) {
3204 ret[i] = ((jchar) s_value->byte_at(i)) & 0xff;
3205 }
3206 ret[s_len] = 0;
3207 }
3208 }
3209 HOTSPOT_JNI_GETSTRINGCRITICAL_RETURN((uint16_t *) ret);
3210 return ret;
3211 JNI_END
3212
3213
3214 JNI_ENTRY(void, jni_ReleaseStringCritical(JNIEnv *env, jstring str, const jchar *chars))
3215 JNIWrapper("ReleaseStringCritical");
3216 HOTSPOT_JNI_RELEASESTRINGCRITICAL_ENTRY(env, str, (uint16_t *) chars);
3217 // The str and chars arguments are ignored for UTF16 strings
3218 oop s = JNIHandles::resolve_non_null(str);
3219 bool is_latin1 = java_lang_String::is_latin1(s);
3220 if (is_latin1) {
3221 // For latin1 string, free jchar array allocated by earlier call to GetStringCritical.
3222 // This assumes that ReleaseStringCritical bookends GetStringCritical.
3223 FREE_C_HEAP_ARRAY(jchar, chars);
3224 }
3225 GCLocker::unlock_critical(thread);
3226 HOTSPOT_JNI_RELEASESTRINGCRITICAL_RETURN();
3227 JNI_END
3228
3229
3230 JNI_ENTRY(jweak, jni_NewWeakGlobalRef(JNIEnv *env, jobject ref))
3231 JNIWrapper("jni_NewWeakGlobalRef");
3232 HOTSPOT_JNI_NEWWEAKGLOBALREF_ENTRY(env, ref);
3233 Handle ref_handle(thread, JNIHandles::resolve(ref));
3234 jweak ret = JNIHandles::make_weak_global(ref_handle);
3235 HOTSPOT_JNI_NEWWEAKGLOBALREF_RETURN(ret);
3236 return ret;
3237 JNI_END
3238
3239 // Must be JNI_ENTRY (with HandleMark)
3240 JNI_ENTRY(void, jni_DeleteWeakGlobalRef(JNIEnv *env, jweak ref))
3241 JNIWrapper("jni_DeleteWeakGlobalRef");
3242 HOTSPOT_JNI_DELETEWEAKGLOBALREF_ENTRY(env, ref);
3243 JNIHandles::destroy_weak_global(ref);
3244 HOTSPOT_JNI_DELETEWEAKGLOBALREF_RETURN();
3245 JNI_END
3246
3247
3248 JNI_QUICK_ENTRY(jboolean, jni_ExceptionCheck(JNIEnv *env))
3249 JNIWrapper("jni_ExceptionCheck");
3250 HOTSPOT_JNI_EXCEPTIONCHECK_ENTRY(env);
3251 jni_check_async_exceptions(thread);
3252 jboolean ret = (thread->has_pending_exception()) ? JNI_TRUE : JNI_FALSE;
3253 HOTSPOT_JNI_EXCEPTIONCHECK_RETURN(ret);
3254 return ret;
3255 JNI_END
3256
3257
3258 // Initialization state for three routines below relating to
3259 // java.nio.DirectBuffers
3260 static jint directBufferSupportInitializeStarted = 0;
3261 static volatile jint directBufferSupportInitializeEnded = 0;
3262 static volatile jint directBufferSupportInitializeFailed = 0;
3263 static jclass bufferClass = NULL;
3264 static jclass directBufferClass = NULL;
3265 static jclass directByteBufferClass = NULL;
3266 static jmethodID directByteBufferConstructor = NULL;
3267 static jfieldID directBufferAddressField = NULL;
3268 static jfieldID bufferCapacityField = NULL;
3269
3270 static jclass lookupOne(JNIEnv* env, const char* name, TRAPS) {
3271 Handle loader; // null (bootstrap) loader
3272 Handle protection_domain; // null protection domain
3273
3274 TempNewSymbol sym = SymbolTable::new_symbol(name, CHECK_NULL);
3275 jclass result = find_class_from_class_loader(env, sym, true, loader, protection_domain, true, CHECK_NULL);
3276
3277 if (log_is_enabled(Info, classresolve) && result != NULL) {
3278 trace_class_resolution(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(result)));
3279 }
3280 return result;
3281 }
3282
3283 // These lookups are done with the NULL (bootstrap) ClassLoader to
3284 // circumvent any security checks that would be done by jni_FindClass.
3285 JNI_ENTRY(bool, lookupDirectBufferClasses(JNIEnv* env))
3286 {
3287 if ((bufferClass = lookupOne(env, "java/nio/Buffer", thread)) == NULL) { return false; }
3288 if ((directBufferClass = lookupOne(env, "sun/nio/ch/DirectBuffer", thread)) == NULL) { return false; }
3289 if ((directByteBufferClass = lookupOne(env, "java/nio/DirectByteBuffer", thread)) == NULL) { return false; }
3290 return true;
3291 }
3292 JNI_END
3293
3294
3295 static bool initializeDirectBufferSupport(JNIEnv* env, JavaThread* thread) {
3296 if (directBufferSupportInitializeFailed) {
3297 return false;
3298 }
3299
3300 if (Atomic::cmpxchg(1, &directBufferSupportInitializeStarted, 0) == 0) {
3301 if (!lookupDirectBufferClasses(env)) {
3302 directBufferSupportInitializeFailed = 1;
3303 return false;
3304 }
3305
3306 // Make global references for these
3307 bufferClass = (jclass) env->NewGlobalRef(bufferClass);
3308 directBufferClass = (jclass) env->NewGlobalRef(directBufferClass);
3309 directByteBufferClass = (jclass) env->NewGlobalRef(directByteBufferClass);
3310
3311 // Get needed field and method IDs
3312 directByteBufferConstructor = env->GetMethodID(directByteBufferClass, "<init>", "(JI)V");
3313 if (env->ExceptionCheck()) {
3314 env->ExceptionClear();
3315 directBufferSupportInitializeFailed = 1;
3316 return false;
3317 }
3318 directBufferAddressField = env->GetFieldID(bufferClass, "address", "J");
3319 if (env->ExceptionCheck()) {
3320 env->ExceptionClear();
3321 directBufferSupportInitializeFailed = 1;
3322 return false;
3323 }
3324 bufferCapacityField = env->GetFieldID(bufferClass, "capacity", "I");
3325 if (env->ExceptionCheck()) {
3326 env->ExceptionClear();
3327 directBufferSupportInitializeFailed = 1;
3328 return false;
3329 }
3330
3331 if ((directByteBufferConstructor == NULL) ||
3332 (directBufferAddressField == NULL) ||
3333 (bufferCapacityField == NULL)) {
3334 directBufferSupportInitializeFailed = 1;
3335 return false;
3336 }
3337
3338 directBufferSupportInitializeEnded = 1;
3339 } else {
3340 while (!directBufferSupportInitializeEnded && !directBufferSupportInitializeFailed) {
3341 os::naked_yield();
3342 }
3343 }
3344
3345 return !directBufferSupportInitializeFailed;
3346 }
3347
3348 extern "C" jobject JNICALL jni_NewDirectByteBuffer(JNIEnv *env, void* address, jlong capacity)
3349 {
3350 // thread_from_jni_environment() will block if VM is gone.
3351 JavaThread* thread = JavaThread::thread_from_jni_environment(env);
3352
3353 JNIWrapper("jni_NewDirectByteBuffer");
3354 HOTSPOT_JNI_NEWDIRECTBYTEBUFFER_ENTRY(env, address, capacity);
3355
3356 if (!directBufferSupportInitializeEnded) {
3357 if (!initializeDirectBufferSupport(env, thread)) {
3358 HOTSPOT_JNI_NEWDIRECTBYTEBUFFER_RETURN(NULL);
3359 return NULL;
3360 }
3361 }
3362
3363 // Being paranoid about accidental sign extension on address
3364 jlong addr = (jlong) ((uintptr_t) address);
3365 // NOTE that package-private DirectByteBuffer constructor currently
3366 // takes int capacity
3367 jint cap = (jint) capacity;
3368 jobject ret = env->NewObject(directByteBufferClass, directByteBufferConstructor, addr, cap);
3369 HOTSPOT_JNI_NEWDIRECTBYTEBUFFER_RETURN(ret);
3370 return ret;
3371 }
3372
3373 DT_RETURN_MARK_DECL(GetDirectBufferAddress, void*
3374 , HOTSPOT_JNI_GETDIRECTBUFFERADDRESS_RETURN((void*) _ret_ref));
3375
3376 extern "C" void* JNICALL jni_GetDirectBufferAddress(JNIEnv *env, jobject buf)
3377 {
3378 // thread_from_jni_environment() will block if VM is gone.
3379 JavaThread* thread = JavaThread::thread_from_jni_environment(env);
3380
3381 JNIWrapper("jni_GetDirectBufferAddress");
3382 HOTSPOT_JNI_GETDIRECTBUFFERADDRESS_ENTRY(env, buf);
3383 void* ret = NULL;
3384 DT_RETURN_MARK(GetDirectBufferAddress, void*, (const void*&)ret);
3385
3386 if (!directBufferSupportInitializeEnded) {
3387 if (!initializeDirectBufferSupport(env, thread)) {
3388 return 0;
3389 }
3390 }
3391
3392 if ((buf != NULL) && (!env->IsInstanceOf(buf, directBufferClass))) {
3393 return 0;
3394 }
3395
3396 ret = (void*)(intptr_t)env->GetLongField(buf, directBufferAddressField);
3397 return ret;
3398 }
3399
3400 DT_RETURN_MARK_DECL(GetDirectBufferCapacity, jlong
3401 , HOTSPOT_JNI_GETDIRECTBUFFERCAPACITY_RETURN(_ret_ref));
3402
3403 extern "C" jlong JNICALL jni_GetDirectBufferCapacity(JNIEnv *env, jobject buf)
3404 {
3405 // thread_from_jni_environment() will block if VM is gone.
3406 JavaThread* thread = JavaThread::thread_from_jni_environment(env);
3407
3408 JNIWrapper("jni_GetDirectBufferCapacity");
3409 HOTSPOT_JNI_GETDIRECTBUFFERCAPACITY_ENTRY(env, buf);
3410 jlong ret = -1;
3411 DT_RETURN_MARK(GetDirectBufferCapacity, jlong, (const jlong&)ret);
3412
3413 if (!directBufferSupportInitializeEnded) {
3414 if (!initializeDirectBufferSupport(env, thread)) {
3415 ret = 0;
3416 return ret;
3417 }
3418 }
3419
3420 if (buf == NULL) {
3421 return -1;
3422 }
3423
3424 if (!env->IsInstanceOf(buf, directBufferClass)) {
3425 return -1;
3426 }
3427
3428 // NOTE that capacity is currently an int in the implementation
3429 ret = env->GetIntField(buf, bufferCapacityField);
3430 return ret;
3431 }
3432
3433
3434 JNI_LEAF(jint, jni_GetVersion(JNIEnv *env))
3435 JNIWrapper("GetVersion");
3436 HOTSPOT_JNI_GETVERSION_ENTRY(env);
3437 HOTSPOT_JNI_GETVERSION_RETURN(CurrentVersion);
3438 return CurrentVersion;
3439 JNI_END
3440
3441 extern struct JavaVM_ main_vm;
3442
3443 JNI_LEAF(jint, jni_GetJavaVM(JNIEnv *env, JavaVM **vm))
3444 JNIWrapper("jni_GetJavaVM");
3445 HOTSPOT_JNI_GETJAVAVM_ENTRY(env, (void **) vm);
3446 *vm = (JavaVM *)(&main_vm);
3447 HOTSPOT_JNI_GETJAVAVM_RETURN(JNI_OK);
3448 return JNI_OK;
3449 JNI_END
3450
3451 // Structure containing all jni functions
3452 struct JNINativeInterface_ jni_NativeInterface = {
3453 NULL,
3454 NULL,
3455 NULL,
3456
3457 NULL,
3458
3459 jni_GetVersion,
3460
3461 jni_DefineClass,
3462 jni_FindClass,
3463
3464 jni_FromReflectedMethod,
3465 jni_FromReflectedField,
3466
3467 jni_ToReflectedMethod,
3468
3469 jni_GetSuperclass,
3470 jni_IsAssignableFrom,
3471
3472 jni_ToReflectedField,
3473
3474 jni_Throw,
3475 jni_ThrowNew,
3476 jni_ExceptionOccurred,
3477 jni_ExceptionDescribe,
3478 jni_ExceptionClear,
3479 jni_FatalError,
3480
3481 jni_PushLocalFrame,
3482 jni_PopLocalFrame,
3483
3484 jni_NewGlobalRef,
3485 jni_DeleteGlobalRef,
3486 jni_DeleteLocalRef,
3487 jni_IsSameObject,
3488
3489 jni_NewLocalRef,
3490 jni_EnsureLocalCapacity,
3491
3492 jni_AllocObject,
3493 jni_NewObject,
3494 jni_NewObjectV,
3495 jni_NewObjectA,
3496
3497 jni_GetObjectClass,
3498 jni_IsInstanceOf,
3499
3500 jni_GetMethodID,
3501
3502 jni_CallObjectMethod,
3503 jni_CallObjectMethodV,
3504 jni_CallObjectMethodA,
3505 jni_CallBooleanMethod,
3506 jni_CallBooleanMethodV,
3507 jni_CallBooleanMethodA,
3508 jni_CallByteMethod,
3509 jni_CallByteMethodV,
3510 jni_CallByteMethodA,
3511 jni_CallCharMethod,
3512 jni_CallCharMethodV,
3513 jni_CallCharMethodA,
3514 jni_CallShortMethod,
3515 jni_CallShortMethodV,
3516 jni_CallShortMethodA,
3517 jni_CallIntMethod,
3518 jni_CallIntMethodV,
3519 jni_CallIntMethodA,
3520 jni_CallLongMethod,
3521 jni_CallLongMethodV,
3522 jni_CallLongMethodA,
3523 jni_CallFloatMethod,
3524 jni_CallFloatMethodV,
3525 jni_CallFloatMethodA,
3526 jni_CallDoubleMethod,
3527 jni_CallDoubleMethodV,
3528 jni_CallDoubleMethodA,
3529 jni_CallVoidMethod,
3530 jni_CallVoidMethodV,
3531 jni_CallVoidMethodA,
3532
3533 jni_CallNonvirtualObjectMethod,
3534 jni_CallNonvirtualObjectMethodV,
3535 jni_CallNonvirtualObjectMethodA,
3536 jni_CallNonvirtualBooleanMethod,
3537 jni_CallNonvirtualBooleanMethodV,
3538 jni_CallNonvirtualBooleanMethodA,
3539 jni_CallNonvirtualByteMethod,
3540 jni_CallNonvirtualByteMethodV,
3541 jni_CallNonvirtualByteMethodA,
3542 jni_CallNonvirtualCharMethod,
3543 jni_CallNonvirtualCharMethodV,
3544 jni_CallNonvirtualCharMethodA,
3545 jni_CallNonvirtualShortMethod,
3546 jni_CallNonvirtualShortMethodV,
3547 jni_CallNonvirtualShortMethodA,
3548 jni_CallNonvirtualIntMethod,
3549 jni_CallNonvirtualIntMethodV,
3550 jni_CallNonvirtualIntMethodA,
3551 jni_CallNonvirtualLongMethod,
3552 jni_CallNonvirtualLongMethodV,
3553 jni_CallNonvirtualLongMethodA,
3554 jni_CallNonvirtualFloatMethod,
3555 jni_CallNonvirtualFloatMethodV,
3556 jni_CallNonvirtualFloatMethodA,
3557 jni_CallNonvirtualDoubleMethod,
3558 jni_CallNonvirtualDoubleMethodV,
3559 jni_CallNonvirtualDoubleMethodA,
3560 jni_CallNonvirtualVoidMethod,
3561 jni_CallNonvirtualVoidMethodV,
3562 jni_CallNonvirtualVoidMethodA,
3563
3564 jni_GetFieldID,
3565
3566 jni_GetObjectField,
3567 jni_GetBooleanField,
3568 jni_GetByteField,
3569 jni_GetCharField,
3570 jni_GetShortField,
3571 jni_GetIntField,
3572 jni_GetLongField,
3573 jni_GetFloatField,
3574 jni_GetDoubleField,
3575
3576 jni_SetObjectField,
3577 jni_SetBooleanField,
3578 jni_SetByteField,
3579 jni_SetCharField,
3580 jni_SetShortField,
3581 jni_SetIntField,
3582 jni_SetLongField,
3583 jni_SetFloatField,
3584 jni_SetDoubleField,
3585
3586 jni_GetStaticMethodID,
3587
3588 jni_CallStaticObjectMethod,
3589 jni_CallStaticObjectMethodV,
3590 jni_CallStaticObjectMethodA,
3591 jni_CallStaticBooleanMethod,
3592 jni_CallStaticBooleanMethodV,
3593 jni_CallStaticBooleanMethodA,
3594 jni_CallStaticByteMethod,
3595 jni_CallStaticByteMethodV,
3596 jni_CallStaticByteMethodA,
3597 jni_CallStaticCharMethod,
3598 jni_CallStaticCharMethodV,
3599 jni_CallStaticCharMethodA,
3600 jni_CallStaticShortMethod,
3601 jni_CallStaticShortMethodV,
3602 jni_CallStaticShortMethodA,
3603 jni_CallStaticIntMethod,
3604 jni_CallStaticIntMethodV,
3605 jni_CallStaticIntMethodA,
3606 jni_CallStaticLongMethod,
3607 jni_CallStaticLongMethodV,
3608 jni_CallStaticLongMethodA,
3609 jni_CallStaticFloatMethod,
3610 jni_CallStaticFloatMethodV,
3611 jni_CallStaticFloatMethodA,
3612 jni_CallStaticDoubleMethod,
3613 jni_CallStaticDoubleMethodV,
3614 jni_CallStaticDoubleMethodA,
3615 jni_CallStaticVoidMethod,
3616 jni_CallStaticVoidMethodV,
3617 jni_CallStaticVoidMethodA,
3618
3619 jni_GetStaticFieldID,
3620
3621 jni_GetStaticObjectField,
3622 jni_GetStaticBooleanField,
3623 jni_GetStaticByteField,
3624 jni_GetStaticCharField,
3625 jni_GetStaticShortField,
3626 jni_GetStaticIntField,
3627 jni_GetStaticLongField,
3628 jni_GetStaticFloatField,
3629 jni_GetStaticDoubleField,
3630
3631 jni_SetStaticObjectField,
3632 jni_SetStaticBooleanField,
3633 jni_SetStaticByteField,
3634 jni_SetStaticCharField,
3635 jni_SetStaticShortField,
3636 jni_SetStaticIntField,
3637 jni_SetStaticLongField,
3638 jni_SetStaticFloatField,
3639 jni_SetStaticDoubleField,
3640
3641 jni_NewString,
3642 jni_GetStringLength,
3643 jni_GetStringChars,
3644 jni_ReleaseStringChars,
3645
3646 jni_NewStringUTF,
3647 jni_GetStringUTFLength,
3648 jni_GetStringUTFChars,
3649 jni_ReleaseStringUTFChars,
3650
3651 jni_GetArrayLength,
3652
3653 jni_NewObjectArray,
3654 jni_GetObjectArrayElement,
3655 jni_SetObjectArrayElement,
3656
3657 jni_NewBooleanArray,
3658 jni_NewByteArray,
3659 jni_NewCharArray,
3660 jni_NewShortArray,
3661 jni_NewIntArray,
3662 jni_NewLongArray,
3663 jni_NewFloatArray,
3664 jni_NewDoubleArray,
3665
3666 jni_GetBooleanArrayElements,
3667 jni_GetByteArrayElements,
3668 jni_GetCharArrayElements,
3669 jni_GetShortArrayElements,
3670 jni_GetIntArrayElements,
3671 jni_GetLongArrayElements,
3672 jni_GetFloatArrayElements,
3673 jni_GetDoubleArrayElements,
3674
3675 jni_ReleaseBooleanArrayElements,
3676 jni_ReleaseByteArrayElements,
3677 jni_ReleaseCharArrayElements,
3678 jni_ReleaseShortArrayElements,
3679 jni_ReleaseIntArrayElements,
3680 jni_ReleaseLongArrayElements,
3681 jni_ReleaseFloatArrayElements,
3682 jni_ReleaseDoubleArrayElements,
3683
3684 jni_GetBooleanArrayRegion,
3685 jni_GetByteArrayRegion,
3686 jni_GetCharArrayRegion,
3687 jni_GetShortArrayRegion,
3688 jni_GetIntArrayRegion,
3689 jni_GetLongArrayRegion,
3690 jni_GetFloatArrayRegion,
3691 jni_GetDoubleArrayRegion,
3692
3693 jni_SetBooleanArrayRegion,
3694 jni_SetByteArrayRegion,
3695 jni_SetCharArrayRegion,
3696 jni_SetShortArrayRegion,
3697 jni_SetIntArrayRegion,
3698 jni_SetLongArrayRegion,
3699 jni_SetFloatArrayRegion,
3700 jni_SetDoubleArrayRegion,
3701
3702 jni_RegisterNatives,
3703 jni_UnregisterNatives,
3704
3705 jni_MonitorEnter,
3706 jni_MonitorExit,
3707
3708 jni_GetJavaVM,
3709
3710 jni_GetStringRegion,
3711 jni_GetStringUTFRegion,
3712
3713 jni_GetPrimitiveArrayCritical,
3714 jni_ReleasePrimitiveArrayCritical,
3715
3716 jni_GetStringCritical,
3717 jni_ReleaseStringCritical,
3718
3719 jni_NewWeakGlobalRef,
3720 jni_DeleteWeakGlobalRef,
3721
3722 jni_ExceptionCheck,
3723
3724 jni_NewDirectByteBuffer,
3725 jni_GetDirectBufferAddress,
3726 jni_GetDirectBufferCapacity,
3727
3728 // New 1_6 features
3729
3730 jni_GetObjectRefType
3731 };
3732
3733
3734 // For jvmti use to modify jni function table.
3735 // Java threads in native contiues to run until it is transitioned
3736 // to VM at safepoint. Before the transition or before it is blocked
3737 // for safepoint it may access jni function table. VM could crash if
3738 // any java thread access the jni function table in the middle of memcpy.
3739 // To avoid this each function pointers are copied automically.
3740 void copy_jni_function_table(const struct JNINativeInterface_ *new_jni_NativeInterface) {
3741 assert(SafepointSynchronize::is_at_safepoint(), "must be at safepoint");
3742 intptr_t *a = (intptr_t *) jni_functions();
3743 intptr_t *b = (intptr_t *) new_jni_NativeInterface;
3744 for (uint i=0; i < sizeof(struct JNINativeInterface_)/sizeof(void *); i++) {
3745 Atomic::store_ptr(*b++, a++);
3746 }
3747 }
3748
3749 void quicken_jni_functions() {
3750 // Replace Get<Primitive>Field with fast versions
3751 if (UseFastJNIAccessors && !JvmtiExport::can_post_field_access()
3752 && !VerifyJNIFields && !CountJNICalls && !CheckJNICalls
3753 #if defined(_WINDOWS) && defined(IA32) && defined(COMPILER2)
3754 // windows x86 currently needs SEH wrapper and the gain of the fast
3755 // versions currently isn't certain for server vm on uniprocessor.
3756 && os::is_MP()
3757 #endif
3758 ) {
3759 address func;
3760 func = JNI_FastGetField::generate_fast_get_boolean_field();
3761 if (func != (address)-1) {
3762 jni_NativeInterface.GetBooleanField = (GetBooleanField_t)func;
3763 }
3764 func = JNI_FastGetField::generate_fast_get_byte_field();
3765 if (func != (address)-1) {
3766 jni_NativeInterface.GetByteField = (GetByteField_t)func;
3767 }
3768 func = JNI_FastGetField::generate_fast_get_char_field();
3769 if (func != (address)-1) {
3770 jni_NativeInterface.GetCharField = (GetCharField_t)func;
3771 }
3772 func = JNI_FastGetField::generate_fast_get_short_field();
3773 if (func != (address)-1) {
3774 jni_NativeInterface.GetShortField = (GetShortField_t)func;
3775 }
3776 func = JNI_FastGetField::generate_fast_get_int_field();
3777 if (func != (address)-1) {
3778 jni_NativeInterface.GetIntField = (GetIntField_t)func;
3779 }
3780 func = JNI_FastGetField::generate_fast_get_long_field();
3781 if (func != (address)-1) {
3782 jni_NativeInterface.GetLongField = (GetLongField_t)func;
3783 }
3784 func = JNI_FastGetField::generate_fast_get_float_field();
3785 if (func != (address)-1) {
3786 jni_NativeInterface.GetFloatField = (GetFloatField_t)func;
3787 }
3788 func = JNI_FastGetField::generate_fast_get_double_field();
3789 if (func != (address)-1) {
3790 jni_NativeInterface.GetDoubleField = (GetDoubleField_t)func;
3791 }
3792 }
3793 }
3794
3795 // Returns the function structure
3796 struct JNINativeInterface_* jni_functions() {
3797 #if INCLUDE_JNI_CHECK
3798 if (CheckJNICalls) return jni_functions_check();
3799 #endif // INCLUDE_JNI_CHECK
3800 return &jni_NativeInterface;
3801 }
3802
3803 // Returns the function structure
3804 struct JNINativeInterface_* jni_functions_nocheck() {
3805 return &jni_NativeInterface;
3806 }
3807
3808
3809 // Invocation API
3810
3811
3812 // Forward declaration
3813 extern const struct JNIInvokeInterface_ jni_InvokeInterface;
3814
3815 // Global invocation API vars
3816 volatile jint vm_created = 0;
3817 // Indicate whether it is safe to recreate VM
3818 volatile jint safe_to_recreate_vm = 1;
3819 struct JavaVM_ main_vm = {&jni_InvokeInterface};
3820
3821
3822 #define JAVASTACKSIZE (400 * 1024) /* Default size of a thread java stack */
3823 enum { VERIFY_NONE, VERIFY_REMOTE, VERIFY_ALL };
3824
3825 DT_RETURN_MARK_DECL(GetDefaultJavaVMInitArgs, jint
3826 , HOTSPOT_JNI_GETDEFAULTJAVAVMINITARGS_RETURN(_ret_ref));
3827
3828 _JNI_IMPORT_OR_EXPORT_ jint JNICALL JNI_GetDefaultJavaVMInitArgs(void *args_) {
3829 HOTSPOT_JNI_GETDEFAULTJAVAVMINITARGS_ENTRY(args_);
3830 JDK1_1InitArgs *args = (JDK1_1InitArgs *)args_;
3831 jint ret = JNI_ERR;
3832 DT_RETURN_MARK(GetDefaultJavaVMInitArgs, jint, (const jint&)ret);
3833
3834 if (Threads::is_supported_jni_version(args->version)) {
3835 ret = JNI_OK;
3836 }
3837 // 1.1 style no longer supported in hotspot.
3838 // According the JNI spec, we should update args->version on return.
3839 // We also use the structure to communicate with launcher about default
3840 // stack size.
3841 if (args->version == JNI_VERSION_1_1) {
3842 args->version = JNI_VERSION_1_2;
3843 // javaStackSize is int in arguments structure
3844 assert(jlong(ThreadStackSize) * K < INT_MAX, "integer overflow");
3845 args->javaStackSize = (jint)(ThreadStackSize * K);
3846 }
3847 return ret;
3848 }
3849
3850 DT_RETURN_MARK_DECL(CreateJavaVM, jint
3851 , HOTSPOT_JNI_CREATEJAVAVM_RETURN(_ret_ref));
3852
3853 static jint JNI_CreateJavaVM_inner(JavaVM **vm, void **penv, void *args) {
3854 HOTSPOT_JNI_CREATEJAVAVM_ENTRY((void **) vm, penv, args);
3855
3856 jint result = JNI_ERR;
3857 DT_RETURN_MARK(CreateJavaVM, jint, (const jint&)result);
3858
3859 // We're about to use Atomic::xchg for synchronization. Some Zero
3860 // platforms use the GCC builtin __sync_lock_test_and_set for this,
3861 // but __sync_lock_test_and_set is not guaranteed to do what we want
3862 // on all architectures. So we check it works before relying on it.
3863 #if defined(ZERO) && defined(ASSERT)
3864 {
3865 jint a = 0xcafebabe;
3866 jint b = Atomic::xchg(0xdeadbeef, &a);
3867 void *c = &a;
3868 void *d = Atomic::xchg_ptr(&b, &c);
3869 assert(a == (jint) 0xdeadbeef && b == (jint) 0xcafebabe, "Atomic::xchg() works");
3870 assert(c == &b && d == &a, "Atomic::xchg_ptr() works");
3871 }
3872 #endif // ZERO && ASSERT
3873
3874 // At the moment it's only possible to have one Java VM,
3875 // since some of the runtime state is in global variables.
3876
3877 // We cannot use our mutex locks here, since they only work on
3878 // Threads. We do an atomic compare and exchange to ensure only
3879 // one thread can call this method at a time
3880
3881 // We use Atomic::xchg rather than Atomic::add/dec since on some platforms
3882 // the add/dec implementations are dependent on whether we are running
3883 // on a multiprocessor, and at this stage of initialization the os::is_MP
3884 // function used to determine this will always return false. Atomic::xchg
3885 // does not have this problem.
3886 if (Atomic::xchg(1, &vm_created) == 1) {
3887 return JNI_EEXIST; // already created, or create attempt in progress
3888 }
3889 if (Atomic::xchg(0, &safe_to_recreate_vm) == 0) {
3890 return JNI_ERR; // someone tried and failed and retry not allowed.
3891 }
3892
3893 assert(vm_created == 1, "vm_created is true during the creation");
3894
3895 /**
3896 * Certain errors during initialization are recoverable and do not
3897 * prevent this method from being called again at a later time
3898 * (perhaps with different arguments). However, at a certain
3899 * point during initialization if an error occurs we cannot allow
3900 * this function to be called again (or it will crash). In those
3901 * situations, the 'canTryAgain' flag is set to false, which atomically
3902 * sets safe_to_recreate_vm to 1, such that any new call to
3903 * JNI_CreateJavaVM will immediately fail using the above logic.
3904 */
3905 bool can_try_again = true;
3906
3907 result = Threads::create_vm((JavaVMInitArgs*) args, &can_try_again);
3908 if (result == JNI_OK) {
3909 JavaThread *thread = JavaThread::current();
3910 assert(!thread->has_pending_exception(), "should have returned not OK");
3911 /* thread is thread_in_vm here */
3912 *vm = (JavaVM *)(&main_vm);
3913 *(JNIEnv**)penv = thread->jni_environment();
3914
3915 #if INCLUDE_JVMCI
3916 if (EnableJVMCI) {
3917 if (UseJVMCICompiler) {
3918 // JVMCI is initialized on a CompilerThread
3919 if (BootstrapJVMCI) {
3920 JavaThread* THREAD = thread;
3921 JVMCICompiler* compiler = JVMCICompiler::instance(CATCH);
3922 compiler->bootstrap();
3923 }
3924 }
3925 }
3926 #endif
3927
3928 // Tracks the time application was running before GC
3929 RuntimeService::record_application_start();
3930
3931 // Notify JVMTI
3932 if (JvmtiExport::should_post_thread_life()) {
3933 JvmtiExport::post_thread_start(thread);
3934 }
3935
3936 EventThreadStart event;
3937 if (event.should_commit()) {
3938 event.set_javalangthread(java_lang_Thread::thread_id(thread->threadObj()));
3939 event.commit();
3940 }
3941
3942 #ifndef PRODUCT
3943 // Check if we should compile all classes on bootclasspath
3944 if (CompileTheWorld) ClassLoader::compile_the_world();
3945 if (ReplayCompiles) ciReplay::replay(thread);
3946
3947 // Some platforms (like Win*) need a wrapper around these test
3948 // functions in order to properly handle error conditions.
3949 test_error_handler();
3950 if (ExecuteInternalVMTests) {
3951 InternalVMTests::run();
3952 }
3953 #endif
3954
3955 // Since this is not a JVM_ENTRY we have to set the thread state manually before leaving.
3956 ThreadStateTransition::transition_and_fence(thread, _thread_in_vm, _thread_in_native);
3957 } else {
3958 // If create_vm exits because of a pending exception, exit with that
3959 // exception. In the future when we figure out how to reclaim memory,
3960 // we may be able to exit with JNI_ERR and allow the calling application
3961 // to continue.
3962 if (Universe::is_fully_initialized()) {
3963 // otherwise no pending exception possible - VM will already have aborted
3964 JavaThread* THREAD = JavaThread::current();
3965 if (HAS_PENDING_EXCEPTION) {
3966 HandleMark hm;
3967 vm_exit_during_initialization(Handle(THREAD, PENDING_EXCEPTION));
3968 }
3969 }
3970
3971 if (can_try_again) {
3972 // reset safe_to_recreate_vm to 1 so that retrial would be possible
3973 safe_to_recreate_vm = 1;
3974 }
3975
3976 // Creation failed. We must reset vm_created
3977 *vm = 0;
3978 *(JNIEnv**)penv = 0;
3979 // reset vm_created last to avoid race condition. Use OrderAccess to
3980 // control both compiler and architectural-based reordering.
3981 OrderAccess::release_store(&vm_created, 0);
3982 }
3983
3984 // Flush stdout and stderr before exit.
3985 fflush(stdout);
3986 fflush(stderr);
3987
3988 return result;
3989
3990 }
3991
3992 _JNI_IMPORT_OR_EXPORT_ jint JNICALL JNI_CreateJavaVM(JavaVM **vm, void **penv, void *args) {
3993 jint result = 0;
3994 // On Windows, let CreateJavaVM run with SEH protection
3995 #ifdef _WIN32
3996 __try {
3997 #endif
3998 result = JNI_CreateJavaVM_inner(vm, penv, args);
3999 #ifdef _WIN32
4000 } __except(topLevelExceptionFilter((_EXCEPTION_POINTERS*)_exception_info())) {
4001 // Nothing to do.
4002 }
4003 #endif
4004 return result;
4005 }
4006
4007 _JNI_IMPORT_OR_EXPORT_ jint JNICALL JNI_GetCreatedJavaVMs(JavaVM **vm_buf, jsize bufLen, jsize *numVMs) {
4008 // See bug 4367188, the wrapper can sometimes cause VM crashes
4009 // JNIWrapper("GetCreatedJavaVMs");
4010
4011 HOTSPOT_JNI_GETCREATEDJAVAVMS_ENTRY((void **) vm_buf, bufLen, (uintptr_t *) numVMs);
4012
4013 if (vm_created) {
4014 if (numVMs != NULL) *numVMs = 1;
4015 if (bufLen > 0) *vm_buf = (JavaVM *)(&main_vm);
4016 } else {
4017 if (numVMs != NULL) *numVMs = 0;
4018 }
4019 HOTSPOT_JNI_GETCREATEDJAVAVMS_RETURN(JNI_OK);
4020 return JNI_OK;
4021 }
4022
4023 extern "C" {
4024
4025 DT_RETURN_MARK_DECL(DestroyJavaVM, jint
4026 , HOTSPOT_JNI_DESTROYJAVAVM_RETURN(_ret_ref));
4027
4028 jint JNICALL jni_DestroyJavaVM(JavaVM *vm) {
4029 HOTSPOT_JNI_DESTROYJAVAVM_ENTRY(vm);
4030 jint res = JNI_ERR;
4031 DT_RETURN_MARK(DestroyJavaVM, jint, (const jint&)res);
4032
4033 if (!vm_created) {
4034 res = JNI_ERR;
4035 return res;
4036 }
4037
4038 JNIWrapper("DestroyJavaVM");
4039 JNIEnv *env;
4040 JavaVMAttachArgs destroyargs;
4041 destroyargs.version = CurrentVersion;
4042 destroyargs.name = (char *)"DestroyJavaVM";
4043 destroyargs.group = NULL;
4044 res = vm->AttachCurrentThread((void **)&env, (void *)&destroyargs);
4045 if (res != JNI_OK) {
4046 return res;
4047 }
4048
4049 // Since this is not a JVM_ENTRY we have to set the thread state manually before entering.
4050 JavaThread* thread = JavaThread::current();
4051 ThreadStateTransition::transition_from_native(thread, _thread_in_vm);
4052 if (Threads::destroy_vm()) {
4053 // Should not change thread state, VM is gone
4054 vm_created = false;
4055 res = JNI_OK;
4056 return res;
4057 } else {
4058 ThreadStateTransition::transition_and_fence(thread, _thread_in_vm, _thread_in_native);
4059 res = JNI_ERR;
4060 return res;
4061 }
4062 }
4063
4064
4065 static jint attach_current_thread(JavaVM *vm, void **penv, void *_args, bool daemon) {
4066 JavaVMAttachArgs *args = (JavaVMAttachArgs *) _args;
4067
4068 // Check below commented out from JDK1.2fcs as well
4069 /*
4070 if (args && (args->version != JNI_VERSION_1_1 || args->version != JNI_VERSION_1_2)) {
4071 return JNI_EVERSION;
4072 }
4073 */
4074
4075 Thread* t = Thread::current_or_null();
4076 if (t != NULL) {
4077 // If the thread has been attached this operation is a no-op
4078 *(JNIEnv**)penv = ((JavaThread*) t)->jni_environment();
4079 return JNI_OK;
4080 }
4081
4082 // Create a thread and mark it as attaching so it will be skipped by the
4083 // ThreadsListEnumerator - see CR 6404306
4084 JavaThread* thread = new JavaThread(true);
4085
4086 // Set correct safepoint info. The thread is going to call into Java when
4087 // initializing the Java level thread object. Hence, the correct state must
4088 // be set in order for the Safepoint code to deal with it correctly.
4089 thread->set_thread_state(_thread_in_vm);
4090 thread->record_stack_base_and_size();
4091 thread->initialize_thread_current();
4092
4093 if (!os::create_attached_thread(thread)) {
4094 delete thread;
4095 return JNI_ERR;
4096 }
4097 // Enable stack overflow checks
4098 thread->create_stack_guard_pages();
4099
4100 thread->initialize_tlab();
4101
4102 thread->cache_global_variables();
4103
4104 // Crucial that we do not have a safepoint check for this thread, since it has
4105 // not been added to the Thread list yet.
4106 { Threads_lock->lock_without_safepoint_check();
4107 // This must be inside this lock in order to get FullGCALot to work properly, i.e., to
4108 // avoid this thread trying to do a GC before it is added to the thread-list
4109 thread->set_active_handles(JNIHandleBlock::allocate_block());
4110 Threads::add(thread, daemon);
4111 Threads_lock->unlock();
4112 }
4113 // Create thread group and name info from attach arguments
4114 oop group = NULL;
4115 char* thread_name = NULL;
4116 if (args != NULL && Threads::is_supported_jni_version(args->version)) {
4117 group = JNIHandles::resolve(args->group);
4118 thread_name = args->name; // may be NULL
4119 }
4120 if (group == NULL) group = Universe::main_thread_group();
4121
4122 // Create Java level thread object and attach it to this thread
4123 bool attach_failed = false;
4124 {
4125 EXCEPTION_MARK;
4126 HandleMark hm(THREAD);
4127 Handle thread_group(THREAD, group);
4128 thread->allocate_threadObj(thread_group, thread_name, daemon, THREAD);
4129 if (HAS_PENDING_EXCEPTION) {
4130 CLEAR_PENDING_EXCEPTION;
4131 // cleanup outside the handle mark.
4132 attach_failed = true;
4133 }
4134 }
4135
4136 if (attach_failed) {
4137 // Added missing cleanup
4138 thread->cleanup_failed_attach_current_thread();
4139 return JNI_ERR;
4140 }
4141
4142 // mark the thread as no longer attaching
4143 // this uses a fence to push the change through so we don't have
4144 // to regrab the threads_lock
4145 thread->set_done_attaching_via_jni();
4146
4147 // Set java thread status.
4148 java_lang_Thread::set_thread_status(thread->threadObj(),
4149 java_lang_Thread::RUNNABLE);
4150
4151 // Notify the debugger
4152 if (JvmtiExport::should_post_thread_life()) {
4153 JvmtiExport::post_thread_start(thread);
4154 }
4155
4156 EventThreadStart event;
4157 if (event.should_commit()) {
4158 event.set_javalangthread(java_lang_Thread::thread_id(thread->threadObj()));
4159 event.commit();
4160 }
4161
4162 *(JNIEnv**)penv = thread->jni_environment();
4163
4164 // Now leaving the VM, so change thread_state. This is normally automatically taken care
4165 // of in the JVM_ENTRY. But in this situation we have to do it manually. Notice, that by
4166 // using ThreadStateTransition::transition, we do a callback to the safepoint code if
4167 // needed.
4168
4169 ThreadStateTransition::transition_and_fence(thread, _thread_in_vm, _thread_in_native);
4170
4171 // Perform any platform dependent FPU setup
4172 os::setup_fpu();
4173
4174 return JNI_OK;
4175 }
4176
4177
4178 jint JNICALL jni_AttachCurrentThread(JavaVM *vm, void **penv, void *_args) {
4179 HOTSPOT_JNI_ATTACHCURRENTTHREAD_ENTRY(vm, penv, _args);
4180 if (!vm_created) {
4181 HOTSPOT_JNI_ATTACHCURRENTTHREAD_RETURN((uint32_t) JNI_ERR);
4182 return JNI_ERR;
4183 }
4184
4185 JNIWrapper("AttachCurrentThread");
4186 jint ret = attach_current_thread(vm, penv, _args, false);
4187 HOTSPOT_JNI_ATTACHCURRENTTHREAD_RETURN(ret);
4188 return ret;
4189 }
4190
4191
4192 jint JNICALL jni_DetachCurrentThread(JavaVM *vm) {
4193 HOTSPOT_JNI_DETACHCURRENTTHREAD_ENTRY(vm);
4194 VM_Exit::block_if_vm_exited();
4195
4196 JNIWrapper("DetachCurrentThread");
4197
4198 // If the thread has already been detached the operation is a no-op
4199 if (Thread::current_or_null() == NULL) {
4200 HOTSPOT_JNI_DETACHCURRENTTHREAD_RETURN(JNI_OK);
4201 return JNI_OK;
4202 }
4203
4204 JavaThread* thread = JavaThread::current();
4205 if (thread->has_last_Java_frame()) {
4206 HOTSPOT_JNI_DETACHCURRENTTHREAD_RETURN((uint32_t) JNI_ERR);
4207 // Can't detach a thread that's running java, that can't work.
4208 return JNI_ERR;
4209 }
4210
4211 // Safepoint support. Have to do call-back to safepoint code, if in the
4212 // middel of a safepoint operation
4213 ThreadStateTransition::transition_from_native(thread, _thread_in_vm);
4214
4215 // XXX: Note that JavaThread::exit() call below removes the guards on the
4216 // stack pages set up via enable_stack_{red,yellow}_zone() calls
4217 // above in jni_AttachCurrentThread. Unfortunately, while the setting
4218 // of the guards is visible in jni_AttachCurrentThread above,
4219 // the removal of the guards is buried below in JavaThread::exit()
4220 // here. The abstraction should be more symmetrically either exposed
4221 // or hidden (e.g. it could probably be hidden in the same
4222 // (platform-dependent) methods where we do alternate stack
4223 // maintenance work?)
4224 thread->exit(false, JavaThread::jni_detach);
4225 delete thread;
4226
4227 HOTSPOT_JNI_DETACHCURRENTTHREAD_RETURN(JNI_OK);
4228 return JNI_OK;
4229 }
4230
4231 DT_RETURN_MARK_DECL(GetEnv, jint
4232 , HOTSPOT_JNI_GETENV_RETURN(_ret_ref));
4233
4234 jint JNICALL jni_GetEnv(JavaVM *vm, void **penv, jint version) {
4235 HOTSPOT_JNI_GETENV_ENTRY(vm, penv, version);
4236 jint ret = JNI_ERR;
4237 DT_RETURN_MARK(GetEnv, jint, (const jint&)ret);
4238
4239 if (!vm_created) {
4240 *penv = NULL;
4241 ret = JNI_EDETACHED;
4242 return ret;
4243 }
4244
4245 if (JniExportedInterface::GetExportedInterface(vm, penv, version, &ret)) {
4246 return ret;
4247 }
4248
4249 #ifndef JVMPI_VERSION_1
4250 // need these in order to be polite about older agents
4251 #define JVMPI_VERSION_1 ((jint)0x10000001)
4252 #define JVMPI_VERSION_1_1 ((jint)0x10000002)
4253 #define JVMPI_VERSION_1_2 ((jint)0x10000003)
4254 #endif // !JVMPI_VERSION_1
4255
4256 Thread* thread = Thread::current_or_null();
4257 if (thread != NULL && thread->is_Java_thread()) {
4258 if (Threads::is_supported_jni_version_including_1_1(version)) {
4259 *(JNIEnv**)penv = ((JavaThread*) thread)->jni_environment();
4260 ret = JNI_OK;
4261 return ret;
4262
4263 } else if (version == JVMPI_VERSION_1 ||
4264 version == JVMPI_VERSION_1_1 ||
4265 version == JVMPI_VERSION_1_2) {
4266 tty->print_cr("ERROR: JVMPI, an experimental interface, is no longer supported.");
4267 tty->print_cr("Please use the supported interface: the JVM Tool Interface (JVM TI).");
4268 ret = JNI_EVERSION;
4269 return ret;
4270 } else if (JvmtiExport::is_jvmdi_version(version)) {
4271 tty->print_cr("FATAL ERROR: JVMDI is no longer supported.");
4272 tty->print_cr("Please use the supported interface: the JVM Tool Interface (JVM TI).");
4273 ret = JNI_EVERSION;
4274 return ret;
4275 } else {
4276 *penv = NULL;
4277 ret = JNI_EVERSION;
4278 return ret;
4279 }
4280 } else {
4281 *penv = NULL;
4282 ret = JNI_EDETACHED;
4283 return ret;
4284 }
4285 }
4286
4287
4288 jint JNICALL jni_AttachCurrentThreadAsDaemon(JavaVM *vm, void **penv, void *_args) {
4289 HOTSPOT_JNI_ATTACHCURRENTTHREADASDAEMON_ENTRY(vm, penv, _args);
4290 if (!vm_created) {
4291 HOTSPOT_JNI_ATTACHCURRENTTHREADASDAEMON_RETURN((uint32_t) JNI_ERR);
4292 return JNI_ERR;
4293 }
4294
4295 JNIWrapper("AttachCurrentThreadAsDaemon");
4296 jint ret = attach_current_thread(vm, penv, _args, true);
4297 HOTSPOT_JNI_ATTACHCURRENTTHREADASDAEMON_RETURN(ret);
4298 return ret;
4299 }
4300
4301
4302 } // End extern "C"
4303
4304 const struct JNIInvokeInterface_ jni_InvokeInterface = {
4305 NULL,
4306 NULL,
4307 NULL,
4308
4309 jni_DestroyJavaVM,
4310 jni_AttachCurrentThread,
4311 jni_DetachCurrentThread,
4312 jni_GetEnv,
4313 jni_AttachCurrentThreadAsDaemon
4314 };