1 /*
2 * Copyright (c) 1997, 2019, Oracle and/or its affiliates. All rights reserved.
3 * Copyright (c) 2012 Red Hat, Inc.
4 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
5 *
6 * This code is free software; you can redistribute it and/or modify it
7 * under the terms of the GNU General Public License version 2 only, as
8 * published by the Free Software Foundation.
9 *
10 * This code is distributed in the hope that it will be useful, but WITHOUT
11 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
12 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
13 * version 2 for more details (a copy is included in the LICENSE file that
14 * accompanied this code).
15 *
16 * You should have received a copy of the GNU General Public License version
17 * 2 along with this work; if not, write to the Free Software Foundation,
18 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
19 *
20 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
21 * or visit www.oracle.com if you need additional information or have any
22 * questions.
23 *
24 */
25
26 #include "precompiled.hpp"
27 #include "jni.h"
28 #include "jvm.h"
29 #include "ci/ciReplay.hpp"
30 #include "classfile/altHashing.hpp"
31 #include "classfile/classFileStream.hpp"
32 #include "classfile/classLoader.hpp"
33 #include "classfile/javaClasses.hpp"
34 #include "classfile/javaClasses.inline.hpp"
35 #include "classfile/modules.hpp"
36 #include "classfile/symbolTable.hpp"
37 #include "classfile/systemDictionary.hpp"
38 #include "classfile/vmSymbols.hpp"
39 #include "gc/shared/gcLocker.inline.hpp"
40 #include "interpreter/linkResolver.hpp"
41 #include "jfr/jfrEvents.hpp"
42 #include "jfr/support/jfrThreadId.hpp"
43 #include "logging/log.hpp"
44 #include "memory/allocation.hpp"
45 #include "memory/allocation.inline.hpp"
46 #include "memory/oopFactory.hpp"
47 #include "memory/resourceArea.hpp"
48 #include "memory/universe.hpp"
49 #include "oops/access.inline.hpp"
50 #include "oops/arrayOop.inline.hpp"
51 #include "oops/instanceKlass.hpp"
52 #include "oops/instanceOop.hpp"
53 #include "oops/markOop.hpp"
54 #include "oops/method.hpp"
55 #include "oops/objArrayKlass.hpp"
56 #include "oops/objArrayOop.inline.hpp"
57 #include "oops/oop.inline.hpp"
58 #include "oops/symbol.hpp"
59 #include "oops/typeArrayKlass.hpp"
60 #include "oops/typeArrayOop.inline.hpp"
61 #include "prims/jniCheck.hpp"
62 #include "prims/jniExport.hpp"
63 #include "prims/jniFastGetField.hpp"
64 #include "prims/jvm_misc.hpp"
65 #include "prims/jvmtiExport.hpp"
66 #include "prims/jvmtiThreadState.hpp"
67 #include "runtime/atomic.hpp"
68 #include "runtime/compilationPolicy.hpp"
69 #include "runtime/fieldDescriptor.inline.hpp"
70 #include "runtime/handles.inline.hpp"
71 #include "runtime/interfaceSupport.inline.hpp"
72 #include "runtime/java.hpp"
73 #include "runtime/javaCalls.hpp"
74 #include "runtime/jfieldIDWorkaround.hpp"
75 #include "runtime/jniHandles.inline.hpp"
76 #include "runtime/orderAccess.hpp"
77 #include "runtime/reflection.hpp"
78 #include "runtime/safepointVerifiers.hpp"
79 #include "runtime/sharedRuntime.hpp"
80 #include "runtime/signature.hpp"
81 #include "runtime/thread.inline.hpp"
82 #include "runtime/vmOperations.hpp"
83 #include "services/memTracker.hpp"
84 #include "services/runtimeService.hpp"
85 #include "utilities/defaultStream.hpp"
86 #include "utilities/dtrace.hpp"
87 #include "utilities/events.hpp"
88 #include "utilities/histogram.hpp"
89 #include "utilities/macros.hpp"
90 #include "utilities/vmError.hpp"
91 #if INCLUDE_JVMCI
92 #include "jvmci/jvmciCompiler.hpp"
93 #include "jvmci/jvmciRuntime.hpp"
94 #endif
95
96 static jint CurrentVersion = JNI_VERSION_10;
97
98 #ifdef _WIN32
99 extern LONG WINAPI topLevelExceptionFilter(_EXCEPTION_POINTERS* );
100 #endif
101
102 // The DT_RETURN_MARK macros create a scoped object to fire the dtrace
103 // '-return' probe regardless of the return path is taken out of the function.
104 // Methods that have multiple return paths use this to avoid having to
105 // instrument each return path. Methods that use CHECK or THROW must use this
106 // since those macros can cause an immedate uninstrumented return.
107 //
108 // In order to get the return value, a reference to the variable containing
109 // the return value must be passed to the contructor of the object, and
110 // the return value must be set before return (since the mark object has
111 // a reference to it).
112 //
113 // Example:
114 // DT_RETURN_MARK_DECL(SomeFunc, int);
115 // JNI_ENTRY(int, SomeFunc, ...)
116 // int return_value = 0;
117 // DT_RETURN_MARK(SomeFunc, int, (const int&)return_value);
118 // foo(CHECK_0)
119 // return_value = 5;
120 // return return_value;
121 // JNI_END
122 #define DT_RETURN_MARK_DECL(name, type, probe) \
123 DTRACE_ONLY( \
124 class DTraceReturnProbeMark_##name { \
125 public: \
126 const type& _ret_ref; \
127 DTraceReturnProbeMark_##name(const type& v) : _ret_ref(v) {} \
128 ~DTraceReturnProbeMark_##name() { \
129 probe; \
130 } \
131 } \
132 )
133 // Void functions are simpler since there's no return value
134 #define DT_VOID_RETURN_MARK_DECL(name, probe) \
135 DTRACE_ONLY( \
136 class DTraceReturnProbeMark_##name { \
137 public: \
138 ~DTraceReturnProbeMark_##name() { \
139 probe; \
140 } \
141 } \
142 )
143
144 // Place these macros in the function to mark the return. Non-void
145 // functions need the type and address of the return value.
146 #define DT_RETURN_MARK(name, type, ref) \
147 DTRACE_ONLY( DTraceReturnProbeMark_##name dtrace_return_mark(ref) )
148 #define DT_VOID_RETURN_MARK(name) \
149 DTRACE_ONLY( DTraceReturnProbeMark_##name dtrace_return_mark )
150
151
152 // Use these to select distinct code for floating-point vs. non-floating point
153 // situations. Used from within common macros where we need slightly
154 // different behavior for Float/Double
155 #define FP_SELECT_Boolean(intcode, fpcode) intcode
156 #define FP_SELECT_Byte(intcode, fpcode) intcode
157 #define FP_SELECT_Char(intcode, fpcode) intcode
158 #define FP_SELECT_Short(intcode, fpcode) intcode
159 #define FP_SELECT_Object(intcode, fpcode) intcode
160 #define FP_SELECT_Int(intcode, fpcode) intcode
161 #define FP_SELECT_Long(intcode, fpcode) intcode
162 #define FP_SELECT_Float(intcode, fpcode) fpcode
163 #define FP_SELECT_Double(intcode, fpcode) fpcode
164 #define FP_SELECT(TypeName, intcode, fpcode) \
165 FP_SELECT_##TypeName(intcode, fpcode)
166
167 // Choose DT_RETURN_MARK macros based on the type: float/double -> void
168 // (dtrace doesn't do FP yet)
169 #define DT_RETURN_MARK_DECL_FOR(TypeName, name, type, probe) \
170 FP_SELECT(TypeName, \
171 DT_RETURN_MARK_DECL(name, type, probe), DT_VOID_RETURN_MARK_DECL(name, probe) )
172 #define DT_RETURN_MARK_FOR(TypeName, name, type, ref) \
173 FP_SELECT(TypeName, \
174 DT_RETURN_MARK(name, type, ref), DT_VOID_RETURN_MARK(name) )
175
176
177 // out-of-line helpers for class jfieldIDWorkaround:
178
179 bool jfieldIDWorkaround::is_valid_jfieldID(Klass* k, jfieldID id) {
180 if (jfieldIDWorkaround::is_instance_jfieldID(k, id)) {
181 uintptr_t as_uint = (uintptr_t) id;
182 intptr_t offset = raw_instance_offset(id);
183 if (is_checked_jfieldID(id)) {
184 if (!klass_hash_ok(k, id)) {
185 return false;
186 }
187 }
188 return InstanceKlass::cast(k)->contains_field_offset(offset);
189 } else {
190 JNIid* result = (JNIid*) id;
191 #ifdef ASSERT
192 return result != NULL && result->is_static_field_id();
193 #else
194 return result != NULL;
195 #endif
196 }
197 }
198
199
200 intptr_t jfieldIDWorkaround::encode_klass_hash(Klass* k, intptr_t offset) {
201 if (offset <= small_offset_mask) {
202 Klass* field_klass = k;
203 Klass* super_klass = field_klass->super();
204 // With compressed oops the most super class with nonstatic fields would
205 // be the owner of fields embedded in the header.
206 while (InstanceKlass::cast(super_klass)->has_nonstatic_fields() &&
207 InstanceKlass::cast(super_klass)->contains_field_offset(offset)) {
208 field_klass = super_klass; // super contains the field also
209 super_klass = field_klass->super();
210 }
211 debug_only(NoSafepointVerifier nosafepoint;)
212 uintptr_t klass_hash = field_klass->identity_hash();
213 return ((klass_hash & klass_mask) << klass_shift) | checked_mask_in_place;
214 } else {
215 #if 0
216 #ifndef PRODUCT
217 {
218 ResourceMark rm;
219 warning("VerifyJNIFields: long offset %d in %s", offset, k->external_name());
220 }
221 #endif
222 #endif
223 return 0;
224 }
225 }
226
227 bool jfieldIDWorkaround::klass_hash_ok(Klass* k, jfieldID id) {
228 uintptr_t as_uint = (uintptr_t) id;
229 intptr_t klass_hash = (as_uint >> klass_shift) & klass_mask;
230 do {
231 debug_only(NoSafepointVerifier nosafepoint;)
232 // Could use a non-blocking query for identity_hash here...
233 if ((k->identity_hash() & klass_mask) == klass_hash)
234 return true;
235 k = k->super();
236 } while (k != NULL);
237 return false;
238 }
239
240 void jfieldIDWorkaround::verify_instance_jfieldID(Klass* k, jfieldID id) {
241 guarantee(jfieldIDWorkaround::is_instance_jfieldID(k, id), "must be an instance field" );
242 uintptr_t as_uint = (uintptr_t) id;
243 intptr_t offset = raw_instance_offset(id);
244 if (VerifyJNIFields) {
245 if (is_checked_jfieldID(id)) {
246 guarantee(klass_hash_ok(k, id),
247 "Bug in native code: jfieldID class must match object");
248 } else {
249 #if 0
250 #ifndef PRODUCT
251 if (Verbose) {
252 ResourceMark rm;
253 warning("VerifyJNIFields: unverified offset %d for %s", offset, k->external_name());
254 }
255 #endif
256 #endif
257 }
258 }
259 guarantee(InstanceKlass::cast(k)->contains_field_offset(offset),
260 "Bug in native code: jfieldID offset must address interior of object");
261 }
262
263 // Wrapper to trace JNI functions
264
265 #ifdef ASSERT
266 Histogram* JNIHistogram;
267 static volatile int JNIHistogram_lock = 0;
268
269 class JNIHistogramElement : public HistogramElement {
270 public:
271 JNIHistogramElement(const char* name);
272 };
273
274 JNIHistogramElement::JNIHistogramElement(const char* elementName) {
275 _name = elementName;
276 uintx count = 0;
277
278 while (Atomic::cmpxchg(1, &JNIHistogram_lock, 0) != 0) {
279 while (OrderAccess::load_acquire(&JNIHistogram_lock) != 0) {
280 count +=1;
281 if ( (WarnOnStalledSpinLock > 0)
282 && (count % WarnOnStalledSpinLock == 0)) {
283 warning("JNIHistogram_lock seems to be stalled");
284 }
285 }
286 }
287
288
289 if(JNIHistogram == NULL)
290 JNIHistogram = new Histogram("JNI Call Counts",100);
291
292 JNIHistogram->add_element(this);
293 Atomic::dec(&JNIHistogram_lock);
294 }
295
296 #define JNICountWrapper(arg) \
297 static JNIHistogramElement* e = new JNIHistogramElement(arg); \
298 /* There is a MT-race condition in VC++. So we need to make sure that that e has been initialized */ \
299 if (e != NULL) e->increment_count()
300 #define JNIWrapper(arg) JNICountWrapper(arg);
301 #else
302 #define JNIWrapper(arg)
303 #endif
304
305
306 // Implementation of JNI entries
307
308 DT_RETURN_MARK_DECL(DefineClass, jclass
309 , HOTSPOT_JNI_DEFINECLASS_RETURN(_ret_ref));
310
311 JNI_ENTRY(jclass, jni_DefineClass(JNIEnv *env, const char *name, jobject loaderRef,
312 const jbyte *buf, jsize bufLen))
313 JNIWrapper("DefineClass");
314
315 HOTSPOT_JNI_DEFINECLASS_ENTRY(
316 env, (char*) name, loaderRef, (char*) buf, bufLen);
317
318 jclass cls = NULL;
319 DT_RETURN_MARK(DefineClass, jclass, (const jclass&)cls);
320
321 TempNewSymbol class_name = NULL;
322 // Since exceptions can be thrown, class initialization can take place
323 // if name is NULL no check for class name in .class stream has to be made.
324 if (name != NULL) {
325 const int str_len = (int)strlen(name);
326 if (str_len > Symbol::max_length()) {
327 // It's impossible to create this class; the name cannot fit
328 // into the constant pool.
329 Exceptions::fthrow(THREAD_AND_LOCATION,
330 vmSymbols::java_lang_NoClassDefFoundError(),
331 "Class name exceeds maximum length of %d: %s",
332 Symbol::max_length(),
333 name);
334 return 0;
335 }
336 class_name = SymbolTable::new_symbol(name, CHECK_NULL);
337 }
338 ResourceMark rm(THREAD);
339 ClassFileStream st((u1*)buf, bufLen, NULL, ClassFileStream::verify);
340 Handle class_loader (THREAD, JNIHandles::resolve(loaderRef));
341
342 if (UsePerfData && !class_loader.is_null()) {
343 // check whether the current caller thread holds the lock or not.
344 // If not, increment the corresponding counter
345 if (ObjectSynchronizer::
346 query_lock_ownership((JavaThread*)THREAD, class_loader) !=
347 ObjectSynchronizer::owner_self) {
348 ClassLoader::sync_JNIDefineClassLockFreeCounter()->inc();
349 }
350 }
351 Klass* k = SystemDictionary::resolve_from_stream(class_name,
352 class_loader,
353 Handle(),
354 &st,
355 CHECK_NULL);
356
357 if (log_is_enabled(Debug, class, resolve) && k != NULL) {
358 trace_class_resolution(k);
359 }
360
361 cls = (jclass)JNIHandles::make_local(
362 env, k->java_mirror());
363 return cls;
364 JNI_END
365
366
367
368 DT_RETURN_MARK_DECL(FindClass, jclass
369 , HOTSPOT_JNI_FINDCLASS_RETURN(_ret_ref));
370
371 JNI_ENTRY(jclass, jni_FindClass(JNIEnv *env, const char *name))
372 JNIWrapper("FindClass");
373
374 HOTSPOT_JNI_FINDCLASS_ENTRY(env, (char *)name);
375
376 jclass result = NULL;
377 DT_RETURN_MARK(FindClass, jclass, (const jclass&)result);
378
379 // Sanity check the name: it cannot be null or larger than the maximum size
380 // name we can fit in the constant pool.
381 if (name == NULL) {
382 THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), "No class name given");
383 }
384 if ((int)strlen(name) > Symbol::max_length()) {
385 Exceptions::fthrow(THREAD_AND_LOCATION,
386 vmSymbols::java_lang_NoClassDefFoundError(),
387 "Class name exceeds maximum length of %d: %s",
388 Symbol::max_length(),
389 name);
390 return 0;
391 }
392
393 //%note jni_3
394 Handle protection_domain;
395 // Find calling class
396 Klass* k = thread->security_get_caller_class(0);
397 // default to the system loader when no context
398 Handle loader(THREAD, SystemDictionary::java_system_loader());
399 if (k != NULL) {
400 // Special handling to make sure JNI_OnLoad and JNI_OnUnload are executed
401 // in the correct class context.
402 if (k->class_loader() == NULL &&
403 k->name() == vmSymbols::java_lang_ClassLoader_NativeLibrary()) {
404 JavaValue result(T_OBJECT);
405 JavaCalls::call_static(&result, k,
406 vmSymbols::getFromClass_name(),
407 vmSymbols::void_class_signature(),
408 CHECK_NULL);
409 // When invoked from JNI_OnLoad, NativeLibrary::getFromClass returns
410 // a non-NULL Class object. When invoked from JNI_OnUnload,
411 // it will return NULL to indicate no context.
412 oop mirror = (oop) result.get_jobject();
413 if (mirror != NULL) {
414 Klass* fromClass = java_lang_Class::as_Klass(mirror);
415 loader = Handle(THREAD, fromClass->class_loader());
416 protection_domain = Handle(THREAD, fromClass->protection_domain());
417 }
418 } else {
419 loader = Handle(THREAD, k->class_loader());
420 }
421 }
422
423 TempNewSymbol sym = SymbolTable::new_symbol(name, CHECK_NULL);
424 result = find_class_from_class_loader(env, sym, true, loader,
425 protection_domain, true, thread);
426
427 if (log_is_enabled(Debug, class, resolve) && result != NULL) {
428 trace_class_resolution(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(result)));
429 }
430
431 return result;
432 JNI_END
433
434 DT_RETURN_MARK_DECL(FromReflectedMethod, jmethodID
435 , HOTSPOT_JNI_FROMREFLECTEDMETHOD_RETURN((uintptr_t)_ret_ref));
436
437 JNI_ENTRY(jmethodID, jni_FromReflectedMethod(JNIEnv *env, jobject method))
438 JNIWrapper("FromReflectedMethod");
439
440 HOTSPOT_JNI_FROMREFLECTEDMETHOD_ENTRY(env, method);
441
442 jmethodID ret = NULL;
443 DT_RETURN_MARK(FromReflectedMethod, jmethodID, (const jmethodID&)ret);
444
445 // method is a handle to a java.lang.reflect.Method object
446 oop reflected = JNIHandles::resolve_non_null(method);
447 oop mirror = NULL;
448 int slot = 0;
449
450 if (reflected->klass() == SystemDictionary::reflect_Constructor_klass()) {
451 mirror = java_lang_reflect_Constructor::clazz(reflected);
452 slot = java_lang_reflect_Constructor::slot(reflected);
453 } else {
454 assert(reflected->klass() == SystemDictionary::reflect_Method_klass(), "wrong type");
455 mirror = java_lang_reflect_Method::clazz(reflected);
456 slot = java_lang_reflect_Method::slot(reflected);
457 }
458 Klass* k1 = java_lang_Class::as_Klass(mirror);
459
460 // Make sure class is initialized before handing id's out to methods
461 k1->initialize(CHECK_NULL);
462 Method* m = InstanceKlass::cast(k1)->method_with_idnum(slot);
463 ret = m==NULL? NULL : m->jmethod_id(); // return NULL if reflected method deleted
464 return ret;
465 JNI_END
466
467 DT_RETURN_MARK_DECL(FromReflectedField, jfieldID
468 , HOTSPOT_JNI_FROMREFLECTEDFIELD_RETURN((uintptr_t)_ret_ref));
469
470 JNI_ENTRY(jfieldID, jni_FromReflectedField(JNIEnv *env, jobject field))
471 JNIWrapper("FromReflectedField");
472
473 HOTSPOT_JNI_FROMREFLECTEDFIELD_ENTRY(env, field);
474
475 jfieldID ret = NULL;
476 DT_RETURN_MARK(FromReflectedField, jfieldID, (const jfieldID&)ret);
477
478 // field is a handle to a java.lang.reflect.Field object
479 oop reflected = JNIHandles::resolve_non_null(field);
480 oop mirror = java_lang_reflect_Field::clazz(reflected);
481 Klass* k1 = java_lang_Class::as_Klass(mirror);
482 int slot = java_lang_reflect_Field::slot(reflected);
483 int modifiers = java_lang_reflect_Field::modifiers(reflected);
484
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 = oopDesc::equals(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 SystemDictionary::Throwable_klass(),
679 vmSymbols::printStackTrace_name(),
680 vmSymbols::void_method_signature(),
681 THREAD);
682 // If an exception is thrown in the call it gets thrown away. Not much
683 // we can do with it. The native code that calls this, does not check
684 // for the exception - hence, it might still be in the thread when DestroyVM gets
685 // called, potentially causing a few asserts to trigger - since no pending exception
686 // is expected.
687 CLEAR_PENDING_EXCEPTION;
688 } else {
689 ResourceMark rm(THREAD);
690 jio_fprintf(defaultStream::error_stream(),
691 ". Uncaught exception of type %s.",
692 ex->klass()->external_name());
693 }
694 }
695 }
696
697 HOTSPOT_JNI_EXCEPTIONDESCRIBE_RETURN();
698 JNI_END
699
700
701 JNI_QUICK_ENTRY(void, jni_ExceptionClear(JNIEnv *env))
702 JNIWrapper("ExceptionClear");
703
704 HOTSPOT_JNI_EXCEPTIONCLEAR_ENTRY(env);
705
706 // The jni code might be using this API to clear java thrown exception.
707 // So just mark jvmti thread exception state as exception caught.
708 JvmtiThreadState *state = JavaThread::current()->jvmti_thread_state();
709 if (state != NULL && state->is_exception_detected()) {
710 state->set_exception_caught();
711 }
712 thread->clear_pending_exception();
713
714 HOTSPOT_JNI_EXCEPTIONCLEAR_RETURN();
715 JNI_END
716
717
718 JNI_ENTRY(void, jni_FatalError(JNIEnv *env, const char *msg))
719 JNIWrapper("FatalError");
720
721 HOTSPOT_JNI_FATALERROR_ENTRY(env, (char *) msg);
722
723 tty->print_cr("FATAL ERROR in native method: %s", msg);
724 thread->print_stack();
725 os::abort(); // Dump core and abort
726 JNI_END
727
728
729 JNI_ENTRY(jint, jni_PushLocalFrame(JNIEnv *env, jint capacity))
730 JNIWrapper("PushLocalFrame");
731
732 HOTSPOT_JNI_PUSHLOCALFRAME_ENTRY(env, capacity);
733
734 //%note jni_11
735 if (capacity < 0 ||
736 ((MaxJNILocalCapacity > 0) && (capacity > MaxJNILocalCapacity))) {
737 HOTSPOT_JNI_PUSHLOCALFRAME_RETURN((uint32_t)JNI_ERR);
738 return JNI_ERR;
739 }
740 JNIHandleBlock* old_handles = thread->active_handles();
741 JNIHandleBlock* new_handles = JNIHandleBlock::allocate_block(thread);
742 assert(new_handles != NULL, "should not be NULL");
743 new_handles->set_pop_frame_link(old_handles);
744 thread->set_active_handles(new_handles);
745 jint ret = JNI_OK;
746 HOTSPOT_JNI_PUSHLOCALFRAME_RETURN(ret);
747 return ret;
748 JNI_END
749
750
751 JNI_ENTRY(jobject, jni_PopLocalFrame(JNIEnv *env, jobject result))
752 JNIWrapper("PopLocalFrame");
753
754 HOTSPOT_JNI_POPLOCALFRAME_ENTRY(env, result);
755
756 //%note jni_11
757 Handle result_handle(thread, JNIHandles::resolve(result));
758 JNIHandleBlock* old_handles = thread->active_handles();
759 JNIHandleBlock* new_handles = old_handles->pop_frame_link();
760 if (new_handles != NULL) {
761 // As a sanity check we only release the handle blocks if the pop_frame_link is not NULL.
762 // This way code will still work if PopLocalFrame is called without a corresponding
763 // PushLocalFrame call. Note that we set the pop_frame_link to NULL explicitly, otherwise
764 // the release_block call will release the blocks.
765 thread->set_active_handles(new_handles);
766 old_handles->set_pop_frame_link(NULL); // clear link we won't release new_handles below
767 JNIHandleBlock::release_block(old_handles, thread); // may block
768 result = JNIHandles::make_local(thread, result_handle());
769 }
770 HOTSPOT_JNI_POPLOCALFRAME_RETURN(result);
771 return result;
772 JNI_END
773
774
775 JNI_ENTRY(jobject, jni_NewGlobalRef(JNIEnv *env, jobject ref))
776 JNIWrapper("NewGlobalRef");
777
778 HOTSPOT_JNI_NEWGLOBALREF_ENTRY(env, ref);
779
780 Handle ref_handle(thread, JNIHandles::resolve(ref));
781 jobject ret = JNIHandles::make_global(ref_handle);
782
783 HOTSPOT_JNI_NEWGLOBALREF_RETURN(ret);
784 return ret;
785 JNI_END
786
787 // Must be JNI_ENTRY (with HandleMark)
788 JNI_ENTRY_NO_PRESERVE(void, jni_DeleteGlobalRef(JNIEnv *env, jobject ref))
789 JNIWrapper("DeleteGlobalRef");
790
791 HOTSPOT_JNI_DELETEGLOBALREF_ENTRY(env, ref);
792
793 JNIHandles::destroy_global(ref);
794
795 HOTSPOT_JNI_DELETEGLOBALREF_RETURN();
796 JNI_END
797
798 JNI_QUICK_ENTRY(void, jni_DeleteLocalRef(JNIEnv *env, jobject obj))
799 JNIWrapper("DeleteLocalRef");
800
801 HOTSPOT_JNI_DELETELOCALREF_ENTRY(env, obj);
802
803 JNIHandles::destroy_local(obj);
804
805 HOTSPOT_JNI_DELETELOCALREF_RETURN();
806 JNI_END
807
808 JNI_QUICK_ENTRY(jboolean, jni_IsSameObject(JNIEnv *env, jobject r1, jobject r2))
809 JNIWrapper("IsSameObject");
810
811 HOTSPOT_JNI_ISSAMEOBJECT_ENTRY(env, r1, r2);
812
813 jboolean ret = JNIHandles::is_same_object(r1, r2) ? JNI_TRUE : JNI_FALSE;
814
815 HOTSPOT_JNI_ISSAMEOBJECT_RETURN(ret);
816 return ret;
817 JNI_END
818
819
820 JNI_ENTRY(jobject, jni_NewLocalRef(JNIEnv *env, jobject ref))
821 JNIWrapper("NewLocalRef");
822
823 HOTSPOT_JNI_NEWLOCALREF_ENTRY(env, ref);
824
825 jobject ret = JNIHandles::make_local(env, JNIHandles::resolve(ref));
826
827 HOTSPOT_JNI_NEWLOCALREF_RETURN(ret);
828 return ret;
829 JNI_END
830
831 JNI_LEAF(jint, jni_EnsureLocalCapacity(JNIEnv *env, jint capacity))
832 JNIWrapper("EnsureLocalCapacity");
833
834 HOTSPOT_JNI_ENSURELOCALCAPACITY_ENTRY(env, capacity);
835
836 jint ret;
837 if (capacity >= 0 &&
838 ((MaxJNILocalCapacity <= 0) || (capacity <= MaxJNILocalCapacity))) {
839 ret = JNI_OK;
840 } else {
841 ret = JNI_ERR;
842 }
843
844 HOTSPOT_JNI_ENSURELOCALCAPACITY_RETURN(ret);
845 return ret;
846 JNI_END
847
848 // Return the Handle Type
849 JNI_LEAF(jobjectRefType, jni_GetObjectRefType(JNIEnv *env, jobject obj))
850 JNIWrapper("GetObjectRefType");
851
852 HOTSPOT_JNI_GETOBJECTREFTYPE_ENTRY(env, obj);
853
854 jobjectRefType ret = JNIInvalidRefType;
855 if (obj != NULL) {
856 ret = JNIHandles::handle_type(thread, obj);
857 }
858
859 HOTSPOT_JNI_GETOBJECTREFTYPE_RETURN((void *) ret);
860 return ret;
861 JNI_END
862
863
864 class JNI_ArgumentPusher : public SignatureIterator {
865 protected:
866 JavaCallArguments* _arguments;
867
868 virtual void get_bool () = 0;
869 virtual void get_char () = 0;
870 virtual void get_short () = 0;
871 virtual void get_byte () = 0;
872 virtual void get_int () = 0;
873 virtual void get_long () = 0;
874 virtual void get_float () = 0;
875 virtual void get_double () = 0;
876 virtual void get_object () = 0;
877
878 JNI_ArgumentPusher(Symbol* signature) : SignatureIterator(signature) {
879 this->_return_type = T_ILLEGAL;
880 _arguments = NULL;
881 }
882
883 public:
884 virtual void iterate( uint64_t fingerprint ) = 0;
885
886 void set_java_argument_object(JavaCallArguments *arguments) { _arguments = arguments; }
887
888 inline void do_bool() { if (!is_return_type()) get_bool(); }
889 inline void do_char() { if (!is_return_type()) get_char(); }
890 inline void do_short() { if (!is_return_type()) get_short(); }
891 inline void do_byte() { if (!is_return_type()) get_byte(); }
892 inline void do_int() { if (!is_return_type()) get_int(); }
893 inline void do_long() { if (!is_return_type()) get_long(); }
894 inline void do_float() { if (!is_return_type()) get_float(); }
895 inline void do_double() { if (!is_return_type()) get_double(); }
896 inline void do_object(int begin, int end) { if (!is_return_type()) get_object(); }
897 inline void do_array(int begin, int end) { if (!is_return_type()) get_object(); } // do_array uses get_object -- there is no get_array
898 inline void do_void() { }
899
900 JavaCallArguments* arguments() { return _arguments; }
901 void push_receiver(Handle h) { _arguments->push_oop(h); }
902 };
903
904
905 class JNI_ArgumentPusherVaArg : public JNI_ArgumentPusher {
906 protected:
907 va_list _ap;
908
909 inline void get_bool() {
910 // Normalize boolean arguments from native code by converting 1-255 to JNI_TRUE and
911 // 0 to JNI_FALSE. Boolean return values from native are normalized the same in
912 // TemplateInterpreterGenerator::generate_result_handler_for and
913 // SharedRuntime::generate_native_wrapper.
914 jboolean b = va_arg(_ap, jint);
915 _arguments->push_int((jint)(b == 0 ? JNI_FALSE : JNI_TRUE));
916 }
917 inline void get_char() { _arguments->push_int(va_arg(_ap, jint)); } // char is coerced to int when using va_arg
918 inline void get_short() { _arguments->push_int(va_arg(_ap, jint)); } // short is coerced to int when using va_arg
919 inline void get_byte() { _arguments->push_int(va_arg(_ap, jint)); } // byte is coerced to int when using va_arg
920 inline void get_int() { _arguments->push_int(va_arg(_ap, jint)); }
921
922 // each of these paths is exercized by the various jck Call[Static,Nonvirtual,][Void,Int,..]Method[A,V,] tests
923
924 inline void get_long() { _arguments->push_long(va_arg(_ap, jlong)); }
925 inline void get_float() { _arguments->push_float((jfloat)va_arg(_ap, jdouble)); } // float is coerced to double w/ va_arg
926 inline void get_double() { _arguments->push_double(va_arg(_ap, jdouble)); }
927 inline void get_object() { _arguments->push_jobject(va_arg(_ap, jobject)); }
928
929 inline void set_ap(va_list rap) {
930 va_copy(_ap, rap);
931 }
932
933 public:
934 JNI_ArgumentPusherVaArg(Symbol* signature, va_list rap)
935 : JNI_ArgumentPusher(signature) {
936 set_ap(rap);
937 }
938 JNI_ArgumentPusherVaArg(jmethodID method_id, va_list rap)
939 : JNI_ArgumentPusher(Method::resolve_jmethod_id(method_id)->signature()) {
940 set_ap(rap);
941 }
942
943 // Optimized path if we have the bitvector form of signature
944 void iterate( uint64_t fingerprint ) {
945 if (fingerprint == (uint64_t)CONST64(-1)) {
946 SignatureIterator::iterate(); // Must be too many arguments
947 } else {
948 _return_type = (BasicType)((fingerprint >> static_feature_size) &
949 result_feature_mask);
950
951 assert(fingerprint, "Fingerprint should not be 0");
952 fingerprint = fingerprint >> (static_feature_size + result_feature_size);
953 while ( 1 ) {
954 switch ( fingerprint & parameter_feature_mask ) {
955 case bool_parm:
956 get_bool();
957 break;
958 case char_parm:
959 get_char();
960 break;
961 case short_parm:
962 get_short();
963 break;
964 case byte_parm:
965 get_byte();
966 break;
967 case int_parm:
968 get_int();
969 break;
970 case obj_parm:
971 get_object();
972 break;
973 case long_parm:
974 get_long();
975 break;
976 case float_parm:
977 get_float();
978 break;
979 case double_parm:
980 get_double();
981 break;
982 case done_parm:
983 return;
984 break;
985 default:
986 ShouldNotReachHere();
987 break;
988 }
989 fingerprint >>= parameter_feature_size;
990 }
991 }
992 }
993 };
994
995
996 class JNI_ArgumentPusherArray : public JNI_ArgumentPusher {
997 protected:
998 const jvalue *_ap;
999
1000 inline void get_bool() {
1001 // Normalize boolean arguments from native code by converting 1-255 to JNI_TRUE and
1002 // 0 to JNI_FALSE. Boolean return values from native are normalized the same in
1003 // TemplateInterpreterGenerator::generate_result_handler_for and
1004 // SharedRuntime::generate_native_wrapper.
1005 jboolean b = (_ap++)->z;
1006 _arguments->push_int((jint)(b == 0 ? JNI_FALSE : JNI_TRUE));
1007 }
1008 inline void get_char() { _arguments->push_int((jint)(_ap++)->c); }
1009 inline void get_short() { _arguments->push_int((jint)(_ap++)->s); }
1010 inline void get_byte() { _arguments->push_int((jint)(_ap++)->b); }
1011 inline void get_int() { _arguments->push_int((jint)(_ap++)->i); }
1012
1013 inline void get_long() { _arguments->push_long((_ap++)->j); }
1014 inline void get_float() { _arguments->push_float((_ap++)->f); }
1015 inline void get_double() { _arguments->push_double((_ap++)->d);}
1016 inline void get_object() { _arguments->push_jobject((_ap++)->l); }
1017
1018 inline void set_ap(const jvalue *rap) { _ap = rap; }
1019
1020 public:
1021 JNI_ArgumentPusherArray(Symbol* signature, const jvalue *rap)
1022 : JNI_ArgumentPusher(signature) {
1023 set_ap(rap);
1024 }
1025 JNI_ArgumentPusherArray(jmethodID method_id, const jvalue *rap)
1026 : JNI_ArgumentPusher(Method::resolve_jmethod_id(method_id)->signature()) {
1027 set_ap(rap);
1028 }
1029
1030 // Optimized path if we have the bitvector form of signature
1031 void iterate( uint64_t fingerprint ) {
1032 if (fingerprint == (uint64_t)CONST64(-1)) {
1033 SignatureIterator::iterate(); // Must be too many arguments
1034 } else {
1035 _return_type = (BasicType)((fingerprint >> static_feature_size) &
1036 result_feature_mask);
1037 assert(fingerprint, "Fingerprint should not be 0");
1038 fingerprint = fingerprint >> (static_feature_size + result_feature_size);
1039 while ( 1 ) {
1040 switch ( fingerprint & parameter_feature_mask ) {
1041 case bool_parm:
1042 get_bool();
1043 break;
1044 case char_parm:
1045 get_char();
1046 break;
1047 case short_parm:
1048 get_short();
1049 break;
1050 case byte_parm:
1051 get_byte();
1052 break;
1053 case int_parm:
1054 get_int();
1055 break;
1056 case obj_parm:
1057 get_object();
1058 break;
1059 case long_parm:
1060 get_long();
1061 break;
1062 case float_parm:
1063 get_float();
1064 break;
1065 case double_parm:
1066 get_double();
1067 break;
1068 case done_parm:
1069 return;
1070 break;
1071 default:
1072 ShouldNotReachHere();
1073 break;
1074 }
1075 fingerprint >>= parameter_feature_size;
1076 }
1077 }
1078 }
1079 };
1080
1081
1082 enum JNICallType {
1083 JNI_STATIC,
1084 JNI_VIRTUAL,
1085 JNI_NONVIRTUAL
1086 };
1087
1088
1089
1090 static void jni_invoke_static(JNIEnv *env, JavaValue* result, jobject receiver, JNICallType call_type, jmethodID method_id, JNI_ArgumentPusher *args, TRAPS) {
1091 methodHandle method(THREAD, Method::resolve_jmethod_id(method_id));
1092
1093 // Create object to hold arguments for the JavaCall, and associate it with
1094 // the jni parser
1095 ResourceMark rm(THREAD);
1096 int number_of_parameters = method->size_of_parameters();
1097 JavaCallArguments java_args(number_of_parameters);
1098 args->set_java_argument_object(&java_args);
1099
1100 assert(method->is_static(), "method should be static");
1101
1102 // Fill out JavaCallArguments object
1103 args->iterate( Fingerprinter(method).fingerprint() );
1104 // Initialize result type
1105 result->set_type(args->get_ret_type());
1106
1107 // Invoke the method. Result is returned as oop.
1108 JavaCalls::call(result, method, &java_args, CHECK);
1109
1110 // Convert result
1111 if (result->get_type() == T_OBJECT || result->get_type() == T_ARRAY) {
1112 result->set_jobject(JNIHandles::make_local(env, (oop) result->get_jobject()));
1113 }
1114 }
1115
1116
1117 static void jni_invoke_nonstatic(JNIEnv *env, JavaValue* result, jobject receiver, JNICallType call_type, jmethodID method_id, JNI_ArgumentPusher *args, TRAPS) {
1118 oop recv = JNIHandles::resolve(receiver);
1119 if (recv == NULL) {
1120 THROW(vmSymbols::java_lang_NullPointerException());
1121 }
1122 Handle h_recv(THREAD, recv);
1123
1124 int number_of_parameters;
1125 Method* selected_method;
1126 {
1127 Method* m = Method::resolve_jmethod_id(method_id);
1128 number_of_parameters = m->size_of_parameters();
1129 Klass* holder = m->method_holder();
1130 if (call_type != JNI_VIRTUAL) {
1131 selected_method = m;
1132 } else if (!m->has_itable_index()) {
1133 // non-interface call -- for that little speed boost, don't handlize
1134 debug_only(NoSafepointVerifier nosafepoint;)
1135 // jni_GetMethodID makes sure class is linked and initialized
1136 // so m should have a valid vtable index.
1137 assert(m->valid_vtable_index(), "no valid vtable index");
1138 int vtbl_index = m->vtable_index();
1139 if (vtbl_index != Method::nonvirtual_vtable_index) {
1140 selected_method = h_recv->klass()->method_at_vtable(vtbl_index);
1141 } else {
1142 // final method
1143 selected_method = m;
1144 }
1145 } else {
1146 // interface call
1147 int itbl_index = m->itable_index();
1148 Klass* k = h_recv->klass();
1149 selected_method = InstanceKlass::cast(k)->method_at_itable(holder, itbl_index, CHECK);
1150 }
1151 }
1152
1153 methodHandle method(THREAD, selected_method);
1154
1155 // Create object to hold arguments for the JavaCall, and associate it with
1156 // the jni parser
1157 ResourceMark rm(THREAD);
1158 JavaCallArguments java_args(number_of_parameters);
1159 args->set_java_argument_object(&java_args);
1160
1161 // handle arguments
1162 assert(!method->is_static(), "method %s should not be static", method->name_and_sig_as_C_string());
1163 args->push_receiver(h_recv); // Push jobject handle
1164
1165 // Fill out JavaCallArguments object
1166 args->iterate( Fingerprinter(method).fingerprint() );
1167 // Initialize result type
1168 result->set_type(args->get_ret_type());
1169
1170 // Invoke the method. Result is returned as oop.
1171 JavaCalls::call(result, method, &java_args, CHECK);
1172
1173 // Convert result
1174 if (result->get_type() == T_OBJECT || result->get_type() == T_ARRAY) {
1175 result->set_jobject(JNIHandles::make_local(env, (oop) result->get_jobject()));
1176 }
1177 }
1178
1179
1180 static instanceOop alloc_object(jclass clazz, TRAPS) {
1181 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz));
1182 if (k == NULL) {
1183 ResourceMark rm(THREAD);
1184 THROW_(vmSymbols::java_lang_InstantiationException(), NULL);
1185 }
1186 k->check_valid_for_instantiation(false, CHECK_NULL);
1187 k->initialize(CHECK_NULL);
1188 instanceOop ih = InstanceKlass::cast(k)->allocate_instance(THREAD);
1189 return ih;
1190 }
1191
1192 DT_RETURN_MARK_DECL(AllocObject, jobject
1193 , HOTSPOT_JNI_ALLOCOBJECT_RETURN(_ret_ref));
1194
1195 JNI_ENTRY(jobject, jni_AllocObject(JNIEnv *env, jclass clazz))
1196 JNIWrapper("AllocObject");
1197
1198 HOTSPOT_JNI_ALLOCOBJECT_ENTRY(env, clazz);
1199
1200 jobject ret = NULL;
1201 DT_RETURN_MARK(AllocObject, jobject, (const jobject&)ret);
1202
1203 instanceOop i = alloc_object(clazz, CHECK_NULL);
1204 ret = JNIHandles::make_local(env, i);
1205 return ret;
1206 JNI_END
1207
1208 DT_RETURN_MARK_DECL(NewObjectA, jobject
1209 , HOTSPOT_JNI_NEWOBJECTA_RETURN(_ret_ref));
1210
1211 JNI_ENTRY(jobject, jni_NewObjectA(JNIEnv *env, jclass clazz, jmethodID methodID, const jvalue *args))
1212 JNIWrapper("NewObjectA");
1213
1214 HOTSPOT_JNI_NEWOBJECTA_ENTRY(env, clazz, (uintptr_t) methodID);
1215
1216 jobject obj = NULL;
1217 DT_RETURN_MARK(NewObjectA, jobject, (const jobject)obj);
1218
1219 instanceOop i = alloc_object(clazz, CHECK_NULL);
1220 obj = JNIHandles::make_local(env, i);
1221 JavaValue jvalue(T_VOID);
1222 JNI_ArgumentPusherArray ap(methodID, args);
1223 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_NULL);
1224 return obj;
1225 JNI_END
1226
1227
1228 DT_RETURN_MARK_DECL(NewObjectV, jobject
1229 , HOTSPOT_JNI_NEWOBJECTV_RETURN(_ret_ref));
1230
1231 JNI_ENTRY(jobject, jni_NewObjectV(JNIEnv *env, jclass clazz, jmethodID methodID, va_list args))
1232 JNIWrapper("NewObjectV");
1233
1234 HOTSPOT_JNI_NEWOBJECTV_ENTRY(env, clazz, (uintptr_t) methodID);
1235
1236 jobject obj = NULL;
1237 DT_RETURN_MARK(NewObjectV, jobject, (const jobject&)obj);
1238
1239 instanceOop i = alloc_object(clazz, CHECK_NULL);
1240 obj = JNIHandles::make_local(env, i);
1241 JavaValue jvalue(T_VOID);
1242 JNI_ArgumentPusherVaArg ap(methodID, args);
1243 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_NULL);
1244 return obj;
1245 JNI_END
1246
1247
1248 DT_RETURN_MARK_DECL(NewObject, jobject
1249 , HOTSPOT_JNI_NEWOBJECT_RETURN(_ret_ref));
1250
1251 JNI_ENTRY(jobject, jni_NewObject(JNIEnv *env, jclass clazz, jmethodID methodID, ...))
1252 JNIWrapper("NewObject");
1253
1254 HOTSPOT_JNI_NEWOBJECT_ENTRY(env, clazz, (uintptr_t) methodID);
1255
1256 jobject obj = NULL;
1257 DT_RETURN_MARK(NewObject, jobject, (const jobject&)obj);
1258
1259 instanceOop i = alloc_object(clazz, CHECK_NULL);
1260 obj = JNIHandles::make_local(env, i);
1261 va_list args;
1262 va_start(args, methodID);
1263 JavaValue jvalue(T_VOID);
1264 JNI_ArgumentPusherVaArg ap(methodID, args);
1265 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_NULL);
1266 va_end(args);
1267 return obj;
1268 JNI_END
1269
1270
1271 JNI_ENTRY(jclass, jni_GetObjectClass(JNIEnv *env, jobject obj))
1272 JNIWrapper("GetObjectClass");
1273
1274 HOTSPOT_JNI_GETOBJECTCLASS_ENTRY(env, obj);
1275
1276 Klass* k = JNIHandles::resolve_non_null(obj)->klass();
1277 jclass ret =
1278 (jclass) JNIHandles::make_local(env, k->java_mirror());
1279
1280 HOTSPOT_JNI_GETOBJECTCLASS_RETURN(ret);
1281 return ret;
1282 JNI_END
1283
1284 JNI_QUICK_ENTRY(jboolean, jni_IsInstanceOf(JNIEnv *env, jobject obj, jclass clazz))
1285 JNIWrapper("IsInstanceOf");
1286
1287 HOTSPOT_JNI_ISINSTANCEOF_ENTRY(env, obj, clazz);
1288
1289 jboolean ret = JNI_TRUE;
1290 if (obj != NULL) {
1291 ret = JNI_FALSE;
1292 Klass* k = java_lang_Class::as_Klass(
1293 JNIHandles::resolve_non_null(clazz));
1294 if (k != NULL) {
1295 ret = JNIHandles::resolve_non_null(obj)->is_a(k) ? JNI_TRUE : JNI_FALSE;
1296 }
1297 }
1298
1299 HOTSPOT_JNI_ISINSTANCEOF_RETURN(ret);
1300 return ret;
1301 JNI_END
1302
1303
1304 static jmethodID get_method_id(JNIEnv *env, jclass clazz, const char *name_str,
1305 const char *sig, bool is_static, TRAPS) {
1306 // %%%% This code should probably just call into a method in the LinkResolver
1307 //
1308 // The class should have been loaded (we have an instance of the class
1309 // passed in) so the method and signature should already be in the symbol
1310 // table. If they're not there, the method doesn't exist.
1311 const char *name_to_probe = (name_str == NULL)
1312 ? vmSymbols::object_initializer_name()->as_C_string()
1313 : name_str;
1314 TempNewSymbol name = SymbolTable::probe(name_to_probe, (int)strlen(name_to_probe));
1315 TempNewSymbol signature = SymbolTable::probe(sig, (int)strlen(sig));
1316
1317 if (name == NULL || signature == NULL) {
1318 THROW_MSG_0(vmSymbols::java_lang_NoSuchMethodError(), name_str);
1319 }
1320
1321 // Throw a NoSuchMethodError exception if we have an instance of a
1322 // primitive java.lang.Class
1323 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(clazz))) {
1324 THROW_MSG_0(vmSymbols::java_lang_NoSuchMethodError(), name_str);
1325 }
1326
1327 Klass* klass = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz));
1328
1329 // Make sure class is linked and initialized before handing id's out to
1330 // Method*s.
1331 klass->initialize(CHECK_NULL);
1332
1333 Method* m;
1334 if (name == vmSymbols::object_initializer_name() ||
1335 name == vmSymbols::class_initializer_name()) {
1336 // Never search superclasses for constructors
1337 if (klass->is_instance_klass()) {
1338 m = InstanceKlass::cast(klass)->find_method(name, signature);
1339 } else {
1340 m = NULL;
1341 }
1342 } else {
1343 m = klass->lookup_method(name, signature);
1344 if (m == NULL && klass->is_instance_klass()) {
1345 m = InstanceKlass::cast(klass)->lookup_method_in_ordered_interfaces(name, signature);
1346 }
1347 }
1348 if (m == NULL || (m->is_static() != is_static)) {
1349 THROW_MSG_0(vmSymbols::java_lang_NoSuchMethodError(), name_str);
1350 }
1351 return m->jmethod_id();
1352 }
1353
1354
1355 JNI_ENTRY(jmethodID, jni_GetMethodID(JNIEnv *env, jclass clazz,
1356 const char *name, const char *sig))
1357 JNIWrapper("GetMethodID");
1358 HOTSPOT_JNI_GETMETHODID_ENTRY(env, clazz, (char *) name, (char *) sig);
1359 jmethodID ret = get_method_id(env, clazz, name, sig, false, thread);
1360 HOTSPOT_JNI_GETMETHODID_RETURN((uintptr_t) ret);
1361 return ret;
1362 JNI_END
1363
1364
1365 JNI_ENTRY(jmethodID, jni_GetStaticMethodID(JNIEnv *env, jclass clazz,
1366 const char *name, const char *sig))
1367 JNIWrapper("GetStaticMethodID");
1368 HOTSPOT_JNI_GETSTATICMETHODID_ENTRY(env, (char *) clazz, (char *) name, (char *)sig);
1369 jmethodID ret = get_method_id(env, clazz, name, sig, true, thread);
1370 HOTSPOT_JNI_GETSTATICMETHODID_RETURN((uintptr_t) ret);
1371 return ret;
1372 JNI_END
1373
1374
1375
1376 //
1377 // Calling Methods
1378 //
1379
1380
1381 #define DEFINE_CALLMETHOD(ResultType, Result, Tag \
1382 , EntryProbe, ReturnProbe) \
1383 \
1384 DT_RETURN_MARK_DECL_FOR(Result, Call##Result##Method, ResultType \
1385 , ReturnProbe); \
1386 \
1387 JNI_ENTRY(ResultType, \
1388 jni_Call##Result##Method(JNIEnv *env, jobject obj, jmethodID methodID, ...)) \
1389 JNIWrapper("Call" XSTR(Result) "Method"); \
1390 \
1391 EntryProbe; \
1392 ResultType ret = 0;\
1393 DT_RETURN_MARK_FOR(Result, Call##Result##Method, ResultType, \
1394 (const ResultType&)ret);\
1395 \
1396 va_list args; \
1397 va_start(args, methodID); \
1398 JavaValue jvalue(Tag); \
1399 JNI_ArgumentPusherVaArg ap(methodID, args); \
1400 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK_0); \
1401 va_end(args); \
1402 ret = jvalue.get_##ResultType(); \
1403 return ret;\
1404 JNI_END
1405
1406 // the runtime type of subword integral basic types is integer
1407 DEFINE_CALLMETHOD(jboolean, Boolean, T_BOOLEAN
1408 , HOTSPOT_JNI_CALLBOOLEANMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1409 HOTSPOT_JNI_CALLBOOLEANMETHOD_RETURN(_ret_ref))
1410 DEFINE_CALLMETHOD(jbyte, Byte, T_BYTE
1411 , HOTSPOT_JNI_CALLBYTEMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1412 HOTSPOT_JNI_CALLBYTEMETHOD_RETURN(_ret_ref))
1413 DEFINE_CALLMETHOD(jchar, Char, T_CHAR
1414 , HOTSPOT_JNI_CALLCHARMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1415 HOTSPOT_JNI_CALLCHARMETHOD_RETURN(_ret_ref))
1416 DEFINE_CALLMETHOD(jshort, Short, T_SHORT
1417 , HOTSPOT_JNI_CALLSHORTMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1418 HOTSPOT_JNI_CALLSHORTMETHOD_RETURN(_ret_ref))
1419
1420 DEFINE_CALLMETHOD(jobject, Object, T_OBJECT
1421 , HOTSPOT_JNI_CALLOBJECTMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1422 HOTSPOT_JNI_CALLOBJECTMETHOD_RETURN(_ret_ref))
1423 DEFINE_CALLMETHOD(jint, Int, T_INT,
1424 HOTSPOT_JNI_CALLINTMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1425 HOTSPOT_JNI_CALLINTMETHOD_RETURN(_ret_ref))
1426 DEFINE_CALLMETHOD(jlong, Long, T_LONG
1427 , HOTSPOT_JNI_CALLLONGMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1428 HOTSPOT_JNI_CALLLONGMETHOD_RETURN(_ret_ref))
1429 // Float and double probes don't return value because dtrace doesn't currently support it
1430 DEFINE_CALLMETHOD(jfloat, Float, T_FLOAT
1431 , HOTSPOT_JNI_CALLFLOATMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1432 HOTSPOT_JNI_CALLFLOATMETHOD_RETURN())
1433 DEFINE_CALLMETHOD(jdouble, Double, T_DOUBLE
1434 , HOTSPOT_JNI_CALLDOUBLEMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1435 HOTSPOT_JNI_CALLDOUBLEMETHOD_RETURN())
1436
1437 #define DEFINE_CALLMETHODV(ResultType, Result, Tag \
1438 , EntryProbe, ReturnProbe) \
1439 \
1440 DT_RETURN_MARK_DECL_FOR(Result, Call##Result##MethodV, ResultType \
1441 , ReturnProbe); \
1442 \
1443 JNI_ENTRY(ResultType, \
1444 jni_Call##Result##MethodV(JNIEnv *env, jobject obj, jmethodID methodID, va_list args)) \
1445 JNIWrapper("Call" XSTR(Result) "MethodV"); \
1446 \
1447 EntryProbe;\
1448 ResultType ret = 0;\
1449 DT_RETURN_MARK_FOR(Result, Call##Result##MethodV, ResultType, \
1450 (const ResultType&)ret);\
1451 \
1452 JavaValue jvalue(Tag); \
1453 JNI_ArgumentPusherVaArg ap(methodID, args); \
1454 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK_0); \
1455 ret = jvalue.get_##ResultType(); \
1456 return ret;\
1457 JNI_END
1458
1459 // the runtime type of subword integral basic types is integer
1460 DEFINE_CALLMETHODV(jboolean, Boolean, T_BOOLEAN
1461 , HOTSPOT_JNI_CALLBOOLEANMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1462 HOTSPOT_JNI_CALLBOOLEANMETHODV_RETURN(_ret_ref))
1463 DEFINE_CALLMETHODV(jbyte, Byte, T_BYTE
1464 , HOTSPOT_JNI_CALLBYTEMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1465 HOTSPOT_JNI_CALLBYTEMETHODV_RETURN(_ret_ref))
1466 DEFINE_CALLMETHODV(jchar, Char, T_CHAR
1467 , HOTSPOT_JNI_CALLCHARMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1468 HOTSPOT_JNI_CALLCHARMETHODV_RETURN(_ret_ref))
1469 DEFINE_CALLMETHODV(jshort, Short, T_SHORT
1470 , HOTSPOT_JNI_CALLSHORTMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1471 HOTSPOT_JNI_CALLSHORTMETHODV_RETURN(_ret_ref))
1472
1473 DEFINE_CALLMETHODV(jobject, Object, T_OBJECT
1474 , HOTSPOT_JNI_CALLOBJECTMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1475 HOTSPOT_JNI_CALLOBJECTMETHODV_RETURN(_ret_ref))
1476 DEFINE_CALLMETHODV(jint, Int, T_INT,
1477 HOTSPOT_JNI_CALLINTMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1478 HOTSPOT_JNI_CALLINTMETHODV_RETURN(_ret_ref))
1479 DEFINE_CALLMETHODV(jlong, Long, T_LONG
1480 , HOTSPOT_JNI_CALLLONGMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1481 HOTSPOT_JNI_CALLLONGMETHODV_RETURN(_ret_ref))
1482 // Float and double probes don't return value because dtrace doesn't currently support it
1483 DEFINE_CALLMETHODV(jfloat, Float, T_FLOAT
1484 , HOTSPOT_JNI_CALLFLOATMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1485 HOTSPOT_JNI_CALLFLOATMETHODV_RETURN())
1486 DEFINE_CALLMETHODV(jdouble, Double, T_DOUBLE
1487 , HOTSPOT_JNI_CALLDOUBLEMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1488 HOTSPOT_JNI_CALLDOUBLEMETHODV_RETURN())
1489
1490 #define DEFINE_CALLMETHODA(ResultType, Result, Tag \
1491 , EntryProbe, ReturnProbe) \
1492 \
1493 DT_RETURN_MARK_DECL_FOR(Result, Call##Result##MethodA, ResultType \
1494 , ReturnProbe); \
1495 \
1496 JNI_ENTRY(ResultType, \
1497 jni_Call##Result##MethodA(JNIEnv *env, jobject obj, jmethodID methodID, const jvalue *args)) \
1498 JNIWrapper("Call" XSTR(Result) "MethodA"); \
1499 EntryProbe; \
1500 ResultType ret = 0;\
1501 DT_RETURN_MARK_FOR(Result, Call##Result##MethodA, ResultType, \
1502 (const ResultType&)ret);\
1503 \
1504 JavaValue jvalue(Tag); \
1505 JNI_ArgumentPusherArray ap(methodID, args); \
1506 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK_0); \
1507 ret = jvalue.get_##ResultType(); \
1508 return ret;\
1509 JNI_END
1510
1511 // the runtime type of subword integral basic types is integer
1512 DEFINE_CALLMETHODA(jboolean, Boolean, T_BOOLEAN
1513 , HOTSPOT_JNI_CALLBOOLEANMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1514 HOTSPOT_JNI_CALLBOOLEANMETHODA_RETURN(_ret_ref))
1515 DEFINE_CALLMETHODA(jbyte, Byte, T_BYTE
1516 , HOTSPOT_JNI_CALLBYTEMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1517 HOTSPOT_JNI_CALLBYTEMETHODA_RETURN(_ret_ref))
1518 DEFINE_CALLMETHODA(jchar, Char, T_CHAR
1519 , HOTSPOT_JNI_CALLCHARMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1520 HOTSPOT_JNI_CALLCHARMETHODA_RETURN(_ret_ref))
1521 DEFINE_CALLMETHODA(jshort, Short, T_SHORT
1522 , HOTSPOT_JNI_CALLSHORTMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1523 HOTSPOT_JNI_CALLSHORTMETHODA_RETURN(_ret_ref))
1524
1525 DEFINE_CALLMETHODA(jobject, Object, T_OBJECT
1526 , HOTSPOT_JNI_CALLOBJECTMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1527 HOTSPOT_JNI_CALLOBJECTMETHODA_RETURN(_ret_ref))
1528 DEFINE_CALLMETHODA(jint, Int, T_INT,
1529 HOTSPOT_JNI_CALLINTMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1530 HOTSPOT_JNI_CALLINTMETHODA_RETURN(_ret_ref))
1531 DEFINE_CALLMETHODA(jlong, Long, T_LONG
1532 , HOTSPOT_JNI_CALLLONGMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1533 HOTSPOT_JNI_CALLLONGMETHODA_RETURN(_ret_ref))
1534 // Float and double probes don't return value because dtrace doesn't currently support it
1535 DEFINE_CALLMETHODA(jfloat, Float, T_FLOAT
1536 , HOTSPOT_JNI_CALLFLOATMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1537 HOTSPOT_JNI_CALLFLOATMETHODA_RETURN())
1538 DEFINE_CALLMETHODA(jdouble, Double, T_DOUBLE
1539 , HOTSPOT_JNI_CALLDOUBLEMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1540 HOTSPOT_JNI_CALLDOUBLEMETHODA_RETURN())
1541
1542 DT_VOID_RETURN_MARK_DECL(CallVoidMethod, HOTSPOT_JNI_CALLVOIDMETHOD_RETURN());
1543 DT_VOID_RETURN_MARK_DECL(CallVoidMethodV, HOTSPOT_JNI_CALLVOIDMETHODV_RETURN());
1544 DT_VOID_RETURN_MARK_DECL(CallVoidMethodA, HOTSPOT_JNI_CALLVOIDMETHODA_RETURN());
1545
1546
1547 JNI_ENTRY(void, jni_CallVoidMethod(JNIEnv *env, jobject obj, jmethodID methodID, ...))
1548 JNIWrapper("CallVoidMethod");
1549 HOTSPOT_JNI_CALLVOIDMETHOD_ENTRY(env, obj, (uintptr_t) methodID);
1550 DT_VOID_RETURN_MARK(CallVoidMethod);
1551
1552 va_list args;
1553 va_start(args, methodID);
1554 JavaValue jvalue(T_VOID);
1555 JNI_ArgumentPusherVaArg ap(methodID, args);
1556 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK);
1557 va_end(args);
1558 JNI_END
1559
1560
1561 JNI_ENTRY(void, jni_CallVoidMethodV(JNIEnv *env, jobject obj, jmethodID methodID, va_list args))
1562 JNIWrapper("CallVoidMethodV");
1563 HOTSPOT_JNI_CALLVOIDMETHODV_ENTRY(env, obj, (uintptr_t) methodID);
1564 DT_VOID_RETURN_MARK(CallVoidMethodV);
1565
1566 JavaValue jvalue(T_VOID);
1567 JNI_ArgumentPusherVaArg ap(methodID, args);
1568 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK);
1569 JNI_END
1570
1571
1572 JNI_ENTRY(void, jni_CallVoidMethodA(JNIEnv *env, jobject obj, jmethodID methodID, const jvalue *args))
1573 JNIWrapper("CallVoidMethodA");
1574 HOTSPOT_JNI_CALLVOIDMETHODA_ENTRY(env, obj, (uintptr_t) methodID);
1575 DT_VOID_RETURN_MARK(CallVoidMethodA);
1576
1577 JavaValue jvalue(T_VOID);
1578 JNI_ArgumentPusherArray ap(methodID, args);
1579 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK);
1580 JNI_END
1581
1582
1583
1584 #define DEFINE_CALLNONVIRTUALMETHOD(ResultType, Result, Tag \
1585 , EntryProbe, ReturnProbe) \
1586 \
1587 DT_RETURN_MARK_DECL_FOR(Result, CallNonvirtual##Result##Method, ResultType \
1588 , ReturnProbe);\
1589 \
1590 JNI_ENTRY(ResultType, \
1591 jni_CallNonvirtual##Result##Method(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, ...)) \
1592 JNIWrapper("CallNonvitual" XSTR(Result) "Method"); \
1593 \
1594 EntryProbe;\
1595 ResultType ret;\
1596 DT_RETURN_MARK_FOR(Result, CallNonvirtual##Result##Method, ResultType, \
1597 (const ResultType&)ret);\
1598 \
1599 va_list args; \
1600 va_start(args, methodID); \
1601 JavaValue jvalue(Tag); \
1602 JNI_ArgumentPusherVaArg ap(methodID, args); \
1603 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_0); \
1604 va_end(args); \
1605 ret = jvalue.get_##ResultType(); \
1606 return ret;\
1607 JNI_END
1608
1609 // the runtime type of subword integral basic types is integer
1610 DEFINE_CALLNONVIRTUALMETHOD(jboolean, Boolean, T_BOOLEAN
1611 , HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1612 HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHOD_RETURN(_ret_ref))
1613 DEFINE_CALLNONVIRTUALMETHOD(jbyte, Byte, T_BYTE
1614 , HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1615 HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHOD_RETURN(_ret_ref))
1616 DEFINE_CALLNONVIRTUALMETHOD(jchar, Char, T_CHAR
1617 , HOTSPOT_JNI_CALLNONVIRTUALCHARMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1618 HOTSPOT_JNI_CALLNONVIRTUALCHARMETHOD_RETURN(_ret_ref))
1619 DEFINE_CALLNONVIRTUALMETHOD(jshort, Short, T_SHORT
1620 , HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1621 HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHOD_RETURN(_ret_ref))
1622
1623 DEFINE_CALLNONVIRTUALMETHOD(jobject, Object, T_OBJECT
1624 , HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1625 HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHOD_RETURN(_ret_ref))
1626 DEFINE_CALLNONVIRTUALMETHOD(jint, Int, T_INT
1627 , HOTSPOT_JNI_CALLNONVIRTUALINTMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1628 HOTSPOT_JNI_CALLNONVIRTUALINTMETHOD_RETURN(_ret_ref))
1629 DEFINE_CALLNONVIRTUALMETHOD(jlong, Long, T_LONG
1630 , HOTSPOT_JNI_CALLNONVIRTUALLONGMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1631 // Float and double probes don't return value because dtrace doesn't currently support it
1632 HOTSPOT_JNI_CALLNONVIRTUALLONGMETHOD_RETURN(_ret_ref))
1633 DEFINE_CALLNONVIRTUALMETHOD(jfloat, Float, T_FLOAT
1634 , HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1635 HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHOD_RETURN())
1636 DEFINE_CALLNONVIRTUALMETHOD(jdouble, Double, T_DOUBLE
1637 , HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1638 HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHOD_RETURN())
1639
1640 #define DEFINE_CALLNONVIRTUALMETHODV(ResultType, Result, Tag \
1641 , EntryProbe, ReturnProbe) \
1642 \
1643 DT_RETURN_MARK_DECL_FOR(Result, CallNonvirtual##Result##MethodV, ResultType \
1644 , ReturnProbe);\
1645 \
1646 JNI_ENTRY(ResultType, \
1647 jni_CallNonvirtual##Result##MethodV(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, va_list args)) \
1648 JNIWrapper("CallNonvitual" XSTR(Result) "MethodV"); \
1649 \
1650 EntryProbe;\
1651 ResultType ret;\
1652 DT_RETURN_MARK_FOR(Result, CallNonvirtual##Result##MethodV, ResultType, \
1653 (const ResultType&)ret);\
1654 \
1655 JavaValue jvalue(Tag); \
1656 JNI_ArgumentPusherVaArg ap(methodID, args); \
1657 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_0); \
1658 ret = jvalue.get_##ResultType(); \
1659 return ret;\
1660 JNI_END
1661
1662 // the runtime type of subword integral basic types is integer
1663 DEFINE_CALLNONVIRTUALMETHODV(jboolean, Boolean, T_BOOLEAN
1664 , HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1665 HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHODV_RETURN(_ret_ref))
1666 DEFINE_CALLNONVIRTUALMETHODV(jbyte, Byte, T_BYTE
1667 , HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1668 HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHODV_RETURN(_ret_ref))
1669 DEFINE_CALLNONVIRTUALMETHODV(jchar, Char, T_CHAR
1670 , HOTSPOT_JNI_CALLNONVIRTUALCHARMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1671 HOTSPOT_JNI_CALLNONVIRTUALCHARMETHODV_RETURN(_ret_ref))
1672 DEFINE_CALLNONVIRTUALMETHODV(jshort, Short, T_SHORT
1673 , HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1674 HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHODV_RETURN(_ret_ref))
1675
1676 DEFINE_CALLNONVIRTUALMETHODV(jobject, Object, T_OBJECT
1677 , HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1678 HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHODV_RETURN(_ret_ref))
1679 DEFINE_CALLNONVIRTUALMETHODV(jint, Int, T_INT
1680 , HOTSPOT_JNI_CALLNONVIRTUALINTMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1681 HOTSPOT_JNI_CALLNONVIRTUALINTMETHODV_RETURN(_ret_ref))
1682 DEFINE_CALLNONVIRTUALMETHODV(jlong, Long, T_LONG
1683 , HOTSPOT_JNI_CALLNONVIRTUALLONGMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1684 // Float and double probes don't return value because dtrace doesn't currently support it
1685 HOTSPOT_JNI_CALLNONVIRTUALLONGMETHODV_RETURN(_ret_ref))
1686 DEFINE_CALLNONVIRTUALMETHODV(jfloat, Float, T_FLOAT
1687 , HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1688 HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHODV_RETURN())
1689 DEFINE_CALLNONVIRTUALMETHODV(jdouble, Double, T_DOUBLE
1690 , HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1691 HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHODV_RETURN())
1692
1693 #define DEFINE_CALLNONVIRTUALMETHODA(ResultType, Result, Tag \
1694 , EntryProbe, ReturnProbe) \
1695 \
1696 DT_RETURN_MARK_DECL_FOR(Result, CallNonvirtual##Result##MethodA, ResultType \
1697 , ReturnProbe);\
1698 \
1699 JNI_ENTRY(ResultType, \
1700 jni_CallNonvirtual##Result##MethodA(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, const jvalue *args)) \
1701 JNIWrapper("CallNonvitual" XSTR(Result) "MethodA"); \
1702 \
1703 EntryProbe;\
1704 ResultType ret;\
1705 DT_RETURN_MARK_FOR(Result, CallNonvirtual##Result##MethodA, ResultType, \
1706 (const ResultType&)ret);\
1707 \
1708 JavaValue jvalue(Tag); \
1709 JNI_ArgumentPusherArray ap(methodID, args); \
1710 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_0); \
1711 ret = jvalue.get_##ResultType(); \
1712 return ret;\
1713 JNI_END
1714
1715 // the runtime type of subword integral basic types is integer
1716 DEFINE_CALLNONVIRTUALMETHODA(jboolean, Boolean, T_BOOLEAN
1717 , HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1718 HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHODA_RETURN(_ret_ref))
1719 DEFINE_CALLNONVIRTUALMETHODA(jbyte, Byte, T_BYTE
1720 , HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1721 HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHODA_RETURN(_ret_ref))
1722 DEFINE_CALLNONVIRTUALMETHODA(jchar, Char, T_CHAR
1723 , HOTSPOT_JNI_CALLNONVIRTUALCHARMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1724 HOTSPOT_JNI_CALLNONVIRTUALCHARMETHODA_RETURN(_ret_ref))
1725 DEFINE_CALLNONVIRTUALMETHODA(jshort, Short, T_SHORT
1726 , HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1727 HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHODA_RETURN(_ret_ref))
1728
1729 DEFINE_CALLNONVIRTUALMETHODA(jobject, Object, T_OBJECT
1730 , HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1731 HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHODA_RETURN(_ret_ref))
1732 DEFINE_CALLNONVIRTUALMETHODA(jint, Int, T_INT
1733 , HOTSPOT_JNI_CALLNONVIRTUALINTMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1734 HOTSPOT_JNI_CALLNONVIRTUALINTMETHODA_RETURN(_ret_ref))
1735 DEFINE_CALLNONVIRTUALMETHODA(jlong, Long, T_LONG
1736 , HOTSPOT_JNI_CALLNONVIRTUALLONGMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1737 // Float and double probes don't return value because dtrace doesn't currently support it
1738 HOTSPOT_JNI_CALLNONVIRTUALLONGMETHODA_RETURN(_ret_ref))
1739 DEFINE_CALLNONVIRTUALMETHODA(jfloat, Float, T_FLOAT
1740 , HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1741 HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHODA_RETURN())
1742 DEFINE_CALLNONVIRTUALMETHODA(jdouble, Double, T_DOUBLE
1743 , HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1744 HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHODA_RETURN())
1745
1746 DT_VOID_RETURN_MARK_DECL(CallNonvirtualVoidMethod
1747 , HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHOD_RETURN());
1748 DT_VOID_RETURN_MARK_DECL(CallNonvirtualVoidMethodV
1749 , HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHODV_RETURN());
1750 DT_VOID_RETURN_MARK_DECL(CallNonvirtualVoidMethodA
1751 , HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHODA_RETURN());
1752
1753 JNI_ENTRY(void, jni_CallNonvirtualVoidMethod(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, ...))
1754 JNIWrapper("CallNonvirtualVoidMethod");
1755
1756 HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHOD_ENTRY(env, obj, cls, (uintptr_t) methodID);
1757 DT_VOID_RETURN_MARK(CallNonvirtualVoidMethod);
1758
1759 va_list args;
1760 va_start(args, methodID);
1761 JavaValue jvalue(T_VOID);
1762 JNI_ArgumentPusherVaArg ap(methodID, args);
1763 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK);
1764 va_end(args);
1765 JNI_END
1766
1767
1768 JNI_ENTRY(void, jni_CallNonvirtualVoidMethodV(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, va_list args))
1769 JNIWrapper("CallNonvirtualVoidMethodV");
1770
1771 HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHODV_ENTRY(
1772 env, obj, cls, (uintptr_t) methodID);
1773 DT_VOID_RETURN_MARK(CallNonvirtualVoidMethodV);
1774
1775 JavaValue jvalue(T_VOID);
1776 JNI_ArgumentPusherVaArg ap(methodID, args);
1777 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK);
1778 JNI_END
1779
1780
1781 JNI_ENTRY(void, jni_CallNonvirtualVoidMethodA(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, const jvalue *args))
1782 JNIWrapper("CallNonvirtualVoidMethodA");
1783 HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHODA_ENTRY(
1784 env, obj, cls, (uintptr_t) methodID);
1785 DT_VOID_RETURN_MARK(CallNonvirtualVoidMethodA);
1786 JavaValue jvalue(T_VOID);
1787 JNI_ArgumentPusherArray ap(methodID, args);
1788 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK);
1789 JNI_END
1790
1791
1792
1793 #define DEFINE_CALLSTATICMETHOD(ResultType, Result, Tag \
1794 , EntryProbe, ResultProbe) \
1795 \
1796 DT_RETURN_MARK_DECL_FOR(Result, CallStatic##Result##Method, ResultType \
1797 , ResultProbe); \
1798 \
1799 JNI_ENTRY(ResultType, \
1800 jni_CallStatic##Result##Method(JNIEnv *env, jclass cls, jmethodID methodID, ...)) \
1801 JNIWrapper("CallStatic" XSTR(Result) "Method"); \
1802 \
1803 EntryProbe; \
1804 ResultType ret = 0;\
1805 DT_RETURN_MARK_FOR(Result, CallStatic##Result##Method, ResultType, \
1806 (const ResultType&)ret);\
1807 \
1808 va_list args; \
1809 va_start(args, methodID); \
1810 JavaValue jvalue(Tag); \
1811 JNI_ArgumentPusherVaArg ap(methodID, args); \
1812 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK_0); \
1813 va_end(args); \
1814 ret = jvalue.get_##ResultType(); \
1815 return ret;\
1816 JNI_END
1817
1818 // the runtime type of subword integral basic types is integer
1819 DEFINE_CALLSTATICMETHOD(jboolean, Boolean, T_BOOLEAN
1820 , HOTSPOT_JNI_CALLSTATICBOOLEANMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1821 HOTSPOT_JNI_CALLSTATICBOOLEANMETHOD_RETURN(_ret_ref));
1822 DEFINE_CALLSTATICMETHOD(jbyte, Byte, T_BYTE
1823 , HOTSPOT_JNI_CALLSTATICBYTEMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1824 HOTSPOT_JNI_CALLSTATICBYTEMETHOD_RETURN(_ret_ref));
1825 DEFINE_CALLSTATICMETHOD(jchar, Char, T_CHAR
1826 , HOTSPOT_JNI_CALLSTATICCHARMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1827 HOTSPOT_JNI_CALLSTATICCHARMETHOD_RETURN(_ret_ref));
1828 DEFINE_CALLSTATICMETHOD(jshort, Short, T_SHORT
1829 , HOTSPOT_JNI_CALLSTATICSHORTMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1830 HOTSPOT_JNI_CALLSTATICSHORTMETHOD_RETURN(_ret_ref));
1831
1832 DEFINE_CALLSTATICMETHOD(jobject, Object, T_OBJECT
1833 , HOTSPOT_JNI_CALLSTATICOBJECTMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1834 HOTSPOT_JNI_CALLSTATICOBJECTMETHOD_RETURN(_ret_ref));
1835 DEFINE_CALLSTATICMETHOD(jint, Int, T_INT
1836 , HOTSPOT_JNI_CALLSTATICINTMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1837 HOTSPOT_JNI_CALLSTATICINTMETHOD_RETURN(_ret_ref));
1838 DEFINE_CALLSTATICMETHOD(jlong, Long, T_LONG
1839 , HOTSPOT_JNI_CALLSTATICLONGMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1840 HOTSPOT_JNI_CALLSTATICLONGMETHOD_RETURN(_ret_ref));
1841 // Float and double probes don't return value because dtrace doesn't currently support it
1842 DEFINE_CALLSTATICMETHOD(jfloat, Float, T_FLOAT
1843 , HOTSPOT_JNI_CALLSTATICFLOATMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1844 HOTSPOT_JNI_CALLSTATICFLOATMETHOD_RETURN());
1845 DEFINE_CALLSTATICMETHOD(jdouble, Double, T_DOUBLE
1846 , HOTSPOT_JNI_CALLSTATICDOUBLEMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1847 HOTSPOT_JNI_CALLSTATICDOUBLEMETHOD_RETURN());
1848
1849 #define DEFINE_CALLSTATICMETHODV(ResultType, Result, Tag \
1850 , EntryProbe, ResultProbe) \
1851 \
1852 DT_RETURN_MARK_DECL_FOR(Result, CallStatic##Result##MethodV, ResultType \
1853 , ResultProbe); \
1854 \
1855 JNI_ENTRY(ResultType, \
1856 jni_CallStatic##Result##MethodV(JNIEnv *env, jclass cls, jmethodID methodID, va_list args)) \
1857 JNIWrapper("CallStatic" XSTR(Result) "MethodV"); \
1858 \
1859 EntryProbe; \
1860 ResultType ret = 0;\
1861 DT_RETURN_MARK_FOR(Result, CallStatic##Result##MethodV, ResultType, \
1862 (const ResultType&)ret);\
1863 \
1864 JavaValue jvalue(Tag); \
1865 JNI_ArgumentPusherVaArg ap(methodID, args); \
1866 /* Make sure class is initialized before trying to invoke its method */ \
1867 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); \
1868 k->initialize(CHECK_0); \
1869 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK_0); \
1870 va_end(args); \
1871 ret = jvalue.get_##ResultType(); \
1872 return ret;\
1873 JNI_END
1874
1875 // the runtime type of subword integral basic types is integer
1876 DEFINE_CALLSTATICMETHODV(jboolean, Boolean, T_BOOLEAN
1877 , HOTSPOT_JNI_CALLSTATICBOOLEANMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1878 HOTSPOT_JNI_CALLSTATICBOOLEANMETHODV_RETURN(_ret_ref));
1879 DEFINE_CALLSTATICMETHODV(jbyte, Byte, T_BYTE
1880 , HOTSPOT_JNI_CALLSTATICBYTEMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1881 HOTSPOT_JNI_CALLSTATICBYTEMETHODV_RETURN(_ret_ref));
1882 DEFINE_CALLSTATICMETHODV(jchar, Char, T_CHAR
1883 , HOTSPOT_JNI_CALLSTATICCHARMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1884 HOTSPOT_JNI_CALLSTATICCHARMETHODV_RETURN(_ret_ref));
1885 DEFINE_CALLSTATICMETHODV(jshort, Short, T_SHORT
1886 , HOTSPOT_JNI_CALLSTATICSHORTMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1887 HOTSPOT_JNI_CALLSTATICSHORTMETHODV_RETURN(_ret_ref));
1888
1889 DEFINE_CALLSTATICMETHODV(jobject, Object, T_OBJECT
1890 , HOTSPOT_JNI_CALLSTATICOBJECTMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1891 HOTSPOT_JNI_CALLSTATICOBJECTMETHODV_RETURN(_ret_ref));
1892 DEFINE_CALLSTATICMETHODV(jint, Int, T_INT
1893 , HOTSPOT_JNI_CALLSTATICINTMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1894 HOTSPOT_JNI_CALLSTATICINTMETHODV_RETURN(_ret_ref));
1895 DEFINE_CALLSTATICMETHODV(jlong, Long, T_LONG
1896 , HOTSPOT_JNI_CALLSTATICLONGMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1897 HOTSPOT_JNI_CALLSTATICLONGMETHODV_RETURN(_ret_ref));
1898 // Float and double probes don't return value because dtrace doesn't currently support it
1899 DEFINE_CALLSTATICMETHODV(jfloat, Float, T_FLOAT
1900 , HOTSPOT_JNI_CALLSTATICFLOATMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1901 HOTSPOT_JNI_CALLSTATICFLOATMETHODV_RETURN());
1902 DEFINE_CALLSTATICMETHODV(jdouble, Double, T_DOUBLE
1903 , HOTSPOT_JNI_CALLSTATICDOUBLEMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1904 HOTSPOT_JNI_CALLSTATICDOUBLEMETHODV_RETURN());
1905
1906 #define DEFINE_CALLSTATICMETHODA(ResultType, Result, Tag \
1907 , EntryProbe, ResultProbe) \
1908 \
1909 DT_RETURN_MARK_DECL_FOR(Result, CallStatic##Result##MethodA, ResultType \
1910 , ResultProbe); \
1911 \
1912 JNI_ENTRY(ResultType, \
1913 jni_CallStatic##Result##MethodA(JNIEnv *env, jclass cls, jmethodID methodID, const jvalue *args)) \
1914 JNIWrapper("CallStatic" XSTR(Result) "MethodA"); \
1915 \
1916 EntryProbe; \
1917 ResultType ret = 0;\
1918 DT_RETURN_MARK_FOR(Result, CallStatic##Result##MethodA, ResultType, \
1919 (const ResultType&)ret);\
1920 \
1921 JavaValue jvalue(Tag); \
1922 JNI_ArgumentPusherArray ap(methodID, args); \
1923 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK_0); \
1924 ret = jvalue.get_##ResultType(); \
1925 return ret;\
1926 JNI_END
1927
1928 // the runtime type of subword integral basic types is integer
1929 DEFINE_CALLSTATICMETHODA(jboolean, Boolean, T_BOOLEAN
1930 , HOTSPOT_JNI_CALLSTATICBOOLEANMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1931 HOTSPOT_JNI_CALLSTATICBOOLEANMETHODA_RETURN(_ret_ref));
1932 DEFINE_CALLSTATICMETHODA(jbyte, Byte, T_BYTE
1933 , HOTSPOT_JNI_CALLSTATICBYTEMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1934 HOTSPOT_JNI_CALLSTATICBYTEMETHODA_RETURN(_ret_ref));
1935 DEFINE_CALLSTATICMETHODA(jchar, Char, T_CHAR
1936 , HOTSPOT_JNI_CALLSTATICCHARMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1937 HOTSPOT_JNI_CALLSTATICCHARMETHODA_RETURN(_ret_ref));
1938 DEFINE_CALLSTATICMETHODA(jshort, Short, T_SHORT
1939 , HOTSPOT_JNI_CALLSTATICSHORTMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1940 HOTSPOT_JNI_CALLSTATICSHORTMETHODA_RETURN(_ret_ref));
1941
1942 DEFINE_CALLSTATICMETHODA(jobject, Object, T_OBJECT
1943 , HOTSPOT_JNI_CALLSTATICOBJECTMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1944 HOTSPOT_JNI_CALLSTATICOBJECTMETHODA_RETURN(_ret_ref));
1945 DEFINE_CALLSTATICMETHODA(jint, Int, T_INT
1946 , HOTSPOT_JNI_CALLSTATICINTMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1947 HOTSPOT_JNI_CALLSTATICINTMETHODA_RETURN(_ret_ref));
1948 DEFINE_CALLSTATICMETHODA(jlong, Long, T_LONG
1949 , HOTSPOT_JNI_CALLSTATICLONGMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1950 HOTSPOT_JNI_CALLSTATICLONGMETHODA_RETURN(_ret_ref));
1951 // Float and double probes don't return value because dtrace doesn't currently support it
1952 DEFINE_CALLSTATICMETHODA(jfloat, Float, T_FLOAT
1953 , HOTSPOT_JNI_CALLSTATICFLOATMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1954 HOTSPOT_JNI_CALLSTATICFLOATMETHODA_RETURN());
1955 DEFINE_CALLSTATICMETHODA(jdouble, Double, T_DOUBLE
1956 , HOTSPOT_JNI_CALLSTATICDOUBLEMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1957 HOTSPOT_JNI_CALLSTATICDOUBLEMETHODA_RETURN());
1958
1959 DT_VOID_RETURN_MARK_DECL(CallStaticVoidMethod
1960 , HOTSPOT_JNI_CALLSTATICVOIDMETHOD_RETURN());
1961 DT_VOID_RETURN_MARK_DECL(CallStaticVoidMethodV
1962 , HOTSPOT_JNI_CALLSTATICVOIDMETHODV_RETURN());
1963 DT_VOID_RETURN_MARK_DECL(CallStaticVoidMethodA
1964 , HOTSPOT_JNI_CALLSTATICVOIDMETHODA_RETURN());
1965
1966 JNI_ENTRY(void, jni_CallStaticVoidMethod(JNIEnv *env, jclass cls, jmethodID methodID, ...))
1967 JNIWrapper("CallStaticVoidMethod");
1968 HOTSPOT_JNI_CALLSTATICVOIDMETHOD_ENTRY(env, cls, (uintptr_t) methodID);
1969 DT_VOID_RETURN_MARK(CallStaticVoidMethod);
1970
1971 va_list args;
1972 va_start(args, methodID);
1973 JavaValue jvalue(T_VOID);
1974 JNI_ArgumentPusherVaArg ap(methodID, args);
1975 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK);
1976 va_end(args);
1977 JNI_END
1978
1979
1980 JNI_ENTRY(void, jni_CallStaticVoidMethodV(JNIEnv *env, jclass cls, jmethodID methodID, va_list args))
1981 JNIWrapper("CallStaticVoidMethodV");
1982 HOTSPOT_JNI_CALLSTATICVOIDMETHODV_ENTRY(env, cls, (uintptr_t) methodID);
1983 DT_VOID_RETURN_MARK(CallStaticVoidMethodV);
1984
1985 JavaValue jvalue(T_VOID);
1986 JNI_ArgumentPusherVaArg ap(methodID, args);
1987 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK);
1988 JNI_END
1989
1990
1991 JNI_ENTRY(void, jni_CallStaticVoidMethodA(JNIEnv *env, jclass cls, jmethodID methodID, const jvalue *args))
1992 JNIWrapper("CallStaticVoidMethodA");
1993 HOTSPOT_JNI_CALLSTATICVOIDMETHODA_ENTRY(env, cls, (uintptr_t) methodID);
1994 DT_VOID_RETURN_MARK(CallStaticVoidMethodA);
1995
1996 JavaValue jvalue(T_VOID);
1997 JNI_ArgumentPusherArray ap(methodID, args);
1998 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK);
1999 JNI_END
2000
2001
2002 //
2003 // Accessing Fields
2004 //
2005
2006
2007 DT_RETURN_MARK_DECL(GetFieldID, jfieldID
2008 , HOTSPOT_JNI_GETFIELDID_RETURN((uintptr_t)_ret_ref));
2009
2010 JNI_ENTRY(jfieldID, jni_GetFieldID(JNIEnv *env, jclass clazz,
2011 const char *name, const char *sig))
2012 JNIWrapper("GetFieldID");
2013 HOTSPOT_JNI_GETFIELDID_ENTRY(env, clazz, (char *) name, (char *) sig);
2014 jfieldID ret = 0;
2015 DT_RETURN_MARK(GetFieldID, jfieldID, (const jfieldID&)ret);
2016
2017 // The class should have been loaded (we have an instance of the class
2018 // passed in) so the field and signature should already be in the symbol
2019 // table. If they're not there, the field doesn't exist.
2020 TempNewSymbol fieldname = SymbolTable::probe(name, (int)strlen(name));
2021 TempNewSymbol signame = SymbolTable::probe(sig, (int)strlen(sig));
2022 if (fieldname == NULL || signame == NULL) {
2023 THROW_MSG_0(vmSymbols::java_lang_NoSuchFieldError(), (char*) name);
2024 }
2025 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz));
2026 // Make sure class is initialized before handing id's out to fields
2027 k->initialize(CHECK_NULL);
2028
2029 fieldDescriptor fd;
2030 if (!k->is_instance_klass() ||
2031 !InstanceKlass::cast(k)->find_field(fieldname, signame, false, &fd)) {
2032 THROW_MSG_0(vmSymbols::java_lang_NoSuchFieldError(), (char*) name);
2033 }
2034
2035 // A jfieldID for a non-static field is simply the offset of the field within the instanceOop
2036 // It may also have hash bits for k, if VerifyJNIFields is turned on.
2037 ret = jfieldIDWorkaround::to_instance_jfieldID(k, fd.offset());
2038 return ret;
2039 JNI_END
2040
2041
2042 JNI_ENTRY(jobject, jni_GetObjectField(JNIEnv *env, jobject obj, jfieldID fieldID))
2043 JNIWrapper("GetObjectField");
2044 HOTSPOT_JNI_GETOBJECTFIELD_ENTRY(env, obj, (uintptr_t) fieldID);
2045 oop o = JNIHandles::resolve_non_null(obj);
2046 Klass* k = o->klass();
2047 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID);
2048 // Keep JVMTI addition small and only check enabled flag here.
2049 // jni_GetField_probe() assumes that is okay to create handles.
2050 if (JvmtiExport::should_post_field_access()) {
2051 o = JvmtiExport::jni_GetField_probe(thread, obj, o, k, fieldID, false);
2052 }
2053 oop loaded_obj = HeapAccess<ON_UNKNOWN_OOP_REF>::oop_load_at(o, offset);
2054 jobject ret = JNIHandles::make_local(env, loaded_obj);
2055 HOTSPOT_JNI_GETOBJECTFIELD_RETURN(ret);
2056 return ret;
2057 JNI_END
2058
2059
2060
2061 #define DEFINE_GETFIELD(Return,Fieldname,Result \
2062 , EntryProbe, ReturnProbe) \
2063 \
2064 DT_RETURN_MARK_DECL_FOR(Result, Get##Result##Field, Return \
2065 , ReturnProbe); \
2066 \
2067 JNI_QUICK_ENTRY(Return, jni_Get##Result##Field(JNIEnv *env, jobject obj, jfieldID fieldID)) \
2068 JNIWrapper("Get" XSTR(Result) "Field"); \
2069 \
2070 EntryProbe; \
2071 Return ret = 0;\
2072 DT_RETURN_MARK_FOR(Result, Get##Result##Field, Return, (const Return&)ret);\
2073 \
2074 oop o = JNIHandles::resolve_non_null(obj); \
2075 Klass* k = o->klass(); \
2076 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID); \
2077 /* Keep JVMTI addition small and only check enabled flag here. */ \
2078 /* jni_GetField_probe_nh() assumes that is not okay to create handles */ \
2079 /* and creates a ResetNoHandleMark. */ \
2080 if (JvmtiExport::should_post_field_access()) { \
2081 o = JvmtiExport::jni_GetField_probe_nh(thread, obj, o, k, fieldID, false); \
2082 } \
2083 ret = o->Fieldname##_field(offset); \
2084 return ret; \
2085 JNI_END
2086
2087 DEFINE_GETFIELD(jboolean, bool, Boolean
2088 , HOTSPOT_JNI_GETBOOLEANFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2089 HOTSPOT_JNI_GETBOOLEANFIELD_RETURN(_ret_ref))
2090 DEFINE_GETFIELD(jbyte, byte, Byte
2091 , HOTSPOT_JNI_GETBYTEFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2092 HOTSPOT_JNI_GETBYTEFIELD_RETURN(_ret_ref))
2093 DEFINE_GETFIELD(jchar, char, Char
2094 , HOTSPOT_JNI_GETCHARFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2095 HOTSPOT_JNI_GETCHARFIELD_RETURN(_ret_ref))
2096 DEFINE_GETFIELD(jshort, short, Short
2097 , HOTSPOT_JNI_GETSHORTFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2098 HOTSPOT_JNI_GETSHORTFIELD_RETURN(_ret_ref))
2099 DEFINE_GETFIELD(jint, int, Int
2100 , HOTSPOT_JNI_GETINTFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2101 HOTSPOT_JNI_GETINTFIELD_RETURN(_ret_ref))
2102 DEFINE_GETFIELD(jlong, long, Long
2103 , HOTSPOT_JNI_GETLONGFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2104 HOTSPOT_JNI_GETLONGFIELD_RETURN(_ret_ref))
2105 // Float and double probes don't return value because dtrace doesn't currently support it
2106 DEFINE_GETFIELD(jfloat, float, Float
2107 , HOTSPOT_JNI_GETFLOATFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2108 HOTSPOT_JNI_GETFLOATFIELD_RETURN())
2109 DEFINE_GETFIELD(jdouble, double, Double
2110 , HOTSPOT_JNI_GETDOUBLEFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2111 HOTSPOT_JNI_GETDOUBLEFIELD_RETURN())
2112
2113 address jni_GetBooleanField_addr() {
2114 return (address)jni_GetBooleanField;
2115 }
2116 address jni_GetByteField_addr() {
2117 return (address)jni_GetByteField;
2118 }
2119 address jni_GetCharField_addr() {
2120 return (address)jni_GetCharField;
2121 }
2122 address jni_GetShortField_addr() {
2123 return (address)jni_GetShortField;
2124 }
2125 address jni_GetIntField_addr() {
2126 return (address)jni_GetIntField;
2127 }
2128 address jni_GetLongField_addr() {
2129 return (address)jni_GetLongField;
2130 }
2131 address jni_GetFloatField_addr() {
2132 return (address)jni_GetFloatField;
2133 }
2134 address jni_GetDoubleField_addr() {
2135 return (address)jni_GetDoubleField;
2136 }
2137
2138 JNI_QUICK_ENTRY(void, jni_SetObjectField(JNIEnv *env, jobject obj, jfieldID fieldID, jobject value))
2139 JNIWrapper("SetObjectField");
2140 HOTSPOT_JNI_SETOBJECTFIELD_ENTRY(env, obj, (uintptr_t) fieldID, value);
2141 oop o = JNIHandles::resolve_non_null(obj);
2142 Klass* k = o->klass();
2143 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID);
2144 // Keep JVMTI addition small and only check enabled flag here.
2145 // jni_SetField_probe_nh() assumes that is not okay to create handles
2146 // and creates a ResetNoHandleMark.
2147 if (JvmtiExport::should_post_field_modification()) {
2148 jvalue field_value;
2149 field_value.l = value;
2150 o = JvmtiExport::jni_SetField_probe_nh(thread, obj, o, k, fieldID, false, 'L', (jvalue *)&field_value);
2151 }
2152 HeapAccess<ON_UNKNOWN_OOP_REF>::oop_store_at(o, offset, JNIHandles::resolve(value));
2153 HOTSPOT_JNI_SETOBJECTFIELD_RETURN();
2154 JNI_END
2155
2156
2157 #define DEFINE_SETFIELD(Argument,Fieldname,Result,SigType,unionType \
2158 , EntryProbe, ReturnProbe) \
2159 \
2160 JNI_QUICK_ENTRY(void, jni_Set##Result##Field(JNIEnv *env, jobject obj, jfieldID fieldID, Argument value)) \
2161 JNIWrapper("Set" XSTR(Result) "Field"); \
2162 \
2163 EntryProbe; \
2164 \
2165 oop o = JNIHandles::resolve_non_null(obj); \
2166 Klass* k = o->klass(); \
2167 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID); \
2168 /* Keep JVMTI addition small and only check enabled flag here. */ \
2169 /* jni_SetField_probe_nh() assumes that is not okay to create handles */ \
2170 /* and creates a ResetNoHandleMark. */ \
2171 if (JvmtiExport::should_post_field_modification()) { \
2172 jvalue field_value; \
2173 field_value.unionType = value; \
2174 o = JvmtiExport::jni_SetField_probe_nh(thread, obj, o, k, fieldID, false, SigType, (jvalue *)&field_value); \
2175 } \
2176 if (SigType == 'Z') { value = ((jboolean)value) & 1; } \
2177 o->Fieldname##_field_put(offset, value); \
2178 ReturnProbe; \
2179 JNI_END
2180
2181 DEFINE_SETFIELD(jboolean, bool, Boolean, 'Z', z
2182 , HOTSPOT_JNI_SETBOOLEANFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value),
2183 HOTSPOT_JNI_SETBOOLEANFIELD_RETURN())
2184 DEFINE_SETFIELD(jbyte, byte, Byte, 'B', b
2185 , HOTSPOT_JNI_SETBYTEFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value),
2186 HOTSPOT_JNI_SETBYTEFIELD_RETURN())
2187 DEFINE_SETFIELD(jchar, char, Char, 'C', c
2188 , HOTSPOT_JNI_SETCHARFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value),
2189 HOTSPOT_JNI_SETCHARFIELD_RETURN())
2190 DEFINE_SETFIELD(jshort, short, Short, 'S', s
2191 , HOTSPOT_JNI_SETSHORTFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value),
2192 HOTSPOT_JNI_SETSHORTFIELD_RETURN())
2193 DEFINE_SETFIELD(jint, int, Int, 'I', i
2194 , HOTSPOT_JNI_SETINTFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value),
2195 HOTSPOT_JNI_SETINTFIELD_RETURN())
2196 DEFINE_SETFIELD(jlong, long, Long, 'J', j
2197 , HOTSPOT_JNI_SETLONGFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value),
2198 HOTSPOT_JNI_SETLONGFIELD_RETURN())
2199 // Float and double probes don't return value because dtrace doesn't currently support it
2200 DEFINE_SETFIELD(jfloat, float, Float, 'F', f
2201 , HOTSPOT_JNI_SETFLOATFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2202 HOTSPOT_JNI_SETFLOATFIELD_RETURN())
2203 DEFINE_SETFIELD(jdouble, double, Double, 'D', d
2204 , HOTSPOT_JNI_SETDOUBLEFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2205 HOTSPOT_JNI_SETDOUBLEFIELD_RETURN())
2206
2207 DT_RETURN_MARK_DECL(ToReflectedField, jobject
2208 , HOTSPOT_JNI_TOREFLECTEDFIELD_RETURN(_ret_ref));
2209
2210 JNI_ENTRY(jobject, jni_ToReflectedField(JNIEnv *env, jclass cls, jfieldID fieldID, jboolean isStatic))
2211 JNIWrapper("ToReflectedField");
2212 HOTSPOT_JNI_TOREFLECTEDFIELD_ENTRY(env, cls, (uintptr_t) fieldID, isStatic);
2213 jobject ret = NULL;
2214 DT_RETURN_MARK(ToReflectedField, jobject, (const jobject&)ret);
2215
2216 fieldDescriptor fd;
2217 bool found = false;
2218 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2219
2220 assert(jfieldIDWorkaround::is_static_jfieldID(fieldID) == (isStatic != 0), "invalid fieldID");
2221
2222 if (isStatic) {
2223 // Static field. The fieldID a JNIid specifying the field holder and the offset within the Klass*.
2224 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID);
2225 assert(id->is_static_field_id(), "invalid static field id");
2226 found = id->find_local_field(&fd);
2227 } else {
2228 // Non-static field. The fieldID is really the offset of the field within the instanceOop.
2229 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID);
2230 found = InstanceKlass::cast(k)->find_field_from_offset(offset, false, &fd);
2231 }
2232 assert(found, "bad fieldID passed into jni_ToReflectedField");
2233 oop reflected = Reflection::new_field(&fd, CHECK_NULL);
2234 ret = JNIHandles::make_local(env, reflected);
2235 return ret;
2236 JNI_END
2237
2238
2239 //
2240 // Accessing Static Fields
2241 //
2242 DT_RETURN_MARK_DECL(GetStaticFieldID, jfieldID
2243 , HOTSPOT_JNI_GETSTATICFIELDID_RETURN((uintptr_t)_ret_ref));
2244
2245 JNI_ENTRY(jfieldID, jni_GetStaticFieldID(JNIEnv *env, jclass clazz,
2246 const char *name, const char *sig))
2247 JNIWrapper("GetStaticFieldID");
2248 HOTSPOT_JNI_GETSTATICFIELDID_ENTRY(env, clazz, (char *) name, (char *) sig);
2249 jfieldID ret = NULL;
2250 DT_RETURN_MARK(GetStaticFieldID, jfieldID, (const jfieldID&)ret);
2251
2252 // The class should have been loaded (we have an instance of the class
2253 // passed in) so the field and signature should already be in the symbol
2254 // table. If they're not there, the field doesn't exist.
2255 TempNewSymbol fieldname = SymbolTable::probe(name, (int)strlen(name));
2256 TempNewSymbol signame = SymbolTable::probe(sig, (int)strlen(sig));
2257 if (fieldname == NULL || signame == NULL) {
2258 THROW_MSG_0(vmSymbols::java_lang_NoSuchFieldError(), (char*) name);
2259 }
2260 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz));
2261 // Make sure class is initialized before handing id's out to static fields
2262 k->initialize(CHECK_NULL);
2263
2264 fieldDescriptor fd;
2265 if (!k->is_instance_klass() ||
2266 !InstanceKlass::cast(k)->find_field(fieldname, signame, true, &fd)) {
2267 THROW_MSG_0(vmSymbols::java_lang_NoSuchFieldError(), (char*) name);
2268 }
2269
2270 // A jfieldID for a static field is a JNIid specifying the field holder and the offset within the Klass*
2271 JNIid* id = fd.field_holder()->jni_id_for(fd.offset());
2272 debug_only(id->set_is_static_field_id();)
2273
2274 debug_only(id->verify(fd.field_holder()));
2275
2276 ret = jfieldIDWorkaround::to_static_jfieldID(id);
2277 return ret;
2278 JNI_END
2279
2280
2281 JNI_ENTRY(jobject, jni_GetStaticObjectField(JNIEnv *env, jclass clazz, jfieldID fieldID))
2282 JNIWrapper("GetStaticObjectField");
2283 HOTSPOT_JNI_GETSTATICOBJECTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID);
2284 #if INCLUDE_JNI_CHECK
2285 DEBUG_ONLY(Klass* param_k = jniCheck::validate_class(thread, clazz);)
2286 #endif // INCLUDE_JNI_CHECK
2287 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID);
2288 assert(id->is_static_field_id(), "invalid static field id");
2289 // Keep JVMTI addition small and only check enabled flag here.
2290 // jni_GetField_probe() assumes that is okay to create handles.
2291 if (JvmtiExport::should_post_field_access()) {
2292 JvmtiExport::jni_GetField_probe(thread, NULL, NULL, id->holder(), fieldID, true);
2293 }
2294 jobject ret = JNIHandles::make_local(id->holder()->java_mirror()->obj_field(id->offset()));
2295 HOTSPOT_JNI_GETSTATICOBJECTFIELD_RETURN(ret);
2296 return ret;
2297 JNI_END
2298
2299
2300 #define DEFINE_GETSTATICFIELD(Return,Fieldname,Result \
2301 , EntryProbe, ReturnProbe) \
2302 \
2303 DT_RETURN_MARK_DECL_FOR(Result, GetStatic##Result##Field, Return \
2304 , ReturnProbe); \
2305 \
2306 JNI_ENTRY(Return, jni_GetStatic##Result##Field(JNIEnv *env, jclass clazz, jfieldID fieldID)) \
2307 JNIWrapper("GetStatic" XSTR(Result) "Field"); \
2308 EntryProbe; \
2309 Return ret = 0;\
2310 DT_RETURN_MARK_FOR(Result, GetStatic##Result##Field, Return, \
2311 (const Return&)ret);\
2312 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID); \
2313 assert(id->is_static_field_id(), "invalid static field id"); \
2314 /* Keep JVMTI addition small and only check enabled flag here. */ \
2315 /* jni_GetField_probe() assumes that is okay to create handles. */ \
2316 if (JvmtiExport::should_post_field_access()) { \
2317 JvmtiExport::jni_GetField_probe(thread, NULL, NULL, id->holder(), fieldID, true); \
2318 } \
2319 ret = id->holder()->java_mirror()-> Fieldname##_field (id->offset()); \
2320 return ret;\
2321 JNI_END
2322
2323 DEFINE_GETSTATICFIELD(jboolean, bool, Boolean
2324 , HOTSPOT_JNI_GETSTATICBOOLEANFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICBOOLEANFIELD_RETURN(_ret_ref))
2325 DEFINE_GETSTATICFIELD(jbyte, byte, Byte
2326 , HOTSPOT_JNI_GETSTATICBYTEFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICBYTEFIELD_RETURN(_ret_ref) )
2327 DEFINE_GETSTATICFIELD(jchar, char, Char
2328 , HOTSPOT_JNI_GETSTATICCHARFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICCHARFIELD_RETURN(_ret_ref) )
2329 DEFINE_GETSTATICFIELD(jshort, short, Short
2330 , HOTSPOT_JNI_GETSTATICSHORTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICSHORTFIELD_RETURN(_ret_ref) )
2331 DEFINE_GETSTATICFIELD(jint, int, Int
2332 , HOTSPOT_JNI_GETSTATICINTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICINTFIELD_RETURN(_ret_ref) )
2333 DEFINE_GETSTATICFIELD(jlong, long, Long
2334 , HOTSPOT_JNI_GETSTATICLONGFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICLONGFIELD_RETURN(_ret_ref) )
2335 // Float and double probes don't return value because dtrace doesn't currently support it
2336 DEFINE_GETSTATICFIELD(jfloat, float, Float
2337 , HOTSPOT_JNI_GETSTATICFLOATFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICFLOATFIELD_RETURN() )
2338 DEFINE_GETSTATICFIELD(jdouble, double, Double
2339 , HOTSPOT_JNI_GETSTATICDOUBLEFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICDOUBLEFIELD_RETURN() )
2340
2341 JNI_ENTRY(void, jni_SetStaticObjectField(JNIEnv *env, jclass clazz, jfieldID fieldID, jobject value))
2342 JNIWrapper("SetStaticObjectField");
2343 HOTSPOT_JNI_SETSTATICOBJECTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value);
2344 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID);
2345 assert(id->is_static_field_id(), "invalid static field id");
2346 // Keep JVMTI addition small and only check enabled flag here.
2347 // jni_SetField_probe() assumes that is okay to create handles.
2348 if (JvmtiExport::should_post_field_modification()) {
2349 jvalue field_value;
2350 field_value.l = value;
2351 JvmtiExport::jni_SetField_probe(thread, NULL, NULL, id->holder(), fieldID, true, 'L', (jvalue *)&field_value);
2352 }
2353 id->holder()->java_mirror()->obj_field_put(id->offset(), JNIHandles::resolve(value));
2354 HOTSPOT_JNI_SETSTATICOBJECTFIELD_RETURN();
2355 JNI_END
2356
2357
2358
2359 #define DEFINE_SETSTATICFIELD(Argument,Fieldname,Result,SigType,unionType \
2360 , EntryProbe, ReturnProbe) \
2361 \
2362 JNI_ENTRY(void, jni_SetStatic##Result##Field(JNIEnv *env, jclass clazz, jfieldID fieldID, Argument value)) \
2363 JNIWrapper("SetStatic" XSTR(Result) "Field"); \
2364 EntryProbe; \
2365 \
2366 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID); \
2367 assert(id->is_static_field_id(), "invalid static field id"); \
2368 /* Keep JVMTI addition small and only check enabled flag here. */ \
2369 /* jni_SetField_probe() assumes that is okay to create handles. */ \
2370 if (JvmtiExport::should_post_field_modification()) { \
2371 jvalue field_value; \
2372 field_value.unionType = value; \
2373 JvmtiExport::jni_SetField_probe(thread, NULL, NULL, id->holder(), fieldID, true, SigType, (jvalue *)&field_value); \
2374 } \
2375 if (SigType == 'Z') { value = ((jboolean)value) & 1; } \
2376 id->holder()->java_mirror()-> Fieldname##_field_put (id->offset(), value); \
2377 ReturnProbe;\
2378 JNI_END
2379
2380 DEFINE_SETSTATICFIELD(jboolean, bool, Boolean, 'Z', z
2381 , HOTSPOT_JNI_SETSTATICBOOLEANFIELD_ENTRY(env, clazz, (uintptr_t)fieldID, value),
2382 HOTSPOT_JNI_SETSTATICBOOLEANFIELD_RETURN())
2383 DEFINE_SETSTATICFIELD(jbyte, byte, Byte, 'B', b
2384 , HOTSPOT_JNI_SETSTATICBYTEFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value),
2385 HOTSPOT_JNI_SETSTATICBYTEFIELD_RETURN())
2386 DEFINE_SETSTATICFIELD(jchar, char, Char, 'C', c
2387 , HOTSPOT_JNI_SETSTATICCHARFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value),
2388 HOTSPOT_JNI_SETSTATICCHARFIELD_RETURN())
2389 DEFINE_SETSTATICFIELD(jshort, short, Short, 'S', s
2390 , HOTSPOT_JNI_SETSTATICSHORTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value),
2391 HOTSPOT_JNI_SETSTATICSHORTFIELD_RETURN())
2392 DEFINE_SETSTATICFIELD(jint, int, Int, 'I', i
2393 , HOTSPOT_JNI_SETSTATICINTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value),
2394 HOTSPOT_JNI_SETSTATICINTFIELD_RETURN())
2395 DEFINE_SETSTATICFIELD(jlong, long, Long, 'J', j
2396 , HOTSPOT_JNI_SETSTATICLONGFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value),
2397 HOTSPOT_JNI_SETSTATICLONGFIELD_RETURN())
2398 // Float and double probes don't return value because dtrace doesn't currently support it
2399 DEFINE_SETSTATICFIELD(jfloat, float, Float, 'F', f
2400 , HOTSPOT_JNI_SETSTATICFLOATFIELD_ENTRY(env, clazz, (uintptr_t) fieldID),
2401 HOTSPOT_JNI_SETSTATICFLOATFIELD_RETURN())
2402 DEFINE_SETSTATICFIELD(jdouble, double, Double, 'D', d
2403 , HOTSPOT_JNI_SETSTATICDOUBLEFIELD_ENTRY(env, clazz, (uintptr_t) fieldID),
2404 HOTSPOT_JNI_SETSTATICDOUBLEFIELD_RETURN())
2405
2406 //
2407 // String Operations
2408 //
2409
2410 // Unicode Interface
2411
2412 DT_RETURN_MARK_DECL(NewString, jstring
2413 , HOTSPOT_JNI_NEWSTRING_RETURN(_ret_ref));
2414
2415 JNI_ENTRY(jstring, jni_NewString(JNIEnv *env, const jchar *unicodeChars, jsize len))
2416 JNIWrapper("NewString");
2417 HOTSPOT_JNI_NEWSTRING_ENTRY(env, (uint16_t *) unicodeChars, len);
2418 jstring ret = NULL;
2419 DT_RETURN_MARK(NewString, jstring, (const jstring&)ret);
2420 oop string=java_lang_String::create_oop_from_unicode((jchar*) unicodeChars, len, CHECK_NULL);
2421 ret = (jstring) JNIHandles::make_local(env, string);
2422 return ret;
2423 JNI_END
2424
2425
2426 JNI_QUICK_ENTRY(jsize, jni_GetStringLength(JNIEnv *env, jstring string))
2427 JNIWrapper("GetStringLength");
2428 HOTSPOT_JNI_GETSTRINGLENGTH_ENTRY(env, string);
2429 jsize ret = 0;
2430 oop s = JNIHandles::resolve_non_null(string);
2431 ret = java_lang_String::length(s);
2432 HOTSPOT_JNI_GETSTRINGLENGTH_RETURN(ret);
2433 return ret;
2434 JNI_END
2435
2436
2437 JNI_QUICK_ENTRY(const jchar*, jni_GetStringChars(
2438 JNIEnv *env, jstring string, jboolean *isCopy))
2439 JNIWrapper("GetStringChars");
2440 HOTSPOT_JNI_GETSTRINGCHARS_ENTRY(env, string, (uintptr_t *) isCopy);
2441 jchar* buf = NULL;
2442 oop s = JNIHandles::resolve_non_null(string);
2443 typeArrayOop s_value = java_lang_String::value(s);
2444 if (s_value != NULL) {
2445 int s_len = java_lang_String::length(s, s_value);
2446 bool is_latin1 = java_lang_String::is_latin1(s);
2447 buf = NEW_C_HEAP_ARRAY_RETURN_NULL(jchar, s_len + 1, mtInternal); // add one for zero termination
2448 /* JNI Specification states return NULL on OOM */
2449 if (buf != NULL) {
2450 if (s_len > 0) {
2451 if (!is_latin1) {
2452 ArrayAccess<>::arraycopy_to_native(s_value, (size_t) typeArrayOopDesc::element_offset<jchar>(0),
2453 buf, s_len);
2454 } else {
2455 for (int i = 0; i < s_len; i++) {
2456 buf[i] = ((jchar) s_value->byte_at(i)) & 0xff;
2457 }
2458 }
2459 }
2460 buf[s_len] = 0;
2461 //%note jni_5
2462 if (isCopy != NULL) {
2463 *isCopy = JNI_TRUE;
2464 }
2465 }
2466 }
2467 HOTSPOT_JNI_GETSTRINGCHARS_RETURN(buf);
2468 return buf;
2469 JNI_END
2470
2471
2472 JNI_QUICK_ENTRY(void, jni_ReleaseStringChars(JNIEnv *env, jstring str, const jchar *chars))
2473 JNIWrapper("ReleaseStringChars");
2474 HOTSPOT_JNI_RELEASESTRINGCHARS_ENTRY(env, str, (uint16_t *) chars);
2475 //%note jni_6
2476 if (chars != NULL) {
2477 // Since String objects are supposed to be immutable, don't copy any
2478 // new data back. A bad user will have to go after the char array.
2479 FreeHeap((void*) chars);
2480 }
2481 HOTSPOT_JNI_RELEASESTRINGCHARS_RETURN();
2482 JNI_END
2483
2484
2485 // UTF Interface
2486
2487 DT_RETURN_MARK_DECL(NewStringUTF, jstring
2488 , HOTSPOT_JNI_NEWSTRINGUTF_RETURN(_ret_ref));
2489
2490 JNI_ENTRY(jstring, jni_NewStringUTF(JNIEnv *env, const char *bytes))
2491 JNIWrapper("NewStringUTF");
2492 HOTSPOT_JNI_NEWSTRINGUTF_ENTRY(env, (char *) bytes);
2493 jstring ret;
2494 DT_RETURN_MARK(NewStringUTF, jstring, (const jstring&)ret);
2495
2496 oop result = java_lang_String::create_oop_from_str((char*) bytes, CHECK_NULL);
2497 ret = (jstring) JNIHandles::make_local(env, result);
2498 return ret;
2499 JNI_END
2500
2501
2502 JNI_ENTRY(jsize, jni_GetStringUTFLength(JNIEnv *env, jstring string))
2503 JNIWrapper("GetStringUTFLength");
2504 HOTSPOT_JNI_GETSTRINGUTFLENGTH_ENTRY(env, string);
2505 oop java_string = JNIHandles::resolve_non_null(string);
2506 jsize ret = java_lang_String::utf8_length(java_string);
2507 HOTSPOT_JNI_GETSTRINGUTFLENGTH_RETURN(ret);
2508 return ret;
2509 JNI_END
2510
2511
2512 JNI_ENTRY(const char*, jni_GetStringUTFChars(JNIEnv *env, jstring string, jboolean *isCopy))
2513 JNIWrapper("GetStringUTFChars");
2514 HOTSPOT_JNI_GETSTRINGUTFCHARS_ENTRY(env, string, (uintptr_t *) isCopy);
2515 char* result = NULL;
2516 oop java_string = JNIHandles::resolve_non_null(string);
2517 typeArrayOop s_value = java_lang_String::value(java_string);
2518 if (s_value != NULL) {
2519 size_t length = java_lang_String::utf8_length(java_string, s_value);
2520 /* JNI Specification states return NULL on OOM */
2521 result = AllocateHeap(length + 1, mtInternal, 0, AllocFailStrategy::RETURN_NULL);
2522 if (result != NULL) {
2523 java_lang_String::as_utf8_string(java_string, s_value, result, (int) length + 1);
2524 if (isCopy != NULL) {
2525 *isCopy = JNI_TRUE;
2526 }
2527 }
2528 }
2529 HOTSPOT_JNI_GETSTRINGUTFCHARS_RETURN(result);
2530 return result;
2531 JNI_END
2532
2533
2534 JNI_LEAF(void, jni_ReleaseStringUTFChars(JNIEnv *env, jstring str, const char *chars))
2535 JNIWrapper("ReleaseStringUTFChars");
2536 HOTSPOT_JNI_RELEASESTRINGUTFCHARS_ENTRY(env, str, (char *) chars);
2537 if (chars != NULL) {
2538 FreeHeap((char*) chars);
2539 }
2540 HOTSPOT_JNI_RELEASESTRINGUTFCHARS_RETURN();
2541 JNI_END
2542
2543
2544 JNI_QUICK_ENTRY(jsize, jni_GetArrayLength(JNIEnv *env, jarray array))
2545 JNIWrapper("GetArrayLength");
2546 HOTSPOT_JNI_GETARRAYLENGTH_ENTRY(env, array);
2547 arrayOop a = arrayOop(JNIHandles::resolve_non_null(array));
2548 assert(a->is_array(), "must be array");
2549 jsize ret = a->length();
2550 HOTSPOT_JNI_GETARRAYLENGTH_RETURN(ret);
2551 return ret;
2552 JNI_END
2553
2554
2555 //
2556 // Object Array Operations
2557 //
2558
2559 DT_RETURN_MARK_DECL(NewObjectArray, jobjectArray
2560 , HOTSPOT_JNI_NEWOBJECTARRAY_RETURN(_ret_ref));
2561
2562 JNI_ENTRY(jobjectArray, jni_NewObjectArray(JNIEnv *env, jsize length, jclass elementClass, jobject initialElement))
2563 JNIWrapper("NewObjectArray");
2564 HOTSPOT_JNI_NEWOBJECTARRAY_ENTRY(env, length, elementClass, initialElement);
2565 jobjectArray ret = NULL;
2566 DT_RETURN_MARK(NewObjectArray, jobjectArray, (const jobjectArray&)ret);
2567 Klass* ek = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(elementClass));
2568 Klass* ak = ek->array_klass(CHECK_NULL);
2569 ObjArrayKlass::cast(ak)->initialize(CHECK_NULL);
2570 objArrayOop result = ObjArrayKlass::cast(ak)->allocate(length, CHECK_NULL);
2571 oop initial_value = JNIHandles::resolve(initialElement);
2572 if (initial_value != NULL) { // array already initialized with NULL
2573 for (int index = 0; index < length; index++) {
2574 result->obj_at_put(index, initial_value);
2575 }
2576 }
2577 ret = (jobjectArray) JNIHandles::make_local(env, result);
2578 return ret;
2579 JNI_END
2580
2581 DT_RETURN_MARK_DECL(GetObjectArrayElement, jobject
2582 , HOTSPOT_JNI_GETOBJECTARRAYELEMENT_RETURN(_ret_ref));
2583
2584 JNI_ENTRY(jobject, jni_GetObjectArrayElement(JNIEnv *env, jobjectArray array, jsize index))
2585 JNIWrapper("GetObjectArrayElement");
2586 HOTSPOT_JNI_GETOBJECTARRAYELEMENT_ENTRY(env, array, index);
2587 jobject ret = NULL;
2588 DT_RETURN_MARK(GetObjectArrayElement, jobject, (const jobject&)ret);
2589 objArrayOop a = objArrayOop(JNIHandles::resolve_non_null(array));
2590 if (a->is_within_bounds(index)) {
2591 ret = JNIHandles::make_local(env, a->obj_at(index));
2592 return ret;
2593 } else {
2594 ResourceMark rm(THREAD);
2595 stringStream ss;
2596 ss.print("Index %d out of bounds for length %d", index, a->length());
2597 THROW_MSG_0(vmSymbols::java_lang_ArrayIndexOutOfBoundsException(), ss.as_string());
2598 }
2599 JNI_END
2600
2601 DT_VOID_RETURN_MARK_DECL(SetObjectArrayElement
2602 , HOTSPOT_JNI_SETOBJECTARRAYELEMENT_RETURN());
2603
2604 JNI_ENTRY(void, jni_SetObjectArrayElement(JNIEnv *env, jobjectArray array, jsize index, jobject value))
2605 JNIWrapper("SetObjectArrayElement");
2606 HOTSPOT_JNI_SETOBJECTARRAYELEMENT_ENTRY(env, array, index, value);
2607 DT_VOID_RETURN_MARK(SetObjectArrayElement);
2608
2609 objArrayOop a = objArrayOop(JNIHandles::resolve_non_null(array));
2610 oop v = JNIHandles::resolve(value);
2611 if (a->is_within_bounds(index)) {
2612 if (v == NULL || v->is_a(ObjArrayKlass::cast(a->klass())->element_klass())) {
2613 a->obj_at_put(index, v);
2614 } else {
2615 ResourceMark rm(THREAD);
2616 stringStream ss;
2617 Klass *bottom_kl = ObjArrayKlass::cast(a->klass())->bottom_klass();
2618 ss.print("type mismatch: can not store %s to %s[%d]",
2619 v->klass()->external_name(),
2620 bottom_kl->is_typeArray_klass() ? type2name_tab[ArrayKlass::cast(bottom_kl)->element_type()] : bottom_kl->external_name(),
2621 index);
2622 for (int dims = ArrayKlass::cast(a->klass())->dimension(); dims > 1; --dims) {
2623 ss.print("[]");
2624 }
2625 THROW_MSG(vmSymbols::java_lang_ArrayStoreException(), ss.as_string());
2626 }
2627 } else {
2628 ResourceMark rm(THREAD);
2629 stringStream ss;
2630 ss.print("Index %d out of bounds for length %d", index, a->length());
2631 THROW_MSG(vmSymbols::java_lang_ArrayIndexOutOfBoundsException(), ss.as_string());
2632 }
2633 JNI_END
2634
2635
2636
2637 #define DEFINE_NEWSCALARARRAY(Return,Allocator,Result \
2638 ,EntryProbe,ReturnProbe) \
2639 \
2640 DT_RETURN_MARK_DECL(New##Result##Array, Return \
2641 , ReturnProbe); \
2642 \
2643 JNI_ENTRY(Return, \
2644 jni_New##Result##Array(JNIEnv *env, jsize len)) \
2645 JNIWrapper("New" XSTR(Result) "Array"); \
2646 EntryProbe; \
2647 Return ret = NULL;\
2648 DT_RETURN_MARK(New##Result##Array, Return, (const Return&)ret);\
2649 \
2650 oop obj= oopFactory::Allocator(len, CHECK_0); \
2651 ret = (Return) JNIHandles::make_local(env, obj); \
2652 return ret;\
2653 JNI_END
2654
2655 DEFINE_NEWSCALARARRAY(jbooleanArray, new_boolArray, Boolean,
2656 HOTSPOT_JNI_NEWBOOLEANARRAY_ENTRY(env, len),
2657 HOTSPOT_JNI_NEWBOOLEANARRAY_RETURN(_ret_ref))
2658 DEFINE_NEWSCALARARRAY(jbyteArray, new_byteArray, Byte,
2659 HOTSPOT_JNI_NEWBYTEARRAY_ENTRY(env, len),
2660 HOTSPOT_JNI_NEWBYTEARRAY_RETURN(_ret_ref))
2661 DEFINE_NEWSCALARARRAY(jshortArray, new_shortArray, Short,
2662 HOTSPOT_JNI_NEWSHORTARRAY_ENTRY(env, len),
2663 HOTSPOT_JNI_NEWSHORTARRAY_RETURN(_ret_ref))
2664 DEFINE_NEWSCALARARRAY(jcharArray, new_charArray, Char,
2665 HOTSPOT_JNI_NEWCHARARRAY_ENTRY(env, len),
2666 HOTSPOT_JNI_NEWCHARARRAY_RETURN(_ret_ref))
2667 DEFINE_NEWSCALARARRAY(jintArray, new_intArray, Int,
2668 HOTSPOT_JNI_NEWINTARRAY_ENTRY(env, len),
2669 HOTSPOT_JNI_NEWINTARRAY_RETURN(_ret_ref))
2670 DEFINE_NEWSCALARARRAY(jlongArray, new_longArray, Long,
2671 HOTSPOT_JNI_NEWLONGARRAY_ENTRY(env, len),
2672 HOTSPOT_JNI_NEWLONGARRAY_RETURN(_ret_ref))
2673 DEFINE_NEWSCALARARRAY(jfloatArray, new_floatArray, Float,
2674 HOTSPOT_JNI_NEWFLOATARRAY_ENTRY(env, len),
2675 HOTSPOT_JNI_NEWFLOATARRAY_RETURN(_ret_ref))
2676 DEFINE_NEWSCALARARRAY(jdoubleArray, new_doubleArray, Double,
2677 HOTSPOT_JNI_NEWDOUBLEARRAY_ENTRY(env, len),
2678 HOTSPOT_JNI_NEWDOUBLEARRAY_RETURN(_ret_ref))
2679
2680 // Return an address which will fault if the caller writes to it.
2681
2682 static char* get_bad_address() {
2683 static char* bad_address = NULL;
2684 if (bad_address == NULL) {
2685 size_t size = os::vm_allocation_granularity();
2686 bad_address = os::reserve_memory(size);
2687 if (bad_address != NULL) {
2688 os::protect_memory(bad_address, size, os::MEM_PROT_READ,
2689 /*is_committed*/false);
2690 MemTracker::record_virtual_memory_type((void*)bad_address, mtInternal);
2691 }
2692 }
2693 return bad_address;
2694 }
2695
2696
2697
2698 #define DEFINE_GETSCALARARRAYELEMENTS(ElementTag,ElementType,Result, Tag \
2699 , EntryProbe, ReturnProbe) \
2700 \
2701 JNI_QUICK_ENTRY(ElementType*, \
2702 jni_Get##Result##ArrayElements(JNIEnv *env, ElementType##Array array, jboolean *isCopy)) \
2703 JNIWrapper("Get" XSTR(Result) "ArrayElements"); \
2704 EntryProbe; \
2705 /* allocate an chunk of memory in c land */ \
2706 typeArrayOop a = typeArrayOop(JNIHandles::resolve_non_null(array)); \
2707 ElementType* result; \
2708 int len = a->length(); \
2709 if (len == 0) { \
2710 if (isCopy != NULL) { \
2711 *isCopy = JNI_FALSE; \
2712 } \
2713 /* Empty array: legal but useless, can't return NULL. \
2714 * Return a pointer to something useless. \
2715 * Avoid asserts in typeArrayOop. */ \
2716 result = (ElementType*)get_bad_address(); \
2717 } else { \
2718 /* JNI Specification states return NULL on OOM */ \
2719 result = NEW_C_HEAP_ARRAY_RETURN_NULL(ElementType, len, mtInternal); \
2720 if (result != NULL) { \
2721 /* copy the array to the c chunk */ \
2722 ArrayAccess<>::arraycopy_to_native(a, typeArrayOopDesc::element_offset<ElementType>(0), \
2723 result, len); \
2724 if (isCopy) { \
2725 *isCopy = JNI_TRUE; \
2726 } \
2727 } \
2728 } \
2729 ReturnProbe; \
2730 return result; \
2731 JNI_END
2732
2733 DEFINE_GETSCALARARRAYELEMENTS(T_BOOLEAN, jboolean, Boolean, bool
2734 , HOTSPOT_JNI_GETBOOLEANARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy),
2735 HOTSPOT_JNI_GETBOOLEANARRAYELEMENTS_RETURN((uintptr_t*)result))
2736 DEFINE_GETSCALARARRAYELEMENTS(T_BYTE, jbyte, Byte, byte
2737 , HOTSPOT_JNI_GETBYTEARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy),
2738 HOTSPOT_JNI_GETBYTEARRAYELEMENTS_RETURN((char*)result))
2739 DEFINE_GETSCALARARRAYELEMENTS(T_SHORT, jshort, Short, short
2740 , HOTSPOT_JNI_GETSHORTARRAYELEMENTS_ENTRY(env, (uint16_t*) array, (uintptr_t *) isCopy),
2741 HOTSPOT_JNI_GETSHORTARRAYELEMENTS_RETURN((uint16_t*)result))
2742 DEFINE_GETSCALARARRAYELEMENTS(T_CHAR, jchar, Char, char
2743 , HOTSPOT_JNI_GETCHARARRAYELEMENTS_ENTRY(env, (uint16_t*) array, (uintptr_t *) isCopy),
2744 HOTSPOT_JNI_GETCHARARRAYELEMENTS_RETURN(result))
2745 DEFINE_GETSCALARARRAYELEMENTS(T_INT, jint, Int, int
2746 , HOTSPOT_JNI_GETINTARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy),
2747 HOTSPOT_JNI_GETINTARRAYELEMENTS_RETURN((uint32_t*)result))
2748 DEFINE_GETSCALARARRAYELEMENTS(T_LONG, jlong, Long, long
2749 , HOTSPOT_JNI_GETLONGARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy),
2750 HOTSPOT_JNI_GETLONGARRAYELEMENTS_RETURN(((uintptr_t*)result)))
2751 // Float and double probes don't return value because dtrace doesn't currently support it
2752 DEFINE_GETSCALARARRAYELEMENTS(T_FLOAT, jfloat, Float, float
2753 , HOTSPOT_JNI_GETFLOATARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy),
2754 HOTSPOT_JNI_GETFLOATARRAYELEMENTS_RETURN(result))
2755 DEFINE_GETSCALARARRAYELEMENTS(T_DOUBLE, jdouble, Double, double
2756 , HOTSPOT_JNI_GETDOUBLEARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy),
2757 HOTSPOT_JNI_GETDOUBLEARRAYELEMENTS_RETURN(result))
2758
2759
2760 #define DEFINE_RELEASESCALARARRAYELEMENTS(ElementTag,ElementType,Result,Tag \
2761 , EntryProbe, ReturnProbe);\
2762 \
2763 JNI_QUICK_ENTRY(void, \
2764 jni_Release##Result##ArrayElements(JNIEnv *env, ElementType##Array array, \
2765 ElementType *buf, jint mode)) \
2766 JNIWrapper("Release" XSTR(Result) "ArrayElements"); \
2767 EntryProbe; \
2768 typeArrayOop a = typeArrayOop(JNIHandles::resolve_non_null(array)); \
2769 int len = a->length(); \
2770 if (len != 0) { /* Empty array: nothing to free or copy. */ \
2771 if ((mode == 0) || (mode == JNI_COMMIT)) { \
2772 ArrayAccess<>::arraycopy_from_native(buf, a, typeArrayOopDesc::element_offset<ElementType>(0), len); \
2773 } \
2774 if ((mode == 0) || (mode == JNI_ABORT)) { \
2775 FreeHeap(buf); \
2776 } \
2777 } \
2778 ReturnProbe; \
2779 JNI_END
2780
2781 DEFINE_RELEASESCALARARRAYELEMENTS(T_BOOLEAN, jboolean, Boolean, bool
2782 , HOTSPOT_JNI_RELEASEBOOLEANARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) buf, mode),
2783 HOTSPOT_JNI_RELEASEBOOLEANARRAYELEMENTS_RETURN())
2784 DEFINE_RELEASESCALARARRAYELEMENTS(T_BYTE, jbyte, Byte, byte
2785 , HOTSPOT_JNI_RELEASEBYTEARRAYELEMENTS_ENTRY(env, array, (char *) buf, mode),
2786 HOTSPOT_JNI_RELEASEBYTEARRAYELEMENTS_RETURN())
2787 DEFINE_RELEASESCALARARRAYELEMENTS(T_SHORT, jshort, Short, short
2788 , HOTSPOT_JNI_RELEASESHORTARRAYELEMENTS_ENTRY(env, array, (uint16_t *) buf, mode),
2789 HOTSPOT_JNI_RELEASESHORTARRAYELEMENTS_RETURN())
2790 DEFINE_RELEASESCALARARRAYELEMENTS(T_CHAR, jchar, Char, char
2791 , HOTSPOT_JNI_RELEASECHARARRAYELEMENTS_ENTRY(env, array, (uint16_t *) buf, mode),
2792 HOTSPOT_JNI_RELEASECHARARRAYELEMENTS_RETURN())
2793 DEFINE_RELEASESCALARARRAYELEMENTS(T_INT, jint, Int, int
2794 , HOTSPOT_JNI_RELEASEINTARRAYELEMENTS_ENTRY(env, array, (uint32_t *) buf, mode),
2795 HOTSPOT_JNI_RELEASEINTARRAYELEMENTS_RETURN())
2796 DEFINE_RELEASESCALARARRAYELEMENTS(T_LONG, jlong, Long, long
2797 , HOTSPOT_JNI_RELEASELONGARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) buf, mode),
2798 HOTSPOT_JNI_RELEASELONGARRAYELEMENTS_RETURN())
2799 DEFINE_RELEASESCALARARRAYELEMENTS(T_FLOAT, jfloat, Float, float
2800 , HOTSPOT_JNI_RELEASEFLOATARRAYELEMENTS_ENTRY(env, array, (float *) buf, mode),
2801 HOTSPOT_JNI_RELEASEFLOATARRAYELEMENTS_RETURN())
2802 DEFINE_RELEASESCALARARRAYELEMENTS(T_DOUBLE, jdouble, Double, double
2803 , HOTSPOT_JNI_RELEASEDOUBLEARRAYELEMENTS_ENTRY(env, array, (double *) buf, mode),
2804 HOTSPOT_JNI_RELEASEDOUBLEARRAYELEMENTS_RETURN())
2805
2806 static void check_bounds(jsize start, jsize copy_len, jsize array_len, TRAPS) {
2807 ResourceMark rm(THREAD);
2808 if (copy_len < 0) {
2809 stringStream ss;
2810 ss.print("Length %d is negative", copy_len);
2811 THROW_MSG(vmSymbols::java_lang_ArrayIndexOutOfBoundsException(), ss.as_string());
2812 } else if (start < 0 || (start > array_len - copy_len)) {
2813 stringStream ss;
2814 ss.print("Array region %d.." INT64_FORMAT " out of bounds for length %d",
2815 start, (int64_t)start+(int64_t)copy_len, array_len);
2816 THROW_MSG(vmSymbols::java_lang_ArrayIndexOutOfBoundsException(), ss.as_string());
2817 }
2818 }
2819
2820 #define DEFINE_GETSCALARARRAYREGION(ElementTag,ElementType,Result, Tag \
2821 , EntryProbe, ReturnProbe); \
2822 DT_VOID_RETURN_MARK_DECL(Get##Result##ArrayRegion \
2823 , ReturnProbe); \
2824 \
2825 JNI_ENTRY(void, \
2826 jni_Get##Result##ArrayRegion(JNIEnv *env, ElementType##Array array, jsize start, \
2827 jsize len, ElementType *buf)) \
2828 JNIWrapper("Get" XSTR(Result) "ArrayRegion"); \
2829 EntryProbe; \
2830 DT_VOID_RETURN_MARK(Get##Result##ArrayRegion); \
2831 typeArrayOop src = typeArrayOop(JNIHandles::resolve_non_null(array)); \
2832 check_bounds(start, len, src->length(), CHECK); \
2833 if (len > 0) { \
2834 ArrayAccess<>::arraycopy_to_native(src, typeArrayOopDesc::element_offset<ElementType>(start), buf, len); \
2835 } \
2836 JNI_END
2837
2838 DEFINE_GETSCALARARRAYREGION(T_BOOLEAN, jboolean,Boolean, bool
2839 , HOTSPOT_JNI_GETBOOLEANARRAYREGION_ENTRY(env, array, start, len, (uintptr_t *) buf),
2840 HOTSPOT_JNI_GETBOOLEANARRAYREGION_RETURN());
2841 DEFINE_GETSCALARARRAYREGION(T_BYTE, jbyte, Byte, byte
2842 , HOTSPOT_JNI_GETBYTEARRAYREGION_ENTRY(env, array, start, len, (char *) buf),
2843 HOTSPOT_JNI_GETBYTEARRAYREGION_RETURN());
2844 DEFINE_GETSCALARARRAYREGION(T_SHORT, jshort, Short, short
2845 , HOTSPOT_JNI_GETSHORTARRAYREGION_ENTRY(env, array, start, len, (uint16_t *) buf),
2846 HOTSPOT_JNI_GETSHORTARRAYREGION_RETURN());
2847 DEFINE_GETSCALARARRAYREGION(T_CHAR, jchar, Char, char
2848 , HOTSPOT_JNI_GETCHARARRAYREGION_ENTRY(env, array, start, len, (uint16_t*) buf),
2849 HOTSPOT_JNI_GETCHARARRAYREGION_RETURN());
2850 DEFINE_GETSCALARARRAYREGION(T_INT, jint, Int, int
2851 , HOTSPOT_JNI_GETINTARRAYREGION_ENTRY(env, array, start, len, (uint32_t*) buf),
2852 HOTSPOT_JNI_GETINTARRAYREGION_RETURN());
2853 DEFINE_GETSCALARARRAYREGION(T_LONG, jlong, Long, long
2854 , HOTSPOT_JNI_GETLONGARRAYREGION_ENTRY(env, array, start, len, (uintptr_t *) buf),
2855 HOTSPOT_JNI_GETLONGARRAYREGION_RETURN());
2856 DEFINE_GETSCALARARRAYREGION(T_FLOAT, jfloat, Float, float
2857 , HOTSPOT_JNI_GETFLOATARRAYREGION_ENTRY(env, array, start, len, (float *) buf),
2858 HOTSPOT_JNI_GETFLOATARRAYREGION_RETURN());
2859 DEFINE_GETSCALARARRAYREGION(T_DOUBLE, jdouble, Double, double
2860 , HOTSPOT_JNI_GETDOUBLEARRAYREGION_ENTRY(env, array, start, len, (double *) buf),
2861 HOTSPOT_JNI_GETDOUBLEARRAYREGION_RETURN());
2862
2863
2864 #define DEFINE_SETSCALARARRAYREGION(ElementTag,ElementType,Result, Tag \
2865 , EntryProbe, ReturnProbe); \
2866 DT_VOID_RETURN_MARK_DECL(Set##Result##ArrayRegion \
2867 ,ReturnProbe); \
2868 \
2869 JNI_ENTRY(void, \
2870 jni_Set##Result##ArrayRegion(JNIEnv *env, ElementType##Array array, jsize start, \
2871 jsize len, const ElementType *buf)) \
2872 JNIWrapper("Set" XSTR(Result) "ArrayRegion"); \
2873 EntryProbe; \
2874 DT_VOID_RETURN_MARK(Set##Result##ArrayRegion); \
2875 typeArrayOop dst = typeArrayOop(JNIHandles::resolve_non_null(array)); \
2876 check_bounds(start, len, dst->length(), CHECK); \
2877 if (len > 0) { \
2878 ArrayAccess<>::arraycopy_from_native(buf, dst, typeArrayOopDesc::element_offset<ElementType>(start), len); \
2879 } \
2880 JNI_END
2881
2882 DEFINE_SETSCALARARRAYREGION(T_BOOLEAN, jboolean, Boolean, bool
2883 , HOTSPOT_JNI_SETBOOLEANARRAYREGION_ENTRY(env, array, start, len, (uintptr_t *)buf),
2884 HOTSPOT_JNI_SETBOOLEANARRAYREGION_RETURN())
2885 DEFINE_SETSCALARARRAYREGION(T_BYTE, jbyte, Byte, byte
2886 , HOTSPOT_JNI_SETBYTEARRAYREGION_ENTRY(env, array, start, len, (char *) buf),
2887 HOTSPOT_JNI_SETBYTEARRAYREGION_RETURN())
2888 DEFINE_SETSCALARARRAYREGION(T_SHORT, jshort, Short, short
2889 , HOTSPOT_JNI_SETSHORTARRAYREGION_ENTRY(env, array, start, len, (uint16_t *) buf),
2890 HOTSPOT_JNI_SETSHORTARRAYREGION_RETURN())
2891 DEFINE_SETSCALARARRAYREGION(T_CHAR, jchar, Char, char
2892 , HOTSPOT_JNI_SETCHARARRAYREGION_ENTRY(env, array, start, len, (uint16_t *) buf),
2893 HOTSPOT_JNI_SETCHARARRAYREGION_RETURN())
2894 DEFINE_SETSCALARARRAYREGION(T_INT, jint, Int, int
2895 , HOTSPOT_JNI_SETINTARRAYREGION_ENTRY(env, array, start, len, (uint32_t *) buf),
2896 HOTSPOT_JNI_SETINTARRAYREGION_RETURN())
2897 DEFINE_SETSCALARARRAYREGION(T_LONG, jlong, Long, long
2898 , HOTSPOT_JNI_SETLONGARRAYREGION_ENTRY(env, array, start, len, (uintptr_t *) buf),
2899 HOTSPOT_JNI_SETLONGARRAYREGION_RETURN())
2900 DEFINE_SETSCALARARRAYREGION(T_FLOAT, jfloat, Float, float
2901 , HOTSPOT_JNI_SETFLOATARRAYREGION_ENTRY(env, array, start, len, (float *) buf),
2902 HOTSPOT_JNI_SETFLOATARRAYREGION_RETURN())
2903 DEFINE_SETSCALARARRAYREGION(T_DOUBLE, jdouble, Double, double
2904 , HOTSPOT_JNI_SETDOUBLEARRAYREGION_ENTRY(env, array, start, len, (double *) buf),
2905 HOTSPOT_JNI_SETDOUBLEARRAYREGION_RETURN())
2906
2907
2908 //
2909 // Interception of natives
2910 //
2911
2912 // The RegisterNatives call being attempted tried to register with a method that
2913 // is not native. Ask JVM TI what prefixes have been specified. Then check
2914 // to see if the native method is now wrapped with the prefixes. See the
2915 // SetNativeMethodPrefix(es) functions in the JVM TI Spec for details.
2916 static Method* find_prefixed_native(Klass* k, Symbol* name, Symbol* signature, TRAPS) {
2917 #if INCLUDE_JVMTI
2918 ResourceMark rm(THREAD);
2919 Method* method;
2920 int name_len = name->utf8_length();
2921 char* name_str = name->as_utf8();
2922 int prefix_count;
2923 char** prefixes = JvmtiExport::get_all_native_method_prefixes(&prefix_count);
2924 for (int i = 0; i < prefix_count; i++) {
2925 char* prefix = prefixes[i];
2926 int prefix_len = (int)strlen(prefix);
2927
2928 // try adding this prefix to the method name and see if it matches another method name
2929 int trial_len = name_len + prefix_len;
2930 char* trial_name_str = NEW_RESOURCE_ARRAY(char, trial_len + 1);
2931 strcpy(trial_name_str, prefix);
2932 strcat(trial_name_str, name_str);
2933 TempNewSymbol trial_name = SymbolTable::probe(trial_name_str, trial_len);
2934 if (trial_name == NULL) {
2935 continue; // no such symbol, so this prefix wasn't used, try the next prefix
2936 }
2937 method = k->lookup_method(trial_name, signature);
2938 if (method == NULL) {
2939 continue; // signature doesn't match, try the next prefix
2940 }
2941 if (method->is_native()) {
2942 method->set_is_prefixed_native();
2943 return method; // wahoo, we found a prefixed version of the method, return it
2944 }
2945 // found as non-native, so prefix is good, add it, probably just need more prefixes
2946 name_len = trial_len;
2947 name_str = trial_name_str;
2948 }
2949 #endif // INCLUDE_JVMTI
2950 return NULL; // not found
2951 }
2952
2953 static bool register_native(Klass* k, Symbol* name, Symbol* signature, address entry, TRAPS) {
2954 Method* method = k->lookup_method(name, signature);
2955 if (method == NULL) {
2956 ResourceMark rm;
2957 stringStream st;
2958 st.print("Method %s name or signature does not match",
2959 Method::name_and_sig_as_C_string(k, name, signature));
2960 THROW_MSG_(vmSymbols::java_lang_NoSuchMethodError(), st.as_string(), false);
2961 }
2962 if (!method->is_native()) {
2963 // trying to register to a non-native method, see if a JVM TI agent has added prefix(es)
2964 method = find_prefixed_native(k, name, signature, THREAD);
2965 if (method == NULL) {
2966 ResourceMark rm;
2967 stringStream st;
2968 st.print("Method %s is not declared as native",
2969 Method::name_and_sig_as_C_string(k, name, signature));
2970 THROW_MSG_(vmSymbols::java_lang_NoSuchMethodError(), st.as_string(), false);
2971 }
2972 }
2973
2974 if (entry != NULL) {
2975 method->set_native_function(entry,
2976 Method::native_bind_event_is_interesting);
2977 } else {
2978 method->clear_native_function();
2979 }
2980 if (PrintJNIResolving) {
2981 ResourceMark rm(THREAD);
2982 tty->print_cr("[Registering JNI native method %s.%s]",
2983 method->method_holder()->external_name(),
2984 method->name()->as_C_string());
2985 }
2986 return true;
2987 }
2988
2989 DT_RETURN_MARK_DECL(RegisterNatives, jint
2990 , HOTSPOT_JNI_REGISTERNATIVES_RETURN(_ret_ref));
2991
2992 JNI_ENTRY(jint, jni_RegisterNatives(JNIEnv *env, jclass clazz,
2993 const JNINativeMethod *methods,
2994 jint nMethods))
2995 JNIWrapper("RegisterNatives");
2996 HOTSPOT_JNI_REGISTERNATIVES_ENTRY(env, clazz, (void *) methods, nMethods);
2997 jint ret = 0;
2998 DT_RETURN_MARK(RegisterNatives, jint, (const jint&)ret);
2999
3000 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz));
3001
3002 for (int index = 0; index < nMethods; index++) {
3003 const char* meth_name = methods[index].name;
3004 const char* meth_sig = methods[index].signature;
3005 int meth_name_len = (int)strlen(meth_name);
3006
3007 // The class should have been loaded (we have an instance of the class
3008 // passed in) so the method and signature should already be in the symbol
3009 // table. If they're not there, the method doesn't exist.
3010 TempNewSymbol name = SymbolTable::probe(meth_name, meth_name_len);
3011 TempNewSymbol signature = SymbolTable::probe(meth_sig, (int)strlen(meth_sig));
3012
3013 if (name == NULL || signature == NULL) {
3014 ResourceMark rm;
3015 stringStream st;
3016 st.print("Method %s.%s%s not found", k->external_name(), meth_name, meth_sig);
3017 // Must return negative value on failure
3018 THROW_MSG_(vmSymbols::java_lang_NoSuchMethodError(), st.as_string(), -1);
3019 }
3020
3021 bool res = register_native(k, name, signature,
3022 (address) methods[index].fnPtr, THREAD);
3023 if (!res) {
3024 ret = -1;
3025 break;
3026 }
3027 }
3028 return ret;
3029 JNI_END
3030
3031
3032 JNI_ENTRY(jint, jni_UnregisterNatives(JNIEnv *env, jclass clazz))
3033 JNIWrapper("UnregisterNatives");
3034 HOTSPOT_JNI_UNREGISTERNATIVES_ENTRY(env, clazz);
3035 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz));
3036 //%note jni_2
3037 if (k->is_instance_klass()) {
3038 for (int index = 0; index < InstanceKlass::cast(k)->methods()->length(); index++) {
3039 Method* m = InstanceKlass::cast(k)->methods()->at(index);
3040 if (m->is_native()) {
3041 m->clear_native_function();
3042 m->set_signature_handler(NULL);
3043 }
3044 }
3045 }
3046 HOTSPOT_JNI_UNREGISTERNATIVES_RETURN(0);
3047 return 0;
3048 JNI_END
3049
3050 //
3051 // Monitor functions
3052 //
3053
3054 DT_RETURN_MARK_DECL(MonitorEnter, jint
3055 , HOTSPOT_JNI_MONITORENTER_RETURN(_ret_ref));
3056
3057 JNI_ENTRY(jint, jni_MonitorEnter(JNIEnv *env, jobject jobj))
3058 HOTSPOT_JNI_MONITORENTER_ENTRY(env, jobj);
3059 jint ret = JNI_ERR;
3060 DT_RETURN_MARK(MonitorEnter, jint, (const jint&)ret);
3061
3062 // If the object is null, we can't do anything with it
3063 if (jobj == NULL) {
3064 THROW_(vmSymbols::java_lang_NullPointerException(), JNI_ERR);
3065 }
3066
3067 Handle obj(thread, JNIHandles::resolve_non_null(jobj));
3068 ObjectSynchronizer::jni_enter(obj, CHECK_(JNI_ERR));
3069 ret = JNI_OK;
3070 return ret;
3071 JNI_END
3072
3073 DT_RETURN_MARK_DECL(MonitorExit, jint
3074 , HOTSPOT_JNI_MONITOREXIT_RETURN(_ret_ref));
3075
3076 JNI_ENTRY(jint, jni_MonitorExit(JNIEnv *env, jobject jobj))
3077 HOTSPOT_JNI_MONITOREXIT_ENTRY(env, jobj);
3078 jint ret = JNI_ERR;
3079 DT_RETURN_MARK(MonitorExit, jint, (const jint&)ret);
3080
3081 // Don't do anything with a null object
3082 if (jobj == NULL) {
3083 THROW_(vmSymbols::java_lang_NullPointerException(), JNI_ERR);
3084 }
3085
3086 Handle obj(THREAD, JNIHandles::resolve_non_null(jobj));
3087 ObjectSynchronizer::jni_exit(obj(), CHECK_(JNI_ERR));
3088
3089 ret = JNI_OK;
3090 return ret;
3091 JNI_END
3092
3093 //
3094 // Extensions
3095 //
3096
3097 DT_VOID_RETURN_MARK_DECL(GetStringRegion
3098 , HOTSPOT_JNI_GETSTRINGREGION_RETURN());
3099
3100 JNI_ENTRY(void, jni_GetStringRegion(JNIEnv *env, jstring string, jsize start, jsize len, jchar *buf))
3101 JNIWrapper("GetStringRegion");
3102 HOTSPOT_JNI_GETSTRINGREGION_ENTRY(env, string, start, len, buf);
3103 DT_VOID_RETURN_MARK(GetStringRegion);
3104 oop s = JNIHandles::resolve_non_null(string);
3105 typeArrayOop s_value = java_lang_String::value(s);
3106 int s_len = java_lang_String::length(s, s_value);
3107 if (start < 0 || len < 0 || start > s_len - len) {
3108 THROW(vmSymbols::java_lang_StringIndexOutOfBoundsException());
3109 } else {
3110 if (len > 0) {
3111 bool is_latin1 = java_lang_String::is_latin1(s);
3112 if (!is_latin1) {
3113 ArrayAccess<>::arraycopy_to_native(s_value, typeArrayOopDesc::element_offset<jchar>(start),
3114 buf, len);
3115 } else {
3116 for (int i = 0; i < len; i++) {
3117 buf[i] = ((jchar) s_value->byte_at(i + start)) & 0xff;
3118 }
3119 }
3120 }
3121 }
3122 JNI_END
3123
3124 DT_VOID_RETURN_MARK_DECL(GetStringUTFRegion
3125 , HOTSPOT_JNI_GETSTRINGUTFREGION_RETURN());
3126
3127 JNI_ENTRY(void, jni_GetStringUTFRegion(JNIEnv *env, jstring string, jsize start, jsize len, char *buf))
3128 JNIWrapper("GetStringUTFRegion");
3129 HOTSPOT_JNI_GETSTRINGUTFREGION_ENTRY(env, string, start, len, buf);
3130 DT_VOID_RETURN_MARK(GetStringUTFRegion);
3131 oop s = JNIHandles::resolve_non_null(string);
3132 typeArrayOop s_value = java_lang_String::value(s);
3133 int s_len = java_lang_String::length(s, s_value);
3134 if (start < 0 || len < 0 || start > s_len - len) {
3135 THROW(vmSymbols::java_lang_StringIndexOutOfBoundsException());
3136 } else {
3137 //%note jni_7
3138 if (len > 0) {
3139 // Assume the buffer is large enough as the JNI spec. does not require user error checking
3140 java_lang_String::as_utf8_string(s, s_value, start, len, buf, INT_MAX);
3141 // as_utf8_string null-terminates the result string
3142 } else {
3143 // JDK null-terminates the buffer even in len is zero
3144 if (buf != NULL) {
3145 buf[0] = 0;
3146 }
3147 }
3148 }
3149 JNI_END
3150
3151 static oop lock_gc_or_pin_object(JavaThread* thread, jobject obj) {
3152 if (Universe::heap()->supports_object_pinning()) {
3153 const oop o = JNIHandles::resolve_non_null(obj);
3154 return Universe::heap()->pin_object(thread, o);
3155 } else {
3156 GCLocker::lock_critical(thread);
3157 return JNIHandles::resolve_non_null(obj);
3158 }
3159 }
3160
3161 static void unlock_gc_or_unpin_object(JavaThread* thread, jobject obj) {
3162 if (Universe::heap()->supports_object_pinning()) {
3163 const oop o = JNIHandles::resolve_non_null(obj);
3164 return Universe::heap()->unpin_object(thread, o);
3165 } else {
3166 GCLocker::unlock_critical(thread);
3167 }
3168 }
3169
3170 JNI_ENTRY(void*, jni_GetPrimitiveArrayCritical(JNIEnv *env, jarray array, jboolean *isCopy))
3171 JNIWrapper("GetPrimitiveArrayCritical");
3172 HOTSPOT_JNI_GETPRIMITIVEARRAYCRITICAL_ENTRY(env, array, (uintptr_t *) isCopy);
3173 if (isCopy != NULL) {
3174 *isCopy = JNI_FALSE;
3175 }
3176 oop a = lock_gc_or_pin_object(thread, array);
3177 assert(a->is_array(), "just checking");
3178 BasicType type;
3179 if (a->is_objArray()) {
3180 type = T_OBJECT;
3181 } else {
3182 type = TypeArrayKlass::cast(a->klass())->element_type();
3183 }
3184 void* ret = arrayOop(a)->base(type);
3185 HOTSPOT_JNI_GETPRIMITIVEARRAYCRITICAL_RETURN(ret);
3186 return ret;
3187 JNI_END
3188
3189
3190 JNI_ENTRY(void, jni_ReleasePrimitiveArrayCritical(JNIEnv *env, jarray array, void *carray, jint mode))
3191 JNIWrapper("ReleasePrimitiveArrayCritical");
3192 HOTSPOT_JNI_RELEASEPRIMITIVEARRAYCRITICAL_ENTRY(env, array, carray, mode);
3193 unlock_gc_or_unpin_object(thread, array);
3194 HOTSPOT_JNI_RELEASEPRIMITIVEARRAYCRITICAL_RETURN();
3195 JNI_END
3196
3197
3198 JNI_ENTRY(const jchar*, jni_GetStringCritical(JNIEnv *env, jstring string, jboolean *isCopy))
3199 JNIWrapper("GetStringCritical");
3200 HOTSPOT_JNI_GETSTRINGCRITICAL_ENTRY(env, string, (uintptr_t *) isCopy);
3201 oop s = lock_gc_or_pin_object(thread, string);
3202 typeArrayOop s_value = java_lang_String::value(s);
3203 bool is_latin1 = java_lang_String::is_latin1(s);
3204 if (isCopy != NULL) {
3205 *isCopy = is_latin1 ? JNI_TRUE : JNI_FALSE;
3206 }
3207 jchar* ret;
3208 if (!is_latin1) {
3209 ret = (jchar*) s_value->base(T_CHAR);
3210 } else {
3211 // Inflate latin1 encoded string to UTF16
3212 int s_len = java_lang_String::length(s, s_value);
3213 ret = NEW_C_HEAP_ARRAY_RETURN_NULL(jchar, s_len + 1, mtInternal); // add one for zero termination
3214 /* JNI Specification states return NULL on OOM */
3215 if (ret != NULL) {
3216 for (int i = 0; i < s_len; i++) {
3217 ret[i] = ((jchar) s_value->byte_at(i)) & 0xff;
3218 }
3219 ret[s_len] = 0;
3220 }
3221 }
3222 HOTSPOT_JNI_GETSTRINGCRITICAL_RETURN((uint16_t *) ret);
3223 return ret;
3224 JNI_END
3225
3226
3227 JNI_ENTRY(void, jni_ReleaseStringCritical(JNIEnv *env, jstring str, const jchar *chars))
3228 JNIWrapper("ReleaseStringCritical");
3229 HOTSPOT_JNI_RELEASESTRINGCRITICAL_ENTRY(env, str, (uint16_t *) chars);
3230 // The str and chars arguments are ignored for UTF16 strings
3231 oop s = JNIHandles::resolve_non_null(str);
3232 bool is_latin1 = java_lang_String::is_latin1(s);
3233 if (is_latin1) {
3234 // For latin1 string, free jchar array allocated by earlier call to GetStringCritical.
3235 // This assumes that ReleaseStringCritical bookends GetStringCritical.
3236 FREE_C_HEAP_ARRAY(jchar, chars);
3237 }
3238 unlock_gc_or_unpin_object(thread, str);
3239 HOTSPOT_JNI_RELEASESTRINGCRITICAL_RETURN();
3240 JNI_END
3241
3242
3243 JNI_ENTRY(jweak, jni_NewWeakGlobalRef(JNIEnv *env, jobject ref))
3244 JNIWrapper("jni_NewWeakGlobalRef");
3245 HOTSPOT_JNI_NEWWEAKGLOBALREF_ENTRY(env, ref);
3246 Handle ref_handle(thread, JNIHandles::resolve(ref));
3247 jweak ret = JNIHandles::make_weak_global(ref_handle);
3248 HOTSPOT_JNI_NEWWEAKGLOBALREF_RETURN(ret);
3249 return ret;
3250 JNI_END
3251
3252 // Must be JNI_ENTRY (with HandleMark)
3253 JNI_ENTRY(void, jni_DeleteWeakGlobalRef(JNIEnv *env, jweak ref))
3254 JNIWrapper("jni_DeleteWeakGlobalRef");
3255 HOTSPOT_JNI_DELETEWEAKGLOBALREF_ENTRY(env, ref);
3256 JNIHandles::destroy_weak_global(ref);
3257 HOTSPOT_JNI_DELETEWEAKGLOBALREF_RETURN();
3258 JNI_END
3259
3260
3261 JNI_QUICK_ENTRY(jboolean, jni_ExceptionCheck(JNIEnv *env))
3262 JNIWrapper("jni_ExceptionCheck");
3263 HOTSPOT_JNI_EXCEPTIONCHECK_ENTRY(env);
3264 jni_check_async_exceptions(thread);
3265 jboolean ret = (thread->has_pending_exception()) ? JNI_TRUE : JNI_FALSE;
3266 HOTSPOT_JNI_EXCEPTIONCHECK_RETURN(ret);
3267 return ret;
3268 JNI_END
3269
3270
3271 // Initialization state for three routines below relating to
3272 // java.nio.DirectBuffers
3273 static int directBufferSupportInitializeStarted = 0;
3274 static volatile int directBufferSupportInitializeEnded = 0;
3275 static volatile int directBufferSupportInitializeFailed = 0;
3276 static jclass bufferClass = NULL;
3277 static jclass directBufferClass = NULL;
3278 static jclass directByteBufferClass = NULL;
3279 static jmethodID directByteBufferConstructor = NULL;
3280 static jfieldID directBufferAddressField = NULL;
3281 static jfieldID bufferCapacityField = NULL;
3282
3283 static jclass lookupOne(JNIEnv* env, const char* name, TRAPS) {
3284 Handle loader; // null (bootstrap) loader
3285 Handle protection_domain; // null protection domain
3286
3287 TempNewSymbol sym = SymbolTable::new_symbol(name, CHECK_NULL);
3288 jclass result = find_class_from_class_loader(env, sym, true, loader, protection_domain, true, CHECK_NULL);
3289
3290 if (log_is_enabled(Debug, class, resolve) && result != NULL) {
3291 trace_class_resolution(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(result)));
3292 }
3293 return result;
3294 }
3295
3296 // These lookups are done with the NULL (bootstrap) ClassLoader to
3297 // circumvent any security checks that would be done by jni_FindClass.
3298 JNI_ENTRY(bool, lookupDirectBufferClasses(JNIEnv* env))
3299 {
3300 if ((bufferClass = lookupOne(env, "java/nio/Buffer", thread)) == NULL) { return false; }
3301 if ((directBufferClass = lookupOne(env, "sun/nio/ch/DirectBuffer", thread)) == NULL) { return false; }
3302 if ((directByteBufferClass = lookupOne(env, "java/nio/DirectByteBuffer", thread)) == NULL) { return false; }
3303 return true;
3304 }
3305 JNI_END
3306
3307
3308 static bool initializeDirectBufferSupport(JNIEnv* env, JavaThread* thread) {
3309 if (directBufferSupportInitializeFailed) {
3310 return false;
3311 }
3312
3313 if (Atomic::cmpxchg(1, &directBufferSupportInitializeStarted, 0) == 0) {
3314 if (!lookupDirectBufferClasses(env)) {
3315 directBufferSupportInitializeFailed = 1;
3316 return false;
3317 }
3318
3319 // Make global references for these
3320 bufferClass = (jclass) env->NewGlobalRef(bufferClass);
3321 directBufferClass = (jclass) env->NewGlobalRef(directBufferClass);
3322 directByteBufferClass = (jclass) env->NewGlobalRef(directByteBufferClass);
3323
3324 // Get needed field and method IDs
3325 directByteBufferConstructor = env->GetMethodID(directByteBufferClass, "<init>", "(JI)V");
3326 if (env->ExceptionCheck()) {
3327 env->ExceptionClear();
3328 directBufferSupportInitializeFailed = 1;
3329 return false;
3330 }
3331 directBufferAddressField = env->GetFieldID(bufferClass, "address", "J");
3332 if (env->ExceptionCheck()) {
3333 env->ExceptionClear();
3334 directBufferSupportInitializeFailed = 1;
3335 return false;
3336 }
3337 bufferCapacityField = env->GetFieldID(bufferClass, "capacity", "I");
3338 if (env->ExceptionCheck()) {
3339 env->ExceptionClear();
3340 directBufferSupportInitializeFailed = 1;
3341 return false;
3342 }
3343
3344 if ((directByteBufferConstructor == NULL) ||
3345 (directBufferAddressField == NULL) ||
3346 (bufferCapacityField == NULL)) {
3347 directBufferSupportInitializeFailed = 1;
3348 return false;
3349 }
3350
3351 directBufferSupportInitializeEnded = 1;
3352 } else {
3353 while (!directBufferSupportInitializeEnded && !directBufferSupportInitializeFailed) {
3354 os::naked_yield();
3355 }
3356 }
3357
3358 return !directBufferSupportInitializeFailed;
3359 }
3360
3361 extern "C" jobject JNICALL jni_NewDirectByteBuffer(JNIEnv *env, void* address, jlong capacity)
3362 {
3363 // thread_from_jni_environment() will block if VM is gone.
3364 JavaThread* thread = JavaThread::thread_from_jni_environment(env);
3365
3366 JNIWrapper("jni_NewDirectByteBuffer");
3367 HOTSPOT_JNI_NEWDIRECTBYTEBUFFER_ENTRY(env, address, capacity);
3368
3369 if (!directBufferSupportInitializeEnded) {
3370 if (!initializeDirectBufferSupport(env, thread)) {
3371 HOTSPOT_JNI_NEWDIRECTBYTEBUFFER_RETURN(NULL);
3372 return NULL;
3373 }
3374 }
3375
3376 // Being paranoid about accidental sign extension on address
3377 jlong addr = (jlong) ((uintptr_t) address);
3378 // NOTE that package-private DirectByteBuffer constructor currently
3379 // takes int capacity
3380 jint cap = (jint) capacity;
3381 jobject ret = env->NewObject(directByteBufferClass, directByteBufferConstructor, addr, cap);
3382 HOTSPOT_JNI_NEWDIRECTBYTEBUFFER_RETURN(ret);
3383 return ret;
3384 }
3385
3386 DT_RETURN_MARK_DECL(GetDirectBufferAddress, void*
3387 , HOTSPOT_JNI_GETDIRECTBUFFERADDRESS_RETURN((void*) _ret_ref));
3388
3389 extern "C" void* JNICALL jni_GetDirectBufferAddress(JNIEnv *env, jobject buf)
3390 {
3391 // thread_from_jni_environment() will block if VM is gone.
3392 JavaThread* thread = JavaThread::thread_from_jni_environment(env);
3393
3394 JNIWrapper("jni_GetDirectBufferAddress");
3395 HOTSPOT_JNI_GETDIRECTBUFFERADDRESS_ENTRY(env, buf);
3396 void* ret = NULL;
3397 DT_RETURN_MARK(GetDirectBufferAddress, void*, (const void*&)ret);
3398
3399 if (!directBufferSupportInitializeEnded) {
3400 if (!initializeDirectBufferSupport(env, thread)) {
3401 return 0;
3402 }
3403 }
3404
3405 if ((buf != NULL) && (!env->IsInstanceOf(buf, directBufferClass))) {
3406 return 0;
3407 }
3408
3409 ret = (void*)(intptr_t)env->GetLongField(buf, directBufferAddressField);
3410 return ret;
3411 }
3412
3413 DT_RETURN_MARK_DECL(GetDirectBufferCapacity, jlong
3414 , HOTSPOT_JNI_GETDIRECTBUFFERCAPACITY_RETURN(_ret_ref));
3415
3416 extern "C" jlong JNICALL jni_GetDirectBufferCapacity(JNIEnv *env, jobject buf)
3417 {
3418 // thread_from_jni_environment() will block if VM is gone.
3419 JavaThread* thread = JavaThread::thread_from_jni_environment(env);
3420
3421 JNIWrapper("jni_GetDirectBufferCapacity");
3422 HOTSPOT_JNI_GETDIRECTBUFFERCAPACITY_ENTRY(env, buf);
3423 jlong ret = -1;
3424 DT_RETURN_MARK(GetDirectBufferCapacity, jlong, (const jlong&)ret);
3425
3426 if (!directBufferSupportInitializeEnded) {
3427 if (!initializeDirectBufferSupport(env, thread)) {
3428 ret = 0;
3429 return ret;
3430 }
3431 }
3432
3433 if (buf == NULL) {
3434 return -1;
3435 }
3436
3437 if (!env->IsInstanceOf(buf, directBufferClass)) {
3438 return -1;
3439 }
3440
3441 // NOTE that capacity is currently an int in the implementation
3442 ret = env->GetIntField(buf, bufferCapacityField);
3443 return ret;
3444 }
3445
3446
3447 JNI_LEAF(jint, jni_GetVersion(JNIEnv *env))
3448 JNIWrapper("GetVersion");
3449 HOTSPOT_JNI_GETVERSION_ENTRY(env);
3450 HOTSPOT_JNI_GETVERSION_RETURN(CurrentVersion);
3451 return CurrentVersion;
3452 JNI_END
3453
3454 extern struct JavaVM_ main_vm;
3455
3456 JNI_LEAF(jint, jni_GetJavaVM(JNIEnv *env, JavaVM **vm))
3457 JNIWrapper("jni_GetJavaVM");
3458 HOTSPOT_JNI_GETJAVAVM_ENTRY(env, (void **) vm);
3459 *vm = (JavaVM *)(&main_vm);
3460 HOTSPOT_JNI_GETJAVAVM_RETURN(JNI_OK);
3461 return JNI_OK;
3462 JNI_END
3463
3464
3465 JNI_ENTRY(jobject, jni_GetModule(JNIEnv* env, jclass clazz))
3466 JNIWrapper("GetModule");
3467 return Modules::get_module(clazz, THREAD);
3468 JNI_END
3469
3470
3471 // Structure containing all jni functions
3472 struct JNINativeInterface_ jni_NativeInterface = {
3473 NULL,
3474 NULL,
3475 NULL,
3476
3477 NULL,
3478
3479 jni_GetVersion,
3480
3481 jni_DefineClass,
3482 jni_FindClass,
3483
3484 jni_FromReflectedMethod,
3485 jni_FromReflectedField,
3486
3487 jni_ToReflectedMethod,
3488
3489 jni_GetSuperclass,
3490 jni_IsAssignableFrom,
3491
3492 jni_ToReflectedField,
3493
3494 jni_Throw,
3495 jni_ThrowNew,
3496 jni_ExceptionOccurred,
3497 jni_ExceptionDescribe,
3498 jni_ExceptionClear,
3499 jni_FatalError,
3500
3501 jni_PushLocalFrame,
3502 jni_PopLocalFrame,
3503
3504 jni_NewGlobalRef,
3505 jni_DeleteGlobalRef,
3506 jni_DeleteLocalRef,
3507 jni_IsSameObject,
3508
3509 jni_NewLocalRef,
3510 jni_EnsureLocalCapacity,
3511
3512 jni_AllocObject,
3513 jni_NewObject,
3514 jni_NewObjectV,
3515 jni_NewObjectA,
3516
3517 jni_GetObjectClass,
3518 jni_IsInstanceOf,
3519
3520 jni_GetMethodID,
3521
3522 jni_CallObjectMethod,
3523 jni_CallObjectMethodV,
3524 jni_CallObjectMethodA,
3525 jni_CallBooleanMethod,
3526 jni_CallBooleanMethodV,
3527 jni_CallBooleanMethodA,
3528 jni_CallByteMethod,
3529 jni_CallByteMethodV,
3530 jni_CallByteMethodA,
3531 jni_CallCharMethod,
3532 jni_CallCharMethodV,
3533 jni_CallCharMethodA,
3534 jni_CallShortMethod,
3535 jni_CallShortMethodV,
3536 jni_CallShortMethodA,
3537 jni_CallIntMethod,
3538 jni_CallIntMethodV,
3539 jni_CallIntMethodA,
3540 jni_CallLongMethod,
3541 jni_CallLongMethodV,
3542 jni_CallLongMethodA,
3543 jni_CallFloatMethod,
3544 jni_CallFloatMethodV,
3545 jni_CallFloatMethodA,
3546 jni_CallDoubleMethod,
3547 jni_CallDoubleMethodV,
3548 jni_CallDoubleMethodA,
3549 jni_CallVoidMethod,
3550 jni_CallVoidMethodV,
3551 jni_CallVoidMethodA,
3552
3553 jni_CallNonvirtualObjectMethod,
3554 jni_CallNonvirtualObjectMethodV,
3555 jni_CallNonvirtualObjectMethodA,
3556 jni_CallNonvirtualBooleanMethod,
3557 jni_CallNonvirtualBooleanMethodV,
3558 jni_CallNonvirtualBooleanMethodA,
3559 jni_CallNonvirtualByteMethod,
3560 jni_CallNonvirtualByteMethodV,
3561 jni_CallNonvirtualByteMethodA,
3562 jni_CallNonvirtualCharMethod,
3563 jni_CallNonvirtualCharMethodV,
3564 jni_CallNonvirtualCharMethodA,
3565 jni_CallNonvirtualShortMethod,
3566 jni_CallNonvirtualShortMethodV,
3567 jni_CallNonvirtualShortMethodA,
3568 jni_CallNonvirtualIntMethod,
3569 jni_CallNonvirtualIntMethodV,
3570 jni_CallNonvirtualIntMethodA,
3571 jni_CallNonvirtualLongMethod,
3572 jni_CallNonvirtualLongMethodV,
3573 jni_CallNonvirtualLongMethodA,
3574 jni_CallNonvirtualFloatMethod,
3575 jni_CallNonvirtualFloatMethodV,
3576 jni_CallNonvirtualFloatMethodA,
3577 jni_CallNonvirtualDoubleMethod,
3578 jni_CallNonvirtualDoubleMethodV,
3579 jni_CallNonvirtualDoubleMethodA,
3580 jni_CallNonvirtualVoidMethod,
3581 jni_CallNonvirtualVoidMethodV,
3582 jni_CallNonvirtualVoidMethodA,
3583
3584 jni_GetFieldID,
3585
3586 jni_GetObjectField,
3587 jni_GetBooleanField,
3588 jni_GetByteField,
3589 jni_GetCharField,
3590 jni_GetShortField,
3591 jni_GetIntField,
3592 jni_GetLongField,
3593 jni_GetFloatField,
3594 jni_GetDoubleField,
3595
3596 jni_SetObjectField,
3597 jni_SetBooleanField,
3598 jni_SetByteField,
3599 jni_SetCharField,
3600 jni_SetShortField,
3601 jni_SetIntField,
3602 jni_SetLongField,
3603 jni_SetFloatField,
3604 jni_SetDoubleField,
3605
3606 jni_GetStaticMethodID,
3607
3608 jni_CallStaticObjectMethod,
3609 jni_CallStaticObjectMethodV,
3610 jni_CallStaticObjectMethodA,
3611 jni_CallStaticBooleanMethod,
3612 jni_CallStaticBooleanMethodV,
3613 jni_CallStaticBooleanMethodA,
3614 jni_CallStaticByteMethod,
3615 jni_CallStaticByteMethodV,
3616 jni_CallStaticByteMethodA,
3617 jni_CallStaticCharMethod,
3618 jni_CallStaticCharMethodV,
3619 jni_CallStaticCharMethodA,
3620 jni_CallStaticShortMethod,
3621 jni_CallStaticShortMethodV,
3622 jni_CallStaticShortMethodA,
3623 jni_CallStaticIntMethod,
3624 jni_CallStaticIntMethodV,
3625 jni_CallStaticIntMethodA,
3626 jni_CallStaticLongMethod,
3627 jni_CallStaticLongMethodV,
3628 jni_CallStaticLongMethodA,
3629 jni_CallStaticFloatMethod,
3630 jni_CallStaticFloatMethodV,
3631 jni_CallStaticFloatMethodA,
3632 jni_CallStaticDoubleMethod,
3633 jni_CallStaticDoubleMethodV,
3634 jni_CallStaticDoubleMethodA,
3635 jni_CallStaticVoidMethod,
3636 jni_CallStaticVoidMethodV,
3637 jni_CallStaticVoidMethodA,
3638
3639 jni_GetStaticFieldID,
3640
3641 jni_GetStaticObjectField,
3642 jni_GetStaticBooleanField,
3643 jni_GetStaticByteField,
3644 jni_GetStaticCharField,
3645 jni_GetStaticShortField,
3646 jni_GetStaticIntField,
3647 jni_GetStaticLongField,
3648 jni_GetStaticFloatField,
3649 jni_GetStaticDoubleField,
3650
3651 jni_SetStaticObjectField,
3652 jni_SetStaticBooleanField,
3653 jni_SetStaticByteField,
3654 jni_SetStaticCharField,
3655 jni_SetStaticShortField,
3656 jni_SetStaticIntField,
3657 jni_SetStaticLongField,
3658 jni_SetStaticFloatField,
3659 jni_SetStaticDoubleField,
3660
3661 jni_NewString,
3662 jni_GetStringLength,
3663 jni_GetStringChars,
3664 jni_ReleaseStringChars,
3665
3666 jni_NewStringUTF,
3667 jni_GetStringUTFLength,
3668 jni_GetStringUTFChars,
3669 jni_ReleaseStringUTFChars,
3670
3671 jni_GetArrayLength,
3672
3673 jni_NewObjectArray,
3674 jni_GetObjectArrayElement,
3675 jni_SetObjectArrayElement,
3676
3677 jni_NewBooleanArray,
3678 jni_NewByteArray,
3679 jni_NewCharArray,
3680 jni_NewShortArray,
3681 jni_NewIntArray,
3682 jni_NewLongArray,
3683 jni_NewFloatArray,
3684 jni_NewDoubleArray,
3685
3686 jni_GetBooleanArrayElements,
3687 jni_GetByteArrayElements,
3688 jni_GetCharArrayElements,
3689 jni_GetShortArrayElements,
3690 jni_GetIntArrayElements,
3691 jni_GetLongArrayElements,
3692 jni_GetFloatArrayElements,
3693 jni_GetDoubleArrayElements,
3694
3695 jni_ReleaseBooleanArrayElements,
3696 jni_ReleaseByteArrayElements,
3697 jni_ReleaseCharArrayElements,
3698 jni_ReleaseShortArrayElements,
3699 jni_ReleaseIntArrayElements,
3700 jni_ReleaseLongArrayElements,
3701 jni_ReleaseFloatArrayElements,
3702 jni_ReleaseDoubleArrayElements,
3703
3704 jni_GetBooleanArrayRegion,
3705 jni_GetByteArrayRegion,
3706 jni_GetCharArrayRegion,
3707 jni_GetShortArrayRegion,
3708 jni_GetIntArrayRegion,
3709 jni_GetLongArrayRegion,
3710 jni_GetFloatArrayRegion,
3711 jni_GetDoubleArrayRegion,
3712
3713 jni_SetBooleanArrayRegion,
3714 jni_SetByteArrayRegion,
3715 jni_SetCharArrayRegion,
3716 jni_SetShortArrayRegion,
3717 jni_SetIntArrayRegion,
3718 jni_SetLongArrayRegion,
3719 jni_SetFloatArrayRegion,
3720 jni_SetDoubleArrayRegion,
3721
3722 jni_RegisterNatives,
3723 jni_UnregisterNatives,
3724
3725 jni_MonitorEnter,
3726 jni_MonitorExit,
3727
3728 jni_GetJavaVM,
3729
3730 jni_GetStringRegion,
3731 jni_GetStringUTFRegion,
3732
3733 jni_GetPrimitiveArrayCritical,
3734 jni_ReleasePrimitiveArrayCritical,
3735
3736 jni_GetStringCritical,
3737 jni_ReleaseStringCritical,
3738
3739 jni_NewWeakGlobalRef,
3740 jni_DeleteWeakGlobalRef,
3741
3742 jni_ExceptionCheck,
3743
3744 jni_NewDirectByteBuffer,
3745 jni_GetDirectBufferAddress,
3746 jni_GetDirectBufferCapacity,
3747
3748 // New 1_6 features
3749
3750 jni_GetObjectRefType,
3751
3752 // Module features
3753
3754 jni_GetModule
3755 };
3756
3757
3758 // For jvmti use to modify jni function table.
3759 // Java threads in native contiues to run until it is transitioned
3760 // to VM at safepoint. Before the transition or before it is blocked
3761 // for safepoint it may access jni function table. VM could crash if
3762 // any java thread access the jni function table in the middle of memcpy.
3763 // To avoid this each function pointers are copied automically.
3764 void copy_jni_function_table(const struct JNINativeInterface_ *new_jni_NativeInterface) {
3765 assert(SafepointSynchronize::is_at_safepoint(), "must be at safepoint");
3766 intptr_t *a = (intptr_t *) jni_functions();
3767 intptr_t *b = (intptr_t *) new_jni_NativeInterface;
3768 for (uint i=0; i < sizeof(struct JNINativeInterface_)/sizeof(void *); i++) {
3769 Atomic::store(*b++, a++);
3770 }
3771 }
3772
3773 void quicken_jni_functions() {
3774 // Replace Get<Primitive>Field with fast versions
3775 if (UseFastJNIAccessors && !JvmtiExport::can_post_field_access()
3776 && !VerifyJNIFields && !CountJNICalls && !CheckJNICalls) {
3777 address func;
3778 func = JNI_FastGetField::generate_fast_get_boolean_field();
3779 if (func != (address)-1) {
3780 jni_NativeInterface.GetBooleanField = (GetBooleanField_t)func;
3781 }
3782 func = JNI_FastGetField::generate_fast_get_byte_field();
3783 if (func != (address)-1) {
3784 jni_NativeInterface.GetByteField = (GetByteField_t)func;
3785 }
3786 func = JNI_FastGetField::generate_fast_get_char_field();
3787 if (func != (address)-1) {
3788 jni_NativeInterface.GetCharField = (GetCharField_t)func;
3789 }
3790 func = JNI_FastGetField::generate_fast_get_short_field();
3791 if (func != (address)-1) {
3792 jni_NativeInterface.GetShortField = (GetShortField_t)func;
3793 }
3794 func = JNI_FastGetField::generate_fast_get_int_field();
3795 if (func != (address)-1) {
3796 jni_NativeInterface.GetIntField = (GetIntField_t)func;
3797 }
3798 func = JNI_FastGetField::generate_fast_get_long_field();
3799 if (func != (address)-1) {
3800 jni_NativeInterface.GetLongField = (GetLongField_t)func;
3801 }
3802 func = JNI_FastGetField::generate_fast_get_float_field();
3803 if (func != (address)-1) {
3804 jni_NativeInterface.GetFloatField = (GetFloatField_t)func;
3805 }
3806 func = JNI_FastGetField::generate_fast_get_double_field();
3807 if (func != (address)-1) {
3808 jni_NativeInterface.GetDoubleField = (GetDoubleField_t)func;
3809 }
3810 }
3811 }
3812
3813 // Returns the function structure
3814 struct JNINativeInterface_* jni_functions() {
3815 #if INCLUDE_JNI_CHECK
3816 if (CheckJNICalls) return jni_functions_check();
3817 #endif // INCLUDE_JNI_CHECK
3818 return &jni_NativeInterface;
3819 }
3820
3821 // Returns the function structure
3822 struct JNINativeInterface_* jni_functions_nocheck() {
3823 return &jni_NativeInterface;
3824 }
3825
3826 static void post_thread_start_event(const JavaThread* jt) {
3827 assert(jt != NULL, "invariant");
3828 EventThreadStart event;
3829 if (event.should_commit()) {
3830 event.set_thread(JFR_THREAD_ID(jt));
3831 event.commit();
3832 }
3833 }
3834
3835 // Invocation API
3836
3837
3838 // Forward declaration
3839 extern const struct JNIInvokeInterface_ jni_InvokeInterface;
3840
3841 // Global invocation API vars
3842 volatile int vm_created = 0;
3843 // Indicate whether it is safe to recreate VM
3844 volatile int safe_to_recreate_vm = 1;
3845 struct JavaVM_ main_vm = {&jni_InvokeInterface};
3846
3847
3848 #define JAVASTACKSIZE (400 * 1024) /* Default size of a thread java stack */
3849 enum { VERIFY_NONE, VERIFY_REMOTE, VERIFY_ALL };
3850
3851 DT_RETURN_MARK_DECL(GetDefaultJavaVMInitArgs, jint
3852 , HOTSPOT_JNI_GETDEFAULTJAVAVMINITARGS_RETURN(_ret_ref));
3853
3854 _JNI_IMPORT_OR_EXPORT_ jint JNICALL JNI_GetDefaultJavaVMInitArgs(void *args_) {
3855 HOTSPOT_JNI_GETDEFAULTJAVAVMINITARGS_ENTRY(args_);
3856 JDK1_1InitArgs *args = (JDK1_1InitArgs *)args_;
3857 jint ret = JNI_ERR;
3858 DT_RETURN_MARK(GetDefaultJavaVMInitArgs, jint, (const jint&)ret);
3859
3860 if (Threads::is_supported_jni_version(args->version)) {
3861 ret = JNI_OK;
3862 }
3863 // 1.1 style no longer supported in hotspot.
3864 // According the JNI spec, we should update args->version on return.
3865 // We also use the structure to communicate with launcher about default
3866 // stack size.
3867 if (args->version == JNI_VERSION_1_1) {
3868 args->version = JNI_VERSION_1_2;
3869 // javaStackSize is int in arguments structure
3870 assert(jlong(ThreadStackSize) * K < INT_MAX, "integer overflow");
3871 args->javaStackSize = (jint)(ThreadStackSize * K);
3872 }
3873 return ret;
3874 }
3875
3876 DT_RETURN_MARK_DECL(CreateJavaVM, jint
3877 , HOTSPOT_JNI_CREATEJAVAVM_RETURN(_ret_ref));
3878
3879 static jint JNI_CreateJavaVM_inner(JavaVM **vm, void **penv, void *args) {
3880 HOTSPOT_JNI_CREATEJAVAVM_ENTRY((void **) vm, penv, args);
3881
3882 jint result = JNI_ERR;
3883 DT_RETURN_MARK(CreateJavaVM, jint, (const jint&)result);
3884
3885 // We're about to use Atomic::xchg for synchronization. Some Zero
3886 // platforms use the GCC builtin __sync_lock_test_and_set for this,
3887 // but __sync_lock_test_and_set is not guaranteed to do what we want
3888 // on all architectures. So we check it works before relying on it.
3889 #if defined(ZERO) && defined(ASSERT)
3890 {
3891 jint a = 0xcafebabe;
3892 jint b = Atomic::xchg((jint) 0xdeadbeef, &a);
3893 void *c = &a;
3894 void *d = Atomic::xchg(&b, &c);
3895 assert(a == (jint) 0xdeadbeef && b == (jint) 0xcafebabe, "Atomic::xchg() works");
3896 assert(c == &b && d == &a, "Atomic::xchg() works");
3897 }
3898 #endif // ZERO && ASSERT
3899
3900 // At the moment it's only possible to have one Java VM,
3901 // since some of the runtime state is in global variables.
3902
3903 // We cannot use our mutex locks here, since they only work on
3904 // Threads. We do an atomic compare and exchange to ensure only
3905 // one thread can call this method at a time
3906
3907 // We use Atomic::xchg rather than Atomic::add/dec since on some platforms
3908 // the add/dec implementations are dependent on whether we are running
3909 // on a multiprocessor Atomic::xchg does not have this problem.
3910 if (Atomic::xchg(1, &vm_created) == 1) {
3911 return JNI_EEXIST; // already created, or create attempt in progress
3912 }
3913 if (Atomic::xchg(0, &safe_to_recreate_vm) == 0) {
3914 return JNI_ERR; // someone tried and failed and retry not allowed.
3915 }
3916
3917 assert(vm_created == 1, "vm_created is true during the creation");
3918
3919 /**
3920 * Certain errors during initialization are recoverable and do not
3921 * prevent this method from being called again at a later time
3922 * (perhaps with different arguments). However, at a certain
3923 * point during initialization if an error occurs we cannot allow
3924 * this function to be called again (or it will crash). In those
3925 * situations, the 'canTryAgain' flag is set to false, which atomically
3926 * sets safe_to_recreate_vm to 1, such that any new call to
3927 * JNI_CreateJavaVM will immediately fail using the above logic.
3928 */
3929 bool can_try_again = true;
3930
3931 result = Threads::create_vm((JavaVMInitArgs*) args, &can_try_again);
3932 if (result == JNI_OK) {
3933 JavaThread *thread = JavaThread::current();
3934 assert(!thread->has_pending_exception(), "should have returned not OK");
3935 /* thread is thread_in_vm here */
3936 *vm = (JavaVM *)(&main_vm);
3937 *(JNIEnv**)penv = thread->jni_environment();
3938
3939 #if INCLUDE_JVMCI
3940 if (EnableJVMCI) {
3941 if (UseJVMCICompiler) {
3942 // JVMCI is initialized on a CompilerThread
3943 if (BootstrapJVMCI) {
3944 JavaThread* THREAD = thread;
3945 JVMCICompiler* compiler = JVMCICompiler::instance(true, CATCH);
3946 compiler->bootstrap(THREAD);
3947 if (HAS_PENDING_EXCEPTION) {
3948 HandleMark hm;
3949 vm_exit_during_initialization(Handle(THREAD, PENDING_EXCEPTION));
3950 }
3951 }
3952 }
3953 }
3954 #endif
3955
3956 // Notify JVMTI
3957 if (JvmtiExport::should_post_thread_life()) {
3958 JvmtiExport::post_thread_start(thread);
3959 }
3960
3961 post_thread_start_event(thread);
3962
3963 #ifndef PRODUCT
3964 if (ReplayCompiles) ciReplay::replay(thread);
3965
3966 // Some platforms (like Win*) need a wrapper around these test
3967 // functions in order to properly handle error conditions.
3968 VMError::test_error_handler();
3969 #endif
3970
3971 // Since this is not a JVM_ENTRY we have to set the thread state manually before leaving.
3972 ThreadStateTransition::transition_and_fence(thread, _thread_in_vm, _thread_in_native);
3973 } else {
3974 // If create_vm exits because of a pending exception, exit with that
3975 // exception. In the future when we figure out how to reclaim memory,
3976 // we may be able to exit with JNI_ERR and allow the calling application
3977 // to continue.
3978 if (Universe::is_fully_initialized()) {
3979 // otherwise no pending exception possible - VM will already have aborted
3980 JavaThread* THREAD = JavaThread::current();
3981 if (HAS_PENDING_EXCEPTION) {
3982 HandleMark hm;
3983 vm_exit_during_initialization(Handle(THREAD, PENDING_EXCEPTION));
3984 }
3985 }
3986
3987 if (can_try_again) {
3988 // reset safe_to_recreate_vm to 1 so that retrial would be possible
3989 safe_to_recreate_vm = 1;
3990 }
3991
3992 // Creation failed. We must reset vm_created
3993 *vm = 0;
3994 *(JNIEnv**)penv = 0;
3995 // reset vm_created last to avoid race condition. Use OrderAccess to
3996 // control both compiler and architectural-based reordering.
3997 OrderAccess::release_store(&vm_created, 0);
3998 }
3999
4000 // Flush stdout and stderr before exit.
4001 fflush(stdout);
4002 fflush(stderr);
4003
4004 return result;
4005
4006 }
4007
4008 _JNI_IMPORT_OR_EXPORT_ jint JNICALL JNI_CreateJavaVM(JavaVM **vm, void **penv, void *args) {
4009 jint result = JNI_ERR;
4010 // On Windows, let CreateJavaVM run with SEH protection
4011 #ifdef _WIN32
4012 __try {
4013 #endif
4014 result = JNI_CreateJavaVM_inner(vm, penv, args);
4015 #ifdef _WIN32
4016 } __except(topLevelExceptionFilter((_EXCEPTION_POINTERS*)_exception_info())) {
4017 // Nothing to do.
4018 }
4019 #endif
4020 return result;
4021 }
4022
4023 _JNI_IMPORT_OR_EXPORT_ jint JNICALL JNI_GetCreatedJavaVMs(JavaVM **vm_buf, jsize bufLen, jsize *numVMs) {
4024 // See bug 4367188, the wrapper can sometimes cause VM crashes
4025 // JNIWrapper("GetCreatedJavaVMs");
4026
4027 HOTSPOT_JNI_GETCREATEDJAVAVMS_ENTRY((void **) vm_buf, bufLen, (uintptr_t *) numVMs);
4028
4029 if (vm_created == 1) {
4030 if (numVMs != NULL) *numVMs = 1;
4031 if (bufLen > 0) *vm_buf = (JavaVM *)(&main_vm);
4032 } else {
4033 if (numVMs != NULL) *numVMs = 0;
4034 }
4035 HOTSPOT_JNI_GETCREATEDJAVAVMS_RETURN(JNI_OK);
4036 return JNI_OK;
4037 }
4038
4039 extern "C" {
4040
4041 DT_RETURN_MARK_DECL(DestroyJavaVM, jint
4042 , HOTSPOT_JNI_DESTROYJAVAVM_RETURN(_ret_ref));
4043
4044 static jint JNICALL jni_DestroyJavaVM_inner(JavaVM *vm) {
4045 HOTSPOT_JNI_DESTROYJAVAVM_ENTRY(vm);
4046 jint res = JNI_ERR;
4047 DT_RETURN_MARK(DestroyJavaVM, jint, (const jint&)res);
4048
4049 if (vm_created == 0) {
4050 res = JNI_ERR;
4051 return res;
4052 }
4053
4054 JNIWrapper("DestroyJavaVM");
4055 JNIEnv *env;
4056 JavaVMAttachArgs destroyargs;
4057 destroyargs.version = CurrentVersion;
4058 destroyargs.name = (char *)"DestroyJavaVM";
4059 destroyargs.group = NULL;
4060 res = vm->AttachCurrentThread((void **)&env, (void *)&destroyargs);
4061 if (res != JNI_OK) {
4062 return res;
4063 }
4064
4065 // Since this is not a JVM_ENTRY we have to set the thread state manually before entering.
4066 JavaThread* thread = JavaThread::current();
4067 ThreadStateTransition::transition_from_native(thread, _thread_in_vm);
4068 if (Threads::destroy_vm()) {
4069 // Should not change thread state, VM is gone
4070 vm_created = 0;
4071 res = JNI_OK;
4072 return res;
4073 } else {
4074 ThreadStateTransition::transition_and_fence(thread, _thread_in_vm, _thread_in_native);
4075 res = JNI_ERR;
4076 return res;
4077 }
4078 }
4079
4080 jint JNICALL jni_DestroyJavaVM(JavaVM *vm) {
4081 jint result = JNI_ERR;
4082 // On Windows, we need SEH protection
4083 #ifdef _WIN32
4084 __try {
4085 #endif
4086 result = jni_DestroyJavaVM_inner(vm);
4087 #ifdef _WIN32
4088 } __except(topLevelExceptionFilter((_EXCEPTION_POINTERS*)_exception_info())) {
4089 // Nothing to do.
4090 }
4091 #endif
4092 return result;
4093 }
4094
4095 static jint attach_current_thread(JavaVM *vm, void **penv, void *_args, bool daemon) {
4096 JavaVMAttachArgs *args = (JavaVMAttachArgs *) _args;
4097
4098 // Check below commented out from JDK1.2fcs as well
4099 /*
4100 if (args && (args->version != JNI_VERSION_1_1 || args->version != JNI_VERSION_1_2)) {
4101 return JNI_EVERSION;
4102 }
4103 */
4104
4105 Thread* t = Thread::current_or_null();
4106 if (t != NULL) {
4107 // If the thread has been attached this operation is a no-op
4108 *(JNIEnv**)penv = ((JavaThread*) t)->jni_environment();
4109 return JNI_OK;
4110 }
4111
4112 // Create a thread and mark it as attaching so it will be skipped by the
4113 // ThreadsListEnumerator - see CR 6404306
4114 JavaThread* thread = new JavaThread(true);
4115
4116 // Set correct safepoint info. The thread is going to call into Java when
4117 // initializing the Java level thread object. Hence, the correct state must
4118 // be set in order for the Safepoint code to deal with it correctly.
4119 thread->set_thread_state(_thread_in_vm);
4120 thread->record_stack_base_and_size();
4121 thread->register_thread_stack_with_NMT();
4122 thread->initialize_thread_current();
4123
4124 if (!os::create_attached_thread(thread)) {
4125 thread->smr_delete();
4126 return JNI_ERR;
4127 }
4128 // Enable stack overflow checks
4129 thread->create_stack_guard_pages();
4130
4131 thread->initialize_tlab();
4132
4133 thread->cache_global_variables();
4134
4135 // Crucial that we do not have a safepoint check for this thread, since it has
4136 // not been added to the Thread list yet.
4137 { Threads_lock->lock_without_safepoint_check();
4138 // This must be inside this lock in order to get FullGCALot to work properly, i.e., to
4139 // avoid this thread trying to do a GC before it is added to the thread-list
4140 thread->set_active_handles(JNIHandleBlock::allocate_block());
4141 Threads::add(thread, daemon);
4142 Threads_lock->unlock();
4143 }
4144 // Create thread group and name info from attach arguments
4145 oop group = NULL;
4146 char* thread_name = NULL;
4147 if (args != NULL && Threads::is_supported_jni_version(args->version)) {
4148 group = JNIHandles::resolve(args->group);
4149 thread_name = args->name; // may be NULL
4150 }
4151 if (group == NULL) group = Universe::main_thread_group();
4152
4153 // Create Java level thread object and attach it to this thread
4154 bool attach_failed = false;
4155 {
4156 EXCEPTION_MARK;
4157 HandleMark hm(THREAD);
4158 Handle thread_group(THREAD, group);
4159 thread->allocate_threadObj(thread_group, thread_name, daemon, THREAD);
4160 if (HAS_PENDING_EXCEPTION) {
4161 CLEAR_PENDING_EXCEPTION;
4162 // cleanup outside the handle mark.
4163 attach_failed = true;
4164 }
4165 }
4166
4167 if (attach_failed) {
4168 // Added missing cleanup
4169 thread->cleanup_failed_attach_current_thread();
4170 return JNI_ERR;
4171 }
4172
4173 // mark the thread as no longer attaching
4174 // this uses a fence to push the change through so we don't have
4175 // to regrab the threads_lock
4176 thread->set_done_attaching_via_jni();
4177
4178 // Set java thread status.
4179 java_lang_Thread::set_thread_status(thread->threadObj(),
4180 java_lang_Thread::RUNNABLE);
4181
4182 // Notify the debugger
4183 if (JvmtiExport::should_post_thread_life()) {
4184 JvmtiExport::post_thread_start(thread);
4185 }
4186
4187 post_thread_start_event(thread);
4188
4189 *(JNIEnv**)penv = thread->jni_environment();
4190
4191 // Now leaving the VM, so change thread_state. This is normally automatically taken care
4192 // of in the JVM_ENTRY. But in this situation we have to do it manually. Notice, that by
4193 // using ThreadStateTransition::transition, we do a callback to the safepoint code if
4194 // needed.
4195
4196 ThreadStateTransition::transition_and_fence(thread, _thread_in_vm, _thread_in_native);
4197
4198 // Perform any platform dependent FPU setup
4199 os::setup_fpu();
4200
4201 return JNI_OK;
4202 }
4203
4204
4205 jint JNICALL jni_AttachCurrentThread(JavaVM *vm, void **penv, void *_args) {
4206 HOTSPOT_JNI_ATTACHCURRENTTHREAD_ENTRY(vm, penv, _args);
4207 if (vm_created == 0) {
4208 HOTSPOT_JNI_ATTACHCURRENTTHREAD_RETURN((uint32_t) JNI_ERR);
4209 return JNI_ERR;
4210 }
4211
4212 JNIWrapper("AttachCurrentThread");
4213 jint ret = attach_current_thread(vm, penv, _args, false);
4214 HOTSPOT_JNI_ATTACHCURRENTTHREAD_RETURN(ret);
4215 return ret;
4216 }
4217
4218
4219 jint JNICALL jni_DetachCurrentThread(JavaVM *vm) {
4220 HOTSPOT_JNI_DETACHCURRENTTHREAD_ENTRY(vm);
4221
4222 JNIWrapper("DetachCurrentThread");
4223
4224 // If the thread has already been detached the operation is a no-op
4225 if (Thread::current_or_null() == NULL) {
4226 HOTSPOT_JNI_DETACHCURRENTTHREAD_RETURN(JNI_OK);
4227 return JNI_OK;
4228 }
4229
4230 VM_Exit::block_if_vm_exited();
4231
4232 JavaThread* thread = JavaThread::current();
4233 if (thread->has_last_Java_frame()) {
4234 HOTSPOT_JNI_DETACHCURRENTTHREAD_RETURN((uint32_t) JNI_ERR);
4235 // Can't detach a thread that's running java, that can't work.
4236 return JNI_ERR;
4237 }
4238
4239 // Safepoint support. Have to do call-back to safepoint code, if in the
4240 // middle of a safepoint operation
4241 ThreadStateTransition::transition_from_native(thread, _thread_in_vm);
4242
4243 // XXX: Note that JavaThread::exit() call below removes the guards on the
4244 // stack pages set up via enable_stack_{red,yellow}_zone() calls
4245 // above in jni_AttachCurrentThread. Unfortunately, while the setting
4246 // of the guards is visible in jni_AttachCurrentThread above,
4247 // the removal of the guards is buried below in JavaThread::exit()
4248 // here. The abstraction should be more symmetrically either exposed
4249 // or hidden (e.g. it could probably be hidden in the same
4250 // (platform-dependent) methods where we do alternate stack
4251 // maintenance work?)
4252 thread->exit(false, JavaThread::jni_detach);
4253 thread->smr_delete();
4254
4255 HOTSPOT_JNI_DETACHCURRENTTHREAD_RETURN(JNI_OK);
4256 return JNI_OK;
4257 }
4258
4259 DT_RETURN_MARK_DECL(GetEnv, jint
4260 , HOTSPOT_JNI_GETENV_RETURN(_ret_ref));
4261
4262 jint JNICALL jni_GetEnv(JavaVM *vm, void **penv, jint version) {
4263 HOTSPOT_JNI_GETENV_ENTRY(vm, penv, version);
4264 jint ret = JNI_ERR;
4265 DT_RETURN_MARK(GetEnv, jint, (const jint&)ret);
4266
4267 if (vm_created == 0) {
4268 *penv = NULL;
4269 ret = JNI_EDETACHED;
4270 return ret;
4271 }
4272
4273 if (JniExportedInterface::GetExportedInterface(vm, penv, version, &ret)) {
4274 return ret;
4275 }
4276
4277 #ifndef JVMPI_VERSION_1
4278 // need these in order to be polite about older agents
4279 #define JVMPI_VERSION_1 ((jint)0x10000001)
4280 #define JVMPI_VERSION_1_1 ((jint)0x10000002)
4281 #define JVMPI_VERSION_1_2 ((jint)0x10000003)
4282 #endif // !JVMPI_VERSION_1
4283
4284 Thread* thread = Thread::current_or_null();
4285 if (thread != NULL && thread->is_Java_thread()) {
4286 if (Threads::is_supported_jni_version_including_1_1(version)) {
4287 *(JNIEnv**)penv = ((JavaThread*) thread)->jni_environment();
4288 ret = JNI_OK;
4289 return ret;
4290
4291 } else if (version == JVMPI_VERSION_1 ||
4292 version == JVMPI_VERSION_1_1 ||
4293 version == JVMPI_VERSION_1_2) {
4294 tty->print_cr("ERROR: JVMPI, an experimental interface, is no longer supported.");
4295 tty->print_cr("Please use the supported interface: the JVM Tool Interface (JVM TI).");
4296 ret = JNI_EVERSION;
4297 return ret;
4298 } else if (JvmtiExport::is_jvmdi_version(version)) {
4299 tty->print_cr("FATAL ERROR: JVMDI is no longer supported.");
4300 tty->print_cr("Please use the supported interface: the JVM Tool Interface (JVM TI).");
4301 ret = JNI_EVERSION;
4302 return ret;
4303 } else {
4304 *penv = NULL;
4305 ret = JNI_EVERSION;
4306 return ret;
4307 }
4308 } else {
4309 *penv = NULL;
4310 ret = JNI_EDETACHED;
4311 return ret;
4312 }
4313 }
4314
4315
4316 jint JNICALL jni_AttachCurrentThreadAsDaemon(JavaVM *vm, void **penv, void *_args) {
4317 HOTSPOT_JNI_ATTACHCURRENTTHREADASDAEMON_ENTRY(vm, penv, _args);
4318 if (vm_created == 0) {
4319 HOTSPOT_JNI_ATTACHCURRENTTHREADASDAEMON_RETURN((uint32_t) JNI_ERR);
4320 return JNI_ERR;
4321 }
4322
4323 JNIWrapper("AttachCurrentThreadAsDaemon");
4324 jint ret = attach_current_thread(vm, penv, _args, true);
4325 HOTSPOT_JNI_ATTACHCURRENTTHREADASDAEMON_RETURN(ret);
4326 return ret;
4327 }
4328
4329
4330 } // End extern "C"
4331
4332 const struct JNIInvokeInterface_ jni_InvokeInterface = {
4333 NULL,
4334 NULL,
4335 NULL,
4336
4337 jni_DestroyJavaVM,
4338 jni_AttachCurrentThread,
4339 jni_DetachCurrentThread,
4340 jni_GetEnv,
4341 jni_AttachCurrentThreadAsDaemon
4342 };