1 /*
2 * Copyright (c) 1997, 2019, Oracle and/or its affiliates. All rights reserved.
3 * Copyright (c) 2012 Red Hat, Inc.
4 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
5 *
6 * This code is free software; you can redistribute it and/or modify it
7 * under the terms of the GNU General Public License version 2 only, as
8 * published by the Free Software Foundation.
9 *
10 * This code is distributed in the hope that it will be useful, but WITHOUT
11 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
12 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
13 * version 2 for more details (a copy is included in the LICENSE file that
14 * accompanied this code).
15 *
16 * You should have received a copy of the GNU General Public License version
17 * 2 along with this work; if not, write to the Free Software Foundation,
18 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
19 *
20 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
21 * or visit www.oracle.com if you need additional information or have any
22 * questions.
23 *
24 */
25
26 #include "precompiled.hpp"
27 #include "jni.h"
28 #include "jvm.h"
29 #include "ci/ciReplay.hpp"
30 #include "classfile/altHashing.hpp"
31 #include "classfile/classFileStream.hpp"
32 #include "classfile/classLoader.hpp"
33 #include "classfile/javaClasses.hpp"
34 #include "classfile/javaClasses.inline.hpp"
35 #include "classfile/modules.hpp"
36 #include "classfile/symbolTable.hpp"
37 #include "classfile/systemDictionary.hpp"
38 #include "classfile/vmSymbols.hpp"
39 #include "gc/shared/gcLocker.inline.hpp"
40 #include "interpreter/linkResolver.hpp"
41 #include "jfr/jfrEvents.hpp"
42 #include "jfr/support/jfrThreadId.hpp"
43 #include "logging/log.hpp"
44 #include "memory/allocation.hpp"
45 #include "memory/allocation.inline.hpp"
46 #include "memory/oopFactory.hpp"
47 #include "memory/resourceArea.hpp"
48 #include "memory/universe.hpp"
49 #include "oops/access.inline.hpp"
50 #include "oops/arrayOop.inline.hpp"
51 #include "oops/instanceKlass.hpp"
52 #include "oops/instanceOop.hpp"
53 #include "oops/markWord.hpp"
54 #include "oops/method.hpp"
55 #include "oops/objArrayKlass.hpp"
56 #include "oops/objArrayOop.inline.hpp"
57 #include "oops/oop.inline.hpp"
58 #include "oops/symbol.hpp"
59 #include "oops/typeArrayKlass.hpp"
60 #include "oops/typeArrayOop.inline.hpp"
61 #include "oops/valueArrayOop.inline.hpp"
62 #include "oops/valueKlass.inline.hpp"
63 #include "prims/jniCheck.hpp"
64 #include "prims/jniExport.hpp"
65 #include "prims/jniFastGetField.hpp"
66 #include "prims/jvm_misc.hpp"
67 #include "prims/jvmtiExport.hpp"
68 #include "prims/jvmtiThreadState.hpp"
69 #include "runtime/atomic.hpp"
70 #include "runtime/compilationPolicy.hpp"
71 #include "runtime/fieldDescriptor.inline.hpp"
72 #include "runtime/handles.inline.hpp"
73 #include "runtime/interfaceSupport.inline.hpp"
74 #include "runtime/java.hpp"
75 #include "runtime/javaCalls.hpp"
76 #include "runtime/jfieldIDWorkaround.hpp"
77 #include "runtime/jniHandles.inline.hpp"
78 #include "runtime/orderAccess.hpp"
79 #include "runtime/reflection.hpp"
80 #include "runtime/safepointVerifiers.hpp"
81 #include "runtime/sharedRuntime.hpp"
82 #include "runtime/signature.hpp"
83 #include "runtime/thread.inline.hpp"
84 #include "runtime/vmOperations.hpp"
85 #include "services/memTracker.hpp"
86 #include "services/runtimeService.hpp"
87 #include "utilities/defaultStream.hpp"
88 #include "utilities/dtrace.hpp"
89 #include "utilities/events.hpp"
90 #include "utilities/histogram.hpp"
91 #include "utilities/macros.hpp"
92 #include "utilities/vmError.hpp"
93
94 static jint CurrentVersion = JNI_VERSION_10;
95
96 #ifdef _WIN32
97 extern LONG WINAPI topLevelExceptionFilter(_EXCEPTION_POINTERS* );
98 #endif
99
100 // The DT_RETURN_MARK macros create a scoped object to fire the dtrace
101 // '-return' probe regardless of the return path is taken out of the function.
102 // Methods that have multiple return paths use this to avoid having to
103 // instrument each return path. Methods that use CHECK or THROW must use this
104 // since those macros can cause an immedate uninstrumented return.
105 //
106 // In order to get the return value, a reference to the variable containing
107 // the return value must be passed to the contructor of the object, and
108 // the return value must be set before return (since the mark object has
109 // a reference to it).
110 //
111 // Example:
112 // DT_RETURN_MARK_DECL(SomeFunc, int);
113 // JNI_ENTRY(int, SomeFunc, ...)
114 // int return_value = 0;
115 // DT_RETURN_MARK(SomeFunc, int, (const int&)return_value);
116 // foo(CHECK_0)
117 // return_value = 5;
118 // return return_value;
119 // JNI_END
120 #define DT_RETURN_MARK_DECL(name, type, probe) \
121 DTRACE_ONLY( \
122 class DTraceReturnProbeMark_##name { \
123 public: \
124 const type& _ret_ref; \
125 DTraceReturnProbeMark_##name(const type& v) : _ret_ref(v) {} \
126 ~DTraceReturnProbeMark_##name() { \
127 probe; \
128 } \
129 } \
130 )
131 // Void functions are simpler since there's no return value
132 #define DT_VOID_RETURN_MARK_DECL(name, probe) \
133 DTRACE_ONLY( \
134 class DTraceReturnProbeMark_##name { \
135 public: \
136 ~DTraceReturnProbeMark_##name() { \
137 probe; \
138 } \
139 } \
140 )
141
142 // Place these macros in the function to mark the return. Non-void
143 // functions need the type and address of the return value.
144 #define DT_RETURN_MARK(name, type, ref) \
145 DTRACE_ONLY( DTraceReturnProbeMark_##name dtrace_return_mark(ref) )
146 #define DT_VOID_RETURN_MARK(name) \
147 DTRACE_ONLY( DTraceReturnProbeMark_##name dtrace_return_mark )
148
149
150 // Use these to select distinct code for floating-point vs. non-floating point
151 // situations. Used from within common macros where we need slightly
152 // different behavior for Float/Double
153 #define FP_SELECT_Boolean(intcode, fpcode) intcode
154 #define FP_SELECT_Byte(intcode, fpcode) intcode
155 #define FP_SELECT_Char(intcode, fpcode) intcode
156 #define FP_SELECT_Short(intcode, fpcode) intcode
157 #define FP_SELECT_Object(intcode, fpcode) intcode
158 #define FP_SELECT_Int(intcode, fpcode) intcode
159 #define FP_SELECT_Long(intcode, fpcode) intcode
160 #define FP_SELECT_Float(intcode, fpcode) fpcode
161 #define FP_SELECT_Double(intcode, fpcode) fpcode
162 #define FP_SELECT(TypeName, intcode, fpcode) \
163 FP_SELECT_##TypeName(intcode, fpcode)
164
165 // Choose DT_RETURN_MARK macros based on the type: float/double -> void
166 // (dtrace doesn't do FP yet)
167 #define DT_RETURN_MARK_DECL_FOR(TypeName, name, type, probe) \
168 FP_SELECT(TypeName, \
169 DT_RETURN_MARK_DECL(name, type, probe), DT_VOID_RETURN_MARK_DECL(name, probe) )
170 #define DT_RETURN_MARK_FOR(TypeName, name, type, ref) \
171 FP_SELECT(TypeName, \
172 DT_RETURN_MARK(name, type, ref), DT_VOID_RETURN_MARK(name) )
173
174
175 // out-of-line helpers for class jfieldIDWorkaround:
176
177 bool jfieldIDWorkaround::is_valid_jfieldID(Klass* k, jfieldID id) {
178 if (jfieldIDWorkaround::is_instance_jfieldID(k, id)) {
179 uintptr_t as_uint = (uintptr_t) id;
180 intptr_t offset = raw_instance_offset(id);
181 if (is_checked_jfieldID(id)) {
182 if (!klass_hash_ok(k, id)) {
183 return false;
184 }
185 }
186 return InstanceKlass::cast(k)->contains_field_offset(offset);
187 } else {
188 JNIid* result = (JNIid*) id;
189 #ifdef ASSERT
190 return result != NULL && result->is_static_field_id();
191 #else
192 return result != NULL;
193 #endif
194 }
195 }
196
197
198 intptr_t jfieldIDWorkaround::encode_klass_hash(Klass* k, intptr_t offset) {
199 if (offset <= small_offset_mask) {
200 Klass* field_klass = k;
201 Klass* super_klass = field_klass->super();
202 // With compressed oops the most super class with nonstatic fields would
203 // be the owner of fields embedded in the header.
204 while (InstanceKlass::cast(super_klass)->has_nonstatic_fields() &&
205 InstanceKlass::cast(super_klass)->contains_field_offset(offset)) {
206 field_klass = super_klass; // super contains the field also
207 super_klass = field_klass->super();
208 }
209 debug_only(NoSafepointVerifier nosafepoint;)
210 uintptr_t klass_hash = field_klass->identity_hash();
211 return ((klass_hash & klass_mask) << klass_shift) | checked_mask_in_place;
212 } else {
213 #if 0
214 #ifndef PRODUCT
215 {
216 ResourceMark rm;
217 warning("VerifyJNIFields: long offset %d in %s", offset, k->external_name());
218 }
219 #endif
220 #endif
221 return 0;
222 }
223 }
224
225 bool jfieldIDWorkaround::klass_hash_ok(Klass* k, jfieldID id) {
226 uintptr_t as_uint = (uintptr_t) id;
227 intptr_t klass_hash = (as_uint >> klass_shift) & klass_mask;
228 do {
229 debug_only(NoSafepointVerifier nosafepoint;)
230 // Could use a non-blocking query for identity_hash here...
231 if ((k->identity_hash() & klass_mask) == klass_hash)
232 return true;
233 k = k->super();
234 } while (k != NULL);
235 return false;
236 }
237
238 void jfieldIDWorkaround::verify_instance_jfieldID(Klass* k, jfieldID id) {
239 guarantee(jfieldIDWorkaround::is_instance_jfieldID(k, id), "must be an instance field" );
240 uintptr_t as_uint = (uintptr_t) id;
241 intptr_t offset = raw_instance_offset(id);
242 if (VerifyJNIFields) {
243 if (is_checked_jfieldID(id)) {
244 guarantee(klass_hash_ok(k, id),
245 "Bug in native code: jfieldID class must match object");
246 } else {
247 #if 0
248 #ifndef PRODUCT
249 if (Verbose) {
250 ResourceMark rm;
251 warning("VerifyJNIFields: unverified offset %d for %s", offset, k->external_name());
252 }
253 #endif
254 #endif
255 }
256 }
257 guarantee(InstanceKlass::cast(k)->contains_field_offset(offset),
258 "Bug in native code: jfieldID offset must address interior of object");
259 }
260
261 // Wrapper to trace JNI functions
262
263 #ifdef ASSERT
264 Histogram* JNIHistogram;
265 static volatile int JNIHistogram_lock = 0;
266
267 class JNIHistogramElement : public HistogramElement {
268 public:
269 JNIHistogramElement(const char* name);
270 };
271
272 JNIHistogramElement::JNIHistogramElement(const char* elementName) {
273 _name = elementName;
274 uintx count = 0;
275
276 while (Atomic::cmpxchg(1, &JNIHistogram_lock, 0) != 0) {
277 while (OrderAccess::load_acquire(&JNIHistogram_lock) != 0) {
278 count +=1;
279 if ( (WarnOnStalledSpinLock > 0)
280 && (count % WarnOnStalledSpinLock == 0)) {
281 warning("JNIHistogram_lock seems to be stalled");
282 }
283 }
284 }
285
286
287 if(JNIHistogram == NULL)
288 JNIHistogram = new Histogram("JNI Call Counts",100);
289
290 JNIHistogram->add_element(this);
291 Atomic::dec(&JNIHistogram_lock);
292 }
293
294 #define JNICountWrapper(arg) \
295 static JNIHistogramElement* e = new JNIHistogramElement(arg); \
296 /* There is a MT-race condition in VC++. So we need to make sure that that e has been initialized */ \
297 if (e != NULL) e->increment_count()
298 #define JNIWrapper(arg) JNICountWrapper(arg);
299 #else
300 #define JNIWrapper(arg)
301 #endif
302
303
304 // Implementation of JNI entries
305
306 DT_RETURN_MARK_DECL(DefineClass, jclass
307 , HOTSPOT_JNI_DEFINECLASS_RETURN(_ret_ref));
308
309 JNI_ENTRY(jclass, jni_DefineClass(JNIEnv *env, const char *name, jobject loaderRef,
310 const jbyte *buf, jsize bufLen))
311 JNIWrapper("DefineClass");
312
313 HOTSPOT_JNI_DEFINECLASS_ENTRY(
314 env, (char*) name, loaderRef, (char*) buf, bufLen);
315
316 jclass cls = NULL;
317 DT_RETURN_MARK(DefineClass, jclass, (const jclass&)cls);
318
319 TempNewSymbol class_name = NULL;
320 // Since exceptions can be thrown, class initialization can take place
321 // if name is NULL no check for class name in .class stream has to be made.
322 if (name != NULL) {
323 const int str_len = (int)strlen(name);
324 if (str_len > Symbol::max_length()) {
325 // It's impossible to create this class; the name cannot fit
326 // into the constant pool.
327 Exceptions::fthrow(THREAD_AND_LOCATION,
328 vmSymbols::java_lang_NoClassDefFoundError(),
329 "Class name exceeds maximum length of %d: %s",
330 Symbol::max_length(),
331 name);
332 return 0;
333 }
334 class_name = SymbolTable::new_symbol(name);
335 }
336 ResourceMark rm(THREAD);
337 ClassFileStream st((u1*)buf, bufLen, NULL, ClassFileStream::verify);
338 Handle class_loader (THREAD, JNIHandles::resolve(loaderRef));
339
340 if (UsePerfData && !class_loader.is_null()) {
341 // check whether the current caller thread holds the lock or not.
342 // If not, increment the corresponding counter
343 if (ObjectSynchronizer::
344 query_lock_ownership((JavaThread*)THREAD, class_loader) !=
345 ObjectSynchronizer::owner_self) {
346 ClassLoader::sync_JNIDefineClassLockFreeCounter()->inc();
347 }
348 }
349 Klass* k = SystemDictionary::resolve_from_stream(class_name,
350 class_loader,
351 Handle(),
352 &st,
353 CHECK_NULL);
354
355 if (log_is_enabled(Debug, class, resolve) && k != NULL) {
356 trace_class_resolution(k);
357 }
358
359 cls = (jclass)JNIHandles::make_local(
360 env, k->java_mirror());
361 return cls;
362 JNI_END
363
364
365
366 DT_RETURN_MARK_DECL(FindClass, jclass
367 , HOTSPOT_JNI_FINDCLASS_RETURN(_ret_ref));
368
369 JNI_ENTRY(jclass, jni_FindClass(JNIEnv *env, const char *name))
370 JNIWrapper("FindClass");
371
372 HOTSPOT_JNI_FINDCLASS_ENTRY(env, (char *)name);
373
374 jclass result = NULL;
375 DT_RETURN_MARK(FindClass, jclass, (const jclass&)result);
376
377 // Sanity check the name: it cannot be null or larger than the maximum size
378 // name we can fit in the constant pool.
379 if (name == NULL) {
380 THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), "No class name given");
381 }
382 if ((int)strlen(name) > Symbol::max_length()) {
383 Exceptions::fthrow(THREAD_AND_LOCATION,
384 vmSymbols::java_lang_NoClassDefFoundError(),
385 "Class name exceeds maximum length of %d: %s",
386 Symbol::max_length(),
387 name);
388 return 0;
389 }
390
391 //%note jni_3
392 Handle protection_domain;
393 // Find calling class
394 Klass* k = thread->security_get_caller_class(0);
395 // default to the system loader when no context
396 Handle loader(THREAD, SystemDictionary::java_system_loader());
397 if (k != NULL) {
398 // Special handling to make sure JNI_OnLoad and JNI_OnUnload are executed
399 // in the correct class context.
400 if (k->class_loader() == NULL &&
401 k->name() == vmSymbols::java_lang_ClassLoader_NativeLibrary()) {
402 JavaValue result(T_OBJECT);
403 JavaCalls::call_static(&result, k,
404 vmSymbols::getFromClass_name(),
405 vmSymbols::void_class_signature(),
406 CHECK_NULL);
407 // When invoked from JNI_OnLoad, NativeLibrary::getFromClass returns
408 // a non-NULL Class object. When invoked from JNI_OnUnload,
409 // it will return NULL to indicate no context.
410 oop mirror = (oop) result.get_jobject();
411 if (mirror != NULL) {
412 Klass* fromClass = java_lang_Class::as_Klass(mirror);
413 loader = Handle(THREAD, fromClass->class_loader());
414 protection_domain = Handle(THREAD, fromClass->protection_domain());
415 }
416 } else {
417 loader = Handle(THREAD, k->class_loader());
418 }
419 }
420
421 TempNewSymbol sym = SymbolTable::new_symbol(name);
422 result = find_class_from_class_loader(env, sym, true, true, loader,
423 protection_domain, true, thread);
424
425 if (log_is_enabled(Debug, class, resolve) && result != NULL) {
426 trace_class_resolution(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(result)));
427 }
428
429 return result;
430 JNI_END
431
432 DT_RETURN_MARK_DECL(FromReflectedMethod, jmethodID
433 , HOTSPOT_JNI_FROMREFLECTEDMETHOD_RETURN((uintptr_t)_ret_ref));
434
435 JNI_ENTRY(jmethodID, jni_FromReflectedMethod(JNIEnv *env, jobject method))
436 JNIWrapper("FromReflectedMethod");
437
438 HOTSPOT_JNI_FROMREFLECTEDMETHOD_ENTRY(env, method);
439
440 jmethodID ret = NULL;
441 DT_RETURN_MARK(FromReflectedMethod, jmethodID, (const jmethodID&)ret);
442
443 // method is a handle to a java.lang.reflect.Method object
444 oop reflected = JNIHandles::resolve_non_null(method);
445 oop mirror = NULL;
446 int slot = 0;
447
448 if (reflected->klass() == SystemDictionary::reflect_Constructor_klass()) {
449 mirror = java_lang_reflect_Constructor::clazz(reflected);
450 slot = java_lang_reflect_Constructor::slot(reflected);
451 } else {
452 assert(reflected->klass() == SystemDictionary::reflect_Method_klass(), "wrong type");
453 mirror = java_lang_reflect_Method::clazz(reflected);
454 slot = java_lang_reflect_Method::slot(reflected);
455 }
456 Klass* k1 = java_lang_Class::as_Klass(mirror);
457
458 // Make sure class is initialized before handing id's out to methods
459 k1->initialize(CHECK_NULL);
460 Method* m = InstanceKlass::cast(k1)->method_with_idnum(slot);
461 ret = m==NULL? NULL : m->jmethod_id(); // return NULL if reflected method deleted
462 return ret;
463 JNI_END
464
465 DT_RETURN_MARK_DECL(FromReflectedField, jfieldID
466 , HOTSPOT_JNI_FROMREFLECTEDFIELD_RETURN((uintptr_t)_ret_ref));
467
468 JNI_ENTRY(jfieldID, jni_FromReflectedField(JNIEnv *env, jobject field))
469 JNIWrapper("FromReflectedField");
470
471 HOTSPOT_JNI_FROMREFLECTEDFIELD_ENTRY(env, field);
472
473 jfieldID ret = NULL;
474 DT_RETURN_MARK(FromReflectedField, jfieldID, (const jfieldID&)ret);
475
476 // field is a handle to a java.lang.reflect.Field object
477 oop reflected = JNIHandles::resolve_non_null(field);
478 oop mirror = java_lang_reflect_Field::clazz(reflected);
479 Klass* k1 = java_lang_Class::as_Klass(mirror);
480 int slot = java_lang_reflect_Field::slot(reflected);
481 int modifiers = java_lang_reflect_Field::modifiers(reflected);
482
483 // Make sure class is initialized before handing id's out to fields
484 k1->initialize(CHECK_NULL);
485
486 // First check if this is a static field
487 if (modifiers & JVM_ACC_STATIC) {
488 intptr_t offset = InstanceKlass::cast(k1)->field_offset( slot );
489 JNIid* id = InstanceKlass::cast(k1)->jni_id_for(offset);
490 assert(id != NULL, "corrupt Field object");
491 debug_only(id->set_is_static_field_id();)
492 // A jfieldID for a static field is a JNIid specifying the field holder and the offset within the Klass*
493 ret = jfieldIDWorkaround::to_static_jfieldID(id);
494 return ret;
495 }
496
497 // The slot is the index of the field description in the field-array
498 // The jfieldID is the offset of the field within the object
499 // It may also have hash bits for k, if VerifyJNIFields is turned on.
500 intptr_t offset = InstanceKlass::cast(k1)->field_offset( slot );
501 bool is_flattened = InstanceKlass::cast(k1)->field_is_flattened(slot);
502 assert(InstanceKlass::cast(k1)->contains_field_offset(offset), "stay within object");
503 ret = jfieldIDWorkaround::to_instance_jfieldID(k1, offset, is_flattened);
504 return ret;
505 JNI_END
506
507
508 DT_RETURN_MARK_DECL(ToReflectedMethod, jobject
509 , HOTSPOT_JNI_TOREFLECTEDMETHOD_RETURN(_ret_ref));
510
511 JNI_ENTRY(jobject, jni_ToReflectedMethod(JNIEnv *env, jclass cls, jmethodID method_id, jboolean isStatic))
512 JNIWrapper("ToReflectedMethod");
513
514 HOTSPOT_JNI_TOREFLECTEDMETHOD_ENTRY(env, cls, (uintptr_t) method_id, isStatic);
515
516 jobject ret = NULL;
517 DT_RETURN_MARK(ToReflectedMethod, jobject, (const jobject&)ret);
518
519 methodHandle m (THREAD, Method::resolve_jmethod_id(method_id));
520 assert(m->is_static() == (isStatic != 0), "jni_ToReflectedMethod access flags doesn't match");
521 oop reflection_method;
522 if (m->is_object_constructor()) {
523 reflection_method = Reflection::new_constructor(m, CHECK_NULL);
524 } else {
525 reflection_method = Reflection::new_method(m, false, CHECK_NULL);
526 }
527 ret = JNIHandles::make_local(env, reflection_method);
528 return ret;
529 JNI_END
530
531 DT_RETURN_MARK_DECL(GetSuperclass, jclass
532 , HOTSPOT_JNI_GETSUPERCLASS_RETURN(_ret_ref));
533
534 JNI_ENTRY(jclass, jni_GetSuperclass(JNIEnv *env, jclass sub))
535 JNIWrapper("GetSuperclass");
536
537 HOTSPOT_JNI_GETSUPERCLASS_ENTRY(env, sub);
538
539 jclass obj = NULL;
540 DT_RETURN_MARK(GetSuperclass, jclass, (const jclass&)obj);
541
542 oop mirror = JNIHandles::resolve_non_null(sub);
543 // primitive classes return NULL
544 if (java_lang_Class::is_primitive(mirror)) return NULL;
545
546 // Rules of Class.getSuperClass as implemented by KLass::java_super:
547 // arrays return Object
548 // interfaces return NULL
549 // proper classes return Klass::super()
550 Klass* k = java_lang_Class::as_Klass(mirror);
551 if (k->is_interface()) return NULL;
552
553 // return mirror for superclass
554 Klass* super = k->java_super();
555 // super2 is the value computed by the compiler's getSuperClass intrinsic:
556 debug_only(Klass* super2 = ( k->is_array_klass()
557 ? SystemDictionary::Object_klass()
558 : k->super() ) );
559 assert(super == super2,
560 "java_super computation depends on interface, array, other super");
561 obj = (super == NULL) ? NULL : (jclass) JNIHandles::make_local(super->java_mirror());
562 return obj;
563 JNI_END
564
565 JNI_ENTRY_NO_PRESERVE(jboolean, jni_IsAssignableFrom(JNIEnv *env, jclass sub, jclass super))
566 JNIWrapper("IsSubclassOf");
567
568 HOTSPOT_JNI_ISASSIGNABLEFROM_ENTRY(env, sub, super);
569
570 oop sub_mirror = JNIHandles::resolve_non_null(sub);
571 oop super_mirror = JNIHandles::resolve_non_null(super);
572 if (java_lang_Class::is_primitive(sub_mirror) ||
573 java_lang_Class::is_primitive(super_mirror)) {
574 jboolean ret = (sub_mirror == super_mirror);
575
576 HOTSPOT_JNI_ISASSIGNABLEFROM_RETURN(ret);
577 return ret;
578 }
579 Klass* sub_klass = java_lang_Class::as_Klass(sub_mirror);
580 Klass* super_klass = java_lang_Class::as_Klass(super_mirror);
581 assert(sub_klass != NULL && super_klass != NULL, "invalid arguments to jni_IsAssignableFrom");
582 jboolean ret = sub_klass->is_subtype_of(super_klass) ?
583 JNI_TRUE : JNI_FALSE;
584 if (sub_klass == super_klass && sub_klass->is_value()) {
585 // for inline class, V <: V?
586 ValueKlass* vk = ValueKlass::cast(InstanceKlass::cast(sub_klass));
587 if (sub_mirror == super_mirror || (sub_mirror == vk->value_mirror() && super_mirror == vk->indirect_mirror())) {
588 ret = JNI_TRUE;
589 } else {
590 ret = JNI_FALSE;
591 }
592 }
593 HOTSPOT_JNI_ISASSIGNABLEFROM_RETURN(ret);
594 return ret;
595 JNI_END
596
597
598 DT_RETURN_MARK_DECL(Throw, jint
599 , HOTSPOT_JNI_THROW_RETURN(_ret_ref));
600
601 JNI_ENTRY(jint, jni_Throw(JNIEnv *env, jthrowable obj))
602 JNIWrapper("Throw");
603
604 HOTSPOT_JNI_THROW_ENTRY(env, obj);
605
606 jint ret = JNI_OK;
607 DT_RETURN_MARK(Throw, jint, (const jint&)ret);
608
609 THROW_OOP_(JNIHandles::resolve(obj), JNI_OK);
610 ShouldNotReachHere();
611 return 0; // Mute compiler.
612 JNI_END
613
614
615 DT_RETURN_MARK_DECL(ThrowNew, jint
616 , HOTSPOT_JNI_THROWNEW_RETURN(_ret_ref));
617
618 JNI_ENTRY(jint, jni_ThrowNew(JNIEnv *env, jclass clazz, const char *message))
619 JNIWrapper("ThrowNew");
620
621 HOTSPOT_JNI_THROWNEW_ENTRY(env, clazz, (char *) message);
622
623 jint ret = JNI_OK;
624 DT_RETURN_MARK(ThrowNew, jint, (const jint&)ret);
625
626 InstanceKlass* k = InstanceKlass::cast(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz)));
627 Symbol* name = k->name();
628 Handle class_loader (THREAD, k->class_loader());
629 Handle protection_domain (THREAD, k->protection_domain());
630 THROW_MSG_LOADER_(name, (char *)message, class_loader, protection_domain, JNI_OK);
631 ShouldNotReachHere();
632 return 0; // Mute compiler.
633 JNI_END
634
635
636 // JNI functions only transform a pending async exception to a synchronous
637 // exception in ExceptionOccurred and ExceptionCheck calls, since
638 // delivering an async exception in other places won't change the native
639 // code's control flow and would be harmful when native code further calls
640 // JNI functions with a pending exception. Async exception is also checked
641 // during the call, so ExceptionOccurred/ExceptionCheck won't return
642 // false but deliver the async exception at the very end during
643 // state transition.
644
645 static void jni_check_async_exceptions(JavaThread *thread) {
646 assert(thread == Thread::current(), "must be itself");
647 thread->check_and_handle_async_exceptions();
648 }
649
650 JNI_ENTRY_NO_PRESERVE(jthrowable, jni_ExceptionOccurred(JNIEnv *env))
651 JNIWrapper("ExceptionOccurred");
652
653 HOTSPOT_JNI_EXCEPTIONOCCURRED_ENTRY(env);
654
655 jni_check_async_exceptions(thread);
656 oop exception = thread->pending_exception();
657 jthrowable ret = (jthrowable) JNIHandles::make_local(env, exception);
658
659 HOTSPOT_JNI_EXCEPTIONOCCURRED_RETURN(ret);
660 return ret;
661 JNI_END
662
663
664 JNI_ENTRY_NO_PRESERVE(void, jni_ExceptionDescribe(JNIEnv *env))
665 JNIWrapper("ExceptionDescribe");
666
667 HOTSPOT_JNI_EXCEPTIONDESCRIBE_ENTRY(env);
668
669 if (thread->has_pending_exception()) {
670 Handle ex(thread, thread->pending_exception());
671 thread->clear_pending_exception();
672 if (ex->is_a(SystemDictionary::ThreadDeath_klass())) {
673 // Don't print anything if we are being killed.
674 } else {
675 jio_fprintf(defaultStream::error_stream(), "Exception ");
676 if (thread != NULL && thread->threadObj() != NULL) {
677 ResourceMark rm(THREAD);
678 jio_fprintf(defaultStream::error_stream(),
679 "in thread \"%s\" ", thread->get_thread_name());
680 }
681 if (ex->is_a(SystemDictionary::Throwable_klass())) {
682 JavaValue result(T_VOID);
683 JavaCalls::call_virtual(&result,
684 ex,
685 SystemDictionary::Throwable_klass(),
686 vmSymbols::printStackTrace_name(),
687 vmSymbols::void_method_signature(),
688 THREAD);
689 // If an exception is thrown in the call it gets thrown away. Not much
690 // we can do with it. The native code that calls this, does not check
691 // for the exception - hence, it might still be in the thread when DestroyVM gets
692 // called, potentially causing a few asserts to trigger - since no pending exception
693 // is expected.
694 CLEAR_PENDING_EXCEPTION;
695 } else {
696 ResourceMark rm(THREAD);
697 jio_fprintf(defaultStream::error_stream(),
698 ". Uncaught exception of type %s.",
699 ex->klass()->external_name());
700 }
701 }
702 }
703
704 HOTSPOT_JNI_EXCEPTIONDESCRIBE_RETURN();
705 JNI_END
706
707
708 JNI_ENTRY_NO_PRESERVE(void, jni_ExceptionClear(JNIEnv *env))
709 JNIWrapper("ExceptionClear");
710
711 HOTSPOT_JNI_EXCEPTIONCLEAR_ENTRY(env);
712
713 // The jni code might be using this API to clear java thrown exception.
714 // So just mark jvmti thread exception state as exception caught.
715 JvmtiThreadState *state = JavaThread::current()->jvmti_thread_state();
716 if (state != NULL && state->is_exception_detected()) {
717 state->set_exception_caught();
718 }
719 thread->clear_pending_exception();
720
721 HOTSPOT_JNI_EXCEPTIONCLEAR_RETURN();
722 JNI_END
723
724
725 JNI_ENTRY(void, jni_FatalError(JNIEnv *env, const char *msg))
726 JNIWrapper("FatalError");
727
728 HOTSPOT_JNI_FATALERROR_ENTRY(env, (char *) msg);
729
730 tty->print_cr("FATAL ERROR in native method: %s", msg);
731 thread->print_stack();
732 os::abort(); // Dump core and abort
733 JNI_END
734
735
736 JNI_ENTRY(jint, jni_PushLocalFrame(JNIEnv *env, jint capacity))
737 JNIWrapper("PushLocalFrame");
738
739 HOTSPOT_JNI_PUSHLOCALFRAME_ENTRY(env, capacity);
740
741 //%note jni_11
742 if (capacity < 0 ||
743 ((MaxJNILocalCapacity > 0) && (capacity > MaxJNILocalCapacity))) {
744 HOTSPOT_JNI_PUSHLOCALFRAME_RETURN((uint32_t)JNI_ERR);
745 return JNI_ERR;
746 }
747 JNIHandleBlock* old_handles = thread->active_handles();
748 JNIHandleBlock* new_handles = JNIHandleBlock::allocate_block(thread);
749 assert(new_handles != NULL, "should not be NULL");
750 new_handles->set_pop_frame_link(old_handles);
751 thread->set_active_handles(new_handles);
752 jint ret = JNI_OK;
753 HOTSPOT_JNI_PUSHLOCALFRAME_RETURN(ret);
754 return ret;
755 JNI_END
756
757
758 JNI_ENTRY(jobject, jni_PopLocalFrame(JNIEnv *env, jobject result))
759 JNIWrapper("PopLocalFrame");
760
761 HOTSPOT_JNI_POPLOCALFRAME_ENTRY(env, result);
762
763 //%note jni_11
764 Handle result_handle(thread, JNIHandles::resolve(result));
765 JNIHandleBlock* old_handles = thread->active_handles();
766 JNIHandleBlock* new_handles = old_handles->pop_frame_link();
767 if (new_handles != NULL) {
768 // As a sanity check we only release the handle blocks if the pop_frame_link is not NULL.
769 // This way code will still work if PopLocalFrame is called without a corresponding
770 // PushLocalFrame call. Note that we set the pop_frame_link to NULL explicitly, otherwise
771 // the release_block call will release the blocks.
772 thread->set_active_handles(new_handles);
773 old_handles->set_pop_frame_link(NULL); // clear link we won't release new_handles below
774 JNIHandleBlock::release_block(old_handles, thread); // may block
775 result = JNIHandles::make_local(thread, result_handle());
776 }
777 HOTSPOT_JNI_POPLOCALFRAME_RETURN(result);
778 return result;
779 JNI_END
780
781
782 JNI_ENTRY(jobject, jni_NewGlobalRef(JNIEnv *env, jobject ref))
783 JNIWrapper("NewGlobalRef");
784
785 HOTSPOT_JNI_NEWGLOBALREF_ENTRY(env, ref);
786
787 Handle ref_handle(thread, JNIHandles::resolve(ref));
788 jobject ret = JNIHandles::make_global(ref_handle);
789
790 HOTSPOT_JNI_NEWGLOBALREF_RETURN(ret);
791 return ret;
792 JNI_END
793
794 // Must be JNI_ENTRY (with HandleMark)
795 JNI_ENTRY_NO_PRESERVE(void, jni_DeleteGlobalRef(JNIEnv *env, jobject ref))
796 JNIWrapper("DeleteGlobalRef");
797
798 HOTSPOT_JNI_DELETEGLOBALREF_ENTRY(env, ref);
799
800 JNIHandles::destroy_global(ref);
801
802 HOTSPOT_JNI_DELETEGLOBALREF_RETURN();
803 JNI_END
804
805 JNI_ENTRY_NO_PRESERVE(void, jni_DeleteLocalRef(JNIEnv *env, jobject obj))
806 JNIWrapper("DeleteLocalRef");
807
808 HOTSPOT_JNI_DELETELOCALREF_ENTRY(env, obj);
809
810 JNIHandles::destroy_local(obj);
811
812 HOTSPOT_JNI_DELETELOCALREF_RETURN();
813 JNI_END
814
815 JNI_ENTRY_NO_PRESERVE(jboolean, jni_IsSameObject(JNIEnv *env, jobject r1, jobject r2))
816 JNIWrapper("IsSameObject");
817
818 HOTSPOT_JNI_ISSAMEOBJECT_ENTRY(env, r1, r2);
819
820 jboolean ret = JNIHandles::is_same_object(r1, r2) ? JNI_TRUE : JNI_FALSE;
821
822 HOTSPOT_JNI_ISSAMEOBJECT_RETURN(ret);
823 return ret;
824 JNI_END
825
826
827 JNI_ENTRY(jobject, jni_NewLocalRef(JNIEnv *env, jobject ref))
828 JNIWrapper("NewLocalRef");
829
830 HOTSPOT_JNI_NEWLOCALREF_ENTRY(env, ref);
831
832 jobject ret = JNIHandles::make_local(env, JNIHandles::resolve(ref));
833
834 HOTSPOT_JNI_NEWLOCALREF_RETURN(ret);
835 return ret;
836 JNI_END
837
838 JNI_LEAF(jint, jni_EnsureLocalCapacity(JNIEnv *env, jint capacity))
839 JNIWrapper("EnsureLocalCapacity");
840
841 HOTSPOT_JNI_ENSURELOCALCAPACITY_ENTRY(env, capacity);
842
843 jint ret;
844 if (capacity >= 0 &&
845 ((MaxJNILocalCapacity <= 0) || (capacity <= MaxJNILocalCapacity))) {
846 ret = JNI_OK;
847 } else {
848 ret = JNI_ERR;
849 }
850
851 HOTSPOT_JNI_ENSURELOCALCAPACITY_RETURN(ret);
852 return ret;
853 JNI_END
854
855 // Return the Handle Type
856 JNI_LEAF(jobjectRefType, jni_GetObjectRefType(JNIEnv *env, jobject obj))
857 JNIWrapper("GetObjectRefType");
858
859 HOTSPOT_JNI_GETOBJECTREFTYPE_ENTRY(env, obj);
860
861 jobjectRefType ret = JNIInvalidRefType;
862 if (obj != NULL) {
863 ret = JNIHandles::handle_type(thread, obj);
864 }
865
866 HOTSPOT_JNI_GETOBJECTREFTYPE_RETURN((void *) ret);
867 return ret;
868 JNI_END
869
870
871 class JNI_ArgumentPusher : public SignatureIterator {
872 protected:
873 JavaCallArguments* _arguments;
874
875 virtual void get_bool () = 0;
876 virtual void get_char () = 0;
877 virtual void get_short () = 0;
878 virtual void get_byte () = 0;
879 virtual void get_int () = 0;
880 virtual void get_long () = 0;
881 virtual void get_float () = 0;
882 virtual void get_double () = 0;
883 virtual void get_object () = 0;
884 virtual void get_valuetype() = 0;
885
886 JNI_ArgumentPusher(Symbol* signature) : SignatureIterator(signature) {
887 this->_return_type = T_ILLEGAL;
888 _arguments = NULL;
889 }
890
891 public:
892 virtual void iterate( uint64_t fingerprint ) = 0;
893
894 void set_java_argument_object(JavaCallArguments *arguments) { _arguments = arguments; }
895
896 inline void do_bool() { if (!is_return_type()) get_bool(); }
897 inline void do_char() { if (!is_return_type()) get_char(); }
898 inline void do_short() { if (!is_return_type()) get_short(); }
899 inline void do_byte() { if (!is_return_type()) get_byte(); }
900 inline void do_int() { if (!is_return_type()) get_int(); }
901 inline void do_long() { if (!is_return_type()) get_long(); }
902 inline void do_float() { if (!is_return_type()) get_float(); }
903 inline void do_double() { if (!is_return_type()) get_double(); }
904 inline void do_object(int begin, int end) { if (!is_return_type()) get_object(); }
905 inline void do_valuetype(int begin, int end) { if (!is_return_type()) get_valuetype(); }
906 inline void do_array(int begin, int end) { if (!is_return_type()) get_object(); } // do_array uses get_object -- there is no get_array
907 inline void do_void() { }
908
909 JavaCallArguments* arguments() { return _arguments; }
910 void push_receiver(Handle h) { _arguments->push_oop(h); }
911 };
912
913
914 class JNI_ArgumentPusherVaArg : public JNI_ArgumentPusher {
915 protected:
916 va_list _ap;
917
918 inline void get_bool() {
919 // Normalize boolean arguments from native code by converting 1-255 to JNI_TRUE and
920 // 0 to JNI_FALSE. Boolean return values from native are normalized the same in
921 // TemplateInterpreterGenerator::generate_result_handler_for and
922 // SharedRuntime::generate_native_wrapper.
923 jboolean b = va_arg(_ap, jint);
924 _arguments->push_int((jint)(b == 0 ? JNI_FALSE : JNI_TRUE));
925 }
926 inline void get_char() { _arguments->push_int(va_arg(_ap, jint)); } // char is coerced to int when using va_arg
927 inline void get_short() { _arguments->push_int(va_arg(_ap, jint)); } // short is coerced to int when using va_arg
928 inline void get_byte() { _arguments->push_int(va_arg(_ap, jint)); } // byte is coerced to int when using va_arg
929 inline void get_int() { _arguments->push_int(va_arg(_ap, jint)); }
930
931 // each of these paths is exercized by the various jck Call[Static,Nonvirtual,][Void,Int,..]Method[A,V,] tests
932
933 inline void get_long() { _arguments->push_long(va_arg(_ap, jlong)); }
934 inline void get_float() { _arguments->push_float((jfloat)va_arg(_ap, jdouble)); } // float is coerced to double w/ va_arg
935 inline void get_double() { _arguments->push_double(va_arg(_ap, jdouble)); }
936 inline void get_object() { _arguments->push_jobject(va_arg(_ap, jobject)); }
937 inline void get_valuetype() { _arguments->push_jobject(va_arg(_ap, jobject)); }
938
939 inline void set_ap(va_list rap) {
940 va_copy(_ap, rap);
941 }
942
943 public:
944 JNI_ArgumentPusherVaArg(Symbol* signature, va_list rap)
945 : JNI_ArgumentPusher(signature) {
946 set_ap(rap);
947 }
948 JNI_ArgumentPusherVaArg(jmethodID method_id, va_list rap)
949 : JNI_ArgumentPusher(Method::resolve_jmethod_id(method_id)->signature()) {
950 set_ap(rap);
951 }
952
953 // Optimized path if we have the bitvector form of signature
954 void iterate( uint64_t fingerprint ) {
955 if (fingerprint == (uint64_t)CONST64(-1)) {
956 SignatureIterator::iterate(); // Must be too many arguments
957 } else {
958 _return_type = (BasicType)((fingerprint >> static_feature_size) &
959 result_feature_mask);
960
961 assert(fingerprint, "Fingerprint should not be 0");
962 fingerprint = fingerprint >> (static_feature_size + result_feature_size);
963 while ( 1 ) {
964 switch ( fingerprint & parameter_feature_mask ) {
965 case bool_parm:
966 get_bool();
967 break;
968 case char_parm:
969 get_char();
970 break;
971 case short_parm:
972 get_short();
973 break;
974 case byte_parm:
975 get_byte();
976 break;
977 case int_parm:
978 get_int();
979 break;
980 case obj_parm:
981 get_object();
982 break;
983 case long_parm:
984 get_long();
985 break;
986 case float_parm:
987 get_float();
988 break;
989 case double_parm:
990 get_double();
991 break;
992 case done_parm:
993 return;
994 break;
995 default:
996 ShouldNotReachHere();
997 break;
998 }
999 fingerprint >>= parameter_feature_size;
1000 }
1001 }
1002 }
1003 };
1004
1005
1006 class JNI_ArgumentPusherArray : public JNI_ArgumentPusher {
1007 protected:
1008 const jvalue *_ap;
1009
1010 inline void get_bool() {
1011 // Normalize boolean arguments from native code by converting 1-255 to JNI_TRUE and
1012 // 0 to JNI_FALSE. Boolean return values from native are normalized the same in
1013 // TemplateInterpreterGenerator::generate_result_handler_for and
1014 // SharedRuntime::generate_native_wrapper.
1015 jboolean b = (_ap++)->z;
1016 _arguments->push_int((jint)(b == 0 ? JNI_FALSE : JNI_TRUE));
1017 }
1018 inline void get_char() { _arguments->push_int((jint)(_ap++)->c); }
1019 inline void get_short() { _arguments->push_int((jint)(_ap++)->s); }
1020 inline void get_byte() { _arguments->push_int((jint)(_ap++)->b); }
1021 inline void get_int() { _arguments->push_int((jint)(_ap++)->i); }
1022
1023 inline void get_long() { _arguments->push_long((_ap++)->j); }
1024 inline void get_float() { _arguments->push_float((_ap++)->f); }
1025 inline void get_double() { _arguments->push_double((_ap++)->d);}
1026 inline void get_object() { _arguments->push_jobject((_ap++)->l); }
1027 // value types are implemented with oops too
1028 inline void get_valuetype() { _arguments->push_jobject((_ap++)->l); }
1029
1030 inline void set_ap(const jvalue *rap) { _ap = rap; }
1031
1032 public:
1033 JNI_ArgumentPusherArray(Symbol* signature, const jvalue *rap)
1034 : JNI_ArgumentPusher(signature) {
1035 set_ap(rap);
1036 }
1037 JNI_ArgumentPusherArray(jmethodID method_id, const jvalue *rap)
1038 : JNI_ArgumentPusher(Method::resolve_jmethod_id(method_id)->signature()) {
1039 set_ap(rap);
1040 }
1041
1042 // Optimized path if we have the bitvector form of signature
1043 void iterate( uint64_t fingerprint ) {
1044 if (fingerprint == (uint64_t)CONST64(-1)) {
1045 SignatureIterator::iterate(); // Must be too many arguments
1046 } else {
1047 _return_type = (BasicType)((fingerprint >> static_feature_size) &
1048 result_feature_mask);
1049 assert(fingerprint, "Fingerprint should not be 0");
1050 fingerprint = fingerprint >> (static_feature_size + result_feature_size);
1051 while ( 1 ) {
1052 switch ( fingerprint & parameter_feature_mask ) {
1053 case bool_parm:
1054 get_bool();
1055 break;
1056 case char_parm:
1057 get_char();
1058 break;
1059 case short_parm:
1060 get_short();
1061 break;
1062 case byte_parm:
1063 get_byte();
1064 break;
1065 case int_parm:
1066 get_int();
1067 break;
1068 case obj_parm:
1069 get_object();
1070 break;
1071 case long_parm:
1072 get_long();
1073 break;
1074 case float_parm:
1075 get_float();
1076 break;
1077 case double_parm:
1078 get_double();
1079 break;
1080 case done_parm:
1081 return;
1082 break;
1083 default:
1084 ShouldNotReachHere();
1085 break;
1086 }
1087 fingerprint >>= parameter_feature_size;
1088 }
1089 }
1090 }
1091 };
1092
1093
1094 enum JNICallType {
1095 JNI_STATIC,
1096 JNI_VIRTUAL,
1097 JNI_NONVIRTUAL
1098 };
1099
1100
1101
1102 static void jni_invoke_static(JNIEnv *env, JavaValue* result, jobject receiver, JNICallType call_type, jmethodID method_id, JNI_ArgumentPusher *args, TRAPS) {
1103 methodHandle method(THREAD, Method::resolve_jmethod_id(method_id));
1104
1105 // Create object to hold arguments for the JavaCall, and associate it with
1106 // the jni parser
1107 ResourceMark rm(THREAD);
1108 int number_of_parameters = method->size_of_parameters();
1109 JavaCallArguments java_args(number_of_parameters);
1110 args->set_java_argument_object(&java_args);
1111
1112 assert(method->is_static(), "method should be static");
1113
1114 // Fill out JavaCallArguments object
1115 args->iterate( Fingerprinter(method).fingerprint() );
1116 // Initialize result type
1117 result->set_type(args->get_ret_type());
1118
1119 // Invoke the method. Result is returned as oop.
1120 JavaCalls::call(result, method, &java_args, CHECK);
1121
1122 // Convert result
1123 if (result->get_type() == T_OBJECT || result->get_type() == T_ARRAY || result->get_type() == T_VALUETYPE) {
1124 result->set_jobject(JNIHandles::make_local(env, (oop) result->get_jobject()));
1125 }
1126 }
1127
1128
1129 static void jni_invoke_nonstatic(JNIEnv *env, JavaValue* result, jobject receiver, JNICallType call_type, jmethodID method_id, JNI_ArgumentPusher *args, TRAPS) {
1130 oop recv = JNIHandles::resolve(receiver);
1131 if (recv == NULL) {
1132 THROW(vmSymbols::java_lang_NullPointerException());
1133 }
1134 Handle h_recv(THREAD, recv);
1135
1136 int number_of_parameters;
1137 Method* selected_method;
1138 {
1139 Method* m = Method::resolve_jmethod_id(method_id);
1140 number_of_parameters = m->size_of_parameters();
1141 Klass* holder = m->method_holder();
1142 if (call_type != JNI_VIRTUAL) {
1143 selected_method = m;
1144 } else if (!m->has_itable_index()) {
1145 // non-interface call -- for that little speed boost, don't handlize
1146 debug_only(NoSafepointVerifier nosafepoint;)
1147 // jni_GetMethodID makes sure class is linked and initialized
1148 // so m should have a valid vtable index.
1149 assert(m->valid_vtable_index(), "no valid vtable index");
1150 int vtbl_index = m->vtable_index();
1151 if (vtbl_index != Method::nonvirtual_vtable_index) {
1152 selected_method = h_recv->klass()->method_at_vtable(vtbl_index);
1153 } else {
1154 // final method
1155 selected_method = m;
1156 }
1157 } else {
1158 // interface call
1159 int itbl_index = m->itable_index();
1160 Klass* k = h_recv->klass();
1161 selected_method = InstanceKlass::cast(k)->method_at_itable(holder, itbl_index, CHECK);
1162 }
1163 }
1164
1165 methodHandle method(THREAD, selected_method);
1166
1167 // Create object to hold arguments for the JavaCall, and associate it with
1168 // the jni parser
1169 ResourceMark rm(THREAD);
1170 JavaCallArguments java_args(number_of_parameters);
1171 args->set_java_argument_object(&java_args);
1172
1173 // handle arguments
1174 assert(!method->is_static(), "method %s should not be static", method->name_and_sig_as_C_string());
1175 args->push_receiver(h_recv); // Push jobject handle
1176
1177 // Fill out JavaCallArguments object
1178 args->iterate( Fingerprinter(method).fingerprint() );
1179 // Initialize result type
1180 result->set_type(args->get_ret_type());
1181
1182 // Invoke the method. Result is returned as oop.
1183 JavaCalls::call(result, method, &java_args, CHECK);
1184
1185 // Convert result
1186 if (result->get_type() == T_OBJECT || result->get_type() == T_ARRAY || result->get_type() == T_VALUETYPE) {
1187 result->set_jobject(JNIHandles::make_local(env, (oop) result->get_jobject()));
1188 }
1189 }
1190
1191
1192 static instanceOop alloc_object(jclass clazz, TRAPS) {
1193 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz));
1194 if (k == NULL) {
1195 ResourceMark rm(THREAD);
1196 THROW_(vmSymbols::java_lang_InstantiationException(), NULL);
1197 }
1198 k->check_valid_for_instantiation(false, CHECK_NULL);
1199 k->initialize(CHECK_NULL);
1200 instanceOop ih = InstanceKlass::cast(k)->allocate_instance(THREAD);
1201 return ih;
1202 }
1203
1204 DT_RETURN_MARK_DECL(AllocObject, jobject
1205 , HOTSPOT_JNI_ALLOCOBJECT_RETURN(_ret_ref));
1206
1207 JNI_ENTRY(jobject, jni_AllocObject(JNIEnv *env, jclass clazz))
1208 JNIWrapper("AllocObject");
1209
1210 HOTSPOT_JNI_ALLOCOBJECT_ENTRY(env, clazz);
1211
1212 jobject ret = NULL;
1213 DT_RETURN_MARK(AllocObject, jobject, (const jobject&)ret);
1214
1215 instanceOop i = alloc_object(clazz, CHECK_NULL);
1216 ret = JNIHandles::make_local(env, i);
1217 return ret;
1218 JNI_END
1219
1220 DT_RETURN_MARK_DECL(NewObjectA, jobject
1221 , HOTSPOT_JNI_NEWOBJECTA_RETURN(_ret_ref));
1222
1223 JNI_ENTRY(jobject, jni_NewObjectA(JNIEnv *env, jclass clazz, jmethodID methodID, const jvalue *args))
1224 JNIWrapper("NewObjectA");
1225
1226 HOTSPOT_JNI_NEWOBJECTA_ENTRY(env, clazz, (uintptr_t) methodID);
1227
1228 jobject obj = NULL;
1229 DT_RETURN_MARK(NewObjectA, jobject, (const jobject)obj);
1230
1231 instanceOop i = alloc_object(clazz, CHECK_NULL);
1232 obj = JNIHandles::make_local(env, i);
1233 JavaValue jvalue(T_VOID);
1234 JNI_ArgumentPusherArray ap(methodID, args);
1235 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_NULL);
1236 return obj;
1237 JNI_END
1238
1239
1240 DT_RETURN_MARK_DECL(NewObjectV, jobject
1241 , HOTSPOT_JNI_NEWOBJECTV_RETURN(_ret_ref));
1242
1243 JNI_ENTRY(jobject, jni_NewObjectV(JNIEnv *env, jclass clazz, jmethodID methodID, va_list args))
1244 JNIWrapper("NewObjectV");
1245
1246 HOTSPOT_JNI_NEWOBJECTV_ENTRY(env, clazz, (uintptr_t) methodID);
1247
1248 jobject obj = NULL;
1249 DT_RETURN_MARK(NewObjectV, jobject, (const jobject&)obj);
1250
1251 instanceOop i = alloc_object(clazz, CHECK_NULL);
1252 obj = JNIHandles::make_local(env, i);
1253 JavaValue jvalue(T_VOID);
1254 JNI_ArgumentPusherVaArg ap(methodID, args);
1255 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_NULL);
1256 return obj;
1257 JNI_END
1258
1259
1260 DT_RETURN_MARK_DECL(NewObject, jobject
1261 , HOTSPOT_JNI_NEWOBJECT_RETURN(_ret_ref));
1262
1263 JNI_ENTRY(jobject, jni_NewObject(JNIEnv *env, jclass clazz, jmethodID methodID, ...))
1264 JNIWrapper("NewObject");
1265
1266 HOTSPOT_JNI_NEWOBJECT_ENTRY(env, clazz, (uintptr_t) methodID);
1267
1268 jobject obj = NULL;
1269 DT_RETURN_MARK(NewObject, jobject, (const jobject&)obj);
1270
1271 instanceOop i = alloc_object(clazz, CHECK_NULL);
1272 obj = JNIHandles::make_local(env, i);
1273 va_list args;
1274 va_start(args, methodID);
1275 JavaValue jvalue(T_VOID);
1276 JNI_ArgumentPusherVaArg ap(methodID, args);
1277 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_NULL);
1278 va_end(args);
1279 return obj;
1280 JNI_END
1281
1282
1283 JNI_ENTRY(jclass, jni_GetObjectClass(JNIEnv *env, jobject obj))
1284 JNIWrapper("GetObjectClass");
1285
1286 HOTSPOT_JNI_GETOBJECTCLASS_ENTRY(env, obj);
1287
1288 Klass* k = JNIHandles::resolve_non_null(obj)->klass();
1289 jclass ret =
1290 (jclass) JNIHandles::make_local(env, k->java_mirror());
1291
1292 HOTSPOT_JNI_GETOBJECTCLASS_RETURN(ret);
1293 return ret;
1294 JNI_END
1295
1296 JNI_ENTRY_NO_PRESERVE(jboolean, jni_IsInstanceOf(JNIEnv *env, jobject obj, jclass clazz))
1297 JNIWrapper("IsInstanceOf");
1298
1299 HOTSPOT_JNI_ISINSTANCEOF_ENTRY(env, obj, clazz);
1300
1301 jboolean ret = JNI_TRUE;
1302 if (obj != NULL) {
1303 ret = JNI_FALSE;
1304 Klass* k = java_lang_Class::as_Klass(
1305 JNIHandles::resolve_non_null(clazz));
1306 if (k != NULL) {
1307 ret = JNIHandles::resolve_non_null(obj)->is_a(k) ? JNI_TRUE : JNI_FALSE;
1308 }
1309 }
1310
1311 HOTSPOT_JNI_ISINSTANCEOF_RETURN(ret);
1312 return ret;
1313 JNI_END
1314
1315
1316 static jmethodID get_method_id(JNIEnv *env, jclass clazz, const char *name_str,
1317 const char *sig, bool is_static, TRAPS) {
1318 // %%%% This code should probably just call into a method in the LinkResolver
1319 //
1320 // The class should have been loaded (we have an instance of the class
1321 // passed in) so the method and signature should already be in the symbol
1322 // table. If they're not there, the method doesn't exist.
1323 const char *name_to_probe = (name_str == NULL)
1324 ? vmSymbols::object_initializer_name()->as_C_string()
1325 : name_str;
1326 TempNewSymbol name = SymbolTable::probe(name_to_probe, (int)strlen(name_to_probe));
1327 TempNewSymbol signature = SymbolTable::probe(sig, (int)strlen(sig));
1328
1329 if (name == NULL || signature == NULL) {
1330 THROW_MSG_0(vmSymbols::java_lang_NoSuchMethodError(), name_str);
1331 }
1332
1333 Klass* klass = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz));
1334
1335 // Throw a NoSuchMethodError exception if we have an instance of a
1336 // primitive java.lang.Class
1337 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(clazz))) {
1338 ResourceMark rm;
1339 THROW_MSG_0(vmSymbols::java_lang_NoSuchMethodError(), err_msg("%s%s.%s%s", is_static ? "static " : "", klass->signature_name(), name_str, sig));
1340 }
1341
1342 // Make sure class is linked and initialized before handing id's out to
1343 // Method*s.
1344 klass->initialize(CHECK_NULL);
1345
1346 Method* m;
1347 if (name == vmSymbols::object_initializer_name() ||
1348 name == vmSymbols::class_initializer_name()) {
1349 // Never search superclasses for constructors
1350 if (klass->is_instance_klass()) {
1351 m = InstanceKlass::cast(klass)->find_method(name, signature);
1352 } else {
1353 m = NULL;
1354 }
1355 } else {
1356 m = klass->lookup_method(name, signature);
1357 if (m == NULL && klass->is_instance_klass()) {
1358 m = InstanceKlass::cast(klass)->lookup_method_in_ordered_interfaces(name, signature);
1359 }
1360 }
1361 if (m == NULL || (m->is_static() != is_static)) {
1362 ResourceMark rm;
1363 THROW_MSG_0(vmSymbols::java_lang_NoSuchMethodError(), err_msg("%s%s.%s%s", is_static ? "static " : "", klass->signature_name(), name_str, sig));
1364 }
1365 return m->jmethod_id();
1366 }
1367
1368
1369 JNI_ENTRY(jmethodID, jni_GetMethodID(JNIEnv *env, jclass clazz,
1370 const char *name, const char *sig))
1371 JNIWrapper("GetMethodID");
1372 HOTSPOT_JNI_GETMETHODID_ENTRY(env, clazz, (char *) name, (char *) sig);
1373 jmethodID ret = get_method_id(env, clazz, name, sig, false, thread);
1374 HOTSPOT_JNI_GETMETHODID_RETURN((uintptr_t) ret);
1375 return ret;
1376 JNI_END
1377
1378
1379 JNI_ENTRY(jmethodID, jni_GetStaticMethodID(JNIEnv *env, jclass clazz,
1380 const char *name, const char *sig))
1381 JNIWrapper("GetStaticMethodID");
1382 HOTSPOT_JNI_GETSTATICMETHODID_ENTRY(env, (char *) clazz, (char *) name, (char *)sig);
1383 jmethodID ret = get_method_id(env, clazz, name, sig, true, thread);
1384 HOTSPOT_JNI_GETSTATICMETHODID_RETURN((uintptr_t) ret);
1385 return ret;
1386 JNI_END
1387
1388
1389
1390 //
1391 // Calling Methods
1392 //
1393
1394
1395 #define DEFINE_CALLMETHOD(ResultType, Result, Tag \
1396 , EntryProbe, ReturnProbe) \
1397 \
1398 DT_RETURN_MARK_DECL_FOR(Result, Call##Result##Method, ResultType \
1399 , ReturnProbe); \
1400 \
1401 JNI_ENTRY(ResultType, \
1402 jni_Call##Result##Method(JNIEnv *env, jobject obj, jmethodID methodID, ...)) \
1403 JNIWrapper("Call" XSTR(Result) "Method"); \
1404 \
1405 EntryProbe; \
1406 ResultType ret = 0;\
1407 DT_RETURN_MARK_FOR(Result, Call##Result##Method, ResultType, \
1408 (const ResultType&)ret);\
1409 \
1410 va_list args; \
1411 va_start(args, methodID); \
1412 JavaValue jvalue(Tag); \
1413 JNI_ArgumentPusherVaArg ap(methodID, args); \
1414 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK_0); \
1415 va_end(args); \
1416 ret = jvalue.get_##ResultType(); \
1417 return ret;\
1418 JNI_END
1419
1420 // the runtime type of subword integral basic types is integer
1421 DEFINE_CALLMETHOD(jboolean, Boolean, T_BOOLEAN
1422 , HOTSPOT_JNI_CALLBOOLEANMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1423 HOTSPOT_JNI_CALLBOOLEANMETHOD_RETURN(_ret_ref))
1424 DEFINE_CALLMETHOD(jbyte, Byte, T_BYTE
1425 , HOTSPOT_JNI_CALLBYTEMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1426 HOTSPOT_JNI_CALLBYTEMETHOD_RETURN(_ret_ref))
1427 DEFINE_CALLMETHOD(jchar, Char, T_CHAR
1428 , HOTSPOT_JNI_CALLCHARMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1429 HOTSPOT_JNI_CALLCHARMETHOD_RETURN(_ret_ref))
1430 DEFINE_CALLMETHOD(jshort, Short, T_SHORT
1431 , HOTSPOT_JNI_CALLSHORTMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1432 HOTSPOT_JNI_CALLSHORTMETHOD_RETURN(_ret_ref))
1433
1434 DEFINE_CALLMETHOD(jobject, Object, T_OBJECT
1435 , HOTSPOT_JNI_CALLOBJECTMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1436 HOTSPOT_JNI_CALLOBJECTMETHOD_RETURN(_ret_ref))
1437 DEFINE_CALLMETHOD(jint, Int, T_INT,
1438 HOTSPOT_JNI_CALLINTMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1439 HOTSPOT_JNI_CALLINTMETHOD_RETURN(_ret_ref))
1440 DEFINE_CALLMETHOD(jlong, Long, T_LONG
1441 , HOTSPOT_JNI_CALLLONGMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1442 HOTSPOT_JNI_CALLLONGMETHOD_RETURN(_ret_ref))
1443 // Float and double probes don't return value because dtrace doesn't currently support it
1444 DEFINE_CALLMETHOD(jfloat, Float, T_FLOAT
1445 , HOTSPOT_JNI_CALLFLOATMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1446 HOTSPOT_JNI_CALLFLOATMETHOD_RETURN())
1447 DEFINE_CALLMETHOD(jdouble, Double, T_DOUBLE
1448 , HOTSPOT_JNI_CALLDOUBLEMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1449 HOTSPOT_JNI_CALLDOUBLEMETHOD_RETURN())
1450
1451 #define DEFINE_CALLMETHODV(ResultType, Result, Tag \
1452 , EntryProbe, ReturnProbe) \
1453 \
1454 DT_RETURN_MARK_DECL_FOR(Result, Call##Result##MethodV, ResultType \
1455 , ReturnProbe); \
1456 \
1457 JNI_ENTRY(ResultType, \
1458 jni_Call##Result##MethodV(JNIEnv *env, jobject obj, jmethodID methodID, va_list args)) \
1459 JNIWrapper("Call" XSTR(Result) "MethodV"); \
1460 \
1461 EntryProbe;\
1462 ResultType ret = 0;\
1463 DT_RETURN_MARK_FOR(Result, Call##Result##MethodV, ResultType, \
1464 (const ResultType&)ret);\
1465 \
1466 JavaValue jvalue(Tag); \
1467 JNI_ArgumentPusherVaArg ap(methodID, args); \
1468 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK_0); \
1469 ret = jvalue.get_##ResultType(); \
1470 return ret;\
1471 JNI_END
1472
1473 // the runtime type of subword integral basic types is integer
1474 DEFINE_CALLMETHODV(jboolean, Boolean, T_BOOLEAN
1475 , HOTSPOT_JNI_CALLBOOLEANMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1476 HOTSPOT_JNI_CALLBOOLEANMETHODV_RETURN(_ret_ref))
1477 DEFINE_CALLMETHODV(jbyte, Byte, T_BYTE
1478 , HOTSPOT_JNI_CALLBYTEMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1479 HOTSPOT_JNI_CALLBYTEMETHODV_RETURN(_ret_ref))
1480 DEFINE_CALLMETHODV(jchar, Char, T_CHAR
1481 , HOTSPOT_JNI_CALLCHARMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1482 HOTSPOT_JNI_CALLCHARMETHODV_RETURN(_ret_ref))
1483 DEFINE_CALLMETHODV(jshort, Short, T_SHORT
1484 , HOTSPOT_JNI_CALLSHORTMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1485 HOTSPOT_JNI_CALLSHORTMETHODV_RETURN(_ret_ref))
1486
1487 DEFINE_CALLMETHODV(jobject, Object, T_OBJECT
1488 , HOTSPOT_JNI_CALLOBJECTMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1489 HOTSPOT_JNI_CALLOBJECTMETHODV_RETURN(_ret_ref))
1490 DEFINE_CALLMETHODV(jint, Int, T_INT,
1491 HOTSPOT_JNI_CALLINTMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1492 HOTSPOT_JNI_CALLINTMETHODV_RETURN(_ret_ref))
1493 DEFINE_CALLMETHODV(jlong, Long, T_LONG
1494 , HOTSPOT_JNI_CALLLONGMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1495 HOTSPOT_JNI_CALLLONGMETHODV_RETURN(_ret_ref))
1496 // Float and double probes don't return value because dtrace doesn't currently support it
1497 DEFINE_CALLMETHODV(jfloat, Float, T_FLOAT
1498 , HOTSPOT_JNI_CALLFLOATMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1499 HOTSPOT_JNI_CALLFLOATMETHODV_RETURN())
1500 DEFINE_CALLMETHODV(jdouble, Double, T_DOUBLE
1501 , HOTSPOT_JNI_CALLDOUBLEMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1502 HOTSPOT_JNI_CALLDOUBLEMETHODV_RETURN())
1503
1504 #define DEFINE_CALLMETHODA(ResultType, Result, Tag \
1505 , EntryProbe, ReturnProbe) \
1506 \
1507 DT_RETURN_MARK_DECL_FOR(Result, Call##Result##MethodA, ResultType \
1508 , ReturnProbe); \
1509 \
1510 JNI_ENTRY(ResultType, \
1511 jni_Call##Result##MethodA(JNIEnv *env, jobject obj, jmethodID methodID, const jvalue *args)) \
1512 JNIWrapper("Call" XSTR(Result) "MethodA"); \
1513 EntryProbe; \
1514 ResultType ret = 0;\
1515 DT_RETURN_MARK_FOR(Result, Call##Result##MethodA, ResultType, \
1516 (const ResultType&)ret);\
1517 \
1518 JavaValue jvalue(Tag); \
1519 JNI_ArgumentPusherArray ap(methodID, args); \
1520 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK_0); \
1521 ret = jvalue.get_##ResultType(); \
1522 return ret;\
1523 JNI_END
1524
1525 // the runtime type of subword integral basic types is integer
1526 DEFINE_CALLMETHODA(jboolean, Boolean, T_BOOLEAN
1527 , HOTSPOT_JNI_CALLBOOLEANMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1528 HOTSPOT_JNI_CALLBOOLEANMETHODA_RETURN(_ret_ref))
1529 DEFINE_CALLMETHODA(jbyte, Byte, T_BYTE
1530 , HOTSPOT_JNI_CALLBYTEMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1531 HOTSPOT_JNI_CALLBYTEMETHODA_RETURN(_ret_ref))
1532 DEFINE_CALLMETHODA(jchar, Char, T_CHAR
1533 , HOTSPOT_JNI_CALLCHARMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1534 HOTSPOT_JNI_CALLCHARMETHODA_RETURN(_ret_ref))
1535 DEFINE_CALLMETHODA(jshort, Short, T_SHORT
1536 , HOTSPOT_JNI_CALLSHORTMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1537 HOTSPOT_JNI_CALLSHORTMETHODA_RETURN(_ret_ref))
1538
1539 DEFINE_CALLMETHODA(jobject, Object, T_OBJECT
1540 , HOTSPOT_JNI_CALLOBJECTMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1541 HOTSPOT_JNI_CALLOBJECTMETHODA_RETURN(_ret_ref))
1542 DEFINE_CALLMETHODA(jint, Int, T_INT,
1543 HOTSPOT_JNI_CALLINTMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1544 HOTSPOT_JNI_CALLINTMETHODA_RETURN(_ret_ref))
1545 DEFINE_CALLMETHODA(jlong, Long, T_LONG
1546 , HOTSPOT_JNI_CALLLONGMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1547 HOTSPOT_JNI_CALLLONGMETHODA_RETURN(_ret_ref))
1548 // Float and double probes don't return value because dtrace doesn't currently support it
1549 DEFINE_CALLMETHODA(jfloat, Float, T_FLOAT
1550 , HOTSPOT_JNI_CALLFLOATMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1551 HOTSPOT_JNI_CALLFLOATMETHODA_RETURN())
1552 DEFINE_CALLMETHODA(jdouble, Double, T_DOUBLE
1553 , HOTSPOT_JNI_CALLDOUBLEMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1554 HOTSPOT_JNI_CALLDOUBLEMETHODA_RETURN())
1555
1556 DT_VOID_RETURN_MARK_DECL(CallVoidMethod, HOTSPOT_JNI_CALLVOIDMETHOD_RETURN());
1557 DT_VOID_RETURN_MARK_DECL(CallVoidMethodV, HOTSPOT_JNI_CALLVOIDMETHODV_RETURN());
1558 DT_VOID_RETURN_MARK_DECL(CallVoidMethodA, HOTSPOT_JNI_CALLVOIDMETHODA_RETURN());
1559
1560
1561 JNI_ENTRY(void, jni_CallVoidMethod(JNIEnv *env, jobject obj, jmethodID methodID, ...))
1562 JNIWrapper("CallVoidMethod");
1563 HOTSPOT_JNI_CALLVOIDMETHOD_ENTRY(env, obj, (uintptr_t) methodID);
1564 DT_VOID_RETURN_MARK(CallVoidMethod);
1565
1566 va_list args;
1567 va_start(args, methodID);
1568 JavaValue jvalue(T_VOID);
1569 JNI_ArgumentPusherVaArg ap(methodID, args);
1570 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK);
1571 va_end(args);
1572 JNI_END
1573
1574
1575 JNI_ENTRY(void, jni_CallVoidMethodV(JNIEnv *env, jobject obj, jmethodID methodID, va_list args))
1576 JNIWrapper("CallVoidMethodV");
1577 HOTSPOT_JNI_CALLVOIDMETHODV_ENTRY(env, obj, (uintptr_t) methodID);
1578 DT_VOID_RETURN_MARK(CallVoidMethodV);
1579
1580 JavaValue jvalue(T_VOID);
1581 JNI_ArgumentPusherVaArg ap(methodID, args);
1582 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK);
1583 JNI_END
1584
1585
1586 JNI_ENTRY(void, jni_CallVoidMethodA(JNIEnv *env, jobject obj, jmethodID methodID, const jvalue *args))
1587 JNIWrapper("CallVoidMethodA");
1588 HOTSPOT_JNI_CALLVOIDMETHODA_ENTRY(env, obj, (uintptr_t) methodID);
1589 DT_VOID_RETURN_MARK(CallVoidMethodA);
1590
1591 JavaValue jvalue(T_VOID);
1592 JNI_ArgumentPusherArray ap(methodID, args);
1593 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK);
1594 JNI_END
1595
1596
1597
1598 #define DEFINE_CALLNONVIRTUALMETHOD(ResultType, Result, Tag \
1599 , EntryProbe, ReturnProbe) \
1600 \
1601 DT_RETURN_MARK_DECL_FOR(Result, CallNonvirtual##Result##Method, ResultType \
1602 , ReturnProbe);\
1603 \
1604 JNI_ENTRY(ResultType, \
1605 jni_CallNonvirtual##Result##Method(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, ...)) \
1606 JNIWrapper("CallNonvitual" XSTR(Result) "Method"); \
1607 \
1608 EntryProbe;\
1609 ResultType ret;\
1610 DT_RETURN_MARK_FOR(Result, CallNonvirtual##Result##Method, ResultType, \
1611 (const ResultType&)ret);\
1612 \
1613 va_list args; \
1614 va_start(args, methodID); \
1615 JavaValue jvalue(Tag); \
1616 JNI_ArgumentPusherVaArg ap(methodID, args); \
1617 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_0); \
1618 va_end(args); \
1619 ret = jvalue.get_##ResultType(); \
1620 return ret;\
1621 JNI_END
1622
1623 // the runtime type of subword integral basic types is integer
1624 DEFINE_CALLNONVIRTUALMETHOD(jboolean, Boolean, T_BOOLEAN
1625 , HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1626 HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHOD_RETURN(_ret_ref))
1627 DEFINE_CALLNONVIRTUALMETHOD(jbyte, Byte, T_BYTE
1628 , HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1629 HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHOD_RETURN(_ret_ref))
1630 DEFINE_CALLNONVIRTUALMETHOD(jchar, Char, T_CHAR
1631 , HOTSPOT_JNI_CALLNONVIRTUALCHARMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1632 HOTSPOT_JNI_CALLNONVIRTUALCHARMETHOD_RETURN(_ret_ref))
1633 DEFINE_CALLNONVIRTUALMETHOD(jshort, Short, T_SHORT
1634 , HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1635 HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHOD_RETURN(_ret_ref))
1636
1637 DEFINE_CALLNONVIRTUALMETHOD(jobject, Object, T_OBJECT
1638 , HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1639 HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHOD_RETURN(_ret_ref))
1640 DEFINE_CALLNONVIRTUALMETHOD(jint, Int, T_INT
1641 , HOTSPOT_JNI_CALLNONVIRTUALINTMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1642 HOTSPOT_JNI_CALLNONVIRTUALINTMETHOD_RETURN(_ret_ref))
1643 DEFINE_CALLNONVIRTUALMETHOD(jlong, Long, T_LONG
1644 , HOTSPOT_JNI_CALLNONVIRTUALLONGMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1645 // Float and double probes don't return value because dtrace doesn't currently support it
1646 HOTSPOT_JNI_CALLNONVIRTUALLONGMETHOD_RETURN(_ret_ref))
1647 DEFINE_CALLNONVIRTUALMETHOD(jfloat, Float, T_FLOAT
1648 , HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1649 HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHOD_RETURN())
1650 DEFINE_CALLNONVIRTUALMETHOD(jdouble, Double, T_DOUBLE
1651 , HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1652 HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHOD_RETURN())
1653
1654 #define DEFINE_CALLNONVIRTUALMETHODV(ResultType, Result, Tag \
1655 , EntryProbe, ReturnProbe) \
1656 \
1657 DT_RETURN_MARK_DECL_FOR(Result, CallNonvirtual##Result##MethodV, ResultType \
1658 , ReturnProbe);\
1659 \
1660 JNI_ENTRY(ResultType, \
1661 jni_CallNonvirtual##Result##MethodV(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, va_list args)) \
1662 JNIWrapper("CallNonvitual" XSTR(Result) "MethodV"); \
1663 \
1664 EntryProbe;\
1665 ResultType ret;\
1666 DT_RETURN_MARK_FOR(Result, CallNonvirtual##Result##MethodV, ResultType, \
1667 (const ResultType&)ret);\
1668 \
1669 JavaValue jvalue(Tag); \
1670 JNI_ArgumentPusherVaArg ap(methodID, args); \
1671 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_0); \
1672 ret = jvalue.get_##ResultType(); \
1673 return ret;\
1674 JNI_END
1675
1676 // the runtime type of subword integral basic types is integer
1677 DEFINE_CALLNONVIRTUALMETHODV(jboolean, Boolean, T_BOOLEAN
1678 , HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1679 HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHODV_RETURN(_ret_ref))
1680 DEFINE_CALLNONVIRTUALMETHODV(jbyte, Byte, T_BYTE
1681 , HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1682 HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHODV_RETURN(_ret_ref))
1683 DEFINE_CALLNONVIRTUALMETHODV(jchar, Char, T_CHAR
1684 , HOTSPOT_JNI_CALLNONVIRTUALCHARMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1685 HOTSPOT_JNI_CALLNONVIRTUALCHARMETHODV_RETURN(_ret_ref))
1686 DEFINE_CALLNONVIRTUALMETHODV(jshort, Short, T_SHORT
1687 , HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1688 HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHODV_RETURN(_ret_ref))
1689
1690 DEFINE_CALLNONVIRTUALMETHODV(jobject, Object, T_OBJECT
1691 , HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1692 HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHODV_RETURN(_ret_ref))
1693 DEFINE_CALLNONVIRTUALMETHODV(jint, Int, T_INT
1694 , HOTSPOT_JNI_CALLNONVIRTUALINTMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1695 HOTSPOT_JNI_CALLNONVIRTUALINTMETHODV_RETURN(_ret_ref))
1696 DEFINE_CALLNONVIRTUALMETHODV(jlong, Long, T_LONG
1697 , HOTSPOT_JNI_CALLNONVIRTUALLONGMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1698 // Float and double probes don't return value because dtrace doesn't currently support it
1699 HOTSPOT_JNI_CALLNONVIRTUALLONGMETHODV_RETURN(_ret_ref))
1700 DEFINE_CALLNONVIRTUALMETHODV(jfloat, Float, T_FLOAT
1701 , HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1702 HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHODV_RETURN())
1703 DEFINE_CALLNONVIRTUALMETHODV(jdouble, Double, T_DOUBLE
1704 , HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1705 HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHODV_RETURN())
1706
1707 #define DEFINE_CALLNONVIRTUALMETHODA(ResultType, Result, Tag \
1708 , EntryProbe, ReturnProbe) \
1709 \
1710 DT_RETURN_MARK_DECL_FOR(Result, CallNonvirtual##Result##MethodA, ResultType \
1711 , ReturnProbe);\
1712 \
1713 JNI_ENTRY(ResultType, \
1714 jni_CallNonvirtual##Result##MethodA(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, const jvalue *args)) \
1715 JNIWrapper("CallNonvitual" XSTR(Result) "MethodA"); \
1716 \
1717 EntryProbe;\
1718 ResultType ret;\
1719 DT_RETURN_MARK_FOR(Result, CallNonvirtual##Result##MethodA, ResultType, \
1720 (const ResultType&)ret);\
1721 \
1722 JavaValue jvalue(Tag); \
1723 JNI_ArgumentPusherArray ap(methodID, args); \
1724 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_0); \
1725 ret = jvalue.get_##ResultType(); \
1726 return ret;\
1727 JNI_END
1728
1729 // the runtime type of subword integral basic types is integer
1730 DEFINE_CALLNONVIRTUALMETHODA(jboolean, Boolean, T_BOOLEAN
1731 , HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1732 HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHODA_RETURN(_ret_ref))
1733 DEFINE_CALLNONVIRTUALMETHODA(jbyte, Byte, T_BYTE
1734 , HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1735 HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHODA_RETURN(_ret_ref))
1736 DEFINE_CALLNONVIRTUALMETHODA(jchar, Char, T_CHAR
1737 , HOTSPOT_JNI_CALLNONVIRTUALCHARMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1738 HOTSPOT_JNI_CALLNONVIRTUALCHARMETHODA_RETURN(_ret_ref))
1739 DEFINE_CALLNONVIRTUALMETHODA(jshort, Short, T_SHORT
1740 , HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1741 HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHODA_RETURN(_ret_ref))
1742
1743 DEFINE_CALLNONVIRTUALMETHODA(jobject, Object, T_OBJECT
1744 , HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1745 HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHODA_RETURN(_ret_ref))
1746 DEFINE_CALLNONVIRTUALMETHODA(jint, Int, T_INT
1747 , HOTSPOT_JNI_CALLNONVIRTUALINTMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1748 HOTSPOT_JNI_CALLNONVIRTUALINTMETHODA_RETURN(_ret_ref))
1749 DEFINE_CALLNONVIRTUALMETHODA(jlong, Long, T_LONG
1750 , HOTSPOT_JNI_CALLNONVIRTUALLONGMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1751 // Float and double probes don't return value because dtrace doesn't currently support it
1752 HOTSPOT_JNI_CALLNONVIRTUALLONGMETHODA_RETURN(_ret_ref))
1753 DEFINE_CALLNONVIRTUALMETHODA(jfloat, Float, T_FLOAT
1754 , HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1755 HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHODA_RETURN())
1756 DEFINE_CALLNONVIRTUALMETHODA(jdouble, Double, T_DOUBLE
1757 , HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1758 HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHODA_RETURN())
1759
1760 DT_VOID_RETURN_MARK_DECL(CallNonvirtualVoidMethod
1761 , HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHOD_RETURN());
1762 DT_VOID_RETURN_MARK_DECL(CallNonvirtualVoidMethodV
1763 , HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHODV_RETURN());
1764 DT_VOID_RETURN_MARK_DECL(CallNonvirtualVoidMethodA
1765 , HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHODA_RETURN());
1766
1767 JNI_ENTRY(void, jni_CallNonvirtualVoidMethod(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, ...))
1768 JNIWrapper("CallNonvirtualVoidMethod");
1769
1770 HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHOD_ENTRY(env, obj, cls, (uintptr_t) methodID);
1771 DT_VOID_RETURN_MARK(CallNonvirtualVoidMethod);
1772
1773 va_list args;
1774 va_start(args, methodID);
1775 JavaValue jvalue(T_VOID);
1776 JNI_ArgumentPusherVaArg ap(methodID, args);
1777 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK);
1778 va_end(args);
1779 JNI_END
1780
1781
1782 JNI_ENTRY(void, jni_CallNonvirtualVoidMethodV(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, va_list args))
1783 JNIWrapper("CallNonvirtualVoidMethodV");
1784
1785 HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHODV_ENTRY(
1786 env, obj, cls, (uintptr_t) methodID);
1787 DT_VOID_RETURN_MARK(CallNonvirtualVoidMethodV);
1788
1789 JavaValue jvalue(T_VOID);
1790 JNI_ArgumentPusherVaArg ap(methodID, args);
1791 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK);
1792 JNI_END
1793
1794
1795 JNI_ENTRY(void, jni_CallNonvirtualVoidMethodA(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, const jvalue *args))
1796 JNIWrapper("CallNonvirtualVoidMethodA");
1797 HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHODA_ENTRY(
1798 env, obj, cls, (uintptr_t) methodID);
1799 DT_VOID_RETURN_MARK(CallNonvirtualVoidMethodA);
1800 JavaValue jvalue(T_VOID);
1801 JNI_ArgumentPusherArray ap(methodID, args);
1802 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK);
1803 JNI_END
1804
1805
1806
1807 #define DEFINE_CALLSTATICMETHOD(ResultType, Result, Tag \
1808 , EntryProbe, ResultProbe) \
1809 \
1810 DT_RETURN_MARK_DECL_FOR(Result, CallStatic##Result##Method, ResultType \
1811 , ResultProbe); \
1812 \
1813 JNI_ENTRY(ResultType, \
1814 jni_CallStatic##Result##Method(JNIEnv *env, jclass cls, jmethodID methodID, ...)) \
1815 JNIWrapper("CallStatic" XSTR(Result) "Method"); \
1816 \
1817 EntryProbe; \
1818 ResultType ret = 0;\
1819 DT_RETURN_MARK_FOR(Result, CallStatic##Result##Method, ResultType, \
1820 (const ResultType&)ret);\
1821 \
1822 va_list args; \
1823 va_start(args, methodID); \
1824 JavaValue jvalue(Tag); \
1825 JNI_ArgumentPusherVaArg ap(methodID, args); \
1826 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK_0); \
1827 va_end(args); \
1828 ret = jvalue.get_##ResultType(); \
1829 return ret;\
1830 JNI_END
1831
1832 // the runtime type of subword integral basic types is integer
1833 DEFINE_CALLSTATICMETHOD(jboolean, Boolean, T_BOOLEAN
1834 , HOTSPOT_JNI_CALLSTATICBOOLEANMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1835 HOTSPOT_JNI_CALLSTATICBOOLEANMETHOD_RETURN(_ret_ref));
1836 DEFINE_CALLSTATICMETHOD(jbyte, Byte, T_BYTE
1837 , HOTSPOT_JNI_CALLSTATICBYTEMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1838 HOTSPOT_JNI_CALLSTATICBYTEMETHOD_RETURN(_ret_ref));
1839 DEFINE_CALLSTATICMETHOD(jchar, Char, T_CHAR
1840 , HOTSPOT_JNI_CALLSTATICCHARMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1841 HOTSPOT_JNI_CALLSTATICCHARMETHOD_RETURN(_ret_ref));
1842 DEFINE_CALLSTATICMETHOD(jshort, Short, T_SHORT
1843 , HOTSPOT_JNI_CALLSTATICSHORTMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1844 HOTSPOT_JNI_CALLSTATICSHORTMETHOD_RETURN(_ret_ref));
1845
1846 DEFINE_CALLSTATICMETHOD(jobject, Object, T_OBJECT
1847 , HOTSPOT_JNI_CALLSTATICOBJECTMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1848 HOTSPOT_JNI_CALLSTATICOBJECTMETHOD_RETURN(_ret_ref));
1849 DEFINE_CALLSTATICMETHOD(jint, Int, T_INT
1850 , HOTSPOT_JNI_CALLSTATICINTMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1851 HOTSPOT_JNI_CALLSTATICINTMETHOD_RETURN(_ret_ref));
1852 DEFINE_CALLSTATICMETHOD(jlong, Long, T_LONG
1853 , HOTSPOT_JNI_CALLSTATICLONGMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1854 HOTSPOT_JNI_CALLSTATICLONGMETHOD_RETURN(_ret_ref));
1855 // Float and double probes don't return value because dtrace doesn't currently support it
1856 DEFINE_CALLSTATICMETHOD(jfloat, Float, T_FLOAT
1857 , HOTSPOT_JNI_CALLSTATICFLOATMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1858 HOTSPOT_JNI_CALLSTATICFLOATMETHOD_RETURN());
1859 DEFINE_CALLSTATICMETHOD(jdouble, Double, T_DOUBLE
1860 , HOTSPOT_JNI_CALLSTATICDOUBLEMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1861 HOTSPOT_JNI_CALLSTATICDOUBLEMETHOD_RETURN());
1862
1863 #define DEFINE_CALLSTATICMETHODV(ResultType, Result, Tag \
1864 , EntryProbe, ResultProbe) \
1865 \
1866 DT_RETURN_MARK_DECL_FOR(Result, CallStatic##Result##MethodV, ResultType \
1867 , ResultProbe); \
1868 \
1869 JNI_ENTRY(ResultType, \
1870 jni_CallStatic##Result##MethodV(JNIEnv *env, jclass cls, jmethodID methodID, va_list args)) \
1871 JNIWrapper("CallStatic" XSTR(Result) "MethodV"); \
1872 \
1873 EntryProbe; \
1874 ResultType ret = 0;\
1875 DT_RETURN_MARK_FOR(Result, CallStatic##Result##MethodV, ResultType, \
1876 (const ResultType&)ret);\
1877 \
1878 JavaValue jvalue(Tag); \
1879 JNI_ArgumentPusherVaArg ap(methodID, args); \
1880 /* Make sure class is initialized before trying to invoke its method */ \
1881 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); \
1882 k->initialize(CHECK_0); \
1883 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK_0); \
1884 va_end(args); \
1885 ret = jvalue.get_##ResultType(); \
1886 return ret;\
1887 JNI_END
1888
1889 // the runtime type of subword integral basic types is integer
1890 DEFINE_CALLSTATICMETHODV(jboolean, Boolean, T_BOOLEAN
1891 , HOTSPOT_JNI_CALLSTATICBOOLEANMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1892 HOTSPOT_JNI_CALLSTATICBOOLEANMETHODV_RETURN(_ret_ref));
1893 DEFINE_CALLSTATICMETHODV(jbyte, Byte, T_BYTE
1894 , HOTSPOT_JNI_CALLSTATICBYTEMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1895 HOTSPOT_JNI_CALLSTATICBYTEMETHODV_RETURN(_ret_ref));
1896 DEFINE_CALLSTATICMETHODV(jchar, Char, T_CHAR
1897 , HOTSPOT_JNI_CALLSTATICCHARMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1898 HOTSPOT_JNI_CALLSTATICCHARMETHODV_RETURN(_ret_ref));
1899 DEFINE_CALLSTATICMETHODV(jshort, Short, T_SHORT
1900 , HOTSPOT_JNI_CALLSTATICSHORTMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1901 HOTSPOT_JNI_CALLSTATICSHORTMETHODV_RETURN(_ret_ref));
1902
1903 DEFINE_CALLSTATICMETHODV(jobject, Object, T_OBJECT
1904 , HOTSPOT_JNI_CALLSTATICOBJECTMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1905 HOTSPOT_JNI_CALLSTATICOBJECTMETHODV_RETURN(_ret_ref));
1906 DEFINE_CALLSTATICMETHODV(jint, Int, T_INT
1907 , HOTSPOT_JNI_CALLSTATICINTMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1908 HOTSPOT_JNI_CALLSTATICINTMETHODV_RETURN(_ret_ref));
1909 DEFINE_CALLSTATICMETHODV(jlong, Long, T_LONG
1910 , HOTSPOT_JNI_CALLSTATICLONGMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1911 HOTSPOT_JNI_CALLSTATICLONGMETHODV_RETURN(_ret_ref));
1912 // Float and double probes don't return value because dtrace doesn't currently support it
1913 DEFINE_CALLSTATICMETHODV(jfloat, Float, T_FLOAT
1914 , HOTSPOT_JNI_CALLSTATICFLOATMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1915 HOTSPOT_JNI_CALLSTATICFLOATMETHODV_RETURN());
1916 DEFINE_CALLSTATICMETHODV(jdouble, Double, T_DOUBLE
1917 , HOTSPOT_JNI_CALLSTATICDOUBLEMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1918 HOTSPOT_JNI_CALLSTATICDOUBLEMETHODV_RETURN());
1919
1920 #define DEFINE_CALLSTATICMETHODA(ResultType, Result, Tag \
1921 , EntryProbe, ResultProbe) \
1922 \
1923 DT_RETURN_MARK_DECL_FOR(Result, CallStatic##Result##MethodA, ResultType \
1924 , ResultProbe); \
1925 \
1926 JNI_ENTRY(ResultType, \
1927 jni_CallStatic##Result##MethodA(JNIEnv *env, jclass cls, jmethodID methodID, const jvalue *args)) \
1928 JNIWrapper("CallStatic" XSTR(Result) "MethodA"); \
1929 \
1930 EntryProbe; \
1931 ResultType ret = 0;\
1932 DT_RETURN_MARK_FOR(Result, CallStatic##Result##MethodA, ResultType, \
1933 (const ResultType&)ret);\
1934 \
1935 JavaValue jvalue(Tag); \
1936 JNI_ArgumentPusherArray ap(methodID, args); \
1937 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK_0); \
1938 ret = jvalue.get_##ResultType(); \
1939 return ret;\
1940 JNI_END
1941
1942 // the runtime type of subword integral basic types is integer
1943 DEFINE_CALLSTATICMETHODA(jboolean, Boolean, T_BOOLEAN
1944 , HOTSPOT_JNI_CALLSTATICBOOLEANMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1945 HOTSPOT_JNI_CALLSTATICBOOLEANMETHODA_RETURN(_ret_ref));
1946 DEFINE_CALLSTATICMETHODA(jbyte, Byte, T_BYTE
1947 , HOTSPOT_JNI_CALLSTATICBYTEMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1948 HOTSPOT_JNI_CALLSTATICBYTEMETHODA_RETURN(_ret_ref));
1949 DEFINE_CALLSTATICMETHODA(jchar, Char, T_CHAR
1950 , HOTSPOT_JNI_CALLSTATICCHARMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1951 HOTSPOT_JNI_CALLSTATICCHARMETHODA_RETURN(_ret_ref));
1952 DEFINE_CALLSTATICMETHODA(jshort, Short, T_SHORT
1953 , HOTSPOT_JNI_CALLSTATICSHORTMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1954 HOTSPOT_JNI_CALLSTATICSHORTMETHODA_RETURN(_ret_ref));
1955
1956 DEFINE_CALLSTATICMETHODA(jobject, Object, T_OBJECT
1957 , HOTSPOT_JNI_CALLSTATICOBJECTMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1958 HOTSPOT_JNI_CALLSTATICOBJECTMETHODA_RETURN(_ret_ref));
1959 DEFINE_CALLSTATICMETHODA(jint, Int, T_INT
1960 , HOTSPOT_JNI_CALLSTATICINTMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1961 HOTSPOT_JNI_CALLSTATICINTMETHODA_RETURN(_ret_ref));
1962 DEFINE_CALLSTATICMETHODA(jlong, Long, T_LONG
1963 , HOTSPOT_JNI_CALLSTATICLONGMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1964 HOTSPOT_JNI_CALLSTATICLONGMETHODA_RETURN(_ret_ref));
1965 // Float and double probes don't return value because dtrace doesn't currently support it
1966 DEFINE_CALLSTATICMETHODA(jfloat, Float, T_FLOAT
1967 , HOTSPOT_JNI_CALLSTATICFLOATMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1968 HOTSPOT_JNI_CALLSTATICFLOATMETHODA_RETURN());
1969 DEFINE_CALLSTATICMETHODA(jdouble, Double, T_DOUBLE
1970 , HOTSPOT_JNI_CALLSTATICDOUBLEMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1971 HOTSPOT_JNI_CALLSTATICDOUBLEMETHODA_RETURN());
1972
1973 DT_VOID_RETURN_MARK_DECL(CallStaticVoidMethod
1974 , HOTSPOT_JNI_CALLSTATICVOIDMETHOD_RETURN());
1975 DT_VOID_RETURN_MARK_DECL(CallStaticVoidMethodV
1976 , HOTSPOT_JNI_CALLSTATICVOIDMETHODV_RETURN());
1977 DT_VOID_RETURN_MARK_DECL(CallStaticVoidMethodA
1978 , HOTSPOT_JNI_CALLSTATICVOIDMETHODA_RETURN());
1979
1980 JNI_ENTRY(void, jni_CallStaticVoidMethod(JNIEnv *env, jclass cls, jmethodID methodID, ...))
1981 JNIWrapper("CallStaticVoidMethod");
1982 HOTSPOT_JNI_CALLSTATICVOIDMETHOD_ENTRY(env, cls, (uintptr_t) methodID);
1983 DT_VOID_RETURN_MARK(CallStaticVoidMethod);
1984
1985 va_list args;
1986 va_start(args, methodID);
1987 JavaValue jvalue(T_VOID);
1988 JNI_ArgumentPusherVaArg ap(methodID, args);
1989 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK);
1990 va_end(args);
1991 JNI_END
1992
1993
1994 JNI_ENTRY(void, jni_CallStaticVoidMethodV(JNIEnv *env, jclass cls, jmethodID methodID, va_list args))
1995 JNIWrapper("CallStaticVoidMethodV");
1996 HOTSPOT_JNI_CALLSTATICVOIDMETHODV_ENTRY(env, cls, (uintptr_t) methodID);
1997 DT_VOID_RETURN_MARK(CallStaticVoidMethodV);
1998
1999 JavaValue jvalue(T_VOID);
2000 JNI_ArgumentPusherVaArg ap(methodID, args);
2001 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK);
2002 JNI_END
2003
2004
2005 JNI_ENTRY(void, jni_CallStaticVoidMethodA(JNIEnv *env, jclass cls, jmethodID methodID, const jvalue *args))
2006 JNIWrapper("CallStaticVoidMethodA");
2007 HOTSPOT_JNI_CALLSTATICVOIDMETHODA_ENTRY(env, cls, (uintptr_t) methodID);
2008 DT_VOID_RETURN_MARK(CallStaticVoidMethodA);
2009
2010 JavaValue jvalue(T_VOID);
2011 JNI_ArgumentPusherArray ap(methodID, args);
2012 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK);
2013 JNI_END
2014
2015
2016 //
2017 // Accessing Fields
2018 //
2019
2020
2021 DT_RETURN_MARK_DECL(GetFieldID, jfieldID
2022 , HOTSPOT_JNI_GETFIELDID_RETURN((uintptr_t)_ret_ref));
2023
2024 JNI_ENTRY(jfieldID, jni_GetFieldID(JNIEnv *env, jclass clazz,
2025 const char *name, const char *sig))
2026 JNIWrapper("GetFieldID");
2027 HOTSPOT_JNI_GETFIELDID_ENTRY(env, clazz, (char *) name, (char *) sig);
2028 jfieldID ret = 0;
2029 DT_RETURN_MARK(GetFieldID, jfieldID, (const jfieldID&)ret);
2030
2031 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz));
2032
2033 // The class should have been loaded (we have an instance of the class
2034 // passed in) so the field and signature should already be in the symbol
2035 // table. If they're not there, the field doesn't exist.
2036 TempNewSymbol fieldname = SymbolTable::probe(name, (int)strlen(name));
2037 TempNewSymbol signame = SymbolTable::probe(sig, (int)strlen(sig));
2038 if (fieldname == NULL || signame == NULL) {
2039 ResourceMark rm;
2040 THROW_MSG_0(vmSymbols::java_lang_NoSuchFieldError(), err_msg("%s.%s %s", k->external_name(), name, sig));
2041 }
2042
2043 // Make sure class is initialized before handing id's out to fields
2044 k->initialize(CHECK_NULL);
2045
2046 fieldDescriptor fd;
2047 if (!k->is_instance_klass() ||
2048 !InstanceKlass::cast(k)->find_field(fieldname, signame, false, &fd)) {
2049 ResourceMark rm;
2050 THROW_MSG_0(vmSymbols::java_lang_NoSuchFieldError(), err_msg("%s.%s %s", k->external_name(), name, sig));
2051 }
2052
2053 // A jfieldID for a non-static field is simply the offset of the field within the instanceOop
2054 // It may also have hash bits for k, if VerifyJNIFields is turned on.
2055 ret = jfieldIDWorkaround::to_instance_jfieldID(k, fd.offset(), fd.is_flattened());
2056 return ret;
2057 JNI_END
2058
2059
2060 JNI_ENTRY(jobject, jni_GetObjectField(JNIEnv *env, jobject obj, jfieldID fieldID))
2061 JNIWrapper("GetObjectField");
2062 HOTSPOT_JNI_GETOBJECTFIELD_ENTRY(env, obj, (uintptr_t) fieldID);
2063 oop o = JNIHandles::resolve_non_null(obj);
2064 Klass* k = o->klass();
2065 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID);
2066 oop res = NULL;
2067 // Keep JVMTI addition small and only check enabled flag here.
2068 // jni_GetField_probe() assumes that is okay to create handles.
2069 if (JvmtiExport::should_post_field_access()) {
2070 o = JvmtiExport::jni_GetField_probe(thread, obj, o, k, fieldID, false);
2071 }
2072 if (!jfieldIDWorkaround::is_flattened_field(fieldID)) {
2073 res = HeapAccess<ON_UNKNOWN_OOP_REF>::oop_load_at(o, offset);
2074 } else {
2075 assert(k->is_instance_klass(), "Only instance can have flattened fields");
2076 InstanceKlass* ik = InstanceKlass::cast(k);
2077 fieldDescriptor fd;
2078 ik->find_field_from_offset(offset, false, &fd);
2079 InstanceKlass* holder = fd.field_holder();
2080 ValueKlass* field_vklass = ValueKlass::cast(holder->get_value_field_klass(fd.index()));
2081 assert(field_vklass->is_initialized(), "Must be initialized at this point");
2082
2083 Handle obj_h(THREAD, o);
2084 if (field_vklass->is_empty_value()) {
2085 res = (instanceOop)field_vklass->default_value();
2086 } else {
2087 // allocate instance
2088 res = field_vklass->allocate_instance(CHECK_NULL);
2089 // copy value
2090 field_vklass->value_copy_payload_to_new_oop(((char*)(oopDesc*)obj_h()) + ik->field_offset(fd.index()), res);
2091 }
2092 }
2093 jobject ret = JNIHandles::make_local(env, res);
2094 HOTSPOT_JNI_GETOBJECTFIELD_RETURN(ret);
2095 return ret;
2096 JNI_END
2097
2098
2099
2100 #define DEFINE_GETFIELD(Return,Fieldname,Result \
2101 , EntryProbe, ReturnProbe) \
2102 \
2103 DT_RETURN_MARK_DECL_FOR(Result, Get##Result##Field, Return \
2104 , ReturnProbe); \
2105 \
2106 JNI_ENTRY_NO_PRESERVE(Return, jni_Get##Result##Field(JNIEnv *env, jobject obj, jfieldID fieldID)) \
2107 JNIWrapper("Get" XSTR(Result) "Field"); \
2108 \
2109 EntryProbe; \
2110 Return ret = 0;\
2111 DT_RETURN_MARK_FOR(Result, Get##Result##Field, Return, (const Return&)ret);\
2112 \
2113 oop o = JNIHandles::resolve_non_null(obj); \
2114 Klass* k = o->klass(); \
2115 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID); \
2116 /* Keep JVMTI addition small and only check enabled flag here. */ \
2117 /* jni_GetField_probe_nh() assumes that is not okay to create handles */ \
2118 /* and creates a ResetNoHandleMark. */ \
2119 if (JvmtiExport::should_post_field_access()) { \
2120 o = JvmtiExport::jni_GetField_probe_nh(thread, obj, o, k, fieldID, false); \
2121 } \
2122 ret = o->Fieldname##_field(offset); \
2123 return ret; \
2124 JNI_END
2125
2126 DEFINE_GETFIELD(jboolean, bool, Boolean
2127 , HOTSPOT_JNI_GETBOOLEANFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2128 HOTSPOT_JNI_GETBOOLEANFIELD_RETURN(_ret_ref))
2129 DEFINE_GETFIELD(jbyte, byte, Byte
2130 , HOTSPOT_JNI_GETBYTEFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2131 HOTSPOT_JNI_GETBYTEFIELD_RETURN(_ret_ref))
2132 DEFINE_GETFIELD(jchar, char, Char
2133 , HOTSPOT_JNI_GETCHARFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2134 HOTSPOT_JNI_GETCHARFIELD_RETURN(_ret_ref))
2135 DEFINE_GETFIELD(jshort, short, Short
2136 , HOTSPOT_JNI_GETSHORTFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2137 HOTSPOT_JNI_GETSHORTFIELD_RETURN(_ret_ref))
2138 DEFINE_GETFIELD(jint, int, Int
2139 , HOTSPOT_JNI_GETINTFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2140 HOTSPOT_JNI_GETINTFIELD_RETURN(_ret_ref))
2141 DEFINE_GETFIELD(jlong, long, Long
2142 , HOTSPOT_JNI_GETLONGFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2143 HOTSPOT_JNI_GETLONGFIELD_RETURN(_ret_ref))
2144 // Float and double probes don't return value because dtrace doesn't currently support it
2145 DEFINE_GETFIELD(jfloat, float, Float
2146 , HOTSPOT_JNI_GETFLOATFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2147 HOTSPOT_JNI_GETFLOATFIELD_RETURN())
2148 DEFINE_GETFIELD(jdouble, double, Double
2149 , HOTSPOT_JNI_GETDOUBLEFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2150 HOTSPOT_JNI_GETDOUBLEFIELD_RETURN())
2151
2152 address jni_GetBooleanField_addr() {
2153 return (address)jni_GetBooleanField;
2154 }
2155 address jni_GetByteField_addr() {
2156 return (address)jni_GetByteField;
2157 }
2158 address jni_GetCharField_addr() {
2159 return (address)jni_GetCharField;
2160 }
2161 address jni_GetShortField_addr() {
2162 return (address)jni_GetShortField;
2163 }
2164 address jni_GetIntField_addr() {
2165 return (address)jni_GetIntField;
2166 }
2167 address jni_GetLongField_addr() {
2168 return (address)jni_GetLongField;
2169 }
2170 address jni_GetFloatField_addr() {
2171 return (address)jni_GetFloatField;
2172 }
2173 address jni_GetDoubleField_addr() {
2174 return (address)jni_GetDoubleField;
2175 }
2176
2177 JNI_ENTRY_NO_PRESERVE(void, jni_SetObjectField(JNIEnv *env, jobject obj, jfieldID fieldID, jobject value))
2178 JNIWrapper("SetObjectField");
2179 HOTSPOT_JNI_SETOBJECTFIELD_ENTRY(env, obj, (uintptr_t) fieldID, value);
2180 oop o = JNIHandles::resolve_non_null(obj);
2181 Klass* k = o->klass();
2182 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID);
2183 // Keep JVMTI addition small and only check enabled flag here.
2184 // jni_SetField_probe_nh() assumes that is not okay to create handles
2185 // and creates a ResetNoHandleMark.
2186 if (JvmtiExport::should_post_field_modification()) {
2187 jvalue field_value;
2188 field_value.l = value;
2189 o = JvmtiExport::jni_SetField_probe_nh(thread, obj, o, k, fieldID, false, 'L', (jvalue *)&field_value);
2190 }
2191 if (!jfieldIDWorkaround::is_flattened_field(fieldID)) {
2192 HeapAccess<ON_UNKNOWN_OOP_REF>::oop_store_at(o, offset, JNIHandles::resolve(value));
2193 } else {
2194 assert(k->is_instance_klass(), "Only instances can have flattened fields");
2195 InstanceKlass* ik = InstanceKlass::cast(k);
2196 fieldDescriptor fd;
2197 ik->find_field_from_offset(offset, false, &fd);
2198 InstanceKlass* holder = fd.field_holder();
2199 ValueKlass* vklass = ValueKlass::cast(holder->get_value_field_klass(fd.index()));
2200 oop v = JNIHandles::resolve_non_null(value);
2201 vklass->value_copy_oop_to_payload(v, ((char*)(oopDesc*)o) + offset);
2202 }
2203 HOTSPOT_JNI_SETOBJECTFIELD_RETURN();
2204 JNI_END
2205
2206
2207 #define DEFINE_SETFIELD(Argument,Fieldname,Result,SigType,unionType \
2208 , EntryProbe, ReturnProbe) \
2209 \
2210 JNI_ENTRY_NO_PRESERVE(void, jni_Set##Result##Field(JNIEnv *env, jobject obj, jfieldID fieldID, Argument value)) \
2211 JNIWrapper("Set" XSTR(Result) "Field"); \
2212 \
2213 EntryProbe; \
2214 \
2215 oop o = JNIHandles::resolve_non_null(obj); \
2216 Klass* k = o->klass(); \
2217 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID); \
2218 /* Keep JVMTI addition small and only check enabled flag here. */ \
2219 /* jni_SetField_probe_nh() assumes that is not okay to create handles */ \
2220 /* and creates a ResetNoHandleMark. */ \
2221 if (JvmtiExport::should_post_field_modification()) { \
2222 jvalue field_value; \
2223 field_value.unionType = value; \
2224 o = JvmtiExport::jni_SetField_probe_nh(thread, obj, o, k, fieldID, false, SigType, (jvalue *)&field_value); \
2225 } \
2226 if (SigType == 'Z') { value = ((jboolean)value) & 1; } \
2227 o->Fieldname##_field_put(offset, value); \
2228 ReturnProbe; \
2229 JNI_END
2230
2231 DEFINE_SETFIELD(jboolean, bool, Boolean, 'Z', z
2232 , HOTSPOT_JNI_SETBOOLEANFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value),
2233 HOTSPOT_JNI_SETBOOLEANFIELD_RETURN())
2234 DEFINE_SETFIELD(jbyte, byte, Byte, 'B', b
2235 , HOTSPOT_JNI_SETBYTEFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value),
2236 HOTSPOT_JNI_SETBYTEFIELD_RETURN())
2237 DEFINE_SETFIELD(jchar, char, Char, 'C', c
2238 , HOTSPOT_JNI_SETCHARFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value),
2239 HOTSPOT_JNI_SETCHARFIELD_RETURN())
2240 DEFINE_SETFIELD(jshort, short, Short, 'S', s
2241 , HOTSPOT_JNI_SETSHORTFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value),
2242 HOTSPOT_JNI_SETSHORTFIELD_RETURN())
2243 DEFINE_SETFIELD(jint, int, Int, 'I', i
2244 , HOTSPOT_JNI_SETINTFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value),
2245 HOTSPOT_JNI_SETINTFIELD_RETURN())
2246 DEFINE_SETFIELD(jlong, long, Long, 'J', j
2247 , HOTSPOT_JNI_SETLONGFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value),
2248 HOTSPOT_JNI_SETLONGFIELD_RETURN())
2249 // Float and double probes don't return value because dtrace doesn't currently support it
2250 DEFINE_SETFIELD(jfloat, float, Float, 'F', f
2251 , HOTSPOT_JNI_SETFLOATFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2252 HOTSPOT_JNI_SETFLOATFIELD_RETURN())
2253 DEFINE_SETFIELD(jdouble, double, Double, 'D', d
2254 , HOTSPOT_JNI_SETDOUBLEFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2255 HOTSPOT_JNI_SETDOUBLEFIELD_RETURN())
2256
2257 DT_RETURN_MARK_DECL(ToReflectedField, jobject
2258 , HOTSPOT_JNI_TOREFLECTEDFIELD_RETURN(_ret_ref));
2259
2260 JNI_ENTRY(jobject, jni_ToReflectedField(JNIEnv *env, jclass cls, jfieldID fieldID, jboolean isStatic))
2261 JNIWrapper("ToReflectedField");
2262 HOTSPOT_JNI_TOREFLECTEDFIELD_ENTRY(env, cls, (uintptr_t) fieldID, isStatic);
2263 jobject ret = NULL;
2264 DT_RETURN_MARK(ToReflectedField, jobject, (const jobject&)ret);
2265
2266 fieldDescriptor fd;
2267 bool found = false;
2268 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2269
2270 assert(jfieldIDWorkaround::is_static_jfieldID(fieldID) == (isStatic != 0), "invalid fieldID");
2271
2272 if (isStatic) {
2273 // Static field. The fieldID a JNIid specifying the field holder and the offset within the Klass*.
2274 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID);
2275 assert(id->is_static_field_id(), "invalid static field id");
2276 found = id->find_local_field(&fd);
2277 } else {
2278 // Non-static field. The fieldID is really the offset of the field within the instanceOop.
2279 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID);
2280 found = InstanceKlass::cast(k)->find_field_from_offset(offset, false, &fd);
2281 }
2282 assert(found, "bad fieldID passed into jni_ToReflectedField");
2283 oop reflected = Reflection::new_field(&fd, CHECK_NULL);
2284 ret = JNIHandles::make_local(env, reflected);
2285 return ret;
2286 JNI_END
2287
2288
2289 //
2290 // Accessing Static Fields
2291 //
2292 DT_RETURN_MARK_DECL(GetStaticFieldID, jfieldID
2293 , HOTSPOT_JNI_GETSTATICFIELDID_RETURN((uintptr_t)_ret_ref));
2294
2295 JNI_ENTRY(jfieldID, jni_GetStaticFieldID(JNIEnv *env, jclass clazz,
2296 const char *name, const char *sig))
2297 JNIWrapper("GetStaticFieldID");
2298 HOTSPOT_JNI_GETSTATICFIELDID_ENTRY(env, clazz, (char *) name, (char *) sig);
2299 jfieldID ret = NULL;
2300 DT_RETURN_MARK(GetStaticFieldID, jfieldID, (const jfieldID&)ret);
2301
2302 // The class should have been loaded (we have an instance of the class
2303 // passed in) so the field and signature should already be in the symbol
2304 // table. If they're not there, the field doesn't exist.
2305 TempNewSymbol fieldname = SymbolTable::probe(name, (int)strlen(name));
2306 TempNewSymbol signame = SymbolTable::probe(sig, (int)strlen(sig));
2307 if (fieldname == NULL || signame == NULL) {
2308 THROW_MSG_0(vmSymbols::java_lang_NoSuchFieldError(), (char*) name);
2309 }
2310 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz));
2311 // Make sure class is initialized before handing id's out to static fields
2312 k->initialize(CHECK_NULL);
2313
2314 fieldDescriptor fd;
2315 if (!k->is_instance_klass() ||
2316 !InstanceKlass::cast(k)->find_field(fieldname, signame, true, &fd)) {
2317 THROW_MSG_0(vmSymbols::java_lang_NoSuchFieldError(), (char*) name);
2318 }
2319
2320 // A jfieldID for a static field is a JNIid specifying the field holder and the offset within the Klass*
2321 JNIid* id = fd.field_holder()->jni_id_for(fd.offset());
2322 debug_only(id->set_is_static_field_id();)
2323
2324 debug_only(id->verify(fd.field_holder()));
2325
2326 ret = jfieldIDWorkaround::to_static_jfieldID(id);
2327 return ret;
2328 JNI_END
2329
2330
2331 JNI_ENTRY(jobject, jni_GetStaticObjectField(JNIEnv *env, jclass clazz, jfieldID fieldID))
2332 JNIWrapper("GetStaticObjectField");
2333 HOTSPOT_JNI_GETSTATICOBJECTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID);
2334 #if INCLUDE_JNI_CHECK
2335 DEBUG_ONLY(Klass* param_k = jniCheck::validate_class(thread, clazz);)
2336 #endif // INCLUDE_JNI_CHECK
2337 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID);
2338 assert(id->is_static_field_id(), "invalid static field id");
2339 // Keep JVMTI addition small and only check enabled flag here.
2340 // jni_GetField_probe() assumes that is okay to create handles.
2341 if (JvmtiExport::should_post_field_access()) {
2342 JvmtiExport::jni_GetField_probe(thread, NULL, NULL, id->holder(), fieldID, true);
2343 }
2344 jobject ret = JNIHandles::make_local(id->holder()->java_mirror()->obj_field(id->offset()));
2345 HOTSPOT_JNI_GETSTATICOBJECTFIELD_RETURN(ret);
2346 return ret;
2347 JNI_END
2348
2349
2350 #define DEFINE_GETSTATICFIELD(Return,Fieldname,Result \
2351 , EntryProbe, ReturnProbe) \
2352 \
2353 DT_RETURN_MARK_DECL_FOR(Result, GetStatic##Result##Field, Return \
2354 , ReturnProbe); \
2355 \
2356 JNI_ENTRY(Return, jni_GetStatic##Result##Field(JNIEnv *env, jclass clazz, jfieldID fieldID)) \
2357 JNIWrapper("GetStatic" XSTR(Result) "Field"); \
2358 EntryProbe; \
2359 Return ret = 0;\
2360 DT_RETURN_MARK_FOR(Result, GetStatic##Result##Field, Return, \
2361 (const Return&)ret);\
2362 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID); \
2363 assert(id->is_static_field_id(), "invalid static field id"); \
2364 /* Keep JVMTI addition small and only check enabled flag here. */ \
2365 /* jni_GetField_probe() assumes that is okay to create handles. */ \
2366 if (JvmtiExport::should_post_field_access()) { \
2367 JvmtiExport::jni_GetField_probe(thread, NULL, NULL, id->holder(), fieldID, true); \
2368 } \
2369 ret = id->holder()->java_mirror()-> Fieldname##_field (id->offset()); \
2370 return ret;\
2371 JNI_END
2372
2373 DEFINE_GETSTATICFIELD(jboolean, bool, Boolean
2374 , HOTSPOT_JNI_GETSTATICBOOLEANFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICBOOLEANFIELD_RETURN(_ret_ref))
2375 DEFINE_GETSTATICFIELD(jbyte, byte, Byte
2376 , HOTSPOT_JNI_GETSTATICBYTEFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICBYTEFIELD_RETURN(_ret_ref) )
2377 DEFINE_GETSTATICFIELD(jchar, char, Char
2378 , HOTSPOT_JNI_GETSTATICCHARFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICCHARFIELD_RETURN(_ret_ref) )
2379 DEFINE_GETSTATICFIELD(jshort, short, Short
2380 , HOTSPOT_JNI_GETSTATICSHORTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICSHORTFIELD_RETURN(_ret_ref) )
2381 DEFINE_GETSTATICFIELD(jint, int, Int
2382 , HOTSPOT_JNI_GETSTATICINTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICINTFIELD_RETURN(_ret_ref) )
2383 DEFINE_GETSTATICFIELD(jlong, long, Long
2384 , HOTSPOT_JNI_GETSTATICLONGFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICLONGFIELD_RETURN(_ret_ref) )
2385 // Float and double probes don't return value because dtrace doesn't currently support it
2386 DEFINE_GETSTATICFIELD(jfloat, float, Float
2387 , HOTSPOT_JNI_GETSTATICFLOATFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICFLOATFIELD_RETURN() )
2388 DEFINE_GETSTATICFIELD(jdouble, double, Double
2389 , HOTSPOT_JNI_GETSTATICDOUBLEFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICDOUBLEFIELD_RETURN() )
2390
2391 JNI_ENTRY(void, jni_SetStaticObjectField(JNIEnv *env, jclass clazz, jfieldID fieldID, jobject value))
2392 JNIWrapper("SetStaticObjectField");
2393 HOTSPOT_JNI_SETSTATICOBJECTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value);
2394 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID);
2395 assert(id->is_static_field_id(), "invalid static field id");
2396 // Keep JVMTI addition small and only check enabled flag here.
2397 // jni_SetField_probe() assumes that is okay to create handles.
2398 if (JvmtiExport::should_post_field_modification()) {
2399 jvalue field_value;
2400 field_value.l = value;
2401 JvmtiExport::jni_SetField_probe(thread, NULL, NULL, id->holder(), fieldID, true, 'L', (jvalue *)&field_value);
2402 }
2403 id->holder()->java_mirror()->obj_field_put(id->offset(), JNIHandles::resolve(value));
2404 HOTSPOT_JNI_SETSTATICOBJECTFIELD_RETURN();
2405 JNI_END
2406
2407
2408
2409 #define DEFINE_SETSTATICFIELD(Argument,Fieldname,Result,SigType,unionType \
2410 , EntryProbe, ReturnProbe) \
2411 \
2412 JNI_ENTRY(void, jni_SetStatic##Result##Field(JNIEnv *env, jclass clazz, jfieldID fieldID, Argument value)) \
2413 JNIWrapper("SetStatic" XSTR(Result) "Field"); \
2414 EntryProbe; \
2415 \
2416 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID); \
2417 assert(id->is_static_field_id(), "invalid static field id"); \
2418 /* Keep JVMTI addition small and only check enabled flag here. */ \
2419 /* jni_SetField_probe() assumes that is okay to create handles. */ \
2420 if (JvmtiExport::should_post_field_modification()) { \
2421 jvalue field_value; \
2422 field_value.unionType = value; \
2423 JvmtiExport::jni_SetField_probe(thread, NULL, NULL, id->holder(), fieldID, true, SigType, (jvalue *)&field_value); \
2424 } \
2425 if (SigType == 'Z') { value = ((jboolean)value) & 1; } \
2426 id->holder()->java_mirror()-> Fieldname##_field_put (id->offset(), value); \
2427 ReturnProbe;\
2428 JNI_END
2429
2430 DEFINE_SETSTATICFIELD(jboolean, bool, Boolean, 'Z', z
2431 , HOTSPOT_JNI_SETSTATICBOOLEANFIELD_ENTRY(env, clazz, (uintptr_t)fieldID, value),
2432 HOTSPOT_JNI_SETSTATICBOOLEANFIELD_RETURN())
2433 DEFINE_SETSTATICFIELD(jbyte, byte, Byte, 'B', b
2434 , HOTSPOT_JNI_SETSTATICBYTEFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value),
2435 HOTSPOT_JNI_SETSTATICBYTEFIELD_RETURN())
2436 DEFINE_SETSTATICFIELD(jchar, char, Char, 'C', c
2437 , HOTSPOT_JNI_SETSTATICCHARFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value),
2438 HOTSPOT_JNI_SETSTATICCHARFIELD_RETURN())
2439 DEFINE_SETSTATICFIELD(jshort, short, Short, 'S', s
2440 , HOTSPOT_JNI_SETSTATICSHORTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value),
2441 HOTSPOT_JNI_SETSTATICSHORTFIELD_RETURN())
2442 DEFINE_SETSTATICFIELD(jint, int, Int, 'I', i
2443 , HOTSPOT_JNI_SETSTATICINTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value),
2444 HOTSPOT_JNI_SETSTATICINTFIELD_RETURN())
2445 DEFINE_SETSTATICFIELD(jlong, long, Long, 'J', j
2446 , HOTSPOT_JNI_SETSTATICLONGFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value),
2447 HOTSPOT_JNI_SETSTATICLONGFIELD_RETURN())
2448 // Float and double probes don't return value because dtrace doesn't currently support it
2449 DEFINE_SETSTATICFIELD(jfloat, float, Float, 'F', f
2450 , HOTSPOT_JNI_SETSTATICFLOATFIELD_ENTRY(env, clazz, (uintptr_t) fieldID),
2451 HOTSPOT_JNI_SETSTATICFLOATFIELD_RETURN())
2452 DEFINE_SETSTATICFIELD(jdouble, double, Double, 'D', d
2453 , HOTSPOT_JNI_SETSTATICDOUBLEFIELD_ENTRY(env, clazz, (uintptr_t) fieldID),
2454 HOTSPOT_JNI_SETSTATICDOUBLEFIELD_RETURN())
2455
2456 //
2457 // String Operations
2458 //
2459
2460 // Unicode Interface
2461
2462 DT_RETURN_MARK_DECL(NewString, jstring
2463 , HOTSPOT_JNI_NEWSTRING_RETURN(_ret_ref));
2464
2465 JNI_ENTRY(jstring, jni_NewString(JNIEnv *env, const jchar *unicodeChars, jsize len))
2466 JNIWrapper("NewString");
2467 HOTSPOT_JNI_NEWSTRING_ENTRY(env, (uint16_t *) unicodeChars, len);
2468 jstring ret = NULL;
2469 DT_RETURN_MARK(NewString, jstring, (const jstring&)ret);
2470 oop string=java_lang_String::create_oop_from_unicode((jchar*) unicodeChars, len, CHECK_NULL);
2471 ret = (jstring) JNIHandles::make_local(env, string);
2472 return ret;
2473 JNI_END
2474
2475
2476 JNI_ENTRY_NO_PRESERVE(jsize, jni_GetStringLength(JNIEnv *env, jstring string))
2477 JNIWrapper("GetStringLength");
2478 HOTSPOT_JNI_GETSTRINGLENGTH_ENTRY(env, string);
2479 jsize ret = 0;
2480 oop s = JNIHandles::resolve_non_null(string);
2481 ret = java_lang_String::length(s);
2482 HOTSPOT_JNI_GETSTRINGLENGTH_RETURN(ret);
2483 return ret;
2484 JNI_END
2485
2486
2487 JNI_ENTRY_NO_PRESERVE(const jchar*, jni_GetStringChars(
2488 JNIEnv *env, jstring string, jboolean *isCopy))
2489 JNIWrapper("GetStringChars");
2490 HOTSPOT_JNI_GETSTRINGCHARS_ENTRY(env, string, (uintptr_t *) isCopy);
2491 jchar* buf = NULL;
2492 oop s = JNIHandles::resolve_non_null(string);
2493 typeArrayOop s_value = java_lang_String::value(s);
2494 if (s_value != NULL) {
2495 int s_len = java_lang_String::length(s, s_value);
2496 bool is_latin1 = java_lang_String::is_latin1(s);
2497 buf = NEW_C_HEAP_ARRAY_RETURN_NULL(jchar, s_len + 1, mtInternal); // add one for zero termination
2498 /* JNI Specification states return NULL on OOM */
2499 if (buf != NULL) {
2500 if (s_len > 0) {
2501 if (!is_latin1) {
2502 ArrayAccess<>::arraycopy_to_native(s_value, (size_t) typeArrayOopDesc::element_offset<jchar>(0),
2503 buf, s_len);
2504 } else {
2505 for (int i = 0; i < s_len; i++) {
2506 buf[i] = ((jchar) s_value->byte_at(i)) & 0xff;
2507 }
2508 }
2509 }
2510 buf[s_len] = 0;
2511 //%note jni_5
2512 if (isCopy != NULL) {
2513 *isCopy = JNI_TRUE;
2514 }
2515 }
2516 }
2517 HOTSPOT_JNI_GETSTRINGCHARS_RETURN(buf);
2518 return buf;
2519 JNI_END
2520
2521
2522 JNI_ENTRY_NO_PRESERVE(void, jni_ReleaseStringChars(JNIEnv *env, jstring str, const jchar *chars))
2523 JNIWrapper("ReleaseStringChars");
2524 HOTSPOT_JNI_RELEASESTRINGCHARS_ENTRY(env, str, (uint16_t *) chars);
2525 //%note jni_6
2526 if (chars != NULL) {
2527 // Since String objects are supposed to be immutable, don't copy any
2528 // new data back. A bad user will have to go after the char array.
2529 FreeHeap((void*) chars);
2530 }
2531 HOTSPOT_JNI_RELEASESTRINGCHARS_RETURN();
2532 JNI_END
2533
2534
2535 // UTF Interface
2536
2537 DT_RETURN_MARK_DECL(NewStringUTF, jstring
2538 , HOTSPOT_JNI_NEWSTRINGUTF_RETURN(_ret_ref));
2539
2540 JNI_ENTRY(jstring, jni_NewStringUTF(JNIEnv *env, const char *bytes))
2541 JNIWrapper("NewStringUTF");
2542 HOTSPOT_JNI_NEWSTRINGUTF_ENTRY(env, (char *) bytes);
2543 jstring ret;
2544 DT_RETURN_MARK(NewStringUTF, jstring, (const jstring&)ret);
2545
2546 oop result = java_lang_String::create_oop_from_str((char*) bytes, CHECK_NULL);
2547 ret = (jstring) JNIHandles::make_local(env, result);
2548 return ret;
2549 JNI_END
2550
2551
2552 JNI_ENTRY(jsize, jni_GetStringUTFLength(JNIEnv *env, jstring string))
2553 JNIWrapper("GetStringUTFLength");
2554 HOTSPOT_JNI_GETSTRINGUTFLENGTH_ENTRY(env, string);
2555 oop java_string = JNIHandles::resolve_non_null(string);
2556 jsize ret = java_lang_String::utf8_length(java_string);
2557 HOTSPOT_JNI_GETSTRINGUTFLENGTH_RETURN(ret);
2558 return ret;
2559 JNI_END
2560
2561
2562 JNI_ENTRY(const char*, jni_GetStringUTFChars(JNIEnv *env, jstring string, jboolean *isCopy))
2563 JNIWrapper("GetStringUTFChars");
2564 HOTSPOT_JNI_GETSTRINGUTFCHARS_ENTRY(env, string, (uintptr_t *) isCopy);
2565 char* result = NULL;
2566 oop java_string = JNIHandles::resolve_non_null(string);
2567 typeArrayOop s_value = java_lang_String::value(java_string);
2568 if (s_value != NULL) {
2569 size_t length = java_lang_String::utf8_length(java_string, s_value);
2570 /* JNI Specification states return NULL on OOM */
2571 result = AllocateHeap(length + 1, mtInternal, 0, AllocFailStrategy::RETURN_NULL);
2572 if (result != NULL) {
2573 java_lang_String::as_utf8_string(java_string, s_value, result, (int) length + 1);
2574 if (isCopy != NULL) {
2575 *isCopy = JNI_TRUE;
2576 }
2577 }
2578 }
2579 HOTSPOT_JNI_GETSTRINGUTFCHARS_RETURN(result);
2580 return result;
2581 JNI_END
2582
2583
2584 JNI_LEAF(void, jni_ReleaseStringUTFChars(JNIEnv *env, jstring str, const char *chars))
2585 JNIWrapper("ReleaseStringUTFChars");
2586 HOTSPOT_JNI_RELEASESTRINGUTFCHARS_ENTRY(env, str, (char *) chars);
2587 if (chars != NULL) {
2588 FreeHeap((char*) chars);
2589 }
2590 HOTSPOT_JNI_RELEASESTRINGUTFCHARS_RETURN();
2591 JNI_END
2592
2593
2594 JNI_ENTRY_NO_PRESERVE(jsize, jni_GetArrayLength(JNIEnv *env, jarray array))
2595 JNIWrapper("GetArrayLength");
2596 HOTSPOT_JNI_GETARRAYLENGTH_ENTRY(env, array);
2597 arrayOop a = arrayOop(JNIHandles::resolve_non_null(array));
2598 assert(a->is_array(), "must be array");
2599 jsize ret = a->length();
2600 HOTSPOT_JNI_GETARRAYLENGTH_RETURN(ret);
2601 return ret;
2602 JNI_END
2603
2604
2605 //
2606 // Object Array Operations
2607 //
2608
2609 DT_RETURN_MARK_DECL(NewObjectArray, jobjectArray
2610 , HOTSPOT_JNI_NEWOBJECTARRAY_RETURN(_ret_ref));
2611
2612 JNI_ENTRY(jobjectArray, jni_NewObjectArray(JNIEnv *env, jsize length, jclass elementClass, jobject initialElement))
2613 JNIWrapper("NewObjectArray");
2614 HOTSPOT_JNI_NEWOBJECTARRAY_ENTRY(env, length, elementClass, initialElement);
2615 jobjectArray ret = NULL;
2616 DT_RETURN_MARK(NewObjectArray, jobjectArray, (const jobjectArray&)ret);
2617 Klass* ek = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(elementClass));
2618 Klass* ak = ek->array_klass(CHECK_NULL);
2619 ObjArrayKlass::cast(ak)->initialize(CHECK_NULL);
2620 objArrayOop result = ObjArrayKlass::cast(ak)->allocate(length, CHECK_NULL);
2621 oop initial_value = JNIHandles::resolve(initialElement);
2622 if (initial_value != NULL) { // array already initialized with NULL
2623 for (int index = 0; index < length; index++) {
2624 result->obj_at_put(index, initial_value);
2625 }
2626 }
2627 ret = (jobjectArray) JNIHandles::make_local(env, result);
2628 return ret;
2629 JNI_END
2630
2631 DT_RETURN_MARK_DECL(GetObjectArrayElement, jobject
2632 , HOTSPOT_JNI_GETOBJECTARRAYELEMENT_RETURN(_ret_ref));
2633
2634 JNI_ENTRY(jobject, jni_GetObjectArrayElement(JNIEnv *env, jobjectArray array, jsize index))
2635 JNIWrapper("GetObjectArrayElement");
2636 HOTSPOT_JNI_GETOBJECTARRAYELEMENT_ENTRY(env, array, index);
2637 jobject ret = NULL;
2638 DT_RETURN_MARK(GetObjectArrayElement, jobject, (const jobject&)ret);
2639 oop res = NULL;
2640 arrayOop arr((arrayOop)JNIHandles::resolve_non_null(array));
2641 if (arr->is_within_bounds(index)) {
2642 if (arr->is_valueArray()) {
2643 valueArrayOop a = valueArrayOop(JNIHandles::resolve_non_null(array));
2644 arrayHandle ah(THREAD, a);
2645 valueArrayHandle vah(thread, a);
2646 res = valueArrayOopDesc::value_alloc_copy_from_index(vah, index, CHECK_NULL);
2647 assert(res != NULL, "Must be set in one of two paths above");
2648 } else {
2649 assert(arr->is_objArray(), "If not a valueArray. must be an objArray");
2650 objArrayOop a = objArrayOop(JNIHandles::resolve_non_null(array));
2651 res = a->obj_at(index);
2652 }
2653 } else {
2654 ResourceMark rm(THREAD);
2655 stringStream ss;
2656 ss.print("Index %d out of bounds for length %d", index,arr->length());
2657 THROW_MSG_0(vmSymbols::java_lang_ArrayIndexOutOfBoundsException(), ss.as_string());
2658 }
2659 ret = JNIHandles::make_local(env, res);
2660 return ret;
2661 JNI_END
2662
2663 DT_VOID_RETURN_MARK_DECL(SetObjectArrayElement
2664 , HOTSPOT_JNI_SETOBJECTARRAYELEMENT_RETURN());
2665
2666 JNI_ENTRY(void, jni_SetObjectArrayElement(JNIEnv *env, jobjectArray array, jsize index, jobject value))
2667 JNIWrapper("SetObjectArrayElement");
2668 HOTSPOT_JNI_SETOBJECTARRAYELEMENT_ENTRY(env, array, index, value);
2669 DT_VOID_RETURN_MARK(SetObjectArrayElement);
2670
2671 bool oob = false;
2672 int length = -1;
2673 oop res = NULL;
2674 arrayOop arr((arrayOop)JNIHandles::resolve_non_null(array));
2675 if (arr->is_within_bounds(index)) {
2676 if (arr->is_valueArray()) {
2677 valueArrayOop a = valueArrayOop(JNIHandles::resolve_non_null(array));
2678 oop v = JNIHandles::resolve(value);
2679 ValueArrayKlass* vaklass = ValueArrayKlass::cast(a->klass());
2680 ValueKlass* element_vklass = vaklass->element_klass();
2681 if (v != NULL && v->is_a(element_vklass)) {
2682 a->value_copy_to_index(v, index);
2683 } else {
2684 ResourceMark rm(THREAD);
2685 stringStream ss;
2686 Klass *kl = ValueArrayKlass::cast(a->klass());
2687 ss.print("type mismatch: can not store %s to %s[%d]",
2688 v->klass()->external_name(),
2689 kl->external_name(),
2690 index);
2691 for (int dims = ArrayKlass::cast(a->klass())->dimension(); dims > 1; --dims) {
2692 ss.print("[]");
2693 }
2694 THROW_MSG(vmSymbols::java_lang_ArrayStoreException(), ss.as_string());
2695 }
2696 } else {
2697 assert(arr->is_objArray(), "If not a valueArray. must be an objArray");
2698 objArrayOop a = objArrayOop(JNIHandles::resolve_non_null(array));
2699 oop v = JNIHandles::resolve(value);
2700 if (v == NULL || v->is_a(ObjArrayKlass::cast(a->klass())->element_klass())) {
2701 a->obj_at_put(index, v);
2702 } else {
2703 ResourceMark rm(THREAD);
2704 stringStream ss;
2705 Klass *bottom_kl = ObjArrayKlass::cast(a->klass())->bottom_klass();
2706 ss.print("type mismatch: can not store %s to %s[%d]",
2707 v->klass()->external_name(),
2708 bottom_kl->is_typeArray_klass() ? type2name_tab[ArrayKlass::cast(bottom_kl)->element_type()] : bottom_kl->external_name(),
2709 index);
2710 for (int dims = ArrayKlass::cast(a->klass())->dimension(); dims > 1; --dims) {
2711 ss.print("[]");
2712 }
2713 THROW_MSG(vmSymbols::java_lang_ArrayStoreException(), ss.as_string());
2714 }
2715 }
2716 } else {
2717 ResourceMark rm(THREAD);
2718 stringStream ss;
2719 ss.print("Index %d out of bounds for length %d", index, arr->length());
2720 THROW_MSG(vmSymbols::java_lang_ArrayIndexOutOfBoundsException(), ss.as_string());
2721 }
2722 JNI_END
2723
2724
2725
2726 #define DEFINE_NEWSCALARARRAY(Return,Allocator,Result \
2727 ,EntryProbe,ReturnProbe) \
2728 \
2729 DT_RETURN_MARK_DECL(New##Result##Array, Return \
2730 , ReturnProbe); \
2731 \
2732 JNI_ENTRY(Return, \
2733 jni_New##Result##Array(JNIEnv *env, jsize len)) \
2734 JNIWrapper("New" XSTR(Result) "Array"); \
2735 EntryProbe; \
2736 Return ret = NULL;\
2737 DT_RETURN_MARK(New##Result##Array, Return, (const Return&)ret);\
2738 \
2739 oop obj= oopFactory::Allocator(len, CHECK_0); \
2740 ret = (Return) JNIHandles::make_local(env, obj); \
2741 return ret;\
2742 JNI_END
2743
2744 DEFINE_NEWSCALARARRAY(jbooleanArray, new_boolArray, Boolean,
2745 HOTSPOT_JNI_NEWBOOLEANARRAY_ENTRY(env, len),
2746 HOTSPOT_JNI_NEWBOOLEANARRAY_RETURN(_ret_ref))
2747 DEFINE_NEWSCALARARRAY(jbyteArray, new_byteArray, Byte,
2748 HOTSPOT_JNI_NEWBYTEARRAY_ENTRY(env, len),
2749 HOTSPOT_JNI_NEWBYTEARRAY_RETURN(_ret_ref))
2750 DEFINE_NEWSCALARARRAY(jshortArray, new_shortArray, Short,
2751 HOTSPOT_JNI_NEWSHORTARRAY_ENTRY(env, len),
2752 HOTSPOT_JNI_NEWSHORTARRAY_RETURN(_ret_ref))
2753 DEFINE_NEWSCALARARRAY(jcharArray, new_charArray, Char,
2754 HOTSPOT_JNI_NEWCHARARRAY_ENTRY(env, len),
2755 HOTSPOT_JNI_NEWCHARARRAY_RETURN(_ret_ref))
2756 DEFINE_NEWSCALARARRAY(jintArray, new_intArray, Int,
2757 HOTSPOT_JNI_NEWINTARRAY_ENTRY(env, len),
2758 HOTSPOT_JNI_NEWINTARRAY_RETURN(_ret_ref))
2759 DEFINE_NEWSCALARARRAY(jlongArray, new_longArray, Long,
2760 HOTSPOT_JNI_NEWLONGARRAY_ENTRY(env, len),
2761 HOTSPOT_JNI_NEWLONGARRAY_RETURN(_ret_ref))
2762 DEFINE_NEWSCALARARRAY(jfloatArray, new_floatArray, Float,
2763 HOTSPOT_JNI_NEWFLOATARRAY_ENTRY(env, len),
2764 HOTSPOT_JNI_NEWFLOATARRAY_RETURN(_ret_ref))
2765 DEFINE_NEWSCALARARRAY(jdoubleArray, new_doubleArray, Double,
2766 HOTSPOT_JNI_NEWDOUBLEARRAY_ENTRY(env, len),
2767 HOTSPOT_JNI_NEWDOUBLEARRAY_RETURN(_ret_ref))
2768
2769 // Return an address which will fault if the caller writes to it.
2770
2771 static char* get_bad_address() {
2772 static char* bad_address = NULL;
2773 if (bad_address == NULL) {
2774 size_t size = os::vm_allocation_granularity();
2775 bad_address = os::reserve_memory(size);
2776 if (bad_address != NULL) {
2777 os::protect_memory(bad_address, size, os::MEM_PROT_READ,
2778 /*is_committed*/false);
2779 MemTracker::record_virtual_memory_type((void*)bad_address, mtInternal);
2780 }
2781 }
2782 return bad_address;
2783 }
2784
2785
2786
2787 #define DEFINE_GETSCALARARRAYELEMENTS(ElementTag,ElementType,Result, Tag \
2788 , EntryProbe, ReturnProbe) \
2789 \
2790 JNI_ENTRY_NO_PRESERVE(ElementType*, \
2791 jni_Get##Result##ArrayElements(JNIEnv *env, ElementType##Array array, jboolean *isCopy)) \
2792 JNIWrapper("Get" XSTR(Result) "ArrayElements"); \
2793 EntryProbe; \
2794 /* allocate an chunk of memory in c land */ \
2795 typeArrayOop a = typeArrayOop(JNIHandles::resolve_non_null(array)); \
2796 ElementType* result; \
2797 int len = a->length(); \
2798 if (len == 0) { \
2799 if (isCopy != NULL) { \
2800 *isCopy = JNI_FALSE; \
2801 } \
2802 /* Empty array: legal but useless, can't return NULL. \
2803 * Return a pointer to something useless. \
2804 * Avoid asserts in typeArrayOop. */ \
2805 result = (ElementType*)get_bad_address(); \
2806 } else { \
2807 /* JNI Specification states return NULL on OOM */ \
2808 result = NEW_C_HEAP_ARRAY_RETURN_NULL(ElementType, len, mtInternal); \
2809 if (result != NULL) { \
2810 /* copy the array to the c chunk */ \
2811 ArrayAccess<>::arraycopy_to_native(a, typeArrayOopDesc::element_offset<ElementType>(0), \
2812 result, len); \
2813 if (isCopy) { \
2814 *isCopy = JNI_TRUE; \
2815 } \
2816 } \
2817 } \
2818 ReturnProbe; \
2819 return result; \
2820 JNI_END
2821
2822 DEFINE_GETSCALARARRAYELEMENTS(T_BOOLEAN, jboolean, Boolean, bool
2823 , HOTSPOT_JNI_GETBOOLEANARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy),
2824 HOTSPOT_JNI_GETBOOLEANARRAYELEMENTS_RETURN((uintptr_t*)result))
2825 DEFINE_GETSCALARARRAYELEMENTS(T_BYTE, jbyte, Byte, byte
2826 , HOTSPOT_JNI_GETBYTEARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy),
2827 HOTSPOT_JNI_GETBYTEARRAYELEMENTS_RETURN((char*)result))
2828 DEFINE_GETSCALARARRAYELEMENTS(T_SHORT, jshort, Short, short
2829 , HOTSPOT_JNI_GETSHORTARRAYELEMENTS_ENTRY(env, (uint16_t*) array, (uintptr_t *) isCopy),
2830 HOTSPOT_JNI_GETSHORTARRAYELEMENTS_RETURN((uint16_t*)result))
2831 DEFINE_GETSCALARARRAYELEMENTS(T_CHAR, jchar, Char, char
2832 , HOTSPOT_JNI_GETCHARARRAYELEMENTS_ENTRY(env, (uint16_t*) array, (uintptr_t *) isCopy),
2833 HOTSPOT_JNI_GETCHARARRAYELEMENTS_RETURN(result))
2834 DEFINE_GETSCALARARRAYELEMENTS(T_INT, jint, Int, int
2835 , HOTSPOT_JNI_GETINTARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy),
2836 HOTSPOT_JNI_GETINTARRAYELEMENTS_RETURN((uint32_t*)result))
2837 DEFINE_GETSCALARARRAYELEMENTS(T_LONG, jlong, Long, long
2838 , HOTSPOT_JNI_GETLONGARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy),
2839 HOTSPOT_JNI_GETLONGARRAYELEMENTS_RETURN(((uintptr_t*)result)))
2840 // Float and double probes don't return value because dtrace doesn't currently support it
2841 DEFINE_GETSCALARARRAYELEMENTS(T_FLOAT, jfloat, Float, float
2842 , HOTSPOT_JNI_GETFLOATARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy),
2843 HOTSPOT_JNI_GETFLOATARRAYELEMENTS_RETURN(result))
2844 DEFINE_GETSCALARARRAYELEMENTS(T_DOUBLE, jdouble, Double, double
2845 , HOTSPOT_JNI_GETDOUBLEARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy),
2846 HOTSPOT_JNI_GETDOUBLEARRAYELEMENTS_RETURN(result))
2847
2848
2849 #define DEFINE_RELEASESCALARARRAYELEMENTS(ElementTag,ElementType,Result,Tag \
2850 , EntryProbe, ReturnProbe);\
2851 \
2852 JNI_ENTRY_NO_PRESERVE(void, \
2853 jni_Release##Result##ArrayElements(JNIEnv *env, ElementType##Array array, \
2854 ElementType *buf, jint mode)) \
2855 JNIWrapper("Release" XSTR(Result) "ArrayElements"); \
2856 EntryProbe; \
2857 typeArrayOop a = typeArrayOop(JNIHandles::resolve_non_null(array)); \
2858 int len = a->length(); \
2859 if (len != 0) { /* Empty array: nothing to free or copy. */ \
2860 if ((mode == 0) || (mode == JNI_COMMIT)) { \
2861 ArrayAccess<>::arraycopy_from_native(buf, a, typeArrayOopDesc::element_offset<ElementType>(0), len); \
2862 } \
2863 if ((mode == 0) || (mode == JNI_ABORT)) { \
2864 FreeHeap(buf); \
2865 } \
2866 } \
2867 ReturnProbe; \
2868 JNI_END
2869
2870 DEFINE_RELEASESCALARARRAYELEMENTS(T_BOOLEAN, jboolean, Boolean, bool
2871 , HOTSPOT_JNI_RELEASEBOOLEANARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) buf, mode),
2872 HOTSPOT_JNI_RELEASEBOOLEANARRAYELEMENTS_RETURN())
2873 DEFINE_RELEASESCALARARRAYELEMENTS(T_BYTE, jbyte, Byte, byte
2874 , HOTSPOT_JNI_RELEASEBYTEARRAYELEMENTS_ENTRY(env, array, (char *) buf, mode),
2875 HOTSPOT_JNI_RELEASEBYTEARRAYELEMENTS_RETURN())
2876 DEFINE_RELEASESCALARARRAYELEMENTS(T_SHORT, jshort, Short, short
2877 , HOTSPOT_JNI_RELEASESHORTARRAYELEMENTS_ENTRY(env, array, (uint16_t *) buf, mode),
2878 HOTSPOT_JNI_RELEASESHORTARRAYELEMENTS_RETURN())
2879 DEFINE_RELEASESCALARARRAYELEMENTS(T_CHAR, jchar, Char, char
2880 , HOTSPOT_JNI_RELEASECHARARRAYELEMENTS_ENTRY(env, array, (uint16_t *) buf, mode),
2881 HOTSPOT_JNI_RELEASECHARARRAYELEMENTS_RETURN())
2882 DEFINE_RELEASESCALARARRAYELEMENTS(T_INT, jint, Int, int
2883 , HOTSPOT_JNI_RELEASEINTARRAYELEMENTS_ENTRY(env, array, (uint32_t *) buf, mode),
2884 HOTSPOT_JNI_RELEASEINTARRAYELEMENTS_RETURN())
2885 DEFINE_RELEASESCALARARRAYELEMENTS(T_LONG, jlong, Long, long
2886 , HOTSPOT_JNI_RELEASELONGARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) buf, mode),
2887 HOTSPOT_JNI_RELEASELONGARRAYELEMENTS_RETURN())
2888 DEFINE_RELEASESCALARARRAYELEMENTS(T_FLOAT, jfloat, Float, float
2889 , HOTSPOT_JNI_RELEASEFLOATARRAYELEMENTS_ENTRY(env, array, (float *) buf, mode),
2890 HOTSPOT_JNI_RELEASEFLOATARRAYELEMENTS_RETURN())
2891 DEFINE_RELEASESCALARARRAYELEMENTS(T_DOUBLE, jdouble, Double, double
2892 , HOTSPOT_JNI_RELEASEDOUBLEARRAYELEMENTS_ENTRY(env, array, (double *) buf, mode),
2893 HOTSPOT_JNI_RELEASEDOUBLEARRAYELEMENTS_RETURN())
2894
2895 static void check_bounds(jsize start, jsize copy_len, jsize array_len, TRAPS) {
2896 ResourceMark rm(THREAD);
2897 if (copy_len < 0) {
2898 stringStream ss;
2899 ss.print("Length %d is negative", copy_len);
2900 THROW_MSG(vmSymbols::java_lang_ArrayIndexOutOfBoundsException(), ss.as_string());
2901 } else if (start < 0 || (start > array_len - copy_len)) {
2902 stringStream ss;
2903 ss.print("Array region %d.." INT64_FORMAT " out of bounds for length %d",
2904 start, (int64_t)start+(int64_t)copy_len, array_len);
2905 THROW_MSG(vmSymbols::java_lang_ArrayIndexOutOfBoundsException(), ss.as_string());
2906 }
2907 }
2908
2909 #define DEFINE_GETSCALARARRAYREGION(ElementTag,ElementType,Result, Tag \
2910 , EntryProbe, ReturnProbe); \
2911 DT_VOID_RETURN_MARK_DECL(Get##Result##ArrayRegion \
2912 , ReturnProbe); \
2913 \
2914 JNI_ENTRY(void, \
2915 jni_Get##Result##ArrayRegion(JNIEnv *env, ElementType##Array array, jsize start, \
2916 jsize len, ElementType *buf)) \
2917 JNIWrapper("Get" XSTR(Result) "ArrayRegion"); \
2918 EntryProbe; \
2919 DT_VOID_RETURN_MARK(Get##Result##ArrayRegion); \
2920 typeArrayOop src = typeArrayOop(JNIHandles::resolve_non_null(array)); \
2921 check_bounds(start, len, src->length(), CHECK); \
2922 if (len > 0) { \
2923 ArrayAccess<>::arraycopy_to_native(src, typeArrayOopDesc::element_offset<ElementType>(start), buf, len); \
2924 } \
2925 JNI_END
2926
2927 DEFINE_GETSCALARARRAYREGION(T_BOOLEAN, jboolean,Boolean, bool
2928 , HOTSPOT_JNI_GETBOOLEANARRAYREGION_ENTRY(env, array, start, len, (uintptr_t *) buf),
2929 HOTSPOT_JNI_GETBOOLEANARRAYREGION_RETURN());
2930 DEFINE_GETSCALARARRAYREGION(T_BYTE, jbyte, Byte, byte
2931 , HOTSPOT_JNI_GETBYTEARRAYREGION_ENTRY(env, array, start, len, (char *) buf),
2932 HOTSPOT_JNI_GETBYTEARRAYREGION_RETURN());
2933 DEFINE_GETSCALARARRAYREGION(T_SHORT, jshort, Short, short
2934 , HOTSPOT_JNI_GETSHORTARRAYREGION_ENTRY(env, array, start, len, (uint16_t *) buf),
2935 HOTSPOT_JNI_GETSHORTARRAYREGION_RETURN());
2936 DEFINE_GETSCALARARRAYREGION(T_CHAR, jchar, Char, char
2937 , HOTSPOT_JNI_GETCHARARRAYREGION_ENTRY(env, array, start, len, (uint16_t*) buf),
2938 HOTSPOT_JNI_GETCHARARRAYREGION_RETURN());
2939 DEFINE_GETSCALARARRAYREGION(T_INT, jint, Int, int
2940 , HOTSPOT_JNI_GETINTARRAYREGION_ENTRY(env, array, start, len, (uint32_t*) buf),
2941 HOTSPOT_JNI_GETINTARRAYREGION_RETURN());
2942 DEFINE_GETSCALARARRAYREGION(T_LONG, jlong, Long, long
2943 , HOTSPOT_JNI_GETLONGARRAYREGION_ENTRY(env, array, start, len, (uintptr_t *) buf),
2944 HOTSPOT_JNI_GETLONGARRAYREGION_RETURN());
2945 DEFINE_GETSCALARARRAYREGION(T_FLOAT, jfloat, Float, float
2946 , HOTSPOT_JNI_GETFLOATARRAYREGION_ENTRY(env, array, start, len, (float *) buf),
2947 HOTSPOT_JNI_GETFLOATARRAYREGION_RETURN());
2948 DEFINE_GETSCALARARRAYREGION(T_DOUBLE, jdouble, Double, double
2949 , HOTSPOT_JNI_GETDOUBLEARRAYREGION_ENTRY(env, array, start, len, (double *) buf),
2950 HOTSPOT_JNI_GETDOUBLEARRAYREGION_RETURN());
2951
2952
2953 #define DEFINE_SETSCALARARRAYREGION(ElementTag,ElementType,Result, Tag \
2954 , EntryProbe, ReturnProbe); \
2955 DT_VOID_RETURN_MARK_DECL(Set##Result##ArrayRegion \
2956 ,ReturnProbe); \
2957 \
2958 JNI_ENTRY(void, \
2959 jni_Set##Result##ArrayRegion(JNIEnv *env, ElementType##Array array, jsize start, \
2960 jsize len, const ElementType *buf)) \
2961 JNIWrapper("Set" XSTR(Result) "ArrayRegion"); \
2962 EntryProbe; \
2963 DT_VOID_RETURN_MARK(Set##Result##ArrayRegion); \
2964 typeArrayOop dst = typeArrayOop(JNIHandles::resolve_non_null(array)); \
2965 check_bounds(start, len, dst->length(), CHECK); \
2966 if (len > 0) { \
2967 ArrayAccess<>::arraycopy_from_native(buf, dst, typeArrayOopDesc::element_offset<ElementType>(start), len); \
2968 } \
2969 JNI_END
2970
2971 DEFINE_SETSCALARARRAYREGION(T_BOOLEAN, jboolean, Boolean, bool
2972 , HOTSPOT_JNI_SETBOOLEANARRAYREGION_ENTRY(env, array, start, len, (uintptr_t *)buf),
2973 HOTSPOT_JNI_SETBOOLEANARRAYREGION_RETURN())
2974 DEFINE_SETSCALARARRAYREGION(T_BYTE, jbyte, Byte, byte
2975 , HOTSPOT_JNI_SETBYTEARRAYREGION_ENTRY(env, array, start, len, (char *) buf),
2976 HOTSPOT_JNI_SETBYTEARRAYREGION_RETURN())
2977 DEFINE_SETSCALARARRAYREGION(T_SHORT, jshort, Short, short
2978 , HOTSPOT_JNI_SETSHORTARRAYREGION_ENTRY(env, array, start, len, (uint16_t *) buf),
2979 HOTSPOT_JNI_SETSHORTARRAYREGION_RETURN())
2980 DEFINE_SETSCALARARRAYREGION(T_CHAR, jchar, Char, char
2981 , HOTSPOT_JNI_SETCHARARRAYREGION_ENTRY(env, array, start, len, (uint16_t *) buf),
2982 HOTSPOT_JNI_SETCHARARRAYREGION_RETURN())
2983 DEFINE_SETSCALARARRAYREGION(T_INT, jint, Int, int
2984 , HOTSPOT_JNI_SETINTARRAYREGION_ENTRY(env, array, start, len, (uint32_t *) buf),
2985 HOTSPOT_JNI_SETINTARRAYREGION_RETURN())
2986 DEFINE_SETSCALARARRAYREGION(T_LONG, jlong, Long, long
2987 , HOTSPOT_JNI_SETLONGARRAYREGION_ENTRY(env, array, start, len, (uintptr_t *) buf),
2988 HOTSPOT_JNI_SETLONGARRAYREGION_RETURN())
2989 DEFINE_SETSCALARARRAYREGION(T_FLOAT, jfloat, Float, float
2990 , HOTSPOT_JNI_SETFLOATARRAYREGION_ENTRY(env, array, start, len, (float *) buf),
2991 HOTSPOT_JNI_SETFLOATARRAYREGION_RETURN())
2992 DEFINE_SETSCALARARRAYREGION(T_DOUBLE, jdouble, Double, double
2993 , HOTSPOT_JNI_SETDOUBLEARRAYREGION_ENTRY(env, array, start, len, (double *) buf),
2994 HOTSPOT_JNI_SETDOUBLEARRAYREGION_RETURN())
2995
2996
2997 //
2998 // Interception of natives
2999 //
3000
3001 // The RegisterNatives call being attempted tried to register with a method that
3002 // is not native. Ask JVM TI what prefixes have been specified. Then check
3003 // to see if the native method is now wrapped with the prefixes. See the
3004 // SetNativeMethodPrefix(es) functions in the JVM TI Spec for details.
3005 static Method* find_prefixed_native(Klass* k, Symbol* name, Symbol* signature, TRAPS) {
3006 #if INCLUDE_JVMTI
3007 ResourceMark rm(THREAD);
3008 Method* method;
3009 int name_len = name->utf8_length();
3010 char* name_str = name->as_utf8();
3011 int prefix_count;
3012 char** prefixes = JvmtiExport::get_all_native_method_prefixes(&prefix_count);
3013 for (int i = 0; i < prefix_count; i++) {
3014 char* prefix = prefixes[i];
3015 int prefix_len = (int)strlen(prefix);
3016
3017 // try adding this prefix to the method name and see if it matches another method name
3018 int trial_len = name_len + prefix_len;
3019 char* trial_name_str = NEW_RESOURCE_ARRAY(char, trial_len + 1);
3020 strcpy(trial_name_str, prefix);
3021 strcat(trial_name_str, name_str);
3022 TempNewSymbol trial_name = SymbolTable::probe(trial_name_str, trial_len);
3023 if (trial_name == NULL) {
3024 continue; // no such symbol, so this prefix wasn't used, try the next prefix
3025 }
3026 method = k->lookup_method(trial_name, signature);
3027 if (method == NULL) {
3028 continue; // signature doesn't match, try the next prefix
3029 }
3030 if (method->is_native()) {
3031 method->set_is_prefixed_native();
3032 return method; // wahoo, we found a prefixed version of the method, return it
3033 }
3034 // found as non-native, so prefix is good, add it, probably just need more prefixes
3035 name_len = trial_len;
3036 name_str = trial_name_str;
3037 }
3038 #endif // INCLUDE_JVMTI
3039 return NULL; // not found
3040 }
3041
3042 static bool register_native(Klass* k, Symbol* name, Symbol* signature, address entry, TRAPS) {
3043 Method* method = k->lookup_method(name, signature);
3044 if (method == NULL) {
3045 ResourceMark rm;
3046 stringStream st;
3047 st.print("Method '");
3048 Method::print_external_name(&st, k, name, signature);
3049 st.print("' name or signature does not match");
3050 THROW_MSG_(vmSymbols::java_lang_NoSuchMethodError(), st.as_string(), false);
3051 }
3052 if (!method->is_native()) {
3053 // trying to register to a non-native method, see if a JVM TI agent has added prefix(es)
3054 method = find_prefixed_native(k, name, signature, THREAD);
3055 if (method == NULL) {
3056 ResourceMark rm;
3057 stringStream st;
3058 st.print("Method '");
3059 Method::print_external_name(&st, k, name, signature);
3060 st.print("' is not declared as native");
3061 THROW_MSG_(vmSymbols::java_lang_NoSuchMethodError(), st.as_string(), false);
3062 }
3063 }
3064
3065 if (entry != NULL) {
3066 method->set_native_function(entry,
3067 Method::native_bind_event_is_interesting);
3068 } else {
3069 method->clear_native_function();
3070 }
3071 if (PrintJNIResolving) {
3072 ResourceMark rm(THREAD);
3073 tty->print_cr("[Registering JNI native method %s.%s]",
3074 method->method_holder()->external_name(),
3075 method->name()->as_C_string());
3076 }
3077 return true;
3078 }
3079
3080 DT_RETURN_MARK_DECL(RegisterNatives, jint
3081 , HOTSPOT_JNI_REGISTERNATIVES_RETURN(_ret_ref));
3082
3083 JNI_ENTRY(jint, jni_RegisterNatives(JNIEnv *env, jclass clazz,
3084 const JNINativeMethod *methods,
3085 jint nMethods))
3086 JNIWrapper("RegisterNatives");
3087 HOTSPOT_JNI_REGISTERNATIVES_ENTRY(env, clazz, (void *) methods, nMethods);
3088 jint ret = 0;
3089 DT_RETURN_MARK(RegisterNatives, jint, (const jint&)ret);
3090
3091 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz));
3092
3093 for (int index = 0; index < nMethods; index++) {
3094 const char* meth_name = methods[index].name;
3095 const char* meth_sig = methods[index].signature;
3096 int meth_name_len = (int)strlen(meth_name);
3097
3098 // The class should have been loaded (we have an instance of the class
3099 // passed in) so the method and signature should already be in the symbol
3100 // table. If they're not there, the method doesn't exist.
3101 TempNewSymbol name = SymbolTable::probe(meth_name, meth_name_len);
3102 TempNewSymbol signature = SymbolTable::probe(meth_sig, (int)strlen(meth_sig));
3103
3104 if (name == NULL || signature == NULL) {
3105 ResourceMark rm;
3106 stringStream st;
3107 st.print("Method %s.%s%s not found", k->external_name(), meth_name, meth_sig);
3108 // Must return negative value on failure
3109 THROW_MSG_(vmSymbols::java_lang_NoSuchMethodError(), st.as_string(), -1);
3110 }
3111
3112 bool res = register_native(k, name, signature,
3113 (address) methods[index].fnPtr, THREAD);
3114 if (!res) {
3115 ret = -1;
3116 break;
3117 }
3118 }
3119 return ret;
3120 JNI_END
3121
3122
3123 JNI_ENTRY(jint, jni_UnregisterNatives(JNIEnv *env, jclass clazz))
3124 JNIWrapper("UnregisterNatives");
3125 HOTSPOT_JNI_UNREGISTERNATIVES_ENTRY(env, clazz);
3126 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz));
3127 //%note jni_2
3128 if (k->is_instance_klass()) {
3129 for (int index = 0; index < InstanceKlass::cast(k)->methods()->length(); index++) {
3130 Method* m = InstanceKlass::cast(k)->methods()->at(index);
3131 if (m->is_native()) {
3132 m->clear_native_function();
3133 m->set_signature_handler(NULL);
3134 }
3135 }
3136 }
3137 HOTSPOT_JNI_UNREGISTERNATIVES_RETURN(0);
3138 return 0;
3139 JNI_END
3140
3141 //
3142 // Monitor functions
3143 //
3144
3145 DT_RETURN_MARK_DECL(MonitorEnter, jint
3146 , HOTSPOT_JNI_MONITORENTER_RETURN(_ret_ref));
3147
3148 JNI_ENTRY(jint, jni_MonitorEnter(JNIEnv *env, jobject jobj))
3149 HOTSPOT_JNI_MONITORENTER_ENTRY(env, jobj);
3150 jint ret = JNI_ERR;
3151 DT_RETURN_MARK(MonitorEnter, jint, (const jint&)ret);
3152
3153 // If the object is null, we can't do anything with it
3154 if (jobj == NULL) {
3155 THROW_(vmSymbols::java_lang_NullPointerException(), JNI_ERR);
3156 }
3157
3158 Handle obj(thread, JNIHandles::resolve_non_null(jobj));
3159 ObjectSynchronizer::jni_enter(obj, CHECK_(JNI_ERR));
3160 ret = JNI_OK;
3161 return ret;
3162 JNI_END
3163
3164 DT_RETURN_MARK_DECL(MonitorExit, jint
3165 , HOTSPOT_JNI_MONITOREXIT_RETURN(_ret_ref));
3166
3167 JNI_ENTRY(jint, jni_MonitorExit(JNIEnv *env, jobject jobj))
3168 HOTSPOT_JNI_MONITOREXIT_ENTRY(env, jobj);
3169 jint ret = JNI_ERR;
3170 DT_RETURN_MARK(MonitorExit, jint, (const jint&)ret);
3171
3172 // Don't do anything with a null object
3173 if (jobj == NULL) {
3174 THROW_(vmSymbols::java_lang_NullPointerException(), JNI_ERR);
3175 }
3176
3177 Handle obj(THREAD, JNIHandles::resolve_non_null(jobj));
3178 ObjectSynchronizer::jni_exit(obj(), CHECK_(JNI_ERR));
3179
3180 ret = JNI_OK;
3181 return ret;
3182 JNI_END
3183
3184 //
3185 // Extensions
3186 //
3187
3188 DT_VOID_RETURN_MARK_DECL(GetStringRegion
3189 , HOTSPOT_JNI_GETSTRINGREGION_RETURN());
3190
3191 JNI_ENTRY(void, jni_GetStringRegion(JNIEnv *env, jstring string, jsize start, jsize len, jchar *buf))
3192 JNIWrapper("GetStringRegion");
3193 HOTSPOT_JNI_GETSTRINGREGION_ENTRY(env, string, start, len, buf);
3194 DT_VOID_RETURN_MARK(GetStringRegion);
3195 oop s = JNIHandles::resolve_non_null(string);
3196 typeArrayOop s_value = java_lang_String::value(s);
3197 int s_len = java_lang_String::length(s, s_value);
3198 if (start < 0 || len < 0 || start > s_len - len) {
3199 THROW(vmSymbols::java_lang_StringIndexOutOfBoundsException());
3200 } else {
3201 if (len > 0) {
3202 bool is_latin1 = java_lang_String::is_latin1(s);
3203 if (!is_latin1) {
3204 ArrayAccess<>::arraycopy_to_native(s_value, typeArrayOopDesc::element_offset<jchar>(start),
3205 buf, len);
3206 } else {
3207 for (int i = 0; i < len; i++) {
3208 buf[i] = ((jchar) s_value->byte_at(i + start)) & 0xff;
3209 }
3210 }
3211 }
3212 }
3213 JNI_END
3214
3215 DT_VOID_RETURN_MARK_DECL(GetStringUTFRegion
3216 , HOTSPOT_JNI_GETSTRINGUTFREGION_RETURN());
3217
3218 JNI_ENTRY(void, jni_GetStringUTFRegion(JNIEnv *env, jstring string, jsize start, jsize len, char *buf))
3219 JNIWrapper("GetStringUTFRegion");
3220 HOTSPOT_JNI_GETSTRINGUTFREGION_ENTRY(env, string, start, len, buf);
3221 DT_VOID_RETURN_MARK(GetStringUTFRegion);
3222 oop s = JNIHandles::resolve_non_null(string);
3223 typeArrayOop s_value = java_lang_String::value(s);
3224 int s_len = java_lang_String::length(s, s_value);
3225 if (start < 0 || len < 0 || start > s_len - len) {
3226 THROW(vmSymbols::java_lang_StringIndexOutOfBoundsException());
3227 } else {
3228 //%note jni_7
3229 if (len > 0) {
3230 // Assume the buffer is large enough as the JNI spec. does not require user error checking
3231 java_lang_String::as_utf8_string(s, s_value, start, len, buf, INT_MAX);
3232 // as_utf8_string null-terminates the result string
3233 } else {
3234 // JDK null-terminates the buffer even in len is zero
3235 if (buf != NULL) {
3236 buf[0] = 0;
3237 }
3238 }
3239 }
3240 JNI_END
3241
3242 static oop lock_gc_or_pin_object(JavaThread* thread, jobject obj) {
3243 if (Universe::heap()->supports_object_pinning()) {
3244 const oop o = JNIHandles::resolve_non_null(obj);
3245 return Universe::heap()->pin_object(thread, o);
3246 } else {
3247 GCLocker::lock_critical(thread);
3248 return JNIHandles::resolve_non_null(obj);
3249 }
3250 }
3251
3252 static void unlock_gc_or_unpin_object(JavaThread* thread, jobject obj) {
3253 if (Universe::heap()->supports_object_pinning()) {
3254 const oop o = JNIHandles::resolve_non_null(obj);
3255 return Universe::heap()->unpin_object(thread, o);
3256 } else {
3257 GCLocker::unlock_critical(thread);
3258 }
3259 }
3260
3261 JNI_ENTRY(void*, jni_GetPrimitiveArrayCritical(JNIEnv *env, jarray array, jboolean *isCopy))
3262 JNIWrapper("GetPrimitiveArrayCritical");
3263 HOTSPOT_JNI_GETPRIMITIVEARRAYCRITICAL_ENTRY(env, array, (uintptr_t *) isCopy);
3264 if (isCopy != NULL) {
3265 *isCopy = JNI_FALSE;
3266 }
3267 oop a = lock_gc_or_pin_object(thread, array);
3268 assert(a->is_array(), "just checking");
3269 BasicType type;
3270 if (a->is_objArray()) {
3271 type = T_OBJECT;
3272 } else {
3273 type = TypeArrayKlass::cast(a->klass())->element_type();
3274 }
3275 void* ret = arrayOop(a)->base(type);
3276 HOTSPOT_JNI_GETPRIMITIVEARRAYCRITICAL_RETURN(ret);
3277 return ret;
3278 JNI_END
3279
3280
3281 JNI_ENTRY(void, jni_ReleasePrimitiveArrayCritical(JNIEnv *env, jarray array, void *carray, jint mode))
3282 JNIWrapper("ReleasePrimitiveArrayCritical");
3283 HOTSPOT_JNI_RELEASEPRIMITIVEARRAYCRITICAL_ENTRY(env, array, carray, mode);
3284 unlock_gc_or_unpin_object(thread, array);
3285 HOTSPOT_JNI_RELEASEPRIMITIVEARRAYCRITICAL_RETURN();
3286 JNI_END
3287
3288
3289 JNI_ENTRY(const jchar*, jni_GetStringCritical(JNIEnv *env, jstring string, jboolean *isCopy))
3290 JNIWrapper("GetStringCritical");
3291 HOTSPOT_JNI_GETSTRINGCRITICAL_ENTRY(env, string, (uintptr_t *) isCopy);
3292 oop s = lock_gc_or_pin_object(thread, string);
3293 typeArrayOop s_value = java_lang_String::value(s);
3294 bool is_latin1 = java_lang_String::is_latin1(s);
3295 if (isCopy != NULL) {
3296 *isCopy = is_latin1 ? JNI_TRUE : JNI_FALSE;
3297 }
3298 jchar* ret;
3299 if (!is_latin1) {
3300 ret = (jchar*) s_value->base(T_CHAR);
3301 } else {
3302 // Inflate latin1 encoded string to UTF16
3303 int s_len = java_lang_String::length(s, s_value);
3304 ret = NEW_C_HEAP_ARRAY_RETURN_NULL(jchar, s_len + 1, mtInternal); // add one for zero termination
3305 /* JNI Specification states return NULL on OOM */
3306 if (ret != NULL) {
3307 for (int i = 0; i < s_len; i++) {
3308 ret[i] = ((jchar) s_value->byte_at(i)) & 0xff;
3309 }
3310 ret[s_len] = 0;
3311 }
3312 }
3313 HOTSPOT_JNI_GETSTRINGCRITICAL_RETURN((uint16_t *) ret);
3314 return ret;
3315 JNI_END
3316
3317
3318 JNI_ENTRY(void, jni_ReleaseStringCritical(JNIEnv *env, jstring str, const jchar *chars))
3319 JNIWrapper("ReleaseStringCritical");
3320 HOTSPOT_JNI_RELEASESTRINGCRITICAL_ENTRY(env, str, (uint16_t *) chars);
3321 // The str and chars arguments are ignored for UTF16 strings
3322 oop s = JNIHandles::resolve_non_null(str);
3323 bool is_latin1 = java_lang_String::is_latin1(s);
3324 if (is_latin1) {
3325 // For latin1 string, free jchar array allocated by earlier call to GetStringCritical.
3326 // This assumes that ReleaseStringCritical bookends GetStringCritical.
3327 FREE_C_HEAP_ARRAY(jchar, chars);
3328 }
3329 unlock_gc_or_unpin_object(thread, str);
3330 HOTSPOT_JNI_RELEASESTRINGCRITICAL_RETURN();
3331 JNI_END
3332
3333
3334 JNI_ENTRY(jweak, jni_NewWeakGlobalRef(JNIEnv *env, jobject ref))
3335 JNIWrapper("jni_NewWeakGlobalRef");
3336 HOTSPOT_JNI_NEWWEAKGLOBALREF_ENTRY(env, ref);
3337 Handle ref_handle(thread, JNIHandles::resolve(ref));
3338 jweak ret = JNIHandles::make_weak_global(ref_handle);
3339 HOTSPOT_JNI_NEWWEAKGLOBALREF_RETURN(ret);
3340 return ret;
3341 JNI_END
3342
3343 // Must be JNI_ENTRY (with HandleMark)
3344 JNI_ENTRY(void, jni_DeleteWeakGlobalRef(JNIEnv *env, jweak ref))
3345 JNIWrapper("jni_DeleteWeakGlobalRef");
3346 HOTSPOT_JNI_DELETEWEAKGLOBALREF_ENTRY(env, ref);
3347 JNIHandles::destroy_weak_global(ref);
3348 HOTSPOT_JNI_DELETEWEAKGLOBALREF_RETURN();
3349 JNI_END
3350
3351
3352 JNI_ENTRY_NO_PRESERVE(jboolean, jni_ExceptionCheck(JNIEnv *env))
3353 JNIWrapper("jni_ExceptionCheck");
3354 HOTSPOT_JNI_EXCEPTIONCHECK_ENTRY(env);
3355 jni_check_async_exceptions(thread);
3356 jboolean ret = (thread->has_pending_exception()) ? JNI_TRUE : JNI_FALSE;
3357 HOTSPOT_JNI_EXCEPTIONCHECK_RETURN(ret);
3358 return ret;
3359 JNI_END
3360
3361
3362 // Initialization state for three routines below relating to
3363 // java.nio.DirectBuffers
3364 static int directBufferSupportInitializeStarted = 0;
3365 static volatile int directBufferSupportInitializeEnded = 0;
3366 static volatile int directBufferSupportInitializeFailed = 0;
3367 static jclass bufferClass = NULL;
3368 static jclass directBufferClass = NULL;
3369 static jclass directByteBufferClass = NULL;
3370 static jmethodID directByteBufferConstructor = NULL;
3371 static jfieldID directBufferAddressField = NULL;
3372 static jfieldID bufferCapacityField = NULL;
3373
3374 static jclass lookupOne(JNIEnv* env, const char* name, TRAPS) {
3375 Handle loader; // null (bootstrap) loader
3376 Handle protection_domain; // null protection domain
3377
3378 TempNewSymbol sym = SymbolTable::new_symbol(name);
3379 jclass result = find_class_from_class_loader(env, sym, true, true, loader, protection_domain, true, CHECK_NULL);
3380
3381 if (log_is_enabled(Debug, class, resolve) && result != NULL) {
3382 trace_class_resolution(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(result)));
3383 }
3384 return result;
3385 }
3386
3387 // These lookups are done with the NULL (bootstrap) ClassLoader to
3388 // circumvent any security checks that would be done by jni_FindClass.
3389 JNI_ENTRY(bool, lookupDirectBufferClasses(JNIEnv* env))
3390 {
3391 if ((bufferClass = lookupOne(env, "java/nio/Buffer", thread)) == NULL) { return false; }
3392 if ((directBufferClass = lookupOne(env, "sun/nio/ch/DirectBuffer", thread)) == NULL) { return false; }
3393 if ((directByteBufferClass = lookupOne(env, "java/nio/DirectByteBuffer", thread)) == NULL) { return false; }
3394 return true;
3395 }
3396 JNI_END
3397
3398
3399 static bool initializeDirectBufferSupport(JNIEnv* env, JavaThread* thread) {
3400 if (directBufferSupportInitializeFailed) {
3401 return false;
3402 }
3403
3404 if (Atomic::cmpxchg(1, &directBufferSupportInitializeStarted, 0) == 0) {
3405 if (!lookupDirectBufferClasses(env)) {
3406 directBufferSupportInitializeFailed = 1;
3407 return false;
3408 }
3409
3410 // Make global references for these
3411 bufferClass = (jclass) env->NewGlobalRef(bufferClass);
3412 directBufferClass = (jclass) env->NewGlobalRef(directBufferClass);
3413 directByteBufferClass = (jclass) env->NewGlobalRef(directByteBufferClass);
3414
3415 // Get needed field and method IDs
3416 directByteBufferConstructor = env->GetMethodID(directByteBufferClass, "<init>", "(JI)V");
3417 if (env->ExceptionCheck()) {
3418 env->ExceptionClear();
3419 directBufferSupportInitializeFailed = 1;
3420 return false;
3421 }
3422 directBufferAddressField = env->GetFieldID(bufferClass, "address", "J");
3423 if (env->ExceptionCheck()) {
3424 env->ExceptionClear();
3425 directBufferSupportInitializeFailed = 1;
3426 return false;
3427 }
3428 bufferCapacityField = env->GetFieldID(bufferClass, "capacity", "I");
3429 if (env->ExceptionCheck()) {
3430 env->ExceptionClear();
3431 directBufferSupportInitializeFailed = 1;
3432 return false;
3433 }
3434
3435 if ((directByteBufferConstructor == NULL) ||
3436 (directBufferAddressField == NULL) ||
3437 (bufferCapacityField == NULL)) {
3438 directBufferSupportInitializeFailed = 1;
3439 return false;
3440 }
3441
3442 directBufferSupportInitializeEnded = 1;
3443 } else {
3444 while (!directBufferSupportInitializeEnded && !directBufferSupportInitializeFailed) {
3445 os::naked_yield();
3446 }
3447 }
3448
3449 return !directBufferSupportInitializeFailed;
3450 }
3451
3452 extern "C" jobject JNICALL jni_NewDirectByteBuffer(JNIEnv *env, void* address, jlong capacity)
3453 {
3454 // thread_from_jni_environment() will block if VM is gone.
3455 JavaThread* thread = JavaThread::thread_from_jni_environment(env);
3456
3457 JNIWrapper("jni_NewDirectByteBuffer");
3458 HOTSPOT_JNI_NEWDIRECTBYTEBUFFER_ENTRY(env, address, capacity);
3459
3460 if (!directBufferSupportInitializeEnded) {
3461 if (!initializeDirectBufferSupport(env, thread)) {
3462 HOTSPOT_JNI_NEWDIRECTBYTEBUFFER_RETURN(NULL);
3463 return NULL;
3464 }
3465 }
3466
3467 // Being paranoid about accidental sign extension on address
3468 jlong addr = (jlong) ((uintptr_t) address);
3469 // NOTE that package-private DirectByteBuffer constructor currently
3470 // takes int capacity
3471 jint cap = (jint) capacity;
3472 jobject ret = env->NewObject(directByteBufferClass, directByteBufferConstructor, addr, cap);
3473 HOTSPOT_JNI_NEWDIRECTBYTEBUFFER_RETURN(ret);
3474 return ret;
3475 }
3476
3477 DT_RETURN_MARK_DECL(GetDirectBufferAddress, void*
3478 , HOTSPOT_JNI_GETDIRECTBUFFERADDRESS_RETURN((void*) _ret_ref));
3479
3480 extern "C" void* JNICALL jni_GetDirectBufferAddress(JNIEnv *env, jobject buf)
3481 {
3482 // thread_from_jni_environment() will block if VM is gone.
3483 JavaThread* thread = JavaThread::thread_from_jni_environment(env);
3484
3485 JNIWrapper("jni_GetDirectBufferAddress");
3486 HOTSPOT_JNI_GETDIRECTBUFFERADDRESS_ENTRY(env, buf);
3487 void* ret = NULL;
3488 DT_RETURN_MARK(GetDirectBufferAddress, void*, (const void*&)ret);
3489
3490 if (!directBufferSupportInitializeEnded) {
3491 if (!initializeDirectBufferSupport(env, thread)) {
3492 return 0;
3493 }
3494 }
3495
3496 if ((buf != NULL) && (!env->IsInstanceOf(buf, directBufferClass))) {
3497 return 0;
3498 }
3499
3500 ret = (void*)(intptr_t)env->GetLongField(buf, directBufferAddressField);
3501 return ret;
3502 }
3503
3504 DT_RETURN_MARK_DECL(GetDirectBufferCapacity, jlong
3505 , HOTSPOT_JNI_GETDIRECTBUFFERCAPACITY_RETURN(_ret_ref));
3506
3507 extern "C" jlong JNICALL jni_GetDirectBufferCapacity(JNIEnv *env, jobject buf)
3508 {
3509 // thread_from_jni_environment() will block if VM is gone.
3510 JavaThread* thread = JavaThread::thread_from_jni_environment(env);
3511
3512 JNIWrapper("jni_GetDirectBufferCapacity");
3513 HOTSPOT_JNI_GETDIRECTBUFFERCAPACITY_ENTRY(env, buf);
3514 jlong ret = -1;
3515 DT_RETURN_MARK(GetDirectBufferCapacity, jlong, (const jlong&)ret);
3516
3517 if (!directBufferSupportInitializeEnded) {
3518 if (!initializeDirectBufferSupport(env, thread)) {
3519 ret = 0;
3520 return ret;
3521 }
3522 }
3523
3524 if (buf == NULL) {
3525 return -1;
3526 }
3527
3528 if (!env->IsInstanceOf(buf, directBufferClass)) {
3529 return -1;
3530 }
3531
3532 // NOTE that capacity is currently an int in the implementation
3533 ret = env->GetIntField(buf, bufferCapacityField);
3534 return ret;
3535 }
3536
3537
3538 JNI_LEAF(jint, jni_GetVersion(JNIEnv *env))
3539 JNIWrapper("GetVersion");
3540 HOTSPOT_JNI_GETVERSION_ENTRY(env);
3541 HOTSPOT_JNI_GETVERSION_RETURN(CurrentVersion);
3542 return CurrentVersion;
3543 JNI_END
3544
3545 extern struct JavaVM_ main_vm;
3546
3547 JNI_LEAF(jint, jni_GetJavaVM(JNIEnv *env, JavaVM **vm))
3548 JNIWrapper("jni_GetJavaVM");
3549 HOTSPOT_JNI_GETJAVAVM_ENTRY(env, (void **) vm);
3550 *vm = (JavaVM *)(&main_vm);
3551 HOTSPOT_JNI_GETJAVAVM_RETURN(JNI_OK);
3552 return JNI_OK;
3553 JNI_END
3554
3555
3556 JNI_ENTRY(jobject, jni_GetModule(JNIEnv* env, jclass clazz))
3557 JNIWrapper("GetModule");
3558 return Modules::get_module(clazz, THREAD);
3559 JNI_END
3560
3561
3562 // Structure containing all jni functions
3563 struct JNINativeInterface_ jni_NativeInterface = {
3564 NULL,
3565 NULL,
3566 NULL,
3567
3568 NULL,
3569
3570 jni_GetVersion,
3571
3572 jni_DefineClass,
3573 jni_FindClass,
3574
3575 jni_FromReflectedMethod,
3576 jni_FromReflectedField,
3577
3578 jni_ToReflectedMethod,
3579
3580 jni_GetSuperclass,
3581 jni_IsAssignableFrom,
3582
3583 jni_ToReflectedField,
3584
3585 jni_Throw,
3586 jni_ThrowNew,
3587 jni_ExceptionOccurred,
3588 jni_ExceptionDescribe,
3589 jni_ExceptionClear,
3590 jni_FatalError,
3591
3592 jni_PushLocalFrame,
3593 jni_PopLocalFrame,
3594
3595 jni_NewGlobalRef,
3596 jni_DeleteGlobalRef,
3597 jni_DeleteLocalRef,
3598 jni_IsSameObject,
3599
3600 jni_NewLocalRef,
3601 jni_EnsureLocalCapacity,
3602
3603 jni_AllocObject,
3604 jni_NewObject,
3605 jni_NewObjectV,
3606 jni_NewObjectA,
3607
3608 jni_GetObjectClass,
3609 jni_IsInstanceOf,
3610
3611 jni_GetMethodID,
3612
3613 jni_CallObjectMethod,
3614 jni_CallObjectMethodV,
3615 jni_CallObjectMethodA,
3616 jni_CallBooleanMethod,
3617 jni_CallBooleanMethodV,
3618 jni_CallBooleanMethodA,
3619 jni_CallByteMethod,
3620 jni_CallByteMethodV,
3621 jni_CallByteMethodA,
3622 jni_CallCharMethod,
3623 jni_CallCharMethodV,
3624 jni_CallCharMethodA,
3625 jni_CallShortMethod,
3626 jni_CallShortMethodV,
3627 jni_CallShortMethodA,
3628 jni_CallIntMethod,
3629 jni_CallIntMethodV,
3630 jni_CallIntMethodA,
3631 jni_CallLongMethod,
3632 jni_CallLongMethodV,
3633 jni_CallLongMethodA,
3634 jni_CallFloatMethod,
3635 jni_CallFloatMethodV,
3636 jni_CallFloatMethodA,
3637 jni_CallDoubleMethod,
3638 jni_CallDoubleMethodV,
3639 jni_CallDoubleMethodA,
3640 jni_CallVoidMethod,
3641 jni_CallVoidMethodV,
3642 jni_CallVoidMethodA,
3643
3644 jni_CallNonvirtualObjectMethod,
3645 jni_CallNonvirtualObjectMethodV,
3646 jni_CallNonvirtualObjectMethodA,
3647 jni_CallNonvirtualBooleanMethod,
3648 jni_CallNonvirtualBooleanMethodV,
3649 jni_CallNonvirtualBooleanMethodA,
3650 jni_CallNonvirtualByteMethod,
3651 jni_CallNonvirtualByteMethodV,
3652 jni_CallNonvirtualByteMethodA,
3653 jni_CallNonvirtualCharMethod,
3654 jni_CallNonvirtualCharMethodV,
3655 jni_CallNonvirtualCharMethodA,
3656 jni_CallNonvirtualShortMethod,
3657 jni_CallNonvirtualShortMethodV,
3658 jni_CallNonvirtualShortMethodA,
3659 jni_CallNonvirtualIntMethod,
3660 jni_CallNonvirtualIntMethodV,
3661 jni_CallNonvirtualIntMethodA,
3662 jni_CallNonvirtualLongMethod,
3663 jni_CallNonvirtualLongMethodV,
3664 jni_CallNonvirtualLongMethodA,
3665 jni_CallNonvirtualFloatMethod,
3666 jni_CallNonvirtualFloatMethodV,
3667 jni_CallNonvirtualFloatMethodA,
3668 jni_CallNonvirtualDoubleMethod,
3669 jni_CallNonvirtualDoubleMethodV,
3670 jni_CallNonvirtualDoubleMethodA,
3671 jni_CallNonvirtualVoidMethod,
3672 jni_CallNonvirtualVoidMethodV,
3673 jni_CallNonvirtualVoidMethodA,
3674
3675 jni_GetFieldID,
3676
3677 jni_GetObjectField,
3678 jni_GetBooleanField,
3679 jni_GetByteField,
3680 jni_GetCharField,
3681 jni_GetShortField,
3682 jni_GetIntField,
3683 jni_GetLongField,
3684 jni_GetFloatField,
3685 jni_GetDoubleField,
3686
3687 jni_SetObjectField,
3688 jni_SetBooleanField,
3689 jni_SetByteField,
3690 jni_SetCharField,
3691 jni_SetShortField,
3692 jni_SetIntField,
3693 jni_SetLongField,
3694 jni_SetFloatField,
3695 jni_SetDoubleField,
3696
3697 jni_GetStaticMethodID,
3698
3699 jni_CallStaticObjectMethod,
3700 jni_CallStaticObjectMethodV,
3701 jni_CallStaticObjectMethodA,
3702 jni_CallStaticBooleanMethod,
3703 jni_CallStaticBooleanMethodV,
3704 jni_CallStaticBooleanMethodA,
3705 jni_CallStaticByteMethod,
3706 jni_CallStaticByteMethodV,
3707 jni_CallStaticByteMethodA,
3708 jni_CallStaticCharMethod,
3709 jni_CallStaticCharMethodV,
3710 jni_CallStaticCharMethodA,
3711 jni_CallStaticShortMethod,
3712 jni_CallStaticShortMethodV,
3713 jni_CallStaticShortMethodA,
3714 jni_CallStaticIntMethod,
3715 jni_CallStaticIntMethodV,
3716 jni_CallStaticIntMethodA,
3717 jni_CallStaticLongMethod,
3718 jni_CallStaticLongMethodV,
3719 jni_CallStaticLongMethodA,
3720 jni_CallStaticFloatMethod,
3721 jni_CallStaticFloatMethodV,
3722 jni_CallStaticFloatMethodA,
3723 jni_CallStaticDoubleMethod,
3724 jni_CallStaticDoubleMethodV,
3725 jni_CallStaticDoubleMethodA,
3726 jni_CallStaticVoidMethod,
3727 jni_CallStaticVoidMethodV,
3728 jni_CallStaticVoidMethodA,
3729
3730 jni_GetStaticFieldID,
3731
3732 jni_GetStaticObjectField,
3733 jni_GetStaticBooleanField,
3734 jni_GetStaticByteField,
3735 jni_GetStaticCharField,
3736 jni_GetStaticShortField,
3737 jni_GetStaticIntField,
3738 jni_GetStaticLongField,
3739 jni_GetStaticFloatField,
3740 jni_GetStaticDoubleField,
3741
3742 jni_SetStaticObjectField,
3743 jni_SetStaticBooleanField,
3744 jni_SetStaticByteField,
3745 jni_SetStaticCharField,
3746 jni_SetStaticShortField,
3747 jni_SetStaticIntField,
3748 jni_SetStaticLongField,
3749 jni_SetStaticFloatField,
3750 jni_SetStaticDoubleField,
3751
3752 jni_NewString,
3753 jni_GetStringLength,
3754 jni_GetStringChars,
3755 jni_ReleaseStringChars,
3756
3757 jni_NewStringUTF,
3758 jni_GetStringUTFLength,
3759 jni_GetStringUTFChars,
3760 jni_ReleaseStringUTFChars,
3761
3762 jni_GetArrayLength,
3763
3764 jni_NewObjectArray,
3765 jni_GetObjectArrayElement,
3766 jni_SetObjectArrayElement,
3767
3768 jni_NewBooleanArray,
3769 jni_NewByteArray,
3770 jni_NewCharArray,
3771 jni_NewShortArray,
3772 jni_NewIntArray,
3773 jni_NewLongArray,
3774 jni_NewFloatArray,
3775 jni_NewDoubleArray,
3776
3777 jni_GetBooleanArrayElements,
3778 jni_GetByteArrayElements,
3779 jni_GetCharArrayElements,
3780 jni_GetShortArrayElements,
3781 jni_GetIntArrayElements,
3782 jni_GetLongArrayElements,
3783 jni_GetFloatArrayElements,
3784 jni_GetDoubleArrayElements,
3785
3786 jni_ReleaseBooleanArrayElements,
3787 jni_ReleaseByteArrayElements,
3788 jni_ReleaseCharArrayElements,
3789 jni_ReleaseShortArrayElements,
3790 jni_ReleaseIntArrayElements,
3791 jni_ReleaseLongArrayElements,
3792 jni_ReleaseFloatArrayElements,
3793 jni_ReleaseDoubleArrayElements,
3794
3795 jni_GetBooleanArrayRegion,
3796 jni_GetByteArrayRegion,
3797 jni_GetCharArrayRegion,
3798 jni_GetShortArrayRegion,
3799 jni_GetIntArrayRegion,
3800 jni_GetLongArrayRegion,
3801 jni_GetFloatArrayRegion,
3802 jni_GetDoubleArrayRegion,
3803
3804 jni_SetBooleanArrayRegion,
3805 jni_SetByteArrayRegion,
3806 jni_SetCharArrayRegion,
3807 jni_SetShortArrayRegion,
3808 jni_SetIntArrayRegion,
3809 jni_SetLongArrayRegion,
3810 jni_SetFloatArrayRegion,
3811 jni_SetDoubleArrayRegion,
3812
3813 jni_RegisterNatives,
3814 jni_UnregisterNatives,
3815
3816 jni_MonitorEnter,
3817 jni_MonitorExit,
3818
3819 jni_GetJavaVM,
3820
3821 jni_GetStringRegion,
3822 jni_GetStringUTFRegion,
3823
3824 jni_GetPrimitiveArrayCritical,
3825 jni_ReleasePrimitiveArrayCritical,
3826
3827 jni_GetStringCritical,
3828 jni_ReleaseStringCritical,
3829
3830 jni_NewWeakGlobalRef,
3831 jni_DeleteWeakGlobalRef,
3832
3833 jni_ExceptionCheck,
3834
3835 jni_NewDirectByteBuffer,
3836 jni_GetDirectBufferAddress,
3837 jni_GetDirectBufferCapacity,
3838
3839 // New 1_6 features
3840
3841 jni_GetObjectRefType,
3842
3843 // Module features
3844
3845 jni_GetModule
3846 };
3847
3848
3849 // For jvmti use to modify jni function table.
3850 // Java threads in native contiues to run until it is transitioned
3851 // to VM at safepoint. Before the transition or before it is blocked
3852 // for safepoint it may access jni function table. VM could crash if
3853 // any java thread access the jni function table in the middle of memcpy.
3854 // To avoid this each function pointers are copied automically.
3855 void copy_jni_function_table(const struct JNINativeInterface_ *new_jni_NativeInterface) {
3856 assert(SafepointSynchronize::is_at_safepoint(), "must be at safepoint");
3857 intptr_t *a = (intptr_t *) jni_functions();
3858 intptr_t *b = (intptr_t *) new_jni_NativeInterface;
3859 for (uint i=0; i < sizeof(struct JNINativeInterface_)/sizeof(void *); i++) {
3860 Atomic::store(*b++, a++);
3861 }
3862 }
3863
3864 void quicken_jni_functions() {
3865 // Replace Get<Primitive>Field with fast versions
3866 if (UseFastJNIAccessors && !VerifyJNIFields && !CountJNICalls && !CheckJNICalls) {
3867 address func;
3868 func = JNI_FastGetField::generate_fast_get_boolean_field();
3869 if (func != (address)-1) {
3870 jni_NativeInterface.GetBooleanField = (GetBooleanField_t)func;
3871 }
3872 func = JNI_FastGetField::generate_fast_get_byte_field();
3873 if (func != (address)-1) {
3874 jni_NativeInterface.GetByteField = (GetByteField_t)func;
3875 }
3876 func = JNI_FastGetField::generate_fast_get_char_field();
3877 if (func != (address)-1) {
3878 jni_NativeInterface.GetCharField = (GetCharField_t)func;
3879 }
3880 func = JNI_FastGetField::generate_fast_get_short_field();
3881 if (func != (address)-1) {
3882 jni_NativeInterface.GetShortField = (GetShortField_t)func;
3883 }
3884 func = JNI_FastGetField::generate_fast_get_int_field();
3885 if (func != (address)-1) {
3886 jni_NativeInterface.GetIntField = (GetIntField_t)func;
3887 }
3888 func = JNI_FastGetField::generate_fast_get_long_field();
3889 if (func != (address)-1) {
3890 jni_NativeInterface.GetLongField = (GetLongField_t)func;
3891 }
3892 func = JNI_FastGetField::generate_fast_get_float_field();
3893 if (func != (address)-1) {
3894 jni_NativeInterface.GetFloatField = (GetFloatField_t)func;
3895 }
3896 func = JNI_FastGetField::generate_fast_get_double_field();
3897 if (func != (address)-1) {
3898 jni_NativeInterface.GetDoubleField = (GetDoubleField_t)func;
3899 }
3900 }
3901 }
3902
3903 // Returns the function structure
3904 struct JNINativeInterface_* jni_functions() {
3905 #if INCLUDE_JNI_CHECK
3906 if (CheckJNICalls) return jni_functions_check();
3907 #endif // INCLUDE_JNI_CHECK
3908 return &jni_NativeInterface;
3909 }
3910
3911 // Returns the function structure
3912 struct JNINativeInterface_* jni_functions_nocheck() {
3913 return &jni_NativeInterface;
3914 }
3915
3916 static void post_thread_start_event(const JavaThread* jt) {
3917 assert(jt != NULL, "invariant");
3918 EventThreadStart event;
3919 if (event.should_commit()) {
3920 event.set_thread(JFR_THREAD_ID(jt));
3921 event.commit();
3922 }
3923 }
3924
3925 // Invocation API
3926
3927
3928 // Forward declaration
3929 extern const struct JNIInvokeInterface_ jni_InvokeInterface;
3930
3931 // Global invocation API vars
3932 volatile int vm_created = 0;
3933 // Indicate whether it is safe to recreate VM
3934 volatile int safe_to_recreate_vm = 1;
3935 struct JavaVM_ main_vm = {&jni_InvokeInterface};
3936
3937
3938 #define JAVASTACKSIZE (400 * 1024) /* Default size of a thread java stack */
3939 enum { VERIFY_NONE, VERIFY_REMOTE, VERIFY_ALL };
3940
3941 DT_RETURN_MARK_DECL(GetDefaultJavaVMInitArgs, jint
3942 , HOTSPOT_JNI_GETDEFAULTJAVAVMINITARGS_RETURN(_ret_ref));
3943
3944 _JNI_IMPORT_OR_EXPORT_ jint JNICALL JNI_GetDefaultJavaVMInitArgs(void *args_) {
3945 HOTSPOT_JNI_GETDEFAULTJAVAVMINITARGS_ENTRY(args_);
3946 JDK1_1InitArgs *args = (JDK1_1InitArgs *)args_;
3947 jint ret = JNI_ERR;
3948 DT_RETURN_MARK(GetDefaultJavaVMInitArgs, jint, (const jint&)ret);
3949
3950 if (Threads::is_supported_jni_version(args->version)) {
3951 ret = JNI_OK;
3952 }
3953 // 1.1 style no longer supported in hotspot.
3954 // According the JNI spec, we should update args->version on return.
3955 // We also use the structure to communicate with launcher about default
3956 // stack size.
3957 if (args->version == JNI_VERSION_1_1) {
3958 args->version = JNI_VERSION_1_2;
3959 // javaStackSize is int in arguments structure
3960 assert(jlong(ThreadStackSize) * K < INT_MAX, "integer overflow");
3961 args->javaStackSize = (jint)(ThreadStackSize * K);
3962 }
3963 return ret;
3964 }
3965
3966 DT_RETURN_MARK_DECL(CreateJavaVM, jint
3967 , HOTSPOT_JNI_CREATEJAVAVM_RETURN(_ret_ref));
3968
3969 static jint JNI_CreateJavaVM_inner(JavaVM **vm, void **penv, void *args) {
3970 HOTSPOT_JNI_CREATEJAVAVM_ENTRY((void **) vm, penv, args);
3971
3972 jint result = JNI_ERR;
3973 DT_RETURN_MARK(CreateJavaVM, jint, (const jint&)result);
3974
3975 // We're about to use Atomic::xchg for synchronization. Some Zero
3976 // platforms use the GCC builtin __sync_lock_test_and_set for this,
3977 // but __sync_lock_test_and_set is not guaranteed to do what we want
3978 // on all architectures. So we check it works before relying on it.
3979 #if defined(ZERO) && defined(ASSERT)
3980 {
3981 jint a = 0xcafebabe;
3982 jint b = Atomic::xchg((jint) 0xdeadbeef, &a);
3983 void *c = &a;
3984 void *d = Atomic::xchg(&b, &c);
3985 assert(a == (jint) 0xdeadbeef && b == (jint) 0xcafebabe, "Atomic::xchg() works");
3986 assert(c == &b && d == &a, "Atomic::xchg() works");
3987 }
3988 #endif // ZERO && ASSERT
3989
3990 // At the moment it's only possible to have one Java VM,
3991 // since some of the runtime state is in global variables.
3992
3993 // We cannot use our mutex locks here, since they only work on
3994 // Threads. We do an atomic compare and exchange to ensure only
3995 // one thread can call this method at a time
3996
3997 // We use Atomic::xchg rather than Atomic::add/dec since on some platforms
3998 // the add/dec implementations are dependent on whether we are running
3999 // on a multiprocessor Atomic::xchg does not have this problem.
4000 if (Atomic::xchg(1, &vm_created) == 1) {
4001 return JNI_EEXIST; // already created, or create attempt in progress
4002 }
4003 if (Atomic::xchg(0, &safe_to_recreate_vm) == 0) {
4004 return JNI_ERR; // someone tried and failed and retry not allowed.
4005 }
4006
4007 assert(vm_created == 1, "vm_created is true during the creation");
4008
4009 /**
4010 * Certain errors during initialization are recoverable and do not
4011 * prevent this method from being called again at a later time
4012 * (perhaps with different arguments). However, at a certain
4013 * point during initialization if an error occurs we cannot allow
4014 * this function to be called again (or it will crash). In those
4015 * situations, the 'canTryAgain' flag is set to false, which atomically
4016 * sets safe_to_recreate_vm to 1, such that any new call to
4017 * JNI_CreateJavaVM will immediately fail using the above logic.
4018 */
4019 bool can_try_again = true;
4020
4021 result = Threads::create_vm((JavaVMInitArgs*) args, &can_try_again);
4022 if (result == JNI_OK) {
4023 JavaThread *thread = JavaThread::current();
4024 assert(!thread->has_pending_exception(), "should have returned not OK");
4025 /* thread is thread_in_vm here */
4026 *vm = (JavaVM *)(&main_vm);
4027 *(JNIEnv**)penv = thread->jni_environment();
4028
4029 #if INCLUDE_JVMCI
4030 if (EnableJVMCI) {
4031 if (UseJVMCICompiler) {
4032 // JVMCI is initialized on a CompilerThread
4033 if (BootstrapJVMCI) {
4034 JavaThread* THREAD = thread;
4035 JVMCICompiler* compiler = JVMCICompiler::instance(true, CATCH);
4036 compiler->bootstrap(THREAD);
4037 if (HAS_PENDING_EXCEPTION) {
4038 HandleMark hm;
4039 vm_exit_during_initialization(Handle(THREAD, PENDING_EXCEPTION));
4040 }
4041 }
4042 }
4043 }
4044 #endif
4045
4046 // Notify JVMTI
4047 if (JvmtiExport::should_post_thread_life()) {
4048 JvmtiExport::post_thread_start(thread);
4049 }
4050
4051 post_thread_start_event(thread);
4052
4053 #ifndef PRODUCT
4054 if (ReplayCompiles) ciReplay::replay(thread);
4055
4056 // Some platforms (like Win*) need a wrapper around these test
4057 // functions in order to properly handle error conditions.
4058 VMError::test_error_handler();
4059 #endif
4060
4061 // Since this is not a JVM_ENTRY we have to set the thread state manually before leaving.
4062 ThreadStateTransition::transition(thread, _thread_in_vm, _thread_in_native);
4063 } else {
4064 // If create_vm exits because of a pending exception, exit with that
4065 // exception. In the future when we figure out how to reclaim memory,
4066 // we may be able to exit with JNI_ERR and allow the calling application
4067 // to continue.
4068 if (Universe::is_fully_initialized()) {
4069 // otherwise no pending exception possible - VM will already have aborted
4070 JavaThread* THREAD = JavaThread::current();
4071 if (HAS_PENDING_EXCEPTION) {
4072 HandleMark hm;
4073 vm_exit_during_initialization(Handle(THREAD, PENDING_EXCEPTION));
4074 }
4075 }
4076
4077 if (can_try_again) {
4078 // reset safe_to_recreate_vm to 1 so that retrial would be possible
4079 safe_to_recreate_vm = 1;
4080 }
4081
4082 // Creation failed. We must reset vm_created
4083 *vm = 0;
4084 *(JNIEnv**)penv = 0;
4085 // reset vm_created last to avoid race condition. Use OrderAccess to
4086 // control both compiler and architectural-based reordering.
4087 OrderAccess::release_store(&vm_created, 0);
4088 }
4089
4090 // Flush stdout and stderr before exit.
4091 fflush(stdout);
4092 fflush(stderr);
4093
4094 return result;
4095
4096 }
4097
4098 _JNI_IMPORT_OR_EXPORT_ jint JNICALL JNI_CreateJavaVM(JavaVM **vm, void **penv, void *args) {
4099 jint result = JNI_ERR;
4100 // On Windows, let CreateJavaVM run with SEH protection
4101 #ifdef _WIN32
4102 __try {
4103 #endif
4104 result = JNI_CreateJavaVM_inner(vm, penv, args);
4105 #ifdef _WIN32
4106 } __except(topLevelExceptionFilter((_EXCEPTION_POINTERS*)_exception_info())) {
4107 // Nothing to do.
4108 }
4109 #endif
4110 return result;
4111 }
4112
4113 _JNI_IMPORT_OR_EXPORT_ jint JNICALL JNI_GetCreatedJavaVMs(JavaVM **vm_buf, jsize bufLen, jsize *numVMs) {
4114 // See bug 4367188, the wrapper can sometimes cause VM crashes
4115 // JNIWrapper("GetCreatedJavaVMs");
4116
4117 HOTSPOT_JNI_GETCREATEDJAVAVMS_ENTRY((void **) vm_buf, bufLen, (uintptr_t *) numVMs);
4118
4119 if (vm_created == 1) {
4120 if (numVMs != NULL) *numVMs = 1;
4121 if (bufLen > 0) *vm_buf = (JavaVM *)(&main_vm);
4122 } else {
4123 if (numVMs != NULL) *numVMs = 0;
4124 }
4125 HOTSPOT_JNI_GETCREATEDJAVAVMS_RETURN(JNI_OK);
4126 return JNI_OK;
4127 }
4128
4129 extern "C" {
4130
4131 DT_RETURN_MARK_DECL(DestroyJavaVM, jint
4132 , HOTSPOT_JNI_DESTROYJAVAVM_RETURN(_ret_ref));
4133
4134 static jint JNICALL jni_DestroyJavaVM_inner(JavaVM *vm) {
4135 HOTSPOT_JNI_DESTROYJAVAVM_ENTRY(vm);
4136 jint res = JNI_ERR;
4137 DT_RETURN_MARK(DestroyJavaVM, jint, (const jint&)res);
4138
4139 if (vm_created == 0) {
4140 res = JNI_ERR;
4141 return res;
4142 }
4143
4144 JNIWrapper("DestroyJavaVM");
4145 JNIEnv *env;
4146 JavaVMAttachArgs destroyargs;
4147 destroyargs.version = CurrentVersion;
4148 destroyargs.name = (char *)"DestroyJavaVM";
4149 destroyargs.group = NULL;
4150 res = vm->AttachCurrentThread((void **)&env, (void *)&destroyargs);
4151 if (res != JNI_OK) {
4152 return res;
4153 }
4154
4155 // Since this is not a JVM_ENTRY we have to set the thread state manually before entering.
4156 JavaThread* thread = JavaThread::current();
4157 ThreadStateTransition::transition_from_native(thread, _thread_in_vm);
4158 if (Threads::destroy_vm()) {
4159 // Should not change thread state, VM is gone
4160 vm_created = 0;
4161 res = JNI_OK;
4162 return res;
4163 } else {
4164 ThreadStateTransition::transition(thread, _thread_in_vm, _thread_in_native);
4165 res = JNI_ERR;
4166 return res;
4167 }
4168 }
4169
4170 jint JNICALL jni_DestroyJavaVM(JavaVM *vm) {
4171 jint result = JNI_ERR;
4172 // On Windows, we need SEH protection
4173 #ifdef _WIN32
4174 __try {
4175 #endif
4176 result = jni_DestroyJavaVM_inner(vm);
4177 #ifdef _WIN32
4178 } __except(topLevelExceptionFilter((_EXCEPTION_POINTERS*)_exception_info())) {
4179 // Nothing to do.
4180 }
4181 #endif
4182 return result;
4183 }
4184
4185 static jint attach_current_thread(JavaVM *vm, void **penv, void *_args, bool daemon) {
4186 JavaVMAttachArgs *args = (JavaVMAttachArgs *) _args;
4187
4188 // Check below commented out from JDK1.2fcs as well
4189 /*
4190 if (args && (args->version != JNI_VERSION_1_1 || args->version != JNI_VERSION_1_2)) {
4191 return JNI_EVERSION;
4192 }
4193 */
4194
4195 Thread* t = Thread::current_or_null();
4196 if (t != NULL) {
4197 // If the thread has been attached this operation is a no-op
4198 *(JNIEnv**)penv = ((JavaThread*) t)->jni_environment();
4199 return JNI_OK;
4200 }
4201
4202 // Create a thread and mark it as attaching so it will be skipped by the
4203 // ThreadsListEnumerator - see CR 6404306
4204 JavaThread* thread = new JavaThread(true);
4205
4206 // Set correct safepoint info. The thread is going to call into Java when
4207 // initializing the Java level thread object. Hence, the correct state must
4208 // be set in order for the Safepoint code to deal with it correctly.
4209 thread->set_thread_state(_thread_in_vm);
4210 thread->record_stack_base_and_size();
4211 thread->register_thread_stack_with_NMT();
4212 thread->initialize_thread_current();
4213
4214 if (!os::create_attached_thread(thread)) {
4215 thread->smr_delete();
4216 return JNI_ERR;
4217 }
4218 // Enable stack overflow checks
4219 thread->create_stack_guard_pages();
4220
4221 thread->initialize_tlab();
4222
4223 thread->cache_global_variables();
4224
4225 // This thread will not do a safepoint check, since it has
4226 // not been added to the Thread list yet.
4227 { MutexLocker ml(Threads_lock);
4228 // This must be inside this lock in order to get FullGCALot to work properly, i.e., to
4229 // avoid this thread trying to do a GC before it is added to the thread-list
4230 thread->set_active_handles(JNIHandleBlock::allocate_block());
4231 Threads::add(thread, daemon);
4232 }
4233 // Create thread group and name info from attach arguments
4234 oop group = NULL;
4235 char* thread_name = NULL;
4236 if (args != NULL && Threads::is_supported_jni_version(args->version)) {
4237 group = JNIHandles::resolve(args->group);
4238 thread_name = args->name; // may be NULL
4239 }
4240 if (group == NULL) group = Universe::main_thread_group();
4241
4242 // Create Java level thread object and attach it to this thread
4243 bool attach_failed = false;
4244 {
4245 EXCEPTION_MARK;
4246 HandleMark hm(THREAD);
4247 Handle thread_group(THREAD, group);
4248 thread->allocate_threadObj(thread_group, thread_name, daemon, THREAD);
4249 if (HAS_PENDING_EXCEPTION) {
4250 CLEAR_PENDING_EXCEPTION;
4251 // cleanup outside the handle mark.
4252 attach_failed = true;
4253 }
4254 }
4255
4256 if (attach_failed) {
4257 // Added missing cleanup
4258 thread->cleanup_failed_attach_current_thread(daemon);
4259 return JNI_ERR;
4260 }
4261
4262 // mark the thread as no longer attaching
4263 // this uses a fence to push the change through so we don't have
4264 // to regrab the threads_lock
4265 thread->set_done_attaching_via_jni();
4266
4267 // Set java thread status.
4268 java_lang_Thread::set_thread_status(thread->threadObj(),
4269 java_lang_Thread::RUNNABLE);
4270
4271 // Notify the debugger
4272 if (JvmtiExport::should_post_thread_life()) {
4273 JvmtiExport::post_thread_start(thread);
4274 }
4275
4276 post_thread_start_event(thread);
4277
4278 *(JNIEnv**)penv = thread->jni_environment();
4279
4280 // Now leaving the VM, so change thread_state. This is normally automatically taken care
4281 // of in the JVM_ENTRY. But in this situation we have to do it manually. Notice, that by
4282 // using ThreadStateTransition::transition, we do a callback to the safepoint code if
4283 // needed.
4284
4285 ThreadStateTransition::transition(thread, _thread_in_vm, _thread_in_native);
4286
4287 // Perform any platform dependent FPU setup
4288 os::setup_fpu();
4289
4290 return JNI_OK;
4291 }
4292
4293
4294 jint JNICALL jni_AttachCurrentThread(JavaVM *vm, void **penv, void *_args) {
4295 HOTSPOT_JNI_ATTACHCURRENTTHREAD_ENTRY(vm, penv, _args);
4296 if (vm_created == 0) {
4297 HOTSPOT_JNI_ATTACHCURRENTTHREAD_RETURN((uint32_t) JNI_ERR);
4298 return JNI_ERR;
4299 }
4300
4301 JNIWrapper("AttachCurrentThread");
4302 jint ret = attach_current_thread(vm, penv, _args, false);
4303 HOTSPOT_JNI_ATTACHCURRENTTHREAD_RETURN(ret);
4304 return ret;
4305 }
4306
4307
4308 jint JNICALL jni_DetachCurrentThread(JavaVM *vm) {
4309 HOTSPOT_JNI_DETACHCURRENTTHREAD_ENTRY(vm);
4310
4311 JNIWrapper("DetachCurrentThread");
4312
4313 // If the thread has already been detached the operation is a no-op
4314 if (Thread::current_or_null() == NULL) {
4315 HOTSPOT_JNI_DETACHCURRENTTHREAD_RETURN(JNI_OK);
4316 return JNI_OK;
4317 }
4318
4319 VM_Exit::block_if_vm_exited();
4320
4321 JavaThread* thread = JavaThread::current();
4322 if (thread->has_last_Java_frame()) {
4323 HOTSPOT_JNI_DETACHCURRENTTHREAD_RETURN((uint32_t) JNI_ERR);
4324 // Can't detach a thread that's running java, that can't work.
4325 return JNI_ERR;
4326 }
4327
4328 // Safepoint support. Have to do call-back to safepoint code, if in the
4329 // middle of a safepoint operation
4330 ThreadStateTransition::transition_from_native(thread, _thread_in_vm);
4331
4332 // XXX: Note that JavaThread::exit() call below removes the guards on the
4333 // stack pages set up via enable_stack_{red,yellow}_zone() calls
4334 // above in jni_AttachCurrentThread. Unfortunately, while the setting
4335 // of the guards is visible in jni_AttachCurrentThread above,
4336 // the removal of the guards is buried below in JavaThread::exit()
4337 // here. The abstraction should be more symmetrically either exposed
4338 // or hidden (e.g. it could probably be hidden in the same
4339 // (platform-dependent) methods where we do alternate stack
4340 // maintenance work?)
4341 thread->exit(false, JavaThread::jni_detach);
4342 thread->smr_delete();
4343
4344 HOTSPOT_JNI_DETACHCURRENTTHREAD_RETURN(JNI_OK);
4345 return JNI_OK;
4346 }
4347
4348 DT_RETURN_MARK_DECL(GetEnv, jint
4349 , HOTSPOT_JNI_GETENV_RETURN(_ret_ref));
4350
4351 jint JNICALL jni_GetEnv(JavaVM *vm, void **penv, jint version) {
4352 HOTSPOT_JNI_GETENV_ENTRY(vm, penv, version);
4353 jint ret = JNI_ERR;
4354 DT_RETURN_MARK(GetEnv, jint, (const jint&)ret);
4355
4356 if (vm_created == 0) {
4357 *penv = NULL;
4358 ret = JNI_EDETACHED;
4359 return ret;
4360 }
4361
4362 if (JniExportedInterface::GetExportedInterface(vm, penv, version, &ret)) {
4363 return ret;
4364 }
4365
4366 #ifndef JVMPI_VERSION_1
4367 // need these in order to be polite about older agents
4368 #define JVMPI_VERSION_1 ((jint)0x10000001)
4369 #define JVMPI_VERSION_1_1 ((jint)0x10000002)
4370 #define JVMPI_VERSION_1_2 ((jint)0x10000003)
4371 #endif // !JVMPI_VERSION_1
4372
4373 Thread* thread = Thread::current_or_null();
4374 if (thread != NULL && thread->is_Java_thread()) {
4375 if (Threads::is_supported_jni_version_including_1_1(version)) {
4376 *(JNIEnv**)penv = ((JavaThread*) thread)->jni_environment();
4377 ret = JNI_OK;
4378 return ret;
4379
4380 } else if (version == JVMPI_VERSION_1 ||
4381 version == JVMPI_VERSION_1_1 ||
4382 version == JVMPI_VERSION_1_2) {
4383 tty->print_cr("ERROR: JVMPI, an experimental interface, is no longer supported.");
4384 tty->print_cr("Please use the supported interface: the JVM Tool Interface (JVM TI).");
4385 ret = JNI_EVERSION;
4386 return ret;
4387 } else if (JvmtiExport::is_jvmdi_version(version)) {
4388 tty->print_cr("FATAL ERROR: JVMDI is no longer supported.");
4389 tty->print_cr("Please use the supported interface: the JVM Tool Interface (JVM TI).");
4390 ret = JNI_EVERSION;
4391 return ret;
4392 } else {
4393 *penv = NULL;
4394 ret = JNI_EVERSION;
4395 return ret;
4396 }
4397 } else {
4398 *penv = NULL;
4399 ret = JNI_EDETACHED;
4400 return ret;
4401 }
4402 }
4403
4404
4405 jint JNICALL jni_AttachCurrentThreadAsDaemon(JavaVM *vm, void **penv, void *_args) {
4406 HOTSPOT_JNI_ATTACHCURRENTTHREADASDAEMON_ENTRY(vm, penv, _args);
4407 if (vm_created == 0) {
4408 HOTSPOT_JNI_ATTACHCURRENTTHREADASDAEMON_RETURN((uint32_t) JNI_ERR);
4409 return JNI_ERR;
4410 }
4411
4412 JNIWrapper("AttachCurrentThreadAsDaemon");
4413 jint ret = attach_current_thread(vm, penv, _args, true);
4414 HOTSPOT_JNI_ATTACHCURRENTTHREADASDAEMON_RETURN(ret);
4415 return ret;
4416 }
4417
4418
4419 } // End extern "C"
4420
4421 const struct JNIInvokeInterface_ jni_InvokeInterface = {
4422 NULL,
4423 NULL,
4424 NULL,
4425
4426 jni_DestroyJavaVM,
4427 jni_AttachCurrentThread,
4428 jni_DetachCurrentThread,
4429 jni_GetEnv,
4430 jni_AttachCurrentThreadAsDaemon
4431 };