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/fieldDescriptor.inline.hpp"
71 #include "runtime/handles.inline.hpp"
72 #include "runtime/interfaceSupport.inline.hpp"
73 #include "runtime/java.hpp"
74 #include "runtime/javaCalls.hpp"
75 #include "runtime/jfieldIDWorkaround.hpp"
76 #include "runtime/jniHandles.inline.hpp"
77 #include "runtime/reflection.hpp"
78 #include "runtime/safepointVerifiers.hpp"
79 #include "runtime/sharedRuntime.hpp"
80 #include "runtime/signature.hpp"
81 #include "runtime/thread.inline.hpp"
82 #include "runtime/vmOperations.hpp"
83 #include "services/memTracker.hpp"
84 #include "services/runtimeService.hpp"
85 #include "utilities/defaultStream.hpp"
86 #include "utilities/dtrace.hpp"
87 #include "utilities/events.hpp"
88 #include "utilities/histogram.hpp"
89 #include "utilities/macros.hpp"
90 #include "utilities/vmError.hpp"
91 #if INCLUDE_JVMCI
92 #include "jvmci/jvmciCompiler.hpp"
93 #endif
94
95 static jint CurrentVersion = JNI_VERSION_10;
96
97 #ifdef _WIN32
98 extern LONG WINAPI topLevelExceptionFilter(_EXCEPTION_POINTERS* );
99 #endif
100
101 // The DT_RETURN_MARK macros create a scoped object to fire the dtrace
102 // '-return' probe regardless of the return path is taken out of the function.
103 // Methods that have multiple return paths use this to avoid having to
104 // instrument each return path. Methods that use CHECK or THROW must use this
105 // since those macros can cause an immedate uninstrumented return.
106 //
107 // In order to get the return value, a reference to the variable containing
108 // the return value must be passed to the contructor of the object, and
109 // the return value must be set before return (since the mark object has
110 // a reference to it).
111 //
112 // Example:
113 // DT_RETURN_MARK_DECL(SomeFunc, int);
114 // JNI_ENTRY(int, SomeFunc, ...)
115 // int return_value = 0;
116 // DT_RETURN_MARK(SomeFunc, int, (const int&)return_value);
117 // foo(CHECK_0)
118 // return_value = 5;
119 // return return_value;
120 // JNI_END
121 #define DT_RETURN_MARK_DECL(name, type, probe) \
122 DTRACE_ONLY( \
123 class DTraceReturnProbeMark_##name { \
124 public: \
125 const type& _ret_ref; \
126 DTraceReturnProbeMark_##name(const type& v) : _ret_ref(v) {} \
127 ~DTraceReturnProbeMark_##name() { \
128 probe; \
129 } \
130 } \
131 )
132 // Void functions are simpler since there's no return value
133 #define DT_VOID_RETURN_MARK_DECL(name, probe) \
134 DTRACE_ONLY( \
135 class DTraceReturnProbeMark_##name { \
136 public: \
137 ~DTraceReturnProbeMark_##name() { \
138 probe; \
139 } \
140 } \
141 )
142
143 // Place these macros in the function to mark the return. Non-void
144 // functions need the type and address of the return value.
145 #define DT_RETURN_MARK(name, type, ref) \
146 DTRACE_ONLY( DTraceReturnProbeMark_##name dtrace_return_mark(ref) )
147 #define DT_VOID_RETURN_MARK(name) \
148 DTRACE_ONLY( DTraceReturnProbeMark_##name dtrace_return_mark )
149
150
151 // Use these to select distinct code for floating-point vs. non-floating point
152 // situations. Used from within common macros where we need slightly
153 // different behavior for Float/Double
154 #define FP_SELECT_Boolean(intcode, fpcode) intcode
155 #define FP_SELECT_Byte(intcode, fpcode) intcode
156 #define FP_SELECT_Char(intcode, fpcode) intcode
157 #define FP_SELECT_Short(intcode, fpcode) intcode
158 #define FP_SELECT_Object(intcode, fpcode) intcode
159 #define FP_SELECT_Int(intcode, fpcode) intcode
160 #define FP_SELECT_Long(intcode, fpcode) intcode
161 #define FP_SELECT_Float(intcode, fpcode) fpcode
162 #define FP_SELECT_Double(intcode, fpcode) fpcode
163 #define FP_SELECT(TypeName, intcode, fpcode) \
164 FP_SELECT_##TypeName(intcode, fpcode)
165
166 // Choose DT_RETURN_MARK macros based on the type: float/double -> void
167 // (dtrace doesn't do FP yet)
168 #define DT_RETURN_MARK_DECL_FOR(TypeName, name, type, probe) \
169 FP_SELECT(TypeName, \
170 DT_RETURN_MARK_DECL(name, type, probe), DT_VOID_RETURN_MARK_DECL(name, probe) )
171 #define DT_RETURN_MARK_FOR(TypeName, name, type, ref) \
172 FP_SELECT(TypeName, \
173 DT_RETURN_MARK(name, type, ref), DT_VOID_RETURN_MARK(name) )
174
175
176 // out-of-line helpers for class jfieldIDWorkaround:
177
178 bool jfieldIDWorkaround::is_valid_jfieldID(Klass* k, jfieldID id) {
179 if (jfieldIDWorkaround::is_instance_jfieldID(k, id)) {
180 uintptr_t as_uint = (uintptr_t) id;
181 intptr_t offset = raw_instance_offset(id);
182 if (is_checked_jfieldID(id)) {
183 if (!klass_hash_ok(k, id)) {
184 return false;
185 }
186 }
187 return InstanceKlass::cast(k)->contains_field_offset(offset);
188 } else {
189 JNIid* result = (JNIid*) id;
190 #ifdef ASSERT
191 return result != NULL && result->is_static_field_id();
192 #else
193 return result != NULL;
194 #endif
195 }
196 }
197
198
199 intptr_t jfieldIDWorkaround::encode_klass_hash(Klass* k, intptr_t offset) {
200 if (offset <= small_offset_mask) {
201 Klass* field_klass = k;
202 Klass* super_klass = field_klass->super();
203 // With compressed oops the most super class with nonstatic fields would
204 // be the owner of fields embedded in the header.
205 while (InstanceKlass::cast(super_klass)->has_nonstatic_fields() &&
206 InstanceKlass::cast(super_klass)->contains_field_offset(offset)) {
207 field_klass = super_klass; // super contains the field also
208 super_klass = field_klass->super();
209 }
210 debug_only(NoSafepointVerifier nosafepoint;)
211 uintptr_t klass_hash = field_klass->identity_hash();
212 return ((klass_hash & klass_mask) << klass_shift) | checked_mask_in_place;
213 } else {
214 #if 0
215 #ifndef PRODUCT
216 {
217 ResourceMark rm;
218 warning("VerifyJNIFields: long offset %d in %s", offset, k->external_name());
219 }
220 #endif
221 #endif
222 return 0;
223 }
224 }
225
226 bool jfieldIDWorkaround::klass_hash_ok(Klass* k, jfieldID id) {
227 uintptr_t as_uint = (uintptr_t) id;
228 intptr_t klass_hash = (as_uint >> klass_shift) & klass_mask;
229 do {
230 debug_only(NoSafepointVerifier nosafepoint;)
231 // Could use a non-blocking query for identity_hash here...
232 if ((k->identity_hash() & klass_mask) == klass_hash)
233 return true;
234 k = k->super();
235 } while (k != NULL);
236 return false;
237 }
238
239 void jfieldIDWorkaround::verify_instance_jfieldID(Klass* k, jfieldID id) {
240 guarantee(jfieldIDWorkaround::is_instance_jfieldID(k, id), "must be an instance field" );
241 uintptr_t as_uint = (uintptr_t) id;
242 intptr_t offset = raw_instance_offset(id);
243 if (VerifyJNIFields) {
244 if (is_checked_jfieldID(id)) {
245 guarantee(klass_hash_ok(k, id),
246 "Bug in native code: jfieldID class must match object");
247 } else {
248 #if 0
249 #ifndef PRODUCT
250 if (Verbose) {
251 ResourceMark rm;
252 warning("VerifyJNIFields: unverified offset %d for %s", offset, k->external_name());
253 }
254 #endif
255 #endif
256 }
257 }
258 guarantee(InstanceKlass::cast(k)->contains_field_offset(offset),
259 "Bug in native code: jfieldID offset must address interior of object");
260 }
261
262 // Wrapper to trace JNI functions
263
264 #ifdef ASSERT
265 Histogram* JNIHistogram;
266 static volatile int JNIHistogram_lock = 0;
267
268 class JNIHistogramElement : public HistogramElement {
269 public:
270 JNIHistogramElement(const char* name);
271 };
272
273 JNIHistogramElement::JNIHistogramElement(const char* elementName) {
274 _name = elementName;
275 uintx count = 0;
276
277 while (Atomic::cmpxchg(&JNIHistogram_lock, 0, 1) != 0) {
278 while (Atomic::load_acquire(&JNIHistogram_lock) != 0) {
279 count +=1;
280 if ( (WarnOnStalledSpinLock > 0)
281 && (count % WarnOnStalledSpinLock == 0)) {
282 warning("JNIHistogram_lock seems to be stalled");
283 }
284 }
285 }
286
287
288 if(JNIHistogram == NULL)
289 JNIHistogram = new Histogram("JNI Call Counts",100);
290
291 JNIHistogram->add_element(this);
292 Atomic::dec(&JNIHistogram_lock);
293 }
294
295 #define JNICountWrapper(arg) \
296 static JNIHistogramElement* e = new JNIHistogramElement(arg); \
297 /* There is a MT-race condition in VC++. So we need to make sure that that e has been initialized */ \
298 if (e != NULL) e->increment_count()
299 #define JNIWrapper(arg) JNICountWrapper(arg);
300 #else
301 #define JNIWrapper(arg)
302 #endif
303
304
305 // Implementation of JNI entries
306
307 DT_RETURN_MARK_DECL(DefineClass, jclass
308 , HOTSPOT_JNI_DEFINECLASS_RETURN(_ret_ref));
309
310 JNI_ENTRY(jclass, jni_DefineClass(JNIEnv *env, const char *name, jobject loaderRef,
311 const jbyte *buf, jsize bufLen))
312 JNIWrapper("DefineClass");
313
314 HOTSPOT_JNI_DEFINECLASS_ENTRY(
315 env, (char*) name, loaderRef, (char*) buf, bufLen);
316
317 jclass cls = NULL;
318 DT_RETURN_MARK(DefineClass, jclass, (const jclass&)cls);
319
320 TempNewSymbol class_name = NULL;
321 // Since exceptions can be thrown, class initialization can take place
322 // if name is NULL no check for class name in .class stream has to be made.
323 if (name != NULL) {
324 const int str_len = (int)strlen(name);
325 if (str_len > Symbol::max_length()) {
326 // It's impossible to create this class; the name cannot fit
327 // into the constant pool.
328 Exceptions::fthrow(THREAD_AND_LOCATION,
329 vmSymbols::java_lang_NoClassDefFoundError(),
330 "Class name exceeds maximum length of %d: %s",
331 Symbol::max_length(),
332 name);
333 return 0;
334 }
335 class_name = SymbolTable::new_symbol(name);
336 }
337 ResourceMark rm(THREAD);
338 ClassFileStream st((u1*)buf, bufLen, NULL, ClassFileStream::verify);
339 Handle class_loader (THREAD, JNIHandles::resolve(loaderRef));
340
341 if (UsePerfData && !class_loader.is_null()) {
342 // check whether the current caller thread holds the lock or not.
343 // If not, increment the corresponding counter
344 if (ObjectSynchronizer::
345 query_lock_ownership((JavaThread*)THREAD, class_loader) !=
346 ObjectSynchronizer::owner_self) {
347 ClassLoader::sync_JNIDefineClassLockFreeCounter()->inc();
348 }
349 }
350 Klass* k = SystemDictionary::resolve_from_stream(class_name,
351 class_loader,
352 Handle(),
353 &st,
354 CHECK_NULL);
355
356 if (log_is_enabled(Debug, class, resolve) && k != NULL) {
357 trace_class_resolution(k);
358 }
359
360 cls = (jclass)JNIHandles::make_local(
361 env, k->java_mirror());
362 return cls;
363 JNI_END
364
365
366
367 DT_RETURN_MARK_DECL(FindClass, jclass
368 , HOTSPOT_JNI_FINDCLASS_RETURN(_ret_ref));
369
370 JNI_ENTRY(jclass, jni_FindClass(JNIEnv *env, const char *name))
371 JNIWrapper("FindClass");
372
373 HOTSPOT_JNI_FINDCLASS_ENTRY(env, (char *)name);
374
375 jclass result = NULL;
376 DT_RETURN_MARK(FindClass, jclass, (const jclass&)result);
377
378 // Sanity check the name: it cannot be null or larger than the maximum size
379 // name we can fit in the constant pool.
380 if (name == NULL) {
381 THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), "No class name given");
382 }
383 if ((int)strlen(name) > Symbol::max_length()) {
384 Exceptions::fthrow(THREAD_AND_LOCATION,
385 vmSymbols::java_lang_NoClassDefFoundError(),
386 "Class name exceeds maximum length of %d: %s",
387 Symbol::max_length(),
388 name);
389 return 0;
390 }
391
392 //%note jni_3
393 Handle protection_domain;
394 // Find calling class
395 Klass* k = thread->security_get_caller_class(0);
396 // default to the system loader when no context
397 Handle loader(THREAD, SystemDictionary::java_system_loader());
398 if (k != NULL) {
399 // Special handling to make sure JNI_OnLoad and JNI_OnUnload are executed
400 // in the correct class context.
401 if (k->class_loader() == NULL &&
402 k->name() == vmSymbols::java_lang_ClassLoader_NativeLibrary()) {
403 JavaValue result(T_OBJECT);
404 JavaCalls::call_static(&result, k,
405 vmSymbols::getFromClass_name(),
406 vmSymbols::void_class_signature(),
407 CHECK_NULL);
408 // When invoked from JNI_OnLoad, NativeLibrary::getFromClass returns
409 // a non-NULL Class object. When invoked from JNI_OnUnload,
410 // it will return NULL to indicate no context.
411 oop mirror = (oop) result.get_jobject();
412 if (mirror != NULL) {
413 Klass* fromClass = java_lang_Class::as_Klass(mirror);
414 loader = Handle(THREAD, fromClass->class_loader());
415 protection_domain = Handle(THREAD, fromClass->protection_domain());
416 }
417 } else {
418 loader = Handle(THREAD, k->class_loader());
419 }
420 }
421
422 TempNewSymbol sym = SymbolTable::new_symbol(name);
423 result = find_class_from_class_loader(env, sym, true, loader,
424 protection_domain, true, thread);
425
426 if (log_is_enabled(Debug, class, resolve) && result != NULL) {
427 trace_class_resolution(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(result)));
428 }
429
430 return result;
431 JNI_END
432
433 DT_RETURN_MARK_DECL(FromReflectedMethod, jmethodID
434 , HOTSPOT_JNI_FROMREFLECTEDMETHOD_RETURN((uintptr_t)_ret_ref));
435
436 JNI_ENTRY(jmethodID, jni_FromReflectedMethod(JNIEnv *env, jobject method))
437 JNIWrapper("FromReflectedMethod");
438
439 HOTSPOT_JNI_FROMREFLECTEDMETHOD_ENTRY(env, method);
440
441 jmethodID ret = NULL;
442 DT_RETURN_MARK(FromReflectedMethod, jmethodID, (const jmethodID&)ret);
443
444 // method is a handle to a java.lang.reflect.Method object
445 oop reflected = JNIHandles::resolve_non_null(method);
446 oop mirror = NULL;
447 int slot = 0;
448
449 if (reflected->klass() == SystemDictionary::reflect_Constructor_klass()) {
450 mirror = java_lang_reflect_Constructor::clazz(reflected);
451 slot = java_lang_reflect_Constructor::slot(reflected);
452 } else {
453 assert(reflected->klass() == SystemDictionary::reflect_Method_klass(), "wrong type");
454 mirror = java_lang_reflect_Method::clazz(reflected);
455 slot = java_lang_reflect_Method::slot(reflected);
456 }
457 Klass* k1 = java_lang_Class::as_Klass(mirror);
458
459 // Make sure class is initialized before handing id's out to methods
460 k1->initialize(CHECK_NULL);
461 Method* m = InstanceKlass::cast(k1)->method_with_idnum(slot);
462 ret = m==NULL? NULL : m->jmethod_id(); // return NULL if reflected method deleted
463 return ret;
464 JNI_END
465
466 DT_RETURN_MARK_DECL(FromReflectedField, jfieldID
467 , HOTSPOT_JNI_FROMREFLECTEDFIELD_RETURN((uintptr_t)_ret_ref));
468
469 JNI_ENTRY(jfieldID, jni_FromReflectedField(JNIEnv *env, jobject field))
470 JNIWrapper("FromReflectedField");
471
472 HOTSPOT_JNI_FROMREFLECTEDFIELD_ENTRY(env, field);
473
474 jfieldID ret = NULL;
475 DT_RETURN_MARK(FromReflectedField, jfieldID, (const jfieldID&)ret);
476
477 // field is a handle to a java.lang.reflect.Field object
478 oop reflected = JNIHandles::resolve_non_null(field);
479 oop mirror = java_lang_reflect_Field::clazz(reflected);
480 Klass* k1 = java_lang_Class::as_Klass(mirror);
481 int slot = java_lang_reflect_Field::slot(reflected);
482 int modifiers = java_lang_reflect_Field::modifiers(reflected);
483
484 // Make sure class is initialized before handing id's out to fields
485 k1->initialize(CHECK_NULL);
486
487 // First check if this is a static field
488 if (modifiers & JVM_ACC_STATIC) {
489 intptr_t offset = InstanceKlass::cast(k1)->field_offset( slot );
490 JNIid* id = InstanceKlass::cast(k1)->jni_id_for(offset);
491 assert(id != NULL, "corrupt Field object");
492 debug_only(id->set_is_static_field_id();)
493 // A jfieldID for a static field is a JNIid specifying the field holder and the offset within the Klass*
494 ret = jfieldIDWorkaround::to_static_jfieldID(id);
495 return ret;
496 }
497
498 // The slot is the index of the field description in the field-array
499 // The jfieldID is the offset of the field within the object
500 // It may also have hash bits for k, if VerifyJNIFields is turned on.
501 intptr_t offset = InstanceKlass::cast(k1)->field_offset( slot );
502 bool is_flattened = InstanceKlass::cast(k1)->field_is_flattened(slot);
503 assert(InstanceKlass::cast(k1)->contains_field_offset(offset), "stay within object");
504 ret = jfieldIDWorkaround::to_instance_jfieldID(k1, offset, is_flattened);
505 return ret;
506 JNI_END
507
508
509 DT_RETURN_MARK_DECL(ToReflectedMethod, jobject
510 , HOTSPOT_JNI_TOREFLECTEDMETHOD_RETURN(_ret_ref));
511
512 JNI_ENTRY(jobject, jni_ToReflectedMethod(JNIEnv *env, jclass cls, jmethodID method_id, jboolean isStatic))
513 JNIWrapper("ToReflectedMethod");
514
515 HOTSPOT_JNI_TOREFLECTEDMETHOD_ENTRY(env, cls, (uintptr_t) method_id, isStatic);
516
517 jobject ret = NULL;
518 DT_RETURN_MARK(ToReflectedMethod, jobject, (const jobject&)ret);
519
520 methodHandle m (THREAD, Method::resolve_jmethod_id(method_id));
521 assert(m->is_static() == (isStatic != 0), "jni_ToReflectedMethod access flags doesn't match");
522 oop reflection_method;
523 if (m->is_object_constructor()) {
524 reflection_method = Reflection::new_constructor(m, CHECK_NULL);
525 } else {
526 reflection_method = Reflection::new_method(m, false, CHECK_NULL);
527 }
528 ret = JNIHandles::make_local(env, reflection_method);
529 return ret;
530 JNI_END
531
532 DT_RETURN_MARK_DECL(GetSuperclass, jclass
533 , HOTSPOT_JNI_GETSUPERCLASS_RETURN(_ret_ref));
534
535 JNI_ENTRY(jclass, jni_GetSuperclass(JNIEnv *env, jclass sub))
536 JNIWrapper("GetSuperclass");
537
538 HOTSPOT_JNI_GETSUPERCLASS_ENTRY(env, sub);
539
540 jclass obj = NULL;
541 DT_RETURN_MARK(GetSuperclass, jclass, (const jclass&)obj);
542
543 oop mirror = JNIHandles::resolve_non_null(sub);
544 // primitive classes return NULL
545 if (java_lang_Class::is_primitive(mirror)) return NULL;
546
547 // Rules of Class.getSuperClass as implemented by KLass::java_super:
548 // arrays return Object
549 // interfaces return NULL
550 // proper classes return Klass::super()
551 Klass* k = java_lang_Class::as_Klass(mirror);
552 if (k->is_interface()) return NULL;
553
554 // return mirror for superclass
555 Klass* super = k->java_super();
556 // super2 is the value computed by the compiler's getSuperClass intrinsic:
557 debug_only(Klass* super2 = ( k->is_array_klass()
558 ? SystemDictionary::Object_klass()
559 : k->super() ) );
560 assert(super == super2,
561 "java_super computation depends on interface, array, other super");
562 obj = (super == NULL) ? NULL : (jclass) JNIHandles::make_local(super->java_mirror());
563 return obj;
564 JNI_END
565
566 JNI_ENTRY_NO_PRESERVE(jboolean, jni_IsAssignableFrom(JNIEnv *env, jclass sub, jclass super))
567 JNIWrapper("IsSubclassOf");
568
569 HOTSPOT_JNI_ISASSIGNABLEFROM_ENTRY(env, sub, super);
570
571 oop sub_mirror = JNIHandles::resolve_non_null(sub);
572 oop super_mirror = JNIHandles::resolve_non_null(super);
573 if (java_lang_Class::is_primitive(sub_mirror) ||
574 java_lang_Class::is_primitive(super_mirror)) {
575 jboolean ret = (sub_mirror == super_mirror);
576
577 HOTSPOT_JNI_ISASSIGNABLEFROM_RETURN(ret);
578 return ret;
579 }
580 Klass* sub_klass = java_lang_Class::as_Klass(sub_mirror);
581 Klass* super_klass = java_lang_Class::as_Klass(super_mirror);
582 assert(sub_klass != NULL && super_klass != NULL, "invalid arguments to jni_IsAssignableFrom");
583 jboolean ret = sub_klass->is_subtype_of(super_klass) ?
584 JNI_TRUE : JNI_FALSE;
585 if (sub_klass == super_klass && sub_klass->is_value()) {
586 // for inline class, V <: V?
587 ValueKlass* vk = ValueKlass::cast(InstanceKlass::cast(sub_klass));
588 if (sub_mirror == super_mirror || (sub_mirror == vk->value_mirror() && super_mirror == vk->indirect_mirror())) {
589 ret = JNI_TRUE;
590 } else {
591 ret = JNI_FALSE;
592 }
593 }
594 HOTSPOT_JNI_ISASSIGNABLEFROM_RETURN(ret);
595 return ret;
596 JNI_END
597
598
599 DT_RETURN_MARK_DECL(Throw, jint
600 , HOTSPOT_JNI_THROW_RETURN(_ret_ref));
601
602 JNI_ENTRY(jint, jni_Throw(JNIEnv *env, jthrowable obj))
603 JNIWrapper("Throw");
604
605 HOTSPOT_JNI_THROW_ENTRY(env, obj);
606
607 jint ret = JNI_OK;
608 DT_RETURN_MARK(Throw, jint, (const jint&)ret);
609
610 THROW_OOP_(JNIHandles::resolve(obj), JNI_OK);
611 ShouldNotReachHere();
612 return 0; // Mute compiler.
613 JNI_END
614
615
616 DT_RETURN_MARK_DECL(ThrowNew, jint
617 , HOTSPOT_JNI_THROWNEW_RETURN(_ret_ref));
618
619 JNI_ENTRY(jint, jni_ThrowNew(JNIEnv *env, jclass clazz, const char *message))
620 JNIWrapper("ThrowNew");
621
622 HOTSPOT_JNI_THROWNEW_ENTRY(env, clazz, (char *) message);
623
624 jint ret = JNI_OK;
625 DT_RETURN_MARK(ThrowNew, jint, (const jint&)ret);
626
627 InstanceKlass* k = InstanceKlass::cast(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz)));
628 Symbol* name = k->name();
629 Handle class_loader (THREAD, k->class_loader());
630 Handle protection_domain (THREAD, k->protection_domain());
631 THROW_MSG_LOADER_(name, (char *)message, class_loader, protection_domain, JNI_OK);
632 ShouldNotReachHere();
633 return 0; // Mute compiler.
634 JNI_END
635
636
637 // JNI functions only transform a pending async exception to a synchronous
638 // exception in ExceptionOccurred and ExceptionCheck calls, since
639 // delivering an async exception in other places won't change the native
640 // code's control flow and would be harmful when native code further calls
641 // JNI functions with a pending exception. Async exception is also checked
642 // during the call, so ExceptionOccurred/ExceptionCheck won't return
643 // false but deliver the async exception at the very end during
644 // state transition.
645
646 static void jni_check_async_exceptions(JavaThread *thread) {
647 assert(thread == Thread::current(), "must be itself");
648 thread->check_and_handle_async_exceptions();
649 }
650
651 JNI_ENTRY_NO_PRESERVE(jthrowable, jni_ExceptionOccurred(JNIEnv *env))
652 JNIWrapper("ExceptionOccurred");
653
654 HOTSPOT_JNI_EXCEPTIONOCCURRED_ENTRY(env);
655
656 jni_check_async_exceptions(thread);
657 oop exception = thread->pending_exception();
658 jthrowable ret = (jthrowable) JNIHandles::make_local(env, exception);
659
660 HOTSPOT_JNI_EXCEPTIONOCCURRED_RETURN(ret);
661 return ret;
662 JNI_END
663
664
665 JNI_ENTRY_NO_PRESERVE(void, jni_ExceptionDescribe(JNIEnv *env))
666 JNIWrapper("ExceptionDescribe");
667
668 HOTSPOT_JNI_EXCEPTIONDESCRIBE_ENTRY(env);
669
670 if (thread->has_pending_exception()) {
671 Handle ex(thread, thread->pending_exception());
672 thread->clear_pending_exception();
673 if (ex->is_a(SystemDictionary::ThreadDeath_klass())) {
674 // Don't print anything if we are being killed.
675 } else {
676 jio_fprintf(defaultStream::error_stream(), "Exception ");
677 if (thread != NULL && thread->threadObj() != NULL) {
678 ResourceMark rm(THREAD);
679 jio_fprintf(defaultStream::error_stream(),
680 "in thread \"%s\" ", thread->get_thread_name());
681 }
682 if (ex->is_a(SystemDictionary::Throwable_klass())) {
683 JavaValue result(T_VOID);
684 JavaCalls::call_virtual(&result,
685 ex,
686 SystemDictionary::Throwable_klass(),
687 vmSymbols::printStackTrace_name(),
688 vmSymbols::void_method_signature(),
689 THREAD);
690 // If an exception is thrown in the call it gets thrown away. Not much
691 // we can do with it. The native code that calls this, does not check
692 // for the exception - hence, it might still be in the thread when DestroyVM gets
693 // called, potentially causing a few asserts to trigger - since no pending exception
694 // is expected.
695 CLEAR_PENDING_EXCEPTION;
696 } else {
697 ResourceMark rm(THREAD);
698 jio_fprintf(defaultStream::error_stream(),
699 ". Uncaught exception of type %s.",
700 ex->klass()->external_name());
701 }
702 }
703 }
704
705 HOTSPOT_JNI_EXCEPTIONDESCRIBE_RETURN();
706 JNI_END
707
708
709 JNI_ENTRY_NO_PRESERVE(void, jni_ExceptionClear(JNIEnv *env))
710 JNIWrapper("ExceptionClear");
711
712 HOTSPOT_JNI_EXCEPTIONCLEAR_ENTRY(env);
713
714 // The jni code might be using this API to clear java thrown exception.
715 // So just mark jvmti thread exception state as exception caught.
716 JvmtiThreadState *state = JavaThread::current()->jvmti_thread_state();
717 if (state != NULL && state->is_exception_detected()) {
718 state->set_exception_caught();
719 }
720 thread->clear_pending_exception();
721
722 HOTSPOT_JNI_EXCEPTIONCLEAR_RETURN();
723 JNI_END
724
725
726 JNI_ENTRY(void, jni_FatalError(JNIEnv *env, const char *msg))
727 JNIWrapper("FatalError");
728
729 HOTSPOT_JNI_FATALERROR_ENTRY(env, (char *) msg);
730
731 tty->print_cr("FATAL ERROR in native method: %s", msg);
732 thread->print_stack();
733 os::abort(); // Dump core and abort
734 JNI_END
735
736
737 JNI_ENTRY(jint, jni_PushLocalFrame(JNIEnv *env, jint capacity))
738 JNIWrapper("PushLocalFrame");
739
740 HOTSPOT_JNI_PUSHLOCALFRAME_ENTRY(env, capacity);
741
742 //%note jni_11
743 if (capacity < 0 ||
744 ((MaxJNILocalCapacity > 0) && (capacity > MaxJNILocalCapacity))) {
745 HOTSPOT_JNI_PUSHLOCALFRAME_RETURN((uint32_t)JNI_ERR);
746 return JNI_ERR;
747 }
748 JNIHandleBlock* old_handles = thread->active_handles();
749 JNIHandleBlock* new_handles = JNIHandleBlock::allocate_block(thread);
750 assert(new_handles != NULL, "should not be NULL");
751 new_handles->set_pop_frame_link(old_handles);
752 thread->set_active_handles(new_handles);
753 jint ret = JNI_OK;
754 HOTSPOT_JNI_PUSHLOCALFRAME_RETURN(ret);
755 return ret;
756 JNI_END
757
758
759 JNI_ENTRY(jobject, jni_PopLocalFrame(JNIEnv *env, jobject result))
760 JNIWrapper("PopLocalFrame");
761
762 HOTSPOT_JNI_POPLOCALFRAME_ENTRY(env, result);
763
764 //%note jni_11
765 Handle result_handle(thread, JNIHandles::resolve(result));
766 JNIHandleBlock* old_handles = thread->active_handles();
767 JNIHandleBlock* new_handles = old_handles->pop_frame_link();
768 if (new_handles != NULL) {
769 // As a sanity check we only release the handle blocks if the pop_frame_link is not NULL.
770 // This way code will still work if PopLocalFrame is called without a corresponding
771 // PushLocalFrame call. Note that we set the pop_frame_link to NULL explicitly, otherwise
772 // the release_block call will release the blocks.
773 thread->set_active_handles(new_handles);
774 old_handles->set_pop_frame_link(NULL); // clear link we won't release new_handles below
775 JNIHandleBlock::release_block(old_handles, thread); // may block
776 result = JNIHandles::make_local(thread, result_handle());
777 }
778 HOTSPOT_JNI_POPLOCALFRAME_RETURN(result);
779 return result;
780 JNI_END
781
782
783 JNI_ENTRY(jobject, jni_NewGlobalRef(JNIEnv *env, jobject ref))
784 JNIWrapper("NewGlobalRef");
785
786 HOTSPOT_JNI_NEWGLOBALREF_ENTRY(env, ref);
787
788 Handle ref_handle(thread, JNIHandles::resolve(ref));
789 jobject ret = JNIHandles::make_global(ref_handle);
790
791 HOTSPOT_JNI_NEWGLOBALREF_RETURN(ret);
792 return ret;
793 JNI_END
794
795 // Must be JNI_ENTRY (with HandleMark)
796 JNI_ENTRY_NO_PRESERVE(void, jni_DeleteGlobalRef(JNIEnv *env, jobject ref))
797 JNIWrapper("DeleteGlobalRef");
798
799 HOTSPOT_JNI_DELETEGLOBALREF_ENTRY(env, ref);
800
801 JNIHandles::destroy_global(ref);
802
803 HOTSPOT_JNI_DELETEGLOBALREF_RETURN();
804 JNI_END
805
806 JNI_ENTRY_NO_PRESERVE(void, jni_DeleteLocalRef(JNIEnv *env, jobject obj))
807 JNIWrapper("DeleteLocalRef");
808
809 HOTSPOT_JNI_DELETELOCALREF_ENTRY(env, obj);
810
811 JNIHandles::destroy_local(obj);
812
813 HOTSPOT_JNI_DELETELOCALREF_RETURN();
814 JNI_END
815
816 JNI_ENTRY_NO_PRESERVE(jboolean, jni_IsSameObject(JNIEnv *env, jobject r1, jobject r2))
817 JNIWrapper("IsSameObject");
818
819 HOTSPOT_JNI_ISSAMEOBJECT_ENTRY(env, r1, r2);
820
821 jboolean ret = JNIHandles::is_same_object(r1, r2) ? JNI_TRUE : JNI_FALSE;
822
823 HOTSPOT_JNI_ISSAMEOBJECT_RETURN(ret);
824 return ret;
825 JNI_END
826
827
828 JNI_ENTRY(jobject, jni_NewLocalRef(JNIEnv *env, jobject ref))
829 JNIWrapper("NewLocalRef");
830
831 HOTSPOT_JNI_NEWLOCALREF_ENTRY(env, ref);
832
833 jobject ret = JNIHandles::make_local(env, JNIHandles::resolve(ref));
834
835 HOTSPOT_JNI_NEWLOCALREF_RETURN(ret);
836 return ret;
837 JNI_END
838
839 JNI_LEAF(jint, jni_EnsureLocalCapacity(JNIEnv *env, jint capacity))
840 JNIWrapper("EnsureLocalCapacity");
841
842 HOTSPOT_JNI_ENSURELOCALCAPACITY_ENTRY(env, capacity);
843
844 jint ret;
845 if (capacity >= 0 &&
846 ((MaxJNILocalCapacity <= 0) || (capacity <= MaxJNILocalCapacity))) {
847 ret = JNI_OK;
848 } else {
849 ret = JNI_ERR;
850 }
851
852 HOTSPOT_JNI_ENSURELOCALCAPACITY_RETURN(ret);
853 return ret;
854 JNI_END
855
856 // Return the Handle Type
857 JNI_LEAF(jobjectRefType, jni_GetObjectRefType(JNIEnv *env, jobject obj))
858 JNIWrapper("GetObjectRefType");
859
860 HOTSPOT_JNI_GETOBJECTREFTYPE_ENTRY(env, obj);
861
862 jobjectRefType ret = JNIInvalidRefType;
863 if (obj != NULL) {
864 ret = JNIHandles::handle_type(thread, obj);
865 }
866
867 HOTSPOT_JNI_GETOBJECTREFTYPE_RETURN((void *) ret);
868 return ret;
869 JNI_END
870
871
872 class JNI_ArgumentPusher : public SignatureIterator {
873 protected:
874 JavaCallArguments* _arguments;
875
876 virtual void get_bool () = 0;
877 virtual void get_char () = 0;
878 virtual void get_short () = 0;
879 virtual void get_byte () = 0;
880 virtual void get_int () = 0;
881 virtual void get_long () = 0;
882 virtual void get_float () = 0;
883 virtual void get_double () = 0;
884 virtual void get_object () = 0;
885 virtual void get_valuetype() = 0;
886
887 JNI_ArgumentPusher(Symbol* signature) : SignatureIterator(signature) {
888 this->_return_type = T_ILLEGAL;
889 _arguments = NULL;
890 }
891
892 public:
893 virtual void iterate( uint64_t fingerprint ) = 0;
894
895 void set_java_argument_object(JavaCallArguments *arguments) { _arguments = arguments; }
896
897 inline void do_bool() { if (!is_return_type()) get_bool(); }
898 inline void do_char() { if (!is_return_type()) get_char(); }
899 inline void do_short() { if (!is_return_type()) get_short(); }
900 inline void do_byte() { if (!is_return_type()) get_byte(); }
901 inline void do_int() { if (!is_return_type()) get_int(); }
902 inline void do_long() { if (!is_return_type()) get_long(); }
903 inline void do_float() { if (!is_return_type()) get_float(); }
904 inline void do_double() { if (!is_return_type()) get_double(); }
905 inline void do_object(int begin, int end) { if (!is_return_type()) get_object(); }
906 inline void do_valuetype(int begin, int end) { if (!is_return_type()) get_valuetype(); }
907 inline void do_array(int begin, int end) { if (!is_return_type()) get_object(); } // do_array uses get_object -- there is no get_array
908 inline void do_void() { }
909
910 JavaCallArguments* arguments() { return _arguments; }
911 void push_receiver(Handle h) { _arguments->push_oop(h); }
912 };
913
914
915 class JNI_ArgumentPusherVaArg : public JNI_ArgumentPusher {
916 protected:
917 va_list _ap;
918
919 inline void get_bool() {
920 // Normalize boolean arguments from native code by converting 1-255 to JNI_TRUE and
921 // 0 to JNI_FALSE. Boolean return values from native are normalized the same in
922 // TemplateInterpreterGenerator::generate_result_handler_for and
923 // SharedRuntime::generate_native_wrapper.
924 jboolean b = va_arg(_ap, jint);
925 _arguments->push_int((jint)(b == 0 ? JNI_FALSE : JNI_TRUE));
926 }
927 inline void get_char() { _arguments->push_int(va_arg(_ap, jint)); } // char is coerced to int when using va_arg
928 inline void get_short() { _arguments->push_int(va_arg(_ap, jint)); } // short is coerced to int when using va_arg
929 inline void get_byte() { _arguments->push_int(va_arg(_ap, jint)); } // byte is coerced to int when using va_arg
930 inline void get_int() { _arguments->push_int(va_arg(_ap, jint)); }
931
932 // each of these paths is exercized by the various jck Call[Static,Nonvirtual,][Void,Int,..]Method[A,V,] tests
933
934 inline void get_long() { _arguments->push_long(va_arg(_ap, jlong)); }
935 inline void get_float() { _arguments->push_float((jfloat)va_arg(_ap, jdouble)); } // float is coerced to double w/ va_arg
936 inline void get_double() { _arguments->push_double(va_arg(_ap, jdouble)); }
937 inline void get_object() { _arguments->push_jobject(va_arg(_ap, jobject)); }
938 inline void get_valuetype() { _arguments->push_jobject(va_arg(_ap, jobject)); }
939
940 inline void set_ap(va_list rap) {
941 va_copy(_ap, rap);
942 }
943
944 public:
945 JNI_ArgumentPusherVaArg(Symbol* signature, va_list rap)
946 : JNI_ArgumentPusher(signature) {
947 set_ap(rap);
948 }
949 JNI_ArgumentPusherVaArg(jmethodID method_id, va_list rap)
950 : JNI_ArgumentPusher(Method::resolve_jmethod_id(method_id)->signature()) {
951 set_ap(rap);
952 }
953
954 // Optimized path if we have the bitvector form of signature
955 void iterate( uint64_t fingerprint ) {
956 if (fingerprint == (uint64_t)CONST64(-1)) {
957 SignatureIterator::iterate(); // Must be too many arguments
958 } else {
959 _return_type = (BasicType)((fingerprint >> static_feature_size) &
960 result_feature_mask);
961
962 assert(fingerprint, "Fingerprint should not be 0");
963 fingerprint = fingerprint >> (static_feature_size + result_feature_size);
964 while ( 1 ) {
965 switch ( fingerprint & parameter_feature_mask ) {
966 case bool_parm:
967 get_bool();
968 break;
969 case char_parm:
970 get_char();
971 break;
972 case short_parm:
973 get_short();
974 break;
975 case byte_parm:
976 get_byte();
977 break;
978 case int_parm:
979 get_int();
980 break;
981 case obj_parm:
982 get_object();
983 break;
984 case long_parm:
985 get_long();
986 break;
987 case float_parm:
988 get_float();
989 break;
990 case double_parm:
991 get_double();
992 break;
993 case done_parm:
994 return;
995 break;
996 default:
997 ShouldNotReachHere();
998 break;
999 }
1000 fingerprint >>= parameter_feature_size;
1001 }
1002 }
1003 }
1004 };
1005
1006
1007 class JNI_ArgumentPusherArray : public JNI_ArgumentPusher {
1008 protected:
1009 const jvalue *_ap;
1010
1011 inline void get_bool() {
1012 // Normalize boolean arguments from native code by converting 1-255 to JNI_TRUE and
1013 // 0 to JNI_FALSE. Boolean return values from native are normalized the same in
1014 // TemplateInterpreterGenerator::generate_result_handler_for and
1015 // SharedRuntime::generate_native_wrapper.
1016 jboolean b = (_ap++)->z;
1017 _arguments->push_int((jint)(b == 0 ? JNI_FALSE : JNI_TRUE));
1018 }
1019 inline void get_char() { _arguments->push_int((jint)(_ap++)->c); }
1020 inline void get_short() { _arguments->push_int((jint)(_ap++)->s); }
1021 inline void get_byte() { _arguments->push_int((jint)(_ap++)->b); }
1022 inline void get_int() { _arguments->push_int((jint)(_ap++)->i); }
1023
1024 inline void get_long() { _arguments->push_long((_ap++)->j); }
1025 inline void get_float() { _arguments->push_float((_ap++)->f); }
1026 inline void get_double() { _arguments->push_double((_ap++)->d);}
1027 inline void get_object() { _arguments->push_jobject((_ap++)->l); }
1028 // value types are implemented with oops too
1029 inline void get_valuetype() { _arguments->push_jobject((_ap++)->l); }
1030
1031 inline void set_ap(const jvalue *rap) { _ap = rap; }
1032
1033 public:
1034 JNI_ArgumentPusherArray(Symbol* signature, const jvalue *rap)
1035 : JNI_ArgumentPusher(signature) {
1036 set_ap(rap);
1037 }
1038 JNI_ArgumentPusherArray(jmethodID method_id, const jvalue *rap)
1039 : JNI_ArgumentPusher(Method::resolve_jmethod_id(method_id)->signature()) {
1040 set_ap(rap);
1041 }
1042
1043 // Optimized path if we have the bitvector form of signature
1044 void iterate( uint64_t fingerprint ) {
1045 if (fingerprint == (uint64_t)CONST64(-1)) {
1046 SignatureIterator::iterate(); // Must be too many arguments
1047 } else {
1048 _return_type = (BasicType)((fingerprint >> static_feature_size) &
1049 result_feature_mask);
1050 assert(fingerprint, "Fingerprint should not be 0");
1051 fingerprint = fingerprint >> (static_feature_size + result_feature_size);
1052 while ( 1 ) {
1053 switch ( fingerprint & parameter_feature_mask ) {
1054 case bool_parm:
1055 get_bool();
1056 break;
1057 case char_parm:
1058 get_char();
1059 break;
1060 case short_parm:
1061 get_short();
1062 break;
1063 case byte_parm:
1064 get_byte();
1065 break;
1066 case int_parm:
1067 get_int();
1068 break;
1069 case obj_parm:
1070 get_object();
1071 break;
1072 case long_parm:
1073 get_long();
1074 break;
1075 case float_parm:
1076 get_float();
1077 break;
1078 case double_parm:
1079 get_double();
1080 break;
1081 case done_parm:
1082 return;
1083 break;
1084 default:
1085 ShouldNotReachHere();
1086 break;
1087 }
1088 fingerprint >>= parameter_feature_size;
1089 }
1090 }
1091 }
1092 };
1093
1094
1095 enum JNICallType {
1096 JNI_STATIC,
1097 JNI_VIRTUAL,
1098 JNI_NONVIRTUAL
1099 };
1100
1101
1102
1103 static void jni_invoke_static(JNIEnv *env, JavaValue* result, jobject receiver, JNICallType call_type, jmethodID method_id, JNI_ArgumentPusher *args, TRAPS) {
1104 methodHandle method(THREAD, Method::resolve_jmethod_id(method_id));
1105
1106 // Create object to hold arguments for the JavaCall, and associate it with
1107 // the jni parser
1108 ResourceMark rm(THREAD);
1109 int number_of_parameters = method->size_of_parameters();
1110 JavaCallArguments java_args(number_of_parameters);
1111 args->set_java_argument_object(&java_args);
1112
1113 assert(method->is_static(), "method should be static");
1114
1115 // Fill out JavaCallArguments object
1116 args->iterate( Fingerprinter(method).fingerprint() );
1117 // Initialize result type
1118 result->set_type(args->get_ret_type());
1119
1120 // Invoke the method. Result is returned as oop.
1121 JavaCalls::call(result, method, &java_args, CHECK);
1122
1123 // Convert result
1124 if (is_reference_type(result->get_type())) {
1125 result->set_jobject(JNIHandles::make_local(env, (oop) result->get_jobject()));
1126 }
1127 }
1128
1129
1130 static void jni_invoke_nonstatic(JNIEnv *env, JavaValue* result, jobject receiver, JNICallType call_type, jmethodID method_id, JNI_ArgumentPusher *args, TRAPS) {
1131 oop recv = JNIHandles::resolve(receiver);
1132 if (recv == NULL) {
1133 THROW(vmSymbols::java_lang_NullPointerException());
1134 }
1135 Handle h_recv(THREAD, recv);
1136
1137 int number_of_parameters;
1138 Method* selected_method;
1139 {
1140 Method* m = Method::resolve_jmethod_id(method_id);
1141 number_of_parameters = m->size_of_parameters();
1142 Klass* holder = m->method_holder();
1143 if (call_type != JNI_VIRTUAL) {
1144 selected_method = m;
1145 } else if (!m->has_itable_index()) {
1146 // non-interface call -- for that little speed boost, don't handlize
1147 debug_only(NoSafepointVerifier nosafepoint;)
1148 // jni_GetMethodID makes sure class is linked and initialized
1149 // so m should have a valid vtable index.
1150 assert(m->valid_vtable_index(), "no valid vtable index");
1151 int vtbl_index = m->vtable_index();
1152 if (vtbl_index != Method::nonvirtual_vtable_index) {
1153 selected_method = h_recv->klass()->method_at_vtable(vtbl_index);
1154 } else {
1155 // final method
1156 selected_method = m;
1157 }
1158 } else {
1159 // interface call
1160 int itbl_index = m->itable_index();
1161 Klass* k = h_recv->klass();
1162 selected_method = InstanceKlass::cast(k)->method_at_itable(holder, itbl_index, CHECK);
1163 }
1164 }
1165
1166 methodHandle method(THREAD, selected_method);
1167
1168 // Create object to hold arguments for the JavaCall, and associate it with
1169 // the jni parser
1170 ResourceMark rm(THREAD);
1171 JavaCallArguments java_args(number_of_parameters);
1172 args->set_java_argument_object(&java_args);
1173
1174 // handle arguments
1175 assert(!method->is_static(), "method %s should not be static", method->name_and_sig_as_C_string());
1176 args->push_receiver(h_recv); // Push jobject handle
1177
1178 // Fill out JavaCallArguments object
1179 args->iterate( Fingerprinter(method).fingerprint() );
1180 // Initialize result type
1181 result->set_type(args->get_ret_type());
1182
1183 // Invoke the method. Result is returned as oop.
1184 JavaCalls::call(result, method, &java_args, CHECK);
1185
1186 // Convert result
1187 if (is_reference_type(result->get_type())) {
1188 result->set_jobject(JNIHandles::make_local(env, (oop) result->get_jobject()));
1189 }
1190 }
1191
1192
1193 static instanceOop alloc_object(jclass clazz, TRAPS) {
1194 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz));
1195 if (k == NULL) {
1196 ResourceMark rm(THREAD);
1197 THROW_(vmSymbols::java_lang_InstantiationException(), NULL);
1198 }
1199 k->check_valid_for_instantiation(false, CHECK_NULL);
1200 k->initialize(CHECK_NULL);
1201 instanceOop ih = InstanceKlass::cast(k)->allocate_instance(THREAD);
1202 return ih;
1203 }
1204
1205 DT_RETURN_MARK_DECL(AllocObject, jobject
1206 , HOTSPOT_JNI_ALLOCOBJECT_RETURN(_ret_ref));
1207
1208 JNI_ENTRY(jobject, jni_AllocObject(JNIEnv *env, jclass clazz))
1209 JNIWrapper("AllocObject");
1210
1211 HOTSPOT_JNI_ALLOCOBJECT_ENTRY(env, clazz);
1212
1213 jobject ret = NULL;
1214 DT_RETURN_MARK(AllocObject, jobject, (const jobject&)ret);
1215
1216 instanceOop i = alloc_object(clazz, CHECK_NULL);
1217 ret = JNIHandles::make_local(env, i);
1218 return ret;
1219 JNI_END
1220
1221 DT_RETURN_MARK_DECL(NewObjectA, jobject
1222 , HOTSPOT_JNI_NEWOBJECTA_RETURN(_ret_ref));
1223
1224 JNI_ENTRY(jobject, jni_NewObjectA(JNIEnv *env, jclass clazz, jmethodID methodID, const jvalue *args))
1225 JNIWrapper("NewObjectA");
1226
1227 HOTSPOT_JNI_NEWOBJECTA_ENTRY(env, clazz, (uintptr_t) methodID);
1228
1229 jobject obj = NULL;
1230 DT_RETURN_MARK(NewObjectA, jobject, (const jobject)obj);
1231
1232 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz));
1233 if (k == NULL) {
1234 ResourceMark rm(THREAD);
1235 THROW_(vmSymbols::java_lang_InstantiationException(), NULL);
1236 }
1237
1238 if (!k->is_value()) {
1239 instanceOop i = alloc_object(clazz, CHECK_NULL);
1240 obj = JNIHandles::make_local(env, i);
1241 JavaValue jvalue(T_VOID);
1242 JNI_ArgumentPusherArray ap(methodID, args);
1243 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_NULL);
1244 } else {
1245 JavaValue jvalue(T_VALUETYPE);
1246 JNI_ArgumentPusherArray ap(methodID, args);
1247 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK_NULL);
1248 obj = jvalue.get_jobject();
1249 }
1250 return obj;
1251 JNI_END
1252
1253
1254 DT_RETURN_MARK_DECL(NewObjectV, jobject
1255 , HOTSPOT_JNI_NEWOBJECTV_RETURN(_ret_ref));
1256
1257 JNI_ENTRY(jobject, jni_NewObjectV(JNIEnv *env, jclass clazz, jmethodID methodID, va_list args))
1258 JNIWrapper("NewObjectV");
1259
1260 HOTSPOT_JNI_NEWOBJECTV_ENTRY(env, clazz, (uintptr_t) methodID);
1261
1262 jobject obj = NULL;
1263 DT_RETURN_MARK(NewObjectV, jobject, (const jobject&)obj);
1264
1265 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz));
1266 if (k == NULL) {
1267 ResourceMark rm(THREAD);
1268 THROW_(vmSymbols::java_lang_InstantiationException(), NULL);
1269 }
1270
1271 if (!k->is_value()) {
1272 instanceOop i = alloc_object(clazz, CHECK_NULL);
1273 obj = JNIHandles::make_local(env, i);
1274 JavaValue jvalue(T_VOID);
1275 JNI_ArgumentPusherVaArg ap(methodID, args);
1276 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_NULL);
1277 } else {
1278 JavaValue jvalue(T_VALUETYPE);
1279 JNI_ArgumentPusherVaArg ap(methodID, args);
1280 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK_NULL);
1281 obj = jvalue.get_jobject();
1282 }
1283 return obj;
1284 JNI_END
1285
1286
1287 DT_RETURN_MARK_DECL(NewObject, jobject
1288 , HOTSPOT_JNI_NEWOBJECT_RETURN(_ret_ref));
1289
1290 JNI_ENTRY(jobject, jni_NewObject(JNIEnv *env, jclass clazz, jmethodID methodID, ...))
1291 JNIWrapper("NewObject");
1292
1293 HOTSPOT_JNI_NEWOBJECT_ENTRY(env, clazz, (uintptr_t) methodID);
1294
1295 jobject obj = NULL;
1296 DT_RETURN_MARK(NewObject, jobject, (const jobject&)obj);
1297
1298 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz));
1299 if (k == NULL) {
1300 ResourceMark rm(THREAD);
1301 THROW_(vmSymbols::java_lang_InstantiationException(), NULL);
1302 }
1303
1304 if (!k->is_value()) {
1305 instanceOop i = alloc_object(clazz, CHECK_NULL);
1306 obj = JNIHandles::make_local(env, i);
1307 va_list args;
1308 va_start(args, methodID);
1309 JavaValue jvalue(T_VOID);
1310 JNI_ArgumentPusherVaArg ap(methodID, args);
1311 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_NULL);
1312 va_end(args);
1313 } else {
1314 va_list args;
1315 va_start(args, methodID);
1316 JavaValue jvalue(T_VALUETYPE);
1317 JNI_ArgumentPusherVaArg ap(methodID, args);
1318 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK_NULL);
1319 va_end(args);
1320 obj = jvalue.get_jobject();
1321 }
1322 return obj;
1323 JNI_END
1324
1325
1326 JNI_ENTRY(jclass, jni_GetObjectClass(JNIEnv *env, jobject obj))
1327 JNIWrapper("GetObjectClass");
1328
1329 HOTSPOT_JNI_GETOBJECTCLASS_ENTRY(env, obj);
1330
1331 Klass* k = JNIHandles::resolve_non_null(obj)->klass();
1332 jclass ret =
1333 (jclass) JNIHandles::make_local(env, k->java_mirror());
1334
1335 HOTSPOT_JNI_GETOBJECTCLASS_RETURN(ret);
1336 return ret;
1337 JNI_END
1338
1339 JNI_ENTRY_NO_PRESERVE(jboolean, jni_IsInstanceOf(JNIEnv *env, jobject obj, jclass clazz))
1340 JNIWrapper("IsInstanceOf");
1341
1342 HOTSPOT_JNI_ISINSTANCEOF_ENTRY(env, obj, clazz);
1343
1344 jboolean ret = JNI_TRUE;
1345 if (obj != NULL) {
1346 ret = JNI_FALSE;
1347 Klass* k = java_lang_Class::as_Klass(
1348 JNIHandles::resolve_non_null(clazz));
1349 if (k != NULL) {
1350 ret = JNIHandles::resolve_non_null(obj)->is_a(k) ? JNI_TRUE : JNI_FALSE;
1351 }
1352 }
1353
1354 HOTSPOT_JNI_ISINSTANCEOF_RETURN(ret);
1355 return ret;
1356 JNI_END
1357
1358
1359 static jmethodID get_method_id(JNIEnv *env, jclass clazz, const char *name_str,
1360 const char *sig, bool is_static, TRAPS) {
1361 // %%%% This code should probably just call into a method in the LinkResolver
1362 //
1363 // The class should have been loaded (we have an instance of the class
1364 // passed in) so the method and signature should already be in the symbol
1365 // table. If they're not there, the method doesn't exist.
1366 const char *name_to_probe = (name_str == NULL)
1367 ? vmSymbols::object_initializer_name()->as_C_string()
1368 : name_str;
1369 TempNewSymbol name = SymbolTable::probe(name_to_probe, (int)strlen(name_to_probe));
1370 TempNewSymbol signature = SymbolTable::probe(sig, (int)strlen(sig));
1371
1372 if (name == NULL || signature == NULL) {
1373 THROW_MSG_0(vmSymbols::java_lang_NoSuchMethodError(), name_str);
1374 }
1375
1376 Klass* klass = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz));
1377
1378 // Throw a NoSuchMethodError exception if we have an instance of a
1379 // primitive java.lang.Class
1380 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(clazz))) {
1381 ResourceMark rm;
1382 THROW_MSG_0(vmSymbols::java_lang_NoSuchMethodError(), err_msg("%s%s.%s%s", is_static ? "static " : "", klass->signature_name(), name_str, sig));
1383 }
1384
1385 // Make sure class is linked and initialized before handing id's out to
1386 // Method*s.
1387 klass->initialize(CHECK_NULL);
1388
1389 Method* m;
1390 if (name == vmSymbols::object_initializer_name() ||
1391 name == vmSymbols::class_initializer_name()) {
1392 // Never search superclasses for constructors
1393 if (klass->is_instance_klass()) {
1394 m = InstanceKlass::cast(klass)->find_method(name, signature);
1395 } else {
1396 m = NULL;
1397 }
1398 } else {
1399 m = klass->lookup_method(name, signature);
1400 if (m == NULL && klass->is_instance_klass()) {
1401 m = InstanceKlass::cast(klass)->lookup_method_in_ordered_interfaces(name, signature);
1402 }
1403 }
1404 if (m == NULL || (m->is_static() != is_static)) {
1405 ResourceMark rm;
1406 THROW_MSG_0(vmSymbols::java_lang_NoSuchMethodError(), err_msg("%s%s.%s%s", is_static ? "static " : "", klass->signature_name(), name_str, sig));
1407 }
1408 return m->jmethod_id();
1409 }
1410
1411
1412 JNI_ENTRY(jmethodID, jni_GetMethodID(JNIEnv *env, jclass clazz,
1413 const char *name, const char *sig))
1414 JNIWrapper("GetMethodID");
1415 HOTSPOT_JNI_GETMETHODID_ENTRY(env, clazz, (char *) name, (char *) sig);
1416 jmethodID ret = get_method_id(env, clazz, name, sig, false, thread);
1417 HOTSPOT_JNI_GETMETHODID_RETURN((uintptr_t) ret);
1418 return ret;
1419 JNI_END
1420
1421
1422 JNI_ENTRY(jmethodID, jni_GetStaticMethodID(JNIEnv *env, jclass clazz,
1423 const char *name, const char *sig))
1424 JNIWrapper("GetStaticMethodID");
1425 HOTSPOT_JNI_GETSTATICMETHODID_ENTRY(env, (char *) clazz, (char *) name, (char *)sig);
1426 jmethodID ret = get_method_id(env, clazz, name, sig, true, thread);
1427 HOTSPOT_JNI_GETSTATICMETHODID_RETURN((uintptr_t) ret);
1428 return ret;
1429 JNI_END
1430
1431
1432
1433 //
1434 // Calling Methods
1435 //
1436
1437
1438 #define DEFINE_CALLMETHOD(ResultType, Result, Tag \
1439 , EntryProbe, ReturnProbe) \
1440 \
1441 DT_RETURN_MARK_DECL_FOR(Result, Call##Result##Method, ResultType \
1442 , ReturnProbe); \
1443 \
1444 JNI_ENTRY(ResultType, \
1445 jni_Call##Result##Method(JNIEnv *env, jobject obj, jmethodID methodID, ...)) \
1446 JNIWrapper("Call" XSTR(Result) "Method"); \
1447 \
1448 EntryProbe; \
1449 ResultType ret = 0;\
1450 DT_RETURN_MARK_FOR(Result, Call##Result##Method, ResultType, \
1451 (const ResultType&)ret);\
1452 \
1453 va_list args; \
1454 va_start(args, methodID); \
1455 JavaValue jvalue(Tag); \
1456 JNI_ArgumentPusherVaArg ap(methodID, args); \
1457 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK_0); \
1458 va_end(args); \
1459 ret = jvalue.get_##ResultType(); \
1460 return ret;\
1461 JNI_END
1462
1463 // the runtime type of subword integral basic types is integer
1464 DEFINE_CALLMETHOD(jboolean, Boolean, T_BOOLEAN
1465 , HOTSPOT_JNI_CALLBOOLEANMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1466 HOTSPOT_JNI_CALLBOOLEANMETHOD_RETURN(_ret_ref))
1467 DEFINE_CALLMETHOD(jbyte, Byte, T_BYTE
1468 , HOTSPOT_JNI_CALLBYTEMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1469 HOTSPOT_JNI_CALLBYTEMETHOD_RETURN(_ret_ref))
1470 DEFINE_CALLMETHOD(jchar, Char, T_CHAR
1471 , HOTSPOT_JNI_CALLCHARMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1472 HOTSPOT_JNI_CALLCHARMETHOD_RETURN(_ret_ref))
1473 DEFINE_CALLMETHOD(jshort, Short, T_SHORT
1474 , HOTSPOT_JNI_CALLSHORTMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1475 HOTSPOT_JNI_CALLSHORTMETHOD_RETURN(_ret_ref))
1476
1477 DEFINE_CALLMETHOD(jobject, Object, T_OBJECT
1478 , HOTSPOT_JNI_CALLOBJECTMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1479 HOTSPOT_JNI_CALLOBJECTMETHOD_RETURN(_ret_ref))
1480 DEFINE_CALLMETHOD(jint, Int, T_INT,
1481 HOTSPOT_JNI_CALLINTMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1482 HOTSPOT_JNI_CALLINTMETHOD_RETURN(_ret_ref))
1483 DEFINE_CALLMETHOD(jlong, Long, T_LONG
1484 , HOTSPOT_JNI_CALLLONGMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1485 HOTSPOT_JNI_CALLLONGMETHOD_RETURN(_ret_ref))
1486 // Float and double probes don't return value because dtrace doesn't currently support it
1487 DEFINE_CALLMETHOD(jfloat, Float, T_FLOAT
1488 , HOTSPOT_JNI_CALLFLOATMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1489 HOTSPOT_JNI_CALLFLOATMETHOD_RETURN())
1490 DEFINE_CALLMETHOD(jdouble, Double, T_DOUBLE
1491 , HOTSPOT_JNI_CALLDOUBLEMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1492 HOTSPOT_JNI_CALLDOUBLEMETHOD_RETURN())
1493
1494 #define DEFINE_CALLMETHODV(ResultType, Result, Tag \
1495 , EntryProbe, ReturnProbe) \
1496 \
1497 DT_RETURN_MARK_DECL_FOR(Result, Call##Result##MethodV, ResultType \
1498 , ReturnProbe); \
1499 \
1500 JNI_ENTRY(ResultType, \
1501 jni_Call##Result##MethodV(JNIEnv *env, jobject obj, jmethodID methodID, va_list args)) \
1502 JNIWrapper("Call" XSTR(Result) "MethodV"); \
1503 \
1504 EntryProbe;\
1505 ResultType ret = 0;\
1506 DT_RETURN_MARK_FOR(Result, Call##Result##MethodV, ResultType, \
1507 (const ResultType&)ret);\
1508 \
1509 JavaValue jvalue(Tag); \
1510 JNI_ArgumentPusherVaArg ap(methodID, args); \
1511 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK_0); \
1512 ret = jvalue.get_##ResultType(); \
1513 return ret;\
1514 JNI_END
1515
1516 // the runtime type of subword integral basic types is integer
1517 DEFINE_CALLMETHODV(jboolean, Boolean, T_BOOLEAN
1518 , HOTSPOT_JNI_CALLBOOLEANMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1519 HOTSPOT_JNI_CALLBOOLEANMETHODV_RETURN(_ret_ref))
1520 DEFINE_CALLMETHODV(jbyte, Byte, T_BYTE
1521 , HOTSPOT_JNI_CALLBYTEMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1522 HOTSPOT_JNI_CALLBYTEMETHODV_RETURN(_ret_ref))
1523 DEFINE_CALLMETHODV(jchar, Char, T_CHAR
1524 , HOTSPOT_JNI_CALLCHARMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1525 HOTSPOT_JNI_CALLCHARMETHODV_RETURN(_ret_ref))
1526 DEFINE_CALLMETHODV(jshort, Short, T_SHORT
1527 , HOTSPOT_JNI_CALLSHORTMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1528 HOTSPOT_JNI_CALLSHORTMETHODV_RETURN(_ret_ref))
1529
1530 DEFINE_CALLMETHODV(jobject, Object, T_OBJECT
1531 , HOTSPOT_JNI_CALLOBJECTMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1532 HOTSPOT_JNI_CALLOBJECTMETHODV_RETURN(_ret_ref))
1533 DEFINE_CALLMETHODV(jint, Int, T_INT,
1534 HOTSPOT_JNI_CALLINTMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1535 HOTSPOT_JNI_CALLINTMETHODV_RETURN(_ret_ref))
1536 DEFINE_CALLMETHODV(jlong, Long, T_LONG
1537 , HOTSPOT_JNI_CALLLONGMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1538 HOTSPOT_JNI_CALLLONGMETHODV_RETURN(_ret_ref))
1539 // Float and double probes don't return value because dtrace doesn't currently support it
1540 DEFINE_CALLMETHODV(jfloat, Float, T_FLOAT
1541 , HOTSPOT_JNI_CALLFLOATMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1542 HOTSPOT_JNI_CALLFLOATMETHODV_RETURN())
1543 DEFINE_CALLMETHODV(jdouble, Double, T_DOUBLE
1544 , HOTSPOT_JNI_CALLDOUBLEMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1545 HOTSPOT_JNI_CALLDOUBLEMETHODV_RETURN())
1546
1547 #define DEFINE_CALLMETHODA(ResultType, Result, Tag \
1548 , EntryProbe, ReturnProbe) \
1549 \
1550 DT_RETURN_MARK_DECL_FOR(Result, Call##Result##MethodA, ResultType \
1551 , ReturnProbe); \
1552 \
1553 JNI_ENTRY(ResultType, \
1554 jni_Call##Result##MethodA(JNIEnv *env, jobject obj, jmethodID methodID, const jvalue *args)) \
1555 JNIWrapper("Call" XSTR(Result) "MethodA"); \
1556 EntryProbe; \
1557 ResultType ret = 0;\
1558 DT_RETURN_MARK_FOR(Result, Call##Result##MethodA, ResultType, \
1559 (const ResultType&)ret);\
1560 \
1561 JavaValue jvalue(Tag); \
1562 JNI_ArgumentPusherArray ap(methodID, args); \
1563 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK_0); \
1564 ret = jvalue.get_##ResultType(); \
1565 return ret;\
1566 JNI_END
1567
1568 // the runtime type of subword integral basic types is integer
1569 DEFINE_CALLMETHODA(jboolean, Boolean, T_BOOLEAN
1570 , HOTSPOT_JNI_CALLBOOLEANMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1571 HOTSPOT_JNI_CALLBOOLEANMETHODA_RETURN(_ret_ref))
1572 DEFINE_CALLMETHODA(jbyte, Byte, T_BYTE
1573 , HOTSPOT_JNI_CALLBYTEMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1574 HOTSPOT_JNI_CALLBYTEMETHODA_RETURN(_ret_ref))
1575 DEFINE_CALLMETHODA(jchar, Char, T_CHAR
1576 , HOTSPOT_JNI_CALLCHARMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1577 HOTSPOT_JNI_CALLCHARMETHODA_RETURN(_ret_ref))
1578 DEFINE_CALLMETHODA(jshort, Short, T_SHORT
1579 , HOTSPOT_JNI_CALLSHORTMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1580 HOTSPOT_JNI_CALLSHORTMETHODA_RETURN(_ret_ref))
1581
1582 DEFINE_CALLMETHODA(jobject, Object, T_OBJECT
1583 , HOTSPOT_JNI_CALLOBJECTMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1584 HOTSPOT_JNI_CALLOBJECTMETHODA_RETURN(_ret_ref))
1585 DEFINE_CALLMETHODA(jint, Int, T_INT,
1586 HOTSPOT_JNI_CALLINTMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1587 HOTSPOT_JNI_CALLINTMETHODA_RETURN(_ret_ref))
1588 DEFINE_CALLMETHODA(jlong, Long, T_LONG
1589 , HOTSPOT_JNI_CALLLONGMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1590 HOTSPOT_JNI_CALLLONGMETHODA_RETURN(_ret_ref))
1591 // Float and double probes don't return value because dtrace doesn't currently support it
1592 DEFINE_CALLMETHODA(jfloat, Float, T_FLOAT
1593 , HOTSPOT_JNI_CALLFLOATMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1594 HOTSPOT_JNI_CALLFLOATMETHODA_RETURN())
1595 DEFINE_CALLMETHODA(jdouble, Double, T_DOUBLE
1596 , HOTSPOT_JNI_CALLDOUBLEMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1597 HOTSPOT_JNI_CALLDOUBLEMETHODA_RETURN())
1598
1599 DT_VOID_RETURN_MARK_DECL(CallVoidMethod, HOTSPOT_JNI_CALLVOIDMETHOD_RETURN());
1600 DT_VOID_RETURN_MARK_DECL(CallVoidMethodV, HOTSPOT_JNI_CALLVOIDMETHODV_RETURN());
1601 DT_VOID_RETURN_MARK_DECL(CallVoidMethodA, HOTSPOT_JNI_CALLVOIDMETHODA_RETURN());
1602
1603
1604 JNI_ENTRY(void, jni_CallVoidMethod(JNIEnv *env, jobject obj, jmethodID methodID, ...))
1605 JNIWrapper("CallVoidMethod");
1606 HOTSPOT_JNI_CALLVOIDMETHOD_ENTRY(env, obj, (uintptr_t) methodID);
1607 DT_VOID_RETURN_MARK(CallVoidMethod);
1608
1609 va_list args;
1610 va_start(args, methodID);
1611 JavaValue jvalue(T_VOID);
1612 JNI_ArgumentPusherVaArg ap(methodID, args);
1613 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK);
1614 va_end(args);
1615 JNI_END
1616
1617
1618 JNI_ENTRY(void, jni_CallVoidMethodV(JNIEnv *env, jobject obj, jmethodID methodID, va_list args))
1619 JNIWrapper("CallVoidMethodV");
1620 HOTSPOT_JNI_CALLVOIDMETHODV_ENTRY(env, obj, (uintptr_t) methodID);
1621 DT_VOID_RETURN_MARK(CallVoidMethodV);
1622
1623 JavaValue jvalue(T_VOID);
1624 JNI_ArgumentPusherVaArg ap(methodID, args);
1625 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK);
1626 JNI_END
1627
1628
1629 JNI_ENTRY(void, jni_CallVoidMethodA(JNIEnv *env, jobject obj, jmethodID methodID, const jvalue *args))
1630 JNIWrapper("CallVoidMethodA");
1631 HOTSPOT_JNI_CALLVOIDMETHODA_ENTRY(env, obj, (uintptr_t) methodID);
1632 DT_VOID_RETURN_MARK(CallVoidMethodA);
1633
1634 JavaValue jvalue(T_VOID);
1635 JNI_ArgumentPusherArray ap(methodID, args);
1636 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK);
1637 JNI_END
1638
1639
1640
1641 #define DEFINE_CALLNONVIRTUALMETHOD(ResultType, Result, Tag \
1642 , EntryProbe, ReturnProbe) \
1643 \
1644 DT_RETURN_MARK_DECL_FOR(Result, CallNonvirtual##Result##Method, ResultType \
1645 , ReturnProbe);\
1646 \
1647 JNI_ENTRY(ResultType, \
1648 jni_CallNonvirtual##Result##Method(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, ...)) \
1649 JNIWrapper("CallNonvitual" XSTR(Result) "Method"); \
1650 \
1651 EntryProbe;\
1652 ResultType ret;\
1653 DT_RETURN_MARK_FOR(Result, CallNonvirtual##Result##Method, ResultType, \
1654 (const ResultType&)ret);\
1655 \
1656 va_list args; \
1657 va_start(args, methodID); \
1658 JavaValue jvalue(Tag); \
1659 JNI_ArgumentPusherVaArg ap(methodID, args); \
1660 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_0); \
1661 va_end(args); \
1662 ret = jvalue.get_##ResultType(); \
1663 return ret;\
1664 JNI_END
1665
1666 // the runtime type of subword integral basic types is integer
1667 DEFINE_CALLNONVIRTUALMETHOD(jboolean, Boolean, T_BOOLEAN
1668 , HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1669 HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHOD_RETURN(_ret_ref))
1670 DEFINE_CALLNONVIRTUALMETHOD(jbyte, Byte, T_BYTE
1671 , HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1672 HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHOD_RETURN(_ret_ref))
1673 DEFINE_CALLNONVIRTUALMETHOD(jchar, Char, T_CHAR
1674 , HOTSPOT_JNI_CALLNONVIRTUALCHARMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1675 HOTSPOT_JNI_CALLNONVIRTUALCHARMETHOD_RETURN(_ret_ref))
1676 DEFINE_CALLNONVIRTUALMETHOD(jshort, Short, T_SHORT
1677 , HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1678 HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHOD_RETURN(_ret_ref))
1679
1680 DEFINE_CALLNONVIRTUALMETHOD(jobject, Object, T_OBJECT
1681 , HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1682 HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHOD_RETURN(_ret_ref))
1683 DEFINE_CALLNONVIRTUALMETHOD(jint, Int, T_INT
1684 , HOTSPOT_JNI_CALLNONVIRTUALINTMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1685 HOTSPOT_JNI_CALLNONVIRTUALINTMETHOD_RETURN(_ret_ref))
1686 DEFINE_CALLNONVIRTUALMETHOD(jlong, Long, T_LONG
1687 , HOTSPOT_JNI_CALLNONVIRTUALLONGMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1688 // Float and double probes don't return value because dtrace doesn't currently support it
1689 HOTSPOT_JNI_CALLNONVIRTUALLONGMETHOD_RETURN(_ret_ref))
1690 DEFINE_CALLNONVIRTUALMETHOD(jfloat, Float, T_FLOAT
1691 , HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1692 HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHOD_RETURN())
1693 DEFINE_CALLNONVIRTUALMETHOD(jdouble, Double, T_DOUBLE
1694 , HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1695 HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHOD_RETURN())
1696
1697 #define DEFINE_CALLNONVIRTUALMETHODV(ResultType, Result, Tag \
1698 , EntryProbe, ReturnProbe) \
1699 \
1700 DT_RETURN_MARK_DECL_FOR(Result, CallNonvirtual##Result##MethodV, ResultType \
1701 , ReturnProbe);\
1702 \
1703 JNI_ENTRY(ResultType, \
1704 jni_CallNonvirtual##Result##MethodV(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, va_list args)) \
1705 JNIWrapper("CallNonvitual" XSTR(Result) "MethodV"); \
1706 \
1707 EntryProbe;\
1708 ResultType ret;\
1709 DT_RETURN_MARK_FOR(Result, CallNonvirtual##Result##MethodV, ResultType, \
1710 (const ResultType&)ret);\
1711 \
1712 JavaValue jvalue(Tag); \
1713 JNI_ArgumentPusherVaArg ap(methodID, args); \
1714 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_0); \
1715 ret = jvalue.get_##ResultType(); \
1716 return ret;\
1717 JNI_END
1718
1719 // the runtime type of subword integral basic types is integer
1720 DEFINE_CALLNONVIRTUALMETHODV(jboolean, Boolean, T_BOOLEAN
1721 , HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1722 HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHODV_RETURN(_ret_ref))
1723 DEFINE_CALLNONVIRTUALMETHODV(jbyte, Byte, T_BYTE
1724 , HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1725 HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHODV_RETURN(_ret_ref))
1726 DEFINE_CALLNONVIRTUALMETHODV(jchar, Char, T_CHAR
1727 , HOTSPOT_JNI_CALLNONVIRTUALCHARMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1728 HOTSPOT_JNI_CALLNONVIRTUALCHARMETHODV_RETURN(_ret_ref))
1729 DEFINE_CALLNONVIRTUALMETHODV(jshort, Short, T_SHORT
1730 , HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1731 HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHODV_RETURN(_ret_ref))
1732
1733 DEFINE_CALLNONVIRTUALMETHODV(jobject, Object, T_OBJECT
1734 , HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1735 HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHODV_RETURN(_ret_ref))
1736 DEFINE_CALLNONVIRTUALMETHODV(jint, Int, T_INT
1737 , HOTSPOT_JNI_CALLNONVIRTUALINTMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1738 HOTSPOT_JNI_CALLNONVIRTUALINTMETHODV_RETURN(_ret_ref))
1739 DEFINE_CALLNONVIRTUALMETHODV(jlong, Long, T_LONG
1740 , HOTSPOT_JNI_CALLNONVIRTUALLONGMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1741 // Float and double probes don't return value because dtrace doesn't currently support it
1742 HOTSPOT_JNI_CALLNONVIRTUALLONGMETHODV_RETURN(_ret_ref))
1743 DEFINE_CALLNONVIRTUALMETHODV(jfloat, Float, T_FLOAT
1744 , HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1745 HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHODV_RETURN())
1746 DEFINE_CALLNONVIRTUALMETHODV(jdouble, Double, T_DOUBLE
1747 , HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1748 HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHODV_RETURN())
1749
1750 #define DEFINE_CALLNONVIRTUALMETHODA(ResultType, Result, Tag \
1751 , EntryProbe, ReturnProbe) \
1752 \
1753 DT_RETURN_MARK_DECL_FOR(Result, CallNonvirtual##Result##MethodA, ResultType \
1754 , ReturnProbe);\
1755 \
1756 JNI_ENTRY(ResultType, \
1757 jni_CallNonvirtual##Result##MethodA(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, const jvalue *args)) \
1758 JNIWrapper("CallNonvitual" XSTR(Result) "MethodA"); \
1759 \
1760 EntryProbe;\
1761 ResultType ret;\
1762 DT_RETURN_MARK_FOR(Result, CallNonvirtual##Result##MethodA, ResultType, \
1763 (const ResultType&)ret);\
1764 \
1765 JavaValue jvalue(Tag); \
1766 JNI_ArgumentPusherArray ap(methodID, args); \
1767 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_0); \
1768 ret = jvalue.get_##ResultType(); \
1769 return ret;\
1770 JNI_END
1771
1772 // the runtime type of subword integral basic types is integer
1773 DEFINE_CALLNONVIRTUALMETHODA(jboolean, Boolean, T_BOOLEAN
1774 , HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1775 HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHODA_RETURN(_ret_ref))
1776 DEFINE_CALLNONVIRTUALMETHODA(jbyte, Byte, T_BYTE
1777 , HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1778 HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHODA_RETURN(_ret_ref))
1779 DEFINE_CALLNONVIRTUALMETHODA(jchar, Char, T_CHAR
1780 , HOTSPOT_JNI_CALLNONVIRTUALCHARMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1781 HOTSPOT_JNI_CALLNONVIRTUALCHARMETHODA_RETURN(_ret_ref))
1782 DEFINE_CALLNONVIRTUALMETHODA(jshort, Short, T_SHORT
1783 , HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1784 HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHODA_RETURN(_ret_ref))
1785
1786 DEFINE_CALLNONVIRTUALMETHODA(jobject, Object, T_OBJECT
1787 , HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1788 HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHODA_RETURN(_ret_ref))
1789 DEFINE_CALLNONVIRTUALMETHODA(jint, Int, T_INT
1790 , HOTSPOT_JNI_CALLNONVIRTUALINTMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1791 HOTSPOT_JNI_CALLNONVIRTUALINTMETHODA_RETURN(_ret_ref))
1792 DEFINE_CALLNONVIRTUALMETHODA(jlong, Long, T_LONG
1793 , HOTSPOT_JNI_CALLNONVIRTUALLONGMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1794 // Float and double probes don't return value because dtrace doesn't currently support it
1795 HOTSPOT_JNI_CALLNONVIRTUALLONGMETHODA_RETURN(_ret_ref))
1796 DEFINE_CALLNONVIRTUALMETHODA(jfloat, Float, T_FLOAT
1797 , HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1798 HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHODA_RETURN())
1799 DEFINE_CALLNONVIRTUALMETHODA(jdouble, Double, T_DOUBLE
1800 , HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1801 HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHODA_RETURN())
1802
1803 DT_VOID_RETURN_MARK_DECL(CallNonvirtualVoidMethod
1804 , HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHOD_RETURN());
1805 DT_VOID_RETURN_MARK_DECL(CallNonvirtualVoidMethodV
1806 , HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHODV_RETURN());
1807 DT_VOID_RETURN_MARK_DECL(CallNonvirtualVoidMethodA
1808 , HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHODA_RETURN());
1809
1810 JNI_ENTRY(void, jni_CallNonvirtualVoidMethod(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, ...))
1811 JNIWrapper("CallNonvirtualVoidMethod");
1812
1813 HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHOD_ENTRY(env, obj, cls, (uintptr_t) methodID);
1814 DT_VOID_RETURN_MARK(CallNonvirtualVoidMethod);
1815
1816 va_list args;
1817 va_start(args, methodID);
1818 JavaValue jvalue(T_VOID);
1819 JNI_ArgumentPusherVaArg ap(methodID, args);
1820 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK);
1821 va_end(args);
1822 JNI_END
1823
1824
1825 JNI_ENTRY(void, jni_CallNonvirtualVoidMethodV(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, va_list args))
1826 JNIWrapper("CallNonvirtualVoidMethodV");
1827
1828 HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHODV_ENTRY(
1829 env, obj, cls, (uintptr_t) methodID);
1830 DT_VOID_RETURN_MARK(CallNonvirtualVoidMethodV);
1831
1832 JavaValue jvalue(T_VOID);
1833 JNI_ArgumentPusherVaArg ap(methodID, args);
1834 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK);
1835 JNI_END
1836
1837
1838 JNI_ENTRY(void, jni_CallNonvirtualVoidMethodA(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, const jvalue *args))
1839 JNIWrapper("CallNonvirtualVoidMethodA");
1840 HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHODA_ENTRY(
1841 env, obj, cls, (uintptr_t) methodID);
1842 DT_VOID_RETURN_MARK(CallNonvirtualVoidMethodA);
1843 JavaValue jvalue(T_VOID);
1844 JNI_ArgumentPusherArray ap(methodID, args);
1845 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK);
1846 JNI_END
1847
1848
1849
1850 #define DEFINE_CALLSTATICMETHOD(ResultType, Result, Tag \
1851 , EntryProbe, ResultProbe) \
1852 \
1853 DT_RETURN_MARK_DECL_FOR(Result, CallStatic##Result##Method, ResultType \
1854 , ResultProbe); \
1855 \
1856 JNI_ENTRY(ResultType, \
1857 jni_CallStatic##Result##Method(JNIEnv *env, jclass cls, jmethodID methodID, ...)) \
1858 JNIWrapper("CallStatic" XSTR(Result) "Method"); \
1859 \
1860 EntryProbe; \
1861 ResultType ret = 0;\
1862 DT_RETURN_MARK_FOR(Result, CallStatic##Result##Method, ResultType, \
1863 (const ResultType&)ret);\
1864 \
1865 va_list args; \
1866 va_start(args, methodID); \
1867 JavaValue jvalue(Tag); \
1868 JNI_ArgumentPusherVaArg ap(methodID, args); \
1869 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK_0); \
1870 va_end(args); \
1871 ret = jvalue.get_##ResultType(); \
1872 return ret;\
1873 JNI_END
1874
1875 // the runtime type of subword integral basic types is integer
1876 DEFINE_CALLSTATICMETHOD(jboolean, Boolean, T_BOOLEAN
1877 , HOTSPOT_JNI_CALLSTATICBOOLEANMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1878 HOTSPOT_JNI_CALLSTATICBOOLEANMETHOD_RETURN(_ret_ref));
1879 DEFINE_CALLSTATICMETHOD(jbyte, Byte, T_BYTE
1880 , HOTSPOT_JNI_CALLSTATICBYTEMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1881 HOTSPOT_JNI_CALLSTATICBYTEMETHOD_RETURN(_ret_ref));
1882 DEFINE_CALLSTATICMETHOD(jchar, Char, T_CHAR
1883 , HOTSPOT_JNI_CALLSTATICCHARMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1884 HOTSPOT_JNI_CALLSTATICCHARMETHOD_RETURN(_ret_ref));
1885 DEFINE_CALLSTATICMETHOD(jshort, Short, T_SHORT
1886 , HOTSPOT_JNI_CALLSTATICSHORTMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1887 HOTSPOT_JNI_CALLSTATICSHORTMETHOD_RETURN(_ret_ref));
1888
1889 DEFINE_CALLSTATICMETHOD(jobject, Object, T_OBJECT
1890 , HOTSPOT_JNI_CALLSTATICOBJECTMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1891 HOTSPOT_JNI_CALLSTATICOBJECTMETHOD_RETURN(_ret_ref));
1892 DEFINE_CALLSTATICMETHOD(jint, Int, T_INT
1893 , HOTSPOT_JNI_CALLSTATICINTMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1894 HOTSPOT_JNI_CALLSTATICINTMETHOD_RETURN(_ret_ref));
1895 DEFINE_CALLSTATICMETHOD(jlong, Long, T_LONG
1896 , HOTSPOT_JNI_CALLSTATICLONGMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1897 HOTSPOT_JNI_CALLSTATICLONGMETHOD_RETURN(_ret_ref));
1898 // Float and double probes don't return value because dtrace doesn't currently support it
1899 DEFINE_CALLSTATICMETHOD(jfloat, Float, T_FLOAT
1900 , HOTSPOT_JNI_CALLSTATICFLOATMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1901 HOTSPOT_JNI_CALLSTATICFLOATMETHOD_RETURN());
1902 DEFINE_CALLSTATICMETHOD(jdouble, Double, T_DOUBLE
1903 , HOTSPOT_JNI_CALLSTATICDOUBLEMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1904 HOTSPOT_JNI_CALLSTATICDOUBLEMETHOD_RETURN());
1905
1906 #define DEFINE_CALLSTATICMETHODV(ResultType, Result, Tag \
1907 , EntryProbe, ResultProbe) \
1908 \
1909 DT_RETURN_MARK_DECL_FOR(Result, CallStatic##Result##MethodV, ResultType \
1910 , ResultProbe); \
1911 \
1912 JNI_ENTRY(ResultType, \
1913 jni_CallStatic##Result##MethodV(JNIEnv *env, jclass cls, jmethodID methodID, va_list args)) \
1914 JNIWrapper("CallStatic" XSTR(Result) "MethodV"); \
1915 \
1916 EntryProbe; \
1917 ResultType ret = 0;\
1918 DT_RETURN_MARK_FOR(Result, CallStatic##Result##MethodV, ResultType, \
1919 (const ResultType&)ret);\
1920 \
1921 JavaValue jvalue(Tag); \
1922 JNI_ArgumentPusherVaArg ap(methodID, args); \
1923 /* Make sure class is initialized before trying to invoke its method */ \
1924 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); \
1925 k->initialize(CHECK_0); \
1926 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK_0); \
1927 va_end(args); \
1928 ret = jvalue.get_##ResultType(); \
1929 return ret;\
1930 JNI_END
1931
1932 // the runtime type of subword integral basic types is integer
1933 DEFINE_CALLSTATICMETHODV(jboolean, Boolean, T_BOOLEAN
1934 , HOTSPOT_JNI_CALLSTATICBOOLEANMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1935 HOTSPOT_JNI_CALLSTATICBOOLEANMETHODV_RETURN(_ret_ref));
1936 DEFINE_CALLSTATICMETHODV(jbyte, Byte, T_BYTE
1937 , HOTSPOT_JNI_CALLSTATICBYTEMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1938 HOTSPOT_JNI_CALLSTATICBYTEMETHODV_RETURN(_ret_ref));
1939 DEFINE_CALLSTATICMETHODV(jchar, Char, T_CHAR
1940 , HOTSPOT_JNI_CALLSTATICCHARMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1941 HOTSPOT_JNI_CALLSTATICCHARMETHODV_RETURN(_ret_ref));
1942 DEFINE_CALLSTATICMETHODV(jshort, Short, T_SHORT
1943 , HOTSPOT_JNI_CALLSTATICSHORTMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1944 HOTSPOT_JNI_CALLSTATICSHORTMETHODV_RETURN(_ret_ref));
1945
1946 DEFINE_CALLSTATICMETHODV(jobject, Object, T_OBJECT
1947 , HOTSPOT_JNI_CALLSTATICOBJECTMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1948 HOTSPOT_JNI_CALLSTATICOBJECTMETHODV_RETURN(_ret_ref));
1949 DEFINE_CALLSTATICMETHODV(jint, Int, T_INT
1950 , HOTSPOT_JNI_CALLSTATICINTMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1951 HOTSPOT_JNI_CALLSTATICINTMETHODV_RETURN(_ret_ref));
1952 DEFINE_CALLSTATICMETHODV(jlong, Long, T_LONG
1953 , HOTSPOT_JNI_CALLSTATICLONGMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1954 HOTSPOT_JNI_CALLSTATICLONGMETHODV_RETURN(_ret_ref));
1955 // Float and double probes don't return value because dtrace doesn't currently support it
1956 DEFINE_CALLSTATICMETHODV(jfloat, Float, T_FLOAT
1957 , HOTSPOT_JNI_CALLSTATICFLOATMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1958 HOTSPOT_JNI_CALLSTATICFLOATMETHODV_RETURN());
1959 DEFINE_CALLSTATICMETHODV(jdouble, Double, T_DOUBLE
1960 , HOTSPOT_JNI_CALLSTATICDOUBLEMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1961 HOTSPOT_JNI_CALLSTATICDOUBLEMETHODV_RETURN());
1962
1963 #define DEFINE_CALLSTATICMETHODA(ResultType, Result, Tag \
1964 , EntryProbe, ResultProbe) \
1965 \
1966 DT_RETURN_MARK_DECL_FOR(Result, CallStatic##Result##MethodA, ResultType \
1967 , ResultProbe); \
1968 \
1969 JNI_ENTRY(ResultType, \
1970 jni_CallStatic##Result##MethodA(JNIEnv *env, jclass cls, jmethodID methodID, const jvalue *args)) \
1971 JNIWrapper("CallStatic" XSTR(Result) "MethodA"); \
1972 \
1973 EntryProbe; \
1974 ResultType ret = 0;\
1975 DT_RETURN_MARK_FOR(Result, CallStatic##Result##MethodA, ResultType, \
1976 (const ResultType&)ret);\
1977 \
1978 JavaValue jvalue(Tag); \
1979 JNI_ArgumentPusherArray ap(methodID, args); \
1980 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK_0); \
1981 ret = jvalue.get_##ResultType(); \
1982 return ret;\
1983 JNI_END
1984
1985 // the runtime type of subword integral basic types is integer
1986 DEFINE_CALLSTATICMETHODA(jboolean, Boolean, T_BOOLEAN
1987 , HOTSPOT_JNI_CALLSTATICBOOLEANMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1988 HOTSPOT_JNI_CALLSTATICBOOLEANMETHODA_RETURN(_ret_ref));
1989 DEFINE_CALLSTATICMETHODA(jbyte, Byte, T_BYTE
1990 , HOTSPOT_JNI_CALLSTATICBYTEMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1991 HOTSPOT_JNI_CALLSTATICBYTEMETHODA_RETURN(_ret_ref));
1992 DEFINE_CALLSTATICMETHODA(jchar, Char, T_CHAR
1993 , HOTSPOT_JNI_CALLSTATICCHARMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1994 HOTSPOT_JNI_CALLSTATICCHARMETHODA_RETURN(_ret_ref));
1995 DEFINE_CALLSTATICMETHODA(jshort, Short, T_SHORT
1996 , HOTSPOT_JNI_CALLSTATICSHORTMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1997 HOTSPOT_JNI_CALLSTATICSHORTMETHODA_RETURN(_ret_ref));
1998
1999 DEFINE_CALLSTATICMETHODA(jobject, Object, T_OBJECT
2000 , HOTSPOT_JNI_CALLSTATICOBJECTMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
2001 HOTSPOT_JNI_CALLSTATICOBJECTMETHODA_RETURN(_ret_ref));
2002 DEFINE_CALLSTATICMETHODA(jint, Int, T_INT
2003 , HOTSPOT_JNI_CALLSTATICINTMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
2004 HOTSPOT_JNI_CALLSTATICINTMETHODA_RETURN(_ret_ref));
2005 DEFINE_CALLSTATICMETHODA(jlong, Long, T_LONG
2006 , HOTSPOT_JNI_CALLSTATICLONGMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
2007 HOTSPOT_JNI_CALLSTATICLONGMETHODA_RETURN(_ret_ref));
2008 // Float and double probes don't return value because dtrace doesn't currently support it
2009 DEFINE_CALLSTATICMETHODA(jfloat, Float, T_FLOAT
2010 , HOTSPOT_JNI_CALLSTATICFLOATMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
2011 HOTSPOT_JNI_CALLSTATICFLOATMETHODA_RETURN());
2012 DEFINE_CALLSTATICMETHODA(jdouble, Double, T_DOUBLE
2013 , HOTSPOT_JNI_CALLSTATICDOUBLEMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
2014 HOTSPOT_JNI_CALLSTATICDOUBLEMETHODA_RETURN());
2015
2016 DT_VOID_RETURN_MARK_DECL(CallStaticVoidMethod
2017 , HOTSPOT_JNI_CALLSTATICVOIDMETHOD_RETURN());
2018 DT_VOID_RETURN_MARK_DECL(CallStaticVoidMethodV
2019 , HOTSPOT_JNI_CALLSTATICVOIDMETHODV_RETURN());
2020 DT_VOID_RETURN_MARK_DECL(CallStaticVoidMethodA
2021 , HOTSPOT_JNI_CALLSTATICVOIDMETHODA_RETURN());
2022
2023 JNI_ENTRY(void, jni_CallStaticVoidMethod(JNIEnv *env, jclass cls, jmethodID methodID, ...))
2024 JNIWrapper("CallStaticVoidMethod");
2025 HOTSPOT_JNI_CALLSTATICVOIDMETHOD_ENTRY(env, cls, (uintptr_t) methodID);
2026 DT_VOID_RETURN_MARK(CallStaticVoidMethod);
2027
2028 va_list args;
2029 va_start(args, methodID);
2030 JavaValue jvalue(T_VOID);
2031 JNI_ArgumentPusherVaArg ap(methodID, args);
2032 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK);
2033 va_end(args);
2034 JNI_END
2035
2036
2037 JNI_ENTRY(void, jni_CallStaticVoidMethodV(JNIEnv *env, jclass cls, jmethodID methodID, va_list args))
2038 JNIWrapper("CallStaticVoidMethodV");
2039 HOTSPOT_JNI_CALLSTATICVOIDMETHODV_ENTRY(env, cls, (uintptr_t) methodID);
2040 DT_VOID_RETURN_MARK(CallStaticVoidMethodV);
2041
2042 JavaValue jvalue(T_VOID);
2043 JNI_ArgumentPusherVaArg ap(methodID, args);
2044 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK);
2045 JNI_END
2046
2047
2048 JNI_ENTRY(void, jni_CallStaticVoidMethodA(JNIEnv *env, jclass cls, jmethodID methodID, const jvalue *args))
2049 JNIWrapper("CallStaticVoidMethodA");
2050 HOTSPOT_JNI_CALLSTATICVOIDMETHODA_ENTRY(env, cls, (uintptr_t) methodID);
2051 DT_VOID_RETURN_MARK(CallStaticVoidMethodA);
2052
2053 JavaValue jvalue(T_VOID);
2054 JNI_ArgumentPusherArray ap(methodID, args);
2055 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK);
2056 JNI_END
2057
2058
2059 //
2060 // Accessing Fields
2061 //
2062
2063
2064 DT_RETURN_MARK_DECL(GetFieldID, jfieldID
2065 , HOTSPOT_JNI_GETFIELDID_RETURN((uintptr_t)_ret_ref));
2066
2067 JNI_ENTRY(jfieldID, jni_GetFieldID(JNIEnv *env, jclass clazz,
2068 const char *name, const char *sig))
2069 JNIWrapper("GetFieldID");
2070 HOTSPOT_JNI_GETFIELDID_ENTRY(env, clazz, (char *) name, (char *) sig);
2071 jfieldID ret = 0;
2072 DT_RETURN_MARK(GetFieldID, jfieldID, (const jfieldID&)ret);
2073
2074 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz));
2075
2076 // The class should have been loaded (we have an instance of the class
2077 // passed in) so the field and signature should already be in the symbol
2078 // table. If they're not there, the field doesn't exist.
2079 TempNewSymbol fieldname = SymbolTable::probe(name, (int)strlen(name));
2080 TempNewSymbol signame = SymbolTable::probe(sig, (int)strlen(sig));
2081 if (fieldname == NULL || signame == NULL) {
2082 ResourceMark rm;
2083 THROW_MSG_0(vmSymbols::java_lang_NoSuchFieldError(), err_msg("%s.%s %s", k->external_name(), name, sig));
2084 }
2085
2086 // Make sure class is initialized before handing id's out to fields
2087 k->initialize(CHECK_NULL);
2088
2089 fieldDescriptor fd;
2090 if (!k->is_instance_klass() ||
2091 !InstanceKlass::cast(k)->find_field(fieldname, signame, false, &fd)) {
2092 ResourceMark rm;
2093 THROW_MSG_0(vmSymbols::java_lang_NoSuchFieldError(), err_msg("%s.%s %s", k->external_name(), name, sig));
2094 }
2095
2096 // A jfieldID for a non-static field is simply the offset of the field within the instanceOop
2097 // It may also have hash bits for k, if VerifyJNIFields is turned on.
2098 ret = jfieldIDWorkaround::to_instance_jfieldID(k, fd.offset(), fd.is_flattened());
2099 return ret;
2100 JNI_END
2101
2102
2103 JNI_ENTRY(jobject, jni_GetObjectField(JNIEnv *env, jobject obj, jfieldID fieldID))
2104 JNIWrapper("GetObjectField");
2105 HOTSPOT_JNI_GETOBJECTFIELD_ENTRY(env, obj, (uintptr_t) fieldID);
2106 oop o = JNIHandles::resolve_non_null(obj);
2107 Klass* k = o->klass();
2108 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID);
2109 oop res = NULL;
2110 // Keep JVMTI addition small and only check enabled flag here.
2111 // jni_GetField_probe() assumes that is okay to create handles.
2112 if (JvmtiExport::should_post_field_access()) {
2113 o = JvmtiExport::jni_GetField_probe(thread, obj, o, k, fieldID, false);
2114 }
2115 if (!jfieldIDWorkaround::is_flattened_field(fieldID)) {
2116 res = HeapAccess<ON_UNKNOWN_OOP_REF>::oop_load_at(o, offset);
2117 } else {
2118 assert(k->is_instance_klass(), "Only instance can have flattened fields");
2119 InstanceKlass* ik = InstanceKlass::cast(k);
2120 fieldDescriptor fd;
2121 ik->find_field_from_offset(offset, false, &fd); // performance bottleneck
2122 InstanceKlass* holder = fd.field_holder();
2123 ValueKlass* field_vklass = ValueKlass::cast(holder->get_value_field_klass(fd.index()));
2124 res = field_vklass->read_flattened_field(o, ik->field_offset(fd.index()), CHECK_NULL);
2125 }
2126 jobject ret = JNIHandles::make_local(env, res);
2127 HOTSPOT_JNI_GETOBJECTFIELD_RETURN(ret);
2128 return ret;
2129 JNI_END
2130
2131
2132
2133 #define DEFINE_GETFIELD(Return,Fieldname,Result \
2134 , EntryProbe, ReturnProbe) \
2135 \
2136 DT_RETURN_MARK_DECL_FOR(Result, Get##Result##Field, Return \
2137 , ReturnProbe); \
2138 \
2139 JNI_ENTRY_NO_PRESERVE(Return, jni_Get##Result##Field(JNIEnv *env, jobject obj, jfieldID fieldID)) \
2140 JNIWrapper("Get" XSTR(Result) "Field"); \
2141 \
2142 EntryProbe; \
2143 Return ret = 0;\
2144 DT_RETURN_MARK_FOR(Result, Get##Result##Field, Return, (const Return&)ret);\
2145 \
2146 oop o = JNIHandles::resolve_non_null(obj); \
2147 Klass* k = o->klass(); \
2148 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID); \
2149 /* Keep JVMTI addition small and only check enabled flag here. */ \
2150 /* jni_GetField_probe_nh() assumes that is not okay to create handles */ \
2151 /* and creates a ResetNoHandleMark. */ \
2152 if (JvmtiExport::should_post_field_access()) { \
2153 o = JvmtiExport::jni_GetField_probe_nh(thread, obj, o, k, fieldID, false); \
2154 } \
2155 ret = o->Fieldname##_field(offset); \
2156 return ret; \
2157 JNI_END
2158
2159 DEFINE_GETFIELD(jboolean, bool, Boolean
2160 , HOTSPOT_JNI_GETBOOLEANFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2161 HOTSPOT_JNI_GETBOOLEANFIELD_RETURN(_ret_ref))
2162 DEFINE_GETFIELD(jbyte, byte, Byte
2163 , HOTSPOT_JNI_GETBYTEFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2164 HOTSPOT_JNI_GETBYTEFIELD_RETURN(_ret_ref))
2165 DEFINE_GETFIELD(jchar, char, Char
2166 , HOTSPOT_JNI_GETCHARFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2167 HOTSPOT_JNI_GETCHARFIELD_RETURN(_ret_ref))
2168 DEFINE_GETFIELD(jshort, short, Short
2169 , HOTSPOT_JNI_GETSHORTFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2170 HOTSPOT_JNI_GETSHORTFIELD_RETURN(_ret_ref))
2171 DEFINE_GETFIELD(jint, int, Int
2172 , HOTSPOT_JNI_GETINTFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2173 HOTSPOT_JNI_GETINTFIELD_RETURN(_ret_ref))
2174 DEFINE_GETFIELD(jlong, long, Long
2175 , HOTSPOT_JNI_GETLONGFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2176 HOTSPOT_JNI_GETLONGFIELD_RETURN(_ret_ref))
2177 // Float and double probes don't return value because dtrace doesn't currently support it
2178 DEFINE_GETFIELD(jfloat, float, Float
2179 , HOTSPOT_JNI_GETFLOATFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2180 HOTSPOT_JNI_GETFLOATFIELD_RETURN())
2181 DEFINE_GETFIELD(jdouble, double, Double
2182 , HOTSPOT_JNI_GETDOUBLEFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2183 HOTSPOT_JNI_GETDOUBLEFIELD_RETURN())
2184
2185 address jni_GetBooleanField_addr() {
2186 return (address)jni_GetBooleanField;
2187 }
2188 address jni_GetByteField_addr() {
2189 return (address)jni_GetByteField;
2190 }
2191 address jni_GetCharField_addr() {
2192 return (address)jni_GetCharField;
2193 }
2194 address jni_GetShortField_addr() {
2195 return (address)jni_GetShortField;
2196 }
2197 address jni_GetIntField_addr() {
2198 return (address)jni_GetIntField;
2199 }
2200 address jni_GetLongField_addr() {
2201 return (address)jni_GetLongField;
2202 }
2203 address jni_GetFloatField_addr() {
2204 return (address)jni_GetFloatField;
2205 }
2206 address jni_GetDoubleField_addr() {
2207 return (address)jni_GetDoubleField;
2208 }
2209
2210 JNI_ENTRY_NO_PRESERVE(void, jni_SetObjectField(JNIEnv *env, jobject obj, jfieldID fieldID, jobject value))
2211 JNIWrapper("SetObjectField");
2212 HOTSPOT_JNI_SETOBJECTFIELD_ENTRY(env, obj, (uintptr_t) fieldID, value);
2213 oop o = JNIHandles::resolve_non_null(obj);
2214 Klass* k = o->klass();
2215 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID);
2216 // Keep JVMTI addition small and only check enabled flag here.
2217 // jni_SetField_probe_nh() assumes that is not okay to create handles
2218 // and creates a ResetNoHandleMark.
2219 if (JvmtiExport::should_post_field_modification()) {
2220 jvalue field_value;
2221 field_value.l = value;
2222 o = JvmtiExport::jni_SetField_probe_nh(thread, obj, o, k, fieldID, false, JVM_SIGNATURE_CLASS, (jvalue *)&field_value);
2223 }
2224 if (!jfieldIDWorkaround::is_flattened_field(fieldID)) {
2225 HeapAccess<ON_UNKNOWN_OOP_REF>::oop_store_at(o, offset, JNIHandles::resolve(value));
2226 } else {
2227 assert(k->is_instance_klass(), "Only instances can have flattened fields");
2228 InstanceKlass* ik = InstanceKlass::cast(k);
2229 fieldDescriptor fd;
2230 ik->find_field_from_offset(offset, false, &fd);
2231 InstanceKlass* holder = fd.field_holder();
2232 ValueKlass* vklass = ValueKlass::cast(holder->get_value_field_klass(fd.index()));
2233 oop v = JNIHandles::resolve_non_null(value);
2234 vklass->write_flattened_field(o, offset, v, CHECK);
2235 }
2236 HOTSPOT_JNI_SETOBJECTFIELD_RETURN();
2237 JNI_END
2238
2239
2240 #define DEFINE_SETFIELD(Argument,Fieldname,Result,SigType,unionType \
2241 , EntryProbe, ReturnProbe) \
2242 \
2243 JNI_ENTRY_NO_PRESERVE(void, jni_Set##Result##Field(JNIEnv *env, jobject obj, jfieldID fieldID, Argument value)) \
2244 JNIWrapper("Set" XSTR(Result) "Field"); \
2245 \
2246 EntryProbe; \
2247 \
2248 oop o = JNIHandles::resolve_non_null(obj); \
2249 Klass* k = o->klass(); \
2250 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID); \
2251 /* Keep JVMTI addition small and only check enabled flag here. */ \
2252 /* jni_SetField_probe_nh() assumes that is not okay to create handles */ \
2253 /* and creates a ResetNoHandleMark. */ \
2254 if (JvmtiExport::should_post_field_modification()) { \
2255 jvalue field_value; \
2256 field_value.unionType = value; \
2257 o = JvmtiExport::jni_SetField_probe_nh(thread, obj, o, k, fieldID, false, SigType, (jvalue *)&field_value); \
2258 } \
2259 if (SigType == JVM_SIGNATURE_BOOLEAN) { value = ((jboolean)value) & 1; } \
2260 o->Fieldname##_field_put(offset, value); \
2261 ReturnProbe; \
2262 JNI_END
2263
2264 DEFINE_SETFIELD(jboolean, bool, Boolean, JVM_SIGNATURE_BOOLEAN, z
2265 , HOTSPOT_JNI_SETBOOLEANFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value),
2266 HOTSPOT_JNI_SETBOOLEANFIELD_RETURN())
2267 DEFINE_SETFIELD(jbyte, byte, Byte, JVM_SIGNATURE_BYTE, b
2268 , HOTSPOT_JNI_SETBYTEFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value),
2269 HOTSPOT_JNI_SETBYTEFIELD_RETURN())
2270 DEFINE_SETFIELD(jchar, char, Char, JVM_SIGNATURE_CHAR, c
2271 , HOTSPOT_JNI_SETCHARFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value),
2272 HOTSPOT_JNI_SETCHARFIELD_RETURN())
2273 DEFINE_SETFIELD(jshort, short, Short, JVM_SIGNATURE_SHORT, s
2274 , HOTSPOT_JNI_SETSHORTFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value),
2275 HOTSPOT_JNI_SETSHORTFIELD_RETURN())
2276 DEFINE_SETFIELD(jint, int, Int, JVM_SIGNATURE_INT, i
2277 , HOTSPOT_JNI_SETINTFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value),
2278 HOTSPOT_JNI_SETINTFIELD_RETURN())
2279 DEFINE_SETFIELD(jlong, long, Long, JVM_SIGNATURE_LONG, j
2280 , HOTSPOT_JNI_SETLONGFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value),
2281 HOTSPOT_JNI_SETLONGFIELD_RETURN())
2282 // Float and double probes don't return value because dtrace doesn't currently support it
2283 DEFINE_SETFIELD(jfloat, float, Float, JVM_SIGNATURE_FLOAT, f
2284 , HOTSPOT_JNI_SETFLOATFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2285 HOTSPOT_JNI_SETFLOATFIELD_RETURN())
2286 DEFINE_SETFIELD(jdouble, double, Double, JVM_SIGNATURE_DOUBLE, d
2287 , HOTSPOT_JNI_SETDOUBLEFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2288 HOTSPOT_JNI_SETDOUBLEFIELD_RETURN())
2289
2290 DT_RETURN_MARK_DECL(ToReflectedField, jobject
2291 , HOTSPOT_JNI_TOREFLECTEDFIELD_RETURN(_ret_ref));
2292
2293 JNI_ENTRY(jobject, jni_ToReflectedField(JNIEnv *env, jclass cls, jfieldID fieldID, jboolean isStatic))
2294 JNIWrapper("ToReflectedField");
2295 HOTSPOT_JNI_TOREFLECTEDFIELD_ENTRY(env, cls, (uintptr_t) fieldID, isStatic);
2296 jobject ret = NULL;
2297 DT_RETURN_MARK(ToReflectedField, jobject, (const jobject&)ret);
2298
2299 fieldDescriptor fd;
2300 bool found = false;
2301 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2302
2303 assert(jfieldIDWorkaround::is_static_jfieldID(fieldID) == (isStatic != 0), "invalid fieldID");
2304
2305 if (isStatic) {
2306 // Static field. The fieldID a JNIid specifying the field holder and the offset within the Klass*.
2307 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID);
2308 assert(id->is_static_field_id(), "invalid static field id");
2309 found = id->find_local_field(&fd);
2310 } else {
2311 // Non-static field. The fieldID is really the offset of the field within the instanceOop.
2312 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID);
2313 found = InstanceKlass::cast(k)->find_field_from_offset(offset, false, &fd);
2314 }
2315 assert(found, "bad fieldID passed into jni_ToReflectedField");
2316 oop reflected = Reflection::new_field(&fd, CHECK_NULL);
2317 ret = JNIHandles::make_local(env, reflected);
2318 return ret;
2319 JNI_END
2320
2321
2322 //
2323 // Accessing Static Fields
2324 //
2325 DT_RETURN_MARK_DECL(GetStaticFieldID, jfieldID
2326 , HOTSPOT_JNI_GETSTATICFIELDID_RETURN((uintptr_t)_ret_ref));
2327
2328 JNI_ENTRY(jfieldID, jni_GetStaticFieldID(JNIEnv *env, jclass clazz,
2329 const char *name, const char *sig))
2330 JNIWrapper("GetStaticFieldID");
2331 HOTSPOT_JNI_GETSTATICFIELDID_ENTRY(env, clazz, (char *) name, (char *) sig);
2332 jfieldID ret = NULL;
2333 DT_RETURN_MARK(GetStaticFieldID, jfieldID, (const jfieldID&)ret);
2334
2335 // The class should have been loaded (we have an instance of the class
2336 // passed in) so the field and signature should already be in the symbol
2337 // table. If they're not there, the field doesn't exist.
2338 TempNewSymbol fieldname = SymbolTable::probe(name, (int)strlen(name));
2339 TempNewSymbol signame = SymbolTable::probe(sig, (int)strlen(sig));
2340 if (fieldname == NULL || signame == NULL) {
2341 THROW_MSG_0(vmSymbols::java_lang_NoSuchFieldError(), (char*) name);
2342 }
2343 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz));
2344 // Make sure class is initialized before handing id's out to static fields
2345 k->initialize(CHECK_NULL);
2346
2347 fieldDescriptor fd;
2348 if (!k->is_instance_klass() ||
2349 !InstanceKlass::cast(k)->find_field(fieldname, signame, true, &fd)) {
2350 THROW_MSG_0(vmSymbols::java_lang_NoSuchFieldError(), (char*) name);
2351 }
2352
2353 // A jfieldID for a static field is a JNIid specifying the field holder and the offset within the Klass*
2354 JNIid* id = fd.field_holder()->jni_id_for(fd.offset());
2355 debug_only(id->set_is_static_field_id();)
2356
2357 debug_only(id->verify(fd.field_holder()));
2358
2359 ret = jfieldIDWorkaround::to_static_jfieldID(id);
2360 return ret;
2361 JNI_END
2362
2363
2364 JNI_ENTRY(jobject, jni_GetStaticObjectField(JNIEnv *env, jclass clazz, jfieldID fieldID))
2365 JNIWrapper("GetStaticObjectField");
2366 HOTSPOT_JNI_GETSTATICOBJECTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID);
2367 #if INCLUDE_JNI_CHECK
2368 DEBUG_ONLY(Klass* param_k = jniCheck::validate_class(thread, clazz);)
2369 #endif // INCLUDE_JNI_CHECK
2370 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID);
2371 assert(id->is_static_field_id(), "invalid static field id");
2372 // Keep JVMTI addition small and only check enabled flag here.
2373 // jni_GetField_probe() assumes that is okay to create handles.
2374 if (JvmtiExport::should_post_field_access()) {
2375 JvmtiExport::jni_GetField_probe(thread, NULL, NULL, id->holder(), fieldID, true);
2376 }
2377 jobject ret = JNIHandles::make_local(id->holder()->java_mirror()->obj_field(id->offset()));
2378 HOTSPOT_JNI_GETSTATICOBJECTFIELD_RETURN(ret);
2379 return ret;
2380 JNI_END
2381
2382
2383 #define DEFINE_GETSTATICFIELD(Return,Fieldname,Result \
2384 , EntryProbe, ReturnProbe) \
2385 \
2386 DT_RETURN_MARK_DECL_FOR(Result, GetStatic##Result##Field, Return \
2387 , ReturnProbe); \
2388 \
2389 JNI_ENTRY(Return, jni_GetStatic##Result##Field(JNIEnv *env, jclass clazz, jfieldID fieldID)) \
2390 JNIWrapper("GetStatic" XSTR(Result) "Field"); \
2391 EntryProbe; \
2392 Return ret = 0;\
2393 DT_RETURN_MARK_FOR(Result, GetStatic##Result##Field, Return, \
2394 (const Return&)ret);\
2395 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID); \
2396 assert(id->is_static_field_id(), "invalid static field id"); \
2397 /* Keep JVMTI addition small and only check enabled flag here. */ \
2398 /* jni_GetField_probe() assumes that is okay to create handles. */ \
2399 if (JvmtiExport::should_post_field_access()) { \
2400 JvmtiExport::jni_GetField_probe(thread, NULL, NULL, id->holder(), fieldID, true); \
2401 } \
2402 ret = id->holder()->java_mirror()-> Fieldname##_field (id->offset()); \
2403 return ret;\
2404 JNI_END
2405
2406 DEFINE_GETSTATICFIELD(jboolean, bool, Boolean
2407 , HOTSPOT_JNI_GETSTATICBOOLEANFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICBOOLEANFIELD_RETURN(_ret_ref))
2408 DEFINE_GETSTATICFIELD(jbyte, byte, Byte
2409 , HOTSPOT_JNI_GETSTATICBYTEFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICBYTEFIELD_RETURN(_ret_ref) )
2410 DEFINE_GETSTATICFIELD(jchar, char, Char
2411 , HOTSPOT_JNI_GETSTATICCHARFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICCHARFIELD_RETURN(_ret_ref) )
2412 DEFINE_GETSTATICFIELD(jshort, short, Short
2413 , HOTSPOT_JNI_GETSTATICSHORTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICSHORTFIELD_RETURN(_ret_ref) )
2414 DEFINE_GETSTATICFIELD(jint, int, Int
2415 , HOTSPOT_JNI_GETSTATICINTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICINTFIELD_RETURN(_ret_ref) )
2416 DEFINE_GETSTATICFIELD(jlong, long, Long
2417 , HOTSPOT_JNI_GETSTATICLONGFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICLONGFIELD_RETURN(_ret_ref) )
2418 // Float and double probes don't return value because dtrace doesn't currently support it
2419 DEFINE_GETSTATICFIELD(jfloat, float, Float
2420 , HOTSPOT_JNI_GETSTATICFLOATFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICFLOATFIELD_RETURN() )
2421 DEFINE_GETSTATICFIELD(jdouble, double, Double
2422 , HOTSPOT_JNI_GETSTATICDOUBLEFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICDOUBLEFIELD_RETURN() )
2423
2424 JNI_ENTRY(void, jni_SetStaticObjectField(JNIEnv *env, jclass clazz, jfieldID fieldID, jobject value))
2425 JNIWrapper("SetStaticObjectField");
2426 HOTSPOT_JNI_SETSTATICOBJECTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value);
2427 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID);
2428 assert(id->is_static_field_id(), "invalid static field id");
2429 // Keep JVMTI addition small and only check enabled flag here.
2430 // jni_SetField_probe() assumes that is okay to create handles.
2431 if (JvmtiExport::should_post_field_modification()) {
2432 jvalue field_value;
2433 field_value.l = value;
2434 JvmtiExport::jni_SetField_probe(thread, NULL, NULL, id->holder(), fieldID, true, JVM_SIGNATURE_CLASS, (jvalue *)&field_value);
2435 }
2436 id->holder()->java_mirror()->obj_field_put(id->offset(), JNIHandles::resolve(value));
2437 HOTSPOT_JNI_SETSTATICOBJECTFIELD_RETURN();
2438 JNI_END
2439
2440
2441
2442 #define DEFINE_SETSTATICFIELD(Argument,Fieldname,Result,SigType,unionType \
2443 , EntryProbe, ReturnProbe) \
2444 \
2445 JNI_ENTRY(void, jni_SetStatic##Result##Field(JNIEnv *env, jclass clazz, jfieldID fieldID, Argument value)) \
2446 JNIWrapper("SetStatic" XSTR(Result) "Field"); \
2447 EntryProbe; \
2448 \
2449 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID); \
2450 assert(id->is_static_field_id(), "invalid static field id"); \
2451 /* Keep JVMTI addition small and only check enabled flag here. */ \
2452 /* jni_SetField_probe() assumes that is okay to create handles. */ \
2453 if (JvmtiExport::should_post_field_modification()) { \
2454 jvalue field_value; \
2455 field_value.unionType = value; \
2456 JvmtiExport::jni_SetField_probe(thread, NULL, NULL, id->holder(), fieldID, true, SigType, (jvalue *)&field_value); \
2457 } \
2458 if (SigType == JVM_SIGNATURE_BOOLEAN) { value = ((jboolean)value) & 1; } \
2459 id->holder()->java_mirror()-> Fieldname##_field_put (id->offset(), value); \
2460 ReturnProbe;\
2461 JNI_END
2462
2463 DEFINE_SETSTATICFIELD(jboolean, bool, Boolean, JVM_SIGNATURE_BOOLEAN, z
2464 , HOTSPOT_JNI_SETSTATICBOOLEANFIELD_ENTRY(env, clazz, (uintptr_t)fieldID, value),
2465 HOTSPOT_JNI_SETSTATICBOOLEANFIELD_RETURN())
2466 DEFINE_SETSTATICFIELD(jbyte, byte, Byte, JVM_SIGNATURE_BYTE, b
2467 , HOTSPOT_JNI_SETSTATICBYTEFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value),
2468 HOTSPOT_JNI_SETSTATICBYTEFIELD_RETURN())
2469 DEFINE_SETSTATICFIELD(jchar, char, Char, JVM_SIGNATURE_CHAR, c
2470 , HOTSPOT_JNI_SETSTATICCHARFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value),
2471 HOTSPOT_JNI_SETSTATICCHARFIELD_RETURN())
2472 DEFINE_SETSTATICFIELD(jshort, short, Short, JVM_SIGNATURE_SHORT, s
2473 , HOTSPOT_JNI_SETSTATICSHORTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value),
2474 HOTSPOT_JNI_SETSTATICSHORTFIELD_RETURN())
2475 DEFINE_SETSTATICFIELD(jint, int, Int, JVM_SIGNATURE_INT, i
2476 , HOTSPOT_JNI_SETSTATICINTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value),
2477 HOTSPOT_JNI_SETSTATICINTFIELD_RETURN())
2478 DEFINE_SETSTATICFIELD(jlong, long, Long, JVM_SIGNATURE_LONG, j
2479 , HOTSPOT_JNI_SETSTATICLONGFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value),
2480 HOTSPOT_JNI_SETSTATICLONGFIELD_RETURN())
2481 // Float and double probes don't return value because dtrace doesn't currently support it
2482 DEFINE_SETSTATICFIELD(jfloat, float, Float, JVM_SIGNATURE_FLOAT, f
2483 , HOTSPOT_JNI_SETSTATICFLOATFIELD_ENTRY(env, clazz, (uintptr_t) fieldID),
2484 HOTSPOT_JNI_SETSTATICFLOATFIELD_RETURN())
2485 DEFINE_SETSTATICFIELD(jdouble, double, Double, JVM_SIGNATURE_DOUBLE, d
2486 , HOTSPOT_JNI_SETSTATICDOUBLEFIELD_ENTRY(env, clazz, (uintptr_t) fieldID),
2487 HOTSPOT_JNI_SETSTATICDOUBLEFIELD_RETURN())
2488
2489 //
2490 // String Operations
2491 //
2492
2493 // Unicode Interface
2494
2495 DT_RETURN_MARK_DECL(NewString, jstring
2496 , HOTSPOT_JNI_NEWSTRING_RETURN(_ret_ref));
2497
2498 JNI_ENTRY(jstring, jni_NewString(JNIEnv *env, const jchar *unicodeChars, jsize len))
2499 JNIWrapper("NewString");
2500 HOTSPOT_JNI_NEWSTRING_ENTRY(env, (uint16_t *) unicodeChars, len);
2501 jstring ret = NULL;
2502 DT_RETURN_MARK(NewString, jstring, (const jstring&)ret);
2503 oop string=java_lang_String::create_oop_from_unicode((jchar*) unicodeChars, len, CHECK_NULL);
2504 ret = (jstring) JNIHandles::make_local(env, string);
2505 return ret;
2506 JNI_END
2507
2508
2509 JNI_ENTRY_NO_PRESERVE(jsize, jni_GetStringLength(JNIEnv *env, jstring string))
2510 JNIWrapper("GetStringLength");
2511 HOTSPOT_JNI_GETSTRINGLENGTH_ENTRY(env, string);
2512 jsize ret = 0;
2513 oop s = JNIHandles::resolve_non_null(string);
2514 ret = java_lang_String::length(s);
2515 HOTSPOT_JNI_GETSTRINGLENGTH_RETURN(ret);
2516 return ret;
2517 JNI_END
2518
2519
2520 JNI_ENTRY_NO_PRESERVE(const jchar*, jni_GetStringChars(
2521 JNIEnv *env, jstring string, jboolean *isCopy))
2522 JNIWrapper("GetStringChars");
2523 HOTSPOT_JNI_GETSTRINGCHARS_ENTRY(env, string, (uintptr_t *) isCopy);
2524 jchar* buf = NULL;
2525 oop s = JNIHandles::resolve_non_null(string);
2526 typeArrayOop s_value = java_lang_String::value(s);
2527 if (s_value != NULL) {
2528 int s_len = java_lang_String::length(s, s_value);
2529 bool is_latin1 = java_lang_String::is_latin1(s);
2530 buf = NEW_C_HEAP_ARRAY_RETURN_NULL(jchar, s_len + 1, mtInternal); // add one for zero termination
2531 /* JNI Specification states return NULL on OOM */
2532 if (buf != NULL) {
2533 if (s_len > 0) {
2534 if (!is_latin1) {
2535 ArrayAccess<>::arraycopy_to_native(s_value, (size_t) typeArrayOopDesc::element_offset<jchar>(0),
2536 buf, s_len);
2537 } else {
2538 for (int i = 0; i < s_len; i++) {
2539 buf[i] = ((jchar) s_value->byte_at(i)) & 0xff;
2540 }
2541 }
2542 }
2543 buf[s_len] = 0;
2544 //%note jni_5
2545 if (isCopy != NULL) {
2546 *isCopy = JNI_TRUE;
2547 }
2548 }
2549 }
2550 HOTSPOT_JNI_GETSTRINGCHARS_RETURN(buf);
2551 return buf;
2552 JNI_END
2553
2554
2555 JNI_ENTRY_NO_PRESERVE(void, jni_ReleaseStringChars(JNIEnv *env, jstring str, const jchar *chars))
2556 JNIWrapper("ReleaseStringChars");
2557 HOTSPOT_JNI_RELEASESTRINGCHARS_ENTRY(env, str, (uint16_t *) chars);
2558 //%note jni_6
2559 if (chars != NULL) {
2560 // Since String objects are supposed to be immutable, don't copy any
2561 // new data back. A bad user will have to go after the char array.
2562 FreeHeap((void*) chars);
2563 }
2564 HOTSPOT_JNI_RELEASESTRINGCHARS_RETURN();
2565 JNI_END
2566
2567
2568 // UTF Interface
2569
2570 DT_RETURN_MARK_DECL(NewStringUTF, jstring
2571 , HOTSPOT_JNI_NEWSTRINGUTF_RETURN(_ret_ref));
2572
2573 JNI_ENTRY(jstring, jni_NewStringUTF(JNIEnv *env, const char *bytes))
2574 JNIWrapper("NewStringUTF");
2575 HOTSPOT_JNI_NEWSTRINGUTF_ENTRY(env, (char *) bytes);
2576 jstring ret;
2577 DT_RETURN_MARK(NewStringUTF, jstring, (const jstring&)ret);
2578
2579 oop result = java_lang_String::create_oop_from_str((char*) bytes, CHECK_NULL);
2580 ret = (jstring) JNIHandles::make_local(env, result);
2581 return ret;
2582 JNI_END
2583
2584
2585 JNI_ENTRY(jsize, jni_GetStringUTFLength(JNIEnv *env, jstring string))
2586 JNIWrapper("GetStringUTFLength");
2587 HOTSPOT_JNI_GETSTRINGUTFLENGTH_ENTRY(env, string);
2588 oop java_string = JNIHandles::resolve_non_null(string);
2589 jsize ret = java_lang_String::utf8_length(java_string);
2590 HOTSPOT_JNI_GETSTRINGUTFLENGTH_RETURN(ret);
2591 return ret;
2592 JNI_END
2593
2594
2595 JNI_ENTRY(const char*, jni_GetStringUTFChars(JNIEnv *env, jstring string, jboolean *isCopy))
2596 JNIWrapper("GetStringUTFChars");
2597 HOTSPOT_JNI_GETSTRINGUTFCHARS_ENTRY(env, string, (uintptr_t *) isCopy);
2598 char* result = NULL;
2599 oop java_string = JNIHandles::resolve_non_null(string);
2600 typeArrayOop s_value = java_lang_String::value(java_string);
2601 if (s_value != NULL) {
2602 size_t length = java_lang_String::utf8_length(java_string, s_value);
2603 /* JNI Specification states return NULL on OOM */
2604 result = AllocateHeap(length + 1, mtInternal, 0, AllocFailStrategy::RETURN_NULL);
2605 if (result != NULL) {
2606 java_lang_String::as_utf8_string(java_string, s_value, result, (int) length + 1);
2607 if (isCopy != NULL) {
2608 *isCopy = JNI_TRUE;
2609 }
2610 }
2611 }
2612 HOTSPOT_JNI_GETSTRINGUTFCHARS_RETURN(result);
2613 return result;
2614 JNI_END
2615
2616
2617 JNI_LEAF(void, jni_ReleaseStringUTFChars(JNIEnv *env, jstring str, const char *chars))
2618 JNIWrapper("ReleaseStringUTFChars");
2619 HOTSPOT_JNI_RELEASESTRINGUTFCHARS_ENTRY(env, str, (char *) chars);
2620 if (chars != NULL) {
2621 FreeHeap((char*) chars);
2622 }
2623 HOTSPOT_JNI_RELEASESTRINGUTFCHARS_RETURN();
2624 JNI_END
2625
2626
2627 JNI_ENTRY_NO_PRESERVE(jsize, jni_GetArrayLength(JNIEnv *env, jarray array))
2628 JNIWrapper("GetArrayLength");
2629 HOTSPOT_JNI_GETARRAYLENGTH_ENTRY(env, array);
2630 arrayOop a = arrayOop(JNIHandles::resolve_non_null(array));
2631 assert(a->is_array(), "must be array");
2632 jsize ret = a->length();
2633 HOTSPOT_JNI_GETARRAYLENGTH_RETURN(ret);
2634 return ret;
2635 JNI_END
2636
2637
2638 //
2639 // Object Array Operations
2640 //
2641
2642 DT_RETURN_MARK_DECL(NewObjectArray, jobjectArray
2643 , HOTSPOT_JNI_NEWOBJECTARRAY_RETURN(_ret_ref));
2644
2645 JNI_ENTRY(jobjectArray, jni_NewObjectArray(JNIEnv *env, jsize length, jclass elementClass, jobject initialElement))
2646 JNIWrapper("NewObjectArray");
2647 HOTSPOT_JNI_NEWOBJECTARRAY_ENTRY(env, length, elementClass, initialElement);
2648 jobjectArray ret = NULL;
2649 DT_RETURN_MARK(NewObjectArray, jobjectArray, (const jobjectArray&)ret);
2650 Klass* ek = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(elementClass));
2651 Klass* ak = ek->array_klass(CHECK_NULL);
2652 ObjArrayKlass::cast(ak)->initialize(CHECK_NULL);
2653 objArrayOop result = ObjArrayKlass::cast(ak)->allocate(length, CHECK_NULL);
2654 oop initial_value = JNIHandles::resolve(initialElement);
2655 if (initial_value != NULL) { // array already initialized with NULL
2656 for (int index = 0; index < length; index++) {
2657 result->obj_at_put(index, initial_value);
2658 }
2659 }
2660 ret = (jobjectArray) JNIHandles::make_local(env, result);
2661 return ret;
2662 JNI_END
2663
2664 DT_RETURN_MARK_DECL(GetObjectArrayElement, jobject
2665 , HOTSPOT_JNI_GETOBJECTARRAYELEMENT_RETURN(_ret_ref));
2666
2667 JNI_ENTRY(jobject, jni_GetObjectArrayElement(JNIEnv *env, jobjectArray array, jsize index))
2668 JNIWrapper("GetObjectArrayElement");
2669 HOTSPOT_JNI_GETOBJECTARRAYELEMENT_ENTRY(env, array, index);
2670 jobject ret = NULL;
2671 DT_RETURN_MARK(GetObjectArrayElement, jobject, (const jobject&)ret);
2672 oop res = NULL;
2673 arrayOop arr((arrayOop)JNIHandles::resolve_non_null(array));
2674 if (arr->is_within_bounds(index)) {
2675 if (arr->is_valueArray()) {
2676 valueArrayOop a = valueArrayOop(JNIHandles::resolve_non_null(array));
2677 arrayHandle ah(THREAD, a);
2678 valueArrayHandle vah(thread, a);
2679 res = valueArrayOopDesc::value_alloc_copy_from_index(vah, index, CHECK_NULL);
2680 assert(res != NULL, "Must be set in one of two paths above");
2681 } else {
2682 assert(arr->is_objArray(), "If not a valueArray. must be an objArray");
2683 objArrayOop a = objArrayOop(JNIHandles::resolve_non_null(array));
2684 res = a->obj_at(index);
2685 }
2686 } else {
2687 ResourceMark rm(THREAD);
2688 stringStream ss;
2689 ss.print("Index %d out of bounds for length %d", index,arr->length());
2690 THROW_MSG_0(vmSymbols::java_lang_ArrayIndexOutOfBoundsException(), ss.as_string());
2691 }
2692 ret = JNIHandles::make_local(env, res);
2693 return ret;
2694 JNI_END
2695
2696 DT_VOID_RETURN_MARK_DECL(SetObjectArrayElement
2697 , HOTSPOT_JNI_SETOBJECTARRAYELEMENT_RETURN());
2698
2699 JNI_ENTRY(void, jni_SetObjectArrayElement(JNIEnv *env, jobjectArray array, jsize index, jobject value))
2700 JNIWrapper("SetObjectArrayElement");
2701 HOTSPOT_JNI_SETOBJECTARRAYELEMENT_ENTRY(env, array, index, value);
2702 DT_VOID_RETURN_MARK(SetObjectArrayElement);
2703
2704 bool oob = false;
2705 int length = -1;
2706 oop res = NULL;
2707 arrayOop arr((arrayOop)JNIHandles::resolve_non_null(array));
2708 if (arr->is_within_bounds(index)) {
2709 if (arr->is_valueArray()) {
2710 valueArrayOop a = valueArrayOop(JNIHandles::resolve_non_null(array));
2711 oop v = JNIHandles::resolve(value);
2712 ValueArrayKlass* vaklass = ValueArrayKlass::cast(a->klass());
2713 ValueKlass* element_vklass = vaklass->element_klass();
2714 if (v != NULL && v->is_a(element_vklass)) {
2715 a->value_copy_to_index(v, index);
2716 } else {
2717 ResourceMark rm(THREAD);
2718 stringStream ss;
2719 Klass *kl = ValueArrayKlass::cast(a->klass());
2720 ss.print("type mismatch: can not store %s to %s[%d]",
2721 v->klass()->external_name(),
2722 kl->external_name(),
2723 index);
2724 for (int dims = ArrayKlass::cast(a->klass())->dimension(); dims > 1; --dims) {
2725 ss.print("[]");
2726 }
2727 THROW_MSG(vmSymbols::java_lang_ArrayStoreException(), ss.as_string());
2728 }
2729 } else {
2730 assert(arr->is_objArray(), "If not a valueArray. must be an objArray");
2731 objArrayOop a = objArrayOop(JNIHandles::resolve_non_null(array));
2732 oop v = JNIHandles::resolve(value);
2733 if (v == NULL || v->is_a(ObjArrayKlass::cast(a->klass())->element_klass())) {
2734 a->obj_at_put(index, v);
2735 } else {
2736 ResourceMark rm(THREAD);
2737 stringStream ss;
2738 Klass *bottom_kl = ObjArrayKlass::cast(a->klass())->bottom_klass();
2739 ss.print("type mismatch: can not store %s to %s[%d]",
2740 v->klass()->external_name(),
2741 bottom_kl->is_typeArray_klass() ? type2name_tab[ArrayKlass::cast(bottom_kl)->element_type()] : bottom_kl->external_name(),
2742 index);
2743 for (int dims = ArrayKlass::cast(a->klass())->dimension(); dims > 1; --dims) {
2744 ss.print("[]");
2745 }
2746 THROW_MSG(vmSymbols::java_lang_ArrayStoreException(), ss.as_string());
2747 }
2748 }
2749 } else {
2750 ResourceMark rm(THREAD);
2751 stringStream ss;
2752 ss.print("Index %d out of bounds for length %d", index, arr->length());
2753 THROW_MSG(vmSymbols::java_lang_ArrayIndexOutOfBoundsException(), ss.as_string());
2754 }
2755 JNI_END
2756
2757
2758
2759 #define DEFINE_NEWSCALARARRAY(Return,Allocator,Result \
2760 ,EntryProbe,ReturnProbe) \
2761 \
2762 DT_RETURN_MARK_DECL(New##Result##Array, Return \
2763 , ReturnProbe); \
2764 \
2765 JNI_ENTRY(Return, \
2766 jni_New##Result##Array(JNIEnv *env, jsize len)) \
2767 JNIWrapper("New" XSTR(Result) "Array"); \
2768 EntryProbe; \
2769 Return ret = NULL;\
2770 DT_RETURN_MARK(New##Result##Array, Return, (const Return&)ret);\
2771 \
2772 oop obj= oopFactory::Allocator(len, CHECK_0); \
2773 ret = (Return) JNIHandles::make_local(env, obj); \
2774 return ret;\
2775 JNI_END
2776
2777 DEFINE_NEWSCALARARRAY(jbooleanArray, new_boolArray, Boolean,
2778 HOTSPOT_JNI_NEWBOOLEANARRAY_ENTRY(env, len),
2779 HOTSPOT_JNI_NEWBOOLEANARRAY_RETURN(_ret_ref))
2780 DEFINE_NEWSCALARARRAY(jbyteArray, new_byteArray, Byte,
2781 HOTSPOT_JNI_NEWBYTEARRAY_ENTRY(env, len),
2782 HOTSPOT_JNI_NEWBYTEARRAY_RETURN(_ret_ref))
2783 DEFINE_NEWSCALARARRAY(jshortArray, new_shortArray, Short,
2784 HOTSPOT_JNI_NEWSHORTARRAY_ENTRY(env, len),
2785 HOTSPOT_JNI_NEWSHORTARRAY_RETURN(_ret_ref))
2786 DEFINE_NEWSCALARARRAY(jcharArray, new_charArray, Char,
2787 HOTSPOT_JNI_NEWCHARARRAY_ENTRY(env, len),
2788 HOTSPOT_JNI_NEWCHARARRAY_RETURN(_ret_ref))
2789 DEFINE_NEWSCALARARRAY(jintArray, new_intArray, Int,
2790 HOTSPOT_JNI_NEWINTARRAY_ENTRY(env, len),
2791 HOTSPOT_JNI_NEWINTARRAY_RETURN(_ret_ref))
2792 DEFINE_NEWSCALARARRAY(jlongArray, new_longArray, Long,
2793 HOTSPOT_JNI_NEWLONGARRAY_ENTRY(env, len),
2794 HOTSPOT_JNI_NEWLONGARRAY_RETURN(_ret_ref))
2795 DEFINE_NEWSCALARARRAY(jfloatArray, new_floatArray, Float,
2796 HOTSPOT_JNI_NEWFLOATARRAY_ENTRY(env, len),
2797 HOTSPOT_JNI_NEWFLOATARRAY_RETURN(_ret_ref))
2798 DEFINE_NEWSCALARARRAY(jdoubleArray, new_doubleArray, Double,
2799 HOTSPOT_JNI_NEWDOUBLEARRAY_ENTRY(env, len),
2800 HOTSPOT_JNI_NEWDOUBLEARRAY_RETURN(_ret_ref))
2801
2802 // Return an address which will fault if the caller writes to it.
2803
2804 static char* get_bad_address() {
2805 static char* bad_address = NULL;
2806 if (bad_address == NULL) {
2807 size_t size = os::vm_allocation_granularity();
2808 bad_address = os::reserve_memory(size);
2809 if (bad_address != NULL) {
2810 os::protect_memory(bad_address, size, os::MEM_PROT_READ,
2811 /*is_committed*/false);
2812 MemTracker::record_virtual_memory_type((void*)bad_address, mtInternal);
2813 }
2814 }
2815 return bad_address;
2816 }
2817
2818
2819
2820 #define DEFINE_GETSCALARARRAYELEMENTS(ElementTag,ElementType,Result, Tag \
2821 , EntryProbe, ReturnProbe) \
2822 \
2823 JNI_ENTRY_NO_PRESERVE(ElementType*, \
2824 jni_Get##Result##ArrayElements(JNIEnv *env, ElementType##Array array, jboolean *isCopy)) \
2825 JNIWrapper("Get" XSTR(Result) "ArrayElements"); \
2826 EntryProbe; \
2827 /* allocate an chunk of memory in c land */ \
2828 typeArrayOop a = typeArrayOop(JNIHandles::resolve_non_null(array)); \
2829 ElementType* result; \
2830 int len = a->length(); \
2831 if (len == 0) { \
2832 if (isCopy != NULL) { \
2833 *isCopy = JNI_FALSE; \
2834 } \
2835 /* Empty array: legal but useless, can't return NULL. \
2836 * Return a pointer to something useless. \
2837 * Avoid asserts in typeArrayOop. */ \
2838 result = (ElementType*)get_bad_address(); \
2839 } else { \
2840 /* JNI Specification states return NULL on OOM */ \
2841 result = NEW_C_HEAP_ARRAY_RETURN_NULL(ElementType, len, mtInternal); \
2842 if (result != NULL) { \
2843 /* copy the array to the c chunk */ \
2844 ArrayAccess<>::arraycopy_to_native(a, typeArrayOopDesc::element_offset<ElementType>(0), \
2845 result, len); \
2846 if (isCopy) { \
2847 *isCopy = JNI_TRUE; \
2848 } \
2849 } \
2850 } \
2851 ReturnProbe; \
2852 return result; \
2853 JNI_END
2854
2855 DEFINE_GETSCALARARRAYELEMENTS(T_BOOLEAN, jboolean, Boolean, bool
2856 , HOTSPOT_JNI_GETBOOLEANARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy),
2857 HOTSPOT_JNI_GETBOOLEANARRAYELEMENTS_RETURN((uintptr_t*)result))
2858 DEFINE_GETSCALARARRAYELEMENTS(T_BYTE, jbyte, Byte, byte
2859 , HOTSPOT_JNI_GETBYTEARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy),
2860 HOTSPOT_JNI_GETBYTEARRAYELEMENTS_RETURN((char*)result))
2861 DEFINE_GETSCALARARRAYELEMENTS(T_SHORT, jshort, Short, short
2862 , HOTSPOT_JNI_GETSHORTARRAYELEMENTS_ENTRY(env, (uint16_t*) array, (uintptr_t *) isCopy),
2863 HOTSPOT_JNI_GETSHORTARRAYELEMENTS_RETURN((uint16_t*)result))
2864 DEFINE_GETSCALARARRAYELEMENTS(T_CHAR, jchar, Char, char
2865 , HOTSPOT_JNI_GETCHARARRAYELEMENTS_ENTRY(env, (uint16_t*) array, (uintptr_t *) isCopy),
2866 HOTSPOT_JNI_GETCHARARRAYELEMENTS_RETURN(result))
2867 DEFINE_GETSCALARARRAYELEMENTS(T_INT, jint, Int, int
2868 , HOTSPOT_JNI_GETINTARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy),
2869 HOTSPOT_JNI_GETINTARRAYELEMENTS_RETURN((uint32_t*)result))
2870 DEFINE_GETSCALARARRAYELEMENTS(T_LONG, jlong, Long, long
2871 , HOTSPOT_JNI_GETLONGARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy),
2872 HOTSPOT_JNI_GETLONGARRAYELEMENTS_RETURN(((uintptr_t*)result)))
2873 // Float and double probes don't return value because dtrace doesn't currently support it
2874 DEFINE_GETSCALARARRAYELEMENTS(T_FLOAT, jfloat, Float, float
2875 , HOTSPOT_JNI_GETFLOATARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy),
2876 HOTSPOT_JNI_GETFLOATARRAYELEMENTS_RETURN(result))
2877 DEFINE_GETSCALARARRAYELEMENTS(T_DOUBLE, jdouble, Double, double
2878 , HOTSPOT_JNI_GETDOUBLEARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy),
2879 HOTSPOT_JNI_GETDOUBLEARRAYELEMENTS_RETURN(result))
2880
2881
2882 #define DEFINE_RELEASESCALARARRAYELEMENTS(ElementTag,ElementType,Result,Tag \
2883 , EntryProbe, ReturnProbe);\
2884 \
2885 JNI_ENTRY_NO_PRESERVE(void, \
2886 jni_Release##Result##ArrayElements(JNIEnv *env, ElementType##Array array, \
2887 ElementType *buf, jint mode)) \
2888 JNIWrapper("Release" XSTR(Result) "ArrayElements"); \
2889 EntryProbe; \
2890 typeArrayOop a = typeArrayOop(JNIHandles::resolve_non_null(array)); \
2891 int len = a->length(); \
2892 if (len != 0) { /* Empty array: nothing to free or copy. */ \
2893 if ((mode == 0) || (mode == JNI_COMMIT)) { \
2894 ArrayAccess<>::arraycopy_from_native(buf, a, typeArrayOopDesc::element_offset<ElementType>(0), len); \
2895 } \
2896 if ((mode == 0) || (mode == JNI_ABORT)) { \
2897 FreeHeap(buf); \
2898 } \
2899 } \
2900 ReturnProbe; \
2901 JNI_END
2902
2903 DEFINE_RELEASESCALARARRAYELEMENTS(T_BOOLEAN, jboolean, Boolean, bool
2904 , HOTSPOT_JNI_RELEASEBOOLEANARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) buf, mode),
2905 HOTSPOT_JNI_RELEASEBOOLEANARRAYELEMENTS_RETURN())
2906 DEFINE_RELEASESCALARARRAYELEMENTS(T_BYTE, jbyte, Byte, byte
2907 , HOTSPOT_JNI_RELEASEBYTEARRAYELEMENTS_ENTRY(env, array, (char *) buf, mode),
2908 HOTSPOT_JNI_RELEASEBYTEARRAYELEMENTS_RETURN())
2909 DEFINE_RELEASESCALARARRAYELEMENTS(T_SHORT, jshort, Short, short
2910 , HOTSPOT_JNI_RELEASESHORTARRAYELEMENTS_ENTRY(env, array, (uint16_t *) buf, mode),
2911 HOTSPOT_JNI_RELEASESHORTARRAYELEMENTS_RETURN())
2912 DEFINE_RELEASESCALARARRAYELEMENTS(T_CHAR, jchar, Char, char
2913 , HOTSPOT_JNI_RELEASECHARARRAYELEMENTS_ENTRY(env, array, (uint16_t *) buf, mode),
2914 HOTSPOT_JNI_RELEASECHARARRAYELEMENTS_RETURN())
2915 DEFINE_RELEASESCALARARRAYELEMENTS(T_INT, jint, Int, int
2916 , HOTSPOT_JNI_RELEASEINTARRAYELEMENTS_ENTRY(env, array, (uint32_t *) buf, mode),
2917 HOTSPOT_JNI_RELEASEINTARRAYELEMENTS_RETURN())
2918 DEFINE_RELEASESCALARARRAYELEMENTS(T_LONG, jlong, Long, long
2919 , HOTSPOT_JNI_RELEASELONGARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) buf, mode),
2920 HOTSPOT_JNI_RELEASELONGARRAYELEMENTS_RETURN())
2921 DEFINE_RELEASESCALARARRAYELEMENTS(T_FLOAT, jfloat, Float, float
2922 , HOTSPOT_JNI_RELEASEFLOATARRAYELEMENTS_ENTRY(env, array, (float *) buf, mode),
2923 HOTSPOT_JNI_RELEASEFLOATARRAYELEMENTS_RETURN())
2924 DEFINE_RELEASESCALARARRAYELEMENTS(T_DOUBLE, jdouble, Double, double
2925 , HOTSPOT_JNI_RELEASEDOUBLEARRAYELEMENTS_ENTRY(env, array, (double *) buf, mode),
2926 HOTSPOT_JNI_RELEASEDOUBLEARRAYELEMENTS_RETURN())
2927
2928 static void check_bounds(jsize start, jsize copy_len, jsize array_len, TRAPS) {
2929 ResourceMark rm(THREAD);
2930 if (copy_len < 0) {
2931 stringStream ss;
2932 ss.print("Length %d is negative", copy_len);
2933 THROW_MSG(vmSymbols::java_lang_ArrayIndexOutOfBoundsException(), ss.as_string());
2934 } else if (start < 0 || (start > array_len - copy_len)) {
2935 stringStream ss;
2936 ss.print("Array region %d.." INT64_FORMAT " out of bounds for length %d",
2937 start, (int64_t)start+(int64_t)copy_len, array_len);
2938 THROW_MSG(vmSymbols::java_lang_ArrayIndexOutOfBoundsException(), ss.as_string());
2939 }
2940 }
2941
2942 #define DEFINE_GETSCALARARRAYREGION(ElementTag,ElementType,Result, Tag \
2943 , EntryProbe, ReturnProbe); \
2944 DT_VOID_RETURN_MARK_DECL(Get##Result##ArrayRegion \
2945 , ReturnProbe); \
2946 \
2947 JNI_ENTRY(void, \
2948 jni_Get##Result##ArrayRegion(JNIEnv *env, ElementType##Array array, jsize start, \
2949 jsize len, ElementType *buf)) \
2950 JNIWrapper("Get" XSTR(Result) "ArrayRegion"); \
2951 EntryProbe; \
2952 DT_VOID_RETURN_MARK(Get##Result##ArrayRegion); \
2953 typeArrayOop src = typeArrayOop(JNIHandles::resolve_non_null(array)); \
2954 check_bounds(start, len, src->length(), CHECK); \
2955 if (len > 0) { \
2956 ArrayAccess<>::arraycopy_to_native(src, typeArrayOopDesc::element_offset<ElementType>(start), buf, len); \
2957 } \
2958 JNI_END
2959
2960 DEFINE_GETSCALARARRAYREGION(T_BOOLEAN, jboolean,Boolean, bool
2961 , HOTSPOT_JNI_GETBOOLEANARRAYREGION_ENTRY(env, array, start, len, (uintptr_t *) buf),
2962 HOTSPOT_JNI_GETBOOLEANARRAYREGION_RETURN());
2963 DEFINE_GETSCALARARRAYREGION(T_BYTE, jbyte, Byte, byte
2964 , HOTSPOT_JNI_GETBYTEARRAYREGION_ENTRY(env, array, start, len, (char *) buf),
2965 HOTSPOT_JNI_GETBYTEARRAYREGION_RETURN());
2966 DEFINE_GETSCALARARRAYREGION(T_SHORT, jshort, Short, short
2967 , HOTSPOT_JNI_GETSHORTARRAYREGION_ENTRY(env, array, start, len, (uint16_t *) buf),
2968 HOTSPOT_JNI_GETSHORTARRAYREGION_RETURN());
2969 DEFINE_GETSCALARARRAYREGION(T_CHAR, jchar, Char, char
2970 , HOTSPOT_JNI_GETCHARARRAYREGION_ENTRY(env, array, start, len, (uint16_t*) buf),
2971 HOTSPOT_JNI_GETCHARARRAYREGION_RETURN());
2972 DEFINE_GETSCALARARRAYREGION(T_INT, jint, Int, int
2973 , HOTSPOT_JNI_GETINTARRAYREGION_ENTRY(env, array, start, len, (uint32_t*) buf),
2974 HOTSPOT_JNI_GETINTARRAYREGION_RETURN());
2975 DEFINE_GETSCALARARRAYREGION(T_LONG, jlong, Long, long
2976 , HOTSPOT_JNI_GETLONGARRAYREGION_ENTRY(env, array, start, len, (uintptr_t *) buf),
2977 HOTSPOT_JNI_GETLONGARRAYREGION_RETURN());
2978 DEFINE_GETSCALARARRAYREGION(T_FLOAT, jfloat, Float, float
2979 , HOTSPOT_JNI_GETFLOATARRAYREGION_ENTRY(env, array, start, len, (float *) buf),
2980 HOTSPOT_JNI_GETFLOATARRAYREGION_RETURN());
2981 DEFINE_GETSCALARARRAYREGION(T_DOUBLE, jdouble, Double, double
2982 , HOTSPOT_JNI_GETDOUBLEARRAYREGION_ENTRY(env, array, start, len, (double *) buf),
2983 HOTSPOT_JNI_GETDOUBLEARRAYREGION_RETURN());
2984
2985
2986 #define DEFINE_SETSCALARARRAYREGION(ElementTag,ElementType,Result, Tag \
2987 , EntryProbe, ReturnProbe); \
2988 DT_VOID_RETURN_MARK_DECL(Set##Result##ArrayRegion \
2989 ,ReturnProbe); \
2990 \
2991 JNI_ENTRY(void, \
2992 jni_Set##Result##ArrayRegion(JNIEnv *env, ElementType##Array array, jsize start, \
2993 jsize len, const ElementType *buf)) \
2994 JNIWrapper("Set" XSTR(Result) "ArrayRegion"); \
2995 EntryProbe; \
2996 DT_VOID_RETURN_MARK(Set##Result##ArrayRegion); \
2997 typeArrayOop dst = typeArrayOop(JNIHandles::resolve_non_null(array)); \
2998 check_bounds(start, len, dst->length(), CHECK); \
2999 if (len > 0) { \
3000 ArrayAccess<>::arraycopy_from_native(buf, dst, typeArrayOopDesc::element_offset<ElementType>(start), len); \
3001 } \
3002 JNI_END
3003
3004 DEFINE_SETSCALARARRAYREGION(T_BOOLEAN, jboolean, Boolean, bool
3005 , HOTSPOT_JNI_SETBOOLEANARRAYREGION_ENTRY(env, array, start, len, (uintptr_t *)buf),
3006 HOTSPOT_JNI_SETBOOLEANARRAYREGION_RETURN())
3007 DEFINE_SETSCALARARRAYREGION(T_BYTE, jbyte, Byte, byte
3008 , HOTSPOT_JNI_SETBYTEARRAYREGION_ENTRY(env, array, start, len, (char *) buf),
3009 HOTSPOT_JNI_SETBYTEARRAYREGION_RETURN())
3010 DEFINE_SETSCALARARRAYREGION(T_SHORT, jshort, Short, short
3011 , HOTSPOT_JNI_SETSHORTARRAYREGION_ENTRY(env, array, start, len, (uint16_t *) buf),
3012 HOTSPOT_JNI_SETSHORTARRAYREGION_RETURN())
3013 DEFINE_SETSCALARARRAYREGION(T_CHAR, jchar, Char, char
3014 , HOTSPOT_JNI_SETCHARARRAYREGION_ENTRY(env, array, start, len, (uint16_t *) buf),
3015 HOTSPOT_JNI_SETCHARARRAYREGION_RETURN())
3016 DEFINE_SETSCALARARRAYREGION(T_INT, jint, Int, int
3017 , HOTSPOT_JNI_SETINTARRAYREGION_ENTRY(env, array, start, len, (uint32_t *) buf),
3018 HOTSPOT_JNI_SETINTARRAYREGION_RETURN())
3019 DEFINE_SETSCALARARRAYREGION(T_LONG, jlong, Long, long
3020 , HOTSPOT_JNI_SETLONGARRAYREGION_ENTRY(env, array, start, len, (uintptr_t *) buf),
3021 HOTSPOT_JNI_SETLONGARRAYREGION_RETURN())
3022 DEFINE_SETSCALARARRAYREGION(T_FLOAT, jfloat, Float, float
3023 , HOTSPOT_JNI_SETFLOATARRAYREGION_ENTRY(env, array, start, len, (float *) buf),
3024 HOTSPOT_JNI_SETFLOATARRAYREGION_RETURN())
3025 DEFINE_SETSCALARARRAYREGION(T_DOUBLE, jdouble, Double, double
3026 , HOTSPOT_JNI_SETDOUBLEARRAYREGION_ENTRY(env, array, start, len, (double *) buf),
3027 HOTSPOT_JNI_SETDOUBLEARRAYREGION_RETURN())
3028
3029
3030 DT_RETURN_MARK_DECL(RegisterNatives, jint
3031 , HOTSPOT_JNI_REGISTERNATIVES_RETURN(_ret_ref));
3032
3033 JNI_ENTRY(jint, jni_RegisterNatives(JNIEnv *env, jclass clazz,
3034 const JNINativeMethod *methods,
3035 jint nMethods))
3036 JNIWrapper("RegisterNatives");
3037 HOTSPOT_JNI_REGISTERNATIVES_ENTRY(env, clazz, (void *) methods, nMethods);
3038 jint ret = 0;
3039 DT_RETURN_MARK(RegisterNatives, jint, (const jint&)ret);
3040
3041 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz));
3042
3043 for (int index = 0; index < nMethods; index++) {
3044 const char* meth_name = methods[index].name;
3045 const char* meth_sig = methods[index].signature;
3046 int meth_name_len = (int)strlen(meth_name);
3047
3048 // The class should have been loaded (we have an instance of the class
3049 // passed in) so the method and signature should already be in the symbol
3050 // table. If they're not there, the method doesn't exist.
3051 TempNewSymbol name = SymbolTable::probe(meth_name, meth_name_len);
3052 TempNewSymbol signature = SymbolTable::probe(meth_sig, (int)strlen(meth_sig));
3053
3054 if (name == NULL || signature == NULL) {
3055 ResourceMark rm;
3056 stringStream st;
3057 st.print("Method %s.%s%s not found", k->external_name(), meth_name, meth_sig);
3058 // Must return negative value on failure
3059 THROW_MSG_(vmSymbols::java_lang_NoSuchMethodError(), st.as_string(), -1);
3060 }
3061
3062 bool res = Method::register_native(k, name, signature,
3063 (address) methods[index].fnPtr, THREAD);
3064 if (!res) {
3065 ret = -1;
3066 break;
3067 }
3068 }
3069 return ret;
3070 JNI_END
3071
3072
3073 JNI_ENTRY(jint, jni_UnregisterNatives(JNIEnv *env, jclass clazz))
3074 JNIWrapper("UnregisterNatives");
3075 HOTSPOT_JNI_UNREGISTERNATIVES_ENTRY(env, clazz);
3076 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz));
3077 //%note jni_2
3078 if (k->is_instance_klass()) {
3079 for (int index = 0; index < InstanceKlass::cast(k)->methods()->length(); index++) {
3080 Method* m = InstanceKlass::cast(k)->methods()->at(index);
3081 if (m->is_native()) {
3082 m->clear_native_function();
3083 m->set_signature_handler(NULL);
3084 }
3085 }
3086 }
3087 HOTSPOT_JNI_UNREGISTERNATIVES_RETURN(0);
3088 return 0;
3089 JNI_END
3090
3091 //
3092 // Monitor functions
3093 //
3094
3095 DT_RETURN_MARK_DECL(MonitorEnter, jint
3096 , HOTSPOT_JNI_MONITORENTER_RETURN(_ret_ref));
3097
3098 JNI_ENTRY(jint, jni_MonitorEnter(JNIEnv *env, jobject jobj))
3099 HOTSPOT_JNI_MONITORENTER_ENTRY(env, jobj);
3100 jint ret = JNI_ERR;
3101 DT_RETURN_MARK(MonitorEnter, jint, (const jint&)ret);
3102
3103 // If the object is null, we can't do anything with it
3104 if (jobj == NULL) {
3105 THROW_(vmSymbols::java_lang_NullPointerException(), JNI_ERR);
3106 }
3107
3108 Handle obj(thread, JNIHandles::resolve_non_null(jobj));
3109 ObjectSynchronizer::jni_enter(obj, CHECK_(JNI_ERR));
3110 ret = JNI_OK;
3111 return ret;
3112 JNI_END
3113
3114 DT_RETURN_MARK_DECL(MonitorExit, jint
3115 , HOTSPOT_JNI_MONITOREXIT_RETURN(_ret_ref));
3116
3117 JNI_ENTRY(jint, jni_MonitorExit(JNIEnv *env, jobject jobj))
3118 HOTSPOT_JNI_MONITOREXIT_ENTRY(env, jobj);
3119 jint ret = JNI_ERR;
3120 DT_RETURN_MARK(MonitorExit, jint, (const jint&)ret);
3121
3122 // Don't do anything with a null object
3123 if (jobj == NULL) {
3124 THROW_(vmSymbols::java_lang_NullPointerException(), JNI_ERR);
3125 }
3126
3127 Handle obj(THREAD, JNIHandles::resolve_non_null(jobj));
3128 ObjectSynchronizer::jni_exit(obj(), CHECK_(JNI_ERR));
3129
3130 ret = JNI_OK;
3131 return ret;
3132 JNI_END
3133
3134 //
3135 // Extensions
3136 //
3137
3138 DT_VOID_RETURN_MARK_DECL(GetStringRegion
3139 , HOTSPOT_JNI_GETSTRINGREGION_RETURN());
3140
3141 JNI_ENTRY(void, jni_GetStringRegion(JNIEnv *env, jstring string, jsize start, jsize len, jchar *buf))
3142 JNIWrapper("GetStringRegion");
3143 HOTSPOT_JNI_GETSTRINGREGION_ENTRY(env, string, start, len, buf);
3144 DT_VOID_RETURN_MARK(GetStringRegion);
3145 oop s = JNIHandles::resolve_non_null(string);
3146 typeArrayOop s_value = java_lang_String::value(s);
3147 int s_len = java_lang_String::length(s, s_value);
3148 if (start < 0 || len < 0 || start > s_len - len) {
3149 THROW(vmSymbols::java_lang_StringIndexOutOfBoundsException());
3150 } else {
3151 if (len > 0) {
3152 bool is_latin1 = java_lang_String::is_latin1(s);
3153 if (!is_latin1) {
3154 ArrayAccess<>::arraycopy_to_native(s_value, typeArrayOopDesc::element_offset<jchar>(start),
3155 buf, len);
3156 } else {
3157 for (int i = 0; i < len; i++) {
3158 buf[i] = ((jchar) s_value->byte_at(i + start)) & 0xff;
3159 }
3160 }
3161 }
3162 }
3163 JNI_END
3164
3165 DT_VOID_RETURN_MARK_DECL(GetStringUTFRegion
3166 , HOTSPOT_JNI_GETSTRINGUTFREGION_RETURN());
3167
3168 JNI_ENTRY(void, jni_GetStringUTFRegion(JNIEnv *env, jstring string, jsize start, jsize len, char *buf))
3169 JNIWrapper("GetStringUTFRegion");
3170 HOTSPOT_JNI_GETSTRINGUTFREGION_ENTRY(env, string, start, len, buf);
3171 DT_VOID_RETURN_MARK(GetStringUTFRegion);
3172 oop s = JNIHandles::resolve_non_null(string);
3173 typeArrayOop s_value = java_lang_String::value(s);
3174 int s_len = java_lang_String::length(s, s_value);
3175 if (start < 0 || len < 0 || start > s_len - len) {
3176 THROW(vmSymbols::java_lang_StringIndexOutOfBoundsException());
3177 } else {
3178 //%note jni_7
3179 if (len > 0) {
3180 // Assume the buffer is large enough as the JNI spec. does not require user error checking
3181 java_lang_String::as_utf8_string(s, s_value, start, len, buf, INT_MAX);
3182 // as_utf8_string null-terminates the result string
3183 } else {
3184 // JDK null-terminates the buffer even in len is zero
3185 if (buf != NULL) {
3186 buf[0] = 0;
3187 }
3188 }
3189 }
3190 JNI_END
3191
3192 static oop lock_gc_or_pin_object(JavaThread* thread, jobject obj) {
3193 if (Universe::heap()->supports_object_pinning()) {
3194 const oop o = JNIHandles::resolve_non_null(obj);
3195 return Universe::heap()->pin_object(thread, o);
3196 } else {
3197 GCLocker::lock_critical(thread);
3198 return JNIHandles::resolve_non_null(obj);
3199 }
3200 }
3201
3202 static void unlock_gc_or_unpin_object(JavaThread* thread, jobject obj) {
3203 if (Universe::heap()->supports_object_pinning()) {
3204 const oop o = JNIHandles::resolve_non_null(obj);
3205 return Universe::heap()->unpin_object(thread, o);
3206 } else {
3207 GCLocker::unlock_critical(thread);
3208 }
3209 }
3210
3211 JNI_ENTRY(void*, jni_GetPrimitiveArrayCritical(JNIEnv *env, jarray array, jboolean *isCopy))
3212 JNIWrapper("GetPrimitiveArrayCritical");
3213 HOTSPOT_JNI_GETPRIMITIVEARRAYCRITICAL_ENTRY(env, array, (uintptr_t *) isCopy);
3214 if (isCopy != NULL) {
3215 *isCopy = JNI_FALSE;
3216 }
3217 oop a = lock_gc_or_pin_object(thread, array);
3218 assert(a->is_array(), "just checking");
3219 BasicType type;
3220 if (a->is_objArray()) {
3221 type = T_OBJECT;
3222 } else {
3223 type = TypeArrayKlass::cast(a->klass())->element_type();
3224 }
3225 void* ret = arrayOop(a)->base(type);
3226 HOTSPOT_JNI_GETPRIMITIVEARRAYCRITICAL_RETURN(ret);
3227 return ret;
3228 JNI_END
3229
3230
3231 JNI_ENTRY(void, jni_ReleasePrimitiveArrayCritical(JNIEnv *env, jarray array, void *carray, jint mode))
3232 JNIWrapper("ReleasePrimitiveArrayCritical");
3233 HOTSPOT_JNI_RELEASEPRIMITIVEARRAYCRITICAL_ENTRY(env, array, carray, mode);
3234 unlock_gc_or_unpin_object(thread, array);
3235 HOTSPOT_JNI_RELEASEPRIMITIVEARRAYCRITICAL_RETURN();
3236 JNI_END
3237
3238
3239 JNI_ENTRY(const jchar*, jni_GetStringCritical(JNIEnv *env, jstring string, jboolean *isCopy))
3240 JNIWrapper("GetStringCritical");
3241 HOTSPOT_JNI_GETSTRINGCRITICAL_ENTRY(env, string, (uintptr_t *) isCopy);
3242 oop s = lock_gc_or_pin_object(thread, string);
3243 typeArrayOop s_value = java_lang_String::value(s);
3244 bool is_latin1 = java_lang_String::is_latin1(s);
3245 if (isCopy != NULL) {
3246 *isCopy = is_latin1 ? JNI_TRUE : JNI_FALSE;
3247 }
3248 jchar* ret;
3249 if (!is_latin1) {
3250 ret = (jchar*) s_value->base(T_CHAR);
3251 } else {
3252 // Inflate latin1 encoded string to UTF16
3253 int s_len = java_lang_String::length(s, s_value);
3254 ret = NEW_C_HEAP_ARRAY_RETURN_NULL(jchar, s_len + 1, mtInternal); // add one for zero termination
3255 /* JNI Specification states return NULL on OOM */
3256 if (ret != NULL) {
3257 for (int i = 0; i < s_len; i++) {
3258 ret[i] = ((jchar) s_value->byte_at(i)) & 0xff;
3259 }
3260 ret[s_len] = 0;
3261 }
3262 }
3263 HOTSPOT_JNI_GETSTRINGCRITICAL_RETURN((uint16_t *) ret);
3264 return ret;
3265 JNI_END
3266
3267
3268 JNI_ENTRY(void, jni_ReleaseStringCritical(JNIEnv *env, jstring str, const jchar *chars))
3269 JNIWrapper("ReleaseStringCritical");
3270 HOTSPOT_JNI_RELEASESTRINGCRITICAL_ENTRY(env, str, (uint16_t *) chars);
3271 // The str and chars arguments are ignored for UTF16 strings
3272 oop s = JNIHandles::resolve_non_null(str);
3273 bool is_latin1 = java_lang_String::is_latin1(s);
3274 if (is_latin1) {
3275 // For latin1 string, free jchar array allocated by earlier call to GetStringCritical.
3276 // This assumes that ReleaseStringCritical bookends GetStringCritical.
3277 FREE_C_HEAP_ARRAY(jchar, chars);
3278 }
3279 unlock_gc_or_unpin_object(thread, str);
3280 HOTSPOT_JNI_RELEASESTRINGCRITICAL_RETURN();
3281 JNI_END
3282
3283
3284 JNI_ENTRY(jweak, jni_NewWeakGlobalRef(JNIEnv *env, jobject ref))
3285 JNIWrapper("jni_NewWeakGlobalRef");
3286 HOTSPOT_JNI_NEWWEAKGLOBALREF_ENTRY(env, ref);
3287 Handle ref_handle(thread, JNIHandles::resolve(ref));
3288 jweak ret = JNIHandles::make_weak_global(ref_handle);
3289 HOTSPOT_JNI_NEWWEAKGLOBALREF_RETURN(ret);
3290 return ret;
3291 JNI_END
3292
3293 // Must be JNI_ENTRY (with HandleMark)
3294 JNI_ENTRY(void, jni_DeleteWeakGlobalRef(JNIEnv *env, jweak ref))
3295 JNIWrapper("jni_DeleteWeakGlobalRef");
3296 HOTSPOT_JNI_DELETEWEAKGLOBALREF_ENTRY(env, ref);
3297 JNIHandles::destroy_weak_global(ref);
3298 HOTSPOT_JNI_DELETEWEAKGLOBALREF_RETURN();
3299 JNI_END
3300
3301
3302 JNI_ENTRY_NO_PRESERVE(jboolean, jni_ExceptionCheck(JNIEnv *env))
3303 JNIWrapper("jni_ExceptionCheck");
3304 HOTSPOT_JNI_EXCEPTIONCHECK_ENTRY(env);
3305 jni_check_async_exceptions(thread);
3306 jboolean ret = (thread->has_pending_exception()) ? JNI_TRUE : JNI_FALSE;
3307 HOTSPOT_JNI_EXCEPTIONCHECK_RETURN(ret);
3308 return ret;
3309 JNI_END
3310
3311
3312 // Initialization state for three routines below relating to
3313 // java.nio.DirectBuffers
3314 static int directBufferSupportInitializeStarted = 0;
3315 static volatile int directBufferSupportInitializeEnded = 0;
3316 static volatile int directBufferSupportInitializeFailed = 0;
3317 static jclass bufferClass = NULL;
3318 static jclass directBufferClass = NULL;
3319 static jclass directByteBufferClass = NULL;
3320 static jmethodID directByteBufferConstructor = NULL;
3321 static jfieldID directBufferAddressField = NULL;
3322 static jfieldID bufferCapacityField = NULL;
3323
3324 static jclass lookupOne(JNIEnv* env, const char* name, TRAPS) {
3325 Handle loader; // null (bootstrap) loader
3326 Handle protection_domain; // null protection domain
3327
3328 TempNewSymbol sym = SymbolTable::new_symbol(name);
3329 jclass result = find_class_from_class_loader(env, sym, true, loader, protection_domain, true, CHECK_NULL);
3330
3331 if (log_is_enabled(Debug, class, resolve) && result != NULL) {
3332 trace_class_resolution(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(result)));
3333 }
3334 return result;
3335 }
3336
3337 // These lookups are done with the NULL (bootstrap) ClassLoader to
3338 // circumvent any security checks that would be done by jni_FindClass.
3339 JNI_ENTRY(bool, lookupDirectBufferClasses(JNIEnv* env))
3340 {
3341 if ((bufferClass = lookupOne(env, "java/nio/Buffer", thread)) == NULL) { return false; }
3342 if ((directBufferClass = lookupOne(env, "sun/nio/ch/DirectBuffer", thread)) == NULL) { return false; }
3343 if ((directByteBufferClass = lookupOne(env, "java/nio/DirectByteBuffer", thread)) == NULL) { return false; }
3344 return true;
3345 }
3346 JNI_END
3347
3348
3349 static bool initializeDirectBufferSupport(JNIEnv* env, JavaThread* thread) {
3350 if (directBufferSupportInitializeFailed) {
3351 return false;
3352 }
3353
3354 if (Atomic::cmpxchg(&directBufferSupportInitializeStarted, 0, 1) == 0) {
3355 if (!lookupDirectBufferClasses(env)) {
3356 directBufferSupportInitializeFailed = 1;
3357 return false;
3358 }
3359
3360 // Make global references for these
3361 bufferClass = (jclass) env->NewGlobalRef(bufferClass);
3362 directBufferClass = (jclass) env->NewGlobalRef(directBufferClass);
3363 directByteBufferClass = (jclass) env->NewGlobalRef(directByteBufferClass);
3364
3365 // Get needed field and method IDs
3366 directByteBufferConstructor = env->GetMethodID(directByteBufferClass, "<init>", "(JI)V");
3367 if (env->ExceptionCheck()) {
3368 env->ExceptionClear();
3369 directBufferSupportInitializeFailed = 1;
3370 return false;
3371 }
3372 directBufferAddressField = env->GetFieldID(bufferClass, "address", "J");
3373 if (env->ExceptionCheck()) {
3374 env->ExceptionClear();
3375 directBufferSupportInitializeFailed = 1;
3376 return false;
3377 }
3378 bufferCapacityField = env->GetFieldID(bufferClass, "capacity", "I");
3379 if (env->ExceptionCheck()) {
3380 env->ExceptionClear();
3381 directBufferSupportInitializeFailed = 1;
3382 return false;
3383 }
3384
3385 if ((directByteBufferConstructor == NULL) ||
3386 (directBufferAddressField == NULL) ||
3387 (bufferCapacityField == NULL)) {
3388 directBufferSupportInitializeFailed = 1;
3389 return false;
3390 }
3391
3392 directBufferSupportInitializeEnded = 1;
3393 } else {
3394 while (!directBufferSupportInitializeEnded && !directBufferSupportInitializeFailed) {
3395 os::naked_yield();
3396 }
3397 }
3398
3399 return !directBufferSupportInitializeFailed;
3400 }
3401
3402 extern "C" jobject JNICALL jni_NewDirectByteBuffer(JNIEnv *env, void* address, jlong capacity)
3403 {
3404 // thread_from_jni_environment() will block if VM is gone.
3405 JavaThread* thread = JavaThread::thread_from_jni_environment(env);
3406
3407 JNIWrapper("jni_NewDirectByteBuffer");
3408 HOTSPOT_JNI_NEWDIRECTBYTEBUFFER_ENTRY(env, address, capacity);
3409
3410 if (!directBufferSupportInitializeEnded) {
3411 if (!initializeDirectBufferSupport(env, thread)) {
3412 HOTSPOT_JNI_NEWDIRECTBYTEBUFFER_RETURN(NULL);
3413 return NULL;
3414 }
3415 }
3416
3417 // Being paranoid about accidental sign extension on address
3418 jlong addr = (jlong) ((uintptr_t) address);
3419 // NOTE that package-private DirectByteBuffer constructor currently
3420 // takes int capacity
3421 jint cap = (jint) capacity;
3422 jobject ret = env->NewObject(directByteBufferClass, directByteBufferConstructor, addr, cap);
3423 HOTSPOT_JNI_NEWDIRECTBYTEBUFFER_RETURN(ret);
3424 return ret;
3425 }
3426
3427 DT_RETURN_MARK_DECL(GetDirectBufferAddress, void*
3428 , HOTSPOT_JNI_GETDIRECTBUFFERADDRESS_RETURN((void*) _ret_ref));
3429
3430 extern "C" void* JNICALL jni_GetDirectBufferAddress(JNIEnv *env, jobject buf)
3431 {
3432 // thread_from_jni_environment() will block if VM is gone.
3433 JavaThread* thread = JavaThread::thread_from_jni_environment(env);
3434
3435 JNIWrapper("jni_GetDirectBufferAddress");
3436 HOTSPOT_JNI_GETDIRECTBUFFERADDRESS_ENTRY(env, buf);
3437 void* ret = NULL;
3438 DT_RETURN_MARK(GetDirectBufferAddress, void*, (const void*&)ret);
3439
3440 if (!directBufferSupportInitializeEnded) {
3441 if (!initializeDirectBufferSupport(env, thread)) {
3442 return 0;
3443 }
3444 }
3445
3446 if ((buf != NULL) && (!env->IsInstanceOf(buf, directBufferClass))) {
3447 return 0;
3448 }
3449
3450 ret = (void*)(intptr_t)env->GetLongField(buf, directBufferAddressField);
3451 return ret;
3452 }
3453
3454 DT_RETURN_MARK_DECL(GetDirectBufferCapacity, jlong
3455 , HOTSPOT_JNI_GETDIRECTBUFFERCAPACITY_RETURN(_ret_ref));
3456
3457 extern "C" jlong JNICALL jni_GetDirectBufferCapacity(JNIEnv *env, jobject buf)
3458 {
3459 // thread_from_jni_environment() will block if VM is gone.
3460 JavaThread* thread = JavaThread::thread_from_jni_environment(env);
3461
3462 JNIWrapper("jni_GetDirectBufferCapacity");
3463 HOTSPOT_JNI_GETDIRECTBUFFERCAPACITY_ENTRY(env, buf);
3464 jlong ret = -1;
3465 DT_RETURN_MARK(GetDirectBufferCapacity, jlong, (const jlong&)ret);
3466
3467 if (!directBufferSupportInitializeEnded) {
3468 if (!initializeDirectBufferSupport(env, thread)) {
3469 ret = 0;
3470 return ret;
3471 }
3472 }
3473
3474 if (buf == NULL) {
3475 return -1;
3476 }
3477
3478 if (!env->IsInstanceOf(buf, directBufferClass)) {
3479 return -1;
3480 }
3481
3482 // NOTE that capacity is currently an int in the implementation
3483 ret = env->GetIntField(buf, bufferCapacityField);
3484 return ret;
3485 }
3486
3487
3488 JNI_LEAF(jint, jni_GetVersion(JNIEnv *env))
3489 JNIWrapper("GetVersion");
3490 HOTSPOT_JNI_GETVERSION_ENTRY(env);
3491 HOTSPOT_JNI_GETVERSION_RETURN(CurrentVersion);
3492 return CurrentVersion;
3493 JNI_END
3494
3495 extern struct JavaVM_ main_vm;
3496
3497 JNI_LEAF(jint, jni_GetJavaVM(JNIEnv *env, JavaVM **vm))
3498 JNIWrapper("jni_GetJavaVM");
3499 HOTSPOT_JNI_GETJAVAVM_ENTRY(env, (void **) vm);
3500 *vm = (JavaVM *)(&main_vm);
3501 HOTSPOT_JNI_GETJAVAVM_RETURN(JNI_OK);
3502 return JNI_OK;
3503 JNI_END
3504
3505
3506 JNI_ENTRY(jobject, jni_GetModule(JNIEnv* env, jclass clazz))
3507 JNIWrapper("GetModule");
3508 return Modules::get_module(clazz, THREAD);
3509 JNI_END
3510
3511
3512 JNI_ENTRY(void*, jni_GetFlattenedArrayElements(JNIEnv* env, jarray array, jboolean* isCopy))
3513 JNIWrapper("jni_GetFlattenedArrayElements");
3514 if (isCopy != NULL) {
3515 *isCopy = JNI_FALSE;
3516 }
3517 arrayOop ar = arrayOop(JNIHandles::resolve_non_null(array));
3518 if (!ar->is_array()) {
3519 THROW_MSG_NULL(vmSymbols::java_lang_IllegalArgumentException(), "Not an array");
3520 }
3521 if (!ar->is_valueArray()) {
3522 THROW_MSG_NULL(vmSymbols::java_lang_IllegalArgumentException(), "Not a flattened array");
3523 }
3524 ValueArrayKlass* vak = ValueArrayKlass::cast(ar->klass());
3525 if (vak->contains_oops()) {
3526 THROW_MSG_NULL(vmSymbols::java_lang_IllegalArgumentException(), "Flattened array contains oops");
3527 }
3528 oop a = lock_gc_or_pin_object(thread, array);
3529 valueArrayOop vap = valueArrayOop(a);
3530 void* ret = vap->value_at_addr(0, vak->layout_helper());
3531 return ret;
3532 JNI_END
3533
3534 JNI_ENTRY(void, jni_ReleaseFlattenedArrayElements(JNIEnv* env, jarray array, void* elem, jint mode))
3535 JNIWrapper("jni_ReleaseFlattenedArrayElements");
3536 unlock_gc_or_unpin_object(thread, array);
3537 JNI_END
3538
3539 JNI_ENTRY(jsize, jni_GetFlattenedArrayElementSize(JNIEnv* env, jarray array)) {
3540 JNIWrapper("jni_GetFlattenedElementSize");
3541 arrayOop a = arrayOop(JNIHandles::resolve_non_null(array));
3542 if (!a->is_array()) {
3543 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Not an array");
3544 }
3545 if (!a->is_valueArray()) {
3546 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Not a flattened array");
3547 }
3548 ValueArrayKlass* vak = ValueArrayKlass::cast(a->klass());
3549 jsize ret = vak->element_byte_size();
3550 return ret;
3551 }
3552 JNI_END
3553
3554 JNI_ENTRY(jclass, jni_GetFlattenedArrayElementClass(JNIEnv* env, jarray array))
3555 JNIWrapper("jni_GetArrayElementClass");
3556 arrayOop a = arrayOop(JNIHandles::resolve_non_null(array));
3557 if (!a->is_array()) {
3558 THROW_MSG_NULL(vmSymbols::java_lang_IllegalArgumentException(), "Not an array");
3559 }
3560 if (!a->is_valueArray()) {
3561 THROW_MSG_NULL(vmSymbols::java_lang_IllegalArgumentException(), "Not a flattened array");
3562 }
3563 ValueArrayKlass* vak = ValueArrayKlass::cast(a->klass());
3564 ValueKlass* vk = vak->element_klass();
3565 return (jclass) JNIHandles::make_local(vk->java_mirror());
3566 JNI_END
3567
3568 JNI_ENTRY(jsize, jni_GetFieldOffsetInFlattenedLayout(JNIEnv* env, jclass clazz, const char *name, const char *signature, jboolean* isFlattened))
3569 JNIWrapper("jni_GetFieldOffsetInFlattenedLayout");
3570
3571 oop mirror = JNIHandles::resolve_non_null(clazz);
3572 Klass* k = java_lang_Class::as_Klass(mirror);
3573 if (!k->is_value()) {
3574 ResourceMark rm;
3575 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), err_msg("%s has not flattened layout", k->external_name()));
3576 }
3577 ValueKlass* vk = ValueKlass::cast(k);
3578
3579 TempNewSymbol fieldname = SymbolTable::probe(name, (int)strlen(name));
3580 TempNewSymbol signame = SymbolTable::probe(signature, (int)strlen(signature));
3581 if (fieldname == NULL || signame == NULL) {
3582 ResourceMark rm;
3583 THROW_MSG_0(vmSymbols::java_lang_NoSuchFieldError(), err_msg("%s.%s %s", vk->external_name(), name, signature));
3584 }
3585
3586 assert(vk->is_initialized(), "If a flattened array has been created, the element klass must have been initialized");
3587
3588 fieldDescriptor fd;
3589 if (!vk->is_instance_klass() ||
3590 !InstanceKlass::cast(vk)->find_field(fieldname, signame, false, &fd)) {
3591 ResourceMark rm;
3592 THROW_MSG_0(vmSymbols::java_lang_NoSuchFieldError(), err_msg("%s.%s %s", vk->external_name(), name, signature));
3593 }
3594
3595 int offset = fd.offset() - vk->first_field_offset();
3596 if (isFlattened != NULL) {
3597 *isFlattened = fd.is_flattened();
3598 }
3599 return (jsize)offset;
3600 JNI_END
3601
3602 // Structure containing all jni functions
3603 struct JNINativeInterface_ jni_NativeInterface = {
3604 NULL,
3605 NULL,
3606 NULL,
3607
3608 NULL,
3609
3610 jni_GetVersion,
3611
3612 jni_DefineClass,
3613 jni_FindClass,
3614
3615 jni_FromReflectedMethod,
3616 jni_FromReflectedField,
3617
3618 jni_ToReflectedMethod,
3619
3620 jni_GetSuperclass,
3621 jni_IsAssignableFrom,
3622
3623 jni_ToReflectedField,
3624
3625 jni_Throw,
3626 jni_ThrowNew,
3627 jni_ExceptionOccurred,
3628 jni_ExceptionDescribe,
3629 jni_ExceptionClear,
3630 jni_FatalError,
3631
3632 jni_PushLocalFrame,
3633 jni_PopLocalFrame,
3634
3635 jni_NewGlobalRef,
3636 jni_DeleteGlobalRef,
3637 jni_DeleteLocalRef,
3638 jni_IsSameObject,
3639
3640 jni_NewLocalRef,
3641 jni_EnsureLocalCapacity,
3642
3643 jni_AllocObject,
3644 jni_NewObject,
3645 jni_NewObjectV,
3646 jni_NewObjectA,
3647
3648 jni_GetObjectClass,
3649 jni_IsInstanceOf,
3650
3651 jni_GetMethodID,
3652
3653 jni_CallObjectMethod,
3654 jni_CallObjectMethodV,
3655 jni_CallObjectMethodA,
3656 jni_CallBooleanMethod,
3657 jni_CallBooleanMethodV,
3658 jni_CallBooleanMethodA,
3659 jni_CallByteMethod,
3660 jni_CallByteMethodV,
3661 jni_CallByteMethodA,
3662 jni_CallCharMethod,
3663 jni_CallCharMethodV,
3664 jni_CallCharMethodA,
3665 jni_CallShortMethod,
3666 jni_CallShortMethodV,
3667 jni_CallShortMethodA,
3668 jni_CallIntMethod,
3669 jni_CallIntMethodV,
3670 jni_CallIntMethodA,
3671 jni_CallLongMethod,
3672 jni_CallLongMethodV,
3673 jni_CallLongMethodA,
3674 jni_CallFloatMethod,
3675 jni_CallFloatMethodV,
3676 jni_CallFloatMethodA,
3677 jni_CallDoubleMethod,
3678 jni_CallDoubleMethodV,
3679 jni_CallDoubleMethodA,
3680 jni_CallVoidMethod,
3681 jni_CallVoidMethodV,
3682 jni_CallVoidMethodA,
3683
3684 jni_CallNonvirtualObjectMethod,
3685 jni_CallNonvirtualObjectMethodV,
3686 jni_CallNonvirtualObjectMethodA,
3687 jni_CallNonvirtualBooleanMethod,
3688 jni_CallNonvirtualBooleanMethodV,
3689 jni_CallNonvirtualBooleanMethodA,
3690 jni_CallNonvirtualByteMethod,
3691 jni_CallNonvirtualByteMethodV,
3692 jni_CallNonvirtualByteMethodA,
3693 jni_CallNonvirtualCharMethod,
3694 jni_CallNonvirtualCharMethodV,
3695 jni_CallNonvirtualCharMethodA,
3696 jni_CallNonvirtualShortMethod,
3697 jni_CallNonvirtualShortMethodV,
3698 jni_CallNonvirtualShortMethodA,
3699 jni_CallNonvirtualIntMethod,
3700 jni_CallNonvirtualIntMethodV,
3701 jni_CallNonvirtualIntMethodA,
3702 jni_CallNonvirtualLongMethod,
3703 jni_CallNonvirtualLongMethodV,
3704 jni_CallNonvirtualLongMethodA,
3705 jni_CallNonvirtualFloatMethod,
3706 jni_CallNonvirtualFloatMethodV,
3707 jni_CallNonvirtualFloatMethodA,
3708 jni_CallNonvirtualDoubleMethod,
3709 jni_CallNonvirtualDoubleMethodV,
3710 jni_CallNonvirtualDoubleMethodA,
3711 jni_CallNonvirtualVoidMethod,
3712 jni_CallNonvirtualVoidMethodV,
3713 jni_CallNonvirtualVoidMethodA,
3714
3715 jni_GetFieldID,
3716
3717 jni_GetObjectField,
3718 jni_GetBooleanField,
3719 jni_GetByteField,
3720 jni_GetCharField,
3721 jni_GetShortField,
3722 jni_GetIntField,
3723 jni_GetLongField,
3724 jni_GetFloatField,
3725 jni_GetDoubleField,
3726
3727 jni_SetObjectField,
3728 jni_SetBooleanField,
3729 jni_SetByteField,
3730 jni_SetCharField,
3731 jni_SetShortField,
3732 jni_SetIntField,
3733 jni_SetLongField,
3734 jni_SetFloatField,
3735 jni_SetDoubleField,
3736
3737 jni_GetStaticMethodID,
3738
3739 jni_CallStaticObjectMethod,
3740 jni_CallStaticObjectMethodV,
3741 jni_CallStaticObjectMethodA,
3742 jni_CallStaticBooleanMethod,
3743 jni_CallStaticBooleanMethodV,
3744 jni_CallStaticBooleanMethodA,
3745 jni_CallStaticByteMethod,
3746 jni_CallStaticByteMethodV,
3747 jni_CallStaticByteMethodA,
3748 jni_CallStaticCharMethod,
3749 jni_CallStaticCharMethodV,
3750 jni_CallStaticCharMethodA,
3751 jni_CallStaticShortMethod,
3752 jni_CallStaticShortMethodV,
3753 jni_CallStaticShortMethodA,
3754 jni_CallStaticIntMethod,
3755 jni_CallStaticIntMethodV,
3756 jni_CallStaticIntMethodA,
3757 jni_CallStaticLongMethod,
3758 jni_CallStaticLongMethodV,
3759 jni_CallStaticLongMethodA,
3760 jni_CallStaticFloatMethod,
3761 jni_CallStaticFloatMethodV,
3762 jni_CallStaticFloatMethodA,
3763 jni_CallStaticDoubleMethod,
3764 jni_CallStaticDoubleMethodV,
3765 jni_CallStaticDoubleMethodA,
3766 jni_CallStaticVoidMethod,
3767 jni_CallStaticVoidMethodV,
3768 jni_CallStaticVoidMethodA,
3769
3770 jni_GetStaticFieldID,
3771
3772 jni_GetStaticObjectField,
3773 jni_GetStaticBooleanField,
3774 jni_GetStaticByteField,
3775 jni_GetStaticCharField,
3776 jni_GetStaticShortField,
3777 jni_GetStaticIntField,
3778 jni_GetStaticLongField,
3779 jni_GetStaticFloatField,
3780 jni_GetStaticDoubleField,
3781
3782 jni_SetStaticObjectField,
3783 jni_SetStaticBooleanField,
3784 jni_SetStaticByteField,
3785 jni_SetStaticCharField,
3786 jni_SetStaticShortField,
3787 jni_SetStaticIntField,
3788 jni_SetStaticLongField,
3789 jni_SetStaticFloatField,
3790 jni_SetStaticDoubleField,
3791
3792 jni_NewString,
3793 jni_GetStringLength,
3794 jni_GetStringChars,
3795 jni_ReleaseStringChars,
3796
3797 jni_NewStringUTF,
3798 jni_GetStringUTFLength,
3799 jni_GetStringUTFChars,
3800 jni_ReleaseStringUTFChars,
3801
3802 jni_GetArrayLength,
3803
3804 jni_NewObjectArray,
3805 jni_GetObjectArrayElement,
3806 jni_SetObjectArrayElement,
3807
3808 jni_NewBooleanArray,
3809 jni_NewByteArray,
3810 jni_NewCharArray,
3811 jni_NewShortArray,
3812 jni_NewIntArray,
3813 jni_NewLongArray,
3814 jni_NewFloatArray,
3815 jni_NewDoubleArray,
3816
3817 jni_GetBooleanArrayElements,
3818 jni_GetByteArrayElements,
3819 jni_GetCharArrayElements,
3820 jni_GetShortArrayElements,
3821 jni_GetIntArrayElements,
3822 jni_GetLongArrayElements,
3823 jni_GetFloatArrayElements,
3824 jni_GetDoubleArrayElements,
3825
3826 jni_ReleaseBooleanArrayElements,
3827 jni_ReleaseByteArrayElements,
3828 jni_ReleaseCharArrayElements,
3829 jni_ReleaseShortArrayElements,
3830 jni_ReleaseIntArrayElements,
3831 jni_ReleaseLongArrayElements,
3832 jni_ReleaseFloatArrayElements,
3833 jni_ReleaseDoubleArrayElements,
3834
3835 jni_GetBooleanArrayRegion,
3836 jni_GetByteArrayRegion,
3837 jni_GetCharArrayRegion,
3838 jni_GetShortArrayRegion,
3839 jni_GetIntArrayRegion,
3840 jni_GetLongArrayRegion,
3841 jni_GetFloatArrayRegion,
3842 jni_GetDoubleArrayRegion,
3843
3844 jni_SetBooleanArrayRegion,
3845 jni_SetByteArrayRegion,
3846 jni_SetCharArrayRegion,
3847 jni_SetShortArrayRegion,
3848 jni_SetIntArrayRegion,
3849 jni_SetLongArrayRegion,
3850 jni_SetFloatArrayRegion,
3851 jni_SetDoubleArrayRegion,
3852
3853 jni_RegisterNatives,
3854 jni_UnregisterNatives,
3855
3856 jni_MonitorEnter,
3857 jni_MonitorExit,
3858
3859 jni_GetJavaVM,
3860
3861 jni_GetStringRegion,
3862 jni_GetStringUTFRegion,
3863
3864 jni_GetPrimitiveArrayCritical,
3865 jni_ReleasePrimitiveArrayCritical,
3866
3867 jni_GetStringCritical,
3868 jni_ReleaseStringCritical,
3869
3870 jni_NewWeakGlobalRef,
3871 jni_DeleteWeakGlobalRef,
3872
3873 jni_ExceptionCheck,
3874
3875 jni_NewDirectByteBuffer,
3876 jni_GetDirectBufferAddress,
3877 jni_GetDirectBufferCapacity,
3878
3879 // New 1_6 features
3880
3881 jni_GetObjectRefType,
3882
3883 // Module features
3884
3885 jni_GetModule,
3886
3887 // Flattened arrays features
3888
3889 jni_GetFlattenedArrayElements,
3890 jni_ReleaseFlattenedArrayElements,
3891 jni_GetFlattenedArrayElementClass,
3892 jni_GetFlattenedArrayElementSize,
3893 jni_GetFieldOffsetInFlattenedLayout
3894 };
3895
3896
3897 // For jvmti use to modify jni function table.
3898 // Java threads in native contiues to run until it is transitioned
3899 // to VM at safepoint. Before the transition or before it is blocked
3900 // for safepoint it may access jni function table. VM could crash if
3901 // any java thread access the jni function table in the middle of memcpy.
3902 // To avoid this each function pointers are copied automically.
3903 void copy_jni_function_table(const struct JNINativeInterface_ *new_jni_NativeInterface) {
3904 assert(SafepointSynchronize::is_at_safepoint(), "must be at safepoint");
3905 intptr_t *a = (intptr_t *) jni_functions();
3906 intptr_t *b = (intptr_t *) new_jni_NativeInterface;
3907 for (uint i=0; i < sizeof(struct JNINativeInterface_)/sizeof(void *); i++) {
3908 Atomic::store(a++, *b++);
3909 }
3910 }
3911
3912 void quicken_jni_functions() {
3913 // Replace Get<Primitive>Field with fast versions
3914 if (UseFastJNIAccessors && !VerifyJNIFields && !CountJNICalls && !CheckJNICalls) {
3915 address func;
3916 func = JNI_FastGetField::generate_fast_get_boolean_field();
3917 if (func != (address)-1) {
3918 jni_NativeInterface.GetBooleanField = (GetBooleanField_t)func;
3919 }
3920 func = JNI_FastGetField::generate_fast_get_byte_field();
3921 if (func != (address)-1) {
3922 jni_NativeInterface.GetByteField = (GetByteField_t)func;
3923 }
3924 func = JNI_FastGetField::generate_fast_get_char_field();
3925 if (func != (address)-1) {
3926 jni_NativeInterface.GetCharField = (GetCharField_t)func;
3927 }
3928 func = JNI_FastGetField::generate_fast_get_short_field();
3929 if (func != (address)-1) {
3930 jni_NativeInterface.GetShortField = (GetShortField_t)func;
3931 }
3932 func = JNI_FastGetField::generate_fast_get_int_field();
3933 if (func != (address)-1) {
3934 jni_NativeInterface.GetIntField = (GetIntField_t)func;
3935 }
3936 func = JNI_FastGetField::generate_fast_get_long_field();
3937 if (func != (address)-1) {
3938 jni_NativeInterface.GetLongField = (GetLongField_t)func;
3939 }
3940 func = JNI_FastGetField::generate_fast_get_float_field();
3941 if (func != (address)-1) {
3942 jni_NativeInterface.GetFloatField = (GetFloatField_t)func;
3943 }
3944 func = JNI_FastGetField::generate_fast_get_double_field();
3945 if (func != (address)-1) {
3946 jni_NativeInterface.GetDoubleField = (GetDoubleField_t)func;
3947 }
3948 }
3949 }
3950
3951 // Returns the function structure
3952 struct JNINativeInterface_* jni_functions() {
3953 #if INCLUDE_JNI_CHECK
3954 if (CheckJNICalls) return jni_functions_check();
3955 #endif // INCLUDE_JNI_CHECK
3956 return &jni_NativeInterface;
3957 }
3958
3959 // Returns the function structure
3960 struct JNINativeInterface_* jni_functions_nocheck() {
3961 return &jni_NativeInterface;
3962 }
3963
3964 static void post_thread_start_event(const JavaThread* jt) {
3965 assert(jt != NULL, "invariant");
3966 EventThreadStart event;
3967 if (event.should_commit()) {
3968 event.set_thread(JFR_THREAD_ID(jt));
3969 event.commit();
3970 }
3971 }
3972
3973 // Invocation API
3974
3975
3976 // Forward declaration
3977 extern const struct JNIInvokeInterface_ jni_InvokeInterface;
3978
3979 // Global invocation API vars
3980 volatile int vm_created = 0;
3981 // Indicate whether it is safe to recreate VM
3982 volatile int safe_to_recreate_vm = 1;
3983 struct JavaVM_ main_vm = {&jni_InvokeInterface};
3984
3985
3986 #define JAVASTACKSIZE (400 * 1024) /* Default size of a thread java stack */
3987 enum { VERIFY_NONE, VERIFY_REMOTE, VERIFY_ALL };
3988
3989 DT_RETURN_MARK_DECL(GetDefaultJavaVMInitArgs, jint
3990 , HOTSPOT_JNI_GETDEFAULTJAVAVMINITARGS_RETURN(_ret_ref));
3991
3992 _JNI_IMPORT_OR_EXPORT_ jint JNICALL JNI_GetDefaultJavaVMInitArgs(void *args_) {
3993 HOTSPOT_JNI_GETDEFAULTJAVAVMINITARGS_ENTRY(args_);
3994 JDK1_1InitArgs *args = (JDK1_1InitArgs *)args_;
3995 jint ret = JNI_ERR;
3996 DT_RETURN_MARK(GetDefaultJavaVMInitArgs, jint, (const jint&)ret);
3997
3998 if (Threads::is_supported_jni_version(args->version)) {
3999 ret = JNI_OK;
4000 }
4001 // 1.1 style no longer supported in hotspot.
4002 // According the JNI spec, we should update args->version on return.
4003 // We also use the structure to communicate with launcher about default
4004 // stack size.
4005 if (args->version == JNI_VERSION_1_1) {
4006 args->version = JNI_VERSION_1_2;
4007 // javaStackSize is int in arguments structure
4008 assert(jlong(ThreadStackSize) * K < INT_MAX, "integer overflow");
4009 args->javaStackSize = (jint)(ThreadStackSize * K);
4010 }
4011 return ret;
4012 }
4013
4014 DT_RETURN_MARK_DECL(CreateJavaVM, jint
4015 , HOTSPOT_JNI_CREATEJAVAVM_RETURN(_ret_ref));
4016
4017 static jint JNI_CreateJavaVM_inner(JavaVM **vm, void **penv, void *args) {
4018 HOTSPOT_JNI_CREATEJAVAVM_ENTRY((void **) vm, penv, args);
4019
4020 jint result = JNI_ERR;
4021 DT_RETURN_MARK(CreateJavaVM, jint, (const jint&)result);
4022
4023 // We're about to use Atomic::xchg for synchronization. Some Zero
4024 // platforms use the GCC builtin __sync_lock_test_and_set for this,
4025 // but __sync_lock_test_and_set is not guaranteed to do what we want
4026 // on all architectures. So we check it works before relying on it.
4027 #if defined(ZERO) && defined(ASSERT)
4028 {
4029 jint a = 0xcafebabe;
4030 jint b = Atomic::xchg(&a, (jint) 0xdeadbeef);
4031 void *c = &a;
4032 void *d = Atomic::xchg(&c, &b);
4033 assert(a == (jint) 0xdeadbeef && b == (jint) 0xcafebabe, "Atomic::xchg() works");
4034 assert(c == &b && d == &a, "Atomic::xchg() works");
4035 }
4036 #endif // ZERO && ASSERT
4037
4038 // At the moment it's only possible to have one Java VM,
4039 // since some of the runtime state is in global variables.
4040
4041 // We cannot use our mutex locks here, since they only work on
4042 // Threads. We do an atomic compare and exchange to ensure only
4043 // one thread can call this method at a time
4044
4045 // We use Atomic::xchg rather than Atomic::add/dec since on some platforms
4046 // the add/dec implementations are dependent on whether we are running
4047 // on a multiprocessor Atomic::xchg does not have this problem.
4048 if (Atomic::xchg(&vm_created, 1) == 1) {
4049 return JNI_EEXIST; // already created, or create attempt in progress
4050 }
4051 if (Atomic::xchg(&safe_to_recreate_vm, 0) == 0) {
4052 return JNI_ERR; // someone tried and failed and retry not allowed.
4053 }
4054
4055 assert(vm_created == 1, "vm_created is true during the creation");
4056
4057 /**
4058 * Certain errors during initialization are recoverable and do not
4059 * prevent this method from being called again at a later time
4060 * (perhaps with different arguments). However, at a certain
4061 * point during initialization if an error occurs we cannot allow
4062 * this function to be called again (or it will crash). In those
4063 * situations, the 'canTryAgain' flag is set to false, which atomically
4064 * sets safe_to_recreate_vm to 1, such that any new call to
4065 * JNI_CreateJavaVM will immediately fail using the above logic.
4066 */
4067 bool can_try_again = true;
4068
4069 result = Threads::create_vm((JavaVMInitArgs*) args, &can_try_again);
4070 if (result == JNI_OK) {
4071 JavaThread *thread = JavaThread::current();
4072 assert(!thread->has_pending_exception(), "should have returned not OK");
4073 /* thread is thread_in_vm here */
4074 *vm = (JavaVM *)(&main_vm);
4075 *(JNIEnv**)penv = thread->jni_environment();
4076
4077 #if INCLUDE_JVMCI
4078 if (EnableJVMCI) {
4079 if (UseJVMCICompiler) {
4080 // JVMCI is initialized on a CompilerThread
4081 if (BootstrapJVMCI) {
4082 JavaThread* THREAD = thread;
4083 JVMCICompiler* compiler = JVMCICompiler::instance(true, CATCH);
4084 compiler->bootstrap(THREAD);
4085 if (HAS_PENDING_EXCEPTION) {
4086 HandleMark hm;
4087 vm_exit_during_initialization(Handle(THREAD, PENDING_EXCEPTION));
4088 }
4089 }
4090 }
4091 }
4092 #endif
4093
4094 // Notify JVMTI
4095 if (JvmtiExport::should_post_thread_life()) {
4096 JvmtiExport::post_thread_start(thread);
4097 }
4098
4099 post_thread_start_event(thread);
4100
4101 #ifndef PRODUCT
4102 if (ReplayCompiles) ciReplay::replay(thread);
4103
4104 // Some platforms (like Win*) need a wrapper around these test
4105 // functions in order to properly handle error conditions.
4106 VMError::test_error_handler();
4107 #endif
4108
4109 // Since this is not a JVM_ENTRY we have to set the thread state manually before leaving.
4110 ThreadStateTransition::transition(thread, _thread_in_vm, _thread_in_native);
4111 } else {
4112 // If create_vm exits because of a pending exception, exit with that
4113 // exception. In the future when we figure out how to reclaim memory,
4114 // we may be able to exit with JNI_ERR and allow the calling application
4115 // to continue.
4116 if (Universe::is_fully_initialized()) {
4117 // otherwise no pending exception possible - VM will already have aborted
4118 JavaThread* THREAD = JavaThread::current();
4119 if (HAS_PENDING_EXCEPTION) {
4120 HandleMark hm;
4121 vm_exit_during_initialization(Handle(THREAD, PENDING_EXCEPTION));
4122 }
4123 }
4124
4125 if (can_try_again) {
4126 // reset safe_to_recreate_vm to 1 so that retrial would be possible
4127 safe_to_recreate_vm = 1;
4128 }
4129
4130 // Creation failed. We must reset vm_created
4131 *vm = 0;
4132 *(JNIEnv**)penv = 0;
4133 // reset vm_created last to avoid race condition. Use OrderAccess to
4134 // control both compiler and architectural-based reordering.
4135 Atomic::release_store(&vm_created, 0);
4136 }
4137
4138 // Flush stdout and stderr before exit.
4139 fflush(stdout);
4140 fflush(stderr);
4141
4142 return result;
4143
4144 }
4145
4146 _JNI_IMPORT_OR_EXPORT_ jint JNICALL JNI_CreateJavaVM(JavaVM **vm, void **penv, void *args) {
4147 jint result = JNI_ERR;
4148 // On Windows, let CreateJavaVM run with SEH protection
4149 #ifdef _WIN32
4150 __try {
4151 #endif
4152 result = JNI_CreateJavaVM_inner(vm, penv, args);
4153 #ifdef _WIN32
4154 } __except(topLevelExceptionFilter((_EXCEPTION_POINTERS*)_exception_info())) {
4155 // Nothing to do.
4156 }
4157 #endif
4158 return result;
4159 }
4160
4161 _JNI_IMPORT_OR_EXPORT_ jint JNICALL JNI_GetCreatedJavaVMs(JavaVM **vm_buf, jsize bufLen, jsize *numVMs) {
4162 // See bug 4367188, the wrapper can sometimes cause VM crashes
4163 // JNIWrapper("GetCreatedJavaVMs");
4164
4165 HOTSPOT_JNI_GETCREATEDJAVAVMS_ENTRY((void **) vm_buf, bufLen, (uintptr_t *) numVMs);
4166
4167 if (vm_created == 1) {
4168 if (numVMs != NULL) *numVMs = 1;
4169 if (bufLen > 0) *vm_buf = (JavaVM *)(&main_vm);
4170 } else {
4171 if (numVMs != NULL) *numVMs = 0;
4172 }
4173 HOTSPOT_JNI_GETCREATEDJAVAVMS_RETURN(JNI_OK);
4174 return JNI_OK;
4175 }
4176
4177 extern "C" {
4178
4179 DT_RETURN_MARK_DECL(DestroyJavaVM, jint
4180 , HOTSPOT_JNI_DESTROYJAVAVM_RETURN(_ret_ref));
4181
4182 static jint JNICALL jni_DestroyJavaVM_inner(JavaVM *vm) {
4183 HOTSPOT_JNI_DESTROYJAVAVM_ENTRY(vm);
4184 jint res = JNI_ERR;
4185 DT_RETURN_MARK(DestroyJavaVM, jint, (const jint&)res);
4186
4187 if (vm_created == 0) {
4188 res = JNI_ERR;
4189 return res;
4190 }
4191
4192 JNIWrapper("DestroyJavaVM");
4193 JNIEnv *env;
4194 JavaVMAttachArgs destroyargs;
4195 destroyargs.version = CurrentVersion;
4196 destroyargs.name = (char *)"DestroyJavaVM";
4197 destroyargs.group = NULL;
4198 res = vm->AttachCurrentThread((void **)&env, (void *)&destroyargs);
4199 if (res != JNI_OK) {
4200 return res;
4201 }
4202
4203 // Since this is not a JVM_ENTRY we have to set the thread state manually before entering.
4204 JavaThread* thread = JavaThread::current();
4205 ThreadStateTransition::transition_from_native(thread, _thread_in_vm);
4206 if (Threads::destroy_vm()) {
4207 // Should not change thread state, VM is gone
4208 vm_created = 0;
4209 res = JNI_OK;
4210 return res;
4211 } else {
4212 ThreadStateTransition::transition(thread, _thread_in_vm, _thread_in_native);
4213 res = JNI_ERR;
4214 return res;
4215 }
4216 }
4217
4218 jint JNICALL jni_DestroyJavaVM(JavaVM *vm) {
4219 jint result = JNI_ERR;
4220 // On Windows, we need SEH protection
4221 #ifdef _WIN32
4222 __try {
4223 #endif
4224 result = jni_DestroyJavaVM_inner(vm);
4225 #ifdef _WIN32
4226 } __except(topLevelExceptionFilter((_EXCEPTION_POINTERS*)_exception_info())) {
4227 // Nothing to do.
4228 }
4229 #endif
4230 return result;
4231 }
4232
4233 static jint attach_current_thread(JavaVM *vm, void **penv, void *_args, bool daemon) {
4234 JavaVMAttachArgs *args = (JavaVMAttachArgs *) _args;
4235
4236 // Check below commented out from JDK1.2fcs as well
4237 /*
4238 if (args && (args->version != JNI_VERSION_1_1 || args->version != JNI_VERSION_1_2)) {
4239 return JNI_EVERSION;
4240 }
4241 */
4242
4243 Thread* t = Thread::current_or_null();
4244 if (t != NULL) {
4245 // If the thread has been attached this operation is a no-op
4246 *(JNIEnv**)penv = ((JavaThread*) t)->jni_environment();
4247 return JNI_OK;
4248 }
4249
4250 // Create a thread and mark it as attaching so it will be skipped by the
4251 // ThreadsListEnumerator - see CR 6404306
4252 JavaThread* thread = new JavaThread(true);
4253
4254 // Set correct safepoint info. The thread is going to call into Java when
4255 // initializing the Java level thread object. Hence, the correct state must
4256 // be set in order for the Safepoint code to deal with it correctly.
4257 thread->set_thread_state(_thread_in_vm);
4258 thread->record_stack_base_and_size();
4259 thread->register_thread_stack_with_NMT();
4260 thread->initialize_thread_current();
4261
4262 if (!os::create_attached_thread(thread)) {
4263 thread->smr_delete();
4264 return JNI_ERR;
4265 }
4266 // Enable stack overflow checks
4267 thread->create_stack_guard_pages();
4268
4269 thread->initialize_tlab();
4270
4271 thread->cache_global_variables();
4272
4273 // This thread will not do a safepoint check, since it has
4274 // not been added to the Thread list yet.
4275 { MutexLocker ml(Threads_lock);
4276 // This must be inside this lock in order to get FullGCALot to work properly, i.e., to
4277 // avoid this thread trying to do a GC before it is added to the thread-list
4278 thread->set_active_handles(JNIHandleBlock::allocate_block());
4279 Threads::add(thread, daemon);
4280 }
4281 // Create thread group and name info from attach arguments
4282 oop group = NULL;
4283 char* thread_name = NULL;
4284 if (args != NULL && Threads::is_supported_jni_version(args->version)) {
4285 group = JNIHandles::resolve(args->group);
4286 thread_name = args->name; // may be NULL
4287 }
4288 if (group == NULL) group = Universe::main_thread_group();
4289
4290 // Create Java level thread object and attach it to this thread
4291 bool attach_failed = false;
4292 {
4293 EXCEPTION_MARK;
4294 HandleMark hm(THREAD);
4295 Handle thread_group(THREAD, group);
4296 thread->allocate_threadObj(thread_group, thread_name, daemon, THREAD);
4297 if (HAS_PENDING_EXCEPTION) {
4298 CLEAR_PENDING_EXCEPTION;
4299 // cleanup outside the handle mark.
4300 attach_failed = true;
4301 }
4302 }
4303
4304 if (attach_failed) {
4305 // Added missing cleanup
4306 thread->cleanup_failed_attach_current_thread(daemon);
4307 return JNI_ERR;
4308 }
4309
4310 // mark the thread as no longer attaching
4311 // this uses a fence to push the change through so we don't have
4312 // to regrab the threads_lock
4313 thread->set_done_attaching_via_jni();
4314
4315 // Set java thread status.
4316 java_lang_Thread::set_thread_status(thread->threadObj(),
4317 java_lang_Thread::RUNNABLE);
4318
4319 // Notify the debugger
4320 if (JvmtiExport::should_post_thread_life()) {
4321 JvmtiExport::post_thread_start(thread);
4322 }
4323
4324 post_thread_start_event(thread);
4325
4326 *(JNIEnv**)penv = thread->jni_environment();
4327
4328 // Now leaving the VM, so change thread_state. This is normally automatically taken care
4329 // of in the JVM_ENTRY. But in this situation we have to do it manually. Notice, that by
4330 // using ThreadStateTransition::transition, we do a callback to the safepoint code if
4331 // needed.
4332
4333 ThreadStateTransition::transition(thread, _thread_in_vm, _thread_in_native);
4334
4335 // Perform any platform dependent FPU setup
4336 os::setup_fpu();
4337
4338 return JNI_OK;
4339 }
4340
4341
4342 jint JNICALL jni_AttachCurrentThread(JavaVM *vm, void **penv, void *_args) {
4343 HOTSPOT_JNI_ATTACHCURRENTTHREAD_ENTRY(vm, penv, _args);
4344 if (vm_created == 0) {
4345 HOTSPOT_JNI_ATTACHCURRENTTHREAD_RETURN((uint32_t) JNI_ERR);
4346 return JNI_ERR;
4347 }
4348
4349 JNIWrapper("AttachCurrentThread");
4350 jint ret = attach_current_thread(vm, penv, _args, false);
4351 HOTSPOT_JNI_ATTACHCURRENTTHREAD_RETURN(ret);
4352 return ret;
4353 }
4354
4355
4356 jint JNICALL jni_DetachCurrentThread(JavaVM *vm) {
4357 HOTSPOT_JNI_DETACHCURRENTTHREAD_ENTRY(vm);
4358
4359 JNIWrapper("DetachCurrentThread");
4360
4361 // If the thread has already been detached the operation is a no-op
4362 if (Thread::current_or_null() == NULL) {
4363 HOTSPOT_JNI_DETACHCURRENTTHREAD_RETURN(JNI_OK);
4364 return JNI_OK;
4365 }
4366
4367 VM_Exit::block_if_vm_exited();
4368
4369 JavaThread* thread = JavaThread::current();
4370 if (thread->has_last_Java_frame()) {
4371 HOTSPOT_JNI_DETACHCURRENTTHREAD_RETURN((uint32_t) JNI_ERR);
4372 // Can't detach a thread that's running java, that can't work.
4373 return JNI_ERR;
4374 }
4375
4376 // Safepoint support. Have to do call-back to safepoint code, if in the
4377 // middle of a safepoint operation
4378 ThreadStateTransition::transition_from_native(thread, _thread_in_vm);
4379
4380 // XXX: Note that JavaThread::exit() call below removes the guards on the
4381 // stack pages set up via enable_stack_{red,yellow}_zone() calls
4382 // above in jni_AttachCurrentThread. Unfortunately, while the setting
4383 // of the guards is visible in jni_AttachCurrentThread above,
4384 // the removal of the guards is buried below in JavaThread::exit()
4385 // here. The abstraction should be more symmetrically either exposed
4386 // or hidden (e.g. it could probably be hidden in the same
4387 // (platform-dependent) methods where we do alternate stack
4388 // maintenance work?)
4389 thread->exit(false, JavaThread::jni_detach);
4390 thread->smr_delete();
4391
4392 HOTSPOT_JNI_DETACHCURRENTTHREAD_RETURN(JNI_OK);
4393 return JNI_OK;
4394 }
4395
4396 DT_RETURN_MARK_DECL(GetEnv, jint
4397 , HOTSPOT_JNI_GETENV_RETURN(_ret_ref));
4398
4399 jint JNICALL jni_GetEnv(JavaVM *vm, void **penv, jint version) {
4400 HOTSPOT_JNI_GETENV_ENTRY(vm, penv, version);
4401 jint ret = JNI_ERR;
4402 DT_RETURN_MARK(GetEnv, jint, (const jint&)ret);
4403
4404 if (vm_created == 0) {
4405 *penv = NULL;
4406 ret = JNI_EDETACHED;
4407 return ret;
4408 }
4409
4410 if (JniExportedInterface::GetExportedInterface(vm, penv, version, &ret)) {
4411 return ret;
4412 }
4413
4414 #ifndef JVMPI_VERSION_1
4415 // need these in order to be polite about older agents
4416 #define JVMPI_VERSION_1 ((jint)0x10000001)
4417 #define JVMPI_VERSION_1_1 ((jint)0x10000002)
4418 #define JVMPI_VERSION_1_2 ((jint)0x10000003)
4419 #endif // !JVMPI_VERSION_1
4420
4421 Thread* thread = Thread::current_or_null();
4422 if (thread != NULL && thread->is_Java_thread()) {
4423 if (Threads::is_supported_jni_version_including_1_1(version)) {
4424 *(JNIEnv**)penv = ((JavaThread*) thread)->jni_environment();
4425 ret = JNI_OK;
4426 return ret;
4427
4428 } else if (version == JVMPI_VERSION_1 ||
4429 version == JVMPI_VERSION_1_1 ||
4430 version == JVMPI_VERSION_1_2) {
4431 tty->print_cr("ERROR: JVMPI, an experimental interface, is no longer supported.");
4432 tty->print_cr("Please use the supported interface: the JVM Tool Interface (JVM TI).");
4433 ret = JNI_EVERSION;
4434 return ret;
4435 } else if (JvmtiExport::is_jvmdi_version(version)) {
4436 tty->print_cr("FATAL ERROR: JVMDI is no longer supported.");
4437 tty->print_cr("Please use the supported interface: the JVM Tool Interface (JVM TI).");
4438 ret = JNI_EVERSION;
4439 return ret;
4440 } else {
4441 *penv = NULL;
4442 ret = JNI_EVERSION;
4443 return ret;
4444 }
4445 } else {
4446 *penv = NULL;
4447 ret = JNI_EDETACHED;
4448 return ret;
4449 }
4450 }
4451
4452
4453 jint JNICALL jni_AttachCurrentThreadAsDaemon(JavaVM *vm, void **penv, void *_args) {
4454 HOTSPOT_JNI_ATTACHCURRENTTHREADASDAEMON_ENTRY(vm, penv, _args);
4455 if (vm_created == 0) {
4456 HOTSPOT_JNI_ATTACHCURRENTTHREADASDAEMON_RETURN((uint32_t) JNI_ERR);
4457 return JNI_ERR;
4458 }
4459
4460 JNIWrapper("AttachCurrentThreadAsDaemon");
4461 jint ret = attach_current_thread(vm, penv, _args, true);
4462 HOTSPOT_JNI_ATTACHCURRENTTHREADASDAEMON_RETURN(ret);
4463 return ret;
4464 }
4465
4466
4467 } // End extern "C"
4468
4469 const struct JNIInvokeInterface_ jni_InvokeInterface = {
4470 NULL,
4471 NULL,
4472 NULL,
4473
4474 jni_DestroyJavaVM,
4475 jni_AttachCurrentThread,
4476 jni_DetachCurrentThread,
4477 jni_GetEnv,
4478 jni_AttachCurrentThreadAsDaemon
4479 };