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