1 /*
2 * Copyright (c) 1997, 2022, Oracle and/or its affiliates. All rights reserved.
3 * Copyright (c) 2012 Red Hat, Inc.
4 * Copyright (c) 2021, Azul Systems, Inc. All rights reserved.
5 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
6 *
7 * This code is free software; you can redistribute it and/or modify it
8 * under the terms of the GNU General Public License version 2 only, as
9 * published by the Free Software Foundation.
10 *
11 * This code is distributed in the hope that it will be useful, but WITHOUT
12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
14 * version 2 for more details (a copy is included in the LICENSE file that
15 * accompanied this code).
16 *
17 * You should have received a copy of the GNU General Public License version
18 * 2 along with this work; if not, write to the Free Software Foundation,
19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20 *
21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
22 * or visit www.oracle.com if you need additional information or have any
23 * questions.
24 *
25 */
26
27 #include "precompiled.hpp"
28 #include "ci/ciReplay.hpp"
29 #include "classfile/altHashing.hpp"
30 #include "classfile/classFileStream.hpp"
31 #include "classfile/classLoader.hpp"
32 #include "classfile/classLoadInfo.hpp"
33 #include "classfile/javaClasses.hpp"
34 #include "classfile/javaClasses.inline.hpp"
35 #include "classfile/javaThreadStatus.hpp"
36 #include "classfile/moduleEntry.hpp"
37 #include "classfile/modules.hpp"
38 #include "classfile/symbolTable.hpp"
39 #include "classfile/systemDictionary.hpp"
40 #include "classfile/vmClasses.hpp"
41 #include "classfile/vmSymbols.hpp"
42 #include "compiler/compiler_globals.hpp"
43 #include "gc/shared/collectedHeap.hpp"
44 #include "gc/shared/gcLocker.inline.hpp"
45 #include "gc/shared/stringdedup/stringDedup.hpp"
46 #include "interpreter/linkResolver.hpp"
47 #include "jfr/jfrEvents.hpp"
48 #include "jfr/support/jfrThreadId.hpp"
49 #include "jni.h"
50 #include "jvm.h"
51 #include "logging/log.hpp"
52 #include "memory/allocation.hpp"
53 #include "memory/allocation.inline.hpp"
54 #include "memory/oopFactory.hpp"
55 #include "memory/resourceArea.hpp"
56 #include "memory/universe.hpp"
57 #include "oops/access.inline.hpp"
58 #include "oops/arrayOop.hpp"
59 #include "oops/flatArrayOop.inline.hpp"
60 #include "oops/inlineKlass.inline.hpp"
61 #include "oops/instanceKlass.inline.hpp"
62 #include "oops/instanceOop.hpp"
63 #include "oops/klass.inline.hpp"
64 #include "oops/markWord.hpp"
65 #include "oops/method.hpp"
66 #include "oops/objArrayKlass.hpp"
67 #include "oops/objArrayOop.inline.hpp"
68 #include "oops/oop.inline.hpp"
69 #include "oops/symbol.hpp"
70 #include "oops/typeArrayKlass.hpp"
71 #include "oops/typeArrayOop.inline.hpp"
72 #include "prims/jniCheck.hpp"
73 #include "prims/jniExport.hpp"
74 #include "prims/jniFastGetField.hpp"
75 #include "prims/jvm_misc.hpp"
76 #include "prims/jvmtiExport.hpp"
77 #include "prims/jvmtiThreadState.hpp"
78 #include "runtime/arguments.hpp"
79 #include "runtime/atomic.hpp"
80 #include "runtime/fieldDescriptor.inline.hpp"
81 #include "runtime/handles.inline.hpp"
82 #include "runtime/interfaceSupport.inline.hpp"
83 #include "runtime/java.hpp"
84 #include "runtime/javaCalls.hpp"
85 #include "runtime/javaThread.inline.hpp"
86 #include "runtime/jfieldIDWorkaround.hpp"
87 #include "runtime/jniHandles.inline.hpp"
88 #include "runtime/reflection.hpp"
89 #include "runtime/safepointVerifiers.hpp"
90 #include "runtime/sharedRuntime.hpp"
91 #include "runtime/signature.hpp"
92 #include "runtime/synchronizer.hpp"
93 #include "runtime/thread.inline.hpp"
94 #include "runtime/vmOperations.hpp"
95 #include "services/memTracker.hpp"
96 #include "services/runtimeService.hpp"
97 #include "utilities/defaultStream.hpp"
98 #include "utilities/dtrace.hpp"
99 #include "utilities/events.hpp"
100 #include "utilities/macros.hpp"
101 #include "utilities/vmError.hpp"
102 #if INCLUDE_JVMCI
103 #include "jvmci/jvmciCompiler.hpp"
104 #endif
105
106 static jint CurrentVersion = JNI_VERSION_20;
107
108 #if defined(_WIN32) && !defined(USE_VECTORED_EXCEPTION_HANDLING)
109 extern LONG WINAPI topLevelExceptionFilter(_EXCEPTION_POINTERS* );
110 #endif
111
112 // The DT_RETURN_MARK macros create a scoped object to fire the dtrace
113 // '-return' probe regardless of the return path is taken out of the function.
114 // Methods that have multiple return paths use this to avoid having to
115 // instrument each return path. Methods that use CHECK or THROW must use this
116 // since those macros can cause an immediate uninstrumented return.
117 //
118 // In order to get the return value, a reference to the variable containing
119 // the return value must be passed to the constructor of the object, and
120 // the return value must be set before return (since the mark object has
121 // a reference to it).
122 //
123 // Example:
124 // DT_RETURN_MARK_DECL(SomeFunc, int);
125 // JNI_ENTRY(int, SomeFunc, ...)
126 // int return_value = 0;
127 // DT_RETURN_MARK(SomeFunc, int, (const int&)return_value);
128 // foo(CHECK_0)
129 // return_value = 5;
130 // return return_value;
131 // JNI_END
132 #define DT_RETURN_MARK_DECL(name, type, probe) \
133 DTRACE_ONLY( \
134 class DTraceReturnProbeMark_##name { \
135 public: \
136 const type& _ret_ref; \
137 DTraceReturnProbeMark_##name(const type& v) : _ret_ref(v) {} \
138 ~DTraceReturnProbeMark_##name() { \
139 probe; \
140 } \
141 } \
142 )
143 // Void functions are simpler since there's no return value
144 #define DT_VOID_RETURN_MARK_DECL(name, probe) \
145 DTRACE_ONLY( \
146 class DTraceReturnProbeMark_##name { \
147 public: \
148 ~DTraceReturnProbeMark_##name() { \
149 probe; \
150 } \
151 } \
152 )
153
154 // Place these macros in the function to mark the return. Non-void
155 // functions need the type and address of the return value.
156 #define DT_RETURN_MARK(name, type, ref) \
157 DTRACE_ONLY( DTraceReturnProbeMark_##name dtrace_return_mark(ref) )
158 #define DT_VOID_RETURN_MARK(name) \
159 DTRACE_ONLY( DTraceReturnProbeMark_##name dtrace_return_mark )
160
161
162 // Use these to select distinct code for floating-point vs. non-floating point
163 // situations. Used from within common macros where we need slightly
164 // different behavior for Float/Double
165 #define FP_SELECT_Boolean(intcode, fpcode) intcode
166 #define FP_SELECT_Byte(intcode, fpcode) intcode
167 #define FP_SELECT_Char(intcode, fpcode) intcode
168 #define FP_SELECT_Short(intcode, fpcode) intcode
169 #define FP_SELECT_Object(intcode, fpcode) intcode
170 #define FP_SELECT_Int(intcode, fpcode) intcode
171 #define FP_SELECT_Long(intcode, fpcode) intcode
172 #define FP_SELECT_Float(intcode, fpcode) fpcode
173 #define FP_SELECT_Double(intcode, fpcode) fpcode
174 #define FP_SELECT(TypeName, intcode, fpcode) \
175 FP_SELECT_##TypeName(intcode, fpcode)
176
177 // Choose DT_RETURN_MARK macros based on the type: float/double -> void
178 // (dtrace doesn't do FP yet)
179 #define DT_RETURN_MARK_DECL_FOR(TypeName, name, type, probe) \
180 FP_SELECT(TypeName, \
181 DT_RETURN_MARK_DECL(name, type, probe), DT_VOID_RETURN_MARK_DECL(name, probe) )
182 #define DT_RETURN_MARK_FOR(TypeName, name, type, ref) \
183 FP_SELECT(TypeName, \
184 DT_RETURN_MARK(name, type, ref), DT_VOID_RETURN_MARK(name) )
185
186
187 // out-of-line helpers for class jfieldIDWorkaround:
188
189 bool jfieldIDWorkaround::is_valid_jfieldID(Klass* k, jfieldID id) {
190 if (jfieldIDWorkaround::is_instance_jfieldID(k, id)) {
191 uintptr_t as_uint = (uintptr_t) id;
192 intptr_t offset = raw_instance_offset(id);
193 if (is_checked_jfieldID(id)) {
194 if (!klass_hash_ok(k, id)) {
195 return false;
196 }
197 }
198 return InstanceKlass::cast(k)->contains_field_offset(offset);
199 } else {
200 JNIid* result = (JNIid*) id;
201 #ifdef ASSERT
202 return result != NULL && result->is_static_field_id();
203 #else
204 return result != NULL;
205 #endif
206 }
207 }
208
209
210 intptr_t jfieldIDWorkaround::encode_klass_hash(Klass* k, intptr_t offset) {
211 if (offset <= small_offset_mask) {
212 Klass* field_klass = k;
213 Klass* super_klass = field_klass->super();
214 // With compressed oops the most super class with nonstatic fields would
215 // be the owner of fields embedded in the header.
216 while (InstanceKlass::cast(super_klass)->has_nonstatic_fields() &&
217 InstanceKlass::cast(super_klass)->contains_field_offset(offset)) {
218 field_klass = super_klass; // super contains the field also
219 super_klass = field_klass->super();
220 }
221 debug_only(NoSafepointVerifier nosafepoint;)
222 uintptr_t klass_hash = field_klass->identity_hash();
223 return ((klass_hash & klass_mask) << klass_shift) | checked_mask_in_place;
224 } else {
225 #if 0
226 #ifndef PRODUCT
227 {
228 ResourceMark rm;
229 warning("VerifyJNIFields: long offset %d in %s", offset, k->external_name());
230 }
231 #endif
232 #endif
233 return 0;
234 }
235 }
236
237 bool jfieldIDWorkaround::klass_hash_ok(Klass* k, jfieldID id) {
238 uintptr_t as_uint = (uintptr_t) id;
239 intptr_t klass_hash = (as_uint >> klass_shift) & klass_mask;
240 do {
241 debug_only(NoSafepointVerifier nosafepoint;)
242 // Could use a non-blocking query for identity_hash here...
243 if ((k->identity_hash() & klass_mask) == klass_hash)
244 return true;
245 k = k->super();
246 } while (k != NULL);
247 return false;
248 }
249
250 void jfieldIDWorkaround::verify_instance_jfieldID(Klass* k, jfieldID id) {
251 guarantee(jfieldIDWorkaround::is_instance_jfieldID(k, id), "must be an instance field" );
252 uintptr_t as_uint = (uintptr_t) id;
253 intptr_t offset = raw_instance_offset(id);
254 if (VerifyJNIFields) {
255 if (is_checked_jfieldID(id)) {
256 guarantee(klass_hash_ok(k, id),
257 "Bug in native code: jfieldID class must match object");
258 } else {
259 #if 0
260 #ifndef PRODUCT
261 if (Verbose) {
262 ResourceMark rm;
263 warning("VerifyJNIFields: unverified offset %d for %s", offset, k->external_name());
264 }
265 #endif
266 #endif
267 }
268 }
269 guarantee(InstanceKlass::cast(k)->contains_field_offset(offset),
270 "Bug in native code: jfieldID offset must address interior of object");
271 }
272
273 // Implementation of JNI entries
274
275 DT_RETURN_MARK_DECL(DefineClass, jclass
276 , HOTSPOT_JNI_DEFINECLASS_RETURN(_ret_ref));
277
278 JNI_ENTRY(jclass, jni_DefineClass(JNIEnv *env, const char *name, jobject loaderRef,
279 const jbyte *buf, jsize bufLen))
280 HOTSPOT_JNI_DEFINECLASS_ENTRY(
281 env, (char*) name, loaderRef, (char*) buf, bufLen);
282
283 jclass cls = NULL;
284 DT_RETURN_MARK(DefineClass, jclass, (const jclass&)cls);
285
286 // Class resolution will get the class name from the .class stream if the name is null.
287 TempNewSymbol class_name = name == NULL ? NULL :
288 SystemDictionary::class_name_symbol(name, vmSymbols::java_lang_NoClassDefFoundError(),
289 CHECK_NULL);
290
291 ResourceMark rm(THREAD);
292 ClassFileStream st((u1*)buf, bufLen, NULL, ClassFileStream::verify);
293 Handle class_loader (THREAD, JNIHandles::resolve(loaderRef));
294 Handle protection_domain;
295 ClassLoadInfo cl_info(protection_domain);
296 Klass* k = SystemDictionary::resolve_from_stream(&st, class_name,
297 class_loader,
298 cl_info,
299 CHECK_NULL);
300
301 if (log_is_enabled(Debug, class, resolve)) {
302 trace_class_resolution(k);
303 }
304
305 cls = (jclass)JNIHandles::make_local(THREAD, k->java_mirror());
306 return cls;
307 JNI_END
308
309
310
311 DT_RETURN_MARK_DECL(FindClass, jclass
312 , HOTSPOT_JNI_FINDCLASS_RETURN(_ret_ref));
313
314 JNI_ENTRY(jclass, jni_FindClass(JNIEnv *env, const char *name))
315 HOTSPOT_JNI_FINDCLASS_ENTRY(env, (char *)name);
316
317 jclass result = NULL;
318 DT_RETURN_MARK(FindClass, jclass, (const jclass&)result);
319
320 // This should be ClassNotFoundException imo.
321 TempNewSymbol class_name =
322 SystemDictionary::class_name_symbol(name, vmSymbols::java_lang_NoClassDefFoundError(),
323 CHECK_NULL);
324
325 //%note jni_3
326 Handle protection_domain;
327 // Find calling class
328 Klass* k = thread->security_get_caller_class(0);
329 // default to the system loader when no context
330 Handle loader(THREAD, SystemDictionary::java_system_loader());
331 if (k != NULL) {
332 // Special handling to make sure JNI_OnLoad and JNI_OnUnload are executed
333 // in the correct class context.
334 if (k->class_loader() == NULL &&
335 k->name() == vmSymbols::jdk_internal_loader_NativeLibraries()) {
336 JavaValue result(T_OBJECT);
337 JavaCalls::call_static(&result, k,
338 vmSymbols::getFromClass_name(),
339 vmSymbols::void_class_signature(),
340 CHECK_NULL);
341 // When invoked from JNI_OnLoad, NativeLibraries::getFromClass returns
342 // a non-NULL Class object. When invoked from JNI_OnUnload,
343 // it will return NULL to indicate no context.
344 oop mirror = result.get_oop();
345 if (mirror != NULL) {
346 Klass* fromClass = java_lang_Class::as_Klass(mirror);
347 loader = Handle(THREAD, fromClass->class_loader());
348 protection_domain = Handle(THREAD, fromClass->protection_domain());
349 }
350 } else {
351 loader = Handle(THREAD, k->class_loader());
352 }
353 }
354
355 result = find_class_from_class_loader(env, class_name, true, loader,
356 protection_domain, true, thread);
357
358 if (log_is_enabled(Debug, class, resolve) && result != NULL) {
359 trace_class_resolution(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(result)));
360 }
361
362 return result;
363 JNI_END
364
365 DT_RETURN_MARK_DECL(FromReflectedMethod, jmethodID
366 , HOTSPOT_JNI_FROMREFLECTEDMETHOD_RETURN((uintptr_t)_ret_ref));
367
368 JNI_ENTRY(jmethodID, jni_FromReflectedMethod(JNIEnv *env, jobject method))
369 HOTSPOT_JNI_FROMREFLECTEDMETHOD_ENTRY(env, method);
370
371 jmethodID ret = NULL;
372 DT_RETURN_MARK(FromReflectedMethod, jmethodID, (const jmethodID&)ret);
373
374 // method is a handle to a java.lang.reflect.Method object
375 oop reflected = JNIHandles::resolve_non_null(method);
376 oop mirror = NULL;
377 int slot = 0;
378
379 if (reflected->klass() == vmClasses::reflect_Constructor_klass()) {
380 mirror = java_lang_reflect_Constructor::clazz(reflected);
381 slot = java_lang_reflect_Constructor::slot(reflected);
382 } else {
383 assert(reflected->klass() == vmClasses::reflect_Method_klass(), "wrong type");
384 mirror = java_lang_reflect_Method::clazz(reflected);
385 slot = java_lang_reflect_Method::slot(reflected);
386 }
387 Klass* k1 = java_lang_Class::as_Klass(mirror);
388
389 // Make sure class is initialized before handing id's out to methods
390 k1->initialize(CHECK_NULL);
391 Method* m = InstanceKlass::cast(k1)->method_with_idnum(slot);
392 ret = m==NULL? NULL : m->jmethod_id(); // return NULL if reflected method deleted
393 return ret;
394 JNI_END
395
396 DT_RETURN_MARK_DECL(FromReflectedField, jfieldID
397 , HOTSPOT_JNI_FROMREFLECTEDFIELD_RETURN((uintptr_t)_ret_ref));
398
399 JNI_ENTRY(jfieldID, jni_FromReflectedField(JNIEnv *env, jobject field))
400 HOTSPOT_JNI_FROMREFLECTEDFIELD_ENTRY(env, field);
401
402 jfieldID ret = NULL;
403 DT_RETURN_MARK(FromReflectedField, jfieldID, (const jfieldID&)ret);
404
405 // field is a handle to a java.lang.reflect.Field object
406 oop reflected = JNIHandles::resolve_non_null(field);
407 oop mirror = java_lang_reflect_Field::clazz(reflected);
408 Klass* k1 = java_lang_Class::as_Klass(mirror);
409 int slot = java_lang_reflect_Field::slot(reflected);
410 int modifiers = java_lang_reflect_Field::modifiers(reflected);
411
412 // Make sure class is initialized before handing id's out to fields
413 k1->initialize(CHECK_NULL);
414
415 // First check if this is a static field
416 if (modifiers & JVM_ACC_STATIC) {
417 intptr_t offset = InstanceKlass::cast(k1)->field_offset( slot );
418 JNIid* id = InstanceKlass::cast(k1)->jni_id_for(offset);
419 assert(id != NULL, "corrupt Field object");
420 debug_only(id->set_is_static_field_id();)
421 // A jfieldID for a static field is a JNIid specifying the field holder and the offset within the Klass*
422 ret = jfieldIDWorkaround::to_static_jfieldID(id);
423 return ret;
424 }
425
426 // The slot is the index of the field description in the field-array
427 // The jfieldID is the offset of the field within the object
428 // It may also have hash bits for k, if VerifyJNIFields is turned on.
429 intptr_t offset = InstanceKlass::cast(k1)->field_offset( slot );
430 bool is_inlined = InstanceKlass::cast(k1)->field_is_inlined(slot);
431 assert(InstanceKlass::cast(k1)->contains_field_offset(offset), "stay within object");
432 ret = jfieldIDWorkaround::to_instance_jfieldID(k1, offset, is_inlined);
433 return ret;
434 JNI_END
435
436
437 DT_RETURN_MARK_DECL(ToReflectedMethod, jobject
438 , HOTSPOT_JNI_TOREFLECTEDMETHOD_RETURN(_ret_ref));
439
440 JNI_ENTRY(jobject, jni_ToReflectedMethod(JNIEnv *env, jclass cls, jmethodID method_id, jboolean isStatic))
441 HOTSPOT_JNI_TOREFLECTEDMETHOD_ENTRY(env, cls, (uintptr_t) method_id, isStatic);
442
443 jobject ret = NULL;
444 DT_RETURN_MARK(ToReflectedMethod, jobject, (const jobject&)ret);
445
446 methodHandle m (THREAD, Method::resolve_jmethod_id(method_id));
447 assert(m->is_static() == (isStatic != 0), "jni_ToReflectedMethod access flags doesn't match");
448 oop reflection_method;
449 if (m->is_object_constructor() || m->is_static_vnew_factory()) {
450 reflection_method = Reflection::new_constructor(m, CHECK_NULL);
451 } else {
452 reflection_method = Reflection::new_method(m, false, CHECK_NULL);
453 }
454 ret = JNIHandles::make_local(THREAD, reflection_method);
455 return ret;
456 JNI_END
457
458 DT_RETURN_MARK_DECL(GetSuperclass, jclass
459 , HOTSPOT_JNI_GETSUPERCLASS_RETURN(_ret_ref));
460
461 JNI_ENTRY(jclass, jni_GetSuperclass(JNIEnv *env, jclass sub))
462 HOTSPOT_JNI_GETSUPERCLASS_ENTRY(env, sub);
463
464 jclass obj = NULL;
465 DT_RETURN_MARK(GetSuperclass, jclass, (const jclass&)obj);
466
467 oop mirror = JNIHandles::resolve_non_null(sub);
468 // primitive classes return NULL
469 if (java_lang_Class::is_primitive(mirror)) return NULL;
470
471 // Rules of Class.getSuperClass as implemented by KLass::java_super:
472 // arrays return Object
473 // interfaces return NULL
474 // proper classes return Klass::super()
475 Klass* k = java_lang_Class::as_Klass(mirror);
476 if (k->is_interface()) return NULL;
477
478 // return mirror for superclass
479 Klass* super = k->java_super();
480 // super2 is the value computed by the compiler's getSuperClass intrinsic:
481 debug_only(Klass* super2 = ( k->is_array_klass()
482 ? vmClasses::Object_klass()
483 : k->super() ) );
484 assert(super == super2,
485 "java_super computation depends on interface, array, other super");
486 obj = (super == NULL) ? NULL : (jclass) JNIHandles::make_local(THREAD, super->java_mirror());
487 return obj;
488 JNI_END
489
490 JNI_ENTRY_NO_PRESERVE(jboolean, jni_IsAssignableFrom(JNIEnv *env, jclass sub, jclass super))
491 HOTSPOT_JNI_ISASSIGNABLEFROM_ENTRY(env, sub, super);
492
493 oop sub_mirror = JNIHandles::resolve_non_null(sub);
494 oop super_mirror = JNIHandles::resolve_non_null(super);
495 if (java_lang_Class::is_primitive(sub_mirror) ||
496 java_lang_Class::is_primitive(super_mirror)) {
497 jboolean ret = (sub_mirror == super_mirror);
498
499 HOTSPOT_JNI_ISASSIGNABLEFROM_RETURN(ret);
500 return ret;
501 }
502 Klass* sub_klass = java_lang_Class::as_Klass(sub_mirror);
503 Klass* super_klass = java_lang_Class::as_Klass(super_mirror);
504 assert(sub_klass != NULL && super_klass != NULL, "invalid arguments to jni_IsAssignableFrom");
505 jboolean ret;
506 if (sub_klass == super_klass && sub_klass->is_inline_klass()) {
507 // val type is a subtype of ref type
508 InlineKlass* ik = InlineKlass::cast(sub_klass);
509 if (sub_mirror == super_mirror || (ik->val_mirror() == sub_mirror && ik->ref_mirror() == super_mirror)) {
510 ret = JNI_TRUE;
511 } else {
512 ret = JNI_FALSE;
513 }
514 } else {
515 ret = sub_klass->is_subtype_of(super_klass) ? JNI_TRUE : JNI_FALSE;
516 }
517 HOTSPOT_JNI_ISASSIGNABLEFROM_RETURN(ret);
518 return ret;
519 JNI_END
520
521
522 DT_RETURN_MARK_DECL(Throw, jint
523 , HOTSPOT_JNI_THROW_RETURN(_ret_ref));
524
525 JNI_ENTRY(jint, jni_Throw(JNIEnv *env, jthrowable obj))
526 HOTSPOT_JNI_THROW_ENTRY(env, obj);
527
528 jint ret = JNI_OK;
529 DT_RETURN_MARK(Throw, jint, (const jint&)ret);
530
531 THROW_OOP_(JNIHandles::resolve(obj), JNI_OK);
532 ShouldNotReachHere();
533 return 0; // Mute compiler.
534 JNI_END
535
536
537 DT_RETURN_MARK_DECL(ThrowNew, jint
538 , HOTSPOT_JNI_THROWNEW_RETURN(_ret_ref));
539
540 JNI_ENTRY(jint, jni_ThrowNew(JNIEnv *env, jclass clazz, const char *message))
541 HOTSPOT_JNI_THROWNEW_ENTRY(env, clazz, (char *) message);
542
543 jint ret = JNI_OK;
544 DT_RETURN_MARK(ThrowNew, jint, (const jint&)ret);
545
546 InstanceKlass* k = InstanceKlass::cast(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz)));
547 Symbol* name = k->name();
548 Handle class_loader (THREAD, k->class_loader());
549 Handle protection_domain (THREAD, k->protection_domain());
550 THROW_MSG_LOADER_(name, (char *)message, class_loader, protection_domain, JNI_OK);
551 ShouldNotReachHere();
552 return 0; // Mute compiler.
553 JNI_END
554
555
556 // JNI functions only transform a pending async exception to a synchronous
557 // exception in ExceptionOccurred and ExceptionCheck calls, since
558 // delivering an async exception in other places won't change the native
559 // code's control flow and would be harmful when native code further calls
560 // JNI functions with a pending exception. Async exception is also checked
561 // during the call, so ExceptionOccurred/ExceptionCheck won't return
562 // false but deliver the async exception at the very end during
563 // state transition.
564
565 static void jni_check_async_exceptions(JavaThread *thread) {
566 assert(thread == Thread::current(), "must be itself");
567 if (thread->has_async_exception_condition()) {
568 SafepointMechanism::process_if_requested_with_exit_check(thread, true /* check asyncs */);
569 }
570 }
571
572 JNI_ENTRY_NO_PRESERVE(jthrowable, jni_ExceptionOccurred(JNIEnv *env))
573 HOTSPOT_JNI_EXCEPTIONOCCURRED_ENTRY(env);
574
575 jni_check_async_exceptions(thread);
576 oop exception = thread->pending_exception();
577 jthrowable ret = (jthrowable) JNIHandles::make_local(THREAD, exception);
578
579 HOTSPOT_JNI_EXCEPTIONOCCURRED_RETURN(ret);
580 return ret;
581 JNI_END
582
583
584 JNI_ENTRY_NO_PRESERVE(void, jni_ExceptionDescribe(JNIEnv *env))
585 HOTSPOT_JNI_EXCEPTIONDESCRIBE_ENTRY(env);
586
587 if (thread->has_pending_exception()) {
588 Handle ex(thread, thread->pending_exception());
589 thread->clear_pending_exception();
590 jio_fprintf(defaultStream::error_stream(), "Exception ");
591 if (thread != NULL && thread->threadObj() != NULL) {
592 ResourceMark rm(THREAD);
593 jio_fprintf(defaultStream::error_stream(),
594 "in thread \"%s\" ", thread->name());
595 }
596 if (ex->is_a(vmClasses::Throwable_klass())) {
597 JavaValue result(T_VOID);
598 JavaCalls::call_virtual(&result,
599 ex,
600 vmClasses::Throwable_klass(),
601 vmSymbols::printStackTrace_name(),
602 vmSymbols::void_method_signature(),
603 THREAD);
604 // If an exception is thrown in the call it gets thrown away. Not much
605 // we can do with it. The native code that calls this, does not check
606 // for the exception - hence, it might still be in the thread when DestroyVM gets
607 // called, potentially causing a few asserts to trigger - since no pending exception
608 // is expected.
609 CLEAR_PENDING_EXCEPTION;
610 } else {
611 ResourceMark rm(THREAD);
612 jio_fprintf(defaultStream::error_stream(),
613 ". Uncaught exception of type %s.",
614 ex->klass()->external_name());
615 }
616 }
617
618 HOTSPOT_JNI_EXCEPTIONDESCRIBE_RETURN();
619 JNI_END
620
621
622 JNI_ENTRY_NO_PRESERVE(void, jni_ExceptionClear(JNIEnv *env))
623 HOTSPOT_JNI_EXCEPTIONCLEAR_ENTRY(env);
624
625 // The jni code might be using this API to clear java thrown exception.
626 // So just mark jvmti thread exception state as exception caught.
627 JvmtiThreadState *state = JavaThread::current()->jvmti_thread_state();
628 if (state != NULL && state->is_exception_detected()) {
629 state->set_exception_caught();
630 }
631 thread->clear_pending_exception();
632
633 HOTSPOT_JNI_EXCEPTIONCLEAR_RETURN();
634 JNI_END
635
636
637 JNI_ENTRY(void, jni_FatalError(JNIEnv *env, const char *msg))
638 HOTSPOT_JNI_FATALERROR_ENTRY(env, (char *) msg);
639
640 tty->print_cr("FATAL ERROR in native method: %s", msg);
641 thread->print_jni_stack();
642 os::abort(); // Dump core and abort
643 JNI_END
644
645
646 JNI_ENTRY(jint, jni_PushLocalFrame(JNIEnv *env, jint capacity))
647 HOTSPOT_JNI_PUSHLOCALFRAME_ENTRY(env, capacity);
648
649 //%note jni_11
650 if (capacity < 0 ||
651 ((MaxJNILocalCapacity > 0) && (capacity > MaxJNILocalCapacity))) {
652 HOTSPOT_JNI_PUSHLOCALFRAME_RETURN((uint32_t)JNI_ERR);
653 return JNI_ERR;
654 }
655
656 thread->push_jni_handle_block();
657 jint ret = JNI_OK;
658 HOTSPOT_JNI_PUSHLOCALFRAME_RETURN(ret);
659 return ret;
660 JNI_END
661
662
663 JNI_ENTRY(jobject, jni_PopLocalFrame(JNIEnv *env, jobject result))
664 HOTSPOT_JNI_POPLOCALFRAME_ENTRY(env, result);
665
666 //%note jni_11
667 Handle result_handle(thread, JNIHandles::resolve(result));
668 JNIHandleBlock* old_handles = thread->active_handles();
669 JNIHandleBlock* new_handles = old_handles->pop_frame_link();
670 if (new_handles != NULL) {
671 // As a sanity check we only release the handle blocks if the pop_frame_link is not NULL.
672 // This way code will still work if PopLocalFrame is called without a corresponding
673 // PushLocalFrame call. Note that we set the pop_frame_link to NULL explicitly, otherwise
674 // the release_block call will release the blocks.
675 thread->set_active_handles(new_handles);
676 old_handles->set_pop_frame_link(NULL); // clear link we won't release new_handles below
677 JNIHandleBlock::release_block(old_handles, thread); // may block
678 result = JNIHandles::make_local(thread, result_handle());
679 }
680 HOTSPOT_JNI_POPLOCALFRAME_RETURN(result);
681 return result;
682 JNI_END
683
684
685 JNI_ENTRY(jobject, jni_NewGlobalRef(JNIEnv *env, jobject ref))
686 HOTSPOT_JNI_NEWGLOBALREF_ENTRY(env, ref);
687
688 Handle ref_handle(thread, JNIHandles::resolve(ref));
689 jobject ret = JNIHandles::make_global(ref_handle, AllocFailStrategy::RETURN_NULL);
690
691 HOTSPOT_JNI_NEWGLOBALREF_RETURN(ret);
692 return ret;
693 JNI_END
694
695 // Must be JNI_ENTRY (with HandleMark)
696 JNI_ENTRY_NO_PRESERVE(void, jni_DeleteGlobalRef(JNIEnv *env, jobject ref))
697 HOTSPOT_JNI_DELETEGLOBALREF_ENTRY(env, ref);
698
699 JNIHandles::destroy_global(ref);
700
701 HOTSPOT_JNI_DELETEGLOBALREF_RETURN();
702 JNI_END
703
704 JNI_ENTRY_NO_PRESERVE(void, jni_DeleteLocalRef(JNIEnv *env, jobject obj))
705 HOTSPOT_JNI_DELETELOCALREF_ENTRY(env, obj);
706
707 JNIHandles::destroy_local(obj);
708
709 HOTSPOT_JNI_DELETELOCALREF_RETURN();
710 JNI_END
711
712 JNI_ENTRY_NO_PRESERVE(jboolean, jni_IsSameObject(JNIEnv *env, jobject r1, jobject r2))
713 HOTSPOT_JNI_ISSAMEOBJECT_ENTRY(env, r1, r2);
714
715 jboolean ret = JNIHandles::is_same_object(r1, r2) ? JNI_TRUE : JNI_FALSE;
716
717 HOTSPOT_JNI_ISSAMEOBJECT_RETURN(ret);
718 return ret;
719 JNI_END
720
721
722 JNI_ENTRY(jobject, jni_NewLocalRef(JNIEnv *env, jobject ref))
723 HOTSPOT_JNI_NEWLOCALREF_ENTRY(env, ref);
724
725 jobject ret = JNIHandles::make_local(THREAD, JNIHandles::resolve(ref),
726 AllocFailStrategy::RETURN_NULL);
727
728 HOTSPOT_JNI_NEWLOCALREF_RETURN(ret);
729 return ret;
730 JNI_END
731
732 JNI_LEAF(jint, jni_EnsureLocalCapacity(JNIEnv *env, jint capacity))
733 HOTSPOT_JNI_ENSURELOCALCAPACITY_ENTRY(env, capacity);
734
735 jint ret;
736 if (capacity >= 0 &&
737 ((MaxJNILocalCapacity <= 0) || (capacity <= MaxJNILocalCapacity))) {
738 ret = JNI_OK;
739 } else {
740 ret = JNI_ERR;
741 }
742
743 HOTSPOT_JNI_ENSURELOCALCAPACITY_RETURN(ret);
744 return ret;
745 JNI_END
746
747 // Return the Handle Type
748 JNI_LEAF(jobjectRefType, jni_GetObjectRefType(JNIEnv *env, jobject obj))
749 HOTSPOT_JNI_GETOBJECTREFTYPE_ENTRY(env, obj);
750
751 jobjectRefType ret = JNIInvalidRefType;
752 if (obj != NULL) {
753 ret = JNIHandles::handle_type(thread, obj);
754 }
755
756 HOTSPOT_JNI_GETOBJECTREFTYPE_RETURN((void *) ret);
757 return ret;
758 JNI_END
759
760
761 class JNI_ArgumentPusher : public SignatureIterator {
762 protected:
763 JavaCallArguments* _arguments;
764
765 void push_int(jint x) { _arguments->push_int(x); }
766 void push_long(jlong x) { _arguments->push_long(x); }
767 void push_float(jfloat x) { _arguments->push_float(x); }
768 void push_double(jdouble x) { _arguments->push_double(x); }
769 void push_object(jobject x) { _arguments->push_jobject(x); }
770
771 void push_boolean(jboolean b) {
772 // Normalize boolean arguments from native code by converting 1-255 to JNI_TRUE and
773 // 0 to JNI_FALSE. Boolean return values from native are normalized the same in
774 // TemplateInterpreterGenerator::generate_result_handler_for and
775 // SharedRuntime::generate_native_wrapper.
776 push_int(b == 0 ? JNI_FALSE : JNI_TRUE);
777 }
778
779 JNI_ArgumentPusher(Method* method)
780 : SignatureIterator(method->signature(),
781 Fingerprinter(methodHandle(Thread::current(), method)).fingerprint())
782 {
783 _arguments = NULL;
784 }
785
786 public:
787 virtual void push_arguments_on(JavaCallArguments* arguments) = 0;
788 };
789
790
791 class JNI_ArgumentPusherVaArg : public JNI_ArgumentPusher {
792 va_list _ap;
793
794 void set_ap(va_list rap) {
795 va_copy(_ap, rap);
796 }
797
798 friend class SignatureIterator; // so do_parameters_on can call do_type
799 void do_type(BasicType type) {
800 switch (type) {
801 // these are coerced to int when using va_arg
802 case T_BYTE:
803 case T_CHAR:
804 case T_SHORT:
805 case T_INT: push_int(va_arg(_ap, jint)); break;
806 case T_BOOLEAN: push_boolean((jboolean) va_arg(_ap, jint)); break;
807
808 // each of these paths is exercised by the various jck Call[Static,Nonvirtual,][Void,Int,..]Method[A,V,] tests
809
810 case T_LONG: push_long(va_arg(_ap, jlong)); break;
811 // float is coerced to double w/ va_arg
812 case T_FLOAT: push_float((jfloat) va_arg(_ap, jdouble)); break;
813 case T_DOUBLE: push_double(va_arg(_ap, jdouble)); break;
814
815 case T_ARRAY:
816 case T_OBJECT:
817 case T_PRIMITIVE_OBJECT: push_object(va_arg(_ap, jobject)); break;
818 default: ShouldNotReachHere();
819 }
820 }
821
822 public:
823 JNI_ArgumentPusherVaArg(jmethodID method_id, va_list rap)
824 : JNI_ArgumentPusher(Method::resolve_jmethod_id(method_id)) {
825 set_ap(rap);
826 }
827
828 ~JNI_ArgumentPusherVaArg() {
829 va_end(_ap);
830 }
831
832 virtual void push_arguments_on(JavaCallArguments* arguments) {
833 _arguments = arguments;
834 do_parameters_on(this);
835 }
836 };
837
838
839 class JNI_ArgumentPusherArray : public JNI_ArgumentPusher {
840 protected:
841 const jvalue *_ap;
842
843 inline void set_ap(const jvalue *rap) { _ap = rap; }
844
845 friend class SignatureIterator; // so do_parameters_on can call do_type
846 void do_type(BasicType type) {
847 switch (type) {
848 case T_CHAR: push_int((_ap++)->c); break;
849 case T_SHORT: push_int((_ap++)->s); break;
850 case T_BYTE: push_int((_ap++)->b); break;
851 case T_INT: push_int((_ap++)->i); break;
852 case T_BOOLEAN: push_boolean((_ap++)->z); break;
853 case T_LONG: push_long((_ap++)->j); break;
854 case T_FLOAT: push_float((_ap++)->f); break;
855 case T_DOUBLE: push_double((_ap++)->d); break;
856 case T_ARRAY:
857 case T_OBJECT:
858 case T_PRIMITIVE_OBJECT: push_object((_ap++)->l); break;
859 default: ShouldNotReachHere();
860 }
861 }
862
863 public:
864 JNI_ArgumentPusherArray(jmethodID method_id, const jvalue *rap)
865 : JNI_ArgumentPusher(Method::resolve_jmethod_id(method_id)) {
866 set_ap(rap);
867 }
868
869 virtual void push_arguments_on(JavaCallArguments* arguments) {
870 _arguments = arguments;
871 do_parameters_on(this);
872 }
873 };
874
875
876 enum JNICallType {
877 JNI_STATIC,
878 JNI_VIRTUAL,
879 JNI_NONVIRTUAL
880 };
881
882
883
884 static void jni_invoke_static(JNIEnv *env, JavaValue* result, jobject receiver, JNICallType call_type, jmethodID method_id, JNI_ArgumentPusher *args, TRAPS) {
885 methodHandle method(THREAD, Method::resolve_jmethod_id(method_id));
886
887 // Create object to hold arguments for the JavaCall, and associate it with
888 // the jni parser
889 ResourceMark rm(THREAD);
890 int number_of_parameters = method->size_of_parameters();
891 JavaCallArguments java_args(number_of_parameters);
892
893 assert(method->is_static(), "method should be static");
894
895 // Fill out JavaCallArguments object
896 args->push_arguments_on(&java_args);
897 // Initialize result type
898 result->set_type(args->return_type());
899
900 // Invoke the method. Result is returned as oop.
901 JavaCalls::call(result, method, &java_args, CHECK);
902
903 // Convert result
904 if (is_reference_type(result->get_type())) {
905 result->set_jobject(JNIHandles::make_local(THREAD, result->get_oop()));
906 }
907 }
908
909
910 static void jni_invoke_nonstatic(JNIEnv *env, JavaValue* result, jobject receiver, JNICallType call_type, jmethodID method_id, JNI_ArgumentPusher *args, TRAPS) {
911 oop recv = JNIHandles::resolve(receiver);
912 if (recv == NULL) {
913 THROW(vmSymbols::java_lang_NullPointerException());
914 }
915 Handle h_recv(THREAD, recv);
916
917 int number_of_parameters;
918 Method* selected_method;
919 {
920 Method* m = Method::resolve_jmethod_id(method_id);
921 number_of_parameters = m->size_of_parameters();
922 InstanceKlass* holder = m->method_holder();
923 if (call_type != JNI_VIRTUAL) {
924 selected_method = m;
925 } else if (!m->has_itable_index()) {
926 // non-interface call -- for that little speed boost, don't handlize
927 debug_only(NoSafepointVerifier nosafepoint;)
928 // jni_GetMethodID makes sure class is linked and initialized
929 // so m should have a valid vtable index.
930 assert(m->valid_vtable_index(), "no valid vtable index");
931 int vtbl_index = m->vtable_index();
932 if (vtbl_index != Method::nonvirtual_vtable_index) {
933 selected_method = h_recv->klass()->method_at_vtable(vtbl_index);
934 } else {
935 // final method
936 selected_method = m;
937 }
938 } else {
939 // interface call
940 int itbl_index = m->itable_index();
941 Klass* k = h_recv->klass();
942 selected_method = InstanceKlass::cast(k)->method_at_itable(holder, itbl_index, CHECK);
943 }
944 }
945
946 methodHandle method(THREAD, selected_method);
947
948 // Create object to hold arguments for the JavaCall, and associate it with
949 // the jni parser
950 ResourceMark rm(THREAD);
951 JavaCallArguments java_args(number_of_parameters);
952
953 // handle arguments
954 assert(!method->is_static(), "method %s should not be static", method->name_and_sig_as_C_string());
955 java_args.push_oop(h_recv); // Push jobject handle
956
957 // Fill out JavaCallArguments object
958 args->push_arguments_on(&java_args);
959 // Initialize result type
960 result->set_type(args->return_type());
961
962 // Invoke the method. Result is returned as oop.
963 JavaCalls::call(result, method, &java_args, CHECK);
964
965 // Convert result
966 if (is_reference_type(result->get_type())) {
967 result->set_jobject(JNIHandles::make_local(THREAD, result->get_oop()));
968 }
969 }
970
971 DT_RETURN_MARK_DECL(AllocObject, jobject
972 , HOTSPOT_JNI_ALLOCOBJECT_RETURN(_ret_ref));
973
974 JNI_ENTRY(jobject, jni_AllocObject(JNIEnv *env, jclass clazz))
975 HOTSPOT_JNI_ALLOCOBJECT_ENTRY(env, clazz);
976
977 jobject ret = NULL;
978 DT_RETURN_MARK(AllocObject, jobject, (const jobject&)ret);
979
980 instanceOop i = InstanceKlass::allocate_instance(JNIHandles::resolve_non_null(clazz), CHECK_NULL);
981 ret = JNIHandles::make_local(THREAD, i);
982 return ret;
983 JNI_END
984
985 DT_RETURN_MARK_DECL(NewObjectA, jobject
986 , HOTSPOT_JNI_NEWOBJECTA_RETURN(_ret_ref));
987
988 JNI_ENTRY(jobject, jni_NewObjectA(JNIEnv *env, jclass clazz, jmethodID methodID, const jvalue *args))
989 HOTSPOT_JNI_NEWOBJECTA_ENTRY(env, clazz, (uintptr_t) methodID);
990
991 jobject obj = NULL;
992 DT_RETURN_MARK(NewObjectA, jobject, (const jobject&)obj);
993
994 oop clazzoop = JNIHandles::resolve_non_null(clazz);
995 Klass* k = java_lang_Class::as_Klass(clazzoop);
996 if (k == NULL) {
997 ResourceMark rm(THREAD);
998 THROW_(vmSymbols::java_lang_InstantiationException(), NULL);
999 }
1000
1001 if (!k->is_inline_klass()) {
1002 instanceOop i = InstanceKlass::allocate_instance(clazzoop, CHECK_NULL);
1003 obj = JNIHandles::make_local(THREAD, i);
1004 JavaValue jvalue(T_VOID);
1005 JNI_ArgumentPusherArray ap(methodID, args);
1006 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_NULL);
1007 } else {
1008 JavaValue jvalue(T_PRIMITIVE_OBJECT);
1009 JNI_ArgumentPusherArray ap(methodID, args);
1010 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK_NULL);
1011 obj = jvalue.get_jobject();
1012 }
1013 return obj;
1014 JNI_END
1015
1016
1017 DT_RETURN_MARK_DECL(NewObjectV, jobject
1018 , HOTSPOT_JNI_NEWOBJECTV_RETURN(_ret_ref));
1019
1020 JNI_ENTRY(jobject, jni_NewObjectV(JNIEnv *env, jclass clazz, jmethodID methodID, va_list args))
1021 HOTSPOT_JNI_NEWOBJECTV_ENTRY(env, clazz, (uintptr_t) methodID);
1022
1023 jobject obj = NULL;
1024 DT_RETURN_MARK(NewObjectV, jobject, (const jobject&)obj);
1025
1026 oop clazzoop = JNIHandles::resolve_non_null(clazz);
1027 Klass* k = java_lang_Class::as_Klass(clazzoop);
1028 if (k == NULL) {
1029 ResourceMark rm(THREAD);
1030 THROW_(vmSymbols::java_lang_InstantiationException(), NULL);
1031 }
1032
1033 if (!k->is_inline_klass()) {
1034 instanceOop i = InstanceKlass::allocate_instance(clazzoop, CHECK_NULL);
1035 obj = JNIHandles::make_local(THREAD, i);
1036 JavaValue jvalue(T_VOID);
1037 JNI_ArgumentPusherVaArg ap(methodID, args);
1038 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_NULL);
1039 } else {
1040 JavaValue jvalue(T_PRIMITIVE_OBJECT);
1041 JNI_ArgumentPusherVaArg ap(methodID, args);
1042 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK_NULL);
1043 obj = jvalue.get_jobject();
1044 }
1045 return obj;
1046 JNI_END
1047
1048
1049 DT_RETURN_MARK_DECL(NewObject, jobject
1050 , HOTSPOT_JNI_NEWOBJECT_RETURN(_ret_ref));
1051
1052 JNI_ENTRY(jobject, jni_NewObject(JNIEnv *env, jclass clazz, jmethodID methodID, ...))
1053 HOTSPOT_JNI_NEWOBJECT_ENTRY(env, clazz, (uintptr_t) methodID);
1054
1055 jobject obj = NULL;
1056 DT_RETURN_MARK(NewObject, jobject, (const jobject&)obj);
1057
1058 oop clazzoop = JNIHandles::resolve_non_null(clazz);
1059 Klass* k = java_lang_Class::as_Klass(clazzoop);
1060 if (k == NULL) {
1061 ResourceMark rm(THREAD);
1062 THROW_(vmSymbols::java_lang_InstantiationException(), NULL);
1063 }
1064
1065 if (!k->is_inline_klass()) {
1066 instanceOop i = InstanceKlass::allocate_instance(clazzoop, CHECK_NULL);
1067 obj = JNIHandles::make_local(THREAD, i);
1068 va_list args;
1069 va_start(args, methodID);
1070 JavaValue jvalue(T_VOID);
1071 JNI_ArgumentPusherVaArg ap(methodID, args);
1072 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_NULL);
1073 va_end(args);
1074 } else {
1075 va_list args;
1076 va_start(args, methodID);
1077 JavaValue jvalue(T_PRIMITIVE_OBJECT);
1078 JNI_ArgumentPusherVaArg ap(methodID, args);
1079 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK_NULL);
1080 va_end(args);
1081 obj = jvalue.get_jobject();
1082 }
1083 return obj;
1084 JNI_END
1085
1086
1087 JNI_ENTRY(jclass, jni_GetObjectClass(JNIEnv *env, jobject obj))
1088 HOTSPOT_JNI_GETOBJECTCLASS_ENTRY(env, obj);
1089
1090 Klass* k = JNIHandles::resolve_non_null(obj)->klass();
1091 jclass ret =
1092 (jclass) JNIHandles::make_local(THREAD, k->java_mirror());
1093
1094 HOTSPOT_JNI_GETOBJECTCLASS_RETURN(ret);
1095 return ret;
1096 JNI_END
1097
1098 JNI_ENTRY_NO_PRESERVE(jboolean, jni_IsInstanceOf(JNIEnv *env, jobject obj, jclass clazz))
1099 HOTSPOT_JNI_ISINSTANCEOF_ENTRY(env, obj, clazz);
1100
1101 jboolean ret = JNI_TRUE;
1102 if (obj != NULL) {
1103 ret = JNI_FALSE;
1104 Klass* k = java_lang_Class::as_Klass(
1105 JNIHandles::resolve_non_null(clazz));
1106 if (k != NULL) {
1107 ret = JNIHandles::resolve_non_null(obj)->is_a(k) ? JNI_TRUE : JNI_FALSE;
1108 }
1109 }
1110
1111 HOTSPOT_JNI_ISINSTANCEOF_RETURN(ret);
1112 return ret;
1113 JNI_END
1114
1115
1116 static jmethodID get_method_id(JNIEnv *env, jclass clazz, const char *name_str,
1117 const char *sig, bool is_static, TRAPS) {
1118 // %%%% This code should probably just call into a method in the LinkResolver
1119 //
1120 // The class should have been loaded (we have an instance of the class
1121 // passed in) so the method and signature should already be in the symbol
1122 // table. If they're not there, the method doesn't exist.
1123 const char *name_to_probe = (name_str == NULL)
1124 ? vmSymbols::object_initializer_name()->as_C_string()
1125 : name_str;
1126 TempNewSymbol name = SymbolTable::probe(name_to_probe, (int)strlen(name_to_probe));
1127 TempNewSymbol signature = SymbolTable::probe(sig, (int)strlen(sig));
1128
1129 if (name == NULL || signature == NULL) {
1130 THROW_MSG_0(vmSymbols::java_lang_NoSuchMethodError(), name_str);
1131 }
1132
1133 oop mirror = JNIHandles::resolve_non_null(clazz);
1134 Klass* klass = java_lang_Class::as_Klass(mirror);
1135
1136 // Throw a NoSuchMethodError exception if we have an instance of a
1137 // primitive java.lang.Class
1138 if (java_lang_Class::is_primitive(mirror)) {
1139 ResourceMark rm(THREAD);
1140 THROW_MSG_0(vmSymbols::java_lang_NoSuchMethodError(), err_msg("%s%s.%s%s", is_static ? "static " : "", klass->signature_name(), name_str, sig));
1141 }
1142
1143 // Make sure class is linked and initialized before handing id's out to
1144 // Method*s.
1145 klass->initialize(CHECK_NULL);
1146
1147 Method* m;
1148 if (name == vmSymbols::object_initializer_name() ||
1149 name == vmSymbols::class_initializer_name()) {
1150 // Never search superclasses for constructors
1151 if (klass->is_instance_klass()) {
1152 m = InstanceKlass::cast(klass)->find_method(name, signature);
1153 } else {
1154 m = NULL;
1155 }
1156 } else {
1157 m = klass->lookup_method(name, signature);
1158 if (m == NULL && klass->is_instance_klass()) {
1159 m = InstanceKlass::cast(klass)->lookup_method_in_ordered_interfaces(name, signature);
1160 }
1161 }
1162 if (m == NULL || (m->is_static() != is_static)) {
1163 ResourceMark rm(THREAD);
1164 THROW_MSG_0(vmSymbols::java_lang_NoSuchMethodError(), err_msg("%s%s.%s%s", is_static ? "static " : "", klass->signature_name(), name_str, sig));
1165 }
1166 return m->jmethod_id();
1167 }
1168
1169
1170 JNI_ENTRY(jmethodID, jni_GetMethodID(JNIEnv *env, jclass clazz,
1171 const char *name, const char *sig))
1172 HOTSPOT_JNI_GETMETHODID_ENTRY(env, clazz, (char *) name, (char *) sig);
1173 jmethodID ret = get_method_id(env, clazz, name, sig, false, thread);
1174 HOTSPOT_JNI_GETMETHODID_RETURN((uintptr_t) ret);
1175 return ret;
1176 JNI_END
1177
1178
1179 JNI_ENTRY(jmethodID, jni_GetStaticMethodID(JNIEnv *env, jclass clazz,
1180 const char *name, const char *sig))
1181 HOTSPOT_JNI_GETSTATICMETHODID_ENTRY(env, (char *) clazz, (char *) name, (char *)sig);
1182 jmethodID ret = get_method_id(env, clazz, name, sig, true, thread);
1183 HOTSPOT_JNI_GETSTATICMETHODID_RETURN((uintptr_t) ret);
1184 return ret;
1185 JNI_END
1186
1187
1188
1189 //
1190 // Calling Methods
1191 //
1192
1193
1194 #define DEFINE_CALLMETHOD(ResultType, Result, Tag \
1195 , EntryProbe, ReturnProbe) \
1196 \
1197 DT_RETURN_MARK_DECL_FOR(Result, Call##Result##Method, ResultType \
1198 , ReturnProbe); \
1199 \
1200 JNI_ENTRY(ResultType, \
1201 jni_Call##Result##Method(JNIEnv *env, jobject obj, jmethodID methodID, ...)) \
1202 \
1203 EntryProbe; \
1204 ResultType ret = 0;\
1205 DT_RETURN_MARK_FOR(Result, Call##Result##Method, ResultType, \
1206 (const ResultType&)ret);\
1207 \
1208 va_list args; \
1209 va_start(args, methodID); \
1210 JavaValue jvalue(Tag); \
1211 JNI_ArgumentPusherVaArg ap(methodID, args); \
1212 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK_0); \
1213 va_end(args); \
1214 ret = jvalue.get_##ResultType(); \
1215 return ret;\
1216 JNI_END
1217
1218 // the runtime type of subword integral basic types is integer
1219 DEFINE_CALLMETHOD(jboolean, Boolean, T_BOOLEAN
1220 , HOTSPOT_JNI_CALLBOOLEANMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1221 HOTSPOT_JNI_CALLBOOLEANMETHOD_RETURN(_ret_ref))
1222 DEFINE_CALLMETHOD(jbyte, Byte, T_BYTE
1223 , HOTSPOT_JNI_CALLBYTEMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1224 HOTSPOT_JNI_CALLBYTEMETHOD_RETURN(_ret_ref))
1225 DEFINE_CALLMETHOD(jchar, Char, T_CHAR
1226 , HOTSPOT_JNI_CALLCHARMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1227 HOTSPOT_JNI_CALLCHARMETHOD_RETURN(_ret_ref))
1228 DEFINE_CALLMETHOD(jshort, Short, T_SHORT
1229 , HOTSPOT_JNI_CALLSHORTMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1230 HOTSPOT_JNI_CALLSHORTMETHOD_RETURN(_ret_ref))
1231
1232 DEFINE_CALLMETHOD(jobject, Object, T_OBJECT
1233 , HOTSPOT_JNI_CALLOBJECTMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1234 HOTSPOT_JNI_CALLOBJECTMETHOD_RETURN(_ret_ref))
1235 DEFINE_CALLMETHOD(jint, Int, T_INT,
1236 HOTSPOT_JNI_CALLINTMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1237 HOTSPOT_JNI_CALLINTMETHOD_RETURN(_ret_ref))
1238 DEFINE_CALLMETHOD(jlong, Long, T_LONG
1239 , HOTSPOT_JNI_CALLLONGMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1240 HOTSPOT_JNI_CALLLONGMETHOD_RETURN(_ret_ref))
1241 // Float and double probes don't return value because dtrace doesn't currently support it
1242 DEFINE_CALLMETHOD(jfloat, Float, T_FLOAT
1243 , HOTSPOT_JNI_CALLFLOATMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1244 HOTSPOT_JNI_CALLFLOATMETHOD_RETURN())
1245 DEFINE_CALLMETHOD(jdouble, Double, T_DOUBLE
1246 , HOTSPOT_JNI_CALLDOUBLEMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1247 HOTSPOT_JNI_CALLDOUBLEMETHOD_RETURN())
1248
1249 #define DEFINE_CALLMETHODV(ResultType, Result, Tag \
1250 , EntryProbe, ReturnProbe) \
1251 \
1252 DT_RETURN_MARK_DECL_FOR(Result, Call##Result##MethodV, ResultType \
1253 , ReturnProbe); \
1254 \
1255 JNI_ENTRY(ResultType, \
1256 jni_Call##Result##MethodV(JNIEnv *env, jobject obj, jmethodID methodID, va_list args)) \
1257 \
1258 EntryProbe;\
1259 ResultType ret = 0;\
1260 DT_RETURN_MARK_FOR(Result, Call##Result##MethodV, ResultType, \
1261 (const ResultType&)ret);\
1262 \
1263 JavaValue jvalue(Tag); \
1264 JNI_ArgumentPusherVaArg ap(methodID, args); \
1265 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK_0); \
1266 ret = jvalue.get_##ResultType(); \
1267 return ret;\
1268 JNI_END
1269
1270 // the runtime type of subword integral basic types is integer
1271 DEFINE_CALLMETHODV(jboolean, Boolean, T_BOOLEAN
1272 , HOTSPOT_JNI_CALLBOOLEANMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1273 HOTSPOT_JNI_CALLBOOLEANMETHODV_RETURN(_ret_ref))
1274 DEFINE_CALLMETHODV(jbyte, Byte, T_BYTE
1275 , HOTSPOT_JNI_CALLBYTEMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1276 HOTSPOT_JNI_CALLBYTEMETHODV_RETURN(_ret_ref))
1277 DEFINE_CALLMETHODV(jchar, Char, T_CHAR
1278 , HOTSPOT_JNI_CALLCHARMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1279 HOTSPOT_JNI_CALLCHARMETHODV_RETURN(_ret_ref))
1280 DEFINE_CALLMETHODV(jshort, Short, T_SHORT
1281 , HOTSPOT_JNI_CALLSHORTMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1282 HOTSPOT_JNI_CALLSHORTMETHODV_RETURN(_ret_ref))
1283
1284 DEFINE_CALLMETHODV(jobject, Object, T_OBJECT
1285 , HOTSPOT_JNI_CALLOBJECTMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1286 HOTSPOT_JNI_CALLOBJECTMETHODV_RETURN(_ret_ref))
1287 DEFINE_CALLMETHODV(jint, Int, T_INT,
1288 HOTSPOT_JNI_CALLINTMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1289 HOTSPOT_JNI_CALLINTMETHODV_RETURN(_ret_ref))
1290 DEFINE_CALLMETHODV(jlong, Long, T_LONG
1291 , HOTSPOT_JNI_CALLLONGMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1292 HOTSPOT_JNI_CALLLONGMETHODV_RETURN(_ret_ref))
1293 // Float and double probes don't return value because dtrace doesn't currently support it
1294 DEFINE_CALLMETHODV(jfloat, Float, T_FLOAT
1295 , HOTSPOT_JNI_CALLFLOATMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1296 HOTSPOT_JNI_CALLFLOATMETHODV_RETURN())
1297 DEFINE_CALLMETHODV(jdouble, Double, T_DOUBLE
1298 , HOTSPOT_JNI_CALLDOUBLEMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1299 HOTSPOT_JNI_CALLDOUBLEMETHODV_RETURN())
1300
1301 #define DEFINE_CALLMETHODA(ResultType, Result, Tag \
1302 , EntryProbe, ReturnProbe) \
1303 \
1304 DT_RETURN_MARK_DECL_FOR(Result, Call##Result##MethodA, ResultType \
1305 , ReturnProbe); \
1306 \
1307 JNI_ENTRY(ResultType, \
1308 jni_Call##Result##MethodA(JNIEnv *env, jobject obj, jmethodID methodID, const jvalue *args)) \
1309 EntryProbe; \
1310 ResultType ret = 0;\
1311 DT_RETURN_MARK_FOR(Result, Call##Result##MethodA, ResultType, \
1312 (const ResultType&)ret);\
1313 \
1314 JavaValue jvalue(Tag); \
1315 JNI_ArgumentPusherArray ap(methodID, args); \
1316 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK_0); \
1317 ret = jvalue.get_##ResultType(); \
1318 return ret;\
1319 JNI_END
1320
1321 // the runtime type of subword integral basic types is integer
1322 DEFINE_CALLMETHODA(jboolean, Boolean, T_BOOLEAN
1323 , HOTSPOT_JNI_CALLBOOLEANMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1324 HOTSPOT_JNI_CALLBOOLEANMETHODA_RETURN(_ret_ref))
1325 DEFINE_CALLMETHODA(jbyte, Byte, T_BYTE
1326 , HOTSPOT_JNI_CALLBYTEMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1327 HOTSPOT_JNI_CALLBYTEMETHODA_RETURN(_ret_ref))
1328 DEFINE_CALLMETHODA(jchar, Char, T_CHAR
1329 , HOTSPOT_JNI_CALLCHARMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1330 HOTSPOT_JNI_CALLCHARMETHODA_RETURN(_ret_ref))
1331 DEFINE_CALLMETHODA(jshort, Short, T_SHORT
1332 , HOTSPOT_JNI_CALLSHORTMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1333 HOTSPOT_JNI_CALLSHORTMETHODA_RETURN(_ret_ref))
1334
1335 DEFINE_CALLMETHODA(jobject, Object, T_OBJECT
1336 , HOTSPOT_JNI_CALLOBJECTMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1337 HOTSPOT_JNI_CALLOBJECTMETHODA_RETURN(_ret_ref))
1338 DEFINE_CALLMETHODA(jint, Int, T_INT,
1339 HOTSPOT_JNI_CALLINTMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1340 HOTSPOT_JNI_CALLINTMETHODA_RETURN(_ret_ref))
1341 DEFINE_CALLMETHODA(jlong, Long, T_LONG
1342 , HOTSPOT_JNI_CALLLONGMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1343 HOTSPOT_JNI_CALLLONGMETHODA_RETURN(_ret_ref))
1344 // Float and double probes don't return value because dtrace doesn't currently support it
1345 DEFINE_CALLMETHODA(jfloat, Float, T_FLOAT
1346 , HOTSPOT_JNI_CALLFLOATMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1347 HOTSPOT_JNI_CALLFLOATMETHODA_RETURN())
1348 DEFINE_CALLMETHODA(jdouble, Double, T_DOUBLE
1349 , HOTSPOT_JNI_CALLDOUBLEMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1350 HOTSPOT_JNI_CALLDOUBLEMETHODA_RETURN())
1351
1352 DT_VOID_RETURN_MARK_DECL(CallVoidMethod, HOTSPOT_JNI_CALLVOIDMETHOD_RETURN());
1353 DT_VOID_RETURN_MARK_DECL(CallVoidMethodV, HOTSPOT_JNI_CALLVOIDMETHODV_RETURN());
1354 DT_VOID_RETURN_MARK_DECL(CallVoidMethodA, HOTSPOT_JNI_CALLVOIDMETHODA_RETURN());
1355
1356
1357 JNI_ENTRY(void, jni_CallVoidMethod(JNIEnv *env, jobject obj, jmethodID methodID, ...))
1358 HOTSPOT_JNI_CALLVOIDMETHOD_ENTRY(env, obj, (uintptr_t) methodID);
1359 DT_VOID_RETURN_MARK(CallVoidMethod);
1360
1361 va_list args;
1362 va_start(args, methodID);
1363 JavaValue jvalue(T_VOID);
1364 JNI_ArgumentPusherVaArg ap(methodID, args);
1365 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK);
1366 va_end(args);
1367 JNI_END
1368
1369
1370 JNI_ENTRY(void, jni_CallVoidMethodV(JNIEnv *env, jobject obj, jmethodID methodID, va_list args))
1371 HOTSPOT_JNI_CALLVOIDMETHODV_ENTRY(env, obj, (uintptr_t) methodID);
1372 DT_VOID_RETURN_MARK(CallVoidMethodV);
1373
1374 JavaValue jvalue(T_VOID);
1375 JNI_ArgumentPusherVaArg ap(methodID, args);
1376 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK);
1377 JNI_END
1378
1379
1380 JNI_ENTRY(void, jni_CallVoidMethodA(JNIEnv *env, jobject obj, jmethodID methodID, const jvalue *args))
1381 HOTSPOT_JNI_CALLVOIDMETHODA_ENTRY(env, obj, (uintptr_t) methodID);
1382 DT_VOID_RETURN_MARK(CallVoidMethodA);
1383
1384 JavaValue jvalue(T_VOID);
1385 JNI_ArgumentPusherArray ap(methodID, args);
1386 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK);
1387 JNI_END
1388
1389
1390
1391 #define DEFINE_CALLNONVIRTUALMETHOD(ResultType, Result, Tag \
1392 , EntryProbe, ReturnProbe) \
1393 \
1394 DT_RETURN_MARK_DECL_FOR(Result, CallNonvirtual##Result##Method, ResultType \
1395 , ReturnProbe);\
1396 \
1397 JNI_ENTRY(ResultType, \
1398 jni_CallNonvirtual##Result##Method(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, ...)) \
1399 \
1400 EntryProbe;\
1401 ResultType ret;\
1402 DT_RETURN_MARK_FOR(Result, CallNonvirtual##Result##Method, ResultType, \
1403 (const ResultType&)ret);\
1404 \
1405 va_list args; \
1406 va_start(args, methodID); \
1407 JavaValue jvalue(Tag); \
1408 JNI_ArgumentPusherVaArg ap(methodID, args); \
1409 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_0); \
1410 va_end(args); \
1411 ret = jvalue.get_##ResultType(); \
1412 return ret;\
1413 JNI_END
1414
1415 // the runtime type of subword integral basic types is integer
1416 DEFINE_CALLNONVIRTUALMETHOD(jboolean, Boolean, T_BOOLEAN
1417 , HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1418 HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHOD_RETURN(_ret_ref))
1419 DEFINE_CALLNONVIRTUALMETHOD(jbyte, Byte, T_BYTE
1420 , HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1421 HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHOD_RETURN(_ret_ref))
1422 DEFINE_CALLNONVIRTUALMETHOD(jchar, Char, T_CHAR
1423 , HOTSPOT_JNI_CALLNONVIRTUALCHARMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1424 HOTSPOT_JNI_CALLNONVIRTUALCHARMETHOD_RETURN(_ret_ref))
1425 DEFINE_CALLNONVIRTUALMETHOD(jshort, Short, T_SHORT
1426 , HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1427 HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHOD_RETURN(_ret_ref))
1428
1429 DEFINE_CALLNONVIRTUALMETHOD(jobject, Object, T_OBJECT
1430 , HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1431 HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHOD_RETURN(_ret_ref))
1432 DEFINE_CALLNONVIRTUALMETHOD(jint, Int, T_INT
1433 , HOTSPOT_JNI_CALLNONVIRTUALINTMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1434 HOTSPOT_JNI_CALLNONVIRTUALINTMETHOD_RETURN(_ret_ref))
1435 DEFINE_CALLNONVIRTUALMETHOD(jlong, Long, T_LONG
1436 , HOTSPOT_JNI_CALLNONVIRTUALLONGMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1437 // Float and double probes don't return value because dtrace doesn't currently support it
1438 HOTSPOT_JNI_CALLNONVIRTUALLONGMETHOD_RETURN(_ret_ref))
1439 DEFINE_CALLNONVIRTUALMETHOD(jfloat, Float, T_FLOAT
1440 , HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1441 HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHOD_RETURN())
1442 DEFINE_CALLNONVIRTUALMETHOD(jdouble, Double, T_DOUBLE
1443 , HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1444 HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHOD_RETURN())
1445
1446 #define DEFINE_CALLNONVIRTUALMETHODV(ResultType, Result, Tag \
1447 , EntryProbe, ReturnProbe) \
1448 \
1449 DT_RETURN_MARK_DECL_FOR(Result, CallNonvirtual##Result##MethodV, ResultType \
1450 , ReturnProbe);\
1451 \
1452 JNI_ENTRY(ResultType, \
1453 jni_CallNonvirtual##Result##MethodV(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, va_list args)) \
1454 \
1455 EntryProbe;\
1456 ResultType ret;\
1457 DT_RETURN_MARK_FOR(Result, CallNonvirtual##Result##MethodV, ResultType, \
1458 (const ResultType&)ret);\
1459 \
1460 JavaValue jvalue(Tag); \
1461 JNI_ArgumentPusherVaArg ap(methodID, args); \
1462 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_0); \
1463 ret = jvalue.get_##ResultType(); \
1464 return ret;\
1465 JNI_END
1466
1467 // the runtime type of subword integral basic types is integer
1468 DEFINE_CALLNONVIRTUALMETHODV(jboolean, Boolean, T_BOOLEAN
1469 , HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1470 HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHODV_RETURN(_ret_ref))
1471 DEFINE_CALLNONVIRTUALMETHODV(jbyte, Byte, T_BYTE
1472 , HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1473 HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHODV_RETURN(_ret_ref))
1474 DEFINE_CALLNONVIRTUALMETHODV(jchar, Char, T_CHAR
1475 , HOTSPOT_JNI_CALLNONVIRTUALCHARMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1476 HOTSPOT_JNI_CALLNONVIRTUALCHARMETHODV_RETURN(_ret_ref))
1477 DEFINE_CALLNONVIRTUALMETHODV(jshort, Short, T_SHORT
1478 , HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1479 HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHODV_RETURN(_ret_ref))
1480
1481 DEFINE_CALLNONVIRTUALMETHODV(jobject, Object, T_OBJECT
1482 , HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1483 HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHODV_RETURN(_ret_ref))
1484 DEFINE_CALLNONVIRTUALMETHODV(jint, Int, T_INT
1485 , HOTSPOT_JNI_CALLNONVIRTUALINTMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1486 HOTSPOT_JNI_CALLNONVIRTUALINTMETHODV_RETURN(_ret_ref))
1487 DEFINE_CALLNONVIRTUALMETHODV(jlong, Long, T_LONG
1488 , HOTSPOT_JNI_CALLNONVIRTUALLONGMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1489 // Float and double probes don't return value because dtrace doesn't currently support it
1490 HOTSPOT_JNI_CALLNONVIRTUALLONGMETHODV_RETURN(_ret_ref))
1491 DEFINE_CALLNONVIRTUALMETHODV(jfloat, Float, T_FLOAT
1492 , HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1493 HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHODV_RETURN())
1494 DEFINE_CALLNONVIRTUALMETHODV(jdouble, Double, T_DOUBLE
1495 , HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1496 HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHODV_RETURN())
1497
1498 #define DEFINE_CALLNONVIRTUALMETHODA(ResultType, Result, Tag \
1499 , EntryProbe, ReturnProbe) \
1500 \
1501 DT_RETURN_MARK_DECL_FOR(Result, CallNonvirtual##Result##MethodA, ResultType \
1502 , ReturnProbe);\
1503 \
1504 JNI_ENTRY(ResultType, \
1505 jni_CallNonvirtual##Result##MethodA(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, const jvalue *args)) \
1506 \
1507 EntryProbe;\
1508 ResultType ret;\
1509 DT_RETURN_MARK_FOR(Result, CallNonvirtual##Result##MethodA, ResultType, \
1510 (const ResultType&)ret);\
1511 \
1512 JavaValue jvalue(Tag); \
1513 JNI_ArgumentPusherArray ap(methodID, args); \
1514 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_0); \
1515 ret = jvalue.get_##ResultType(); \
1516 return ret;\
1517 JNI_END
1518
1519 // the runtime type of subword integral basic types is integer
1520 DEFINE_CALLNONVIRTUALMETHODA(jboolean, Boolean, T_BOOLEAN
1521 , HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1522 HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHODA_RETURN(_ret_ref))
1523 DEFINE_CALLNONVIRTUALMETHODA(jbyte, Byte, T_BYTE
1524 , HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1525 HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHODA_RETURN(_ret_ref))
1526 DEFINE_CALLNONVIRTUALMETHODA(jchar, Char, T_CHAR
1527 , HOTSPOT_JNI_CALLNONVIRTUALCHARMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1528 HOTSPOT_JNI_CALLNONVIRTUALCHARMETHODA_RETURN(_ret_ref))
1529 DEFINE_CALLNONVIRTUALMETHODA(jshort, Short, T_SHORT
1530 , HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1531 HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHODA_RETURN(_ret_ref))
1532
1533 DEFINE_CALLNONVIRTUALMETHODA(jobject, Object, T_OBJECT
1534 , HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1535 HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHODA_RETURN(_ret_ref))
1536 DEFINE_CALLNONVIRTUALMETHODA(jint, Int, T_INT
1537 , HOTSPOT_JNI_CALLNONVIRTUALINTMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1538 HOTSPOT_JNI_CALLNONVIRTUALINTMETHODA_RETURN(_ret_ref))
1539 DEFINE_CALLNONVIRTUALMETHODA(jlong, Long, T_LONG
1540 , HOTSPOT_JNI_CALLNONVIRTUALLONGMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1541 // Float and double probes don't return value because dtrace doesn't currently support it
1542 HOTSPOT_JNI_CALLNONVIRTUALLONGMETHODA_RETURN(_ret_ref))
1543 DEFINE_CALLNONVIRTUALMETHODA(jfloat, Float, T_FLOAT
1544 , HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1545 HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHODA_RETURN())
1546 DEFINE_CALLNONVIRTUALMETHODA(jdouble, Double, T_DOUBLE
1547 , HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1548 HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHODA_RETURN())
1549
1550 DT_VOID_RETURN_MARK_DECL(CallNonvirtualVoidMethod
1551 , HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHOD_RETURN());
1552 DT_VOID_RETURN_MARK_DECL(CallNonvirtualVoidMethodV
1553 , HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHODV_RETURN());
1554 DT_VOID_RETURN_MARK_DECL(CallNonvirtualVoidMethodA
1555 , HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHODA_RETURN());
1556
1557 JNI_ENTRY(void, jni_CallNonvirtualVoidMethod(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, ...))
1558 HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHOD_ENTRY(env, obj, cls, (uintptr_t) methodID);
1559 DT_VOID_RETURN_MARK(CallNonvirtualVoidMethod);
1560
1561 va_list args;
1562 va_start(args, methodID);
1563 JavaValue jvalue(T_VOID);
1564 JNI_ArgumentPusherVaArg ap(methodID, args);
1565 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK);
1566 va_end(args);
1567 JNI_END
1568
1569
1570 JNI_ENTRY(void, jni_CallNonvirtualVoidMethodV(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, va_list args))
1571 HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHODV_ENTRY(
1572 env, obj, cls, (uintptr_t) methodID);
1573 DT_VOID_RETURN_MARK(CallNonvirtualVoidMethodV);
1574
1575 JavaValue jvalue(T_VOID);
1576 JNI_ArgumentPusherVaArg ap(methodID, args);
1577 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK);
1578 JNI_END
1579
1580
1581 JNI_ENTRY(void, jni_CallNonvirtualVoidMethodA(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, const jvalue *args))
1582 HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHODA_ENTRY(
1583 env, obj, cls, (uintptr_t) methodID);
1584 DT_VOID_RETURN_MARK(CallNonvirtualVoidMethodA);
1585 JavaValue jvalue(T_VOID);
1586 JNI_ArgumentPusherArray ap(methodID, args);
1587 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK);
1588 JNI_END
1589
1590
1591
1592 #define DEFINE_CALLSTATICMETHOD(ResultType, Result, Tag \
1593 , EntryProbe, ResultProbe) \
1594 \
1595 DT_RETURN_MARK_DECL_FOR(Result, CallStatic##Result##Method, ResultType \
1596 , ResultProbe); \
1597 \
1598 JNI_ENTRY(ResultType, \
1599 jni_CallStatic##Result##Method(JNIEnv *env, jclass cls, jmethodID methodID, ...)) \
1600 \
1601 EntryProbe; \
1602 ResultType ret = 0;\
1603 DT_RETURN_MARK_FOR(Result, CallStatic##Result##Method, ResultType, \
1604 (const ResultType&)ret);\
1605 \
1606 va_list args; \
1607 va_start(args, methodID); \
1608 JavaValue jvalue(Tag); \
1609 JNI_ArgumentPusherVaArg ap(methodID, args); \
1610 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK_0); \
1611 va_end(args); \
1612 ret = jvalue.get_##ResultType(); \
1613 return ret;\
1614 JNI_END
1615
1616 // the runtime type of subword integral basic types is integer
1617 DEFINE_CALLSTATICMETHOD(jboolean, Boolean, T_BOOLEAN
1618 , HOTSPOT_JNI_CALLSTATICBOOLEANMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1619 HOTSPOT_JNI_CALLSTATICBOOLEANMETHOD_RETURN(_ret_ref));
1620 DEFINE_CALLSTATICMETHOD(jbyte, Byte, T_BYTE
1621 , HOTSPOT_JNI_CALLSTATICBYTEMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1622 HOTSPOT_JNI_CALLSTATICBYTEMETHOD_RETURN(_ret_ref));
1623 DEFINE_CALLSTATICMETHOD(jchar, Char, T_CHAR
1624 , HOTSPOT_JNI_CALLSTATICCHARMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1625 HOTSPOT_JNI_CALLSTATICCHARMETHOD_RETURN(_ret_ref));
1626 DEFINE_CALLSTATICMETHOD(jshort, Short, T_SHORT
1627 , HOTSPOT_JNI_CALLSTATICSHORTMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1628 HOTSPOT_JNI_CALLSTATICSHORTMETHOD_RETURN(_ret_ref));
1629
1630 DEFINE_CALLSTATICMETHOD(jobject, Object, T_OBJECT
1631 , HOTSPOT_JNI_CALLSTATICOBJECTMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1632 HOTSPOT_JNI_CALLSTATICOBJECTMETHOD_RETURN(_ret_ref));
1633 DEFINE_CALLSTATICMETHOD(jint, Int, T_INT
1634 , HOTSPOT_JNI_CALLSTATICINTMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1635 HOTSPOT_JNI_CALLSTATICINTMETHOD_RETURN(_ret_ref));
1636 DEFINE_CALLSTATICMETHOD(jlong, Long, T_LONG
1637 , HOTSPOT_JNI_CALLSTATICLONGMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1638 HOTSPOT_JNI_CALLSTATICLONGMETHOD_RETURN(_ret_ref));
1639 // Float and double probes don't return value because dtrace doesn't currently support it
1640 DEFINE_CALLSTATICMETHOD(jfloat, Float, T_FLOAT
1641 , HOTSPOT_JNI_CALLSTATICFLOATMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1642 HOTSPOT_JNI_CALLSTATICFLOATMETHOD_RETURN());
1643 DEFINE_CALLSTATICMETHOD(jdouble, Double, T_DOUBLE
1644 , HOTSPOT_JNI_CALLSTATICDOUBLEMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1645 HOTSPOT_JNI_CALLSTATICDOUBLEMETHOD_RETURN());
1646
1647 #define DEFINE_CALLSTATICMETHODV(ResultType, Result, Tag \
1648 , EntryProbe, ResultProbe) \
1649 \
1650 DT_RETURN_MARK_DECL_FOR(Result, CallStatic##Result##MethodV, ResultType \
1651 , ResultProbe); \
1652 \
1653 JNI_ENTRY(ResultType, \
1654 jni_CallStatic##Result##MethodV(JNIEnv *env, jclass cls, jmethodID methodID, va_list args)) \
1655 \
1656 EntryProbe; \
1657 ResultType ret = 0;\
1658 DT_RETURN_MARK_FOR(Result, CallStatic##Result##MethodV, ResultType, \
1659 (const ResultType&)ret);\
1660 \
1661 JavaValue jvalue(Tag); \
1662 JNI_ArgumentPusherVaArg ap(methodID, args); \
1663 /* Make sure class is initialized before trying to invoke its method */ \
1664 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); \
1665 k->initialize(CHECK_0); \
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_CALLSTATICMETHODV(jboolean, Boolean, T_BOOLEAN
1674 , HOTSPOT_JNI_CALLSTATICBOOLEANMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1675 HOTSPOT_JNI_CALLSTATICBOOLEANMETHODV_RETURN(_ret_ref));
1676 DEFINE_CALLSTATICMETHODV(jbyte, Byte, T_BYTE
1677 , HOTSPOT_JNI_CALLSTATICBYTEMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1678 HOTSPOT_JNI_CALLSTATICBYTEMETHODV_RETURN(_ret_ref));
1679 DEFINE_CALLSTATICMETHODV(jchar, Char, T_CHAR
1680 , HOTSPOT_JNI_CALLSTATICCHARMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1681 HOTSPOT_JNI_CALLSTATICCHARMETHODV_RETURN(_ret_ref));
1682 DEFINE_CALLSTATICMETHODV(jshort, Short, T_SHORT
1683 , HOTSPOT_JNI_CALLSTATICSHORTMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1684 HOTSPOT_JNI_CALLSTATICSHORTMETHODV_RETURN(_ret_ref));
1685
1686 DEFINE_CALLSTATICMETHODV(jobject, Object, T_OBJECT
1687 , HOTSPOT_JNI_CALLSTATICOBJECTMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1688 HOTSPOT_JNI_CALLSTATICOBJECTMETHODV_RETURN(_ret_ref));
1689 DEFINE_CALLSTATICMETHODV(jint, Int, T_INT
1690 , HOTSPOT_JNI_CALLSTATICINTMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1691 HOTSPOT_JNI_CALLSTATICINTMETHODV_RETURN(_ret_ref));
1692 DEFINE_CALLSTATICMETHODV(jlong, Long, T_LONG
1693 , HOTSPOT_JNI_CALLSTATICLONGMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1694 HOTSPOT_JNI_CALLSTATICLONGMETHODV_RETURN(_ret_ref));
1695 // Float and double probes don't return value because dtrace doesn't currently support it
1696 DEFINE_CALLSTATICMETHODV(jfloat, Float, T_FLOAT
1697 , HOTSPOT_JNI_CALLSTATICFLOATMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1698 HOTSPOT_JNI_CALLSTATICFLOATMETHODV_RETURN());
1699 DEFINE_CALLSTATICMETHODV(jdouble, Double, T_DOUBLE
1700 , HOTSPOT_JNI_CALLSTATICDOUBLEMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1701 HOTSPOT_JNI_CALLSTATICDOUBLEMETHODV_RETURN());
1702
1703 #define DEFINE_CALLSTATICMETHODA(ResultType, Result, Tag \
1704 , EntryProbe, ResultProbe) \
1705 \
1706 DT_RETURN_MARK_DECL_FOR(Result, CallStatic##Result##MethodA, ResultType \
1707 , ResultProbe); \
1708 \
1709 JNI_ENTRY(ResultType, \
1710 jni_CallStatic##Result##MethodA(JNIEnv *env, jclass cls, jmethodID methodID, const jvalue *args)) \
1711 \
1712 EntryProbe; \
1713 ResultType ret = 0;\
1714 DT_RETURN_MARK_FOR(Result, CallStatic##Result##MethodA, ResultType, \
1715 (const ResultType&)ret);\
1716 \
1717 JavaValue jvalue(Tag); \
1718 JNI_ArgumentPusherArray ap(methodID, args); \
1719 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK_0); \
1720 ret = jvalue.get_##ResultType(); \
1721 return ret;\
1722 JNI_END
1723
1724 // the runtime type of subword integral basic types is integer
1725 DEFINE_CALLSTATICMETHODA(jboolean, Boolean, T_BOOLEAN
1726 , HOTSPOT_JNI_CALLSTATICBOOLEANMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1727 HOTSPOT_JNI_CALLSTATICBOOLEANMETHODA_RETURN(_ret_ref));
1728 DEFINE_CALLSTATICMETHODA(jbyte, Byte, T_BYTE
1729 , HOTSPOT_JNI_CALLSTATICBYTEMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1730 HOTSPOT_JNI_CALLSTATICBYTEMETHODA_RETURN(_ret_ref));
1731 DEFINE_CALLSTATICMETHODA(jchar, Char, T_CHAR
1732 , HOTSPOT_JNI_CALLSTATICCHARMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1733 HOTSPOT_JNI_CALLSTATICCHARMETHODA_RETURN(_ret_ref));
1734 DEFINE_CALLSTATICMETHODA(jshort, Short, T_SHORT
1735 , HOTSPOT_JNI_CALLSTATICSHORTMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1736 HOTSPOT_JNI_CALLSTATICSHORTMETHODA_RETURN(_ret_ref));
1737
1738 DEFINE_CALLSTATICMETHODA(jobject, Object, T_OBJECT
1739 , HOTSPOT_JNI_CALLSTATICOBJECTMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1740 HOTSPOT_JNI_CALLSTATICOBJECTMETHODA_RETURN(_ret_ref));
1741 DEFINE_CALLSTATICMETHODA(jint, Int, T_INT
1742 , HOTSPOT_JNI_CALLSTATICINTMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1743 HOTSPOT_JNI_CALLSTATICINTMETHODA_RETURN(_ret_ref));
1744 DEFINE_CALLSTATICMETHODA(jlong, Long, T_LONG
1745 , HOTSPOT_JNI_CALLSTATICLONGMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1746 HOTSPOT_JNI_CALLSTATICLONGMETHODA_RETURN(_ret_ref));
1747 // Float and double probes don't return value because dtrace doesn't currently support it
1748 DEFINE_CALLSTATICMETHODA(jfloat, Float, T_FLOAT
1749 , HOTSPOT_JNI_CALLSTATICFLOATMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1750 HOTSPOT_JNI_CALLSTATICFLOATMETHODA_RETURN());
1751 DEFINE_CALLSTATICMETHODA(jdouble, Double, T_DOUBLE
1752 , HOTSPOT_JNI_CALLSTATICDOUBLEMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1753 HOTSPOT_JNI_CALLSTATICDOUBLEMETHODA_RETURN());
1754
1755 DT_VOID_RETURN_MARK_DECL(CallStaticVoidMethod
1756 , HOTSPOT_JNI_CALLSTATICVOIDMETHOD_RETURN());
1757 DT_VOID_RETURN_MARK_DECL(CallStaticVoidMethodV
1758 , HOTSPOT_JNI_CALLSTATICVOIDMETHODV_RETURN());
1759 DT_VOID_RETURN_MARK_DECL(CallStaticVoidMethodA
1760 , HOTSPOT_JNI_CALLSTATICVOIDMETHODA_RETURN());
1761
1762 JNI_ENTRY(void, jni_CallStaticVoidMethod(JNIEnv *env, jclass cls, jmethodID methodID, ...))
1763 HOTSPOT_JNI_CALLSTATICVOIDMETHOD_ENTRY(env, cls, (uintptr_t) methodID);
1764 DT_VOID_RETURN_MARK(CallStaticVoidMethod);
1765
1766 va_list args;
1767 va_start(args, methodID);
1768 JavaValue jvalue(T_VOID);
1769 JNI_ArgumentPusherVaArg ap(methodID, args);
1770 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK);
1771 va_end(args);
1772 JNI_END
1773
1774
1775 JNI_ENTRY(void, jni_CallStaticVoidMethodV(JNIEnv *env, jclass cls, jmethodID methodID, va_list args))
1776 HOTSPOT_JNI_CALLSTATICVOIDMETHODV_ENTRY(env, cls, (uintptr_t) methodID);
1777 DT_VOID_RETURN_MARK(CallStaticVoidMethodV);
1778
1779 JavaValue jvalue(T_VOID);
1780 JNI_ArgumentPusherVaArg ap(methodID, args);
1781 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK);
1782 JNI_END
1783
1784
1785 JNI_ENTRY(void, jni_CallStaticVoidMethodA(JNIEnv *env, jclass cls, jmethodID methodID, const jvalue *args))
1786 HOTSPOT_JNI_CALLSTATICVOIDMETHODA_ENTRY(env, cls, (uintptr_t) methodID);
1787 DT_VOID_RETURN_MARK(CallStaticVoidMethodA);
1788
1789 JavaValue jvalue(T_VOID);
1790 JNI_ArgumentPusherArray ap(methodID, args);
1791 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK);
1792 JNI_END
1793
1794
1795 //
1796 // Accessing Fields
1797 //
1798
1799
1800 DT_RETURN_MARK_DECL(GetFieldID, jfieldID
1801 , HOTSPOT_JNI_GETFIELDID_RETURN((uintptr_t)_ret_ref));
1802
1803 JNI_ENTRY(jfieldID, jni_GetFieldID(JNIEnv *env, jclass clazz,
1804 const char *name, const char *sig))
1805 HOTSPOT_JNI_GETFIELDID_ENTRY(env, clazz, (char *) name, (char *) sig);
1806 jfieldID ret = 0;
1807 DT_RETURN_MARK(GetFieldID, jfieldID, (const jfieldID&)ret);
1808
1809 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz));
1810
1811 // The class should have been loaded (we have an instance of the class
1812 // passed in) so the field and signature should already be in the symbol
1813 // table. If they're not there, the field doesn't exist.
1814 TempNewSymbol fieldname = SymbolTable::probe(name, (int)strlen(name));
1815 TempNewSymbol signame = SymbolTable::probe(sig, (int)strlen(sig));
1816 if (fieldname == NULL || signame == NULL) {
1817 ResourceMark rm;
1818 THROW_MSG_0(vmSymbols::java_lang_NoSuchFieldError(), err_msg("%s.%s %s", k->external_name(), name, sig));
1819 }
1820
1821 // Make sure class is initialized before handing id's out to fields
1822 k->initialize(CHECK_NULL);
1823
1824 fieldDescriptor fd;
1825 if (!k->is_instance_klass() ||
1826 !InstanceKlass::cast(k)->find_field(fieldname, signame, false, &fd)) {
1827 ResourceMark rm;
1828 THROW_MSG_0(vmSymbols::java_lang_NoSuchFieldError(), err_msg("%s.%s %s", k->external_name(), name, sig));
1829 }
1830
1831 // A jfieldID for a non-static field is simply the offset of the field within the instanceOop
1832 // It may also have hash bits for k, if VerifyJNIFields is turned on.
1833 ret = jfieldIDWorkaround::to_instance_jfieldID(k, fd.offset(), fd.is_inlined());
1834 return ret;
1835 JNI_END
1836
1837
1838 JNI_ENTRY(jobject, jni_GetObjectField(JNIEnv *env, jobject obj, jfieldID fieldID))
1839 HOTSPOT_JNI_GETOBJECTFIELD_ENTRY(env, obj, (uintptr_t) fieldID);
1840 oop o = JNIHandles::resolve_non_null(obj);
1841 Klass* k = o->klass();
1842 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID);
1843 oop res = NULL;
1844 // Keep JVMTI addition small and only check enabled flag here.
1845 // jni_GetField_probe() assumes that is okay to create handles.
1846 if (JvmtiExport::should_post_field_access()) {
1847 o = JvmtiExport::jni_GetField_probe(thread, obj, o, k, fieldID, false);
1848 }
1849 if (!jfieldIDWorkaround::is_inlined_jfieldID(fieldID)) {
1850 res = HeapAccess<ON_UNKNOWN_OOP_REF>::oop_load_at(o, offset);
1851 } else {
1852 assert(k->is_instance_klass(), "Only instance can have inlined fields");
1853 InstanceKlass* ik = InstanceKlass::cast(k);
1854 fieldDescriptor fd;
1855 ik->find_field_from_offset(offset, false, &fd); // performance bottleneck
1856 InstanceKlass* holder = fd.field_holder();
1857 InlineKlass* field_vklass = InlineKlass::cast(holder->get_inline_type_field_klass(fd.index()));
1858 res = field_vklass->read_inlined_field(o, ik->field_offset(fd.index()), CHECK_NULL);
1859 }
1860 jobject ret = JNIHandles::make_local(THREAD, res);
1861 HOTSPOT_JNI_GETOBJECTFIELD_RETURN(ret);
1862 return ret;
1863 JNI_END
1864
1865
1866
1867 #define DEFINE_GETFIELD(Return,Fieldname,Result \
1868 , EntryProbe, ReturnProbe) \
1869 \
1870 DT_RETURN_MARK_DECL_FOR(Result, Get##Result##Field, Return \
1871 , ReturnProbe); \
1872 \
1873 JNI_ENTRY_NO_PRESERVE(Return, jni_Get##Result##Field(JNIEnv *env, jobject obj, jfieldID fieldID)) \
1874 \
1875 EntryProbe; \
1876 Return ret = 0;\
1877 DT_RETURN_MARK_FOR(Result, Get##Result##Field, Return, (const Return&)ret);\
1878 \
1879 oop o = JNIHandles::resolve_non_null(obj); \
1880 Klass* k = o->klass(); \
1881 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID); \
1882 /* Keep JVMTI addition small and only check enabled flag here. */ \
1883 if (JvmtiExport::should_post_field_access()) { \
1884 o = JvmtiExport::jni_GetField_probe(thread, obj, o, k, fieldID, false); \
1885 } \
1886 ret = o->Fieldname##_field(offset); \
1887 return ret; \
1888 JNI_END
1889
1890 DEFINE_GETFIELD(jboolean, bool, Boolean
1891 , HOTSPOT_JNI_GETBOOLEANFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
1892 HOTSPOT_JNI_GETBOOLEANFIELD_RETURN(_ret_ref))
1893 DEFINE_GETFIELD(jbyte, byte, Byte
1894 , HOTSPOT_JNI_GETBYTEFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
1895 HOTSPOT_JNI_GETBYTEFIELD_RETURN(_ret_ref))
1896 DEFINE_GETFIELD(jchar, char, Char
1897 , HOTSPOT_JNI_GETCHARFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
1898 HOTSPOT_JNI_GETCHARFIELD_RETURN(_ret_ref))
1899 DEFINE_GETFIELD(jshort, short, Short
1900 , HOTSPOT_JNI_GETSHORTFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
1901 HOTSPOT_JNI_GETSHORTFIELD_RETURN(_ret_ref))
1902 DEFINE_GETFIELD(jint, int, Int
1903 , HOTSPOT_JNI_GETINTFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
1904 HOTSPOT_JNI_GETINTFIELD_RETURN(_ret_ref))
1905 DEFINE_GETFIELD(jlong, long, Long
1906 , HOTSPOT_JNI_GETLONGFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
1907 HOTSPOT_JNI_GETLONGFIELD_RETURN(_ret_ref))
1908 // Float and double probes don't return value because dtrace doesn't currently support it
1909 DEFINE_GETFIELD(jfloat, float, Float
1910 , HOTSPOT_JNI_GETFLOATFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
1911 HOTSPOT_JNI_GETFLOATFIELD_RETURN())
1912 DEFINE_GETFIELD(jdouble, double, Double
1913 , HOTSPOT_JNI_GETDOUBLEFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
1914 HOTSPOT_JNI_GETDOUBLEFIELD_RETURN())
1915
1916 address jni_GetBooleanField_addr() {
1917 return (address)jni_GetBooleanField;
1918 }
1919 address jni_GetByteField_addr() {
1920 return (address)jni_GetByteField;
1921 }
1922 address jni_GetCharField_addr() {
1923 return (address)jni_GetCharField;
1924 }
1925 address jni_GetShortField_addr() {
1926 return (address)jni_GetShortField;
1927 }
1928 address jni_GetIntField_addr() {
1929 return (address)jni_GetIntField;
1930 }
1931 address jni_GetLongField_addr() {
1932 return (address)jni_GetLongField;
1933 }
1934 address jni_GetFloatField_addr() {
1935 return (address)jni_GetFloatField;
1936 }
1937 address jni_GetDoubleField_addr() {
1938 return (address)jni_GetDoubleField;
1939 }
1940
1941 JNI_ENTRY_NO_PRESERVE(void, jni_SetObjectField(JNIEnv *env, jobject obj, jfieldID fieldID, jobject value))
1942 HOTSPOT_JNI_SETOBJECTFIELD_ENTRY(env, obj, (uintptr_t) fieldID, value);
1943 oop o = JNIHandles::resolve_non_null(obj);
1944 Klass* k = o->klass();
1945 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID);
1946 // Keep JVMTI addition small and only check enabled flag here.
1947 if (JvmtiExport::should_post_field_modification()) {
1948 jvalue field_value;
1949 field_value.l = value;
1950 o = JvmtiExport::jni_SetField_probe(thread, obj, o, k, fieldID, false, JVM_SIGNATURE_CLASS, (jvalue *)&field_value);
1951 }
1952 if (!jfieldIDWorkaround::is_inlined_jfieldID(fieldID)) {
1953 HeapAccess<ON_UNKNOWN_OOP_REF>::oop_store_at(o, offset, JNIHandles::resolve(value));
1954 } else {
1955 assert(k->is_instance_klass(), "Only instances can have inlined fields");
1956 InstanceKlass* ik = InstanceKlass::cast(k);
1957 fieldDescriptor fd;
1958 ik->find_field_from_offset(offset, false, &fd);
1959 InstanceKlass* holder = fd.field_holder();
1960 InlineKlass* vklass = InlineKlass::cast(holder->get_inline_type_field_klass(fd.index()));
1961 oop v = JNIHandles::resolve_non_null(value);
1962 vklass->write_inlined_field(o, offset, v, CHECK);
1963 }
1964 HOTSPOT_JNI_SETOBJECTFIELD_RETURN();
1965 JNI_END
1966
1967
1968 #define DEFINE_SETFIELD(Argument,Fieldname,Result,SigType,unionType \
1969 , EntryProbe, ReturnProbe) \
1970 \
1971 JNI_ENTRY_NO_PRESERVE(void, jni_Set##Result##Field(JNIEnv *env, jobject obj, jfieldID fieldID, Argument value)) \
1972 \
1973 EntryProbe; \
1974 \
1975 oop o = JNIHandles::resolve_non_null(obj); \
1976 Klass* k = o->klass(); \
1977 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID); \
1978 /* Keep JVMTI addition small and only check enabled flag here. */ \
1979 if (JvmtiExport::should_post_field_modification()) { \
1980 jvalue field_value; \
1981 field_value.unionType = value; \
1982 o = JvmtiExport::jni_SetField_probe(thread, obj, o, k, fieldID, false, SigType, (jvalue *)&field_value); \
1983 } \
1984 if (SigType == JVM_SIGNATURE_BOOLEAN) { value = ((jboolean)value) & 1; } \
1985 o->Fieldname##_field_put(offset, value); \
1986 ReturnProbe; \
1987 JNI_END
1988
1989 DEFINE_SETFIELD(jboolean, bool, Boolean, JVM_SIGNATURE_BOOLEAN, z
1990 , HOTSPOT_JNI_SETBOOLEANFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value),
1991 HOTSPOT_JNI_SETBOOLEANFIELD_RETURN())
1992 DEFINE_SETFIELD(jbyte, byte, Byte, JVM_SIGNATURE_BYTE, b
1993 , HOTSPOT_JNI_SETBYTEFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value),
1994 HOTSPOT_JNI_SETBYTEFIELD_RETURN())
1995 DEFINE_SETFIELD(jchar, char, Char, JVM_SIGNATURE_CHAR, c
1996 , HOTSPOT_JNI_SETCHARFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value),
1997 HOTSPOT_JNI_SETCHARFIELD_RETURN())
1998 DEFINE_SETFIELD(jshort, short, Short, JVM_SIGNATURE_SHORT, s
1999 , HOTSPOT_JNI_SETSHORTFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value),
2000 HOTSPOT_JNI_SETSHORTFIELD_RETURN())
2001 DEFINE_SETFIELD(jint, int, Int, JVM_SIGNATURE_INT, i
2002 , HOTSPOT_JNI_SETINTFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value),
2003 HOTSPOT_JNI_SETINTFIELD_RETURN())
2004 DEFINE_SETFIELD(jlong, long, Long, JVM_SIGNATURE_LONG, j
2005 , HOTSPOT_JNI_SETLONGFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value),
2006 HOTSPOT_JNI_SETLONGFIELD_RETURN())
2007 // Float and double probes don't return value because dtrace doesn't currently support it
2008 DEFINE_SETFIELD(jfloat, float, Float, JVM_SIGNATURE_FLOAT, f
2009 , HOTSPOT_JNI_SETFLOATFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2010 HOTSPOT_JNI_SETFLOATFIELD_RETURN())
2011 DEFINE_SETFIELD(jdouble, double, Double, JVM_SIGNATURE_DOUBLE, d
2012 , HOTSPOT_JNI_SETDOUBLEFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2013 HOTSPOT_JNI_SETDOUBLEFIELD_RETURN())
2014
2015 DT_RETURN_MARK_DECL(ToReflectedField, jobject
2016 , HOTSPOT_JNI_TOREFLECTEDFIELD_RETURN(_ret_ref));
2017
2018 JNI_ENTRY(jobject, jni_ToReflectedField(JNIEnv *env, jclass cls, jfieldID fieldID, jboolean isStatic))
2019 HOTSPOT_JNI_TOREFLECTEDFIELD_ENTRY(env, cls, (uintptr_t) fieldID, isStatic);
2020 jobject ret = NULL;
2021 DT_RETURN_MARK(ToReflectedField, jobject, (const jobject&)ret);
2022
2023 fieldDescriptor fd;
2024 bool found = false;
2025 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2026
2027 assert(jfieldIDWorkaround::is_static_jfieldID(fieldID) == (isStatic != 0), "invalid fieldID");
2028
2029 if (isStatic) {
2030 // Static field. The fieldID a JNIid specifying the field holder and the offset within the Klass*.
2031 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID);
2032 assert(id->is_static_field_id(), "invalid static field id");
2033 found = id->find_local_field(&fd);
2034 } else {
2035 // Non-static field. The fieldID is really the offset of the field within the instanceOop.
2036 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID);
2037 found = InstanceKlass::cast(k)->find_field_from_offset(offset, false, &fd);
2038 }
2039 assert(found, "bad fieldID passed into jni_ToReflectedField");
2040 oop reflected = Reflection::new_field(&fd, CHECK_NULL);
2041 ret = JNIHandles::make_local(THREAD, reflected);
2042 return ret;
2043 JNI_END
2044
2045
2046 //
2047 // Accessing Static Fields
2048 //
2049 DT_RETURN_MARK_DECL(GetStaticFieldID, jfieldID
2050 , HOTSPOT_JNI_GETSTATICFIELDID_RETURN((uintptr_t)_ret_ref));
2051
2052 JNI_ENTRY(jfieldID, jni_GetStaticFieldID(JNIEnv *env, jclass clazz,
2053 const char *name, const char *sig))
2054 HOTSPOT_JNI_GETSTATICFIELDID_ENTRY(env, clazz, (char *) name, (char *) sig);
2055 jfieldID ret = NULL;
2056 DT_RETURN_MARK(GetStaticFieldID, jfieldID, (const jfieldID&)ret);
2057
2058 // The class should have been loaded (we have an instance of the class
2059 // passed in) so the field and signature should already be in the symbol
2060 // table. If they're not there, the field doesn't exist.
2061 TempNewSymbol fieldname = SymbolTable::probe(name, (int)strlen(name));
2062 TempNewSymbol signame = SymbolTable::probe(sig, (int)strlen(sig));
2063 if (fieldname == NULL || signame == NULL) {
2064 THROW_MSG_0(vmSymbols::java_lang_NoSuchFieldError(), (char*) name);
2065 }
2066 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz));
2067 // Make sure class is initialized before handing id's out to static fields
2068 k->initialize(CHECK_NULL);
2069
2070 fieldDescriptor fd;
2071 if (!k->is_instance_klass() ||
2072 !InstanceKlass::cast(k)->find_field(fieldname, signame, true, &fd)) {
2073 THROW_MSG_0(vmSymbols::java_lang_NoSuchFieldError(), (char*) name);
2074 }
2075
2076 // A jfieldID for a static field is a JNIid specifying the field holder and the offset within the Klass*
2077 JNIid* id = fd.field_holder()->jni_id_for(fd.offset());
2078 debug_only(id->set_is_static_field_id();)
2079
2080 debug_only(id->verify(fd.field_holder()));
2081
2082 ret = jfieldIDWorkaround::to_static_jfieldID(id);
2083 return ret;
2084 JNI_END
2085
2086
2087 JNI_ENTRY(jobject, jni_GetStaticObjectField(JNIEnv *env, jclass clazz, jfieldID fieldID))
2088 HOTSPOT_JNI_GETSTATICOBJECTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID);
2089 #if INCLUDE_JNI_CHECK
2090 DEBUG_ONLY(Klass* param_k = jniCheck::validate_class(thread, clazz);)
2091 #endif // INCLUDE_JNI_CHECK
2092 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID);
2093 assert(id->is_static_field_id(), "invalid static field id");
2094 // Keep JVMTI addition small and only check enabled flag here.
2095 // jni_GetField_probe() assumes that is okay to create handles.
2096 if (JvmtiExport::should_post_field_access()) {
2097 JvmtiExport::jni_GetField_probe(thread, NULL, NULL, id->holder(), fieldID, true);
2098 }
2099 jobject ret = JNIHandles::make_local(THREAD, id->holder()->java_mirror()->obj_field(id->offset()));
2100 HOTSPOT_JNI_GETSTATICOBJECTFIELD_RETURN(ret);
2101 return ret;
2102 JNI_END
2103
2104
2105 #define DEFINE_GETSTATICFIELD(Return,Fieldname,Result \
2106 , EntryProbe, ReturnProbe) \
2107 \
2108 DT_RETURN_MARK_DECL_FOR(Result, GetStatic##Result##Field, Return \
2109 , ReturnProbe); \
2110 \
2111 JNI_ENTRY(Return, jni_GetStatic##Result##Field(JNIEnv *env, jclass clazz, jfieldID fieldID)) \
2112 EntryProbe; \
2113 Return ret = 0;\
2114 DT_RETURN_MARK_FOR(Result, GetStatic##Result##Field, Return, \
2115 (const Return&)ret);\
2116 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID); \
2117 assert(id->is_static_field_id(), "invalid static field id"); \
2118 /* Keep JVMTI addition small and only check enabled flag here. */ \
2119 /* jni_GetField_probe() assumes that is okay to create handles. */ \
2120 if (JvmtiExport::should_post_field_access()) { \
2121 JvmtiExport::jni_GetField_probe(thread, NULL, NULL, id->holder(), fieldID, true); \
2122 } \
2123 ret = id->holder()->java_mirror()-> Fieldname##_field (id->offset()); \
2124 return ret;\
2125 JNI_END
2126
2127 DEFINE_GETSTATICFIELD(jboolean, bool, Boolean
2128 , HOTSPOT_JNI_GETSTATICBOOLEANFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICBOOLEANFIELD_RETURN(_ret_ref))
2129 DEFINE_GETSTATICFIELD(jbyte, byte, Byte
2130 , HOTSPOT_JNI_GETSTATICBYTEFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICBYTEFIELD_RETURN(_ret_ref) )
2131 DEFINE_GETSTATICFIELD(jchar, char, Char
2132 , HOTSPOT_JNI_GETSTATICCHARFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICCHARFIELD_RETURN(_ret_ref) )
2133 DEFINE_GETSTATICFIELD(jshort, short, Short
2134 , HOTSPOT_JNI_GETSTATICSHORTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICSHORTFIELD_RETURN(_ret_ref) )
2135 DEFINE_GETSTATICFIELD(jint, int, Int
2136 , HOTSPOT_JNI_GETSTATICINTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICINTFIELD_RETURN(_ret_ref) )
2137 DEFINE_GETSTATICFIELD(jlong, long, Long
2138 , HOTSPOT_JNI_GETSTATICLONGFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICLONGFIELD_RETURN(_ret_ref) )
2139 // Float and double probes don't return value because dtrace doesn't currently support it
2140 DEFINE_GETSTATICFIELD(jfloat, float, Float
2141 , HOTSPOT_JNI_GETSTATICFLOATFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICFLOATFIELD_RETURN() )
2142 DEFINE_GETSTATICFIELD(jdouble, double, Double
2143 , HOTSPOT_JNI_GETSTATICDOUBLEFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICDOUBLEFIELD_RETURN() )
2144
2145 JNI_ENTRY(void, jni_SetStaticObjectField(JNIEnv *env, jclass clazz, jfieldID fieldID, jobject value))
2146 HOTSPOT_JNI_SETSTATICOBJECTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value);
2147 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID);
2148 assert(id->is_static_field_id(), "invalid static field id");
2149 // Keep JVMTI addition small and only check enabled flag here.
2150 // jni_SetField_probe() assumes that is okay to create handles.
2151 if (JvmtiExport::should_post_field_modification()) {
2152 jvalue field_value;
2153 field_value.l = value;
2154 JvmtiExport::jni_SetField_probe(thread, NULL, NULL, id->holder(), fieldID, true, JVM_SIGNATURE_CLASS, (jvalue *)&field_value);
2155 }
2156 id->holder()->java_mirror()->obj_field_put(id->offset(), JNIHandles::resolve(value));
2157 HOTSPOT_JNI_SETSTATICOBJECTFIELD_RETURN();
2158 JNI_END
2159
2160
2161
2162 #define DEFINE_SETSTATICFIELD(Argument,Fieldname,Result,SigType,unionType \
2163 , EntryProbe, ReturnProbe) \
2164 \
2165 JNI_ENTRY(void, jni_SetStatic##Result##Field(JNIEnv *env, jclass clazz, jfieldID fieldID, Argument value)) \
2166 EntryProbe; \
2167 \
2168 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID); \
2169 assert(id->is_static_field_id(), "invalid static field id"); \
2170 /* Keep JVMTI addition small and only check enabled flag here. */ \
2171 /* jni_SetField_probe() assumes that is okay to create handles. */ \
2172 if (JvmtiExport::should_post_field_modification()) { \
2173 jvalue field_value; \
2174 field_value.unionType = value; \
2175 JvmtiExport::jni_SetField_probe(thread, NULL, NULL, id->holder(), fieldID, true, SigType, (jvalue *)&field_value); \
2176 } \
2177 if (SigType == JVM_SIGNATURE_BOOLEAN) { value = ((jboolean)value) & 1; } \
2178 id->holder()->java_mirror()-> Fieldname##_field_put (id->offset(), value); \
2179 ReturnProbe;\
2180 JNI_END
2181
2182 DEFINE_SETSTATICFIELD(jboolean, bool, Boolean, JVM_SIGNATURE_BOOLEAN, z
2183 , HOTSPOT_JNI_SETSTATICBOOLEANFIELD_ENTRY(env, clazz, (uintptr_t)fieldID, value),
2184 HOTSPOT_JNI_SETSTATICBOOLEANFIELD_RETURN())
2185 DEFINE_SETSTATICFIELD(jbyte, byte, Byte, JVM_SIGNATURE_BYTE, b
2186 , HOTSPOT_JNI_SETSTATICBYTEFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value),
2187 HOTSPOT_JNI_SETSTATICBYTEFIELD_RETURN())
2188 DEFINE_SETSTATICFIELD(jchar, char, Char, JVM_SIGNATURE_CHAR, c
2189 , HOTSPOT_JNI_SETSTATICCHARFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value),
2190 HOTSPOT_JNI_SETSTATICCHARFIELD_RETURN())
2191 DEFINE_SETSTATICFIELD(jshort, short, Short, JVM_SIGNATURE_SHORT, s
2192 , HOTSPOT_JNI_SETSTATICSHORTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value),
2193 HOTSPOT_JNI_SETSTATICSHORTFIELD_RETURN())
2194 DEFINE_SETSTATICFIELD(jint, int, Int, JVM_SIGNATURE_INT, i
2195 , HOTSPOT_JNI_SETSTATICINTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value),
2196 HOTSPOT_JNI_SETSTATICINTFIELD_RETURN())
2197 DEFINE_SETSTATICFIELD(jlong, long, Long, JVM_SIGNATURE_LONG, j
2198 , HOTSPOT_JNI_SETSTATICLONGFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value),
2199 HOTSPOT_JNI_SETSTATICLONGFIELD_RETURN())
2200 // Float and double probes don't return value because dtrace doesn't currently support it
2201 DEFINE_SETSTATICFIELD(jfloat, float, Float, JVM_SIGNATURE_FLOAT, f
2202 , HOTSPOT_JNI_SETSTATICFLOATFIELD_ENTRY(env, clazz, (uintptr_t) fieldID),
2203 HOTSPOT_JNI_SETSTATICFLOATFIELD_RETURN())
2204 DEFINE_SETSTATICFIELD(jdouble, double, Double, JVM_SIGNATURE_DOUBLE, d
2205 , HOTSPOT_JNI_SETSTATICDOUBLEFIELD_ENTRY(env, clazz, (uintptr_t) fieldID),
2206 HOTSPOT_JNI_SETSTATICDOUBLEFIELD_RETURN())
2207
2208 //
2209 // String Operations
2210 //
2211
2212 // Unicode Interface
2213
2214 DT_RETURN_MARK_DECL(NewString, jstring
2215 , HOTSPOT_JNI_NEWSTRING_RETURN(_ret_ref));
2216
2217 JNI_ENTRY(jstring, jni_NewString(JNIEnv *env, const jchar *unicodeChars, jsize len))
2218 HOTSPOT_JNI_NEWSTRING_ENTRY(env, (uint16_t *) unicodeChars, len);
2219 jstring ret = NULL;
2220 DT_RETURN_MARK(NewString, jstring, (const jstring&)ret);
2221 oop string=java_lang_String::create_oop_from_unicode((jchar*) unicodeChars, len, CHECK_NULL);
2222 ret = (jstring) JNIHandles::make_local(THREAD, string);
2223 return ret;
2224 JNI_END
2225
2226
2227 JNI_ENTRY_NO_PRESERVE(jsize, jni_GetStringLength(JNIEnv *env, jstring string))
2228 HOTSPOT_JNI_GETSTRINGLENGTH_ENTRY(env, string);
2229 jsize ret = 0;
2230 oop s = JNIHandles::resolve_non_null(string);
2231 ret = java_lang_String::length(s);
2232 HOTSPOT_JNI_GETSTRINGLENGTH_RETURN(ret);
2233 return ret;
2234 JNI_END
2235
2236
2237 JNI_ENTRY_NO_PRESERVE(const jchar*, jni_GetStringChars(
2238 JNIEnv *env, jstring string, jboolean *isCopy))
2239 HOTSPOT_JNI_GETSTRINGCHARS_ENTRY(env, string, (uintptr_t *) isCopy);
2240 jchar* buf = NULL;
2241 oop s = JNIHandles::resolve_non_null(string);
2242 typeArrayOop s_value = java_lang_String::value(s);
2243 if (s_value != NULL) {
2244 int s_len = java_lang_String::length(s, s_value);
2245 bool is_latin1 = java_lang_String::is_latin1(s);
2246 buf = NEW_C_HEAP_ARRAY_RETURN_NULL(jchar, s_len + 1, mtInternal); // add one for zero termination
2247 /* JNI Specification states return NULL on OOM */
2248 if (buf != NULL) {
2249 if (s_len > 0) {
2250 if (!is_latin1) {
2251 ArrayAccess<>::arraycopy_to_native(s_value, (size_t) typeArrayOopDesc::element_offset<jchar>(0),
2252 buf, s_len);
2253 } else {
2254 for (int i = 0; i < s_len; i++) {
2255 buf[i] = ((jchar) s_value->byte_at(i)) & 0xff;
2256 }
2257 }
2258 }
2259 buf[s_len] = 0;
2260 //%note jni_5
2261 if (isCopy != NULL) {
2262 *isCopy = JNI_TRUE;
2263 }
2264 }
2265 }
2266 HOTSPOT_JNI_GETSTRINGCHARS_RETURN(buf);
2267 return buf;
2268 JNI_END
2269
2270
2271 JNI_ENTRY_NO_PRESERVE(void, jni_ReleaseStringChars(JNIEnv *env, jstring str, const jchar *chars))
2272 HOTSPOT_JNI_RELEASESTRINGCHARS_ENTRY(env, str, (uint16_t *) chars);
2273 //%note jni_6
2274 if (chars != NULL) {
2275 // Since String objects are supposed to be immutable, don't copy any
2276 // new data back. A bad user will have to go after the char array.
2277 FreeHeap((void*) chars);
2278 }
2279 HOTSPOT_JNI_RELEASESTRINGCHARS_RETURN();
2280 JNI_END
2281
2282
2283 // UTF Interface
2284
2285 DT_RETURN_MARK_DECL(NewStringUTF, jstring
2286 , HOTSPOT_JNI_NEWSTRINGUTF_RETURN(_ret_ref));
2287
2288 JNI_ENTRY(jstring, jni_NewStringUTF(JNIEnv *env, const char *bytes))
2289 HOTSPOT_JNI_NEWSTRINGUTF_ENTRY(env, (char *) bytes);
2290 jstring ret;
2291 DT_RETURN_MARK(NewStringUTF, jstring, (const jstring&)ret);
2292
2293 oop result = java_lang_String::create_oop_from_str((char*) bytes, CHECK_NULL);
2294 ret = (jstring) JNIHandles::make_local(THREAD, result);
2295 return ret;
2296 JNI_END
2297
2298
2299 JNI_ENTRY(jsize, jni_GetStringUTFLength(JNIEnv *env, jstring string))
2300 HOTSPOT_JNI_GETSTRINGUTFLENGTH_ENTRY(env, string);
2301 oop java_string = JNIHandles::resolve_non_null(string);
2302 jsize ret = java_lang_String::utf8_length(java_string);
2303 HOTSPOT_JNI_GETSTRINGUTFLENGTH_RETURN(ret);
2304 return ret;
2305 JNI_END
2306
2307
2308 JNI_ENTRY(const char*, jni_GetStringUTFChars(JNIEnv *env, jstring string, jboolean *isCopy))
2309 HOTSPOT_JNI_GETSTRINGUTFCHARS_ENTRY(env, string, (uintptr_t *) isCopy);
2310 char* result = NULL;
2311 oop java_string = JNIHandles::resolve_non_null(string);
2312 typeArrayOop s_value = java_lang_String::value(java_string);
2313 if (s_value != NULL) {
2314 size_t length = java_lang_String::utf8_length(java_string, s_value);
2315 /* JNI Specification states return NULL on OOM */
2316 result = AllocateHeap(length + 1, mtInternal, AllocFailStrategy::RETURN_NULL);
2317 if (result != NULL) {
2318 java_lang_String::as_utf8_string(java_string, s_value, result, (int) length + 1);
2319 if (isCopy != NULL) {
2320 *isCopy = JNI_TRUE;
2321 }
2322 }
2323 }
2324 HOTSPOT_JNI_GETSTRINGUTFCHARS_RETURN(result);
2325 return result;
2326 JNI_END
2327
2328
2329 JNI_LEAF(void, jni_ReleaseStringUTFChars(JNIEnv *env, jstring str, const char *chars))
2330 HOTSPOT_JNI_RELEASESTRINGUTFCHARS_ENTRY(env, str, (char *) chars);
2331 if (chars != NULL) {
2332 FreeHeap((char*) chars);
2333 }
2334 HOTSPOT_JNI_RELEASESTRINGUTFCHARS_RETURN();
2335 JNI_END
2336
2337
2338 JNI_ENTRY_NO_PRESERVE(jsize, jni_GetArrayLength(JNIEnv *env, jarray array))
2339 HOTSPOT_JNI_GETARRAYLENGTH_ENTRY(env, array);
2340 arrayOop a = arrayOop(JNIHandles::resolve_non_null(array));
2341 assert(a->is_array(), "must be array");
2342 jsize ret = a->length();
2343 HOTSPOT_JNI_GETARRAYLENGTH_RETURN(ret);
2344 return ret;
2345 JNI_END
2346
2347
2348 //
2349 // Object Array Operations
2350 //
2351
2352 DT_RETURN_MARK_DECL(NewObjectArray, jobjectArray
2353 , HOTSPOT_JNI_NEWOBJECTARRAY_RETURN(_ret_ref));
2354
2355 JNI_ENTRY(jobjectArray, jni_NewObjectArray(JNIEnv *env, jsize length, jclass elementClass, jobject initialElement))
2356 HOTSPOT_JNI_NEWOBJECTARRAY_ENTRY(env, length, elementClass, initialElement);
2357 jobjectArray ret = NULL;
2358 DT_RETURN_MARK(NewObjectArray, jobjectArray, (const jobjectArray&)ret);
2359 Klass* ek = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(elementClass));
2360 Klass* ak = ek->array_klass(CHECK_NULL);
2361 ObjArrayKlass::cast(ak)->initialize(CHECK_NULL);
2362 objArrayOop result = ObjArrayKlass::cast(ak)->allocate(length, CHECK_NULL);
2363 oop initial_value = JNIHandles::resolve(initialElement);
2364 if (initial_value != NULL) { // array already initialized with NULL
2365 for (int index = 0; index < length; index++) {
2366 result->obj_at_put(index, initial_value);
2367 }
2368 }
2369 ret = (jobjectArray) JNIHandles::make_local(THREAD, result);
2370 return ret;
2371 JNI_END
2372
2373 DT_RETURN_MARK_DECL(GetObjectArrayElement, jobject
2374 , HOTSPOT_JNI_GETOBJECTARRAYELEMENT_RETURN(_ret_ref));
2375
2376 JNI_ENTRY(jobject, jni_GetObjectArrayElement(JNIEnv *env, jobjectArray array, jsize index))
2377 HOTSPOT_JNI_GETOBJECTARRAYELEMENT_ENTRY(env, array, index);
2378 jobject ret = NULL;
2379 DT_RETURN_MARK(GetObjectArrayElement, jobject, (const jobject&)ret);
2380 oop res = NULL;
2381 arrayOop arr((arrayOop)JNIHandles::resolve_non_null(array));
2382 if (arr->is_within_bounds(index)) {
2383 if (arr->is_flatArray()) {
2384 flatArrayOop a = flatArrayOop(JNIHandles::resolve_non_null(array));
2385 flatArrayHandle vah(thread, a);
2386 res = flatArrayOopDesc::value_alloc_copy_from_index(vah, index, CHECK_NULL);
2387 assert(res != NULL, "Must be set in one of two paths above");
2388 } else {
2389 assert(arr->is_objArray(), "If not a valueArray. must be an objArray");
2390 objArrayOop a = objArrayOop(JNIHandles::resolve_non_null(array));
2391 res = a->obj_at(index);
2392 }
2393 } else {
2394 ResourceMark rm(THREAD);
2395 stringStream ss;
2396 ss.print("Index %d out of bounds for length %d", index,arr->length());
2397 THROW_MSG_0(vmSymbols::java_lang_ArrayIndexOutOfBoundsException(), ss.as_string());
2398 }
2399 ret = JNIHandles::make_local(THREAD, res);
2400 return ret;
2401 JNI_END
2402
2403 DT_VOID_RETURN_MARK_DECL(SetObjectArrayElement
2404 , HOTSPOT_JNI_SETOBJECTARRAYELEMENT_RETURN());
2405
2406 JNI_ENTRY(void, jni_SetObjectArrayElement(JNIEnv *env, jobjectArray array, jsize index, jobject value))
2407 HOTSPOT_JNI_SETOBJECTARRAYELEMENT_ENTRY(env, array, index, value);
2408 DT_VOID_RETURN_MARK(SetObjectArrayElement);
2409
2410 bool oob = false;
2411 int length = -1;
2412 oop res = NULL;
2413 arrayOop arr((arrayOop)JNIHandles::resolve_non_null(array));
2414 if (arr->is_within_bounds(index)) {
2415 if (arr->is_flatArray()) {
2416 flatArrayOop a = flatArrayOop(JNIHandles::resolve_non_null(array));
2417 oop v = JNIHandles::resolve(value);
2418 FlatArrayKlass* vaklass = FlatArrayKlass::cast(a->klass());
2419 InlineKlass* element_vklass = vaklass->element_klass();
2420 if (v != NULL && v->is_a(element_vklass)) {
2421 a->value_copy_to_index(v, index);
2422 } else {
2423 ResourceMark rm(THREAD);
2424 stringStream ss;
2425 Klass *kl = FlatArrayKlass::cast(a->klass());
2426 ss.print("type mismatch: can not store %s to %s[%d]",
2427 v->klass()->external_name(),
2428 kl->external_name(),
2429 index);
2430 for (int dims = ArrayKlass::cast(a->klass())->dimension(); dims > 1; --dims) {
2431 ss.print("[]");
2432 }
2433 THROW_MSG(vmSymbols::java_lang_ArrayStoreException(), ss.as_string());
2434 }
2435 } else {
2436 assert(arr->is_objArray(), "If not a valueArray. must be an objArray");
2437 objArrayOop a = objArrayOop(JNIHandles::resolve_non_null(array));
2438 oop v = JNIHandles::resolve(value);
2439 if (v == NULL || v->is_a(ObjArrayKlass::cast(a->klass())->element_klass())) {
2440 a->obj_at_put(index, v);
2441 } else {
2442 ResourceMark rm(THREAD);
2443 stringStream ss;
2444 Klass *bottom_kl = ObjArrayKlass::cast(a->klass())->bottom_klass();
2445 ss.print("type mismatch: can not store %s to %s[%d]",
2446 v->klass()->external_name(),
2447 bottom_kl->is_typeArray_klass() ? type2name_tab[ArrayKlass::cast(bottom_kl)->element_type()] : bottom_kl->external_name(),
2448 index);
2449 for (int dims = ArrayKlass::cast(a->klass())->dimension(); dims > 1; --dims) {
2450 ss.print("[]");
2451 }
2452 THROW_MSG(vmSymbols::java_lang_ArrayStoreException(), ss.as_string());
2453 }
2454 }
2455 } else {
2456 ResourceMark rm(THREAD);
2457 stringStream ss;
2458 ss.print("Index %d out of bounds for length %d", index, arr->length());
2459 THROW_MSG(vmSymbols::java_lang_ArrayIndexOutOfBoundsException(), ss.as_string());
2460 }
2461 JNI_END
2462
2463
2464
2465 #define DEFINE_NEWSCALARARRAY(Return,Allocator,Result \
2466 ,EntryProbe,ReturnProbe) \
2467 \
2468 DT_RETURN_MARK_DECL(New##Result##Array, Return \
2469 , ReturnProbe); \
2470 \
2471 JNI_ENTRY(Return, \
2472 jni_New##Result##Array(JNIEnv *env, jsize len)) \
2473 EntryProbe; \
2474 Return ret = NULL;\
2475 DT_RETURN_MARK(New##Result##Array, Return, (const Return&)ret);\
2476 \
2477 oop obj= oopFactory::Allocator(len, CHECK_NULL); \
2478 ret = (Return) JNIHandles::make_local(THREAD, obj); \
2479 return ret;\
2480 JNI_END
2481
2482 DEFINE_NEWSCALARARRAY(jbooleanArray, new_boolArray, Boolean,
2483 HOTSPOT_JNI_NEWBOOLEANARRAY_ENTRY(env, len),
2484 HOTSPOT_JNI_NEWBOOLEANARRAY_RETURN(_ret_ref))
2485 DEFINE_NEWSCALARARRAY(jbyteArray, new_byteArray, Byte,
2486 HOTSPOT_JNI_NEWBYTEARRAY_ENTRY(env, len),
2487 HOTSPOT_JNI_NEWBYTEARRAY_RETURN(_ret_ref))
2488 DEFINE_NEWSCALARARRAY(jshortArray, new_shortArray, Short,
2489 HOTSPOT_JNI_NEWSHORTARRAY_ENTRY(env, len),
2490 HOTSPOT_JNI_NEWSHORTARRAY_RETURN(_ret_ref))
2491 DEFINE_NEWSCALARARRAY(jcharArray, new_charArray, Char,
2492 HOTSPOT_JNI_NEWCHARARRAY_ENTRY(env, len),
2493 HOTSPOT_JNI_NEWCHARARRAY_RETURN(_ret_ref))
2494 DEFINE_NEWSCALARARRAY(jintArray, new_intArray, Int,
2495 HOTSPOT_JNI_NEWINTARRAY_ENTRY(env, len),
2496 HOTSPOT_JNI_NEWINTARRAY_RETURN(_ret_ref))
2497 DEFINE_NEWSCALARARRAY(jlongArray, new_longArray, Long,
2498 HOTSPOT_JNI_NEWLONGARRAY_ENTRY(env, len),
2499 HOTSPOT_JNI_NEWLONGARRAY_RETURN(_ret_ref))
2500 DEFINE_NEWSCALARARRAY(jfloatArray, new_floatArray, Float,
2501 HOTSPOT_JNI_NEWFLOATARRAY_ENTRY(env, len),
2502 HOTSPOT_JNI_NEWFLOATARRAY_RETURN(_ret_ref))
2503 DEFINE_NEWSCALARARRAY(jdoubleArray, new_doubleArray, Double,
2504 HOTSPOT_JNI_NEWDOUBLEARRAY_ENTRY(env, len),
2505 HOTSPOT_JNI_NEWDOUBLEARRAY_RETURN(_ret_ref))
2506
2507 // Return an address which will fault if the caller writes to it.
2508
2509 static char* get_bad_address() {
2510 static char* bad_address = NULL;
2511 if (bad_address == NULL) {
2512 size_t size = os::vm_allocation_granularity();
2513 bad_address = os::reserve_memory(size);
2514 if (bad_address != NULL) {
2515 os::protect_memory(bad_address, size, os::MEM_PROT_READ,
2516 /*is_committed*/false);
2517 MemTracker::record_virtual_memory_type((void*)bad_address, mtInternal);
2518 }
2519 }
2520 return bad_address;
2521 }
2522
2523
2524
2525 #define DEFINE_GETSCALARARRAYELEMENTS(ElementTag,ElementType,Result, Tag \
2526 , EntryProbe, ReturnProbe) \
2527 \
2528 JNI_ENTRY_NO_PRESERVE(ElementType*, \
2529 jni_Get##Result##ArrayElements(JNIEnv *env, ElementType##Array array, jboolean *isCopy)) \
2530 EntryProbe; \
2531 /* allocate an chunk of memory in c land */ \
2532 typeArrayOop a = typeArrayOop(JNIHandles::resolve_non_null(array)); \
2533 ElementType* result; \
2534 int len = a->length(); \
2535 if (len == 0) { \
2536 if (isCopy != NULL) { \
2537 *isCopy = JNI_FALSE; \
2538 } \
2539 /* Empty array: legal but useless, can't return NULL. \
2540 * Return a pointer to something useless. \
2541 * Avoid asserts in typeArrayOop. */ \
2542 result = (ElementType*)get_bad_address(); \
2543 } else { \
2544 /* JNI Specification states return NULL on OOM */ \
2545 result = NEW_C_HEAP_ARRAY_RETURN_NULL(ElementType, len, mtInternal); \
2546 if (result != NULL) { \
2547 /* copy the array to the c chunk */ \
2548 ArrayAccess<>::arraycopy_to_native(a, typeArrayOopDesc::element_offset<ElementType>(0), \
2549 result, len); \
2550 if (isCopy) { \
2551 *isCopy = JNI_TRUE; \
2552 } \
2553 } \
2554 } \
2555 ReturnProbe; \
2556 return result; \
2557 JNI_END
2558
2559 DEFINE_GETSCALARARRAYELEMENTS(T_BOOLEAN, jboolean, Boolean, bool
2560 , HOTSPOT_JNI_GETBOOLEANARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy),
2561 HOTSPOT_JNI_GETBOOLEANARRAYELEMENTS_RETURN((uintptr_t*)result))
2562 DEFINE_GETSCALARARRAYELEMENTS(T_BYTE, jbyte, Byte, byte
2563 , HOTSPOT_JNI_GETBYTEARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy),
2564 HOTSPOT_JNI_GETBYTEARRAYELEMENTS_RETURN((char*)result))
2565 DEFINE_GETSCALARARRAYELEMENTS(T_SHORT, jshort, Short, short
2566 , HOTSPOT_JNI_GETSHORTARRAYELEMENTS_ENTRY(env, (uint16_t*) array, (uintptr_t *) isCopy),
2567 HOTSPOT_JNI_GETSHORTARRAYELEMENTS_RETURN((uint16_t*)result))
2568 DEFINE_GETSCALARARRAYELEMENTS(T_CHAR, jchar, Char, char
2569 , HOTSPOT_JNI_GETCHARARRAYELEMENTS_ENTRY(env, (uint16_t*) array, (uintptr_t *) isCopy),
2570 HOTSPOT_JNI_GETCHARARRAYELEMENTS_RETURN(result))
2571 DEFINE_GETSCALARARRAYELEMENTS(T_INT, jint, Int, int
2572 , HOTSPOT_JNI_GETINTARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy),
2573 HOTSPOT_JNI_GETINTARRAYELEMENTS_RETURN((uint32_t*)result))
2574 DEFINE_GETSCALARARRAYELEMENTS(T_LONG, jlong, Long, long
2575 , HOTSPOT_JNI_GETLONGARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy),
2576 HOTSPOT_JNI_GETLONGARRAYELEMENTS_RETURN(((uintptr_t*)result)))
2577 // Float and double probes don't return value because dtrace doesn't currently support it
2578 DEFINE_GETSCALARARRAYELEMENTS(T_FLOAT, jfloat, Float, float
2579 , HOTSPOT_JNI_GETFLOATARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy),
2580 HOTSPOT_JNI_GETFLOATARRAYELEMENTS_RETURN(result))
2581 DEFINE_GETSCALARARRAYELEMENTS(T_DOUBLE, jdouble, Double, double
2582 , HOTSPOT_JNI_GETDOUBLEARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy),
2583 HOTSPOT_JNI_GETDOUBLEARRAYELEMENTS_RETURN(result))
2584
2585
2586 #define DEFINE_RELEASESCALARARRAYELEMENTS(ElementTag,ElementType,Result,Tag \
2587 , EntryProbe, ReturnProbe);\
2588 \
2589 JNI_ENTRY_NO_PRESERVE(void, \
2590 jni_Release##Result##ArrayElements(JNIEnv *env, ElementType##Array array, \
2591 ElementType *buf, jint mode)) \
2592 EntryProbe; \
2593 typeArrayOop a = typeArrayOop(JNIHandles::resolve_non_null(array)); \
2594 int len = a->length(); \
2595 if (len != 0) { /* Empty array: nothing to free or copy. */ \
2596 if ((mode == 0) || (mode == JNI_COMMIT)) { \
2597 ArrayAccess<>::arraycopy_from_native(buf, a, typeArrayOopDesc::element_offset<ElementType>(0), len); \
2598 } \
2599 if ((mode == 0) || (mode == JNI_ABORT)) { \
2600 FreeHeap(buf); \
2601 } \
2602 } \
2603 ReturnProbe; \
2604 JNI_END
2605
2606 DEFINE_RELEASESCALARARRAYELEMENTS(T_BOOLEAN, jboolean, Boolean, bool
2607 , HOTSPOT_JNI_RELEASEBOOLEANARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) buf, mode),
2608 HOTSPOT_JNI_RELEASEBOOLEANARRAYELEMENTS_RETURN())
2609 DEFINE_RELEASESCALARARRAYELEMENTS(T_BYTE, jbyte, Byte, byte
2610 , HOTSPOT_JNI_RELEASEBYTEARRAYELEMENTS_ENTRY(env, array, (char *) buf, mode),
2611 HOTSPOT_JNI_RELEASEBYTEARRAYELEMENTS_RETURN())
2612 DEFINE_RELEASESCALARARRAYELEMENTS(T_SHORT, jshort, Short, short
2613 , HOTSPOT_JNI_RELEASESHORTARRAYELEMENTS_ENTRY(env, array, (uint16_t *) buf, mode),
2614 HOTSPOT_JNI_RELEASESHORTARRAYELEMENTS_RETURN())
2615 DEFINE_RELEASESCALARARRAYELEMENTS(T_CHAR, jchar, Char, char
2616 , HOTSPOT_JNI_RELEASECHARARRAYELEMENTS_ENTRY(env, array, (uint16_t *) buf, mode),
2617 HOTSPOT_JNI_RELEASECHARARRAYELEMENTS_RETURN())
2618 DEFINE_RELEASESCALARARRAYELEMENTS(T_INT, jint, Int, int
2619 , HOTSPOT_JNI_RELEASEINTARRAYELEMENTS_ENTRY(env, array, (uint32_t *) buf, mode),
2620 HOTSPOT_JNI_RELEASEINTARRAYELEMENTS_RETURN())
2621 DEFINE_RELEASESCALARARRAYELEMENTS(T_LONG, jlong, Long, long
2622 , HOTSPOT_JNI_RELEASELONGARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) buf, mode),
2623 HOTSPOT_JNI_RELEASELONGARRAYELEMENTS_RETURN())
2624 DEFINE_RELEASESCALARARRAYELEMENTS(T_FLOAT, jfloat, Float, float
2625 , HOTSPOT_JNI_RELEASEFLOATARRAYELEMENTS_ENTRY(env, array, (float *) buf, mode),
2626 HOTSPOT_JNI_RELEASEFLOATARRAYELEMENTS_RETURN())
2627 DEFINE_RELEASESCALARARRAYELEMENTS(T_DOUBLE, jdouble, Double, double
2628 , HOTSPOT_JNI_RELEASEDOUBLEARRAYELEMENTS_ENTRY(env, array, (double *) buf, mode),
2629 HOTSPOT_JNI_RELEASEDOUBLEARRAYELEMENTS_RETURN())
2630
2631 static void check_bounds(jsize start, jsize copy_len, jsize array_len, TRAPS) {
2632 ResourceMark rm(THREAD);
2633 if (copy_len < 0) {
2634 stringStream ss;
2635 ss.print("Length %d is negative", copy_len);
2636 THROW_MSG(vmSymbols::java_lang_ArrayIndexOutOfBoundsException(), ss.as_string());
2637 } else if (start < 0 || (start > array_len - copy_len)) {
2638 stringStream ss;
2639 ss.print("Array region %d.." INT64_FORMAT " out of bounds for length %d",
2640 start, (int64_t)start+(int64_t)copy_len, array_len);
2641 THROW_MSG(vmSymbols::java_lang_ArrayIndexOutOfBoundsException(), ss.as_string());
2642 }
2643 }
2644
2645 #define DEFINE_GETSCALARARRAYREGION(ElementTag,ElementType,Result, Tag \
2646 , EntryProbe, ReturnProbe); \
2647 DT_VOID_RETURN_MARK_DECL(Get##Result##ArrayRegion \
2648 , ReturnProbe); \
2649 \
2650 JNI_ENTRY(void, \
2651 jni_Get##Result##ArrayRegion(JNIEnv *env, ElementType##Array array, jsize start, \
2652 jsize len, ElementType *buf)) \
2653 EntryProbe; \
2654 DT_VOID_RETURN_MARK(Get##Result##ArrayRegion); \
2655 typeArrayOop src = typeArrayOop(JNIHandles::resolve_non_null(array)); \
2656 check_bounds(start, len, src->length(), CHECK); \
2657 if (len > 0) { \
2658 ArrayAccess<>::arraycopy_to_native(src, typeArrayOopDesc::element_offset<ElementType>(start), buf, len); \
2659 } \
2660 JNI_END
2661
2662 DEFINE_GETSCALARARRAYREGION(T_BOOLEAN, jboolean,Boolean, bool
2663 , HOTSPOT_JNI_GETBOOLEANARRAYREGION_ENTRY(env, array, start, len, (uintptr_t *) buf),
2664 HOTSPOT_JNI_GETBOOLEANARRAYREGION_RETURN());
2665 DEFINE_GETSCALARARRAYREGION(T_BYTE, jbyte, Byte, byte
2666 , HOTSPOT_JNI_GETBYTEARRAYREGION_ENTRY(env, array, start, len, (char *) buf),
2667 HOTSPOT_JNI_GETBYTEARRAYREGION_RETURN());
2668 DEFINE_GETSCALARARRAYREGION(T_SHORT, jshort, Short, short
2669 , HOTSPOT_JNI_GETSHORTARRAYREGION_ENTRY(env, array, start, len, (uint16_t *) buf),
2670 HOTSPOT_JNI_GETSHORTARRAYREGION_RETURN());
2671 DEFINE_GETSCALARARRAYREGION(T_CHAR, jchar, Char, char
2672 , HOTSPOT_JNI_GETCHARARRAYREGION_ENTRY(env, array, start, len, (uint16_t*) buf),
2673 HOTSPOT_JNI_GETCHARARRAYREGION_RETURN());
2674 DEFINE_GETSCALARARRAYREGION(T_INT, jint, Int, int
2675 , HOTSPOT_JNI_GETINTARRAYREGION_ENTRY(env, array, start, len, (uint32_t*) buf),
2676 HOTSPOT_JNI_GETINTARRAYREGION_RETURN());
2677 DEFINE_GETSCALARARRAYREGION(T_LONG, jlong, Long, long
2678 , HOTSPOT_JNI_GETLONGARRAYREGION_ENTRY(env, array, start, len, (uintptr_t *) buf),
2679 HOTSPOT_JNI_GETLONGARRAYREGION_RETURN());
2680 DEFINE_GETSCALARARRAYREGION(T_FLOAT, jfloat, Float, float
2681 , HOTSPOT_JNI_GETFLOATARRAYREGION_ENTRY(env, array, start, len, (float *) buf),
2682 HOTSPOT_JNI_GETFLOATARRAYREGION_RETURN());
2683 DEFINE_GETSCALARARRAYREGION(T_DOUBLE, jdouble, Double, double
2684 , HOTSPOT_JNI_GETDOUBLEARRAYREGION_ENTRY(env, array, start, len, (double *) buf),
2685 HOTSPOT_JNI_GETDOUBLEARRAYREGION_RETURN());
2686
2687
2688 #define DEFINE_SETSCALARARRAYREGION(ElementTag,ElementType,Result, Tag \
2689 , EntryProbe, ReturnProbe); \
2690 DT_VOID_RETURN_MARK_DECL(Set##Result##ArrayRegion \
2691 ,ReturnProbe); \
2692 \
2693 JNI_ENTRY(void, \
2694 jni_Set##Result##ArrayRegion(JNIEnv *env, ElementType##Array array, jsize start, \
2695 jsize len, const ElementType *buf)) \
2696 EntryProbe; \
2697 DT_VOID_RETURN_MARK(Set##Result##ArrayRegion); \
2698 typeArrayOop dst = typeArrayOop(JNIHandles::resolve_non_null(array)); \
2699 check_bounds(start, len, dst->length(), CHECK); \
2700 if (len > 0) { \
2701 ArrayAccess<>::arraycopy_from_native(buf, dst, typeArrayOopDesc::element_offset<ElementType>(start), len); \
2702 } \
2703 JNI_END
2704
2705 DEFINE_SETSCALARARRAYREGION(T_BOOLEAN, jboolean, Boolean, bool
2706 , HOTSPOT_JNI_SETBOOLEANARRAYREGION_ENTRY(env, array, start, len, (uintptr_t *)buf),
2707 HOTSPOT_JNI_SETBOOLEANARRAYREGION_RETURN())
2708 DEFINE_SETSCALARARRAYREGION(T_BYTE, jbyte, Byte, byte
2709 , HOTSPOT_JNI_SETBYTEARRAYREGION_ENTRY(env, array, start, len, (char *) buf),
2710 HOTSPOT_JNI_SETBYTEARRAYREGION_RETURN())
2711 DEFINE_SETSCALARARRAYREGION(T_SHORT, jshort, Short, short
2712 , HOTSPOT_JNI_SETSHORTARRAYREGION_ENTRY(env, array, start, len, (uint16_t *) buf),
2713 HOTSPOT_JNI_SETSHORTARRAYREGION_RETURN())
2714 DEFINE_SETSCALARARRAYREGION(T_CHAR, jchar, Char, char
2715 , HOTSPOT_JNI_SETCHARARRAYREGION_ENTRY(env, array, start, len, (uint16_t *) buf),
2716 HOTSPOT_JNI_SETCHARARRAYREGION_RETURN())
2717 DEFINE_SETSCALARARRAYREGION(T_INT, jint, Int, int
2718 , HOTSPOT_JNI_SETINTARRAYREGION_ENTRY(env, array, start, len, (uint32_t *) buf),
2719 HOTSPOT_JNI_SETINTARRAYREGION_RETURN())
2720 DEFINE_SETSCALARARRAYREGION(T_LONG, jlong, Long, long
2721 , HOTSPOT_JNI_SETLONGARRAYREGION_ENTRY(env, array, start, len, (uintptr_t *) buf),
2722 HOTSPOT_JNI_SETLONGARRAYREGION_RETURN())
2723 DEFINE_SETSCALARARRAYREGION(T_FLOAT, jfloat, Float, float
2724 , HOTSPOT_JNI_SETFLOATARRAYREGION_ENTRY(env, array, start, len, (float *) buf),
2725 HOTSPOT_JNI_SETFLOATARRAYREGION_RETURN())
2726 DEFINE_SETSCALARARRAYREGION(T_DOUBLE, jdouble, Double, double
2727 , HOTSPOT_JNI_SETDOUBLEARRAYREGION_ENTRY(env, array, start, len, (double *) buf),
2728 HOTSPOT_JNI_SETDOUBLEARRAYREGION_RETURN())
2729
2730
2731 DT_RETURN_MARK_DECL(RegisterNatives, jint
2732 , HOTSPOT_JNI_REGISTERNATIVES_RETURN(_ret_ref));
2733
2734 JNI_ENTRY(jint, jni_RegisterNatives(JNIEnv *env, jclass clazz,
2735 const JNINativeMethod *methods,
2736 jint nMethods))
2737 HOTSPOT_JNI_REGISTERNATIVES_ENTRY(env, clazz, (void *) methods, nMethods);
2738 jint ret = 0;
2739 DT_RETURN_MARK(RegisterNatives, jint, (const jint&)ret);
2740
2741 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz));
2742
2743 // There are no restrictions on native code registering native methods,
2744 // which allows agents to redefine the bindings to native methods, however
2745 // we issue a warning if any code running outside of the boot/platform
2746 // loader is rebinding any native methods in classes loaded by the
2747 // boot/platform loader that are in named modules. That will catch changes
2748 // to platform classes while excluding classes added to the bootclasspath.
2749 bool do_warning = false;
2750
2751 // Only instanceKlasses can have native methods
2752 if (k->is_instance_klass()) {
2753 oop cl = k->class_loader();
2754 InstanceKlass* ik = InstanceKlass::cast(k);
2755 // Check for a platform class
2756 if ((cl == NULL || SystemDictionary::is_platform_class_loader(cl)) &&
2757 ik->module()->is_named()) {
2758 Klass* caller = thread->security_get_caller_class(1);
2759 // If no caller class, or caller class has a different loader, then
2760 // issue a warning below.
2761 do_warning = (caller == NULL) || caller->class_loader() != cl;
2762 }
2763 }
2764
2765
2766 for (int index = 0; index < nMethods; index++) {
2767 const char* meth_name = methods[index].name;
2768 const char* meth_sig = methods[index].signature;
2769 int meth_name_len = (int)strlen(meth_name);
2770
2771 // The class should have been loaded (we have an instance of the class
2772 // passed in) so the method and signature should already be in the symbol
2773 // table. If they're not there, the method doesn't exist.
2774 TempNewSymbol name = SymbolTable::probe(meth_name, meth_name_len);
2775 TempNewSymbol signature = SymbolTable::probe(meth_sig, (int)strlen(meth_sig));
2776
2777 if (name == NULL || signature == NULL) {
2778 ResourceMark rm(THREAD);
2779 stringStream st;
2780 st.print("Method %s.%s%s not found", k->external_name(), meth_name, meth_sig);
2781 // Must return negative value on failure
2782 THROW_MSG_(vmSymbols::java_lang_NoSuchMethodError(), st.as_string(), -1);
2783 }
2784
2785 if (do_warning) {
2786 ResourceMark rm(THREAD);
2787 log_warning(jni, resolve)("Re-registering of platform native method: %s.%s%s "
2788 "from code in a different classloader", k->external_name(), meth_name, meth_sig);
2789 }
2790
2791 bool res = Method::register_native(k, name, signature,
2792 (address) methods[index].fnPtr, THREAD);
2793 if (!res) {
2794 ret = -1;
2795 break;
2796 }
2797 }
2798 return ret;
2799 JNI_END
2800
2801
2802 JNI_ENTRY(jint, jni_UnregisterNatives(JNIEnv *env, jclass clazz))
2803 HOTSPOT_JNI_UNREGISTERNATIVES_ENTRY(env, clazz);
2804 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz));
2805 //%note jni_2
2806 if (k->is_instance_klass()) {
2807 for (int index = 0; index < InstanceKlass::cast(k)->methods()->length(); index++) {
2808 Method* m = InstanceKlass::cast(k)->methods()->at(index);
2809 if (m->is_native()) {
2810 m->clear_native_function();
2811 m->set_signature_handler(NULL);
2812 }
2813 }
2814 }
2815 HOTSPOT_JNI_UNREGISTERNATIVES_RETURN(0);
2816 return 0;
2817 JNI_END
2818
2819 //
2820 // Monitor functions
2821 //
2822
2823 DT_RETURN_MARK_DECL(MonitorEnter, jint
2824 , HOTSPOT_JNI_MONITORENTER_RETURN(_ret_ref));
2825
2826 JNI_ENTRY(jint, jni_MonitorEnter(JNIEnv *env, jobject jobj))
2827 HOTSPOT_JNI_MONITORENTER_ENTRY(env, jobj);
2828 jint ret = JNI_ERR;
2829 DT_RETURN_MARK(MonitorEnter, jint, (const jint&)ret);
2830
2831 // If the object is null, we can't do anything with it
2832 if (jobj == NULL) {
2833 THROW_(vmSymbols::java_lang_NullPointerException(), JNI_ERR);
2834 }
2835
2836 Handle obj(thread, JNIHandles::resolve_non_null(jobj));
2837 ObjectSynchronizer::jni_enter(obj, thread);
2838 return JNI_OK;
2839 JNI_END
2840
2841 DT_RETURN_MARK_DECL(MonitorExit, jint
2842 , HOTSPOT_JNI_MONITOREXIT_RETURN(_ret_ref));
2843
2844 JNI_ENTRY(jint, jni_MonitorExit(JNIEnv *env, jobject jobj))
2845 HOTSPOT_JNI_MONITOREXIT_ENTRY(env, jobj);
2846 jint ret = JNI_ERR;
2847 DT_RETURN_MARK(MonitorExit, jint, (const jint&)ret);
2848
2849 // Don't do anything with a null object
2850 if (jobj == NULL) {
2851 THROW_(vmSymbols::java_lang_NullPointerException(), JNI_ERR);
2852 }
2853
2854 Handle obj(THREAD, JNIHandles::resolve_non_null(jobj));
2855 ObjectSynchronizer::jni_exit(obj(), CHECK_(JNI_ERR));
2856 return JNI_OK;
2857 JNI_END
2858
2859 //
2860 // Extensions
2861 //
2862
2863 DT_VOID_RETURN_MARK_DECL(GetStringRegion
2864 , HOTSPOT_JNI_GETSTRINGREGION_RETURN());
2865
2866 JNI_ENTRY(void, jni_GetStringRegion(JNIEnv *env, jstring string, jsize start, jsize len, jchar *buf))
2867 HOTSPOT_JNI_GETSTRINGREGION_ENTRY(env, string, start, len, buf);
2868 DT_VOID_RETURN_MARK(GetStringRegion);
2869 oop s = JNIHandles::resolve_non_null(string);
2870 typeArrayOop s_value = java_lang_String::value(s);
2871 int s_len = java_lang_String::length(s, s_value);
2872 if (start < 0 || len < 0 || start > s_len - len) {
2873 THROW(vmSymbols::java_lang_StringIndexOutOfBoundsException());
2874 } else {
2875 if (len > 0) {
2876 bool is_latin1 = java_lang_String::is_latin1(s);
2877 if (!is_latin1) {
2878 ArrayAccess<>::arraycopy_to_native(s_value, typeArrayOopDesc::element_offset<jchar>(start),
2879 buf, len);
2880 } else {
2881 for (int i = 0; i < len; i++) {
2882 buf[i] = ((jchar) s_value->byte_at(i + start)) & 0xff;
2883 }
2884 }
2885 }
2886 }
2887 JNI_END
2888
2889 DT_VOID_RETURN_MARK_DECL(GetStringUTFRegion
2890 , HOTSPOT_JNI_GETSTRINGUTFREGION_RETURN());
2891
2892 JNI_ENTRY(void, jni_GetStringUTFRegion(JNIEnv *env, jstring string, jsize start, jsize len, char *buf))
2893 HOTSPOT_JNI_GETSTRINGUTFREGION_ENTRY(env, string, start, len, buf);
2894 DT_VOID_RETURN_MARK(GetStringUTFRegion);
2895 oop s = JNIHandles::resolve_non_null(string);
2896 typeArrayOop s_value = java_lang_String::value(s);
2897 int s_len = java_lang_String::length(s, s_value);
2898 if (start < 0 || len < 0 || start > s_len - len) {
2899 THROW(vmSymbols::java_lang_StringIndexOutOfBoundsException());
2900 } else {
2901 //%note jni_7
2902 if (len > 0) {
2903 // Assume the buffer is large enough as the JNI spec. does not require user error checking
2904 java_lang_String::as_utf8_string(s, s_value, start, len, buf, INT_MAX);
2905 // as_utf8_string null-terminates the result string
2906 } else {
2907 // JDK null-terminates the buffer even in len is zero
2908 if (buf != NULL) {
2909 buf[0] = 0;
2910 }
2911 }
2912 }
2913 JNI_END
2914
2915 static oop lock_gc_or_pin_object(JavaThread* thread, jobject obj) {
2916 if (Universe::heap()->supports_object_pinning()) {
2917 const oop o = JNIHandles::resolve_non_null(obj);
2918 return Universe::heap()->pin_object(thread, o);
2919 } else {
2920 GCLocker::lock_critical(thread);
2921 return JNIHandles::resolve_non_null(obj);
2922 }
2923 }
2924
2925 static void unlock_gc_or_unpin_object(JavaThread* thread, jobject obj) {
2926 if (Universe::heap()->supports_object_pinning()) {
2927 const oop o = JNIHandles::resolve_non_null(obj);
2928 return Universe::heap()->unpin_object(thread, o);
2929 } else {
2930 GCLocker::unlock_critical(thread);
2931 }
2932 }
2933
2934 JNI_ENTRY(void*, jni_GetPrimitiveArrayCritical(JNIEnv *env, jarray array, jboolean *isCopy))
2935 HOTSPOT_JNI_GETPRIMITIVEARRAYCRITICAL_ENTRY(env, array, (uintptr_t *) isCopy);
2936 if (isCopy != NULL) {
2937 *isCopy = JNI_FALSE;
2938 }
2939 oop a = lock_gc_or_pin_object(thread, array);
2940 assert(a->is_typeArray(), "Primitive array only");
2941 BasicType type = TypeArrayKlass::cast(a->klass())->element_type();
2942 void* ret = arrayOop(a)->base(type);
2943 HOTSPOT_JNI_GETPRIMITIVEARRAYCRITICAL_RETURN(ret);
2944 return ret;
2945 JNI_END
2946
2947
2948 JNI_ENTRY(void, jni_ReleasePrimitiveArrayCritical(JNIEnv *env, jarray array, void *carray, jint mode))
2949 HOTSPOT_JNI_RELEASEPRIMITIVEARRAYCRITICAL_ENTRY(env, array, carray, mode);
2950 unlock_gc_or_unpin_object(thread, array);
2951 HOTSPOT_JNI_RELEASEPRIMITIVEARRAYCRITICAL_RETURN();
2952 JNI_END
2953
2954
2955 static typeArrayOop lock_gc_or_pin_string_value(JavaThread* thread, oop str) {
2956 if (Universe::heap()->supports_object_pinning()) {
2957 // Forbid deduplication before obtaining the value array, to prevent
2958 // deduplication from replacing the value array while setting up or in
2959 // the critical section. That would lead to the release operation
2960 // unpinning the wrong object.
2961 if (StringDedup::is_enabled()) {
2962 NoSafepointVerifier nsv;
2963 StringDedup::forbid_deduplication(str);
2964 }
2965 typeArrayOop s_value = java_lang_String::value(str);
2966 return (typeArrayOop) Universe::heap()->pin_object(thread, s_value);
2967 } else {
2968 Handle h(thread, str); // Handlize across potential safepoint.
2969 GCLocker::lock_critical(thread);
2970 return java_lang_String::value(h());
2971 }
2972 }
2973
2974 static void unlock_gc_or_unpin_string_value(JavaThread* thread, oop str) {
2975 if (Universe::heap()->supports_object_pinning()) {
2976 typeArrayOop s_value = java_lang_String::value(str);
2977 Universe::heap()->unpin_object(thread, s_value);
2978 } else {
2979 GCLocker::unlock_critical(thread);
2980 }
2981 }
2982
2983 JNI_ENTRY(const jchar*, jni_GetStringCritical(JNIEnv *env, jstring string, jboolean *isCopy))
2984 HOTSPOT_JNI_GETSTRINGCRITICAL_ENTRY(env, string, (uintptr_t *) isCopy);
2985 oop s = JNIHandles::resolve_non_null(string);
2986 jchar* ret;
2987 if (!java_lang_String::is_latin1(s)) {
2988 typeArrayOop s_value = lock_gc_or_pin_string_value(thread, s);
2989 ret = (jchar*) s_value->base(T_CHAR);
2990 if (isCopy != NULL) *isCopy = JNI_FALSE;
2991 } else {
2992 // Inflate latin1 encoded string to UTF16
2993 typeArrayOop s_value = java_lang_String::value(s);
2994 int s_len = java_lang_String::length(s, s_value);
2995 ret = NEW_C_HEAP_ARRAY_RETURN_NULL(jchar, s_len + 1, mtInternal); // add one for zero termination
2996 /* JNI Specification states return NULL on OOM */
2997 if (ret != NULL) {
2998 for (int i = 0; i < s_len; i++) {
2999 ret[i] = ((jchar) s_value->byte_at(i)) & 0xff;
3000 }
3001 ret[s_len] = 0;
3002 }
3003 if (isCopy != NULL) *isCopy = JNI_TRUE;
3004 }
3005 HOTSPOT_JNI_GETSTRINGCRITICAL_RETURN((uint16_t *) ret);
3006 return ret;
3007 JNI_END
3008
3009
3010 JNI_ENTRY(void, jni_ReleaseStringCritical(JNIEnv *env, jstring str, const jchar *chars))
3011 HOTSPOT_JNI_RELEASESTRINGCRITICAL_ENTRY(env, str, (uint16_t *) chars);
3012 oop s = JNIHandles::resolve_non_null(str);
3013 bool is_latin1 = java_lang_String::is_latin1(s);
3014 if (is_latin1) {
3015 // For latin1 string, free jchar array allocated by earlier call to GetStringCritical.
3016 // This assumes that ReleaseStringCritical bookends GetStringCritical.
3017 FREE_C_HEAP_ARRAY(jchar, chars);
3018 } else {
3019 // For non-latin1 string, drop the associated gc-locker/pin.
3020 unlock_gc_or_unpin_string_value(thread, s);
3021 }
3022 HOTSPOT_JNI_RELEASESTRINGCRITICAL_RETURN();
3023 JNI_END
3024
3025
3026 JNI_ENTRY(jweak, jni_NewWeakGlobalRef(JNIEnv *env, jobject ref))
3027 HOTSPOT_JNI_NEWWEAKGLOBALREF_ENTRY(env, ref);
3028 Handle ref_handle(thread, JNIHandles::resolve(ref));
3029 jweak ret = JNIHandles::make_weak_global(ref_handle, AllocFailStrategy::RETURN_NULL);
3030 if (ret == NULL) {
3031 THROW_OOP_(Universe::out_of_memory_error_c_heap(), NULL);
3032 }
3033 HOTSPOT_JNI_NEWWEAKGLOBALREF_RETURN(ret);
3034 return ret;
3035 JNI_END
3036
3037 // Must be JNI_ENTRY (with HandleMark)
3038 JNI_ENTRY(void, jni_DeleteWeakGlobalRef(JNIEnv *env, jweak ref))
3039 HOTSPOT_JNI_DELETEWEAKGLOBALREF_ENTRY(env, ref);
3040 JNIHandles::destroy_weak_global(ref);
3041 HOTSPOT_JNI_DELETEWEAKGLOBALREF_RETURN();
3042 JNI_END
3043
3044
3045 JNI_ENTRY_NO_PRESERVE(jboolean, jni_ExceptionCheck(JNIEnv *env))
3046 HOTSPOT_JNI_EXCEPTIONCHECK_ENTRY(env);
3047 jni_check_async_exceptions(thread);
3048 jboolean ret = (thread->has_pending_exception()) ? JNI_TRUE : JNI_FALSE;
3049 HOTSPOT_JNI_EXCEPTIONCHECK_RETURN(ret);
3050 return ret;
3051 JNI_END
3052
3053
3054 // Initialization state for three routines below relating to
3055 // java.nio.DirectBuffers
3056 static int directBufferSupportInitializeStarted = 0;
3057 static volatile int directBufferSupportInitializeEnded = 0;
3058 static volatile int directBufferSupportInitializeFailed = 0;
3059 static jclass bufferClass = NULL;
3060 static jclass directBufferClass = NULL;
3061 static jclass directByteBufferClass = NULL;
3062 static jmethodID directByteBufferConstructor = NULL;
3063 static jfieldID directBufferAddressField = NULL;
3064 static jfieldID bufferCapacityField = NULL;
3065
3066 static jclass lookupOne(JNIEnv* env, const char* name, TRAPS) {
3067 Handle loader; // null (bootstrap) loader
3068 Handle protection_domain; // null protection domain
3069
3070 TempNewSymbol sym = SymbolTable::new_symbol(name);
3071 jclass result = find_class_from_class_loader(env, sym, true, loader, protection_domain, true, CHECK_NULL);
3072
3073 if (log_is_enabled(Debug, class, resolve) && result != NULL) {
3074 trace_class_resolution(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(result)));
3075 }
3076 return result;
3077 }
3078
3079 // These lookups are done with the NULL (bootstrap) ClassLoader to
3080 // circumvent any security checks that would be done by jni_FindClass.
3081 JNI_ENTRY(bool, lookupDirectBufferClasses(JNIEnv* env))
3082 {
3083 if ((bufferClass = lookupOne(env, "java/nio/Buffer", thread)) == NULL) { return false; }
3084 if ((directBufferClass = lookupOne(env, "sun/nio/ch/DirectBuffer", thread)) == NULL) { return false; }
3085 if ((directByteBufferClass = lookupOne(env, "java/nio/DirectByteBuffer", thread)) == NULL) { return false; }
3086 return true;
3087 }
3088 JNI_END
3089
3090
3091 static bool initializeDirectBufferSupport(JNIEnv* env, JavaThread* thread) {
3092 if (directBufferSupportInitializeFailed) {
3093 return false;
3094 }
3095
3096 if (Atomic::cmpxchg(&directBufferSupportInitializeStarted, 0, 1) == 0) {
3097 if (!lookupDirectBufferClasses(env)) {
3098 directBufferSupportInitializeFailed = 1;
3099 return false;
3100 }
3101
3102 // Make global references for these
3103 bufferClass = (jclass) env->NewGlobalRef(bufferClass);
3104 directBufferClass = (jclass) env->NewGlobalRef(directBufferClass);
3105 directByteBufferClass = (jclass) env->NewGlobalRef(directByteBufferClass);
3106
3107 // Global refs will be NULL if out-of-memory (no exception is pending)
3108 if (bufferClass == NULL || directBufferClass == NULL || directByteBufferClass == NULL) {
3109 directBufferSupportInitializeFailed = 1;
3110 return false;
3111 }
3112
3113 // Get needed field and method IDs
3114 directByteBufferConstructor = env->GetMethodID(directByteBufferClass, "<init>", "(JI)V");
3115 if (env->ExceptionCheck()) {
3116 env->ExceptionClear();
3117 directBufferSupportInitializeFailed = 1;
3118 return false;
3119 }
3120 directBufferAddressField = env->GetFieldID(bufferClass, "address", "J");
3121 if (env->ExceptionCheck()) {
3122 env->ExceptionClear();
3123 directBufferSupportInitializeFailed = 1;
3124 return false;
3125 }
3126 bufferCapacityField = env->GetFieldID(bufferClass, "capacity", "I");
3127 if (env->ExceptionCheck()) {
3128 env->ExceptionClear();
3129 directBufferSupportInitializeFailed = 1;
3130 return false;
3131 }
3132
3133 if ((directByteBufferConstructor == NULL) ||
3134 (directBufferAddressField == NULL) ||
3135 (bufferCapacityField == NULL)) {
3136 directBufferSupportInitializeFailed = 1;
3137 return false;
3138 }
3139
3140 directBufferSupportInitializeEnded = 1;
3141 } else {
3142 while (!directBufferSupportInitializeEnded && !directBufferSupportInitializeFailed) {
3143 os::naked_yield();
3144 }
3145 }
3146
3147 return !directBufferSupportInitializeFailed;
3148 }
3149
3150 extern "C" jobject JNICALL jni_NewDirectByteBuffer(JNIEnv *env, void* address, jlong capacity)
3151 {
3152 // thread_from_jni_environment() will block if VM is gone.
3153 JavaThread* thread = JavaThread::thread_from_jni_environment(env);
3154
3155 HOTSPOT_JNI_NEWDIRECTBYTEBUFFER_ENTRY(env, address, capacity);
3156
3157 if (!directBufferSupportInitializeEnded) {
3158 if (!initializeDirectBufferSupport(env, thread)) {
3159 HOTSPOT_JNI_NEWDIRECTBYTEBUFFER_RETURN(NULL);
3160 return NULL;
3161 }
3162 }
3163
3164 // Being paranoid about accidental sign extension on address
3165 jlong addr = (jlong) ((uintptr_t) address);
3166 // NOTE that package-private DirectByteBuffer constructor currently
3167 // takes int capacity
3168 jint cap = (jint) capacity;
3169 jobject ret = env->NewObject(directByteBufferClass, directByteBufferConstructor, addr, cap);
3170 HOTSPOT_JNI_NEWDIRECTBYTEBUFFER_RETURN(ret);
3171 return ret;
3172 }
3173
3174 DT_RETURN_MARK_DECL(GetDirectBufferAddress, void*
3175 , HOTSPOT_JNI_GETDIRECTBUFFERADDRESS_RETURN((void*) _ret_ref));
3176
3177 extern "C" void* JNICALL jni_GetDirectBufferAddress(JNIEnv *env, jobject buf)
3178 {
3179 // thread_from_jni_environment() will block if VM is gone.
3180 JavaThread* thread = JavaThread::thread_from_jni_environment(env);
3181
3182 HOTSPOT_JNI_GETDIRECTBUFFERADDRESS_ENTRY(env, buf);
3183 void* ret = NULL;
3184 DT_RETURN_MARK(GetDirectBufferAddress, void*, (const void*&)ret);
3185
3186 if (!directBufferSupportInitializeEnded) {
3187 if (!initializeDirectBufferSupport(env, thread)) {
3188 return 0;
3189 }
3190 }
3191
3192 if ((buf != NULL) && (!env->IsInstanceOf(buf, directBufferClass))) {
3193 return 0;
3194 }
3195
3196 ret = (void*)(intptr_t)env->GetLongField(buf, directBufferAddressField);
3197 return ret;
3198 }
3199
3200 DT_RETURN_MARK_DECL(GetDirectBufferCapacity, jlong
3201 , HOTSPOT_JNI_GETDIRECTBUFFERCAPACITY_RETURN(_ret_ref));
3202
3203 extern "C" jlong JNICALL jni_GetDirectBufferCapacity(JNIEnv *env, jobject buf)
3204 {
3205 // thread_from_jni_environment() will block if VM is gone.
3206 JavaThread* thread = JavaThread::thread_from_jni_environment(env);
3207
3208 HOTSPOT_JNI_GETDIRECTBUFFERCAPACITY_ENTRY(env, buf);
3209 jlong ret = -1;
3210 DT_RETURN_MARK(GetDirectBufferCapacity, jlong, (const jlong&)ret);
3211
3212 if (!directBufferSupportInitializeEnded) {
3213 if (!initializeDirectBufferSupport(env, thread)) {
3214 ret = 0;
3215 return ret;
3216 }
3217 }
3218
3219 if (buf == NULL) {
3220 return -1;
3221 }
3222
3223 if (!env->IsInstanceOf(buf, directBufferClass)) {
3224 return -1;
3225 }
3226
3227 // NOTE that capacity is currently an int in the implementation
3228 ret = env->GetIntField(buf, bufferCapacityField);
3229 return ret;
3230 }
3231
3232
3233 JNI_LEAF(jint, jni_GetVersion(JNIEnv *env))
3234 HOTSPOT_JNI_GETVERSION_ENTRY(env);
3235 HOTSPOT_JNI_GETVERSION_RETURN(CurrentVersion);
3236 return CurrentVersion;
3237 JNI_END
3238
3239 extern struct JavaVM_ main_vm;
3240
3241 JNI_LEAF(jint, jni_GetJavaVM(JNIEnv *env, JavaVM **vm))
3242 HOTSPOT_JNI_GETJAVAVM_ENTRY(env, (void **) vm);
3243 *vm = (JavaVM *)(&main_vm);
3244 HOTSPOT_JNI_GETJAVAVM_RETURN(JNI_OK);
3245 return JNI_OK;
3246 JNI_END
3247
3248
3249 JNI_ENTRY(jobject, jni_GetModule(JNIEnv* env, jclass clazz))
3250 return Modules::get_module(clazz, THREAD);
3251 JNI_END
3252
3253 JNI_ENTRY(jboolean, jni_IsVirtualThread(JNIEnv* env, jobject obj))
3254 oop thread_obj = JNIHandles::resolve_external_guard(obj);
3255 if (thread_obj != NULL && thread_obj->is_a(vmClasses::BasicVirtualThread_klass())) {
3256 return JNI_TRUE;
3257 } else {
3258 return JNI_FALSE;
3259 }
3260 JNI_END
3261
3262
3263 // Structure containing all jni functions
3264 struct JNINativeInterface_ jni_NativeInterface = {
3265 NULL,
3266 NULL,
3267 NULL,
3268
3269 NULL,
3270
3271 jni_GetVersion,
3272
3273 jni_DefineClass,
3274 jni_FindClass,
3275
3276 jni_FromReflectedMethod,
3277 jni_FromReflectedField,
3278
3279 jni_ToReflectedMethod,
3280
3281 jni_GetSuperclass,
3282 jni_IsAssignableFrom,
3283
3284 jni_ToReflectedField,
3285
3286 jni_Throw,
3287 jni_ThrowNew,
3288 jni_ExceptionOccurred,
3289 jni_ExceptionDescribe,
3290 jni_ExceptionClear,
3291 jni_FatalError,
3292
3293 jni_PushLocalFrame,
3294 jni_PopLocalFrame,
3295
3296 jni_NewGlobalRef,
3297 jni_DeleteGlobalRef,
3298 jni_DeleteLocalRef,
3299 jni_IsSameObject,
3300
3301 jni_NewLocalRef,
3302 jni_EnsureLocalCapacity,
3303
3304 jni_AllocObject,
3305 jni_NewObject,
3306 jni_NewObjectV,
3307 jni_NewObjectA,
3308
3309 jni_GetObjectClass,
3310 jni_IsInstanceOf,
3311
3312 jni_GetMethodID,
3313
3314 jni_CallObjectMethod,
3315 jni_CallObjectMethodV,
3316 jni_CallObjectMethodA,
3317 jni_CallBooleanMethod,
3318 jni_CallBooleanMethodV,
3319 jni_CallBooleanMethodA,
3320 jni_CallByteMethod,
3321 jni_CallByteMethodV,
3322 jni_CallByteMethodA,
3323 jni_CallCharMethod,
3324 jni_CallCharMethodV,
3325 jni_CallCharMethodA,
3326 jni_CallShortMethod,
3327 jni_CallShortMethodV,
3328 jni_CallShortMethodA,
3329 jni_CallIntMethod,
3330 jni_CallIntMethodV,
3331 jni_CallIntMethodA,
3332 jni_CallLongMethod,
3333 jni_CallLongMethodV,
3334 jni_CallLongMethodA,
3335 jni_CallFloatMethod,
3336 jni_CallFloatMethodV,
3337 jni_CallFloatMethodA,
3338 jni_CallDoubleMethod,
3339 jni_CallDoubleMethodV,
3340 jni_CallDoubleMethodA,
3341 jni_CallVoidMethod,
3342 jni_CallVoidMethodV,
3343 jni_CallVoidMethodA,
3344
3345 jni_CallNonvirtualObjectMethod,
3346 jni_CallNonvirtualObjectMethodV,
3347 jni_CallNonvirtualObjectMethodA,
3348 jni_CallNonvirtualBooleanMethod,
3349 jni_CallNonvirtualBooleanMethodV,
3350 jni_CallNonvirtualBooleanMethodA,
3351 jni_CallNonvirtualByteMethod,
3352 jni_CallNonvirtualByteMethodV,
3353 jni_CallNonvirtualByteMethodA,
3354 jni_CallNonvirtualCharMethod,
3355 jni_CallNonvirtualCharMethodV,
3356 jni_CallNonvirtualCharMethodA,
3357 jni_CallNonvirtualShortMethod,
3358 jni_CallNonvirtualShortMethodV,
3359 jni_CallNonvirtualShortMethodA,
3360 jni_CallNonvirtualIntMethod,
3361 jni_CallNonvirtualIntMethodV,
3362 jni_CallNonvirtualIntMethodA,
3363 jni_CallNonvirtualLongMethod,
3364 jni_CallNonvirtualLongMethodV,
3365 jni_CallNonvirtualLongMethodA,
3366 jni_CallNonvirtualFloatMethod,
3367 jni_CallNonvirtualFloatMethodV,
3368 jni_CallNonvirtualFloatMethodA,
3369 jni_CallNonvirtualDoubleMethod,
3370 jni_CallNonvirtualDoubleMethodV,
3371 jni_CallNonvirtualDoubleMethodA,
3372 jni_CallNonvirtualVoidMethod,
3373 jni_CallNonvirtualVoidMethodV,
3374 jni_CallNonvirtualVoidMethodA,
3375
3376 jni_GetFieldID,
3377
3378 jni_GetObjectField,
3379 jni_GetBooleanField,
3380 jni_GetByteField,
3381 jni_GetCharField,
3382 jni_GetShortField,
3383 jni_GetIntField,
3384 jni_GetLongField,
3385 jni_GetFloatField,
3386 jni_GetDoubleField,
3387
3388 jni_SetObjectField,
3389 jni_SetBooleanField,
3390 jni_SetByteField,
3391 jni_SetCharField,
3392 jni_SetShortField,
3393 jni_SetIntField,
3394 jni_SetLongField,
3395 jni_SetFloatField,
3396 jni_SetDoubleField,
3397
3398 jni_GetStaticMethodID,
3399
3400 jni_CallStaticObjectMethod,
3401 jni_CallStaticObjectMethodV,
3402 jni_CallStaticObjectMethodA,
3403 jni_CallStaticBooleanMethod,
3404 jni_CallStaticBooleanMethodV,
3405 jni_CallStaticBooleanMethodA,
3406 jni_CallStaticByteMethod,
3407 jni_CallStaticByteMethodV,
3408 jni_CallStaticByteMethodA,
3409 jni_CallStaticCharMethod,
3410 jni_CallStaticCharMethodV,
3411 jni_CallStaticCharMethodA,
3412 jni_CallStaticShortMethod,
3413 jni_CallStaticShortMethodV,
3414 jni_CallStaticShortMethodA,
3415 jni_CallStaticIntMethod,
3416 jni_CallStaticIntMethodV,
3417 jni_CallStaticIntMethodA,
3418 jni_CallStaticLongMethod,
3419 jni_CallStaticLongMethodV,
3420 jni_CallStaticLongMethodA,
3421 jni_CallStaticFloatMethod,
3422 jni_CallStaticFloatMethodV,
3423 jni_CallStaticFloatMethodA,
3424 jni_CallStaticDoubleMethod,
3425 jni_CallStaticDoubleMethodV,
3426 jni_CallStaticDoubleMethodA,
3427 jni_CallStaticVoidMethod,
3428 jni_CallStaticVoidMethodV,
3429 jni_CallStaticVoidMethodA,
3430
3431 jni_GetStaticFieldID,
3432
3433 jni_GetStaticObjectField,
3434 jni_GetStaticBooleanField,
3435 jni_GetStaticByteField,
3436 jni_GetStaticCharField,
3437 jni_GetStaticShortField,
3438 jni_GetStaticIntField,
3439 jni_GetStaticLongField,
3440 jni_GetStaticFloatField,
3441 jni_GetStaticDoubleField,
3442
3443 jni_SetStaticObjectField,
3444 jni_SetStaticBooleanField,
3445 jni_SetStaticByteField,
3446 jni_SetStaticCharField,
3447 jni_SetStaticShortField,
3448 jni_SetStaticIntField,
3449 jni_SetStaticLongField,
3450 jni_SetStaticFloatField,
3451 jni_SetStaticDoubleField,
3452
3453 jni_NewString,
3454 jni_GetStringLength,
3455 jni_GetStringChars,
3456 jni_ReleaseStringChars,
3457
3458 jni_NewStringUTF,
3459 jni_GetStringUTFLength,
3460 jni_GetStringUTFChars,
3461 jni_ReleaseStringUTFChars,
3462
3463 jni_GetArrayLength,
3464
3465 jni_NewObjectArray,
3466 jni_GetObjectArrayElement,
3467 jni_SetObjectArrayElement,
3468
3469 jni_NewBooleanArray,
3470 jni_NewByteArray,
3471 jni_NewCharArray,
3472 jni_NewShortArray,
3473 jni_NewIntArray,
3474 jni_NewLongArray,
3475 jni_NewFloatArray,
3476 jni_NewDoubleArray,
3477
3478 jni_GetBooleanArrayElements,
3479 jni_GetByteArrayElements,
3480 jni_GetCharArrayElements,
3481 jni_GetShortArrayElements,
3482 jni_GetIntArrayElements,
3483 jni_GetLongArrayElements,
3484 jni_GetFloatArrayElements,
3485 jni_GetDoubleArrayElements,
3486
3487 jni_ReleaseBooleanArrayElements,
3488 jni_ReleaseByteArrayElements,
3489 jni_ReleaseCharArrayElements,
3490 jni_ReleaseShortArrayElements,
3491 jni_ReleaseIntArrayElements,
3492 jni_ReleaseLongArrayElements,
3493 jni_ReleaseFloatArrayElements,
3494 jni_ReleaseDoubleArrayElements,
3495
3496 jni_GetBooleanArrayRegion,
3497 jni_GetByteArrayRegion,
3498 jni_GetCharArrayRegion,
3499 jni_GetShortArrayRegion,
3500 jni_GetIntArrayRegion,
3501 jni_GetLongArrayRegion,
3502 jni_GetFloatArrayRegion,
3503 jni_GetDoubleArrayRegion,
3504
3505 jni_SetBooleanArrayRegion,
3506 jni_SetByteArrayRegion,
3507 jni_SetCharArrayRegion,
3508 jni_SetShortArrayRegion,
3509 jni_SetIntArrayRegion,
3510 jni_SetLongArrayRegion,
3511 jni_SetFloatArrayRegion,
3512 jni_SetDoubleArrayRegion,
3513
3514 jni_RegisterNatives,
3515 jni_UnregisterNatives,
3516
3517 jni_MonitorEnter,
3518 jni_MonitorExit,
3519
3520 jni_GetJavaVM,
3521
3522 jni_GetStringRegion,
3523 jni_GetStringUTFRegion,
3524
3525 jni_GetPrimitiveArrayCritical,
3526 jni_ReleasePrimitiveArrayCritical,
3527
3528 jni_GetStringCritical,
3529 jni_ReleaseStringCritical,
3530
3531 jni_NewWeakGlobalRef,
3532 jni_DeleteWeakGlobalRef,
3533
3534 jni_ExceptionCheck,
3535
3536 jni_NewDirectByteBuffer,
3537 jni_GetDirectBufferAddress,
3538 jni_GetDirectBufferCapacity,
3539
3540 // New 1_6 features
3541
3542 jni_GetObjectRefType,
3543
3544 // Module features
3545
3546 jni_GetModule,
3547
3548 // Virtual threads
3549
3550 jni_IsVirtualThread
3551 };
3552
3553
3554 // For jvmti use to modify jni function table.
3555 // Java threads in native contiues to run until it is transitioned
3556 // to VM at safepoint. Before the transition or before it is blocked
3557 // for safepoint it may access jni function table. VM could crash if
3558 // any java thread access the jni function table in the middle of memcpy.
3559 // To avoid this each function pointers are copied automically.
3560 void copy_jni_function_table(const struct JNINativeInterface_ *new_jni_NativeInterface) {
3561 assert(SafepointSynchronize::is_at_safepoint(), "must be at safepoint");
3562 intptr_t *a = (intptr_t *) jni_functions();
3563 intptr_t *b = (intptr_t *) new_jni_NativeInterface;
3564 for (uint i=0; i < sizeof(struct JNINativeInterface_)/sizeof(void *); i++) {
3565 Atomic::store(a++, *b++);
3566 }
3567 }
3568
3569 void quicken_jni_functions() {
3570 // Replace Get<Primitive>Field with fast versions
3571 if (UseFastJNIAccessors && !VerifyJNIFields && !CheckJNICalls) {
3572 address func;
3573 func = JNI_FastGetField::generate_fast_get_boolean_field();
3574 if (func != (address)-1) {
3575 jni_NativeInterface.GetBooleanField = (GetBooleanField_t)func;
3576 }
3577 func = JNI_FastGetField::generate_fast_get_byte_field();
3578 if (func != (address)-1) {
3579 jni_NativeInterface.GetByteField = (GetByteField_t)func;
3580 }
3581 func = JNI_FastGetField::generate_fast_get_char_field();
3582 if (func != (address)-1) {
3583 jni_NativeInterface.GetCharField = (GetCharField_t)func;
3584 }
3585 func = JNI_FastGetField::generate_fast_get_short_field();
3586 if (func != (address)-1) {
3587 jni_NativeInterface.GetShortField = (GetShortField_t)func;
3588 }
3589 func = JNI_FastGetField::generate_fast_get_int_field();
3590 if (func != (address)-1) {
3591 jni_NativeInterface.GetIntField = (GetIntField_t)func;
3592 }
3593 func = JNI_FastGetField::generate_fast_get_long_field();
3594 if (func != (address)-1) {
3595 jni_NativeInterface.GetLongField = (GetLongField_t)func;
3596 }
3597 func = JNI_FastGetField::generate_fast_get_float_field();
3598 if (func != (address)-1) {
3599 jni_NativeInterface.GetFloatField = (GetFloatField_t)func;
3600 }
3601 func = JNI_FastGetField::generate_fast_get_double_field();
3602 if (func != (address)-1) {
3603 jni_NativeInterface.GetDoubleField = (GetDoubleField_t)func;
3604 }
3605 }
3606 }
3607
3608 // Returns the function structure
3609 struct JNINativeInterface_* jni_functions() {
3610 #if INCLUDE_JNI_CHECK
3611 if (CheckJNICalls) return jni_functions_check();
3612 #endif // INCLUDE_JNI_CHECK
3613 return &jni_NativeInterface;
3614 }
3615
3616 // Returns the function structure
3617 struct JNINativeInterface_* jni_functions_nocheck() {
3618 return &jni_NativeInterface;
3619 }
3620
3621 static void post_thread_start_event(const JavaThread* jt) {
3622 assert(jt != NULL, "invariant");
3623 EventThreadStart event;
3624 if (event.should_commit()) {
3625 event.set_thread(JFR_JVM_THREAD_ID(jt));
3626 event.set_parentThread((traceid)0);
3627 #if INCLUDE_JFR
3628 if (EventThreadStart::is_stacktrace_enabled()) {
3629 jt->jfr_thread_local()->set_cached_stack_trace_id((traceid)0);
3630 event.commit();
3631 jt->jfr_thread_local()->clear_cached_stack_trace();
3632 } else
3633 #endif
3634 {
3635 event.commit();
3636 }
3637 }
3638 }
3639
3640 // Invocation API
3641
3642
3643 // Forward declaration
3644 extern const struct JNIInvokeInterface_ jni_InvokeInterface;
3645
3646 // Global invocation API vars
3647 volatile int vm_created = 0;
3648 // Indicate whether it is safe to recreate VM. Recreation is only
3649 // possible after a failed initial creation attempt in some cases.
3650 volatile int safe_to_recreate_vm = 1;
3651 struct JavaVM_ main_vm = {&jni_InvokeInterface};
3652
3653
3654 #define JAVASTACKSIZE (400 * 1024) /* Default size of a thread java stack */
3655 enum { VERIFY_NONE, VERIFY_REMOTE, VERIFY_ALL };
3656
3657 DT_RETURN_MARK_DECL(GetDefaultJavaVMInitArgs, jint
3658 , HOTSPOT_JNI_GETDEFAULTJAVAVMINITARGS_RETURN(_ret_ref));
3659
3660 _JNI_IMPORT_OR_EXPORT_ jint JNICALL JNI_GetDefaultJavaVMInitArgs(void *args_) {
3661 HOTSPOT_JNI_GETDEFAULTJAVAVMINITARGS_ENTRY(args_);
3662 JDK1_1InitArgs *args = (JDK1_1InitArgs *)args_;
3663 jint ret = JNI_ERR;
3664 DT_RETURN_MARK(GetDefaultJavaVMInitArgs, jint, (const jint&)ret);
3665
3666 if (Threads::is_supported_jni_version(args->version)) {
3667 ret = JNI_OK;
3668 }
3669 // 1.1 style no longer supported in hotspot.
3670 // According the JNI spec, we should update args->version on return.
3671 // We also use the structure to communicate with launcher about default
3672 // stack size.
3673 if (args->version == JNI_VERSION_1_1) {
3674 args->version = JNI_VERSION_1_2;
3675 // javaStackSize is int in arguments structure
3676 assert(jlong(ThreadStackSize) * K < INT_MAX, "integer overflow");
3677 args->javaStackSize = (jint)(ThreadStackSize * K);
3678 }
3679 return ret;
3680 }
3681
3682 DT_RETURN_MARK_DECL(CreateJavaVM, jint
3683 , HOTSPOT_JNI_CREATEJAVAVM_RETURN(_ret_ref));
3684
3685 static jint JNI_CreateJavaVM_inner(JavaVM **vm, void **penv, void *args) {
3686 HOTSPOT_JNI_CREATEJAVAVM_ENTRY((void **) vm, penv, args);
3687
3688 jint result = JNI_ERR;
3689 DT_RETURN_MARK(CreateJavaVM, jint, (const jint&)result);
3690
3691 // We're about to use Atomic::xchg for synchronization. Some Zero
3692 // platforms use the GCC builtin __sync_lock_test_and_set for this,
3693 // but __sync_lock_test_and_set is not guaranteed to do what we want
3694 // on all architectures. So we check it works before relying on it.
3695 #if defined(ZERO) && defined(ASSERT)
3696 {
3697 jint a = 0xcafebabe;
3698 jint b = Atomic::xchg(&a, (jint) 0xdeadbeef);
3699 void *c = &a;
3700 void *d = Atomic::xchg(&c, &b);
3701 assert(a == (jint) 0xdeadbeef && b == (jint) 0xcafebabe, "Atomic::xchg() works");
3702 assert(c == &b && d == &a, "Atomic::xchg() works");
3703 }
3704 #endif // ZERO && ASSERT
3705
3706 // At the moment it's only possible to have one Java VM,
3707 // since some of the runtime state is in global variables.
3708
3709 // We cannot use our mutex locks here, since they only work on
3710 // Threads. We do an atomic compare and exchange to ensure only
3711 // one thread can call this method at a time
3712
3713 // We use Atomic::xchg rather than Atomic::add/dec since on some platforms
3714 // the add/dec implementations are dependent on whether we are running
3715 // on a multiprocessor Atomic::xchg does not have this problem.
3716 if (Atomic::xchg(&vm_created, 1) == 1) {
3717 return JNI_EEXIST; // already created, or create attempt in progress
3718 }
3719
3720 // If a previous creation attempt failed but can be retried safely,
3721 // then safe_to_recreate_vm will have been reset to 1 after being
3722 // cleared here. If a previous creation attempt succeeded and we then
3723 // destroyed that VM, we will be prevented from trying to recreate
3724 // the VM in the same process, as the value will still be 0.
3725 if (Atomic::xchg(&safe_to_recreate_vm, 0) == 0) {
3726 return JNI_ERR;
3727 }
3728
3729 assert(vm_created == 1, "vm_created is true during the creation");
3730
3731 /**
3732 * Certain errors during initialization are recoverable and do not
3733 * prevent this method from being called again at a later time
3734 * (perhaps with different arguments). However, at a certain
3735 * point during initialization if an error occurs we cannot allow
3736 * this function to be called again (or it will crash). In those
3737 * situations, the 'canTryAgain' flag is set to false, which atomically
3738 * sets safe_to_recreate_vm to 1, such that any new call to
3739 * JNI_CreateJavaVM will immediately fail using the above logic.
3740 */
3741 bool can_try_again = true;
3742
3743 result = Threads::create_vm((JavaVMInitArgs*) args, &can_try_again);
3744 if (result == JNI_OK) {
3745 JavaThread *thread = JavaThread::current();
3746 assert(!thread->has_pending_exception(), "should have returned not OK");
3747 /* thread is thread_in_vm here */
3748 *vm = (JavaVM *)(&main_vm);
3749 *(JNIEnv**)penv = thread->jni_environment();
3750
3751 #if INCLUDE_JVMCI
3752 if (EnableJVMCI) {
3753 if (UseJVMCICompiler) {
3754 // JVMCI is initialized on a CompilerThread
3755 if (BootstrapJVMCI) {
3756 JavaThread* THREAD = thread; // For exception macros.
3757 JVMCICompiler* compiler = JVMCICompiler::instance(true, CATCH);
3758 compiler->bootstrap(THREAD);
3759 if (HAS_PENDING_EXCEPTION) {
3760 HandleMark hm(THREAD);
3761 vm_exit_during_initialization(Handle(THREAD, PENDING_EXCEPTION));
3762 }
3763 }
3764 }
3765 }
3766 #endif
3767
3768 // Notify JVMTI
3769 if (JvmtiExport::should_post_thread_life()) {
3770 JvmtiExport::post_thread_start(thread);
3771 }
3772
3773 post_thread_start_event(thread);
3774
3775 if (ReplayCompiles) ciReplay::replay(thread);
3776
3777 #ifdef ASSERT
3778 // Some platforms (like Win*) need a wrapper around these test
3779 // functions in order to properly handle error conditions.
3780 if (ErrorHandlerTest != 0) {
3781 VMError::controlled_crash(ErrorHandlerTest);
3782 }
3783 #endif
3784
3785 // Since this is not a JVM_ENTRY we have to set the thread state manually before leaving.
3786 ThreadStateTransition::transition_from_vm(thread, _thread_in_native);
3787 MACOS_AARCH64_ONLY(thread->enable_wx(WXExec));
3788 } else {
3789 // If create_vm exits because of a pending exception, exit with that
3790 // exception. In the future when we figure out how to reclaim memory,
3791 // we may be able to exit with JNI_ERR and allow the calling application
3792 // to continue.
3793 if (Universe::is_fully_initialized()) {
3794 // otherwise no pending exception possible - VM will already have aborted
3795 JavaThread* THREAD = JavaThread::current(); // For exception macros.
3796 if (HAS_PENDING_EXCEPTION) {
3797 HandleMark hm(THREAD);
3798 vm_exit_during_initialization(Handle(THREAD, PENDING_EXCEPTION));
3799 }
3800 }
3801
3802 if (can_try_again) {
3803 // reset safe_to_recreate_vm to 1 so that retrial would be possible
3804 safe_to_recreate_vm = 1;
3805 }
3806
3807 // Creation failed. We must reset vm_created
3808 *vm = 0;
3809 *(JNIEnv**)penv = 0;
3810 // reset vm_created last to avoid race condition. Use OrderAccess to
3811 // control both compiler and architectural-based reordering.
3812 Atomic::release_store(&vm_created, 0);
3813 }
3814
3815 // Flush stdout and stderr before exit.
3816 fflush(stdout);
3817 fflush(stderr);
3818
3819 return result;
3820
3821 }
3822
3823 _JNI_IMPORT_OR_EXPORT_ jint JNICALL JNI_CreateJavaVM(JavaVM **vm, void **penv, void *args) {
3824 jint result = JNI_ERR;
3825 // On Windows, let CreateJavaVM run with SEH protection
3826 #if defined(_WIN32) && !defined(USE_VECTORED_EXCEPTION_HANDLING)
3827 __try {
3828 #endif
3829 result = JNI_CreateJavaVM_inner(vm, penv, args);
3830 #if defined(_WIN32) && !defined(USE_VECTORED_EXCEPTION_HANDLING)
3831 } __except(topLevelExceptionFilter((_EXCEPTION_POINTERS*)_exception_info())) {
3832 // Nothing to do.
3833 }
3834 #endif
3835 return result;
3836 }
3837
3838 _JNI_IMPORT_OR_EXPORT_ jint JNICALL JNI_GetCreatedJavaVMs(JavaVM **vm_buf, jsize bufLen, jsize *numVMs) {
3839 HOTSPOT_JNI_GETCREATEDJAVAVMS_ENTRY((void **) vm_buf, bufLen, (uintptr_t *) numVMs);
3840
3841 if (vm_created == 1) {
3842 if (numVMs != NULL) *numVMs = 1;
3843 if (bufLen > 0) *vm_buf = (JavaVM *)(&main_vm);
3844 } else {
3845 if (numVMs != NULL) *numVMs = 0;
3846 }
3847 HOTSPOT_JNI_GETCREATEDJAVAVMS_RETURN(JNI_OK);
3848 return JNI_OK;
3849 }
3850
3851 extern "C" {
3852
3853 DT_RETURN_MARK_DECL(DestroyJavaVM, jint
3854 , HOTSPOT_JNI_DESTROYJAVAVM_RETURN(_ret_ref));
3855
3856 static jint JNICALL jni_DestroyJavaVM_inner(JavaVM *vm) {
3857 HOTSPOT_JNI_DESTROYJAVAVM_ENTRY(vm);
3858 jint res = JNI_ERR;
3859 DT_RETURN_MARK(DestroyJavaVM, jint, (const jint&)res);
3860
3861 if (vm_created == 0) {
3862 res = JNI_ERR;
3863 return res;
3864 }
3865
3866 JNIEnv *env;
3867 JavaVMAttachArgs destroyargs;
3868 destroyargs.version = CurrentVersion;
3869 destroyargs.name = (char *)"DestroyJavaVM";
3870 destroyargs.group = NULL;
3871 res = vm->AttachCurrentThread((void **)&env, (void *)&destroyargs);
3872 if (res != JNI_OK) {
3873 return res;
3874 }
3875
3876 JavaThread* thread = JavaThread::current();
3877
3878 // Make sure we are actually in a newly attached thread, with no
3879 // existing Java frame.
3880 if (thread->has_last_Java_frame()) {
3881 return JNI_ERR;
3882 }
3883
3884 // Since this is not a JVM_ENTRY we have to set the thread state manually before entering.
3885
3886 // We are going to VM, change W^X state to the expected one.
3887 MACOS_AARCH64_ONLY(WXMode oldmode = thread->enable_wx(WXWrite));
3888
3889 ThreadStateTransition::transition_from_native(thread, _thread_in_vm);
3890 Threads::destroy_vm();
3891 // Don't bother restoring thread state, VM is gone.
3892 vm_created = 0;
3893 return JNI_OK;
3894 }
3895
3896 jint JNICALL jni_DestroyJavaVM(JavaVM *vm) {
3897 jint result = JNI_ERR;
3898 // On Windows, we need SEH protection
3899 #if defined(_WIN32) && !defined(USE_VECTORED_EXCEPTION_HANDLING)
3900 __try {
3901 #endif
3902 result = jni_DestroyJavaVM_inner(vm);
3903 #if defined(_WIN32) && !defined(USE_VECTORED_EXCEPTION_HANDLING)
3904 } __except(topLevelExceptionFilter((_EXCEPTION_POINTERS*)_exception_info())) {
3905 // Nothing to do.
3906 }
3907 #endif
3908 return result;
3909 }
3910
3911 static jint attach_current_thread(JavaVM *vm, void **penv, void *_args, bool daemon) {
3912 JavaVMAttachArgs *args = (JavaVMAttachArgs *) _args;
3913
3914 // Check below commented out from JDK1.2fcs as well
3915 /*
3916 if (args && (args->version != JNI_VERSION_1_1 || args->version != JNI_VERSION_1_2)) {
3917 return JNI_EVERSION;
3918 }
3919 */
3920
3921 Thread* t = Thread::current_or_null();
3922 if (t != NULL) {
3923 // If executing from an atexit hook we may be in the VMThread.
3924 if (t->is_Java_thread()) {
3925 // If the thread has been attached this operation is a no-op
3926 *(JNIEnv**)penv = JavaThread::cast(t)->jni_environment();
3927 return JNI_OK;
3928 } else {
3929 return JNI_ERR;
3930 }
3931 }
3932
3933 // Create a thread and mark it as attaching so it will be skipped by the
3934 // ThreadsListEnumerator - see CR 6404306
3935 JavaThread* thread = new JavaThread(true);
3936
3937 // Set correct safepoint info. The thread is going to call into Java when
3938 // initializing the Java level thread object. Hence, the correct state must
3939 // be set in order for the Safepoint code to deal with it correctly.
3940 thread->set_thread_state(_thread_in_vm);
3941 thread->record_stack_base_and_size();
3942 thread->register_thread_stack_with_NMT();
3943 thread->initialize_thread_current();
3944 MACOS_AARCH64_ONLY(thread->init_wx());
3945
3946 if (!os::create_attached_thread(thread)) {
3947 thread->smr_delete();
3948 return JNI_ERR;
3949 }
3950 // Enable stack overflow checks
3951 thread->stack_overflow_state()->create_stack_guard_pages();
3952
3953 thread->initialize_tlab();
3954
3955 thread->cache_global_variables();
3956
3957 // This thread will not do a safepoint check, since it has
3958 // not been added to the Thread list yet.
3959 { MutexLocker ml(Threads_lock);
3960 // This must be inside this lock in order to get FullGCALot to work properly, i.e., to
3961 // avoid this thread trying to do a GC before it is added to the thread-list
3962 thread->set_active_handles(JNIHandleBlock::allocate_block());
3963 Threads::add(thread, daemon);
3964 }
3965 // Create thread group and name info from attach arguments
3966 oop group = NULL;
3967 char* thread_name = NULL;
3968 if (args != NULL && Threads::is_supported_jni_version(args->version)) {
3969 group = JNIHandles::resolve(args->group);
3970 thread_name = args->name; // may be NULL
3971 }
3972 if (group == NULL) group = Universe::main_thread_group();
3973
3974 // Create Java level thread object and attach it to this thread
3975 bool attach_failed = false;
3976 {
3977 EXCEPTION_MARK;
3978 HandleMark hm(THREAD);
3979 Handle thread_group(THREAD, group);
3980 thread->allocate_threadObj(thread_group, thread_name, daemon, THREAD);
3981 if (HAS_PENDING_EXCEPTION) {
3982 CLEAR_PENDING_EXCEPTION;
3983 // cleanup outside the handle mark.
3984 attach_failed = true;
3985 }
3986 }
3987
3988 if (attach_failed) {
3989 // Added missing cleanup
3990 thread->cleanup_failed_attach_current_thread(daemon);
3991 return JNI_ERR;
3992 }
3993
3994 // mark the thread as no longer attaching
3995 // this uses a fence to push the change through so we don't have
3996 // to regrab the threads_lock
3997 thread->set_done_attaching_via_jni();
3998
3999 // Set java thread status.
4000 java_lang_Thread::set_thread_status(thread->threadObj(),
4001 JavaThreadStatus::RUNNABLE);
4002
4003 // Notify the debugger
4004 if (JvmtiExport::should_post_thread_life()) {
4005 JvmtiExport::post_thread_start(thread);
4006 }
4007
4008 post_thread_start_event(thread);
4009
4010 *(JNIEnv**)penv = thread->jni_environment();
4011
4012 // Now leaving the VM, so change thread_state. This is normally automatically taken care
4013 // of in the JVM_ENTRY. But in this situation we have to do it manually.
4014 ThreadStateTransition::transition_from_vm(thread, _thread_in_native);
4015 MACOS_AARCH64_ONLY(thread->enable_wx(WXExec));
4016
4017 // Perform any platform dependent FPU setup
4018 os::setup_fpu();
4019
4020 return JNI_OK;
4021 }
4022
4023
4024 jint JNICALL jni_AttachCurrentThread(JavaVM *vm, void **penv, void *_args) {
4025 HOTSPOT_JNI_ATTACHCURRENTTHREAD_ENTRY(vm, penv, _args);
4026 if (vm_created == 0) {
4027 HOTSPOT_JNI_ATTACHCURRENTTHREAD_RETURN((uint32_t) JNI_ERR);
4028 return JNI_ERR;
4029 }
4030
4031 jint ret = attach_current_thread(vm, penv, _args, false);
4032 HOTSPOT_JNI_ATTACHCURRENTTHREAD_RETURN(ret);
4033 return ret;
4034 }
4035
4036
4037 jint JNICALL jni_DetachCurrentThread(JavaVM *vm) {
4038 HOTSPOT_JNI_DETACHCURRENTTHREAD_ENTRY(vm);
4039 if (vm_created == 0) {
4040 HOTSPOT_JNI_DETACHCURRENTTHREAD_RETURN(JNI_ERR);
4041 return JNI_ERR;
4042 }
4043
4044 Thread* current = Thread::current_or_null();
4045
4046 // If the thread has already been detached the operation is a no-op
4047 if (current == NULL) {
4048 HOTSPOT_JNI_DETACHCURRENTTHREAD_RETURN(JNI_OK);
4049 return JNI_OK;
4050 }
4051
4052 // If executing from an atexit hook we may be in the VMThread.
4053 if (!current->is_Java_thread()) {
4054 HOTSPOT_JNI_DETACHCURRENTTHREAD_RETURN((uint32_t) JNI_ERR);
4055 return JNI_ERR;
4056 }
4057
4058 VM_Exit::block_if_vm_exited();
4059
4060 JavaThread* thread = JavaThread::cast(current);
4061 if (thread->has_last_Java_frame()) {
4062 HOTSPOT_JNI_DETACHCURRENTTHREAD_RETURN((uint32_t) JNI_ERR);
4063 // Can't detach a thread that's running java, that can't work.
4064 return JNI_ERR;
4065 }
4066
4067 // We are going to VM, change W^X state to the expected one.
4068 MACOS_AARCH64_ONLY(thread->enable_wx(WXWrite));
4069
4070 // Safepoint support. Have to do call-back to safepoint code, if in the
4071 // middle of a safepoint operation
4072 ThreadStateTransition::transition_from_native(thread, _thread_in_vm);
4073
4074 // XXX: Note that JavaThread::exit() call below removes the guards on the
4075 // stack pages set up via enable_stack_{red,yellow}_zone() calls
4076 // above in jni_AttachCurrentThread. Unfortunately, while the setting
4077 // of the guards is visible in jni_AttachCurrentThread above,
4078 // the removal of the guards is buried below in JavaThread::exit()
4079 // here. The abstraction should be more symmetrically either exposed
4080 // or hidden (e.g. it could probably be hidden in the same
4081 // (platform-dependent) methods where we do alternate stack
4082 // maintenance work?)
4083 thread->exit(false, JavaThread::jni_detach);
4084 thread->smr_delete();
4085
4086 // Go to the execute mode, the initial state of the thread on creation.
4087 // Use os interface as the thread is not a JavaThread anymore.
4088 MACOS_AARCH64_ONLY(os::current_thread_enable_wx(WXExec));
4089
4090 HOTSPOT_JNI_DETACHCURRENTTHREAD_RETURN(JNI_OK);
4091 return JNI_OK;
4092 }
4093
4094 DT_RETURN_MARK_DECL(GetEnv, jint
4095 , HOTSPOT_JNI_GETENV_RETURN(_ret_ref));
4096
4097 jint JNICALL jni_GetEnv(JavaVM *vm, void **penv, jint version) {
4098 HOTSPOT_JNI_GETENV_ENTRY(vm, penv, version);
4099 jint ret = JNI_ERR;
4100 DT_RETURN_MARK(GetEnv, jint, (const jint&)ret);
4101
4102 if (vm_created == 0) {
4103 *penv = NULL;
4104 ret = JNI_EDETACHED;
4105 return ret;
4106 }
4107
4108 // No JVM TI with --enable-preview and no continuations support.
4109 if (!VMContinuations && Arguments::enable_preview() && JvmtiExport::is_jvmti_version(version)) {
4110 *penv = NULL;
4111 ret = JNI_EVERSION;
4112 return ret;
4113 }
4114
4115 if (JniExportedInterface::GetExportedInterface(vm, penv, version, &ret)) {
4116 return ret;
4117 }
4118
4119 #ifndef JVMPI_VERSION_1
4120 // need these in order to be polite about older agents
4121 #define JVMPI_VERSION_1 ((jint)0x10000001)
4122 #define JVMPI_VERSION_1_1 ((jint)0x10000002)
4123 #define JVMPI_VERSION_1_2 ((jint)0x10000003)
4124 #endif // !JVMPI_VERSION_1
4125
4126 Thread* thread = Thread::current_or_null();
4127 if (thread != NULL && thread->is_Java_thread()) {
4128 if (Threads::is_supported_jni_version_including_1_1(version)) {
4129 *(JNIEnv**)penv = JavaThread::cast(thread)->jni_environment();
4130 ret = JNI_OK;
4131 return ret;
4132
4133 } else if (version == JVMPI_VERSION_1 ||
4134 version == JVMPI_VERSION_1_1 ||
4135 version == JVMPI_VERSION_1_2) {
4136 tty->print_cr("ERROR: JVMPI, an experimental interface, is no longer supported.");
4137 tty->print_cr("Please use the supported interface: the JVM Tool Interface (JVM TI).");
4138 ret = JNI_EVERSION;
4139 return ret;
4140 } else if (JvmtiExport::is_jvmdi_version(version)) {
4141 tty->print_cr("FATAL ERROR: JVMDI is no longer supported.");
4142 tty->print_cr("Please use the supported interface: the JVM Tool Interface (JVM TI).");
4143 ret = JNI_EVERSION;
4144 return ret;
4145 } else {
4146 *penv = NULL;
4147 ret = JNI_EVERSION;
4148 return ret;
4149 }
4150 } else {
4151 *penv = NULL;
4152 ret = JNI_EDETACHED;
4153 return ret;
4154 }
4155 }
4156
4157
4158 jint JNICALL jni_AttachCurrentThreadAsDaemon(JavaVM *vm, void **penv, void *_args) {
4159 HOTSPOT_JNI_ATTACHCURRENTTHREADASDAEMON_ENTRY(vm, penv, _args);
4160 if (vm_created == 0) {
4161 HOTSPOT_JNI_ATTACHCURRENTTHREADASDAEMON_RETURN((uint32_t) JNI_ERR);
4162 return JNI_ERR;
4163 }
4164
4165 jint ret = attach_current_thread(vm, penv, _args, true);
4166 HOTSPOT_JNI_ATTACHCURRENTTHREADASDAEMON_RETURN(ret);
4167 return ret;
4168 }
4169
4170
4171 } // End extern "C"
4172
4173 const struct JNIInvokeInterface_ jni_InvokeInterface = {
4174 NULL,
4175 NULL,
4176 NULL,
4177
4178 jni_DestroyJavaVM,
4179 jni_AttachCurrentThread,
4180 jni_DetachCurrentThread,
4181 jni_GetEnv,
4182 jni_AttachCurrentThreadAsDaemon
4183 };