1 /*
2 * Copyright (c) 1997, 2023, 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 "jni.h"
48 #include "jvm.h"
49 #include "logging/log.hpp"
50 #include "memory/allocation.hpp"
51 #include "memory/allocation.inline.hpp"
52 #include "memory/oopFactory.hpp"
53 #include "memory/resourceArea.hpp"
54 #include "memory/universe.hpp"
55 #include "oops/access.inline.hpp"
56 #include "oops/arrayOop.hpp"
57 #include "oops/flatArrayOop.inline.hpp"
58 #include "oops/inlineKlass.inline.hpp"
59 #include "oops/instanceKlass.inline.hpp"
60 #include "oops/instanceOop.hpp"
61 #include "oops/klass.inline.hpp"
62 #include "oops/markWord.hpp"
63 #include "oops/method.hpp"
64 #include "oops/objArrayKlass.hpp"
65 #include "oops/objArrayOop.inline.hpp"
66 #include "oops/oop.inline.hpp"
67 #include "oops/symbol.hpp"
68 #include "oops/typeArrayKlass.hpp"
69 #include "oops/typeArrayOop.inline.hpp"
70 #include "prims/jniCheck.hpp"
71 #include "prims/jniExport.hpp"
72 #include "prims/jniFastGetField.hpp"
73 #include "prims/jvm_misc.hpp"
74 #include "prims/jvmtiExport.hpp"
75 #include "prims/jvmtiThreadState.hpp"
76 #include "runtime/arguments.hpp"
77 #include "runtime/atomic.hpp"
78 #include "runtime/fieldDescriptor.inline.hpp"
79 #include "runtime/handles.inline.hpp"
80 #include "runtime/interfaceSupport.inline.hpp"
81 #include "runtime/java.hpp"
82 #include "runtime/javaCalls.hpp"
83 #include "runtime/javaThread.inline.hpp"
84 #include "runtime/jfieldIDWorkaround.hpp"
85 #include "runtime/jniHandles.inline.hpp"
86 #include "runtime/reflection.hpp"
87 #include "runtime/safepointVerifiers.hpp"
88 #include "runtime/sharedRuntime.hpp"
89 #include "runtime/signature.hpp"
90 #include "runtime/synchronizer.hpp"
91 #include "runtime/thread.inline.hpp"
92 #include "runtime/vmOperations.hpp"
93 #include "services/memTracker.hpp"
94 #include "services/runtimeService.hpp"
95 #include "utilities/defaultStream.hpp"
96 #include "utilities/dtrace.hpp"
97 #include "utilities/events.hpp"
98 #include "utilities/macros.hpp"
99 #include "utilities/vmError.hpp"
100 #if INCLUDE_JVMCI
101 #include "jvmci/jvmciCompiler.hpp"
102 #endif
103 #if INCLUDE_JFR
104 #include "jfr/jfr.hpp"
105 #endif
106
107 static jint CurrentVersion = JNI_VERSION_21;
108
109 #if defined(_WIN32) && !defined(USE_VECTORED_EXCEPTION_HANDLING)
110 extern LONG WINAPI topLevelExceptionFilter(_EXCEPTION_POINTERS* );
111 #endif
112
113 // The DT_RETURN_MARK macros create a scoped object to fire the dtrace
114 // '-return' probe regardless of the return path is taken out of the function.
115 // Methods that have multiple return paths use this to avoid having to
116 // instrument each return path. Methods that use CHECK or THROW must use this
117 // since those macros can cause an immediate uninstrumented return.
118 //
119 // In order to get the return value, a reference to the variable containing
120 // the return value must be passed to the constructor of the object, and
121 // the return value must be set before return (since the mark object has
122 // a reference to it).
123 //
124 // Example:
125 // DT_RETURN_MARK_DECL(SomeFunc, int);
126 // JNI_ENTRY(int, SomeFunc, ...)
127 // int return_value = 0;
128 // DT_RETURN_MARK(SomeFunc, int, (const int&)return_value);
129 // foo(CHECK_0)
130 // return_value = 5;
131 // return return_value;
132 // JNI_END
133 #define DT_RETURN_MARK_DECL(name, type, probe) \
134 DTRACE_ONLY( \
135 class DTraceReturnProbeMark_##name { \
136 public: \
137 const type& _ret_ref; \
138 DTraceReturnProbeMark_##name(const type& v) : _ret_ref(v) {} \
139 ~DTraceReturnProbeMark_##name() { \
140 probe; \
141 } \
142 } \
143 )
144 // Void functions are simpler since there's no return value
145 #define DT_VOID_RETURN_MARK_DECL(name, probe) \
146 DTRACE_ONLY( \
147 class DTraceReturnProbeMark_##name { \
148 public: \
149 ~DTraceReturnProbeMark_##name() { \
150 probe; \
151 } \
152 } \
153 )
154
155 // Place these macros in the function to mark the return. Non-void
156 // functions need the type and address of the return value.
157 #define DT_RETURN_MARK(name, type, ref) \
158 DTRACE_ONLY( DTraceReturnProbeMark_##name dtrace_return_mark(ref) )
159 #define DT_VOID_RETURN_MARK(name) \
160 DTRACE_ONLY( DTraceReturnProbeMark_##name dtrace_return_mark )
161
162
163 // Use these to select distinct code for floating-point vs. non-floating point
164 // situations. Used from within common macros where we need slightly
165 // different behavior for Float/Double
166 #define FP_SELECT_Boolean(intcode, fpcode) intcode
167 #define FP_SELECT_Byte(intcode, fpcode) intcode
168 #define FP_SELECT_Char(intcode, fpcode) intcode
169 #define FP_SELECT_Short(intcode, fpcode) intcode
170 #define FP_SELECT_Object(intcode, fpcode) intcode
171 #define FP_SELECT_Int(intcode, fpcode) intcode
172 #define FP_SELECT_Long(intcode, fpcode) intcode
173 #define FP_SELECT_Float(intcode, fpcode) fpcode
174 #define FP_SELECT_Double(intcode, fpcode) fpcode
175 #define FP_SELECT(TypeName, intcode, fpcode) \
176 FP_SELECT_##TypeName(intcode, fpcode)
177
178 // Choose DT_RETURN_MARK macros based on the type: float/double -> void
179 // (dtrace doesn't do FP yet)
180 #define DT_RETURN_MARK_DECL_FOR(TypeName, name, type, probe) \
181 FP_SELECT(TypeName, \
182 DT_RETURN_MARK_DECL(name, type, probe), DT_VOID_RETURN_MARK_DECL(name, probe) )
183 #define DT_RETURN_MARK_FOR(TypeName, name, type, ref) \
184 FP_SELECT(TypeName, \
185 DT_RETURN_MARK(name, type, ref), DT_VOID_RETURN_MARK(name) )
186
187
188 // out-of-line helpers for class jfieldIDWorkaround:
189
190 bool jfieldIDWorkaround::is_valid_jfieldID(Klass* k, jfieldID id) {
191 if (jfieldIDWorkaround::is_instance_jfieldID(k, id)) {
192 uintptr_t as_uint = (uintptr_t) id;
193 intptr_t offset = raw_instance_offset(id);
194 if (is_checked_jfieldID(id)) {
195 if (!klass_hash_ok(k, id)) {
196 return false;
197 }
198 }
199 return InstanceKlass::cast(k)->contains_field_offset(offset);
200 } else {
201 JNIid* result = (JNIid*) id;
202 #ifdef ASSERT
203 return result != nullptr && result->is_static_field_id();
204 #else
205 return result != nullptr;
206 #endif
207 }
208 }
209
210
211 intptr_t jfieldIDWorkaround::encode_klass_hash(Klass* k, intptr_t offset) {
212 if (offset <= small_offset_mask) {
213 Klass* field_klass = k;
214 Klass* super_klass = field_klass->super();
215 // With compressed oops the most super class with nonstatic fields would
216 // be the owner of fields embedded in the header.
217 while (InstanceKlass::cast(super_klass)->has_nonstatic_fields() &&
218 InstanceKlass::cast(super_klass)->contains_field_offset(offset)) {
219 field_klass = super_klass; // super contains the field also
220 super_klass = field_klass->super();
221 }
222 debug_only(NoSafepointVerifier nosafepoint;)
223 uintptr_t klass_hash = field_klass->identity_hash();
224 return ((klass_hash & klass_mask) << klass_shift) | checked_mask_in_place;
225 } else {
226 #if 0
227 #ifndef PRODUCT
228 {
229 ResourceMark rm;
230 warning("VerifyJNIFields: long offset %d in %s", offset, k->external_name());
231 }
232 #endif
233 #endif
234 return 0;
235 }
236 }
237
238 bool jfieldIDWorkaround::klass_hash_ok(Klass* k, jfieldID id) {
239 uintptr_t as_uint = (uintptr_t) id;
240 intptr_t klass_hash = (as_uint >> klass_shift) & klass_mask;
241 do {
242 debug_only(NoSafepointVerifier nosafepoint;)
243 // Could use a non-blocking query for identity_hash here...
244 if ((k->identity_hash() & klass_mask) == klass_hash)
245 return true;
246 k = k->super();
247 } while (k != nullptr);
248 return false;
249 }
250
251 void jfieldIDWorkaround::verify_instance_jfieldID(Klass* k, jfieldID id) {
252 guarantee(jfieldIDWorkaround::is_instance_jfieldID(k, id), "must be an instance field" );
253 uintptr_t as_uint = (uintptr_t) id;
254 intptr_t offset = raw_instance_offset(id);
255 if (VerifyJNIFields) {
256 if (is_checked_jfieldID(id)) {
257 guarantee(klass_hash_ok(k, id),
258 "Bug in native code: jfieldID class must match object");
259 } else {
260 #if 0
261 #ifndef PRODUCT
262 if (Verbose) {
263 ResourceMark rm;
264 warning("VerifyJNIFields: unverified offset %d for %s", offset, k->external_name());
265 }
266 #endif
267 #endif
268 }
269 }
270 guarantee(InstanceKlass::cast(k)->contains_field_offset(offset),
271 "Bug in native code: jfieldID offset must address interior of object");
272 }
273
274 // Implementation of JNI entries
275
276 DT_RETURN_MARK_DECL(DefineClass, jclass
277 , HOTSPOT_JNI_DEFINECLASS_RETURN(_ret_ref));
278
279 JNI_ENTRY(jclass, jni_DefineClass(JNIEnv *env, const char *name, jobject loaderRef,
280 const jbyte *buf, jsize bufLen))
281 HOTSPOT_JNI_DEFINECLASS_ENTRY(
282 env, (char*) name, loaderRef, (char*) buf, bufLen);
283
284 jclass cls = nullptr;
285 DT_RETURN_MARK(DefineClass, jclass, (const jclass&)cls);
286
287 // Class resolution will get the class name from the .class stream if the name is null.
288 TempNewSymbol class_name = name == nullptr ? nullptr :
289 SystemDictionary::class_name_symbol(name, vmSymbols::java_lang_NoClassDefFoundError(),
290 CHECK_NULL);
291
292 ResourceMark rm(THREAD);
293 ClassFileStream st((u1*)buf, bufLen, nullptr, ClassFileStream::verify);
294 Handle class_loader (THREAD, JNIHandles::resolve(loaderRef));
295 Handle protection_domain;
296 ClassLoadInfo cl_info(protection_domain);
297 Klass* k = SystemDictionary::resolve_from_stream(&st, class_name,
298 class_loader,
299 cl_info,
300 CHECK_NULL);
301
302 if (log_is_enabled(Debug, class, resolve)) {
303 trace_class_resolution(k);
304 }
305
306 cls = (jclass)JNIHandles::make_local(THREAD, k->java_mirror());
307 return cls;
308 JNI_END
309
310
311
312 DT_RETURN_MARK_DECL(FindClass, jclass
313 , HOTSPOT_JNI_FINDCLASS_RETURN(_ret_ref));
314
315 JNI_ENTRY(jclass, jni_FindClass(JNIEnv *env, const char *name))
316 HOTSPOT_JNI_FINDCLASS_ENTRY(env, (char *)name);
317
318 jclass result = nullptr;
319 DT_RETURN_MARK(FindClass, jclass, (const jclass&)result);
320
321 // This should be ClassNotFoundException imo.
322 TempNewSymbol class_name =
323 SystemDictionary::class_name_symbol(name, vmSymbols::java_lang_NoClassDefFoundError(),
324 CHECK_NULL);
325
326 //%note jni_3
327 Handle protection_domain;
328 // Find calling class
329 Klass* k = thread->security_get_caller_class(0);
330 // default to the system loader when no context
331 Handle loader(THREAD, SystemDictionary::java_system_loader());
332 if (k != nullptr) {
333 // Special handling to make sure JNI_OnLoad and JNI_OnUnload are executed
334 // in the correct class context.
335 if (k->class_loader() == nullptr &&
336 k->name() == vmSymbols::jdk_internal_loader_NativeLibraries()) {
337 JavaValue result(T_OBJECT);
338 JavaCalls::call_static(&result, k,
339 vmSymbols::getFromClass_name(),
340 vmSymbols::void_class_signature(),
341 CHECK_NULL);
342 // When invoked from JNI_OnLoad, NativeLibraries::getFromClass returns
343 // a non-null Class object. When invoked from JNI_OnUnload,
344 // it will return null to indicate no context.
345 oop mirror = result.get_oop();
346 if (mirror != nullptr) {
347 Klass* fromClass = java_lang_Class::as_Klass(mirror);
348 loader = Handle(THREAD, fromClass->class_loader());
349 protection_domain = Handle(THREAD, fromClass->protection_domain());
350 }
351 } else {
352 loader = Handle(THREAD, k->class_loader());
353 }
354 }
355
356 result = find_class_from_class_loader(env, class_name, true, loader,
357 protection_domain, true, thread);
358
359 if (log_is_enabled(Debug, class, resolve) && result != nullptr) {
360 trace_class_resolution(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(result)));
361 }
362
363 return result;
364 JNI_END
365
366 DT_RETURN_MARK_DECL(FromReflectedMethod, jmethodID
367 , HOTSPOT_JNI_FROMREFLECTEDMETHOD_RETURN((uintptr_t)_ret_ref));
368
369 JNI_ENTRY(jmethodID, jni_FromReflectedMethod(JNIEnv *env, jobject method))
370 HOTSPOT_JNI_FROMREFLECTEDMETHOD_ENTRY(env, method);
371
372 jmethodID ret = nullptr;
373 DT_RETURN_MARK(FromReflectedMethod, jmethodID, (const jmethodID&)ret);
374
375 // method is a handle to a java.lang.reflect.Method object
376 oop reflected = JNIHandles::resolve_non_null(method);
377 oop mirror = nullptr;
378 int slot = 0;
379
380 if (reflected->klass() == vmClasses::reflect_Constructor_klass()) {
381 mirror = java_lang_reflect_Constructor::clazz(reflected);
382 slot = java_lang_reflect_Constructor::slot(reflected);
383 } else {
384 assert(reflected->klass() == vmClasses::reflect_Method_klass(), "wrong type");
385 mirror = java_lang_reflect_Method::clazz(reflected);
386 slot = java_lang_reflect_Method::slot(reflected);
387 }
388 Klass* k1 = java_lang_Class::as_Klass(mirror);
389
390 // Make sure class is initialized before handing id's out to methods
391 k1->initialize(CHECK_NULL);
392 Method* m = InstanceKlass::cast(k1)->method_with_idnum(slot);
393 ret = m==nullptr? nullptr : m->jmethod_id(); // return null if reflected method deleted
394 return ret;
395 JNI_END
396
397 DT_RETURN_MARK_DECL(FromReflectedField, jfieldID
398 , HOTSPOT_JNI_FROMREFLECTEDFIELD_RETURN((uintptr_t)_ret_ref));
399
400 JNI_ENTRY(jfieldID, jni_FromReflectedField(JNIEnv *env, jobject field))
401 HOTSPOT_JNI_FROMREFLECTEDFIELD_ENTRY(env, field);
402
403 jfieldID ret = nullptr;
404 DT_RETURN_MARK(FromReflectedField, jfieldID, (const jfieldID&)ret);
405
406 // field is a handle to a java.lang.reflect.Field object
407 oop reflected = JNIHandles::resolve_non_null(field);
408 oop mirror = java_lang_reflect_Field::clazz(reflected);
409 Klass* k1 = java_lang_Class::as_Klass(mirror);
410 int slot = java_lang_reflect_Field::slot(reflected);
411 int modifiers = java_lang_reflect_Field::modifiers(reflected);
412
413 // Make sure class is initialized before handing id's out to fields
414 k1->initialize(CHECK_NULL);
415
416 // First check if this is a static field
417 if (modifiers & JVM_ACC_STATIC) {
418 intptr_t offset = InstanceKlass::cast(k1)->field_offset( slot );
419 JNIid* id = InstanceKlass::cast(k1)->jni_id_for(offset);
420 assert(id != nullptr, "corrupt Field object");
421 debug_only(id->set_is_static_field_id();)
422 // A jfieldID for a static field is a JNIid specifying the field holder and the offset within the Klass*
423 ret = jfieldIDWorkaround::to_static_jfieldID(id);
424 return ret;
425 }
426
427 // The slot is the index of the field description in the field-array
428 // The jfieldID is the offset of the field within the object
429 // It may also have hash bits for k, if VerifyJNIFields is turned on.
430 intptr_t offset = InstanceKlass::cast(k1)->field_offset( slot );
431 bool is_flat = InstanceKlass::cast(k1)->field_is_flat(slot);
432 assert(InstanceKlass::cast(k1)->contains_field_offset(offset), "stay within object");
433 ret = jfieldIDWorkaround::to_instance_jfieldID(k1, offset, is_flat);
434 return ret;
435 JNI_END
436
437
438 DT_RETURN_MARK_DECL(ToReflectedMethod, jobject
439 , HOTSPOT_JNI_TOREFLECTEDMETHOD_RETURN(_ret_ref));
440
441 JNI_ENTRY(jobject, jni_ToReflectedMethod(JNIEnv *env, jclass cls, jmethodID method_id, jboolean isStatic))
442 HOTSPOT_JNI_TOREFLECTEDMETHOD_ENTRY(env, cls, (uintptr_t) method_id, isStatic);
443
444 jobject ret = nullptr;
445 DT_RETURN_MARK(ToReflectedMethod, jobject, (const jobject&)ret);
446
447 methodHandle m (THREAD, Method::resolve_jmethod_id(method_id));
448 assert(m->is_static() == (isStatic != 0), "jni_ToReflectedMethod access flags doesn't match");
449 oop reflection_method;
450 if (m->is_object_constructor() || m->is_static_vnew_factory()) {
451 reflection_method = Reflection::new_constructor(m, CHECK_NULL);
452 } else {
453 reflection_method = Reflection::new_method(m, false, CHECK_NULL);
454 }
455 ret = JNIHandles::make_local(THREAD, reflection_method);
456 return ret;
457 JNI_END
458
459 DT_RETURN_MARK_DECL(GetSuperclass, jclass
460 , HOTSPOT_JNI_GETSUPERCLASS_RETURN(_ret_ref));
461
462 JNI_ENTRY(jclass, jni_GetSuperclass(JNIEnv *env, jclass sub))
463 HOTSPOT_JNI_GETSUPERCLASS_ENTRY(env, sub);
464
465 jclass obj = nullptr;
466 DT_RETURN_MARK(GetSuperclass, jclass, (const jclass&)obj);
467
468 oop mirror = JNIHandles::resolve_non_null(sub);
469 // primitive classes return null
470 if (java_lang_Class::is_primitive(mirror)) return nullptr;
471
472 // Rules of Class.getSuperClass as implemented by KLass::java_super:
473 // arrays return Object
474 // interfaces return null
475 // proper classes return Klass::super()
476 Klass* k = java_lang_Class::as_Klass(mirror);
477 if (k->is_interface()) return nullptr;
478
479 // return mirror for superclass
480 Klass* super = k->java_super();
481 // super2 is the value computed by the compiler's getSuperClass intrinsic:
482 debug_only(Klass* super2 = ( k->is_array_klass()
483 ? vmClasses::Object_klass()
484 : k->super() ) );
485 assert(super == super2,
486 "java_super computation depends on interface, array, other super");
487 obj = (super == nullptr) ? nullptr : (jclass) JNIHandles::make_local(THREAD, super->java_mirror());
488 return obj;
489 JNI_END
490
491 JNI_ENTRY_NO_PRESERVE(jboolean, jni_IsAssignableFrom(JNIEnv *env, jclass sub, jclass super))
492 HOTSPOT_JNI_ISASSIGNABLEFROM_ENTRY(env, sub, super);
493
494 oop sub_mirror = JNIHandles::resolve_non_null(sub);
495 oop super_mirror = JNIHandles::resolve_non_null(super);
496 if (java_lang_Class::is_primitive(sub_mirror) ||
497 java_lang_Class::is_primitive(super_mirror)) {
498 jboolean ret = (sub_mirror == super_mirror);
499
500 HOTSPOT_JNI_ISASSIGNABLEFROM_RETURN(ret);
501 return ret;
502 }
503 Klass* sub_klass = java_lang_Class::as_Klass(sub_mirror);
504 Klass* super_klass = java_lang_Class::as_Klass(super_mirror);
505 assert(sub_klass != nullptr && super_klass != nullptr, "invalid arguments to jni_IsAssignableFrom");
506 jboolean ret;
507 if (sub_klass == super_klass && sub_klass->is_inline_klass()) {
508 // val type is a subtype of ref type
509 InlineKlass* ik = InlineKlass::cast(sub_klass);
510 if (sub_mirror == super_mirror || (ik->val_mirror() == sub_mirror && ik->ref_mirror() == super_mirror)) {
511 ret = JNI_TRUE;
512 } else {
513 ret = JNI_FALSE;
514 }
515 } else {
516 ret = sub_klass->is_subtype_of(super_klass) ? JNI_TRUE : JNI_FALSE;
517 }
518 HOTSPOT_JNI_ISASSIGNABLEFROM_RETURN(ret);
519 return ret;
520 JNI_END
521
522
523 DT_RETURN_MARK_DECL(Throw, jint
524 , HOTSPOT_JNI_THROW_RETURN(_ret_ref));
525
526 JNI_ENTRY(jint, jni_Throw(JNIEnv *env, jthrowable obj))
527 HOTSPOT_JNI_THROW_ENTRY(env, obj);
528
529 jint ret = JNI_OK;
530 DT_RETURN_MARK(Throw, jint, (const jint&)ret);
531
532 THROW_OOP_(JNIHandles::resolve(obj), JNI_OK);
533 ShouldNotReachHere();
534 return 0; // Mute compiler.
535 JNI_END
536
537
538 DT_RETURN_MARK_DECL(ThrowNew, jint
539 , HOTSPOT_JNI_THROWNEW_RETURN(_ret_ref));
540
541 JNI_ENTRY(jint, jni_ThrowNew(JNIEnv *env, jclass clazz, const char *message))
542 HOTSPOT_JNI_THROWNEW_ENTRY(env, clazz, (char *) message);
543
544 jint ret = JNI_OK;
545 DT_RETURN_MARK(ThrowNew, jint, (const jint&)ret);
546
547 InstanceKlass* k = InstanceKlass::cast(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz)));
548 Symbol* name = k->name();
549 Handle class_loader (THREAD, k->class_loader());
550 Handle protection_domain (THREAD, k->protection_domain());
551 THROW_MSG_LOADER_(name, (char *)message, class_loader, protection_domain, JNI_OK);
552 ShouldNotReachHere();
553 return 0; // Mute compiler.
554 JNI_END
555
556
557 // JNI functions only transform a pending async exception to a synchronous
558 // exception in ExceptionOccurred and ExceptionCheck calls, since
559 // delivering an async exception in other places won't change the native
560 // code's control flow and would be harmful when native code further calls
561 // JNI functions with a pending exception. Async exception is also checked
562 // during the call, so ExceptionOccurred/ExceptionCheck won't return
563 // false but deliver the async exception at the very end during
564 // state transition.
565
566 static void jni_check_async_exceptions(JavaThread *thread) {
567 assert(thread == Thread::current(), "must be itself");
568 if (thread->has_async_exception_condition()) {
569 SafepointMechanism::process_if_requested_with_exit_check(thread, true /* check asyncs */);
570 }
571 }
572
573 JNI_ENTRY_NO_PRESERVE(jthrowable, jni_ExceptionOccurred(JNIEnv *env))
574 HOTSPOT_JNI_EXCEPTIONOCCURRED_ENTRY(env);
575
576 jni_check_async_exceptions(thread);
577 oop exception = thread->pending_exception();
578 jthrowable ret = (jthrowable) JNIHandles::make_local(THREAD, exception);
579
580 HOTSPOT_JNI_EXCEPTIONOCCURRED_RETURN(ret);
581 return ret;
582 JNI_END
583
584
585 JNI_ENTRY_NO_PRESERVE(void, jni_ExceptionDescribe(JNIEnv *env))
586 HOTSPOT_JNI_EXCEPTIONDESCRIBE_ENTRY(env);
587
588 if (thread->has_pending_exception()) {
589 Handle ex(thread, thread->pending_exception());
590 thread->clear_pending_exception();
591 jio_fprintf(defaultStream::error_stream(), "Exception ");
592 if (thread != nullptr && thread->threadObj() != nullptr) {
593 ResourceMark rm(THREAD);
594 jio_fprintf(defaultStream::error_stream(),
595 "in thread \"%s\" ", thread->name());
596 }
597 if (ex->is_a(vmClasses::Throwable_klass())) {
598 JavaValue result(T_VOID);
599 JavaCalls::call_virtual(&result,
600 ex,
601 vmClasses::Throwable_klass(),
602 vmSymbols::printStackTrace_name(),
603 vmSymbols::void_method_signature(),
604 THREAD);
605 // If an exception is thrown in the call it gets thrown away. Not much
606 // we can do with it. The native code that calls this, does not check
607 // for the exception - hence, it might still be in the thread when DestroyVM gets
608 // called, potentially causing a few asserts to trigger - since no pending exception
609 // is expected.
610 CLEAR_PENDING_EXCEPTION;
611 } else {
612 ResourceMark rm(THREAD);
613 jio_fprintf(defaultStream::error_stream(),
614 ". Uncaught exception of type %s.",
615 ex->klass()->external_name());
616 }
617 }
618
619 HOTSPOT_JNI_EXCEPTIONDESCRIBE_RETURN();
620 JNI_END
621
622
623 JNI_ENTRY_NO_PRESERVE(void, jni_ExceptionClear(JNIEnv *env))
624 HOTSPOT_JNI_EXCEPTIONCLEAR_ENTRY(env);
625
626 // The jni code might be using this API to clear java thrown exception.
627 // So just mark jvmti thread exception state as exception caught.
628 JvmtiThreadState *state = JavaThread::current()->jvmti_thread_state();
629 if (state != nullptr && state->is_exception_detected()) {
630 state->set_exception_caught();
631 }
632 thread->clear_pending_exception();
633
634 HOTSPOT_JNI_EXCEPTIONCLEAR_RETURN();
635 JNI_END
636
637
638 JNI_ENTRY(void, jni_FatalError(JNIEnv *env, const char *msg))
639 HOTSPOT_JNI_FATALERROR_ENTRY(env, (char *) msg);
640
641 tty->print_cr("FATAL ERROR in native method: %s", msg);
642 thread->print_jni_stack();
643 os::abort(); // Dump core and abort
644 JNI_END
645
646
647 JNI_ENTRY(jint, jni_PushLocalFrame(JNIEnv *env, jint capacity))
648 HOTSPOT_JNI_PUSHLOCALFRAME_ENTRY(env, capacity);
649
650 //%note jni_11
651 if (capacity < 0 ||
652 ((MaxJNILocalCapacity > 0) && (capacity > MaxJNILocalCapacity))) {
653 HOTSPOT_JNI_PUSHLOCALFRAME_RETURN((uint32_t)JNI_ERR);
654 return JNI_ERR;
655 }
656
657 thread->push_jni_handle_block();
658 jint ret = JNI_OK;
659 HOTSPOT_JNI_PUSHLOCALFRAME_RETURN(ret);
660 return ret;
661 JNI_END
662
663
664 JNI_ENTRY(jobject, jni_PopLocalFrame(JNIEnv *env, jobject result))
665 HOTSPOT_JNI_POPLOCALFRAME_ENTRY(env, result);
666
667 //%note jni_11
668 Handle result_handle(thread, JNIHandles::resolve(result));
669 JNIHandleBlock* old_handles = thread->active_handles();
670 JNIHandleBlock* new_handles = old_handles->pop_frame_link();
671 if (new_handles != nullptr) {
672 // As a sanity check we only release the handle blocks if the pop_frame_link is not null.
673 // This way code will still work if PopLocalFrame is called without a corresponding
674 // PushLocalFrame call. Note that we set the pop_frame_link to null explicitly, otherwise
675 // the release_block call will release the blocks.
676 thread->set_active_handles(new_handles);
677 old_handles->set_pop_frame_link(nullptr); // clear link we won't release new_handles below
678 JNIHandleBlock::release_block(old_handles, thread); // may block
679 result = JNIHandles::make_local(thread, result_handle());
680 }
681 HOTSPOT_JNI_POPLOCALFRAME_RETURN(result);
682 return result;
683 JNI_END
684
685
686 JNI_ENTRY(jobject, jni_NewGlobalRef(JNIEnv *env, jobject ref))
687 HOTSPOT_JNI_NEWGLOBALREF_ENTRY(env, ref);
688
689 Handle ref_handle(thread, JNIHandles::resolve(ref));
690 jobject ret = JNIHandles::make_global(ref_handle, AllocFailStrategy::RETURN_NULL);
691
692 HOTSPOT_JNI_NEWGLOBALREF_RETURN(ret);
693 return ret;
694 JNI_END
695
696 // Must be JNI_ENTRY (with HandleMark)
697 JNI_ENTRY_NO_PRESERVE(void, jni_DeleteGlobalRef(JNIEnv *env, jobject ref))
698 HOTSPOT_JNI_DELETEGLOBALREF_ENTRY(env, ref);
699
700 JNIHandles::destroy_global(ref);
701
702 HOTSPOT_JNI_DELETEGLOBALREF_RETURN();
703 JNI_END
704
705 JNI_ENTRY_NO_PRESERVE(void, jni_DeleteLocalRef(JNIEnv *env, jobject obj))
706 HOTSPOT_JNI_DELETELOCALREF_ENTRY(env, obj);
707
708 JNIHandles::destroy_local(obj);
709
710 HOTSPOT_JNI_DELETELOCALREF_RETURN();
711 JNI_END
712
713 JNI_ENTRY_NO_PRESERVE(jboolean, jni_IsSameObject(JNIEnv *env, jobject r1, jobject r2))
714 HOTSPOT_JNI_ISSAMEOBJECT_ENTRY(env, r1, r2);
715
716 jboolean ret = JNIHandles::is_same_object(r1, r2) ? JNI_TRUE : JNI_FALSE;
717
718 HOTSPOT_JNI_ISSAMEOBJECT_RETURN(ret);
719 return ret;
720 JNI_END
721
722
723 JNI_ENTRY(jobject, jni_NewLocalRef(JNIEnv *env, jobject ref))
724 HOTSPOT_JNI_NEWLOCALREF_ENTRY(env, ref);
725
726 jobject ret = JNIHandles::make_local(THREAD, JNIHandles::resolve(ref),
727 AllocFailStrategy::RETURN_NULL);
728
729 HOTSPOT_JNI_NEWLOCALREF_RETURN(ret);
730 return ret;
731 JNI_END
732
733 JNI_LEAF(jint, jni_EnsureLocalCapacity(JNIEnv *env, jint capacity))
734 HOTSPOT_JNI_ENSURELOCALCAPACITY_ENTRY(env, capacity);
735
736 jint ret;
737 if (capacity >= 0 &&
738 ((MaxJNILocalCapacity <= 0) || (capacity <= MaxJNILocalCapacity))) {
739 ret = JNI_OK;
740 } else {
741 ret = JNI_ERR;
742 }
743
744 HOTSPOT_JNI_ENSURELOCALCAPACITY_RETURN(ret);
745 return ret;
746 JNI_END
747
748 // Return the Handle Type
749 JNI_LEAF(jobjectRefType, jni_GetObjectRefType(JNIEnv *env, jobject obj))
750 HOTSPOT_JNI_GETOBJECTREFTYPE_ENTRY(env, obj);
751
752 jobjectRefType ret = JNIInvalidRefType;
753 if (obj != nullptr) {
754 ret = JNIHandles::handle_type(thread, obj);
755 }
756
757 HOTSPOT_JNI_GETOBJECTREFTYPE_RETURN((void *) ret);
758 return ret;
759 JNI_END
760
761
762 class JNI_ArgumentPusher : public SignatureIterator {
763 protected:
764 JavaCallArguments* _arguments;
765
766 void push_int(jint x) { _arguments->push_int(x); }
767 void push_long(jlong x) { _arguments->push_long(x); }
768 void push_float(jfloat x) { _arguments->push_float(x); }
769 void push_double(jdouble x) { _arguments->push_double(x); }
770 void push_object(jobject x) { _arguments->push_jobject(x); }
771
772 void push_boolean(jboolean b) {
773 // Normalize boolean arguments from native code by converting 1-255 to JNI_TRUE and
774 // 0 to JNI_FALSE. Boolean return values from native are normalized the same in
775 // TemplateInterpreterGenerator::generate_result_handler_for and
776 // SharedRuntime::generate_native_wrapper.
777 push_int(b == 0 ? JNI_FALSE : JNI_TRUE);
778 }
779
780 JNI_ArgumentPusher(Method* method)
781 : SignatureIterator(method->signature(),
782 Fingerprinter(methodHandle(Thread::current(), method)).fingerprint())
783 {
784 _arguments = nullptr;
785 }
786
787 public:
788 virtual void push_arguments_on(JavaCallArguments* arguments) = 0;
789 };
790
791
792 class JNI_ArgumentPusherVaArg : public JNI_ArgumentPusher {
793 va_list _ap;
794
795 void set_ap(va_list rap) {
796 va_copy(_ap, rap);
797 }
798
799 friend class SignatureIterator; // so do_parameters_on can call do_type
800 void do_type(BasicType type) {
801 switch (type) {
802 // these are coerced to int when using va_arg
803 case T_BYTE:
804 case T_CHAR:
805 case T_SHORT:
806 case T_INT: push_int(va_arg(_ap, jint)); break;
807 case T_BOOLEAN: push_boolean((jboolean) va_arg(_ap, jint)); break;
808
809 // each of these paths is exercised by the various jck Call[Static,Nonvirtual,][Void,Int,..]Method[A,V,] tests
810
811 case T_LONG: push_long(va_arg(_ap, jlong)); break;
812 // float is coerced to double w/ va_arg
813 case T_FLOAT: push_float((jfloat) va_arg(_ap, jdouble)); break;
814 case T_DOUBLE: push_double(va_arg(_ap, jdouble)); break;
815
816 case T_ARRAY:
817 case T_OBJECT:
818 case T_PRIMITIVE_OBJECT: push_object(va_arg(_ap, jobject)); break;
819 default: ShouldNotReachHere();
820 }
821 }
822
823 public:
824 JNI_ArgumentPusherVaArg(jmethodID method_id, va_list rap)
825 : JNI_ArgumentPusher(Method::resolve_jmethod_id(method_id)) {
826 set_ap(rap);
827 }
828
829 ~JNI_ArgumentPusherVaArg() {
830 va_end(_ap);
831 }
832
833 virtual void push_arguments_on(JavaCallArguments* arguments) {
834 _arguments = arguments;
835 do_parameters_on(this);
836 }
837 };
838
839
840 class JNI_ArgumentPusherArray : public JNI_ArgumentPusher {
841 protected:
842 const jvalue *_ap;
843
844 inline void set_ap(const jvalue *rap) { _ap = rap; }
845
846 friend class SignatureIterator; // so do_parameters_on can call do_type
847 void do_type(BasicType type) {
848 switch (type) {
849 case T_CHAR: push_int((_ap++)->c); break;
850 case T_SHORT: push_int((_ap++)->s); break;
851 case T_BYTE: push_int((_ap++)->b); break;
852 case T_INT: push_int((_ap++)->i); break;
853 case T_BOOLEAN: push_boolean((_ap++)->z); break;
854 case T_LONG: push_long((_ap++)->j); break;
855 case T_FLOAT: push_float((_ap++)->f); break;
856 case T_DOUBLE: push_double((_ap++)->d); break;
857 case T_ARRAY:
858 case T_OBJECT:
859 case T_PRIMITIVE_OBJECT: push_object((_ap++)->l); break;
860 default: ShouldNotReachHere();
861 }
862 }
863
864 public:
865 JNI_ArgumentPusherArray(jmethodID method_id, const jvalue *rap)
866 : JNI_ArgumentPusher(Method::resolve_jmethod_id(method_id)) {
867 set_ap(rap);
868 }
869
870 virtual void push_arguments_on(JavaCallArguments* arguments) {
871 _arguments = arguments;
872 do_parameters_on(this);
873 }
874 };
875
876
877 enum JNICallType {
878 JNI_STATIC,
879 JNI_VIRTUAL,
880 JNI_NONVIRTUAL
881 };
882
883
884
885 static void jni_invoke_static(JNIEnv *env, JavaValue* result, jobject receiver, JNICallType call_type, jmethodID method_id, JNI_ArgumentPusher *args, TRAPS) {
886 methodHandle method(THREAD, Method::resolve_jmethod_id(method_id));
887
888 // Create object to hold arguments for the JavaCall, and associate it with
889 // the jni parser
890 ResourceMark rm(THREAD);
891 int number_of_parameters = method->size_of_parameters();
892 JavaCallArguments java_args(number_of_parameters);
893
894 assert(method->is_static(), "method should be static");
895
896 // Fill out JavaCallArguments object
897 args->push_arguments_on(&java_args);
898 // Initialize result type
899 result->set_type(args->return_type());
900
901 // Invoke the method. Result is returned as oop.
902 JavaCalls::call(result, method, &java_args, CHECK);
903
904 // Convert result
905 if (is_reference_type(result->get_type())) {
906 result->set_jobject(JNIHandles::make_local(THREAD, result->get_oop()));
907 }
908 }
909
910
911 static void jni_invoke_nonstatic(JNIEnv *env, JavaValue* result, jobject receiver, JNICallType call_type, jmethodID method_id, JNI_ArgumentPusher *args, TRAPS) {
912 oop recv = JNIHandles::resolve(receiver);
913 if (recv == nullptr) {
914 THROW(vmSymbols::java_lang_NullPointerException());
915 }
916 Handle h_recv(THREAD, recv);
917
918 int number_of_parameters;
919 Method* selected_method;
920 {
921 Method* m = Method::resolve_jmethod_id(method_id);
922 number_of_parameters = m->size_of_parameters();
923 InstanceKlass* holder = m->method_holder();
924 if (call_type != JNI_VIRTUAL) {
925 selected_method = m;
926 } else if (!m->has_itable_index()) {
927 // non-interface call -- for that little speed boost, don't handlize
928 debug_only(NoSafepointVerifier nosafepoint;)
929 // jni_GetMethodID makes sure class is linked and initialized
930 // so m should have a valid vtable index.
931 assert(m->valid_vtable_index(), "no valid vtable index");
932 int vtbl_index = m->vtable_index();
933 if (vtbl_index != Method::nonvirtual_vtable_index) {
934 selected_method = h_recv->klass()->method_at_vtable(vtbl_index);
935 } else {
936 // final method
937 selected_method = m;
938 }
939 } else {
940 // interface call
941 int itbl_index = m->itable_index();
942 Klass* k = h_recv->klass();
943 selected_method = InstanceKlass::cast(k)->method_at_itable(holder, itbl_index, CHECK);
944 }
945 }
946
947 methodHandle method(THREAD, selected_method);
948
949 // Create object to hold arguments for the JavaCall, and associate it with
950 // the jni parser
951 ResourceMark rm(THREAD);
952 JavaCallArguments java_args(number_of_parameters);
953
954 // handle arguments
955 assert(!method->is_static(), "method %s should not be static", method->name_and_sig_as_C_string());
956 java_args.push_oop(h_recv); // Push jobject handle
957
958 // Fill out JavaCallArguments object
959 args->push_arguments_on(&java_args);
960 // Initialize result type
961 result->set_type(args->return_type());
962
963 // Invoke the method. Result is returned as oop.
964 JavaCalls::call(result, method, &java_args, CHECK);
965
966 // Convert result
967 if (is_reference_type(result->get_type())) {
968 result->set_jobject(JNIHandles::make_local(THREAD, result->get_oop()));
969 }
970 }
971
972 DT_RETURN_MARK_DECL(AllocObject, jobject
973 , HOTSPOT_JNI_ALLOCOBJECT_RETURN(_ret_ref));
974
975 JNI_ENTRY(jobject, jni_AllocObject(JNIEnv *env, jclass clazz))
976 HOTSPOT_JNI_ALLOCOBJECT_ENTRY(env, clazz);
977
978 jobject ret = nullptr;
979 DT_RETURN_MARK(AllocObject, jobject, (const jobject&)ret);
980
981 instanceOop i = InstanceKlass::allocate_instance(JNIHandles::resolve_non_null(clazz), CHECK_NULL);
982 ret = JNIHandles::make_local(THREAD, i);
983 return ret;
984 JNI_END
985
986 DT_RETURN_MARK_DECL(NewObjectA, jobject
987 , HOTSPOT_JNI_NEWOBJECTA_RETURN(_ret_ref));
988
989 JNI_ENTRY(jobject, jni_NewObjectA(JNIEnv *env, jclass clazz, jmethodID methodID, const jvalue *args))
990 HOTSPOT_JNI_NEWOBJECTA_ENTRY(env, clazz, (uintptr_t) methodID);
991
992 jobject obj = nullptr;
993 DT_RETURN_MARK(NewObjectA, jobject, (const jobject&)obj);
994
995 oop clazzoop = JNIHandles::resolve_non_null(clazz);
996 Klass* k = java_lang_Class::as_Klass(clazzoop);
997 if (k == nullptr) {
998 ResourceMark rm(THREAD);
999 THROW_(vmSymbols::java_lang_InstantiationException(), nullptr);
1000 }
1001
1002 if (!k->is_inline_klass()) {
1003 instanceOop i = InstanceKlass::allocate_instance(clazzoop, CHECK_NULL);
1004 obj = JNIHandles::make_local(THREAD, i);
1005 JavaValue jvalue(T_VOID);
1006 JNI_ArgumentPusherArray ap(methodID, args);
1007 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_NULL);
1008 } else {
1009 JavaValue jvalue(T_PRIMITIVE_OBJECT);
1010 JNI_ArgumentPusherArray ap(methodID, args);
1011 jni_invoke_static(env, &jvalue, nullptr, JNI_STATIC, methodID, &ap, CHECK_NULL);
1012 obj = jvalue.get_jobject();
1013 }
1014 return obj;
1015 JNI_END
1016
1017
1018 DT_RETURN_MARK_DECL(NewObjectV, jobject
1019 , HOTSPOT_JNI_NEWOBJECTV_RETURN(_ret_ref));
1020
1021 JNI_ENTRY(jobject, jni_NewObjectV(JNIEnv *env, jclass clazz, jmethodID methodID, va_list args))
1022 HOTSPOT_JNI_NEWOBJECTV_ENTRY(env, clazz, (uintptr_t) methodID);
1023
1024 jobject obj = nullptr;
1025 DT_RETURN_MARK(NewObjectV, jobject, (const jobject&)obj);
1026
1027 oop clazzoop = JNIHandles::resolve_non_null(clazz);
1028 Klass* k = java_lang_Class::as_Klass(clazzoop);
1029 if (k == nullptr) {
1030 ResourceMark rm(THREAD);
1031 THROW_(vmSymbols::java_lang_InstantiationException(), nullptr);
1032 }
1033
1034 if (!k->is_inline_klass()) {
1035 instanceOop i = InstanceKlass::allocate_instance(clazzoop, CHECK_NULL);
1036 obj = JNIHandles::make_local(THREAD, i);
1037 JavaValue jvalue(T_VOID);
1038 JNI_ArgumentPusherVaArg ap(methodID, args);
1039 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_NULL);
1040 } else {
1041 JavaValue jvalue(T_PRIMITIVE_OBJECT);
1042 JNI_ArgumentPusherVaArg ap(methodID, args);
1043 jni_invoke_static(env, &jvalue, nullptr, JNI_STATIC, methodID, &ap, CHECK_NULL);
1044 obj = jvalue.get_jobject();
1045 }
1046 return obj;
1047 JNI_END
1048
1049
1050 DT_RETURN_MARK_DECL(NewObject, jobject
1051 , HOTSPOT_JNI_NEWOBJECT_RETURN(_ret_ref));
1052
1053 JNI_ENTRY(jobject, jni_NewObject(JNIEnv *env, jclass clazz, jmethodID methodID, ...))
1054 HOTSPOT_JNI_NEWOBJECT_ENTRY(env, clazz, (uintptr_t) methodID);
1055
1056 jobject obj = nullptr;
1057 DT_RETURN_MARK(NewObject, jobject, (const jobject&)obj);
1058
1059 oop clazzoop = JNIHandles::resolve_non_null(clazz);
1060 Klass* k = java_lang_Class::as_Klass(clazzoop);
1061 if (k == nullptr) {
1062 ResourceMark rm(THREAD);
1063 THROW_(vmSymbols::java_lang_InstantiationException(), nullptr);
1064 }
1065
1066 if (!k->is_inline_klass()) {
1067 instanceOop i = InstanceKlass::allocate_instance(clazzoop, CHECK_NULL);
1068 obj = JNIHandles::make_local(THREAD, i);
1069 va_list args;
1070 va_start(args, methodID);
1071 JavaValue jvalue(T_VOID);
1072 JNI_ArgumentPusherVaArg ap(methodID, args);
1073 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_NULL);
1074 va_end(args);
1075 } else {
1076 va_list args;
1077 va_start(args, methodID);
1078 JavaValue jvalue(T_PRIMITIVE_OBJECT);
1079 JNI_ArgumentPusherVaArg ap(methodID, args);
1080 jni_invoke_static(env, &jvalue, nullptr, JNI_STATIC, methodID, &ap, CHECK_NULL);
1081 va_end(args);
1082 obj = jvalue.get_jobject();
1083 }
1084 return obj;
1085 JNI_END
1086
1087
1088 JNI_ENTRY(jclass, jni_GetObjectClass(JNIEnv *env, jobject obj))
1089 HOTSPOT_JNI_GETOBJECTCLASS_ENTRY(env, obj);
1090
1091 Klass* k = JNIHandles::resolve_non_null(obj)->klass();
1092 jclass ret =
1093 (jclass) JNIHandles::make_local(THREAD, k->java_mirror());
1094
1095 HOTSPOT_JNI_GETOBJECTCLASS_RETURN(ret);
1096 return ret;
1097 JNI_END
1098
1099 JNI_ENTRY_NO_PRESERVE(jboolean, jni_IsInstanceOf(JNIEnv *env, jobject obj, jclass clazz))
1100 HOTSPOT_JNI_ISINSTANCEOF_ENTRY(env, obj, clazz);
1101
1102 jboolean ret = JNI_TRUE;
1103 if (obj != nullptr) {
1104 ret = JNI_FALSE;
1105 Klass* k = java_lang_Class::as_Klass(
1106 JNIHandles::resolve_non_null(clazz));
1107 if (k != nullptr) {
1108 ret = JNIHandles::resolve_non_null(obj)->is_a(k) ? JNI_TRUE : JNI_FALSE;
1109 }
1110 }
1111
1112 HOTSPOT_JNI_ISINSTANCEOF_RETURN(ret);
1113 return ret;
1114 JNI_END
1115
1116
1117 static jmethodID get_method_id(JNIEnv *env, jclass clazz, const char *name_str,
1118 const char *sig, bool is_static, TRAPS) {
1119 // %%%% This code should probably just call into a method in the LinkResolver
1120 //
1121 // The class should have been loaded (we have an instance of the class
1122 // passed in) so the method and signature should already be in the symbol
1123 // table. If they're not there, the method doesn't exist.
1124 const char *name_to_probe = (name_str == nullptr)
1125 ? vmSymbols::object_initializer_name()->as_C_string()
1126 : name_str;
1127 TempNewSymbol name = SymbolTable::probe(name_to_probe, (int)strlen(name_to_probe));
1128 TempNewSymbol signature = SymbolTable::probe(sig, (int)strlen(sig));
1129
1130 if (name == nullptr || signature == nullptr) {
1131 THROW_MSG_0(vmSymbols::java_lang_NoSuchMethodError(), name_str);
1132 }
1133
1134 oop mirror = JNIHandles::resolve_non_null(clazz);
1135 Klass* klass = java_lang_Class::as_Klass(mirror);
1136
1137 // Throw a NoSuchMethodError exception if we have an instance of a
1138 // primitive java.lang.Class
1139 if (java_lang_Class::is_primitive(mirror)) {
1140 ResourceMark rm(THREAD);
1141 THROW_MSG_0(vmSymbols::java_lang_NoSuchMethodError(), err_msg("%s%s.%s%s", is_static ? "static " : "", klass->signature_name(), name_str, sig));
1142 }
1143
1144 // Make sure class is linked and initialized before handing id's out to
1145 // Method*s.
1146 klass->initialize(CHECK_NULL);
1147
1148 Method* m;
1149 if (name == vmSymbols::object_initializer_name() ||
1150 name == vmSymbols::class_initializer_name()) {
1151 // Never search superclasses for constructors
1152 if (klass->is_instance_klass()) {
1153 m = InstanceKlass::cast(klass)->find_method(name, signature);
1154 } else {
1155 m = nullptr;
1156 }
1157 } else {
1158 m = klass->lookup_method(name, signature);
1159 if (m == nullptr && klass->is_instance_klass()) {
1160 m = InstanceKlass::cast(klass)->lookup_method_in_ordered_interfaces(name, signature);
1161 }
1162 }
1163 if (m == nullptr || (m->is_static() != is_static)) {
1164 ResourceMark rm(THREAD);
1165 THROW_MSG_0(vmSymbols::java_lang_NoSuchMethodError(), err_msg("%s%s.%s%s", is_static ? "static " : "", klass->signature_name(), name_str, sig));
1166 }
1167 return m->jmethod_id();
1168 }
1169
1170
1171 JNI_ENTRY(jmethodID, jni_GetMethodID(JNIEnv *env, jclass clazz,
1172 const char *name, const char *sig))
1173 HOTSPOT_JNI_GETMETHODID_ENTRY(env, clazz, (char *) name, (char *) sig);
1174 jmethodID ret = get_method_id(env, clazz, name, sig, false, thread);
1175 HOTSPOT_JNI_GETMETHODID_RETURN((uintptr_t) ret);
1176 return ret;
1177 JNI_END
1178
1179
1180 JNI_ENTRY(jmethodID, jni_GetStaticMethodID(JNIEnv *env, jclass clazz,
1181 const char *name, const char *sig))
1182 HOTSPOT_JNI_GETSTATICMETHODID_ENTRY(env, (char *) clazz, (char *) name, (char *)sig);
1183 jmethodID ret = get_method_id(env, clazz, name, sig, true, thread);
1184 HOTSPOT_JNI_GETSTATICMETHODID_RETURN((uintptr_t) ret);
1185 return ret;
1186 JNI_END
1187
1188
1189
1190 //
1191 // Calling Methods
1192 //
1193
1194
1195 #define DEFINE_CALLMETHOD(ResultType, Result, Tag \
1196 , EntryProbe, ReturnProbe) \
1197 \
1198 DT_RETURN_MARK_DECL_FOR(Result, Call##Result##Method, ResultType \
1199 , ReturnProbe); \
1200 \
1201 JNI_ENTRY(ResultType, \
1202 jni_Call##Result##Method(JNIEnv *env, jobject obj, jmethodID methodID, ...)) \
1203 \
1204 EntryProbe; \
1205 ResultType ret = 0;\
1206 DT_RETURN_MARK_FOR(Result, Call##Result##Method, ResultType, \
1207 (const ResultType&)ret);\
1208 \
1209 va_list args; \
1210 va_start(args, methodID); \
1211 JavaValue jvalue(Tag); \
1212 JNI_ArgumentPusherVaArg ap(methodID, args); \
1213 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK_0); \
1214 va_end(args); \
1215 ret = jvalue.get_##ResultType(); \
1216 return ret;\
1217 JNI_END
1218
1219 // the runtime type of subword integral basic types is integer
1220 DEFINE_CALLMETHOD(jboolean, Boolean, T_BOOLEAN
1221 , HOTSPOT_JNI_CALLBOOLEANMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1222 HOTSPOT_JNI_CALLBOOLEANMETHOD_RETURN(_ret_ref))
1223 DEFINE_CALLMETHOD(jbyte, Byte, T_BYTE
1224 , HOTSPOT_JNI_CALLBYTEMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1225 HOTSPOT_JNI_CALLBYTEMETHOD_RETURN(_ret_ref))
1226 DEFINE_CALLMETHOD(jchar, Char, T_CHAR
1227 , HOTSPOT_JNI_CALLCHARMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1228 HOTSPOT_JNI_CALLCHARMETHOD_RETURN(_ret_ref))
1229 DEFINE_CALLMETHOD(jshort, Short, T_SHORT
1230 , HOTSPOT_JNI_CALLSHORTMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1231 HOTSPOT_JNI_CALLSHORTMETHOD_RETURN(_ret_ref))
1232
1233 DEFINE_CALLMETHOD(jobject, Object, T_OBJECT
1234 , HOTSPOT_JNI_CALLOBJECTMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1235 HOTSPOT_JNI_CALLOBJECTMETHOD_RETURN(_ret_ref))
1236 DEFINE_CALLMETHOD(jint, Int, T_INT,
1237 HOTSPOT_JNI_CALLINTMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1238 HOTSPOT_JNI_CALLINTMETHOD_RETURN(_ret_ref))
1239 DEFINE_CALLMETHOD(jlong, Long, T_LONG
1240 , HOTSPOT_JNI_CALLLONGMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1241 HOTSPOT_JNI_CALLLONGMETHOD_RETURN(_ret_ref))
1242 // Float and double probes don't return value because dtrace doesn't currently support it
1243 DEFINE_CALLMETHOD(jfloat, Float, T_FLOAT
1244 , HOTSPOT_JNI_CALLFLOATMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1245 HOTSPOT_JNI_CALLFLOATMETHOD_RETURN())
1246 DEFINE_CALLMETHOD(jdouble, Double, T_DOUBLE
1247 , HOTSPOT_JNI_CALLDOUBLEMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1248 HOTSPOT_JNI_CALLDOUBLEMETHOD_RETURN())
1249
1250 #define DEFINE_CALLMETHODV(ResultType, Result, Tag \
1251 , EntryProbe, ReturnProbe) \
1252 \
1253 DT_RETURN_MARK_DECL_FOR(Result, Call##Result##MethodV, ResultType \
1254 , ReturnProbe); \
1255 \
1256 JNI_ENTRY(ResultType, \
1257 jni_Call##Result##MethodV(JNIEnv *env, jobject obj, jmethodID methodID, va_list args)) \
1258 \
1259 EntryProbe;\
1260 ResultType ret = 0;\
1261 DT_RETURN_MARK_FOR(Result, Call##Result##MethodV, ResultType, \
1262 (const ResultType&)ret);\
1263 \
1264 JavaValue jvalue(Tag); \
1265 JNI_ArgumentPusherVaArg ap(methodID, args); \
1266 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK_0); \
1267 ret = jvalue.get_##ResultType(); \
1268 return ret;\
1269 JNI_END
1270
1271 // the runtime type of subword integral basic types is integer
1272 DEFINE_CALLMETHODV(jboolean, Boolean, T_BOOLEAN
1273 , HOTSPOT_JNI_CALLBOOLEANMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1274 HOTSPOT_JNI_CALLBOOLEANMETHODV_RETURN(_ret_ref))
1275 DEFINE_CALLMETHODV(jbyte, Byte, T_BYTE
1276 , HOTSPOT_JNI_CALLBYTEMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1277 HOTSPOT_JNI_CALLBYTEMETHODV_RETURN(_ret_ref))
1278 DEFINE_CALLMETHODV(jchar, Char, T_CHAR
1279 , HOTSPOT_JNI_CALLCHARMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1280 HOTSPOT_JNI_CALLCHARMETHODV_RETURN(_ret_ref))
1281 DEFINE_CALLMETHODV(jshort, Short, T_SHORT
1282 , HOTSPOT_JNI_CALLSHORTMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1283 HOTSPOT_JNI_CALLSHORTMETHODV_RETURN(_ret_ref))
1284
1285 DEFINE_CALLMETHODV(jobject, Object, T_OBJECT
1286 , HOTSPOT_JNI_CALLOBJECTMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1287 HOTSPOT_JNI_CALLOBJECTMETHODV_RETURN(_ret_ref))
1288 DEFINE_CALLMETHODV(jint, Int, T_INT,
1289 HOTSPOT_JNI_CALLINTMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1290 HOTSPOT_JNI_CALLINTMETHODV_RETURN(_ret_ref))
1291 DEFINE_CALLMETHODV(jlong, Long, T_LONG
1292 , HOTSPOT_JNI_CALLLONGMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1293 HOTSPOT_JNI_CALLLONGMETHODV_RETURN(_ret_ref))
1294 // Float and double probes don't return value because dtrace doesn't currently support it
1295 DEFINE_CALLMETHODV(jfloat, Float, T_FLOAT
1296 , HOTSPOT_JNI_CALLFLOATMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1297 HOTSPOT_JNI_CALLFLOATMETHODV_RETURN())
1298 DEFINE_CALLMETHODV(jdouble, Double, T_DOUBLE
1299 , HOTSPOT_JNI_CALLDOUBLEMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1300 HOTSPOT_JNI_CALLDOUBLEMETHODV_RETURN())
1301
1302 #define DEFINE_CALLMETHODA(ResultType, Result, Tag \
1303 , EntryProbe, ReturnProbe) \
1304 \
1305 DT_RETURN_MARK_DECL_FOR(Result, Call##Result##MethodA, ResultType \
1306 , ReturnProbe); \
1307 \
1308 JNI_ENTRY(ResultType, \
1309 jni_Call##Result##MethodA(JNIEnv *env, jobject obj, jmethodID methodID, const jvalue *args)) \
1310 EntryProbe; \
1311 ResultType ret = 0;\
1312 DT_RETURN_MARK_FOR(Result, Call##Result##MethodA, ResultType, \
1313 (const ResultType&)ret);\
1314 \
1315 JavaValue jvalue(Tag); \
1316 JNI_ArgumentPusherArray ap(methodID, args); \
1317 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK_0); \
1318 ret = jvalue.get_##ResultType(); \
1319 return ret;\
1320 JNI_END
1321
1322 // the runtime type of subword integral basic types is integer
1323 DEFINE_CALLMETHODA(jboolean, Boolean, T_BOOLEAN
1324 , HOTSPOT_JNI_CALLBOOLEANMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1325 HOTSPOT_JNI_CALLBOOLEANMETHODA_RETURN(_ret_ref))
1326 DEFINE_CALLMETHODA(jbyte, Byte, T_BYTE
1327 , HOTSPOT_JNI_CALLBYTEMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1328 HOTSPOT_JNI_CALLBYTEMETHODA_RETURN(_ret_ref))
1329 DEFINE_CALLMETHODA(jchar, Char, T_CHAR
1330 , HOTSPOT_JNI_CALLCHARMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1331 HOTSPOT_JNI_CALLCHARMETHODA_RETURN(_ret_ref))
1332 DEFINE_CALLMETHODA(jshort, Short, T_SHORT
1333 , HOTSPOT_JNI_CALLSHORTMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1334 HOTSPOT_JNI_CALLSHORTMETHODA_RETURN(_ret_ref))
1335
1336 DEFINE_CALLMETHODA(jobject, Object, T_OBJECT
1337 , HOTSPOT_JNI_CALLOBJECTMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1338 HOTSPOT_JNI_CALLOBJECTMETHODA_RETURN(_ret_ref))
1339 DEFINE_CALLMETHODA(jint, Int, T_INT,
1340 HOTSPOT_JNI_CALLINTMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1341 HOTSPOT_JNI_CALLINTMETHODA_RETURN(_ret_ref))
1342 DEFINE_CALLMETHODA(jlong, Long, T_LONG
1343 , HOTSPOT_JNI_CALLLONGMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1344 HOTSPOT_JNI_CALLLONGMETHODA_RETURN(_ret_ref))
1345 // Float and double probes don't return value because dtrace doesn't currently support it
1346 DEFINE_CALLMETHODA(jfloat, Float, T_FLOAT
1347 , HOTSPOT_JNI_CALLFLOATMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1348 HOTSPOT_JNI_CALLFLOATMETHODA_RETURN())
1349 DEFINE_CALLMETHODA(jdouble, Double, T_DOUBLE
1350 , HOTSPOT_JNI_CALLDOUBLEMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1351 HOTSPOT_JNI_CALLDOUBLEMETHODA_RETURN())
1352
1353 DT_VOID_RETURN_MARK_DECL(CallVoidMethod, HOTSPOT_JNI_CALLVOIDMETHOD_RETURN());
1354 DT_VOID_RETURN_MARK_DECL(CallVoidMethodV, HOTSPOT_JNI_CALLVOIDMETHODV_RETURN());
1355 DT_VOID_RETURN_MARK_DECL(CallVoidMethodA, HOTSPOT_JNI_CALLVOIDMETHODA_RETURN());
1356
1357
1358 JNI_ENTRY(void, jni_CallVoidMethod(JNIEnv *env, jobject obj, jmethodID methodID, ...))
1359 HOTSPOT_JNI_CALLVOIDMETHOD_ENTRY(env, obj, (uintptr_t) methodID);
1360 DT_VOID_RETURN_MARK(CallVoidMethod);
1361
1362 va_list args;
1363 va_start(args, methodID);
1364 JavaValue jvalue(T_VOID);
1365 JNI_ArgumentPusherVaArg ap(methodID, args);
1366 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK);
1367 va_end(args);
1368 JNI_END
1369
1370
1371 JNI_ENTRY(void, jni_CallVoidMethodV(JNIEnv *env, jobject obj, jmethodID methodID, va_list args))
1372 HOTSPOT_JNI_CALLVOIDMETHODV_ENTRY(env, obj, (uintptr_t) methodID);
1373 DT_VOID_RETURN_MARK(CallVoidMethodV);
1374
1375 JavaValue jvalue(T_VOID);
1376 JNI_ArgumentPusherVaArg ap(methodID, args);
1377 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK);
1378 JNI_END
1379
1380
1381 JNI_ENTRY(void, jni_CallVoidMethodA(JNIEnv *env, jobject obj, jmethodID methodID, const jvalue *args))
1382 HOTSPOT_JNI_CALLVOIDMETHODA_ENTRY(env, obj, (uintptr_t) methodID);
1383 DT_VOID_RETURN_MARK(CallVoidMethodA);
1384
1385 JavaValue jvalue(T_VOID);
1386 JNI_ArgumentPusherArray ap(methodID, args);
1387 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK);
1388 JNI_END
1389
1390
1391
1392 #define DEFINE_CALLNONVIRTUALMETHOD(ResultType, Result, Tag \
1393 , EntryProbe, ReturnProbe) \
1394 \
1395 DT_RETURN_MARK_DECL_FOR(Result, CallNonvirtual##Result##Method, ResultType \
1396 , ReturnProbe);\
1397 \
1398 JNI_ENTRY(ResultType, \
1399 jni_CallNonvirtual##Result##Method(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, ...)) \
1400 \
1401 EntryProbe;\
1402 ResultType ret;\
1403 DT_RETURN_MARK_FOR(Result, CallNonvirtual##Result##Method, ResultType, \
1404 (const ResultType&)ret);\
1405 \
1406 va_list args; \
1407 va_start(args, methodID); \
1408 JavaValue jvalue(Tag); \
1409 JNI_ArgumentPusherVaArg ap(methodID, args); \
1410 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_0); \
1411 va_end(args); \
1412 ret = jvalue.get_##ResultType(); \
1413 return ret;\
1414 JNI_END
1415
1416 // the runtime type of subword integral basic types is integer
1417 DEFINE_CALLNONVIRTUALMETHOD(jboolean, Boolean, T_BOOLEAN
1418 , HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1419 HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHOD_RETURN(_ret_ref))
1420 DEFINE_CALLNONVIRTUALMETHOD(jbyte, Byte, T_BYTE
1421 , HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1422 HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHOD_RETURN(_ret_ref))
1423 DEFINE_CALLNONVIRTUALMETHOD(jchar, Char, T_CHAR
1424 , HOTSPOT_JNI_CALLNONVIRTUALCHARMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1425 HOTSPOT_JNI_CALLNONVIRTUALCHARMETHOD_RETURN(_ret_ref))
1426 DEFINE_CALLNONVIRTUALMETHOD(jshort, Short, T_SHORT
1427 , HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1428 HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHOD_RETURN(_ret_ref))
1429
1430 DEFINE_CALLNONVIRTUALMETHOD(jobject, Object, T_OBJECT
1431 , HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1432 HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHOD_RETURN(_ret_ref))
1433 DEFINE_CALLNONVIRTUALMETHOD(jint, Int, T_INT
1434 , HOTSPOT_JNI_CALLNONVIRTUALINTMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1435 HOTSPOT_JNI_CALLNONVIRTUALINTMETHOD_RETURN(_ret_ref))
1436 DEFINE_CALLNONVIRTUALMETHOD(jlong, Long, T_LONG
1437 , HOTSPOT_JNI_CALLNONVIRTUALLONGMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1438 // Float and double probes don't return value because dtrace doesn't currently support it
1439 HOTSPOT_JNI_CALLNONVIRTUALLONGMETHOD_RETURN(_ret_ref))
1440 DEFINE_CALLNONVIRTUALMETHOD(jfloat, Float, T_FLOAT
1441 , HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1442 HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHOD_RETURN())
1443 DEFINE_CALLNONVIRTUALMETHOD(jdouble, Double, T_DOUBLE
1444 , HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1445 HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHOD_RETURN())
1446
1447 #define DEFINE_CALLNONVIRTUALMETHODV(ResultType, Result, Tag \
1448 , EntryProbe, ReturnProbe) \
1449 \
1450 DT_RETURN_MARK_DECL_FOR(Result, CallNonvirtual##Result##MethodV, ResultType \
1451 , ReturnProbe);\
1452 \
1453 JNI_ENTRY(ResultType, \
1454 jni_CallNonvirtual##Result##MethodV(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, va_list args)) \
1455 \
1456 EntryProbe;\
1457 ResultType ret;\
1458 DT_RETURN_MARK_FOR(Result, CallNonvirtual##Result##MethodV, ResultType, \
1459 (const ResultType&)ret);\
1460 \
1461 JavaValue jvalue(Tag); \
1462 JNI_ArgumentPusherVaArg ap(methodID, args); \
1463 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_0); \
1464 ret = jvalue.get_##ResultType(); \
1465 return ret;\
1466 JNI_END
1467
1468 // the runtime type of subword integral basic types is integer
1469 DEFINE_CALLNONVIRTUALMETHODV(jboolean, Boolean, T_BOOLEAN
1470 , HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1471 HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHODV_RETURN(_ret_ref))
1472 DEFINE_CALLNONVIRTUALMETHODV(jbyte, Byte, T_BYTE
1473 , HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1474 HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHODV_RETURN(_ret_ref))
1475 DEFINE_CALLNONVIRTUALMETHODV(jchar, Char, T_CHAR
1476 , HOTSPOT_JNI_CALLNONVIRTUALCHARMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1477 HOTSPOT_JNI_CALLNONVIRTUALCHARMETHODV_RETURN(_ret_ref))
1478 DEFINE_CALLNONVIRTUALMETHODV(jshort, Short, T_SHORT
1479 , HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1480 HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHODV_RETURN(_ret_ref))
1481
1482 DEFINE_CALLNONVIRTUALMETHODV(jobject, Object, T_OBJECT
1483 , HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1484 HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHODV_RETURN(_ret_ref))
1485 DEFINE_CALLNONVIRTUALMETHODV(jint, Int, T_INT
1486 , HOTSPOT_JNI_CALLNONVIRTUALINTMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1487 HOTSPOT_JNI_CALLNONVIRTUALINTMETHODV_RETURN(_ret_ref))
1488 DEFINE_CALLNONVIRTUALMETHODV(jlong, Long, T_LONG
1489 , HOTSPOT_JNI_CALLNONVIRTUALLONGMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1490 // Float and double probes don't return value because dtrace doesn't currently support it
1491 HOTSPOT_JNI_CALLNONVIRTUALLONGMETHODV_RETURN(_ret_ref))
1492 DEFINE_CALLNONVIRTUALMETHODV(jfloat, Float, T_FLOAT
1493 , HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1494 HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHODV_RETURN())
1495 DEFINE_CALLNONVIRTUALMETHODV(jdouble, Double, T_DOUBLE
1496 , HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1497 HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHODV_RETURN())
1498
1499 #define DEFINE_CALLNONVIRTUALMETHODA(ResultType, Result, Tag \
1500 , EntryProbe, ReturnProbe) \
1501 \
1502 DT_RETURN_MARK_DECL_FOR(Result, CallNonvirtual##Result##MethodA, ResultType \
1503 , ReturnProbe);\
1504 \
1505 JNI_ENTRY(ResultType, \
1506 jni_CallNonvirtual##Result##MethodA(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, const jvalue *args)) \
1507 \
1508 EntryProbe;\
1509 ResultType ret;\
1510 DT_RETURN_MARK_FOR(Result, CallNonvirtual##Result##MethodA, ResultType, \
1511 (const ResultType&)ret);\
1512 \
1513 JavaValue jvalue(Tag); \
1514 JNI_ArgumentPusherArray ap(methodID, args); \
1515 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_0); \
1516 ret = jvalue.get_##ResultType(); \
1517 return ret;\
1518 JNI_END
1519
1520 // the runtime type of subword integral basic types is integer
1521 DEFINE_CALLNONVIRTUALMETHODA(jboolean, Boolean, T_BOOLEAN
1522 , HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1523 HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHODA_RETURN(_ret_ref))
1524 DEFINE_CALLNONVIRTUALMETHODA(jbyte, Byte, T_BYTE
1525 , HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1526 HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHODA_RETURN(_ret_ref))
1527 DEFINE_CALLNONVIRTUALMETHODA(jchar, Char, T_CHAR
1528 , HOTSPOT_JNI_CALLNONVIRTUALCHARMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1529 HOTSPOT_JNI_CALLNONVIRTUALCHARMETHODA_RETURN(_ret_ref))
1530 DEFINE_CALLNONVIRTUALMETHODA(jshort, Short, T_SHORT
1531 , HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1532 HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHODA_RETURN(_ret_ref))
1533
1534 DEFINE_CALLNONVIRTUALMETHODA(jobject, Object, T_OBJECT
1535 , HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1536 HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHODA_RETURN(_ret_ref))
1537 DEFINE_CALLNONVIRTUALMETHODA(jint, Int, T_INT
1538 , HOTSPOT_JNI_CALLNONVIRTUALINTMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1539 HOTSPOT_JNI_CALLNONVIRTUALINTMETHODA_RETURN(_ret_ref))
1540 DEFINE_CALLNONVIRTUALMETHODA(jlong, Long, T_LONG
1541 , HOTSPOT_JNI_CALLNONVIRTUALLONGMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1542 // Float and double probes don't return value because dtrace doesn't currently support it
1543 HOTSPOT_JNI_CALLNONVIRTUALLONGMETHODA_RETURN(_ret_ref))
1544 DEFINE_CALLNONVIRTUALMETHODA(jfloat, Float, T_FLOAT
1545 , HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1546 HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHODA_RETURN())
1547 DEFINE_CALLNONVIRTUALMETHODA(jdouble, Double, T_DOUBLE
1548 , HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1549 HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHODA_RETURN())
1550
1551 DT_VOID_RETURN_MARK_DECL(CallNonvirtualVoidMethod
1552 , HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHOD_RETURN());
1553 DT_VOID_RETURN_MARK_DECL(CallNonvirtualVoidMethodV
1554 , HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHODV_RETURN());
1555 DT_VOID_RETURN_MARK_DECL(CallNonvirtualVoidMethodA
1556 , HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHODA_RETURN());
1557
1558 JNI_ENTRY(void, jni_CallNonvirtualVoidMethod(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, ...))
1559 HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHOD_ENTRY(env, obj, cls, (uintptr_t) methodID);
1560 DT_VOID_RETURN_MARK(CallNonvirtualVoidMethod);
1561
1562 va_list args;
1563 va_start(args, methodID);
1564 JavaValue jvalue(T_VOID);
1565 JNI_ArgumentPusherVaArg ap(methodID, args);
1566 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK);
1567 va_end(args);
1568 JNI_END
1569
1570
1571 JNI_ENTRY(void, jni_CallNonvirtualVoidMethodV(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, va_list args))
1572 HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHODV_ENTRY(
1573 env, obj, cls, (uintptr_t) methodID);
1574 DT_VOID_RETURN_MARK(CallNonvirtualVoidMethodV);
1575
1576 JavaValue jvalue(T_VOID);
1577 JNI_ArgumentPusherVaArg ap(methodID, args);
1578 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK);
1579 JNI_END
1580
1581
1582 JNI_ENTRY(void, jni_CallNonvirtualVoidMethodA(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, const jvalue *args))
1583 HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHODA_ENTRY(
1584 env, obj, cls, (uintptr_t) methodID);
1585 DT_VOID_RETURN_MARK(CallNonvirtualVoidMethodA);
1586 JavaValue jvalue(T_VOID);
1587 JNI_ArgumentPusherArray ap(methodID, args);
1588 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK);
1589 JNI_END
1590
1591
1592
1593 #define DEFINE_CALLSTATICMETHOD(ResultType, Result, Tag \
1594 , EntryProbe, ResultProbe) \
1595 \
1596 DT_RETURN_MARK_DECL_FOR(Result, CallStatic##Result##Method, ResultType \
1597 , ResultProbe); \
1598 \
1599 JNI_ENTRY(ResultType, \
1600 jni_CallStatic##Result##Method(JNIEnv *env, jclass cls, jmethodID methodID, ...)) \
1601 \
1602 EntryProbe; \
1603 ResultType ret = 0;\
1604 DT_RETURN_MARK_FOR(Result, CallStatic##Result##Method, ResultType, \
1605 (const ResultType&)ret);\
1606 \
1607 va_list args; \
1608 va_start(args, methodID); \
1609 JavaValue jvalue(Tag); \
1610 JNI_ArgumentPusherVaArg ap(methodID, args); \
1611 jni_invoke_static(env, &jvalue, nullptr, JNI_STATIC, methodID, &ap, CHECK_0); \
1612 va_end(args); \
1613 ret = jvalue.get_##ResultType(); \
1614 return ret;\
1615 JNI_END
1616
1617 // the runtime type of subword integral basic types is integer
1618 DEFINE_CALLSTATICMETHOD(jboolean, Boolean, T_BOOLEAN
1619 , HOTSPOT_JNI_CALLSTATICBOOLEANMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1620 HOTSPOT_JNI_CALLSTATICBOOLEANMETHOD_RETURN(_ret_ref));
1621 DEFINE_CALLSTATICMETHOD(jbyte, Byte, T_BYTE
1622 , HOTSPOT_JNI_CALLSTATICBYTEMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1623 HOTSPOT_JNI_CALLSTATICBYTEMETHOD_RETURN(_ret_ref));
1624 DEFINE_CALLSTATICMETHOD(jchar, Char, T_CHAR
1625 , HOTSPOT_JNI_CALLSTATICCHARMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1626 HOTSPOT_JNI_CALLSTATICCHARMETHOD_RETURN(_ret_ref));
1627 DEFINE_CALLSTATICMETHOD(jshort, Short, T_SHORT
1628 , HOTSPOT_JNI_CALLSTATICSHORTMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1629 HOTSPOT_JNI_CALLSTATICSHORTMETHOD_RETURN(_ret_ref));
1630
1631 DEFINE_CALLSTATICMETHOD(jobject, Object, T_OBJECT
1632 , HOTSPOT_JNI_CALLSTATICOBJECTMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1633 HOTSPOT_JNI_CALLSTATICOBJECTMETHOD_RETURN(_ret_ref));
1634 DEFINE_CALLSTATICMETHOD(jint, Int, T_INT
1635 , HOTSPOT_JNI_CALLSTATICINTMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1636 HOTSPOT_JNI_CALLSTATICINTMETHOD_RETURN(_ret_ref));
1637 DEFINE_CALLSTATICMETHOD(jlong, Long, T_LONG
1638 , HOTSPOT_JNI_CALLSTATICLONGMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1639 HOTSPOT_JNI_CALLSTATICLONGMETHOD_RETURN(_ret_ref));
1640 // Float and double probes don't return value because dtrace doesn't currently support it
1641 DEFINE_CALLSTATICMETHOD(jfloat, Float, T_FLOAT
1642 , HOTSPOT_JNI_CALLSTATICFLOATMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1643 HOTSPOT_JNI_CALLSTATICFLOATMETHOD_RETURN());
1644 DEFINE_CALLSTATICMETHOD(jdouble, Double, T_DOUBLE
1645 , HOTSPOT_JNI_CALLSTATICDOUBLEMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1646 HOTSPOT_JNI_CALLSTATICDOUBLEMETHOD_RETURN());
1647
1648 #define DEFINE_CALLSTATICMETHODV(ResultType, Result, Tag \
1649 , EntryProbe, ResultProbe) \
1650 \
1651 DT_RETURN_MARK_DECL_FOR(Result, CallStatic##Result##MethodV, ResultType \
1652 , ResultProbe); \
1653 \
1654 JNI_ENTRY(ResultType, \
1655 jni_CallStatic##Result##MethodV(JNIEnv *env, jclass cls, jmethodID methodID, va_list args)) \
1656 \
1657 EntryProbe; \
1658 ResultType ret = 0;\
1659 DT_RETURN_MARK_FOR(Result, CallStatic##Result##MethodV, ResultType, \
1660 (const ResultType&)ret);\
1661 \
1662 JavaValue jvalue(Tag); \
1663 JNI_ArgumentPusherVaArg ap(methodID, args); \
1664 /* Make sure class is initialized before trying to invoke its method */ \
1665 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); \
1666 k->initialize(CHECK_0); \
1667 jni_invoke_static(env, &jvalue, nullptr, JNI_STATIC, methodID, &ap, CHECK_0); \
1668 va_end(args); \
1669 ret = jvalue.get_##ResultType(); \
1670 return ret;\
1671 JNI_END
1672
1673 // the runtime type of subword integral basic types is integer
1674 DEFINE_CALLSTATICMETHODV(jboolean, Boolean, T_BOOLEAN
1675 , HOTSPOT_JNI_CALLSTATICBOOLEANMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1676 HOTSPOT_JNI_CALLSTATICBOOLEANMETHODV_RETURN(_ret_ref));
1677 DEFINE_CALLSTATICMETHODV(jbyte, Byte, T_BYTE
1678 , HOTSPOT_JNI_CALLSTATICBYTEMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1679 HOTSPOT_JNI_CALLSTATICBYTEMETHODV_RETURN(_ret_ref));
1680 DEFINE_CALLSTATICMETHODV(jchar, Char, T_CHAR
1681 , HOTSPOT_JNI_CALLSTATICCHARMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1682 HOTSPOT_JNI_CALLSTATICCHARMETHODV_RETURN(_ret_ref));
1683 DEFINE_CALLSTATICMETHODV(jshort, Short, T_SHORT
1684 , HOTSPOT_JNI_CALLSTATICSHORTMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1685 HOTSPOT_JNI_CALLSTATICSHORTMETHODV_RETURN(_ret_ref));
1686
1687 DEFINE_CALLSTATICMETHODV(jobject, Object, T_OBJECT
1688 , HOTSPOT_JNI_CALLSTATICOBJECTMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1689 HOTSPOT_JNI_CALLSTATICOBJECTMETHODV_RETURN(_ret_ref));
1690 DEFINE_CALLSTATICMETHODV(jint, Int, T_INT
1691 , HOTSPOT_JNI_CALLSTATICINTMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1692 HOTSPOT_JNI_CALLSTATICINTMETHODV_RETURN(_ret_ref));
1693 DEFINE_CALLSTATICMETHODV(jlong, Long, T_LONG
1694 , HOTSPOT_JNI_CALLSTATICLONGMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1695 HOTSPOT_JNI_CALLSTATICLONGMETHODV_RETURN(_ret_ref));
1696 // Float and double probes don't return value because dtrace doesn't currently support it
1697 DEFINE_CALLSTATICMETHODV(jfloat, Float, T_FLOAT
1698 , HOTSPOT_JNI_CALLSTATICFLOATMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1699 HOTSPOT_JNI_CALLSTATICFLOATMETHODV_RETURN());
1700 DEFINE_CALLSTATICMETHODV(jdouble, Double, T_DOUBLE
1701 , HOTSPOT_JNI_CALLSTATICDOUBLEMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1702 HOTSPOT_JNI_CALLSTATICDOUBLEMETHODV_RETURN());
1703
1704 #define DEFINE_CALLSTATICMETHODA(ResultType, Result, Tag \
1705 , EntryProbe, ResultProbe) \
1706 \
1707 DT_RETURN_MARK_DECL_FOR(Result, CallStatic##Result##MethodA, ResultType \
1708 , ResultProbe); \
1709 \
1710 JNI_ENTRY(ResultType, \
1711 jni_CallStatic##Result##MethodA(JNIEnv *env, jclass cls, jmethodID methodID, const jvalue *args)) \
1712 \
1713 EntryProbe; \
1714 ResultType ret = 0;\
1715 DT_RETURN_MARK_FOR(Result, CallStatic##Result##MethodA, ResultType, \
1716 (const ResultType&)ret);\
1717 \
1718 JavaValue jvalue(Tag); \
1719 JNI_ArgumentPusherArray ap(methodID, args); \
1720 jni_invoke_static(env, &jvalue, nullptr, JNI_STATIC, methodID, &ap, CHECK_0); \
1721 ret = jvalue.get_##ResultType(); \
1722 return ret;\
1723 JNI_END
1724
1725 // the runtime type of subword integral basic types is integer
1726 DEFINE_CALLSTATICMETHODA(jboolean, Boolean, T_BOOLEAN
1727 , HOTSPOT_JNI_CALLSTATICBOOLEANMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1728 HOTSPOT_JNI_CALLSTATICBOOLEANMETHODA_RETURN(_ret_ref));
1729 DEFINE_CALLSTATICMETHODA(jbyte, Byte, T_BYTE
1730 , HOTSPOT_JNI_CALLSTATICBYTEMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1731 HOTSPOT_JNI_CALLSTATICBYTEMETHODA_RETURN(_ret_ref));
1732 DEFINE_CALLSTATICMETHODA(jchar, Char, T_CHAR
1733 , HOTSPOT_JNI_CALLSTATICCHARMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1734 HOTSPOT_JNI_CALLSTATICCHARMETHODA_RETURN(_ret_ref));
1735 DEFINE_CALLSTATICMETHODA(jshort, Short, T_SHORT
1736 , HOTSPOT_JNI_CALLSTATICSHORTMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1737 HOTSPOT_JNI_CALLSTATICSHORTMETHODA_RETURN(_ret_ref));
1738
1739 DEFINE_CALLSTATICMETHODA(jobject, Object, T_OBJECT
1740 , HOTSPOT_JNI_CALLSTATICOBJECTMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1741 HOTSPOT_JNI_CALLSTATICOBJECTMETHODA_RETURN(_ret_ref));
1742 DEFINE_CALLSTATICMETHODA(jint, Int, T_INT
1743 , HOTSPOT_JNI_CALLSTATICINTMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1744 HOTSPOT_JNI_CALLSTATICINTMETHODA_RETURN(_ret_ref));
1745 DEFINE_CALLSTATICMETHODA(jlong, Long, T_LONG
1746 , HOTSPOT_JNI_CALLSTATICLONGMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1747 HOTSPOT_JNI_CALLSTATICLONGMETHODA_RETURN(_ret_ref));
1748 // Float and double probes don't return value because dtrace doesn't currently support it
1749 DEFINE_CALLSTATICMETHODA(jfloat, Float, T_FLOAT
1750 , HOTSPOT_JNI_CALLSTATICFLOATMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1751 HOTSPOT_JNI_CALLSTATICFLOATMETHODA_RETURN());
1752 DEFINE_CALLSTATICMETHODA(jdouble, Double, T_DOUBLE
1753 , HOTSPOT_JNI_CALLSTATICDOUBLEMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1754 HOTSPOT_JNI_CALLSTATICDOUBLEMETHODA_RETURN());
1755
1756 DT_VOID_RETURN_MARK_DECL(CallStaticVoidMethod
1757 , HOTSPOT_JNI_CALLSTATICVOIDMETHOD_RETURN());
1758 DT_VOID_RETURN_MARK_DECL(CallStaticVoidMethodV
1759 , HOTSPOT_JNI_CALLSTATICVOIDMETHODV_RETURN());
1760 DT_VOID_RETURN_MARK_DECL(CallStaticVoidMethodA
1761 , HOTSPOT_JNI_CALLSTATICVOIDMETHODA_RETURN());
1762
1763 JNI_ENTRY(void, jni_CallStaticVoidMethod(JNIEnv *env, jclass cls, jmethodID methodID, ...))
1764 HOTSPOT_JNI_CALLSTATICVOIDMETHOD_ENTRY(env, cls, (uintptr_t) methodID);
1765 DT_VOID_RETURN_MARK(CallStaticVoidMethod);
1766
1767 va_list args;
1768 va_start(args, methodID);
1769 JavaValue jvalue(T_VOID);
1770 JNI_ArgumentPusherVaArg ap(methodID, args);
1771 jni_invoke_static(env, &jvalue, nullptr, JNI_STATIC, methodID, &ap, CHECK);
1772 va_end(args);
1773 JNI_END
1774
1775
1776 JNI_ENTRY(void, jni_CallStaticVoidMethodV(JNIEnv *env, jclass cls, jmethodID methodID, va_list args))
1777 HOTSPOT_JNI_CALLSTATICVOIDMETHODV_ENTRY(env, cls, (uintptr_t) methodID);
1778 DT_VOID_RETURN_MARK(CallStaticVoidMethodV);
1779
1780 JavaValue jvalue(T_VOID);
1781 JNI_ArgumentPusherVaArg ap(methodID, args);
1782 jni_invoke_static(env, &jvalue, nullptr, JNI_STATIC, methodID, &ap, CHECK);
1783 JNI_END
1784
1785
1786 JNI_ENTRY(void, jni_CallStaticVoidMethodA(JNIEnv *env, jclass cls, jmethodID methodID, const jvalue *args))
1787 HOTSPOT_JNI_CALLSTATICVOIDMETHODA_ENTRY(env, cls, (uintptr_t) methodID);
1788 DT_VOID_RETURN_MARK(CallStaticVoidMethodA);
1789
1790 JavaValue jvalue(T_VOID);
1791 JNI_ArgumentPusherArray ap(methodID, args);
1792 jni_invoke_static(env, &jvalue, nullptr, JNI_STATIC, methodID, &ap, CHECK);
1793 JNI_END
1794
1795
1796 //
1797 // Accessing Fields
1798 //
1799
1800
1801 DT_RETURN_MARK_DECL(GetFieldID, jfieldID
1802 , HOTSPOT_JNI_GETFIELDID_RETURN((uintptr_t)_ret_ref));
1803
1804 JNI_ENTRY(jfieldID, jni_GetFieldID(JNIEnv *env, jclass clazz,
1805 const char *name, const char *sig))
1806 HOTSPOT_JNI_GETFIELDID_ENTRY(env, clazz, (char *) name, (char *) sig);
1807 jfieldID ret = 0;
1808 DT_RETURN_MARK(GetFieldID, jfieldID, (const jfieldID&)ret);
1809
1810 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz));
1811
1812 // The class should have been loaded (we have an instance of the class
1813 // passed in) so the field and signature should already be in the symbol
1814 // table. If they're not there, the field doesn't exist.
1815 TempNewSymbol fieldname = SymbolTable::probe(name, (int)strlen(name));
1816 TempNewSymbol signame = SymbolTable::probe(sig, (int)strlen(sig));
1817 if (fieldname == nullptr || signame == nullptr) {
1818 ResourceMark rm;
1819 THROW_MSG_0(vmSymbols::java_lang_NoSuchFieldError(), err_msg("%s.%s %s", k->external_name(), name, sig));
1820 }
1821
1822 // Make sure class is initialized before handing id's out to fields
1823 k->initialize(CHECK_NULL);
1824
1825 fieldDescriptor fd;
1826 if (!k->is_instance_klass() ||
1827 !InstanceKlass::cast(k)->find_field(fieldname, signame, false, &fd)) {
1828 ResourceMark rm;
1829 THROW_MSG_0(vmSymbols::java_lang_NoSuchFieldError(), err_msg("%s.%s %s", k->external_name(), name, sig));
1830 }
1831
1832 // A jfieldID for a non-static field is simply the offset of the field within the instanceOop
1833 // It may also have hash bits for k, if VerifyJNIFields is turned on.
1834 ret = jfieldIDWorkaround::to_instance_jfieldID(k, fd.offset(), fd.is_flat());
1835 return ret;
1836 JNI_END
1837
1838
1839 JNI_ENTRY(jobject, jni_GetObjectField(JNIEnv *env, jobject obj, jfieldID fieldID))
1840 HOTSPOT_JNI_GETOBJECTFIELD_ENTRY(env, obj, (uintptr_t) fieldID);
1841 oop o = JNIHandles::resolve_non_null(obj);
1842 Klass* k = o->klass();
1843 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID);
1844 oop res = nullptr;
1845 // Keep JVMTI addition small and only check enabled flag here.
1846 // jni_GetField_probe() assumes that is okay to create handles.
1847 if (JvmtiExport::should_post_field_access()) {
1848 o = JvmtiExport::jni_GetField_probe(thread, obj, o, k, fieldID, false);
1849 }
1850 if (!jfieldIDWorkaround::is_flat_jfieldID(fieldID)) {
1851 res = HeapAccess<ON_UNKNOWN_OOP_REF>::oop_load_at(o, offset);
1852 } else {
1853 assert(k->is_instance_klass(), "Only instance can have flat fields");
1854 InstanceKlass* ik = InstanceKlass::cast(k);
1855 fieldDescriptor fd;
1856 ik->find_field_from_offset(offset, false, &fd); // performance bottleneck
1857 InstanceKlass* holder = fd.field_holder();
1858 InlineKlass* field_vklass = InlineKlass::cast(holder->get_inline_type_field_klass(fd.index()));
1859 res = field_vklass->read_flat_field(o, ik->field_offset(fd.index()), CHECK_NULL);
1860 }
1861 jobject ret = JNIHandles::make_local(THREAD, res);
1862 HOTSPOT_JNI_GETOBJECTFIELD_RETURN(ret);
1863 return ret;
1864 JNI_END
1865
1866
1867
1868 #define DEFINE_GETFIELD(Return,Fieldname,Result \
1869 , EntryProbe, ReturnProbe) \
1870 \
1871 DT_RETURN_MARK_DECL_FOR(Result, Get##Result##Field, Return \
1872 , ReturnProbe); \
1873 \
1874 JNI_ENTRY_NO_PRESERVE(Return, jni_Get##Result##Field(JNIEnv *env, jobject obj, jfieldID fieldID)) \
1875 \
1876 EntryProbe; \
1877 Return ret = 0;\
1878 DT_RETURN_MARK_FOR(Result, Get##Result##Field, Return, (const Return&)ret);\
1879 \
1880 oop o = JNIHandles::resolve_non_null(obj); \
1881 Klass* k = o->klass(); \
1882 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID); \
1883 /* Keep JVMTI addition small and only check enabled flag here. */ \
1884 if (JvmtiExport::should_post_field_access()) { \
1885 o = JvmtiExport::jni_GetField_probe(thread, obj, o, k, fieldID, false); \
1886 } \
1887 ret = o->Fieldname##_field(offset); \
1888 return ret; \
1889 JNI_END
1890
1891 DEFINE_GETFIELD(jboolean, bool, Boolean
1892 , HOTSPOT_JNI_GETBOOLEANFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
1893 HOTSPOT_JNI_GETBOOLEANFIELD_RETURN(_ret_ref))
1894 DEFINE_GETFIELD(jbyte, byte, Byte
1895 , HOTSPOT_JNI_GETBYTEFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
1896 HOTSPOT_JNI_GETBYTEFIELD_RETURN(_ret_ref))
1897 DEFINE_GETFIELD(jchar, char, Char
1898 , HOTSPOT_JNI_GETCHARFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
1899 HOTSPOT_JNI_GETCHARFIELD_RETURN(_ret_ref))
1900 DEFINE_GETFIELD(jshort, short, Short
1901 , HOTSPOT_JNI_GETSHORTFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
1902 HOTSPOT_JNI_GETSHORTFIELD_RETURN(_ret_ref))
1903 DEFINE_GETFIELD(jint, int, Int
1904 , HOTSPOT_JNI_GETINTFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
1905 HOTSPOT_JNI_GETINTFIELD_RETURN(_ret_ref))
1906 DEFINE_GETFIELD(jlong, long, Long
1907 , HOTSPOT_JNI_GETLONGFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
1908 HOTSPOT_JNI_GETLONGFIELD_RETURN(_ret_ref))
1909 // Float and double probes don't return value because dtrace doesn't currently support it
1910 DEFINE_GETFIELD(jfloat, float, Float
1911 , HOTSPOT_JNI_GETFLOATFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
1912 HOTSPOT_JNI_GETFLOATFIELD_RETURN())
1913 DEFINE_GETFIELD(jdouble, double, Double
1914 , HOTSPOT_JNI_GETDOUBLEFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
1915 HOTSPOT_JNI_GETDOUBLEFIELD_RETURN())
1916
1917 address jni_GetBooleanField_addr() {
1918 return (address)jni_GetBooleanField;
1919 }
1920 address jni_GetByteField_addr() {
1921 return (address)jni_GetByteField;
1922 }
1923 address jni_GetCharField_addr() {
1924 return (address)jni_GetCharField;
1925 }
1926 address jni_GetShortField_addr() {
1927 return (address)jni_GetShortField;
1928 }
1929 address jni_GetIntField_addr() {
1930 return (address)jni_GetIntField;
1931 }
1932 address jni_GetLongField_addr() {
1933 return (address)jni_GetLongField;
1934 }
1935 address jni_GetFloatField_addr() {
1936 return (address)jni_GetFloatField;
1937 }
1938 address jni_GetDoubleField_addr() {
1939 return (address)jni_GetDoubleField;
1940 }
1941
1942 JNI_ENTRY_NO_PRESERVE(void, jni_SetObjectField(JNIEnv *env, jobject obj, jfieldID fieldID, jobject value))
1943 HOTSPOT_JNI_SETOBJECTFIELD_ENTRY(env, obj, (uintptr_t) fieldID, value);
1944 oop o = JNIHandles::resolve_non_null(obj);
1945 Klass* k = o->klass();
1946 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID);
1947 // Keep JVMTI addition small and only check enabled flag here.
1948 if (JvmtiExport::should_post_field_modification()) {
1949 jvalue field_value;
1950 field_value.l = value;
1951 o = JvmtiExport::jni_SetField_probe(thread, obj, o, k, fieldID, false, JVM_SIGNATURE_CLASS, (jvalue *)&field_value);
1952 }
1953 if (!jfieldIDWorkaround::is_flat_jfieldID(fieldID)) {
1954 HeapAccess<ON_UNKNOWN_OOP_REF>::oop_store_at(o, offset, JNIHandles::resolve(value));
1955 } else {
1956 assert(k->is_instance_klass(), "Only instances can have flat fields");
1957 InstanceKlass* ik = InstanceKlass::cast(k);
1958 fieldDescriptor fd;
1959 ik->find_field_from_offset(offset, false, &fd);
1960 InstanceKlass* holder = fd.field_holder();
1961 InlineKlass* vklass = InlineKlass::cast(holder->get_inline_type_field_klass(fd.index()));
1962 oop v = JNIHandles::resolve_non_null(value);
1963 vklass->write_flat_field(o, offset, v, CHECK);
1964 }
1965 HOTSPOT_JNI_SETOBJECTFIELD_RETURN();
1966 JNI_END
1967
1968
1969 #define DEFINE_SETFIELD(Argument,Fieldname,Result,SigType,unionType \
1970 , EntryProbe, ReturnProbe) \
1971 \
1972 JNI_ENTRY_NO_PRESERVE(void, jni_Set##Result##Field(JNIEnv *env, jobject obj, jfieldID fieldID, Argument value)) \
1973 \
1974 EntryProbe; \
1975 \
1976 oop o = JNIHandles::resolve_non_null(obj); \
1977 Klass* k = o->klass(); \
1978 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID); \
1979 /* Keep JVMTI addition small and only check enabled flag here. */ \
1980 if (JvmtiExport::should_post_field_modification()) { \
1981 jvalue field_value; \
1982 field_value.unionType = value; \
1983 o = JvmtiExport::jni_SetField_probe(thread, obj, o, k, fieldID, false, SigType, (jvalue *)&field_value); \
1984 } \
1985 if (SigType == JVM_SIGNATURE_BOOLEAN) { value = ((jboolean)value) & 1; } \
1986 o->Fieldname##_field_put(offset, value); \
1987 ReturnProbe; \
1988 JNI_END
1989
1990 DEFINE_SETFIELD(jboolean, bool, Boolean, JVM_SIGNATURE_BOOLEAN, z
1991 , HOTSPOT_JNI_SETBOOLEANFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value),
1992 HOTSPOT_JNI_SETBOOLEANFIELD_RETURN())
1993 DEFINE_SETFIELD(jbyte, byte, Byte, JVM_SIGNATURE_BYTE, b
1994 , HOTSPOT_JNI_SETBYTEFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value),
1995 HOTSPOT_JNI_SETBYTEFIELD_RETURN())
1996 DEFINE_SETFIELD(jchar, char, Char, JVM_SIGNATURE_CHAR, c
1997 , HOTSPOT_JNI_SETCHARFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value),
1998 HOTSPOT_JNI_SETCHARFIELD_RETURN())
1999 DEFINE_SETFIELD(jshort, short, Short, JVM_SIGNATURE_SHORT, s
2000 , HOTSPOT_JNI_SETSHORTFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value),
2001 HOTSPOT_JNI_SETSHORTFIELD_RETURN())
2002 DEFINE_SETFIELD(jint, int, Int, JVM_SIGNATURE_INT, i
2003 , HOTSPOT_JNI_SETINTFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value),
2004 HOTSPOT_JNI_SETINTFIELD_RETURN())
2005 DEFINE_SETFIELD(jlong, long, Long, JVM_SIGNATURE_LONG, j
2006 , HOTSPOT_JNI_SETLONGFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value),
2007 HOTSPOT_JNI_SETLONGFIELD_RETURN())
2008 // Float and double probes don't return value because dtrace doesn't currently support it
2009 DEFINE_SETFIELD(jfloat, float, Float, JVM_SIGNATURE_FLOAT, f
2010 , HOTSPOT_JNI_SETFLOATFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2011 HOTSPOT_JNI_SETFLOATFIELD_RETURN())
2012 DEFINE_SETFIELD(jdouble, double, Double, JVM_SIGNATURE_DOUBLE, d
2013 , HOTSPOT_JNI_SETDOUBLEFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2014 HOTSPOT_JNI_SETDOUBLEFIELD_RETURN())
2015
2016 DT_RETURN_MARK_DECL(ToReflectedField, jobject
2017 , HOTSPOT_JNI_TOREFLECTEDFIELD_RETURN(_ret_ref));
2018
2019 JNI_ENTRY(jobject, jni_ToReflectedField(JNIEnv *env, jclass cls, jfieldID fieldID, jboolean isStatic))
2020 HOTSPOT_JNI_TOREFLECTEDFIELD_ENTRY(env, cls, (uintptr_t) fieldID, isStatic);
2021 jobject ret = nullptr;
2022 DT_RETURN_MARK(ToReflectedField, jobject, (const jobject&)ret);
2023
2024 fieldDescriptor fd;
2025 bool found = false;
2026 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2027
2028 assert(jfieldIDWorkaround::is_static_jfieldID(fieldID) == (isStatic != 0), "invalid fieldID");
2029
2030 if (isStatic) {
2031 // Static field. The fieldID a JNIid specifying the field holder and the offset within the Klass*.
2032 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID);
2033 assert(id->is_static_field_id(), "invalid static field id");
2034 found = id->find_local_field(&fd);
2035 } else {
2036 // Non-static field. The fieldID is really the offset of the field within the instanceOop.
2037 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID);
2038 found = InstanceKlass::cast(k)->find_field_from_offset(offset, false, &fd);
2039 }
2040 assert(found, "bad fieldID passed into jni_ToReflectedField");
2041 oop reflected = Reflection::new_field(&fd, CHECK_NULL);
2042 ret = JNIHandles::make_local(THREAD, reflected);
2043 return ret;
2044 JNI_END
2045
2046
2047 //
2048 // Accessing Static Fields
2049 //
2050 DT_RETURN_MARK_DECL(GetStaticFieldID, jfieldID
2051 , HOTSPOT_JNI_GETSTATICFIELDID_RETURN((uintptr_t)_ret_ref));
2052
2053 JNI_ENTRY(jfieldID, jni_GetStaticFieldID(JNIEnv *env, jclass clazz,
2054 const char *name, const char *sig))
2055 HOTSPOT_JNI_GETSTATICFIELDID_ENTRY(env, clazz, (char *) name, (char *) sig);
2056 jfieldID ret = nullptr;
2057 DT_RETURN_MARK(GetStaticFieldID, jfieldID, (const jfieldID&)ret);
2058
2059 // The class should have been loaded (we have an instance of the class
2060 // passed in) so the field and signature should already be in the symbol
2061 // table. If they're not there, the field doesn't exist.
2062 TempNewSymbol fieldname = SymbolTable::probe(name, (int)strlen(name));
2063 TempNewSymbol signame = SymbolTable::probe(sig, (int)strlen(sig));
2064 if (fieldname == nullptr || signame == nullptr) {
2065 THROW_MSG_0(vmSymbols::java_lang_NoSuchFieldError(), (char*) name);
2066 }
2067 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz));
2068 // Make sure class is initialized before handing id's out to static fields
2069 k->initialize(CHECK_NULL);
2070
2071 fieldDescriptor fd;
2072 if (!k->is_instance_klass() ||
2073 !InstanceKlass::cast(k)->find_field(fieldname, signame, true, &fd)) {
2074 THROW_MSG_0(vmSymbols::java_lang_NoSuchFieldError(), (char*) name);
2075 }
2076
2077 // A jfieldID for a static field is a JNIid specifying the field holder and the offset within the Klass*
2078 JNIid* id = fd.field_holder()->jni_id_for(fd.offset());
2079 debug_only(id->set_is_static_field_id();)
2080
2081 debug_only(id->verify(fd.field_holder()));
2082
2083 ret = jfieldIDWorkaround::to_static_jfieldID(id);
2084 return ret;
2085 JNI_END
2086
2087
2088 JNI_ENTRY(jobject, jni_GetStaticObjectField(JNIEnv *env, jclass clazz, jfieldID fieldID))
2089 HOTSPOT_JNI_GETSTATICOBJECTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID);
2090 #if INCLUDE_JNI_CHECK
2091 DEBUG_ONLY(Klass* param_k = jniCheck::validate_class(thread, clazz);)
2092 #endif // INCLUDE_JNI_CHECK
2093 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID);
2094 assert(id->is_static_field_id(), "invalid static field id");
2095 // Keep JVMTI addition small and only check enabled flag here.
2096 // jni_GetField_probe() assumes that is okay to create handles.
2097 if (JvmtiExport::should_post_field_access()) {
2098 JvmtiExport::jni_GetField_probe(thread, nullptr, nullptr, id->holder(), fieldID, true);
2099 }
2100 jobject ret = JNIHandles::make_local(THREAD, id->holder()->java_mirror()->obj_field(id->offset()));
2101 HOTSPOT_JNI_GETSTATICOBJECTFIELD_RETURN(ret);
2102 return ret;
2103 JNI_END
2104
2105
2106 #define DEFINE_GETSTATICFIELD(Return,Fieldname,Result \
2107 , EntryProbe, ReturnProbe) \
2108 \
2109 DT_RETURN_MARK_DECL_FOR(Result, GetStatic##Result##Field, Return \
2110 , ReturnProbe); \
2111 \
2112 JNI_ENTRY(Return, jni_GetStatic##Result##Field(JNIEnv *env, jclass clazz, jfieldID fieldID)) \
2113 EntryProbe; \
2114 Return ret = 0;\
2115 DT_RETURN_MARK_FOR(Result, GetStatic##Result##Field, Return, \
2116 (const Return&)ret);\
2117 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID); \
2118 assert(id->is_static_field_id(), "invalid static field id"); \
2119 /* Keep JVMTI addition small and only check enabled flag here. */ \
2120 /* jni_GetField_probe() assumes that is okay to create handles. */ \
2121 if (JvmtiExport::should_post_field_access()) { \
2122 JvmtiExport::jni_GetField_probe(thread, nullptr, nullptr, id->holder(), fieldID, true); \
2123 } \
2124 ret = id->holder()->java_mirror()-> Fieldname##_field (id->offset()); \
2125 return ret;\
2126 JNI_END
2127
2128 DEFINE_GETSTATICFIELD(jboolean, bool, Boolean
2129 , HOTSPOT_JNI_GETSTATICBOOLEANFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICBOOLEANFIELD_RETURN(_ret_ref))
2130 DEFINE_GETSTATICFIELD(jbyte, byte, Byte
2131 , HOTSPOT_JNI_GETSTATICBYTEFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICBYTEFIELD_RETURN(_ret_ref) )
2132 DEFINE_GETSTATICFIELD(jchar, char, Char
2133 , HOTSPOT_JNI_GETSTATICCHARFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICCHARFIELD_RETURN(_ret_ref) )
2134 DEFINE_GETSTATICFIELD(jshort, short, Short
2135 , HOTSPOT_JNI_GETSTATICSHORTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICSHORTFIELD_RETURN(_ret_ref) )
2136 DEFINE_GETSTATICFIELD(jint, int, Int
2137 , HOTSPOT_JNI_GETSTATICINTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICINTFIELD_RETURN(_ret_ref) )
2138 DEFINE_GETSTATICFIELD(jlong, long, Long
2139 , HOTSPOT_JNI_GETSTATICLONGFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICLONGFIELD_RETURN(_ret_ref) )
2140 // Float and double probes don't return value because dtrace doesn't currently support it
2141 DEFINE_GETSTATICFIELD(jfloat, float, Float
2142 , HOTSPOT_JNI_GETSTATICFLOATFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICFLOATFIELD_RETURN() )
2143 DEFINE_GETSTATICFIELD(jdouble, double, Double
2144 , HOTSPOT_JNI_GETSTATICDOUBLEFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICDOUBLEFIELD_RETURN() )
2145
2146 JNI_ENTRY(void, jni_SetStaticObjectField(JNIEnv *env, jclass clazz, jfieldID fieldID, jobject value))
2147 HOTSPOT_JNI_SETSTATICOBJECTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value);
2148 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID);
2149 assert(id->is_static_field_id(), "invalid static field id");
2150 // Keep JVMTI addition small and only check enabled flag here.
2151 // jni_SetField_probe() assumes that is okay to create handles.
2152 if (JvmtiExport::should_post_field_modification()) {
2153 jvalue field_value;
2154 field_value.l = value;
2155 JvmtiExport::jni_SetField_probe(thread, nullptr, nullptr, id->holder(), fieldID, true, JVM_SIGNATURE_CLASS, (jvalue *)&field_value);
2156 }
2157 id->holder()->java_mirror()->obj_field_put(id->offset(), JNIHandles::resolve(value));
2158 HOTSPOT_JNI_SETSTATICOBJECTFIELD_RETURN();
2159 JNI_END
2160
2161
2162
2163 #define DEFINE_SETSTATICFIELD(Argument,Fieldname,Result,SigType,unionType \
2164 , EntryProbe, ReturnProbe) \
2165 \
2166 JNI_ENTRY(void, jni_SetStatic##Result##Field(JNIEnv *env, jclass clazz, jfieldID fieldID, Argument value)) \
2167 EntryProbe; \
2168 \
2169 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID); \
2170 assert(id->is_static_field_id(), "invalid static field id"); \
2171 /* Keep JVMTI addition small and only check enabled flag here. */ \
2172 /* jni_SetField_probe() assumes that is okay to create handles. */ \
2173 if (JvmtiExport::should_post_field_modification()) { \
2174 jvalue field_value; \
2175 field_value.unionType = value; \
2176 JvmtiExport::jni_SetField_probe(thread, nullptr, nullptr, id->holder(), fieldID, true, SigType, (jvalue *)&field_value); \
2177 } \
2178 if (SigType == JVM_SIGNATURE_BOOLEAN) { value = ((jboolean)value) & 1; } \
2179 id->holder()->java_mirror()-> Fieldname##_field_put (id->offset(), value); \
2180 ReturnProbe;\
2181 JNI_END
2182
2183 DEFINE_SETSTATICFIELD(jboolean, bool, Boolean, JVM_SIGNATURE_BOOLEAN, z
2184 , HOTSPOT_JNI_SETSTATICBOOLEANFIELD_ENTRY(env, clazz, (uintptr_t)fieldID, value),
2185 HOTSPOT_JNI_SETSTATICBOOLEANFIELD_RETURN())
2186 DEFINE_SETSTATICFIELD(jbyte, byte, Byte, JVM_SIGNATURE_BYTE, b
2187 , HOTSPOT_JNI_SETSTATICBYTEFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value),
2188 HOTSPOT_JNI_SETSTATICBYTEFIELD_RETURN())
2189 DEFINE_SETSTATICFIELD(jchar, char, Char, JVM_SIGNATURE_CHAR, c
2190 , HOTSPOT_JNI_SETSTATICCHARFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value),
2191 HOTSPOT_JNI_SETSTATICCHARFIELD_RETURN())
2192 DEFINE_SETSTATICFIELD(jshort, short, Short, JVM_SIGNATURE_SHORT, s
2193 , HOTSPOT_JNI_SETSTATICSHORTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value),
2194 HOTSPOT_JNI_SETSTATICSHORTFIELD_RETURN())
2195 DEFINE_SETSTATICFIELD(jint, int, Int, JVM_SIGNATURE_INT, i
2196 , HOTSPOT_JNI_SETSTATICINTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value),
2197 HOTSPOT_JNI_SETSTATICINTFIELD_RETURN())
2198 DEFINE_SETSTATICFIELD(jlong, long, Long, JVM_SIGNATURE_LONG, j
2199 , HOTSPOT_JNI_SETSTATICLONGFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value),
2200 HOTSPOT_JNI_SETSTATICLONGFIELD_RETURN())
2201 // Float and double probes don't return value because dtrace doesn't currently support it
2202 DEFINE_SETSTATICFIELD(jfloat, float, Float, JVM_SIGNATURE_FLOAT, f
2203 , HOTSPOT_JNI_SETSTATICFLOATFIELD_ENTRY(env, clazz, (uintptr_t) fieldID),
2204 HOTSPOT_JNI_SETSTATICFLOATFIELD_RETURN())
2205 DEFINE_SETSTATICFIELD(jdouble, double, Double, JVM_SIGNATURE_DOUBLE, d
2206 , HOTSPOT_JNI_SETSTATICDOUBLEFIELD_ENTRY(env, clazz, (uintptr_t) fieldID),
2207 HOTSPOT_JNI_SETSTATICDOUBLEFIELD_RETURN())
2208
2209 //
2210 // String Operations
2211 //
2212
2213 // Unicode Interface
2214
2215 DT_RETURN_MARK_DECL(NewString, jstring
2216 , HOTSPOT_JNI_NEWSTRING_RETURN(_ret_ref));
2217
2218 JNI_ENTRY(jstring, jni_NewString(JNIEnv *env, const jchar *unicodeChars, jsize len))
2219 HOTSPOT_JNI_NEWSTRING_ENTRY(env, (uint16_t *) unicodeChars, len);
2220 jstring ret = nullptr;
2221 DT_RETURN_MARK(NewString, jstring, (const jstring&)ret);
2222 oop string=java_lang_String::create_oop_from_unicode((jchar*) unicodeChars, len, CHECK_NULL);
2223 ret = (jstring) JNIHandles::make_local(THREAD, string);
2224 return ret;
2225 JNI_END
2226
2227
2228 JNI_ENTRY_NO_PRESERVE(jsize, jni_GetStringLength(JNIEnv *env, jstring string))
2229 HOTSPOT_JNI_GETSTRINGLENGTH_ENTRY(env, string);
2230 jsize ret = 0;
2231 oop s = JNIHandles::resolve_non_null(string);
2232 ret = java_lang_String::length(s);
2233 HOTSPOT_JNI_GETSTRINGLENGTH_RETURN(ret);
2234 return ret;
2235 JNI_END
2236
2237
2238 JNI_ENTRY_NO_PRESERVE(const jchar*, jni_GetStringChars(
2239 JNIEnv *env, jstring string, jboolean *isCopy))
2240 HOTSPOT_JNI_GETSTRINGCHARS_ENTRY(env, string, (uintptr_t *) isCopy);
2241 jchar* buf = nullptr;
2242 oop s = JNIHandles::resolve_non_null(string);
2243 typeArrayOop s_value = java_lang_String::value(s);
2244 if (s_value != nullptr) {
2245 int s_len = java_lang_String::length(s, s_value);
2246 bool is_latin1 = java_lang_String::is_latin1(s);
2247 buf = NEW_C_HEAP_ARRAY_RETURN_NULL(jchar, s_len + 1, mtInternal); // add one for zero termination
2248 /* JNI Specification states return null on OOM */
2249 if (buf != nullptr) {
2250 if (s_len > 0) {
2251 if (!is_latin1) {
2252 ArrayAccess<>::arraycopy_to_native(s_value, (size_t) typeArrayOopDesc::element_offset<jchar>(0),
2253 buf, s_len);
2254 } else {
2255 for (int i = 0; i < s_len; i++) {
2256 buf[i] = ((jchar) s_value->byte_at(i)) & 0xff;
2257 }
2258 }
2259 }
2260 buf[s_len] = 0;
2261 //%note jni_5
2262 if (isCopy != nullptr) {
2263 *isCopy = JNI_TRUE;
2264 }
2265 }
2266 }
2267 HOTSPOT_JNI_GETSTRINGCHARS_RETURN(buf);
2268 return buf;
2269 JNI_END
2270
2271
2272 JNI_ENTRY_NO_PRESERVE(void, jni_ReleaseStringChars(JNIEnv *env, jstring str, const jchar *chars))
2273 HOTSPOT_JNI_RELEASESTRINGCHARS_ENTRY(env, str, (uint16_t *) chars);
2274 //%note jni_6
2275 if (chars != nullptr) {
2276 // Since String objects are supposed to be immutable, don't copy any
2277 // new data back. A bad user will have to go after the char array.
2278 FreeHeap((void*) chars);
2279 }
2280 HOTSPOT_JNI_RELEASESTRINGCHARS_RETURN();
2281 JNI_END
2282
2283
2284 // UTF Interface
2285
2286 DT_RETURN_MARK_DECL(NewStringUTF, jstring
2287 , HOTSPOT_JNI_NEWSTRINGUTF_RETURN(_ret_ref));
2288
2289 JNI_ENTRY(jstring, jni_NewStringUTF(JNIEnv *env, const char *bytes))
2290 HOTSPOT_JNI_NEWSTRINGUTF_ENTRY(env, (char *) bytes);
2291 jstring ret;
2292 DT_RETURN_MARK(NewStringUTF, jstring, (const jstring&)ret);
2293
2294 oop result = java_lang_String::create_oop_from_str((char*) bytes, CHECK_NULL);
2295 ret = (jstring) JNIHandles::make_local(THREAD, result);
2296 return ret;
2297 JNI_END
2298
2299
2300 JNI_ENTRY(jsize, jni_GetStringUTFLength(JNIEnv *env, jstring string))
2301 HOTSPOT_JNI_GETSTRINGUTFLENGTH_ENTRY(env, string);
2302 oop java_string = JNIHandles::resolve_non_null(string);
2303 jsize ret = java_lang_String::utf8_length(java_string);
2304 HOTSPOT_JNI_GETSTRINGUTFLENGTH_RETURN(ret);
2305 return ret;
2306 JNI_END
2307
2308
2309 JNI_ENTRY(const char*, jni_GetStringUTFChars(JNIEnv *env, jstring string, jboolean *isCopy))
2310 HOTSPOT_JNI_GETSTRINGUTFCHARS_ENTRY(env, string, (uintptr_t *) isCopy);
2311 char* result = nullptr;
2312 oop java_string = JNIHandles::resolve_non_null(string);
2313 typeArrayOop s_value = java_lang_String::value(java_string);
2314 if (s_value != nullptr) {
2315 size_t length = java_lang_String::utf8_length(java_string, s_value);
2316 /* JNI Specification states return null on OOM */
2317 result = AllocateHeap(length + 1, mtInternal, AllocFailStrategy::RETURN_NULL);
2318 if (result != nullptr) {
2319 java_lang_String::as_utf8_string(java_string, s_value, result, (int) length + 1);
2320 if (isCopy != nullptr) {
2321 *isCopy = JNI_TRUE;
2322 }
2323 }
2324 }
2325 HOTSPOT_JNI_GETSTRINGUTFCHARS_RETURN(result);
2326 return result;
2327 JNI_END
2328
2329
2330 JNI_LEAF(void, jni_ReleaseStringUTFChars(JNIEnv *env, jstring str, const char *chars))
2331 HOTSPOT_JNI_RELEASESTRINGUTFCHARS_ENTRY(env, str, (char *) chars);
2332 if (chars != nullptr) {
2333 FreeHeap((char*) chars);
2334 }
2335 HOTSPOT_JNI_RELEASESTRINGUTFCHARS_RETURN();
2336 JNI_END
2337
2338
2339 JNI_ENTRY_NO_PRESERVE(jsize, jni_GetArrayLength(JNIEnv *env, jarray array))
2340 HOTSPOT_JNI_GETARRAYLENGTH_ENTRY(env, array);
2341 arrayOop a = arrayOop(JNIHandles::resolve_non_null(array));
2342 assert(a->is_array(), "must be array");
2343 jsize ret = a->length();
2344 HOTSPOT_JNI_GETARRAYLENGTH_RETURN(ret);
2345 return ret;
2346 JNI_END
2347
2348
2349 //
2350 // Object Array Operations
2351 //
2352
2353 DT_RETURN_MARK_DECL(NewObjectArray, jobjectArray
2354 , HOTSPOT_JNI_NEWOBJECTARRAY_RETURN(_ret_ref));
2355
2356 JNI_ENTRY(jobjectArray, jni_NewObjectArray(JNIEnv *env, jsize length, jclass elementClass, jobject initialElement))
2357 HOTSPOT_JNI_NEWOBJECTARRAY_ENTRY(env, length, elementClass, initialElement);
2358 jobjectArray ret = nullptr;
2359 DT_RETURN_MARK(NewObjectArray, jobjectArray, (const jobjectArray&)ret);
2360 Klass* ek = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(elementClass));
2361 Klass* ak = ek->array_klass(CHECK_NULL);
2362 ObjArrayKlass::cast(ak)->initialize(CHECK_NULL);
2363 objArrayOop result = ObjArrayKlass::cast(ak)->allocate(length, CHECK_NULL);
2364 oop initial_value = JNIHandles::resolve(initialElement);
2365 if (initial_value != nullptr) { // array already initialized with null
2366 for (int index = 0; index < length; index++) {
2367 result->obj_at_put(index, initial_value);
2368 }
2369 }
2370 ret = (jobjectArray) JNIHandles::make_local(THREAD, result);
2371 return ret;
2372 JNI_END
2373
2374 DT_RETURN_MARK_DECL(GetObjectArrayElement, jobject
2375 , HOTSPOT_JNI_GETOBJECTARRAYELEMENT_RETURN(_ret_ref));
2376
2377 JNI_ENTRY(jobject, jni_GetObjectArrayElement(JNIEnv *env, jobjectArray array, jsize index))
2378 HOTSPOT_JNI_GETOBJECTARRAYELEMENT_ENTRY(env, array, index);
2379 jobject ret = nullptr;
2380 DT_RETURN_MARK(GetObjectArrayElement, jobject, (const jobject&)ret);
2381 oop res = nullptr;
2382 arrayOop arr((arrayOop)JNIHandles::resolve_non_null(array));
2383 if (arr->is_within_bounds(index)) {
2384 if (arr->is_flatArray()) {
2385 flatArrayOop a = flatArrayOop(JNIHandles::resolve_non_null(array));
2386 flatArrayHandle vah(thread, a);
2387 res = flatArrayOopDesc::value_alloc_copy_from_index(vah, index, CHECK_NULL);
2388 assert(res != nullptr, "Must be set in one of two paths above");
2389 } else {
2390 assert(arr->is_objArray(), "If not a valueArray. must be an objArray");
2391 objArrayOop a = objArrayOop(JNIHandles::resolve_non_null(array));
2392 res = a->obj_at(index);
2393 }
2394 } else {
2395 ResourceMark rm(THREAD);
2396 stringStream ss;
2397 ss.print("Index %d out of bounds for length %d", index,arr->length());
2398 THROW_MSG_0(vmSymbols::java_lang_ArrayIndexOutOfBoundsException(), ss.as_string());
2399 }
2400 ret = JNIHandles::make_local(THREAD, res);
2401 return ret;
2402 JNI_END
2403
2404 DT_VOID_RETURN_MARK_DECL(SetObjectArrayElement
2405 , HOTSPOT_JNI_SETOBJECTARRAYELEMENT_RETURN());
2406
2407 JNI_ENTRY(void, jni_SetObjectArrayElement(JNIEnv *env, jobjectArray array, jsize index, jobject value))
2408 HOTSPOT_JNI_SETOBJECTARRAYELEMENT_ENTRY(env, array, index, value);
2409 DT_VOID_RETURN_MARK(SetObjectArrayElement);
2410
2411 bool oob = false;
2412 int length = -1;
2413 oop res = nullptr;
2414 arrayOop arr((arrayOop)JNIHandles::resolve_non_null(array));
2415 if (arr->is_within_bounds(index)) {
2416 if (arr->is_flatArray()) {
2417 flatArrayOop a = flatArrayOop(JNIHandles::resolve_non_null(array));
2418 oop v = JNIHandles::resolve(value);
2419 FlatArrayKlass* vaklass = FlatArrayKlass::cast(a->klass());
2420 InlineKlass* element_vklass = vaklass->element_klass();
2421 if (v != nullptr && v->is_a(element_vklass)) {
2422 a->value_copy_to_index(v, index);
2423 } else {
2424 ResourceMark rm(THREAD);
2425 stringStream ss;
2426 Klass *kl = FlatArrayKlass::cast(a->klass());
2427 ss.print("type mismatch: can not store %s to %s[%d]",
2428 v->klass()->external_name(),
2429 kl->external_name(),
2430 index);
2431 for (int dims = ArrayKlass::cast(a->klass())->dimension(); dims > 1; --dims) {
2432 ss.print("[]");
2433 }
2434 THROW_MSG(vmSymbols::java_lang_ArrayStoreException(), ss.as_string());
2435 }
2436 } else {
2437 assert(arr->is_objArray(), "If not a valueArray. must be an objArray");
2438 objArrayOop a = objArrayOop(JNIHandles::resolve_non_null(array));
2439 oop v = JNIHandles::resolve(value);
2440 if (v == nullptr || v->is_a(ObjArrayKlass::cast(a->klass())->element_klass())) {
2441 a->obj_at_put(index, v);
2442 } else {
2443 ResourceMark rm(THREAD);
2444 stringStream ss;
2445 Klass *bottom_kl = ObjArrayKlass::cast(a->klass())->bottom_klass();
2446 ss.print("type mismatch: can not store %s to %s[%d]",
2447 v->klass()->external_name(),
2448 bottom_kl->is_typeArray_klass() ? type2name_tab[ArrayKlass::cast(bottom_kl)->element_type()] : bottom_kl->external_name(),
2449 index);
2450 for (int dims = ArrayKlass::cast(a->klass())->dimension(); dims > 1; --dims) {
2451 ss.print("[]");
2452 }
2453 THROW_MSG(vmSymbols::java_lang_ArrayStoreException(), ss.as_string());
2454 }
2455 }
2456 } else {
2457 ResourceMark rm(THREAD);
2458 stringStream ss;
2459 ss.print("Index %d out of bounds for length %d", index, arr->length());
2460 THROW_MSG(vmSymbols::java_lang_ArrayIndexOutOfBoundsException(), ss.as_string());
2461 }
2462 JNI_END
2463
2464
2465
2466 #define DEFINE_NEWSCALARARRAY(Return,Allocator,Result \
2467 ,EntryProbe,ReturnProbe) \
2468 \
2469 DT_RETURN_MARK_DECL(New##Result##Array, Return \
2470 , ReturnProbe); \
2471 \
2472 JNI_ENTRY(Return, \
2473 jni_New##Result##Array(JNIEnv *env, jsize len)) \
2474 EntryProbe; \
2475 Return ret = nullptr;\
2476 DT_RETURN_MARK(New##Result##Array, Return, (const Return&)ret);\
2477 \
2478 oop obj= oopFactory::Allocator(len, CHECK_NULL); \
2479 ret = (Return) JNIHandles::make_local(THREAD, obj); \
2480 return ret;\
2481 JNI_END
2482
2483 DEFINE_NEWSCALARARRAY(jbooleanArray, new_boolArray, Boolean,
2484 HOTSPOT_JNI_NEWBOOLEANARRAY_ENTRY(env, len),
2485 HOTSPOT_JNI_NEWBOOLEANARRAY_RETURN(_ret_ref))
2486 DEFINE_NEWSCALARARRAY(jbyteArray, new_byteArray, Byte,
2487 HOTSPOT_JNI_NEWBYTEARRAY_ENTRY(env, len),
2488 HOTSPOT_JNI_NEWBYTEARRAY_RETURN(_ret_ref))
2489 DEFINE_NEWSCALARARRAY(jshortArray, new_shortArray, Short,
2490 HOTSPOT_JNI_NEWSHORTARRAY_ENTRY(env, len),
2491 HOTSPOT_JNI_NEWSHORTARRAY_RETURN(_ret_ref))
2492 DEFINE_NEWSCALARARRAY(jcharArray, new_charArray, Char,
2493 HOTSPOT_JNI_NEWCHARARRAY_ENTRY(env, len),
2494 HOTSPOT_JNI_NEWCHARARRAY_RETURN(_ret_ref))
2495 DEFINE_NEWSCALARARRAY(jintArray, new_intArray, Int,
2496 HOTSPOT_JNI_NEWINTARRAY_ENTRY(env, len),
2497 HOTSPOT_JNI_NEWINTARRAY_RETURN(_ret_ref))
2498 DEFINE_NEWSCALARARRAY(jlongArray, new_longArray, Long,
2499 HOTSPOT_JNI_NEWLONGARRAY_ENTRY(env, len),
2500 HOTSPOT_JNI_NEWLONGARRAY_RETURN(_ret_ref))
2501 DEFINE_NEWSCALARARRAY(jfloatArray, new_floatArray, Float,
2502 HOTSPOT_JNI_NEWFLOATARRAY_ENTRY(env, len),
2503 HOTSPOT_JNI_NEWFLOATARRAY_RETURN(_ret_ref))
2504 DEFINE_NEWSCALARARRAY(jdoubleArray, new_doubleArray, Double,
2505 HOTSPOT_JNI_NEWDOUBLEARRAY_ENTRY(env, len),
2506 HOTSPOT_JNI_NEWDOUBLEARRAY_RETURN(_ret_ref))
2507
2508 // Return an address which will fault if the caller writes to it.
2509
2510 static char* get_bad_address() {
2511 static char* bad_address = nullptr;
2512 if (bad_address == nullptr) {
2513 size_t size = os::vm_allocation_granularity();
2514 bad_address = os::reserve_memory(size);
2515 if (bad_address != nullptr) {
2516 os::protect_memory(bad_address, size, os::MEM_PROT_READ,
2517 /*is_committed*/false);
2518 MemTracker::record_virtual_memory_type((void*)bad_address, mtInternal);
2519 }
2520 }
2521 return bad_address;
2522 }
2523
2524
2525
2526 #define DEFINE_GETSCALARARRAYELEMENTS(ElementTag,ElementType,Result, Tag \
2527 , EntryProbe, ReturnProbe) \
2528 \
2529 JNI_ENTRY_NO_PRESERVE(ElementType*, \
2530 jni_Get##Result##ArrayElements(JNIEnv *env, ElementType##Array array, jboolean *isCopy)) \
2531 EntryProbe; \
2532 /* allocate an chunk of memory in c land */ \
2533 typeArrayOop a = typeArrayOop(JNIHandles::resolve_non_null(array)); \
2534 ElementType* result; \
2535 int len = a->length(); \
2536 if (len == 0) { \
2537 if (isCopy != nullptr) { \
2538 *isCopy = JNI_FALSE; \
2539 } \
2540 /* Empty array: legal but useless, can't return null. \
2541 * Return a pointer to something useless. \
2542 * Avoid asserts in typeArrayOop. */ \
2543 result = (ElementType*)get_bad_address(); \
2544 } else { \
2545 /* JNI Specification states return null on OOM */ \
2546 result = NEW_C_HEAP_ARRAY_RETURN_NULL(ElementType, len, mtInternal); \
2547 if (result != nullptr) { \
2548 /* copy the array to the c chunk */ \
2549 ArrayAccess<>::arraycopy_to_native(a, typeArrayOopDesc::element_offset<ElementType>(0), \
2550 result, len); \
2551 if (isCopy) { \
2552 *isCopy = JNI_TRUE; \
2553 } \
2554 } \
2555 } \
2556 ReturnProbe; \
2557 return result; \
2558 JNI_END
2559
2560 DEFINE_GETSCALARARRAYELEMENTS(T_BOOLEAN, jboolean, Boolean, bool
2561 , HOTSPOT_JNI_GETBOOLEANARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy),
2562 HOTSPOT_JNI_GETBOOLEANARRAYELEMENTS_RETURN((uintptr_t*)result))
2563 DEFINE_GETSCALARARRAYELEMENTS(T_BYTE, jbyte, Byte, byte
2564 , HOTSPOT_JNI_GETBYTEARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy),
2565 HOTSPOT_JNI_GETBYTEARRAYELEMENTS_RETURN((char*)result))
2566 DEFINE_GETSCALARARRAYELEMENTS(T_SHORT, jshort, Short, short
2567 , HOTSPOT_JNI_GETSHORTARRAYELEMENTS_ENTRY(env, (uint16_t*) array, (uintptr_t *) isCopy),
2568 HOTSPOT_JNI_GETSHORTARRAYELEMENTS_RETURN((uint16_t*)result))
2569 DEFINE_GETSCALARARRAYELEMENTS(T_CHAR, jchar, Char, char
2570 , HOTSPOT_JNI_GETCHARARRAYELEMENTS_ENTRY(env, (uint16_t*) array, (uintptr_t *) isCopy),
2571 HOTSPOT_JNI_GETCHARARRAYELEMENTS_RETURN(result))
2572 DEFINE_GETSCALARARRAYELEMENTS(T_INT, jint, Int, int
2573 , HOTSPOT_JNI_GETINTARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy),
2574 HOTSPOT_JNI_GETINTARRAYELEMENTS_RETURN((uint32_t*)result))
2575 DEFINE_GETSCALARARRAYELEMENTS(T_LONG, jlong, Long, long
2576 , HOTSPOT_JNI_GETLONGARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy),
2577 HOTSPOT_JNI_GETLONGARRAYELEMENTS_RETURN(((uintptr_t*)result)))
2578 // Float and double probes don't return value because dtrace doesn't currently support it
2579 DEFINE_GETSCALARARRAYELEMENTS(T_FLOAT, jfloat, Float, float
2580 , HOTSPOT_JNI_GETFLOATARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy),
2581 HOTSPOT_JNI_GETFLOATARRAYELEMENTS_RETURN(result))
2582 DEFINE_GETSCALARARRAYELEMENTS(T_DOUBLE, jdouble, Double, double
2583 , HOTSPOT_JNI_GETDOUBLEARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy),
2584 HOTSPOT_JNI_GETDOUBLEARRAYELEMENTS_RETURN(result))
2585
2586
2587 #define DEFINE_RELEASESCALARARRAYELEMENTS(ElementTag,ElementType,Result,Tag \
2588 , EntryProbe, ReturnProbe);\
2589 \
2590 JNI_ENTRY_NO_PRESERVE(void, \
2591 jni_Release##Result##ArrayElements(JNIEnv *env, ElementType##Array array, \
2592 ElementType *buf, jint mode)) \
2593 EntryProbe; \
2594 typeArrayOop a = typeArrayOop(JNIHandles::resolve_non_null(array)); \
2595 int len = a->length(); \
2596 if (len != 0) { /* Empty array: nothing to free or copy. */ \
2597 if ((mode == 0) || (mode == JNI_COMMIT)) { \
2598 ArrayAccess<>::arraycopy_from_native(buf, a, typeArrayOopDesc::element_offset<ElementType>(0), len); \
2599 } \
2600 if ((mode == 0) || (mode == JNI_ABORT)) { \
2601 FreeHeap(buf); \
2602 } \
2603 } \
2604 ReturnProbe; \
2605 JNI_END
2606
2607 DEFINE_RELEASESCALARARRAYELEMENTS(T_BOOLEAN, jboolean, Boolean, bool
2608 , HOTSPOT_JNI_RELEASEBOOLEANARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) buf, mode),
2609 HOTSPOT_JNI_RELEASEBOOLEANARRAYELEMENTS_RETURN())
2610 DEFINE_RELEASESCALARARRAYELEMENTS(T_BYTE, jbyte, Byte, byte
2611 , HOTSPOT_JNI_RELEASEBYTEARRAYELEMENTS_ENTRY(env, array, (char *) buf, mode),
2612 HOTSPOT_JNI_RELEASEBYTEARRAYELEMENTS_RETURN())
2613 DEFINE_RELEASESCALARARRAYELEMENTS(T_SHORT, jshort, Short, short
2614 , HOTSPOT_JNI_RELEASESHORTARRAYELEMENTS_ENTRY(env, array, (uint16_t *) buf, mode),
2615 HOTSPOT_JNI_RELEASESHORTARRAYELEMENTS_RETURN())
2616 DEFINE_RELEASESCALARARRAYELEMENTS(T_CHAR, jchar, Char, char
2617 , HOTSPOT_JNI_RELEASECHARARRAYELEMENTS_ENTRY(env, array, (uint16_t *) buf, mode),
2618 HOTSPOT_JNI_RELEASECHARARRAYELEMENTS_RETURN())
2619 DEFINE_RELEASESCALARARRAYELEMENTS(T_INT, jint, Int, int
2620 , HOTSPOT_JNI_RELEASEINTARRAYELEMENTS_ENTRY(env, array, (uint32_t *) buf, mode),
2621 HOTSPOT_JNI_RELEASEINTARRAYELEMENTS_RETURN())
2622 DEFINE_RELEASESCALARARRAYELEMENTS(T_LONG, jlong, Long, long
2623 , HOTSPOT_JNI_RELEASELONGARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) buf, mode),
2624 HOTSPOT_JNI_RELEASELONGARRAYELEMENTS_RETURN())
2625 DEFINE_RELEASESCALARARRAYELEMENTS(T_FLOAT, jfloat, Float, float
2626 , HOTSPOT_JNI_RELEASEFLOATARRAYELEMENTS_ENTRY(env, array, (float *) buf, mode),
2627 HOTSPOT_JNI_RELEASEFLOATARRAYELEMENTS_RETURN())
2628 DEFINE_RELEASESCALARARRAYELEMENTS(T_DOUBLE, jdouble, Double, double
2629 , HOTSPOT_JNI_RELEASEDOUBLEARRAYELEMENTS_ENTRY(env, array, (double *) buf, mode),
2630 HOTSPOT_JNI_RELEASEDOUBLEARRAYELEMENTS_RETURN())
2631
2632 static void check_bounds(jsize start, jsize copy_len, jsize array_len, TRAPS) {
2633 ResourceMark rm(THREAD);
2634 if (copy_len < 0) {
2635 stringStream ss;
2636 ss.print("Length %d is negative", copy_len);
2637 THROW_MSG(vmSymbols::java_lang_ArrayIndexOutOfBoundsException(), ss.as_string());
2638 } else if (start < 0 || (start > array_len - copy_len)) {
2639 stringStream ss;
2640 ss.print("Array region %d.." INT64_FORMAT " out of bounds for length %d",
2641 start, (int64_t)start+(int64_t)copy_len, array_len);
2642 THROW_MSG(vmSymbols::java_lang_ArrayIndexOutOfBoundsException(), ss.as_string());
2643 }
2644 }
2645
2646 #define DEFINE_GETSCALARARRAYREGION(ElementTag,ElementType,Result, Tag \
2647 , EntryProbe, ReturnProbe); \
2648 DT_VOID_RETURN_MARK_DECL(Get##Result##ArrayRegion \
2649 , ReturnProbe); \
2650 \
2651 JNI_ENTRY(void, \
2652 jni_Get##Result##ArrayRegion(JNIEnv *env, ElementType##Array array, jsize start, \
2653 jsize len, ElementType *buf)) \
2654 EntryProbe; \
2655 DT_VOID_RETURN_MARK(Get##Result##ArrayRegion); \
2656 typeArrayOop src = typeArrayOop(JNIHandles::resolve_non_null(array)); \
2657 check_bounds(start, len, src->length(), CHECK); \
2658 if (len > 0) { \
2659 ArrayAccess<>::arraycopy_to_native(src, typeArrayOopDesc::element_offset<ElementType>(start), buf, len); \
2660 } \
2661 JNI_END
2662
2663 DEFINE_GETSCALARARRAYREGION(T_BOOLEAN, jboolean,Boolean, bool
2664 , HOTSPOT_JNI_GETBOOLEANARRAYREGION_ENTRY(env, array, start, len, (uintptr_t *) buf),
2665 HOTSPOT_JNI_GETBOOLEANARRAYREGION_RETURN());
2666 DEFINE_GETSCALARARRAYREGION(T_BYTE, jbyte, Byte, byte
2667 , HOTSPOT_JNI_GETBYTEARRAYREGION_ENTRY(env, array, start, len, (char *) buf),
2668 HOTSPOT_JNI_GETBYTEARRAYREGION_RETURN());
2669 DEFINE_GETSCALARARRAYREGION(T_SHORT, jshort, Short, short
2670 , HOTSPOT_JNI_GETSHORTARRAYREGION_ENTRY(env, array, start, len, (uint16_t *) buf),
2671 HOTSPOT_JNI_GETSHORTARRAYREGION_RETURN());
2672 DEFINE_GETSCALARARRAYREGION(T_CHAR, jchar, Char, char
2673 , HOTSPOT_JNI_GETCHARARRAYREGION_ENTRY(env, array, start, len, (uint16_t*) buf),
2674 HOTSPOT_JNI_GETCHARARRAYREGION_RETURN());
2675 DEFINE_GETSCALARARRAYREGION(T_INT, jint, Int, int
2676 , HOTSPOT_JNI_GETINTARRAYREGION_ENTRY(env, array, start, len, (uint32_t*) buf),
2677 HOTSPOT_JNI_GETINTARRAYREGION_RETURN());
2678 DEFINE_GETSCALARARRAYREGION(T_LONG, jlong, Long, long
2679 , HOTSPOT_JNI_GETLONGARRAYREGION_ENTRY(env, array, start, len, (uintptr_t *) buf),
2680 HOTSPOT_JNI_GETLONGARRAYREGION_RETURN());
2681 DEFINE_GETSCALARARRAYREGION(T_FLOAT, jfloat, Float, float
2682 , HOTSPOT_JNI_GETFLOATARRAYREGION_ENTRY(env, array, start, len, (float *) buf),
2683 HOTSPOT_JNI_GETFLOATARRAYREGION_RETURN());
2684 DEFINE_GETSCALARARRAYREGION(T_DOUBLE, jdouble, Double, double
2685 , HOTSPOT_JNI_GETDOUBLEARRAYREGION_ENTRY(env, array, start, len, (double *) buf),
2686 HOTSPOT_JNI_GETDOUBLEARRAYREGION_RETURN());
2687
2688
2689 #define DEFINE_SETSCALARARRAYREGION(ElementTag,ElementType,Result, Tag \
2690 , EntryProbe, ReturnProbe); \
2691 DT_VOID_RETURN_MARK_DECL(Set##Result##ArrayRegion \
2692 ,ReturnProbe); \
2693 \
2694 JNI_ENTRY(void, \
2695 jni_Set##Result##ArrayRegion(JNIEnv *env, ElementType##Array array, jsize start, \
2696 jsize len, const ElementType *buf)) \
2697 EntryProbe; \
2698 DT_VOID_RETURN_MARK(Set##Result##ArrayRegion); \
2699 typeArrayOop dst = typeArrayOop(JNIHandles::resolve_non_null(array)); \
2700 check_bounds(start, len, dst->length(), CHECK); \
2701 if (len > 0) { \
2702 ArrayAccess<>::arraycopy_from_native(buf, dst, typeArrayOopDesc::element_offset<ElementType>(start), len); \
2703 } \
2704 JNI_END
2705
2706 DEFINE_SETSCALARARRAYREGION(T_BOOLEAN, jboolean, Boolean, bool
2707 , HOTSPOT_JNI_SETBOOLEANARRAYREGION_ENTRY(env, array, start, len, (uintptr_t *)buf),
2708 HOTSPOT_JNI_SETBOOLEANARRAYREGION_RETURN())
2709 DEFINE_SETSCALARARRAYREGION(T_BYTE, jbyte, Byte, byte
2710 , HOTSPOT_JNI_SETBYTEARRAYREGION_ENTRY(env, array, start, len, (char *) buf),
2711 HOTSPOT_JNI_SETBYTEARRAYREGION_RETURN())
2712 DEFINE_SETSCALARARRAYREGION(T_SHORT, jshort, Short, short
2713 , HOTSPOT_JNI_SETSHORTARRAYREGION_ENTRY(env, array, start, len, (uint16_t *) buf),
2714 HOTSPOT_JNI_SETSHORTARRAYREGION_RETURN())
2715 DEFINE_SETSCALARARRAYREGION(T_CHAR, jchar, Char, char
2716 , HOTSPOT_JNI_SETCHARARRAYREGION_ENTRY(env, array, start, len, (uint16_t *) buf),
2717 HOTSPOT_JNI_SETCHARARRAYREGION_RETURN())
2718 DEFINE_SETSCALARARRAYREGION(T_INT, jint, Int, int
2719 , HOTSPOT_JNI_SETINTARRAYREGION_ENTRY(env, array, start, len, (uint32_t *) buf),
2720 HOTSPOT_JNI_SETINTARRAYREGION_RETURN())
2721 DEFINE_SETSCALARARRAYREGION(T_LONG, jlong, Long, long
2722 , HOTSPOT_JNI_SETLONGARRAYREGION_ENTRY(env, array, start, len, (uintptr_t *) buf),
2723 HOTSPOT_JNI_SETLONGARRAYREGION_RETURN())
2724 DEFINE_SETSCALARARRAYREGION(T_FLOAT, jfloat, Float, float
2725 , HOTSPOT_JNI_SETFLOATARRAYREGION_ENTRY(env, array, start, len, (float *) buf),
2726 HOTSPOT_JNI_SETFLOATARRAYREGION_RETURN())
2727 DEFINE_SETSCALARARRAYREGION(T_DOUBLE, jdouble, Double, double
2728 , HOTSPOT_JNI_SETDOUBLEARRAYREGION_ENTRY(env, array, start, len, (double *) buf),
2729 HOTSPOT_JNI_SETDOUBLEARRAYREGION_RETURN())
2730
2731
2732 DT_RETURN_MARK_DECL(RegisterNatives, jint
2733 , HOTSPOT_JNI_REGISTERNATIVES_RETURN(_ret_ref));
2734
2735 JNI_ENTRY(jint, jni_RegisterNatives(JNIEnv *env, jclass clazz,
2736 const JNINativeMethod *methods,
2737 jint nMethods))
2738 HOTSPOT_JNI_REGISTERNATIVES_ENTRY(env, clazz, (void *) methods, nMethods);
2739 jint ret = 0;
2740 DT_RETURN_MARK(RegisterNatives, jint, (const jint&)ret);
2741
2742 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz));
2743
2744 // There are no restrictions on native code registering native methods,
2745 // which allows agents to redefine the bindings to native methods, however
2746 // we issue a warning if any code running outside of the boot/platform
2747 // loader is rebinding any native methods in classes loaded by the
2748 // boot/platform loader that are in named modules. That will catch changes
2749 // to platform classes while excluding classes added to the bootclasspath.
2750 bool do_warning = false;
2751
2752 // Only instanceKlasses can have native methods
2753 if (k->is_instance_klass()) {
2754 oop cl = k->class_loader();
2755 InstanceKlass* ik = InstanceKlass::cast(k);
2756 // Check for a platform class
2757 if ((cl == nullptr || SystemDictionary::is_platform_class_loader(cl)) &&
2758 ik->module()->is_named()) {
2759 Klass* caller = thread->security_get_caller_class(1);
2760 // If no caller class, or caller class has a different loader, then
2761 // issue a warning below.
2762 do_warning = (caller == nullptr) || caller->class_loader() != cl;
2763 }
2764 }
2765
2766
2767 for (int index = 0; index < nMethods; index++) {
2768 const char* meth_name = methods[index].name;
2769 const char* meth_sig = methods[index].signature;
2770 int meth_name_len = (int)strlen(meth_name);
2771
2772 // The class should have been loaded (we have an instance of the class
2773 // passed in) so the method and signature should already be in the symbol
2774 // table. If they're not there, the method doesn't exist.
2775 TempNewSymbol name = SymbolTable::probe(meth_name, meth_name_len);
2776 TempNewSymbol signature = SymbolTable::probe(meth_sig, (int)strlen(meth_sig));
2777
2778 if (name == nullptr || signature == nullptr) {
2779 ResourceMark rm(THREAD);
2780 stringStream st;
2781 st.print("Method %s.%s%s not found", k->external_name(), meth_name, meth_sig);
2782 // Must return negative value on failure
2783 THROW_MSG_(vmSymbols::java_lang_NoSuchMethodError(), st.as_string(), -1);
2784 }
2785
2786 if (do_warning) {
2787 ResourceMark rm(THREAD);
2788 log_warning(jni, resolve)("Re-registering of platform native method: %s.%s%s "
2789 "from code in a different classloader", k->external_name(), meth_name, meth_sig);
2790 }
2791
2792 bool res = Method::register_native(k, name, signature,
2793 (address) methods[index].fnPtr, THREAD);
2794 if (!res) {
2795 ret = -1;
2796 break;
2797 }
2798 }
2799 return ret;
2800 JNI_END
2801
2802
2803 JNI_ENTRY(jint, jni_UnregisterNatives(JNIEnv *env, jclass clazz))
2804 HOTSPOT_JNI_UNREGISTERNATIVES_ENTRY(env, clazz);
2805 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz));
2806 //%note jni_2
2807 if (k->is_instance_klass()) {
2808 for (int index = 0; index < InstanceKlass::cast(k)->methods()->length(); index++) {
2809 Method* m = InstanceKlass::cast(k)->methods()->at(index);
2810 if (m->is_native()) {
2811 m->clear_native_function();
2812 m->set_signature_handler(nullptr);
2813 }
2814 }
2815 }
2816 HOTSPOT_JNI_UNREGISTERNATIVES_RETURN(0);
2817 return 0;
2818 JNI_END
2819
2820 //
2821 // Monitor functions
2822 //
2823
2824 DT_RETURN_MARK_DECL(MonitorEnter, jint
2825 , HOTSPOT_JNI_MONITORENTER_RETURN(_ret_ref));
2826
2827 JNI_ENTRY(jint, jni_MonitorEnter(JNIEnv *env, jobject jobj))
2828 HOTSPOT_JNI_MONITORENTER_ENTRY(env, jobj);
2829 jint ret = JNI_ERR;
2830 DT_RETURN_MARK(MonitorEnter, jint, (const jint&)ret);
2831
2832 // If the object is null, we can't do anything with it
2833 if (jobj == nullptr) {
2834 THROW_(vmSymbols::java_lang_NullPointerException(), JNI_ERR);
2835 }
2836
2837 Handle obj(thread, JNIHandles::resolve_non_null(jobj));
2838 ObjectSynchronizer::jni_enter(obj, thread);
2839 return JNI_OK;
2840 JNI_END
2841
2842 DT_RETURN_MARK_DECL(MonitorExit, jint
2843 , HOTSPOT_JNI_MONITOREXIT_RETURN(_ret_ref));
2844
2845 JNI_ENTRY(jint, jni_MonitorExit(JNIEnv *env, jobject jobj))
2846 HOTSPOT_JNI_MONITOREXIT_ENTRY(env, jobj);
2847 jint ret = JNI_ERR;
2848 DT_RETURN_MARK(MonitorExit, jint, (const jint&)ret);
2849
2850 // Don't do anything with a null object
2851 if (jobj == nullptr) {
2852 THROW_(vmSymbols::java_lang_NullPointerException(), JNI_ERR);
2853 }
2854
2855 Handle obj(THREAD, JNIHandles::resolve_non_null(jobj));
2856 ObjectSynchronizer::jni_exit(obj(), CHECK_(JNI_ERR));
2857 return JNI_OK;
2858 JNI_END
2859
2860 //
2861 // Extensions
2862 //
2863
2864 DT_VOID_RETURN_MARK_DECL(GetStringRegion
2865 , HOTSPOT_JNI_GETSTRINGREGION_RETURN());
2866
2867 JNI_ENTRY(void, jni_GetStringRegion(JNIEnv *env, jstring string, jsize start, jsize len, jchar *buf))
2868 HOTSPOT_JNI_GETSTRINGREGION_ENTRY(env, string, start, len, buf);
2869 DT_VOID_RETURN_MARK(GetStringRegion);
2870 oop s = JNIHandles::resolve_non_null(string);
2871 typeArrayOop s_value = java_lang_String::value(s);
2872 int s_len = java_lang_String::length(s, s_value);
2873 if (start < 0 || len < 0 || start > s_len - len) {
2874 THROW(vmSymbols::java_lang_StringIndexOutOfBoundsException());
2875 } else {
2876 if (len > 0) {
2877 bool is_latin1 = java_lang_String::is_latin1(s);
2878 if (!is_latin1) {
2879 ArrayAccess<>::arraycopy_to_native(s_value, typeArrayOopDesc::element_offset<jchar>(start),
2880 buf, len);
2881 } else {
2882 for (int i = 0; i < len; i++) {
2883 buf[i] = ((jchar) s_value->byte_at(i + start)) & 0xff;
2884 }
2885 }
2886 }
2887 }
2888 JNI_END
2889
2890 DT_VOID_RETURN_MARK_DECL(GetStringUTFRegion
2891 , HOTSPOT_JNI_GETSTRINGUTFREGION_RETURN());
2892
2893 JNI_ENTRY(void, jni_GetStringUTFRegion(JNIEnv *env, jstring string, jsize start, jsize len, char *buf))
2894 HOTSPOT_JNI_GETSTRINGUTFREGION_ENTRY(env, string, start, len, buf);
2895 DT_VOID_RETURN_MARK(GetStringUTFRegion);
2896 oop s = JNIHandles::resolve_non_null(string);
2897 typeArrayOop s_value = java_lang_String::value(s);
2898 int s_len = java_lang_String::length(s, s_value);
2899 if (start < 0 || len < 0 || start > s_len - len) {
2900 THROW(vmSymbols::java_lang_StringIndexOutOfBoundsException());
2901 } else {
2902 //%note jni_7
2903 if (len > 0) {
2904 // Assume the buffer is large enough as the JNI spec. does not require user error checking
2905 java_lang_String::as_utf8_string(s, s_value, start, len, buf, INT_MAX);
2906 // as_utf8_string null-terminates the result string
2907 } else {
2908 // JDK null-terminates the buffer even in len is zero
2909 if (buf != nullptr) {
2910 buf[0] = 0;
2911 }
2912 }
2913 }
2914 JNI_END
2915
2916 JNI_ENTRY(void*, jni_GetPrimitiveArrayCritical(JNIEnv *env, jarray array, jboolean *isCopy))
2917 HOTSPOT_JNI_GETPRIMITIVEARRAYCRITICAL_ENTRY(env, array, (uintptr_t *) isCopy);
2918 Handle a(thread, JNIHandles::resolve_non_null(array));
2919 assert(a->is_typeArray(), "just checking");
2920
2921 // Pin object
2922 Universe::heap()->pin_object(thread, a());
2923
2924 BasicType type = TypeArrayKlass::cast(a->klass())->element_type();
2925 void* ret = arrayOop(a())->base(type);
2926 if (isCopy != nullptr) {
2927 *isCopy = JNI_FALSE;
2928 }
2929 HOTSPOT_JNI_GETPRIMITIVEARRAYCRITICAL_RETURN(ret);
2930 return ret;
2931 JNI_END
2932
2933
2934 JNI_ENTRY(void, jni_ReleasePrimitiveArrayCritical(JNIEnv *env, jarray array, void *carray, jint mode))
2935 HOTSPOT_JNI_RELEASEPRIMITIVEARRAYCRITICAL_ENTRY(env, array, carray, mode);
2936 // Unpin object
2937 Universe::heap()->unpin_object(thread, JNIHandles::resolve_non_null(array));
2938 HOTSPOT_JNI_RELEASEPRIMITIVEARRAYCRITICAL_RETURN();
2939 JNI_END
2940
2941
2942 JNI_ENTRY(const jchar*, jni_GetStringCritical(JNIEnv *env, jstring string, jboolean *isCopy))
2943 HOTSPOT_JNI_GETSTRINGCRITICAL_ENTRY(env, string, (uintptr_t *) isCopy);
2944 oop s = JNIHandles::resolve_non_null(string);
2945 jchar* ret;
2946 if (!java_lang_String::is_latin1(s)) {
2947 typeArrayHandle s_value(thread, java_lang_String::value(s));
2948
2949 // Pin value array
2950 Universe::heap()->pin_object(thread, s_value());
2951
2952 ret = (jchar*) s_value->base(T_CHAR);
2953 if (isCopy != nullptr) *isCopy = JNI_FALSE;
2954 } else {
2955 // Inflate latin1 encoded string to UTF16
2956 typeArrayOop s_value = java_lang_String::value(s);
2957 int s_len = java_lang_String::length(s, s_value);
2958 ret = NEW_C_HEAP_ARRAY_RETURN_NULL(jchar, s_len + 1, mtInternal); // add one for zero termination
2959 /* JNI Specification states return null on OOM */
2960 if (ret != nullptr) {
2961 for (int i = 0; i < s_len; i++) {
2962 ret[i] = ((jchar) s_value->byte_at(i)) & 0xff;
2963 }
2964 ret[s_len] = 0;
2965 }
2966 if (isCopy != nullptr) *isCopy = JNI_TRUE;
2967 }
2968 HOTSPOT_JNI_GETSTRINGCRITICAL_RETURN((uint16_t *) ret);
2969 return ret;
2970 JNI_END
2971
2972
2973 JNI_ENTRY(void, jni_ReleaseStringCritical(JNIEnv *env, jstring str, const jchar *chars))
2974 HOTSPOT_JNI_RELEASESTRINGCRITICAL_ENTRY(env, str, (uint16_t *) chars);
2975 oop s = JNIHandles::resolve_non_null(str);
2976 bool is_latin1 = java_lang_String::is_latin1(s);
2977
2978 if (is_latin1) {
2979 // For latin1 string, free jchar array allocated by earlier call to GetStringCritical.
2980 // This assumes that ReleaseStringCritical bookends GetStringCritical.
2981 FREE_C_HEAP_ARRAY(jchar, chars);
2982 } else {
2983 // StringDedup can have replaced the value array, so don't fetch the array from 's'.
2984 // Instead, we calculate the address based on the jchar array exposed with GetStringCritical.
2985 oop value = cast_to_oop((address)chars - arrayOopDesc::base_offset_in_bytes(T_CHAR));
2986
2987 // Unpin value array
2988 Universe::heap()->unpin_object(thread, value);
2989 }
2990 HOTSPOT_JNI_RELEASESTRINGCRITICAL_RETURN();
2991 JNI_END
2992
2993
2994 JNI_ENTRY(jweak, jni_NewWeakGlobalRef(JNIEnv *env, jobject ref))
2995 HOTSPOT_JNI_NEWWEAKGLOBALREF_ENTRY(env, ref);
2996 Handle ref_handle(thread, JNIHandles::resolve(ref));
2997 jweak ret = JNIHandles::make_weak_global(ref_handle, AllocFailStrategy::RETURN_NULL);
2998 if (ret == nullptr) {
2999 THROW_OOP_(Universe::out_of_memory_error_c_heap(), nullptr);
3000 }
3001 HOTSPOT_JNI_NEWWEAKGLOBALREF_RETURN(ret);
3002 return ret;
3003 JNI_END
3004
3005 // Must be JNI_ENTRY (with HandleMark)
3006 JNI_ENTRY(void, jni_DeleteWeakGlobalRef(JNIEnv *env, jweak ref))
3007 HOTSPOT_JNI_DELETEWEAKGLOBALREF_ENTRY(env, ref);
3008 JNIHandles::destroy_weak_global(ref);
3009 HOTSPOT_JNI_DELETEWEAKGLOBALREF_RETURN();
3010 JNI_END
3011
3012
3013 JNI_ENTRY_NO_PRESERVE(jboolean, jni_ExceptionCheck(JNIEnv *env))
3014 HOTSPOT_JNI_EXCEPTIONCHECK_ENTRY(env);
3015 jni_check_async_exceptions(thread);
3016 jboolean ret = (thread->has_pending_exception()) ? JNI_TRUE : JNI_FALSE;
3017 HOTSPOT_JNI_EXCEPTIONCHECK_RETURN(ret);
3018 return ret;
3019 JNI_END
3020
3021
3022 // Initialization state for three routines below relating to
3023 // java.nio.DirectBuffers
3024 static int directBufferSupportInitializeStarted = 0;
3025 static volatile int directBufferSupportInitializeEnded = 0;
3026 static volatile int directBufferSupportInitializeFailed = 0;
3027 static jclass bufferClass = nullptr;
3028 static jclass directBufferClass = nullptr;
3029 static jclass directByteBufferClass = nullptr;
3030 static jmethodID directByteBufferConstructor = nullptr;
3031 static jfieldID directBufferAddressField = nullptr;
3032 static jfieldID bufferCapacityField = nullptr;
3033
3034 static jclass lookupOne(JNIEnv* env, const char* name, TRAPS) {
3035 Handle loader; // null (bootstrap) loader
3036 Handle protection_domain; // null protection domain
3037
3038 TempNewSymbol sym = SymbolTable::new_symbol(name);
3039 jclass result = find_class_from_class_loader(env, sym, true, loader, protection_domain, true, CHECK_NULL);
3040
3041 if (log_is_enabled(Debug, class, resolve) && result != nullptr) {
3042 trace_class_resolution(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(result)));
3043 }
3044 return result;
3045 }
3046
3047 // These lookups are done with the null (bootstrap) ClassLoader to
3048 // circumvent any security checks that would be done by jni_FindClass.
3049 JNI_ENTRY(bool, lookupDirectBufferClasses(JNIEnv* env))
3050 {
3051 if ((bufferClass = lookupOne(env, "java/nio/Buffer", thread)) == nullptr) { return false; }
3052 if ((directBufferClass = lookupOne(env, "sun/nio/ch/DirectBuffer", thread)) == nullptr) { return false; }
3053 if ((directByteBufferClass = lookupOne(env, "java/nio/DirectByteBuffer", thread)) == nullptr) { return false; }
3054 return true;
3055 }
3056 JNI_END
3057
3058
3059 static bool initializeDirectBufferSupport(JNIEnv* env, JavaThread* thread) {
3060 if (directBufferSupportInitializeFailed) {
3061 return false;
3062 }
3063
3064 if (Atomic::cmpxchg(&directBufferSupportInitializeStarted, 0, 1) == 0) {
3065 if (!lookupDirectBufferClasses(env)) {
3066 directBufferSupportInitializeFailed = 1;
3067 return false;
3068 }
3069
3070 // Make global references for these
3071 bufferClass = (jclass) env->NewGlobalRef(bufferClass);
3072 directBufferClass = (jclass) env->NewGlobalRef(directBufferClass);
3073 directByteBufferClass = (jclass) env->NewGlobalRef(directByteBufferClass);
3074
3075 // Global refs will be null if out-of-memory (no exception is pending)
3076 if (bufferClass == nullptr || directBufferClass == nullptr || directByteBufferClass == nullptr) {
3077 directBufferSupportInitializeFailed = 1;
3078 return false;
3079 }
3080
3081 // Get needed field and method IDs
3082 directByteBufferConstructor = env->GetMethodID(directByteBufferClass, "<init>", "(JJ)V");
3083 if (env->ExceptionCheck()) {
3084 env->ExceptionClear();
3085 directBufferSupportInitializeFailed = 1;
3086 return false;
3087 }
3088 directBufferAddressField = env->GetFieldID(bufferClass, "address", "J");
3089 if (env->ExceptionCheck()) {
3090 env->ExceptionClear();
3091 directBufferSupportInitializeFailed = 1;
3092 return false;
3093 }
3094 bufferCapacityField = env->GetFieldID(bufferClass, "capacity", "I");
3095 if (env->ExceptionCheck()) {
3096 env->ExceptionClear();
3097 directBufferSupportInitializeFailed = 1;
3098 return false;
3099 }
3100
3101 if ((directByteBufferConstructor == nullptr) ||
3102 (directBufferAddressField == nullptr) ||
3103 (bufferCapacityField == nullptr)) {
3104 directBufferSupportInitializeFailed = 1;
3105 return false;
3106 }
3107
3108 directBufferSupportInitializeEnded = 1;
3109 } else {
3110 while (!directBufferSupportInitializeEnded && !directBufferSupportInitializeFailed) {
3111 os::naked_yield();
3112 }
3113 }
3114
3115 return !directBufferSupportInitializeFailed;
3116 }
3117
3118 extern "C" jobject JNICALL jni_NewDirectByteBuffer(JNIEnv *env, void* address, jlong capacity)
3119 {
3120 // thread_from_jni_environment() will block if VM is gone.
3121 JavaThread* thread = JavaThread::thread_from_jni_environment(env);
3122
3123 HOTSPOT_JNI_NEWDIRECTBYTEBUFFER_ENTRY(env, address, capacity);
3124
3125 if (!directBufferSupportInitializeEnded) {
3126 if (!initializeDirectBufferSupport(env, thread)) {
3127 HOTSPOT_JNI_NEWDIRECTBYTEBUFFER_RETURN(nullptr);
3128 return nullptr;
3129 }
3130 }
3131
3132 // Being paranoid about accidental sign extension on address
3133 jlong addr = (jlong) ((uintptr_t) address);
3134 jobject ret = env->NewObject(directByteBufferClass, directByteBufferConstructor, addr, capacity);
3135 HOTSPOT_JNI_NEWDIRECTBYTEBUFFER_RETURN(ret);
3136 return ret;
3137 }
3138
3139 DT_RETURN_MARK_DECL(GetDirectBufferAddress, void*
3140 , HOTSPOT_JNI_GETDIRECTBUFFERADDRESS_RETURN((void*) _ret_ref));
3141
3142 extern "C" void* JNICALL jni_GetDirectBufferAddress(JNIEnv *env, jobject buf)
3143 {
3144 // thread_from_jni_environment() will block if VM is gone.
3145 JavaThread* thread = JavaThread::thread_from_jni_environment(env);
3146
3147 HOTSPOT_JNI_GETDIRECTBUFFERADDRESS_ENTRY(env, buf);
3148 void* ret = nullptr;
3149 DT_RETURN_MARK(GetDirectBufferAddress, void*, (const void*&)ret);
3150
3151 if (!directBufferSupportInitializeEnded) {
3152 if (!initializeDirectBufferSupport(env, thread)) {
3153 return 0;
3154 }
3155 }
3156
3157 if ((buf != nullptr) && (!env->IsInstanceOf(buf, directBufferClass))) {
3158 return 0;
3159 }
3160
3161 ret = (void*)(intptr_t)env->GetLongField(buf, directBufferAddressField);
3162 return ret;
3163 }
3164
3165 DT_RETURN_MARK_DECL(GetDirectBufferCapacity, jlong
3166 , HOTSPOT_JNI_GETDIRECTBUFFERCAPACITY_RETURN(_ret_ref));
3167
3168 extern "C" jlong JNICALL jni_GetDirectBufferCapacity(JNIEnv *env, jobject buf)
3169 {
3170 // thread_from_jni_environment() will block if VM is gone.
3171 JavaThread* thread = JavaThread::thread_from_jni_environment(env);
3172
3173 HOTSPOT_JNI_GETDIRECTBUFFERCAPACITY_ENTRY(env, buf);
3174 jlong ret = -1;
3175 DT_RETURN_MARK(GetDirectBufferCapacity, jlong, (const jlong&)ret);
3176
3177 if (!directBufferSupportInitializeEnded) {
3178 if (!initializeDirectBufferSupport(env, thread)) {
3179 ret = 0;
3180 return ret;
3181 }
3182 }
3183
3184 if (buf == nullptr) {
3185 return -1;
3186 }
3187
3188 if (!env->IsInstanceOf(buf, directBufferClass)) {
3189 return -1;
3190 }
3191
3192 // NOTE that capacity is currently an int in the implementation
3193 ret = env->GetIntField(buf, bufferCapacityField);
3194 return ret;
3195 }
3196
3197
3198 JNI_LEAF(jint, jni_GetVersion(JNIEnv *env))
3199 HOTSPOT_JNI_GETVERSION_ENTRY(env);
3200 HOTSPOT_JNI_GETVERSION_RETURN(CurrentVersion);
3201 return CurrentVersion;
3202 JNI_END
3203
3204 extern struct JavaVM_ main_vm;
3205
3206 JNI_LEAF(jint, jni_GetJavaVM(JNIEnv *env, JavaVM **vm))
3207 HOTSPOT_JNI_GETJAVAVM_ENTRY(env, (void **) vm);
3208 *vm = (JavaVM *)(&main_vm);
3209 HOTSPOT_JNI_GETJAVAVM_RETURN(JNI_OK);
3210 return JNI_OK;
3211 JNI_END
3212
3213
3214 JNI_ENTRY(jobject, jni_GetModule(JNIEnv* env, jclass clazz))
3215 return Modules::get_module(clazz, THREAD);
3216 JNI_END
3217
3218 JNI_ENTRY(jboolean, jni_IsVirtualThread(JNIEnv* env, jobject obj))
3219 oop thread_obj = JNIHandles::resolve_external_guard(obj);
3220 if (thread_obj != nullptr && thread_obj->is_a(vmClasses::BaseVirtualThread_klass())) {
3221 return JNI_TRUE;
3222 } else {
3223 return JNI_FALSE;
3224 }
3225 JNI_END
3226
3227
3228 // Structure containing all jni functions
3229 struct JNINativeInterface_ jni_NativeInterface = {
3230 nullptr,
3231 nullptr,
3232 nullptr,
3233
3234 nullptr,
3235
3236 jni_GetVersion,
3237
3238 jni_DefineClass,
3239 jni_FindClass,
3240
3241 jni_FromReflectedMethod,
3242 jni_FromReflectedField,
3243
3244 jni_ToReflectedMethod,
3245
3246 jni_GetSuperclass,
3247 jni_IsAssignableFrom,
3248
3249 jni_ToReflectedField,
3250
3251 jni_Throw,
3252 jni_ThrowNew,
3253 jni_ExceptionOccurred,
3254 jni_ExceptionDescribe,
3255 jni_ExceptionClear,
3256 jni_FatalError,
3257
3258 jni_PushLocalFrame,
3259 jni_PopLocalFrame,
3260
3261 jni_NewGlobalRef,
3262 jni_DeleteGlobalRef,
3263 jni_DeleteLocalRef,
3264 jni_IsSameObject,
3265
3266 jni_NewLocalRef,
3267 jni_EnsureLocalCapacity,
3268
3269 jni_AllocObject,
3270 jni_NewObject,
3271 jni_NewObjectV,
3272 jni_NewObjectA,
3273
3274 jni_GetObjectClass,
3275 jni_IsInstanceOf,
3276
3277 jni_GetMethodID,
3278
3279 jni_CallObjectMethod,
3280 jni_CallObjectMethodV,
3281 jni_CallObjectMethodA,
3282 jni_CallBooleanMethod,
3283 jni_CallBooleanMethodV,
3284 jni_CallBooleanMethodA,
3285 jni_CallByteMethod,
3286 jni_CallByteMethodV,
3287 jni_CallByteMethodA,
3288 jni_CallCharMethod,
3289 jni_CallCharMethodV,
3290 jni_CallCharMethodA,
3291 jni_CallShortMethod,
3292 jni_CallShortMethodV,
3293 jni_CallShortMethodA,
3294 jni_CallIntMethod,
3295 jni_CallIntMethodV,
3296 jni_CallIntMethodA,
3297 jni_CallLongMethod,
3298 jni_CallLongMethodV,
3299 jni_CallLongMethodA,
3300 jni_CallFloatMethod,
3301 jni_CallFloatMethodV,
3302 jni_CallFloatMethodA,
3303 jni_CallDoubleMethod,
3304 jni_CallDoubleMethodV,
3305 jni_CallDoubleMethodA,
3306 jni_CallVoidMethod,
3307 jni_CallVoidMethodV,
3308 jni_CallVoidMethodA,
3309
3310 jni_CallNonvirtualObjectMethod,
3311 jni_CallNonvirtualObjectMethodV,
3312 jni_CallNonvirtualObjectMethodA,
3313 jni_CallNonvirtualBooleanMethod,
3314 jni_CallNonvirtualBooleanMethodV,
3315 jni_CallNonvirtualBooleanMethodA,
3316 jni_CallNonvirtualByteMethod,
3317 jni_CallNonvirtualByteMethodV,
3318 jni_CallNonvirtualByteMethodA,
3319 jni_CallNonvirtualCharMethod,
3320 jni_CallNonvirtualCharMethodV,
3321 jni_CallNonvirtualCharMethodA,
3322 jni_CallNonvirtualShortMethod,
3323 jni_CallNonvirtualShortMethodV,
3324 jni_CallNonvirtualShortMethodA,
3325 jni_CallNonvirtualIntMethod,
3326 jni_CallNonvirtualIntMethodV,
3327 jni_CallNonvirtualIntMethodA,
3328 jni_CallNonvirtualLongMethod,
3329 jni_CallNonvirtualLongMethodV,
3330 jni_CallNonvirtualLongMethodA,
3331 jni_CallNonvirtualFloatMethod,
3332 jni_CallNonvirtualFloatMethodV,
3333 jni_CallNonvirtualFloatMethodA,
3334 jni_CallNonvirtualDoubleMethod,
3335 jni_CallNonvirtualDoubleMethodV,
3336 jni_CallNonvirtualDoubleMethodA,
3337 jni_CallNonvirtualVoidMethod,
3338 jni_CallNonvirtualVoidMethodV,
3339 jni_CallNonvirtualVoidMethodA,
3340
3341 jni_GetFieldID,
3342
3343 jni_GetObjectField,
3344 jni_GetBooleanField,
3345 jni_GetByteField,
3346 jni_GetCharField,
3347 jni_GetShortField,
3348 jni_GetIntField,
3349 jni_GetLongField,
3350 jni_GetFloatField,
3351 jni_GetDoubleField,
3352
3353 jni_SetObjectField,
3354 jni_SetBooleanField,
3355 jni_SetByteField,
3356 jni_SetCharField,
3357 jni_SetShortField,
3358 jni_SetIntField,
3359 jni_SetLongField,
3360 jni_SetFloatField,
3361 jni_SetDoubleField,
3362
3363 jni_GetStaticMethodID,
3364
3365 jni_CallStaticObjectMethod,
3366 jni_CallStaticObjectMethodV,
3367 jni_CallStaticObjectMethodA,
3368 jni_CallStaticBooleanMethod,
3369 jni_CallStaticBooleanMethodV,
3370 jni_CallStaticBooleanMethodA,
3371 jni_CallStaticByteMethod,
3372 jni_CallStaticByteMethodV,
3373 jni_CallStaticByteMethodA,
3374 jni_CallStaticCharMethod,
3375 jni_CallStaticCharMethodV,
3376 jni_CallStaticCharMethodA,
3377 jni_CallStaticShortMethod,
3378 jni_CallStaticShortMethodV,
3379 jni_CallStaticShortMethodA,
3380 jni_CallStaticIntMethod,
3381 jni_CallStaticIntMethodV,
3382 jni_CallStaticIntMethodA,
3383 jni_CallStaticLongMethod,
3384 jni_CallStaticLongMethodV,
3385 jni_CallStaticLongMethodA,
3386 jni_CallStaticFloatMethod,
3387 jni_CallStaticFloatMethodV,
3388 jni_CallStaticFloatMethodA,
3389 jni_CallStaticDoubleMethod,
3390 jni_CallStaticDoubleMethodV,
3391 jni_CallStaticDoubleMethodA,
3392 jni_CallStaticVoidMethod,
3393 jni_CallStaticVoidMethodV,
3394 jni_CallStaticVoidMethodA,
3395
3396 jni_GetStaticFieldID,
3397
3398 jni_GetStaticObjectField,
3399 jni_GetStaticBooleanField,
3400 jni_GetStaticByteField,
3401 jni_GetStaticCharField,
3402 jni_GetStaticShortField,
3403 jni_GetStaticIntField,
3404 jni_GetStaticLongField,
3405 jni_GetStaticFloatField,
3406 jni_GetStaticDoubleField,
3407
3408 jni_SetStaticObjectField,
3409 jni_SetStaticBooleanField,
3410 jni_SetStaticByteField,
3411 jni_SetStaticCharField,
3412 jni_SetStaticShortField,
3413 jni_SetStaticIntField,
3414 jni_SetStaticLongField,
3415 jni_SetStaticFloatField,
3416 jni_SetStaticDoubleField,
3417
3418 jni_NewString,
3419 jni_GetStringLength,
3420 jni_GetStringChars,
3421 jni_ReleaseStringChars,
3422
3423 jni_NewStringUTF,
3424 jni_GetStringUTFLength,
3425 jni_GetStringUTFChars,
3426 jni_ReleaseStringUTFChars,
3427
3428 jni_GetArrayLength,
3429
3430 jni_NewObjectArray,
3431 jni_GetObjectArrayElement,
3432 jni_SetObjectArrayElement,
3433
3434 jni_NewBooleanArray,
3435 jni_NewByteArray,
3436 jni_NewCharArray,
3437 jni_NewShortArray,
3438 jni_NewIntArray,
3439 jni_NewLongArray,
3440 jni_NewFloatArray,
3441 jni_NewDoubleArray,
3442
3443 jni_GetBooleanArrayElements,
3444 jni_GetByteArrayElements,
3445 jni_GetCharArrayElements,
3446 jni_GetShortArrayElements,
3447 jni_GetIntArrayElements,
3448 jni_GetLongArrayElements,
3449 jni_GetFloatArrayElements,
3450 jni_GetDoubleArrayElements,
3451
3452 jni_ReleaseBooleanArrayElements,
3453 jni_ReleaseByteArrayElements,
3454 jni_ReleaseCharArrayElements,
3455 jni_ReleaseShortArrayElements,
3456 jni_ReleaseIntArrayElements,
3457 jni_ReleaseLongArrayElements,
3458 jni_ReleaseFloatArrayElements,
3459 jni_ReleaseDoubleArrayElements,
3460
3461 jni_GetBooleanArrayRegion,
3462 jni_GetByteArrayRegion,
3463 jni_GetCharArrayRegion,
3464 jni_GetShortArrayRegion,
3465 jni_GetIntArrayRegion,
3466 jni_GetLongArrayRegion,
3467 jni_GetFloatArrayRegion,
3468 jni_GetDoubleArrayRegion,
3469
3470 jni_SetBooleanArrayRegion,
3471 jni_SetByteArrayRegion,
3472 jni_SetCharArrayRegion,
3473 jni_SetShortArrayRegion,
3474 jni_SetIntArrayRegion,
3475 jni_SetLongArrayRegion,
3476 jni_SetFloatArrayRegion,
3477 jni_SetDoubleArrayRegion,
3478
3479 jni_RegisterNatives,
3480 jni_UnregisterNatives,
3481
3482 jni_MonitorEnter,
3483 jni_MonitorExit,
3484
3485 jni_GetJavaVM,
3486
3487 jni_GetStringRegion,
3488 jni_GetStringUTFRegion,
3489
3490 jni_GetPrimitiveArrayCritical,
3491 jni_ReleasePrimitiveArrayCritical,
3492
3493 jni_GetStringCritical,
3494 jni_ReleaseStringCritical,
3495
3496 jni_NewWeakGlobalRef,
3497 jni_DeleteWeakGlobalRef,
3498
3499 jni_ExceptionCheck,
3500
3501 jni_NewDirectByteBuffer,
3502 jni_GetDirectBufferAddress,
3503 jni_GetDirectBufferCapacity,
3504
3505 // New 1_6 features
3506
3507 jni_GetObjectRefType,
3508
3509 // Module features
3510
3511 jni_GetModule,
3512
3513 // Virtual threads
3514
3515 jni_IsVirtualThread
3516 };
3517
3518
3519 // For jvmti use to modify jni function table.
3520 // Java threads in native contiues to run until it is transitioned
3521 // to VM at safepoint. Before the transition or before it is blocked
3522 // for safepoint it may access jni function table. VM could crash if
3523 // any java thread access the jni function table in the middle of memcpy.
3524 // To avoid this each function pointers are copied automically.
3525 void copy_jni_function_table(const struct JNINativeInterface_ *new_jni_NativeInterface) {
3526 assert(SafepointSynchronize::is_at_safepoint(), "must be at safepoint");
3527 intptr_t *a = (intptr_t *) jni_functions();
3528 intptr_t *b = (intptr_t *) new_jni_NativeInterface;
3529 for (uint i=0; i < sizeof(struct JNINativeInterface_)/sizeof(void *); i++) {
3530 Atomic::store(a++, *b++);
3531 }
3532 }
3533
3534 void quicken_jni_functions() {
3535 // Replace Get<Primitive>Field with fast versions
3536 if (UseFastJNIAccessors && !VerifyJNIFields && !CheckJNICalls) {
3537 address func;
3538 func = JNI_FastGetField::generate_fast_get_boolean_field();
3539 if (func != (address)-1) {
3540 jni_NativeInterface.GetBooleanField = (GetBooleanField_t)func;
3541 }
3542 func = JNI_FastGetField::generate_fast_get_byte_field();
3543 if (func != (address)-1) {
3544 jni_NativeInterface.GetByteField = (GetByteField_t)func;
3545 }
3546 func = JNI_FastGetField::generate_fast_get_char_field();
3547 if (func != (address)-1) {
3548 jni_NativeInterface.GetCharField = (GetCharField_t)func;
3549 }
3550 func = JNI_FastGetField::generate_fast_get_short_field();
3551 if (func != (address)-1) {
3552 jni_NativeInterface.GetShortField = (GetShortField_t)func;
3553 }
3554 func = JNI_FastGetField::generate_fast_get_int_field();
3555 if (func != (address)-1) {
3556 jni_NativeInterface.GetIntField = (GetIntField_t)func;
3557 }
3558 func = JNI_FastGetField::generate_fast_get_long_field();
3559 if (func != (address)-1) {
3560 jni_NativeInterface.GetLongField = (GetLongField_t)func;
3561 }
3562 func = JNI_FastGetField::generate_fast_get_float_field();
3563 if (func != (address)-1) {
3564 jni_NativeInterface.GetFloatField = (GetFloatField_t)func;
3565 }
3566 func = JNI_FastGetField::generate_fast_get_double_field();
3567 if (func != (address)-1) {
3568 jni_NativeInterface.GetDoubleField = (GetDoubleField_t)func;
3569 }
3570 }
3571 }
3572
3573 // Returns the function structure
3574 struct JNINativeInterface_* jni_functions() {
3575 #if INCLUDE_JNI_CHECK
3576 if (CheckJNICalls) return jni_functions_check();
3577 #endif // INCLUDE_JNI_CHECK
3578 return &jni_NativeInterface;
3579 }
3580
3581 // Returns the function structure
3582 struct JNINativeInterface_* jni_functions_nocheck() {
3583 return &jni_NativeInterface;
3584 }
3585
3586
3587 // Invocation API
3588
3589
3590 // Forward declaration
3591 extern const struct JNIInvokeInterface_ jni_InvokeInterface;
3592
3593 // Global invocation API vars
3594 enum VM_Creation_State {
3595 NOT_CREATED = 0,
3596 IN_PROGRESS, // Most JNI operations are permitted during this phase to
3597 // allow for initialization actions by libraries and agents.
3598 COMPLETE
3599 };
3600
3601 volatile VM_Creation_State vm_created = NOT_CREATED;
3602
3603 // Indicate whether it is safe to recreate VM. Recreation is only
3604 // possible after a failed initial creation attempt in some cases.
3605 volatile int safe_to_recreate_vm = 1;
3606 struct JavaVM_ main_vm = {&jni_InvokeInterface};
3607
3608
3609 #define JAVASTACKSIZE (400 * 1024) /* Default size of a thread java stack */
3610 enum { VERIFY_NONE, VERIFY_REMOTE, VERIFY_ALL };
3611
3612 DT_RETURN_MARK_DECL(GetDefaultJavaVMInitArgs, jint
3613 , HOTSPOT_JNI_GETDEFAULTJAVAVMINITARGS_RETURN(_ret_ref));
3614
3615 _JNI_IMPORT_OR_EXPORT_ jint JNICALL JNI_GetDefaultJavaVMInitArgs(void *args_) {
3616 HOTSPOT_JNI_GETDEFAULTJAVAVMINITARGS_ENTRY(args_);
3617 JDK1_1InitArgs *args = (JDK1_1InitArgs *)args_;
3618 jint ret = JNI_ERR;
3619 DT_RETURN_MARK(GetDefaultJavaVMInitArgs, jint, (const jint&)ret);
3620
3621 if (Threads::is_supported_jni_version(args->version)) {
3622 ret = JNI_OK;
3623 }
3624 // 1.1 style no longer supported in hotspot.
3625 // According the JNI spec, we should update args->version on return.
3626 // We also use the structure to communicate with launcher about default
3627 // stack size.
3628 if (args->version == JNI_VERSION_1_1) {
3629 args->version = JNI_VERSION_1_2;
3630 // javaStackSize is int in arguments structure
3631 assert(jlong(ThreadStackSize) * K < INT_MAX, "integer overflow");
3632 args->javaStackSize = (jint)(ThreadStackSize * K);
3633 }
3634 return ret;
3635 }
3636
3637 DT_RETURN_MARK_DECL(CreateJavaVM, jint
3638 , HOTSPOT_JNI_CREATEJAVAVM_RETURN(_ret_ref));
3639
3640 static jint JNI_CreateJavaVM_inner(JavaVM **vm, void **penv, void *args) {
3641 HOTSPOT_JNI_CREATEJAVAVM_ENTRY((void **) vm, penv, args);
3642
3643 jint result = JNI_ERR;
3644 DT_RETURN_MARK(CreateJavaVM, jint, (const jint&)result);
3645
3646 // We're about to use Atomic::xchg for synchronization. Some Zero
3647 // platforms use the GCC builtin __sync_lock_test_and_set for this,
3648 // but __sync_lock_test_and_set is not guaranteed to do what we want
3649 // on all architectures. So we check it works before relying on it.
3650 #if defined(ZERO) && defined(ASSERT)
3651 {
3652 jint a = 0xcafebabe;
3653 jint b = Atomic::xchg(&a, (jint) 0xdeadbeef);
3654 void *c = &a;
3655 void *d = Atomic::xchg(&c, &b);
3656 assert(a == (jint) 0xdeadbeef && b == (jint) 0xcafebabe, "Atomic::xchg() works");
3657 assert(c == &b && d == &a, "Atomic::xchg() works");
3658 }
3659 #endif // ZERO && ASSERT
3660
3661 // At the moment it's only possible to have one Java VM,
3662 // since some of the runtime state is in global variables.
3663
3664 // We cannot use our mutex locks here, since they only work on
3665 // Threads. We do an atomic compare and exchange to ensure only
3666 // one thread can call this method at a time
3667
3668 // We use Atomic::xchg rather than Atomic::add/dec since on some platforms
3669 // the add/dec implementations are dependent on whether we are running
3670 // on a multiprocessor Atomic::xchg does not have this problem.
3671 if (Atomic::xchg(&vm_created, IN_PROGRESS) != NOT_CREATED) {
3672 return JNI_EEXIST; // already created, or create attempt in progress
3673 }
3674
3675 // If a previous creation attempt failed but can be retried safely,
3676 // then safe_to_recreate_vm will have been reset to 1 after being
3677 // cleared here. If a previous creation attempt succeeded and we then
3678 // destroyed that VM, we will be prevented from trying to recreate
3679 // the VM in the same process, as the value will still be 0.
3680 if (Atomic::xchg(&safe_to_recreate_vm, 0) == 0) {
3681 return JNI_ERR;
3682 }
3683
3684 /**
3685 * Certain errors during initialization are recoverable and do not
3686 * prevent this method from being called again at a later time
3687 * (perhaps with different arguments). However, at a certain
3688 * point during initialization if an error occurs we cannot allow
3689 * this function to be called again (or it will crash). In those
3690 * situations, the 'canTryAgain' flag is set to false, which atomically
3691 * sets safe_to_recreate_vm to 1, such that any new call to
3692 * JNI_CreateJavaVM will immediately fail using the above logic.
3693 */
3694 bool can_try_again = true;
3695
3696 result = Threads::create_vm((JavaVMInitArgs*) args, &can_try_again);
3697 if (result == JNI_OK) {
3698 JavaThread *thread = JavaThread::current();
3699 assert(!thread->has_pending_exception(), "should have returned not OK");
3700 // thread is thread_in_vm here
3701 *vm = (JavaVM *)(&main_vm);
3702 *(JNIEnv**)penv = thread->jni_environment();
3703 // mark creation complete for other JNI ops
3704 Atomic::release_store(&vm_created, COMPLETE);
3705
3706 #if INCLUDE_JVMCI
3707 if (EnableJVMCI) {
3708 if (UseJVMCICompiler) {
3709 // JVMCI is initialized on a CompilerThread
3710 if (BootstrapJVMCI) {
3711 JavaThread* THREAD = thread; // For exception macros.
3712 JVMCICompiler* compiler = JVMCICompiler::instance(true, CATCH);
3713 compiler->bootstrap(THREAD);
3714 if (HAS_PENDING_EXCEPTION) {
3715 HandleMark hm(THREAD);
3716 vm_exit_during_initialization(Handle(THREAD, PENDING_EXCEPTION));
3717 }
3718 }
3719 }
3720 }
3721 #endif
3722
3723 // Notify JVMTI
3724 if (JvmtiExport::should_post_thread_life()) {
3725 JvmtiExport::post_thread_start(thread);
3726 }
3727
3728 JFR_ONLY(Jfr::on_thread_start(thread);)
3729
3730 if (ReplayCompiles) ciReplay::replay(thread);
3731
3732 #ifdef ASSERT
3733 // Some platforms (like Win*) need a wrapper around these test
3734 // functions in order to properly handle error conditions.
3735 if (ErrorHandlerTest != 0) {
3736 VMError::controlled_crash(ErrorHandlerTest);
3737 }
3738 #endif
3739
3740 // Since this is not a JVM_ENTRY we have to set the thread state manually before leaving.
3741 ThreadStateTransition::transition_from_vm(thread, _thread_in_native);
3742 MACOS_AARCH64_ONLY(thread->enable_wx(WXExec));
3743 } else {
3744 // If create_vm exits because of a pending exception, exit with that
3745 // exception. In the future when we figure out how to reclaim memory,
3746 // we may be able to exit with JNI_ERR and allow the calling application
3747 // to continue.
3748 if (Universe::is_fully_initialized()) {
3749 // otherwise no pending exception possible - VM will already have aborted
3750 Thread* current = Thread::current_or_null();
3751 if (current != nullptr) {
3752 JavaThread* THREAD = JavaThread::cast(current); // For exception macros.
3753 assert(HAS_PENDING_EXCEPTION, "must be - else no current thread exists");
3754 HandleMark hm(THREAD);
3755 vm_exit_during_initialization(Handle(THREAD, PENDING_EXCEPTION));
3756 }
3757 }
3758
3759 if (can_try_again) {
3760 // reset safe_to_recreate_vm to 1 so that retrial would be possible
3761 safe_to_recreate_vm = 1;
3762 }
3763
3764 // Creation failed. We must reset vm_created
3765 *vm = 0;
3766 *(JNIEnv**)penv = 0;
3767 // reset vm_created last to avoid race condition. Use OrderAccess to
3768 // control both compiler and architectural-based reordering.
3769 assert(vm_created == IN_PROGRESS, "must be");
3770 Atomic::release_store(&vm_created, NOT_CREATED);
3771 }
3772
3773 // Flush stdout and stderr before exit.
3774 fflush(stdout);
3775 fflush(stderr);
3776
3777 return result;
3778
3779 }
3780
3781 _JNI_IMPORT_OR_EXPORT_ jint JNICALL JNI_CreateJavaVM(JavaVM **vm, void **penv, void *args) {
3782 jint result = JNI_ERR;
3783 // On Windows, let CreateJavaVM run with SEH protection
3784 #if defined(_WIN32) && !defined(USE_VECTORED_EXCEPTION_HANDLING)
3785 __try {
3786 #endif
3787 result = JNI_CreateJavaVM_inner(vm, penv, args);
3788 #if defined(_WIN32) && !defined(USE_VECTORED_EXCEPTION_HANDLING)
3789 } __except(topLevelExceptionFilter((_EXCEPTION_POINTERS*)_exception_info())) {
3790 // Nothing to do.
3791 }
3792 #endif
3793 return result;
3794 }
3795
3796 _JNI_IMPORT_OR_EXPORT_ jint JNICALL JNI_GetCreatedJavaVMs(JavaVM **vm_buf, jsize bufLen, jsize *numVMs) {
3797 HOTSPOT_JNI_GETCREATEDJAVAVMS_ENTRY((void **) vm_buf, bufLen, (uintptr_t *) numVMs);
3798
3799 if (vm_created == COMPLETE) {
3800 if (numVMs != nullptr) *numVMs = 1;
3801 if (bufLen > 0) *vm_buf = (JavaVM *)(&main_vm);
3802 } else {
3803 if (numVMs != nullptr) *numVMs = 0;
3804 }
3805 HOTSPOT_JNI_GETCREATEDJAVAVMS_RETURN(JNI_OK);
3806 return JNI_OK;
3807 }
3808
3809 extern "C" {
3810
3811 DT_RETURN_MARK_DECL(DestroyJavaVM, jint
3812 , HOTSPOT_JNI_DESTROYJAVAVM_RETURN(_ret_ref));
3813
3814 static jint JNICALL jni_DestroyJavaVM_inner(JavaVM *vm) {
3815 HOTSPOT_JNI_DESTROYJAVAVM_ENTRY(vm);
3816 jint res = JNI_ERR;
3817 DT_RETURN_MARK(DestroyJavaVM, jint, (const jint&)res);
3818
3819 if (vm_created == NOT_CREATED) {
3820 res = JNI_ERR;
3821 return res;
3822 }
3823
3824 JNIEnv *env;
3825 JavaVMAttachArgs destroyargs;
3826 destroyargs.version = CurrentVersion;
3827 destroyargs.name = (char *)"DestroyJavaVM";
3828 destroyargs.group = nullptr;
3829 res = vm->AttachCurrentThread((void **)&env, (void *)&destroyargs);
3830 if (res != JNI_OK) {
3831 return res;
3832 }
3833
3834 JavaThread* thread = JavaThread::current();
3835
3836 // Make sure we are actually in a newly attached thread, with no
3837 // existing Java frame.
3838 if (thread->has_last_Java_frame()) {
3839 return JNI_ERR;
3840 }
3841
3842 // Since this is not a JVM_ENTRY we have to set the thread state manually before entering.
3843
3844 // We are going to VM, change W^X state to the expected one.
3845 MACOS_AARCH64_ONLY(WXMode oldmode = thread->enable_wx(WXWrite));
3846
3847 ThreadStateTransition::transition_from_native(thread, _thread_in_vm);
3848 Threads::destroy_vm();
3849 // Don't bother restoring thread state, VM is gone.
3850 vm_created = NOT_CREATED;
3851 return JNI_OK;
3852 }
3853
3854 jint JNICALL jni_DestroyJavaVM(JavaVM *vm) {
3855 jint result = JNI_ERR;
3856 // On Windows, we need SEH protection
3857 #if defined(_WIN32) && !defined(USE_VECTORED_EXCEPTION_HANDLING)
3858 __try {
3859 #endif
3860 result = jni_DestroyJavaVM_inner(vm);
3861 #if defined(_WIN32) && !defined(USE_VECTORED_EXCEPTION_HANDLING)
3862 } __except(topLevelExceptionFilter((_EXCEPTION_POINTERS*)_exception_info())) {
3863 // Nothing to do.
3864 }
3865 #endif
3866 return result;
3867 }
3868
3869 static jint attach_current_thread(JavaVM *vm, void **penv, void *_args, bool daemon) {
3870 JavaVMAttachArgs *args = (JavaVMAttachArgs *) _args;
3871
3872 // Check below commented out from JDK1.2fcs as well
3873 /*
3874 if (args && (args->version != JNI_VERSION_1_1 || args->version != JNI_VERSION_1_2)) {
3875 return JNI_EVERSION;
3876 }
3877 */
3878
3879 Thread* t = Thread::current_or_null();
3880 if (t != nullptr) {
3881 // If executing from an atexit hook we may be in the VMThread.
3882 if (t->is_Java_thread()) {
3883 // If the thread has been attached this operation is a no-op
3884 *(JNIEnv**)penv = JavaThread::cast(t)->jni_environment();
3885 return JNI_OK;
3886 } else {
3887 return JNI_ERR;
3888 }
3889 }
3890
3891 // Create a thread and mark it as attaching so it will be skipped by the
3892 // ThreadsListEnumerator - see CR 6404306
3893 JavaThread* thread = new JavaThread(true);
3894
3895 // Set correct safepoint info. The thread is going to call into Java when
3896 // initializing the Java level thread object. Hence, the correct state must
3897 // be set in order for the Safepoint code to deal with it correctly.
3898 thread->set_thread_state(_thread_in_vm);
3899 thread->record_stack_base_and_size();
3900 thread->register_thread_stack_with_NMT();
3901 thread->initialize_thread_current();
3902 MACOS_AARCH64_ONLY(thread->init_wx());
3903
3904 if (!os::create_attached_thread(thread)) {
3905 thread->smr_delete();
3906 return JNI_ERR;
3907 }
3908 // Enable stack overflow checks
3909 thread->stack_overflow_state()->create_stack_guard_pages();
3910
3911 thread->initialize_tlab();
3912
3913 thread->cache_global_variables();
3914
3915 // This thread will not do a safepoint check, since it has
3916 // not been added to the Thread list yet.
3917 { MutexLocker ml(Threads_lock);
3918 // This must be inside this lock in order to get FullGCALot to work properly, i.e., to
3919 // avoid this thread trying to do a GC before it is added to the thread-list
3920 thread->set_active_handles(JNIHandleBlock::allocate_block());
3921 Threads::add(thread, daemon);
3922 }
3923 // Create thread group and name info from attach arguments
3924 oop group = nullptr;
3925 char* thread_name = nullptr;
3926 if (args != nullptr && Threads::is_supported_jni_version(args->version)) {
3927 group = JNIHandles::resolve(args->group);
3928 thread_name = args->name; // may be null
3929 }
3930 if (group == nullptr) group = Universe::main_thread_group();
3931
3932 // Create Java level thread object and attach it to this thread
3933 bool attach_failed = false;
3934 {
3935 EXCEPTION_MARK;
3936 HandleMark hm(THREAD);
3937 Handle thread_group(THREAD, group);
3938 thread->allocate_threadObj(thread_group, thread_name, daemon, THREAD);
3939 if (HAS_PENDING_EXCEPTION) {
3940 CLEAR_PENDING_EXCEPTION;
3941 // cleanup outside the handle mark.
3942 attach_failed = true;
3943 }
3944 }
3945
3946 if (attach_failed) {
3947 // Added missing cleanup
3948 thread->cleanup_failed_attach_current_thread(daemon);
3949 return JNI_ERR;
3950 }
3951
3952 // mark the thread as no longer attaching
3953 // this uses a fence to push the change through so we don't have
3954 // to regrab the threads_lock
3955 thread->set_done_attaching_via_jni();
3956
3957 // Set java thread status.
3958 java_lang_Thread::set_thread_status(thread->threadObj(),
3959 JavaThreadStatus::RUNNABLE);
3960
3961 // Notify the debugger
3962 if (JvmtiExport::should_post_thread_life()) {
3963 JvmtiExport::post_thread_start(thread);
3964 }
3965
3966 JFR_ONLY(Jfr::on_thread_start(thread);)
3967
3968 *(JNIEnv**)penv = thread->jni_environment();
3969
3970 // Now leaving the VM, so change thread_state. This is normally automatically taken care
3971 // of in the JVM_ENTRY. But in this situation we have to do it manually.
3972 ThreadStateTransition::transition_from_vm(thread, _thread_in_native);
3973 MACOS_AARCH64_ONLY(thread->enable_wx(WXExec));
3974
3975 // Perform any platform dependent FPU setup
3976 os::setup_fpu();
3977
3978 return JNI_OK;
3979 }
3980
3981
3982 jint JNICALL jni_AttachCurrentThread(JavaVM *vm, void **penv, void *_args) {
3983 HOTSPOT_JNI_ATTACHCURRENTTHREAD_ENTRY(vm, penv, _args);
3984 if (vm_created == NOT_CREATED) {
3985 // Not sure how we could possibly get here.
3986 HOTSPOT_JNI_ATTACHCURRENTTHREAD_RETURN((uint32_t) JNI_ERR);
3987 return JNI_ERR;
3988 }
3989
3990 jint ret = attach_current_thread(vm, penv, _args, false);
3991 HOTSPOT_JNI_ATTACHCURRENTTHREAD_RETURN(ret);
3992 return ret;
3993 }
3994
3995
3996 jint JNICALL jni_DetachCurrentThread(JavaVM *vm) {
3997 HOTSPOT_JNI_DETACHCURRENTTHREAD_ENTRY(vm);
3998 if (vm_created == NOT_CREATED) {
3999 // Not sure how we could possibly get here.
4000 HOTSPOT_JNI_DETACHCURRENTTHREAD_RETURN(JNI_ERR);
4001 return JNI_ERR;
4002 }
4003
4004 Thread* current = Thread::current_or_null();
4005
4006 // If the thread has already been detached the operation is a no-op
4007 if (current == nullptr) {
4008 HOTSPOT_JNI_DETACHCURRENTTHREAD_RETURN(JNI_OK);
4009 return JNI_OK;
4010 }
4011
4012 // If executing from an atexit hook we may be in the VMThread.
4013 if (!current->is_Java_thread()) {
4014 HOTSPOT_JNI_DETACHCURRENTTHREAD_RETURN((uint32_t) JNI_ERR);
4015 return JNI_ERR;
4016 }
4017
4018 VM_Exit::block_if_vm_exited();
4019
4020 JavaThread* thread = JavaThread::cast(current);
4021 if (thread->has_last_Java_frame()) {
4022 HOTSPOT_JNI_DETACHCURRENTTHREAD_RETURN((uint32_t) JNI_ERR);
4023 // Can't detach a thread that's running java, that can't work.
4024 return JNI_ERR;
4025 }
4026
4027 // We are going to VM, change W^X state to the expected one.
4028 MACOS_AARCH64_ONLY(thread->enable_wx(WXWrite));
4029
4030 // Safepoint support. Have to do call-back to safepoint code, if in the
4031 // middle of a safepoint operation
4032 ThreadStateTransition::transition_from_native(thread, _thread_in_vm);
4033
4034 // XXX: Note that JavaThread::exit() call below removes the guards on the
4035 // stack pages set up via enable_stack_{red,yellow}_zone() calls
4036 // above in jni_AttachCurrentThread. Unfortunately, while the setting
4037 // of the guards is visible in jni_AttachCurrentThread above,
4038 // the removal of the guards is buried below in JavaThread::exit()
4039 // here. The abstraction should be more symmetrically either exposed
4040 // or hidden (e.g. it could probably be hidden in the same
4041 // (platform-dependent) methods where we do alternate stack
4042 // maintenance work?)
4043 thread->exit(false, JavaThread::jni_detach);
4044 thread->smr_delete();
4045
4046 // Go to the execute mode, the initial state of the thread on creation.
4047 // Use os interface as the thread is not a JavaThread anymore.
4048 MACOS_AARCH64_ONLY(os::current_thread_enable_wx(WXExec));
4049
4050 HOTSPOT_JNI_DETACHCURRENTTHREAD_RETURN(JNI_OK);
4051 return JNI_OK;
4052 }
4053
4054 DT_RETURN_MARK_DECL(GetEnv, jint
4055 , HOTSPOT_JNI_GETENV_RETURN(_ret_ref));
4056
4057 jint JNICALL jni_GetEnv(JavaVM *vm, void **penv, jint version) {
4058 HOTSPOT_JNI_GETENV_ENTRY(vm, penv, version);
4059 jint ret = JNI_ERR;
4060 DT_RETURN_MARK(GetEnv, jint, (const jint&)ret);
4061
4062 if (vm_created == NOT_CREATED) {
4063 *penv = nullptr;
4064 ret = JNI_EDETACHED;
4065 return ret;
4066 }
4067
4068 if (JniExportedInterface::GetExportedInterface(vm, penv, version, &ret)) {
4069 return ret;
4070 }
4071
4072 #ifndef JVMPI_VERSION_1
4073 // need these in order to be polite about older agents
4074 #define JVMPI_VERSION_1 ((jint)0x10000001)
4075 #define JVMPI_VERSION_1_1 ((jint)0x10000002)
4076 #define JVMPI_VERSION_1_2 ((jint)0x10000003)
4077 #endif // !JVMPI_VERSION_1
4078
4079 Thread* thread = Thread::current_or_null();
4080 if (thread != nullptr && thread->is_Java_thread()) {
4081 if (Threads::is_supported_jni_version_including_1_1(version)) {
4082 *(JNIEnv**)penv = JavaThread::cast(thread)->jni_environment();
4083 ret = JNI_OK;
4084 return ret;
4085
4086 } else if (version == JVMPI_VERSION_1 ||
4087 version == JVMPI_VERSION_1_1 ||
4088 version == JVMPI_VERSION_1_2) {
4089 tty->print_cr("ERROR: JVMPI, an experimental interface, is no longer supported.");
4090 tty->print_cr("Please use the supported interface: the JVM Tool Interface (JVM TI).");
4091 ret = JNI_EVERSION;
4092 return ret;
4093 } else if (JvmtiExport::is_jvmdi_version(version)) {
4094 tty->print_cr("FATAL ERROR: JVMDI is no longer supported.");
4095 tty->print_cr("Please use the supported interface: the JVM Tool Interface (JVM TI).");
4096 ret = JNI_EVERSION;
4097 return ret;
4098 } else {
4099 *penv = nullptr;
4100 ret = JNI_EVERSION;
4101 return ret;
4102 }
4103 } else {
4104 *penv = nullptr;
4105 ret = JNI_EDETACHED;
4106 return ret;
4107 }
4108 }
4109
4110
4111 jint JNICALL jni_AttachCurrentThreadAsDaemon(JavaVM *vm, void **penv, void *_args) {
4112 HOTSPOT_JNI_ATTACHCURRENTTHREADASDAEMON_ENTRY(vm, penv, _args);
4113 if (vm_created == NOT_CREATED) {
4114 // Not sure how we could possibly get here.
4115 HOTSPOT_JNI_ATTACHCURRENTTHREADASDAEMON_RETURN((uint32_t) JNI_ERR);
4116 return JNI_ERR;
4117 }
4118
4119 jint ret = attach_current_thread(vm, penv, _args, true);
4120 HOTSPOT_JNI_ATTACHCURRENTTHREADASDAEMON_RETURN(ret);
4121 return ret;
4122 }
4123
4124
4125 } // End extern "C"
4126
4127 const struct JNIInvokeInterface_ jni_InvokeInterface = {
4128 nullptr,
4129 nullptr,
4130 nullptr,
4131
4132 jni_DestroyJavaVM,
4133 jni_AttachCurrentThread,
4134 jni_DetachCurrentThread,
4135 jni_GetEnv,
4136 jni_AttachCurrentThreadAsDaemon
4137 };