1 /*
2 * Copyright (c) 1997, 2024, Oracle and/or its affiliates. All rights reserved.
3 * Copyright (c) 2012, 2024 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 "nmt/memTracker.hpp"
56 #include "oops/access.inline.hpp"
57 #include "oops/arrayOop.hpp"
58 #include "oops/flatArrayOop.inline.hpp"
59 #include "oops/inlineKlass.inline.hpp"
60 #include "oops/instanceKlass.inline.hpp"
61 #include "oops/instanceOop.hpp"
62 #include "oops/klass.inline.hpp"
63 #include "oops/markWord.hpp"
64 #include "oops/method.hpp"
65 #include "oops/objArrayKlass.hpp"
66 #include "oops/objArrayOop.inline.hpp"
67 #include "oops/oop.inline.hpp"
68 #include "oops/symbol.hpp"
69 #include "oops/typeArrayKlass.hpp"
70 #include "oops/typeArrayOop.inline.hpp"
71 #include "prims/jniCheck.hpp"
72 #include "prims/jniExport.hpp"
73 #include "prims/jniFastGetField.hpp"
74 #include "prims/jvm_misc.hpp"
75 #include "prims/jvmtiExport.hpp"
76 #include "prims/jvmtiThreadState.hpp"
77 #include "runtime/arguments.hpp"
78 #include "runtime/atomic.hpp"
79 #include "runtime/fieldDescriptor.inline.hpp"
80 #include "runtime/handles.inline.hpp"
81 #include "runtime/interfaceSupport.inline.hpp"
82 #include "runtime/java.hpp"
83 #include "runtime/javaCalls.hpp"
84 #include "runtime/javaThread.inline.hpp"
85 #include "runtime/jfieldIDWorkaround.hpp"
86 #include "runtime/jniHandles.inline.hpp"
87 #include "runtime/reflection.hpp"
88 #include "runtime/safepointVerifiers.hpp"
89 #include "runtime/sharedRuntime.hpp"
90 #include "runtime/signature.hpp"
91 #include "runtime/synchronizer.hpp"
92 #include "runtime/thread.inline.hpp"
93 #include "runtime/vmOperations.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_24;
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 int 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, int 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 int 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 int 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 int 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()) {
451 reflection_method = Reflection::new_constructor(m, CHECK_NULL);
452 } else {
453 // Note: Static initializers can theoretically be here, if JNI users manage
454 // to get their jmethodID. Record them as plain methods.
455 reflection_method = Reflection::new_method(m, false, CHECK_NULL);
456 }
457 ret = JNIHandles::make_local(THREAD, reflection_method);
458 return ret;
459 JNI_END
460
461 DT_RETURN_MARK_DECL(GetSuperclass, jclass
462 , HOTSPOT_JNI_GETSUPERCLASS_RETURN(_ret_ref));
463
464 JNI_ENTRY(jclass, jni_GetSuperclass(JNIEnv *env, jclass sub))
465 HOTSPOT_JNI_GETSUPERCLASS_ENTRY(env, sub);
466
467 jclass obj = nullptr;
468 DT_RETURN_MARK(GetSuperclass, jclass, (const jclass&)obj);
469
470 oop mirror = JNIHandles::resolve_non_null(sub);
471 // primitive classes return null
472 if (java_lang_Class::is_primitive(mirror)) return nullptr;
473
474 // Rules of Class.getSuperClass as implemented by KLass::java_super:
475 // arrays return Object
476 // interfaces return null
477 // proper classes return Klass::super()
478 Klass* k = java_lang_Class::as_Klass(mirror);
479 if (k->is_interface()) return nullptr;
480
481 // return mirror for superclass
482 Klass* super = k->java_super();
483 // super2 is the value computed by the compiler's getSuperClass intrinsic:
484 debug_only(Klass* super2 = ( k->is_array_klass()
485 ? vmClasses::Object_klass()
486 : k->super() ) );
487 assert(super == super2,
488 "java_super computation depends on interface, array, other super");
489 obj = (super == nullptr) ? nullptr : (jclass) JNIHandles::make_local(THREAD, super->java_mirror());
490 return obj;
491 JNI_END
492
493 JNI_ENTRY_NO_PRESERVE(jboolean, jni_IsAssignableFrom(JNIEnv *env, jclass sub, jclass super))
494 HOTSPOT_JNI_ISASSIGNABLEFROM_ENTRY(env, sub, super);
495
496 oop sub_mirror = JNIHandles::resolve_non_null(sub);
497 oop super_mirror = JNIHandles::resolve_non_null(super);
498 if (java_lang_Class::is_primitive(sub_mirror) ||
499 java_lang_Class::is_primitive(super_mirror)) {
500 jboolean ret = (sub_mirror == super_mirror);
501
502 HOTSPOT_JNI_ISASSIGNABLEFROM_RETURN(ret);
503 return ret;
504 }
505 Klass* sub_klass = java_lang_Class::as_Klass(sub_mirror);
506 Klass* super_klass = java_lang_Class::as_Klass(super_mirror);
507 assert(sub_klass != nullptr && super_klass != nullptr, "invalid arguments to jni_IsAssignableFrom");
508 jboolean ret = sub_klass->is_subtype_of(super_klass) ?
509 JNI_TRUE : JNI_FALSE;
510
511 HOTSPOT_JNI_ISASSIGNABLEFROM_RETURN(ret);
512 return ret;
513 JNI_END
514
515
516 DT_RETURN_MARK_DECL(Throw, jint
517 , HOTSPOT_JNI_THROW_RETURN(_ret_ref));
518
519 JNI_ENTRY(jint, jni_Throw(JNIEnv *env, jthrowable obj))
520 HOTSPOT_JNI_THROW_ENTRY(env, obj);
521
522 jint ret = JNI_OK;
523 DT_RETURN_MARK(Throw, jint, (const jint&)ret);
524
525 THROW_OOP_(JNIHandles::resolve(obj), JNI_OK);
526 ShouldNotReachHere();
527 return 0; // Mute compiler.
528 JNI_END
529
530
531 DT_RETURN_MARK_DECL(ThrowNew, jint
532 , HOTSPOT_JNI_THROWNEW_RETURN(_ret_ref));
533
534 JNI_ENTRY(jint, jni_ThrowNew(JNIEnv *env, jclass clazz, const char *message))
535 HOTSPOT_JNI_THROWNEW_ENTRY(env, clazz, (char *) message);
536
537 jint ret = JNI_OK;
538 DT_RETURN_MARK(ThrowNew, jint, (const jint&)ret);
539
540 InstanceKlass* k = InstanceKlass::cast(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz)));
541 Symbol* name = k->name();
542 Handle class_loader (THREAD, k->class_loader());
543 Handle protection_domain (THREAD, k->protection_domain());
544 THROW_MSG_LOADER_(name, (char *)message, class_loader, protection_domain, JNI_OK);
545 ShouldNotReachHere();
546 return 0; // Mute compiler.
547 JNI_END
548
549
550 // JNI functions only transform a pending async exception to a synchronous
551 // exception in ExceptionOccurred and ExceptionCheck calls, since
552 // delivering an async exception in other places won't change the native
553 // code's control flow and would be harmful when native code further calls
554 // JNI functions with a pending exception. Async exception is also checked
555 // during the call, so ExceptionOccurred/ExceptionCheck won't return
556 // false but deliver the async exception at the very end during
557 // state transition.
558
559 static void jni_check_async_exceptions(JavaThread *thread) {
560 assert(thread == Thread::current(), "must be itself");
561 if (thread->has_async_exception_condition()) {
562 SafepointMechanism::process_if_requested_with_exit_check(thread, true /* check asyncs */);
563 }
564 }
565
566 JNI_ENTRY_NO_PRESERVE(jthrowable, jni_ExceptionOccurred(JNIEnv *env))
567 HOTSPOT_JNI_EXCEPTIONOCCURRED_ENTRY(env);
568
569 jni_check_async_exceptions(thread);
570 oop exception = thread->pending_exception();
571 jthrowable ret = (jthrowable) JNIHandles::make_local(THREAD, exception);
572
573 HOTSPOT_JNI_EXCEPTIONOCCURRED_RETURN(ret);
574 return ret;
575 JNI_END
576
577
578 JNI_ENTRY_NO_PRESERVE(void, jni_ExceptionDescribe(JNIEnv *env))
579 HOTSPOT_JNI_EXCEPTIONDESCRIBE_ENTRY(env);
580
581 if (thread->has_pending_exception()) {
582 Handle ex(thread, thread->pending_exception());
583 thread->clear_pending_exception();
584 jio_fprintf(defaultStream::error_stream(), "Exception ");
585 if (thread != nullptr && thread->threadObj() != nullptr) {
586 ResourceMark rm(THREAD);
587 jio_fprintf(defaultStream::error_stream(),
588 "in thread \"%s\" ", thread->name());
589 }
590 if (ex->is_a(vmClasses::Throwable_klass())) {
591 JavaValue result(T_VOID);
592 JavaCalls::call_virtual(&result,
593 ex,
594 vmClasses::Throwable_klass(),
595 vmSymbols::printStackTrace_name(),
596 vmSymbols::void_method_signature(),
597 THREAD);
598 // If an exception is thrown in the call it gets thrown away. Not much
599 // we can do with it. The native code that calls this, does not check
600 // for the exception - hence, it might still be in the thread when DestroyVM gets
601 // called, potentially causing a few asserts to trigger - since no pending exception
602 // is expected.
603 CLEAR_PENDING_EXCEPTION;
604 } else {
605 ResourceMark rm(THREAD);
606 jio_fprintf(defaultStream::error_stream(),
607 ". Uncaught exception of type %s.",
608 ex->klass()->external_name());
609 }
610 }
611
612 HOTSPOT_JNI_EXCEPTIONDESCRIBE_RETURN();
613 JNI_END
614
615
616 JNI_ENTRY_NO_PRESERVE(void, jni_ExceptionClear(JNIEnv *env))
617 HOTSPOT_JNI_EXCEPTIONCLEAR_ENTRY(env);
618
619 // The jni code might be using this API to clear java thrown exception.
620 // So just mark jvmti thread exception state as exception caught.
621 JvmtiThreadState *state = JavaThread::current()->jvmti_thread_state();
622 if (state != nullptr && state->is_exception_detected()) {
623 state->set_exception_caught();
624 }
625 thread->clear_pending_exception();
626
627 HOTSPOT_JNI_EXCEPTIONCLEAR_RETURN();
628 JNI_END
629
630
631 JNI_ENTRY(void, jni_FatalError(JNIEnv *env, const char *msg))
632 HOTSPOT_JNI_FATALERROR_ENTRY(env, (char *) msg);
633
634 tty->print_cr("FATAL ERROR in native method: %s", msg);
635 thread->print_jni_stack();
636 os::abort(); // Dump core and abort
637 JNI_END
638
639
640 JNI_ENTRY(jint, jni_PushLocalFrame(JNIEnv *env, jint capacity))
641 HOTSPOT_JNI_PUSHLOCALFRAME_ENTRY(env, capacity);
642
643 //%note jni_11
644 if (capacity < 0 ||
645 ((MaxJNILocalCapacity > 0) && (capacity > MaxJNILocalCapacity))) {
646 HOTSPOT_JNI_PUSHLOCALFRAME_RETURN((uint32_t)JNI_ERR);
647 return JNI_ERR;
648 }
649
650 thread->push_jni_handle_block();
651 jint ret = JNI_OK;
652 HOTSPOT_JNI_PUSHLOCALFRAME_RETURN(ret);
653 return ret;
654 JNI_END
655
656
657 JNI_ENTRY(jobject, jni_PopLocalFrame(JNIEnv *env, jobject result))
658 HOTSPOT_JNI_POPLOCALFRAME_ENTRY(env, result);
659
660 //%note jni_11
661 Handle result_handle(thread, JNIHandles::resolve(result));
662 JNIHandleBlock* old_handles = thread->active_handles();
663 JNIHandleBlock* new_handles = old_handles->pop_frame_link();
664 if (new_handles != nullptr) {
665 // As a sanity check we only release the handle blocks if the pop_frame_link is not null.
666 // This way code will still work if PopLocalFrame is called without a corresponding
667 // PushLocalFrame call. Note that we set the pop_frame_link to null explicitly, otherwise
668 // the release_block call will release the blocks.
669 thread->set_active_handles(new_handles);
670 old_handles->set_pop_frame_link(nullptr); // clear link we won't release new_handles below
671 JNIHandleBlock::release_block(old_handles, thread); // may block
672 result = JNIHandles::make_local(thread, result_handle());
673 }
674 HOTSPOT_JNI_POPLOCALFRAME_RETURN(result);
675 return result;
676 JNI_END
677
678
679 JNI_ENTRY(jobject, jni_NewGlobalRef(JNIEnv *env, jobject ref))
680 HOTSPOT_JNI_NEWGLOBALREF_ENTRY(env, ref);
681
682 Handle ref_handle(thread, JNIHandles::resolve(ref));
683 jobject ret = JNIHandles::make_global(ref_handle, AllocFailStrategy::RETURN_NULL);
684
685 HOTSPOT_JNI_NEWGLOBALREF_RETURN(ret);
686 return ret;
687 JNI_END
688
689 // Must be JNI_ENTRY (with HandleMark)
690 JNI_ENTRY_NO_PRESERVE(void, jni_DeleteGlobalRef(JNIEnv *env, jobject ref))
691 HOTSPOT_JNI_DELETEGLOBALREF_ENTRY(env, ref);
692
693 JNIHandles::destroy_global(ref);
694
695 HOTSPOT_JNI_DELETEGLOBALREF_RETURN();
696 JNI_END
697
698 JNI_ENTRY_NO_PRESERVE(void, jni_DeleteLocalRef(JNIEnv *env, jobject obj))
699 HOTSPOT_JNI_DELETELOCALREF_ENTRY(env, obj);
700
701 JNIHandles::destroy_local(obj);
702
703 HOTSPOT_JNI_DELETELOCALREF_RETURN();
704 JNI_END
705
706 JNI_ENTRY_NO_PRESERVE(jboolean, jni_IsSameObject(JNIEnv *env, jobject r1, jobject r2))
707 HOTSPOT_JNI_ISSAMEOBJECT_ENTRY(env, r1, r2);
708
709 jboolean ret = JNIHandles::is_same_object(r1, r2) ? JNI_TRUE : JNI_FALSE;
710
711 HOTSPOT_JNI_ISSAMEOBJECT_RETURN(ret);
712 return ret;
713 JNI_END
714
715
716 JNI_ENTRY(jobject, jni_NewLocalRef(JNIEnv *env, jobject ref))
717 HOTSPOT_JNI_NEWLOCALREF_ENTRY(env, ref);
718
719 jobject ret = JNIHandles::make_local(THREAD, JNIHandles::resolve(ref),
720 AllocFailStrategy::RETURN_NULL);
721
722 HOTSPOT_JNI_NEWLOCALREF_RETURN(ret);
723 return ret;
724 JNI_END
725
726 JNI_LEAF(jint, jni_EnsureLocalCapacity(JNIEnv *env, jint capacity))
727 HOTSPOT_JNI_ENSURELOCALCAPACITY_ENTRY(env, capacity);
728
729 jint ret;
730 if (capacity >= 0 &&
731 ((MaxJNILocalCapacity <= 0) || (capacity <= MaxJNILocalCapacity))) {
732 ret = JNI_OK;
733 } else {
734 ret = JNI_ERR;
735 }
736
737 HOTSPOT_JNI_ENSURELOCALCAPACITY_RETURN(ret);
738 return ret;
739 JNI_END
740
741 // Return the Handle Type
742 JNI_LEAF(jobjectRefType, jni_GetObjectRefType(JNIEnv *env, jobject obj))
743 HOTSPOT_JNI_GETOBJECTREFTYPE_ENTRY(env, obj);
744
745 jobjectRefType ret = JNIInvalidRefType;
746 if (obj != nullptr) {
747 ret = JNIHandles::handle_type(thread, obj);
748 }
749
750 HOTSPOT_JNI_GETOBJECTREFTYPE_RETURN((void *) ret);
751 return ret;
752 JNI_END
753
754
755 class JNI_ArgumentPusher : public SignatureIterator {
756 protected:
757 JavaCallArguments* _arguments;
758
759 void push_int(jint x) { _arguments->push_int(x); }
760 void push_long(jlong x) { _arguments->push_long(x); }
761 void push_float(jfloat x) { _arguments->push_float(x); }
762 void push_double(jdouble x) { _arguments->push_double(x); }
763 void push_object(jobject x) { _arguments->push_jobject(x); }
764
765 void push_boolean(jboolean b) {
766 // Normalize boolean arguments from native code by converting 1-255 to JNI_TRUE and
767 // 0 to JNI_FALSE. Boolean return values from native are normalized the same in
768 // TemplateInterpreterGenerator::generate_result_handler_for and
769 // SharedRuntime::generate_native_wrapper.
770 push_int(b == 0 ? JNI_FALSE : JNI_TRUE);
771 }
772
773 JNI_ArgumentPusher(Method* method)
774 : SignatureIterator(method->signature(),
775 Fingerprinter(methodHandle(Thread::current(), method)).fingerprint())
776 {
777 _arguments = nullptr;
778 }
779
780 public:
781 virtual void push_arguments_on(JavaCallArguments* arguments) = 0;
782 };
783
784
785 class JNI_ArgumentPusherVaArg : public JNI_ArgumentPusher {
786 va_list _ap;
787
788 void set_ap(va_list rap) {
789 va_copy(_ap, rap);
790 }
791
792 friend class SignatureIterator; // so do_parameters_on can call do_type
793 void do_type(BasicType type) {
794 switch (type) {
795 // these are coerced to int when using va_arg
796 case T_BYTE:
797 case T_CHAR:
798 case T_SHORT:
799 case T_INT: push_int(va_arg(_ap, jint)); break;
800 case T_BOOLEAN: push_boolean((jboolean) va_arg(_ap, jint)); break;
801
802 // each of these paths is exercised by the various jck Call[Static,Nonvirtual,][Void,Int,..]Method[A,V,] tests
803
804 case T_LONG: push_long(va_arg(_ap, jlong)); break;
805 // float is coerced to double w/ va_arg
806 case T_FLOAT: push_float((jfloat) va_arg(_ap, jdouble)); break;
807 case T_DOUBLE: push_double(va_arg(_ap, jdouble)); break;
808
809 case T_ARRAY:
810 case T_OBJECT: push_object(va_arg(_ap, jobject)); break;
811 default: ShouldNotReachHere();
812 }
813 }
814
815 public:
816 JNI_ArgumentPusherVaArg(jmethodID method_id, va_list rap)
817 : JNI_ArgumentPusher(Method::resolve_jmethod_id(method_id)) {
818 set_ap(rap);
819 }
820
821 ~JNI_ArgumentPusherVaArg() {
822 va_end(_ap);
823 }
824
825 virtual void push_arguments_on(JavaCallArguments* arguments) {
826 _arguments = arguments;
827 do_parameters_on(this);
828 }
829 };
830
831
832 class JNI_ArgumentPusherArray : public JNI_ArgumentPusher {
833 protected:
834 const jvalue *_ap;
835
836 inline void set_ap(const jvalue *rap) { _ap = rap; }
837
838 friend class SignatureIterator; // so do_parameters_on can call do_type
839 void do_type(BasicType type) {
840 switch (type) {
841 case T_CHAR: push_int((_ap++)->c); break;
842 case T_SHORT: push_int((_ap++)->s); break;
843 case T_BYTE: push_int((_ap++)->b); break;
844 case T_INT: push_int((_ap++)->i); break;
845 case T_BOOLEAN: push_boolean((_ap++)->z); break;
846 case T_LONG: push_long((_ap++)->j); break;
847 case T_FLOAT: push_float((_ap++)->f); break;
848 case T_DOUBLE: push_double((_ap++)->d); break;
849 case T_ARRAY:
850 case T_OBJECT:
851 case T_PRIMITIVE_OBJECT: push_object((_ap++)->l); break;
852 default: ShouldNotReachHere();
853 }
854 }
855
856 public:
857 JNI_ArgumentPusherArray(jmethodID method_id, const jvalue *rap)
858 : JNI_ArgumentPusher(Method::resolve_jmethod_id(method_id)) {
859 set_ap(rap);
860 }
861
862 virtual void push_arguments_on(JavaCallArguments* arguments) {
863 _arguments = arguments;
864 do_parameters_on(this);
865 }
866 };
867
868
869 enum JNICallType {
870 JNI_STATIC,
871 JNI_VIRTUAL,
872 JNI_NONVIRTUAL
873 };
874
875
876
877 static void jni_invoke_static(JNIEnv *env, JavaValue* result, jobject receiver, JNICallType call_type, jmethodID method_id, JNI_ArgumentPusher *args, TRAPS) {
878 methodHandle method(THREAD, Method::resolve_jmethod_id(method_id));
879
880 // Create object to hold arguments for the JavaCall, and associate it with
881 // the jni parser
882 ResourceMark rm(THREAD);
883 int number_of_parameters = method->size_of_parameters();
884 JavaCallArguments java_args(number_of_parameters);
885
886 assert(method->is_static(), "method should be static");
887
888 // Fill out JavaCallArguments object
889 args->push_arguments_on(&java_args);
890 // Initialize result type
891 result->set_type(args->return_type());
892
893 // Invoke the method. Result is returned as oop.
894 JavaCalls::call(result, method, &java_args, CHECK);
895
896 // Convert result
897 if (is_reference_type(result->get_type())) {
898 result->set_jobject(JNIHandles::make_local(THREAD, result->get_oop()));
899 }
900 }
901
902
903 static void jni_invoke_nonstatic(JNIEnv *env, JavaValue* result, jobject receiver, JNICallType call_type, jmethodID method_id, JNI_ArgumentPusher *args, TRAPS) {
904 oop recv = JNIHandles::resolve(receiver);
905 if (recv == nullptr) {
906 THROW(vmSymbols::java_lang_NullPointerException());
907 }
908 Handle h_recv(THREAD, recv);
909
910 int number_of_parameters;
911 Method* selected_method;
912 {
913 Method* m = Method::resolve_jmethod_id(method_id);
914 number_of_parameters = m->size_of_parameters();
915 InstanceKlass* holder = m->method_holder();
916 if (call_type != JNI_VIRTUAL) {
917 selected_method = m;
918 } else if (!m->has_itable_index()) {
919 // non-interface call -- for that little speed boost, don't handlize
920 debug_only(NoSafepointVerifier nosafepoint;)
921 // jni_GetMethodID makes sure class is linked and initialized
922 // so m should have a valid vtable index.
923 assert(m->valid_vtable_index(), "no valid vtable index");
924 int vtbl_index = m->vtable_index();
925 if (vtbl_index != Method::nonvirtual_vtable_index) {
926 selected_method = h_recv->klass()->method_at_vtable(vtbl_index);
927 } else {
928 // final method
929 selected_method = m;
930 }
931 } else {
932 // interface call
933 int itbl_index = m->itable_index();
934 Klass* k = h_recv->klass();
935 selected_method = InstanceKlass::cast(k)->method_at_itable(holder, itbl_index, CHECK);
936 }
937 }
938
939 if (selected_method->is_abstract()) {
940 ResourceMark rm(THREAD);
941 THROW_MSG(vmSymbols::java_lang_AbstractMethodError(), selected_method->name()->as_C_string());
942 }
943
944 methodHandle method(THREAD, selected_method);
945
946 // Create object to hold arguments for the JavaCall, and associate it with
947 // the jni parser
948 ResourceMark rm(THREAD);
949 JavaCallArguments java_args(number_of_parameters);
950
951 // handle arguments
952 assert(!method->is_static(), "method %s should not be static", method->name_and_sig_as_C_string());
953 java_args.push_oop(h_recv); // Push jobject handle
954
955 // Fill out JavaCallArguments object
956 args->push_arguments_on(&java_args);
957 // Initialize result type
958 result->set_type(args->return_type());
959
960 // Invoke the method. Result is returned as oop.
961 JavaCalls::call(result, method, &java_args, CHECK);
962
963 // Convert result
964 if (is_reference_type(result->get_type())) {
965 result->set_jobject(JNIHandles::make_local(THREAD, result->get_oop()));
966 }
967 }
968
969 DT_RETURN_MARK_DECL(AllocObject, jobject
970 , HOTSPOT_JNI_ALLOCOBJECT_RETURN(_ret_ref));
971
972 JNI_ENTRY(jobject, jni_AllocObject(JNIEnv *env, jclass clazz))
973 HOTSPOT_JNI_ALLOCOBJECT_ENTRY(env, clazz);
974
975 jobject ret = nullptr;
976 DT_RETURN_MARK(AllocObject, jobject, (const jobject&)ret);
977
978 oop clazzoop = JNIHandles::resolve_non_null(clazz);
979 Klass* k = java_lang_Class::as_Klass(clazzoop);
980 if (k == nullptr || k->is_inline_klass()) {
981 ResourceMark rm(THREAD);
982 THROW_(vmSymbols::java_lang_InstantiationException(), nullptr);
983 }
984 instanceOop i = InstanceKlass::allocate_instance(clazzoop, CHECK_NULL);
985 ret = JNIHandles::make_local(THREAD, i);
986 return ret;
987 JNI_END
988
989 DT_RETURN_MARK_DECL(NewObjectA, jobject
990 , HOTSPOT_JNI_NEWOBJECTA_RETURN(_ret_ref));
991
992 JNI_ENTRY(jobject, jni_NewObjectA(JNIEnv *env, jclass clazz, jmethodID methodID, const jvalue *args))
993 HOTSPOT_JNI_NEWOBJECTA_ENTRY(env, clazz, (uintptr_t) methodID);
994
995 jobject obj = nullptr;
996 DT_RETURN_MARK(NewObjectA, jobject, (const jobject&)obj);
997
998 oop clazzoop = JNIHandles::resolve_non_null(clazz);
999 Klass* k = java_lang_Class::as_Klass(clazzoop);
1000 if (k == nullptr) {
1001 ResourceMark rm(THREAD);
1002 THROW_(vmSymbols::java_lang_InstantiationException(), nullptr);
1003 }
1004
1005 instanceOop i = InstanceKlass::allocate_instance(clazzoop, CHECK_NULL);
1006 obj = JNIHandles::make_local(THREAD, i);
1007 JavaValue jvalue(T_VOID);
1008 JNI_ArgumentPusherArray ap(methodID, args);
1009 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_NULL);
1010
1011 return obj;
1012 JNI_END
1013
1014
1015 DT_RETURN_MARK_DECL(NewObjectV, jobject
1016 , HOTSPOT_JNI_NEWOBJECTV_RETURN(_ret_ref));
1017
1018 JNI_ENTRY(jobject, jni_NewObjectV(JNIEnv *env, jclass clazz, jmethodID methodID, va_list args))
1019 HOTSPOT_JNI_NEWOBJECTV_ENTRY(env, clazz, (uintptr_t) methodID);
1020
1021 jobject obj = nullptr;
1022 DT_RETURN_MARK(NewObjectV, jobject, (const jobject&)obj);
1023
1024 oop clazzoop = JNIHandles::resolve_non_null(clazz);
1025 Klass* k = java_lang_Class::as_Klass(clazzoop);
1026 if (k == nullptr) {
1027 ResourceMark rm(THREAD);
1028 THROW_(vmSymbols::java_lang_InstantiationException(), nullptr);
1029 }
1030
1031 instanceOop i = InstanceKlass::allocate_instance(clazzoop, CHECK_NULL);
1032 obj = JNIHandles::make_local(THREAD, i);
1033 JavaValue jvalue(T_VOID);
1034 JNI_ArgumentPusherVaArg ap(methodID, args);
1035 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_NULL);
1036
1037 return obj;
1038 JNI_END
1039
1040
1041 DT_RETURN_MARK_DECL(NewObject, jobject
1042 , HOTSPOT_JNI_NEWOBJECT_RETURN(_ret_ref));
1043
1044 JNI_ENTRY(jobject, jni_NewObject(JNIEnv *env, jclass clazz, jmethodID methodID, ...))
1045 HOTSPOT_JNI_NEWOBJECT_ENTRY(env, clazz, (uintptr_t) methodID);
1046
1047 jobject obj = nullptr;
1048 DT_RETURN_MARK(NewObject, jobject, (const jobject&)obj);
1049
1050 oop clazzoop = JNIHandles::resolve_non_null(clazz);
1051 Klass* k = java_lang_Class::as_Klass(clazzoop);
1052 if (k == nullptr) {
1053 ResourceMark rm(THREAD);
1054 THROW_(vmSymbols::java_lang_InstantiationException(), nullptr);
1055 }
1056
1057 instanceOop i = InstanceKlass::allocate_instance(clazzoop, CHECK_NULL);
1058 obj = JNIHandles::make_local(THREAD, i);
1059 va_list args;
1060 va_start(args, methodID);
1061 JavaValue jvalue(T_VOID);
1062 JNI_ArgumentPusherVaArg ap(methodID, args);
1063 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_NULL);
1064 va_end(args);
1065
1066 return obj;
1067 JNI_END
1068
1069
1070 JNI_ENTRY(jclass, jni_GetObjectClass(JNIEnv *env, jobject obj))
1071 HOTSPOT_JNI_GETOBJECTCLASS_ENTRY(env, obj);
1072
1073 Klass* k = JNIHandles::resolve_non_null(obj)->klass();
1074 jclass ret =
1075 (jclass) JNIHandles::make_local(THREAD, k->java_mirror());
1076
1077 HOTSPOT_JNI_GETOBJECTCLASS_RETURN(ret);
1078 return ret;
1079 JNI_END
1080
1081 JNI_ENTRY_NO_PRESERVE(jboolean, jni_IsInstanceOf(JNIEnv *env, jobject obj, jclass clazz))
1082 HOTSPOT_JNI_ISINSTANCEOF_ENTRY(env, obj, clazz);
1083
1084 jboolean ret = JNI_TRUE;
1085 if (obj != nullptr) {
1086 ret = JNI_FALSE;
1087 Klass* k = java_lang_Class::as_Klass(
1088 JNIHandles::resolve_non_null(clazz));
1089 if (k != nullptr) {
1090 ret = JNIHandles::resolve_non_null(obj)->is_a(k) ? JNI_TRUE : JNI_FALSE;
1091 }
1092 }
1093
1094 HOTSPOT_JNI_ISINSTANCEOF_RETURN(ret);
1095 return ret;
1096 JNI_END
1097
1098
1099 static jmethodID get_method_id(JNIEnv *env, jclass clazz, const char *name_str,
1100 const char *sig, bool is_static, TRAPS) {
1101 // %%%% This code should probably just call into a method in the LinkResolver
1102 //
1103 // The class should have been loaded (we have an instance of the class
1104 // passed in) so the method and signature should already be in the symbol
1105 // table. If they're not there, the method doesn't exist.
1106 const char *name_to_probe = (name_str == nullptr)
1107 ? vmSymbols::object_initializer_name()->as_C_string()
1108 : name_str;
1109 TempNewSymbol name = SymbolTable::probe(name_to_probe, (int)strlen(name_to_probe));
1110 TempNewSymbol signature = SymbolTable::probe(sig, (int)strlen(sig));
1111
1112 if (name == nullptr || signature == nullptr) {
1113 THROW_MSG_NULL(vmSymbols::java_lang_NoSuchMethodError(), name_str);
1114 }
1115
1116 oop mirror = JNIHandles::resolve_non_null(clazz);
1117 Klass* klass = java_lang_Class::as_Klass(mirror);
1118
1119 // Throw a NoSuchMethodError exception if we have an instance of a
1120 // primitive java.lang.Class
1121 if (java_lang_Class::is_primitive(mirror)) {
1122 ResourceMark rm(THREAD);
1123 THROW_MSG_NULL(vmSymbols::java_lang_NoSuchMethodError(), err_msg("%s%s.%s%s", is_static ? "static " : "", klass->signature_name(), name_str, sig));
1124 }
1125
1126 // Make sure class is linked and initialized before handing id's out to
1127 // Method*s.
1128 klass->initialize(CHECK_NULL);
1129
1130 Method* m;
1131 if (name == vmSymbols::object_initializer_name() ||
1132 name == vmSymbols::class_initializer_name()) {
1133 // Never search superclasses for constructors
1134 if (klass->is_instance_klass()) {
1135 m = InstanceKlass::cast(klass)->find_method(name, signature);
1136 } else {
1137 m = nullptr;
1138 }
1139 } else {
1140 m = klass->lookup_method(name, signature);
1141 if (m == nullptr && klass->is_instance_klass()) {
1142 m = InstanceKlass::cast(klass)->lookup_method_in_ordered_interfaces(name, signature);
1143 }
1144 }
1145 if (m == nullptr || (m->is_static() != is_static)) {
1146 ResourceMark rm(THREAD);
1147 THROW_MSG_NULL(vmSymbols::java_lang_NoSuchMethodError(), err_msg("%s%s.%s%s", is_static ? "static " : "", klass->signature_name(), name_str, sig));
1148 }
1149 return m->jmethod_id();
1150 }
1151
1152
1153 JNI_ENTRY(jmethodID, jni_GetMethodID(JNIEnv *env, jclass clazz,
1154 const char *name, const char *sig))
1155 HOTSPOT_JNI_GETMETHODID_ENTRY(env, clazz, (char *) name, (char *) sig);
1156 jmethodID ret = get_method_id(env, clazz, name, sig, false, thread);
1157 HOTSPOT_JNI_GETMETHODID_RETURN((uintptr_t) ret);
1158 return ret;
1159 JNI_END
1160
1161
1162 JNI_ENTRY(jmethodID, jni_GetStaticMethodID(JNIEnv *env, jclass clazz,
1163 const char *name, const char *sig))
1164 HOTSPOT_JNI_GETSTATICMETHODID_ENTRY(env, (char *) clazz, (char *) name, (char *)sig);
1165 jmethodID ret = get_method_id(env, clazz, name, sig, true, thread);
1166 HOTSPOT_JNI_GETSTATICMETHODID_RETURN((uintptr_t) ret);
1167 return ret;
1168 JNI_END
1169
1170
1171
1172 //
1173 // Calling Methods
1174 //
1175
1176
1177 #define DEFINE_CALLMETHOD(ResultType, Result, Tag \
1178 , EntryProbe, ReturnProbe) \
1179 \
1180 DT_RETURN_MARK_DECL_FOR(Result, Call##Result##Method, ResultType \
1181 , ReturnProbe); \
1182 \
1183 JNI_ENTRY(ResultType, \
1184 jni_Call##Result##Method(JNIEnv *env, jobject obj, jmethodID methodID, ...)) \
1185 \
1186 EntryProbe; \
1187 ResultType ret{}; \
1188 DT_RETURN_MARK_FOR(Result, Call##Result##Method, ResultType, \
1189 (const ResultType&)ret);\
1190 \
1191 va_list args; \
1192 va_start(args, methodID); \
1193 JavaValue jvalue(Tag); \
1194 JNI_ArgumentPusherVaArg ap(methodID, args); \
1195 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK_(ResultType{})); \
1196 va_end(args); \
1197 ret = jvalue.get_##ResultType(); \
1198 return ret;\
1199 JNI_END
1200
1201 // the runtime type of subword integral basic types is integer
1202 DEFINE_CALLMETHOD(jboolean, Boolean, T_BOOLEAN
1203 , HOTSPOT_JNI_CALLBOOLEANMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1204 HOTSPOT_JNI_CALLBOOLEANMETHOD_RETURN(_ret_ref))
1205 DEFINE_CALLMETHOD(jbyte, Byte, T_BYTE
1206 , HOTSPOT_JNI_CALLBYTEMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1207 HOTSPOT_JNI_CALLBYTEMETHOD_RETURN(_ret_ref))
1208 DEFINE_CALLMETHOD(jchar, Char, T_CHAR
1209 , HOTSPOT_JNI_CALLCHARMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1210 HOTSPOT_JNI_CALLCHARMETHOD_RETURN(_ret_ref))
1211 DEFINE_CALLMETHOD(jshort, Short, T_SHORT
1212 , HOTSPOT_JNI_CALLSHORTMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1213 HOTSPOT_JNI_CALLSHORTMETHOD_RETURN(_ret_ref))
1214
1215 DEFINE_CALLMETHOD(jobject, Object, T_OBJECT
1216 , HOTSPOT_JNI_CALLOBJECTMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1217 HOTSPOT_JNI_CALLOBJECTMETHOD_RETURN(_ret_ref))
1218 DEFINE_CALLMETHOD(jint, Int, T_INT,
1219 HOTSPOT_JNI_CALLINTMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1220 HOTSPOT_JNI_CALLINTMETHOD_RETURN(_ret_ref))
1221 DEFINE_CALLMETHOD(jlong, Long, T_LONG
1222 , HOTSPOT_JNI_CALLLONGMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1223 HOTSPOT_JNI_CALLLONGMETHOD_RETURN(_ret_ref))
1224 // Float and double probes don't return value because dtrace doesn't currently support it
1225 DEFINE_CALLMETHOD(jfloat, Float, T_FLOAT
1226 , HOTSPOT_JNI_CALLFLOATMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1227 HOTSPOT_JNI_CALLFLOATMETHOD_RETURN())
1228 DEFINE_CALLMETHOD(jdouble, Double, T_DOUBLE
1229 , HOTSPOT_JNI_CALLDOUBLEMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1230 HOTSPOT_JNI_CALLDOUBLEMETHOD_RETURN())
1231
1232 #define DEFINE_CALLMETHODV(ResultType, Result, Tag \
1233 , EntryProbe, ReturnProbe) \
1234 \
1235 DT_RETURN_MARK_DECL_FOR(Result, Call##Result##MethodV, ResultType \
1236 , ReturnProbe); \
1237 \
1238 JNI_ENTRY(ResultType, \
1239 jni_Call##Result##MethodV(JNIEnv *env, jobject obj, jmethodID methodID, va_list args)) \
1240 \
1241 EntryProbe;\
1242 ResultType ret{}; \
1243 DT_RETURN_MARK_FOR(Result, Call##Result##MethodV, ResultType, \
1244 (const ResultType&)ret);\
1245 \
1246 JavaValue jvalue(Tag); \
1247 JNI_ArgumentPusherVaArg ap(methodID, args); \
1248 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK_(ResultType{})); \
1249 ret = jvalue.get_##ResultType(); \
1250 return ret;\
1251 JNI_END
1252
1253 // the runtime type of subword integral basic types is integer
1254 DEFINE_CALLMETHODV(jboolean, Boolean, T_BOOLEAN
1255 , HOTSPOT_JNI_CALLBOOLEANMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1256 HOTSPOT_JNI_CALLBOOLEANMETHODV_RETURN(_ret_ref))
1257 DEFINE_CALLMETHODV(jbyte, Byte, T_BYTE
1258 , HOTSPOT_JNI_CALLBYTEMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1259 HOTSPOT_JNI_CALLBYTEMETHODV_RETURN(_ret_ref))
1260 DEFINE_CALLMETHODV(jchar, Char, T_CHAR
1261 , HOTSPOT_JNI_CALLCHARMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1262 HOTSPOT_JNI_CALLCHARMETHODV_RETURN(_ret_ref))
1263 DEFINE_CALLMETHODV(jshort, Short, T_SHORT
1264 , HOTSPOT_JNI_CALLSHORTMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1265 HOTSPOT_JNI_CALLSHORTMETHODV_RETURN(_ret_ref))
1266
1267 DEFINE_CALLMETHODV(jobject, Object, T_OBJECT
1268 , HOTSPOT_JNI_CALLOBJECTMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1269 HOTSPOT_JNI_CALLOBJECTMETHODV_RETURN(_ret_ref))
1270 DEFINE_CALLMETHODV(jint, Int, T_INT,
1271 HOTSPOT_JNI_CALLINTMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1272 HOTSPOT_JNI_CALLINTMETHODV_RETURN(_ret_ref))
1273 DEFINE_CALLMETHODV(jlong, Long, T_LONG
1274 , HOTSPOT_JNI_CALLLONGMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1275 HOTSPOT_JNI_CALLLONGMETHODV_RETURN(_ret_ref))
1276 // Float and double probes don't return value because dtrace doesn't currently support it
1277 DEFINE_CALLMETHODV(jfloat, Float, T_FLOAT
1278 , HOTSPOT_JNI_CALLFLOATMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1279 HOTSPOT_JNI_CALLFLOATMETHODV_RETURN())
1280 DEFINE_CALLMETHODV(jdouble, Double, T_DOUBLE
1281 , HOTSPOT_JNI_CALLDOUBLEMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1282 HOTSPOT_JNI_CALLDOUBLEMETHODV_RETURN())
1283
1284 #define DEFINE_CALLMETHODA(ResultType, Result, Tag \
1285 , EntryProbe, ReturnProbe) \
1286 \
1287 DT_RETURN_MARK_DECL_FOR(Result, Call##Result##MethodA, ResultType \
1288 , ReturnProbe); \
1289 \
1290 JNI_ENTRY(ResultType, \
1291 jni_Call##Result##MethodA(JNIEnv *env, jobject obj, jmethodID methodID, const jvalue *args)) \
1292 EntryProbe; \
1293 ResultType ret{}; \
1294 DT_RETURN_MARK_FOR(Result, Call##Result##MethodA, ResultType, \
1295 (const ResultType&)ret);\
1296 \
1297 JavaValue jvalue(Tag); \
1298 JNI_ArgumentPusherArray ap(methodID, args); \
1299 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK_(ResultType{})); \
1300 ret = jvalue.get_##ResultType(); \
1301 return ret;\
1302 JNI_END
1303
1304 // the runtime type of subword integral basic types is integer
1305 DEFINE_CALLMETHODA(jboolean, Boolean, T_BOOLEAN
1306 , HOTSPOT_JNI_CALLBOOLEANMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1307 HOTSPOT_JNI_CALLBOOLEANMETHODA_RETURN(_ret_ref))
1308 DEFINE_CALLMETHODA(jbyte, Byte, T_BYTE
1309 , HOTSPOT_JNI_CALLBYTEMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1310 HOTSPOT_JNI_CALLBYTEMETHODA_RETURN(_ret_ref))
1311 DEFINE_CALLMETHODA(jchar, Char, T_CHAR
1312 , HOTSPOT_JNI_CALLCHARMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1313 HOTSPOT_JNI_CALLCHARMETHODA_RETURN(_ret_ref))
1314 DEFINE_CALLMETHODA(jshort, Short, T_SHORT
1315 , HOTSPOT_JNI_CALLSHORTMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1316 HOTSPOT_JNI_CALLSHORTMETHODA_RETURN(_ret_ref))
1317
1318 DEFINE_CALLMETHODA(jobject, Object, T_OBJECT
1319 , HOTSPOT_JNI_CALLOBJECTMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1320 HOTSPOT_JNI_CALLOBJECTMETHODA_RETURN(_ret_ref))
1321 DEFINE_CALLMETHODA(jint, Int, T_INT,
1322 HOTSPOT_JNI_CALLINTMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1323 HOTSPOT_JNI_CALLINTMETHODA_RETURN(_ret_ref))
1324 DEFINE_CALLMETHODA(jlong, Long, T_LONG
1325 , HOTSPOT_JNI_CALLLONGMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1326 HOTSPOT_JNI_CALLLONGMETHODA_RETURN(_ret_ref))
1327 // Float and double probes don't return value because dtrace doesn't currently support it
1328 DEFINE_CALLMETHODA(jfloat, Float, T_FLOAT
1329 , HOTSPOT_JNI_CALLFLOATMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1330 HOTSPOT_JNI_CALLFLOATMETHODA_RETURN())
1331 DEFINE_CALLMETHODA(jdouble, Double, T_DOUBLE
1332 , HOTSPOT_JNI_CALLDOUBLEMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1333 HOTSPOT_JNI_CALLDOUBLEMETHODA_RETURN())
1334
1335 DT_VOID_RETURN_MARK_DECL(CallVoidMethod, HOTSPOT_JNI_CALLVOIDMETHOD_RETURN());
1336 DT_VOID_RETURN_MARK_DECL(CallVoidMethodV, HOTSPOT_JNI_CALLVOIDMETHODV_RETURN());
1337 DT_VOID_RETURN_MARK_DECL(CallVoidMethodA, HOTSPOT_JNI_CALLVOIDMETHODA_RETURN());
1338
1339
1340 JNI_ENTRY(void, jni_CallVoidMethod(JNIEnv *env, jobject obj, jmethodID methodID, ...))
1341 HOTSPOT_JNI_CALLVOIDMETHOD_ENTRY(env, obj, (uintptr_t) methodID);
1342 DT_VOID_RETURN_MARK(CallVoidMethod);
1343
1344 va_list args;
1345 va_start(args, methodID);
1346 JavaValue jvalue(T_VOID);
1347 JNI_ArgumentPusherVaArg ap(methodID, args);
1348 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK);
1349 va_end(args);
1350 JNI_END
1351
1352
1353 JNI_ENTRY(void, jni_CallVoidMethodV(JNIEnv *env, jobject obj, jmethodID methodID, va_list args))
1354 HOTSPOT_JNI_CALLVOIDMETHODV_ENTRY(env, obj, (uintptr_t) methodID);
1355 DT_VOID_RETURN_MARK(CallVoidMethodV);
1356
1357 JavaValue jvalue(T_VOID);
1358 JNI_ArgumentPusherVaArg ap(methodID, args);
1359 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK);
1360 JNI_END
1361
1362
1363 JNI_ENTRY(void, jni_CallVoidMethodA(JNIEnv *env, jobject obj, jmethodID methodID, const jvalue *args))
1364 HOTSPOT_JNI_CALLVOIDMETHODA_ENTRY(env, obj, (uintptr_t) methodID);
1365 DT_VOID_RETURN_MARK(CallVoidMethodA);
1366
1367 JavaValue jvalue(T_VOID);
1368 JNI_ArgumentPusherArray ap(methodID, args);
1369 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK);
1370 JNI_END
1371
1372
1373
1374 #define DEFINE_CALLNONVIRTUALMETHOD(ResultType, Result, Tag \
1375 , EntryProbe, ReturnProbe) \
1376 \
1377 DT_RETURN_MARK_DECL_FOR(Result, CallNonvirtual##Result##Method, ResultType \
1378 , ReturnProbe);\
1379 \
1380 JNI_ENTRY(ResultType, \
1381 jni_CallNonvirtual##Result##Method(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, ...)) \
1382 \
1383 EntryProbe;\
1384 ResultType ret;\
1385 DT_RETURN_MARK_FOR(Result, CallNonvirtual##Result##Method, ResultType, \
1386 (const ResultType&)ret);\
1387 \
1388 va_list args; \
1389 va_start(args, methodID); \
1390 JavaValue jvalue(Tag); \
1391 JNI_ArgumentPusherVaArg ap(methodID, args); \
1392 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_(ResultType{})); \
1393 va_end(args); \
1394 ret = jvalue.get_##ResultType(); \
1395 return ret;\
1396 JNI_END
1397
1398 // the runtime type of subword integral basic types is integer
1399 DEFINE_CALLNONVIRTUALMETHOD(jboolean, Boolean, T_BOOLEAN
1400 , HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1401 HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHOD_RETURN(_ret_ref))
1402 DEFINE_CALLNONVIRTUALMETHOD(jbyte, Byte, T_BYTE
1403 , HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1404 HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHOD_RETURN(_ret_ref))
1405 DEFINE_CALLNONVIRTUALMETHOD(jchar, Char, T_CHAR
1406 , HOTSPOT_JNI_CALLNONVIRTUALCHARMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1407 HOTSPOT_JNI_CALLNONVIRTUALCHARMETHOD_RETURN(_ret_ref))
1408 DEFINE_CALLNONVIRTUALMETHOD(jshort, Short, T_SHORT
1409 , HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1410 HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHOD_RETURN(_ret_ref))
1411
1412 DEFINE_CALLNONVIRTUALMETHOD(jobject, Object, T_OBJECT
1413 , HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1414 HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHOD_RETURN(_ret_ref))
1415 DEFINE_CALLNONVIRTUALMETHOD(jint, Int, T_INT
1416 , HOTSPOT_JNI_CALLNONVIRTUALINTMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1417 HOTSPOT_JNI_CALLNONVIRTUALINTMETHOD_RETURN(_ret_ref))
1418 DEFINE_CALLNONVIRTUALMETHOD(jlong, Long, T_LONG
1419 , HOTSPOT_JNI_CALLNONVIRTUALLONGMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1420 // Float and double probes don't return value because dtrace doesn't currently support it
1421 HOTSPOT_JNI_CALLNONVIRTUALLONGMETHOD_RETURN(_ret_ref))
1422 DEFINE_CALLNONVIRTUALMETHOD(jfloat, Float, T_FLOAT
1423 , HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1424 HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHOD_RETURN())
1425 DEFINE_CALLNONVIRTUALMETHOD(jdouble, Double, T_DOUBLE
1426 , HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1427 HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHOD_RETURN())
1428
1429 #define DEFINE_CALLNONVIRTUALMETHODV(ResultType, Result, Tag \
1430 , EntryProbe, ReturnProbe) \
1431 \
1432 DT_RETURN_MARK_DECL_FOR(Result, CallNonvirtual##Result##MethodV, ResultType \
1433 , ReturnProbe);\
1434 \
1435 JNI_ENTRY(ResultType, \
1436 jni_CallNonvirtual##Result##MethodV(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, va_list args)) \
1437 \
1438 EntryProbe;\
1439 ResultType ret;\
1440 DT_RETURN_MARK_FOR(Result, CallNonvirtual##Result##MethodV, ResultType, \
1441 (const ResultType&)ret);\
1442 \
1443 JavaValue jvalue(Tag); \
1444 JNI_ArgumentPusherVaArg ap(methodID, args); \
1445 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_(ResultType{})); \
1446 ret = jvalue.get_##ResultType(); \
1447 return ret;\
1448 JNI_END
1449
1450 // the runtime type of subword integral basic types is integer
1451 DEFINE_CALLNONVIRTUALMETHODV(jboolean, Boolean, T_BOOLEAN
1452 , HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1453 HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHODV_RETURN(_ret_ref))
1454 DEFINE_CALLNONVIRTUALMETHODV(jbyte, Byte, T_BYTE
1455 , HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1456 HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHODV_RETURN(_ret_ref))
1457 DEFINE_CALLNONVIRTUALMETHODV(jchar, Char, T_CHAR
1458 , HOTSPOT_JNI_CALLNONVIRTUALCHARMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1459 HOTSPOT_JNI_CALLNONVIRTUALCHARMETHODV_RETURN(_ret_ref))
1460 DEFINE_CALLNONVIRTUALMETHODV(jshort, Short, T_SHORT
1461 , HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1462 HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHODV_RETURN(_ret_ref))
1463
1464 DEFINE_CALLNONVIRTUALMETHODV(jobject, Object, T_OBJECT
1465 , HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1466 HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHODV_RETURN(_ret_ref))
1467 DEFINE_CALLNONVIRTUALMETHODV(jint, Int, T_INT
1468 , HOTSPOT_JNI_CALLNONVIRTUALINTMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1469 HOTSPOT_JNI_CALLNONVIRTUALINTMETHODV_RETURN(_ret_ref))
1470 DEFINE_CALLNONVIRTUALMETHODV(jlong, Long, T_LONG
1471 , HOTSPOT_JNI_CALLNONVIRTUALLONGMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1472 // Float and double probes don't return value because dtrace doesn't currently support it
1473 HOTSPOT_JNI_CALLNONVIRTUALLONGMETHODV_RETURN(_ret_ref))
1474 DEFINE_CALLNONVIRTUALMETHODV(jfloat, Float, T_FLOAT
1475 , HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1476 HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHODV_RETURN())
1477 DEFINE_CALLNONVIRTUALMETHODV(jdouble, Double, T_DOUBLE
1478 , HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1479 HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHODV_RETURN())
1480
1481 #define DEFINE_CALLNONVIRTUALMETHODA(ResultType, Result, Tag \
1482 , EntryProbe, ReturnProbe) \
1483 \
1484 DT_RETURN_MARK_DECL_FOR(Result, CallNonvirtual##Result##MethodA, ResultType \
1485 , ReturnProbe);\
1486 \
1487 JNI_ENTRY(ResultType, \
1488 jni_CallNonvirtual##Result##MethodA(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, const jvalue *args)) \
1489 \
1490 EntryProbe;\
1491 ResultType ret;\
1492 DT_RETURN_MARK_FOR(Result, CallNonvirtual##Result##MethodA, ResultType, \
1493 (const ResultType&)ret);\
1494 \
1495 JavaValue jvalue(Tag); \
1496 JNI_ArgumentPusherArray ap(methodID, args); \
1497 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_(ResultType{})); \
1498 ret = jvalue.get_##ResultType(); \
1499 return ret;\
1500 JNI_END
1501
1502 // the runtime type of subword integral basic types is integer
1503 DEFINE_CALLNONVIRTUALMETHODA(jboolean, Boolean, T_BOOLEAN
1504 , HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1505 HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHODA_RETURN(_ret_ref))
1506 DEFINE_CALLNONVIRTUALMETHODA(jbyte, Byte, T_BYTE
1507 , HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1508 HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHODA_RETURN(_ret_ref))
1509 DEFINE_CALLNONVIRTUALMETHODA(jchar, Char, T_CHAR
1510 , HOTSPOT_JNI_CALLNONVIRTUALCHARMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1511 HOTSPOT_JNI_CALLNONVIRTUALCHARMETHODA_RETURN(_ret_ref))
1512 DEFINE_CALLNONVIRTUALMETHODA(jshort, Short, T_SHORT
1513 , HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1514 HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHODA_RETURN(_ret_ref))
1515
1516 DEFINE_CALLNONVIRTUALMETHODA(jobject, Object, T_OBJECT
1517 , HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1518 HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHODA_RETURN(_ret_ref))
1519 DEFINE_CALLNONVIRTUALMETHODA(jint, Int, T_INT
1520 , HOTSPOT_JNI_CALLNONVIRTUALINTMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1521 HOTSPOT_JNI_CALLNONVIRTUALINTMETHODA_RETURN(_ret_ref))
1522 DEFINE_CALLNONVIRTUALMETHODA(jlong, Long, T_LONG
1523 , HOTSPOT_JNI_CALLNONVIRTUALLONGMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1524 // Float and double probes don't return value because dtrace doesn't currently support it
1525 HOTSPOT_JNI_CALLNONVIRTUALLONGMETHODA_RETURN(_ret_ref))
1526 DEFINE_CALLNONVIRTUALMETHODA(jfloat, Float, T_FLOAT
1527 , HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1528 HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHODA_RETURN())
1529 DEFINE_CALLNONVIRTUALMETHODA(jdouble, Double, T_DOUBLE
1530 , HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1531 HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHODA_RETURN())
1532
1533 DT_VOID_RETURN_MARK_DECL(CallNonvirtualVoidMethod
1534 , HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHOD_RETURN());
1535 DT_VOID_RETURN_MARK_DECL(CallNonvirtualVoidMethodV
1536 , HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHODV_RETURN());
1537 DT_VOID_RETURN_MARK_DECL(CallNonvirtualVoidMethodA
1538 , HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHODA_RETURN());
1539
1540 JNI_ENTRY(void, jni_CallNonvirtualVoidMethod(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, ...))
1541 HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHOD_ENTRY(env, obj, cls, (uintptr_t) methodID);
1542 DT_VOID_RETURN_MARK(CallNonvirtualVoidMethod);
1543
1544 va_list args;
1545 va_start(args, methodID);
1546 JavaValue jvalue(T_VOID);
1547 JNI_ArgumentPusherVaArg ap(methodID, args);
1548 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK);
1549 va_end(args);
1550 JNI_END
1551
1552
1553 JNI_ENTRY(void, jni_CallNonvirtualVoidMethodV(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, va_list args))
1554 HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHODV_ENTRY(
1555 env, obj, cls, (uintptr_t) methodID);
1556 DT_VOID_RETURN_MARK(CallNonvirtualVoidMethodV);
1557
1558 JavaValue jvalue(T_VOID);
1559 JNI_ArgumentPusherVaArg ap(methodID, args);
1560 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK);
1561 JNI_END
1562
1563
1564 JNI_ENTRY(void, jni_CallNonvirtualVoidMethodA(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, const jvalue *args))
1565 HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHODA_ENTRY(
1566 env, obj, cls, (uintptr_t) methodID);
1567 DT_VOID_RETURN_MARK(CallNonvirtualVoidMethodA);
1568 JavaValue jvalue(T_VOID);
1569 JNI_ArgumentPusherArray ap(methodID, args);
1570 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK);
1571 JNI_END
1572
1573
1574
1575 #define DEFINE_CALLSTATICMETHOD(ResultType, Result, Tag \
1576 , EntryProbe, ResultProbe) \
1577 \
1578 DT_RETURN_MARK_DECL_FOR(Result, CallStatic##Result##Method, ResultType \
1579 , ResultProbe); \
1580 \
1581 JNI_ENTRY(ResultType, \
1582 jni_CallStatic##Result##Method(JNIEnv *env, jclass cls, jmethodID methodID, ...)) \
1583 \
1584 EntryProbe; \
1585 ResultType ret{}; \
1586 DT_RETURN_MARK_FOR(Result, CallStatic##Result##Method, ResultType, \
1587 (const ResultType&)ret);\
1588 \
1589 va_list args; \
1590 va_start(args, methodID); \
1591 JavaValue jvalue(Tag); \
1592 JNI_ArgumentPusherVaArg ap(methodID, args); \
1593 jni_invoke_static(env, &jvalue, nullptr, JNI_STATIC, methodID, &ap, CHECK_(ResultType{})); \
1594 va_end(args); \
1595 ret = jvalue.get_##ResultType(); \
1596 return ret;\
1597 JNI_END
1598
1599 // the runtime type of subword integral basic types is integer
1600 DEFINE_CALLSTATICMETHOD(jboolean, Boolean, T_BOOLEAN
1601 , HOTSPOT_JNI_CALLSTATICBOOLEANMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1602 HOTSPOT_JNI_CALLSTATICBOOLEANMETHOD_RETURN(_ret_ref));
1603 DEFINE_CALLSTATICMETHOD(jbyte, Byte, T_BYTE
1604 , HOTSPOT_JNI_CALLSTATICBYTEMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1605 HOTSPOT_JNI_CALLSTATICBYTEMETHOD_RETURN(_ret_ref));
1606 DEFINE_CALLSTATICMETHOD(jchar, Char, T_CHAR
1607 , HOTSPOT_JNI_CALLSTATICCHARMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1608 HOTSPOT_JNI_CALLSTATICCHARMETHOD_RETURN(_ret_ref));
1609 DEFINE_CALLSTATICMETHOD(jshort, Short, T_SHORT
1610 , HOTSPOT_JNI_CALLSTATICSHORTMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1611 HOTSPOT_JNI_CALLSTATICSHORTMETHOD_RETURN(_ret_ref));
1612
1613 DEFINE_CALLSTATICMETHOD(jobject, Object, T_OBJECT
1614 , HOTSPOT_JNI_CALLSTATICOBJECTMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1615 HOTSPOT_JNI_CALLSTATICOBJECTMETHOD_RETURN(_ret_ref));
1616 DEFINE_CALLSTATICMETHOD(jint, Int, T_INT
1617 , HOTSPOT_JNI_CALLSTATICINTMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1618 HOTSPOT_JNI_CALLSTATICINTMETHOD_RETURN(_ret_ref));
1619 DEFINE_CALLSTATICMETHOD(jlong, Long, T_LONG
1620 , HOTSPOT_JNI_CALLSTATICLONGMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1621 HOTSPOT_JNI_CALLSTATICLONGMETHOD_RETURN(_ret_ref));
1622 // Float and double probes don't return value because dtrace doesn't currently support it
1623 DEFINE_CALLSTATICMETHOD(jfloat, Float, T_FLOAT
1624 , HOTSPOT_JNI_CALLSTATICFLOATMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1625 HOTSPOT_JNI_CALLSTATICFLOATMETHOD_RETURN());
1626 DEFINE_CALLSTATICMETHOD(jdouble, Double, T_DOUBLE
1627 , HOTSPOT_JNI_CALLSTATICDOUBLEMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1628 HOTSPOT_JNI_CALLSTATICDOUBLEMETHOD_RETURN());
1629
1630 #define DEFINE_CALLSTATICMETHODV(ResultType, Result, Tag \
1631 , EntryProbe, ResultProbe) \
1632 \
1633 DT_RETURN_MARK_DECL_FOR(Result, CallStatic##Result##MethodV, ResultType \
1634 , ResultProbe); \
1635 \
1636 JNI_ENTRY(ResultType, \
1637 jni_CallStatic##Result##MethodV(JNIEnv *env, jclass cls, jmethodID methodID, va_list args)) \
1638 \
1639 EntryProbe; \
1640 ResultType ret{}; \
1641 DT_RETURN_MARK_FOR(Result, CallStatic##Result##MethodV, ResultType, \
1642 (const ResultType&)ret);\
1643 \
1644 JavaValue jvalue(Tag); \
1645 JNI_ArgumentPusherVaArg ap(methodID, args); \
1646 /* Make sure class is initialized before trying to invoke its method */ \
1647 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); \
1648 k->initialize(CHECK_(ResultType{})); \
1649 jni_invoke_static(env, &jvalue, nullptr, JNI_STATIC, methodID, &ap, CHECK_(ResultType{})); \
1650 va_end(args); \
1651 ret = jvalue.get_##ResultType(); \
1652 return ret;\
1653 JNI_END
1654
1655 // the runtime type of subword integral basic types is integer
1656 DEFINE_CALLSTATICMETHODV(jboolean, Boolean, T_BOOLEAN
1657 , HOTSPOT_JNI_CALLSTATICBOOLEANMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1658 HOTSPOT_JNI_CALLSTATICBOOLEANMETHODV_RETURN(_ret_ref));
1659 DEFINE_CALLSTATICMETHODV(jbyte, Byte, T_BYTE
1660 , HOTSPOT_JNI_CALLSTATICBYTEMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1661 HOTSPOT_JNI_CALLSTATICBYTEMETHODV_RETURN(_ret_ref));
1662 DEFINE_CALLSTATICMETHODV(jchar, Char, T_CHAR
1663 , HOTSPOT_JNI_CALLSTATICCHARMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1664 HOTSPOT_JNI_CALLSTATICCHARMETHODV_RETURN(_ret_ref));
1665 DEFINE_CALLSTATICMETHODV(jshort, Short, T_SHORT
1666 , HOTSPOT_JNI_CALLSTATICSHORTMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1667 HOTSPOT_JNI_CALLSTATICSHORTMETHODV_RETURN(_ret_ref));
1668
1669 DEFINE_CALLSTATICMETHODV(jobject, Object, T_OBJECT
1670 , HOTSPOT_JNI_CALLSTATICOBJECTMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1671 HOTSPOT_JNI_CALLSTATICOBJECTMETHODV_RETURN(_ret_ref));
1672 DEFINE_CALLSTATICMETHODV(jint, Int, T_INT
1673 , HOTSPOT_JNI_CALLSTATICINTMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1674 HOTSPOT_JNI_CALLSTATICINTMETHODV_RETURN(_ret_ref));
1675 DEFINE_CALLSTATICMETHODV(jlong, Long, T_LONG
1676 , HOTSPOT_JNI_CALLSTATICLONGMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1677 HOTSPOT_JNI_CALLSTATICLONGMETHODV_RETURN(_ret_ref));
1678 // Float and double probes don't return value because dtrace doesn't currently support it
1679 DEFINE_CALLSTATICMETHODV(jfloat, Float, T_FLOAT
1680 , HOTSPOT_JNI_CALLSTATICFLOATMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1681 HOTSPOT_JNI_CALLSTATICFLOATMETHODV_RETURN());
1682 DEFINE_CALLSTATICMETHODV(jdouble, Double, T_DOUBLE
1683 , HOTSPOT_JNI_CALLSTATICDOUBLEMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1684 HOTSPOT_JNI_CALLSTATICDOUBLEMETHODV_RETURN());
1685
1686 #define DEFINE_CALLSTATICMETHODA(ResultType, Result, Tag \
1687 , EntryProbe, ResultProbe) \
1688 \
1689 DT_RETURN_MARK_DECL_FOR(Result, CallStatic##Result##MethodA, ResultType \
1690 , ResultProbe); \
1691 \
1692 JNI_ENTRY(ResultType, \
1693 jni_CallStatic##Result##MethodA(JNIEnv *env, jclass cls, jmethodID methodID, const jvalue *args)) \
1694 \
1695 EntryProbe; \
1696 ResultType ret{}; \
1697 DT_RETURN_MARK_FOR(Result, CallStatic##Result##MethodA, ResultType, \
1698 (const ResultType&)ret);\
1699 \
1700 JavaValue jvalue(Tag); \
1701 JNI_ArgumentPusherArray ap(methodID, args); \
1702 jni_invoke_static(env, &jvalue, nullptr, JNI_STATIC, methodID, &ap, CHECK_(ResultType{})); \
1703 ret = jvalue.get_##ResultType(); \
1704 return ret;\
1705 JNI_END
1706
1707 // the runtime type of subword integral basic types is integer
1708 DEFINE_CALLSTATICMETHODA(jboolean, Boolean, T_BOOLEAN
1709 , HOTSPOT_JNI_CALLSTATICBOOLEANMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1710 HOTSPOT_JNI_CALLSTATICBOOLEANMETHODA_RETURN(_ret_ref));
1711 DEFINE_CALLSTATICMETHODA(jbyte, Byte, T_BYTE
1712 , HOTSPOT_JNI_CALLSTATICBYTEMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1713 HOTSPOT_JNI_CALLSTATICBYTEMETHODA_RETURN(_ret_ref));
1714 DEFINE_CALLSTATICMETHODA(jchar, Char, T_CHAR
1715 , HOTSPOT_JNI_CALLSTATICCHARMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1716 HOTSPOT_JNI_CALLSTATICCHARMETHODA_RETURN(_ret_ref));
1717 DEFINE_CALLSTATICMETHODA(jshort, Short, T_SHORT
1718 , HOTSPOT_JNI_CALLSTATICSHORTMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1719 HOTSPOT_JNI_CALLSTATICSHORTMETHODA_RETURN(_ret_ref));
1720
1721 DEFINE_CALLSTATICMETHODA(jobject, Object, T_OBJECT
1722 , HOTSPOT_JNI_CALLSTATICOBJECTMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1723 HOTSPOT_JNI_CALLSTATICOBJECTMETHODA_RETURN(_ret_ref));
1724 DEFINE_CALLSTATICMETHODA(jint, Int, T_INT
1725 , HOTSPOT_JNI_CALLSTATICINTMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1726 HOTSPOT_JNI_CALLSTATICINTMETHODA_RETURN(_ret_ref));
1727 DEFINE_CALLSTATICMETHODA(jlong, Long, T_LONG
1728 , HOTSPOT_JNI_CALLSTATICLONGMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1729 HOTSPOT_JNI_CALLSTATICLONGMETHODA_RETURN(_ret_ref));
1730 // Float and double probes don't return value because dtrace doesn't currently support it
1731 DEFINE_CALLSTATICMETHODA(jfloat, Float, T_FLOAT
1732 , HOTSPOT_JNI_CALLSTATICFLOATMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1733 HOTSPOT_JNI_CALLSTATICFLOATMETHODA_RETURN());
1734 DEFINE_CALLSTATICMETHODA(jdouble, Double, T_DOUBLE
1735 , HOTSPOT_JNI_CALLSTATICDOUBLEMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1736 HOTSPOT_JNI_CALLSTATICDOUBLEMETHODA_RETURN());
1737
1738 DT_VOID_RETURN_MARK_DECL(CallStaticVoidMethod
1739 , HOTSPOT_JNI_CALLSTATICVOIDMETHOD_RETURN());
1740 DT_VOID_RETURN_MARK_DECL(CallStaticVoidMethodV
1741 , HOTSPOT_JNI_CALLSTATICVOIDMETHODV_RETURN());
1742 DT_VOID_RETURN_MARK_DECL(CallStaticVoidMethodA
1743 , HOTSPOT_JNI_CALLSTATICVOIDMETHODA_RETURN());
1744
1745 JNI_ENTRY(void, jni_CallStaticVoidMethod(JNIEnv *env, jclass cls, jmethodID methodID, ...))
1746 HOTSPOT_JNI_CALLSTATICVOIDMETHOD_ENTRY(env, cls, (uintptr_t) methodID);
1747 DT_VOID_RETURN_MARK(CallStaticVoidMethod);
1748
1749 va_list args;
1750 va_start(args, methodID);
1751 JavaValue jvalue(T_VOID);
1752 JNI_ArgumentPusherVaArg ap(methodID, args);
1753 jni_invoke_static(env, &jvalue, nullptr, JNI_STATIC, methodID, &ap, CHECK);
1754 va_end(args);
1755 JNI_END
1756
1757
1758 JNI_ENTRY(void, jni_CallStaticVoidMethodV(JNIEnv *env, jclass cls, jmethodID methodID, va_list args))
1759 HOTSPOT_JNI_CALLSTATICVOIDMETHODV_ENTRY(env, cls, (uintptr_t) methodID);
1760 DT_VOID_RETURN_MARK(CallStaticVoidMethodV);
1761
1762 JavaValue jvalue(T_VOID);
1763 JNI_ArgumentPusherVaArg ap(methodID, args);
1764 jni_invoke_static(env, &jvalue, nullptr, JNI_STATIC, methodID, &ap, CHECK);
1765 JNI_END
1766
1767
1768 JNI_ENTRY(void, jni_CallStaticVoidMethodA(JNIEnv *env, jclass cls, jmethodID methodID, const jvalue *args))
1769 HOTSPOT_JNI_CALLSTATICVOIDMETHODA_ENTRY(env, cls, (uintptr_t) methodID);
1770 DT_VOID_RETURN_MARK(CallStaticVoidMethodA);
1771
1772 JavaValue jvalue(T_VOID);
1773 JNI_ArgumentPusherArray ap(methodID, args);
1774 jni_invoke_static(env, &jvalue, nullptr, JNI_STATIC, methodID, &ap, CHECK);
1775 JNI_END
1776
1777
1778 //
1779 // Accessing Fields
1780 //
1781
1782
1783 DT_RETURN_MARK_DECL(GetFieldID, jfieldID
1784 , HOTSPOT_JNI_GETFIELDID_RETURN((uintptr_t)_ret_ref));
1785
1786 JNI_ENTRY(jfieldID, jni_GetFieldID(JNIEnv *env, jclass clazz,
1787 const char *name, const char *sig))
1788 HOTSPOT_JNI_GETFIELDID_ENTRY(env, clazz, (char *) name, (char *) sig);
1789 jfieldID ret = nullptr;
1790 DT_RETURN_MARK(GetFieldID, jfieldID, (const jfieldID&)ret);
1791
1792 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz));
1793
1794 // The class should have been loaded (we have an instance of the class
1795 // passed in) so the field and signature should already be in the symbol
1796 // table. If they're not there, the field doesn't exist.
1797 TempNewSymbol fieldname = SymbolTable::probe(name, (int)strlen(name));
1798 TempNewSymbol signame = SymbolTable::probe(sig, (int)strlen(sig));
1799 if (fieldname == nullptr || signame == nullptr) {
1800 ResourceMark rm;
1801 THROW_MSG_NULL(vmSymbols::java_lang_NoSuchFieldError(), err_msg("%s.%s %s", k->external_name(), name, sig));
1802 }
1803
1804 // Make sure class is initialized before handing id's out to fields
1805 k->initialize(CHECK_NULL);
1806
1807 fieldDescriptor fd;
1808 if (!k->is_instance_klass() ||
1809 !InstanceKlass::cast(k)->find_field(fieldname, signame, false, &fd)) {
1810 ResourceMark rm;
1811 THROW_MSG_NULL(vmSymbols::java_lang_NoSuchFieldError(), err_msg("%s.%s %s", k->external_name(), name, sig));
1812 }
1813
1814 // A jfieldID for a non-static field is simply the offset of the field within the instanceOop
1815 // It may also have hash bits for k, if VerifyJNIFields is turned on.
1816 ret = jfieldIDWorkaround::to_instance_jfieldID(k, fd.offset(), fd.is_flat());
1817 return ret;
1818 JNI_END
1819
1820
1821 JNI_ENTRY(jobject, jni_GetObjectField(JNIEnv *env, jobject obj, jfieldID fieldID))
1822 HOTSPOT_JNI_GETOBJECTFIELD_ENTRY(env, obj, (uintptr_t) fieldID);
1823 oop o = JNIHandles::resolve_non_null(obj);
1824 Klass* k = o->klass();
1825 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID);
1826 oop res = nullptr;
1827 // Keep JVMTI addition small and only check enabled flag here.
1828 // jni_GetField_probe() assumes that is okay to create handles.
1829 if (JvmtiExport::should_post_field_access()) {
1830 o = JvmtiExport::jni_GetField_probe(thread, obj, o, k, fieldID, false);
1831 }
1832 if (!jfieldIDWorkaround::is_flat_jfieldID(fieldID)) {
1833 res = HeapAccess<ON_UNKNOWN_OOP_REF>::oop_load_at(o, offset);
1834 } else {
1835 assert(k->is_instance_klass(), "Only instance can have flat fields");
1836 InstanceKlass* ik = InstanceKlass::cast(k);
1837 fieldDescriptor fd;
1838 ik->find_field_from_offset(offset, false, &fd); // performance bottleneck
1839 InstanceKlass* holder = fd.field_holder();
1840 InlineLayoutInfo* li = holder->inline_layout_info_adr(fd.index());
1841 InlineKlass* field_vklass = li->klass();
1842 res = field_vklass->read_flat_field(o, ik->field_offset(fd.index()), li->kind(), CHECK_NULL);
1843 }
1844 jobject ret = JNIHandles::make_local(THREAD, res);
1845 HOTSPOT_JNI_GETOBJECTFIELD_RETURN(ret);
1846 return ret;
1847 JNI_END
1848
1849
1850
1851 #define DEFINE_GETFIELD(Return,Fieldname,Result \
1852 , EntryProbe, ReturnProbe) \
1853 \
1854 DT_RETURN_MARK_DECL_FOR(Result, Get##Result##Field, Return \
1855 , ReturnProbe); \
1856 \
1857 JNI_ENTRY_NO_PRESERVE(Return, jni_Get##Result##Field(JNIEnv *env, jobject obj, jfieldID fieldID)) \
1858 \
1859 EntryProbe; \
1860 Return ret = 0;\
1861 DT_RETURN_MARK_FOR(Result, Get##Result##Field, Return, (const Return&)ret);\
1862 \
1863 oop o = JNIHandles::resolve_non_null(obj); \
1864 Klass* k = o->klass(); \
1865 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID); \
1866 /* Keep JVMTI addition small and only check enabled flag here. */ \
1867 if (JvmtiExport::should_post_field_access()) { \
1868 o = JvmtiExport::jni_GetField_probe(thread, obj, o, k, fieldID, false); \
1869 } \
1870 ret = o->Fieldname##_field(offset); \
1871 return ret; \
1872 JNI_END
1873
1874 DEFINE_GETFIELD(jboolean, bool, Boolean
1875 , HOTSPOT_JNI_GETBOOLEANFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
1876 HOTSPOT_JNI_GETBOOLEANFIELD_RETURN(_ret_ref))
1877 DEFINE_GETFIELD(jbyte, byte, Byte
1878 , HOTSPOT_JNI_GETBYTEFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
1879 HOTSPOT_JNI_GETBYTEFIELD_RETURN(_ret_ref))
1880 DEFINE_GETFIELD(jchar, char, Char
1881 , HOTSPOT_JNI_GETCHARFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
1882 HOTSPOT_JNI_GETCHARFIELD_RETURN(_ret_ref))
1883 DEFINE_GETFIELD(jshort, short, Short
1884 , HOTSPOT_JNI_GETSHORTFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
1885 HOTSPOT_JNI_GETSHORTFIELD_RETURN(_ret_ref))
1886 DEFINE_GETFIELD(jint, int, Int
1887 , HOTSPOT_JNI_GETINTFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
1888 HOTSPOT_JNI_GETINTFIELD_RETURN(_ret_ref))
1889 DEFINE_GETFIELD(jlong, long, Long
1890 , HOTSPOT_JNI_GETLONGFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
1891 HOTSPOT_JNI_GETLONGFIELD_RETURN(_ret_ref))
1892 // Float and double probes don't return value because dtrace doesn't currently support it
1893 DEFINE_GETFIELD(jfloat, float, Float
1894 , HOTSPOT_JNI_GETFLOATFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
1895 HOTSPOT_JNI_GETFLOATFIELD_RETURN())
1896 DEFINE_GETFIELD(jdouble, double, Double
1897 , HOTSPOT_JNI_GETDOUBLEFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
1898 HOTSPOT_JNI_GETDOUBLEFIELD_RETURN())
1899
1900 address jni_GetBooleanField_addr() {
1901 return (address)jni_GetBooleanField;
1902 }
1903 address jni_GetByteField_addr() {
1904 return (address)jni_GetByteField;
1905 }
1906 address jni_GetCharField_addr() {
1907 return (address)jni_GetCharField;
1908 }
1909 address jni_GetShortField_addr() {
1910 return (address)jni_GetShortField;
1911 }
1912 address jni_GetIntField_addr() {
1913 return (address)jni_GetIntField;
1914 }
1915 address jni_GetLongField_addr() {
1916 return (address)jni_GetLongField;
1917 }
1918 address jni_GetFloatField_addr() {
1919 return (address)jni_GetFloatField;
1920 }
1921 address jni_GetDoubleField_addr() {
1922 return (address)jni_GetDoubleField;
1923 }
1924
1925 JNI_ENTRY_NO_PRESERVE(void, jni_SetObjectField(JNIEnv *env, jobject obj, jfieldID fieldID, jobject value))
1926 HOTSPOT_JNI_SETOBJECTFIELD_ENTRY(env, obj, (uintptr_t) fieldID, value);
1927 oop o = JNIHandles::resolve_non_null(obj);
1928 Klass* k = o->klass();
1929 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID);
1930 // Keep JVMTI addition small and only check enabled flag here.
1931 if (JvmtiExport::should_post_field_modification()) {
1932 jvalue field_value;
1933 field_value.l = value;
1934 o = JvmtiExport::jni_SetField_probe(thread, obj, o, k, fieldID, false, JVM_SIGNATURE_CLASS, (jvalue *)&field_value);
1935 }
1936 if (!jfieldIDWorkaround::is_flat_jfieldID(fieldID)) {
1937 HeapAccess<ON_UNKNOWN_OOP_REF>::oop_store_at(o, offset, JNIHandles::resolve(value));
1938 } else {
1939 assert(k->is_instance_klass(), "Only instances can have flat fields");
1940 InstanceKlass* ik = InstanceKlass::cast(k);
1941 fieldDescriptor fd;
1942 ik->find_field_from_offset(offset, false, &fd);
1943 InstanceKlass* holder = fd.field_holder();
1944 InlineLayoutInfo* li = holder->inline_layout_info_adr(fd.index());
1945 InlineKlass* vklass = li->klass();
1946 oop v = JNIHandles::resolve_non_null(value);
1947 vklass->write_flat_field(o, offset, v, fd.is_null_free_inline_type(), li->kind(), CHECK);
1948 }
1949 HOTSPOT_JNI_SETOBJECTFIELD_RETURN();
1950 JNI_END
1951
1952 // TODO: make this a template
1953
1954 #define DEFINE_SETFIELD(Argument,Fieldname,Result,SigType,unionType \
1955 , EntryProbe, ReturnProbe) \
1956 \
1957 JNI_ENTRY_NO_PRESERVE(void, jni_Set##Result##Field(JNIEnv *env, jobject obj, jfieldID fieldID, Argument value)) \
1958 \
1959 EntryProbe; \
1960 \
1961 oop o = JNIHandles::resolve_non_null(obj); \
1962 Klass* k = o->klass(); \
1963 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID); \
1964 /* Keep JVMTI addition small and only check enabled flag here. */ \
1965 if (JvmtiExport::should_post_field_modification()) { \
1966 jvalue field_value; \
1967 field_value.unionType = value; \
1968 o = JvmtiExport::jni_SetField_probe(thread, obj, o, k, fieldID, false, SigType, (jvalue *)&field_value); \
1969 } \
1970 o->Fieldname##_field_put(offset, value); \
1971 ReturnProbe; \
1972 JNI_END
1973
1974 DEFINE_SETFIELD(jboolean, bool, Boolean, JVM_SIGNATURE_BOOLEAN, z
1975 , HOTSPOT_JNI_SETBOOLEANFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value),
1976 HOTSPOT_JNI_SETBOOLEANFIELD_RETURN())
1977 DEFINE_SETFIELD(jbyte, byte, Byte, JVM_SIGNATURE_BYTE, b
1978 , HOTSPOT_JNI_SETBYTEFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value),
1979 HOTSPOT_JNI_SETBYTEFIELD_RETURN())
1980 DEFINE_SETFIELD(jchar, char, Char, JVM_SIGNATURE_CHAR, c
1981 , HOTSPOT_JNI_SETCHARFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value),
1982 HOTSPOT_JNI_SETCHARFIELD_RETURN())
1983 DEFINE_SETFIELD(jshort, short, Short, JVM_SIGNATURE_SHORT, s
1984 , HOTSPOT_JNI_SETSHORTFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value),
1985 HOTSPOT_JNI_SETSHORTFIELD_RETURN())
1986 DEFINE_SETFIELD(jint, int, Int, JVM_SIGNATURE_INT, i
1987 , HOTSPOT_JNI_SETINTFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value),
1988 HOTSPOT_JNI_SETINTFIELD_RETURN())
1989 DEFINE_SETFIELD(jlong, long, Long, JVM_SIGNATURE_LONG, j
1990 , HOTSPOT_JNI_SETLONGFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value),
1991 HOTSPOT_JNI_SETLONGFIELD_RETURN())
1992 // Float and double probes don't return value because dtrace doesn't currently support it
1993 DEFINE_SETFIELD(jfloat, float, Float, JVM_SIGNATURE_FLOAT, f
1994 , HOTSPOT_JNI_SETFLOATFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
1995 HOTSPOT_JNI_SETFLOATFIELD_RETURN())
1996 DEFINE_SETFIELD(jdouble, double, Double, JVM_SIGNATURE_DOUBLE, d
1997 , HOTSPOT_JNI_SETDOUBLEFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
1998 HOTSPOT_JNI_SETDOUBLEFIELD_RETURN())
1999
2000 DT_RETURN_MARK_DECL(ToReflectedField, jobject
2001 , HOTSPOT_JNI_TOREFLECTEDFIELD_RETURN(_ret_ref));
2002
2003 JNI_ENTRY(jobject, jni_ToReflectedField(JNIEnv *env, jclass cls, jfieldID fieldID, jboolean isStatic))
2004 HOTSPOT_JNI_TOREFLECTEDFIELD_ENTRY(env, cls, (uintptr_t) fieldID, isStatic);
2005 jobject ret = nullptr;
2006 DT_RETURN_MARK(ToReflectedField, jobject, (const jobject&)ret);
2007
2008 fieldDescriptor fd;
2009 bool found = false;
2010 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2011
2012 assert(jfieldIDWorkaround::is_static_jfieldID(fieldID) == (isStatic != 0), "invalid fieldID");
2013
2014 if (isStatic) {
2015 // Static field. The fieldID a JNIid specifying the field holder and the offset within the Klass*.
2016 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID);
2017 assert(id->is_static_field_id(), "invalid static field id");
2018 found = id->find_local_field(&fd);
2019 } else {
2020 // Non-static field. The fieldID is really the offset of the field within the instanceOop.
2021 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID);
2022 found = InstanceKlass::cast(k)->find_field_from_offset(offset, false, &fd);
2023 }
2024 assert(found, "bad fieldID passed into jni_ToReflectedField");
2025 oop reflected = Reflection::new_field(&fd, CHECK_NULL);
2026 ret = JNIHandles::make_local(THREAD, reflected);
2027 return ret;
2028 JNI_END
2029
2030
2031 //
2032 // Accessing Static Fields
2033 //
2034 DT_RETURN_MARK_DECL(GetStaticFieldID, jfieldID
2035 , HOTSPOT_JNI_GETSTATICFIELDID_RETURN((uintptr_t)_ret_ref));
2036
2037 JNI_ENTRY(jfieldID, jni_GetStaticFieldID(JNIEnv *env, jclass clazz,
2038 const char *name, const char *sig))
2039 HOTSPOT_JNI_GETSTATICFIELDID_ENTRY(env, clazz, (char *) name, (char *) sig);
2040 jfieldID ret = nullptr;
2041 DT_RETURN_MARK(GetStaticFieldID, jfieldID, (const jfieldID&)ret);
2042
2043 // The class should have been loaded (we have an instance of the class
2044 // passed in) so the field and signature should already be in the symbol
2045 // table. If they're not there, the field doesn't exist.
2046 TempNewSymbol fieldname = SymbolTable::probe(name, (int)strlen(name));
2047 TempNewSymbol signame = SymbolTable::probe(sig, (int)strlen(sig));
2048 if (fieldname == nullptr || signame == nullptr) {
2049 THROW_MSG_NULL(vmSymbols::java_lang_NoSuchFieldError(), (char*) name);
2050 }
2051 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz));
2052 // Make sure class is initialized before handing id's out to static fields
2053 k->initialize(CHECK_NULL);
2054
2055 fieldDescriptor fd;
2056 if (!k->is_instance_klass() ||
2057 !InstanceKlass::cast(k)->find_field(fieldname, signame, true, &fd)) {
2058 THROW_MSG_NULL(vmSymbols::java_lang_NoSuchFieldError(), (char*) name);
2059 }
2060
2061 // A jfieldID for a static field is a JNIid specifying the field holder and the offset within the Klass*
2062 JNIid* id = fd.field_holder()->jni_id_for(fd.offset());
2063 debug_only(id->set_is_static_field_id();)
2064
2065 debug_only(id->verify(fd.field_holder()));
2066
2067 ret = jfieldIDWorkaround::to_static_jfieldID(id);
2068 return ret;
2069 JNI_END
2070
2071
2072 JNI_ENTRY(jobject, jni_GetStaticObjectField(JNIEnv *env, jclass clazz, jfieldID fieldID))
2073 HOTSPOT_JNI_GETSTATICOBJECTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID);
2074 #if INCLUDE_JNI_CHECK
2075 DEBUG_ONLY(Klass* param_k = jniCheck::validate_class(thread, clazz);)
2076 #endif // INCLUDE_JNI_CHECK
2077 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID);
2078 assert(id->is_static_field_id(), "invalid static field id");
2079 // Keep JVMTI addition small and only check enabled flag here.
2080 // jni_GetField_probe() assumes that is okay to create handles.
2081 if (JvmtiExport::should_post_field_access()) {
2082 JvmtiExport::jni_GetField_probe(thread, nullptr, nullptr, id->holder(), fieldID, true);
2083 }
2084 jobject ret = JNIHandles::make_local(THREAD, id->holder()->java_mirror()->obj_field(id->offset()));
2085 HOTSPOT_JNI_GETSTATICOBJECTFIELD_RETURN(ret);
2086 return ret;
2087 JNI_END
2088
2089
2090 #define DEFINE_GETSTATICFIELD(Return,Fieldname,Result \
2091 , EntryProbe, ReturnProbe) \
2092 \
2093 DT_RETURN_MARK_DECL_FOR(Result, GetStatic##Result##Field, Return \
2094 , ReturnProbe); \
2095 \
2096 JNI_ENTRY(Return, jni_GetStatic##Result##Field(JNIEnv *env, jclass clazz, jfieldID fieldID)) \
2097 EntryProbe; \
2098 Return ret = 0;\
2099 DT_RETURN_MARK_FOR(Result, GetStatic##Result##Field, Return, \
2100 (const Return&)ret);\
2101 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID); \
2102 assert(id->is_static_field_id(), "invalid static field id"); \
2103 /* Keep JVMTI addition small and only check enabled flag here. */ \
2104 /* jni_GetField_probe() assumes that is okay to create handles. */ \
2105 if (JvmtiExport::should_post_field_access()) { \
2106 JvmtiExport::jni_GetField_probe(thread, nullptr, nullptr, id->holder(), fieldID, true); \
2107 } \
2108 ret = id->holder()->java_mirror()-> Fieldname##_field (id->offset()); \
2109 return ret;\
2110 JNI_END
2111
2112 DEFINE_GETSTATICFIELD(jboolean, bool, Boolean
2113 , HOTSPOT_JNI_GETSTATICBOOLEANFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICBOOLEANFIELD_RETURN(_ret_ref))
2114 DEFINE_GETSTATICFIELD(jbyte, byte, Byte
2115 , HOTSPOT_JNI_GETSTATICBYTEFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICBYTEFIELD_RETURN(_ret_ref) )
2116 DEFINE_GETSTATICFIELD(jchar, char, Char
2117 , HOTSPOT_JNI_GETSTATICCHARFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICCHARFIELD_RETURN(_ret_ref) )
2118 DEFINE_GETSTATICFIELD(jshort, short, Short
2119 , HOTSPOT_JNI_GETSTATICSHORTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICSHORTFIELD_RETURN(_ret_ref) )
2120 DEFINE_GETSTATICFIELD(jint, int, Int
2121 , HOTSPOT_JNI_GETSTATICINTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICINTFIELD_RETURN(_ret_ref) )
2122 DEFINE_GETSTATICFIELD(jlong, long, Long
2123 , HOTSPOT_JNI_GETSTATICLONGFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICLONGFIELD_RETURN(_ret_ref) )
2124 // Float and double probes don't return value because dtrace doesn't currently support it
2125 DEFINE_GETSTATICFIELD(jfloat, float, Float
2126 , HOTSPOT_JNI_GETSTATICFLOATFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICFLOATFIELD_RETURN() )
2127 DEFINE_GETSTATICFIELD(jdouble, double, Double
2128 , HOTSPOT_JNI_GETSTATICDOUBLEFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICDOUBLEFIELD_RETURN() )
2129
2130 JNI_ENTRY(void, jni_SetStaticObjectField(JNIEnv *env, jclass clazz, jfieldID fieldID, jobject value))
2131 HOTSPOT_JNI_SETSTATICOBJECTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value);
2132 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID);
2133 assert(id->is_static_field_id(), "invalid static field id");
2134 // Keep JVMTI addition small and only check enabled flag here.
2135 // jni_SetField_probe() assumes that is okay to create handles.
2136 if (JvmtiExport::should_post_field_modification()) {
2137 jvalue field_value;
2138 field_value.l = value;
2139 JvmtiExport::jni_SetField_probe(thread, nullptr, nullptr, id->holder(), fieldID, true, JVM_SIGNATURE_CLASS, (jvalue *)&field_value);
2140 }
2141 id->holder()->java_mirror()->obj_field_put(id->offset(), JNIHandles::resolve(value));
2142 HOTSPOT_JNI_SETSTATICOBJECTFIELD_RETURN();
2143 JNI_END
2144
2145
2146
2147 #define DEFINE_SETSTATICFIELD(Argument,Fieldname,Result,SigType,unionType \
2148 , EntryProbe, ReturnProbe) \
2149 \
2150 JNI_ENTRY(void, jni_SetStatic##Result##Field(JNIEnv *env, jclass clazz, jfieldID fieldID, Argument value)) \
2151 EntryProbe; \
2152 \
2153 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID); \
2154 assert(id->is_static_field_id(), "invalid static field id"); \
2155 /* Keep JVMTI addition small and only check enabled flag here. */ \
2156 /* jni_SetField_probe() assumes that is okay to create handles. */ \
2157 if (JvmtiExport::should_post_field_modification()) { \
2158 jvalue field_value; \
2159 field_value.unionType = value; \
2160 JvmtiExport::jni_SetField_probe(thread, nullptr, nullptr, id->holder(), fieldID, true, SigType, (jvalue *)&field_value); \
2161 } \
2162 id->holder()->java_mirror()-> Fieldname##_field_put (id->offset(), value); \
2163 ReturnProbe;\
2164 JNI_END
2165
2166 DEFINE_SETSTATICFIELD(jboolean, bool, Boolean, JVM_SIGNATURE_BOOLEAN, z
2167 , HOTSPOT_JNI_SETSTATICBOOLEANFIELD_ENTRY(env, clazz, (uintptr_t)fieldID, value),
2168 HOTSPOT_JNI_SETSTATICBOOLEANFIELD_RETURN())
2169 DEFINE_SETSTATICFIELD(jbyte, byte, Byte, JVM_SIGNATURE_BYTE, b
2170 , HOTSPOT_JNI_SETSTATICBYTEFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value),
2171 HOTSPOT_JNI_SETSTATICBYTEFIELD_RETURN())
2172 DEFINE_SETSTATICFIELD(jchar, char, Char, JVM_SIGNATURE_CHAR, c
2173 , HOTSPOT_JNI_SETSTATICCHARFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value),
2174 HOTSPOT_JNI_SETSTATICCHARFIELD_RETURN())
2175 DEFINE_SETSTATICFIELD(jshort, short, Short, JVM_SIGNATURE_SHORT, s
2176 , HOTSPOT_JNI_SETSTATICSHORTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value),
2177 HOTSPOT_JNI_SETSTATICSHORTFIELD_RETURN())
2178 DEFINE_SETSTATICFIELD(jint, int, Int, JVM_SIGNATURE_INT, i
2179 , HOTSPOT_JNI_SETSTATICINTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value),
2180 HOTSPOT_JNI_SETSTATICINTFIELD_RETURN())
2181 DEFINE_SETSTATICFIELD(jlong, long, Long, JVM_SIGNATURE_LONG, j
2182 , HOTSPOT_JNI_SETSTATICLONGFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value),
2183 HOTSPOT_JNI_SETSTATICLONGFIELD_RETURN())
2184 // Float and double probes don't return value because dtrace doesn't currently support it
2185 DEFINE_SETSTATICFIELD(jfloat, float, Float, JVM_SIGNATURE_FLOAT, f
2186 , HOTSPOT_JNI_SETSTATICFLOATFIELD_ENTRY(env, clazz, (uintptr_t) fieldID),
2187 HOTSPOT_JNI_SETSTATICFLOATFIELD_RETURN())
2188 DEFINE_SETSTATICFIELD(jdouble, double, Double, JVM_SIGNATURE_DOUBLE, d
2189 , HOTSPOT_JNI_SETSTATICDOUBLEFIELD_ENTRY(env, clazz, (uintptr_t) fieldID),
2190 HOTSPOT_JNI_SETSTATICDOUBLEFIELD_RETURN())
2191
2192 //
2193 // String Operations
2194 //
2195
2196 // Unicode Interface
2197
2198 DT_RETURN_MARK_DECL(NewString, jstring
2199 , HOTSPOT_JNI_NEWSTRING_RETURN(_ret_ref));
2200
2201 JNI_ENTRY(jstring, jni_NewString(JNIEnv *env, const jchar *unicodeChars, jsize len))
2202 HOTSPOT_JNI_NEWSTRING_ENTRY(env, (uint16_t *) unicodeChars, len);
2203 jstring ret = nullptr;
2204 DT_RETURN_MARK(NewString, jstring, (const jstring&)ret);
2205 oop string=java_lang_String::create_oop_from_unicode((jchar*) unicodeChars, len, CHECK_NULL);
2206 ret = (jstring) JNIHandles::make_local(THREAD, string);
2207 return ret;
2208 JNI_END
2209
2210
2211 JNI_ENTRY_NO_PRESERVE(jsize, jni_GetStringLength(JNIEnv *env, jstring string))
2212 HOTSPOT_JNI_GETSTRINGLENGTH_ENTRY(env, string);
2213 jsize ret = 0;
2214 oop s = JNIHandles::resolve_non_null(string);
2215 ret = java_lang_String::length(s);
2216 HOTSPOT_JNI_GETSTRINGLENGTH_RETURN(ret);
2217 return ret;
2218 JNI_END
2219
2220
2221 JNI_ENTRY_NO_PRESERVE(const jchar*, jni_GetStringChars(
2222 JNIEnv *env, jstring string, jboolean *isCopy))
2223 HOTSPOT_JNI_GETSTRINGCHARS_ENTRY(env, string, (uintptr_t *) isCopy);
2224 jchar* buf = nullptr;
2225 oop s = JNIHandles::resolve_non_null(string);
2226 typeArrayOop s_value = java_lang_String::value(s);
2227 if (s_value != nullptr) {
2228 int s_len = java_lang_String::length(s, s_value);
2229 bool is_latin1 = java_lang_String::is_latin1(s);
2230 buf = NEW_C_HEAP_ARRAY_RETURN_NULL(jchar, s_len + 1, mtInternal); // add one for zero termination
2231 /* JNI Specification states return null on OOM */
2232 if (buf != nullptr) {
2233 if (s_len > 0) {
2234 if (!is_latin1) {
2235 ArrayAccess<>::arraycopy_to_native(s_value, (size_t) typeArrayOopDesc::element_offset<jchar>(0),
2236 buf, s_len);
2237 } else {
2238 for (int i = 0; i < s_len; i++) {
2239 buf[i] = ((jchar) s_value->byte_at(i)) & 0xff;
2240 }
2241 }
2242 }
2243 buf[s_len] = 0;
2244 //%note jni_5
2245 if (isCopy != nullptr) {
2246 *isCopy = JNI_TRUE;
2247 }
2248 }
2249 }
2250 HOTSPOT_JNI_GETSTRINGCHARS_RETURN(buf);
2251 return buf;
2252 JNI_END
2253
2254
2255 JNI_ENTRY_NO_PRESERVE(void, jni_ReleaseStringChars(JNIEnv *env, jstring str, const jchar *chars))
2256 HOTSPOT_JNI_RELEASESTRINGCHARS_ENTRY(env, str, (uint16_t *) chars);
2257 //%note jni_6
2258 if (chars != nullptr) {
2259 // Since String objects are supposed to be immutable, don't copy any
2260 // new data back. A bad user will have to go after the char array.
2261 FreeHeap((void*) chars);
2262 }
2263 HOTSPOT_JNI_RELEASESTRINGCHARS_RETURN();
2264 JNI_END
2265
2266
2267 // UTF Interface
2268
2269 DT_RETURN_MARK_DECL(NewStringUTF, jstring
2270 , HOTSPOT_JNI_NEWSTRINGUTF_RETURN(_ret_ref));
2271
2272 JNI_ENTRY(jstring, jni_NewStringUTF(JNIEnv *env, const char *bytes))
2273 HOTSPOT_JNI_NEWSTRINGUTF_ENTRY(env, (char *) bytes);
2274 jstring ret;
2275 DT_RETURN_MARK(NewStringUTF, jstring, (const jstring&)ret);
2276
2277 oop result = java_lang_String::create_oop_from_str((char*) bytes, CHECK_NULL);
2278 ret = (jstring) JNIHandles::make_local(THREAD, result);
2279 return ret;
2280 JNI_END
2281
2282
2283 JNI_ENTRY(jsize, jni_GetStringUTFLength(JNIEnv *env, jstring string))
2284 HOTSPOT_JNI_GETSTRINGUTFLENGTH_ENTRY(env, string);
2285 oop java_string = JNIHandles::resolve_non_null(string);
2286 jsize ret = java_lang_String::utf8_length_as_int(java_string);
2287 HOTSPOT_JNI_GETSTRINGUTFLENGTH_RETURN(ret);
2288 return ret;
2289 JNI_END
2290
2291 JNI_ENTRY(jlong, jni_GetStringUTFLengthAsLong(JNIEnv *env, jstring string))
2292 HOTSPOT_JNI_GETSTRINGUTFLENGTHASLONG_ENTRY(env, string);
2293 oop java_string = JNIHandles::resolve_non_null(string);
2294 size_t ret = java_lang_String::utf8_length(java_string);
2295 HOTSPOT_JNI_GETSTRINGUTFLENGTHASLONG_RETURN(ret);
2296 return checked_cast<jlong>(ret);
2297 JNI_END
2298
2299
2300 JNI_ENTRY(const char*, jni_GetStringUTFChars(JNIEnv *env, jstring string, jboolean *isCopy))
2301 HOTSPOT_JNI_GETSTRINGUTFCHARS_ENTRY(env, string, (uintptr_t *) isCopy);
2302 char* result = nullptr;
2303 oop java_string = JNIHandles::resolve_non_null(string);
2304 typeArrayOop s_value = java_lang_String::value(java_string);
2305 if (s_value != nullptr) {
2306 size_t length = java_lang_String::utf8_length(java_string, s_value);
2307 // JNI Specification states return null on OOM.
2308 // The resulting sequence doesn't have to be NUL-terminated but we do.
2309 result = AllocateHeap(length + 1, mtInternal, AllocFailStrategy::RETURN_NULL);
2310 if (result != nullptr) {
2311 java_lang_String::as_utf8_string(java_string, s_value, result, length + 1);
2312 if (isCopy != nullptr) {
2313 *isCopy = JNI_TRUE;
2314 }
2315 }
2316 }
2317 HOTSPOT_JNI_GETSTRINGUTFCHARS_RETURN(result);
2318 return result;
2319 JNI_END
2320
2321
2322 JNI_LEAF(void, jni_ReleaseStringUTFChars(JNIEnv *env, jstring str, const char *chars))
2323 HOTSPOT_JNI_RELEASESTRINGUTFCHARS_ENTRY(env, str, (char *) chars);
2324 if (chars != nullptr) {
2325 FreeHeap((char*) chars);
2326 }
2327 HOTSPOT_JNI_RELEASESTRINGUTFCHARS_RETURN();
2328 JNI_END
2329
2330
2331 JNI_ENTRY_NO_PRESERVE(jsize, jni_GetArrayLength(JNIEnv *env, jarray array))
2332 HOTSPOT_JNI_GETARRAYLENGTH_ENTRY(env, array);
2333 arrayOop a = arrayOop(JNIHandles::resolve_non_null(array));
2334 assert(a->is_array(), "must be array");
2335 jsize ret = a->length();
2336 HOTSPOT_JNI_GETARRAYLENGTH_RETURN(ret);
2337 return ret;
2338 JNI_END
2339
2340
2341 //
2342 // Object Array Operations
2343 //
2344
2345 DT_RETURN_MARK_DECL(NewObjectArray, jobjectArray
2346 , HOTSPOT_JNI_NEWOBJECTARRAY_RETURN(_ret_ref));
2347
2348 JNI_ENTRY(jobjectArray, jni_NewObjectArray(JNIEnv *env, jsize length, jclass elementClass, jobject initialElement))
2349 HOTSPOT_JNI_NEWOBJECTARRAY_ENTRY(env, length, elementClass, initialElement);
2350 jobjectArray ret = nullptr;
2351 DT_RETURN_MARK(NewObjectArray, jobjectArray, (const jobjectArray&)ret);
2352 Klass* ek = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(elementClass));
2353 Klass* ak = ek->array_klass(CHECK_NULL);
2354 ObjArrayKlass::cast(ak)->initialize(CHECK_NULL);
2355 objArrayOop result = ObjArrayKlass::cast(ak)->allocate(length, CHECK_NULL);
2356 oop initial_value = JNIHandles::resolve(initialElement);
2357 if (initial_value != nullptr) { // array already initialized with null
2358 for (int index = 0; index < length; index++) {
2359 result->obj_at_put(index, initial_value);
2360 }
2361 }
2362 ret = (jobjectArray) JNIHandles::make_local(THREAD, result);
2363 return ret;
2364 JNI_END
2365
2366 DT_RETURN_MARK_DECL(GetObjectArrayElement, jobject
2367 , HOTSPOT_JNI_GETOBJECTARRAYELEMENT_RETURN(_ret_ref));
2368
2369 JNI_ENTRY(jobject, jni_GetObjectArrayElement(JNIEnv *env, jobjectArray array, jsize index))
2370 HOTSPOT_JNI_GETOBJECTARRAYELEMENT_ENTRY(env, array, index);
2371 jobject ret = nullptr;
2372 DT_RETURN_MARK(GetObjectArrayElement, jobject, (const jobject&)ret);
2373 oop res = nullptr;
2374 arrayOop arr((arrayOop)JNIHandles::resolve_non_null(array));
2375 if (arr->is_within_bounds(index)) {
2376 if (arr->is_flatArray()) {
2377 flatArrayOop a = flatArrayOop(JNIHandles::resolve_non_null(array));
2378 flatArrayHandle vah(thread, a);
2379 res = flatArrayOopDesc::value_alloc_copy_from_index(vah, index, CHECK_NULL);
2380 assert(res != nullptr, "Must be set in one of two paths above");
2381 } else {
2382 assert(arr->is_objArray(), "If not a valueArray. must be an objArray");
2383 objArrayOop a = objArrayOop(JNIHandles::resolve_non_null(array));
2384 res = a->obj_at(index);
2385 }
2386 } else {
2387 ResourceMark rm(THREAD);
2388 stringStream ss;
2389 ss.print("Index %d out of bounds for length %d", index,arr->length());
2390 THROW_MSG_NULL(vmSymbols::java_lang_ArrayIndexOutOfBoundsException(), ss.as_string());
2391 }
2392 ret = JNIHandles::make_local(THREAD, res);
2393 return ret;
2394 JNI_END
2395
2396 DT_VOID_RETURN_MARK_DECL(SetObjectArrayElement
2397 , HOTSPOT_JNI_SETOBJECTARRAYELEMENT_RETURN());
2398
2399 JNI_ENTRY(void, jni_SetObjectArrayElement(JNIEnv *env, jobjectArray array, jsize index, jobject value))
2400 HOTSPOT_JNI_SETOBJECTARRAYELEMENT_ENTRY(env, array, index, value);
2401 DT_VOID_RETURN_MARK(SetObjectArrayElement);
2402
2403 bool oob = false;
2404 int length = -1;
2405 oop res = nullptr;
2406 arrayOop arr((arrayOop)JNIHandles::resolve_non_null(array));
2407 if (arr->is_within_bounds(index)) {
2408 if (arr->is_flatArray()) {
2409 flatArrayOop a = flatArrayOop(JNIHandles::resolve_non_null(array));
2410 oop v = JNIHandles::resolve(value);
2411 FlatArrayKlass* vaklass = FlatArrayKlass::cast(a->klass());
2412 InlineKlass* element_vklass = vaklass->element_klass();
2413 if (v != nullptr && v->is_a(element_vklass)) {
2414 a->value_copy_to_index(v, index, LayoutKind::PAYLOAD); // Temporary hack for the transition
2415 } else {
2416 ResourceMark rm(THREAD);
2417 stringStream ss;
2418 Klass *kl = FlatArrayKlass::cast(a->klass());
2419 ss.print("type mismatch: can not store %s to %s[%d]",
2420 v->klass()->external_name(),
2421 kl->external_name(),
2422 index);
2423 for (int dims = ArrayKlass::cast(a->klass())->dimension(); dims > 1; --dims) {
2424 ss.print("[]");
2425 }
2426 THROW_MSG(vmSymbols::java_lang_ArrayStoreException(), ss.as_string());
2427 }
2428 } else {
2429 assert(arr->is_objArray(), "If not a valueArray. must be an objArray");
2430 objArrayOop a = objArrayOop(JNIHandles::resolve_non_null(array));
2431 oop v = JNIHandles::resolve(value);
2432 if (v == nullptr || v->is_a(ObjArrayKlass::cast(a->klass())->element_klass())) {
2433 a->obj_at_put(index, v);
2434 } else {
2435 ResourceMark rm(THREAD);
2436 stringStream ss;
2437 Klass *bottom_kl = ObjArrayKlass::cast(a->klass())->bottom_klass();
2438 ss.print("type mismatch: can not store %s to %s[%d]",
2439 v->klass()->external_name(),
2440 bottom_kl->is_typeArray_klass() ? type2name_tab[ArrayKlass::cast(bottom_kl)->element_type()] : bottom_kl->external_name(),
2441 index);
2442 for (int dims = ArrayKlass::cast(a->klass())->dimension(); dims > 1; --dims) {
2443 ss.print("[]");
2444 }
2445 THROW_MSG(vmSymbols::java_lang_ArrayStoreException(), ss.as_string());
2446 }
2447 }
2448 } else {
2449 ResourceMark rm(THREAD);
2450 stringStream ss;
2451 ss.print("Index %d out of bounds for length %d", index, arr->length());
2452 THROW_MSG(vmSymbols::java_lang_ArrayIndexOutOfBoundsException(), ss.as_string());
2453 }
2454 JNI_END
2455
2456
2457
2458 #define DEFINE_NEWSCALARARRAY(Return,Allocator,Result \
2459 ,EntryProbe,ReturnProbe) \
2460 \
2461 DT_RETURN_MARK_DECL(New##Result##Array, Return \
2462 , ReturnProbe); \
2463 \
2464 JNI_ENTRY(Return, \
2465 jni_New##Result##Array(JNIEnv *env, jsize len)) \
2466 EntryProbe; \
2467 Return ret = nullptr;\
2468 DT_RETURN_MARK(New##Result##Array, Return, (const Return&)ret);\
2469 \
2470 oop obj= oopFactory::Allocator(len, CHECK_NULL); \
2471 ret = (Return) JNIHandles::make_local(THREAD, obj); \
2472 return ret;\
2473 JNI_END
2474
2475 DEFINE_NEWSCALARARRAY(jbooleanArray, new_boolArray, Boolean,
2476 HOTSPOT_JNI_NEWBOOLEANARRAY_ENTRY(env, len),
2477 HOTSPOT_JNI_NEWBOOLEANARRAY_RETURN(_ret_ref))
2478 DEFINE_NEWSCALARARRAY(jbyteArray, new_byteArray, Byte,
2479 HOTSPOT_JNI_NEWBYTEARRAY_ENTRY(env, len),
2480 HOTSPOT_JNI_NEWBYTEARRAY_RETURN(_ret_ref))
2481 DEFINE_NEWSCALARARRAY(jshortArray, new_shortArray, Short,
2482 HOTSPOT_JNI_NEWSHORTARRAY_ENTRY(env, len),
2483 HOTSPOT_JNI_NEWSHORTARRAY_RETURN(_ret_ref))
2484 DEFINE_NEWSCALARARRAY(jcharArray, new_charArray, Char,
2485 HOTSPOT_JNI_NEWCHARARRAY_ENTRY(env, len),
2486 HOTSPOT_JNI_NEWCHARARRAY_RETURN(_ret_ref))
2487 DEFINE_NEWSCALARARRAY(jintArray, new_intArray, Int,
2488 HOTSPOT_JNI_NEWINTARRAY_ENTRY(env, len),
2489 HOTSPOT_JNI_NEWINTARRAY_RETURN(_ret_ref))
2490 DEFINE_NEWSCALARARRAY(jlongArray, new_longArray, Long,
2491 HOTSPOT_JNI_NEWLONGARRAY_ENTRY(env, len),
2492 HOTSPOT_JNI_NEWLONGARRAY_RETURN(_ret_ref))
2493 DEFINE_NEWSCALARARRAY(jfloatArray, new_floatArray, Float,
2494 HOTSPOT_JNI_NEWFLOATARRAY_ENTRY(env, len),
2495 HOTSPOT_JNI_NEWFLOATARRAY_RETURN(_ret_ref))
2496 DEFINE_NEWSCALARARRAY(jdoubleArray, new_doubleArray, Double,
2497 HOTSPOT_JNI_NEWDOUBLEARRAY_ENTRY(env, len),
2498 HOTSPOT_JNI_NEWDOUBLEARRAY_RETURN(_ret_ref))
2499
2500 // Return an address which will fault if the caller writes to it.
2501
2502 static char* get_bad_address() {
2503 static char* bad_address = nullptr;
2504 if (bad_address == nullptr) {
2505 size_t size = os::vm_allocation_granularity();
2506 bad_address = os::reserve_memory(size);
2507 if (bad_address != nullptr) {
2508 os::protect_memory(bad_address, size, os::MEM_PROT_READ,
2509 /*is_committed*/false);
2510 MemTracker::record_virtual_memory_tag((void*)bad_address, mtInternal);
2511 }
2512 }
2513 return bad_address;
2514 }
2515
2516
2517
2518 #define DEFINE_GETSCALARARRAYELEMENTS(ElementTag,ElementType,Result, Tag \
2519 , EntryProbe, ReturnProbe) \
2520 \
2521 JNI_ENTRY_NO_PRESERVE(ElementType*, \
2522 jni_Get##Result##ArrayElements(JNIEnv *env, ElementType##Array array, jboolean *isCopy)) \
2523 EntryProbe; \
2524 /* allocate an chunk of memory in c land */ \
2525 typeArrayOop a = typeArrayOop(JNIHandles::resolve_non_null(array)); \
2526 ElementType* result; \
2527 int len = a->length(); \
2528 if (len == 0) { \
2529 if (isCopy != nullptr) { \
2530 *isCopy = JNI_FALSE; \
2531 } \
2532 /* Empty array: legal but useless, can't return null. \
2533 * Return a pointer to something useless. \
2534 * Avoid asserts in typeArrayOop. */ \
2535 result = (ElementType*)get_bad_address(); \
2536 } else { \
2537 /* JNI Specification states return null on OOM */ \
2538 result = NEW_C_HEAP_ARRAY_RETURN_NULL(ElementType, len, mtInternal); \
2539 if (result != nullptr) { \
2540 /* copy the array to the c chunk */ \
2541 ArrayAccess<>::arraycopy_to_native(a, typeArrayOopDesc::element_offset<ElementType>(0), \
2542 result, len); \
2543 if (isCopy) { \
2544 *isCopy = JNI_TRUE; \
2545 } \
2546 } \
2547 } \
2548 ReturnProbe; \
2549 return result; \
2550 JNI_END
2551
2552 DEFINE_GETSCALARARRAYELEMENTS(T_BOOLEAN, jboolean, Boolean, bool
2553 , HOTSPOT_JNI_GETBOOLEANARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy),
2554 HOTSPOT_JNI_GETBOOLEANARRAYELEMENTS_RETURN((uintptr_t*)result))
2555 DEFINE_GETSCALARARRAYELEMENTS(T_BYTE, jbyte, Byte, byte
2556 , HOTSPOT_JNI_GETBYTEARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy),
2557 HOTSPOT_JNI_GETBYTEARRAYELEMENTS_RETURN((char*)result))
2558 DEFINE_GETSCALARARRAYELEMENTS(T_SHORT, jshort, Short, short
2559 , HOTSPOT_JNI_GETSHORTARRAYELEMENTS_ENTRY(env, (uint16_t*) array, (uintptr_t *) isCopy),
2560 HOTSPOT_JNI_GETSHORTARRAYELEMENTS_RETURN((uint16_t*)result))
2561 DEFINE_GETSCALARARRAYELEMENTS(T_CHAR, jchar, Char, char
2562 , HOTSPOT_JNI_GETCHARARRAYELEMENTS_ENTRY(env, (uint16_t*) array, (uintptr_t *) isCopy),
2563 HOTSPOT_JNI_GETCHARARRAYELEMENTS_RETURN(result))
2564 DEFINE_GETSCALARARRAYELEMENTS(T_INT, jint, Int, int
2565 , HOTSPOT_JNI_GETINTARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy),
2566 HOTSPOT_JNI_GETINTARRAYELEMENTS_RETURN((uint32_t*)result))
2567 DEFINE_GETSCALARARRAYELEMENTS(T_LONG, jlong, Long, long
2568 , HOTSPOT_JNI_GETLONGARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy),
2569 HOTSPOT_JNI_GETLONGARRAYELEMENTS_RETURN(((uintptr_t*)result)))
2570 // Float and double probes don't return value because dtrace doesn't currently support it
2571 DEFINE_GETSCALARARRAYELEMENTS(T_FLOAT, jfloat, Float, float
2572 , HOTSPOT_JNI_GETFLOATARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy),
2573 HOTSPOT_JNI_GETFLOATARRAYELEMENTS_RETURN(result))
2574 DEFINE_GETSCALARARRAYELEMENTS(T_DOUBLE, jdouble, Double, double
2575 , HOTSPOT_JNI_GETDOUBLEARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy),
2576 HOTSPOT_JNI_GETDOUBLEARRAYELEMENTS_RETURN(result))
2577
2578
2579 #define DEFINE_RELEASESCALARARRAYELEMENTS(ElementTag,ElementType,Result,Tag \
2580 , EntryProbe, ReturnProbe);\
2581 \
2582 JNI_ENTRY_NO_PRESERVE(void, \
2583 jni_Release##Result##ArrayElements(JNIEnv *env, ElementType##Array array, \
2584 ElementType *buf, jint mode)) \
2585 EntryProbe; \
2586 typeArrayOop a = typeArrayOop(JNIHandles::resolve_non_null(array)); \
2587 int len = a->length(); \
2588 if (len != 0) { /* Empty array: nothing to free or copy. */ \
2589 if ((mode == 0) || (mode == JNI_COMMIT)) { \
2590 ArrayAccess<>::arraycopy_from_native(buf, a, typeArrayOopDesc::element_offset<ElementType>(0), len); \
2591 } \
2592 if ((mode == 0) || (mode == JNI_ABORT)) { \
2593 FreeHeap(buf); \
2594 } \
2595 } \
2596 ReturnProbe; \
2597 JNI_END
2598
2599 DEFINE_RELEASESCALARARRAYELEMENTS(T_BOOLEAN, jboolean, Boolean, bool
2600 , HOTSPOT_JNI_RELEASEBOOLEANARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) buf, mode),
2601 HOTSPOT_JNI_RELEASEBOOLEANARRAYELEMENTS_RETURN())
2602 DEFINE_RELEASESCALARARRAYELEMENTS(T_BYTE, jbyte, Byte, byte
2603 , HOTSPOT_JNI_RELEASEBYTEARRAYELEMENTS_ENTRY(env, array, (char *) buf, mode),
2604 HOTSPOT_JNI_RELEASEBYTEARRAYELEMENTS_RETURN())
2605 DEFINE_RELEASESCALARARRAYELEMENTS(T_SHORT, jshort, Short, short
2606 , HOTSPOT_JNI_RELEASESHORTARRAYELEMENTS_ENTRY(env, array, (uint16_t *) buf, mode),
2607 HOTSPOT_JNI_RELEASESHORTARRAYELEMENTS_RETURN())
2608 DEFINE_RELEASESCALARARRAYELEMENTS(T_CHAR, jchar, Char, char
2609 , HOTSPOT_JNI_RELEASECHARARRAYELEMENTS_ENTRY(env, array, (uint16_t *) buf, mode),
2610 HOTSPOT_JNI_RELEASECHARARRAYELEMENTS_RETURN())
2611 DEFINE_RELEASESCALARARRAYELEMENTS(T_INT, jint, Int, int
2612 , HOTSPOT_JNI_RELEASEINTARRAYELEMENTS_ENTRY(env, array, (uint32_t *) buf, mode),
2613 HOTSPOT_JNI_RELEASEINTARRAYELEMENTS_RETURN())
2614 DEFINE_RELEASESCALARARRAYELEMENTS(T_LONG, jlong, Long, long
2615 , HOTSPOT_JNI_RELEASELONGARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) buf, mode),
2616 HOTSPOT_JNI_RELEASELONGARRAYELEMENTS_RETURN())
2617 DEFINE_RELEASESCALARARRAYELEMENTS(T_FLOAT, jfloat, Float, float
2618 , HOTSPOT_JNI_RELEASEFLOATARRAYELEMENTS_ENTRY(env, array, (float *) buf, mode),
2619 HOTSPOT_JNI_RELEASEFLOATARRAYELEMENTS_RETURN())
2620 DEFINE_RELEASESCALARARRAYELEMENTS(T_DOUBLE, jdouble, Double, double
2621 , HOTSPOT_JNI_RELEASEDOUBLEARRAYELEMENTS_ENTRY(env, array, (double *) buf, mode),
2622 HOTSPOT_JNI_RELEASEDOUBLEARRAYELEMENTS_RETURN())
2623
2624 static void check_bounds(jsize start, jsize copy_len, jsize array_len, TRAPS) {
2625 ResourceMark rm(THREAD);
2626 if (copy_len < 0) {
2627 stringStream ss;
2628 ss.print("Length %d is negative", copy_len);
2629 THROW_MSG(vmSymbols::java_lang_ArrayIndexOutOfBoundsException(), ss.as_string());
2630 } else if (start < 0 || (start > array_len - copy_len)) {
2631 stringStream ss;
2632 ss.print("Array region %d.." INT64_FORMAT " out of bounds for length %d",
2633 start, (int64_t)start+(int64_t)copy_len, array_len);
2634 THROW_MSG(vmSymbols::java_lang_ArrayIndexOutOfBoundsException(), ss.as_string());
2635 }
2636 }
2637
2638 #define DEFINE_GETSCALARARRAYREGION(ElementTag,ElementType,Result, Tag \
2639 , EntryProbe, ReturnProbe); \
2640 DT_VOID_RETURN_MARK_DECL(Get##Result##ArrayRegion \
2641 , ReturnProbe); \
2642 \
2643 JNI_ENTRY(void, \
2644 jni_Get##Result##ArrayRegion(JNIEnv *env, ElementType##Array array, jsize start, \
2645 jsize len, ElementType *buf)) \
2646 EntryProbe; \
2647 DT_VOID_RETURN_MARK(Get##Result##ArrayRegion); \
2648 typeArrayOop src = typeArrayOop(JNIHandles::resolve_non_null(array)); \
2649 check_bounds(start, len, src->length(), CHECK); \
2650 if (len > 0) { \
2651 ArrayAccess<>::arraycopy_to_native(src, typeArrayOopDesc::element_offset<ElementType>(start), buf, len); \
2652 } \
2653 JNI_END
2654
2655 DEFINE_GETSCALARARRAYREGION(T_BOOLEAN, jboolean,Boolean, bool
2656 , HOTSPOT_JNI_GETBOOLEANARRAYREGION_ENTRY(env, array, start, len, (uintptr_t *) buf),
2657 HOTSPOT_JNI_GETBOOLEANARRAYREGION_RETURN());
2658 DEFINE_GETSCALARARRAYREGION(T_BYTE, jbyte, Byte, byte
2659 , HOTSPOT_JNI_GETBYTEARRAYREGION_ENTRY(env, array, start, len, (char *) buf),
2660 HOTSPOT_JNI_GETBYTEARRAYREGION_RETURN());
2661 DEFINE_GETSCALARARRAYREGION(T_SHORT, jshort, Short, short
2662 , HOTSPOT_JNI_GETSHORTARRAYREGION_ENTRY(env, array, start, len, (uint16_t *) buf),
2663 HOTSPOT_JNI_GETSHORTARRAYREGION_RETURN());
2664 DEFINE_GETSCALARARRAYREGION(T_CHAR, jchar, Char, char
2665 , HOTSPOT_JNI_GETCHARARRAYREGION_ENTRY(env, array, start, len, (uint16_t*) buf),
2666 HOTSPOT_JNI_GETCHARARRAYREGION_RETURN());
2667 DEFINE_GETSCALARARRAYREGION(T_INT, jint, Int, int
2668 , HOTSPOT_JNI_GETINTARRAYREGION_ENTRY(env, array, start, len, (uint32_t*) buf),
2669 HOTSPOT_JNI_GETINTARRAYREGION_RETURN());
2670 DEFINE_GETSCALARARRAYREGION(T_LONG, jlong, Long, long
2671 , HOTSPOT_JNI_GETLONGARRAYREGION_ENTRY(env, array, start, len, (uintptr_t *) buf),
2672 HOTSPOT_JNI_GETLONGARRAYREGION_RETURN());
2673 DEFINE_GETSCALARARRAYREGION(T_FLOAT, jfloat, Float, float
2674 , HOTSPOT_JNI_GETFLOATARRAYREGION_ENTRY(env, array, start, len, (float *) buf),
2675 HOTSPOT_JNI_GETFLOATARRAYREGION_RETURN());
2676 DEFINE_GETSCALARARRAYREGION(T_DOUBLE, jdouble, Double, double
2677 , HOTSPOT_JNI_GETDOUBLEARRAYREGION_ENTRY(env, array, start, len, (double *) buf),
2678 HOTSPOT_JNI_GETDOUBLEARRAYREGION_RETURN());
2679
2680
2681 #define DEFINE_SETSCALARARRAYREGION(ElementTag,ElementType,Result, Tag \
2682 , EntryProbe, ReturnProbe); \
2683 DT_VOID_RETURN_MARK_DECL(Set##Result##ArrayRegion \
2684 ,ReturnProbe); \
2685 \
2686 JNI_ENTRY(void, \
2687 jni_Set##Result##ArrayRegion(JNIEnv *env, ElementType##Array array, jsize start, \
2688 jsize len, const ElementType *buf)) \
2689 EntryProbe; \
2690 DT_VOID_RETURN_MARK(Set##Result##ArrayRegion); \
2691 typeArrayOop dst = typeArrayOop(JNIHandles::resolve_non_null(array)); \
2692 check_bounds(start, len, dst->length(), CHECK); \
2693 if (len > 0) { \
2694 ArrayAccess<>::arraycopy_from_native(buf, dst, typeArrayOopDesc::element_offset<ElementType>(start), len); \
2695 } \
2696 JNI_END
2697
2698 DEFINE_SETSCALARARRAYREGION(T_BOOLEAN, jboolean, Boolean, bool
2699 , HOTSPOT_JNI_SETBOOLEANARRAYREGION_ENTRY(env, array, start, len, (uintptr_t *)buf),
2700 HOTSPOT_JNI_SETBOOLEANARRAYREGION_RETURN())
2701 DEFINE_SETSCALARARRAYREGION(T_BYTE, jbyte, Byte, byte
2702 , HOTSPOT_JNI_SETBYTEARRAYREGION_ENTRY(env, array, start, len, (char *) buf),
2703 HOTSPOT_JNI_SETBYTEARRAYREGION_RETURN())
2704 DEFINE_SETSCALARARRAYREGION(T_SHORT, jshort, Short, short
2705 , HOTSPOT_JNI_SETSHORTARRAYREGION_ENTRY(env, array, start, len, (uint16_t *) buf),
2706 HOTSPOT_JNI_SETSHORTARRAYREGION_RETURN())
2707 DEFINE_SETSCALARARRAYREGION(T_CHAR, jchar, Char, char
2708 , HOTSPOT_JNI_SETCHARARRAYREGION_ENTRY(env, array, start, len, (uint16_t *) buf),
2709 HOTSPOT_JNI_SETCHARARRAYREGION_RETURN())
2710 DEFINE_SETSCALARARRAYREGION(T_INT, jint, Int, int
2711 , HOTSPOT_JNI_SETINTARRAYREGION_ENTRY(env, array, start, len, (uint32_t *) buf),
2712 HOTSPOT_JNI_SETINTARRAYREGION_RETURN())
2713 DEFINE_SETSCALARARRAYREGION(T_LONG, jlong, Long, long
2714 , HOTSPOT_JNI_SETLONGARRAYREGION_ENTRY(env, array, start, len, (uintptr_t *) buf),
2715 HOTSPOT_JNI_SETLONGARRAYREGION_RETURN())
2716 DEFINE_SETSCALARARRAYREGION(T_FLOAT, jfloat, Float, float
2717 , HOTSPOT_JNI_SETFLOATARRAYREGION_ENTRY(env, array, start, len, (float *) buf),
2718 HOTSPOT_JNI_SETFLOATARRAYREGION_RETURN())
2719 DEFINE_SETSCALARARRAYREGION(T_DOUBLE, jdouble, Double, double
2720 , HOTSPOT_JNI_SETDOUBLEARRAYREGION_ENTRY(env, array, start, len, (double *) buf),
2721 HOTSPOT_JNI_SETDOUBLEARRAYREGION_RETURN())
2722
2723
2724 DT_RETURN_MARK_DECL(RegisterNatives, jint
2725 , HOTSPOT_JNI_REGISTERNATIVES_RETURN(_ret_ref));
2726
2727 JNI_ENTRY(jint, jni_RegisterNatives(JNIEnv *env, jclass clazz,
2728 const JNINativeMethod *methods,
2729 jint nMethods))
2730 HOTSPOT_JNI_REGISTERNATIVES_ENTRY(env, clazz, (void *) methods, nMethods);
2731 jint ret = 0;
2732 DT_RETURN_MARK(RegisterNatives, jint, (const jint&)ret);
2733
2734 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz));
2735
2736 // There are no restrictions on native code registering native methods,
2737 // which allows agents to redefine the bindings to native methods, however
2738 // we issue a warning if any code running outside of the boot/platform
2739 // loader is rebinding any native methods in classes loaded by the
2740 // boot/platform loader that are in named modules. That will catch changes
2741 // to platform classes while excluding classes added to the bootclasspath.
2742 bool do_warning = false;
2743
2744 // Only instanceKlasses can have native methods
2745 if (k->is_instance_klass()) {
2746 oop cl = k->class_loader();
2747 InstanceKlass* ik = InstanceKlass::cast(k);
2748 // Check for a platform class
2749 if ((cl == nullptr || SystemDictionary::is_platform_class_loader(cl)) &&
2750 ik->module()->is_named()) {
2751 Klass* caller = thread->security_get_caller_class(1);
2752 // If no caller class, or caller class has a different loader, then
2753 // issue a warning below.
2754 do_warning = (caller == nullptr) || caller->class_loader() != cl;
2755 }
2756 }
2757
2758
2759 for (int index = 0; index < nMethods; index++) {
2760 const char* meth_name = methods[index].name;
2761 const char* meth_sig = methods[index].signature;
2762 int meth_name_len = (int)strlen(meth_name);
2763
2764 // The class should have been loaded (we have an instance of the class
2765 // passed in) so the method and signature should already be in the symbol
2766 // table. If they're not there, the method doesn't exist.
2767 TempNewSymbol name = SymbolTable::probe(meth_name, meth_name_len);
2768 TempNewSymbol signature = SymbolTable::probe(meth_sig, (int)strlen(meth_sig));
2769
2770 if (name == nullptr || signature == nullptr) {
2771 ResourceMark rm(THREAD);
2772 stringStream st;
2773 st.print("Method %s.%s%s not found", k->external_name(), meth_name, meth_sig);
2774 // Must return negative value on failure
2775 THROW_MSG_(vmSymbols::java_lang_NoSuchMethodError(), st.as_string(), -1);
2776 }
2777
2778 if (do_warning) {
2779 ResourceMark rm(THREAD);
2780 log_warning(jni, resolve)("Re-registering of platform native method: %s.%s%s "
2781 "from code in a different classloader", k->external_name(), meth_name, meth_sig);
2782 }
2783
2784 bool res = Method::register_native(k, name, signature,
2785 (address) methods[index].fnPtr, THREAD);
2786 if (!res) {
2787 ret = -1;
2788 break;
2789 }
2790 }
2791 return ret;
2792 JNI_END
2793
2794
2795 JNI_ENTRY(jint, jni_UnregisterNatives(JNIEnv *env, jclass clazz))
2796 HOTSPOT_JNI_UNREGISTERNATIVES_ENTRY(env, clazz);
2797 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz));
2798 //%note jni_2
2799 if (k->is_instance_klass()) {
2800 for (int index = 0; index < InstanceKlass::cast(k)->methods()->length(); index++) {
2801 Method* m = InstanceKlass::cast(k)->methods()->at(index);
2802 if (m->is_native()) {
2803 m->clear_native_function();
2804 m->set_signature_handler(nullptr);
2805 }
2806 }
2807 }
2808 HOTSPOT_JNI_UNREGISTERNATIVES_RETURN(0);
2809 return 0;
2810 JNI_END
2811
2812 //
2813 // Monitor functions
2814 //
2815
2816 DT_RETURN_MARK_DECL(MonitorEnter, jint
2817 , HOTSPOT_JNI_MONITORENTER_RETURN(_ret_ref));
2818
2819 JNI_ENTRY(jint, jni_MonitorEnter(JNIEnv *env, jobject jobj))
2820 HOTSPOT_JNI_MONITORENTER_ENTRY(env, jobj);
2821 jint ret = JNI_ERR;
2822 DT_RETURN_MARK(MonitorEnter, jint, (const jint&)ret);
2823
2824 // If the object is null, we can't do anything with it
2825 if (jobj == nullptr) {
2826 THROW_(vmSymbols::java_lang_NullPointerException(), JNI_ERR);
2827 }
2828
2829 Handle obj(thread, JNIHandles::resolve_non_null(jobj));
2830 ObjectSynchronizer::jni_enter(obj, thread);
2831 return JNI_OK;
2832 JNI_END
2833
2834 DT_RETURN_MARK_DECL(MonitorExit, jint
2835 , HOTSPOT_JNI_MONITOREXIT_RETURN(_ret_ref));
2836
2837 JNI_ENTRY(jint, jni_MonitorExit(JNIEnv *env, jobject jobj))
2838 HOTSPOT_JNI_MONITOREXIT_ENTRY(env, jobj);
2839 jint ret = JNI_ERR;
2840 DT_RETURN_MARK(MonitorExit, jint, (const jint&)ret);
2841
2842 // Don't do anything with a null object
2843 if (jobj == nullptr) {
2844 THROW_(vmSymbols::java_lang_NullPointerException(), JNI_ERR);
2845 }
2846
2847 Handle obj(THREAD, JNIHandles::resolve_non_null(jobj));
2848 ObjectSynchronizer::jni_exit(obj(), CHECK_(JNI_ERR));
2849 return JNI_OK;
2850 JNI_END
2851
2852 //
2853 // Extensions
2854 //
2855
2856 DT_VOID_RETURN_MARK_DECL(GetStringRegion
2857 , HOTSPOT_JNI_GETSTRINGREGION_RETURN());
2858
2859 JNI_ENTRY(void, jni_GetStringRegion(JNIEnv *env, jstring string, jsize start, jsize len, jchar *buf))
2860 HOTSPOT_JNI_GETSTRINGREGION_ENTRY(env, string, start, len, buf);
2861 DT_VOID_RETURN_MARK(GetStringRegion);
2862 oop s = JNIHandles::resolve_non_null(string);
2863 typeArrayOop s_value = java_lang_String::value(s);
2864 int s_len = java_lang_String::length(s, s_value);
2865 if (start < 0 || len < 0 || start > s_len - len) {
2866 THROW(vmSymbols::java_lang_StringIndexOutOfBoundsException());
2867 } else {
2868 if (len > 0) {
2869 bool is_latin1 = java_lang_String::is_latin1(s);
2870 if (!is_latin1) {
2871 ArrayAccess<>::arraycopy_to_native(s_value, typeArrayOopDesc::element_offset<jchar>(start),
2872 buf, len);
2873 } else {
2874 for (int i = 0; i < len; i++) {
2875 buf[i] = ((jchar) s_value->byte_at(i + start)) & 0xff;
2876 }
2877 }
2878 }
2879 }
2880 JNI_END
2881
2882 DT_VOID_RETURN_MARK_DECL(GetStringUTFRegion
2883 , HOTSPOT_JNI_GETSTRINGUTFREGION_RETURN());
2884
2885 JNI_ENTRY(void, jni_GetStringUTFRegion(JNIEnv *env, jstring string, jsize start, jsize len, char *buf))
2886 HOTSPOT_JNI_GETSTRINGUTFREGION_ENTRY(env, string, start, len, buf);
2887 DT_VOID_RETURN_MARK(GetStringUTFRegion);
2888 oop s = JNIHandles::resolve_non_null(string);
2889 typeArrayOop s_value = java_lang_String::value(s);
2890 int s_len = java_lang_String::length(s, s_value);
2891 if (start < 0 || len < 0 || start > s_len - len) {
2892 THROW(vmSymbols::java_lang_StringIndexOutOfBoundsException());
2893 } else {
2894 //%note jni_7
2895 if (len > 0) {
2896 // Assume the buffer is large enough as the JNI spec. does not require user error checking
2897 java_lang_String::as_utf8_string(s, s_value, start, len, buf, INT_MAX);
2898 // as_utf8_string null-terminates the result string
2899 } else {
2900 // JDK null-terminates the buffer even in len is zero
2901 if (buf != nullptr) {
2902 buf[0] = 0;
2903 }
2904 }
2905 }
2906 JNI_END
2907
2908 JNI_ENTRY(void*, jni_GetPrimitiveArrayCritical(JNIEnv *env, jarray array, jboolean *isCopy))
2909 HOTSPOT_JNI_GETPRIMITIVEARRAYCRITICAL_ENTRY(env, array, (uintptr_t *) isCopy);
2910 Handle a(thread, JNIHandles::resolve_non_null(array));
2911 assert(a->is_typeArray(), "just checking");
2912
2913 // Pin object
2914 Universe::heap()->pin_object(thread, a());
2915
2916 BasicType type = TypeArrayKlass::cast(a->klass())->element_type();
2917 void* ret = arrayOop(a())->base(type);
2918 if (isCopy != nullptr) {
2919 *isCopy = JNI_FALSE;
2920 }
2921 HOTSPOT_JNI_GETPRIMITIVEARRAYCRITICAL_RETURN(ret);
2922 return ret;
2923 JNI_END
2924
2925
2926 JNI_ENTRY(void, jni_ReleasePrimitiveArrayCritical(JNIEnv *env, jarray array, void *carray, jint mode))
2927 HOTSPOT_JNI_RELEASEPRIMITIVEARRAYCRITICAL_ENTRY(env, array, carray, mode);
2928 // Unpin object
2929 Universe::heap()->unpin_object(thread, JNIHandles::resolve_non_null(array));
2930 HOTSPOT_JNI_RELEASEPRIMITIVEARRAYCRITICAL_RETURN();
2931 JNI_END
2932
2933
2934 JNI_ENTRY(const jchar*, jni_GetStringCritical(JNIEnv *env, jstring string, jboolean *isCopy))
2935 HOTSPOT_JNI_GETSTRINGCRITICAL_ENTRY(env, string, (uintptr_t *) isCopy);
2936 oop s = JNIHandles::resolve_non_null(string);
2937 jchar* ret;
2938 if (!java_lang_String::is_latin1(s)) {
2939 typeArrayHandle s_value(thread, java_lang_String::value(s));
2940
2941 // Pin value array
2942 Universe::heap()->pin_object(thread, s_value());
2943
2944 ret = (jchar*) s_value->base(T_CHAR);
2945 if (isCopy != nullptr) *isCopy = JNI_FALSE;
2946 } else {
2947 // Inflate latin1 encoded string to UTF16
2948 typeArrayOop s_value = java_lang_String::value(s);
2949 int s_len = java_lang_String::length(s, s_value);
2950 ret = NEW_C_HEAP_ARRAY_RETURN_NULL(jchar, s_len + 1, mtInternal); // add one for zero termination
2951 /* JNI Specification states return null on OOM */
2952 if (ret != nullptr) {
2953 for (int i = 0; i < s_len; i++) {
2954 ret[i] = ((jchar) s_value->byte_at(i)) & 0xff;
2955 }
2956 ret[s_len] = 0;
2957 }
2958 if (isCopy != nullptr) *isCopy = JNI_TRUE;
2959 }
2960 HOTSPOT_JNI_GETSTRINGCRITICAL_RETURN((uint16_t *) ret);
2961 return ret;
2962 JNI_END
2963
2964
2965 JNI_ENTRY(void, jni_ReleaseStringCritical(JNIEnv *env, jstring str, const jchar *chars))
2966 HOTSPOT_JNI_RELEASESTRINGCRITICAL_ENTRY(env, str, (uint16_t *) chars);
2967 oop s = JNIHandles::resolve_non_null(str);
2968 bool is_latin1 = java_lang_String::is_latin1(s);
2969
2970 if (is_latin1) {
2971 // For latin1 string, free jchar array allocated by earlier call to GetStringCritical.
2972 // This assumes that ReleaseStringCritical bookends GetStringCritical.
2973 FREE_C_HEAP_ARRAY(jchar, chars);
2974 } else {
2975 // StringDedup can have replaced the value array, so don't fetch the array from 's'.
2976 // Instead, we calculate the address based on the jchar array exposed with GetStringCritical.
2977 oop value = cast_to_oop((address)chars - arrayOopDesc::base_offset_in_bytes(T_CHAR));
2978
2979 // Unpin value array
2980 Universe::heap()->unpin_object(thread, value);
2981 }
2982 HOTSPOT_JNI_RELEASESTRINGCRITICAL_RETURN();
2983 JNI_END
2984
2985
2986 JNI_ENTRY(jweak, jni_NewWeakGlobalRef(JNIEnv *env, jobject ref))
2987 HOTSPOT_JNI_NEWWEAKGLOBALREF_ENTRY(env, ref);
2988 Handle ref_handle(thread, JNIHandles::resolve(ref));
2989 jweak ret = JNIHandles::make_weak_global(ref_handle, AllocFailStrategy::RETURN_NULL);
2990 if (ret == nullptr && ref_handle.not_null()) {
2991 THROW_OOP_(Universe::out_of_memory_error_c_heap(), nullptr);
2992 }
2993 HOTSPOT_JNI_NEWWEAKGLOBALREF_RETURN(ret);
2994 return ret;
2995 JNI_END
2996
2997 // Must be JNI_ENTRY (with HandleMark)
2998 JNI_ENTRY(void, jni_DeleteWeakGlobalRef(JNIEnv *env, jweak ref))
2999 HOTSPOT_JNI_DELETEWEAKGLOBALREF_ENTRY(env, ref);
3000 JNIHandles::destroy_weak_global(ref);
3001 HOTSPOT_JNI_DELETEWEAKGLOBALREF_RETURN();
3002 JNI_END
3003
3004
3005 JNI_ENTRY_NO_PRESERVE(jboolean, jni_ExceptionCheck(JNIEnv *env))
3006 HOTSPOT_JNI_EXCEPTIONCHECK_ENTRY(env);
3007 jni_check_async_exceptions(thread);
3008 jboolean ret = (thread->has_pending_exception()) ? JNI_TRUE : JNI_FALSE;
3009 HOTSPOT_JNI_EXCEPTIONCHECK_RETURN(ret);
3010 return ret;
3011 JNI_END
3012
3013
3014 // Initialization state for three routines below relating to
3015 // java.nio.DirectBuffers
3016 static int directBufferSupportInitializeStarted = 0;
3017 static volatile int directBufferSupportInitializeEnded = 0;
3018 static volatile int directBufferSupportInitializeFailed = 0;
3019 static jclass bufferClass = nullptr;
3020 static jclass directBufferClass = nullptr;
3021 static jclass directByteBufferClass = nullptr;
3022 static jmethodID directByteBufferConstructor = nullptr;
3023 static jfieldID directBufferAddressField = nullptr;
3024 static jfieldID bufferCapacityField = nullptr;
3025
3026 static jclass lookupOne(JNIEnv* env, const char* name, TRAPS) {
3027 Handle loader; // null (bootstrap) loader
3028 Handle protection_domain; // null protection domain
3029
3030 TempNewSymbol sym = SymbolTable::new_symbol(name);
3031 jclass result = find_class_from_class_loader(env, sym, true, loader, protection_domain, true, CHECK_NULL);
3032
3033 if (log_is_enabled(Debug, class, resolve) && result != nullptr) {
3034 trace_class_resolution(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(result)));
3035 }
3036 return result;
3037 }
3038
3039 // These lookups are done with the null (bootstrap) ClassLoader to
3040 // circumvent any security checks that would be done by jni_FindClass.
3041 JNI_ENTRY(bool, lookupDirectBufferClasses(JNIEnv* env))
3042 {
3043 if ((bufferClass = lookupOne(env, "java/nio/Buffer", thread)) == nullptr) { return false; }
3044 if ((directBufferClass = lookupOne(env, "sun/nio/ch/DirectBuffer", thread)) == nullptr) { return false; }
3045 if ((directByteBufferClass = lookupOne(env, "java/nio/DirectByteBuffer", thread)) == nullptr) { return false; }
3046 return true;
3047 }
3048 JNI_END
3049
3050
3051 static bool initializeDirectBufferSupport(JNIEnv* env, JavaThread* thread) {
3052 if (directBufferSupportInitializeFailed) {
3053 return false;
3054 }
3055
3056 if (Atomic::cmpxchg(&directBufferSupportInitializeStarted, 0, 1) == 0) {
3057 if (!lookupDirectBufferClasses(env)) {
3058 directBufferSupportInitializeFailed = 1;
3059 return false;
3060 }
3061
3062 // Make global references for these
3063 bufferClass = (jclass) env->NewGlobalRef(bufferClass);
3064 directBufferClass = (jclass) env->NewGlobalRef(directBufferClass);
3065 directByteBufferClass = (jclass) env->NewGlobalRef(directByteBufferClass);
3066
3067 // Global refs will be null if out-of-memory (no exception is pending)
3068 if (bufferClass == nullptr || directBufferClass == nullptr || directByteBufferClass == nullptr) {
3069 directBufferSupportInitializeFailed = 1;
3070 return false;
3071 }
3072
3073 // Get needed field and method IDs
3074 directByteBufferConstructor = env->GetMethodID(directByteBufferClass, "<init>", "(JJ)V");
3075 if (env->ExceptionCheck()) {
3076 env->ExceptionClear();
3077 directBufferSupportInitializeFailed = 1;
3078 return false;
3079 }
3080 directBufferAddressField = env->GetFieldID(bufferClass, "address", "J");
3081 if (env->ExceptionCheck()) {
3082 env->ExceptionClear();
3083 directBufferSupportInitializeFailed = 1;
3084 return false;
3085 }
3086 bufferCapacityField = env->GetFieldID(bufferClass, "capacity", "I");
3087 if (env->ExceptionCheck()) {
3088 env->ExceptionClear();
3089 directBufferSupportInitializeFailed = 1;
3090 return false;
3091 }
3092
3093 if ((directByteBufferConstructor == nullptr) ||
3094 (directBufferAddressField == nullptr) ||
3095 (bufferCapacityField == nullptr)) {
3096 directBufferSupportInitializeFailed = 1;
3097 return false;
3098 }
3099
3100 directBufferSupportInitializeEnded = 1;
3101 } else {
3102 while (!directBufferSupportInitializeEnded && !directBufferSupportInitializeFailed) {
3103 os::naked_yield();
3104 }
3105 }
3106
3107 return !directBufferSupportInitializeFailed;
3108 }
3109
3110 extern "C" jobject JNICALL jni_NewDirectByteBuffer(JNIEnv *env, void* address, jlong capacity)
3111 {
3112 // thread_from_jni_environment() will block if VM is gone.
3113 JavaThread* thread = JavaThread::thread_from_jni_environment(env);
3114
3115 HOTSPOT_JNI_NEWDIRECTBYTEBUFFER_ENTRY(env, address, capacity);
3116
3117 if (!directBufferSupportInitializeEnded) {
3118 if (!initializeDirectBufferSupport(env, thread)) {
3119 HOTSPOT_JNI_NEWDIRECTBYTEBUFFER_RETURN(nullptr);
3120 return nullptr;
3121 }
3122 }
3123
3124 // Being paranoid about accidental sign extension on address
3125 jlong addr = (jlong) ((uintptr_t) address);
3126 jobject ret = env->NewObject(directByteBufferClass, directByteBufferConstructor, addr, capacity);
3127 HOTSPOT_JNI_NEWDIRECTBYTEBUFFER_RETURN(ret);
3128 return ret;
3129 }
3130
3131 DT_RETURN_MARK_DECL(GetDirectBufferAddress, void*
3132 , HOTSPOT_JNI_GETDIRECTBUFFERADDRESS_RETURN((void*) _ret_ref));
3133
3134 extern "C" void* JNICALL jni_GetDirectBufferAddress(JNIEnv *env, jobject buf)
3135 {
3136 // thread_from_jni_environment() will block if VM is gone.
3137 JavaThread* thread = JavaThread::thread_from_jni_environment(env);
3138
3139 HOTSPOT_JNI_GETDIRECTBUFFERADDRESS_ENTRY(env, buf);
3140 void* ret = nullptr;
3141 DT_RETURN_MARK(GetDirectBufferAddress, void*, (const void*&)ret);
3142
3143 if (!directBufferSupportInitializeEnded) {
3144 if (!initializeDirectBufferSupport(env, thread)) {
3145 return nullptr;
3146 }
3147 }
3148
3149 if ((buf != nullptr) && (!env->IsInstanceOf(buf, directBufferClass))) {
3150 return nullptr;
3151 }
3152
3153 ret = (void*)(intptr_t)env->GetLongField(buf, directBufferAddressField);
3154 return ret;
3155 }
3156
3157 DT_RETURN_MARK_DECL(GetDirectBufferCapacity, jlong
3158 , HOTSPOT_JNI_GETDIRECTBUFFERCAPACITY_RETURN(_ret_ref));
3159
3160 extern "C" jlong JNICALL jni_GetDirectBufferCapacity(JNIEnv *env, jobject buf)
3161 {
3162 // thread_from_jni_environment() will block if VM is gone.
3163 JavaThread* thread = JavaThread::thread_from_jni_environment(env);
3164
3165 HOTSPOT_JNI_GETDIRECTBUFFERCAPACITY_ENTRY(env, buf);
3166 jlong ret = -1;
3167 DT_RETURN_MARK(GetDirectBufferCapacity, jlong, (const jlong&)ret);
3168
3169 if (!directBufferSupportInitializeEnded) {
3170 if (!initializeDirectBufferSupport(env, thread)) {
3171 ret = 0;
3172 return ret;
3173 }
3174 }
3175
3176 if (buf == nullptr) {
3177 return -1;
3178 }
3179
3180 if (!env->IsInstanceOf(buf, directBufferClass)) {
3181 return -1;
3182 }
3183
3184 // NOTE that capacity is currently an int in the implementation
3185 ret = env->GetIntField(buf, bufferCapacityField);
3186 return ret;
3187 }
3188
3189
3190 JNI_LEAF(jint, jni_GetVersion(JNIEnv *env))
3191 HOTSPOT_JNI_GETVERSION_ENTRY(env);
3192 HOTSPOT_JNI_GETVERSION_RETURN(CurrentVersion);
3193 return CurrentVersion;
3194 JNI_END
3195
3196 extern struct JavaVM_ main_vm;
3197
3198 JNI_LEAF(jint, jni_GetJavaVM(JNIEnv *env, JavaVM **vm))
3199 HOTSPOT_JNI_GETJAVAVM_ENTRY(env, (void **) vm);
3200 *vm = (JavaVM *)(&main_vm);
3201 HOTSPOT_JNI_GETJAVAVM_RETURN(JNI_OK);
3202 return JNI_OK;
3203 JNI_END
3204
3205
3206 JNI_ENTRY(jobject, jni_GetModule(JNIEnv* env, jclass clazz))
3207 return Modules::get_module(clazz, THREAD);
3208 JNI_END
3209
3210 JNI_ENTRY(jboolean, jni_IsVirtualThread(JNIEnv* env, jobject obj))
3211 oop thread_obj = JNIHandles::resolve_external_guard(obj);
3212 if (thread_obj != nullptr && thread_obj->is_a(vmClasses::BaseVirtualThread_klass())) {
3213 return JNI_TRUE;
3214 } else {
3215 return JNI_FALSE;
3216 }
3217 JNI_END
3218
3219
3220 // Structure containing all jni functions
3221 struct JNINativeInterface_ jni_NativeInterface = {
3222 nullptr,
3223 nullptr,
3224 nullptr,
3225
3226 nullptr,
3227
3228 jni_GetVersion,
3229
3230 jni_DefineClass,
3231 jni_FindClass,
3232
3233 jni_FromReflectedMethod,
3234 jni_FromReflectedField,
3235
3236 jni_ToReflectedMethod,
3237
3238 jni_GetSuperclass,
3239 jni_IsAssignableFrom,
3240
3241 jni_ToReflectedField,
3242
3243 jni_Throw,
3244 jni_ThrowNew,
3245 jni_ExceptionOccurred,
3246 jni_ExceptionDescribe,
3247 jni_ExceptionClear,
3248 jni_FatalError,
3249
3250 jni_PushLocalFrame,
3251 jni_PopLocalFrame,
3252
3253 jni_NewGlobalRef,
3254 jni_DeleteGlobalRef,
3255 jni_DeleteLocalRef,
3256 jni_IsSameObject,
3257
3258 jni_NewLocalRef,
3259 jni_EnsureLocalCapacity,
3260
3261 jni_AllocObject,
3262 jni_NewObject,
3263 jni_NewObjectV,
3264 jni_NewObjectA,
3265
3266 jni_GetObjectClass,
3267 jni_IsInstanceOf,
3268
3269 jni_GetMethodID,
3270
3271 jni_CallObjectMethod,
3272 jni_CallObjectMethodV,
3273 jni_CallObjectMethodA,
3274 jni_CallBooleanMethod,
3275 jni_CallBooleanMethodV,
3276 jni_CallBooleanMethodA,
3277 jni_CallByteMethod,
3278 jni_CallByteMethodV,
3279 jni_CallByteMethodA,
3280 jni_CallCharMethod,
3281 jni_CallCharMethodV,
3282 jni_CallCharMethodA,
3283 jni_CallShortMethod,
3284 jni_CallShortMethodV,
3285 jni_CallShortMethodA,
3286 jni_CallIntMethod,
3287 jni_CallIntMethodV,
3288 jni_CallIntMethodA,
3289 jni_CallLongMethod,
3290 jni_CallLongMethodV,
3291 jni_CallLongMethodA,
3292 jni_CallFloatMethod,
3293 jni_CallFloatMethodV,
3294 jni_CallFloatMethodA,
3295 jni_CallDoubleMethod,
3296 jni_CallDoubleMethodV,
3297 jni_CallDoubleMethodA,
3298 jni_CallVoidMethod,
3299 jni_CallVoidMethodV,
3300 jni_CallVoidMethodA,
3301
3302 jni_CallNonvirtualObjectMethod,
3303 jni_CallNonvirtualObjectMethodV,
3304 jni_CallNonvirtualObjectMethodA,
3305 jni_CallNonvirtualBooleanMethod,
3306 jni_CallNonvirtualBooleanMethodV,
3307 jni_CallNonvirtualBooleanMethodA,
3308 jni_CallNonvirtualByteMethod,
3309 jni_CallNonvirtualByteMethodV,
3310 jni_CallNonvirtualByteMethodA,
3311 jni_CallNonvirtualCharMethod,
3312 jni_CallNonvirtualCharMethodV,
3313 jni_CallNonvirtualCharMethodA,
3314 jni_CallNonvirtualShortMethod,
3315 jni_CallNonvirtualShortMethodV,
3316 jni_CallNonvirtualShortMethodA,
3317 jni_CallNonvirtualIntMethod,
3318 jni_CallNonvirtualIntMethodV,
3319 jni_CallNonvirtualIntMethodA,
3320 jni_CallNonvirtualLongMethod,
3321 jni_CallNonvirtualLongMethodV,
3322 jni_CallNonvirtualLongMethodA,
3323 jni_CallNonvirtualFloatMethod,
3324 jni_CallNonvirtualFloatMethodV,
3325 jni_CallNonvirtualFloatMethodA,
3326 jni_CallNonvirtualDoubleMethod,
3327 jni_CallNonvirtualDoubleMethodV,
3328 jni_CallNonvirtualDoubleMethodA,
3329 jni_CallNonvirtualVoidMethod,
3330 jni_CallNonvirtualVoidMethodV,
3331 jni_CallNonvirtualVoidMethodA,
3332
3333 jni_GetFieldID,
3334
3335 jni_GetObjectField,
3336 jni_GetBooleanField,
3337 jni_GetByteField,
3338 jni_GetCharField,
3339 jni_GetShortField,
3340 jni_GetIntField,
3341 jni_GetLongField,
3342 jni_GetFloatField,
3343 jni_GetDoubleField,
3344
3345 jni_SetObjectField,
3346 jni_SetBooleanField,
3347 jni_SetByteField,
3348 jni_SetCharField,
3349 jni_SetShortField,
3350 jni_SetIntField,
3351 jni_SetLongField,
3352 jni_SetFloatField,
3353 jni_SetDoubleField,
3354
3355 jni_GetStaticMethodID,
3356
3357 jni_CallStaticObjectMethod,
3358 jni_CallStaticObjectMethodV,
3359 jni_CallStaticObjectMethodA,
3360 jni_CallStaticBooleanMethod,
3361 jni_CallStaticBooleanMethodV,
3362 jni_CallStaticBooleanMethodA,
3363 jni_CallStaticByteMethod,
3364 jni_CallStaticByteMethodV,
3365 jni_CallStaticByteMethodA,
3366 jni_CallStaticCharMethod,
3367 jni_CallStaticCharMethodV,
3368 jni_CallStaticCharMethodA,
3369 jni_CallStaticShortMethod,
3370 jni_CallStaticShortMethodV,
3371 jni_CallStaticShortMethodA,
3372 jni_CallStaticIntMethod,
3373 jni_CallStaticIntMethodV,
3374 jni_CallStaticIntMethodA,
3375 jni_CallStaticLongMethod,
3376 jni_CallStaticLongMethodV,
3377 jni_CallStaticLongMethodA,
3378 jni_CallStaticFloatMethod,
3379 jni_CallStaticFloatMethodV,
3380 jni_CallStaticFloatMethodA,
3381 jni_CallStaticDoubleMethod,
3382 jni_CallStaticDoubleMethodV,
3383 jni_CallStaticDoubleMethodA,
3384 jni_CallStaticVoidMethod,
3385 jni_CallStaticVoidMethodV,
3386 jni_CallStaticVoidMethodA,
3387
3388 jni_GetStaticFieldID,
3389
3390 jni_GetStaticObjectField,
3391 jni_GetStaticBooleanField,
3392 jni_GetStaticByteField,
3393 jni_GetStaticCharField,
3394 jni_GetStaticShortField,
3395 jni_GetStaticIntField,
3396 jni_GetStaticLongField,
3397 jni_GetStaticFloatField,
3398 jni_GetStaticDoubleField,
3399
3400 jni_SetStaticObjectField,
3401 jni_SetStaticBooleanField,
3402 jni_SetStaticByteField,
3403 jni_SetStaticCharField,
3404 jni_SetStaticShortField,
3405 jni_SetStaticIntField,
3406 jni_SetStaticLongField,
3407 jni_SetStaticFloatField,
3408 jni_SetStaticDoubleField,
3409
3410 jni_NewString,
3411 jni_GetStringLength,
3412 jni_GetStringChars,
3413 jni_ReleaseStringChars,
3414
3415 jni_NewStringUTF,
3416 jni_GetStringUTFLength,
3417 jni_GetStringUTFChars,
3418 jni_ReleaseStringUTFChars,
3419
3420 jni_GetArrayLength,
3421
3422 jni_NewObjectArray,
3423 jni_GetObjectArrayElement,
3424 jni_SetObjectArrayElement,
3425
3426 jni_NewBooleanArray,
3427 jni_NewByteArray,
3428 jni_NewCharArray,
3429 jni_NewShortArray,
3430 jni_NewIntArray,
3431 jni_NewLongArray,
3432 jni_NewFloatArray,
3433 jni_NewDoubleArray,
3434
3435 jni_GetBooleanArrayElements,
3436 jni_GetByteArrayElements,
3437 jni_GetCharArrayElements,
3438 jni_GetShortArrayElements,
3439 jni_GetIntArrayElements,
3440 jni_GetLongArrayElements,
3441 jni_GetFloatArrayElements,
3442 jni_GetDoubleArrayElements,
3443
3444 jni_ReleaseBooleanArrayElements,
3445 jni_ReleaseByteArrayElements,
3446 jni_ReleaseCharArrayElements,
3447 jni_ReleaseShortArrayElements,
3448 jni_ReleaseIntArrayElements,
3449 jni_ReleaseLongArrayElements,
3450 jni_ReleaseFloatArrayElements,
3451 jni_ReleaseDoubleArrayElements,
3452
3453 jni_GetBooleanArrayRegion,
3454 jni_GetByteArrayRegion,
3455 jni_GetCharArrayRegion,
3456 jni_GetShortArrayRegion,
3457 jni_GetIntArrayRegion,
3458 jni_GetLongArrayRegion,
3459 jni_GetFloatArrayRegion,
3460 jni_GetDoubleArrayRegion,
3461
3462 jni_SetBooleanArrayRegion,
3463 jni_SetByteArrayRegion,
3464 jni_SetCharArrayRegion,
3465 jni_SetShortArrayRegion,
3466 jni_SetIntArrayRegion,
3467 jni_SetLongArrayRegion,
3468 jni_SetFloatArrayRegion,
3469 jni_SetDoubleArrayRegion,
3470
3471 jni_RegisterNatives,
3472 jni_UnregisterNatives,
3473
3474 jni_MonitorEnter,
3475 jni_MonitorExit,
3476
3477 jni_GetJavaVM,
3478
3479 jni_GetStringRegion,
3480 jni_GetStringUTFRegion,
3481
3482 jni_GetPrimitiveArrayCritical,
3483 jni_ReleasePrimitiveArrayCritical,
3484
3485 jni_GetStringCritical,
3486 jni_ReleaseStringCritical,
3487
3488 jni_NewWeakGlobalRef,
3489 jni_DeleteWeakGlobalRef,
3490
3491 jni_ExceptionCheck,
3492
3493 jni_NewDirectByteBuffer,
3494 jni_GetDirectBufferAddress,
3495 jni_GetDirectBufferCapacity,
3496
3497 // New 1_6 features
3498
3499 jni_GetObjectRefType,
3500
3501 // Module features
3502
3503 jni_GetModule,
3504
3505 // Virtual threads
3506
3507 jni_IsVirtualThread,
3508
3509 // Large UTF8 support
3510
3511 jni_GetStringUTFLengthAsLong
3512 };
3513
3514
3515 // For jvmti use to modify jni function table.
3516 // Java threads in native contiues to run until it is transitioned
3517 // to VM at safepoint. Before the transition or before it is blocked
3518 // for safepoint it may access jni function table. VM could crash if
3519 // any java thread access the jni function table in the middle of memcpy.
3520 // To avoid this each function pointers are copied automically.
3521 void copy_jni_function_table(const struct JNINativeInterface_ *new_jni_NativeInterface) {
3522 assert(SafepointSynchronize::is_at_safepoint(), "must be at safepoint");
3523 intptr_t *a = (intptr_t *) jni_functions();
3524 intptr_t *b = (intptr_t *) new_jni_NativeInterface;
3525 for (uint i=0; i < sizeof(struct JNINativeInterface_)/sizeof(void *); i++) {
3526 Atomic::store(a++, *b++);
3527 }
3528 }
3529
3530 void quicken_jni_functions() {
3531 // Replace Get<Primitive>Field with fast versions
3532 if (UseFastJNIAccessors && !VerifyJNIFields && !CheckJNICalls) {
3533 address func;
3534 func = JNI_FastGetField::generate_fast_get_boolean_field();
3535 if (func != (address)-1) {
3536 jni_NativeInterface.GetBooleanField = (GetBooleanField_t)func;
3537 }
3538 func = JNI_FastGetField::generate_fast_get_byte_field();
3539 if (func != (address)-1) {
3540 jni_NativeInterface.GetByteField = (GetByteField_t)func;
3541 }
3542 func = JNI_FastGetField::generate_fast_get_char_field();
3543 if (func != (address)-1) {
3544 jni_NativeInterface.GetCharField = (GetCharField_t)func;
3545 }
3546 func = JNI_FastGetField::generate_fast_get_short_field();
3547 if (func != (address)-1) {
3548 jni_NativeInterface.GetShortField = (GetShortField_t)func;
3549 }
3550 func = JNI_FastGetField::generate_fast_get_int_field();
3551 if (func != (address)-1) {
3552 jni_NativeInterface.GetIntField = (GetIntField_t)func;
3553 }
3554 func = JNI_FastGetField::generate_fast_get_long_field();
3555 if (func != (address)-1) {
3556 jni_NativeInterface.GetLongField = (GetLongField_t)func;
3557 }
3558 func = JNI_FastGetField::generate_fast_get_float_field();
3559 if (func != (address)-1) {
3560 jni_NativeInterface.GetFloatField = (GetFloatField_t)func;
3561 }
3562 func = JNI_FastGetField::generate_fast_get_double_field();
3563 if (func != (address)-1) {
3564 jni_NativeInterface.GetDoubleField = (GetDoubleField_t)func;
3565 }
3566 }
3567 }
3568
3569 // Returns the function structure
3570 struct JNINativeInterface_* jni_functions() {
3571 #if INCLUDE_JNI_CHECK
3572 if (CheckJNICalls) return jni_functions_check();
3573 #endif // INCLUDE_JNI_CHECK
3574 return &jni_NativeInterface;
3575 }
3576
3577 // Returns the function structure
3578 struct JNINativeInterface_* jni_functions_nocheck() {
3579 return &jni_NativeInterface;
3580 }
3581
3582
3583 // Invocation API
3584
3585
3586 // Forward declaration
3587 extern const struct JNIInvokeInterface_ jni_InvokeInterface;
3588
3589 // Global invocation API vars
3590 enum VM_Creation_State {
3591 NOT_CREATED = 0,
3592 IN_PROGRESS, // Most JNI operations are permitted during this phase to
3593 // allow for initialization actions by libraries and agents.
3594 COMPLETE
3595 };
3596
3597 volatile VM_Creation_State vm_created = NOT_CREATED;
3598
3599 // Indicate whether it is safe to recreate VM. Recreation is only
3600 // possible after a failed initial creation attempt in some cases.
3601 volatile int safe_to_recreate_vm = 1;
3602 struct JavaVM_ main_vm = {&jni_InvokeInterface};
3603
3604
3605 #define JAVASTACKSIZE (400 * 1024) /* Default size of a thread java stack */
3606 enum { VERIFY_NONE, VERIFY_REMOTE, VERIFY_ALL };
3607
3608 DT_RETURN_MARK_DECL(GetDefaultJavaVMInitArgs, jint
3609 , HOTSPOT_JNI_GETDEFAULTJAVAVMINITARGS_RETURN(_ret_ref));
3610
3611 _JNI_IMPORT_OR_EXPORT_ jint JNICALL JNI_GetDefaultJavaVMInitArgs(void *args_) {
3612 HOTSPOT_JNI_GETDEFAULTJAVAVMINITARGS_ENTRY(args_);
3613 JDK1_1InitArgs *args = (JDK1_1InitArgs *)args_;
3614 jint ret = JNI_ERR;
3615 DT_RETURN_MARK(GetDefaultJavaVMInitArgs, jint, (const jint&)ret);
3616
3617 if (Threads::is_supported_jni_version(args->version)) {
3618 ret = JNI_OK;
3619 }
3620 // 1.1 style no longer supported in hotspot.
3621 // According the JNI spec, we should update args->version on return.
3622 // We also use the structure to communicate with launcher about default
3623 // stack size.
3624 if (args->version == JNI_VERSION_1_1) {
3625 args->version = JNI_VERSION_1_2;
3626 // javaStackSize is int in arguments structure
3627 assert(jlong(ThreadStackSize) * K < INT_MAX, "integer overflow");
3628 args->javaStackSize = (jint)(ThreadStackSize * K);
3629 }
3630 return ret;
3631 }
3632
3633 DT_RETURN_MARK_DECL(CreateJavaVM, jint
3634 , HOTSPOT_JNI_CREATEJAVAVM_RETURN(_ret_ref));
3635
3636 static jint JNI_CreateJavaVM_inner(JavaVM **vm, void **penv, void *args) {
3637 HOTSPOT_JNI_CREATEJAVAVM_ENTRY((void **) vm, penv, args);
3638
3639 jint result = JNI_ERR;
3640 DT_RETURN_MARK(CreateJavaVM, jint, (const jint&)result);
3641
3642 // We're about to use Atomic::xchg for synchronization. Some Zero
3643 // platforms use the GCC builtin __sync_lock_test_and_set for this,
3644 // but __sync_lock_test_and_set is not guaranteed to do what we want
3645 // on all architectures. So we check it works before relying on it.
3646 #if defined(ZERO) && defined(ASSERT)
3647 {
3648 jint a = 0xcafebabe;
3649 jint b = Atomic::xchg(&a, (jint) 0xdeadbeef);
3650 void *c = &a;
3651 void *d = Atomic::xchg(&c, &b);
3652 assert(a == (jint) 0xdeadbeef && b == (jint) 0xcafebabe, "Atomic::xchg() works");
3653 assert(c == &b && d == &a, "Atomic::xchg() works");
3654 }
3655 #endif // ZERO && ASSERT
3656
3657 // At the moment it's only possible to have one Java VM,
3658 // since some of the runtime state is in global variables.
3659
3660 // We cannot use our mutex locks here, since they only work on
3661 // Threads. We do an atomic compare and exchange to ensure only
3662 // one thread can call this method at a time
3663
3664 // We use Atomic::xchg rather than Atomic::add/dec since on some platforms
3665 // the add/dec implementations are dependent on whether we are running
3666 // on a multiprocessor Atomic::xchg does not have this problem.
3667 if (Atomic::xchg(&vm_created, IN_PROGRESS) != NOT_CREATED) {
3668 return JNI_EEXIST; // already created, or create attempt in progress
3669 }
3670
3671 // If a previous creation attempt failed but can be retried safely,
3672 // then safe_to_recreate_vm will have been reset to 1 after being
3673 // cleared here. If a previous creation attempt succeeded and we then
3674 // destroyed that VM, we will be prevented from trying to recreate
3675 // the VM in the same process, as the value will still be 0.
3676 if (Atomic::xchg(&safe_to_recreate_vm, 0) == 0) {
3677 return JNI_ERR;
3678 }
3679
3680 /**
3681 * Certain errors during initialization are recoverable and do not
3682 * prevent this method from being called again at a later time
3683 * (perhaps with different arguments). However, at a certain
3684 * point during initialization if an error occurs we cannot allow
3685 * this function to be called again (or it will crash). In those
3686 * situations, the 'canTryAgain' flag is set to false, which atomically
3687 * sets safe_to_recreate_vm to 1, such that any new call to
3688 * JNI_CreateJavaVM will immediately fail using the above logic.
3689 */
3690 bool can_try_again = true;
3691
3692 result = Threads::create_vm((JavaVMInitArgs*) args, &can_try_again);
3693 if (result == JNI_OK) {
3694 JavaThread *thread = JavaThread::current();
3695 assert(!thread->has_pending_exception(), "should have returned not OK");
3696 // thread is thread_in_vm here
3697 *vm = (JavaVM *)(&main_vm);
3698 *(JNIEnv**)penv = thread->jni_environment();
3699 // mark creation complete for other JNI ops
3700 Atomic::release_store(&vm_created, COMPLETE);
3701
3702 #if INCLUDE_JVMCI
3703 if (EnableJVMCI) {
3704 if (UseJVMCICompiler) {
3705 // JVMCI is initialized on a CompilerThread
3706 if (BootstrapJVMCI) {
3707 JavaThread* THREAD = thread; // For exception macros.
3708 JVMCICompiler* compiler = JVMCICompiler::instance(true, CATCH);
3709 compiler->bootstrap(THREAD);
3710 if (HAS_PENDING_EXCEPTION) {
3711 HandleMark hm(THREAD);
3712 vm_exit_during_initialization(Handle(THREAD, PENDING_EXCEPTION));
3713 }
3714 }
3715 }
3716 }
3717 #endif
3718
3719 // Notify JVMTI
3720 if (JvmtiExport::should_post_thread_life()) {
3721 JvmtiExport::post_thread_start(thread);
3722 }
3723
3724 JFR_ONLY(Jfr::on_thread_start(thread);)
3725
3726 if (ReplayCompiles) ciReplay::replay(thread);
3727
3728 #ifdef ASSERT
3729 // Some platforms (like Win*) need a wrapper around these test
3730 // functions in order to properly handle error conditions.
3731 if (ErrorHandlerTest != 0) {
3732 VMError::controlled_crash(ErrorHandlerTest);
3733 }
3734 #endif
3735
3736 // Since this is not a JVM_ENTRY we have to set the thread state manually before leaving.
3737 ThreadStateTransition::transition_from_vm(thread, _thread_in_native);
3738 MACOS_AARCH64_ONLY(thread->enable_wx(WXExec));
3739 } else {
3740 // If create_vm exits because of a pending exception, exit with that
3741 // exception. In the future when we figure out how to reclaim memory,
3742 // we may be able to exit with JNI_ERR and allow the calling application
3743 // to continue.
3744 if (Universe::is_fully_initialized()) {
3745 // otherwise no pending exception possible - VM will already have aborted
3746 Thread* current = Thread::current_or_null();
3747 if (current != nullptr) {
3748 JavaThread* THREAD = JavaThread::cast(current); // For exception macros.
3749 assert(HAS_PENDING_EXCEPTION, "must be - else no current thread exists");
3750 HandleMark hm(THREAD);
3751 vm_exit_during_initialization(Handle(THREAD, PENDING_EXCEPTION));
3752 }
3753 }
3754
3755 if (can_try_again) {
3756 // reset safe_to_recreate_vm to 1 so that retrial would be possible
3757 safe_to_recreate_vm = 1;
3758 }
3759
3760 // Creation failed. We must reset vm_created
3761 *vm = nullptr;
3762 *(JNIEnv**)penv = nullptr;
3763 // reset vm_created last to avoid race condition. Use OrderAccess to
3764 // control both compiler and architectural-based reordering.
3765 assert(vm_created == IN_PROGRESS, "must be");
3766 Atomic::release_store(&vm_created, NOT_CREATED);
3767 }
3768
3769 // Flush stdout and stderr before exit.
3770 fflush(stdout);
3771 fflush(stderr);
3772
3773 return result;
3774
3775 }
3776
3777 _JNI_IMPORT_OR_EXPORT_ jint JNICALL JNI_CreateJavaVM(JavaVM **vm, void **penv, void *args) {
3778 jint result = JNI_ERR;
3779 // On Windows, let CreateJavaVM run with SEH protection
3780 #if defined(_WIN32) && !defined(USE_VECTORED_EXCEPTION_HANDLING)
3781 __try {
3782 #endif
3783 result = JNI_CreateJavaVM_inner(vm, penv, args);
3784 #if defined(_WIN32) && !defined(USE_VECTORED_EXCEPTION_HANDLING)
3785 } __except(topLevelExceptionFilter((_EXCEPTION_POINTERS*)_exception_info())) {
3786 // Nothing to do.
3787 }
3788 #endif
3789 return result;
3790 }
3791
3792 _JNI_IMPORT_OR_EXPORT_ jint JNICALL JNI_GetCreatedJavaVMs(JavaVM **vm_buf, jsize bufLen, jsize *numVMs) {
3793 HOTSPOT_JNI_GETCREATEDJAVAVMS_ENTRY((void **) vm_buf, bufLen, (uintptr_t *) numVMs);
3794
3795 if (vm_created == COMPLETE) {
3796 if (numVMs != nullptr) *numVMs = 1;
3797 if (bufLen > 0) *vm_buf = (JavaVM *)(&main_vm);
3798 } else {
3799 if (numVMs != nullptr) *numVMs = 0;
3800 }
3801 HOTSPOT_JNI_GETCREATEDJAVAVMS_RETURN(JNI_OK);
3802 return JNI_OK;
3803 }
3804
3805 extern "C" {
3806
3807 DT_RETURN_MARK_DECL(DestroyJavaVM, jint
3808 , HOTSPOT_JNI_DESTROYJAVAVM_RETURN(_ret_ref));
3809
3810 static jint JNICALL jni_DestroyJavaVM_inner(JavaVM *vm) {
3811 HOTSPOT_JNI_DESTROYJAVAVM_ENTRY(vm);
3812 jint res = JNI_ERR;
3813 DT_RETURN_MARK(DestroyJavaVM, jint, (const jint&)res);
3814
3815 if (vm_created == NOT_CREATED) {
3816 res = JNI_ERR;
3817 return res;
3818 }
3819
3820 JNIEnv *env;
3821 JavaVMAttachArgs destroyargs;
3822 destroyargs.version = CurrentVersion;
3823 destroyargs.name = (char *)"DestroyJavaVM";
3824 destroyargs.group = nullptr;
3825 res = vm->AttachCurrentThread((void **)&env, (void *)&destroyargs);
3826 if (res != JNI_OK) {
3827 return res;
3828 }
3829
3830 JavaThread* thread = JavaThread::current();
3831
3832 // Make sure we are actually in a newly attached thread, with no
3833 // existing Java frame.
3834 if (thread->has_last_Java_frame()) {
3835 return JNI_ERR;
3836 }
3837
3838 // Since this is not a JVM_ENTRY we have to set the thread state manually before entering.
3839
3840 // We are going to VM, change W^X state to the expected one.
3841 MACOS_AARCH64_ONLY(WXMode oldmode = thread->enable_wx(WXWrite));
3842
3843 ThreadStateTransition::transition_from_native(thread, _thread_in_vm);
3844 Threads::destroy_vm();
3845 // Don't bother restoring thread state, VM is gone.
3846 vm_created = NOT_CREATED;
3847 return JNI_OK;
3848 }
3849
3850 jint JNICALL jni_DestroyJavaVM(JavaVM *vm) {
3851 jint result = JNI_ERR;
3852 // On Windows, we need SEH protection
3853 #if defined(_WIN32) && !defined(USE_VECTORED_EXCEPTION_HANDLING)
3854 __try {
3855 #endif
3856 result = jni_DestroyJavaVM_inner(vm);
3857 #if defined(_WIN32) && !defined(USE_VECTORED_EXCEPTION_HANDLING)
3858 } __except(topLevelExceptionFilter((_EXCEPTION_POINTERS*)_exception_info())) {
3859 // Nothing to do.
3860 }
3861 #endif
3862 return result;
3863 }
3864
3865 static jint attach_current_thread(JavaVM *vm, void **penv, void *_args, bool daemon) {
3866 JavaVMAttachArgs *args = (JavaVMAttachArgs *) _args;
3867
3868 // Check below commented out from JDK1.2fcs as well
3869 /*
3870 if (args && (args->version != JNI_VERSION_1_1 || args->version != JNI_VERSION_1_2)) {
3871 return JNI_EVERSION;
3872 }
3873 */
3874
3875 Thread* t = Thread::current_or_null();
3876 if (t != nullptr) {
3877 // If executing from an atexit hook we may be in the VMThread.
3878 if (t->is_Java_thread()) {
3879 // If the thread has been attached this operation is a no-op
3880 *(JNIEnv**)penv = JavaThread::cast(t)->jni_environment();
3881 return JNI_OK;
3882 } else {
3883 return JNI_ERR;
3884 }
3885 }
3886
3887 // Create a thread and mark it as attaching so it will be skipped by the
3888 // ThreadsListEnumerator - see CR 6404306
3889 JavaThread* thread = JavaThread::create_attaching_thread();
3890
3891 // Set correct safepoint info. The thread is going to call into Java when
3892 // initializing the Java level thread object. Hence, the correct state must
3893 // be set in order for the Safepoint code to deal with it correctly.
3894 thread->set_thread_state(_thread_in_vm);
3895 thread->record_stack_base_and_size();
3896 thread->register_thread_stack_with_NMT();
3897 thread->initialize_thread_current();
3898 MACOS_AARCH64_ONLY(thread->init_wx());
3899
3900 if (!os::create_attached_thread(thread)) {
3901 thread->smr_delete();
3902 return JNI_ERR;
3903 }
3904 // Enable stack overflow checks
3905 thread->stack_overflow_state()->create_stack_guard_pages();
3906
3907 thread->initialize_tlab();
3908
3909 thread->cache_global_variables();
3910
3911 // This thread will not do a safepoint check, since it has
3912 // not been added to the Thread list yet.
3913 { MutexLocker ml(Threads_lock);
3914 // This must be inside this lock in order to get FullGCALot to work properly, i.e., to
3915 // avoid this thread trying to do a GC before it is added to the thread-list
3916 thread->set_active_handles(JNIHandleBlock::allocate_block());
3917 Threads::add(thread, daemon);
3918 }
3919 // Create thread group and name info from attach arguments
3920 oop group = nullptr;
3921 char* thread_name = nullptr;
3922 if (args != nullptr && Threads::is_supported_jni_version(args->version)) {
3923 group = JNIHandles::resolve(args->group);
3924 thread_name = args->name; // may be null
3925 }
3926 if (group == nullptr) group = Universe::main_thread_group();
3927
3928 // Create Java level thread object and attach it to this thread
3929 bool attach_failed = false;
3930 {
3931 EXCEPTION_MARK;
3932 HandleMark hm(THREAD);
3933 Handle thread_group(THREAD, group);
3934 thread->allocate_threadObj(thread_group, thread_name, daemon, THREAD);
3935 if (HAS_PENDING_EXCEPTION) {
3936 CLEAR_PENDING_EXCEPTION;
3937 // cleanup outside the handle mark.
3938 attach_failed = true;
3939 }
3940 }
3941
3942 if (attach_failed) {
3943 // Added missing cleanup
3944 thread->cleanup_failed_attach_current_thread(daemon);
3945 return JNI_ERR;
3946 }
3947
3948 // mark the thread as no longer attaching
3949 // this uses a fence to push the change through so we don't have
3950 // to regrab the threads_lock
3951 thread->set_done_attaching_via_jni();
3952
3953 // Set java thread status.
3954 java_lang_Thread::set_thread_status(thread->threadObj(),
3955 JavaThreadStatus::RUNNABLE);
3956
3957 // Notify the debugger
3958 if (JvmtiExport::should_post_thread_life()) {
3959 JvmtiExport::post_thread_start(thread);
3960 }
3961
3962 JFR_ONLY(Jfr::on_thread_start(thread);)
3963
3964 *(JNIEnv**)penv = thread->jni_environment();
3965
3966 // Now leaving the VM, so change thread_state. This is normally automatically taken care
3967 // of in the JVM_ENTRY. But in this situation we have to do it manually.
3968 ThreadStateTransition::transition_from_vm(thread, _thread_in_native);
3969 MACOS_AARCH64_ONLY(thread->enable_wx(WXExec));
3970
3971 // Perform any platform dependent FPU setup
3972 os::setup_fpu();
3973
3974 return JNI_OK;
3975 }
3976
3977
3978 jint JNICALL jni_AttachCurrentThread(JavaVM *vm, void **penv, void *_args) {
3979 HOTSPOT_JNI_ATTACHCURRENTTHREAD_ENTRY(vm, penv, _args);
3980 if (vm_created == NOT_CREATED) {
3981 // Not sure how we could possibly get here.
3982 HOTSPOT_JNI_ATTACHCURRENTTHREAD_RETURN((uint32_t) JNI_ERR);
3983 return JNI_ERR;
3984 }
3985
3986 jint ret = attach_current_thread(vm, penv, _args, false);
3987 HOTSPOT_JNI_ATTACHCURRENTTHREAD_RETURN(ret);
3988 return ret;
3989 }
3990
3991
3992 jint JNICALL jni_DetachCurrentThread(JavaVM *vm) {
3993 HOTSPOT_JNI_DETACHCURRENTTHREAD_ENTRY(vm);
3994 if (vm_created == NOT_CREATED) {
3995 // Not sure how we could possibly get here.
3996 HOTSPOT_JNI_DETACHCURRENTTHREAD_RETURN(JNI_ERR);
3997 return JNI_ERR;
3998 }
3999
4000 Thread* current = Thread::current_or_null();
4001
4002 // If the thread has already been detached the operation is a no-op
4003 if (current == nullptr) {
4004 HOTSPOT_JNI_DETACHCURRENTTHREAD_RETURN(JNI_OK);
4005 return JNI_OK;
4006 }
4007
4008 // If executing from an atexit hook we may be in the VMThread.
4009 if (!current->is_Java_thread()) {
4010 HOTSPOT_JNI_DETACHCURRENTTHREAD_RETURN((uint32_t) JNI_ERR);
4011 return JNI_ERR;
4012 }
4013
4014 VM_Exit::block_if_vm_exited();
4015
4016 JavaThread* thread = JavaThread::cast(current);
4017 if (thread->has_last_Java_frame()) {
4018 HOTSPOT_JNI_DETACHCURRENTTHREAD_RETURN((uint32_t) JNI_ERR);
4019 // Can't detach a thread that's running java, that can't work.
4020 return JNI_ERR;
4021 }
4022
4023 // We are going to VM, change W^X state to the expected one.
4024 MACOS_AARCH64_ONLY(thread->enable_wx(WXWrite));
4025
4026 // Safepoint support. Have to do call-back to safepoint code, if in the
4027 // middle of a safepoint operation
4028 ThreadStateTransition::transition_from_native(thread, _thread_in_vm);
4029
4030 // XXX: Note that JavaThread::exit() call below removes the guards on the
4031 // stack pages set up via enable_stack_{red,yellow}_zone() calls
4032 // above in jni_AttachCurrentThread. Unfortunately, while the setting
4033 // of the guards is visible in jni_AttachCurrentThread above,
4034 // the removal of the guards is buried below in JavaThread::exit()
4035 // here. The abstraction should be more symmetrically either exposed
4036 // or hidden (e.g. it could probably be hidden in the same
4037 // (platform-dependent) methods where we do alternate stack
4038 // maintenance work?)
4039 thread->exit(false, JavaThread::jni_detach);
4040 thread->smr_delete();
4041
4042 // Go to the execute mode, the initial state of the thread on creation.
4043 // Use os interface as the thread is not a JavaThread anymore.
4044 MACOS_AARCH64_ONLY(os::current_thread_enable_wx(WXExec));
4045
4046 HOTSPOT_JNI_DETACHCURRENTTHREAD_RETURN(JNI_OK);
4047 return JNI_OK;
4048 }
4049
4050 DT_RETURN_MARK_DECL(GetEnv, jint
4051 , HOTSPOT_JNI_GETENV_RETURN(_ret_ref));
4052
4053 jint JNICALL jni_GetEnv(JavaVM *vm, void **penv, jint version) {
4054 HOTSPOT_JNI_GETENV_ENTRY(vm, penv, version);
4055 jint ret = JNI_ERR;
4056 DT_RETURN_MARK(GetEnv, jint, (const jint&)ret);
4057
4058 if (vm_created == NOT_CREATED) {
4059 *penv = nullptr;
4060 ret = JNI_EDETACHED;
4061 return ret;
4062 }
4063
4064 if (JniExportedInterface::GetExportedInterface(vm, penv, version, &ret)) {
4065 return ret;
4066 }
4067
4068 #ifndef JVMPI_VERSION_1
4069 // need these in order to be polite about older agents
4070 #define JVMPI_VERSION_1 ((jint)0x10000001)
4071 #define JVMPI_VERSION_1_1 ((jint)0x10000002)
4072 #define JVMPI_VERSION_1_2 ((jint)0x10000003)
4073 #endif // !JVMPI_VERSION_1
4074
4075 Thread* thread = Thread::current_or_null();
4076 if (thread != nullptr && thread->is_Java_thread()) {
4077 if (Threads::is_supported_jni_version_including_1_1(version)) {
4078 *(JNIEnv**)penv = JavaThread::cast(thread)->jni_environment();
4079 ret = JNI_OK;
4080 return ret;
4081
4082 } else if (version == JVMPI_VERSION_1 ||
4083 version == JVMPI_VERSION_1_1 ||
4084 version == JVMPI_VERSION_1_2) {
4085 tty->print_cr("ERROR: JVMPI, an experimental interface, is no longer supported.");
4086 tty->print_cr("Please use the supported interface: the JVM Tool Interface (JVM TI).");
4087 ret = JNI_EVERSION;
4088 return ret;
4089 } else if (JvmtiExport::is_jvmdi_version(version)) {
4090 tty->print_cr("FATAL ERROR: JVMDI is no longer supported.");
4091 tty->print_cr("Please use the supported interface: the JVM Tool Interface (JVM TI).");
4092 ret = JNI_EVERSION;
4093 return ret;
4094 } else {
4095 *penv = nullptr;
4096 ret = JNI_EVERSION;
4097 return ret;
4098 }
4099 } else {
4100 *penv = nullptr;
4101 ret = JNI_EDETACHED;
4102 return ret;
4103 }
4104 }
4105
4106
4107 jint JNICALL jni_AttachCurrentThreadAsDaemon(JavaVM *vm, void **penv, void *_args) {
4108 HOTSPOT_JNI_ATTACHCURRENTTHREADASDAEMON_ENTRY(vm, penv, _args);
4109 if (vm_created == NOT_CREATED) {
4110 // Not sure how we could possibly get here.
4111 HOTSPOT_JNI_ATTACHCURRENTTHREADASDAEMON_RETURN((uint32_t) JNI_ERR);
4112 return JNI_ERR;
4113 }
4114
4115 jint ret = attach_current_thread(vm, penv, _args, true);
4116 HOTSPOT_JNI_ATTACHCURRENTTHREADASDAEMON_RETURN(ret);
4117 return ret;
4118 }
4119
4120
4121 } // End extern "C"
4122
4123 const struct JNIInvokeInterface_ jni_InvokeInterface = {
4124 nullptr,
4125 nullptr,
4126 nullptr,
4127
4128 jni_DestroyJavaVM,
4129 jni_AttachCurrentThread,
4130 jni_DetachCurrentThread,
4131 jni_GetEnv,
4132 jni_AttachCurrentThreadAsDaemon
4133 };