1 /*
2 * Copyright (c) 1997, 2026, 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 "ci/ciReplay.hpp"
28 #include "classfile/altHashing.hpp"
29 #include "classfile/classFileStream.hpp"
30 #include "classfile/classLoader.hpp"
31 #include "classfile/classLoadInfo.hpp"
32 #include "classfile/javaClasses.inline.hpp"
33 #include "classfile/javaThreadStatus.hpp"
34 #include "classfile/moduleEntry.hpp"
35 #include "classfile/modules.hpp"
36 #include "classfile/symbolTable.hpp"
37 #include "classfile/systemDictionary.hpp"
38 #include "classfile/vmClasses.hpp"
39 #include "classfile/vmSymbols.hpp"
40 #include "compiler/compiler_globals.hpp"
41 #include "gc/shared/collectedHeap.hpp"
42 #include "gc/shared/stringdedup/stringDedup.hpp"
43 #include "interpreter/linkResolver.hpp"
44 #include "jni.h"
45 #include "jvm.h"
46 #include "logging/log.hpp"
47 #include "memory/allocation.inline.hpp"
48 #include "memory/oopFactory.hpp"
49 #include "memory/resourceArea.hpp"
50 #include "memory/universe.hpp"
51 #include "nmt/memTracker.hpp"
52 #include "oops/access.inline.hpp"
53 #include "oops/arrayOop.hpp"
54 #include "oops/instanceKlass.inline.hpp"
55 #include "oops/instanceOop.hpp"
56 #include "oops/klass.inline.hpp"
57 #include "oops/markWord.hpp"
58 #include "oops/method.hpp"
59 #include "oops/objArrayKlass.hpp"
60 #include "oops/objArrayOop.inline.hpp"
61 #include "oops/oop.inline.hpp"
62 #include "oops/symbol.hpp"
63 #include "oops/typeArrayKlass.hpp"
64 #include "oops/typeArrayOop.inline.hpp"
65 #include "prims/jniCheck.hpp"
66 #include "prims/jniExport.hpp"
67 #include "prims/jniFastGetField.hpp"
68 #include "prims/jvm_misc.hpp"
69 #include "prims/jvmtiExport.hpp"
70 #include "prims/jvmtiThreadState.hpp"
71 #include "runtime/arguments.hpp"
72 #include "runtime/atomicAccess.hpp"
73 #include "runtime/fieldDescriptor.inline.hpp"
74 #include "runtime/handles.inline.hpp"
75 #include "runtime/interfaceSupport.inline.hpp"
76 #include "runtime/java.hpp"
77 #include "runtime/javaCalls.hpp"
78 #include "runtime/javaThread.inline.hpp"
79 #include "runtime/jfieldIDWorkaround.hpp"
80 #include "runtime/jniHandles.inline.hpp"
81 #include "runtime/reflection.hpp"
82 #include "runtime/safepointVerifiers.hpp"
83 #include "runtime/sharedRuntime.hpp"
84 #include "runtime/signature.hpp"
85 #include "runtime/synchronizer.hpp"
86 #include "runtime/thread.inline.hpp"
87 #include "runtime/vmOperations.hpp"
88 #include "services/runtimeService.hpp"
89 #include "utilities/defaultStream.hpp"
90 #include "utilities/dtrace.hpp"
91 #include "utilities/events.hpp"
92 #include "utilities/macros.hpp"
93 #include "utilities/vmError.hpp"
94 #if INCLUDE_JVMCI
95 #include "jvmci/jvmciCompiler.hpp"
96 #endif
97 #if INCLUDE_JFR
98 #include "jfr/jfr.hpp"
99 #endif
100
101 static jint CurrentVersion = JNI_VERSION_24;
102
103 #if defined(_WIN32) && !defined(USE_VECTORED_EXCEPTION_HANDLING)
104 extern LONG WINAPI topLevelExceptionFilter(_EXCEPTION_POINTERS* );
105 #endif
106
107 // The DT_RETURN_MARK macros create a scoped object to fire the dtrace
108 // '-return' probe regardless of the return path is taken out of the function.
109 // Methods that have multiple return paths use this to avoid having to
110 // instrument each return path. Methods that use CHECK or THROW must use this
111 // since those macros can cause an immediate uninstrumented return.
112 //
113 // In order to get the return value, a reference to the variable containing
114 // the return value must be passed to the constructor of the object, and
115 // the return value must be set before return (since the mark object has
116 // a reference to it).
117 //
118 // Example:
119 // DT_RETURN_MARK_DECL(SomeFunc, int);
120 // JNI_ENTRY(int, SomeFunc, ...)
121 // int return_value = 0;
122 // DT_RETURN_MARK(SomeFunc, int, (const int&)return_value);
123 // foo(CHECK_0)
124 // return_value = 5;
125 // return return_value;
126 // JNI_END
127 #define DT_RETURN_MARK_DECL(name, type, probe) \
128 DTRACE_ONLY( \
129 class DTraceReturnProbeMark_##name { \
130 public: \
131 const type& _ret_ref; \
132 DTraceReturnProbeMark_##name(const type& v) : _ret_ref(v) {} \
133 ~DTraceReturnProbeMark_##name() { \
134 probe; \
135 } \
136 } \
137 )
138 // Void functions are simpler since there's no return value
139 #define DT_VOID_RETURN_MARK_DECL(name, probe) \
140 DTRACE_ONLY( \
141 class DTraceReturnProbeMark_##name { \
142 public: \
143 ~DTraceReturnProbeMark_##name() { \
144 probe; \
145 } \
146 } \
147 )
148
149 // Place these macros in the function to mark the return. Non-void
150 // functions need the type and address of the return value.
151 #define DT_RETURN_MARK(name, type, ref) \
152 DTRACE_ONLY( DTraceReturnProbeMark_##name dtrace_return_mark(ref) )
153 #define DT_VOID_RETURN_MARK(name) \
154 DTRACE_ONLY( DTraceReturnProbeMark_##name dtrace_return_mark )
155
156
157 // Use these to select distinct code for floating-point vs. non-floating point
158 // situations. Used from within common macros where we need slightly
159 // different behavior for Float/Double
160 #define FP_SELECT_Boolean(intcode, fpcode) intcode
161 #define FP_SELECT_Byte(intcode, fpcode) intcode
162 #define FP_SELECT_Char(intcode, fpcode) intcode
163 #define FP_SELECT_Short(intcode, fpcode) intcode
164 #define FP_SELECT_Object(intcode, fpcode) intcode
165 #define FP_SELECT_Int(intcode, fpcode) intcode
166 #define FP_SELECT_Long(intcode, fpcode) intcode
167 #define FP_SELECT_Float(intcode, fpcode) fpcode
168 #define FP_SELECT_Double(intcode, fpcode) fpcode
169 #define FP_SELECT(TypeName, intcode, fpcode) \
170 FP_SELECT_##TypeName(intcode, fpcode)
171
172 // Choose DT_RETURN_MARK macros based on the type: float/double -> void
173 // (dtrace doesn't do FP yet)
174 #define DT_RETURN_MARK_DECL_FOR(TypeName, name, type, probe) \
175 FP_SELECT(TypeName, \
176 DT_RETURN_MARK_DECL(name, type, probe), DT_VOID_RETURN_MARK_DECL(name, probe) )
177 #define DT_RETURN_MARK_FOR(TypeName, name, type, ref) \
178 FP_SELECT(TypeName, \
179 DT_RETURN_MARK(name, type, ref), DT_VOID_RETURN_MARK(name) )
180
181
182 // out-of-line helpers for class jfieldIDWorkaround:
183
184 bool jfieldIDWorkaround::is_valid_jfieldID(Klass* k, jfieldID id) {
185 if (jfieldIDWorkaround::is_instance_jfieldID(k, id)) {
186 uintptr_t as_uint = (uintptr_t) id;
187 int offset = raw_instance_offset(id);
188 if (is_checked_jfieldID(id)) {
189 if (!klass_hash_ok(k, id)) {
190 return false;
191 }
192 }
193 return InstanceKlass::cast(k)->contains_field_offset(offset);
194 } else {
195 JNIid* result = (JNIid*) id;
196 #ifdef ASSERT
197 return result != nullptr && result->is_static_field_id();
198 #else
199 return result != nullptr;
200 #endif
201 }
202 }
203
204
205 intptr_t jfieldIDWorkaround::encode_klass_hash(Klass* k, int offset) {
206 if (offset <= small_offset_mask) {
207 Klass* field_klass = k;
208 Klass* super_klass = field_klass->super();
209 // With compressed oops the most super class with nonstatic fields would
210 // be the owner of fields embedded in the header.
211 while (InstanceKlass::cast(super_klass)->has_nonstatic_fields() &&
212 InstanceKlass::cast(super_klass)->contains_field_offset(offset)) {
213 field_klass = super_klass; // super contains the field also
214 super_klass = field_klass->super();
215 }
216 DEBUG_ONLY(NoSafepointVerifier nosafepoint;)
217 uintptr_t klass_hash = field_klass->identity_hash();
218 return ((klass_hash & klass_mask) << klass_shift) | checked_mask_in_place;
219 } else {
220 #if 0
221 #ifndef PRODUCT
222 {
223 ResourceMark rm;
224 warning("VerifyJNIFields: long offset %d in %s", offset, k->external_name());
225 }
226 #endif
227 #endif
228 return 0;
229 }
230 }
231
232 bool jfieldIDWorkaround::klass_hash_ok(Klass* k, jfieldID id) {
233 uintptr_t as_uint = (uintptr_t) id;
234 intptr_t klass_hash = (as_uint >> klass_shift) & klass_mask;
235 do {
236 DEBUG_ONLY(NoSafepointVerifier nosafepoint;)
237 // Could use a non-blocking query for identity_hash here...
238 if ((k->identity_hash() & klass_mask) == klass_hash)
239 return true;
240 k = k->super();
241 } while (k != nullptr);
242 return false;
243 }
244
245 void jfieldIDWorkaround::verify_instance_jfieldID(Klass* k, jfieldID id) {
246 guarantee(jfieldIDWorkaround::is_instance_jfieldID(k, id), "must be an instance field" );
247 uintptr_t as_uint = (uintptr_t) id;
248 int offset = raw_instance_offset(id);
249 if (VerifyJNIFields) {
250 if (is_checked_jfieldID(id)) {
251 guarantee(klass_hash_ok(k, id),
252 "Bug in native code: jfieldID class must match object");
253 } else {
254 #if 0
255 #ifndef PRODUCT
256 if (Verbose) {
257 ResourceMark rm;
258 warning("VerifyJNIFields: unverified offset %d for %s", offset, k->external_name());
259 }
260 #endif
261 #endif
262 }
263 }
264 guarantee(InstanceKlass::cast(k)->contains_field_offset(offset),
265 "Bug in native code: jfieldID offset must address interior of object");
266 }
267
268 // Implementation of JNI entries
269
270 DT_RETURN_MARK_DECL(DefineClass, jclass
271 , HOTSPOT_JNI_DEFINECLASS_RETURN(_ret_ref));
272
273 JNI_ENTRY(jclass, jni_DefineClass(JNIEnv *env, const char *name, jobject loaderRef,
274 const jbyte *buf, jsize bufLen))
275 HOTSPOT_JNI_DEFINECLASS_ENTRY(
276 env, (char*) name, loaderRef, (char*) buf, bufLen);
277
278 jclass cls = nullptr;
279 DT_RETURN_MARK(DefineClass, jclass, (const jclass&)cls);
280
281 // Class resolution will get the class name from the .class stream if the name is null.
282 TempNewSymbol class_name = name == nullptr ? nullptr :
283 SystemDictionary::class_name_symbol(name, vmSymbols::java_lang_NoClassDefFoundError(),
284 CHECK_NULL);
285
286 ResourceMark rm(THREAD);
287 ClassFileStream st((u1*)buf, bufLen, nullptr);
288 Handle class_loader (THREAD, JNIHandles::resolve(loaderRef));
289 Handle protection_domain;
290 ClassLoadInfo cl_info(protection_domain);
291 Klass* k = SystemDictionary::resolve_from_stream(&st, class_name,
292 class_loader,
293 cl_info,
294 CHECK_NULL);
295
296 if (log_is_enabled(Debug, class, resolve)) {
297 trace_class_resolution(k);
298 }
299
300 cls = (jclass)JNIHandles::make_local(THREAD, k->java_mirror());
301 return cls;
302 JNI_END
303
304
305
306 DT_RETURN_MARK_DECL(FindClass, jclass
307 , HOTSPOT_JNI_FINDCLASS_RETURN(_ret_ref));
308
309 JNI_ENTRY(jclass, jni_FindClass(JNIEnv *env, const char *name))
310 HOTSPOT_JNI_FINDCLASS_ENTRY(env, (char *)name);
311
312 jclass result = nullptr;
313 DT_RETURN_MARK(FindClass, jclass, (const jclass&)result);
314
315 // This should be ClassNotFoundException imo.
316 TempNewSymbol class_name =
317 SystemDictionary::class_name_symbol(name, vmSymbols::java_lang_NoClassDefFoundError(),
318 CHECK_NULL);
319
320 // Find calling class
321 Klass* k = thread->security_get_caller_class(0);
322 // default to the system loader when no context
323 Handle loader(THREAD, SystemDictionary::java_system_loader());
324 if (k != nullptr) {
325 // Special handling to make sure JNI_OnLoad and JNI_OnUnload are executed
326 // in the correct class context.
327 if (k->class_loader() == nullptr &&
328 k->name() == vmSymbols::jdk_internal_loader_NativeLibraries()) {
329 JavaValue result(T_OBJECT);
330 JavaCalls::call_static(&result, k,
331 vmSymbols::getFromClass_name(),
332 vmSymbols::void_class_signature(),
333 CHECK_NULL);
334 // When invoked from JNI_OnLoad, NativeLibraries::getFromClass returns
335 // a non-null Class object. When invoked from JNI_OnUnload,
336 // it will return null to indicate no context.
337 oop mirror = result.get_oop();
338 if (mirror != nullptr) {
339 Klass* fromClass = java_lang_Class::as_Klass(mirror);
340 loader = Handle(THREAD, fromClass->class_loader());
341 }
342 } else {
343 loader = Handle(THREAD, k->class_loader());
344 }
345 }
346
347 result = find_class_from_class_loader(env, class_name, true, loader, true, thread);
348
349 if (log_is_enabled(Debug, class, resolve) && result != nullptr) {
350 trace_class_resolution(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(result)));
351 }
352
353 return result;
354 JNI_END
355
356 DT_RETURN_MARK_DECL(FromReflectedMethod, jmethodID
357 , HOTSPOT_JNI_FROMREFLECTEDMETHOD_RETURN((uintptr_t)_ret_ref));
358
359 JNI_ENTRY(jmethodID, jni_FromReflectedMethod(JNIEnv *env, jobject method))
360 HOTSPOT_JNI_FROMREFLECTEDMETHOD_ENTRY(env, method);
361
362 jmethodID ret = nullptr;
363 DT_RETURN_MARK(FromReflectedMethod, jmethodID, (const jmethodID&)ret);
364
365 // method is a handle to a java.lang.reflect.Method object
366 oop reflected = JNIHandles::resolve_non_null(method);
367 oop mirror = nullptr;
368 int slot = 0;
369
370 if (reflected->klass() == vmClasses::reflect_Constructor_klass()) {
371 mirror = java_lang_reflect_Constructor::clazz(reflected);
372 slot = java_lang_reflect_Constructor::slot(reflected);
373 } else {
374 assert(reflected->klass() == vmClasses::reflect_Method_klass(), "wrong type");
375 mirror = java_lang_reflect_Method::clazz(reflected);
376 slot = java_lang_reflect_Method::slot(reflected);
377 }
378 Klass* k1 = java_lang_Class::as_Klass(mirror);
379
380 // Make sure class is initialized before handing id's out to methods
381 k1->initialize(CHECK_NULL);
382 Method* m = InstanceKlass::cast(k1)->method_with_idnum(slot);
383 ret = m==nullptr? nullptr : m->jmethod_id(); // return null if reflected method deleted
384 return ret;
385 JNI_END
386
387 DT_RETURN_MARK_DECL(FromReflectedField, jfieldID
388 , HOTSPOT_JNI_FROMREFLECTEDFIELD_RETURN((uintptr_t)_ret_ref));
389
390 JNI_ENTRY(jfieldID, jni_FromReflectedField(JNIEnv *env, jobject field))
391 HOTSPOT_JNI_FROMREFLECTEDFIELD_ENTRY(env, field);
392
393 jfieldID ret = nullptr;
394 DT_RETURN_MARK(FromReflectedField, jfieldID, (const jfieldID&)ret);
395
396 // field is a handle to a java.lang.reflect.Field object
397 oop reflected = JNIHandles::resolve_non_null(field);
398 oop mirror = java_lang_reflect_Field::clazz(reflected);
399 Klass* k1 = java_lang_Class::as_Klass(mirror);
400 int slot = java_lang_reflect_Field::slot(reflected);
401 int modifiers = java_lang_reflect_Field::modifiers(reflected);
402
403 // Make sure class is initialized before handing id's out to fields
404 k1->initialize(CHECK_NULL);
405
406 // First check if this is a static field
407 if (modifiers & JVM_ACC_STATIC) {
408 int offset = InstanceKlass::cast(k1)->field_offset( slot );
409 JNIid* id = InstanceKlass::cast(k1)->jni_id_for(offset);
410 assert(id != nullptr, "corrupt Field object");
411 DEBUG_ONLY(id->set_is_static_field_id();)
412 // A jfieldID for a static field is a JNIid specifying the field holder and the offset within the Klass*
413 ret = jfieldIDWorkaround::to_static_jfieldID(id);
414 return ret;
415 }
416
417 // The slot is the index of the field description in the field-array
418 // The jfieldID is the offset of the field within the object
419 // It may also have hash bits for k, if VerifyJNIFields is turned on.
420 int offset = InstanceKlass::cast(k1)->field_offset( slot );
421 assert(InstanceKlass::cast(k1)->contains_field_offset(offset), "stay within object");
422 ret = jfieldIDWorkaround::to_instance_jfieldID(k1, offset);
423 return ret;
424 JNI_END
425
426
427 DT_RETURN_MARK_DECL(ToReflectedMethod, jobject
428 , HOTSPOT_JNI_TOREFLECTEDMETHOD_RETURN(_ret_ref));
429
430 JNI_ENTRY(jobject, jni_ToReflectedMethod(JNIEnv *env, jclass cls, jmethodID method_id, jboolean isStatic))
431 HOTSPOT_JNI_TOREFLECTEDMETHOD_ENTRY(env, cls, (uintptr_t) method_id, isStatic);
432
433 jobject ret = nullptr;
434 DT_RETURN_MARK(ToReflectedMethod, jobject, (const jobject&)ret);
435
436 methodHandle m (THREAD, Method::resolve_jmethod_id(method_id));
437 assert(m->is_static() == (isStatic != 0), "jni_ToReflectedMethod access flags doesn't match");
438 oop reflection_method;
439 if (m->is_object_initializer()) {
440 reflection_method = Reflection::new_constructor(m, CHECK_NULL);
441 } else {
442 // Note: Static initializers can theoretically be here, if JNI users manage
443 // to get their jmethodID. Record them as plain methods.
444 reflection_method = Reflection::new_method(m, false, CHECK_NULL);
445 }
446 ret = JNIHandles::make_local(THREAD, reflection_method);
447 return ret;
448 JNI_END
449
450 DT_RETURN_MARK_DECL(GetSuperclass, jclass
451 , HOTSPOT_JNI_GETSUPERCLASS_RETURN(_ret_ref));
452
453 JNI_ENTRY(jclass, jni_GetSuperclass(JNIEnv *env, jclass sub))
454 HOTSPOT_JNI_GETSUPERCLASS_ENTRY(env, sub);
455
456 jclass obj = nullptr;
457 DT_RETURN_MARK(GetSuperclass, jclass, (const jclass&)obj);
458
459 oop mirror = JNIHandles::resolve_non_null(sub);
460 // primitive classes return null
461 if (java_lang_Class::is_primitive(mirror)) return nullptr;
462
463 // Rules of Class.getSuperClass as implemented by KLass::java_super:
464 // arrays return Object
465 // interfaces return null
466 // proper classes return Klass::super()
467 Klass* k = java_lang_Class::as_Klass(mirror);
468 if (k->is_interface()) return nullptr;
469
470 // return mirror for superclass
471 Klass* super = k->java_super();
472 // super2 is the value computed by the compiler's getSuperClass intrinsic:
473 DEBUG_ONLY(Klass* super2 = ( k->is_array_klass()
474 ? vmClasses::Object_klass()
475 : k->super() ) );
476 assert(super == super2,
477 "java_super computation depends on interface, array, other super");
478 obj = (super == nullptr) ? nullptr : (jclass) JNIHandles::make_local(THREAD, super->java_mirror());
479 return obj;
480 JNI_END
481
482 JNI_ENTRY_NO_PRESERVE(jboolean, jni_IsAssignableFrom(JNIEnv *env, jclass sub, jclass super))
483 HOTSPOT_JNI_ISASSIGNABLEFROM_ENTRY(env, sub, super);
484
485 oop sub_mirror = JNIHandles::resolve_non_null(sub);
486 oop super_mirror = JNIHandles::resolve_non_null(super);
487 if (java_lang_Class::is_primitive(sub_mirror) ||
488 java_lang_Class::is_primitive(super_mirror)) {
489 jboolean ret = (sub_mirror == super_mirror);
490
491 HOTSPOT_JNI_ISASSIGNABLEFROM_RETURN(ret);
492 return ret;
493 }
494 Klass* sub_klass = java_lang_Class::as_Klass(sub_mirror);
495 Klass* super_klass = java_lang_Class::as_Klass(super_mirror);
496 assert(sub_klass != nullptr && super_klass != nullptr, "invalid arguments to jni_IsAssignableFrom");
497 jboolean ret = sub_klass->is_subtype_of(super_klass) ?
498 JNI_TRUE : JNI_FALSE;
499
500 HOTSPOT_JNI_ISASSIGNABLEFROM_RETURN(ret);
501 return ret;
502 JNI_END
503
504
505 DT_RETURN_MARK_DECL(Throw, jint
506 , HOTSPOT_JNI_THROW_RETURN(_ret_ref));
507
508 JNI_ENTRY(jint, jni_Throw(JNIEnv *env, jthrowable obj))
509 HOTSPOT_JNI_THROW_ENTRY(env, obj);
510
511 jint ret = JNI_OK;
512 DT_RETURN_MARK(Throw, jint, (const jint&)ret);
513
514 THROW_OOP_(JNIHandles::resolve(obj), JNI_OK);
515 ShouldNotReachHere();
516 return 0; // Mute compiler.
517 JNI_END
518
519
520 DT_RETURN_MARK_DECL(ThrowNew, jint
521 , HOTSPOT_JNI_THROWNEW_RETURN(_ret_ref));
522
523 JNI_ENTRY(jint, jni_ThrowNew(JNIEnv *env, jclass clazz, const char *message))
524 HOTSPOT_JNI_THROWNEW_ENTRY(env, clazz, (char *) message);
525
526 jint ret = JNI_OK;
527 DT_RETURN_MARK(ThrowNew, jint, (const jint&)ret);
528
529 InstanceKlass* k = java_lang_Class::as_InstanceKlass(JNIHandles::resolve_non_null(clazz));
530 Symbol* name = k->name();
531 Handle class_loader (THREAD, k->class_loader());
532 THROW_MSG_LOADER_(name, (char *)message, class_loader, JNI_OK);
533 ShouldNotReachHere();
534 return 0; // Mute compiler.
535 JNI_END
536
537
538 // JNI functions only transform a pending async exception to a synchronous
539 // exception in ExceptionOccurred and ExceptionCheck calls, since
540 // delivering an async exception in other places won't change the native
541 // code's control flow and would be harmful when native code further calls
542 // JNI functions with a pending exception. Async exception is also checked
543 // during the call, so ExceptionOccurred/ExceptionCheck won't return
544 // false but deliver the async exception at the very end during
545 // state transition.
546
547 static void jni_check_async_exceptions(JavaThread *thread) {
548 assert(thread == Thread::current(), "must be itself");
549 if (thread->has_async_exception_condition()) {
550 SafepointMechanism::process_if_requested_with_exit_check(thread, true /* check asyncs */);
551 }
552 }
553
554 JNI_ENTRY_NO_PRESERVE(jthrowable, jni_ExceptionOccurred(JNIEnv *env))
555 HOTSPOT_JNI_EXCEPTIONOCCURRED_ENTRY(env);
556
557 jni_check_async_exceptions(thread);
558 oop exception = thread->pending_exception();
559 jthrowable ret = (jthrowable) JNIHandles::make_local(THREAD, exception);
560
561 HOTSPOT_JNI_EXCEPTIONOCCURRED_RETURN(ret);
562 return ret;
563 JNI_END
564
565
566 JNI_ENTRY_NO_PRESERVE(void, jni_ExceptionDescribe(JNIEnv *env))
567 HOTSPOT_JNI_EXCEPTIONDESCRIBE_ENTRY(env);
568
569 if (thread->has_pending_exception()) {
570 Handle ex(thread, thread->pending_exception());
571 thread->clear_pending_exception();
572 jio_fprintf(defaultStream::error_stream(), "Exception ");
573 if (thread != nullptr && thread->threadObj() != nullptr) {
574 ResourceMark rm(THREAD);
575 jio_fprintf(defaultStream::error_stream(),
576 "in thread \"%s\" ", thread->name());
577 }
578 if (ex->is_a(vmClasses::Throwable_klass())) {
579 JavaValue result(T_VOID);
580 JavaCalls::call_virtual(&result,
581 ex,
582 vmClasses::Throwable_klass(),
583 vmSymbols::printStackTrace_name(),
584 vmSymbols::void_method_signature(),
585 THREAD);
586 // If an exception is thrown in the call it gets thrown away. Not much
587 // we can do with it. The native code that calls this, does not check
588 // for the exception - hence, it might still be in the thread when DestroyVM gets
589 // called, potentially causing a few asserts to trigger - since no pending exception
590 // is expected.
591 CLEAR_PENDING_EXCEPTION;
592 } else {
593 ResourceMark rm(THREAD);
594 jio_fprintf(defaultStream::error_stream(),
595 ". Uncaught exception of type %s.",
596 ex->klass()->external_name());
597 }
598 }
599
600 HOTSPOT_JNI_EXCEPTIONDESCRIBE_RETURN();
601 JNI_END
602
603
604 JNI_ENTRY_NO_PRESERVE(void, jni_ExceptionClear(JNIEnv *env))
605 HOTSPOT_JNI_EXCEPTIONCLEAR_ENTRY(env);
606
607 // The jni code might be using this API to clear java thrown exception.
608 // So just mark jvmti thread exception state as exception caught.
609 JvmtiThreadState *state = JavaThread::current()->jvmti_thread_state();
610 if (state != nullptr && state->is_exception_detected()) {
611 state->set_exception_caught();
612 }
613 thread->clear_pending_exception();
614
615 HOTSPOT_JNI_EXCEPTIONCLEAR_RETURN();
616 JNI_END
617
618
619 JNI_ENTRY(void, jni_FatalError(JNIEnv *env, const char *msg))
620 HOTSPOT_JNI_FATALERROR_ENTRY(env, (char *) msg);
621
622 tty->print_cr("FATAL ERROR in native method: %s", msg);
623 thread->print_jni_stack();
624 os::abort(); // Dump core and abort
625 JNI_END
626
627
628 JNI_ENTRY(jint, jni_PushLocalFrame(JNIEnv *env, jint capacity))
629 HOTSPOT_JNI_PUSHLOCALFRAME_ENTRY(env, capacity);
630
631 //%note jni_11
632 if (capacity < 0 ||
633 ((MaxJNILocalCapacity > 0) && (capacity > MaxJNILocalCapacity))) {
634 HOTSPOT_JNI_PUSHLOCALFRAME_RETURN((uint32_t)JNI_ERR);
635 return JNI_ERR;
636 }
637
638 thread->push_jni_handle_block();
639 jint ret = JNI_OK;
640 HOTSPOT_JNI_PUSHLOCALFRAME_RETURN(ret);
641 return ret;
642 JNI_END
643
644
645 JNI_ENTRY(jobject, jni_PopLocalFrame(JNIEnv *env, jobject result))
646 HOTSPOT_JNI_POPLOCALFRAME_ENTRY(env, result);
647
648 //%note jni_11
649 Handle result_handle(thread, JNIHandles::resolve(result));
650 JNIHandleBlock* old_handles = thread->active_handles();
651 JNIHandleBlock* new_handles = old_handles->pop_frame_link();
652 if (new_handles != nullptr) {
653 // As a sanity check we only release the handle blocks if the pop_frame_link is not null.
654 // This way code will still work if PopLocalFrame is called without a corresponding
655 // PushLocalFrame call. Note that we set the pop_frame_link to null explicitly, otherwise
656 // the release_block call will release the blocks.
657 thread->set_active_handles(new_handles);
658 old_handles->set_pop_frame_link(nullptr); // clear link we won't release new_handles below
659 JNIHandleBlock::release_block(old_handles, thread); // may block
660 result = JNIHandles::make_local(thread, result_handle());
661 }
662 HOTSPOT_JNI_POPLOCALFRAME_RETURN(result);
663 return result;
664 JNI_END
665
666
667 JNI_ENTRY(jobject, jni_NewGlobalRef(JNIEnv *env, jobject ref))
668 HOTSPOT_JNI_NEWGLOBALREF_ENTRY(env, ref);
669
670 Handle ref_handle(thread, JNIHandles::resolve(ref));
671 jobject ret = JNIHandles::make_global(ref_handle, AllocFailStrategy::RETURN_NULL);
672
673 HOTSPOT_JNI_NEWGLOBALREF_RETURN(ret);
674 return ret;
675 JNI_END
676
677 // Must be JNI_ENTRY (with HandleMark)
678 JNI_ENTRY_NO_PRESERVE(void, jni_DeleteGlobalRef(JNIEnv *env, jobject ref))
679 HOTSPOT_JNI_DELETEGLOBALREF_ENTRY(env, ref);
680
681 JNIHandles::destroy_global(ref);
682
683 HOTSPOT_JNI_DELETEGLOBALREF_RETURN();
684 JNI_END
685
686 JNI_ENTRY_NO_PRESERVE(void, jni_DeleteLocalRef(JNIEnv *env, jobject obj))
687 HOTSPOT_JNI_DELETELOCALREF_ENTRY(env, obj);
688
689 JNIHandles::destroy_local(obj);
690
691 HOTSPOT_JNI_DELETELOCALREF_RETURN();
692 JNI_END
693
694 JNI_ENTRY_NO_PRESERVE(jboolean, jni_IsSameObject(JNIEnv *env, jobject r1, jobject r2))
695 HOTSPOT_JNI_ISSAMEOBJECT_ENTRY(env, r1, r2);
696
697 jboolean ret = JNIHandles::is_same_object(r1, r2) ? JNI_TRUE : JNI_FALSE;
698
699 HOTSPOT_JNI_ISSAMEOBJECT_RETURN(ret);
700 return ret;
701 JNI_END
702
703
704 JNI_ENTRY(jobject, jni_NewLocalRef(JNIEnv *env, jobject ref))
705 HOTSPOT_JNI_NEWLOCALREF_ENTRY(env, ref);
706
707 jobject ret = JNIHandles::make_local(THREAD, JNIHandles::resolve(ref),
708 AllocFailStrategy::RETURN_NULL);
709
710 HOTSPOT_JNI_NEWLOCALREF_RETURN(ret);
711 return ret;
712 JNI_END
713
714 JNI_LEAF(jint, jni_EnsureLocalCapacity(JNIEnv *env, jint capacity))
715 HOTSPOT_JNI_ENSURELOCALCAPACITY_ENTRY(env, capacity);
716
717 jint ret;
718 if (capacity >= 0 &&
719 ((MaxJNILocalCapacity <= 0) || (capacity <= MaxJNILocalCapacity))) {
720 ret = JNI_OK;
721 } else {
722 ret = JNI_ERR;
723 }
724
725 HOTSPOT_JNI_ENSURELOCALCAPACITY_RETURN(ret);
726 return ret;
727 JNI_END
728
729 // Return the Handle Type
730 JNI_LEAF(jobjectRefType, jni_GetObjectRefType(JNIEnv *env, jobject obj))
731 HOTSPOT_JNI_GETOBJECTREFTYPE_ENTRY(env, obj);
732
733 jobjectRefType ret = JNIInvalidRefType;
734 if (obj != nullptr) {
735 ret = JNIHandles::handle_type(thread, obj);
736 }
737
738 HOTSPOT_JNI_GETOBJECTREFTYPE_RETURN((void *) ret);
739 return ret;
740 JNI_END
741
742
743 class JNI_ArgumentPusher : public SignatureIterator {
744 protected:
745 JavaCallArguments* _arguments;
746
747 void push_int(jint x) { _arguments->push_int(x); }
748 void push_long(jlong x) { _arguments->push_long(x); }
749 void push_float(jfloat x) { _arguments->push_float(x); }
750 void push_double(jdouble x) { _arguments->push_double(x); }
751 void push_object(jobject x) { _arguments->push_jobject(x); }
752
753 void push_boolean(jboolean b) {
754 // Normalize boolean arguments from native code by converting 1-255 to JNI_TRUE and
755 // 0 to JNI_FALSE. Boolean return values from native are normalized the same in
756 // TemplateInterpreterGenerator::generate_result_handler_for and
757 // SharedRuntime::generate_native_wrapper.
758 push_int(b == 0 ? JNI_FALSE : JNI_TRUE);
759 }
760
761 JNI_ArgumentPusher(Method* method)
762 : SignatureIterator(method->signature(),
763 Fingerprinter(methodHandle(Thread::current(), method)).fingerprint())
764 {
765 _arguments = nullptr;
766 }
767
768 public:
769 virtual void push_arguments_on(JavaCallArguments* arguments) = 0;
770 };
771
772
773 class JNI_ArgumentPusherVaArg : public JNI_ArgumentPusher {
774 va_list _ap;
775
776 void set_ap(va_list rap) {
777 va_copy(_ap, rap);
778 }
779
780 friend class SignatureIterator; // so do_parameters_on can call do_type
781 void do_type(BasicType type) {
782 switch (type) {
783 // these are coerced to int when using va_arg
784 case T_BYTE:
785 case T_CHAR:
786 case T_SHORT:
787 case T_INT: push_int(va_arg(_ap, jint)); break;
788 case T_BOOLEAN: push_boolean((jboolean) va_arg(_ap, jint)); break;
789
790 // each of these paths is exercised by the various jck Call[Static,Nonvirtual,][Void,Int,..]Method[A,V,] tests
791
792 case T_LONG: push_long(va_arg(_ap, jlong)); break;
793 // float is coerced to double w/ va_arg
794 case T_FLOAT: push_float((jfloat) va_arg(_ap, jdouble)); break;
795 case T_DOUBLE: push_double(va_arg(_ap, jdouble)); break;
796
797 case T_ARRAY:
798 case T_OBJECT: push_object(va_arg(_ap, jobject)); break;
799 default: ShouldNotReachHere();
800 }
801 }
802
803 public:
804 JNI_ArgumentPusherVaArg(jmethodID method_id, va_list rap)
805 : JNI_ArgumentPusher(Method::resolve_jmethod_id(method_id)) {
806 set_ap(rap);
807 }
808
809 ~JNI_ArgumentPusherVaArg() {
810 va_end(_ap);
811 }
812
813 virtual void push_arguments_on(JavaCallArguments* arguments) {
814 _arguments = arguments;
815 do_parameters_on(this);
816 }
817 };
818
819
820 class JNI_ArgumentPusherArray : public JNI_ArgumentPusher {
821 protected:
822 const jvalue *_ap;
823
824 inline void set_ap(const jvalue *rap) { _ap = rap; }
825
826 friend class SignatureIterator; // so do_parameters_on can call do_type
827 void do_type(BasicType type) {
828 switch (type) {
829 case T_CHAR: push_int((_ap++)->c); break;
830 case T_SHORT: push_int((_ap++)->s); break;
831 case T_BYTE: push_int((_ap++)->b); break;
832 case T_INT: push_int((_ap++)->i); break;
833 case T_BOOLEAN: push_boolean((_ap++)->z); break;
834 case T_LONG: push_long((_ap++)->j); break;
835 case T_FLOAT: push_float((_ap++)->f); break;
836 case T_DOUBLE: push_double((_ap++)->d); break;
837 case T_ARRAY:
838 case T_OBJECT: push_object((_ap++)->l); break;
839 default: ShouldNotReachHere();
840 }
841 }
842
843 public:
844 JNI_ArgumentPusherArray(jmethodID method_id, const jvalue *rap)
845 : JNI_ArgumentPusher(Method::resolve_jmethod_id(method_id)) {
846 set_ap(rap);
847 }
848
849 virtual void push_arguments_on(JavaCallArguments* arguments) {
850 _arguments = arguments;
851 do_parameters_on(this);
852 }
853 };
854
855
856 enum JNICallType {
857 JNI_STATIC,
858 JNI_VIRTUAL,
859 JNI_NONVIRTUAL
860 };
861
862
863
864 static void jni_invoke_static(JNIEnv *env, JavaValue* result, jobject receiver, JNICallType call_type, jmethodID method_id, JNI_ArgumentPusher *args, TRAPS) {
865 methodHandle method(THREAD, Method::resolve_jmethod_id(method_id));
866
867 // Create object to hold arguments for the JavaCall, and associate it with
868 // the jni parser
869 ResourceMark rm(THREAD);
870 JavaCallArguments java_args(method->size_of_parameters());
871
872 assert(method->is_static(), "method should be static");
873
874 // Fill out JavaCallArguments object
875 args->push_arguments_on(&java_args);
876 // Initialize result type
877 result->set_type(args->return_type());
878
879 // Invoke the method. Result is returned as oop.
880 JavaCalls::call(result, method, &java_args, CHECK);
881
882 // Convert result
883 if (is_reference_type(result->get_type())) {
884 result->set_jobject(JNIHandles::make_local(THREAD, result->get_oop()));
885 }
886 }
887
888
889 static void jni_invoke_nonstatic(JNIEnv *env, JavaValue* result, jobject receiver, JNICallType call_type, jmethodID method_id, JNI_ArgumentPusher *args, TRAPS) {
890 oop recv = JNIHandles::resolve(receiver);
891 if (recv == nullptr) {
892 THROW(vmSymbols::java_lang_NullPointerException());
893 }
894 Handle h_recv(THREAD, recv);
895
896 int number_of_parameters;
897 Method* selected_method;
898 {
899 Method* m = Method::resolve_jmethod_id(method_id);
900 number_of_parameters = m->size_of_parameters();
901 InstanceKlass* holder = m->method_holder();
902 if (call_type != JNI_VIRTUAL) {
903 selected_method = m;
904 } else if (!m->has_itable_index()) {
905 // non-interface call -- for that little speed boost, don't handlize
906 DEBUG_ONLY(NoSafepointVerifier nosafepoint;)
907 // jni_GetMethodID makes sure class is linked and initialized
908 // so m should have a valid vtable index.
909 assert(m->valid_vtable_index(), "no valid vtable index");
910 int vtbl_index = m->vtable_index();
911 if (vtbl_index != Method::nonvirtual_vtable_index) {
912 selected_method = h_recv->klass()->method_at_vtable(vtbl_index);
913 } else {
914 // final method
915 selected_method = m;
916 }
917 } else {
918 // interface call
919 int itbl_index = m->itable_index();
920 Klass* k = h_recv->klass();
921 selected_method = InstanceKlass::cast(k)->method_at_itable(holder, itbl_index, CHECK);
922 }
923 }
924
925 if (selected_method->is_abstract()) {
926 ResourceMark rm(THREAD);
927 THROW_MSG(vmSymbols::java_lang_AbstractMethodError(), selected_method->name()->as_C_string());
928 }
929
930 methodHandle method(THREAD, selected_method);
931
932 // Create object to hold arguments for the JavaCall, and associate it with
933 // the jni parser
934 ResourceMark rm(THREAD);
935 JavaCallArguments java_args(number_of_parameters);
936
937 // handle arguments
938 assert(!method->is_static(), "method %s should not be static", method->name_and_sig_as_C_string());
939 java_args.push_oop(h_recv); // Push jobject handle
940
941 // Fill out JavaCallArguments object
942 args->push_arguments_on(&java_args);
943 // Initialize result type
944 result->set_type(args->return_type());
945
946 // Invoke the method. Result is returned as oop.
947 JavaCalls::call(result, method, &java_args, CHECK);
948
949 // Convert result
950 if (is_reference_type(result->get_type())) {
951 result->set_jobject(JNIHandles::make_local(THREAD, result->get_oop()));
952 }
953 }
954
955 DT_RETURN_MARK_DECL(AllocObject, jobject
956 , HOTSPOT_JNI_ALLOCOBJECT_RETURN(_ret_ref));
957
958 JNI_ENTRY(jobject, jni_AllocObject(JNIEnv *env, jclass clazz))
959 HOTSPOT_JNI_ALLOCOBJECT_ENTRY(env, clazz);
960
961 jobject ret = nullptr;
962 DT_RETURN_MARK(AllocObject, jobject, (const jobject&)ret);
963
964 instanceOop i = InstanceKlass::allocate_instance(JNIHandles::resolve_non_null(clazz), CHECK_NULL);
965 ret = JNIHandles::make_local(THREAD, i);
966 return ret;
967 JNI_END
968
969 DT_RETURN_MARK_DECL(NewObjectA, jobject
970 , HOTSPOT_JNI_NEWOBJECTA_RETURN(_ret_ref));
971
972 JNI_ENTRY(jobject, jni_NewObjectA(JNIEnv *env, jclass clazz, jmethodID methodID, const jvalue *args))
973 HOTSPOT_JNI_NEWOBJECTA_ENTRY(env, clazz, (uintptr_t) methodID);
974
975 jobject obj = nullptr;
976 DT_RETURN_MARK(NewObjectA, jobject, (const jobject&)obj);
977
978 instanceOop i = InstanceKlass::allocate_instance(JNIHandles::resolve_non_null(clazz), CHECK_NULL);
979 obj = JNIHandles::make_local(THREAD, i);
980 JavaValue jvalue(T_VOID);
981 JNI_ArgumentPusherArray ap(methodID, args);
982 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_NULL);
983 return obj;
984 JNI_END
985
986
987 DT_RETURN_MARK_DECL(NewObjectV, jobject
988 , HOTSPOT_JNI_NEWOBJECTV_RETURN(_ret_ref));
989
990 JNI_ENTRY(jobject, jni_NewObjectV(JNIEnv *env, jclass clazz, jmethodID methodID, va_list args))
991 HOTSPOT_JNI_NEWOBJECTV_ENTRY(env, clazz, (uintptr_t) methodID);
992
993 jobject obj = nullptr;
994 DT_RETURN_MARK(NewObjectV, jobject, (const jobject&)obj);
995
996 instanceOop i = InstanceKlass::allocate_instance(JNIHandles::resolve_non_null(clazz), CHECK_NULL);
997 obj = JNIHandles::make_local(THREAD, i);
998 JavaValue jvalue(T_VOID);
999 JNI_ArgumentPusherVaArg ap(methodID, args);
1000 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_NULL);
1001 return obj;
1002 JNI_END
1003
1004
1005 DT_RETURN_MARK_DECL(NewObject, jobject
1006 , HOTSPOT_JNI_NEWOBJECT_RETURN(_ret_ref));
1007
1008 JNI_ENTRY(jobject, jni_NewObject(JNIEnv *env, jclass clazz, jmethodID methodID, ...))
1009 HOTSPOT_JNI_NEWOBJECT_ENTRY(env, clazz, (uintptr_t) methodID);
1010
1011 jobject obj = nullptr;
1012 DT_RETURN_MARK(NewObject, jobject, (const jobject&)obj);
1013
1014 instanceOop i = InstanceKlass::allocate_instance(JNIHandles::resolve_non_null(clazz), CHECK_NULL);
1015 obj = JNIHandles::make_local(THREAD, i);
1016 va_list args;
1017 va_start(args, methodID);
1018 JavaValue jvalue(T_VOID);
1019 JNI_ArgumentPusherVaArg ap(methodID, args);
1020 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_NULL);
1021 va_end(args);
1022 return obj;
1023 JNI_END
1024
1025
1026 JNI_ENTRY(jclass, jni_GetObjectClass(JNIEnv *env, jobject obj))
1027 HOTSPOT_JNI_GETOBJECTCLASS_ENTRY(env, obj);
1028
1029 Klass* k = JNIHandles::resolve_non_null(obj)->klass();
1030 jclass ret =
1031 (jclass) JNIHandles::make_local(THREAD, k->java_mirror());
1032
1033 HOTSPOT_JNI_GETOBJECTCLASS_RETURN(ret);
1034 return ret;
1035 JNI_END
1036
1037 JNI_ENTRY_NO_PRESERVE(jboolean, jni_IsInstanceOf(JNIEnv *env, jobject obj, jclass clazz))
1038 HOTSPOT_JNI_ISINSTANCEOF_ENTRY(env, obj, clazz);
1039
1040 jboolean ret = JNI_TRUE;
1041 if (obj != nullptr) {
1042 ret = JNI_FALSE;
1043 Klass* k = java_lang_Class::as_Klass(
1044 JNIHandles::resolve_non_null(clazz));
1045 if (k != nullptr) {
1046 ret = JNIHandles::resolve_non_null(obj)->is_a(k) ? JNI_TRUE : JNI_FALSE;
1047 }
1048 }
1049
1050 HOTSPOT_JNI_ISINSTANCEOF_RETURN(ret);
1051 return ret;
1052 JNI_END
1053
1054
1055 static jmethodID get_method_id(JNIEnv *env, jclass clazz, const char *name_str,
1056 const char *sig, bool is_static, TRAPS) {
1057 // %%%% This code should probably just call into a method in the LinkResolver
1058 //
1059 // The class should have been loaded (we have an instance of the class
1060 // passed in) so the method and signature should already be in the symbol
1061 // table. If they're not there, the method doesn't exist.
1062 const char *name_to_probe = (name_str == nullptr)
1063 ? vmSymbols::object_initializer_name()->as_C_string()
1064 : name_str;
1065 TempNewSymbol name = SymbolTable::probe(name_to_probe, (int)strlen(name_to_probe));
1066 TempNewSymbol signature = SymbolTable::probe(sig, (int)strlen(sig));
1067
1068 if (name == nullptr || signature == nullptr) {
1069 THROW_MSG_NULL(vmSymbols::java_lang_NoSuchMethodError(), name_str);
1070 }
1071
1072 oop mirror = JNIHandles::resolve_non_null(clazz);
1073 Klass* klass = java_lang_Class::as_Klass(mirror);
1074
1075 // Throw a NoSuchMethodError exception if we have an instance of a
1076 // primitive java.lang.Class
1077 if (java_lang_Class::is_primitive(mirror)) {
1078 ResourceMark rm(THREAD);
1079 THROW_MSG_NULL(vmSymbols::java_lang_NoSuchMethodError(), err_msg("%s%s.%s%s", is_static ? "static " : "", klass->signature_name(), name_str, sig));
1080 }
1081
1082 // Make sure class is linked and initialized before handing id's out to
1083 // Method*s.
1084 klass->initialize(CHECK_NULL);
1085
1086 Method* m;
1087 if (name == vmSymbols::object_initializer_name() ||
1088 name == vmSymbols::class_initializer_name()) {
1089 // Never search superclasses for constructors
1090 if (klass->is_instance_klass()) {
1091 m = InstanceKlass::cast(klass)->find_method(name, signature);
1092 } else {
1093 m = nullptr;
1094 }
1095 } else {
1096 m = klass->lookup_method(name, signature);
1097 if (m == nullptr && klass->is_instance_klass()) {
1098 m = InstanceKlass::cast(klass)->lookup_method_in_ordered_interfaces(name, signature);
1099 }
1100 }
1101 if (m == nullptr || (m->is_static() != is_static)) {
1102 ResourceMark rm(THREAD);
1103 THROW_MSG_NULL(vmSymbols::java_lang_NoSuchMethodError(), err_msg("%s%s.%s%s", is_static ? "static " : "", klass->signature_name(), name_str, sig));
1104 }
1105 return m->jmethod_id();
1106 }
1107
1108
1109 JNI_ENTRY(jmethodID, jni_GetMethodID(JNIEnv *env, jclass clazz,
1110 const char *name, const char *sig))
1111 HOTSPOT_JNI_GETMETHODID_ENTRY(env, clazz, (char *) name, (char *) sig);
1112 jmethodID ret = get_method_id(env, clazz, name, sig, false, thread);
1113 HOTSPOT_JNI_GETMETHODID_RETURN((uintptr_t) ret);
1114 return ret;
1115 JNI_END
1116
1117
1118 JNI_ENTRY(jmethodID, jni_GetStaticMethodID(JNIEnv *env, jclass clazz,
1119 const char *name, const char *sig))
1120 HOTSPOT_JNI_GETSTATICMETHODID_ENTRY(env, (char *) clazz, (char *) name, (char *)sig);
1121 jmethodID ret = get_method_id(env, clazz, name, sig, true, thread);
1122 HOTSPOT_JNI_GETSTATICMETHODID_RETURN((uintptr_t) ret);
1123 return ret;
1124 JNI_END
1125
1126
1127
1128 //
1129 // Calling Methods
1130 //
1131
1132
1133 #define DEFINE_CALLMETHOD(ResultType, Result, Tag \
1134 , EntryProbe, ReturnProbe) \
1135 \
1136 DT_RETURN_MARK_DECL_FOR(Result, Call##Result##Method, ResultType \
1137 , ReturnProbe); \
1138 \
1139 JNI_ENTRY(ResultType, \
1140 jni_Call##Result##Method(JNIEnv *env, jobject obj, jmethodID methodID, ...)) \
1141 \
1142 EntryProbe; \
1143 ResultType ret{}; \
1144 DT_RETURN_MARK_FOR(Result, Call##Result##Method, ResultType, \
1145 (const ResultType&)ret);\
1146 \
1147 va_list args; \
1148 va_start(args, methodID); \
1149 JavaValue jvalue(Tag); \
1150 JNI_ArgumentPusherVaArg ap(methodID, args); \
1151 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK_(ResultType{})); \
1152 va_end(args); \
1153 ret = jvalue.get_##ResultType(); \
1154 return ret;\
1155 JNI_END
1156
1157 // the runtime type of subword integral basic types is integer
1158 DEFINE_CALLMETHOD(jboolean, Boolean, T_BOOLEAN
1159 , HOTSPOT_JNI_CALLBOOLEANMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1160 HOTSPOT_JNI_CALLBOOLEANMETHOD_RETURN(_ret_ref))
1161 DEFINE_CALLMETHOD(jbyte, Byte, T_BYTE
1162 , HOTSPOT_JNI_CALLBYTEMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1163 HOTSPOT_JNI_CALLBYTEMETHOD_RETURN(_ret_ref))
1164 DEFINE_CALLMETHOD(jchar, Char, T_CHAR
1165 , HOTSPOT_JNI_CALLCHARMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1166 HOTSPOT_JNI_CALLCHARMETHOD_RETURN(_ret_ref))
1167 DEFINE_CALLMETHOD(jshort, Short, T_SHORT
1168 , HOTSPOT_JNI_CALLSHORTMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1169 HOTSPOT_JNI_CALLSHORTMETHOD_RETURN(_ret_ref))
1170
1171 DEFINE_CALLMETHOD(jobject, Object, T_OBJECT
1172 , HOTSPOT_JNI_CALLOBJECTMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1173 HOTSPOT_JNI_CALLOBJECTMETHOD_RETURN(_ret_ref))
1174 DEFINE_CALLMETHOD(jint, Int, T_INT,
1175 HOTSPOT_JNI_CALLINTMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1176 HOTSPOT_JNI_CALLINTMETHOD_RETURN(_ret_ref))
1177 DEFINE_CALLMETHOD(jlong, Long, T_LONG
1178 , HOTSPOT_JNI_CALLLONGMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1179 HOTSPOT_JNI_CALLLONGMETHOD_RETURN(_ret_ref))
1180 // Float and double probes don't return value because dtrace doesn't currently support it
1181 DEFINE_CALLMETHOD(jfloat, Float, T_FLOAT
1182 , HOTSPOT_JNI_CALLFLOATMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1183 HOTSPOT_JNI_CALLFLOATMETHOD_RETURN())
1184 DEFINE_CALLMETHOD(jdouble, Double, T_DOUBLE
1185 , HOTSPOT_JNI_CALLDOUBLEMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1186 HOTSPOT_JNI_CALLDOUBLEMETHOD_RETURN())
1187
1188 #define DEFINE_CALLMETHODV(ResultType, Result, Tag \
1189 , EntryProbe, ReturnProbe) \
1190 \
1191 DT_RETURN_MARK_DECL_FOR(Result, Call##Result##MethodV, ResultType \
1192 , ReturnProbe); \
1193 \
1194 JNI_ENTRY(ResultType, \
1195 jni_Call##Result##MethodV(JNIEnv *env, jobject obj, jmethodID methodID, va_list args)) \
1196 \
1197 EntryProbe;\
1198 ResultType ret{}; \
1199 DT_RETURN_MARK_FOR(Result, Call##Result##MethodV, ResultType, \
1200 (const ResultType&)ret);\
1201 \
1202 JavaValue jvalue(Tag); \
1203 JNI_ArgumentPusherVaArg ap(methodID, args); \
1204 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK_(ResultType{})); \
1205 ret = jvalue.get_##ResultType(); \
1206 return ret;\
1207 JNI_END
1208
1209 // the runtime type of subword integral basic types is integer
1210 DEFINE_CALLMETHODV(jboolean, Boolean, T_BOOLEAN
1211 , HOTSPOT_JNI_CALLBOOLEANMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1212 HOTSPOT_JNI_CALLBOOLEANMETHODV_RETURN(_ret_ref))
1213 DEFINE_CALLMETHODV(jbyte, Byte, T_BYTE
1214 , HOTSPOT_JNI_CALLBYTEMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1215 HOTSPOT_JNI_CALLBYTEMETHODV_RETURN(_ret_ref))
1216 DEFINE_CALLMETHODV(jchar, Char, T_CHAR
1217 , HOTSPOT_JNI_CALLCHARMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1218 HOTSPOT_JNI_CALLCHARMETHODV_RETURN(_ret_ref))
1219 DEFINE_CALLMETHODV(jshort, Short, T_SHORT
1220 , HOTSPOT_JNI_CALLSHORTMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1221 HOTSPOT_JNI_CALLSHORTMETHODV_RETURN(_ret_ref))
1222
1223 DEFINE_CALLMETHODV(jobject, Object, T_OBJECT
1224 , HOTSPOT_JNI_CALLOBJECTMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1225 HOTSPOT_JNI_CALLOBJECTMETHODV_RETURN(_ret_ref))
1226 DEFINE_CALLMETHODV(jint, Int, T_INT,
1227 HOTSPOT_JNI_CALLINTMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1228 HOTSPOT_JNI_CALLINTMETHODV_RETURN(_ret_ref))
1229 DEFINE_CALLMETHODV(jlong, Long, T_LONG
1230 , HOTSPOT_JNI_CALLLONGMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1231 HOTSPOT_JNI_CALLLONGMETHODV_RETURN(_ret_ref))
1232 // Float and double probes don't return value because dtrace doesn't currently support it
1233 DEFINE_CALLMETHODV(jfloat, Float, T_FLOAT
1234 , HOTSPOT_JNI_CALLFLOATMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1235 HOTSPOT_JNI_CALLFLOATMETHODV_RETURN())
1236 DEFINE_CALLMETHODV(jdouble, Double, T_DOUBLE
1237 , HOTSPOT_JNI_CALLDOUBLEMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1238 HOTSPOT_JNI_CALLDOUBLEMETHODV_RETURN())
1239
1240 #define DEFINE_CALLMETHODA(ResultType, Result, Tag \
1241 , EntryProbe, ReturnProbe) \
1242 \
1243 DT_RETURN_MARK_DECL_FOR(Result, Call##Result##MethodA, ResultType \
1244 , ReturnProbe); \
1245 \
1246 JNI_ENTRY(ResultType, \
1247 jni_Call##Result##MethodA(JNIEnv *env, jobject obj, jmethodID methodID, const jvalue *args)) \
1248 EntryProbe; \
1249 ResultType ret{}; \
1250 DT_RETURN_MARK_FOR(Result, Call##Result##MethodA, ResultType, \
1251 (const ResultType&)ret);\
1252 \
1253 JavaValue jvalue(Tag); \
1254 JNI_ArgumentPusherArray ap(methodID, args); \
1255 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK_(ResultType{})); \
1256 ret = jvalue.get_##ResultType(); \
1257 return ret;\
1258 JNI_END
1259
1260 // the runtime type of subword integral basic types is integer
1261 DEFINE_CALLMETHODA(jboolean, Boolean, T_BOOLEAN
1262 , HOTSPOT_JNI_CALLBOOLEANMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1263 HOTSPOT_JNI_CALLBOOLEANMETHODA_RETURN(_ret_ref))
1264 DEFINE_CALLMETHODA(jbyte, Byte, T_BYTE
1265 , HOTSPOT_JNI_CALLBYTEMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1266 HOTSPOT_JNI_CALLBYTEMETHODA_RETURN(_ret_ref))
1267 DEFINE_CALLMETHODA(jchar, Char, T_CHAR
1268 , HOTSPOT_JNI_CALLCHARMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1269 HOTSPOT_JNI_CALLCHARMETHODA_RETURN(_ret_ref))
1270 DEFINE_CALLMETHODA(jshort, Short, T_SHORT
1271 , HOTSPOT_JNI_CALLSHORTMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1272 HOTSPOT_JNI_CALLSHORTMETHODA_RETURN(_ret_ref))
1273
1274 DEFINE_CALLMETHODA(jobject, Object, T_OBJECT
1275 , HOTSPOT_JNI_CALLOBJECTMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1276 HOTSPOT_JNI_CALLOBJECTMETHODA_RETURN(_ret_ref))
1277 DEFINE_CALLMETHODA(jint, Int, T_INT,
1278 HOTSPOT_JNI_CALLINTMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1279 HOTSPOT_JNI_CALLINTMETHODA_RETURN(_ret_ref))
1280 DEFINE_CALLMETHODA(jlong, Long, T_LONG
1281 , HOTSPOT_JNI_CALLLONGMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1282 HOTSPOT_JNI_CALLLONGMETHODA_RETURN(_ret_ref))
1283 // Float and double probes don't return value because dtrace doesn't currently support it
1284 DEFINE_CALLMETHODA(jfloat, Float, T_FLOAT
1285 , HOTSPOT_JNI_CALLFLOATMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1286 HOTSPOT_JNI_CALLFLOATMETHODA_RETURN())
1287 DEFINE_CALLMETHODA(jdouble, Double, T_DOUBLE
1288 , HOTSPOT_JNI_CALLDOUBLEMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1289 HOTSPOT_JNI_CALLDOUBLEMETHODA_RETURN())
1290
1291 DT_VOID_RETURN_MARK_DECL(CallVoidMethod, HOTSPOT_JNI_CALLVOIDMETHOD_RETURN());
1292 DT_VOID_RETURN_MARK_DECL(CallVoidMethodV, HOTSPOT_JNI_CALLVOIDMETHODV_RETURN());
1293 DT_VOID_RETURN_MARK_DECL(CallVoidMethodA, HOTSPOT_JNI_CALLVOIDMETHODA_RETURN());
1294
1295
1296 JNI_ENTRY(void, jni_CallVoidMethod(JNIEnv *env, jobject obj, jmethodID methodID, ...))
1297 HOTSPOT_JNI_CALLVOIDMETHOD_ENTRY(env, obj, (uintptr_t) methodID);
1298 DT_VOID_RETURN_MARK(CallVoidMethod);
1299
1300 va_list args;
1301 va_start(args, methodID);
1302 JavaValue jvalue(T_VOID);
1303 JNI_ArgumentPusherVaArg ap(methodID, args);
1304 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK);
1305 va_end(args);
1306 JNI_END
1307
1308
1309 JNI_ENTRY(void, jni_CallVoidMethodV(JNIEnv *env, jobject obj, jmethodID methodID, va_list args))
1310 HOTSPOT_JNI_CALLVOIDMETHODV_ENTRY(env, obj, (uintptr_t) methodID);
1311 DT_VOID_RETURN_MARK(CallVoidMethodV);
1312
1313 JavaValue jvalue(T_VOID);
1314 JNI_ArgumentPusherVaArg ap(methodID, args);
1315 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK);
1316 JNI_END
1317
1318
1319 JNI_ENTRY(void, jni_CallVoidMethodA(JNIEnv *env, jobject obj, jmethodID methodID, const jvalue *args))
1320 HOTSPOT_JNI_CALLVOIDMETHODA_ENTRY(env, obj, (uintptr_t) methodID);
1321 DT_VOID_RETURN_MARK(CallVoidMethodA);
1322
1323 JavaValue jvalue(T_VOID);
1324 JNI_ArgumentPusherArray ap(methodID, args);
1325 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK);
1326 JNI_END
1327
1328
1329
1330 #define DEFINE_CALLNONVIRTUALMETHOD(ResultType, Result, Tag \
1331 , EntryProbe, ReturnProbe) \
1332 \
1333 DT_RETURN_MARK_DECL_FOR(Result, CallNonvirtual##Result##Method, ResultType \
1334 , ReturnProbe);\
1335 \
1336 JNI_ENTRY(ResultType, \
1337 jni_CallNonvirtual##Result##Method(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, ...)) \
1338 \
1339 EntryProbe;\
1340 ResultType ret;\
1341 DT_RETURN_MARK_FOR(Result, CallNonvirtual##Result##Method, ResultType, \
1342 (const ResultType&)ret);\
1343 \
1344 va_list args; \
1345 va_start(args, methodID); \
1346 JavaValue jvalue(Tag); \
1347 JNI_ArgumentPusherVaArg ap(methodID, args); \
1348 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_(ResultType{})); \
1349 va_end(args); \
1350 ret = jvalue.get_##ResultType(); \
1351 return ret;\
1352 JNI_END
1353
1354 // the runtime type of subword integral basic types is integer
1355 DEFINE_CALLNONVIRTUALMETHOD(jboolean, Boolean, T_BOOLEAN
1356 , HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1357 HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHOD_RETURN(_ret_ref))
1358 DEFINE_CALLNONVIRTUALMETHOD(jbyte, Byte, T_BYTE
1359 , HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1360 HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHOD_RETURN(_ret_ref))
1361 DEFINE_CALLNONVIRTUALMETHOD(jchar, Char, T_CHAR
1362 , HOTSPOT_JNI_CALLNONVIRTUALCHARMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1363 HOTSPOT_JNI_CALLNONVIRTUALCHARMETHOD_RETURN(_ret_ref))
1364 DEFINE_CALLNONVIRTUALMETHOD(jshort, Short, T_SHORT
1365 , HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1366 HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHOD_RETURN(_ret_ref))
1367
1368 DEFINE_CALLNONVIRTUALMETHOD(jobject, Object, T_OBJECT
1369 , HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1370 HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHOD_RETURN(_ret_ref))
1371 DEFINE_CALLNONVIRTUALMETHOD(jint, Int, T_INT
1372 , HOTSPOT_JNI_CALLNONVIRTUALINTMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1373 HOTSPOT_JNI_CALLNONVIRTUALINTMETHOD_RETURN(_ret_ref))
1374 DEFINE_CALLNONVIRTUALMETHOD(jlong, Long, T_LONG
1375 , HOTSPOT_JNI_CALLNONVIRTUALLONGMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1376 // Float and double probes don't return value because dtrace doesn't currently support it
1377 HOTSPOT_JNI_CALLNONVIRTUALLONGMETHOD_RETURN(_ret_ref))
1378 DEFINE_CALLNONVIRTUALMETHOD(jfloat, Float, T_FLOAT
1379 , HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1380 HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHOD_RETURN())
1381 DEFINE_CALLNONVIRTUALMETHOD(jdouble, Double, T_DOUBLE
1382 , HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1383 HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHOD_RETURN())
1384
1385 #define DEFINE_CALLNONVIRTUALMETHODV(ResultType, Result, Tag \
1386 , EntryProbe, ReturnProbe) \
1387 \
1388 DT_RETURN_MARK_DECL_FOR(Result, CallNonvirtual##Result##MethodV, ResultType \
1389 , ReturnProbe);\
1390 \
1391 JNI_ENTRY(ResultType, \
1392 jni_CallNonvirtual##Result##MethodV(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, va_list args)) \
1393 \
1394 EntryProbe;\
1395 ResultType ret;\
1396 DT_RETURN_MARK_FOR(Result, CallNonvirtual##Result##MethodV, ResultType, \
1397 (const ResultType&)ret);\
1398 \
1399 JavaValue jvalue(Tag); \
1400 JNI_ArgumentPusherVaArg ap(methodID, args); \
1401 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_(ResultType{})); \
1402 ret = jvalue.get_##ResultType(); \
1403 return ret;\
1404 JNI_END
1405
1406 // the runtime type of subword integral basic types is integer
1407 DEFINE_CALLNONVIRTUALMETHODV(jboolean, Boolean, T_BOOLEAN
1408 , HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1409 HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHODV_RETURN(_ret_ref))
1410 DEFINE_CALLNONVIRTUALMETHODV(jbyte, Byte, T_BYTE
1411 , HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1412 HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHODV_RETURN(_ret_ref))
1413 DEFINE_CALLNONVIRTUALMETHODV(jchar, Char, T_CHAR
1414 , HOTSPOT_JNI_CALLNONVIRTUALCHARMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1415 HOTSPOT_JNI_CALLNONVIRTUALCHARMETHODV_RETURN(_ret_ref))
1416 DEFINE_CALLNONVIRTUALMETHODV(jshort, Short, T_SHORT
1417 , HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1418 HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHODV_RETURN(_ret_ref))
1419
1420 DEFINE_CALLNONVIRTUALMETHODV(jobject, Object, T_OBJECT
1421 , HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1422 HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHODV_RETURN(_ret_ref))
1423 DEFINE_CALLNONVIRTUALMETHODV(jint, Int, T_INT
1424 , HOTSPOT_JNI_CALLNONVIRTUALINTMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1425 HOTSPOT_JNI_CALLNONVIRTUALINTMETHODV_RETURN(_ret_ref))
1426 DEFINE_CALLNONVIRTUALMETHODV(jlong, Long, T_LONG
1427 , HOTSPOT_JNI_CALLNONVIRTUALLONGMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1428 // Float and double probes don't return value because dtrace doesn't currently support it
1429 HOTSPOT_JNI_CALLNONVIRTUALLONGMETHODV_RETURN(_ret_ref))
1430 DEFINE_CALLNONVIRTUALMETHODV(jfloat, Float, T_FLOAT
1431 , HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1432 HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHODV_RETURN())
1433 DEFINE_CALLNONVIRTUALMETHODV(jdouble, Double, T_DOUBLE
1434 , HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1435 HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHODV_RETURN())
1436
1437 #define DEFINE_CALLNONVIRTUALMETHODA(ResultType, Result, Tag \
1438 , EntryProbe, ReturnProbe) \
1439 \
1440 DT_RETURN_MARK_DECL_FOR(Result, CallNonvirtual##Result##MethodA, ResultType \
1441 , ReturnProbe);\
1442 \
1443 JNI_ENTRY(ResultType, \
1444 jni_CallNonvirtual##Result##MethodA(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, const jvalue *args)) \
1445 \
1446 EntryProbe;\
1447 ResultType ret;\
1448 DT_RETURN_MARK_FOR(Result, CallNonvirtual##Result##MethodA, ResultType, \
1449 (const ResultType&)ret);\
1450 \
1451 JavaValue jvalue(Tag); \
1452 JNI_ArgumentPusherArray ap(methodID, args); \
1453 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_(ResultType{})); \
1454 ret = jvalue.get_##ResultType(); \
1455 return ret;\
1456 JNI_END
1457
1458 // the runtime type of subword integral basic types is integer
1459 DEFINE_CALLNONVIRTUALMETHODA(jboolean, Boolean, T_BOOLEAN
1460 , HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1461 HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHODA_RETURN(_ret_ref))
1462 DEFINE_CALLNONVIRTUALMETHODA(jbyte, Byte, T_BYTE
1463 , HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1464 HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHODA_RETURN(_ret_ref))
1465 DEFINE_CALLNONVIRTUALMETHODA(jchar, Char, T_CHAR
1466 , HOTSPOT_JNI_CALLNONVIRTUALCHARMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1467 HOTSPOT_JNI_CALLNONVIRTUALCHARMETHODA_RETURN(_ret_ref))
1468 DEFINE_CALLNONVIRTUALMETHODA(jshort, Short, T_SHORT
1469 , HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1470 HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHODA_RETURN(_ret_ref))
1471
1472 DEFINE_CALLNONVIRTUALMETHODA(jobject, Object, T_OBJECT
1473 , HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1474 HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHODA_RETURN(_ret_ref))
1475 DEFINE_CALLNONVIRTUALMETHODA(jint, Int, T_INT
1476 , HOTSPOT_JNI_CALLNONVIRTUALINTMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1477 HOTSPOT_JNI_CALLNONVIRTUALINTMETHODA_RETURN(_ret_ref))
1478 DEFINE_CALLNONVIRTUALMETHODA(jlong, Long, T_LONG
1479 , HOTSPOT_JNI_CALLNONVIRTUALLONGMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1480 // Float and double probes don't return value because dtrace doesn't currently support it
1481 HOTSPOT_JNI_CALLNONVIRTUALLONGMETHODA_RETURN(_ret_ref))
1482 DEFINE_CALLNONVIRTUALMETHODA(jfloat, Float, T_FLOAT
1483 , HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1484 HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHODA_RETURN())
1485 DEFINE_CALLNONVIRTUALMETHODA(jdouble, Double, T_DOUBLE
1486 , HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1487 HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHODA_RETURN())
1488
1489 DT_VOID_RETURN_MARK_DECL(CallNonvirtualVoidMethod
1490 , HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHOD_RETURN());
1491 DT_VOID_RETURN_MARK_DECL(CallNonvirtualVoidMethodV
1492 , HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHODV_RETURN());
1493 DT_VOID_RETURN_MARK_DECL(CallNonvirtualVoidMethodA
1494 , HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHODA_RETURN());
1495
1496 JNI_ENTRY(void, jni_CallNonvirtualVoidMethod(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, ...))
1497 HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHOD_ENTRY(env, obj, cls, (uintptr_t) methodID);
1498 DT_VOID_RETURN_MARK(CallNonvirtualVoidMethod);
1499
1500 va_list args;
1501 va_start(args, methodID);
1502 JavaValue jvalue(T_VOID);
1503 JNI_ArgumentPusherVaArg ap(methodID, args);
1504 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK);
1505 va_end(args);
1506 JNI_END
1507
1508
1509 JNI_ENTRY(void, jni_CallNonvirtualVoidMethodV(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, va_list args))
1510 HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHODV_ENTRY(
1511 env, obj, cls, (uintptr_t) methodID);
1512 DT_VOID_RETURN_MARK(CallNonvirtualVoidMethodV);
1513
1514 JavaValue jvalue(T_VOID);
1515 JNI_ArgumentPusherVaArg ap(methodID, args);
1516 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK);
1517 JNI_END
1518
1519
1520 JNI_ENTRY(void, jni_CallNonvirtualVoidMethodA(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, const jvalue *args))
1521 HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHODA_ENTRY(
1522 env, obj, cls, (uintptr_t) methodID);
1523 DT_VOID_RETURN_MARK(CallNonvirtualVoidMethodA);
1524 JavaValue jvalue(T_VOID);
1525 JNI_ArgumentPusherArray ap(methodID, args);
1526 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK);
1527 JNI_END
1528
1529
1530
1531 #define DEFINE_CALLSTATICMETHOD(ResultType, Result, Tag \
1532 , EntryProbe, ResultProbe) \
1533 \
1534 DT_RETURN_MARK_DECL_FOR(Result, CallStatic##Result##Method, ResultType \
1535 , ResultProbe); \
1536 \
1537 JNI_ENTRY(ResultType, \
1538 jni_CallStatic##Result##Method(JNIEnv *env, jclass cls, jmethodID methodID, ...)) \
1539 \
1540 EntryProbe; \
1541 ResultType ret{}; \
1542 DT_RETURN_MARK_FOR(Result, CallStatic##Result##Method, ResultType, \
1543 (const ResultType&)ret);\
1544 \
1545 va_list args; \
1546 va_start(args, methodID); \
1547 JavaValue jvalue(Tag); \
1548 JNI_ArgumentPusherVaArg ap(methodID, args); \
1549 jni_invoke_static(env, &jvalue, nullptr, JNI_STATIC, methodID, &ap, CHECK_(ResultType{})); \
1550 va_end(args); \
1551 ret = jvalue.get_##ResultType(); \
1552 return ret;\
1553 JNI_END
1554
1555 // the runtime type of subword integral basic types is integer
1556 DEFINE_CALLSTATICMETHOD(jboolean, Boolean, T_BOOLEAN
1557 , HOTSPOT_JNI_CALLSTATICBOOLEANMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1558 HOTSPOT_JNI_CALLSTATICBOOLEANMETHOD_RETURN(_ret_ref));
1559 DEFINE_CALLSTATICMETHOD(jbyte, Byte, T_BYTE
1560 , HOTSPOT_JNI_CALLSTATICBYTEMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1561 HOTSPOT_JNI_CALLSTATICBYTEMETHOD_RETURN(_ret_ref));
1562 DEFINE_CALLSTATICMETHOD(jchar, Char, T_CHAR
1563 , HOTSPOT_JNI_CALLSTATICCHARMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1564 HOTSPOT_JNI_CALLSTATICCHARMETHOD_RETURN(_ret_ref));
1565 DEFINE_CALLSTATICMETHOD(jshort, Short, T_SHORT
1566 , HOTSPOT_JNI_CALLSTATICSHORTMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1567 HOTSPOT_JNI_CALLSTATICSHORTMETHOD_RETURN(_ret_ref));
1568
1569 DEFINE_CALLSTATICMETHOD(jobject, Object, T_OBJECT
1570 , HOTSPOT_JNI_CALLSTATICOBJECTMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1571 HOTSPOT_JNI_CALLSTATICOBJECTMETHOD_RETURN(_ret_ref));
1572 DEFINE_CALLSTATICMETHOD(jint, Int, T_INT
1573 , HOTSPOT_JNI_CALLSTATICINTMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1574 HOTSPOT_JNI_CALLSTATICINTMETHOD_RETURN(_ret_ref));
1575 DEFINE_CALLSTATICMETHOD(jlong, Long, T_LONG
1576 , HOTSPOT_JNI_CALLSTATICLONGMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1577 HOTSPOT_JNI_CALLSTATICLONGMETHOD_RETURN(_ret_ref));
1578 // Float and double probes don't return value because dtrace doesn't currently support it
1579 DEFINE_CALLSTATICMETHOD(jfloat, Float, T_FLOAT
1580 , HOTSPOT_JNI_CALLSTATICFLOATMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1581 HOTSPOT_JNI_CALLSTATICFLOATMETHOD_RETURN());
1582 DEFINE_CALLSTATICMETHOD(jdouble, Double, T_DOUBLE
1583 , HOTSPOT_JNI_CALLSTATICDOUBLEMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1584 HOTSPOT_JNI_CALLSTATICDOUBLEMETHOD_RETURN());
1585
1586 #define DEFINE_CALLSTATICMETHODV(ResultType, Result, Tag \
1587 , EntryProbe, ResultProbe) \
1588 \
1589 DT_RETURN_MARK_DECL_FOR(Result, CallStatic##Result##MethodV, ResultType \
1590 , ResultProbe); \
1591 \
1592 JNI_ENTRY(ResultType, \
1593 jni_CallStatic##Result##MethodV(JNIEnv *env, jclass cls, jmethodID methodID, va_list args)) \
1594 \
1595 EntryProbe; \
1596 ResultType ret{}; \
1597 DT_RETURN_MARK_FOR(Result, CallStatic##Result##MethodV, ResultType, \
1598 (const ResultType&)ret);\
1599 \
1600 JavaValue jvalue(Tag); \
1601 JNI_ArgumentPusherVaArg ap(methodID, args); \
1602 /* Make sure class is initialized before trying to invoke its method */ \
1603 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); \
1604 k->initialize(CHECK_(ResultType{})); \
1605 jni_invoke_static(env, &jvalue, nullptr, JNI_STATIC, methodID, &ap, CHECK_(ResultType{})); \
1606 va_end(args); \
1607 ret = jvalue.get_##ResultType(); \
1608 return ret;\
1609 JNI_END
1610
1611 // the runtime type of subword integral basic types is integer
1612 DEFINE_CALLSTATICMETHODV(jboolean, Boolean, T_BOOLEAN
1613 , HOTSPOT_JNI_CALLSTATICBOOLEANMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1614 HOTSPOT_JNI_CALLSTATICBOOLEANMETHODV_RETURN(_ret_ref));
1615 DEFINE_CALLSTATICMETHODV(jbyte, Byte, T_BYTE
1616 , HOTSPOT_JNI_CALLSTATICBYTEMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1617 HOTSPOT_JNI_CALLSTATICBYTEMETHODV_RETURN(_ret_ref));
1618 DEFINE_CALLSTATICMETHODV(jchar, Char, T_CHAR
1619 , HOTSPOT_JNI_CALLSTATICCHARMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1620 HOTSPOT_JNI_CALLSTATICCHARMETHODV_RETURN(_ret_ref));
1621 DEFINE_CALLSTATICMETHODV(jshort, Short, T_SHORT
1622 , HOTSPOT_JNI_CALLSTATICSHORTMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1623 HOTSPOT_JNI_CALLSTATICSHORTMETHODV_RETURN(_ret_ref));
1624
1625 DEFINE_CALLSTATICMETHODV(jobject, Object, T_OBJECT
1626 , HOTSPOT_JNI_CALLSTATICOBJECTMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1627 HOTSPOT_JNI_CALLSTATICOBJECTMETHODV_RETURN(_ret_ref));
1628 DEFINE_CALLSTATICMETHODV(jint, Int, T_INT
1629 , HOTSPOT_JNI_CALLSTATICINTMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1630 HOTSPOT_JNI_CALLSTATICINTMETHODV_RETURN(_ret_ref));
1631 DEFINE_CALLSTATICMETHODV(jlong, Long, T_LONG
1632 , HOTSPOT_JNI_CALLSTATICLONGMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1633 HOTSPOT_JNI_CALLSTATICLONGMETHODV_RETURN(_ret_ref));
1634 // Float and double probes don't return value because dtrace doesn't currently support it
1635 DEFINE_CALLSTATICMETHODV(jfloat, Float, T_FLOAT
1636 , HOTSPOT_JNI_CALLSTATICFLOATMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1637 HOTSPOT_JNI_CALLSTATICFLOATMETHODV_RETURN());
1638 DEFINE_CALLSTATICMETHODV(jdouble, Double, T_DOUBLE
1639 , HOTSPOT_JNI_CALLSTATICDOUBLEMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1640 HOTSPOT_JNI_CALLSTATICDOUBLEMETHODV_RETURN());
1641
1642 #define DEFINE_CALLSTATICMETHODA(ResultType, Result, Tag \
1643 , EntryProbe, ResultProbe) \
1644 \
1645 DT_RETURN_MARK_DECL_FOR(Result, CallStatic##Result##MethodA, ResultType \
1646 , ResultProbe); \
1647 \
1648 JNI_ENTRY(ResultType, \
1649 jni_CallStatic##Result##MethodA(JNIEnv *env, jclass cls, jmethodID methodID, const jvalue *args)) \
1650 \
1651 EntryProbe; \
1652 ResultType ret{}; \
1653 DT_RETURN_MARK_FOR(Result, CallStatic##Result##MethodA, ResultType, \
1654 (const ResultType&)ret);\
1655 \
1656 JavaValue jvalue(Tag); \
1657 JNI_ArgumentPusherArray ap(methodID, args); \
1658 jni_invoke_static(env, &jvalue, nullptr, JNI_STATIC, methodID, &ap, CHECK_(ResultType{})); \
1659 ret = jvalue.get_##ResultType(); \
1660 return ret;\
1661 JNI_END
1662
1663 // the runtime type of subword integral basic types is integer
1664 DEFINE_CALLSTATICMETHODA(jboolean, Boolean, T_BOOLEAN
1665 , HOTSPOT_JNI_CALLSTATICBOOLEANMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1666 HOTSPOT_JNI_CALLSTATICBOOLEANMETHODA_RETURN(_ret_ref));
1667 DEFINE_CALLSTATICMETHODA(jbyte, Byte, T_BYTE
1668 , HOTSPOT_JNI_CALLSTATICBYTEMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1669 HOTSPOT_JNI_CALLSTATICBYTEMETHODA_RETURN(_ret_ref));
1670 DEFINE_CALLSTATICMETHODA(jchar, Char, T_CHAR
1671 , HOTSPOT_JNI_CALLSTATICCHARMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1672 HOTSPOT_JNI_CALLSTATICCHARMETHODA_RETURN(_ret_ref));
1673 DEFINE_CALLSTATICMETHODA(jshort, Short, T_SHORT
1674 , HOTSPOT_JNI_CALLSTATICSHORTMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1675 HOTSPOT_JNI_CALLSTATICSHORTMETHODA_RETURN(_ret_ref));
1676
1677 DEFINE_CALLSTATICMETHODA(jobject, Object, T_OBJECT
1678 , HOTSPOT_JNI_CALLSTATICOBJECTMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1679 HOTSPOT_JNI_CALLSTATICOBJECTMETHODA_RETURN(_ret_ref));
1680 DEFINE_CALLSTATICMETHODA(jint, Int, T_INT
1681 , HOTSPOT_JNI_CALLSTATICINTMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1682 HOTSPOT_JNI_CALLSTATICINTMETHODA_RETURN(_ret_ref));
1683 DEFINE_CALLSTATICMETHODA(jlong, Long, T_LONG
1684 , HOTSPOT_JNI_CALLSTATICLONGMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1685 HOTSPOT_JNI_CALLSTATICLONGMETHODA_RETURN(_ret_ref));
1686 // Float and double probes don't return value because dtrace doesn't currently support it
1687 DEFINE_CALLSTATICMETHODA(jfloat, Float, T_FLOAT
1688 , HOTSPOT_JNI_CALLSTATICFLOATMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1689 HOTSPOT_JNI_CALLSTATICFLOATMETHODA_RETURN());
1690 DEFINE_CALLSTATICMETHODA(jdouble, Double, T_DOUBLE
1691 , HOTSPOT_JNI_CALLSTATICDOUBLEMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1692 HOTSPOT_JNI_CALLSTATICDOUBLEMETHODA_RETURN());
1693
1694 DT_VOID_RETURN_MARK_DECL(CallStaticVoidMethod
1695 , HOTSPOT_JNI_CALLSTATICVOIDMETHOD_RETURN());
1696 DT_VOID_RETURN_MARK_DECL(CallStaticVoidMethodV
1697 , HOTSPOT_JNI_CALLSTATICVOIDMETHODV_RETURN());
1698 DT_VOID_RETURN_MARK_DECL(CallStaticVoidMethodA
1699 , HOTSPOT_JNI_CALLSTATICVOIDMETHODA_RETURN());
1700
1701 JNI_ENTRY(void, jni_CallStaticVoidMethod(JNIEnv *env, jclass cls, jmethodID methodID, ...))
1702 HOTSPOT_JNI_CALLSTATICVOIDMETHOD_ENTRY(env, cls, (uintptr_t) methodID);
1703 DT_VOID_RETURN_MARK(CallStaticVoidMethod);
1704
1705 va_list args;
1706 va_start(args, methodID);
1707 JavaValue jvalue(T_VOID);
1708 JNI_ArgumentPusherVaArg ap(methodID, args);
1709 jni_invoke_static(env, &jvalue, nullptr, JNI_STATIC, methodID, &ap, CHECK);
1710 va_end(args);
1711 JNI_END
1712
1713
1714 JNI_ENTRY(void, jni_CallStaticVoidMethodV(JNIEnv *env, jclass cls, jmethodID methodID, va_list args))
1715 HOTSPOT_JNI_CALLSTATICVOIDMETHODV_ENTRY(env, cls, (uintptr_t) methodID);
1716 DT_VOID_RETURN_MARK(CallStaticVoidMethodV);
1717
1718 JavaValue jvalue(T_VOID);
1719 JNI_ArgumentPusherVaArg ap(methodID, args);
1720 jni_invoke_static(env, &jvalue, nullptr, JNI_STATIC, methodID, &ap, CHECK);
1721 JNI_END
1722
1723
1724 JNI_ENTRY(void, jni_CallStaticVoidMethodA(JNIEnv *env, jclass cls, jmethodID methodID, const jvalue *args))
1725 HOTSPOT_JNI_CALLSTATICVOIDMETHODA_ENTRY(env, cls, (uintptr_t) methodID);
1726 DT_VOID_RETURN_MARK(CallStaticVoidMethodA);
1727
1728 JavaValue jvalue(T_VOID);
1729 JNI_ArgumentPusherArray ap(methodID, args);
1730 jni_invoke_static(env, &jvalue, nullptr, JNI_STATIC, methodID, &ap, CHECK);
1731 JNI_END
1732
1733
1734 //
1735 // Accessing Fields
1736 //
1737
1738
1739 DT_RETURN_MARK_DECL(GetFieldID, jfieldID
1740 , HOTSPOT_JNI_GETFIELDID_RETURN((uintptr_t)_ret_ref));
1741
1742 JNI_ENTRY(jfieldID, jni_GetFieldID(JNIEnv *env, jclass clazz,
1743 const char *name, const char *sig))
1744 HOTSPOT_JNI_GETFIELDID_ENTRY(env, clazz, (char *) name, (char *) sig);
1745 jfieldID ret = nullptr;
1746 DT_RETURN_MARK(GetFieldID, jfieldID, (const jfieldID&)ret);
1747
1748 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz));
1749
1750 // The class should have been loaded (we have an instance of the class
1751 // passed in) so the field and signature should already be in the symbol
1752 // table. If they're not there, the field doesn't exist.
1753 TempNewSymbol fieldname = SymbolTable::probe(name, (int)strlen(name));
1754 TempNewSymbol signame = SymbolTable::probe(sig, (int)strlen(sig));
1755 if (fieldname == nullptr || signame == nullptr) {
1756 ResourceMark rm;
1757 THROW_MSG_NULL(vmSymbols::java_lang_NoSuchFieldError(), err_msg("%s.%s %s", k->external_name(), name, sig));
1758 }
1759
1760 // Make sure class is initialized before handing id's out to fields
1761 k->initialize(CHECK_NULL);
1762
1763 fieldDescriptor fd;
1764 if (!k->is_instance_klass() ||
1765 !InstanceKlass::cast(k)->find_field(fieldname, signame, false, &fd)) {
1766 ResourceMark rm;
1767 THROW_MSG_NULL(vmSymbols::java_lang_NoSuchFieldError(), err_msg("%s.%s %s", k->external_name(), name, sig));
1768 }
1769
1770 // A jfieldID for a non-static field is simply the offset of the field within the instanceOop
1771 // It may also have hash bits for k, if VerifyJNIFields is turned on.
1772 ret = jfieldIDWorkaround::to_instance_jfieldID(k, fd.offset());
1773 return ret;
1774 JNI_END
1775
1776
1777 JNI_ENTRY(jobject, jni_GetObjectField(JNIEnv *env, jobject obj, jfieldID fieldID))
1778 HOTSPOT_JNI_GETOBJECTFIELD_ENTRY(env, obj, (uintptr_t) fieldID);
1779 oop o = JNIHandles::resolve_non_null(obj);
1780 Klass* k = o->klass();
1781 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID);
1782 // Keep JVMTI addition small and only check enabled flag here.
1783 // jni_GetField_probe() assumes that is okay to create handles.
1784 if (JvmtiExport::should_post_field_access()) {
1785 o = JvmtiExport::jni_GetField_probe(thread, obj, o, k, fieldID, false);
1786 }
1787 oop loaded_obj = HeapAccess<ON_UNKNOWN_OOP_REF>::oop_load_at(o, offset);
1788 jobject ret = JNIHandles::make_local(THREAD, loaded_obj);
1789 HOTSPOT_JNI_GETOBJECTFIELD_RETURN(ret);
1790 return ret;
1791 JNI_END
1792
1793
1794
1795 #define DEFINE_GETFIELD(Return,Fieldname,Result \
1796 , EntryProbe, ReturnProbe) \
1797 \
1798 DT_RETURN_MARK_DECL_FOR(Result, Get##Result##Field, Return \
1799 , ReturnProbe); \
1800 \
1801 JNI_ENTRY_NO_PRESERVE(Return, jni_Get##Result##Field(JNIEnv *env, jobject obj, jfieldID fieldID)) \
1802 \
1803 EntryProbe; \
1804 Return ret = 0;\
1805 DT_RETURN_MARK_FOR(Result, Get##Result##Field, Return, (const Return&)ret);\
1806 \
1807 oop o = JNIHandles::resolve_non_null(obj); \
1808 Klass* k = o->klass(); \
1809 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID); \
1810 /* Keep JVMTI addition small and only check enabled flag here. */ \
1811 if (JvmtiExport::should_post_field_access()) { \
1812 o = JvmtiExport::jni_GetField_probe(thread, obj, o, k, fieldID, false); \
1813 } \
1814 ret = o->Fieldname##_field(offset); \
1815 return ret; \
1816 JNI_END
1817
1818 DEFINE_GETFIELD(jboolean, bool, Boolean
1819 , HOTSPOT_JNI_GETBOOLEANFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
1820 HOTSPOT_JNI_GETBOOLEANFIELD_RETURN(_ret_ref))
1821 DEFINE_GETFIELD(jbyte, byte, Byte
1822 , HOTSPOT_JNI_GETBYTEFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
1823 HOTSPOT_JNI_GETBYTEFIELD_RETURN(_ret_ref))
1824 DEFINE_GETFIELD(jchar, char, Char
1825 , HOTSPOT_JNI_GETCHARFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
1826 HOTSPOT_JNI_GETCHARFIELD_RETURN(_ret_ref))
1827 DEFINE_GETFIELD(jshort, short, Short
1828 , HOTSPOT_JNI_GETSHORTFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
1829 HOTSPOT_JNI_GETSHORTFIELD_RETURN(_ret_ref))
1830 DEFINE_GETFIELD(jint, int, Int
1831 , HOTSPOT_JNI_GETINTFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
1832 HOTSPOT_JNI_GETINTFIELD_RETURN(_ret_ref))
1833 DEFINE_GETFIELD(jlong, long, Long
1834 , HOTSPOT_JNI_GETLONGFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
1835 HOTSPOT_JNI_GETLONGFIELD_RETURN(_ret_ref))
1836 // Float and double probes don't return value because dtrace doesn't currently support it
1837 DEFINE_GETFIELD(jfloat, float, Float
1838 , HOTSPOT_JNI_GETFLOATFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
1839 HOTSPOT_JNI_GETFLOATFIELD_RETURN())
1840 DEFINE_GETFIELD(jdouble, double, Double
1841 , HOTSPOT_JNI_GETDOUBLEFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
1842 HOTSPOT_JNI_GETDOUBLEFIELD_RETURN())
1843
1844 address jni_GetBooleanField_addr() {
1845 return (address)jni_GetBooleanField;
1846 }
1847 address jni_GetByteField_addr() {
1848 return (address)jni_GetByteField;
1849 }
1850 address jni_GetCharField_addr() {
1851 return (address)jni_GetCharField;
1852 }
1853 address jni_GetShortField_addr() {
1854 return (address)jni_GetShortField;
1855 }
1856 address jni_GetIntField_addr() {
1857 return (address)jni_GetIntField;
1858 }
1859 address jni_GetLongField_addr() {
1860 return (address)jni_GetLongField;
1861 }
1862 address jni_GetFloatField_addr() {
1863 return (address)jni_GetFloatField;
1864 }
1865 address jni_GetDoubleField_addr() {
1866 return (address)jni_GetDoubleField;
1867 }
1868
1869 static void log_debug_if_final_static_field(JavaThread* current, const char* func_name, InstanceKlass* ik, int offset) {
1870 if (log_is_enabled(Debug, jni)) {
1871 fieldDescriptor fd;
1872 bool found = ik->find_field_from_offset(offset, true, &fd);
1873 assert(found, "bad field offset");
1874 assert(fd.is_static(), "static/instance mismatch");
1875 if (fd.is_final() && !fd.is_mutable_static_final()) {
1876 ResourceMark rm(current);
1877 log_debug(jni)("%s mutated final static field %s.%s", func_name, ik->external_name(), fd.name()->as_C_string());
1878 }
1879 }
1880 }
1881
1882 static void log_debug_if_final_instance_field(JavaThread* current, const char* func_name, InstanceKlass* ik, int offset) {
1883 if (log_is_enabled(Debug, jni)) {
1884 fieldDescriptor fd;
1885 bool found = ik->find_field_from_offset(offset, false, &fd);
1886 assert(found, "bad field offset");
1887 assert(!fd.is_static(), "static/instance mismatch");
1888 if (fd.is_final()) {
1889 ResourceMark rm(current);
1890 log_debug(jni)("%s mutated final instance field %s.%s", func_name, ik->external_name(), fd.name()->as_C_string());
1891 }
1892 }
1893 }
1894
1895 JNI_ENTRY_NO_PRESERVE(void, jni_SetObjectField(JNIEnv *env, jobject obj, jfieldID fieldID, jobject value))
1896 HOTSPOT_JNI_SETOBJECTFIELD_ENTRY(env, obj, (uintptr_t) fieldID, value);
1897 oop o = JNIHandles::resolve_non_null(obj);
1898 Klass* k = o->klass();
1899 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID);
1900 // Keep JVMTI addition small and only check enabled flag here.
1901 if (JvmtiExport::should_post_field_modification()) {
1902 jvalue field_value;
1903 field_value.l = value;
1904 o = JvmtiExport::jni_SetField_probe(thread, obj, o, k, fieldID, false, JVM_SIGNATURE_CLASS, (jvalue *)&field_value);
1905 }
1906 HeapAccess<ON_UNKNOWN_OOP_REF>::oop_store_at(o, offset, JNIHandles::resolve(value));
1907 log_debug_if_final_instance_field(thread, "SetObjectField", InstanceKlass::cast(k), offset);
1908 HOTSPOT_JNI_SETOBJECTFIELD_RETURN();
1909 JNI_END
1910
1911 // TODO: make this a template
1912
1913 #define DEFINE_SETFIELD(Argument,Fieldname,Result,SigType,unionType \
1914 , EntryProbe, ReturnProbe) \
1915 \
1916 JNI_ENTRY_NO_PRESERVE(void, jni_Set##Result##Field(JNIEnv *env, jobject obj, jfieldID fieldID, Argument value)) \
1917 \
1918 EntryProbe; \
1919 \
1920 oop o = JNIHandles::resolve_non_null(obj); \
1921 Klass* k = o->klass(); \
1922 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID); \
1923 /* Keep JVMTI addition small and only check enabled flag here. */ \
1924 if (JvmtiExport::should_post_field_modification()) { \
1925 jvalue field_value; \
1926 field_value.unionType = value; \
1927 o = JvmtiExport::jni_SetField_probe(thread, obj, o, k, fieldID, false, SigType, (jvalue *)&field_value); \
1928 } \
1929 o->Fieldname##_field_put(offset, value); \
1930 log_debug_if_final_instance_field(thread, "Set<Type>Field", InstanceKlass::cast(k), offset); \
1931 ReturnProbe; \
1932 JNI_END
1933
1934 DEFINE_SETFIELD(jboolean, bool, Boolean, JVM_SIGNATURE_BOOLEAN, z
1935 , HOTSPOT_JNI_SETBOOLEANFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value),
1936 HOTSPOT_JNI_SETBOOLEANFIELD_RETURN())
1937 DEFINE_SETFIELD(jbyte, byte, Byte, JVM_SIGNATURE_BYTE, b
1938 , HOTSPOT_JNI_SETBYTEFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value),
1939 HOTSPOT_JNI_SETBYTEFIELD_RETURN())
1940 DEFINE_SETFIELD(jchar, char, Char, JVM_SIGNATURE_CHAR, c
1941 , HOTSPOT_JNI_SETCHARFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value),
1942 HOTSPOT_JNI_SETCHARFIELD_RETURN())
1943 DEFINE_SETFIELD(jshort, short, Short, JVM_SIGNATURE_SHORT, s
1944 , HOTSPOT_JNI_SETSHORTFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value),
1945 HOTSPOT_JNI_SETSHORTFIELD_RETURN())
1946 DEFINE_SETFIELD(jint, int, Int, JVM_SIGNATURE_INT, i
1947 , HOTSPOT_JNI_SETINTFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value),
1948 HOTSPOT_JNI_SETINTFIELD_RETURN())
1949 DEFINE_SETFIELD(jlong, long, Long, JVM_SIGNATURE_LONG, j
1950 , HOTSPOT_JNI_SETLONGFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value),
1951 HOTSPOT_JNI_SETLONGFIELD_RETURN())
1952 // Float and double probes don't return value because dtrace doesn't currently support it
1953 DEFINE_SETFIELD(jfloat, float, Float, JVM_SIGNATURE_FLOAT, f
1954 , HOTSPOT_JNI_SETFLOATFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
1955 HOTSPOT_JNI_SETFLOATFIELD_RETURN())
1956 DEFINE_SETFIELD(jdouble, double, Double, JVM_SIGNATURE_DOUBLE, d
1957 , HOTSPOT_JNI_SETDOUBLEFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
1958 HOTSPOT_JNI_SETDOUBLEFIELD_RETURN())
1959
1960 DT_RETURN_MARK_DECL(ToReflectedField, jobject
1961 , HOTSPOT_JNI_TOREFLECTEDFIELD_RETURN(_ret_ref));
1962
1963 JNI_ENTRY(jobject, jni_ToReflectedField(JNIEnv *env, jclass cls, jfieldID fieldID, jboolean isStatic))
1964 HOTSPOT_JNI_TOREFLECTEDFIELD_ENTRY(env, cls, (uintptr_t) fieldID, isStatic);
1965 jobject ret = nullptr;
1966 DT_RETURN_MARK(ToReflectedField, jobject, (const jobject&)ret);
1967
1968 fieldDescriptor fd;
1969 bool found = false;
1970 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
1971
1972 assert(jfieldIDWorkaround::is_static_jfieldID(fieldID) == (isStatic != 0), "invalid fieldID");
1973
1974 if (isStatic) {
1975 // Static field. The fieldID a JNIid specifying the field holder and the offset within the Klass*.
1976 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID);
1977 assert(id->is_static_field_id(), "invalid static field id");
1978 found = id->find_local_field(&fd);
1979 } else {
1980 // Non-static field. The fieldID is really the offset of the field within the instanceOop.
1981 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID);
1982 found = InstanceKlass::cast(k)->find_field_from_offset(offset, false, &fd);
1983 }
1984 assert(found, "bad fieldID passed into jni_ToReflectedField");
1985 oop reflected = Reflection::new_field(&fd, CHECK_NULL);
1986 ret = JNIHandles::make_local(THREAD, reflected);
1987 return ret;
1988 JNI_END
1989
1990
1991 //
1992 // Accessing Static Fields
1993 //
1994 DT_RETURN_MARK_DECL(GetStaticFieldID, jfieldID
1995 , HOTSPOT_JNI_GETSTATICFIELDID_RETURN((uintptr_t)_ret_ref));
1996
1997 JNI_ENTRY(jfieldID, jni_GetStaticFieldID(JNIEnv *env, jclass clazz,
1998 const char *name, const char *sig))
1999 HOTSPOT_JNI_GETSTATICFIELDID_ENTRY(env, clazz, (char *) name, (char *) sig);
2000 jfieldID ret = nullptr;
2001 DT_RETURN_MARK(GetStaticFieldID, jfieldID, (const jfieldID&)ret);
2002
2003 // The class should have been loaded (we have an instance of the class
2004 // passed in) so the field and signature should already be in the symbol
2005 // table. If they're not there, the field doesn't exist.
2006 TempNewSymbol fieldname = SymbolTable::probe(name, (int)strlen(name));
2007 TempNewSymbol signame = SymbolTable::probe(sig, (int)strlen(sig));
2008 if (fieldname == nullptr || signame == nullptr) {
2009 THROW_MSG_NULL(vmSymbols::java_lang_NoSuchFieldError(), (char*) name);
2010 }
2011 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz));
2012 // Make sure class is initialized before handing id's out to static fields
2013 k->initialize(CHECK_NULL);
2014
2015 fieldDescriptor fd;
2016 if (!k->is_instance_klass() ||
2017 !InstanceKlass::cast(k)->find_field(fieldname, signame, true, &fd)) {
2018 THROW_MSG_NULL(vmSymbols::java_lang_NoSuchFieldError(), (char*) name);
2019 }
2020
2021 // A jfieldID for a static field is a JNIid specifying the field holder and the offset within the Klass*
2022 JNIid* id = fd.field_holder()->jni_id_for(fd.offset());
2023 DEBUG_ONLY(id->set_is_static_field_id();)
2024
2025 DEBUG_ONLY(id->verify(fd.field_holder()));
2026
2027 ret = jfieldIDWorkaround::to_static_jfieldID(id);
2028 return ret;
2029 JNI_END
2030
2031
2032 JNI_ENTRY(jobject, jni_GetStaticObjectField(JNIEnv *env, jclass clazz, jfieldID fieldID))
2033 HOTSPOT_JNI_GETSTATICOBJECTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID);
2034 #if INCLUDE_JNI_CHECK
2035 DEBUG_ONLY(Klass* param_k = jniCheck::validate_class(thread, clazz);)
2036 #endif // INCLUDE_JNI_CHECK
2037 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID);
2038 assert(id->is_static_field_id(), "invalid static field id");
2039 // Keep JVMTI addition small and only check enabled flag here.
2040 // jni_GetField_probe() assumes that is okay to create handles.
2041 if (JvmtiExport::should_post_field_access()) {
2042 JvmtiExport::jni_GetField_probe(thread, nullptr, nullptr, id->holder(), fieldID, true);
2043 }
2044 jobject ret = JNIHandles::make_local(THREAD, id->holder()->java_mirror()->obj_field(id->offset()));
2045 HOTSPOT_JNI_GETSTATICOBJECTFIELD_RETURN(ret);
2046 return ret;
2047 JNI_END
2048
2049
2050 #define DEFINE_GETSTATICFIELD(Return,Fieldname,Result \
2051 , EntryProbe, ReturnProbe) \
2052 \
2053 DT_RETURN_MARK_DECL_FOR(Result, GetStatic##Result##Field, Return \
2054 , ReturnProbe); \
2055 \
2056 JNI_ENTRY(Return, jni_GetStatic##Result##Field(JNIEnv *env, jclass clazz, jfieldID fieldID)) \
2057 EntryProbe; \
2058 Return ret = 0;\
2059 DT_RETURN_MARK_FOR(Result, GetStatic##Result##Field, Return, \
2060 (const Return&)ret);\
2061 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID); \
2062 assert(id->is_static_field_id(), "invalid static field id"); \
2063 /* Keep JVMTI addition small and only check enabled flag here. */ \
2064 /* jni_GetField_probe() assumes that is okay to create handles. */ \
2065 if (JvmtiExport::should_post_field_access()) { \
2066 JvmtiExport::jni_GetField_probe(thread, nullptr, nullptr, id->holder(), fieldID, true); \
2067 } \
2068 ret = id->holder()->java_mirror()-> Fieldname##_field (id->offset()); \
2069 return ret;\
2070 JNI_END
2071
2072 DEFINE_GETSTATICFIELD(jboolean, bool, Boolean
2073 , HOTSPOT_JNI_GETSTATICBOOLEANFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICBOOLEANFIELD_RETURN(_ret_ref))
2074 DEFINE_GETSTATICFIELD(jbyte, byte, Byte
2075 , HOTSPOT_JNI_GETSTATICBYTEFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICBYTEFIELD_RETURN(_ret_ref) )
2076 DEFINE_GETSTATICFIELD(jchar, char, Char
2077 , HOTSPOT_JNI_GETSTATICCHARFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICCHARFIELD_RETURN(_ret_ref) )
2078 DEFINE_GETSTATICFIELD(jshort, short, Short
2079 , HOTSPOT_JNI_GETSTATICSHORTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICSHORTFIELD_RETURN(_ret_ref) )
2080 DEFINE_GETSTATICFIELD(jint, int, Int
2081 , HOTSPOT_JNI_GETSTATICINTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICINTFIELD_RETURN(_ret_ref) )
2082 DEFINE_GETSTATICFIELD(jlong, long, Long
2083 , HOTSPOT_JNI_GETSTATICLONGFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICLONGFIELD_RETURN(_ret_ref) )
2084 // Float and double probes don't return value because dtrace doesn't currently support it
2085 DEFINE_GETSTATICFIELD(jfloat, float, Float
2086 , HOTSPOT_JNI_GETSTATICFLOATFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICFLOATFIELD_RETURN() )
2087 DEFINE_GETSTATICFIELD(jdouble, double, Double
2088 , HOTSPOT_JNI_GETSTATICDOUBLEFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICDOUBLEFIELD_RETURN() )
2089
2090 JNI_ENTRY(void, jni_SetStaticObjectField(JNIEnv *env, jclass clazz, jfieldID fieldID, jobject value))
2091 HOTSPOT_JNI_SETSTATICOBJECTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value);
2092 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID);
2093 assert(id->is_static_field_id(), "invalid static field id");
2094 // Keep JVMTI addition small and only check enabled flag here.
2095 // jni_SetField_probe() assumes that is okay to create handles.
2096 if (JvmtiExport::should_post_field_modification()) {
2097 jvalue field_value;
2098 field_value.l = value;
2099 JvmtiExport::jni_SetField_probe(thread, nullptr, nullptr, id->holder(), fieldID, true, JVM_SIGNATURE_CLASS, (jvalue *)&field_value);
2100 }
2101 id->holder()->java_mirror()->obj_field_put(id->offset(), JNIHandles::resolve(value));
2102 log_debug_if_final_static_field(THREAD, "SetStaticObjectField", id->holder(), id->offset());
2103 HOTSPOT_JNI_SETSTATICOBJECTFIELD_RETURN();
2104 JNI_END
2105
2106
2107
2108 #define DEFINE_SETSTATICFIELD(Argument,Fieldname,Result,SigType,unionType \
2109 , EntryProbe, ReturnProbe) \
2110 \
2111 JNI_ENTRY(void, jni_SetStatic##Result##Field(JNIEnv *env, jclass clazz, jfieldID fieldID, Argument value)) \
2112 EntryProbe; \
2113 \
2114 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID); \
2115 assert(id->is_static_field_id(), "invalid static field id"); \
2116 /* Keep JVMTI addition small and only check enabled flag here. */ \
2117 /* jni_SetField_probe() assumes that is okay to create handles. */ \
2118 if (JvmtiExport::should_post_field_modification()) { \
2119 jvalue field_value; \
2120 field_value.unionType = value; \
2121 JvmtiExport::jni_SetField_probe(thread, nullptr, nullptr, id->holder(), fieldID, true, SigType, (jvalue *)&field_value); \
2122 } \
2123 id->holder()->java_mirror()-> Fieldname##_field_put (id->offset(), value); \
2124 log_debug_if_final_static_field(THREAD, "SetStatic<Type>Field", id->holder(), id->offset()); \
2125 ReturnProbe;\
2126 JNI_END
2127
2128 DEFINE_SETSTATICFIELD(jboolean, bool, Boolean, JVM_SIGNATURE_BOOLEAN, z
2129 , HOTSPOT_JNI_SETSTATICBOOLEANFIELD_ENTRY(env, clazz, (uintptr_t)fieldID, value),
2130 HOTSPOT_JNI_SETSTATICBOOLEANFIELD_RETURN())
2131 DEFINE_SETSTATICFIELD(jbyte, byte, Byte, JVM_SIGNATURE_BYTE, b
2132 , HOTSPOT_JNI_SETSTATICBYTEFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value),
2133 HOTSPOT_JNI_SETSTATICBYTEFIELD_RETURN())
2134 DEFINE_SETSTATICFIELD(jchar, char, Char, JVM_SIGNATURE_CHAR, c
2135 , HOTSPOT_JNI_SETSTATICCHARFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value),
2136 HOTSPOT_JNI_SETSTATICCHARFIELD_RETURN())
2137 DEFINE_SETSTATICFIELD(jshort, short, Short, JVM_SIGNATURE_SHORT, s
2138 , HOTSPOT_JNI_SETSTATICSHORTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value),
2139 HOTSPOT_JNI_SETSTATICSHORTFIELD_RETURN())
2140 DEFINE_SETSTATICFIELD(jint, int, Int, JVM_SIGNATURE_INT, i
2141 , HOTSPOT_JNI_SETSTATICINTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value),
2142 HOTSPOT_JNI_SETSTATICINTFIELD_RETURN())
2143 DEFINE_SETSTATICFIELD(jlong, long, Long, JVM_SIGNATURE_LONG, j
2144 , HOTSPOT_JNI_SETSTATICLONGFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value),
2145 HOTSPOT_JNI_SETSTATICLONGFIELD_RETURN())
2146 // Float and double probes don't return value because dtrace doesn't currently support it
2147 DEFINE_SETSTATICFIELD(jfloat, float, Float, JVM_SIGNATURE_FLOAT, f
2148 , HOTSPOT_JNI_SETSTATICFLOATFIELD_ENTRY(env, clazz, (uintptr_t) fieldID),
2149 HOTSPOT_JNI_SETSTATICFLOATFIELD_RETURN())
2150 DEFINE_SETSTATICFIELD(jdouble, double, Double, JVM_SIGNATURE_DOUBLE, d
2151 , HOTSPOT_JNI_SETSTATICDOUBLEFIELD_ENTRY(env, clazz, (uintptr_t) fieldID),
2152 HOTSPOT_JNI_SETSTATICDOUBLEFIELD_RETURN())
2153
2154 //
2155 // String Operations
2156 //
2157
2158 // Unicode Interface
2159
2160 DT_RETURN_MARK_DECL(NewString, jstring
2161 , HOTSPOT_JNI_NEWSTRING_RETURN(_ret_ref));
2162
2163 JNI_ENTRY(jstring, jni_NewString(JNIEnv *env, const jchar *unicodeChars, jsize len))
2164 HOTSPOT_JNI_NEWSTRING_ENTRY(env, (uint16_t *) unicodeChars, len);
2165 jstring ret = nullptr;
2166 DT_RETURN_MARK(NewString, jstring, (const jstring&)ret);
2167 oop string=java_lang_String::create_oop_from_unicode((jchar*) unicodeChars, len, CHECK_NULL);
2168 ret = (jstring) JNIHandles::make_local(THREAD, string);
2169 return ret;
2170 JNI_END
2171
2172
2173 JNI_ENTRY_NO_PRESERVE(jsize, jni_GetStringLength(JNIEnv *env, jstring string))
2174 HOTSPOT_JNI_GETSTRINGLENGTH_ENTRY(env, string);
2175 jsize ret = 0;
2176 oop s = JNIHandles::resolve_non_null(string);
2177 ret = java_lang_String::length(s);
2178 HOTSPOT_JNI_GETSTRINGLENGTH_RETURN(ret);
2179 return ret;
2180 JNI_END
2181
2182
2183 JNI_ENTRY_NO_PRESERVE(const jchar*, jni_GetStringChars(
2184 JNIEnv *env, jstring string, jboolean *isCopy))
2185 HOTSPOT_JNI_GETSTRINGCHARS_ENTRY(env, string, (uintptr_t *) isCopy);
2186 jchar* buf = nullptr;
2187 oop s = JNIHandles::resolve_non_null(string);
2188 typeArrayOop s_value = java_lang_String::value(s);
2189 if (s_value != nullptr) {
2190 int s_len = java_lang_String::length(s, s_value);
2191 bool is_latin1 = java_lang_String::is_latin1(s);
2192 buf = NEW_C_HEAP_ARRAY_RETURN_NULL(jchar, s_len + 1, mtInternal); // add one for zero termination
2193 /* JNI Specification states return null on OOM */
2194 if (buf != nullptr) {
2195 if (s_len > 0) {
2196 if (!is_latin1) {
2197 ArrayAccess<>::arraycopy_to_native(s_value, (size_t) typeArrayOopDesc::element_offset<jchar>(0),
2198 buf, s_len);
2199 } else {
2200 for (int i = 0; i < s_len; i++) {
2201 buf[i] = ((jchar) s_value->byte_at(i)) & 0xff;
2202 }
2203 }
2204 }
2205 buf[s_len] = 0;
2206 //%note jni_5
2207 if (isCopy != nullptr) {
2208 *isCopy = JNI_TRUE;
2209 }
2210 }
2211 }
2212 HOTSPOT_JNI_GETSTRINGCHARS_RETURN(buf);
2213 return buf;
2214 JNI_END
2215
2216
2217 JNI_ENTRY_NO_PRESERVE(void, jni_ReleaseStringChars(JNIEnv *env, jstring str, const jchar *chars))
2218 HOTSPOT_JNI_RELEASESTRINGCHARS_ENTRY(env, str, (uint16_t *) chars);
2219 //%note jni_6
2220 if (chars != nullptr) {
2221 // Since String objects are supposed to be immutable, don't copy any
2222 // new data back. A bad user will have to go after the char array.
2223 FreeHeap((void*) chars);
2224 }
2225 HOTSPOT_JNI_RELEASESTRINGCHARS_RETURN();
2226 JNI_END
2227
2228
2229 // UTF Interface
2230
2231 DT_RETURN_MARK_DECL(NewStringUTF, jstring
2232 , HOTSPOT_JNI_NEWSTRINGUTF_RETURN(_ret_ref));
2233
2234 JNI_ENTRY(jstring, jni_NewStringUTF(JNIEnv *env, const char *bytes))
2235 HOTSPOT_JNI_NEWSTRINGUTF_ENTRY(env, (char *) bytes);
2236 jstring ret;
2237 DT_RETURN_MARK(NewStringUTF, jstring, (const jstring&)ret);
2238
2239 oop result = java_lang_String::create_oop_from_str((char*) bytes, CHECK_NULL);
2240 ret = (jstring) JNIHandles::make_local(THREAD, result);
2241 return ret;
2242 JNI_END
2243
2244
2245 JNI_ENTRY(jsize, jni_GetStringUTFLength(JNIEnv *env, jstring string))
2246 HOTSPOT_JNI_GETSTRINGUTFLENGTH_ENTRY(env, string);
2247 oop java_string = JNIHandles::resolve_non_null(string);
2248 jsize ret = java_lang_String::utf8_length_as_int(java_string);
2249 HOTSPOT_JNI_GETSTRINGUTFLENGTH_RETURN(ret);
2250 return ret;
2251 JNI_END
2252
2253 JNI_ENTRY(jlong, jni_GetStringUTFLengthAsLong(JNIEnv *env, jstring string))
2254 HOTSPOT_JNI_GETSTRINGUTFLENGTHASLONG_ENTRY(env, string);
2255 oop java_string = JNIHandles::resolve_non_null(string);
2256 size_t ret = java_lang_String::utf8_length(java_string);
2257 HOTSPOT_JNI_GETSTRINGUTFLENGTHASLONG_RETURN(ret);
2258 return checked_cast<jlong>(ret);
2259 JNI_END
2260
2261
2262 JNI_ENTRY(const char*, jni_GetStringUTFChars(JNIEnv *env, jstring string, jboolean *isCopy))
2263 HOTSPOT_JNI_GETSTRINGUTFCHARS_ENTRY(env, string, (uintptr_t *) isCopy);
2264 char* result = nullptr;
2265 oop java_string = JNIHandles::resolve_non_null(string);
2266 typeArrayOop s_value = java_lang_String::value(java_string);
2267 if (s_value != nullptr) {
2268 size_t length = java_lang_String::utf8_length(java_string, s_value);
2269 // JNI Specification states return null on OOM.
2270 // The resulting sequence doesn't have to be NUL-terminated but we do.
2271 result = AllocateHeap(length + 1, mtInternal, AllocFailStrategy::RETURN_NULL);
2272 if (result != nullptr) {
2273 java_lang_String::as_utf8_string(java_string, s_value, result, length + 1);
2274 if (isCopy != nullptr) {
2275 *isCopy = JNI_TRUE;
2276 }
2277 }
2278 }
2279 HOTSPOT_JNI_GETSTRINGUTFCHARS_RETURN(result);
2280 return result;
2281 JNI_END
2282
2283
2284 JNI_LEAF(void, jni_ReleaseStringUTFChars(JNIEnv *env, jstring str, const char *chars))
2285 HOTSPOT_JNI_RELEASESTRINGUTFCHARS_ENTRY(env, str, (char *) chars);
2286 if (chars != nullptr) {
2287 FreeHeap((char*) chars);
2288 }
2289 HOTSPOT_JNI_RELEASESTRINGUTFCHARS_RETURN();
2290 JNI_END
2291
2292
2293 JNI_ENTRY_NO_PRESERVE(jsize, jni_GetArrayLength(JNIEnv *env, jarray array))
2294 HOTSPOT_JNI_GETARRAYLENGTH_ENTRY(env, array);
2295 arrayOop a = arrayOop(JNIHandles::resolve_non_null(array));
2296 assert(a->is_array(), "must be array");
2297 jsize ret = a->length();
2298 HOTSPOT_JNI_GETARRAYLENGTH_RETURN(ret);
2299 return ret;
2300 JNI_END
2301
2302
2303 //
2304 // Object Array Operations
2305 //
2306
2307 DT_RETURN_MARK_DECL(NewObjectArray, jobjectArray
2308 , HOTSPOT_JNI_NEWOBJECTARRAY_RETURN(_ret_ref));
2309
2310 JNI_ENTRY(jobjectArray, jni_NewObjectArray(JNIEnv *env, jsize length, jclass elementClass, jobject initialElement))
2311 HOTSPOT_JNI_NEWOBJECTARRAY_ENTRY(env, length, elementClass, initialElement);
2312 jobjectArray ret = nullptr;
2313 DT_RETURN_MARK(NewObjectArray, jobjectArray, (const jobjectArray&)ret);
2314 Klass* ek = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(elementClass));
2315
2316 // Make sure bottom_klass is initialized.
2317 ek->initialize(CHECK_NULL);
2318 objArrayOop result = oopFactory::new_objArray(ek, length, CHECK_NULL);
2319
2320 oop initial_value = JNIHandles::resolve(initialElement);
2321 if (initial_value != nullptr) { // array already initialized with null
2322 for (int index = 0; index < length; index++) {
2323 result->obj_at_put(index, initial_value);
2324 }
2325 }
2326 ret = (jobjectArray) JNIHandles::make_local(THREAD, result);
2327 return ret;
2328 JNI_END
2329
2330 DT_RETURN_MARK_DECL(GetObjectArrayElement, jobject
2331 , HOTSPOT_JNI_GETOBJECTARRAYELEMENT_RETURN(_ret_ref));
2332
2333 JNI_ENTRY(jobject, jni_GetObjectArrayElement(JNIEnv *env, jobjectArray array, jsize index))
2334 HOTSPOT_JNI_GETOBJECTARRAYELEMENT_ENTRY(env, array, index);
2335 jobject ret = nullptr;
2336 DT_RETURN_MARK(GetObjectArrayElement, jobject, (const jobject&)ret);
2337 objArrayOop a = objArrayOop(JNIHandles::resolve_non_null(array));
2338 if (a->is_within_bounds(index)) {
2339 ret = JNIHandles::make_local(THREAD, a->obj_at(index));
2340 return ret;
2341 } else {
2342 ResourceMark rm(THREAD);
2343 stringStream ss;
2344 ss.print("Index %d out of bounds for length %d", index, a->length());
2345 THROW_MSG_NULL(vmSymbols::java_lang_ArrayIndexOutOfBoundsException(), ss.as_string());
2346 }
2347 JNI_END
2348
2349 DT_VOID_RETURN_MARK_DECL(SetObjectArrayElement
2350 , HOTSPOT_JNI_SETOBJECTARRAYELEMENT_RETURN());
2351
2352 JNI_ENTRY(void, jni_SetObjectArrayElement(JNIEnv *env, jobjectArray array, jsize index, jobject value))
2353 HOTSPOT_JNI_SETOBJECTARRAYELEMENT_ENTRY(env, array, index, value);
2354 DT_VOID_RETURN_MARK(SetObjectArrayElement);
2355
2356 objArrayOop a = objArrayOop(JNIHandles::resolve_non_null(array));
2357 oop v = JNIHandles::resolve(value);
2358 if (a->is_within_bounds(index)) {
2359 if (v == nullptr || v->is_a(ObjArrayKlass::cast(a->klass())->element_klass())) {
2360 a->obj_at_put(index, v);
2361 } else {
2362 ResourceMark rm(THREAD);
2363 stringStream ss;
2364 Klass *bottom_kl = ObjArrayKlass::cast(a->klass())->bottom_klass();
2365 ss.print("type mismatch: can not store %s to %s[%d]",
2366 v->klass()->external_name(),
2367 bottom_kl->is_typeArray_klass() ? type2name_tab[ArrayKlass::cast(bottom_kl)->element_type()] : bottom_kl->external_name(),
2368 index);
2369 for (int dims = ArrayKlass::cast(a->klass())->dimension(); dims > 1; --dims) {
2370 ss.print("[]");
2371 }
2372 THROW_MSG(vmSymbols::java_lang_ArrayStoreException(), ss.as_string());
2373 }
2374 } else {
2375 ResourceMark rm(THREAD);
2376 stringStream ss;
2377 ss.print("Index %d out of bounds for length %d", index, a->length());
2378 THROW_MSG(vmSymbols::java_lang_ArrayIndexOutOfBoundsException(), ss.as_string());
2379 }
2380 JNI_END
2381
2382
2383
2384 #define DEFINE_NEWSCALARARRAY(Return,Allocator,Result \
2385 ,EntryProbe,ReturnProbe) \
2386 \
2387 DT_RETURN_MARK_DECL(New##Result##Array, Return \
2388 , ReturnProbe); \
2389 \
2390 JNI_ENTRY(Return, \
2391 jni_New##Result##Array(JNIEnv *env, jsize len)) \
2392 EntryProbe; \
2393 Return ret = nullptr;\
2394 DT_RETURN_MARK(New##Result##Array, Return, (const Return&)ret);\
2395 \
2396 oop obj= oopFactory::Allocator(len, CHECK_NULL); \
2397 ret = (Return) JNIHandles::make_local(THREAD, obj); \
2398 return ret;\
2399 JNI_END
2400
2401 DEFINE_NEWSCALARARRAY(jbooleanArray, new_boolArray, Boolean,
2402 HOTSPOT_JNI_NEWBOOLEANARRAY_ENTRY(env, len),
2403 HOTSPOT_JNI_NEWBOOLEANARRAY_RETURN(_ret_ref))
2404 DEFINE_NEWSCALARARRAY(jbyteArray, new_byteArray, Byte,
2405 HOTSPOT_JNI_NEWBYTEARRAY_ENTRY(env, len),
2406 HOTSPOT_JNI_NEWBYTEARRAY_RETURN(_ret_ref))
2407 DEFINE_NEWSCALARARRAY(jshortArray, new_shortArray, Short,
2408 HOTSPOT_JNI_NEWSHORTARRAY_ENTRY(env, len),
2409 HOTSPOT_JNI_NEWSHORTARRAY_RETURN(_ret_ref))
2410 DEFINE_NEWSCALARARRAY(jcharArray, new_charArray, Char,
2411 HOTSPOT_JNI_NEWCHARARRAY_ENTRY(env, len),
2412 HOTSPOT_JNI_NEWCHARARRAY_RETURN(_ret_ref))
2413 DEFINE_NEWSCALARARRAY(jintArray, new_intArray, Int,
2414 HOTSPOT_JNI_NEWINTARRAY_ENTRY(env, len),
2415 HOTSPOT_JNI_NEWINTARRAY_RETURN(_ret_ref))
2416 DEFINE_NEWSCALARARRAY(jlongArray, new_longArray, Long,
2417 HOTSPOT_JNI_NEWLONGARRAY_ENTRY(env, len),
2418 HOTSPOT_JNI_NEWLONGARRAY_RETURN(_ret_ref))
2419 DEFINE_NEWSCALARARRAY(jfloatArray, new_floatArray, Float,
2420 HOTSPOT_JNI_NEWFLOATARRAY_ENTRY(env, len),
2421 HOTSPOT_JNI_NEWFLOATARRAY_RETURN(_ret_ref))
2422 DEFINE_NEWSCALARARRAY(jdoubleArray, new_doubleArray, Double,
2423 HOTSPOT_JNI_NEWDOUBLEARRAY_ENTRY(env, len),
2424 HOTSPOT_JNI_NEWDOUBLEARRAY_RETURN(_ret_ref))
2425
2426 // Return an address which will fault if the caller writes to it.
2427
2428 static char* get_bad_address() {
2429 static char* bad_address = nullptr;
2430 if (bad_address == nullptr) {
2431 size_t size = os::vm_allocation_granularity();
2432 bad_address = os::reserve_memory(size, mtInternal);
2433 if (bad_address != nullptr) {
2434 os::protect_memory(bad_address, size, os::MEM_PROT_READ,
2435 /*is_committed*/false);
2436 }
2437 }
2438 return bad_address;
2439 }
2440
2441
2442
2443 #define DEFINE_GETSCALARARRAYELEMENTS(ElementType,Result \
2444 , EntryProbe, ReturnProbe) \
2445 \
2446 JNI_ENTRY_NO_PRESERVE(ElementType*, \
2447 jni_Get##Result##ArrayElements(JNIEnv *env, ElementType##Array array, jboolean *isCopy)) \
2448 EntryProbe; \
2449 /* allocate an chunk of memory in c land */ \
2450 typeArrayOop a = typeArrayOop(JNIHandles::resolve_non_null(array)); \
2451 ElementType* result; \
2452 int len = a->length(); \
2453 if (len == 0) { \
2454 if (isCopy != nullptr) { \
2455 *isCopy = JNI_FALSE; \
2456 } \
2457 /* Empty array: legal but useless, can't return null. \
2458 * Return a pointer to something useless. \
2459 * Avoid asserts in typeArrayOop. */ \
2460 result = (ElementType*)get_bad_address(); \
2461 } else { \
2462 /* JNI Specification states return null on OOM */ \
2463 result = NEW_C_HEAP_ARRAY_RETURN_NULL(ElementType, len, mtInternal); \
2464 if (result != nullptr) { \
2465 /* copy the array to the c chunk */ \
2466 ArrayAccess<>::arraycopy_to_native(a, typeArrayOopDesc::element_offset<ElementType>(0), \
2467 result, len); \
2468 if (isCopy) { \
2469 *isCopy = JNI_TRUE; \
2470 } \
2471 } \
2472 } \
2473 ReturnProbe; \
2474 return result; \
2475 JNI_END
2476
2477 DEFINE_GETSCALARARRAYELEMENTS(jboolean, Boolean
2478 , HOTSPOT_JNI_GETBOOLEANARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy),
2479 HOTSPOT_JNI_GETBOOLEANARRAYELEMENTS_RETURN((uintptr_t*)result))
2480 DEFINE_GETSCALARARRAYELEMENTS(jbyte, Byte
2481 , HOTSPOT_JNI_GETBYTEARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy),
2482 HOTSPOT_JNI_GETBYTEARRAYELEMENTS_RETURN((char*)result))
2483 DEFINE_GETSCALARARRAYELEMENTS(jshort, Short
2484 , HOTSPOT_JNI_GETSHORTARRAYELEMENTS_ENTRY(env, (uint16_t*) array, (uintptr_t *) isCopy),
2485 HOTSPOT_JNI_GETSHORTARRAYELEMENTS_RETURN((uint16_t*)result))
2486 DEFINE_GETSCALARARRAYELEMENTS(jchar, Char
2487 , HOTSPOT_JNI_GETCHARARRAYELEMENTS_ENTRY(env, (uint16_t*) array, (uintptr_t *) isCopy),
2488 HOTSPOT_JNI_GETCHARARRAYELEMENTS_RETURN(result))
2489 DEFINE_GETSCALARARRAYELEMENTS(jint, Int
2490 , HOTSPOT_JNI_GETINTARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy),
2491 HOTSPOT_JNI_GETINTARRAYELEMENTS_RETURN((uint32_t*)result))
2492 DEFINE_GETSCALARARRAYELEMENTS(jlong, Long
2493 , HOTSPOT_JNI_GETLONGARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy),
2494 HOTSPOT_JNI_GETLONGARRAYELEMENTS_RETURN(((uintptr_t*)result)))
2495 // Float and double probes don't return value because dtrace doesn't currently support it
2496 DEFINE_GETSCALARARRAYELEMENTS(jfloat, Float
2497 , HOTSPOT_JNI_GETFLOATARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy),
2498 HOTSPOT_JNI_GETFLOATARRAYELEMENTS_RETURN(result))
2499 DEFINE_GETSCALARARRAYELEMENTS(jdouble, Double
2500 , HOTSPOT_JNI_GETDOUBLEARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy),
2501 HOTSPOT_JNI_GETDOUBLEARRAYELEMENTS_RETURN(result))
2502
2503
2504 #define DEFINE_RELEASESCALARARRAYELEMENTS(ElementType,Result \
2505 , EntryProbe, ReturnProbe) \
2506 \
2507 JNI_ENTRY_NO_PRESERVE(void, \
2508 jni_Release##Result##ArrayElements(JNIEnv *env, ElementType##Array array, \
2509 ElementType *buf, jint mode)) \
2510 EntryProbe; \
2511 typeArrayOop a = typeArrayOop(JNIHandles::resolve_non_null(array)); \
2512 int len = a->length(); \
2513 if (len != 0) { /* Empty array: nothing to free or copy. */ \
2514 if ((mode == 0) || (mode == JNI_COMMIT)) { \
2515 ArrayAccess<>::arraycopy_from_native(buf, a, typeArrayOopDesc::element_offset<ElementType>(0), len); \
2516 } \
2517 if ((mode == 0) || (mode == JNI_ABORT)) { \
2518 FreeHeap(buf); \
2519 } \
2520 } \
2521 ReturnProbe; \
2522 JNI_END
2523
2524 DEFINE_RELEASESCALARARRAYELEMENTS(jboolean, Boolean
2525 , HOTSPOT_JNI_RELEASEBOOLEANARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) buf, mode),
2526 HOTSPOT_JNI_RELEASEBOOLEANARRAYELEMENTS_RETURN())
2527 DEFINE_RELEASESCALARARRAYELEMENTS(jbyte, Byte
2528 , HOTSPOT_JNI_RELEASEBYTEARRAYELEMENTS_ENTRY(env, array, (char *) buf, mode),
2529 HOTSPOT_JNI_RELEASEBYTEARRAYELEMENTS_RETURN())
2530 DEFINE_RELEASESCALARARRAYELEMENTS(jshort, Short
2531 , HOTSPOT_JNI_RELEASESHORTARRAYELEMENTS_ENTRY(env, array, (uint16_t *) buf, mode),
2532 HOTSPOT_JNI_RELEASESHORTARRAYELEMENTS_RETURN())
2533 DEFINE_RELEASESCALARARRAYELEMENTS(jchar, Char
2534 , HOTSPOT_JNI_RELEASECHARARRAYELEMENTS_ENTRY(env, array, (uint16_t *) buf, mode),
2535 HOTSPOT_JNI_RELEASECHARARRAYELEMENTS_RETURN())
2536 DEFINE_RELEASESCALARARRAYELEMENTS(jint, Int
2537 , HOTSPOT_JNI_RELEASEINTARRAYELEMENTS_ENTRY(env, array, (uint32_t *) buf, mode),
2538 HOTSPOT_JNI_RELEASEINTARRAYELEMENTS_RETURN())
2539 DEFINE_RELEASESCALARARRAYELEMENTS(jlong, Long
2540 , HOTSPOT_JNI_RELEASELONGARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) buf, mode),
2541 HOTSPOT_JNI_RELEASELONGARRAYELEMENTS_RETURN())
2542 DEFINE_RELEASESCALARARRAYELEMENTS(jfloat, Float
2543 , HOTSPOT_JNI_RELEASEFLOATARRAYELEMENTS_ENTRY(env, array, (float *) buf, mode),
2544 HOTSPOT_JNI_RELEASEFLOATARRAYELEMENTS_RETURN())
2545 DEFINE_RELEASESCALARARRAYELEMENTS(jdouble, Double
2546 , HOTSPOT_JNI_RELEASEDOUBLEARRAYELEMENTS_ENTRY(env, array, (double *) buf, mode),
2547 HOTSPOT_JNI_RELEASEDOUBLEARRAYELEMENTS_RETURN())
2548
2549 static void check_bounds(jsize start, jsize copy_len, jsize array_len, TRAPS) {
2550 ResourceMark rm(THREAD);
2551 if (copy_len < 0) {
2552 stringStream ss;
2553 ss.print("Length %d is negative", copy_len);
2554 THROW_MSG(vmSymbols::java_lang_ArrayIndexOutOfBoundsException(), ss.as_string());
2555 } else if (start < 0 || (start > array_len - copy_len)) {
2556 stringStream ss;
2557 ss.print("Array region %d.." INT64_FORMAT " out of bounds for length %d",
2558 start, (int64_t)start+(int64_t)copy_len, array_len);
2559 THROW_MSG(vmSymbols::java_lang_ArrayIndexOutOfBoundsException(), ss.as_string());
2560 }
2561 }
2562
2563 #define DEFINE_GETSCALARARRAYREGION(ElementType,Result \
2564 , EntryProbe, ReturnProbe) \
2565 DT_VOID_RETURN_MARK_DECL(Get##Result##ArrayRegion \
2566 , ReturnProbe); \
2567 \
2568 JNI_ENTRY(void, \
2569 jni_Get##Result##ArrayRegion(JNIEnv *env, ElementType##Array array, jsize start, \
2570 jsize len, ElementType *buf)) \
2571 EntryProbe; \
2572 DT_VOID_RETURN_MARK(Get##Result##ArrayRegion); \
2573 typeArrayOop src = typeArrayOop(JNIHandles::resolve_non_null(array)); \
2574 check_bounds(start, len, src->length(), CHECK); \
2575 if (len > 0) { \
2576 ArrayAccess<>::arraycopy_to_native(src, typeArrayOopDesc::element_offset<ElementType>(start), buf, len); \
2577 } \
2578 JNI_END
2579
2580 DEFINE_GETSCALARARRAYREGION(jboolean,Boolean
2581 , HOTSPOT_JNI_GETBOOLEANARRAYREGION_ENTRY(env, array, start, len, (uintptr_t *) buf),
2582 HOTSPOT_JNI_GETBOOLEANARRAYREGION_RETURN());
2583 DEFINE_GETSCALARARRAYREGION(jbyte, Byte
2584 , HOTSPOT_JNI_GETBYTEARRAYREGION_ENTRY(env, array, start, len, (char *) buf),
2585 HOTSPOT_JNI_GETBYTEARRAYREGION_RETURN());
2586 DEFINE_GETSCALARARRAYREGION(jshort, Short
2587 , HOTSPOT_JNI_GETSHORTARRAYREGION_ENTRY(env, array, start, len, (uint16_t *) buf),
2588 HOTSPOT_JNI_GETSHORTARRAYREGION_RETURN());
2589 DEFINE_GETSCALARARRAYREGION(jchar, Char
2590 , HOTSPOT_JNI_GETCHARARRAYREGION_ENTRY(env, array, start, len, (uint16_t*) buf),
2591 HOTSPOT_JNI_GETCHARARRAYREGION_RETURN());
2592 DEFINE_GETSCALARARRAYREGION(jint, Int
2593 , HOTSPOT_JNI_GETINTARRAYREGION_ENTRY(env, array, start, len, (uint32_t*) buf),
2594 HOTSPOT_JNI_GETINTARRAYREGION_RETURN());
2595 DEFINE_GETSCALARARRAYREGION(jlong, Long
2596 , HOTSPOT_JNI_GETLONGARRAYREGION_ENTRY(env, array, start, len, (uintptr_t *) buf),
2597 HOTSPOT_JNI_GETLONGARRAYREGION_RETURN());
2598 DEFINE_GETSCALARARRAYREGION(jfloat, Float
2599 , HOTSPOT_JNI_GETFLOATARRAYREGION_ENTRY(env, array, start, len, (float *) buf),
2600 HOTSPOT_JNI_GETFLOATARRAYREGION_RETURN());
2601 DEFINE_GETSCALARARRAYREGION(jdouble, Double
2602 , HOTSPOT_JNI_GETDOUBLEARRAYREGION_ENTRY(env, array, start, len, (double *) buf),
2603 HOTSPOT_JNI_GETDOUBLEARRAYREGION_RETURN());
2604
2605
2606 #define DEFINE_SETSCALARARRAYREGION(ElementType,Result \
2607 , EntryProbe, ReturnProbe) \
2608 DT_VOID_RETURN_MARK_DECL(Set##Result##ArrayRegion \
2609 ,ReturnProbe); \
2610 \
2611 JNI_ENTRY(void, \
2612 jni_Set##Result##ArrayRegion(JNIEnv *env, ElementType##Array array, jsize start, \
2613 jsize len, const ElementType *buf)) \
2614 EntryProbe; \
2615 DT_VOID_RETURN_MARK(Set##Result##ArrayRegion); \
2616 typeArrayOop dst = typeArrayOop(JNIHandles::resolve_non_null(array)); \
2617 check_bounds(start, len, dst->length(), CHECK); \
2618 if (len > 0) { \
2619 ArrayAccess<>::arraycopy_from_native(buf, dst, typeArrayOopDesc::element_offset<ElementType>(start), len); \
2620 } \
2621 JNI_END
2622
2623 DEFINE_SETSCALARARRAYREGION(jboolean, Boolean
2624 , HOTSPOT_JNI_SETBOOLEANARRAYREGION_ENTRY(env, array, start, len, (uintptr_t *)buf),
2625 HOTSPOT_JNI_SETBOOLEANARRAYREGION_RETURN())
2626 DEFINE_SETSCALARARRAYREGION(jbyte, Byte
2627 , HOTSPOT_JNI_SETBYTEARRAYREGION_ENTRY(env, array, start, len, (char *) buf),
2628 HOTSPOT_JNI_SETBYTEARRAYREGION_RETURN())
2629 DEFINE_SETSCALARARRAYREGION(jshort, Short
2630 , HOTSPOT_JNI_SETSHORTARRAYREGION_ENTRY(env, array, start, len, (uint16_t *) buf),
2631 HOTSPOT_JNI_SETSHORTARRAYREGION_RETURN())
2632 DEFINE_SETSCALARARRAYREGION(jchar, Char
2633 , HOTSPOT_JNI_SETCHARARRAYREGION_ENTRY(env, array, start, len, (uint16_t *) buf),
2634 HOTSPOT_JNI_SETCHARARRAYREGION_RETURN())
2635 DEFINE_SETSCALARARRAYREGION(jint, Int
2636 , HOTSPOT_JNI_SETINTARRAYREGION_ENTRY(env, array, start, len, (uint32_t *) buf),
2637 HOTSPOT_JNI_SETINTARRAYREGION_RETURN())
2638 DEFINE_SETSCALARARRAYREGION(jlong, Long
2639 , HOTSPOT_JNI_SETLONGARRAYREGION_ENTRY(env, array, start, len, (uintptr_t *) buf),
2640 HOTSPOT_JNI_SETLONGARRAYREGION_RETURN())
2641 DEFINE_SETSCALARARRAYREGION(jfloat, Float
2642 , HOTSPOT_JNI_SETFLOATARRAYREGION_ENTRY(env, array, start, len, (float *) buf),
2643 HOTSPOT_JNI_SETFLOATARRAYREGION_RETURN())
2644 DEFINE_SETSCALARARRAYREGION(jdouble, Double
2645 , HOTSPOT_JNI_SETDOUBLEARRAYREGION_ENTRY(env, array, start, len, (double *) buf),
2646 HOTSPOT_JNI_SETDOUBLEARRAYREGION_RETURN())
2647
2648
2649 DT_RETURN_MARK_DECL(RegisterNatives, jint
2650 , HOTSPOT_JNI_REGISTERNATIVES_RETURN(_ret_ref));
2651
2652 JNI_ENTRY(jint, jni_RegisterNatives(JNIEnv *env, jclass clazz,
2653 const JNINativeMethod *methods,
2654 jint nMethods))
2655 HOTSPOT_JNI_REGISTERNATIVES_ENTRY(env, clazz, (void *) methods, nMethods);
2656 jint ret = 0;
2657 DT_RETURN_MARK(RegisterNatives, jint, (const jint&)ret);
2658
2659 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz));
2660
2661 // There are no restrictions on native code registering native methods,
2662 // which allows agents to redefine the bindings to native methods, however
2663 // we issue a warning if any code running outside of the boot/platform
2664 // loader is rebinding any native methods in classes loaded by the
2665 // boot/platform loader that are in named modules. That will catch changes
2666 // to platform classes while excluding classes added to the bootclasspath.
2667 bool do_warning = false;
2668
2669 // Only instanceKlasses can have native methods
2670 if (k->is_instance_klass()) {
2671 oop cl = k->class_loader();
2672 InstanceKlass* ik = InstanceKlass::cast(k);
2673 // Check for a platform class
2674 if ((cl == nullptr || SystemDictionary::is_platform_class_loader(cl)) &&
2675 ik->module()->is_named()) {
2676 Klass* caller = thread->security_get_caller_class(1);
2677 // If no caller class, or caller class has a different loader, then
2678 // issue a warning below.
2679 do_warning = (caller == nullptr) || caller->class_loader() != cl;
2680 }
2681 }
2682
2683
2684 for (int index = 0; index < nMethods; index++) {
2685 const char* meth_name = methods[index].name;
2686 const char* meth_sig = methods[index].signature;
2687 int meth_name_len = (int)strlen(meth_name);
2688
2689 // The class should have been loaded (we have an instance of the class
2690 // passed in) so the method and signature should already be in the symbol
2691 // table. If they're not there, the method doesn't exist.
2692 TempNewSymbol name = SymbolTable::probe(meth_name, meth_name_len);
2693 TempNewSymbol signature = SymbolTable::probe(meth_sig, (int)strlen(meth_sig));
2694
2695 if (name == nullptr || signature == nullptr) {
2696 ResourceMark rm(THREAD);
2697 stringStream st;
2698 st.print("Method %s.%s%s not found", k->external_name(), meth_name, meth_sig);
2699 // Must return negative value on failure
2700 THROW_MSG_(vmSymbols::java_lang_NoSuchMethodError(), st.as_string(), -1);
2701 }
2702
2703 if (do_warning) {
2704 ResourceMark rm(THREAD);
2705 log_warning(jni, resolve)("Re-registering of platform native method: %s.%s%s "
2706 "from code in a different classloader", k->external_name(), meth_name, meth_sig);
2707 }
2708
2709 bool res = Method::register_native(k, name, signature,
2710 (address) methods[index].fnPtr, THREAD);
2711 if (!res) {
2712 ret = -1;
2713 break;
2714 }
2715 }
2716 return ret;
2717 JNI_END
2718
2719
2720 JNI_ENTRY(jint, jni_UnregisterNatives(JNIEnv *env, jclass clazz))
2721 HOTSPOT_JNI_UNREGISTERNATIVES_ENTRY(env, clazz);
2722 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz));
2723 //%note jni_2
2724 if (k->is_instance_klass()) {
2725 for (int index = 0; index < InstanceKlass::cast(k)->methods()->length(); index++) {
2726 Method* m = InstanceKlass::cast(k)->methods()->at(index);
2727 if (m->is_native()) {
2728 m->clear_native_function();
2729 m->set_signature_handler(nullptr);
2730 }
2731 }
2732 }
2733 HOTSPOT_JNI_UNREGISTERNATIVES_RETURN(0);
2734 return 0;
2735 JNI_END
2736
2737 //
2738 // Monitor functions
2739 //
2740
2741 DT_RETURN_MARK_DECL(MonitorEnter, jint
2742 , HOTSPOT_JNI_MONITORENTER_RETURN(_ret_ref));
2743
2744 JNI_ENTRY(jint, jni_MonitorEnter(JNIEnv *env, jobject jobj))
2745 HOTSPOT_JNI_MONITORENTER_ENTRY(env, jobj);
2746 jint ret = JNI_ERR;
2747 DT_RETURN_MARK(MonitorEnter, jint, (const jint&)ret);
2748
2749 // If the object is null, we can't do anything with it
2750 if (jobj == nullptr) {
2751 THROW_(vmSymbols::java_lang_NullPointerException(), JNI_ERR);
2752 }
2753
2754 Handle obj(thread, JNIHandles::resolve_non_null(jobj));
2755 ObjectSynchronizer::jni_enter(obj, thread);
2756 return JNI_OK;
2757 JNI_END
2758
2759 DT_RETURN_MARK_DECL(MonitorExit, jint
2760 , HOTSPOT_JNI_MONITOREXIT_RETURN(_ret_ref));
2761
2762 JNI_ENTRY(jint, jni_MonitorExit(JNIEnv *env, jobject jobj))
2763 HOTSPOT_JNI_MONITOREXIT_ENTRY(env, jobj);
2764 jint ret = JNI_ERR;
2765 DT_RETURN_MARK(MonitorExit, jint, (const jint&)ret);
2766
2767 // Don't do anything with a null object
2768 if (jobj == nullptr) {
2769 THROW_(vmSymbols::java_lang_NullPointerException(), JNI_ERR);
2770 }
2771
2772 Handle obj(THREAD, JNIHandles::resolve_non_null(jobj));
2773 ObjectSynchronizer::jni_exit(obj(), CHECK_(JNI_ERR));
2774 return JNI_OK;
2775 JNI_END
2776
2777 //
2778 // Extensions
2779 //
2780
2781 DT_VOID_RETURN_MARK_DECL(GetStringRegion
2782 , HOTSPOT_JNI_GETSTRINGREGION_RETURN());
2783
2784 JNI_ENTRY(void, jni_GetStringRegion(JNIEnv *env, jstring string, jsize start, jsize len, jchar *buf))
2785 HOTSPOT_JNI_GETSTRINGREGION_ENTRY(env, string, start, len, buf);
2786 DT_VOID_RETURN_MARK(GetStringRegion);
2787 oop s = JNIHandles::resolve_non_null(string);
2788 typeArrayOop s_value = java_lang_String::value(s);
2789 int s_len = java_lang_String::length(s, s_value);
2790 if (start < 0 || len < 0 || start > s_len - len) {
2791 THROW(vmSymbols::java_lang_StringIndexOutOfBoundsException());
2792 } else {
2793 if (len > 0) {
2794 bool is_latin1 = java_lang_String::is_latin1(s);
2795 if (!is_latin1) {
2796 ArrayAccess<>::arraycopy_to_native(s_value, typeArrayOopDesc::element_offset<jchar>(start),
2797 buf, len);
2798 } else {
2799 for (int i = 0; i < len; i++) {
2800 buf[i] = ((jchar) s_value->byte_at(i + start)) & 0xff;
2801 }
2802 }
2803 }
2804 }
2805 JNI_END
2806
2807 DT_VOID_RETURN_MARK_DECL(GetStringUTFRegion
2808 , HOTSPOT_JNI_GETSTRINGUTFREGION_RETURN());
2809
2810 JNI_ENTRY(void, jni_GetStringUTFRegion(JNIEnv *env, jstring string, jsize start, jsize len, char *buf))
2811 HOTSPOT_JNI_GETSTRINGUTFREGION_ENTRY(env, string, start, len, buf);
2812 DT_VOID_RETURN_MARK(GetStringUTFRegion);
2813 oop s = JNIHandles::resolve_non_null(string);
2814 typeArrayOop s_value = java_lang_String::value(s);
2815 int s_len = java_lang_String::length(s, s_value);
2816 if (start < 0 || len < 0 || start > s_len - len) {
2817 THROW(vmSymbols::java_lang_StringIndexOutOfBoundsException());
2818 } else {
2819 //%note jni_7
2820 if (len > 0) {
2821 // Assume the buffer is large enough as the JNI spec. does not require user error checking
2822 java_lang_String::as_utf8_string(s, s_value, start, len, buf, INT_MAX);
2823 // as_utf8_string null-terminates the result string
2824 } else {
2825 // JDK null-terminates the buffer even in len is zero
2826 if (buf != nullptr) {
2827 buf[0] = 0;
2828 }
2829 }
2830 }
2831 JNI_END
2832
2833 JNI_ENTRY(void*, jni_GetPrimitiveArrayCritical(JNIEnv *env, jarray array, jboolean *isCopy))
2834 HOTSPOT_JNI_GETPRIMITIVEARRAYCRITICAL_ENTRY(env, array, (uintptr_t *) isCopy);
2835 Handle a(thread, JNIHandles::resolve_non_null(array));
2836 assert(a->is_typeArray(), "just checking");
2837
2838 // Pin object
2839 Universe::heap()->pin_object(thread, a());
2840
2841 BasicType type = TypeArrayKlass::cast(a->klass())->element_type();
2842 void* ret = arrayOop(a())->base(type);
2843 if (isCopy != nullptr) {
2844 *isCopy = JNI_FALSE;
2845 }
2846 HOTSPOT_JNI_GETPRIMITIVEARRAYCRITICAL_RETURN(ret);
2847 return ret;
2848 JNI_END
2849
2850
2851 JNI_ENTRY(void, jni_ReleasePrimitiveArrayCritical(JNIEnv *env, jarray array, void *carray, jint mode))
2852 HOTSPOT_JNI_RELEASEPRIMITIVEARRAYCRITICAL_ENTRY(env, array, carray, mode);
2853 // Unpin object
2854 Universe::heap()->unpin_object(thread, JNIHandles::resolve_non_null(array));
2855 HOTSPOT_JNI_RELEASEPRIMITIVEARRAYCRITICAL_RETURN();
2856 JNI_END
2857
2858
2859 JNI_ENTRY(const jchar*, jni_GetStringCritical(JNIEnv *env, jstring string, jboolean *isCopy))
2860 HOTSPOT_JNI_GETSTRINGCRITICAL_ENTRY(env, string, (uintptr_t *) isCopy);
2861 oop s = JNIHandles::resolve_non_null(string);
2862 jchar* ret;
2863 if (!java_lang_String::is_latin1(s)) {
2864 typeArrayHandle s_value(thread, java_lang_String::value(s));
2865
2866 // Pin value array
2867 Universe::heap()->pin_object(thread, s_value());
2868
2869 ret = (jchar*) s_value->base(T_CHAR);
2870 if (isCopy != nullptr) *isCopy = JNI_FALSE;
2871 } else {
2872 // Inflate latin1 encoded string to UTF16
2873 typeArrayOop s_value = java_lang_String::value(s);
2874 int s_len = java_lang_String::length(s, s_value);
2875 ret = NEW_C_HEAP_ARRAY_RETURN_NULL(jchar, s_len + 1, mtInternal); // add one for zero termination
2876 /* JNI Specification states return null on OOM */
2877 if (ret != nullptr) {
2878 for (int i = 0; i < s_len; i++) {
2879 ret[i] = ((jchar) s_value->byte_at(i)) & 0xff;
2880 }
2881 ret[s_len] = 0;
2882 }
2883 if (isCopy != nullptr) *isCopy = JNI_TRUE;
2884 }
2885 HOTSPOT_JNI_GETSTRINGCRITICAL_RETURN((uint16_t *) ret);
2886 return ret;
2887 JNI_END
2888
2889
2890 JNI_ENTRY(void, jni_ReleaseStringCritical(JNIEnv *env, jstring str, const jchar *chars))
2891 HOTSPOT_JNI_RELEASESTRINGCRITICAL_ENTRY(env, str, (uint16_t *) chars);
2892 oop s = JNIHandles::resolve_non_null(str);
2893 bool is_latin1 = java_lang_String::is_latin1(s);
2894
2895 if (is_latin1) {
2896 // For latin1 string, free jchar array allocated by earlier call to GetStringCritical.
2897 // This assumes that ReleaseStringCritical bookends GetStringCritical.
2898 FREE_C_HEAP_ARRAY(chars);
2899 } else {
2900 // StringDedup can have replaced the value array, so don't fetch the array from 's'.
2901 // Instead, we calculate the address based on the jchar array exposed with GetStringCritical.
2902 oop value = cast_to_oop((address)chars - arrayOopDesc::base_offset_in_bytes(T_CHAR));
2903
2904 // Unpin value array
2905 Universe::heap()->unpin_object(thread, value);
2906 }
2907 HOTSPOT_JNI_RELEASESTRINGCRITICAL_RETURN();
2908 JNI_END
2909
2910
2911 JNI_ENTRY(jweak, jni_NewWeakGlobalRef(JNIEnv *env, jobject ref))
2912 HOTSPOT_JNI_NEWWEAKGLOBALREF_ENTRY(env, ref);
2913 Handle ref_handle(thread, JNIHandles::resolve(ref));
2914 jweak ret = JNIHandles::make_weak_global(ref_handle, AllocFailStrategy::RETURN_NULL);
2915 if (ret == nullptr && ref_handle.not_null()) {
2916 THROW_OOP_(Universe::out_of_memory_error_c_heap(), nullptr);
2917 }
2918 HOTSPOT_JNI_NEWWEAKGLOBALREF_RETURN(ret);
2919 return ret;
2920 JNI_END
2921
2922 // Must be JNI_ENTRY (with HandleMark)
2923 JNI_ENTRY(void, jni_DeleteWeakGlobalRef(JNIEnv *env, jweak ref))
2924 HOTSPOT_JNI_DELETEWEAKGLOBALREF_ENTRY(env, ref);
2925 JNIHandles::destroy_weak_global(ref);
2926 HOTSPOT_JNI_DELETEWEAKGLOBALREF_RETURN();
2927 JNI_END
2928
2929
2930 JNI_ENTRY_NO_PRESERVE(jboolean, jni_ExceptionCheck(JNIEnv *env))
2931 HOTSPOT_JNI_EXCEPTIONCHECK_ENTRY(env);
2932 jni_check_async_exceptions(thread);
2933 jboolean ret = (thread->has_pending_exception()) ? JNI_TRUE : JNI_FALSE;
2934 HOTSPOT_JNI_EXCEPTIONCHECK_RETURN(ret);
2935 return ret;
2936 JNI_END
2937
2938
2939 // Initialization state for three routines below relating to
2940 // java.nio.DirectBuffers
2941 static int directBufferSupportInitializeStarted = 0;
2942 static volatile int directBufferSupportInitializeEnded = 0;
2943 static volatile int directBufferSupportInitializeFailed = 0;
2944 static jclass bufferClass = nullptr;
2945 static jclass directBufferClass = nullptr;
2946 static jclass directByteBufferClass = nullptr;
2947 static jmethodID directByteBufferConstructor = nullptr;
2948 static jfieldID directBufferAddressField = nullptr;
2949 static jfieldID bufferCapacityField = nullptr;
2950
2951 static jclass lookupOne(JNIEnv* env, const char* name, TRAPS) {
2952 Handle loader; // null (bootstrap) loader
2953
2954 TempNewSymbol sym = SymbolTable::new_symbol(name);
2955 jclass result = find_class_from_class_loader(env, sym, true, loader, true, CHECK_NULL);
2956
2957 if (log_is_enabled(Debug, class, resolve) && result != nullptr) {
2958 trace_class_resolution(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(result)));
2959 }
2960 return result;
2961 }
2962
2963 // These lookups are done with the null (bootstrap) ClassLoader to
2964 // circumvent any security checks that would be done by jni_FindClass.
2965 JNI_ENTRY(bool, lookupDirectBufferClasses(JNIEnv* env))
2966 {
2967 if ((bufferClass = lookupOne(env, "java/nio/Buffer", thread)) == nullptr) { return false; }
2968 if ((directBufferClass = lookupOne(env, "sun/nio/ch/DirectBuffer", thread)) == nullptr) { return false; }
2969 if ((directByteBufferClass = lookupOne(env, "java/nio/DirectByteBuffer", thread)) == nullptr) { return false; }
2970 return true;
2971 }
2972 JNI_END
2973
2974
2975 static bool initializeDirectBufferSupport(JNIEnv* env, JavaThread* thread) {
2976 if (directBufferSupportInitializeFailed) {
2977 return false;
2978 }
2979
2980 if (AtomicAccess::cmpxchg(&directBufferSupportInitializeStarted, 0, 1) == 0) {
2981 if (!lookupDirectBufferClasses(env)) {
2982 directBufferSupportInitializeFailed = 1;
2983 return false;
2984 }
2985
2986 // Make global references for these
2987 bufferClass = (jclass) env->NewGlobalRef(bufferClass);
2988 directBufferClass = (jclass) env->NewGlobalRef(directBufferClass);
2989 directByteBufferClass = (jclass) env->NewGlobalRef(directByteBufferClass);
2990
2991 // Global refs will be null if out-of-memory (no exception is pending)
2992 if (bufferClass == nullptr || directBufferClass == nullptr || directByteBufferClass == nullptr) {
2993 directBufferSupportInitializeFailed = 1;
2994 return false;
2995 }
2996
2997 // Get needed field and method IDs
2998 directByteBufferConstructor = env->GetMethodID(directByteBufferClass, "<init>", "(JJ)V");
2999 if (env->ExceptionCheck()) {
3000 env->ExceptionClear();
3001 directBufferSupportInitializeFailed = 1;
3002 return false;
3003 }
3004 directBufferAddressField = env->GetFieldID(bufferClass, "address", "J");
3005 if (env->ExceptionCheck()) {
3006 env->ExceptionClear();
3007 directBufferSupportInitializeFailed = 1;
3008 return false;
3009 }
3010 bufferCapacityField = env->GetFieldID(bufferClass, "capacity", "I");
3011 if (env->ExceptionCheck()) {
3012 env->ExceptionClear();
3013 directBufferSupportInitializeFailed = 1;
3014 return false;
3015 }
3016
3017 if ((directByteBufferConstructor == nullptr) ||
3018 (directBufferAddressField == nullptr) ||
3019 (bufferCapacityField == nullptr)) {
3020 directBufferSupportInitializeFailed = 1;
3021 return false;
3022 }
3023
3024 directBufferSupportInitializeEnded = 1;
3025 } else {
3026 while (!directBufferSupportInitializeEnded && !directBufferSupportInitializeFailed) {
3027 os::naked_yield();
3028 }
3029 }
3030
3031 return !directBufferSupportInitializeFailed;
3032 }
3033
3034 extern "C" jobject JNICALL jni_NewDirectByteBuffer(JNIEnv *env, void* address, jlong capacity)
3035 {
3036 // thread_from_jni_environment() will block if VM is gone.
3037 JavaThread* thread = JavaThread::thread_from_jni_environment(env);
3038
3039 HOTSPOT_JNI_NEWDIRECTBYTEBUFFER_ENTRY(env, address, capacity);
3040
3041 if (!directBufferSupportInitializeEnded) {
3042 if (!initializeDirectBufferSupport(env, thread)) {
3043 HOTSPOT_JNI_NEWDIRECTBYTEBUFFER_RETURN(nullptr);
3044 return nullptr;
3045 }
3046 }
3047
3048 // Being paranoid about accidental sign extension on address
3049 jlong addr = (jlong) ((uintptr_t) address);
3050 jobject ret = env->NewObject(directByteBufferClass, directByteBufferConstructor, addr, capacity);
3051 HOTSPOT_JNI_NEWDIRECTBYTEBUFFER_RETURN(ret);
3052 return ret;
3053 }
3054
3055 DT_RETURN_MARK_DECL(GetDirectBufferAddress, void*
3056 , HOTSPOT_JNI_GETDIRECTBUFFERADDRESS_RETURN((void*) _ret_ref));
3057
3058 extern "C" void* JNICALL jni_GetDirectBufferAddress(JNIEnv *env, jobject buf)
3059 {
3060 // thread_from_jni_environment() will block if VM is gone.
3061 JavaThread* thread = JavaThread::thread_from_jni_environment(env);
3062
3063 HOTSPOT_JNI_GETDIRECTBUFFERADDRESS_ENTRY(env, buf);
3064 void* ret = nullptr;
3065 DT_RETURN_MARK(GetDirectBufferAddress, void*, (const void*&)ret);
3066
3067 if (!directBufferSupportInitializeEnded) {
3068 if (!initializeDirectBufferSupport(env, thread)) {
3069 return nullptr;
3070 }
3071 }
3072
3073 if ((buf != nullptr) && (!env->IsInstanceOf(buf, directBufferClass))) {
3074 return nullptr;
3075 }
3076
3077 ret = (void*)(intptr_t)env->GetLongField(buf, directBufferAddressField);
3078 return ret;
3079 }
3080
3081 DT_RETURN_MARK_DECL(GetDirectBufferCapacity, jlong
3082 , HOTSPOT_JNI_GETDIRECTBUFFERCAPACITY_RETURN(_ret_ref));
3083
3084 extern "C" jlong JNICALL jni_GetDirectBufferCapacity(JNIEnv *env, jobject buf)
3085 {
3086 // thread_from_jni_environment() will block if VM is gone.
3087 JavaThread* thread = JavaThread::thread_from_jni_environment(env);
3088
3089 HOTSPOT_JNI_GETDIRECTBUFFERCAPACITY_ENTRY(env, buf);
3090 jlong ret = -1;
3091 DT_RETURN_MARK(GetDirectBufferCapacity, jlong, (const jlong&)ret);
3092
3093 if (!directBufferSupportInitializeEnded) {
3094 if (!initializeDirectBufferSupport(env, thread)) {
3095 ret = 0;
3096 return ret;
3097 }
3098 }
3099
3100 if (buf == nullptr) {
3101 return -1;
3102 }
3103
3104 if (!env->IsInstanceOf(buf, directBufferClass)) {
3105 return -1;
3106 }
3107
3108 // NOTE that capacity is currently an int in the implementation
3109 ret = env->GetIntField(buf, bufferCapacityField);
3110 return ret;
3111 }
3112
3113
3114 JNI_LEAF(jint, jni_GetVersion(JNIEnv *env))
3115 HOTSPOT_JNI_GETVERSION_ENTRY(env);
3116 HOTSPOT_JNI_GETVERSION_RETURN(CurrentVersion);
3117 return CurrentVersion;
3118 JNI_END
3119
3120 extern struct JavaVM_ main_vm;
3121
3122 JNI_LEAF(jint, jni_GetJavaVM(JNIEnv *env, JavaVM **vm))
3123 HOTSPOT_JNI_GETJAVAVM_ENTRY(env, (void **) vm);
3124 *vm = (JavaVM *)(&main_vm);
3125 HOTSPOT_JNI_GETJAVAVM_RETURN(JNI_OK);
3126 return JNI_OK;
3127 JNI_END
3128
3129
3130 JNI_ENTRY(jobject, jni_GetModule(JNIEnv* env, jclass clazz))
3131 HOTSPOT_JNI_GETMODULE_ENTRY(env, clazz);
3132 jobject ret = Modules::get_module(clazz, THREAD);
3133 HOTSPOT_JNI_GETMODULE_RETURN(ret);
3134 return ret;
3135 JNI_END
3136
3137 JNI_ENTRY(jboolean, jni_IsVirtualThread(JNIEnv* env, jobject obj))
3138 HOTSPOT_JNI_ISVIRTUALTHREAD_ENTRY(env, obj);
3139 jboolean ret = JNI_FALSE;
3140 oop thread_obj = JNIHandles::resolve_external_guard(obj);
3141 if (thread_obj != nullptr && thread_obj->is_a(vmClasses::BaseVirtualThread_klass())) {
3142 ret = JNI_TRUE;
3143 }
3144 HOTSPOT_JNI_ISVIRTUALTHREAD_RETURN(ret);
3145 return ret;
3146 JNI_END
3147
3148
3149 // Structure containing all jni functions
3150 struct JNINativeInterface_ jni_NativeInterface = {
3151 nullptr,
3152 nullptr,
3153 nullptr,
3154
3155 nullptr,
3156
3157 jni_GetVersion,
3158
3159 jni_DefineClass,
3160 jni_FindClass,
3161
3162 jni_FromReflectedMethod,
3163 jni_FromReflectedField,
3164
3165 jni_ToReflectedMethod,
3166
3167 jni_GetSuperclass,
3168 jni_IsAssignableFrom,
3169
3170 jni_ToReflectedField,
3171
3172 jni_Throw,
3173 jni_ThrowNew,
3174 jni_ExceptionOccurred,
3175 jni_ExceptionDescribe,
3176 jni_ExceptionClear,
3177 jni_FatalError,
3178
3179 jni_PushLocalFrame,
3180 jni_PopLocalFrame,
3181
3182 jni_NewGlobalRef,
3183 jni_DeleteGlobalRef,
3184 jni_DeleteLocalRef,
3185 jni_IsSameObject,
3186
3187 jni_NewLocalRef,
3188 jni_EnsureLocalCapacity,
3189
3190 jni_AllocObject,
3191 jni_NewObject,
3192 jni_NewObjectV,
3193 jni_NewObjectA,
3194
3195 jni_GetObjectClass,
3196 jni_IsInstanceOf,
3197
3198 jni_GetMethodID,
3199
3200 jni_CallObjectMethod,
3201 jni_CallObjectMethodV,
3202 jni_CallObjectMethodA,
3203 jni_CallBooleanMethod,
3204 jni_CallBooleanMethodV,
3205 jni_CallBooleanMethodA,
3206 jni_CallByteMethod,
3207 jni_CallByteMethodV,
3208 jni_CallByteMethodA,
3209 jni_CallCharMethod,
3210 jni_CallCharMethodV,
3211 jni_CallCharMethodA,
3212 jni_CallShortMethod,
3213 jni_CallShortMethodV,
3214 jni_CallShortMethodA,
3215 jni_CallIntMethod,
3216 jni_CallIntMethodV,
3217 jni_CallIntMethodA,
3218 jni_CallLongMethod,
3219 jni_CallLongMethodV,
3220 jni_CallLongMethodA,
3221 jni_CallFloatMethod,
3222 jni_CallFloatMethodV,
3223 jni_CallFloatMethodA,
3224 jni_CallDoubleMethod,
3225 jni_CallDoubleMethodV,
3226 jni_CallDoubleMethodA,
3227 jni_CallVoidMethod,
3228 jni_CallVoidMethodV,
3229 jni_CallVoidMethodA,
3230
3231 jni_CallNonvirtualObjectMethod,
3232 jni_CallNonvirtualObjectMethodV,
3233 jni_CallNonvirtualObjectMethodA,
3234 jni_CallNonvirtualBooleanMethod,
3235 jni_CallNonvirtualBooleanMethodV,
3236 jni_CallNonvirtualBooleanMethodA,
3237 jni_CallNonvirtualByteMethod,
3238 jni_CallNonvirtualByteMethodV,
3239 jni_CallNonvirtualByteMethodA,
3240 jni_CallNonvirtualCharMethod,
3241 jni_CallNonvirtualCharMethodV,
3242 jni_CallNonvirtualCharMethodA,
3243 jni_CallNonvirtualShortMethod,
3244 jni_CallNonvirtualShortMethodV,
3245 jni_CallNonvirtualShortMethodA,
3246 jni_CallNonvirtualIntMethod,
3247 jni_CallNonvirtualIntMethodV,
3248 jni_CallNonvirtualIntMethodA,
3249 jni_CallNonvirtualLongMethod,
3250 jni_CallNonvirtualLongMethodV,
3251 jni_CallNonvirtualLongMethodA,
3252 jni_CallNonvirtualFloatMethod,
3253 jni_CallNonvirtualFloatMethodV,
3254 jni_CallNonvirtualFloatMethodA,
3255 jni_CallNonvirtualDoubleMethod,
3256 jni_CallNonvirtualDoubleMethodV,
3257 jni_CallNonvirtualDoubleMethodA,
3258 jni_CallNonvirtualVoidMethod,
3259 jni_CallNonvirtualVoidMethodV,
3260 jni_CallNonvirtualVoidMethodA,
3261
3262 jni_GetFieldID,
3263
3264 jni_GetObjectField,
3265 jni_GetBooleanField,
3266 jni_GetByteField,
3267 jni_GetCharField,
3268 jni_GetShortField,
3269 jni_GetIntField,
3270 jni_GetLongField,
3271 jni_GetFloatField,
3272 jni_GetDoubleField,
3273
3274 jni_SetObjectField,
3275 jni_SetBooleanField,
3276 jni_SetByteField,
3277 jni_SetCharField,
3278 jni_SetShortField,
3279 jni_SetIntField,
3280 jni_SetLongField,
3281 jni_SetFloatField,
3282 jni_SetDoubleField,
3283
3284 jni_GetStaticMethodID,
3285
3286 jni_CallStaticObjectMethod,
3287 jni_CallStaticObjectMethodV,
3288 jni_CallStaticObjectMethodA,
3289 jni_CallStaticBooleanMethod,
3290 jni_CallStaticBooleanMethodV,
3291 jni_CallStaticBooleanMethodA,
3292 jni_CallStaticByteMethod,
3293 jni_CallStaticByteMethodV,
3294 jni_CallStaticByteMethodA,
3295 jni_CallStaticCharMethod,
3296 jni_CallStaticCharMethodV,
3297 jni_CallStaticCharMethodA,
3298 jni_CallStaticShortMethod,
3299 jni_CallStaticShortMethodV,
3300 jni_CallStaticShortMethodA,
3301 jni_CallStaticIntMethod,
3302 jni_CallStaticIntMethodV,
3303 jni_CallStaticIntMethodA,
3304 jni_CallStaticLongMethod,
3305 jni_CallStaticLongMethodV,
3306 jni_CallStaticLongMethodA,
3307 jni_CallStaticFloatMethod,
3308 jni_CallStaticFloatMethodV,
3309 jni_CallStaticFloatMethodA,
3310 jni_CallStaticDoubleMethod,
3311 jni_CallStaticDoubleMethodV,
3312 jni_CallStaticDoubleMethodA,
3313 jni_CallStaticVoidMethod,
3314 jni_CallStaticVoidMethodV,
3315 jni_CallStaticVoidMethodA,
3316
3317 jni_GetStaticFieldID,
3318
3319 jni_GetStaticObjectField,
3320 jni_GetStaticBooleanField,
3321 jni_GetStaticByteField,
3322 jni_GetStaticCharField,
3323 jni_GetStaticShortField,
3324 jni_GetStaticIntField,
3325 jni_GetStaticLongField,
3326 jni_GetStaticFloatField,
3327 jni_GetStaticDoubleField,
3328
3329 jni_SetStaticObjectField,
3330 jni_SetStaticBooleanField,
3331 jni_SetStaticByteField,
3332 jni_SetStaticCharField,
3333 jni_SetStaticShortField,
3334 jni_SetStaticIntField,
3335 jni_SetStaticLongField,
3336 jni_SetStaticFloatField,
3337 jni_SetStaticDoubleField,
3338
3339 jni_NewString,
3340 jni_GetStringLength,
3341 jni_GetStringChars,
3342 jni_ReleaseStringChars,
3343
3344 jni_NewStringUTF,
3345 jni_GetStringUTFLength,
3346 jni_GetStringUTFChars,
3347 jni_ReleaseStringUTFChars,
3348
3349 jni_GetArrayLength,
3350
3351 jni_NewObjectArray,
3352 jni_GetObjectArrayElement,
3353 jni_SetObjectArrayElement,
3354
3355 jni_NewBooleanArray,
3356 jni_NewByteArray,
3357 jni_NewCharArray,
3358 jni_NewShortArray,
3359 jni_NewIntArray,
3360 jni_NewLongArray,
3361 jni_NewFloatArray,
3362 jni_NewDoubleArray,
3363
3364 jni_GetBooleanArrayElements,
3365 jni_GetByteArrayElements,
3366 jni_GetCharArrayElements,
3367 jni_GetShortArrayElements,
3368 jni_GetIntArrayElements,
3369 jni_GetLongArrayElements,
3370 jni_GetFloatArrayElements,
3371 jni_GetDoubleArrayElements,
3372
3373 jni_ReleaseBooleanArrayElements,
3374 jni_ReleaseByteArrayElements,
3375 jni_ReleaseCharArrayElements,
3376 jni_ReleaseShortArrayElements,
3377 jni_ReleaseIntArrayElements,
3378 jni_ReleaseLongArrayElements,
3379 jni_ReleaseFloatArrayElements,
3380 jni_ReleaseDoubleArrayElements,
3381
3382 jni_GetBooleanArrayRegion,
3383 jni_GetByteArrayRegion,
3384 jni_GetCharArrayRegion,
3385 jni_GetShortArrayRegion,
3386 jni_GetIntArrayRegion,
3387 jni_GetLongArrayRegion,
3388 jni_GetFloatArrayRegion,
3389 jni_GetDoubleArrayRegion,
3390
3391 jni_SetBooleanArrayRegion,
3392 jni_SetByteArrayRegion,
3393 jni_SetCharArrayRegion,
3394 jni_SetShortArrayRegion,
3395 jni_SetIntArrayRegion,
3396 jni_SetLongArrayRegion,
3397 jni_SetFloatArrayRegion,
3398 jni_SetDoubleArrayRegion,
3399
3400 jni_RegisterNatives,
3401 jni_UnregisterNatives,
3402
3403 jni_MonitorEnter,
3404 jni_MonitorExit,
3405
3406 jni_GetJavaVM,
3407
3408 jni_GetStringRegion,
3409 jni_GetStringUTFRegion,
3410
3411 jni_GetPrimitiveArrayCritical,
3412 jni_ReleasePrimitiveArrayCritical,
3413
3414 jni_GetStringCritical,
3415 jni_ReleaseStringCritical,
3416
3417 jni_NewWeakGlobalRef,
3418 jni_DeleteWeakGlobalRef,
3419
3420 jni_ExceptionCheck,
3421
3422 jni_NewDirectByteBuffer,
3423 jni_GetDirectBufferAddress,
3424 jni_GetDirectBufferCapacity,
3425
3426 // New 1_6 features
3427
3428 jni_GetObjectRefType,
3429
3430 // Module features
3431
3432 jni_GetModule,
3433
3434 // Virtual threads
3435
3436 jni_IsVirtualThread,
3437
3438 // Large UTF8 support
3439
3440 jni_GetStringUTFLengthAsLong
3441 };
3442
3443
3444 // For jvmti use to modify jni function table.
3445 // Java threads in native contiues to run until it is transitioned
3446 // to VM at safepoint. Before the transition or before it is blocked
3447 // for safepoint it may access jni function table. VM could crash if
3448 // any java thread access the jni function table in the middle of memcpy.
3449 // To avoid this each function pointers are copied automically.
3450 void copy_jni_function_table(const struct JNINativeInterface_ *new_jni_NativeInterface) {
3451 assert(SafepointSynchronize::is_at_safepoint(), "must be at safepoint");
3452 intptr_t *a = (intptr_t *) jni_functions();
3453 intptr_t *b = (intptr_t *) new_jni_NativeInterface;
3454 for (uint i=0; i < sizeof(struct JNINativeInterface_)/sizeof(void *); i++) {
3455 AtomicAccess::store(a++, *b++);
3456 }
3457 }
3458
3459 void quicken_jni_functions() {
3460 // Replace Get<Primitive>Field with fast versions
3461 if (UseFastJNIAccessors && !VerifyJNIFields && !CheckJNICalls) {
3462 address func;
3463 func = JNI_FastGetField::generate_fast_get_boolean_field();
3464 if (func != (address)-1) {
3465 jni_NativeInterface.GetBooleanField = (GetBooleanField_t)func;
3466 }
3467 func = JNI_FastGetField::generate_fast_get_byte_field();
3468 if (func != (address)-1) {
3469 jni_NativeInterface.GetByteField = (GetByteField_t)func;
3470 }
3471 func = JNI_FastGetField::generate_fast_get_char_field();
3472 if (func != (address)-1) {
3473 jni_NativeInterface.GetCharField = (GetCharField_t)func;
3474 }
3475 func = JNI_FastGetField::generate_fast_get_short_field();
3476 if (func != (address)-1) {
3477 jni_NativeInterface.GetShortField = (GetShortField_t)func;
3478 }
3479 func = JNI_FastGetField::generate_fast_get_int_field();
3480 if (func != (address)-1) {
3481 jni_NativeInterface.GetIntField = (GetIntField_t)func;
3482 }
3483 func = JNI_FastGetField::generate_fast_get_long_field();
3484 if (func != (address)-1) {
3485 jni_NativeInterface.GetLongField = (GetLongField_t)func;
3486 }
3487 func = JNI_FastGetField::generate_fast_get_float_field();
3488 if (func != (address)-1) {
3489 jni_NativeInterface.GetFloatField = (GetFloatField_t)func;
3490 }
3491 func = JNI_FastGetField::generate_fast_get_double_field();
3492 if (func != (address)-1) {
3493 jni_NativeInterface.GetDoubleField = (GetDoubleField_t)func;
3494 }
3495 }
3496 }
3497
3498 // Returns the function structure
3499 struct JNINativeInterface_* jni_functions() {
3500 #if INCLUDE_JNI_CHECK
3501 if (CheckJNICalls) return jni_functions_check();
3502 #endif // INCLUDE_JNI_CHECK
3503 return &jni_NativeInterface;
3504 }
3505
3506 // Returns the function structure
3507 struct JNINativeInterface_* jni_functions_nocheck() {
3508 return &jni_NativeInterface;
3509 }
3510
3511
3512 // Invocation API
3513
3514
3515 // Forward declaration
3516 extern const struct JNIInvokeInterface_ jni_InvokeInterface;
3517
3518 // Global invocation API vars
3519 enum VM_Creation_State {
3520 NOT_CREATED = 0,
3521 IN_PROGRESS, // Most JNI operations are permitted during this phase to
3522 // allow for initialization actions by libraries and agents.
3523 COMPLETE
3524 };
3525
3526 volatile VM_Creation_State vm_created = NOT_CREATED;
3527
3528 bool is_vm_created() {
3529 return AtomicAccess::load(&vm_created) == COMPLETE;
3530 }
3531
3532 // Indicate whether it is safe to recreate VM. Recreation is only
3533 // possible after a failed initial creation attempt in some cases.
3534 volatile int safe_to_recreate_vm = 1;
3535 struct JavaVM_ main_vm = {&jni_InvokeInterface};
3536
3537
3538 #define JAVASTACKSIZE (400 * 1024) /* Default size of a thread java stack */
3539 enum { VERIFY_NONE, VERIFY_REMOTE, VERIFY_ALL };
3540
3541 DT_RETURN_MARK_DECL(GetDefaultJavaVMInitArgs, jint
3542 , HOTSPOT_JNI_GETDEFAULTJAVAVMINITARGS_RETURN(_ret_ref));
3543
3544 _JNI_IMPORT_OR_EXPORT_ jint JNICALL JNI_GetDefaultJavaVMInitArgs(void *args_) {
3545 HOTSPOT_JNI_GETDEFAULTJAVAVMINITARGS_ENTRY(args_);
3546 JDK1_1InitArgs *args = (JDK1_1InitArgs *)args_;
3547 jint ret = JNI_ERR;
3548 DT_RETURN_MARK(GetDefaultJavaVMInitArgs, jint, (const jint&)ret);
3549
3550 if (Threads::is_supported_jni_version(args->version)) {
3551 ret = JNI_OK;
3552 }
3553 // 1.1 style no longer supported in hotspot.
3554 // According the JNI spec, we should update args->version on return.
3555 // We also use the structure to communicate with launcher about default
3556 // stack size.
3557 if (args->version == JNI_VERSION_1_1) {
3558 args->version = JNI_VERSION_1_2;
3559 // javaStackSize is int in arguments structure
3560 assert(jlong(ThreadStackSize) * K < INT_MAX, "integer overflow");
3561 args->javaStackSize = (jint)(ThreadStackSize * K);
3562 }
3563 return ret;
3564 }
3565
3566 DT_RETURN_MARK_DECL(CreateJavaVM, jint
3567 , HOTSPOT_JNI_CREATEJAVAVM_RETURN(_ret_ref));
3568
3569 static jint JNI_CreateJavaVM_inner(JavaVM **vm, void **penv, void *args) {
3570 HOTSPOT_JNI_CREATEJAVAVM_ENTRY((void **) vm, penv, args);
3571
3572 jint result = JNI_ERR;
3573 DT_RETURN_MARK(CreateJavaVM, jint, (const jint&)result);
3574
3575 // We're about to use AtomicAccess::xchg for synchronization. Some Zero
3576 // platforms use the GCC builtin __sync_lock_test_and_set for this,
3577 // but __sync_lock_test_and_set is not guaranteed to do what we want
3578 // on all architectures. So we check it works before relying on it.
3579 #if defined(ZERO) && defined(ASSERT)
3580 {
3581 jint a = 0xcafebabe;
3582 jint b = AtomicAccess::xchg(&a, (jint) 0xdeadbeef);
3583 void *c = &a;
3584 void *d = AtomicAccess::xchg(&c, &b);
3585 assert(a == (jint) 0xdeadbeef && b == (jint) 0xcafebabe, "AtomicAccess::xchg() works");
3586 assert(c == &b && d == &a, "AtomicAccess::xchg() works");
3587 }
3588 #endif // ZERO && ASSERT
3589
3590 // At the moment it's only possible to have one Java VM,
3591 // since some of the runtime state is in global variables.
3592
3593 // We cannot use our mutex locks here, since they only work on
3594 // Threads. We do an atomic compare and exchange to ensure only
3595 // one thread can call this method at a time
3596
3597 // We use AtomicAccess::xchg rather than AtomicAccess::add/dec since on some platforms
3598 // the add/dec implementations are dependent on whether we are running
3599 // on a multiprocessor AtomicAccess::xchg does not have this problem.
3600 if (AtomicAccess::xchg(&vm_created, IN_PROGRESS) != NOT_CREATED) {
3601 return JNI_EEXIST; // already created, or create attempt in progress
3602 }
3603
3604 // If a previous creation attempt failed but can be retried safely,
3605 // then safe_to_recreate_vm will have been reset to 1 after being
3606 // cleared here. If a previous creation attempt succeeded and we then
3607 // destroyed that VM, we will be prevented from trying to recreate
3608 // the VM in the same process, as the value will still be 0.
3609 if (AtomicAccess::xchg(&safe_to_recreate_vm, 0) == 0) {
3610 return JNI_ERR;
3611 }
3612
3613 /**
3614 * Certain errors during initialization are recoverable and do not
3615 * prevent this method from being called again at a later time
3616 * (perhaps with different arguments). However, at a certain
3617 * point during initialization if an error occurs we cannot allow
3618 * this function to be called again (or it will crash). In those
3619 * situations, the 'canTryAgain' flag is set to false, which atomically
3620 * sets safe_to_recreate_vm to 1, such that any new call to
3621 * JNI_CreateJavaVM will immediately fail using the above logic.
3622 */
3623 bool can_try_again = true;
3624
3625 result = Threads::create_vm((JavaVMInitArgs*) args, &can_try_again);
3626 if (result == JNI_OK) {
3627 JavaThread *thread = JavaThread::current();
3628 assert(!thread->has_pending_exception(), "should have returned not OK");
3629 // thread is thread_in_vm here
3630 *vm = (JavaVM *)(&main_vm);
3631 *(JNIEnv**)penv = thread->jni_environment();
3632 // mark creation complete for other JNI ops
3633 AtomicAccess::release_store(&vm_created, COMPLETE);
3634
3635 #if INCLUDE_JVMCI
3636 if (EnableJVMCI) {
3637 if (UseJVMCICompiler) {
3638 // JVMCI is initialized on a CompilerThread
3639 if (BootstrapJVMCI) {
3640 JavaThread* THREAD = thread; // For exception macros.
3641 JVMCICompiler* compiler = JVMCICompiler::instance(true, CATCH);
3642 compiler->bootstrap(THREAD);
3643 if (HAS_PENDING_EXCEPTION) {
3644 HandleMark hm(THREAD);
3645 vm_exit_during_initialization(Handle(THREAD, PENDING_EXCEPTION));
3646 }
3647 }
3648 }
3649 }
3650 #endif
3651
3652 // Notify JVMTI
3653 if (JvmtiExport::should_post_thread_life()) {
3654 JvmtiExport::post_thread_start(thread);
3655 }
3656
3657 JFR_ONLY(Jfr::on_thread_start(thread);)
3658
3659 if (ReplayCompiles) ciReplay::replay(thread);
3660
3661 #ifdef ASSERT
3662 // Some platforms (like Win*) need a wrapper around these test
3663 // functions in order to properly handle error conditions.
3664 if (ErrorHandlerTest != 0) {
3665 VMError::controlled_crash(ErrorHandlerTest);
3666 }
3667 #endif
3668
3669 // Since this is not a JVM_ENTRY we have to set the thread state manually before leaving.
3670 ThreadStateTransition::transition_from_vm(thread, _thread_in_native);
3671 MACOS_AARCH64_ONLY(thread->enable_wx(WXExec));
3672 } else {
3673 // If create_vm exits because of a pending exception, exit with that
3674 // exception. In the future when we figure out how to reclaim memory,
3675 // we may be able to exit with JNI_ERR and allow the calling application
3676 // to continue.
3677 if (Universe::is_fully_initialized()) {
3678 // otherwise no pending exception possible - VM will already have aborted
3679 Thread* current = Thread::current_or_null();
3680 if (current != nullptr) {
3681 JavaThread* THREAD = JavaThread::cast(current); // For exception macros.
3682 assert(HAS_PENDING_EXCEPTION, "must be - else no current thread exists");
3683 HandleMark hm(THREAD);
3684 vm_exit_during_initialization(Handle(THREAD, PENDING_EXCEPTION));
3685 }
3686 }
3687
3688 if (can_try_again) {
3689 // reset safe_to_recreate_vm to 1 so that retrial would be possible
3690 safe_to_recreate_vm = 1;
3691 }
3692
3693 // Creation failed. We must reset vm_created
3694 *vm = nullptr;
3695 *(JNIEnv**)penv = nullptr;
3696 // reset vm_created last to avoid race condition. Use OrderAccess to
3697 // control both compiler and architectural-based reordering.
3698 assert(vm_created == IN_PROGRESS, "must be");
3699 AtomicAccess::release_store(&vm_created, NOT_CREATED);
3700 }
3701
3702 // Flush stdout and stderr before exit.
3703 fflush(stdout);
3704 fflush(stderr);
3705
3706 return result;
3707
3708 }
3709
3710 _JNI_IMPORT_OR_EXPORT_ jint JNICALL JNI_CreateJavaVM(JavaVM **vm, void **penv, void *args) {
3711 jint result = JNI_ERR;
3712 // On Windows, let CreateJavaVM run with SEH protection
3713 #if defined(_WIN32) && !defined(USE_VECTORED_EXCEPTION_HANDLING)
3714 __try {
3715 #endif
3716 result = JNI_CreateJavaVM_inner(vm, penv, args);
3717 #if defined(_WIN32) && !defined(USE_VECTORED_EXCEPTION_HANDLING)
3718 } __except(topLevelExceptionFilter((_EXCEPTION_POINTERS*)_exception_info())) {
3719 // Nothing to do.
3720 }
3721 #endif
3722 return result;
3723 }
3724
3725 _JNI_IMPORT_OR_EXPORT_ jint JNICALL JNI_GetCreatedJavaVMs(JavaVM **vm_buf, jsize bufLen, jsize *numVMs) {
3726 HOTSPOT_JNI_GETCREATEDJAVAVMS_ENTRY((void **) vm_buf, bufLen, (uintptr_t *) numVMs);
3727
3728 if (vm_created == COMPLETE) {
3729 if (numVMs != nullptr) *numVMs = 1;
3730 if (bufLen > 0) *vm_buf = (JavaVM *)(&main_vm);
3731 } else {
3732 if (numVMs != nullptr) *numVMs = 0;
3733 }
3734 HOTSPOT_JNI_GETCREATEDJAVAVMS_RETURN(JNI_OK);
3735 return JNI_OK;
3736 }
3737
3738 extern "C" {
3739
3740 DT_RETURN_MARK_DECL(DestroyJavaVM, jint
3741 , HOTSPOT_JNI_DESTROYJAVAVM_RETURN(_ret_ref));
3742
3743 static jint JNICALL jni_DestroyJavaVM_inner(JavaVM *vm) {
3744 HOTSPOT_JNI_DESTROYJAVAVM_ENTRY(vm);
3745 jint res = JNI_ERR;
3746 DT_RETURN_MARK(DestroyJavaVM, jint, (const jint&)res);
3747
3748 if (vm_created == NOT_CREATED) {
3749 res = JNI_ERR;
3750 return res;
3751 }
3752
3753 JNIEnv *env;
3754 JavaVMAttachArgs destroyargs;
3755 destroyargs.version = CurrentVersion;
3756 destroyargs.name = (char *)"DestroyJavaVM";
3757 destroyargs.group = nullptr;
3758 res = vm->AttachCurrentThread((void **)&env, (void *)&destroyargs);
3759 if (res != JNI_OK) {
3760 return res;
3761 }
3762
3763 JavaThread* thread = JavaThread::current();
3764
3765 // Make sure we are actually in a newly attached thread, with no
3766 // existing Java frame.
3767 if (thread->has_last_Java_frame()) {
3768 return JNI_ERR;
3769 }
3770
3771 // Since this is not a JVM_ENTRY we have to set the thread state manually before entering.
3772
3773 // We are going to VM, change W^X state to the expected one.
3774 MACOS_AARCH64_ONLY(WXMode oldmode = thread->enable_wx(WXWrite));
3775
3776 ThreadStateTransition::transition_from_native(thread, _thread_in_vm);
3777 Threads::destroy_vm();
3778 // Don't bother restoring thread state, VM is gone.
3779 vm_created = NOT_CREATED;
3780 return JNI_OK;
3781 }
3782
3783 jint JNICALL jni_DestroyJavaVM(JavaVM *vm) {
3784 jint result = JNI_ERR;
3785 // On Windows, we need SEH protection
3786 #if defined(_WIN32) && !defined(USE_VECTORED_EXCEPTION_HANDLING)
3787 __try {
3788 #endif
3789 result = jni_DestroyJavaVM_inner(vm);
3790 #if defined(_WIN32) && !defined(USE_VECTORED_EXCEPTION_HANDLING)
3791 } __except(topLevelExceptionFilter((_EXCEPTION_POINTERS*)_exception_info())) {
3792 // Nothing to do.
3793 }
3794 #endif
3795 return result;
3796 }
3797
3798 static jint attach_current_thread(JavaVM *vm, void **penv, void *_args, bool daemon) {
3799 JavaVMAttachArgs *args = (JavaVMAttachArgs *) _args;
3800
3801 // Check below commented out from JDK1.2fcs as well
3802 /*
3803 if (args && (args->version != JNI_VERSION_1_1 || args->version != JNI_VERSION_1_2)) {
3804 return JNI_EVERSION;
3805 }
3806 */
3807
3808 Thread* t = Thread::current_or_null();
3809 if (t != nullptr) {
3810 // If executing from an atexit hook we may be in the VMThread.
3811 if (t->is_Java_thread()) {
3812 // If the thread has been attached this operation is a no-op
3813 *(JNIEnv**)penv = JavaThread::cast(t)->jni_environment();
3814 return JNI_OK;
3815 } else {
3816 return JNI_ERR;
3817 }
3818 }
3819
3820 // Create a thread and mark it as attaching so it will be skipped by the
3821 // ThreadsListEnumerator - see CR 6404306
3822 JavaThread* thread = JavaThread::create_attaching_thread();
3823
3824 // Set correct safepoint info. The thread is going to call into Java when
3825 // initializing the Java level thread object. Hence, the correct state must
3826 // be set in order for the Safepoint code to deal with it correctly.
3827 thread->set_thread_state(_thread_in_vm);
3828 thread->record_stack_base_and_size();
3829 thread->initialize_thread_current();
3830 thread->register_thread_stack_with_NMT();
3831 MACOS_AARCH64_ONLY(thread->init_wx());
3832
3833 if (!os::create_attached_thread(thread)) {
3834 thread->unregister_thread_stack_with_NMT();
3835 thread->smr_delete();
3836 return JNI_ERR;
3837 }
3838 // Enable stack overflow checks
3839 thread->stack_overflow_state()->create_stack_guard_pages();
3840
3841 thread->initialize_tlab();
3842
3843 thread->cache_global_variables();
3844
3845 // Set the _monitor_owner_id to the next thread_id temporarily while initialization runs.
3846 // Do it now before we make this thread visible in Threads::add().
3847 thread->set_monitor_owner_id(ThreadIdentifier::next());
3848
3849 // This thread will not do a safepoint check, since it has
3850 // not been added to the Thread list yet.
3851 { MutexLocker ml(Threads_lock);
3852 // This must be inside this lock in order to get FullGCALot to work properly, i.e., to
3853 // avoid this thread trying to do a GC before it is added to the thread-list
3854 thread->set_active_handles(JNIHandleBlock::allocate_block());
3855 Threads::add(thread, daemon);
3856 }
3857 // Create thread group and name info from attach arguments
3858 oop group = nullptr;
3859 char* thread_name = nullptr;
3860 if (args != nullptr && Threads::is_supported_jni_version(args->version)) {
3861 group = JNIHandles::resolve(args->group);
3862 thread_name = args->name; // may be null
3863 }
3864 if (group == nullptr) group = Universe::main_thread_group();
3865
3866 // Create Java level thread object and attach it to this thread
3867 bool attach_failed = false;
3868 {
3869 EXCEPTION_MARK;
3870 HandleMark hm(THREAD);
3871 Handle thread_group(THREAD, group);
3872 thread->allocate_threadObj(thread_group, thread_name, daemon, THREAD);
3873 if (HAS_PENDING_EXCEPTION) {
3874 CLEAR_PENDING_EXCEPTION;
3875 // cleanup outside the handle mark.
3876 attach_failed = true;
3877 }
3878 }
3879
3880 if (attach_failed) {
3881 // Added missing cleanup
3882 thread->cleanup_failed_attach_current_thread(daemon);
3883 thread->unregister_thread_stack_with_NMT();
3884 thread->smr_delete();
3885 return JNI_ERR;
3886 }
3887
3888 // Update the _monitor_owner_id with the tid value.
3889 thread->set_monitor_owner_id(java_lang_Thread::thread_id(thread->threadObj()));
3890
3891 // Want this inside 'attaching via jni'.
3892 JFR_ONLY(Jfr::on_thread_start(thread);)
3893
3894 // mark the thread as no longer attaching
3895 // this uses a fence to push the change through so we don't have
3896 // to regrab the threads_lock
3897 thread->set_done_attaching_via_jni();
3898
3899 // Set java thread status.
3900 java_lang_Thread::set_thread_status(thread->threadObj(),
3901 JavaThreadStatus::RUNNABLE);
3902
3903 // Notify the debugger
3904 if (JvmtiExport::should_post_thread_life()) {
3905 JvmtiExport::post_thread_start(thread);
3906 }
3907
3908 *(JNIEnv**)penv = thread->jni_environment();
3909
3910 // Now leaving the VM, so change thread_state. This is normally automatically taken care
3911 // of in the JVM_ENTRY. But in this situation we have to do it manually.
3912 ThreadStateTransition::transition_from_vm(thread, _thread_in_native);
3913 MACOS_AARCH64_ONLY(thread->enable_wx(WXExec));
3914
3915 // Perform any platform dependent FPU setup
3916 os::setup_fpu();
3917
3918 return JNI_OK;
3919 }
3920
3921
3922 jint JNICALL jni_AttachCurrentThread(JavaVM *vm, void **penv, void *_args) {
3923 HOTSPOT_JNI_ATTACHCURRENTTHREAD_ENTRY(vm, penv, _args);
3924 if (vm_created == NOT_CREATED) {
3925 // Not sure how we could possibly get here.
3926 HOTSPOT_JNI_ATTACHCURRENTTHREAD_RETURN((uint32_t) JNI_ERR);
3927 return JNI_ERR;
3928 }
3929
3930 jint ret = attach_current_thread(vm, penv, _args, false);
3931 HOTSPOT_JNI_ATTACHCURRENTTHREAD_RETURN(ret);
3932 return ret;
3933 }
3934
3935
3936 jint JNICALL jni_DetachCurrentThread(JavaVM *vm) {
3937 HOTSPOT_JNI_DETACHCURRENTTHREAD_ENTRY(vm);
3938 if (vm_created == NOT_CREATED) {
3939 // Not sure how we could possibly get here.
3940 HOTSPOT_JNI_DETACHCURRENTTHREAD_RETURN(JNI_ERR);
3941 return JNI_ERR;
3942 }
3943
3944 Thread* current = Thread::current_or_null();
3945
3946 // If the thread has already been detached the operation is a no-op
3947 if (current == nullptr) {
3948 HOTSPOT_JNI_DETACHCURRENTTHREAD_RETURN(JNI_OK);
3949 return JNI_OK;
3950 }
3951
3952 // If executing from an atexit hook we may be in the VMThread.
3953 if (!current->is_Java_thread()) {
3954 HOTSPOT_JNI_DETACHCURRENTTHREAD_RETURN((uint32_t) JNI_ERR);
3955 return JNI_ERR;
3956 }
3957
3958 VM_Exit::block_if_vm_exited();
3959
3960 JavaThread* thread = JavaThread::cast(current);
3961 if (thread->has_last_Java_frame()) {
3962 HOTSPOT_JNI_DETACHCURRENTTHREAD_RETURN((uint32_t) JNI_ERR);
3963 // Can't detach a thread that's running java, that can't work.
3964 return JNI_ERR;
3965 }
3966
3967 // We are going to VM, change W^X state to the expected one.
3968 MACOS_AARCH64_ONLY(thread->enable_wx(WXWrite));
3969
3970 // Safepoint support. Have to do call-back to safepoint code, if in the
3971 // middle of a safepoint operation
3972 ThreadStateTransition::transition_from_native(thread, _thread_in_vm);
3973
3974 // XXX: Note that JavaThread::exit() call below removes the guards on the
3975 // stack pages set up via enable_stack_{red,yellow}_zone() calls
3976 // above in jni_AttachCurrentThread. Unfortunately, while the setting
3977 // of the guards is visible in jni_AttachCurrentThread above,
3978 // the removal of the guards is buried below in JavaThread::exit()
3979 // here. The abstraction should be more symmetrically either exposed
3980 // or hidden (e.g. it could probably be hidden in the same
3981 // (platform-dependent) methods where we do alternate stack
3982 // maintenance work?)
3983 thread->exit(false, JavaThread::jni_detach);
3984 thread->unregister_thread_stack_with_NMT();
3985 thread->smr_delete();
3986
3987 // Go to the execute mode, the initial state of the thread on creation.
3988 // Use os interface as the thread is not a JavaThread anymore.
3989 MACOS_AARCH64_ONLY(os::current_thread_enable_wx(WXExec));
3990
3991 HOTSPOT_JNI_DETACHCURRENTTHREAD_RETURN(JNI_OK);
3992 return JNI_OK;
3993 }
3994
3995 DT_RETURN_MARK_DECL(GetEnv, jint
3996 , HOTSPOT_JNI_GETENV_RETURN(_ret_ref));
3997
3998 jint JNICALL jni_GetEnv(JavaVM *vm, void **penv, jint version) {
3999 HOTSPOT_JNI_GETENV_ENTRY(vm, penv, version);
4000 jint ret = JNI_ERR;
4001 DT_RETURN_MARK(GetEnv, jint, (const jint&)ret);
4002
4003 if (vm_created == NOT_CREATED) {
4004 *penv = nullptr;
4005 ret = JNI_EDETACHED;
4006 return ret;
4007 }
4008
4009 if (JniExportedInterface::GetExportedInterface(vm, penv, version, &ret)) {
4010 return ret;
4011 }
4012
4013 #ifndef JVMPI_VERSION_1
4014 // need these in order to be polite about older agents
4015 #define JVMPI_VERSION_1 ((jint)0x10000001)
4016 #define JVMPI_VERSION_1_1 ((jint)0x10000002)
4017 #define JVMPI_VERSION_1_2 ((jint)0x10000003)
4018 #endif // !JVMPI_VERSION_1
4019
4020 Thread* thread = Thread::current_or_null();
4021 if (thread != nullptr && thread->is_Java_thread()) {
4022 if (Threads::is_supported_jni_version_including_1_1(version)) {
4023 *(JNIEnv**)penv = JavaThread::cast(thread)->jni_environment();
4024 ret = JNI_OK;
4025 return ret;
4026
4027 } else if (version == JVMPI_VERSION_1 ||
4028 version == JVMPI_VERSION_1_1 ||
4029 version == JVMPI_VERSION_1_2) {
4030 tty->print_cr("ERROR: JVMPI, an experimental interface, is no longer supported.");
4031 tty->print_cr("Please use the supported interface: the JVM Tool Interface (JVM TI).");
4032 ret = JNI_EVERSION;
4033 return ret;
4034 } else if (JvmtiExport::is_jvmdi_version(version)) {
4035 tty->print_cr("FATAL ERROR: JVMDI is no longer supported.");
4036 tty->print_cr("Please use the supported interface: the JVM Tool Interface (JVM TI).");
4037 ret = JNI_EVERSION;
4038 return ret;
4039 } else {
4040 *penv = nullptr;
4041 ret = JNI_EVERSION;
4042 return ret;
4043 }
4044 } else {
4045 *penv = nullptr;
4046 ret = JNI_EDETACHED;
4047 return ret;
4048 }
4049 }
4050
4051
4052 jint JNICALL jni_AttachCurrentThreadAsDaemon(JavaVM *vm, void **penv, void *_args) {
4053 HOTSPOT_JNI_ATTACHCURRENTTHREADASDAEMON_ENTRY(vm, penv, _args);
4054 if (vm_created == NOT_CREATED) {
4055 // Not sure how we could possibly get here.
4056 HOTSPOT_JNI_ATTACHCURRENTTHREADASDAEMON_RETURN((uint32_t) JNI_ERR);
4057 return JNI_ERR;
4058 }
4059
4060 jint ret = attach_current_thread(vm, penv, _args, true);
4061 HOTSPOT_JNI_ATTACHCURRENTTHREADASDAEMON_RETURN(ret);
4062 return ret;
4063 }
4064
4065
4066 } // End extern "C"
4067
4068 const struct JNIInvokeInterface_ jni_InvokeInterface = {
4069 nullptr,
4070 nullptr,
4071 nullptr,
4072
4073 jni_DestroyJavaVM,
4074 jni_AttachCurrentThread,
4075 jni_DetachCurrentThread,
4076 jni_GetEnv,
4077 jni_AttachCurrentThreadAsDaemon
4078 };