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