1 /*
2 * Copyright (c) 1997, 2024, Oracle and/or its affiliates. All rights reserved.
3 * Copyright (c) 2012, 2024 Red Hat, Inc.
4 * Copyright (c) 2021, Azul Systems, Inc. All rights reserved.
5 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
6 *
7 * This code is free software; you can redistribute it and/or modify it
8 * under the terms of the GNU General Public License version 2 only, as
9 * published by the Free Software Foundation.
10 *
11 * This code is distributed in the hope that it will be useful, but WITHOUT
12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
14 * version 2 for more details (a copy is included in the LICENSE file that
15 * accompanied this code).
16 *
17 * You should have received a copy of the GNU General Public License version
18 * 2 along with this work; if not, write to the Free Software Foundation,
19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20 *
21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
22 * or visit www.oracle.com if you need additional information or have any
23 * questions.
24 *
25 */
26
27 #include "precompiled.hpp"
28 #include "ci/ciReplay.hpp"
29 #include "classfile/altHashing.hpp"
30 #include "classfile/classFileStream.hpp"
31 #include "classfile/classLoader.hpp"
32 #include "classfile/classLoadInfo.hpp"
33 #include "classfile/javaClasses.hpp"
34 #include "classfile/javaClasses.inline.hpp"
35 #include "classfile/javaThreadStatus.hpp"
36 #include "classfile/moduleEntry.hpp"
37 #include "classfile/modules.hpp"
38 #include "classfile/symbolTable.hpp"
39 #include "classfile/systemDictionary.hpp"
40 #include "classfile/vmClasses.hpp"
41 #include "classfile/vmSymbols.hpp"
42 #include "compiler/compiler_globals.hpp"
43 #include "gc/shared/collectedHeap.hpp"
44 #include "gc/shared/gcLocker.inline.hpp"
45 #include "gc/shared/stringdedup/stringDedup.hpp"
46 #include "interpreter/linkResolver.hpp"
47 #include "jni.h"
48 #include "jvm.h"
49 #include "logging/log.hpp"
50 #include "memory/allocation.hpp"
51 #include "memory/allocation.inline.hpp"
52 #include "memory/oopFactory.hpp"
53 #include "memory/resourceArea.hpp"
54 #include "memory/universe.hpp"
55 #include "nmt/memTracker.hpp"
56 #include "oops/access.inline.hpp"
57 #include "oops/arrayOop.hpp"
58 #include "oops/instanceKlass.inline.hpp"
59 #include "oops/instanceOop.hpp"
60 #include "oops/klass.inline.hpp"
61 #include "oops/markWord.hpp"
62 #include "oops/method.hpp"
63 #include "oops/objArrayKlass.hpp"
64 #include "oops/objArrayOop.inline.hpp"
65 #include "oops/oop.inline.hpp"
66 #include "oops/symbol.hpp"
67 #include "oops/typeArrayKlass.hpp"
68 #include "oops/typeArrayOop.inline.hpp"
69 #include "prims/jniCheck.hpp"
70 #include "prims/jniExport.hpp"
71 #include "prims/jniFastGetField.hpp"
72 #include "prims/jvm_misc.hpp"
73 #include "prims/jvmtiExport.hpp"
74 #include "prims/jvmtiThreadState.hpp"
75 #include "runtime/arguments.hpp"
76 #include "runtime/atomic.hpp"
77 #include "runtime/fieldDescriptor.inline.hpp"
78 #include "runtime/handles.inline.hpp"
79 #include "runtime/interfaceSupport.inline.hpp"
80 #include "runtime/java.hpp"
81 #include "runtime/javaCalls.hpp"
82 #include "runtime/javaThread.inline.hpp"
83 #include "runtime/jfieldIDWorkaround.hpp"
84 #include "runtime/jniHandles.inline.hpp"
85 #include "runtime/reflection.hpp"
86 #include "runtime/safepointVerifiers.hpp"
87 #include "runtime/sharedRuntime.hpp"
88 #include "runtime/signature.hpp"
89 #include "runtime/synchronizer.hpp"
90 #include "runtime/thread.inline.hpp"
91 #include "runtime/vmOperations.hpp"
92 #include "services/runtimeService.hpp"
93 #include "utilities/defaultStream.hpp"
94 #include "utilities/dtrace.hpp"
95 #include "utilities/events.hpp"
96 #include "utilities/macros.hpp"
97 #include "utilities/vmError.hpp"
98 #if INCLUDE_JVMCI
99 #include "jvmci/jvmciCompiler.hpp"
100 #endif
101 #if INCLUDE_JFR
102 #include "jfr/jfr.hpp"
103 #endif
104
105 static jint CurrentVersion = JNI_VERSION_24;
106
107 #if defined(_WIN32) && !defined(USE_VECTORED_EXCEPTION_HANDLING)
108 extern LONG WINAPI topLevelExceptionFilter(_EXCEPTION_POINTERS* );
109 #endif
110
111 // The DT_RETURN_MARK macros create a scoped object to fire the dtrace
112 // '-return' probe regardless of the return path is taken out of the function.
113 // Methods that have multiple return paths use this to avoid having to
114 // instrument each return path. Methods that use CHECK or THROW must use this
115 // since those macros can cause an immediate uninstrumented return.
116 //
117 // In order to get the return value, a reference to the variable containing
118 // the return value must be passed to the constructor of the object, and
119 // the return value must be set before return (since the mark object has
120 // a reference to it).
121 //
122 // Example:
123 // DT_RETURN_MARK_DECL(SomeFunc, int);
124 // JNI_ENTRY(int, SomeFunc, ...)
125 // int return_value = 0;
126 // DT_RETURN_MARK(SomeFunc, int, (const int&)return_value);
127 // foo(CHECK_0)
128 // return_value = 5;
129 // return return_value;
130 // JNI_END
131 #define DT_RETURN_MARK_DECL(name, type, probe) \
132 DTRACE_ONLY( \
133 class DTraceReturnProbeMark_##name { \
134 public: \
135 const type& _ret_ref; \
136 DTraceReturnProbeMark_##name(const type& v) : _ret_ref(v) {} \
137 ~DTraceReturnProbeMark_##name() { \
138 probe; \
139 } \
140 } \
141 )
142 // Void functions are simpler since there's no return value
143 #define DT_VOID_RETURN_MARK_DECL(name, probe) \
144 DTRACE_ONLY( \
145 class DTraceReturnProbeMark_##name { \
146 public: \
147 ~DTraceReturnProbeMark_##name() { \
148 probe; \
149 } \
150 } \
151 )
152
153 // Place these macros in the function to mark the return. Non-void
154 // functions need the type and address of the return value.
155 #define DT_RETURN_MARK(name, type, ref) \
156 DTRACE_ONLY( DTraceReturnProbeMark_##name dtrace_return_mark(ref) )
157 #define DT_VOID_RETURN_MARK(name) \
158 DTRACE_ONLY( DTraceReturnProbeMark_##name dtrace_return_mark )
159
160
161 // Use these to select distinct code for floating-point vs. non-floating point
162 // situations. Used from within common macros where we need slightly
163 // different behavior for Float/Double
164 #define FP_SELECT_Boolean(intcode, fpcode) intcode
165 #define FP_SELECT_Byte(intcode, fpcode) intcode
166 #define FP_SELECT_Char(intcode, fpcode) intcode
167 #define FP_SELECT_Short(intcode, fpcode) intcode
168 #define FP_SELECT_Object(intcode, fpcode) intcode
169 #define FP_SELECT_Int(intcode, fpcode) intcode
170 #define FP_SELECT_Long(intcode, fpcode) intcode
171 #define FP_SELECT_Float(intcode, fpcode) fpcode
172 #define FP_SELECT_Double(intcode, fpcode) fpcode
173 #define FP_SELECT(TypeName, intcode, fpcode) \
174 FP_SELECT_##TypeName(intcode, fpcode)
175
176 // Choose DT_RETURN_MARK macros based on the type: float/double -> void
177 // (dtrace doesn't do FP yet)
178 #define DT_RETURN_MARK_DECL_FOR(TypeName, name, type, probe) \
179 FP_SELECT(TypeName, \
180 DT_RETURN_MARK_DECL(name, type, probe), DT_VOID_RETURN_MARK_DECL(name, probe) )
181 #define DT_RETURN_MARK_FOR(TypeName, name, type, ref) \
182 FP_SELECT(TypeName, \
183 DT_RETURN_MARK(name, type, ref), DT_VOID_RETURN_MARK(name) )
184
185
186 // out-of-line helpers for class jfieldIDWorkaround:
187
188 bool jfieldIDWorkaround::is_valid_jfieldID(Klass* k, jfieldID id) {
189 if (jfieldIDWorkaround::is_instance_jfieldID(k, id)) {
190 uintptr_t as_uint = (uintptr_t) id;
191 int offset = raw_instance_offset(id);
192 if (is_checked_jfieldID(id)) {
193 if (!klass_hash_ok(k, id)) {
194 return false;
195 }
196 }
197 return InstanceKlass::cast(k)->contains_field_offset(offset);
198 } else {
199 JNIid* result = (JNIid*) id;
200 #ifdef ASSERT
201 return result != nullptr && result->is_static_field_id();
202 #else
203 return result != nullptr;
204 #endif
205 }
206 }
207
208
209 intptr_t jfieldIDWorkaround::encode_klass_hash(Klass* k, int offset) {
210 if (offset <= small_offset_mask) {
211 Klass* field_klass = k;
212 Klass* super_klass = field_klass->super();
213 // With compressed oops the most super class with nonstatic fields would
214 // be the owner of fields embedded in the header.
215 while (InstanceKlass::cast(super_klass)->has_nonstatic_fields() &&
216 InstanceKlass::cast(super_klass)->contains_field_offset(offset)) {
217 field_klass = super_klass; // super contains the field also
218 super_klass = field_klass->super();
219 }
220 debug_only(NoSafepointVerifier nosafepoint;)
221 uintptr_t klass_hash = field_klass->identity_hash();
222 return ((klass_hash & klass_mask) << klass_shift) | checked_mask_in_place;
223 } else {
224 #if 0
225 #ifndef PRODUCT
226 {
227 ResourceMark rm;
228 warning("VerifyJNIFields: long offset %d in %s", offset, k->external_name());
229 }
230 #endif
231 #endif
232 return 0;
233 }
234 }
235
236 bool jfieldIDWorkaround::klass_hash_ok(Klass* k, jfieldID id) {
237 uintptr_t as_uint = (uintptr_t) id;
238 intptr_t klass_hash = (as_uint >> klass_shift) & klass_mask;
239 do {
240 debug_only(NoSafepointVerifier nosafepoint;)
241 // Could use a non-blocking query for identity_hash here...
242 if ((k->identity_hash() & klass_mask) == klass_hash)
243 return true;
244 k = k->super();
245 } while (k != nullptr);
246 return false;
247 }
248
249 void jfieldIDWorkaround::verify_instance_jfieldID(Klass* k, jfieldID id) {
250 guarantee(jfieldIDWorkaround::is_instance_jfieldID(k, id), "must be an instance field" );
251 uintptr_t as_uint = (uintptr_t) id;
252 int offset = raw_instance_offset(id);
253 if (VerifyJNIFields) {
254 if (is_checked_jfieldID(id)) {
255 guarantee(klass_hash_ok(k, id),
256 "Bug in native code: jfieldID class must match object");
257 } else {
258 #if 0
259 #ifndef PRODUCT
260 if (Verbose) {
261 ResourceMark rm;
262 warning("VerifyJNIFields: unverified offset %d for %s", offset, k->external_name());
263 }
264 #endif
265 #endif
266 }
267 }
268 guarantee(InstanceKlass::cast(k)->contains_field_offset(offset),
269 "Bug in native code: jfieldID offset must address interior of object");
270 }
271
272 // Implementation of JNI entries
273
274 DT_RETURN_MARK_DECL(DefineClass, jclass
275 , HOTSPOT_JNI_DEFINECLASS_RETURN(_ret_ref));
276
277 JNI_ENTRY(jclass, jni_DefineClass(JNIEnv *env, const char *name, jobject loaderRef,
278 const jbyte *buf, jsize bufLen))
279 HOTSPOT_JNI_DEFINECLASS_ENTRY(
280 env, (char*) name, loaderRef, (char*) buf, bufLen);
281
282 jclass cls = nullptr;
283 DT_RETURN_MARK(DefineClass, jclass, (const jclass&)cls);
284
285 // Class resolution will get the class name from the .class stream if the name is null.
286 TempNewSymbol class_name = name == nullptr ? nullptr :
287 SystemDictionary::class_name_symbol(name, vmSymbols::java_lang_NoClassDefFoundError(),
288 CHECK_NULL);
289
290 ResourceMark rm(THREAD);
291 ClassFileStream st((u1*)buf, bufLen, nullptr, ClassFileStream::verify);
292 Handle class_loader (THREAD, JNIHandles::resolve(loaderRef));
293 Handle protection_domain;
294 ClassLoadInfo cl_info(protection_domain);
295 Klass* k = SystemDictionary::resolve_from_stream(&st, class_name,
296 class_loader,
297 cl_info,
298 CHECK_NULL);
299
300 if (log_is_enabled(Debug, class, resolve)) {
301 trace_class_resolution(k);
302 }
303
304 cls = (jclass)JNIHandles::make_local(THREAD, k->java_mirror());
305 return cls;
306 JNI_END
307
308
309
310 DT_RETURN_MARK_DECL(FindClass, jclass
311 , HOTSPOT_JNI_FINDCLASS_RETURN(_ret_ref));
312
313 JNI_ENTRY(jclass, jni_FindClass(JNIEnv *env, const char *name))
314 HOTSPOT_JNI_FINDCLASS_ENTRY(env, (char *)name);
315
316 jclass result = nullptr;
317 DT_RETURN_MARK(FindClass, jclass, (const jclass&)result);
318
319 // This should be ClassNotFoundException imo.
320 TempNewSymbol class_name =
321 SystemDictionary::class_name_symbol(name, vmSymbols::java_lang_NoClassDefFoundError(),
322 CHECK_NULL);
323
324 //%note jni_3
325 Handle protection_domain;
326 // Find calling class
327 Klass* k = thread->security_get_caller_class(0);
328 // default to the system loader when no context
329 Handle loader(THREAD, SystemDictionary::java_system_loader());
330 if (k != nullptr) {
331 // Special handling to make sure JNI_OnLoad and JNI_OnUnload are executed
332 // in the correct class context.
333 if (k->class_loader() == nullptr &&
334 k->name() == vmSymbols::jdk_internal_loader_NativeLibraries()) {
335 JavaValue result(T_OBJECT);
336 JavaCalls::call_static(&result, k,
337 vmSymbols::getFromClass_name(),
338 vmSymbols::void_class_signature(),
339 CHECK_NULL);
340 // When invoked from JNI_OnLoad, NativeLibraries::getFromClass returns
341 // a non-null Class object. When invoked from JNI_OnUnload,
342 // it will return null to indicate no context.
343 oop mirror = result.get_oop();
344 if (mirror != nullptr) {
345 Klass* fromClass = java_lang_Class::as_Klass(mirror);
346 loader = Handle(THREAD, fromClass->class_loader());
347 protection_domain = Handle(THREAD, fromClass->protection_domain());
348 }
349 } else {
350 loader = Handle(THREAD, k->class_loader());
351 }
352 }
353
354 result = find_class_from_class_loader(env, class_name, true, loader,
355 protection_domain, true, thread);
356
357 if (log_is_enabled(Debug, class, resolve) && result != nullptr) {
358 trace_class_resolution(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(result)));
359 }
360
361 return result;
362 JNI_END
363
364 DT_RETURN_MARK_DECL(FromReflectedMethod, jmethodID
365 , HOTSPOT_JNI_FROMREFLECTEDMETHOD_RETURN((uintptr_t)_ret_ref));
366
367 JNI_ENTRY(jmethodID, jni_FromReflectedMethod(JNIEnv *env, jobject method))
368 HOTSPOT_JNI_FROMREFLECTEDMETHOD_ENTRY(env, method);
369
370 jmethodID ret = nullptr;
371 DT_RETURN_MARK(FromReflectedMethod, jmethodID, (const jmethodID&)ret);
372
373 // method is a handle to a java.lang.reflect.Method object
374 oop reflected = JNIHandles::resolve_non_null(method);
375 oop mirror = nullptr;
376 int slot = 0;
377
378 if (reflected->klass() == vmClasses::reflect_Constructor_klass()) {
379 mirror = java_lang_reflect_Constructor::clazz(reflected);
380 slot = java_lang_reflect_Constructor::slot(reflected);
381 } else {
382 assert(reflected->klass() == vmClasses::reflect_Method_klass(), "wrong type");
383 mirror = java_lang_reflect_Method::clazz(reflected);
384 slot = java_lang_reflect_Method::slot(reflected);
385 }
386 Klass* k1 = java_lang_Class::as_Klass(mirror);
387
388 // Make sure class is initialized before handing id's out to methods
389 k1->initialize(CHECK_NULL);
390 Method* m = InstanceKlass::cast(k1)->method_with_idnum(slot);
391 ret = m==nullptr? nullptr : m->jmethod_id(); // return null if reflected method deleted
392 return ret;
393 JNI_END
394
395 DT_RETURN_MARK_DECL(FromReflectedField, jfieldID
396 , HOTSPOT_JNI_FROMREFLECTEDFIELD_RETURN((uintptr_t)_ret_ref));
397
398 JNI_ENTRY(jfieldID, jni_FromReflectedField(JNIEnv *env, jobject field))
399 HOTSPOT_JNI_FROMREFLECTEDFIELD_ENTRY(env, field);
400
401 jfieldID ret = nullptr;
402 DT_RETURN_MARK(FromReflectedField, jfieldID, (const jfieldID&)ret);
403
404 // field is a handle to a java.lang.reflect.Field object
405 oop reflected = JNIHandles::resolve_non_null(field);
406 oop mirror = java_lang_reflect_Field::clazz(reflected);
407 Klass* k1 = java_lang_Class::as_Klass(mirror);
408 int slot = java_lang_reflect_Field::slot(reflected);
409 int modifiers = java_lang_reflect_Field::modifiers(reflected);
410
411 // Make sure class is initialized before handing id's out to fields
412 k1->initialize(CHECK_NULL);
413
414 // First check if this is a static field
415 if (modifiers & JVM_ACC_STATIC) {
416 int offset = InstanceKlass::cast(k1)->field_offset( slot );
417 JNIid* id = InstanceKlass::cast(k1)->jni_id_for(offset);
418 assert(id != nullptr, "corrupt Field object");
419 debug_only(id->set_is_static_field_id();)
420 // A jfieldID for a static field is a JNIid specifying the field holder and the offset within the Klass*
421 ret = jfieldIDWorkaround::to_static_jfieldID(id);
422 return ret;
423 }
424
425 // The slot is the index of the field description in the field-array
426 // The jfieldID is the offset of the field within the object
427 // It may also have hash bits for k, if VerifyJNIFields is turned on.
428 int offset = InstanceKlass::cast(k1)->field_offset( slot );
429 assert(InstanceKlass::cast(k1)->contains_field_offset(offset), "stay within object");
430 ret = jfieldIDWorkaround::to_instance_jfieldID(k1, offset);
431 return ret;
432 JNI_END
433
434
435 DT_RETURN_MARK_DECL(ToReflectedMethod, jobject
436 , HOTSPOT_JNI_TOREFLECTEDMETHOD_RETURN(_ret_ref));
437
438 JNI_ENTRY(jobject, jni_ToReflectedMethod(JNIEnv *env, jclass cls, jmethodID method_id, jboolean isStatic))
439 HOTSPOT_JNI_TOREFLECTEDMETHOD_ENTRY(env, cls, (uintptr_t) method_id, isStatic);
440
441 jobject ret = nullptr;
442 DT_RETURN_MARK(ToReflectedMethod, jobject, (const jobject&)ret);
443
444 methodHandle m (THREAD, Method::resolve_jmethod_id(method_id));
445 assert(m->is_static() == (isStatic != 0), "jni_ToReflectedMethod access flags doesn't match");
446 oop reflection_method;
447 if (m->is_object_initializer()) {
448 reflection_method = Reflection::new_constructor(m, CHECK_NULL);
449 } else {
450 // Note: Static initializers can theoretically be here, if JNI users manage
451 // to get their jmethodID. Record them as plain methods.
452 reflection_method = Reflection::new_method(m, false, CHECK_NULL);
453 }
454 ret = JNIHandles::make_local(THREAD, reflection_method);
455 return ret;
456 JNI_END
457
458 DT_RETURN_MARK_DECL(GetSuperclass, jclass
459 , HOTSPOT_JNI_GETSUPERCLASS_RETURN(_ret_ref));
460
461 JNI_ENTRY(jclass, jni_GetSuperclass(JNIEnv *env, jclass sub))
462 HOTSPOT_JNI_GETSUPERCLASS_ENTRY(env, sub);
463
464 jclass obj = nullptr;
465 DT_RETURN_MARK(GetSuperclass, jclass, (const jclass&)obj);
466
467 oop mirror = JNIHandles::resolve_non_null(sub);
468 // primitive classes return null
469 if (java_lang_Class::is_primitive(mirror)) return nullptr;
470
471 // Rules of Class.getSuperClass as implemented by KLass::java_super:
472 // arrays return Object
473 // interfaces return null
474 // proper classes return Klass::super()
475 Klass* k = java_lang_Class::as_Klass(mirror);
476 if (k->is_interface()) return nullptr;
477
478 // return mirror for superclass
479 Klass* super = k->java_super();
480 // super2 is the value computed by the compiler's getSuperClass intrinsic:
481 debug_only(Klass* super2 = ( k->is_array_klass()
482 ? vmClasses::Object_klass()
483 : k->super() ) );
484 assert(super == super2,
485 "java_super computation depends on interface, array, other super");
486 obj = (super == nullptr) ? nullptr : (jclass) JNIHandles::make_local(THREAD, super->java_mirror());
487 return obj;
488 JNI_END
489
490 JNI_ENTRY_NO_PRESERVE(jboolean, jni_IsAssignableFrom(JNIEnv *env, jclass sub, jclass super))
491 HOTSPOT_JNI_ISASSIGNABLEFROM_ENTRY(env, sub, super);
492
493 oop sub_mirror = JNIHandles::resolve_non_null(sub);
494 oop super_mirror = JNIHandles::resolve_non_null(super);
495 if (java_lang_Class::is_primitive(sub_mirror) ||
496 java_lang_Class::is_primitive(super_mirror)) {
497 jboolean ret = (sub_mirror == super_mirror);
498
499 HOTSPOT_JNI_ISASSIGNABLEFROM_RETURN(ret);
500 return ret;
501 }
502 Klass* sub_klass = java_lang_Class::as_Klass(sub_mirror);
503 Klass* super_klass = java_lang_Class::as_Klass(super_mirror);
504 assert(sub_klass != nullptr && super_klass != nullptr, "invalid arguments to jni_IsAssignableFrom");
505 jboolean ret = sub_klass->is_subtype_of(super_klass) ?
506 JNI_TRUE : JNI_FALSE;
507
508 HOTSPOT_JNI_ISASSIGNABLEFROM_RETURN(ret);
509 return ret;
510 JNI_END
511
512
513 DT_RETURN_MARK_DECL(Throw, jint
514 , HOTSPOT_JNI_THROW_RETURN(_ret_ref));
515
516 JNI_ENTRY(jint, jni_Throw(JNIEnv *env, jthrowable obj))
517 HOTSPOT_JNI_THROW_ENTRY(env, obj);
518
519 jint ret = JNI_OK;
520 DT_RETURN_MARK(Throw, jint, (const jint&)ret);
521
522 THROW_OOP_(JNIHandles::resolve(obj), JNI_OK);
523 ShouldNotReachHere();
524 return 0; // Mute compiler.
525 JNI_END
526
527
528 DT_RETURN_MARK_DECL(ThrowNew, jint
529 , HOTSPOT_JNI_THROWNEW_RETURN(_ret_ref));
530
531 JNI_ENTRY(jint, jni_ThrowNew(JNIEnv *env, jclass clazz, const char *message))
532 HOTSPOT_JNI_THROWNEW_ENTRY(env, clazz, (char *) message);
533
534 jint ret = JNI_OK;
535 DT_RETURN_MARK(ThrowNew, jint, (const jint&)ret);
536
537 InstanceKlass* k = InstanceKlass::cast(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz)));
538 Symbol* name = k->name();
539 Handle class_loader (THREAD, k->class_loader());
540 Handle protection_domain (THREAD, k->protection_domain());
541 THROW_MSG_LOADER_(name, (char *)message, class_loader, protection_domain, JNI_OK);
542 ShouldNotReachHere();
543 return 0; // Mute compiler.
544 JNI_END
545
546
547 // JNI functions only transform a pending async exception to a synchronous
548 // exception in ExceptionOccurred and ExceptionCheck calls, since
549 // delivering an async exception in other places won't change the native
550 // code's control flow and would be harmful when native code further calls
551 // JNI functions with a pending exception. Async exception is also checked
552 // during the call, so ExceptionOccurred/ExceptionCheck won't return
553 // false but deliver the async exception at the very end during
554 // state transition.
555
556 static void jni_check_async_exceptions(JavaThread *thread) {
557 assert(thread == Thread::current(), "must be itself");
558 if (thread->has_async_exception_condition()) {
559 SafepointMechanism::process_if_requested_with_exit_check(thread, true /* check asyncs */);
560 }
561 }
562
563 JNI_ENTRY_NO_PRESERVE(jthrowable, jni_ExceptionOccurred(JNIEnv *env))
564 HOTSPOT_JNI_EXCEPTIONOCCURRED_ENTRY(env);
565
566 jni_check_async_exceptions(thread);
567 oop exception = thread->pending_exception();
568 jthrowable ret = (jthrowable) JNIHandles::make_local(THREAD, exception);
569
570 HOTSPOT_JNI_EXCEPTIONOCCURRED_RETURN(ret);
571 return ret;
572 JNI_END
573
574
575 JNI_ENTRY_NO_PRESERVE(void, jni_ExceptionDescribe(JNIEnv *env))
576 HOTSPOT_JNI_EXCEPTIONDESCRIBE_ENTRY(env);
577
578 if (thread->has_pending_exception()) {
579 Handle ex(thread, thread->pending_exception());
580 thread->clear_pending_exception();
581 jio_fprintf(defaultStream::error_stream(), "Exception ");
582 if (thread != nullptr && thread->threadObj() != nullptr) {
583 ResourceMark rm(THREAD);
584 jio_fprintf(defaultStream::error_stream(),
585 "in thread \"%s\" ", thread->name());
586 }
587 if (ex->is_a(vmClasses::Throwable_klass())) {
588 JavaValue result(T_VOID);
589 JavaCalls::call_virtual(&result,
590 ex,
591 vmClasses::Throwable_klass(),
592 vmSymbols::printStackTrace_name(),
593 vmSymbols::void_method_signature(),
594 THREAD);
595 // If an exception is thrown in the call it gets thrown away. Not much
596 // we can do with it. The native code that calls this, does not check
597 // for the exception - hence, it might still be in the thread when DestroyVM gets
598 // called, potentially causing a few asserts to trigger - since no pending exception
599 // is expected.
600 CLEAR_PENDING_EXCEPTION;
601 } else {
602 ResourceMark rm(THREAD);
603 jio_fprintf(defaultStream::error_stream(),
604 ". Uncaught exception of type %s.",
605 ex->klass()->external_name());
606 }
607 }
608
609 HOTSPOT_JNI_EXCEPTIONDESCRIBE_RETURN();
610 JNI_END
611
612
613 JNI_ENTRY_NO_PRESERVE(void, jni_ExceptionClear(JNIEnv *env))
614 HOTSPOT_JNI_EXCEPTIONCLEAR_ENTRY(env);
615
616 // The jni code might be using this API to clear java thrown exception.
617 // So just mark jvmti thread exception state as exception caught.
618 JvmtiThreadState *state = JavaThread::current()->jvmti_thread_state();
619 if (state != nullptr && state->is_exception_detected()) {
620 state->set_exception_caught();
621 }
622 thread->clear_pending_exception();
623
624 HOTSPOT_JNI_EXCEPTIONCLEAR_RETURN();
625 JNI_END
626
627
628 JNI_ENTRY(void, jni_FatalError(JNIEnv *env, const char *msg))
629 HOTSPOT_JNI_FATALERROR_ENTRY(env, (char *) msg);
630
631 tty->print_cr("FATAL ERROR in native method: %s", msg);
632 thread->print_jni_stack();
633 os::abort(); // Dump core and abort
634 JNI_END
635
636
637 JNI_ENTRY(jint, jni_PushLocalFrame(JNIEnv *env, jint capacity))
638 HOTSPOT_JNI_PUSHLOCALFRAME_ENTRY(env, capacity);
639
640 //%note jni_11
641 if (capacity < 0 ||
642 ((MaxJNILocalCapacity > 0) && (capacity > MaxJNILocalCapacity))) {
643 HOTSPOT_JNI_PUSHLOCALFRAME_RETURN((uint32_t)JNI_ERR);
644 return JNI_ERR;
645 }
646
647 thread->push_jni_handle_block();
648 jint ret = JNI_OK;
649 HOTSPOT_JNI_PUSHLOCALFRAME_RETURN(ret);
650 return ret;
651 JNI_END
652
653
654 JNI_ENTRY(jobject, jni_PopLocalFrame(JNIEnv *env, jobject result))
655 HOTSPOT_JNI_POPLOCALFRAME_ENTRY(env, result);
656
657 //%note jni_11
658 Handle result_handle(thread, JNIHandles::resolve(result));
659 JNIHandleBlock* old_handles = thread->active_handles();
660 JNIHandleBlock* new_handles = old_handles->pop_frame_link();
661 if (new_handles != nullptr) {
662 // As a sanity check we only release the handle blocks if the pop_frame_link is not null.
663 // This way code will still work if PopLocalFrame is called without a corresponding
664 // PushLocalFrame call. Note that we set the pop_frame_link to null explicitly, otherwise
665 // the release_block call will release the blocks.
666 thread->set_active_handles(new_handles);
667 old_handles->set_pop_frame_link(nullptr); // clear link we won't release new_handles below
668 JNIHandleBlock::release_block(old_handles, thread); // may block
669 result = JNIHandles::make_local(thread, result_handle());
670 }
671 HOTSPOT_JNI_POPLOCALFRAME_RETURN(result);
672 return result;
673 JNI_END
674
675
676 JNI_ENTRY(jobject, jni_NewGlobalRef(JNIEnv *env, jobject ref))
677 HOTSPOT_JNI_NEWGLOBALREF_ENTRY(env, ref);
678
679 Handle ref_handle(thread, JNIHandles::resolve(ref));
680 jobject ret = JNIHandles::make_global(ref_handle, AllocFailStrategy::RETURN_NULL);
681
682 HOTSPOT_JNI_NEWGLOBALREF_RETURN(ret);
683 return ret;
684 JNI_END
685
686 // Must be JNI_ENTRY (with HandleMark)
687 JNI_ENTRY_NO_PRESERVE(void, jni_DeleteGlobalRef(JNIEnv *env, jobject ref))
688 HOTSPOT_JNI_DELETEGLOBALREF_ENTRY(env, ref);
689
690 JNIHandles::destroy_global(ref);
691
692 HOTSPOT_JNI_DELETEGLOBALREF_RETURN();
693 JNI_END
694
695 JNI_ENTRY_NO_PRESERVE(void, jni_DeleteLocalRef(JNIEnv *env, jobject obj))
696 HOTSPOT_JNI_DELETELOCALREF_ENTRY(env, obj);
697
698 JNIHandles::destroy_local(obj);
699
700 HOTSPOT_JNI_DELETELOCALREF_RETURN();
701 JNI_END
702
703 JNI_ENTRY_NO_PRESERVE(jboolean, jni_IsSameObject(JNIEnv *env, jobject r1, jobject r2))
704 HOTSPOT_JNI_ISSAMEOBJECT_ENTRY(env, r1, r2);
705
706 jboolean ret = JNIHandles::is_same_object(r1, r2) ? JNI_TRUE : JNI_FALSE;
707
708 HOTSPOT_JNI_ISSAMEOBJECT_RETURN(ret);
709 return ret;
710 JNI_END
711
712
713 JNI_ENTRY(jobject, jni_NewLocalRef(JNIEnv *env, jobject ref))
714 HOTSPOT_JNI_NEWLOCALREF_ENTRY(env, ref);
715
716 jobject ret = JNIHandles::make_local(THREAD, JNIHandles::resolve(ref),
717 AllocFailStrategy::RETURN_NULL);
718
719 HOTSPOT_JNI_NEWLOCALREF_RETURN(ret);
720 return ret;
721 JNI_END
722
723 JNI_LEAF(jint, jni_EnsureLocalCapacity(JNIEnv *env, jint capacity))
724 HOTSPOT_JNI_ENSURELOCALCAPACITY_ENTRY(env, capacity);
725
726 jint ret;
727 if (capacity >= 0 &&
728 ((MaxJNILocalCapacity <= 0) || (capacity <= MaxJNILocalCapacity))) {
729 ret = JNI_OK;
730 } else {
731 ret = JNI_ERR;
732 }
733
734 HOTSPOT_JNI_ENSURELOCALCAPACITY_RETURN(ret);
735 return ret;
736 JNI_END
737
738 // Return the Handle Type
739 JNI_LEAF(jobjectRefType, jni_GetObjectRefType(JNIEnv *env, jobject obj))
740 HOTSPOT_JNI_GETOBJECTREFTYPE_ENTRY(env, obj);
741
742 jobjectRefType ret = JNIInvalidRefType;
743 if (obj != nullptr) {
744 ret = JNIHandles::handle_type(thread, obj);
745 }
746
747 HOTSPOT_JNI_GETOBJECTREFTYPE_RETURN((void *) ret);
748 return ret;
749 JNI_END
750
751
752 class JNI_ArgumentPusher : public SignatureIterator {
753 protected:
754 JavaCallArguments* _arguments;
755
756 void push_int(jint x) { _arguments->push_int(x); }
757 void push_long(jlong x) { _arguments->push_long(x); }
758 void push_float(jfloat x) { _arguments->push_float(x); }
759 void push_double(jdouble x) { _arguments->push_double(x); }
760 void push_object(jobject x) { _arguments->push_jobject(x); }
761
762 void push_boolean(jboolean b) {
763 // Normalize boolean arguments from native code by converting 1-255 to JNI_TRUE and
764 // 0 to JNI_FALSE. Boolean return values from native are normalized the same in
765 // TemplateInterpreterGenerator::generate_result_handler_for and
766 // SharedRuntime::generate_native_wrapper.
767 push_int(b == 0 ? JNI_FALSE : JNI_TRUE);
768 }
769
770 JNI_ArgumentPusher(Method* method)
771 : SignatureIterator(method->signature(),
772 Fingerprinter(methodHandle(Thread::current(), method)).fingerprint())
773 {
774 _arguments = nullptr;
775 }
776
777 public:
778 virtual void push_arguments_on(JavaCallArguments* arguments) = 0;
779 };
780
781
782 class JNI_ArgumentPusherVaArg : public JNI_ArgumentPusher {
783 va_list _ap;
784
785 void set_ap(va_list rap) {
786 va_copy(_ap, rap);
787 }
788
789 friend class SignatureIterator; // so do_parameters_on can call do_type
790 void do_type(BasicType type) {
791 switch (type) {
792 // these are coerced to int when using va_arg
793 case T_BYTE:
794 case T_CHAR:
795 case T_SHORT:
796 case T_INT: push_int(va_arg(_ap, jint)); break;
797 case T_BOOLEAN: push_boolean((jboolean) va_arg(_ap, jint)); break;
798
799 // each of these paths is exercised by the various jck Call[Static,Nonvirtual,][Void,Int,..]Method[A,V,] tests
800
801 case T_LONG: push_long(va_arg(_ap, jlong)); break;
802 // float is coerced to double w/ va_arg
803 case T_FLOAT: push_float((jfloat) va_arg(_ap, jdouble)); break;
804 case T_DOUBLE: push_double(va_arg(_ap, jdouble)); break;
805
806 case T_ARRAY:
807 case T_OBJECT: push_object(va_arg(_ap, jobject)); break;
808 default: ShouldNotReachHere();
809 }
810 }
811
812 public:
813 JNI_ArgumentPusherVaArg(jmethodID method_id, va_list rap)
814 : JNI_ArgumentPusher(Method::resolve_jmethod_id(method_id)) {
815 set_ap(rap);
816 }
817
818 ~JNI_ArgumentPusherVaArg() {
819 va_end(_ap);
820 }
821
822 virtual void push_arguments_on(JavaCallArguments* arguments) {
823 _arguments = arguments;
824 do_parameters_on(this);
825 }
826 };
827
828
829 class JNI_ArgumentPusherArray : public JNI_ArgumentPusher {
830 protected:
831 const jvalue *_ap;
832
833 inline void set_ap(const jvalue *rap) { _ap = rap; }
834
835 friend class SignatureIterator; // so do_parameters_on can call do_type
836 void do_type(BasicType type) {
837 switch (type) {
838 case T_CHAR: push_int((_ap++)->c); break;
839 case T_SHORT: push_int((_ap++)->s); break;
840 case T_BYTE: push_int((_ap++)->b); break;
841 case T_INT: push_int((_ap++)->i); break;
842 case T_BOOLEAN: push_boolean((_ap++)->z); break;
843 case T_LONG: push_long((_ap++)->j); break;
844 case T_FLOAT: push_float((_ap++)->f); break;
845 case T_DOUBLE: push_double((_ap++)->d); break;
846 case T_ARRAY:
847 case T_OBJECT: push_object((_ap++)->l); break;
848 default: ShouldNotReachHere();
849 }
850 }
851
852 public:
853 JNI_ArgumentPusherArray(jmethodID method_id, const jvalue *rap)
854 : JNI_ArgumentPusher(Method::resolve_jmethod_id(method_id)) {
855 set_ap(rap);
856 }
857
858 virtual void push_arguments_on(JavaCallArguments* arguments) {
859 _arguments = arguments;
860 do_parameters_on(this);
861 }
862 };
863
864
865 enum JNICallType {
866 JNI_STATIC,
867 JNI_VIRTUAL,
868 JNI_NONVIRTUAL
869 };
870
871
872
873 static void jni_invoke_static(JNIEnv *env, JavaValue* result, jobject receiver, JNICallType call_type, jmethodID method_id, JNI_ArgumentPusher *args, TRAPS) {
874 methodHandle method(THREAD, Method::resolve_jmethod_id(method_id));
875
876 // Create object to hold arguments for the JavaCall, and associate it with
877 // the jni parser
878 ResourceMark rm(THREAD);
879 int number_of_parameters = method->size_of_parameters();
880 JavaCallArguments java_args(number_of_parameters);
881
882 assert(method->is_static(), "method should be static");
883
884 // Fill out JavaCallArguments object
885 args->push_arguments_on(&java_args);
886 // Initialize result type
887 result->set_type(args->return_type());
888
889 // Invoke the method. Result is returned as oop.
890 JavaCalls::call(result, method, &java_args, CHECK);
891
892 // Convert result
893 if (is_reference_type(result->get_type())) {
894 result->set_jobject(JNIHandles::make_local(THREAD, result->get_oop()));
895 }
896 }
897
898
899 static void jni_invoke_nonstatic(JNIEnv *env, JavaValue* result, jobject receiver, JNICallType call_type, jmethodID method_id, JNI_ArgumentPusher *args, TRAPS) {
900 oop recv = JNIHandles::resolve(receiver);
901 if (recv == nullptr) {
902 THROW(vmSymbols::java_lang_NullPointerException());
903 }
904 Handle h_recv(THREAD, recv);
905
906 int number_of_parameters;
907 Method* selected_method;
908 {
909 Method* m = Method::resolve_jmethod_id(method_id);
910 number_of_parameters = m->size_of_parameters();
911 InstanceKlass* holder = m->method_holder();
912 if (call_type != JNI_VIRTUAL) {
913 selected_method = m;
914 } else if (!m->has_itable_index()) {
915 // non-interface call -- for that little speed boost, don't handlize
916 debug_only(NoSafepointVerifier nosafepoint;)
917 // jni_GetMethodID makes sure class is linked and initialized
918 // so m should have a valid vtable index.
919 assert(m->valid_vtable_index(), "no valid vtable index");
920 int vtbl_index = m->vtable_index();
921 if (vtbl_index != Method::nonvirtual_vtable_index) {
922 selected_method = h_recv->klass()->method_at_vtable(vtbl_index);
923 } else {
924 // final method
925 selected_method = m;
926 }
927 } else {
928 // interface call
929 int itbl_index = m->itable_index();
930 Klass* k = h_recv->klass();
931 selected_method = InstanceKlass::cast(k)->method_at_itable(holder, itbl_index, CHECK);
932 }
933 }
934
935 if (selected_method->is_abstract()) {
936 ResourceMark rm(THREAD);
937 THROW_MSG(vmSymbols::java_lang_AbstractMethodError(), selected_method->name()->as_C_string());
938 }
939
940 methodHandle method(THREAD, selected_method);
941
942 // Create object to hold arguments for the JavaCall, and associate it with
943 // the jni parser
944 ResourceMark rm(THREAD);
945 JavaCallArguments java_args(number_of_parameters);
946
947 // handle arguments
948 assert(!method->is_static(), "method %s should not be static", method->name_and_sig_as_C_string());
949 java_args.push_oop(h_recv); // Push jobject handle
950
951 // Fill out JavaCallArguments object
952 args->push_arguments_on(&java_args);
953 // Initialize result type
954 result->set_type(args->return_type());
955
956 // Invoke the method. Result is returned as oop.
957 JavaCalls::call(result, method, &java_args, CHECK);
958
959 // Convert result
960 if (is_reference_type(result->get_type())) {
961 result->set_jobject(JNIHandles::make_local(THREAD, result->get_oop()));
962 }
963 }
964
965 DT_RETURN_MARK_DECL(AllocObject, jobject
966 , HOTSPOT_JNI_ALLOCOBJECT_RETURN(_ret_ref));
967
968 JNI_ENTRY(jobject, jni_AllocObject(JNIEnv *env, jclass clazz))
969 HOTSPOT_JNI_ALLOCOBJECT_ENTRY(env, clazz);
970
971 jobject ret = nullptr;
972 DT_RETURN_MARK(AllocObject, jobject, (const jobject&)ret);
973
974 instanceOop i = InstanceKlass::allocate_instance(JNIHandles::resolve_non_null(clazz), "jni", CHECK_NULL);
975 ret = JNIHandles::make_local(THREAD, i);
976 return ret;
977 JNI_END
978
979 DT_RETURN_MARK_DECL(NewObjectA, jobject
980 , HOTSPOT_JNI_NEWOBJECTA_RETURN(_ret_ref));
981
982 JNI_ENTRY(jobject, jni_NewObjectA(JNIEnv *env, jclass clazz, jmethodID methodID, const jvalue *args))
983 HOTSPOT_JNI_NEWOBJECTA_ENTRY(env, clazz, (uintptr_t) methodID);
984
985 jobject obj = nullptr;
986 DT_RETURN_MARK(NewObjectA, jobject, (const jobject&)obj);
987
988 instanceOop i = InstanceKlass::allocate_instance(JNIHandles::resolve_non_null(clazz), "jni", CHECK_NULL);
989 obj = JNIHandles::make_local(THREAD, i);
990 JavaValue jvalue(T_VOID);
991 JNI_ArgumentPusherArray ap(methodID, args);
992 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_NULL);
993 return obj;
994 JNI_END
995
996
997 DT_RETURN_MARK_DECL(NewObjectV, jobject
998 , HOTSPOT_JNI_NEWOBJECTV_RETURN(_ret_ref));
999
1000 JNI_ENTRY(jobject, jni_NewObjectV(JNIEnv *env, jclass clazz, jmethodID methodID, va_list args))
1001 HOTSPOT_JNI_NEWOBJECTV_ENTRY(env, clazz, (uintptr_t) methodID);
1002
1003 jobject obj = nullptr;
1004 DT_RETURN_MARK(NewObjectV, jobject, (const jobject&)obj);
1005
1006 instanceOop i = InstanceKlass::allocate_instance(JNIHandles::resolve_non_null(clazz), "jni", CHECK_NULL);
1007 obj = JNIHandles::make_local(THREAD, i);
1008 JavaValue jvalue(T_VOID);
1009 JNI_ArgumentPusherVaArg ap(methodID, args);
1010 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_NULL);
1011 return obj;
1012 JNI_END
1013
1014
1015 DT_RETURN_MARK_DECL(NewObject, jobject
1016 , HOTSPOT_JNI_NEWOBJECT_RETURN(_ret_ref));
1017
1018 JNI_ENTRY(jobject, jni_NewObject(JNIEnv *env, jclass clazz, jmethodID methodID, ...))
1019 HOTSPOT_JNI_NEWOBJECT_ENTRY(env, clazz, (uintptr_t) methodID);
1020
1021 jobject obj = nullptr;
1022 DT_RETURN_MARK(NewObject, jobject, (const jobject&)obj);
1023
1024 instanceOop i = InstanceKlass::allocate_instance(JNIHandles::resolve_non_null(clazz), "jni", CHECK_NULL);
1025 obj = JNIHandles::make_local(THREAD, i);
1026 va_list args;
1027 va_start(args, methodID);
1028 JavaValue jvalue(T_VOID);
1029 JNI_ArgumentPusherVaArg ap(methodID, args);
1030 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_NULL);
1031 va_end(args);
1032 return obj;
1033 JNI_END
1034
1035
1036 JNI_ENTRY(jclass, jni_GetObjectClass(JNIEnv *env, jobject obj))
1037 HOTSPOT_JNI_GETOBJECTCLASS_ENTRY(env, obj);
1038
1039 Klass* k = JNIHandles::resolve_non_null(obj)->klass();
1040 jclass ret =
1041 (jclass) JNIHandles::make_local(THREAD, k->java_mirror());
1042
1043 HOTSPOT_JNI_GETOBJECTCLASS_RETURN(ret);
1044 return ret;
1045 JNI_END
1046
1047 JNI_ENTRY_NO_PRESERVE(jboolean, jni_IsInstanceOf(JNIEnv *env, jobject obj, jclass clazz))
1048 HOTSPOT_JNI_ISINSTANCEOF_ENTRY(env, obj, clazz);
1049
1050 jboolean ret = JNI_TRUE;
1051 if (obj != nullptr) {
1052 ret = JNI_FALSE;
1053 Klass* k = java_lang_Class::as_Klass(
1054 JNIHandles::resolve_non_null(clazz));
1055 if (k != nullptr) {
1056 ret = JNIHandles::resolve_non_null(obj)->is_a(k) ? JNI_TRUE : JNI_FALSE;
1057 }
1058 }
1059
1060 HOTSPOT_JNI_ISINSTANCEOF_RETURN(ret);
1061 return ret;
1062 JNI_END
1063
1064
1065 static jmethodID get_method_id(JNIEnv *env, jclass clazz, const char *name_str,
1066 const char *sig, bool is_static, TRAPS) {
1067 // %%%% This code should probably just call into a method in the LinkResolver
1068 //
1069 // The class should have been loaded (we have an instance of the class
1070 // passed in) so the method and signature should already be in the symbol
1071 // table. If they're not there, the method doesn't exist.
1072 const char *name_to_probe = (name_str == nullptr)
1073 ? vmSymbols::object_initializer_name()->as_C_string()
1074 : name_str;
1075 TempNewSymbol name = SymbolTable::probe(name_to_probe, (int)strlen(name_to_probe));
1076 TempNewSymbol signature = SymbolTable::probe(sig, (int)strlen(sig));
1077
1078 if (name == nullptr || signature == nullptr) {
1079 THROW_MSG_NULL(vmSymbols::java_lang_NoSuchMethodError(), name_str);
1080 }
1081
1082 oop mirror = JNIHandles::resolve_non_null(clazz);
1083 Klass* klass = java_lang_Class::as_Klass(mirror);
1084
1085 // Throw a NoSuchMethodError exception if we have an instance of a
1086 // primitive java.lang.Class
1087 if (java_lang_Class::is_primitive(mirror)) {
1088 ResourceMark rm(THREAD);
1089 THROW_MSG_NULL(vmSymbols::java_lang_NoSuchMethodError(), err_msg("%s%s.%s%s", is_static ? "static " : "", klass->signature_name(), name_str, sig));
1090 }
1091
1092 // Make sure class is linked and initialized before handing id's out to
1093 // Method*s.
1094 klass->initialize(CHECK_NULL);
1095
1096 Method* m;
1097 if (name == vmSymbols::object_initializer_name() ||
1098 name == vmSymbols::class_initializer_name()) {
1099 // Never search superclasses for constructors
1100 if (klass->is_instance_klass()) {
1101 m = InstanceKlass::cast(klass)->find_method(name, signature);
1102 } else {
1103 m = nullptr;
1104 }
1105 } else {
1106 m = klass->lookup_method(name, signature);
1107 if (m == nullptr && klass->is_instance_klass()) {
1108 m = InstanceKlass::cast(klass)->lookup_method_in_ordered_interfaces(name, signature);
1109 }
1110 }
1111 if (m == nullptr || (m->is_static() != is_static)) {
1112 ResourceMark rm(THREAD);
1113 THROW_MSG_NULL(vmSymbols::java_lang_NoSuchMethodError(), err_msg("%s%s.%s%s", is_static ? "static " : "", klass->signature_name(), name_str, sig));
1114 }
1115 return m->jmethod_id();
1116 }
1117
1118
1119 JNI_ENTRY(jmethodID, jni_GetMethodID(JNIEnv *env, jclass clazz,
1120 const char *name, const char *sig))
1121 HOTSPOT_JNI_GETMETHODID_ENTRY(env, clazz, (char *) name, (char *) sig);
1122 jmethodID ret = get_method_id(env, clazz, name, sig, false, thread);
1123 HOTSPOT_JNI_GETMETHODID_RETURN((uintptr_t) ret);
1124 return ret;
1125 JNI_END
1126
1127
1128 JNI_ENTRY(jmethodID, jni_GetStaticMethodID(JNIEnv *env, jclass clazz,
1129 const char *name, const char *sig))
1130 HOTSPOT_JNI_GETSTATICMETHODID_ENTRY(env, (char *) clazz, (char *) name, (char *)sig);
1131 jmethodID ret = get_method_id(env, clazz, name, sig, true, thread);
1132 HOTSPOT_JNI_GETSTATICMETHODID_RETURN((uintptr_t) ret);
1133 return ret;
1134 JNI_END
1135
1136
1137
1138 //
1139 // Calling Methods
1140 //
1141
1142
1143 #define DEFINE_CALLMETHOD(ResultType, Result, Tag \
1144 , EntryProbe, ReturnProbe) \
1145 \
1146 DT_RETURN_MARK_DECL_FOR(Result, Call##Result##Method, ResultType \
1147 , ReturnProbe); \
1148 \
1149 JNI_ENTRY(ResultType, \
1150 jni_Call##Result##Method(JNIEnv *env, jobject obj, jmethodID methodID, ...)) \
1151 \
1152 EntryProbe; \
1153 ResultType ret{}; \
1154 DT_RETURN_MARK_FOR(Result, Call##Result##Method, ResultType, \
1155 (const ResultType&)ret);\
1156 \
1157 va_list args; \
1158 va_start(args, methodID); \
1159 JavaValue jvalue(Tag); \
1160 JNI_ArgumentPusherVaArg ap(methodID, args); \
1161 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK_(ResultType{})); \
1162 va_end(args); \
1163 ret = jvalue.get_##ResultType(); \
1164 return ret;\
1165 JNI_END
1166
1167 // the runtime type of subword integral basic types is integer
1168 DEFINE_CALLMETHOD(jboolean, Boolean, T_BOOLEAN
1169 , HOTSPOT_JNI_CALLBOOLEANMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1170 HOTSPOT_JNI_CALLBOOLEANMETHOD_RETURN(_ret_ref))
1171 DEFINE_CALLMETHOD(jbyte, Byte, T_BYTE
1172 , HOTSPOT_JNI_CALLBYTEMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1173 HOTSPOT_JNI_CALLBYTEMETHOD_RETURN(_ret_ref))
1174 DEFINE_CALLMETHOD(jchar, Char, T_CHAR
1175 , HOTSPOT_JNI_CALLCHARMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1176 HOTSPOT_JNI_CALLCHARMETHOD_RETURN(_ret_ref))
1177 DEFINE_CALLMETHOD(jshort, Short, T_SHORT
1178 , HOTSPOT_JNI_CALLSHORTMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1179 HOTSPOT_JNI_CALLSHORTMETHOD_RETURN(_ret_ref))
1180
1181 DEFINE_CALLMETHOD(jobject, Object, T_OBJECT
1182 , HOTSPOT_JNI_CALLOBJECTMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1183 HOTSPOT_JNI_CALLOBJECTMETHOD_RETURN(_ret_ref))
1184 DEFINE_CALLMETHOD(jint, Int, T_INT,
1185 HOTSPOT_JNI_CALLINTMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1186 HOTSPOT_JNI_CALLINTMETHOD_RETURN(_ret_ref))
1187 DEFINE_CALLMETHOD(jlong, Long, T_LONG
1188 , HOTSPOT_JNI_CALLLONGMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1189 HOTSPOT_JNI_CALLLONGMETHOD_RETURN(_ret_ref))
1190 // Float and double probes don't return value because dtrace doesn't currently support it
1191 DEFINE_CALLMETHOD(jfloat, Float, T_FLOAT
1192 , HOTSPOT_JNI_CALLFLOATMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1193 HOTSPOT_JNI_CALLFLOATMETHOD_RETURN())
1194 DEFINE_CALLMETHOD(jdouble, Double, T_DOUBLE
1195 , HOTSPOT_JNI_CALLDOUBLEMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1196 HOTSPOT_JNI_CALLDOUBLEMETHOD_RETURN())
1197
1198 #define DEFINE_CALLMETHODV(ResultType, Result, Tag \
1199 , EntryProbe, ReturnProbe) \
1200 \
1201 DT_RETURN_MARK_DECL_FOR(Result, Call##Result##MethodV, ResultType \
1202 , ReturnProbe); \
1203 \
1204 JNI_ENTRY(ResultType, \
1205 jni_Call##Result##MethodV(JNIEnv *env, jobject obj, jmethodID methodID, va_list args)) \
1206 \
1207 EntryProbe;\
1208 ResultType ret{}; \
1209 DT_RETURN_MARK_FOR(Result, Call##Result##MethodV, ResultType, \
1210 (const ResultType&)ret);\
1211 \
1212 JavaValue jvalue(Tag); \
1213 JNI_ArgumentPusherVaArg ap(methodID, args); \
1214 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK_(ResultType{})); \
1215 ret = jvalue.get_##ResultType(); \
1216 return ret;\
1217 JNI_END
1218
1219 // the runtime type of subword integral basic types is integer
1220 DEFINE_CALLMETHODV(jboolean, Boolean, T_BOOLEAN
1221 , HOTSPOT_JNI_CALLBOOLEANMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1222 HOTSPOT_JNI_CALLBOOLEANMETHODV_RETURN(_ret_ref))
1223 DEFINE_CALLMETHODV(jbyte, Byte, T_BYTE
1224 , HOTSPOT_JNI_CALLBYTEMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1225 HOTSPOT_JNI_CALLBYTEMETHODV_RETURN(_ret_ref))
1226 DEFINE_CALLMETHODV(jchar, Char, T_CHAR
1227 , HOTSPOT_JNI_CALLCHARMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1228 HOTSPOT_JNI_CALLCHARMETHODV_RETURN(_ret_ref))
1229 DEFINE_CALLMETHODV(jshort, Short, T_SHORT
1230 , HOTSPOT_JNI_CALLSHORTMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1231 HOTSPOT_JNI_CALLSHORTMETHODV_RETURN(_ret_ref))
1232
1233 DEFINE_CALLMETHODV(jobject, Object, T_OBJECT
1234 , HOTSPOT_JNI_CALLOBJECTMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1235 HOTSPOT_JNI_CALLOBJECTMETHODV_RETURN(_ret_ref))
1236 DEFINE_CALLMETHODV(jint, Int, T_INT,
1237 HOTSPOT_JNI_CALLINTMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1238 HOTSPOT_JNI_CALLINTMETHODV_RETURN(_ret_ref))
1239 DEFINE_CALLMETHODV(jlong, Long, T_LONG
1240 , HOTSPOT_JNI_CALLLONGMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1241 HOTSPOT_JNI_CALLLONGMETHODV_RETURN(_ret_ref))
1242 // Float and double probes don't return value because dtrace doesn't currently support it
1243 DEFINE_CALLMETHODV(jfloat, Float, T_FLOAT
1244 , HOTSPOT_JNI_CALLFLOATMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1245 HOTSPOT_JNI_CALLFLOATMETHODV_RETURN())
1246 DEFINE_CALLMETHODV(jdouble, Double, T_DOUBLE
1247 , HOTSPOT_JNI_CALLDOUBLEMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1248 HOTSPOT_JNI_CALLDOUBLEMETHODV_RETURN())
1249
1250 #define DEFINE_CALLMETHODA(ResultType, Result, Tag \
1251 , EntryProbe, ReturnProbe) \
1252 \
1253 DT_RETURN_MARK_DECL_FOR(Result, Call##Result##MethodA, ResultType \
1254 , ReturnProbe); \
1255 \
1256 JNI_ENTRY(ResultType, \
1257 jni_Call##Result##MethodA(JNIEnv *env, jobject obj, jmethodID methodID, const jvalue *args)) \
1258 EntryProbe; \
1259 ResultType ret{}; \
1260 DT_RETURN_MARK_FOR(Result, Call##Result##MethodA, ResultType, \
1261 (const ResultType&)ret);\
1262 \
1263 JavaValue jvalue(Tag); \
1264 JNI_ArgumentPusherArray ap(methodID, args); \
1265 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK_(ResultType{})); \
1266 ret = jvalue.get_##ResultType(); \
1267 return ret;\
1268 JNI_END
1269
1270 // the runtime type of subword integral basic types is integer
1271 DEFINE_CALLMETHODA(jboolean, Boolean, T_BOOLEAN
1272 , HOTSPOT_JNI_CALLBOOLEANMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1273 HOTSPOT_JNI_CALLBOOLEANMETHODA_RETURN(_ret_ref))
1274 DEFINE_CALLMETHODA(jbyte, Byte, T_BYTE
1275 , HOTSPOT_JNI_CALLBYTEMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1276 HOTSPOT_JNI_CALLBYTEMETHODA_RETURN(_ret_ref))
1277 DEFINE_CALLMETHODA(jchar, Char, T_CHAR
1278 , HOTSPOT_JNI_CALLCHARMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1279 HOTSPOT_JNI_CALLCHARMETHODA_RETURN(_ret_ref))
1280 DEFINE_CALLMETHODA(jshort, Short, T_SHORT
1281 , HOTSPOT_JNI_CALLSHORTMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1282 HOTSPOT_JNI_CALLSHORTMETHODA_RETURN(_ret_ref))
1283
1284 DEFINE_CALLMETHODA(jobject, Object, T_OBJECT
1285 , HOTSPOT_JNI_CALLOBJECTMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1286 HOTSPOT_JNI_CALLOBJECTMETHODA_RETURN(_ret_ref))
1287 DEFINE_CALLMETHODA(jint, Int, T_INT,
1288 HOTSPOT_JNI_CALLINTMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1289 HOTSPOT_JNI_CALLINTMETHODA_RETURN(_ret_ref))
1290 DEFINE_CALLMETHODA(jlong, Long, T_LONG
1291 , HOTSPOT_JNI_CALLLONGMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1292 HOTSPOT_JNI_CALLLONGMETHODA_RETURN(_ret_ref))
1293 // Float and double probes don't return value because dtrace doesn't currently support it
1294 DEFINE_CALLMETHODA(jfloat, Float, T_FLOAT
1295 , HOTSPOT_JNI_CALLFLOATMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1296 HOTSPOT_JNI_CALLFLOATMETHODA_RETURN())
1297 DEFINE_CALLMETHODA(jdouble, Double, T_DOUBLE
1298 , HOTSPOT_JNI_CALLDOUBLEMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1299 HOTSPOT_JNI_CALLDOUBLEMETHODA_RETURN())
1300
1301 DT_VOID_RETURN_MARK_DECL(CallVoidMethod, HOTSPOT_JNI_CALLVOIDMETHOD_RETURN());
1302 DT_VOID_RETURN_MARK_DECL(CallVoidMethodV, HOTSPOT_JNI_CALLVOIDMETHODV_RETURN());
1303 DT_VOID_RETURN_MARK_DECL(CallVoidMethodA, HOTSPOT_JNI_CALLVOIDMETHODA_RETURN());
1304
1305
1306 JNI_ENTRY(void, jni_CallVoidMethod(JNIEnv *env, jobject obj, jmethodID methodID, ...))
1307 HOTSPOT_JNI_CALLVOIDMETHOD_ENTRY(env, obj, (uintptr_t) methodID);
1308 DT_VOID_RETURN_MARK(CallVoidMethod);
1309
1310 va_list args;
1311 va_start(args, methodID);
1312 JavaValue jvalue(T_VOID);
1313 JNI_ArgumentPusherVaArg ap(methodID, args);
1314 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK);
1315 va_end(args);
1316 JNI_END
1317
1318
1319 JNI_ENTRY(void, jni_CallVoidMethodV(JNIEnv *env, jobject obj, jmethodID methodID, va_list args))
1320 HOTSPOT_JNI_CALLVOIDMETHODV_ENTRY(env, obj, (uintptr_t) methodID);
1321 DT_VOID_RETURN_MARK(CallVoidMethodV);
1322
1323 JavaValue jvalue(T_VOID);
1324 JNI_ArgumentPusherVaArg ap(methodID, args);
1325 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK);
1326 JNI_END
1327
1328
1329 JNI_ENTRY(void, jni_CallVoidMethodA(JNIEnv *env, jobject obj, jmethodID methodID, const jvalue *args))
1330 HOTSPOT_JNI_CALLVOIDMETHODA_ENTRY(env, obj, (uintptr_t) methodID);
1331 DT_VOID_RETURN_MARK(CallVoidMethodA);
1332
1333 JavaValue jvalue(T_VOID);
1334 JNI_ArgumentPusherArray ap(methodID, args);
1335 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK);
1336 JNI_END
1337
1338
1339
1340 #define DEFINE_CALLNONVIRTUALMETHOD(ResultType, Result, Tag \
1341 , EntryProbe, ReturnProbe) \
1342 \
1343 DT_RETURN_MARK_DECL_FOR(Result, CallNonvirtual##Result##Method, ResultType \
1344 , ReturnProbe);\
1345 \
1346 JNI_ENTRY(ResultType, \
1347 jni_CallNonvirtual##Result##Method(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, ...)) \
1348 \
1349 EntryProbe;\
1350 ResultType ret;\
1351 DT_RETURN_MARK_FOR(Result, CallNonvirtual##Result##Method, ResultType, \
1352 (const ResultType&)ret);\
1353 \
1354 va_list args; \
1355 va_start(args, methodID); \
1356 JavaValue jvalue(Tag); \
1357 JNI_ArgumentPusherVaArg ap(methodID, args); \
1358 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_(ResultType{})); \
1359 va_end(args); \
1360 ret = jvalue.get_##ResultType(); \
1361 return ret;\
1362 JNI_END
1363
1364 // the runtime type of subword integral basic types is integer
1365 DEFINE_CALLNONVIRTUALMETHOD(jboolean, Boolean, T_BOOLEAN
1366 , HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1367 HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHOD_RETURN(_ret_ref))
1368 DEFINE_CALLNONVIRTUALMETHOD(jbyte, Byte, T_BYTE
1369 , HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1370 HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHOD_RETURN(_ret_ref))
1371 DEFINE_CALLNONVIRTUALMETHOD(jchar, Char, T_CHAR
1372 , HOTSPOT_JNI_CALLNONVIRTUALCHARMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1373 HOTSPOT_JNI_CALLNONVIRTUALCHARMETHOD_RETURN(_ret_ref))
1374 DEFINE_CALLNONVIRTUALMETHOD(jshort, Short, T_SHORT
1375 , HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1376 HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHOD_RETURN(_ret_ref))
1377
1378 DEFINE_CALLNONVIRTUALMETHOD(jobject, Object, T_OBJECT
1379 , HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1380 HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHOD_RETURN(_ret_ref))
1381 DEFINE_CALLNONVIRTUALMETHOD(jint, Int, T_INT
1382 , HOTSPOT_JNI_CALLNONVIRTUALINTMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1383 HOTSPOT_JNI_CALLNONVIRTUALINTMETHOD_RETURN(_ret_ref))
1384 DEFINE_CALLNONVIRTUALMETHOD(jlong, Long, T_LONG
1385 , HOTSPOT_JNI_CALLNONVIRTUALLONGMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1386 // Float and double probes don't return value because dtrace doesn't currently support it
1387 HOTSPOT_JNI_CALLNONVIRTUALLONGMETHOD_RETURN(_ret_ref))
1388 DEFINE_CALLNONVIRTUALMETHOD(jfloat, Float, T_FLOAT
1389 , HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1390 HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHOD_RETURN())
1391 DEFINE_CALLNONVIRTUALMETHOD(jdouble, Double, T_DOUBLE
1392 , HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1393 HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHOD_RETURN())
1394
1395 #define DEFINE_CALLNONVIRTUALMETHODV(ResultType, Result, Tag \
1396 , EntryProbe, ReturnProbe) \
1397 \
1398 DT_RETURN_MARK_DECL_FOR(Result, CallNonvirtual##Result##MethodV, ResultType \
1399 , ReturnProbe);\
1400 \
1401 JNI_ENTRY(ResultType, \
1402 jni_CallNonvirtual##Result##MethodV(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, va_list args)) \
1403 \
1404 EntryProbe;\
1405 ResultType ret;\
1406 DT_RETURN_MARK_FOR(Result, CallNonvirtual##Result##MethodV, ResultType, \
1407 (const ResultType&)ret);\
1408 \
1409 JavaValue jvalue(Tag); \
1410 JNI_ArgumentPusherVaArg ap(methodID, args); \
1411 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_(ResultType{})); \
1412 ret = jvalue.get_##ResultType(); \
1413 return ret;\
1414 JNI_END
1415
1416 // the runtime type of subword integral basic types is integer
1417 DEFINE_CALLNONVIRTUALMETHODV(jboolean, Boolean, T_BOOLEAN
1418 , HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1419 HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHODV_RETURN(_ret_ref))
1420 DEFINE_CALLNONVIRTUALMETHODV(jbyte, Byte, T_BYTE
1421 , HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1422 HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHODV_RETURN(_ret_ref))
1423 DEFINE_CALLNONVIRTUALMETHODV(jchar, Char, T_CHAR
1424 , HOTSPOT_JNI_CALLNONVIRTUALCHARMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1425 HOTSPOT_JNI_CALLNONVIRTUALCHARMETHODV_RETURN(_ret_ref))
1426 DEFINE_CALLNONVIRTUALMETHODV(jshort, Short, T_SHORT
1427 , HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1428 HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHODV_RETURN(_ret_ref))
1429
1430 DEFINE_CALLNONVIRTUALMETHODV(jobject, Object, T_OBJECT
1431 , HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1432 HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHODV_RETURN(_ret_ref))
1433 DEFINE_CALLNONVIRTUALMETHODV(jint, Int, T_INT
1434 , HOTSPOT_JNI_CALLNONVIRTUALINTMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1435 HOTSPOT_JNI_CALLNONVIRTUALINTMETHODV_RETURN(_ret_ref))
1436 DEFINE_CALLNONVIRTUALMETHODV(jlong, Long, T_LONG
1437 , HOTSPOT_JNI_CALLNONVIRTUALLONGMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1438 // Float and double probes don't return value because dtrace doesn't currently support it
1439 HOTSPOT_JNI_CALLNONVIRTUALLONGMETHODV_RETURN(_ret_ref))
1440 DEFINE_CALLNONVIRTUALMETHODV(jfloat, Float, T_FLOAT
1441 , HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1442 HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHODV_RETURN())
1443 DEFINE_CALLNONVIRTUALMETHODV(jdouble, Double, T_DOUBLE
1444 , HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1445 HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHODV_RETURN())
1446
1447 #define DEFINE_CALLNONVIRTUALMETHODA(ResultType, Result, Tag \
1448 , EntryProbe, ReturnProbe) \
1449 \
1450 DT_RETURN_MARK_DECL_FOR(Result, CallNonvirtual##Result##MethodA, ResultType \
1451 , ReturnProbe);\
1452 \
1453 JNI_ENTRY(ResultType, \
1454 jni_CallNonvirtual##Result##MethodA(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, const jvalue *args)) \
1455 \
1456 EntryProbe;\
1457 ResultType ret;\
1458 DT_RETURN_MARK_FOR(Result, CallNonvirtual##Result##MethodA, ResultType, \
1459 (const ResultType&)ret);\
1460 \
1461 JavaValue jvalue(Tag); \
1462 JNI_ArgumentPusherArray ap(methodID, args); \
1463 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_(ResultType{})); \
1464 ret = jvalue.get_##ResultType(); \
1465 return ret;\
1466 JNI_END
1467
1468 // the runtime type of subword integral basic types is integer
1469 DEFINE_CALLNONVIRTUALMETHODA(jboolean, Boolean, T_BOOLEAN
1470 , HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1471 HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHODA_RETURN(_ret_ref))
1472 DEFINE_CALLNONVIRTUALMETHODA(jbyte, Byte, T_BYTE
1473 , HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1474 HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHODA_RETURN(_ret_ref))
1475 DEFINE_CALLNONVIRTUALMETHODA(jchar, Char, T_CHAR
1476 , HOTSPOT_JNI_CALLNONVIRTUALCHARMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1477 HOTSPOT_JNI_CALLNONVIRTUALCHARMETHODA_RETURN(_ret_ref))
1478 DEFINE_CALLNONVIRTUALMETHODA(jshort, Short, T_SHORT
1479 , HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1480 HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHODA_RETURN(_ret_ref))
1481
1482 DEFINE_CALLNONVIRTUALMETHODA(jobject, Object, T_OBJECT
1483 , HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1484 HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHODA_RETURN(_ret_ref))
1485 DEFINE_CALLNONVIRTUALMETHODA(jint, Int, T_INT
1486 , HOTSPOT_JNI_CALLNONVIRTUALINTMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1487 HOTSPOT_JNI_CALLNONVIRTUALINTMETHODA_RETURN(_ret_ref))
1488 DEFINE_CALLNONVIRTUALMETHODA(jlong, Long, T_LONG
1489 , HOTSPOT_JNI_CALLNONVIRTUALLONGMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1490 // Float and double probes don't return value because dtrace doesn't currently support it
1491 HOTSPOT_JNI_CALLNONVIRTUALLONGMETHODA_RETURN(_ret_ref))
1492 DEFINE_CALLNONVIRTUALMETHODA(jfloat, Float, T_FLOAT
1493 , HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1494 HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHODA_RETURN())
1495 DEFINE_CALLNONVIRTUALMETHODA(jdouble, Double, T_DOUBLE
1496 , HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1497 HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHODA_RETURN())
1498
1499 DT_VOID_RETURN_MARK_DECL(CallNonvirtualVoidMethod
1500 , HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHOD_RETURN());
1501 DT_VOID_RETURN_MARK_DECL(CallNonvirtualVoidMethodV
1502 , HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHODV_RETURN());
1503 DT_VOID_RETURN_MARK_DECL(CallNonvirtualVoidMethodA
1504 , HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHODA_RETURN());
1505
1506 JNI_ENTRY(void, jni_CallNonvirtualVoidMethod(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, ...))
1507 HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHOD_ENTRY(env, obj, cls, (uintptr_t) methodID);
1508 DT_VOID_RETURN_MARK(CallNonvirtualVoidMethod);
1509
1510 va_list args;
1511 va_start(args, methodID);
1512 JavaValue jvalue(T_VOID);
1513 JNI_ArgumentPusherVaArg ap(methodID, args);
1514 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK);
1515 va_end(args);
1516 JNI_END
1517
1518
1519 JNI_ENTRY(void, jni_CallNonvirtualVoidMethodV(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, va_list args))
1520 HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHODV_ENTRY(
1521 env, obj, cls, (uintptr_t) methodID);
1522 DT_VOID_RETURN_MARK(CallNonvirtualVoidMethodV);
1523
1524 JavaValue jvalue(T_VOID);
1525 JNI_ArgumentPusherVaArg ap(methodID, args);
1526 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK);
1527 JNI_END
1528
1529
1530 JNI_ENTRY(void, jni_CallNonvirtualVoidMethodA(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, const jvalue *args))
1531 HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHODA_ENTRY(
1532 env, obj, cls, (uintptr_t) methodID);
1533 DT_VOID_RETURN_MARK(CallNonvirtualVoidMethodA);
1534 JavaValue jvalue(T_VOID);
1535 JNI_ArgumentPusherArray ap(methodID, args);
1536 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK);
1537 JNI_END
1538
1539
1540
1541 #define DEFINE_CALLSTATICMETHOD(ResultType, Result, Tag \
1542 , EntryProbe, ResultProbe) \
1543 \
1544 DT_RETURN_MARK_DECL_FOR(Result, CallStatic##Result##Method, ResultType \
1545 , ResultProbe); \
1546 \
1547 JNI_ENTRY(ResultType, \
1548 jni_CallStatic##Result##Method(JNIEnv *env, jclass cls, jmethodID methodID, ...)) \
1549 \
1550 EntryProbe; \
1551 ResultType ret{}; \
1552 DT_RETURN_MARK_FOR(Result, CallStatic##Result##Method, ResultType, \
1553 (const ResultType&)ret);\
1554 \
1555 va_list args; \
1556 va_start(args, methodID); \
1557 JavaValue jvalue(Tag); \
1558 JNI_ArgumentPusherVaArg ap(methodID, args); \
1559 jni_invoke_static(env, &jvalue, nullptr, JNI_STATIC, methodID, &ap, CHECK_(ResultType{})); \
1560 va_end(args); \
1561 ret = jvalue.get_##ResultType(); \
1562 return ret;\
1563 JNI_END
1564
1565 // the runtime type of subword integral basic types is integer
1566 DEFINE_CALLSTATICMETHOD(jboolean, Boolean, T_BOOLEAN
1567 , HOTSPOT_JNI_CALLSTATICBOOLEANMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1568 HOTSPOT_JNI_CALLSTATICBOOLEANMETHOD_RETURN(_ret_ref));
1569 DEFINE_CALLSTATICMETHOD(jbyte, Byte, T_BYTE
1570 , HOTSPOT_JNI_CALLSTATICBYTEMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1571 HOTSPOT_JNI_CALLSTATICBYTEMETHOD_RETURN(_ret_ref));
1572 DEFINE_CALLSTATICMETHOD(jchar, Char, T_CHAR
1573 , HOTSPOT_JNI_CALLSTATICCHARMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1574 HOTSPOT_JNI_CALLSTATICCHARMETHOD_RETURN(_ret_ref));
1575 DEFINE_CALLSTATICMETHOD(jshort, Short, T_SHORT
1576 , HOTSPOT_JNI_CALLSTATICSHORTMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1577 HOTSPOT_JNI_CALLSTATICSHORTMETHOD_RETURN(_ret_ref));
1578
1579 DEFINE_CALLSTATICMETHOD(jobject, Object, T_OBJECT
1580 , HOTSPOT_JNI_CALLSTATICOBJECTMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1581 HOTSPOT_JNI_CALLSTATICOBJECTMETHOD_RETURN(_ret_ref));
1582 DEFINE_CALLSTATICMETHOD(jint, Int, T_INT
1583 , HOTSPOT_JNI_CALLSTATICINTMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1584 HOTSPOT_JNI_CALLSTATICINTMETHOD_RETURN(_ret_ref));
1585 DEFINE_CALLSTATICMETHOD(jlong, Long, T_LONG
1586 , HOTSPOT_JNI_CALLSTATICLONGMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1587 HOTSPOT_JNI_CALLSTATICLONGMETHOD_RETURN(_ret_ref));
1588 // Float and double probes don't return value because dtrace doesn't currently support it
1589 DEFINE_CALLSTATICMETHOD(jfloat, Float, T_FLOAT
1590 , HOTSPOT_JNI_CALLSTATICFLOATMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1591 HOTSPOT_JNI_CALLSTATICFLOATMETHOD_RETURN());
1592 DEFINE_CALLSTATICMETHOD(jdouble, Double, T_DOUBLE
1593 , HOTSPOT_JNI_CALLSTATICDOUBLEMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1594 HOTSPOT_JNI_CALLSTATICDOUBLEMETHOD_RETURN());
1595
1596 #define DEFINE_CALLSTATICMETHODV(ResultType, Result, Tag \
1597 , EntryProbe, ResultProbe) \
1598 \
1599 DT_RETURN_MARK_DECL_FOR(Result, CallStatic##Result##MethodV, ResultType \
1600 , ResultProbe); \
1601 \
1602 JNI_ENTRY(ResultType, \
1603 jni_CallStatic##Result##MethodV(JNIEnv *env, jclass cls, jmethodID methodID, va_list args)) \
1604 \
1605 EntryProbe; \
1606 ResultType ret{}; \
1607 DT_RETURN_MARK_FOR(Result, CallStatic##Result##MethodV, ResultType, \
1608 (const ResultType&)ret);\
1609 \
1610 JavaValue jvalue(Tag); \
1611 JNI_ArgumentPusherVaArg ap(methodID, args); \
1612 /* Make sure class is initialized before trying to invoke its method */ \
1613 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); \
1614 k->initialize(CHECK_(ResultType{})); \
1615 jni_invoke_static(env, &jvalue, nullptr, JNI_STATIC, methodID, &ap, CHECK_(ResultType{})); \
1616 va_end(args); \
1617 ret = jvalue.get_##ResultType(); \
1618 return ret;\
1619 JNI_END
1620
1621 // the runtime type of subword integral basic types is integer
1622 DEFINE_CALLSTATICMETHODV(jboolean, Boolean, T_BOOLEAN
1623 , HOTSPOT_JNI_CALLSTATICBOOLEANMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1624 HOTSPOT_JNI_CALLSTATICBOOLEANMETHODV_RETURN(_ret_ref));
1625 DEFINE_CALLSTATICMETHODV(jbyte, Byte, T_BYTE
1626 , HOTSPOT_JNI_CALLSTATICBYTEMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1627 HOTSPOT_JNI_CALLSTATICBYTEMETHODV_RETURN(_ret_ref));
1628 DEFINE_CALLSTATICMETHODV(jchar, Char, T_CHAR
1629 , HOTSPOT_JNI_CALLSTATICCHARMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1630 HOTSPOT_JNI_CALLSTATICCHARMETHODV_RETURN(_ret_ref));
1631 DEFINE_CALLSTATICMETHODV(jshort, Short, T_SHORT
1632 , HOTSPOT_JNI_CALLSTATICSHORTMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1633 HOTSPOT_JNI_CALLSTATICSHORTMETHODV_RETURN(_ret_ref));
1634
1635 DEFINE_CALLSTATICMETHODV(jobject, Object, T_OBJECT
1636 , HOTSPOT_JNI_CALLSTATICOBJECTMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1637 HOTSPOT_JNI_CALLSTATICOBJECTMETHODV_RETURN(_ret_ref));
1638 DEFINE_CALLSTATICMETHODV(jint, Int, T_INT
1639 , HOTSPOT_JNI_CALLSTATICINTMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1640 HOTSPOT_JNI_CALLSTATICINTMETHODV_RETURN(_ret_ref));
1641 DEFINE_CALLSTATICMETHODV(jlong, Long, T_LONG
1642 , HOTSPOT_JNI_CALLSTATICLONGMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1643 HOTSPOT_JNI_CALLSTATICLONGMETHODV_RETURN(_ret_ref));
1644 // Float and double probes don't return value because dtrace doesn't currently support it
1645 DEFINE_CALLSTATICMETHODV(jfloat, Float, T_FLOAT
1646 , HOTSPOT_JNI_CALLSTATICFLOATMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1647 HOTSPOT_JNI_CALLSTATICFLOATMETHODV_RETURN());
1648 DEFINE_CALLSTATICMETHODV(jdouble, Double, T_DOUBLE
1649 , HOTSPOT_JNI_CALLSTATICDOUBLEMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1650 HOTSPOT_JNI_CALLSTATICDOUBLEMETHODV_RETURN());
1651
1652 #define DEFINE_CALLSTATICMETHODA(ResultType, Result, Tag \
1653 , EntryProbe, ResultProbe) \
1654 \
1655 DT_RETURN_MARK_DECL_FOR(Result, CallStatic##Result##MethodA, ResultType \
1656 , ResultProbe); \
1657 \
1658 JNI_ENTRY(ResultType, \
1659 jni_CallStatic##Result##MethodA(JNIEnv *env, jclass cls, jmethodID methodID, const jvalue *args)) \
1660 \
1661 EntryProbe; \
1662 ResultType ret{}; \
1663 DT_RETURN_MARK_FOR(Result, CallStatic##Result##MethodA, ResultType, \
1664 (const ResultType&)ret);\
1665 \
1666 JavaValue jvalue(Tag); \
1667 JNI_ArgumentPusherArray ap(methodID, args); \
1668 jni_invoke_static(env, &jvalue, nullptr, JNI_STATIC, methodID, &ap, CHECK_(ResultType{})); \
1669 ret = jvalue.get_##ResultType(); \
1670 return ret;\
1671 JNI_END
1672
1673 // the runtime type of subword integral basic types is integer
1674 DEFINE_CALLSTATICMETHODA(jboolean, Boolean, T_BOOLEAN
1675 , HOTSPOT_JNI_CALLSTATICBOOLEANMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1676 HOTSPOT_JNI_CALLSTATICBOOLEANMETHODA_RETURN(_ret_ref));
1677 DEFINE_CALLSTATICMETHODA(jbyte, Byte, T_BYTE
1678 , HOTSPOT_JNI_CALLSTATICBYTEMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1679 HOTSPOT_JNI_CALLSTATICBYTEMETHODA_RETURN(_ret_ref));
1680 DEFINE_CALLSTATICMETHODA(jchar, Char, T_CHAR
1681 , HOTSPOT_JNI_CALLSTATICCHARMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1682 HOTSPOT_JNI_CALLSTATICCHARMETHODA_RETURN(_ret_ref));
1683 DEFINE_CALLSTATICMETHODA(jshort, Short, T_SHORT
1684 , HOTSPOT_JNI_CALLSTATICSHORTMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1685 HOTSPOT_JNI_CALLSTATICSHORTMETHODA_RETURN(_ret_ref));
1686
1687 DEFINE_CALLSTATICMETHODA(jobject, Object, T_OBJECT
1688 , HOTSPOT_JNI_CALLSTATICOBJECTMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1689 HOTSPOT_JNI_CALLSTATICOBJECTMETHODA_RETURN(_ret_ref));
1690 DEFINE_CALLSTATICMETHODA(jint, Int, T_INT
1691 , HOTSPOT_JNI_CALLSTATICINTMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1692 HOTSPOT_JNI_CALLSTATICINTMETHODA_RETURN(_ret_ref));
1693 DEFINE_CALLSTATICMETHODA(jlong, Long, T_LONG
1694 , HOTSPOT_JNI_CALLSTATICLONGMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1695 HOTSPOT_JNI_CALLSTATICLONGMETHODA_RETURN(_ret_ref));
1696 // Float and double probes don't return value because dtrace doesn't currently support it
1697 DEFINE_CALLSTATICMETHODA(jfloat, Float, T_FLOAT
1698 , HOTSPOT_JNI_CALLSTATICFLOATMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1699 HOTSPOT_JNI_CALLSTATICFLOATMETHODA_RETURN());
1700 DEFINE_CALLSTATICMETHODA(jdouble, Double, T_DOUBLE
1701 , HOTSPOT_JNI_CALLSTATICDOUBLEMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1702 HOTSPOT_JNI_CALLSTATICDOUBLEMETHODA_RETURN());
1703
1704 DT_VOID_RETURN_MARK_DECL(CallStaticVoidMethod
1705 , HOTSPOT_JNI_CALLSTATICVOIDMETHOD_RETURN());
1706 DT_VOID_RETURN_MARK_DECL(CallStaticVoidMethodV
1707 , HOTSPOT_JNI_CALLSTATICVOIDMETHODV_RETURN());
1708 DT_VOID_RETURN_MARK_DECL(CallStaticVoidMethodA
1709 , HOTSPOT_JNI_CALLSTATICVOIDMETHODA_RETURN());
1710
1711 JNI_ENTRY(void, jni_CallStaticVoidMethod(JNIEnv *env, jclass cls, jmethodID methodID, ...))
1712 HOTSPOT_JNI_CALLSTATICVOIDMETHOD_ENTRY(env, cls, (uintptr_t) methodID);
1713 DT_VOID_RETURN_MARK(CallStaticVoidMethod);
1714
1715 va_list args;
1716 va_start(args, methodID);
1717 JavaValue jvalue(T_VOID);
1718 JNI_ArgumentPusherVaArg ap(methodID, args);
1719 jni_invoke_static(env, &jvalue, nullptr, JNI_STATIC, methodID, &ap, CHECK);
1720 va_end(args);
1721 JNI_END
1722
1723
1724 JNI_ENTRY(void, jni_CallStaticVoidMethodV(JNIEnv *env, jclass cls, jmethodID methodID, va_list args))
1725 HOTSPOT_JNI_CALLSTATICVOIDMETHODV_ENTRY(env, cls, (uintptr_t) methodID);
1726 DT_VOID_RETURN_MARK(CallStaticVoidMethodV);
1727
1728 JavaValue jvalue(T_VOID);
1729 JNI_ArgumentPusherVaArg ap(methodID, args);
1730 jni_invoke_static(env, &jvalue, nullptr, JNI_STATIC, methodID, &ap, CHECK);
1731 JNI_END
1732
1733
1734 JNI_ENTRY(void, jni_CallStaticVoidMethodA(JNIEnv *env, jclass cls, jmethodID methodID, const jvalue *args))
1735 HOTSPOT_JNI_CALLSTATICVOIDMETHODA_ENTRY(env, cls, (uintptr_t) methodID);
1736 DT_VOID_RETURN_MARK(CallStaticVoidMethodA);
1737
1738 JavaValue jvalue(T_VOID);
1739 JNI_ArgumentPusherArray ap(methodID, args);
1740 jni_invoke_static(env, &jvalue, nullptr, JNI_STATIC, methodID, &ap, CHECK);
1741 JNI_END
1742
1743
1744 //
1745 // Accessing Fields
1746 //
1747
1748
1749 DT_RETURN_MARK_DECL(GetFieldID, jfieldID
1750 , HOTSPOT_JNI_GETFIELDID_RETURN((uintptr_t)_ret_ref));
1751
1752 JNI_ENTRY(jfieldID, jni_GetFieldID(JNIEnv *env, jclass clazz,
1753 const char *name, const char *sig))
1754 HOTSPOT_JNI_GETFIELDID_ENTRY(env, clazz, (char *) name, (char *) sig);
1755 jfieldID ret = nullptr;
1756 DT_RETURN_MARK(GetFieldID, jfieldID, (const jfieldID&)ret);
1757
1758 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz));
1759
1760 // The class should have been loaded (we have an instance of the class
1761 // passed in) so the field and signature should already be in the symbol
1762 // table. If they're not there, the field doesn't exist.
1763 TempNewSymbol fieldname = SymbolTable::probe(name, (int)strlen(name));
1764 TempNewSymbol signame = SymbolTable::probe(sig, (int)strlen(sig));
1765 if (fieldname == nullptr || signame == nullptr) {
1766 ResourceMark rm;
1767 THROW_MSG_NULL(vmSymbols::java_lang_NoSuchFieldError(), err_msg("%s.%s %s", k->external_name(), name, sig));
1768 }
1769
1770 // Make sure class is initialized before handing id's out to fields
1771 k->initialize(CHECK_NULL);
1772
1773 fieldDescriptor fd;
1774 if (!k->is_instance_klass() ||
1775 !InstanceKlass::cast(k)->find_field(fieldname, signame, false, &fd)) {
1776 ResourceMark rm;
1777 THROW_MSG_NULL(vmSymbols::java_lang_NoSuchFieldError(), err_msg("%s.%s %s", k->external_name(), name, sig));
1778 }
1779
1780 // A jfieldID for a non-static field is simply the offset of the field within the instanceOop
1781 // It may also have hash bits for k, if VerifyJNIFields is turned on.
1782 ret = jfieldIDWorkaround::to_instance_jfieldID(k, fd.offset());
1783 return ret;
1784 JNI_END
1785
1786
1787 JNI_ENTRY(jobject, jni_GetObjectField(JNIEnv *env, jobject obj, jfieldID fieldID))
1788 HOTSPOT_JNI_GETOBJECTFIELD_ENTRY(env, obj, (uintptr_t) fieldID);
1789 oop o = JNIHandles::resolve_non_null(obj);
1790 Klass* k = o->klass();
1791 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID);
1792 // Keep JVMTI addition small and only check enabled flag here.
1793 // jni_GetField_probe() assumes that is okay to create handles.
1794 if (JvmtiExport::should_post_field_access()) {
1795 o = JvmtiExport::jni_GetField_probe(thread, obj, o, k, fieldID, false);
1796 }
1797 oop loaded_obj = HeapAccess<ON_UNKNOWN_OOP_REF>::oop_load_at(o, offset);
1798 jobject ret = JNIHandles::make_local(THREAD, loaded_obj);
1799 HOTSPOT_JNI_GETOBJECTFIELD_RETURN(ret);
1800 return ret;
1801 JNI_END
1802
1803
1804
1805 #define DEFINE_GETFIELD(Return,Fieldname,Result \
1806 , EntryProbe, ReturnProbe) \
1807 \
1808 DT_RETURN_MARK_DECL_FOR(Result, Get##Result##Field, Return \
1809 , ReturnProbe); \
1810 \
1811 JNI_ENTRY_NO_PRESERVE(Return, jni_Get##Result##Field(JNIEnv *env, jobject obj, jfieldID fieldID)) \
1812 \
1813 EntryProbe; \
1814 Return ret = 0;\
1815 DT_RETURN_MARK_FOR(Result, Get##Result##Field, Return, (const Return&)ret);\
1816 \
1817 oop o = JNIHandles::resolve_non_null(obj); \
1818 Klass* k = o->klass(); \
1819 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID); \
1820 /* Keep JVMTI addition small and only check enabled flag here. */ \
1821 if (JvmtiExport::should_post_field_access()) { \
1822 o = JvmtiExport::jni_GetField_probe(thread, obj, o, k, fieldID, false); \
1823 } \
1824 ret = o->Fieldname##_field(offset); \
1825 return ret; \
1826 JNI_END
1827
1828 DEFINE_GETFIELD(jboolean, bool, Boolean
1829 , HOTSPOT_JNI_GETBOOLEANFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
1830 HOTSPOT_JNI_GETBOOLEANFIELD_RETURN(_ret_ref))
1831 DEFINE_GETFIELD(jbyte, byte, Byte
1832 , HOTSPOT_JNI_GETBYTEFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
1833 HOTSPOT_JNI_GETBYTEFIELD_RETURN(_ret_ref))
1834 DEFINE_GETFIELD(jchar, char, Char
1835 , HOTSPOT_JNI_GETCHARFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
1836 HOTSPOT_JNI_GETCHARFIELD_RETURN(_ret_ref))
1837 DEFINE_GETFIELD(jshort, short, Short
1838 , HOTSPOT_JNI_GETSHORTFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
1839 HOTSPOT_JNI_GETSHORTFIELD_RETURN(_ret_ref))
1840 DEFINE_GETFIELD(jint, int, Int
1841 , HOTSPOT_JNI_GETINTFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
1842 HOTSPOT_JNI_GETINTFIELD_RETURN(_ret_ref))
1843 DEFINE_GETFIELD(jlong, long, Long
1844 , HOTSPOT_JNI_GETLONGFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
1845 HOTSPOT_JNI_GETLONGFIELD_RETURN(_ret_ref))
1846 // Float and double probes don't return value because dtrace doesn't currently support it
1847 DEFINE_GETFIELD(jfloat, float, Float
1848 , HOTSPOT_JNI_GETFLOATFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
1849 HOTSPOT_JNI_GETFLOATFIELD_RETURN())
1850 DEFINE_GETFIELD(jdouble, double, Double
1851 , HOTSPOT_JNI_GETDOUBLEFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
1852 HOTSPOT_JNI_GETDOUBLEFIELD_RETURN())
1853
1854 address jni_GetBooleanField_addr() {
1855 return (address)jni_GetBooleanField;
1856 }
1857 address jni_GetByteField_addr() {
1858 return (address)jni_GetByteField;
1859 }
1860 address jni_GetCharField_addr() {
1861 return (address)jni_GetCharField;
1862 }
1863 address jni_GetShortField_addr() {
1864 return (address)jni_GetShortField;
1865 }
1866 address jni_GetIntField_addr() {
1867 return (address)jni_GetIntField;
1868 }
1869 address jni_GetLongField_addr() {
1870 return (address)jni_GetLongField;
1871 }
1872 address jni_GetFloatField_addr() {
1873 return (address)jni_GetFloatField;
1874 }
1875 address jni_GetDoubleField_addr() {
1876 return (address)jni_GetDoubleField;
1877 }
1878
1879 JNI_ENTRY_NO_PRESERVE(void, jni_SetObjectField(JNIEnv *env, jobject obj, jfieldID fieldID, jobject value))
1880 HOTSPOT_JNI_SETOBJECTFIELD_ENTRY(env, obj, (uintptr_t) fieldID, value);
1881 oop o = JNIHandles::resolve_non_null(obj);
1882 Klass* k = o->klass();
1883 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID);
1884 // Keep JVMTI addition small and only check enabled flag here.
1885 if (JvmtiExport::should_post_field_modification()) {
1886 jvalue field_value;
1887 field_value.l = value;
1888 o = JvmtiExport::jni_SetField_probe(thread, obj, o, k, fieldID, false, JVM_SIGNATURE_CLASS, (jvalue *)&field_value);
1889 }
1890 HeapAccess<ON_UNKNOWN_OOP_REF>::oop_store_at(o, offset, JNIHandles::resolve(value));
1891 HOTSPOT_JNI_SETOBJECTFIELD_RETURN();
1892 JNI_END
1893
1894 // TODO: make this a template
1895
1896 #define DEFINE_SETFIELD(Argument,Fieldname,Result,SigType,unionType \
1897 , EntryProbe, ReturnProbe) \
1898 \
1899 JNI_ENTRY_NO_PRESERVE(void, jni_Set##Result##Field(JNIEnv *env, jobject obj, jfieldID fieldID, Argument value)) \
1900 \
1901 EntryProbe; \
1902 \
1903 oop o = JNIHandles::resolve_non_null(obj); \
1904 Klass* k = o->klass(); \
1905 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID); \
1906 /* Keep JVMTI addition small and only check enabled flag here. */ \
1907 if (JvmtiExport::should_post_field_modification()) { \
1908 jvalue field_value; \
1909 field_value.unionType = value; \
1910 o = JvmtiExport::jni_SetField_probe(thread, obj, o, k, fieldID, false, SigType, (jvalue *)&field_value); \
1911 } \
1912 o->Fieldname##_field_put(offset, value); \
1913 ReturnProbe; \
1914 JNI_END
1915
1916 DEFINE_SETFIELD(jboolean, bool, Boolean, JVM_SIGNATURE_BOOLEAN, z
1917 , HOTSPOT_JNI_SETBOOLEANFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value),
1918 HOTSPOT_JNI_SETBOOLEANFIELD_RETURN())
1919 DEFINE_SETFIELD(jbyte, byte, Byte, JVM_SIGNATURE_BYTE, b
1920 , HOTSPOT_JNI_SETBYTEFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value),
1921 HOTSPOT_JNI_SETBYTEFIELD_RETURN())
1922 DEFINE_SETFIELD(jchar, char, Char, JVM_SIGNATURE_CHAR, c
1923 , HOTSPOT_JNI_SETCHARFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value),
1924 HOTSPOT_JNI_SETCHARFIELD_RETURN())
1925 DEFINE_SETFIELD(jshort, short, Short, JVM_SIGNATURE_SHORT, s
1926 , HOTSPOT_JNI_SETSHORTFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value),
1927 HOTSPOT_JNI_SETSHORTFIELD_RETURN())
1928 DEFINE_SETFIELD(jint, int, Int, JVM_SIGNATURE_INT, i
1929 , HOTSPOT_JNI_SETINTFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value),
1930 HOTSPOT_JNI_SETINTFIELD_RETURN())
1931 DEFINE_SETFIELD(jlong, long, Long, JVM_SIGNATURE_LONG, j
1932 , HOTSPOT_JNI_SETLONGFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value),
1933 HOTSPOT_JNI_SETLONGFIELD_RETURN())
1934 // Float and double probes don't return value because dtrace doesn't currently support it
1935 DEFINE_SETFIELD(jfloat, float, Float, JVM_SIGNATURE_FLOAT, f
1936 , HOTSPOT_JNI_SETFLOATFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
1937 HOTSPOT_JNI_SETFLOATFIELD_RETURN())
1938 DEFINE_SETFIELD(jdouble, double, Double, JVM_SIGNATURE_DOUBLE, d
1939 , HOTSPOT_JNI_SETDOUBLEFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
1940 HOTSPOT_JNI_SETDOUBLEFIELD_RETURN())
1941
1942 DT_RETURN_MARK_DECL(ToReflectedField, jobject
1943 , HOTSPOT_JNI_TOREFLECTEDFIELD_RETURN(_ret_ref));
1944
1945 JNI_ENTRY(jobject, jni_ToReflectedField(JNIEnv *env, jclass cls, jfieldID fieldID, jboolean isStatic))
1946 HOTSPOT_JNI_TOREFLECTEDFIELD_ENTRY(env, cls, (uintptr_t) fieldID, isStatic);
1947 jobject ret = nullptr;
1948 DT_RETURN_MARK(ToReflectedField, jobject, (const jobject&)ret);
1949
1950 fieldDescriptor fd;
1951 bool found = false;
1952 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
1953
1954 assert(jfieldIDWorkaround::is_static_jfieldID(fieldID) == (isStatic != 0), "invalid fieldID");
1955
1956 if (isStatic) {
1957 // Static field. The fieldID a JNIid specifying the field holder and the offset within the Klass*.
1958 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID);
1959 assert(id->is_static_field_id(), "invalid static field id");
1960 found = id->find_local_field(&fd);
1961 } else {
1962 // Non-static field. The fieldID is really the offset of the field within the instanceOop.
1963 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID);
1964 found = InstanceKlass::cast(k)->find_field_from_offset(offset, false, &fd);
1965 }
1966 assert(found, "bad fieldID passed into jni_ToReflectedField");
1967 oop reflected = Reflection::new_field(&fd, CHECK_NULL);
1968 ret = JNIHandles::make_local(THREAD, reflected);
1969 return ret;
1970 JNI_END
1971
1972
1973 //
1974 // Accessing Static Fields
1975 //
1976 DT_RETURN_MARK_DECL(GetStaticFieldID, jfieldID
1977 , HOTSPOT_JNI_GETSTATICFIELDID_RETURN((uintptr_t)_ret_ref));
1978
1979 JNI_ENTRY(jfieldID, jni_GetStaticFieldID(JNIEnv *env, jclass clazz,
1980 const char *name, const char *sig))
1981 HOTSPOT_JNI_GETSTATICFIELDID_ENTRY(env, clazz, (char *) name, (char *) sig);
1982 jfieldID ret = nullptr;
1983 DT_RETURN_MARK(GetStaticFieldID, jfieldID, (const jfieldID&)ret);
1984
1985 // The class should have been loaded (we have an instance of the class
1986 // passed in) so the field and signature should already be in the symbol
1987 // table. If they're not there, the field doesn't exist.
1988 TempNewSymbol fieldname = SymbolTable::probe(name, (int)strlen(name));
1989 TempNewSymbol signame = SymbolTable::probe(sig, (int)strlen(sig));
1990 if (fieldname == nullptr || signame == nullptr) {
1991 THROW_MSG_NULL(vmSymbols::java_lang_NoSuchFieldError(), (char*) name);
1992 }
1993 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz));
1994 // Make sure class is initialized before handing id's out to static fields
1995 k->initialize(CHECK_NULL);
1996
1997 fieldDescriptor fd;
1998 if (!k->is_instance_klass() ||
1999 !InstanceKlass::cast(k)->find_field(fieldname, signame, true, &fd)) {
2000 THROW_MSG_NULL(vmSymbols::java_lang_NoSuchFieldError(), (char*) name);
2001 }
2002
2003 // A jfieldID for a static field is a JNIid specifying the field holder and the offset within the Klass*
2004 JNIid* id = fd.field_holder()->jni_id_for(fd.offset());
2005 debug_only(id->set_is_static_field_id();)
2006
2007 debug_only(id->verify(fd.field_holder()));
2008
2009 ret = jfieldIDWorkaround::to_static_jfieldID(id);
2010 return ret;
2011 JNI_END
2012
2013
2014 JNI_ENTRY(jobject, jni_GetStaticObjectField(JNIEnv *env, jclass clazz, jfieldID fieldID))
2015 HOTSPOT_JNI_GETSTATICOBJECTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID);
2016 #if INCLUDE_JNI_CHECK
2017 DEBUG_ONLY(Klass* param_k = jniCheck::validate_class(thread, clazz);)
2018 #endif // INCLUDE_JNI_CHECK
2019 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID);
2020 assert(id->is_static_field_id(), "invalid static field id");
2021 // Keep JVMTI addition small and only check enabled flag here.
2022 // jni_GetField_probe() assumes that is okay to create handles.
2023 if (JvmtiExport::should_post_field_access()) {
2024 JvmtiExport::jni_GetField_probe(thread, nullptr, nullptr, id->holder(), fieldID, true);
2025 }
2026 jobject ret = JNIHandles::make_local(THREAD, id->holder()->java_mirror()->obj_field(id->offset()));
2027 HOTSPOT_JNI_GETSTATICOBJECTFIELD_RETURN(ret);
2028 return ret;
2029 JNI_END
2030
2031
2032 #define DEFINE_GETSTATICFIELD(Return,Fieldname,Result \
2033 , EntryProbe, ReturnProbe) \
2034 \
2035 DT_RETURN_MARK_DECL_FOR(Result, GetStatic##Result##Field, Return \
2036 , ReturnProbe); \
2037 \
2038 JNI_ENTRY(Return, jni_GetStatic##Result##Field(JNIEnv *env, jclass clazz, jfieldID fieldID)) \
2039 EntryProbe; \
2040 Return ret = 0;\
2041 DT_RETURN_MARK_FOR(Result, GetStatic##Result##Field, Return, \
2042 (const Return&)ret);\
2043 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID); \
2044 assert(id->is_static_field_id(), "invalid static field id"); \
2045 /* Keep JVMTI addition small and only check enabled flag here. */ \
2046 /* jni_GetField_probe() assumes that is okay to create handles. */ \
2047 if (JvmtiExport::should_post_field_access()) { \
2048 JvmtiExport::jni_GetField_probe(thread, nullptr, nullptr, id->holder(), fieldID, true); \
2049 } \
2050 ret = id->holder()->java_mirror()-> Fieldname##_field (id->offset()); \
2051 return ret;\
2052 JNI_END
2053
2054 DEFINE_GETSTATICFIELD(jboolean, bool, Boolean
2055 , HOTSPOT_JNI_GETSTATICBOOLEANFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICBOOLEANFIELD_RETURN(_ret_ref))
2056 DEFINE_GETSTATICFIELD(jbyte, byte, Byte
2057 , HOTSPOT_JNI_GETSTATICBYTEFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICBYTEFIELD_RETURN(_ret_ref) )
2058 DEFINE_GETSTATICFIELD(jchar, char, Char
2059 , HOTSPOT_JNI_GETSTATICCHARFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICCHARFIELD_RETURN(_ret_ref) )
2060 DEFINE_GETSTATICFIELD(jshort, short, Short
2061 , HOTSPOT_JNI_GETSTATICSHORTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICSHORTFIELD_RETURN(_ret_ref) )
2062 DEFINE_GETSTATICFIELD(jint, int, Int
2063 , HOTSPOT_JNI_GETSTATICINTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICINTFIELD_RETURN(_ret_ref) )
2064 DEFINE_GETSTATICFIELD(jlong, long, Long
2065 , HOTSPOT_JNI_GETSTATICLONGFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICLONGFIELD_RETURN(_ret_ref) )
2066 // Float and double probes don't return value because dtrace doesn't currently support it
2067 DEFINE_GETSTATICFIELD(jfloat, float, Float
2068 , HOTSPOT_JNI_GETSTATICFLOATFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICFLOATFIELD_RETURN() )
2069 DEFINE_GETSTATICFIELD(jdouble, double, Double
2070 , HOTSPOT_JNI_GETSTATICDOUBLEFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICDOUBLEFIELD_RETURN() )
2071
2072 JNI_ENTRY(void, jni_SetStaticObjectField(JNIEnv *env, jclass clazz, jfieldID fieldID, jobject value))
2073 HOTSPOT_JNI_SETSTATICOBJECTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value);
2074 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID);
2075 assert(id->is_static_field_id(), "invalid static field id");
2076 // Keep JVMTI addition small and only check enabled flag here.
2077 // jni_SetField_probe() assumes that is okay to create handles.
2078 if (JvmtiExport::should_post_field_modification()) {
2079 jvalue field_value;
2080 field_value.l = value;
2081 JvmtiExport::jni_SetField_probe(thread, nullptr, nullptr, id->holder(), fieldID, true, JVM_SIGNATURE_CLASS, (jvalue *)&field_value);
2082 }
2083 id->holder()->java_mirror()->obj_field_put(id->offset(), JNIHandles::resolve(value));
2084 HOTSPOT_JNI_SETSTATICOBJECTFIELD_RETURN();
2085 JNI_END
2086
2087
2088
2089 #define DEFINE_SETSTATICFIELD(Argument,Fieldname,Result,SigType,unionType \
2090 , EntryProbe, ReturnProbe) \
2091 \
2092 JNI_ENTRY(void, jni_SetStatic##Result##Field(JNIEnv *env, jclass clazz, jfieldID fieldID, Argument value)) \
2093 EntryProbe; \
2094 \
2095 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID); \
2096 assert(id->is_static_field_id(), "invalid static field id"); \
2097 /* Keep JVMTI addition small and only check enabled flag here. */ \
2098 /* jni_SetField_probe() assumes that is okay to create handles. */ \
2099 if (JvmtiExport::should_post_field_modification()) { \
2100 jvalue field_value; \
2101 field_value.unionType = value; \
2102 JvmtiExport::jni_SetField_probe(thread, nullptr, nullptr, id->holder(), fieldID, true, SigType, (jvalue *)&field_value); \
2103 } \
2104 id->holder()->java_mirror()-> Fieldname##_field_put (id->offset(), value); \
2105 ReturnProbe;\
2106 JNI_END
2107
2108 DEFINE_SETSTATICFIELD(jboolean, bool, Boolean, JVM_SIGNATURE_BOOLEAN, z
2109 , HOTSPOT_JNI_SETSTATICBOOLEANFIELD_ENTRY(env, clazz, (uintptr_t)fieldID, value),
2110 HOTSPOT_JNI_SETSTATICBOOLEANFIELD_RETURN())
2111 DEFINE_SETSTATICFIELD(jbyte, byte, Byte, JVM_SIGNATURE_BYTE, b
2112 , HOTSPOT_JNI_SETSTATICBYTEFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value),
2113 HOTSPOT_JNI_SETSTATICBYTEFIELD_RETURN())
2114 DEFINE_SETSTATICFIELD(jchar, char, Char, JVM_SIGNATURE_CHAR, c
2115 , HOTSPOT_JNI_SETSTATICCHARFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value),
2116 HOTSPOT_JNI_SETSTATICCHARFIELD_RETURN())
2117 DEFINE_SETSTATICFIELD(jshort, short, Short, JVM_SIGNATURE_SHORT, s
2118 , HOTSPOT_JNI_SETSTATICSHORTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value),
2119 HOTSPOT_JNI_SETSTATICSHORTFIELD_RETURN())
2120 DEFINE_SETSTATICFIELD(jint, int, Int, JVM_SIGNATURE_INT, i
2121 , HOTSPOT_JNI_SETSTATICINTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value),
2122 HOTSPOT_JNI_SETSTATICINTFIELD_RETURN())
2123 DEFINE_SETSTATICFIELD(jlong, long, Long, JVM_SIGNATURE_LONG, j
2124 , HOTSPOT_JNI_SETSTATICLONGFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value),
2125 HOTSPOT_JNI_SETSTATICLONGFIELD_RETURN())
2126 // Float and double probes don't return value because dtrace doesn't currently support it
2127 DEFINE_SETSTATICFIELD(jfloat, float, Float, JVM_SIGNATURE_FLOAT, f
2128 , HOTSPOT_JNI_SETSTATICFLOATFIELD_ENTRY(env, clazz, (uintptr_t) fieldID),
2129 HOTSPOT_JNI_SETSTATICFLOATFIELD_RETURN())
2130 DEFINE_SETSTATICFIELD(jdouble, double, Double, JVM_SIGNATURE_DOUBLE, d
2131 , HOTSPOT_JNI_SETSTATICDOUBLEFIELD_ENTRY(env, clazz, (uintptr_t) fieldID),
2132 HOTSPOT_JNI_SETSTATICDOUBLEFIELD_RETURN())
2133
2134 //
2135 // String Operations
2136 //
2137
2138 // Unicode Interface
2139
2140 DT_RETURN_MARK_DECL(NewString, jstring
2141 , HOTSPOT_JNI_NEWSTRING_RETURN(_ret_ref));
2142
2143 JNI_ENTRY(jstring, jni_NewString(JNIEnv *env, const jchar *unicodeChars, jsize len))
2144 HOTSPOT_JNI_NEWSTRING_ENTRY(env, (uint16_t *) unicodeChars, len);
2145 jstring ret = nullptr;
2146 DT_RETURN_MARK(NewString, jstring, (const jstring&)ret);
2147 oop string=java_lang_String::create_oop_from_unicode((jchar*) unicodeChars, len, CHECK_NULL);
2148 ret = (jstring) JNIHandles::make_local(THREAD, string);
2149 return ret;
2150 JNI_END
2151
2152
2153 JNI_ENTRY_NO_PRESERVE(jsize, jni_GetStringLength(JNIEnv *env, jstring string))
2154 HOTSPOT_JNI_GETSTRINGLENGTH_ENTRY(env, string);
2155 jsize ret = 0;
2156 oop s = JNIHandles::resolve_non_null(string);
2157 ret = java_lang_String::length(s);
2158 HOTSPOT_JNI_GETSTRINGLENGTH_RETURN(ret);
2159 return ret;
2160 JNI_END
2161
2162
2163 JNI_ENTRY_NO_PRESERVE(const jchar*, jni_GetStringChars(
2164 JNIEnv *env, jstring string, jboolean *isCopy))
2165 HOTSPOT_JNI_GETSTRINGCHARS_ENTRY(env, string, (uintptr_t *) isCopy);
2166 jchar* buf = nullptr;
2167 oop s = JNIHandles::resolve_non_null(string);
2168 typeArrayOop s_value = java_lang_String::value(s);
2169 if (s_value != nullptr) {
2170 int s_len = java_lang_String::length(s, s_value);
2171 bool is_latin1 = java_lang_String::is_latin1(s);
2172 buf = NEW_C_HEAP_ARRAY_RETURN_NULL(jchar, s_len + 1, mtInternal); // add one for zero termination
2173 /* JNI Specification states return null on OOM */
2174 if (buf != nullptr) {
2175 if (s_len > 0) {
2176 if (!is_latin1) {
2177 ArrayAccess<>::arraycopy_to_native(s_value, (size_t) typeArrayOopDesc::element_offset<jchar>(0),
2178 buf, s_len);
2179 } else {
2180 for (int i = 0; i < s_len; i++) {
2181 buf[i] = ((jchar) s_value->byte_at(i)) & 0xff;
2182 }
2183 }
2184 }
2185 buf[s_len] = 0;
2186 //%note jni_5
2187 if (isCopy != nullptr) {
2188 *isCopy = JNI_TRUE;
2189 }
2190 }
2191 }
2192 HOTSPOT_JNI_GETSTRINGCHARS_RETURN(buf);
2193 return buf;
2194 JNI_END
2195
2196
2197 JNI_ENTRY_NO_PRESERVE(void, jni_ReleaseStringChars(JNIEnv *env, jstring str, const jchar *chars))
2198 HOTSPOT_JNI_RELEASESTRINGCHARS_ENTRY(env, str, (uint16_t *) chars);
2199 //%note jni_6
2200 if (chars != nullptr) {
2201 // Since String objects are supposed to be immutable, don't copy any
2202 // new data back. A bad user will have to go after the char array.
2203 FreeHeap((void*) chars);
2204 }
2205 HOTSPOT_JNI_RELEASESTRINGCHARS_RETURN();
2206 JNI_END
2207
2208
2209 // UTF Interface
2210
2211 DT_RETURN_MARK_DECL(NewStringUTF, jstring
2212 , HOTSPOT_JNI_NEWSTRINGUTF_RETURN(_ret_ref));
2213
2214 JNI_ENTRY(jstring, jni_NewStringUTF(JNIEnv *env, const char *bytes))
2215 HOTSPOT_JNI_NEWSTRINGUTF_ENTRY(env, (char *) bytes);
2216 jstring ret;
2217 DT_RETURN_MARK(NewStringUTF, jstring, (const jstring&)ret);
2218
2219 oop result = java_lang_String::create_oop_from_str((char*) bytes, CHECK_NULL);
2220 ret = (jstring) JNIHandles::make_local(THREAD, result);
2221 return ret;
2222 JNI_END
2223
2224
2225 JNI_ENTRY(jsize, jni_GetStringUTFLength(JNIEnv *env, jstring string))
2226 HOTSPOT_JNI_GETSTRINGUTFLENGTH_ENTRY(env, string);
2227 oop java_string = JNIHandles::resolve_non_null(string);
2228 jsize ret = java_lang_String::utf8_length_as_int(java_string);
2229 HOTSPOT_JNI_GETSTRINGUTFLENGTH_RETURN(ret);
2230 return ret;
2231 JNI_END
2232
2233 JNI_ENTRY(jlong, jni_GetStringUTFLengthAsLong(JNIEnv *env, jstring string))
2234 HOTSPOT_JNI_GETSTRINGUTFLENGTHASLONG_ENTRY(env, string);
2235 oop java_string = JNIHandles::resolve_non_null(string);
2236 size_t ret = java_lang_String::utf8_length(java_string);
2237 HOTSPOT_JNI_GETSTRINGUTFLENGTHASLONG_RETURN(ret);
2238 return checked_cast<jlong>(ret);
2239 JNI_END
2240
2241
2242 JNI_ENTRY(const char*, jni_GetStringUTFChars(JNIEnv *env, jstring string, jboolean *isCopy))
2243 HOTSPOT_JNI_GETSTRINGUTFCHARS_ENTRY(env, string, (uintptr_t *) isCopy);
2244 char* result = nullptr;
2245 oop java_string = JNIHandles::resolve_non_null(string);
2246 typeArrayOop s_value = java_lang_String::value(java_string);
2247 if (s_value != nullptr) {
2248 size_t length = java_lang_String::utf8_length(java_string, s_value);
2249 // JNI Specification states return null on OOM.
2250 // The resulting sequence doesn't have to be NUL-terminated but we do.
2251 result = AllocateHeap(length + 1, mtInternal, AllocFailStrategy::RETURN_NULL);
2252 if (result != nullptr) {
2253 java_lang_String::as_utf8_string(java_string, s_value, result, length + 1);
2254 if (isCopy != nullptr) {
2255 *isCopy = JNI_TRUE;
2256 }
2257 }
2258 }
2259 HOTSPOT_JNI_GETSTRINGUTFCHARS_RETURN(result);
2260 return result;
2261 JNI_END
2262
2263
2264 JNI_LEAF(void, jni_ReleaseStringUTFChars(JNIEnv *env, jstring str, const char *chars))
2265 HOTSPOT_JNI_RELEASESTRINGUTFCHARS_ENTRY(env, str, (char *) chars);
2266 if (chars != nullptr) {
2267 FreeHeap((char*) chars);
2268 }
2269 HOTSPOT_JNI_RELEASESTRINGUTFCHARS_RETURN();
2270 JNI_END
2271
2272
2273 JNI_ENTRY_NO_PRESERVE(jsize, jni_GetArrayLength(JNIEnv *env, jarray array))
2274 HOTSPOT_JNI_GETARRAYLENGTH_ENTRY(env, array);
2275 arrayOop a = arrayOop(JNIHandles::resolve_non_null(array));
2276 assert(a->is_array(), "must be array");
2277 jsize ret = a->length();
2278 HOTSPOT_JNI_GETARRAYLENGTH_RETURN(ret);
2279 return ret;
2280 JNI_END
2281
2282
2283 //
2284 // Object Array Operations
2285 //
2286
2287 DT_RETURN_MARK_DECL(NewObjectArray, jobjectArray
2288 , HOTSPOT_JNI_NEWOBJECTARRAY_RETURN(_ret_ref));
2289
2290 JNI_ENTRY(jobjectArray, jni_NewObjectArray(JNIEnv *env, jsize length, jclass elementClass, jobject initialElement))
2291 HOTSPOT_JNI_NEWOBJECTARRAY_ENTRY(env, length, elementClass, initialElement);
2292 jobjectArray ret = nullptr;
2293 DT_RETURN_MARK(NewObjectArray, jobjectArray, (const jobjectArray&)ret);
2294 Klass* ek = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(elementClass));
2295 Klass* ak = ek->array_klass(CHECK_NULL);
2296 ObjArrayKlass::cast(ak)->initialize(CHECK_NULL);
2297 objArrayOop result = ObjArrayKlass::cast(ak)->allocate(length, CHECK_NULL);
2298 oop initial_value = JNIHandles::resolve(initialElement);
2299 if (initial_value != nullptr) { // array already initialized with null
2300 for (int index = 0; index < length; index++) {
2301 result->obj_at_put(index, initial_value);
2302 }
2303 }
2304 ret = (jobjectArray) JNIHandles::make_local(THREAD, result);
2305 return ret;
2306 JNI_END
2307
2308 DT_RETURN_MARK_DECL(GetObjectArrayElement, jobject
2309 , HOTSPOT_JNI_GETOBJECTARRAYELEMENT_RETURN(_ret_ref));
2310
2311 JNI_ENTRY(jobject, jni_GetObjectArrayElement(JNIEnv *env, jobjectArray array, jsize index))
2312 HOTSPOT_JNI_GETOBJECTARRAYELEMENT_ENTRY(env, array, index);
2313 jobject ret = nullptr;
2314 DT_RETURN_MARK(GetObjectArrayElement, jobject, (const jobject&)ret);
2315 objArrayOop a = objArrayOop(JNIHandles::resolve_non_null(array));
2316 if (a->is_within_bounds(index)) {
2317 ret = JNIHandles::make_local(THREAD, a->obj_at(index));
2318 return ret;
2319 } else {
2320 ResourceMark rm(THREAD);
2321 stringStream ss;
2322 ss.print("Index %d out of bounds for length %d", index, a->length());
2323 THROW_MSG_NULL(vmSymbols::java_lang_ArrayIndexOutOfBoundsException(), ss.as_string());
2324 }
2325 JNI_END
2326
2327 DT_VOID_RETURN_MARK_DECL(SetObjectArrayElement
2328 , HOTSPOT_JNI_SETOBJECTARRAYELEMENT_RETURN());
2329
2330 JNI_ENTRY(void, jni_SetObjectArrayElement(JNIEnv *env, jobjectArray array, jsize index, jobject value))
2331 HOTSPOT_JNI_SETOBJECTARRAYELEMENT_ENTRY(env, array, index, value);
2332 DT_VOID_RETURN_MARK(SetObjectArrayElement);
2333
2334 objArrayOop a = objArrayOop(JNIHandles::resolve_non_null(array));
2335 oop v = JNIHandles::resolve(value);
2336 if (a->is_within_bounds(index)) {
2337 if (v == nullptr || v->is_a(ObjArrayKlass::cast(a->klass())->element_klass())) {
2338 a->obj_at_put(index, v);
2339 } else {
2340 ResourceMark rm(THREAD);
2341 stringStream ss;
2342 Klass *bottom_kl = ObjArrayKlass::cast(a->klass())->bottom_klass();
2343 ss.print("type mismatch: can not store %s to %s[%d]",
2344 v->klass()->external_name(),
2345 bottom_kl->is_typeArray_klass() ? type2name_tab[ArrayKlass::cast(bottom_kl)->element_type()] : bottom_kl->external_name(),
2346 index);
2347 for (int dims = ArrayKlass::cast(a->klass())->dimension(); dims > 1; --dims) {
2348 ss.print("[]");
2349 }
2350 THROW_MSG(vmSymbols::java_lang_ArrayStoreException(), ss.as_string());
2351 }
2352 } else {
2353 ResourceMark rm(THREAD);
2354 stringStream ss;
2355 ss.print("Index %d out of bounds for length %d", index, a->length());
2356 THROW_MSG(vmSymbols::java_lang_ArrayIndexOutOfBoundsException(), ss.as_string());
2357 }
2358 JNI_END
2359
2360
2361
2362 #define DEFINE_NEWSCALARARRAY(Return,Allocator,Result \
2363 ,EntryProbe,ReturnProbe) \
2364 \
2365 DT_RETURN_MARK_DECL(New##Result##Array, Return \
2366 , ReturnProbe); \
2367 \
2368 JNI_ENTRY(Return, \
2369 jni_New##Result##Array(JNIEnv *env, jsize len)) \
2370 EntryProbe; \
2371 Return ret = nullptr;\
2372 DT_RETURN_MARK(New##Result##Array, Return, (const Return&)ret);\
2373 \
2374 oop obj= oopFactory::Allocator(len, CHECK_NULL); \
2375 ret = (Return) JNIHandles::make_local(THREAD, obj); \
2376 return ret;\
2377 JNI_END
2378
2379 DEFINE_NEWSCALARARRAY(jbooleanArray, new_boolArray, Boolean,
2380 HOTSPOT_JNI_NEWBOOLEANARRAY_ENTRY(env, len),
2381 HOTSPOT_JNI_NEWBOOLEANARRAY_RETURN(_ret_ref))
2382 DEFINE_NEWSCALARARRAY(jbyteArray, new_byteArray, Byte,
2383 HOTSPOT_JNI_NEWBYTEARRAY_ENTRY(env, len),
2384 HOTSPOT_JNI_NEWBYTEARRAY_RETURN(_ret_ref))
2385 DEFINE_NEWSCALARARRAY(jshortArray, new_shortArray, Short,
2386 HOTSPOT_JNI_NEWSHORTARRAY_ENTRY(env, len),
2387 HOTSPOT_JNI_NEWSHORTARRAY_RETURN(_ret_ref))
2388 DEFINE_NEWSCALARARRAY(jcharArray, new_charArray, Char,
2389 HOTSPOT_JNI_NEWCHARARRAY_ENTRY(env, len),
2390 HOTSPOT_JNI_NEWCHARARRAY_RETURN(_ret_ref))
2391 DEFINE_NEWSCALARARRAY(jintArray, new_intArray, Int,
2392 HOTSPOT_JNI_NEWINTARRAY_ENTRY(env, len),
2393 HOTSPOT_JNI_NEWINTARRAY_RETURN(_ret_ref))
2394 DEFINE_NEWSCALARARRAY(jlongArray, new_longArray, Long,
2395 HOTSPOT_JNI_NEWLONGARRAY_ENTRY(env, len),
2396 HOTSPOT_JNI_NEWLONGARRAY_RETURN(_ret_ref))
2397 DEFINE_NEWSCALARARRAY(jfloatArray, new_floatArray, Float,
2398 HOTSPOT_JNI_NEWFLOATARRAY_ENTRY(env, len),
2399 HOTSPOT_JNI_NEWFLOATARRAY_RETURN(_ret_ref))
2400 DEFINE_NEWSCALARARRAY(jdoubleArray, new_doubleArray, Double,
2401 HOTSPOT_JNI_NEWDOUBLEARRAY_ENTRY(env, len),
2402 HOTSPOT_JNI_NEWDOUBLEARRAY_RETURN(_ret_ref))
2403
2404 // Return an address which will fault if the caller writes to it.
2405
2406 static char* get_bad_address() {
2407 static char* bad_address = nullptr;
2408 if (bad_address == nullptr) {
2409 size_t size = os::vm_allocation_granularity();
2410 bad_address = os::reserve_memory(size);
2411 if (bad_address != nullptr) {
2412 os::protect_memory(bad_address, size, os::MEM_PROT_READ,
2413 /*is_committed*/false);
2414 MemTracker::record_virtual_memory_tag((void*)bad_address, mtInternal);
2415 }
2416 }
2417 return bad_address;
2418 }
2419
2420
2421
2422 #define DEFINE_GETSCALARARRAYELEMENTS(ElementTag,ElementType,Result, Tag \
2423 , EntryProbe, ReturnProbe) \
2424 \
2425 JNI_ENTRY_NO_PRESERVE(ElementType*, \
2426 jni_Get##Result##ArrayElements(JNIEnv *env, ElementType##Array array, jboolean *isCopy)) \
2427 EntryProbe; \
2428 /* allocate an chunk of memory in c land */ \
2429 typeArrayOop a = typeArrayOop(JNIHandles::resolve_non_null(array)); \
2430 ElementType* result; \
2431 int len = a->length(); \
2432 if (len == 0) { \
2433 if (isCopy != nullptr) { \
2434 *isCopy = JNI_FALSE; \
2435 } \
2436 /* Empty array: legal but useless, can't return null. \
2437 * Return a pointer to something useless. \
2438 * Avoid asserts in typeArrayOop. */ \
2439 result = (ElementType*)get_bad_address(); \
2440 } else { \
2441 /* JNI Specification states return null on OOM */ \
2442 result = NEW_C_HEAP_ARRAY_RETURN_NULL(ElementType, len, mtInternal); \
2443 if (result != nullptr) { \
2444 /* copy the array to the c chunk */ \
2445 ArrayAccess<>::arraycopy_to_native(a, typeArrayOopDesc::element_offset<ElementType>(0), \
2446 result, len); \
2447 if (isCopy) { \
2448 *isCopy = JNI_TRUE; \
2449 } \
2450 } \
2451 } \
2452 ReturnProbe; \
2453 return result; \
2454 JNI_END
2455
2456 DEFINE_GETSCALARARRAYELEMENTS(T_BOOLEAN, jboolean, Boolean, bool
2457 , HOTSPOT_JNI_GETBOOLEANARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy),
2458 HOTSPOT_JNI_GETBOOLEANARRAYELEMENTS_RETURN((uintptr_t*)result))
2459 DEFINE_GETSCALARARRAYELEMENTS(T_BYTE, jbyte, Byte, byte
2460 , HOTSPOT_JNI_GETBYTEARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy),
2461 HOTSPOT_JNI_GETBYTEARRAYELEMENTS_RETURN((char*)result))
2462 DEFINE_GETSCALARARRAYELEMENTS(T_SHORT, jshort, Short, short
2463 , HOTSPOT_JNI_GETSHORTARRAYELEMENTS_ENTRY(env, (uint16_t*) array, (uintptr_t *) isCopy),
2464 HOTSPOT_JNI_GETSHORTARRAYELEMENTS_RETURN((uint16_t*)result))
2465 DEFINE_GETSCALARARRAYELEMENTS(T_CHAR, jchar, Char, char
2466 , HOTSPOT_JNI_GETCHARARRAYELEMENTS_ENTRY(env, (uint16_t*) array, (uintptr_t *) isCopy),
2467 HOTSPOT_JNI_GETCHARARRAYELEMENTS_RETURN(result))
2468 DEFINE_GETSCALARARRAYELEMENTS(T_INT, jint, Int, int
2469 , HOTSPOT_JNI_GETINTARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy),
2470 HOTSPOT_JNI_GETINTARRAYELEMENTS_RETURN((uint32_t*)result))
2471 DEFINE_GETSCALARARRAYELEMENTS(T_LONG, jlong, Long, long
2472 , HOTSPOT_JNI_GETLONGARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy),
2473 HOTSPOT_JNI_GETLONGARRAYELEMENTS_RETURN(((uintptr_t*)result)))
2474 // Float and double probes don't return value because dtrace doesn't currently support it
2475 DEFINE_GETSCALARARRAYELEMENTS(T_FLOAT, jfloat, Float, float
2476 , HOTSPOT_JNI_GETFLOATARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy),
2477 HOTSPOT_JNI_GETFLOATARRAYELEMENTS_RETURN(result))
2478 DEFINE_GETSCALARARRAYELEMENTS(T_DOUBLE, jdouble, Double, double
2479 , HOTSPOT_JNI_GETDOUBLEARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy),
2480 HOTSPOT_JNI_GETDOUBLEARRAYELEMENTS_RETURN(result))
2481
2482
2483 #define DEFINE_RELEASESCALARARRAYELEMENTS(ElementTag,ElementType,Result,Tag \
2484 , EntryProbe, ReturnProbe);\
2485 \
2486 JNI_ENTRY_NO_PRESERVE(void, \
2487 jni_Release##Result##ArrayElements(JNIEnv *env, ElementType##Array array, \
2488 ElementType *buf, jint mode)) \
2489 EntryProbe; \
2490 typeArrayOop a = typeArrayOop(JNIHandles::resolve_non_null(array)); \
2491 int len = a->length(); \
2492 if (len != 0) { /* Empty array: nothing to free or copy. */ \
2493 if ((mode == 0) || (mode == JNI_COMMIT)) { \
2494 ArrayAccess<>::arraycopy_from_native(buf, a, typeArrayOopDesc::element_offset<ElementType>(0), len); \
2495 } \
2496 if ((mode == 0) || (mode == JNI_ABORT)) { \
2497 FreeHeap(buf); \
2498 } \
2499 } \
2500 ReturnProbe; \
2501 JNI_END
2502
2503 DEFINE_RELEASESCALARARRAYELEMENTS(T_BOOLEAN, jboolean, Boolean, bool
2504 , HOTSPOT_JNI_RELEASEBOOLEANARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) buf, mode),
2505 HOTSPOT_JNI_RELEASEBOOLEANARRAYELEMENTS_RETURN())
2506 DEFINE_RELEASESCALARARRAYELEMENTS(T_BYTE, jbyte, Byte, byte
2507 , HOTSPOT_JNI_RELEASEBYTEARRAYELEMENTS_ENTRY(env, array, (char *) buf, mode),
2508 HOTSPOT_JNI_RELEASEBYTEARRAYELEMENTS_RETURN())
2509 DEFINE_RELEASESCALARARRAYELEMENTS(T_SHORT, jshort, Short, short
2510 , HOTSPOT_JNI_RELEASESHORTARRAYELEMENTS_ENTRY(env, array, (uint16_t *) buf, mode),
2511 HOTSPOT_JNI_RELEASESHORTARRAYELEMENTS_RETURN())
2512 DEFINE_RELEASESCALARARRAYELEMENTS(T_CHAR, jchar, Char, char
2513 , HOTSPOT_JNI_RELEASECHARARRAYELEMENTS_ENTRY(env, array, (uint16_t *) buf, mode),
2514 HOTSPOT_JNI_RELEASECHARARRAYELEMENTS_RETURN())
2515 DEFINE_RELEASESCALARARRAYELEMENTS(T_INT, jint, Int, int
2516 , HOTSPOT_JNI_RELEASEINTARRAYELEMENTS_ENTRY(env, array, (uint32_t *) buf, mode),
2517 HOTSPOT_JNI_RELEASEINTARRAYELEMENTS_RETURN())
2518 DEFINE_RELEASESCALARARRAYELEMENTS(T_LONG, jlong, Long, long
2519 , HOTSPOT_JNI_RELEASELONGARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) buf, mode),
2520 HOTSPOT_JNI_RELEASELONGARRAYELEMENTS_RETURN())
2521 DEFINE_RELEASESCALARARRAYELEMENTS(T_FLOAT, jfloat, Float, float
2522 , HOTSPOT_JNI_RELEASEFLOATARRAYELEMENTS_ENTRY(env, array, (float *) buf, mode),
2523 HOTSPOT_JNI_RELEASEFLOATARRAYELEMENTS_RETURN())
2524 DEFINE_RELEASESCALARARRAYELEMENTS(T_DOUBLE, jdouble, Double, double
2525 , HOTSPOT_JNI_RELEASEDOUBLEARRAYELEMENTS_ENTRY(env, array, (double *) buf, mode),
2526 HOTSPOT_JNI_RELEASEDOUBLEARRAYELEMENTS_RETURN())
2527
2528 static void check_bounds(jsize start, jsize copy_len, jsize array_len, TRAPS) {
2529 ResourceMark rm(THREAD);
2530 if (copy_len < 0) {
2531 stringStream ss;
2532 ss.print("Length %d is negative", copy_len);
2533 THROW_MSG(vmSymbols::java_lang_ArrayIndexOutOfBoundsException(), ss.as_string());
2534 } else if (start < 0 || (start > array_len - copy_len)) {
2535 stringStream ss;
2536 ss.print("Array region %d.." INT64_FORMAT " out of bounds for length %d",
2537 start, (int64_t)start+(int64_t)copy_len, array_len);
2538 THROW_MSG(vmSymbols::java_lang_ArrayIndexOutOfBoundsException(), ss.as_string());
2539 }
2540 }
2541
2542 #define DEFINE_GETSCALARARRAYREGION(ElementTag,ElementType,Result, Tag \
2543 , EntryProbe, ReturnProbe); \
2544 DT_VOID_RETURN_MARK_DECL(Get##Result##ArrayRegion \
2545 , ReturnProbe); \
2546 \
2547 JNI_ENTRY(void, \
2548 jni_Get##Result##ArrayRegion(JNIEnv *env, ElementType##Array array, jsize start, \
2549 jsize len, ElementType *buf)) \
2550 EntryProbe; \
2551 DT_VOID_RETURN_MARK(Get##Result##ArrayRegion); \
2552 typeArrayOop src = typeArrayOop(JNIHandles::resolve_non_null(array)); \
2553 check_bounds(start, len, src->length(), CHECK); \
2554 if (len > 0) { \
2555 ArrayAccess<>::arraycopy_to_native(src, typeArrayOopDesc::element_offset<ElementType>(start), buf, len); \
2556 } \
2557 JNI_END
2558
2559 DEFINE_GETSCALARARRAYREGION(T_BOOLEAN, jboolean,Boolean, bool
2560 , HOTSPOT_JNI_GETBOOLEANARRAYREGION_ENTRY(env, array, start, len, (uintptr_t *) buf),
2561 HOTSPOT_JNI_GETBOOLEANARRAYREGION_RETURN());
2562 DEFINE_GETSCALARARRAYREGION(T_BYTE, jbyte, Byte, byte
2563 , HOTSPOT_JNI_GETBYTEARRAYREGION_ENTRY(env, array, start, len, (char *) buf),
2564 HOTSPOT_JNI_GETBYTEARRAYREGION_RETURN());
2565 DEFINE_GETSCALARARRAYREGION(T_SHORT, jshort, Short, short
2566 , HOTSPOT_JNI_GETSHORTARRAYREGION_ENTRY(env, array, start, len, (uint16_t *) buf),
2567 HOTSPOT_JNI_GETSHORTARRAYREGION_RETURN());
2568 DEFINE_GETSCALARARRAYREGION(T_CHAR, jchar, Char, char
2569 , HOTSPOT_JNI_GETCHARARRAYREGION_ENTRY(env, array, start, len, (uint16_t*) buf),
2570 HOTSPOT_JNI_GETCHARARRAYREGION_RETURN());
2571 DEFINE_GETSCALARARRAYREGION(T_INT, jint, Int, int
2572 , HOTSPOT_JNI_GETINTARRAYREGION_ENTRY(env, array, start, len, (uint32_t*) buf),
2573 HOTSPOT_JNI_GETINTARRAYREGION_RETURN());
2574 DEFINE_GETSCALARARRAYREGION(T_LONG, jlong, Long, long
2575 , HOTSPOT_JNI_GETLONGARRAYREGION_ENTRY(env, array, start, len, (uintptr_t *) buf),
2576 HOTSPOT_JNI_GETLONGARRAYREGION_RETURN());
2577 DEFINE_GETSCALARARRAYREGION(T_FLOAT, jfloat, Float, float
2578 , HOTSPOT_JNI_GETFLOATARRAYREGION_ENTRY(env, array, start, len, (float *) buf),
2579 HOTSPOT_JNI_GETFLOATARRAYREGION_RETURN());
2580 DEFINE_GETSCALARARRAYREGION(T_DOUBLE, jdouble, Double, double
2581 , HOTSPOT_JNI_GETDOUBLEARRAYREGION_ENTRY(env, array, start, len, (double *) buf),
2582 HOTSPOT_JNI_GETDOUBLEARRAYREGION_RETURN());
2583
2584
2585 #define DEFINE_SETSCALARARRAYREGION(ElementTag,ElementType,Result, Tag \
2586 , EntryProbe, ReturnProbe); \
2587 DT_VOID_RETURN_MARK_DECL(Set##Result##ArrayRegion \
2588 ,ReturnProbe); \
2589 \
2590 JNI_ENTRY(void, \
2591 jni_Set##Result##ArrayRegion(JNIEnv *env, ElementType##Array array, jsize start, \
2592 jsize len, const ElementType *buf)) \
2593 EntryProbe; \
2594 DT_VOID_RETURN_MARK(Set##Result##ArrayRegion); \
2595 typeArrayOop dst = typeArrayOop(JNIHandles::resolve_non_null(array)); \
2596 check_bounds(start, len, dst->length(), CHECK); \
2597 if (len > 0) { \
2598 ArrayAccess<>::arraycopy_from_native(buf, dst, typeArrayOopDesc::element_offset<ElementType>(start), len); \
2599 } \
2600 JNI_END
2601
2602 DEFINE_SETSCALARARRAYREGION(T_BOOLEAN, jboolean, Boolean, bool
2603 , HOTSPOT_JNI_SETBOOLEANARRAYREGION_ENTRY(env, array, start, len, (uintptr_t *)buf),
2604 HOTSPOT_JNI_SETBOOLEANARRAYREGION_RETURN())
2605 DEFINE_SETSCALARARRAYREGION(T_BYTE, jbyte, Byte, byte
2606 , HOTSPOT_JNI_SETBYTEARRAYREGION_ENTRY(env, array, start, len, (char *) buf),
2607 HOTSPOT_JNI_SETBYTEARRAYREGION_RETURN())
2608 DEFINE_SETSCALARARRAYREGION(T_SHORT, jshort, Short, short
2609 , HOTSPOT_JNI_SETSHORTARRAYREGION_ENTRY(env, array, start, len, (uint16_t *) buf),
2610 HOTSPOT_JNI_SETSHORTARRAYREGION_RETURN())
2611 DEFINE_SETSCALARARRAYREGION(T_CHAR, jchar, Char, char
2612 , HOTSPOT_JNI_SETCHARARRAYREGION_ENTRY(env, array, start, len, (uint16_t *) buf),
2613 HOTSPOT_JNI_SETCHARARRAYREGION_RETURN())
2614 DEFINE_SETSCALARARRAYREGION(T_INT, jint, Int, int
2615 , HOTSPOT_JNI_SETINTARRAYREGION_ENTRY(env, array, start, len, (uint32_t *) buf),
2616 HOTSPOT_JNI_SETINTARRAYREGION_RETURN())
2617 DEFINE_SETSCALARARRAYREGION(T_LONG, jlong, Long, long
2618 , HOTSPOT_JNI_SETLONGARRAYREGION_ENTRY(env, array, start, len, (uintptr_t *) buf),
2619 HOTSPOT_JNI_SETLONGARRAYREGION_RETURN())
2620 DEFINE_SETSCALARARRAYREGION(T_FLOAT, jfloat, Float, float
2621 , HOTSPOT_JNI_SETFLOATARRAYREGION_ENTRY(env, array, start, len, (float *) buf),
2622 HOTSPOT_JNI_SETFLOATARRAYREGION_RETURN())
2623 DEFINE_SETSCALARARRAYREGION(T_DOUBLE, jdouble, Double, double
2624 , HOTSPOT_JNI_SETDOUBLEARRAYREGION_ENTRY(env, array, start, len, (double *) buf),
2625 HOTSPOT_JNI_SETDOUBLEARRAYREGION_RETURN())
2626
2627
2628 DT_RETURN_MARK_DECL(RegisterNatives, jint
2629 , HOTSPOT_JNI_REGISTERNATIVES_RETURN(_ret_ref));
2630
2631 JNI_ENTRY(jint, jni_RegisterNatives(JNIEnv *env, jclass clazz,
2632 const JNINativeMethod *methods,
2633 jint nMethods))
2634 HOTSPOT_JNI_REGISTERNATIVES_ENTRY(env, clazz, (void *) methods, nMethods);
2635 jint ret = 0;
2636 DT_RETURN_MARK(RegisterNatives, jint, (const jint&)ret);
2637
2638 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz));
2639
2640 // There are no restrictions on native code registering native methods,
2641 // which allows agents to redefine the bindings to native methods, however
2642 // we issue a warning if any code running outside of the boot/platform
2643 // loader is rebinding any native methods in classes loaded by the
2644 // boot/platform loader that are in named modules. That will catch changes
2645 // to platform classes while excluding classes added to the bootclasspath.
2646 bool do_warning = false;
2647
2648 // Only instanceKlasses can have native methods
2649 if (k->is_instance_klass()) {
2650 oop cl = k->class_loader();
2651 InstanceKlass* ik = InstanceKlass::cast(k);
2652 // Check for a platform class
2653 if ((cl == nullptr || SystemDictionary::is_platform_class_loader(cl)) &&
2654 ik->module()->is_named()) {
2655 Klass* caller = thread->security_get_caller_class(1);
2656 // If no caller class, or caller class has a different loader, then
2657 // issue a warning below.
2658 do_warning = (caller == nullptr) || caller->class_loader() != cl;
2659 }
2660 }
2661
2662
2663 for (int index = 0; index < nMethods; index++) {
2664 const char* meth_name = methods[index].name;
2665 const char* meth_sig = methods[index].signature;
2666 int meth_name_len = (int)strlen(meth_name);
2667
2668 // The class should have been loaded (we have an instance of the class
2669 // passed in) so the method and signature should already be in the symbol
2670 // table. If they're not there, the method doesn't exist.
2671 TempNewSymbol name = SymbolTable::probe(meth_name, meth_name_len);
2672 TempNewSymbol signature = SymbolTable::probe(meth_sig, (int)strlen(meth_sig));
2673
2674 if (name == nullptr || signature == nullptr) {
2675 ResourceMark rm(THREAD);
2676 stringStream st;
2677 st.print("Method %s.%s%s not found", k->external_name(), meth_name, meth_sig);
2678 // Must return negative value on failure
2679 THROW_MSG_(vmSymbols::java_lang_NoSuchMethodError(), st.as_string(), -1);
2680 }
2681
2682 if (do_warning) {
2683 ResourceMark rm(THREAD);
2684 log_warning(jni, resolve)("Re-registering of platform native method: %s.%s%s "
2685 "from code in a different classloader", k->external_name(), meth_name, meth_sig);
2686 }
2687
2688 bool res = Method::register_native(k, name, signature,
2689 (address) methods[index].fnPtr, THREAD);
2690 if (!res) {
2691 ret = -1;
2692 break;
2693 }
2694 }
2695 return ret;
2696 JNI_END
2697
2698
2699 JNI_ENTRY(jint, jni_UnregisterNatives(JNIEnv *env, jclass clazz))
2700 HOTSPOT_JNI_UNREGISTERNATIVES_ENTRY(env, clazz);
2701 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz));
2702 //%note jni_2
2703 if (k->is_instance_klass()) {
2704 for (int index = 0; index < InstanceKlass::cast(k)->methods()->length(); index++) {
2705 Method* m = InstanceKlass::cast(k)->methods()->at(index);
2706 if (m->is_native()) {
2707 m->clear_native_function();
2708 m->set_signature_handler(nullptr);
2709 }
2710 }
2711 }
2712 HOTSPOT_JNI_UNREGISTERNATIVES_RETURN(0);
2713 return 0;
2714 JNI_END
2715
2716 //
2717 // Monitor functions
2718 //
2719
2720 DT_RETURN_MARK_DECL(MonitorEnter, jint
2721 , HOTSPOT_JNI_MONITORENTER_RETURN(_ret_ref));
2722
2723 JNI_ENTRY(jint, jni_MonitorEnter(JNIEnv *env, jobject jobj))
2724 HOTSPOT_JNI_MONITORENTER_ENTRY(env, jobj);
2725 jint ret = JNI_ERR;
2726 DT_RETURN_MARK(MonitorEnter, jint, (const jint&)ret);
2727
2728 // If the object is null, we can't do anything with it
2729 if (jobj == nullptr) {
2730 THROW_(vmSymbols::java_lang_NullPointerException(), JNI_ERR);
2731 }
2732
2733 Handle obj(thread, JNIHandles::resolve_non_null(jobj));
2734 ObjectSynchronizer::jni_enter(obj, thread);
2735 return JNI_OK;
2736 JNI_END
2737
2738 DT_RETURN_MARK_DECL(MonitorExit, jint
2739 , HOTSPOT_JNI_MONITOREXIT_RETURN(_ret_ref));
2740
2741 JNI_ENTRY(jint, jni_MonitorExit(JNIEnv *env, jobject jobj))
2742 HOTSPOT_JNI_MONITOREXIT_ENTRY(env, jobj);
2743 jint ret = JNI_ERR;
2744 DT_RETURN_MARK(MonitorExit, jint, (const jint&)ret);
2745
2746 // Don't do anything with a null object
2747 if (jobj == nullptr) {
2748 THROW_(vmSymbols::java_lang_NullPointerException(), JNI_ERR);
2749 }
2750
2751 Handle obj(THREAD, JNIHandles::resolve_non_null(jobj));
2752 ObjectSynchronizer::jni_exit(obj(), CHECK_(JNI_ERR));
2753 return JNI_OK;
2754 JNI_END
2755
2756 //
2757 // Extensions
2758 //
2759
2760 DT_VOID_RETURN_MARK_DECL(GetStringRegion
2761 , HOTSPOT_JNI_GETSTRINGREGION_RETURN());
2762
2763 JNI_ENTRY(void, jni_GetStringRegion(JNIEnv *env, jstring string, jsize start, jsize len, jchar *buf))
2764 HOTSPOT_JNI_GETSTRINGREGION_ENTRY(env, string, start, len, buf);
2765 DT_VOID_RETURN_MARK(GetStringRegion);
2766 oop s = JNIHandles::resolve_non_null(string);
2767 typeArrayOop s_value = java_lang_String::value(s);
2768 int s_len = java_lang_String::length(s, s_value);
2769 if (start < 0 || len < 0 || start > s_len - len) {
2770 THROW(vmSymbols::java_lang_StringIndexOutOfBoundsException());
2771 } else {
2772 if (len > 0) {
2773 bool is_latin1 = java_lang_String::is_latin1(s);
2774 if (!is_latin1) {
2775 ArrayAccess<>::arraycopy_to_native(s_value, typeArrayOopDesc::element_offset<jchar>(start),
2776 buf, len);
2777 } else {
2778 for (int i = 0; i < len; i++) {
2779 buf[i] = ((jchar) s_value->byte_at(i + start)) & 0xff;
2780 }
2781 }
2782 }
2783 }
2784 JNI_END
2785
2786 DT_VOID_RETURN_MARK_DECL(GetStringUTFRegion
2787 , HOTSPOT_JNI_GETSTRINGUTFREGION_RETURN());
2788
2789 JNI_ENTRY(void, jni_GetStringUTFRegion(JNIEnv *env, jstring string, jsize start, jsize len, char *buf))
2790 HOTSPOT_JNI_GETSTRINGUTFREGION_ENTRY(env, string, start, len, buf);
2791 DT_VOID_RETURN_MARK(GetStringUTFRegion);
2792 oop s = JNIHandles::resolve_non_null(string);
2793 typeArrayOop s_value = java_lang_String::value(s);
2794 int s_len = java_lang_String::length(s, s_value);
2795 if (start < 0 || len < 0 || start > s_len - len) {
2796 THROW(vmSymbols::java_lang_StringIndexOutOfBoundsException());
2797 } else {
2798 //%note jni_7
2799 if (len > 0) {
2800 // Assume the buffer is large enough as the JNI spec. does not require user error checking
2801 java_lang_String::as_utf8_string(s, s_value, start, len, buf, INT_MAX);
2802 // as_utf8_string null-terminates the result string
2803 } else {
2804 // JDK null-terminates the buffer even in len is zero
2805 if (buf != nullptr) {
2806 buf[0] = 0;
2807 }
2808 }
2809 }
2810 JNI_END
2811
2812 JNI_ENTRY(void*, jni_GetPrimitiveArrayCritical(JNIEnv *env, jarray array, jboolean *isCopy))
2813 HOTSPOT_JNI_GETPRIMITIVEARRAYCRITICAL_ENTRY(env, array, (uintptr_t *) isCopy);
2814 Handle a(thread, JNIHandles::resolve_non_null(array));
2815 assert(a->is_typeArray(), "just checking");
2816
2817 // Pin object
2818 Universe::heap()->pin_object(thread, a());
2819
2820 BasicType type = TypeArrayKlass::cast(a->klass())->element_type();
2821 void* ret = arrayOop(a())->base(type);
2822 if (isCopy != nullptr) {
2823 *isCopy = JNI_FALSE;
2824 }
2825 HOTSPOT_JNI_GETPRIMITIVEARRAYCRITICAL_RETURN(ret);
2826 return ret;
2827 JNI_END
2828
2829
2830 JNI_ENTRY(void, jni_ReleasePrimitiveArrayCritical(JNIEnv *env, jarray array, void *carray, jint mode))
2831 HOTSPOT_JNI_RELEASEPRIMITIVEARRAYCRITICAL_ENTRY(env, array, carray, mode);
2832 // Unpin object
2833 Universe::heap()->unpin_object(thread, JNIHandles::resolve_non_null(array));
2834 HOTSPOT_JNI_RELEASEPRIMITIVEARRAYCRITICAL_RETURN();
2835 JNI_END
2836
2837
2838 JNI_ENTRY(const jchar*, jni_GetStringCritical(JNIEnv *env, jstring string, jboolean *isCopy))
2839 HOTSPOT_JNI_GETSTRINGCRITICAL_ENTRY(env, string, (uintptr_t *) isCopy);
2840 oop s = JNIHandles::resolve_non_null(string);
2841 jchar* ret;
2842 if (!java_lang_String::is_latin1(s)) {
2843 typeArrayHandle s_value(thread, java_lang_String::value(s));
2844
2845 // Pin value array
2846 Universe::heap()->pin_object(thread, s_value());
2847
2848 ret = (jchar*) s_value->base(T_CHAR);
2849 if (isCopy != nullptr) *isCopy = JNI_FALSE;
2850 } else {
2851 // Inflate latin1 encoded string to UTF16
2852 typeArrayOop s_value = java_lang_String::value(s);
2853 int s_len = java_lang_String::length(s, s_value);
2854 ret = NEW_C_HEAP_ARRAY_RETURN_NULL(jchar, s_len + 1, mtInternal); // add one for zero termination
2855 /* JNI Specification states return null on OOM */
2856 if (ret != nullptr) {
2857 for (int i = 0; i < s_len; i++) {
2858 ret[i] = ((jchar) s_value->byte_at(i)) & 0xff;
2859 }
2860 ret[s_len] = 0;
2861 }
2862 if (isCopy != nullptr) *isCopy = JNI_TRUE;
2863 }
2864 HOTSPOT_JNI_GETSTRINGCRITICAL_RETURN((uint16_t *) ret);
2865 return ret;
2866 JNI_END
2867
2868
2869 JNI_ENTRY(void, jni_ReleaseStringCritical(JNIEnv *env, jstring str, const jchar *chars))
2870 HOTSPOT_JNI_RELEASESTRINGCRITICAL_ENTRY(env, str, (uint16_t *) chars);
2871 oop s = JNIHandles::resolve_non_null(str);
2872 bool is_latin1 = java_lang_String::is_latin1(s);
2873
2874 if (is_latin1) {
2875 // For latin1 string, free jchar array allocated by earlier call to GetStringCritical.
2876 // This assumes that ReleaseStringCritical bookends GetStringCritical.
2877 FREE_C_HEAP_ARRAY(jchar, chars);
2878 } else {
2879 // StringDedup can have replaced the value array, so don't fetch the array from 's'.
2880 // Instead, we calculate the address based on the jchar array exposed with GetStringCritical.
2881 oop value = cast_to_oop((address)chars - arrayOopDesc::base_offset_in_bytes(T_CHAR));
2882
2883 // Unpin value array
2884 Universe::heap()->unpin_object(thread, value);
2885 }
2886 HOTSPOT_JNI_RELEASESTRINGCRITICAL_RETURN();
2887 JNI_END
2888
2889
2890 JNI_ENTRY(jweak, jni_NewWeakGlobalRef(JNIEnv *env, jobject ref))
2891 HOTSPOT_JNI_NEWWEAKGLOBALREF_ENTRY(env, ref);
2892 Handle ref_handle(thread, JNIHandles::resolve(ref));
2893 jweak ret = JNIHandles::make_weak_global(ref_handle, AllocFailStrategy::RETURN_NULL);
2894 if (ret == nullptr && ref_handle.not_null()) {
2895 THROW_OOP_(Universe::out_of_memory_error_c_heap(), nullptr);
2896 }
2897 HOTSPOT_JNI_NEWWEAKGLOBALREF_RETURN(ret);
2898 return ret;
2899 JNI_END
2900
2901 // Must be JNI_ENTRY (with HandleMark)
2902 JNI_ENTRY(void, jni_DeleteWeakGlobalRef(JNIEnv *env, jweak ref))
2903 HOTSPOT_JNI_DELETEWEAKGLOBALREF_ENTRY(env, ref);
2904 JNIHandles::destroy_weak_global(ref);
2905 HOTSPOT_JNI_DELETEWEAKGLOBALREF_RETURN();
2906 JNI_END
2907
2908
2909 JNI_ENTRY_NO_PRESERVE(jboolean, jni_ExceptionCheck(JNIEnv *env))
2910 HOTSPOT_JNI_EXCEPTIONCHECK_ENTRY(env);
2911 jni_check_async_exceptions(thread);
2912 jboolean ret = (thread->has_pending_exception()) ? JNI_TRUE : JNI_FALSE;
2913 HOTSPOT_JNI_EXCEPTIONCHECK_RETURN(ret);
2914 return ret;
2915 JNI_END
2916
2917
2918 // Initialization state for three routines below relating to
2919 // java.nio.DirectBuffers
2920 static int directBufferSupportInitializeStarted = 0;
2921 static volatile int directBufferSupportInitializeEnded = 0;
2922 static volatile int directBufferSupportInitializeFailed = 0;
2923 static jclass bufferClass = nullptr;
2924 static jclass directBufferClass = nullptr;
2925 static jclass directByteBufferClass = nullptr;
2926 static jmethodID directByteBufferConstructor = nullptr;
2927 static jfieldID directBufferAddressField = nullptr;
2928 static jfieldID bufferCapacityField = nullptr;
2929
2930 static jclass lookupOne(JNIEnv* env, const char* name, TRAPS) {
2931 Handle loader; // null (bootstrap) loader
2932 Handle protection_domain; // null protection domain
2933
2934 TempNewSymbol sym = SymbolTable::new_symbol(name);
2935 jclass result = find_class_from_class_loader(env, sym, true, loader, protection_domain, true, CHECK_NULL);
2936
2937 if (log_is_enabled(Debug, class, resolve) && result != nullptr) {
2938 trace_class_resolution(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(result)));
2939 }
2940 return result;
2941 }
2942
2943 // These lookups are done with the null (bootstrap) ClassLoader to
2944 // circumvent any security checks that would be done by jni_FindClass.
2945 JNI_ENTRY(bool, lookupDirectBufferClasses(JNIEnv* env))
2946 {
2947 if ((bufferClass = lookupOne(env, "java/nio/Buffer", thread)) == nullptr) { return false; }
2948 if ((directBufferClass = lookupOne(env, "sun/nio/ch/DirectBuffer", thread)) == nullptr) { return false; }
2949 if ((directByteBufferClass = lookupOne(env, "java/nio/DirectByteBuffer", thread)) == nullptr) { return false; }
2950 return true;
2951 }
2952 JNI_END
2953
2954
2955 static bool initializeDirectBufferSupport(JNIEnv* env, JavaThread* thread) {
2956 if (directBufferSupportInitializeFailed) {
2957 return false;
2958 }
2959
2960 if (Atomic::cmpxchg(&directBufferSupportInitializeStarted, 0, 1) == 0) {
2961 if (!lookupDirectBufferClasses(env)) {
2962 directBufferSupportInitializeFailed = 1;
2963 return false;
2964 }
2965
2966 // Make global references for these
2967 bufferClass = (jclass) env->NewGlobalRef(bufferClass);
2968 directBufferClass = (jclass) env->NewGlobalRef(directBufferClass);
2969 directByteBufferClass = (jclass) env->NewGlobalRef(directByteBufferClass);
2970
2971 // Global refs will be null if out-of-memory (no exception is pending)
2972 if (bufferClass == nullptr || directBufferClass == nullptr || directByteBufferClass == nullptr) {
2973 directBufferSupportInitializeFailed = 1;
2974 return false;
2975 }
2976
2977 // Get needed field and method IDs
2978 directByteBufferConstructor = env->GetMethodID(directByteBufferClass, "<init>", "(JJ)V");
2979 if (env->ExceptionCheck()) {
2980 env->ExceptionClear();
2981 directBufferSupportInitializeFailed = 1;
2982 return false;
2983 }
2984 directBufferAddressField = env->GetFieldID(bufferClass, "address", "J");
2985 if (env->ExceptionCheck()) {
2986 env->ExceptionClear();
2987 directBufferSupportInitializeFailed = 1;
2988 return false;
2989 }
2990 bufferCapacityField = env->GetFieldID(bufferClass, "capacity", "I");
2991 if (env->ExceptionCheck()) {
2992 env->ExceptionClear();
2993 directBufferSupportInitializeFailed = 1;
2994 return false;
2995 }
2996
2997 if ((directByteBufferConstructor == nullptr) ||
2998 (directBufferAddressField == nullptr) ||
2999 (bufferCapacityField == nullptr)) {
3000 directBufferSupportInitializeFailed = 1;
3001 return false;
3002 }
3003
3004 directBufferSupportInitializeEnded = 1;
3005 } else {
3006 while (!directBufferSupportInitializeEnded && !directBufferSupportInitializeFailed) {
3007 os::naked_yield();
3008 }
3009 }
3010
3011 return !directBufferSupportInitializeFailed;
3012 }
3013
3014 extern "C" jobject JNICALL jni_NewDirectByteBuffer(JNIEnv *env, void* address, jlong capacity)
3015 {
3016 // thread_from_jni_environment() will block if VM is gone.
3017 JavaThread* thread = JavaThread::thread_from_jni_environment(env);
3018
3019 HOTSPOT_JNI_NEWDIRECTBYTEBUFFER_ENTRY(env, address, capacity);
3020
3021 if (!directBufferSupportInitializeEnded) {
3022 if (!initializeDirectBufferSupport(env, thread)) {
3023 HOTSPOT_JNI_NEWDIRECTBYTEBUFFER_RETURN(nullptr);
3024 return nullptr;
3025 }
3026 }
3027
3028 // Being paranoid about accidental sign extension on address
3029 jlong addr = (jlong) ((uintptr_t) address);
3030 jobject ret = env->NewObject(directByteBufferClass, directByteBufferConstructor, addr, capacity);
3031 HOTSPOT_JNI_NEWDIRECTBYTEBUFFER_RETURN(ret);
3032 return ret;
3033 }
3034
3035 DT_RETURN_MARK_DECL(GetDirectBufferAddress, void*
3036 , HOTSPOT_JNI_GETDIRECTBUFFERADDRESS_RETURN((void*) _ret_ref));
3037
3038 extern "C" void* JNICALL jni_GetDirectBufferAddress(JNIEnv *env, jobject buf)
3039 {
3040 // thread_from_jni_environment() will block if VM is gone.
3041 JavaThread* thread = JavaThread::thread_from_jni_environment(env);
3042
3043 HOTSPOT_JNI_GETDIRECTBUFFERADDRESS_ENTRY(env, buf);
3044 void* ret = nullptr;
3045 DT_RETURN_MARK(GetDirectBufferAddress, void*, (const void*&)ret);
3046
3047 if (!directBufferSupportInitializeEnded) {
3048 if (!initializeDirectBufferSupport(env, thread)) {
3049 return nullptr;
3050 }
3051 }
3052
3053 if ((buf != nullptr) && (!env->IsInstanceOf(buf, directBufferClass))) {
3054 return nullptr;
3055 }
3056
3057 ret = (void*)(intptr_t)env->GetLongField(buf, directBufferAddressField);
3058 return ret;
3059 }
3060
3061 DT_RETURN_MARK_DECL(GetDirectBufferCapacity, jlong
3062 , HOTSPOT_JNI_GETDIRECTBUFFERCAPACITY_RETURN(_ret_ref));
3063
3064 extern "C" jlong JNICALL jni_GetDirectBufferCapacity(JNIEnv *env, jobject buf)
3065 {
3066 // thread_from_jni_environment() will block if VM is gone.
3067 JavaThread* thread = JavaThread::thread_from_jni_environment(env);
3068
3069 HOTSPOT_JNI_GETDIRECTBUFFERCAPACITY_ENTRY(env, buf);
3070 jlong ret = -1;
3071 DT_RETURN_MARK(GetDirectBufferCapacity, jlong, (const jlong&)ret);
3072
3073 if (!directBufferSupportInitializeEnded) {
3074 if (!initializeDirectBufferSupport(env, thread)) {
3075 ret = 0;
3076 return ret;
3077 }
3078 }
3079
3080 if (buf == nullptr) {
3081 return -1;
3082 }
3083
3084 if (!env->IsInstanceOf(buf, directBufferClass)) {
3085 return -1;
3086 }
3087
3088 // NOTE that capacity is currently an int in the implementation
3089 ret = env->GetIntField(buf, bufferCapacityField);
3090 return ret;
3091 }
3092
3093
3094 JNI_LEAF(jint, jni_GetVersion(JNIEnv *env))
3095 HOTSPOT_JNI_GETVERSION_ENTRY(env);
3096 HOTSPOT_JNI_GETVERSION_RETURN(CurrentVersion);
3097 return CurrentVersion;
3098 JNI_END
3099
3100 extern struct JavaVM_ main_vm;
3101
3102 JNI_LEAF(jint, jni_GetJavaVM(JNIEnv *env, JavaVM **vm))
3103 HOTSPOT_JNI_GETJAVAVM_ENTRY(env, (void **) vm);
3104 *vm = (JavaVM *)(&main_vm);
3105 HOTSPOT_JNI_GETJAVAVM_RETURN(JNI_OK);
3106 return JNI_OK;
3107 JNI_END
3108
3109
3110 JNI_ENTRY(jobject, jni_GetModule(JNIEnv* env, jclass clazz))
3111 return Modules::get_module(clazz, THREAD);
3112 JNI_END
3113
3114 JNI_ENTRY(jboolean, jni_IsVirtualThread(JNIEnv* env, jobject obj))
3115 oop thread_obj = JNIHandles::resolve_external_guard(obj);
3116 if (thread_obj != nullptr && thread_obj->is_a(vmClasses::BaseVirtualThread_klass())) {
3117 return JNI_TRUE;
3118 } else {
3119 return JNI_FALSE;
3120 }
3121 JNI_END
3122
3123
3124 // Structure containing all jni functions
3125 struct JNINativeInterface_ jni_NativeInterface = {
3126 nullptr,
3127 nullptr,
3128 nullptr,
3129
3130 nullptr,
3131
3132 jni_GetVersion,
3133
3134 jni_DefineClass,
3135 jni_FindClass,
3136
3137 jni_FromReflectedMethod,
3138 jni_FromReflectedField,
3139
3140 jni_ToReflectedMethod,
3141
3142 jni_GetSuperclass,
3143 jni_IsAssignableFrom,
3144
3145 jni_ToReflectedField,
3146
3147 jni_Throw,
3148 jni_ThrowNew,
3149 jni_ExceptionOccurred,
3150 jni_ExceptionDescribe,
3151 jni_ExceptionClear,
3152 jni_FatalError,
3153
3154 jni_PushLocalFrame,
3155 jni_PopLocalFrame,
3156
3157 jni_NewGlobalRef,
3158 jni_DeleteGlobalRef,
3159 jni_DeleteLocalRef,
3160 jni_IsSameObject,
3161
3162 jni_NewLocalRef,
3163 jni_EnsureLocalCapacity,
3164
3165 jni_AllocObject,
3166 jni_NewObject,
3167 jni_NewObjectV,
3168 jni_NewObjectA,
3169
3170 jni_GetObjectClass,
3171 jni_IsInstanceOf,
3172
3173 jni_GetMethodID,
3174
3175 jni_CallObjectMethod,
3176 jni_CallObjectMethodV,
3177 jni_CallObjectMethodA,
3178 jni_CallBooleanMethod,
3179 jni_CallBooleanMethodV,
3180 jni_CallBooleanMethodA,
3181 jni_CallByteMethod,
3182 jni_CallByteMethodV,
3183 jni_CallByteMethodA,
3184 jni_CallCharMethod,
3185 jni_CallCharMethodV,
3186 jni_CallCharMethodA,
3187 jni_CallShortMethod,
3188 jni_CallShortMethodV,
3189 jni_CallShortMethodA,
3190 jni_CallIntMethod,
3191 jni_CallIntMethodV,
3192 jni_CallIntMethodA,
3193 jni_CallLongMethod,
3194 jni_CallLongMethodV,
3195 jni_CallLongMethodA,
3196 jni_CallFloatMethod,
3197 jni_CallFloatMethodV,
3198 jni_CallFloatMethodA,
3199 jni_CallDoubleMethod,
3200 jni_CallDoubleMethodV,
3201 jni_CallDoubleMethodA,
3202 jni_CallVoidMethod,
3203 jni_CallVoidMethodV,
3204 jni_CallVoidMethodA,
3205
3206 jni_CallNonvirtualObjectMethod,
3207 jni_CallNonvirtualObjectMethodV,
3208 jni_CallNonvirtualObjectMethodA,
3209 jni_CallNonvirtualBooleanMethod,
3210 jni_CallNonvirtualBooleanMethodV,
3211 jni_CallNonvirtualBooleanMethodA,
3212 jni_CallNonvirtualByteMethod,
3213 jni_CallNonvirtualByteMethodV,
3214 jni_CallNonvirtualByteMethodA,
3215 jni_CallNonvirtualCharMethod,
3216 jni_CallNonvirtualCharMethodV,
3217 jni_CallNonvirtualCharMethodA,
3218 jni_CallNonvirtualShortMethod,
3219 jni_CallNonvirtualShortMethodV,
3220 jni_CallNonvirtualShortMethodA,
3221 jni_CallNonvirtualIntMethod,
3222 jni_CallNonvirtualIntMethodV,
3223 jni_CallNonvirtualIntMethodA,
3224 jni_CallNonvirtualLongMethod,
3225 jni_CallNonvirtualLongMethodV,
3226 jni_CallNonvirtualLongMethodA,
3227 jni_CallNonvirtualFloatMethod,
3228 jni_CallNonvirtualFloatMethodV,
3229 jni_CallNonvirtualFloatMethodA,
3230 jni_CallNonvirtualDoubleMethod,
3231 jni_CallNonvirtualDoubleMethodV,
3232 jni_CallNonvirtualDoubleMethodA,
3233 jni_CallNonvirtualVoidMethod,
3234 jni_CallNonvirtualVoidMethodV,
3235 jni_CallNonvirtualVoidMethodA,
3236
3237 jni_GetFieldID,
3238
3239 jni_GetObjectField,
3240 jni_GetBooleanField,
3241 jni_GetByteField,
3242 jni_GetCharField,
3243 jni_GetShortField,
3244 jni_GetIntField,
3245 jni_GetLongField,
3246 jni_GetFloatField,
3247 jni_GetDoubleField,
3248
3249 jni_SetObjectField,
3250 jni_SetBooleanField,
3251 jni_SetByteField,
3252 jni_SetCharField,
3253 jni_SetShortField,
3254 jni_SetIntField,
3255 jni_SetLongField,
3256 jni_SetFloatField,
3257 jni_SetDoubleField,
3258
3259 jni_GetStaticMethodID,
3260
3261 jni_CallStaticObjectMethod,
3262 jni_CallStaticObjectMethodV,
3263 jni_CallStaticObjectMethodA,
3264 jni_CallStaticBooleanMethod,
3265 jni_CallStaticBooleanMethodV,
3266 jni_CallStaticBooleanMethodA,
3267 jni_CallStaticByteMethod,
3268 jni_CallStaticByteMethodV,
3269 jni_CallStaticByteMethodA,
3270 jni_CallStaticCharMethod,
3271 jni_CallStaticCharMethodV,
3272 jni_CallStaticCharMethodA,
3273 jni_CallStaticShortMethod,
3274 jni_CallStaticShortMethodV,
3275 jni_CallStaticShortMethodA,
3276 jni_CallStaticIntMethod,
3277 jni_CallStaticIntMethodV,
3278 jni_CallStaticIntMethodA,
3279 jni_CallStaticLongMethod,
3280 jni_CallStaticLongMethodV,
3281 jni_CallStaticLongMethodA,
3282 jni_CallStaticFloatMethod,
3283 jni_CallStaticFloatMethodV,
3284 jni_CallStaticFloatMethodA,
3285 jni_CallStaticDoubleMethod,
3286 jni_CallStaticDoubleMethodV,
3287 jni_CallStaticDoubleMethodA,
3288 jni_CallStaticVoidMethod,
3289 jni_CallStaticVoidMethodV,
3290 jni_CallStaticVoidMethodA,
3291
3292 jni_GetStaticFieldID,
3293
3294 jni_GetStaticObjectField,
3295 jni_GetStaticBooleanField,
3296 jni_GetStaticByteField,
3297 jni_GetStaticCharField,
3298 jni_GetStaticShortField,
3299 jni_GetStaticIntField,
3300 jni_GetStaticLongField,
3301 jni_GetStaticFloatField,
3302 jni_GetStaticDoubleField,
3303
3304 jni_SetStaticObjectField,
3305 jni_SetStaticBooleanField,
3306 jni_SetStaticByteField,
3307 jni_SetStaticCharField,
3308 jni_SetStaticShortField,
3309 jni_SetStaticIntField,
3310 jni_SetStaticLongField,
3311 jni_SetStaticFloatField,
3312 jni_SetStaticDoubleField,
3313
3314 jni_NewString,
3315 jni_GetStringLength,
3316 jni_GetStringChars,
3317 jni_ReleaseStringChars,
3318
3319 jni_NewStringUTF,
3320 jni_GetStringUTFLength,
3321 jni_GetStringUTFChars,
3322 jni_ReleaseStringUTFChars,
3323
3324 jni_GetArrayLength,
3325
3326 jni_NewObjectArray,
3327 jni_GetObjectArrayElement,
3328 jni_SetObjectArrayElement,
3329
3330 jni_NewBooleanArray,
3331 jni_NewByteArray,
3332 jni_NewCharArray,
3333 jni_NewShortArray,
3334 jni_NewIntArray,
3335 jni_NewLongArray,
3336 jni_NewFloatArray,
3337 jni_NewDoubleArray,
3338
3339 jni_GetBooleanArrayElements,
3340 jni_GetByteArrayElements,
3341 jni_GetCharArrayElements,
3342 jni_GetShortArrayElements,
3343 jni_GetIntArrayElements,
3344 jni_GetLongArrayElements,
3345 jni_GetFloatArrayElements,
3346 jni_GetDoubleArrayElements,
3347
3348 jni_ReleaseBooleanArrayElements,
3349 jni_ReleaseByteArrayElements,
3350 jni_ReleaseCharArrayElements,
3351 jni_ReleaseShortArrayElements,
3352 jni_ReleaseIntArrayElements,
3353 jni_ReleaseLongArrayElements,
3354 jni_ReleaseFloatArrayElements,
3355 jni_ReleaseDoubleArrayElements,
3356
3357 jni_GetBooleanArrayRegion,
3358 jni_GetByteArrayRegion,
3359 jni_GetCharArrayRegion,
3360 jni_GetShortArrayRegion,
3361 jni_GetIntArrayRegion,
3362 jni_GetLongArrayRegion,
3363 jni_GetFloatArrayRegion,
3364 jni_GetDoubleArrayRegion,
3365
3366 jni_SetBooleanArrayRegion,
3367 jni_SetByteArrayRegion,
3368 jni_SetCharArrayRegion,
3369 jni_SetShortArrayRegion,
3370 jni_SetIntArrayRegion,
3371 jni_SetLongArrayRegion,
3372 jni_SetFloatArrayRegion,
3373 jni_SetDoubleArrayRegion,
3374
3375 jni_RegisterNatives,
3376 jni_UnregisterNatives,
3377
3378 jni_MonitorEnter,
3379 jni_MonitorExit,
3380
3381 jni_GetJavaVM,
3382
3383 jni_GetStringRegion,
3384 jni_GetStringUTFRegion,
3385
3386 jni_GetPrimitiveArrayCritical,
3387 jni_ReleasePrimitiveArrayCritical,
3388
3389 jni_GetStringCritical,
3390 jni_ReleaseStringCritical,
3391
3392 jni_NewWeakGlobalRef,
3393 jni_DeleteWeakGlobalRef,
3394
3395 jni_ExceptionCheck,
3396
3397 jni_NewDirectByteBuffer,
3398 jni_GetDirectBufferAddress,
3399 jni_GetDirectBufferCapacity,
3400
3401 // New 1_6 features
3402
3403 jni_GetObjectRefType,
3404
3405 // Module features
3406
3407 jni_GetModule,
3408
3409 // Virtual threads
3410
3411 jni_IsVirtualThread,
3412
3413 // Large UTF8 support
3414
3415 jni_GetStringUTFLengthAsLong
3416 };
3417
3418
3419 // For jvmti use to modify jni function table.
3420 // Java threads in native contiues to run until it is transitioned
3421 // to VM at safepoint. Before the transition or before it is blocked
3422 // for safepoint it may access jni function table. VM could crash if
3423 // any java thread access the jni function table in the middle of memcpy.
3424 // To avoid this each function pointers are copied automically.
3425 void copy_jni_function_table(const struct JNINativeInterface_ *new_jni_NativeInterface) {
3426 assert(SafepointSynchronize::is_at_safepoint(), "must be at safepoint");
3427 intptr_t *a = (intptr_t *) jni_functions();
3428 intptr_t *b = (intptr_t *) new_jni_NativeInterface;
3429 for (uint i=0; i < sizeof(struct JNINativeInterface_)/sizeof(void *); i++) {
3430 Atomic::store(a++, *b++);
3431 }
3432 }
3433
3434 void quicken_jni_functions() {
3435 // Replace Get<Primitive>Field with fast versions
3436 if (UseFastJNIAccessors && !VerifyJNIFields && !CheckJNICalls) {
3437 address func;
3438 func = JNI_FastGetField::generate_fast_get_boolean_field();
3439 if (func != (address)-1) {
3440 jni_NativeInterface.GetBooleanField = (GetBooleanField_t)func;
3441 }
3442 func = JNI_FastGetField::generate_fast_get_byte_field();
3443 if (func != (address)-1) {
3444 jni_NativeInterface.GetByteField = (GetByteField_t)func;
3445 }
3446 func = JNI_FastGetField::generate_fast_get_char_field();
3447 if (func != (address)-1) {
3448 jni_NativeInterface.GetCharField = (GetCharField_t)func;
3449 }
3450 func = JNI_FastGetField::generate_fast_get_short_field();
3451 if (func != (address)-1) {
3452 jni_NativeInterface.GetShortField = (GetShortField_t)func;
3453 }
3454 func = JNI_FastGetField::generate_fast_get_int_field();
3455 if (func != (address)-1) {
3456 jni_NativeInterface.GetIntField = (GetIntField_t)func;
3457 }
3458 func = JNI_FastGetField::generate_fast_get_long_field();
3459 if (func != (address)-1) {
3460 jni_NativeInterface.GetLongField = (GetLongField_t)func;
3461 }
3462 func = JNI_FastGetField::generate_fast_get_float_field();
3463 if (func != (address)-1) {
3464 jni_NativeInterface.GetFloatField = (GetFloatField_t)func;
3465 }
3466 func = JNI_FastGetField::generate_fast_get_double_field();
3467 if (func != (address)-1) {
3468 jni_NativeInterface.GetDoubleField = (GetDoubleField_t)func;
3469 }
3470 }
3471 }
3472
3473 // Returns the function structure
3474 struct JNINativeInterface_* jni_functions() {
3475 #if INCLUDE_JNI_CHECK
3476 if (CheckJNICalls) return jni_functions_check();
3477 #endif // INCLUDE_JNI_CHECK
3478 return &jni_NativeInterface;
3479 }
3480
3481 // Returns the function structure
3482 struct JNINativeInterface_* jni_functions_nocheck() {
3483 return &jni_NativeInterface;
3484 }
3485
3486
3487 // Invocation API
3488
3489
3490 // Forward declaration
3491 extern const struct JNIInvokeInterface_ jni_InvokeInterface;
3492
3493 // Global invocation API vars
3494 enum VM_Creation_State {
3495 NOT_CREATED = 0,
3496 IN_PROGRESS, // Most JNI operations are permitted during this phase to
3497 // allow for initialization actions by libraries and agents.
3498 COMPLETE
3499 };
3500
3501 volatile VM_Creation_State vm_created = NOT_CREATED;
3502
3503 // Indicate whether it is safe to recreate VM. Recreation is only
3504 // possible after a failed initial creation attempt in some cases.
3505 volatile int safe_to_recreate_vm = 1;
3506 struct JavaVM_ main_vm = {&jni_InvokeInterface};
3507
3508
3509 #define JAVASTACKSIZE (400 * 1024) /* Default size of a thread java stack */
3510 enum { VERIFY_NONE, VERIFY_REMOTE, VERIFY_ALL };
3511
3512 DT_RETURN_MARK_DECL(GetDefaultJavaVMInitArgs, jint
3513 , HOTSPOT_JNI_GETDEFAULTJAVAVMINITARGS_RETURN(_ret_ref));
3514
3515 _JNI_IMPORT_OR_EXPORT_ jint JNICALL JNI_GetDefaultJavaVMInitArgs(void *args_) {
3516 HOTSPOT_JNI_GETDEFAULTJAVAVMINITARGS_ENTRY(args_);
3517 JDK1_1InitArgs *args = (JDK1_1InitArgs *)args_;
3518 jint ret = JNI_ERR;
3519 DT_RETURN_MARK(GetDefaultJavaVMInitArgs, jint, (const jint&)ret);
3520
3521 if (Threads::is_supported_jni_version(args->version)) {
3522 ret = JNI_OK;
3523 }
3524 // 1.1 style no longer supported in hotspot.
3525 // According the JNI spec, we should update args->version on return.
3526 // We also use the structure to communicate with launcher about default
3527 // stack size.
3528 if (args->version == JNI_VERSION_1_1) {
3529 args->version = JNI_VERSION_1_2;
3530 // javaStackSize is int in arguments structure
3531 assert(jlong(ThreadStackSize) * K < INT_MAX, "integer overflow");
3532 args->javaStackSize = (jint)(ThreadStackSize * K);
3533 }
3534 return ret;
3535 }
3536
3537 DT_RETURN_MARK_DECL(CreateJavaVM, jint
3538 , HOTSPOT_JNI_CREATEJAVAVM_RETURN(_ret_ref));
3539
3540 static jint JNI_CreateJavaVM_inner(JavaVM **vm, void **penv, void *args) {
3541 HOTSPOT_JNI_CREATEJAVAVM_ENTRY((void **) vm, penv, args);
3542
3543 jint result = JNI_ERR;
3544 DT_RETURN_MARK(CreateJavaVM, jint, (const jint&)result);
3545
3546 // We're about to use Atomic::xchg for synchronization. Some Zero
3547 // platforms use the GCC builtin __sync_lock_test_and_set for this,
3548 // but __sync_lock_test_and_set is not guaranteed to do what we want
3549 // on all architectures. So we check it works before relying on it.
3550 #if defined(ZERO) && defined(ASSERT)
3551 {
3552 jint a = 0xcafebabe;
3553 jint b = Atomic::xchg(&a, (jint) 0xdeadbeef);
3554 void *c = &a;
3555 void *d = Atomic::xchg(&c, &b);
3556 assert(a == (jint) 0xdeadbeef && b == (jint) 0xcafebabe, "Atomic::xchg() works");
3557 assert(c == &b && d == &a, "Atomic::xchg() works");
3558 }
3559 #endif // ZERO && ASSERT
3560
3561 // At the moment it's only possible to have one Java VM,
3562 // since some of the runtime state is in global variables.
3563
3564 // We cannot use our mutex locks here, since they only work on
3565 // Threads. We do an atomic compare and exchange to ensure only
3566 // one thread can call this method at a time
3567
3568 // We use Atomic::xchg rather than Atomic::add/dec since on some platforms
3569 // the add/dec implementations are dependent on whether we are running
3570 // on a multiprocessor Atomic::xchg does not have this problem.
3571 if (Atomic::xchg(&vm_created, IN_PROGRESS) != NOT_CREATED) {
3572 return JNI_EEXIST; // already created, or create attempt in progress
3573 }
3574
3575 // If a previous creation attempt failed but can be retried safely,
3576 // then safe_to_recreate_vm will have been reset to 1 after being
3577 // cleared here. If a previous creation attempt succeeded and we then
3578 // destroyed that VM, we will be prevented from trying to recreate
3579 // the VM in the same process, as the value will still be 0.
3580 if (Atomic::xchg(&safe_to_recreate_vm, 0) == 0) {
3581 return JNI_ERR;
3582 }
3583
3584 /**
3585 * Certain errors during initialization are recoverable and do not
3586 * prevent this method from being called again at a later time
3587 * (perhaps with different arguments). However, at a certain
3588 * point during initialization if an error occurs we cannot allow
3589 * this function to be called again (or it will crash). In those
3590 * situations, the 'canTryAgain' flag is set to false, which atomically
3591 * sets safe_to_recreate_vm to 1, such that any new call to
3592 * JNI_CreateJavaVM will immediately fail using the above logic.
3593 */
3594 bool can_try_again = true;
3595
3596 result = Threads::create_vm((JavaVMInitArgs*) args, &can_try_again);
3597 if (result == JNI_OK) {
3598 JavaThread *thread = JavaThread::current();
3599 assert(!thread->has_pending_exception(), "should have returned not OK");
3600 // thread is thread_in_vm here
3601 *vm = (JavaVM *)(&main_vm);
3602 *(JNIEnv**)penv = thread->jni_environment();
3603 // mark creation complete for other JNI ops
3604 Atomic::release_store(&vm_created, COMPLETE);
3605
3606 #if INCLUDE_JVMCI
3607 if (EnableJVMCI) {
3608 if (UseJVMCICompiler) {
3609 // JVMCI is initialized on a CompilerThread
3610 if (BootstrapJVMCI) {
3611 JavaThread* THREAD = thread; // For exception macros.
3612 JVMCICompiler* compiler = JVMCICompiler::instance(true, CATCH);
3613 compiler->bootstrap(THREAD);
3614 if (HAS_PENDING_EXCEPTION) {
3615 HandleMark hm(THREAD);
3616 vm_exit_during_initialization(Handle(THREAD, PENDING_EXCEPTION));
3617 }
3618 }
3619 }
3620 }
3621 #endif
3622
3623 // Notify JVMTI
3624 if (JvmtiExport::should_post_thread_life()) {
3625 JvmtiExport::post_thread_start(thread);
3626 }
3627
3628 JFR_ONLY(Jfr::on_thread_start(thread);)
3629
3630 if (ReplayCompiles) ciReplay::replay(thread);
3631
3632 #ifdef ASSERT
3633 // Some platforms (like Win*) need a wrapper around these test
3634 // functions in order to properly handle error conditions.
3635 if (ErrorHandlerTest != 0) {
3636 VMError::controlled_crash(ErrorHandlerTest);
3637 }
3638 #endif
3639
3640 // Since this is not a JVM_ENTRY we have to set the thread state manually before leaving.
3641 ThreadStateTransition::transition_from_vm(thread, _thread_in_native);
3642 MACOS_AARCH64_ONLY(thread->enable_wx(WXExec));
3643 } else {
3644 // If create_vm exits because of a pending exception, exit with that
3645 // exception. In the future when we figure out how to reclaim memory,
3646 // we may be able to exit with JNI_ERR and allow the calling application
3647 // to continue.
3648 if (Universe::is_fully_initialized()) {
3649 // otherwise no pending exception possible - VM will already have aborted
3650 Thread* current = Thread::current_or_null();
3651 if (current != nullptr) {
3652 JavaThread* THREAD = JavaThread::cast(current); // For exception macros.
3653 assert(HAS_PENDING_EXCEPTION, "must be - else no current thread exists");
3654 HandleMark hm(THREAD);
3655 vm_exit_during_initialization(Handle(THREAD, PENDING_EXCEPTION));
3656 }
3657 }
3658
3659 if (can_try_again) {
3660 // reset safe_to_recreate_vm to 1 so that retrial would be possible
3661 safe_to_recreate_vm = 1;
3662 }
3663
3664 // Creation failed. We must reset vm_created
3665 *vm = nullptr;
3666 *(JNIEnv**)penv = nullptr;
3667 // reset vm_created last to avoid race condition. Use OrderAccess to
3668 // control both compiler and architectural-based reordering.
3669 assert(vm_created == IN_PROGRESS, "must be");
3670 Atomic::release_store(&vm_created, NOT_CREATED);
3671 }
3672
3673 // Flush stdout and stderr before exit.
3674 fflush(stdout);
3675 fflush(stderr);
3676
3677 return result;
3678
3679 }
3680
3681 _JNI_IMPORT_OR_EXPORT_ jint JNICALL JNI_CreateJavaVM(JavaVM **vm, void **penv, void *args) {
3682 jint result = JNI_ERR;
3683 // On Windows, let CreateJavaVM run with SEH protection
3684 #if defined(_WIN32) && !defined(USE_VECTORED_EXCEPTION_HANDLING)
3685 __try {
3686 #endif
3687 result = JNI_CreateJavaVM_inner(vm, penv, args);
3688 #if defined(_WIN32) && !defined(USE_VECTORED_EXCEPTION_HANDLING)
3689 } __except(topLevelExceptionFilter((_EXCEPTION_POINTERS*)_exception_info())) {
3690 // Nothing to do.
3691 }
3692 #endif
3693 return result;
3694 }
3695
3696 _JNI_IMPORT_OR_EXPORT_ jint JNICALL JNI_GetCreatedJavaVMs(JavaVM **vm_buf, jsize bufLen, jsize *numVMs) {
3697 HOTSPOT_JNI_GETCREATEDJAVAVMS_ENTRY((void **) vm_buf, bufLen, (uintptr_t *) numVMs);
3698
3699 if (vm_created == COMPLETE) {
3700 if (numVMs != nullptr) *numVMs = 1;
3701 if (bufLen > 0) *vm_buf = (JavaVM *)(&main_vm);
3702 } else {
3703 if (numVMs != nullptr) *numVMs = 0;
3704 }
3705 HOTSPOT_JNI_GETCREATEDJAVAVMS_RETURN(JNI_OK);
3706 return JNI_OK;
3707 }
3708
3709 extern "C" {
3710
3711 DT_RETURN_MARK_DECL(DestroyJavaVM, jint
3712 , HOTSPOT_JNI_DESTROYJAVAVM_RETURN(_ret_ref));
3713
3714 static jint JNICALL jni_DestroyJavaVM_inner(JavaVM *vm) {
3715 HOTSPOT_JNI_DESTROYJAVAVM_ENTRY(vm);
3716 jint res = JNI_ERR;
3717 DT_RETURN_MARK(DestroyJavaVM, jint, (const jint&)res);
3718
3719 if (vm_created == NOT_CREATED) {
3720 res = JNI_ERR;
3721 return res;
3722 }
3723
3724 JNIEnv *env;
3725 JavaVMAttachArgs destroyargs;
3726 destroyargs.version = CurrentVersion;
3727 destroyargs.name = (char *)"DestroyJavaVM";
3728 destroyargs.group = nullptr;
3729 res = vm->AttachCurrentThread((void **)&env, (void *)&destroyargs);
3730 if (res != JNI_OK) {
3731 return res;
3732 }
3733
3734 JavaThread* thread = JavaThread::current();
3735
3736 // Make sure we are actually in a newly attached thread, with no
3737 // existing Java frame.
3738 if (thread->has_last_Java_frame()) {
3739 return JNI_ERR;
3740 }
3741
3742 // Since this is not a JVM_ENTRY we have to set the thread state manually before entering.
3743
3744 // We are going to VM, change W^X state to the expected one.
3745 MACOS_AARCH64_ONLY(WXMode oldmode = thread->enable_wx(WXWrite));
3746
3747 ThreadStateTransition::transition_from_native(thread, _thread_in_vm);
3748 Threads::destroy_vm();
3749 // Don't bother restoring thread state, VM is gone.
3750 vm_created = NOT_CREATED;
3751 return JNI_OK;
3752 }
3753
3754 jint JNICALL jni_DestroyJavaVM(JavaVM *vm) {
3755 jint result = JNI_ERR;
3756 // On Windows, we need SEH protection
3757 #if defined(_WIN32) && !defined(USE_VECTORED_EXCEPTION_HANDLING)
3758 __try {
3759 #endif
3760 result = jni_DestroyJavaVM_inner(vm);
3761 #if defined(_WIN32) && !defined(USE_VECTORED_EXCEPTION_HANDLING)
3762 } __except(topLevelExceptionFilter((_EXCEPTION_POINTERS*)_exception_info())) {
3763 // Nothing to do.
3764 }
3765 #endif
3766 return result;
3767 }
3768
3769 static jint attach_current_thread(JavaVM *vm, void **penv, void *_args, bool daemon) {
3770 JavaVMAttachArgs *args = (JavaVMAttachArgs *) _args;
3771
3772 // Check below commented out from JDK1.2fcs as well
3773 /*
3774 if (args && (args->version != JNI_VERSION_1_1 || args->version != JNI_VERSION_1_2)) {
3775 return JNI_EVERSION;
3776 }
3777 */
3778
3779 Thread* t = Thread::current_or_null();
3780 if (t != nullptr) {
3781 // If executing from an atexit hook we may be in the VMThread.
3782 if (t->is_Java_thread()) {
3783 // If the thread has been attached this operation is a no-op
3784 *(JNIEnv**)penv = JavaThread::cast(t)->jni_environment();
3785 return JNI_OK;
3786 } else {
3787 return JNI_ERR;
3788 }
3789 }
3790
3791 // Create a thread and mark it as attaching so it will be skipped by the
3792 // ThreadsListEnumerator - see CR 6404306
3793 JavaThread* thread = JavaThread::create_attaching_thread();
3794
3795 // Set correct safepoint info. The thread is going to call into Java when
3796 // initializing the Java level thread object. Hence, the correct state must
3797 // be set in order for the Safepoint code to deal with it correctly.
3798 thread->set_thread_state(_thread_in_vm);
3799 thread->record_stack_base_and_size();
3800 thread->register_thread_stack_with_NMT();
3801 thread->initialize_thread_current();
3802 MACOS_AARCH64_ONLY(thread->init_wx());
3803
3804 if (!os::create_attached_thread(thread)) {
3805 thread->smr_delete();
3806 return JNI_ERR;
3807 }
3808 // Enable stack overflow checks
3809 thread->stack_overflow_state()->create_stack_guard_pages();
3810
3811 thread->initialize_tlab();
3812
3813 thread->cache_global_variables();
3814
3815 // This thread will not do a safepoint check, since it has
3816 // not been added to the Thread list yet.
3817 { MutexLocker ml(Threads_lock);
3818 // This must be inside this lock in order to get FullGCALot to work properly, i.e., to
3819 // avoid this thread trying to do a GC before it is added to the thread-list
3820 thread->set_active_handles(JNIHandleBlock::allocate_block());
3821 Threads::add(thread, daemon);
3822 }
3823 // Create thread group and name info from attach arguments
3824 oop group = nullptr;
3825 char* thread_name = nullptr;
3826 if (args != nullptr && Threads::is_supported_jni_version(args->version)) {
3827 group = JNIHandles::resolve(args->group);
3828 thread_name = args->name; // may be null
3829 }
3830 if (group == nullptr) group = Universe::main_thread_group();
3831
3832 // Create Java level thread object and attach it to this thread
3833 bool attach_failed = false;
3834 {
3835 EXCEPTION_MARK;
3836 HandleMark hm(THREAD);
3837 Handle thread_group(THREAD, group);
3838 thread->allocate_threadObj(thread_group, thread_name, daemon, THREAD);
3839 if (HAS_PENDING_EXCEPTION) {
3840 CLEAR_PENDING_EXCEPTION;
3841 // cleanup outside the handle mark.
3842 attach_failed = true;
3843 }
3844 }
3845
3846 if (attach_failed) {
3847 // Added missing cleanup
3848 thread->cleanup_failed_attach_current_thread(daemon);
3849 return JNI_ERR;
3850 }
3851
3852 // mark the thread as no longer attaching
3853 // this uses a fence to push the change through so we don't have
3854 // to regrab the threads_lock
3855 thread->set_done_attaching_via_jni();
3856
3857 // Set java thread status.
3858 java_lang_Thread::set_thread_status(thread->threadObj(),
3859 JavaThreadStatus::RUNNABLE);
3860
3861 // Notify the debugger
3862 if (JvmtiExport::should_post_thread_life()) {
3863 JvmtiExport::post_thread_start(thread);
3864 }
3865
3866 JFR_ONLY(Jfr::on_thread_start(thread);)
3867
3868 *(JNIEnv**)penv = thread->jni_environment();
3869
3870 // Now leaving the VM, so change thread_state. This is normally automatically taken care
3871 // of in the JVM_ENTRY. But in this situation we have to do it manually.
3872 ThreadStateTransition::transition_from_vm(thread, _thread_in_native);
3873 MACOS_AARCH64_ONLY(thread->enable_wx(WXExec));
3874
3875 // Perform any platform dependent FPU setup
3876 os::setup_fpu();
3877
3878 return JNI_OK;
3879 }
3880
3881
3882 jint JNICALL jni_AttachCurrentThread(JavaVM *vm, void **penv, void *_args) {
3883 HOTSPOT_JNI_ATTACHCURRENTTHREAD_ENTRY(vm, penv, _args);
3884 if (vm_created == NOT_CREATED) {
3885 // Not sure how we could possibly get here.
3886 HOTSPOT_JNI_ATTACHCURRENTTHREAD_RETURN((uint32_t) JNI_ERR);
3887 return JNI_ERR;
3888 }
3889
3890 jint ret = attach_current_thread(vm, penv, _args, false);
3891 HOTSPOT_JNI_ATTACHCURRENTTHREAD_RETURN(ret);
3892 return ret;
3893 }
3894
3895
3896 jint JNICALL jni_DetachCurrentThread(JavaVM *vm) {
3897 HOTSPOT_JNI_DETACHCURRENTTHREAD_ENTRY(vm);
3898 if (vm_created == NOT_CREATED) {
3899 // Not sure how we could possibly get here.
3900 HOTSPOT_JNI_DETACHCURRENTTHREAD_RETURN(JNI_ERR);
3901 return JNI_ERR;
3902 }
3903
3904 Thread* current = Thread::current_or_null();
3905
3906 // If the thread has already been detached the operation is a no-op
3907 if (current == nullptr) {
3908 HOTSPOT_JNI_DETACHCURRENTTHREAD_RETURN(JNI_OK);
3909 return JNI_OK;
3910 }
3911
3912 // If executing from an atexit hook we may be in the VMThread.
3913 if (!current->is_Java_thread()) {
3914 HOTSPOT_JNI_DETACHCURRENTTHREAD_RETURN((uint32_t) JNI_ERR);
3915 return JNI_ERR;
3916 }
3917
3918 VM_Exit::block_if_vm_exited();
3919
3920 JavaThread* thread = JavaThread::cast(current);
3921 if (thread->has_last_Java_frame()) {
3922 HOTSPOT_JNI_DETACHCURRENTTHREAD_RETURN((uint32_t) JNI_ERR);
3923 // Can't detach a thread that's running java, that can't work.
3924 return JNI_ERR;
3925 }
3926
3927 // We are going to VM, change W^X state to the expected one.
3928 MACOS_AARCH64_ONLY(thread->enable_wx(WXWrite));
3929
3930 // Safepoint support. Have to do call-back to safepoint code, if in the
3931 // middle of a safepoint operation
3932 ThreadStateTransition::transition_from_native(thread, _thread_in_vm);
3933
3934 // XXX: Note that JavaThread::exit() call below removes the guards on the
3935 // stack pages set up via enable_stack_{red,yellow}_zone() calls
3936 // above in jni_AttachCurrentThread. Unfortunately, while the setting
3937 // of the guards is visible in jni_AttachCurrentThread above,
3938 // the removal of the guards is buried below in JavaThread::exit()
3939 // here. The abstraction should be more symmetrically either exposed
3940 // or hidden (e.g. it could probably be hidden in the same
3941 // (platform-dependent) methods where we do alternate stack
3942 // maintenance work?)
3943 thread->exit(false, JavaThread::jni_detach);
3944 thread->smr_delete();
3945
3946 // Go to the execute mode, the initial state of the thread on creation.
3947 // Use os interface as the thread is not a JavaThread anymore.
3948 MACOS_AARCH64_ONLY(os::current_thread_enable_wx(WXExec));
3949
3950 HOTSPOT_JNI_DETACHCURRENTTHREAD_RETURN(JNI_OK);
3951 return JNI_OK;
3952 }
3953
3954 DT_RETURN_MARK_DECL(GetEnv, jint
3955 , HOTSPOT_JNI_GETENV_RETURN(_ret_ref));
3956
3957 jint JNICALL jni_GetEnv(JavaVM *vm, void **penv, jint version) {
3958 HOTSPOT_JNI_GETENV_ENTRY(vm, penv, version);
3959 jint ret = JNI_ERR;
3960 DT_RETURN_MARK(GetEnv, jint, (const jint&)ret);
3961
3962 if (vm_created == NOT_CREATED) {
3963 *penv = nullptr;
3964 ret = JNI_EDETACHED;
3965 return ret;
3966 }
3967
3968 if (JniExportedInterface::GetExportedInterface(vm, penv, version, &ret)) {
3969 return ret;
3970 }
3971
3972 #ifndef JVMPI_VERSION_1
3973 // need these in order to be polite about older agents
3974 #define JVMPI_VERSION_1 ((jint)0x10000001)
3975 #define JVMPI_VERSION_1_1 ((jint)0x10000002)
3976 #define JVMPI_VERSION_1_2 ((jint)0x10000003)
3977 #endif // !JVMPI_VERSION_1
3978
3979 Thread* thread = Thread::current_or_null();
3980 if (thread != nullptr && thread->is_Java_thread()) {
3981 if (Threads::is_supported_jni_version_including_1_1(version)) {
3982 *(JNIEnv**)penv = JavaThread::cast(thread)->jni_environment();
3983 ret = JNI_OK;
3984 return ret;
3985
3986 } else if (version == JVMPI_VERSION_1 ||
3987 version == JVMPI_VERSION_1_1 ||
3988 version == JVMPI_VERSION_1_2) {
3989 tty->print_cr("ERROR: JVMPI, an experimental interface, is no longer supported.");
3990 tty->print_cr("Please use the supported interface: the JVM Tool Interface (JVM TI).");
3991 ret = JNI_EVERSION;
3992 return ret;
3993 } else if (JvmtiExport::is_jvmdi_version(version)) {
3994 tty->print_cr("FATAL ERROR: JVMDI is no longer supported.");
3995 tty->print_cr("Please use the supported interface: the JVM Tool Interface (JVM TI).");
3996 ret = JNI_EVERSION;
3997 return ret;
3998 } else {
3999 *penv = nullptr;
4000 ret = JNI_EVERSION;
4001 return ret;
4002 }
4003 } else {
4004 *penv = nullptr;
4005 ret = JNI_EDETACHED;
4006 return ret;
4007 }
4008 }
4009
4010
4011 jint JNICALL jni_AttachCurrentThreadAsDaemon(JavaVM *vm, void **penv, void *_args) {
4012 HOTSPOT_JNI_ATTACHCURRENTTHREADASDAEMON_ENTRY(vm, penv, _args);
4013 if (vm_created == NOT_CREATED) {
4014 // Not sure how we could possibly get here.
4015 HOTSPOT_JNI_ATTACHCURRENTTHREADASDAEMON_RETURN((uint32_t) JNI_ERR);
4016 return JNI_ERR;
4017 }
4018
4019 jint ret = attach_current_thread(vm, penv, _args, true);
4020 HOTSPOT_JNI_ATTACHCURRENTTHREADASDAEMON_RETURN(ret);
4021 return ret;
4022 }
4023
4024
4025 } // End extern "C"
4026
4027 const struct JNIInvokeInterface_ jni_InvokeInterface = {
4028 nullptr,
4029 nullptr,
4030 nullptr,
4031
4032 jni_DestroyJavaVM,
4033 jni_AttachCurrentThread,
4034 jni_DetachCurrentThread,
4035 jni_GetEnv,
4036 jni_AttachCurrentThreadAsDaemon
4037 };