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