1 /*
2 * Copyright (c) 1997, 2025, Oracle and/or its affiliates. All rights reserved.
3 * Copyright (c) 2012, 2024 Red Hat, Inc.
4 * Copyright (c) 2021, Azul Systems, Inc. All rights reserved.
5 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
6 *
7 * This code is free software; you can redistribute it and/or modify it
8 * under the terms of the GNU General Public License version 2 only, as
9 * published by the Free Software Foundation.
10 *
11 * This code is distributed in the hope that it will be useful, but WITHOUT
12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
14 * version 2 for more details (a copy is included in the LICENSE file that
15 * accompanied this code).
16 *
17 * You should have received a copy of the GNU General Public License version
18 * 2 along with this work; if not, write to the Free Software Foundation,
19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20 *
21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
22 * or visit www.oracle.com if you need additional information or have any
23 * questions.
24 *
25 */
26
27 #include "ci/ciReplay.hpp"
28 #include "classfile/altHashing.hpp"
29 #include "classfile/classFileStream.hpp"
30 #include "classfile/classLoader.hpp"
31 #include "classfile/classLoadInfo.hpp"
32 #include "classfile/javaClasses.inline.hpp"
33 #include "classfile/javaThreadStatus.hpp"
34 #include "classfile/moduleEntry.hpp"
35 #include "classfile/modules.hpp"
36 #include "classfile/symbolTable.hpp"
37 #include "classfile/systemDictionary.hpp"
38 #include "classfile/vmClasses.hpp"
39 #include "classfile/vmSymbols.hpp"
40 #include "compiler/compiler_globals.hpp"
41 #include "gc/shared/collectedHeap.hpp"
42 #include "gc/shared/stringdedup/stringDedup.hpp"
43 #include "interpreter/linkResolver.hpp"
44 #include "jni.h"
45 #include "jvm.h"
46 #include "logging/log.hpp"
47 #include "memory/allocation.inline.hpp"
48 #include "memory/oopFactory.hpp"
49 #include "memory/resourceArea.hpp"
50 #include "memory/universe.hpp"
51 #include "nmt/memTracker.hpp"
52 #include "oops/access.inline.hpp"
53 #include "oops/arrayOop.hpp"
54 #include "oops/flatArrayOop.inline.hpp"
55 #include "oops/inlineKlass.inline.hpp"
56 #include "oops/instanceKlass.inline.hpp"
57 #include "oops/instanceOop.hpp"
58 #include "oops/klass.inline.hpp"
59 #include "oops/markWord.hpp"
60 #include "oops/method.hpp"
61 #include "oops/objArrayKlass.hpp"
62 #include "oops/objArrayOop.inline.hpp"
63 #include "oops/oop.inline.hpp"
64 #include "oops/symbol.hpp"
65 #include "oops/typeArrayKlass.hpp"
66 #include "oops/typeArrayOop.inline.hpp"
67 #include "oops/valuePayload.inline.hpp"
68 #include "prims/jniCheck.hpp"
69 #include "prims/jniExport.hpp"
70 #include "prims/jniFastGetField.hpp"
71 #include "prims/jvm_misc.hpp"
72 #include "prims/jvmtiExport.hpp"
73 #include "prims/jvmtiThreadState.hpp"
74 #include "runtime/arguments.hpp"
75 #include "runtime/atomicAccess.hpp"
76 #include "runtime/fieldDescriptor.inline.hpp"
77 #include "runtime/handles.inline.hpp"
78 #include "runtime/interfaceSupport.inline.hpp"
79 #include "runtime/java.hpp"
80 #include "runtime/javaCalls.hpp"
81 #include "runtime/javaThread.inline.hpp"
82 #include "runtime/jfieldIDWorkaround.hpp"
83 #include "runtime/jniHandles.inline.hpp"
84 #include "runtime/reflection.hpp"
85 #include "runtime/safepointVerifiers.hpp"
86 #include "runtime/sharedRuntime.hpp"
87 #include "runtime/signature.hpp"
88 #include "runtime/synchronizer.hpp"
89 #include "runtime/thread.inline.hpp"
90 #include "runtime/vmOperations.hpp"
91 #include "services/runtimeService.hpp"
92 #include "utilities/defaultStream.hpp"
93 #include "utilities/dtrace.hpp"
94 #include "utilities/events.hpp"
95 #include "utilities/macros.hpp"
96 #include "utilities/vmError.hpp"
97 #if INCLUDE_JVMCI
98 #include "jvmci/jvmciCompiler.hpp"
99 #endif
100 #if INCLUDE_JFR
101 #include "jfr/jfr.hpp"
102 #endif
103
104 static jint CurrentVersion = JNI_VERSION_24;
105
106 #if defined(_WIN32) && !defined(USE_VECTORED_EXCEPTION_HANDLING)
107 extern LONG WINAPI topLevelExceptionFilter(_EXCEPTION_POINTERS* );
108 #endif
109
110 // The DT_RETURN_MARK macros create a scoped object to fire the dtrace
111 // '-return' probe regardless of the return path is taken out of the function.
112 // Methods that have multiple return paths use this to avoid having to
113 // instrument each return path. Methods that use CHECK or THROW must use this
114 // since those macros can cause an immediate uninstrumented return.
115 //
116 // In order to get the return value, a reference to the variable containing
117 // the return value must be passed to the constructor of the object, and
118 // the return value must be set before return (since the mark object has
119 // a reference to it).
120 //
121 // Example:
122 // DT_RETURN_MARK_DECL(SomeFunc, int);
123 // JNI_ENTRY(int, SomeFunc, ...)
124 // int return_value = 0;
125 // DT_RETURN_MARK(SomeFunc, int, (const int&)return_value);
126 // foo(CHECK_0)
127 // return_value = 5;
128 // return return_value;
129 // JNI_END
130 #define DT_RETURN_MARK_DECL(name, type, probe) \
131 DTRACE_ONLY( \
132 class DTraceReturnProbeMark_##name { \
133 public: \
134 const type& _ret_ref; \
135 DTraceReturnProbeMark_##name(const type& v) : _ret_ref(v) {} \
136 ~DTraceReturnProbeMark_##name() { \
137 probe; \
138 } \
139 } \
140 )
141 // Void functions are simpler since there's no return value
142 #define DT_VOID_RETURN_MARK_DECL(name, probe) \
143 DTRACE_ONLY( \
144 class DTraceReturnProbeMark_##name { \
145 public: \
146 ~DTraceReturnProbeMark_##name() { \
147 probe; \
148 } \
149 } \
150 )
151
152 // Place these macros in the function to mark the return. Non-void
153 // functions need the type and address of the return value.
154 #define DT_RETURN_MARK(name, type, ref) \
155 DTRACE_ONLY( DTraceReturnProbeMark_##name dtrace_return_mark(ref) )
156 #define DT_VOID_RETURN_MARK(name) \
157 DTRACE_ONLY( DTraceReturnProbeMark_##name dtrace_return_mark )
158
159
160 // Use these to select distinct code for floating-point vs. non-floating point
161 // situations. Used from within common macros where we need slightly
162 // different behavior for Float/Double
163 #define FP_SELECT_Boolean(intcode, fpcode) intcode
164 #define FP_SELECT_Byte(intcode, fpcode) intcode
165 #define FP_SELECT_Char(intcode, fpcode) intcode
166 #define FP_SELECT_Short(intcode, fpcode) intcode
167 #define FP_SELECT_Object(intcode, fpcode) intcode
168 #define FP_SELECT_Int(intcode, fpcode) intcode
169 #define FP_SELECT_Long(intcode, fpcode) intcode
170 #define FP_SELECT_Float(intcode, fpcode) fpcode
171 #define FP_SELECT_Double(intcode, fpcode) fpcode
172 #define FP_SELECT(TypeName, intcode, fpcode) \
173 FP_SELECT_##TypeName(intcode, fpcode)
174
175 // Choose DT_RETURN_MARK macros based on the type: float/double -> void
176 // (dtrace doesn't do FP yet)
177 #define DT_RETURN_MARK_DECL_FOR(TypeName, name, type, probe) \
178 FP_SELECT(TypeName, \
179 DT_RETURN_MARK_DECL(name, type, probe), DT_VOID_RETURN_MARK_DECL(name, probe) )
180 #define DT_RETURN_MARK_FOR(TypeName, name, type, ref) \
181 FP_SELECT(TypeName, \
182 DT_RETURN_MARK(name, type, ref), DT_VOID_RETURN_MARK(name) )
183
184
185 // out-of-line helpers for class jfieldIDWorkaround:
186
187 bool jfieldIDWorkaround::is_valid_jfieldID(Klass* k, jfieldID id) {
188 if (jfieldIDWorkaround::is_instance_jfieldID(k, id)) {
189 uintptr_t as_uint = (uintptr_t) id;
190 int offset = raw_instance_offset(id);
191 if (is_checked_jfieldID(id)) {
192 if (!klass_hash_ok(k, id)) {
193 return false;
194 }
195 }
196 return InstanceKlass::cast(k)->contains_field_offset(offset);
197 } else {
198 JNIid* result = (JNIid*) id;
199 #ifdef ASSERT
200 return result != nullptr && result->is_static_field_id();
201 #else
202 return result != nullptr;
203 #endif
204 }
205 }
206
207
208 intptr_t jfieldIDWorkaround::encode_klass_hash(Klass* k, int offset) {
209 if (offset <= small_offset_mask) {
210 Klass* field_klass = k;
211 Klass* super_klass = field_klass->super();
212 // With compressed oops the most super class with nonstatic fields would
213 // be the owner of fields embedded in the header.
214 while (InstanceKlass::cast(super_klass)->has_nonstatic_fields() &&
215 InstanceKlass::cast(super_klass)->contains_field_offset(offset)) {
216 field_klass = super_klass; // super contains the field also
217 super_klass = field_klass->super();
218 }
219 DEBUG_ONLY(NoSafepointVerifier nosafepoint;)
220 uintptr_t klass_hash = field_klass->identity_hash();
221 return ((klass_hash & klass_mask) << klass_shift) | checked_mask_in_place;
222 } else {
223 #if 0
224 #ifndef PRODUCT
225 {
226 ResourceMark rm;
227 warning("VerifyJNIFields: long offset %d in %s", offset, k->external_name());
228 }
229 #endif
230 #endif
231 return 0;
232 }
233 }
234
235 bool jfieldIDWorkaround::klass_hash_ok(Klass* k, jfieldID id) {
236 uintptr_t as_uint = (uintptr_t) id;
237 intptr_t klass_hash = (as_uint >> klass_shift) & klass_mask;
238 do {
239 DEBUG_ONLY(NoSafepointVerifier nosafepoint;)
240 // Could use a non-blocking query for identity_hash here...
241 if ((k->identity_hash() & klass_mask) == klass_hash)
242 return true;
243 k = k->super();
244 } while (k != nullptr);
245 return false;
246 }
247
248 void jfieldIDWorkaround::verify_instance_jfieldID(Klass* k, jfieldID id) {
249 guarantee(jfieldIDWorkaround::is_instance_jfieldID(k, id), "must be an instance field" );
250 uintptr_t as_uint = (uintptr_t) id;
251 int offset = raw_instance_offset(id);
252 if (VerifyJNIFields) {
253 if (is_checked_jfieldID(id)) {
254 guarantee(klass_hash_ok(k, id),
255 "Bug in native code: jfieldID class must match object");
256 } else {
257 #if 0
258 #ifndef PRODUCT
259 if (Verbose) {
260 ResourceMark rm;
261 warning("VerifyJNIFields: unverified offset %d for %s", offset, k->external_name());
262 }
263 #endif
264 #endif
265 }
266 }
267 guarantee(InstanceKlass::cast(k)->contains_field_offset(offset),
268 "Bug in native code: jfieldID offset must address interior of object");
269 }
270
271 // Implementation of JNI entries
272
273 DT_RETURN_MARK_DECL(DefineClass, jclass
274 , HOTSPOT_JNI_DEFINECLASS_RETURN(_ret_ref));
275
276 JNI_ENTRY(jclass, jni_DefineClass(JNIEnv *env, const char *name, jobject loaderRef,
277 const jbyte *buf, jsize bufLen))
278 HOTSPOT_JNI_DEFINECLASS_ENTRY(
279 env, (char*) name, loaderRef, (char*) buf, bufLen);
280
281 jclass cls = nullptr;
282 DT_RETURN_MARK(DefineClass, jclass, (const jclass&)cls);
283
284 // Class resolution will get the class name from the .class stream if the name is null.
285 TempNewSymbol class_name = name == nullptr ? nullptr :
286 SystemDictionary::class_name_symbol(name, vmSymbols::java_lang_NoClassDefFoundError(),
287 CHECK_NULL);
288
289 ResourceMark rm(THREAD);
290 ClassFileStream st((u1*)buf, bufLen, nullptr);
291 Handle class_loader (THREAD, JNIHandles::resolve(loaderRef));
292 Handle protection_domain;
293 ClassLoadInfo cl_info(protection_domain);
294 Klass* k = SystemDictionary::resolve_from_stream(&st, class_name,
295 class_loader,
296 cl_info,
297 CHECK_NULL);
298
299 if (log_is_enabled(Debug, class, resolve)) {
300 trace_class_resolution(k);
301 }
302
303 cls = (jclass)JNIHandles::make_local(THREAD, k->java_mirror());
304 return cls;
305 JNI_END
306
307
308
309 DT_RETURN_MARK_DECL(FindClass, jclass
310 , HOTSPOT_JNI_FINDCLASS_RETURN(_ret_ref));
311
312 JNI_ENTRY(jclass, jni_FindClass(JNIEnv *env, const char *name))
313 HOTSPOT_JNI_FINDCLASS_ENTRY(env, (char *)name);
314
315 jclass result = nullptr;
316 DT_RETURN_MARK(FindClass, jclass, (const jclass&)result);
317
318 // This should be ClassNotFoundException imo.
319 TempNewSymbol class_name =
320 SystemDictionary::class_name_symbol(name, vmSymbols::java_lang_NoClassDefFoundError(),
321 CHECK_NULL);
322
323 // Find calling class
324 Klass* k = thread->security_get_caller_class(0);
325 // default to the system loader when no context
326 Handle loader(THREAD, SystemDictionary::java_system_loader());
327 if (k != nullptr) {
328 // Special handling to make sure JNI_OnLoad and JNI_OnUnload are executed
329 // in the correct class context.
330 if (k->class_loader() == nullptr &&
331 k->name() == vmSymbols::jdk_internal_loader_NativeLibraries()) {
332 JavaValue result(T_OBJECT);
333 JavaCalls::call_static(&result, k,
334 vmSymbols::getFromClass_name(),
335 vmSymbols::void_class_signature(),
336 CHECK_NULL);
337 // When invoked from JNI_OnLoad, NativeLibraries::getFromClass returns
338 // a non-null Class object. When invoked from JNI_OnUnload,
339 // it will return null to indicate no context.
340 oop mirror = result.get_oop();
341 if (mirror != nullptr) {
342 Klass* fromClass = java_lang_Class::as_Klass(mirror);
343 loader = Handle(THREAD, fromClass->class_loader());
344 }
345 } else {
346 loader = Handle(THREAD, k->class_loader());
347 }
348 }
349
350 result = find_class_from_class_loader(env, class_name, true, loader, true, thread);
351
352 if (log_is_enabled(Debug, class, resolve) && result != nullptr) {
353 trace_class_resolution(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(result)));
354 }
355
356 return result;
357 JNI_END
358
359 DT_RETURN_MARK_DECL(FromReflectedMethod, jmethodID
360 , HOTSPOT_JNI_FROMREFLECTEDMETHOD_RETURN((uintptr_t)_ret_ref));
361
362 JNI_ENTRY(jmethodID, jni_FromReflectedMethod(JNIEnv *env, jobject method))
363 HOTSPOT_JNI_FROMREFLECTEDMETHOD_ENTRY(env, method);
364
365 jmethodID ret = nullptr;
366 DT_RETURN_MARK(FromReflectedMethod, jmethodID, (const jmethodID&)ret);
367
368 // method is a handle to a java.lang.reflect.Method object
369 oop reflected = JNIHandles::resolve_non_null(method);
370 oop mirror = nullptr;
371 int slot = 0;
372
373 if (reflected->klass() == vmClasses::reflect_Constructor_klass()) {
374 mirror = java_lang_reflect_Constructor::clazz(reflected);
375 slot = java_lang_reflect_Constructor::slot(reflected);
376 } else {
377 assert(reflected->klass() == vmClasses::reflect_Method_klass(), "wrong type");
378 mirror = java_lang_reflect_Method::clazz(reflected);
379 slot = java_lang_reflect_Method::slot(reflected);
380 }
381 Klass* k1 = java_lang_Class::as_Klass(mirror);
382
383 // Make sure class is initialized before handing id's out to methods
384 k1->initialize(CHECK_NULL);
385 Method* m = InstanceKlass::cast(k1)->method_with_idnum(slot);
386 ret = m==nullptr? nullptr : m->jmethod_id(); // return null if reflected method deleted
387 return ret;
388 JNI_END
389
390 DT_RETURN_MARK_DECL(FromReflectedField, jfieldID
391 , HOTSPOT_JNI_FROMREFLECTEDFIELD_RETURN((uintptr_t)_ret_ref));
392
393 JNI_ENTRY(jfieldID, jni_FromReflectedField(JNIEnv *env, jobject field))
394 HOTSPOT_JNI_FROMREFLECTEDFIELD_ENTRY(env, field);
395
396 jfieldID ret = nullptr;
397 DT_RETURN_MARK(FromReflectedField, jfieldID, (const jfieldID&)ret);
398
399 // field is a handle to a java.lang.reflect.Field object
400 oop reflected = JNIHandles::resolve_non_null(field);
401 oop mirror = java_lang_reflect_Field::clazz(reflected);
402 Klass* k1 = java_lang_Class::as_Klass(mirror);
403 int slot = java_lang_reflect_Field::slot(reflected);
404 int modifiers = java_lang_reflect_Field::modifiers(reflected);
405
406 // Make sure class is initialized before handing id's out to fields
407 k1->initialize(CHECK_NULL);
408
409 // First check if this is a static field
410 if (modifiers & JVM_ACC_STATIC) {
411 int offset = InstanceKlass::cast(k1)->field_offset( slot );
412 JNIid* id = InstanceKlass::cast(k1)->jni_id_for(offset);
413 assert(id != nullptr, "corrupt Field object");
414 DEBUG_ONLY(id->set_is_static_field_id();)
415 // A jfieldID for a static field is a JNIid specifying the field holder and the offset within the Klass*
416 ret = jfieldIDWorkaround::to_static_jfieldID(id);
417 return ret;
418 }
419
420 // The slot is the index of the field description in the field-array
421 // The jfieldID is the offset of the field within the object
422 // It may also have hash bits for k, if VerifyJNIFields is turned on.
423 int offset = InstanceKlass::cast(k1)->field_offset( slot );
424 bool is_flat = InstanceKlass::cast(k1)->field_is_flat(slot);
425 assert(InstanceKlass::cast(k1)->contains_field_offset(offset), "stay within object");
426 ret = jfieldIDWorkaround::to_instance_jfieldID(k1, offset, is_flat);
427 return ret;
428 JNI_END
429
430
431 DT_RETURN_MARK_DECL(ToReflectedMethod, jobject
432 , HOTSPOT_JNI_TOREFLECTEDMETHOD_RETURN(_ret_ref));
433
434 JNI_ENTRY(jobject, jni_ToReflectedMethod(JNIEnv *env, jclass cls, jmethodID method_id, jboolean isStatic))
435 HOTSPOT_JNI_TOREFLECTEDMETHOD_ENTRY(env, cls, (uintptr_t) method_id, isStatic);
436
437 jobject ret = nullptr;
438 DT_RETURN_MARK(ToReflectedMethod, jobject, (const jobject&)ret);
439
440 methodHandle m (THREAD, Method::resolve_jmethod_id(method_id));
441 assert(m->is_static() == (isStatic != 0), "jni_ToReflectedMethod access flags doesn't match");
442 oop reflection_method;
443 if (m->is_object_constructor()) {
444 reflection_method = Reflection::new_constructor(m, CHECK_NULL);
445 } else {
446 // Note: Static initializers can theoretically be here, if JNI users manage
447 // to get their jmethodID. Record them as plain methods.
448 reflection_method = Reflection::new_method(m, false, CHECK_NULL);
449 }
450 ret = JNIHandles::make_local(THREAD, reflection_method);
451 return ret;
452 JNI_END
453
454 DT_RETURN_MARK_DECL(GetSuperclass, jclass
455 , HOTSPOT_JNI_GETSUPERCLASS_RETURN(_ret_ref));
456
457 JNI_ENTRY(jclass, jni_GetSuperclass(JNIEnv *env, jclass sub))
458 HOTSPOT_JNI_GETSUPERCLASS_ENTRY(env, sub);
459
460 jclass obj = nullptr;
461 DT_RETURN_MARK(GetSuperclass, jclass, (const jclass&)obj);
462
463 oop mirror = JNIHandles::resolve_non_null(sub);
464 // primitive classes return null
465 if (java_lang_Class::is_primitive(mirror)) return nullptr;
466
467 // Rules of Class.getSuperClass as implemented by KLass::java_super:
468 // arrays return Object
469 // interfaces return null
470 // proper classes return Klass::super()
471 Klass* k = java_lang_Class::as_Klass(mirror);
472 if (k->is_interface()) return nullptr;
473
474 // return mirror for superclass
475 Klass* super = k->java_super();
476 // super2 is the value computed by the compiler's getSuperClass intrinsic:
477 DEBUG_ONLY(Klass* super2 = ( k->is_array_klass()
478 ? vmClasses::Object_klass()
479 : k->super() ) );
480 assert(super == super2,
481 "java_super computation depends on interface, array, other super");
482 obj = (super == nullptr) ? nullptr : (jclass) JNIHandles::make_local(THREAD, super->java_mirror());
483 return obj;
484 JNI_END
485
486 JNI_ENTRY_NO_PRESERVE(jboolean, jni_IsAssignableFrom(JNIEnv *env, jclass sub, jclass super))
487 HOTSPOT_JNI_ISASSIGNABLEFROM_ENTRY(env, sub, super);
488
489 oop sub_mirror = JNIHandles::resolve_non_null(sub);
490 oop super_mirror = JNIHandles::resolve_non_null(super);
491 if (java_lang_Class::is_primitive(sub_mirror) ||
492 java_lang_Class::is_primitive(super_mirror)) {
493 jboolean ret = (sub_mirror == super_mirror);
494
495 HOTSPOT_JNI_ISASSIGNABLEFROM_RETURN(ret);
496 return ret;
497 }
498 Klass* sub_klass = java_lang_Class::as_Klass(sub_mirror);
499 Klass* super_klass = java_lang_Class::as_Klass(super_mirror);
500 assert(sub_klass != nullptr && super_klass != nullptr, "invalid arguments to jni_IsAssignableFrom");
501 jboolean ret = sub_klass->is_subtype_of(super_klass) ?
502 JNI_TRUE : JNI_FALSE;
503
504 HOTSPOT_JNI_ISASSIGNABLEFROM_RETURN(ret);
505 return ret;
506 JNI_END
507
508
509 DT_RETURN_MARK_DECL(Throw, jint
510 , HOTSPOT_JNI_THROW_RETURN(_ret_ref));
511
512 JNI_ENTRY(jint, jni_Throw(JNIEnv *env, jthrowable obj))
513 HOTSPOT_JNI_THROW_ENTRY(env, obj);
514
515 jint ret = JNI_OK;
516 DT_RETURN_MARK(Throw, jint, (const jint&)ret);
517
518 THROW_OOP_(JNIHandles::resolve(obj), JNI_OK);
519 ShouldNotReachHere();
520 return 0; // Mute compiler.
521 JNI_END
522
523
524 DT_RETURN_MARK_DECL(ThrowNew, jint
525 , HOTSPOT_JNI_THROWNEW_RETURN(_ret_ref));
526
527 JNI_ENTRY(jint, jni_ThrowNew(JNIEnv *env, jclass clazz, const char *message))
528 HOTSPOT_JNI_THROWNEW_ENTRY(env, clazz, (char *) message);
529
530 jint ret = JNI_OK;
531 DT_RETURN_MARK(ThrowNew, jint, (const jint&)ret);
532
533 InstanceKlass* k = java_lang_Class::as_InstanceKlass(JNIHandles::resolve_non_null(clazz));
534 Symbol* name = k->name();
535 Handle class_loader (THREAD, k->class_loader());
536 THROW_MSG_LOADER_(name, (char *)message, class_loader, JNI_OK);
537 ShouldNotReachHere();
538 return 0; // Mute compiler.
539 JNI_END
540
541
542 // JNI functions only transform a pending async exception to a synchronous
543 // exception in ExceptionOccurred and ExceptionCheck calls, since
544 // delivering an async exception in other places won't change the native
545 // code's control flow and would be harmful when native code further calls
546 // JNI functions with a pending exception. Async exception is also checked
547 // during the call, so ExceptionOccurred/ExceptionCheck won't return
548 // false but deliver the async exception at the very end during
549 // state transition.
550
551 static void jni_check_async_exceptions(JavaThread *thread) {
552 assert(thread == Thread::current(), "must be itself");
553 if (thread->has_async_exception_condition()) {
554 SafepointMechanism::process_if_requested_with_exit_check(thread, true /* check asyncs */);
555 }
556 }
557
558 JNI_ENTRY_NO_PRESERVE(jthrowable, jni_ExceptionOccurred(JNIEnv *env))
559 HOTSPOT_JNI_EXCEPTIONOCCURRED_ENTRY(env);
560
561 jni_check_async_exceptions(thread);
562 oop exception = thread->pending_exception();
563 jthrowable ret = (jthrowable) JNIHandles::make_local(THREAD, exception);
564
565 HOTSPOT_JNI_EXCEPTIONOCCURRED_RETURN(ret);
566 return ret;
567 JNI_END
568
569
570 JNI_ENTRY_NO_PRESERVE(void, jni_ExceptionDescribe(JNIEnv *env))
571 HOTSPOT_JNI_EXCEPTIONDESCRIBE_ENTRY(env);
572
573 if (thread->has_pending_exception()) {
574 Handle ex(thread, thread->pending_exception());
575 thread->clear_pending_exception();
576 jio_fprintf(defaultStream::error_stream(), "Exception ");
577 if (thread != nullptr && thread->threadObj() != nullptr) {
578 ResourceMark rm(THREAD);
579 jio_fprintf(defaultStream::error_stream(),
580 "in thread \"%s\" ", thread->name());
581 }
582 if (ex->is_a(vmClasses::Throwable_klass())) {
583 JavaValue result(T_VOID);
584 JavaCalls::call_virtual(&result,
585 ex,
586 vmClasses::Throwable_klass(),
587 vmSymbols::printStackTrace_name(),
588 vmSymbols::void_method_signature(),
589 THREAD);
590 // If an exception is thrown in the call it gets thrown away. Not much
591 // we can do with it. The native code that calls this, does not check
592 // for the exception - hence, it might still be in the thread when DestroyVM gets
593 // called, potentially causing a few asserts to trigger - since no pending exception
594 // is expected.
595 CLEAR_PENDING_EXCEPTION;
596 } else {
597 ResourceMark rm(THREAD);
598 jio_fprintf(defaultStream::error_stream(),
599 ". Uncaught exception of type %s.",
600 ex->klass()->external_name());
601 }
602 }
603
604 HOTSPOT_JNI_EXCEPTIONDESCRIBE_RETURN();
605 JNI_END
606
607
608 JNI_ENTRY_NO_PRESERVE(void, jni_ExceptionClear(JNIEnv *env))
609 HOTSPOT_JNI_EXCEPTIONCLEAR_ENTRY(env);
610
611 // The jni code might be using this API to clear java thrown exception.
612 // So just mark jvmti thread exception state as exception caught.
613 JvmtiThreadState *state = JavaThread::current()->jvmti_thread_state();
614 if (state != nullptr && state->is_exception_detected()) {
615 state->set_exception_caught();
616 }
617 thread->clear_pending_exception();
618
619 HOTSPOT_JNI_EXCEPTIONCLEAR_RETURN();
620 JNI_END
621
622
623 JNI_ENTRY(void, jni_FatalError(JNIEnv *env, const char *msg))
624 HOTSPOT_JNI_FATALERROR_ENTRY(env, (char *) msg);
625
626 tty->print_cr("FATAL ERROR in native method: %s", msg);
627 thread->print_jni_stack();
628 os::abort(); // Dump core and abort
629 JNI_END
630
631
632 JNI_ENTRY(jint, jni_PushLocalFrame(JNIEnv *env, jint capacity))
633 HOTSPOT_JNI_PUSHLOCALFRAME_ENTRY(env, capacity);
634
635 //%note jni_11
636 if (capacity < 0 ||
637 ((MaxJNILocalCapacity > 0) && (capacity > MaxJNILocalCapacity))) {
638 HOTSPOT_JNI_PUSHLOCALFRAME_RETURN((uint32_t)JNI_ERR);
639 return JNI_ERR;
640 }
641
642 thread->push_jni_handle_block();
643 jint ret = JNI_OK;
644 HOTSPOT_JNI_PUSHLOCALFRAME_RETURN(ret);
645 return ret;
646 JNI_END
647
648
649 JNI_ENTRY(jobject, jni_PopLocalFrame(JNIEnv *env, jobject result))
650 HOTSPOT_JNI_POPLOCALFRAME_ENTRY(env, result);
651
652 //%note jni_11
653 Handle result_handle(thread, JNIHandles::resolve(result));
654 JNIHandleBlock* old_handles = thread->active_handles();
655 JNIHandleBlock* new_handles = old_handles->pop_frame_link();
656 if (new_handles != nullptr) {
657 // As a sanity check we only release the handle blocks if the pop_frame_link is not null.
658 // This way code will still work if PopLocalFrame is called without a corresponding
659 // PushLocalFrame call. Note that we set the pop_frame_link to null explicitly, otherwise
660 // the release_block call will release the blocks.
661 thread->set_active_handles(new_handles);
662 old_handles->set_pop_frame_link(nullptr); // clear link we won't release new_handles below
663 JNIHandleBlock::release_block(old_handles, thread); // may block
664 result = JNIHandles::make_local(thread, result_handle());
665 }
666 HOTSPOT_JNI_POPLOCALFRAME_RETURN(result);
667 return result;
668 JNI_END
669
670
671 JNI_ENTRY(jobject, jni_NewGlobalRef(JNIEnv *env, jobject ref))
672 HOTSPOT_JNI_NEWGLOBALREF_ENTRY(env, ref);
673
674 Handle ref_handle(thread, JNIHandles::resolve(ref));
675 jobject ret = JNIHandles::make_global(ref_handle, AllocFailStrategy::RETURN_NULL);
676
677 HOTSPOT_JNI_NEWGLOBALREF_RETURN(ret);
678 return ret;
679 JNI_END
680
681 // Must be JNI_ENTRY (with HandleMark)
682 JNI_ENTRY_NO_PRESERVE(void, jni_DeleteGlobalRef(JNIEnv *env, jobject ref))
683 HOTSPOT_JNI_DELETEGLOBALREF_ENTRY(env, ref);
684
685 JNIHandles::destroy_global(ref);
686
687 HOTSPOT_JNI_DELETEGLOBALREF_RETURN();
688 JNI_END
689
690 JNI_ENTRY_NO_PRESERVE(void, jni_DeleteLocalRef(JNIEnv *env, jobject obj))
691 HOTSPOT_JNI_DELETELOCALREF_ENTRY(env, obj);
692
693 JNIHandles::destroy_local(obj);
694
695 HOTSPOT_JNI_DELETELOCALREF_RETURN();
696 JNI_END
697
698 JNI_ENTRY_NO_PRESERVE(jboolean, jni_IsSameObject(JNIEnv *env, jobject r1, jobject r2))
699 HOTSPOT_JNI_ISSAMEOBJECT_ENTRY(env, r1, r2);
700
701 jboolean ret = JNIHandles::is_same_object(r1, r2) ? JNI_TRUE : JNI_FALSE;
702
703 HOTSPOT_JNI_ISSAMEOBJECT_RETURN(ret);
704 return ret;
705 JNI_END
706
707
708 JNI_ENTRY(jobject, jni_NewLocalRef(JNIEnv *env, jobject ref))
709 HOTSPOT_JNI_NEWLOCALREF_ENTRY(env, ref);
710
711 jobject ret = JNIHandles::make_local(THREAD, JNIHandles::resolve(ref),
712 AllocFailStrategy::RETURN_NULL);
713
714 HOTSPOT_JNI_NEWLOCALREF_RETURN(ret);
715 return ret;
716 JNI_END
717
718 JNI_LEAF(jint, jni_EnsureLocalCapacity(JNIEnv *env, jint capacity))
719 HOTSPOT_JNI_ENSURELOCALCAPACITY_ENTRY(env, capacity);
720
721 jint ret;
722 if (capacity >= 0 &&
723 ((MaxJNILocalCapacity <= 0) || (capacity <= MaxJNILocalCapacity))) {
724 ret = JNI_OK;
725 } else {
726 ret = JNI_ERR;
727 }
728
729 HOTSPOT_JNI_ENSURELOCALCAPACITY_RETURN(ret);
730 return ret;
731 JNI_END
732
733 // Return the Handle Type
734 JNI_LEAF(jobjectRefType, jni_GetObjectRefType(JNIEnv *env, jobject obj))
735 HOTSPOT_JNI_GETOBJECTREFTYPE_ENTRY(env, obj);
736
737 jobjectRefType ret = JNIInvalidRefType;
738 if (obj != nullptr) {
739 ret = JNIHandles::handle_type(thread, obj);
740 }
741
742 HOTSPOT_JNI_GETOBJECTREFTYPE_RETURN((void *) ret);
743 return ret;
744 JNI_END
745
746
747 class JNI_ArgumentPusher : public SignatureIterator {
748 protected:
749 JavaCallArguments* _arguments;
750
751 void push_int(jint x) { _arguments->push_int(x); }
752 void push_long(jlong x) { _arguments->push_long(x); }
753 void push_float(jfloat x) { _arguments->push_float(x); }
754 void push_double(jdouble x) { _arguments->push_double(x); }
755 void push_object(jobject x) { _arguments->push_jobject(x); }
756
757 void push_boolean(jboolean b) {
758 // Normalize boolean arguments from native code by converting 1-255 to JNI_TRUE and
759 // 0 to JNI_FALSE. Boolean return values from native are normalized the same in
760 // TemplateInterpreterGenerator::generate_result_handler_for and
761 // SharedRuntime::generate_native_wrapper.
762 push_int(b == 0 ? JNI_FALSE : JNI_TRUE);
763 }
764
765 JNI_ArgumentPusher(Method* method)
766 : SignatureIterator(method->signature(),
767 Fingerprinter(methodHandle(Thread::current(), method)).fingerprint())
768 {
769 _arguments = nullptr;
770 }
771
772 public:
773 virtual void push_arguments_on(JavaCallArguments* arguments) = 0;
774 };
775
776
777 class JNI_ArgumentPusherVaArg : public JNI_ArgumentPusher {
778 va_list _ap;
779
780 void set_ap(va_list rap) {
781 va_copy(_ap, rap);
782 }
783
784 friend class SignatureIterator; // so do_parameters_on can call do_type
785 void do_type(BasicType type) {
786 switch (type) {
787 // these are coerced to int when using va_arg
788 case T_BYTE:
789 case T_CHAR:
790 case T_SHORT:
791 case T_INT: push_int(va_arg(_ap, jint)); break;
792 case T_BOOLEAN: push_boolean((jboolean) va_arg(_ap, jint)); break;
793
794 // each of these paths is exercised by the various jck Call[Static,Nonvirtual,][Void,Int,..]Method[A,V,] tests
795
796 case T_LONG: push_long(va_arg(_ap, jlong)); break;
797 // float is coerced to double w/ va_arg
798 case T_FLOAT: push_float((jfloat) va_arg(_ap, jdouble)); break;
799 case T_DOUBLE: push_double(va_arg(_ap, jdouble)); break;
800
801 case T_ARRAY:
802 case T_OBJECT: push_object(va_arg(_ap, jobject)); break;
803 default: ShouldNotReachHere();
804 }
805 }
806
807 public:
808 JNI_ArgumentPusherVaArg(jmethodID method_id, va_list rap)
809 : JNI_ArgumentPusher(Method::resolve_jmethod_id(method_id)) {
810 set_ap(rap);
811 }
812
813 ~JNI_ArgumentPusherVaArg() {
814 va_end(_ap);
815 }
816
817 virtual void push_arguments_on(JavaCallArguments* arguments) {
818 _arguments = arguments;
819 do_parameters_on(this);
820 }
821 };
822
823
824 class JNI_ArgumentPusherArray : public JNI_ArgumentPusher {
825 protected:
826 const jvalue *_ap;
827
828 inline void set_ap(const jvalue *rap) { _ap = rap; }
829
830 friend class SignatureIterator; // so do_parameters_on can call do_type
831 void do_type(BasicType type) {
832 switch (type) {
833 case T_CHAR: push_int((_ap++)->c); break;
834 case T_SHORT: push_int((_ap++)->s); break;
835 case T_BYTE: push_int((_ap++)->b); break;
836 case T_INT: push_int((_ap++)->i); break;
837 case T_BOOLEAN: push_boolean((_ap++)->z); break;
838 case T_LONG: push_long((_ap++)->j); break;
839 case T_FLOAT: push_float((_ap++)->f); break;
840 case T_DOUBLE: push_double((_ap++)->d); break;
841 case T_ARRAY:
842 case T_OBJECT: push_object((_ap++)->l); break;
843 default: ShouldNotReachHere();
844 }
845 }
846
847 public:
848 JNI_ArgumentPusherArray(jmethodID method_id, const jvalue *rap)
849 : JNI_ArgumentPusher(Method::resolve_jmethod_id(method_id)) {
850 set_ap(rap);
851 }
852
853 virtual void push_arguments_on(JavaCallArguments* arguments) {
854 _arguments = arguments;
855 do_parameters_on(this);
856 }
857 };
858
859
860 enum JNICallType {
861 JNI_STATIC,
862 JNI_VIRTUAL,
863 JNI_NONVIRTUAL
864 };
865
866
867
868 static void jni_invoke_static(JNIEnv *env, JavaValue* result, jobject receiver, JNICallType call_type, jmethodID method_id, JNI_ArgumentPusher *args, TRAPS) {
869 methodHandle method(THREAD, Method::resolve_jmethod_id(method_id));
870
871 // Create object to hold arguments for the JavaCall, and associate it with
872 // the jni parser
873 ResourceMark rm(THREAD);
874 int number_of_parameters = method->size_of_parameters();
875 JavaCallArguments java_args(number_of_parameters);
876
877 assert(method->is_static(), "method should be static");
878
879 // Fill out JavaCallArguments object
880 args->push_arguments_on(&java_args);
881 // Initialize result type
882 result->set_type(args->return_type());
883
884 // Invoke the method. Result is returned as oop.
885 JavaCalls::call(result, method, &java_args, CHECK);
886
887 // Convert result
888 if (is_reference_type(result->get_type())) {
889 result->set_jobject(JNIHandles::make_local(THREAD, result->get_oop()));
890 }
891 }
892
893
894 static void jni_invoke_nonstatic(JNIEnv *env, JavaValue* result, jobject receiver, JNICallType call_type, jmethodID method_id, JNI_ArgumentPusher *args, TRAPS) {
895 oop recv = JNIHandles::resolve(receiver);
896 if (recv == nullptr) {
897 THROW(vmSymbols::java_lang_NullPointerException());
898 }
899 Handle h_recv(THREAD, recv);
900
901 int number_of_parameters;
902 Method* selected_method;
903 {
904 Method* m = Method::resolve_jmethod_id(method_id);
905 number_of_parameters = m->size_of_parameters();
906 InstanceKlass* holder = m->method_holder();
907 if (call_type != JNI_VIRTUAL) {
908 selected_method = m;
909 } else if (!m->has_itable_index()) {
910 // non-interface call -- for that little speed boost, don't handlize
911 DEBUG_ONLY(NoSafepointVerifier nosafepoint;)
912 // jni_GetMethodID makes sure class is linked and initialized
913 // so m should have a valid vtable index.
914 assert(m->valid_vtable_index(), "no valid vtable index");
915 int vtbl_index = m->vtable_index();
916 if (vtbl_index != Method::nonvirtual_vtable_index) {
917 selected_method = h_recv->klass()->method_at_vtable(vtbl_index);
918 } else {
919 // final method
920 selected_method = m;
921 }
922 } else {
923 // interface call
924 int itbl_index = m->itable_index();
925 Klass* k = h_recv->klass();
926 selected_method = InstanceKlass::cast(k)->method_at_itable(holder, itbl_index, CHECK);
927 }
928 }
929
930 if (selected_method->is_abstract()) {
931 ResourceMark rm(THREAD);
932 THROW_MSG(vmSymbols::java_lang_AbstractMethodError(), selected_method->name()->as_C_string());
933 }
934
935 methodHandle method(THREAD, selected_method);
936
937 // Create object to hold arguments for the JavaCall, and associate it with
938 // the jni parser
939 ResourceMark rm(THREAD);
940 JavaCallArguments java_args(number_of_parameters);
941
942 // handle arguments
943 assert(!method->is_static(), "method %s should not be static", method->name_and_sig_as_C_string());
944 java_args.push_oop(h_recv); // Push jobject handle
945
946 // Fill out JavaCallArguments object
947 args->push_arguments_on(&java_args);
948 // Initialize result type
949 result->set_type(args->return_type());
950
951 // Invoke the method. Result is returned as oop.
952 JavaCalls::call(result, method, &java_args, CHECK);
953
954 // Convert result
955 if (is_reference_type(result->get_type())) {
956 result->set_jobject(JNIHandles::make_local(THREAD, result->get_oop()));
957 }
958 }
959
960 DT_RETURN_MARK_DECL(AllocObject, jobject
961 , HOTSPOT_JNI_ALLOCOBJECT_RETURN(_ret_ref));
962
963 JNI_ENTRY(jobject, jni_AllocObject(JNIEnv *env, jclass clazz))
964 HOTSPOT_JNI_ALLOCOBJECT_ENTRY(env, clazz);
965
966 jobject ret = nullptr;
967 DT_RETURN_MARK(AllocObject, jobject, (const jobject&)ret);
968
969 oop clazzoop = JNIHandles::resolve_non_null(clazz);
970 Klass* k = java_lang_Class::as_Klass(clazzoop);
971 if (k == nullptr || k->is_inline_klass()) {
972 ResourceMark rm(THREAD);
973 THROW_(vmSymbols::java_lang_InstantiationException(), nullptr);
974 }
975 instanceOop i = InstanceKlass::allocate_instance(clazzoop, CHECK_NULL);
976 ret = JNIHandles::make_local(THREAD, i);
977 return ret;
978 JNI_END
979
980 DT_RETURN_MARK_DECL(NewObjectA, jobject
981 , HOTSPOT_JNI_NEWOBJECTA_RETURN(_ret_ref));
982
983 JNI_ENTRY(jobject, jni_NewObjectA(JNIEnv *env, jclass clazz, jmethodID methodID, const jvalue *args))
984 HOTSPOT_JNI_NEWOBJECTA_ENTRY(env, clazz, (uintptr_t) methodID);
985
986 jobject obj = nullptr;
987 DT_RETURN_MARK(NewObjectA, jobject, (const jobject&)obj);
988
989 oop clazzoop = JNIHandles::resolve_non_null(clazz);
990 Klass* k = java_lang_Class::as_Klass(clazzoop);
991 if (k == nullptr) {
992 ResourceMark rm(THREAD);
993 THROW_(vmSymbols::java_lang_InstantiationException(), nullptr);
994 }
995
996 instanceOop i = InstanceKlass::allocate_instance(clazzoop, CHECK_NULL);
997 obj = JNIHandles::make_local(THREAD, i);
998 JavaValue jvalue(T_VOID);
999 JNI_ArgumentPusherArray ap(methodID, args);
1000 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_NULL);
1001
1002 return obj;
1003 JNI_END
1004
1005
1006 DT_RETURN_MARK_DECL(NewObjectV, jobject
1007 , HOTSPOT_JNI_NEWOBJECTV_RETURN(_ret_ref));
1008
1009 JNI_ENTRY(jobject, jni_NewObjectV(JNIEnv *env, jclass clazz, jmethodID methodID, va_list args))
1010 HOTSPOT_JNI_NEWOBJECTV_ENTRY(env, clazz, (uintptr_t) methodID);
1011
1012 jobject obj = nullptr;
1013 DT_RETURN_MARK(NewObjectV, jobject, (const jobject&)obj);
1014
1015 oop clazzoop = JNIHandles::resolve_non_null(clazz);
1016 Klass* k = java_lang_Class::as_Klass(clazzoop);
1017 if (k == nullptr) {
1018 ResourceMark rm(THREAD);
1019 THROW_(vmSymbols::java_lang_InstantiationException(), nullptr);
1020 }
1021
1022 instanceOop i = InstanceKlass::allocate_instance(clazzoop, CHECK_NULL);
1023 obj = JNIHandles::make_local(THREAD, i);
1024 JavaValue jvalue(T_VOID);
1025 JNI_ArgumentPusherVaArg ap(methodID, args);
1026 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_NULL);
1027
1028 return obj;
1029 JNI_END
1030
1031
1032 DT_RETURN_MARK_DECL(NewObject, jobject
1033 , HOTSPOT_JNI_NEWOBJECT_RETURN(_ret_ref));
1034
1035 JNI_ENTRY(jobject, jni_NewObject(JNIEnv *env, jclass clazz, jmethodID methodID, ...))
1036 HOTSPOT_JNI_NEWOBJECT_ENTRY(env, clazz, (uintptr_t) methodID);
1037
1038 jobject obj = nullptr;
1039 DT_RETURN_MARK(NewObject, jobject, (const jobject&)obj);
1040
1041 oop clazzoop = JNIHandles::resolve_non_null(clazz);
1042 Klass* k = java_lang_Class::as_Klass(clazzoop);
1043 if (k == nullptr) {
1044 ResourceMark rm(THREAD);
1045 THROW_(vmSymbols::java_lang_InstantiationException(), nullptr);
1046 }
1047
1048 instanceOop i = InstanceKlass::allocate_instance(clazzoop, CHECK_NULL);
1049 obj = JNIHandles::make_local(THREAD, i);
1050 va_list args;
1051 va_start(args, methodID);
1052 JavaValue jvalue(T_VOID);
1053 JNI_ArgumentPusherVaArg ap(methodID, args);
1054 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_NULL);
1055 va_end(args);
1056
1057 return obj;
1058 JNI_END
1059
1060
1061 JNI_ENTRY(jclass, jni_GetObjectClass(JNIEnv *env, jobject obj))
1062 HOTSPOT_JNI_GETOBJECTCLASS_ENTRY(env, obj);
1063
1064 Klass* k = JNIHandles::resolve_non_null(obj)->klass();
1065 jclass ret =
1066 (jclass) JNIHandles::make_local(THREAD, k->java_mirror());
1067
1068 HOTSPOT_JNI_GETOBJECTCLASS_RETURN(ret);
1069 return ret;
1070 JNI_END
1071
1072 JNI_ENTRY_NO_PRESERVE(jboolean, jni_IsInstanceOf(JNIEnv *env, jobject obj, jclass clazz))
1073 HOTSPOT_JNI_ISINSTANCEOF_ENTRY(env, obj, clazz);
1074
1075 jboolean ret = JNI_TRUE;
1076 if (obj != nullptr) {
1077 ret = JNI_FALSE;
1078 Klass* k = java_lang_Class::as_Klass(
1079 JNIHandles::resolve_non_null(clazz));
1080 if (k != nullptr) {
1081 ret = JNIHandles::resolve_non_null(obj)->is_a(k) ? JNI_TRUE : JNI_FALSE;
1082 }
1083 }
1084
1085 HOTSPOT_JNI_ISINSTANCEOF_RETURN(ret);
1086 return ret;
1087 JNI_END
1088
1089
1090 static jmethodID get_method_id(JNIEnv *env, jclass clazz, const char *name_str,
1091 const char *sig, bool is_static, TRAPS) {
1092 // %%%% This code should probably just call into a method in the LinkResolver
1093 //
1094 // The class should have been loaded (we have an instance of the class
1095 // passed in) so the method and signature should already be in the symbol
1096 // table. If they're not there, the method doesn't exist.
1097 const char *name_to_probe = (name_str == nullptr)
1098 ? vmSymbols::object_initializer_name()->as_C_string()
1099 : name_str;
1100 TempNewSymbol name = SymbolTable::probe(name_to_probe, (int)strlen(name_to_probe));
1101 TempNewSymbol signature = SymbolTable::probe(sig, (int)strlen(sig));
1102
1103 if (name == nullptr || signature == nullptr) {
1104 THROW_MSG_NULL(vmSymbols::java_lang_NoSuchMethodError(), name_str);
1105 }
1106
1107 oop mirror = JNIHandles::resolve_non_null(clazz);
1108 Klass* klass = java_lang_Class::as_Klass(mirror);
1109
1110 // Throw a NoSuchMethodError exception if we have an instance of a
1111 // primitive java.lang.Class
1112 if (java_lang_Class::is_primitive(mirror)) {
1113 ResourceMark rm(THREAD);
1114 THROW_MSG_NULL(vmSymbols::java_lang_NoSuchMethodError(), err_msg("%s%s.%s%s", is_static ? "static " : "", klass->signature_name(), name_str, sig));
1115 }
1116
1117 // Make sure class is linked and initialized before handing id's out to
1118 // Method*s.
1119 klass->initialize(CHECK_NULL);
1120
1121 Method* m;
1122 if (name == vmSymbols::object_initializer_name() ||
1123 name == vmSymbols::class_initializer_name()) {
1124 // Never search superclasses for constructors
1125 if (klass->is_instance_klass()) {
1126 m = InstanceKlass::cast(klass)->find_method(name, signature);
1127 } else {
1128 m = nullptr;
1129 }
1130 } else {
1131 m = klass->lookup_method(name, signature);
1132 if (m == nullptr && klass->is_instance_klass()) {
1133 m = InstanceKlass::cast(klass)->lookup_method_in_ordered_interfaces(name, signature);
1134 }
1135 }
1136 if (m == nullptr || (m->is_static() != is_static)) {
1137 ResourceMark rm(THREAD);
1138 THROW_MSG_NULL(vmSymbols::java_lang_NoSuchMethodError(), err_msg("%s%s.%s%s", is_static ? "static " : "", klass->signature_name(), name_str, sig));
1139 }
1140 return m->jmethod_id();
1141 }
1142
1143
1144 JNI_ENTRY(jmethodID, jni_GetMethodID(JNIEnv *env, jclass clazz,
1145 const char *name, const char *sig))
1146 HOTSPOT_JNI_GETMETHODID_ENTRY(env, clazz, (char *) name, (char *) sig);
1147 jmethodID ret = get_method_id(env, clazz, name, sig, false, thread);
1148 HOTSPOT_JNI_GETMETHODID_RETURN((uintptr_t) ret);
1149 return ret;
1150 JNI_END
1151
1152
1153 JNI_ENTRY(jmethodID, jni_GetStaticMethodID(JNIEnv *env, jclass clazz,
1154 const char *name, const char *sig))
1155 HOTSPOT_JNI_GETSTATICMETHODID_ENTRY(env, (char *) clazz, (char *) name, (char *)sig);
1156 jmethodID ret = get_method_id(env, clazz, name, sig, true, thread);
1157 HOTSPOT_JNI_GETSTATICMETHODID_RETURN((uintptr_t) ret);
1158 return ret;
1159 JNI_END
1160
1161
1162
1163 //
1164 // Calling Methods
1165 //
1166
1167
1168 #define DEFINE_CALLMETHOD(ResultType, Result, Tag \
1169 , EntryProbe, ReturnProbe) \
1170 \
1171 DT_RETURN_MARK_DECL_FOR(Result, Call##Result##Method, ResultType \
1172 , ReturnProbe); \
1173 \
1174 JNI_ENTRY(ResultType, \
1175 jni_Call##Result##Method(JNIEnv *env, jobject obj, jmethodID methodID, ...)) \
1176 \
1177 EntryProbe; \
1178 ResultType ret{}; \
1179 DT_RETURN_MARK_FOR(Result, Call##Result##Method, ResultType, \
1180 (const ResultType&)ret);\
1181 \
1182 va_list args; \
1183 va_start(args, methodID); \
1184 JavaValue jvalue(Tag); \
1185 JNI_ArgumentPusherVaArg ap(methodID, args); \
1186 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK_(ResultType{})); \
1187 va_end(args); \
1188 ret = jvalue.get_##ResultType(); \
1189 return ret;\
1190 JNI_END
1191
1192 // the runtime type of subword integral basic types is integer
1193 DEFINE_CALLMETHOD(jboolean, Boolean, T_BOOLEAN
1194 , HOTSPOT_JNI_CALLBOOLEANMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1195 HOTSPOT_JNI_CALLBOOLEANMETHOD_RETURN(_ret_ref))
1196 DEFINE_CALLMETHOD(jbyte, Byte, T_BYTE
1197 , HOTSPOT_JNI_CALLBYTEMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1198 HOTSPOT_JNI_CALLBYTEMETHOD_RETURN(_ret_ref))
1199 DEFINE_CALLMETHOD(jchar, Char, T_CHAR
1200 , HOTSPOT_JNI_CALLCHARMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1201 HOTSPOT_JNI_CALLCHARMETHOD_RETURN(_ret_ref))
1202 DEFINE_CALLMETHOD(jshort, Short, T_SHORT
1203 , HOTSPOT_JNI_CALLSHORTMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1204 HOTSPOT_JNI_CALLSHORTMETHOD_RETURN(_ret_ref))
1205
1206 DEFINE_CALLMETHOD(jobject, Object, T_OBJECT
1207 , HOTSPOT_JNI_CALLOBJECTMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1208 HOTSPOT_JNI_CALLOBJECTMETHOD_RETURN(_ret_ref))
1209 DEFINE_CALLMETHOD(jint, Int, T_INT,
1210 HOTSPOT_JNI_CALLINTMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1211 HOTSPOT_JNI_CALLINTMETHOD_RETURN(_ret_ref))
1212 DEFINE_CALLMETHOD(jlong, Long, T_LONG
1213 , HOTSPOT_JNI_CALLLONGMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1214 HOTSPOT_JNI_CALLLONGMETHOD_RETURN(_ret_ref))
1215 // Float and double probes don't return value because dtrace doesn't currently support it
1216 DEFINE_CALLMETHOD(jfloat, Float, T_FLOAT
1217 , HOTSPOT_JNI_CALLFLOATMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1218 HOTSPOT_JNI_CALLFLOATMETHOD_RETURN())
1219 DEFINE_CALLMETHOD(jdouble, Double, T_DOUBLE
1220 , HOTSPOT_JNI_CALLDOUBLEMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1221 HOTSPOT_JNI_CALLDOUBLEMETHOD_RETURN())
1222
1223 #define DEFINE_CALLMETHODV(ResultType, Result, Tag \
1224 , EntryProbe, ReturnProbe) \
1225 \
1226 DT_RETURN_MARK_DECL_FOR(Result, Call##Result##MethodV, ResultType \
1227 , ReturnProbe); \
1228 \
1229 JNI_ENTRY(ResultType, \
1230 jni_Call##Result##MethodV(JNIEnv *env, jobject obj, jmethodID methodID, va_list args)) \
1231 \
1232 EntryProbe;\
1233 ResultType ret{}; \
1234 DT_RETURN_MARK_FOR(Result, Call##Result##MethodV, ResultType, \
1235 (const ResultType&)ret);\
1236 \
1237 JavaValue jvalue(Tag); \
1238 JNI_ArgumentPusherVaArg ap(methodID, args); \
1239 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK_(ResultType{})); \
1240 ret = jvalue.get_##ResultType(); \
1241 return ret;\
1242 JNI_END
1243
1244 // the runtime type of subword integral basic types is integer
1245 DEFINE_CALLMETHODV(jboolean, Boolean, T_BOOLEAN
1246 , HOTSPOT_JNI_CALLBOOLEANMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1247 HOTSPOT_JNI_CALLBOOLEANMETHODV_RETURN(_ret_ref))
1248 DEFINE_CALLMETHODV(jbyte, Byte, T_BYTE
1249 , HOTSPOT_JNI_CALLBYTEMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1250 HOTSPOT_JNI_CALLBYTEMETHODV_RETURN(_ret_ref))
1251 DEFINE_CALLMETHODV(jchar, Char, T_CHAR
1252 , HOTSPOT_JNI_CALLCHARMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1253 HOTSPOT_JNI_CALLCHARMETHODV_RETURN(_ret_ref))
1254 DEFINE_CALLMETHODV(jshort, Short, T_SHORT
1255 , HOTSPOT_JNI_CALLSHORTMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1256 HOTSPOT_JNI_CALLSHORTMETHODV_RETURN(_ret_ref))
1257
1258 DEFINE_CALLMETHODV(jobject, Object, T_OBJECT
1259 , HOTSPOT_JNI_CALLOBJECTMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1260 HOTSPOT_JNI_CALLOBJECTMETHODV_RETURN(_ret_ref))
1261 DEFINE_CALLMETHODV(jint, Int, T_INT,
1262 HOTSPOT_JNI_CALLINTMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1263 HOTSPOT_JNI_CALLINTMETHODV_RETURN(_ret_ref))
1264 DEFINE_CALLMETHODV(jlong, Long, T_LONG
1265 , HOTSPOT_JNI_CALLLONGMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1266 HOTSPOT_JNI_CALLLONGMETHODV_RETURN(_ret_ref))
1267 // Float and double probes don't return value because dtrace doesn't currently support it
1268 DEFINE_CALLMETHODV(jfloat, Float, T_FLOAT
1269 , HOTSPOT_JNI_CALLFLOATMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1270 HOTSPOT_JNI_CALLFLOATMETHODV_RETURN())
1271 DEFINE_CALLMETHODV(jdouble, Double, T_DOUBLE
1272 , HOTSPOT_JNI_CALLDOUBLEMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1273 HOTSPOT_JNI_CALLDOUBLEMETHODV_RETURN())
1274
1275 #define DEFINE_CALLMETHODA(ResultType, Result, Tag \
1276 , EntryProbe, ReturnProbe) \
1277 \
1278 DT_RETURN_MARK_DECL_FOR(Result, Call##Result##MethodA, ResultType \
1279 , ReturnProbe); \
1280 \
1281 JNI_ENTRY(ResultType, \
1282 jni_Call##Result##MethodA(JNIEnv *env, jobject obj, jmethodID methodID, const jvalue *args)) \
1283 EntryProbe; \
1284 ResultType ret{}; \
1285 DT_RETURN_MARK_FOR(Result, Call##Result##MethodA, ResultType, \
1286 (const ResultType&)ret);\
1287 \
1288 JavaValue jvalue(Tag); \
1289 JNI_ArgumentPusherArray ap(methodID, args); \
1290 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK_(ResultType{})); \
1291 ret = jvalue.get_##ResultType(); \
1292 return ret;\
1293 JNI_END
1294
1295 // the runtime type of subword integral basic types is integer
1296 DEFINE_CALLMETHODA(jboolean, Boolean, T_BOOLEAN
1297 , HOTSPOT_JNI_CALLBOOLEANMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1298 HOTSPOT_JNI_CALLBOOLEANMETHODA_RETURN(_ret_ref))
1299 DEFINE_CALLMETHODA(jbyte, Byte, T_BYTE
1300 , HOTSPOT_JNI_CALLBYTEMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1301 HOTSPOT_JNI_CALLBYTEMETHODA_RETURN(_ret_ref))
1302 DEFINE_CALLMETHODA(jchar, Char, T_CHAR
1303 , HOTSPOT_JNI_CALLCHARMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1304 HOTSPOT_JNI_CALLCHARMETHODA_RETURN(_ret_ref))
1305 DEFINE_CALLMETHODA(jshort, Short, T_SHORT
1306 , HOTSPOT_JNI_CALLSHORTMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1307 HOTSPOT_JNI_CALLSHORTMETHODA_RETURN(_ret_ref))
1308
1309 DEFINE_CALLMETHODA(jobject, Object, T_OBJECT
1310 , HOTSPOT_JNI_CALLOBJECTMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1311 HOTSPOT_JNI_CALLOBJECTMETHODA_RETURN(_ret_ref))
1312 DEFINE_CALLMETHODA(jint, Int, T_INT,
1313 HOTSPOT_JNI_CALLINTMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1314 HOTSPOT_JNI_CALLINTMETHODA_RETURN(_ret_ref))
1315 DEFINE_CALLMETHODA(jlong, Long, T_LONG
1316 , HOTSPOT_JNI_CALLLONGMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1317 HOTSPOT_JNI_CALLLONGMETHODA_RETURN(_ret_ref))
1318 // Float and double probes don't return value because dtrace doesn't currently support it
1319 DEFINE_CALLMETHODA(jfloat, Float, T_FLOAT
1320 , HOTSPOT_JNI_CALLFLOATMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1321 HOTSPOT_JNI_CALLFLOATMETHODA_RETURN())
1322 DEFINE_CALLMETHODA(jdouble, Double, T_DOUBLE
1323 , HOTSPOT_JNI_CALLDOUBLEMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1324 HOTSPOT_JNI_CALLDOUBLEMETHODA_RETURN())
1325
1326 DT_VOID_RETURN_MARK_DECL(CallVoidMethod, HOTSPOT_JNI_CALLVOIDMETHOD_RETURN());
1327 DT_VOID_RETURN_MARK_DECL(CallVoidMethodV, HOTSPOT_JNI_CALLVOIDMETHODV_RETURN());
1328 DT_VOID_RETURN_MARK_DECL(CallVoidMethodA, HOTSPOT_JNI_CALLVOIDMETHODA_RETURN());
1329
1330
1331 JNI_ENTRY(void, jni_CallVoidMethod(JNIEnv *env, jobject obj, jmethodID methodID, ...))
1332 HOTSPOT_JNI_CALLVOIDMETHOD_ENTRY(env, obj, (uintptr_t) methodID);
1333 DT_VOID_RETURN_MARK(CallVoidMethod);
1334
1335 va_list args;
1336 va_start(args, methodID);
1337 JavaValue jvalue(T_VOID);
1338 JNI_ArgumentPusherVaArg ap(methodID, args);
1339 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK);
1340 va_end(args);
1341 JNI_END
1342
1343
1344 JNI_ENTRY(void, jni_CallVoidMethodV(JNIEnv *env, jobject obj, jmethodID methodID, va_list args))
1345 HOTSPOT_JNI_CALLVOIDMETHODV_ENTRY(env, obj, (uintptr_t) methodID);
1346 DT_VOID_RETURN_MARK(CallVoidMethodV);
1347
1348 JavaValue jvalue(T_VOID);
1349 JNI_ArgumentPusherVaArg ap(methodID, args);
1350 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK);
1351 JNI_END
1352
1353
1354 JNI_ENTRY(void, jni_CallVoidMethodA(JNIEnv *env, jobject obj, jmethodID methodID, const jvalue *args))
1355 HOTSPOT_JNI_CALLVOIDMETHODA_ENTRY(env, obj, (uintptr_t) methodID);
1356 DT_VOID_RETURN_MARK(CallVoidMethodA);
1357
1358 JavaValue jvalue(T_VOID);
1359 JNI_ArgumentPusherArray ap(methodID, args);
1360 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK);
1361 JNI_END
1362
1363
1364
1365 #define DEFINE_CALLNONVIRTUALMETHOD(ResultType, Result, Tag \
1366 , EntryProbe, ReturnProbe) \
1367 \
1368 DT_RETURN_MARK_DECL_FOR(Result, CallNonvirtual##Result##Method, ResultType \
1369 , ReturnProbe);\
1370 \
1371 JNI_ENTRY(ResultType, \
1372 jni_CallNonvirtual##Result##Method(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, ...)) \
1373 \
1374 EntryProbe;\
1375 ResultType ret;\
1376 DT_RETURN_MARK_FOR(Result, CallNonvirtual##Result##Method, ResultType, \
1377 (const ResultType&)ret);\
1378 \
1379 va_list args; \
1380 va_start(args, methodID); \
1381 JavaValue jvalue(Tag); \
1382 JNI_ArgumentPusherVaArg ap(methodID, args); \
1383 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_(ResultType{})); \
1384 va_end(args); \
1385 ret = jvalue.get_##ResultType(); \
1386 return ret;\
1387 JNI_END
1388
1389 // the runtime type of subword integral basic types is integer
1390 DEFINE_CALLNONVIRTUALMETHOD(jboolean, Boolean, T_BOOLEAN
1391 , HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1392 HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHOD_RETURN(_ret_ref))
1393 DEFINE_CALLNONVIRTUALMETHOD(jbyte, Byte, T_BYTE
1394 , HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1395 HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHOD_RETURN(_ret_ref))
1396 DEFINE_CALLNONVIRTUALMETHOD(jchar, Char, T_CHAR
1397 , HOTSPOT_JNI_CALLNONVIRTUALCHARMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1398 HOTSPOT_JNI_CALLNONVIRTUALCHARMETHOD_RETURN(_ret_ref))
1399 DEFINE_CALLNONVIRTUALMETHOD(jshort, Short, T_SHORT
1400 , HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1401 HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHOD_RETURN(_ret_ref))
1402
1403 DEFINE_CALLNONVIRTUALMETHOD(jobject, Object, T_OBJECT
1404 , HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1405 HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHOD_RETURN(_ret_ref))
1406 DEFINE_CALLNONVIRTUALMETHOD(jint, Int, T_INT
1407 , HOTSPOT_JNI_CALLNONVIRTUALINTMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1408 HOTSPOT_JNI_CALLNONVIRTUALINTMETHOD_RETURN(_ret_ref))
1409 DEFINE_CALLNONVIRTUALMETHOD(jlong, Long, T_LONG
1410 , HOTSPOT_JNI_CALLNONVIRTUALLONGMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1411 // Float and double probes don't return value because dtrace doesn't currently support it
1412 HOTSPOT_JNI_CALLNONVIRTUALLONGMETHOD_RETURN(_ret_ref))
1413 DEFINE_CALLNONVIRTUALMETHOD(jfloat, Float, T_FLOAT
1414 , HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1415 HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHOD_RETURN())
1416 DEFINE_CALLNONVIRTUALMETHOD(jdouble, Double, T_DOUBLE
1417 , HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1418 HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHOD_RETURN())
1419
1420 #define DEFINE_CALLNONVIRTUALMETHODV(ResultType, Result, Tag \
1421 , EntryProbe, ReturnProbe) \
1422 \
1423 DT_RETURN_MARK_DECL_FOR(Result, CallNonvirtual##Result##MethodV, ResultType \
1424 , ReturnProbe);\
1425 \
1426 JNI_ENTRY(ResultType, \
1427 jni_CallNonvirtual##Result##MethodV(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, va_list args)) \
1428 \
1429 EntryProbe;\
1430 ResultType ret;\
1431 DT_RETURN_MARK_FOR(Result, CallNonvirtual##Result##MethodV, ResultType, \
1432 (const ResultType&)ret);\
1433 \
1434 JavaValue jvalue(Tag); \
1435 JNI_ArgumentPusherVaArg ap(methodID, args); \
1436 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_(ResultType{})); \
1437 ret = jvalue.get_##ResultType(); \
1438 return ret;\
1439 JNI_END
1440
1441 // the runtime type of subword integral basic types is integer
1442 DEFINE_CALLNONVIRTUALMETHODV(jboolean, Boolean, T_BOOLEAN
1443 , HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1444 HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHODV_RETURN(_ret_ref))
1445 DEFINE_CALLNONVIRTUALMETHODV(jbyte, Byte, T_BYTE
1446 , HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1447 HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHODV_RETURN(_ret_ref))
1448 DEFINE_CALLNONVIRTUALMETHODV(jchar, Char, T_CHAR
1449 , HOTSPOT_JNI_CALLNONVIRTUALCHARMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1450 HOTSPOT_JNI_CALLNONVIRTUALCHARMETHODV_RETURN(_ret_ref))
1451 DEFINE_CALLNONVIRTUALMETHODV(jshort, Short, T_SHORT
1452 , HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1453 HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHODV_RETURN(_ret_ref))
1454
1455 DEFINE_CALLNONVIRTUALMETHODV(jobject, Object, T_OBJECT
1456 , HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1457 HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHODV_RETURN(_ret_ref))
1458 DEFINE_CALLNONVIRTUALMETHODV(jint, Int, T_INT
1459 , HOTSPOT_JNI_CALLNONVIRTUALINTMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1460 HOTSPOT_JNI_CALLNONVIRTUALINTMETHODV_RETURN(_ret_ref))
1461 DEFINE_CALLNONVIRTUALMETHODV(jlong, Long, T_LONG
1462 , HOTSPOT_JNI_CALLNONVIRTUALLONGMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1463 // Float and double probes don't return value because dtrace doesn't currently support it
1464 HOTSPOT_JNI_CALLNONVIRTUALLONGMETHODV_RETURN(_ret_ref))
1465 DEFINE_CALLNONVIRTUALMETHODV(jfloat, Float, T_FLOAT
1466 , HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1467 HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHODV_RETURN())
1468 DEFINE_CALLNONVIRTUALMETHODV(jdouble, Double, T_DOUBLE
1469 , HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1470 HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHODV_RETURN())
1471
1472 #define DEFINE_CALLNONVIRTUALMETHODA(ResultType, Result, Tag \
1473 , EntryProbe, ReturnProbe) \
1474 \
1475 DT_RETURN_MARK_DECL_FOR(Result, CallNonvirtual##Result##MethodA, ResultType \
1476 , ReturnProbe);\
1477 \
1478 JNI_ENTRY(ResultType, \
1479 jni_CallNonvirtual##Result##MethodA(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, const jvalue *args)) \
1480 \
1481 EntryProbe;\
1482 ResultType ret;\
1483 DT_RETURN_MARK_FOR(Result, CallNonvirtual##Result##MethodA, ResultType, \
1484 (const ResultType&)ret);\
1485 \
1486 JavaValue jvalue(Tag); \
1487 JNI_ArgumentPusherArray ap(methodID, args); \
1488 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_(ResultType{})); \
1489 ret = jvalue.get_##ResultType(); \
1490 return ret;\
1491 JNI_END
1492
1493 // the runtime type of subword integral basic types is integer
1494 DEFINE_CALLNONVIRTUALMETHODA(jboolean, Boolean, T_BOOLEAN
1495 , HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1496 HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHODA_RETURN(_ret_ref))
1497 DEFINE_CALLNONVIRTUALMETHODA(jbyte, Byte, T_BYTE
1498 , HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1499 HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHODA_RETURN(_ret_ref))
1500 DEFINE_CALLNONVIRTUALMETHODA(jchar, Char, T_CHAR
1501 , HOTSPOT_JNI_CALLNONVIRTUALCHARMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1502 HOTSPOT_JNI_CALLNONVIRTUALCHARMETHODA_RETURN(_ret_ref))
1503 DEFINE_CALLNONVIRTUALMETHODA(jshort, Short, T_SHORT
1504 , HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1505 HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHODA_RETURN(_ret_ref))
1506
1507 DEFINE_CALLNONVIRTUALMETHODA(jobject, Object, T_OBJECT
1508 , HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1509 HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHODA_RETURN(_ret_ref))
1510 DEFINE_CALLNONVIRTUALMETHODA(jint, Int, T_INT
1511 , HOTSPOT_JNI_CALLNONVIRTUALINTMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1512 HOTSPOT_JNI_CALLNONVIRTUALINTMETHODA_RETURN(_ret_ref))
1513 DEFINE_CALLNONVIRTUALMETHODA(jlong, Long, T_LONG
1514 , HOTSPOT_JNI_CALLNONVIRTUALLONGMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1515 // Float and double probes don't return value because dtrace doesn't currently support it
1516 HOTSPOT_JNI_CALLNONVIRTUALLONGMETHODA_RETURN(_ret_ref))
1517 DEFINE_CALLNONVIRTUALMETHODA(jfloat, Float, T_FLOAT
1518 , HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1519 HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHODA_RETURN())
1520 DEFINE_CALLNONVIRTUALMETHODA(jdouble, Double, T_DOUBLE
1521 , HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1522 HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHODA_RETURN())
1523
1524 DT_VOID_RETURN_MARK_DECL(CallNonvirtualVoidMethod
1525 , HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHOD_RETURN());
1526 DT_VOID_RETURN_MARK_DECL(CallNonvirtualVoidMethodV
1527 , HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHODV_RETURN());
1528 DT_VOID_RETURN_MARK_DECL(CallNonvirtualVoidMethodA
1529 , HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHODA_RETURN());
1530
1531 JNI_ENTRY(void, jni_CallNonvirtualVoidMethod(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, ...))
1532 HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHOD_ENTRY(env, obj, cls, (uintptr_t) methodID);
1533 DT_VOID_RETURN_MARK(CallNonvirtualVoidMethod);
1534
1535 va_list args;
1536 va_start(args, methodID);
1537 JavaValue jvalue(T_VOID);
1538 JNI_ArgumentPusherVaArg ap(methodID, args);
1539 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK);
1540 va_end(args);
1541 JNI_END
1542
1543
1544 JNI_ENTRY(void, jni_CallNonvirtualVoidMethodV(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, va_list args))
1545 HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHODV_ENTRY(
1546 env, obj, cls, (uintptr_t) methodID);
1547 DT_VOID_RETURN_MARK(CallNonvirtualVoidMethodV);
1548
1549 JavaValue jvalue(T_VOID);
1550 JNI_ArgumentPusherVaArg ap(methodID, args);
1551 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK);
1552 JNI_END
1553
1554
1555 JNI_ENTRY(void, jni_CallNonvirtualVoidMethodA(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, const jvalue *args))
1556 HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHODA_ENTRY(
1557 env, obj, cls, (uintptr_t) methodID);
1558 DT_VOID_RETURN_MARK(CallNonvirtualVoidMethodA);
1559 JavaValue jvalue(T_VOID);
1560 JNI_ArgumentPusherArray ap(methodID, args);
1561 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK);
1562 JNI_END
1563
1564
1565
1566 #define DEFINE_CALLSTATICMETHOD(ResultType, Result, Tag \
1567 , EntryProbe, ResultProbe) \
1568 \
1569 DT_RETURN_MARK_DECL_FOR(Result, CallStatic##Result##Method, ResultType \
1570 , ResultProbe); \
1571 \
1572 JNI_ENTRY(ResultType, \
1573 jni_CallStatic##Result##Method(JNIEnv *env, jclass cls, jmethodID methodID, ...)) \
1574 \
1575 EntryProbe; \
1576 ResultType ret{}; \
1577 DT_RETURN_MARK_FOR(Result, CallStatic##Result##Method, ResultType, \
1578 (const ResultType&)ret);\
1579 \
1580 va_list args; \
1581 va_start(args, methodID); \
1582 JavaValue jvalue(Tag); \
1583 JNI_ArgumentPusherVaArg ap(methodID, args); \
1584 jni_invoke_static(env, &jvalue, nullptr, JNI_STATIC, methodID, &ap, CHECK_(ResultType{})); \
1585 va_end(args); \
1586 ret = jvalue.get_##ResultType(); \
1587 return ret;\
1588 JNI_END
1589
1590 // the runtime type of subword integral basic types is integer
1591 DEFINE_CALLSTATICMETHOD(jboolean, Boolean, T_BOOLEAN
1592 , HOTSPOT_JNI_CALLSTATICBOOLEANMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1593 HOTSPOT_JNI_CALLSTATICBOOLEANMETHOD_RETURN(_ret_ref));
1594 DEFINE_CALLSTATICMETHOD(jbyte, Byte, T_BYTE
1595 , HOTSPOT_JNI_CALLSTATICBYTEMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1596 HOTSPOT_JNI_CALLSTATICBYTEMETHOD_RETURN(_ret_ref));
1597 DEFINE_CALLSTATICMETHOD(jchar, Char, T_CHAR
1598 , HOTSPOT_JNI_CALLSTATICCHARMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1599 HOTSPOT_JNI_CALLSTATICCHARMETHOD_RETURN(_ret_ref));
1600 DEFINE_CALLSTATICMETHOD(jshort, Short, T_SHORT
1601 , HOTSPOT_JNI_CALLSTATICSHORTMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1602 HOTSPOT_JNI_CALLSTATICSHORTMETHOD_RETURN(_ret_ref));
1603
1604 DEFINE_CALLSTATICMETHOD(jobject, Object, T_OBJECT
1605 , HOTSPOT_JNI_CALLSTATICOBJECTMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1606 HOTSPOT_JNI_CALLSTATICOBJECTMETHOD_RETURN(_ret_ref));
1607 DEFINE_CALLSTATICMETHOD(jint, Int, T_INT
1608 , HOTSPOT_JNI_CALLSTATICINTMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1609 HOTSPOT_JNI_CALLSTATICINTMETHOD_RETURN(_ret_ref));
1610 DEFINE_CALLSTATICMETHOD(jlong, Long, T_LONG
1611 , HOTSPOT_JNI_CALLSTATICLONGMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1612 HOTSPOT_JNI_CALLSTATICLONGMETHOD_RETURN(_ret_ref));
1613 // Float and double probes don't return value because dtrace doesn't currently support it
1614 DEFINE_CALLSTATICMETHOD(jfloat, Float, T_FLOAT
1615 , HOTSPOT_JNI_CALLSTATICFLOATMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1616 HOTSPOT_JNI_CALLSTATICFLOATMETHOD_RETURN());
1617 DEFINE_CALLSTATICMETHOD(jdouble, Double, T_DOUBLE
1618 , HOTSPOT_JNI_CALLSTATICDOUBLEMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1619 HOTSPOT_JNI_CALLSTATICDOUBLEMETHOD_RETURN());
1620
1621 #define DEFINE_CALLSTATICMETHODV(ResultType, Result, Tag \
1622 , EntryProbe, ResultProbe) \
1623 \
1624 DT_RETURN_MARK_DECL_FOR(Result, CallStatic##Result##MethodV, ResultType \
1625 , ResultProbe); \
1626 \
1627 JNI_ENTRY(ResultType, \
1628 jni_CallStatic##Result##MethodV(JNIEnv *env, jclass cls, jmethodID methodID, va_list args)) \
1629 \
1630 EntryProbe; \
1631 ResultType ret{}; \
1632 DT_RETURN_MARK_FOR(Result, CallStatic##Result##MethodV, ResultType, \
1633 (const ResultType&)ret);\
1634 \
1635 JavaValue jvalue(Tag); \
1636 JNI_ArgumentPusherVaArg ap(methodID, args); \
1637 /* Make sure class is initialized before trying to invoke its method */ \
1638 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); \
1639 k->initialize(CHECK_(ResultType{})); \
1640 jni_invoke_static(env, &jvalue, nullptr, JNI_STATIC, methodID, &ap, CHECK_(ResultType{})); \
1641 va_end(args); \
1642 ret = jvalue.get_##ResultType(); \
1643 return ret;\
1644 JNI_END
1645
1646 // the runtime type of subword integral basic types is integer
1647 DEFINE_CALLSTATICMETHODV(jboolean, Boolean, T_BOOLEAN
1648 , HOTSPOT_JNI_CALLSTATICBOOLEANMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1649 HOTSPOT_JNI_CALLSTATICBOOLEANMETHODV_RETURN(_ret_ref));
1650 DEFINE_CALLSTATICMETHODV(jbyte, Byte, T_BYTE
1651 , HOTSPOT_JNI_CALLSTATICBYTEMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1652 HOTSPOT_JNI_CALLSTATICBYTEMETHODV_RETURN(_ret_ref));
1653 DEFINE_CALLSTATICMETHODV(jchar, Char, T_CHAR
1654 , HOTSPOT_JNI_CALLSTATICCHARMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1655 HOTSPOT_JNI_CALLSTATICCHARMETHODV_RETURN(_ret_ref));
1656 DEFINE_CALLSTATICMETHODV(jshort, Short, T_SHORT
1657 , HOTSPOT_JNI_CALLSTATICSHORTMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1658 HOTSPOT_JNI_CALLSTATICSHORTMETHODV_RETURN(_ret_ref));
1659
1660 DEFINE_CALLSTATICMETHODV(jobject, Object, T_OBJECT
1661 , HOTSPOT_JNI_CALLSTATICOBJECTMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1662 HOTSPOT_JNI_CALLSTATICOBJECTMETHODV_RETURN(_ret_ref));
1663 DEFINE_CALLSTATICMETHODV(jint, Int, T_INT
1664 , HOTSPOT_JNI_CALLSTATICINTMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1665 HOTSPOT_JNI_CALLSTATICINTMETHODV_RETURN(_ret_ref));
1666 DEFINE_CALLSTATICMETHODV(jlong, Long, T_LONG
1667 , HOTSPOT_JNI_CALLSTATICLONGMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1668 HOTSPOT_JNI_CALLSTATICLONGMETHODV_RETURN(_ret_ref));
1669 // Float and double probes don't return value because dtrace doesn't currently support it
1670 DEFINE_CALLSTATICMETHODV(jfloat, Float, T_FLOAT
1671 , HOTSPOT_JNI_CALLSTATICFLOATMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1672 HOTSPOT_JNI_CALLSTATICFLOATMETHODV_RETURN());
1673 DEFINE_CALLSTATICMETHODV(jdouble, Double, T_DOUBLE
1674 , HOTSPOT_JNI_CALLSTATICDOUBLEMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1675 HOTSPOT_JNI_CALLSTATICDOUBLEMETHODV_RETURN());
1676
1677 #define DEFINE_CALLSTATICMETHODA(ResultType, Result, Tag \
1678 , EntryProbe, ResultProbe) \
1679 \
1680 DT_RETURN_MARK_DECL_FOR(Result, CallStatic##Result##MethodA, ResultType \
1681 , ResultProbe); \
1682 \
1683 JNI_ENTRY(ResultType, \
1684 jni_CallStatic##Result##MethodA(JNIEnv *env, jclass cls, jmethodID methodID, const jvalue *args)) \
1685 \
1686 EntryProbe; \
1687 ResultType ret{}; \
1688 DT_RETURN_MARK_FOR(Result, CallStatic##Result##MethodA, ResultType, \
1689 (const ResultType&)ret);\
1690 \
1691 JavaValue jvalue(Tag); \
1692 JNI_ArgumentPusherArray ap(methodID, args); \
1693 jni_invoke_static(env, &jvalue, nullptr, JNI_STATIC, methodID, &ap, CHECK_(ResultType{})); \
1694 ret = jvalue.get_##ResultType(); \
1695 return ret;\
1696 JNI_END
1697
1698 // the runtime type of subword integral basic types is integer
1699 DEFINE_CALLSTATICMETHODA(jboolean, Boolean, T_BOOLEAN
1700 , HOTSPOT_JNI_CALLSTATICBOOLEANMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1701 HOTSPOT_JNI_CALLSTATICBOOLEANMETHODA_RETURN(_ret_ref));
1702 DEFINE_CALLSTATICMETHODA(jbyte, Byte, T_BYTE
1703 , HOTSPOT_JNI_CALLSTATICBYTEMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1704 HOTSPOT_JNI_CALLSTATICBYTEMETHODA_RETURN(_ret_ref));
1705 DEFINE_CALLSTATICMETHODA(jchar, Char, T_CHAR
1706 , HOTSPOT_JNI_CALLSTATICCHARMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1707 HOTSPOT_JNI_CALLSTATICCHARMETHODA_RETURN(_ret_ref));
1708 DEFINE_CALLSTATICMETHODA(jshort, Short, T_SHORT
1709 , HOTSPOT_JNI_CALLSTATICSHORTMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1710 HOTSPOT_JNI_CALLSTATICSHORTMETHODA_RETURN(_ret_ref));
1711
1712 DEFINE_CALLSTATICMETHODA(jobject, Object, T_OBJECT
1713 , HOTSPOT_JNI_CALLSTATICOBJECTMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1714 HOTSPOT_JNI_CALLSTATICOBJECTMETHODA_RETURN(_ret_ref));
1715 DEFINE_CALLSTATICMETHODA(jint, Int, T_INT
1716 , HOTSPOT_JNI_CALLSTATICINTMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1717 HOTSPOT_JNI_CALLSTATICINTMETHODA_RETURN(_ret_ref));
1718 DEFINE_CALLSTATICMETHODA(jlong, Long, T_LONG
1719 , HOTSPOT_JNI_CALLSTATICLONGMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1720 HOTSPOT_JNI_CALLSTATICLONGMETHODA_RETURN(_ret_ref));
1721 // Float and double probes don't return value because dtrace doesn't currently support it
1722 DEFINE_CALLSTATICMETHODA(jfloat, Float, T_FLOAT
1723 , HOTSPOT_JNI_CALLSTATICFLOATMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1724 HOTSPOT_JNI_CALLSTATICFLOATMETHODA_RETURN());
1725 DEFINE_CALLSTATICMETHODA(jdouble, Double, T_DOUBLE
1726 , HOTSPOT_JNI_CALLSTATICDOUBLEMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1727 HOTSPOT_JNI_CALLSTATICDOUBLEMETHODA_RETURN());
1728
1729 DT_VOID_RETURN_MARK_DECL(CallStaticVoidMethod
1730 , HOTSPOT_JNI_CALLSTATICVOIDMETHOD_RETURN());
1731 DT_VOID_RETURN_MARK_DECL(CallStaticVoidMethodV
1732 , HOTSPOT_JNI_CALLSTATICVOIDMETHODV_RETURN());
1733 DT_VOID_RETURN_MARK_DECL(CallStaticVoidMethodA
1734 , HOTSPOT_JNI_CALLSTATICVOIDMETHODA_RETURN());
1735
1736 JNI_ENTRY(void, jni_CallStaticVoidMethod(JNIEnv *env, jclass cls, jmethodID methodID, ...))
1737 HOTSPOT_JNI_CALLSTATICVOIDMETHOD_ENTRY(env, cls, (uintptr_t) methodID);
1738 DT_VOID_RETURN_MARK(CallStaticVoidMethod);
1739
1740 va_list args;
1741 va_start(args, methodID);
1742 JavaValue jvalue(T_VOID);
1743 JNI_ArgumentPusherVaArg ap(methodID, args);
1744 jni_invoke_static(env, &jvalue, nullptr, JNI_STATIC, methodID, &ap, CHECK);
1745 va_end(args);
1746 JNI_END
1747
1748
1749 JNI_ENTRY(void, jni_CallStaticVoidMethodV(JNIEnv *env, jclass cls, jmethodID methodID, va_list args))
1750 HOTSPOT_JNI_CALLSTATICVOIDMETHODV_ENTRY(env, cls, (uintptr_t) methodID);
1751 DT_VOID_RETURN_MARK(CallStaticVoidMethodV);
1752
1753 JavaValue jvalue(T_VOID);
1754 JNI_ArgumentPusherVaArg ap(methodID, args);
1755 jni_invoke_static(env, &jvalue, nullptr, JNI_STATIC, methodID, &ap, CHECK);
1756 JNI_END
1757
1758
1759 JNI_ENTRY(void, jni_CallStaticVoidMethodA(JNIEnv *env, jclass cls, jmethodID methodID, const jvalue *args))
1760 HOTSPOT_JNI_CALLSTATICVOIDMETHODA_ENTRY(env, cls, (uintptr_t) methodID);
1761 DT_VOID_RETURN_MARK(CallStaticVoidMethodA);
1762
1763 JavaValue jvalue(T_VOID);
1764 JNI_ArgumentPusherArray ap(methodID, args);
1765 jni_invoke_static(env, &jvalue, nullptr, JNI_STATIC, methodID, &ap, CHECK);
1766 JNI_END
1767
1768
1769 //
1770 // Accessing Fields
1771 //
1772
1773
1774 DT_RETURN_MARK_DECL(GetFieldID, jfieldID
1775 , HOTSPOT_JNI_GETFIELDID_RETURN((uintptr_t)_ret_ref));
1776
1777 JNI_ENTRY(jfieldID, jni_GetFieldID(JNIEnv *env, jclass clazz,
1778 const char *name, const char *sig))
1779 HOTSPOT_JNI_GETFIELDID_ENTRY(env, clazz, (char *) name, (char *) sig);
1780 jfieldID ret = nullptr;
1781 DT_RETURN_MARK(GetFieldID, jfieldID, (const jfieldID&)ret);
1782
1783 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz));
1784
1785 // The class should have been loaded (we have an instance of the class
1786 // passed in) so the field and signature should already be in the symbol
1787 // table. If they're not there, the field doesn't exist.
1788 TempNewSymbol fieldname = SymbolTable::probe(name, (int)strlen(name));
1789 TempNewSymbol signame = SymbolTable::probe(sig, (int)strlen(sig));
1790 if (fieldname == nullptr || signame == nullptr) {
1791 ResourceMark rm;
1792 THROW_MSG_NULL(vmSymbols::java_lang_NoSuchFieldError(), err_msg("%s.%s %s", k->external_name(), name, sig));
1793 }
1794
1795 // Make sure class is initialized before handing id's out to fields
1796 k->initialize(CHECK_NULL);
1797
1798 fieldDescriptor fd;
1799 if (!k->is_instance_klass() ||
1800 !InstanceKlass::cast(k)->find_field(fieldname, signame, false, &fd)) {
1801 ResourceMark rm;
1802 THROW_MSG_NULL(vmSymbols::java_lang_NoSuchFieldError(), err_msg("%s.%s %s", k->external_name(), name, sig));
1803 }
1804
1805 // A jfieldID for a non-static field is simply the offset of the field within the instanceOop
1806 // It may also have hash bits for k, if VerifyJNIFields is turned on.
1807 ret = jfieldIDWorkaround::to_instance_jfieldID(k, fd.offset(), fd.is_flat());
1808 return ret;
1809 JNI_END
1810
1811
1812 JNI_ENTRY(jobject, jni_GetObjectField(JNIEnv *env, jobject obj, jfieldID fieldID))
1813 HOTSPOT_JNI_GETOBJECTFIELD_ENTRY(env, obj, (uintptr_t) fieldID);
1814 oop o = JNIHandles::resolve_non_null(obj);
1815 Klass* k = o->klass();
1816 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID);
1817 oop res = nullptr;
1818 // Keep JVMTI addition small and only check enabled flag here.
1819 // jni_GetField_probe() assumes that is okay to create handles.
1820 if (JvmtiExport::should_post_field_access()) {
1821 o = JvmtiExport::jni_GetField_probe(thread, obj, o, k, fieldID, false);
1822 }
1823 if (!jfieldIDWorkaround::is_flat_jfieldID(fieldID)) {
1824 res = HeapAccess<ON_UNKNOWN_OOP_REF>::oop_load_at(o, offset);
1825 } else {
1826 InstanceKlass* ik = InstanceKlass::cast(k);
1827 fieldDescriptor fd;
1828 bool found = ik->find_field_from_offset(offset, false, &fd); // performance bottleneck
1829 assert(found, "Field not found");
1830 FlatFieldPayload payload(instanceOop(o), &fd);
1831 res = payload.read(CHECK_NULL);
1832 }
1833 jobject ret = JNIHandles::make_local(THREAD, res);
1834 HOTSPOT_JNI_GETOBJECTFIELD_RETURN(ret);
1835 return ret;
1836 JNI_END
1837
1838 #define DEFINE_GETFIELD(Return,Fieldname,Result \
1839 , EntryProbe, ReturnProbe) \
1840 \
1841 DT_RETURN_MARK_DECL_FOR(Result, Get##Result##Field, Return \
1842 , ReturnProbe); \
1843 \
1844 JNI_ENTRY_NO_PRESERVE(Return, jni_Get##Result##Field(JNIEnv *env, jobject obj, jfieldID fieldID)) \
1845 \
1846 EntryProbe; \
1847 Return ret = 0;\
1848 DT_RETURN_MARK_FOR(Result, Get##Result##Field, Return, (const Return&)ret);\
1849 \
1850 oop o = JNIHandles::resolve_non_null(obj); \
1851 Klass* k = o->klass(); \
1852 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID); \
1853 /* Keep JVMTI addition small and only check enabled flag here. */ \
1854 if (JvmtiExport::should_post_field_access()) { \
1855 o = JvmtiExport::jni_GetField_probe(thread, obj, o, k, fieldID, false); \
1856 } \
1857 ret = o->Fieldname##_field(offset); \
1858 return ret; \
1859 JNI_END
1860
1861 DEFINE_GETFIELD(jboolean, bool, Boolean
1862 , HOTSPOT_JNI_GETBOOLEANFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
1863 HOTSPOT_JNI_GETBOOLEANFIELD_RETURN(_ret_ref))
1864 DEFINE_GETFIELD(jbyte, byte, Byte
1865 , HOTSPOT_JNI_GETBYTEFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
1866 HOTSPOT_JNI_GETBYTEFIELD_RETURN(_ret_ref))
1867 DEFINE_GETFIELD(jchar, char, Char
1868 , HOTSPOT_JNI_GETCHARFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
1869 HOTSPOT_JNI_GETCHARFIELD_RETURN(_ret_ref))
1870 DEFINE_GETFIELD(jshort, short, Short
1871 , HOTSPOT_JNI_GETSHORTFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
1872 HOTSPOT_JNI_GETSHORTFIELD_RETURN(_ret_ref))
1873 DEFINE_GETFIELD(jint, int, Int
1874 , HOTSPOT_JNI_GETINTFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
1875 HOTSPOT_JNI_GETINTFIELD_RETURN(_ret_ref))
1876 DEFINE_GETFIELD(jlong, long, Long
1877 , HOTSPOT_JNI_GETLONGFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
1878 HOTSPOT_JNI_GETLONGFIELD_RETURN(_ret_ref))
1879 // Float and double probes don't return value because dtrace doesn't currently support it
1880 DEFINE_GETFIELD(jfloat, float, Float
1881 , HOTSPOT_JNI_GETFLOATFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
1882 HOTSPOT_JNI_GETFLOATFIELD_RETURN())
1883 DEFINE_GETFIELD(jdouble, double, Double
1884 , HOTSPOT_JNI_GETDOUBLEFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
1885 HOTSPOT_JNI_GETDOUBLEFIELD_RETURN())
1886
1887 address jni_GetBooleanField_addr() {
1888 return (address)jni_GetBooleanField;
1889 }
1890 address jni_GetByteField_addr() {
1891 return (address)jni_GetByteField;
1892 }
1893 address jni_GetCharField_addr() {
1894 return (address)jni_GetCharField;
1895 }
1896 address jni_GetShortField_addr() {
1897 return (address)jni_GetShortField;
1898 }
1899 address jni_GetIntField_addr() {
1900 return (address)jni_GetIntField;
1901 }
1902 address jni_GetLongField_addr() {
1903 return (address)jni_GetLongField;
1904 }
1905 address jni_GetFloatField_addr() {
1906 return (address)jni_GetFloatField;
1907 }
1908 address jni_GetDoubleField_addr() {
1909 return (address)jni_GetDoubleField;
1910 }
1911
1912 static void log_debug_if_final_static_field(JavaThread* current, const char* func_name, InstanceKlass* ik, int offset) {
1913 if (log_is_enabled(Debug, jni)) {
1914 fieldDescriptor fd;
1915 bool found = ik->find_field_from_offset(offset, true, &fd);
1916 assert(found, "bad field offset");
1917 assert(fd.is_static(), "static/instance mismatch");
1918 if (fd.is_final() && !fd.is_mutable_static_final()) {
1919 ResourceMark rm(current);
1920 log_debug(jni)("%s mutated final static field %s.%s", func_name, ik->external_name(), fd.name()->as_C_string());
1921 }
1922 }
1923 }
1924
1925 static void log_debug_if_final_instance_field(JavaThread* current, const char* func_name, InstanceKlass* ik, int offset) {
1926 if (log_is_enabled(Debug, jni)) {
1927 fieldDescriptor fd;
1928 bool found = ik->find_field_from_offset(offset, false, &fd);
1929 assert(found, "bad field offset");
1930 assert(!fd.is_static(), "static/instance mismatch");
1931 if (fd.is_final()) {
1932 ResourceMark rm(current);
1933 log_debug(jni)("%s mutated final instance field %s.%s", func_name, ik->external_name(), fd.name()->as_C_string());
1934 }
1935 }
1936 }
1937
1938 JNI_ENTRY_NO_PRESERVE(void, jni_SetObjectField(JNIEnv *env, jobject obj, jfieldID fieldID, jobject value))
1939 HOTSPOT_JNI_SETOBJECTFIELD_ENTRY(env, obj, (uintptr_t) fieldID, value);
1940 oop o = JNIHandles::resolve_non_null(obj);
1941 Klass* k = o->klass();
1942 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID);
1943 // Keep JVMTI addition small and only check enabled flag here.
1944 if (JvmtiExport::should_post_field_modification()) {
1945 jvalue field_value;
1946 field_value.l = value;
1947 o = JvmtiExport::jni_SetField_probe(thread, obj, o, k, fieldID, false, JVM_SIGNATURE_CLASS, (jvalue *)&field_value);
1948 }
1949 if (!jfieldIDWorkaround::is_flat_jfieldID(fieldID)) {
1950 oop v = JNIHandles::resolve(value);
1951 if (v == nullptr) {
1952 InstanceKlass *ik = InstanceKlass::cast(k);
1953 fieldDescriptor fd;
1954 ik->find_field_from_offset(offset, false, &fd);
1955 if (fd.is_null_free_inline_type()) {
1956 THROW_MSG(vmSymbols::java_lang_NullPointerException(), "Cannot store null in a null-restricted field");
1957 }
1958 }
1959 HeapAccess<ON_UNKNOWN_OOP_REF>::oop_store_at(o, offset, v);
1960 } else {
1961 assert(k->is_instance_klass(), "Only instances can have flat fields");
1962 InstanceKlass* ik = InstanceKlass::cast(k);
1963 fieldDescriptor fd;
1964 ik->find_field_from_offset(offset, false, &fd);
1965 FlatFieldPayload payload(instanceOop(o), &fd);
1966 payload.write(inlineOop(JNIHandles::resolve(value)), CHECK);
1967 }
1968 log_debug_if_final_instance_field(thread, "SetObjectField", InstanceKlass::cast(k), offset);
1969 HOTSPOT_JNI_SETOBJECTFIELD_RETURN();
1970 JNI_END
1971
1972 // TODO: make this a template
1973
1974 #define DEFINE_SETFIELD(Argument,Fieldname,Result,SigType,unionType \
1975 , EntryProbe, ReturnProbe) \
1976 \
1977 JNI_ENTRY_NO_PRESERVE(void, jni_Set##Result##Field(JNIEnv *env, jobject obj, jfieldID fieldID, Argument value)) \
1978 \
1979 EntryProbe; \
1980 \
1981 oop o = JNIHandles::resolve_non_null(obj); \
1982 Klass* k = o->klass(); \
1983 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID); \
1984 /* Keep JVMTI addition small and only check enabled flag here. */ \
1985 if (JvmtiExport::should_post_field_modification()) { \
1986 jvalue field_value; \
1987 field_value.unionType = value; \
1988 o = JvmtiExport::jni_SetField_probe(thread, obj, o, k, fieldID, false, SigType, (jvalue *)&field_value); \
1989 } \
1990 o->Fieldname##_field_put(offset, value); \
1991 log_debug_if_final_instance_field(thread, "Set<Type>Field", InstanceKlass::cast(k), offset); \
1992 ReturnProbe; \
1993 JNI_END
1994
1995 DEFINE_SETFIELD(jboolean, bool, Boolean, JVM_SIGNATURE_BOOLEAN, z
1996 , HOTSPOT_JNI_SETBOOLEANFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value),
1997 HOTSPOT_JNI_SETBOOLEANFIELD_RETURN())
1998 DEFINE_SETFIELD(jbyte, byte, Byte, JVM_SIGNATURE_BYTE, b
1999 , HOTSPOT_JNI_SETBYTEFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value),
2000 HOTSPOT_JNI_SETBYTEFIELD_RETURN())
2001 DEFINE_SETFIELD(jchar, char, Char, JVM_SIGNATURE_CHAR, c
2002 , HOTSPOT_JNI_SETCHARFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value),
2003 HOTSPOT_JNI_SETCHARFIELD_RETURN())
2004 DEFINE_SETFIELD(jshort, short, Short, JVM_SIGNATURE_SHORT, s
2005 , HOTSPOT_JNI_SETSHORTFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value),
2006 HOTSPOT_JNI_SETSHORTFIELD_RETURN())
2007 DEFINE_SETFIELD(jint, int, Int, JVM_SIGNATURE_INT, i
2008 , HOTSPOT_JNI_SETINTFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value),
2009 HOTSPOT_JNI_SETINTFIELD_RETURN())
2010 DEFINE_SETFIELD(jlong, long, Long, JVM_SIGNATURE_LONG, j
2011 , HOTSPOT_JNI_SETLONGFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value),
2012 HOTSPOT_JNI_SETLONGFIELD_RETURN())
2013 // Float and double probes don't return value because dtrace doesn't currently support it
2014 DEFINE_SETFIELD(jfloat, float, Float, JVM_SIGNATURE_FLOAT, f
2015 , HOTSPOT_JNI_SETFLOATFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2016 HOTSPOT_JNI_SETFLOATFIELD_RETURN())
2017 DEFINE_SETFIELD(jdouble, double, Double, JVM_SIGNATURE_DOUBLE, d
2018 , HOTSPOT_JNI_SETDOUBLEFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2019 HOTSPOT_JNI_SETDOUBLEFIELD_RETURN())
2020
2021 DT_RETURN_MARK_DECL(ToReflectedField, jobject
2022 , HOTSPOT_JNI_TOREFLECTEDFIELD_RETURN(_ret_ref));
2023
2024 JNI_ENTRY(jobject, jni_ToReflectedField(JNIEnv *env, jclass cls, jfieldID fieldID, jboolean isStatic))
2025 HOTSPOT_JNI_TOREFLECTEDFIELD_ENTRY(env, cls, (uintptr_t) fieldID, isStatic);
2026 jobject ret = nullptr;
2027 DT_RETURN_MARK(ToReflectedField, jobject, (const jobject&)ret);
2028
2029 fieldDescriptor fd;
2030 bool found = false;
2031 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2032
2033 assert(jfieldIDWorkaround::is_static_jfieldID(fieldID) == (isStatic != 0), "invalid fieldID");
2034
2035 if (isStatic) {
2036 // Static field. The fieldID a JNIid specifying the field holder and the offset within the Klass*.
2037 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID);
2038 assert(id->is_static_field_id(), "invalid static field id");
2039 found = id->find_local_field(&fd);
2040 } else {
2041 // Non-static field. The fieldID is really the offset of the field within the instanceOop.
2042 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID);
2043 found = InstanceKlass::cast(k)->find_field_from_offset(offset, false, &fd);
2044 }
2045 assert(found, "bad fieldID passed into jni_ToReflectedField");
2046 oop reflected = Reflection::new_field(&fd, CHECK_NULL);
2047 ret = JNIHandles::make_local(THREAD, reflected);
2048 return ret;
2049 JNI_END
2050
2051
2052 //
2053 // Accessing Static Fields
2054 //
2055 DT_RETURN_MARK_DECL(GetStaticFieldID, jfieldID
2056 , HOTSPOT_JNI_GETSTATICFIELDID_RETURN((uintptr_t)_ret_ref));
2057
2058 JNI_ENTRY(jfieldID, jni_GetStaticFieldID(JNIEnv *env, jclass clazz,
2059 const char *name, const char *sig))
2060 HOTSPOT_JNI_GETSTATICFIELDID_ENTRY(env, clazz, (char *) name, (char *) sig);
2061 jfieldID ret = nullptr;
2062 DT_RETURN_MARK(GetStaticFieldID, jfieldID, (const jfieldID&)ret);
2063
2064 // The class should have been loaded (we have an instance of the class
2065 // passed in) so the field and signature should already be in the symbol
2066 // table. If they're not there, the field doesn't exist.
2067 TempNewSymbol fieldname = SymbolTable::probe(name, (int)strlen(name));
2068 TempNewSymbol signame = SymbolTable::probe(sig, (int)strlen(sig));
2069 if (fieldname == nullptr || signame == nullptr) {
2070 THROW_MSG_NULL(vmSymbols::java_lang_NoSuchFieldError(), (char*) name);
2071 }
2072 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz));
2073 // Make sure class is initialized before handing id's out to static fields
2074 k->initialize(CHECK_NULL);
2075
2076 fieldDescriptor fd;
2077 if (!k->is_instance_klass() ||
2078 !InstanceKlass::cast(k)->find_field(fieldname, signame, true, &fd)) {
2079 THROW_MSG_NULL(vmSymbols::java_lang_NoSuchFieldError(), (char*) name);
2080 }
2081
2082 // A jfieldID for a static field is a JNIid specifying the field holder and the offset within the Klass*
2083 JNIid* id = fd.field_holder()->jni_id_for(fd.offset());
2084 DEBUG_ONLY(id->set_is_static_field_id();)
2085
2086 DEBUG_ONLY(id->verify(fd.field_holder()));
2087
2088 ret = jfieldIDWorkaround::to_static_jfieldID(id);
2089 return ret;
2090 JNI_END
2091
2092
2093 JNI_ENTRY(jobject, jni_GetStaticObjectField(JNIEnv *env, jclass clazz, jfieldID fieldID))
2094 HOTSPOT_JNI_GETSTATICOBJECTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID);
2095 #if INCLUDE_JNI_CHECK
2096 DEBUG_ONLY(Klass* param_k = jniCheck::validate_class(thread, clazz);)
2097 #endif // INCLUDE_JNI_CHECK
2098 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID);
2099 assert(id->is_static_field_id(), "invalid static field id");
2100 // Keep JVMTI addition small and only check enabled flag here.
2101 // jni_GetField_probe() assumes that is okay to create handles.
2102 if (JvmtiExport::should_post_field_access()) {
2103 JvmtiExport::jni_GetField_probe(thread, nullptr, nullptr, id->holder(), fieldID, true);
2104 }
2105 jobject ret = JNIHandles::make_local(THREAD, id->holder()->java_mirror()->obj_field(id->offset()));
2106 HOTSPOT_JNI_GETSTATICOBJECTFIELD_RETURN(ret);
2107 return ret;
2108 JNI_END
2109
2110
2111 #define DEFINE_GETSTATICFIELD(Return,Fieldname,Result \
2112 , EntryProbe, ReturnProbe) \
2113 \
2114 DT_RETURN_MARK_DECL_FOR(Result, GetStatic##Result##Field, Return \
2115 , ReturnProbe); \
2116 \
2117 JNI_ENTRY(Return, jni_GetStatic##Result##Field(JNIEnv *env, jclass clazz, jfieldID fieldID)) \
2118 EntryProbe; \
2119 Return ret = 0;\
2120 DT_RETURN_MARK_FOR(Result, GetStatic##Result##Field, Return, \
2121 (const Return&)ret);\
2122 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID); \
2123 assert(id->is_static_field_id(), "invalid static field id"); \
2124 /* Keep JVMTI addition small and only check enabled flag here. */ \
2125 /* jni_GetField_probe() assumes that is okay to create handles. */ \
2126 if (JvmtiExport::should_post_field_access()) { \
2127 JvmtiExport::jni_GetField_probe(thread, nullptr, nullptr, id->holder(), fieldID, true); \
2128 } \
2129 ret = id->holder()->java_mirror()-> Fieldname##_field (id->offset()); \
2130 return ret;\
2131 JNI_END
2132
2133 DEFINE_GETSTATICFIELD(jboolean, bool, Boolean
2134 , HOTSPOT_JNI_GETSTATICBOOLEANFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICBOOLEANFIELD_RETURN(_ret_ref))
2135 DEFINE_GETSTATICFIELD(jbyte, byte, Byte
2136 , HOTSPOT_JNI_GETSTATICBYTEFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICBYTEFIELD_RETURN(_ret_ref) )
2137 DEFINE_GETSTATICFIELD(jchar, char, Char
2138 , HOTSPOT_JNI_GETSTATICCHARFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICCHARFIELD_RETURN(_ret_ref) )
2139 DEFINE_GETSTATICFIELD(jshort, short, Short
2140 , HOTSPOT_JNI_GETSTATICSHORTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICSHORTFIELD_RETURN(_ret_ref) )
2141 DEFINE_GETSTATICFIELD(jint, int, Int
2142 , HOTSPOT_JNI_GETSTATICINTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICINTFIELD_RETURN(_ret_ref) )
2143 DEFINE_GETSTATICFIELD(jlong, long, Long
2144 , HOTSPOT_JNI_GETSTATICLONGFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICLONGFIELD_RETURN(_ret_ref) )
2145 // Float and double probes don't return value because dtrace doesn't currently support it
2146 DEFINE_GETSTATICFIELD(jfloat, float, Float
2147 , HOTSPOT_JNI_GETSTATICFLOATFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICFLOATFIELD_RETURN() )
2148 DEFINE_GETSTATICFIELD(jdouble, double, Double
2149 , HOTSPOT_JNI_GETSTATICDOUBLEFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICDOUBLEFIELD_RETURN() )
2150
2151 JNI_ENTRY(void, jni_SetStaticObjectField(JNIEnv *env, jclass clazz, jfieldID fieldID, jobject value))
2152 HOTSPOT_JNI_SETSTATICOBJECTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value);
2153 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID);
2154 assert(id->is_static_field_id(), "invalid static field id");
2155 // Keep JVMTI addition small and only check enabled flag here.
2156 // jni_SetField_probe() assumes that is okay to create handles.
2157 if (JvmtiExport::should_post_field_modification()) {
2158 jvalue field_value;
2159 field_value.l = value;
2160 JvmtiExport::jni_SetField_probe(thread, nullptr, nullptr, id->holder(), fieldID, true, JVM_SIGNATURE_CLASS, (jvalue *)&field_value);
2161 }
2162 id->holder()->java_mirror()->obj_field_put(id->offset(), JNIHandles::resolve(value));
2163 log_debug_if_final_static_field(THREAD, "SetStaticObjectField", id->holder(), id->offset());
2164 HOTSPOT_JNI_SETSTATICOBJECTFIELD_RETURN();
2165 JNI_END
2166
2167
2168
2169 #define DEFINE_SETSTATICFIELD(Argument,Fieldname,Result,SigType,unionType \
2170 , EntryProbe, ReturnProbe) \
2171 \
2172 JNI_ENTRY(void, jni_SetStatic##Result##Field(JNIEnv *env, jclass clazz, jfieldID fieldID, Argument value)) \
2173 EntryProbe; \
2174 \
2175 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID); \
2176 assert(id->is_static_field_id(), "invalid static field id"); \
2177 /* Keep JVMTI addition small and only check enabled flag here. */ \
2178 /* jni_SetField_probe() assumes that is okay to create handles. */ \
2179 if (JvmtiExport::should_post_field_modification()) { \
2180 jvalue field_value; \
2181 field_value.unionType = value; \
2182 JvmtiExport::jni_SetField_probe(thread, nullptr, nullptr, id->holder(), fieldID, true, SigType, (jvalue *)&field_value); \
2183 } \
2184 id->holder()->java_mirror()-> Fieldname##_field_put (id->offset(), value); \
2185 log_debug_if_final_static_field(THREAD, "SetStatic<Type>Field", id->holder(), id->offset()); \
2186 ReturnProbe;\
2187 JNI_END
2188
2189 DEFINE_SETSTATICFIELD(jboolean, bool, Boolean, JVM_SIGNATURE_BOOLEAN, z
2190 , HOTSPOT_JNI_SETSTATICBOOLEANFIELD_ENTRY(env, clazz, (uintptr_t)fieldID, value),
2191 HOTSPOT_JNI_SETSTATICBOOLEANFIELD_RETURN())
2192 DEFINE_SETSTATICFIELD(jbyte, byte, Byte, JVM_SIGNATURE_BYTE, b
2193 , HOTSPOT_JNI_SETSTATICBYTEFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value),
2194 HOTSPOT_JNI_SETSTATICBYTEFIELD_RETURN())
2195 DEFINE_SETSTATICFIELD(jchar, char, Char, JVM_SIGNATURE_CHAR, c
2196 , HOTSPOT_JNI_SETSTATICCHARFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value),
2197 HOTSPOT_JNI_SETSTATICCHARFIELD_RETURN())
2198 DEFINE_SETSTATICFIELD(jshort, short, Short, JVM_SIGNATURE_SHORT, s
2199 , HOTSPOT_JNI_SETSTATICSHORTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value),
2200 HOTSPOT_JNI_SETSTATICSHORTFIELD_RETURN())
2201 DEFINE_SETSTATICFIELD(jint, int, Int, JVM_SIGNATURE_INT, i
2202 , HOTSPOT_JNI_SETSTATICINTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value),
2203 HOTSPOT_JNI_SETSTATICINTFIELD_RETURN())
2204 DEFINE_SETSTATICFIELD(jlong, long, Long, JVM_SIGNATURE_LONG, j
2205 , HOTSPOT_JNI_SETSTATICLONGFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value),
2206 HOTSPOT_JNI_SETSTATICLONGFIELD_RETURN())
2207 // Float and double probes don't return value because dtrace doesn't currently support it
2208 DEFINE_SETSTATICFIELD(jfloat, float, Float, JVM_SIGNATURE_FLOAT, f
2209 , HOTSPOT_JNI_SETSTATICFLOATFIELD_ENTRY(env, clazz, (uintptr_t) fieldID),
2210 HOTSPOT_JNI_SETSTATICFLOATFIELD_RETURN())
2211 DEFINE_SETSTATICFIELD(jdouble, double, Double, JVM_SIGNATURE_DOUBLE, d
2212 , HOTSPOT_JNI_SETSTATICDOUBLEFIELD_ENTRY(env, clazz, (uintptr_t) fieldID),
2213 HOTSPOT_JNI_SETSTATICDOUBLEFIELD_RETURN())
2214
2215 //
2216 // String Operations
2217 //
2218
2219 // Unicode Interface
2220
2221 DT_RETURN_MARK_DECL(NewString, jstring
2222 , HOTSPOT_JNI_NEWSTRING_RETURN(_ret_ref));
2223
2224 JNI_ENTRY(jstring, jni_NewString(JNIEnv *env, const jchar *unicodeChars, jsize len))
2225 HOTSPOT_JNI_NEWSTRING_ENTRY(env, (uint16_t *) unicodeChars, len);
2226 jstring ret = nullptr;
2227 DT_RETURN_MARK(NewString, jstring, (const jstring&)ret);
2228 oop string=java_lang_String::create_oop_from_unicode((jchar*) unicodeChars, len, CHECK_NULL);
2229 ret = (jstring) JNIHandles::make_local(THREAD, string);
2230 return ret;
2231 JNI_END
2232
2233
2234 JNI_ENTRY_NO_PRESERVE(jsize, jni_GetStringLength(JNIEnv *env, jstring string))
2235 HOTSPOT_JNI_GETSTRINGLENGTH_ENTRY(env, string);
2236 jsize ret = 0;
2237 oop s = JNIHandles::resolve_non_null(string);
2238 ret = java_lang_String::length(s);
2239 HOTSPOT_JNI_GETSTRINGLENGTH_RETURN(ret);
2240 return ret;
2241 JNI_END
2242
2243
2244 JNI_ENTRY_NO_PRESERVE(const jchar*, jni_GetStringChars(
2245 JNIEnv *env, jstring string, jboolean *isCopy))
2246 HOTSPOT_JNI_GETSTRINGCHARS_ENTRY(env, string, (uintptr_t *) isCopy);
2247 jchar* buf = nullptr;
2248 oop s = JNIHandles::resolve_non_null(string);
2249 typeArrayOop s_value = java_lang_String::value(s);
2250 if (s_value != nullptr) {
2251 int s_len = java_lang_String::length(s, s_value);
2252 bool is_latin1 = java_lang_String::is_latin1(s);
2253 buf = NEW_C_HEAP_ARRAY_RETURN_NULL(jchar, s_len + 1, mtInternal); // add one for zero termination
2254 /* JNI Specification states return null on OOM */
2255 if (buf != nullptr) {
2256 if (s_len > 0) {
2257 if (!is_latin1) {
2258 ArrayAccess<>::arraycopy_to_native(s_value, (size_t) typeArrayOopDesc::element_offset<jchar>(0),
2259 buf, s_len);
2260 } else {
2261 for (int i = 0; i < s_len; i++) {
2262 buf[i] = ((jchar) s_value->byte_at(i)) & 0xff;
2263 }
2264 }
2265 }
2266 buf[s_len] = 0;
2267 //%note jni_5
2268 if (isCopy != nullptr) {
2269 *isCopy = JNI_TRUE;
2270 }
2271 }
2272 }
2273 HOTSPOT_JNI_GETSTRINGCHARS_RETURN(buf);
2274 return buf;
2275 JNI_END
2276
2277
2278 JNI_ENTRY_NO_PRESERVE(void, jni_ReleaseStringChars(JNIEnv *env, jstring str, const jchar *chars))
2279 HOTSPOT_JNI_RELEASESTRINGCHARS_ENTRY(env, str, (uint16_t *) chars);
2280 //%note jni_6
2281 if (chars != nullptr) {
2282 // Since String objects are supposed to be immutable, don't copy any
2283 // new data back. A bad user will have to go after the char array.
2284 FreeHeap((void*) chars);
2285 }
2286 HOTSPOT_JNI_RELEASESTRINGCHARS_RETURN();
2287 JNI_END
2288
2289
2290 // UTF Interface
2291
2292 DT_RETURN_MARK_DECL(NewStringUTF, jstring
2293 , HOTSPOT_JNI_NEWSTRINGUTF_RETURN(_ret_ref));
2294
2295 JNI_ENTRY(jstring, jni_NewStringUTF(JNIEnv *env, const char *bytes))
2296 HOTSPOT_JNI_NEWSTRINGUTF_ENTRY(env, (char *) bytes);
2297 jstring ret;
2298 DT_RETURN_MARK(NewStringUTF, jstring, (const jstring&)ret);
2299
2300 oop result = java_lang_String::create_oop_from_str((char*) bytes, CHECK_NULL);
2301 ret = (jstring) JNIHandles::make_local(THREAD, result);
2302 return ret;
2303 JNI_END
2304
2305
2306 JNI_ENTRY(jsize, jni_GetStringUTFLength(JNIEnv *env, jstring string))
2307 HOTSPOT_JNI_GETSTRINGUTFLENGTH_ENTRY(env, string);
2308 oop java_string = JNIHandles::resolve_non_null(string);
2309 jsize ret = java_lang_String::utf8_length_as_int(java_string);
2310 HOTSPOT_JNI_GETSTRINGUTFLENGTH_RETURN(ret);
2311 return ret;
2312 JNI_END
2313
2314 JNI_ENTRY(jlong, jni_GetStringUTFLengthAsLong(JNIEnv *env, jstring string))
2315 HOTSPOT_JNI_GETSTRINGUTFLENGTHASLONG_ENTRY(env, string);
2316 oop java_string = JNIHandles::resolve_non_null(string);
2317 size_t ret = java_lang_String::utf8_length(java_string);
2318 HOTSPOT_JNI_GETSTRINGUTFLENGTHASLONG_RETURN(ret);
2319 return checked_cast<jlong>(ret);
2320 JNI_END
2321
2322
2323 JNI_ENTRY(const char*, jni_GetStringUTFChars(JNIEnv *env, jstring string, jboolean *isCopy))
2324 HOTSPOT_JNI_GETSTRINGUTFCHARS_ENTRY(env, string, (uintptr_t *) isCopy);
2325 char* result = nullptr;
2326 oop java_string = JNIHandles::resolve_non_null(string);
2327 typeArrayOop s_value = java_lang_String::value(java_string);
2328 if (s_value != nullptr) {
2329 size_t length = java_lang_String::utf8_length(java_string, s_value);
2330 // JNI Specification states return null on OOM.
2331 // The resulting sequence doesn't have to be NUL-terminated but we do.
2332 result = AllocateHeap(length + 1, mtInternal, AllocFailStrategy::RETURN_NULL);
2333 if (result != nullptr) {
2334 java_lang_String::as_utf8_string(java_string, s_value, result, length + 1);
2335 if (isCopy != nullptr) {
2336 *isCopy = JNI_TRUE;
2337 }
2338 }
2339 }
2340 HOTSPOT_JNI_GETSTRINGUTFCHARS_RETURN(result);
2341 return result;
2342 JNI_END
2343
2344
2345 JNI_LEAF(void, jni_ReleaseStringUTFChars(JNIEnv *env, jstring str, const char *chars))
2346 HOTSPOT_JNI_RELEASESTRINGUTFCHARS_ENTRY(env, str, (char *) chars);
2347 if (chars != nullptr) {
2348 FreeHeap((char*) chars);
2349 }
2350 HOTSPOT_JNI_RELEASESTRINGUTFCHARS_RETURN();
2351 JNI_END
2352
2353
2354 JNI_ENTRY_NO_PRESERVE(jsize, jni_GetArrayLength(JNIEnv *env, jarray array))
2355 HOTSPOT_JNI_GETARRAYLENGTH_ENTRY(env, array);
2356 arrayOop a = arrayOop(JNIHandles::resolve_non_null(array));
2357 assert(a->is_array(), "must be array");
2358 jsize ret = a->length();
2359 HOTSPOT_JNI_GETARRAYLENGTH_RETURN(ret);
2360 return ret;
2361 JNI_END
2362
2363
2364 //
2365 // Object Array Operations
2366 //
2367
2368 DT_RETURN_MARK_DECL(NewObjectArray, jobjectArray
2369 , HOTSPOT_JNI_NEWOBJECTARRAY_RETURN(_ret_ref));
2370
2371 JNI_ENTRY(jobjectArray, jni_NewObjectArray(JNIEnv *env, jsize length, jclass elementClass, jobject initialElement))
2372 HOTSPOT_JNI_NEWOBJECTARRAY_ENTRY(env, length, elementClass, initialElement);
2373 jobjectArray ret = nullptr;
2374 DT_RETURN_MARK(NewObjectArray, jobjectArray, (const jobjectArray&)ret);
2375 Klass* ek = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(elementClass));
2376
2377 // Make sure bottom_klass is initialized.
2378 ek->initialize(CHECK_NULL);
2379 objArrayOop result = oopFactory::new_objArray(ek, length, CHECK_NULL);
2380
2381 oop initial_value = JNIHandles::resolve(initialElement);
2382 if (initial_value != nullptr) { // array already initialized with null
2383 for (int index = 0; index < length; index++) {
2384 result->obj_at_put(index, initial_value);
2385 }
2386 }
2387 ret = (jobjectArray) JNIHandles::make_local(THREAD, result);
2388 return ret;
2389 JNI_END
2390
2391 DT_RETURN_MARK_DECL(GetObjectArrayElement, jobject
2392 , HOTSPOT_JNI_GETOBJECTARRAYELEMENT_RETURN(_ret_ref));
2393
2394 JNI_ENTRY(jobject, jni_GetObjectArrayElement(JNIEnv *env, jobjectArray array, jsize index))
2395 HOTSPOT_JNI_GETOBJECTARRAYELEMENT_ENTRY(env, array, index);
2396 jobject ret = nullptr;
2397 DT_RETURN_MARK(GetObjectArrayElement, jobject, (const jobject&)ret);
2398 objArrayOop a = objArrayOop(JNIHandles::resolve_non_null(array));
2399 if (a->is_within_bounds(index)) {
2400 oop res = a->obj_at(index, CHECK_NULL);
2401 assert(res != nullptr || !a->is_null_free_array(), "Invalid value");
2402 ret = JNIHandles::make_local(THREAD, res);
2403 return ret;
2404 } else {
2405 ResourceMark rm(THREAD);
2406 stringStream ss;
2407 ss.print("Index %d out of bounds for length %d", index, a->length());
2408 THROW_MSG_NULL(vmSymbols::java_lang_ArrayIndexOutOfBoundsException(), ss.as_string());
2409 }
2410 JNI_END
2411
2412 DT_VOID_RETURN_MARK_DECL(SetObjectArrayElement
2413 , HOTSPOT_JNI_SETOBJECTARRAYELEMENT_RETURN());
2414
2415 JNI_ENTRY(void, jni_SetObjectArrayElement(JNIEnv *env, jobjectArray array, jsize index, jobject value))
2416 HOTSPOT_JNI_SETOBJECTARRAYELEMENT_ENTRY(env, array, index, value);
2417 DT_VOID_RETURN_MARK(SetObjectArrayElement);
2418
2419 objArrayOop a = objArrayOop(JNIHandles::resolve_non_null(array));
2420 oop v = JNIHandles::resolve(value);
2421 if (a->is_within_bounds(index)) {
2422 Klass* ek = a->is_flatArray() ? FlatArrayKlass::cast(a->klass())->element_klass() : RefArrayKlass::cast(a->klass())->element_klass();
2423 if (v == nullptr || v->is_a(ek)) {
2424 a->obj_at_put(index, v, CHECK);
2425 } else {
2426 ResourceMark rm(THREAD);
2427 stringStream ss;
2428 Klass *bottom_kl = ObjArrayKlass::cast(a->klass())->bottom_klass();
2429 ss.print("type mismatch: can not store %s to %s[%d]",
2430 v->klass()->external_name(),
2431 bottom_kl->is_typeArray_klass() ? type2name_tab[ArrayKlass::cast(bottom_kl)->element_type()] : bottom_kl->external_name(),
2432 index);
2433 for (int dims = ArrayKlass::cast(a->klass())->dimension(); dims > 1; --dims) {
2434 ss.print("[]");
2435 }
2436 THROW_MSG(vmSymbols::java_lang_ArrayStoreException(), ss.as_string());
2437 }
2438 } else {
2439 ResourceMark rm(THREAD);
2440 stringStream ss;
2441 ss.print("Index %d out of bounds for length %d", index, a->length());
2442 THROW_MSG(vmSymbols::java_lang_ArrayIndexOutOfBoundsException(), ss.as_string());
2443 }
2444 JNI_END
2445
2446
2447
2448 #define DEFINE_NEWSCALARARRAY(Return,Allocator,Result \
2449 ,EntryProbe,ReturnProbe) \
2450 \
2451 DT_RETURN_MARK_DECL(New##Result##Array, Return \
2452 , ReturnProbe); \
2453 \
2454 JNI_ENTRY(Return, \
2455 jni_New##Result##Array(JNIEnv *env, jsize len)) \
2456 EntryProbe; \
2457 Return ret = nullptr;\
2458 DT_RETURN_MARK(New##Result##Array, Return, (const Return&)ret);\
2459 \
2460 oop obj= oopFactory::Allocator(len, CHECK_NULL); \
2461 ret = (Return) JNIHandles::make_local(THREAD, obj); \
2462 return ret;\
2463 JNI_END
2464
2465 DEFINE_NEWSCALARARRAY(jbooleanArray, new_boolArray, Boolean,
2466 HOTSPOT_JNI_NEWBOOLEANARRAY_ENTRY(env, len),
2467 HOTSPOT_JNI_NEWBOOLEANARRAY_RETURN(_ret_ref))
2468 DEFINE_NEWSCALARARRAY(jbyteArray, new_byteArray, Byte,
2469 HOTSPOT_JNI_NEWBYTEARRAY_ENTRY(env, len),
2470 HOTSPOT_JNI_NEWBYTEARRAY_RETURN(_ret_ref))
2471 DEFINE_NEWSCALARARRAY(jshortArray, new_shortArray, Short,
2472 HOTSPOT_JNI_NEWSHORTARRAY_ENTRY(env, len),
2473 HOTSPOT_JNI_NEWSHORTARRAY_RETURN(_ret_ref))
2474 DEFINE_NEWSCALARARRAY(jcharArray, new_charArray, Char,
2475 HOTSPOT_JNI_NEWCHARARRAY_ENTRY(env, len),
2476 HOTSPOT_JNI_NEWCHARARRAY_RETURN(_ret_ref))
2477 DEFINE_NEWSCALARARRAY(jintArray, new_intArray, Int,
2478 HOTSPOT_JNI_NEWINTARRAY_ENTRY(env, len),
2479 HOTSPOT_JNI_NEWINTARRAY_RETURN(_ret_ref))
2480 DEFINE_NEWSCALARARRAY(jlongArray, new_longArray, Long,
2481 HOTSPOT_JNI_NEWLONGARRAY_ENTRY(env, len),
2482 HOTSPOT_JNI_NEWLONGARRAY_RETURN(_ret_ref))
2483 DEFINE_NEWSCALARARRAY(jfloatArray, new_floatArray, Float,
2484 HOTSPOT_JNI_NEWFLOATARRAY_ENTRY(env, len),
2485 HOTSPOT_JNI_NEWFLOATARRAY_RETURN(_ret_ref))
2486 DEFINE_NEWSCALARARRAY(jdoubleArray, new_doubleArray, Double,
2487 HOTSPOT_JNI_NEWDOUBLEARRAY_ENTRY(env, len),
2488 HOTSPOT_JNI_NEWDOUBLEARRAY_RETURN(_ret_ref))
2489
2490 // Return an address which will fault if the caller writes to it.
2491
2492 static char* get_bad_address() {
2493 static char* bad_address = nullptr;
2494 if (bad_address == nullptr) {
2495 size_t size = os::vm_allocation_granularity();
2496 bad_address = os::reserve_memory(size, mtInternal);
2497 if (bad_address != nullptr) {
2498 os::protect_memory(bad_address, size, os::MEM_PROT_READ,
2499 /*is_committed*/false);
2500 }
2501 }
2502 return bad_address;
2503 }
2504
2505
2506
2507 #define DEFINE_GETSCALARARRAYELEMENTS(ElementType,Result \
2508 , EntryProbe, ReturnProbe) \
2509 \
2510 JNI_ENTRY_NO_PRESERVE(ElementType*, \
2511 jni_Get##Result##ArrayElements(JNIEnv *env, ElementType##Array array, jboolean *isCopy)) \
2512 EntryProbe; \
2513 /* allocate an chunk of memory in c land */ \
2514 typeArrayOop a = typeArrayOop(JNIHandles::resolve_non_null(array)); \
2515 ElementType* result; \
2516 int len = a->length(); \
2517 if (len == 0) { \
2518 if (isCopy != nullptr) { \
2519 *isCopy = JNI_FALSE; \
2520 } \
2521 /* Empty array: legal but useless, can't return null. \
2522 * Return a pointer to something useless. \
2523 * Avoid asserts in typeArrayOop. */ \
2524 result = (ElementType*)get_bad_address(); \
2525 } else { \
2526 /* JNI Specification states return null on OOM */ \
2527 result = NEW_C_HEAP_ARRAY_RETURN_NULL(ElementType, len, mtInternal); \
2528 if (result != nullptr) { \
2529 /* copy the array to the c chunk */ \
2530 ArrayAccess<>::arraycopy_to_native(a, typeArrayOopDesc::element_offset<ElementType>(0), \
2531 result, len); \
2532 if (isCopy) { \
2533 *isCopy = JNI_TRUE; \
2534 } \
2535 } \
2536 } \
2537 ReturnProbe; \
2538 return result; \
2539 JNI_END
2540
2541 DEFINE_GETSCALARARRAYELEMENTS(jboolean, Boolean
2542 , HOTSPOT_JNI_GETBOOLEANARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy),
2543 HOTSPOT_JNI_GETBOOLEANARRAYELEMENTS_RETURN((uintptr_t*)result))
2544 DEFINE_GETSCALARARRAYELEMENTS(jbyte, Byte
2545 , HOTSPOT_JNI_GETBYTEARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy),
2546 HOTSPOT_JNI_GETBYTEARRAYELEMENTS_RETURN((char*)result))
2547 DEFINE_GETSCALARARRAYELEMENTS(jshort, Short
2548 , HOTSPOT_JNI_GETSHORTARRAYELEMENTS_ENTRY(env, (uint16_t*) array, (uintptr_t *) isCopy),
2549 HOTSPOT_JNI_GETSHORTARRAYELEMENTS_RETURN((uint16_t*)result))
2550 DEFINE_GETSCALARARRAYELEMENTS(jchar, Char
2551 , HOTSPOT_JNI_GETCHARARRAYELEMENTS_ENTRY(env, (uint16_t*) array, (uintptr_t *) isCopy),
2552 HOTSPOT_JNI_GETCHARARRAYELEMENTS_RETURN(result))
2553 DEFINE_GETSCALARARRAYELEMENTS(jint, Int
2554 , HOTSPOT_JNI_GETINTARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy),
2555 HOTSPOT_JNI_GETINTARRAYELEMENTS_RETURN((uint32_t*)result))
2556 DEFINE_GETSCALARARRAYELEMENTS(jlong, Long
2557 , HOTSPOT_JNI_GETLONGARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy),
2558 HOTSPOT_JNI_GETLONGARRAYELEMENTS_RETURN(((uintptr_t*)result)))
2559 // Float and double probes don't return value because dtrace doesn't currently support it
2560 DEFINE_GETSCALARARRAYELEMENTS(jfloat, Float
2561 , HOTSPOT_JNI_GETFLOATARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy),
2562 HOTSPOT_JNI_GETFLOATARRAYELEMENTS_RETURN(result))
2563 DEFINE_GETSCALARARRAYELEMENTS(jdouble, Double
2564 , HOTSPOT_JNI_GETDOUBLEARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy),
2565 HOTSPOT_JNI_GETDOUBLEARRAYELEMENTS_RETURN(result))
2566
2567
2568 #define DEFINE_RELEASESCALARARRAYELEMENTS(ElementType,Result \
2569 , EntryProbe, ReturnProbe) \
2570 \
2571 JNI_ENTRY_NO_PRESERVE(void, \
2572 jni_Release##Result##ArrayElements(JNIEnv *env, ElementType##Array array, \
2573 ElementType *buf, jint mode)) \
2574 EntryProbe; \
2575 typeArrayOop a = typeArrayOop(JNIHandles::resolve_non_null(array)); \
2576 int len = a->length(); \
2577 if (len != 0) { /* Empty array: nothing to free or copy. */ \
2578 if ((mode == 0) || (mode == JNI_COMMIT)) { \
2579 ArrayAccess<>::arraycopy_from_native(buf, a, typeArrayOopDesc::element_offset<ElementType>(0), len); \
2580 } \
2581 if ((mode == 0) || (mode == JNI_ABORT)) { \
2582 FreeHeap(buf); \
2583 } \
2584 } \
2585 ReturnProbe; \
2586 JNI_END
2587
2588 DEFINE_RELEASESCALARARRAYELEMENTS(jboolean, Boolean
2589 , HOTSPOT_JNI_RELEASEBOOLEANARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) buf, mode),
2590 HOTSPOT_JNI_RELEASEBOOLEANARRAYELEMENTS_RETURN())
2591 DEFINE_RELEASESCALARARRAYELEMENTS(jbyte, Byte
2592 , HOTSPOT_JNI_RELEASEBYTEARRAYELEMENTS_ENTRY(env, array, (char *) buf, mode),
2593 HOTSPOT_JNI_RELEASEBYTEARRAYELEMENTS_RETURN())
2594 DEFINE_RELEASESCALARARRAYELEMENTS(jshort, Short
2595 , HOTSPOT_JNI_RELEASESHORTARRAYELEMENTS_ENTRY(env, array, (uint16_t *) buf, mode),
2596 HOTSPOT_JNI_RELEASESHORTARRAYELEMENTS_RETURN())
2597 DEFINE_RELEASESCALARARRAYELEMENTS(jchar, Char
2598 , HOTSPOT_JNI_RELEASECHARARRAYELEMENTS_ENTRY(env, array, (uint16_t *) buf, mode),
2599 HOTSPOT_JNI_RELEASECHARARRAYELEMENTS_RETURN())
2600 DEFINE_RELEASESCALARARRAYELEMENTS(jint, Int
2601 , HOTSPOT_JNI_RELEASEINTARRAYELEMENTS_ENTRY(env, array, (uint32_t *) buf, mode),
2602 HOTSPOT_JNI_RELEASEINTARRAYELEMENTS_RETURN())
2603 DEFINE_RELEASESCALARARRAYELEMENTS(jlong, Long
2604 , HOTSPOT_JNI_RELEASELONGARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) buf, mode),
2605 HOTSPOT_JNI_RELEASELONGARRAYELEMENTS_RETURN())
2606 DEFINE_RELEASESCALARARRAYELEMENTS(jfloat, Float
2607 , HOTSPOT_JNI_RELEASEFLOATARRAYELEMENTS_ENTRY(env, array, (float *) buf, mode),
2608 HOTSPOT_JNI_RELEASEFLOATARRAYELEMENTS_RETURN())
2609 DEFINE_RELEASESCALARARRAYELEMENTS(jdouble, Double
2610 , HOTSPOT_JNI_RELEASEDOUBLEARRAYELEMENTS_ENTRY(env, array, (double *) buf, mode),
2611 HOTSPOT_JNI_RELEASEDOUBLEARRAYELEMENTS_RETURN())
2612
2613 static void check_bounds(jsize start, jsize copy_len, jsize array_len, TRAPS) {
2614 ResourceMark rm(THREAD);
2615 if (copy_len < 0) {
2616 stringStream ss;
2617 ss.print("Length %d is negative", copy_len);
2618 THROW_MSG(vmSymbols::java_lang_ArrayIndexOutOfBoundsException(), ss.as_string());
2619 } else if (start < 0 || (start > array_len - copy_len)) {
2620 stringStream ss;
2621 ss.print("Array region %d.." INT64_FORMAT " out of bounds for length %d",
2622 start, (int64_t)start+(int64_t)copy_len, array_len);
2623 THROW_MSG(vmSymbols::java_lang_ArrayIndexOutOfBoundsException(), ss.as_string());
2624 }
2625 }
2626
2627 #define DEFINE_GETSCALARARRAYREGION(ElementType,Result \
2628 , EntryProbe, ReturnProbe) \
2629 DT_VOID_RETURN_MARK_DECL(Get##Result##ArrayRegion \
2630 , ReturnProbe); \
2631 \
2632 JNI_ENTRY(void, \
2633 jni_Get##Result##ArrayRegion(JNIEnv *env, ElementType##Array array, jsize start, \
2634 jsize len, ElementType *buf)) \
2635 EntryProbe; \
2636 DT_VOID_RETURN_MARK(Get##Result##ArrayRegion); \
2637 typeArrayOop src = typeArrayOop(JNIHandles::resolve_non_null(array)); \
2638 check_bounds(start, len, src->length(), CHECK); \
2639 if (len > 0) { \
2640 ArrayAccess<>::arraycopy_to_native(src, typeArrayOopDesc::element_offset<ElementType>(start), buf, len); \
2641 } \
2642 JNI_END
2643
2644 DEFINE_GETSCALARARRAYREGION(jboolean,Boolean
2645 , HOTSPOT_JNI_GETBOOLEANARRAYREGION_ENTRY(env, array, start, len, (uintptr_t *) buf),
2646 HOTSPOT_JNI_GETBOOLEANARRAYREGION_RETURN());
2647 DEFINE_GETSCALARARRAYREGION(jbyte, Byte
2648 , HOTSPOT_JNI_GETBYTEARRAYREGION_ENTRY(env, array, start, len, (char *) buf),
2649 HOTSPOT_JNI_GETBYTEARRAYREGION_RETURN());
2650 DEFINE_GETSCALARARRAYREGION(jshort, Short
2651 , HOTSPOT_JNI_GETSHORTARRAYREGION_ENTRY(env, array, start, len, (uint16_t *) buf),
2652 HOTSPOT_JNI_GETSHORTARRAYREGION_RETURN());
2653 DEFINE_GETSCALARARRAYREGION(jchar, Char
2654 , HOTSPOT_JNI_GETCHARARRAYREGION_ENTRY(env, array, start, len, (uint16_t*) buf),
2655 HOTSPOT_JNI_GETCHARARRAYREGION_RETURN());
2656 DEFINE_GETSCALARARRAYREGION(jint, Int
2657 , HOTSPOT_JNI_GETINTARRAYREGION_ENTRY(env, array, start, len, (uint32_t*) buf),
2658 HOTSPOT_JNI_GETINTARRAYREGION_RETURN());
2659 DEFINE_GETSCALARARRAYREGION(jlong, Long
2660 , HOTSPOT_JNI_GETLONGARRAYREGION_ENTRY(env, array, start, len, (uintptr_t *) buf),
2661 HOTSPOT_JNI_GETLONGARRAYREGION_RETURN());
2662 DEFINE_GETSCALARARRAYREGION(jfloat, Float
2663 , HOTSPOT_JNI_GETFLOATARRAYREGION_ENTRY(env, array, start, len, (float *) buf),
2664 HOTSPOT_JNI_GETFLOATARRAYREGION_RETURN());
2665 DEFINE_GETSCALARARRAYREGION(jdouble, Double
2666 , HOTSPOT_JNI_GETDOUBLEARRAYREGION_ENTRY(env, array, start, len, (double *) buf),
2667 HOTSPOT_JNI_GETDOUBLEARRAYREGION_RETURN());
2668
2669
2670 #define DEFINE_SETSCALARARRAYREGION(ElementType,Result \
2671 , EntryProbe, ReturnProbe) \
2672 DT_VOID_RETURN_MARK_DECL(Set##Result##ArrayRegion \
2673 ,ReturnProbe); \
2674 \
2675 JNI_ENTRY(void, \
2676 jni_Set##Result##ArrayRegion(JNIEnv *env, ElementType##Array array, jsize start, \
2677 jsize len, const ElementType *buf)) \
2678 EntryProbe; \
2679 DT_VOID_RETURN_MARK(Set##Result##ArrayRegion); \
2680 typeArrayOop dst = typeArrayOop(JNIHandles::resolve_non_null(array)); \
2681 check_bounds(start, len, dst->length(), CHECK); \
2682 if (len > 0) { \
2683 ArrayAccess<>::arraycopy_from_native(buf, dst, typeArrayOopDesc::element_offset<ElementType>(start), len); \
2684 } \
2685 JNI_END
2686
2687 DEFINE_SETSCALARARRAYREGION(jboolean, Boolean
2688 , HOTSPOT_JNI_SETBOOLEANARRAYREGION_ENTRY(env, array, start, len, (uintptr_t *)buf),
2689 HOTSPOT_JNI_SETBOOLEANARRAYREGION_RETURN())
2690 DEFINE_SETSCALARARRAYREGION(jbyte, Byte
2691 , HOTSPOT_JNI_SETBYTEARRAYREGION_ENTRY(env, array, start, len, (char *) buf),
2692 HOTSPOT_JNI_SETBYTEARRAYREGION_RETURN())
2693 DEFINE_SETSCALARARRAYREGION(jshort, Short
2694 , HOTSPOT_JNI_SETSHORTARRAYREGION_ENTRY(env, array, start, len, (uint16_t *) buf),
2695 HOTSPOT_JNI_SETSHORTARRAYREGION_RETURN())
2696 DEFINE_SETSCALARARRAYREGION(jchar, Char
2697 , HOTSPOT_JNI_SETCHARARRAYREGION_ENTRY(env, array, start, len, (uint16_t *) buf),
2698 HOTSPOT_JNI_SETCHARARRAYREGION_RETURN())
2699 DEFINE_SETSCALARARRAYREGION(jint, Int
2700 , HOTSPOT_JNI_SETINTARRAYREGION_ENTRY(env, array, start, len, (uint32_t *) buf),
2701 HOTSPOT_JNI_SETINTARRAYREGION_RETURN())
2702 DEFINE_SETSCALARARRAYREGION(jlong, Long
2703 , HOTSPOT_JNI_SETLONGARRAYREGION_ENTRY(env, array, start, len, (uintptr_t *) buf),
2704 HOTSPOT_JNI_SETLONGARRAYREGION_RETURN())
2705 DEFINE_SETSCALARARRAYREGION(jfloat, Float
2706 , HOTSPOT_JNI_SETFLOATARRAYREGION_ENTRY(env, array, start, len, (float *) buf),
2707 HOTSPOT_JNI_SETFLOATARRAYREGION_RETURN())
2708 DEFINE_SETSCALARARRAYREGION(jdouble, Double
2709 , HOTSPOT_JNI_SETDOUBLEARRAYREGION_ENTRY(env, array, start, len, (double *) buf),
2710 HOTSPOT_JNI_SETDOUBLEARRAYREGION_RETURN())
2711
2712
2713 DT_RETURN_MARK_DECL(RegisterNatives, jint
2714 , HOTSPOT_JNI_REGISTERNATIVES_RETURN(_ret_ref));
2715
2716 JNI_ENTRY(jint, jni_RegisterNatives(JNIEnv *env, jclass clazz,
2717 const JNINativeMethod *methods,
2718 jint nMethods))
2719 HOTSPOT_JNI_REGISTERNATIVES_ENTRY(env, clazz, (void *) methods, nMethods);
2720 jint ret = 0;
2721 DT_RETURN_MARK(RegisterNatives, jint, (const jint&)ret);
2722
2723 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz));
2724
2725 // There are no restrictions on native code registering native methods,
2726 // which allows agents to redefine the bindings to native methods, however
2727 // we issue a warning if any code running outside of the boot/platform
2728 // loader is rebinding any native methods in classes loaded by the
2729 // boot/platform loader that are in named modules. That will catch changes
2730 // to platform classes while excluding classes added to the bootclasspath.
2731 bool do_warning = false;
2732
2733 // Only instanceKlasses can have native methods
2734 if (k->is_instance_klass()) {
2735 oop cl = k->class_loader();
2736 InstanceKlass* ik = InstanceKlass::cast(k);
2737 // Check for a platform class
2738 if ((cl == nullptr || SystemDictionary::is_platform_class_loader(cl)) &&
2739 ik->module()->is_named()) {
2740 Klass* caller = thread->security_get_caller_class(1);
2741 // If no caller class, or caller class has a different loader, then
2742 // issue a warning below.
2743 do_warning = (caller == nullptr) || caller->class_loader() != cl;
2744 }
2745 }
2746
2747
2748 for (int index = 0; index < nMethods; index++) {
2749 const char* meth_name = methods[index].name;
2750 const char* meth_sig = methods[index].signature;
2751 int meth_name_len = (int)strlen(meth_name);
2752
2753 // The class should have been loaded (we have an instance of the class
2754 // passed in) so the method and signature should already be in the symbol
2755 // table. If they're not there, the method doesn't exist.
2756 TempNewSymbol name = SymbolTable::probe(meth_name, meth_name_len);
2757 TempNewSymbol signature = SymbolTable::probe(meth_sig, (int)strlen(meth_sig));
2758
2759 if (name == nullptr || signature == nullptr) {
2760 ResourceMark rm(THREAD);
2761 stringStream st;
2762 st.print("Method %s.%s%s not found", k->external_name(), meth_name, meth_sig);
2763 // Must return negative value on failure
2764 THROW_MSG_(vmSymbols::java_lang_NoSuchMethodError(), st.as_string(), -1);
2765 }
2766
2767 if (do_warning) {
2768 ResourceMark rm(THREAD);
2769 log_warning(jni, resolve)("Re-registering of platform native method: %s.%s%s "
2770 "from code in a different classloader", k->external_name(), meth_name, meth_sig);
2771 }
2772
2773 bool res = Method::register_native(k, name, signature,
2774 (address) methods[index].fnPtr, THREAD);
2775 if (!res) {
2776 ret = -1;
2777 break;
2778 }
2779 }
2780 return ret;
2781 JNI_END
2782
2783
2784 JNI_ENTRY(jint, jni_UnregisterNatives(JNIEnv *env, jclass clazz))
2785 HOTSPOT_JNI_UNREGISTERNATIVES_ENTRY(env, clazz);
2786 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz));
2787 //%note jni_2
2788 if (k->is_instance_klass()) {
2789 for (int index = 0; index < InstanceKlass::cast(k)->methods()->length(); index++) {
2790 Method* m = InstanceKlass::cast(k)->methods()->at(index);
2791 if (m->is_native()) {
2792 m->clear_native_function();
2793 m->set_signature_handler(nullptr);
2794 }
2795 }
2796 }
2797 HOTSPOT_JNI_UNREGISTERNATIVES_RETURN(0);
2798 return 0;
2799 JNI_END
2800
2801 //
2802 // Monitor functions
2803 //
2804
2805 DT_RETURN_MARK_DECL(MonitorEnter, jint
2806 , HOTSPOT_JNI_MONITORENTER_RETURN(_ret_ref));
2807
2808 JNI_ENTRY(jint, jni_MonitorEnter(JNIEnv *env, jobject jobj))
2809 HOTSPOT_JNI_MONITORENTER_ENTRY(env, jobj);
2810 jint ret = JNI_ERR;
2811 DT_RETURN_MARK(MonitorEnter, jint, (const jint&)ret);
2812
2813 // If the object is null, we can't do anything with it
2814 if (jobj == nullptr) {
2815 THROW_(vmSymbols::java_lang_NullPointerException(), JNI_ERR);
2816 }
2817
2818 Handle obj(thread, JNIHandles::resolve_non_null(jobj));
2819 ObjectSynchronizer::jni_enter(obj, CHECK_(JNI_ERR));
2820 return JNI_OK;
2821 JNI_END
2822
2823 DT_RETURN_MARK_DECL(MonitorExit, jint
2824 , HOTSPOT_JNI_MONITOREXIT_RETURN(_ret_ref));
2825
2826 JNI_ENTRY(jint, jni_MonitorExit(JNIEnv *env, jobject jobj))
2827 HOTSPOT_JNI_MONITOREXIT_ENTRY(env, jobj);
2828 jint ret = JNI_ERR;
2829 DT_RETURN_MARK(MonitorExit, jint, (const jint&)ret);
2830
2831 // Don't do anything with a null object
2832 if (jobj == nullptr) {
2833 THROW_(vmSymbols::java_lang_NullPointerException(), JNI_ERR);
2834 }
2835
2836 Handle obj(THREAD, JNIHandles::resolve_non_null(jobj));
2837 ObjectSynchronizer::jni_exit(obj(), CHECK_(JNI_ERR));
2838 return JNI_OK;
2839 JNI_END
2840
2841 //
2842 // Extensions
2843 //
2844
2845 DT_VOID_RETURN_MARK_DECL(GetStringRegion
2846 , HOTSPOT_JNI_GETSTRINGREGION_RETURN());
2847
2848 JNI_ENTRY(void, jni_GetStringRegion(JNIEnv *env, jstring string, jsize start, jsize len, jchar *buf))
2849 HOTSPOT_JNI_GETSTRINGREGION_ENTRY(env, string, start, len, buf);
2850 DT_VOID_RETURN_MARK(GetStringRegion);
2851 oop s = JNIHandles::resolve_non_null(string);
2852 typeArrayOop s_value = java_lang_String::value(s);
2853 int s_len = java_lang_String::length(s, s_value);
2854 if (start < 0 || len < 0 || start > s_len - len) {
2855 THROW(vmSymbols::java_lang_StringIndexOutOfBoundsException());
2856 } else {
2857 if (len > 0) {
2858 bool is_latin1 = java_lang_String::is_latin1(s);
2859 if (!is_latin1) {
2860 ArrayAccess<>::arraycopy_to_native(s_value, typeArrayOopDesc::element_offset<jchar>(start),
2861 buf, len);
2862 } else {
2863 for (int i = 0; i < len; i++) {
2864 buf[i] = ((jchar) s_value->byte_at(i + start)) & 0xff;
2865 }
2866 }
2867 }
2868 }
2869 JNI_END
2870
2871 DT_VOID_RETURN_MARK_DECL(GetStringUTFRegion
2872 , HOTSPOT_JNI_GETSTRINGUTFREGION_RETURN());
2873
2874 JNI_ENTRY(void, jni_GetStringUTFRegion(JNIEnv *env, jstring string, jsize start, jsize len, char *buf))
2875 HOTSPOT_JNI_GETSTRINGUTFREGION_ENTRY(env, string, start, len, buf);
2876 DT_VOID_RETURN_MARK(GetStringUTFRegion);
2877 oop s = JNIHandles::resolve_non_null(string);
2878 typeArrayOop s_value = java_lang_String::value(s);
2879 int s_len = java_lang_String::length(s, s_value);
2880 if (start < 0 || len < 0 || start > s_len - len) {
2881 THROW(vmSymbols::java_lang_StringIndexOutOfBoundsException());
2882 } else {
2883 //%note jni_7
2884 if (len > 0) {
2885 // Assume the buffer is large enough as the JNI spec. does not require user error checking
2886 java_lang_String::as_utf8_string(s, s_value, start, len, buf, INT_MAX);
2887 // as_utf8_string null-terminates the result string
2888 } else {
2889 // JDK null-terminates the buffer even in len is zero
2890 if (buf != nullptr) {
2891 buf[0] = 0;
2892 }
2893 }
2894 }
2895 JNI_END
2896
2897 JNI_ENTRY(void*, jni_GetPrimitiveArrayCritical(JNIEnv *env, jarray array, jboolean *isCopy))
2898 HOTSPOT_JNI_GETPRIMITIVEARRAYCRITICAL_ENTRY(env, array, (uintptr_t *) isCopy);
2899 Handle a(thread, JNIHandles::resolve_non_null(array));
2900 assert(a->is_typeArray(), "just checking");
2901
2902 // Pin object
2903 Universe::heap()->pin_object(thread, a());
2904
2905 BasicType type = TypeArrayKlass::cast(a->klass())->element_type();
2906 void* ret = arrayOop(a())->base(type);
2907 if (isCopy != nullptr) {
2908 *isCopy = JNI_FALSE;
2909 }
2910 HOTSPOT_JNI_GETPRIMITIVEARRAYCRITICAL_RETURN(ret);
2911 return ret;
2912 JNI_END
2913
2914
2915 JNI_ENTRY(void, jni_ReleasePrimitiveArrayCritical(JNIEnv *env, jarray array, void *carray, jint mode))
2916 HOTSPOT_JNI_RELEASEPRIMITIVEARRAYCRITICAL_ENTRY(env, array, carray, mode);
2917 // Unpin object
2918 Universe::heap()->unpin_object(thread, JNIHandles::resolve_non_null(array));
2919 HOTSPOT_JNI_RELEASEPRIMITIVEARRAYCRITICAL_RETURN();
2920 JNI_END
2921
2922
2923 JNI_ENTRY(const jchar*, jni_GetStringCritical(JNIEnv *env, jstring string, jboolean *isCopy))
2924 HOTSPOT_JNI_GETSTRINGCRITICAL_ENTRY(env, string, (uintptr_t *) isCopy);
2925 oop s = JNIHandles::resolve_non_null(string);
2926 jchar* ret;
2927 if (!java_lang_String::is_latin1(s)) {
2928 typeArrayHandle s_value(thread, java_lang_String::value(s));
2929
2930 // Pin value array
2931 Universe::heap()->pin_object(thread, s_value());
2932
2933 ret = (jchar*) s_value->base(T_CHAR);
2934 if (isCopy != nullptr) *isCopy = JNI_FALSE;
2935 } else {
2936 // Inflate latin1 encoded string to UTF16
2937 typeArrayOop s_value = java_lang_String::value(s);
2938 int s_len = java_lang_String::length(s, s_value);
2939 ret = NEW_C_HEAP_ARRAY_RETURN_NULL(jchar, s_len + 1, mtInternal); // add one for zero termination
2940 /* JNI Specification states return null on OOM */
2941 if (ret != nullptr) {
2942 for (int i = 0; i < s_len; i++) {
2943 ret[i] = ((jchar) s_value->byte_at(i)) & 0xff;
2944 }
2945 ret[s_len] = 0;
2946 }
2947 if (isCopy != nullptr) *isCopy = JNI_TRUE;
2948 }
2949 HOTSPOT_JNI_GETSTRINGCRITICAL_RETURN((uint16_t *) ret);
2950 return ret;
2951 JNI_END
2952
2953
2954 JNI_ENTRY(void, jni_ReleaseStringCritical(JNIEnv *env, jstring str, const jchar *chars))
2955 HOTSPOT_JNI_RELEASESTRINGCRITICAL_ENTRY(env, str, (uint16_t *) chars);
2956 oop s = JNIHandles::resolve_non_null(str);
2957 bool is_latin1 = java_lang_String::is_latin1(s);
2958
2959 if (is_latin1) {
2960 // For latin1 string, free jchar array allocated by earlier call to GetStringCritical.
2961 // This assumes that ReleaseStringCritical bookends GetStringCritical.
2962 FREE_C_HEAP_ARRAY(jchar, chars);
2963 } else {
2964 // StringDedup can have replaced the value array, so don't fetch the array from 's'.
2965 // Instead, we calculate the address based on the jchar array exposed with GetStringCritical.
2966 oop value = cast_to_oop((address)chars - arrayOopDesc::base_offset_in_bytes(T_CHAR));
2967
2968 // Unpin value array
2969 Universe::heap()->unpin_object(thread, value);
2970 }
2971 HOTSPOT_JNI_RELEASESTRINGCRITICAL_RETURN();
2972 JNI_END
2973
2974
2975 JNI_ENTRY(jweak, jni_NewWeakGlobalRef(JNIEnv *env, jobject ref))
2976 HOTSPOT_JNI_NEWWEAKGLOBALREF_ENTRY(env, ref);
2977 Handle ref_handle(thread, JNIHandles::resolve(ref));
2978 jweak ret = JNIHandles::make_weak_global(ref_handle, AllocFailStrategy::RETURN_NULL);
2979 if (ret == nullptr && ref_handle.not_null()) {
2980 THROW_OOP_(Universe::out_of_memory_error_c_heap(), nullptr);
2981 }
2982 HOTSPOT_JNI_NEWWEAKGLOBALREF_RETURN(ret);
2983 return ret;
2984 JNI_END
2985
2986 // Must be JNI_ENTRY (with HandleMark)
2987 JNI_ENTRY(void, jni_DeleteWeakGlobalRef(JNIEnv *env, jweak ref))
2988 HOTSPOT_JNI_DELETEWEAKGLOBALREF_ENTRY(env, ref);
2989 JNIHandles::destroy_weak_global(ref);
2990 HOTSPOT_JNI_DELETEWEAKGLOBALREF_RETURN();
2991 JNI_END
2992
2993
2994 JNI_ENTRY_NO_PRESERVE(jboolean, jni_ExceptionCheck(JNIEnv *env))
2995 HOTSPOT_JNI_EXCEPTIONCHECK_ENTRY(env);
2996 jni_check_async_exceptions(thread);
2997 jboolean ret = (thread->has_pending_exception()) ? JNI_TRUE : JNI_FALSE;
2998 HOTSPOT_JNI_EXCEPTIONCHECK_RETURN(ret);
2999 return ret;
3000 JNI_END
3001
3002
3003 // Initialization state for three routines below relating to
3004 // java.nio.DirectBuffers
3005 static int directBufferSupportInitializeStarted = 0;
3006 static volatile int directBufferSupportInitializeEnded = 0;
3007 static volatile int directBufferSupportInitializeFailed = 0;
3008 static jclass bufferClass = nullptr;
3009 static jclass directBufferClass = nullptr;
3010 static jclass directByteBufferClass = nullptr;
3011 static jmethodID directByteBufferConstructor = nullptr;
3012 static jfieldID directBufferAddressField = nullptr;
3013 static jfieldID bufferCapacityField = nullptr;
3014
3015 static jclass lookupOne(JNIEnv* env, const char* name, TRAPS) {
3016 Handle loader; // null (bootstrap) loader
3017
3018 TempNewSymbol sym = SymbolTable::new_symbol(name);
3019 jclass result = find_class_from_class_loader(env, sym, true, loader, true, CHECK_NULL);
3020
3021 if (log_is_enabled(Debug, class, resolve) && result != nullptr) {
3022 trace_class_resolution(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(result)));
3023 }
3024 return result;
3025 }
3026
3027 // These lookups are done with the null (bootstrap) ClassLoader to
3028 // circumvent any security checks that would be done by jni_FindClass.
3029 JNI_ENTRY(bool, lookupDirectBufferClasses(JNIEnv* env))
3030 {
3031 if ((bufferClass = lookupOne(env, "java/nio/Buffer", thread)) == nullptr) { return false; }
3032 if ((directBufferClass = lookupOne(env, "sun/nio/ch/DirectBuffer", thread)) == nullptr) { return false; }
3033 if ((directByteBufferClass = lookupOne(env, "java/nio/DirectByteBuffer", thread)) == nullptr) { return false; }
3034 return true;
3035 }
3036 JNI_END
3037
3038
3039 static bool initializeDirectBufferSupport(JNIEnv* env, JavaThread* thread) {
3040 if (directBufferSupportInitializeFailed) {
3041 return false;
3042 }
3043
3044 if (AtomicAccess::cmpxchg(&directBufferSupportInitializeStarted, 0, 1) == 0) {
3045 if (!lookupDirectBufferClasses(env)) {
3046 directBufferSupportInitializeFailed = 1;
3047 return false;
3048 }
3049
3050 // Make global references for these
3051 bufferClass = (jclass) env->NewGlobalRef(bufferClass);
3052 directBufferClass = (jclass) env->NewGlobalRef(directBufferClass);
3053 directByteBufferClass = (jclass) env->NewGlobalRef(directByteBufferClass);
3054
3055 // Global refs will be null if out-of-memory (no exception is pending)
3056 if (bufferClass == nullptr || directBufferClass == nullptr || directByteBufferClass == nullptr) {
3057 directBufferSupportInitializeFailed = 1;
3058 return false;
3059 }
3060
3061 // Get needed field and method IDs
3062 directByteBufferConstructor = env->GetMethodID(directByteBufferClass, "<init>", "(JJ)V");
3063 if (env->ExceptionCheck()) {
3064 env->ExceptionClear();
3065 directBufferSupportInitializeFailed = 1;
3066 return false;
3067 }
3068 directBufferAddressField = env->GetFieldID(bufferClass, "address", "J");
3069 if (env->ExceptionCheck()) {
3070 env->ExceptionClear();
3071 directBufferSupportInitializeFailed = 1;
3072 return false;
3073 }
3074 bufferCapacityField = env->GetFieldID(bufferClass, "capacity", "I");
3075 if (env->ExceptionCheck()) {
3076 env->ExceptionClear();
3077 directBufferSupportInitializeFailed = 1;
3078 return false;
3079 }
3080
3081 if ((directByteBufferConstructor == nullptr) ||
3082 (directBufferAddressField == nullptr) ||
3083 (bufferCapacityField == nullptr)) {
3084 directBufferSupportInitializeFailed = 1;
3085 return false;
3086 }
3087
3088 directBufferSupportInitializeEnded = 1;
3089 } else {
3090 while (!directBufferSupportInitializeEnded && !directBufferSupportInitializeFailed) {
3091 os::naked_yield();
3092 }
3093 }
3094
3095 return !directBufferSupportInitializeFailed;
3096 }
3097
3098 extern "C" jobject JNICALL jni_NewDirectByteBuffer(JNIEnv *env, void* address, jlong capacity)
3099 {
3100 // thread_from_jni_environment() will block if VM is gone.
3101 JavaThread* thread = JavaThread::thread_from_jni_environment(env);
3102
3103 HOTSPOT_JNI_NEWDIRECTBYTEBUFFER_ENTRY(env, address, capacity);
3104
3105 if (!directBufferSupportInitializeEnded) {
3106 if (!initializeDirectBufferSupport(env, thread)) {
3107 HOTSPOT_JNI_NEWDIRECTBYTEBUFFER_RETURN(nullptr);
3108 return nullptr;
3109 }
3110 }
3111
3112 // Being paranoid about accidental sign extension on address
3113 jlong addr = (jlong) ((uintptr_t) address);
3114 jobject ret = env->NewObject(directByteBufferClass, directByteBufferConstructor, addr, capacity);
3115 HOTSPOT_JNI_NEWDIRECTBYTEBUFFER_RETURN(ret);
3116 return ret;
3117 }
3118
3119 DT_RETURN_MARK_DECL(GetDirectBufferAddress, void*
3120 , HOTSPOT_JNI_GETDIRECTBUFFERADDRESS_RETURN((void*) _ret_ref));
3121
3122 extern "C" void* JNICALL jni_GetDirectBufferAddress(JNIEnv *env, jobject buf)
3123 {
3124 // thread_from_jni_environment() will block if VM is gone.
3125 JavaThread* thread = JavaThread::thread_from_jni_environment(env);
3126
3127 HOTSPOT_JNI_GETDIRECTBUFFERADDRESS_ENTRY(env, buf);
3128 void* ret = nullptr;
3129 DT_RETURN_MARK(GetDirectBufferAddress, void*, (const void*&)ret);
3130
3131 if (!directBufferSupportInitializeEnded) {
3132 if (!initializeDirectBufferSupport(env, thread)) {
3133 return nullptr;
3134 }
3135 }
3136
3137 if ((buf != nullptr) && (!env->IsInstanceOf(buf, directBufferClass))) {
3138 return nullptr;
3139 }
3140
3141 ret = (void*)(intptr_t)env->GetLongField(buf, directBufferAddressField);
3142 return ret;
3143 }
3144
3145 DT_RETURN_MARK_DECL(GetDirectBufferCapacity, jlong
3146 , HOTSPOT_JNI_GETDIRECTBUFFERCAPACITY_RETURN(_ret_ref));
3147
3148 extern "C" jlong JNICALL jni_GetDirectBufferCapacity(JNIEnv *env, jobject buf)
3149 {
3150 // thread_from_jni_environment() will block if VM is gone.
3151 JavaThread* thread = JavaThread::thread_from_jni_environment(env);
3152
3153 HOTSPOT_JNI_GETDIRECTBUFFERCAPACITY_ENTRY(env, buf);
3154 jlong ret = -1;
3155 DT_RETURN_MARK(GetDirectBufferCapacity, jlong, (const jlong&)ret);
3156
3157 if (!directBufferSupportInitializeEnded) {
3158 if (!initializeDirectBufferSupport(env, thread)) {
3159 ret = 0;
3160 return ret;
3161 }
3162 }
3163
3164 if (buf == nullptr) {
3165 return -1;
3166 }
3167
3168 if (!env->IsInstanceOf(buf, directBufferClass)) {
3169 return -1;
3170 }
3171
3172 // NOTE that capacity is currently an int in the implementation
3173 ret = env->GetIntField(buf, bufferCapacityField);
3174 return ret;
3175 }
3176
3177
3178 JNI_LEAF(jint, jni_GetVersion(JNIEnv *env))
3179 HOTSPOT_JNI_GETVERSION_ENTRY(env);
3180 HOTSPOT_JNI_GETVERSION_RETURN(CurrentVersion);
3181 return CurrentVersion;
3182 JNI_END
3183
3184 extern struct JavaVM_ main_vm;
3185
3186 JNI_LEAF(jint, jni_GetJavaVM(JNIEnv *env, JavaVM **vm))
3187 HOTSPOT_JNI_GETJAVAVM_ENTRY(env, (void **) vm);
3188 *vm = (JavaVM *)(&main_vm);
3189 HOTSPOT_JNI_GETJAVAVM_RETURN(JNI_OK);
3190 return JNI_OK;
3191 JNI_END
3192
3193
3194 JNI_ENTRY(jobject, jni_GetModule(JNIEnv* env, jclass clazz))
3195 return Modules::get_module(clazz, THREAD);
3196 JNI_END
3197
3198 JNI_ENTRY(jboolean, jni_IsVirtualThread(JNIEnv* env, jobject obj))
3199 oop thread_obj = JNIHandles::resolve_external_guard(obj);
3200 if (thread_obj != nullptr && thread_obj->is_a(vmClasses::BaseVirtualThread_klass())) {
3201 return JNI_TRUE;
3202 } else {
3203 return JNI_FALSE;
3204 }
3205 JNI_END
3206
3207
3208 // Structure containing all jni functions
3209 struct JNINativeInterface_ jni_NativeInterface = {
3210 nullptr,
3211 nullptr,
3212 nullptr,
3213
3214 nullptr,
3215
3216 jni_GetVersion,
3217
3218 jni_DefineClass,
3219 jni_FindClass,
3220
3221 jni_FromReflectedMethod,
3222 jni_FromReflectedField,
3223
3224 jni_ToReflectedMethod,
3225
3226 jni_GetSuperclass,
3227 jni_IsAssignableFrom,
3228
3229 jni_ToReflectedField,
3230
3231 jni_Throw,
3232 jni_ThrowNew,
3233 jni_ExceptionOccurred,
3234 jni_ExceptionDescribe,
3235 jni_ExceptionClear,
3236 jni_FatalError,
3237
3238 jni_PushLocalFrame,
3239 jni_PopLocalFrame,
3240
3241 jni_NewGlobalRef,
3242 jni_DeleteGlobalRef,
3243 jni_DeleteLocalRef,
3244 jni_IsSameObject,
3245
3246 jni_NewLocalRef,
3247 jni_EnsureLocalCapacity,
3248
3249 jni_AllocObject,
3250 jni_NewObject,
3251 jni_NewObjectV,
3252 jni_NewObjectA,
3253
3254 jni_GetObjectClass,
3255 jni_IsInstanceOf,
3256
3257 jni_GetMethodID,
3258
3259 jni_CallObjectMethod,
3260 jni_CallObjectMethodV,
3261 jni_CallObjectMethodA,
3262 jni_CallBooleanMethod,
3263 jni_CallBooleanMethodV,
3264 jni_CallBooleanMethodA,
3265 jni_CallByteMethod,
3266 jni_CallByteMethodV,
3267 jni_CallByteMethodA,
3268 jni_CallCharMethod,
3269 jni_CallCharMethodV,
3270 jni_CallCharMethodA,
3271 jni_CallShortMethod,
3272 jni_CallShortMethodV,
3273 jni_CallShortMethodA,
3274 jni_CallIntMethod,
3275 jni_CallIntMethodV,
3276 jni_CallIntMethodA,
3277 jni_CallLongMethod,
3278 jni_CallLongMethodV,
3279 jni_CallLongMethodA,
3280 jni_CallFloatMethod,
3281 jni_CallFloatMethodV,
3282 jni_CallFloatMethodA,
3283 jni_CallDoubleMethod,
3284 jni_CallDoubleMethodV,
3285 jni_CallDoubleMethodA,
3286 jni_CallVoidMethod,
3287 jni_CallVoidMethodV,
3288 jni_CallVoidMethodA,
3289
3290 jni_CallNonvirtualObjectMethod,
3291 jni_CallNonvirtualObjectMethodV,
3292 jni_CallNonvirtualObjectMethodA,
3293 jni_CallNonvirtualBooleanMethod,
3294 jni_CallNonvirtualBooleanMethodV,
3295 jni_CallNonvirtualBooleanMethodA,
3296 jni_CallNonvirtualByteMethod,
3297 jni_CallNonvirtualByteMethodV,
3298 jni_CallNonvirtualByteMethodA,
3299 jni_CallNonvirtualCharMethod,
3300 jni_CallNonvirtualCharMethodV,
3301 jni_CallNonvirtualCharMethodA,
3302 jni_CallNonvirtualShortMethod,
3303 jni_CallNonvirtualShortMethodV,
3304 jni_CallNonvirtualShortMethodA,
3305 jni_CallNonvirtualIntMethod,
3306 jni_CallNonvirtualIntMethodV,
3307 jni_CallNonvirtualIntMethodA,
3308 jni_CallNonvirtualLongMethod,
3309 jni_CallNonvirtualLongMethodV,
3310 jni_CallNonvirtualLongMethodA,
3311 jni_CallNonvirtualFloatMethod,
3312 jni_CallNonvirtualFloatMethodV,
3313 jni_CallNonvirtualFloatMethodA,
3314 jni_CallNonvirtualDoubleMethod,
3315 jni_CallNonvirtualDoubleMethodV,
3316 jni_CallNonvirtualDoubleMethodA,
3317 jni_CallNonvirtualVoidMethod,
3318 jni_CallNonvirtualVoidMethodV,
3319 jni_CallNonvirtualVoidMethodA,
3320
3321 jni_GetFieldID,
3322
3323 jni_GetObjectField,
3324 jni_GetBooleanField,
3325 jni_GetByteField,
3326 jni_GetCharField,
3327 jni_GetShortField,
3328 jni_GetIntField,
3329 jni_GetLongField,
3330 jni_GetFloatField,
3331 jni_GetDoubleField,
3332
3333 jni_SetObjectField,
3334 jni_SetBooleanField,
3335 jni_SetByteField,
3336 jni_SetCharField,
3337 jni_SetShortField,
3338 jni_SetIntField,
3339 jni_SetLongField,
3340 jni_SetFloatField,
3341 jni_SetDoubleField,
3342
3343 jni_GetStaticMethodID,
3344
3345 jni_CallStaticObjectMethod,
3346 jni_CallStaticObjectMethodV,
3347 jni_CallStaticObjectMethodA,
3348 jni_CallStaticBooleanMethod,
3349 jni_CallStaticBooleanMethodV,
3350 jni_CallStaticBooleanMethodA,
3351 jni_CallStaticByteMethod,
3352 jni_CallStaticByteMethodV,
3353 jni_CallStaticByteMethodA,
3354 jni_CallStaticCharMethod,
3355 jni_CallStaticCharMethodV,
3356 jni_CallStaticCharMethodA,
3357 jni_CallStaticShortMethod,
3358 jni_CallStaticShortMethodV,
3359 jni_CallStaticShortMethodA,
3360 jni_CallStaticIntMethod,
3361 jni_CallStaticIntMethodV,
3362 jni_CallStaticIntMethodA,
3363 jni_CallStaticLongMethod,
3364 jni_CallStaticLongMethodV,
3365 jni_CallStaticLongMethodA,
3366 jni_CallStaticFloatMethod,
3367 jni_CallStaticFloatMethodV,
3368 jni_CallStaticFloatMethodA,
3369 jni_CallStaticDoubleMethod,
3370 jni_CallStaticDoubleMethodV,
3371 jni_CallStaticDoubleMethodA,
3372 jni_CallStaticVoidMethod,
3373 jni_CallStaticVoidMethodV,
3374 jni_CallStaticVoidMethodA,
3375
3376 jni_GetStaticFieldID,
3377
3378 jni_GetStaticObjectField,
3379 jni_GetStaticBooleanField,
3380 jni_GetStaticByteField,
3381 jni_GetStaticCharField,
3382 jni_GetStaticShortField,
3383 jni_GetStaticIntField,
3384 jni_GetStaticLongField,
3385 jni_GetStaticFloatField,
3386 jni_GetStaticDoubleField,
3387
3388 jni_SetStaticObjectField,
3389 jni_SetStaticBooleanField,
3390 jni_SetStaticByteField,
3391 jni_SetStaticCharField,
3392 jni_SetStaticShortField,
3393 jni_SetStaticIntField,
3394 jni_SetStaticLongField,
3395 jni_SetStaticFloatField,
3396 jni_SetStaticDoubleField,
3397
3398 jni_NewString,
3399 jni_GetStringLength,
3400 jni_GetStringChars,
3401 jni_ReleaseStringChars,
3402
3403 jni_NewStringUTF,
3404 jni_GetStringUTFLength,
3405 jni_GetStringUTFChars,
3406 jni_ReleaseStringUTFChars,
3407
3408 jni_GetArrayLength,
3409
3410 jni_NewObjectArray,
3411 jni_GetObjectArrayElement,
3412 jni_SetObjectArrayElement,
3413
3414 jni_NewBooleanArray,
3415 jni_NewByteArray,
3416 jni_NewCharArray,
3417 jni_NewShortArray,
3418 jni_NewIntArray,
3419 jni_NewLongArray,
3420 jni_NewFloatArray,
3421 jni_NewDoubleArray,
3422
3423 jni_GetBooleanArrayElements,
3424 jni_GetByteArrayElements,
3425 jni_GetCharArrayElements,
3426 jni_GetShortArrayElements,
3427 jni_GetIntArrayElements,
3428 jni_GetLongArrayElements,
3429 jni_GetFloatArrayElements,
3430 jni_GetDoubleArrayElements,
3431
3432 jni_ReleaseBooleanArrayElements,
3433 jni_ReleaseByteArrayElements,
3434 jni_ReleaseCharArrayElements,
3435 jni_ReleaseShortArrayElements,
3436 jni_ReleaseIntArrayElements,
3437 jni_ReleaseLongArrayElements,
3438 jni_ReleaseFloatArrayElements,
3439 jni_ReleaseDoubleArrayElements,
3440
3441 jni_GetBooleanArrayRegion,
3442 jni_GetByteArrayRegion,
3443 jni_GetCharArrayRegion,
3444 jni_GetShortArrayRegion,
3445 jni_GetIntArrayRegion,
3446 jni_GetLongArrayRegion,
3447 jni_GetFloatArrayRegion,
3448 jni_GetDoubleArrayRegion,
3449
3450 jni_SetBooleanArrayRegion,
3451 jni_SetByteArrayRegion,
3452 jni_SetCharArrayRegion,
3453 jni_SetShortArrayRegion,
3454 jni_SetIntArrayRegion,
3455 jni_SetLongArrayRegion,
3456 jni_SetFloatArrayRegion,
3457 jni_SetDoubleArrayRegion,
3458
3459 jni_RegisterNatives,
3460 jni_UnregisterNatives,
3461
3462 jni_MonitorEnter,
3463 jni_MonitorExit,
3464
3465 jni_GetJavaVM,
3466
3467 jni_GetStringRegion,
3468 jni_GetStringUTFRegion,
3469
3470 jni_GetPrimitiveArrayCritical,
3471 jni_ReleasePrimitiveArrayCritical,
3472
3473 jni_GetStringCritical,
3474 jni_ReleaseStringCritical,
3475
3476 jni_NewWeakGlobalRef,
3477 jni_DeleteWeakGlobalRef,
3478
3479 jni_ExceptionCheck,
3480
3481 jni_NewDirectByteBuffer,
3482 jni_GetDirectBufferAddress,
3483 jni_GetDirectBufferCapacity,
3484
3485 // New 1_6 features
3486
3487 jni_GetObjectRefType,
3488
3489 // Module features
3490
3491 jni_GetModule,
3492
3493 // Virtual threads
3494
3495 jni_IsVirtualThread,
3496
3497 // Large UTF8 support
3498
3499 jni_GetStringUTFLengthAsLong
3500 };
3501
3502
3503 // For jvmti use to modify jni function table.
3504 // Java threads in native contiues to run until it is transitioned
3505 // to VM at safepoint. Before the transition or before it is blocked
3506 // for safepoint it may access jni function table. VM could crash if
3507 // any java thread access the jni function table in the middle of memcpy.
3508 // To avoid this each function pointers are copied automically.
3509 void copy_jni_function_table(const struct JNINativeInterface_ *new_jni_NativeInterface) {
3510 assert(SafepointSynchronize::is_at_safepoint(), "must be at safepoint");
3511 intptr_t *a = (intptr_t *) jni_functions();
3512 intptr_t *b = (intptr_t *) new_jni_NativeInterface;
3513 for (uint i=0; i < sizeof(struct JNINativeInterface_)/sizeof(void *); i++) {
3514 AtomicAccess::store(a++, *b++);
3515 }
3516 }
3517
3518 void quicken_jni_functions() {
3519 // Replace Get<Primitive>Field with fast versions
3520 if (UseFastJNIAccessors && !VerifyJNIFields && !CheckJNICalls) {
3521 address func;
3522 func = JNI_FastGetField::generate_fast_get_boolean_field();
3523 if (func != (address)-1) {
3524 jni_NativeInterface.GetBooleanField = (GetBooleanField_t)func;
3525 }
3526 func = JNI_FastGetField::generate_fast_get_byte_field();
3527 if (func != (address)-1) {
3528 jni_NativeInterface.GetByteField = (GetByteField_t)func;
3529 }
3530 func = JNI_FastGetField::generate_fast_get_char_field();
3531 if (func != (address)-1) {
3532 jni_NativeInterface.GetCharField = (GetCharField_t)func;
3533 }
3534 func = JNI_FastGetField::generate_fast_get_short_field();
3535 if (func != (address)-1) {
3536 jni_NativeInterface.GetShortField = (GetShortField_t)func;
3537 }
3538 func = JNI_FastGetField::generate_fast_get_int_field();
3539 if (func != (address)-1) {
3540 jni_NativeInterface.GetIntField = (GetIntField_t)func;
3541 }
3542 func = JNI_FastGetField::generate_fast_get_long_field();
3543 if (func != (address)-1) {
3544 jni_NativeInterface.GetLongField = (GetLongField_t)func;
3545 }
3546 func = JNI_FastGetField::generate_fast_get_float_field();
3547 if (func != (address)-1) {
3548 jni_NativeInterface.GetFloatField = (GetFloatField_t)func;
3549 }
3550 func = JNI_FastGetField::generate_fast_get_double_field();
3551 if (func != (address)-1) {
3552 jni_NativeInterface.GetDoubleField = (GetDoubleField_t)func;
3553 }
3554 }
3555 }
3556
3557 // Returns the function structure
3558 struct JNINativeInterface_* jni_functions() {
3559 #if INCLUDE_JNI_CHECK
3560 if (CheckJNICalls) return jni_functions_check();
3561 #endif // INCLUDE_JNI_CHECK
3562 return &jni_NativeInterface;
3563 }
3564
3565 // Returns the function structure
3566 struct JNINativeInterface_* jni_functions_nocheck() {
3567 return &jni_NativeInterface;
3568 }
3569
3570
3571 // Invocation API
3572
3573
3574 // Forward declaration
3575 extern const struct JNIInvokeInterface_ jni_InvokeInterface;
3576
3577 // Global invocation API vars
3578 enum VM_Creation_State {
3579 NOT_CREATED = 0,
3580 IN_PROGRESS, // Most JNI operations are permitted during this phase to
3581 // allow for initialization actions by libraries and agents.
3582 COMPLETE
3583 };
3584
3585 volatile VM_Creation_State vm_created = NOT_CREATED;
3586
3587 bool is_vm_created() {
3588 return AtomicAccess::load(&vm_created) == COMPLETE;
3589 }
3590
3591 // Indicate whether it is safe to recreate VM. Recreation is only
3592 // possible after a failed initial creation attempt in some cases.
3593 volatile int safe_to_recreate_vm = 1;
3594 struct JavaVM_ main_vm = {&jni_InvokeInterface};
3595
3596
3597 #define JAVASTACKSIZE (400 * 1024) /* Default size of a thread java stack */
3598 enum { VERIFY_NONE, VERIFY_REMOTE, VERIFY_ALL };
3599
3600 DT_RETURN_MARK_DECL(GetDefaultJavaVMInitArgs, jint
3601 , HOTSPOT_JNI_GETDEFAULTJAVAVMINITARGS_RETURN(_ret_ref));
3602
3603 _JNI_IMPORT_OR_EXPORT_ jint JNICALL JNI_GetDefaultJavaVMInitArgs(void *args_) {
3604 HOTSPOT_JNI_GETDEFAULTJAVAVMINITARGS_ENTRY(args_);
3605 JDK1_1InitArgs *args = (JDK1_1InitArgs *)args_;
3606 jint ret = JNI_ERR;
3607 DT_RETURN_MARK(GetDefaultJavaVMInitArgs, jint, (const jint&)ret);
3608
3609 if (Threads::is_supported_jni_version(args->version)) {
3610 ret = JNI_OK;
3611 }
3612 // 1.1 style no longer supported in hotspot.
3613 // According the JNI spec, we should update args->version on return.
3614 // We also use the structure to communicate with launcher about default
3615 // stack size.
3616 if (args->version == JNI_VERSION_1_1) {
3617 args->version = JNI_VERSION_1_2;
3618 // javaStackSize is int in arguments structure
3619 assert(jlong(ThreadStackSize) * K < INT_MAX, "integer overflow");
3620 args->javaStackSize = (jint)(ThreadStackSize * K);
3621 }
3622 return ret;
3623 }
3624
3625 DT_RETURN_MARK_DECL(CreateJavaVM, jint
3626 , HOTSPOT_JNI_CREATEJAVAVM_RETURN(_ret_ref));
3627
3628 static jint JNI_CreateJavaVM_inner(JavaVM **vm, void **penv, void *args) {
3629 HOTSPOT_JNI_CREATEJAVAVM_ENTRY((void **) vm, penv, args);
3630
3631 jint result = JNI_ERR;
3632 DT_RETURN_MARK(CreateJavaVM, jint, (const jint&)result);
3633
3634 // We're about to use AtomicAccess::xchg for synchronization. Some Zero
3635 // platforms use the GCC builtin __sync_lock_test_and_set for this,
3636 // but __sync_lock_test_and_set is not guaranteed to do what we want
3637 // on all architectures. So we check it works before relying on it.
3638 #if defined(ZERO) && defined(ASSERT)
3639 {
3640 jint a = 0xcafebabe;
3641 jint b = AtomicAccess::xchg(&a, (jint) 0xdeadbeef);
3642 void *c = &a;
3643 void *d = AtomicAccess::xchg(&c, &b);
3644 assert(a == (jint) 0xdeadbeef && b == (jint) 0xcafebabe, "AtomicAccess::xchg() works");
3645 assert(c == &b && d == &a, "AtomicAccess::xchg() works");
3646 }
3647 #endif // ZERO && ASSERT
3648
3649 // At the moment it's only possible to have one Java VM,
3650 // since some of the runtime state is in global variables.
3651
3652 // We cannot use our mutex locks here, since they only work on
3653 // Threads. We do an atomic compare and exchange to ensure only
3654 // one thread can call this method at a time
3655
3656 // We use AtomicAccess::xchg rather than AtomicAccess::add/dec since on some platforms
3657 // the add/dec implementations are dependent on whether we are running
3658 // on a multiprocessor AtomicAccess::xchg does not have this problem.
3659 if (AtomicAccess::xchg(&vm_created, IN_PROGRESS) != NOT_CREATED) {
3660 return JNI_EEXIST; // already created, or create attempt in progress
3661 }
3662
3663 // If a previous creation attempt failed but can be retried safely,
3664 // then safe_to_recreate_vm will have been reset to 1 after being
3665 // cleared here. If a previous creation attempt succeeded and we then
3666 // destroyed that VM, we will be prevented from trying to recreate
3667 // the VM in the same process, as the value will still be 0.
3668 if (AtomicAccess::xchg(&safe_to_recreate_vm, 0) == 0) {
3669 return JNI_ERR;
3670 }
3671
3672 /**
3673 * Certain errors during initialization are recoverable and do not
3674 * prevent this method from being called again at a later time
3675 * (perhaps with different arguments). However, at a certain
3676 * point during initialization if an error occurs we cannot allow
3677 * this function to be called again (or it will crash). In those
3678 * situations, the 'canTryAgain' flag is set to false, which atomically
3679 * sets safe_to_recreate_vm to 1, such that any new call to
3680 * JNI_CreateJavaVM will immediately fail using the above logic.
3681 */
3682 bool can_try_again = true;
3683
3684 result = Threads::create_vm((JavaVMInitArgs*) args, &can_try_again);
3685 if (result == JNI_OK) {
3686 JavaThread *thread = JavaThread::current();
3687 assert(!thread->has_pending_exception(), "should have returned not OK");
3688 // thread is thread_in_vm here
3689 *vm = (JavaVM *)(&main_vm);
3690 *(JNIEnv**)penv = thread->jni_environment();
3691 // mark creation complete for other JNI ops
3692 AtomicAccess::release_store(&vm_created, COMPLETE);
3693
3694 #if INCLUDE_JVMCI
3695 if (EnableJVMCI) {
3696 if (UseJVMCICompiler) {
3697 // JVMCI is initialized on a CompilerThread
3698 if (BootstrapJVMCI) {
3699 JavaThread* THREAD = thread; // For exception macros.
3700 JVMCICompiler* compiler = JVMCICompiler::instance(true, CATCH);
3701 compiler->bootstrap(THREAD);
3702 if (HAS_PENDING_EXCEPTION) {
3703 HandleMark hm(THREAD);
3704 vm_exit_during_initialization(Handle(THREAD, PENDING_EXCEPTION));
3705 }
3706 }
3707 }
3708 }
3709 #endif
3710
3711 // Notify JVMTI
3712 if (JvmtiExport::should_post_thread_life()) {
3713 JvmtiExport::post_thread_start(thread);
3714 }
3715
3716 JFR_ONLY(Jfr::on_thread_start(thread);)
3717
3718 if (ReplayCompiles) ciReplay::replay(thread);
3719
3720 #ifdef ASSERT
3721 // Some platforms (like Win*) need a wrapper around these test
3722 // functions in order to properly handle error conditions.
3723 if (ErrorHandlerTest != 0) {
3724 VMError::controlled_crash(ErrorHandlerTest);
3725 }
3726 #endif
3727
3728 // Since this is not a JVM_ENTRY we have to set the thread state manually before leaving.
3729 ThreadStateTransition::transition_from_vm(thread, _thread_in_native);
3730 MACOS_AARCH64_ONLY(thread->enable_wx(WXExec));
3731 } else {
3732 // If create_vm exits because of a pending exception, exit with that
3733 // exception. In the future when we figure out how to reclaim memory,
3734 // we may be able to exit with JNI_ERR and allow the calling application
3735 // to continue.
3736 if (Universe::is_fully_initialized()) {
3737 // otherwise no pending exception possible - VM will already have aborted
3738 Thread* current = Thread::current_or_null();
3739 if (current != nullptr) {
3740 JavaThread* THREAD = JavaThread::cast(current); // For exception macros.
3741 assert(HAS_PENDING_EXCEPTION, "must be - else no current thread exists");
3742 HandleMark hm(THREAD);
3743 vm_exit_during_initialization(Handle(THREAD, PENDING_EXCEPTION));
3744 }
3745 }
3746
3747 if (can_try_again) {
3748 // reset safe_to_recreate_vm to 1 so that retrial would be possible
3749 safe_to_recreate_vm = 1;
3750 }
3751
3752 // Creation failed. We must reset vm_created
3753 *vm = nullptr;
3754 *(JNIEnv**)penv = nullptr;
3755 // reset vm_created last to avoid race condition. Use OrderAccess to
3756 // control both compiler and architectural-based reordering.
3757 assert(vm_created == IN_PROGRESS, "must be");
3758 AtomicAccess::release_store(&vm_created, NOT_CREATED);
3759 }
3760
3761 // Flush stdout and stderr before exit.
3762 fflush(stdout);
3763 fflush(stderr);
3764
3765 return result;
3766
3767 }
3768
3769 _JNI_IMPORT_OR_EXPORT_ jint JNICALL JNI_CreateJavaVM(JavaVM **vm, void **penv, void *args) {
3770 jint result = JNI_ERR;
3771 // On Windows, let CreateJavaVM run with SEH protection
3772 #if defined(_WIN32) && !defined(USE_VECTORED_EXCEPTION_HANDLING)
3773 __try {
3774 #endif
3775 result = JNI_CreateJavaVM_inner(vm, penv, args);
3776 #if defined(_WIN32) && !defined(USE_VECTORED_EXCEPTION_HANDLING)
3777 } __except(topLevelExceptionFilter((_EXCEPTION_POINTERS*)_exception_info())) {
3778 // Nothing to do.
3779 }
3780 #endif
3781 return result;
3782 }
3783
3784 _JNI_IMPORT_OR_EXPORT_ jint JNICALL JNI_GetCreatedJavaVMs(JavaVM **vm_buf, jsize bufLen, jsize *numVMs) {
3785 HOTSPOT_JNI_GETCREATEDJAVAVMS_ENTRY((void **) vm_buf, bufLen, (uintptr_t *) numVMs);
3786
3787 if (vm_created == COMPLETE) {
3788 if (numVMs != nullptr) *numVMs = 1;
3789 if (bufLen > 0) *vm_buf = (JavaVM *)(&main_vm);
3790 } else {
3791 if (numVMs != nullptr) *numVMs = 0;
3792 }
3793 HOTSPOT_JNI_GETCREATEDJAVAVMS_RETURN(JNI_OK);
3794 return JNI_OK;
3795 }
3796
3797 extern "C" {
3798
3799 DT_RETURN_MARK_DECL(DestroyJavaVM, jint
3800 , HOTSPOT_JNI_DESTROYJAVAVM_RETURN(_ret_ref));
3801
3802 static jint JNICALL jni_DestroyJavaVM_inner(JavaVM *vm) {
3803 HOTSPOT_JNI_DESTROYJAVAVM_ENTRY(vm);
3804 jint res = JNI_ERR;
3805 DT_RETURN_MARK(DestroyJavaVM, jint, (const jint&)res);
3806
3807 if (vm_created == NOT_CREATED) {
3808 res = JNI_ERR;
3809 return res;
3810 }
3811
3812 JNIEnv *env;
3813 JavaVMAttachArgs destroyargs;
3814 destroyargs.version = CurrentVersion;
3815 destroyargs.name = (char *)"DestroyJavaVM";
3816 destroyargs.group = nullptr;
3817 res = vm->AttachCurrentThread((void **)&env, (void *)&destroyargs);
3818 if (res != JNI_OK) {
3819 return res;
3820 }
3821
3822 JavaThread* thread = JavaThread::current();
3823
3824 // Make sure we are actually in a newly attached thread, with no
3825 // existing Java frame.
3826 if (thread->has_last_Java_frame()) {
3827 return JNI_ERR;
3828 }
3829
3830 // Since this is not a JVM_ENTRY we have to set the thread state manually before entering.
3831
3832 // We are going to VM, change W^X state to the expected one.
3833 MACOS_AARCH64_ONLY(WXMode oldmode = thread->enable_wx(WXWrite));
3834
3835 ThreadStateTransition::transition_from_native(thread, _thread_in_vm);
3836 Threads::destroy_vm();
3837 // Don't bother restoring thread state, VM is gone.
3838 vm_created = NOT_CREATED;
3839 return JNI_OK;
3840 }
3841
3842 jint JNICALL jni_DestroyJavaVM(JavaVM *vm) {
3843 jint result = JNI_ERR;
3844 // On Windows, we need SEH protection
3845 #if defined(_WIN32) && !defined(USE_VECTORED_EXCEPTION_HANDLING)
3846 __try {
3847 #endif
3848 result = jni_DestroyJavaVM_inner(vm);
3849 #if defined(_WIN32) && !defined(USE_VECTORED_EXCEPTION_HANDLING)
3850 } __except(topLevelExceptionFilter((_EXCEPTION_POINTERS*)_exception_info())) {
3851 // Nothing to do.
3852 }
3853 #endif
3854 return result;
3855 }
3856
3857 static jint attach_current_thread(JavaVM *vm, void **penv, void *_args, bool daemon) {
3858 JavaVMAttachArgs *args = (JavaVMAttachArgs *) _args;
3859
3860 // Check below commented out from JDK1.2fcs as well
3861 /*
3862 if (args && (args->version != JNI_VERSION_1_1 || args->version != JNI_VERSION_1_2)) {
3863 return JNI_EVERSION;
3864 }
3865 */
3866
3867 Thread* t = Thread::current_or_null();
3868 if (t != nullptr) {
3869 // If executing from an atexit hook we may be in the VMThread.
3870 if (t->is_Java_thread()) {
3871 // If the thread has been attached this operation is a no-op
3872 *(JNIEnv**)penv = JavaThread::cast(t)->jni_environment();
3873 return JNI_OK;
3874 } else {
3875 return JNI_ERR;
3876 }
3877 }
3878
3879 // Create a thread and mark it as attaching so it will be skipped by the
3880 // ThreadsListEnumerator - see CR 6404306
3881 JavaThread* thread = JavaThread::create_attaching_thread();
3882
3883 // Set correct safepoint info. The thread is going to call into Java when
3884 // initializing the Java level thread object. Hence, the correct state must
3885 // be set in order for the Safepoint code to deal with it correctly.
3886 thread->set_thread_state(_thread_in_vm);
3887 thread->record_stack_base_and_size();
3888 thread->initialize_thread_current();
3889 thread->register_thread_stack_with_NMT();
3890 MACOS_AARCH64_ONLY(thread->init_wx());
3891
3892 if (!os::create_attached_thread(thread)) {
3893 thread->unregister_thread_stack_with_NMT();
3894 thread->smr_delete();
3895 return JNI_ERR;
3896 }
3897 // Enable stack overflow checks
3898 thread->stack_overflow_state()->create_stack_guard_pages();
3899
3900 thread->initialize_tlab();
3901
3902 thread->cache_global_variables();
3903
3904 // Set the _monitor_owner_id to the next thread_id temporarily while initialization runs.
3905 // Do it now before we make this thread visible in Threads::add().
3906 thread->set_monitor_owner_id(ThreadIdentifier::next());
3907
3908 // This thread will not do a safepoint check, since it has
3909 // not been added to the Thread list yet.
3910 { MutexLocker ml(Threads_lock);
3911 // This must be inside this lock in order to get FullGCALot to work properly, i.e., to
3912 // avoid this thread trying to do a GC before it is added to the thread-list
3913 thread->set_active_handles(JNIHandleBlock::allocate_block());
3914 Threads::add(thread, daemon);
3915 }
3916 // Create thread group and name info from attach arguments
3917 oop group = nullptr;
3918 char* thread_name = nullptr;
3919 if (args != nullptr && Threads::is_supported_jni_version(args->version)) {
3920 group = JNIHandles::resolve(args->group);
3921 thread_name = args->name; // may be null
3922 }
3923 if (group == nullptr) group = Universe::main_thread_group();
3924
3925 // Create Java level thread object and attach it to this thread
3926 bool attach_failed = false;
3927 {
3928 EXCEPTION_MARK;
3929 HandleMark hm(THREAD);
3930 Handle thread_group(THREAD, group);
3931 thread->allocate_threadObj(thread_group, thread_name, daemon, THREAD);
3932 if (HAS_PENDING_EXCEPTION) {
3933 CLEAR_PENDING_EXCEPTION;
3934 // cleanup outside the handle mark.
3935 attach_failed = true;
3936 }
3937 }
3938
3939 if (attach_failed) {
3940 // Added missing cleanup
3941 thread->cleanup_failed_attach_current_thread(daemon);
3942 thread->unregister_thread_stack_with_NMT();
3943 thread->smr_delete();
3944 return JNI_ERR;
3945 }
3946
3947 // Update the _monitor_owner_id with the tid value.
3948 thread->set_monitor_owner_id(java_lang_Thread::thread_id(thread->threadObj()));
3949
3950 // Want this inside 'attaching via jni'.
3951 JFR_ONLY(Jfr::on_thread_start(thread);)
3952
3953 // mark the thread as no longer attaching
3954 // this uses a fence to push the change through so we don't have
3955 // to regrab the threads_lock
3956 thread->set_done_attaching_via_jni();
3957
3958 // Set java thread status.
3959 java_lang_Thread::set_thread_status(thread->threadObj(),
3960 JavaThreadStatus::RUNNABLE);
3961
3962 // Notify the debugger
3963 if (JvmtiExport::should_post_thread_life()) {
3964 JvmtiExport::post_thread_start(thread);
3965 }
3966
3967 *(JNIEnv**)penv = thread->jni_environment();
3968
3969 // Now leaving the VM, so change thread_state. This is normally automatically taken care
3970 // of in the JVM_ENTRY. But in this situation we have to do it manually.
3971 ThreadStateTransition::transition_from_vm(thread, _thread_in_native);
3972 MACOS_AARCH64_ONLY(thread->enable_wx(WXExec));
3973
3974 // Perform any platform dependent FPU setup
3975 os::setup_fpu();
3976
3977 return JNI_OK;
3978 }
3979
3980
3981 jint JNICALL jni_AttachCurrentThread(JavaVM *vm, void **penv, void *_args) {
3982 HOTSPOT_JNI_ATTACHCURRENTTHREAD_ENTRY(vm, penv, _args);
3983 if (vm_created == NOT_CREATED) {
3984 // Not sure how we could possibly get here.
3985 HOTSPOT_JNI_ATTACHCURRENTTHREAD_RETURN((uint32_t) JNI_ERR);
3986 return JNI_ERR;
3987 }
3988
3989 jint ret = attach_current_thread(vm, penv, _args, false);
3990 HOTSPOT_JNI_ATTACHCURRENTTHREAD_RETURN(ret);
3991 return ret;
3992 }
3993
3994
3995 jint JNICALL jni_DetachCurrentThread(JavaVM *vm) {
3996 HOTSPOT_JNI_DETACHCURRENTTHREAD_ENTRY(vm);
3997 if (vm_created == NOT_CREATED) {
3998 // Not sure how we could possibly get here.
3999 HOTSPOT_JNI_DETACHCURRENTTHREAD_RETURN(JNI_ERR);
4000 return JNI_ERR;
4001 }
4002
4003 Thread* current = Thread::current_or_null();
4004
4005 // If the thread has already been detached the operation is a no-op
4006 if (current == nullptr) {
4007 HOTSPOT_JNI_DETACHCURRENTTHREAD_RETURN(JNI_OK);
4008 return JNI_OK;
4009 }
4010
4011 // If executing from an atexit hook we may be in the VMThread.
4012 if (!current->is_Java_thread()) {
4013 HOTSPOT_JNI_DETACHCURRENTTHREAD_RETURN((uint32_t) JNI_ERR);
4014 return JNI_ERR;
4015 }
4016
4017 VM_Exit::block_if_vm_exited();
4018
4019 JavaThread* thread = JavaThread::cast(current);
4020 if (thread->has_last_Java_frame()) {
4021 HOTSPOT_JNI_DETACHCURRENTTHREAD_RETURN((uint32_t) JNI_ERR);
4022 // Can't detach a thread that's running java, that can't work.
4023 return JNI_ERR;
4024 }
4025
4026 // We are going to VM, change W^X state to the expected one.
4027 MACOS_AARCH64_ONLY(thread->enable_wx(WXWrite));
4028
4029 // Safepoint support. Have to do call-back to safepoint code, if in the
4030 // middle of a safepoint operation
4031 ThreadStateTransition::transition_from_native(thread, _thread_in_vm);
4032
4033 // XXX: Note that JavaThread::exit() call below removes the guards on the
4034 // stack pages set up via enable_stack_{red,yellow}_zone() calls
4035 // above in jni_AttachCurrentThread. Unfortunately, while the setting
4036 // of the guards is visible in jni_AttachCurrentThread above,
4037 // the removal of the guards is buried below in JavaThread::exit()
4038 // here. The abstraction should be more symmetrically either exposed
4039 // or hidden (e.g. it could probably be hidden in the same
4040 // (platform-dependent) methods where we do alternate stack
4041 // maintenance work?)
4042 thread->exit(false, JavaThread::jni_detach);
4043 thread->unregister_thread_stack_with_NMT();
4044 thread->smr_delete();
4045
4046 // Go to the execute mode, the initial state of the thread on creation.
4047 // Use os interface as the thread is not a JavaThread anymore.
4048 MACOS_AARCH64_ONLY(os::current_thread_enable_wx(WXExec));
4049
4050 HOTSPOT_JNI_DETACHCURRENTTHREAD_RETURN(JNI_OK);
4051 return JNI_OK;
4052 }
4053
4054 DT_RETURN_MARK_DECL(GetEnv, jint
4055 , HOTSPOT_JNI_GETENV_RETURN(_ret_ref));
4056
4057 jint JNICALL jni_GetEnv(JavaVM *vm, void **penv, jint version) {
4058 HOTSPOT_JNI_GETENV_ENTRY(vm, penv, version);
4059 jint ret = JNI_ERR;
4060 DT_RETURN_MARK(GetEnv, jint, (const jint&)ret);
4061
4062 if (vm_created == NOT_CREATED) {
4063 *penv = nullptr;
4064 ret = JNI_EDETACHED;
4065 return ret;
4066 }
4067
4068 if (JniExportedInterface::GetExportedInterface(vm, penv, version, &ret)) {
4069 return ret;
4070 }
4071
4072 #ifndef JVMPI_VERSION_1
4073 // need these in order to be polite about older agents
4074 #define JVMPI_VERSION_1 ((jint)0x10000001)
4075 #define JVMPI_VERSION_1_1 ((jint)0x10000002)
4076 #define JVMPI_VERSION_1_2 ((jint)0x10000003)
4077 #endif // !JVMPI_VERSION_1
4078
4079 Thread* thread = Thread::current_or_null();
4080 if (thread != nullptr && thread->is_Java_thread()) {
4081 if (Threads::is_supported_jni_version_including_1_1(version)) {
4082 *(JNIEnv**)penv = JavaThread::cast(thread)->jni_environment();
4083 ret = JNI_OK;
4084 return ret;
4085
4086 } else if (version == JVMPI_VERSION_1 ||
4087 version == JVMPI_VERSION_1_1 ||
4088 version == JVMPI_VERSION_1_2) {
4089 tty->print_cr("ERROR: JVMPI, an experimental interface, is no longer supported.");
4090 tty->print_cr("Please use the supported interface: the JVM Tool Interface (JVM TI).");
4091 ret = JNI_EVERSION;
4092 return ret;
4093 } else if (JvmtiExport::is_jvmdi_version(version)) {
4094 tty->print_cr("FATAL ERROR: JVMDI is no longer supported.");
4095 tty->print_cr("Please use the supported interface: the JVM Tool Interface (JVM TI).");
4096 ret = JNI_EVERSION;
4097 return ret;
4098 } else {
4099 *penv = nullptr;
4100 ret = JNI_EVERSION;
4101 return ret;
4102 }
4103 } else {
4104 *penv = nullptr;
4105 ret = JNI_EDETACHED;
4106 return ret;
4107 }
4108 }
4109
4110
4111 jint JNICALL jni_AttachCurrentThreadAsDaemon(JavaVM *vm, void **penv, void *_args) {
4112 HOTSPOT_JNI_ATTACHCURRENTTHREADASDAEMON_ENTRY(vm, penv, _args);
4113 if (vm_created == NOT_CREATED) {
4114 // Not sure how we could possibly get here.
4115 HOTSPOT_JNI_ATTACHCURRENTTHREADASDAEMON_RETURN((uint32_t) JNI_ERR);
4116 return JNI_ERR;
4117 }
4118
4119 jint ret = attach_current_thread(vm, penv, _args, true);
4120 HOTSPOT_JNI_ATTACHCURRENTTHREADASDAEMON_RETURN(ret);
4121 return ret;
4122 }
4123
4124
4125 } // End extern "C"
4126
4127 const struct JNIInvokeInterface_ jni_InvokeInterface = {
4128 nullptr,
4129 nullptr,
4130 nullptr,
4131
4132 jni_DestroyJavaVM,
4133 jni_AttachCurrentThread,
4134 jni_DetachCurrentThread,
4135 jni_GetEnv,
4136 jni_AttachCurrentThreadAsDaemon
4137 };