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