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_JVMCI
99 #include "jvmci/jvmciCompiler.hpp"
100 #endif
101 #if INCLUDE_JFR
102 #include "jfr/jfr.hpp"
103 #endif
104
105 static jint CurrentVersion = JNI_VERSION_24;
106
107 #if defined(_WIN32) && !defined(USE_VECTORED_EXCEPTION_HANDLING)
108 extern LONG WINAPI topLevelExceptionFilter(_EXCEPTION_POINTERS* );
109 #endif
110
111 // The DT_RETURN_MARK macros create a scoped object to fire the dtrace
112 // '-return' probe regardless of the return path is taken out of the function.
113 // Methods that have multiple return paths use this to avoid having to
114 // instrument each return path. Methods that use CHECK or THROW must use this
115 // since those macros can cause an immediate uninstrumented return.
116 //
117 // In order to get the return value, a reference to the variable containing
118 // the return value must be passed to the constructor of the object, and
119 // the return value must be set before return (since the mark object has
120 // a reference to it).
121 //
122 // Example:
123 // DT_RETURN_MARK_DECL(SomeFunc, int);
124 // JNI_ENTRY(int, SomeFunc, ...)
125 // int return_value = 0;
126 // DT_RETURN_MARK(SomeFunc, int, (const int&)return_value);
127 // foo(CHECK_0)
128 // return_value = 5;
129 // return return_value;
130 // JNI_END
131 #define DT_RETURN_MARK_DECL(name, type, probe) \
132 DTRACE_ONLY( \
133 class DTraceReturnProbeMark_##name { \
134 public: \
135 const type& _ret_ref; \
136 DTraceReturnProbeMark_##name(const type& v) : _ret_ref(v) {} \
137 ~DTraceReturnProbeMark_##name() { \
138 probe; \
139 } \
140 } \
141 )
142 // Void functions are simpler since there's no return value
143 #define DT_VOID_RETURN_MARK_DECL(name, probe) \
144 DTRACE_ONLY( \
145 class DTraceReturnProbeMark_##name { \
146 public: \
147 ~DTraceReturnProbeMark_##name() { \
148 probe; \
149 } \
150 } \
151 )
152
153 // Place these macros in the function to mark the return. Non-void
154 // functions need the type and address of the return value.
155 #define DT_RETURN_MARK(name, type, ref) \
156 DTRACE_ONLY( DTraceReturnProbeMark_##name dtrace_return_mark(ref) )
157 #define DT_VOID_RETURN_MARK(name) \
158 DTRACE_ONLY( DTraceReturnProbeMark_##name dtrace_return_mark )
159
160
161 // Use these to select distinct code for floating-point vs. non-floating point
162 // situations. Used from within common macros where we need slightly
163 // different behavior for Float/Double
164 #define FP_SELECT_Boolean(intcode, fpcode) intcode
165 #define FP_SELECT_Byte(intcode, fpcode) intcode
166 #define FP_SELECT_Char(intcode, fpcode) intcode
167 #define FP_SELECT_Short(intcode, fpcode) intcode
168 #define FP_SELECT_Object(intcode, fpcode) intcode
169 #define FP_SELECT_Int(intcode, fpcode) intcode
170 #define FP_SELECT_Long(intcode, fpcode) intcode
171 #define FP_SELECT_Float(intcode, fpcode) fpcode
172 #define FP_SELECT_Double(intcode, fpcode) fpcode
173 #define FP_SELECT(TypeName, intcode, fpcode) \
174 FP_SELECT_##TypeName(intcode, fpcode)
175
176 // Choose DT_RETURN_MARK macros based on the type: float/double -> void
177 // (dtrace doesn't do FP yet)
178 #define DT_RETURN_MARK_DECL_FOR(TypeName, name, type, probe) \
179 FP_SELECT(TypeName, \
180 DT_RETURN_MARK_DECL(name, type, probe), DT_VOID_RETURN_MARK_DECL(name, probe) )
181 #define DT_RETURN_MARK_FOR(TypeName, name, type, ref) \
182 FP_SELECT(TypeName, \
183 DT_RETURN_MARK(name, type, ref), DT_VOID_RETURN_MARK(name) )
184
185
186 // out-of-line helpers for class jfieldIDWorkaround:
187
188 bool jfieldIDWorkaround::is_valid_jfieldID(Klass* k, jfieldID id) {
189 if (jfieldIDWorkaround::is_instance_jfieldID(k, id)) {
190 uintptr_t as_uint = (uintptr_t) id;
191 int offset = raw_instance_offset(id);
192 if (is_checked_jfieldID(id)) {
193 if (!klass_hash_ok(k, id)) {
194 return false;
195 }
196 }
197 return InstanceKlass::cast(k)->contains_field_offset(offset);
198 } else {
199 JNIid* result = (JNIid*) id;
200 #ifdef ASSERT
201 return result != nullptr && result->is_static_field_id();
202 #else
203 return result != nullptr;
204 #endif
205 }
206 }
207
208
209 intptr_t jfieldIDWorkaround::encode_klass_hash(Klass* k, int offset) {
210 if (offset <= small_offset_mask) {
211 Klass* field_klass = k;
212 Klass* super_klass = field_klass->super();
213 // With compressed oops the most super class with nonstatic fields would
214 // be the owner of fields embedded in the header.
215 while (InstanceKlass::cast(super_klass)->has_nonstatic_fields() &&
216 InstanceKlass::cast(super_klass)->contains_field_offset(offset)) {
217 field_klass = super_klass; // super contains the field also
218 super_klass = field_klass->super();
219 }
220 DEBUG_ONLY(NoSafepointVerifier nosafepoint;)
221 uintptr_t klass_hash = field_klass->identity_hash();
222 return ((klass_hash & klass_mask) << klass_shift) | checked_mask_in_place;
223 } else {
224 #if 0
225 #ifndef PRODUCT
226 {
227 ResourceMark rm;
228 warning("VerifyJNIFields: long offset %d in %s", offset, k->external_name());
229 }
230 #endif
231 #endif
232 return 0;
233 }
234 }
235
236 bool jfieldIDWorkaround::klass_hash_ok(Klass* k, jfieldID id) {
237 uintptr_t as_uint = (uintptr_t) id;
238 intptr_t klass_hash = (as_uint >> klass_shift) & klass_mask;
239 do {
240 DEBUG_ONLY(NoSafepointVerifier nosafepoint;)
241 // Could use a non-blocking query for identity_hash here...
242 if ((k->identity_hash() & klass_mask) == klass_hash)
243 return true;
244 k = k->super();
245 } while (k != nullptr);
246 return false;
247 }
248
249 void jfieldIDWorkaround::verify_instance_jfieldID(Klass* k, jfieldID id) {
250 guarantee(jfieldIDWorkaround::is_instance_jfieldID(k, id), "must be an instance field" );
251 uintptr_t as_uint = (uintptr_t) id;
252 int offset = raw_instance_offset(id);
253 if (VerifyJNIFields) {
254 if (is_checked_jfieldID(id)) {
255 guarantee(klass_hash_ok(k, id),
256 "Bug in native code: jfieldID class must match object");
257 } else {
258 #if 0
259 #ifndef PRODUCT
260 if (Verbose) {
261 ResourceMark rm;
262 warning("VerifyJNIFields: unverified offset %d for %s", offset, k->external_name());
263 }
264 #endif
265 #endif
266 }
267 }
268 guarantee(InstanceKlass::cast(k)->contains_field_offset(offset),
269 "Bug in native code: jfieldID offset must address interior of object");
270 }
271
272 // Implementation of JNI entries
273
274 DT_RETURN_MARK_DECL(DefineClass, jclass
275 , HOTSPOT_JNI_DEFINECLASS_RETURN(_ret_ref));
276
277 JNI_ENTRY(jclass, jni_DefineClass(JNIEnv *env, const char *name, jobject loaderRef,
278 const jbyte *buf, jsize bufLen))
279 HOTSPOT_JNI_DEFINECLASS_ENTRY(
280 env, (char*) name, loaderRef, (char*) buf, bufLen);
281
282 jclass cls = nullptr;
283 DT_RETURN_MARK(DefineClass, jclass, (const jclass&)cls);
284
285 // Class resolution will get the class name from the .class stream if the name is null.
286 TempNewSymbol class_name = name == nullptr ? nullptr :
287 SystemDictionary::class_name_symbol(name, vmSymbols::java_lang_NoClassDefFoundError(),
288 CHECK_NULL);
289
290 ResourceMark rm(THREAD);
291 ClassFileStream st((u1*)buf, bufLen, nullptr);
292 Handle class_loader (THREAD, JNIHandles::resolve(loaderRef));
293 Handle protection_domain;
294 ClassLoadInfo cl_info(protection_domain);
295 Klass* k = SystemDictionary::resolve_from_stream(&st, class_name,
296 class_loader,
297 cl_info,
298 CHECK_NULL);
299
300 if (log_is_enabled(Debug, class, resolve)) {
301 trace_class_resolution(k);
302 }
303
304 cls = (jclass)JNIHandles::make_local(THREAD, k->java_mirror());
305 return cls;
306 JNI_END
307
308
309
310 DT_RETURN_MARK_DECL(FindClass, jclass
311 , HOTSPOT_JNI_FINDCLASS_RETURN(_ret_ref));
312
313 JNI_ENTRY(jclass, jni_FindClass(JNIEnv *env, const char *name))
314 HOTSPOT_JNI_FINDCLASS_ENTRY(env, (char *)name);
315
316 jclass result = nullptr;
317 DT_RETURN_MARK(FindClass, jclass, (const jclass&)result);
318
319 // This should be ClassNotFoundException imo.
320 TempNewSymbol class_name =
321 SystemDictionary::class_name_symbol(name, vmSymbols::java_lang_NoClassDefFoundError(),
322 CHECK_NULL);
323
324 // Find calling class
325 Klass* k = thread->security_get_caller_class(0);
326 // default to the system loader when no context
327 Handle loader(THREAD, SystemDictionary::java_system_loader());
328 if (k != nullptr) {
329 // Special handling to make sure JNI_OnLoad and JNI_OnUnload are executed
330 // in the correct class context.
331 if (k->class_loader() == nullptr &&
332 k->name() == vmSymbols::jdk_internal_loader_NativeLibraries()) {
333 JavaValue result(T_OBJECT);
334 JavaCalls::call_static(&result, k,
335 vmSymbols::getFromClass_name(),
336 vmSymbols::void_class_signature(),
337 CHECK_NULL);
338 // When invoked from JNI_OnLoad, NativeLibraries::getFromClass returns
339 // a non-null Class object. When invoked from JNI_OnUnload,
340 // it will return null to indicate no context.
341 oop mirror = result.get_oop();
342 if (mirror != nullptr) {
343 Klass* fromClass = java_lang_Class::as_Klass(mirror);
344 loader = Handle(THREAD, fromClass->class_loader());
345 }
346 } else {
347 loader = Handle(THREAD, k->class_loader());
348 }
349 }
350
351 result = find_class_from_class_loader(env, class_name, true, loader, true, thread);
352
353 if (log_is_enabled(Debug, class, resolve) && result != nullptr) {
354 trace_class_resolution(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(result)));
355 }
356
357 return result;
358 JNI_END
359
360 DT_RETURN_MARK_DECL(FromReflectedMethod, jmethodID
361 , HOTSPOT_JNI_FROMREFLECTEDMETHOD_RETURN((uintptr_t)_ret_ref));
362
363 JNI_ENTRY(jmethodID, jni_FromReflectedMethod(JNIEnv *env, jobject method))
364 HOTSPOT_JNI_FROMREFLECTEDMETHOD_ENTRY(env, method);
365
366 jmethodID ret = nullptr;
367 DT_RETURN_MARK(FromReflectedMethod, jmethodID, (const jmethodID&)ret);
368
369 // method is a handle to a java.lang.reflect.Method object
370 oop reflected = JNIHandles::resolve_non_null(method);
371 oop mirror = nullptr;
372 int slot = 0;
373
374 if (reflected->klass() == vmClasses::reflect_Constructor_klass()) {
375 mirror = java_lang_reflect_Constructor::clazz(reflected);
376 slot = java_lang_reflect_Constructor::slot(reflected);
377 } else {
378 assert(reflected->klass() == vmClasses::reflect_Method_klass(), "wrong type");
379 mirror = java_lang_reflect_Method::clazz(reflected);
380 slot = java_lang_reflect_Method::slot(reflected);
381 }
382 Klass* k1 = java_lang_Class::as_Klass(mirror);
383
384 // Make sure class is initialized before handing id's out to methods
385 k1->initialize(CHECK_NULL);
386 Method* m = InstanceKlass::cast(k1)->method_with_idnum(slot);
387 ret = m==nullptr? nullptr : m->jmethod_id(); // return null if reflected method deleted
388 return ret;
389 JNI_END
390
391 DT_RETURN_MARK_DECL(FromReflectedField, jfieldID
392 , HOTSPOT_JNI_FROMREFLECTEDFIELD_RETURN((uintptr_t)_ret_ref));
393
394 JNI_ENTRY(jfieldID, jni_FromReflectedField(JNIEnv *env, jobject field))
395 HOTSPOT_JNI_FROMREFLECTEDFIELD_ENTRY(env, field);
396
397 jfieldID ret = nullptr;
398 DT_RETURN_MARK(FromReflectedField, jfieldID, (const jfieldID&)ret);
399
400 // field is a handle to a java.lang.reflect.Field object
401 oop reflected = JNIHandles::resolve_non_null(field);
402 oop mirror = java_lang_reflect_Field::clazz(reflected);
403 Klass* k1 = java_lang_Class::as_Klass(mirror);
404 int slot = java_lang_reflect_Field::slot(reflected);
405 int modifiers = java_lang_reflect_Field::modifiers(reflected);
406
407 // Make sure class is initialized before handing id's out to fields
408 k1->initialize(CHECK_NULL);
409
410 // First check if this is a static field
411 if (modifiers & JVM_ACC_STATIC) {
412 int offset = InstanceKlass::cast(k1)->field_offset( slot );
413 JNIid* id = InstanceKlass::cast(k1)->jni_id_for(offset);
414 assert(id != nullptr, "corrupt Field object");
415 DEBUG_ONLY(id->set_is_static_field_id();)
416 // A jfieldID for a static field is a JNIid specifying the field holder and the offset within the Klass*
417 ret = jfieldIDWorkaround::to_static_jfieldID(id);
418 return ret;
419 }
420
421 // The slot is the index of the field description in the field-array
422 // The jfieldID is the offset of the field within the object
423 // It may also have hash bits for k, if VerifyJNIFields is turned on.
424 int offset = InstanceKlass::cast(k1)->field_offset( slot );
425 bool is_flat = InstanceKlass::cast(k1)->field_is_flat(slot);
426 assert(InstanceKlass::cast(k1)->contains_field_offset(offset), "stay within object");
427 ret = jfieldIDWorkaround::to_instance_jfieldID(k1, offset, is_flat);
428 return ret;
429 JNI_END
430
431
432 DT_RETURN_MARK_DECL(ToReflectedMethod, jobject
433 , HOTSPOT_JNI_TOREFLECTEDMETHOD_RETURN(_ret_ref));
434
435 JNI_ENTRY(jobject, jni_ToReflectedMethod(JNIEnv *env, jclass cls, jmethodID method_id, jboolean isStatic))
436 HOTSPOT_JNI_TOREFLECTEDMETHOD_ENTRY(env, cls, (uintptr_t) method_id, isStatic);
437
438 jobject ret = nullptr;
439 DT_RETURN_MARK(ToReflectedMethod, jobject, (const jobject&)ret);
440
441 methodHandle m (THREAD, Method::resolve_jmethod_id(method_id));
442 assert(m->is_static() == (isStatic != 0), "jni_ToReflectedMethod access flags doesn't match");
443 oop reflection_method;
444 if (m->is_object_constructor()) {
445 reflection_method = Reflection::new_constructor(m, CHECK_NULL);
446 } else {
447 // Note: Static initializers can theoretically be here, if JNI users manage
448 // to get their jmethodID. Record them as plain methods.
449 reflection_method = Reflection::new_method(m, false, CHECK_NULL);
450 }
451 ret = JNIHandles::make_local(THREAD, reflection_method);
452 return ret;
453 JNI_END
454
455 DT_RETURN_MARK_DECL(GetSuperclass, jclass
456 , HOTSPOT_JNI_GETSUPERCLASS_RETURN(_ret_ref));
457
458 JNI_ENTRY(jclass, jni_GetSuperclass(JNIEnv *env, jclass sub))
459 HOTSPOT_JNI_GETSUPERCLASS_ENTRY(env, sub);
460
461 jclass obj = nullptr;
462 DT_RETURN_MARK(GetSuperclass, jclass, (const jclass&)obj);
463
464 oop mirror = JNIHandles::resolve_non_null(sub);
465 // primitive classes return null
466 if (java_lang_Class::is_primitive(mirror)) return nullptr;
467
468 // Rules of Class.getSuperClass as implemented by KLass::java_super:
469 // arrays return Object
470 // interfaces return null
471 // proper classes return Klass::super()
472 Klass* k = java_lang_Class::as_Klass(mirror);
473 if (k->is_interface()) return nullptr;
474
475 // return mirror for superclass
476 Klass* super = k->java_super();
477 // super2 is the value computed by the compiler's getSuperClass intrinsic:
478 DEBUG_ONLY(Klass* super2 = ( k->is_array_klass()
479 ? vmClasses::Object_klass()
480 : k->super() ) );
481 assert(super == super2,
482 "java_super computation depends on interface, array, other super");
483 obj = (super == nullptr) ? nullptr : (jclass) JNIHandles::make_local(THREAD, super->java_mirror());
484 return obj;
485 JNI_END
486
487 JNI_ENTRY_NO_PRESERVE(jboolean, jni_IsAssignableFrom(JNIEnv *env, jclass sub, jclass super))
488 HOTSPOT_JNI_ISASSIGNABLEFROM_ENTRY(env, sub, super);
489
490 oop sub_mirror = JNIHandles::resolve_non_null(sub);
491 oop super_mirror = JNIHandles::resolve_non_null(super);
492 if (java_lang_Class::is_primitive(sub_mirror) ||
493 java_lang_Class::is_primitive(super_mirror)) {
494 jboolean ret = (sub_mirror == super_mirror);
495
496 HOTSPOT_JNI_ISASSIGNABLEFROM_RETURN(ret);
497 return ret;
498 }
499 Klass* sub_klass = java_lang_Class::as_Klass(sub_mirror);
500 Klass* super_klass = java_lang_Class::as_Klass(super_mirror);
501 assert(sub_klass != nullptr && super_klass != nullptr, "invalid arguments to jni_IsAssignableFrom");
502 jboolean ret = sub_klass->is_subtype_of(super_klass) ?
503 JNI_TRUE : JNI_FALSE;
504
505 HOTSPOT_JNI_ISASSIGNABLEFROM_RETURN(ret);
506 return ret;
507 JNI_END
508
509
510 DT_RETURN_MARK_DECL(Throw, jint
511 , HOTSPOT_JNI_THROW_RETURN(_ret_ref));
512
513 JNI_ENTRY(jint, jni_Throw(JNIEnv *env, jthrowable obj))
514 HOTSPOT_JNI_THROW_ENTRY(env, obj);
515
516 jint ret = JNI_OK;
517 DT_RETURN_MARK(Throw, jint, (const jint&)ret);
518
519 THROW_OOP_(JNIHandles::resolve(obj), JNI_OK);
520 ShouldNotReachHere();
521 return 0; // Mute compiler.
522 JNI_END
523
524
525 DT_RETURN_MARK_DECL(ThrowNew, jint
526 , HOTSPOT_JNI_THROWNEW_RETURN(_ret_ref));
527
528 JNI_ENTRY(jint, jni_ThrowNew(JNIEnv *env, jclass clazz, const char *message))
529 HOTSPOT_JNI_THROWNEW_ENTRY(env, clazz, (char *) message);
530
531 jint ret = JNI_OK;
532 DT_RETURN_MARK(ThrowNew, jint, (const jint&)ret);
533
534 InstanceKlass* k = java_lang_Class::as_InstanceKlass(JNIHandles::resolve_non_null(clazz));
535 Symbol* name = k->name();
536 Handle class_loader (THREAD, k->class_loader());
537 THROW_MSG_LOADER_(name, (char *)message, class_loader, JNI_OK);
538 ShouldNotReachHere();
539 return 0; // Mute compiler.
540 JNI_END
541
542
543 // JNI functions only transform a pending async exception to a synchronous
544 // exception in ExceptionOccurred and ExceptionCheck calls, since
545 // delivering an async exception in other places won't change the native
546 // code's control flow and would be harmful when native code further calls
547 // JNI functions with a pending exception. Async exception is also checked
548 // during the call, so ExceptionOccurred/ExceptionCheck won't return
549 // false but deliver the async exception at the very end during
550 // state transition.
551
552 static void jni_check_async_exceptions(JavaThread *thread) {
553 assert(thread == Thread::current(), "must be itself");
554 if (thread->has_async_exception_condition()) {
555 SafepointMechanism::process_if_requested_with_exit_check(thread, true /* check asyncs */);
556 }
557 }
558
559 JNI_ENTRY_NO_PRESERVE(jthrowable, jni_ExceptionOccurred(JNIEnv *env))
560 HOTSPOT_JNI_EXCEPTIONOCCURRED_ENTRY(env);
561
562 jni_check_async_exceptions(thread);
563 oop exception = thread->pending_exception();
564 jthrowable ret = (jthrowable) JNIHandles::make_local(THREAD, exception);
565
566 HOTSPOT_JNI_EXCEPTIONOCCURRED_RETURN(ret);
567 return ret;
568 JNI_END
569
570
571 JNI_ENTRY_NO_PRESERVE(void, jni_ExceptionDescribe(JNIEnv *env))
572 HOTSPOT_JNI_EXCEPTIONDESCRIBE_ENTRY(env);
573
574 if (thread->has_pending_exception()) {
575 Handle ex(thread, thread->pending_exception());
576 thread->clear_pending_exception();
577 jio_fprintf(defaultStream::error_stream(), "Exception ");
578 if (thread != nullptr && thread->threadObj() != nullptr) {
579 ResourceMark rm(THREAD);
580 jio_fprintf(defaultStream::error_stream(),
581 "in thread \"%s\" ", thread->name());
582 }
583 if (ex->is_a(vmClasses::Throwable_klass())) {
584 JavaValue result(T_VOID);
585 JavaCalls::call_virtual(&result,
586 ex,
587 vmClasses::Throwable_klass(),
588 vmSymbols::printStackTrace_name(),
589 vmSymbols::void_method_signature(),
590 THREAD);
591 // If an exception is thrown in the call it gets thrown away. Not much
592 // we can do with it. The native code that calls this, does not check
593 // for the exception - hence, it might still be in the thread when DestroyVM gets
594 // called, potentially causing a few asserts to trigger - since no pending exception
595 // is expected.
596 CLEAR_PENDING_EXCEPTION;
597 } else {
598 ResourceMark rm(THREAD);
599 jio_fprintf(defaultStream::error_stream(),
600 ". Uncaught exception of type %s.",
601 ex->klass()->external_name());
602 }
603 }
604
605 HOTSPOT_JNI_EXCEPTIONDESCRIBE_RETURN();
606 JNI_END
607
608
609 JNI_ENTRY_NO_PRESERVE(void, jni_ExceptionClear(JNIEnv *env))
610 HOTSPOT_JNI_EXCEPTIONCLEAR_ENTRY(env);
611
612 // The jni code might be using this API to clear java thrown exception.
613 // So just mark jvmti thread exception state as exception caught.
614 JvmtiThreadState *state = JavaThread::current()->jvmti_thread_state();
615 if (state != nullptr && state->is_exception_detected()) {
616 state->set_exception_caught();
617 }
618 thread->clear_pending_exception();
619
620 HOTSPOT_JNI_EXCEPTIONCLEAR_RETURN();
621 JNI_END
622
623
624 JNI_ENTRY(void, jni_FatalError(JNIEnv *env, const char *msg))
625 HOTSPOT_JNI_FATALERROR_ENTRY(env, (char *) msg);
626
627 tty->print_cr("FATAL ERROR in native method: %s", msg);
628 thread->print_jni_stack();
629 os::abort(); // Dump core and abort
630 JNI_END
631
632
633 JNI_ENTRY(jint, jni_PushLocalFrame(JNIEnv *env, jint capacity))
634 HOTSPOT_JNI_PUSHLOCALFRAME_ENTRY(env, capacity);
635
636 //%note jni_11
637 if (capacity < 0 ||
638 ((MaxJNILocalCapacity > 0) && (capacity > MaxJNILocalCapacity))) {
639 HOTSPOT_JNI_PUSHLOCALFRAME_RETURN((uint32_t)JNI_ERR);
640 return JNI_ERR;
641 }
642
643 thread->push_jni_handle_block();
644 jint ret = JNI_OK;
645 HOTSPOT_JNI_PUSHLOCALFRAME_RETURN(ret);
646 return ret;
647 JNI_END
648
649
650 JNI_ENTRY(jobject, jni_PopLocalFrame(JNIEnv *env, jobject result))
651 HOTSPOT_JNI_POPLOCALFRAME_ENTRY(env, result);
652
653 //%note jni_11
654 Handle result_handle(thread, JNIHandles::resolve(result));
655 JNIHandleBlock* old_handles = thread->active_handles();
656 JNIHandleBlock* new_handles = old_handles->pop_frame_link();
657 if (new_handles != nullptr) {
658 // As a sanity check we only release the handle blocks if the pop_frame_link is not null.
659 // This way code will still work if PopLocalFrame is called without a corresponding
660 // PushLocalFrame call. Note that we set the pop_frame_link to null explicitly, otherwise
661 // the release_block call will release the blocks.
662 thread->set_active_handles(new_handles);
663 old_handles->set_pop_frame_link(nullptr); // clear link we won't release new_handles below
664 JNIHandleBlock::release_block(old_handles, thread); // may block
665 result = JNIHandles::make_local(thread, result_handle());
666 }
667 HOTSPOT_JNI_POPLOCALFRAME_RETURN(result);
668 return result;
669 JNI_END
670
671
672 JNI_ENTRY(jobject, jni_NewGlobalRef(JNIEnv *env, jobject ref))
673 HOTSPOT_JNI_NEWGLOBALREF_ENTRY(env, ref);
674
675 Handle ref_handle(thread, JNIHandles::resolve(ref));
676 jobject ret = JNIHandles::make_global(ref_handle, AllocFailStrategy::RETURN_NULL);
677
678 HOTSPOT_JNI_NEWGLOBALREF_RETURN(ret);
679 return ret;
680 JNI_END
681
682 // Must be JNI_ENTRY (with HandleMark)
683 JNI_ENTRY_NO_PRESERVE(void, jni_DeleteGlobalRef(JNIEnv *env, jobject ref))
684 HOTSPOT_JNI_DELETEGLOBALREF_ENTRY(env, ref);
685
686 JNIHandles::destroy_global(ref);
687
688 HOTSPOT_JNI_DELETEGLOBALREF_RETURN();
689 JNI_END
690
691 JNI_ENTRY_NO_PRESERVE(void, jni_DeleteLocalRef(JNIEnv *env, jobject obj))
692 HOTSPOT_JNI_DELETELOCALREF_ENTRY(env, obj);
693
694 JNIHandles::destroy_local(obj);
695
696 HOTSPOT_JNI_DELETELOCALREF_RETURN();
697 JNI_END
698
699 JNI_ENTRY_NO_PRESERVE(jboolean, jni_IsSameObject(JNIEnv *env, jobject r1, jobject r2))
700 HOTSPOT_JNI_ISSAMEOBJECT_ENTRY(env, r1, r2);
701
702 jboolean ret = JNIHandles::is_same_object(r1, r2) ? JNI_TRUE : JNI_FALSE;
703
704 HOTSPOT_JNI_ISSAMEOBJECT_RETURN(ret);
705 return ret;
706 JNI_END
707
708
709 JNI_ENTRY(jobject, jni_NewLocalRef(JNIEnv *env, jobject ref))
710 HOTSPOT_JNI_NEWLOCALREF_ENTRY(env, ref);
711
712 jobject ret = JNIHandles::make_local(THREAD, JNIHandles::resolve(ref),
713 AllocFailStrategy::RETURN_NULL);
714
715 HOTSPOT_JNI_NEWLOCALREF_RETURN(ret);
716 return ret;
717 JNI_END
718
719 JNI_LEAF(jint, jni_EnsureLocalCapacity(JNIEnv *env, jint capacity))
720 HOTSPOT_JNI_ENSURELOCALCAPACITY_ENTRY(env, capacity);
721
722 jint ret;
723 if (capacity >= 0 &&
724 ((MaxJNILocalCapacity <= 0) || (capacity <= MaxJNILocalCapacity))) {
725 ret = JNI_OK;
726 } else {
727 ret = JNI_ERR;
728 }
729
730 HOTSPOT_JNI_ENSURELOCALCAPACITY_RETURN(ret);
731 return ret;
732 JNI_END
733
734 // Return the Handle Type
735 JNI_LEAF(jobjectRefType, jni_GetObjectRefType(JNIEnv *env, jobject obj))
736 HOTSPOT_JNI_GETOBJECTREFTYPE_ENTRY(env, obj);
737
738 jobjectRefType ret = JNIInvalidRefType;
739 if (obj != nullptr) {
740 ret = JNIHandles::handle_type(thread, obj);
741 }
742
743 HOTSPOT_JNI_GETOBJECTREFTYPE_RETURN((void *) ret);
744 return ret;
745 JNI_END
746
747
748 class JNI_ArgumentPusher : public SignatureIterator {
749 protected:
750 JavaCallArguments* _arguments;
751
752 void push_int(jint x) { _arguments->push_int(x); }
753 void push_long(jlong x) { _arguments->push_long(x); }
754 void push_float(jfloat x) { _arguments->push_float(x); }
755 void push_double(jdouble x) { _arguments->push_double(x); }
756 void push_object(jobject x) { _arguments->push_jobject(x); }
757
758 void push_boolean(jboolean b) {
759 // Normalize boolean arguments from native code by converting 1-255 to JNI_TRUE and
760 // 0 to JNI_FALSE. Boolean return values from native are normalized the same in
761 // TemplateInterpreterGenerator::generate_result_handler_for and
762 // SharedRuntime::generate_native_wrapper.
763 push_int(b == 0 ? JNI_FALSE : JNI_TRUE);
764 }
765
766 JNI_ArgumentPusher(Method* method)
767 : SignatureIterator(method->signature(),
768 Fingerprinter(methodHandle(Thread::current(), method)).fingerprint())
769 {
770 _arguments = nullptr;
771 }
772
773 public:
774 virtual void push_arguments_on(JavaCallArguments* arguments) = 0;
775 };
776
777
778 class JNI_ArgumentPusherVaArg : public JNI_ArgumentPusher {
779 va_list _ap;
780
781 void set_ap(va_list rap) {
782 va_copy(_ap, rap);
783 }
784
785 friend class SignatureIterator; // so do_parameters_on can call do_type
786 void do_type(BasicType type) {
787 switch (type) {
788 // these are coerced to int when using va_arg
789 case T_BYTE:
790 case T_CHAR:
791 case T_SHORT:
792 case T_INT: push_int(va_arg(_ap, jint)); break;
793 case T_BOOLEAN: push_boolean((jboolean) va_arg(_ap, jint)); break;
794
795 // each of these paths is exercised by the various jck Call[Static,Nonvirtual,][Void,Int,..]Method[A,V,] tests
796
797 case T_LONG: push_long(va_arg(_ap, jlong)); break;
798 // float is coerced to double w/ va_arg
799 case T_FLOAT: push_float((jfloat) va_arg(_ap, jdouble)); break;
800 case T_DOUBLE: push_double(va_arg(_ap, jdouble)); break;
801
802 case T_ARRAY:
803 case T_OBJECT: push_object(va_arg(_ap, jobject)); break;
804 default: ShouldNotReachHere();
805 }
806 }
807
808 public:
809 JNI_ArgumentPusherVaArg(jmethodID method_id, va_list rap)
810 : JNI_ArgumentPusher(Method::resolve_jmethod_id(method_id)) {
811 set_ap(rap);
812 }
813
814 ~JNI_ArgumentPusherVaArg() {
815 va_end(_ap);
816 }
817
818 virtual void push_arguments_on(JavaCallArguments* arguments) {
819 _arguments = arguments;
820 do_parameters_on(this);
821 }
822 };
823
824
825 class JNI_ArgumentPusherArray : public JNI_ArgumentPusher {
826 protected:
827 const jvalue *_ap;
828
829 inline void set_ap(const jvalue *rap) { _ap = rap; }
830
831 friend class SignatureIterator; // so do_parameters_on can call do_type
832 void do_type(BasicType type) {
833 switch (type) {
834 case T_CHAR: push_int((_ap++)->c); break;
835 case T_SHORT: push_int((_ap++)->s); break;
836 case T_BYTE: push_int((_ap++)->b); break;
837 case T_INT: push_int((_ap++)->i); break;
838 case T_BOOLEAN: push_boolean((_ap++)->z); break;
839 case T_LONG: push_long((_ap++)->j); break;
840 case T_FLOAT: push_float((_ap++)->f); break;
841 case T_DOUBLE: push_double((_ap++)->d); break;
842 case T_ARRAY:
843 case T_OBJECT: push_object((_ap++)->l); break;
844 default: ShouldNotReachHere();
845 }
846 }
847
848 public:
849 JNI_ArgumentPusherArray(jmethodID method_id, const jvalue *rap)
850 : JNI_ArgumentPusher(Method::resolve_jmethod_id(method_id)) {
851 set_ap(rap);
852 }
853
854 virtual void push_arguments_on(JavaCallArguments* arguments) {
855 _arguments = arguments;
856 do_parameters_on(this);
857 }
858 };
859
860
861 enum JNICallType {
862 JNI_STATIC,
863 JNI_VIRTUAL,
864 JNI_NONVIRTUAL
865 };
866
867
868
869 static void jni_invoke_static(JNIEnv *env, JavaValue* result, jobject receiver, JNICallType call_type, jmethodID method_id, JNI_ArgumentPusher *args, TRAPS) {
870 methodHandle method(THREAD, Method::resolve_jmethod_id(method_id));
871
872 // Create object to hold arguments for the JavaCall, and associate it with
873 // the jni parser
874 ResourceMark rm(THREAD);
875 JavaCallArguments java_args(method->size_of_parameters());
876
877 assert(method->is_static(), "method should be static");
878
879 // Fill out JavaCallArguments object
880 args->push_arguments_on(&java_args);
881 // Initialize result type
882 result->set_type(args->return_type());
883
884 // Invoke the method. Result is returned as oop.
885 JavaCalls::call(result, method, &java_args, CHECK);
886
887 // Convert result
888 if (is_reference_type(result->get_type())) {
889 result->set_jobject(JNIHandles::make_local(THREAD, result->get_oop()));
890 }
891 }
892
893
894 static void jni_invoke_nonstatic(JNIEnv *env, JavaValue* result, jobject receiver, JNICallType call_type, jmethodID method_id, JNI_ArgumentPusher *args, TRAPS) {
895 oop recv = JNIHandles::resolve(receiver);
896 if (recv == nullptr) {
897 THROW(vmSymbols::java_lang_NullPointerException());
898 }
899 Handle h_recv(THREAD, recv);
900
901 int number_of_parameters;
902 Method* selected_method;
903 {
904 Method* m = Method::resolve_jmethod_id(method_id);
905 number_of_parameters = m->size_of_parameters();
906 InstanceKlass* holder = m->method_holder();
907 if (call_type != JNI_VIRTUAL) {
908 selected_method = m;
909 } else if (!m->has_itable_index()) {
910 // non-interface call -- for that little speed boost, don't handlize
911 DEBUG_ONLY(NoSafepointVerifier nosafepoint;)
912 // jni_GetMethodID makes sure class is linked and initialized
913 // so m should have a valid vtable index.
914 assert(m->valid_vtable_index(), "no valid vtable index");
915 int vtbl_index = m->vtable_index();
916 if (vtbl_index != Method::nonvirtual_vtable_index) {
917 selected_method = h_recv->klass()->method_at_vtable(vtbl_index);
918 } else {
919 // final method
920 selected_method = m;
921 }
922 } else {
923 // interface call
924 int itbl_index = m->itable_index();
925 Klass* k = h_recv->klass();
926 selected_method = InstanceKlass::cast(k)->method_at_itable(holder, itbl_index, CHECK);
927 }
928 }
929
930 if (selected_method->is_abstract()) {
931 ResourceMark rm(THREAD);
932 THROW_MSG(vmSymbols::java_lang_AbstractMethodError(), selected_method->name()->as_C_string());
933 }
934
935 methodHandle method(THREAD, selected_method);
936
937 // Create object to hold arguments for the JavaCall, and associate it with
938 // the jni parser
939 ResourceMark rm(THREAD);
940 JavaCallArguments java_args(number_of_parameters);
941
942 // handle arguments
943 assert(!method->is_static(), "method %s should not be static", method->name_and_sig_as_C_string());
944 java_args.push_oop(h_recv); // Push jobject handle
945
946 // Fill out JavaCallArguments object
947 args->push_arguments_on(&java_args);
948 // Initialize result type
949 result->set_type(args->return_type());
950
951 // Invoke the method. Result is returned as oop.
952 JavaCalls::call(result, method, &java_args, CHECK);
953
954 // Convert result
955 if (is_reference_type(result->get_type())) {
956 result->set_jobject(JNIHandles::make_local(THREAD, result->get_oop()));
957 }
958 }
959
960 DT_RETURN_MARK_DECL(AllocObject, jobject
961 , HOTSPOT_JNI_ALLOCOBJECT_RETURN(_ret_ref));
962
963 JNI_ENTRY(jobject, jni_AllocObject(JNIEnv *env, jclass clazz))
964 HOTSPOT_JNI_ALLOCOBJECT_ENTRY(env, clazz);
965
966 jobject ret = nullptr;
967 DT_RETURN_MARK(AllocObject, jobject, (const jobject&)ret);
968
969 instanceOop i = InstanceKlass::allocate_instance(JNIHandles::resolve_non_null(clazz), CHECK_NULL);
970 ret = JNIHandles::make_local(THREAD, i);
971 return ret;
972 JNI_END
973
974 DT_RETURN_MARK_DECL(NewObjectA, jobject
975 , HOTSPOT_JNI_NEWOBJECTA_RETURN(_ret_ref));
976
977 JNI_ENTRY(jobject, jni_NewObjectA(JNIEnv *env, jclass clazz, jmethodID methodID, const jvalue *args))
978 HOTSPOT_JNI_NEWOBJECTA_ENTRY(env, clazz, (uintptr_t) methodID);
979
980 jobject obj = nullptr;
981 DT_RETURN_MARK(NewObjectA, jobject, (const jobject&)obj);
982
983 instanceOop i = InstanceKlass::allocate_instance(JNIHandles::resolve_non_null(clazz), CHECK_NULL);
984 obj = JNIHandles::make_local(THREAD, i);
985 JavaValue jvalue(T_VOID);
986 JNI_ArgumentPusherArray ap(methodID, args);
987 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_NULL);
988 return obj;
989 JNI_END
990
991
992 DT_RETURN_MARK_DECL(NewObjectV, jobject
993 , HOTSPOT_JNI_NEWOBJECTV_RETURN(_ret_ref));
994
995 JNI_ENTRY(jobject, jni_NewObjectV(JNIEnv *env, jclass clazz, jmethodID methodID, va_list args))
996 HOTSPOT_JNI_NEWOBJECTV_ENTRY(env, clazz, (uintptr_t) methodID);
997
998 jobject obj = nullptr;
999 DT_RETURN_MARK(NewObjectV, jobject, (const jobject&)obj);
1000
1001 instanceOop i = InstanceKlass::allocate_instance(JNIHandles::resolve_non_null(clazz), CHECK_NULL);
1002 obj = JNIHandles::make_local(THREAD, i);
1003 JavaValue jvalue(T_VOID);
1004 JNI_ArgumentPusherVaArg ap(methodID, args);
1005 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_NULL);
1006 return obj;
1007 JNI_END
1008
1009
1010 DT_RETURN_MARK_DECL(NewObject, jobject
1011 , HOTSPOT_JNI_NEWOBJECT_RETURN(_ret_ref));
1012
1013 JNI_ENTRY(jobject, jni_NewObject(JNIEnv *env, jclass clazz, jmethodID methodID, ...))
1014 HOTSPOT_JNI_NEWOBJECT_ENTRY(env, clazz, (uintptr_t) methodID);
1015
1016 jobject obj = nullptr;
1017 DT_RETURN_MARK(NewObject, jobject, (const jobject&)obj);
1018
1019 instanceOop i = InstanceKlass::allocate_instance(JNIHandles::resolve_non_null(clazz), CHECK_NULL);
1020 obj = JNIHandles::make_local(THREAD, i);
1021 va_list args;
1022 va_start(args, methodID);
1023 JavaValue jvalue(T_VOID);
1024 JNI_ArgumentPusherVaArg ap(methodID, args);
1025 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_NULL);
1026 va_end(args);
1027 return obj;
1028 JNI_END
1029
1030
1031 JNI_ENTRY(jclass, jni_GetObjectClass(JNIEnv *env, jobject obj))
1032 HOTSPOT_JNI_GETOBJECTCLASS_ENTRY(env, obj);
1033
1034 Klass* k = JNIHandles::resolve_non_null(obj)->klass();
1035 jclass ret =
1036 (jclass) JNIHandles::make_local(THREAD, k->java_mirror());
1037
1038 HOTSPOT_JNI_GETOBJECTCLASS_RETURN(ret);
1039 return ret;
1040 JNI_END
1041
1042 JNI_ENTRY_NO_PRESERVE(jboolean, jni_IsInstanceOf(JNIEnv *env, jobject obj, jclass clazz))
1043 HOTSPOT_JNI_ISINSTANCEOF_ENTRY(env, obj, clazz);
1044
1045 jboolean ret = JNI_TRUE;
1046 if (obj != nullptr) {
1047 ret = JNI_FALSE;
1048 Klass* k = java_lang_Class::as_Klass(
1049 JNIHandles::resolve_non_null(clazz));
1050 if (k != nullptr) {
1051 ret = JNIHandles::resolve_non_null(obj)->is_a(k) ? JNI_TRUE : JNI_FALSE;
1052 }
1053 }
1054
1055 HOTSPOT_JNI_ISINSTANCEOF_RETURN(ret);
1056 return ret;
1057 JNI_END
1058
1059
1060 static jmethodID get_method_id(JNIEnv *env, jclass clazz, const char *name_str,
1061 const char *sig, bool is_static, TRAPS) {
1062 // %%%% This code should probably just call into a method in the LinkResolver
1063 //
1064 // The class should have been loaded (we have an instance of the class
1065 // passed in) so the method and signature should already be in the symbol
1066 // table. If they're not there, the method doesn't exist.
1067 const char *name_to_probe = (name_str == nullptr)
1068 ? vmSymbols::object_initializer_name()->as_C_string()
1069 : name_str;
1070 TempNewSymbol name = SymbolTable::probe(name_to_probe, (int)strlen(name_to_probe));
1071 TempNewSymbol signature = SymbolTable::probe(sig, (int)strlen(sig));
1072
1073 if (name == nullptr || signature == nullptr) {
1074 THROW_MSG_NULL(vmSymbols::java_lang_NoSuchMethodError(), name_str);
1075 }
1076
1077 oop mirror = JNIHandles::resolve_non_null(clazz);
1078 Klass* klass = java_lang_Class::as_Klass(mirror);
1079
1080 // Throw a NoSuchMethodError exception if we have an instance of a
1081 // primitive java.lang.Class
1082 if (java_lang_Class::is_primitive(mirror)) {
1083 ResourceMark rm(THREAD);
1084 THROW_MSG_NULL(vmSymbols::java_lang_NoSuchMethodError(), err_msg("%s%s.%s%s", is_static ? "static " : "", klass->signature_name(), name_str, sig));
1085 }
1086
1087 // Make sure class is linked and initialized before handing id's out to
1088 // Method*s.
1089 klass->initialize(CHECK_NULL);
1090
1091 Method* m;
1092 if (name == vmSymbols::object_initializer_name() ||
1093 name == vmSymbols::class_initializer_name()) {
1094 // Never search superclasses for constructors
1095 if (klass->is_instance_klass()) {
1096 m = InstanceKlass::cast(klass)->find_method(name, signature);
1097 } else {
1098 m = nullptr;
1099 }
1100 } else {
1101 m = klass->lookup_method(name, signature);
1102 if (m == nullptr && klass->is_instance_klass()) {
1103 m = InstanceKlass::cast(klass)->lookup_method_in_ordered_interfaces(name, signature);
1104 }
1105 }
1106 if (m == nullptr || (m->is_static() != is_static)) {
1107 ResourceMark rm(THREAD);
1108 THROW_MSG_NULL(vmSymbols::java_lang_NoSuchMethodError(), err_msg("%s%s.%s%s", is_static ? "static " : "", klass->signature_name(), name_str, sig));
1109 }
1110 return m->jmethod_id();
1111 }
1112
1113
1114 JNI_ENTRY(jmethodID, jni_GetMethodID(JNIEnv *env, jclass clazz,
1115 const char *name, const char *sig))
1116 HOTSPOT_JNI_GETMETHODID_ENTRY(env, clazz, (char *) name, (char *) sig);
1117 jmethodID ret = get_method_id(env, clazz, name, sig, false, thread);
1118 HOTSPOT_JNI_GETMETHODID_RETURN((uintptr_t) ret);
1119 return ret;
1120 JNI_END
1121
1122
1123 JNI_ENTRY(jmethodID, jni_GetStaticMethodID(JNIEnv *env, jclass clazz,
1124 const char *name, const char *sig))
1125 HOTSPOT_JNI_GETSTATICMETHODID_ENTRY(env, (char *) clazz, (char *) name, (char *)sig);
1126 jmethodID ret = get_method_id(env, clazz, name, sig, true, thread);
1127 HOTSPOT_JNI_GETSTATICMETHODID_RETURN((uintptr_t) ret);
1128 return ret;
1129 JNI_END
1130
1131
1132
1133 //
1134 // Calling Methods
1135 //
1136
1137
1138 #define DEFINE_CALLMETHOD(ResultType, Result, Tag \
1139 , EntryProbe, ReturnProbe) \
1140 \
1141 DT_RETURN_MARK_DECL_FOR(Result, Call##Result##Method, ResultType \
1142 , ReturnProbe); \
1143 \
1144 JNI_ENTRY(ResultType, \
1145 jni_Call##Result##Method(JNIEnv *env, jobject obj, jmethodID methodID, ...)) \
1146 \
1147 EntryProbe; \
1148 ResultType ret{}; \
1149 DT_RETURN_MARK_FOR(Result, Call##Result##Method, ResultType, \
1150 (const ResultType&)ret);\
1151 \
1152 va_list args; \
1153 va_start(args, methodID); \
1154 JavaValue jvalue(Tag); \
1155 JNI_ArgumentPusherVaArg ap(methodID, args); \
1156 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK_(ResultType{})); \
1157 va_end(args); \
1158 ret = jvalue.get_##ResultType(); \
1159 return ret;\
1160 JNI_END
1161
1162 // the runtime type of subword integral basic types is integer
1163 DEFINE_CALLMETHOD(jboolean, Boolean, T_BOOLEAN
1164 , HOTSPOT_JNI_CALLBOOLEANMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1165 HOTSPOT_JNI_CALLBOOLEANMETHOD_RETURN(_ret_ref))
1166 DEFINE_CALLMETHOD(jbyte, Byte, T_BYTE
1167 , HOTSPOT_JNI_CALLBYTEMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1168 HOTSPOT_JNI_CALLBYTEMETHOD_RETURN(_ret_ref))
1169 DEFINE_CALLMETHOD(jchar, Char, T_CHAR
1170 , HOTSPOT_JNI_CALLCHARMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1171 HOTSPOT_JNI_CALLCHARMETHOD_RETURN(_ret_ref))
1172 DEFINE_CALLMETHOD(jshort, Short, T_SHORT
1173 , HOTSPOT_JNI_CALLSHORTMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1174 HOTSPOT_JNI_CALLSHORTMETHOD_RETURN(_ret_ref))
1175
1176 DEFINE_CALLMETHOD(jobject, Object, T_OBJECT
1177 , HOTSPOT_JNI_CALLOBJECTMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1178 HOTSPOT_JNI_CALLOBJECTMETHOD_RETURN(_ret_ref))
1179 DEFINE_CALLMETHOD(jint, Int, T_INT,
1180 HOTSPOT_JNI_CALLINTMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1181 HOTSPOT_JNI_CALLINTMETHOD_RETURN(_ret_ref))
1182 DEFINE_CALLMETHOD(jlong, Long, T_LONG
1183 , HOTSPOT_JNI_CALLLONGMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1184 HOTSPOT_JNI_CALLLONGMETHOD_RETURN(_ret_ref))
1185 // Float and double probes don't return value because dtrace doesn't currently support it
1186 DEFINE_CALLMETHOD(jfloat, Float, T_FLOAT
1187 , HOTSPOT_JNI_CALLFLOATMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1188 HOTSPOT_JNI_CALLFLOATMETHOD_RETURN())
1189 DEFINE_CALLMETHOD(jdouble, Double, T_DOUBLE
1190 , HOTSPOT_JNI_CALLDOUBLEMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1191 HOTSPOT_JNI_CALLDOUBLEMETHOD_RETURN())
1192
1193 #define DEFINE_CALLMETHODV(ResultType, Result, Tag \
1194 , EntryProbe, ReturnProbe) \
1195 \
1196 DT_RETURN_MARK_DECL_FOR(Result, Call##Result##MethodV, ResultType \
1197 , ReturnProbe); \
1198 \
1199 JNI_ENTRY(ResultType, \
1200 jni_Call##Result##MethodV(JNIEnv *env, jobject obj, jmethodID methodID, va_list args)) \
1201 \
1202 EntryProbe;\
1203 ResultType ret{}; \
1204 DT_RETURN_MARK_FOR(Result, Call##Result##MethodV, ResultType, \
1205 (const ResultType&)ret);\
1206 \
1207 JavaValue jvalue(Tag); \
1208 JNI_ArgumentPusherVaArg ap(methodID, args); \
1209 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK_(ResultType{})); \
1210 ret = jvalue.get_##ResultType(); \
1211 return ret;\
1212 JNI_END
1213
1214 // the runtime type of subword integral basic types is integer
1215 DEFINE_CALLMETHODV(jboolean, Boolean, T_BOOLEAN
1216 , HOTSPOT_JNI_CALLBOOLEANMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1217 HOTSPOT_JNI_CALLBOOLEANMETHODV_RETURN(_ret_ref))
1218 DEFINE_CALLMETHODV(jbyte, Byte, T_BYTE
1219 , HOTSPOT_JNI_CALLBYTEMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1220 HOTSPOT_JNI_CALLBYTEMETHODV_RETURN(_ret_ref))
1221 DEFINE_CALLMETHODV(jchar, Char, T_CHAR
1222 , HOTSPOT_JNI_CALLCHARMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1223 HOTSPOT_JNI_CALLCHARMETHODV_RETURN(_ret_ref))
1224 DEFINE_CALLMETHODV(jshort, Short, T_SHORT
1225 , HOTSPOT_JNI_CALLSHORTMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1226 HOTSPOT_JNI_CALLSHORTMETHODV_RETURN(_ret_ref))
1227
1228 DEFINE_CALLMETHODV(jobject, Object, T_OBJECT
1229 , HOTSPOT_JNI_CALLOBJECTMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1230 HOTSPOT_JNI_CALLOBJECTMETHODV_RETURN(_ret_ref))
1231 DEFINE_CALLMETHODV(jint, Int, T_INT,
1232 HOTSPOT_JNI_CALLINTMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1233 HOTSPOT_JNI_CALLINTMETHODV_RETURN(_ret_ref))
1234 DEFINE_CALLMETHODV(jlong, Long, T_LONG
1235 , HOTSPOT_JNI_CALLLONGMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1236 HOTSPOT_JNI_CALLLONGMETHODV_RETURN(_ret_ref))
1237 // Float and double probes don't return value because dtrace doesn't currently support it
1238 DEFINE_CALLMETHODV(jfloat, Float, T_FLOAT
1239 , HOTSPOT_JNI_CALLFLOATMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1240 HOTSPOT_JNI_CALLFLOATMETHODV_RETURN())
1241 DEFINE_CALLMETHODV(jdouble, Double, T_DOUBLE
1242 , HOTSPOT_JNI_CALLDOUBLEMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1243 HOTSPOT_JNI_CALLDOUBLEMETHODV_RETURN())
1244
1245 #define DEFINE_CALLMETHODA(ResultType, Result, Tag \
1246 , EntryProbe, ReturnProbe) \
1247 \
1248 DT_RETURN_MARK_DECL_FOR(Result, Call##Result##MethodA, ResultType \
1249 , ReturnProbe); \
1250 \
1251 JNI_ENTRY(ResultType, \
1252 jni_Call##Result##MethodA(JNIEnv *env, jobject obj, jmethodID methodID, const jvalue *args)) \
1253 EntryProbe; \
1254 ResultType ret{}; \
1255 DT_RETURN_MARK_FOR(Result, Call##Result##MethodA, ResultType, \
1256 (const ResultType&)ret);\
1257 \
1258 JavaValue jvalue(Tag); \
1259 JNI_ArgumentPusherArray ap(methodID, args); \
1260 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK_(ResultType{})); \
1261 ret = jvalue.get_##ResultType(); \
1262 return ret;\
1263 JNI_END
1264
1265 // the runtime type of subword integral basic types is integer
1266 DEFINE_CALLMETHODA(jboolean, Boolean, T_BOOLEAN
1267 , HOTSPOT_JNI_CALLBOOLEANMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1268 HOTSPOT_JNI_CALLBOOLEANMETHODA_RETURN(_ret_ref))
1269 DEFINE_CALLMETHODA(jbyte, Byte, T_BYTE
1270 , HOTSPOT_JNI_CALLBYTEMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1271 HOTSPOT_JNI_CALLBYTEMETHODA_RETURN(_ret_ref))
1272 DEFINE_CALLMETHODA(jchar, Char, T_CHAR
1273 , HOTSPOT_JNI_CALLCHARMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1274 HOTSPOT_JNI_CALLCHARMETHODA_RETURN(_ret_ref))
1275 DEFINE_CALLMETHODA(jshort, Short, T_SHORT
1276 , HOTSPOT_JNI_CALLSHORTMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1277 HOTSPOT_JNI_CALLSHORTMETHODA_RETURN(_ret_ref))
1278
1279 DEFINE_CALLMETHODA(jobject, Object, T_OBJECT
1280 , HOTSPOT_JNI_CALLOBJECTMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1281 HOTSPOT_JNI_CALLOBJECTMETHODA_RETURN(_ret_ref))
1282 DEFINE_CALLMETHODA(jint, Int, T_INT,
1283 HOTSPOT_JNI_CALLINTMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1284 HOTSPOT_JNI_CALLINTMETHODA_RETURN(_ret_ref))
1285 DEFINE_CALLMETHODA(jlong, Long, T_LONG
1286 , HOTSPOT_JNI_CALLLONGMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1287 HOTSPOT_JNI_CALLLONGMETHODA_RETURN(_ret_ref))
1288 // Float and double probes don't return value because dtrace doesn't currently support it
1289 DEFINE_CALLMETHODA(jfloat, Float, T_FLOAT
1290 , HOTSPOT_JNI_CALLFLOATMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1291 HOTSPOT_JNI_CALLFLOATMETHODA_RETURN())
1292 DEFINE_CALLMETHODA(jdouble, Double, T_DOUBLE
1293 , HOTSPOT_JNI_CALLDOUBLEMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1294 HOTSPOT_JNI_CALLDOUBLEMETHODA_RETURN())
1295
1296 DT_VOID_RETURN_MARK_DECL(CallVoidMethod, HOTSPOT_JNI_CALLVOIDMETHOD_RETURN());
1297 DT_VOID_RETURN_MARK_DECL(CallVoidMethodV, HOTSPOT_JNI_CALLVOIDMETHODV_RETURN());
1298 DT_VOID_RETURN_MARK_DECL(CallVoidMethodA, HOTSPOT_JNI_CALLVOIDMETHODA_RETURN());
1299
1300
1301 JNI_ENTRY(void, jni_CallVoidMethod(JNIEnv *env, jobject obj, jmethodID methodID, ...))
1302 HOTSPOT_JNI_CALLVOIDMETHOD_ENTRY(env, obj, (uintptr_t) methodID);
1303 DT_VOID_RETURN_MARK(CallVoidMethod);
1304
1305 va_list args;
1306 va_start(args, methodID);
1307 JavaValue jvalue(T_VOID);
1308 JNI_ArgumentPusherVaArg ap(methodID, args);
1309 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK);
1310 va_end(args);
1311 JNI_END
1312
1313
1314 JNI_ENTRY(void, jni_CallVoidMethodV(JNIEnv *env, jobject obj, jmethodID methodID, va_list args))
1315 HOTSPOT_JNI_CALLVOIDMETHODV_ENTRY(env, obj, (uintptr_t) methodID);
1316 DT_VOID_RETURN_MARK(CallVoidMethodV);
1317
1318 JavaValue jvalue(T_VOID);
1319 JNI_ArgumentPusherVaArg ap(methodID, args);
1320 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK);
1321 JNI_END
1322
1323
1324 JNI_ENTRY(void, jni_CallVoidMethodA(JNIEnv *env, jobject obj, jmethodID methodID, const jvalue *args))
1325 HOTSPOT_JNI_CALLVOIDMETHODA_ENTRY(env, obj, (uintptr_t) methodID);
1326 DT_VOID_RETURN_MARK(CallVoidMethodA);
1327
1328 JavaValue jvalue(T_VOID);
1329 JNI_ArgumentPusherArray ap(methodID, args);
1330 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK);
1331 JNI_END
1332
1333
1334
1335 #define DEFINE_CALLNONVIRTUALMETHOD(ResultType, Result, Tag \
1336 , EntryProbe, ReturnProbe) \
1337 \
1338 DT_RETURN_MARK_DECL_FOR(Result, CallNonvirtual##Result##Method, ResultType \
1339 , ReturnProbe);\
1340 \
1341 JNI_ENTRY(ResultType, \
1342 jni_CallNonvirtual##Result##Method(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, ...)) \
1343 \
1344 EntryProbe;\
1345 ResultType ret;\
1346 DT_RETURN_MARK_FOR(Result, CallNonvirtual##Result##Method, ResultType, \
1347 (const ResultType&)ret);\
1348 \
1349 va_list args; \
1350 va_start(args, methodID); \
1351 JavaValue jvalue(Tag); \
1352 JNI_ArgumentPusherVaArg ap(methodID, args); \
1353 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_(ResultType{})); \
1354 va_end(args); \
1355 ret = jvalue.get_##ResultType(); \
1356 return ret;\
1357 JNI_END
1358
1359 // the runtime type of subword integral basic types is integer
1360 DEFINE_CALLNONVIRTUALMETHOD(jboolean, Boolean, T_BOOLEAN
1361 , HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1362 HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHOD_RETURN(_ret_ref))
1363 DEFINE_CALLNONVIRTUALMETHOD(jbyte, Byte, T_BYTE
1364 , HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1365 HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHOD_RETURN(_ret_ref))
1366 DEFINE_CALLNONVIRTUALMETHOD(jchar, Char, T_CHAR
1367 , HOTSPOT_JNI_CALLNONVIRTUALCHARMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1368 HOTSPOT_JNI_CALLNONVIRTUALCHARMETHOD_RETURN(_ret_ref))
1369 DEFINE_CALLNONVIRTUALMETHOD(jshort, Short, T_SHORT
1370 , HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1371 HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHOD_RETURN(_ret_ref))
1372
1373 DEFINE_CALLNONVIRTUALMETHOD(jobject, Object, T_OBJECT
1374 , HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1375 HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHOD_RETURN(_ret_ref))
1376 DEFINE_CALLNONVIRTUALMETHOD(jint, Int, T_INT
1377 , HOTSPOT_JNI_CALLNONVIRTUALINTMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1378 HOTSPOT_JNI_CALLNONVIRTUALINTMETHOD_RETURN(_ret_ref))
1379 DEFINE_CALLNONVIRTUALMETHOD(jlong, Long, T_LONG
1380 , HOTSPOT_JNI_CALLNONVIRTUALLONGMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1381 // Float and double probes don't return value because dtrace doesn't currently support it
1382 HOTSPOT_JNI_CALLNONVIRTUALLONGMETHOD_RETURN(_ret_ref))
1383 DEFINE_CALLNONVIRTUALMETHOD(jfloat, Float, T_FLOAT
1384 , HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1385 HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHOD_RETURN())
1386 DEFINE_CALLNONVIRTUALMETHOD(jdouble, Double, T_DOUBLE
1387 , HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1388 HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHOD_RETURN())
1389
1390 #define DEFINE_CALLNONVIRTUALMETHODV(ResultType, Result, Tag \
1391 , EntryProbe, ReturnProbe) \
1392 \
1393 DT_RETURN_MARK_DECL_FOR(Result, CallNonvirtual##Result##MethodV, ResultType \
1394 , ReturnProbe);\
1395 \
1396 JNI_ENTRY(ResultType, \
1397 jni_CallNonvirtual##Result##MethodV(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, va_list args)) \
1398 \
1399 EntryProbe;\
1400 ResultType ret;\
1401 DT_RETURN_MARK_FOR(Result, CallNonvirtual##Result##MethodV, ResultType, \
1402 (const ResultType&)ret);\
1403 \
1404 JavaValue jvalue(Tag); \
1405 JNI_ArgumentPusherVaArg ap(methodID, args); \
1406 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_(ResultType{})); \
1407 ret = jvalue.get_##ResultType(); \
1408 return ret;\
1409 JNI_END
1410
1411 // the runtime type of subword integral basic types is integer
1412 DEFINE_CALLNONVIRTUALMETHODV(jboolean, Boolean, T_BOOLEAN
1413 , HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1414 HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHODV_RETURN(_ret_ref))
1415 DEFINE_CALLNONVIRTUALMETHODV(jbyte, Byte, T_BYTE
1416 , HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1417 HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHODV_RETURN(_ret_ref))
1418 DEFINE_CALLNONVIRTUALMETHODV(jchar, Char, T_CHAR
1419 , HOTSPOT_JNI_CALLNONVIRTUALCHARMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1420 HOTSPOT_JNI_CALLNONVIRTUALCHARMETHODV_RETURN(_ret_ref))
1421 DEFINE_CALLNONVIRTUALMETHODV(jshort, Short, T_SHORT
1422 , HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1423 HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHODV_RETURN(_ret_ref))
1424
1425 DEFINE_CALLNONVIRTUALMETHODV(jobject, Object, T_OBJECT
1426 , HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1427 HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHODV_RETURN(_ret_ref))
1428 DEFINE_CALLNONVIRTUALMETHODV(jint, Int, T_INT
1429 , HOTSPOT_JNI_CALLNONVIRTUALINTMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1430 HOTSPOT_JNI_CALLNONVIRTUALINTMETHODV_RETURN(_ret_ref))
1431 DEFINE_CALLNONVIRTUALMETHODV(jlong, Long, T_LONG
1432 , HOTSPOT_JNI_CALLNONVIRTUALLONGMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1433 // Float and double probes don't return value because dtrace doesn't currently support it
1434 HOTSPOT_JNI_CALLNONVIRTUALLONGMETHODV_RETURN(_ret_ref))
1435 DEFINE_CALLNONVIRTUALMETHODV(jfloat, Float, T_FLOAT
1436 , HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1437 HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHODV_RETURN())
1438 DEFINE_CALLNONVIRTUALMETHODV(jdouble, Double, T_DOUBLE
1439 , HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1440 HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHODV_RETURN())
1441
1442 #define DEFINE_CALLNONVIRTUALMETHODA(ResultType, Result, Tag \
1443 , EntryProbe, ReturnProbe) \
1444 \
1445 DT_RETURN_MARK_DECL_FOR(Result, CallNonvirtual##Result##MethodA, ResultType \
1446 , ReturnProbe);\
1447 \
1448 JNI_ENTRY(ResultType, \
1449 jni_CallNonvirtual##Result##MethodA(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, const jvalue *args)) \
1450 \
1451 EntryProbe;\
1452 ResultType ret;\
1453 DT_RETURN_MARK_FOR(Result, CallNonvirtual##Result##MethodA, ResultType, \
1454 (const ResultType&)ret);\
1455 \
1456 JavaValue jvalue(Tag); \
1457 JNI_ArgumentPusherArray ap(methodID, args); \
1458 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_(ResultType{})); \
1459 ret = jvalue.get_##ResultType(); \
1460 return ret;\
1461 JNI_END
1462
1463 // the runtime type of subword integral basic types is integer
1464 DEFINE_CALLNONVIRTUALMETHODA(jboolean, Boolean, T_BOOLEAN
1465 , HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1466 HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHODA_RETURN(_ret_ref))
1467 DEFINE_CALLNONVIRTUALMETHODA(jbyte, Byte, T_BYTE
1468 , HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1469 HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHODA_RETURN(_ret_ref))
1470 DEFINE_CALLNONVIRTUALMETHODA(jchar, Char, T_CHAR
1471 , HOTSPOT_JNI_CALLNONVIRTUALCHARMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1472 HOTSPOT_JNI_CALLNONVIRTUALCHARMETHODA_RETURN(_ret_ref))
1473 DEFINE_CALLNONVIRTUALMETHODA(jshort, Short, T_SHORT
1474 , HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1475 HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHODA_RETURN(_ret_ref))
1476
1477 DEFINE_CALLNONVIRTUALMETHODA(jobject, Object, T_OBJECT
1478 , HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1479 HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHODA_RETURN(_ret_ref))
1480 DEFINE_CALLNONVIRTUALMETHODA(jint, Int, T_INT
1481 , HOTSPOT_JNI_CALLNONVIRTUALINTMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1482 HOTSPOT_JNI_CALLNONVIRTUALINTMETHODA_RETURN(_ret_ref))
1483 DEFINE_CALLNONVIRTUALMETHODA(jlong, Long, T_LONG
1484 , HOTSPOT_JNI_CALLNONVIRTUALLONGMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1485 // Float and double probes don't return value because dtrace doesn't currently support it
1486 HOTSPOT_JNI_CALLNONVIRTUALLONGMETHODA_RETURN(_ret_ref))
1487 DEFINE_CALLNONVIRTUALMETHODA(jfloat, Float, T_FLOAT
1488 , HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1489 HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHODA_RETURN())
1490 DEFINE_CALLNONVIRTUALMETHODA(jdouble, Double, T_DOUBLE
1491 , HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1492 HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHODA_RETURN())
1493
1494 DT_VOID_RETURN_MARK_DECL(CallNonvirtualVoidMethod
1495 , HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHOD_RETURN());
1496 DT_VOID_RETURN_MARK_DECL(CallNonvirtualVoidMethodV
1497 , HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHODV_RETURN());
1498 DT_VOID_RETURN_MARK_DECL(CallNonvirtualVoidMethodA
1499 , HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHODA_RETURN());
1500
1501 JNI_ENTRY(void, jni_CallNonvirtualVoidMethod(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, ...))
1502 HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHOD_ENTRY(env, obj, cls, (uintptr_t) methodID);
1503 DT_VOID_RETURN_MARK(CallNonvirtualVoidMethod);
1504
1505 va_list args;
1506 va_start(args, methodID);
1507 JavaValue jvalue(T_VOID);
1508 JNI_ArgumentPusherVaArg ap(methodID, args);
1509 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK);
1510 va_end(args);
1511 JNI_END
1512
1513
1514 JNI_ENTRY(void, jni_CallNonvirtualVoidMethodV(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, va_list args))
1515 HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHODV_ENTRY(
1516 env, obj, cls, (uintptr_t) methodID);
1517 DT_VOID_RETURN_MARK(CallNonvirtualVoidMethodV);
1518
1519 JavaValue jvalue(T_VOID);
1520 JNI_ArgumentPusherVaArg ap(methodID, args);
1521 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK);
1522 JNI_END
1523
1524
1525 JNI_ENTRY(void, jni_CallNonvirtualVoidMethodA(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, const jvalue *args))
1526 HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHODA_ENTRY(
1527 env, obj, cls, (uintptr_t) methodID);
1528 DT_VOID_RETURN_MARK(CallNonvirtualVoidMethodA);
1529 JavaValue jvalue(T_VOID);
1530 JNI_ArgumentPusherArray ap(methodID, args);
1531 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK);
1532 JNI_END
1533
1534
1535
1536 #define DEFINE_CALLSTATICMETHOD(ResultType, Result, Tag \
1537 , EntryProbe, ResultProbe) \
1538 \
1539 DT_RETURN_MARK_DECL_FOR(Result, CallStatic##Result##Method, ResultType \
1540 , ResultProbe); \
1541 \
1542 JNI_ENTRY(ResultType, \
1543 jni_CallStatic##Result##Method(JNIEnv *env, jclass cls, jmethodID methodID, ...)) \
1544 \
1545 EntryProbe; \
1546 ResultType ret{}; \
1547 DT_RETURN_MARK_FOR(Result, CallStatic##Result##Method, ResultType, \
1548 (const ResultType&)ret);\
1549 \
1550 va_list args; \
1551 va_start(args, methodID); \
1552 JavaValue jvalue(Tag); \
1553 JNI_ArgumentPusherVaArg ap(methodID, args); \
1554 jni_invoke_static(env, &jvalue, nullptr, JNI_STATIC, methodID, &ap, CHECK_(ResultType{})); \
1555 va_end(args); \
1556 ret = jvalue.get_##ResultType(); \
1557 return ret;\
1558 JNI_END
1559
1560 // the runtime type of subword integral basic types is integer
1561 DEFINE_CALLSTATICMETHOD(jboolean, Boolean, T_BOOLEAN
1562 , HOTSPOT_JNI_CALLSTATICBOOLEANMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1563 HOTSPOT_JNI_CALLSTATICBOOLEANMETHOD_RETURN(_ret_ref));
1564 DEFINE_CALLSTATICMETHOD(jbyte, Byte, T_BYTE
1565 , HOTSPOT_JNI_CALLSTATICBYTEMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1566 HOTSPOT_JNI_CALLSTATICBYTEMETHOD_RETURN(_ret_ref));
1567 DEFINE_CALLSTATICMETHOD(jchar, Char, T_CHAR
1568 , HOTSPOT_JNI_CALLSTATICCHARMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1569 HOTSPOT_JNI_CALLSTATICCHARMETHOD_RETURN(_ret_ref));
1570 DEFINE_CALLSTATICMETHOD(jshort, Short, T_SHORT
1571 , HOTSPOT_JNI_CALLSTATICSHORTMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1572 HOTSPOT_JNI_CALLSTATICSHORTMETHOD_RETURN(_ret_ref));
1573
1574 DEFINE_CALLSTATICMETHOD(jobject, Object, T_OBJECT
1575 , HOTSPOT_JNI_CALLSTATICOBJECTMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1576 HOTSPOT_JNI_CALLSTATICOBJECTMETHOD_RETURN(_ret_ref));
1577 DEFINE_CALLSTATICMETHOD(jint, Int, T_INT
1578 , HOTSPOT_JNI_CALLSTATICINTMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1579 HOTSPOT_JNI_CALLSTATICINTMETHOD_RETURN(_ret_ref));
1580 DEFINE_CALLSTATICMETHOD(jlong, Long, T_LONG
1581 , HOTSPOT_JNI_CALLSTATICLONGMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1582 HOTSPOT_JNI_CALLSTATICLONGMETHOD_RETURN(_ret_ref));
1583 // Float and double probes don't return value because dtrace doesn't currently support it
1584 DEFINE_CALLSTATICMETHOD(jfloat, Float, T_FLOAT
1585 , HOTSPOT_JNI_CALLSTATICFLOATMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1586 HOTSPOT_JNI_CALLSTATICFLOATMETHOD_RETURN());
1587 DEFINE_CALLSTATICMETHOD(jdouble, Double, T_DOUBLE
1588 , HOTSPOT_JNI_CALLSTATICDOUBLEMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1589 HOTSPOT_JNI_CALLSTATICDOUBLEMETHOD_RETURN());
1590
1591 #define DEFINE_CALLSTATICMETHODV(ResultType, Result, Tag \
1592 , EntryProbe, ResultProbe) \
1593 \
1594 DT_RETURN_MARK_DECL_FOR(Result, CallStatic##Result##MethodV, ResultType \
1595 , ResultProbe); \
1596 \
1597 JNI_ENTRY(ResultType, \
1598 jni_CallStatic##Result##MethodV(JNIEnv *env, jclass cls, jmethodID methodID, va_list args)) \
1599 \
1600 EntryProbe; \
1601 ResultType ret{}; \
1602 DT_RETURN_MARK_FOR(Result, CallStatic##Result##MethodV, ResultType, \
1603 (const ResultType&)ret);\
1604 \
1605 JavaValue jvalue(Tag); \
1606 JNI_ArgumentPusherVaArg ap(methodID, args); \
1607 /* Make sure class is initialized before trying to invoke its method */ \
1608 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); \
1609 k->initialize(CHECK_(ResultType{})); \
1610 jni_invoke_static(env, &jvalue, nullptr, JNI_STATIC, methodID, &ap, CHECK_(ResultType{})); \
1611 va_end(args); \
1612 ret = jvalue.get_##ResultType(); \
1613 return ret;\
1614 JNI_END
1615
1616 // the runtime type of subword integral basic types is integer
1617 DEFINE_CALLSTATICMETHODV(jboolean, Boolean, T_BOOLEAN
1618 , HOTSPOT_JNI_CALLSTATICBOOLEANMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1619 HOTSPOT_JNI_CALLSTATICBOOLEANMETHODV_RETURN(_ret_ref));
1620 DEFINE_CALLSTATICMETHODV(jbyte, Byte, T_BYTE
1621 , HOTSPOT_JNI_CALLSTATICBYTEMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1622 HOTSPOT_JNI_CALLSTATICBYTEMETHODV_RETURN(_ret_ref));
1623 DEFINE_CALLSTATICMETHODV(jchar, Char, T_CHAR
1624 , HOTSPOT_JNI_CALLSTATICCHARMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1625 HOTSPOT_JNI_CALLSTATICCHARMETHODV_RETURN(_ret_ref));
1626 DEFINE_CALLSTATICMETHODV(jshort, Short, T_SHORT
1627 , HOTSPOT_JNI_CALLSTATICSHORTMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1628 HOTSPOT_JNI_CALLSTATICSHORTMETHODV_RETURN(_ret_ref));
1629
1630 DEFINE_CALLSTATICMETHODV(jobject, Object, T_OBJECT
1631 , HOTSPOT_JNI_CALLSTATICOBJECTMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1632 HOTSPOT_JNI_CALLSTATICOBJECTMETHODV_RETURN(_ret_ref));
1633 DEFINE_CALLSTATICMETHODV(jint, Int, T_INT
1634 , HOTSPOT_JNI_CALLSTATICINTMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1635 HOTSPOT_JNI_CALLSTATICINTMETHODV_RETURN(_ret_ref));
1636 DEFINE_CALLSTATICMETHODV(jlong, Long, T_LONG
1637 , HOTSPOT_JNI_CALLSTATICLONGMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1638 HOTSPOT_JNI_CALLSTATICLONGMETHODV_RETURN(_ret_ref));
1639 // Float and double probes don't return value because dtrace doesn't currently support it
1640 DEFINE_CALLSTATICMETHODV(jfloat, Float, T_FLOAT
1641 , HOTSPOT_JNI_CALLSTATICFLOATMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1642 HOTSPOT_JNI_CALLSTATICFLOATMETHODV_RETURN());
1643 DEFINE_CALLSTATICMETHODV(jdouble, Double, T_DOUBLE
1644 , HOTSPOT_JNI_CALLSTATICDOUBLEMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1645 HOTSPOT_JNI_CALLSTATICDOUBLEMETHODV_RETURN());
1646
1647 #define DEFINE_CALLSTATICMETHODA(ResultType, Result, Tag \
1648 , EntryProbe, ResultProbe) \
1649 \
1650 DT_RETURN_MARK_DECL_FOR(Result, CallStatic##Result##MethodA, ResultType \
1651 , ResultProbe); \
1652 \
1653 JNI_ENTRY(ResultType, \
1654 jni_CallStatic##Result##MethodA(JNIEnv *env, jclass cls, jmethodID methodID, const jvalue *args)) \
1655 \
1656 EntryProbe; \
1657 ResultType ret{}; \
1658 DT_RETURN_MARK_FOR(Result, CallStatic##Result##MethodA, ResultType, \
1659 (const ResultType&)ret);\
1660 \
1661 JavaValue jvalue(Tag); \
1662 JNI_ArgumentPusherArray ap(methodID, args); \
1663 jni_invoke_static(env, &jvalue, nullptr, JNI_STATIC, methodID, &ap, CHECK_(ResultType{})); \
1664 ret = jvalue.get_##ResultType(); \
1665 return ret;\
1666 JNI_END
1667
1668 // the runtime type of subword integral basic types is integer
1669 DEFINE_CALLSTATICMETHODA(jboolean, Boolean, T_BOOLEAN
1670 , HOTSPOT_JNI_CALLSTATICBOOLEANMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1671 HOTSPOT_JNI_CALLSTATICBOOLEANMETHODA_RETURN(_ret_ref));
1672 DEFINE_CALLSTATICMETHODA(jbyte, Byte, T_BYTE
1673 , HOTSPOT_JNI_CALLSTATICBYTEMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1674 HOTSPOT_JNI_CALLSTATICBYTEMETHODA_RETURN(_ret_ref));
1675 DEFINE_CALLSTATICMETHODA(jchar, Char, T_CHAR
1676 , HOTSPOT_JNI_CALLSTATICCHARMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1677 HOTSPOT_JNI_CALLSTATICCHARMETHODA_RETURN(_ret_ref));
1678 DEFINE_CALLSTATICMETHODA(jshort, Short, T_SHORT
1679 , HOTSPOT_JNI_CALLSTATICSHORTMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1680 HOTSPOT_JNI_CALLSTATICSHORTMETHODA_RETURN(_ret_ref));
1681
1682 DEFINE_CALLSTATICMETHODA(jobject, Object, T_OBJECT
1683 , HOTSPOT_JNI_CALLSTATICOBJECTMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1684 HOTSPOT_JNI_CALLSTATICOBJECTMETHODA_RETURN(_ret_ref));
1685 DEFINE_CALLSTATICMETHODA(jint, Int, T_INT
1686 , HOTSPOT_JNI_CALLSTATICINTMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1687 HOTSPOT_JNI_CALLSTATICINTMETHODA_RETURN(_ret_ref));
1688 DEFINE_CALLSTATICMETHODA(jlong, Long, T_LONG
1689 , HOTSPOT_JNI_CALLSTATICLONGMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1690 HOTSPOT_JNI_CALLSTATICLONGMETHODA_RETURN(_ret_ref));
1691 // Float and double probes don't return value because dtrace doesn't currently support it
1692 DEFINE_CALLSTATICMETHODA(jfloat, Float, T_FLOAT
1693 , HOTSPOT_JNI_CALLSTATICFLOATMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1694 HOTSPOT_JNI_CALLSTATICFLOATMETHODA_RETURN());
1695 DEFINE_CALLSTATICMETHODA(jdouble, Double, T_DOUBLE
1696 , HOTSPOT_JNI_CALLSTATICDOUBLEMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1697 HOTSPOT_JNI_CALLSTATICDOUBLEMETHODA_RETURN());
1698
1699 DT_VOID_RETURN_MARK_DECL(CallStaticVoidMethod
1700 , HOTSPOT_JNI_CALLSTATICVOIDMETHOD_RETURN());
1701 DT_VOID_RETURN_MARK_DECL(CallStaticVoidMethodV
1702 , HOTSPOT_JNI_CALLSTATICVOIDMETHODV_RETURN());
1703 DT_VOID_RETURN_MARK_DECL(CallStaticVoidMethodA
1704 , HOTSPOT_JNI_CALLSTATICVOIDMETHODA_RETURN());
1705
1706 JNI_ENTRY(void, jni_CallStaticVoidMethod(JNIEnv *env, jclass cls, jmethodID methodID, ...))
1707 HOTSPOT_JNI_CALLSTATICVOIDMETHOD_ENTRY(env, cls, (uintptr_t) methodID);
1708 DT_VOID_RETURN_MARK(CallStaticVoidMethod);
1709
1710 va_list args;
1711 va_start(args, methodID);
1712 JavaValue jvalue(T_VOID);
1713 JNI_ArgumentPusherVaArg ap(methodID, args);
1714 jni_invoke_static(env, &jvalue, nullptr, JNI_STATIC, methodID, &ap, CHECK);
1715 va_end(args);
1716 JNI_END
1717
1718
1719 JNI_ENTRY(void, jni_CallStaticVoidMethodV(JNIEnv *env, jclass cls, jmethodID methodID, va_list args))
1720 HOTSPOT_JNI_CALLSTATICVOIDMETHODV_ENTRY(env, cls, (uintptr_t) methodID);
1721 DT_VOID_RETURN_MARK(CallStaticVoidMethodV);
1722
1723 JavaValue jvalue(T_VOID);
1724 JNI_ArgumentPusherVaArg ap(methodID, args);
1725 jni_invoke_static(env, &jvalue, nullptr, JNI_STATIC, methodID, &ap, CHECK);
1726 JNI_END
1727
1728
1729 JNI_ENTRY(void, jni_CallStaticVoidMethodA(JNIEnv *env, jclass cls, jmethodID methodID, const jvalue *args))
1730 HOTSPOT_JNI_CALLSTATICVOIDMETHODA_ENTRY(env, cls, (uintptr_t) methodID);
1731 DT_VOID_RETURN_MARK(CallStaticVoidMethodA);
1732
1733 JavaValue jvalue(T_VOID);
1734 JNI_ArgumentPusherArray ap(methodID, args);
1735 jni_invoke_static(env, &jvalue, nullptr, JNI_STATIC, methodID, &ap, CHECK);
1736 JNI_END
1737
1738
1739 //
1740 // Accessing Fields
1741 //
1742
1743
1744 DT_RETURN_MARK_DECL(GetFieldID, jfieldID
1745 , HOTSPOT_JNI_GETFIELDID_RETURN((uintptr_t)_ret_ref));
1746
1747 JNI_ENTRY(jfieldID, jni_GetFieldID(JNIEnv *env, jclass clazz,
1748 const char *name, const char *sig))
1749 HOTSPOT_JNI_GETFIELDID_ENTRY(env, clazz, (char *) name, (char *) sig);
1750 jfieldID ret = nullptr;
1751 DT_RETURN_MARK(GetFieldID, jfieldID, (const jfieldID&)ret);
1752
1753 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz));
1754
1755 // The class should have been loaded (we have an instance of the class
1756 // passed in) so the field and signature should already be in the symbol
1757 // table. If they're not there, the field doesn't exist.
1758 TempNewSymbol fieldname = SymbolTable::probe(name, (int)strlen(name));
1759 TempNewSymbol signame = SymbolTable::probe(sig, (int)strlen(sig));
1760 if (fieldname == nullptr || signame == nullptr) {
1761 ResourceMark rm;
1762 THROW_MSG_NULL(vmSymbols::java_lang_NoSuchFieldError(), err_msg("%s.%s %s", k->external_name(), name, sig));
1763 }
1764
1765 // Make sure class is initialized before handing id's out to fields
1766 k->initialize(CHECK_NULL);
1767
1768 fieldDescriptor fd;
1769 if (!k->is_instance_klass() ||
1770 !InstanceKlass::cast(k)->find_field(fieldname, signame, false, &fd)) {
1771 ResourceMark rm;
1772 THROW_MSG_NULL(vmSymbols::java_lang_NoSuchFieldError(), err_msg("%s.%s %s", k->external_name(), name, sig));
1773 }
1774
1775 // A jfieldID for a non-static field is simply the offset of the field within the instanceOop
1776 // It may also have hash bits for k, if VerifyJNIFields is turned on.
1777 ret = jfieldIDWorkaround::to_instance_jfieldID(k, fd.offset(), fd.is_flat());
1778 return ret;
1779 JNI_END
1780
1781
1782 JNI_ENTRY(jobject, jni_GetObjectField(JNIEnv *env, jobject obj, jfieldID fieldID))
1783 HOTSPOT_JNI_GETOBJECTFIELD_ENTRY(env, obj, (uintptr_t) fieldID);
1784 oop o = JNIHandles::resolve_non_null(obj);
1785 Klass* k = o->klass();
1786 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID);
1787 oop res = nullptr;
1788 // Keep JVMTI addition small and only check enabled flag here.
1789 // jni_GetField_probe() assumes that is okay to create handles.
1790 if (JvmtiExport::should_post_field_access()) {
1791 o = JvmtiExport::jni_GetField_probe(thread, obj, o, k, fieldID, false);
1792 }
1793 if (!jfieldIDWorkaround::is_flat_jfieldID(fieldID)) {
1794 res = HeapAccess<ON_UNKNOWN_OOP_REF>::oop_load_at(o, offset);
1795 } else {
1796 InstanceKlass* ik = InstanceKlass::cast(k);
1797 fieldDescriptor fd;
1798 bool found = ik->find_field_from_offset(offset, false, &fd); // performance bottleneck
1799 assert(found, "Field not found");
1800 FlatFieldPayload payload(instanceOop(o), &fd);
1801 res = payload.read(CHECK_NULL);
1802 }
1803 jobject ret = JNIHandles::make_local(THREAD, res);
1804 HOTSPOT_JNI_GETOBJECTFIELD_RETURN(ret);
1805 return ret;
1806 JNI_END
1807
1808
1809
1810 #define DEFINE_GETFIELD(Return,Fieldname,Result \
1811 , EntryProbe, ReturnProbe) \
1812 \
1813 DT_RETURN_MARK_DECL_FOR(Result, Get##Result##Field, Return \
1814 , ReturnProbe); \
1815 \
1816 JNI_ENTRY_NO_PRESERVE(Return, jni_Get##Result##Field(JNIEnv *env, jobject obj, jfieldID fieldID)) \
1817 \
1818 EntryProbe; \
1819 Return ret = 0;\
1820 DT_RETURN_MARK_FOR(Result, Get##Result##Field, Return, (const Return&)ret);\
1821 \
1822 oop o = JNIHandles::resolve_non_null(obj); \
1823 Klass* k = o->klass(); \
1824 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID); \
1825 /* Keep JVMTI addition small and only check enabled flag here. */ \
1826 if (JvmtiExport::should_post_field_access()) { \
1827 o = JvmtiExport::jni_GetField_probe(thread, obj, o, k, fieldID, false); \
1828 } \
1829 ret = o->Fieldname##_field(offset); \
1830 return ret; \
1831 JNI_END
1832
1833 DEFINE_GETFIELD(jboolean, bool, Boolean
1834 , HOTSPOT_JNI_GETBOOLEANFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
1835 HOTSPOT_JNI_GETBOOLEANFIELD_RETURN(_ret_ref))
1836 DEFINE_GETFIELD(jbyte, byte, Byte
1837 , HOTSPOT_JNI_GETBYTEFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
1838 HOTSPOT_JNI_GETBYTEFIELD_RETURN(_ret_ref))
1839 DEFINE_GETFIELD(jchar, char, Char
1840 , HOTSPOT_JNI_GETCHARFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
1841 HOTSPOT_JNI_GETCHARFIELD_RETURN(_ret_ref))
1842 DEFINE_GETFIELD(jshort, short, Short
1843 , HOTSPOT_JNI_GETSHORTFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
1844 HOTSPOT_JNI_GETSHORTFIELD_RETURN(_ret_ref))
1845 DEFINE_GETFIELD(jint, int, Int
1846 , HOTSPOT_JNI_GETINTFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
1847 HOTSPOT_JNI_GETINTFIELD_RETURN(_ret_ref))
1848 DEFINE_GETFIELD(jlong, long, Long
1849 , HOTSPOT_JNI_GETLONGFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
1850 HOTSPOT_JNI_GETLONGFIELD_RETURN(_ret_ref))
1851 // Float and double probes don't return value because dtrace doesn't currently support it
1852 DEFINE_GETFIELD(jfloat, float, Float
1853 , HOTSPOT_JNI_GETFLOATFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
1854 HOTSPOT_JNI_GETFLOATFIELD_RETURN())
1855 DEFINE_GETFIELD(jdouble, double, Double
1856 , HOTSPOT_JNI_GETDOUBLEFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
1857 HOTSPOT_JNI_GETDOUBLEFIELD_RETURN())
1858
1859 address jni_GetBooleanField_addr() {
1860 return (address)jni_GetBooleanField;
1861 }
1862 address jni_GetByteField_addr() {
1863 return (address)jni_GetByteField;
1864 }
1865 address jni_GetCharField_addr() {
1866 return (address)jni_GetCharField;
1867 }
1868 address jni_GetShortField_addr() {
1869 return (address)jni_GetShortField;
1870 }
1871 address jni_GetIntField_addr() {
1872 return (address)jni_GetIntField;
1873 }
1874 address jni_GetLongField_addr() {
1875 return (address)jni_GetLongField;
1876 }
1877 address jni_GetFloatField_addr() {
1878 return (address)jni_GetFloatField;
1879 }
1880 address jni_GetDoubleField_addr() {
1881 return (address)jni_GetDoubleField;
1882 }
1883
1884 static void log_debug_if_final_static_field(JavaThread* current, const char* func_name, InstanceKlass* ik, int offset) {
1885 if (log_is_enabled(Debug, jni)) {
1886 fieldDescriptor fd;
1887 bool found = ik->find_field_from_offset(offset, true, &fd);
1888 assert(found, "bad field offset");
1889 assert(fd.is_static(), "static/instance mismatch");
1890 if (fd.is_final() && !fd.is_mutable_static_final()) {
1891 ResourceMark rm(current);
1892 log_debug(jni)("%s mutated final static field %s.%s", func_name, ik->external_name(), fd.name()->as_C_string());
1893 }
1894 }
1895 }
1896
1897 static void log_debug_if_final_instance_field(JavaThread* current, const char* func_name, InstanceKlass* ik, int offset) {
1898 if (log_is_enabled(Debug, jni)) {
1899 fieldDescriptor fd;
1900 bool found = ik->find_field_from_offset(offset, false, &fd);
1901 assert(found, "bad field offset");
1902 assert(!fd.is_static(), "static/instance mismatch");
1903 if (fd.is_final()) {
1904 ResourceMark rm(current);
1905 log_debug(jni)("%s mutated final instance field %s.%s", func_name, ik->external_name(), fd.name()->as_C_string());
1906 }
1907 }
1908 }
1909
1910 JNI_ENTRY_NO_PRESERVE(void, jni_SetObjectField(JNIEnv *env, jobject obj, jfieldID fieldID, jobject value))
1911 HOTSPOT_JNI_SETOBJECTFIELD_ENTRY(env, obj, (uintptr_t) fieldID, value);
1912 oop o = JNIHandles::resolve_non_null(obj);
1913 Klass* k = o->klass();
1914 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID);
1915 // Keep JVMTI addition small and only check enabled flag here.
1916 if (JvmtiExport::should_post_field_modification()) {
1917 jvalue field_value;
1918 field_value.l = value;
1919 o = JvmtiExport::jni_SetField_probe(thread, obj, o, k, fieldID, false, JVM_SIGNATURE_CLASS, (jvalue *)&field_value);
1920 }
1921 if (!jfieldIDWorkaround::is_flat_jfieldID(fieldID)) {
1922 oop v = JNIHandles::resolve(value);
1923 if (v == nullptr) {
1924 InstanceKlass *ik = InstanceKlass::cast(k);
1925 fieldDescriptor fd;
1926 ik->find_field_from_offset(offset, false, &fd);
1927 if (fd.is_null_free_inline_type()) {
1928 THROW_MSG(vmSymbols::java_lang_NullPointerException(), "Cannot store null in a null-restricted field");
1929 }
1930 }
1931 HeapAccess<ON_UNKNOWN_OOP_REF>::oop_store_at(o, offset, v);
1932 } else {
1933 assert(k->is_instance_klass(), "Only instances can have flat fields");
1934 InstanceKlass* ik = InstanceKlass::cast(k);
1935 fieldDescriptor fd;
1936 bool found = ik->find_field_from_offset(offset, false, &fd);
1937 assert(found, "Field not found");
1938 FlatFieldPayload payload(instanceOop(o), &fd);
1939 payload.write(inlineOop(JNIHandles::resolve(value)), CHECK);
1940 }
1941 log_debug_if_final_instance_field(thread, "SetObjectField", InstanceKlass::cast(k), offset);
1942 HOTSPOT_JNI_SETOBJECTFIELD_RETURN();
1943 JNI_END
1944
1945 // TODO: make this a template
1946
1947 #define DEFINE_SETFIELD(Argument,Fieldname,Result,SigType,unionType \
1948 , EntryProbe, ReturnProbe) \
1949 \
1950 JNI_ENTRY_NO_PRESERVE(void, jni_Set##Result##Field(JNIEnv *env, jobject obj, jfieldID fieldID, Argument value)) \
1951 \
1952 EntryProbe; \
1953 \
1954 oop o = JNIHandles::resolve_non_null(obj); \
1955 Klass* k = o->klass(); \
1956 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID); \
1957 /* Keep JVMTI addition small and only check enabled flag here. */ \
1958 if (JvmtiExport::should_post_field_modification()) { \
1959 jvalue field_value; \
1960 field_value.unionType = value; \
1961 o = JvmtiExport::jni_SetField_probe(thread, obj, o, k, fieldID, false, SigType, (jvalue *)&field_value); \
1962 } \
1963 o->Fieldname##_field_put(offset, value); \
1964 log_debug_if_final_instance_field(thread, "Set<Type>Field", InstanceKlass::cast(k), offset); \
1965 ReturnProbe; \
1966 JNI_END
1967
1968 DEFINE_SETFIELD(jboolean, bool, Boolean, JVM_SIGNATURE_BOOLEAN, z
1969 , HOTSPOT_JNI_SETBOOLEANFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value),
1970 HOTSPOT_JNI_SETBOOLEANFIELD_RETURN())
1971 DEFINE_SETFIELD(jbyte, byte, Byte, JVM_SIGNATURE_BYTE, b
1972 , HOTSPOT_JNI_SETBYTEFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value),
1973 HOTSPOT_JNI_SETBYTEFIELD_RETURN())
1974 DEFINE_SETFIELD(jchar, char, Char, JVM_SIGNATURE_CHAR, c
1975 , HOTSPOT_JNI_SETCHARFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value),
1976 HOTSPOT_JNI_SETCHARFIELD_RETURN())
1977 DEFINE_SETFIELD(jshort, short, Short, JVM_SIGNATURE_SHORT, s
1978 , HOTSPOT_JNI_SETSHORTFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value),
1979 HOTSPOT_JNI_SETSHORTFIELD_RETURN())
1980 DEFINE_SETFIELD(jint, int, Int, JVM_SIGNATURE_INT, i
1981 , HOTSPOT_JNI_SETINTFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value),
1982 HOTSPOT_JNI_SETINTFIELD_RETURN())
1983 DEFINE_SETFIELD(jlong, long, Long, JVM_SIGNATURE_LONG, j
1984 , HOTSPOT_JNI_SETLONGFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value),
1985 HOTSPOT_JNI_SETLONGFIELD_RETURN())
1986 // Float and double probes don't return value because dtrace doesn't currently support it
1987 DEFINE_SETFIELD(jfloat, float, Float, JVM_SIGNATURE_FLOAT, f
1988 , HOTSPOT_JNI_SETFLOATFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
1989 HOTSPOT_JNI_SETFLOATFIELD_RETURN())
1990 DEFINE_SETFIELD(jdouble, double, Double, JVM_SIGNATURE_DOUBLE, d
1991 , HOTSPOT_JNI_SETDOUBLEFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
1992 HOTSPOT_JNI_SETDOUBLEFIELD_RETURN())
1993
1994 DT_RETURN_MARK_DECL(ToReflectedField, jobject
1995 , HOTSPOT_JNI_TOREFLECTEDFIELD_RETURN(_ret_ref));
1996
1997 JNI_ENTRY(jobject, jni_ToReflectedField(JNIEnv *env, jclass cls, jfieldID fieldID, jboolean isStatic))
1998 HOTSPOT_JNI_TOREFLECTEDFIELD_ENTRY(env, cls, (uintptr_t) fieldID, isStatic);
1999 jobject ret = nullptr;
2000 DT_RETURN_MARK(ToReflectedField, jobject, (const jobject&)ret);
2001
2002 fieldDescriptor fd;
2003 bool found = false;
2004 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2005
2006 assert(jfieldIDWorkaround::is_static_jfieldID(fieldID) == (isStatic != 0), "invalid fieldID");
2007
2008 if (isStatic) {
2009 // Static field. The fieldID a JNIid specifying the field holder and the offset within the Klass*.
2010 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID);
2011 assert(id->is_static_field_id(), "invalid static field id");
2012 found = id->find_local_field(&fd);
2013 } else {
2014 // Non-static field. The fieldID is really the offset of the field within the instanceOop.
2015 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID);
2016 found = InstanceKlass::cast(k)->find_field_from_offset(offset, false, &fd);
2017 }
2018 assert(found, "bad fieldID passed into jni_ToReflectedField");
2019 oop reflected = Reflection::new_field(&fd, CHECK_NULL);
2020 ret = JNIHandles::make_local(THREAD, reflected);
2021 return ret;
2022 JNI_END
2023
2024
2025 //
2026 // Accessing Static Fields
2027 //
2028 DT_RETURN_MARK_DECL(GetStaticFieldID, jfieldID
2029 , HOTSPOT_JNI_GETSTATICFIELDID_RETURN((uintptr_t)_ret_ref));
2030
2031 JNI_ENTRY(jfieldID, jni_GetStaticFieldID(JNIEnv *env, jclass clazz,
2032 const char *name, const char *sig))
2033 HOTSPOT_JNI_GETSTATICFIELDID_ENTRY(env, clazz, (char *) name, (char *) sig);
2034 jfieldID ret = nullptr;
2035 DT_RETURN_MARK(GetStaticFieldID, jfieldID, (const jfieldID&)ret);
2036
2037 // The class should have been loaded (we have an instance of the class
2038 // passed in) so the field and signature should already be in the symbol
2039 // table. If they're not there, the field doesn't exist.
2040 TempNewSymbol fieldname = SymbolTable::probe(name, (int)strlen(name));
2041 TempNewSymbol signame = SymbolTable::probe(sig, (int)strlen(sig));
2042 if (fieldname == nullptr || signame == nullptr) {
2043 THROW_MSG_NULL(vmSymbols::java_lang_NoSuchFieldError(), (char*) name);
2044 }
2045 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz));
2046 // Make sure class is initialized before handing id's out to static fields
2047 k->initialize(CHECK_NULL);
2048
2049 fieldDescriptor fd;
2050 if (!k->is_instance_klass() ||
2051 !InstanceKlass::cast(k)->find_field(fieldname, signame, true, &fd)) {
2052 THROW_MSG_NULL(vmSymbols::java_lang_NoSuchFieldError(), (char*) name);
2053 }
2054
2055 // A jfieldID for a static field is a JNIid specifying the field holder and the offset within the Klass*
2056 JNIid* id = fd.field_holder()->jni_id_for(fd.offset());
2057 DEBUG_ONLY(id->set_is_static_field_id();)
2058
2059 DEBUG_ONLY(id->verify(fd.field_holder()));
2060
2061 ret = jfieldIDWorkaround::to_static_jfieldID(id);
2062 return ret;
2063 JNI_END
2064
2065
2066 JNI_ENTRY(jobject, jni_GetStaticObjectField(JNIEnv *env, jclass clazz, jfieldID fieldID))
2067 HOTSPOT_JNI_GETSTATICOBJECTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID);
2068 #if INCLUDE_JNI_CHECK
2069 DEBUG_ONLY(Klass* param_k = jniCheck::validate_class(thread, clazz);)
2070 #endif // INCLUDE_JNI_CHECK
2071 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID);
2072 assert(id->is_static_field_id(), "invalid static field id");
2073 // Keep JVMTI addition small and only check enabled flag here.
2074 // jni_GetField_probe() assumes that is okay to create handles.
2075 if (JvmtiExport::should_post_field_access()) {
2076 JvmtiExport::jni_GetField_probe(thread, nullptr, nullptr, id->holder(), fieldID, true);
2077 }
2078 jobject ret = JNIHandles::make_local(THREAD, id->holder()->java_mirror()->obj_field(id->offset()));
2079 HOTSPOT_JNI_GETSTATICOBJECTFIELD_RETURN(ret);
2080 return ret;
2081 JNI_END
2082
2083
2084 #define DEFINE_GETSTATICFIELD(Return,Fieldname,Result \
2085 , EntryProbe, ReturnProbe) \
2086 \
2087 DT_RETURN_MARK_DECL_FOR(Result, GetStatic##Result##Field, Return \
2088 , ReturnProbe); \
2089 \
2090 JNI_ENTRY(Return, jni_GetStatic##Result##Field(JNIEnv *env, jclass clazz, jfieldID fieldID)) \
2091 EntryProbe; \
2092 Return ret = 0;\
2093 DT_RETURN_MARK_FOR(Result, GetStatic##Result##Field, Return, \
2094 (const Return&)ret);\
2095 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID); \
2096 assert(id->is_static_field_id(), "invalid static field id"); \
2097 /* Keep JVMTI addition small and only check enabled flag here. */ \
2098 /* jni_GetField_probe() assumes that is okay to create handles. */ \
2099 if (JvmtiExport::should_post_field_access()) { \
2100 JvmtiExport::jni_GetField_probe(thread, nullptr, nullptr, id->holder(), fieldID, true); \
2101 } \
2102 ret = id->holder()->java_mirror()-> Fieldname##_field (id->offset()); \
2103 return ret;\
2104 JNI_END
2105
2106 DEFINE_GETSTATICFIELD(jboolean, bool, Boolean
2107 , HOTSPOT_JNI_GETSTATICBOOLEANFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICBOOLEANFIELD_RETURN(_ret_ref))
2108 DEFINE_GETSTATICFIELD(jbyte, byte, Byte
2109 , HOTSPOT_JNI_GETSTATICBYTEFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICBYTEFIELD_RETURN(_ret_ref) )
2110 DEFINE_GETSTATICFIELD(jchar, char, Char
2111 , HOTSPOT_JNI_GETSTATICCHARFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICCHARFIELD_RETURN(_ret_ref) )
2112 DEFINE_GETSTATICFIELD(jshort, short, Short
2113 , HOTSPOT_JNI_GETSTATICSHORTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICSHORTFIELD_RETURN(_ret_ref) )
2114 DEFINE_GETSTATICFIELD(jint, int, Int
2115 , HOTSPOT_JNI_GETSTATICINTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICINTFIELD_RETURN(_ret_ref) )
2116 DEFINE_GETSTATICFIELD(jlong, long, Long
2117 , HOTSPOT_JNI_GETSTATICLONGFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICLONGFIELD_RETURN(_ret_ref) )
2118 // Float and double probes don't return value because dtrace doesn't currently support it
2119 DEFINE_GETSTATICFIELD(jfloat, float, Float
2120 , HOTSPOT_JNI_GETSTATICFLOATFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICFLOATFIELD_RETURN() )
2121 DEFINE_GETSTATICFIELD(jdouble, double, Double
2122 , HOTSPOT_JNI_GETSTATICDOUBLEFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICDOUBLEFIELD_RETURN() )
2123
2124 JNI_ENTRY(void, jni_SetStaticObjectField(JNIEnv *env, jclass clazz, jfieldID fieldID, jobject value))
2125 HOTSPOT_JNI_SETSTATICOBJECTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value);
2126 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID);
2127 assert(id->is_static_field_id(), "invalid static field id");
2128 // Keep JVMTI addition small and only check enabled flag here.
2129 // jni_SetField_probe() assumes that is okay to create handles.
2130 if (JvmtiExport::should_post_field_modification()) {
2131 jvalue field_value;
2132 field_value.l = value;
2133 JvmtiExport::jni_SetField_probe(thread, nullptr, nullptr, id->holder(), fieldID, true, JVM_SIGNATURE_CLASS, (jvalue *)&field_value);
2134 }
2135 id->holder()->java_mirror()->obj_field_put(id->offset(), JNIHandles::resolve(value));
2136 log_debug_if_final_static_field(THREAD, "SetStaticObjectField", id->holder(), id->offset());
2137 HOTSPOT_JNI_SETSTATICOBJECTFIELD_RETURN();
2138 JNI_END
2139
2140
2141
2142 #define DEFINE_SETSTATICFIELD(Argument,Fieldname,Result,SigType,unionType \
2143 , EntryProbe, ReturnProbe) \
2144 \
2145 JNI_ENTRY(void, jni_SetStatic##Result##Field(JNIEnv *env, jclass clazz, jfieldID fieldID, Argument value)) \
2146 EntryProbe; \
2147 \
2148 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID); \
2149 assert(id->is_static_field_id(), "invalid static field id"); \
2150 /* Keep JVMTI addition small and only check enabled flag here. */ \
2151 /* jni_SetField_probe() assumes that is okay to create handles. */ \
2152 if (JvmtiExport::should_post_field_modification()) { \
2153 jvalue field_value; \
2154 field_value.unionType = value; \
2155 JvmtiExport::jni_SetField_probe(thread, nullptr, nullptr, id->holder(), fieldID, true, SigType, (jvalue *)&field_value); \
2156 } \
2157 id->holder()->java_mirror()-> Fieldname##_field_put (id->offset(), value); \
2158 log_debug_if_final_static_field(THREAD, "SetStatic<Type>Field", id->holder(), id->offset()); \
2159 ReturnProbe;\
2160 JNI_END
2161
2162 DEFINE_SETSTATICFIELD(jboolean, bool, Boolean, JVM_SIGNATURE_BOOLEAN, z
2163 , HOTSPOT_JNI_SETSTATICBOOLEANFIELD_ENTRY(env, clazz, (uintptr_t)fieldID, value),
2164 HOTSPOT_JNI_SETSTATICBOOLEANFIELD_RETURN())
2165 DEFINE_SETSTATICFIELD(jbyte, byte, Byte, JVM_SIGNATURE_BYTE, b
2166 , HOTSPOT_JNI_SETSTATICBYTEFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value),
2167 HOTSPOT_JNI_SETSTATICBYTEFIELD_RETURN())
2168 DEFINE_SETSTATICFIELD(jchar, char, Char, JVM_SIGNATURE_CHAR, c
2169 , HOTSPOT_JNI_SETSTATICCHARFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value),
2170 HOTSPOT_JNI_SETSTATICCHARFIELD_RETURN())
2171 DEFINE_SETSTATICFIELD(jshort, short, Short, JVM_SIGNATURE_SHORT, s
2172 , HOTSPOT_JNI_SETSTATICSHORTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value),
2173 HOTSPOT_JNI_SETSTATICSHORTFIELD_RETURN())
2174 DEFINE_SETSTATICFIELD(jint, int, Int, JVM_SIGNATURE_INT, i
2175 , HOTSPOT_JNI_SETSTATICINTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value),
2176 HOTSPOT_JNI_SETSTATICINTFIELD_RETURN())
2177 DEFINE_SETSTATICFIELD(jlong, long, Long, JVM_SIGNATURE_LONG, j
2178 , HOTSPOT_JNI_SETSTATICLONGFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value),
2179 HOTSPOT_JNI_SETSTATICLONGFIELD_RETURN())
2180 // Float and double probes don't return value because dtrace doesn't currently support it
2181 DEFINE_SETSTATICFIELD(jfloat, float, Float, JVM_SIGNATURE_FLOAT, f
2182 , HOTSPOT_JNI_SETSTATICFLOATFIELD_ENTRY(env, clazz, (uintptr_t) fieldID),
2183 HOTSPOT_JNI_SETSTATICFLOATFIELD_RETURN())
2184 DEFINE_SETSTATICFIELD(jdouble, double, Double, JVM_SIGNATURE_DOUBLE, d
2185 , HOTSPOT_JNI_SETSTATICDOUBLEFIELD_ENTRY(env, clazz, (uintptr_t) fieldID),
2186 HOTSPOT_JNI_SETSTATICDOUBLEFIELD_RETURN())
2187
2188 //
2189 // String Operations
2190 //
2191
2192 // Unicode Interface
2193
2194 DT_RETURN_MARK_DECL(NewString, jstring
2195 , HOTSPOT_JNI_NEWSTRING_RETURN(_ret_ref));
2196
2197 JNI_ENTRY(jstring, jni_NewString(JNIEnv *env, const jchar *unicodeChars, jsize len))
2198 HOTSPOT_JNI_NEWSTRING_ENTRY(env, (uint16_t *) unicodeChars, len);
2199 jstring ret = nullptr;
2200 DT_RETURN_MARK(NewString, jstring, (const jstring&)ret);
2201 oop string=java_lang_String::create_oop_from_unicode((jchar*) unicodeChars, len, CHECK_NULL);
2202 ret = (jstring) JNIHandles::make_local(THREAD, string);
2203 return ret;
2204 JNI_END
2205
2206
2207 JNI_ENTRY_NO_PRESERVE(jsize, jni_GetStringLength(JNIEnv *env, jstring string))
2208 HOTSPOT_JNI_GETSTRINGLENGTH_ENTRY(env, string);
2209 jsize ret = 0;
2210 oop s = JNIHandles::resolve_non_null(string);
2211 ret = java_lang_String::length(s);
2212 HOTSPOT_JNI_GETSTRINGLENGTH_RETURN(ret);
2213 return ret;
2214 JNI_END
2215
2216
2217 JNI_ENTRY_NO_PRESERVE(const jchar*, jni_GetStringChars(
2218 JNIEnv *env, jstring string, jboolean *isCopy))
2219 HOTSPOT_JNI_GETSTRINGCHARS_ENTRY(env, string, (uintptr_t *) isCopy);
2220 jchar* buf = nullptr;
2221 oop s = JNIHandles::resolve_non_null(string);
2222 typeArrayOop s_value = java_lang_String::value(s);
2223 if (s_value != nullptr) {
2224 int s_len = java_lang_String::length(s, s_value);
2225 bool is_latin1 = java_lang_String::is_latin1(s);
2226 buf = NEW_C_HEAP_ARRAY_RETURN_NULL(jchar, s_len + 1, mtInternal); // add one for zero termination
2227 /* JNI Specification states return null on OOM */
2228 if (buf != nullptr) {
2229 if (s_len > 0) {
2230 if (!is_latin1) {
2231 ArrayAccess<>::arraycopy_to_native(s_value, (size_t) typeArrayOopDesc::element_offset<jchar>(0),
2232 buf, s_len);
2233 } else {
2234 for (int i = 0; i < s_len; i++) {
2235 buf[i] = ((jchar) s_value->byte_at(i)) & 0xff;
2236 }
2237 }
2238 }
2239 buf[s_len] = 0;
2240 //%note jni_5
2241 if (isCopy != nullptr) {
2242 *isCopy = JNI_TRUE;
2243 }
2244 }
2245 }
2246 HOTSPOT_JNI_GETSTRINGCHARS_RETURN(buf);
2247 return buf;
2248 JNI_END
2249
2250
2251 JNI_ENTRY_NO_PRESERVE(void, jni_ReleaseStringChars(JNIEnv *env, jstring str, const jchar *chars))
2252 HOTSPOT_JNI_RELEASESTRINGCHARS_ENTRY(env, str, (uint16_t *) chars);
2253 //%note jni_6
2254 if (chars != nullptr) {
2255 // Since String objects are supposed to be immutable, don't copy any
2256 // new data back. A bad user will have to go after the char array.
2257 FreeHeap((void*) chars);
2258 }
2259 HOTSPOT_JNI_RELEASESTRINGCHARS_RETURN();
2260 JNI_END
2261
2262
2263 // UTF Interface
2264
2265 DT_RETURN_MARK_DECL(NewStringUTF, jstring
2266 , HOTSPOT_JNI_NEWSTRINGUTF_RETURN(_ret_ref));
2267
2268 JNI_ENTRY(jstring, jni_NewStringUTF(JNIEnv *env, const char *bytes))
2269 HOTSPOT_JNI_NEWSTRINGUTF_ENTRY(env, (char *) bytes);
2270 jstring ret;
2271 DT_RETURN_MARK(NewStringUTF, jstring, (const jstring&)ret);
2272
2273 oop result = java_lang_String::create_oop_from_str((char*) bytes, CHECK_NULL);
2274 ret = (jstring) JNIHandles::make_local(THREAD, result);
2275 return ret;
2276 JNI_END
2277
2278
2279 JNI_ENTRY(jsize, jni_GetStringUTFLength(JNIEnv *env, jstring string))
2280 HOTSPOT_JNI_GETSTRINGUTFLENGTH_ENTRY(env, string);
2281 oop java_string = JNIHandles::resolve_non_null(string);
2282 jsize ret = java_lang_String::utf8_length_as_int(java_string);
2283 HOTSPOT_JNI_GETSTRINGUTFLENGTH_RETURN(ret);
2284 return ret;
2285 JNI_END
2286
2287 JNI_ENTRY(jlong, jni_GetStringUTFLengthAsLong(JNIEnv *env, jstring string))
2288 HOTSPOT_JNI_GETSTRINGUTFLENGTHASLONG_ENTRY(env, string);
2289 oop java_string = JNIHandles::resolve_non_null(string);
2290 size_t ret = java_lang_String::utf8_length(java_string);
2291 HOTSPOT_JNI_GETSTRINGUTFLENGTHASLONG_RETURN(ret);
2292 return checked_cast<jlong>(ret);
2293 JNI_END
2294
2295
2296 JNI_ENTRY(const char*, jni_GetStringUTFChars(JNIEnv *env, jstring string, jboolean *isCopy))
2297 HOTSPOT_JNI_GETSTRINGUTFCHARS_ENTRY(env, string, (uintptr_t *) isCopy);
2298 char* result = nullptr;
2299 oop java_string = JNIHandles::resolve_non_null(string);
2300 typeArrayOop s_value = java_lang_String::value(java_string);
2301 if (s_value != nullptr) {
2302 size_t length = java_lang_String::utf8_length(java_string, s_value);
2303 // JNI Specification states return null on OOM.
2304 // The resulting sequence doesn't have to be NUL-terminated but we do.
2305 result = AllocateHeap(length + 1, mtInternal, AllocFailStrategy::RETURN_NULL);
2306 if (result != nullptr) {
2307 java_lang_String::as_utf8_string(java_string, s_value, result, length + 1);
2308 if (isCopy != nullptr) {
2309 *isCopy = JNI_TRUE;
2310 }
2311 }
2312 }
2313 HOTSPOT_JNI_GETSTRINGUTFCHARS_RETURN(result);
2314 return result;
2315 JNI_END
2316
2317
2318 JNI_LEAF(void, jni_ReleaseStringUTFChars(JNIEnv *env, jstring str, const char *chars))
2319 HOTSPOT_JNI_RELEASESTRINGUTFCHARS_ENTRY(env, str, (char *) chars);
2320 if (chars != nullptr) {
2321 FreeHeap((char*) chars);
2322 }
2323 HOTSPOT_JNI_RELEASESTRINGUTFCHARS_RETURN();
2324 JNI_END
2325
2326
2327 JNI_ENTRY_NO_PRESERVE(jsize, jni_GetArrayLength(JNIEnv *env, jarray array))
2328 HOTSPOT_JNI_GETARRAYLENGTH_ENTRY(env, array);
2329 arrayOop a = arrayOop(JNIHandles::resolve_non_null(array));
2330 assert(a->is_array(), "must be array");
2331 jsize ret = a->length();
2332 HOTSPOT_JNI_GETARRAYLENGTH_RETURN(ret);
2333 return ret;
2334 JNI_END
2335
2336
2337 //
2338 // Object Array Operations
2339 //
2340
2341 DT_RETURN_MARK_DECL(NewObjectArray, jobjectArray
2342 , HOTSPOT_JNI_NEWOBJECTARRAY_RETURN(_ret_ref));
2343
2344 JNI_ENTRY(jobjectArray, jni_NewObjectArray(JNIEnv *env, jsize length, jclass elementClass, jobject initialElement))
2345 HOTSPOT_JNI_NEWOBJECTARRAY_ENTRY(env, length, elementClass, initialElement);
2346 jobjectArray ret = nullptr;
2347 DT_RETURN_MARK(NewObjectArray, jobjectArray, (const jobjectArray&)ret);
2348 Klass* ek = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(elementClass));
2349
2350 // Make sure bottom_klass is initialized.
2351 ek->initialize(CHECK_NULL);
2352 objArrayOop result = oopFactory::new_objArray(ek, length, CHECK_NULL);
2353
2354 oop initial_value = JNIHandles::resolve(initialElement);
2355 if (initial_value != nullptr) { // array already initialized with null
2356 for (int index = 0; index < length; index++) {
2357 result->obj_at_put(index, initial_value);
2358 }
2359 }
2360 ret = (jobjectArray) JNIHandles::make_local(THREAD, result);
2361 return ret;
2362 JNI_END
2363
2364 DT_RETURN_MARK_DECL(GetObjectArrayElement, jobject
2365 , HOTSPOT_JNI_GETOBJECTARRAYELEMENT_RETURN(_ret_ref));
2366
2367 JNI_ENTRY(jobject, jni_GetObjectArrayElement(JNIEnv *env, jobjectArray array, jsize index))
2368 HOTSPOT_JNI_GETOBJECTARRAYELEMENT_ENTRY(env, array, index);
2369 jobject ret = nullptr;
2370 DT_RETURN_MARK(GetObjectArrayElement, jobject, (const jobject&)ret);
2371 objArrayOop a = oop_cast<objArrayOop>(JNIHandles::resolve_non_null(array));
2372 if (a->is_within_bounds(index)) {
2373 oop res = a->obj_at(index, CHECK_NULL);
2374 assert(res != nullptr || !a->is_null_free_array(), "Invalid value");
2375 ret = JNIHandles::make_local(THREAD, res);
2376 return ret;
2377 } else {
2378 ResourceMark rm(THREAD);
2379 stringStream ss;
2380 ss.print("Index %d out of bounds for length %d", index, a->length());
2381 THROW_MSG_NULL(vmSymbols::java_lang_ArrayIndexOutOfBoundsException(), ss.as_string());
2382 }
2383 JNI_END
2384
2385 DT_VOID_RETURN_MARK_DECL(SetObjectArrayElement
2386 , HOTSPOT_JNI_SETOBJECTARRAYELEMENT_RETURN());
2387
2388 JNI_ENTRY(void, jni_SetObjectArrayElement(JNIEnv *env, jobjectArray array, jsize index, jobject value))
2389 HOTSPOT_JNI_SETOBJECTARRAYELEMENT_ENTRY(env, array, index, value);
2390 DT_VOID_RETURN_MARK(SetObjectArrayElement);
2391
2392 objArrayOop a = oop_cast<objArrayOop>(JNIHandles::resolve_non_null(array));
2393 oop v = JNIHandles::resolve(value);
2394 if (a->is_within_bounds(index)) {
2395 assert(a->klass()->is_refined_objArray_klass(), "must be");
2396 if (v == nullptr || v->is_a(ObjArrayKlass::cast(a->klass())->element_klass())) {
2397 a->obj_at_put(index, v, THREAD);
2398 return;
2399 } else {
2400 ResourceMark rm(THREAD);
2401 stringStream ss;
2402 Klass *bottom_kl = ObjArrayKlass::cast(a->klass())->bottom_klass();
2403 ss.print("type mismatch: can not store %s to %s[%d]",
2404 v->klass()->external_name(),
2405 bottom_kl->is_typeArray_klass() ? type2name_tab[ArrayKlass::cast(bottom_kl)->element_type()] : bottom_kl->external_name(),
2406 index);
2407 for (int dims = ArrayKlass::cast(a->klass())->dimension(); dims > 1; --dims) {
2408 ss.print("[]");
2409 }
2410 THROW_MSG(vmSymbols::java_lang_ArrayStoreException(), ss.as_string());
2411 }
2412 } else {
2413 ResourceMark rm(THREAD);
2414 stringStream ss;
2415 ss.print("Index %d out of bounds for length %d", index, a->length());
2416 THROW_MSG(vmSymbols::java_lang_ArrayIndexOutOfBoundsException(), ss.as_string());
2417 }
2418 JNI_END
2419
2420
2421
2422 #define DEFINE_NEWSCALARARRAY(Return,Allocator,Result \
2423 ,EntryProbe,ReturnProbe) \
2424 \
2425 DT_RETURN_MARK_DECL(New##Result##Array, Return \
2426 , ReturnProbe); \
2427 \
2428 JNI_ENTRY(Return, \
2429 jni_New##Result##Array(JNIEnv *env, jsize len)) \
2430 EntryProbe; \
2431 Return ret = nullptr;\
2432 DT_RETURN_MARK(New##Result##Array, Return, (const Return&)ret);\
2433 \
2434 oop obj= oopFactory::Allocator(len, CHECK_NULL); \
2435 ret = (Return) JNIHandles::make_local(THREAD, obj); \
2436 return ret;\
2437 JNI_END
2438
2439 DEFINE_NEWSCALARARRAY(jbooleanArray, new_boolArray, Boolean,
2440 HOTSPOT_JNI_NEWBOOLEANARRAY_ENTRY(env, len),
2441 HOTSPOT_JNI_NEWBOOLEANARRAY_RETURN(_ret_ref))
2442 DEFINE_NEWSCALARARRAY(jbyteArray, new_byteArray, Byte,
2443 HOTSPOT_JNI_NEWBYTEARRAY_ENTRY(env, len),
2444 HOTSPOT_JNI_NEWBYTEARRAY_RETURN(_ret_ref))
2445 DEFINE_NEWSCALARARRAY(jshortArray, new_shortArray, Short,
2446 HOTSPOT_JNI_NEWSHORTARRAY_ENTRY(env, len),
2447 HOTSPOT_JNI_NEWSHORTARRAY_RETURN(_ret_ref))
2448 DEFINE_NEWSCALARARRAY(jcharArray, new_charArray, Char,
2449 HOTSPOT_JNI_NEWCHARARRAY_ENTRY(env, len),
2450 HOTSPOT_JNI_NEWCHARARRAY_RETURN(_ret_ref))
2451 DEFINE_NEWSCALARARRAY(jintArray, new_intArray, Int,
2452 HOTSPOT_JNI_NEWINTARRAY_ENTRY(env, len),
2453 HOTSPOT_JNI_NEWINTARRAY_RETURN(_ret_ref))
2454 DEFINE_NEWSCALARARRAY(jlongArray, new_longArray, Long,
2455 HOTSPOT_JNI_NEWLONGARRAY_ENTRY(env, len),
2456 HOTSPOT_JNI_NEWLONGARRAY_RETURN(_ret_ref))
2457 DEFINE_NEWSCALARARRAY(jfloatArray, new_floatArray, Float,
2458 HOTSPOT_JNI_NEWFLOATARRAY_ENTRY(env, len),
2459 HOTSPOT_JNI_NEWFLOATARRAY_RETURN(_ret_ref))
2460 DEFINE_NEWSCALARARRAY(jdoubleArray, new_doubleArray, Double,
2461 HOTSPOT_JNI_NEWDOUBLEARRAY_ENTRY(env, len),
2462 HOTSPOT_JNI_NEWDOUBLEARRAY_RETURN(_ret_ref))
2463
2464 // Return an address which will fault if the caller writes to it.
2465
2466 static char* get_bad_address() {
2467 static char* bad_address = nullptr;
2468 if (bad_address == nullptr) {
2469 size_t size = os::vm_allocation_granularity();
2470 bad_address = os::reserve_memory(size, mtInternal);
2471 if (bad_address != nullptr) {
2472 os::protect_memory(bad_address, size, os::MEM_PROT_READ,
2473 /*is_committed*/false);
2474 }
2475 }
2476 return bad_address;
2477 }
2478
2479
2480
2481 #define DEFINE_GETSCALARARRAYELEMENTS(ElementType,Result \
2482 , EntryProbe, ReturnProbe) \
2483 \
2484 JNI_ENTRY_NO_PRESERVE(ElementType*, \
2485 jni_Get##Result##ArrayElements(JNIEnv *env, ElementType##Array array, jboolean *isCopy)) \
2486 EntryProbe; \
2487 /* allocate an chunk of memory in c land */ \
2488 typeArrayOop a = typeArrayOop(JNIHandles::resolve_non_null(array)); \
2489 ElementType* result; \
2490 int len = a->length(); \
2491 if (len == 0) { \
2492 if (isCopy != nullptr) { \
2493 *isCopy = JNI_FALSE; \
2494 } \
2495 /* Empty array: legal but useless, can't return null. \
2496 * Return a pointer to something useless. \
2497 * Avoid asserts in typeArrayOop. */ \
2498 result = (ElementType*)get_bad_address(); \
2499 } else { \
2500 /* JNI Specification states return null on OOM */ \
2501 result = NEW_C_HEAP_ARRAY_RETURN_NULL(ElementType, len, mtInternal); \
2502 if (result != nullptr) { \
2503 /* copy the array to the c chunk */ \
2504 ArrayAccess<>::arraycopy_to_native(a, typeArrayOopDesc::element_offset<ElementType>(0), \
2505 result, len); \
2506 if (isCopy) { \
2507 *isCopy = JNI_TRUE; \
2508 } \
2509 } \
2510 } \
2511 ReturnProbe; \
2512 return result; \
2513 JNI_END
2514
2515 DEFINE_GETSCALARARRAYELEMENTS(jboolean, Boolean
2516 , HOTSPOT_JNI_GETBOOLEANARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy),
2517 HOTSPOT_JNI_GETBOOLEANARRAYELEMENTS_RETURN((uintptr_t*)result))
2518 DEFINE_GETSCALARARRAYELEMENTS(jbyte, Byte
2519 , HOTSPOT_JNI_GETBYTEARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy),
2520 HOTSPOT_JNI_GETBYTEARRAYELEMENTS_RETURN((char*)result))
2521 DEFINE_GETSCALARARRAYELEMENTS(jshort, Short
2522 , HOTSPOT_JNI_GETSHORTARRAYELEMENTS_ENTRY(env, (uint16_t*) array, (uintptr_t *) isCopy),
2523 HOTSPOT_JNI_GETSHORTARRAYELEMENTS_RETURN((uint16_t*)result))
2524 DEFINE_GETSCALARARRAYELEMENTS(jchar, Char
2525 , HOTSPOT_JNI_GETCHARARRAYELEMENTS_ENTRY(env, (uint16_t*) array, (uintptr_t *) isCopy),
2526 HOTSPOT_JNI_GETCHARARRAYELEMENTS_RETURN(result))
2527 DEFINE_GETSCALARARRAYELEMENTS(jint, Int
2528 , HOTSPOT_JNI_GETINTARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy),
2529 HOTSPOT_JNI_GETINTARRAYELEMENTS_RETURN((uint32_t*)result))
2530 DEFINE_GETSCALARARRAYELEMENTS(jlong, Long
2531 , HOTSPOT_JNI_GETLONGARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy),
2532 HOTSPOT_JNI_GETLONGARRAYELEMENTS_RETURN(((uintptr_t*)result)))
2533 // Float and double probes don't return value because dtrace doesn't currently support it
2534 DEFINE_GETSCALARARRAYELEMENTS(jfloat, Float
2535 , HOTSPOT_JNI_GETFLOATARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy),
2536 HOTSPOT_JNI_GETFLOATARRAYELEMENTS_RETURN(result))
2537 DEFINE_GETSCALARARRAYELEMENTS(jdouble, Double
2538 , HOTSPOT_JNI_GETDOUBLEARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy),
2539 HOTSPOT_JNI_GETDOUBLEARRAYELEMENTS_RETURN(result))
2540
2541
2542 #define DEFINE_RELEASESCALARARRAYELEMENTS(ElementType,Result \
2543 , EntryProbe, ReturnProbe) \
2544 \
2545 JNI_ENTRY_NO_PRESERVE(void, \
2546 jni_Release##Result##ArrayElements(JNIEnv *env, ElementType##Array array, \
2547 ElementType *buf, jint mode)) \
2548 EntryProbe; \
2549 typeArrayOop a = typeArrayOop(JNIHandles::resolve_non_null(array)); \
2550 int len = a->length(); \
2551 if (len != 0) { /* Empty array: nothing to free or copy. */ \
2552 if ((mode == 0) || (mode == JNI_COMMIT)) { \
2553 ArrayAccess<>::arraycopy_from_native(buf, a, typeArrayOopDesc::element_offset<ElementType>(0), len); \
2554 } \
2555 if ((mode == 0) || (mode == JNI_ABORT)) { \
2556 FreeHeap(buf); \
2557 } \
2558 } \
2559 ReturnProbe; \
2560 JNI_END
2561
2562 DEFINE_RELEASESCALARARRAYELEMENTS(jboolean, Boolean
2563 , HOTSPOT_JNI_RELEASEBOOLEANARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) buf, mode),
2564 HOTSPOT_JNI_RELEASEBOOLEANARRAYELEMENTS_RETURN())
2565 DEFINE_RELEASESCALARARRAYELEMENTS(jbyte, Byte
2566 , HOTSPOT_JNI_RELEASEBYTEARRAYELEMENTS_ENTRY(env, array, (char *) buf, mode),
2567 HOTSPOT_JNI_RELEASEBYTEARRAYELEMENTS_RETURN())
2568 DEFINE_RELEASESCALARARRAYELEMENTS(jshort, Short
2569 , HOTSPOT_JNI_RELEASESHORTARRAYELEMENTS_ENTRY(env, array, (uint16_t *) buf, mode),
2570 HOTSPOT_JNI_RELEASESHORTARRAYELEMENTS_RETURN())
2571 DEFINE_RELEASESCALARARRAYELEMENTS(jchar, Char
2572 , HOTSPOT_JNI_RELEASECHARARRAYELEMENTS_ENTRY(env, array, (uint16_t *) buf, mode),
2573 HOTSPOT_JNI_RELEASECHARARRAYELEMENTS_RETURN())
2574 DEFINE_RELEASESCALARARRAYELEMENTS(jint, Int
2575 , HOTSPOT_JNI_RELEASEINTARRAYELEMENTS_ENTRY(env, array, (uint32_t *) buf, mode),
2576 HOTSPOT_JNI_RELEASEINTARRAYELEMENTS_RETURN())
2577 DEFINE_RELEASESCALARARRAYELEMENTS(jlong, Long
2578 , HOTSPOT_JNI_RELEASELONGARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) buf, mode),
2579 HOTSPOT_JNI_RELEASELONGARRAYELEMENTS_RETURN())
2580 DEFINE_RELEASESCALARARRAYELEMENTS(jfloat, Float
2581 , HOTSPOT_JNI_RELEASEFLOATARRAYELEMENTS_ENTRY(env, array, (float *) buf, mode),
2582 HOTSPOT_JNI_RELEASEFLOATARRAYELEMENTS_RETURN())
2583 DEFINE_RELEASESCALARARRAYELEMENTS(jdouble, Double
2584 , HOTSPOT_JNI_RELEASEDOUBLEARRAYELEMENTS_ENTRY(env, array, (double *) buf, mode),
2585 HOTSPOT_JNI_RELEASEDOUBLEARRAYELEMENTS_RETURN())
2586
2587 static void check_bounds(jsize start, jsize copy_len, jsize array_len, TRAPS) {
2588 ResourceMark rm(THREAD);
2589 if (copy_len < 0) {
2590 stringStream ss;
2591 ss.print("Length %d is negative", copy_len);
2592 THROW_MSG(vmSymbols::java_lang_ArrayIndexOutOfBoundsException(), ss.as_string());
2593 } else if (start < 0 || (start > array_len - copy_len)) {
2594 stringStream ss;
2595 ss.print("Array region %d.." INT64_FORMAT " out of bounds for length %d",
2596 start, (int64_t)start+(int64_t)copy_len, array_len);
2597 THROW_MSG(vmSymbols::java_lang_ArrayIndexOutOfBoundsException(), ss.as_string());
2598 }
2599 }
2600
2601 #define DEFINE_GETSCALARARRAYREGION(ElementType,Result \
2602 , EntryProbe, ReturnProbe) \
2603 DT_VOID_RETURN_MARK_DECL(Get##Result##ArrayRegion \
2604 , ReturnProbe); \
2605 \
2606 JNI_ENTRY(void, \
2607 jni_Get##Result##ArrayRegion(JNIEnv *env, ElementType##Array array, jsize start, \
2608 jsize len, ElementType *buf)) \
2609 EntryProbe; \
2610 DT_VOID_RETURN_MARK(Get##Result##ArrayRegion); \
2611 typeArrayOop src = typeArrayOop(JNIHandles::resolve_non_null(array)); \
2612 check_bounds(start, len, src->length(), CHECK); \
2613 if (len > 0) { \
2614 ArrayAccess<>::arraycopy_to_native(src, typeArrayOopDesc::element_offset<ElementType>(start), buf, len); \
2615 } \
2616 JNI_END
2617
2618 DEFINE_GETSCALARARRAYREGION(jboolean,Boolean
2619 , HOTSPOT_JNI_GETBOOLEANARRAYREGION_ENTRY(env, array, start, len, (uintptr_t *) buf),
2620 HOTSPOT_JNI_GETBOOLEANARRAYREGION_RETURN());
2621 DEFINE_GETSCALARARRAYREGION(jbyte, Byte
2622 , HOTSPOT_JNI_GETBYTEARRAYREGION_ENTRY(env, array, start, len, (char *) buf),
2623 HOTSPOT_JNI_GETBYTEARRAYREGION_RETURN());
2624 DEFINE_GETSCALARARRAYREGION(jshort, Short
2625 , HOTSPOT_JNI_GETSHORTARRAYREGION_ENTRY(env, array, start, len, (uint16_t *) buf),
2626 HOTSPOT_JNI_GETSHORTARRAYREGION_RETURN());
2627 DEFINE_GETSCALARARRAYREGION(jchar, Char
2628 , HOTSPOT_JNI_GETCHARARRAYREGION_ENTRY(env, array, start, len, (uint16_t*) buf),
2629 HOTSPOT_JNI_GETCHARARRAYREGION_RETURN());
2630 DEFINE_GETSCALARARRAYREGION(jint, Int
2631 , HOTSPOT_JNI_GETINTARRAYREGION_ENTRY(env, array, start, len, (uint32_t*) buf),
2632 HOTSPOT_JNI_GETINTARRAYREGION_RETURN());
2633 DEFINE_GETSCALARARRAYREGION(jlong, Long
2634 , HOTSPOT_JNI_GETLONGARRAYREGION_ENTRY(env, array, start, len, (uintptr_t *) buf),
2635 HOTSPOT_JNI_GETLONGARRAYREGION_RETURN());
2636 DEFINE_GETSCALARARRAYREGION(jfloat, Float
2637 , HOTSPOT_JNI_GETFLOATARRAYREGION_ENTRY(env, array, start, len, (float *) buf),
2638 HOTSPOT_JNI_GETFLOATARRAYREGION_RETURN());
2639 DEFINE_GETSCALARARRAYREGION(jdouble, Double
2640 , HOTSPOT_JNI_GETDOUBLEARRAYREGION_ENTRY(env, array, start, len, (double *) buf),
2641 HOTSPOT_JNI_GETDOUBLEARRAYREGION_RETURN());
2642
2643
2644 #define DEFINE_SETSCALARARRAYREGION(ElementType,Result \
2645 , EntryProbe, ReturnProbe) \
2646 DT_VOID_RETURN_MARK_DECL(Set##Result##ArrayRegion \
2647 ,ReturnProbe); \
2648 \
2649 JNI_ENTRY(void, \
2650 jni_Set##Result##ArrayRegion(JNIEnv *env, ElementType##Array array, jsize start, \
2651 jsize len, const ElementType *buf)) \
2652 EntryProbe; \
2653 DT_VOID_RETURN_MARK(Set##Result##ArrayRegion); \
2654 typeArrayOop dst = typeArrayOop(JNIHandles::resolve_non_null(array)); \
2655 check_bounds(start, len, dst->length(), CHECK); \
2656 if (len > 0) { \
2657 ArrayAccess<>::arraycopy_from_native(buf, dst, typeArrayOopDesc::element_offset<ElementType>(start), len); \
2658 } \
2659 JNI_END
2660
2661 DEFINE_SETSCALARARRAYREGION(jboolean, Boolean
2662 , HOTSPOT_JNI_SETBOOLEANARRAYREGION_ENTRY(env, array, start, len, (uintptr_t *)buf),
2663 HOTSPOT_JNI_SETBOOLEANARRAYREGION_RETURN())
2664 DEFINE_SETSCALARARRAYREGION(jbyte, Byte
2665 , HOTSPOT_JNI_SETBYTEARRAYREGION_ENTRY(env, array, start, len, (char *) buf),
2666 HOTSPOT_JNI_SETBYTEARRAYREGION_RETURN())
2667 DEFINE_SETSCALARARRAYREGION(jshort, Short
2668 , HOTSPOT_JNI_SETSHORTARRAYREGION_ENTRY(env, array, start, len, (uint16_t *) buf),
2669 HOTSPOT_JNI_SETSHORTARRAYREGION_RETURN())
2670 DEFINE_SETSCALARARRAYREGION(jchar, Char
2671 , HOTSPOT_JNI_SETCHARARRAYREGION_ENTRY(env, array, start, len, (uint16_t *) buf),
2672 HOTSPOT_JNI_SETCHARARRAYREGION_RETURN())
2673 DEFINE_SETSCALARARRAYREGION(jint, Int
2674 , HOTSPOT_JNI_SETINTARRAYREGION_ENTRY(env, array, start, len, (uint32_t *) buf),
2675 HOTSPOT_JNI_SETINTARRAYREGION_RETURN())
2676 DEFINE_SETSCALARARRAYREGION(jlong, Long
2677 , HOTSPOT_JNI_SETLONGARRAYREGION_ENTRY(env, array, start, len, (uintptr_t *) buf),
2678 HOTSPOT_JNI_SETLONGARRAYREGION_RETURN())
2679 DEFINE_SETSCALARARRAYREGION(jfloat, Float
2680 , HOTSPOT_JNI_SETFLOATARRAYREGION_ENTRY(env, array, start, len, (float *) buf),
2681 HOTSPOT_JNI_SETFLOATARRAYREGION_RETURN())
2682 DEFINE_SETSCALARARRAYREGION(jdouble, Double
2683 , HOTSPOT_JNI_SETDOUBLEARRAYREGION_ENTRY(env, array, start, len, (double *) buf),
2684 HOTSPOT_JNI_SETDOUBLEARRAYREGION_RETURN())
2685
2686
2687 DT_RETURN_MARK_DECL(RegisterNatives, jint
2688 , HOTSPOT_JNI_REGISTERNATIVES_RETURN(_ret_ref));
2689
2690 JNI_ENTRY(jint, jni_RegisterNatives(JNIEnv *env, jclass clazz,
2691 const JNINativeMethod *methods,
2692 jint nMethods))
2693 HOTSPOT_JNI_REGISTERNATIVES_ENTRY(env, clazz, (void *) methods, nMethods);
2694 jint ret = 0;
2695 DT_RETURN_MARK(RegisterNatives, jint, (const jint&)ret);
2696
2697 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz));
2698
2699 // There are no restrictions on native code registering native methods,
2700 // which allows agents to redefine the bindings to native methods, however
2701 // we issue a warning if any code running outside of the boot/platform
2702 // loader is rebinding any native methods in classes loaded by the
2703 // boot/platform loader that are in named modules. That will catch changes
2704 // to platform classes while excluding classes added to the bootclasspath.
2705 bool do_warning = false;
2706
2707 // Only instanceKlasses can have native methods
2708 if (k->is_instance_klass()) {
2709 oop cl = k->class_loader();
2710 InstanceKlass* ik = InstanceKlass::cast(k);
2711 // Check for a platform class
2712 if ((cl == nullptr || SystemDictionary::is_platform_class_loader(cl)) &&
2713 ik->module()->is_named()) {
2714 Klass* caller = thread->security_get_caller_class(1);
2715 // If no caller class, or caller class has a different loader, then
2716 // issue a warning below.
2717 do_warning = (caller == nullptr) || caller->class_loader() != cl;
2718 }
2719 }
2720
2721
2722 for (int index = 0; index < nMethods; index++) {
2723 const char* meth_name = methods[index].name;
2724 const char* meth_sig = methods[index].signature;
2725 int meth_name_len = (int)strlen(meth_name);
2726
2727 // The class should have been loaded (we have an instance of the class
2728 // passed in) so the method and signature should already be in the symbol
2729 // table. If they're not there, the method doesn't exist.
2730 TempNewSymbol name = SymbolTable::probe(meth_name, meth_name_len);
2731 TempNewSymbol signature = SymbolTable::probe(meth_sig, (int)strlen(meth_sig));
2732
2733 if (name == nullptr || signature == nullptr) {
2734 ResourceMark rm(THREAD);
2735 stringStream st;
2736 st.print("Method %s.%s%s not found", k->external_name(), meth_name, meth_sig);
2737 // Must return negative value on failure
2738 THROW_MSG_(vmSymbols::java_lang_NoSuchMethodError(), st.as_string(), -1);
2739 }
2740
2741 if (do_warning) {
2742 ResourceMark rm(THREAD);
2743 log_warning(jni, resolve)("Re-registering of platform native method: %s.%s%s "
2744 "from code in a different classloader", k->external_name(), meth_name, meth_sig);
2745 }
2746
2747 bool res = Method::register_native(k, name, signature,
2748 (address) methods[index].fnPtr, THREAD);
2749 if (!res) {
2750 ret = -1;
2751 break;
2752 }
2753 }
2754 return ret;
2755 JNI_END
2756
2757
2758 JNI_ENTRY(jint, jni_UnregisterNatives(JNIEnv *env, jclass clazz))
2759 HOTSPOT_JNI_UNREGISTERNATIVES_ENTRY(env, clazz);
2760 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz));
2761 //%note jni_2
2762 if (k->is_instance_klass()) {
2763 for (int index = 0; index < InstanceKlass::cast(k)->methods()->length(); index++) {
2764 Method* m = InstanceKlass::cast(k)->methods()->at(index);
2765 if (m->is_native()) {
2766 m->clear_native_function();
2767 m->set_signature_handler(nullptr);
2768 }
2769 }
2770 }
2771 HOTSPOT_JNI_UNREGISTERNATIVES_RETURN(0);
2772 return 0;
2773 JNI_END
2774
2775 //
2776 // Monitor functions
2777 //
2778
2779 DT_RETURN_MARK_DECL(MonitorEnter, jint
2780 , HOTSPOT_JNI_MONITORENTER_RETURN(_ret_ref));
2781
2782 JNI_ENTRY(jint, jni_MonitorEnter(JNIEnv *env, jobject jobj))
2783 HOTSPOT_JNI_MONITORENTER_ENTRY(env, jobj);
2784 jint ret = JNI_ERR;
2785 DT_RETURN_MARK(MonitorEnter, jint, (const jint&)ret);
2786
2787 // If the object is null, we can't do anything with it
2788 if (jobj == nullptr) {
2789 THROW_(vmSymbols::java_lang_NullPointerException(), JNI_ERR);
2790 }
2791
2792 Handle obj(thread, JNIHandles::resolve_non_null(jobj));
2793 ObjectSynchronizer::jni_enter(obj, CHECK_(JNI_ERR));
2794 return JNI_OK;
2795 JNI_END
2796
2797 DT_RETURN_MARK_DECL(MonitorExit, jint
2798 , HOTSPOT_JNI_MONITOREXIT_RETURN(_ret_ref));
2799
2800 JNI_ENTRY(jint, jni_MonitorExit(JNIEnv *env, jobject jobj))
2801 HOTSPOT_JNI_MONITOREXIT_ENTRY(env, jobj);
2802 jint ret = JNI_ERR;
2803 DT_RETURN_MARK(MonitorExit, jint, (const jint&)ret);
2804
2805 // Don't do anything with a null object
2806 if (jobj == nullptr) {
2807 THROW_(vmSymbols::java_lang_NullPointerException(), JNI_ERR);
2808 }
2809
2810 Handle obj(THREAD, JNIHandles::resolve_non_null(jobj));
2811 ObjectSynchronizer::jni_exit(obj(), CHECK_(JNI_ERR));
2812 return JNI_OK;
2813 JNI_END
2814
2815 //
2816 // Extensions
2817 //
2818
2819 DT_VOID_RETURN_MARK_DECL(GetStringRegion
2820 , HOTSPOT_JNI_GETSTRINGREGION_RETURN());
2821
2822 JNI_ENTRY(void, jni_GetStringRegion(JNIEnv *env, jstring string, jsize start, jsize len, jchar *buf))
2823 HOTSPOT_JNI_GETSTRINGREGION_ENTRY(env, string, start, len, buf);
2824 DT_VOID_RETURN_MARK(GetStringRegion);
2825 oop s = JNIHandles::resolve_non_null(string);
2826 typeArrayOop s_value = java_lang_String::value(s);
2827 int s_len = java_lang_String::length(s, s_value);
2828 if (start < 0 || len < 0 || start > s_len - len) {
2829 THROW(vmSymbols::java_lang_StringIndexOutOfBoundsException());
2830 } else {
2831 if (len > 0) {
2832 bool is_latin1 = java_lang_String::is_latin1(s);
2833 if (!is_latin1) {
2834 ArrayAccess<>::arraycopy_to_native(s_value, typeArrayOopDesc::element_offset<jchar>(start),
2835 buf, len);
2836 } else {
2837 for (int i = 0; i < len; i++) {
2838 buf[i] = ((jchar) s_value->byte_at(i + start)) & 0xff;
2839 }
2840 }
2841 }
2842 }
2843 JNI_END
2844
2845 DT_VOID_RETURN_MARK_DECL(GetStringUTFRegion
2846 , HOTSPOT_JNI_GETSTRINGUTFREGION_RETURN());
2847
2848 JNI_ENTRY(void, jni_GetStringUTFRegion(JNIEnv *env, jstring string, jsize start, jsize len, char *buf))
2849 HOTSPOT_JNI_GETSTRINGUTFREGION_ENTRY(env, string, start, len, buf);
2850 DT_VOID_RETURN_MARK(GetStringUTFRegion);
2851 oop s = JNIHandles::resolve_non_null(string);
2852 typeArrayOop s_value = java_lang_String::value(s);
2853 int s_len = java_lang_String::length(s, s_value);
2854 if (start < 0 || len < 0 || start > s_len - len) {
2855 THROW(vmSymbols::java_lang_StringIndexOutOfBoundsException());
2856 } else {
2857 //%note jni_7
2858 if (len > 0) {
2859 // Assume the buffer is large enough as the JNI spec. does not require user error checking
2860 java_lang_String::as_utf8_string(s, s_value, start, len, buf, INT_MAX);
2861 // as_utf8_string null-terminates the result string
2862 } else {
2863 // JDK null-terminates the buffer even in len is zero
2864 if (buf != nullptr) {
2865 buf[0] = 0;
2866 }
2867 }
2868 }
2869 JNI_END
2870
2871 JNI_ENTRY(void*, jni_GetPrimitiveArrayCritical(JNIEnv *env, jarray array, jboolean *isCopy))
2872 HOTSPOT_JNI_GETPRIMITIVEARRAYCRITICAL_ENTRY(env, array, (uintptr_t *) isCopy);
2873 Handle a(thread, JNIHandles::resolve_non_null(array));
2874 assert(a->is_typeArray(), "just checking");
2875
2876 // Pin object
2877 Universe::heap()->pin_object(thread, a());
2878
2879 BasicType type = TypeArrayKlass::cast(a->klass())->element_type();
2880 void* ret = arrayOop(a())->base(type);
2881 if (isCopy != nullptr) {
2882 *isCopy = JNI_FALSE;
2883 }
2884 HOTSPOT_JNI_GETPRIMITIVEARRAYCRITICAL_RETURN(ret);
2885 return ret;
2886 JNI_END
2887
2888
2889 JNI_ENTRY(void, jni_ReleasePrimitiveArrayCritical(JNIEnv *env, jarray array, void *carray, jint mode))
2890 HOTSPOT_JNI_RELEASEPRIMITIVEARRAYCRITICAL_ENTRY(env, array, carray, mode);
2891 // Unpin object
2892 Universe::heap()->unpin_object(thread, JNIHandles::resolve_non_null(array));
2893 HOTSPOT_JNI_RELEASEPRIMITIVEARRAYCRITICAL_RETURN();
2894 JNI_END
2895
2896
2897 JNI_ENTRY(const jchar*, jni_GetStringCritical(JNIEnv *env, jstring string, jboolean *isCopy))
2898 HOTSPOT_JNI_GETSTRINGCRITICAL_ENTRY(env, string, (uintptr_t *) isCopy);
2899 oop s = JNIHandles::resolve_non_null(string);
2900 jchar* ret;
2901 if (!java_lang_String::is_latin1(s)) {
2902 typeArrayHandle s_value(thread, java_lang_String::value(s));
2903
2904 // Pin value array
2905 Universe::heap()->pin_object(thread, s_value());
2906
2907 ret = (jchar*) s_value->base(T_CHAR);
2908 if (isCopy != nullptr) *isCopy = JNI_FALSE;
2909 } else {
2910 // Inflate latin1 encoded string to UTF16
2911 typeArrayOop s_value = java_lang_String::value(s);
2912 int s_len = java_lang_String::length(s, s_value);
2913 ret = NEW_C_HEAP_ARRAY_RETURN_NULL(jchar, s_len + 1, mtInternal); // add one for zero termination
2914 /* JNI Specification states return null on OOM */
2915 if (ret != nullptr) {
2916 for (int i = 0; i < s_len; i++) {
2917 ret[i] = ((jchar) s_value->byte_at(i)) & 0xff;
2918 }
2919 ret[s_len] = 0;
2920 }
2921 if (isCopy != nullptr) *isCopy = JNI_TRUE;
2922 }
2923 HOTSPOT_JNI_GETSTRINGCRITICAL_RETURN((uint16_t *) ret);
2924 return ret;
2925 JNI_END
2926
2927
2928 JNI_ENTRY(void, jni_ReleaseStringCritical(JNIEnv *env, jstring str, const jchar *chars))
2929 HOTSPOT_JNI_RELEASESTRINGCRITICAL_ENTRY(env, str, (uint16_t *) chars);
2930 oop s = JNIHandles::resolve_non_null(str);
2931 bool is_latin1 = java_lang_String::is_latin1(s);
2932
2933 if (is_latin1) {
2934 // For latin1 string, free jchar array allocated by earlier call to GetStringCritical.
2935 // This assumes that ReleaseStringCritical bookends GetStringCritical.
2936 FREE_C_HEAP_ARRAY(chars);
2937 } else {
2938 // StringDedup can have replaced the value array, so don't fetch the array from 's'.
2939 // Instead, we calculate the address based on the jchar array exposed with GetStringCritical.
2940 oop value = cast_to_oop((address)chars - arrayOopDesc::base_offset_in_bytes(T_CHAR));
2941
2942 // Unpin value array
2943 Universe::heap()->unpin_object(thread, value);
2944 }
2945 HOTSPOT_JNI_RELEASESTRINGCRITICAL_RETURN();
2946 JNI_END
2947
2948
2949 JNI_ENTRY(jweak, jni_NewWeakGlobalRef(JNIEnv *env, jobject ref))
2950 HOTSPOT_JNI_NEWWEAKGLOBALREF_ENTRY(env, ref);
2951 Handle ref_handle(thread, JNIHandles::resolve(ref));
2952
2953 if (!ref_handle.is_null() && ref_handle->klass()->is_inline_klass()) {
2954 ResourceMark rm(THREAD);
2955 stringStream ss;
2956 ss.print("%s is not an identity class", ref_handle->klass()->external_name());
2957 THROW_MSG_(vmSymbols::java_lang_IdentityException(), ss.as_string(), nullptr);
2958 }
2959
2960 jweak ret = JNIHandles::make_weak_global(ref_handle, AllocFailStrategy::RETURN_NULL);
2961 if (ret == nullptr && ref_handle.not_null()) {
2962 THROW_OOP_(Universe::out_of_memory_error_c_heap(), nullptr);
2963 }
2964 HOTSPOT_JNI_NEWWEAKGLOBALREF_RETURN(ret);
2965 return ret;
2966 JNI_END
2967
2968 // Must be JNI_ENTRY (with HandleMark)
2969 JNI_ENTRY(void, jni_DeleteWeakGlobalRef(JNIEnv *env, jweak ref))
2970 HOTSPOT_JNI_DELETEWEAKGLOBALREF_ENTRY(env, ref);
2971 JNIHandles::destroy_weak_global(ref);
2972 HOTSPOT_JNI_DELETEWEAKGLOBALREF_RETURN();
2973 JNI_END
2974
2975
2976 JNI_ENTRY_NO_PRESERVE(jboolean, jni_ExceptionCheck(JNIEnv *env))
2977 HOTSPOT_JNI_EXCEPTIONCHECK_ENTRY(env);
2978 jni_check_async_exceptions(thread);
2979 jboolean ret = (thread->has_pending_exception()) ? JNI_TRUE : JNI_FALSE;
2980 HOTSPOT_JNI_EXCEPTIONCHECK_RETURN(ret);
2981 return ret;
2982 JNI_END
2983
2984
2985 // Initialization state for three routines below relating to
2986 // java.nio.DirectBuffers
2987 static int directBufferSupportInitializeStarted = 0;
2988 static volatile int directBufferSupportInitializeEnded = 0;
2989 static volatile int directBufferSupportInitializeFailed = 0;
2990 static jclass bufferClass = nullptr;
2991 static jclass directBufferClass = nullptr;
2992 static jclass directByteBufferClass = nullptr;
2993 static jmethodID directByteBufferConstructor = nullptr;
2994 static jfieldID directBufferAddressField = nullptr;
2995 static jfieldID bufferCapacityField = nullptr;
2996
2997 static jclass lookupOne(JNIEnv* env, const char* name, TRAPS) {
2998 Handle loader; // null (bootstrap) loader
2999
3000 TempNewSymbol sym = SymbolTable::new_symbol(name);
3001 jclass result = find_class_from_class_loader(env, sym, true, loader, true, CHECK_NULL);
3002
3003 if (log_is_enabled(Debug, class, resolve) && result != nullptr) {
3004 trace_class_resolution(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(result)));
3005 }
3006 return result;
3007 }
3008
3009 // These lookups are done with the null (bootstrap) ClassLoader to
3010 // circumvent any security checks that would be done by jni_FindClass.
3011 JNI_ENTRY(bool, lookupDirectBufferClasses(JNIEnv* env))
3012 {
3013 if ((bufferClass = lookupOne(env, "java/nio/Buffer", thread)) == nullptr) { return false; }
3014 if ((directBufferClass = lookupOne(env, "sun/nio/ch/DirectBuffer", thread)) == nullptr) { return false; }
3015 if ((directByteBufferClass = lookupOne(env, "java/nio/DirectByteBuffer", thread)) == nullptr) { return false; }
3016 return true;
3017 }
3018 JNI_END
3019
3020
3021 static bool initializeDirectBufferSupport(JNIEnv* env, JavaThread* thread) {
3022 if (directBufferSupportInitializeFailed) {
3023 return false;
3024 }
3025
3026 if (AtomicAccess::cmpxchg(&directBufferSupportInitializeStarted, 0, 1) == 0) {
3027 if (!lookupDirectBufferClasses(env)) {
3028 directBufferSupportInitializeFailed = 1;
3029 return false;
3030 }
3031
3032 // Make global references for these
3033 bufferClass = (jclass) env->NewGlobalRef(bufferClass);
3034 directBufferClass = (jclass) env->NewGlobalRef(directBufferClass);
3035 directByteBufferClass = (jclass) env->NewGlobalRef(directByteBufferClass);
3036
3037 // Global refs will be null if out-of-memory (no exception is pending)
3038 if (bufferClass == nullptr || directBufferClass == nullptr || directByteBufferClass == nullptr) {
3039 directBufferSupportInitializeFailed = 1;
3040 return false;
3041 }
3042
3043 // Get needed field and method IDs
3044 directByteBufferConstructor = env->GetMethodID(directByteBufferClass, "<init>", "(JJ)V");
3045 if (env->ExceptionCheck()) {
3046 env->ExceptionClear();
3047 directBufferSupportInitializeFailed = 1;
3048 return false;
3049 }
3050 directBufferAddressField = env->GetFieldID(bufferClass, "address", "J");
3051 if (env->ExceptionCheck()) {
3052 env->ExceptionClear();
3053 directBufferSupportInitializeFailed = 1;
3054 return false;
3055 }
3056 bufferCapacityField = env->GetFieldID(bufferClass, "capacity", "I");
3057 if (env->ExceptionCheck()) {
3058 env->ExceptionClear();
3059 directBufferSupportInitializeFailed = 1;
3060 return false;
3061 }
3062
3063 if ((directByteBufferConstructor == nullptr) ||
3064 (directBufferAddressField == nullptr) ||
3065 (bufferCapacityField == nullptr)) {
3066 directBufferSupportInitializeFailed = 1;
3067 return false;
3068 }
3069
3070 directBufferSupportInitializeEnded = 1;
3071 } else {
3072 while (!directBufferSupportInitializeEnded && !directBufferSupportInitializeFailed) {
3073 os::naked_yield();
3074 }
3075 }
3076
3077 return !directBufferSupportInitializeFailed;
3078 }
3079
3080 extern "C" jobject JNICALL jni_NewDirectByteBuffer(JNIEnv *env, void* address, jlong capacity)
3081 {
3082 // thread_from_jni_environment() will block if VM is gone.
3083 JavaThread* thread = JavaThread::thread_from_jni_environment(env);
3084
3085 HOTSPOT_JNI_NEWDIRECTBYTEBUFFER_ENTRY(env, address, capacity);
3086
3087 if (!directBufferSupportInitializeEnded) {
3088 if (!initializeDirectBufferSupport(env, thread)) {
3089 HOTSPOT_JNI_NEWDIRECTBYTEBUFFER_RETURN(nullptr);
3090 return nullptr;
3091 }
3092 }
3093
3094 // Being paranoid about accidental sign extension on address
3095 jlong addr = (jlong) ((uintptr_t) address);
3096 jobject ret = env->NewObject(directByteBufferClass, directByteBufferConstructor, addr, capacity);
3097 HOTSPOT_JNI_NEWDIRECTBYTEBUFFER_RETURN(ret);
3098 return ret;
3099 }
3100
3101 DT_RETURN_MARK_DECL(GetDirectBufferAddress, void*
3102 , HOTSPOT_JNI_GETDIRECTBUFFERADDRESS_RETURN((void*) _ret_ref));
3103
3104 extern "C" void* JNICALL jni_GetDirectBufferAddress(JNIEnv *env, jobject buf)
3105 {
3106 // thread_from_jni_environment() will block if VM is gone.
3107 JavaThread* thread = JavaThread::thread_from_jni_environment(env);
3108
3109 HOTSPOT_JNI_GETDIRECTBUFFERADDRESS_ENTRY(env, buf);
3110 void* ret = nullptr;
3111 DT_RETURN_MARK(GetDirectBufferAddress, void*, (const void*&)ret);
3112
3113 if (!directBufferSupportInitializeEnded) {
3114 if (!initializeDirectBufferSupport(env, thread)) {
3115 return nullptr;
3116 }
3117 }
3118
3119 if ((buf != nullptr) && (!env->IsInstanceOf(buf, directBufferClass))) {
3120 return nullptr;
3121 }
3122
3123 ret = (void*)(intptr_t)env->GetLongField(buf, directBufferAddressField);
3124 return ret;
3125 }
3126
3127 DT_RETURN_MARK_DECL(GetDirectBufferCapacity, jlong
3128 , HOTSPOT_JNI_GETDIRECTBUFFERCAPACITY_RETURN(_ret_ref));
3129
3130 extern "C" jlong JNICALL jni_GetDirectBufferCapacity(JNIEnv *env, jobject buf)
3131 {
3132 // thread_from_jni_environment() will block if VM is gone.
3133 JavaThread* thread = JavaThread::thread_from_jni_environment(env);
3134
3135 HOTSPOT_JNI_GETDIRECTBUFFERCAPACITY_ENTRY(env, buf);
3136 jlong ret = -1;
3137 DT_RETURN_MARK(GetDirectBufferCapacity, jlong, (const jlong&)ret);
3138
3139 if (!directBufferSupportInitializeEnded) {
3140 if (!initializeDirectBufferSupport(env, thread)) {
3141 ret = 0;
3142 return ret;
3143 }
3144 }
3145
3146 if (buf == nullptr) {
3147 return -1;
3148 }
3149
3150 if (!env->IsInstanceOf(buf, directBufferClass)) {
3151 return -1;
3152 }
3153
3154 // NOTE that capacity is currently an int in the implementation
3155 ret = env->GetIntField(buf, bufferCapacityField);
3156 return ret;
3157 }
3158
3159
3160 JNI_LEAF(jint, jni_GetVersion(JNIEnv *env))
3161 HOTSPOT_JNI_GETVERSION_ENTRY(env);
3162 HOTSPOT_JNI_GETVERSION_RETURN(CurrentVersion);
3163 return CurrentVersion;
3164 JNI_END
3165
3166 extern struct JavaVM_ main_vm;
3167
3168 JNI_LEAF(jint, jni_GetJavaVM(JNIEnv *env, JavaVM **vm))
3169 HOTSPOT_JNI_GETJAVAVM_ENTRY(env, (void **) vm);
3170 *vm = (JavaVM *)(&main_vm);
3171 HOTSPOT_JNI_GETJAVAVM_RETURN(JNI_OK);
3172 return JNI_OK;
3173 JNI_END
3174
3175
3176 JNI_ENTRY(jobject, jni_GetModule(JNIEnv* env, jclass clazz))
3177 HOTSPOT_JNI_GETMODULE_ENTRY(env, clazz);
3178 jobject ret = Modules::get_module(clazz, THREAD);
3179 HOTSPOT_JNI_GETMODULE_RETURN(ret);
3180 return ret;
3181 JNI_END
3182
3183 JNI_ENTRY(jboolean, jni_IsVirtualThread(JNIEnv* env, jobject obj))
3184 HOTSPOT_JNI_ISVIRTUALTHREAD_ENTRY(env, obj);
3185 jboolean ret = JNI_FALSE;
3186 oop thread_obj = JNIHandles::resolve_external_guard(obj);
3187 if (thread_obj != nullptr && thread_obj->is_a(vmClasses::BaseVirtualThread_klass())) {
3188 ret = JNI_TRUE;
3189 }
3190 HOTSPOT_JNI_ISVIRTUALTHREAD_RETURN(ret);
3191 return ret;
3192 JNI_END
3193
3194 JNI_ENTRY(jboolean, jni_IsValueObject(JNIEnv* env, jobject obj))
3195 HOTSPOT_JNI_ISVALUEOBJECT_ENTRY(env, obj);
3196 oop o = JNIHandles::resolve(obj);
3197 if (o != nullptr && o->klass()->is_inline_klass()) {
3198 HOTSPOT_JNI_ISVALUEOBJECT_RETURN(JNI_TRUE);
3199 return JNI_TRUE;
3200 } else {
3201 HOTSPOT_JNI_ISVALUEOBJECT_RETURN(JNI_FALSE);
3202 return JNI_FALSE;
3203 }
3204 JNI_END
3205
3206 // Structure containing all jni functions
3207 struct JNINativeInterface_ jni_NativeInterface = {
3208 nullptr,
3209 nullptr,
3210 nullptr,
3211
3212 nullptr,
3213
3214 jni_GetVersion,
3215
3216 jni_DefineClass,
3217 jni_FindClass,
3218
3219 jni_FromReflectedMethod,
3220 jni_FromReflectedField,
3221
3222 jni_ToReflectedMethod,
3223
3224 jni_GetSuperclass,
3225 jni_IsAssignableFrom,
3226
3227 jni_ToReflectedField,
3228
3229 jni_Throw,
3230 jni_ThrowNew,
3231 jni_ExceptionOccurred,
3232 jni_ExceptionDescribe,
3233 jni_ExceptionClear,
3234 jni_FatalError,
3235
3236 jni_PushLocalFrame,
3237 jni_PopLocalFrame,
3238
3239 jni_NewGlobalRef,
3240 jni_DeleteGlobalRef,
3241 jni_DeleteLocalRef,
3242 jni_IsSameObject,
3243
3244 jni_NewLocalRef,
3245 jni_EnsureLocalCapacity,
3246
3247 jni_AllocObject,
3248 jni_NewObject,
3249 jni_NewObjectV,
3250 jni_NewObjectA,
3251
3252 jni_GetObjectClass,
3253 jni_IsInstanceOf,
3254
3255 jni_GetMethodID,
3256
3257 jni_CallObjectMethod,
3258 jni_CallObjectMethodV,
3259 jni_CallObjectMethodA,
3260 jni_CallBooleanMethod,
3261 jni_CallBooleanMethodV,
3262 jni_CallBooleanMethodA,
3263 jni_CallByteMethod,
3264 jni_CallByteMethodV,
3265 jni_CallByteMethodA,
3266 jni_CallCharMethod,
3267 jni_CallCharMethodV,
3268 jni_CallCharMethodA,
3269 jni_CallShortMethod,
3270 jni_CallShortMethodV,
3271 jni_CallShortMethodA,
3272 jni_CallIntMethod,
3273 jni_CallIntMethodV,
3274 jni_CallIntMethodA,
3275 jni_CallLongMethod,
3276 jni_CallLongMethodV,
3277 jni_CallLongMethodA,
3278 jni_CallFloatMethod,
3279 jni_CallFloatMethodV,
3280 jni_CallFloatMethodA,
3281 jni_CallDoubleMethod,
3282 jni_CallDoubleMethodV,
3283 jni_CallDoubleMethodA,
3284 jni_CallVoidMethod,
3285 jni_CallVoidMethodV,
3286 jni_CallVoidMethodA,
3287
3288 jni_CallNonvirtualObjectMethod,
3289 jni_CallNonvirtualObjectMethodV,
3290 jni_CallNonvirtualObjectMethodA,
3291 jni_CallNonvirtualBooleanMethod,
3292 jni_CallNonvirtualBooleanMethodV,
3293 jni_CallNonvirtualBooleanMethodA,
3294 jni_CallNonvirtualByteMethod,
3295 jni_CallNonvirtualByteMethodV,
3296 jni_CallNonvirtualByteMethodA,
3297 jni_CallNonvirtualCharMethod,
3298 jni_CallNonvirtualCharMethodV,
3299 jni_CallNonvirtualCharMethodA,
3300 jni_CallNonvirtualShortMethod,
3301 jni_CallNonvirtualShortMethodV,
3302 jni_CallNonvirtualShortMethodA,
3303 jni_CallNonvirtualIntMethod,
3304 jni_CallNonvirtualIntMethodV,
3305 jni_CallNonvirtualIntMethodA,
3306 jni_CallNonvirtualLongMethod,
3307 jni_CallNonvirtualLongMethodV,
3308 jni_CallNonvirtualLongMethodA,
3309 jni_CallNonvirtualFloatMethod,
3310 jni_CallNonvirtualFloatMethodV,
3311 jni_CallNonvirtualFloatMethodA,
3312 jni_CallNonvirtualDoubleMethod,
3313 jni_CallNonvirtualDoubleMethodV,
3314 jni_CallNonvirtualDoubleMethodA,
3315 jni_CallNonvirtualVoidMethod,
3316 jni_CallNonvirtualVoidMethodV,
3317 jni_CallNonvirtualVoidMethodA,
3318
3319 jni_GetFieldID,
3320
3321 jni_GetObjectField,
3322 jni_GetBooleanField,
3323 jni_GetByteField,
3324 jni_GetCharField,
3325 jni_GetShortField,
3326 jni_GetIntField,
3327 jni_GetLongField,
3328 jni_GetFloatField,
3329 jni_GetDoubleField,
3330
3331 jni_SetObjectField,
3332 jni_SetBooleanField,
3333 jni_SetByteField,
3334 jni_SetCharField,
3335 jni_SetShortField,
3336 jni_SetIntField,
3337 jni_SetLongField,
3338 jni_SetFloatField,
3339 jni_SetDoubleField,
3340
3341 jni_GetStaticMethodID,
3342
3343 jni_CallStaticObjectMethod,
3344 jni_CallStaticObjectMethodV,
3345 jni_CallStaticObjectMethodA,
3346 jni_CallStaticBooleanMethod,
3347 jni_CallStaticBooleanMethodV,
3348 jni_CallStaticBooleanMethodA,
3349 jni_CallStaticByteMethod,
3350 jni_CallStaticByteMethodV,
3351 jni_CallStaticByteMethodA,
3352 jni_CallStaticCharMethod,
3353 jni_CallStaticCharMethodV,
3354 jni_CallStaticCharMethodA,
3355 jni_CallStaticShortMethod,
3356 jni_CallStaticShortMethodV,
3357 jni_CallStaticShortMethodA,
3358 jni_CallStaticIntMethod,
3359 jni_CallStaticIntMethodV,
3360 jni_CallStaticIntMethodA,
3361 jni_CallStaticLongMethod,
3362 jni_CallStaticLongMethodV,
3363 jni_CallStaticLongMethodA,
3364 jni_CallStaticFloatMethod,
3365 jni_CallStaticFloatMethodV,
3366 jni_CallStaticFloatMethodA,
3367 jni_CallStaticDoubleMethod,
3368 jni_CallStaticDoubleMethodV,
3369 jni_CallStaticDoubleMethodA,
3370 jni_CallStaticVoidMethod,
3371 jni_CallStaticVoidMethodV,
3372 jni_CallStaticVoidMethodA,
3373
3374 jni_GetStaticFieldID,
3375
3376 jni_GetStaticObjectField,
3377 jni_GetStaticBooleanField,
3378 jni_GetStaticByteField,
3379 jni_GetStaticCharField,
3380 jni_GetStaticShortField,
3381 jni_GetStaticIntField,
3382 jni_GetStaticLongField,
3383 jni_GetStaticFloatField,
3384 jni_GetStaticDoubleField,
3385
3386 jni_SetStaticObjectField,
3387 jni_SetStaticBooleanField,
3388 jni_SetStaticByteField,
3389 jni_SetStaticCharField,
3390 jni_SetStaticShortField,
3391 jni_SetStaticIntField,
3392 jni_SetStaticLongField,
3393 jni_SetStaticFloatField,
3394 jni_SetStaticDoubleField,
3395
3396 jni_NewString,
3397 jni_GetStringLength,
3398 jni_GetStringChars,
3399 jni_ReleaseStringChars,
3400
3401 jni_NewStringUTF,
3402 jni_GetStringUTFLength,
3403 jni_GetStringUTFChars,
3404 jni_ReleaseStringUTFChars,
3405
3406 jni_GetArrayLength,
3407
3408 jni_NewObjectArray,
3409 jni_GetObjectArrayElement,
3410 jni_SetObjectArrayElement,
3411
3412 jni_NewBooleanArray,
3413 jni_NewByteArray,
3414 jni_NewCharArray,
3415 jni_NewShortArray,
3416 jni_NewIntArray,
3417 jni_NewLongArray,
3418 jni_NewFloatArray,
3419 jni_NewDoubleArray,
3420
3421 jni_GetBooleanArrayElements,
3422 jni_GetByteArrayElements,
3423 jni_GetCharArrayElements,
3424 jni_GetShortArrayElements,
3425 jni_GetIntArrayElements,
3426 jni_GetLongArrayElements,
3427 jni_GetFloatArrayElements,
3428 jni_GetDoubleArrayElements,
3429
3430 jni_ReleaseBooleanArrayElements,
3431 jni_ReleaseByteArrayElements,
3432 jni_ReleaseCharArrayElements,
3433 jni_ReleaseShortArrayElements,
3434 jni_ReleaseIntArrayElements,
3435 jni_ReleaseLongArrayElements,
3436 jni_ReleaseFloatArrayElements,
3437 jni_ReleaseDoubleArrayElements,
3438
3439 jni_GetBooleanArrayRegion,
3440 jni_GetByteArrayRegion,
3441 jni_GetCharArrayRegion,
3442 jni_GetShortArrayRegion,
3443 jni_GetIntArrayRegion,
3444 jni_GetLongArrayRegion,
3445 jni_GetFloatArrayRegion,
3446 jni_GetDoubleArrayRegion,
3447
3448 jni_SetBooleanArrayRegion,
3449 jni_SetByteArrayRegion,
3450 jni_SetCharArrayRegion,
3451 jni_SetShortArrayRegion,
3452 jni_SetIntArrayRegion,
3453 jni_SetLongArrayRegion,
3454 jni_SetFloatArrayRegion,
3455 jni_SetDoubleArrayRegion,
3456
3457 jni_RegisterNatives,
3458 jni_UnregisterNatives,
3459
3460 jni_MonitorEnter,
3461 jni_MonitorExit,
3462
3463 jni_GetJavaVM,
3464
3465 jni_GetStringRegion,
3466 jni_GetStringUTFRegion,
3467
3468 jni_GetPrimitiveArrayCritical,
3469 jni_ReleasePrimitiveArrayCritical,
3470
3471 jni_GetStringCritical,
3472 jni_ReleaseStringCritical,
3473
3474 jni_NewWeakGlobalRef,
3475 jni_DeleteWeakGlobalRef,
3476
3477 jni_ExceptionCheck,
3478
3479 jni_NewDirectByteBuffer,
3480 jni_GetDirectBufferAddress,
3481 jni_GetDirectBufferCapacity,
3482
3483 // New 1_6 features
3484
3485 jni_GetObjectRefType,
3486
3487 // Module features
3488
3489 jni_GetModule,
3490
3491 // Virtual threads
3492
3493 jni_IsVirtualThread,
3494
3495 // Large UTF8 support
3496
3497 jni_GetStringUTFLengthAsLong,
3498
3499 // Value classes
3500
3501 jni_IsValueObject
3502 };
3503
3504
3505 // For jvmti use to modify jni function table.
3506 // Java threads in native contiues to run until it is transitioned
3507 // to VM at safepoint. Before the transition or before it is blocked
3508 // for safepoint it may access jni function table. VM could crash if
3509 // any java thread access the jni function table in the middle of memcpy.
3510 // To avoid this each function pointers are copied automically.
3511 void copy_jni_function_table(const struct JNINativeInterface_ *new_jni_NativeInterface) {
3512 assert(SafepointSynchronize::is_at_safepoint(), "must be at safepoint");
3513 intptr_t *a = (intptr_t *) jni_functions();
3514 intptr_t *b = (intptr_t *) new_jni_NativeInterface;
3515 for (uint i=0; i < sizeof(struct JNINativeInterface_)/sizeof(void *); i++) {
3516 AtomicAccess::store(a++, *b++);
3517 }
3518 }
3519
3520 void quicken_jni_functions() {
3521 // Replace Get<Primitive>Field with fast versions
3522 if (UseFastJNIAccessors && !VerifyJNIFields && !CheckJNICalls) {
3523 address func;
3524 func = JNI_FastGetField::generate_fast_get_boolean_field();
3525 if (func != (address)-1) {
3526 jni_NativeInterface.GetBooleanField = (GetBooleanField_t)func;
3527 }
3528 func = JNI_FastGetField::generate_fast_get_byte_field();
3529 if (func != (address)-1) {
3530 jni_NativeInterface.GetByteField = (GetByteField_t)func;
3531 }
3532 func = JNI_FastGetField::generate_fast_get_char_field();
3533 if (func != (address)-1) {
3534 jni_NativeInterface.GetCharField = (GetCharField_t)func;
3535 }
3536 func = JNI_FastGetField::generate_fast_get_short_field();
3537 if (func != (address)-1) {
3538 jni_NativeInterface.GetShortField = (GetShortField_t)func;
3539 }
3540 func = JNI_FastGetField::generate_fast_get_int_field();
3541 if (func != (address)-1) {
3542 jni_NativeInterface.GetIntField = (GetIntField_t)func;
3543 }
3544 func = JNI_FastGetField::generate_fast_get_long_field();
3545 if (func != (address)-1) {
3546 jni_NativeInterface.GetLongField = (GetLongField_t)func;
3547 }
3548 func = JNI_FastGetField::generate_fast_get_float_field();
3549 if (func != (address)-1) {
3550 jni_NativeInterface.GetFloatField = (GetFloatField_t)func;
3551 }
3552 func = JNI_FastGetField::generate_fast_get_double_field();
3553 if (func != (address)-1) {
3554 jni_NativeInterface.GetDoubleField = (GetDoubleField_t)func;
3555 }
3556 }
3557 }
3558
3559 // Returns the function structure
3560 struct JNINativeInterface_* jni_functions() {
3561 #if INCLUDE_JNI_CHECK
3562 if (CheckJNICalls) return jni_functions_check();
3563 #endif // INCLUDE_JNI_CHECK
3564 return &jni_NativeInterface;
3565 }
3566
3567 // Returns the function structure
3568 struct JNINativeInterface_* jni_functions_nocheck() {
3569 return &jni_NativeInterface;
3570 }
3571
3572
3573 // Invocation API
3574
3575
3576 // Forward declaration
3577 extern const struct JNIInvokeInterface_ jni_InvokeInterface;
3578
3579 // Global invocation API vars
3580 enum VM_Creation_State {
3581 NOT_CREATED = 0,
3582 IN_PROGRESS, // Most JNI operations are permitted during this phase to
3583 // allow for initialization actions by libraries and agents.
3584 COMPLETE
3585 };
3586
3587 volatile VM_Creation_State vm_created = NOT_CREATED;
3588
3589 bool is_vm_created() {
3590 return AtomicAccess::load(&vm_created) == COMPLETE;
3591 }
3592
3593 // Indicate whether it is safe to recreate VM. Recreation is only
3594 // possible after a failed initial creation attempt in some cases.
3595 volatile int safe_to_recreate_vm = 1;
3596 struct JavaVM_ main_vm = {&jni_InvokeInterface};
3597
3598
3599 #define JAVASTACKSIZE (400 * 1024) /* Default size of a thread java stack */
3600 enum { VERIFY_NONE, VERIFY_REMOTE, VERIFY_ALL };
3601
3602 DT_RETURN_MARK_DECL(GetDefaultJavaVMInitArgs, jint
3603 , HOTSPOT_JNI_GETDEFAULTJAVAVMINITARGS_RETURN(_ret_ref));
3604
3605 _JNI_IMPORT_OR_EXPORT_ jint JNICALL JNI_GetDefaultJavaVMInitArgs(void *args_) {
3606 HOTSPOT_JNI_GETDEFAULTJAVAVMINITARGS_ENTRY(args_);
3607 JDK1_1InitArgs *args = (JDK1_1InitArgs *)args_;
3608 jint ret = JNI_ERR;
3609 DT_RETURN_MARK(GetDefaultJavaVMInitArgs, jint, (const jint&)ret);
3610
3611 if (Threads::is_supported_jni_version(args->version)) {
3612 ret = JNI_OK;
3613 }
3614 // 1.1 style no longer supported in hotspot.
3615 // According the JNI spec, we should update args->version on return.
3616 // We also use the structure to communicate with launcher about default
3617 // stack size.
3618 if (args->version == JNI_VERSION_1_1) {
3619 args->version = JNI_VERSION_1_2;
3620 // javaStackSize is int in arguments structure
3621 assert(jlong(ThreadStackSize) * K < INT_MAX, "integer overflow");
3622 args->javaStackSize = (jint)(ThreadStackSize * K);
3623 }
3624 return ret;
3625 }
3626
3627 DT_RETURN_MARK_DECL(CreateJavaVM, jint
3628 , HOTSPOT_JNI_CREATEJAVAVM_RETURN(_ret_ref));
3629
3630 static jint JNI_CreateJavaVM_inner(JavaVM **vm, void **penv, void *args) {
3631 HOTSPOT_JNI_CREATEJAVAVM_ENTRY((void **) vm, penv, args);
3632
3633 jint result = JNI_ERR;
3634 DT_RETURN_MARK(CreateJavaVM, jint, (const jint&)result);
3635
3636 // We're about to use AtomicAccess::xchg for synchronization. Some Zero
3637 // platforms use the GCC builtin __sync_lock_test_and_set for this,
3638 // but __sync_lock_test_and_set is not guaranteed to do what we want
3639 // on all architectures. So we check it works before relying on it.
3640 #if defined(ZERO) && defined(ASSERT)
3641 {
3642 jint a = 0xcafebabe;
3643 jint b = AtomicAccess::xchg(&a, (jint) 0xdeadbeef);
3644 void *c = &a;
3645 void *d = AtomicAccess::xchg(&c, &b);
3646 assert(a == (jint) 0xdeadbeef && b == (jint) 0xcafebabe, "AtomicAccess::xchg() works");
3647 assert(c == &b && d == &a, "AtomicAccess::xchg() works");
3648 }
3649 #endif // ZERO && ASSERT
3650
3651 // At the moment it's only possible to have one Java VM,
3652 // since some of the runtime state is in global variables.
3653
3654 // We cannot use our mutex locks here, since they only work on
3655 // Threads. We do an atomic compare and exchange to ensure only
3656 // one thread can call this method at a time
3657
3658 // We use AtomicAccess::xchg rather than AtomicAccess::add/dec since on some platforms
3659 // the add/dec implementations are dependent on whether we are running
3660 // on a multiprocessor AtomicAccess::xchg does not have this problem.
3661 if (AtomicAccess::xchg(&vm_created, IN_PROGRESS) != NOT_CREATED) {
3662 return JNI_EEXIST; // already created, or create attempt in progress
3663 }
3664
3665 // If a previous creation attempt failed but can be retried safely,
3666 // then safe_to_recreate_vm will have been reset to 1 after being
3667 // cleared here. If a previous creation attempt succeeded and we then
3668 // destroyed that VM, we will be prevented from trying to recreate
3669 // the VM in the same process, as the value will still be 0.
3670 if (AtomicAccess::xchg(&safe_to_recreate_vm, 0) == 0) {
3671 return JNI_ERR;
3672 }
3673
3674 /**
3675 * Certain errors during initialization are recoverable and do not
3676 * prevent this method from being called again at a later time
3677 * (perhaps with different arguments). However, at a certain
3678 * point during initialization if an error occurs we cannot allow
3679 * this function to be called again (or it will crash). In those
3680 * situations, the 'canTryAgain' flag is set to false, which atomically
3681 * sets safe_to_recreate_vm to 1, such that any new call to
3682 * JNI_CreateJavaVM will immediately fail using the above logic.
3683 */
3684 bool can_try_again = true;
3685
3686 result = Threads::create_vm((JavaVMInitArgs*) args, &can_try_again);
3687 if (result == JNI_OK) {
3688 JavaThread *thread = JavaThread::current();
3689 assert(!thread->has_pending_exception(), "should have returned not OK");
3690 // thread is thread_in_vm here
3691 *vm = (JavaVM *)(&main_vm);
3692 *(JNIEnv**)penv = thread->jni_environment();
3693 // mark creation complete for other JNI ops
3694 AtomicAccess::release_store(&vm_created, COMPLETE);
3695
3696 #if INCLUDE_JVMCI
3697 if (EnableJVMCI) {
3698 if (UseJVMCICompiler) {
3699 // JVMCI is initialized on a CompilerThread
3700 if (BootstrapJVMCI) {
3701 JavaThread* THREAD = thread; // For exception macros.
3702 JVMCICompiler* compiler = JVMCICompiler::instance(true, CATCH);
3703 compiler->bootstrap(THREAD);
3704 if (HAS_PENDING_EXCEPTION) {
3705 HandleMark hm(THREAD);
3706 vm_exit_during_initialization(Handle(THREAD, PENDING_EXCEPTION));
3707 }
3708 }
3709 }
3710 }
3711 #endif
3712
3713 // Notify JVMTI
3714 if (JvmtiExport::should_post_thread_life()) {
3715 JvmtiExport::post_thread_start(thread);
3716 }
3717
3718 JFR_ONLY(Jfr::on_thread_start(thread);)
3719
3720 if (ReplayCompiles) ciReplay::replay(thread);
3721
3722 #ifdef ASSERT
3723 // Some platforms (like Win*) need a wrapper around these test
3724 // functions in order to properly handle error conditions.
3725 if (ErrorHandlerTest != 0) {
3726 VMError::controlled_crash(ErrorHandlerTest);
3727 }
3728 #endif
3729
3730 // Since this is not a JVM_ENTRY we have to set the thread state manually before leaving.
3731 ThreadStateTransition::transition_from_vm(thread, _thread_in_native);
3732 MACOS_AARCH64_ONLY(thread->enable_wx(WXExec));
3733 } else {
3734 // If create_vm exits because of a pending exception, exit with that
3735 // exception. In the future when we figure out how to reclaim memory,
3736 // we may be able to exit with JNI_ERR and allow the calling application
3737 // to continue.
3738 if (Universe::is_fully_initialized()) {
3739 // otherwise no pending exception possible - VM will already have aborted
3740 Thread* current = Thread::current_or_null();
3741 if (current != nullptr) {
3742 JavaThread* THREAD = JavaThread::cast(current); // For exception macros.
3743 assert(HAS_PENDING_EXCEPTION, "must be - else no current thread exists");
3744 HandleMark hm(THREAD);
3745 vm_exit_during_initialization(Handle(THREAD, PENDING_EXCEPTION));
3746 }
3747 }
3748
3749 if (can_try_again) {
3750 // reset safe_to_recreate_vm to 1 so that retrial would be possible
3751 safe_to_recreate_vm = 1;
3752 }
3753
3754 // Creation failed. We must reset vm_created
3755 *vm = nullptr;
3756 *(JNIEnv**)penv = nullptr;
3757 // reset vm_created last to avoid race condition. Use OrderAccess to
3758 // control both compiler and architectural-based reordering.
3759 assert(vm_created == IN_PROGRESS, "must be");
3760 AtomicAccess::release_store(&vm_created, NOT_CREATED);
3761 }
3762
3763 // Flush stdout and stderr before exit.
3764 fflush(stdout);
3765 fflush(stderr);
3766
3767 return result;
3768
3769 }
3770
3771 _JNI_IMPORT_OR_EXPORT_ jint JNICALL JNI_CreateJavaVM(JavaVM **vm, void **penv, void *args) {
3772 jint result = JNI_ERR;
3773 // On Windows, let CreateJavaVM run with SEH protection
3774 #if defined(_WIN32) && !defined(USE_VECTORED_EXCEPTION_HANDLING)
3775 __try {
3776 #endif
3777 result = JNI_CreateJavaVM_inner(vm, penv, args);
3778 #if defined(_WIN32) && !defined(USE_VECTORED_EXCEPTION_HANDLING)
3779 } __except(topLevelExceptionFilter((_EXCEPTION_POINTERS*)_exception_info())) {
3780 // Nothing to do.
3781 }
3782 #endif
3783 return result;
3784 }
3785
3786 _JNI_IMPORT_OR_EXPORT_ jint JNICALL JNI_GetCreatedJavaVMs(JavaVM **vm_buf, jsize bufLen, jsize *numVMs) {
3787 HOTSPOT_JNI_GETCREATEDJAVAVMS_ENTRY((void **) vm_buf, bufLen, (uintptr_t *) numVMs);
3788
3789 if (vm_created == COMPLETE) {
3790 if (numVMs != nullptr) *numVMs = 1;
3791 if (bufLen > 0) *vm_buf = (JavaVM *)(&main_vm);
3792 } else {
3793 if (numVMs != nullptr) *numVMs = 0;
3794 }
3795 HOTSPOT_JNI_GETCREATEDJAVAVMS_RETURN(JNI_OK);
3796 return JNI_OK;
3797 }
3798
3799 extern "C" {
3800
3801 DT_RETURN_MARK_DECL(DestroyJavaVM, jint
3802 , HOTSPOT_JNI_DESTROYJAVAVM_RETURN(_ret_ref));
3803
3804 static jint JNICALL jni_DestroyJavaVM_inner(JavaVM *vm) {
3805 HOTSPOT_JNI_DESTROYJAVAVM_ENTRY(vm);
3806 jint res = JNI_ERR;
3807 DT_RETURN_MARK(DestroyJavaVM, jint, (const jint&)res);
3808
3809 if (vm_created == NOT_CREATED) {
3810 res = JNI_ERR;
3811 return res;
3812 }
3813
3814 JNIEnv *env;
3815 JavaVMAttachArgs destroyargs;
3816 destroyargs.version = CurrentVersion;
3817 destroyargs.name = (char *)"DestroyJavaVM";
3818 destroyargs.group = nullptr;
3819 res = vm->AttachCurrentThread((void **)&env, (void *)&destroyargs);
3820 if (res != JNI_OK) {
3821 return res;
3822 }
3823
3824 JavaThread* thread = JavaThread::current();
3825
3826 // Make sure we are actually in a newly attached thread, with no
3827 // existing Java frame.
3828 if (thread->has_last_Java_frame()) {
3829 return JNI_ERR;
3830 }
3831
3832 // Since this is not a JVM_ENTRY we have to set the thread state manually before entering.
3833
3834 // We are going to VM, change W^X state to the expected one.
3835 MACOS_AARCH64_ONLY(WXMode oldmode = thread->enable_wx(WXWrite));
3836
3837 ThreadStateTransition::transition_from_native(thread, _thread_in_vm);
3838 Threads::destroy_vm();
3839 // Don't bother restoring thread state, VM is gone.
3840 vm_created = NOT_CREATED;
3841 return JNI_OK;
3842 }
3843
3844 jint JNICALL jni_DestroyJavaVM(JavaVM *vm) {
3845 jint result = JNI_ERR;
3846 // On Windows, we need SEH protection
3847 #if defined(_WIN32) && !defined(USE_VECTORED_EXCEPTION_HANDLING)
3848 __try {
3849 #endif
3850 result = jni_DestroyJavaVM_inner(vm);
3851 #if defined(_WIN32) && !defined(USE_VECTORED_EXCEPTION_HANDLING)
3852 } __except(topLevelExceptionFilter((_EXCEPTION_POINTERS*)_exception_info())) {
3853 // Nothing to do.
3854 }
3855 #endif
3856 return result;
3857 }
3858
3859 static jint attach_current_thread(JavaVM *vm, void **penv, void *_args, bool daemon) {
3860 JavaVMAttachArgs *args = (JavaVMAttachArgs *) _args;
3861
3862 // Check below commented out from JDK1.2fcs as well
3863 /*
3864 if (args && (args->version != JNI_VERSION_1_1 || args->version != JNI_VERSION_1_2)) {
3865 return JNI_EVERSION;
3866 }
3867 */
3868
3869 Thread* t = Thread::current_or_null();
3870 if (t != nullptr) {
3871 // If executing from an atexit hook we may be in the VMThread.
3872 if (t->is_Java_thread()) {
3873 // If the thread has been attached this operation is a no-op
3874 *(JNIEnv**)penv = JavaThread::cast(t)->jni_environment();
3875 return JNI_OK;
3876 } else {
3877 return JNI_ERR;
3878 }
3879 }
3880
3881 // Create a thread and mark it as attaching so it will be skipped by the
3882 // ThreadsListEnumerator - see CR 6404306
3883 JavaThread* thread = JavaThread::create_attaching_thread();
3884
3885 // Set correct safepoint info. The thread is going to call into Java when
3886 // initializing the Java level thread object. Hence, the correct state must
3887 // be set in order for the Safepoint code to deal with it correctly.
3888 thread->set_thread_state(_thread_in_vm);
3889 thread->record_stack_base_and_size();
3890 thread->initialize_thread_current();
3891 thread->register_thread_stack_with_NMT();
3892 MACOS_AARCH64_ONLY(thread->init_wx());
3893
3894 if (!os::create_attached_thread(thread)) {
3895 thread->unregister_thread_stack_with_NMT();
3896 thread->smr_delete();
3897 return JNI_ERR;
3898 }
3899 // Enable stack overflow checks
3900 thread->stack_overflow_state()->create_stack_guard_pages();
3901
3902 thread->initialize_tlab();
3903
3904 thread->cache_global_variables();
3905
3906 // Set the _monitor_owner_id to the next thread_id temporarily while initialization runs.
3907 // Do it now before we make this thread visible in Threads::add().
3908 thread->set_monitor_owner_id(ThreadIdentifier::next());
3909
3910 // This thread will not do a safepoint check, since it has
3911 // not been added to the Thread list yet.
3912 { MutexLocker ml(Threads_lock);
3913 // This must be inside this lock in order to get FullGCALot to work properly, i.e., to
3914 // avoid this thread trying to do a GC before it is added to the thread-list
3915 thread->set_active_handles(JNIHandleBlock::allocate_block());
3916 Threads::add(thread, daemon);
3917 }
3918 // Create thread group and name info from attach arguments
3919 oop group = nullptr;
3920 char* thread_name = nullptr;
3921 if (args != nullptr && Threads::is_supported_jni_version(args->version)) {
3922 group = JNIHandles::resolve(args->group);
3923 thread_name = args->name; // may be null
3924 }
3925 if (group == nullptr) group = Universe::main_thread_group();
3926
3927 // Create Java level thread object and attach it to this thread
3928 bool attach_failed = false;
3929 {
3930 EXCEPTION_MARK;
3931 HandleMark hm(THREAD);
3932 Handle thread_group(THREAD, group);
3933 thread->allocate_threadObj(thread_group, thread_name, daemon, THREAD);
3934 if (HAS_PENDING_EXCEPTION) {
3935 CLEAR_PENDING_EXCEPTION;
3936 // cleanup outside the handle mark.
3937 attach_failed = true;
3938 }
3939 }
3940
3941 if (attach_failed) {
3942 // Added missing cleanup
3943 thread->cleanup_failed_attach_current_thread(daemon);
3944 thread->unregister_thread_stack_with_NMT();
3945 thread->smr_delete();
3946 return JNI_ERR;
3947 }
3948
3949 // Update the _monitor_owner_id with the tid value.
3950 thread->set_monitor_owner_id(java_lang_Thread::thread_id(thread->threadObj()));
3951
3952 // Want this inside 'attaching via jni'.
3953 JFR_ONLY(Jfr::on_thread_start(thread);)
3954
3955 // mark the thread as no longer attaching
3956 // this uses a fence to push the change through so we don't have
3957 // to regrab the threads_lock
3958 thread->set_done_attaching_via_jni();
3959
3960 // Set java thread status.
3961 java_lang_Thread::set_thread_status(thread->threadObj(),
3962 JavaThreadStatus::RUNNABLE);
3963
3964 // Notify the debugger
3965 if (JvmtiExport::should_post_thread_life()) {
3966 JvmtiExport::post_thread_start(thread);
3967 }
3968
3969 *(JNIEnv**)penv = thread->jni_environment();
3970
3971 // Now leaving the VM, so change thread_state. This is normally automatically taken care
3972 // of in the JVM_ENTRY. But in this situation we have to do it manually.
3973 ThreadStateTransition::transition_from_vm(thread, _thread_in_native);
3974 MACOS_AARCH64_ONLY(thread->enable_wx(WXExec));
3975
3976 // Perform any platform dependent FPU setup
3977 os::setup_fpu();
3978
3979 return JNI_OK;
3980 }
3981
3982
3983 jint JNICALL jni_AttachCurrentThread(JavaVM *vm, void **penv, void *_args) {
3984 HOTSPOT_JNI_ATTACHCURRENTTHREAD_ENTRY(vm, penv, _args);
3985 if (vm_created == NOT_CREATED) {
3986 // Not sure how we could possibly get here.
3987 HOTSPOT_JNI_ATTACHCURRENTTHREAD_RETURN((uint32_t) JNI_ERR);
3988 return JNI_ERR;
3989 }
3990
3991 jint ret = attach_current_thread(vm, penv, _args, false);
3992 HOTSPOT_JNI_ATTACHCURRENTTHREAD_RETURN(ret);
3993 return ret;
3994 }
3995
3996
3997 jint JNICALL jni_DetachCurrentThread(JavaVM *vm) {
3998 HOTSPOT_JNI_DETACHCURRENTTHREAD_ENTRY(vm);
3999 if (vm_created == NOT_CREATED) {
4000 // Not sure how we could possibly get here.
4001 HOTSPOT_JNI_DETACHCURRENTTHREAD_RETURN(JNI_ERR);
4002 return JNI_ERR;
4003 }
4004
4005 Thread* current = Thread::current_or_null();
4006
4007 // If the thread has already been detached the operation is a no-op
4008 if (current == nullptr) {
4009 HOTSPOT_JNI_DETACHCURRENTTHREAD_RETURN(JNI_OK);
4010 return JNI_OK;
4011 }
4012
4013 // If executing from an atexit hook we may be in the VMThread.
4014 if (!current->is_Java_thread()) {
4015 HOTSPOT_JNI_DETACHCURRENTTHREAD_RETURN((uint32_t) JNI_ERR);
4016 return JNI_ERR;
4017 }
4018
4019 VM_Exit::block_if_vm_exited();
4020
4021 JavaThread* thread = JavaThread::cast(current);
4022 if (thread->has_last_Java_frame()) {
4023 HOTSPOT_JNI_DETACHCURRENTTHREAD_RETURN((uint32_t) JNI_ERR);
4024 // Can't detach a thread that's running java, that can't work.
4025 return JNI_ERR;
4026 }
4027
4028 // We are going to VM, change W^X state to the expected one.
4029 MACOS_AARCH64_ONLY(thread->enable_wx(WXWrite));
4030
4031 // Safepoint support. Have to do call-back to safepoint code, if in the
4032 // middle of a safepoint operation
4033 ThreadStateTransition::transition_from_native(thread, _thread_in_vm);
4034
4035 // XXX: Note that JavaThread::exit() call below removes the guards on the
4036 // stack pages set up via enable_stack_{red,yellow}_zone() calls
4037 // above in jni_AttachCurrentThread. Unfortunately, while the setting
4038 // of the guards is visible in jni_AttachCurrentThread above,
4039 // the removal of the guards is buried below in JavaThread::exit()
4040 // here. The abstraction should be more symmetrically either exposed
4041 // or hidden (e.g. it could probably be hidden in the same
4042 // (platform-dependent) methods where we do alternate stack
4043 // maintenance work?)
4044 thread->exit(false, JavaThread::jni_detach);
4045 thread->unregister_thread_stack_with_NMT();
4046 thread->smr_delete();
4047
4048 // Go to the execute mode, the initial state of the thread on creation.
4049 // Use os interface as the thread is not a JavaThread anymore.
4050 MACOS_AARCH64_ONLY(os::current_thread_enable_wx(WXExec));
4051
4052 HOTSPOT_JNI_DETACHCURRENTTHREAD_RETURN(JNI_OK);
4053 return JNI_OK;
4054 }
4055
4056 DT_RETURN_MARK_DECL(GetEnv, jint
4057 , HOTSPOT_JNI_GETENV_RETURN(_ret_ref));
4058
4059 jint JNICALL jni_GetEnv(JavaVM *vm, void **penv, jint version) {
4060 HOTSPOT_JNI_GETENV_ENTRY(vm, penv, version);
4061 jint ret = JNI_ERR;
4062 DT_RETURN_MARK(GetEnv, jint, (const jint&)ret);
4063
4064 if (vm_created == NOT_CREATED) {
4065 *penv = nullptr;
4066 ret = JNI_EDETACHED;
4067 return ret;
4068 }
4069
4070 if (JniExportedInterface::GetExportedInterface(vm, penv, version, &ret)) {
4071 return ret;
4072 }
4073
4074 #ifndef JVMPI_VERSION_1
4075 // need these in order to be polite about older agents
4076 #define JVMPI_VERSION_1 ((jint)0x10000001)
4077 #define JVMPI_VERSION_1_1 ((jint)0x10000002)
4078 #define JVMPI_VERSION_1_2 ((jint)0x10000003)
4079 #endif // !JVMPI_VERSION_1
4080
4081 Thread* thread = Thread::current_or_null();
4082 if (thread != nullptr && thread->is_Java_thread()) {
4083 if (Threads::is_supported_jni_version_including_1_1(version)) {
4084 *(JNIEnv**)penv = JavaThread::cast(thread)->jni_environment();
4085 ret = JNI_OK;
4086 return ret;
4087
4088 } else if (version == JVMPI_VERSION_1 ||
4089 version == JVMPI_VERSION_1_1 ||
4090 version == JVMPI_VERSION_1_2) {
4091 tty->print_cr("ERROR: JVMPI, an experimental interface, is no longer supported.");
4092 tty->print_cr("Please use the supported interface: the JVM Tool Interface (JVM TI).");
4093 ret = JNI_EVERSION;
4094 return ret;
4095 } else if (JvmtiExport::is_jvmdi_version(version)) {
4096 tty->print_cr("FATAL ERROR: JVMDI is no longer supported.");
4097 tty->print_cr("Please use the supported interface: the JVM Tool Interface (JVM TI).");
4098 ret = JNI_EVERSION;
4099 return ret;
4100 } else {
4101 *penv = nullptr;
4102 ret = JNI_EVERSION;
4103 return ret;
4104 }
4105 } else {
4106 *penv = nullptr;
4107 ret = JNI_EDETACHED;
4108 return ret;
4109 }
4110 }
4111
4112
4113 jint JNICALL jni_AttachCurrentThreadAsDaemon(JavaVM *vm, void **penv, void *_args) {
4114 HOTSPOT_JNI_ATTACHCURRENTTHREADASDAEMON_ENTRY(vm, penv, _args);
4115 if (vm_created == NOT_CREATED) {
4116 // Not sure how we could possibly get here.
4117 HOTSPOT_JNI_ATTACHCURRENTTHREADASDAEMON_RETURN((uint32_t) JNI_ERR);
4118 return JNI_ERR;
4119 }
4120
4121 jint ret = attach_current_thread(vm, penv, _args, true);
4122 HOTSPOT_JNI_ATTACHCURRENTTHREADASDAEMON_RETURN(ret);
4123 return ret;
4124 }
4125
4126
4127 } // End extern "C"
4128
4129 const struct JNIInvokeInterface_ jni_InvokeInterface = {
4130 nullptr,
4131 nullptr,
4132 nullptr,
4133
4134 jni_DestroyJavaVM,
4135 jni_AttachCurrentThread,
4136 jni_DetachCurrentThread,
4137 jni_GetEnv,
4138 jni_AttachCurrentThreadAsDaemon
4139 };