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