1 /*
2 * Copyright (c) 1997, 2023, Oracle and/or its affiliates. All rights reserved.
3 * Copyright (c) 2012 Red Hat, Inc.
4 * Copyright (c) 2021, Azul Systems, Inc. All rights reserved.
5 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
6 *
7 * This code is free software; you can redistribute it and/or modify it
8 * under the terms of the GNU General Public License version 2 only, as
9 * published by the Free Software Foundation.
10 *
11 * This code is distributed in the hope that it will be useful, but WITHOUT
12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
14 * version 2 for more details (a copy is included in the LICENSE file that
15 * accompanied this code).
16 *
17 * You should have received a copy of the GNU General Public License version
18 * 2 along with this work; if not, write to the Free Software Foundation,
19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20 *
21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
22 * or visit www.oracle.com if you need additional information or have any
23 * questions.
24 *
25 */
26
27 #include "precompiled.hpp"
28 #include "ci/ciReplay.hpp"
29 #include "classfile/altHashing.hpp"
30 #include "classfile/classFileStream.hpp"
31 #include "classfile/classLoader.hpp"
32 #include "classfile/classLoadInfo.hpp"
33 #include "classfile/javaClasses.hpp"
34 #include "classfile/javaClasses.inline.hpp"
35 #include "classfile/javaThreadStatus.hpp"
36 #include "classfile/moduleEntry.hpp"
37 #include "classfile/modules.hpp"
38 #include "classfile/symbolTable.hpp"
39 #include "classfile/systemDictionary.hpp"
40 #include "classfile/vmClasses.hpp"
41 #include "classfile/vmSymbols.hpp"
42 #include "compiler/compiler_globals.hpp"
43 #include "gc/shared/collectedHeap.hpp"
44 #include "gc/shared/gcLocker.inline.hpp"
45 #include "gc/shared/stringdedup/stringDedup.hpp"
46 #include "interpreter/linkResolver.hpp"
47 #include "jni.h"
48 #include "jvm.h"
49 #include "logging/log.hpp"
50 #include "memory/allocation.hpp"
51 #include "memory/allocation.inline.hpp"
52 #include "memory/oopFactory.hpp"
53 #include "memory/resourceArea.hpp"
54 #include "memory/universe.hpp"
55 #include "nmt/memTracker.hpp"
56 #include "oops/access.inline.hpp"
57 #include "oops/arrayOop.hpp"
58 #include "oops/flatArrayOop.inline.hpp"
59 #include "oops/inlineKlass.inline.hpp"
60 #include "oops/instanceKlass.inline.hpp"
61 #include "oops/instanceOop.hpp"
62 #include "oops/klass.inline.hpp"
63 #include "oops/markWord.hpp"
64 #include "oops/method.hpp"
65 #include "oops/objArrayKlass.hpp"
66 #include "oops/objArrayOop.inline.hpp"
67 #include "oops/oop.inline.hpp"
68 #include "oops/symbol.hpp"
69 #include "oops/typeArrayKlass.hpp"
70 #include "oops/typeArrayOop.inline.hpp"
71 #include "prims/jniCheck.hpp"
72 #include "prims/jniExport.hpp"
73 #include "prims/jniFastGetField.hpp"
74 #include "prims/jvm_misc.hpp"
75 #include "prims/jvmtiExport.hpp"
76 #include "prims/jvmtiThreadState.hpp"
77 #include "runtime/arguments.hpp"
78 #include "runtime/atomic.hpp"
79 #include "runtime/fieldDescriptor.inline.hpp"
80 #include "runtime/handles.inline.hpp"
81 #include "runtime/interfaceSupport.inline.hpp"
82 #include "runtime/java.hpp"
83 #include "runtime/javaCalls.hpp"
84 #include "runtime/javaThread.inline.hpp"
85 #include "runtime/jfieldIDWorkaround.hpp"
86 #include "runtime/jniHandles.inline.hpp"
87 #include "runtime/reflection.hpp"
88 #include "runtime/safepointVerifiers.hpp"
89 #include "runtime/sharedRuntime.hpp"
90 #include "runtime/signature.hpp"
91 #include "runtime/synchronizer.hpp"
92 #include "runtime/thread.inline.hpp"
93 #include "runtime/vmOperations.hpp"
94 #include "services/runtimeService.hpp"
95 #include "utilities/defaultStream.hpp"
96 #include "utilities/dtrace.hpp"
97 #include "utilities/events.hpp"
98 #include "utilities/macros.hpp"
99 #include "utilities/vmError.hpp"
100 #if INCLUDE_JVMCI
101 #include "jvmci/jvmciCompiler.hpp"
102 #endif
103 #if INCLUDE_JFR
104 #include "jfr/jfr.hpp"
105 #endif
106
107 static jint CurrentVersion = JNI_VERSION_21;
108
109 #if defined(_WIN32) && !defined(USE_VECTORED_EXCEPTION_HANDLING)
110 extern LONG WINAPI topLevelExceptionFilter(_EXCEPTION_POINTERS* );
111 #endif
112
113 // The DT_RETURN_MARK macros create a scoped object to fire the dtrace
114 // '-return' probe regardless of the return path is taken out of the function.
115 // Methods that have multiple return paths use this to avoid having to
116 // instrument each return path. Methods that use CHECK or THROW must use this
117 // since those macros can cause an immediate uninstrumented return.
118 //
119 // In order to get the return value, a reference to the variable containing
120 // the return value must be passed to the constructor of the object, and
121 // the return value must be set before return (since the mark object has
122 // a reference to it).
123 //
124 // Example:
125 // DT_RETURN_MARK_DECL(SomeFunc, int);
126 // JNI_ENTRY(int, SomeFunc, ...)
127 // int return_value = 0;
128 // DT_RETURN_MARK(SomeFunc, int, (const int&)return_value);
129 // foo(CHECK_0)
130 // return_value = 5;
131 // return return_value;
132 // JNI_END
133 #define DT_RETURN_MARK_DECL(name, type, probe) \
134 DTRACE_ONLY( \
135 class DTraceReturnProbeMark_##name { \
136 public: \
137 const type& _ret_ref; \
138 DTraceReturnProbeMark_##name(const type& v) : _ret_ref(v) {} \
139 ~DTraceReturnProbeMark_##name() { \
140 probe; \
141 } \
142 } \
143 )
144 // Void functions are simpler since there's no return value
145 #define DT_VOID_RETURN_MARK_DECL(name, probe) \
146 DTRACE_ONLY( \
147 class DTraceReturnProbeMark_##name { \
148 public: \
149 ~DTraceReturnProbeMark_##name() { \
150 probe; \
151 } \
152 } \
153 )
154
155 // Place these macros in the function to mark the return. Non-void
156 // functions need the type and address of the return value.
157 #define DT_RETURN_MARK(name, type, ref) \
158 DTRACE_ONLY( DTraceReturnProbeMark_##name dtrace_return_mark(ref) )
159 #define DT_VOID_RETURN_MARK(name) \
160 DTRACE_ONLY( DTraceReturnProbeMark_##name dtrace_return_mark )
161
162
163 // Use these to select distinct code for floating-point vs. non-floating point
164 // situations. Used from within common macros where we need slightly
165 // different behavior for Float/Double
166 #define FP_SELECT_Boolean(intcode, fpcode) intcode
167 #define FP_SELECT_Byte(intcode, fpcode) intcode
168 #define FP_SELECT_Char(intcode, fpcode) intcode
169 #define FP_SELECT_Short(intcode, fpcode) intcode
170 #define FP_SELECT_Object(intcode, fpcode) intcode
171 #define FP_SELECT_Int(intcode, fpcode) intcode
172 #define FP_SELECT_Long(intcode, fpcode) intcode
173 #define FP_SELECT_Float(intcode, fpcode) fpcode
174 #define FP_SELECT_Double(intcode, fpcode) fpcode
175 #define FP_SELECT(TypeName, intcode, fpcode) \
176 FP_SELECT_##TypeName(intcode, fpcode)
177
178 // Choose DT_RETURN_MARK macros based on the type: float/double -> void
179 // (dtrace doesn't do FP yet)
180 #define DT_RETURN_MARK_DECL_FOR(TypeName, name, type, probe) \
181 FP_SELECT(TypeName, \
182 DT_RETURN_MARK_DECL(name, type, probe), DT_VOID_RETURN_MARK_DECL(name, probe) )
183 #define DT_RETURN_MARK_FOR(TypeName, name, type, ref) \
184 FP_SELECT(TypeName, \
185 DT_RETURN_MARK(name, type, ref), DT_VOID_RETURN_MARK(name) )
186
187
188 // out-of-line helpers for class jfieldIDWorkaround:
189
190 bool jfieldIDWorkaround::is_valid_jfieldID(Klass* k, jfieldID id) {
191 if (jfieldIDWorkaround::is_instance_jfieldID(k, id)) {
192 uintptr_t as_uint = (uintptr_t) id;
193 int offset = raw_instance_offset(id);
194 if (is_checked_jfieldID(id)) {
195 if (!klass_hash_ok(k, id)) {
196 return false;
197 }
198 }
199 return InstanceKlass::cast(k)->contains_field_offset(offset);
200 } else {
201 JNIid* result = (JNIid*) id;
202 #ifdef ASSERT
203 return result != nullptr && result->is_static_field_id();
204 #else
205 return result != nullptr;
206 #endif
207 }
208 }
209
210
211 intptr_t jfieldIDWorkaround::encode_klass_hash(Klass* k, int offset) {
212 if (offset <= small_offset_mask) {
213 Klass* field_klass = k;
214 Klass* super_klass = field_klass->super();
215 // With compressed oops the most super class with nonstatic fields would
216 // be the owner of fields embedded in the header.
217 while (InstanceKlass::cast(super_klass)->has_nonstatic_fields() &&
218 InstanceKlass::cast(super_klass)->contains_field_offset(offset)) {
219 field_klass = super_klass; // super contains the field also
220 super_klass = field_klass->super();
221 }
222 debug_only(NoSafepointVerifier nosafepoint;)
223 uintptr_t klass_hash = field_klass->identity_hash();
224 return ((klass_hash & klass_mask) << klass_shift) | checked_mask_in_place;
225 } else {
226 #if 0
227 #ifndef PRODUCT
228 {
229 ResourceMark rm;
230 warning("VerifyJNIFields: long offset %d in %s", offset, k->external_name());
231 }
232 #endif
233 #endif
234 return 0;
235 }
236 }
237
238 bool jfieldIDWorkaround::klass_hash_ok(Klass* k, jfieldID id) {
239 uintptr_t as_uint = (uintptr_t) id;
240 intptr_t klass_hash = (as_uint >> klass_shift) & klass_mask;
241 do {
242 debug_only(NoSafepointVerifier nosafepoint;)
243 // Could use a non-blocking query for identity_hash here...
244 if ((k->identity_hash() & klass_mask) == klass_hash)
245 return true;
246 k = k->super();
247 } while (k != nullptr);
248 return false;
249 }
250
251 void jfieldIDWorkaround::verify_instance_jfieldID(Klass* k, jfieldID id) {
252 guarantee(jfieldIDWorkaround::is_instance_jfieldID(k, id), "must be an instance field" );
253 uintptr_t as_uint = (uintptr_t) id;
254 int offset = raw_instance_offset(id);
255 if (VerifyJNIFields) {
256 if (is_checked_jfieldID(id)) {
257 guarantee(klass_hash_ok(k, id),
258 "Bug in native code: jfieldID class must match object");
259 } else {
260 #if 0
261 #ifndef PRODUCT
262 if (Verbose) {
263 ResourceMark rm;
264 warning("VerifyJNIFields: unverified offset %d for %s", offset, k->external_name());
265 }
266 #endif
267 #endif
268 }
269 }
270 guarantee(InstanceKlass::cast(k)->contains_field_offset(offset),
271 "Bug in native code: jfieldID offset must address interior of object");
272 }
273
274 // Implementation of JNI entries
275
276 DT_RETURN_MARK_DECL(DefineClass, jclass
277 , HOTSPOT_JNI_DEFINECLASS_RETURN(_ret_ref));
278
279 JNI_ENTRY(jclass, jni_DefineClass(JNIEnv *env, const char *name, jobject loaderRef,
280 const jbyte *buf, jsize bufLen))
281 HOTSPOT_JNI_DEFINECLASS_ENTRY(
282 env, (char*) name, loaderRef, (char*) buf, bufLen);
283
284 jclass cls = nullptr;
285 DT_RETURN_MARK(DefineClass, jclass, (const jclass&)cls);
286
287 // Class resolution will get the class name from the .class stream if the name is null.
288 TempNewSymbol class_name = name == nullptr ? nullptr :
289 SystemDictionary::class_name_symbol(name, vmSymbols::java_lang_NoClassDefFoundError(),
290 CHECK_NULL);
291
292 ResourceMark rm(THREAD);
293 ClassFileStream st((u1*)buf, bufLen, nullptr, ClassFileStream::verify);
294 Handle class_loader (THREAD, JNIHandles::resolve(loaderRef));
295 Handle protection_domain;
296 ClassLoadInfo cl_info(protection_domain);
297 Klass* k = SystemDictionary::resolve_from_stream(&st, class_name,
298 class_loader,
299 cl_info,
300 CHECK_NULL);
301
302 if (log_is_enabled(Debug, class, resolve)) {
303 trace_class_resolution(k);
304 }
305
306 cls = (jclass)JNIHandles::make_local(THREAD, k->java_mirror());
307 return cls;
308 JNI_END
309
310
311
312 DT_RETURN_MARK_DECL(FindClass, jclass
313 , HOTSPOT_JNI_FINDCLASS_RETURN(_ret_ref));
314
315 JNI_ENTRY(jclass, jni_FindClass(JNIEnv *env, const char *name))
316 HOTSPOT_JNI_FINDCLASS_ENTRY(env, (char *)name);
317
318 jclass result = nullptr;
319 DT_RETURN_MARK(FindClass, jclass, (const jclass&)result);
320
321 // This should be ClassNotFoundException imo.
322 TempNewSymbol class_name =
323 SystemDictionary::class_name_symbol(name, vmSymbols::java_lang_NoClassDefFoundError(),
324 CHECK_NULL);
325
326 //%note jni_3
327 Handle protection_domain;
328 // Find calling class
329 Klass* k = thread->security_get_caller_class(0);
330 // default to the system loader when no context
331 Handle loader(THREAD, SystemDictionary::java_system_loader());
332 if (k != nullptr) {
333 // Special handling to make sure JNI_OnLoad and JNI_OnUnload are executed
334 // in the correct class context.
335 if (k->class_loader() == nullptr &&
336 k->name() == vmSymbols::jdk_internal_loader_NativeLibraries()) {
337 JavaValue result(T_OBJECT);
338 JavaCalls::call_static(&result, k,
339 vmSymbols::getFromClass_name(),
340 vmSymbols::void_class_signature(),
341 CHECK_NULL);
342 // When invoked from JNI_OnLoad, NativeLibraries::getFromClass returns
343 // a non-null Class object. When invoked from JNI_OnUnload,
344 // it will return null to indicate no context.
345 oop mirror = result.get_oop();
346 if (mirror != nullptr) {
347 Klass* fromClass = java_lang_Class::as_Klass(mirror);
348 loader = Handle(THREAD, fromClass->class_loader());
349 protection_domain = Handle(THREAD, fromClass->protection_domain());
350 }
351 } else {
352 loader = Handle(THREAD, k->class_loader());
353 }
354 }
355
356 result = find_class_from_class_loader(env, class_name, true, loader,
357 protection_domain, true, thread);
358
359 if (log_is_enabled(Debug, class, resolve) && result != nullptr) {
360 trace_class_resolution(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(result)));
361 }
362
363 return result;
364 JNI_END
365
366 DT_RETURN_MARK_DECL(FromReflectedMethod, jmethodID
367 , HOTSPOT_JNI_FROMREFLECTEDMETHOD_RETURN((uintptr_t)_ret_ref));
368
369 JNI_ENTRY(jmethodID, jni_FromReflectedMethod(JNIEnv *env, jobject method))
370 HOTSPOT_JNI_FROMREFLECTEDMETHOD_ENTRY(env, method);
371
372 jmethodID ret = nullptr;
373 DT_RETURN_MARK(FromReflectedMethod, jmethodID, (const jmethodID&)ret);
374
375 // method is a handle to a java.lang.reflect.Method object
376 oop reflected = JNIHandles::resolve_non_null(method);
377 oop mirror = nullptr;
378 int slot = 0;
379
380 if (reflected->klass() == vmClasses::reflect_Constructor_klass()) {
381 mirror = java_lang_reflect_Constructor::clazz(reflected);
382 slot = java_lang_reflect_Constructor::slot(reflected);
383 } else {
384 assert(reflected->klass() == vmClasses::reflect_Method_klass(), "wrong type");
385 mirror = java_lang_reflect_Method::clazz(reflected);
386 slot = java_lang_reflect_Method::slot(reflected);
387 }
388 Klass* k1 = java_lang_Class::as_Klass(mirror);
389
390 // Make sure class is initialized before handing id's out to methods
391 k1->initialize(CHECK_NULL);
392 Method* m = InstanceKlass::cast(k1)->method_with_idnum(slot);
393 ret = m==nullptr? nullptr : m->jmethod_id(); // return null if reflected method deleted
394 return ret;
395 JNI_END
396
397 DT_RETURN_MARK_DECL(FromReflectedField, jfieldID
398 , HOTSPOT_JNI_FROMREFLECTEDFIELD_RETURN((uintptr_t)_ret_ref));
399
400 JNI_ENTRY(jfieldID, jni_FromReflectedField(JNIEnv *env, jobject field))
401 HOTSPOT_JNI_FROMREFLECTEDFIELD_ENTRY(env, field);
402
403 jfieldID ret = nullptr;
404 DT_RETURN_MARK(FromReflectedField, jfieldID, (const jfieldID&)ret);
405
406 // field is a handle to a java.lang.reflect.Field object
407 oop reflected = JNIHandles::resolve_non_null(field);
408 oop mirror = java_lang_reflect_Field::clazz(reflected);
409 Klass* k1 = java_lang_Class::as_Klass(mirror);
410 int slot = java_lang_reflect_Field::slot(reflected);
411 int modifiers = java_lang_reflect_Field::modifiers(reflected);
412
413 // Make sure class is initialized before handing id's out to fields
414 k1->initialize(CHECK_NULL);
415
416 // First check if this is a static field
417 if (modifiers & JVM_ACC_STATIC) {
418 int offset = InstanceKlass::cast(k1)->field_offset( slot );
419 JNIid* id = InstanceKlass::cast(k1)->jni_id_for(offset);
420 assert(id != nullptr, "corrupt Field object");
421 debug_only(id->set_is_static_field_id();)
422 // A jfieldID for a static field is a JNIid specifying the field holder and the offset within the Klass*
423 ret = jfieldIDWorkaround::to_static_jfieldID(id);
424 return ret;
425 }
426
427 // The slot is the index of the field description in the field-array
428 // The jfieldID is the offset of the field within the object
429 // It may also have hash bits for k, if VerifyJNIFields is turned on.
430 int offset = InstanceKlass::cast(k1)->field_offset( slot );
431 bool is_flat = InstanceKlass::cast(k1)->field_is_flat(slot);
432 assert(InstanceKlass::cast(k1)->contains_field_offset(offset), "stay within object");
433 ret = jfieldIDWorkaround::to_instance_jfieldID(k1, offset, is_flat);
434 return ret;
435 JNI_END
436
437
438 DT_RETURN_MARK_DECL(ToReflectedMethod, jobject
439 , HOTSPOT_JNI_TOREFLECTEDMETHOD_RETURN(_ret_ref));
440
441 JNI_ENTRY(jobject, jni_ToReflectedMethod(JNIEnv *env, jclass cls, jmethodID method_id, jboolean isStatic))
442 HOTSPOT_JNI_TOREFLECTEDMETHOD_ENTRY(env, cls, (uintptr_t) method_id, isStatic);
443
444 jobject ret = nullptr;
445 DT_RETURN_MARK(ToReflectedMethod, jobject, (const jobject&)ret);
446
447 methodHandle m (THREAD, Method::resolve_jmethod_id(method_id));
448 assert(m->is_static() == (isStatic != 0), "jni_ToReflectedMethod access flags doesn't match");
449 oop reflection_method;
450 if (m->is_object_constructor()) {
451 reflection_method = Reflection::new_constructor(m, CHECK_NULL);
452 } else {
453 reflection_method = Reflection::new_method(m, false, CHECK_NULL);
454 }
455 ret = JNIHandles::make_local(THREAD, reflection_method);
456 return ret;
457 JNI_END
458
459 DT_RETURN_MARK_DECL(GetSuperclass, jclass
460 , HOTSPOT_JNI_GETSUPERCLASS_RETURN(_ret_ref));
461
462 JNI_ENTRY(jclass, jni_GetSuperclass(JNIEnv *env, jclass sub))
463 HOTSPOT_JNI_GETSUPERCLASS_ENTRY(env, sub);
464
465 jclass obj = nullptr;
466 DT_RETURN_MARK(GetSuperclass, jclass, (const jclass&)obj);
467
468 oop mirror = JNIHandles::resolve_non_null(sub);
469 // primitive classes return null
470 if (java_lang_Class::is_primitive(mirror)) return nullptr;
471
472 // Rules of Class.getSuperClass as implemented by KLass::java_super:
473 // arrays return Object
474 // interfaces return null
475 // proper classes return Klass::super()
476 Klass* k = java_lang_Class::as_Klass(mirror);
477 if (k->is_interface()) return nullptr;
478
479 // return mirror for superclass
480 Klass* super = k->java_super();
481 // super2 is the value computed by the compiler's getSuperClass intrinsic:
482 debug_only(Klass* super2 = ( k->is_array_klass()
483 ? vmClasses::Object_klass()
484 : k->super() ) );
485 assert(super == super2,
486 "java_super computation depends on interface, array, other super");
487 obj = (super == nullptr) ? nullptr : (jclass) JNIHandles::make_local(THREAD, super->java_mirror());
488 return obj;
489 JNI_END
490
491 JNI_ENTRY_NO_PRESERVE(jboolean, jni_IsAssignableFrom(JNIEnv *env, jclass sub, jclass super))
492 HOTSPOT_JNI_ISASSIGNABLEFROM_ENTRY(env, sub, super);
493
494 oop sub_mirror = JNIHandles::resolve_non_null(sub);
495 oop super_mirror = JNIHandles::resolve_non_null(super);
496 if (java_lang_Class::is_primitive(sub_mirror) ||
497 java_lang_Class::is_primitive(super_mirror)) {
498 jboolean ret = (sub_mirror == super_mirror);
499
500 HOTSPOT_JNI_ISASSIGNABLEFROM_RETURN(ret);
501 return ret;
502 }
503 Klass* sub_klass = java_lang_Class::as_Klass(sub_mirror);
504 Klass* super_klass = java_lang_Class::as_Klass(super_mirror);
505 assert(sub_klass != nullptr && super_klass != nullptr, "invalid arguments to jni_IsAssignableFrom");
506 jboolean ret = sub_klass->is_subtype_of(super_klass) ?
507 JNI_TRUE : JNI_FALSE;
508
509 HOTSPOT_JNI_ISASSIGNABLEFROM_RETURN(ret);
510 return ret;
511 JNI_END
512
513
514 DT_RETURN_MARK_DECL(Throw, jint
515 , HOTSPOT_JNI_THROW_RETURN(_ret_ref));
516
517 JNI_ENTRY(jint, jni_Throw(JNIEnv *env, jthrowable obj))
518 HOTSPOT_JNI_THROW_ENTRY(env, obj);
519
520 jint ret = JNI_OK;
521 DT_RETURN_MARK(Throw, jint, (const jint&)ret);
522
523 THROW_OOP_(JNIHandles::resolve(obj), JNI_OK);
524 ShouldNotReachHere();
525 return 0; // Mute compiler.
526 JNI_END
527
528
529 DT_RETURN_MARK_DECL(ThrowNew, jint
530 , HOTSPOT_JNI_THROWNEW_RETURN(_ret_ref));
531
532 JNI_ENTRY(jint, jni_ThrowNew(JNIEnv *env, jclass clazz, const char *message))
533 HOTSPOT_JNI_THROWNEW_ENTRY(env, clazz, (char *) message);
534
535 jint ret = JNI_OK;
536 DT_RETURN_MARK(ThrowNew, jint, (const jint&)ret);
537
538 InstanceKlass* k = InstanceKlass::cast(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz)));
539 Symbol* name = k->name();
540 Handle class_loader (THREAD, k->class_loader());
541 Handle protection_domain (THREAD, k->protection_domain());
542 THROW_MSG_LOADER_(name, (char *)message, class_loader, protection_domain, JNI_OK);
543 ShouldNotReachHere();
544 return 0; // Mute compiler.
545 JNI_END
546
547
548 // JNI functions only transform a pending async exception to a synchronous
549 // exception in ExceptionOccurred and ExceptionCheck calls, since
550 // delivering an async exception in other places won't change the native
551 // code's control flow and would be harmful when native code further calls
552 // JNI functions with a pending exception. Async exception is also checked
553 // during the call, so ExceptionOccurred/ExceptionCheck won't return
554 // false but deliver the async exception at the very end during
555 // state transition.
556
557 static void jni_check_async_exceptions(JavaThread *thread) {
558 assert(thread == Thread::current(), "must be itself");
559 if (thread->has_async_exception_condition()) {
560 SafepointMechanism::process_if_requested_with_exit_check(thread, true /* check asyncs */);
561 }
562 }
563
564 JNI_ENTRY_NO_PRESERVE(jthrowable, jni_ExceptionOccurred(JNIEnv *env))
565 HOTSPOT_JNI_EXCEPTIONOCCURRED_ENTRY(env);
566
567 jni_check_async_exceptions(thread);
568 oop exception = thread->pending_exception();
569 jthrowable ret = (jthrowable) JNIHandles::make_local(THREAD, exception);
570
571 HOTSPOT_JNI_EXCEPTIONOCCURRED_RETURN(ret);
572 return ret;
573 JNI_END
574
575
576 JNI_ENTRY_NO_PRESERVE(void, jni_ExceptionDescribe(JNIEnv *env))
577 HOTSPOT_JNI_EXCEPTIONDESCRIBE_ENTRY(env);
578
579 if (thread->has_pending_exception()) {
580 Handle ex(thread, thread->pending_exception());
581 thread->clear_pending_exception();
582 jio_fprintf(defaultStream::error_stream(), "Exception ");
583 if (thread != nullptr && thread->threadObj() != nullptr) {
584 ResourceMark rm(THREAD);
585 jio_fprintf(defaultStream::error_stream(),
586 "in thread \"%s\" ", thread->name());
587 }
588 if (ex->is_a(vmClasses::Throwable_klass())) {
589 JavaValue result(T_VOID);
590 JavaCalls::call_virtual(&result,
591 ex,
592 vmClasses::Throwable_klass(),
593 vmSymbols::printStackTrace_name(),
594 vmSymbols::void_method_signature(),
595 THREAD);
596 // If an exception is thrown in the call it gets thrown away. Not much
597 // we can do with it. The native code that calls this, does not check
598 // for the exception - hence, it might still be in the thread when DestroyVM gets
599 // called, potentially causing a few asserts to trigger - since no pending exception
600 // is expected.
601 CLEAR_PENDING_EXCEPTION;
602 } else {
603 ResourceMark rm(THREAD);
604 jio_fprintf(defaultStream::error_stream(),
605 ". Uncaught exception of type %s.",
606 ex->klass()->external_name());
607 }
608 }
609
610 HOTSPOT_JNI_EXCEPTIONDESCRIBE_RETURN();
611 JNI_END
612
613
614 JNI_ENTRY_NO_PRESERVE(void, jni_ExceptionClear(JNIEnv *env))
615 HOTSPOT_JNI_EXCEPTIONCLEAR_ENTRY(env);
616
617 // The jni code might be using this API to clear java thrown exception.
618 // So just mark jvmti thread exception state as exception caught.
619 JvmtiThreadState *state = JavaThread::current()->jvmti_thread_state();
620 if (state != nullptr && state->is_exception_detected()) {
621 state->set_exception_caught();
622 }
623 thread->clear_pending_exception();
624
625 HOTSPOT_JNI_EXCEPTIONCLEAR_RETURN();
626 JNI_END
627
628
629 JNI_ENTRY(void, jni_FatalError(JNIEnv *env, const char *msg))
630 HOTSPOT_JNI_FATALERROR_ENTRY(env, (char *) msg);
631
632 tty->print_cr("FATAL ERROR in native method: %s", msg);
633 thread->print_jni_stack();
634 os::abort(); // Dump core and abort
635 JNI_END
636
637
638 JNI_ENTRY(jint, jni_PushLocalFrame(JNIEnv *env, jint capacity))
639 HOTSPOT_JNI_PUSHLOCALFRAME_ENTRY(env, capacity);
640
641 //%note jni_11
642 if (capacity < 0 ||
643 ((MaxJNILocalCapacity > 0) && (capacity > MaxJNILocalCapacity))) {
644 HOTSPOT_JNI_PUSHLOCALFRAME_RETURN((uint32_t)JNI_ERR);
645 return JNI_ERR;
646 }
647
648 thread->push_jni_handle_block();
649 jint ret = JNI_OK;
650 HOTSPOT_JNI_PUSHLOCALFRAME_RETURN(ret);
651 return ret;
652 JNI_END
653
654
655 JNI_ENTRY(jobject, jni_PopLocalFrame(JNIEnv *env, jobject result))
656 HOTSPOT_JNI_POPLOCALFRAME_ENTRY(env, result);
657
658 //%note jni_11
659 Handle result_handle(thread, JNIHandles::resolve(result));
660 JNIHandleBlock* old_handles = thread->active_handles();
661 JNIHandleBlock* new_handles = old_handles->pop_frame_link();
662 if (new_handles != nullptr) {
663 // As a sanity check we only release the handle blocks if the pop_frame_link is not null.
664 // This way code will still work if PopLocalFrame is called without a corresponding
665 // PushLocalFrame call. Note that we set the pop_frame_link to null explicitly, otherwise
666 // the release_block call will release the blocks.
667 thread->set_active_handles(new_handles);
668 old_handles->set_pop_frame_link(nullptr); // clear link we won't release new_handles below
669 JNIHandleBlock::release_block(old_handles, thread); // may block
670 result = JNIHandles::make_local(thread, result_handle());
671 }
672 HOTSPOT_JNI_POPLOCALFRAME_RETURN(result);
673 return result;
674 JNI_END
675
676
677 JNI_ENTRY(jobject, jni_NewGlobalRef(JNIEnv *env, jobject ref))
678 HOTSPOT_JNI_NEWGLOBALREF_ENTRY(env, ref);
679
680 Handle ref_handle(thread, JNIHandles::resolve(ref));
681 jobject ret = JNIHandles::make_global(ref_handle, AllocFailStrategy::RETURN_NULL);
682
683 HOTSPOT_JNI_NEWGLOBALREF_RETURN(ret);
684 return ret;
685 JNI_END
686
687 // Must be JNI_ENTRY (with HandleMark)
688 JNI_ENTRY_NO_PRESERVE(void, jni_DeleteGlobalRef(JNIEnv *env, jobject ref))
689 HOTSPOT_JNI_DELETEGLOBALREF_ENTRY(env, ref);
690
691 JNIHandles::destroy_global(ref);
692
693 HOTSPOT_JNI_DELETEGLOBALREF_RETURN();
694 JNI_END
695
696 JNI_ENTRY_NO_PRESERVE(void, jni_DeleteLocalRef(JNIEnv *env, jobject obj))
697 HOTSPOT_JNI_DELETELOCALREF_ENTRY(env, obj);
698
699 JNIHandles::destroy_local(obj);
700
701 HOTSPOT_JNI_DELETELOCALREF_RETURN();
702 JNI_END
703
704 JNI_ENTRY_NO_PRESERVE(jboolean, jni_IsSameObject(JNIEnv *env, jobject r1, jobject r2))
705 HOTSPOT_JNI_ISSAMEOBJECT_ENTRY(env, r1, r2);
706
707 jboolean ret = JNIHandles::is_same_object(r1, r2) ? JNI_TRUE : JNI_FALSE;
708
709 HOTSPOT_JNI_ISSAMEOBJECT_RETURN(ret);
710 return ret;
711 JNI_END
712
713
714 JNI_ENTRY(jobject, jni_NewLocalRef(JNIEnv *env, jobject ref))
715 HOTSPOT_JNI_NEWLOCALREF_ENTRY(env, ref);
716
717 jobject ret = JNIHandles::make_local(THREAD, JNIHandles::resolve(ref),
718 AllocFailStrategy::RETURN_NULL);
719
720 HOTSPOT_JNI_NEWLOCALREF_RETURN(ret);
721 return ret;
722 JNI_END
723
724 JNI_LEAF(jint, jni_EnsureLocalCapacity(JNIEnv *env, jint capacity))
725 HOTSPOT_JNI_ENSURELOCALCAPACITY_ENTRY(env, capacity);
726
727 jint ret;
728 if (capacity >= 0 &&
729 ((MaxJNILocalCapacity <= 0) || (capacity <= MaxJNILocalCapacity))) {
730 ret = JNI_OK;
731 } else {
732 ret = JNI_ERR;
733 }
734
735 HOTSPOT_JNI_ENSURELOCALCAPACITY_RETURN(ret);
736 return ret;
737 JNI_END
738
739 // Return the Handle Type
740 JNI_LEAF(jobjectRefType, jni_GetObjectRefType(JNIEnv *env, jobject obj))
741 HOTSPOT_JNI_GETOBJECTREFTYPE_ENTRY(env, obj);
742
743 jobjectRefType ret = JNIInvalidRefType;
744 if (obj != nullptr) {
745 ret = JNIHandles::handle_type(thread, obj);
746 }
747
748 HOTSPOT_JNI_GETOBJECTREFTYPE_RETURN((void *) ret);
749 return ret;
750 JNI_END
751
752
753 class JNI_ArgumentPusher : public SignatureIterator {
754 protected:
755 JavaCallArguments* _arguments;
756
757 void push_int(jint x) { _arguments->push_int(x); }
758 void push_long(jlong x) { _arguments->push_long(x); }
759 void push_float(jfloat x) { _arguments->push_float(x); }
760 void push_double(jdouble x) { _arguments->push_double(x); }
761 void push_object(jobject x) { _arguments->push_jobject(x); }
762
763 void push_boolean(jboolean b) {
764 // Normalize boolean arguments from native code by converting 1-255 to JNI_TRUE and
765 // 0 to JNI_FALSE. Boolean return values from native are normalized the same in
766 // TemplateInterpreterGenerator::generate_result_handler_for and
767 // SharedRuntime::generate_native_wrapper.
768 push_int(b == 0 ? JNI_FALSE : JNI_TRUE);
769 }
770
771 JNI_ArgumentPusher(Method* method)
772 : SignatureIterator(method->signature(),
773 Fingerprinter(methodHandle(Thread::current(), method)).fingerprint())
774 {
775 _arguments = nullptr;
776 }
777
778 public:
779 virtual void push_arguments_on(JavaCallArguments* arguments) = 0;
780 };
781
782
783 class JNI_ArgumentPusherVaArg : public JNI_ArgumentPusher {
784 va_list _ap;
785
786 void set_ap(va_list rap) {
787 va_copy(_ap, rap);
788 }
789
790 friend class SignatureIterator; // so do_parameters_on can call do_type
791 void do_type(BasicType type) {
792 switch (type) {
793 // these are coerced to int when using va_arg
794 case T_BYTE:
795 case T_CHAR:
796 case T_SHORT:
797 case T_INT: push_int(va_arg(_ap, jint)); break;
798 case T_BOOLEAN: push_boolean((jboolean) va_arg(_ap, jint)); break;
799
800 // each of these paths is exercised by the various jck Call[Static,Nonvirtual,][Void,Int,..]Method[A,V,] tests
801
802 case T_LONG: push_long(va_arg(_ap, jlong)); break;
803 // float is coerced to double w/ va_arg
804 case T_FLOAT: push_float((jfloat) va_arg(_ap, jdouble)); break;
805 case T_DOUBLE: push_double(va_arg(_ap, jdouble)); break;
806
807 case T_ARRAY:
808 case T_OBJECT: push_object(va_arg(_ap, jobject)); break;
809 default: ShouldNotReachHere();
810 }
811 }
812
813 public:
814 JNI_ArgumentPusherVaArg(jmethodID method_id, va_list rap)
815 : JNI_ArgumentPusher(Method::resolve_jmethod_id(method_id)) {
816 set_ap(rap);
817 }
818
819 ~JNI_ArgumentPusherVaArg() {
820 va_end(_ap);
821 }
822
823 virtual void push_arguments_on(JavaCallArguments* arguments) {
824 _arguments = arguments;
825 do_parameters_on(this);
826 }
827 };
828
829
830 class JNI_ArgumentPusherArray : public JNI_ArgumentPusher {
831 protected:
832 const jvalue *_ap;
833
834 inline void set_ap(const jvalue *rap) { _ap = rap; }
835
836 friend class SignatureIterator; // so do_parameters_on can call do_type
837 void do_type(BasicType type) {
838 switch (type) {
839 case T_CHAR: push_int((_ap++)->c); break;
840 case T_SHORT: push_int((_ap++)->s); break;
841 case T_BYTE: push_int((_ap++)->b); break;
842 case T_INT: push_int((_ap++)->i); break;
843 case T_BOOLEAN: push_boolean((_ap++)->z); break;
844 case T_LONG: push_long((_ap++)->j); break;
845 case T_FLOAT: push_float((_ap++)->f); break;
846 case T_DOUBLE: push_double((_ap++)->d); break;
847 case T_ARRAY:
848 case T_OBJECT:
849 case T_PRIMITIVE_OBJECT: push_object((_ap++)->l); break;
850 default: ShouldNotReachHere();
851 }
852 }
853
854 public:
855 JNI_ArgumentPusherArray(jmethodID method_id, const jvalue *rap)
856 : JNI_ArgumentPusher(Method::resolve_jmethod_id(method_id)) {
857 set_ap(rap);
858 }
859
860 virtual void push_arguments_on(JavaCallArguments* arguments) {
861 _arguments = arguments;
862 do_parameters_on(this);
863 }
864 };
865
866
867 enum JNICallType {
868 JNI_STATIC,
869 JNI_VIRTUAL,
870 JNI_NONVIRTUAL
871 };
872
873
874
875 static void jni_invoke_static(JNIEnv *env, JavaValue* result, jobject receiver, JNICallType call_type, jmethodID method_id, JNI_ArgumentPusher *args, TRAPS) {
876 methodHandle method(THREAD, Method::resolve_jmethod_id(method_id));
877
878 // Create object to hold arguments for the JavaCall, and associate it with
879 // the jni parser
880 ResourceMark rm(THREAD);
881 int number_of_parameters = method->size_of_parameters();
882 JavaCallArguments java_args(number_of_parameters);
883
884 assert(method->is_static(), "method should be static");
885
886 // Fill out JavaCallArguments object
887 args->push_arguments_on(&java_args);
888 // Initialize result type
889 result->set_type(args->return_type());
890
891 // Invoke the method. Result is returned as oop.
892 JavaCalls::call(result, method, &java_args, CHECK);
893
894 // Convert result
895 if (is_reference_type(result->get_type())) {
896 result->set_jobject(JNIHandles::make_local(THREAD, result->get_oop()));
897 }
898 }
899
900
901 static void jni_invoke_nonstatic(JNIEnv *env, JavaValue* result, jobject receiver, JNICallType call_type, jmethodID method_id, JNI_ArgumentPusher *args, TRAPS) {
902 oop recv = JNIHandles::resolve(receiver);
903 if (recv == nullptr) {
904 THROW(vmSymbols::java_lang_NullPointerException());
905 }
906 Handle h_recv(THREAD, recv);
907
908 int number_of_parameters;
909 Method* selected_method;
910 {
911 Method* m = Method::resolve_jmethod_id(method_id);
912 number_of_parameters = m->size_of_parameters();
913 InstanceKlass* holder = m->method_holder();
914 if (call_type != JNI_VIRTUAL) {
915 selected_method = m;
916 } else if (!m->has_itable_index()) {
917 // non-interface call -- for that little speed boost, don't handlize
918 debug_only(NoSafepointVerifier nosafepoint;)
919 // jni_GetMethodID makes sure class is linked and initialized
920 // so m should have a valid vtable index.
921 assert(m->valid_vtable_index(), "no valid vtable index");
922 int vtbl_index = m->vtable_index();
923 if (vtbl_index != Method::nonvirtual_vtable_index) {
924 selected_method = h_recv->klass()->method_at_vtable(vtbl_index);
925 } else {
926 // final method
927 selected_method = m;
928 }
929 } else {
930 // interface call
931 int itbl_index = m->itable_index();
932 Klass* k = h_recv->klass();
933 selected_method = InstanceKlass::cast(k)->method_at_itable(holder, itbl_index, CHECK);
934 }
935 }
936
937 if (selected_method->is_abstract()) {
938 ResourceMark rm(THREAD);
939 THROW_MSG(vmSymbols::java_lang_AbstractMethodError(), selected_method->name()->as_C_string());
940 }
941
942 methodHandle method(THREAD, selected_method);
943
944 // Create object to hold arguments for the JavaCall, and associate it with
945 // the jni parser
946 ResourceMark rm(THREAD);
947 JavaCallArguments java_args(number_of_parameters);
948
949 // handle arguments
950 assert(!method->is_static(), "method %s should not be static", method->name_and_sig_as_C_string());
951 java_args.push_oop(h_recv); // Push jobject handle
952
953 // Fill out JavaCallArguments object
954 args->push_arguments_on(&java_args);
955 // Initialize result type
956 result->set_type(args->return_type());
957
958 // Invoke the method. Result is returned as oop.
959 JavaCalls::call(result, method, &java_args, CHECK);
960
961 // Convert result
962 if (is_reference_type(result->get_type())) {
963 result->set_jobject(JNIHandles::make_local(THREAD, result->get_oop()));
964 }
965 }
966
967 DT_RETURN_MARK_DECL(AllocObject, jobject
968 , HOTSPOT_JNI_ALLOCOBJECT_RETURN(_ret_ref));
969
970 JNI_ENTRY(jobject, jni_AllocObject(JNIEnv *env, jclass clazz))
971 HOTSPOT_JNI_ALLOCOBJECT_ENTRY(env, clazz);
972
973 jobject ret = nullptr;
974 DT_RETURN_MARK(AllocObject, jobject, (const jobject&)ret);
975
976 oop clazzoop = JNIHandles::resolve_non_null(clazz);
977 Klass* k = java_lang_Class::as_Klass(clazzoop);
978 if (k == nullptr || k->is_inline_klass()) {
979 ResourceMark rm(THREAD);
980 THROW_(vmSymbols::java_lang_InstantiationException(), nullptr);
981 }
982 instanceOop i = InstanceKlass::allocate_instance(clazzoop, CHECK_NULL);
983 ret = JNIHandles::make_local(THREAD, i);
984 return ret;
985 JNI_END
986
987 DT_RETURN_MARK_DECL(NewObjectA, jobject
988 , HOTSPOT_JNI_NEWOBJECTA_RETURN(_ret_ref));
989
990 JNI_ENTRY(jobject, jni_NewObjectA(JNIEnv *env, jclass clazz, jmethodID methodID, const jvalue *args))
991 HOTSPOT_JNI_NEWOBJECTA_ENTRY(env, clazz, (uintptr_t) methodID);
992
993 jobject obj = nullptr;
994 DT_RETURN_MARK(NewObjectA, jobject, (const jobject&)obj);
995
996 oop clazzoop = JNIHandles::resolve_non_null(clazz);
997 Klass* k = java_lang_Class::as_Klass(clazzoop);
998 if (k == nullptr) {
999 ResourceMark rm(THREAD);
1000 THROW_(vmSymbols::java_lang_InstantiationException(), nullptr);
1001 }
1002
1003 instanceOop i = InstanceKlass::allocate_instance(clazzoop, CHECK_NULL);
1004 obj = JNIHandles::make_local(THREAD, i);
1005 JavaValue jvalue(T_VOID);
1006 JNI_ArgumentPusherArray ap(methodID, args);
1007 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_NULL);
1008
1009 return obj;
1010 JNI_END
1011
1012
1013 DT_RETURN_MARK_DECL(NewObjectV, jobject
1014 , HOTSPOT_JNI_NEWOBJECTV_RETURN(_ret_ref));
1015
1016 JNI_ENTRY(jobject, jni_NewObjectV(JNIEnv *env, jclass clazz, jmethodID methodID, va_list args))
1017 HOTSPOT_JNI_NEWOBJECTV_ENTRY(env, clazz, (uintptr_t) methodID);
1018
1019 jobject obj = nullptr;
1020 DT_RETURN_MARK(NewObjectV, jobject, (const jobject&)obj);
1021
1022 oop clazzoop = JNIHandles::resolve_non_null(clazz);
1023 Klass* k = java_lang_Class::as_Klass(clazzoop);
1024 if (k == nullptr) {
1025 ResourceMark rm(THREAD);
1026 THROW_(vmSymbols::java_lang_InstantiationException(), nullptr);
1027 }
1028
1029 instanceOop i = InstanceKlass::allocate_instance(clazzoop, CHECK_NULL);
1030 obj = JNIHandles::make_local(THREAD, i);
1031 JavaValue jvalue(T_VOID);
1032 JNI_ArgumentPusherVaArg ap(methodID, args);
1033 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_NULL);
1034
1035 return obj;
1036 JNI_END
1037
1038
1039 DT_RETURN_MARK_DECL(NewObject, jobject
1040 , HOTSPOT_JNI_NEWOBJECT_RETURN(_ret_ref));
1041
1042 JNI_ENTRY(jobject, jni_NewObject(JNIEnv *env, jclass clazz, jmethodID methodID, ...))
1043 HOTSPOT_JNI_NEWOBJECT_ENTRY(env, clazz, (uintptr_t) methodID);
1044
1045 jobject obj = nullptr;
1046 DT_RETURN_MARK(NewObject, jobject, (const jobject&)obj);
1047
1048 oop clazzoop = JNIHandles::resolve_non_null(clazz);
1049 Klass* k = java_lang_Class::as_Klass(clazzoop);
1050 if (k == nullptr) {
1051 ResourceMark rm(THREAD);
1052 THROW_(vmSymbols::java_lang_InstantiationException(), nullptr);
1053 }
1054
1055 instanceOop i = InstanceKlass::allocate_instance(clazzoop, CHECK_NULL);
1056 obj = JNIHandles::make_local(THREAD, i);
1057 va_list args;
1058 va_start(args, methodID);
1059 JavaValue jvalue(T_VOID);
1060 JNI_ArgumentPusherVaArg ap(methodID, args);
1061 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_NULL);
1062 va_end(args);
1063
1064 return obj;
1065 JNI_END
1066
1067
1068 JNI_ENTRY(jclass, jni_GetObjectClass(JNIEnv *env, jobject obj))
1069 HOTSPOT_JNI_GETOBJECTCLASS_ENTRY(env, obj);
1070
1071 Klass* k = JNIHandles::resolve_non_null(obj)->klass();
1072 jclass ret =
1073 (jclass) JNIHandles::make_local(THREAD, k->java_mirror());
1074
1075 HOTSPOT_JNI_GETOBJECTCLASS_RETURN(ret);
1076 return ret;
1077 JNI_END
1078
1079 JNI_ENTRY_NO_PRESERVE(jboolean, jni_IsInstanceOf(JNIEnv *env, jobject obj, jclass clazz))
1080 HOTSPOT_JNI_ISINSTANCEOF_ENTRY(env, obj, clazz);
1081
1082 jboolean ret = JNI_TRUE;
1083 if (obj != nullptr) {
1084 ret = JNI_FALSE;
1085 Klass* k = java_lang_Class::as_Klass(
1086 JNIHandles::resolve_non_null(clazz));
1087 if (k != nullptr) {
1088 ret = JNIHandles::resolve_non_null(obj)->is_a(k) ? JNI_TRUE : JNI_FALSE;
1089 }
1090 }
1091
1092 HOTSPOT_JNI_ISINSTANCEOF_RETURN(ret);
1093 return ret;
1094 JNI_END
1095
1096
1097 static jmethodID get_method_id(JNIEnv *env, jclass clazz, const char *name_str,
1098 const char *sig, bool is_static, TRAPS) {
1099 // %%%% This code should probably just call into a method in the LinkResolver
1100 //
1101 // The class should have been loaded (we have an instance of the class
1102 // passed in) so the method and signature should already be in the symbol
1103 // table. If they're not there, the method doesn't exist.
1104 const char *name_to_probe = (name_str == nullptr)
1105 ? vmSymbols::object_initializer_name()->as_C_string()
1106 : name_str;
1107 TempNewSymbol name = SymbolTable::probe(name_to_probe, (int)strlen(name_to_probe));
1108 TempNewSymbol signature = SymbolTable::probe(sig, (int)strlen(sig));
1109
1110 if (name == nullptr || signature == nullptr) {
1111 THROW_MSG_0(vmSymbols::java_lang_NoSuchMethodError(), name_str);
1112 }
1113
1114 oop mirror = JNIHandles::resolve_non_null(clazz);
1115 Klass* klass = java_lang_Class::as_Klass(mirror);
1116
1117 // Throw a NoSuchMethodError exception if we have an instance of a
1118 // primitive java.lang.Class
1119 if (java_lang_Class::is_primitive(mirror)) {
1120 ResourceMark rm(THREAD);
1121 THROW_MSG_0(vmSymbols::java_lang_NoSuchMethodError(), err_msg("%s%s.%s%s", is_static ? "static " : "", klass->signature_name(), name_str, sig));
1122 }
1123
1124 // Make sure class is linked and initialized before handing id's out to
1125 // Method*s.
1126 klass->initialize(CHECK_NULL);
1127
1128 Method* m;
1129 if (name == vmSymbols::object_initializer_name() ||
1130 name == vmSymbols::class_initializer_name()) {
1131 // Never search superclasses for constructors
1132 if (klass->is_instance_klass()) {
1133 m = InstanceKlass::cast(klass)->find_method(name, signature);
1134 } else {
1135 m = nullptr;
1136 }
1137 } else {
1138 m = klass->lookup_method(name, signature);
1139 if (m == nullptr && klass->is_instance_klass()) {
1140 m = InstanceKlass::cast(klass)->lookup_method_in_ordered_interfaces(name, signature);
1141 }
1142 }
1143 if (m == nullptr || (m->is_static() != is_static)) {
1144 ResourceMark rm(THREAD);
1145 THROW_MSG_0(vmSymbols::java_lang_NoSuchMethodError(), err_msg("%s%s.%s%s", is_static ? "static " : "", klass->signature_name(), name_str, sig));
1146 }
1147 return m->jmethod_id();
1148 }
1149
1150
1151 JNI_ENTRY(jmethodID, jni_GetMethodID(JNIEnv *env, jclass clazz,
1152 const char *name, const char *sig))
1153 HOTSPOT_JNI_GETMETHODID_ENTRY(env, clazz, (char *) name, (char *) sig);
1154 jmethodID ret = get_method_id(env, clazz, name, sig, false, thread);
1155 HOTSPOT_JNI_GETMETHODID_RETURN((uintptr_t) ret);
1156 return ret;
1157 JNI_END
1158
1159
1160 JNI_ENTRY(jmethodID, jni_GetStaticMethodID(JNIEnv *env, jclass clazz,
1161 const char *name, const char *sig))
1162 HOTSPOT_JNI_GETSTATICMETHODID_ENTRY(env, (char *) clazz, (char *) name, (char *)sig);
1163 jmethodID ret = get_method_id(env, clazz, name, sig, true, thread);
1164 HOTSPOT_JNI_GETSTATICMETHODID_RETURN((uintptr_t) ret);
1165 return ret;
1166 JNI_END
1167
1168
1169
1170 //
1171 // Calling Methods
1172 //
1173
1174
1175 #define DEFINE_CALLMETHOD(ResultType, Result, Tag \
1176 , EntryProbe, ReturnProbe) \
1177 \
1178 DT_RETURN_MARK_DECL_FOR(Result, Call##Result##Method, ResultType \
1179 , ReturnProbe); \
1180 \
1181 JNI_ENTRY(ResultType, \
1182 jni_Call##Result##Method(JNIEnv *env, jobject obj, jmethodID methodID, ...)) \
1183 \
1184 EntryProbe; \
1185 ResultType ret = 0;\
1186 DT_RETURN_MARK_FOR(Result, Call##Result##Method, ResultType, \
1187 (const ResultType&)ret);\
1188 \
1189 va_list args; \
1190 va_start(args, methodID); \
1191 JavaValue jvalue(Tag); \
1192 JNI_ArgumentPusherVaArg ap(methodID, args); \
1193 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK_0); \
1194 va_end(args); \
1195 ret = jvalue.get_##ResultType(); \
1196 return ret;\
1197 JNI_END
1198
1199 // the runtime type of subword integral basic types is integer
1200 DEFINE_CALLMETHOD(jboolean, Boolean, T_BOOLEAN
1201 , HOTSPOT_JNI_CALLBOOLEANMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1202 HOTSPOT_JNI_CALLBOOLEANMETHOD_RETURN(_ret_ref))
1203 DEFINE_CALLMETHOD(jbyte, Byte, T_BYTE
1204 , HOTSPOT_JNI_CALLBYTEMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1205 HOTSPOT_JNI_CALLBYTEMETHOD_RETURN(_ret_ref))
1206 DEFINE_CALLMETHOD(jchar, Char, T_CHAR
1207 , HOTSPOT_JNI_CALLCHARMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1208 HOTSPOT_JNI_CALLCHARMETHOD_RETURN(_ret_ref))
1209 DEFINE_CALLMETHOD(jshort, Short, T_SHORT
1210 , HOTSPOT_JNI_CALLSHORTMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1211 HOTSPOT_JNI_CALLSHORTMETHOD_RETURN(_ret_ref))
1212
1213 DEFINE_CALLMETHOD(jobject, Object, T_OBJECT
1214 , HOTSPOT_JNI_CALLOBJECTMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1215 HOTSPOT_JNI_CALLOBJECTMETHOD_RETURN(_ret_ref))
1216 DEFINE_CALLMETHOD(jint, Int, T_INT,
1217 HOTSPOT_JNI_CALLINTMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1218 HOTSPOT_JNI_CALLINTMETHOD_RETURN(_ret_ref))
1219 DEFINE_CALLMETHOD(jlong, Long, T_LONG
1220 , HOTSPOT_JNI_CALLLONGMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1221 HOTSPOT_JNI_CALLLONGMETHOD_RETURN(_ret_ref))
1222 // Float and double probes don't return value because dtrace doesn't currently support it
1223 DEFINE_CALLMETHOD(jfloat, Float, T_FLOAT
1224 , HOTSPOT_JNI_CALLFLOATMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1225 HOTSPOT_JNI_CALLFLOATMETHOD_RETURN())
1226 DEFINE_CALLMETHOD(jdouble, Double, T_DOUBLE
1227 , HOTSPOT_JNI_CALLDOUBLEMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1228 HOTSPOT_JNI_CALLDOUBLEMETHOD_RETURN())
1229
1230 #define DEFINE_CALLMETHODV(ResultType, Result, Tag \
1231 , EntryProbe, ReturnProbe) \
1232 \
1233 DT_RETURN_MARK_DECL_FOR(Result, Call##Result##MethodV, ResultType \
1234 , ReturnProbe); \
1235 \
1236 JNI_ENTRY(ResultType, \
1237 jni_Call##Result##MethodV(JNIEnv *env, jobject obj, jmethodID methodID, va_list args)) \
1238 \
1239 EntryProbe;\
1240 ResultType ret = 0;\
1241 DT_RETURN_MARK_FOR(Result, Call##Result##MethodV, ResultType, \
1242 (const ResultType&)ret);\
1243 \
1244 JavaValue jvalue(Tag); \
1245 JNI_ArgumentPusherVaArg ap(methodID, args); \
1246 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK_0); \
1247 ret = jvalue.get_##ResultType(); \
1248 return ret;\
1249 JNI_END
1250
1251 // the runtime type of subword integral basic types is integer
1252 DEFINE_CALLMETHODV(jboolean, Boolean, T_BOOLEAN
1253 , HOTSPOT_JNI_CALLBOOLEANMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1254 HOTSPOT_JNI_CALLBOOLEANMETHODV_RETURN(_ret_ref))
1255 DEFINE_CALLMETHODV(jbyte, Byte, T_BYTE
1256 , HOTSPOT_JNI_CALLBYTEMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1257 HOTSPOT_JNI_CALLBYTEMETHODV_RETURN(_ret_ref))
1258 DEFINE_CALLMETHODV(jchar, Char, T_CHAR
1259 , HOTSPOT_JNI_CALLCHARMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1260 HOTSPOT_JNI_CALLCHARMETHODV_RETURN(_ret_ref))
1261 DEFINE_CALLMETHODV(jshort, Short, T_SHORT
1262 , HOTSPOT_JNI_CALLSHORTMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1263 HOTSPOT_JNI_CALLSHORTMETHODV_RETURN(_ret_ref))
1264
1265 DEFINE_CALLMETHODV(jobject, Object, T_OBJECT
1266 , HOTSPOT_JNI_CALLOBJECTMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1267 HOTSPOT_JNI_CALLOBJECTMETHODV_RETURN(_ret_ref))
1268 DEFINE_CALLMETHODV(jint, Int, T_INT,
1269 HOTSPOT_JNI_CALLINTMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1270 HOTSPOT_JNI_CALLINTMETHODV_RETURN(_ret_ref))
1271 DEFINE_CALLMETHODV(jlong, Long, T_LONG
1272 , HOTSPOT_JNI_CALLLONGMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1273 HOTSPOT_JNI_CALLLONGMETHODV_RETURN(_ret_ref))
1274 // Float and double probes don't return value because dtrace doesn't currently support it
1275 DEFINE_CALLMETHODV(jfloat, Float, T_FLOAT
1276 , HOTSPOT_JNI_CALLFLOATMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1277 HOTSPOT_JNI_CALLFLOATMETHODV_RETURN())
1278 DEFINE_CALLMETHODV(jdouble, Double, T_DOUBLE
1279 , HOTSPOT_JNI_CALLDOUBLEMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1280 HOTSPOT_JNI_CALLDOUBLEMETHODV_RETURN())
1281
1282 #define DEFINE_CALLMETHODA(ResultType, Result, Tag \
1283 , EntryProbe, ReturnProbe) \
1284 \
1285 DT_RETURN_MARK_DECL_FOR(Result, Call##Result##MethodA, ResultType \
1286 , ReturnProbe); \
1287 \
1288 JNI_ENTRY(ResultType, \
1289 jni_Call##Result##MethodA(JNIEnv *env, jobject obj, jmethodID methodID, const jvalue *args)) \
1290 EntryProbe; \
1291 ResultType ret = 0;\
1292 DT_RETURN_MARK_FOR(Result, Call##Result##MethodA, ResultType, \
1293 (const ResultType&)ret);\
1294 \
1295 JavaValue jvalue(Tag); \
1296 JNI_ArgumentPusherArray ap(methodID, args); \
1297 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK_0); \
1298 ret = jvalue.get_##ResultType(); \
1299 return ret;\
1300 JNI_END
1301
1302 // the runtime type of subword integral basic types is integer
1303 DEFINE_CALLMETHODA(jboolean, Boolean, T_BOOLEAN
1304 , HOTSPOT_JNI_CALLBOOLEANMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1305 HOTSPOT_JNI_CALLBOOLEANMETHODA_RETURN(_ret_ref))
1306 DEFINE_CALLMETHODA(jbyte, Byte, T_BYTE
1307 , HOTSPOT_JNI_CALLBYTEMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1308 HOTSPOT_JNI_CALLBYTEMETHODA_RETURN(_ret_ref))
1309 DEFINE_CALLMETHODA(jchar, Char, T_CHAR
1310 , HOTSPOT_JNI_CALLCHARMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1311 HOTSPOT_JNI_CALLCHARMETHODA_RETURN(_ret_ref))
1312 DEFINE_CALLMETHODA(jshort, Short, T_SHORT
1313 , HOTSPOT_JNI_CALLSHORTMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1314 HOTSPOT_JNI_CALLSHORTMETHODA_RETURN(_ret_ref))
1315
1316 DEFINE_CALLMETHODA(jobject, Object, T_OBJECT
1317 , HOTSPOT_JNI_CALLOBJECTMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1318 HOTSPOT_JNI_CALLOBJECTMETHODA_RETURN(_ret_ref))
1319 DEFINE_CALLMETHODA(jint, Int, T_INT,
1320 HOTSPOT_JNI_CALLINTMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1321 HOTSPOT_JNI_CALLINTMETHODA_RETURN(_ret_ref))
1322 DEFINE_CALLMETHODA(jlong, Long, T_LONG
1323 , HOTSPOT_JNI_CALLLONGMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1324 HOTSPOT_JNI_CALLLONGMETHODA_RETURN(_ret_ref))
1325 // Float and double probes don't return value because dtrace doesn't currently support it
1326 DEFINE_CALLMETHODA(jfloat, Float, T_FLOAT
1327 , HOTSPOT_JNI_CALLFLOATMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1328 HOTSPOT_JNI_CALLFLOATMETHODA_RETURN())
1329 DEFINE_CALLMETHODA(jdouble, Double, T_DOUBLE
1330 , HOTSPOT_JNI_CALLDOUBLEMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1331 HOTSPOT_JNI_CALLDOUBLEMETHODA_RETURN())
1332
1333 DT_VOID_RETURN_MARK_DECL(CallVoidMethod, HOTSPOT_JNI_CALLVOIDMETHOD_RETURN());
1334 DT_VOID_RETURN_MARK_DECL(CallVoidMethodV, HOTSPOT_JNI_CALLVOIDMETHODV_RETURN());
1335 DT_VOID_RETURN_MARK_DECL(CallVoidMethodA, HOTSPOT_JNI_CALLVOIDMETHODA_RETURN());
1336
1337
1338 JNI_ENTRY(void, jni_CallVoidMethod(JNIEnv *env, jobject obj, jmethodID methodID, ...))
1339 HOTSPOT_JNI_CALLVOIDMETHOD_ENTRY(env, obj, (uintptr_t) methodID);
1340 DT_VOID_RETURN_MARK(CallVoidMethod);
1341
1342 va_list args;
1343 va_start(args, methodID);
1344 JavaValue jvalue(T_VOID);
1345 JNI_ArgumentPusherVaArg ap(methodID, args);
1346 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK);
1347 va_end(args);
1348 JNI_END
1349
1350
1351 JNI_ENTRY(void, jni_CallVoidMethodV(JNIEnv *env, jobject obj, jmethodID methodID, va_list args))
1352 HOTSPOT_JNI_CALLVOIDMETHODV_ENTRY(env, obj, (uintptr_t) methodID);
1353 DT_VOID_RETURN_MARK(CallVoidMethodV);
1354
1355 JavaValue jvalue(T_VOID);
1356 JNI_ArgumentPusherVaArg ap(methodID, args);
1357 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK);
1358 JNI_END
1359
1360
1361 JNI_ENTRY(void, jni_CallVoidMethodA(JNIEnv *env, jobject obj, jmethodID methodID, const jvalue *args))
1362 HOTSPOT_JNI_CALLVOIDMETHODA_ENTRY(env, obj, (uintptr_t) methodID);
1363 DT_VOID_RETURN_MARK(CallVoidMethodA);
1364
1365 JavaValue jvalue(T_VOID);
1366 JNI_ArgumentPusherArray ap(methodID, args);
1367 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK);
1368 JNI_END
1369
1370
1371
1372 #define DEFINE_CALLNONVIRTUALMETHOD(ResultType, Result, Tag \
1373 , EntryProbe, ReturnProbe) \
1374 \
1375 DT_RETURN_MARK_DECL_FOR(Result, CallNonvirtual##Result##Method, ResultType \
1376 , ReturnProbe);\
1377 \
1378 JNI_ENTRY(ResultType, \
1379 jni_CallNonvirtual##Result##Method(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, ...)) \
1380 \
1381 EntryProbe;\
1382 ResultType ret;\
1383 DT_RETURN_MARK_FOR(Result, CallNonvirtual##Result##Method, ResultType, \
1384 (const ResultType&)ret);\
1385 \
1386 va_list args; \
1387 va_start(args, methodID); \
1388 JavaValue jvalue(Tag); \
1389 JNI_ArgumentPusherVaArg ap(methodID, args); \
1390 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_0); \
1391 va_end(args); \
1392 ret = jvalue.get_##ResultType(); \
1393 return ret;\
1394 JNI_END
1395
1396 // the runtime type of subword integral basic types is integer
1397 DEFINE_CALLNONVIRTUALMETHOD(jboolean, Boolean, T_BOOLEAN
1398 , HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1399 HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHOD_RETURN(_ret_ref))
1400 DEFINE_CALLNONVIRTUALMETHOD(jbyte, Byte, T_BYTE
1401 , HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1402 HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHOD_RETURN(_ret_ref))
1403 DEFINE_CALLNONVIRTUALMETHOD(jchar, Char, T_CHAR
1404 , HOTSPOT_JNI_CALLNONVIRTUALCHARMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1405 HOTSPOT_JNI_CALLNONVIRTUALCHARMETHOD_RETURN(_ret_ref))
1406 DEFINE_CALLNONVIRTUALMETHOD(jshort, Short, T_SHORT
1407 , HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1408 HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHOD_RETURN(_ret_ref))
1409
1410 DEFINE_CALLNONVIRTUALMETHOD(jobject, Object, T_OBJECT
1411 , HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1412 HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHOD_RETURN(_ret_ref))
1413 DEFINE_CALLNONVIRTUALMETHOD(jint, Int, T_INT
1414 , HOTSPOT_JNI_CALLNONVIRTUALINTMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1415 HOTSPOT_JNI_CALLNONVIRTUALINTMETHOD_RETURN(_ret_ref))
1416 DEFINE_CALLNONVIRTUALMETHOD(jlong, Long, T_LONG
1417 , HOTSPOT_JNI_CALLNONVIRTUALLONGMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1418 // Float and double probes don't return value because dtrace doesn't currently support it
1419 HOTSPOT_JNI_CALLNONVIRTUALLONGMETHOD_RETURN(_ret_ref))
1420 DEFINE_CALLNONVIRTUALMETHOD(jfloat, Float, T_FLOAT
1421 , HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1422 HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHOD_RETURN())
1423 DEFINE_CALLNONVIRTUALMETHOD(jdouble, Double, T_DOUBLE
1424 , HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1425 HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHOD_RETURN())
1426
1427 #define DEFINE_CALLNONVIRTUALMETHODV(ResultType, Result, Tag \
1428 , EntryProbe, ReturnProbe) \
1429 \
1430 DT_RETURN_MARK_DECL_FOR(Result, CallNonvirtual##Result##MethodV, ResultType \
1431 , ReturnProbe);\
1432 \
1433 JNI_ENTRY(ResultType, \
1434 jni_CallNonvirtual##Result##MethodV(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, va_list args)) \
1435 \
1436 EntryProbe;\
1437 ResultType ret;\
1438 DT_RETURN_MARK_FOR(Result, CallNonvirtual##Result##MethodV, ResultType, \
1439 (const ResultType&)ret);\
1440 \
1441 JavaValue jvalue(Tag); \
1442 JNI_ArgumentPusherVaArg ap(methodID, args); \
1443 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_0); \
1444 ret = jvalue.get_##ResultType(); \
1445 return ret;\
1446 JNI_END
1447
1448 // the runtime type of subword integral basic types is integer
1449 DEFINE_CALLNONVIRTUALMETHODV(jboolean, Boolean, T_BOOLEAN
1450 , HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1451 HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHODV_RETURN(_ret_ref))
1452 DEFINE_CALLNONVIRTUALMETHODV(jbyte, Byte, T_BYTE
1453 , HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1454 HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHODV_RETURN(_ret_ref))
1455 DEFINE_CALLNONVIRTUALMETHODV(jchar, Char, T_CHAR
1456 , HOTSPOT_JNI_CALLNONVIRTUALCHARMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1457 HOTSPOT_JNI_CALLNONVIRTUALCHARMETHODV_RETURN(_ret_ref))
1458 DEFINE_CALLNONVIRTUALMETHODV(jshort, Short, T_SHORT
1459 , HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1460 HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHODV_RETURN(_ret_ref))
1461
1462 DEFINE_CALLNONVIRTUALMETHODV(jobject, Object, T_OBJECT
1463 , HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1464 HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHODV_RETURN(_ret_ref))
1465 DEFINE_CALLNONVIRTUALMETHODV(jint, Int, T_INT
1466 , HOTSPOT_JNI_CALLNONVIRTUALINTMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1467 HOTSPOT_JNI_CALLNONVIRTUALINTMETHODV_RETURN(_ret_ref))
1468 DEFINE_CALLNONVIRTUALMETHODV(jlong, Long, T_LONG
1469 , HOTSPOT_JNI_CALLNONVIRTUALLONGMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1470 // Float and double probes don't return value because dtrace doesn't currently support it
1471 HOTSPOT_JNI_CALLNONVIRTUALLONGMETHODV_RETURN(_ret_ref))
1472 DEFINE_CALLNONVIRTUALMETHODV(jfloat, Float, T_FLOAT
1473 , HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1474 HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHODV_RETURN())
1475 DEFINE_CALLNONVIRTUALMETHODV(jdouble, Double, T_DOUBLE
1476 , HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1477 HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHODV_RETURN())
1478
1479 #define DEFINE_CALLNONVIRTUALMETHODA(ResultType, Result, Tag \
1480 , EntryProbe, ReturnProbe) \
1481 \
1482 DT_RETURN_MARK_DECL_FOR(Result, CallNonvirtual##Result##MethodA, ResultType \
1483 , ReturnProbe);\
1484 \
1485 JNI_ENTRY(ResultType, \
1486 jni_CallNonvirtual##Result##MethodA(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, const jvalue *args)) \
1487 \
1488 EntryProbe;\
1489 ResultType ret;\
1490 DT_RETURN_MARK_FOR(Result, CallNonvirtual##Result##MethodA, ResultType, \
1491 (const ResultType&)ret);\
1492 \
1493 JavaValue jvalue(Tag); \
1494 JNI_ArgumentPusherArray ap(methodID, args); \
1495 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_0); \
1496 ret = jvalue.get_##ResultType(); \
1497 return ret;\
1498 JNI_END
1499
1500 // the runtime type of subword integral basic types is integer
1501 DEFINE_CALLNONVIRTUALMETHODA(jboolean, Boolean, T_BOOLEAN
1502 , HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1503 HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHODA_RETURN(_ret_ref))
1504 DEFINE_CALLNONVIRTUALMETHODA(jbyte, Byte, T_BYTE
1505 , HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1506 HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHODA_RETURN(_ret_ref))
1507 DEFINE_CALLNONVIRTUALMETHODA(jchar, Char, T_CHAR
1508 , HOTSPOT_JNI_CALLNONVIRTUALCHARMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1509 HOTSPOT_JNI_CALLNONVIRTUALCHARMETHODA_RETURN(_ret_ref))
1510 DEFINE_CALLNONVIRTUALMETHODA(jshort, Short, T_SHORT
1511 , HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1512 HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHODA_RETURN(_ret_ref))
1513
1514 DEFINE_CALLNONVIRTUALMETHODA(jobject, Object, T_OBJECT
1515 , HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1516 HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHODA_RETURN(_ret_ref))
1517 DEFINE_CALLNONVIRTUALMETHODA(jint, Int, T_INT
1518 , HOTSPOT_JNI_CALLNONVIRTUALINTMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1519 HOTSPOT_JNI_CALLNONVIRTUALINTMETHODA_RETURN(_ret_ref))
1520 DEFINE_CALLNONVIRTUALMETHODA(jlong, Long, T_LONG
1521 , HOTSPOT_JNI_CALLNONVIRTUALLONGMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1522 // Float and double probes don't return value because dtrace doesn't currently support it
1523 HOTSPOT_JNI_CALLNONVIRTUALLONGMETHODA_RETURN(_ret_ref))
1524 DEFINE_CALLNONVIRTUALMETHODA(jfloat, Float, T_FLOAT
1525 , HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1526 HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHODA_RETURN())
1527 DEFINE_CALLNONVIRTUALMETHODA(jdouble, Double, T_DOUBLE
1528 , HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1529 HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHODA_RETURN())
1530
1531 DT_VOID_RETURN_MARK_DECL(CallNonvirtualVoidMethod
1532 , HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHOD_RETURN());
1533 DT_VOID_RETURN_MARK_DECL(CallNonvirtualVoidMethodV
1534 , HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHODV_RETURN());
1535 DT_VOID_RETURN_MARK_DECL(CallNonvirtualVoidMethodA
1536 , HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHODA_RETURN());
1537
1538 JNI_ENTRY(void, jni_CallNonvirtualVoidMethod(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, ...))
1539 HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHOD_ENTRY(env, obj, cls, (uintptr_t) methodID);
1540 DT_VOID_RETURN_MARK(CallNonvirtualVoidMethod);
1541
1542 va_list args;
1543 va_start(args, methodID);
1544 JavaValue jvalue(T_VOID);
1545 JNI_ArgumentPusherVaArg ap(methodID, args);
1546 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK);
1547 va_end(args);
1548 JNI_END
1549
1550
1551 JNI_ENTRY(void, jni_CallNonvirtualVoidMethodV(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, va_list args))
1552 HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHODV_ENTRY(
1553 env, obj, cls, (uintptr_t) methodID);
1554 DT_VOID_RETURN_MARK(CallNonvirtualVoidMethodV);
1555
1556 JavaValue jvalue(T_VOID);
1557 JNI_ArgumentPusherVaArg ap(methodID, args);
1558 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK);
1559 JNI_END
1560
1561
1562 JNI_ENTRY(void, jni_CallNonvirtualVoidMethodA(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, const jvalue *args))
1563 HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHODA_ENTRY(
1564 env, obj, cls, (uintptr_t) methodID);
1565 DT_VOID_RETURN_MARK(CallNonvirtualVoidMethodA);
1566 JavaValue jvalue(T_VOID);
1567 JNI_ArgumentPusherArray ap(methodID, args);
1568 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK);
1569 JNI_END
1570
1571
1572
1573 #define DEFINE_CALLSTATICMETHOD(ResultType, Result, Tag \
1574 , EntryProbe, ResultProbe) \
1575 \
1576 DT_RETURN_MARK_DECL_FOR(Result, CallStatic##Result##Method, ResultType \
1577 , ResultProbe); \
1578 \
1579 JNI_ENTRY(ResultType, \
1580 jni_CallStatic##Result##Method(JNIEnv *env, jclass cls, jmethodID methodID, ...)) \
1581 \
1582 EntryProbe; \
1583 ResultType ret = 0;\
1584 DT_RETURN_MARK_FOR(Result, CallStatic##Result##Method, ResultType, \
1585 (const ResultType&)ret);\
1586 \
1587 va_list args; \
1588 va_start(args, methodID); \
1589 JavaValue jvalue(Tag); \
1590 JNI_ArgumentPusherVaArg ap(methodID, args); \
1591 jni_invoke_static(env, &jvalue, nullptr, JNI_STATIC, methodID, &ap, CHECK_0); \
1592 va_end(args); \
1593 ret = jvalue.get_##ResultType(); \
1594 return ret;\
1595 JNI_END
1596
1597 // the runtime type of subword integral basic types is integer
1598 DEFINE_CALLSTATICMETHOD(jboolean, Boolean, T_BOOLEAN
1599 , HOTSPOT_JNI_CALLSTATICBOOLEANMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1600 HOTSPOT_JNI_CALLSTATICBOOLEANMETHOD_RETURN(_ret_ref));
1601 DEFINE_CALLSTATICMETHOD(jbyte, Byte, T_BYTE
1602 , HOTSPOT_JNI_CALLSTATICBYTEMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1603 HOTSPOT_JNI_CALLSTATICBYTEMETHOD_RETURN(_ret_ref));
1604 DEFINE_CALLSTATICMETHOD(jchar, Char, T_CHAR
1605 , HOTSPOT_JNI_CALLSTATICCHARMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1606 HOTSPOT_JNI_CALLSTATICCHARMETHOD_RETURN(_ret_ref));
1607 DEFINE_CALLSTATICMETHOD(jshort, Short, T_SHORT
1608 , HOTSPOT_JNI_CALLSTATICSHORTMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1609 HOTSPOT_JNI_CALLSTATICSHORTMETHOD_RETURN(_ret_ref));
1610
1611 DEFINE_CALLSTATICMETHOD(jobject, Object, T_OBJECT
1612 , HOTSPOT_JNI_CALLSTATICOBJECTMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1613 HOTSPOT_JNI_CALLSTATICOBJECTMETHOD_RETURN(_ret_ref));
1614 DEFINE_CALLSTATICMETHOD(jint, Int, T_INT
1615 , HOTSPOT_JNI_CALLSTATICINTMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1616 HOTSPOT_JNI_CALLSTATICINTMETHOD_RETURN(_ret_ref));
1617 DEFINE_CALLSTATICMETHOD(jlong, Long, T_LONG
1618 , HOTSPOT_JNI_CALLSTATICLONGMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1619 HOTSPOT_JNI_CALLSTATICLONGMETHOD_RETURN(_ret_ref));
1620 // Float and double probes don't return value because dtrace doesn't currently support it
1621 DEFINE_CALLSTATICMETHOD(jfloat, Float, T_FLOAT
1622 , HOTSPOT_JNI_CALLSTATICFLOATMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1623 HOTSPOT_JNI_CALLSTATICFLOATMETHOD_RETURN());
1624 DEFINE_CALLSTATICMETHOD(jdouble, Double, T_DOUBLE
1625 , HOTSPOT_JNI_CALLSTATICDOUBLEMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1626 HOTSPOT_JNI_CALLSTATICDOUBLEMETHOD_RETURN());
1627
1628 #define DEFINE_CALLSTATICMETHODV(ResultType, Result, Tag \
1629 , EntryProbe, ResultProbe) \
1630 \
1631 DT_RETURN_MARK_DECL_FOR(Result, CallStatic##Result##MethodV, ResultType \
1632 , ResultProbe); \
1633 \
1634 JNI_ENTRY(ResultType, \
1635 jni_CallStatic##Result##MethodV(JNIEnv *env, jclass cls, jmethodID methodID, va_list args)) \
1636 \
1637 EntryProbe; \
1638 ResultType ret = 0;\
1639 DT_RETURN_MARK_FOR(Result, CallStatic##Result##MethodV, ResultType, \
1640 (const ResultType&)ret);\
1641 \
1642 JavaValue jvalue(Tag); \
1643 JNI_ArgumentPusherVaArg ap(methodID, args); \
1644 /* Make sure class is initialized before trying to invoke its method */ \
1645 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); \
1646 k->initialize(CHECK_0); \
1647 jni_invoke_static(env, &jvalue, nullptr, JNI_STATIC, methodID, &ap, CHECK_0); \
1648 va_end(args); \
1649 ret = jvalue.get_##ResultType(); \
1650 return ret;\
1651 JNI_END
1652
1653 // the runtime type of subword integral basic types is integer
1654 DEFINE_CALLSTATICMETHODV(jboolean, Boolean, T_BOOLEAN
1655 , HOTSPOT_JNI_CALLSTATICBOOLEANMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1656 HOTSPOT_JNI_CALLSTATICBOOLEANMETHODV_RETURN(_ret_ref));
1657 DEFINE_CALLSTATICMETHODV(jbyte, Byte, T_BYTE
1658 , HOTSPOT_JNI_CALLSTATICBYTEMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1659 HOTSPOT_JNI_CALLSTATICBYTEMETHODV_RETURN(_ret_ref));
1660 DEFINE_CALLSTATICMETHODV(jchar, Char, T_CHAR
1661 , HOTSPOT_JNI_CALLSTATICCHARMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1662 HOTSPOT_JNI_CALLSTATICCHARMETHODV_RETURN(_ret_ref));
1663 DEFINE_CALLSTATICMETHODV(jshort, Short, T_SHORT
1664 , HOTSPOT_JNI_CALLSTATICSHORTMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1665 HOTSPOT_JNI_CALLSTATICSHORTMETHODV_RETURN(_ret_ref));
1666
1667 DEFINE_CALLSTATICMETHODV(jobject, Object, T_OBJECT
1668 , HOTSPOT_JNI_CALLSTATICOBJECTMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1669 HOTSPOT_JNI_CALLSTATICOBJECTMETHODV_RETURN(_ret_ref));
1670 DEFINE_CALLSTATICMETHODV(jint, Int, T_INT
1671 , HOTSPOT_JNI_CALLSTATICINTMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1672 HOTSPOT_JNI_CALLSTATICINTMETHODV_RETURN(_ret_ref));
1673 DEFINE_CALLSTATICMETHODV(jlong, Long, T_LONG
1674 , HOTSPOT_JNI_CALLSTATICLONGMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1675 HOTSPOT_JNI_CALLSTATICLONGMETHODV_RETURN(_ret_ref));
1676 // Float and double probes don't return value because dtrace doesn't currently support it
1677 DEFINE_CALLSTATICMETHODV(jfloat, Float, T_FLOAT
1678 , HOTSPOT_JNI_CALLSTATICFLOATMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1679 HOTSPOT_JNI_CALLSTATICFLOATMETHODV_RETURN());
1680 DEFINE_CALLSTATICMETHODV(jdouble, Double, T_DOUBLE
1681 , HOTSPOT_JNI_CALLSTATICDOUBLEMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1682 HOTSPOT_JNI_CALLSTATICDOUBLEMETHODV_RETURN());
1683
1684 #define DEFINE_CALLSTATICMETHODA(ResultType, Result, Tag \
1685 , EntryProbe, ResultProbe) \
1686 \
1687 DT_RETURN_MARK_DECL_FOR(Result, CallStatic##Result##MethodA, ResultType \
1688 , ResultProbe); \
1689 \
1690 JNI_ENTRY(ResultType, \
1691 jni_CallStatic##Result##MethodA(JNIEnv *env, jclass cls, jmethodID methodID, const jvalue *args)) \
1692 \
1693 EntryProbe; \
1694 ResultType ret = 0;\
1695 DT_RETURN_MARK_FOR(Result, CallStatic##Result##MethodA, ResultType, \
1696 (const ResultType&)ret);\
1697 \
1698 JavaValue jvalue(Tag); \
1699 JNI_ArgumentPusherArray ap(methodID, args); \
1700 jni_invoke_static(env, &jvalue, nullptr, JNI_STATIC, methodID, &ap, CHECK_0); \
1701 ret = jvalue.get_##ResultType(); \
1702 return ret;\
1703 JNI_END
1704
1705 // the runtime type of subword integral basic types is integer
1706 DEFINE_CALLSTATICMETHODA(jboolean, Boolean, T_BOOLEAN
1707 , HOTSPOT_JNI_CALLSTATICBOOLEANMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1708 HOTSPOT_JNI_CALLSTATICBOOLEANMETHODA_RETURN(_ret_ref));
1709 DEFINE_CALLSTATICMETHODA(jbyte, Byte, T_BYTE
1710 , HOTSPOT_JNI_CALLSTATICBYTEMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1711 HOTSPOT_JNI_CALLSTATICBYTEMETHODA_RETURN(_ret_ref));
1712 DEFINE_CALLSTATICMETHODA(jchar, Char, T_CHAR
1713 , HOTSPOT_JNI_CALLSTATICCHARMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1714 HOTSPOT_JNI_CALLSTATICCHARMETHODA_RETURN(_ret_ref));
1715 DEFINE_CALLSTATICMETHODA(jshort, Short, T_SHORT
1716 , HOTSPOT_JNI_CALLSTATICSHORTMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1717 HOTSPOT_JNI_CALLSTATICSHORTMETHODA_RETURN(_ret_ref));
1718
1719 DEFINE_CALLSTATICMETHODA(jobject, Object, T_OBJECT
1720 , HOTSPOT_JNI_CALLSTATICOBJECTMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1721 HOTSPOT_JNI_CALLSTATICOBJECTMETHODA_RETURN(_ret_ref));
1722 DEFINE_CALLSTATICMETHODA(jint, Int, T_INT
1723 , HOTSPOT_JNI_CALLSTATICINTMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1724 HOTSPOT_JNI_CALLSTATICINTMETHODA_RETURN(_ret_ref));
1725 DEFINE_CALLSTATICMETHODA(jlong, Long, T_LONG
1726 , HOTSPOT_JNI_CALLSTATICLONGMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1727 HOTSPOT_JNI_CALLSTATICLONGMETHODA_RETURN(_ret_ref));
1728 // Float and double probes don't return value because dtrace doesn't currently support it
1729 DEFINE_CALLSTATICMETHODA(jfloat, Float, T_FLOAT
1730 , HOTSPOT_JNI_CALLSTATICFLOATMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1731 HOTSPOT_JNI_CALLSTATICFLOATMETHODA_RETURN());
1732 DEFINE_CALLSTATICMETHODA(jdouble, Double, T_DOUBLE
1733 , HOTSPOT_JNI_CALLSTATICDOUBLEMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1734 HOTSPOT_JNI_CALLSTATICDOUBLEMETHODA_RETURN());
1735
1736 DT_VOID_RETURN_MARK_DECL(CallStaticVoidMethod
1737 , HOTSPOT_JNI_CALLSTATICVOIDMETHOD_RETURN());
1738 DT_VOID_RETURN_MARK_DECL(CallStaticVoidMethodV
1739 , HOTSPOT_JNI_CALLSTATICVOIDMETHODV_RETURN());
1740 DT_VOID_RETURN_MARK_DECL(CallStaticVoidMethodA
1741 , HOTSPOT_JNI_CALLSTATICVOIDMETHODA_RETURN());
1742
1743 JNI_ENTRY(void, jni_CallStaticVoidMethod(JNIEnv *env, jclass cls, jmethodID methodID, ...))
1744 HOTSPOT_JNI_CALLSTATICVOIDMETHOD_ENTRY(env, cls, (uintptr_t) methodID);
1745 DT_VOID_RETURN_MARK(CallStaticVoidMethod);
1746
1747 va_list args;
1748 va_start(args, methodID);
1749 JavaValue jvalue(T_VOID);
1750 JNI_ArgumentPusherVaArg ap(methodID, args);
1751 jni_invoke_static(env, &jvalue, nullptr, JNI_STATIC, methodID, &ap, CHECK);
1752 va_end(args);
1753 JNI_END
1754
1755
1756 JNI_ENTRY(void, jni_CallStaticVoidMethodV(JNIEnv *env, jclass cls, jmethodID methodID, va_list args))
1757 HOTSPOT_JNI_CALLSTATICVOIDMETHODV_ENTRY(env, cls, (uintptr_t) methodID);
1758 DT_VOID_RETURN_MARK(CallStaticVoidMethodV);
1759
1760 JavaValue jvalue(T_VOID);
1761 JNI_ArgumentPusherVaArg ap(methodID, args);
1762 jni_invoke_static(env, &jvalue, nullptr, JNI_STATIC, methodID, &ap, CHECK);
1763 JNI_END
1764
1765
1766 JNI_ENTRY(void, jni_CallStaticVoidMethodA(JNIEnv *env, jclass cls, jmethodID methodID, const jvalue *args))
1767 HOTSPOT_JNI_CALLSTATICVOIDMETHODA_ENTRY(env, cls, (uintptr_t) methodID);
1768 DT_VOID_RETURN_MARK(CallStaticVoidMethodA);
1769
1770 JavaValue jvalue(T_VOID);
1771 JNI_ArgumentPusherArray ap(methodID, args);
1772 jni_invoke_static(env, &jvalue, nullptr, JNI_STATIC, methodID, &ap, CHECK);
1773 JNI_END
1774
1775
1776 //
1777 // Accessing Fields
1778 //
1779
1780
1781 DT_RETURN_MARK_DECL(GetFieldID, jfieldID
1782 , HOTSPOT_JNI_GETFIELDID_RETURN((uintptr_t)_ret_ref));
1783
1784 JNI_ENTRY(jfieldID, jni_GetFieldID(JNIEnv *env, jclass clazz,
1785 const char *name, const char *sig))
1786 HOTSPOT_JNI_GETFIELDID_ENTRY(env, clazz, (char *) name, (char *) sig);
1787 jfieldID ret = 0;
1788 DT_RETURN_MARK(GetFieldID, jfieldID, (const jfieldID&)ret);
1789
1790 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz));
1791
1792 // The class should have been loaded (we have an instance of the class
1793 // passed in) so the field and signature should already be in the symbol
1794 // table. If they're not there, the field doesn't exist.
1795 TempNewSymbol fieldname = SymbolTable::probe(name, (int)strlen(name));
1796 TempNewSymbol signame = SymbolTable::probe(sig, (int)strlen(sig));
1797 if (fieldname == nullptr || signame == nullptr) {
1798 ResourceMark rm;
1799 THROW_MSG_0(vmSymbols::java_lang_NoSuchFieldError(), err_msg("%s.%s %s", k->external_name(), name, sig));
1800 }
1801
1802 // Make sure class is initialized before handing id's out to fields
1803 k->initialize(CHECK_NULL);
1804
1805 fieldDescriptor fd;
1806 if (!k->is_instance_klass() ||
1807 !InstanceKlass::cast(k)->find_field(fieldname, signame, false, &fd)) {
1808 ResourceMark rm;
1809 THROW_MSG_0(vmSymbols::java_lang_NoSuchFieldError(), err_msg("%s.%s %s", k->external_name(), name, sig));
1810 }
1811
1812 // A jfieldID for a non-static field is simply the offset of the field within the instanceOop
1813 // It may also have hash bits for k, if VerifyJNIFields is turned on.
1814 ret = jfieldIDWorkaround::to_instance_jfieldID(k, fd.offset(), fd.is_flat());
1815 return ret;
1816 JNI_END
1817
1818
1819 JNI_ENTRY(jobject, jni_GetObjectField(JNIEnv *env, jobject obj, jfieldID fieldID))
1820 HOTSPOT_JNI_GETOBJECTFIELD_ENTRY(env, obj, (uintptr_t) fieldID);
1821 oop o = JNIHandles::resolve_non_null(obj);
1822 Klass* k = o->klass();
1823 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID);
1824 oop res = nullptr;
1825 // Keep JVMTI addition small and only check enabled flag here.
1826 // jni_GetField_probe() assumes that is okay to create handles.
1827 if (JvmtiExport::should_post_field_access()) {
1828 o = JvmtiExport::jni_GetField_probe(thread, obj, o, k, fieldID, false);
1829 }
1830 if (!jfieldIDWorkaround::is_flat_jfieldID(fieldID)) {
1831 res = HeapAccess<ON_UNKNOWN_OOP_REF>::oop_load_at(o, offset);
1832 } else {
1833 assert(k->is_instance_klass(), "Only instance can have flat fields");
1834 InstanceKlass* ik = InstanceKlass::cast(k);
1835 fieldDescriptor fd;
1836 ik->find_field_from_offset(offset, false, &fd); // performance bottleneck
1837 InstanceKlass* holder = fd.field_holder();
1838 InlineKlass* field_vklass = InlineKlass::cast(holder->get_inline_type_field_klass(fd.index()));
1839 res = field_vklass->read_flat_field(o, ik->field_offset(fd.index()), CHECK_NULL);
1840 }
1841 jobject ret = JNIHandles::make_local(THREAD, res);
1842 HOTSPOT_JNI_GETOBJECTFIELD_RETURN(ret);
1843 return ret;
1844 JNI_END
1845
1846
1847
1848 #define DEFINE_GETFIELD(Return,Fieldname,Result \
1849 , EntryProbe, ReturnProbe) \
1850 \
1851 DT_RETURN_MARK_DECL_FOR(Result, Get##Result##Field, Return \
1852 , ReturnProbe); \
1853 \
1854 JNI_ENTRY_NO_PRESERVE(Return, jni_Get##Result##Field(JNIEnv *env, jobject obj, jfieldID fieldID)) \
1855 \
1856 EntryProbe; \
1857 Return ret = 0;\
1858 DT_RETURN_MARK_FOR(Result, Get##Result##Field, Return, (const Return&)ret);\
1859 \
1860 oop o = JNIHandles::resolve_non_null(obj); \
1861 Klass* k = o->klass(); \
1862 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID); \
1863 /* Keep JVMTI addition small and only check enabled flag here. */ \
1864 if (JvmtiExport::should_post_field_access()) { \
1865 o = JvmtiExport::jni_GetField_probe(thread, obj, o, k, fieldID, false); \
1866 } \
1867 ret = o->Fieldname##_field(offset); \
1868 return ret; \
1869 JNI_END
1870
1871 DEFINE_GETFIELD(jboolean, bool, Boolean
1872 , HOTSPOT_JNI_GETBOOLEANFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
1873 HOTSPOT_JNI_GETBOOLEANFIELD_RETURN(_ret_ref))
1874 DEFINE_GETFIELD(jbyte, byte, Byte
1875 , HOTSPOT_JNI_GETBYTEFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
1876 HOTSPOT_JNI_GETBYTEFIELD_RETURN(_ret_ref))
1877 DEFINE_GETFIELD(jchar, char, Char
1878 , HOTSPOT_JNI_GETCHARFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
1879 HOTSPOT_JNI_GETCHARFIELD_RETURN(_ret_ref))
1880 DEFINE_GETFIELD(jshort, short, Short
1881 , HOTSPOT_JNI_GETSHORTFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
1882 HOTSPOT_JNI_GETSHORTFIELD_RETURN(_ret_ref))
1883 DEFINE_GETFIELD(jint, int, Int
1884 , HOTSPOT_JNI_GETINTFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
1885 HOTSPOT_JNI_GETINTFIELD_RETURN(_ret_ref))
1886 DEFINE_GETFIELD(jlong, long, Long
1887 , HOTSPOT_JNI_GETLONGFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
1888 HOTSPOT_JNI_GETLONGFIELD_RETURN(_ret_ref))
1889 // Float and double probes don't return value because dtrace doesn't currently support it
1890 DEFINE_GETFIELD(jfloat, float, Float
1891 , HOTSPOT_JNI_GETFLOATFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
1892 HOTSPOT_JNI_GETFLOATFIELD_RETURN())
1893 DEFINE_GETFIELD(jdouble, double, Double
1894 , HOTSPOT_JNI_GETDOUBLEFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
1895 HOTSPOT_JNI_GETDOUBLEFIELD_RETURN())
1896
1897 address jni_GetBooleanField_addr() {
1898 return (address)jni_GetBooleanField;
1899 }
1900 address jni_GetByteField_addr() {
1901 return (address)jni_GetByteField;
1902 }
1903 address jni_GetCharField_addr() {
1904 return (address)jni_GetCharField;
1905 }
1906 address jni_GetShortField_addr() {
1907 return (address)jni_GetShortField;
1908 }
1909 address jni_GetIntField_addr() {
1910 return (address)jni_GetIntField;
1911 }
1912 address jni_GetLongField_addr() {
1913 return (address)jni_GetLongField;
1914 }
1915 address jni_GetFloatField_addr() {
1916 return (address)jni_GetFloatField;
1917 }
1918 address jni_GetDoubleField_addr() {
1919 return (address)jni_GetDoubleField;
1920 }
1921
1922 JNI_ENTRY_NO_PRESERVE(void, jni_SetObjectField(JNIEnv *env, jobject obj, jfieldID fieldID, jobject value))
1923 HOTSPOT_JNI_SETOBJECTFIELD_ENTRY(env, obj, (uintptr_t) fieldID, value);
1924 oop o = JNIHandles::resolve_non_null(obj);
1925 Klass* k = o->klass();
1926 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID);
1927 // Keep JVMTI addition small and only check enabled flag here.
1928 if (JvmtiExport::should_post_field_modification()) {
1929 jvalue field_value;
1930 field_value.l = value;
1931 o = JvmtiExport::jni_SetField_probe(thread, obj, o, k, fieldID, false, JVM_SIGNATURE_CLASS, (jvalue *)&field_value);
1932 }
1933 if (!jfieldIDWorkaround::is_flat_jfieldID(fieldID)) {
1934 HeapAccess<ON_UNKNOWN_OOP_REF>::oop_store_at(o, offset, JNIHandles::resolve(value));
1935 } else {
1936 assert(k->is_instance_klass(), "Only instances can have flat fields");
1937 InstanceKlass* ik = InstanceKlass::cast(k);
1938 fieldDescriptor fd;
1939 ik->find_field_from_offset(offset, false, &fd);
1940 InstanceKlass* holder = fd.field_holder();
1941 InlineKlass* vklass = InlineKlass::cast(holder->get_inline_type_field_klass(fd.index()));
1942 oop v = JNIHandles::resolve_non_null(value);
1943 vklass->write_flat_field(o, offset, v, CHECK);
1944 }
1945 HOTSPOT_JNI_SETOBJECTFIELD_RETURN();
1946 JNI_END
1947
1948 // TODO: make this a template
1949
1950 #define DEFINE_SETFIELD(Argument,Fieldname,Result,SigType,unionType \
1951 , EntryProbe, ReturnProbe) \
1952 \
1953 JNI_ENTRY_NO_PRESERVE(void, jni_Set##Result##Field(JNIEnv *env, jobject obj, jfieldID fieldID, Argument value)) \
1954 \
1955 EntryProbe; \
1956 \
1957 oop o = JNIHandles::resolve_non_null(obj); \
1958 Klass* k = o->klass(); \
1959 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID); \
1960 /* Keep JVMTI addition small and only check enabled flag here. */ \
1961 if (JvmtiExport::should_post_field_modification()) { \
1962 jvalue field_value; \
1963 field_value.unionType = value; \
1964 o = JvmtiExport::jni_SetField_probe(thread, obj, o, k, fieldID, false, SigType, (jvalue *)&field_value); \
1965 } \
1966 o->Fieldname##_field_put(offset, value); \
1967 ReturnProbe; \
1968 JNI_END
1969
1970 DEFINE_SETFIELD(jboolean, bool, Boolean, JVM_SIGNATURE_BOOLEAN, z
1971 , HOTSPOT_JNI_SETBOOLEANFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value),
1972 HOTSPOT_JNI_SETBOOLEANFIELD_RETURN())
1973 DEFINE_SETFIELD(jbyte, byte, Byte, JVM_SIGNATURE_BYTE, b
1974 , HOTSPOT_JNI_SETBYTEFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value),
1975 HOTSPOT_JNI_SETBYTEFIELD_RETURN())
1976 DEFINE_SETFIELD(jchar, char, Char, JVM_SIGNATURE_CHAR, c
1977 , HOTSPOT_JNI_SETCHARFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value),
1978 HOTSPOT_JNI_SETCHARFIELD_RETURN())
1979 DEFINE_SETFIELD(jshort, short, Short, JVM_SIGNATURE_SHORT, s
1980 , HOTSPOT_JNI_SETSHORTFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value),
1981 HOTSPOT_JNI_SETSHORTFIELD_RETURN())
1982 DEFINE_SETFIELD(jint, int, Int, JVM_SIGNATURE_INT, i
1983 , HOTSPOT_JNI_SETINTFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value),
1984 HOTSPOT_JNI_SETINTFIELD_RETURN())
1985 DEFINE_SETFIELD(jlong, long, Long, JVM_SIGNATURE_LONG, j
1986 , HOTSPOT_JNI_SETLONGFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value),
1987 HOTSPOT_JNI_SETLONGFIELD_RETURN())
1988 // Float and double probes don't return value because dtrace doesn't currently support it
1989 DEFINE_SETFIELD(jfloat, float, Float, JVM_SIGNATURE_FLOAT, f
1990 , HOTSPOT_JNI_SETFLOATFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
1991 HOTSPOT_JNI_SETFLOATFIELD_RETURN())
1992 DEFINE_SETFIELD(jdouble, double, Double, JVM_SIGNATURE_DOUBLE, d
1993 , HOTSPOT_JNI_SETDOUBLEFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
1994 HOTSPOT_JNI_SETDOUBLEFIELD_RETURN())
1995
1996 DT_RETURN_MARK_DECL(ToReflectedField, jobject
1997 , HOTSPOT_JNI_TOREFLECTEDFIELD_RETURN(_ret_ref));
1998
1999 JNI_ENTRY(jobject, jni_ToReflectedField(JNIEnv *env, jclass cls, jfieldID fieldID, jboolean isStatic))
2000 HOTSPOT_JNI_TOREFLECTEDFIELD_ENTRY(env, cls, (uintptr_t) fieldID, isStatic);
2001 jobject ret = nullptr;
2002 DT_RETURN_MARK(ToReflectedField, jobject, (const jobject&)ret);
2003
2004 fieldDescriptor fd;
2005 bool found = false;
2006 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2007
2008 assert(jfieldIDWorkaround::is_static_jfieldID(fieldID) == (isStatic != 0), "invalid fieldID");
2009
2010 if (isStatic) {
2011 // Static field. The fieldID a JNIid specifying the field holder and the offset within the Klass*.
2012 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID);
2013 assert(id->is_static_field_id(), "invalid static field id");
2014 found = id->find_local_field(&fd);
2015 } else {
2016 // Non-static field. The fieldID is really the offset of the field within the instanceOop.
2017 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID);
2018 found = InstanceKlass::cast(k)->find_field_from_offset(offset, false, &fd);
2019 }
2020 assert(found, "bad fieldID passed into jni_ToReflectedField");
2021 oop reflected = Reflection::new_field(&fd, CHECK_NULL);
2022 ret = JNIHandles::make_local(THREAD, reflected);
2023 return ret;
2024 JNI_END
2025
2026
2027 //
2028 // Accessing Static Fields
2029 //
2030 DT_RETURN_MARK_DECL(GetStaticFieldID, jfieldID
2031 , HOTSPOT_JNI_GETSTATICFIELDID_RETURN((uintptr_t)_ret_ref));
2032
2033 JNI_ENTRY(jfieldID, jni_GetStaticFieldID(JNIEnv *env, jclass clazz,
2034 const char *name, const char *sig))
2035 HOTSPOT_JNI_GETSTATICFIELDID_ENTRY(env, clazz, (char *) name, (char *) sig);
2036 jfieldID ret = nullptr;
2037 DT_RETURN_MARK(GetStaticFieldID, jfieldID, (const jfieldID&)ret);
2038
2039 // The class should have been loaded (we have an instance of the class
2040 // passed in) so the field and signature should already be in the symbol
2041 // table. If they're not there, the field doesn't exist.
2042 TempNewSymbol fieldname = SymbolTable::probe(name, (int)strlen(name));
2043 TempNewSymbol signame = SymbolTable::probe(sig, (int)strlen(sig));
2044 if (fieldname == nullptr || signame == nullptr) {
2045 THROW_MSG_0(vmSymbols::java_lang_NoSuchFieldError(), (char*) name);
2046 }
2047 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz));
2048 // Make sure class is initialized before handing id's out to static fields
2049 k->initialize(CHECK_NULL);
2050
2051 fieldDescriptor fd;
2052 if (!k->is_instance_klass() ||
2053 !InstanceKlass::cast(k)->find_field(fieldname, signame, true, &fd)) {
2054 THROW_MSG_0(vmSymbols::java_lang_NoSuchFieldError(), (char*) name);
2055 }
2056
2057 // A jfieldID for a static field is a JNIid specifying the field holder and the offset within the Klass*
2058 JNIid* id = fd.field_holder()->jni_id_for(fd.offset());
2059 debug_only(id->set_is_static_field_id();)
2060
2061 debug_only(id->verify(fd.field_holder()));
2062
2063 ret = jfieldIDWorkaround::to_static_jfieldID(id);
2064 return ret;
2065 JNI_END
2066
2067
2068 JNI_ENTRY(jobject, jni_GetStaticObjectField(JNIEnv *env, jclass clazz, jfieldID fieldID))
2069 HOTSPOT_JNI_GETSTATICOBJECTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID);
2070 #if INCLUDE_JNI_CHECK
2071 DEBUG_ONLY(Klass* param_k = jniCheck::validate_class(thread, clazz);)
2072 #endif // INCLUDE_JNI_CHECK
2073 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID);
2074 assert(id->is_static_field_id(), "invalid static field id");
2075 // Keep JVMTI addition small and only check enabled flag here.
2076 // jni_GetField_probe() assumes that is okay to create handles.
2077 if (JvmtiExport::should_post_field_access()) {
2078 JvmtiExport::jni_GetField_probe(thread, nullptr, nullptr, id->holder(), fieldID, true);
2079 }
2080 jobject ret = JNIHandles::make_local(THREAD, id->holder()->java_mirror()->obj_field(id->offset()));
2081 HOTSPOT_JNI_GETSTATICOBJECTFIELD_RETURN(ret);
2082 return ret;
2083 JNI_END
2084
2085
2086 #define DEFINE_GETSTATICFIELD(Return,Fieldname,Result \
2087 , EntryProbe, ReturnProbe) \
2088 \
2089 DT_RETURN_MARK_DECL_FOR(Result, GetStatic##Result##Field, Return \
2090 , ReturnProbe); \
2091 \
2092 JNI_ENTRY(Return, jni_GetStatic##Result##Field(JNIEnv *env, jclass clazz, jfieldID fieldID)) \
2093 EntryProbe; \
2094 Return ret = 0;\
2095 DT_RETURN_MARK_FOR(Result, GetStatic##Result##Field, Return, \
2096 (const Return&)ret);\
2097 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID); \
2098 assert(id->is_static_field_id(), "invalid static field id"); \
2099 /* Keep JVMTI addition small and only check enabled flag here. */ \
2100 /* jni_GetField_probe() assumes that is okay to create handles. */ \
2101 if (JvmtiExport::should_post_field_access()) { \
2102 JvmtiExport::jni_GetField_probe(thread, nullptr, nullptr, id->holder(), fieldID, true); \
2103 } \
2104 ret = id->holder()->java_mirror()-> Fieldname##_field (id->offset()); \
2105 return ret;\
2106 JNI_END
2107
2108 DEFINE_GETSTATICFIELD(jboolean, bool, Boolean
2109 , HOTSPOT_JNI_GETSTATICBOOLEANFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICBOOLEANFIELD_RETURN(_ret_ref))
2110 DEFINE_GETSTATICFIELD(jbyte, byte, Byte
2111 , HOTSPOT_JNI_GETSTATICBYTEFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICBYTEFIELD_RETURN(_ret_ref) )
2112 DEFINE_GETSTATICFIELD(jchar, char, Char
2113 , HOTSPOT_JNI_GETSTATICCHARFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICCHARFIELD_RETURN(_ret_ref) )
2114 DEFINE_GETSTATICFIELD(jshort, short, Short
2115 , HOTSPOT_JNI_GETSTATICSHORTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICSHORTFIELD_RETURN(_ret_ref) )
2116 DEFINE_GETSTATICFIELD(jint, int, Int
2117 , HOTSPOT_JNI_GETSTATICINTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICINTFIELD_RETURN(_ret_ref) )
2118 DEFINE_GETSTATICFIELD(jlong, long, Long
2119 , HOTSPOT_JNI_GETSTATICLONGFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICLONGFIELD_RETURN(_ret_ref) )
2120 // Float and double probes don't return value because dtrace doesn't currently support it
2121 DEFINE_GETSTATICFIELD(jfloat, float, Float
2122 , HOTSPOT_JNI_GETSTATICFLOATFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICFLOATFIELD_RETURN() )
2123 DEFINE_GETSTATICFIELD(jdouble, double, Double
2124 , HOTSPOT_JNI_GETSTATICDOUBLEFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICDOUBLEFIELD_RETURN() )
2125
2126 JNI_ENTRY(void, jni_SetStaticObjectField(JNIEnv *env, jclass clazz, jfieldID fieldID, jobject value))
2127 HOTSPOT_JNI_SETSTATICOBJECTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value);
2128 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID);
2129 assert(id->is_static_field_id(), "invalid static field id");
2130 // Keep JVMTI addition small and only check enabled flag here.
2131 // jni_SetField_probe() assumes that is okay to create handles.
2132 if (JvmtiExport::should_post_field_modification()) {
2133 jvalue field_value;
2134 field_value.l = value;
2135 JvmtiExport::jni_SetField_probe(thread, nullptr, nullptr, id->holder(), fieldID, true, JVM_SIGNATURE_CLASS, (jvalue *)&field_value);
2136 }
2137 id->holder()->java_mirror()->obj_field_put(id->offset(), JNIHandles::resolve(value));
2138 HOTSPOT_JNI_SETSTATICOBJECTFIELD_RETURN();
2139 JNI_END
2140
2141
2142
2143 #define DEFINE_SETSTATICFIELD(Argument,Fieldname,Result,SigType,unionType \
2144 , EntryProbe, ReturnProbe) \
2145 \
2146 JNI_ENTRY(void, jni_SetStatic##Result##Field(JNIEnv *env, jclass clazz, jfieldID fieldID, Argument value)) \
2147 EntryProbe; \
2148 \
2149 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID); \
2150 assert(id->is_static_field_id(), "invalid static field id"); \
2151 /* Keep JVMTI addition small and only check enabled flag here. */ \
2152 /* jni_SetField_probe() assumes that is okay to create handles. */ \
2153 if (JvmtiExport::should_post_field_modification()) { \
2154 jvalue field_value; \
2155 field_value.unionType = value; \
2156 JvmtiExport::jni_SetField_probe(thread, nullptr, nullptr, id->holder(), fieldID, true, SigType, (jvalue *)&field_value); \
2157 } \
2158 id->holder()->java_mirror()-> Fieldname##_field_put (id->offset(), value); \
2159 ReturnProbe;\
2160 JNI_END
2161
2162 DEFINE_SETSTATICFIELD(jboolean, bool, Boolean, JVM_SIGNATURE_BOOLEAN, z
2163 , HOTSPOT_JNI_SETSTATICBOOLEANFIELD_ENTRY(env, clazz, (uintptr_t)fieldID, value),
2164 HOTSPOT_JNI_SETSTATICBOOLEANFIELD_RETURN())
2165 DEFINE_SETSTATICFIELD(jbyte, byte, Byte, JVM_SIGNATURE_BYTE, b
2166 , HOTSPOT_JNI_SETSTATICBYTEFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value),
2167 HOTSPOT_JNI_SETSTATICBYTEFIELD_RETURN())
2168 DEFINE_SETSTATICFIELD(jchar, char, Char, JVM_SIGNATURE_CHAR, c
2169 , HOTSPOT_JNI_SETSTATICCHARFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value),
2170 HOTSPOT_JNI_SETSTATICCHARFIELD_RETURN())
2171 DEFINE_SETSTATICFIELD(jshort, short, Short, JVM_SIGNATURE_SHORT, s
2172 , HOTSPOT_JNI_SETSTATICSHORTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value),
2173 HOTSPOT_JNI_SETSTATICSHORTFIELD_RETURN())
2174 DEFINE_SETSTATICFIELD(jint, int, Int, JVM_SIGNATURE_INT, i
2175 , HOTSPOT_JNI_SETSTATICINTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value),
2176 HOTSPOT_JNI_SETSTATICINTFIELD_RETURN())
2177 DEFINE_SETSTATICFIELD(jlong, long, Long, JVM_SIGNATURE_LONG, j
2178 , HOTSPOT_JNI_SETSTATICLONGFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value),
2179 HOTSPOT_JNI_SETSTATICLONGFIELD_RETURN())
2180 // Float and double probes don't return value because dtrace doesn't currently support it
2181 DEFINE_SETSTATICFIELD(jfloat, float, Float, JVM_SIGNATURE_FLOAT, f
2182 , HOTSPOT_JNI_SETSTATICFLOATFIELD_ENTRY(env, clazz, (uintptr_t) fieldID),
2183 HOTSPOT_JNI_SETSTATICFLOATFIELD_RETURN())
2184 DEFINE_SETSTATICFIELD(jdouble, double, Double, JVM_SIGNATURE_DOUBLE, d
2185 , HOTSPOT_JNI_SETSTATICDOUBLEFIELD_ENTRY(env, clazz, (uintptr_t) fieldID),
2186 HOTSPOT_JNI_SETSTATICDOUBLEFIELD_RETURN())
2187
2188 //
2189 // String Operations
2190 //
2191
2192 // Unicode Interface
2193
2194 DT_RETURN_MARK_DECL(NewString, jstring
2195 , HOTSPOT_JNI_NEWSTRING_RETURN(_ret_ref));
2196
2197 JNI_ENTRY(jstring, jni_NewString(JNIEnv *env, const jchar *unicodeChars, jsize len))
2198 HOTSPOT_JNI_NEWSTRING_ENTRY(env, (uint16_t *) unicodeChars, len);
2199 jstring ret = nullptr;
2200 DT_RETURN_MARK(NewString, jstring, (const jstring&)ret);
2201 oop string=java_lang_String::create_oop_from_unicode((jchar*) unicodeChars, len, CHECK_NULL);
2202 ret = (jstring) JNIHandles::make_local(THREAD, string);
2203 return ret;
2204 JNI_END
2205
2206
2207 JNI_ENTRY_NO_PRESERVE(jsize, jni_GetStringLength(JNIEnv *env, jstring string))
2208 HOTSPOT_JNI_GETSTRINGLENGTH_ENTRY(env, string);
2209 jsize ret = 0;
2210 oop s = JNIHandles::resolve_non_null(string);
2211 ret = java_lang_String::length(s);
2212 HOTSPOT_JNI_GETSTRINGLENGTH_RETURN(ret);
2213 return ret;
2214 JNI_END
2215
2216
2217 JNI_ENTRY_NO_PRESERVE(const jchar*, jni_GetStringChars(
2218 JNIEnv *env, jstring string, jboolean *isCopy))
2219 HOTSPOT_JNI_GETSTRINGCHARS_ENTRY(env, string, (uintptr_t *) isCopy);
2220 jchar* buf = nullptr;
2221 oop s = JNIHandles::resolve_non_null(string);
2222 typeArrayOop s_value = java_lang_String::value(s);
2223 if (s_value != nullptr) {
2224 int s_len = java_lang_String::length(s, s_value);
2225 bool is_latin1 = java_lang_String::is_latin1(s);
2226 buf = NEW_C_HEAP_ARRAY_RETURN_NULL(jchar, s_len + 1, mtInternal); // add one for zero termination
2227 /* JNI Specification states return null on OOM */
2228 if (buf != nullptr) {
2229 if (s_len > 0) {
2230 if (!is_latin1) {
2231 ArrayAccess<>::arraycopy_to_native(s_value, (size_t) typeArrayOopDesc::element_offset<jchar>(0),
2232 buf, s_len);
2233 } else {
2234 for (int i = 0; i < s_len; i++) {
2235 buf[i] = ((jchar) s_value->byte_at(i)) & 0xff;
2236 }
2237 }
2238 }
2239 buf[s_len] = 0;
2240 //%note jni_5
2241 if (isCopy != nullptr) {
2242 *isCopy = JNI_TRUE;
2243 }
2244 }
2245 }
2246 HOTSPOT_JNI_GETSTRINGCHARS_RETURN(buf);
2247 return buf;
2248 JNI_END
2249
2250
2251 JNI_ENTRY_NO_PRESERVE(void, jni_ReleaseStringChars(JNIEnv *env, jstring str, const jchar *chars))
2252 HOTSPOT_JNI_RELEASESTRINGCHARS_ENTRY(env, str, (uint16_t *) chars);
2253 //%note jni_6
2254 if (chars != nullptr) {
2255 // Since String objects are supposed to be immutable, don't copy any
2256 // new data back. A bad user will have to go after the char array.
2257 FreeHeap((void*) chars);
2258 }
2259 HOTSPOT_JNI_RELEASESTRINGCHARS_RETURN();
2260 JNI_END
2261
2262
2263 // UTF Interface
2264
2265 DT_RETURN_MARK_DECL(NewStringUTF, jstring
2266 , HOTSPOT_JNI_NEWSTRINGUTF_RETURN(_ret_ref));
2267
2268 JNI_ENTRY(jstring, jni_NewStringUTF(JNIEnv *env, const char *bytes))
2269 HOTSPOT_JNI_NEWSTRINGUTF_ENTRY(env, (char *) bytes);
2270 jstring ret;
2271 DT_RETURN_MARK(NewStringUTF, jstring, (const jstring&)ret);
2272
2273 oop result = java_lang_String::create_oop_from_str((char*) bytes, CHECK_NULL);
2274 ret = (jstring) JNIHandles::make_local(THREAD, result);
2275 return ret;
2276 JNI_END
2277
2278
2279 JNI_ENTRY(jsize, jni_GetStringUTFLength(JNIEnv *env, jstring string))
2280 HOTSPOT_JNI_GETSTRINGUTFLENGTH_ENTRY(env, string);
2281 oop java_string = JNIHandles::resolve_non_null(string);
2282 jsize ret = java_lang_String::utf8_length(java_string);
2283 HOTSPOT_JNI_GETSTRINGUTFLENGTH_RETURN(ret);
2284 return ret;
2285 JNI_END
2286
2287
2288 JNI_ENTRY(const char*, jni_GetStringUTFChars(JNIEnv *env, jstring string, jboolean *isCopy))
2289 HOTSPOT_JNI_GETSTRINGUTFCHARS_ENTRY(env, string, (uintptr_t *) isCopy);
2290 char* result = nullptr;
2291 oop java_string = JNIHandles::resolve_non_null(string);
2292 typeArrayOop s_value = java_lang_String::value(java_string);
2293 if (s_value != nullptr) {
2294 size_t length = java_lang_String::utf8_length(java_string, s_value);
2295 /* JNI Specification states return null on OOM */
2296 result = AllocateHeap(length + 1, mtInternal, AllocFailStrategy::RETURN_NULL);
2297 if (result != nullptr) {
2298 java_lang_String::as_utf8_string(java_string, s_value, result, (int) length + 1);
2299 if (isCopy != nullptr) {
2300 *isCopy = JNI_TRUE;
2301 }
2302 }
2303 }
2304 HOTSPOT_JNI_GETSTRINGUTFCHARS_RETURN(result);
2305 return result;
2306 JNI_END
2307
2308
2309 JNI_LEAF(void, jni_ReleaseStringUTFChars(JNIEnv *env, jstring str, const char *chars))
2310 HOTSPOT_JNI_RELEASESTRINGUTFCHARS_ENTRY(env, str, (char *) chars);
2311 if (chars != nullptr) {
2312 FreeHeap((char*) chars);
2313 }
2314 HOTSPOT_JNI_RELEASESTRINGUTFCHARS_RETURN();
2315 JNI_END
2316
2317
2318 JNI_ENTRY_NO_PRESERVE(jsize, jni_GetArrayLength(JNIEnv *env, jarray array))
2319 HOTSPOT_JNI_GETARRAYLENGTH_ENTRY(env, array);
2320 arrayOop a = arrayOop(JNIHandles::resolve_non_null(array));
2321 assert(a->is_array(), "must be array");
2322 jsize ret = a->length();
2323 HOTSPOT_JNI_GETARRAYLENGTH_RETURN(ret);
2324 return ret;
2325 JNI_END
2326
2327
2328 //
2329 // Object Array Operations
2330 //
2331
2332 DT_RETURN_MARK_DECL(NewObjectArray, jobjectArray
2333 , HOTSPOT_JNI_NEWOBJECTARRAY_RETURN(_ret_ref));
2334
2335 JNI_ENTRY(jobjectArray, jni_NewObjectArray(JNIEnv *env, jsize length, jclass elementClass, jobject initialElement))
2336 HOTSPOT_JNI_NEWOBJECTARRAY_ENTRY(env, length, elementClass, initialElement);
2337 jobjectArray ret = nullptr;
2338 DT_RETURN_MARK(NewObjectArray, jobjectArray, (const jobjectArray&)ret);
2339 Klass* ek = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(elementClass));
2340 Klass* ak = ek->array_klass(CHECK_NULL);
2341 ObjArrayKlass::cast(ak)->initialize(CHECK_NULL);
2342 objArrayOop result = ObjArrayKlass::cast(ak)->allocate(length, CHECK_NULL);
2343 oop initial_value = JNIHandles::resolve(initialElement);
2344 if (initial_value != nullptr) { // array already initialized with null
2345 for (int index = 0; index < length; index++) {
2346 result->obj_at_put(index, initial_value);
2347 }
2348 }
2349 ret = (jobjectArray) JNIHandles::make_local(THREAD, result);
2350 return ret;
2351 JNI_END
2352
2353 DT_RETURN_MARK_DECL(GetObjectArrayElement, jobject
2354 , HOTSPOT_JNI_GETOBJECTARRAYELEMENT_RETURN(_ret_ref));
2355
2356 JNI_ENTRY(jobject, jni_GetObjectArrayElement(JNIEnv *env, jobjectArray array, jsize index))
2357 HOTSPOT_JNI_GETOBJECTARRAYELEMENT_ENTRY(env, array, index);
2358 jobject ret = nullptr;
2359 DT_RETURN_MARK(GetObjectArrayElement, jobject, (const jobject&)ret);
2360 oop res = nullptr;
2361 arrayOop arr((arrayOop)JNIHandles::resolve_non_null(array));
2362 if (arr->is_within_bounds(index)) {
2363 if (arr->is_flatArray()) {
2364 flatArrayOop a = flatArrayOop(JNIHandles::resolve_non_null(array));
2365 flatArrayHandle vah(thread, a);
2366 res = flatArrayOopDesc::value_alloc_copy_from_index(vah, index, CHECK_NULL);
2367 assert(res != nullptr, "Must be set in one of two paths above");
2368 } else {
2369 assert(arr->is_objArray(), "If not a valueArray. must be an objArray");
2370 objArrayOop a = objArrayOop(JNIHandles::resolve_non_null(array));
2371 res = a->obj_at(index);
2372 }
2373 } else {
2374 ResourceMark rm(THREAD);
2375 stringStream ss;
2376 ss.print("Index %d out of bounds for length %d", index,arr->length());
2377 THROW_MSG_0(vmSymbols::java_lang_ArrayIndexOutOfBoundsException(), ss.as_string());
2378 }
2379 ret = JNIHandles::make_local(THREAD, res);
2380 return ret;
2381 JNI_END
2382
2383 DT_VOID_RETURN_MARK_DECL(SetObjectArrayElement
2384 , HOTSPOT_JNI_SETOBJECTARRAYELEMENT_RETURN());
2385
2386 JNI_ENTRY(void, jni_SetObjectArrayElement(JNIEnv *env, jobjectArray array, jsize index, jobject value))
2387 HOTSPOT_JNI_SETOBJECTARRAYELEMENT_ENTRY(env, array, index, value);
2388 DT_VOID_RETURN_MARK(SetObjectArrayElement);
2389
2390 bool oob = false;
2391 int length = -1;
2392 oop res = nullptr;
2393 arrayOop arr((arrayOop)JNIHandles::resolve_non_null(array));
2394 if (arr->is_within_bounds(index)) {
2395 if (arr->is_flatArray()) {
2396 flatArrayOop a = flatArrayOop(JNIHandles::resolve_non_null(array));
2397 oop v = JNIHandles::resolve(value);
2398 FlatArrayKlass* vaklass = FlatArrayKlass::cast(a->klass());
2399 InlineKlass* element_vklass = vaklass->element_klass();
2400 if (v != nullptr && v->is_a(element_vklass)) {
2401 a->value_copy_to_index(v, index);
2402 } else {
2403 ResourceMark rm(THREAD);
2404 stringStream ss;
2405 Klass *kl = FlatArrayKlass::cast(a->klass());
2406 ss.print("type mismatch: can not store %s to %s[%d]",
2407 v->klass()->external_name(),
2408 kl->external_name(),
2409 index);
2410 for (int dims = ArrayKlass::cast(a->klass())->dimension(); dims > 1; --dims) {
2411 ss.print("[]");
2412 }
2413 THROW_MSG(vmSymbols::java_lang_ArrayStoreException(), ss.as_string());
2414 }
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 a->obj_at_put(index, v);
2421 } else {
2422 ResourceMark rm(THREAD);
2423 stringStream ss;
2424 Klass *bottom_kl = ObjArrayKlass::cast(a->klass())->bottom_klass();
2425 ss.print("type mismatch: can not store %s to %s[%d]",
2426 v->klass()->external_name(),
2427 bottom_kl->is_typeArray_klass() ? type2name_tab[ArrayKlass::cast(bottom_kl)->element_type()] : bottom_kl->external_name(),
2428 index);
2429 for (int dims = ArrayKlass::cast(a->klass())->dimension(); dims > 1; --dims) {
2430 ss.print("[]");
2431 }
2432 THROW_MSG(vmSymbols::java_lang_ArrayStoreException(), ss.as_string());
2433 }
2434 }
2435 } else {
2436 ResourceMark rm(THREAD);
2437 stringStream ss;
2438 ss.print("Index %d out of bounds for length %d", index, arr->length());
2439 THROW_MSG(vmSymbols::java_lang_ArrayIndexOutOfBoundsException(), ss.as_string());
2440 }
2441 JNI_END
2442
2443
2444
2445 #define DEFINE_NEWSCALARARRAY(Return,Allocator,Result \
2446 ,EntryProbe,ReturnProbe) \
2447 \
2448 DT_RETURN_MARK_DECL(New##Result##Array, Return \
2449 , ReturnProbe); \
2450 \
2451 JNI_ENTRY(Return, \
2452 jni_New##Result##Array(JNIEnv *env, jsize len)) \
2453 EntryProbe; \
2454 Return ret = nullptr;\
2455 DT_RETURN_MARK(New##Result##Array, Return, (const Return&)ret);\
2456 \
2457 oop obj= oopFactory::Allocator(len, CHECK_NULL); \
2458 ret = (Return) JNIHandles::make_local(THREAD, obj); \
2459 return ret;\
2460 JNI_END
2461
2462 DEFINE_NEWSCALARARRAY(jbooleanArray, new_boolArray, Boolean,
2463 HOTSPOT_JNI_NEWBOOLEANARRAY_ENTRY(env, len),
2464 HOTSPOT_JNI_NEWBOOLEANARRAY_RETURN(_ret_ref))
2465 DEFINE_NEWSCALARARRAY(jbyteArray, new_byteArray, Byte,
2466 HOTSPOT_JNI_NEWBYTEARRAY_ENTRY(env, len),
2467 HOTSPOT_JNI_NEWBYTEARRAY_RETURN(_ret_ref))
2468 DEFINE_NEWSCALARARRAY(jshortArray, new_shortArray, Short,
2469 HOTSPOT_JNI_NEWSHORTARRAY_ENTRY(env, len),
2470 HOTSPOT_JNI_NEWSHORTARRAY_RETURN(_ret_ref))
2471 DEFINE_NEWSCALARARRAY(jcharArray, new_charArray, Char,
2472 HOTSPOT_JNI_NEWCHARARRAY_ENTRY(env, len),
2473 HOTSPOT_JNI_NEWCHARARRAY_RETURN(_ret_ref))
2474 DEFINE_NEWSCALARARRAY(jintArray, new_intArray, Int,
2475 HOTSPOT_JNI_NEWINTARRAY_ENTRY(env, len),
2476 HOTSPOT_JNI_NEWINTARRAY_RETURN(_ret_ref))
2477 DEFINE_NEWSCALARARRAY(jlongArray, new_longArray, Long,
2478 HOTSPOT_JNI_NEWLONGARRAY_ENTRY(env, len),
2479 HOTSPOT_JNI_NEWLONGARRAY_RETURN(_ret_ref))
2480 DEFINE_NEWSCALARARRAY(jfloatArray, new_floatArray, Float,
2481 HOTSPOT_JNI_NEWFLOATARRAY_ENTRY(env, len),
2482 HOTSPOT_JNI_NEWFLOATARRAY_RETURN(_ret_ref))
2483 DEFINE_NEWSCALARARRAY(jdoubleArray, new_doubleArray, Double,
2484 HOTSPOT_JNI_NEWDOUBLEARRAY_ENTRY(env, len),
2485 HOTSPOT_JNI_NEWDOUBLEARRAY_RETURN(_ret_ref))
2486
2487 // Return an address which will fault if the caller writes to it.
2488
2489 static char* get_bad_address() {
2490 static char* bad_address = nullptr;
2491 if (bad_address == nullptr) {
2492 size_t size = os::vm_allocation_granularity();
2493 bad_address = os::reserve_memory(size);
2494 if (bad_address != nullptr) {
2495 os::protect_memory(bad_address, size, os::MEM_PROT_READ,
2496 /*is_committed*/false);
2497 MemTracker::record_virtual_memory_type((void*)bad_address, mtInternal);
2498 }
2499 }
2500 return bad_address;
2501 }
2502
2503
2504
2505 #define DEFINE_GETSCALARARRAYELEMENTS(ElementTag,ElementType,Result, Tag \
2506 , EntryProbe, ReturnProbe) \
2507 \
2508 JNI_ENTRY_NO_PRESERVE(ElementType*, \
2509 jni_Get##Result##ArrayElements(JNIEnv *env, ElementType##Array array, jboolean *isCopy)) \
2510 EntryProbe; \
2511 /* allocate an chunk of memory in c land */ \
2512 typeArrayOop a = typeArrayOop(JNIHandles::resolve_non_null(array)); \
2513 ElementType* result; \
2514 int len = a->length(); \
2515 if (len == 0) { \
2516 if (isCopy != nullptr) { \
2517 *isCopy = JNI_FALSE; \
2518 } \
2519 /* Empty array: legal but useless, can't return null. \
2520 * Return a pointer to something useless. \
2521 * Avoid asserts in typeArrayOop. */ \
2522 result = (ElementType*)get_bad_address(); \
2523 } else { \
2524 /* JNI Specification states return null on OOM */ \
2525 result = NEW_C_HEAP_ARRAY_RETURN_NULL(ElementType, len, mtInternal); \
2526 if (result != nullptr) { \
2527 /* copy the array to the c chunk */ \
2528 ArrayAccess<>::arraycopy_to_native(a, typeArrayOopDesc::element_offset<ElementType>(0), \
2529 result, len); \
2530 if (isCopy) { \
2531 *isCopy = JNI_TRUE; \
2532 } \
2533 } \
2534 } \
2535 ReturnProbe; \
2536 return result; \
2537 JNI_END
2538
2539 DEFINE_GETSCALARARRAYELEMENTS(T_BOOLEAN, jboolean, Boolean, bool
2540 , HOTSPOT_JNI_GETBOOLEANARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy),
2541 HOTSPOT_JNI_GETBOOLEANARRAYELEMENTS_RETURN((uintptr_t*)result))
2542 DEFINE_GETSCALARARRAYELEMENTS(T_BYTE, jbyte, Byte, byte
2543 , HOTSPOT_JNI_GETBYTEARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy),
2544 HOTSPOT_JNI_GETBYTEARRAYELEMENTS_RETURN((char*)result))
2545 DEFINE_GETSCALARARRAYELEMENTS(T_SHORT, jshort, Short, short
2546 , HOTSPOT_JNI_GETSHORTARRAYELEMENTS_ENTRY(env, (uint16_t*) array, (uintptr_t *) isCopy),
2547 HOTSPOT_JNI_GETSHORTARRAYELEMENTS_RETURN((uint16_t*)result))
2548 DEFINE_GETSCALARARRAYELEMENTS(T_CHAR, jchar, Char, char
2549 , HOTSPOT_JNI_GETCHARARRAYELEMENTS_ENTRY(env, (uint16_t*) array, (uintptr_t *) isCopy),
2550 HOTSPOT_JNI_GETCHARARRAYELEMENTS_RETURN(result))
2551 DEFINE_GETSCALARARRAYELEMENTS(T_INT, jint, Int, int
2552 , HOTSPOT_JNI_GETINTARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy),
2553 HOTSPOT_JNI_GETINTARRAYELEMENTS_RETURN((uint32_t*)result))
2554 DEFINE_GETSCALARARRAYELEMENTS(T_LONG, jlong, Long, long
2555 , HOTSPOT_JNI_GETLONGARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy),
2556 HOTSPOT_JNI_GETLONGARRAYELEMENTS_RETURN(((uintptr_t*)result)))
2557 // Float and double probes don't return value because dtrace doesn't currently support it
2558 DEFINE_GETSCALARARRAYELEMENTS(T_FLOAT, jfloat, Float, float
2559 , HOTSPOT_JNI_GETFLOATARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy),
2560 HOTSPOT_JNI_GETFLOATARRAYELEMENTS_RETURN(result))
2561 DEFINE_GETSCALARARRAYELEMENTS(T_DOUBLE, jdouble, Double, double
2562 , HOTSPOT_JNI_GETDOUBLEARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy),
2563 HOTSPOT_JNI_GETDOUBLEARRAYELEMENTS_RETURN(result))
2564
2565
2566 #define DEFINE_RELEASESCALARARRAYELEMENTS(ElementTag,ElementType,Result,Tag \
2567 , EntryProbe, ReturnProbe);\
2568 \
2569 JNI_ENTRY_NO_PRESERVE(void, \
2570 jni_Release##Result##ArrayElements(JNIEnv *env, ElementType##Array array, \
2571 ElementType *buf, jint mode)) \
2572 EntryProbe; \
2573 typeArrayOop a = typeArrayOop(JNIHandles::resolve_non_null(array)); \
2574 int len = a->length(); \
2575 if (len != 0) { /* Empty array: nothing to free or copy. */ \
2576 if ((mode == 0) || (mode == JNI_COMMIT)) { \
2577 ArrayAccess<>::arraycopy_from_native(buf, a, typeArrayOopDesc::element_offset<ElementType>(0), len); \
2578 } \
2579 if ((mode == 0) || (mode == JNI_ABORT)) { \
2580 FreeHeap(buf); \
2581 } \
2582 } \
2583 ReturnProbe; \
2584 JNI_END
2585
2586 DEFINE_RELEASESCALARARRAYELEMENTS(T_BOOLEAN, jboolean, Boolean, bool
2587 , HOTSPOT_JNI_RELEASEBOOLEANARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) buf, mode),
2588 HOTSPOT_JNI_RELEASEBOOLEANARRAYELEMENTS_RETURN())
2589 DEFINE_RELEASESCALARARRAYELEMENTS(T_BYTE, jbyte, Byte, byte
2590 , HOTSPOT_JNI_RELEASEBYTEARRAYELEMENTS_ENTRY(env, array, (char *) buf, mode),
2591 HOTSPOT_JNI_RELEASEBYTEARRAYELEMENTS_RETURN())
2592 DEFINE_RELEASESCALARARRAYELEMENTS(T_SHORT, jshort, Short, short
2593 , HOTSPOT_JNI_RELEASESHORTARRAYELEMENTS_ENTRY(env, array, (uint16_t *) buf, mode),
2594 HOTSPOT_JNI_RELEASESHORTARRAYELEMENTS_RETURN())
2595 DEFINE_RELEASESCALARARRAYELEMENTS(T_CHAR, jchar, Char, char
2596 , HOTSPOT_JNI_RELEASECHARARRAYELEMENTS_ENTRY(env, array, (uint16_t *) buf, mode),
2597 HOTSPOT_JNI_RELEASECHARARRAYELEMENTS_RETURN())
2598 DEFINE_RELEASESCALARARRAYELEMENTS(T_INT, jint, Int, int
2599 , HOTSPOT_JNI_RELEASEINTARRAYELEMENTS_ENTRY(env, array, (uint32_t *) buf, mode),
2600 HOTSPOT_JNI_RELEASEINTARRAYELEMENTS_RETURN())
2601 DEFINE_RELEASESCALARARRAYELEMENTS(T_LONG, jlong, Long, long
2602 , HOTSPOT_JNI_RELEASELONGARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) buf, mode),
2603 HOTSPOT_JNI_RELEASELONGARRAYELEMENTS_RETURN())
2604 DEFINE_RELEASESCALARARRAYELEMENTS(T_FLOAT, jfloat, Float, float
2605 , HOTSPOT_JNI_RELEASEFLOATARRAYELEMENTS_ENTRY(env, array, (float *) buf, mode),
2606 HOTSPOT_JNI_RELEASEFLOATARRAYELEMENTS_RETURN())
2607 DEFINE_RELEASESCALARARRAYELEMENTS(T_DOUBLE, jdouble, Double, double
2608 , HOTSPOT_JNI_RELEASEDOUBLEARRAYELEMENTS_ENTRY(env, array, (double *) buf, mode),
2609 HOTSPOT_JNI_RELEASEDOUBLEARRAYELEMENTS_RETURN())
2610
2611 static void check_bounds(jsize start, jsize copy_len, jsize array_len, TRAPS) {
2612 ResourceMark rm(THREAD);
2613 if (copy_len < 0) {
2614 stringStream ss;
2615 ss.print("Length %d is negative", copy_len);
2616 THROW_MSG(vmSymbols::java_lang_ArrayIndexOutOfBoundsException(), ss.as_string());
2617 } else if (start < 0 || (start > array_len - copy_len)) {
2618 stringStream ss;
2619 ss.print("Array region %d.." INT64_FORMAT " out of bounds for length %d",
2620 start, (int64_t)start+(int64_t)copy_len, array_len);
2621 THROW_MSG(vmSymbols::java_lang_ArrayIndexOutOfBoundsException(), ss.as_string());
2622 }
2623 }
2624
2625 #define DEFINE_GETSCALARARRAYREGION(ElementTag,ElementType,Result, Tag \
2626 , EntryProbe, ReturnProbe); \
2627 DT_VOID_RETURN_MARK_DECL(Get##Result##ArrayRegion \
2628 , ReturnProbe); \
2629 \
2630 JNI_ENTRY(void, \
2631 jni_Get##Result##ArrayRegion(JNIEnv *env, ElementType##Array array, jsize start, \
2632 jsize len, ElementType *buf)) \
2633 EntryProbe; \
2634 DT_VOID_RETURN_MARK(Get##Result##ArrayRegion); \
2635 typeArrayOop src = typeArrayOop(JNIHandles::resolve_non_null(array)); \
2636 check_bounds(start, len, src->length(), CHECK); \
2637 if (len > 0) { \
2638 ArrayAccess<>::arraycopy_to_native(src, typeArrayOopDesc::element_offset<ElementType>(start), buf, len); \
2639 } \
2640 JNI_END
2641
2642 DEFINE_GETSCALARARRAYREGION(T_BOOLEAN, jboolean,Boolean, bool
2643 , HOTSPOT_JNI_GETBOOLEANARRAYREGION_ENTRY(env, array, start, len, (uintptr_t *) buf),
2644 HOTSPOT_JNI_GETBOOLEANARRAYREGION_RETURN());
2645 DEFINE_GETSCALARARRAYREGION(T_BYTE, jbyte, Byte, byte
2646 , HOTSPOT_JNI_GETBYTEARRAYREGION_ENTRY(env, array, start, len, (char *) buf),
2647 HOTSPOT_JNI_GETBYTEARRAYREGION_RETURN());
2648 DEFINE_GETSCALARARRAYREGION(T_SHORT, jshort, Short, short
2649 , HOTSPOT_JNI_GETSHORTARRAYREGION_ENTRY(env, array, start, len, (uint16_t *) buf),
2650 HOTSPOT_JNI_GETSHORTARRAYREGION_RETURN());
2651 DEFINE_GETSCALARARRAYREGION(T_CHAR, jchar, Char, char
2652 , HOTSPOT_JNI_GETCHARARRAYREGION_ENTRY(env, array, start, len, (uint16_t*) buf),
2653 HOTSPOT_JNI_GETCHARARRAYREGION_RETURN());
2654 DEFINE_GETSCALARARRAYREGION(T_INT, jint, Int, int
2655 , HOTSPOT_JNI_GETINTARRAYREGION_ENTRY(env, array, start, len, (uint32_t*) buf),
2656 HOTSPOT_JNI_GETINTARRAYREGION_RETURN());
2657 DEFINE_GETSCALARARRAYREGION(T_LONG, jlong, Long, long
2658 , HOTSPOT_JNI_GETLONGARRAYREGION_ENTRY(env, array, start, len, (uintptr_t *) buf),
2659 HOTSPOT_JNI_GETLONGARRAYREGION_RETURN());
2660 DEFINE_GETSCALARARRAYREGION(T_FLOAT, jfloat, Float, float
2661 , HOTSPOT_JNI_GETFLOATARRAYREGION_ENTRY(env, array, start, len, (float *) buf),
2662 HOTSPOT_JNI_GETFLOATARRAYREGION_RETURN());
2663 DEFINE_GETSCALARARRAYREGION(T_DOUBLE, jdouble, Double, double
2664 , HOTSPOT_JNI_GETDOUBLEARRAYREGION_ENTRY(env, array, start, len, (double *) buf),
2665 HOTSPOT_JNI_GETDOUBLEARRAYREGION_RETURN());
2666
2667
2668 #define DEFINE_SETSCALARARRAYREGION(ElementTag,ElementType,Result, Tag \
2669 , EntryProbe, ReturnProbe); \
2670 DT_VOID_RETURN_MARK_DECL(Set##Result##ArrayRegion \
2671 ,ReturnProbe); \
2672 \
2673 JNI_ENTRY(void, \
2674 jni_Set##Result##ArrayRegion(JNIEnv *env, ElementType##Array array, jsize start, \
2675 jsize len, const ElementType *buf)) \
2676 EntryProbe; \
2677 DT_VOID_RETURN_MARK(Set##Result##ArrayRegion); \
2678 typeArrayOop dst = typeArrayOop(JNIHandles::resolve_non_null(array)); \
2679 check_bounds(start, len, dst->length(), CHECK); \
2680 if (len > 0) { \
2681 ArrayAccess<>::arraycopy_from_native(buf, dst, typeArrayOopDesc::element_offset<ElementType>(start), len); \
2682 } \
2683 JNI_END
2684
2685 DEFINE_SETSCALARARRAYREGION(T_BOOLEAN, jboolean, Boolean, bool
2686 , HOTSPOT_JNI_SETBOOLEANARRAYREGION_ENTRY(env, array, start, len, (uintptr_t *)buf),
2687 HOTSPOT_JNI_SETBOOLEANARRAYREGION_RETURN())
2688 DEFINE_SETSCALARARRAYREGION(T_BYTE, jbyte, Byte, byte
2689 , HOTSPOT_JNI_SETBYTEARRAYREGION_ENTRY(env, array, start, len, (char *) buf),
2690 HOTSPOT_JNI_SETBYTEARRAYREGION_RETURN())
2691 DEFINE_SETSCALARARRAYREGION(T_SHORT, jshort, Short, short
2692 , HOTSPOT_JNI_SETSHORTARRAYREGION_ENTRY(env, array, start, len, (uint16_t *) buf),
2693 HOTSPOT_JNI_SETSHORTARRAYREGION_RETURN())
2694 DEFINE_SETSCALARARRAYREGION(T_CHAR, jchar, Char, char
2695 , HOTSPOT_JNI_SETCHARARRAYREGION_ENTRY(env, array, start, len, (uint16_t *) buf),
2696 HOTSPOT_JNI_SETCHARARRAYREGION_RETURN())
2697 DEFINE_SETSCALARARRAYREGION(T_INT, jint, Int, int
2698 , HOTSPOT_JNI_SETINTARRAYREGION_ENTRY(env, array, start, len, (uint32_t *) buf),
2699 HOTSPOT_JNI_SETINTARRAYREGION_RETURN())
2700 DEFINE_SETSCALARARRAYREGION(T_LONG, jlong, Long, long
2701 , HOTSPOT_JNI_SETLONGARRAYREGION_ENTRY(env, array, start, len, (uintptr_t *) buf),
2702 HOTSPOT_JNI_SETLONGARRAYREGION_RETURN())
2703 DEFINE_SETSCALARARRAYREGION(T_FLOAT, jfloat, Float, float
2704 , HOTSPOT_JNI_SETFLOATARRAYREGION_ENTRY(env, array, start, len, (float *) buf),
2705 HOTSPOT_JNI_SETFLOATARRAYREGION_RETURN())
2706 DEFINE_SETSCALARARRAYREGION(T_DOUBLE, jdouble, Double, double
2707 , HOTSPOT_JNI_SETDOUBLEARRAYREGION_ENTRY(env, array, start, len, (double *) buf),
2708 HOTSPOT_JNI_SETDOUBLEARRAYREGION_RETURN())
2709
2710
2711 DT_RETURN_MARK_DECL(RegisterNatives, jint
2712 , HOTSPOT_JNI_REGISTERNATIVES_RETURN(_ret_ref));
2713
2714 JNI_ENTRY(jint, jni_RegisterNatives(JNIEnv *env, jclass clazz,
2715 const JNINativeMethod *methods,
2716 jint nMethods))
2717 HOTSPOT_JNI_REGISTERNATIVES_ENTRY(env, clazz, (void *) methods, nMethods);
2718 jint ret = 0;
2719 DT_RETURN_MARK(RegisterNatives, jint, (const jint&)ret);
2720
2721 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz));
2722
2723 // There are no restrictions on native code registering native methods,
2724 // which allows agents to redefine the bindings to native methods, however
2725 // we issue a warning if any code running outside of the boot/platform
2726 // loader is rebinding any native methods in classes loaded by the
2727 // boot/platform loader that are in named modules. That will catch changes
2728 // to platform classes while excluding classes added to the bootclasspath.
2729 bool do_warning = false;
2730
2731 // Only instanceKlasses can have native methods
2732 if (k->is_instance_klass()) {
2733 oop cl = k->class_loader();
2734 InstanceKlass* ik = InstanceKlass::cast(k);
2735 // Check for a platform class
2736 if ((cl == nullptr || SystemDictionary::is_platform_class_loader(cl)) &&
2737 ik->module()->is_named()) {
2738 Klass* caller = thread->security_get_caller_class(1);
2739 // If no caller class, or caller class has a different loader, then
2740 // issue a warning below.
2741 do_warning = (caller == nullptr) || caller->class_loader() != cl;
2742 }
2743 }
2744
2745
2746 for (int index = 0; index < nMethods; index++) {
2747 const char* meth_name = methods[index].name;
2748 const char* meth_sig = methods[index].signature;
2749 int meth_name_len = (int)strlen(meth_name);
2750
2751 // The class should have been loaded (we have an instance of the class
2752 // passed in) so the method and signature should already be in the symbol
2753 // table. If they're not there, the method doesn't exist.
2754 TempNewSymbol name = SymbolTable::probe(meth_name, meth_name_len);
2755 TempNewSymbol signature = SymbolTable::probe(meth_sig, (int)strlen(meth_sig));
2756
2757 if (name == nullptr || signature == nullptr) {
2758 ResourceMark rm(THREAD);
2759 stringStream st;
2760 st.print("Method %s.%s%s not found", k->external_name(), meth_name, meth_sig);
2761 // Must return negative value on failure
2762 THROW_MSG_(vmSymbols::java_lang_NoSuchMethodError(), st.as_string(), -1);
2763 }
2764
2765 if (do_warning) {
2766 ResourceMark rm(THREAD);
2767 log_warning(jni, resolve)("Re-registering of platform native method: %s.%s%s "
2768 "from code in a different classloader", k->external_name(), meth_name, meth_sig);
2769 }
2770
2771 bool res = Method::register_native(k, name, signature,
2772 (address) methods[index].fnPtr, THREAD);
2773 if (!res) {
2774 ret = -1;
2775 break;
2776 }
2777 }
2778 return ret;
2779 JNI_END
2780
2781
2782 JNI_ENTRY(jint, jni_UnregisterNatives(JNIEnv *env, jclass clazz))
2783 HOTSPOT_JNI_UNREGISTERNATIVES_ENTRY(env, clazz);
2784 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz));
2785 //%note jni_2
2786 if (k->is_instance_klass()) {
2787 for (int index = 0; index < InstanceKlass::cast(k)->methods()->length(); index++) {
2788 Method* m = InstanceKlass::cast(k)->methods()->at(index);
2789 if (m->is_native()) {
2790 m->clear_native_function();
2791 m->set_signature_handler(nullptr);
2792 }
2793 }
2794 }
2795 HOTSPOT_JNI_UNREGISTERNATIVES_RETURN(0);
2796 return 0;
2797 JNI_END
2798
2799 //
2800 // Monitor functions
2801 //
2802
2803 DT_RETURN_MARK_DECL(MonitorEnter, jint
2804 , HOTSPOT_JNI_MONITORENTER_RETURN(_ret_ref));
2805
2806 JNI_ENTRY(jint, jni_MonitorEnter(JNIEnv *env, jobject jobj))
2807 HOTSPOT_JNI_MONITORENTER_ENTRY(env, jobj);
2808 jint ret = JNI_ERR;
2809 DT_RETURN_MARK(MonitorEnter, jint, (const jint&)ret);
2810
2811 // If the object is null, we can't do anything with it
2812 if (jobj == nullptr) {
2813 THROW_(vmSymbols::java_lang_NullPointerException(), JNI_ERR);
2814 }
2815
2816 Handle obj(thread, JNIHandles::resolve_non_null(jobj));
2817 ObjectSynchronizer::jni_enter(obj, thread);
2818 return JNI_OK;
2819 JNI_END
2820
2821 DT_RETURN_MARK_DECL(MonitorExit, jint
2822 , HOTSPOT_JNI_MONITOREXIT_RETURN(_ret_ref));
2823
2824 JNI_ENTRY(jint, jni_MonitorExit(JNIEnv *env, jobject jobj))
2825 HOTSPOT_JNI_MONITOREXIT_ENTRY(env, jobj);
2826 jint ret = JNI_ERR;
2827 DT_RETURN_MARK(MonitorExit, jint, (const jint&)ret);
2828
2829 // Don't do anything with a null object
2830 if (jobj == nullptr) {
2831 THROW_(vmSymbols::java_lang_NullPointerException(), JNI_ERR);
2832 }
2833
2834 Handle obj(THREAD, JNIHandles::resolve_non_null(jobj));
2835 ObjectSynchronizer::jni_exit(obj(), CHECK_(JNI_ERR));
2836 return JNI_OK;
2837 JNI_END
2838
2839 //
2840 // Extensions
2841 //
2842
2843 DT_VOID_RETURN_MARK_DECL(GetStringRegion
2844 , HOTSPOT_JNI_GETSTRINGREGION_RETURN());
2845
2846 JNI_ENTRY(void, jni_GetStringRegion(JNIEnv *env, jstring string, jsize start, jsize len, jchar *buf))
2847 HOTSPOT_JNI_GETSTRINGREGION_ENTRY(env, string, start, len, buf);
2848 DT_VOID_RETURN_MARK(GetStringRegion);
2849 oop s = JNIHandles::resolve_non_null(string);
2850 typeArrayOop s_value = java_lang_String::value(s);
2851 int s_len = java_lang_String::length(s, s_value);
2852 if (start < 0 || len < 0 || start > s_len - len) {
2853 THROW(vmSymbols::java_lang_StringIndexOutOfBoundsException());
2854 } else {
2855 if (len > 0) {
2856 bool is_latin1 = java_lang_String::is_latin1(s);
2857 if (!is_latin1) {
2858 ArrayAccess<>::arraycopy_to_native(s_value, typeArrayOopDesc::element_offset<jchar>(start),
2859 buf, len);
2860 } else {
2861 for (int i = 0; i < len; i++) {
2862 buf[i] = ((jchar) s_value->byte_at(i + start)) & 0xff;
2863 }
2864 }
2865 }
2866 }
2867 JNI_END
2868
2869 DT_VOID_RETURN_MARK_DECL(GetStringUTFRegion
2870 , HOTSPOT_JNI_GETSTRINGUTFREGION_RETURN());
2871
2872 JNI_ENTRY(void, jni_GetStringUTFRegion(JNIEnv *env, jstring string, jsize start, jsize len, char *buf))
2873 HOTSPOT_JNI_GETSTRINGUTFREGION_ENTRY(env, string, start, len, buf);
2874 DT_VOID_RETURN_MARK(GetStringUTFRegion);
2875 oop s = JNIHandles::resolve_non_null(string);
2876 typeArrayOop s_value = java_lang_String::value(s);
2877 int s_len = java_lang_String::length(s, s_value);
2878 if (start < 0 || len < 0 || start > s_len - len) {
2879 THROW(vmSymbols::java_lang_StringIndexOutOfBoundsException());
2880 } else {
2881 //%note jni_7
2882 if (len > 0) {
2883 // Assume the buffer is large enough as the JNI spec. does not require user error checking
2884 java_lang_String::as_utf8_string(s, s_value, start, len, buf, INT_MAX);
2885 // as_utf8_string null-terminates the result string
2886 } else {
2887 // JDK null-terminates the buffer even in len is zero
2888 if (buf != nullptr) {
2889 buf[0] = 0;
2890 }
2891 }
2892 }
2893 JNI_END
2894
2895 JNI_ENTRY(void*, jni_GetPrimitiveArrayCritical(JNIEnv *env, jarray array, jboolean *isCopy))
2896 HOTSPOT_JNI_GETPRIMITIVEARRAYCRITICAL_ENTRY(env, array, (uintptr_t *) isCopy);
2897 Handle a(thread, JNIHandles::resolve_non_null(array));
2898 assert(a->is_typeArray(), "just checking");
2899
2900 // Pin object
2901 Universe::heap()->pin_object(thread, a());
2902
2903 BasicType type = TypeArrayKlass::cast(a->klass())->element_type();
2904 void* ret = arrayOop(a())->base(type);
2905 if (isCopy != nullptr) {
2906 *isCopy = JNI_FALSE;
2907 }
2908 HOTSPOT_JNI_GETPRIMITIVEARRAYCRITICAL_RETURN(ret);
2909 return ret;
2910 JNI_END
2911
2912
2913 JNI_ENTRY(void, jni_ReleasePrimitiveArrayCritical(JNIEnv *env, jarray array, void *carray, jint mode))
2914 HOTSPOT_JNI_RELEASEPRIMITIVEARRAYCRITICAL_ENTRY(env, array, carray, mode);
2915 // Unpin object
2916 Universe::heap()->unpin_object(thread, JNIHandles::resolve_non_null(array));
2917 HOTSPOT_JNI_RELEASEPRIMITIVEARRAYCRITICAL_RETURN();
2918 JNI_END
2919
2920
2921 JNI_ENTRY(const jchar*, jni_GetStringCritical(JNIEnv *env, jstring string, jboolean *isCopy))
2922 HOTSPOT_JNI_GETSTRINGCRITICAL_ENTRY(env, string, (uintptr_t *) isCopy);
2923 oop s = JNIHandles::resolve_non_null(string);
2924 jchar* ret;
2925 if (!java_lang_String::is_latin1(s)) {
2926 typeArrayHandle s_value(thread, java_lang_String::value(s));
2927
2928 // Pin value array
2929 Universe::heap()->pin_object(thread, s_value());
2930
2931 ret = (jchar*) s_value->base(T_CHAR);
2932 if (isCopy != nullptr) *isCopy = JNI_FALSE;
2933 } else {
2934 // Inflate latin1 encoded string to UTF16
2935 typeArrayOop s_value = java_lang_String::value(s);
2936 int s_len = java_lang_String::length(s, s_value);
2937 ret = NEW_C_HEAP_ARRAY_RETURN_NULL(jchar, s_len + 1, mtInternal); // add one for zero termination
2938 /* JNI Specification states return null on OOM */
2939 if (ret != nullptr) {
2940 for (int i = 0; i < s_len; i++) {
2941 ret[i] = ((jchar) s_value->byte_at(i)) & 0xff;
2942 }
2943 ret[s_len] = 0;
2944 }
2945 if (isCopy != nullptr) *isCopy = JNI_TRUE;
2946 }
2947 HOTSPOT_JNI_GETSTRINGCRITICAL_RETURN((uint16_t *) ret);
2948 return ret;
2949 JNI_END
2950
2951
2952 JNI_ENTRY(void, jni_ReleaseStringCritical(JNIEnv *env, jstring str, const jchar *chars))
2953 HOTSPOT_JNI_RELEASESTRINGCRITICAL_ENTRY(env, str, (uint16_t *) chars);
2954 oop s = JNIHandles::resolve_non_null(str);
2955 bool is_latin1 = java_lang_String::is_latin1(s);
2956
2957 if (is_latin1) {
2958 // For latin1 string, free jchar array allocated by earlier call to GetStringCritical.
2959 // This assumes that ReleaseStringCritical bookends GetStringCritical.
2960 FREE_C_HEAP_ARRAY(jchar, chars);
2961 } else {
2962 // StringDedup can have replaced the value array, so don't fetch the array from 's'.
2963 // Instead, we calculate the address based on the jchar array exposed with GetStringCritical.
2964 oop value = cast_to_oop((address)chars - arrayOopDesc::base_offset_in_bytes(T_CHAR));
2965
2966 // Unpin value array
2967 Universe::heap()->unpin_object(thread, value);
2968 }
2969 HOTSPOT_JNI_RELEASESTRINGCRITICAL_RETURN();
2970 JNI_END
2971
2972
2973 JNI_ENTRY(jweak, jni_NewWeakGlobalRef(JNIEnv *env, jobject ref))
2974 HOTSPOT_JNI_NEWWEAKGLOBALREF_ENTRY(env, ref);
2975 Handle ref_handle(thread, JNIHandles::resolve(ref));
2976 jweak ret = JNIHandles::make_weak_global(ref_handle, AllocFailStrategy::RETURN_NULL);
2977 if (ret == nullptr && ref_handle.not_null()) {
2978 THROW_OOP_(Universe::out_of_memory_error_c_heap(), nullptr);
2979 }
2980 HOTSPOT_JNI_NEWWEAKGLOBALREF_RETURN(ret);
2981 return ret;
2982 JNI_END
2983
2984 // Must be JNI_ENTRY (with HandleMark)
2985 JNI_ENTRY(void, jni_DeleteWeakGlobalRef(JNIEnv *env, jweak ref))
2986 HOTSPOT_JNI_DELETEWEAKGLOBALREF_ENTRY(env, ref);
2987 JNIHandles::destroy_weak_global(ref);
2988 HOTSPOT_JNI_DELETEWEAKGLOBALREF_RETURN();
2989 JNI_END
2990
2991
2992 JNI_ENTRY_NO_PRESERVE(jboolean, jni_ExceptionCheck(JNIEnv *env))
2993 HOTSPOT_JNI_EXCEPTIONCHECK_ENTRY(env);
2994 jni_check_async_exceptions(thread);
2995 jboolean ret = (thread->has_pending_exception()) ? JNI_TRUE : JNI_FALSE;
2996 HOTSPOT_JNI_EXCEPTIONCHECK_RETURN(ret);
2997 return ret;
2998 JNI_END
2999
3000
3001 // Initialization state for three routines below relating to
3002 // java.nio.DirectBuffers
3003 static int directBufferSupportInitializeStarted = 0;
3004 static volatile int directBufferSupportInitializeEnded = 0;
3005 static volatile int directBufferSupportInitializeFailed = 0;
3006 static jclass bufferClass = nullptr;
3007 static jclass directBufferClass = nullptr;
3008 static jclass directByteBufferClass = nullptr;
3009 static jmethodID directByteBufferConstructor = nullptr;
3010 static jfieldID directBufferAddressField = nullptr;
3011 static jfieldID bufferCapacityField = nullptr;
3012
3013 static jclass lookupOne(JNIEnv* env, const char* name, TRAPS) {
3014 Handle loader; // null (bootstrap) loader
3015 Handle protection_domain; // null protection domain
3016
3017 TempNewSymbol sym = SymbolTable::new_symbol(name);
3018 jclass result = find_class_from_class_loader(env, sym, true, loader, protection_domain, true, CHECK_NULL);
3019
3020 if (log_is_enabled(Debug, class, resolve) && result != nullptr) {
3021 trace_class_resolution(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(result)));
3022 }
3023 return result;
3024 }
3025
3026 // These lookups are done with the null (bootstrap) ClassLoader to
3027 // circumvent any security checks that would be done by jni_FindClass.
3028 JNI_ENTRY(bool, lookupDirectBufferClasses(JNIEnv* env))
3029 {
3030 if ((bufferClass = lookupOne(env, "java/nio/Buffer", thread)) == nullptr) { return false; }
3031 if ((directBufferClass = lookupOne(env, "sun/nio/ch/DirectBuffer", thread)) == nullptr) { return false; }
3032 if ((directByteBufferClass = lookupOne(env, "java/nio/DirectByteBuffer", thread)) == nullptr) { return false; }
3033 return true;
3034 }
3035 JNI_END
3036
3037
3038 static bool initializeDirectBufferSupport(JNIEnv* env, JavaThread* thread) {
3039 if (directBufferSupportInitializeFailed) {
3040 return false;
3041 }
3042
3043 if (Atomic::cmpxchg(&directBufferSupportInitializeStarted, 0, 1) == 0) {
3044 if (!lookupDirectBufferClasses(env)) {
3045 directBufferSupportInitializeFailed = 1;
3046 return false;
3047 }
3048
3049 // Make global references for these
3050 bufferClass = (jclass) env->NewGlobalRef(bufferClass);
3051 directBufferClass = (jclass) env->NewGlobalRef(directBufferClass);
3052 directByteBufferClass = (jclass) env->NewGlobalRef(directByteBufferClass);
3053
3054 // Global refs will be null if out-of-memory (no exception is pending)
3055 if (bufferClass == nullptr || directBufferClass == nullptr || directByteBufferClass == nullptr) {
3056 directBufferSupportInitializeFailed = 1;
3057 return false;
3058 }
3059
3060 // Get needed field and method IDs
3061 directByteBufferConstructor = env->GetMethodID(directByteBufferClass, "<init>", "(JJ)V");
3062 if (env->ExceptionCheck()) {
3063 env->ExceptionClear();
3064 directBufferSupportInitializeFailed = 1;
3065 return false;
3066 }
3067 directBufferAddressField = env->GetFieldID(bufferClass, "address", "J");
3068 if (env->ExceptionCheck()) {
3069 env->ExceptionClear();
3070 directBufferSupportInitializeFailed = 1;
3071 return false;
3072 }
3073 bufferCapacityField = env->GetFieldID(bufferClass, "capacity", "I");
3074 if (env->ExceptionCheck()) {
3075 env->ExceptionClear();
3076 directBufferSupportInitializeFailed = 1;
3077 return false;
3078 }
3079
3080 if ((directByteBufferConstructor == nullptr) ||
3081 (directBufferAddressField == nullptr) ||
3082 (bufferCapacityField == nullptr)) {
3083 directBufferSupportInitializeFailed = 1;
3084 return false;
3085 }
3086
3087 directBufferSupportInitializeEnded = 1;
3088 } else {
3089 while (!directBufferSupportInitializeEnded && !directBufferSupportInitializeFailed) {
3090 os::naked_yield();
3091 }
3092 }
3093
3094 return !directBufferSupportInitializeFailed;
3095 }
3096
3097 extern "C" jobject JNICALL jni_NewDirectByteBuffer(JNIEnv *env, void* address, jlong capacity)
3098 {
3099 // thread_from_jni_environment() will block if VM is gone.
3100 JavaThread* thread = JavaThread::thread_from_jni_environment(env);
3101
3102 HOTSPOT_JNI_NEWDIRECTBYTEBUFFER_ENTRY(env, address, capacity);
3103
3104 if (!directBufferSupportInitializeEnded) {
3105 if (!initializeDirectBufferSupport(env, thread)) {
3106 HOTSPOT_JNI_NEWDIRECTBYTEBUFFER_RETURN(nullptr);
3107 return nullptr;
3108 }
3109 }
3110
3111 // Being paranoid about accidental sign extension on address
3112 jlong addr = (jlong) ((uintptr_t) address);
3113 jobject ret = env->NewObject(directByteBufferClass, directByteBufferConstructor, addr, capacity);
3114 HOTSPOT_JNI_NEWDIRECTBYTEBUFFER_RETURN(ret);
3115 return ret;
3116 }
3117
3118 DT_RETURN_MARK_DECL(GetDirectBufferAddress, void*
3119 , HOTSPOT_JNI_GETDIRECTBUFFERADDRESS_RETURN((void*) _ret_ref));
3120
3121 extern "C" void* JNICALL jni_GetDirectBufferAddress(JNIEnv *env, jobject buf)
3122 {
3123 // thread_from_jni_environment() will block if VM is gone.
3124 JavaThread* thread = JavaThread::thread_from_jni_environment(env);
3125
3126 HOTSPOT_JNI_GETDIRECTBUFFERADDRESS_ENTRY(env, buf);
3127 void* ret = nullptr;
3128 DT_RETURN_MARK(GetDirectBufferAddress, void*, (const void*&)ret);
3129
3130 if (!directBufferSupportInitializeEnded) {
3131 if (!initializeDirectBufferSupport(env, thread)) {
3132 return 0;
3133 }
3134 }
3135
3136 if ((buf != nullptr) && (!env->IsInstanceOf(buf, directBufferClass))) {
3137 return 0;
3138 }
3139
3140 ret = (void*)(intptr_t)env->GetLongField(buf, directBufferAddressField);
3141 return ret;
3142 }
3143
3144 DT_RETURN_MARK_DECL(GetDirectBufferCapacity, jlong
3145 , HOTSPOT_JNI_GETDIRECTBUFFERCAPACITY_RETURN(_ret_ref));
3146
3147 extern "C" jlong JNICALL jni_GetDirectBufferCapacity(JNIEnv *env, jobject buf)
3148 {
3149 // thread_from_jni_environment() will block if VM is gone.
3150 JavaThread* thread = JavaThread::thread_from_jni_environment(env);
3151
3152 HOTSPOT_JNI_GETDIRECTBUFFERCAPACITY_ENTRY(env, buf);
3153 jlong ret = -1;
3154 DT_RETURN_MARK(GetDirectBufferCapacity, jlong, (const jlong&)ret);
3155
3156 if (!directBufferSupportInitializeEnded) {
3157 if (!initializeDirectBufferSupport(env, thread)) {
3158 ret = 0;
3159 return ret;
3160 }
3161 }
3162
3163 if (buf == nullptr) {
3164 return -1;
3165 }
3166
3167 if (!env->IsInstanceOf(buf, directBufferClass)) {
3168 return -1;
3169 }
3170
3171 // NOTE that capacity is currently an int in the implementation
3172 ret = env->GetIntField(buf, bufferCapacityField);
3173 return ret;
3174 }
3175
3176
3177 JNI_LEAF(jint, jni_GetVersion(JNIEnv *env))
3178 HOTSPOT_JNI_GETVERSION_ENTRY(env);
3179 HOTSPOT_JNI_GETVERSION_RETURN(CurrentVersion);
3180 return CurrentVersion;
3181 JNI_END
3182
3183 extern struct JavaVM_ main_vm;
3184
3185 JNI_LEAF(jint, jni_GetJavaVM(JNIEnv *env, JavaVM **vm))
3186 HOTSPOT_JNI_GETJAVAVM_ENTRY(env, (void **) vm);
3187 *vm = (JavaVM *)(&main_vm);
3188 HOTSPOT_JNI_GETJAVAVM_RETURN(JNI_OK);
3189 return JNI_OK;
3190 JNI_END
3191
3192
3193 JNI_ENTRY(jobject, jni_GetModule(JNIEnv* env, jclass clazz))
3194 return Modules::get_module(clazz, THREAD);
3195 JNI_END
3196
3197 JNI_ENTRY(jboolean, jni_IsVirtualThread(JNIEnv* env, jobject obj))
3198 oop thread_obj = JNIHandles::resolve_external_guard(obj);
3199 if (thread_obj != nullptr && thread_obj->is_a(vmClasses::BaseVirtualThread_klass())) {
3200 return JNI_TRUE;
3201 } else {
3202 return JNI_FALSE;
3203 }
3204 JNI_END
3205
3206
3207 // Structure containing all jni functions
3208 struct JNINativeInterface_ jni_NativeInterface = {
3209 nullptr,
3210 nullptr,
3211 nullptr,
3212
3213 nullptr,
3214
3215 jni_GetVersion,
3216
3217 jni_DefineClass,
3218 jni_FindClass,
3219
3220 jni_FromReflectedMethod,
3221 jni_FromReflectedField,
3222
3223 jni_ToReflectedMethod,
3224
3225 jni_GetSuperclass,
3226 jni_IsAssignableFrom,
3227
3228 jni_ToReflectedField,
3229
3230 jni_Throw,
3231 jni_ThrowNew,
3232 jni_ExceptionOccurred,
3233 jni_ExceptionDescribe,
3234 jni_ExceptionClear,
3235 jni_FatalError,
3236
3237 jni_PushLocalFrame,
3238 jni_PopLocalFrame,
3239
3240 jni_NewGlobalRef,
3241 jni_DeleteGlobalRef,
3242 jni_DeleteLocalRef,
3243 jni_IsSameObject,
3244
3245 jni_NewLocalRef,
3246 jni_EnsureLocalCapacity,
3247
3248 jni_AllocObject,
3249 jni_NewObject,
3250 jni_NewObjectV,
3251 jni_NewObjectA,
3252
3253 jni_GetObjectClass,
3254 jni_IsInstanceOf,
3255
3256 jni_GetMethodID,
3257
3258 jni_CallObjectMethod,
3259 jni_CallObjectMethodV,
3260 jni_CallObjectMethodA,
3261 jni_CallBooleanMethod,
3262 jni_CallBooleanMethodV,
3263 jni_CallBooleanMethodA,
3264 jni_CallByteMethod,
3265 jni_CallByteMethodV,
3266 jni_CallByteMethodA,
3267 jni_CallCharMethod,
3268 jni_CallCharMethodV,
3269 jni_CallCharMethodA,
3270 jni_CallShortMethod,
3271 jni_CallShortMethodV,
3272 jni_CallShortMethodA,
3273 jni_CallIntMethod,
3274 jni_CallIntMethodV,
3275 jni_CallIntMethodA,
3276 jni_CallLongMethod,
3277 jni_CallLongMethodV,
3278 jni_CallLongMethodA,
3279 jni_CallFloatMethod,
3280 jni_CallFloatMethodV,
3281 jni_CallFloatMethodA,
3282 jni_CallDoubleMethod,
3283 jni_CallDoubleMethodV,
3284 jni_CallDoubleMethodA,
3285 jni_CallVoidMethod,
3286 jni_CallVoidMethodV,
3287 jni_CallVoidMethodA,
3288
3289 jni_CallNonvirtualObjectMethod,
3290 jni_CallNonvirtualObjectMethodV,
3291 jni_CallNonvirtualObjectMethodA,
3292 jni_CallNonvirtualBooleanMethod,
3293 jni_CallNonvirtualBooleanMethodV,
3294 jni_CallNonvirtualBooleanMethodA,
3295 jni_CallNonvirtualByteMethod,
3296 jni_CallNonvirtualByteMethodV,
3297 jni_CallNonvirtualByteMethodA,
3298 jni_CallNonvirtualCharMethod,
3299 jni_CallNonvirtualCharMethodV,
3300 jni_CallNonvirtualCharMethodA,
3301 jni_CallNonvirtualShortMethod,
3302 jni_CallNonvirtualShortMethodV,
3303 jni_CallNonvirtualShortMethodA,
3304 jni_CallNonvirtualIntMethod,
3305 jni_CallNonvirtualIntMethodV,
3306 jni_CallNonvirtualIntMethodA,
3307 jni_CallNonvirtualLongMethod,
3308 jni_CallNonvirtualLongMethodV,
3309 jni_CallNonvirtualLongMethodA,
3310 jni_CallNonvirtualFloatMethod,
3311 jni_CallNonvirtualFloatMethodV,
3312 jni_CallNonvirtualFloatMethodA,
3313 jni_CallNonvirtualDoubleMethod,
3314 jni_CallNonvirtualDoubleMethodV,
3315 jni_CallNonvirtualDoubleMethodA,
3316 jni_CallNonvirtualVoidMethod,
3317 jni_CallNonvirtualVoidMethodV,
3318 jni_CallNonvirtualVoidMethodA,
3319
3320 jni_GetFieldID,
3321
3322 jni_GetObjectField,
3323 jni_GetBooleanField,
3324 jni_GetByteField,
3325 jni_GetCharField,
3326 jni_GetShortField,
3327 jni_GetIntField,
3328 jni_GetLongField,
3329 jni_GetFloatField,
3330 jni_GetDoubleField,
3331
3332 jni_SetObjectField,
3333 jni_SetBooleanField,
3334 jni_SetByteField,
3335 jni_SetCharField,
3336 jni_SetShortField,
3337 jni_SetIntField,
3338 jni_SetLongField,
3339 jni_SetFloatField,
3340 jni_SetDoubleField,
3341
3342 jni_GetStaticMethodID,
3343
3344 jni_CallStaticObjectMethod,
3345 jni_CallStaticObjectMethodV,
3346 jni_CallStaticObjectMethodA,
3347 jni_CallStaticBooleanMethod,
3348 jni_CallStaticBooleanMethodV,
3349 jni_CallStaticBooleanMethodA,
3350 jni_CallStaticByteMethod,
3351 jni_CallStaticByteMethodV,
3352 jni_CallStaticByteMethodA,
3353 jni_CallStaticCharMethod,
3354 jni_CallStaticCharMethodV,
3355 jni_CallStaticCharMethodA,
3356 jni_CallStaticShortMethod,
3357 jni_CallStaticShortMethodV,
3358 jni_CallStaticShortMethodA,
3359 jni_CallStaticIntMethod,
3360 jni_CallStaticIntMethodV,
3361 jni_CallStaticIntMethodA,
3362 jni_CallStaticLongMethod,
3363 jni_CallStaticLongMethodV,
3364 jni_CallStaticLongMethodA,
3365 jni_CallStaticFloatMethod,
3366 jni_CallStaticFloatMethodV,
3367 jni_CallStaticFloatMethodA,
3368 jni_CallStaticDoubleMethod,
3369 jni_CallStaticDoubleMethodV,
3370 jni_CallStaticDoubleMethodA,
3371 jni_CallStaticVoidMethod,
3372 jni_CallStaticVoidMethodV,
3373 jni_CallStaticVoidMethodA,
3374
3375 jni_GetStaticFieldID,
3376
3377 jni_GetStaticObjectField,
3378 jni_GetStaticBooleanField,
3379 jni_GetStaticByteField,
3380 jni_GetStaticCharField,
3381 jni_GetStaticShortField,
3382 jni_GetStaticIntField,
3383 jni_GetStaticLongField,
3384 jni_GetStaticFloatField,
3385 jni_GetStaticDoubleField,
3386
3387 jni_SetStaticObjectField,
3388 jni_SetStaticBooleanField,
3389 jni_SetStaticByteField,
3390 jni_SetStaticCharField,
3391 jni_SetStaticShortField,
3392 jni_SetStaticIntField,
3393 jni_SetStaticLongField,
3394 jni_SetStaticFloatField,
3395 jni_SetStaticDoubleField,
3396
3397 jni_NewString,
3398 jni_GetStringLength,
3399 jni_GetStringChars,
3400 jni_ReleaseStringChars,
3401
3402 jni_NewStringUTF,
3403 jni_GetStringUTFLength,
3404 jni_GetStringUTFChars,
3405 jni_ReleaseStringUTFChars,
3406
3407 jni_GetArrayLength,
3408
3409 jni_NewObjectArray,
3410 jni_GetObjectArrayElement,
3411 jni_SetObjectArrayElement,
3412
3413 jni_NewBooleanArray,
3414 jni_NewByteArray,
3415 jni_NewCharArray,
3416 jni_NewShortArray,
3417 jni_NewIntArray,
3418 jni_NewLongArray,
3419 jni_NewFloatArray,
3420 jni_NewDoubleArray,
3421
3422 jni_GetBooleanArrayElements,
3423 jni_GetByteArrayElements,
3424 jni_GetCharArrayElements,
3425 jni_GetShortArrayElements,
3426 jni_GetIntArrayElements,
3427 jni_GetLongArrayElements,
3428 jni_GetFloatArrayElements,
3429 jni_GetDoubleArrayElements,
3430
3431 jni_ReleaseBooleanArrayElements,
3432 jni_ReleaseByteArrayElements,
3433 jni_ReleaseCharArrayElements,
3434 jni_ReleaseShortArrayElements,
3435 jni_ReleaseIntArrayElements,
3436 jni_ReleaseLongArrayElements,
3437 jni_ReleaseFloatArrayElements,
3438 jni_ReleaseDoubleArrayElements,
3439
3440 jni_GetBooleanArrayRegion,
3441 jni_GetByteArrayRegion,
3442 jni_GetCharArrayRegion,
3443 jni_GetShortArrayRegion,
3444 jni_GetIntArrayRegion,
3445 jni_GetLongArrayRegion,
3446 jni_GetFloatArrayRegion,
3447 jni_GetDoubleArrayRegion,
3448
3449 jni_SetBooleanArrayRegion,
3450 jni_SetByteArrayRegion,
3451 jni_SetCharArrayRegion,
3452 jni_SetShortArrayRegion,
3453 jni_SetIntArrayRegion,
3454 jni_SetLongArrayRegion,
3455 jni_SetFloatArrayRegion,
3456 jni_SetDoubleArrayRegion,
3457
3458 jni_RegisterNatives,
3459 jni_UnregisterNatives,
3460
3461 jni_MonitorEnter,
3462 jni_MonitorExit,
3463
3464 jni_GetJavaVM,
3465
3466 jni_GetStringRegion,
3467 jni_GetStringUTFRegion,
3468
3469 jni_GetPrimitiveArrayCritical,
3470 jni_ReleasePrimitiveArrayCritical,
3471
3472 jni_GetStringCritical,
3473 jni_ReleaseStringCritical,
3474
3475 jni_NewWeakGlobalRef,
3476 jni_DeleteWeakGlobalRef,
3477
3478 jni_ExceptionCheck,
3479
3480 jni_NewDirectByteBuffer,
3481 jni_GetDirectBufferAddress,
3482 jni_GetDirectBufferCapacity,
3483
3484 // New 1_6 features
3485
3486 jni_GetObjectRefType,
3487
3488 // Module features
3489
3490 jni_GetModule,
3491
3492 // Virtual threads
3493
3494 jni_IsVirtualThread
3495 };
3496
3497
3498 // For jvmti use to modify jni function table.
3499 // Java threads in native contiues to run until it is transitioned
3500 // to VM at safepoint. Before the transition or before it is blocked
3501 // for safepoint it may access jni function table. VM could crash if
3502 // any java thread access the jni function table in the middle of memcpy.
3503 // To avoid this each function pointers are copied automically.
3504 void copy_jni_function_table(const struct JNINativeInterface_ *new_jni_NativeInterface) {
3505 assert(SafepointSynchronize::is_at_safepoint(), "must be at safepoint");
3506 intptr_t *a = (intptr_t *) jni_functions();
3507 intptr_t *b = (intptr_t *) new_jni_NativeInterface;
3508 for (uint i=0; i < sizeof(struct JNINativeInterface_)/sizeof(void *); i++) {
3509 Atomic::store(a++, *b++);
3510 }
3511 }
3512
3513 void quicken_jni_functions() {
3514 // Replace Get<Primitive>Field with fast versions
3515 if (UseFastJNIAccessors && !VerifyJNIFields && !CheckJNICalls) {
3516 address func;
3517 func = JNI_FastGetField::generate_fast_get_boolean_field();
3518 if (func != (address)-1) {
3519 jni_NativeInterface.GetBooleanField = (GetBooleanField_t)func;
3520 }
3521 func = JNI_FastGetField::generate_fast_get_byte_field();
3522 if (func != (address)-1) {
3523 jni_NativeInterface.GetByteField = (GetByteField_t)func;
3524 }
3525 func = JNI_FastGetField::generate_fast_get_char_field();
3526 if (func != (address)-1) {
3527 jni_NativeInterface.GetCharField = (GetCharField_t)func;
3528 }
3529 func = JNI_FastGetField::generate_fast_get_short_field();
3530 if (func != (address)-1) {
3531 jni_NativeInterface.GetShortField = (GetShortField_t)func;
3532 }
3533 func = JNI_FastGetField::generate_fast_get_int_field();
3534 if (func != (address)-1) {
3535 jni_NativeInterface.GetIntField = (GetIntField_t)func;
3536 }
3537 func = JNI_FastGetField::generate_fast_get_long_field();
3538 if (func != (address)-1) {
3539 jni_NativeInterface.GetLongField = (GetLongField_t)func;
3540 }
3541 func = JNI_FastGetField::generate_fast_get_float_field();
3542 if (func != (address)-1) {
3543 jni_NativeInterface.GetFloatField = (GetFloatField_t)func;
3544 }
3545 func = JNI_FastGetField::generate_fast_get_double_field();
3546 if (func != (address)-1) {
3547 jni_NativeInterface.GetDoubleField = (GetDoubleField_t)func;
3548 }
3549 }
3550 }
3551
3552 // Returns the function structure
3553 struct JNINativeInterface_* jni_functions() {
3554 #if INCLUDE_JNI_CHECK
3555 if (CheckJNICalls) return jni_functions_check();
3556 #endif // INCLUDE_JNI_CHECK
3557 return &jni_NativeInterface;
3558 }
3559
3560 // Returns the function structure
3561 struct JNINativeInterface_* jni_functions_nocheck() {
3562 return &jni_NativeInterface;
3563 }
3564
3565
3566 // Invocation API
3567
3568
3569 // Forward declaration
3570 extern const struct JNIInvokeInterface_ jni_InvokeInterface;
3571
3572 // Global invocation API vars
3573 enum VM_Creation_State {
3574 NOT_CREATED = 0,
3575 IN_PROGRESS, // Most JNI operations are permitted during this phase to
3576 // allow for initialization actions by libraries and agents.
3577 COMPLETE
3578 };
3579
3580 volatile VM_Creation_State vm_created = NOT_CREATED;
3581
3582 // Indicate whether it is safe to recreate VM. Recreation is only
3583 // possible after a failed initial creation attempt in some cases.
3584 volatile int safe_to_recreate_vm = 1;
3585 struct JavaVM_ main_vm = {&jni_InvokeInterface};
3586
3587
3588 #define JAVASTACKSIZE (400 * 1024) /* Default size of a thread java stack */
3589 enum { VERIFY_NONE, VERIFY_REMOTE, VERIFY_ALL };
3590
3591 DT_RETURN_MARK_DECL(GetDefaultJavaVMInitArgs, jint
3592 , HOTSPOT_JNI_GETDEFAULTJAVAVMINITARGS_RETURN(_ret_ref));
3593
3594 _JNI_IMPORT_OR_EXPORT_ jint JNICALL JNI_GetDefaultJavaVMInitArgs(void *args_) {
3595 HOTSPOT_JNI_GETDEFAULTJAVAVMINITARGS_ENTRY(args_);
3596 JDK1_1InitArgs *args = (JDK1_1InitArgs *)args_;
3597 jint ret = JNI_ERR;
3598 DT_RETURN_MARK(GetDefaultJavaVMInitArgs, jint, (const jint&)ret);
3599
3600 if (Threads::is_supported_jni_version(args->version)) {
3601 ret = JNI_OK;
3602 }
3603 // 1.1 style no longer supported in hotspot.
3604 // According the JNI spec, we should update args->version on return.
3605 // We also use the structure to communicate with launcher about default
3606 // stack size.
3607 if (args->version == JNI_VERSION_1_1) {
3608 args->version = JNI_VERSION_1_2;
3609 // javaStackSize is int in arguments structure
3610 assert(jlong(ThreadStackSize) * K < INT_MAX, "integer overflow");
3611 args->javaStackSize = (jint)(ThreadStackSize * K);
3612 }
3613 return ret;
3614 }
3615
3616 DT_RETURN_MARK_DECL(CreateJavaVM, jint
3617 , HOTSPOT_JNI_CREATEJAVAVM_RETURN(_ret_ref));
3618
3619 static jint JNI_CreateJavaVM_inner(JavaVM **vm, void **penv, void *args) {
3620 HOTSPOT_JNI_CREATEJAVAVM_ENTRY((void **) vm, penv, args);
3621
3622 jint result = JNI_ERR;
3623 DT_RETURN_MARK(CreateJavaVM, jint, (const jint&)result);
3624
3625 // We're about to use Atomic::xchg for synchronization. Some Zero
3626 // platforms use the GCC builtin __sync_lock_test_and_set for this,
3627 // but __sync_lock_test_and_set is not guaranteed to do what we want
3628 // on all architectures. So we check it works before relying on it.
3629 #if defined(ZERO) && defined(ASSERT)
3630 {
3631 jint a = 0xcafebabe;
3632 jint b = Atomic::xchg(&a, (jint) 0xdeadbeef);
3633 void *c = &a;
3634 void *d = Atomic::xchg(&c, &b);
3635 assert(a == (jint) 0xdeadbeef && b == (jint) 0xcafebabe, "Atomic::xchg() works");
3636 assert(c == &b && d == &a, "Atomic::xchg() works");
3637 }
3638 #endif // ZERO && ASSERT
3639
3640 // At the moment it's only possible to have one Java VM,
3641 // since some of the runtime state is in global variables.
3642
3643 // We cannot use our mutex locks here, since they only work on
3644 // Threads. We do an atomic compare and exchange to ensure only
3645 // one thread can call this method at a time
3646
3647 // We use Atomic::xchg rather than Atomic::add/dec since on some platforms
3648 // the add/dec implementations are dependent on whether we are running
3649 // on a multiprocessor Atomic::xchg does not have this problem.
3650 if (Atomic::xchg(&vm_created, IN_PROGRESS) != NOT_CREATED) {
3651 return JNI_EEXIST; // already created, or create attempt in progress
3652 }
3653
3654 // If a previous creation attempt failed but can be retried safely,
3655 // then safe_to_recreate_vm will have been reset to 1 after being
3656 // cleared here. If a previous creation attempt succeeded and we then
3657 // destroyed that VM, we will be prevented from trying to recreate
3658 // the VM in the same process, as the value will still be 0.
3659 if (Atomic::xchg(&safe_to_recreate_vm, 0) == 0) {
3660 return JNI_ERR;
3661 }
3662
3663 /**
3664 * Certain errors during initialization are recoverable and do not
3665 * prevent this method from being called again at a later time
3666 * (perhaps with different arguments). However, at a certain
3667 * point during initialization if an error occurs we cannot allow
3668 * this function to be called again (or it will crash). In those
3669 * situations, the 'canTryAgain' flag is set to false, which atomically
3670 * sets safe_to_recreate_vm to 1, such that any new call to
3671 * JNI_CreateJavaVM will immediately fail using the above logic.
3672 */
3673 bool can_try_again = true;
3674
3675 result = Threads::create_vm((JavaVMInitArgs*) args, &can_try_again);
3676 if (result == JNI_OK) {
3677 JavaThread *thread = JavaThread::current();
3678 assert(!thread->has_pending_exception(), "should have returned not OK");
3679 // thread is thread_in_vm here
3680 *vm = (JavaVM *)(&main_vm);
3681 *(JNIEnv**)penv = thread->jni_environment();
3682 // mark creation complete for other JNI ops
3683 Atomic::release_store(&vm_created, COMPLETE);
3684
3685 #if INCLUDE_JVMCI
3686 if (EnableJVMCI) {
3687 if (UseJVMCICompiler) {
3688 // JVMCI is initialized on a CompilerThread
3689 if (BootstrapJVMCI) {
3690 JavaThread* THREAD = thread; // For exception macros.
3691 JVMCICompiler* compiler = JVMCICompiler::instance(true, CATCH);
3692 compiler->bootstrap(THREAD);
3693 if (HAS_PENDING_EXCEPTION) {
3694 HandleMark hm(THREAD);
3695 vm_exit_during_initialization(Handle(THREAD, PENDING_EXCEPTION));
3696 }
3697 }
3698 }
3699 }
3700 #endif
3701
3702 // Notify JVMTI
3703 if (JvmtiExport::should_post_thread_life()) {
3704 JvmtiExport::post_thread_start(thread);
3705 }
3706
3707 JFR_ONLY(Jfr::on_thread_start(thread);)
3708
3709 if (ReplayCompiles) ciReplay::replay(thread);
3710
3711 #ifdef ASSERT
3712 // Some platforms (like Win*) need a wrapper around these test
3713 // functions in order to properly handle error conditions.
3714 if (ErrorHandlerTest != 0) {
3715 VMError::controlled_crash(ErrorHandlerTest);
3716 }
3717 #endif
3718
3719 // Since this is not a JVM_ENTRY we have to set the thread state manually before leaving.
3720 ThreadStateTransition::transition_from_vm(thread, _thread_in_native);
3721 MACOS_AARCH64_ONLY(thread->enable_wx(WXExec));
3722 } else {
3723 // If create_vm exits because of a pending exception, exit with that
3724 // exception. In the future when we figure out how to reclaim memory,
3725 // we may be able to exit with JNI_ERR and allow the calling application
3726 // to continue.
3727 if (Universe::is_fully_initialized()) {
3728 // otherwise no pending exception possible - VM will already have aborted
3729 Thread* current = Thread::current_or_null();
3730 if (current != nullptr) {
3731 JavaThread* THREAD = JavaThread::cast(current); // For exception macros.
3732 assert(HAS_PENDING_EXCEPTION, "must be - else no current thread exists");
3733 HandleMark hm(THREAD);
3734 vm_exit_during_initialization(Handle(THREAD, PENDING_EXCEPTION));
3735 }
3736 }
3737
3738 if (can_try_again) {
3739 // reset safe_to_recreate_vm to 1 so that retrial would be possible
3740 safe_to_recreate_vm = 1;
3741 }
3742
3743 // Creation failed. We must reset vm_created
3744 *vm = 0;
3745 *(JNIEnv**)penv = 0;
3746 // reset vm_created last to avoid race condition. Use OrderAccess to
3747 // control both compiler and architectural-based reordering.
3748 assert(vm_created == IN_PROGRESS, "must be");
3749 Atomic::release_store(&vm_created, NOT_CREATED);
3750 }
3751
3752 // Flush stdout and stderr before exit.
3753 fflush(stdout);
3754 fflush(stderr);
3755
3756 return result;
3757
3758 }
3759
3760 _JNI_IMPORT_OR_EXPORT_ jint JNICALL JNI_CreateJavaVM(JavaVM **vm, void **penv, void *args) {
3761 jint result = JNI_ERR;
3762 // On Windows, let CreateJavaVM run with SEH protection
3763 #if defined(_WIN32) && !defined(USE_VECTORED_EXCEPTION_HANDLING)
3764 __try {
3765 #endif
3766 result = JNI_CreateJavaVM_inner(vm, penv, args);
3767 #if defined(_WIN32) && !defined(USE_VECTORED_EXCEPTION_HANDLING)
3768 } __except(topLevelExceptionFilter((_EXCEPTION_POINTERS*)_exception_info())) {
3769 // Nothing to do.
3770 }
3771 #endif
3772 return result;
3773 }
3774
3775 _JNI_IMPORT_OR_EXPORT_ jint JNICALL JNI_GetCreatedJavaVMs(JavaVM **vm_buf, jsize bufLen, jsize *numVMs) {
3776 HOTSPOT_JNI_GETCREATEDJAVAVMS_ENTRY((void **) vm_buf, bufLen, (uintptr_t *) numVMs);
3777
3778 if (vm_created == COMPLETE) {
3779 if (numVMs != nullptr) *numVMs = 1;
3780 if (bufLen > 0) *vm_buf = (JavaVM *)(&main_vm);
3781 } else {
3782 if (numVMs != nullptr) *numVMs = 0;
3783 }
3784 HOTSPOT_JNI_GETCREATEDJAVAVMS_RETURN(JNI_OK);
3785 return JNI_OK;
3786 }
3787
3788 extern "C" {
3789
3790 DT_RETURN_MARK_DECL(DestroyJavaVM, jint
3791 , HOTSPOT_JNI_DESTROYJAVAVM_RETURN(_ret_ref));
3792
3793 static jint JNICALL jni_DestroyJavaVM_inner(JavaVM *vm) {
3794 HOTSPOT_JNI_DESTROYJAVAVM_ENTRY(vm);
3795 jint res = JNI_ERR;
3796 DT_RETURN_MARK(DestroyJavaVM, jint, (const jint&)res);
3797
3798 if (vm_created == NOT_CREATED) {
3799 res = JNI_ERR;
3800 return res;
3801 }
3802
3803 JNIEnv *env;
3804 JavaVMAttachArgs destroyargs;
3805 destroyargs.version = CurrentVersion;
3806 destroyargs.name = (char *)"DestroyJavaVM";
3807 destroyargs.group = nullptr;
3808 res = vm->AttachCurrentThread((void **)&env, (void *)&destroyargs);
3809 if (res != JNI_OK) {
3810 return res;
3811 }
3812
3813 JavaThread* thread = JavaThread::current();
3814
3815 // Make sure we are actually in a newly attached thread, with no
3816 // existing Java frame.
3817 if (thread->has_last_Java_frame()) {
3818 return JNI_ERR;
3819 }
3820
3821 // Since this is not a JVM_ENTRY we have to set the thread state manually before entering.
3822
3823 // We are going to VM, change W^X state to the expected one.
3824 MACOS_AARCH64_ONLY(WXMode oldmode = thread->enable_wx(WXWrite));
3825
3826 ThreadStateTransition::transition_from_native(thread, _thread_in_vm);
3827 Threads::destroy_vm();
3828 // Don't bother restoring thread state, VM is gone.
3829 vm_created = NOT_CREATED;
3830 return JNI_OK;
3831 }
3832
3833 jint JNICALL jni_DestroyJavaVM(JavaVM *vm) {
3834 jint result = JNI_ERR;
3835 // On Windows, we need SEH protection
3836 #if defined(_WIN32) && !defined(USE_VECTORED_EXCEPTION_HANDLING)
3837 __try {
3838 #endif
3839 result = jni_DestroyJavaVM_inner(vm);
3840 #if defined(_WIN32) && !defined(USE_VECTORED_EXCEPTION_HANDLING)
3841 } __except(topLevelExceptionFilter((_EXCEPTION_POINTERS*)_exception_info())) {
3842 // Nothing to do.
3843 }
3844 #endif
3845 return result;
3846 }
3847
3848 static jint attach_current_thread(JavaVM *vm, void **penv, void *_args, bool daemon) {
3849 JavaVMAttachArgs *args = (JavaVMAttachArgs *) _args;
3850
3851 // Check below commented out from JDK1.2fcs as well
3852 /*
3853 if (args && (args->version != JNI_VERSION_1_1 || args->version != JNI_VERSION_1_2)) {
3854 return JNI_EVERSION;
3855 }
3856 */
3857
3858 Thread* t = Thread::current_or_null();
3859 if (t != nullptr) {
3860 // If executing from an atexit hook we may be in the VMThread.
3861 if (t->is_Java_thread()) {
3862 // If the thread has been attached this operation is a no-op
3863 *(JNIEnv**)penv = JavaThread::cast(t)->jni_environment();
3864 return JNI_OK;
3865 } else {
3866 return JNI_ERR;
3867 }
3868 }
3869
3870 // Create a thread and mark it as attaching so it will be skipped by the
3871 // ThreadsListEnumerator - see CR 6404306
3872 JavaThread* thread = new JavaThread(true);
3873
3874 // Set correct safepoint info. The thread is going to call into Java when
3875 // initializing the Java level thread object. Hence, the correct state must
3876 // be set in order for the Safepoint code to deal with it correctly.
3877 thread->set_thread_state(_thread_in_vm);
3878 thread->record_stack_base_and_size();
3879 thread->register_thread_stack_with_NMT();
3880 thread->initialize_thread_current();
3881 MACOS_AARCH64_ONLY(thread->init_wx());
3882
3883 if (!os::create_attached_thread(thread)) {
3884 thread->smr_delete();
3885 return JNI_ERR;
3886 }
3887 // Enable stack overflow checks
3888 thread->stack_overflow_state()->create_stack_guard_pages();
3889
3890 thread->initialize_tlab();
3891
3892 thread->cache_global_variables();
3893
3894 // This thread will not do a safepoint check, since it has
3895 // not been added to the Thread list yet.
3896 { MutexLocker ml(Threads_lock);
3897 // This must be inside this lock in order to get FullGCALot to work properly, i.e., to
3898 // avoid this thread trying to do a GC before it is added to the thread-list
3899 thread->set_active_handles(JNIHandleBlock::allocate_block());
3900 Threads::add(thread, daemon);
3901 }
3902 // Create thread group and name info from attach arguments
3903 oop group = nullptr;
3904 char* thread_name = nullptr;
3905 if (args != nullptr && Threads::is_supported_jni_version(args->version)) {
3906 group = JNIHandles::resolve(args->group);
3907 thread_name = args->name; // may be null
3908 }
3909 if (group == nullptr) group = Universe::main_thread_group();
3910
3911 // Create Java level thread object and attach it to this thread
3912 bool attach_failed = false;
3913 {
3914 EXCEPTION_MARK;
3915 HandleMark hm(THREAD);
3916 Handle thread_group(THREAD, group);
3917 thread->allocate_threadObj(thread_group, thread_name, daemon, THREAD);
3918 if (HAS_PENDING_EXCEPTION) {
3919 CLEAR_PENDING_EXCEPTION;
3920 // cleanup outside the handle mark.
3921 attach_failed = true;
3922 }
3923 }
3924
3925 if (attach_failed) {
3926 // Added missing cleanup
3927 thread->cleanup_failed_attach_current_thread(daemon);
3928 return JNI_ERR;
3929 }
3930
3931 // mark the thread as no longer attaching
3932 // this uses a fence to push the change through so we don't have
3933 // to regrab the threads_lock
3934 thread->set_done_attaching_via_jni();
3935
3936 // Set java thread status.
3937 java_lang_Thread::set_thread_status(thread->threadObj(),
3938 JavaThreadStatus::RUNNABLE);
3939
3940 // Notify the debugger
3941 if (JvmtiExport::should_post_thread_life()) {
3942 JvmtiExport::post_thread_start(thread);
3943 }
3944
3945 JFR_ONLY(Jfr::on_thread_start(thread);)
3946
3947 *(JNIEnv**)penv = thread->jni_environment();
3948
3949 // Now leaving the VM, so change thread_state. This is normally automatically taken care
3950 // of in the JVM_ENTRY. But in this situation we have to do it manually.
3951 ThreadStateTransition::transition_from_vm(thread, _thread_in_native);
3952 MACOS_AARCH64_ONLY(thread->enable_wx(WXExec));
3953
3954 // Perform any platform dependent FPU setup
3955 os::setup_fpu();
3956
3957 return JNI_OK;
3958 }
3959
3960
3961 jint JNICALL jni_AttachCurrentThread(JavaVM *vm, void **penv, void *_args) {
3962 HOTSPOT_JNI_ATTACHCURRENTTHREAD_ENTRY(vm, penv, _args);
3963 if (vm_created == NOT_CREATED) {
3964 // Not sure how we could possibly get here.
3965 HOTSPOT_JNI_ATTACHCURRENTTHREAD_RETURN((uint32_t) JNI_ERR);
3966 return JNI_ERR;
3967 }
3968
3969 jint ret = attach_current_thread(vm, penv, _args, false);
3970 HOTSPOT_JNI_ATTACHCURRENTTHREAD_RETURN(ret);
3971 return ret;
3972 }
3973
3974
3975 jint JNICALL jni_DetachCurrentThread(JavaVM *vm) {
3976 HOTSPOT_JNI_DETACHCURRENTTHREAD_ENTRY(vm);
3977 if (vm_created == NOT_CREATED) {
3978 // Not sure how we could possibly get here.
3979 HOTSPOT_JNI_DETACHCURRENTTHREAD_RETURN(JNI_ERR);
3980 return JNI_ERR;
3981 }
3982
3983 Thread* current = Thread::current_or_null();
3984
3985 // If the thread has already been detached the operation is a no-op
3986 if (current == nullptr) {
3987 HOTSPOT_JNI_DETACHCURRENTTHREAD_RETURN(JNI_OK);
3988 return JNI_OK;
3989 }
3990
3991 // If executing from an atexit hook we may be in the VMThread.
3992 if (!current->is_Java_thread()) {
3993 HOTSPOT_JNI_DETACHCURRENTTHREAD_RETURN((uint32_t) JNI_ERR);
3994 return JNI_ERR;
3995 }
3996
3997 VM_Exit::block_if_vm_exited();
3998
3999 JavaThread* thread = JavaThread::cast(current);
4000 if (thread->has_last_Java_frame()) {
4001 HOTSPOT_JNI_DETACHCURRENTTHREAD_RETURN((uint32_t) JNI_ERR);
4002 // Can't detach a thread that's running java, that can't work.
4003 return JNI_ERR;
4004 }
4005
4006 // We are going to VM, change W^X state to the expected one.
4007 MACOS_AARCH64_ONLY(thread->enable_wx(WXWrite));
4008
4009 // Safepoint support. Have to do call-back to safepoint code, if in the
4010 // middle of a safepoint operation
4011 ThreadStateTransition::transition_from_native(thread, _thread_in_vm);
4012
4013 // XXX: Note that JavaThread::exit() call below removes the guards on the
4014 // stack pages set up via enable_stack_{red,yellow}_zone() calls
4015 // above in jni_AttachCurrentThread. Unfortunately, while the setting
4016 // of the guards is visible in jni_AttachCurrentThread above,
4017 // the removal of the guards is buried below in JavaThread::exit()
4018 // here. The abstraction should be more symmetrically either exposed
4019 // or hidden (e.g. it could probably be hidden in the same
4020 // (platform-dependent) methods where we do alternate stack
4021 // maintenance work?)
4022 thread->exit(false, JavaThread::jni_detach);
4023 thread->smr_delete();
4024
4025 // Go to the execute mode, the initial state of the thread on creation.
4026 // Use os interface as the thread is not a JavaThread anymore.
4027 MACOS_AARCH64_ONLY(os::current_thread_enable_wx(WXExec));
4028
4029 HOTSPOT_JNI_DETACHCURRENTTHREAD_RETURN(JNI_OK);
4030 return JNI_OK;
4031 }
4032
4033 DT_RETURN_MARK_DECL(GetEnv, jint
4034 , HOTSPOT_JNI_GETENV_RETURN(_ret_ref));
4035
4036 jint JNICALL jni_GetEnv(JavaVM *vm, void **penv, jint version) {
4037 HOTSPOT_JNI_GETENV_ENTRY(vm, penv, version);
4038 jint ret = JNI_ERR;
4039 DT_RETURN_MARK(GetEnv, jint, (const jint&)ret);
4040
4041 if (vm_created == NOT_CREATED) {
4042 *penv = nullptr;
4043 ret = JNI_EDETACHED;
4044 return ret;
4045 }
4046
4047 if (JniExportedInterface::GetExportedInterface(vm, penv, version, &ret)) {
4048 return ret;
4049 }
4050
4051 #ifndef JVMPI_VERSION_1
4052 // need these in order to be polite about older agents
4053 #define JVMPI_VERSION_1 ((jint)0x10000001)
4054 #define JVMPI_VERSION_1_1 ((jint)0x10000002)
4055 #define JVMPI_VERSION_1_2 ((jint)0x10000003)
4056 #endif // !JVMPI_VERSION_1
4057
4058 Thread* thread = Thread::current_or_null();
4059 if (thread != nullptr && thread->is_Java_thread()) {
4060 if (Threads::is_supported_jni_version_including_1_1(version)) {
4061 *(JNIEnv**)penv = JavaThread::cast(thread)->jni_environment();
4062 ret = JNI_OK;
4063 return ret;
4064
4065 } else if (version == JVMPI_VERSION_1 ||
4066 version == JVMPI_VERSION_1_1 ||
4067 version == JVMPI_VERSION_1_2) {
4068 tty->print_cr("ERROR: JVMPI, an experimental interface, is no longer supported.");
4069 tty->print_cr("Please use the supported interface: the JVM Tool Interface (JVM TI).");
4070 ret = JNI_EVERSION;
4071 return ret;
4072 } else if (JvmtiExport::is_jvmdi_version(version)) {
4073 tty->print_cr("FATAL ERROR: JVMDI is no longer supported.");
4074 tty->print_cr("Please use the supported interface: the JVM Tool Interface (JVM TI).");
4075 ret = JNI_EVERSION;
4076 return ret;
4077 } else {
4078 *penv = nullptr;
4079 ret = JNI_EVERSION;
4080 return ret;
4081 }
4082 } else {
4083 *penv = nullptr;
4084 ret = JNI_EDETACHED;
4085 return ret;
4086 }
4087 }
4088
4089
4090 jint JNICALL jni_AttachCurrentThreadAsDaemon(JavaVM *vm, void **penv, void *_args) {
4091 HOTSPOT_JNI_ATTACHCURRENTTHREADASDAEMON_ENTRY(vm, penv, _args);
4092 if (vm_created == NOT_CREATED) {
4093 // Not sure how we could possibly get here.
4094 HOTSPOT_JNI_ATTACHCURRENTTHREADASDAEMON_RETURN((uint32_t) JNI_ERR);
4095 return JNI_ERR;
4096 }
4097
4098 jint ret = attach_current_thread(vm, penv, _args, true);
4099 HOTSPOT_JNI_ATTACHCURRENTTHREADASDAEMON_RETURN(ret);
4100 return ret;
4101 }
4102
4103
4104 } // End extern "C"
4105
4106 const struct JNIInvokeInterface_ jni_InvokeInterface = {
4107 nullptr,
4108 nullptr,
4109 nullptr,
4110
4111 jni_DestroyJavaVM,
4112 jni_AttachCurrentThread,
4113 jni_DetachCurrentThread,
4114 jni_GetEnv,
4115 jni_AttachCurrentThreadAsDaemon
4116 };