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