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