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