1 /*
2 * Copyright (c) 1997, 2025, Oracle and/or its affiliates. All rights reserved.
3 * Copyright (c) 2012, 2024 Red Hat, Inc.
4 * Copyright (c) 2021, Azul Systems, Inc. All rights reserved.
5 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
6 *
7 * This code is free software; you can redistribute it and/or modify it
8 * under the terms of the GNU General Public License version 2 only, as
9 * published by the Free Software Foundation.
10 *
11 * This code is distributed in the hope that it will be useful, but WITHOUT
12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
14 * version 2 for more details (a copy is included in the LICENSE file that
15 * accompanied this code).
16 *
17 * You should have received a copy of the GNU General Public License version
18 * 2 along with this work; if not, write to the Free Software Foundation,
19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20 *
21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
22 * or visit www.oracle.com if you need additional information or have any
23 * questions.
24 *
25 */
26
27 #include "ci/ciReplay.hpp"
28 #include "classfile/altHashing.hpp"
29 #include "classfile/classFileStream.hpp"
30 #include "classfile/classLoader.hpp"
31 #include "classfile/classLoadInfo.hpp"
32 #include "classfile/javaClasses.hpp"
33 #include "classfile/javaClasses.inline.hpp"
34 #include "classfile/javaThreadStatus.hpp"
35 #include "classfile/moduleEntry.hpp"
36 #include "classfile/modules.hpp"
37 #include "classfile/symbolTable.hpp"
38 #include "classfile/systemDictionary.hpp"
39 #include "classfile/vmClasses.hpp"
40 #include "classfile/vmSymbols.hpp"
41 #include "compiler/compiler_globals.hpp"
42 #include "gc/shared/collectedHeap.hpp"
43 #include "gc/shared/stringdedup/stringDedup.hpp"
44 #include "interpreter/linkResolver.hpp"
45 #include "jni.h"
46 #include "jvm.h"
47 #include "logging/log.hpp"
48 #include "memory/allocation.hpp"
49 #include "memory/allocation.inline.hpp"
50 #include "memory/oopFactory.hpp"
51 #include "memory/resourceArea.hpp"
52 #include "memory/universe.hpp"
53 #include "nmt/memTracker.hpp"
54 #include "oops/access.inline.hpp"
55 #include "oops/arrayOop.hpp"
56 #include "oops/flatArrayOop.inline.hpp"
57 #include "oops/inlineKlass.inline.hpp"
58 #include "oops/instanceKlass.inline.hpp"
59 #include "oops/instanceOop.hpp"
60 #include "oops/klass.inline.hpp"
61 #include "oops/markWord.hpp"
62 #include "oops/method.hpp"
63 #include "oops/objArrayKlass.hpp"
64 #include "oops/objArrayOop.inline.hpp"
65 #include "oops/oop.inline.hpp"
66 #include "oops/symbol.hpp"
67 #include "oops/typeArrayKlass.hpp"
68 #include "oops/typeArrayOop.inline.hpp"
69 #include "prims/jniCheck.hpp"
70 #include "prims/jniExport.hpp"
71 #include "prims/jniFastGetField.hpp"
72 #include "prims/jvm_misc.hpp"
73 #include "prims/jvmtiExport.hpp"
74 #include "prims/jvmtiThreadState.hpp"
75 #include "runtime/arguments.hpp"
76 #include "runtime/atomic.hpp"
77 #include "runtime/fieldDescriptor.inline.hpp"
78 #include "runtime/handles.inline.hpp"
79 #include "runtime/interfaceSupport.inline.hpp"
80 #include "runtime/java.hpp"
81 #include "runtime/javaCalls.hpp"
82 #include "runtime/javaThread.inline.hpp"
83 #include "runtime/jfieldIDWorkaround.hpp"
84 #include "runtime/jniHandles.inline.hpp"
85 #include "runtime/reflection.hpp"
86 #include "runtime/safepointVerifiers.hpp"
87 #include "runtime/sharedRuntime.hpp"
88 #include "runtime/signature.hpp"
89 #include "runtime/synchronizer.hpp"
90 #include "runtime/thread.inline.hpp"
91 #include "runtime/vmOperations.hpp"
92 #include "services/runtimeService.hpp"
93 #include "utilities/defaultStream.hpp"
94 #include "utilities/dtrace.hpp"
95 #include "utilities/events.hpp"
96 #include "utilities/macros.hpp"
97 #include "utilities/vmError.hpp"
98 #if INCLUDE_JVMCI
99 #include "jvmci/jvmciCompiler.hpp"
100 #endif
101 #if INCLUDE_JFR
102 #include "jfr/jfr.hpp"
103 #endif
104
105 static jint CurrentVersion = JNI_VERSION_24;
106
107 #if defined(_WIN32) && !defined(USE_VECTORED_EXCEPTION_HANDLING)
108 extern LONG WINAPI topLevelExceptionFilter(_EXCEPTION_POINTERS* );
109 #endif
110
111 // The DT_RETURN_MARK macros create a scoped object to fire the dtrace
112 // '-return' probe regardless of the return path is taken out of the function.
113 // Methods that have multiple return paths use this to avoid having to
114 // instrument each return path. Methods that use CHECK or THROW must use this
115 // since those macros can cause an immediate uninstrumented return.
116 //
117 // In order to get the return value, a reference to the variable containing
118 // the return value must be passed to the constructor of the object, and
119 // the return value must be set before return (since the mark object has
120 // a reference to it).
121 //
122 // Example:
123 // DT_RETURN_MARK_DECL(SomeFunc, int);
124 // JNI_ENTRY(int, SomeFunc, ...)
125 // int return_value = 0;
126 // DT_RETURN_MARK(SomeFunc, int, (const int&)return_value);
127 // foo(CHECK_0)
128 // return_value = 5;
129 // return return_value;
130 // JNI_END
131 #define DT_RETURN_MARK_DECL(name, type, probe) \
132 DTRACE_ONLY( \
133 class DTraceReturnProbeMark_##name { \
134 public: \
135 const type& _ret_ref; \
136 DTraceReturnProbeMark_##name(const type& v) : _ret_ref(v) {} \
137 ~DTraceReturnProbeMark_##name() { \
138 probe; \
139 } \
140 } \
141 )
142 // Void functions are simpler since there's no return value
143 #define DT_VOID_RETURN_MARK_DECL(name, probe) \
144 DTRACE_ONLY( \
145 class DTraceReturnProbeMark_##name { \
146 public: \
147 ~DTraceReturnProbeMark_##name() { \
148 probe; \
149 } \
150 } \
151 )
152
153 // Place these macros in the function to mark the return. Non-void
154 // functions need the type and address of the return value.
155 #define DT_RETURN_MARK(name, type, ref) \
156 DTRACE_ONLY( DTraceReturnProbeMark_##name dtrace_return_mark(ref) )
157 #define DT_VOID_RETURN_MARK(name) \
158 DTRACE_ONLY( DTraceReturnProbeMark_##name dtrace_return_mark )
159
160
161 // Use these to select distinct code for floating-point vs. non-floating point
162 // situations. Used from within common macros where we need slightly
163 // different behavior for Float/Double
164 #define FP_SELECT_Boolean(intcode, fpcode) intcode
165 #define FP_SELECT_Byte(intcode, fpcode) intcode
166 #define FP_SELECT_Char(intcode, fpcode) intcode
167 #define FP_SELECT_Short(intcode, fpcode) intcode
168 #define FP_SELECT_Object(intcode, fpcode) intcode
169 #define FP_SELECT_Int(intcode, fpcode) intcode
170 #define FP_SELECT_Long(intcode, fpcode) intcode
171 #define FP_SELECT_Float(intcode, fpcode) fpcode
172 #define FP_SELECT_Double(intcode, fpcode) fpcode
173 #define FP_SELECT(TypeName, intcode, fpcode) \
174 FP_SELECT_##TypeName(intcode, fpcode)
175
176 // Choose DT_RETURN_MARK macros based on the type: float/double -> void
177 // (dtrace doesn't do FP yet)
178 #define DT_RETURN_MARK_DECL_FOR(TypeName, name, type, probe) \
179 FP_SELECT(TypeName, \
180 DT_RETURN_MARK_DECL(name, type, probe), DT_VOID_RETURN_MARK_DECL(name, probe) )
181 #define DT_RETURN_MARK_FOR(TypeName, name, type, ref) \
182 FP_SELECT(TypeName, \
183 DT_RETURN_MARK(name, type, ref), DT_VOID_RETURN_MARK(name) )
184
185
186 // out-of-line helpers for class jfieldIDWorkaround:
187
188 bool jfieldIDWorkaround::is_valid_jfieldID(Klass* k, jfieldID id) {
189 if (jfieldIDWorkaround::is_instance_jfieldID(k, id)) {
190 uintptr_t as_uint = (uintptr_t) id;
191 int offset = raw_instance_offset(id);
192 if (is_checked_jfieldID(id)) {
193 if (!klass_hash_ok(k, id)) {
194 return false;
195 }
196 }
197 return InstanceKlass::cast(k)->contains_field_offset(offset);
198 } else {
199 JNIid* result = (JNIid*) id;
200 #ifdef ASSERT
201 return result != nullptr && result->is_static_field_id();
202 #else
203 return result != nullptr;
204 #endif
205 }
206 }
207
208
209 intptr_t jfieldIDWorkaround::encode_klass_hash(Klass* k, int offset) {
210 if (offset <= small_offset_mask) {
211 Klass* field_klass = k;
212 Klass* super_klass = field_klass->super();
213 // With compressed oops the most super class with nonstatic fields would
214 // be the owner of fields embedded in the header.
215 while (InstanceKlass::cast(super_klass)->has_nonstatic_fields() &&
216 InstanceKlass::cast(super_klass)->contains_field_offset(offset)) {
217 field_klass = super_klass; // super contains the field also
218 super_klass = field_klass->super();
219 }
220 DEBUG_ONLY(NoSafepointVerifier nosafepoint;)
221 uintptr_t klass_hash = field_klass->identity_hash();
222 return ((klass_hash & klass_mask) << klass_shift) | checked_mask_in_place;
223 } else {
224 #if 0
225 #ifndef PRODUCT
226 {
227 ResourceMark rm;
228 warning("VerifyJNIFields: long offset %d in %s", offset, k->external_name());
229 }
230 #endif
231 #endif
232 return 0;
233 }
234 }
235
236 bool jfieldIDWorkaround::klass_hash_ok(Klass* k, jfieldID id) {
237 uintptr_t as_uint = (uintptr_t) id;
238 intptr_t klass_hash = (as_uint >> klass_shift) & klass_mask;
239 do {
240 DEBUG_ONLY(NoSafepointVerifier nosafepoint;)
241 // Could use a non-blocking query for identity_hash here...
242 if ((k->identity_hash() & klass_mask) == klass_hash)
243 return true;
244 k = k->super();
245 } while (k != nullptr);
246 return false;
247 }
248
249 void jfieldIDWorkaround::verify_instance_jfieldID(Klass* k, jfieldID id) {
250 guarantee(jfieldIDWorkaround::is_instance_jfieldID(k, id), "must be an instance field" );
251 uintptr_t as_uint = (uintptr_t) id;
252 int offset = raw_instance_offset(id);
253 if (VerifyJNIFields) {
254 if (is_checked_jfieldID(id)) {
255 guarantee(klass_hash_ok(k, id),
256 "Bug in native code: jfieldID class must match object");
257 } else {
258 #if 0
259 #ifndef PRODUCT
260 if (Verbose) {
261 ResourceMark rm;
262 warning("VerifyJNIFields: unverified offset %d for %s", offset, k->external_name());
263 }
264 #endif
265 #endif
266 }
267 }
268 guarantee(InstanceKlass::cast(k)->contains_field_offset(offset),
269 "Bug in native code: jfieldID offset must address interior of object");
270 }
271
272 // Implementation of JNI entries
273
274 DT_RETURN_MARK_DECL(DefineClass, jclass
275 , HOTSPOT_JNI_DEFINECLASS_RETURN(_ret_ref));
276
277 JNI_ENTRY(jclass, jni_DefineClass(JNIEnv *env, const char *name, jobject loaderRef,
278 const jbyte *buf, jsize bufLen))
279 HOTSPOT_JNI_DEFINECLASS_ENTRY(
280 env, (char*) name, loaderRef, (char*) buf, bufLen);
281
282 jclass cls = nullptr;
283 DT_RETURN_MARK(DefineClass, jclass, (const jclass&)cls);
284
285 // Class resolution will get the class name from the .class stream if the name is null.
286 TempNewSymbol class_name = name == nullptr ? nullptr :
287 SystemDictionary::class_name_symbol(name, vmSymbols::java_lang_NoClassDefFoundError(),
288 CHECK_NULL);
289
290 ResourceMark rm(THREAD);
291 ClassFileStream st((u1*)buf, bufLen, nullptr);
292 Handle class_loader (THREAD, JNIHandles::resolve(loaderRef));
293 Handle protection_domain;
294 ClassLoadInfo cl_info(protection_domain);
295 Klass* k = SystemDictionary::resolve_from_stream(&st, class_name,
296 class_loader,
297 cl_info,
298 CHECK_NULL);
299
300 if (log_is_enabled(Debug, class, resolve)) {
301 trace_class_resolution(k);
302 }
303
304 cls = (jclass)JNIHandles::make_local(THREAD, k->java_mirror());
305 return cls;
306 JNI_END
307
308
309
310 DT_RETURN_MARK_DECL(FindClass, jclass
311 , HOTSPOT_JNI_FINDCLASS_RETURN(_ret_ref));
312
313 JNI_ENTRY(jclass, jni_FindClass(JNIEnv *env, const char *name))
314 HOTSPOT_JNI_FINDCLASS_ENTRY(env, (char *)name);
315
316 jclass result = nullptr;
317 DT_RETURN_MARK(FindClass, jclass, (const jclass&)result);
318
319 // This should be ClassNotFoundException imo.
320 TempNewSymbol class_name =
321 SystemDictionary::class_name_symbol(name, vmSymbols::java_lang_NoClassDefFoundError(),
322 CHECK_NULL);
323
324 // Find calling class
325 Klass* k = thread->security_get_caller_class(0);
326 // default to the system loader when no context
327 Handle loader(THREAD, SystemDictionary::java_system_loader());
328 if (k != nullptr) {
329 // Special handling to make sure JNI_OnLoad and JNI_OnUnload are executed
330 // in the correct class context.
331 if (k->class_loader() == nullptr &&
332 k->name() == vmSymbols::jdk_internal_loader_NativeLibraries()) {
333 JavaValue result(T_OBJECT);
334 JavaCalls::call_static(&result, k,
335 vmSymbols::getFromClass_name(),
336 vmSymbols::void_class_signature(),
337 CHECK_NULL);
338 // When invoked from JNI_OnLoad, NativeLibraries::getFromClass returns
339 // a non-null Class object. When invoked from JNI_OnUnload,
340 // it will return null to indicate no context.
341 oop mirror = result.get_oop();
342 if (mirror != nullptr) {
343 Klass* fromClass = java_lang_Class::as_Klass(mirror);
344 loader = Handle(THREAD, fromClass->class_loader());
345 }
346 } else {
347 loader = Handle(THREAD, k->class_loader());
348 }
349 }
350
351 result = find_class_from_class_loader(env, class_name, true, loader, true, thread);
352
353 if (log_is_enabled(Debug, class, resolve) && result != nullptr) {
354 trace_class_resolution(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(result)));
355 }
356
357 return result;
358 JNI_END
359
360 DT_RETURN_MARK_DECL(FromReflectedMethod, jmethodID
361 , HOTSPOT_JNI_FROMREFLECTEDMETHOD_RETURN((uintptr_t)_ret_ref));
362
363 JNI_ENTRY(jmethodID, jni_FromReflectedMethod(JNIEnv *env, jobject method))
364 HOTSPOT_JNI_FROMREFLECTEDMETHOD_ENTRY(env, method);
365
366 jmethodID ret = nullptr;
367 DT_RETURN_MARK(FromReflectedMethod, jmethodID, (const jmethodID&)ret);
368
369 // method is a handle to a java.lang.reflect.Method object
370 oop reflected = JNIHandles::resolve_non_null(method);
371 oop mirror = nullptr;
372 int slot = 0;
373
374 if (reflected->klass() == vmClasses::reflect_Constructor_klass()) {
375 mirror = java_lang_reflect_Constructor::clazz(reflected);
376 slot = java_lang_reflect_Constructor::slot(reflected);
377 } else {
378 assert(reflected->klass() == vmClasses::reflect_Method_klass(), "wrong type");
379 mirror = java_lang_reflect_Method::clazz(reflected);
380 slot = java_lang_reflect_Method::slot(reflected);
381 }
382 Klass* k1 = java_lang_Class::as_Klass(mirror);
383
384 // Make sure class is initialized before handing id's out to methods
385 k1->initialize(CHECK_NULL);
386 Method* m = InstanceKlass::cast(k1)->method_with_idnum(slot);
387 ret = m==nullptr? nullptr : m->jmethod_id(); // return null if reflected method deleted
388 return ret;
389 JNI_END
390
391 DT_RETURN_MARK_DECL(FromReflectedField, jfieldID
392 , HOTSPOT_JNI_FROMREFLECTEDFIELD_RETURN((uintptr_t)_ret_ref));
393
394 JNI_ENTRY(jfieldID, jni_FromReflectedField(JNIEnv *env, jobject field))
395 HOTSPOT_JNI_FROMREFLECTEDFIELD_ENTRY(env, field);
396
397 jfieldID ret = nullptr;
398 DT_RETURN_MARK(FromReflectedField, jfieldID, (const jfieldID&)ret);
399
400 // field is a handle to a java.lang.reflect.Field object
401 oop reflected = JNIHandles::resolve_non_null(field);
402 oop mirror = java_lang_reflect_Field::clazz(reflected);
403 Klass* k1 = java_lang_Class::as_Klass(mirror);
404 int slot = java_lang_reflect_Field::slot(reflected);
405 int modifiers = java_lang_reflect_Field::modifiers(reflected);
406
407 // Make sure class is initialized before handing id's out to fields
408 k1->initialize(CHECK_NULL);
409
410 // First check if this is a static field
411 if (modifiers & JVM_ACC_STATIC) {
412 int offset = InstanceKlass::cast(k1)->field_offset( slot );
413 JNIid* id = InstanceKlass::cast(k1)->jni_id_for(offset);
414 assert(id != nullptr, "corrupt Field object");
415 DEBUG_ONLY(id->set_is_static_field_id();)
416 // A jfieldID for a static field is a JNIid specifying the field holder and the offset within the Klass*
417 ret = jfieldIDWorkaround::to_static_jfieldID(id);
418 return ret;
419 }
420
421 // The slot is the index of the field description in the field-array
422 // The jfieldID is the offset of the field within the object
423 // It may also have hash bits for k, if VerifyJNIFields is turned on.
424 int offset = InstanceKlass::cast(k1)->field_offset( slot );
425 bool is_flat = InstanceKlass::cast(k1)->field_is_flat(slot);
426 assert(InstanceKlass::cast(k1)->contains_field_offset(offset), "stay within object");
427 ret = jfieldIDWorkaround::to_instance_jfieldID(k1, offset, is_flat);
428 return ret;
429 JNI_END
430
431
432 DT_RETURN_MARK_DECL(ToReflectedMethod, jobject
433 , HOTSPOT_JNI_TOREFLECTEDMETHOD_RETURN(_ret_ref));
434
435 JNI_ENTRY(jobject, jni_ToReflectedMethod(JNIEnv *env, jclass cls, jmethodID method_id, jboolean isStatic))
436 HOTSPOT_JNI_TOREFLECTEDMETHOD_ENTRY(env, cls, (uintptr_t) method_id, isStatic);
437
438 jobject ret = nullptr;
439 DT_RETURN_MARK(ToReflectedMethod, jobject, (const jobject&)ret);
440
441 methodHandle m (THREAD, Method::resolve_jmethod_id(method_id));
442 assert(m->is_static() == (isStatic != 0), "jni_ToReflectedMethod access flags doesn't match");
443 oop reflection_method;
444 if (m->is_object_constructor()) {
445 reflection_method = Reflection::new_constructor(m, CHECK_NULL);
446 } else {
447 // Note: Static initializers can theoretically be here, if JNI users manage
448 // to get their jmethodID. Record them as plain methods.
449 reflection_method = Reflection::new_method(m, false, CHECK_NULL);
450 }
451 ret = JNIHandles::make_local(THREAD, reflection_method);
452 return ret;
453 JNI_END
454
455 DT_RETURN_MARK_DECL(GetSuperclass, jclass
456 , HOTSPOT_JNI_GETSUPERCLASS_RETURN(_ret_ref));
457
458 JNI_ENTRY(jclass, jni_GetSuperclass(JNIEnv *env, jclass sub))
459 HOTSPOT_JNI_GETSUPERCLASS_ENTRY(env, sub);
460
461 jclass obj = nullptr;
462 DT_RETURN_MARK(GetSuperclass, jclass, (const jclass&)obj);
463
464 oop mirror = JNIHandles::resolve_non_null(sub);
465 // primitive classes return null
466 if (java_lang_Class::is_primitive(mirror)) return nullptr;
467
468 // Rules of Class.getSuperClass as implemented by KLass::java_super:
469 // arrays return Object
470 // interfaces return null
471 // proper classes return Klass::super()
472 Klass* k = java_lang_Class::as_Klass(mirror);
473 if (k->is_interface()) return nullptr;
474
475 // return mirror for superclass
476 Klass* super = k->java_super();
477 // super2 is the value computed by the compiler's getSuperClass intrinsic:
478 DEBUG_ONLY(Klass* super2 = ( k->is_array_klass()
479 ? vmClasses::Object_klass()
480 : k->super() ) );
481 assert(super == super2,
482 "java_super computation depends on interface, array, other super");
483 obj = (super == nullptr) ? nullptr : (jclass) JNIHandles::make_local(THREAD, super->java_mirror());
484 return obj;
485 JNI_END
486
487 JNI_ENTRY_NO_PRESERVE(jboolean, jni_IsAssignableFrom(JNIEnv *env, jclass sub, jclass super))
488 HOTSPOT_JNI_ISASSIGNABLEFROM_ENTRY(env, sub, super);
489
490 oop sub_mirror = JNIHandles::resolve_non_null(sub);
491 oop super_mirror = JNIHandles::resolve_non_null(super);
492 if (java_lang_Class::is_primitive(sub_mirror) ||
493 java_lang_Class::is_primitive(super_mirror)) {
494 jboolean ret = (sub_mirror == super_mirror);
495
496 HOTSPOT_JNI_ISASSIGNABLEFROM_RETURN(ret);
497 return ret;
498 }
499 Klass* sub_klass = java_lang_Class::as_Klass(sub_mirror);
500 Klass* super_klass = java_lang_Class::as_Klass(super_mirror);
501 assert(sub_klass != nullptr && super_klass != nullptr, "invalid arguments to jni_IsAssignableFrom");
502 jboolean ret = sub_klass->is_subtype_of(super_klass) ?
503 JNI_TRUE : JNI_FALSE;
504
505 HOTSPOT_JNI_ISASSIGNABLEFROM_RETURN(ret);
506 return ret;
507 JNI_END
508
509
510 DT_RETURN_MARK_DECL(Throw, jint
511 , HOTSPOT_JNI_THROW_RETURN(_ret_ref));
512
513 JNI_ENTRY(jint, jni_Throw(JNIEnv *env, jthrowable obj))
514 HOTSPOT_JNI_THROW_ENTRY(env, obj);
515
516 jint ret = JNI_OK;
517 DT_RETURN_MARK(Throw, jint, (const jint&)ret);
518
519 THROW_OOP_(JNIHandles::resolve(obj), JNI_OK);
520 ShouldNotReachHere();
521 return 0; // Mute compiler.
522 JNI_END
523
524
525 DT_RETURN_MARK_DECL(ThrowNew, jint
526 , HOTSPOT_JNI_THROWNEW_RETURN(_ret_ref));
527
528 JNI_ENTRY(jint, jni_ThrowNew(JNIEnv *env, jclass clazz, const char *message))
529 HOTSPOT_JNI_THROWNEW_ENTRY(env, clazz, (char *) message);
530
531 jint ret = JNI_OK;
532 DT_RETURN_MARK(ThrowNew, jint, (const jint&)ret);
533
534 InstanceKlass* k = InstanceKlass::cast(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz)));
535 Symbol* name = k->name();
536 Handle class_loader (THREAD, k->class_loader());
537 THROW_MSG_LOADER_(name, (char *)message, class_loader, JNI_OK);
538 ShouldNotReachHere();
539 return 0; // Mute compiler.
540 JNI_END
541
542
543 // JNI functions only transform a pending async exception to a synchronous
544 // exception in ExceptionOccurred and ExceptionCheck calls, since
545 // delivering an async exception in other places won't change the native
546 // code's control flow and would be harmful when native code further calls
547 // JNI functions with a pending exception. Async exception is also checked
548 // during the call, so ExceptionOccurred/ExceptionCheck won't return
549 // false but deliver the async exception at the very end during
550 // state transition.
551
552 static void jni_check_async_exceptions(JavaThread *thread) {
553 assert(thread == Thread::current(), "must be itself");
554 if (thread->has_async_exception_condition()) {
555 SafepointMechanism::process_if_requested_with_exit_check(thread, true /* check asyncs */);
556 }
557 }
558
559 JNI_ENTRY_NO_PRESERVE(jthrowable, jni_ExceptionOccurred(JNIEnv *env))
560 HOTSPOT_JNI_EXCEPTIONOCCURRED_ENTRY(env);
561
562 jni_check_async_exceptions(thread);
563 oop exception = thread->pending_exception();
564 jthrowable ret = (jthrowable) JNIHandles::make_local(THREAD, exception);
565
566 HOTSPOT_JNI_EXCEPTIONOCCURRED_RETURN(ret);
567 return ret;
568 JNI_END
569
570
571 JNI_ENTRY_NO_PRESERVE(void, jni_ExceptionDescribe(JNIEnv *env))
572 HOTSPOT_JNI_EXCEPTIONDESCRIBE_ENTRY(env);
573
574 if (thread->has_pending_exception()) {
575 Handle ex(thread, thread->pending_exception());
576 thread->clear_pending_exception();
577 jio_fprintf(defaultStream::error_stream(), "Exception ");
578 if (thread != nullptr && thread->threadObj() != nullptr) {
579 ResourceMark rm(THREAD);
580 jio_fprintf(defaultStream::error_stream(),
581 "in thread \"%s\" ", thread->name());
582 }
583 if (ex->is_a(vmClasses::Throwable_klass())) {
584 JavaValue result(T_VOID);
585 JavaCalls::call_virtual(&result,
586 ex,
587 vmClasses::Throwable_klass(),
588 vmSymbols::printStackTrace_name(),
589 vmSymbols::void_method_signature(),
590 THREAD);
591 // If an exception is thrown in the call it gets thrown away. Not much
592 // we can do with it. The native code that calls this, does not check
593 // for the exception - hence, it might still be in the thread when DestroyVM gets
594 // called, potentially causing a few asserts to trigger - since no pending exception
595 // is expected.
596 CLEAR_PENDING_EXCEPTION;
597 } else {
598 ResourceMark rm(THREAD);
599 jio_fprintf(defaultStream::error_stream(),
600 ". Uncaught exception of type %s.",
601 ex->klass()->external_name());
602 }
603 }
604
605 HOTSPOT_JNI_EXCEPTIONDESCRIBE_RETURN();
606 JNI_END
607
608
609 JNI_ENTRY_NO_PRESERVE(void, jni_ExceptionClear(JNIEnv *env))
610 HOTSPOT_JNI_EXCEPTIONCLEAR_ENTRY(env);
611
612 // The jni code might be using this API to clear java thrown exception.
613 // So just mark jvmti thread exception state as exception caught.
614 JvmtiThreadState *state = JavaThread::current()->jvmti_thread_state();
615 if (state != nullptr && state->is_exception_detected()) {
616 state->set_exception_caught();
617 }
618 thread->clear_pending_exception();
619
620 HOTSPOT_JNI_EXCEPTIONCLEAR_RETURN();
621 JNI_END
622
623
624 JNI_ENTRY(void, jni_FatalError(JNIEnv *env, const char *msg))
625 HOTSPOT_JNI_FATALERROR_ENTRY(env, (char *) msg);
626
627 tty->print_cr("FATAL ERROR in native method: %s", msg);
628 thread->print_jni_stack();
629 os::abort(); // Dump core and abort
630 JNI_END
631
632
633 JNI_ENTRY(jint, jni_PushLocalFrame(JNIEnv *env, jint capacity))
634 HOTSPOT_JNI_PUSHLOCALFRAME_ENTRY(env, capacity);
635
636 //%note jni_11
637 if (capacity < 0 ||
638 ((MaxJNILocalCapacity > 0) && (capacity > MaxJNILocalCapacity))) {
639 HOTSPOT_JNI_PUSHLOCALFRAME_RETURN((uint32_t)JNI_ERR);
640 return JNI_ERR;
641 }
642
643 thread->push_jni_handle_block();
644 jint ret = JNI_OK;
645 HOTSPOT_JNI_PUSHLOCALFRAME_RETURN(ret);
646 return ret;
647 JNI_END
648
649
650 JNI_ENTRY(jobject, jni_PopLocalFrame(JNIEnv *env, jobject result))
651 HOTSPOT_JNI_POPLOCALFRAME_ENTRY(env, result);
652
653 //%note jni_11
654 Handle result_handle(thread, JNIHandles::resolve(result));
655 JNIHandleBlock* old_handles = thread->active_handles();
656 JNIHandleBlock* new_handles = old_handles->pop_frame_link();
657 if (new_handles != nullptr) {
658 // As a sanity check we only release the handle blocks if the pop_frame_link is not null.
659 // This way code will still work if PopLocalFrame is called without a corresponding
660 // PushLocalFrame call. Note that we set the pop_frame_link to null explicitly, otherwise
661 // the release_block call will release the blocks.
662 thread->set_active_handles(new_handles);
663 old_handles->set_pop_frame_link(nullptr); // clear link we won't release new_handles below
664 JNIHandleBlock::release_block(old_handles, thread); // may block
665 result = JNIHandles::make_local(thread, result_handle());
666 }
667 HOTSPOT_JNI_POPLOCALFRAME_RETURN(result);
668 return result;
669 JNI_END
670
671
672 JNI_ENTRY(jobject, jni_NewGlobalRef(JNIEnv *env, jobject ref))
673 HOTSPOT_JNI_NEWGLOBALREF_ENTRY(env, ref);
674
675 Handle ref_handle(thread, JNIHandles::resolve(ref));
676 jobject ret = JNIHandles::make_global(ref_handle, AllocFailStrategy::RETURN_NULL);
677
678 HOTSPOT_JNI_NEWGLOBALREF_RETURN(ret);
679 return ret;
680 JNI_END
681
682 // Must be JNI_ENTRY (with HandleMark)
683 JNI_ENTRY_NO_PRESERVE(void, jni_DeleteGlobalRef(JNIEnv *env, jobject ref))
684 HOTSPOT_JNI_DELETEGLOBALREF_ENTRY(env, ref);
685
686 JNIHandles::destroy_global(ref);
687
688 HOTSPOT_JNI_DELETEGLOBALREF_RETURN();
689 JNI_END
690
691 JNI_ENTRY_NO_PRESERVE(void, jni_DeleteLocalRef(JNIEnv *env, jobject obj))
692 HOTSPOT_JNI_DELETELOCALREF_ENTRY(env, obj);
693
694 JNIHandles::destroy_local(obj);
695
696 HOTSPOT_JNI_DELETELOCALREF_RETURN();
697 JNI_END
698
699 JNI_ENTRY_NO_PRESERVE(jboolean, jni_IsSameObject(JNIEnv *env, jobject r1, jobject r2))
700 HOTSPOT_JNI_ISSAMEOBJECT_ENTRY(env, r1, r2);
701
702 jboolean ret = JNIHandles::is_same_object(r1, r2) ? JNI_TRUE : JNI_FALSE;
703
704 HOTSPOT_JNI_ISSAMEOBJECT_RETURN(ret);
705 return ret;
706 JNI_END
707
708
709 JNI_ENTRY(jobject, jni_NewLocalRef(JNIEnv *env, jobject ref))
710 HOTSPOT_JNI_NEWLOCALREF_ENTRY(env, ref);
711
712 jobject ret = JNIHandles::make_local(THREAD, JNIHandles::resolve(ref),
713 AllocFailStrategy::RETURN_NULL);
714
715 HOTSPOT_JNI_NEWLOCALREF_RETURN(ret);
716 return ret;
717 JNI_END
718
719 JNI_LEAF(jint, jni_EnsureLocalCapacity(JNIEnv *env, jint capacity))
720 HOTSPOT_JNI_ENSURELOCALCAPACITY_ENTRY(env, capacity);
721
722 jint ret;
723 if (capacity >= 0 &&
724 ((MaxJNILocalCapacity <= 0) || (capacity <= MaxJNILocalCapacity))) {
725 ret = JNI_OK;
726 } else {
727 ret = JNI_ERR;
728 }
729
730 HOTSPOT_JNI_ENSURELOCALCAPACITY_RETURN(ret);
731 return ret;
732 JNI_END
733
734 // Return the Handle Type
735 JNI_LEAF(jobjectRefType, jni_GetObjectRefType(JNIEnv *env, jobject obj))
736 HOTSPOT_JNI_GETOBJECTREFTYPE_ENTRY(env, obj);
737
738 jobjectRefType ret = JNIInvalidRefType;
739 if (obj != nullptr) {
740 ret = JNIHandles::handle_type(thread, obj);
741 }
742
743 HOTSPOT_JNI_GETOBJECTREFTYPE_RETURN((void *) ret);
744 return ret;
745 JNI_END
746
747
748 class JNI_ArgumentPusher : public SignatureIterator {
749 protected:
750 JavaCallArguments* _arguments;
751
752 void push_int(jint x) { _arguments->push_int(x); }
753 void push_long(jlong x) { _arguments->push_long(x); }
754 void push_float(jfloat x) { _arguments->push_float(x); }
755 void push_double(jdouble x) { _arguments->push_double(x); }
756 void push_object(jobject x) { _arguments->push_jobject(x); }
757
758 void push_boolean(jboolean b) {
759 // Normalize boolean arguments from native code by converting 1-255 to JNI_TRUE and
760 // 0 to JNI_FALSE. Boolean return values from native are normalized the same in
761 // TemplateInterpreterGenerator::generate_result_handler_for and
762 // SharedRuntime::generate_native_wrapper.
763 push_int(b == 0 ? JNI_FALSE : JNI_TRUE);
764 }
765
766 JNI_ArgumentPusher(Method* method)
767 : SignatureIterator(method->signature(),
768 Fingerprinter(methodHandle(Thread::current(), method)).fingerprint())
769 {
770 _arguments = nullptr;
771 }
772
773 public:
774 virtual void push_arguments_on(JavaCallArguments* arguments) = 0;
775 };
776
777
778 class JNI_ArgumentPusherVaArg : public JNI_ArgumentPusher {
779 va_list _ap;
780
781 void set_ap(va_list rap) {
782 va_copy(_ap, rap);
783 }
784
785 friend class SignatureIterator; // so do_parameters_on can call do_type
786 void do_type(BasicType type) {
787 switch (type) {
788 // these are coerced to int when using va_arg
789 case T_BYTE:
790 case T_CHAR:
791 case T_SHORT:
792 case T_INT: push_int(va_arg(_ap, jint)); break;
793 case T_BOOLEAN: push_boolean((jboolean) va_arg(_ap, jint)); break;
794
795 // each of these paths is exercised by the various jck Call[Static,Nonvirtual,][Void,Int,..]Method[A,V,] tests
796
797 case T_LONG: push_long(va_arg(_ap, jlong)); break;
798 // float is coerced to double w/ va_arg
799 case T_FLOAT: push_float((jfloat) va_arg(_ap, jdouble)); break;
800 case T_DOUBLE: push_double(va_arg(_ap, jdouble)); break;
801
802 case T_ARRAY:
803 case T_OBJECT: push_object(va_arg(_ap, jobject)); break;
804 default: ShouldNotReachHere();
805 }
806 }
807
808 public:
809 JNI_ArgumentPusherVaArg(jmethodID method_id, va_list rap)
810 : JNI_ArgumentPusher(Method::resolve_jmethod_id(method_id)) {
811 set_ap(rap);
812 }
813
814 ~JNI_ArgumentPusherVaArg() {
815 va_end(_ap);
816 }
817
818 virtual void push_arguments_on(JavaCallArguments* arguments) {
819 _arguments = arguments;
820 do_parameters_on(this);
821 }
822 };
823
824
825 class JNI_ArgumentPusherArray : public JNI_ArgumentPusher {
826 protected:
827 const jvalue *_ap;
828
829 inline void set_ap(const jvalue *rap) { _ap = rap; }
830
831 friend class SignatureIterator; // so do_parameters_on can call do_type
832 void do_type(BasicType type) {
833 switch (type) {
834 case T_CHAR: push_int((_ap++)->c); break;
835 case T_SHORT: push_int((_ap++)->s); break;
836 case T_BYTE: push_int((_ap++)->b); break;
837 case T_INT: push_int((_ap++)->i); break;
838 case T_BOOLEAN: push_boolean((_ap++)->z); break;
839 case T_LONG: push_long((_ap++)->j); break;
840 case T_FLOAT: push_float((_ap++)->f); break;
841 case T_DOUBLE: push_double((_ap++)->d); break;
842 case T_ARRAY:
843 case T_OBJECT: push_object((_ap++)->l); break;
844 default: ShouldNotReachHere();
845 }
846 }
847
848 public:
849 JNI_ArgumentPusherArray(jmethodID method_id, const jvalue *rap)
850 : JNI_ArgumentPusher(Method::resolve_jmethod_id(method_id)) {
851 set_ap(rap);
852 }
853
854 virtual void push_arguments_on(JavaCallArguments* arguments) {
855 _arguments = arguments;
856 do_parameters_on(this);
857 }
858 };
859
860
861 enum JNICallType {
862 JNI_STATIC,
863 JNI_VIRTUAL,
864 JNI_NONVIRTUAL
865 };
866
867
868
869 static void jni_invoke_static(JNIEnv *env, JavaValue* result, jobject receiver, JNICallType call_type, jmethodID method_id, JNI_ArgumentPusher *args, TRAPS) {
870 methodHandle method(THREAD, Method::resolve_jmethod_id(method_id));
871
872 // Create object to hold arguments for the JavaCall, and associate it with
873 // the jni parser
874 ResourceMark rm(THREAD);
875 int number_of_parameters = method->size_of_parameters();
876 JavaCallArguments java_args(number_of_parameters);
877
878 assert(method->is_static(), "method should be static");
879
880 // Fill out JavaCallArguments object
881 args->push_arguments_on(&java_args);
882 // Initialize result type
883 result->set_type(args->return_type());
884
885 // Invoke the method. Result is returned as oop.
886 JavaCalls::call(result, method, &java_args, CHECK);
887
888 // Convert result
889 if (is_reference_type(result->get_type())) {
890 result->set_jobject(JNIHandles::make_local(THREAD, result->get_oop()));
891 }
892 }
893
894
895 static void jni_invoke_nonstatic(JNIEnv *env, JavaValue* result, jobject receiver, JNICallType call_type, jmethodID method_id, JNI_ArgumentPusher *args, TRAPS) {
896 oop recv = JNIHandles::resolve(receiver);
897 if (recv == nullptr) {
898 THROW(vmSymbols::java_lang_NullPointerException());
899 }
900 Handle h_recv(THREAD, recv);
901
902 int number_of_parameters;
903 Method* selected_method;
904 {
905 Method* m = Method::resolve_jmethod_id(method_id);
906 number_of_parameters = m->size_of_parameters();
907 InstanceKlass* holder = m->method_holder();
908 if (call_type != JNI_VIRTUAL) {
909 selected_method = m;
910 } else if (!m->has_itable_index()) {
911 // non-interface call -- for that little speed boost, don't handlize
912 DEBUG_ONLY(NoSafepointVerifier nosafepoint;)
913 // jni_GetMethodID makes sure class is linked and initialized
914 // so m should have a valid vtable index.
915 assert(m->valid_vtable_index(), "no valid vtable index");
916 int vtbl_index = m->vtable_index();
917 if (vtbl_index != Method::nonvirtual_vtable_index) {
918 selected_method = h_recv->klass()->method_at_vtable(vtbl_index);
919 } else {
920 // final method
921 selected_method = m;
922 }
923 } else {
924 // interface call
925 int itbl_index = m->itable_index();
926 Klass* k = h_recv->klass();
927 selected_method = InstanceKlass::cast(k)->method_at_itable(holder, itbl_index, CHECK);
928 }
929 }
930
931 if (selected_method->is_abstract()) {
932 ResourceMark rm(THREAD);
933 THROW_MSG(vmSymbols::java_lang_AbstractMethodError(), selected_method->name()->as_C_string());
934 }
935
936 methodHandle method(THREAD, selected_method);
937
938 // Create object to hold arguments for the JavaCall, and associate it with
939 // the jni parser
940 ResourceMark rm(THREAD);
941 JavaCallArguments java_args(number_of_parameters);
942
943 // handle arguments
944 assert(!method->is_static(), "method %s should not be static", method->name_and_sig_as_C_string());
945 java_args.push_oop(h_recv); // Push jobject handle
946
947 // Fill out JavaCallArguments object
948 args->push_arguments_on(&java_args);
949 // Initialize result type
950 result->set_type(args->return_type());
951
952 // Invoke the method. Result is returned as oop.
953 JavaCalls::call(result, method, &java_args, CHECK);
954
955 // Convert result
956 if (is_reference_type(result->get_type())) {
957 result->set_jobject(JNIHandles::make_local(THREAD, result->get_oop()));
958 }
959 }
960
961 DT_RETURN_MARK_DECL(AllocObject, jobject
962 , HOTSPOT_JNI_ALLOCOBJECT_RETURN(_ret_ref));
963
964 JNI_ENTRY(jobject, jni_AllocObject(JNIEnv *env, jclass clazz))
965 HOTSPOT_JNI_ALLOCOBJECT_ENTRY(env, clazz);
966
967 jobject ret = nullptr;
968 DT_RETURN_MARK(AllocObject, jobject, (const jobject&)ret);
969
970 oop clazzoop = JNIHandles::resolve_non_null(clazz);
971 Klass* k = java_lang_Class::as_Klass(clazzoop);
972 if (k == nullptr || k->is_inline_klass()) {
973 ResourceMark rm(THREAD);
974 THROW_(vmSymbols::java_lang_InstantiationException(), nullptr);
975 }
976 instanceOop i = InstanceKlass::allocate_instance(clazzoop, CHECK_NULL);
977 ret = JNIHandles::make_local(THREAD, i);
978 return ret;
979 JNI_END
980
981 DT_RETURN_MARK_DECL(NewObjectA, jobject
982 , HOTSPOT_JNI_NEWOBJECTA_RETURN(_ret_ref));
983
984 JNI_ENTRY(jobject, jni_NewObjectA(JNIEnv *env, jclass clazz, jmethodID methodID, const jvalue *args))
985 HOTSPOT_JNI_NEWOBJECTA_ENTRY(env, clazz, (uintptr_t) methodID);
986
987 jobject obj = nullptr;
988 DT_RETURN_MARK(NewObjectA, jobject, (const jobject&)obj);
989
990 oop clazzoop = JNIHandles::resolve_non_null(clazz);
991 Klass* k = java_lang_Class::as_Klass(clazzoop);
992 if (k == nullptr) {
993 ResourceMark rm(THREAD);
994 THROW_(vmSymbols::java_lang_InstantiationException(), nullptr);
995 }
996
997 instanceOop i = InstanceKlass::allocate_instance(clazzoop, CHECK_NULL);
998 obj = JNIHandles::make_local(THREAD, i);
999 JavaValue jvalue(T_VOID);
1000 JNI_ArgumentPusherArray ap(methodID, args);
1001 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_NULL);
1002
1003 return obj;
1004 JNI_END
1005
1006
1007 DT_RETURN_MARK_DECL(NewObjectV, jobject
1008 , HOTSPOT_JNI_NEWOBJECTV_RETURN(_ret_ref));
1009
1010 JNI_ENTRY(jobject, jni_NewObjectV(JNIEnv *env, jclass clazz, jmethodID methodID, va_list args))
1011 HOTSPOT_JNI_NEWOBJECTV_ENTRY(env, clazz, (uintptr_t) methodID);
1012
1013 jobject obj = nullptr;
1014 DT_RETURN_MARK(NewObjectV, jobject, (const jobject&)obj);
1015
1016 oop clazzoop = JNIHandles::resolve_non_null(clazz);
1017 Klass* k = java_lang_Class::as_Klass(clazzoop);
1018 if (k == nullptr) {
1019 ResourceMark rm(THREAD);
1020 THROW_(vmSymbols::java_lang_InstantiationException(), nullptr);
1021 }
1022
1023 instanceOop i = InstanceKlass::allocate_instance(clazzoop, CHECK_NULL);
1024 obj = JNIHandles::make_local(THREAD, i);
1025 JavaValue jvalue(T_VOID);
1026 JNI_ArgumentPusherVaArg ap(methodID, args);
1027 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_NULL);
1028
1029 return obj;
1030 JNI_END
1031
1032
1033 DT_RETURN_MARK_DECL(NewObject, jobject
1034 , HOTSPOT_JNI_NEWOBJECT_RETURN(_ret_ref));
1035
1036 JNI_ENTRY(jobject, jni_NewObject(JNIEnv *env, jclass clazz, jmethodID methodID, ...))
1037 HOTSPOT_JNI_NEWOBJECT_ENTRY(env, clazz, (uintptr_t) methodID);
1038
1039 jobject obj = nullptr;
1040 DT_RETURN_MARK(NewObject, jobject, (const jobject&)obj);
1041
1042 oop clazzoop = JNIHandles::resolve_non_null(clazz);
1043 Klass* k = java_lang_Class::as_Klass(clazzoop);
1044 if (k == nullptr) {
1045 ResourceMark rm(THREAD);
1046 THROW_(vmSymbols::java_lang_InstantiationException(), nullptr);
1047 }
1048
1049 instanceOop i = InstanceKlass::allocate_instance(clazzoop, CHECK_NULL);
1050 obj = JNIHandles::make_local(THREAD, i);
1051 va_list args;
1052 va_start(args, methodID);
1053 JavaValue jvalue(T_VOID);
1054 JNI_ArgumentPusherVaArg ap(methodID, args);
1055 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_NULL);
1056 va_end(args);
1057
1058 return obj;
1059 JNI_END
1060
1061
1062 JNI_ENTRY(jclass, jni_GetObjectClass(JNIEnv *env, jobject obj))
1063 HOTSPOT_JNI_GETOBJECTCLASS_ENTRY(env, obj);
1064
1065 Klass* k = JNIHandles::resolve_non_null(obj)->klass();
1066 jclass ret =
1067 (jclass) JNIHandles::make_local(THREAD, k->java_mirror());
1068
1069 HOTSPOT_JNI_GETOBJECTCLASS_RETURN(ret);
1070 return ret;
1071 JNI_END
1072
1073 JNI_ENTRY_NO_PRESERVE(jboolean, jni_IsInstanceOf(JNIEnv *env, jobject obj, jclass clazz))
1074 HOTSPOT_JNI_ISINSTANCEOF_ENTRY(env, obj, clazz);
1075
1076 jboolean ret = JNI_TRUE;
1077 if (obj != nullptr) {
1078 ret = JNI_FALSE;
1079 Klass* k = java_lang_Class::as_Klass(
1080 JNIHandles::resolve_non_null(clazz));
1081 if (k != nullptr) {
1082 ret = JNIHandles::resolve_non_null(obj)->is_a(k) ? JNI_TRUE : JNI_FALSE;
1083 }
1084 }
1085
1086 HOTSPOT_JNI_ISINSTANCEOF_RETURN(ret);
1087 return ret;
1088 JNI_END
1089
1090
1091 static jmethodID get_method_id(JNIEnv *env, jclass clazz, const char *name_str,
1092 const char *sig, bool is_static, TRAPS) {
1093 // %%%% This code should probably just call into a method in the LinkResolver
1094 //
1095 // The class should have been loaded (we have an instance of the class
1096 // passed in) so the method and signature should already be in the symbol
1097 // table. If they're not there, the method doesn't exist.
1098 const char *name_to_probe = (name_str == nullptr)
1099 ? vmSymbols::object_initializer_name()->as_C_string()
1100 : name_str;
1101 TempNewSymbol name = SymbolTable::probe(name_to_probe, (int)strlen(name_to_probe));
1102 TempNewSymbol signature = SymbolTable::probe(sig, (int)strlen(sig));
1103
1104 if (name == nullptr || signature == nullptr) {
1105 THROW_MSG_NULL(vmSymbols::java_lang_NoSuchMethodError(), name_str);
1106 }
1107
1108 oop mirror = JNIHandles::resolve_non_null(clazz);
1109 Klass* klass = java_lang_Class::as_Klass(mirror);
1110
1111 // Throw a NoSuchMethodError exception if we have an instance of a
1112 // primitive java.lang.Class
1113 if (java_lang_Class::is_primitive(mirror)) {
1114 ResourceMark rm(THREAD);
1115 THROW_MSG_NULL(vmSymbols::java_lang_NoSuchMethodError(), err_msg("%s%s.%s%s", is_static ? "static " : "", klass->signature_name(), name_str, sig));
1116 }
1117
1118 // Make sure class is linked and initialized before handing id's out to
1119 // Method*s.
1120 klass->initialize(CHECK_NULL);
1121
1122 Method* m;
1123 if (name == vmSymbols::object_initializer_name() ||
1124 name == vmSymbols::class_initializer_name()) {
1125 // Never search superclasses for constructors
1126 if (klass->is_instance_klass()) {
1127 m = InstanceKlass::cast(klass)->find_method(name, signature);
1128 } else {
1129 m = nullptr;
1130 }
1131 } else {
1132 m = klass->lookup_method(name, signature);
1133 if (m == nullptr && klass->is_instance_klass()) {
1134 m = InstanceKlass::cast(klass)->lookup_method_in_ordered_interfaces(name, signature);
1135 }
1136 }
1137 if (m == nullptr || (m->is_static() != is_static)) {
1138 ResourceMark rm(THREAD);
1139 THROW_MSG_NULL(vmSymbols::java_lang_NoSuchMethodError(), err_msg("%s%s.%s%s", is_static ? "static " : "", klass->signature_name(), name_str, sig));
1140 }
1141 return m->jmethod_id();
1142 }
1143
1144
1145 JNI_ENTRY(jmethodID, jni_GetMethodID(JNIEnv *env, jclass clazz,
1146 const char *name, const char *sig))
1147 HOTSPOT_JNI_GETMETHODID_ENTRY(env, clazz, (char *) name, (char *) sig);
1148 jmethodID ret = get_method_id(env, clazz, name, sig, false, thread);
1149 HOTSPOT_JNI_GETMETHODID_RETURN((uintptr_t) ret);
1150 return ret;
1151 JNI_END
1152
1153
1154 JNI_ENTRY(jmethodID, jni_GetStaticMethodID(JNIEnv *env, jclass clazz,
1155 const char *name, const char *sig))
1156 HOTSPOT_JNI_GETSTATICMETHODID_ENTRY(env, (char *) clazz, (char *) name, (char *)sig);
1157 jmethodID ret = get_method_id(env, clazz, name, sig, true, thread);
1158 HOTSPOT_JNI_GETSTATICMETHODID_RETURN((uintptr_t) ret);
1159 return ret;
1160 JNI_END
1161
1162
1163
1164 //
1165 // Calling Methods
1166 //
1167
1168
1169 #define DEFINE_CALLMETHOD(ResultType, Result, Tag \
1170 , EntryProbe, ReturnProbe) \
1171 \
1172 DT_RETURN_MARK_DECL_FOR(Result, Call##Result##Method, ResultType \
1173 , ReturnProbe); \
1174 \
1175 JNI_ENTRY(ResultType, \
1176 jni_Call##Result##Method(JNIEnv *env, jobject obj, jmethodID methodID, ...)) \
1177 \
1178 EntryProbe; \
1179 ResultType ret{}; \
1180 DT_RETURN_MARK_FOR(Result, Call##Result##Method, ResultType, \
1181 (const ResultType&)ret);\
1182 \
1183 va_list args; \
1184 va_start(args, methodID); \
1185 JavaValue jvalue(Tag); \
1186 JNI_ArgumentPusherVaArg ap(methodID, args); \
1187 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK_(ResultType{})); \
1188 va_end(args); \
1189 ret = jvalue.get_##ResultType(); \
1190 return ret;\
1191 JNI_END
1192
1193 // the runtime type of subword integral basic types is integer
1194 DEFINE_CALLMETHOD(jboolean, Boolean, T_BOOLEAN
1195 , HOTSPOT_JNI_CALLBOOLEANMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1196 HOTSPOT_JNI_CALLBOOLEANMETHOD_RETURN(_ret_ref))
1197 DEFINE_CALLMETHOD(jbyte, Byte, T_BYTE
1198 , HOTSPOT_JNI_CALLBYTEMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1199 HOTSPOT_JNI_CALLBYTEMETHOD_RETURN(_ret_ref))
1200 DEFINE_CALLMETHOD(jchar, Char, T_CHAR
1201 , HOTSPOT_JNI_CALLCHARMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1202 HOTSPOT_JNI_CALLCHARMETHOD_RETURN(_ret_ref))
1203 DEFINE_CALLMETHOD(jshort, Short, T_SHORT
1204 , HOTSPOT_JNI_CALLSHORTMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1205 HOTSPOT_JNI_CALLSHORTMETHOD_RETURN(_ret_ref))
1206
1207 DEFINE_CALLMETHOD(jobject, Object, T_OBJECT
1208 , HOTSPOT_JNI_CALLOBJECTMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1209 HOTSPOT_JNI_CALLOBJECTMETHOD_RETURN(_ret_ref))
1210 DEFINE_CALLMETHOD(jint, Int, T_INT,
1211 HOTSPOT_JNI_CALLINTMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1212 HOTSPOT_JNI_CALLINTMETHOD_RETURN(_ret_ref))
1213 DEFINE_CALLMETHOD(jlong, Long, T_LONG
1214 , HOTSPOT_JNI_CALLLONGMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1215 HOTSPOT_JNI_CALLLONGMETHOD_RETURN(_ret_ref))
1216 // Float and double probes don't return value because dtrace doesn't currently support it
1217 DEFINE_CALLMETHOD(jfloat, Float, T_FLOAT
1218 , HOTSPOT_JNI_CALLFLOATMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1219 HOTSPOT_JNI_CALLFLOATMETHOD_RETURN())
1220 DEFINE_CALLMETHOD(jdouble, Double, T_DOUBLE
1221 , HOTSPOT_JNI_CALLDOUBLEMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1222 HOTSPOT_JNI_CALLDOUBLEMETHOD_RETURN())
1223
1224 #define DEFINE_CALLMETHODV(ResultType, Result, Tag \
1225 , EntryProbe, ReturnProbe) \
1226 \
1227 DT_RETURN_MARK_DECL_FOR(Result, Call##Result##MethodV, ResultType \
1228 , ReturnProbe); \
1229 \
1230 JNI_ENTRY(ResultType, \
1231 jni_Call##Result##MethodV(JNIEnv *env, jobject obj, jmethodID methodID, va_list args)) \
1232 \
1233 EntryProbe;\
1234 ResultType ret{}; \
1235 DT_RETURN_MARK_FOR(Result, Call##Result##MethodV, ResultType, \
1236 (const ResultType&)ret);\
1237 \
1238 JavaValue jvalue(Tag); \
1239 JNI_ArgumentPusherVaArg ap(methodID, args); \
1240 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK_(ResultType{})); \
1241 ret = jvalue.get_##ResultType(); \
1242 return ret;\
1243 JNI_END
1244
1245 // the runtime type of subword integral basic types is integer
1246 DEFINE_CALLMETHODV(jboolean, Boolean, T_BOOLEAN
1247 , HOTSPOT_JNI_CALLBOOLEANMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1248 HOTSPOT_JNI_CALLBOOLEANMETHODV_RETURN(_ret_ref))
1249 DEFINE_CALLMETHODV(jbyte, Byte, T_BYTE
1250 , HOTSPOT_JNI_CALLBYTEMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1251 HOTSPOT_JNI_CALLBYTEMETHODV_RETURN(_ret_ref))
1252 DEFINE_CALLMETHODV(jchar, Char, T_CHAR
1253 , HOTSPOT_JNI_CALLCHARMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1254 HOTSPOT_JNI_CALLCHARMETHODV_RETURN(_ret_ref))
1255 DEFINE_CALLMETHODV(jshort, Short, T_SHORT
1256 , HOTSPOT_JNI_CALLSHORTMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1257 HOTSPOT_JNI_CALLSHORTMETHODV_RETURN(_ret_ref))
1258
1259 DEFINE_CALLMETHODV(jobject, Object, T_OBJECT
1260 , HOTSPOT_JNI_CALLOBJECTMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1261 HOTSPOT_JNI_CALLOBJECTMETHODV_RETURN(_ret_ref))
1262 DEFINE_CALLMETHODV(jint, Int, T_INT,
1263 HOTSPOT_JNI_CALLINTMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1264 HOTSPOT_JNI_CALLINTMETHODV_RETURN(_ret_ref))
1265 DEFINE_CALLMETHODV(jlong, Long, T_LONG
1266 , HOTSPOT_JNI_CALLLONGMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1267 HOTSPOT_JNI_CALLLONGMETHODV_RETURN(_ret_ref))
1268 // Float and double probes don't return value because dtrace doesn't currently support it
1269 DEFINE_CALLMETHODV(jfloat, Float, T_FLOAT
1270 , HOTSPOT_JNI_CALLFLOATMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1271 HOTSPOT_JNI_CALLFLOATMETHODV_RETURN())
1272 DEFINE_CALLMETHODV(jdouble, Double, T_DOUBLE
1273 , HOTSPOT_JNI_CALLDOUBLEMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1274 HOTSPOT_JNI_CALLDOUBLEMETHODV_RETURN())
1275
1276 #define DEFINE_CALLMETHODA(ResultType, Result, Tag \
1277 , EntryProbe, ReturnProbe) \
1278 \
1279 DT_RETURN_MARK_DECL_FOR(Result, Call##Result##MethodA, ResultType \
1280 , ReturnProbe); \
1281 \
1282 JNI_ENTRY(ResultType, \
1283 jni_Call##Result##MethodA(JNIEnv *env, jobject obj, jmethodID methodID, const jvalue *args)) \
1284 EntryProbe; \
1285 ResultType ret{}; \
1286 DT_RETURN_MARK_FOR(Result, Call##Result##MethodA, ResultType, \
1287 (const ResultType&)ret);\
1288 \
1289 JavaValue jvalue(Tag); \
1290 JNI_ArgumentPusherArray ap(methodID, args); \
1291 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK_(ResultType{})); \
1292 ret = jvalue.get_##ResultType(); \
1293 return ret;\
1294 JNI_END
1295
1296 // the runtime type of subword integral basic types is integer
1297 DEFINE_CALLMETHODA(jboolean, Boolean, T_BOOLEAN
1298 , HOTSPOT_JNI_CALLBOOLEANMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1299 HOTSPOT_JNI_CALLBOOLEANMETHODA_RETURN(_ret_ref))
1300 DEFINE_CALLMETHODA(jbyte, Byte, T_BYTE
1301 , HOTSPOT_JNI_CALLBYTEMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1302 HOTSPOT_JNI_CALLBYTEMETHODA_RETURN(_ret_ref))
1303 DEFINE_CALLMETHODA(jchar, Char, T_CHAR
1304 , HOTSPOT_JNI_CALLCHARMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1305 HOTSPOT_JNI_CALLCHARMETHODA_RETURN(_ret_ref))
1306 DEFINE_CALLMETHODA(jshort, Short, T_SHORT
1307 , HOTSPOT_JNI_CALLSHORTMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1308 HOTSPOT_JNI_CALLSHORTMETHODA_RETURN(_ret_ref))
1309
1310 DEFINE_CALLMETHODA(jobject, Object, T_OBJECT
1311 , HOTSPOT_JNI_CALLOBJECTMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1312 HOTSPOT_JNI_CALLOBJECTMETHODA_RETURN(_ret_ref))
1313 DEFINE_CALLMETHODA(jint, Int, T_INT,
1314 HOTSPOT_JNI_CALLINTMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1315 HOTSPOT_JNI_CALLINTMETHODA_RETURN(_ret_ref))
1316 DEFINE_CALLMETHODA(jlong, Long, T_LONG
1317 , HOTSPOT_JNI_CALLLONGMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1318 HOTSPOT_JNI_CALLLONGMETHODA_RETURN(_ret_ref))
1319 // Float and double probes don't return value because dtrace doesn't currently support it
1320 DEFINE_CALLMETHODA(jfloat, Float, T_FLOAT
1321 , HOTSPOT_JNI_CALLFLOATMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1322 HOTSPOT_JNI_CALLFLOATMETHODA_RETURN())
1323 DEFINE_CALLMETHODA(jdouble, Double, T_DOUBLE
1324 , HOTSPOT_JNI_CALLDOUBLEMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1325 HOTSPOT_JNI_CALLDOUBLEMETHODA_RETURN())
1326
1327 DT_VOID_RETURN_MARK_DECL(CallVoidMethod, HOTSPOT_JNI_CALLVOIDMETHOD_RETURN());
1328 DT_VOID_RETURN_MARK_DECL(CallVoidMethodV, HOTSPOT_JNI_CALLVOIDMETHODV_RETURN());
1329 DT_VOID_RETURN_MARK_DECL(CallVoidMethodA, HOTSPOT_JNI_CALLVOIDMETHODA_RETURN());
1330
1331
1332 JNI_ENTRY(void, jni_CallVoidMethod(JNIEnv *env, jobject obj, jmethodID methodID, ...))
1333 HOTSPOT_JNI_CALLVOIDMETHOD_ENTRY(env, obj, (uintptr_t) methodID);
1334 DT_VOID_RETURN_MARK(CallVoidMethod);
1335
1336 va_list args;
1337 va_start(args, methodID);
1338 JavaValue jvalue(T_VOID);
1339 JNI_ArgumentPusherVaArg ap(methodID, args);
1340 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK);
1341 va_end(args);
1342 JNI_END
1343
1344
1345 JNI_ENTRY(void, jni_CallVoidMethodV(JNIEnv *env, jobject obj, jmethodID methodID, va_list args))
1346 HOTSPOT_JNI_CALLVOIDMETHODV_ENTRY(env, obj, (uintptr_t) methodID);
1347 DT_VOID_RETURN_MARK(CallVoidMethodV);
1348
1349 JavaValue jvalue(T_VOID);
1350 JNI_ArgumentPusherVaArg ap(methodID, args);
1351 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK);
1352 JNI_END
1353
1354
1355 JNI_ENTRY(void, jni_CallVoidMethodA(JNIEnv *env, jobject obj, jmethodID methodID, const jvalue *args))
1356 HOTSPOT_JNI_CALLVOIDMETHODA_ENTRY(env, obj, (uintptr_t) methodID);
1357 DT_VOID_RETURN_MARK(CallVoidMethodA);
1358
1359 JavaValue jvalue(T_VOID);
1360 JNI_ArgumentPusherArray ap(methodID, args);
1361 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK);
1362 JNI_END
1363
1364
1365
1366 #define DEFINE_CALLNONVIRTUALMETHOD(ResultType, Result, Tag \
1367 , EntryProbe, ReturnProbe) \
1368 \
1369 DT_RETURN_MARK_DECL_FOR(Result, CallNonvirtual##Result##Method, ResultType \
1370 , ReturnProbe);\
1371 \
1372 JNI_ENTRY(ResultType, \
1373 jni_CallNonvirtual##Result##Method(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, ...)) \
1374 \
1375 EntryProbe;\
1376 ResultType ret;\
1377 DT_RETURN_MARK_FOR(Result, CallNonvirtual##Result##Method, ResultType, \
1378 (const ResultType&)ret);\
1379 \
1380 va_list args; \
1381 va_start(args, methodID); \
1382 JavaValue jvalue(Tag); \
1383 JNI_ArgumentPusherVaArg ap(methodID, args); \
1384 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_(ResultType{})); \
1385 va_end(args); \
1386 ret = jvalue.get_##ResultType(); \
1387 return ret;\
1388 JNI_END
1389
1390 // the runtime type of subword integral basic types is integer
1391 DEFINE_CALLNONVIRTUALMETHOD(jboolean, Boolean, T_BOOLEAN
1392 , HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1393 HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHOD_RETURN(_ret_ref))
1394 DEFINE_CALLNONVIRTUALMETHOD(jbyte, Byte, T_BYTE
1395 , HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1396 HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHOD_RETURN(_ret_ref))
1397 DEFINE_CALLNONVIRTUALMETHOD(jchar, Char, T_CHAR
1398 , HOTSPOT_JNI_CALLNONVIRTUALCHARMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1399 HOTSPOT_JNI_CALLNONVIRTUALCHARMETHOD_RETURN(_ret_ref))
1400 DEFINE_CALLNONVIRTUALMETHOD(jshort, Short, T_SHORT
1401 , HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1402 HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHOD_RETURN(_ret_ref))
1403
1404 DEFINE_CALLNONVIRTUALMETHOD(jobject, Object, T_OBJECT
1405 , HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1406 HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHOD_RETURN(_ret_ref))
1407 DEFINE_CALLNONVIRTUALMETHOD(jint, Int, T_INT
1408 , HOTSPOT_JNI_CALLNONVIRTUALINTMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1409 HOTSPOT_JNI_CALLNONVIRTUALINTMETHOD_RETURN(_ret_ref))
1410 DEFINE_CALLNONVIRTUALMETHOD(jlong, Long, T_LONG
1411 , HOTSPOT_JNI_CALLNONVIRTUALLONGMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1412 // Float and double probes don't return value because dtrace doesn't currently support it
1413 HOTSPOT_JNI_CALLNONVIRTUALLONGMETHOD_RETURN(_ret_ref))
1414 DEFINE_CALLNONVIRTUALMETHOD(jfloat, Float, T_FLOAT
1415 , HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1416 HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHOD_RETURN())
1417 DEFINE_CALLNONVIRTUALMETHOD(jdouble, Double, T_DOUBLE
1418 , HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1419 HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHOD_RETURN())
1420
1421 #define DEFINE_CALLNONVIRTUALMETHODV(ResultType, Result, Tag \
1422 , EntryProbe, ReturnProbe) \
1423 \
1424 DT_RETURN_MARK_DECL_FOR(Result, CallNonvirtual##Result##MethodV, ResultType \
1425 , ReturnProbe);\
1426 \
1427 JNI_ENTRY(ResultType, \
1428 jni_CallNonvirtual##Result##MethodV(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, va_list args)) \
1429 \
1430 EntryProbe;\
1431 ResultType ret;\
1432 DT_RETURN_MARK_FOR(Result, CallNonvirtual##Result##MethodV, ResultType, \
1433 (const ResultType&)ret);\
1434 \
1435 JavaValue jvalue(Tag); \
1436 JNI_ArgumentPusherVaArg ap(methodID, args); \
1437 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_(ResultType{})); \
1438 ret = jvalue.get_##ResultType(); \
1439 return ret;\
1440 JNI_END
1441
1442 // the runtime type of subword integral basic types is integer
1443 DEFINE_CALLNONVIRTUALMETHODV(jboolean, Boolean, T_BOOLEAN
1444 , HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1445 HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHODV_RETURN(_ret_ref))
1446 DEFINE_CALLNONVIRTUALMETHODV(jbyte, Byte, T_BYTE
1447 , HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1448 HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHODV_RETURN(_ret_ref))
1449 DEFINE_CALLNONVIRTUALMETHODV(jchar, Char, T_CHAR
1450 , HOTSPOT_JNI_CALLNONVIRTUALCHARMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1451 HOTSPOT_JNI_CALLNONVIRTUALCHARMETHODV_RETURN(_ret_ref))
1452 DEFINE_CALLNONVIRTUALMETHODV(jshort, Short, T_SHORT
1453 , HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1454 HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHODV_RETURN(_ret_ref))
1455
1456 DEFINE_CALLNONVIRTUALMETHODV(jobject, Object, T_OBJECT
1457 , HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1458 HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHODV_RETURN(_ret_ref))
1459 DEFINE_CALLNONVIRTUALMETHODV(jint, Int, T_INT
1460 , HOTSPOT_JNI_CALLNONVIRTUALINTMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1461 HOTSPOT_JNI_CALLNONVIRTUALINTMETHODV_RETURN(_ret_ref))
1462 DEFINE_CALLNONVIRTUALMETHODV(jlong, Long, T_LONG
1463 , HOTSPOT_JNI_CALLNONVIRTUALLONGMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1464 // Float and double probes don't return value because dtrace doesn't currently support it
1465 HOTSPOT_JNI_CALLNONVIRTUALLONGMETHODV_RETURN(_ret_ref))
1466 DEFINE_CALLNONVIRTUALMETHODV(jfloat, Float, T_FLOAT
1467 , HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1468 HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHODV_RETURN())
1469 DEFINE_CALLNONVIRTUALMETHODV(jdouble, Double, T_DOUBLE
1470 , HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1471 HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHODV_RETURN())
1472
1473 #define DEFINE_CALLNONVIRTUALMETHODA(ResultType, Result, Tag \
1474 , EntryProbe, ReturnProbe) \
1475 \
1476 DT_RETURN_MARK_DECL_FOR(Result, CallNonvirtual##Result##MethodA, ResultType \
1477 , ReturnProbe);\
1478 \
1479 JNI_ENTRY(ResultType, \
1480 jni_CallNonvirtual##Result##MethodA(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, const jvalue *args)) \
1481 \
1482 EntryProbe;\
1483 ResultType ret;\
1484 DT_RETURN_MARK_FOR(Result, CallNonvirtual##Result##MethodA, ResultType, \
1485 (const ResultType&)ret);\
1486 \
1487 JavaValue jvalue(Tag); \
1488 JNI_ArgumentPusherArray ap(methodID, args); \
1489 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_(ResultType{})); \
1490 ret = jvalue.get_##ResultType(); \
1491 return ret;\
1492 JNI_END
1493
1494 // the runtime type of subword integral basic types is integer
1495 DEFINE_CALLNONVIRTUALMETHODA(jboolean, Boolean, T_BOOLEAN
1496 , HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1497 HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHODA_RETURN(_ret_ref))
1498 DEFINE_CALLNONVIRTUALMETHODA(jbyte, Byte, T_BYTE
1499 , HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1500 HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHODA_RETURN(_ret_ref))
1501 DEFINE_CALLNONVIRTUALMETHODA(jchar, Char, T_CHAR
1502 , HOTSPOT_JNI_CALLNONVIRTUALCHARMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1503 HOTSPOT_JNI_CALLNONVIRTUALCHARMETHODA_RETURN(_ret_ref))
1504 DEFINE_CALLNONVIRTUALMETHODA(jshort, Short, T_SHORT
1505 , HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1506 HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHODA_RETURN(_ret_ref))
1507
1508 DEFINE_CALLNONVIRTUALMETHODA(jobject, Object, T_OBJECT
1509 , HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1510 HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHODA_RETURN(_ret_ref))
1511 DEFINE_CALLNONVIRTUALMETHODA(jint, Int, T_INT
1512 , HOTSPOT_JNI_CALLNONVIRTUALINTMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1513 HOTSPOT_JNI_CALLNONVIRTUALINTMETHODA_RETURN(_ret_ref))
1514 DEFINE_CALLNONVIRTUALMETHODA(jlong, Long, T_LONG
1515 , HOTSPOT_JNI_CALLNONVIRTUALLONGMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1516 // Float and double probes don't return value because dtrace doesn't currently support it
1517 HOTSPOT_JNI_CALLNONVIRTUALLONGMETHODA_RETURN(_ret_ref))
1518 DEFINE_CALLNONVIRTUALMETHODA(jfloat, Float, T_FLOAT
1519 , HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1520 HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHODA_RETURN())
1521 DEFINE_CALLNONVIRTUALMETHODA(jdouble, Double, T_DOUBLE
1522 , HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1523 HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHODA_RETURN())
1524
1525 DT_VOID_RETURN_MARK_DECL(CallNonvirtualVoidMethod
1526 , HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHOD_RETURN());
1527 DT_VOID_RETURN_MARK_DECL(CallNonvirtualVoidMethodV
1528 , HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHODV_RETURN());
1529 DT_VOID_RETURN_MARK_DECL(CallNonvirtualVoidMethodA
1530 , HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHODA_RETURN());
1531
1532 JNI_ENTRY(void, jni_CallNonvirtualVoidMethod(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, ...))
1533 HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHOD_ENTRY(env, obj, cls, (uintptr_t) methodID);
1534 DT_VOID_RETURN_MARK(CallNonvirtualVoidMethod);
1535
1536 va_list args;
1537 va_start(args, methodID);
1538 JavaValue jvalue(T_VOID);
1539 JNI_ArgumentPusherVaArg ap(methodID, args);
1540 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK);
1541 va_end(args);
1542 JNI_END
1543
1544
1545 JNI_ENTRY(void, jni_CallNonvirtualVoidMethodV(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, va_list args))
1546 HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHODV_ENTRY(
1547 env, obj, cls, (uintptr_t) methodID);
1548 DT_VOID_RETURN_MARK(CallNonvirtualVoidMethodV);
1549
1550 JavaValue jvalue(T_VOID);
1551 JNI_ArgumentPusherVaArg ap(methodID, args);
1552 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK);
1553 JNI_END
1554
1555
1556 JNI_ENTRY(void, jni_CallNonvirtualVoidMethodA(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, const jvalue *args))
1557 HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHODA_ENTRY(
1558 env, obj, cls, (uintptr_t) methodID);
1559 DT_VOID_RETURN_MARK(CallNonvirtualVoidMethodA);
1560 JavaValue jvalue(T_VOID);
1561 JNI_ArgumentPusherArray ap(methodID, args);
1562 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK);
1563 JNI_END
1564
1565
1566
1567 #define DEFINE_CALLSTATICMETHOD(ResultType, Result, Tag \
1568 , EntryProbe, ResultProbe) \
1569 \
1570 DT_RETURN_MARK_DECL_FOR(Result, CallStatic##Result##Method, ResultType \
1571 , ResultProbe); \
1572 \
1573 JNI_ENTRY(ResultType, \
1574 jni_CallStatic##Result##Method(JNIEnv *env, jclass cls, jmethodID methodID, ...)) \
1575 \
1576 EntryProbe; \
1577 ResultType ret{}; \
1578 DT_RETURN_MARK_FOR(Result, CallStatic##Result##Method, ResultType, \
1579 (const ResultType&)ret);\
1580 \
1581 va_list args; \
1582 va_start(args, methodID); \
1583 JavaValue jvalue(Tag); \
1584 JNI_ArgumentPusherVaArg ap(methodID, args); \
1585 jni_invoke_static(env, &jvalue, nullptr, JNI_STATIC, methodID, &ap, CHECK_(ResultType{})); \
1586 va_end(args); \
1587 ret = jvalue.get_##ResultType(); \
1588 return ret;\
1589 JNI_END
1590
1591 // the runtime type of subword integral basic types is integer
1592 DEFINE_CALLSTATICMETHOD(jboolean, Boolean, T_BOOLEAN
1593 , HOTSPOT_JNI_CALLSTATICBOOLEANMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1594 HOTSPOT_JNI_CALLSTATICBOOLEANMETHOD_RETURN(_ret_ref));
1595 DEFINE_CALLSTATICMETHOD(jbyte, Byte, T_BYTE
1596 , HOTSPOT_JNI_CALLSTATICBYTEMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1597 HOTSPOT_JNI_CALLSTATICBYTEMETHOD_RETURN(_ret_ref));
1598 DEFINE_CALLSTATICMETHOD(jchar, Char, T_CHAR
1599 , HOTSPOT_JNI_CALLSTATICCHARMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1600 HOTSPOT_JNI_CALLSTATICCHARMETHOD_RETURN(_ret_ref));
1601 DEFINE_CALLSTATICMETHOD(jshort, Short, T_SHORT
1602 , HOTSPOT_JNI_CALLSTATICSHORTMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1603 HOTSPOT_JNI_CALLSTATICSHORTMETHOD_RETURN(_ret_ref));
1604
1605 DEFINE_CALLSTATICMETHOD(jobject, Object, T_OBJECT
1606 , HOTSPOT_JNI_CALLSTATICOBJECTMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1607 HOTSPOT_JNI_CALLSTATICOBJECTMETHOD_RETURN(_ret_ref));
1608 DEFINE_CALLSTATICMETHOD(jint, Int, T_INT
1609 , HOTSPOT_JNI_CALLSTATICINTMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1610 HOTSPOT_JNI_CALLSTATICINTMETHOD_RETURN(_ret_ref));
1611 DEFINE_CALLSTATICMETHOD(jlong, Long, T_LONG
1612 , HOTSPOT_JNI_CALLSTATICLONGMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1613 HOTSPOT_JNI_CALLSTATICLONGMETHOD_RETURN(_ret_ref));
1614 // Float and double probes don't return value because dtrace doesn't currently support it
1615 DEFINE_CALLSTATICMETHOD(jfloat, Float, T_FLOAT
1616 , HOTSPOT_JNI_CALLSTATICFLOATMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1617 HOTSPOT_JNI_CALLSTATICFLOATMETHOD_RETURN());
1618 DEFINE_CALLSTATICMETHOD(jdouble, Double, T_DOUBLE
1619 , HOTSPOT_JNI_CALLSTATICDOUBLEMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1620 HOTSPOT_JNI_CALLSTATICDOUBLEMETHOD_RETURN());
1621
1622 #define DEFINE_CALLSTATICMETHODV(ResultType, Result, Tag \
1623 , EntryProbe, ResultProbe) \
1624 \
1625 DT_RETURN_MARK_DECL_FOR(Result, CallStatic##Result##MethodV, ResultType \
1626 , ResultProbe); \
1627 \
1628 JNI_ENTRY(ResultType, \
1629 jni_CallStatic##Result##MethodV(JNIEnv *env, jclass cls, jmethodID methodID, va_list args)) \
1630 \
1631 EntryProbe; \
1632 ResultType ret{}; \
1633 DT_RETURN_MARK_FOR(Result, CallStatic##Result##MethodV, ResultType, \
1634 (const ResultType&)ret);\
1635 \
1636 JavaValue jvalue(Tag); \
1637 JNI_ArgumentPusherVaArg ap(methodID, args); \
1638 /* Make sure class is initialized before trying to invoke its method */ \
1639 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); \
1640 k->initialize(CHECK_(ResultType{})); \
1641 jni_invoke_static(env, &jvalue, nullptr, JNI_STATIC, methodID, &ap, CHECK_(ResultType{})); \
1642 va_end(args); \
1643 ret = jvalue.get_##ResultType(); \
1644 return ret;\
1645 JNI_END
1646
1647 // the runtime type of subword integral basic types is integer
1648 DEFINE_CALLSTATICMETHODV(jboolean, Boolean, T_BOOLEAN
1649 , HOTSPOT_JNI_CALLSTATICBOOLEANMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1650 HOTSPOT_JNI_CALLSTATICBOOLEANMETHODV_RETURN(_ret_ref));
1651 DEFINE_CALLSTATICMETHODV(jbyte, Byte, T_BYTE
1652 , HOTSPOT_JNI_CALLSTATICBYTEMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1653 HOTSPOT_JNI_CALLSTATICBYTEMETHODV_RETURN(_ret_ref));
1654 DEFINE_CALLSTATICMETHODV(jchar, Char, T_CHAR
1655 , HOTSPOT_JNI_CALLSTATICCHARMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1656 HOTSPOT_JNI_CALLSTATICCHARMETHODV_RETURN(_ret_ref));
1657 DEFINE_CALLSTATICMETHODV(jshort, Short, T_SHORT
1658 , HOTSPOT_JNI_CALLSTATICSHORTMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1659 HOTSPOT_JNI_CALLSTATICSHORTMETHODV_RETURN(_ret_ref));
1660
1661 DEFINE_CALLSTATICMETHODV(jobject, Object, T_OBJECT
1662 , HOTSPOT_JNI_CALLSTATICOBJECTMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1663 HOTSPOT_JNI_CALLSTATICOBJECTMETHODV_RETURN(_ret_ref));
1664 DEFINE_CALLSTATICMETHODV(jint, Int, T_INT
1665 , HOTSPOT_JNI_CALLSTATICINTMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1666 HOTSPOT_JNI_CALLSTATICINTMETHODV_RETURN(_ret_ref));
1667 DEFINE_CALLSTATICMETHODV(jlong, Long, T_LONG
1668 , HOTSPOT_JNI_CALLSTATICLONGMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1669 HOTSPOT_JNI_CALLSTATICLONGMETHODV_RETURN(_ret_ref));
1670 // Float and double probes don't return value because dtrace doesn't currently support it
1671 DEFINE_CALLSTATICMETHODV(jfloat, Float, T_FLOAT
1672 , HOTSPOT_JNI_CALLSTATICFLOATMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1673 HOTSPOT_JNI_CALLSTATICFLOATMETHODV_RETURN());
1674 DEFINE_CALLSTATICMETHODV(jdouble, Double, T_DOUBLE
1675 , HOTSPOT_JNI_CALLSTATICDOUBLEMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1676 HOTSPOT_JNI_CALLSTATICDOUBLEMETHODV_RETURN());
1677
1678 #define DEFINE_CALLSTATICMETHODA(ResultType, Result, Tag \
1679 , EntryProbe, ResultProbe) \
1680 \
1681 DT_RETURN_MARK_DECL_FOR(Result, CallStatic##Result##MethodA, ResultType \
1682 , ResultProbe); \
1683 \
1684 JNI_ENTRY(ResultType, \
1685 jni_CallStatic##Result##MethodA(JNIEnv *env, jclass cls, jmethodID methodID, const jvalue *args)) \
1686 \
1687 EntryProbe; \
1688 ResultType ret{}; \
1689 DT_RETURN_MARK_FOR(Result, CallStatic##Result##MethodA, ResultType, \
1690 (const ResultType&)ret);\
1691 \
1692 JavaValue jvalue(Tag); \
1693 JNI_ArgumentPusherArray ap(methodID, args); \
1694 jni_invoke_static(env, &jvalue, nullptr, JNI_STATIC, methodID, &ap, CHECK_(ResultType{})); \
1695 ret = jvalue.get_##ResultType(); \
1696 return ret;\
1697 JNI_END
1698
1699 // the runtime type of subword integral basic types is integer
1700 DEFINE_CALLSTATICMETHODA(jboolean, Boolean, T_BOOLEAN
1701 , HOTSPOT_JNI_CALLSTATICBOOLEANMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1702 HOTSPOT_JNI_CALLSTATICBOOLEANMETHODA_RETURN(_ret_ref));
1703 DEFINE_CALLSTATICMETHODA(jbyte, Byte, T_BYTE
1704 , HOTSPOT_JNI_CALLSTATICBYTEMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1705 HOTSPOT_JNI_CALLSTATICBYTEMETHODA_RETURN(_ret_ref));
1706 DEFINE_CALLSTATICMETHODA(jchar, Char, T_CHAR
1707 , HOTSPOT_JNI_CALLSTATICCHARMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1708 HOTSPOT_JNI_CALLSTATICCHARMETHODA_RETURN(_ret_ref));
1709 DEFINE_CALLSTATICMETHODA(jshort, Short, T_SHORT
1710 , HOTSPOT_JNI_CALLSTATICSHORTMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1711 HOTSPOT_JNI_CALLSTATICSHORTMETHODA_RETURN(_ret_ref));
1712
1713 DEFINE_CALLSTATICMETHODA(jobject, Object, T_OBJECT
1714 , HOTSPOT_JNI_CALLSTATICOBJECTMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1715 HOTSPOT_JNI_CALLSTATICOBJECTMETHODA_RETURN(_ret_ref));
1716 DEFINE_CALLSTATICMETHODA(jint, Int, T_INT
1717 , HOTSPOT_JNI_CALLSTATICINTMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1718 HOTSPOT_JNI_CALLSTATICINTMETHODA_RETURN(_ret_ref));
1719 DEFINE_CALLSTATICMETHODA(jlong, Long, T_LONG
1720 , HOTSPOT_JNI_CALLSTATICLONGMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1721 HOTSPOT_JNI_CALLSTATICLONGMETHODA_RETURN(_ret_ref));
1722 // Float and double probes don't return value because dtrace doesn't currently support it
1723 DEFINE_CALLSTATICMETHODA(jfloat, Float, T_FLOAT
1724 , HOTSPOT_JNI_CALLSTATICFLOATMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1725 HOTSPOT_JNI_CALLSTATICFLOATMETHODA_RETURN());
1726 DEFINE_CALLSTATICMETHODA(jdouble, Double, T_DOUBLE
1727 , HOTSPOT_JNI_CALLSTATICDOUBLEMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1728 HOTSPOT_JNI_CALLSTATICDOUBLEMETHODA_RETURN());
1729
1730 DT_VOID_RETURN_MARK_DECL(CallStaticVoidMethod
1731 , HOTSPOT_JNI_CALLSTATICVOIDMETHOD_RETURN());
1732 DT_VOID_RETURN_MARK_DECL(CallStaticVoidMethodV
1733 , HOTSPOT_JNI_CALLSTATICVOIDMETHODV_RETURN());
1734 DT_VOID_RETURN_MARK_DECL(CallStaticVoidMethodA
1735 , HOTSPOT_JNI_CALLSTATICVOIDMETHODA_RETURN());
1736
1737 JNI_ENTRY(void, jni_CallStaticVoidMethod(JNIEnv *env, jclass cls, jmethodID methodID, ...))
1738 HOTSPOT_JNI_CALLSTATICVOIDMETHOD_ENTRY(env, cls, (uintptr_t) methodID);
1739 DT_VOID_RETURN_MARK(CallStaticVoidMethod);
1740
1741 va_list args;
1742 va_start(args, methodID);
1743 JavaValue jvalue(T_VOID);
1744 JNI_ArgumentPusherVaArg ap(methodID, args);
1745 jni_invoke_static(env, &jvalue, nullptr, JNI_STATIC, methodID, &ap, CHECK);
1746 va_end(args);
1747 JNI_END
1748
1749
1750 JNI_ENTRY(void, jni_CallStaticVoidMethodV(JNIEnv *env, jclass cls, jmethodID methodID, va_list args))
1751 HOTSPOT_JNI_CALLSTATICVOIDMETHODV_ENTRY(env, cls, (uintptr_t) methodID);
1752 DT_VOID_RETURN_MARK(CallStaticVoidMethodV);
1753
1754 JavaValue jvalue(T_VOID);
1755 JNI_ArgumentPusherVaArg ap(methodID, args);
1756 jni_invoke_static(env, &jvalue, nullptr, JNI_STATIC, methodID, &ap, CHECK);
1757 JNI_END
1758
1759
1760 JNI_ENTRY(void, jni_CallStaticVoidMethodA(JNIEnv *env, jclass cls, jmethodID methodID, const jvalue *args))
1761 HOTSPOT_JNI_CALLSTATICVOIDMETHODA_ENTRY(env, cls, (uintptr_t) methodID);
1762 DT_VOID_RETURN_MARK(CallStaticVoidMethodA);
1763
1764 JavaValue jvalue(T_VOID);
1765 JNI_ArgumentPusherArray ap(methodID, args);
1766 jni_invoke_static(env, &jvalue, nullptr, JNI_STATIC, methodID, &ap, CHECK);
1767 JNI_END
1768
1769
1770 //
1771 // Accessing Fields
1772 //
1773
1774
1775 DT_RETURN_MARK_DECL(GetFieldID, jfieldID
1776 , HOTSPOT_JNI_GETFIELDID_RETURN((uintptr_t)_ret_ref));
1777
1778 JNI_ENTRY(jfieldID, jni_GetFieldID(JNIEnv *env, jclass clazz,
1779 const char *name, const char *sig))
1780 HOTSPOT_JNI_GETFIELDID_ENTRY(env, clazz, (char *) name, (char *) sig);
1781 jfieldID ret = nullptr;
1782 DT_RETURN_MARK(GetFieldID, jfieldID, (const jfieldID&)ret);
1783
1784 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz));
1785
1786 // The class should have been loaded (we have an instance of the class
1787 // passed in) so the field and signature should already be in the symbol
1788 // table. If they're not there, the field doesn't exist.
1789 TempNewSymbol fieldname = SymbolTable::probe(name, (int)strlen(name));
1790 TempNewSymbol signame = SymbolTable::probe(sig, (int)strlen(sig));
1791 if (fieldname == nullptr || signame == nullptr) {
1792 ResourceMark rm;
1793 THROW_MSG_NULL(vmSymbols::java_lang_NoSuchFieldError(), err_msg("%s.%s %s", k->external_name(), name, sig));
1794 }
1795
1796 // Make sure class is initialized before handing id's out to fields
1797 k->initialize(CHECK_NULL);
1798
1799 fieldDescriptor fd;
1800 if (!k->is_instance_klass() ||
1801 !InstanceKlass::cast(k)->find_field(fieldname, signame, false, &fd)) {
1802 ResourceMark rm;
1803 THROW_MSG_NULL(vmSymbols::java_lang_NoSuchFieldError(), err_msg("%s.%s %s", k->external_name(), name, sig));
1804 }
1805
1806 // A jfieldID for a non-static field is simply the offset of the field within the instanceOop
1807 // It may also have hash bits for k, if VerifyJNIFields is turned on.
1808 ret = jfieldIDWorkaround::to_instance_jfieldID(k, fd.offset(), fd.is_flat());
1809 return ret;
1810 JNI_END
1811
1812
1813 JNI_ENTRY(jobject, jni_GetObjectField(JNIEnv *env, jobject obj, jfieldID fieldID))
1814 HOTSPOT_JNI_GETOBJECTFIELD_ENTRY(env, obj, (uintptr_t) fieldID);
1815 oop o = JNIHandles::resolve_non_null(obj);
1816 Klass* k = o->klass();
1817 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID);
1818 oop res = nullptr;
1819 // Keep JVMTI addition small and only check enabled flag here.
1820 // jni_GetField_probe() assumes that is okay to create handles.
1821 if (JvmtiExport::should_post_field_access()) {
1822 o = JvmtiExport::jni_GetField_probe(thread, obj, o, k, fieldID, false);
1823 }
1824 if (!jfieldIDWorkaround::is_flat_jfieldID(fieldID)) {
1825 res = HeapAccess<ON_UNKNOWN_OOP_REF>::oop_load_at(o, offset);
1826 } else {
1827 assert(k->is_instance_klass(), "Only instance can have flat fields");
1828 InstanceKlass* ik = InstanceKlass::cast(k);
1829 fieldDescriptor fd;
1830 bool found = ik->find_field_from_offset(offset, false, &fd); // performance bottleneck
1831 assert(found, "Field not found");
1832 InstanceKlass* holder = fd.field_holder();
1833 assert(holder->field_is_flat(fd.index()), "Must be");
1834 InlineLayoutInfo* li = holder->inline_layout_info_adr(fd.index());
1835 InlineKlass* field_vklass = li->klass();
1836 res = field_vklass->read_payload_from_addr(o, ik->field_offset(fd.index()), li->kind(), CHECK_NULL);
1837 }
1838 jobject ret = JNIHandles::make_local(THREAD, res);
1839 HOTSPOT_JNI_GETOBJECTFIELD_RETURN(ret);
1840 return ret;
1841 JNI_END
1842
1843 #define DEFINE_GETFIELD(Return,Fieldname,Result \
1844 , EntryProbe, ReturnProbe) \
1845 \
1846 DT_RETURN_MARK_DECL_FOR(Result, Get##Result##Field, Return \
1847 , ReturnProbe); \
1848 \
1849 JNI_ENTRY_NO_PRESERVE(Return, jni_Get##Result##Field(JNIEnv *env, jobject obj, jfieldID fieldID)) \
1850 \
1851 EntryProbe; \
1852 Return ret = 0;\
1853 DT_RETURN_MARK_FOR(Result, Get##Result##Field, Return, (const Return&)ret);\
1854 \
1855 oop o = JNIHandles::resolve_non_null(obj); \
1856 Klass* k = o->klass(); \
1857 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID); \
1858 /* Keep JVMTI addition small and only check enabled flag here. */ \
1859 if (JvmtiExport::should_post_field_access()) { \
1860 o = JvmtiExport::jni_GetField_probe(thread, obj, o, k, fieldID, false); \
1861 } \
1862 ret = o->Fieldname##_field(offset); \
1863 return ret; \
1864 JNI_END
1865
1866 DEFINE_GETFIELD(jboolean, bool, Boolean
1867 , HOTSPOT_JNI_GETBOOLEANFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
1868 HOTSPOT_JNI_GETBOOLEANFIELD_RETURN(_ret_ref))
1869 DEFINE_GETFIELD(jbyte, byte, Byte
1870 , HOTSPOT_JNI_GETBYTEFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
1871 HOTSPOT_JNI_GETBYTEFIELD_RETURN(_ret_ref))
1872 DEFINE_GETFIELD(jchar, char, Char
1873 , HOTSPOT_JNI_GETCHARFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
1874 HOTSPOT_JNI_GETCHARFIELD_RETURN(_ret_ref))
1875 DEFINE_GETFIELD(jshort, short, Short
1876 , HOTSPOT_JNI_GETSHORTFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
1877 HOTSPOT_JNI_GETSHORTFIELD_RETURN(_ret_ref))
1878 DEFINE_GETFIELD(jint, int, Int
1879 , HOTSPOT_JNI_GETINTFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
1880 HOTSPOT_JNI_GETINTFIELD_RETURN(_ret_ref))
1881 DEFINE_GETFIELD(jlong, long, Long
1882 , HOTSPOT_JNI_GETLONGFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
1883 HOTSPOT_JNI_GETLONGFIELD_RETURN(_ret_ref))
1884 // Float and double probes don't return value because dtrace doesn't currently support it
1885 DEFINE_GETFIELD(jfloat, float, Float
1886 , HOTSPOT_JNI_GETFLOATFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
1887 HOTSPOT_JNI_GETFLOATFIELD_RETURN())
1888 DEFINE_GETFIELD(jdouble, double, Double
1889 , HOTSPOT_JNI_GETDOUBLEFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
1890 HOTSPOT_JNI_GETDOUBLEFIELD_RETURN())
1891
1892 address jni_GetBooleanField_addr() {
1893 return (address)jni_GetBooleanField;
1894 }
1895 address jni_GetByteField_addr() {
1896 return (address)jni_GetByteField;
1897 }
1898 address jni_GetCharField_addr() {
1899 return (address)jni_GetCharField;
1900 }
1901 address jni_GetShortField_addr() {
1902 return (address)jni_GetShortField;
1903 }
1904 address jni_GetIntField_addr() {
1905 return (address)jni_GetIntField;
1906 }
1907 address jni_GetLongField_addr() {
1908 return (address)jni_GetLongField;
1909 }
1910 address jni_GetFloatField_addr() {
1911 return (address)jni_GetFloatField;
1912 }
1913 address jni_GetDoubleField_addr() {
1914 return (address)jni_GetDoubleField;
1915 }
1916
1917 JNI_ENTRY_NO_PRESERVE(void, jni_SetObjectField(JNIEnv *env, jobject obj, jfieldID fieldID, jobject value))
1918 HOTSPOT_JNI_SETOBJECTFIELD_ENTRY(env, obj, (uintptr_t) fieldID, value);
1919 oop o = JNIHandles::resolve_non_null(obj);
1920 Klass* k = o->klass();
1921 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID);
1922 // Keep JVMTI addition small and only check enabled flag here.
1923 if (JvmtiExport::should_post_field_modification()) {
1924 jvalue field_value;
1925 field_value.l = value;
1926 o = JvmtiExport::jni_SetField_probe(thread, obj, o, k, fieldID, false, JVM_SIGNATURE_CLASS, (jvalue *)&field_value);
1927 }
1928 if (!jfieldIDWorkaround::is_flat_jfieldID(fieldID)) {
1929 oop v = JNIHandles::resolve(value);
1930 if (v == nullptr) {
1931 InstanceKlass *ik = InstanceKlass::cast(k);
1932 fieldDescriptor fd;
1933 ik->find_field_from_offset(offset, false, &fd);
1934 if (fd.is_null_free_inline_type()) {
1935 THROW_MSG(vmSymbols::java_lang_NullPointerException(), "Cannot store null in a null-restricted field");
1936 }
1937 }
1938 HeapAccess<ON_UNKNOWN_OOP_REF>::oop_store_at(o, offset, v);
1939 } else {
1940 assert(k->is_instance_klass(), "Only instances can have flat fields");
1941 InstanceKlass* ik = InstanceKlass::cast(k);
1942 fieldDescriptor fd;
1943 ik->find_field_from_offset(offset, false, &fd);
1944 InstanceKlass* holder = fd.field_holder();
1945 InlineLayoutInfo* li = holder->inline_layout_info_adr(fd.index());
1946 InlineKlass* vklass = li->klass();
1947 oop v = JNIHandles::resolve(value);
1948 vklass->write_value_to_addr(v, ((char*)(oopDesc*)o) + offset, li->kind(), true, CHECK);
1949 }
1950 HOTSPOT_JNI_SETOBJECTFIELD_RETURN();
1951 JNI_END
1952
1953 // TODO: make this a template
1954
1955 #define DEFINE_SETFIELD(Argument,Fieldname,Result,SigType,unionType \
1956 , EntryProbe, ReturnProbe) \
1957 \
1958 JNI_ENTRY_NO_PRESERVE(void, jni_Set##Result##Field(JNIEnv *env, jobject obj, jfieldID fieldID, Argument value)) \
1959 \
1960 EntryProbe; \
1961 \
1962 oop o = JNIHandles::resolve_non_null(obj); \
1963 Klass* k = o->klass(); \
1964 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID); \
1965 /* Keep JVMTI addition small and only check enabled flag here. */ \
1966 if (JvmtiExport::should_post_field_modification()) { \
1967 jvalue field_value; \
1968 field_value.unionType = value; \
1969 o = JvmtiExport::jni_SetField_probe(thread, obj, o, k, fieldID, false, SigType, (jvalue *)&field_value); \
1970 } \
1971 o->Fieldname##_field_put(offset, value); \
1972 ReturnProbe; \
1973 JNI_END
1974
1975 DEFINE_SETFIELD(jboolean, bool, Boolean, JVM_SIGNATURE_BOOLEAN, z
1976 , HOTSPOT_JNI_SETBOOLEANFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value),
1977 HOTSPOT_JNI_SETBOOLEANFIELD_RETURN())
1978 DEFINE_SETFIELD(jbyte, byte, Byte, JVM_SIGNATURE_BYTE, b
1979 , HOTSPOT_JNI_SETBYTEFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value),
1980 HOTSPOT_JNI_SETBYTEFIELD_RETURN())
1981 DEFINE_SETFIELD(jchar, char, Char, JVM_SIGNATURE_CHAR, c
1982 , HOTSPOT_JNI_SETCHARFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value),
1983 HOTSPOT_JNI_SETCHARFIELD_RETURN())
1984 DEFINE_SETFIELD(jshort, short, Short, JVM_SIGNATURE_SHORT, s
1985 , HOTSPOT_JNI_SETSHORTFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value),
1986 HOTSPOT_JNI_SETSHORTFIELD_RETURN())
1987 DEFINE_SETFIELD(jint, int, Int, JVM_SIGNATURE_INT, i
1988 , HOTSPOT_JNI_SETINTFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value),
1989 HOTSPOT_JNI_SETINTFIELD_RETURN())
1990 DEFINE_SETFIELD(jlong, long, Long, JVM_SIGNATURE_LONG, j
1991 , HOTSPOT_JNI_SETLONGFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value),
1992 HOTSPOT_JNI_SETLONGFIELD_RETURN())
1993 // Float and double probes don't return value because dtrace doesn't currently support it
1994 DEFINE_SETFIELD(jfloat, float, Float, JVM_SIGNATURE_FLOAT, f
1995 , HOTSPOT_JNI_SETFLOATFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
1996 HOTSPOT_JNI_SETFLOATFIELD_RETURN())
1997 DEFINE_SETFIELD(jdouble, double, Double, JVM_SIGNATURE_DOUBLE, d
1998 , HOTSPOT_JNI_SETDOUBLEFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
1999 HOTSPOT_JNI_SETDOUBLEFIELD_RETURN())
2000
2001 DT_RETURN_MARK_DECL(ToReflectedField, jobject
2002 , HOTSPOT_JNI_TOREFLECTEDFIELD_RETURN(_ret_ref));
2003
2004 JNI_ENTRY(jobject, jni_ToReflectedField(JNIEnv *env, jclass cls, jfieldID fieldID, jboolean isStatic))
2005 HOTSPOT_JNI_TOREFLECTEDFIELD_ENTRY(env, cls, (uintptr_t) fieldID, isStatic);
2006 jobject ret = nullptr;
2007 DT_RETURN_MARK(ToReflectedField, jobject, (const jobject&)ret);
2008
2009 fieldDescriptor fd;
2010 bool found = false;
2011 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2012
2013 assert(jfieldIDWorkaround::is_static_jfieldID(fieldID) == (isStatic != 0), "invalid fieldID");
2014
2015 if (isStatic) {
2016 // Static field. The fieldID a JNIid specifying the field holder and the offset within the Klass*.
2017 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID);
2018 assert(id->is_static_field_id(), "invalid static field id");
2019 found = id->find_local_field(&fd);
2020 } else {
2021 // Non-static field. The fieldID is really the offset of the field within the instanceOop.
2022 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID);
2023 found = InstanceKlass::cast(k)->find_field_from_offset(offset, false, &fd);
2024 }
2025 assert(found, "bad fieldID passed into jni_ToReflectedField");
2026 oop reflected = Reflection::new_field(&fd, CHECK_NULL);
2027 ret = JNIHandles::make_local(THREAD, reflected);
2028 return ret;
2029 JNI_END
2030
2031
2032 //
2033 // Accessing Static Fields
2034 //
2035 DT_RETURN_MARK_DECL(GetStaticFieldID, jfieldID
2036 , HOTSPOT_JNI_GETSTATICFIELDID_RETURN((uintptr_t)_ret_ref));
2037
2038 JNI_ENTRY(jfieldID, jni_GetStaticFieldID(JNIEnv *env, jclass clazz,
2039 const char *name, const char *sig))
2040 HOTSPOT_JNI_GETSTATICFIELDID_ENTRY(env, clazz, (char *) name, (char *) sig);
2041 jfieldID ret = nullptr;
2042 DT_RETURN_MARK(GetStaticFieldID, jfieldID, (const jfieldID&)ret);
2043
2044 // The class should have been loaded (we have an instance of the class
2045 // passed in) so the field and signature should already be in the symbol
2046 // table. If they're not there, the field doesn't exist.
2047 TempNewSymbol fieldname = SymbolTable::probe(name, (int)strlen(name));
2048 TempNewSymbol signame = SymbolTable::probe(sig, (int)strlen(sig));
2049 if (fieldname == nullptr || signame == nullptr) {
2050 THROW_MSG_NULL(vmSymbols::java_lang_NoSuchFieldError(), (char*) name);
2051 }
2052 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz));
2053 // Make sure class is initialized before handing id's out to static fields
2054 k->initialize(CHECK_NULL);
2055
2056 fieldDescriptor fd;
2057 if (!k->is_instance_klass() ||
2058 !InstanceKlass::cast(k)->find_field(fieldname, signame, true, &fd)) {
2059 THROW_MSG_NULL(vmSymbols::java_lang_NoSuchFieldError(), (char*) name);
2060 }
2061
2062 // A jfieldID for a static field is a JNIid specifying the field holder and the offset within the Klass*
2063 JNIid* id = fd.field_holder()->jni_id_for(fd.offset());
2064 DEBUG_ONLY(id->set_is_static_field_id();)
2065
2066 DEBUG_ONLY(id->verify(fd.field_holder()));
2067
2068 ret = jfieldIDWorkaround::to_static_jfieldID(id);
2069 return ret;
2070 JNI_END
2071
2072
2073 JNI_ENTRY(jobject, jni_GetStaticObjectField(JNIEnv *env, jclass clazz, jfieldID fieldID))
2074 HOTSPOT_JNI_GETSTATICOBJECTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID);
2075 #if INCLUDE_JNI_CHECK
2076 DEBUG_ONLY(Klass* param_k = jniCheck::validate_class(thread, clazz);)
2077 #endif // INCLUDE_JNI_CHECK
2078 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID);
2079 assert(id->is_static_field_id(), "invalid static field id");
2080 // Keep JVMTI addition small and only check enabled flag here.
2081 // jni_GetField_probe() assumes that is okay to create handles.
2082 if (JvmtiExport::should_post_field_access()) {
2083 JvmtiExport::jni_GetField_probe(thread, nullptr, nullptr, id->holder(), fieldID, true);
2084 }
2085 jobject ret = JNIHandles::make_local(THREAD, id->holder()->java_mirror()->obj_field(id->offset()));
2086 HOTSPOT_JNI_GETSTATICOBJECTFIELD_RETURN(ret);
2087 return ret;
2088 JNI_END
2089
2090
2091 #define DEFINE_GETSTATICFIELD(Return,Fieldname,Result \
2092 , EntryProbe, ReturnProbe) \
2093 \
2094 DT_RETURN_MARK_DECL_FOR(Result, GetStatic##Result##Field, Return \
2095 , ReturnProbe); \
2096 \
2097 JNI_ENTRY(Return, jni_GetStatic##Result##Field(JNIEnv *env, jclass clazz, jfieldID fieldID)) \
2098 EntryProbe; \
2099 Return ret = 0;\
2100 DT_RETURN_MARK_FOR(Result, GetStatic##Result##Field, Return, \
2101 (const Return&)ret);\
2102 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID); \
2103 assert(id->is_static_field_id(), "invalid static field id"); \
2104 /* Keep JVMTI addition small and only check enabled flag here. */ \
2105 /* jni_GetField_probe() assumes that is okay to create handles. */ \
2106 if (JvmtiExport::should_post_field_access()) { \
2107 JvmtiExport::jni_GetField_probe(thread, nullptr, nullptr, id->holder(), fieldID, true); \
2108 } \
2109 ret = id->holder()->java_mirror()-> Fieldname##_field (id->offset()); \
2110 return ret;\
2111 JNI_END
2112
2113 DEFINE_GETSTATICFIELD(jboolean, bool, Boolean
2114 , HOTSPOT_JNI_GETSTATICBOOLEANFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICBOOLEANFIELD_RETURN(_ret_ref))
2115 DEFINE_GETSTATICFIELD(jbyte, byte, Byte
2116 , HOTSPOT_JNI_GETSTATICBYTEFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICBYTEFIELD_RETURN(_ret_ref) )
2117 DEFINE_GETSTATICFIELD(jchar, char, Char
2118 , HOTSPOT_JNI_GETSTATICCHARFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICCHARFIELD_RETURN(_ret_ref) )
2119 DEFINE_GETSTATICFIELD(jshort, short, Short
2120 , HOTSPOT_JNI_GETSTATICSHORTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICSHORTFIELD_RETURN(_ret_ref) )
2121 DEFINE_GETSTATICFIELD(jint, int, Int
2122 , HOTSPOT_JNI_GETSTATICINTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICINTFIELD_RETURN(_ret_ref) )
2123 DEFINE_GETSTATICFIELD(jlong, long, Long
2124 , HOTSPOT_JNI_GETSTATICLONGFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICLONGFIELD_RETURN(_ret_ref) )
2125 // Float and double probes don't return value because dtrace doesn't currently support it
2126 DEFINE_GETSTATICFIELD(jfloat, float, Float
2127 , HOTSPOT_JNI_GETSTATICFLOATFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICFLOATFIELD_RETURN() )
2128 DEFINE_GETSTATICFIELD(jdouble, double, Double
2129 , HOTSPOT_JNI_GETSTATICDOUBLEFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICDOUBLEFIELD_RETURN() )
2130
2131 JNI_ENTRY(void, jni_SetStaticObjectField(JNIEnv *env, jclass clazz, jfieldID fieldID, jobject value))
2132 HOTSPOT_JNI_SETSTATICOBJECTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value);
2133 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID);
2134 assert(id->is_static_field_id(), "invalid static field id");
2135 // Keep JVMTI addition small and only check enabled flag here.
2136 // jni_SetField_probe() assumes that is okay to create handles.
2137 if (JvmtiExport::should_post_field_modification()) {
2138 jvalue field_value;
2139 field_value.l = value;
2140 JvmtiExport::jni_SetField_probe(thread, nullptr, nullptr, id->holder(), fieldID, true, JVM_SIGNATURE_CLASS, (jvalue *)&field_value);
2141 }
2142 id->holder()->java_mirror()->obj_field_put(id->offset(), JNIHandles::resolve(value));
2143 HOTSPOT_JNI_SETSTATICOBJECTFIELD_RETURN();
2144 JNI_END
2145
2146
2147
2148 #define DEFINE_SETSTATICFIELD(Argument,Fieldname,Result,SigType,unionType \
2149 , EntryProbe, ReturnProbe) \
2150 \
2151 JNI_ENTRY(void, jni_SetStatic##Result##Field(JNIEnv *env, jclass clazz, jfieldID fieldID, Argument value)) \
2152 EntryProbe; \
2153 \
2154 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID); \
2155 assert(id->is_static_field_id(), "invalid static field id"); \
2156 /* Keep JVMTI addition small and only check enabled flag here. */ \
2157 /* jni_SetField_probe() assumes that is okay to create handles. */ \
2158 if (JvmtiExport::should_post_field_modification()) { \
2159 jvalue field_value; \
2160 field_value.unionType = value; \
2161 JvmtiExport::jni_SetField_probe(thread, nullptr, nullptr, id->holder(), fieldID, true, SigType, (jvalue *)&field_value); \
2162 } \
2163 id->holder()->java_mirror()-> Fieldname##_field_put (id->offset(), value); \
2164 ReturnProbe;\
2165 JNI_END
2166
2167 DEFINE_SETSTATICFIELD(jboolean, bool, Boolean, JVM_SIGNATURE_BOOLEAN, z
2168 , HOTSPOT_JNI_SETSTATICBOOLEANFIELD_ENTRY(env, clazz, (uintptr_t)fieldID, value),
2169 HOTSPOT_JNI_SETSTATICBOOLEANFIELD_RETURN())
2170 DEFINE_SETSTATICFIELD(jbyte, byte, Byte, JVM_SIGNATURE_BYTE, b
2171 , HOTSPOT_JNI_SETSTATICBYTEFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value),
2172 HOTSPOT_JNI_SETSTATICBYTEFIELD_RETURN())
2173 DEFINE_SETSTATICFIELD(jchar, char, Char, JVM_SIGNATURE_CHAR, c
2174 , HOTSPOT_JNI_SETSTATICCHARFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value),
2175 HOTSPOT_JNI_SETSTATICCHARFIELD_RETURN())
2176 DEFINE_SETSTATICFIELD(jshort, short, Short, JVM_SIGNATURE_SHORT, s
2177 , HOTSPOT_JNI_SETSTATICSHORTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value),
2178 HOTSPOT_JNI_SETSTATICSHORTFIELD_RETURN())
2179 DEFINE_SETSTATICFIELD(jint, int, Int, JVM_SIGNATURE_INT, i
2180 , HOTSPOT_JNI_SETSTATICINTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value),
2181 HOTSPOT_JNI_SETSTATICINTFIELD_RETURN())
2182 DEFINE_SETSTATICFIELD(jlong, long, Long, JVM_SIGNATURE_LONG, j
2183 , HOTSPOT_JNI_SETSTATICLONGFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value),
2184 HOTSPOT_JNI_SETSTATICLONGFIELD_RETURN())
2185 // Float and double probes don't return value because dtrace doesn't currently support it
2186 DEFINE_SETSTATICFIELD(jfloat, float, Float, JVM_SIGNATURE_FLOAT, f
2187 , HOTSPOT_JNI_SETSTATICFLOATFIELD_ENTRY(env, clazz, (uintptr_t) fieldID),
2188 HOTSPOT_JNI_SETSTATICFLOATFIELD_RETURN())
2189 DEFINE_SETSTATICFIELD(jdouble, double, Double, JVM_SIGNATURE_DOUBLE, d
2190 , HOTSPOT_JNI_SETSTATICDOUBLEFIELD_ENTRY(env, clazz, (uintptr_t) fieldID),
2191 HOTSPOT_JNI_SETSTATICDOUBLEFIELD_RETURN())
2192
2193 //
2194 // String Operations
2195 //
2196
2197 // Unicode Interface
2198
2199 DT_RETURN_MARK_DECL(NewString, jstring
2200 , HOTSPOT_JNI_NEWSTRING_RETURN(_ret_ref));
2201
2202 JNI_ENTRY(jstring, jni_NewString(JNIEnv *env, const jchar *unicodeChars, jsize len))
2203 HOTSPOT_JNI_NEWSTRING_ENTRY(env, (uint16_t *) unicodeChars, len);
2204 jstring ret = nullptr;
2205 DT_RETURN_MARK(NewString, jstring, (const jstring&)ret);
2206 oop string=java_lang_String::create_oop_from_unicode((jchar*) unicodeChars, len, CHECK_NULL);
2207 ret = (jstring) JNIHandles::make_local(THREAD, string);
2208 return ret;
2209 JNI_END
2210
2211
2212 JNI_ENTRY_NO_PRESERVE(jsize, jni_GetStringLength(JNIEnv *env, jstring string))
2213 HOTSPOT_JNI_GETSTRINGLENGTH_ENTRY(env, string);
2214 jsize ret = 0;
2215 oop s = JNIHandles::resolve_non_null(string);
2216 ret = java_lang_String::length(s);
2217 HOTSPOT_JNI_GETSTRINGLENGTH_RETURN(ret);
2218 return ret;
2219 JNI_END
2220
2221
2222 JNI_ENTRY_NO_PRESERVE(const jchar*, jni_GetStringChars(
2223 JNIEnv *env, jstring string, jboolean *isCopy))
2224 HOTSPOT_JNI_GETSTRINGCHARS_ENTRY(env, string, (uintptr_t *) isCopy);
2225 jchar* buf = nullptr;
2226 oop s = JNIHandles::resolve_non_null(string);
2227 typeArrayOop s_value = java_lang_String::value(s);
2228 if (s_value != nullptr) {
2229 int s_len = java_lang_String::length(s, s_value);
2230 bool is_latin1 = java_lang_String::is_latin1(s);
2231 buf = NEW_C_HEAP_ARRAY_RETURN_NULL(jchar, s_len + 1, mtInternal); // add one for zero termination
2232 /* JNI Specification states return null on OOM */
2233 if (buf != nullptr) {
2234 if (s_len > 0) {
2235 if (!is_latin1) {
2236 ArrayAccess<>::arraycopy_to_native(s_value, (size_t) typeArrayOopDesc::element_offset<jchar>(0),
2237 buf, s_len);
2238 } else {
2239 for (int i = 0; i < s_len; i++) {
2240 buf[i] = ((jchar) s_value->byte_at(i)) & 0xff;
2241 }
2242 }
2243 }
2244 buf[s_len] = 0;
2245 //%note jni_5
2246 if (isCopy != nullptr) {
2247 *isCopy = JNI_TRUE;
2248 }
2249 }
2250 }
2251 HOTSPOT_JNI_GETSTRINGCHARS_RETURN(buf);
2252 return buf;
2253 JNI_END
2254
2255
2256 JNI_ENTRY_NO_PRESERVE(void, jni_ReleaseStringChars(JNIEnv *env, jstring str, const jchar *chars))
2257 HOTSPOT_JNI_RELEASESTRINGCHARS_ENTRY(env, str, (uint16_t *) chars);
2258 //%note jni_6
2259 if (chars != nullptr) {
2260 // Since String objects are supposed to be immutable, don't copy any
2261 // new data back. A bad user will have to go after the char array.
2262 FreeHeap((void*) chars);
2263 }
2264 HOTSPOT_JNI_RELEASESTRINGCHARS_RETURN();
2265 JNI_END
2266
2267
2268 // UTF Interface
2269
2270 DT_RETURN_MARK_DECL(NewStringUTF, jstring
2271 , HOTSPOT_JNI_NEWSTRINGUTF_RETURN(_ret_ref));
2272
2273 JNI_ENTRY(jstring, jni_NewStringUTF(JNIEnv *env, const char *bytes))
2274 HOTSPOT_JNI_NEWSTRINGUTF_ENTRY(env, (char *) bytes);
2275 jstring ret;
2276 DT_RETURN_MARK(NewStringUTF, jstring, (const jstring&)ret);
2277
2278 oop result = java_lang_String::create_oop_from_str((char*) bytes, CHECK_NULL);
2279 ret = (jstring) JNIHandles::make_local(THREAD, result);
2280 return ret;
2281 JNI_END
2282
2283
2284 JNI_ENTRY(jsize, jni_GetStringUTFLength(JNIEnv *env, jstring string))
2285 HOTSPOT_JNI_GETSTRINGUTFLENGTH_ENTRY(env, string);
2286 oop java_string = JNIHandles::resolve_non_null(string);
2287 jsize ret = java_lang_String::utf8_length_as_int(java_string);
2288 HOTSPOT_JNI_GETSTRINGUTFLENGTH_RETURN(ret);
2289 return ret;
2290 JNI_END
2291
2292 JNI_ENTRY(jlong, jni_GetStringUTFLengthAsLong(JNIEnv *env, jstring string))
2293 HOTSPOT_JNI_GETSTRINGUTFLENGTHASLONG_ENTRY(env, string);
2294 oop java_string = JNIHandles::resolve_non_null(string);
2295 size_t ret = java_lang_String::utf8_length(java_string);
2296 HOTSPOT_JNI_GETSTRINGUTFLENGTHASLONG_RETURN(ret);
2297 return checked_cast<jlong>(ret);
2298 JNI_END
2299
2300
2301 JNI_ENTRY(const char*, jni_GetStringUTFChars(JNIEnv *env, jstring string, jboolean *isCopy))
2302 HOTSPOT_JNI_GETSTRINGUTFCHARS_ENTRY(env, string, (uintptr_t *) isCopy);
2303 char* result = nullptr;
2304 oop java_string = JNIHandles::resolve_non_null(string);
2305 typeArrayOop s_value = java_lang_String::value(java_string);
2306 if (s_value != nullptr) {
2307 size_t length = java_lang_String::utf8_length(java_string, s_value);
2308 // JNI Specification states return null on OOM.
2309 // The resulting sequence doesn't have to be NUL-terminated but we do.
2310 result = AllocateHeap(length + 1, mtInternal, AllocFailStrategy::RETURN_NULL);
2311 if (result != nullptr) {
2312 java_lang_String::as_utf8_string(java_string, s_value, result, length + 1);
2313 if (isCopy != nullptr) {
2314 *isCopy = JNI_TRUE;
2315 }
2316 }
2317 }
2318 HOTSPOT_JNI_GETSTRINGUTFCHARS_RETURN(result);
2319 return result;
2320 JNI_END
2321
2322
2323 JNI_LEAF(void, jni_ReleaseStringUTFChars(JNIEnv *env, jstring str, const char *chars))
2324 HOTSPOT_JNI_RELEASESTRINGUTFCHARS_ENTRY(env, str, (char *) chars);
2325 if (chars != nullptr) {
2326 FreeHeap((char*) chars);
2327 }
2328 HOTSPOT_JNI_RELEASESTRINGUTFCHARS_RETURN();
2329 JNI_END
2330
2331
2332 JNI_ENTRY_NO_PRESERVE(jsize, jni_GetArrayLength(JNIEnv *env, jarray array))
2333 HOTSPOT_JNI_GETARRAYLENGTH_ENTRY(env, array);
2334 arrayOop a = arrayOop(JNIHandles::resolve_non_null(array));
2335 assert(a->is_array(), "must be array");
2336 jsize ret = a->length();
2337 HOTSPOT_JNI_GETARRAYLENGTH_RETURN(ret);
2338 return ret;
2339 JNI_END
2340
2341
2342 //
2343 // Object Array Operations
2344 //
2345
2346 DT_RETURN_MARK_DECL(NewObjectArray, jobjectArray
2347 , HOTSPOT_JNI_NEWOBJECTARRAY_RETURN(_ret_ref));
2348
2349 JNI_ENTRY(jobjectArray, jni_NewObjectArray(JNIEnv *env, jsize length, jclass elementClass, jobject initialElement))
2350 HOTSPOT_JNI_NEWOBJECTARRAY_ENTRY(env, length, elementClass, initialElement);
2351 jobjectArray ret = nullptr;
2352 DT_RETURN_MARK(NewObjectArray, jobjectArray, (const jobjectArray&)ret);
2353 Klass* ek = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(elementClass));
2354
2355 // Make sure bottom_klass is initialized.
2356 ek->initialize(CHECK_NULL);
2357 objArrayOop result = oopFactory::new_objArray(ek, length, CHECK_NULL);
2358
2359 oop initial_value = JNIHandles::resolve(initialElement);
2360 if (initial_value != nullptr) { // array already initialized with null
2361 for (int index = 0; index < length; index++) {
2362 result->obj_at_put(index, initial_value);
2363 }
2364 }
2365 ret = (jobjectArray) JNIHandles::make_local(THREAD, result);
2366 return ret;
2367 JNI_END
2368
2369 DT_RETURN_MARK_DECL(GetObjectArrayElement, jobject
2370 , HOTSPOT_JNI_GETOBJECTARRAYELEMENT_RETURN(_ret_ref));
2371
2372 JNI_ENTRY(jobject, jni_GetObjectArrayElement(JNIEnv *env, jobjectArray array, jsize index))
2373 HOTSPOT_JNI_GETOBJECTARRAYELEMENT_ENTRY(env, array, index);
2374 jobject ret = nullptr;
2375 DT_RETURN_MARK(GetObjectArrayElement, jobject, (const jobject&)ret);
2376 objArrayOop a = objArrayOop(JNIHandles::resolve_non_null(array));
2377 if (a->is_within_bounds(index)) {
2378 oop res = a->obj_at(index, CHECK_NULL);
2379 assert(res != nullptr || !a->is_null_free_array(), "Invalid value");
2380 ret = JNIHandles::make_local(THREAD, res);
2381 return ret;
2382 } else {
2383 ResourceMark rm(THREAD);
2384 stringStream ss;
2385 ss.print("Index %d out of bounds for length %d", index, a->length());
2386 THROW_MSG_NULL(vmSymbols::java_lang_ArrayIndexOutOfBoundsException(), ss.as_string());
2387 }
2388 JNI_END
2389
2390 DT_VOID_RETURN_MARK_DECL(SetObjectArrayElement
2391 , HOTSPOT_JNI_SETOBJECTARRAYELEMENT_RETURN());
2392
2393 JNI_ENTRY(void, jni_SetObjectArrayElement(JNIEnv *env, jobjectArray array, jsize index, jobject value))
2394 HOTSPOT_JNI_SETOBJECTARRAYELEMENT_ENTRY(env, array, index, value);
2395 DT_VOID_RETURN_MARK(SetObjectArrayElement);
2396
2397 objArrayOop a = objArrayOop(JNIHandles::resolve_non_null(array));
2398 oop v = JNIHandles::resolve(value);
2399 if (a->is_within_bounds(index)) {
2400 Klass* ek = a->is_flatArray() ? FlatArrayKlass::cast(a->klass())->element_klass() : RefArrayKlass::cast(a->klass())->element_klass();
2401 if (v == nullptr || v->is_a(ek)) {
2402 a->obj_at_put(index, v, CHECK);
2403 } else {
2404 ResourceMark rm(THREAD);
2405 stringStream ss;
2406 Klass *bottom_kl = ObjArrayKlass::cast(a->klass())->bottom_klass();
2407 ss.print("type mismatch: can not store %s to %s[%d]",
2408 v->klass()->external_name(),
2409 bottom_kl->is_typeArray_klass() ? type2name_tab[ArrayKlass::cast(bottom_kl)->element_type()] : bottom_kl->external_name(),
2410 index);
2411 for (int dims = ArrayKlass::cast(a->klass())->dimension(); dims > 1; --dims) {
2412 ss.print("[]");
2413 }
2414 THROW_MSG(vmSymbols::java_lang_ArrayStoreException(), ss.as_string());
2415 }
2416 } else {
2417 ResourceMark rm(THREAD);
2418 stringStream ss;
2419 ss.print("Index %d out of bounds for length %d", index, a->length());
2420 THROW_MSG(vmSymbols::java_lang_ArrayIndexOutOfBoundsException(), ss.as_string());
2421 }
2422 JNI_END
2423
2424
2425
2426 #define DEFINE_NEWSCALARARRAY(Return,Allocator,Result \
2427 ,EntryProbe,ReturnProbe) \
2428 \
2429 DT_RETURN_MARK_DECL(New##Result##Array, Return \
2430 , ReturnProbe); \
2431 \
2432 JNI_ENTRY(Return, \
2433 jni_New##Result##Array(JNIEnv *env, jsize len)) \
2434 EntryProbe; \
2435 Return ret = nullptr;\
2436 DT_RETURN_MARK(New##Result##Array, Return, (const Return&)ret);\
2437 \
2438 oop obj= oopFactory::Allocator(len, CHECK_NULL); \
2439 ret = (Return) JNIHandles::make_local(THREAD, obj); \
2440 return ret;\
2441 JNI_END
2442
2443 DEFINE_NEWSCALARARRAY(jbooleanArray, new_boolArray, Boolean,
2444 HOTSPOT_JNI_NEWBOOLEANARRAY_ENTRY(env, len),
2445 HOTSPOT_JNI_NEWBOOLEANARRAY_RETURN(_ret_ref))
2446 DEFINE_NEWSCALARARRAY(jbyteArray, new_byteArray, Byte,
2447 HOTSPOT_JNI_NEWBYTEARRAY_ENTRY(env, len),
2448 HOTSPOT_JNI_NEWBYTEARRAY_RETURN(_ret_ref))
2449 DEFINE_NEWSCALARARRAY(jshortArray, new_shortArray, Short,
2450 HOTSPOT_JNI_NEWSHORTARRAY_ENTRY(env, len),
2451 HOTSPOT_JNI_NEWSHORTARRAY_RETURN(_ret_ref))
2452 DEFINE_NEWSCALARARRAY(jcharArray, new_charArray, Char,
2453 HOTSPOT_JNI_NEWCHARARRAY_ENTRY(env, len),
2454 HOTSPOT_JNI_NEWCHARARRAY_RETURN(_ret_ref))
2455 DEFINE_NEWSCALARARRAY(jintArray, new_intArray, Int,
2456 HOTSPOT_JNI_NEWINTARRAY_ENTRY(env, len),
2457 HOTSPOT_JNI_NEWINTARRAY_RETURN(_ret_ref))
2458 DEFINE_NEWSCALARARRAY(jlongArray, new_longArray, Long,
2459 HOTSPOT_JNI_NEWLONGARRAY_ENTRY(env, len),
2460 HOTSPOT_JNI_NEWLONGARRAY_RETURN(_ret_ref))
2461 DEFINE_NEWSCALARARRAY(jfloatArray, new_floatArray, Float,
2462 HOTSPOT_JNI_NEWFLOATARRAY_ENTRY(env, len),
2463 HOTSPOT_JNI_NEWFLOATARRAY_RETURN(_ret_ref))
2464 DEFINE_NEWSCALARARRAY(jdoubleArray, new_doubleArray, Double,
2465 HOTSPOT_JNI_NEWDOUBLEARRAY_ENTRY(env, len),
2466 HOTSPOT_JNI_NEWDOUBLEARRAY_RETURN(_ret_ref))
2467
2468 // Return an address which will fault if the caller writes to it.
2469
2470 static char* get_bad_address() {
2471 static char* bad_address = nullptr;
2472 if (bad_address == nullptr) {
2473 size_t size = os::vm_allocation_granularity();
2474 bad_address = os::reserve_memory(size, mtInternal);
2475 if (bad_address != nullptr) {
2476 os::protect_memory(bad_address, size, os::MEM_PROT_READ,
2477 /*is_committed*/false);
2478 }
2479 }
2480 return bad_address;
2481 }
2482
2483
2484
2485 #define DEFINE_GETSCALARARRAYELEMENTS(ElementType,Result \
2486 , EntryProbe, ReturnProbe) \
2487 \
2488 JNI_ENTRY_NO_PRESERVE(ElementType*, \
2489 jni_Get##Result##ArrayElements(JNIEnv *env, ElementType##Array array, jboolean *isCopy)) \
2490 EntryProbe; \
2491 /* allocate an chunk of memory in c land */ \
2492 typeArrayOop a = typeArrayOop(JNIHandles::resolve_non_null(array)); \
2493 ElementType* result; \
2494 int len = a->length(); \
2495 if (len == 0) { \
2496 if (isCopy != nullptr) { \
2497 *isCopy = JNI_FALSE; \
2498 } \
2499 /* Empty array: legal but useless, can't return null. \
2500 * Return a pointer to something useless. \
2501 * Avoid asserts in typeArrayOop. */ \
2502 result = (ElementType*)get_bad_address(); \
2503 } else { \
2504 /* JNI Specification states return null on OOM */ \
2505 result = NEW_C_HEAP_ARRAY_RETURN_NULL(ElementType, len, mtInternal); \
2506 if (result != nullptr) { \
2507 /* copy the array to the c chunk */ \
2508 ArrayAccess<>::arraycopy_to_native(a, typeArrayOopDesc::element_offset<ElementType>(0), \
2509 result, len); \
2510 if (isCopy) { \
2511 *isCopy = JNI_TRUE; \
2512 } \
2513 } \
2514 } \
2515 ReturnProbe; \
2516 return result; \
2517 JNI_END
2518
2519 DEFINE_GETSCALARARRAYELEMENTS(jboolean, Boolean
2520 , HOTSPOT_JNI_GETBOOLEANARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy),
2521 HOTSPOT_JNI_GETBOOLEANARRAYELEMENTS_RETURN((uintptr_t*)result))
2522 DEFINE_GETSCALARARRAYELEMENTS(jbyte, Byte
2523 , HOTSPOT_JNI_GETBYTEARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy),
2524 HOTSPOT_JNI_GETBYTEARRAYELEMENTS_RETURN((char*)result))
2525 DEFINE_GETSCALARARRAYELEMENTS(jshort, Short
2526 , HOTSPOT_JNI_GETSHORTARRAYELEMENTS_ENTRY(env, (uint16_t*) array, (uintptr_t *) isCopy),
2527 HOTSPOT_JNI_GETSHORTARRAYELEMENTS_RETURN((uint16_t*)result))
2528 DEFINE_GETSCALARARRAYELEMENTS(jchar, Char
2529 , HOTSPOT_JNI_GETCHARARRAYELEMENTS_ENTRY(env, (uint16_t*) array, (uintptr_t *) isCopy),
2530 HOTSPOT_JNI_GETCHARARRAYELEMENTS_RETURN(result))
2531 DEFINE_GETSCALARARRAYELEMENTS(jint, Int
2532 , HOTSPOT_JNI_GETINTARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy),
2533 HOTSPOT_JNI_GETINTARRAYELEMENTS_RETURN((uint32_t*)result))
2534 DEFINE_GETSCALARARRAYELEMENTS(jlong, Long
2535 , HOTSPOT_JNI_GETLONGARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy),
2536 HOTSPOT_JNI_GETLONGARRAYELEMENTS_RETURN(((uintptr_t*)result)))
2537 // Float and double probes don't return value because dtrace doesn't currently support it
2538 DEFINE_GETSCALARARRAYELEMENTS(jfloat, Float
2539 , HOTSPOT_JNI_GETFLOATARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy),
2540 HOTSPOT_JNI_GETFLOATARRAYELEMENTS_RETURN(result))
2541 DEFINE_GETSCALARARRAYELEMENTS(jdouble, Double
2542 , HOTSPOT_JNI_GETDOUBLEARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy),
2543 HOTSPOT_JNI_GETDOUBLEARRAYELEMENTS_RETURN(result))
2544
2545
2546 #define DEFINE_RELEASESCALARARRAYELEMENTS(ElementType,Result \
2547 , EntryProbe, ReturnProbe) \
2548 \
2549 JNI_ENTRY_NO_PRESERVE(void, \
2550 jni_Release##Result##ArrayElements(JNIEnv *env, ElementType##Array array, \
2551 ElementType *buf, jint mode)) \
2552 EntryProbe; \
2553 typeArrayOop a = typeArrayOop(JNIHandles::resolve_non_null(array)); \
2554 int len = a->length(); \
2555 if (len != 0) { /* Empty array: nothing to free or copy. */ \
2556 if ((mode == 0) || (mode == JNI_COMMIT)) { \
2557 ArrayAccess<>::arraycopy_from_native(buf, a, typeArrayOopDesc::element_offset<ElementType>(0), len); \
2558 } \
2559 if ((mode == 0) || (mode == JNI_ABORT)) { \
2560 FreeHeap(buf); \
2561 } \
2562 } \
2563 ReturnProbe; \
2564 JNI_END
2565
2566 DEFINE_RELEASESCALARARRAYELEMENTS(jboolean, Boolean
2567 , HOTSPOT_JNI_RELEASEBOOLEANARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) buf, mode),
2568 HOTSPOT_JNI_RELEASEBOOLEANARRAYELEMENTS_RETURN())
2569 DEFINE_RELEASESCALARARRAYELEMENTS(jbyte, Byte
2570 , HOTSPOT_JNI_RELEASEBYTEARRAYELEMENTS_ENTRY(env, array, (char *) buf, mode),
2571 HOTSPOT_JNI_RELEASEBYTEARRAYELEMENTS_RETURN())
2572 DEFINE_RELEASESCALARARRAYELEMENTS(jshort, Short
2573 , HOTSPOT_JNI_RELEASESHORTARRAYELEMENTS_ENTRY(env, array, (uint16_t *) buf, mode),
2574 HOTSPOT_JNI_RELEASESHORTARRAYELEMENTS_RETURN())
2575 DEFINE_RELEASESCALARARRAYELEMENTS(jchar, Char
2576 , HOTSPOT_JNI_RELEASECHARARRAYELEMENTS_ENTRY(env, array, (uint16_t *) buf, mode),
2577 HOTSPOT_JNI_RELEASECHARARRAYELEMENTS_RETURN())
2578 DEFINE_RELEASESCALARARRAYELEMENTS(jint, Int
2579 , HOTSPOT_JNI_RELEASEINTARRAYELEMENTS_ENTRY(env, array, (uint32_t *) buf, mode),
2580 HOTSPOT_JNI_RELEASEINTARRAYELEMENTS_RETURN())
2581 DEFINE_RELEASESCALARARRAYELEMENTS(jlong, Long
2582 , HOTSPOT_JNI_RELEASELONGARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) buf, mode),
2583 HOTSPOT_JNI_RELEASELONGARRAYELEMENTS_RETURN())
2584 DEFINE_RELEASESCALARARRAYELEMENTS(jfloat, Float
2585 , HOTSPOT_JNI_RELEASEFLOATARRAYELEMENTS_ENTRY(env, array, (float *) buf, mode),
2586 HOTSPOT_JNI_RELEASEFLOATARRAYELEMENTS_RETURN())
2587 DEFINE_RELEASESCALARARRAYELEMENTS(jdouble, Double
2588 , HOTSPOT_JNI_RELEASEDOUBLEARRAYELEMENTS_ENTRY(env, array, (double *) buf, mode),
2589 HOTSPOT_JNI_RELEASEDOUBLEARRAYELEMENTS_RETURN())
2590
2591 static void check_bounds(jsize start, jsize copy_len, jsize array_len, TRAPS) {
2592 ResourceMark rm(THREAD);
2593 if (copy_len < 0) {
2594 stringStream ss;
2595 ss.print("Length %d is negative", copy_len);
2596 THROW_MSG(vmSymbols::java_lang_ArrayIndexOutOfBoundsException(), ss.as_string());
2597 } else if (start < 0 || (start > array_len - copy_len)) {
2598 stringStream ss;
2599 ss.print("Array region %d.." INT64_FORMAT " out of bounds for length %d",
2600 start, (int64_t)start+(int64_t)copy_len, array_len);
2601 THROW_MSG(vmSymbols::java_lang_ArrayIndexOutOfBoundsException(), ss.as_string());
2602 }
2603 }
2604
2605 #define DEFINE_GETSCALARARRAYREGION(ElementType,Result \
2606 , EntryProbe, ReturnProbe) \
2607 DT_VOID_RETURN_MARK_DECL(Get##Result##ArrayRegion \
2608 , ReturnProbe); \
2609 \
2610 JNI_ENTRY(void, \
2611 jni_Get##Result##ArrayRegion(JNIEnv *env, ElementType##Array array, jsize start, \
2612 jsize len, ElementType *buf)) \
2613 EntryProbe; \
2614 DT_VOID_RETURN_MARK(Get##Result##ArrayRegion); \
2615 typeArrayOop src = typeArrayOop(JNIHandles::resolve_non_null(array)); \
2616 check_bounds(start, len, src->length(), CHECK); \
2617 if (len > 0) { \
2618 ArrayAccess<>::arraycopy_to_native(src, typeArrayOopDesc::element_offset<ElementType>(start), buf, len); \
2619 } \
2620 JNI_END
2621
2622 DEFINE_GETSCALARARRAYREGION(jboolean,Boolean
2623 , HOTSPOT_JNI_GETBOOLEANARRAYREGION_ENTRY(env, array, start, len, (uintptr_t *) buf),
2624 HOTSPOT_JNI_GETBOOLEANARRAYREGION_RETURN());
2625 DEFINE_GETSCALARARRAYREGION(jbyte, Byte
2626 , HOTSPOT_JNI_GETBYTEARRAYREGION_ENTRY(env, array, start, len, (char *) buf),
2627 HOTSPOT_JNI_GETBYTEARRAYREGION_RETURN());
2628 DEFINE_GETSCALARARRAYREGION(jshort, Short
2629 , HOTSPOT_JNI_GETSHORTARRAYREGION_ENTRY(env, array, start, len, (uint16_t *) buf),
2630 HOTSPOT_JNI_GETSHORTARRAYREGION_RETURN());
2631 DEFINE_GETSCALARARRAYREGION(jchar, Char
2632 , HOTSPOT_JNI_GETCHARARRAYREGION_ENTRY(env, array, start, len, (uint16_t*) buf),
2633 HOTSPOT_JNI_GETCHARARRAYREGION_RETURN());
2634 DEFINE_GETSCALARARRAYREGION(jint, Int
2635 , HOTSPOT_JNI_GETINTARRAYREGION_ENTRY(env, array, start, len, (uint32_t*) buf),
2636 HOTSPOT_JNI_GETINTARRAYREGION_RETURN());
2637 DEFINE_GETSCALARARRAYREGION(jlong, Long
2638 , HOTSPOT_JNI_GETLONGARRAYREGION_ENTRY(env, array, start, len, (uintptr_t *) buf),
2639 HOTSPOT_JNI_GETLONGARRAYREGION_RETURN());
2640 DEFINE_GETSCALARARRAYREGION(jfloat, Float
2641 , HOTSPOT_JNI_GETFLOATARRAYREGION_ENTRY(env, array, start, len, (float *) buf),
2642 HOTSPOT_JNI_GETFLOATARRAYREGION_RETURN());
2643 DEFINE_GETSCALARARRAYREGION(jdouble, Double
2644 , HOTSPOT_JNI_GETDOUBLEARRAYREGION_ENTRY(env, array, start, len, (double *) buf),
2645 HOTSPOT_JNI_GETDOUBLEARRAYREGION_RETURN());
2646
2647
2648 #define DEFINE_SETSCALARARRAYREGION(ElementType,Result \
2649 , EntryProbe, ReturnProbe) \
2650 DT_VOID_RETURN_MARK_DECL(Set##Result##ArrayRegion \
2651 ,ReturnProbe); \
2652 \
2653 JNI_ENTRY(void, \
2654 jni_Set##Result##ArrayRegion(JNIEnv *env, ElementType##Array array, jsize start, \
2655 jsize len, const ElementType *buf)) \
2656 EntryProbe; \
2657 DT_VOID_RETURN_MARK(Set##Result##ArrayRegion); \
2658 typeArrayOop dst = typeArrayOop(JNIHandles::resolve_non_null(array)); \
2659 check_bounds(start, len, dst->length(), CHECK); \
2660 if (len > 0) { \
2661 ArrayAccess<>::arraycopy_from_native(buf, dst, typeArrayOopDesc::element_offset<ElementType>(start), len); \
2662 } \
2663 JNI_END
2664
2665 DEFINE_SETSCALARARRAYREGION(jboolean, Boolean
2666 , HOTSPOT_JNI_SETBOOLEANARRAYREGION_ENTRY(env, array, start, len, (uintptr_t *)buf),
2667 HOTSPOT_JNI_SETBOOLEANARRAYREGION_RETURN())
2668 DEFINE_SETSCALARARRAYREGION(jbyte, Byte
2669 , HOTSPOT_JNI_SETBYTEARRAYREGION_ENTRY(env, array, start, len, (char *) buf),
2670 HOTSPOT_JNI_SETBYTEARRAYREGION_RETURN())
2671 DEFINE_SETSCALARARRAYREGION(jshort, Short
2672 , HOTSPOT_JNI_SETSHORTARRAYREGION_ENTRY(env, array, start, len, (uint16_t *) buf),
2673 HOTSPOT_JNI_SETSHORTARRAYREGION_RETURN())
2674 DEFINE_SETSCALARARRAYREGION(jchar, Char
2675 , HOTSPOT_JNI_SETCHARARRAYREGION_ENTRY(env, array, start, len, (uint16_t *) buf),
2676 HOTSPOT_JNI_SETCHARARRAYREGION_RETURN())
2677 DEFINE_SETSCALARARRAYREGION(jint, Int
2678 , HOTSPOT_JNI_SETINTARRAYREGION_ENTRY(env, array, start, len, (uint32_t *) buf),
2679 HOTSPOT_JNI_SETINTARRAYREGION_RETURN())
2680 DEFINE_SETSCALARARRAYREGION(jlong, Long
2681 , HOTSPOT_JNI_SETLONGARRAYREGION_ENTRY(env, array, start, len, (uintptr_t *) buf),
2682 HOTSPOT_JNI_SETLONGARRAYREGION_RETURN())
2683 DEFINE_SETSCALARARRAYREGION(jfloat, Float
2684 , HOTSPOT_JNI_SETFLOATARRAYREGION_ENTRY(env, array, start, len, (float *) buf),
2685 HOTSPOT_JNI_SETFLOATARRAYREGION_RETURN())
2686 DEFINE_SETSCALARARRAYREGION(jdouble, Double
2687 , HOTSPOT_JNI_SETDOUBLEARRAYREGION_ENTRY(env, array, start, len, (double *) buf),
2688 HOTSPOT_JNI_SETDOUBLEARRAYREGION_RETURN())
2689
2690
2691 DT_RETURN_MARK_DECL(RegisterNatives, jint
2692 , HOTSPOT_JNI_REGISTERNATIVES_RETURN(_ret_ref));
2693
2694 JNI_ENTRY(jint, jni_RegisterNatives(JNIEnv *env, jclass clazz,
2695 const JNINativeMethod *methods,
2696 jint nMethods))
2697 HOTSPOT_JNI_REGISTERNATIVES_ENTRY(env, clazz, (void *) methods, nMethods);
2698 jint ret = 0;
2699 DT_RETURN_MARK(RegisterNatives, jint, (const jint&)ret);
2700
2701 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz));
2702
2703 // There are no restrictions on native code registering native methods,
2704 // which allows agents to redefine the bindings to native methods, however
2705 // we issue a warning if any code running outside of the boot/platform
2706 // loader is rebinding any native methods in classes loaded by the
2707 // boot/platform loader that are in named modules. That will catch changes
2708 // to platform classes while excluding classes added to the bootclasspath.
2709 bool do_warning = false;
2710
2711 // Only instanceKlasses can have native methods
2712 if (k->is_instance_klass()) {
2713 oop cl = k->class_loader();
2714 InstanceKlass* ik = InstanceKlass::cast(k);
2715 // Check for a platform class
2716 if ((cl == nullptr || SystemDictionary::is_platform_class_loader(cl)) &&
2717 ik->module()->is_named()) {
2718 Klass* caller = thread->security_get_caller_class(1);
2719 // If no caller class, or caller class has a different loader, then
2720 // issue a warning below.
2721 do_warning = (caller == nullptr) || caller->class_loader() != cl;
2722 }
2723 }
2724
2725
2726 for (int index = 0; index < nMethods; index++) {
2727 const char* meth_name = methods[index].name;
2728 const char* meth_sig = methods[index].signature;
2729 int meth_name_len = (int)strlen(meth_name);
2730
2731 // The class should have been loaded (we have an instance of the class
2732 // passed in) so the method and signature should already be in the symbol
2733 // table. If they're not there, the method doesn't exist.
2734 TempNewSymbol name = SymbolTable::probe(meth_name, meth_name_len);
2735 TempNewSymbol signature = SymbolTable::probe(meth_sig, (int)strlen(meth_sig));
2736
2737 if (name == nullptr || signature == nullptr) {
2738 ResourceMark rm(THREAD);
2739 stringStream st;
2740 st.print("Method %s.%s%s not found", k->external_name(), meth_name, meth_sig);
2741 // Must return negative value on failure
2742 THROW_MSG_(vmSymbols::java_lang_NoSuchMethodError(), st.as_string(), -1);
2743 }
2744
2745 if (do_warning) {
2746 ResourceMark rm(THREAD);
2747 log_warning(jni, resolve)("Re-registering of platform native method: %s.%s%s "
2748 "from code in a different classloader", k->external_name(), meth_name, meth_sig);
2749 }
2750
2751 bool res = Method::register_native(k, name, signature,
2752 (address) methods[index].fnPtr, THREAD);
2753 if (!res) {
2754 ret = -1;
2755 break;
2756 }
2757 }
2758 return ret;
2759 JNI_END
2760
2761
2762 JNI_ENTRY(jint, jni_UnregisterNatives(JNIEnv *env, jclass clazz))
2763 HOTSPOT_JNI_UNREGISTERNATIVES_ENTRY(env, clazz);
2764 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz));
2765 //%note jni_2
2766 if (k->is_instance_klass()) {
2767 for (int index = 0; index < InstanceKlass::cast(k)->methods()->length(); index++) {
2768 Method* m = InstanceKlass::cast(k)->methods()->at(index);
2769 if (m->is_native()) {
2770 m->clear_native_function();
2771 m->set_signature_handler(nullptr);
2772 }
2773 }
2774 }
2775 HOTSPOT_JNI_UNREGISTERNATIVES_RETURN(0);
2776 return 0;
2777 JNI_END
2778
2779 //
2780 // Monitor functions
2781 //
2782
2783 DT_RETURN_MARK_DECL(MonitorEnter, jint
2784 , HOTSPOT_JNI_MONITORENTER_RETURN(_ret_ref));
2785
2786 JNI_ENTRY(jint, jni_MonitorEnter(JNIEnv *env, jobject jobj))
2787 HOTSPOT_JNI_MONITORENTER_ENTRY(env, jobj);
2788 jint ret = JNI_ERR;
2789 DT_RETURN_MARK(MonitorEnter, jint, (const jint&)ret);
2790
2791 // If the object is null, we can't do anything with it
2792 if (jobj == nullptr) {
2793 THROW_(vmSymbols::java_lang_NullPointerException(), JNI_ERR);
2794 }
2795
2796 Handle obj(thread, JNIHandles::resolve_non_null(jobj));
2797 ObjectSynchronizer::jni_enter(obj, CHECK_(JNI_ERR));
2798 return JNI_OK;
2799 JNI_END
2800
2801 DT_RETURN_MARK_DECL(MonitorExit, jint
2802 , HOTSPOT_JNI_MONITOREXIT_RETURN(_ret_ref));
2803
2804 JNI_ENTRY(jint, jni_MonitorExit(JNIEnv *env, jobject jobj))
2805 HOTSPOT_JNI_MONITOREXIT_ENTRY(env, jobj);
2806 jint ret = JNI_ERR;
2807 DT_RETURN_MARK(MonitorExit, jint, (const jint&)ret);
2808
2809 // Don't do anything with a null object
2810 if (jobj == nullptr) {
2811 THROW_(vmSymbols::java_lang_NullPointerException(), JNI_ERR);
2812 }
2813
2814 Handle obj(THREAD, JNIHandles::resolve_non_null(jobj));
2815 ObjectSynchronizer::jni_exit(obj(), CHECK_(JNI_ERR));
2816 return JNI_OK;
2817 JNI_END
2818
2819 //
2820 // Extensions
2821 //
2822
2823 DT_VOID_RETURN_MARK_DECL(GetStringRegion
2824 , HOTSPOT_JNI_GETSTRINGREGION_RETURN());
2825
2826 JNI_ENTRY(void, jni_GetStringRegion(JNIEnv *env, jstring string, jsize start, jsize len, jchar *buf))
2827 HOTSPOT_JNI_GETSTRINGREGION_ENTRY(env, string, start, len, buf);
2828 DT_VOID_RETURN_MARK(GetStringRegion);
2829 oop s = JNIHandles::resolve_non_null(string);
2830 typeArrayOop s_value = java_lang_String::value(s);
2831 int s_len = java_lang_String::length(s, s_value);
2832 if (start < 0 || len < 0 || start > s_len - len) {
2833 THROW(vmSymbols::java_lang_StringIndexOutOfBoundsException());
2834 } else {
2835 if (len > 0) {
2836 bool is_latin1 = java_lang_String::is_latin1(s);
2837 if (!is_latin1) {
2838 ArrayAccess<>::arraycopy_to_native(s_value, typeArrayOopDesc::element_offset<jchar>(start),
2839 buf, len);
2840 } else {
2841 for (int i = 0; i < len; i++) {
2842 buf[i] = ((jchar) s_value->byte_at(i + start)) & 0xff;
2843 }
2844 }
2845 }
2846 }
2847 JNI_END
2848
2849 DT_VOID_RETURN_MARK_DECL(GetStringUTFRegion
2850 , HOTSPOT_JNI_GETSTRINGUTFREGION_RETURN());
2851
2852 JNI_ENTRY(void, jni_GetStringUTFRegion(JNIEnv *env, jstring string, jsize start, jsize len, char *buf))
2853 HOTSPOT_JNI_GETSTRINGUTFREGION_ENTRY(env, string, start, len, buf);
2854 DT_VOID_RETURN_MARK(GetStringUTFRegion);
2855 oop s = JNIHandles::resolve_non_null(string);
2856 typeArrayOop s_value = java_lang_String::value(s);
2857 int s_len = java_lang_String::length(s, s_value);
2858 if (start < 0 || len < 0 || start > s_len - len) {
2859 THROW(vmSymbols::java_lang_StringIndexOutOfBoundsException());
2860 } else {
2861 //%note jni_7
2862 if (len > 0) {
2863 // Assume the buffer is large enough as the JNI spec. does not require user error checking
2864 java_lang_String::as_utf8_string(s, s_value, start, len, buf, INT_MAX);
2865 // as_utf8_string null-terminates the result string
2866 } else {
2867 // JDK null-terminates the buffer even in len is zero
2868 if (buf != nullptr) {
2869 buf[0] = 0;
2870 }
2871 }
2872 }
2873 JNI_END
2874
2875 JNI_ENTRY(void*, jni_GetPrimitiveArrayCritical(JNIEnv *env, jarray array, jboolean *isCopy))
2876 HOTSPOT_JNI_GETPRIMITIVEARRAYCRITICAL_ENTRY(env, array, (uintptr_t *) isCopy);
2877 Handle a(thread, JNIHandles::resolve_non_null(array));
2878 assert(a->is_typeArray(), "just checking");
2879
2880 // Pin object
2881 Universe::heap()->pin_object(thread, a());
2882
2883 BasicType type = TypeArrayKlass::cast(a->klass())->element_type();
2884 void* ret = arrayOop(a())->base(type);
2885 if (isCopy != nullptr) {
2886 *isCopy = JNI_FALSE;
2887 }
2888 HOTSPOT_JNI_GETPRIMITIVEARRAYCRITICAL_RETURN(ret);
2889 return ret;
2890 JNI_END
2891
2892
2893 JNI_ENTRY(void, jni_ReleasePrimitiveArrayCritical(JNIEnv *env, jarray array, void *carray, jint mode))
2894 HOTSPOT_JNI_RELEASEPRIMITIVEARRAYCRITICAL_ENTRY(env, array, carray, mode);
2895 // Unpin object
2896 Universe::heap()->unpin_object(thread, JNIHandles::resolve_non_null(array));
2897 HOTSPOT_JNI_RELEASEPRIMITIVEARRAYCRITICAL_RETURN();
2898 JNI_END
2899
2900
2901 JNI_ENTRY(const jchar*, jni_GetStringCritical(JNIEnv *env, jstring string, jboolean *isCopy))
2902 HOTSPOT_JNI_GETSTRINGCRITICAL_ENTRY(env, string, (uintptr_t *) isCopy);
2903 oop s = JNIHandles::resolve_non_null(string);
2904 jchar* ret;
2905 if (!java_lang_String::is_latin1(s)) {
2906 typeArrayHandle s_value(thread, java_lang_String::value(s));
2907
2908 // Pin value array
2909 Universe::heap()->pin_object(thread, s_value());
2910
2911 ret = (jchar*) s_value->base(T_CHAR);
2912 if (isCopy != nullptr) *isCopy = JNI_FALSE;
2913 } else {
2914 // Inflate latin1 encoded string to UTF16
2915 typeArrayOop s_value = java_lang_String::value(s);
2916 int s_len = java_lang_String::length(s, s_value);
2917 ret = NEW_C_HEAP_ARRAY_RETURN_NULL(jchar, s_len + 1, mtInternal); // add one for zero termination
2918 /* JNI Specification states return null on OOM */
2919 if (ret != nullptr) {
2920 for (int i = 0; i < s_len; i++) {
2921 ret[i] = ((jchar) s_value->byte_at(i)) & 0xff;
2922 }
2923 ret[s_len] = 0;
2924 }
2925 if (isCopy != nullptr) *isCopy = JNI_TRUE;
2926 }
2927 HOTSPOT_JNI_GETSTRINGCRITICAL_RETURN((uint16_t *) ret);
2928 return ret;
2929 JNI_END
2930
2931
2932 JNI_ENTRY(void, jni_ReleaseStringCritical(JNIEnv *env, jstring str, const jchar *chars))
2933 HOTSPOT_JNI_RELEASESTRINGCRITICAL_ENTRY(env, str, (uint16_t *) chars);
2934 oop s = JNIHandles::resolve_non_null(str);
2935 bool is_latin1 = java_lang_String::is_latin1(s);
2936
2937 if (is_latin1) {
2938 // For latin1 string, free jchar array allocated by earlier call to GetStringCritical.
2939 // This assumes that ReleaseStringCritical bookends GetStringCritical.
2940 FREE_C_HEAP_ARRAY(jchar, chars);
2941 } else {
2942 // StringDedup can have replaced the value array, so don't fetch the array from 's'.
2943 // Instead, we calculate the address based on the jchar array exposed with GetStringCritical.
2944 oop value = cast_to_oop((address)chars - arrayOopDesc::base_offset_in_bytes(T_CHAR));
2945
2946 // Unpin value array
2947 Universe::heap()->unpin_object(thread, value);
2948 }
2949 HOTSPOT_JNI_RELEASESTRINGCRITICAL_RETURN();
2950 JNI_END
2951
2952
2953 JNI_ENTRY(jweak, jni_NewWeakGlobalRef(JNIEnv *env, jobject ref))
2954 HOTSPOT_JNI_NEWWEAKGLOBALREF_ENTRY(env, ref);
2955 Handle ref_handle(thread, JNIHandles::resolve(ref));
2956 jweak ret = JNIHandles::make_weak_global(ref_handle, AllocFailStrategy::RETURN_NULL);
2957 if (ret == nullptr && ref_handle.not_null()) {
2958 THROW_OOP_(Universe::out_of_memory_error_c_heap(), nullptr);
2959 }
2960 HOTSPOT_JNI_NEWWEAKGLOBALREF_RETURN(ret);
2961 return ret;
2962 JNI_END
2963
2964 // Must be JNI_ENTRY (with HandleMark)
2965 JNI_ENTRY(void, jni_DeleteWeakGlobalRef(JNIEnv *env, jweak ref))
2966 HOTSPOT_JNI_DELETEWEAKGLOBALREF_ENTRY(env, ref);
2967 JNIHandles::destroy_weak_global(ref);
2968 HOTSPOT_JNI_DELETEWEAKGLOBALREF_RETURN();
2969 JNI_END
2970
2971
2972 JNI_ENTRY_NO_PRESERVE(jboolean, jni_ExceptionCheck(JNIEnv *env))
2973 HOTSPOT_JNI_EXCEPTIONCHECK_ENTRY(env);
2974 jni_check_async_exceptions(thread);
2975 jboolean ret = (thread->has_pending_exception()) ? JNI_TRUE : JNI_FALSE;
2976 HOTSPOT_JNI_EXCEPTIONCHECK_RETURN(ret);
2977 return ret;
2978 JNI_END
2979
2980
2981 // Initialization state for three routines below relating to
2982 // java.nio.DirectBuffers
2983 static int directBufferSupportInitializeStarted = 0;
2984 static volatile int directBufferSupportInitializeEnded = 0;
2985 static volatile int directBufferSupportInitializeFailed = 0;
2986 static jclass bufferClass = nullptr;
2987 static jclass directBufferClass = nullptr;
2988 static jclass directByteBufferClass = nullptr;
2989 static jmethodID directByteBufferConstructor = nullptr;
2990 static jfieldID directBufferAddressField = nullptr;
2991 static jfieldID bufferCapacityField = nullptr;
2992
2993 static jclass lookupOne(JNIEnv* env, const char* name, TRAPS) {
2994 Handle loader; // null (bootstrap) loader
2995
2996 TempNewSymbol sym = SymbolTable::new_symbol(name);
2997 jclass result = find_class_from_class_loader(env, sym, true, loader, true, CHECK_NULL);
2998
2999 if (log_is_enabled(Debug, class, resolve) && result != nullptr) {
3000 trace_class_resolution(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(result)));
3001 }
3002 return result;
3003 }
3004
3005 // These lookups are done with the null (bootstrap) ClassLoader to
3006 // circumvent any security checks that would be done by jni_FindClass.
3007 JNI_ENTRY(bool, lookupDirectBufferClasses(JNIEnv* env))
3008 {
3009 if ((bufferClass = lookupOne(env, "java/nio/Buffer", thread)) == nullptr) { return false; }
3010 if ((directBufferClass = lookupOne(env, "sun/nio/ch/DirectBuffer", thread)) == nullptr) { return false; }
3011 if ((directByteBufferClass = lookupOne(env, "java/nio/DirectByteBuffer", thread)) == nullptr) { return false; }
3012 return true;
3013 }
3014 JNI_END
3015
3016
3017 static bool initializeDirectBufferSupport(JNIEnv* env, JavaThread* thread) {
3018 if (directBufferSupportInitializeFailed) {
3019 return false;
3020 }
3021
3022 if (Atomic::cmpxchg(&directBufferSupportInitializeStarted, 0, 1) == 0) {
3023 if (!lookupDirectBufferClasses(env)) {
3024 directBufferSupportInitializeFailed = 1;
3025 return false;
3026 }
3027
3028 // Make global references for these
3029 bufferClass = (jclass) env->NewGlobalRef(bufferClass);
3030 directBufferClass = (jclass) env->NewGlobalRef(directBufferClass);
3031 directByteBufferClass = (jclass) env->NewGlobalRef(directByteBufferClass);
3032
3033 // Global refs will be null if out-of-memory (no exception is pending)
3034 if (bufferClass == nullptr || directBufferClass == nullptr || directByteBufferClass == nullptr) {
3035 directBufferSupportInitializeFailed = 1;
3036 return false;
3037 }
3038
3039 // Get needed field and method IDs
3040 directByteBufferConstructor = env->GetMethodID(directByteBufferClass, "<init>", "(JJ)V");
3041 if (env->ExceptionCheck()) {
3042 env->ExceptionClear();
3043 directBufferSupportInitializeFailed = 1;
3044 return false;
3045 }
3046 directBufferAddressField = env->GetFieldID(bufferClass, "address", "J");
3047 if (env->ExceptionCheck()) {
3048 env->ExceptionClear();
3049 directBufferSupportInitializeFailed = 1;
3050 return false;
3051 }
3052 bufferCapacityField = env->GetFieldID(bufferClass, "capacity", "I");
3053 if (env->ExceptionCheck()) {
3054 env->ExceptionClear();
3055 directBufferSupportInitializeFailed = 1;
3056 return false;
3057 }
3058
3059 if ((directByteBufferConstructor == nullptr) ||
3060 (directBufferAddressField == nullptr) ||
3061 (bufferCapacityField == nullptr)) {
3062 directBufferSupportInitializeFailed = 1;
3063 return false;
3064 }
3065
3066 directBufferSupportInitializeEnded = 1;
3067 } else {
3068 while (!directBufferSupportInitializeEnded && !directBufferSupportInitializeFailed) {
3069 os::naked_yield();
3070 }
3071 }
3072
3073 return !directBufferSupportInitializeFailed;
3074 }
3075
3076 extern "C" jobject JNICALL jni_NewDirectByteBuffer(JNIEnv *env, void* address, jlong capacity)
3077 {
3078 // thread_from_jni_environment() will block if VM is gone.
3079 JavaThread* thread = JavaThread::thread_from_jni_environment(env);
3080
3081 HOTSPOT_JNI_NEWDIRECTBYTEBUFFER_ENTRY(env, address, capacity);
3082
3083 if (!directBufferSupportInitializeEnded) {
3084 if (!initializeDirectBufferSupport(env, thread)) {
3085 HOTSPOT_JNI_NEWDIRECTBYTEBUFFER_RETURN(nullptr);
3086 return nullptr;
3087 }
3088 }
3089
3090 // Being paranoid about accidental sign extension on address
3091 jlong addr = (jlong) ((uintptr_t) address);
3092 jobject ret = env->NewObject(directByteBufferClass, directByteBufferConstructor, addr, capacity);
3093 HOTSPOT_JNI_NEWDIRECTBYTEBUFFER_RETURN(ret);
3094 return ret;
3095 }
3096
3097 DT_RETURN_MARK_DECL(GetDirectBufferAddress, void*
3098 , HOTSPOT_JNI_GETDIRECTBUFFERADDRESS_RETURN((void*) _ret_ref));
3099
3100 extern "C" void* JNICALL jni_GetDirectBufferAddress(JNIEnv *env, jobject buf)
3101 {
3102 // thread_from_jni_environment() will block if VM is gone.
3103 JavaThread* thread = JavaThread::thread_from_jni_environment(env);
3104
3105 HOTSPOT_JNI_GETDIRECTBUFFERADDRESS_ENTRY(env, buf);
3106 void* ret = nullptr;
3107 DT_RETURN_MARK(GetDirectBufferAddress, void*, (const void*&)ret);
3108
3109 if (!directBufferSupportInitializeEnded) {
3110 if (!initializeDirectBufferSupport(env, thread)) {
3111 return nullptr;
3112 }
3113 }
3114
3115 if ((buf != nullptr) && (!env->IsInstanceOf(buf, directBufferClass))) {
3116 return nullptr;
3117 }
3118
3119 ret = (void*)(intptr_t)env->GetLongField(buf, directBufferAddressField);
3120 return ret;
3121 }
3122
3123 DT_RETURN_MARK_DECL(GetDirectBufferCapacity, jlong
3124 , HOTSPOT_JNI_GETDIRECTBUFFERCAPACITY_RETURN(_ret_ref));
3125
3126 extern "C" jlong JNICALL jni_GetDirectBufferCapacity(JNIEnv *env, jobject buf)
3127 {
3128 // thread_from_jni_environment() will block if VM is gone.
3129 JavaThread* thread = JavaThread::thread_from_jni_environment(env);
3130
3131 HOTSPOT_JNI_GETDIRECTBUFFERCAPACITY_ENTRY(env, buf);
3132 jlong ret = -1;
3133 DT_RETURN_MARK(GetDirectBufferCapacity, jlong, (const jlong&)ret);
3134
3135 if (!directBufferSupportInitializeEnded) {
3136 if (!initializeDirectBufferSupport(env, thread)) {
3137 ret = 0;
3138 return ret;
3139 }
3140 }
3141
3142 if (buf == nullptr) {
3143 return -1;
3144 }
3145
3146 if (!env->IsInstanceOf(buf, directBufferClass)) {
3147 return -1;
3148 }
3149
3150 // NOTE that capacity is currently an int in the implementation
3151 ret = env->GetIntField(buf, bufferCapacityField);
3152 return ret;
3153 }
3154
3155
3156 JNI_LEAF(jint, jni_GetVersion(JNIEnv *env))
3157 HOTSPOT_JNI_GETVERSION_ENTRY(env);
3158 HOTSPOT_JNI_GETVERSION_RETURN(CurrentVersion);
3159 return CurrentVersion;
3160 JNI_END
3161
3162 extern struct JavaVM_ main_vm;
3163
3164 JNI_LEAF(jint, jni_GetJavaVM(JNIEnv *env, JavaVM **vm))
3165 HOTSPOT_JNI_GETJAVAVM_ENTRY(env, (void **) vm);
3166 *vm = (JavaVM *)(&main_vm);
3167 HOTSPOT_JNI_GETJAVAVM_RETURN(JNI_OK);
3168 return JNI_OK;
3169 JNI_END
3170
3171
3172 JNI_ENTRY(jobject, jni_GetModule(JNIEnv* env, jclass clazz))
3173 return Modules::get_module(clazz, THREAD);
3174 JNI_END
3175
3176 JNI_ENTRY(jboolean, jni_IsVirtualThread(JNIEnv* env, jobject obj))
3177 oop thread_obj = JNIHandles::resolve_external_guard(obj);
3178 if (thread_obj != nullptr && thread_obj->is_a(vmClasses::BaseVirtualThread_klass())) {
3179 return JNI_TRUE;
3180 } else {
3181 return JNI_FALSE;
3182 }
3183 JNI_END
3184
3185
3186 // Structure containing all jni functions
3187 struct JNINativeInterface_ jni_NativeInterface = {
3188 nullptr,
3189 nullptr,
3190 nullptr,
3191
3192 nullptr,
3193
3194 jni_GetVersion,
3195
3196 jni_DefineClass,
3197 jni_FindClass,
3198
3199 jni_FromReflectedMethod,
3200 jni_FromReflectedField,
3201
3202 jni_ToReflectedMethod,
3203
3204 jni_GetSuperclass,
3205 jni_IsAssignableFrom,
3206
3207 jni_ToReflectedField,
3208
3209 jni_Throw,
3210 jni_ThrowNew,
3211 jni_ExceptionOccurred,
3212 jni_ExceptionDescribe,
3213 jni_ExceptionClear,
3214 jni_FatalError,
3215
3216 jni_PushLocalFrame,
3217 jni_PopLocalFrame,
3218
3219 jni_NewGlobalRef,
3220 jni_DeleteGlobalRef,
3221 jni_DeleteLocalRef,
3222 jni_IsSameObject,
3223
3224 jni_NewLocalRef,
3225 jni_EnsureLocalCapacity,
3226
3227 jni_AllocObject,
3228 jni_NewObject,
3229 jni_NewObjectV,
3230 jni_NewObjectA,
3231
3232 jni_GetObjectClass,
3233 jni_IsInstanceOf,
3234
3235 jni_GetMethodID,
3236
3237 jni_CallObjectMethod,
3238 jni_CallObjectMethodV,
3239 jni_CallObjectMethodA,
3240 jni_CallBooleanMethod,
3241 jni_CallBooleanMethodV,
3242 jni_CallBooleanMethodA,
3243 jni_CallByteMethod,
3244 jni_CallByteMethodV,
3245 jni_CallByteMethodA,
3246 jni_CallCharMethod,
3247 jni_CallCharMethodV,
3248 jni_CallCharMethodA,
3249 jni_CallShortMethod,
3250 jni_CallShortMethodV,
3251 jni_CallShortMethodA,
3252 jni_CallIntMethod,
3253 jni_CallIntMethodV,
3254 jni_CallIntMethodA,
3255 jni_CallLongMethod,
3256 jni_CallLongMethodV,
3257 jni_CallLongMethodA,
3258 jni_CallFloatMethod,
3259 jni_CallFloatMethodV,
3260 jni_CallFloatMethodA,
3261 jni_CallDoubleMethod,
3262 jni_CallDoubleMethodV,
3263 jni_CallDoubleMethodA,
3264 jni_CallVoidMethod,
3265 jni_CallVoidMethodV,
3266 jni_CallVoidMethodA,
3267
3268 jni_CallNonvirtualObjectMethod,
3269 jni_CallNonvirtualObjectMethodV,
3270 jni_CallNonvirtualObjectMethodA,
3271 jni_CallNonvirtualBooleanMethod,
3272 jni_CallNonvirtualBooleanMethodV,
3273 jni_CallNonvirtualBooleanMethodA,
3274 jni_CallNonvirtualByteMethod,
3275 jni_CallNonvirtualByteMethodV,
3276 jni_CallNonvirtualByteMethodA,
3277 jni_CallNonvirtualCharMethod,
3278 jni_CallNonvirtualCharMethodV,
3279 jni_CallNonvirtualCharMethodA,
3280 jni_CallNonvirtualShortMethod,
3281 jni_CallNonvirtualShortMethodV,
3282 jni_CallNonvirtualShortMethodA,
3283 jni_CallNonvirtualIntMethod,
3284 jni_CallNonvirtualIntMethodV,
3285 jni_CallNonvirtualIntMethodA,
3286 jni_CallNonvirtualLongMethod,
3287 jni_CallNonvirtualLongMethodV,
3288 jni_CallNonvirtualLongMethodA,
3289 jni_CallNonvirtualFloatMethod,
3290 jni_CallNonvirtualFloatMethodV,
3291 jni_CallNonvirtualFloatMethodA,
3292 jni_CallNonvirtualDoubleMethod,
3293 jni_CallNonvirtualDoubleMethodV,
3294 jni_CallNonvirtualDoubleMethodA,
3295 jni_CallNonvirtualVoidMethod,
3296 jni_CallNonvirtualVoidMethodV,
3297 jni_CallNonvirtualVoidMethodA,
3298
3299 jni_GetFieldID,
3300
3301 jni_GetObjectField,
3302 jni_GetBooleanField,
3303 jni_GetByteField,
3304 jni_GetCharField,
3305 jni_GetShortField,
3306 jni_GetIntField,
3307 jni_GetLongField,
3308 jni_GetFloatField,
3309 jni_GetDoubleField,
3310
3311 jni_SetObjectField,
3312 jni_SetBooleanField,
3313 jni_SetByteField,
3314 jni_SetCharField,
3315 jni_SetShortField,
3316 jni_SetIntField,
3317 jni_SetLongField,
3318 jni_SetFloatField,
3319 jni_SetDoubleField,
3320
3321 jni_GetStaticMethodID,
3322
3323 jni_CallStaticObjectMethod,
3324 jni_CallStaticObjectMethodV,
3325 jni_CallStaticObjectMethodA,
3326 jni_CallStaticBooleanMethod,
3327 jni_CallStaticBooleanMethodV,
3328 jni_CallStaticBooleanMethodA,
3329 jni_CallStaticByteMethod,
3330 jni_CallStaticByteMethodV,
3331 jni_CallStaticByteMethodA,
3332 jni_CallStaticCharMethod,
3333 jni_CallStaticCharMethodV,
3334 jni_CallStaticCharMethodA,
3335 jni_CallStaticShortMethod,
3336 jni_CallStaticShortMethodV,
3337 jni_CallStaticShortMethodA,
3338 jni_CallStaticIntMethod,
3339 jni_CallStaticIntMethodV,
3340 jni_CallStaticIntMethodA,
3341 jni_CallStaticLongMethod,
3342 jni_CallStaticLongMethodV,
3343 jni_CallStaticLongMethodA,
3344 jni_CallStaticFloatMethod,
3345 jni_CallStaticFloatMethodV,
3346 jni_CallStaticFloatMethodA,
3347 jni_CallStaticDoubleMethod,
3348 jni_CallStaticDoubleMethodV,
3349 jni_CallStaticDoubleMethodA,
3350 jni_CallStaticVoidMethod,
3351 jni_CallStaticVoidMethodV,
3352 jni_CallStaticVoidMethodA,
3353
3354 jni_GetStaticFieldID,
3355
3356 jni_GetStaticObjectField,
3357 jni_GetStaticBooleanField,
3358 jni_GetStaticByteField,
3359 jni_GetStaticCharField,
3360 jni_GetStaticShortField,
3361 jni_GetStaticIntField,
3362 jni_GetStaticLongField,
3363 jni_GetStaticFloatField,
3364 jni_GetStaticDoubleField,
3365
3366 jni_SetStaticObjectField,
3367 jni_SetStaticBooleanField,
3368 jni_SetStaticByteField,
3369 jni_SetStaticCharField,
3370 jni_SetStaticShortField,
3371 jni_SetStaticIntField,
3372 jni_SetStaticLongField,
3373 jni_SetStaticFloatField,
3374 jni_SetStaticDoubleField,
3375
3376 jni_NewString,
3377 jni_GetStringLength,
3378 jni_GetStringChars,
3379 jni_ReleaseStringChars,
3380
3381 jni_NewStringUTF,
3382 jni_GetStringUTFLength,
3383 jni_GetStringUTFChars,
3384 jni_ReleaseStringUTFChars,
3385
3386 jni_GetArrayLength,
3387
3388 jni_NewObjectArray,
3389 jni_GetObjectArrayElement,
3390 jni_SetObjectArrayElement,
3391
3392 jni_NewBooleanArray,
3393 jni_NewByteArray,
3394 jni_NewCharArray,
3395 jni_NewShortArray,
3396 jni_NewIntArray,
3397 jni_NewLongArray,
3398 jni_NewFloatArray,
3399 jni_NewDoubleArray,
3400
3401 jni_GetBooleanArrayElements,
3402 jni_GetByteArrayElements,
3403 jni_GetCharArrayElements,
3404 jni_GetShortArrayElements,
3405 jni_GetIntArrayElements,
3406 jni_GetLongArrayElements,
3407 jni_GetFloatArrayElements,
3408 jni_GetDoubleArrayElements,
3409
3410 jni_ReleaseBooleanArrayElements,
3411 jni_ReleaseByteArrayElements,
3412 jni_ReleaseCharArrayElements,
3413 jni_ReleaseShortArrayElements,
3414 jni_ReleaseIntArrayElements,
3415 jni_ReleaseLongArrayElements,
3416 jni_ReleaseFloatArrayElements,
3417 jni_ReleaseDoubleArrayElements,
3418
3419 jni_GetBooleanArrayRegion,
3420 jni_GetByteArrayRegion,
3421 jni_GetCharArrayRegion,
3422 jni_GetShortArrayRegion,
3423 jni_GetIntArrayRegion,
3424 jni_GetLongArrayRegion,
3425 jni_GetFloatArrayRegion,
3426 jni_GetDoubleArrayRegion,
3427
3428 jni_SetBooleanArrayRegion,
3429 jni_SetByteArrayRegion,
3430 jni_SetCharArrayRegion,
3431 jni_SetShortArrayRegion,
3432 jni_SetIntArrayRegion,
3433 jni_SetLongArrayRegion,
3434 jni_SetFloatArrayRegion,
3435 jni_SetDoubleArrayRegion,
3436
3437 jni_RegisterNatives,
3438 jni_UnregisterNatives,
3439
3440 jni_MonitorEnter,
3441 jni_MonitorExit,
3442
3443 jni_GetJavaVM,
3444
3445 jni_GetStringRegion,
3446 jni_GetStringUTFRegion,
3447
3448 jni_GetPrimitiveArrayCritical,
3449 jni_ReleasePrimitiveArrayCritical,
3450
3451 jni_GetStringCritical,
3452 jni_ReleaseStringCritical,
3453
3454 jni_NewWeakGlobalRef,
3455 jni_DeleteWeakGlobalRef,
3456
3457 jni_ExceptionCheck,
3458
3459 jni_NewDirectByteBuffer,
3460 jni_GetDirectBufferAddress,
3461 jni_GetDirectBufferCapacity,
3462
3463 // New 1_6 features
3464
3465 jni_GetObjectRefType,
3466
3467 // Module features
3468
3469 jni_GetModule,
3470
3471 // Virtual threads
3472
3473 jni_IsVirtualThread,
3474
3475 // Large UTF8 support
3476
3477 jni_GetStringUTFLengthAsLong
3478 };
3479
3480
3481 // For jvmti use to modify jni function table.
3482 // Java threads in native contiues to run until it is transitioned
3483 // to VM at safepoint. Before the transition or before it is blocked
3484 // for safepoint it may access jni function table. VM could crash if
3485 // any java thread access the jni function table in the middle of memcpy.
3486 // To avoid this each function pointers are copied automically.
3487 void copy_jni_function_table(const struct JNINativeInterface_ *new_jni_NativeInterface) {
3488 assert(SafepointSynchronize::is_at_safepoint(), "must be at safepoint");
3489 intptr_t *a = (intptr_t *) jni_functions();
3490 intptr_t *b = (intptr_t *) new_jni_NativeInterface;
3491 for (uint i=0; i < sizeof(struct JNINativeInterface_)/sizeof(void *); i++) {
3492 Atomic::store(a++, *b++);
3493 }
3494 }
3495
3496 void quicken_jni_functions() {
3497 // Replace Get<Primitive>Field with fast versions
3498 if (UseFastJNIAccessors && !VerifyJNIFields && !CheckJNICalls) {
3499 address func;
3500 func = JNI_FastGetField::generate_fast_get_boolean_field();
3501 if (func != (address)-1) {
3502 jni_NativeInterface.GetBooleanField = (GetBooleanField_t)func;
3503 }
3504 func = JNI_FastGetField::generate_fast_get_byte_field();
3505 if (func != (address)-1) {
3506 jni_NativeInterface.GetByteField = (GetByteField_t)func;
3507 }
3508 func = JNI_FastGetField::generate_fast_get_char_field();
3509 if (func != (address)-1) {
3510 jni_NativeInterface.GetCharField = (GetCharField_t)func;
3511 }
3512 func = JNI_FastGetField::generate_fast_get_short_field();
3513 if (func != (address)-1) {
3514 jni_NativeInterface.GetShortField = (GetShortField_t)func;
3515 }
3516 func = JNI_FastGetField::generate_fast_get_int_field();
3517 if (func != (address)-1) {
3518 jni_NativeInterface.GetIntField = (GetIntField_t)func;
3519 }
3520 func = JNI_FastGetField::generate_fast_get_long_field();
3521 if (func != (address)-1) {
3522 jni_NativeInterface.GetLongField = (GetLongField_t)func;
3523 }
3524 func = JNI_FastGetField::generate_fast_get_float_field();
3525 if (func != (address)-1) {
3526 jni_NativeInterface.GetFloatField = (GetFloatField_t)func;
3527 }
3528 func = JNI_FastGetField::generate_fast_get_double_field();
3529 if (func != (address)-1) {
3530 jni_NativeInterface.GetDoubleField = (GetDoubleField_t)func;
3531 }
3532 }
3533 }
3534
3535 // Returns the function structure
3536 struct JNINativeInterface_* jni_functions() {
3537 #if INCLUDE_JNI_CHECK
3538 if (CheckJNICalls) return jni_functions_check();
3539 #endif // INCLUDE_JNI_CHECK
3540 return &jni_NativeInterface;
3541 }
3542
3543 // Returns the function structure
3544 struct JNINativeInterface_* jni_functions_nocheck() {
3545 return &jni_NativeInterface;
3546 }
3547
3548
3549 // Invocation API
3550
3551
3552 // Forward declaration
3553 extern const struct JNIInvokeInterface_ jni_InvokeInterface;
3554
3555 // Global invocation API vars
3556 enum VM_Creation_State {
3557 NOT_CREATED = 0,
3558 IN_PROGRESS, // Most JNI operations are permitted during this phase to
3559 // allow for initialization actions by libraries and agents.
3560 COMPLETE
3561 };
3562
3563 volatile VM_Creation_State vm_created = NOT_CREATED;
3564
3565 // Indicate whether it is safe to recreate VM. Recreation is only
3566 // possible after a failed initial creation attempt in some cases.
3567 volatile int safe_to_recreate_vm = 1;
3568 struct JavaVM_ main_vm = {&jni_InvokeInterface};
3569
3570
3571 #define JAVASTACKSIZE (400 * 1024) /* Default size of a thread java stack */
3572 enum { VERIFY_NONE, VERIFY_REMOTE, VERIFY_ALL };
3573
3574 DT_RETURN_MARK_DECL(GetDefaultJavaVMInitArgs, jint
3575 , HOTSPOT_JNI_GETDEFAULTJAVAVMINITARGS_RETURN(_ret_ref));
3576
3577 _JNI_IMPORT_OR_EXPORT_ jint JNICALL JNI_GetDefaultJavaVMInitArgs(void *args_) {
3578 HOTSPOT_JNI_GETDEFAULTJAVAVMINITARGS_ENTRY(args_);
3579 JDK1_1InitArgs *args = (JDK1_1InitArgs *)args_;
3580 jint ret = JNI_ERR;
3581 DT_RETURN_MARK(GetDefaultJavaVMInitArgs, jint, (const jint&)ret);
3582
3583 if (Threads::is_supported_jni_version(args->version)) {
3584 ret = JNI_OK;
3585 }
3586 // 1.1 style no longer supported in hotspot.
3587 // According the JNI spec, we should update args->version on return.
3588 // We also use the structure to communicate with launcher about default
3589 // stack size.
3590 if (args->version == JNI_VERSION_1_1) {
3591 args->version = JNI_VERSION_1_2;
3592 // javaStackSize is int in arguments structure
3593 assert(jlong(ThreadStackSize) * K < INT_MAX, "integer overflow");
3594 args->javaStackSize = (jint)(ThreadStackSize * K);
3595 }
3596 return ret;
3597 }
3598
3599 DT_RETURN_MARK_DECL(CreateJavaVM, jint
3600 , HOTSPOT_JNI_CREATEJAVAVM_RETURN(_ret_ref));
3601
3602 static jint JNI_CreateJavaVM_inner(JavaVM **vm, void **penv, void *args) {
3603 HOTSPOT_JNI_CREATEJAVAVM_ENTRY((void **) vm, penv, args);
3604
3605 jint result = JNI_ERR;
3606 DT_RETURN_MARK(CreateJavaVM, jint, (const jint&)result);
3607
3608 // We're about to use Atomic::xchg for synchronization. Some Zero
3609 // platforms use the GCC builtin __sync_lock_test_and_set for this,
3610 // but __sync_lock_test_and_set is not guaranteed to do what we want
3611 // on all architectures. So we check it works before relying on it.
3612 #if defined(ZERO) && defined(ASSERT)
3613 {
3614 jint a = 0xcafebabe;
3615 jint b = Atomic::xchg(&a, (jint) 0xdeadbeef);
3616 void *c = &a;
3617 void *d = Atomic::xchg(&c, &b);
3618 assert(a == (jint) 0xdeadbeef && b == (jint) 0xcafebabe, "Atomic::xchg() works");
3619 assert(c == &b && d == &a, "Atomic::xchg() works");
3620 }
3621 #endif // ZERO && ASSERT
3622
3623 // At the moment it's only possible to have one Java VM,
3624 // since some of the runtime state is in global variables.
3625
3626 // We cannot use our mutex locks here, since they only work on
3627 // Threads. We do an atomic compare and exchange to ensure only
3628 // one thread can call this method at a time
3629
3630 // We use Atomic::xchg rather than Atomic::add/dec since on some platforms
3631 // the add/dec implementations are dependent on whether we are running
3632 // on a multiprocessor Atomic::xchg does not have this problem.
3633 if (Atomic::xchg(&vm_created, IN_PROGRESS) != NOT_CREATED) {
3634 return JNI_EEXIST; // already created, or create attempt in progress
3635 }
3636
3637 // If a previous creation attempt failed but can be retried safely,
3638 // then safe_to_recreate_vm will have been reset to 1 after being
3639 // cleared here. If a previous creation attempt succeeded and we then
3640 // destroyed that VM, we will be prevented from trying to recreate
3641 // the VM in the same process, as the value will still be 0.
3642 if (Atomic::xchg(&safe_to_recreate_vm, 0) == 0) {
3643 return JNI_ERR;
3644 }
3645
3646 /**
3647 * Certain errors during initialization are recoverable and do not
3648 * prevent this method from being called again at a later time
3649 * (perhaps with different arguments). However, at a certain
3650 * point during initialization if an error occurs we cannot allow
3651 * this function to be called again (or it will crash). In those
3652 * situations, the 'canTryAgain' flag is set to false, which atomically
3653 * sets safe_to_recreate_vm to 1, such that any new call to
3654 * JNI_CreateJavaVM will immediately fail using the above logic.
3655 */
3656 bool can_try_again = true;
3657
3658 result = Threads::create_vm((JavaVMInitArgs*) args, &can_try_again);
3659 if (result == JNI_OK) {
3660 JavaThread *thread = JavaThread::current();
3661 assert(!thread->has_pending_exception(), "should have returned not OK");
3662 // thread is thread_in_vm here
3663 *vm = (JavaVM *)(&main_vm);
3664 *(JNIEnv**)penv = thread->jni_environment();
3665 // mark creation complete for other JNI ops
3666 Atomic::release_store(&vm_created, COMPLETE);
3667
3668 #if INCLUDE_JVMCI
3669 if (EnableJVMCI) {
3670 if (UseJVMCICompiler) {
3671 // JVMCI is initialized on a CompilerThread
3672 if (BootstrapJVMCI) {
3673 JavaThread* THREAD = thread; // For exception macros.
3674 JVMCICompiler* compiler = JVMCICompiler::instance(true, CATCH);
3675 compiler->bootstrap(THREAD);
3676 if (HAS_PENDING_EXCEPTION) {
3677 HandleMark hm(THREAD);
3678 vm_exit_during_initialization(Handle(THREAD, PENDING_EXCEPTION));
3679 }
3680 }
3681 }
3682 }
3683 #endif
3684
3685 // Notify JVMTI
3686 if (JvmtiExport::should_post_thread_life()) {
3687 JvmtiExport::post_thread_start(thread);
3688 }
3689
3690 JFR_ONLY(Jfr::on_thread_start(thread);)
3691
3692 if (ReplayCompiles) ciReplay::replay(thread);
3693
3694 #ifdef ASSERT
3695 // Some platforms (like Win*) need a wrapper around these test
3696 // functions in order to properly handle error conditions.
3697 if (ErrorHandlerTest != 0) {
3698 VMError::controlled_crash(ErrorHandlerTest);
3699 }
3700 #endif
3701
3702 // Since this is not a JVM_ENTRY we have to set the thread state manually before leaving.
3703 ThreadStateTransition::transition_from_vm(thread, _thread_in_native);
3704 MACOS_AARCH64_ONLY(thread->enable_wx(WXExec));
3705 } else {
3706 // If create_vm exits because of a pending exception, exit with that
3707 // exception. In the future when we figure out how to reclaim memory,
3708 // we may be able to exit with JNI_ERR and allow the calling application
3709 // to continue.
3710 if (Universe::is_fully_initialized()) {
3711 // otherwise no pending exception possible - VM will already have aborted
3712 Thread* current = Thread::current_or_null();
3713 if (current != nullptr) {
3714 JavaThread* THREAD = JavaThread::cast(current); // For exception macros.
3715 assert(HAS_PENDING_EXCEPTION, "must be - else no current thread exists");
3716 HandleMark hm(THREAD);
3717 vm_exit_during_initialization(Handle(THREAD, PENDING_EXCEPTION));
3718 }
3719 }
3720
3721 if (can_try_again) {
3722 // reset safe_to_recreate_vm to 1 so that retrial would be possible
3723 safe_to_recreate_vm = 1;
3724 }
3725
3726 // Creation failed. We must reset vm_created
3727 *vm = nullptr;
3728 *(JNIEnv**)penv = nullptr;
3729 // reset vm_created last to avoid race condition. Use OrderAccess to
3730 // control both compiler and architectural-based reordering.
3731 assert(vm_created == IN_PROGRESS, "must be");
3732 Atomic::release_store(&vm_created, NOT_CREATED);
3733 }
3734
3735 // Flush stdout and stderr before exit.
3736 fflush(stdout);
3737 fflush(stderr);
3738
3739 return result;
3740
3741 }
3742
3743 _JNI_IMPORT_OR_EXPORT_ jint JNICALL JNI_CreateJavaVM(JavaVM **vm, void **penv, void *args) {
3744 jint result = JNI_ERR;
3745 // On Windows, let CreateJavaVM run with SEH protection
3746 #if defined(_WIN32) && !defined(USE_VECTORED_EXCEPTION_HANDLING)
3747 __try {
3748 #endif
3749 result = JNI_CreateJavaVM_inner(vm, penv, args);
3750 #if defined(_WIN32) && !defined(USE_VECTORED_EXCEPTION_HANDLING)
3751 } __except(topLevelExceptionFilter((_EXCEPTION_POINTERS*)_exception_info())) {
3752 // Nothing to do.
3753 }
3754 #endif
3755 return result;
3756 }
3757
3758 _JNI_IMPORT_OR_EXPORT_ jint JNICALL JNI_GetCreatedJavaVMs(JavaVM **vm_buf, jsize bufLen, jsize *numVMs) {
3759 HOTSPOT_JNI_GETCREATEDJAVAVMS_ENTRY((void **) vm_buf, bufLen, (uintptr_t *) numVMs);
3760
3761 if (vm_created == COMPLETE) {
3762 if (numVMs != nullptr) *numVMs = 1;
3763 if (bufLen > 0) *vm_buf = (JavaVM *)(&main_vm);
3764 } else {
3765 if (numVMs != nullptr) *numVMs = 0;
3766 }
3767 HOTSPOT_JNI_GETCREATEDJAVAVMS_RETURN(JNI_OK);
3768 return JNI_OK;
3769 }
3770
3771 extern "C" {
3772
3773 DT_RETURN_MARK_DECL(DestroyJavaVM, jint
3774 , HOTSPOT_JNI_DESTROYJAVAVM_RETURN(_ret_ref));
3775
3776 static jint JNICALL jni_DestroyJavaVM_inner(JavaVM *vm) {
3777 HOTSPOT_JNI_DESTROYJAVAVM_ENTRY(vm);
3778 jint res = JNI_ERR;
3779 DT_RETURN_MARK(DestroyJavaVM, jint, (const jint&)res);
3780
3781 if (vm_created == NOT_CREATED) {
3782 res = JNI_ERR;
3783 return res;
3784 }
3785
3786 JNIEnv *env;
3787 JavaVMAttachArgs destroyargs;
3788 destroyargs.version = CurrentVersion;
3789 destroyargs.name = (char *)"DestroyJavaVM";
3790 destroyargs.group = nullptr;
3791 res = vm->AttachCurrentThread((void **)&env, (void *)&destroyargs);
3792 if (res != JNI_OK) {
3793 return res;
3794 }
3795
3796 JavaThread* thread = JavaThread::current();
3797
3798 // Make sure we are actually in a newly attached thread, with no
3799 // existing Java frame.
3800 if (thread->has_last_Java_frame()) {
3801 return JNI_ERR;
3802 }
3803
3804 // Since this is not a JVM_ENTRY we have to set the thread state manually before entering.
3805
3806 // We are going to VM, change W^X state to the expected one.
3807 MACOS_AARCH64_ONLY(WXMode oldmode = thread->enable_wx(WXWrite));
3808
3809 ThreadStateTransition::transition_from_native(thread, _thread_in_vm);
3810 Threads::destroy_vm();
3811 // Don't bother restoring thread state, VM is gone.
3812 vm_created = NOT_CREATED;
3813 return JNI_OK;
3814 }
3815
3816 jint JNICALL jni_DestroyJavaVM(JavaVM *vm) {
3817 jint result = JNI_ERR;
3818 // On Windows, we need SEH protection
3819 #if defined(_WIN32) && !defined(USE_VECTORED_EXCEPTION_HANDLING)
3820 __try {
3821 #endif
3822 result = jni_DestroyJavaVM_inner(vm);
3823 #if defined(_WIN32) && !defined(USE_VECTORED_EXCEPTION_HANDLING)
3824 } __except(topLevelExceptionFilter((_EXCEPTION_POINTERS*)_exception_info())) {
3825 // Nothing to do.
3826 }
3827 #endif
3828 return result;
3829 }
3830
3831 static jint attach_current_thread(JavaVM *vm, void **penv, void *_args, bool daemon) {
3832 JavaVMAttachArgs *args = (JavaVMAttachArgs *) _args;
3833
3834 // Check below commented out from JDK1.2fcs as well
3835 /*
3836 if (args && (args->version != JNI_VERSION_1_1 || args->version != JNI_VERSION_1_2)) {
3837 return JNI_EVERSION;
3838 }
3839 */
3840
3841 Thread* t = Thread::current_or_null();
3842 if (t != nullptr) {
3843 // If executing from an atexit hook we may be in the VMThread.
3844 if (t->is_Java_thread()) {
3845 // If the thread has been attached this operation is a no-op
3846 *(JNIEnv**)penv = JavaThread::cast(t)->jni_environment();
3847 return JNI_OK;
3848 } else {
3849 return JNI_ERR;
3850 }
3851 }
3852
3853 // Create a thread and mark it as attaching so it will be skipped by the
3854 // ThreadsListEnumerator - see CR 6404306
3855 JavaThread* thread = JavaThread::create_attaching_thread();
3856
3857 // Set correct safepoint info. The thread is going to call into Java when
3858 // initializing the Java level thread object. Hence, the correct state must
3859 // be set in order for the Safepoint code to deal with it correctly.
3860 thread->set_thread_state(_thread_in_vm);
3861 thread->record_stack_base_and_size();
3862 thread->initialize_thread_current();
3863 thread->register_thread_stack_with_NMT();
3864 MACOS_AARCH64_ONLY(thread->init_wx());
3865
3866 if (!os::create_attached_thread(thread)) {
3867 thread->unregister_thread_stack_with_NMT();
3868 thread->smr_delete();
3869 return JNI_ERR;
3870 }
3871 // Enable stack overflow checks
3872 thread->stack_overflow_state()->create_stack_guard_pages();
3873
3874 thread->initialize_tlab();
3875
3876 thread->cache_global_variables();
3877
3878 // Set the _monitor_owner_id to the next thread_id temporarily while initialization runs.
3879 // Do it now before we make this thread visible in Threads::add().
3880 thread->set_monitor_owner_id(ThreadIdentifier::next());
3881
3882 // This thread will not do a safepoint check, since it has
3883 // not been added to the Thread list yet.
3884 { MutexLocker ml(Threads_lock);
3885 // This must be inside this lock in order to get FullGCALot to work properly, i.e., to
3886 // avoid this thread trying to do a GC before it is added to the thread-list
3887 thread->set_active_handles(JNIHandleBlock::allocate_block());
3888 Threads::add(thread, daemon);
3889 }
3890 // Create thread group and name info from attach arguments
3891 oop group = nullptr;
3892 char* thread_name = nullptr;
3893 if (args != nullptr && Threads::is_supported_jni_version(args->version)) {
3894 group = JNIHandles::resolve(args->group);
3895 thread_name = args->name; // may be null
3896 }
3897 if (group == nullptr) group = Universe::main_thread_group();
3898
3899 // Create Java level thread object and attach it to this thread
3900 bool attach_failed = false;
3901 {
3902 EXCEPTION_MARK;
3903 HandleMark hm(THREAD);
3904 Handle thread_group(THREAD, group);
3905 thread->allocate_threadObj(thread_group, thread_name, daemon, THREAD);
3906 if (HAS_PENDING_EXCEPTION) {
3907 CLEAR_PENDING_EXCEPTION;
3908 // cleanup outside the handle mark.
3909 attach_failed = true;
3910 }
3911 }
3912
3913 if (attach_failed) {
3914 // Added missing cleanup
3915 thread->cleanup_failed_attach_current_thread(daemon);
3916 thread->unregister_thread_stack_with_NMT();
3917 thread->smr_delete();
3918 return JNI_ERR;
3919 }
3920
3921 // Update the _monitor_owner_id with the tid value.
3922 thread->set_monitor_owner_id(java_lang_Thread::thread_id(thread->threadObj()));
3923
3924 // Want this inside 'attaching via jni'.
3925 JFR_ONLY(Jfr::on_thread_start(thread);)
3926
3927 // mark the thread as no longer attaching
3928 // this uses a fence to push the change through so we don't have
3929 // to regrab the threads_lock
3930 thread->set_done_attaching_via_jni();
3931
3932 // Set java thread status.
3933 java_lang_Thread::set_thread_status(thread->threadObj(),
3934 JavaThreadStatus::RUNNABLE);
3935
3936 // Notify the debugger
3937 if (JvmtiExport::should_post_thread_life()) {
3938 JvmtiExport::post_thread_start(thread);
3939 }
3940
3941 *(JNIEnv**)penv = thread->jni_environment();
3942
3943 // Now leaving the VM, so change thread_state. This is normally automatically taken care
3944 // of in the JVM_ENTRY. But in this situation we have to do it manually.
3945 ThreadStateTransition::transition_from_vm(thread, _thread_in_native);
3946 MACOS_AARCH64_ONLY(thread->enable_wx(WXExec));
3947
3948 // Perform any platform dependent FPU setup
3949 os::setup_fpu();
3950
3951 return JNI_OK;
3952 }
3953
3954
3955 jint JNICALL jni_AttachCurrentThread(JavaVM *vm, void **penv, void *_args) {
3956 HOTSPOT_JNI_ATTACHCURRENTTHREAD_ENTRY(vm, penv, _args);
3957 if (vm_created == NOT_CREATED) {
3958 // Not sure how we could possibly get here.
3959 HOTSPOT_JNI_ATTACHCURRENTTHREAD_RETURN((uint32_t) JNI_ERR);
3960 return JNI_ERR;
3961 }
3962
3963 jint ret = attach_current_thread(vm, penv, _args, false);
3964 HOTSPOT_JNI_ATTACHCURRENTTHREAD_RETURN(ret);
3965 return ret;
3966 }
3967
3968
3969 jint JNICALL jni_DetachCurrentThread(JavaVM *vm) {
3970 HOTSPOT_JNI_DETACHCURRENTTHREAD_ENTRY(vm);
3971 if (vm_created == NOT_CREATED) {
3972 // Not sure how we could possibly get here.
3973 HOTSPOT_JNI_DETACHCURRENTTHREAD_RETURN(JNI_ERR);
3974 return JNI_ERR;
3975 }
3976
3977 Thread* current = Thread::current_or_null();
3978
3979 // If the thread has already been detached the operation is a no-op
3980 if (current == nullptr) {
3981 HOTSPOT_JNI_DETACHCURRENTTHREAD_RETURN(JNI_OK);
3982 return JNI_OK;
3983 }
3984
3985 // If executing from an atexit hook we may be in the VMThread.
3986 if (!current->is_Java_thread()) {
3987 HOTSPOT_JNI_DETACHCURRENTTHREAD_RETURN((uint32_t) JNI_ERR);
3988 return JNI_ERR;
3989 }
3990
3991 VM_Exit::block_if_vm_exited();
3992
3993 JavaThread* thread = JavaThread::cast(current);
3994 if (thread->has_last_Java_frame()) {
3995 HOTSPOT_JNI_DETACHCURRENTTHREAD_RETURN((uint32_t) JNI_ERR);
3996 // Can't detach a thread that's running java, that can't work.
3997 return JNI_ERR;
3998 }
3999
4000 // We are going to VM, change W^X state to the expected one.
4001 MACOS_AARCH64_ONLY(thread->enable_wx(WXWrite));
4002
4003 // Safepoint support. Have to do call-back to safepoint code, if in the
4004 // middle of a safepoint operation
4005 ThreadStateTransition::transition_from_native(thread, _thread_in_vm);
4006
4007 // XXX: Note that JavaThread::exit() call below removes the guards on the
4008 // stack pages set up via enable_stack_{red,yellow}_zone() calls
4009 // above in jni_AttachCurrentThread. Unfortunately, while the setting
4010 // of the guards is visible in jni_AttachCurrentThread above,
4011 // the removal of the guards is buried below in JavaThread::exit()
4012 // here. The abstraction should be more symmetrically either exposed
4013 // or hidden (e.g. it could probably be hidden in the same
4014 // (platform-dependent) methods where we do alternate stack
4015 // maintenance work?)
4016 thread->exit(false, JavaThread::jni_detach);
4017 thread->unregister_thread_stack_with_NMT();
4018 thread->smr_delete();
4019
4020 // Go to the execute mode, the initial state of the thread on creation.
4021 // Use os interface as the thread is not a JavaThread anymore.
4022 MACOS_AARCH64_ONLY(os::current_thread_enable_wx(WXExec));
4023
4024 HOTSPOT_JNI_DETACHCURRENTTHREAD_RETURN(JNI_OK);
4025 return JNI_OK;
4026 }
4027
4028 DT_RETURN_MARK_DECL(GetEnv, jint
4029 , HOTSPOT_JNI_GETENV_RETURN(_ret_ref));
4030
4031 jint JNICALL jni_GetEnv(JavaVM *vm, void **penv, jint version) {
4032 HOTSPOT_JNI_GETENV_ENTRY(vm, penv, version);
4033 jint ret = JNI_ERR;
4034 DT_RETURN_MARK(GetEnv, jint, (const jint&)ret);
4035
4036 if (vm_created == NOT_CREATED) {
4037 *penv = nullptr;
4038 ret = JNI_EDETACHED;
4039 return ret;
4040 }
4041
4042 if (JniExportedInterface::GetExportedInterface(vm, penv, version, &ret)) {
4043 return ret;
4044 }
4045
4046 #ifndef JVMPI_VERSION_1
4047 // need these in order to be polite about older agents
4048 #define JVMPI_VERSION_1 ((jint)0x10000001)
4049 #define JVMPI_VERSION_1_1 ((jint)0x10000002)
4050 #define JVMPI_VERSION_1_2 ((jint)0x10000003)
4051 #endif // !JVMPI_VERSION_1
4052
4053 Thread* thread = Thread::current_or_null();
4054 if (thread != nullptr && thread->is_Java_thread()) {
4055 if (Threads::is_supported_jni_version_including_1_1(version)) {
4056 *(JNIEnv**)penv = JavaThread::cast(thread)->jni_environment();
4057 ret = JNI_OK;
4058 return ret;
4059
4060 } else if (version == JVMPI_VERSION_1 ||
4061 version == JVMPI_VERSION_1_1 ||
4062 version == JVMPI_VERSION_1_2) {
4063 tty->print_cr("ERROR: JVMPI, an experimental interface, is no longer supported.");
4064 tty->print_cr("Please use the supported interface: the JVM Tool Interface (JVM TI).");
4065 ret = JNI_EVERSION;
4066 return ret;
4067 } else if (JvmtiExport::is_jvmdi_version(version)) {
4068 tty->print_cr("FATAL ERROR: JVMDI is no longer supported.");
4069 tty->print_cr("Please use the supported interface: the JVM Tool Interface (JVM TI).");
4070 ret = JNI_EVERSION;
4071 return ret;
4072 } else {
4073 *penv = nullptr;
4074 ret = JNI_EVERSION;
4075 return ret;
4076 }
4077 } else {
4078 *penv = nullptr;
4079 ret = JNI_EDETACHED;
4080 return ret;
4081 }
4082 }
4083
4084
4085 jint JNICALL jni_AttachCurrentThreadAsDaemon(JavaVM *vm, void **penv, void *_args) {
4086 HOTSPOT_JNI_ATTACHCURRENTTHREADASDAEMON_ENTRY(vm, penv, _args);
4087 if (vm_created == NOT_CREATED) {
4088 // Not sure how we could possibly get here.
4089 HOTSPOT_JNI_ATTACHCURRENTTHREADASDAEMON_RETURN((uint32_t) JNI_ERR);
4090 return JNI_ERR;
4091 }
4092
4093 jint ret = attach_current_thread(vm, penv, _args, true);
4094 HOTSPOT_JNI_ATTACHCURRENTTHREADASDAEMON_RETURN(ret);
4095 return ret;
4096 }
4097
4098
4099 } // End extern "C"
4100
4101 const struct JNIInvokeInterface_ jni_InvokeInterface = {
4102 nullptr,
4103 nullptr,
4104 nullptr,
4105
4106 jni_DestroyJavaVM,
4107 jni_AttachCurrentThread,
4108 jni_DetachCurrentThread,
4109 jni_GetEnv,
4110 jni_AttachCurrentThreadAsDaemon
4111 };