1 /*
2 * Copyright (c) 1997, 2026, Oracle and/or its affiliates. All rights reserved.
3 * Copyright (c) 2012, 2024 Red Hat, Inc.
4 * Copyright (c) 2021, Azul Systems, Inc. All rights reserved.
5 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
6 *
7 * This code is free software; you can redistribute it and/or modify it
8 * under the terms of the GNU General Public License version 2 only, as
9 * published by the Free Software Foundation.
10 *
11 * This code is distributed in the hope that it will be useful, but WITHOUT
12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
14 * version 2 for more details (a copy is included in the LICENSE file that
15 * accompanied this code).
16 *
17 * You should have received a copy of the GNU General Public License version
18 * 2 along with this work; if not, write to the Free Software Foundation,
19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20 *
21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
22 * or visit www.oracle.com if you need additional information or have any
23 * questions.
24 *
25 */
26
27 #include "ci/ciReplay.hpp"
28 #include "classfile/altHashing.hpp"
29 #include "classfile/classFileStream.hpp"
30 #include "classfile/classLoader.hpp"
31 #include "classfile/classLoadInfo.hpp"
32 #include "classfile/javaClasses.inline.hpp"
33 #include "classfile/javaThreadStatus.hpp"
34 #include "classfile/moduleEntry.hpp"
35 #include "classfile/modules.hpp"
36 #include "classfile/symbolTable.hpp"
37 #include "classfile/systemDictionary.hpp"
38 #include "classfile/vmClasses.hpp"
39 #include "classfile/vmSymbols.hpp"
40 #include "compiler/compiler_globals.hpp"
41 #include "gc/shared/collectedHeap.hpp"
42 #include "gc/shared/stringdedup/stringDedup.hpp"
43 #include "interpreter/linkResolver.hpp"
44 #include "jni.h"
45 #include "jvm.h"
46 #include "logging/log.hpp"
47 #include "memory/allocation.inline.hpp"
48 #include "memory/oopFactory.hpp"
49 #include "memory/resourceArea.hpp"
50 #include "memory/universe.hpp"
51 #include "nmt/memTracker.hpp"
52 #include "oops/access.inline.hpp"
53 #include "oops/arrayOop.inline.hpp"
54 #include "oops/flatArrayOop.inline.hpp"
55 #include "oops/inlineKlass.inline.hpp"
56 #include "oops/instanceKlass.inline.hpp"
57 #include "oops/instanceOop.hpp"
58 #include "oops/klass.inline.hpp"
59 #include "oops/markWord.hpp"
60 #include "oops/method.hpp"
61 #include "oops/objArrayKlass.hpp"
62 #include "oops/objArrayOop.inline.hpp"
63 #include "oops/oop.inline.hpp"
64 #include "oops/oopCast.inline.hpp"
65 #include "oops/symbol.hpp"
66 #include "oops/typeArrayKlass.hpp"
67 #include "oops/typeArrayOop.inline.hpp"
68 #include "oops/valuePayload.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/atomicAccess.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 = java_lang_Class::as_InstanceKlass(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 instanceOop i = InstanceKlass::allocate_instance(JNIHandles::resolve_non_null(clazz), CHECK_NULL);
971 ret = JNIHandles::make_local(THREAD, i);
972 return ret;
973 JNI_END
974
975 DT_RETURN_MARK_DECL(NewObjectA, jobject
976 , HOTSPOT_JNI_NEWOBJECTA_RETURN(_ret_ref));
977
978 JNI_ENTRY(jobject, jni_NewObjectA(JNIEnv *env, jclass clazz, jmethodID methodID, const jvalue *args))
979 HOTSPOT_JNI_NEWOBJECTA_ENTRY(env, clazz, (uintptr_t) methodID);
980
981 jobject obj = nullptr;
982 DT_RETURN_MARK(NewObjectA, jobject, (const jobject&)obj);
983
984 instanceOop i = InstanceKlass::allocate_instance(JNIHandles::resolve_non_null(clazz), CHECK_NULL);
985 obj = JNIHandles::make_local(THREAD, i);
986 JavaValue jvalue(T_VOID);
987 JNI_ArgumentPusherArray ap(methodID, args);
988 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_NULL);
989 return obj;
990 JNI_END
991
992
993 DT_RETURN_MARK_DECL(NewObjectV, jobject
994 , HOTSPOT_JNI_NEWOBJECTV_RETURN(_ret_ref));
995
996 JNI_ENTRY(jobject, jni_NewObjectV(JNIEnv *env, jclass clazz, jmethodID methodID, va_list args))
997 HOTSPOT_JNI_NEWOBJECTV_ENTRY(env, clazz, (uintptr_t) methodID);
998
999 jobject obj = nullptr;
1000 DT_RETURN_MARK(NewObjectV, jobject, (const jobject&)obj);
1001
1002 instanceOop i = InstanceKlass::allocate_instance(JNIHandles::resolve_non_null(clazz), CHECK_NULL);
1003 obj = JNIHandles::make_local(THREAD, i);
1004 JavaValue jvalue(T_VOID);
1005 JNI_ArgumentPusherVaArg ap(methodID, args);
1006 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_NULL);
1007 return obj;
1008 JNI_END
1009
1010
1011 DT_RETURN_MARK_DECL(NewObject, jobject
1012 , HOTSPOT_JNI_NEWOBJECT_RETURN(_ret_ref));
1013
1014 JNI_ENTRY(jobject, jni_NewObject(JNIEnv *env, jclass clazz, jmethodID methodID, ...))
1015 HOTSPOT_JNI_NEWOBJECT_ENTRY(env, clazz, (uintptr_t) methodID);
1016
1017 jobject obj = nullptr;
1018 DT_RETURN_MARK(NewObject, jobject, (const jobject&)obj);
1019
1020 instanceOop i = InstanceKlass::allocate_instance(JNIHandles::resolve_non_null(clazz), CHECK_NULL);
1021 obj = JNIHandles::make_local(THREAD, i);
1022 va_list args;
1023 va_start(args, methodID);
1024 JavaValue jvalue(T_VOID);
1025 JNI_ArgumentPusherVaArg ap(methodID, args);
1026 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_NULL);
1027 va_end(args);
1028 return obj;
1029 JNI_END
1030
1031
1032 JNI_ENTRY(jclass, jni_GetObjectClass(JNIEnv *env, jobject obj))
1033 HOTSPOT_JNI_GETOBJECTCLASS_ENTRY(env, obj);
1034
1035 Klass* k = JNIHandles::resolve_non_null(obj)->klass();
1036 jclass ret =
1037 (jclass) JNIHandles::make_local(THREAD, k->java_mirror());
1038
1039 HOTSPOT_JNI_GETOBJECTCLASS_RETURN(ret);
1040 return ret;
1041 JNI_END
1042
1043 JNI_ENTRY_NO_PRESERVE(jboolean, jni_IsInstanceOf(JNIEnv *env, jobject obj, jclass clazz))
1044 HOTSPOT_JNI_ISINSTANCEOF_ENTRY(env, obj, clazz);
1045
1046 jboolean ret = JNI_TRUE;
1047 if (obj != nullptr) {
1048 ret = JNI_FALSE;
1049 Klass* k = java_lang_Class::as_Klass(
1050 JNIHandles::resolve_non_null(clazz));
1051 if (k != nullptr) {
1052 ret = JNIHandles::resolve_non_null(obj)->is_a(k) ? JNI_TRUE : JNI_FALSE;
1053 }
1054 }
1055
1056 HOTSPOT_JNI_ISINSTANCEOF_RETURN(ret);
1057 return ret;
1058 JNI_END
1059
1060
1061 static jmethodID get_method_id(JNIEnv *env, jclass clazz, const char *name_str,
1062 const char *sig, bool is_static, TRAPS) {
1063 // %%%% This code should probably just call into a method in the LinkResolver
1064 //
1065 // The class should have been loaded (we have an instance of the class
1066 // passed in) so the method and signature should already be in the symbol
1067 // table. If they're not there, the method doesn't exist.
1068 const char *name_to_probe = (name_str == nullptr)
1069 ? vmSymbols::object_initializer_name()->as_C_string()
1070 : name_str;
1071 TempNewSymbol name = SymbolTable::probe(name_to_probe, (int)strlen(name_to_probe));
1072 TempNewSymbol signature = SymbolTable::probe(sig, (int)strlen(sig));
1073
1074 if (name == nullptr || signature == nullptr) {
1075 THROW_MSG_NULL(vmSymbols::java_lang_NoSuchMethodError(), name_str);
1076 }
1077
1078 oop mirror = JNIHandles::resolve_non_null(clazz);
1079 Klass* klass = java_lang_Class::as_Klass(mirror);
1080
1081 // Throw a NoSuchMethodError exception if we have an instance of a
1082 // primitive java.lang.Class
1083 if (java_lang_Class::is_primitive(mirror)) {
1084 ResourceMark rm(THREAD);
1085 THROW_MSG_NULL(vmSymbols::java_lang_NoSuchMethodError(), err_msg("%s%s.%s%s", is_static ? "static " : "", klass->signature_name(), name_str, sig));
1086 }
1087
1088 // Make sure class is linked and initialized before handing id's out to
1089 // Method*s.
1090 klass->initialize(CHECK_NULL);
1091
1092 Method* m;
1093 if (name == vmSymbols::object_initializer_name() ||
1094 name == vmSymbols::class_initializer_name()) {
1095 // Never search superclasses for constructors
1096 if (klass->is_instance_klass()) {
1097 m = InstanceKlass::cast(klass)->find_method(name, signature);
1098 } else {
1099 m = nullptr;
1100 }
1101 } else {
1102 m = klass->lookup_method(name, signature);
1103 if (m == nullptr && klass->is_instance_klass()) {
1104 m = InstanceKlass::cast(klass)->lookup_method_in_ordered_interfaces(name, signature);
1105 }
1106 }
1107 if (m == nullptr || (m->is_static() != is_static)) {
1108 ResourceMark rm(THREAD);
1109 THROW_MSG_NULL(vmSymbols::java_lang_NoSuchMethodError(), err_msg("%s%s.%s%s", is_static ? "static " : "", klass->signature_name(), name_str, sig));
1110 }
1111 return m->jmethod_id();
1112 }
1113
1114
1115 JNI_ENTRY(jmethodID, jni_GetMethodID(JNIEnv *env, jclass clazz,
1116 const char *name, const char *sig))
1117 HOTSPOT_JNI_GETMETHODID_ENTRY(env, clazz, (char *) name, (char *) sig);
1118 jmethodID ret = get_method_id(env, clazz, name, sig, false, thread);
1119 HOTSPOT_JNI_GETMETHODID_RETURN((uintptr_t) ret);
1120 return ret;
1121 JNI_END
1122
1123
1124 JNI_ENTRY(jmethodID, jni_GetStaticMethodID(JNIEnv *env, jclass clazz,
1125 const char *name, const char *sig))
1126 HOTSPOT_JNI_GETSTATICMETHODID_ENTRY(env, (char *) clazz, (char *) name, (char *)sig);
1127 jmethodID ret = get_method_id(env, clazz, name, sig, true, thread);
1128 HOTSPOT_JNI_GETSTATICMETHODID_RETURN((uintptr_t) ret);
1129 return ret;
1130 JNI_END
1131
1132
1133
1134 //
1135 // Calling Methods
1136 //
1137
1138
1139 #define DEFINE_CALLMETHOD(ResultType, Result, Tag \
1140 , EntryProbe, ReturnProbe) \
1141 \
1142 DT_RETURN_MARK_DECL_FOR(Result, Call##Result##Method, ResultType \
1143 , ReturnProbe); \
1144 \
1145 JNI_ENTRY(ResultType, \
1146 jni_Call##Result##Method(JNIEnv *env, jobject obj, jmethodID methodID, ...)) \
1147 \
1148 EntryProbe; \
1149 ResultType ret{}; \
1150 DT_RETURN_MARK_FOR(Result, Call##Result##Method, ResultType, \
1151 (const ResultType&)ret);\
1152 \
1153 va_list args; \
1154 va_start(args, methodID); \
1155 JavaValue jvalue(Tag); \
1156 JNI_ArgumentPusherVaArg ap(methodID, args); \
1157 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK_(ResultType{})); \
1158 va_end(args); \
1159 ret = jvalue.get_##ResultType(); \
1160 return ret;\
1161 JNI_END
1162
1163 // the runtime type of subword integral basic types is integer
1164 DEFINE_CALLMETHOD(jboolean, Boolean, T_BOOLEAN
1165 , HOTSPOT_JNI_CALLBOOLEANMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1166 HOTSPOT_JNI_CALLBOOLEANMETHOD_RETURN(_ret_ref))
1167 DEFINE_CALLMETHOD(jbyte, Byte, T_BYTE
1168 , HOTSPOT_JNI_CALLBYTEMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1169 HOTSPOT_JNI_CALLBYTEMETHOD_RETURN(_ret_ref))
1170 DEFINE_CALLMETHOD(jchar, Char, T_CHAR
1171 , HOTSPOT_JNI_CALLCHARMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1172 HOTSPOT_JNI_CALLCHARMETHOD_RETURN(_ret_ref))
1173 DEFINE_CALLMETHOD(jshort, Short, T_SHORT
1174 , HOTSPOT_JNI_CALLSHORTMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1175 HOTSPOT_JNI_CALLSHORTMETHOD_RETURN(_ret_ref))
1176
1177 DEFINE_CALLMETHOD(jobject, Object, T_OBJECT
1178 , HOTSPOT_JNI_CALLOBJECTMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1179 HOTSPOT_JNI_CALLOBJECTMETHOD_RETURN(_ret_ref))
1180 DEFINE_CALLMETHOD(jint, Int, T_INT,
1181 HOTSPOT_JNI_CALLINTMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1182 HOTSPOT_JNI_CALLINTMETHOD_RETURN(_ret_ref))
1183 DEFINE_CALLMETHOD(jlong, Long, T_LONG
1184 , HOTSPOT_JNI_CALLLONGMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1185 HOTSPOT_JNI_CALLLONGMETHOD_RETURN(_ret_ref))
1186 // Float and double probes don't return value because dtrace doesn't currently support it
1187 DEFINE_CALLMETHOD(jfloat, Float, T_FLOAT
1188 , HOTSPOT_JNI_CALLFLOATMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1189 HOTSPOT_JNI_CALLFLOATMETHOD_RETURN())
1190 DEFINE_CALLMETHOD(jdouble, Double, T_DOUBLE
1191 , HOTSPOT_JNI_CALLDOUBLEMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1192 HOTSPOT_JNI_CALLDOUBLEMETHOD_RETURN())
1193
1194 #define DEFINE_CALLMETHODV(ResultType, Result, Tag \
1195 , EntryProbe, ReturnProbe) \
1196 \
1197 DT_RETURN_MARK_DECL_FOR(Result, Call##Result##MethodV, ResultType \
1198 , ReturnProbe); \
1199 \
1200 JNI_ENTRY(ResultType, \
1201 jni_Call##Result##MethodV(JNIEnv *env, jobject obj, jmethodID methodID, va_list args)) \
1202 \
1203 EntryProbe;\
1204 ResultType ret{}; \
1205 DT_RETURN_MARK_FOR(Result, Call##Result##MethodV, ResultType, \
1206 (const ResultType&)ret);\
1207 \
1208 JavaValue jvalue(Tag); \
1209 JNI_ArgumentPusherVaArg ap(methodID, args); \
1210 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK_(ResultType{})); \
1211 ret = jvalue.get_##ResultType(); \
1212 return ret;\
1213 JNI_END
1214
1215 // the runtime type of subword integral basic types is integer
1216 DEFINE_CALLMETHODV(jboolean, Boolean, T_BOOLEAN
1217 , HOTSPOT_JNI_CALLBOOLEANMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1218 HOTSPOT_JNI_CALLBOOLEANMETHODV_RETURN(_ret_ref))
1219 DEFINE_CALLMETHODV(jbyte, Byte, T_BYTE
1220 , HOTSPOT_JNI_CALLBYTEMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1221 HOTSPOT_JNI_CALLBYTEMETHODV_RETURN(_ret_ref))
1222 DEFINE_CALLMETHODV(jchar, Char, T_CHAR
1223 , HOTSPOT_JNI_CALLCHARMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1224 HOTSPOT_JNI_CALLCHARMETHODV_RETURN(_ret_ref))
1225 DEFINE_CALLMETHODV(jshort, Short, T_SHORT
1226 , HOTSPOT_JNI_CALLSHORTMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1227 HOTSPOT_JNI_CALLSHORTMETHODV_RETURN(_ret_ref))
1228
1229 DEFINE_CALLMETHODV(jobject, Object, T_OBJECT
1230 , HOTSPOT_JNI_CALLOBJECTMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1231 HOTSPOT_JNI_CALLOBJECTMETHODV_RETURN(_ret_ref))
1232 DEFINE_CALLMETHODV(jint, Int, T_INT,
1233 HOTSPOT_JNI_CALLINTMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1234 HOTSPOT_JNI_CALLINTMETHODV_RETURN(_ret_ref))
1235 DEFINE_CALLMETHODV(jlong, Long, T_LONG
1236 , HOTSPOT_JNI_CALLLONGMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1237 HOTSPOT_JNI_CALLLONGMETHODV_RETURN(_ret_ref))
1238 // Float and double probes don't return value because dtrace doesn't currently support it
1239 DEFINE_CALLMETHODV(jfloat, Float, T_FLOAT
1240 , HOTSPOT_JNI_CALLFLOATMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1241 HOTSPOT_JNI_CALLFLOATMETHODV_RETURN())
1242 DEFINE_CALLMETHODV(jdouble, Double, T_DOUBLE
1243 , HOTSPOT_JNI_CALLDOUBLEMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1244 HOTSPOT_JNI_CALLDOUBLEMETHODV_RETURN())
1245
1246 #define DEFINE_CALLMETHODA(ResultType, Result, Tag \
1247 , EntryProbe, ReturnProbe) \
1248 \
1249 DT_RETURN_MARK_DECL_FOR(Result, Call##Result##MethodA, ResultType \
1250 , ReturnProbe); \
1251 \
1252 JNI_ENTRY(ResultType, \
1253 jni_Call##Result##MethodA(JNIEnv *env, jobject obj, jmethodID methodID, const jvalue *args)) \
1254 EntryProbe; \
1255 ResultType ret{}; \
1256 DT_RETURN_MARK_FOR(Result, Call##Result##MethodA, ResultType, \
1257 (const ResultType&)ret);\
1258 \
1259 JavaValue jvalue(Tag); \
1260 JNI_ArgumentPusherArray ap(methodID, args); \
1261 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK_(ResultType{})); \
1262 ret = jvalue.get_##ResultType(); \
1263 return ret;\
1264 JNI_END
1265
1266 // the runtime type of subword integral basic types is integer
1267 DEFINE_CALLMETHODA(jboolean, Boolean, T_BOOLEAN
1268 , HOTSPOT_JNI_CALLBOOLEANMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1269 HOTSPOT_JNI_CALLBOOLEANMETHODA_RETURN(_ret_ref))
1270 DEFINE_CALLMETHODA(jbyte, Byte, T_BYTE
1271 , HOTSPOT_JNI_CALLBYTEMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1272 HOTSPOT_JNI_CALLBYTEMETHODA_RETURN(_ret_ref))
1273 DEFINE_CALLMETHODA(jchar, Char, T_CHAR
1274 , HOTSPOT_JNI_CALLCHARMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1275 HOTSPOT_JNI_CALLCHARMETHODA_RETURN(_ret_ref))
1276 DEFINE_CALLMETHODA(jshort, Short, T_SHORT
1277 , HOTSPOT_JNI_CALLSHORTMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1278 HOTSPOT_JNI_CALLSHORTMETHODA_RETURN(_ret_ref))
1279
1280 DEFINE_CALLMETHODA(jobject, Object, T_OBJECT
1281 , HOTSPOT_JNI_CALLOBJECTMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1282 HOTSPOT_JNI_CALLOBJECTMETHODA_RETURN(_ret_ref))
1283 DEFINE_CALLMETHODA(jint, Int, T_INT,
1284 HOTSPOT_JNI_CALLINTMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1285 HOTSPOT_JNI_CALLINTMETHODA_RETURN(_ret_ref))
1286 DEFINE_CALLMETHODA(jlong, Long, T_LONG
1287 , HOTSPOT_JNI_CALLLONGMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1288 HOTSPOT_JNI_CALLLONGMETHODA_RETURN(_ret_ref))
1289 // Float and double probes don't return value because dtrace doesn't currently support it
1290 DEFINE_CALLMETHODA(jfloat, Float, T_FLOAT
1291 , HOTSPOT_JNI_CALLFLOATMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1292 HOTSPOT_JNI_CALLFLOATMETHODA_RETURN())
1293 DEFINE_CALLMETHODA(jdouble, Double, T_DOUBLE
1294 , HOTSPOT_JNI_CALLDOUBLEMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1295 HOTSPOT_JNI_CALLDOUBLEMETHODA_RETURN())
1296
1297 DT_VOID_RETURN_MARK_DECL(CallVoidMethod, HOTSPOT_JNI_CALLVOIDMETHOD_RETURN());
1298 DT_VOID_RETURN_MARK_DECL(CallVoidMethodV, HOTSPOT_JNI_CALLVOIDMETHODV_RETURN());
1299 DT_VOID_RETURN_MARK_DECL(CallVoidMethodA, HOTSPOT_JNI_CALLVOIDMETHODA_RETURN());
1300
1301
1302 JNI_ENTRY(void, jni_CallVoidMethod(JNIEnv *env, jobject obj, jmethodID methodID, ...))
1303 HOTSPOT_JNI_CALLVOIDMETHOD_ENTRY(env, obj, (uintptr_t) methodID);
1304 DT_VOID_RETURN_MARK(CallVoidMethod);
1305
1306 va_list args;
1307 va_start(args, methodID);
1308 JavaValue jvalue(T_VOID);
1309 JNI_ArgumentPusherVaArg ap(methodID, args);
1310 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK);
1311 va_end(args);
1312 JNI_END
1313
1314
1315 JNI_ENTRY(void, jni_CallVoidMethodV(JNIEnv *env, jobject obj, jmethodID methodID, va_list args))
1316 HOTSPOT_JNI_CALLVOIDMETHODV_ENTRY(env, obj, (uintptr_t) methodID);
1317 DT_VOID_RETURN_MARK(CallVoidMethodV);
1318
1319 JavaValue jvalue(T_VOID);
1320 JNI_ArgumentPusherVaArg ap(methodID, args);
1321 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK);
1322 JNI_END
1323
1324
1325 JNI_ENTRY(void, jni_CallVoidMethodA(JNIEnv *env, jobject obj, jmethodID methodID, const jvalue *args))
1326 HOTSPOT_JNI_CALLVOIDMETHODA_ENTRY(env, obj, (uintptr_t) methodID);
1327 DT_VOID_RETURN_MARK(CallVoidMethodA);
1328
1329 JavaValue jvalue(T_VOID);
1330 JNI_ArgumentPusherArray ap(methodID, args);
1331 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK);
1332 JNI_END
1333
1334
1335
1336 #define DEFINE_CALLNONVIRTUALMETHOD(ResultType, Result, Tag \
1337 , EntryProbe, ReturnProbe) \
1338 \
1339 DT_RETURN_MARK_DECL_FOR(Result, CallNonvirtual##Result##Method, ResultType \
1340 , ReturnProbe);\
1341 \
1342 JNI_ENTRY(ResultType, \
1343 jni_CallNonvirtual##Result##Method(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, ...)) \
1344 \
1345 EntryProbe;\
1346 ResultType ret;\
1347 DT_RETURN_MARK_FOR(Result, CallNonvirtual##Result##Method, ResultType, \
1348 (const ResultType&)ret);\
1349 \
1350 va_list args; \
1351 va_start(args, methodID); \
1352 JavaValue jvalue(Tag); \
1353 JNI_ArgumentPusherVaArg ap(methodID, args); \
1354 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_(ResultType{})); \
1355 va_end(args); \
1356 ret = jvalue.get_##ResultType(); \
1357 return ret;\
1358 JNI_END
1359
1360 // the runtime type of subword integral basic types is integer
1361 DEFINE_CALLNONVIRTUALMETHOD(jboolean, Boolean, T_BOOLEAN
1362 , HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1363 HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHOD_RETURN(_ret_ref))
1364 DEFINE_CALLNONVIRTUALMETHOD(jbyte, Byte, T_BYTE
1365 , HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1366 HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHOD_RETURN(_ret_ref))
1367 DEFINE_CALLNONVIRTUALMETHOD(jchar, Char, T_CHAR
1368 , HOTSPOT_JNI_CALLNONVIRTUALCHARMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1369 HOTSPOT_JNI_CALLNONVIRTUALCHARMETHOD_RETURN(_ret_ref))
1370 DEFINE_CALLNONVIRTUALMETHOD(jshort, Short, T_SHORT
1371 , HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1372 HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHOD_RETURN(_ret_ref))
1373
1374 DEFINE_CALLNONVIRTUALMETHOD(jobject, Object, T_OBJECT
1375 , HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1376 HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHOD_RETURN(_ret_ref))
1377 DEFINE_CALLNONVIRTUALMETHOD(jint, Int, T_INT
1378 , HOTSPOT_JNI_CALLNONVIRTUALINTMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1379 HOTSPOT_JNI_CALLNONVIRTUALINTMETHOD_RETURN(_ret_ref))
1380 DEFINE_CALLNONVIRTUALMETHOD(jlong, Long, T_LONG
1381 , HOTSPOT_JNI_CALLNONVIRTUALLONGMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1382 // Float and double probes don't return value because dtrace doesn't currently support it
1383 HOTSPOT_JNI_CALLNONVIRTUALLONGMETHOD_RETURN(_ret_ref))
1384 DEFINE_CALLNONVIRTUALMETHOD(jfloat, Float, T_FLOAT
1385 , HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1386 HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHOD_RETURN())
1387 DEFINE_CALLNONVIRTUALMETHOD(jdouble, Double, T_DOUBLE
1388 , HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1389 HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHOD_RETURN())
1390
1391 #define DEFINE_CALLNONVIRTUALMETHODV(ResultType, Result, Tag \
1392 , EntryProbe, ReturnProbe) \
1393 \
1394 DT_RETURN_MARK_DECL_FOR(Result, CallNonvirtual##Result##MethodV, ResultType \
1395 , ReturnProbe);\
1396 \
1397 JNI_ENTRY(ResultType, \
1398 jni_CallNonvirtual##Result##MethodV(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, va_list args)) \
1399 \
1400 EntryProbe;\
1401 ResultType ret;\
1402 DT_RETURN_MARK_FOR(Result, CallNonvirtual##Result##MethodV, ResultType, \
1403 (const ResultType&)ret);\
1404 \
1405 JavaValue jvalue(Tag); \
1406 JNI_ArgumentPusherVaArg ap(methodID, args); \
1407 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_(ResultType{})); \
1408 ret = jvalue.get_##ResultType(); \
1409 return ret;\
1410 JNI_END
1411
1412 // the runtime type of subword integral basic types is integer
1413 DEFINE_CALLNONVIRTUALMETHODV(jboolean, Boolean, T_BOOLEAN
1414 , HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1415 HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHODV_RETURN(_ret_ref))
1416 DEFINE_CALLNONVIRTUALMETHODV(jbyte, Byte, T_BYTE
1417 , HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1418 HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHODV_RETURN(_ret_ref))
1419 DEFINE_CALLNONVIRTUALMETHODV(jchar, Char, T_CHAR
1420 , HOTSPOT_JNI_CALLNONVIRTUALCHARMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1421 HOTSPOT_JNI_CALLNONVIRTUALCHARMETHODV_RETURN(_ret_ref))
1422 DEFINE_CALLNONVIRTUALMETHODV(jshort, Short, T_SHORT
1423 , HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1424 HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHODV_RETURN(_ret_ref))
1425
1426 DEFINE_CALLNONVIRTUALMETHODV(jobject, Object, T_OBJECT
1427 , HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1428 HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHODV_RETURN(_ret_ref))
1429 DEFINE_CALLNONVIRTUALMETHODV(jint, Int, T_INT
1430 , HOTSPOT_JNI_CALLNONVIRTUALINTMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1431 HOTSPOT_JNI_CALLNONVIRTUALINTMETHODV_RETURN(_ret_ref))
1432 DEFINE_CALLNONVIRTUALMETHODV(jlong, Long, T_LONG
1433 , HOTSPOT_JNI_CALLNONVIRTUALLONGMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1434 // Float and double probes don't return value because dtrace doesn't currently support it
1435 HOTSPOT_JNI_CALLNONVIRTUALLONGMETHODV_RETURN(_ret_ref))
1436 DEFINE_CALLNONVIRTUALMETHODV(jfloat, Float, T_FLOAT
1437 , HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1438 HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHODV_RETURN())
1439 DEFINE_CALLNONVIRTUALMETHODV(jdouble, Double, T_DOUBLE
1440 , HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1441 HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHODV_RETURN())
1442
1443 #define DEFINE_CALLNONVIRTUALMETHODA(ResultType, Result, Tag \
1444 , EntryProbe, ReturnProbe) \
1445 \
1446 DT_RETURN_MARK_DECL_FOR(Result, CallNonvirtual##Result##MethodA, ResultType \
1447 , ReturnProbe);\
1448 \
1449 JNI_ENTRY(ResultType, \
1450 jni_CallNonvirtual##Result##MethodA(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, const jvalue *args)) \
1451 \
1452 EntryProbe;\
1453 ResultType ret;\
1454 DT_RETURN_MARK_FOR(Result, CallNonvirtual##Result##MethodA, ResultType, \
1455 (const ResultType&)ret);\
1456 \
1457 JavaValue jvalue(Tag); \
1458 JNI_ArgumentPusherArray ap(methodID, args); \
1459 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_(ResultType{})); \
1460 ret = jvalue.get_##ResultType(); \
1461 return ret;\
1462 JNI_END
1463
1464 // the runtime type of subword integral basic types is integer
1465 DEFINE_CALLNONVIRTUALMETHODA(jboolean, Boolean, T_BOOLEAN
1466 , HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1467 HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHODA_RETURN(_ret_ref))
1468 DEFINE_CALLNONVIRTUALMETHODA(jbyte, Byte, T_BYTE
1469 , HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1470 HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHODA_RETURN(_ret_ref))
1471 DEFINE_CALLNONVIRTUALMETHODA(jchar, Char, T_CHAR
1472 , HOTSPOT_JNI_CALLNONVIRTUALCHARMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1473 HOTSPOT_JNI_CALLNONVIRTUALCHARMETHODA_RETURN(_ret_ref))
1474 DEFINE_CALLNONVIRTUALMETHODA(jshort, Short, T_SHORT
1475 , HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1476 HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHODA_RETURN(_ret_ref))
1477
1478 DEFINE_CALLNONVIRTUALMETHODA(jobject, Object, T_OBJECT
1479 , HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1480 HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHODA_RETURN(_ret_ref))
1481 DEFINE_CALLNONVIRTUALMETHODA(jint, Int, T_INT
1482 , HOTSPOT_JNI_CALLNONVIRTUALINTMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1483 HOTSPOT_JNI_CALLNONVIRTUALINTMETHODA_RETURN(_ret_ref))
1484 DEFINE_CALLNONVIRTUALMETHODA(jlong, Long, T_LONG
1485 , HOTSPOT_JNI_CALLNONVIRTUALLONGMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1486 // Float and double probes don't return value because dtrace doesn't currently support it
1487 HOTSPOT_JNI_CALLNONVIRTUALLONGMETHODA_RETURN(_ret_ref))
1488 DEFINE_CALLNONVIRTUALMETHODA(jfloat, Float, T_FLOAT
1489 , HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1490 HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHODA_RETURN())
1491 DEFINE_CALLNONVIRTUALMETHODA(jdouble, Double, T_DOUBLE
1492 , HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1493 HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHODA_RETURN())
1494
1495 DT_VOID_RETURN_MARK_DECL(CallNonvirtualVoidMethod
1496 , HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHOD_RETURN());
1497 DT_VOID_RETURN_MARK_DECL(CallNonvirtualVoidMethodV
1498 , HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHODV_RETURN());
1499 DT_VOID_RETURN_MARK_DECL(CallNonvirtualVoidMethodA
1500 , HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHODA_RETURN());
1501
1502 JNI_ENTRY(void, jni_CallNonvirtualVoidMethod(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, ...))
1503 HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHOD_ENTRY(env, obj, cls, (uintptr_t) methodID);
1504 DT_VOID_RETURN_MARK(CallNonvirtualVoidMethod);
1505
1506 va_list args;
1507 va_start(args, methodID);
1508 JavaValue jvalue(T_VOID);
1509 JNI_ArgumentPusherVaArg ap(methodID, args);
1510 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK);
1511 va_end(args);
1512 JNI_END
1513
1514
1515 JNI_ENTRY(void, jni_CallNonvirtualVoidMethodV(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, va_list args))
1516 HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHODV_ENTRY(
1517 env, obj, cls, (uintptr_t) methodID);
1518 DT_VOID_RETURN_MARK(CallNonvirtualVoidMethodV);
1519
1520 JavaValue jvalue(T_VOID);
1521 JNI_ArgumentPusherVaArg ap(methodID, args);
1522 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK);
1523 JNI_END
1524
1525
1526 JNI_ENTRY(void, jni_CallNonvirtualVoidMethodA(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, const jvalue *args))
1527 HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHODA_ENTRY(
1528 env, obj, cls, (uintptr_t) methodID);
1529 DT_VOID_RETURN_MARK(CallNonvirtualVoidMethodA);
1530 JavaValue jvalue(T_VOID);
1531 JNI_ArgumentPusherArray ap(methodID, args);
1532 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK);
1533 JNI_END
1534
1535
1536
1537 #define DEFINE_CALLSTATICMETHOD(ResultType, Result, Tag \
1538 , EntryProbe, ResultProbe) \
1539 \
1540 DT_RETURN_MARK_DECL_FOR(Result, CallStatic##Result##Method, ResultType \
1541 , ResultProbe); \
1542 \
1543 JNI_ENTRY(ResultType, \
1544 jni_CallStatic##Result##Method(JNIEnv *env, jclass cls, jmethodID methodID, ...)) \
1545 \
1546 EntryProbe; \
1547 ResultType ret{}; \
1548 DT_RETURN_MARK_FOR(Result, CallStatic##Result##Method, ResultType, \
1549 (const ResultType&)ret);\
1550 \
1551 va_list args; \
1552 va_start(args, methodID); \
1553 JavaValue jvalue(Tag); \
1554 JNI_ArgumentPusherVaArg ap(methodID, args); \
1555 jni_invoke_static(env, &jvalue, nullptr, JNI_STATIC, methodID, &ap, CHECK_(ResultType{})); \
1556 va_end(args); \
1557 ret = jvalue.get_##ResultType(); \
1558 return ret;\
1559 JNI_END
1560
1561 // the runtime type of subword integral basic types is integer
1562 DEFINE_CALLSTATICMETHOD(jboolean, Boolean, T_BOOLEAN
1563 , HOTSPOT_JNI_CALLSTATICBOOLEANMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1564 HOTSPOT_JNI_CALLSTATICBOOLEANMETHOD_RETURN(_ret_ref));
1565 DEFINE_CALLSTATICMETHOD(jbyte, Byte, T_BYTE
1566 , HOTSPOT_JNI_CALLSTATICBYTEMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1567 HOTSPOT_JNI_CALLSTATICBYTEMETHOD_RETURN(_ret_ref));
1568 DEFINE_CALLSTATICMETHOD(jchar, Char, T_CHAR
1569 , HOTSPOT_JNI_CALLSTATICCHARMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1570 HOTSPOT_JNI_CALLSTATICCHARMETHOD_RETURN(_ret_ref));
1571 DEFINE_CALLSTATICMETHOD(jshort, Short, T_SHORT
1572 , HOTSPOT_JNI_CALLSTATICSHORTMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1573 HOTSPOT_JNI_CALLSTATICSHORTMETHOD_RETURN(_ret_ref));
1574
1575 DEFINE_CALLSTATICMETHOD(jobject, Object, T_OBJECT
1576 , HOTSPOT_JNI_CALLSTATICOBJECTMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1577 HOTSPOT_JNI_CALLSTATICOBJECTMETHOD_RETURN(_ret_ref));
1578 DEFINE_CALLSTATICMETHOD(jint, Int, T_INT
1579 , HOTSPOT_JNI_CALLSTATICINTMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1580 HOTSPOT_JNI_CALLSTATICINTMETHOD_RETURN(_ret_ref));
1581 DEFINE_CALLSTATICMETHOD(jlong, Long, T_LONG
1582 , HOTSPOT_JNI_CALLSTATICLONGMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1583 HOTSPOT_JNI_CALLSTATICLONGMETHOD_RETURN(_ret_ref));
1584 // Float and double probes don't return value because dtrace doesn't currently support it
1585 DEFINE_CALLSTATICMETHOD(jfloat, Float, T_FLOAT
1586 , HOTSPOT_JNI_CALLSTATICFLOATMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1587 HOTSPOT_JNI_CALLSTATICFLOATMETHOD_RETURN());
1588 DEFINE_CALLSTATICMETHOD(jdouble, Double, T_DOUBLE
1589 , HOTSPOT_JNI_CALLSTATICDOUBLEMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1590 HOTSPOT_JNI_CALLSTATICDOUBLEMETHOD_RETURN());
1591
1592 #define DEFINE_CALLSTATICMETHODV(ResultType, Result, Tag \
1593 , EntryProbe, ResultProbe) \
1594 \
1595 DT_RETURN_MARK_DECL_FOR(Result, CallStatic##Result##MethodV, ResultType \
1596 , ResultProbe); \
1597 \
1598 JNI_ENTRY(ResultType, \
1599 jni_CallStatic##Result##MethodV(JNIEnv *env, jclass cls, jmethodID methodID, va_list args)) \
1600 \
1601 EntryProbe; \
1602 ResultType ret{}; \
1603 DT_RETURN_MARK_FOR(Result, CallStatic##Result##MethodV, ResultType, \
1604 (const ResultType&)ret);\
1605 \
1606 JavaValue jvalue(Tag); \
1607 JNI_ArgumentPusherVaArg ap(methodID, args); \
1608 /* Make sure class is initialized before trying to invoke its method */ \
1609 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); \
1610 k->initialize(CHECK_(ResultType{})); \
1611 jni_invoke_static(env, &jvalue, nullptr, JNI_STATIC, methodID, &ap, CHECK_(ResultType{})); \
1612 va_end(args); \
1613 ret = jvalue.get_##ResultType(); \
1614 return ret;\
1615 JNI_END
1616
1617 // the runtime type of subword integral basic types is integer
1618 DEFINE_CALLSTATICMETHODV(jboolean, Boolean, T_BOOLEAN
1619 , HOTSPOT_JNI_CALLSTATICBOOLEANMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1620 HOTSPOT_JNI_CALLSTATICBOOLEANMETHODV_RETURN(_ret_ref));
1621 DEFINE_CALLSTATICMETHODV(jbyte, Byte, T_BYTE
1622 , HOTSPOT_JNI_CALLSTATICBYTEMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1623 HOTSPOT_JNI_CALLSTATICBYTEMETHODV_RETURN(_ret_ref));
1624 DEFINE_CALLSTATICMETHODV(jchar, Char, T_CHAR
1625 , HOTSPOT_JNI_CALLSTATICCHARMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1626 HOTSPOT_JNI_CALLSTATICCHARMETHODV_RETURN(_ret_ref));
1627 DEFINE_CALLSTATICMETHODV(jshort, Short, T_SHORT
1628 , HOTSPOT_JNI_CALLSTATICSHORTMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1629 HOTSPOT_JNI_CALLSTATICSHORTMETHODV_RETURN(_ret_ref));
1630
1631 DEFINE_CALLSTATICMETHODV(jobject, Object, T_OBJECT
1632 , HOTSPOT_JNI_CALLSTATICOBJECTMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1633 HOTSPOT_JNI_CALLSTATICOBJECTMETHODV_RETURN(_ret_ref));
1634 DEFINE_CALLSTATICMETHODV(jint, Int, T_INT
1635 , HOTSPOT_JNI_CALLSTATICINTMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1636 HOTSPOT_JNI_CALLSTATICINTMETHODV_RETURN(_ret_ref));
1637 DEFINE_CALLSTATICMETHODV(jlong, Long, T_LONG
1638 , HOTSPOT_JNI_CALLSTATICLONGMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1639 HOTSPOT_JNI_CALLSTATICLONGMETHODV_RETURN(_ret_ref));
1640 // Float and double probes don't return value because dtrace doesn't currently support it
1641 DEFINE_CALLSTATICMETHODV(jfloat, Float, T_FLOAT
1642 , HOTSPOT_JNI_CALLSTATICFLOATMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1643 HOTSPOT_JNI_CALLSTATICFLOATMETHODV_RETURN());
1644 DEFINE_CALLSTATICMETHODV(jdouble, Double, T_DOUBLE
1645 , HOTSPOT_JNI_CALLSTATICDOUBLEMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1646 HOTSPOT_JNI_CALLSTATICDOUBLEMETHODV_RETURN());
1647
1648 #define DEFINE_CALLSTATICMETHODA(ResultType, Result, Tag \
1649 , EntryProbe, ResultProbe) \
1650 \
1651 DT_RETURN_MARK_DECL_FOR(Result, CallStatic##Result##MethodA, ResultType \
1652 , ResultProbe); \
1653 \
1654 JNI_ENTRY(ResultType, \
1655 jni_CallStatic##Result##MethodA(JNIEnv *env, jclass cls, jmethodID methodID, const jvalue *args)) \
1656 \
1657 EntryProbe; \
1658 ResultType ret{}; \
1659 DT_RETURN_MARK_FOR(Result, CallStatic##Result##MethodA, ResultType, \
1660 (const ResultType&)ret);\
1661 \
1662 JavaValue jvalue(Tag); \
1663 JNI_ArgumentPusherArray ap(methodID, args); \
1664 jni_invoke_static(env, &jvalue, nullptr, JNI_STATIC, methodID, &ap, CHECK_(ResultType{})); \
1665 ret = jvalue.get_##ResultType(); \
1666 return ret;\
1667 JNI_END
1668
1669 // the runtime type of subword integral basic types is integer
1670 DEFINE_CALLSTATICMETHODA(jboolean, Boolean, T_BOOLEAN
1671 , HOTSPOT_JNI_CALLSTATICBOOLEANMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1672 HOTSPOT_JNI_CALLSTATICBOOLEANMETHODA_RETURN(_ret_ref));
1673 DEFINE_CALLSTATICMETHODA(jbyte, Byte, T_BYTE
1674 , HOTSPOT_JNI_CALLSTATICBYTEMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1675 HOTSPOT_JNI_CALLSTATICBYTEMETHODA_RETURN(_ret_ref));
1676 DEFINE_CALLSTATICMETHODA(jchar, Char, T_CHAR
1677 , HOTSPOT_JNI_CALLSTATICCHARMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1678 HOTSPOT_JNI_CALLSTATICCHARMETHODA_RETURN(_ret_ref));
1679 DEFINE_CALLSTATICMETHODA(jshort, Short, T_SHORT
1680 , HOTSPOT_JNI_CALLSTATICSHORTMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1681 HOTSPOT_JNI_CALLSTATICSHORTMETHODA_RETURN(_ret_ref));
1682
1683 DEFINE_CALLSTATICMETHODA(jobject, Object, T_OBJECT
1684 , HOTSPOT_JNI_CALLSTATICOBJECTMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1685 HOTSPOT_JNI_CALLSTATICOBJECTMETHODA_RETURN(_ret_ref));
1686 DEFINE_CALLSTATICMETHODA(jint, Int, T_INT
1687 , HOTSPOT_JNI_CALLSTATICINTMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1688 HOTSPOT_JNI_CALLSTATICINTMETHODA_RETURN(_ret_ref));
1689 DEFINE_CALLSTATICMETHODA(jlong, Long, T_LONG
1690 , HOTSPOT_JNI_CALLSTATICLONGMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1691 HOTSPOT_JNI_CALLSTATICLONGMETHODA_RETURN(_ret_ref));
1692 // Float and double probes don't return value because dtrace doesn't currently support it
1693 DEFINE_CALLSTATICMETHODA(jfloat, Float, T_FLOAT
1694 , HOTSPOT_JNI_CALLSTATICFLOATMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1695 HOTSPOT_JNI_CALLSTATICFLOATMETHODA_RETURN());
1696 DEFINE_CALLSTATICMETHODA(jdouble, Double, T_DOUBLE
1697 , HOTSPOT_JNI_CALLSTATICDOUBLEMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1698 HOTSPOT_JNI_CALLSTATICDOUBLEMETHODA_RETURN());
1699
1700 DT_VOID_RETURN_MARK_DECL(CallStaticVoidMethod
1701 , HOTSPOT_JNI_CALLSTATICVOIDMETHOD_RETURN());
1702 DT_VOID_RETURN_MARK_DECL(CallStaticVoidMethodV
1703 , HOTSPOT_JNI_CALLSTATICVOIDMETHODV_RETURN());
1704 DT_VOID_RETURN_MARK_DECL(CallStaticVoidMethodA
1705 , HOTSPOT_JNI_CALLSTATICVOIDMETHODA_RETURN());
1706
1707 JNI_ENTRY(void, jni_CallStaticVoidMethod(JNIEnv *env, jclass cls, jmethodID methodID, ...))
1708 HOTSPOT_JNI_CALLSTATICVOIDMETHOD_ENTRY(env, cls, (uintptr_t) methodID);
1709 DT_VOID_RETURN_MARK(CallStaticVoidMethod);
1710
1711 va_list args;
1712 va_start(args, methodID);
1713 JavaValue jvalue(T_VOID);
1714 JNI_ArgumentPusherVaArg ap(methodID, args);
1715 jni_invoke_static(env, &jvalue, nullptr, JNI_STATIC, methodID, &ap, CHECK);
1716 va_end(args);
1717 JNI_END
1718
1719
1720 JNI_ENTRY(void, jni_CallStaticVoidMethodV(JNIEnv *env, jclass cls, jmethodID methodID, va_list args))
1721 HOTSPOT_JNI_CALLSTATICVOIDMETHODV_ENTRY(env, cls, (uintptr_t) methodID);
1722 DT_VOID_RETURN_MARK(CallStaticVoidMethodV);
1723
1724 JavaValue jvalue(T_VOID);
1725 JNI_ArgumentPusherVaArg ap(methodID, args);
1726 jni_invoke_static(env, &jvalue, nullptr, JNI_STATIC, methodID, &ap, CHECK);
1727 JNI_END
1728
1729
1730 JNI_ENTRY(void, jni_CallStaticVoidMethodA(JNIEnv *env, jclass cls, jmethodID methodID, const jvalue *args))
1731 HOTSPOT_JNI_CALLSTATICVOIDMETHODA_ENTRY(env, cls, (uintptr_t) methodID);
1732 DT_VOID_RETURN_MARK(CallStaticVoidMethodA);
1733
1734 JavaValue jvalue(T_VOID);
1735 JNI_ArgumentPusherArray ap(methodID, args);
1736 jni_invoke_static(env, &jvalue, nullptr, JNI_STATIC, methodID, &ap, CHECK);
1737 JNI_END
1738
1739
1740 //
1741 // Accessing Fields
1742 //
1743
1744
1745 DT_RETURN_MARK_DECL(GetFieldID, jfieldID
1746 , HOTSPOT_JNI_GETFIELDID_RETURN((uintptr_t)_ret_ref));
1747
1748 JNI_ENTRY(jfieldID, jni_GetFieldID(JNIEnv *env, jclass clazz,
1749 const char *name, const char *sig))
1750 HOTSPOT_JNI_GETFIELDID_ENTRY(env, clazz, (char *) name, (char *) sig);
1751 jfieldID ret = nullptr;
1752 DT_RETURN_MARK(GetFieldID, jfieldID, (const jfieldID&)ret);
1753
1754 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz));
1755
1756 // The class should have been loaded (we have an instance of the class
1757 // passed in) so the field and signature should already be in the symbol
1758 // table. If they're not there, the field doesn't exist.
1759 TempNewSymbol fieldname = SymbolTable::probe(name, (int)strlen(name));
1760 TempNewSymbol signame = SymbolTable::probe(sig, (int)strlen(sig));
1761 if (fieldname == nullptr || signame == nullptr) {
1762 ResourceMark rm;
1763 THROW_MSG_NULL(vmSymbols::java_lang_NoSuchFieldError(), err_msg("%s.%s %s", k->external_name(), name, sig));
1764 }
1765
1766 // Make sure class is initialized before handing id's out to fields
1767 k->initialize(CHECK_NULL);
1768
1769 fieldDescriptor fd;
1770 if (!k->is_instance_klass() ||
1771 !InstanceKlass::cast(k)->find_field(fieldname, signame, false, &fd)) {
1772 ResourceMark rm;
1773 THROW_MSG_NULL(vmSymbols::java_lang_NoSuchFieldError(), err_msg("%s.%s %s", k->external_name(), name, sig));
1774 }
1775
1776 // A jfieldID for a non-static field is simply the offset of the field within the instanceOop
1777 // It may also have hash bits for k, if VerifyJNIFields is turned on.
1778 ret = jfieldIDWorkaround::to_instance_jfieldID(k, fd.offset(), fd.is_flat());
1779 return ret;
1780 JNI_END
1781
1782
1783 JNI_ENTRY(jobject, jni_GetObjectField(JNIEnv *env, jobject obj, jfieldID fieldID))
1784 HOTSPOT_JNI_GETOBJECTFIELD_ENTRY(env, obj, (uintptr_t) fieldID);
1785 oop o = JNIHandles::resolve_non_null(obj);
1786 Klass* k = o->klass();
1787 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID);
1788 oop res = nullptr;
1789 // Keep JVMTI addition small and only check enabled flag here.
1790 // jni_GetField_probe() assumes that is okay to create handles.
1791 if (JvmtiExport::should_post_field_access()) {
1792 o = JvmtiExport::jni_GetField_probe(thread, obj, o, k, fieldID, false);
1793 }
1794 if (!jfieldIDWorkaround::is_flat_jfieldID(fieldID)) {
1795 res = HeapAccess<ON_UNKNOWN_OOP_REF>::oop_load_at(o, offset);
1796 } else {
1797 InstanceKlass* ik = InstanceKlass::cast(k);
1798 fieldDescriptor fd;
1799 bool found = ik->find_field_from_offset(offset, false, &fd); // performance bottleneck
1800 assert(found, "Field not found");
1801 FlatFieldPayload payload(instanceOop(o), &fd);
1802 res = payload.read(CHECK_NULL);
1803 }
1804 jobject ret = JNIHandles::make_local(THREAD, res);
1805 HOTSPOT_JNI_GETOBJECTFIELD_RETURN(ret);
1806 return ret;
1807 JNI_END
1808
1809
1810
1811 #define DEFINE_GETFIELD(Return,Fieldname,Result \
1812 , EntryProbe, ReturnProbe) \
1813 \
1814 DT_RETURN_MARK_DECL_FOR(Result, Get##Result##Field, Return \
1815 , ReturnProbe); \
1816 \
1817 JNI_ENTRY_NO_PRESERVE(Return, jni_Get##Result##Field(JNIEnv *env, jobject obj, jfieldID fieldID)) \
1818 \
1819 EntryProbe; \
1820 Return ret = 0;\
1821 DT_RETURN_MARK_FOR(Result, Get##Result##Field, Return, (const Return&)ret);\
1822 \
1823 oop o = JNIHandles::resolve_non_null(obj); \
1824 Klass* k = o->klass(); \
1825 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID); \
1826 /* Keep JVMTI addition small and only check enabled flag here. */ \
1827 if (JvmtiExport::should_post_field_access()) { \
1828 o = JvmtiExport::jni_GetField_probe(thread, obj, o, k, fieldID, false); \
1829 } \
1830 ret = o->Fieldname##_field(offset); \
1831 return ret; \
1832 JNI_END
1833
1834 DEFINE_GETFIELD(jboolean, bool, Boolean
1835 , HOTSPOT_JNI_GETBOOLEANFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
1836 HOTSPOT_JNI_GETBOOLEANFIELD_RETURN(_ret_ref))
1837 DEFINE_GETFIELD(jbyte, byte, Byte
1838 , HOTSPOT_JNI_GETBYTEFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
1839 HOTSPOT_JNI_GETBYTEFIELD_RETURN(_ret_ref))
1840 DEFINE_GETFIELD(jchar, char, Char
1841 , HOTSPOT_JNI_GETCHARFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
1842 HOTSPOT_JNI_GETCHARFIELD_RETURN(_ret_ref))
1843 DEFINE_GETFIELD(jshort, short, Short
1844 , HOTSPOT_JNI_GETSHORTFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
1845 HOTSPOT_JNI_GETSHORTFIELD_RETURN(_ret_ref))
1846 DEFINE_GETFIELD(jint, int, Int
1847 , HOTSPOT_JNI_GETINTFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
1848 HOTSPOT_JNI_GETINTFIELD_RETURN(_ret_ref))
1849 DEFINE_GETFIELD(jlong, long, Long
1850 , HOTSPOT_JNI_GETLONGFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
1851 HOTSPOT_JNI_GETLONGFIELD_RETURN(_ret_ref))
1852 // Float and double probes don't return value because dtrace doesn't currently support it
1853 DEFINE_GETFIELD(jfloat, float, Float
1854 , HOTSPOT_JNI_GETFLOATFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
1855 HOTSPOT_JNI_GETFLOATFIELD_RETURN())
1856 DEFINE_GETFIELD(jdouble, double, Double
1857 , HOTSPOT_JNI_GETDOUBLEFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
1858 HOTSPOT_JNI_GETDOUBLEFIELD_RETURN())
1859
1860 address jni_GetBooleanField_addr() {
1861 return (address)jni_GetBooleanField;
1862 }
1863 address jni_GetByteField_addr() {
1864 return (address)jni_GetByteField;
1865 }
1866 address jni_GetCharField_addr() {
1867 return (address)jni_GetCharField;
1868 }
1869 address jni_GetShortField_addr() {
1870 return (address)jni_GetShortField;
1871 }
1872 address jni_GetIntField_addr() {
1873 return (address)jni_GetIntField;
1874 }
1875 address jni_GetLongField_addr() {
1876 return (address)jni_GetLongField;
1877 }
1878 address jni_GetFloatField_addr() {
1879 return (address)jni_GetFloatField;
1880 }
1881 address jni_GetDoubleField_addr() {
1882 return (address)jni_GetDoubleField;
1883 }
1884
1885 static void log_debug_if_final_static_field(JavaThread* current, const char* func_name, InstanceKlass* ik, int offset) {
1886 if (log_is_enabled(Debug, jni)) {
1887 fieldDescriptor fd;
1888 bool found = ik->find_field_from_offset(offset, true, &fd);
1889 assert(found, "bad field offset");
1890 assert(fd.is_static(), "static/instance mismatch");
1891 if (fd.is_final() && !fd.is_mutable_static_final()) {
1892 ResourceMark rm(current);
1893 log_debug(jni)("%s mutated final static field %s.%s", func_name, ik->external_name(), fd.name()->as_C_string());
1894 }
1895 }
1896 }
1897
1898 static void log_debug_if_final_instance_field(JavaThread* current, const char* func_name, InstanceKlass* ik, int offset) {
1899 if (log_is_enabled(Debug, jni)) {
1900 fieldDescriptor fd;
1901 bool found = ik->find_field_from_offset(offset, false, &fd);
1902 assert(found, "bad field offset");
1903 assert(!fd.is_static(), "static/instance mismatch");
1904 if (fd.is_final()) {
1905 ResourceMark rm(current);
1906 log_debug(jni)("%s mutated final instance field %s.%s", func_name, ik->external_name(), fd.name()->as_C_string());
1907 }
1908 }
1909 }
1910
1911 JNI_ENTRY_NO_PRESERVE(void, jni_SetObjectField(JNIEnv *env, jobject obj, jfieldID fieldID, jobject value))
1912 HOTSPOT_JNI_SETOBJECTFIELD_ENTRY(env, obj, (uintptr_t) fieldID, value);
1913 oop o = JNIHandles::resolve_non_null(obj);
1914 Klass* k = o->klass();
1915 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID);
1916 // Keep JVMTI addition small and only check enabled flag here.
1917 if (JvmtiExport::should_post_field_modification()) {
1918 jvalue field_value;
1919 field_value.l = value;
1920 o = JvmtiExport::jni_SetField_probe(thread, obj, o, k, fieldID, false, JVM_SIGNATURE_CLASS, (jvalue *)&field_value);
1921 }
1922 if (!jfieldIDWorkaround::is_flat_jfieldID(fieldID)) {
1923 oop v = JNIHandles::resolve(value);
1924 if (v == nullptr) {
1925 InstanceKlass *ik = InstanceKlass::cast(k);
1926 fieldDescriptor fd;
1927 ik->find_field_from_offset(offset, false, &fd);
1928 if (fd.is_null_free_inline_type()) {
1929 THROW_MSG(vmSymbols::java_lang_NullPointerException(), "Cannot store null in a null-restricted field");
1930 }
1931 }
1932 HeapAccess<ON_UNKNOWN_OOP_REF>::oop_store_at(o, offset, v);
1933 } else {
1934 assert(k->is_instance_klass(), "Only instances can have flat fields");
1935 InstanceKlass* ik = InstanceKlass::cast(k);
1936 fieldDescriptor fd;
1937 bool found = ik->find_field_from_offset(offset, false, &fd);
1938 assert(found, "Field not found");
1939 FlatFieldPayload payload(instanceOop(o), &fd);
1940 payload.write(inlineOop(JNIHandles::resolve(value)), CHECK);
1941 }
1942 log_debug_if_final_instance_field(thread, "SetObjectField", InstanceKlass::cast(k), offset);
1943 HOTSPOT_JNI_SETOBJECTFIELD_RETURN();
1944 JNI_END
1945
1946 // TODO: make this a template
1947
1948 #define DEFINE_SETFIELD(Argument,Fieldname,Result,SigType,unionType \
1949 , EntryProbe, ReturnProbe) \
1950 \
1951 JNI_ENTRY_NO_PRESERVE(void, jni_Set##Result##Field(JNIEnv *env, jobject obj, jfieldID fieldID, Argument value)) \
1952 \
1953 EntryProbe; \
1954 \
1955 oop o = JNIHandles::resolve_non_null(obj); \
1956 Klass* k = o->klass(); \
1957 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID); \
1958 /* Keep JVMTI addition small and only check enabled flag here. */ \
1959 if (JvmtiExport::should_post_field_modification()) { \
1960 jvalue field_value; \
1961 field_value.unionType = value; \
1962 o = JvmtiExport::jni_SetField_probe(thread, obj, o, k, fieldID, false, SigType, (jvalue *)&field_value); \
1963 } \
1964 o->Fieldname##_field_put(offset, value); \
1965 log_debug_if_final_instance_field(thread, "Set<Type>Field", InstanceKlass::cast(k), offset); \
1966 ReturnProbe; \
1967 JNI_END
1968
1969 DEFINE_SETFIELD(jboolean, bool, Boolean, JVM_SIGNATURE_BOOLEAN, z
1970 , HOTSPOT_JNI_SETBOOLEANFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value),
1971 HOTSPOT_JNI_SETBOOLEANFIELD_RETURN())
1972 DEFINE_SETFIELD(jbyte, byte, Byte, JVM_SIGNATURE_BYTE, b
1973 , HOTSPOT_JNI_SETBYTEFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value),
1974 HOTSPOT_JNI_SETBYTEFIELD_RETURN())
1975 DEFINE_SETFIELD(jchar, char, Char, JVM_SIGNATURE_CHAR, c
1976 , HOTSPOT_JNI_SETCHARFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value),
1977 HOTSPOT_JNI_SETCHARFIELD_RETURN())
1978 DEFINE_SETFIELD(jshort, short, Short, JVM_SIGNATURE_SHORT, s
1979 , HOTSPOT_JNI_SETSHORTFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value),
1980 HOTSPOT_JNI_SETSHORTFIELD_RETURN())
1981 DEFINE_SETFIELD(jint, int, Int, JVM_SIGNATURE_INT, i
1982 , HOTSPOT_JNI_SETINTFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value),
1983 HOTSPOT_JNI_SETINTFIELD_RETURN())
1984 DEFINE_SETFIELD(jlong, long, Long, JVM_SIGNATURE_LONG, j
1985 , HOTSPOT_JNI_SETLONGFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value),
1986 HOTSPOT_JNI_SETLONGFIELD_RETURN())
1987 // Float and double probes don't return value because dtrace doesn't currently support it
1988 DEFINE_SETFIELD(jfloat, float, Float, JVM_SIGNATURE_FLOAT, f
1989 , HOTSPOT_JNI_SETFLOATFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
1990 HOTSPOT_JNI_SETFLOATFIELD_RETURN())
1991 DEFINE_SETFIELD(jdouble, double, Double, JVM_SIGNATURE_DOUBLE, d
1992 , HOTSPOT_JNI_SETDOUBLEFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
1993 HOTSPOT_JNI_SETDOUBLEFIELD_RETURN())
1994
1995 DT_RETURN_MARK_DECL(ToReflectedField, jobject
1996 , HOTSPOT_JNI_TOREFLECTEDFIELD_RETURN(_ret_ref));
1997
1998 JNI_ENTRY(jobject, jni_ToReflectedField(JNIEnv *env, jclass cls, jfieldID fieldID, jboolean isStatic))
1999 HOTSPOT_JNI_TOREFLECTEDFIELD_ENTRY(env, cls, (uintptr_t) fieldID, isStatic);
2000 jobject ret = nullptr;
2001 DT_RETURN_MARK(ToReflectedField, jobject, (const jobject&)ret);
2002
2003 fieldDescriptor fd;
2004 bool found = false;
2005 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2006
2007 assert(jfieldIDWorkaround::is_static_jfieldID(fieldID) == (isStatic != 0), "invalid fieldID");
2008
2009 if (isStatic) {
2010 // Static field. The fieldID a JNIid specifying the field holder and the offset within the Klass*.
2011 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID);
2012 assert(id->is_static_field_id(), "invalid static field id");
2013 found = id->find_local_field(&fd);
2014 } else {
2015 // Non-static field. The fieldID is really the offset of the field within the instanceOop.
2016 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID);
2017 found = InstanceKlass::cast(k)->find_field_from_offset(offset, false, &fd);
2018 }
2019 assert(found, "bad fieldID passed into jni_ToReflectedField");
2020 oop reflected = Reflection::new_field(&fd, CHECK_NULL);
2021 ret = JNIHandles::make_local(THREAD, reflected);
2022 return ret;
2023 JNI_END
2024
2025
2026 //
2027 // Accessing Static Fields
2028 //
2029 DT_RETURN_MARK_DECL(GetStaticFieldID, jfieldID
2030 , HOTSPOT_JNI_GETSTATICFIELDID_RETURN((uintptr_t)_ret_ref));
2031
2032 JNI_ENTRY(jfieldID, jni_GetStaticFieldID(JNIEnv *env, jclass clazz,
2033 const char *name, const char *sig))
2034 HOTSPOT_JNI_GETSTATICFIELDID_ENTRY(env, clazz, (char *) name, (char *) sig);
2035 jfieldID ret = nullptr;
2036 DT_RETURN_MARK(GetStaticFieldID, jfieldID, (const jfieldID&)ret);
2037
2038 // The class should have been loaded (we have an instance of the class
2039 // passed in) so the field and signature should already be in the symbol
2040 // table. If they're not there, the field doesn't exist.
2041 TempNewSymbol fieldname = SymbolTable::probe(name, (int)strlen(name));
2042 TempNewSymbol signame = SymbolTable::probe(sig, (int)strlen(sig));
2043 if (fieldname == nullptr || signame == nullptr) {
2044 THROW_MSG_NULL(vmSymbols::java_lang_NoSuchFieldError(), (char*) name);
2045 }
2046 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz));
2047 // Make sure class is initialized before handing id's out to static fields
2048 k->initialize(CHECK_NULL);
2049
2050 fieldDescriptor fd;
2051 if (!k->is_instance_klass() ||
2052 !InstanceKlass::cast(k)->find_field(fieldname, signame, true, &fd)) {
2053 THROW_MSG_NULL(vmSymbols::java_lang_NoSuchFieldError(), (char*) name);
2054 }
2055
2056 // A jfieldID for a static field is a JNIid specifying the field holder and the offset within the Klass*
2057 JNIid* id = fd.field_holder()->jni_id_for(fd.offset());
2058 DEBUG_ONLY(id->set_is_static_field_id();)
2059
2060 DEBUG_ONLY(id->verify(fd.field_holder()));
2061
2062 ret = jfieldIDWorkaround::to_static_jfieldID(id);
2063 return ret;
2064 JNI_END
2065
2066
2067 JNI_ENTRY(jobject, jni_GetStaticObjectField(JNIEnv *env, jclass clazz, jfieldID fieldID))
2068 HOTSPOT_JNI_GETSTATICOBJECTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID);
2069 #if INCLUDE_JNI_CHECK
2070 DEBUG_ONLY(Klass* param_k = jniCheck::validate_class(thread, clazz);)
2071 #endif // INCLUDE_JNI_CHECK
2072 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID);
2073 assert(id->is_static_field_id(), "invalid static field id");
2074 // Keep JVMTI addition small and only check enabled flag here.
2075 // jni_GetField_probe() assumes that is okay to create handles.
2076 if (JvmtiExport::should_post_field_access()) {
2077 JvmtiExport::jni_GetField_probe(thread, nullptr, nullptr, id->holder(), fieldID, true);
2078 }
2079 jobject ret = JNIHandles::make_local(THREAD, id->holder()->java_mirror()->obj_field(id->offset()));
2080 HOTSPOT_JNI_GETSTATICOBJECTFIELD_RETURN(ret);
2081 return ret;
2082 JNI_END
2083
2084
2085 #define DEFINE_GETSTATICFIELD(Return,Fieldname,Result \
2086 , EntryProbe, ReturnProbe) \
2087 \
2088 DT_RETURN_MARK_DECL_FOR(Result, GetStatic##Result##Field, Return \
2089 , ReturnProbe); \
2090 \
2091 JNI_ENTRY(Return, jni_GetStatic##Result##Field(JNIEnv *env, jclass clazz, jfieldID fieldID)) \
2092 EntryProbe; \
2093 Return ret = 0;\
2094 DT_RETURN_MARK_FOR(Result, GetStatic##Result##Field, Return, \
2095 (const Return&)ret);\
2096 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID); \
2097 assert(id->is_static_field_id(), "invalid static field id"); \
2098 /* Keep JVMTI addition small and only check enabled flag here. */ \
2099 /* jni_GetField_probe() assumes that is okay to create handles. */ \
2100 if (JvmtiExport::should_post_field_access()) { \
2101 JvmtiExport::jni_GetField_probe(thread, nullptr, nullptr, id->holder(), fieldID, true); \
2102 } \
2103 ret = id->holder()->java_mirror()-> Fieldname##_field (id->offset()); \
2104 return ret;\
2105 JNI_END
2106
2107 DEFINE_GETSTATICFIELD(jboolean, bool, Boolean
2108 , HOTSPOT_JNI_GETSTATICBOOLEANFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICBOOLEANFIELD_RETURN(_ret_ref))
2109 DEFINE_GETSTATICFIELD(jbyte, byte, Byte
2110 , HOTSPOT_JNI_GETSTATICBYTEFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICBYTEFIELD_RETURN(_ret_ref) )
2111 DEFINE_GETSTATICFIELD(jchar, char, Char
2112 , HOTSPOT_JNI_GETSTATICCHARFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICCHARFIELD_RETURN(_ret_ref) )
2113 DEFINE_GETSTATICFIELD(jshort, short, Short
2114 , HOTSPOT_JNI_GETSTATICSHORTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICSHORTFIELD_RETURN(_ret_ref) )
2115 DEFINE_GETSTATICFIELD(jint, int, Int
2116 , HOTSPOT_JNI_GETSTATICINTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICINTFIELD_RETURN(_ret_ref) )
2117 DEFINE_GETSTATICFIELD(jlong, long, Long
2118 , HOTSPOT_JNI_GETSTATICLONGFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICLONGFIELD_RETURN(_ret_ref) )
2119 // Float and double probes don't return value because dtrace doesn't currently support it
2120 DEFINE_GETSTATICFIELD(jfloat, float, Float
2121 , HOTSPOT_JNI_GETSTATICFLOATFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICFLOATFIELD_RETURN() )
2122 DEFINE_GETSTATICFIELD(jdouble, double, Double
2123 , HOTSPOT_JNI_GETSTATICDOUBLEFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICDOUBLEFIELD_RETURN() )
2124
2125 JNI_ENTRY(void, jni_SetStaticObjectField(JNIEnv *env, jclass clazz, jfieldID fieldID, jobject value))
2126 HOTSPOT_JNI_SETSTATICOBJECTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value);
2127 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID);
2128 assert(id->is_static_field_id(), "invalid static field id");
2129 // Keep JVMTI addition small and only check enabled flag here.
2130 // jni_SetField_probe() assumes that is okay to create handles.
2131 if (JvmtiExport::should_post_field_modification()) {
2132 jvalue field_value;
2133 field_value.l = value;
2134 JvmtiExport::jni_SetField_probe(thread, nullptr, nullptr, id->holder(), fieldID, true, JVM_SIGNATURE_CLASS, (jvalue *)&field_value);
2135 }
2136 id->holder()->java_mirror()->obj_field_put(id->offset(), JNIHandles::resolve(value));
2137 log_debug_if_final_static_field(THREAD, "SetStaticObjectField", id->holder(), id->offset());
2138 HOTSPOT_JNI_SETSTATICOBJECTFIELD_RETURN();
2139 JNI_END
2140
2141
2142
2143 #define DEFINE_SETSTATICFIELD(Argument,Fieldname,Result,SigType,unionType \
2144 , EntryProbe, ReturnProbe) \
2145 \
2146 JNI_ENTRY(void, jni_SetStatic##Result##Field(JNIEnv *env, jclass clazz, jfieldID fieldID, Argument value)) \
2147 EntryProbe; \
2148 \
2149 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID); \
2150 assert(id->is_static_field_id(), "invalid static field id"); \
2151 /* Keep JVMTI addition small and only check enabled flag here. */ \
2152 /* jni_SetField_probe() assumes that is okay to create handles. */ \
2153 if (JvmtiExport::should_post_field_modification()) { \
2154 jvalue field_value; \
2155 field_value.unionType = value; \
2156 JvmtiExport::jni_SetField_probe(thread, nullptr, nullptr, id->holder(), fieldID, true, SigType, (jvalue *)&field_value); \
2157 } \
2158 id->holder()->java_mirror()-> Fieldname##_field_put (id->offset(), value); \
2159 log_debug_if_final_static_field(THREAD, "SetStatic<Type>Field", id->holder(), id->offset()); \
2160 ReturnProbe;\
2161 JNI_END
2162
2163 DEFINE_SETSTATICFIELD(jboolean, bool, Boolean, JVM_SIGNATURE_BOOLEAN, z
2164 , HOTSPOT_JNI_SETSTATICBOOLEANFIELD_ENTRY(env, clazz, (uintptr_t)fieldID, value),
2165 HOTSPOT_JNI_SETSTATICBOOLEANFIELD_RETURN())
2166 DEFINE_SETSTATICFIELD(jbyte, byte, Byte, JVM_SIGNATURE_BYTE, b
2167 , HOTSPOT_JNI_SETSTATICBYTEFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value),
2168 HOTSPOT_JNI_SETSTATICBYTEFIELD_RETURN())
2169 DEFINE_SETSTATICFIELD(jchar, char, Char, JVM_SIGNATURE_CHAR, c
2170 , HOTSPOT_JNI_SETSTATICCHARFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value),
2171 HOTSPOT_JNI_SETSTATICCHARFIELD_RETURN())
2172 DEFINE_SETSTATICFIELD(jshort, short, Short, JVM_SIGNATURE_SHORT, s
2173 , HOTSPOT_JNI_SETSTATICSHORTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value),
2174 HOTSPOT_JNI_SETSTATICSHORTFIELD_RETURN())
2175 DEFINE_SETSTATICFIELD(jint, int, Int, JVM_SIGNATURE_INT, i
2176 , HOTSPOT_JNI_SETSTATICINTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value),
2177 HOTSPOT_JNI_SETSTATICINTFIELD_RETURN())
2178 DEFINE_SETSTATICFIELD(jlong, long, Long, JVM_SIGNATURE_LONG, j
2179 , HOTSPOT_JNI_SETSTATICLONGFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value),
2180 HOTSPOT_JNI_SETSTATICLONGFIELD_RETURN())
2181 // Float and double probes don't return value because dtrace doesn't currently support it
2182 DEFINE_SETSTATICFIELD(jfloat, float, Float, JVM_SIGNATURE_FLOAT, f
2183 , HOTSPOT_JNI_SETSTATICFLOATFIELD_ENTRY(env, clazz, (uintptr_t) fieldID),
2184 HOTSPOT_JNI_SETSTATICFLOATFIELD_RETURN())
2185 DEFINE_SETSTATICFIELD(jdouble, double, Double, JVM_SIGNATURE_DOUBLE, d
2186 , HOTSPOT_JNI_SETSTATICDOUBLEFIELD_ENTRY(env, clazz, (uintptr_t) fieldID),
2187 HOTSPOT_JNI_SETSTATICDOUBLEFIELD_RETURN())
2188
2189 //
2190 // String Operations
2191 //
2192
2193 // Unicode Interface
2194
2195 DT_RETURN_MARK_DECL(NewString, jstring
2196 , HOTSPOT_JNI_NEWSTRING_RETURN(_ret_ref));
2197
2198 JNI_ENTRY(jstring, jni_NewString(JNIEnv *env, const jchar *unicodeChars, jsize len))
2199 HOTSPOT_JNI_NEWSTRING_ENTRY(env, (uint16_t *) unicodeChars, len);
2200 jstring ret = nullptr;
2201 DT_RETURN_MARK(NewString, jstring, (const jstring&)ret);
2202 oop string=java_lang_String::create_oop_from_unicode((jchar*) unicodeChars, len, CHECK_NULL);
2203 ret = (jstring) JNIHandles::make_local(THREAD, string);
2204 return ret;
2205 JNI_END
2206
2207
2208 JNI_ENTRY_NO_PRESERVE(jsize, jni_GetStringLength(JNIEnv *env, jstring string))
2209 HOTSPOT_JNI_GETSTRINGLENGTH_ENTRY(env, string);
2210 jsize ret = 0;
2211 oop s = JNIHandles::resolve_non_null(string);
2212 ret = java_lang_String::length(s);
2213 HOTSPOT_JNI_GETSTRINGLENGTH_RETURN(ret);
2214 return ret;
2215 JNI_END
2216
2217
2218 JNI_ENTRY_NO_PRESERVE(const jchar*, jni_GetStringChars(
2219 JNIEnv *env, jstring string, jboolean *isCopy))
2220 HOTSPOT_JNI_GETSTRINGCHARS_ENTRY(env, string, (uintptr_t *) isCopy);
2221 jchar* buf = nullptr;
2222 oop s = JNIHandles::resolve_non_null(string);
2223 typeArrayOop s_value = java_lang_String::value(s);
2224 if (s_value != nullptr) {
2225 int s_len = java_lang_String::length(s, s_value);
2226 bool is_latin1 = java_lang_String::is_latin1(s);
2227 buf = NEW_C_HEAP_ARRAY_RETURN_NULL(jchar, s_len + 1, mtInternal); // add one for zero termination
2228 /* JNI Specification states return null on OOM */
2229 if (buf != nullptr) {
2230 if (s_len > 0) {
2231 if (!is_latin1) {
2232 ArrayAccess<>::arraycopy_to_native(s_value, (size_t) typeArrayOopDesc::element_offset<jchar>(0),
2233 buf, s_len);
2234 } else {
2235 for (int i = 0; i < s_len; i++) {
2236 buf[i] = ((jchar) s_value->byte_at(i)) & 0xff;
2237 }
2238 }
2239 }
2240 buf[s_len] = 0;
2241 //%note jni_5
2242 if (isCopy != nullptr) {
2243 *isCopy = JNI_TRUE;
2244 }
2245 }
2246 }
2247 HOTSPOT_JNI_GETSTRINGCHARS_RETURN(buf);
2248 return buf;
2249 JNI_END
2250
2251
2252 JNI_ENTRY_NO_PRESERVE(void, jni_ReleaseStringChars(JNIEnv *env, jstring str, const jchar *chars))
2253 HOTSPOT_JNI_RELEASESTRINGCHARS_ENTRY(env, str, (uint16_t *) chars);
2254 //%note jni_6
2255 if (chars != nullptr) {
2256 // Since String objects are supposed to be immutable, don't copy any
2257 // new data back. A bad user will have to go after the char array.
2258 FreeHeap((void*) chars);
2259 }
2260 HOTSPOT_JNI_RELEASESTRINGCHARS_RETURN();
2261 JNI_END
2262
2263
2264 // UTF Interface
2265
2266 DT_RETURN_MARK_DECL(NewStringUTF, jstring
2267 , HOTSPOT_JNI_NEWSTRINGUTF_RETURN(_ret_ref));
2268
2269 JNI_ENTRY(jstring, jni_NewStringUTF(JNIEnv *env, const char *bytes))
2270 HOTSPOT_JNI_NEWSTRINGUTF_ENTRY(env, (char *) bytes);
2271 jstring ret;
2272 DT_RETURN_MARK(NewStringUTF, jstring, (const jstring&)ret);
2273
2274 oop result = java_lang_String::create_oop_from_str((char*) bytes, CHECK_NULL);
2275 ret = (jstring) JNIHandles::make_local(THREAD, result);
2276 return ret;
2277 JNI_END
2278
2279
2280 JNI_ENTRY(jsize, jni_GetStringUTFLength(JNIEnv *env, jstring string))
2281 HOTSPOT_JNI_GETSTRINGUTFLENGTH_ENTRY(env, string);
2282 oop java_string = JNIHandles::resolve_non_null(string);
2283 jsize ret = java_lang_String::utf8_length_as_int(java_string);
2284 HOTSPOT_JNI_GETSTRINGUTFLENGTH_RETURN(ret);
2285 return ret;
2286 JNI_END
2287
2288 JNI_ENTRY(jlong, jni_GetStringUTFLengthAsLong(JNIEnv *env, jstring string))
2289 HOTSPOT_JNI_GETSTRINGUTFLENGTHASLONG_ENTRY(env, string);
2290 oop java_string = JNIHandles::resolve_non_null(string);
2291 size_t ret = java_lang_String::utf8_length(java_string);
2292 HOTSPOT_JNI_GETSTRINGUTFLENGTHASLONG_RETURN(ret);
2293 return checked_cast<jlong>(ret);
2294 JNI_END
2295
2296
2297 JNI_ENTRY(const char*, jni_GetStringUTFChars(JNIEnv *env, jstring string, jboolean *isCopy))
2298 HOTSPOT_JNI_GETSTRINGUTFCHARS_ENTRY(env, string, (uintptr_t *) isCopy);
2299 char* result = nullptr;
2300 oop java_string = JNIHandles::resolve_non_null(string);
2301 typeArrayOop s_value = java_lang_String::value(java_string);
2302 if (s_value != nullptr) {
2303 size_t length = java_lang_String::utf8_length(java_string, s_value);
2304 // JNI Specification states return null on OOM.
2305 // The resulting sequence doesn't have to be NUL-terminated but we do.
2306 result = AllocateHeap(length + 1, mtInternal, AllocFailStrategy::RETURN_NULL);
2307 if (result != nullptr) {
2308 java_lang_String::as_utf8_string(java_string, s_value, result, length + 1);
2309 if (isCopy != nullptr) {
2310 *isCopy = JNI_TRUE;
2311 }
2312 }
2313 }
2314 HOTSPOT_JNI_GETSTRINGUTFCHARS_RETURN(result);
2315 return result;
2316 JNI_END
2317
2318
2319 JNI_LEAF(void, jni_ReleaseStringUTFChars(JNIEnv *env, jstring str, const char *chars))
2320 HOTSPOT_JNI_RELEASESTRINGUTFCHARS_ENTRY(env, str, (char *) chars);
2321 if (chars != nullptr) {
2322 FreeHeap((char*) chars);
2323 }
2324 HOTSPOT_JNI_RELEASESTRINGUTFCHARS_RETURN();
2325 JNI_END
2326
2327
2328 JNI_ENTRY_NO_PRESERVE(jsize, jni_GetArrayLength(JNIEnv *env, jarray array))
2329 HOTSPOT_JNI_GETARRAYLENGTH_ENTRY(env, array);
2330 arrayOop a = arrayOop(JNIHandles::resolve_non_null(array));
2331 assert(a->is_array(), "must be array");
2332 jsize ret = a->length();
2333 HOTSPOT_JNI_GETARRAYLENGTH_RETURN(ret);
2334 return ret;
2335 JNI_END
2336
2337
2338 //
2339 // Object Array Operations
2340 //
2341
2342 DT_RETURN_MARK_DECL(NewObjectArray, jobjectArray
2343 , HOTSPOT_JNI_NEWOBJECTARRAY_RETURN(_ret_ref));
2344
2345 JNI_ENTRY(jobjectArray, jni_NewObjectArray(JNIEnv *env, jsize length, jclass elementClass, jobject initialElement))
2346 HOTSPOT_JNI_NEWOBJECTARRAY_ENTRY(env, length, elementClass, initialElement);
2347 jobjectArray ret = nullptr;
2348 DT_RETURN_MARK(NewObjectArray, jobjectArray, (const jobjectArray&)ret);
2349 Klass* ek = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(elementClass));
2350
2351 // Make sure bottom_klass is initialized.
2352 ek->initialize(CHECK_NULL);
2353 objArrayOop result = oopFactory::new_objArray(ek, length, CHECK_NULL);
2354
2355 oop initial_value = JNIHandles::resolve(initialElement);
2356 if (initial_value != nullptr) { // array already initialized with null
2357 for (int index = 0; index < length; index++) {
2358 result->obj_at_put(index, initial_value);
2359 }
2360 }
2361 ret = (jobjectArray) JNIHandles::make_local(THREAD, result);
2362 return ret;
2363 JNI_END
2364
2365 DT_RETURN_MARK_DECL(GetObjectArrayElement, jobject
2366 , HOTSPOT_JNI_GETOBJECTARRAYELEMENT_RETURN(_ret_ref));
2367
2368 JNI_ENTRY(jobject, jni_GetObjectArrayElement(JNIEnv *env, jobjectArray array, jsize index))
2369 HOTSPOT_JNI_GETOBJECTARRAYELEMENT_ENTRY(env, array, index);
2370 jobject ret = nullptr;
2371 DT_RETURN_MARK(GetObjectArrayElement, jobject, (const jobject&)ret);
2372 objArrayOop a = oop_cast<objArrayOop>(JNIHandles::resolve_non_null(array));
2373 if (a->is_within_bounds(index)) {
2374 oop res = a->obj_at(index, CHECK_NULL);
2375 assert(res != nullptr || !a->is_null_free_array(), "Invalid value");
2376 ret = JNIHandles::make_local(THREAD, res);
2377 return ret;
2378 } else {
2379 ResourceMark rm(THREAD);
2380 stringStream ss;
2381 ss.print("Index %d out of bounds for length %d", index, a->length());
2382 THROW_MSG_NULL(vmSymbols::java_lang_ArrayIndexOutOfBoundsException(), ss.as_string());
2383 }
2384 JNI_END
2385
2386 DT_VOID_RETURN_MARK_DECL(SetObjectArrayElement
2387 , HOTSPOT_JNI_SETOBJECTARRAYELEMENT_RETURN());
2388
2389 JNI_ENTRY(void, jni_SetObjectArrayElement(JNIEnv *env, jobjectArray array, jsize index, jobject value))
2390 HOTSPOT_JNI_SETOBJECTARRAYELEMENT_ENTRY(env, array, index, value);
2391 DT_VOID_RETURN_MARK(SetObjectArrayElement);
2392
2393 objArrayOop a = oop_cast<objArrayOop>(JNIHandles::resolve_non_null(array));
2394 oop v = JNIHandles::resolve(value);
2395 if (a->is_within_bounds(index)) {
2396 assert(a->klass()->is_refined_objArray_klass(), "must be");
2397 if (v == nullptr || v->is_a(ObjArrayKlass::cast(a->klass())->element_klass())) {
2398 a->obj_at_put(index, v, THREAD);
2399 return;
2400 } else {
2401 ResourceMark rm(THREAD);
2402 stringStream ss;
2403 Klass *bottom_kl = ObjArrayKlass::cast(a->klass())->bottom_klass();
2404 ss.print("type mismatch: can not store %s to %s[%d]",
2405 v->klass()->external_name(),
2406 bottom_kl->is_typeArray_klass() ? type2name_tab[ArrayKlass::cast(bottom_kl)->element_type()] : bottom_kl->external_name(),
2407 index);
2408 for (int dims = ArrayKlass::cast(a->klass())->dimension(); dims > 1; --dims) {
2409 ss.print("[]");
2410 }
2411 THROW_MSG(vmSymbols::java_lang_ArrayStoreException(), ss.as_string());
2412 }
2413 } else {
2414 ResourceMark rm(THREAD);
2415 stringStream ss;
2416 ss.print("Index %d out of bounds for length %d", index, a->length());
2417 THROW_MSG(vmSymbols::java_lang_ArrayIndexOutOfBoundsException(), ss.as_string());
2418 }
2419 JNI_END
2420
2421
2422
2423 #define DEFINE_NEWSCALARARRAY(Return,Allocator,Result \
2424 ,EntryProbe,ReturnProbe) \
2425 \
2426 DT_RETURN_MARK_DECL(New##Result##Array, Return \
2427 , ReturnProbe); \
2428 \
2429 JNI_ENTRY(Return, \
2430 jni_New##Result##Array(JNIEnv *env, jsize len)) \
2431 EntryProbe; \
2432 Return ret = nullptr;\
2433 DT_RETURN_MARK(New##Result##Array, Return, (const Return&)ret);\
2434 \
2435 oop obj= oopFactory::Allocator(len, CHECK_NULL); \
2436 ret = (Return) JNIHandles::make_local(THREAD, obj); \
2437 return ret;\
2438 JNI_END
2439
2440 DEFINE_NEWSCALARARRAY(jbooleanArray, new_boolArray, Boolean,
2441 HOTSPOT_JNI_NEWBOOLEANARRAY_ENTRY(env, len),
2442 HOTSPOT_JNI_NEWBOOLEANARRAY_RETURN(_ret_ref))
2443 DEFINE_NEWSCALARARRAY(jbyteArray, new_byteArray, Byte,
2444 HOTSPOT_JNI_NEWBYTEARRAY_ENTRY(env, len),
2445 HOTSPOT_JNI_NEWBYTEARRAY_RETURN(_ret_ref))
2446 DEFINE_NEWSCALARARRAY(jshortArray, new_shortArray, Short,
2447 HOTSPOT_JNI_NEWSHORTARRAY_ENTRY(env, len),
2448 HOTSPOT_JNI_NEWSHORTARRAY_RETURN(_ret_ref))
2449 DEFINE_NEWSCALARARRAY(jcharArray, new_charArray, Char,
2450 HOTSPOT_JNI_NEWCHARARRAY_ENTRY(env, len),
2451 HOTSPOT_JNI_NEWCHARARRAY_RETURN(_ret_ref))
2452 DEFINE_NEWSCALARARRAY(jintArray, new_intArray, Int,
2453 HOTSPOT_JNI_NEWINTARRAY_ENTRY(env, len),
2454 HOTSPOT_JNI_NEWINTARRAY_RETURN(_ret_ref))
2455 DEFINE_NEWSCALARARRAY(jlongArray, new_longArray, Long,
2456 HOTSPOT_JNI_NEWLONGARRAY_ENTRY(env, len),
2457 HOTSPOT_JNI_NEWLONGARRAY_RETURN(_ret_ref))
2458 DEFINE_NEWSCALARARRAY(jfloatArray, new_floatArray, Float,
2459 HOTSPOT_JNI_NEWFLOATARRAY_ENTRY(env, len),
2460 HOTSPOT_JNI_NEWFLOATARRAY_RETURN(_ret_ref))
2461 DEFINE_NEWSCALARARRAY(jdoubleArray, new_doubleArray, Double,
2462 HOTSPOT_JNI_NEWDOUBLEARRAY_ENTRY(env, len),
2463 HOTSPOT_JNI_NEWDOUBLEARRAY_RETURN(_ret_ref))
2464
2465 // Return an address which will fault if the caller writes to it.
2466
2467 static char* get_bad_address() {
2468 static char* bad_address = nullptr;
2469 if (bad_address == nullptr) {
2470 size_t size = os::vm_allocation_granularity();
2471 bad_address = os::reserve_memory(size, mtInternal);
2472 if (bad_address != nullptr) {
2473 os::protect_memory(bad_address, size, os::MEM_PROT_READ,
2474 /*is_committed*/false);
2475 }
2476 }
2477 return bad_address;
2478 }
2479
2480
2481
2482 #define DEFINE_GETSCALARARRAYELEMENTS(ElementType,Result \
2483 , EntryProbe, ReturnProbe) \
2484 \
2485 JNI_ENTRY_NO_PRESERVE(ElementType*, \
2486 jni_Get##Result##ArrayElements(JNIEnv *env, ElementType##Array array, jboolean *isCopy)) \
2487 EntryProbe; \
2488 /* allocate an chunk of memory in c land */ \
2489 typeArrayOop a = typeArrayOop(JNIHandles::resolve_non_null(array)); \
2490 ElementType* result; \
2491 int len = a->length(); \
2492 if (len == 0) { \
2493 if (isCopy != nullptr) { \
2494 *isCopy = JNI_FALSE; \
2495 } \
2496 /* Empty array: legal but useless, can't return null. \
2497 * Return a pointer to something useless. \
2498 * Avoid asserts in typeArrayOop. */ \
2499 result = (ElementType*)get_bad_address(); \
2500 } else { \
2501 /* JNI Specification states return null on OOM */ \
2502 result = NEW_C_HEAP_ARRAY_RETURN_NULL(ElementType, len, mtInternal); \
2503 if (result != nullptr) { \
2504 /* copy the array to the c chunk */ \
2505 ArrayAccess<>::arraycopy_to_native(a, typeArrayOopDesc::element_offset<ElementType>(0), \
2506 result, len); \
2507 if (isCopy) { \
2508 *isCopy = JNI_TRUE; \
2509 } \
2510 } \
2511 } \
2512 ReturnProbe; \
2513 return result; \
2514 JNI_END
2515
2516 DEFINE_GETSCALARARRAYELEMENTS(jboolean, Boolean
2517 , HOTSPOT_JNI_GETBOOLEANARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy),
2518 HOTSPOT_JNI_GETBOOLEANARRAYELEMENTS_RETURN((uintptr_t*)result))
2519 DEFINE_GETSCALARARRAYELEMENTS(jbyte, Byte
2520 , HOTSPOT_JNI_GETBYTEARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy),
2521 HOTSPOT_JNI_GETBYTEARRAYELEMENTS_RETURN((char*)result))
2522 DEFINE_GETSCALARARRAYELEMENTS(jshort, Short
2523 , HOTSPOT_JNI_GETSHORTARRAYELEMENTS_ENTRY(env, (uint16_t*) array, (uintptr_t *) isCopy),
2524 HOTSPOT_JNI_GETSHORTARRAYELEMENTS_RETURN((uint16_t*)result))
2525 DEFINE_GETSCALARARRAYELEMENTS(jchar, Char
2526 , HOTSPOT_JNI_GETCHARARRAYELEMENTS_ENTRY(env, (uint16_t*) array, (uintptr_t *) isCopy),
2527 HOTSPOT_JNI_GETCHARARRAYELEMENTS_RETURN(result))
2528 DEFINE_GETSCALARARRAYELEMENTS(jint, Int
2529 , HOTSPOT_JNI_GETINTARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy),
2530 HOTSPOT_JNI_GETINTARRAYELEMENTS_RETURN((uint32_t*)result))
2531 DEFINE_GETSCALARARRAYELEMENTS(jlong, Long
2532 , HOTSPOT_JNI_GETLONGARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy),
2533 HOTSPOT_JNI_GETLONGARRAYELEMENTS_RETURN(((uintptr_t*)result)))
2534 // Float and double probes don't return value because dtrace doesn't currently support it
2535 DEFINE_GETSCALARARRAYELEMENTS(jfloat, Float
2536 , HOTSPOT_JNI_GETFLOATARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy),
2537 HOTSPOT_JNI_GETFLOATARRAYELEMENTS_RETURN(result))
2538 DEFINE_GETSCALARARRAYELEMENTS(jdouble, Double
2539 , HOTSPOT_JNI_GETDOUBLEARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy),
2540 HOTSPOT_JNI_GETDOUBLEARRAYELEMENTS_RETURN(result))
2541
2542
2543 #define DEFINE_RELEASESCALARARRAYELEMENTS(ElementType,Result \
2544 , EntryProbe, ReturnProbe) \
2545 \
2546 JNI_ENTRY_NO_PRESERVE(void, \
2547 jni_Release##Result##ArrayElements(JNIEnv *env, ElementType##Array array, \
2548 ElementType *buf, jint mode)) \
2549 EntryProbe; \
2550 typeArrayOop a = typeArrayOop(JNIHandles::resolve_non_null(array)); \
2551 int len = a->length(); \
2552 if (len != 0) { /* Empty array: nothing to free or copy. */ \
2553 if ((mode == 0) || (mode == JNI_COMMIT)) { \
2554 ArrayAccess<>::arraycopy_from_native(buf, a, typeArrayOopDesc::element_offset<ElementType>(0), len); \
2555 } \
2556 if ((mode == 0) || (mode == JNI_ABORT)) { \
2557 FreeHeap(buf); \
2558 } \
2559 } \
2560 ReturnProbe; \
2561 JNI_END
2562
2563 DEFINE_RELEASESCALARARRAYELEMENTS(jboolean, Boolean
2564 , HOTSPOT_JNI_RELEASEBOOLEANARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) buf, mode),
2565 HOTSPOT_JNI_RELEASEBOOLEANARRAYELEMENTS_RETURN())
2566 DEFINE_RELEASESCALARARRAYELEMENTS(jbyte, Byte
2567 , HOTSPOT_JNI_RELEASEBYTEARRAYELEMENTS_ENTRY(env, array, (char *) buf, mode),
2568 HOTSPOT_JNI_RELEASEBYTEARRAYELEMENTS_RETURN())
2569 DEFINE_RELEASESCALARARRAYELEMENTS(jshort, Short
2570 , HOTSPOT_JNI_RELEASESHORTARRAYELEMENTS_ENTRY(env, array, (uint16_t *) buf, mode),
2571 HOTSPOT_JNI_RELEASESHORTARRAYELEMENTS_RETURN())
2572 DEFINE_RELEASESCALARARRAYELEMENTS(jchar, Char
2573 , HOTSPOT_JNI_RELEASECHARARRAYELEMENTS_ENTRY(env, array, (uint16_t *) buf, mode),
2574 HOTSPOT_JNI_RELEASECHARARRAYELEMENTS_RETURN())
2575 DEFINE_RELEASESCALARARRAYELEMENTS(jint, Int
2576 , HOTSPOT_JNI_RELEASEINTARRAYELEMENTS_ENTRY(env, array, (uint32_t *) buf, mode),
2577 HOTSPOT_JNI_RELEASEINTARRAYELEMENTS_RETURN())
2578 DEFINE_RELEASESCALARARRAYELEMENTS(jlong, Long
2579 , HOTSPOT_JNI_RELEASELONGARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) buf, mode),
2580 HOTSPOT_JNI_RELEASELONGARRAYELEMENTS_RETURN())
2581 DEFINE_RELEASESCALARARRAYELEMENTS(jfloat, Float
2582 , HOTSPOT_JNI_RELEASEFLOATARRAYELEMENTS_ENTRY(env, array, (float *) buf, mode),
2583 HOTSPOT_JNI_RELEASEFLOATARRAYELEMENTS_RETURN())
2584 DEFINE_RELEASESCALARARRAYELEMENTS(jdouble, Double
2585 , HOTSPOT_JNI_RELEASEDOUBLEARRAYELEMENTS_ENTRY(env, array, (double *) buf, mode),
2586 HOTSPOT_JNI_RELEASEDOUBLEARRAYELEMENTS_RETURN())
2587
2588 static void check_bounds(jsize start, jsize copy_len, jsize array_len, TRAPS) {
2589 ResourceMark rm(THREAD);
2590 if (copy_len < 0) {
2591 stringStream ss;
2592 ss.print("Length %d is negative", copy_len);
2593 THROW_MSG(vmSymbols::java_lang_ArrayIndexOutOfBoundsException(), ss.as_string());
2594 } else if (start < 0 || (start > array_len - copy_len)) {
2595 stringStream ss;
2596 ss.print("Array region %d.." INT64_FORMAT " out of bounds for length %d",
2597 start, (int64_t)start+(int64_t)copy_len, array_len);
2598 THROW_MSG(vmSymbols::java_lang_ArrayIndexOutOfBoundsException(), ss.as_string());
2599 }
2600 }
2601
2602 #define DEFINE_GETSCALARARRAYREGION(ElementType,Result \
2603 , EntryProbe, ReturnProbe) \
2604 DT_VOID_RETURN_MARK_DECL(Get##Result##ArrayRegion \
2605 , ReturnProbe); \
2606 \
2607 JNI_ENTRY(void, \
2608 jni_Get##Result##ArrayRegion(JNIEnv *env, ElementType##Array array, jsize start, \
2609 jsize len, ElementType *buf)) \
2610 EntryProbe; \
2611 DT_VOID_RETURN_MARK(Get##Result##ArrayRegion); \
2612 typeArrayOop src = typeArrayOop(JNIHandles::resolve_non_null(array)); \
2613 check_bounds(start, len, src->length(), CHECK); \
2614 if (len > 0) { \
2615 ArrayAccess<>::arraycopy_to_native(src, typeArrayOopDesc::element_offset<ElementType>(start), buf, len); \
2616 } \
2617 JNI_END
2618
2619 DEFINE_GETSCALARARRAYREGION(jboolean,Boolean
2620 , HOTSPOT_JNI_GETBOOLEANARRAYREGION_ENTRY(env, array, start, len, (uintptr_t *) buf),
2621 HOTSPOT_JNI_GETBOOLEANARRAYREGION_RETURN());
2622 DEFINE_GETSCALARARRAYREGION(jbyte, Byte
2623 , HOTSPOT_JNI_GETBYTEARRAYREGION_ENTRY(env, array, start, len, (char *) buf),
2624 HOTSPOT_JNI_GETBYTEARRAYREGION_RETURN());
2625 DEFINE_GETSCALARARRAYREGION(jshort, Short
2626 , HOTSPOT_JNI_GETSHORTARRAYREGION_ENTRY(env, array, start, len, (uint16_t *) buf),
2627 HOTSPOT_JNI_GETSHORTARRAYREGION_RETURN());
2628 DEFINE_GETSCALARARRAYREGION(jchar, Char
2629 , HOTSPOT_JNI_GETCHARARRAYREGION_ENTRY(env, array, start, len, (uint16_t*) buf),
2630 HOTSPOT_JNI_GETCHARARRAYREGION_RETURN());
2631 DEFINE_GETSCALARARRAYREGION(jint, Int
2632 , HOTSPOT_JNI_GETINTARRAYREGION_ENTRY(env, array, start, len, (uint32_t*) buf),
2633 HOTSPOT_JNI_GETINTARRAYREGION_RETURN());
2634 DEFINE_GETSCALARARRAYREGION(jlong, Long
2635 , HOTSPOT_JNI_GETLONGARRAYREGION_ENTRY(env, array, start, len, (uintptr_t *) buf),
2636 HOTSPOT_JNI_GETLONGARRAYREGION_RETURN());
2637 DEFINE_GETSCALARARRAYREGION(jfloat, Float
2638 , HOTSPOT_JNI_GETFLOATARRAYREGION_ENTRY(env, array, start, len, (float *) buf),
2639 HOTSPOT_JNI_GETFLOATARRAYREGION_RETURN());
2640 DEFINE_GETSCALARARRAYREGION(jdouble, Double
2641 , HOTSPOT_JNI_GETDOUBLEARRAYREGION_ENTRY(env, array, start, len, (double *) buf),
2642 HOTSPOT_JNI_GETDOUBLEARRAYREGION_RETURN());
2643
2644
2645 #define DEFINE_SETSCALARARRAYREGION(ElementType,Result \
2646 , EntryProbe, ReturnProbe) \
2647 DT_VOID_RETURN_MARK_DECL(Set##Result##ArrayRegion \
2648 ,ReturnProbe); \
2649 \
2650 JNI_ENTRY(void, \
2651 jni_Set##Result##ArrayRegion(JNIEnv *env, ElementType##Array array, jsize start, \
2652 jsize len, const ElementType *buf)) \
2653 EntryProbe; \
2654 DT_VOID_RETURN_MARK(Set##Result##ArrayRegion); \
2655 typeArrayOop dst = typeArrayOop(JNIHandles::resolve_non_null(array)); \
2656 check_bounds(start, len, dst->length(), CHECK); \
2657 if (len > 0) { \
2658 ArrayAccess<>::arraycopy_from_native(buf, dst, typeArrayOopDesc::element_offset<ElementType>(start), len); \
2659 } \
2660 JNI_END
2661
2662 DEFINE_SETSCALARARRAYREGION(jboolean, Boolean
2663 , HOTSPOT_JNI_SETBOOLEANARRAYREGION_ENTRY(env, array, start, len, (uintptr_t *)buf),
2664 HOTSPOT_JNI_SETBOOLEANARRAYREGION_RETURN())
2665 DEFINE_SETSCALARARRAYREGION(jbyte, Byte
2666 , HOTSPOT_JNI_SETBYTEARRAYREGION_ENTRY(env, array, start, len, (char *) buf),
2667 HOTSPOT_JNI_SETBYTEARRAYREGION_RETURN())
2668 DEFINE_SETSCALARARRAYREGION(jshort, Short
2669 , HOTSPOT_JNI_SETSHORTARRAYREGION_ENTRY(env, array, start, len, (uint16_t *) buf),
2670 HOTSPOT_JNI_SETSHORTARRAYREGION_RETURN())
2671 DEFINE_SETSCALARARRAYREGION(jchar, Char
2672 , HOTSPOT_JNI_SETCHARARRAYREGION_ENTRY(env, array, start, len, (uint16_t *) buf),
2673 HOTSPOT_JNI_SETCHARARRAYREGION_RETURN())
2674 DEFINE_SETSCALARARRAYREGION(jint, Int
2675 , HOTSPOT_JNI_SETINTARRAYREGION_ENTRY(env, array, start, len, (uint32_t *) buf),
2676 HOTSPOT_JNI_SETINTARRAYREGION_RETURN())
2677 DEFINE_SETSCALARARRAYREGION(jlong, Long
2678 , HOTSPOT_JNI_SETLONGARRAYREGION_ENTRY(env, array, start, len, (uintptr_t *) buf),
2679 HOTSPOT_JNI_SETLONGARRAYREGION_RETURN())
2680 DEFINE_SETSCALARARRAYREGION(jfloat, Float
2681 , HOTSPOT_JNI_SETFLOATARRAYREGION_ENTRY(env, array, start, len, (float *) buf),
2682 HOTSPOT_JNI_SETFLOATARRAYREGION_RETURN())
2683 DEFINE_SETSCALARARRAYREGION(jdouble, Double
2684 , HOTSPOT_JNI_SETDOUBLEARRAYREGION_ENTRY(env, array, start, len, (double *) buf),
2685 HOTSPOT_JNI_SETDOUBLEARRAYREGION_RETURN())
2686
2687
2688 DT_RETURN_MARK_DECL(RegisterNatives, jint
2689 , HOTSPOT_JNI_REGISTERNATIVES_RETURN(_ret_ref));
2690
2691 JNI_ENTRY(jint, jni_RegisterNatives(JNIEnv *env, jclass clazz,
2692 const JNINativeMethod *methods,
2693 jint nMethods))
2694 HOTSPOT_JNI_REGISTERNATIVES_ENTRY(env, clazz, (void *) methods, nMethods);
2695 jint ret = 0;
2696 DT_RETURN_MARK(RegisterNatives, jint, (const jint&)ret);
2697
2698 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz));
2699
2700 // There are no restrictions on native code registering native methods,
2701 // which allows agents to redefine the bindings to native methods, however
2702 // we issue a warning if any code running outside of the boot/platform
2703 // loader is rebinding any native methods in classes loaded by the
2704 // boot/platform loader that are in named modules. That will catch changes
2705 // to platform classes while excluding classes added to the bootclasspath.
2706 bool do_warning = false;
2707
2708 // Only instanceKlasses can have native methods
2709 if (k->is_instance_klass()) {
2710 oop cl = k->class_loader();
2711 InstanceKlass* ik = InstanceKlass::cast(k);
2712 // Check for a platform class
2713 if ((cl == nullptr || SystemDictionary::is_platform_class_loader(cl)) &&
2714 ik->module()->is_named()) {
2715 Klass* caller = thread->security_get_caller_class(1);
2716 // If no caller class, or caller class has a different loader, then
2717 // issue a warning below.
2718 do_warning = (caller == nullptr) || caller->class_loader() != cl;
2719 }
2720 }
2721
2722
2723 for (int index = 0; index < nMethods; index++) {
2724 const char* meth_name = methods[index].name;
2725 const char* meth_sig = methods[index].signature;
2726 int meth_name_len = (int)strlen(meth_name);
2727
2728 // The class should have been loaded (we have an instance of the class
2729 // passed in) so the method and signature should already be in the symbol
2730 // table. If they're not there, the method doesn't exist.
2731 TempNewSymbol name = SymbolTable::probe(meth_name, meth_name_len);
2732 TempNewSymbol signature = SymbolTable::probe(meth_sig, (int)strlen(meth_sig));
2733
2734 if (name == nullptr || signature == nullptr) {
2735 ResourceMark rm(THREAD);
2736 stringStream st;
2737 st.print("Method %s.%s%s not found", k->external_name(), meth_name, meth_sig);
2738 // Must return negative value on failure
2739 THROW_MSG_(vmSymbols::java_lang_NoSuchMethodError(), st.as_string(), -1);
2740 }
2741
2742 if (do_warning) {
2743 ResourceMark rm(THREAD);
2744 log_warning(jni, resolve)("Re-registering of platform native method: %s.%s%s "
2745 "from code in a different classloader", k->external_name(), meth_name, meth_sig);
2746 }
2747
2748 bool res = Method::register_native(k, name, signature,
2749 (address) methods[index].fnPtr, THREAD);
2750 if (!res) {
2751 ret = -1;
2752 break;
2753 }
2754 }
2755 return ret;
2756 JNI_END
2757
2758
2759 JNI_ENTRY(jint, jni_UnregisterNatives(JNIEnv *env, jclass clazz))
2760 HOTSPOT_JNI_UNREGISTERNATIVES_ENTRY(env, clazz);
2761 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz));
2762 //%note jni_2
2763 if (k->is_instance_klass()) {
2764 for (int index = 0; index < InstanceKlass::cast(k)->methods()->length(); index++) {
2765 Method* m = InstanceKlass::cast(k)->methods()->at(index);
2766 if (m->is_native()) {
2767 m->clear_native_function();
2768 m->set_signature_handler(nullptr);
2769 }
2770 }
2771 }
2772 HOTSPOT_JNI_UNREGISTERNATIVES_RETURN(0);
2773 return 0;
2774 JNI_END
2775
2776 //
2777 // Monitor functions
2778 //
2779
2780 DT_RETURN_MARK_DECL(MonitorEnter, jint
2781 , HOTSPOT_JNI_MONITORENTER_RETURN(_ret_ref));
2782
2783 JNI_ENTRY(jint, jni_MonitorEnter(JNIEnv *env, jobject jobj))
2784 HOTSPOT_JNI_MONITORENTER_ENTRY(env, jobj);
2785 jint ret = JNI_ERR;
2786 DT_RETURN_MARK(MonitorEnter, jint, (const jint&)ret);
2787
2788 // If the object is null, we can't do anything with it
2789 if (jobj == nullptr) {
2790 THROW_(vmSymbols::java_lang_NullPointerException(), JNI_ERR);
2791 }
2792
2793 Handle obj(thread, JNIHandles::resolve_non_null(jobj));
2794 ObjectSynchronizer::jni_enter(obj, CHECK_(JNI_ERR));
2795 return JNI_OK;
2796 JNI_END
2797
2798 DT_RETURN_MARK_DECL(MonitorExit, jint
2799 , HOTSPOT_JNI_MONITOREXIT_RETURN(_ret_ref));
2800
2801 JNI_ENTRY(jint, jni_MonitorExit(JNIEnv *env, jobject jobj))
2802 HOTSPOT_JNI_MONITOREXIT_ENTRY(env, jobj);
2803 jint ret = JNI_ERR;
2804 DT_RETURN_MARK(MonitorExit, jint, (const jint&)ret);
2805
2806 // Don't do anything with a null object
2807 if (jobj == nullptr) {
2808 THROW_(vmSymbols::java_lang_NullPointerException(), JNI_ERR);
2809 }
2810
2811 Handle obj(THREAD, JNIHandles::resolve_non_null(jobj));
2812 ObjectSynchronizer::jni_exit(obj(), CHECK_(JNI_ERR));
2813 return JNI_OK;
2814 JNI_END
2815
2816 //
2817 // Extensions
2818 //
2819
2820 DT_VOID_RETURN_MARK_DECL(GetStringRegion
2821 , HOTSPOT_JNI_GETSTRINGREGION_RETURN());
2822
2823 JNI_ENTRY(void, jni_GetStringRegion(JNIEnv *env, jstring string, jsize start, jsize len, jchar *buf))
2824 HOTSPOT_JNI_GETSTRINGREGION_ENTRY(env, string, start, len, buf);
2825 DT_VOID_RETURN_MARK(GetStringRegion);
2826 oop s = JNIHandles::resolve_non_null(string);
2827 typeArrayOop s_value = java_lang_String::value(s);
2828 int s_len = java_lang_String::length(s, s_value);
2829 if (start < 0 || len < 0 || start > s_len - len) {
2830 THROW(vmSymbols::java_lang_StringIndexOutOfBoundsException());
2831 } else {
2832 if (len > 0) {
2833 bool is_latin1 = java_lang_String::is_latin1(s);
2834 if (!is_latin1) {
2835 ArrayAccess<>::arraycopy_to_native(s_value, typeArrayOopDesc::element_offset<jchar>(start),
2836 buf, len);
2837 } else {
2838 for (int i = 0; i < len; i++) {
2839 buf[i] = ((jchar) s_value->byte_at(i + start)) & 0xff;
2840 }
2841 }
2842 }
2843 }
2844 JNI_END
2845
2846 DT_VOID_RETURN_MARK_DECL(GetStringUTFRegion
2847 , HOTSPOT_JNI_GETSTRINGUTFREGION_RETURN());
2848
2849 JNI_ENTRY(void, jni_GetStringUTFRegion(JNIEnv *env, jstring string, jsize start, jsize len, char *buf))
2850 HOTSPOT_JNI_GETSTRINGUTFREGION_ENTRY(env, string, start, len, buf);
2851 DT_VOID_RETURN_MARK(GetStringUTFRegion);
2852 oop s = JNIHandles::resolve_non_null(string);
2853 typeArrayOop s_value = java_lang_String::value(s);
2854 int s_len = java_lang_String::length(s, s_value);
2855 if (start < 0 || len < 0 || start > s_len - len) {
2856 THROW(vmSymbols::java_lang_StringIndexOutOfBoundsException());
2857 } else {
2858 //%note jni_7
2859 if (len > 0) {
2860 // Assume the buffer is large enough as the JNI spec. does not require user error checking
2861 java_lang_String::as_utf8_string(s, s_value, start, len, buf, INT_MAX);
2862 // as_utf8_string null-terminates the result string
2863 } else {
2864 // JDK null-terminates the buffer even in len is zero
2865 if (buf != nullptr) {
2866 buf[0] = 0;
2867 }
2868 }
2869 }
2870 JNI_END
2871
2872 JNI_ENTRY(void*, jni_GetPrimitiveArrayCritical(JNIEnv *env, jarray array, jboolean *isCopy))
2873 HOTSPOT_JNI_GETPRIMITIVEARRAYCRITICAL_ENTRY(env, array, (uintptr_t *) isCopy);
2874 Handle a(thread, JNIHandles::resolve_non_null(array));
2875 assert(a->is_typeArray(), "just checking");
2876
2877 // Pin object
2878 Universe::heap()->pin_object(thread, a());
2879
2880 BasicType type = TypeArrayKlass::cast(a->klass())->element_type();
2881 void* ret = arrayOop(a())->base(type);
2882 if (isCopy != nullptr) {
2883 *isCopy = JNI_FALSE;
2884 }
2885 HOTSPOT_JNI_GETPRIMITIVEARRAYCRITICAL_RETURN(ret);
2886 return ret;
2887 JNI_END
2888
2889
2890 JNI_ENTRY(void, jni_ReleasePrimitiveArrayCritical(JNIEnv *env, jarray array, void *carray, jint mode))
2891 HOTSPOT_JNI_RELEASEPRIMITIVEARRAYCRITICAL_ENTRY(env, array, carray, mode);
2892 // Unpin object
2893 Universe::heap()->unpin_object(thread, JNIHandles::resolve_non_null(array));
2894 HOTSPOT_JNI_RELEASEPRIMITIVEARRAYCRITICAL_RETURN();
2895 JNI_END
2896
2897
2898 JNI_ENTRY(const jchar*, jni_GetStringCritical(JNIEnv *env, jstring string, jboolean *isCopy))
2899 HOTSPOT_JNI_GETSTRINGCRITICAL_ENTRY(env, string, (uintptr_t *) isCopy);
2900 oop s = JNIHandles::resolve_non_null(string);
2901 jchar* ret;
2902 if (!java_lang_String::is_latin1(s)) {
2903 typeArrayHandle s_value(thread, java_lang_String::value(s));
2904
2905 // Pin value array
2906 Universe::heap()->pin_object(thread, s_value());
2907
2908 ret = (jchar*) s_value->base(T_CHAR);
2909 if (isCopy != nullptr) *isCopy = JNI_FALSE;
2910 } else {
2911 // Inflate latin1 encoded string to UTF16
2912 typeArrayOop s_value = java_lang_String::value(s);
2913 int s_len = java_lang_String::length(s, s_value);
2914 ret = NEW_C_HEAP_ARRAY_RETURN_NULL(jchar, s_len + 1, mtInternal); // add one for zero termination
2915 /* JNI Specification states return null on OOM */
2916 if (ret != nullptr) {
2917 for (int i = 0; i < s_len; i++) {
2918 ret[i] = ((jchar) s_value->byte_at(i)) & 0xff;
2919 }
2920 ret[s_len] = 0;
2921 }
2922 if (isCopy != nullptr) *isCopy = JNI_TRUE;
2923 }
2924 HOTSPOT_JNI_GETSTRINGCRITICAL_RETURN((uint16_t *) ret);
2925 return ret;
2926 JNI_END
2927
2928
2929 JNI_ENTRY(void, jni_ReleaseStringCritical(JNIEnv *env, jstring str, const jchar *chars))
2930 HOTSPOT_JNI_RELEASESTRINGCRITICAL_ENTRY(env, str, (uint16_t *) chars);
2931 oop s = JNIHandles::resolve_non_null(str);
2932 bool is_latin1 = java_lang_String::is_latin1(s);
2933
2934 if (is_latin1) {
2935 // For latin1 string, free jchar array allocated by earlier call to GetStringCritical.
2936 // This assumes that ReleaseStringCritical bookends GetStringCritical.
2937 FREE_C_HEAP_ARRAY(jchar, chars);
2938 } else {
2939 // StringDedup can have replaced the value array, so don't fetch the array from 's'.
2940 // Instead, we calculate the address based on the jchar array exposed with GetStringCritical.
2941 oop value = cast_to_oop((address)chars - arrayOopDesc::base_offset_in_bytes(T_CHAR));
2942
2943 // Unpin value array
2944 Universe::heap()->unpin_object(thread, value);
2945 }
2946 HOTSPOT_JNI_RELEASESTRINGCRITICAL_RETURN();
2947 JNI_END
2948
2949
2950 JNI_ENTRY(jweak, jni_NewWeakGlobalRef(JNIEnv *env, jobject ref))
2951 HOTSPOT_JNI_NEWWEAKGLOBALREF_ENTRY(env, ref);
2952 Handle ref_handle(thread, JNIHandles::resolve(ref));
2953
2954 if (!ref_handle.is_null() && ref_handle->klass()->is_inline_klass()) {
2955 ResourceMark rm(THREAD);
2956 stringStream ss;
2957 ss.print("%s is not an identity class", ref_handle->klass()->external_name());
2958 THROW_MSG_(vmSymbols::java_lang_IdentityException(), ss.as_string(), nullptr);
2959 }
2960
2961 jweak ret = JNIHandles::make_weak_global(ref_handle, AllocFailStrategy::RETURN_NULL);
2962 if (ret == nullptr && ref_handle.not_null()) {
2963 THROW_OOP_(Universe::out_of_memory_error_c_heap(), nullptr);
2964 }
2965 HOTSPOT_JNI_NEWWEAKGLOBALREF_RETURN(ret);
2966 return ret;
2967 JNI_END
2968
2969 // Must be JNI_ENTRY (with HandleMark)
2970 JNI_ENTRY(void, jni_DeleteWeakGlobalRef(JNIEnv *env, jweak ref))
2971 HOTSPOT_JNI_DELETEWEAKGLOBALREF_ENTRY(env, ref);
2972 JNIHandles::destroy_weak_global(ref);
2973 HOTSPOT_JNI_DELETEWEAKGLOBALREF_RETURN();
2974 JNI_END
2975
2976
2977 JNI_ENTRY_NO_PRESERVE(jboolean, jni_ExceptionCheck(JNIEnv *env))
2978 HOTSPOT_JNI_EXCEPTIONCHECK_ENTRY(env);
2979 jni_check_async_exceptions(thread);
2980 jboolean ret = (thread->has_pending_exception()) ? JNI_TRUE : JNI_FALSE;
2981 HOTSPOT_JNI_EXCEPTIONCHECK_RETURN(ret);
2982 return ret;
2983 JNI_END
2984
2985
2986 // Initialization state for three routines below relating to
2987 // java.nio.DirectBuffers
2988 static int directBufferSupportInitializeStarted = 0;
2989 static volatile int directBufferSupportInitializeEnded = 0;
2990 static volatile int directBufferSupportInitializeFailed = 0;
2991 static jclass bufferClass = nullptr;
2992 static jclass directBufferClass = nullptr;
2993 static jclass directByteBufferClass = nullptr;
2994 static jmethodID directByteBufferConstructor = nullptr;
2995 static jfieldID directBufferAddressField = nullptr;
2996 static jfieldID bufferCapacityField = nullptr;
2997
2998 static jclass lookupOne(JNIEnv* env, const char* name, TRAPS) {
2999 Handle loader; // null (bootstrap) loader
3000
3001 TempNewSymbol sym = SymbolTable::new_symbol(name);
3002 jclass result = find_class_from_class_loader(env, sym, true, loader, true, CHECK_NULL);
3003
3004 if (log_is_enabled(Debug, class, resolve) && result != nullptr) {
3005 trace_class_resolution(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(result)));
3006 }
3007 return result;
3008 }
3009
3010 // These lookups are done with the null (bootstrap) ClassLoader to
3011 // circumvent any security checks that would be done by jni_FindClass.
3012 JNI_ENTRY(bool, lookupDirectBufferClasses(JNIEnv* env))
3013 {
3014 if ((bufferClass = lookupOne(env, "java/nio/Buffer", thread)) == nullptr) { return false; }
3015 if ((directBufferClass = lookupOne(env, "sun/nio/ch/DirectBuffer", thread)) == nullptr) { return false; }
3016 if ((directByteBufferClass = lookupOne(env, "java/nio/DirectByteBuffer", thread)) == nullptr) { return false; }
3017 return true;
3018 }
3019 JNI_END
3020
3021
3022 static bool initializeDirectBufferSupport(JNIEnv* env, JavaThread* thread) {
3023 if (directBufferSupportInitializeFailed) {
3024 return false;
3025 }
3026
3027 if (AtomicAccess::cmpxchg(&directBufferSupportInitializeStarted, 0, 1) == 0) {
3028 if (!lookupDirectBufferClasses(env)) {
3029 directBufferSupportInitializeFailed = 1;
3030 return false;
3031 }
3032
3033 // Make global references for these
3034 bufferClass = (jclass) env->NewGlobalRef(bufferClass);
3035 directBufferClass = (jclass) env->NewGlobalRef(directBufferClass);
3036 directByteBufferClass = (jclass) env->NewGlobalRef(directByteBufferClass);
3037
3038 // Global refs will be null if out-of-memory (no exception is pending)
3039 if (bufferClass == nullptr || directBufferClass == nullptr || directByteBufferClass == nullptr) {
3040 directBufferSupportInitializeFailed = 1;
3041 return false;
3042 }
3043
3044 // Get needed field and method IDs
3045 directByteBufferConstructor = env->GetMethodID(directByteBufferClass, "<init>", "(JJ)V");
3046 if (env->ExceptionCheck()) {
3047 env->ExceptionClear();
3048 directBufferSupportInitializeFailed = 1;
3049 return false;
3050 }
3051 directBufferAddressField = env->GetFieldID(bufferClass, "address", "J");
3052 if (env->ExceptionCheck()) {
3053 env->ExceptionClear();
3054 directBufferSupportInitializeFailed = 1;
3055 return false;
3056 }
3057 bufferCapacityField = env->GetFieldID(bufferClass, "capacity", "I");
3058 if (env->ExceptionCheck()) {
3059 env->ExceptionClear();
3060 directBufferSupportInitializeFailed = 1;
3061 return false;
3062 }
3063
3064 if ((directByteBufferConstructor == nullptr) ||
3065 (directBufferAddressField == nullptr) ||
3066 (bufferCapacityField == nullptr)) {
3067 directBufferSupportInitializeFailed = 1;
3068 return false;
3069 }
3070
3071 directBufferSupportInitializeEnded = 1;
3072 } else {
3073 while (!directBufferSupportInitializeEnded && !directBufferSupportInitializeFailed) {
3074 os::naked_yield();
3075 }
3076 }
3077
3078 return !directBufferSupportInitializeFailed;
3079 }
3080
3081 extern "C" jobject JNICALL jni_NewDirectByteBuffer(JNIEnv *env, void* address, jlong capacity)
3082 {
3083 // thread_from_jni_environment() will block if VM is gone.
3084 JavaThread* thread = JavaThread::thread_from_jni_environment(env);
3085
3086 HOTSPOT_JNI_NEWDIRECTBYTEBUFFER_ENTRY(env, address, capacity);
3087
3088 if (!directBufferSupportInitializeEnded) {
3089 if (!initializeDirectBufferSupport(env, thread)) {
3090 HOTSPOT_JNI_NEWDIRECTBYTEBUFFER_RETURN(nullptr);
3091 return nullptr;
3092 }
3093 }
3094
3095 // Being paranoid about accidental sign extension on address
3096 jlong addr = (jlong) ((uintptr_t) address);
3097 jobject ret = env->NewObject(directByteBufferClass, directByteBufferConstructor, addr, capacity);
3098 HOTSPOT_JNI_NEWDIRECTBYTEBUFFER_RETURN(ret);
3099 return ret;
3100 }
3101
3102 DT_RETURN_MARK_DECL(GetDirectBufferAddress, void*
3103 , HOTSPOT_JNI_GETDIRECTBUFFERADDRESS_RETURN((void*) _ret_ref));
3104
3105 extern "C" void* JNICALL jni_GetDirectBufferAddress(JNIEnv *env, jobject buf)
3106 {
3107 // thread_from_jni_environment() will block if VM is gone.
3108 JavaThread* thread = JavaThread::thread_from_jni_environment(env);
3109
3110 HOTSPOT_JNI_GETDIRECTBUFFERADDRESS_ENTRY(env, buf);
3111 void* ret = nullptr;
3112 DT_RETURN_MARK(GetDirectBufferAddress, void*, (const void*&)ret);
3113
3114 if (!directBufferSupportInitializeEnded) {
3115 if (!initializeDirectBufferSupport(env, thread)) {
3116 return nullptr;
3117 }
3118 }
3119
3120 if ((buf != nullptr) && (!env->IsInstanceOf(buf, directBufferClass))) {
3121 return nullptr;
3122 }
3123
3124 ret = (void*)(intptr_t)env->GetLongField(buf, directBufferAddressField);
3125 return ret;
3126 }
3127
3128 DT_RETURN_MARK_DECL(GetDirectBufferCapacity, jlong
3129 , HOTSPOT_JNI_GETDIRECTBUFFERCAPACITY_RETURN(_ret_ref));
3130
3131 extern "C" jlong JNICALL jni_GetDirectBufferCapacity(JNIEnv *env, jobject buf)
3132 {
3133 // thread_from_jni_environment() will block if VM is gone.
3134 JavaThread* thread = JavaThread::thread_from_jni_environment(env);
3135
3136 HOTSPOT_JNI_GETDIRECTBUFFERCAPACITY_ENTRY(env, buf);
3137 jlong ret = -1;
3138 DT_RETURN_MARK(GetDirectBufferCapacity, jlong, (const jlong&)ret);
3139
3140 if (!directBufferSupportInitializeEnded) {
3141 if (!initializeDirectBufferSupport(env, thread)) {
3142 ret = 0;
3143 return ret;
3144 }
3145 }
3146
3147 if (buf == nullptr) {
3148 return -1;
3149 }
3150
3151 if (!env->IsInstanceOf(buf, directBufferClass)) {
3152 return -1;
3153 }
3154
3155 // NOTE that capacity is currently an int in the implementation
3156 ret = env->GetIntField(buf, bufferCapacityField);
3157 return ret;
3158 }
3159
3160
3161 JNI_LEAF(jint, jni_GetVersion(JNIEnv *env))
3162 HOTSPOT_JNI_GETVERSION_ENTRY(env);
3163 HOTSPOT_JNI_GETVERSION_RETURN(CurrentVersion);
3164 return CurrentVersion;
3165 JNI_END
3166
3167 extern struct JavaVM_ main_vm;
3168
3169 JNI_LEAF(jint, jni_GetJavaVM(JNIEnv *env, JavaVM **vm))
3170 HOTSPOT_JNI_GETJAVAVM_ENTRY(env, (void **) vm);
3171 *vm = (JavaVM *)(&main_vm);
3172 HOTSPOT_JNI_GETJAVAVM_RETURN(JNI_OK);
3173 return JNI_OK;
3174 JNI_END
3175
3176
3177 JNI_ENTRY(jobject, jni_GetModule(JNIEnv* env, jclass clazz))
3178 HOTSPOT_JNI_GETMODULE_ENTRY(env, clazz);
3179 jobject ret = Modules::get_module(clazz, THREAD);
3180 HOTSPOT_JNI_GETMODULE_RETURN(ret);
3181 return ret;
3182 JNI_END
3183
3184 JNI_ENTRY(jboolean, jni_IsVirtualThread(JNIEnv* env, jobject obj))
3185 HOTSPOT_JNI_ISVIRTUALTHREAD_ENTRY(env, obj);
3186 jboolean ret = JNI_FALSE;
3187 oop thread_obj = JNIHandles::resolve_external_guard(obj);
3188 if (thread_obj != nullptr && thread_obj->is_a(vmClasses::BaseVirtualThread_klass())) {
3189 ret = JNI_TRUE;
3190 }
3191 HOTSPOT_JNI_ISVIRTUALTHREAD_RETURN(ret);
3192 return ret;
3193 JNI_END
3194
3195 JNI_ENTRY(jboolean, jni_IsValueObject(JNIEnv* env, jobject obj))
3196 HOTSPOT_JNI_ISVALUEOBJECT_ENTRY(env, obj);
3197 oop o = JNIHandles::resolve(obj);
3198 if (o != nullptr && o->klass()->is_inline_klass()) {
3199 HOTSPOT_JNI_ISVALUEOBJECT_RETURN(JNI_TRUE);
3200 return JNI_TRUE;
3201 } else {
3202 HOTSPOT_JNI_ISVALUEOBJECT_RETURN(JNI_FALSE);
3203 return JNI_FALSE;
3204 }
3205 JNI_END
3206
3207 // Structure containing all jni functions
3208 struct JNINativeInterface_ jni_NativeInterface = {
3209 nullptr,
3210 nullptr,
3211 nullptr,
3212
3213 nullptr,
3214
3215 jni_GetVersion,
3216
3217 jni_DefineClass,
3218 jni_FindClass,
3219
3220 jni_FromReflectedMethod,
3221 jni_FromReflectedField,
3222
3223 jni_ToReflectedMethod,
3224
3225 jni_GetSuperclass,
3226 jni_IsAssignableFrom,
3227
3228 jni_ToReflectedField,
3229
3230 jni_Throw,
3231 jni_ThrowNew,
3232 jni_ExceptionOccurred,
3233 jni_ExceptionDescribe,
3234 jni_ExceptionClear,
3235 jni_FatalError,
3236
3237 jni_PushLocalFrame,
3238 jni_PopLocalFrame,
3239
3240 jni_NewGlobalRef,
3241 jni_DeleteGlobalRef,
3242 jni_DeleteLocalRef,
3243 jni_IsSameObject,
3244
3245 jni_NewLocalRef,
3246 jni_EnsureLocalCapacity,
3247
3248 jni_AllocObject,
3249 jni_NewObject,
3250 jni_NewObjectV,
3251 jni_NewObjectA,
3252
3253 jni_GetObjectClass,
3254 jni_IsInstanceOf,
3255
3256 jni_GetMethodID,
3257
3258 jni_CallObjectMethod,
3259 jni_CallObjectMethodV,
3260 jni_CallObjectMethodA,
3261 jni_CallBooleanMethod,
3262 jni_CallBooleanMethodV,
3263 jni_CallBooleanMethodA,
3264 jni_CallByteMethod,
3265 jni_CallByteMethodV,
3266 jni_CallByteMethodA,
3267 jni_CallCharMethod,
3268 jni_CallCharMethodV,
3269 jni_CallCharMethodA,
3270 jni_CallShortMethod,
3271 jni_CallShortMethodV,
3272 jni_CallShortMethodA,
3273 jni_CallIntMethod,
3274 jni_CallIntMethodV,
3275 jni_CallIntMethodA,
3276 jni_CallLongMethod,
3277 jni_CallLongMethodV,
3278 jni_CallLongMethodA,
3279 jni_CallFloatMethod,
3280 jni_CallFloatMethodV,
3281 jni_CallFloatMethodA,
3282 jni_CallDoubleMethod,
3283 jni_CallDoubleMethodV,
3284 jni_CallDoubleMethodA,
3285 jni_CallVoidMethod,
3286 jni_CallVoidMethodV,
3287 jni_CallVoidMethodA,
3288
3289 jni_CallNonvirtualObjectMethod,
3290 jni_CallNonvirtualObjectMethodV,
3291 jni_CallNonvirtualObjectMethodA,
3292 jni_CallNonvirtualBooleanMethod,
3293 jni_CallNonvirtualBooleanMethodV,
3294 jni_CallNonvirtualBooleanMethodA,
3295 jni_CallNonvirtualByteMethod,
3296 jni_CallNonvirtualByteMethodV,
3297 jni_CallNonvirtualByteMethodA,
3298 jni_CallNonvirtualCharMethod,
3299 jni_CallNonvirtualCharMethodV,
3300 jni_CallNonvirtualCharMethodA,
3301 jni_CallNonvirtualShortMethod,
3302 jni_CallNonvirtualShortMethodV,
3303 jni_CallNonvirtualShortMethodA,
3304 jni_CallNonvirtualIntMethod,
3305 jni_CallNonvirtualIntMethodV,
3306 jni_CallNonvirtualIntMethodA,
3307 jni_CallNonvirtualLongMethod,
3308 jni_CallNonvirtualLongMethodV,
3309 jni_CallNonvirtualLongMethodA,
3310 jni_CallNonvirtualFloatMethod,
3311 jni_CallNonvirtualFloatMethodV,
3312 jni_CallNonvirtualFloatMethodA,
3313 jni_CallNonvirtualDoubleMethod,
3314 jni_CallNonvirtualDoubleMethodV,
3315 jni_CallNonvirtualDoubleMethodA,
3316 jni_CallNonvirtualVoidMethod,
3317 jni_CallNonvirtualVoidMethodV,
3318 jni_CallNonvirtualVoidMethodA,
3319
3320 jni_GetFieldID,
3321
3322 jni_GetObjectField,
3323 jni_GetBooleanField,
3324 jni_GetByteField,
3325 jni_GetCharField,
3326 jni_GetShortField,
3327 jni_GetIntField,
3328 jni_GetLongField,
3329 jni_GetFloatField,
3330 jni_GetDoubleField,
3331
3332 jni_SetObjectField,
3333 jni_SetBooleanField,
3334 jni_SetByteField,
3335 jni_SetCharField,
3336 jni_SetShortField,
3337 jni_SetIntField,
3338 jni_SetLongField,
3339 jni_SetFloatField,
3340 jni_SetDoubleField,
3341
3342 jni_GetStaticMethodID,
3343
3344 jni_CallStaticObjectMethod,
3345 jni_CallStaticObjectMethodV,
3346 jni_CallStaticObjectMethodA,
3347 jni_CallStaticBooleanMethod,
3348 jni_CallStaticBooleanMethodV,
3349 jni_CallStaticBooleanMethodA,
3350 jni_CallStaticByteMethod,
3351 jni_CallStaticByteMethodV,
3352 jni_CallStaticByteMethodA,
3353 jni_CallStaticCharMethod,
3354 jni_CallStaticCharMethodV,
3355 jni_CallStaticCharMethodA,
3356 jni_CallStaticShortMethod,
3357 jni_CallStaticShortMethodV,
3358 jni_CallStaticShortMethodA,
3359 jni_CallStaticIntMethod,
3360 jni_CallStaticIntMethodV,
3361 jni_CallStaticIntMethodA,
3362 jni_CallStaticLongMethod,
3363 jni_CallStaticLongMethodV,
3364 jni_CallStaticLongMethodA,
3365 jni_CallStaticFloatMethod,
3366 jni_CallStaticFloatMethodV,
3367 jni_CallStaticFloatMethodA,
3368 jni_CallStaticDoubleMethod,
3369 jni_CallStaticDoubleMethodV,
3370 jni_CallStaticDoubleMethodA,
3371 jni_CallStaticVoidMethod,
3372 jni_CallStaticVoidMethodV,
3373 jni_CallStaticVoidMethodA,
3374
3375 jni_GetStaticFieldID,
3376
3377 jni_GetStaticObjectField,
3378 jni_GetStaticBooleanField,
3379 jni_GetStaticByteField,
3380 jni_GetStaticCharField,
3381 jni_GetStaticShortField,
3382 jni_GetStaticIntField,
3383 jni_GetStaticLongField,
3384 jni_GetStaticFloatField,
3385 jni_GetStaticDoubleField,
3386
3387 jni_SetStaticObjectField,
3388 jni_SetStaticBooleanField,
3389 jni_SetStaticByteField,
3390 jni_SetStaticCharField,
3391 jni_SetStaticShortField,
3392 jni_SetStaticIntField,
3393 jni_SetStaticLongField,
3394 jni_SetStaticFloatField,
3395 jni_SetStaticDoubleField,
3396
3397 jni_NewString,
3398 jni_GetStringLength,
3399 jni_GetStringChars,
3400 jni_ReleaseStringChars,
3401
3402 jni_NewStringUTF,
3403 jni_GetStringUTFLength,
3404 jni_GetStringUTFChars,
3405 jni_ReleaseStringUTFChars,
3406
3407 jni_GetArrayLength,
3408
3409 jni_NewObjectArray,
3410 jni_GetObjectArrayElement,
3411 jni_SetObjectArrayElement,
3412
3413 jni_NewBooleanArray,
3414 jni_NewByteArray,
3415 jni_NewCharArray,
3416 jni_NewShortArray,
3417 jni_NewIntArray,
3418 jni_NewLongArray,
3419 jni_NewFloatArray,
3420 jni_NewDoubleArray,
3421
3422 jni_GetBooleanArrayElements,
3423 jni_GetByteArrayElements,
3424 jni_GetCharArrayElements,
3425 jni_GetShortArrayElements,
3426 jni_GetIntArrayElements,
3427 jni_GetLongArrayElements,
3428 jni_GetFloatArrayElements,
3429 jni_GetDoubleArrayElements,
3430
3431 jni_ReleaseBooleanArrayElements,
3432 jni_ReleaseByteArrayElements,
3433 jni_ReleaseCharArrayElements,
3434 jni_ReleaseShortArrayElements,
3435 jni_ReleaseIntArrayElements,
3436 jni_ReleaseLongArrayElements,
3437 jni_ReleaseFloatArrayElements,
3438 jni_ReleaseDoubleArrayElements,
3439
3440 jni_GetBooleanArrayRegion,
3441 jni_GetByteArrayRegion,
3442 jni_GetCharArrayRegion,
3443 jni_GetShortArrayRegion,
3444 jni_GetIntArrayRegion,
3445 jni_GetLongArrayRegion,
3446 jni_GetFloatArrayRegion,
3447 jni_GetDoubleArrayRegion,
3448
3449 jni_SetBooleanArrayRegion,
3450 jni_SetByteArrayRegion,
3451 jni_SetCharArrayRegion,
3452 jni_SetShortArrayRegion,
3453 jni_SetIntArrayRegion,
3454 jni_SetLongArrayRegion,
3455 jni_SetFloatArrayRegion,
3456 jni_SetDoubleArrayRegion,
3457
3458 jni_RegisterNatives,
3459 jni_UnregisterNatives,
3460
3461 jni_MonitorEnter,
3462 jni_MonitorExit,
3463
3464 jni_GetJavaVM,
3465
3466 jni_GetStringRegion,
3467 jni_GetStringUTFRegion,
3468
3469 jni_GetPrimitiveArrayCritical,
3470 jni_ReleasePrimitiveArrayCritical,
3471
3472 jni_GetStringCritical,
3473 jni_ReleaseStringCritical,
3474
3475 jni_NewWeakGlobalRef,
3476 jni_DeleteWeakGlobalRef,
3477
3478 jni_ExceptionCheck,
3479
3480 jni_NewDirectByteBuffer,
3481 jni_GetDirectBufferAddress,
3482 jni_GetDirectBufferCapacity,
3483
3484 // New 1_6 features
3485
3486 jni_GetObjectRefType,
3487
3488 // Module features
3489
3490 jni_GetModule,
3491
3492 // Virtual threads
3493
3494 jni_IsVirtualThread,
3495
3496 // Large UTF8 support
3497
3498 jni_GetStringUTFLengthAsLong,
3499
3500 // Value classes
3501
3502 jni_IsValueObject
3503 };
3504
3505
3506 // For jvmti use to modify jni function table.
3507 // Java threads in native contiues to run until it is transitioned
3508 // to VM at safepoint. Before the transition or before it is blocked
3509 // for safepoint it may access jni function table. VM could crash if
3510 // any java thread access the jni function table in the middle of memcpy.
3511 // To avoid this each function pointers are copied automically.
3512 void copy_jni_function_table(const struct JNINativeInterface_ *new_jni_NativeInterface) {
3513 assert(SafepointSynchronize::is_at_safepoint(), "must be at safepoint");
3514 intptr_t *a = (intptr_t *) jni_functions();
3515 intptr_t *b = (intptr_t *) new_jni_NativeInterface;
3516 for (uint i=0; i < sizeof(struct JNINativeInterface_)/sizeof(void *); i++) {
3517 AtomicAccess::store(a++, *b++);
3518 }
3519 }
3520
3521 void quicken_jni_functions() {
3522 // Replace Get<Primitive>Field with fast versions
3523 if (UseFastJNIAccessors && !VerifyJNIFields && !CheckJNICalls) {
3524 address func;
3525 func = JNI_FastGetField::generate_fast_get_boolean_field();
3526 if (func != (address)-1) {
3527 jni_NativeInterface.GetBooleanField = (GetBooleanField_t)func;
3528 }
3529 func = JNI_FastGetField::generate_fast_get_byte_field();
3530 if (func != (address)-1) {
3531 jni_NativeInterface.GetByteField = (GetByteField_t)func;
3532 }
3533 func = JNI_FastGetField::generate_fast_get_char_field();
3534 if (func != (address)-1) {
3535 jni_NativeInterface.GetCharField = (GetCharField_t)func;
3536 }
3537 func = JNI_FastGetField::generate_fast_get_short_field();
3538 if (func != (address)-1) {
3539 jni_NativeInterface.GetShortField = (GetShortField_t)func;
3540 }
3541 func = JNI_FastGetField::generate_fast_get_int_field();
3542 if (func != (address)-1) {
3543 jni_NativeInterface.GetIntField = (GetIntField_t)func;
3544 }
3545 func = JNI_FastGetField::generate_fast_get_long_field();
3546 if (func != (address)-1) {
3547 jni_NativeInterface.GetLongField = (GetLongField_t)func;
3548 }
3549 func = JNI_FastGetField::generate_fast_get_float_field();
3550 if (func != (address)-1) {
3551 jni_NativeInterface.GetFloatField = (GetFloatField_t)func;
3552 }
3553 func = JNI_FastGetField::generate_fast_get_double_field();
3554 if (func != (address)-1) {
3555 jni_NativeInterface.GetDoubleField = (GetDoubleField_t)func;
3556 }
3557 }
3558 }
3559
3560 // Returns the function structure
3561 struct JNINativeInterface_* jni_functions() {
3562 #if INCLUDE_JNI_CHECK
3563 if (CheckJNICalls) return jni_functions_check();
3564 #endif // INCLUDE_JNI_CHECK
3565 return &jni_NativeInterface;
3566 }
3567
3568 // Returns the function structure
3569 struct JNINativeInterface_* jni_functions_nocheck() {
3570 return &jni_NativeInterface;
3571 }
3572
3573
3574 // Invocation API
3575
3576
3577 // Forward declaration
3578 extern const struct JNIInvokeInterface_ jni_InvokeInterface;
3579
3580 // Global invocation API vars
3581 enum VM_Creation_State {
3582 NOT_CREATED = 0,
3583 IN_PROGRESS, // Most JNI operations are permitted during this phase to
3584 // allow for initialization actions by libraries and agents.
3585 COMPLETE
3586 };
3587
3588 volatile VM_Creation_State vm_created = NOT_CREATED;
3589
3590 bool is_vm_created() {
3591 return AtomicAccess::load(&vm_created) == COMPLETE;
3592 }
3593
3594 // Indicate whether it is safe to recreate VM. Recreation is only
3595 // possible after a failed initial creation attempt in some cases.
3596 volatile int safe_to_recreate_vm = 1;
3597 struct JavaVM_ main_vm = {&jni_InvokeInterface};
3598
3599
3600 #define JAVASTACKSIZE (400 * 1024) /* Default size of a thread java stack */
3601 enum { VERIFY_NONE, VERIFY_REMOTE, VERIFY_ALL };
3602
3603 DT_RETURN_MARK_DECL(GetDefaultJavaVMInitArgs, jint
3604 , HOTSPOT_JNI_GETDEFAULTJAVAVMINITARGS_RETURN(_ret_ref));
3605
3606 _JNI_IMPORT_OR_EXPORT_ jint JNICALL JNI_GetDefaultJavaVMInitArgs(void *args_) {
3607 HOTSPOT_JNI_GETDEFAULTJAVAVMINITARGS_ENTRY(args_);
3608 JDK1_1InitArgs *args = (JDK1_1InitArgs *)args_;
3609 jint ret = JNI_ERR;
3610 DT_RETURN_MARK(GetDefaultJavaVMInitArgs, jint, (const jint&)ret);
3611
3612 if (Threads::is_supported_jni_version(args->version)) {
3613 ret = JNI_OK;
3614 }
3615 // 1.1 style no longer supported in hotspot.
3616 // According the JNI spec, we should update args->version on return.
3617 // We also use the structure to communicate with launcher about default
3618 // stack size.
3619 if (args->version == JNI_VERSION_1_1) {
3620 args->version = JNI_VERSION_1_2;
3621 // javaStackSize is int in arguments structure
3622 assert(jlong(ThreadStackSize) * K < INT_MAX, "integer overflow");
3623 args->javaStackSize = (jint)(ThreadStackSize * K);
3624 }
3625 return ret;
3626 }
3627
3628 DT_RETURN_MARK_DECL(CreateJavaVM, jint
3629 , HOTSPOT_JNI_CREATEJAVAVM_RETURN(_ret_ref));
3630
3631 static jint JNI_CreateJavaVM_inner(JavaVM **vm, void **penv, void *args) {
3632 HOTSPOT_JNI_CREATEJAVAVM_ENTRY((void **) vm, penv, args);
3633
3634 jint result = JNI_ERR;
3635 DT_RETURN_MARK(CreateJavaVM, jint, (const jint&)result);
3636
3637 // We're about to use AtomicAccess::xchg for synchronization. Some Zero
3638 // platforms use the GCC builtin __sync_lock_test_and_set for this,
3639 // but __sync_lock_test_and_set is not guaranteed to do what we want
3640 // on all architectures. So we check it works before relying on it.
3641 #if defined(ZERO) && defined(ASSERT)
3642 {
3643 jint a = 0xcafebabe;
3644 jint b = AtomicAccess::xchg(&a, (jint) 0xdeadbeef);
3645 void *c = &a;
3646 void *d = AtomicAccess::xchg(&c, &b);
3647 assert(a == (jint) 0xdeadbeef && b == (jint) 0xcafebabe, "AtomicAccess::xchg() works");
3648 assert(c == &b && d == &a, "AtomicAccess::xchg() works");
3649 }
3650 #endif // ZERO && ASSERT
3651
3652 // At the moment it's only possible to have one Java VM,
3653 // since some of the runtime state is in global variables.
3654
3655 // We cannot use our mutex locks here, since they only work on
3656 // Threads. We do an atomic compare and exchange to ensure only
3657 // one thread can call this method at a time
3658
3659 // We use AtomicAccess::xchg rather than AtomicAccess::add/dec since on some platforms
3660 // the add/dec implementations are dependent on whether we are running
3661 // on a multiprocessor AtomicAccess::xchg does not have this problem.
3662 if (AtomicAccess::xchg(&vm_created, IN_PROGRESS) != NOT_CREATED) {
3663 return JNI_EEXIST; // already created, or create attempt in progress
3664 }
3665
3666 // If a previous creation attempt failed but can be retried safely,
3667 // then safe_to_recreate_vm will have been reset to 1 after being
3668 // cleared here. If a previous creation attempt succeeded and we then
3669 // destroyed that VM, we will be prevented from trying to recreate
3670 // the VM in the same process, as the value will still be 0.
3671 if (AtomicAccess::xchg(&safe_to_recreate_vm, 0) == 0) {
3672 return JNI_ERR;
3673 }
3674
3675 /**
3676 * Certain errors during initialization are recoverable and do not
3677 * prevent this method from being called again at a later time
3678 * (perhaps with different arguments). However, at a certain
3679 * point during initialization if an error occurs we cannot allow
3680 * this function to be called again (or it will crash). In those
3681 * situations, the 'canTryAgain' flag is set to false, which atomically
3682 * sets safe_to_recreate_vm to 1, such that any new call to
3683 * JNI_CreateJavaVM will immediately fail using the above logic.
3684 */
3685 bool can_try_again = true;
3686
3687 result = Threads::create_vm((JavaVMInitArgs*) args, &can_try_again);
3688 if (result == JNI_OK) {
3689 JavaThread *thread = JavaThread::current();
3690 assert(!thread->has_pending_exception(), "should have returned not OK");
3691 // thread is thread_in_vm here
3692 *vm = (JavaVM *)(&main_vm);
3693 *(JNIEnv**)penv = thread->jni_environment();
3694 // mark creation complete for other JNI ops
3695 AtomicAccess::release_store(&vm_created, COMPLETE);
3696
3697 #if INCLUDE_JVMCI
3698 if (EnableJVMCI) {
3699 if (UseJVMCICompiler) {
3700 // JVMCI is initialized on a CompilerThread
3701 if (BootstrapJVMCI) {
3702 JavaThread* THREAD = thread; // For exception macros.
3703 JVMCICompiler* compiler = JVMCICompiler::instance(true, CATCH);
3704 compiler->bootstrap(THREAD);
3705 if (HAS_PENDING_EXCEPTION) {
3706 HandleMark hm(THREAD);
3707 vm_exit_during_initialization(Handle(THREAD, PENDING_EXCEPTION));
3708 }
3709 }
3710 }
3711 }
3712 #endif
3713
3714 // Notify JVMTI
3715 if (JvmtiExport::should_post_thread_life()) {
3716 JvmtiExport::post_thread_start(thread);
3717 }
3718
3719 JFR_ONLY(Jfr::on_thread_start(thread);)
3720
3721 if (ReplayCompiles) ciReplay::replay(thread);
3722
3723 #ifdef ASSERT
3724 // Some platforms (like Win*) need a wrapper around these test
3725 // functions in order to properly handle error conditions.
3726 if (ErrorHandlerTest != 0) {
3727 VMError::controlled_crash(ErrorHandlerTest);
3728 }
3729 #endif
3730
3731 // Since this is not a JVM_ENTRY we have to set the thread state manually before leaving.
3732 ThreadStateTransition::transition_from_vm(thread, _thread_in_native);
3733 MACOS_AARCH64_ONLY(thread->enable_wx(WXExec));
3734 } else {
3735 // If create_vm exits because of a pending exception, exit with that
3736 // exception. In the future when we figure out how to reclaim memory,
3737 // we may be able to exit with JNI_ERR and allow the calling application
3738 // to continue.
3739 if (Universe::is_fully_initialized()) {
3740 // otherwise no pending exception possible - VM will already have aborted
3741 Thread* current = Thread::current_or_null();
3742 if (current != nullptr) {
3743 JavaThread* THREAD = JavaThread::cast(current); // For exception macros.
3744 assert(HAS_PENDING_EXCEPTION, "must be - else no current thread exists");
3745 HandleMark hm(THREAD);
3746 vm_exit_during_initialization(Handle(THREAD, PENDING_EXCEPTION));
3747 }
3748 }
3749
3750 if (can_try_again) {
3751 // reset safe_to_recreate_vm to 1 so that retrial would be possible
3752 safe_to_recreate_vm = 1;
3753 }
3754
3755 // Creation failed. We must reset vm_created
3756 *vm = nullptr;
3757 *(JNIEnv**)penv = nullptr;
3758 // reset vm_created last to avoid race condition. Use OrderAccess to
3759 // control both compiler and architectural-based reordering.
3760 assert(vm_created == IN_PROGRESS, "must be");
3761 AtomicAccess::release_store(&vm_created, NOT_CREATED);
3762 }
3763
3764 // Flush stdout and stderr before exit.
3765 fflush(stdout);
3766 fflush(stderr);
3767
3768 return result;
3769
3770 }
3771
3772 _JNI_IMPORT_OR_EXPORT_ jint JNICALL JNI_CreateJavaVM(JavaVM **vm, void **penv, void *args) {
3773 jint result = JNI_ERR;
3774 // On Windows, let CreateJavaVM run with SEH protection
3775 #if defined(_WIN32) && !defined(USE_VECTORED_EXCEPTION_HANDLING)
3776 __try {
3777 #endif
3778 result = JNI_CreateJavaVM_inner(vm, penv, args);
3779 #if defined(_WIN32) && !defined(USE_VECTORED_EXCEPTION_HANDLING)
3780 } __except(topLevelExceptionFilter((_EXCEPTION_POINTERS*)_exception_info())) {
3781 // Nothing to do.
3782 }
3783 #endif
3784 return result;
3785 }
3786
3787 _JNI_IMPORT_OR_EXPORT_ jint JNICALL JNI_GetCreatedJavaVMs(JavaVM **vm_buf, jsize bufLen, jsize *numVMs) {
3788 HOTSPOT_JNI_GETCREATEDJAVAVMS_ENTRY((void **) vm_buf, bufLen, (uintptr_t *) numVMs);
3789
3790 if (vm_created == COMPLETE) {
3791 if (numVMs != nullptr) *numVMs = 1;
3792 if (bufLen > 0) *vm_buf = (JavaVM *)(&main_vm);
3793 } else {
3794 if (numVMs != nullptr) *numVMs = 0;
3795 }
3796 HOTSPOT_JNI_GETCREATEDJAVAVMS_RETURN(JNI_OK);
3797 return JNI_OK;
3798 }
3799
3800 extern "C" {
3801
3802 DT_RETURN_MARK_DECL(DestroyJavaVM, jint
3803 , HOTSPOT_JNI_DESTROYJAVAVM_RETURN(_ret_ref));
3804
3805 static jint JNICALL jni_DestroyJavaVM_inner(JavaVM *vm) {
3806 HOTSPOT_JNI_DESTROYJAVAVM_ENTRY(vm);
3807 jint res = JNI_ERR;
3808 DT_RETURN_MARK(DestroyJavaVM, jint, (const jint&)res);
3809
3810 if (vm_created == NOT_CREATED) {
3811 res = JNI_ERR;
3812 return res;
3813 }
3814
3815 JNIEnv *env;
3816 JavaVMAttachArgs destroyargs;
3817 destroyargs.version = CurrentVersion;
3818 destroyargs.name = (char *)"DestroyJavaVM";
3819 destroyargs.group = nullptr;
3820 res = vm->AttachCurrentThread((void **)&env, (void *)&destroyargs);
3821 if (res != JNI_OK) {
3822 return res;
3823 }
3824
3825 JavaThread* thread = JavaThread::current();
3826
3827 // Make sure we are actually in a newly attached thread, with no
3828 // existing Java frame.
3829 if (thread->has_last_Java_frame()) {
3830 return JNI_ERR;
3831 }
3832
3833 // Since this is not a JVM_ENTRY we have to set the thread state manually before entering.
3834
3835 // We are going to VM, change W^X state to the expected one.
3836 MACOS_AARCH64_ONLY(WXMode oldmode = thread->enable_wx(WXWrite));
3837
3838 ThreadStateTransition::transition_from_native(thread, _thread_in_vm);
3839 Threads::destroy_vm();
3840 // Don't bother restoring thread state, VM is gone.
3841 vm_created = NOT_CREATED;
3842 return JNI_OK;
3843 }
3844
3845 jint JNICALL jni_DestroyJavaVM(JavaVM *vm) {
3846 jint result = JNI_ERR;
3847 // On Windows, we need SEH protection
3848 #if defined(_WIN32) && !defined(USE_VECTORED_EXCEPTION_HANDLING)
3849 __try {
3850 #endif
3851 result = jni_DestroyJavaVM_inner(vm);
3852 #if defined(_WIN32) && !defined(USE_VECTORED_EXCEPTION_HANDLING)
3853 } __except(topLevelExceptionFilter((_EXCEPTION_POINTERS*)_exception_info())) {
3854 // Nothing to do.
3855 }
3856 #endif
3857 return result;
3858 }
3859
3860 static jint attach_current_thread(JavaVM *vm, void **penv, void *_args, bool daemon) {
3861 JavaVMAttachArgs *args = (JavaVMAttachArgs *) _args;
3862
3863 // Check below commented out from JDK1.2fcs as well
3864 /*
3865 if (args && (args->version != JNI_VERSION_1_1 || args->version != JNI_VERSION_1_2)) {
3866 return JNI_EVERSION;
3867 }
3868 */
3869
3870 Thread* t = Thread::current_or_null();
3871 if (t != nullptr) {
3872 // If executing from an atexit hook we may be in the VMThread.
3873 if (t->is_Java_thread()) {
3874 // If the thread has been attached this operation is a no-op
3875 *(JNIEnv**)penv = JavaThread::cast(t)->jni_environment();
3876 return JNI_OK;
3877 } else {
3878 return JNI_ERR;
3879 }
3880 }
3881
3882 // Create a thread and mark it as attaching so it will be skipped by the
3883 // ThreadsListEnumerator - see CR 6404306
3884 JavaThread* thread = JavaThread::create_attaching_thread();
3885
3886 // Set correct safepoint info. The thread is going to call into Java when
3887 // initializing the Java level thread object. Hence, the correct state must
3888 // be set in order for the Safepoint code to deal with it correctly.
3889 thread->set_thread_state(_thread_in_vm);
3890 thread->record_stack_base_and_size();
3891 thread->initialize_thread_current();
3892 thread->register_thread_stack_with_NMT();
3893 MACOS_AARCH64_ONLY(thread->init_wx());
3894
3895 if (!os::create_attached_thread(thread)) {
3896 thread->unregister_thread_stack_with_NMT();
3897 thread->smr_delete();
3898 return JNI_ERR;
3899 }
3900 // Enable stack overflow checks
3901 thread->stack_overflow_state()->create_stack_guard_pages();
3902
3903 thread->initialize_tlab();
3904
3905 thread->cache_global_variables();
3906
3907 // Set the _monitor_owner_id to the next thread_id temporarily while initialization runs.
3908 // Do it now before we make this thread visible in Threads::add().
3909 thread->set_monitor_owner_id(ThreadIdentifier::next());
3910
3911 // This thread will not do a safepoint check, since it has
3912 // not been added to the Thread list yet.
3913 { MutexLocker ml(Threads_lock);
3914 // This must be inside this lock in order to get FullGCALot to work properly, i.e., to
3915 // avoid this thread trying to do a GC before it is added to the thread-list
3916 thread->set_active_handles(JNIHandleBlock::allocate_block());
3917 Threads::add(thread, daemon);
3918 }
3919 // Create thread group and name info from attach arguments
3920 oop group = nullptr;
3921 char* thread_name = nullptr;
3922 if (args != nullptr && Threads::is_supported_jni_version(args->version)) {
3923 group = JNIHandles::resolve(args->group);
3924 thread_name = args->name; // may be null
3925 }
3926 if (group == nullptr) group = Universe::main_thread_group();
3927
3928 // Create Java level thread object and attach it to this thread
3929 bool attach_failed = false;
3930 {
3931 EXCEPTION_MARK;
3932 HandleMark hm(THREAD);
3933 Handle thread_group(THREAD, group);
3934 thread->allocate_threadObj(thread_group, thread_name, daemon, THREAD);
3935 if (HAS_PENDING_EXCEPTION) {
3936 CLEAR_PENDING_EXCEPTION;
3937 // cleanup outside the handle mark.
3938 attach_failed = true;
3939 }
3940 }
3941
3942 if (attach_failed) {
3943 // Added missing cleanup
3944 thread->cleanup_failed_attach_current_thread(daemon);
3945 thread->unregister_thread_stack_with_NMT();
3946 thread->smr_delete();
3947 return JNI_ERR;
3948 }
3949
3950 // Update the _monitor_owner_id with the tid value.
3951 thread->set_monitor_owner_id(java_lang_Thread::thread_id(thread->threadObj()));
3952
3953 // Want this inside 'attaching via jni'.
3954 JFR_ONLY(Jfr::on_thread_start(thread);)
3955
3956 // mark the thread as no longer attaching
3957 // this uses a fence to push the change through so we don't have
3958 // to regrab the threads_lock
3959 thread->set_done_attaching_via_jni();
3960
3961 // Set java thread status.
3962 java_lang_Thread::set_thread_status(thread->threadObj(),
3963 JavaThreadStatus::RUNNABLE);
3964
3965 // Notify the debugger
3966 if (JvmtiExport::should_post_thread_life()) {
3967 JvmtiExport::post_thread_start(thread);
3968 }
3969
3970 *(JNIEnv**)penv = thread->jni_environment();
3971
3972 // Now leaving the VM, so change thread_state. This is normally automatically taken care
3973 // of in the JVM_ENTRY. But in this situation we have to do it manually.
3974 ThreadStateTransition::transition_from_vm(thread, _thread_in_native);
3975 MACOS_AARCH64_ONLY(thread->enable_wx(WXExec));
3976
3977 // Perform any platform dependent FPU setup
3978 os::setup_fpu();
3979
3980 return JNI_OK;
3981 }
3982
3983
3984 jint JNICALL jni_AttachCurrentThread(JavaVM *vm, void **penv, void *_args) {
3985 HOTSPOT_JNI_ATTACHCURRENTTHREAD_ENTRY(vm, penv, _args);
3986 if (vm_created == NOT_CREATED) {
3987 // Not sure how we could possibly get here.
3988 HOTSPOT_JNI_ATTACHCURRENTTHREAD_RETURN((uint32_t) JNI_ERR);
3989 return JNI_ERR;
3990 }
3991
3992 jint ret = attach_current_thread(vm, penv, _args, false);
3993 HOTSPOT_JNI_ATTACHCURRENTTHREAD_RETURN(ret);
3994 return ret;
3995 }
3996
3997
3998 jint JNICALL jni_DetachCurrentThread(JavaVM *vm) {
3999 HOTSPOT_JNI_DETACHCURRENTTHREAD_ENTRY(vm);
4000 if (vm_created == NOT_CREATED) {
4001 // Not sure how we could possibly get here.
4002 HOTSPOT_JNI_DETACHCURRENTTHREAD_RETURN(JNI_ERR);
4003 return JNI_ERR;
4004 }
4005
4006 Thread* current = Thread::current_or_null();
4007
4008 // If the thread has already been detached the operation is a no-op
4009 if (current == nullptr) {
4010 HOTSPOT_JNI_DETACHCURRENTTHREAD_RETURN(JNI_OK);
4011 return JNI_OK;
4012 }
4013
4014 // If executing from an atexit hook we may be in the VMThread.
4015 if (!current->is_Java_thread()) {
4016 HOTSPOT_JNI_DETACHCURRENTTHREAD_RETURN((uint32_t) JNI_ERR);
4017 return JNI_ERR;
4018 }
4019
4020 VM_Exit::block_if_vm_exited();
4021
4022 JavaThread* thread = JavaThread::cast(current);
4023 if (thread->has_last_Java_frame()) {
4024 HOTSPOT_JNI_DETACHCURRENTTHREAD_RETURN((uint32_t) JNI_ERR);
4025 // Can't detach a thread that's running java, that can't work.
4026 return JNI_ERR;
4027 }
4028
4029 // We are going to VM, change W^X state to the expected one.
4030 MACOS_AARCH64_ONLY(thread->enable_wx(WXWrite));
4031
4032 // Safepoint support. Have to do call-back to safepoint code, if in the
4033 // middle of a safepoint operation
4034 ThreadStateTransition::transition_from_native(thread, _thread_in_vm);
4035
4036 // XXX: Note that JavaThread::exit() call below removes the guards on the
4037 // stack pages set up via enable_stack_{red,yellow}_zone() calls
4038 // above in jni_AttachCurrentThread. Unfortunately, while the setting
4039 // of the guards is visible in jni_AttachCurrentThread above,
4040 // the removal of the guards is buried below in JavaThread::exit()
4041 // here. The abstraction should be more symmetrically either exposed
4042 // or hidden (e.g. it could probably be hidden in the same
4043 // (platform-dependent) methods where we do alternate stack
4044 // maintenance work?)
4045 thread->exit(false, JavaThread::jni_detach);
4046 thread->unregister_thread_stack_with_NMT();
4047 thread->smr_delete();
4048
4049 // Go to the execute mode, the initial state of the thread on creation.
4050 // Use os interface as the thread is not a JavaThread anymore.
4051 MACOS_AARCH64_ONLY(os::current_thread_enable_wx(WXExec));
4052
4053 HOTSPOT_JNI_DETACHCURRENTTHREAD_RETURN(JNI_OK);
4054 return JNI_OK;
4055 }
4056
4057 DT_RETURN_MARK_DECL(GetEnv, jint
4058 , HOTSPOT_JNI_GETENV_RETURN(_ret_ref));
4059
4060 jint JNICALL jni_GetEnv(JavaVM *vm, void **penv, jint version) {
4061 HOTSPOT_JNI_GETENV_ENTRY(vm, penv, version);
4062 jint ret = JNI_ERR;
4063 DT_RETURN_MARK(GetEnv, jint, (const jint&)ret);
4064
4065 if (vm_created == NOT_CREATED) {
4066 *penv = nullptr;
4067 ret = JNI_EDETACHED;
4068 return ret;
4069 }
4070
4071 if (JniExportedInterface::GetExportedInterface(vm, penv, version, &ret)) {
4072 return ret;
4073 }
4074
4075 #ifndef JVMPI_VERSION_1
4076 // need these in order to be polite about older agents
4077 #define JVMPI_VERSION_1 ((jint)0x10000001)
4078 #define JVMPI_VERSION_1_1 ((jint)0x10000002)
4079 #define JVMPI_VERSION_1_2 ((jint)0x10000003)
4080 #endif // !JVMPI_VERSION_1
4081
4082 Thread* thread = Thread::current_or_null();
4083 if (thread != nullptr && thread->is_Java_thread()) {
4084 if (Threads::is_supported_jni_version_including_1_1(version)) {
4085 *(JNIEnv**)penv = JavaThread::cast(thread)->jni_environment();
4086 ret = JNI_OK;
4087 return ret;
4088
4089 } else if (version == JVMPI_VERSION_1 ||
4090 version == JVMPI_VERSION_1_1 ||
4091 version == JVMPI_VERSION_1_2) {
4092 tty->print_cr("ERROR: JVMPI, an experimental interface, is no longer supported.");
4093 tty->print_cr("Please use the supported interface: the JVM Tool Interface (JVM TI).");
4094 ret = JNI_EVERSION;
4095 return ret;
4096 } else if (JvmtiExport::is_jvmdi_version(version)) {
4097 tty->print_cr("FATAL ERROR: JVMDI is no longer supported.");
4098 tty->print_cr("Please use the supported interface: the JVM Tool Interface (JVM TI).");
4099 ret = JNI_EVERSION;
4100 return ret;
4101 } else {
4102 *penv = nullptr;
4103 ret = JNI_EVERSION;
4104 return ret;
4105 }
4106 } else {
4107 *penv = nullptr;
4108 ret = JNI_EDETACHED;
4109 return ret;
4110 }
4111 }
4112
4113
4114 jint JNICALL jni_AttachCurrentThreadAsDaemon(JavaVM *vm, void **penv, void *_args) {
4115 HOTSPOT_JNI_ATTACHCURRENTTHREADASDAEMON_ENTRY(vm, penv, _args);
4116 if (vm_created == NOT_CREATED) {
4117 // Not sure how we could possibly get here.
4118 HOTSPOT_JNI_ATTACHCURRENTTHREADASDAEMON_RETURN((uint32_t) JNI_ERR);
4119 return JNI_ERR;
4120 }
4121
4122 jint ret = attach_current_thread(vm, penv, _args, true);
4123 HOTSPOT_JNI_ATTACHCURRENTTHREADASDAEMON_RETURN(ret);
4124 return ret;
4125 }
4126
4127
4128 } // End extern "C"
4129
4130 const struct JNIInvokeInterface_ jni_InvokeInterface = {
4131 nullptr,
4132 nullptr,
4133 nullptr,
4134
4135 jni_DestroyJavaVM,
4136 jni_AttachCurrentThread,
4137 jni_DetachCurrentThread,
4138 jni_GetEnv,
4139 jni_AttachCurrentThreadAsDaemon
4140 };