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