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 "prims/jniCheck.hpp"
68 #include "prims/jniExport.hpp"
69 #include "prims/jniFastGetField.hpp"
70 #include "prims/jvm_misc.hpp"
71 #include "prims/jvmtiExport.hpp"
72 #include "prims/jvmtiThreadState.hpp"
73 #include "runtime/arguments.hpp"
74 #include "runtime/atomicAccess.hpp"
75 #include "runtime/fieldDescriptor.inline.hpp"
76 #include "runtime/handles.inline.hpp"
77 #include "runtime/interfaceSupport.inline.hpp"
78 #include "runtime/java.hpp"
79 #include "runtime/javaCalls.hpp"
80 #include "runtime/javaThread.inline.hpp"
81 #include "runtime/jfieldIDWorkaround.hpp"
82 #include "runtime/jniHandles.inline.hpp"
83 #include "runtime/reflection.hpp"
84 #include "runtime/safepointVerifiers.hpp"
85 #include "runtime/sharedRuntime.hpp"
86 #include "runtime/signature.hpp"
87 #include "runtime/synchronizer.hpp"
88 #include "runtime/thread.inline.hpp"
89 #include "runtime/vmOperations.hpp"
90 #include "services/runtimeService.hpp"
91 #include "utilities/defaultStream.hpp"
92 #include "utilities/dtrace.hpp"
93 #include "utilities/events.hpp"
94 #include "utilities/macros.hpp"
95 #include "utilities/vmError.hpp"
96 #if INCLUDE_JVMCI
97 #include "jvmci/jvmciCompiler.hpp"
98 #endif
99 #if INCLUDE_JFR
100 #include "jfr/jfr.hpp"
101 #endif
102
103 static jint CurrentVersion = JNI_VERSION_24;
104
105 #if defined(_WIN32) && !defined(USE_VECTORED_EXCEPTION_HANDLING)
106 extern LONG WINAPI topLevelExceptionFilter(_EXCEPTION_POINTERS* );
107 #endif
108
109 // The DT_RETURN_MARK macros create a scoped object to fire the dtrace
110 // '-return' probe regardless of the return path is taken out of the function.
111 // Methods that have multiple return paths use this to avoid having to
112 // instrument each return path. Methods that use CHECK or THROW must use this
113 // since those macros can cause an immediate uninstrumented return.
114 //
115 // In order to get the return value, a reference to the variable containing
116 // the return value must be passed to the constructor of the object, and
117 // the return value must be set before return (since the mark object has
118 // a reference to it).
119 //
120 // Example:
121 // DT_RETURN_MARK_DECL(SomeFunc, int);
122 // JNI_ENTRY(int, SomeFunc, ...)
123 // int return_value = 0;
124 // DT_RETURN_MARK(SomeFunc, int, (const int&)return_value);
125 // foo(CHECK_0)
126 // return_value = 5;
127 // return return_value;
128 // JNI_END
129 #define DT_RETURN_MARK_DECL(name, type, probe) \
130 DTRACE_ONLY( \
131 class DTraceReturnProbeMark_##name { \
132 public: \
133 const type& _ret_ref; \
134 DTraceReturnProbeMark_##name(const type& v) : _ret_ref(v) {} \
135 ~DTraceReturnProbeMark_##name() { \
136 probe; \
137 } \
138 } \
139 )
140 // Void functions are simpler since there's no return value
141 #define DT_VOID_RETURN_MARK_DECL(name, probe) \
142 DTRACE_ONLY( \
143 class DTraceReturnProbeMark_##name { \
144 public: \
145 ~DTraceReturnProbeMark_##name() { \
146 probe; \
147 } \
148 } \
149 )
150
151 // Place these macros in the function to mark the return. Non-void
152 // functions need the type and address of the return value.
153 #define DT_RETURN_MARK(name, type, ref) \
154 DTRACE_ONLY( DTraceReturnProbeMark_##name dtrace_return_mark(ref) )
155 #define DT_VOID_RETURN_MARK(name) \
156 DTRACE_ONLY( DTraceReturnProbeMark_##name dtrace_return_mark )
157
158
159 // Use these to select distinct code for floating-point vs. non-floating point
160 // situations. Used from within common macros where we need slightly
161 // different behavior for Float/Double
162 #define FP_SELECT_Boolean(intcode, fpcode) intcode
163 #define FP_SELECT_Byte(intcode, fpcode) intcode
164 #define FP_SELECT_Char(intcode, fpcode) intcode
165 #define FP_SELECT_Short(intcode, fpcode) intcode
166 #define FP_SELECT_Object(intcode, fpcode) intcode
167 #define FP_SELECT_Int(intcode, fpcode) intcode
168 #define FP_SELECT_Long(intcode, fpcode) intcode
169 #define FP_SELECT_Float(intcode, fpcode) fpcode
170 #define FP_SELECT_Double(intcode, fpcode) fpcode
171 #define FP_SELECT(TypeName, intcode, fpcode) \
172 FP_SELECT_##TypeName(intcode, fpcode)
173
174 // Choose DT_RETURN_MARK macros based on the type: float/double -> void
175 // (dtrace doesn't do FP yet)
176 #define DT_RETURN_MARK_DECL_FOR(TypeName, name, type, probe) \
177 FP_SELECT(TypeName, \
178 DT_RETURN_MARK_DECL(name, type, probe), DT_VOID_RETURN_MARK_DECL(name, probe) )
179 #define DT_RETURN_MARK_FOR(TypeName, name, type, ref) \
180 FP_SELECT(TypeName, \
181 DT_RETURN_MARK(name, type, ref), DT_VOID_RETURN_MARK(name) )
182
183
184 // out-of-line helpers for class jfieldIDWorkaround:
185
186 bool jfieldIDWorkaround::is_valid_jfieldID(Klass* k, jfieldID id) {
187 if (jfieldIDWorkaround::is_instance_jfieldID(k, id)) {
188 uintptr_t as_uint = (uintptr_t) id;
189 int offset = raw_instance_offset(id);
190 if (is_checked_jfieldID(id)) {
191 if (!klass_hash_ok(k, id)) {
192 return false;
193 }
194 }
195 return InstanceKlass::cast(k)->contains_field_offset(offset);
196 } else {
197 JNIid* result = (JNIid*) id;
198 #ifdef ASSERT
199 return result != nullptr && result->is_static_field_id();
200 #else
201 return result != nullptr;
202 #endif
203 }
204 }
205
206
207 intptr_t jfieldIDWorkaround::encode_klass_hash(Klass* k, int offset) {
208 if (offset <= small_offset_mask) {
209 Klass* field_klass = k;
210 Klass* super_klass = field_klass->super();
211 // With compressed oops the most super class with nonstatic fields would
212 // be the owner of fields embedded in the header.
213 while (InstanceKlass::cast(super_klass)->has_nonstatic_fields() &&
214 InstanceKlass::cast(super_klass)->contains_field_offset(offset)) {
215 field_klass = super_klass; // super contains the field also
216 super_klass = field_klass->super();
217 }
218 DEBUG_ONLY(NoSafepointVerifier nosafepoint;)
219 uintptr_t klass_hash = field_klass->identity_hash();
220 return ((klass_hash & klass_mask) << klass_shift) | checked_mask_in_place;
221 } else {
222 #if 0
223 #ifndef PRODUCT
224 {
225 ResourceMark rm;
226 warning("VerifyJNIFields: long offset %d in %s", offset, k->external_name());
227 }
228 #endif
229 #endif
230 return 0;
231 }
232 }
233
234 bool jfieldIDWorkaround::klass_hash_ok(Klass* k, jfieldID id) {
235 uintptr_t as_uint = (uintptr_t) id;
236 intptr_t klass_hash = (as_uint >> klass_shift) & klass_mask;
237 do {
238 DEBUG_ONLY(NoSafepointVerifier nosafepoint;)
239 // Could use a non-blocking query for identity_hash here...
240 if ((k->identity_hash() & klass_mask) == klass_hash)
241 return true;
242 k = k->super();
243 } while (k != nullptr);
244 return false;
245 }
246
247 void jfieldIDWorkaround::verify_instance_jfieldID(Klass* k, jfieldID id) {
248 guarantee(jfieldIDWorkaround::is_instance_jfieldID(k, id), "must be an instance field" );
249 uintptr_t as_uint = (uintptr_t) id;
250 int offset = raw_instance_offset(id);
251 if (VerifyJNIFields) {
252 if (is_checked_jfieldID(id)) {
253 guarantee(klass_hash_ok(k, id),
254 "Bug in native code: jfieldID class must match object");
255 } else {
256 #if 0
257 #ifndef PRODUCT
258 if (Verbose) {
259 ResourceMark rm;
260 warning("VerifyJNIFields: unverified offset %d for %s", offset, k->external_name());
261 }
262 #endif
263 #endif
264 }
265 }
266 guarantee(InstanceKlass::cast(k)->contains_field_offset(offset),
267 "Bug in native code: jfieldID offset must address interior of object");
268 }
269
270 // Implementation of JNI entries
271
272 DT_RETURN_MARK_DECL(DefineClass, jclass
273 , HOTSPOT_JNI_DEFINECLASS_RETURN(_ret_ref));
274
275 JNI_ENTRY(jclass, jni_DefineClass(JNIEnv *env, const char *name, jobject loaderRef,
276 const jbyte *buf, jsize bufLen))
277 HOTSPOT_JNI_DEFINECLASS_ENTRY(
278 env, (char*) name, loaderRef, (char*) buf, bufLen);
279
280 jclass cls = nullptr;
281 DT_RETURN_MARK(DefineClass, jclass, (const jclass&)cls);
282
283 // Class resolution will get the class name from the .class stream if the name is null.
284 TempNewSymbol class_name = name == nullptr ? nullptr :
285 SystemDictionary::class_name_symbol(name, vmSymbols::java_lang_NoClassDefFoundError(),
286 CHECK_NULL);
287
288 ResourceMark rm(THREAD);
289 ClassFileStream st((u1*)buf, bufLen, nullptr);
290 Handle class_loader (THREAD, JNIHandles::resolve(loaderRef));
291 Handle protection_domain;
292 ClassLoadInfo cl_info(protection_domain);
293 Klass* k = SystemDictionary::resolve_from_stream(&st, class_name,
294 class_loader,
295 cl_info,
296 CHECK_NULL);
297
298 if (log_is_enabled(Debug, class, resolve)) {
299 trace_class_resolution(k);
300 }
301
302 cls = (jclass)JNIHandles::make_local(THREAD, k->java_mirror());
303 return cls;
304 JNI_END
305
306
307
308 DT_RETURN_MARK_DECL(FindClass, jclass
309 , HOTSPOT_JNI_FINDCLASS_RETURN(_ret_ref));
310
311 JNI_ENTRY(jclass, jni_FindClass(JNIEnv *env, const char *name))
312 HOTSPOT_JNI_FINDCLASS_ENTRY(env, (char *)name);
313
314 jclass result = nullptr;
315 DT_RETURN_MARK(FindClass, jclass, (const jclass&)result);
316
317 // This should be ClassNotFoundException imo.
318 TempNewSymbol class_name =
319 SystemDictionary::class_name_symbol(name, vmSymbols::java_lang_NoClassDefFoundError(),
320 CHECK_NULL);
321
322 // Find calling class
323 Klass* k = thread->security_get_caller_class(0);
324 // default to the system loader when no context
325 Handle loader(THREAD, SystemDictionary::java_system_loader());
326 if (k != nullptr) {
327 // Special handling to make sure JNI_OnLoad and JNI_OnUnload are executed
328 // in the correct class context.
329 if (k->class_loader() == nullptr &&
330 k->name() == vmSymbols::jdk_internal_loader_NativeLibraries()) {
331 JavaValue result(T_OBJECT);
332 JavaCalls::call_static(&result, k,
333 vmSymbols::getFromClass_name(),
334 vmSymbols::void_class_signature(),
335 CHECK_NULL);
336 // When invoked from JNI_OnLoad, NativeLibraries::getFromClass returns
337 // a non-null Class object. When invoked from JNI_OnUnload,
338 // it will return null to indicate no context.
339 oop mirror = result.get_oop();
340 if (mirror != nullptr) {
341 Klass* fromClass = java_lang_Class::as_Klass(mirror);
342 loader = Handle(THREAD, fromClass->class_loader());
343 }
344 } else {
345 loader = Handle(THREAD, k->class_loader());
346 }
347 }
348
349 result = find_class_from_class_loader(env, class_name, true, loader, true, thread);
350
351 if (log_is_enabled(Debug, class, resolve) && result != nullptr) {
352 trace_class_resolution(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(result)));
353 }
354
355 return result;
356 JNI_END
357
358 DT_RETURN_MARK_DECL(FromReflectedMethod, jmethodID
359 , HOTSPOT_JNI_FROMREFLECTEDMETHOD_RETURN((uintptr_t)_ret_ref));
360
361 JNI_ENTRY(jmethodID, jni_FromReflectedMethod(JNIEnv *env, jobject method))
362 HOTSPOT_JNI_FROMREFLECTEDMETHOD_ENTRY(env, method);
363
364 jmethodID ret = nullptr;
365 DT_RETURN_MARK(FromReflectedMethod, jmethodID, (const jmethodID&)ret);
366
367 // method is a handle to a java.lang.reflect.Method object
368 oop reflected = JNIHandles::resolve_non_null(method);
369 oop mirror = nullptr;
370 int slot = 0;
371
372 if (reflected->klass() == vmClasses::reflect_Constructor_klass()) {
373 mirror = java_lang_reflect_Constructor::clazz(reflected);
374 slot = java_lang_reflect_Constructor::slot(reflected);
375 } else {
376 assert(reflected->klass() == vmClasses::reflect_Method_klass(), "wrong type");
377 mirror = java_lang_reflect_Method::clazz(reflected);
378 slot = java_lang_reflect_Method::slot(reflected);
379 }
380 Klass* k1 = java_lang_Class::as_Klass(mirror);
381
382 // Make sure class is initialized before handing id's out to methods
383 k1->initialize(CHECK_NULL);
384 Method* m = InstanceKlass::cast(k1)->method_with_idnum(slot);
385 ret = m==nullptr? nullptr : m->jmethod_id(); // return null if reflected method deleted
386 return ret;
387 JNI_END
388
389 DT_RETURN_MARK_DECL(FromReflectedField, jfieldID
390 , HOTSPOT_JNI_FROMREFLECTEDFIELD_RETURN((uintptr_t)_ret_ref));
391
392 JNI_ENTRY(jfieldID, jni_FromReflectedField(JNIEnv *env, jobject field))
393 HOTSPOT_JNI_FROMREFLECTEDFIELD_ENTRY(env, field);
394
395 jfieldID ret = nullptr;
396 DT_RETURN_MARK(FromReflectedField, jfieldID, (const jfieldID&)ret);
397
398 // field is a handle to a java.lang.reflect.Field object
399 oop reflected = JNIHandles::resolve_non_null(field);
400 oop mirror = java_lang_reflect_Field::clazz(reflected);
401 Klass* k1 = java_lang_Class::as_Klass(mirror);
402 int slot = java_lang_reflect_Field::slot(reflected);
403 int modifiers = java_lang_reflect_Field::modifiers(reflected);
404
405 // Make sure class is initialized before handing id's out to fields
406 k1->initialize(CHECK_NULL);
407
408 // First check if this is a static field
409 if (modifiers & JVM_ACC_STATIC) {
410 int offset = InstanceKlass::cast(k1)->field_offset( slot );
411 JNIid* id = InstanceKlass::cast(k1)->jni_id_for(offset);
412 assert(id != nullptr, "corrupt Field object");
413 DEBUG_ONLY(id->set_is_static_field_id();)
414 // A jfieldID for a static field is a JNIid specifying the field holder and the offset within the Klass*
415 ret = jfieldIDWorkaround::to_static_jfieldID(id);
416 return ret;
417 }
418
419 // The slot is the index of the field description in the field-array
420 // The jfieldID is the offset of the field within the object
421 // It may also have hash bits for k, if VerifyJNIFields is turned on.
422 int offset = InstanceKlass::cast(k1)->field_offset( slot );
423 bool is_flat = InstanceKlass::cast(k1)->field_is_flat(slot);
424 assert(InstanceKlass::cast(k1)->contains_field_offset(offset), "stay within object");
425 ret = jfieldIDWorkaround::to_instance_jfieldID(k1, offset, is_flat);
426 return ret;
427 JNI_END
428
429
430 DT_RETURN_MARK_DECL(ToReflectedMethod, jobject
431 , HOTSPOT_JNI_TOREFLECTEDMETHOD_RETURN(_ret_ref));
432
433 JNI_ENTRY(jobject, jni_ToReflectedMethod(JNIEnv *env, jclass cls, jmethodID method_id, jboolean isStatic))
434 HOTSPOT_JNI_TOREFLECTEDMETHOD_ENTRY(env, cls, (uintptr_t) method_id, isStatic);
435
436 jobject ret = nullptr;
437 DT_RETURN_MARK(ToReflectedMethod, jobject, (const jobject&)ret);
438
439 methodHandle m (THREAD, Method::resolve_jmethod_id(method_id));
440 assert(m->is_static() == (isStatic != 0), "jni_ToReflectedMethod access flags doesn't match");
441 oop reflection_method;
442 if (m->is_object_constructor()) {
443 reflection_method = Reflection::new_constructor(m, CHECK_NULL);
444 } else {
445 // Note: Static initializers can theoretically be here, if JNI users manage
446 // to get their jmethodID. Record them as plain methods.
447 reflection_method = Reflection::new_method(m, false, CHECK_NULL);
448 }
449 ret = JNIHandles::make_local(THREAD, reflection_method);
450 return ret;
451 JNI_END
452
453 DT_RETURN_MARK_DECL(GetSuperclass, jclass
454 , HOTSPOT_JNI_GETSUPERCLASS_RETURN(_ret_ref));
455
456 JNI_ENTRY(jclass, jni_GetSuperclass(JNIEnv *env, jclass sub))
457 HOTSPOT_JNI_GETSUPERCLASS_ENTRY(env, sub);
458
459 jclass obj = nullptr;
460 DT_RETURN_MARK(GetSuperclass, jclass, (const jclass&)obj);
461
462 oop mirror = JNIHandles::resolve_non_null(sub);
463 // primitive classes return null
464 if (java_lang_Class::is_primitive(mirror)) return nullptr;
465
466 // Rules of Class.getSuperClass as implemented by KLass::java_super:
467 // arrays return Object
468 // interfaces return null
469 // proper classes return Klass::super()
470 Klass* k = java_lang_Class::as_Klass(mirror);
471 if (k->is_interface()) return nullptr;
472
473 // return mirror for superclass
474 Klass* super = k->java_super();
475 // super2 is the value computed by the compiler's getSuperClass intrinsic:
476 DEBUG_ONLY(Klass* super2 = ( k->is_array_klass()
477 ? vmClasses::Object_klass()
478 : k->super() ) );
479 assert(super == super2,
480 "java_super computation depends on interface, array, other super");
481 obj = (super == nullptr) ? nullptr : (jclass) JNIHandles::make_local(THREAD, super->java_mirror());
482 return obj;
483 JNI_END
484
485 JNI_ENTRY_NO_PRESERVE(jboolean, jni_IsAssignableFrom(JNIEnv *env, jclass sub, jclass super))
486 HOTSPOT_JNI_ISASSIGNABLEFROM_ENTRY(env, sub, super);
487
488 oop sub_mirror = JNIHandles::resolve_non_null(sub);
489 oop super_mirror = JNIHandles::resolve_non_null(super);
490 if (java_lang_Class::is_primitive(sub_mirror) ||
491 java_lang_Class::is_primitive(super_mirror)) {
492 jboolean ret = (sub_mirror == super_mirror);
493
494 HOTSPOT_JNI_ISASSIGNABLEFROM_RETURN(ret);
495 return ret;
496 }
497 Klass* sub_klass = java_lang_Class::as_Klass(sub_mirror);
498 Klass* super_klass = java_lang_Class::as_Klass(super_mirror);
499 assert(sub_klass != nullptr && super_klass != nullptr, "invalid arguments to jni_IsAssignableFrom");
500 jboolean ret = sub_klass->is_subtype_of(super_klass) ?
501 JNI_TRUE : JNI_FALSE;
502
503 HOTSPOT_JNI_ISASSIGNABLEFROM_RETURN(ret);
504 return ret;
505 JNI_END
506
507
508 DT_RETURN_MARK_DECL(Throw, jint
509 , HOTSPOT_JNI_THROW_RETURN(_ret_ref));
510
511 JNI_ENTRY(jint, jni_Throw(JNIEnv *env, jthrowable obj))
512 HOTSPOT_JNI_THROW_ENTRY(env, obj);
513
514 jint ret = JNI_OK;
515 DT_RETURN_MARK(Throw, jint, (const jint&)ret);
516
517 THROW_OOP_(JNIHandles::resolve(obj), JNI_OK);
518 ShouldNotReachHere();
519 return 0; // Mute compiler.
520 JNI_END
521
522
523 DT_RETURN_MARK_DECL(ThrowNew, jint
524 , HOTSPOT_JNI_THROWNEW_RETURN(_ret_ref));
525
526 JNI_ENTRY(jint, jni_ThrowNew(JNIEnv *env, jclass clazz, const char *message))
527 HOTSPOT_JNI_THROWNEW_ENTRY(env, clazz, (char *) message);
528
529 jint ret = JNI_OK;
530 DT_RETURN_MARK(ThrowNew, jint, (const jint&)ret);
531
532 InstanceKlass* k = java_lang_Class::as_InstanceKlass(JNIHandles::resolve_non_null(clazz));
533 Symbol* name = k->name();
534 Handle class_loader (THREAD, k->class_loader());
535 THROW_MSG_LOADER_(name, (char *)message, class_loader, JNI_OK);
536 ShouldNotReachHere();
537 return 0; // Mute compiler.
538 JNI_END
539
540
541 // JNI functions only transform a pending async exception to a synchronous
542 // exception in ExceptionOccurred and ExceptionCheck calls, since
543 // delivering an async exception in other places won't change the native
544 // code's control flow and would be harmful when native code further calls
545 // JNI functions with a pending exception. Async exception is also checked
546 // during the call, so ExceptionOccurred/ExceptionCheck won't return
547 // false but deliver the async exception at the very end during
548 // state transition.
549
550 static void jni_check_async_exceptions(JavaThread *thread) {
551 assert(thread == Thread::current(), "must be itself");
552 if (thread->has_async_exception_condition()) {
553 SafepointMechanism::process_if_requested_with_exit_check(thread, true /* check asyncs */);
554 }
555 }
556
557 JNI_ENTRY_NO_PRESERVE(jthrowable, jni_ExceptionOccurred(JNIEnv *env))
558 HOTSPOT_JNI_EXCEPTIONOCCURRED_ENTRY(env);
559
560 jni_check_async_exceptions(thread);
561 oop exception = thread->pending_exception();
562 jthrowable ret = (jthrowable) JNIHandles::make_local(THREAD, exception);
563
564 HOTSPOT_JNI_EXCEPTIONOCCURRED_RETURN(ret);
565 return ret;
566 JNI_END
567
568
569 JNI_ENTRY_NO_PRESERVE(void, jni_ExceptionDescribe(JNIEnv *env))
570 HOTSPOT_JNI_EXCEPTIONDESCRIBE_ENTRY(env);
571
572 if (thread->has_pending_exception()) {
573 Handle ex(thread, thread->pending_exception());
574 thread->clear_pending_exception();
575 jio_fprintf(defaultStream::error_stream(), "Exception ");
576 if (thread != nullptr && thread->threadObj() != nullptr) {
577 ResourceMark rm(THREAD);
578 jio_fprintf(defaultStream::error_stream(),
579 "in thread \"%s\" ", thread->name());
580 }
581 if (ex->is_a(vmClasses::Throwable_klass())) {
582 JavaValue result(T_VOID);
583 JavaCalls::call_virtual(&result,
584 ex,
585 vmClasses::Throwable_klass(),
586 vmSymbols::printStackTrace_name(),
587 vmSymbols::void_method_signature(),
588 THREAD);
589 // If an exception is thrown in the call it gets thrown away. Not much
590 // we can do with it. The native code that calls this, does not check
591 // for the exception - hence, it might still be in the thread when DestroyVM gets
592 // called, potentially causing a few asserts to trigger - since no pending exception
593 // is expected.
594 CLEAR_PENDING_EXCEPTION;
595 } else {
596 ResourceMark rm(THREAD);
597 jio_fprintf(defaultStream::error_stream(),
598 ". Uncaught exception of type %s.",
599 ex->klass()->external_name());
600 }
601 }
602
603 HOTSPOT_JNI_EXCEPTIONDESCRIBE_RETURN();
604 JNI_END
605
606
607 JNI_ENTRY_NO_PRESERVE(void, jni_ExceptionClear(JNIEnv *env))
608 HOTSPOT_JNI_EXCEPTIONCLEAR_ENTRY(env);
609
610 // The jni code might be using this API to clear java thrown exception.
611 // So just mark jvmti thread exception state as exception caught.
612 JvmtiThreadState *state = JavaThread::current()->jvmti_thread_state();
613 if (state != nullptr && state->is_exception_detected()) {
614 state->set_exception_caught();
615 }
616 thread->clear_pending_exception();
617
618 HOTSPOT_JNI_EXCEPTIONCLEAR_RETURN();
619 JNI_END
620
621
622 JNI_ENTRY(void, jni_FatalError(JNIEnv *env, const char *msg))
623 HOTSPOT_JNI_FATALERROR_ENTRY(env, (char *) msg);
624
625 tty->print_cr("FATAL ERROR in native method: %s", msg);
626 thread->print_jni_stack();
627 os::abort(); // Dump core and abort
628 JNI_END
629
630
631 JNI_ENTRY(jint, jni_PushLocalFrame(JNIEnv *env, jint capacity))
632 HOTSPOT_JNI_PUSHLOCALFRAME_ENTRY(env, capacity);
633
634 //%note jni_11
635 if (capacity < 0 ||
636 ((MaxJNILocalCapacity > 0) && (capacity > MaxJNILocalCapacity))) {
637 HOTSPOT_JNI_PUSHLOCALFRAME_RETURN((uint32_t)JNI_ERR);
638 return JNI_ERR;
639 }
640
641 thread->push_jni_handle_block();
642 jint ret = JNI_OK;
643 HOTSPOT_JNI_PUSHLOCALFRAME_RETURN(ret);
644 return ret;
645 JNI_END
646
647
648 JNI_ENTRY(jobject, jni_PopLocalFrame(JNIEnv *env, jobject result))
649 HOTSPOT_JNI_POPLOCALFRAME_ENTRY(env, result);
650
651 //%note jni_11
652 Handle result_handle(thread, JNIHandles::resolve(result));
653 JNIHandleBlock* old_handles = thread->active_handles();
654 JNIHandleBlock* new_handles = old_handles->pop_frame_link();
655 if (new_handles != nullptr) {
656 // As a sanity check we only release the handle blocks if the pop_frame_link is not null.
657 // This way code will still work if PopLocalFrame is called without a corresponding
658 // PushLocalFrame call. Note that we set the pop_frame_link to null explicitly, otherwise
659 // the release_block call will release the blocks.
660 thread->set_active_handles(new_handles);
661 old_handles->set_pop_frame_link(nullptr); // clear link we won't release new_handles below
662 JNIHandleBlock::release_block(old_handles, thread); // may block
663 result = JNIHandles::make_local(thread, result_handle());
664 }
665 HOTSPOT_JNI_POPLOCALFRAME_RETURN(result);
666 return result;
667 JNI_END
668
669
670 JNI_ENTRY(jobject, jni_NewGlobalRef(JNIEnv *env, jobject ref))
671 HOTSPOT_JNI_NEWGLOBALREF_ENTRY(env, ref);
672
673 Handle ref_handle(thread, JNIHandles::resolve(ref));
674 jobject ret = JNIHandles::make_global(ref_handle, AllocFailStrategy::RETURN_NULL);
675
676 HOTSPOT_JNI_NEWGLOBALREF_RETURN(ret);
677 return ret;
678 JNI_END
679
680 // Must be JNI_ENTRY (with HandleMark)
681 JNI_ENTRY_NO_PRESERVE(void, jni_DeleteGlobalRef(JNIEnv *env, jobject ref))
682 HOTSPOT_JNI_DELETEGLOBALREF_ENTRY(env, ref);
683
684 JNIHandles::destroy_global(ref);
685
686 HOTSPOT_JNI_DELETEGLOBALREF_RETURN();
687 JNI_END
688
689 JNI_ENTRY_NO_PRESERVE(void, jni_DeleteLocalRef(JNIEnv *env, jobject obj))
690 HOTSPOT_JNI_DELETELOCALREF_ENTRY(env, obj);
691
692 JNIHandles::destroy_local(obj);
693
694 HOTSPOT_JNI_DELETELOCALREF_RETURN();
695 JNI_END
696
697 JNI_ENTRY_NO_PRESERVE(jboolean, jni_IsSameObject(JNIEnv *env, jobject r1, jobject r2))
698 HOTSPOT_JNI_ISSAMEOBJECT_ENTRY(env, r1, r2);
699
700 jboolean ret = JNIHandles::is_same_object(r1, r2) ? JNI_TRUE : JNI_FALSE;
701
702 HOTSPOT_JNI_ISSAMEOBJECT_RETURN(ret);
703 return ret;
704 JNI_END
705
706
707 JNI_ENTRY(jobject, jni_NewLocalRef(JNIEnv *env, jobject ref))
708 HOTSPOT_JNI_NEWLOCALREF_ENTRY(env, ref);
709
710 jobject ret = JNIHandles::make_local(THREAD, JNIHandles::resolve(ref),
711 AllocFailStrategy::RETURN_NULL);
712
713 HOTSPOT_JNI_NEWLOCALREF_RETURN(ret);
714 return ret;
715 JNI_END
716
717 JNI_LEAF(jint, jni_EnsureLocalCapacity(JNIEnv *env, jint capacity))
718 HOTSPOT_JNI_ENSURELOCALCAPACITY_ENTRY(env, capacity);
719
720 jint ret;
721 if (capacity >= 0 &&
722 ((MaxJNILocalCapacity <= 0) || (capacity <= MaxJNILocalCapacity))) {
723 ret = JNI_OK;
724 } else {
725 ret = JNI_ERR;
726 }
727
728 HOTSPOT_JNI_ENSURELOCALCAPACITY_RETURN(ret);
729 return ret;
730 JNI_END
731
732 // Return the Handle Type
733 JNI_LEAF(jobjectRefType, jni_GetObjectRefType(JNIEnv *env, jobject obj))
734 HOTSPOT_JNI_GETOBJECTREFTYPE_ENTRY(env, obj);
735
736 jobjectRefType ret = JNIInvalidRefType;
737 if (obj != nullptr) {
738 ret = JNIHandles::handle_type(thread, obj);
739 }
740
741 HOTSPOT_JNI_GETOBJECTREFTYPE_RETURN((void *) ret);
742 return ret;
743 JNI_END
744
745
746 class JNI_ArgumentPusher : public SignatureIterator {
747 protected:
748 JavaCallArguments* _arguments;
749
750 void push_int(jint x) { _arguments->push_int(x); }
751 void push_long(jlong x) { _arguments->push_long(x); }
752 void push_float(jfloat x) { _arguments->push_float(x); }
753 void push_double(jdouble x) { _arguments->push_double(x); }
754 void push_object(jobject x) { _arguments->push_jobject(x); }
755
756 void push_boolean(jboolean b) {
757 // Normalize boolean arguments from native code by converting 1-255 to JNI_TRUE and
758 // 0 to JNI_FALSE. Boolean return values from native are normalized the same in
759 // TemplateInterpreterGenerator::generate_result_handler_for and
760 // SharedRuntime::generate_native_wrapper.
761 push_int(b == 0 ? JNI_FALSE : JNI_TRUE);
762 }
763
764 JNI_ArgumentPusher(Method* method)
765 : SignatureIterator(method->signature(),
766 Fingerprinter(methodHandle(Thread::current(), method)).fingerprint())
767 {
768 _arguments = nullptr;
769 }
770
771 public:
772 virtual void push_arguments_on(JavaCallArguments* arguments) = 0;
773 };
774
775
776 class JNI_ArgumentPusherVaArg : public JNI_ArgumentPusher {
777 va_list _ap;
778
779 void set_ap(va_list rap) {
780 va_copy(_ap, rap);
781 }
782
783 friend class SignatureIterator; // so do_parameters_on can call do_type
784 void do_type(BasicType type) {
785 switch (type) {
786 // these are coerced to int when using va_arg
787 case T_BYTE:
788 case T_CHAR:
789 case T_SHORT:
790 case T_INT: push_int(va_arg(_ap, jint)); break;
791 case T_BOOLEAN: push_boolean((jboolean) va_arg(_ap, jint)); break;
792
793 // each of these paths is exercised by the various jck Call[Static,Nonvirtual,][Void,Int,..]Method[A,V,] tests
794
795 case T_LONG: push_long(va_arg(_ap, jlong)); break;
796 // float is coerced to double w/ va_arg
797 case T_FLOAT: push_float((jfloat) va_arg(_ap, jdouble)); break;
798 case T_DOUBLE: push_double(va_arg(_ap, jdouble)); break;
799
800 case T_ARRAY:
801 case T_OBJECT: push_object(va_arg(_ap, jobject)); break;
802 default: ShouldNotReachHere();
803 }
804 }
805
806 public:
807 JNI_ArgumentPusherVaArg(jmethodID method_id, va_list rap)
808 : JNI_ArgumentPusher(Method::resolve_jmethod_id(method_id)) {
809 set_ap(rap);
810 }
811
812 ~JNI_ArgumentPusherVaArg() {
813 va_end(_ap);
814 }
815
816 virtual void push_arguments_on(JavaCallArguments* arguments) {
817 _arguments = arguments;
818 do_parameters_on(this);
819 }
820 };
821
822
823 class JNI_ArgumentPusherArray : public JNI_ArgumentPusher {
824 protected:
825 const jvalue *_ap;
826
827 inline void set_ap(const jvalue *rap) { _ap = rap; }
828
829 friend class SignatureIterator; // so do_parameters_on can call do_type
830 void do_type(BasicType type) {
831 switch (type) {
832 case T_CHAR: push_int((_ap++)->c); break;
833 case T_SHORT: push_int((_ap++)->s); break;
834 case T_BYTE: push_int((_ap++)->b); break;
835 case T_INT: push_int((_ap++)->i); break;
836 case T_BOOLEAN: push_boolean((_ap++)->z); break;
837 case T_LONG: push_long((_ap++)->j); break;
838 case T_FLOAT: push_float((_ap++)->f); break;
839 case T_DOUBLE: push_double((_ap++)->d); break;
840 case T_ARRAY:
841 case T_OBJECT: push_object((_ap++)->l); break;
842 default: ShouldNotReachHere();
843 }
844 }
845
846 public:
847 JNI_ArgumentPusherArray(jmethodID method_id, const jvalue *rap)
848 : JNI_ArgumentPusher(Method::resolve_jmethod_id(method_id)) {
849 set_ap(rap);
850 }
851
852 virtual void push_arguments_on(JavaCallArguments* arguments) {
853 _arguments = arguments;
854 do_parameters_on(this);
855 }
856 };
857
858
859 enum JNICallType {
860 JNI_STATIC,
861 JNI_VIRTUAL,
862 JNI_NONVIRTUAL
863 };
864
865
866
867 static void jni_invoke_static(JNIEnv *env, JavaValue* result, jobject receiver, JNICallType call_type, jmethodID method_id, JNI_ArgumentPusher *args, TRAPS) {
868 methodHandle method(THREAD, Method::resolve_jmethod_id(method_id));
869
870 // Create object to hold arguments for the JavaCall, and associate it with
871 // the jni parser
872 ResourceMark rm(THREAD);
873 int number_of_parameters = method->size_of_parameters();
874 JavaCallArguments java_args(number_of_parameters);
875
876 assert(method->is_static(), "method should be static");
877
878 // Fill out JavaCallArguments object
879 args->push_arguments_on(&java_args);
880 // Initialize result type
881 result->set_type(args->return_type());
882
883 // Invoke the method. Result is returned as oop.
884 JavaCalls::call(result, method, &java_args, CHECK);
885
886 // Convert result
887 if (is_reference_type(result->get_type())) {
888 result->set_jobject(JNIHandles::make_local(THREAD, result->get_oop()));
889 }
890 }
891
892
893 static void jni_invoke_nonstatic(JNIEnv *env, JavaValue* result, jobject receiver, JNICallType call_type, jmethodID method_id, JNI_ArgumentPusher *args, TRAPS) {
894 oop recv = JNIHandles::resolve(receiver);
895 if (recv == nullptr) {
896 THROW(vmSymbols::java_lang_NullPointerException());
897 }
898 Handle h_recv(THREAD, recv);
899
900 int number_of_parameters;
901 Method* selected_method;
902 {
903 Method* m = Method::resolve_jmethod_id(method_id);
904 number_of_parameters = m->size_of_parameters();
905 InstanceKlass* holder = m->method_holder();
906 if (call_type != JNI_VIRTUAL) {
907 selected_method = m;
908 } else if (!m->has_itable_index()) {
909 // non-interface call -- for that little speed boost, don't handlize
910 DEBUG_ONLY(NoSafepointVerifier nosafepoint;)
911 // jni_GetMethodID makes sure class is linked and initialized
912 // so m should have a valid vtable index.
913 assert(m->valid_vtable_index(), "no valid vtable index");
914 int vtbl_index = m->vtable_index();
915 if (vtbl_index != Method::nonvirtual_vtable_index) {
916 selected_method = h_recv->klass()->method_at_vtable(vtbl_index);
917 } else {
918 // final method
919 selected_method = m;
920 }
921 } else {
922 // interface call
923 int itbl_index = m->itable_index();
924 Klass* k = h_recv->klass();
925 selected_method = InstanceKlass::cast(k)->method_at_itable(holder, itbl_index, CHECK);
926 }
927 }
928
929 if (selected_method->is_abstract()) {
930 ResourceMark rm(THREAD);
931 THROW_MSG(vmSymbols::java_lang_AbstractMethodError(), selected_method->name()->as_C_string());
932 }
933
934 methodHandle method(THREAD, selected_method);
935
936 // Create object to hold arguments for the JavaCall, and associate it with
937 // the jni parser
938 ResourceMark rm(THREAD);
939 JavaCallArguments java_args(number_of_parameters);
940
941 // handle arguments
942 assert(!method->is_static(), "method %s should not be static", method->name_and_sig_as_C_string());
943 java_args.push_oop(h_recv); // Push jobject handle
944
945 // Fill out JavaCallArguments object
946 args->push_arguments_on(&java_args);
947 // Initialize result type
948 result->set_type(args->return_type());
949
950 // Invoke the method. Result is returned as oop.
951 JavaCalls::call(result, method, &java_args, CHECK);
952
953 // Convert result
954 if (is_reference_type(result->get_type())) {
955 result->set_jobject(JNIHandles::make_local(THREAD, result->get_oop()));
956 }
957 }
958
959 DT_RETURN_MARK_DECL(AllocObject, jobject
960 , HOTSPOT_JNI_ALLOCOBJECT_RETURN(_ret_ref));
961
962 JNI_ENTRY(jobject, jni_AllocObject(JNIEnv *env, jclass clazz))
963 HOTSPOT_JNI_ALLOCOBJECT_ENTRY(env, clazz);
964
965 jobject ret = nullptr;
966 DT_RETURN_MARK(AllocObject, jobject, (const jobject&)ret);
967
968 oop clazzoop = JNIHandles::resolve_non_null(clazz);
969 Klass* k = java_lang_Class::as_Klass(clazzoop);
970 if (k == nullptr || k->is_inline_klass()) {
971 ResourceMark rm(THREAD);
972 THROW_(vmSymbols::java_lang_InstantiationException(), nullptr);
973 }
974 instanceOop i = InstanceKlass::allocate_instance(clazzoop, CHECK_NULL);
975 ret = JNIHandles::make_local(THREAD, i);
976 return ret;
977 JNI_END
978
979 DT_RETURN_MARK_DECL(NewObjectA, jobject
980 , HOTSPOT_JNI_NEWOBJECTA_RETURN(_ret_ref));
981
982 JNI_ENTRY(jobject, jni_NewObjectA(JNIEnv *env, jclass clazz, jmethodID methodID, const jvalue *args))
983 HOTSPOT_JNI_NEWOBJECTA_ENTRY(env, clazz, (uintptr_t) methodID);
984
985 jobject obj = nullptr;
986 DT_RETURN_MARK(NewObjectA, jobject, (const jobject&)obj);
987
988 oop clazzoop = JNIHandles::resolve_non_null(clazz);
989 Klass* k = java_lang_Class::as_Klass(clazzoop);
990 if (k == nullptr) {
991 ResourceMark rm(THREAD);
992 THROW_(vmSymbols::java_lang_InstantiationException(), nullptr);
993 }
994
995 instanceOop i = InstanceKlass::allocate_instance(clazzoop, CHECK_NULL);
996 obj = JNIHandles::make_local(THREAD, i);
997 JavaValue jvalue(T_VOID);
998 JNI_ArgumentPusherArray ap(methodID, args);
999 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_NULL);
1000
1001 return obj;
1002 JNI_END
1003
1004
1005 DT_RETURN_MARK_DECL(NewObjectV, jobject
1006 , HOTSPOT_JNI_NEWOBJECTV_RETURN(_ret_ref));
1007
1008 JNI_ENTRY(jobject, jni_NewObjectV(JNIEnv *env, jclass clazz, jmethodID methodID, va_list args))
1009 HOTSPOT_JNI_NEWOBJECTV_ENTRY(env, clazz, (uintptr_t) methodID);
1010
1011 jobject obj = nullptr;
1012 DT_RETURN_MARK(NewObjectV, jobject, (const jobject&)obj);
1013
1014 oop clazzoop = JNIHandles::resolve_non_null(clazz);
1015 Klass* k = java_lang_Class::as_Klass(clazzoop);
1016 if (k == nullptr) {
1017 ResourceMark rm(THREAD);
1018 THROW_(vmSymbols::java_lang_InstantiationException(), nullptr);
1019 }
1020
1021 instanceOop i = InstanceKlass::allocate_instance(clazzoop, CHECK_NULL);
1022 obj = JNIHandles::make_local(THREAD, i);
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
1027 return obj;
1028 JNI_END
1029
1030
1031 DT_RETURN_MARK_DECL(NewObject, jobject
1032 , HOTSPOT_JNI_NEWOBJECT_RETURN(_ret_ref));
1033
1034 JNI_ENTRY(jobject, jni_NewObject(JNIEnv *env, jclass clazz, jmethodID methodID, ...))
1035 HOTSPOT_JNI_NEWOBJECT_ENTRY(env, clazz, (uintptr_t) methodID);
1036
1037 jobject obj = nullptr;
1038 DT_RETURN_MARK(NewObject, jobject, (const jobject&)obj);
1039
1040 oop clazzoop = JNIHandles::resolve_non_null(clazz);
1041 Klass* k = java_lang_Class::as_Klass(clazzoop);
1042 if (k == nullptr) {
1043 ResourceMark rm(THREAD);
1044 THROW_(vmSymbols::java_lang_InstantiationException(), nullptr);
1045 }
1046
1047 instanceOop i = InstanceKlass::allocate_instance(clazzoop, CHECK_NULL);
1048 obj = JNIHandles::make_local(THREAD, i);
1049 va_list args;
1050 va_start(args, methodID);
1051 JavaValue jvalue(T_VOID);
1052 JNI_ArgumentPusherVaArg ap(methodID, args);
1053 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_NULL);
1054 va_end(args);
1055
1056 return obj;
1057 JNI_END
1058
1059
1060 JNI_ENTRY(jclass, jni_GetObjectClass(JNIEnv *env, jobject obj))
1061 HOTSPOT_JNI_GETOBJECTCLASS_ENTRY(env, obj);
1062
1063 Klass* k = JNIHandles::resolve_non_null(obj)->klass();
1064 jclass ret =
1065 (jclass) JNIHandles::make_local(THREAD, k->java_mirror());
1066
1067 HOTSPOT_JNI_GETOBJECTCLASS_RETURN(ret);
1068 return ret;
1069 JNI_END
1070
1071 JNI_ENTRY_NO_PRESERVE(jboolean, jni_IsInstanceOf(JNIEnv *env, jobject obj, jclass clazz))
1072 HOTSPOT_JNI_ISINSTANCEOF_ENTRY(env, obj, clazz);
1073
1074 jboolean ret = JNI_TRUE;
1075 if (obj != nullptr) {
1076 ret = JNI_FALSE;
1077 Klass* k = java_lang_Class::as_Klass(
1078 JNIHandles::resolve_non_null(clazz));
1079 if (k != nullptr) {
1080 ret = JNIHandles::resolve_non_null(obj)->is_a(k) ? JNI_TRUE : JNI_FALSE;
1081 }
1082 }
1083
1084 HOTSPOT_JNI_ISINSTANCEOF_RETURN(ret);
1085 return ret;
1086 JNI_END
1087
1088
1089 static jmethodID get_method_id(JNIEnv *env, jclass clazz, const char *name_str,
1090 const char *sig, bool is_static, TRAPS) {
1091 // %%%% This code should probably just call into a method in the LinkResolver
1092 //
1093 // The class should have been loaded (we have an instance of the class
1094 // passed in) so the method and signature should already be in the symbol
1095 // table. If they're not there, the method doesn't exist.
1096 const char *name_to_probe = (name_str == nullptr)
1097 ? vmSymbols::object_initializer_name()->as_C_string()
1098 : name_str;
1099 TempNewSymbol name = SymbolTable::probe(name_to_probe, (int)strlen(name_to_probe));
1100 TempNewSymbol signature = SymbolTable::probe(sig, (int)strlen(sig));
1101
1102 if (name == nullptr || signature == nullptr) {
1103 THROW_MSG_NULL(vmSymbols::java_lang_NoSuchMethodError(), name_str);
1104 }
1105
1106 oop mirror = JNIHandles::resolve_non_null(clazz);
1107 Klass* klass = java_lang_Class::as_Klass(mirror);
1108
1109 // Throw a NoSuchMethodError exception if we have an instance of a
1110 // primitive java.lang.Class
1111 if (java_lang_Class::is_primitive(mirror)) {
1112 ResourceMark rm(THREAD);
1113 THROW_MSG_NULL(vmSymbols::java_lang_NoSuchMethodError(), err_msg("%s%s.%s%s", is_static ? "static " : "", klass->signature_name(), name_str, sig));
1114 }
1115
1116 // Make sure class is linked and initialized before handing id's out to
1117 // Method*s.
1118 klass->initialize(CHECK_NULL);
1119
1120 Method* m;
1121 if (name == vmSymbols::object_initializer_name() ||
1122 name == vmSymbols::class_initializer_name()) {
1123 // Never search superclasses for constructors
1124 if (klass->is_instance_klass()) {
1125 m = InstanceKlass::cast(klass)->find_method(name, signature);
1126 } else {
1127 m = nullptr;
1128 }
1129 } else {
1130 m = klass->lookup_method(name, signature);
1131 if (m == nullptr && klass->is_instance_klass()) {
1132 m = InstanceKlass::cast(klass)->lookup_method_in_ordered_interfaces(name, signature);
1133 }
1134 }
1135 if (m == nullptr || (m->is_static() != is_static)) {
1136 ResourceMark rm(THREAD);
1137 THROW_MSG_NULL(vmSymbols::java_lang_NoSuchMethodError(), err_msg("%s%s.%s%s", is_static ? "static " : "", klass->signature_name(), name_str, sig));
1138 }
1139 return m->jmethod_id();
1140 }
1141
1142
1143 JNI_ENTRY(jmethodID, jni_GetMethodID(JNIEnv *env, jclass clazz,
1144 const char *name, const char *sig))
1145 HOTSPOT_JNI_GETMETHODID_ENTRY(env, clazz, (char *) name, (char *) sig);
1146 jmethodID ret = get_method_id(env, clazz, name, sig, false, thread);
1147 HOTSPOT_JNI_GETMETHODID_RETURN((uintptr_t) ret);
1148 return ret;
1149 JNI_END
1150
1151
1152 JNI_ENTRY(jmethodID, jni_GetStaticMethodID(JNIEnv *env, jclass clazz,
1153 const char *name, const char *sig))
1154 HOTSPOT_JNI_GETSTATICMETHODID_ENTRY(env, (char *) clazz, (char *) name, (char *)sig);
1155 jmethodID ret = get_method_id(env, clazz, name, sig, true, thread);
1156 HOTSPOT_JNI_GETSTATICMETHODID_RETURN((uintptr_t) ret);
1157 return ret;
1158 JNI_END
1159
1160
1161
1162 //
1163 // Calling Methods
1164 //
1165
1166
1167 #define DEFINE_CALLMETHOD(ResultType, Result, Tag \
1168 , EntryProbe, ReturnProbe) \
1169 \
1170 DT_RETURN_MARK_DECL_FOR(Result, Call##Result##Method, ResultType \
1171 , ReturnProbe); \
1172 \
1173 JNI_ENTRY(ResultType, \
1174 jni_Call##Result##Method(JNIEnv *env, jobject obj, jmethodID methodID, ...)) \
1175 \
1176 EntryProbe; \
1177 ResultType ret{}; \
1178 DT_RETURN_MARK_FOR(Result, Call##Result##Method, ResultType, \
1179 (const ResultType&)ret);\
1180 \
1181 va_list args; \
1182 va_start(args, methodID); \
1183 JavaValue jvalue(Tag); \
1184 JNI_ArgumentPusherVaArg ap(methodID, args); \
1185 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK_(ResultType{})); \
1186 va_end(args); \
1187 ret = jvalue.get_##ResultType(); \
1188 return ret;\
1189 JNI_END
1190
1191 // the runtime type of subword integral basic types is integer
1192 DEFINE_CALLMETHOD(jboolean, Boolean, T_BOOLEAN
1193 , HOTSPOT_JNI_CALLBOOLEANMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1194 HOTSPOT_JNI_CALLBOOLEANMETHOD_RETURN(_ret_ref))
1195 DEFINE_CALLMETHOD(jbyte, Byte, T_BYTE
1196 , HOTSPOT_JNI_CALLBYTEMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1197 HOTSPOT_JNI_CALLBYTEMETHOD_RETURN(_ret_ref))
1198 DEFINE_CALLMETHOD(jchar, Char, T_CHAR
1199 , HOTSPOT_JNI_CALLCHARMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1200 HOTSPOT_JNI_CALLCHARMETHOD_RETURN(_ret_ref))
1201 DEFINE_CALLMETHOD(jshort, Short, T_SHORT
1202 , HOTSPOT_JNI_CALLSHORTMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1203 HOTSPOT_JNI_CALLSHORTMETHOD_RETURN(_ret_ref))
1204
1205 DEFINE_CALLMETHOD(jobject, Object, T_OBJECT
1206 , HOTSPOT_JNI_CALLOBJECTMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1207 HOTSPOT_JNI_CALLOBJECTMETHOD_RETURN(_ret_ref))
1208 DEFINE_CALLMETHOD(jint, Int, T_INT,
1209 HOTSPOT_JNI_CALLINTMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1210 HOTSPOT_JNI_CALLINTMETHOD_RETURN(_ret_ref))
1211 DEFINE_CALLMETHOD(jlong, Long, T_LONG
1212 , HOTSPOT_JNI_CALLLONGMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1213 HOTSPOT_JNI_CALLLONGMETHOD_RETURN(_ret_ref))
1214 // Float and double probes don't return value because dtrace doesn't currently support it
1215 DEFINE_CALLMETHOD(jfloat, Float, T_FLOAT
1216 , HOTSPOT_JNI_CALLFLOATMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1217 HOTSPOT_JNI_CALLFLOATMETHOD_RETURN())
1218 DEFINE_CALLMETHOD(jdouble, Double, T_DOUBLE
1219 , HOTSPOT_JNI_CALLDOUBLEMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1220 HOTSPOT_JNI_CALLDOUBLEMETHOD_RETURN())
1221
1222 #define DEFINE_CALLMETHODV(ResultType, Result, Tag \
1223 , EntryProbe, ReturnProbe) \
1224 \
1225 DT_RETURN_MARK_DECL_FOR(Result, Call##Result##MethodV, ResultType \
1226 , ReturnProbe); \
1227 \
1228 JNI_ENTRY(ResultType, \
1229 jni_Call##Result##MethodV(JNIEnv *env, jobject obj, jmethodID methodID, va_list args)) \
1230 \
1231 EntryProbe;\
1232 ResultType ret{}; \
1233 DT_RETURN_MARK_FOR(Result, Call##Result##MethodV, ResultType, \
1234 (const ResultType&)ret);\
1235 \
1236 JavaValue jvalue(Tag); \
1237 JNI_ArgumentPusherVaArg ap(methodID, args); \
1238 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK_(ResultType{})); \
1239 ret = jvalue.get_##ResultType(); \
1240 return ret;\
1241 JNI_END
1242
1243 // the runtime type of subword integral basic types is integer
1244 DEFINE_CALLMETHODV(jboolean, Boolean, T_BOOLEAN
1245 , HOTSPOT_JNI_CALLBOOLEANMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1246 HOTSPOT_JNI_CALLBOOLEANMETHODV_RETURN(_ret_ref))
1247 DEFINE_CALLMETHODV(jbyte, Byte, T_BYTE
1248 , HOTSPOT_JNI_CALLBYTEMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1249 HOTSPOT_JNI_CALLBYTEMETHODV_RETURN(_ret_ref))
1250 DEFINE_CALLMETHODV(jchar, Char, T_CHAR
1251 , HOTSPOT_JNI_CALLCHARMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1252 HOTSPOT_JNI_CALLCHARMETHODV_RETURN(_ret_ref))
1253 DEFINE_CALLMETHODV(jshort, Short, T_SHORT
1254 , HOTSPOT_JNI_CALLSHORTMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1255 HOTSPOT_JNI_CALLSHORTMETHODV_RETURN(_ret_ref))
1256
1257 DEFINE_CALLMETHODV(jobject, Object, T_OBJECT
1258 , HOTSPOT_JNI_CALLOBJECTMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1259 HOTSPOT_JNI_CALLOBJECTMETHODV_RETURN(_ret_ref))
1260 DEFINE_CALLMETHODV(jint, Int, T_INT,
1261 HOTSPOT_JNI_CALLINTMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1262 HOTSPOT_JNI_CALLINTMETHODV_RETURN(_ret_ref))
1263 DEFINE_CALLMETHODV(jlong, Long, T_LONG
1264 , HOTSPOT_JNI_CALLLONGMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1265 HOTSPOT_JNI_CALLLONGMETHODV_RETURN(_ret_ref))
1266 // Float and double probes don't return value because dtrace doesn't currently support it
1267 DEFINE_CALLMETHODV(jfloat, Float, T_FLOAT
1268 , HOTSPOT_JNI_CALLFLOATMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1269 HOTSPOT_JNI_CALLFLOATMETHODV_RETURN())
1270 DEFINE_CALLMETHODV(jdouble, Double, T_DOUBLE
1271 , HOTSPOT_JNI_CALLDOUBLEMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1272 HOTSPOT_JNI_CALLDOUBLEMETHODV_RETURN())
1273
1274 #define DEFINE_CALLMETHODA(ResultType, Result, Tag \
1275 , EntryProbe, ReturnProbe) \
1276 \
1277 DT_RETURN_MARK_DECL_FOR(Result, Call##Result##MethodA, ResultType \
1278 , ReturnProbe); \
1279 \
1280 JNI_ENTRY(ResultType, \
1281 jni_Call##Result##MethodA(JNIEnv *env, jobject obj, jmethodID methodID, const jvalue *args)) \
1282 EntryProbe; \
1283 ResultType ret{}; \
1284 DT_RETURN_MARK_FOR(Result, Call##Result##MethodA, ResultType, \
1285 (const ResultType&)ret);\
1286 \
1287 JavaValue jvalue(Tag); \
1288 JNI_ArgumentPusherArray ap(methodID, args); \
1289 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK_(ResultType{})); \
1290 ret = jvalue.get_##ResultType(); \
1291 return ret;\
1292 JNI_END
1293
1294 // the runtime type of subword integral basic types is integer
1295 DEFINE_CALLMETHODA(jboolean, Boolean, T_BOOLEAN
1296 , HOTSPOT_JNI_CALLBOOLEANMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1297 HOTSPOT_JNI_CALLBOOLEANMETHODA_RETURN(_ret_ref))
1298 DEFINE_CALLMETHODA(jbyte, Byte, T_BYTE
1299 , HOTSPOT_JNI_CALLBYTEMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1300 HOTSPOT_JNI_CALLBYTEMETHODA_RETURN(_ret_ref))
1301 DEFINE_CALLMETHODA(jchar, Char, T_CHAR
1302 , HOTSPOT_JNI_CALLCHARMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1303 HOTSPOT_JNI_CALLCHARMETHODA_RETURN(_ret_ref))
1304 DEFINE_CALLMETHODA(jshort, Short, T_SHORT
1305 , HOTSPOT_JNI_CALLSHORTMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1306 HOTSPOT_JNI_CALLSHORTMETHODA_RETURN(_ret_ref))
1307
1308 DEFINE_CALLMETHODA(jobject, Object, T_OBJECT
1309 , HOTSPOT_JNI_CALLOBJECTMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1310 HOTSPOT_JNI_CALLOBJECTMETHODA_RETURN(_ret_ref))
1311 DEFINE_CALLMETHODA(jint, Int, T_INT,
1312 HOTSPOT_JNI_CALLINTMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1313 HOTSPOT_JNI_CALLINTMETHODA_RETURN(_ret_ref))
1314 DEFINE_CALLMETHODA(jlong, Long, T_LONG
1315 , HOTSPOT_JNI_CALLLONGMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1316 HOTSPOT_JNI_CALLLONGMETHODA_RETURN(_ret_ref))
1317 // Float and double probes don't return value because dtrace doesn't currently support it
1318 DEFINE_CALLMETHODA(jfloat, Float, T_FLOAT
1319 , HOTSPOT_JNI_CALLFLOATMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1320 HOTSPOT_JNI_CALLFLOATMETHODA_RETURN())
1321 DEFINE_CALLMETHODA(jdouble, Double, T_DOUBLE
1322 , HOTSPOT_JNI_CALLDOUBLEMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1323 HOTSPOT_JNI_CALLDOUBLEMETHODA_RETURN())
1324
1325 DT_VOID_RETURN_MARK_DECL(CallVoidMethod, HOTSPOT_JNI_CALLVOIDMETHOD_RETURN());
1326 DT_VOID_RETURN_MARK_DECL(CallVoidMethodV, HOTSPOT_JNI_CALLVOIDMETHODV_RETURN());
1327 DT_VOID_RETURN_MARK_DECL(CallVoidMethodA, HOTSPOT_JNI_CALLVOIDMETHODA_RETURN());
1328
1329
1330 JNI_ENTRY(void, jni_CallVoidMethod(JNIEnv *env, jobject obj, jmethodID methodID, ...))
1331 HOTSPOT_JNI_CALLVOIDMETHOD_ENTRY(env, obj, (uintptr_t) methodID);
1332 DT_VOID_RETURN_MARK(CallVoidMethod);
1333
1334 va_list args;
1335 va_start(args, methodID);
1336 JavaValue jvalue(T_VOID);
1337 JNI_ArgumentPusherVaArg ap(methodID, args);
1338 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK);
1339 va_end(args);
1340 JNI_END
1341
1342
1343 JNI_ENTRY(void, jni_CallVoidMethodV(JNIEnv *env, jobject obj, jmethodID methodID, va_list args))
1344 HOTSPOT_JNI_CALLVOIDMETHODV_ENTRY(env, obj, (uintptr_t) methodID);
1345 DT_VOID_RETURN_MARK(CallVoidMethodV);
1346
1347 JavaValue jvalue(T_VOID);
1348 JNI_ArgumentPusherVaArg ap(methodID, args);
1349 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK);
1350 JNI_END
1351
1352
1353 JNI_ENTRY(void, jni_CallVoidMethodA(JNIEnv *env, jobject obj, jmethodID methodID, const jvalue *args))
1354 HOTSPOT_JNI_CALLVOIDMETHODA_ENTRY(env, obj, (uintptr_t) methodID);
1355 DT_VOID_RETURN_MARK(CallVoidMethodA);
1356
1357 JavaValue jvalue(T_VOID);
1358 JNI_ArgumentPusherArray ap(methodID, args);
1359 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK);
1360 JNI_END
1361
1362
1363
1364 #define DEFINE_CALLNONVIRTUALMETHOD(ResultType, Result, Tag \
1365 , EntryProbe, ReturnProbe) \
1366 \
1367 DT_RETURN_MARK_DECL_FOR(Result, CallNonvirtual##Result##Method, ResultType \
1368 , ReturnProbe);\
1369 \
1370 JNI_ENTRY(ResultType, \
1371 jni_CallNonvirtual##Result##Method(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, ...)) \
1372 \
1373 EntryProbe;\
1374 ResultType ret;\
1375 DT_RETURN_MARK_FOR(Result, CallNonvirtual##Result##Method, ResultType, \
1376 (const ResultType&)ret);\
1377 \
1378 va_list args; \
1379 va_start(args, methodID); \
1380 JavaValue jvalue(Tag); \
1381 JNI_ArgumentPusherVaArg ap(methodID, args); \
1382 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_(ResultType{})); \
1383 va_end(args); \
1384 ret = jvalue.get_##ResultType(); \
1385 return ret;\
1386 JNI_END
1387
1388 // the runtime type of subword integral basic types is integer
1389 DEFINE_CALLNONVIRTUALMETHOD(jboolean, Boolean, T_BOOLEAN
1390 , HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1391 HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHOD_RETURN(_ret_ref))
1392 DEFINE_CALLNONVIRTUALMETHOD(jbyte, Byte, T_BYTE
1393 , HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1394 HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHOD_RETURN(_ret_ref))
1395 DEFINE_CALLNONVIRTUALMETHOD(jchar, Char, T_CHAR
1396 , HOTSPOT_JNI_CALLNONVIRTUALCHARMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1397 HOTSPOT_JNI_CALLNONVIRTUALCHARMETHOD_RETURN(_ret_ref))
1398 DEFINE_CALLNONVIRTUALMETHOD(jshort, Short, T_SHORT
1399 , HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1400 HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHOD_RETURN(_ret_ref))
1401
1402 DEFINE_CALLNONVIRTUALMETHOD(jobject, Object, T_OBJECT
1403 , HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1404 HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHOD_RETURN(_ret_ref))
1405 DEFINE_CALLNONVIRTUALMETHOD(jint, Int, T_INT
1406 , HOTSPOT_JNI_CALLNONVIRTUALINTMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1407 HOTSPOT_JNI_CALLNONVIRTUALINTMETHOD_RETURN(_ret_ref))
1408 DEFINE_CALLNONVIRTUALMETHOD(jlong, Long, T_LONG
1409 , HOTSPOT_JNI_CALLNONVIRTUALLONGMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1410 // Float and double probes don't return value because dtrace doesn't currently support it
1411 HOTSPOT_JNI_CALLNONVIRTUALLONGMETHOD_RETURN(_ret_ref))
1412 DEFINE_CALLNONVIRTUALMETHOD(jfloat, Float, T_FLOAT
1413 , HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1414 HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHOD_RETURN())
1415 DEFINE_CALLNONVIRTUALMETHOD(jdouble, Double, T_DOUBLE
1416 , HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1417 HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHOD_RETURN())
1418
1419 #define DEFINE_CALLNONVIRTUALMETHODV(ResultType, Result, Tag \
1420 , EntryProbe, ReturnProbe) \
1421 \
1422 DT_RETURN_MARK_DECL_FOR(Result, CallNonvirtual##Result##MethodV, ResultType \
1423 , ReturnProbe);\
1424 \
1425 JNI_ENTRY(ResultType, \
1426 jni_CallNonvirtual##Result##MethodV(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, va_list args)) \
1427 \
1428 EntryProbe;\
1429 ResultType ret;\
1430 DT_RETURN_MARK_FOR(Result, CallNonvirtual##Result##MethodV, ResultType, \
1431 (const ResultType&)ret);\
1432 \
1433 JavaValue jvalue(Tag); \
1434 JNI_ArgumentPusherVaArg ap(methodID, args); \
1435 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_(ResultType{})); \
1436 ret = jvalue.get_##ResultType(); \
1437 return ret;\
1438 JNI_END
1439
1440 // the runtime type of subword integral basic types is integer
1441 DEFINE_CALLNONVIRTUALMETHODV(jboolean, Boolean, T_BOOLEAN
1442 , HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1443 HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHODV_RETURN(_ret_ref))
1444 DEFINE_CALLNONVIRTUALMETHODV(jbyte, Byte, T_BYTE
1445 , HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1446 HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHODV_RETURN(_ret_ref))
1447 DEFINE_CALLNONVIRTUALMETHODV(jchar, Char, T_CHAR
1448 , HOTSPOT_JNI_CALLNONVIRTUALCHARMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1449 HOTSPOT_JNI_CALLNONVIRTUALCHARMETHODV_RETURN(_ret_ref))
1450 DEFINE_CALLNONVIRTUALMETHODV(jshort, Short, T_SHORT
1451 , HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1452 HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHODV_RETURN(_ret_ref))
1453
1454 DEFINE_CALLNONVIRTUALMETHODV(jobject, Object, T_OBJECT
1455 , HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1456 HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHODV_RETURN(_ret_ref))
1457 DEFINE_CALLNONVIRTUALMETHODV(jint, Int, T_INT
1458 , HOTSPOT_JNI_CALLNONVIRTUALINTMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1459 HOTSPOT_JNI_CALLNONVIRTUALINTMETHODV_RETURN(_ret_ref))
1460 DEFINE_CALLNONVIRTUALMETHODV(jlong, Long, T_LONG
1461 , HOTSPOT_JNI_CALLNONVIRTUALLONGMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1462 // Float and double probes don't return value because dtrace doesn't currently support it
1463 HOTSPOT_JNI_CALLNONVIRTUALLONGMETHODV_RETURN(_ret_ref))
1464 DEFINE_CALLNONVIRTUALMETHODV(jfloat, Float, T_FLOAT
1465 , HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1466 HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHODV_RETURN())
1467 DEFINE_CALLNONVIRTUALMETHODV(jdouble, Double, T_DOUBLE
1468 , HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1469 HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHODV_RETURN())
1470
1471 #define DEFINE_CALLNONVIRTUALMETHODA(ResultType, Result, Tag \
1472 , EntryProbe, ReturnProbe) \
1473 \
1474 DT_RETURN_MARK_DECL_FOR(Result, CallNonvirtual##Result##MethodA, ResultType \
1475 , ReturnProbe);\
1476 \
1477 JNI_ENTRY(ResultType, \
1478 jni_CallNonvirtual##Result##MethodA(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, const jvalue *args)) \
1479 \
1480 EntryProbe;\
1481 ResultType ret;\
1482 DT_RETURN_MARK_FOR(Result, CallNonvirtual##Result##MethodA, ResultType, \
1483 (const ResultType&)ret);\
1484 \
1485 JavaValue jvalue(Tag); \
1486 JNI_ArgumentPusherArray ap(methodID, args); \
1487 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_(ResultType{})); \
1488 ret = jvalue.get_##ResultType(); \
1489 return ret;\
1490 JNI_END
1491
1492 // the runtime type of subword integral basic types is integer
1493 DEFINE_CALLNONVIRTUALMETHODA(jboolean, Boolean, T_BOOLEAN
1494 , HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1495 HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHODA_RETURN(_ret_ref))
1496 DEFINE_CALLNONVIRTUALMETHODA(jbyte, Byte, T_BYTE
1497 , HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1498 HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHODA_RETURN(_ret_ref))
1499 DEFINE_CALLNONVIRTUALMETHODA(jchar, Char, T_CHAR
1500 , HOTSPOT_JNI_CALLNONVIRTUALCHARMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1501 HOTSPOT_JNI_CALLNONVIRTUALCHARMETHODA_RETURN(_ret_ref))
1502 DEFINE_CALLNONVIRTUALMETHODA(jshort, Short, T_SHORT
1503 , HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1504 HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHODA_RETURN(_ret_ref))
1505
1506 DEFINE_CALLNONVIRTUALMETHODA(jobject, Object, T_OBJECT
1507 , HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1508 HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHODA_RETURN(_ret_ref))
1509 DEFINE_CALLNONVIRTUALMETHODA(jint, Int, T_INT
1510 , HOTSPOT_JNI_CALLNONVIRTUALINTMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1511 HOTSPOT_JNI_CALLNONVIRTUALINTMETHODA_RETURN(_ret_ref))
1512 DEFINE_CALLNONVIRTUALMETHODA(jlong, Long, T_LONG
1513 , HOTSPOT_JNI_CALLNONVIRTUALLONGMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1514 // Float and double probes don't return value because dtrace doesn't currently support it
1515 HOTSPOT_JNI_CALLNONVIRTUALLONGMETHODA_RETURN(_ret_ref))
1516 DEFINE_CALLNONVIRTUALMETHODA(jfloat, Float, T_FLOAT
1517 , HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1518 HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHODA_RETURN())
1519 DEFINE_CALLNONVIRTUALMETHODA(jdouble, Double, T_DOUBLE
1520 , HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1521 HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHODA_RETURN())
1522
1523 DT_VOID_RETURN_MARK_DECL(CallNonvirtualVoidMethod
1524 , HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHOD_RETURN());
1525 DT_VOID_RETURN_MARK_DECL(CallNonvirtualVoidMethodV
1526 , HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHODV_RETURN());
1527 DT_VOID_RETURN_MARK_DECL(CallNonvirtualVoidMethodA
1528 , HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHODA_RETURN());
1529
1530 JNI_ENTRY(void, jni_CallNonvirtualVoidMethod(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, ...))
1531 HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHOD_ENTRY(env, obj, cls, (uintptr_t) methodID);
1532 DT_VOID_RETURN_MARK(CallNonvirtualVoidMethod);
1533
1534 va_list args;
1535 va_start(args, methodID);
1536 JavaValue jvalue(T_VOID);
1537 JNI_ArgumentPusherVaArg ap(methodID, args);
1538 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK);
1539 va_end(args);
1540 JNI_END
1541
1542
1543 JNI_ENTRY(void, jni_CallNonvirtualVoidMethodV(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, va_list args))
1544 HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHODV_ENTRY(
1545 env, obj, cls, (uintptr_t) methodID);
1546 DT_VOID_RETURN_MARK(CallNonvirtualVoidMethodV);
1547
1548 JavaValue jvalue(T_VOID);
1549 JNI_ArgumentPusherVaArg ap(methodID, args);
1550 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK);
1551 JNI_END
1552
1553
1554 JNI_ENTRY(void, jni_CallNonvirtualVoidMethodA(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, const jvalue *args))
1555 HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHODA_ENTRY(
1556 env, obj, cls, (uintptr_t) methodID);
1557 DT_VOID_RETURN_MARK(CallNonvirtualVoidMethodA);
1558 JavaValue jvalue(T_VOID);
1559 JNI_ArgumentPusherArray ap(methodID, args);
1560 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK);
1561 JNI_END
1562
1563
1564
1565 #define DEFINE_CALLSTATICMETHOD(ResultType, Result, Tag \
1566 , EntryProbe, ResultProbe) \
1567 \
1568 DT_RETURN_MARK_DECL_FOR(Result, CallStatic##Result##Method, ResultType \
1569 , ResultProbe); \
1570 \
1571 JNI_ENTRY(ResultType, \
1572 jni_CallStatic##Result##Method(JNIEnv *env, jclass cls, jmethodID methodID, ...)) \
1573 \
1574 EntryProbe; \
1575 ResultType ret{}; \
1576 DT_RETURN_MARK_FOR(Result, CallStatic##Result##Method, ResultType, \
1577 (const ResultType&)ret);\
1578 \
1579 va_list args; \
1580 va_start(args, methodID); \
1581 JavaValue jvalue(Tag); \
1582 JNI_ArgumentPusherVaArg ap(methodID, args); \
1583 jni_invoke_static(env, &jvalue, nullptr, JNI_STATIC, methodID, &ap, CHECK_(ResultType{})); \
1584 va_end(args); \
1585 ret = jvalue.get_##ResultType(); \
1586 return ret;\
1587 JNI_END
1588
1589 // the runtime type of subword integral basic types is integer
1590 DEFINE_CALLSTATICMETHOD(jboolean, Boolean, T_BOOLEAN
1591 , HOTSPOT_JNI_CALLSTATICBOOLEANMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1592 HOTSPOT_JNI_CALLSTATICBOOLEANMETHOD_RETURN(_ret_ref));
1593 DEFINE_CALLSTATICMETHOD(jbyte, Byte, T_BYTE
1594 , HOTSPOT_JNI_CALLSTATICBYTEMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1595 HOTSPOT_JNI_CALLSTATICBYTEMETHOD_RETURN(_ret_ref));
1596 DEFINE_CALLSTATICMETHOD(jchar, Char, T_CHAR
1597 , HOTSPOT_JNI_CALLSTATICCHARMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1598 HOTSPOT_JNI_CALLSTATICCHARMETHOD_RETURN(_ret_ref));
1599 DEFINE_CALLSTATICMETHOD(jshort, Short, T_SHORT
1600 , HOTSPOT_JNI_CALLSTATICSHORTMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1601 HOTSPOT_JNI_CALLSTATICSHORTMETHOD_RETURN(_ret_ref));
1602
1603 DEFINE_CALLSTATICMETHOD(jobject, Object, T_OBJECT
1604 , HOTSPOT_JNI_CALLSTATICOBJECTMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1605 HOTSPOT_JNI_CALLSTATICOBJECTMETHOD_RETURN(_ret_ref));
1606 DEFINE_CALLSTATICMETHOD(jint, Int, T_INT
1607 , HOTSPOT_JNI_CALLSTATICINTMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1608 HOTSPOT_JNI_CALLSTATICINTMETHOD_RETURN(_ret_ref));
1609 DEFINE_CALLSTATICMETHOD(jlong, Long, T_LONG
1610 , HOTSPOT_JNI_CALLSTATICLONGMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1611 HOTSPOT_JNI_CALLSTATICLONGMETHOD_RETURN(_ret_ref));
1612 // Float and double probes don't return value because dtrace doesn't currently support it
1613 DEFINE_CALLSTATICMETHOD(jfloat, Float, T_FLOAT
1614 , HOTSPOT_JNI_CALLSTATICFLOATMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1615 HOTSPOT_JNI_CALLSTATICFLOATMETHOD_RETURN());
1616 DEFINE_CALLSTATICMETHOD(jdouble, Double, T_DOUBLE
1617 , HOTSPOT_JNI_CALLSTATICDOUBLEMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1618 HOTSPOT_JNI_CALLSTATICDOUBLEMETHOD_RETURN());
1619
1620 #define DEFINE_CALLSTATICMETHODV(ResultType, Result, Tag \
1621 , EntryProbe, ResultProbe) \
1622 \
1623 DT_RETURN_MARK_DECL_FOR(Result, CallStatic##Result##MethodV, ResultType \
1624 , ResultProbe); \
1625 \
1626 JNI_ENTRY(ResultType, \
1627 jni_CallStatic##Result##MethodV(JNIEnv *env, jclass cls, jmethodID methodID, va_list args)) \
1628 \
1629 EntryProbe; \
1630 ResultType ret{}; \
1631 DT_RETURN_MARK_FOR(Result, CallStatic##Result##MethodV, ResultType, \
1632 (const ResultType&)ret);\
1633 \
1634 JavaValue jvalue(Tag); \
1635 JNI_ArgumentPusherVaArg ap(methodID, args); \
1636 /* Make sure class is initialized before trying to invoke its method */ \
1637 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); \
1638 k->initialize(CHECK_(ResultType{})); \
1639 jni_invoke_static(env, &jvalue, nullptr, JNI_STATIC, methodID, &ap, CHECK_(ResultType{})); \
1640 va_end(args); \
1641 ret = jvalue.get_##ResultType(); \
1642 return ret;\
1643 JNI_END
1644
1645 // the runtime type of subword integral basic types is integer
1646 DEFINE_CALLSTATICMETHODV(jboolean, Boolean, T_BOOLEAN
1647 , HOTSPOT_JNI_CALLSTATICBOOLEANMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1648 HOTSPOT_JNI_CALLSTATICBOOLEANMETHODV_RETURN(_ret_ref));
1649 DEFINE_CALLSTATICMETHODV(jbyte, Byte, T_BYTE
1650 , HOTSPOT_JNI_CALLSTATICBYTEMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1651 HOTSPOT_JNI_CALLSTATICBYTEMETHODV_RETURN(_ret_ref));
1652 DEFINE_CALLSTATICMETHODV(jchar, Char, T_CHAR
1653 , HOTSPOT_JNI_CALLSTATICCHARMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1654 HOTSPOT_JNI_CALLSTATICCHARMETHODV_RETURN(_ret_ref));
1655 DEFINE_CALLSTATICMETHODV(jshort, Short, T_SHORT
1656 , HOTSPOT_JNI_CALLSTATICSHORTMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1657 HOTSPOT_JNI_CALLSTATICSHORTMETHODV_RETURN(_ret_ref));
1658
1659 DEFINE_CALLSTATICMETHODV(jobject, Object, T_OBJECT
1660 , HOTSPOT_JNI_CALLSTATICOBJECTMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1661 HOTSPOT_JNI_CALLSTATICOBJECTMETHODV_RETURN(_ret_ref));
1662 DEFINE_CALLSTATICMETHODV(jint, Int, T_INT
1663 , HOTSPOT_JNI_CALLSTATICINTMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1664 HOTSPOT_JNI_CALLSTATICINTMETHODV_RETURN(_ret_ref));
1665 DEFINE_CALLSTATICMETHODV(jlong, Long, T_LONG
1666 , HOTSPOT_JNI_CALLSTATICLONGMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1667 HOTSPOT_JNI_CALLSTATICLONGMETHODV_RETURN(_ret_ref));
1668 // Float and double probes don't return value because dtrace doesn't currently support it
1669 DEFINE_CALLSTATICMETHODV(jfloat, Float, T_FLOAT
1670 , HOTSPOT_JNI_CALLSTATICFLOATMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1671 HOTSPOT_JNI_CALLSTATICFLOATMETHODV_RETURN());
1672 DEFINE_CALLSTATICMETHODV(jdouble, Double, T_DOUBLE
1673 , HOTSPOT_JNI_CALLSTATICDOUBLEMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1674 HOTSPOT_JNI_CALLSTATICDOUBLEMETHODV_RETURN());
1675
1676 #define DEFINE_CALLSTATICMETHODA(ResultType, Result, Tag \
1677 , EntryProbe, ResultProbe) \
1678 \
1679 DT_RETURN_MARK_DECL_FOR(Result, CallStatic##Result##MethodA, ResultType \
1680 , ResultProbe); \
1681 \
1682 JNI_ENTRY(ResultType, \
1683 jni_CallStatic##Result##MethodA(JNIEnv *env, jclass cls, jmethodID methodID, const jvalue *args)) \
1684 \
1685 EntryProbe; \
1686 ResultType ret{}; \
1687 DT_RETURN_MARK_FOR(Result, CallStatic##Result##MethodA, ResultType, \
1688 (const ResultType&)ret);\
1689 \
1690 JavaValue jvalue(Tag); \
1691 JNI_ArgumentPusherArray ap(methodID, args); \
1692 jni_invoke_static(env, &jvalue, nullptr, JNI_STATIC, methodID, &ap, CHECK_(ResultType{})); \
1693 ret = jvalue.get_##ResultType(); \
1694 return ret;\
1695 JNI_END
1696
1697 // the runtime type of subword integral basic types is integer
1698 DEFINE_CALLSTATICMETHODA(jboolean, Boolean, T_BOOLEAN
1699 , HOTSPOT_JNI_CALLSTATICBOOLEANMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1700 HOTSPOT_JNI_CALLSTATICBOOLEANMETHODA_RETURN(_ret_ref));
1701 DEFINE_CALLSTATICMETHODA(jbyte, Byte, T_BYTE
1702 , HOTSPOT_JNI_CALLSTATICBYTEMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1703 HOTSPOT_JNI_CALLSTATICBYTEMETHODA_RETURN(_ret_ref));
1704 DEFINE_CALLSTATICMETHODA(jchar, Char, T_CHAR
1705 , HOTSPOT_JNI_CALLSTATICCHARMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1706 HOTSPOT_JNI_CALLSTATICCHARMETHODA_RETURN(_ret_ref));
1707 DEFINE_CALLSTATICMETHODA(jshort, Short, T_SHORT
1708 , HOTSPOT_JNI_CALLSTATICSHORTMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1709 HOTSPOT_JNI_CALLSTATICSHORTMETHODA_RETURN(_ret_ref));
1710
1711 DEFINE_CALLSTATICMETHODA(jobject, Object, T_OBJECT
1712 , HOTSPOT_JNI_CALLSTATICOBJECTMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1713 HOTSPOT_JNI_CALLSTATICOBJECTMETHODA_RETURN(_ret_ref));
1714 DEFINE_CALLSTATICMETHODA(jint, Int, T_INT
1715 , HOTSPOT_JNI_CALLSTATICINTMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1716 HOTSPOT_JNI_CALLSTATICINTMETHODA_RETURN(_ret_ref));
1717 DEFINE_CALLSTATICMETHODA(jlong, Long, T_LONG
1718 , HOTSPOT_JNI_CALLSTATICLONGMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1719 HOTSPOT_JNI_CALLSTATICLONGMETHODA_RETURN(_ret_ref));
1720 // Float and double probes don't return value because dtrace doesn't currently support it
1721 DEFINE_CALLSTATICMETHODA(jfloat, Float, T_FLOAT
1722 , HOTSPOT_JNI_CALLSTATICFLOATMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1723 HOTSPOT_JNI_CALLSTATICFLOATMETHODA_RETURN());
1724 DEFINE_CALLSTATICMETHODA(jdouble, Double, T_DOUBLE
1725 , HOTSPOT_JNI_CALLSTATICDOUBLEMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1726 HOTSPOT_JNI_CALLSTATICDOUBLEMETHODA_RETURN());
1727
1728 DT_VOID_RETURN_MARK_DECL(CallStaticVoidMethod
1729 , HOTSPOT_JNI_CALLSTATICVOIDMETHOD_RETURN());
1730 DT_VOID_RETURN_MARK_DECL(CallStaticVoidMethodV
1731 , HOTSPOT_JNI_CALLSTATICVOIDMETHODV_RETURN());
1732 DT_VOID_RETURN_MARK_DECL(CallStaticVoidMethodA
1733 , HOTSPOT_JNI_CALLSTATICVOIDMETHODA_RETURN());
1734
1735 JNI_ENTRY(void, jni_CallStaticVoidMethod(JNIEnv *env, jclass cls, jmethodID methodID, ...))
1736 HOTSPOT_JNI_CALLSTATICVOIDMETHOD_ENTRY(env, cls, (uintptr_t) methodID);
1737 DT_VOID_RETURN_MARK(CallStaticVoidMethod);
1738
1739 va_list args;
1740 va_start(args, methodID);
1741 JavaValue jvalue(T_VOID);
1742 JNI_ArgumentPusherVaArg ap(methodID, args);
1743 jni_invoke_static(env, &jvalue, nullptr, JNI_STATIC, methodID, &ap, CHECK);
1744 va_end(args);
1745 JNI_END
1746
1747
1748 JNI_ENTRY(void, jni_CallStaticVoidMethodV(JNIEnv *env, jclass cls, jmethodID methodID, va_list args))
1749 HOTSPOT_JNI_CALLSTATICVOIDMETHODV_ENTRY(env, cls, (uintptr_t) methodID);
1750 DT_VOID_RETURN_MARK(CallStaticVoidMethodV);
1751
1752 JavaValue jvalue(T_VOID);
1753 JNI_ArgumentPusherVaArg ap(methodID, args);
1754 jni_invoke_static(env, &jvalue, nullptr, JNI_STATIC, methodID, &ap, CHECK);
1755 JNI_END
1756
1757
1758 JNI_ENTRY(void, jni_CallStaticVoidMethodA(JNIEnv *env, jclass cls, jmethodID methodID, const jvalue *args))
1759 HOTSPOT_JNI_CALLSTATICVOIDMETHODA_ENTRY(env, cls, (uintptr_t) methodID);
1760 DT_VOID_RETURN_MARK(CallStaticVoidMethodA);
1761
1762 JavaValue jvalue(T_VOID);
1763 JNI_ArgumentPusherArray ap(methodID, args);
1764 jni_invoke_static(env, &jvalue, nullptr, JNI_STATIC, methodID, &ap, CHECK);
1765 JNI_END
1766
1767
1768 //
1769 // Accessing Fields
1770 //
1771
1772
1773 DT_RETURN_MARK_DECL(GetFieldID, jfieldID
1774 , HOTSPOT_JNI_GETFIELDID_RETURN((uintptr_t)_ret_ref));
1775
1776 JNI_ENTRY(jfieldID, jni_GetFieldID(JNIEnv *env, jclass clazz,
1777 const char *name, const char *sig))
1778 HOTSPOT_JNI_GETFIELDID_ENTRY(env, clazz, (char *) name, (char *) sig);
1779 jfieldID ret = nullptr;
1780 DT_RETURN_MARK(GetFieldID, jfieldID, (const jfieldID&)ret);
1781
1782 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz));
1783
1784 // The class should have been loaded (we have an instance of the class
1785 // passed in) so the field and signature should already be in the symbol
1786 // table. If they're not there, the field doesn't exist.
1787 TempNewSymbol fieldname = SymbolTable::probe(name, (int)strlen(name));
1788 TempNewSymbol signame = SymbolTable::probe(sig, (int)strlen(sig));
1789 if (fieldname == nullptr || signame == nullptr) {
1790 ResourceMark rm;
1791 THROW_MSG_NULL(vmSymbols::java_lang_NoSuchFieldError(), err_msg("%s.%s %s", k->external_name(), name, sig));
1792 }
1793
1794 // Make sure class is initialized before handing id's out to fields
1795 k->initialize(CHECK_NULL);
1796
1797 fieldDescriptor fd;
1798 if (!k->is_instance_klass() ||
1799 !InstanceKlass::cast(k)->find_field(fieldname, signame, false, &fd)) {
1800 ResourceMark rm;
1801 THROW_MSG_NULL(vmSymbols::java_lang_NoSuchFieldError(), err_msg("%s.%s %s", k->external_name(), name, sig));
1802 }
1803
1804 // A jfieldID for a non-static field is simply the offset of the field within the instanceOop
1805 // It may also have hash bits for k, if VerifyJNIFields is turned on.
1806 ret = jfieldIDWorkaround::to_instance_jfieldID(k, fd.offset(), fd.is_flat());
1807 return ret;
1808 JNI_END
1809
1810
1811 JNI_ENTRY(jobject, jni_GetObjectField(JNIEnv *env, jobject obj, jfieldID fieldID))
1812 HOTSPOT_JNI_GETOBJECTFIELD_ENTRY(env, obj, (uintptr_t) fieldID);
1813 oop o = JNIHandles::resolve_non_null(obj);
1814 Klass* k = o->klass();
1815 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID);
1816 oop res = nullptr;
1817 // Keep JVMTI addition small and only check enabled flag here.
1818 // jni_GetField_probe() assumes that is okay to create handles.
1819 if (JvmtiExport::should_post_field_access()) {
1820 o = JvmtiExport::jni_GetField_probe(thread, obj, o, k, fieldID, false);
1821 }
1822 if (!jfieldIDWorkaround::is_flat_jfieldID(fieldID)) {
1823 res = HeapAccess<ON_UNKNOWN_OOP_REF>::oop_load_at(o, offset);
1824 } else {
1825 assert(k->is_instance_klass(), "Only instance can have flat fields");
1826 InstanceKlass* ik = InstanceKlass::cast(k);
1827 fieldDescriptor fd;
1828 bool found = ik->find_field_from_offset(offset, false, &fd); // performance bottleneck
1829 assert(found, "Field not found");
1830 InstanceKlass* holder = fd.field_holder();
1831 assert(holder->field_is_flat(fd.index()), "Must be");
1832 InlineLayoutInfo* li = holder->inline_layout_info_adr(fd.index());
1833 InlineKlass* field_vklass = li->klass();
1834 res = field_vklass->read_payload_from_addr(o, ik->field_offset(fd.index()), li->kind(), CHECK_NULL);
1835 }
1836 jobject ret = JNIHandles::make_local(THREAD, res);
1837 HOTSPOT_JNI_GETOBJECTFIELD_RETURN(ret);
1838 return ret;
1839 JNI_END
1840
1841 #define DEFINE_GETFIELD(Return,Fieldname,Result \
1842 , EntryProbe, ReturnProbe) \
1843 \
1844 DT_RETURN_MARK_DECL_FOR(Result, Get##Result##Field, Return \
1845 , ReturnProbe); \
1846 \
1847 JNI_ENTRY_NO_PRESERVE(Return, jni_Get##Result##Field(JNIEnv *env, jobject obj, jfieldID fieldID)) \
1848 \
1849 EntryProbe; \
1850 Return ret = 0;\
1851 DT_RETURN_MARK_FOR(Result, Get##Result##Field, Return, (const Return&)ret);\
1852 \
1853 oop o = JNIHandles::resolve_non_null(obj); \
1854 Klass* k = o->klass(); \
1855 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID); \
1856 /* Keep JVMTI addition small and only check enabled flag here. */ \
1857 if (JvmtiExport::should_post_field_access()) { \
1858 o = JvmtiExport::jni_GetField_probe(thread, obj, o, k, fieldID, false); \
1859 } \
1860 ret = o->Fieldname##_field(offset); \
1861 return ret; \
1862 JNI_END
1863
1864 DEFINE_GETFIELD(jboolean, bool, Boolean
1865 , HOTSPOT_JNI_GETBOOLEANFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
1866 HOTSPOT_JNI_GETBOOLEANFIELD_RETURN(_ret_ref))
1867 DEFINE_GETFIELD(jbyte, byte, Byte
1868 , HOTSPOT_JNI_GETBYTEFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
1869 HOTSPOT_JNI_GETBYTEFIELD_RETURN(_ret_ref))
1870 DEFINE_GETFIELD(jchar, char, Char
1871 , HOTSPOT_JNI_GETCHARFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
1872 HOTSPOT_JNI_GETCHARFIELD_RETURN(_ret_ref))
1873 DEFINE_GETFIELD(jshort, short, Short
1874 , HOTSPOT_JNI_GETSHORTFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
1875 HOTSPOT_JNI_GETSHORTFIELD_RETURN(_ret_ref))
1876 DEFINE_GETFIELD(jint, int, Int
1877 , HOTSPOT_JNI_GETINTFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
1878 HOTSPOT_JNI_GETINTFIELD_RETURN(_ret_ref))
1879 DEFINE_GETFIELD(jlong, long, Long
1880 , HOTSPOT_JNI_GETLONGFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
1881 HOTSPOT_JNI_GETLONGFIELD_RETURN(_ret_ref))
1882 // Float and double probes don't return value because dtrace doesn't currently support it
1883 DEFINE_GETFIELD(jfloat, float, Float
1884 , HOTSPOT_JNI_GETFLOATFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
1885 HOTSPOT_JNI_GETFLOATFIELD_RETURN())
1886 DEFINE_GETFIELD(jdouble, double, Double
1887 , HOTSPOT_JNI_GETDOUBLEFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
1888 HOTSPOT_JNI_GETDOUBLEFIELD_RETURN())
1889
1890 address jni_GetBooleanField_addr() {
1891 return (address)jni_GetBooleanField;
1892 }
1893 address jni_GetByteField_addr() {
1894 return (address)jni_GetByteField;
1895 }
1896 address jni_GetCharField_addr() {
1897 return (address)jni_GetCharField;
1898 }
1899 address jni_GetShortField_addr() {
1900 return (address)jni_GetShortField;
1901 }
1902 address jni_GetIntField_addr() {
1903 return (address)jni_GetIntField;
1904 }
1905 address jni_GetLongField_addr() {
1906 return (address)jni_GetLongField;
1907 }
1908 address jni_GetFloatField_addr() {
1909 return (address)jni_GetFloatField;
1910 }
1911 address jni_GetDoubleField_addr() {
1912 return (address)jni_GetDoubleField;
1913 }
1914
1915 static void log_debug_if_final_static_field(JavaThread* current, const char* func_name, InstanceKlass* ik, int offset) {
1916 if (log_is_enabled(Debug, jni)) {
1917 fieldDescriptor fd;
1918 bool found = ik->find_field_from_offset(offset, true, &fd);
1919 assert(found, "bad field offset");
1920 assert(fd.is_static(), "static/instance mismatch");
1921 if (fd.is_final() && !fd.is_mutable_static_final()) {
1922 ResourceMark rm(current);
1923 log_debug(jni)("%s mutated final static field %s.%s", func_name, ik->external_name(), fd.name()->as_C_string());
1924 }
1925 }
1926 }
1927
1928 static void log_debug_if_final_instance_field(JavaThread* current, const char* func_name, InstanceKlass* ik, int offset) {
1929 if (log_is_enabled(Debug, jni)) {
1930 fieldDescriptor fd;
1931 bool found = ik->find_field_from_offset(offset, false, &fd);
1932 assert(found, "bad field offset");
1933 assert(!fd.is_static(), "static/instance mismatch");
1934 if (fd.is_final()) {
1935 ResourceMark rm(current);
1936 log_debug(jni)("%s mutated final instance field %s.%s", func_name, ik->external_name(), fd.name()->as_C_string());
1937 }
1938 }
1939 }
1940
1941 JNI_ENTRY_NO_PRESERVE(void, jni_SetObjectField(JNIEnv *env, jobject obj, jfieldID fieldID, jobject value))
1942 HOTSPOT_JNI_SETOBJECTFIELD_ENTRY(env, obj, (uintptr_t) fieldID, value);
1943 oop o = JNIHandles::resolve_non_null(obj);
1944 Klass* k = o->klass();
1945 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID);
1946 // Keep JVMTI addition small and only check enabled flag here.
1947 if (JvmtiExport::should_post_field_modification()) {
1948 jvalue field_value;
1949 field_value.l = value;
1950 o = JvmtiExport::jni_SetField_probe(thread, obj, o, k, fieldID, false, JVM_SIGNATURE_CLASS, (jvalue *)&field_value);
1951 }
1952 if (!jfieldIDWorkaround::is_flat_jfieldID(fieldID)) {
1953 oop v = JNIHandles::resolve(value);
1954 if (v == nullptr) {
1955 InstanceKlass *ik = InstanceKlass::cast(k);
1956 fieldDescriptor fd;
1957 ik->find_field_from_offset(offset, false, &fd);
1958 if (fd.is_null_free_inline_type()) {
1959 THROW_MSG(vmSymbols::java_lang_NullPointerException(), "Cannot store null in a null-restricted field");
1960 }
1961 }
1962 HeapAccess<ON_UNKNOWN_OOP_REF>::oop_store_at(o, offset, v);
1963 } else {
1964 assert(k->is_instance_klass(), "Only instances can have flat fields");
1965 InstanceKlass* ik = InstanceKlass::cast(k);
1966 fieldDescriptor fd;
1967 ik->find_field_from_offset(offset, false, &fd);
1968 InstanceKlass* holder = fd.field_holder();
1969 InlineLayoutInfo* li = holder->inline_layout_info_adr(fd.index());
1970 InlineKlass* vklass = li->klass();
1971 oop v = JNIHandles::resolve(value);
1972 vklass->write_value_to_addr(v, ((char*)(oopDesc*)o) + offset, li->kind(), true, CHECK);
1973 }
1974 log_debug_if_final_instance_field(thread, "SetObjectField", InstanceKlass::cast(k), offset);
1975 HOTSPOT_JNI_SETOBJECTFIELD_RETURN();
1976 JNI_END
1977
1978 // TODO: make this a template
1979
1980 #define DEFINE_SETFIELD(Argument,Fieldname,Result,SigType,unionType \
1981 , EntryProbe, ReturnProbe) \
1982 \
1983 JNI_ENTRY_NO_PRESERVE(void, jni_Set##Result##Field(JNIEnv *env, jobject obj, jfieldID fieldID, Argument value)) \
1984 \
1985 EntryProbe; \
1986 \
1987 oop o = JNIHandles::resolve_non_null(obj); \
1988 Klass* k = o->klass(); \
1989 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID); \
1990 /* Keep JVMTI addition small and only check enabled flag here. */ \
1991 if (JvmtiExport::should_post_field_modification()) { \
1992 jvalue field_value; \
1993 field_value.unionType = value; \
1994 o = JvmtiExport::jni_SetField_probe(thread, obj, o, k, fieldID, false, SigType, (jvalue *)&field_value); \
1995 } \
1996 o->Fieldname##_field_put(offset, value); \
1997 log_debug_if_final_instance_field(thread, "Set<Type>Field", InstanceKlass::cast(k), offset); \
1998 ReturnProbe; \
1999 JNI_END
2000
2001 DEFINE_SETFIELD(jboolean, bool, Boolean, JVM_SIGNATURE_BOOLEAN, z
2002 , HOTSPOT_JNI_SETBOOLEANFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value),
2003 HOTSPOT_JNI_SETBOOLEANFIELD_RETURN())
2004 DEFINE_SETFIELD(jbyte, byte, Byte, JVM_SIGNATURE_BYTE, b
2005 , HOTSPOT_JNI_SETBYTEFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value),
2006 HOTSPOT_JNI_SETBYTEFIELD_RETURN())
2007 DEFINE_SETFIELD(jchar, char, Char, JVM_SIGNATURE_CHAR, c
2008 , HOTSPOT_JNI_SETCHARFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value),
2009 HOTSPOT_JNI_SETCHARFIELD_RETURN())
2010 DEFINE_SETFIELD(jshort, short, Short, JVM_SIGNATURE_SHORT, s
2011 , HOTSPOT_JNI_SETSHORTFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value),
2012 HOTSPOT_JNI_SETSHORTFIELD_RETURN())
2013 DEFINE_SETFIELD(jint, int, Int, JVM_SIGNATURE_INT, i
2014 , HOTSPOT_JNI_SETINTFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value),
2015 HOTSPOT_JNI_SETINTFIELD_RETURN())
2016 DEFINE_SETFIELD(jlong, long, Long, JVM_SIGNATURE_LONG, j
2017 , HOTSPOT_JNI_SETLONGFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value),
2018 HOTSPOT_JNI_SETLONGFIELD_RETURN())
2019 // Float and double probes don't return value because dtrace doesn't currently support it
2020 DEFINE_SETFIELD(jfloat, float, Float, JVM_SIGNATURE_FLOAT, f
2021 , HOTSPOT_JNI_SETFLOATFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2022 HOTSPOT_JNI_SETFLOATFIELD_RETURN())
2023 DEFINE_SETFIELD(jdouble, double, Double, JVM_SIGNATURE_DOUBLE, d
2024 , HOTSPOT_JNI_SETDOUBLEFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2025 HOTSPOT_JNI_SETDOUBLEFIELD_RETURN())
2026
2027 DT_RETURN_MARK_DECL(ToReflectedField, jobject
2028 , HOTSPOT_JNI_TOREFLECTEDFIELD_RETURN(_ret_ref));
2029
2030 JNI_ENTRY(jobject, jni_ToReflectedField(JNIEnv *env, jclass cls, jfieldID fieldID, jboolean isStatic))
2031 HOTSPOT_JNI_TOREFLECTEDFIELD_ENTRY(env, cls, (uintptr_t) fieldID, isStatic);
2032 jobject ret = nullptr;
2033 DT_RETURN_MARK(ToReflectedField, jobject, (const jobject&)ret);
2034
2035 fieldDescriptor fd;
2036 bool found = false;
2037 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2038
2039 assert(jfieldIDWorkaround::is_static_jfieldID(fieldID) == (isStatic != 0), "invalid fieldID");
2040
2041 if (isStatic) {
2042 // Static field. The fieldID a JNIid specifying the field holder and the offset within the Klass*.
2043 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID);
2044 assert(id->is_static_field_id(), "invalid static field id");
2045 found = id->find_local_field(&fd);
2046 } else {
2047 // Non-static field. The fieldID is really the offset of the field within the instanceOop.
2048 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID);
2049 found = InstanceKlass::cast(k)->find_field_from_offset(offset, false, &fd);
2050 }
2051 assert(found, "bad fieldID passed into jni_ToReflectedField");
2052 oop reflected = Reflection::new_field(&fd, CHECK_NULL);
2053 ret = JNIHandles::make_local(THREAD, reflected);
2054 return ret;
2055 JNI_END
2056
2057
2058 //
2059 // Accessing Static Fields
2060 //
2061 DT_RETURN_MARK_DECL(GetStaticFieldID, jfieldID
2062 , HOTSPOT_JNI_GETSTATICFIELDID_RETURN((uintptr_t)_ret_ref));
2063
2064 JNI_ENTRY(jfieldID, jni_GetStaticFieldID(JNIEnv *env, jclass clazz,
2065 const char *name, const char *sig))
2066 HOTSPOT_JNI_GETSTATICFIELDID_ENTRY(env, clazz, (char *) name, (char *) sig);
2067 jfieldID ret = nullptr;
2068 DT_RETURN_MARK(GetStaticFieldID, jfieldID, (const jfieldID&)ret);
2069
2070 // The class should have been loaded (we have an instance of the class
2071 // passed in) so the field and signature should already be in the symbol
2072 // table. If they're not there, the field doesn't exist.
2073 TempNewSymbol fieldname = SymbolTable::probe(name, (int)strlen(name));
2074 TempNewSymbol signame = SymbolTable::probe(sig, (int)strlen(sig));
2075 if (fieldname == nullptr || signame == nullptr) {
2076 THROW_MSG_NULL(vmSymbols::java_lang_NoSuchFieldError(), (char*) name);
2077 }
2078 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz));
2079 // Make sure class is initialized before handing id's out to static fields
2080 k->initialize(CHECK_NULL);
2081
2082 fieldDescriptor fd;
2083 if (!k->is_instance_klass() ||
2084 !InstanceKlass::cast(k)->find_field(fieldname, signame, true, &fd)) {
2085 THROW_MSG_NULL(vmSymbols::java_lang_NoSuchFieldError(), (char*) name);
2086 }
2087
2088 // A jfieldID for a static field is a JNIid specifying the field holder and the offset within the Klass*
2089 JNIid* id = fd.field_holder()->jni_id_for(fd.offset());
2090 DEBUG_ONLY(id->set_is_static_field_id();)
2091
2092 DEBUG_ONLY(id->verify(fd.field_holder()));
2093
2094 ret = jfieldIDWorkaround::to_static_jfieldID(id);
2095 return ret;
2096 JNI_END
2097
2098
2099 JNI_ENTRY(jobject, jni_GetStaticObjectField(JNIEnv *env, jclass clazz, jfieldID fieldID))
2100 HOTSPOT_JNI_GETSTATICOBJECTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID);
2101 #if INCLUDE_JNI_CHECK
2102 DEBUG_ONLY(Klass* param_k = jniCheck::validate_class(thread, clazz);)
2103 #endif // INCLUDE_JNI_CHECK
2104 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID);
2105 assert(id->is_static_field_id(), "invalid static field id");
2106 // Keep JVMTI addition small and only check enabled flag here.
2107 // jni_GetField_probe() assumes that is okay to create handles.
2108 if (JvmtiExport::should_post_field_access()) {
2109 JvmtiExport::jni_GetField_probe(thread, nullptr, nullptr, id->holder(), fieldID, true);
2110 }
2111 jobject ret = JNIHandles::make_local(THREAD, id->holder()->java_mirror()->obj_field(id->offset()));
2112 HOTSPOT_JNI_GETSTATICOBJECTFIELD_RETURN(ret);
2113 return ret;
2114 JNI_END
2115
2116
2117 #define DEFINE_GETSTATICFIELD(Return,Fieldname,Result \
2118 , EntryProbe, ReturnProbe) \
2119 \
2120 DT_RETURN_MARK_DECL_FOR(Result, GetStatic##Result##Field, Return \
2121 , ReturnProbe); \
2122 \
2123 JNI_ENTRY(Return, jni_GetStatic##Result##Field(JNIEnv *env, jclass clazz, jfieldID fieldID)) \
2124 EntryProbe; \
2125 Return ret = 0;\
2126 DT_RETURN_MARK_FOR(Result, GetStatic##Result##Field, Return, \
2127 (const Return&)ret);\
2128 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID); \
2129 assert(id->is_static_field_id(), "invalid static field id"); \
2130 /* Keep JVMTI addition small and only check enabled flag here. */ \
2131 /* jni_GetField_probe() assumes that is okay to create handles. */ \
2132 if (JvmtiExport::should_post_field_access()) { \
2133 JvmtiExport::jni_GetField_probe(thread, nullptr, nullptr, id->holder(), fieldID, true); \
2134 } \
2135 ret = id->holder()->java_mirror()-> Fieldname##_field (id->offset()); \
2136 return ret;\
2137 JNI_END
2138
2139 DEFINE_GETSTATICFIELD(jboolean, bool, Boolean
2140 , HOTSPOT_JNI_GETSTATICBOOLEANFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICBOOLEANFIELD_RETURN(_ret_ref))
2141 DEFINE_GETSTATICFIELD(jbyte, byte, Byte
2142 , HOTSPOT_JNI_GETSTATICBYTEFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICBYTEFIELD_RETURN(_ret_ref) )
2143 DEFINE_GETSTATICFIELD(jchar, char, Char
2144 , HOTSPOT_JNI_GETSTATICCHARFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICCHARFIELD_RETURN(_ret_ref) )
2145 DEFINE_GETSTATICFIELD(jshort, short, Short
2146 , HOTSPOT_JNI_GETSTATICSHORTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICSHORTFIELD_RETURN(_ret_ref) )
2147 DEFINE_GETSTATICFIELD(jint, int, Int
2148 , HOTSPOT_JNI_GETSTATICINTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICINTFIELD_RETURN(_ret_ref) )
2149 DEFINE_GETSTATICFIELD(jlong, long, Long
2150 , HOTSPOT_JNI_GETSTATICLONGFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICLONGFIELD_RETURN(_ret_ref) )
2151 // Float and double probes don't return value because dtrace doesn't currently support it
2152 DEFINE_GETSTATICFIELD(jfloat, float, Float
2153 , HOTSPOT_JNI_GETSTATICFLOATFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICFLOATFIELD_RETURN() )
2154 DEFINE_GETSTATICFIELD(jdouble, double, Double
2155 , HOTSPOT_JNI_GETSTATICDOUBLEFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICDOUBLEFIELD_RETURN() )
2156
2157 JNI_ENTRY(void, jni_SetStaticObjectField(JNIEnv *env, jclass clazz, jfieldID fieldID, jobject value))
2158 HOTSPOT_JNI_SETSTATICOBJECTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value);
2159 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID);
2160 assert(id->is_static_field_id(), "invalid static field id");
2161 // Keep JVMTI addition small and only check enabled flag here.
2162 // jni_SetField_probe() assumes that is okay to create handles.
2163 if (JvmtiExport::should_post_field_modification()) {
2164 jvalue field_value;
2165 field_value.l = value;
2166 JvmtiExport::jni_SetField_probe(thread, nullptr, nullptr, id->holder(), fieldID, true, JVM_SIGNATURE_CLASS, (jvalue *)&field_value);
2167 }
2168 id->holder()->java_mirror()->obj_field_put(id->offset(), JNIHandles::resolve(value));
2169 log_debug_if_final_static_field(THREAD, "SetStaticObjectField", id->holder(), id->offset());
2170 HOTSPOT_JNI_SETSTATICOBJECTFIELD_RETURN();
2171 JNI_END
2172
2173
2174
2175 #define DEFINE_SETSTATICFIELD(Argument,Fieldname,Result,SigType,unionType \
2176 , EntryProbe, ReturnProbe) \
2177 \
2178 JNI_ENTRY(void, jni_SetStatic##Result##Field(JNIEnv *env, jclass clazz, jfieldID fieldID, Argument value)) \
2179 EntryProbe; \
2180 \
2181 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID); \
2182 assert(id->is_static_field_id(), "invalid static field id"); \
2183 /* Keep JVMTI addition small and only check enabled flag here. */ \
2184 /* jni_SetField_probe() assumes that is okay to create handles. */ \
2185 if (JvmtiExport::should_post_field_modification()) { \
2186 jvalue field_value; \
2187 field_value.unionType = value; \
2188 JvmtiExport::jni_SetField_probe(thread, nullptr, nullptr, id->holder(), fieldID, true, SigType, (jvalue *)&field_value); \
2189 } \
2190 id->holder()->java_mirror()-> Fieldname##_field_put (id->offset(), value); \
2191 log_debug_if_final_static_field(THREAD, "SetStatic<Type>Field", id->holder(), id->offset()); \
2192 ReturnProbe;\
2193 JNI_END
2194
2195 DEFINE_SETSTATICFIELD(jboolean, bool, Boolean, JVM_SIGNATURE_BOOLEAN, z
2196 , HOTSPOT_JNI_SETSTATICBOOLEANFIELD_ENTRY(env, clazz, (uintptr_t)fieldID, value),
2197 HOTSPOT_JNI_SETSTATICBOOLEANFIELD_RETURN())
2198 DEFINE_SETSTATICFIELD(jbyte, byte, Byte, JVM_SIGNATURE_BYTE, b
2199 , HOTSPOT_JNI_SETSTATICBYTEFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value),
2200 HOTSPOT_JNI_SETSTATICBYTEFIELD_RETURN())
2201 DEFINE_SETSTATICFIELD(jchar, char, Char, JVM_SIGNATURE_CHAR, c
2202 , HOTSPOT_JNI_SETSTATICCHARFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value),
2203 HOTSPOT_JNI_SETSTATICCHARFIELD_RETURN())
2204 DEFINE_SETSTATICFIELD(jshort, short, Short, JVM_SIGNATURE_SHORT, s
2205 , HOTSPOT_JNI_SETSTATICSHORTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value),
2206 HOTSPOT_JNI_SETSTATICSHORTFIELD_RETURN())
2207 DEFINE_SETSTATICFIELD(jint, int, Int, JVM_SIGNATURE_INT, i
2208 , HOTSPOT_JNI_SETSTATICINTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value),
2209 HOTSPOT_JNI_SETSTATICINTFIELD_RETURN())
2210 DEFINE_SETSTATICFIELD(jlong, long, Long, JVM_SIGNATURE_LONG, j
2211 , HOTSPOT_JNI_SETSTATICLONGFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value),
2212 HOTSPOT_JNI_SETSTATICLONGFIELD_RETURN())
2213 // Float and double probes don't return value because dtrace doesn't currently support it
2214 DEFINE_SETSTATICFIELD(jfloat, float, Float, JVM_SIGNATURE_FLOAT, f
2215 , HOTSPOT_JNI_SETSTATICFLOATFIELD_ENTRY(env, clazz, (uintptr_t) fieldID),
2216 HOTSPOT_JNI_SETSTATICFLOATFIELD_RETURN())
2217 DEFINE_SETSTATICFIELD(jdouble, double, Double, JVM_SIGNATURE_DOUBLE, d
2218 , HOTSPOT_JNI_SETSTATICDOUBLEFIELD_ENTRY(env, clazz, (uintptr_t) fieldID),
2219 HOTSPOT_JNI_SETSTATICDOUBLEFIELD_RETURN())
2220
2221 //
2222 // String Operations
2223 //
2224
2225 // Unicode Interface
2226
2227 DT_RETURN_MARK_DECL(NewString, jstring
2228 , HOTSPOT_JNI_NEWSTRING_RETURN(_ret_ref));
2229
2230 JNI_ENTRY(jstring, jni_NewString(JNIEnv *env, const jchar *unicodeChars, jsize len))
2231 HOTSPOT_JNI_NEWSTRING_ENTRY(env, (uint16_t *) unicodeChars, len);
2232 jstring ret = nullptr;
2233 DT_RETURN_MARK(NewString, jstring, (const jstring&)ret);
2234 oop string=java_lang_String::create_oop_from_unicode((jchar*) unicodeChars, len, CHECK_NULL);
2235 ret = (jstring) JNIHandles::make_local(THREAD, string);
2236 return ret;
2237 JNI_END
2238
2239
2240 JNI_ENTRY_NO_PRESERVE(jsize, jni_GetStringLength(JNIEnv *env, jstring string))
2241 HOTSPOT_JNI_GETSTRINGLENGTH_ENTRY(env, string);
2242 jsize ret = 0;
2243 oop s = JNIHandles::resolve_non_null(string);
2244 ret = java_lang_String::length(s);
2245 HOTSPOT_JNI_GETSTRINGLENGTH_RETURN(ret);
2246 return ret;
2247 JNI_END
2248
2249
2250 JNI_ENTRY_NO_PRESERVE(const jchar*, jni_GetStringChars(
2251 JNIEnv *env, jstring string, jboolean *isCopy))
2252 HOTSPOT_JNI_GETSTRINGCHARS_ENTRY(env, string, (uintptr_t *) isCopy);
2253 jchar* buf = nullptr;
2254 oop s = JNIHandles::resolve_non_null(string);
2255 typeArrayOop s_value = java_lang_String::value(s);
2256 if (s_value != nullptr) {
2257 int s_len = java_lang_String::length(s, s_value);
2258 bool is_latin1 = java_lang_String::is_latin1(s);
2259 buf = NEW_C_HEAP_ARRAY_RETURN_NULL(jchar, s_len + 1, mtInternal); // add one for zero termination
2260 /* JNI Specification states return null on OOM */
2261 if (buf != nullptr) {
2262 if (s_len > 0) {
2263 if (!is_latin1) {
2264 ArrayAccess<>::arraycopy_to_native(s_value, (size_t) typeArrayOopDesc::element_offset<jchar>(0),
2265 buf, s_len);
2266 } else {
2267 for (int i = 0; i < s_len; i++) {
2268 buf[i] = ((jchar) s_value->byte_at(i)) & 0xff;
2269 }
2270 }
2271 }
2272 buf[s_len] = 0;
2273 //%note jni_5
2274 if (isCopy != nullptr) {
2275 *isCopy = JNI_TRUE;
2276 }
2277 }
2278 }
2279 HOTSPOT_JNI_GETSTRINGCHARS_RETURN(buf);
2280 return buf;
2281 JNI_END
2282
2283
2284 JNI_ENTRY_NO_PRESERVE(void, jni_ReleaseStringChars(JNIEnv *env, jstring str, const jchar *chars))
2285 HOTSPOT_JNI_RELEASESTRINGCHARS_ENTRY(env, str, (uint16_t *) chars);
2286 //%note jni_6
2287 if (chars != nullptr) {
2288 // Since String objects are supposed to be immutable, don't copy any
2289 // new data back. A bad user will have to go after the char array.
2290 FreeHeap((void*) chars);
2291 }
2292 HOTSPOT_JNI_RELEASESTRINGCHARS_RETURN();
2293 JNI_END
2294
2295
2296 // UTF Interface
2297
2298 DT_RETURN_MARK_DECL(NewStringUTF, jstring
2299 , HOTSPOT_JNI_NEWSTRINGUTF_RETURN(_ret_ref));
2300
2301 JNI_ENTRY(jstring, jni_NewStringUTF(JNIEnv *env, const char *bytes))
2302 HOTSPOT_JNI_NEWSTRINGUTF_ENTRY(env, (char *) bytes);
2303 jstring ret;
2304 DT_RETURN_MARK(NewStringUTF, jstring, (const jstring&)ret);
2305
2306 oop result = java_lang_String::create_oop_from_str((char*) bytes, CHECK_NULL);
2307 ret = (jstring) JNIHandles::make_local(THREAD, result);
2308 return ret;
2309 JNI_END
2310
2311
2312 JNI_ENTRY(jsize, jni_GetStringUTFLength(JNIEnv *env, jstring string))
2313 HOTSPOT_JNI_GETSTRINGUTFLENGTH_ENTRY(env, string);
2314 oop java_string = JNIHandles::resolve_non_null(string);
2315 jsize ret = java_lang_String::utf8_length_as_int(java_string);
2316 HOTSPOT_JNI_GETSTRINGUTFLENGTH_RETURN(ret);
2317 return ret;
2318 JNI_END
2319
2320 JNI_ENTRY(jlong, jni_GetStringUTFLengthAsLong(JNIEnv *env, jstring string))
2321 HOTSPOT_JNI_GETSTRINGUTFLENGTHASLONG_ENTRY(env, string);
2322 oop java_string = JNIHandles::resolve_non_null(string);
2323 size_t ret = java_lang_String::utf8_length(java_string);
2324 HOTSPOT_JNI_GETSTRINGUTFLENGTHASLONG_RETURN(ret);
2325 return checked_cast<jlong>(ret);
2326 JNI_END
2327
2328
2329 JNI_ENTRY(const char*, jni_GetStringUTFChars(JNIEnv *env, jstring string, jboolean *isCopy))
2330 HOTSPOT_JNI_GETSTRINGUTFCHARS_ENTRY(env, string, (uintptr_t *) isCopy);
2331 char* result = nullptr;
2332 oop java_string = JNIHandles::resolve_non_null(string);
2333 typeArrayOop s_value = java_lang_String::value(java_string);
2334 if (s_value != nullptr) {
2335 size_t length = java_lang_String::utf8_length(java_string, s_value);
2336 // JNI Specification states return null on OOM.
2337 // The resulting sequence doesn't have to be NUL-terminated but we do.
2338 result = AllocateHeap(length + 1, mtInternal, AllocFailStrategy::RETURN_NULL);
2339 if (result != nullptr) {
2340 java_lang_String::as_utf8_string(java_string, s_value, result, length + 1);
2341 if (isCopy != nullptr) {
2342 *isCopy = JNI_TRUE;
2343 }
2344 }
2345 }
2346 HOTSPOT_JNI_GETSTRINGUTFCHARS_RETURN(result);
2347 return result;
2348 JNI_END
2349
2350
2351 JNI_LEAF(void, jni_ReleaseStringUTFChars(JNIEnv *env, jstring str, const char *chars))
2352 HOTSPOT_JNI_RELEASESTRINGUTFCHARS_ENTRY(env, str, (char *) chars);
2353 if (chars != nullptr) {
2354 FreeHeap((char*) chars);
2355 }
2356 HOTSPOT_JNI_RELEASESTRINGUTFCHARS_RETURN();
2357 JNI_END
2358
2359
2360 JNI_ENTRY_NO_PRESERVE(jsize, jni_GetArrayLength(JNIEnv *env, jarray array))
2361 HOTSPOT_JNI_GETARRAYLENGTH_ENTRY(env, array);
2362 arrayOop a = arrayOop(JNIHandles::resolve_non_null(array));
2363 assert(a->is_array(), "must be array");
2364 jsize ret = a->length();
2365 HOTSPOT_JNI_GETARRAYLENGTH_RETURN(ret);
2366 return ret;
2367 JNI_END
2368
2369
2370 //
2371 // Object Array Operations
2372 //
2373
2374 DT_RETURN_MARK_DECL(NewObjectArray, jobjectArray
2375 , HOTSPOT_JNI_NEWOBJECTARRAY_RETURN(_ret_ref));
2376
2377 JNI_ENTRY(jobjectArray, jni_NewObjectArray(JNIEnv *env, jsize length, jclass elementClass, jobject initialElement))
2378 HOTSPOT_JNI_NEWOBJECTARRAY_ENTRY(env, length, elementClass, initialElement);
2379 jobjectArray ret = nullptr;
2380 DT_RETURN_MARK(NewObjectArray, jobjectArray, (const jobjectArray&)ret);
2381 Klass* ek = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(elementClass));
2382
2383 // Make sure bottom_klass is initialized.
2384 ek->initialize(CHECK_NULL);
2385 objArrayOop result = oopFactory::new_objArray(ek, length, CHECK_NULL);
2386
2387 oop initial_value = JNIHandles::resolve(initialElement);
2388 if (initial_value != nullptr) { // array already initialized with null
2389 for (int index = 0; index < length; index++) {
2390 result->obj_at_put(index, initial_value);
2391 }
2392 }
2393 ret = (jobjectArray) JNIHandles::make_local(THREAD, result);
2394 return ret;
2395 JNI_END
2396
2397 DT_RETURN_MARK_DECL(GetObjectArrayElement, jobject
2398 , HOTSPOT_JNI_GETOBJECTARRAYELEMENT_RETURN(_ret_ref));
2399
2400 JNI_ENTRY(jobject, jni_GetObjectArrayElement(JNIEnv *env, jobjectArray array, jsize index))
2401 HOTSPOT_JNI_GETOBJECTARRAYELEMENT_ENTRY(env, array, index);
2402 jobject ret = nullptr;
2403 DT_RETURN_MARK(GetObjectArrayElement, jobject, (const jobject&)ret);
2404 objArrayOop a = objArrayOop(JNIHandles::resolve_non_null(array));
2405 if (a->is_within_bounds(index)) {
2406 oop res = a->obj_at(index, CHECK_NULL);
2407 assert(res != nullptr || !a->is_null_free_array(), "Invalid value");
2408 ret = JNIHandles::make_local(THREAD, res);
2409 return ret;
2410 } else {
2411 ResourceMark rm(THREAD);
2412 stringStream ss;
2413 ss.print("Index %d out of bounds for length %d", index, a->length());
2414 THROW_MSG_NULL(vmSymbols::java_lang_ArrayIndexOutOfBoundsException(), ss.as_string());
2415 }
2416 JNI_END
2417
2418 DT_VOID_RETURN_MARK_DECL(SetObjectArrayElement
2419 , HOTSPOT_JNI_SETOBJECTARRAYELEMENT_RETURN());
2420
2421 JNI_ENTRY(void, jni_SetObjectArrayElement(JNIEnv *env, jobjectArray array, jsize index, jobject value))
2422 HOTSPOT_JNI_SETOBJECTARRAYELEMENT_ENTRY(env, array, index, value);
2423 DT_VOID_RETURN_MARK(SetObjectArrayElement);
2424
2425 objArrayOop a = objArrayOop(JNIHandles::resolve_non_null(array));
2426 oop v = JNIHandles::resolve(value);
2427 if (a->is_within_bounds(index)) {
2428 Klass* ek = a->is_flatArray() ? FlatArrayKlass::cast(a->klass())->element_klass() : RefArrayKlass::cast(a->klass())->element_klass();
2429 if (v == nullptr || v->is_a(ek)) {
2430 a->obj_at_put(index, v, CHECK);
2431 } else {
2432 ResourceMark rm(THREAD);
2433 stringStream ss;
2434 Klass *bottom_kl = ObjArrayKlass::cast(a->klass())->bottom_klass();
2435 ss.print("type mismatch: can not store %s to %s[%d]",
2436 v->klass()->external_name(),
2437 bottom_kl->is_typeArray_klass() ? type2name_tab[ArrayKlass::cast(bottom_kl)->element_type()] : bottom_kl->external_name(),
2438 index);
2439 for (int dims = ArrayKlass::cast(a->klass())->dimension(); dims > 1; --dims) {
2440 ss.print("[]");
2441 }
2442 THROW_MSG(vmSymbols::java_lang_ArrayStoreException(), ss.as_string());
2443 }
2444 } else {
2445 ResourceMark rm(THREAD);
2446 stringStream ss;
2447 ss.print("Index %d out of bounds for length %d", index, a->length());
2448 THROW_MSG(vmSymbols::java_lang_ArrayIndexOutOfBoundsException(), ss.as_string());
2449 }
2450 JNI_END
2451
2452
2453
2454 #define DEFINE_NEWSCALARARRAY(Return,Allocator,Result \
2455 ,EntryProbe,ReturnProbe) \
2456 \
2457 DT_RETURN_MARK_DECL(New##Result##Array, Return \
2458 , ReturnProbe); \
2459 \
2460 JNI_ENTRY(Return, \
2461 jni_New##Result##Array(JNIEnv *env, jsize len)) \
2462 EntryProbe; \
2463 Return ret = nullptr;\
2464 DT_RETURN_MARK(New##Result##Array, Return, (const Return&)ret);\
2465 \
2466 oop obj= oopFactory::Allocator(len, CHECK_NULL); \
2467 ret = (Return) JNIHandles::make_local(THREAD, obj); \
2468 return ret;\
2469 JNI_END
2470
2471 DEFINE_NEWSCALARARRAY(jbooleanArray, new_boolArray, Boolean,
2472 HOTSPOT_JNI_NEWBOOLEANARRAY_ENTRY(env, len),
2473 HOTSPOT_JNI_NEWBOOLEANARRAY_RETURN(_ret_ref))
2474 DEFINE_NEWSCALARARRAY(jbyteArray, new_byteArray, Byte,
2475 HOTSPOT_JNI_NEWBYTEARRAY_ENTRY(env, len),
2476 HOTSPOT_JNI_NEWBYTEARRAY_RETURN(_ret_ref))
2477 DEFINE_NEWSCALARARRAY(jshortArray, new_shortArray, Short,
2478 HOTSPOT_JNI_NEWSHORTARRAY_ENTRY(env, len),
2479 HOTSPOT_JNI_NEWSHORTARRAY_RETURN(_ret_ref))
2480 DEFINE_NEWSCALARARRAY(jcharArray, new_charArray, Char,
2481 HOTSPOT_JNI_NEWCHARARRAY_ENTRY(env, len),
2482 HOTSPOT_JNI_NEWCHARARRAY_RETURN(_ret_ref))
2483 DEFINE_NEWSCALARARRAY(jintArray, new_intArray, Int,
2484 HOTSPOT_JNI_NEWINTARRAY_ENTRY(env, len),
2485 HOTSPOT_JNI_NEWINTARRAY_RETURN(_ret_ref))
2486 DEFINE_NEWSCALARARRAY(jlongArray, new_longArray, Long,
2487 HOTSPOT_JNI_NEWLONGARRAY_ENTRY(env, len),
2488 HOTSPOT_JNI_NEWLONGARRAY_RETURN(_ret_ref))
2489 DEFINE_NEWSCALARARRAY(jfloatArray, new_floatArray, Float,
2490 HOTSPOT_JNI_NEWFLOATARRAY_ENTRY(env, len),
2491 HOTSPOT_JNI_NEWFLOATARRAY_RETURN(_ret_ref))
2492 DEFINE_NEWSCALARARRAY(jdoubleArray, new_doubleArray, Double,
2493 HOTSPOT_JNI_NEWDOUBLEARRAY_ENTRY(env, len),
2494 HOTSPOT_JNI_NEWDOUBLEARRAY_RETURN(_ret_ref))
2495
2496 // Return an address which will fault if the caller writes to it.
2497
2498 static char* get_bad_address() {
2499 static char* bad_address = nullptr;
2500 if (bad_address == nullptr) {
2501 size_t size = os::vm_allocation_granularity();
2502 bad_address = os::reserve_memory(size, mtInternal);
2503 if (bad_address != nullptr) {
2504 os::protect_memory(bad_address, size, os::MEM_PROT_READ,
2505 /*is_committed*/false);
2506 }
2507 }
2508 return bad_address;
2509 }
2510
2511
2512
2513 #define DEFINE_GETSCALARARRAYELEMENTS(ElementType,Result \
2514 , EntryProbe, ReturnProbe) \
2515 \
2516 JNI_ENTRY_NO_PRESERVE(ElementType*, \
2517 jni_Get##Result##ArrayElements(JNIEnv *env, ElementType##Array array, jboolean *isCopy)) \
2518 EntryProbe; \
2519 /* allocate an chunk of memory in c land */ \
2520 typeArrayOop a = typeArrayOop(JNIHandles::resolve_non_null(array)); \
2521 ElementType* result; \
2522 int len = a->length(); \
2523 if (len == 0) { \
2524 if (isCopy != nullptr) { \
2525 *isCopy = JNI_FALSE; \
2526 } \
2527 /* Empty array: legal but useless, can't return null. \
2528 * Return a pointer to something useless. \
2529 * Avoid asserts in typeArrayOop. */ \
2530 result = (ElementType*)get_bad_address(); \
2531 } else { \
2532 /* JNI Specification states return null on OOM */ \
2533 result = NEW_C_HEAP_ARRAY_RETURN_NULL(ElementType, len, mtInternal); \
2534 if (result != nullptr) { \
2535 /* copy the array to the c chunk */ \
2536 ArrayAccess<>::arraycopy_to_native(a, typeArrayOopDesc::element_offset<ElementType>(0), \
2537 result, len); \
2538 if (isCopy) { \
2539 *isCopy = JNI_TRUE; \
2540 } \
2541 } \
2542 } \
2543 ReturnProbe; \
2544 return result; \
2545 JNI_END
2546
2547 DEFINE_GETSCALARARRAYELEMENTS(jboolean, Boolean
2548 , HOTSPOT_JNI_GETBOOLEANARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy),
2549 HOTSPOT_JNI_GETBOOLEANARRAYELEMENTS_RETURN((uintptr_t*)result))
2550 DEFINE_GETSCALARARRAYELEMENTS(jbyte, Byte
2551 , HOTSPOT_JNI_GETBYTEARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy),
2552 HOTSPOT_JNI_GETBYTEARRAYELEMENTS_RETURN((char*)result))
2553 DEFINE_GETSCALARARRAYELEMENTS(jshort, Short
2554 , HOTSPOT_JNI_GETSHORTARRAYELEMENTS_ENTRY(env, (uint16_t*) array, (uintptr_t *) isCopy),
2555 HOTSPOT_JNI_GETSHORTARRAYELEMENTS_RETURN((uint16_t*)result))
2556 DEFINE_GETSCALARARRAYELEMENTS(jchar, Char
2557 , HOTSPOT_JNI_GETCHARARRAYELEMENTS_ENTRY(env, (uint16_t*) array, (uintptr_t *) isCopy),
2558 HOTSPOT_JNI_GETCHARARRAYELEMENTS_RETURN(result))
2559 DEFINE_GETSCALARARRAYELEMENTS(jint, Int
2560 , HOTSPOT_JNI_GETINTARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy),
2561 HOTSPOT_JNI_GETINTARRAYELEMENTS_RETURN((uint32_t*)result))
2562 DEFINE_GETSCALARARRAYELEMENTS(jlong, Long
2563 , HOTSPOT_JNI_GETLONGARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy),
2564 HOTSPOT_JNI_GETLONGARRAYELEMENTS_RETURN(((uintptr_t*)result)))
2565 // Float and double probes don't return value because dtrace doesn't currently support it
2566 DEFINE_GETSCALARARRAYELEMENTS(jfloat, Float
2567 , HOTSPOT_JNI_GETFLOATARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy),
2568 HOTSPOT_JNI_GETFLOATARRAYELEMENTS_RETURN(result))
2569 DEFINE_GETSCALARARRAYELEMENTS(jdouble, Double
2570 , HOTSPOT_JNI_GETDOUBLEARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy),
2571 HOTSPOT_JNI_GETDOUBLEARRAYELEMENTS_RETURN(result))
2572
2573
2574 #define DEFINE_RELEASESCALARARRAYELEMENTS(ElementType,Result \
2575 , EntryProbe, ReturnProbe) \
2576 \
2577 JNI_ENTRY_NO_PRESERVE(void, \
2578 jni_Release##Result##ArrayElements(JNIEnv *env, ElementType##Array array, \
2579 ElementType *buf, jint mode)) \
2580 EntryProbe; \
2581 typeArrayOop a = typeArrayOop(JNIHandles::resolve_non_null(array)); \
2582 int len = a->length(); \
2583 if (len != 0) { /* Empty array: nothing to free or copy. */ \
2584 if ((mode == 0) || (mode == JNI_COMMIT)) { \
2585 ArrayAccess<>::arraycopy_from_native(buf, a, typeArrayOopDesc::element_offset<ElementType>(0), len); \
2586 } \
2587 if ((mode == 0) || (mode == JNI_ABORT)) { \
2588 FreeHeap(buf); \
2589 } \
2590 } \
2591 ReturnProbe; \
2592 JNI_END
2593
2594 DEFINE_RELEASESCALARARRAYELEMENTS(jboolean, Boolean
2595 , HOTSPOT_JNI_RELEASEBOOLEANARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) buf, mode),
2596 HOTSPOT_JNI_RELEASEBOOLEANARRAYELEMENTS_RETURN())
2597 DEFINE_RELEASESCALARARRAYELEMENTS(jbyte, Byte
2598 , HOTSPOT_JNI_RELEASEBYTEARRAYELEMENTS_ENTRY(env, array, (char *) buf, mode),
2599 HOTSPOT_JNI_RELEASEBYTEARRAYELEMENTS_RETURN())
2600 DEFINE_RELEASESCALARARRAYELEMENTS(jshort, Short
2601 , HOTSPOT_JNI_RELEASESHORTARRAYELEMENTS_ENTRY(env, array, (uint16_t *) buf, mode),
2602 HOTSPOT_JNI_RELEASESHORTARRAYELEMENTS_RETURN())
2603 DEFINE_RELEASESCALARARRAYELEMENTS(jchar, Char
2604 , HOTSPOT_JNI_RELEASECHARARRAYELEMENTS_ENTRY(env, array, (uint16_t *) buf, mode),
2605 HOTSPOT_JNI_RELEASECHARARRAYELEMENTS_RETURN())
2606 DEFINE_RELEASESCALARARRAYELEMENTS(jint, Int
2607 , HOTSPOT_JNI_RELEASEINTARRAYELEMENTS_ENTRY(env, array, (uint32_t *) buf, mode),
2608 HOTSPOT_JNI_RELEASEINTARRAYELEMENTS_RETURN())
2609 DEFINE_RELEASESCALARARRAYELEMENTS(jlong, Long
2610 , HOTSPOT_JNI_RELEASELONGARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) buf, mode),
2611 HOTSPOT_JNI_RELEASELONGARRAYELEMENTS_RETURN())
2612 DEFINE_RELEASESCALARARRAYELEMENTS(jfloat, Float
2613 , HOTSPOT_JNI_RELEASEFLOATARRAYELEMENTS_ENTRY(env, array, (float *) buf, mode),
2614 HOTSPOT_JNI_RELEASEFLOATARRAYELEMENTS_RETURN())
2615 DEFINE_RELEASESCALARARRAYELEMENTS(jdouble, Double
2616 , HOTSPOT_JNI_RELEASEDOUBLEARRAYELEMENTS_ENTRY(env, array, (double *) buf, mode),
2617 HOTSPOT_JNI_RELEASEDOUBLEARRAYELEMENTS_RETURN())
2618
2619 static void check_bounds(jsize start, jsize copy_len, jsize array_len, TRAPS) {
2620 ResourceMark rm(THREAD);
2621 if (copy_len < 0) {
2622 stringStream ss;
2623 ss.print("Length %d is negative", copy_len);
2624 THROW_MSG(vmSymbols::java_lang_ArrayIndexOutOfBoundsException(), ss.as_string());
2625 } else if (start < 0 || (start > array_len - copy_len)) {
2626 stringStream ss;
2627 ss.print("Array region %d.." INT64_FORMAT " out of bounds for length %d",
2628 start, (int64_t)start+(int64_t)copy_len, array_len);
2629 THROW_MSG(vmSymbols::java_lang_ArrayIndexOutOfBoundsException(), ss.as_string());
2630 }
2631 }
2632
2633 #define DEFINE_GETSCALARARRAYREGION(ElementType,Result \
2634 , EntryProbe, ReturnProbe) \
2635 DT_VOID_RETURN_MARK_DECL(Get##Result##ArrayRegion \
2636 , ReturnProbe); \
2637 \
2638 JNI_ENTRY(void, \
2639 jni_Get##Result##ArrayRegion(JNIEnv *env, ElementType##Array array, jsize start, \
2640 jsize len, ElementType *buf)) \
2641 EntryProbe; \
2642 DT_VOID_RETURN_MARK(Get##Result##ArrayRegion); \
2643 typeArrayOop src = typeArrayOop(JNIHandles::resolve_non_null(array)); \
2644 check_bounds(start, len, src->length(), CHECK); \
2645 if (len > 0) { \
2646 ArrayAccess<>::arraycopy_to_native(src, typeArrayOopDesc::element_offset<ElementType>(start), buf, len); \
2647 } \
2648 JNI_END
2649
2650 DEFINE_GETSCALARARRAYREGION(jboolean,Boolean
2651 , HOTSPOT_JNI_GETBOOLEANARRAYREGION_ENTRY(env, array, start, len, (uintptr_t *) buf),
2652 HOTSPOT_JNI_GETBOOLEANARRAYREGION_RETURN());
2653 DEFINE_GETSCALARARRAYREGION(jbyte, Byte
2654 , HOTSPOT_JNI_GETBYTEARRAYREGION_ENTRY(env, array, start, len, (char *) buf),
2655 HOTSPOT_JNI_GETBYTEARRAYREGION_RETURN());
2656 DEFINE_GETSCALARARRAYREGION(jshort, Short
2657 , HOTSPOT_JNI_GETSHORTARRAYREGION_ENTRY(env, array, start, len, (uint16_t *) buf),
2658 HOTSPOT_JNI_GETSHORTARRAYREGION_RETURN());
2659 DEFINE_GETSCALARARRAYREGION(jchar, Char
2660 , HOTSPOT_JNI_GETCHARARRAYREGION_ENTRY(env, array, start, len, (uint16_t*) buf),
2661 HOTSPOT_JNI_GETCHARARRAYREGION_RETURN());
2662 DEFINE_GETSCALARARRAYREGION(jint, Int
2663 , HOTSPOT_JNI_GETINTARRAYREGION_ENTRY(env, array, start, len, (uint32_t*) buf),
2664 HOTSPOT_JNI_GETINTARRAYREGION_RETURN());
2665 DEFINE_GETSCALARARRAYREGION(jlong, Long
2666 , HOTSPOT_JNI_GETLONGARRAYREGION_ENTRY(env, array, start, len, (uintptr_t *) buf),
2667 HOTSPOT_JNI_GETLONGARRAYREGION_RETURN());
2668 DEFINE_GETSCALARARRAYREGION(jfloat, Float
2669 , HOTSPOT_JNI_GETFLOATARRAYREGION_ENTRY(env, array, start, len, (float *) buf),
2670 HOTSPOT_JNI_GETFLOATARRAYREGION_RETURN());
2671 DEFINE_GETSCALARARRAYREGION(jdouble, Double
2672 , HOTSPOT_JNI_GETDOUBLEARRAYREGION_ENTRY(env, array, start, len, (double *) buf),
2673 HOTSPOT_JNI_GETDOUBLEARRAYREGION_RETURN());
2674
2675
2676 #define DEFINE_SETSCALARARRAYREGION(ElementType,Result \
2677 , EntryProbe, ReturnProbe) \
2678 DT_VOID_RETURN_MARK_DECL(Set##Result##ArrayRegion \
2679 ,ReturnProbe); \
2680 \
2681 JNI_ENTRY(void, \
2682 jni_Set##Result##ArrayRegion(JNIEnv *env, ElementType##Array array, jsize start, \
2683 jsize len, const ElementType *buf)) \
2684 EntryProbe; \
2685 DT_VOID_RETURN_MARK(Set##Result##ArrayRegion); \
2686 typeArrayOop dst = typeArrayOop(JNIHandles::resolve_non_null(array)); \
2687 check_bounds(start, len, dst->length(), CHECK); \
2688 if (len > 0) { \
2689 ArrayAccess<>::arraycopy_from_native(buf, dst, typeArrayOopDesc::element_offset<ElementType>(start), len); \
2690 } \
2691 JNI_END
2692
2693 DEFINE_SETSCALARARRAYREGION(jboolean, Boolean
2694 , HOTSPOT_JNI_SETBOOLEANARRAYREGION_ENTRY(env, array, start, len, (uintptr_t *)buf),
2695 HOTSPOT_JNI_SETBOOLEANARRAYREGION_RETURN())
2696 DEFINE_SETSCALARARRAYREGION(jbyte, Byte
2697 , HOTSPOT_JNI_SETBYTEARRAYREGION_ENTRY(env, array, start, len, (char *) buf),
2698 HOTSPOT_JNI_SETBYTEARRAYREGION_RETURN())
2699 DEFINE_SETSCALARARRAYREGION(jshort, Short
2700 , HOTSPOT_JNI_SETSHORTARRAYREGION_ENTRY(env, array, start, len, (uint16_t *) buf),
2701 HOTSPOT_JNI_SETSHORTARRAYREGION_RETURN())
2702 DEFINE_SETSCALARARRAYREGION(jchar, Char
2703 , HOTSPOT_JNI_SETCHARARRAYREGION_ENTRY(env, array, start, len, (uint16_t *) buf),
2704 HOTSPOT_JNI_SETCHARARRAYREGION_RETURN())
2705 DEFINE_SETSCALARARRAYREGION(jint, Int
2706 , HOTSPOT_JNI_SETINTARRAYREGION_ENTRY(env, array, start, len, (uint32_t *) buf),
2707 HOTSPOT_JNI_SETINTARRAYREGION_RETURN())
2708 DEFINE_SETSCALARARRAYREGION(jlong, Long
2709 , HOTSPOT_JNI_SETLONGARRAYREGION_ENTRY(env, array, start, len, (uintptr_t *) buf),
2710 HOTSPOT_JNI_SETLONGARRAYREGION_RETURN())
2711 DEFINE_SETSCALARARRAYREGION(jfloat, Float
2712 , HOTSPOT_JNI_SETFLOATARRAYREGION_ENTRY(env, array, start, len, (float *) buf),
2713 HOTSPOT_JNI_SETFLOATARRAYREGION_RETURN())
2714 DEFINE_SETSCALARARRAYREGION(jdouble, Double
2715 , HOTSPOT_JNI_SETDOUBLEARRAYREGION_ENTRY(env, array, start, len, (double *) buf),
2716 HOTSPOT_JNI_SETDOUBLEARRAYREGION_RETURN())
2717
2718
2719 DT_RETURN_MARK_DECL(RegisterNatives, jint
2720 , HOTSPOT_JNI_REGISTERNATIVES_RETURN(_ret_ref));
2721
2722 JNI_ENTRY(jint, jni_RegisterNatives(JNIEnv *env, jclass clazz,
2723 const JNINativeMethod *methods,
2724 jint nMethods))
2725 HOTSPOT_JNI_REGISTERNATIVES_ENTRY(env, clazz, (void *) methods, nMethods);
2726 jint ret = 0;
2727 DT_RETURN_MARK(RegisterNatives, jint, (const jint&)ret);
2728
2729 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz));
2730
2731 // There are no restrictions on native code registering native methods,
2732 // which allows agents to redefine the bindings to native methods, however
2733 // we issue a warning if any code running outside of the boot/platform
2734 // loader is rebinding any native methods in classes loaded by the
2735 // boot/platform loader that are in named modules. That will catch changes
2736 // to platform classes while excluding classes added to the bootclasspath.
2737 bool do_warning = false;
2738
2739 // Only instanceKlasses can have native methods
2740 if (k->is_instance_klass()) {
2741 oop cl = k->class_loader();
2742 InstanceKlass* ik = InstanceKlass::cast(k);
2743 // Check for a platform class
2744 if ((cl == nullptr || SystemDictionary::is_platform_class_loader(cl)) &&
2745 ik->module()->is_named()) {
2746 Klass* caller = thread->security_get_caller_class(1);
2747 // If no caller class, or caller class has a different loader, then
2748 // issue a warning below.
2749 do_warning = (caller == nullptr) || caller->class_loader() != cl;
2750 }
2751 }
2752
2753
2754 for (int index = 0; index < nMethods; index++) {
2755 const char* meth_name = methods[index].name;
2756 const char* meth_sig = methods[index].signature;
2757 int meth_name_len = (int)strlen(meth_name);
2758
2759 // The class should have been loaded (we have an instance of the class
2760 // passed in) so the method and signature should already be in the symbol
2761 // table. If they're not there, the method doesn't exist.
2762 TempNewSymbol name = SymbolTable::probe(meth_name, meth_name_len);
2763 TempNewSymbol signature = SymbolTable::probe(meth_sig, (int)strlen(meth_sig));
2764
2765 if (name == nullptr || signature == nullptr) {
2766 ResourceMark rm(THREAD);
2767 stringStream st;
2768 st.print("Method %s.%s%s not found", k->external_name(), meth_name, meth_sig);
2769 // Must return negative value on failure
2770 THROW_MSG_(vmSymbols::java_lang_NoSuchMethodError(), st.as_string(), -1);
2771 }
2772
2773 if (do_warning) {
2774 ResourceMark rm(THREAD);
2775 log_warning(jni, resolve)("Re-registering of platform native method: %s.%s%s "
2776 "from code in a different classloader", k->external_name(), meth_name, meth_sig);
2777 }
2778
2779 bool res = Method::register_native(k, name, signature,
2780 (address) methods[index].fnPtr, THREAD);
2781 if (!res) {
2782 ret = -1;
2783 break;
2784 }
2785 }
2786 return ret;
2787 JNI_END
2788
2789
2790 JNI_ENTRY(jint, jni_UnregisterNatives(JNIEnv *env, jclass clazz))
2791 HOTSPOT_JNI_UNREGISTERNATIVES_ENTRY(env, clazz);
2792 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz));
2793 //%note jni_2
2794 if (k->is_instance_klass()) {
2795 for (int index = 0; index < InstanceKlass::cast(k)->methods()->length(); index++) {
2796 Method* m = InstanceKlass::cast(k)->methods()->at(index);
2797 if (m->is_native()) {
2798 m->clear_native_function();
2799 m->set_signature_handler(nullptr);
2800 }
2801 }
2802 }
2803 HOTSPOT_JNI_UNREGISTERNATIVES_RETURN(0);
2804 return 0;
2805 JNI_END
2806
2807 //
2808 // Monitor functions
2809 //
2810
2811 DT_RETURN_MARK_DECL(MonitorEnter, jint
2812 , HOTSPOT_JNI_MONITORENTER_RETURN(_ret_ref));
2813
2814 JNI_ENTRY(jint, jni_MonitorEnter(JNIEnv *env, jobject jobj))
2815 HOTSPOT_JNI_MONITORENTER_ENTRY(env, jobj);
2816 jint ret = JNI_ERR;
2817 DT_RETURN_MARK(MonitorEnter, jint, (const jint&)ret);
2818
2819 // If the object is null, we can't do anything with it
2820 if (jobj == nullptr) {
2821 THROW_(vmSymbols::java_lang_NullPointerException(), JNI_ERR);
2822 }
2823
2824 Handle obj(thread, JNIHandles::resolve_non_null(jobj));
2825 ObjectSynchronizer::jni_enter(obj, CHECK_(JNI_ERR));
2826 return JNI_OK;
2827 JNI_END
2828
2829 DT_RETURN_MARK_DECL(MonitorExit, jint
2830 , HOTSPOT_JNI_MONITOREXIT_RETURN(_ret_ref));
2831
2832 JNI_ENTRY(jint, jni_MonitorExit(JNIEnv *env, jobject jobj))
2833 HOTSPOT_JNI_MONITOREXIT_ENTRY(env, jobj);
2834 jint ret = JNI_ERR;
2835 DT_RETURN_MARK(MonitorExit, jint, (const jint&)ret);
2836
2837 // Don't do anything with a null object
2838 if (jobj == nullptr) {
2839 THROW_(vmSymbols::java_lang_NullPointerException(), JNI_ERR);
2840 }
2841
2842 Handle obj(THREAD, JNIHandles::resolve_non_null(jobj));
2843 ObjectSynchronizer::jni_exit(obj(), CHECK_(JNI_ERR));
2844 return JNI_OK;
2845 JNI_END
2846
2847 //
2848 // Extensions
2849 //
2850
2851 DT_VOID_RETURN_MARK_DECL(GetStringRegion
2852 , HOTSPOT_JNI_GETSTRINGREGION_RETURN());
2853
2854 JNI_ENTRY(void, jni_GetStringRegion(JNIEnv *env, jstring string, jsize start, jsize len, jchar *buf))
2855 HOTSPOT_JNI_GETSTRINGREGION_ENTRY(env, string, start, len, buf);
2856 DT_VOID_RETURN_MARK(GetStringRegion);
2857 oop s = JNIHandles::resolve_non_null(string);
2858 typeArrayOop s_value = java_lang_String::value(s);
2859 int s_len = java_lang_String::length(s, s_value);
2860 if (start < 0 || len < 0 || start > s_len - len) {
2861 THROW(vmSymbols::java_lang_StringIndexOutOfBoundsException());
2862 } else {
2863 if (len > 0) {
2864 bool is_latin1 = java_lang_String::is_latin1(s);
2865 if (!is_latin1) {
2866 ArrayAccess<>::arraycopy_to_native(s_value, typeArrayOopDesc::element_offset<jchar>(start),
2867 buf, len);
2868 } else {
2869 for (int i = 0; i < len; i++) {
2870 buf[i] = ((jchar) s_value->byte_at(i + start)) & 0xff;
2871 }
2872 }
2873 }
2874 }
2875 JNI_END
2876
2877 DT_VOID_RETURN_MARK_DECL(GetStringUTFRegion
2878 , HOTSPOT_JNI_GETSTRINGUTFREGION_RETURN());
2879
2880 JNI_ENTRY(void, jni_GetStringUTFRegion(JNIEnv *env, jstring string, jsize start, jsize len, char *buf))
2881 HOTSPOT_JNI_GETSTRINGUTFREGION_ENTRY(env, string, start, len, buf);
2882 DT_VOID_RETURN_MARK(GetStringUTFRegion);
2883 oop s = JNIHandles::resolve_non_null(string);
2884 typeArrayOop s_value = java_lang_String::value(s);
2885 int s_len = java_lang_String::length(s, s_value);
2886 if (start < 0 || len < 0 || start > s_len - len) {
2887 THROW(vmSymbols::java_lang_StringIndexOutOfBoundsException());
2888 } else {
2889 //%note jni_7
2890 if (len > 0) {
2891 // Assume the buffer is large enough as the JNI spec. does not require user error checking
2892 java_lang_String::as_utf8_string(s, s_value, start, len, buf, INT_MAX);
2893 // as_utf8_string null-terminates the result string
2894 } else {
2895 // JDK null-terminates the buffer even in len is zero
2896 if (buf != nullptr) {
2897 buf[0] = 0;
2898 }
2899 }
2900 }
2901 JNI_END
2902
2903 JNI_ENTRY(void*, jni_GetPrimitiveArrayCritical(JNIEnv *env, jarray array, jboolean *isCopy))
2904 HOTSPOT_JNI_GETPRIMITIVEARRAYCRITICAL_ENTRY(env, array, (uintptr_t *) isCopy);
2905 Handle a(thread, JNIHandles::resolve_non_null(array));
2906 assert(a->is_typeArray(), "just checking");
2907
2908 // Pin object
2909 Universe::heap()->pin_object(thread, a());
2910
2911 BasicType type = TypeArrayKlass::cast(a->klass())->element_type();
2912 void* ret = arrayOop(a())->base(type);
2913 if (isCopy != nullptr) {
2914 *isCopy = JNI_FALSE;
2915 }
2916 HOTSPOT_JNI_GETPRIMITIVEARRAYCRITICAL_RETURN(ret);
2917 return ret;
2918 JNI_END
2919
2920
2921 JNI_ENTRY(void, jni_ReleasePrimitiveArrayCritical(JNIEnv *env, jarray array, void *carray, jint mode))
2922 HOTSPOT_JNI_RELEASEPRIMITIVEARRAYCRITICAL_ENTRY(env, array, carray, mode);
2923 // Unpin object
2924 Universe::heap()->unpin_object(thread, JNIHandles::resolve_non_null(array));
2925 HOTSPOT_JNI_RELEASEPRIMITIVEARRAYCRITICAL_RETURN();
2926 JNI_END
2927
2928
2929 JNI_ENTRY(const jchar*, jni_GetStringCritical(JNIEnv *env, jstring string, jboolean *isCopy))
2930 HOTSPOT_JNI_GETSTRINGCRITICAL_ENTRY(env, string, (uintptr_t *) isCopy);
2931 oop s = JNIHandles::resolve_non_null(string);
2932 jchar* ret;
2933 if (!java_lang_String::is_latin1(s)) {
2934 typeArrayHandle s_value(thread, java_lang_String::value(s));
2935
2936 // Pin value array
2937 Universe::heap()->pin_object(thread, s_value());
2938
2939 ret = (jchar*) s_value->base(T_CHAR);
2940 if (isCopy != nullptr) *isCopy = JNI_FALSE;
2941 } else {
2942 // Inflate latin1 encoded string to UTF16
2943 typeArrayOop s_value = java_lang_String::value(s);
2944 int s_len = java_lang_String::length(s, s_value);
2945 ret = NEW_C_HEAP_ARRAY_RETURN_NULL(jchar, s_len + 1, mtInternal); // add one for zero termination
2946 /* JNI Specification states return null on OOM */
2947 if (ret != nullptr) {
2948 for (int i = 0; i < s_len; i++) {
2949 ret[i] = ((jchar) s_value->byte_at(i)) & 0xff;
2950 }
2951 ret[s_len] = 0;
2952 }
2953 if (isCopy != nullptr) *isCopy = JNI_TRUE;
2954 }
2955 HOTSPOT_JNI_GETSTRINGCRITICAL_RETURN((uint16_t *) ret);
2956 return ret;
2957 JNI_END
2958
2959
2960 JNI_ENTRY(void, jni_ReleaseStringCritical(JNIEnv *env, jstring str, const jchar *chars))
2961 HOTSPOT_JNI_RELEASESTRINGCRITICAL_ENTRY(env, str, (uint16_t *) chars);
2962 oop s = JNIHandles::resolve_non_null(str);
2963 bool is_latin1 = java_lang_String::is_latin1(s);
2964
2965 if (is_latin1) {
2966 // For latin1 string, free jchar array allocated by earlier call to GetStringCritical.
2967 // This assumes that ReleaseStringCritical bookends GetStringCritical.
2968 FREE_C_HEAP_ARRAY(jchar, chars);
2969 } else {
2970 // StringDedup can have replaced the value array, so don't fetch the array from 's'.
2971 // Instead, we calculate the address based on the jchar array exposed with GetStringCritical.
2972 oop value = cast_to_oop((address)chars - arrayOopDesc::base_offset_in_bytes(T_CHAR));
2973
2974 // Unpin value array
2975 Universe::heap()->unpin_object(thread, value);
2976 }
2977 HOTSPOT_JNI_RELEASESTRINGCRITICAL_RETURN();
2978 JNI_END
2979
2980
2981 JNI_ENTRY(jweak, jni_NewWeakGlobalRef(JNIEnv *env, jobject ref))
2982 HOTSPOT_JNI_NEWWEAKGLOBALREF_ENTRY(env, ref);
2983 Handle ref_handle(thread, JNIHandles::resolve(ref));
2984 jweak ret = JNIHandles::make_weak_global(ref_handle, AllocFailStrategy::RETURN_NULL);
2985 if (ret == nullptr && ref_handle.not_null()) {
2986 THROW_OOP_(Universe::out_of_memory_error_c_heap(), nullptr);
2987 }
2988 HOTSPOT_JNI_NEWWEAKGLOBALREF_RETURN(ret);
2989 return ret;
2990 JNI_END
2991
2992 // Must be JNI_ENTRY (with HandleMark)
2993 JNI_ENTRY(void, jni_DeleteWeakGlobalRef(JNIEnv *env, jweak ref))
2994 HOTSPOT_JNI_DELETEWEAKGLOBALREF_ENTRY(env, ref);
2995 JNIHandles::destroy_weak_global(ref);
2996 HOTSPOT_JNI_DELETEWEAKGLOBALREF_RETURN();
2997 JNI_END
2998
2999
3000 JNI_ENTRY_NO_PRESERVE(jboolean, jni_ExceptionCheck(JNIEnv *env))
3001 HOTSPOT_JNI_EXCEPTIONCHECK_ENTRY(env);
3002 jni_check_async_exceptions(thread);
3003 jboolean ret = (thread->has_pending_exception()) ? JNI_TRUE : JNI_FALSE;
3004 HOTSPOT_JNI_EXCEPTIONCHECK_RETURN(ret);
3005 return ret;
3006 JNI_END
3007
3008
3009 // Initialization state for three routines below relating to
3010 // java.nio.DirectBuffers
3011 static int directBufferSupportInitializeStarted = 0;
3012 static volatile int directBufferSupportInitializeEnded = 0;
3013 static volatile int directBufferSupportInitializeFailed = 0;
3014 static jclass bufferClass = nullptr;
3015 static jclass directBufferClass = nullptr;
3016 static jclass directByteBufferClass = nullptr;
3017 static jmethodID directByteBufferConstructor = nullptr;
3018 static jfieldID directBufferAddressField = nullptr;
3019 static jfieldID bufferCapacityField = nullptr;
3020
3021 static jclass lookupOne(JNIEnv* env, const char* name, TRAPS) {
3022 Handle loader; // null (bootstrap) loader
3023
3024 TempNewSymbol sym = SymbolTable::new_symbol(name);
3025 jclass result = find_class_from_class_loader(env, sym, true, loader, true, CHECK_NULL);
3026
3027 if (log_is_enabled(Debug, class, resolve) && result != nullptr) {
3028 trace_class_resolution(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(result)));
3029 }
3030 return result;
3031 }
3032
3033 // These lookups are done with the null (bootstrap) ClassLoader to
3034 // circumvent any security checks that would be done by jni_FindClass.
3035 JNI_ENTRY(bool, lookupDirectBufferClasses(JNIEnv* env))
3036 {
3037 if ((bufferClass = lookupOne(env, "java/nio/Buffer", thread)) == nullptr) { return false; }
3038 if ((directBufferClass = lookupOne(env, "sun/nio/ch/DirectBuffer", thread)) == nullptr) { return false; }
3039 if ((directByteBufferClass = lookupOne(env, "java/nio/DirectByteBuffer", thread)) == nullptr) { return false; }
3040 return true;
3041 }
3042 JNI_END
3043
3044
3045 static bool initializeDirectBufferSupport(JNIEnv* env, JavaThread* thread) {
3046 if (directBufferSupportInitializeFailed) {
3047 return false;
3048 }
3049
3050 if (AtomicAccess::cmpxchg(&directBufferSupportInitializeStarted, 0, 1) == 0) {
3051 if (!lookupDirectBufferClasses(env)) {
3052 directBufferSupportInitializeFailed = 1;
3053 return false;
3054 }
3055
3056 // Make global references for these
3057 bufferClass = (jclass) env->NewGlobalRef(bufferClass);
3058 directBufferClass = (jclass) env->NewGlobalRef(directBufferClass);
3059 directByteBufferClass = (jclass) env->NewGlobalRef(directByteBufferClass);
3060
3061 // Global refs will be null if out-of-memory (no exception is pending)
3062 if (bufferClass == nullptr || directBufferClass == nullptr || directByteBufferClass == nullptr) {
3063 directBufferSupportInitializeFailed = 1;
3064 return false;
3065 }
3066
3067 // Get needed field and method IDs
3068 directByteBufferConstructor = env->GetMethodID(directByteBufferClass, "<init>", "(JJ)V");
3069 if (env->ExceptionCheck()) {
3070 env->ExceptionClear();
3071 directBufferSupportInitializeFailed = 1;
3072 return false;
3073 }
3074 directBufferAddressField = env->GetFieldID(bufferClass, "address", "J");
3075 if (env->ExceptionCheck()) {
3076 env->ExceptionClear();
3077 directBufferSupportInitializeFailed = 1;
3078 return false;
3079 }
3080 bufferCapacityField = env->GetFieldID(bufferClass, "capacity", "I");
3081 if (env->ExceptionCheck()) {
3082 env->ExceptionClear();
3083 directBufferSupportInitializeFailed = 1;
3084 return false;
3085 }
3086
3087 if ((directByteBufferConstructor == nullptr) ||
3088 (directBufferAddressField == nullptr) ||
3089 (bufferCapacityField == nullptr)) {
3090 directBufferSupportInitializeFailed = 1;
3091 return false;
3092 }
3093
3094 directBufferSupportInitializeEnded = 1;
3095 } else {
3096 while (!directBufferSupportInitializeEnded && !directBufferSupportInitializeFailed) {
3097 os::naked_yield();
3098 }
3099 }
3100
3101 return !directBufferSupportInitializeFailed;
3102 }
3103
3104 extern "C" jobject JNICALL jni_NewDirectByteBuffer(JNIEnv *env, void* address, jlong capacity)
3105 {
3106 // thread_from_jni_environment() will block if VM is gone.
3107 JavaThread* thread = JavaThread::thread_from_jni_environment(env);
3108
3109 HOTSPOT_JNI_NEWDIRECTBYTEBUFFER_ENTRY(env, address, capacity);
3110
3111 if (!directBufferSupportInitializeEnded) {
3112 if (!initializeDirectBufferSupport(env, thread)) {
3113 HOTSPOT_JNI_NEWDIRECTBYTEBUFFER_RETURN(nullptr);
3114 return nullptr;
3115 }
3116 }
3117
3118 // Being paranoid about accidental sign extension on address
3119 jlong addr = (jlong) ((uintptr_t) address);
3120 jobject ret = env->NewObject(directByteBufferClass, directByteBufferConstructor, addr, capacity);
3121 HOTSPOT_JNI_NEWDIRECTBYTEBUFFER_RETURN(ret);
3122 return ret;
3123 }
3124
3125 DT_RETURN_MARK_DECL(GetDirectBufferAddress, void*
3126 , HOTSPOT_JNI_GETDIRECTBUFFERADDRESS_RETURN((void*) _ret_ref));
3127
3128 extern "C" void* JNICALL jni_GetDirectBufferAddress(JNIEnv *env, jobject buf)
3129 {
3130 // thread_from_jni_environment() will block if VM is gone.
3131 JavaThread* thread = JavaThread::thread_from_jni_environment(env);
3132
3133 HOTSPOT_JNI_GETDIRECTBUFFERADDRESS_ENTRY(env, buf);
3134 void* ret = nullptr;
3135 DT_RETURN_MARK(GetDirectBufferAddress, void*, (const void*&)ret);
3136
3137 if (!directBufferSupportInitializeEnded) {
3138 if (!initializeDirectBufferSupport(env, thread)) {
3139 return nullptr;
3140 }
3141 }
3142
3143 if ((buf != nullptr) && (!env->IsInstanceOf(buf, directBufferClass))) {
3144 return nullptr;
3145 }
3146
3147 ret = (void*)(intptr_t)env->GetLongField(buf, directBufferAddressField);
3148 return ret;
3149 }
3150
3151 DT_RETURN_MARK_DECL(GetDirectBufferCapacity, jlong
3152 , HOTSPOT_JNI_GETDIRECTBUFFERCAPACITY_RETURN(_ret_ref));
3153
3154 extern "C" jlong JNICALL jni_GetDirectBufferCapacity(JNIEnv *env, jobject buf)
3155 {
3156 // thread_from_jni_environment() will block if VM is gone.
3157 JavaThread* thread = JavaThread::thread_from_jni_environment(env);
3158
3159 HOTSPOT_JNI_GETDIRECTBUFFERCAPACITY_ENTRY(env, buf);
3160 jlong ret = -1;
3161 DT_RETURN_MARK(GetDirectBufferCapacity, jlong, (const jlong&)ret);
3162
3163 if (!directBufferSupportInitializeEnded) {
3164 if (!initializeDirectBufferSupport(env, thread)) {
3165 ret = 0;
3166 return ret;
3167 }
3168 }
3169
3170 if (buf == nullptr) {
3171 return -1;
3172 }
3173
3174 if (!env->IsInstanceOf(buf, directBufferClass)) {
3175 return -1;
3176 }
3177
3178 // NOTE that capacity is currently an int in the implementation
3179 ret = env->GetIntField(buf, bufferCapacityField);
3180 return ret;
3181 }
3182
3183
3184 JNI_LEAF(jint, jni_GetVersion(JNIEnv *env))
3185 HOTSPOT_JNI_GETVERSION_ENTRY(env);
3186 HOTSPOT_JNI_GETVERSION_RETURN(CurrentVersion);
3187 return CurrentVersion;
3188 JNI_END
3189
3190 extern struct JavaVM_ main_vm;
3191
3192 JNI_LEAF(jint, jni_GetJavaVM(JNIEnv *env, JavaVM **vm))
3193 HOTSPOT_JNI_GETJAVAVM_ENTRY(env, (void **) vm);
3194 *vm = (JavaVM *)(&main_vm);
3195 HOTSPOT_JNI_GETJAVAVM_RETURN(JNI_OK);
3196 return JNI_OK;
3197 JNI_END
3198
3199
3200 JNI_ENTRY(jobject, jni_GetModule(JNIEnv* env, jclass clazz))
3201 return Modules::get_module(clazz, THREAD);
3202 JNI_END
3203
3204 JNI_ENTRY(jboolean, jni_IsVirtualThread(JNIEnv* env, jobject obj))
3205 oop thread_obj = JNIHandles::resolve_external_guard(obj);
3206 if (thread_obj != nullptr && thread_obj->is_a(vmClasses::BaseVirtualThread_klass())) {
3207 return JNI_TRUE;
3208 } else {
3209 return JNI_FALSE;
3210 }
3211 JNI_END
3212
3213
3214 // Structure containing all jni functions
3215 struct JNINativeInterface_ jni_NativeInterface = {
3216 nullptr,
3217 nullptr,
3218 nullptr,
3219
3220 nullptr,
3221
3222 jni_GetVersion,
3223
3224 jni_DefineClass,
3225 jni_FindClass,
3226
3227 jni_FromReflectedMethod,
3228 jni_FromReflectedField,
3229
3230 jni_ToReflectedMethod,
3231
3232 jni_GetSuperclass,
3233 jni_IsAssignableFrom,
3234
3235 jni_ToReflectedField,
3236
3237 jni_Throw,
3238 jni_ThrowNew,
3239 jni_ExceptionOccurred,
3240 jni_ExceptionDescribe,
3241 jni_ExceptionClear,
3242 jni_FatalError,
3243
3244 jni_PushLocalFrame,
3245 jni_PopLocalFrame,
3246
3247 jni_NewGlobalRef,
3248 jni_DeleteGlobalRef,
3249 jni_DeleteLocalRef,
3250 jni_IsSameObject,
3251
3252 jni_NewLocalRef,
3253 jni_EnsureLocalCapacity,
3254
3255 jni_AllocObject,
3256 jni_NewObject,
3257 jni_NewObjectV,
3258 jni_NewObjectA,
3259
3260 jni_GetObjectClass,
3261 jni_IsInstanceOf,
3262
3263 jni_GetMethodID,
3264
3265 jni_CallObjectMethod,
3266 jni_CallObjectMethodV,
3267 jni_CallObjectMethodA,
3268 jni_CallBooleanMethod,
3269 jni_CallBooleanMethodV,
3270 jni_CallBooleanMethodA,
3271 jni_CallByteMethod,
3272 jni_CallByteMethodV,
3273 jni_CallByteMethodA,
3274 jni_CallCharMethod,
3275 jni_CallCharMethodV,
3276 jni_CallCharMethodA,
3277 jni_CallShortMethod,
3278 jni_CallShortMethodV,
3279 jni_CallShortMethodA,
3280 jni_CallIntMethod,
3281 jni_CallIntMethodV,
3282 jni_CallIntMethodA,
3283 jni_CallLongMethod,
3284 jni_CallLongMethodV,
3285 jni_CallLongMethodA,
3286 jni_CallFloatMethod,
3287 jni_CallFloatMethodV,
3288 jni_CallFloatMethodA,
3289 jni_CallDoubleMethod,
3290 jni_CallDoubleMethodV,
3291 jni_CallDoubleMethodA,
3292 jni_CallVoidMethod,
3293 jni_CallVoidMethodV,
3294 jni_CallVoidMethodA,
3295
3296 jni_CallNonvirtualObjectMethod,
3297 jni_CallNonvirtualObjectMethodV,
3298 jni_CallNonvirtualObjectMethodA,
3299 jni_CallNonvirtualBooleanMethod,
3300 jni_CallNonvirtualBooleanMethodV,
3301 jni_CallNonvirtualBooleanMethodA,
3302 jni_CallNonvirtualByteMethod,
3303 jni_CallNonvirtualByteMethodV,
3304 jni_CallNonvirtualByteMethodA,
3305 jni_CallNonvirtualCharMethod,
3306 jni_CallNonvirtualCharMethodV,
3307 jni_CallNonvirtualCharMethodA,
3308 jni_CallNonvirtualShortMethod,
3309 jni_CallNonvirtualShortMethodV,
3310 jni_CallNonvirtualShortMethodA,
3311 jni_CallNonvirtualIntMethod,
3312 jni_CallNonvirtualIntMethodV,
3313 jni_CallNonvirtualIntMethodA,
3314 jni_CallNonvirtualLongMethod,
3315 jni_CallNonvirtualLongMethodV,
3316 jni_CallNonvirtualLongMethodA,
3317 jni_CallNonvirtualFloatMethod,
3318 jni_CallNonvirtualFloatMethodV,
3319 jni_CallNonvirtualFloatMethodA,
3320 jni_CallNonvirtualDoubleMethod,
3321 jni_CallNonvirtualDoubleMethodV,
3322 jni_CallNonvirtualDoubleMethodA,
3323 jni_CallNonvirtualVoidMethod,
3324 jni_CallNonvirtualVoidMethodV,
3325 jni_CallNonvirtualVoidMethodA,
3326
3327 jni_GetFieldID,
3328
3329 jni_GetObjectField,
3330 jni_GetBooleanField,
3331 jni_GetByteField,
3332 jni_GetCharField,
3333 jni_GetShortField,
3334 jni_GetIntField,
3335 jni_GetLongField,
3336 jni_GetFloatField,
3337 jni_GetDoubleField,
3338
3339 jni_SetObjectField,
3340 jni_SetBooleanField,
3341 jni_SetByteField,
3342 jni_SetCharField,
3343 jni_SetShortField,
3344 jni_SetIntField,
3345 jni_SetLongField,
3346 jni_SetFloatField,
3347 jni_SetDoubleField,
3348
3349 jni_GetStaticMethodID,
3350
3351 jni_CallStaticObjectMethod,
3352 jni_CallStaticObjectMethodV,
3353 jni_CallStaticObjectMethodA,
3354 jni_CallStaticBooleanMethod,
3355 jni_CallStaticBooleanMethodV,
3356 jni_CallStaticBooleanMethodA,
3357 jni_CallStaticByteMethod,
3358 jni_CallStaticByteMethodV,
3359 jni_CallStaticByteMethodA,
3360 jni_CallStaticCharMethod,
3361 jni_CallStaticCharMethodV,
3362 jni_CallStaticCharMethodA,
3363 jni_CallStaticShortMethod,
3364 jni_CallStaticShortMethodV,
3365 jni_CallStaticShortMethodA,
3366 jni_CallStaticIntMethod,
3367 jni_CallStaticIntMethodV,
3368 jni_CallStaticIntMethodA,
3369 jni_CallStaticLongMethod,
3370 jni_CallStaticLongMethodV,
3371 jni_CallStaticLongMethodA,
3372 jni_CallStaticFloatMethod,
3373 jni_CallStaticFloatMethodV,
3374 jni_CallStaticFloatMethodA,
3375 jni_CallStaticDoubleMethod,
3376 jni_CallStaticDoubleMethodV,
3377 jni_CallStaticDoubleMethodA,
3378 jni_CallStaticVoidMethod,
3379 jni_CallStaticVoidMethodV,
3380 jni_CallStaticVoidMethodA,
3381
3382 jni_GetStaticFieldID,
3383
3384 jni_GetStaticObjectField,
3385 jni_GetStaticBooleanField,
3386 jni_GetStaticByteField,
3387 jni_GetStaticCharField,
3388 jni_GetStaticShortField,
3389 jni_GetStaticIntField,
3390 jni_GetStaticLongField,
3391 jni_GetStaticFloatField,
3392 jni_GetStaticDoubleField,
3393
3394 jni_SetStaticObjectField,
3395 jni_SetStaticBooleanField,
3396 jni_SetStaticByteField,
3397 jni_SetStaticCharField,
3398 jni_SetStaticShortField,
3399 jni_SetStaticIntField,
3400 jni_SetStaticLongField,
3401 jni_SetStaticFloatField,
3402 jni_SetStaticDoubleField,
3403
3404 jni_NewString,
3405 jni_GetStringLength,
3406 jni_GetStringChars,
3407 jni_ReleaseStringChars,
3408
3409 jni_NewStringUTF,
3410 jni_GetStringUTFLength,
3411 jni_GetStringUTFChars,
3412 jni_ReleaseStringUTFChars,
3413
3414 jni_GetArrayLength,
3415
3416 jni_NewObjectArray,
3417 jni_GetObjectArrayElement,
3418 jni_SetObjectArrayElement,
3419
3420 jni_NewBooleanArray,
3421 jni_NewByteArray,
3422 jni_NewCharArray,
3423 jni_NewShortArray,
3424 jni_NewIntArray,
3425 jni_NewLongArray,
3426 jni_NewFloatArray,
3427 jni_NewDoubleArray,
3428
3429 jni_GetBooleanArrayElements,
3430 jni_GetByteArrayElements,
3431 jni_GetCharArrayElements,
3432 jni_GetShortArrayElements,
3433 jni_GetIntArrayElements,
3434 jni_GetLongArrayElements,
3435 jni_GetFloatArrayElements,
3436 jni_GetDoubleArrayElements,
3437
3438 jni_ReleaseBooleanArrayElements,
3439 jni_ReleaseByteArrayElements,
3440 jni_ReleaseCharArrayElements,
3441 jni_ReleaseShortArrayElements,
3442 jni_ReleaseIntArrayElements,
3443 jni_ReleaseLongArrayElements,
3444 jni_ReleaseFloatArrayElements,
3445 jni_ReleaseDoubleArrayElements,
3446
3447 jni_GetBooleanArrayRegion,
3448 jni_GetByteArrayRegion,
3449 jni_GetCharArrayRegion,
3450 jni_GetShortArrayRegion,
3451 jni_GetIntArrayRegion,
3452 jni_GetLongArrayRegion,
3453 jni_GetFloatArrayRegion,
3454 jni_GetDoubleArrayRegion,
3455
3456 jni_SetBooleanArrayRegion,
3457 jni_SetByteArrayRegion,
3458 jni_SetCharArrayRegion,
3459 jni_SetShortArrayRegion,
3460 jni_SetIntArrayRegion,
3461 jni_SetLongArrayRegion,
3462 jni_SetFloatArrayRegion,
3463 jni_SetDoubleArrayRegion,
3464
3465 jni_RegisterNatives,
3466 jni_UnregisterNatives,
3467
3468 jni_MonitorEnter,
3469 jni_MonitorExit,
3470
3471 jni_GetJavaVM,
3472
3473 jni_GetStringRegion,
3474 jni_GetStringUTFRegion,
3475
3476 jni_GetPrimitiveArrayCritical,
3477 jni_ReleasePrimitiveArrayCritical,
3478
3479 jni_GetStringCritical,
3480 jni_ReleaseStringCritical,
3481
3482 jni_NewWeakGlobalRef,
3483 jni_DeleteWeakGlobalRef,
3484
3485 jni_ExceptionCheck,
3486
3487 jni_NewDirectByteBuffer,
3488 jni_GetDirectBufferAddress,
3489 jni_GetDirectBufferCapacity,
3490
3491 // New 1_6 features
3492
3493 jni_GetObjectRefType,
3494
3495 // Module features
3496
3497 jni_GetModule,
3498
3499 // Virtual threads
3500
3501 jni_IsVirtualThread,
3502
3503 // Large UTF8 support
3504
3505 jni_GetStringUTFLengthAsLong
3506 };
3507
3508
3509 // For jvmti use to modify jni function table.
3510 // Java threads in native contiues to run until it is transitioned
3511 // to VM at safepoint. Before the transition or before it is blocked
3512 // for safepoint it may access jni function table. VM could crash if
3513 // any java thread access the jni function table in the middle of memcpy.
3514 // To avoid this each function pointers are copied automically.
3515 void copy_jni_function_table(const struct JNINativeInterface_ *new_jni_NativeInterface) {
3516 assert(SafepointSynchronize::is_at_safepoint(), "must be at safepoint");
3517 intptr_t *a = (intptr_t *) jni_functions();
3518 intptr_t *b = (intptr_t *) new_jni_NativeInterface;
3519 for (uint i=0; i < sizeof(struct JNINativeInterface_)/sizeof(void *); i++) {
3520 AtomicAccess::store(a++, *b++);
3521 }
3522 }
3523
3524 void quicken_jni_functions() {
3525 // Replace Get<Primitive>Field with fast versions
3526 if (UseFastJNIAccessors && !VerifyJNIFields && !CheckJNICalls) {
3527 address func;
3528 func = JNI_FastGetField::generate_fast_get_boolean_field();
3529 if (func != (address)-1) {
3530 jni_NativeInterface.GetBooleanField = (GetBooleanField_t)func;
3531 }
3532 func = JNI_FastGetField::generate_fast_get_byte_field();
3533 if (func != (address)-1) {
3534 jni_NativeInterface.GetByteField = (GetByteField_t)func;
3535 }
3536 func = JNI_FastGetField::generate_fast_get_char_field();
3537 if (func != (address)-1) {
3538 jni_NativeInterface.GetCharField = (GetCharField_t)func;
3539 }
3540 func = JNI_FastGetField::generate_fast_get_short_field();
3541 if (func != (address)-1) {
3542 jni_NativeInterface.GetShortField = (GetShortField_t)func;
3543 }
3544 func = JNI_FastGetField::generate_fast_get_int_field();
3545 if (func != (address)-1) {
3546 jni_NativeInterface.GetIntField = (GetIntField_t)func;
3547 }
3548 func = JNI_FastGetField::generate_fast_get_long_field();
3549 if (func != (address)-1) {
3550 jni_NativeInterface.GetLongField = (GetLongField_t)func;
3551 }
3552 func = JNI_FastGetField::generate_fast_get_float_field();
3553 if (func != (address)-1) {
3554 jni_NativeInterface.GetFloatField = (GetFloatField_t)func;
3555 }
3556 func = JNI_FastGetField::generate_fast_get_double_field();
3557 if (func != (address)-1) {
3558 jni_NativeInterface.GetDoubleField = (GetDoubleField_t)func;
3559 }
3560 }
3561 }
3562
3563 // Returns the function structure
3564 struct JNINativeInterface_* jni_functions() {
3565 #if INCLUDE_JNI_CHECK
3566 if (CheckJNICalls) return jni_functions_check();
3567 #endif // INCLUDE_JNI_CHECK
3568 return &jni_NativeInterface;
3569 }
3570
3571 // Returns the function structure
3572 struct JNINativeInterface_* jni_functions_nocheck() {
3573 return &jni_NativeInterface;
3574 }
3575
3576
3577 // Invocation API
3578
3579
3580 // Forward declaration
3581 extern const struct JNIInvokeInterface_ jni_InvokeInterface;
3582
3583 // Global invocation API vars
3584 enum VM_Creation_State {
3585 NOT_CREATED = 0,
3586 IN_PROGRESS, // Most JNI operations are permitted during this phase to
3587 // allow for initialization actions by libraries and agents.
3588 COMPLETE
3589 };
3590
3591 volatile VM_Creation_State vm_created = NOT_CREATED;
3592
3593 bool is_vm_created() {
3594 return AtomicAccess::load(&vm_created) == COMPLETE;
3595 }
3596
3597 // Indicate whether it is safe to recreate VM. Recreation is only
3598 // possible after a failed initial creation attempt in some cases.
3599 volatile int safe_to_recreate_vm = 1;
3600 struct JavaVM_ main_vm = {&jni_InvokeInterface};
3601
3602
3603 #define JAVASTACKSIZE (400 * 1024) /* Default size of a thread java stack */
3604 enum { VERIFY_NONE, VERIFY_REMOTE, VERIFY_ALL };
3605
3606 DT_RETURN_MARK_DECL(GetDefaultJavaVMInitArgs, jint
3607 , HOTSPOT_JNI_GETDEFAULTJAVAVMINITARGS_RETURN(_ret_ref));
3608
3609 _JNI_IMPORT_OR_EXPORT_ jint JNICALL JNI_GetDefaultJavaVMInitArgs(void *args_) {
3610 HOTSPOT_JNI_GETDEFAULTJAVAVMINITARGS_ENTRY(args_);
3611 JDK1_1InitArgs *args = (JDK1_1InitArgs *)args_;
3612 jint ret = JNI_ERR;
3613 DT_RETURN_MARK(GetDefaultJavaVMInitArgs, jint, (const jint&)ret);
3614
3615 if (Threads::is_supported_jni_version(args->version)) {
3616 ret = JNI_OK;
3617 }
3618 // 1.1 style no longer supported in hotspot.
3619 // According the JNI spec, we should update args->version on return.
3620 // We also use the structure to communicate with launcher about default
3621 // stack size.
3622 if (args->version == JNI_VERSION_1_1) {
3623 args->version = JNI_VERSION_1_2;
3624 // javaStackSize is int in arguments structure
3625 assert(jlong(ThreadStackSize) * K < INT_MAX, "integer overflow");
3626 args->javaStackSize = (jint)(ThreadStackSize * K);
3627 }
3628 return ret;
3629 }
3630
3631 DT_RETURN_MARK_DECL(CreateJavaVM, jint
3632 , HOTSPOT_JNI_CREATEJAVAVM_RETURN(_ret_ref));
3633
3634 static jint JNI_CreateJavaVM_inner(JavaVM **vm, void **penv, void *args) {
3635 HOTSPOT_JNI_CREATEJAVAVM_ENTRY((void **) vm, penv, args);
3636
3637 jint result = JNI_ERR;
3638 DT_RETURN_MARK(CreateJavaVM, jint, (const jint&)result);
3639
3640 // We're about to use AtomicAccess::xchg for synchronization. Some Zero
3641 // platforms use the GCC builtin __sync_lock_test_and_set for this,
3642 // but __sync_lock_test_and_set is not guaranteed to do what we want
3643 // on all architectures. So we check it works before relying on it.
3644 #if defined(ZERO) && defined(ASSERT)
3645 {
3646 jint a = 0xcafebabe;
3647 jint b = AtomicAccess::xchg(&a, (jint) 0xdeadbeef);
3648 void *c = &a;
3649 void *d = AtomicAccess::xchg(&c, &b);
3650 assert(a == (jint) 0xdeadbeef && b == (jint) 0xcafebabe, "AtomicAccess::xchg() works");
3651 assert(c == &b && d == &a, "AtomicAccess::xchg() works");
3652 }
3653 #endif // ZERO && ASSERT
3654
3655 // At the moment it's only possible to have one Java VM,
3656 // since some of the runtime state is in global variables.
3657
3658 // We cannot use our mutex locks here, since they only work on
3659 // Threads. We do an atomic compare and exchange to ensure only
3660 // one thread can call this method at a time
3661
3662 // We use AtomicAccess::xchg rather than AtomicAccess::add/dec since on some platforms
3663 // the add/dec implementations are dependent on whether we are running
3664 // on a multiprocessor AtomicAccess::xchg does not have this problem.
3665 if (AtomicAccess::xchg(&vm_created, IN_PROGRESS) != NOT_CREATED) {
3666 return JNI_EEXIST; // already created, or create attempt in progress
3667 }
3668
3669 // If a previous creation attempt failed but can be retried safely,
3670 // then safe_to_recreate_vm will have been reset to 1 after being
3671 // cleared here. If a previous creation attempt succeeded and we then
3672 // destroyed that VM, we will be prevented from trying to recreate
3673 // the VM in the same process, as the value will still be 0.
3674 if (AtomicAccess::xchg(&safe_to_recreate_vm, 0) == 0) {
3675 return JNI_ERR;
3676 }
3677
3678 /**
3679 * Certain errors during initialization are recoverable and do not
3680 * prevent this method from being called again at a later time
3681 * (perhaps with different arguments). However, at a certain
3682 * point during initialization if an error occurs we cannot allow
3683 * this function to be called again (or it will crash). In those
3684 * situations, the 'canTryAgain' flag is set to false, which atomically
3685 * sets safe_to_recreate_vm to 1, such that any new call to
3686 * JNI_CreateJavaVM will immediately fail using the above logic.
3687 */
3688 bool can_try_again = true;
3689
3690 result = Threads::create_vm((JavaVMInitArgs*) args, &can_try_again);
3691 if (result == JNI_OK) {
3692 JavaThread *thread = JavaThread::current();
3693 assert(!thread->has_pending_exception(), "should have returned not OK");
3694 // thread is thread_in_vm here
3695 *vm = (JavaVM *)(&main_vm);
3696 *(JNIEnv**)penv = thread->jni_environment();
3697 // mark creation complete for other JNI ops
3698 AtomicAccess::release_store(&vm_created, COMPLETE);
3699
3700 #if INCLUDE_JVMCI
3701 if (EnableJVMCI) {
3702 if (UseJVMCICompiler) {
3703 // JVMCI is initialized on a CompilerThread
3704 if (BootstrapJVMCI) {
3705 JavaThread* THREAD = thread; // For exception macros.
3706 JVMCICompiler* compiler = JVMCICompiler::instance(true, CATCH);
3707 compiler->bootstrap(THREAD);
3708 if (HAS_PENDING_EXCEPTION) {
3709 HandleMark hm(THREAD);
3710 vm_exit_during_initialization(Handle(THREAD, PENDING_EXCEPTION));
3711 }
3712 }
3713 }
3714 }
3715 #endif
3716
3717 // Notify JVMTI
3718 if (JvmtiExport::should_post_thread_life()) {
3719 JvmtiExport::post_thread_start(thread);
3720 }
3721
3722 JFR_ONLY(Jfr::on_thread_start(thread);)
3723
3724 if (ReplayCompiles) ciReplay::replay(thread);
3725
3726 #ifdef ASSERT
3727 // Some platforms (like Win*) need a wrapper around these test
3728 // functions in order to properly handle error conditions.
3729 if (ErrorHandlerTest != 0) {
3730 VMError::controlled_crash(ErrorHandlerTest);
3731 }
3732 #endif
3733
3734 // Since this is not a JVM_ENTRY we have to set the thread state manually before leaving.
3735 ThreadStateTransition::transition_from_vm(thread, _thread_in_native);
3736 MACOS_AARCH64_ONLY(thread->enable_wx(WXExec));
3737 } else {
3738 // If create_vm exits because of a pending exception, exit with that
3739 // exception. In the future when we figure out how to reclaim memory,
3740 // we may be able to exit with JNI_ERR and allow the calling application
3741 // to continue.
3742 if (Universe::is_fully_initialized()) {
3743 // otherwise no pending exception possible - VM will already have aborted
3744 Thread* current = Thread::current_or_null();
3745 if (current != nullptr) {
3746 JavaThread* THREAD = JavaThread::cast(current); // For exception macros.
3747 assert(HAS_PENDING_EXCEPTION, "must be - else no current thread exists");
3748 HandleMark hm(THREAD);
3749 vm_exit_during_initialization(Handle(THREAD, PENDING_EXCEPTION));
3750 }
3751 }
3752
3753 if (can_try_again) {
3754 // reset safe_to_recreate_vm to 1 so that retrial would be possible
3755 safe_to_recreate_vm = 1;
3756 }
3757
3758 // Creation failed. We must reset vm_created
3759 *vm = nullptr;
3760 *(JNIEnv**)penv = nullptr;
3761 // reset vm_created last to avoid race condition. Use OrderAccess to
3762 // control both compiler and architectural-based reordering.
3763 assert(vm_created == IN_PROGRESS, "must be");
3764 AtomicAccess::release_store(&vm_created, NOT_CREATED);
3765 }
3766
3767 // Flush stdout and stderr before exit.
3768 fflush(stdout);
3769 fflush(stderr);
3770
3771 return result;
3772
3773 }
3774
3775 _JNI_IMPORT_OR_EXPORT_ jint JNICALL JNI_CreateJavaVM(JavaVM **vm, void **penv, void *args) {
3776 jint result = JNI_ERR;
3777 // On Windows, let CreateJavaVM run with SEH protection
3778 #if defined(_WIN32) && !defined(USE_VECTORED_EXCEPTION_HANDLING)
3779 __try {
3780 #endif
3781 result = JNI_CreateJavaVM_inner(vm, penv, args);
3782 #if defined(_WIN32) && !defined(USE_VECTORED_EXCEPTION_HANDLING)
3783 } __except(topLevelExceptionFilter((_EXCEPTION_POINTERS*)_exception_info())) {
3784 // Nothing to do.
3785 }
3786 #endif
3787 return result;
3788 }
3789
3790 _JNI_IMPORT_OR_EXPORT_ jint JNICALL JNI_GetCreatedJavaVMs(JavaVM **vm_buf, jsize bufLen, jsize *numVMs) {
3791 HOTSPOT_JNI_GETCREATEDJAVAVMS_ENTRY((void **) vm_buf, bufLen, (uintptr_t *) numVMs);
3792
3793 if (vm_created == COMPLETE) {
3794 if (numVMs != nullptr) *numVMs = 1;
3795 if (bufLen > 0) *vm_buf = (JavaVM *)(&main_vm);
3796 } else {
3797 if (numVMs != nullptr) *numVMs = 0;
3798 }
3799 HOTSPOT_JNI_GETCREATEDJAVAVMS_RETURN(JNI_OK);
3800 return JNI_OK;
3801 }
3802
3803 extern "C" {
3804
3805 DT_RETURN_MARK_DECL(DestroyJavaVM, jint
3806 , HOTSPOT_JNI_DESTROYJAVAVM_RETURN(_ret_ref));
3807
3808 static jint JNICALL jni_DestroyJavaVM_inner(JavaVM *vm) {
3809 HOTSPOT_JNI_DESTROYJAVAVM_ENTRY(vm);
3810 jint res = JNI_ERR;
3811 DT_RETURN_MARK(DestroyJavaVM, jint, (const jint&)res);
3812
3813 if (vm_created == NOT_CREATED) {
3814 res = JNI_ERR;
3815 return res;
3816 }
3817
3818 JNIEnv *env;
3819 JavaVMAttachArgs destroyargs;
3820 destroyargs.version = CurrentVersion;
3821 destroyargs.name = (char *)"DestroyJavaVM";
3822 destroyargs.group = nullptr;
3823 res = vm->AttachCurrentThread((void **)&env, (void *)&destroyargs);
3824 if (res != JNI_OK) {
3825 return res;
3826 }
3827
3828 JavaThread* thread = JavaThread::current();
3829
3830 // Make sure we are actually in a newly attached thread, with no
3831 // existing Java frame.
3832 if (thread->has_last_Java_frame()) {
3833 return JNI_ERR;
3834 }
3835
3836 // Since this is not a JVM_ENTRY we have to set the thread state manually before entering.
3837
3838 // We are going to VM, change W^X state to the expected one.
3839 MACOS_AARCH64_ONLY(WXMode oldmode = thread->enable_wx(WXWrite));
3840
3841 ThreadStateTransition::transition_from_native(thread, _thread_in_vm);
3842 Threads::destroy_vm();
3843 // Don't bother restoring thread state, VM is gone.
3844 vm_created = NOT_CREATED;
3845 return JNI_OK;
3846 }
3847
3848 jint JNICALL jni_DestroyJavaVM(JavaVM *vm) {
3849 jint result = JNI_ERR;
3850 // On Windows, we need SEH protection
3851 #if defined(_WIN32) && !defined(USE_VECTORED_EXCEPTION_HANDLING)
3852 __try {
3853 #endif
3854 result = jni_DestroyJavaVM_inner(vm);
3855 #if defined(_WIN32) && !defined(USE_VECTORED_EXCEPTION_HANDLING)
3856 } __except(topLevelExceptionFilter((_EXCEPTION_POINTERS*)_exception_info())) {
3857 // Nothing to do.
3858 }
3859 #endif
3860 return result;
3861 }
3862
3863 static jint attach_current_thread(JavaVM *vm, void **penv, void *_args, bool daemon) {
3864 JavaVMAttachArgs *args = (JavaVMAttachArgs *) _args;
3865
3866 // Check below commented out from JDK1.2fcs as well
3867 /*
3868 if (args && (args->version != JNI_VERSION_1_1 || args->version != JNI_VERSION_1_2)) {
3869 return JNI_EVERSION;
3870 }
3871 */
3872
3873 Thread* t = Thread::current_or_null();
3874 if (t != nullptr) {
3875 // If executing from an atexit hook we may be in the VMThread.
3876 if (t->is_Java_thread()) {
3877 // If the thread has been attached this operation is a no-op
3878 *(JNIEnv**)penv = JavaThread::cast(t)->jni_environment();
3879 return JNI_OK;
3880 } else {
3881 return JNI_ERR;
3882 }
3883 }
3884
3885 // Create a thread and mark it as attaching so it will be skipped by the
3886 // ThreadsListEnumerator - see CR 6404306
3887 JavaThread* thread = JavaThread::create_attaching_thread();
3888
3889 // Set correct safepoint info. The thread is going to call into Java when
3890 // initializing the Java level thread object. Hence, the correct state must
3891 // be set in order for the Safepoint code to deal with it correctly.
3892 thread->set_thread_state(_thread_in_vm);
3893 thread->record_stack_base_and_size();
3894 thread->initialize_thread_current();
3895 thread->register_thread_stack_with_NMT();
3896 MACOS_AARCH64_ONLY(thread->init_wx());
3897
3898 if (!os::create_attached_thread(thread)) {
3899 thread->unregister_thread_stack_with_NMT();
3900 thread->smr_delete();
3901 return JNI_ERR;
3902 }
3903 // Enable stack overflow checks
3904 thread->stack_overflow_state()->create_stack_guard_pages();
3905
3906 thread->initialize_tlab();
3907
3908 thread->cache_global_variables();
3909
3910 // Set the _monitor_owner_id to the next thread_id temporarily while initialization runs.
3911 // Do it now before we make this thread visible in Threads::add().
3912 thread->set_monitor_owner_id(ThreadIdentifier::next());
3913
3914 // This thread will not do a safepoint check, since it has
3915 // not been added to the Thread list yet.
3916 { MutexLocker ml(Threads_lock);
3917 // This must be inside this lock in order to get FullGCALot to work properly, i.e., to
3918 // avoid this thread trying to do a GC before it is added to the thread-list
3919 thread->set_active_handles(JNIHandleBlock::allocate_block());
3920 Threads::add(thread, daemon);
3921 }
3922 // Create thread group and name info from attach arguments
3923 oop group = nullptr;
3924 char* thread_name = nullptr;
3925 if (args != nullptr && Threads::is_supported_jni_version(args->version)) {
3926 group = JNIHandles::resolve(args->group);
3927 thread_name = args->name; // may be null
3928 }
3929 if (group == nullptr) group = Universe::main_thread_group();
3930
3931 // Create Java level thread object and attach it to this thread
3932 bool attach_failed = false;
3933 {
3934 EXCEPTION_MARK;
3935 HandleMark hm(THREAD);
3936 Handle thread_group(THREAD, group);
3937 thread->allocate_threadObj(thread_group, thread_name, daemon, THREAD);
3938 if (HAS_PENDING_EXCEPTION) {
3939 CLEAR_PENDING_EXCEPTION;
3940 // cleanup outside the handle mark.
3941 attach_failed = true;
3942 }
3943 }
3944
3945 if (attach_failed) {
3946 // Added missing cleanup
3947 thread->cleanup_failed_attach_current_thread(daemon);
3948 thread->unregister_thread_stack_with_NMT();
3949 thread->smr_delete();
3950 return JNI_ERR;
3951 }
3952
3953 // Update the _monitor_owner_id with the tid value.
3954 thread->set_monitor_owner_id(java_lang_Thread::thread_id(thread->threadObj()));
3955
3956 // Want this inside 'attaching via jni'.
3957 JFR_ONLY(Jfr::on_thread_start(thread);)
3958
3959 // mark the thread as no longer attaching
3960 // this uses a fence to push the change through so we don't have
3961 // to regrab the threads_lock
3962 thread->set_done_attaching_via_jni();
3963
3964 // Set java thread status.
3965 java_lang_Thread::set_thread_status(thread->threadObj(),
3966 JavaThreadStatus::RUNNABLE);
3967
3968 // Notify the debugger
3969 if (JvmtiExport::should_post_thread_life()) {
3970 JvmtiExport::post_thread_start(thread);
3971 }
3972
3973 *(JNIEnv**)penv = thread->jni_environment();
3974
3975 // Now leaving the VM, so change thread_state. This is normally automatically taken care
3976 // of in the JVM_ENTRY. But in this situation we have to do it manually.
3977 ThreadStateTransition::transition_from_vm(thread, _thread_in_native);
3978 MACOS_AARCH64_ONLY(thread->enable_wx(WXExec));
3979
3980 // Perform any platform dependent FPU setup
3981 os::setup_fpu();
3982
3983 return JNI_OK;
3984 }
3985
3986
3987 jint JNICALL jni_AttachCurrentThread(JavaVM *vm, void **penv, void *_args) {
3988 HOTSPOT_JNI_ATTACHCURRENTTHREAD_ENTRY(vm, penv, _args);
3989 if (vm_created == NOT_CREATED) {
3990 // Not sure how we could possibly get here.
3991 HOTSPOT_JNI_ATTACHCURRENTTHREAD_RETURN((uint32_t) JNI_ERR);
3992 return JNI_ERR;
3993 }
3994
3995 jint ret = attach_current_thread(vm, penv, _args, false);
3996 HOTSPOT_JNI_ATTACHCURRENTTHREAD_RETURN(ret);
3997 return ret;
3998 }
3999
4000
4001 jint JNICALL jni_DetachCurrentThread(JavaVM *vm) {
4002 HOTSPOT_JNI_DETACHCURRENTTHREAD_ENTRY(vm);
4003 if (vm_created == NOT_CREATED) {
4004 // Not sure how we could possibly get here.
4005 HOTSPOT_JNI_DETACHCURRENTTHREAD_RETURN(JNI_ERR);
4006 return JNI_ERR;
4007 }
4008
4009 Thread* current = Thread::current_or_null();
4010
4011 // If the thread has already been detached the operation is a no-op
4012 if (current == nullptr) {
4013 HOTSPOT_JNI_DETACHCURRENTTHREAD_RETURN(JNI_OK);
4014 return JNI_OK;
4015 }
4016
4017 // If executing from an atexit hook we may be in the VMThread.
4018 if (!current->is_Java_thread()) {
4019 HOTSPOT_JNI_DETACHCURRENTTHREAD_RETURN((uint32_t) JNI_ERR);
4020 return JNI_ERR;
4021 }
4022
4023 VM_Exit::block_if_vm_exited();
4024
4025 JavaThread* thread = JavaThread::cast(current);
4026 if (thread->has_last_Java_frame()) {
4027 HOTSPOT_JNI_DETACHCURRENTTHREAD_RETURN((uint32_t) JNI_ERR);
4028 // Can't detach a thread that's running java, that can't work.
4029 return JNI_ERR;
4030 }
4031
4032 // We are going to VM, change W^X state to the expected one.
4033 MACOS_AARCH64_ONLY(thread->enable_wx(WXWrite));
4034
4035 // Safepoint support. Have to do call-back to safepoint code, if in the
4036 // middle of a safepoint operation
4037 ThreadStateTransition::transition_from_native(thread, _thread_in_vm);
4038
4039 // XXX: Note that JavaThread::exit() call below removes the guards on the
4040 // stack pages set up via enable_stack_{red,yellow}_zone() calls
4041 // above in jni_AttachCurrentThread. Unfortunately, while the setting
4042 // of the guards is visible in jni_AttachCurrentThread above,
4043 // the removal of the guards is buried below in JavaThread::exit()
4044 // here. The abstraction should be more symmetrically either exposed
4045 // or hidden (e.g. it could probably be hidden in the same
4046 // (platform-dependent) methods where we do alternate stack
4047 // maintenance work?)
4048 thread->exit(false, JavaThread::jni_detach);
4049 thread->unregister_thread_stack_with_NMT();
4050 thread->smr_delete();
4051
4052 // Go to the execute mode, the initial state of the thread on creation.
4053 // Use os interface as the thread is not a JavaThread anymore.
4054 MACOS_AARCH64_ONLY(os::current_thread_enable_wx(WXExec));
4055
4056 HOTSPOT_JNI_DETACHCURRENTTHREAD_RETURN(JNI_OK);
4057 return JNI_OK;
4058 }
4059
4060 DT_RETURN_MARK_DECL(GetEnv, jint
4061 , HOTSPOT_JNI_GETENV_RETURN(_ret_ref));
4062
4063 jint JNICALL jni_GetEnv(JavaVM *vm, void **penv, jint version) {
4064 HOTSPOT_JNI_GETENV_ENTRY(vm, penv, version);
4065 jint ret = JNI_ERR;
4066 DT_RETURN_MARK(GetEnv, jint, (const jint&)ret);
4067
4068 if (vm_created == NOT_CREATED) {
4069 *penv = nullptr;
4070 ret = JNI_EDETACHED;
4071 return ret;
4072 }
4073
4074 if (JniExportedInterface::GetExportedInterface(vm, penv, version, &ret)) {
4075 return ret;
4076 }
4077
4078 #ifndef JVMPI_VERSION_1
4079 // need these in order to be polite about older agents
4080 #define JVMPI_VERSION_1 ((jint)0x10000001)
4081 #define JVMPI_VERSION_1_1 ((jint)0x10000002)
4082 #define JVMPI_VERSION_1_2 ((jint)0x10000003)
4083 #endif // !JVMPI_VERSION_1
4084
4085 Thread* thread = Thread::current_or_null();
4086 if (thread != nullptr && thread->is_Java_thread()) {
4087 if (Threads::is_supported_jni_version_including_1_1(version)) {
4088 *(JNIEnv**)penv = JavaThread::cast(thread)->jni_environment();
4089 ret = JNI_OK;
4090 return ret;
4091
4092 } else if (version == JVMPI_VERSION_1 ||
4093 version == JVMPI_VERSION_1_1 ||
4094 version == JVMPI_VERSION_1_2) {
4095 tty->print_cr("ERROR: JVMPI, an experimental interface, is no longer supported.");
4096 tty->print_cr("Please use the supported interface: the JVM Tool Interface (JVM TI).");
4097 ret = JNI_EVERSION;
4098 return ret;
4099 } else if (JvmtiExport::is_jvmdi_version(version)) {
4100 tty->print_cr("FATAL ERROR: JVMDI is no longer supported.");
4101 tty->print_cr("Please use the supported interface: the JVM Tool Interface (JVM TI).");
4102 ret = JNI_EVERSION;
4103 return ret;
4104 } else {
4105 *penv = nullptr;
4106 ret = JNI_EVERSION;
4107 return ret;
4108 }
4109 } else {
4110 *penv = nullptr;
4111 ret = JNI_EDETACHED;
4112 return ret;
4113 }
4114 }
4115
4116
4117 jint JNICALL jni_AttachCurrentThreadAsDaemon(JavaVM *vm, void **penv, void *_args) {
4118 HOTSPOT_JNI_ATTACHCURRENTTHREADASDAEMON_ENTRY(vm, penv, _args);
4119 if (vm_created == NOT_CREATED) {
4120 // Not sure how we could possibly get here.
4121 HOTSPOT_JNI_ATTACHCURRENTTHREADASDAEMON_RETURN((uint32_t) JNI_ERR);
4122 return JNI_ERR;
4123 }
4124
4125 jint ret = attach_current_thread(vm, penv, _args, true);
4126 HOTSPOT_JNI_ATTACHCURRENTTHREADASDAEMON_RETURN(ret);
4127 return ret;
4128 }
4129
4130
4131 } // End extern "C"
4132
4133 const struct JNIInvokeInterface_ jni_InvokeInterface = {
4134 nullptr,
4135 nullptr,
4136 nullptr,
4137
4138 jni_DestroyJavaVM,
4139 jni_AttachCurrentThread,
4140 jni_DetachCurrentThread,
4141 jni_GetEnv,
4142 jni_AttachCurrentThreadAsDaemon
4143 };