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