1 /*
2 * Copyright (c) 1997, 2021, Oracle and/or its affiliates. All rights reserved.
3 * Copyright (c) 2012 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 "precompiled.hpp"
28 #include "jni.h"
29 #include "jvm.h"
30 #include "ci/ciReplay.hpp"
31 #include "classfile/altHashing.hpp"
32 #include "classfile/classFileStream.hpp"
33 #include "classfile/classLoader.hpp"
34 #include "classfile/classLoadInfo.hpp"
35 #include "classfile/javaClasses.hpp"
36 #include "classfile/javaClasses.inline.hpp"
37 #include "classfile/javaThreadStatus.hpp"
38 #include "classfile/moduleEntry.hpp"
39 #include "classfile/modules.hpp"
40 #include "classfile/symbolTable.hpp"
41 #include "classfile/systemDictionary.hpp"
42 #include "classfile/vmClasses.hpp"
43 #include "classfile/vmSymbols.hpp"
44 #include "compiler/compiler_globals.hpp"
45 #include "gc/shared/collectedHeap.hpp"
46 #include "gc/shared/gcLocker.inline.hpp"
47 #include "gc/shared/stringdedup/stringDedup.hpp"
48 #include "interpreter/linkResolver.hpp"
49 #include "jfr/jfrEvents.hpp"
50 #include "jfr/support/jfrThreadId.hpp"
51 #include "logging/log.hpp"
52 #include "memory/allocation.hpp"
53 #include "memory/allocation.inline.hpp"
54 #include "memory/oopFactory.hpp"
55 #include "memory/resourceArea.hpp"
56 #include "memory/universe.hpp"
57 #include "oops/access.inline.hpp"
58 #include "oops/arrayOop.hpp"
59 #include "oops/instanceKlass.inline.hpp"
60 #include "oops/instanceOop.hpp"
61 #include "oops/klass.inline.hpp"
62 #include "oops/markWord.hpp"
63 #include "oops/method.hpp"
64 #include "oops/objArrayKlass.hpp"
65 #include "oops/objArrayOop.inline.hpp"
66 #include "oops/oop.inline.hpp"
67 #include "oops/symbol.hpp"
68 #include "oops/typeArrayKlass.hpp"
69 #include "oops/typeArrayOop.inline.hpp"
70 #include "prims/jniCheck.hpp"
71 #include "prims/jniExport.hpp"
72 #include "prims/jniFastGetField.hpp"
73 #include "prims/jvm_misc.hpp"
74 #include "prims/jvmtiExport.hpp"
75 #include "prims/jvmtiThreadState.hpp"
76 #include "runtime/atomic.hpp"
77 #include "runtime/fieldDescriptor.inline.hpp"
78 #include "runtime/handles.inline.hpp"
79 #include "runtime/interfaceSupport.inline.hpp"
80 #include "runtime/java.hpp"
81 #include "runtime/javaCalls.hpp"
82 #include "runtime/jfieldIDWorkaround.hpp"
83 #include "runtime/jniHandles.inline.hpp"
84 #include "runtime/reflection.hpp"
85 #include "runtime/safepointVerifiers.hpp"
86 #include "runtime/sharedRuntime.hpp"
87 #include "runtime/signature.hpp"
88 #include "runtime/thread.inline.hpp"
89 #include "runtime/vmOperations.hpp"
90 #include "services/memTracker.hpp"
91 #include "services/runtimeService.hpp"
92 #include "utilities/defaultStream.hpp"
93 #include "utilities/dtrace.hpp"
94 #include "utilities/events.hpp"
95 #include "utilities/macros.hpp"
96 #include "utilities/vmError.hpp"
97 #if INCLUDE_JVMCI
98 #include "jvmci/jvmciCompiler.hpp"
99 #endif
100
101 static jint CurrentVersion = JNI_VERSION_10;
102
103 #if defined(_WIN32) && !defined(USE_VECTORED_EXCEPTION_HANDLING)
104 extern LONG WINAPI topLevelExceptionFilter(_EXCEPTION_POINTERS* );
105 #endif
106
107 // The DT_RETURN_MARK macros create a scoped object to fire the dtrace
108 // '-return' probe regardless of the return path is taken out of the function.
109 // Methods that have multiple return paths use this to avoid having to
110 // instrument each return path. Methods that use CHECK or THROW must use this
111 // since those macros can cause an immedate uninstrumented return.
112 //
113 // In order to get the return value, a reference to the variable containing
114 // the return value must be passed to the contructor of the object, and
115 // the return value must be set before return (since the mark object has
116 // a reference to it).
117 //
118 // Example:
119 // DT_RETURN_MARK_DECL(SomeFunc, int);
120 // JNI_ENTRY(int, SomeFunc, ...)
121 // int return_value = 0;
122 // DT_RETURN_MARK(SomeFunc, int, (const int&)return_value);
123 // foo(CHECK_0)
124 // return_value = 5;
125 // return return_value;
126 // JNI_END
127 #define DT_RETURN_MARK_DECL(name, type, probe) \
128 DTRACE_ONLY( \
129 class DTraceReturnProbeMark_##name { \
130 public: \
131 const type& _ret_ref; \
132 DTraceReturnProbeMark_##name(const type& v) : _ret_ref(v) {} \
133 ~DTraceReturnProbeMark_##name() { \
134 probe; \
135 } \
136 } \
137 )
138 // Void functions are simpler since there's no return value
139 #define DT_VOID_RETURN_MARK_DECL(name, probe) \
140 DTRACE_ONLY( \
141 class DTraceReturnProbeMark_##name { \
142 public: \
143 ~DTraceReturnProbeMark_##name() { \
144 probe; \
145 } \
146 } \
147 )
148
149 // Place these macros in the function to mark the return. Non-void
150 // functions need the type and address of the return value.
151 #define DT_RETURN_MARK(name, type, ref) \
152 DTRACE_ONLY( DTraceReturnProbeMark_##name dtrace_return_mark(ref) )
153 #define DT_VOID_RETURN_MARK(name) \
154 DTRACE_ONLY( DTraceReturnProbeMark_##name dtrace_return_mark )
155
156
157 // Use these to select distinct code for floating-point vs. non-floating point
158 // situations. Used from within common macros where we need slightly
159 // different behavior for Float/Double
160 #define FP_SELECT_Boolean(intcode, fpcode) intcode
161 #define FP_SELECT_Byte(intcode, fpcode) intcode
162 #define FP_SELECT_Char(intcode, fpcode) intcode
163 #define FP_SELECT_Short(intcode, fpcode) intcode
164 #define FP_SELECT_Object(intcode, fpcode) intcode
165 #define FP_SELECT_Int(intcode, fpcode) intcode
166 #define FP_SELECT_Long(intcode, fpcode) intcode
167 #define FP_SELECT_Float(intcode, fpcode) fpcode
168 #define FP_SELECT_Double(intcode, fpcode) fpcode
169 #define FP_SELECT(TypeName, intcode, fpcode) \
170 FP_SELECT_##TypeName(intcode, fpcode)
171
172 // Choose DT_RETURN_MARK macros based on the type: float/double -> void
173 // (dtrace doesn't do FP yet)
174 #define DT_RETURN_MARK_DECL_FOR(TypeName, name, type, probe) \
175 FP_SELECT(TypeName, \
176 DT_RETURN_MARK_DECL(name, type, probe), DT_VOID_RETURN_MARK_DECL(name, probe) )
177 #define DT_RETURN_MARK_FOR(TypeName, name, type, ref) \
178 FP_SELECT(TypeName, \
179 DT_RETURN_MARK(name, type, ref), DT_VOID_RETURN_MARK(name) )
180
181
182 // out-of-line helpers for class jfieldIDWorkaround:
183
is_valid_jfieldID(Klass * k,jfieldID id)184 bool jfieldIDWorkaround::is_valid_jfieldID(Klass* k, jfieldID id) {
185 if (jfieldIDWorkaround::is_instance_jfieldID(k, id)) {
186 uintptr_t as_uint = (uintptr_t) id;
187 intptr_t offset = raw_instance_offset(id);
188 if (is_checked_jfieldID(id)) {
189 if (!klass_hash_ok(k, id)) {
190 return false;
191 }
192 }
193 return InstanceKlass::cast(k)->contains_field_offset(offset);
194 } else {
195 JNIid* result = (JNIid*) id;
196 #ifdef ASSERT
197 return result != NULL && result->is_static_field_id();
198 #else
199 return result != NULL;
200 #endif
201 }
202 }
203
204
encode_klass_hash(Klass * k,intptr_t offset)205 intptr_t jfieldIDWorkaround::encode_klass_hash(Klass* k, intptr_t offset) {
206 if (offset <= small_offset_mask) {
207 Klass* field_klass = k;
208 Klass* super_klass = field_klass->super();
209 // With compressed oops the most super class with nonstatic fields would
210 // be the owner of fields embedded in the header.
211 while (InstanceKlass::cast(super_klass)->has_nonstatic_fields() &&
212 InstanceKlass::cast(super_klass)->contains_field_offset(offset)) {
213 field_klass = super_klass; // super contains the field also
214 super_klass = field_klass->super();
215 }
216 debug_only(NoSafepointVerifier nosafepoint;)
217 uintptr_t klass_hash = field_klass->identity_hash();
218 return ((klass_hash & klass_mask) << klass_shift) | checked_mask_in_place;
219 } else {
220 #if 0
221 #ifndef PRODUCT
222 {
223 ResourceMark rm;
224 warning("VerifyJNIFields: long offset %d in %s", offset, k->external_name());
225 }
226 #endif
227 #endif
228 return 0;
229 }
230 }
231
klass_hash_ok(Klass * k,jfieldID id)232 bool jfieldIDWorkaround::klass_hash_ok(Klass* k, jfieldID id) {
233 uintptr_t as_uint = (uintptr_t) id;
234 intptr_t klass_hash = (as_uint >> klass_shift) & klass_mask;
235 do {
236 debug_only(NoSafepointVerifier nosafepoint;)
237 // Could use a non-blocking query for identity_hash here...
238 if ((k->identity_hash() & klass_mask) == klass_hash)
239 return true;
240 k = k->super();
241 } while (k != NULL);
242 return false;
243 }
244
verify_instance_jfieldID(Klass * k,jfieldID id)245 void jfieldIDWorkaround::verify_instance_jfieldID(Klass* k, jfieldID id) {
246 guarantee(jfieldIDWorkaround::is_instance_jfieldID(k, id), "must be an instance field" );
247 uintptr_t as_uint = (uintptr_t) id;
248 intptr_t offset = raw_instance_offset(id);
249 if (VerifyJNIFields) {
250 if (is_checked_jfieldID(id)) {
251 guarantee(klass_hash_ok(k, id),
252 "Bug in native code: jfieldID class must match object");
253 } else {
254 #if 0
255 #ifndef PRODUCT
256 if (Verbose) {
257 ResourceMark rm;
258 warning("VerifyJNIFields: unverified offset %d for %s", offset, k->external_name());
259 }
260 #endif
261 #endif
262 }
263 }
264 guarantee(InstanceKlass::cast(k)->contains_field_offset(offset),
265 "Bug in native code: jfieldID offset must address interior of object");
266 }
267
268 // Implementation of JNI entries
269
270 DT_RETURN_MARK_DECL(DefineClass, jclass
271 , HOTSPOT_JNI_DEFINECLASS_RETURN(_ret_ref));
272
273 JNI_ENTRY(jclass, jni_DefineClass(JNIEnv *env, const char *name, jobject loaderRef,
274 const jbyte *buf, jsize bufLen))
275 HOTSPOT_JNI_DEFINECLASS_ENTRY(
276 env, (char*) name, loaderRef, (char*) buf, bufLen);
277
278 jclass cls = NULL;
279 DT_RETURN_MARK(DefineClass, jclass, (const jclass&)cls);
280
281 // Class resolution will get the class name from the .class stream if the name is null.
282 TempNewSymbol class_name = name == NULL ? NULL :
283 SystemDictionary::class_name_symbol(name, vmSymbols::java_lang_NoClassDefFoundError(),
284 CHECK_NULL);
285
286 ResourceMark rm(THREAD);
287 ClassFileStream st((u1*)buf, bufLen, NULL, ClassFileStream::verify);
288 Handle class_loader (THREAD, JNIHandles::resolve(loaderRef));
289 Handle protection_domain;
290 ClassLoadInfo cl_info(protection_domain);
291 Klass* k = SystemDictionary::resolve_from_stream(&st, class_name,
292 class_loader,
293 cl_info,
294 CHECK_NULL);
295
296 if (log_is_enabled(Debug, class, resolve)) {
297 trace_class_resolution(k);
298 }
299
300 cls = (jclass)JNIHandles::make_local(THREAD, k->java_mirror());
301 return cls;
302 JNI_END
303
304
305
306 DT_RETURN_MARK_DECL(FindClass, jclass
307 , HOTSPOT_JNI_FINDCLASS_RETURN(_ret_ref));
308
309 JNI_ENTRY(jclass, jni_FindClass(JNIEnv *env, const char *name))
310 HOTSPOT_JNI_FINDCLASS_ENTRY(env, (char *)name);
311
312 jclass result = NULL;
313 DT_RETURN_MARK(FindClass, jclass, (const jclass&)result);
314
315 // This should be ClassNotFoundException imo.
316 TempNewSymbol class_name =
317 SystemDictionary::class_name_symbol(name, vmSymbols::java_lang_NoClassDefFoundError(),
318 CHECK_NULL);
319
320 //%note jni_3
321 Handle protection_domain;
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 != NULL) {
327 // Special handling to make sure JNI_OnLoad and JNI_OnUnload are executed
328 // in the correct class context.
329 if (k->class_loader() == NULL &&
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 != NULL) {
341 Klass* fromClass = java_lang_Class::as_Klass(mirror);
342 loader = Handle(THREAD, fromClass->class_loader());
343 protection_domain = Handle(THREAD, fromClass->protection_domain());
344 }
345 } else {
346 loader = Handle(THREAD, k->class_loader());
347 }
348 }
349
350 result = find_class_from_class_loader(env, class_name, true, loader,
351 protection_domain, true, thread);
352
353 if (log_is_enabled(Debug, class, resolve) && result != NULL) {
354 trace_class_resolution(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(result)));
355 }
356
357 return result;
358 JNI_END
359
360 DT_RETURN_MARK_DECL(FromReflectedMethod, jmethodID
361 , HOTSPOT_JNI_FROMREFLECTEDMETHOD_RETURN((uintptr_t)_ret_ref));
362
363 JNI_ENTRY(jmethodID, jni_FromReflectedMethod(JNIEnv *env, jobject method))
364 HOTSPOT_JNI_FROMREFLECTEDMETHOD_ENTRY(env, method);
365
366 jmethodID ret = NULL;
367 DT_RETURN_MARK(FromReflectedMethod, jmethodID, (const jmethodID&)ret);
368
369 // method is a handle to a java.lang.reflect.Method object
370 oop reflected = JNIHandles::resolve_non_null(method);
371 oop mirror = NULL;
372 int slot = 0;
373
374 if (reflected->klass() == vmClasses::reflect_Constructor_klass()) {
375 mirror = java_lang_reflect_Constructor::clazz(reflected);
376 slot = java_lang_reflect_Constructor::slot(reflected);
377 } else {
378 assert(reflected->klass() == vmClasses::reflect_Method_klass(), "wrong type");
379 mirror = java_lang_reflect_Method::clazz(reflected);
380 slot = java_lang_reflect_Method::slot(reflected);
381 }
382 Klass* k1 = java_lang_Class::as_Klass(mirror);
383
384 // Make sure class is initialized before handing id's out to methods
385 k1->initialize(CHECK_NULL);
386 Method* m = InstanceKlass::cast(k1)->method_with_idnum(slot);
387 ret = m==NULL? NULL : m->jmethod_id(); // return NULL if reflected method deleted
388 return ret;
389 JNI_END
390
391 DT_RETURN_MARK_DECL(FromReflectedField, jfieldID
392 , HOTSPOT_JNI_FROMREFLECTEDFIELD_RETURN((uintptr_t)_ret_ref));
393
394 JNI_ENTRY(jfieldID, jni_FromReflectedField(JNIEnv *env, jobject field))
395 HOTSPOT_JNI_FROMREFLECTEDFIELD_ENTRY(env, field);
396
397 jfieldID ret = NULL;
398 DT_RETURN_MARK(FromReflectedField, jfieldID, (const jfieldID&)ret);
399
400 // field is a handle to a java.lang.reflect.Field object
401 oop reflected = JNIHandles::resolve_non_null(field);
402 oop mirror = java_lang_reflect_Field::clazz(reflected);
403 Klass* k1 = java_lang_Class::as_Klass(mirror);
404 int slot = java_lang_reflect_Field::slot(reflected);
405 int modifiers = java_lang_reflect_Field::modifiers(reflected);
406
407 // Make sure class is initialized before handing id's out to fields
408 k1->initialize(CHECK_NULL);
409
410 // First check if this is a static field
411 if (modifiers & JVM_ACC_STATIC) {
412 intptr_t offset = InstanceKlass::cast(k1)->field_offset( slot );
413 JNIid* id = InstanceKlass::cast(k1)->jni_id_for(offset);
414 assert(id != NULL, "corrupt Field object");
415 debug_only(id->set_is_static_field_id();)
416 // A jfieldID for a static field is a JNIid specifying the field holder and the offset within the Klass*
417 ret = jfieldIDWorkaround::to_static_jfieldID(id);
418 return ret;
419 }
420
421 // The slot is the index of the field description in the field-array
422 // The jfieldID is the offset of the field within the object
423 // It may also have hash bits for k, if VerifyJNIFields is turned on.
424 intptr_t offset = InstanceKlass::cast(k1)->field_offset( slot );
425 assert(InstanceKlass::cast(k1)->contains_field_offset(offset), "stay within object");
426 ret = jfieldIDWorkaround::to_instance_jfieldID(k1, offset);
427 return ret;
428 JNI_END
429
430
431 DT_RETURN_MARK_DECL(ToReflectedMethod, jobject
432 , HOTSPOT_JNI_TOREFLECTEDMETHOD_RETURN(_ret_ref));
433
434 JNI_ENTRY(jobject, jni_ToReflectedMethod(JNIEnv *env, jclass cls, jmethodID method_id, jboolean isStatic))
435 HOTSPOT_JNI_TOREFLECTEDMETHOD_ENTRY(env, cls, (uintptr_t) method_id, isStatic);
436
437 jobject ret = NULL;
438 DT_RETURN_MARK(ToReflectedMethod, jobject, (const jobject&)ret);
439
440 methodHandle m (THREAD, Method::resolve_jmethod_id(method_id));
441 assert(m->is_static() == (isStatic != 0), "jni_ToReflectedMethod access flags doesn't match");
442 oop reflection_method;
443 if (m->is_initializer()) {
444 reflection_method = Reflection::new_constructor(m, CHECK_NULL);
445 } else {
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 = NULL;
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 NULL;
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 NULL;
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 == NULL) ? NULL : (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 != NULL && super_klass != NULL, "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 Handle protection_domain (THREAD, k->protection_domain());
535 THROW_MSG_LOADER_(name, (char *)message, class_loader, protection_domain, JNI_OK);
536 ShouldNotReachHere();
537 return 0; // Mute compiler.
538 JNI_END
539
540
541 // JNI functions only transform a pending async exception to a synchronous
542 // exception in ExceptionOccurred and ExceptionCheck calls, since
543 // delivering an async exception in other places won't change the native
544 // code's control flow and would be harmful when native code further calls
545 // JNI functions with a pending exception. Async exception is also checked
546 // during the call, so ExceptionOccurred/ExceptionCheck won't return
547 // false but deliver the async exception at the very end during
548 // state transition.
549
jni_check_async_exceptions(JavaThread * thread)550 static void jni_check_async_exceptions(JavaThread *thread) {
551 assert(thread == Thread::current(), "must be itself");
552 thread->check_and_handle_async_exceptions();
553 }
554
555 JNI_ENTRY_NO_PRESERVE(jthrowable, jni_ExceptionOccurred(JNIEnv *env))
556 HOTSPOT_JNI_EXCEPTIONOCCURRED_ENTRY(env);
557
558 jni_check_async_exceptions(thread);
559 oop exception = thread->pending_exception();
560 jthrowable ret = (jthrowable) JNIHandles::make_local(THREAD, exception);
561
562 HOTSPOT_JNI_EXCEPTIONOCCURRED_RETURN(ret);
563 return ret;
564 JNI_END
565
566
567 JNI_ENTRY_NO_PRESERVE(void, jni_ExceptionDescribe(JNIEnv *env))
568 HOTSPOT_JNI_EXCEPTIONDESCRIBE_ENTRY(env);
569
570 if (thread->has_pending_exception()) {
571 Handle ex(thread, thread->pending_exception());
572 thread->clear_pending_exception();
573 if (ex->is_a(vmClasses::ThreadDeath_klass())) {
574 // Don't print anything if we are being killed.
575 } else {
576 jio_fprintf(defaultStream::error_stream(), "Exception ");
577 if (thread != NULL && thread->threadObj() != NULL) {
578 ResourceMark rm(THREAD);
579 jio_fprintf(defaultStream::error_stream(),
580 "in thread \"%s\" ", thread->get_thread_name());
581 }
582 if (ex->is_a(vmClasses::Throwable_klass())) {
583 JavaValue result(T_VOID);
584 JavaCalls::call_virtual(&result,
585 ex,
586 vmClasses::Throwable_klass(),
587 vmSymbols::printStackTrace_name(),
588 vmSymbols::void_method_signature(),
589 THREAD);
590 // If an exception is thrown in the call it gets thrown away. Not much
591 // we can do with it. The native code that calls this, does not check
592 // for the exception - hence, it might still be in the thread when DestroyVM gets
593 // called, potentially causing a few asserts to trigger - since no pending exception
594 // is expected.
595 CLEAR_PENDING_EXCEPTION;
596 } else {
597 ResourceMark rm(THREAD);
598 jio_fprintf(defaultStream::error_stream(),
599 ". Uncaught exception of type %s.",
600 ex->klass()->external_name());
601 }
602 }
603 }
604
605 HOTSPOT_JNI_EXCEPTIONDESCRIBE_RETURN();
606 JNI_END
607
608
609 JNI_ENTRY_NO_PRESERVE(void, jni_ExceptionClear(JNIEnv *env))
610 HOTSPOT_JNI_EXCEPTIONCLEAR_ENTRY(env);
611
612 // The jni code might be using this API to clear java thrown exception.
613 // So just mark jvmti thread exception state as exception caught.
614 JvmtiThreadState *state = JavaThread::current()->jvmti_thread_state();
615 if (state != NULL && state->is_exception_detected()) {
616 state->set_exception_caught();
617 }
618 thread->clear_pending_exception();
619
620 HOTSPOT_JNI_EXCEPTIONCLEAR_RETURN();
621 JNI_END
622
623
624 JNI_ENTRY(void, jni_FatalError(JNIEnv *env, const char *msg))
625 HOTSPOT_JNI_FATALERROR_ENTRY(env, (char *) msg);
626
627 tty->print_cr("FATAL ERROR in native method: %s", msg);
628 thread->print_stack();
629 os::abort(); // Dump core and abort
630 JNI_END
631
632
633 JNI_ENTRY(jint, jni_PushLocalFrame(JNIEnv *env, jint capacity))
634 HOTSPOT_JNI_PUSHLOCALFRAME_ENTRY(env, capacity);
635
636 //%note jni_11
637 if (capacity < 0 ||
638 ((MaxJNILocalCapacity > 0) && (capacity > MaxJNILocalCapacity))) {
639 HOTSPOT_JNI_PUSHLOCALFRAME_RETURN((uint32_t)JNI_ERR);
640 return JNI_ERR;
641 }
642 JNIHandleBlock* old_handles = thread->active_handles();
643 JNIHandleBlock* new_handles = JNIHandleBlock::allocate_block(thread);
644 assert(new_handles != NULL, "should not be NULL");
645 new_handles->set_pop_frame_link(old_handles);
646 thread->set_active_handles(new_handles);
647 jint ret = JNI_OK;
648 HOTSPOT_JNI_PUSHLOCALFRAME_RETURN(ret);
649 return ret;
650 JNI_END
651
652
653 JNI_ENTRY(jobject, jni_PopLocalFrame(JNIEnv *env, jobject result))
654 HOTSPOT_JNI_POPLOCALFRAME_ENTRY(env, result);
655
656 //%note jni_11
657 Handle result_handle(thread, JNIHandles::resolve(result));
658 JNIHandleBlock* old_handles = thread->active_handles();
659 JNIHandleBlock* new_handles = old_handles->pop_frame_link();
660 if (new_handles != NULL) {
661 // As a sanity check we only release the handle blocks if the pop_frame_link is not NULL.
662 // This way code will still work if PopLocalFrame is called without a corresponding
663 // PushLocalFrame call. Note that we set the pop_frame_link to NULL explicitly, otherwise
664 // the release_block call will release the blocks.
665 thread->set_active_handles(new_handles);
666 old_handles->set_pop_frame_link(NULL); // clear link we won't release new_handles below
667 JNIHandleBlock::release_block(old_handles, thread); // may block
668 result = JNIHandles::make_local(thread, result_handle());
669 }
670 HOTSPOT_JNI_POPLOCALFRAME_RETURN(result);
671 return result;
672 JNI_END
673
674
675 JNI_ENTRY(jobject, jni_NewGlobalRef(JNIEnv *env, jobject ref))
676 HOTSPOT_JNI_NEWGLOBALREF_ENTRY(env, ref);
677
678 Handle ref_handle(thread, JNIHandles::resolve(ref));
679 jobject ret = JNIHandles::make_global(ref_handle, AllocFailStrategy::RETURN_NULL);
680
681 HOTSPOT_JNI_NEWGLOBALREF_RETURN(ret);
682 return ret;
683 JNI_END
684
685 // Must be JNI_ENTRY (with HandleMark)
686 JNI_ENTRY_NO_PRESERVE(void, jni_DeleteGlobalRef(JNIEnv *env, jobject ref))
687 HOTSPOT_JNI_DELETEGLOBALREF_ENTRY(env, ref);
688
689 JNIHandles::destroy_global(ref);
690
691 HOTSPOT_JNI_DELETEGLOBALREF_RETURN();
692 JNI_END
693
694 JNI_ENTRY_NO_PRESERVE(void, jni_DeleteLocalRef(JNIEnv *env, jobject obj))
695 HOTSPOT_JNI_DELETELOCALREF_ENTRY(env, obj);
696
697 JNIHandles::destroy_local(obj);
698
699 HOTSPOT_JNI_DELETELOCALREF_RETURN();
700 JNI_END
701
702 JNI_ENTRY_NO_PRESERVE(jboolean, jni_IsSameObject(JNIEnv *env, jobject r1, jobject r2))
703 HOTSPOT_JNI_ISSAMEOBJECT_ENTRY(env, r1, r2);
704
705 jboolean ret = JNIHandles::is_same_object(r1, r2) ? JNI_TRUE : JNI_FALSE;
706
707 HOTSPOT_JNI_ISSAMEOBJECT_RETURN(ret);
708 return ret;
709 JNI_END
710
711
712 JNI_ENTRY(jobject, jni_NewLocalRef(JNIEnv *env, jobject ref))
713 HOTSPOT_JNI_NEWLOCALREF_ENTRY(env, ref);
714
715 jobject ret = JNIHandles::make_local(THREAD, JNIHandles::resolve(ref),
716 AllocFailStrategy::RETURN_NULL);
717
718 HOTSPOT_JNI_NEWLOCALREF_RETURN(ret);
719 return ret;
720 JNI_END
721
722 JNI_LEAF(jint, jni_EnsureLocalCapacity(JNIEnv *env, jint capacity))
723 HOTSPOT_JNI_ENSURELOCALCAPACITY_ENTRY(env, capacity);
724
725 jint ret;
726 if (capacity >= 0 &&
727 ((MaxJNILocalCapacity <= 0) || (capacity <= MaxJNILocalCapacity))) {
728 ret = JNI_OK;
729 } else {
730 ret = JNI_ERR;
731 }
732
733 HOTSPOT_JNI_ENSURELOCALCAPACITY_RETURN(ret);
734 return ret;
735 JNI_END
736
737 // Return the Handle Type
738 JNI_LEAF(jobjectRefType, jni_GetObjectRefType(JNIEnv *env, jobject obj))
739 HOTSPOT_JNI_GETOBJECTREFTYPE_ENTRY(env, obj);
740
741 jobjectRefType ret = JNIInvalidRefType;
742 if (obj != NULL) {
743 ret = JNIHandles::handle_type(thread, obj);
744 }
745
746 HOTSPOT_JNI_GETOBJECTREFTYPE_RETURN((void *) ret);
747 return ret;
748 JNI_END
749
750
751 class JNI_ArgumentPusher : public SignatureIterator {
752 protected:
753 JavaCallArguments* _arguments;
754
push_int(jint x)755 void push_int(jint x) { _arguments->push_int(x); }
push_long(jlong x)756 void push_long(jlong x) { _arguments->push_long(x); }
push_float(jfloat x)757 void push_float(jfloat x) { _arguments->push_float(x); }
push_double(jdouble x)758 void push_double(jdouble x) { _arguments->push_double(x); }
push_object(jobject x)759 void push_object(jobject x) { _arguments->push_jobject(x); }
760
push_boolean(jboolean b)761 void push_boolean(jboolean b) {
762 // Normalize boolean arguments from native code by converting 1-255 to JNI_TRUE and
763 // 0 to JNI_FALSE. Boolean return values from native are normalized the same in
764 // TemplateInterpreterGenerator::generate_result_handler_for and
765 // SharedRuntime::generate_native_wrapper.
766 push_int(b == 0 ? JNI_FALSE : JNI_TRUE);
767 }
768
JNI_ArgumentPusher(Method * method)769 JNI_ArgumentPusher(Method* method)
770 : SignatureIterator(method->signature(),
771 Fingerprinter(methodHandle(Thread::current(), method)).fingerprint())
772 {
773 _arguments = NULL;
774 }
775
776 public:
777 virtual void push_arguments_on(JavaCallArguments* arguments) = 0;
778 };
779
780
781 class JNI_ArgumentPusherVaArg : public JNI_ArgumentPusher {
782 va_list _ap;
783
set_ap(va_list rap)784 void set_ap(va_list rap) {
785 va_copy(_ap, rap);
786 }
787
788 friend class SignatureIterator; // so do_parameters_on can call do_type
do_type(BasicType type)789 void do_type(BasicType type) {
790 switch (type) {
791 // these are coerced to int when using va_arg
792 case T_BYTE:
793 case T_CHAR:
794 case T_SHORT:
795 case T_INT: push_int(va_arg(_ap, jint)); break;
796 case T_BOOLEAN: push_boolean((jboolean) va_arg(_ap, jint)); break;
797
798 // each of these paths is exercised by the various jck Call[Static,Nonvirtual,][Void,Int,..]Method[A,V,] tests
799
800 case T_LONG: push_long(va_arg(_ap, jlong)); break;
801 // float is coerced to double w/ va_arg
802 case T_FLOAT: push_float((jfloat) va_arg(_ap, jdouble)); break;
803 case T_DOUBLE: push_double(va_arg(_ap, jdouble)); break;
804
805 case T_ARRAY:
806 case T_OBJECT: push_object(va_arg(_ap, jobject)); break;
807 default: ShouldNotReachHere();
808 }
809 }
810
811 public:
JNI_ArgumentPusherVaArg(jmethodID method_id,va_list rap)812 JNI_ArgumentPusherVaArg(jmethodID method_id, va_list rap)
813 : JNI_ArgumentPusher(Method::resolve_jmethod_id(method_id)) {
814 set_ap(rap);
815 }
816
~JNI_ArgumentPusherVaArg()817 ~JNI_ArgumentPusherVaArg() {
818 va_end(_ap);
819 }
820
push_arguments_on(JavaCallArguments * arguments)821 virtual void push_arguments_on(JavaCallArguments* arguments) {
822 _arguments = arguments;
823 do_parameters_on(this);
824 }
825 };
826
827
828 class JNI_ArgumentPusherArray : public JNI_ArgumentPusher {
829 protected:
830 const jvalue *_ap;
831
set_ap(const jvalue * rap)832 inline void set_ap(const jvalue *rap) { _ap = rap; }
833
834 friend class SignatureIterator; // so do_parameters_on can call do_type
do_type(BasicType type)835 void do_type(BasicType type) {
836 switch (type) {
837 case T_CHAR: push_int((_ap++)->c); break;
838 case T_SHORT: push_int((_ap++)->s); break;
839 case T_BYTE: push_int((_ap++)->b); break;
840 case T_INT: push_int((_ap++)->i); break;
841 case T_BOOLEAN: push_boolean((_ap++)->z); break;
842 case T_LONG: push_long((_ap++)->j); break;
843 case T_FLOAT: push_float((_ap++)->f); break;
844 case T_DOUBLE: push_double((_ap++)->d); break;
845 case T_ARRAY:
846 case T_OBJECT: push_object((_ap++)->l); break;
847 default: ShouldNotReachHere();
848 }
849 }
850
851 public:
JNI_ArgumentPusherArray(jmethodID method_id,const jvalue * rap)852 JNI_ArgumentPusherArray(jmethodID method_id, const jvalue *rap)
853 : JNI_ArgumentPusher(Method::resolve_jmethod_id(method_id)) {
854 set_ap(rap);
855 }
856
push_arguments_on(JavaCallArguments * arguments)857 virtual void push_arguments_on(JavaCallArguments* arguments) {
858 _arguments = arguments;
859 do_parameters_on(this);
860 }
861 };
862
863
864 enum JNICallType {
865 JNI_STATIC,
866 JNI_VIRTUAL,
867 JNI_NONVIRTUAL
868 };
869
870
871
jni_invoke_static(JNIEnv * env,JavaValue * result,jobject receiver,JNICallType call_type,jmethodID method_id,JNI_ArgumentPusher * args,TRAPS)872 static void jni_invoke_static(JNIEnv *env, JavaValue* result, jobject receiver, JNICallType call_type, jmethodID method_id, JNI_ArgumentPusher *args, TRAPS) {
873 methodHandle method(THREAD, Method::resolve_jmethod_id(method_id));
874
875 // Create object to hold arguments for the JavaCall, and associate it with
876 // the jni parser
877 ResourceMark rm(THREAD);
878 int number_of_parameters = method->size_of_parameters();
879 JavaCallArguments java_args(number_of_parameters);
880
881 assert(method->is_static(), "method should be static");
882
883 // Fill out JavaCallArguments object
884 args->push_arguments_on(&java_args);
885 // Initialize result type
886 result->set_type(args->return_type());
887
888 // Invoke the method. Result is returned as oop.
889 JavaCalls::call(result, method, &java_args, CHECK);
890
891 // Convert result
892 if (is_reference_type(result->get_type())) {
893 result->set_jobject(JNIHandles::make_local(THREAD, result->get_oop()));
894 }
895 }
896
897
jni_invoke_nonstatic(JNIEnv * env,JavaValue * result,jobject receiver,JNICallType call_type,jmethodID method_id,JNI_ArgumentPusher * args,TRAPS)898 static void jni_invoke_nonstatic(JNIEnv *env, JavaValue* result, jobject receiver, JNICallType call_type, jmethodID method_id, JNI_ArgumentPusher *args, TRAPS) {
899 oop recv = JNIHandles::resolve(receiver);
900 if (recv == NULL) {
901 THROW(vmSymbols::java_lang_NullPointerException());
902 }
903 Handle h_recv(THREAD, recv);
904
905 int number_of_parameters;
906 Method* selected_method;
907 {
908 Method* m = Method::resolve_jmethod_id(method_id);
909 number_of_parameters = m->size_of_parameters();
910 InstanceKlass* holder = m->method_holder();
911 if (call_type != JNI_VIRTUAL) {
912 selected_method = m;
913 } else if (!m->has_itable_index()) {
914 // non-interface call -- for that little speed boost, don't handlize
915 debug_only(NoSafepointVerifier nosafepoint;)
916 // jni_GetMethodID makes sure class is linked and initialized
917 // so m should have a valid vtable index.
918 assert(m->valid_vtable_index(), "no valid vtable index");
919 int vtbl_index = m->vtable_index();
920 if (vtbl_index != Method::nonvirtual_vtable_index) {
921 selected_method = h_recv->klass()->method_at_vtable(vtbl_index);
922 } else {
923 // final method
924 selected_method = m;
925 }
926 } else {
927 // interface call
928 int itbl_index = m->itable_index();
929 Klass* k = h_recv->klass();
930 selected_method = InstanceKlass::cast(k)->method_at_itable(holder, itbl_index, CHECK);
931 }
932 }
933
934 methodHandle method(THREAD, selected_method);
935
936 // Create object to hold arguments for the JavaCall, and associate it with
937 // the jni parser
938 ResourceMark rm(THREAD);
939 JavaCallArguments java_args(number_of_parameters);
940
941 // handle arguments
942 assert(!method->is_static(), "method %s should not be static", method->name_and_sig_as_C_string());
943 java_args.push_oop(h_recv); // Push jobject handle
944
945 // Fill out JavaCallArguments object
946 args->push_arguments_on(&java_args);
947 // Initialize result type
948 result->set_type(args->return_type());
949
950 // Invoke the method. Result is returned as oop.
951 JavaCalls::call(result, method, &java_args, CHECK);
952
953 // Convert result
954 if (is_reference_type(result->get_type())) {
955 result->set_jobject(JNIHandles::make_local(THREAD, result->get_oop()));
956 }
957 }
958
959 DT_RETURN_MARK_DECL(AllocObject, jobject
960 , HOTSPOT_JNI_ALLOCOBJECT_RETURN(_ret_ref));
961
962 JNI_ENTRY(jobject, jni_AllocObject(JNIEnv *env, jclass clazz))
963 HOTSPOT_JNI_ALLOCOBJECT_ENTRY(env, clazz);
964
965 jobject ret = NULL;
966 DT_RETURN_MARK(AllocObject, jobject, (const jobject&)ret);
967
968 instanceOop i = InstanceKlass::allocate_instance(JNIHandles::resolve_non_null(clazz), CHECK_NULL);
969 ret = JNIHandles::make_local(THREAD, i);
970 return ret;
971 JNI_END
972
973 DT_RETURN_MARK_DECL(NewObjectA, jobject
974 , HOTSPOT_JNI_NEWOBJECTA_RETURN(_ret_ref));
975
976 JNI_ENTRY(jobject, jni_NewObjectA(JNIEnv *env, jclass clazz, jmethodID methodID, const jvalue *args))
977 HOTSPOT_JNI_NEWOBJECTA_ENTRY(env, clazz, (uintptr_t) methodID);
978
979 jobject obj = NULL;
980 DT_RETURN_MARK(NewObjectA, jobject, (const jobject&)obj);
981
982 instanceOop i = InstanceKlass::allocate_instance(JNIHandles::resolve_non_null(clazz), CHECK_NULL);
983 obj = JNIHandles::make_local(THREAD, i);
984 JavaValue jvalue(T_VOID);
985 JNI_ArgumentPusherArray ap(methodID, args);
986 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_NULL);
987 return obj;
988 JNI_END
989
990
991 DT_RETURN_MARK_DECL(NewObjectV, jobject
992 , HOTSPOT_JNI_NEWOBJECTV_RETURN(_ret_ref));
993
994 JNI_ENTRY(jobject, jni_NewObjectV(JNIEnv *env, jclass clazz, jmethodID methodID, va_list args))
995 HOTSPOT_JNI_NEWOBJECTV_ENTRY(env, clazz, (uintptr_t) methodID);
996
997 jobject obj = NULL;
998 DT_RETURN_MARK(NewObjectV, jobject, (const jobject&)obj);
999
1000 instanceOop i = InstanceKlass::allocate_instance(JNIHandles::resolve_non_null(clazz), CHECK_NULL);
1001 obj = JNIHandles::make_local(THREAD, i);
1002 JavaValue jvalue(T_VOID);
1003 JNI_ArgumentPusherVaArg ap(methodID, args);
1004 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_NULL);
1005 return obj;
1006 JNI_END
1007
1008
1009 DT_RETURN_MARK_DECL(NewObject, jobject
1010 , HOTSPOT_JNI_NEWOBJECT_RETURN(_ret_ref));
1011
1012 JNI_ENTRY(jobject, jni_NewObject(JNIEnv *env, jclass clazz, jmethodID methodID, ...))
1013 HOTSPOT_JNI_NEWOBJECT_ENTRY(env, clazz, (uintptr_t) methodID);
1014
1015 jobject obj = NULL;
1016 DT_RETURN_MARK(NewObject, jobject, (const jobject&)obj);
1017
1018 instanceOop i = InstanceKlass::allocate_instance(JNIHandles::resolve_non_null(clazz), CHECK_NULL);
1019 obj = JNIHandles::make_local(THREAD, i);
1020 va_list args;
1021 va_start(args, methodID);
1022 JavaValue jvalue(T_VOID);
1023 JNI_ArgumentPusherVaArg ap(methodID, args);
1024 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_NULL);
1025 va_end(args);
1026 return obj;
1027 JNI_END
1028
1029
1030 JNI_ENTRY(jclass, jni_GetObjectClass(JNIEnv *env, jobject obj))
1031 HOTSPOT_JNI_GETOBJECTCLASS_ENTRY(env, obj);
1032
1033 Klass* k = JNIHandles::resolve_non_null(obj)->klass();
1034 jclass ret =
1035 (jclass) JNIHandles::make_local(THREAD, k->java_mirror());
1036
1037 HOTSPOT_JNI_GETOBJECTCLASS_RETURN(ret);
1038 return ret;
1039 JNI_END
1040
1041 JNI_ENTRY_NO_PRESERVE(jboolean, jni_IsInstanceOf(JNIEnv *env, jobject obj, jclass clazz))
1042 HOTSPOT_JNI_ISINSTANCEOF_ENTRY(env, obj, clazz);
1043
1044 jboolean ret = JNI_TRUE;
1045 if (obj != NULL) {
1046 ret = JNI_FALSE;
1047 Klass* k = java_lang_Class::as_Klass(
1048 JNIHandles::resolve_non_null(clazz));
1049 if (k != NULL) {
1050 ret = JNIHandles::resolve_non_null(obj)->is_a(k) ? JNI_TRUE : JNI_FALSE;
1051 }
1052 }
1053
1054 HOTSPOT_JNI_ISINSTANCEOF_RETURN(ret);
1055 return ret;
1056 JNI_END
1057
1058
get_method_id(JNIEnv * env,jclass clazz,const char * name_str,const char * sig,bool is_static,TRAPS)1059 static jmethodID get_method_id(JNIEnv *env, jclass clazz, const char *name_str,
1060 const char *sig, bool is_static, TRAPS) {
1061 // %%%% This code should probably just call into a method in the LinkResolver
1062 //
1063 // The class should have been loaded (we have an instance of the class
1064 // passed in) so the method and signature should already be in the symbol
1065 // table. If they're not there, the method doesn't exist.
1066 const char *name_to_probe = (name_str == NULL)
1067 ? vmSymbols::object_initializer_name()->as_C_string()
1068 : name_str;
1069 TempNewSymbol name = SymbolTable::probe(name_to_probe, (int)strlen(name_to_probe));
1070 TempNewSymbol signature = SymbolTable::probe(sig, (int)strlen(sig));
1071
1072 if (name == NULL || signature == NULL) {
1073 THROW_MSG_0(vmSymbols::java_lang_NoSuchMethodError(), name_str);
1074 }
1075
1076 oop mirror = JNIHandles::resolve_non_null(clazz);
1077 Klass* klass = java_lang_Class::as_Klass(mirror);
1078
1079 // Throw a NoSuchMethodError exception if we have an instance of a
1080 // primitive java.lang.Class
1081 if (java_lang_Class::is_primitive(mirror)) {
1082 ResourceMark rm(THREAD);
1083 THROW_MSG_0(vmSymbols::java_lang_NoSuchMethodError(), err_msg("%s%s.%s%s", is_static ? "static " : "", klass->signature_name(), name_str, sig));
1084 }
1085
1086 // Make sure class is linked and initialized before handing id's out to
1087 // Method*s.
1088 klass->initialize(CHECK_NULL);
1089
1090 Method* m;
1091 if (name == vmSymbols::object_initializer_name() ||
1092 name == vmSymbols::class_initializer_name()) {
1093 // Never search superclasses for constructors
1094 if (klass->is_instance_klass()) {
1095 m = InstanceKlass::cast(klass)->find_method(name, signature);
1096 } else {
1097 m = NULL;
1098 }
1099 } else {
1100 m = klass->lookup_method(name, signature);
1101 if (m == NULL && klass->is_instance_klass()) {
1102 m = InstanceKlass::cast(klass)->lookup_method_in_ordered_interfaces(name, signature);
1103 }
1104 }
1105 if (m == NULL || (m->is_static() != is_static)) {
1106 ResourceMark rm(THREAD);
1107 THROW_MSG_0(vmSymbols::java_lang_NoSuchMethodError(), err_msg("%s%s.%s%s", is_static ? "static " : "", klass->signature_name(), name_str, sig));
1108 }
1109 return m->jmethod_id();
1110 }
1111
1112
1113 JNI_ENTRY(jmethodID, jni_GetMethodID(JNIEnv *env, jclass clazz,
1114 const char *name, const char *sig))
1115 HOTSPOT_JNI_GETMETHODID_ENTRY(env, clazz, (char *) name, (char *) sig);
1116 jmethodID ret = get_method_id(env, clazz, name, sig, false, thread);
1117 HOTSPOT_JNI_GETMETHODID_RETURN((uintptr_t) ret);
1118 return ret;
1119 JNI_END
1120
1121
1122 JNI_ENTRY(jmethodID, jni_GetStaticMethodID(JNIEnv *env, jclass clazz,
1123 const char *name, const char *sig))
1124 HOTSPOT_JNI_GETSTATICMETHODID_ENTRY(env, (char *) clazz, (char *) name, (char *)sig);
1125 jmethodID ret = get_method_id(env, clazz, name, sig, true, thread);
1126 HOTSPOT_JNI_GETSTATICMETHODID_RETURN((uintptr_t) ret);
1127 return ret;
1128 JNI_END
1129
1130
1131
1132 //
1133 // Calling Methods
1134 //
1135
1136
1137 #define DEFINE_CALLMETHOD(ResultType, Result, Tag \
1138 , EntryProbe, ReturnProbe) \
1139 \
1140 DT_RETURN_MARK_DECL_FOR(Result, Call##Result##Method, ResultType \
1141 , ReturnProbe); \
1142 \
1143 JNI_ENTRY(ResultType, \
1144 jni_Call##Result##Method(JNIEnv *env, jobject obj, jmethodID methodID, ...)) \
1145 \
1146 EntryProbe; \
1147 ResultType ret = 0;\
1148 DT_RETURN_MARK_FOR(Result, Call##Result##Method, ResultType, \
1149 (const ResultType&)ret);\
1150 \
1151 va_list args; \
1152 va_start(args, methodID); \
1153 JavaValue jvalue(Tag); \
1154 JNI_ArgumentPusherVaArg ap(methodID, args); \
1155 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK_0); \
1156 va_end(args); \
1157 ret = jvalue.get_##ResultType(); \
1158 return ret;\
1159 JNI_END
1160
1161 // the runtime type of subword integral basic types is integer
1162 DEFINE_CALLMETHOD(jboolean, Boolean, T_BOOLEAN
1163 , HOTSPOT_JNI_CALLBOOLEANMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1164 HOTSPOT_JNI_CALLBOOLEANMETHOD_RETURN(_ret_ref))
1165 DEFINE_CALLMETHOD(jbyte, Byte, T_BYTE
1166 , HOTSPOT_JNI_CALLBYTEMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1167 HOTSPOT_JNI_CALLBYTEMETHOD_RETURN(_ret_ref))
1168 DEFINE_CALLMETHOD(jchar, Char, T_CHAR
1169 , HOTSPOT_JNI_CALLCHARMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1170 HOTSPOT_JNI_CALLCHARMETHOD_RETURN(_ret_ref))
1171 DEFINE_CALLMETHOD(jshort, Short, T_SHORT
1172 , HOTSPOT_JNI_CALLSHORTMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1173 HOTSPOT_JNI_CALLSHORTMETHOD_RETURN(_ret_ref))
1174
1175 DEFINE_CALLMETHOD(jobject, Object, T_OBJECT
1176 , HOTSPOT_JNI_CALLOBJECTMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1177 HOTSPOT_JNI_CALLOBJECTMETHOD_RETURN(_ret_ref))
1178 DEFINE_CALLMETHOD(jint, Int, T_INT,
1179 HOTSPOT_JNI_CALLINTMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1180 HOTSPOT_JNI_CALLINTMETHOD_RETURN(_ret_ref))
1181 DEFINE_CALLMETHOD(jlong, Long, T_LONG
1182 , HOTSPOT_JNI_CALLLONGMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1183 HOTSPOT_JNI_CALLLONGMETHOD_RETURN(_ret_ref))
1184 // Float and double probes don't return value because dtrace doesn't currently support it
1185 DEFINE_CALLMETHOD(jfloat, Float, T_FLOAT
1186 , HOTSPOT_JNI_CALLFLOATMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1187 HOTSPOT_JNI_CALLFLOATMETHOD_RETURN())
1188 DEFINE_CALLMETHOD(jdouble, Double, T_DOUBLE
1189 , HOTSPOT_JNI_CALLDOUBLEMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1190 HOTSPOT_JNI_CALLDOUBLEMETHOD_RETURN())
1191
1192 #define DEFINE_CALLMETHODV(ResultType, Result, Tag \
1193 , EntryProbe, ReturnProbe) \
1194 \
1195 DT_RETURN_MARK_DECL_FOR(Result, Call##Result##MethodV, ResultType \
1196 , ReturnProbe); \
1197 \
1198 JNI_ENTRY(ResultType, \
1199 jni_Call##Result##MethodV(JNIEnv *env, jobject obj, jmethodID methodID, va_list args)) \
1200 \
1201 EntryProbe;\
1202 ResultType ret = 0;\
1203 DT_RETURN_MARK_FOR(Result, Call##Result##MethodV, ResultType, \
1204 (const ResultType&)ret);\
1205 \
1206 JavaValue jvalue(Tag); \
1207 JNI_ArgumentPusherVaArg ap(methodID, args); \
1208 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK_0); \
1209 ret = jvalue.get_##ResultType(); \
1210 return ret;\
1211 JNI_END
1212
1213 // the runtime type of subword integral basic types is integer
1214 DEFINE_CALLMETHODV(jboolean, Boolean, T_BOOLEAN
1215 , HOTSPOT_JNI_CALLBOOLEANMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1216 HOTSPOT_JNI_CALLBOOLEANMETHODV_RETURN(_ret_ref))
1217 DEFINE_CALLMETHODV(jbyte, Byte, T_BYTE
1218 , HOTSPOT_JNI_CALLBYTEMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1219 HOTSPOT_JNI_CALLBYTEMETHODV_RETURN(_ret_ref))
1220 DEFINE_CALLMETHODV(jchar, Char, T_CHAR
1221 , HOTSPOT_JNI_CALLCHARMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1222 HOTSPOT_JNI_CALLCHARMETHODV_RETURN(_ret_ref))
1223 DEFINE_CALLMETHODV(jshort, Short, T_SHORT
1224 , HOTSPOT_JNI_CALLSHORTMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1225 HOTSPOT_JNI_CALLSHORTMETHODV_RETURN(_ret_ref))
1226
1227 DEFINE_CALLMETHODV(jobject, Object, T_OBJECT
1228 , HOTSPOT_JNI_CALLOBJECTMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1229 HOTSPOT_JNI_CALLOBJECTMETHODV_RETURN(_ret_ref))
1230 DEFINE_CALLMETHODV(jint, Int, T_INT,
1231 HOTSPOT_JNI_CALLINTMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1232 HOTSPOT_JNI_CALLINTMETHODV_RETURN(_ret_ref))
1233 DEFINE_CALLMETHODV(jlong, Long, T_LONG
1234 , HOTSPOT_JNI_CALLLONGMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1235 HOTSPOT_JNI_CALLLONGMETHODV_RETURN(_ret_ref))
1236 // Float and double probes don't return value because dtrace doesn't currently support it
1237 DEFINE_CALLMETHODV(jfloat, Float, T_FLOAT
1238 , HOTSPOT_JNI_CALLFLOATMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1239 HOTSPOT_JNI_CALLFLOATMETHODV_RETURN())
1240 DEFINE_CALLMETHODV(jdouble, Double, T_DOUBLE
1241 , HOTSPOT_JNI_CALLDOUBLEMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1242 HOTSPOT_JNI_CALLDOUBLEMETHODV_RETURN())
1243
1244 #define DEFINE_CALLMETHODA(ResultType, Result, Tag \
1245 , EntryProbe, ReturnProbe) \
1246 \
1247 DT_RETURN_MARK_DECL_FOR(Result, Call##Result##MethodA, ResultType \
1248 , ReturnProbe); \
1249 \
1250 JNI_ENTRY(ResultType, \
1251 jni_Call##Result##MethodA(JNIEnv *env, jobject obj, jmethodID methodID, const jvalue *args)) \
1252 EntryProbe; \
1253 ResultType ret = 0;\
1254 DT_RETURN_MARK_FOR(Result, Call##Result##MethodA, ResultType, \
1255 (const ResultType&)ret);\
1256 \
1257 JavaValue jvalue(Tag); \
1258 JNI_ArgumentPusherArray ap(methodID, args); \
1259 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK_0); \
1260 ret = jvalue.get_##ResultType(); \
1261 return ret;\
1262 JNI_END
1263
1264 // the runtime type of subword integral basic types is integer
1265 DEFINE_CALLMETHODA(jboolean, Boolean, T_BOOLEAN
1266 , HOTSPOT_JNI_CALLBOOLEANMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1267 HOTSPOT_JNI_CALLBOOLEANMETHODA_RETURN(_ret_ref))
1268 DEFINE_CALLMETHODA(jbyte, Byte, T_BYTE
1269 , HOTSPOT_JNI_CALLBYTEMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1270 HOTSPOT_JNI_CALLBYTEMETHODA_RETURN(_ret_ref))
1271 DEFINE_CALLMETHODA(jchar, Char, T_CHAR
1272 , HOTSPOT_JNI_CALLCHARMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1273 HOTSPOT_JNI_CALLCHARMETHODA_RETURN(_ret_ref))
1274 DEFINE_CALLMETHODA(jshort, Short, T_SHORT
1275 , HOTSPOT_JNI_CALLSHORTMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1276 HOTSPOT_JNI_CALLSHORTMETHODA_RETURN(_ret_ref))
1277
1278 DEFINE_CALLMETHODA(jobject, Object, T_OBJECT
1279 , HOTSPOT_JNI_CALLOBJECTMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1280 HOTSPOT_JNI_CALLOBJECTMETHODA_RETURN(_ret_ref))
1281 DEFINE_CALLMETHODA(jint, Int, T_INT,
1282 HOTSPOT_JNI_CALLINTMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1283 HOTSPOT_JNI_CALLINTMETHODA_RETURN(_ret_ref))
1284 DEFINE_CALLMETHODA(jlong, Long, T_LONG
1285 , HOTSPOT_JNI_CALLLONGMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1286 HOTSPOT_JNI_CALLLONGMETHODA_RETURN(_ret_ref))
1287 // Float and double probes don't return value because dtrace doesn't currently support it
1288 DEFINE_CALLMETHODA(jfloat, Float, T_FLOAT
1289 , HOTSPOT_JNI_CALLFLOATMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1290 HOTSPOT_JNI_CALLFLOATMETHODA_RETURN())
1291 DEFINE_CALLMETHODA(jdouble, Double, T_DOUBLE
1292 , HOTSPOT_JNI_CALLDOUBLEMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1293 HOTSPOT_JNI_CALLDOUBLEMETHODA_RETURN())
1294
1295 DT_VOID_RETURN_MARK_DECL(CallVoidMethod, HOTSPOT_JNI_CALLVOIDMETHOD_RETURN());
1296 DT_VOID_RETURN_MARK_DECL(CallVoidMethodV, HOTSPOT_JNI_CALLVOIDMETHODV_RETURN());
1297 DT_VOID_RETURN_MARK_DECL(CallVoidMethodA, HOTSPOT_JNI_CALLVOIDMETHODA_RETURN());
1298
1299
1300 JNI_ENTRY(void, jni_CallVoidMethod(JNIEnv *env, jobject obj, jmethodID methodID, ...))
1301 HOTSPOT_JNI_CALLVOIDMETHOD_ENTRY(env, obj, (uintptr_t) methodID);
1302 DT_VOID_RETURN_MARK(CallVoidMethod);
1303
1304 va_list args;
1305 va_start(args, methodID);
1306 JavaValue jvalue(T_VOID);
1307 JNI_ArgumentPusherVaArg ap(methodID, args);
1308 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK);
1309 va_end(args);
1310 JNI_END
1311
1312
1313 JNI_ENTRY(void, jni_CallVoidMethodV(JNIEnv *env, jobject obj, jmethodID methodID, va_list args))
1314 HOTSPOT_JNI_CALLVOIDMETHODV_ENTRY(env, obj, (uintptr_t) methodID);
1315 DT_VOID_RETURN_MARK(CallVoidMethodV);
1316
1317 JavaValue jvalue(T_VOID);
1318 JNI_ArgumentPusherVaArg ap(methodID, args);
1319 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK);
1320 JNI_END
1321
1322
1323 JNI_ENTRY(void, jni_CallVoidMethodA(JNIEnv *env, jobject obj, jmethodID methodID, const jvalue *args))
1324 HOTSPOT_JNI_CALLVOIDMETHODA_ENTRY(env, obj, (uintptr_t) methodID);
1325 DT_VOID_RETURN_MARK(CallVoidMethodA);
1326
1327 JavaValue jvalue(T_VOID);
1328 JNI_ArgumentPusherArray ap(methodID, args);
1329 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK);
1330 JNI_END
1331
1332
1333
1334 #define DEFINE_CALLNONVIRTUALMETHOD(ResultType, Result, Tag \
1335 , EntryProbe, ReturnProbe) \
1336 \
1337 DT_RETURN_MARK_DECL_FOR(Result, CallNonvirtual##Result##Method, ResultType \
1338 , ReturnProbe);\
1339 \
1340 JNI_ENTRY(ResultType, \
1341 jni_CallNonvirtual##Result##Method(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, ...)) \
1342 \
1343 EntryProbe;\
1344 ResultType ret;\
1345 DT_RETURN_MARK_FOR(Result, CallNonvirtual##Result##Method, ResultType, \
1346 (const ResultType&)ret);\
1347 \
1348 va_list args; \
1349 va_start(args, methodID); \
1350 JavaValue jvalue(Tag); \
1351 JNI_ArgumentPusherVaArg ap(methodID, args); \
1352 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_0); \
1353 va_end(args); \
1354 ret = jvalue.get_##ResultType(); \
1355 return ret;\
1356 JNI_END
1357
1358 // the runtime type of subword integral basic types is integer
1359 DEFINE_CALLNONVIRTUALMETHOD(jboolean, Boolean, T_BOOLEAN
1360 , HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1361 HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHOD_RETURN(_ret_ref))
1362 DEFINE_CALLNONVIRTUALMETHOD(jbyte, Byte, T_BYTE
1363 , HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1364 HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHOD_RETURN(_ret_ref))
1365 DEFINE_CALLNONVIRTUALMETHOD(jchar, Char, T_CHAR
1366 , HOTSPOT_JNI_CALLNONVIRTUALCHARMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1367 HOTSPOT_JNI_CALLNONVIRTUALCHARMETHOD_RETURN(_ret_ref))
1368 DEFINE_CALLNONVIRTUALMETHOD(jshort, Short, T_SHORT
1369 , HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1370 HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHOD_RETURN(_ret_ref))
1371
1372 DEFINE_CALLNONVIRTUALMETHOD(jobject, Object, T_OBJECT
1373 , HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1374 HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHOD_RETURN(_ret_ref))
1375 DEFINE_CALLNONVIRTUALMETHOD(jint, Int, T_INT
1376 , HOTSPOT_JNI_CALLNONVIRTUALINTMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1377 HOTSPOT_JNI_CALLNONVIRTUALINTMETHOD_RETURN(_ret_ref))
1378 DEFINE_CALLNONVIRTUALMETHOD(jlong, Long, T_LONG
1379 , HOTSPOT_JNI_CALLNONVIRTUALLONGMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1380 // Float and double probes don't return value because dtrace doesn't currently support it
1381 HOTSPOT_JNI_CALLNONVIRTUALLONGMETHOD_RETURN(_ret_ref))
1382 DEFINE_CALLNONVIRTUALMETHOD(jfloat, Float, T_FLOAT
1383 , HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1384 HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHOD_RETURN())
1385 DEFINE_CALLNONVIRTUALMETHOD(jdouble, Double, T_DOUBLE
1386 , HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1387 HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHOD_RETURN())
1388
1389 #define DEFINE_CALLNONVIRTUALMETHODV(ResultType, Result, Tag \
1390 , EntryProbe, ReturnProbe) \
1391 \
1392 DT_RETURN_MARK_DECL_FOR(Result, CallNonvirtual##Result##MethodV, ResultType \
1393 , ReturnProbe);\
1394 \
1395 JNI_ENTRY(ResultType, \
1396 jni_CallNonvirtual##Result##MethodV(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, va_list args)) \
1397 \
1398 EntryProbe;\
1399 ResultType ret;\
1400 DT_RETURN_MARK_FOR(Result, CallNonvirtual##Result##MethodV, ResultType, \
1401 (const ResultType&)ret);\
1402 \
1403 JavaValue jvalue(Tag); \
1404 JNI_ArgumentPusherVaArg ap(methodID, args); \
1405 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_0); \
1406 ret = jvalue.get_##ResultType(); \
1407 return ret;\
1408 JNI_END
1409
1410 // the runtime type of subword integral basic types is integer
1411 DEFINE_CALLNONVIRTUALMETHODV(jboolean, Boolean, T_BOOLEAN
1412 , HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1413 HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHODV_RETURN(_ret_ref))
1414 DEFINE_CALLNONVIRTUALMETHODV(jbyte, Byte, T_BYTE
1415 , HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1416 HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHODV_RETURN(_ret_ref))
1417 DEFINE_CALLNONVIRTUALMETHODV(jchar, Char, T_CHAR
1418 , HOTSPOT_JNI_CALLNONVIRTUALCHARMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1419 HOTSPOT_JNI_CALLNONVIRTUALCHARMETHODV_RETURN(_ret_ref))
1420 DEFINE_CALLNONVIRTUALMETHODV(jshort, Short, T_SHORT
1421 , HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1422 HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHODV_RETURN(_ret_ref))
1423
1424 DEFINE_CALLNONVIRTUALMETHODV(jobject, Object, T_OBJECT
1425 , HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1426 HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHODV_RETURN(_ret_ref))
1427 DEFINE_CALLNONVIRTUALMETHODV(jint, Int, T_INT
1428 , HOTSPOT_JNI_CALLNONVIRTUALINTMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1429 HOTSPOT_JNI_CALLNONVIRTUALINTMETHODV_RETURN(_ret_ref))
1430 DEFINE_CALLNONVIRTUALMETHODV(jlong, Long, T_LONG
1431 , HOTSPOT_JNI_CALLNONVIRTUALLONGMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1432 // Float and double probes don't return value because dtrace doesn't currently support it
1433 HOTSPOT_JNI_CALLNONVIRTUALLONGMETHODV_RETURN(_ret_ref))
1434 DEFINE_CALLNONVIRTUALMETHODV(jfloat, Float, T_FLOAT
1435 , HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1436 HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHODV_RETURN())
1437 DEFINE_CALLNONVIRTUALMETHODV(jdouble, Double, T_DOUBLE
1438 , HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1439 HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHODV_RETURN())
1440
1441 #define DEFINE_CALLNONVIRTUALMETHODA(ResultType, Result, Tag \
1442 , EntryProbe, ReturnProbe) \
1443 \
1444 DT_RETURN_MARK_DECL_FOR(Result, CallNonvirtual##Result##MethodA, ResultType \
1445 , ReturnProbe);\
1446 \
1447 JNI_ENTRY(ResultType, \
1448 jni_CallNonvirtual##Result##MethodA(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, const jvalue *args)) \
1449 \
1450 EntryProbe;\
1451 ResultType ret;\
1452 DT_RETURN_MARK_FOR(Result, CallNonvirtual##Result##MethodA, ResultType, \
1453 (const ResultType&)ret);\
1454 \
1455 JavaValue jvalue(Tag); \
1456 JNI_ArgumentPusherArray ap(methodID, args); \
1457 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_0); \
1458 ret = jvalue.get_##ResultType(); \
1459 return ret;\
1460 JNI_END
1461
1462 // the runtime type of subword integral basic types is integer
1463 DEFINE_CALLNONVIRTUALMETHODA(jboolean, Boolean, T_BOOLEAN
1464 , HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1465 HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHODA_RETURN(_ret_ref))
1466 DEFINE_CALLNONVIRTUALMETHODA(jbyte, Byte, T_BYTE
1467 , HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1468 HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHODA_RETURN(_ret_ref))
1469 DEFINE_CALLNONVIRTUALMETHODA(jchar, Char, T_CHAR
1470 , HOTSPOT_JNI_CALLNONVIRTUALCHARMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1471 HOTSPOT_JNI_CALLNONVIRTUALCHARMETHODA_RETURN(_ret_ref))
1472 DEFINE_CALLNONVIRTUALMETHODA(jshort, Short, T_SHORT
1473 , HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1474 HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHODA_RETURN(_ret_ref))
1475
1476 DEFINE_CALLNONVIRTUALMETHODA(jobject, Object, T_OBJECT
1477 , HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1478 HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHODA_RETURN(_ret_ref))
1479 DEFINE_CALLNONVIRTUALMETHODA(jint, Int, T_INT
1480 , HOTSPOT_JNI_CALLNONVIRTUALINTMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1481 HOTSPOT_JNI_CALLNONVIRTUALINTMETHODA_RETURN(_ret_ref))
1482 DEFINE_CALLNONVIRTUALMETHODA(jlong, Long, T_LONG
1483 , HOTSPOT_JNI_CALLNONVIRTUALLONGMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1484 // Float and double probes don't return value because dtrace doesn't currently support it
1485 HOTSPOT_JNI_CALLNONVIRTUALLONGMETHODA_RETURN(_ret_ref))
1486 DEFINE_CALLNONVIRTUALMETHODA(jfloat, Float, T_FLOAT
1487 , HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1488 HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHODA_RETURN())
1489 DEFINE_CALLNONVIRTUALMETHODA(jdouble, Double, T_DOUBLE
1490 , HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1491 HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHODA_RETURN())
1492
1493 DT_VOID_RETURN_MARK_DECL(CallNonvirtualVoidMethod
1494 , HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHOD_RETURN());
1495 DT_VOID_RETURN_MARK_DECL(CallNonvirtualVoidMethodV
1496 , HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHODV_RETURN());
1497 DT_VOID_RETURN_MARK_DECL(CallNonvirtualVoidMethodA
1498 , HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHODA_RETURN());
1499
1500 JNI_ENTRY(void, jni_CallNonvirtualVoidMethod(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, ...))
1501 HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHOD_ENTRY(env, obj, cls, (uintptr_t) methodID);
1502 DT_VOID_RETURN_MARK(CallNonvirtualVoidMethod);
1503
1504 va_list args;
1505 va_start(args, methodID);
1506 JavaValue jvalue(T_VOID);
1507 JNI_ArgumentPusherVaArg ap(methodID, args);
1508 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK);
1509 va_end(args);
1510 JNI_END
1511
1512
1513 JNI_ENTRY(void, jni_CallNonvirtualVoidMethodV(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, va_list args))
1514 HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHODV_ENTRY(
1515 env, obj, cls, (uintptr_t) methodID);
1516 DT_VOID_RETURN_MARK(CallNonvirtualVoidMethodV);
1517
1518 JavaValue jvalue(T_VOID);
1519 JNI_ArgumentPusherVaArg ap(methodID, args);
1520 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK);
1521 JNI_END
1522
1523
1524 JNI_ENTRY(void, jni_CallNonvirtualVoidMethodA(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, const jvalue *args))
1525 HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHODA_ENTRY(
1526 env, obj, cls, (uintptr_t) methodID);
1527 DT_VOID_RETURN_MARK(CallNonvirtualVoidMethodA);
1528 JavaValue jvalue(T_VOID);
1529 JNI_ArgumentPusherArray ap(methodID, args);
1530 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK);
1531 JNI_END
1532
1533
1534
1535 #define DEFINE_CALLSTATICMETHOD(ResultType, Result, Tag \
1536 , EntryProbe, ResultProbe) \
1537 \
1538 DT_RETURN_MARK_DECL_FOR(Result, CallStatic##Result##Method, ResultType \
1539 , ResultProbe); \
1540 \
1541 JNI_ENTRY(ResultType, \
1542 jni_CallStatic##Result##Method(JNIEnv *env, jclass cls, jmethodID methodID, ...)) \
1543 \
1544 EntryProbe; \
1545 ResultType ret = 0;\
1546 DT_RETURN_MARK_FOR(Result, CallStatic##Result##Method, ResultType, \
1547 (const ResultType&)ret);\
1548 \
1549 va_list args; \
1550 va_start(args, methodID); \
1551 JavaValue jvalue(Tag); \
1552 JNI_ArgumentPusherVaArg ap(methodID, args); \
1553 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK_0); \
1554 va_end(args); \
1555 ret = jvalue.get_##ResultType(); \
1556 return ret;\
1557 JNI_END
1558
1559 // the runtime type of subword integral basic types is integer
1560 DEFINE_CALLSTATICMETHOD(jboolean, Boolean, T_BOOLEAN
1561 , HOTSPOT_JNI_CALLSTATICBOOLEANMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1562 HOTSPOT_JNI_CALLSTATICBOOLEANMETHOD_RETURN(_ret_ref));
1563 DEFINE_CALLSTATICMETHOD(jbyte, Byte, T_BYTE
1564 , HOTSPOT_JNI_CALLSTATICBYTEMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1565 HOTSPOT_JNI_CALLSTATICBYTEMETHOD_RETURN(_ret_ref));
1566 DEFINE_CALLSTATICMETHOD(jchar, Char, T_CHAR
1567 , HOTSPOT_JNI_CALLSTATICCHARMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1568 HOTSPOT_JNI_CALLSTATICCHARMETHOD_RETURN(_ret_ref));
1569 DEFINE_CALLSTATICMETHOD(jshort, Short, T_SHORT
1570 , HOTSPOT_JNI_CALLSTATICSHORTMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1571 HOTSPOT_JNI_CALLSTATICSHORTMETHOD_RETURN(_ret_ref));
1572
1573 DEFINE_CALLSTATICMETHOD(jobject, Object, T_OBJECT
1574 , HOTSPOT_JNI_CALLSTATICOBJECTMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1575 HOTSPOT_JNI_CALLSTATICOBJECTMETHOD_RETURN(_ret_ref));
1576 DEFINE_CALLSTATICMETHOD(jint, Int, T_INT
1577 , HOTSPOT_JNI_CALLSTATICINTMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1578 HOTSPOT_JNI_CALLSTATICINTMETHOD_RETURN(_ret_ref));
1579 DEFINE_CALLSTATICMETHOD(jlong, Long, T_LONG
1580 , HOTSPOT_JNI_CALLSTATICLONGMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1581 HOTSPOT_JNI_CALLSTATICLONGMETHOD_RETURN(_ret_ref));
1582 // Float and double probes don't return value because dtrace doesn't currently support it
1583 DEFINE_CALLSTATICMETHOD(jfloat, Float, T_FLOAT
1584 , HOTSPOT_JNI_CALLSTATICFLOATMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1585 HOTSPOT_JNI_CALLSTATICFLOATMETHOD_RETURN());
1586 DEFINE_CALLSTATICMETHOD(jdouble, Double, T_DOUBLE
1587 , HOTSPOT_JNI_CALLSTATICDOUBLEMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1588 HOTSPOT_JNI_CALLSTATICDOUBLEMETHOD_RETURN());
1589
1590 #define DEFINE_CALLSTATICMETHODV(ResultType, Result, Tag \
1591 , EntryProbe, ResultProbe) \
1592 \
1593 DT_RETURN_MARK_DECL_FOR(Result, CallStatic##Result##MethodV, ResultType \
1594 , ResultProbe); \
1595 \
1596 JNI_ENTRY(ResultType, \
1597 jni_CallStatic##Result##MethodV(JNIEnv *env, jclass cls, jmethodID methodID, va_list args)) \
1598 \
1599 EntryProbe; \
1600 ResultType ret = 0;\
1601 DT_RETURN_MARK_FOR(Result, CallStatic##Result##MethodV, ResultType, \
1602 (const ResultType&)ret);\
1603 \
1604 JavaValue jvalue(Tag); \
1605 JNI_ArgumentPusherVaArg ap(methodID, args); \
1606 /* Make sure class is initialized before trying to invoke its method */ \
1607 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); \
1608 k->initialize(CHECK_0); \
1609 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK_0); \
1610 va_end(args); \
1611 ret = jvalue.get_##ResultType(); \
1612 return ret;\
1613 JNI_END
1614
1615 // the runtime type of subword integral basic types is integer
1616 DEFINE_CALLSTATICMETHODV(jboolean, Boolean, T_BOOLEAN
1617 , HOTSPOT_JNI_CALLSTATICBOOLEANMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1618 HOTSPOT_JNI_CALLSTATICBOOLEANMETHODV_RETURN(_ret_ref));
1619 DEFINE_CALLSTATICMETHODV(jbyte, Byte, T_BYTE
1620 , HOTSPOT_JNI_CALLSTATICBYTEMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1621 HOTSPOT_JNI_CALLSTATICBYTEMETHODV_RETURN(_ret_ref));
1622 DEFINE_CALLSTATICMETHODV(jchar, Char, T_CHAR
1623 , HOTSPOT_JNI_CALLSTATICCHARMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1624 HOTSPOT_JNI_CALLSTATICCHARMETHODV_RETURN(_ret_ref));
1625 DEFINE_CALLSTATICMETHODV(jshort, Short, T_SHORT
1626 , HOTSPOT_JNI_CALLSTATICSHORTMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1627 HOTSPOT_JNI_CALLSTATICSHORTMETHODV_RETURN(_ret_ref));
1628
1629 DEFINE_CALLSTATICMETHODV(jobject, Object, T_OBJECT
1630 , HOTSPOT_JNI_CALLSTATICOBJECTMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1631 HOTSPOT_JNI_CALLSTATICOBJECTMETHODV_RETURN(_ret_ref));
1632 DEFINE_CALLSTATICMETHODV(jint, Int, T_INT
1633 , HOTSPOT_JNI_CALLSTATICINTMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1634 HOTSPOT_JNI_CALLSTATICINTMETHODV_RETURN(_ret_ref));
1635 DEFINE_CALLSTATICMETHODV(jlong, Long, T_LONG
1636 , HOTSPOT_JNI_CALLSTATICLONGMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1637 HOTSPOT_JNI_CALLSTATICLONGMETHODV_RETURN(_ret_ref));
1638 // Float and double probes don't return value because dtrace doesn't currently support it
1639 DEFINE_CALLSTATICMETHODV(jfloat, Float, T_FLOAT
1640 , HOTSPOT_JNI_CALLSTATICFLOATMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1641 HOTSPOT_JNI_CALLSTATICFLOATMETHODV_RETURN());
1642 DEFINE_CALLSTATICMETHODV(jdouble, Double, T_DOUBLE
1643 , HOTSPOT_JNI_CALLSTATICDOUBLEMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1644 HOTSPOT_JNI_CALLSTATICDOUBLEMETHODV_RETURN());
1645
1646 #define DEFINE_CALLSTATICMETHODA(ResultType, Result, Tag \
1647 , EntryProbe, ResultProbe) \
1648 \
1649 DT_RETURN_MARK_DECL_FOR(Result, CallStatic##Result##MethodA, ResultType \
1650 , ResultProbe); \
1651 \
1652 JNI_ENTRY(ResultType, \
1653 jni_CallStatic##Result##MethodA(JNIEnv *env, jclass cls, jmethodID methodID, const jvalue *args)) \
1654 \
1655 EntryProbe; \
1656 ResultType ret = 0;\
1657 DT_RETURN_MARK_FOR(Result, CallStatic##Result##MethodA, ResultType, \
1658 (const ResultType&)ret);\
1659 \
1660 JavaValue jvalue(Tag); \
1661 JNI_ArgumentPusherArray ap(methodID, args); \
1662 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK_0); \
1663 ret = jvalue.get_##ResultType(); \
1664 return ret;\
1665 JNI_END
1666
1667 // the runtime type of subword integral basic types is integer
1668 DEFINE_CALLSTATICMETHODA(jboolean, Boolean, T_BOOLEAN
1669 , HOTSPOT_JNI_CALLSTATICBOOLEANMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1670 HOTSPOT_JNI_CALLSTATICBOOLEANMETHODA_RETURN(_ret_ref));
1671 DEFINE_CALLSTATICMETHODA(jbyte, Byte, T_BYTE
1672 , HOTSPOT_JNI_CALLSTATICBYTEMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1673 HOTSPOT_JNI_CALLSTATICBYTEMETHODA_RETURN(_ret_ref));
1674 DEFINE_CALLSTATICMETHODA(jchar, Char, T_CHAR
1675 , HOTSPOT_JNI_CALLSTATICCHARMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1676 HOTSPOT_JNI_CALLSTATICCHARMETHODA_RETURN(_ret_ref));
1677 DEFINE_CALLSTATICMETHODA(jshort, Short, T_SHORT
1678 , HOTSPOT_JNI_CALLSTATICSHORTMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1679 HOTSPOT_JNI_CALLSTATICSHORTMETHODA_RETURN(_ret_ref));
1680
1681 DEFINE_CALLSTATICMETHODA(jobject, Object, T_OBJECT
1682 , HOTSPOT_JNI_CALLSTATICOBJECTMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1683 HOTSPOT_JNI_CALLSTATICOBJECTMETHODA_RETURN(_ret_ref));
1684 DEFINE_CALLSTATICMETHODA(jint, Int, T_INT
1685 , HOTSPOT_JNI_CALLSTATICINTMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1686 HOTSPOT_JNI_CALLSTATICINTMETHODA_RETURN(_ret_ref));
1687 DEFINE_CALLSTATICMETHODA(jlong, Long, T_LONG
1688 , HOTSPOT_JNI_CALLSTATICLONGMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1689 HOTSPOT_JNI_CALLSTATICLONGMETHODA_RETURN(_ret_ref));
1690 // Float and double probes don't return value because dtrace doesn't currently support it
1691 DEFINE_CALLSTATICMETHODA(jfloat, Float, T_FLOAT
1692 , HOTSPOT_JNI_CALLSTATICFLOATMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1693 HOTSPOT_JNI_CALLSTATICFLOATMETHODA_RETURN());
1694 DEFINE_CALLSTATICMETHODA(jdouble, Double, T_DOUBLE
1695 , HOTSPOT_JNI_CALLSTATICDOUBLEMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1696 HOTSPOT_JNI_CALLSTATICDOUBLEMETHODA_RETURN());
1697
1698 DT_VOID_RETURN_MARK_DECL(CallStaticVoidMethod
1699 , HOTSPOT_JNI_CALLSTATICVOIDMETHOD_RETURN());
1700 DT_VOID_RETURN_MARK_DECL(CallStaticVoidMethodV
1701 , HOTSPOT_JNI_CALLSTATICVOIDMETHODV_RETURN());
1702 DT_VOID_RETURN_MARK_DECL(CallStaticVoidMethodA
1703 , HOTSPOT_JNI_CALLSTATICVOIDMETHODA_RETURN());
1704
1705 JNI_ENTRY(void, jni_CallStaticVoidMethod(JNIEnv *env, jclass cls, jmethodID methodID, ...))
1706 HOTSPOT_JNI_CALLSTATICVOIDMETHOD_ENTRY(env, cls, (uintptr_t) methodID);
1707 DT_VOID_RETURN_MARK(CallStaticVoidMethod);
1708
1709 va_list args;
1710 va_start(args, methodID);
1711 JavaValue jvalue(T_VOID);
1712 JNI_ArgumentPusherVaArg ap(methodID, args);
1713 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK);
1714 va_end(args);
1715 JNI_END
1716
1717
1718 JNI_ENTRY(void, jni_CallStaticVoidMethodV(JNIEnv *env, jclass cls, jmethodID methodID, va_list args))
1719 HOTSPOT_JNI_CALLSTATICVOIDMETHODV_ENTRY(env, cls, (uintptr_t) methodID);
1720 DT_VOID_RETURN_MARK(CallStaticVoidMethodV);
1721
1722 JavaValue jvalue(T_VOID);
1723 JNI_ArgumentPusherVaArg ap(methodID, args);
1724 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK);
1725 JNI_END
1726
1727
1728 JNI_ENTRY(void, jni_CallStaticVoidMethodA(JNIEnv *env, jclass cls, jmethodID methodID, const jvalue *args))
1729 HOTSPOT_JNI_CALLSTATICVOIDMETHODA_ENTRY(env, cls, (uintptr_t) methodID);
1730 DT_VOID_RETURN_MARK(CallStaticVoidMethodA);
1731
1732 JavaValue jvalue(T_VOID);
1733 JNI_ArgumentPusherArray ap(methodID, args);
1734 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK);
1735 JNI_END
1736
1737
1738 //
1739 // Accessing Fields
1740 //
1741
1742
1743 DT_RETURN_MARK_DECL(GetFieldID, jfieldID
1744 , HOTSPOT_JNI_GETFIELDID_RETURN((uintptr_t)_ret_ref));
1745
1746 JNI_ENTRY(jfieldID, jni_GetFieldID(JNIEnv *env, jclass clazz,
1747 const char *name, const char *sig))
1748 HOTSPOT_JNI_GETFIELDID_ENTRY(env, clazz, (char *) name, (char *) sig);
1749 jfieldID ret = 0;
1750 DT_RETURN_MARK(GetFieldID, jfieldID, (const jfieldID&)ret);
1751
1752 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz));
1753
1754 // The class should have been loaded (we have an instance of the class
1755 // passed in) so the field and signature should already be in the symbol
1756 // table. If they're not there, the field doesn't exist.
1757 TempNewSymbol fieldname = SymbolTable::probe(name, (int)strlen(name));
1758 TempNewSymbol signame = SymbolTable::probe(sig, (int)strlen(sig));
1759 if (fieldname == NULL || signame == NULL) {
1760 ResourceMark rm;
1761 THROW_MSG_0(vmSymbols::java_lang_NoSuchFieldError(), err_msg("%s.%s %s", k->external_name(), name, sig));
1762 }
1763
1764 // Make sure class is initialized before handing id's out to fields
1765 k->initialize(CHECK_NULL);
1766
1767 fieldDescriptor fd;
1768 if (!k->is_instance_klass() ||
1769 !InstanceKlass::cast(k)->find_field(fieldname, signame, false, &fd)) {
1770 ResourceMark rm;
1771 THROW_MSG_0(vmSymbols::java_lang_NoSuchFieldError(), err_msg("%s.%s %s", k->external_name(), name, sig));
1772 }
1773
1774 // A jfieldID for a non-static field is simply the offset of the field within the instanceOop
1775 // It may also have hash bits for k, if VerifyJNIFields is turned on.
1776 ret = jfieldIDWorkaround::to_instance_jfieldID(k, fd.offset());
1777 return ret;
1778 JNI_END
1779
1780
1781 JNI_ENTRY(jobject, jni_GetObjectField(JNIEnv *env, jobject obj, jfieldID fieldID))
1782 HOTSPOT_JNI_GETOBJECTFIELD_ENTRY(env, obj, (uintptr_t) fieldID);
1783 oop o = JNIHandles::resolve_non_null(obj);
1784 Klass* k = o->klass();
1785 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID);
1786 // Keep JVMTI addition small and only check enabled flag here.
1787 // jni_GetField_probe() assumes that is okay to create handles.
1788 if (JvmtiExport::should_post_field_access()) {
1789 o = JvmtiExport::jni_GetField_probe(thread, obj, o, k, fieldID, false);
1790 }
1791 oop loaded_obj = HeapAccess<ON_UNKNOWN_OOP_REF>::oop_load_at(o, offset);
1792 jobject ret = JNIHandles::make_local(THREAD, loaded_obj);
1793 HOTSPOT_JNI_GETOBJECTFIELD_RETURN(ret);
1794 return ret;
1795 JNI_END
1796
1797
1798
1799 #define DEFINE_GETFIELD(Return,Fieldname,Result \
1800 , EntryProbe, ReturnProbe) \
1801 \
1802 DT_RETURN_MARK_DECL_FOR(Result, Get##Result##Field, Return \
1803 , ReturnProbe); \
1804 \
1805 JNI_ENTRY_NO_PRESERVE(Return, jni_Get##Result##Field(JNIEnv *env, jobject obj, jfieldID fieldID)) \
1806 \
1807 EntryProbe; \
1808 Return ret = 0;\
1809 DT_RETURN_MARK_FOR(Result, Get##Result##Field, Return, (const Return&)ret);\
1810 \
1811 oop o = JNIHandles::resolve_non_null(obj); \
1812 Klass* k = o->klass(); \
1813 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID); \
1814 /* Keep JVMTI addition small and only check enabled flag here. */ \
1815 if (JvmtiExport::should_post_field_access()) { \
1816 o = JvmtiExport::jni_GetField_probe(thread, obj, o, k, fieldID, false); \
1817 } \
1818 ret = o->Fieldname##_field(offset); \
1819 return ret; \
1820 JNI_END
1821
1822 DEFINE_GETFIELD(jboolean, bool, Boolean
1823 , HOTSPOT_JNI_GETBOOLEANFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
1824 HOTSPOT_JNI_GETBOOLEANFIELD_RETURN(_ret_ref))
1825 DEFINE_GETFIELD(jbyte, byte, Byte
1826 , HOTSPOT_JNI_GETBYTEFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
1827 HOTSPOT_JNI_GETBYTEFIELD_RETURN(_ret_ref))
1828 DEFINE_GETFIELD(jchar, char, Char
1829 , HOTSPOT_JNI_GETCHARFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
1830 HOTSPOT_JNI_GETCHARFIELD_RETURN(_ret_ref))
1831 DEFINE_GETFIELD(jshort, short, Short
1832 , HOTSPOT_JNI_GETSHORTFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
1833 HOTSPOT_JNI_GETSHORTFIELD_RETURN(_ret_ref))
1834 DEFINE_GETFIELD(jint, int, Int
1835 , HOTSPOT_JNI_GETINTFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
1836 HOTSPOT_JNI_GETINTFIELD_RETURN(_ret_ref))
1837 DEFINE_GETFIELD(jlong, long, Long
1838 , HOTSPOT_JNI_GETLONGFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
1839 HOTSPOT_JNI_GETLONGFIELD_RETURN(_ret_ref))
1840 // Float and double probes don't return value because dtrace doesn't currently support it
1841 DEFINE_GETFIELD(jfloat, float, Float
1842 , HOTSPOT_JNI_GETFLOATFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
1843 HOTSPOT_JNI_GETFLOATFIELD_RETURN())
1844 DEFINE_GETFIELD(jdouble, double, Double
1845 , HOTSPOT_JNI_GETDOUBLEFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
1846 HOTSPOT_JNI_GETDOUBLEFIELD_RETURN())
1847
jni_GetBooleanField_addr()1848 address jni_GetBooleanField_addr() {
1849 return (address)jni_GetBooleanField;
1850 }
jni_GetByteField_addr()1851 address jni_GetByteField_addr() {
1852 return (address)jni_GetByteField;
1853 }
jni_GetCharField_addr()1854 address jni_GetCharField_addr() {
1855 return (address)jni_GetCharField;
1856 }
jni_GetShortField_addr()1857 address jni_GetShortField_addr() {
1858 return (address)jni_GetShortField;
1859 }
jni_GetIntField_addr()1860 address jni_GetIntField_addr() {
1861 return (address)jni_GetIntField;
1862 }
jni_GetLongField_addr()1863 address jni_GetLongField_addr() {
1864 return (address)jni_GetLongField;
1865 }
jni_GetFloatField_addr()1866 address jni_GetFloatField_addr() {
1867 return (address)jni_GetFloatField;
1868 }
jni_GetDoubleField_addr()1869 address jni_GetDoubleField_addr() {
1870 return (address)jni_GetDoubleField;
1871 }
1872
1873 JNI_ENTRY_NO_PRESERVE(void, jni_SetObjectField(JNIEnv *env, jobject obj, jfieldID fieldID, jobject value))
1874 HOTSPOT_JNI_SETOBJECTFIELD_ENTRY(env, obj, (uintptr_t) fieldID, value);
1875 oop o = JNIHandles::resolve_non_null(obj);
1876 Klass* k = o->klass();
1877 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID);
1878 // Keep JVMTI addition small and only check enabled flag here.
1879 if (JvmtiExport::should_post_field_modification()) {
1880 jvalue field_value;
1881 field_value.l = value;
1882 o = JvmtiExport::jni_SetField_probe(thread, obj, o, k, fieldID, false, JVM_SIGNATURE_CLASS, (jvalue *)&field_value);
1883 }
1884 HeapAccess<ON_UNKNOWN_OOP_REF>::oop_store_at(o, offset, JNIHandles::resolve(value));
1885 HOTSPOT_JNI_SETOBJECTFIELD_RETURN();
1886 JNI_END
1887
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 if (SigType == JVM_SIGNATURE_BOOLEAN) { value = ((jboolean)value) & 1; } \
1906 o->Fieldname##_field_put(offset, value); \
1907 ReturnProbe; \
1908 JNI_END
1909
1910 DEFINE_SETFIELD(jboolean, bool, Boolean, JVM_SIGNATURE_BOOLEAN, z
1911 , HOTSPOT_JNI_SETBOOLEANFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value),
1912 HOTSPOT_JNI_SETBOOLEANFIELD_RETURN())
1913 DEFINE_SETFIELD(jbyte, byte, Byte, JVM_SIGNATURE_BYTE, b
1914 , HOTSPOT_JNI_SETBYTEFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value),
1915 HOTSPOT_JNI_SETBYTEFIELD_RETURN())
1916 DEFINE_SETFIELD(jchar, char, Char, JVM_SIGNATURE_CHAR, c
1917 , HOTSPOT_JNI_SETCHARFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value),
1918 HOTSPOT_JNI_SETCHARFIELD_RETURN())
1919 DEFINE_SETFIELD(jshort, short, Short, JVM_SIGNATURE_SHORT, s
1920 , HOTSPOT_JNI_SETSHORTFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value),
1921 HOTSPOT_JNI_SETSHORTFIELD_RETURN())
1922 DEFINE_SETFIELD(jint, int, Int, JVM_SIGNATURE_INT, i
1923 , HOTSPOT_JNI_SETINTFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value),
1924 HOTSPOT_JNI_SETINTFIELD_RETURN())
1925 DEFINE_SETFIELD(jlong, long, Long, JVM_SIGNATURE_LONG, j
1926 , HOTSPOT_JNI_SETLONGFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value),
1927 HOTSPOT_JNI_SETLONGFIELD_RETURN())
1928 // Float and double probes don't return value because dtrace doesn't currently support it
1929 DEFINE_SETFIELD(jfloat, float, Float, JVM_SIGNATURE_FLOAT, f
1930 , HOTSPOT_JNI_SETFLOATFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
1931 HOTSPOT_JNI_SETFLOATFIELD_RETURN())
1932 DEFINE_SETFIELD(jdouble, double, Double, JVM_SIGNATURE_DOUBLE, d
1933 , HOTSPOT_JNI_SETDOUBLEFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
1934 HOTSPOT_JNI_SETDOUBLEFIELD_RETURN())
1935
1936 DT_RETURN_MARK_DECL(ToReflectedField, jobject
1937 , HOTSPOT_JNI_TOREFLECTEDFIELD_RETURN(_ret_ref));
1938
1939 JNI_ENTRY(jobject, jni_ToReflectedField(JNIEnv *env, jclass cls, jfieldID fieldID, jboolean isStatic))
1940 HOTSPOT_JNI_TOREFLECTEDFIELD_ENTRY(env, cls, (uintptr_t) fieldID, isStatic);
1941 jobject ret = NULL;
1942 DT_RETURN_MARK(ToReflectedField, jobject, (const jobject&)ret);
1943
1944 fieldDescriptor fd;
1945 bool found = false;
1946 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
1947
1948 assert(jfieldIDWorkaround::is_static_jfieldID(fieldID) == (isStatic != 0), "invalid fieldID");
1949
1950 if (isStatic) {
1951 // Static field. The fieldID a JNIid specifying the field holder and the offset within the Klass*.
1952 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID);
1953 assert(id->is_static_field_id(), "invalid static field id");
1954 found = id->find_local_field(&fd);
1955 } else {
1956 // Non-static field. The fieldID is really the offset of the field within the instanceOop.
1957 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID);
1958 found = InstanceKlass::cast(k)->find_field_from_offset(offset, false, &fd);
1959 }
1960 assert(found, "bad fieldID passed into jni_ToReflectedField");
1961 oop reflected = Reflection::new_field(&fd, CHECK_NULL);
1962 ret = JNIHandles::make_local(THREAD, reflected);
1963 return ret;
1964 JNI_END
1965
1966
1967 //
1968 // Accessing Static Fields
1969 //
1970 DT_RETURN_MARK_DECL(GetStaticFieldID, jfieldID
1971 , HOTSPOT_JNI_GETSTATICFIELDID_RETURN((uintptr_t)_ret_ref));
1972
1973 JNI_ENTRY(jfieldID, jni_GetStaticFieldID(JNIEnv *env, jclass clazz,
1974 const char *name, const char *sig))
1975 HOTSPOT_JNI_GETSTATICFIELDID_ENTRY(env, clazz, (char *) name, (char *) sig);
1976 jfieldID ret = NULL;
1977 DT_RETURN_MARK(GetStaticFieldID, jfieldID, (const jfieldID&)ret);
1978
1979 // The class should have been loaded (we have an instance of the class
1980 // passed in) so the field and signature should already be in the symbol
1981 // table. If they're not there, the field doesn't exist.
1982 TempNewSymbol fieldname = SymbolTable::probe(name, (int)strlen(name));
1983 TempNewSymbol signame = SymbolTable::probe(sig, (int)strlen(sig));
1984 if (fieldname == NULL || signame == NULL) {
1985 THROW_MSG_0(vmSymbols::java_lang_NoSuchFieldError(), (char*) name);
1986 }
1987 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz));
1988 // Make sure class is initialized before handing id's out to static fields
1989 k->initialize(CHECK_NULL);
1990
1991 fieldDescriptor fd;
1992 if (!k->is_instance_klass() ||
1993 !InstanceKlass::cast(k)->find_field(fieldname, signame, true, &fd)) {
1994 THROW_MSG_0(vmSymbols::java_lang_NoSuchFieldError(), (char*) name);
1995 }
1996
1997 // A jfieldID for a static field is a JNIid specifying the field holder and the offset within the Klass*
1998 JNIid* id = fd.field_holder()->jni_id_for(fd.offset());
1999 debug_only(id->set_is_static_field_id();)
2000
2001 debug_only(id->verify(fd.field_holder()));
2002
2003 ret = jfieldIDWorkaround::to_static_jfieldID(id);
2004 return ret;
2005 JNI_END
2006
2007
2008 JNI_ENTRY(jobject, jni_GetStaticObjectField(JNIEnv *env, jclass clazz, jfieldID fieldID))
2009 HOTSPOT_JNI_GETSTATICOBJECTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID);
2010 #if INCLUDE_JNI_CHECK
2011 DEBUG_ONLY(Klass* param_k = jniCheck::validate_class(thread, clazz);)
2012 #endif // INCLUDE_JNI_CHECK
2013 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID);
2014 assert(id->is_static_field_id(), "invalid static field id");
2015 // Keep JVMTI addition small and only check enabled flag here.
2016 // jni_GetField_probe() assumes that is okay to create handles.
2017 if (JvmtiExport::should_post_field_access()) {
2018 JvmtiExport::jni_GetField_probe(thread, NULL, NULL, id->holder(), fieldID, true);
2019 }
2020 jobject ret = JNIHandles::make_local(THREAD, id->holder()->java_mirror()->obj_field(id->offset()));
2021 HOTSPOT_JNI_GETSTATICOBJECTFIELD_RETURN(ret);
2022 return ret;
2023 JNI_END
2024
2025
2026 #define DEFINE_GETSTATICFIELD(Return,Fieldname,Result \
2027 , EntryProbe, ReturnProbe) \
2028 \
2029 DT_RETURN_MARK_DECL_FOR(Result, GetStatic##Result##Field, Return \
2030 , ReturnProbe); \
2031 \
2032 JNI_ENTRY(Return, jni_GetStatic##Result##Field(JNIEnv *env, jclass clazz, jfieldID fieldID)) \
2033 EntryProbe; \
2034 Return ret = 0;\
2035 DT_RETURN_MARK_FOR(Result, GetStatic##Result##Field, Return, \
2036 (const Return&)ret);\
2037 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID); \
2038 assert(id->is_static_field_id(), "invalid static field id"); \
2039 /* Keep JVMTI addition small and only check enabled flag here. */ \
2040 /* jni_GetField_probe() assumes that is okay to create handles. */ \
2041 if (JvmtiExport::should_post_field_access()) { \
2042 JvmtiExport::jni_GetField_probe(thread, NULL, NULL, id->holder(), fieldID, true); \
2043 } \
2044 ret = id->holder()->java_mirror()-> Fieldname##_field (id->offset()); \
2045 return ret;\
2046 JNI_END
2047
2048 DEFINE_GETSTATICFIELD(jboolean, bool, Boolean
2049 , HOTSPOT_JNI_GETSTATICBOOLEANFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICBOOLEANFIELD_RETURN(_ret_ref))
2050 DEFINE_GETSTATICFIELD(jbyte, byte, Byte
2051 , HOTSPOT_JNI_GETSTATICBYTEFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICBYTEFIELD_RETURN(_ret_ref) )
2052 DEFINE_GETSTATICFIELD(jchar, char, Char
2053 , HOTSPOT_JNI_GETSTATICCHARFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICCHARFIELD_RETURN(_ret_ref) )
2054 DEFINE_GETSTATICFIELD(jshort, short, Short
2055 , HOTSPOT_JNI_GETSTATICSHORTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICSHORTFIELD_RETURN(_ret_ref) )
2056 DEFINE_GETSTATICFIELD(jint, int, Int
2057 , HOTSPOT_JNI_GETSTATICINTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICINTFIELD_RETURN(_ret_ref) )
2058 DEFINE_GETSTATICFIELD(jlong, long, Long
2059 , HOTSPOT_JNI_GETSTATICLONGFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICLONGFIELD_RETURN(_ret_ref) )
2060 // Float and double probes don't return value because dtrace doesn't currently support it
2061 DEFINE_GETSTATICFIELD(jfloat, float, Float
2062 , HOTSPOT_JNI_GETSTATICFLOATFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICFLOATFIELD_RETURN() )
2063 DEFINE_GETSTATICFIELD(jdouble, double, Double
2064 , HOTSPOT_JNI_GETSTATICDOUBLEFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICDOUBLEFIELD_RETURN() )
2065
2066 JNI_ENTRY(void, jni_SetStaticObjectField(JNIEnv *env, jclass clazz, jfieldID fieldID, jobject value))
2067 HOTSPOT_JNI_SETSTATICOBJECTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value);
2068 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID);
2069 assert(id->is_static_field_id(), "invalid static field id");
2070 // Keep JVMTI addition small and only check enabled flag here.
2071 // jni_SetField_probe() assumes that is okay to create handles.
2072 if (JvmtiExport::should_post_field_modification()) {
2073 jvalue field_value;
2074 field_value.l = value;
2075 JvmtiExport::jni_SetField_probe(thread, NULL, NULL, id->holder(), fieldID, true, JVM_SIGNATURE_CLASS, (jvalue *)&field_value);
2076 }
2077 id->holder()->java_mirror()->obj_field_put(id->offset(), JNIHandles::resolve(value));
2078 HOTSPOT_JNI_SETSTATICOBJECTFIELD_RETURN();
2079 JNI_END
2080
2081
2082
2083 #define DEFINE_SETSTATICFIELD(Argument,Fieldname,Result,SigType,unionType \
2084 , EntryProbe, ReturnProbe) \
2085 \
2086 JNI_ENTRY(void, jni_SetStatic##Result##Field(JNIEnv *env, jclass clazz, jfieldID fieldID, Argument value)) \
2087 EntryProbe; \
2088 \
2089 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID); \
2090 assert(id->is_static_field_id(), "invalid static field id"); \
2091 /* Keep JVMTI addition small and only check enabled flag here. */ \
2092 /* jni_SetField_probe() assumes that is okay to create handles. */ \
2093 if (JvmtiExport::should_post_field_modification()) { \
2094 jvalue field_value; \
2095 field_value.unionType = value; \
2096 JvmtiExport::jni_SetField_probe(thread, NULL, NULL, id->holder(), fieldID, true, SigType, (jvalue *)&field_value); \
2097 } \
2098 if (SigType == JVM_SIGNATURE_BOOLEAN) { value = ((jboolean)value) & 1; } \
2099 id->holder()->java_mirror()-> Fieldname##_field_put (id->offset(), value); \
2100 ReturnProbe;\
2101 JNI_END
2102
2103 DEFINE_SETSTATICFIELD(jboolean, bool, Boolean, JVM_SIGNATURE_BOOLEAN, z
2104 , HOTSPOT_JNI_SETSTATICBOOLEANFIELD_ENTRY(env, clazz, (uintptr_t)fieldID, value),
2105 HOTSPOT_JNI_SETSTATICBOOLEANFIELD_RETURN())
2106 DEFINE_SETSTATICFIELD(jbyte, byte, Byte, JVM_SIGNATURE_BYTE, b
2107 , HOTSPOT_JNI_SETSTATICBYTEFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value),
2108 HOTSPOT_JNI_SETSTATICBYTEFIELD_RETURN())
2109 DEFINE_SETSTATICFIELD(jchar, char, Char, JVM_SIGNATURE_CHAR, c
2110 , HOTSPOT_JNI_SETSTATICCHARFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value),
2111 HOTSPOT_JNI_SETSTATICCHARFIELD_RETURN())
2112 DEFINE_SETSTATICFIELD(jshort, short, Short, JVM_SIGNATURE_SHORT, s
2113 , HOTSPOT_JNI_SETSTATICSHORTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value),
2114 HOTSPOT_JNI_SETSTATICSHORTFIELD_RETURN())
2115 DEFINE_SETSTATICFIELD(jint, int, Int, JVM_SIGNATURE_INT, i
2116 , HOTSPOT_JNI_SETSTATICINTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value),
2117 HOTSPOT_JNI_SETSTATICINTFIELD_RETURN())
2118 DEFINE_SETSTATICFIELD(jlong, long, Long, JVM_SIGNATURE_LONG, j
2119 , HOTSPOT_JNI_SETSTATICLONGFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value),
2120 HOTSPOT_JNI_SETSTATICLONGFIELD_RETURN())
2121 // Float and double probes don't return value because dtrace doesn't currently support it
2122 DEFINE_SETSTATICFIELD(jfloat, float, Float, JVM_SIGNATURE_FLOAT, f
2123 , HOTSPOT_JNI_SETSTATICFLOATFIELD_ENTRY(env, clazz, (uintptr_t) fieldID),
2124 HOTSPOT_JNI_SETSTATICFLOATFIELD_RETURN())
2125 DEFINE_SETSTATICFIELD(jdouble, double, Double, JVM_SIGNATURE_DOUBLE, d
2126 , HOTSPOT_JNI_SETSTATICDOUBLEFIELD_ENTRY(env, clazz, (uintptr_t) fieldID),
2127 HOTSPOT_JNI_SETSTATICDOUBLEFIELD_RETURN())
2128
2129 //
2130 // String Operations
2131 //
2132
2133 // Unicode Interface
2134
2135 DT_RETURN_MARK_DECL(NewString, jstring
2136 , HOTSPOT_JNI_NEWSTRING_RETURN(_ret_ref));
2137
2138 JNI_ENTRY(jstring, jni_NewString(JNIEnv *env, const jchar *unicodeChars, jsize len))
2139 HOTSPOT_JNI_NEWSTRING_ENTRY(env, (uint16_t *) unicodeChars, len);
2140 jstring ret = NULL;
2141 DT_RETURN_MARK(NewString, jstring, (const jstring&)ret);
2142 oop string=java_lang_String::create_oop_from_unicode((jchar*) unicodeChars, len, CHECK_NULL);
2143 ret = (jstring) JNIHandles::make_local(THREAD, string);
2144 return ret;
2145 JNI_END
2146
2147
2148 JNI_ENTRY_NO_PRESERVE(jsize, jni_GetStringLength(JNIEnv *env, jstring string))
2149 HOTSPOT_JNI_GETSTRINGLENGTH_ENTRY(env, string);
2150 jsize ret = 0;
2151 oop s = JNIHandles::resolve_non_null(string);
2152 ret = java_lang_String::length(s);
2153 HOTSPOT_JNI_GETSTRINGLENGTH_RETURN(ret);
2154 return ret;
2155 JNI_END
2156
2157
2158 JNI_ENTRY_NO_PRESERVE(const jchar*, jni_GetStringChars(
2159 JNIEnv *env, jstring string, jboolean *isCopy))
2160 HOTSPOT_JNI_GETSTRINGCHARS_ENTRY(env, string, (uintptr_t *) isCopy);
2161 jchar* buf = NULL;
2162 oop s = JNIHandles::resolve_non_null(string);
2163 typeArrayOop s_value = java_lang_String::value(s);
2164 if (s_value != NULL) {
2165 int s_len = java_lang_String::length(s, s_value);
2166 bool is_latin1 = java_lang_String::is_latin1(s);
2167 buf = NEW_C_HEAP_ARRAY_RETURN_NULL(jchar, s_len + 1, mtInternal); // add one for zero termination
2168 /* JNI Specification states return NULL on OOM */
2169 if (buf != NULL) {
2170 if (s_len > 0) {
2171 if (!is_latin1) {
2172 ArrayAccess<>::arraycopy_to_native(s_value, (size_t) typeArrayOopDesc::element_offset<jchar>(0),
2173 buf, s_len);
2174 } else {
2175 for (int i = 0; i < s_len; i++) {
2176 buf[i] = ((jchar) s_value->byte_at(i)) & 0xff;
2177 }
2178 }
2179 }
2180 buf[s_len] = 0;
2181 //%note jni_5
2182 if (isCopy != NULL) {
2183 *isCopy = JNI_TRUE;
2184 }
2185 }
2186 }
2187 HOTSPOT_JNI_GETSTRINGCHARS_RETURN(buf);
2188 return buf;
2189 JNI_END
2190
2191
2192 JNI_ENTRY_NO_PRESERVE(void, jni_ReleaseStringChars(JNIEnv *env, jstring str, const jchar *chars))
2193 HOTSPOT_JNI_RELEASESTRINGCHARS_ENTRY(env, str, (uint16_t *) chars);
2194 //%note jni_6
2195 if (chars != NULL) {
2196 // Since String objects are supposed to be immutable, don't copy any
2197 // new data back. A bad user will have to go after the char array.
2198 FreeHeap((void*) chars);
2199 }
2200 HOTSPOT_JNI_RELEASESTRINGCHARS_RETURN();
2201 JNI_END
2202
2203
2204 // UTF Interface
2205
2206 DT_RETURN_MARK_DECL(NewStringUTF, jstring
2207 , HOTSPOT_JNI_NEWSTRINGUTF_RETURN(_ret_ref));
2208
2209 JNI_ENTRY(jstring, jni_NewStringUTF(JNIEnv *env, const char *bytes))
2210 HOTSPOT_JNI_NEWSTRINGUTF_ENTRY(env, (char *) bytes);
2211 jstring ret;
2212 DT_RETURN_MARK(NewStringUTF, jstring, (const jstring&)ret);
2213
2214 oop result = java_lang_String::create_oop_from_str((char*) bytes, CHECK_NULL);
2215 ret = (jstring) JNIHandles::make_local(THREAD, result);
2216 return ret;
2217 JNI_END
2218
2219
2220 JNI_ENTRY(jsize, jni_GetStringUTFLength(JNIEnv *env, jstring string))
2221 HOTSPOT_JNI_GETSTRINGUTFLENGTH_ENTRY(env, string);
2222 oop java_string = JNIHandles::resolve_non_null(string);
2223 jsize ret = java_lang_String::utf8_length(java_string);
2224 HOTSPOT_JNI_GETSTRINGUTFLENGTH_RETURN(ret);
2225 return ret;
2226 JNI_END
2227
2228
2229 JNI_ENTRY(const char*, jni_GetStringUTFChars(JNIEnv *env, jstring string, jboolean *isCopy))
2230 HOTSPOT_JNI_GETSTRINGUTFCHARS_ENTRY(env, string, (uintptr_t *) isCopy);
2231 char* result = NULL;
2232 oop java_string = JNIHandles::resolve_non_null(string);
2233 typeArrayOop s_value = java_lang_String::value(java_string);
2234 if (s_value != NULL) {
2235 size_t length = java_lang_String::utf8_length(java_string, s_value);
2236 /* JNI Specification states return NULL on OOM */
2237 result = AllocateHeap(length + 1, mtInternal, 0, AllocFailStrategy::RETURN_NULL);
2238 if (result != NULL) {
2239 java_lang_String::as_utf8_string(java_string, s_value, result, (int) length + 1);
2240 if (isCopy != NULL) {
2241 *isCopy = JNI_TRUE;
2242 }
2243 }
2244 }
2245 HOTSPOT_JNI_GETSTRINGUTFCHARS_RETURN(result);
2246 return result;
2247 JNI_END
2248
2249
2250 JNI_LEAF(void, jni_ReleaseStringUTFChars(JNIEnv *env, jstring str, const char *chars))
2251 HOTSPOT_JNI_RELEASESTRINGUTFCHARS_ENTRY(env, str, (char *) chars);
2252 if (chars != NULL) {
2253 FreeHeap((char*) chars);
2254 }
2255 HOTSPOT_JNI_RELEASESTRINGUTFCHARS_RETURN();
2256 JNI_END
2257
2258
2259 JNI_ENTRY_NO_PRESERVE(jsize, jni_GetArrayLength(JNIEnv *env, jarray array))
2260 HOTSPOT_JNI_GETARRAYLENGTH_ENTRY(env, array);
2261 arrayOop a = arrayOop(JNIHandles::resolve_non_null(array));
2262 assert(a->is_array(), "must be array");
2263 jsize ret = a->length();
2264 HOTSPOT_JNI_GETARRAYLENGTH_RETURN(ret);
2265 return ret;
2266 JNI_END
2267
2268
2269 //
2270 // Object Array Operations
2271 //
2272
2273 DT_RETURN_MARK_DECL(NewObjectArray, jobjectArray
2274 , HOTSPOT_JNI_NEWOBJECTARRAY_RETURN(_ret_ref));
2275
2276 JNI_ENTRY(jobjectArray, jni_NewObjectArray(JNIEnv *env, jsize length, jclass elementClass, jobject initialElement))
2277 HOTSPOT_JNI_NEWOBJECTARRAY_ENTRY(env, length, elementClass, initialElement);
2278 jobjectArray ret = NULL;
2279 DT_RETURN_MARK(NewObjectArray, jobjectArray, (const jobjectArray&)ret);
2280 Klass* ek = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(elementClass));
2281 Klass* ak = ek->array_klass(CHECK_NULL);
2282 ObjArrayKlass::cast(ak)->initialize(CHECK_NULL);
2283 objArrayOop result = ObjArrayKlass::cast(ak)->allocate(length, CHECK_NULL);
2284 oop initial_value = JNIHandles::resolve(initialElement);
2285 if (initial_value != NULL) { // array already initialized with NULL
2286 for (int index = 0; index < length; index++) {
2287 result->obj_at_put(index, initial_value);
2288 }
2289 }
2290 ret = (jobjectArray) JNIHandles::make_local(THREAD, result);
2291 return ret;
2292 JNI_END
2293
2294 DT_RETURN_MARK_DECL(GetObjectArrayElement, jobject
2295 , HOTSPOT_JNI_GETOBJECTARRAYELEMENT_RETURN(_ret_ref));
2296
2297 JNI_ENTRY(jobject, jni_GetObjectArrayElement(JNIEnv *env, jobjectArray array, jsize index))
2298 HOTSPOT_JNI_GETOBJECTARRAYELEMENT_ENTRY(env, array, index);
2299 jobject ret = NULL;
2300 DT_RETURN_MARK(GetObjectArrayElement, jobject, (const jobject&)ret);
2301 objArrayOop a = objArrayOop(JNIHandles::resolve_non_null(array));
2302 if (a->is_within_bounds(index)) {
2303 ret = JNIHandles::make_local(THREAD, a->obj_at(index));
2304 return ret;
2305 } else {
2306 ResourceMark rm(THREAD);
2307 stringStream ss;
2308 ss.print("Index %d out of bounds for length %d", index, a->length());
2309 THROW_MSG_0(vmSymbols::java_lang_ArrayIndexOutOfBoundsException(), ss.as_string());
2310 }
2311 JNI_END
2312
2313 DT_VOID_RETURN_MARK_DECL(SetObjectArrayElement
2314 , HOTSPOT_JNI_SETOBJECTARRAYELEMENT_RETURN());
2315
2316 JNI_ENTRY(void, jni_SetObjectArrayElement(JNIEnv *env, jobjectArray array, jsize index, jobject value))
2317 HOTSPOT_JNI_SETOBJECTARRAYELEMENT_ENTRY(env, array, index, value);
2318 DT_VOID_RETURN_MARK(SetObjectArrayElement);
2319
2320 objArrayOop a = objArrayOop(JNIHandles::resolve_non_null(array));
2321 oop v = JNIHandles::resolve(value);
2322 if (a->is_within_bounds(index)) {
2323 if (v == NULL || v->is_a(ObjArrayKlass::cast(a->klass())->element_klass())) {
2324 a->obj_at_put(index, v);
2325 } else {
2326 ResourceMark rm(THREAD);
2327 stringStream ss;
2328 Klass *bottom_kl = ObjArrayKlass::cast(a->klass())->bottom_klass();
2329 ss.print("type mismatch: can not store %s to %s[%d]",
2330 v->klass()->external_name(),
2331 bottom_kl->is_typeArray_klass() ? type2name_tab[ArrayKlass::cast(bottom_kl)->element_type()] : bottom_kl->external_name(),
2332 index);
2333 for (int dims = ArrayKlass::cast(a->klass())->dimension(); dims > 1; --dims) {
2334 ss.print("[]");
2335 }
2336 THROW_MSG(vmSymbols::java_lang_ArrayStoreException(), ss.as_string());
2337 }
2338 } else {
2339 ResourceMark rm(THREAD);
2340 stringStream ss;
2341 ss.print("Index %d out of bounds for length %d", index, a->length());
2342 THROW_MSG(vmSymbols::java_lang_ArrayIndexOutOfBoundsException(), ss.as_string());
2343 }
2344 JNI_END
2345
2346
2347
2348 #define DEFINE_NEWSCALARARRAY(Return,Allocator,Result \
2349 ,EntryProbe,ReturnProbe) \
2350 \
2351 DT_RETURN_MARK_DECL(New##Result##Array, Return \
2352 , ReturnProbe); \
2353 \
2354 JNI_ENTRY(Return, \
2355 jni_New##Result##Array(JNIEnv *env, jsize len)) \
2356 EntryProbe; \
2357 Return ret = NULL;\
2358 DT_RETURN_MARK(New##Result##Array, Return, (const Return&)ret);\
2359 \
2360 oop obj= oopFactory::Allocator(len, CHECK_NULL); \
2361 ret = (Return) JNIHandles::make_local(THREAD, obj); \
2362 return ret;\
2363 JNI_END
2364
DEFINE_NEWSCALARARRAY(jbooleanArray,new_boolArray,Boolean,HOTSPOT_JNI_NEWBOOLEANARRAY_ENTRY (env,len),HOTSPOT_JNI_NEWBOOLEANARRAY_RETURN (_ret_ref))2365 DEFINE_NEWSCALARARRAY(jbooleanArray, new_boolArray, Boolean,
2366 HOTSPOT_JNI_NEWBOOLEANARRAY_ENTRY(env, len),
2367 HOTSPOT_JNI_NEWBOOLEANARRAY_RETURN(_ret_ref))
2368 DEFINE_NEWSCALARARRAY(jbyteArray, new_byteArray, Byte,
2369 HOTSPOT_JNI_NEWBYTEARRAY_ENTRY(env, len),
2370 HOTSPOT_JNI_NEWBYTEARRAY_RETURN(_ret_ref))
2371 DEFINE_NEWSCALARARRAY(jshortArray, new_shortArray, Short,
2372 HOTSPOT_JNI_NEWSHORTARRAY_ENTRY(env, len),
2373 HOTSPOT_JNI_NEWSHORTARRAY_RETURN(_ret_ref))
2374 DEFINE_NEWSCALARARRAY(jcharArray, new_charArray, Char,
2375 HOTSPOT_JNI_NEWCHARARRAY_ENTRY(env, len),
2376 HOTSPOT_JNI_NEWCHARARRAY_RETURN(_ret_ref))
2377 DEFINE_NEWSCALARARRAY(jintArray, new_intArray, Int,
2378 HOTSPOT_JNI_NEWINTARRAY_ENTRY(env, len),
2379 HOTSPOT_JNI_NEWINTARRAY_RETURN(_ret_ref))
2380 DEFINE_NEWSCALARARRAY(jlongArray, new_longArray, Long,
2381 HOTSPOT_JNI_NEWLONGARRAY_ENTRY(env, len),
2382 HOTSPOT_JNI_NEWLONGARRAY_RETURN(_ret_ref))
2383 DEFINE_NEWSCALARARRAY(jfloatArray, new_floatArray, Float,
2384 HOTSPOT_JNI_NEWFLOATARRAY_ENTRY(env, len),
2385 HOTSPOT_JNI_NEWFLOATARRAY_RETURN(_ret_ref))
2386 DEFINE_NEWSCALARARRAY(jdoubleArray, new_doubleArray, Double,
2387 HOTSPOT_JNI_NEWDOUBLEARRAY_ENTRY(env, len),
2388 HOTSPOT_JNI_NEWDOUBLEARRAY_RETURN(_ret_ref))
2389
2390 // Return an address which will fault if the caller writes to it.
2391
2392 static char* get_bad_address() {
2393 static char* bad_address = NULL;
2394 if (bad_address == NULL) {
2395 size_t size = os::vm_allocation_granularity();
2396 bad_address = os::reserve_memory(size);
2397 if (bad_address != NULL) {
2398 os::protect_memory(bad_address, size, os::MEM_PROT_READ,
2399 /*is_committed*/false);
2400 MemTracker::record_virtual_memory_type((void*)bad_address, mtInternal);
2401 }
2402 }
2403 return bad_address;
2404 }
2405
2406
2407
2408 #define DEFINE_GETSCALARARRAYELEMENTS(ElementTag,ElementType,Result, Tag \
2409 , EntryProbe, ReturnProbe) \
2410 \
2411 JNI_ENTRY_NO_PRESERVE(ElementType*, \
2412 jni_Get##Result##ArrayElements(JNIEnv *env, ElementType##Array array, jboolean *isCopy)) \
2413 EntryProbe; \
2414 /* allocate an chunk of memory in c land */ \
2415 typeArrayOop a = typeArrayOop(JNIHandles::resolve_non_null(array)); \
2416 ElementType* result; \
2417 int len = a->length(); \
2418 if (len == 0) { \
2419 if (isCopy != NULL) { \
2420 *isCopy = JNI_FALSE; \
2421 } \
2422 /* Empty array: legal but useless, can't return NULL. \
2423 * Return a pointer to something useless. \
2424 * Avoid asserts in typeArrayOop. */ \
2425 result = (ElementType*)get_bad_address(); \
2426 } else { \
2427 /* JNI Specification states return NULL on OOM */ \
2428 result = NEW_C_HEAP_ARRAY_RETURN_NULL(ElementType, len, mtInternal); \
2429 if (result != NULL) { \
2430 /* copy the array to the c chunk */ \
2431 ArrayAccess<>::arraycopy_to_native(a, typeArrayOopDesc::element_offset<ElementType>(0), \
2432 result, len); \
2433 if (isCopy) { \
2434 *isCopy = JNI_TRUE; \
2435 } \
2436 } \
2437 } \
2438 ReturnProbe; \
2439 return result; \
2440 JNI_END
2441
2442 DEFINE_GETSCALARARRAYELEMENTS(T_BOOLEAN, jboolean, Boolean, bool
2443 , HOTSPOT_JNI_GETBOOLEANARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy),
2444 HOTSPOT_JNI_GETBOOLEANARRAYELEMENTS_RETURN((uintptr_t*)result))
2445 DEFINE_GETSCALARARRAYELEMENTS(T_BYTE, jbyte, Byte, byte
2446 , HOTSPOT_JNI_GETBYTEARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy),
2447 HOTSPOT_JNI_GETBYTEARRAYELEMENTS_RETURN((char*)result))
2448 DEFINE_GETSCALARARRAYELEMENTS(T_SHORT, jshort, Short, short
2449 , HOTSPOT_JNI_GETSHORTARRAYELEMENTS_ENTRY(env, (uint16_t*) array, (uintptr_t *) isCopy),
2450 HOTSPOT_JNI_GETSHORTARRAYELEMENTS_RETURN((uint16_t*)result))
2451 DEFINE_GETSCALARARRAYELEMENTS(T_CHAR, jchar, Char, char
2452 , HOTSPOT_JNI_GETCHARARRAYELEMENTS_ENTRY(env, (uint16_t*) array, (uintptr_t *) isCopy),
2453 HOTSPOT_JNI_GETCHARARRAYELEMENTS_RETURN(result))
2454 DEFINE_GETSCALARARRAYELEMENTS(T_INT, jint, Int, int
2455 , HOTSPOT_JNI_GETINTARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy),
2456 HOTSPOT_JNI_GETINTARRAYELEMENTS_RETURN((uint32_t*)result))
2457 DEFINE_GETSCALARARRAYELEMENTS(T_LONG, jlong, Long, long
2458 , HOTSPOT_JNI_GETLONGARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy),
2459 HOTSPOT_JNI_GETLONGARRAYELEMENTS_RETURN(((uintptr_t*)result)))
2460 // Float and double probes don't return value because dtrace doesn't currently support it
2461 DEFINE_GETSCALARARRAYELEMENTS(T_FLOAT, jfloat, Float, float
2462 , HOTSPOT_JNI_GETFLOATARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy),
2463 HOTSPOT_JNI_GETFLOATARRAYELEMENTS_RETURN(result))
2464 DEFINE_GETSCALARARRAYELEMENTS(T_DOUBLE, jdouble, Double, double
2465 , HOTSPOT_JNI_GETDOUBLEARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy),
2466 HOTSPOT_JNI_GETDOUBLEARRAYELEMENTS_RETURN(result))
2467
2468
2469 #define DEFINE_RELEASESCALARARRAYELEMENTS(ElementTag,ElementType,Result,Tag \
2470 , EntryProbe, ReturnProbe);\
2471 \
2472 JNI_ENTRY_NO_PRESERVE(void, \
2473 jni_Release##Result##ArrayElements(JNIEnv *env, ElementType##Array array, \
2474 ElementType *buf, jint mode)) \
2475 EntryProbe; \
2476 typeArrayOop a = typeArrayOop(JNIHandles::resolve_non_null(array)); \
2477 int len = a->length(); \
2478 if (len != 0) { /* Empty array: nothing to free or copy. */ \
2479 if ((mode == 0) || (mode == JNI_COMMIT)) { \
2480 ArrayAccess<>::arraycopy_from_native(buf, a, typeArrayOopDesc::element_offset<ElementType>(0), len); \
2481 } \
2482 if ((mode == 0) || (mode == JNI_ABORT)) { \
2483 FreeHeap(buf); \
2484 } \
2485 } \
2486 ReturnProbe; \
2487 JNI_END
2488
2489 DEFINE_RELEASESCALARARRAYELEMENTS(T_BOOLEAN, jboolean, Boolean, bool
2490 , HOTSPOT_JNI_RELEASEBOOLEANARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) buf, mode),
2491 HOTSPOT_JNI_RELEASEBOOLEANARRAYELEMENTS_RETURN())
2492 DEFINE_RELEASESCALARARRAYELEMENTS(T_BYTE, jbyte, Byte, byte
2493 , HOTSPOT_JNI_RELEASEBYTEARRAYELEMENTS_ENTRY(env, array, (char *) buf, mode),
2494 HOTSPOT_JNI_RELEASEBYTEARRAYELEMENTS_RETURN())
2495 DEFINE_RELEASESCALARARRAYELEMENTS(T_SHORT, jshort, Short, short
2496 , HOTSPOT_JNI_RELEASESHORTARRAYELEMENTS_ENTRY(env, array, (uint16_t *) buf, mode),
2497 HOTSPOT_JNI_RELEASESHORTARRAYELEMENTS_RETURN())
2498 DEFINE_RELEASESCALARARRAYELEMENTS(T_CHAR, jchar, Char, char
2499 , HOTSPOT_JNI_RELEASECHARARRAYELEMENTS_ENTRY(env, array, (uint16_t *) buf, mode),
2500 HOTSPOT_JNI_RELEASECHARARRAYELEMENTS_RETURN())
2501 DEFINE_RELEASESCALARARRAYELEMENTS(T_INT, jint, Int, int
2502 , HOTSPOT_JNI_RELEASEINTARRAYELEMENTS_ENTRY(env, array, (uint32_t *) buf, mode),
2503 HOTSPOT_JNI_RELEASEINTARRAYELEMENTS_RETURN())
2504 DEFINE_RELEASESCALARARRAYELEMENTS(T_LONG, jlong, Long, long
2505 , HOTSPOT_JNI_RELEASELONGARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) buf, mode),
2506 HOTSPOT_JNI_RELEASELONGARRAYELEMENTS_RETURN())
2507 DEFINE_RELEASESCALARARRAYELEMENTS(T_FLOAT, jfloat, Float, float
2508 , HOTSPOT_JNI_RELEASEFLOATARRAYELEMENTS_ENTRY(env, array, (float *) buf, mode),
2509 HOTSPOT_JNI_RELEASEFLOATARRAYELEMENTS_RETURN())
2510 DEFINE_RELEASESCALARARRAYELEMENTS(T_DOUBLE, jdouble, Double, double
2511 , HOTSPOT_JNI_RELEASEDOUBLEARRAYELEMENTS_ENTRY(env, array, (double *) buf, mode),
2512 HOTSPOT_JNI_RELEASEDOUBLEARRAYELEMENTS_RETURN())
2513
check_bounds(jsize start,jsize copy_len,jsize array_len,TRAPS)2514 static void check_bounds(jsize start, jsize copy_len, jsize array_len, TRAPS) {
2515 ResourceMark rm(THREAD);
2516 if (copy_len < 0) {
2517 stringStream ss;
2518 ss.print("Length %d is negative", copy_len);
2519 THROW_MSG(vmSymbols::java_lang_ArrayIndexOutOfBoundsException(), ss.as_string());
2520 } else if (start < 0 || (start > array_len - copy_len)) {
2521 stringStream ss;
2522 ss.print("Array region %d.." INT64_FORMAT " out of bounds for length %d",
2523 start, (int64_t)start+(int64_t)copy_len, array_len);
2524 THROW_MSG(vmSymbols::java_lang_ArrayIndexOutOfBoundsException(), ss.as_string());
2525 }
2526 }
2527
2528 #define DEFINE_GETSCALARARRAYREGION(ElementTag,ElementType,Result, Tag \
2529 , EntryProbe, ReturnProbe); \
2530 DT_VOID_RETURN_MARK_DECL(Get##Result##ArrayRegion \
2531 , ReturnProbe); \
2532 \
2533 JNI_ENTRY(void, \
2534 jni_Get##Result##ArrayRegion(JNIEnv *env, ElementType##Array array, jsize start, \
2535 jsize len, ElementType *buf)) \
2536 EntryProbe; \
2537 DT_VOID_RETURN_MARK(Get##Result##ArrayRegion); \
2538 typeArrayOop src = typeArrayOop(JNIHandles::resolve_non_null(array)); \
2539 check_bounds(start, len, src->length(), CHECK); \
2540 if (len > 0) { \
2541 ArrayAccess<>::arraycopy_to_native(src, typeArrayOopDesc::element_offset<ElementType>(start), buf, len); \
2542 } \
2543 JNI_END
2544
2545 DEFINE_GETSCALARARRAYREGION(T_BOOLEAN, jboolean,Boolean, bool
2546 , HOTSPOT_JNI_GETBOOLEANARRAYREGION_ENTRY(env, array, start, len, (uintptr_t *) buf),
2547 HOTSPOT_JNI_GETBOOLEANARRAYREGION_RETURN());
2548 DEFINE_GETSCALARARRAYREGION(T_BYTE, jbyte, Byte, byte
2549 , HOTSPOT_JNI_GETBYTEARRAYREGION_ENTRY(env, array, start, len, (char *) buf),
2550 HOTSPOT_JNI_GETBYTEARRAYREGION_RETURN());
2551 DEFINE_GETSCALARARRAYREGION(T_SHORT, jshort, Short, short
2552 , HOTSPOT_JNI_GETSHORTARRAYREGION_ENTRY(env, array, start, len, (uint16_t *) buf),
2553 HOTSPOT_JNI_GETSHORTARRAYREGION_RETURN());
2554 DEFINE_GETSCALARARRAYREGION(T_CHAR, jchar, Char, char
2555 , HOTSPOT_JNI_GETCHARARRAYREGION_ENTRY(env, array, start, len, (uint16_t*) buf),
2556 HOTSPOT_JNI_GETCHARARRAYREGION_RETURN());
2557 DEFINE_GETSCALARARRAYREGION(T_INT, jint, Int, int
2558 , HOTSPOT_JNI_GETINTARRAYREGION_ENTRY(env, array, start, len, (uint32_t*) buf),
2559 HOTSPOT_JNI_GETINTARRAYREGION_RETURN());
2560 DEFINE_GETSCALARARRAYREGION(T_LONG, jlong, Long, long
2561 , HOTSPOT_JNI_GETLONGARRAYREGION_ENTRY(env, array, start, len, (uintptr_t *) buf),
2562 HOTSPOT_JNI_GETLONGARRAYREGION_RETURN());
2563 DEFINE_GETSCALARARRAYREGION(T_FLOAT, jfloat, Float, float
2564 , HOTSPOT_JNI_GETFLOATARRAYREGION_ENTRY(env, array, start, len, (float *) buf),
2565 HOTSPOT_JNI_GETFLOATARRAYREGION_RETURN());
2566 DEFINE_GETSCALARARRAYREGION(T_DOUBLE, jdouble, Double, double
2567 , HOTSPOT_JNI_GETDOUBLEARRAYREGION_ENTRY(env, array, start, len, (double *) buf),
2568 HOTSPOT_JNI_GETDOUBLEARRAYREGION_RETURN());
2569
2570
2571 #define DEFINE_SETSCALARARRAYREGION(ElementTag,ElementType,Result, Tag \
2572 , EntryProbe, ReturnProbe); \
2573 DT_VOID_RETURN_MARK_DECL(Set##Result##ArrayRegion \
2574 ,ReturnProbe); \
2575 \
2576 JNI_ENTRY(void, \
2577 jni_Set##Result##ArrayRegion(JNIEnv *env, ElementType##Array array, jsize start, \
2578 jsize len, const ElementType *buf)) \
2579 EntryProbe; \
2580 DT_VOID_RETURN_MARK(Set##Result##ArrayRegion); \
2581 typeArrayOop dst = typeArrayOop(JNIHandles::resolve_non_null(array)); \
2582 check_bounds(start, len, dst->length(), CHECK); \
2583 if (len > 0) { \
2584 ArrayAccess<>::arraycopy_from_native(buf, dst, typeArrayOopDesc::element_offset<ElementType>(start), len); \
2585 } \
2586 JNI_END
2587
2588 DEFINE_SETSCALARARRAYREGION(T_BOOLEAN, jboolean, Boolean, bool
2589 , HOTSPOT_JNI_SETBOOLEANARRAYREGION_ENTRY(env, array, start, len, (uintptr_t *)buf),
2590 HOTSPOT_JNI_SETBOOLEANARRAYREGION_RETURN())
2591 DEFINE_SETSCALARARRAYREGION(T_BYTE, jbyte, Byte, byte
2592 , HOTSPOT_JNI_SETBYTEARRAYREGION_ENTRY(env, array, start, len, (char *) buf),
2593 HOTSPOT_JNI_SETBYTEARRAYREGION_RETURN())
2594 DEFINE_SETSCALARARRAYREGION(T_SHORT, jshort, Short, short
2595 , HOTSPOT_JNI_SETSHORTARRAYREGION_ENTRY(env, array, start, len, (uint16_t *) buf),
2596 HOTSPOT_JNI_SETSHORTARRAYREGION_RETURN())
2597 DEFINE_SETSCALARARRAYREGION(T_CHAR, jchar, Char, char
2598 , HOTSPOT_JNI_SETCHARARRAYREGION_ENTRY(env, array, start, len, (uint16_t *) buf),
2599 HOTSPOT_JNI_SETCHARARRAYREGION_RETURN())
2600 DEFINE_SETSCALARARRAYREGION(T_INT, jint, Int, int
2601 , HOTSPOT_JNI_SETINTARRAYREGION_ENTRY(env, array, start, len, (uint32_t *) buf),
2602 HOTSPOT_JNI_SETINTARRAYREGION_RETURN())
2603 DEFINE_SETSCALARARRAYREGION(T_LONG, jlong, Long, long
2604 , HOTSPOT_JNI_SETLONGARRAYREGION_ENTRY(env, array, start, len, (uintptr_t *) buf),
2605 HOTSPOT_JNI_SETLONGARRAYREGION_RETURN())
2606 DEFINE_SETSCALARARRAYREGION(T_FLOAT, jfloat, Float, float
2607 , HOTSPOT_JNI_SETFLOATARRAYREGION_ENTRY(env, array, start, len, (float *) buf),
2608 HOTSPOT_JNI_SETFLOATARRAYREGION_RETURN())
2609 DEFINE_SETSCALARARRAYREGION(T_DOUBLE, jdouble, Double, double
2610 , HOTSPOT_JNI_SETDOUBLEARRAYREGION_ENTRY(env, array, start, len, (double *) buf),
2611 HOTSPOT_JNI_SETDOUBLEARRAYREGION_RETURN())
2612
2613
2614 DT_RETURN_MARK_DECL(RegisterNatives, jint
2615 , HOTSPOT_JNI_REGISTERNATIVES_RETURN(_ret_ref));
2616
2617 JNI_ENTRY(jint, jni_RegisterNatives(JNIEnv *env, jclass clazz,
2618 const JNINativeMethod *methods,
2619 jint nMethods))
2620 HOTSPOT_JNI_REGISTERNATIVES_ENTRY(env, clazz, (void *) methods, nMethods);
2621 jint ret = 0;
2622 DT_RETURN_MARK(RegisterNatives, jint, (const jint&)ret);
2623
2624 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz));
2625
2626 // There are no restrictions on native code registering native methods,
2627 // which allows agents to redefine the bindings to native methods, however
2628 // we issue a warning if any code running outside of the boot/platform
2629 // loader is rebinding any native methods in classes loaded by the
2630 // boot/platform loader that are in named modules. That will catch changes
2631 // to platform classes while excluding classes added to the bootclasspath.
2632 bool do_warning = false;
2633
2634 // Only instanceKlasses can have native methods
2635 if (k->is_instance_klass()) {
2636 oop cl = k->class_loader();
2637 InstanceKlass* ik = InstanceKlass::cast(k);
2638 // Check for a platform class
2639 if ((cl == NULL || SystemDictionary::is_platform_class_loader(cl)) &&
2640 ik->module()->is_named()) {
2641 Klass* caller = thread->security_get_caller_class(1);
2642 // If no caller class, or caller class has a different loader, then
2643 // issue a warning below.
2644 do_warning = (caller == NULL) || caller->class_loader() != cl;
2645 }
2646 }
2647
2648
2649 for (int index = 0; index < nMethods; index++) {
2650 const char* meth_name = methods[index].name;
2651 const char* meth_sig = methods[index].signature;
2652 int meth_name_len = (int)strlen(meth_name);
2653
2654 // The class should have been loaded (we have an instance of the class
2655 // passed in) so the method and signature should already be in the symbol
2656 // table. If they're not there, the method doesn't exist.
2657 TempNewSymbol name = SymbolTable::probe(meth_name, meth_name_len);
2658 TempNewSymbol signature = SymbolTable::probe(meth_sig, (int)strlen(meth_sig));
2659
2660 if (name == NULL || signature == NULL) {
2661 ResourceMark rm(THREAD);
2662 stringStream st;
2663 st.print("Method %s.%s%s not found", k->external_name(), meth_name, meth_sig);
2664 // Must return negative value on failure
2665 THROW_MSG_(vmSymbols::java_lang_NoSuchMethodError(), st.as_string(), -1);
2666 }
2667
2668 if (do_warning) {
2669 ResourceMark rm(THREAD);
2670 log_warning(jni, resolve)("Re-registering of platform native method: %s.%s%s "
2671 "from code in a different classloader", k->external_name(), meth_name, meth_sig);
2672 }
2673
2674 bool res = Method::register_native(k, name, signature,
2675 (address) methods[index].fnPtr, THREAD);
2676 if (!res) {
2677 ret = -1;
2678 break;
2679 }
2680 }
2681 return ret;
2682 JNI_END
2683
2684
2685 JNI_ENTRY(jint, jni_UnregisterNatives(JNIEnv *env, jclass clazz))
2686 HOTSPOT_JNI_UNREGISTERNATIVES_ENTRY(env, clazz);
2687 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz));
2688 //%note jni_2
2689 if (k->is_instance_klass()) {
2690 for (int index = 0; index < InstanceKlass::cast(k)->methods()->length(); index++) {
2691 Method* m = InstanceKlass::cast(k)->methods()->at(index);
2692 if (m->is_native()) {
2693 m->clear_native_function();
2694 m->set_signature_handler(NULL);
2695 }
2696 }
2697 }
2698 HOTSPOT_JNI_UNREGISTERNATIVES_RETURN(0);
2699 return 0;
2700 JNI_END
2701
2702 //
2703 // Monitor functions
2704 //
2705
2706 DT_RETURN_MARK_DECL(MonitorEnter, jint
2707 , HOTSPOT_JNI_MONITORENTER_RETURN(_ret_ref));
2708
2709 JNI_ENTRY(jint, jni_MonitorEnter(JNIEnv *env, jobject jobj))
2710 HOTSPOT_JNI_MONITORENTER_ENTRY(env, jobj);
2711 jint ret = JNI_ERR;
2712 DT_RETURN_MARK(MonitorEnter, jint, (const jint&)ret);
2713
2714 // If the object is null, we can't do anything with it
2715 if (jobj == NULL) {
2716 THROW_(vmSymbols::java_lang_NullPointerException(), JNI_ERR);
2717 }
2718
2719 Handle obj(thread, JNIHandles::resolve_non_null(jobj));
2720 ObjectSynchronizer::jni_enter(obj, thread);
2721 ret = JNI_OK;
2722 return ret;
2723 JNI_END
2724
2725 DT_RETURN_MARK_DECL(MonitorExit, jint
2726 , HOTSPOT_JNI_MONITOREXIT_RETURN(_ret_ref));
2727
2728 JNI_ENTRY(jint, jni_MonitorExit(JNIEnv *env, jobject jobj))
2729 HOTSPOT_JNI_MONITOREXIT_ENTRY(env, jobj);
2730 jint ret = JNI_ERR;
2731 DT_RETURN_MARK(MonitorExit, jint, (const jint&)ret);
2732
2733 // Don't do anything with a null object
2734 if (jobj == NULL) {
2735 THROW_(vmSymbols::java_lang_NullPointerException(), JNI_ERR);
2736 }
2737
2738 Handle obj(THREAD, JNIHandles::resolve_non_null(jobj));
2739 ObjectSynchronizer::jni_exit(obj(), CHECK_(JNI_ERR));
2740
2741 ret = JNI_OK;
2742 return ret;
2743 JNI_END
2744
2745 //
2746 // Extensions
2747 //
2748
2749 DT_VOID_RETURN_MARK_DECL(GetStringRegion
2750 , HOTSPOT_JNI_GETSTRINGREGION_RETURN());
2751
2752 JNI_ENTRY(void, jni_GetStringRegion(JNIEnv *env, jstring string, jsize start, jsize len, jchar *buf))
2753 HOTSPOT_JNI_GETSTRINGREGION_ENTRY(env, string, start, len, buf);
2754 DT_VOID_RETURN_MARK(GetStringRegion);
2755 oop s = JNIHandles::resolve_non_null(string);
2756 typeArrayOop s_value = java_lang_String::value(s);
2757 int s_len = java_lang_String::length(s, s_value);
2758 if (start < 0 || len < 0 || start > s_len - len) {
2759 THROW(vmSymbols::java_lang_StringIndexOutOfBoundsException());
2760 } else {
2761 if (len > 0) {
2762 bool is_latin1 = java_lang_String::is_latin1(s);
2763 if (!is_latin1) {
2764 ArrayAccess<>::arraycopy_to_native(s_value, typeArrayOopDesc::element_offset<jchar>(start),
2765 buf, len);
2766 } else {
2767 for (int i = 0; i < len; i++) {
2768 buf[i] = ((jchar) s_value->byte_at(i + start)) & 0xff;
2769 }
2770 }
2771 }
2772 }
2773 JNI_END
2774
2775 DT_VOID_RETURN_MARK_DECL(GetStringUTFRegion
2776 , HOTSPOT_JNI_GETSTRINGUTFREGION_RETURN());
2777
2778 JNI_ENTRY(void, jni_GetStringUTFRegion(JNIEnv *env, jstring string, jsize start, jsize len, char *buf))
2779 HOTSPOT_JNI_GETSTRINGUTFREGION_ENTRY(env, string, start, len, buf);
2780 DT_VOID_RETURN_MARK(GetStringUTFRegion);
2781 oop s = JNIHandles::resolve_non_null(string);
2782 typeArrayOop s_value = java_lang_String::value(s);
2783 int s_len = java_lang_String::length(s, s_value);
2784 if (start < 0 || len < 0 || start > s_len - len) {
2785 THROW(vmSymbols::java_lang_StringIndexOutOfBoundsException());
2786 } else {
2787 //%note jni_7
2788 if (len > 0) {
2789 // Assume the buffer is large enough as the JNI spec. does not require user error checking
2790 java_lang_String::as_utf8_string(s, s_value, start, len, buf, INT_MAX);
2791 // as_utf8_string null-terminates the result string
2792 } else {
2793 // JDK null-terminates the buffer even in len is zero
2794 if (buf != NULL) {
2795 buf[0] = 0;
2796 }
2797 }
2798 }
2799 JNI_END
2800
lock_gc_or_pin_object(JavaThread * thread,jobject obj)2801 static oop lock_gc_or_pin_object(JavaThread* thread, jobject obj) {
2802 if (Universe::heap()->supports_object_pinning()) {
2803 const oop o = JNIHandles::resolve_non_null(obj);
2804 return Universe::heap()->pin_object(thread, o);
2805 } else {
2806 GCLocker::lock_critical(thread);
2807 return JNIHandles::resolve_non_null(obj);
2808 }
2809 }
2810
unlock_gc_or_unpin_object(JavaThread * thread,jobject obj)2811 static void unlock_gc_or_unpin_object(JavaThread* thread, jobject obj) {
2812 if (Universe::heap()->supports_object_pinning()) {
2813 const oop o = JNIHandles::resolve_non_null(obj);
2814 return Universe::heap()->unpin_object(thread, o);
2815 } else {
2816 GCLocker::unlock_critical(thread);
2817 }
2818 }
2819
2820 JNI_ENTRY(void*, jni_GetPrimitiveArrayCritical(JNIEnv *env, jarray array, jboolean *isCopy))
2821 HOTSPOT_JNI_GETPRIMITIVEARRAYCRITICAL_ENTRY(env, array, (uintptr_t *) isCopy);
2822 if (isCopy != NULL) {
2823 *isCopy = JNI_FALSE;
2824 }
2825 oop a = lock_gc_or_pin_object(thread, array);
2826 assert(a->is_array(), "just checking");
2827 BasicType type;
2828 if (a->is_objArray()) {
2829 type = T_OBJECT;
2830 } else {
2831 type = TypeArrayKlass::cast(a->klass())->element_type();
2832 }
2833 void* ret = arrayOop(a)->base(type);
2834 HOTSPOT_JNI_GETPRIMITIVEARRAYCRITICAL_RETURN(ret);
2835 return ret;
2836 JNI_END
2837
2838
2839 JNI_ENTRY(void, jni_ReleasePrimitiveArrayCritical(JNIEnv *env, jarray array, void *carray, jint mode))
2840 HOTSPOT_JNI_RELEASEPRIMITIVEARRAYCRITICAL_ENTRY(env, array, carray, mode);
2841 unlock_gc_or_unpin_object(thread, array);
2842 HOTSPOT_JNI_RELEASEPRIMITIVEARRAYCRITICAL_RETURN();
2843 JNI_END
2844
2845
lock_gc_or_pin_string_value(JavaThread * thread,oop str)2846 static typeArrayOop lock_gc_or_pin_string_value(JavaThread* thread, oop str) {
2847 if (Universe::heap()->supports_object_pinning()) {
2848 // Forbid deduplication before obtaining the value array, to prevent
2849 // deduplication from replacing the value array while setting up or in
2850 // the critical section. That would lead to the release operation
2851 // unpinning the wrong object.
2852 if (StringDedup::is_enabled()) {
2853 NoSafepointVerifier nsv;
2854 StringDedup::forbid_deduplication(str);
2855 }
2856 typeArrayOop s_value = java_lang_String::value(str);
2857 return (typeArrayOop) Universe::heap()->pin_object(thread, s_value);
2858 } else {
2859 Handle h(thread, str); // Handlize across potential safepoint.
2860 GCLocker::lock_critical(thread);
2861 return java_lang_String::value(h());
2862 }
2863 }
2864
unlock_gc_or_unpin_string_value(JavaThread * thread,oop str)2865 static void unlock_gc_or_unpin_string_value(JavaThread* thread, oop str) {
2866 if (Universe::heap()->supports_object_pinning()) {
2867 typeArrayOop s_value = java_lang_String::value(str);
2868 Universe::heap()->unpin_object(thread, s_value);
2869 } else {
2870 GCLocker::unlock_critical(thread);
2871 }
2872 }
2873
2874 JNI_ENTRY(const jchar*, jni_GetStringCritical(JNIEnv *env, jstring string, jboolean *isCopy))
2875 HOTSPOT_JNI_GETSTRINGCRITICAL_ENTRY(env, string, (uintptr_t *) isCopy);
2876 oop s = JNIHandles::resolve_non_null(string);
2877 jchar* ret;
2878 if (!java_lang_String::is_latin1(s)) {
2879 typeArrayOop s_value = lock_gc_or_pin_string_value(thread, s);
2880 ret = (jchar*) s_value->base(T_CHAR);
2881 if (isCopy != NULL) *isCopy = JNI_FALSE;
2882 } else {
2883 // Inflate latin1 encoded string to UTF16
2884 typeArrayOop s_value = java_lang_String::value(s);
2885 int s_len = java_lang_String::length(s, s_value);
2886 ret = NEW_C_HEAP_ARRAY_RETURN_NULL(jchar, s_len + 1, mtInternal); // add one for zero termination
2887 /* JNI Specification states return NULL on OOM */
2888 if (ret != NULL) {
2889 for (int i = 0; i < s_len; i++) {
2890 ret[i] = ((jchar) s_value->byte_at(i)) & 0xff;
2891 }
2892 ret[s_len] = 0;
2893 }
2894 if (isCopy != NULL) *isCopy = JNI_TRUE;
2895 }
2896 HOTSPOT_JNI_GETSTRINGCRITICAL_RETURN((uint16_t *) ret);
2897 return ret;
2898 JNI_END
2899
2900
2901 JNI_ENTRY(void, jni_ReleaseStringCritical(JNIEnv *env, jstring str, const jchar *chars))
2902 HOTSPOT_JNI_RELEASESTRINGCRITICAL_ENTRY(env, str, (uint16_t *) chars);
2903 oop s = JNIHandles::resolve_non_null(str);
2904 bool is_latin1 = java_lang_String::is_latin1(s);
2905 if (is_latin1) {
2906 // For latin1 string, free jchar array allocated by earlier call to GetStringCritical.
2907 // This assumes that ReleaseStringCritical bookends GetStringCritical.
2908 FREE_C_HEAP_ARRAY(jchar, chars);
2909 } else {
2910 // For non-latin1 string, drop the associated gc-locker/pin.
2911 unlock_gc_or_unpin_string_value(thread, s);
2912 }
2913 HOTSPOT_JNI_RELEASESTRINGCRITICAL_RETURN();
2914 JNI_END
2915
2916
2917 JNI_ENTRY(jweak, jni_NewWeakGlobalRef(JNIEnv *env, jobject ref))
2918 HOTSPOT_JNI_NEWWEAKGLOBALREF_ENTRY(env, ref);
2919 Handle ref_handle(thread, JNIHandles::resolve(ref));
2920 jweak ret = JNIHandles::make_weak_global(ref_handle, AllocFailStrategy::RETURN_NULL);
2921 if (ret == NULL) {
2922 THROW_OOP_(Universe::out_of_memory_error_c_heap(), NULL);
2923 }
2924 HOTSPOT_JNI_NEWWEAKGLOBALREF_RETURN(ret);
2925 return ret;
2926 JNI_END
2927
2928 // Must be JNI_ENTRY (with HandleMark)
2929 JNI_ENTRY(void, jni_DeleteWeakGlobalRef(JNIEnv *env, jweak ref))
2930 HOTSPOT_JNI_DELETEWEAKGLOBALREF_ENTRY(env, ref);
2931 JNIHandles::destroy_weak_global(ref);
2932 HOTSPOT_JNI_DELETEWEAKGLOBALREF_RETURN();
2933 JNI_END
2934
2935
2936 JNI_ENTRY_NO_PRESERVE(jboolean, jni_ExceptionCheck(JNIEnv *env))
2937 HOTSPOT_JNI_EXCEPTIONCHECK_ENTRY(env);
2938 jni_check_async_exceptions(thread);
2939 jboolean ret = (thread->has_pending_exception()) ? JNI_TRUE : JNI_FALSE;
2940 HOTSPOT_JNI_EXCEPTIONCHECK_RETURN(ret);
2941 return ret;
2942 JNI_END
2943
2944
2945 // Initialization state for three routines below relating to
2946 // java.nio.DirectBuffers
2947 static int directBufferSupportInitializeStarted = 0;
2948 static volatile int directBufferSupportInitializeEnded = 0;
2949 static volatile int directBufferSupportInitializeFailed = 0;
2950 static jclass bufferClass = NULL;
2951 static jclass directBufferClass = NULL;
2952 static jclass directByteBufferClass = NULL;
2953 static jmethodID directByteBufferConstructor = NULL;
2954 static jfieldID directBufferAddressField = NULL;
2955 static jfieldID bufferCapacityField = NULL;
2956
lookupOne(JNIEnv * env,const char * name,TRAPS)2957 static jclass lookupOne(JNIEnv* env, const char* name, TRAPS) {
2958 Handle loader; // null (bootstrap) loader
2959 Handle protection_domain; // null protection domain
2960
2961 TempNewSymbol sym = SymbolTable::new_symbol(name);
2962 jclass result = find_class_from_class_loader(env, sym, true, loader, protection_domain, true, CHECK_NULL);
2963
2964 if (log_is_enabled(Debug, class, resolve) && result != NULL) {
2965 trace_class_resolution(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(result)));
2966 }
2967 return result;
2968 }
2969
2970 // These lookups are done with the NULL (bootstrap) ClassLoader to
2971 // circumvent any security checks that would be done by jni_FindClass.
JNI_ENTRY(bool,lookupDirectBufferClasses (JNIEnv * env))2972 JNI_ENTRY(bool, lookupDirectBufferClasses(JNIEnv* env))
2973 {
2974 if ((bufferClass = lookupOne(env, "java/nio/Buffer", thread)) == NULL) { return false; }
2975 if ((directBufferClass = lookupOne(env, "sun/nio/ch/DirectBuffer", thread)) == NULL) { return false; }
2976 if ((directByteBufferClass = lookupOne(env, "java/nio/DirectByteBuffer", thread)) == NULL) { return false; }
2977 return true;
2978 }
2979 JNI_END
2980
2981
initializeDirectBufferSupport(JNIEnv * env,JavaThread * thread)2982 static bool initializeDirectBufferSupport(JNIEnv* env, JavaThread* thread) {
2983 if (directBufferSupportInitializeFailed) {
2984 return false;
2985 }
2986
2987 if (Atomic::cmpxchg(&directBufferSupportInitializeStarted, 0, 1) == 0) {
2988 if (!lookupDirectBufferClasses(env)) {
2989 directBufferSupportInitializeFailed = 1;
2990 return false;
2991 }
2992
2993 // Make global references for these
2994 bufferClass = (jclass) env->NewGlobalRef(bufferClass);
2995 directBufferClass = (jclass) env->NewGlobalRef(directBufferClass);
2996 directByteBufferClass = (jclass) env->NewGlobalRef(directByteBufferClass);
2997
2998 // Global refs will be NULL if out-of-memory (no exception is pending)
2999 if (bufferClass == NULL || directBufferClass == NULL || directByteBufferClass == NULL) {
3000 directBufferSupportInitializeFailed = 1;
3001 return false;
3002 }
3003
3004 // Get needed field and method IDs
3005 directByteBufferConstructor = env->GetMethodID(directByteBufferClass, "<init>", "(JI)V");
3006 if (env->ExceptionCheck()) {
3007 env->ExceptionClear();
3008 directBufferSupportInitializeFailed = 1;
3009 return false;
3010 }
3011 directBufferAddressField = env->GetFieldID(bufferClass, "address", "J");
3012 if (env->ExceptionCheck()) {
3013 env->ExceptionClear();
3014 directBufferSupportInitializeFailed = 1;
3015 return false;
3016 }
3017 bufferCapacityField = env->GetFieldID(bufferClass, "capacity", "I");
3018 if (env->ExceptionCheck()) {
3019 env->ExceptionClear();
3020 directBufferSupportInitializeFailed = 1;
3021 return false;
3022 }
3023
3024 if ((directByteBufferConstructor == NULL) ||
3025 (directBufferAddressField == NULL) ||
3026 (bufferCapacityField == NULL)) {
3027 directBufferSupportInitializeFailed = 1;
3028 return false;
3029 }
3030
3031 directBufferSupportInitializeEnded = 1;
3032 } else {
3033 while (!directBufferSupportInitializeEnded && !directBufferSupportInitializeFailed) {
3034 os::naked_yield();
3035 }
3036 }
3037
3038 return !directBufferSupportInitializeFailed;
3039 }
3040
jni_NewDirectByteBuffer(JNIEnv * env,void * address,jlong capacity)3041 extern "C" jobject JNICALL jni_NewDirectByteBuffer(JNIEnv *env, void* address, jlong capacity)
3042 {
3043 // thread_from_jni_environment() will block if VM is gone.
3044 JavaThread* thread = JavaThread::thread_from_jni_environment(env);
3045
3046 HOTSPOT_JNI_NEWDIRECTBYTEBUFFER_ENTRY(env, address, capacity);
3047
3048 if (!directBufferSupportInitializeEnded) {
3049 if (!initializeDirectBufferSupport(env, thread)) {
3050 HOTSPOT_JNI_NEWDIRECTBYTEBUFFER_RETURN(NULL);
3051 return NULL;
3052 }
3053 }
3054
3055 // Being paranoid about accidental sign extension on address
3056 jlong addr = (jlong) ((uintptr_t) address);
3057 // NOTE that package-private DirectByteBuffer constructor currently
3058 // takes int capacity
3059 jint cap = (jint) capacity;
3060 jobject ret = env->NewObject(directByteBufferClass, directByteBufferConstructor, addr, cap);
3061 HOTSPOT_JNI_NEWDIRECTBYTEBUFFER_RETURN(ret);
3062 return ret;
3063 }
3064
3065 DT_RETURN_MARK_DECL(GetDirectBufferAddress, void*
3066 , HOTSPOT_JNI_GETDIRECTBUFFERADDRESS_RETURN((void*) _ret_ref));
3067
jni_GetDirectBufferAddress(JNIEnv * env,jobject buf)3068 extern "C" void* JNICALL jni_GetDirectBufferAddress(JNIEnv *env, jobject buf)
3069 {
3070 // thread_from_jni_environment() will block if VM is gone.
3071 JavaThread* thread = JavaThread::thread_from_jni_environment(env);
3072
3073 HOTSPOT_JNI_GETDIRECTBUFFERADDRESS_ENTRY(env, buf);
3074 void* ret = NULL;
3075 DT_RETURN_MARK(GetDirectBufferAddress, void*, (const void*&)ret);
3076
3077 if (!directBufferSupportInitializeEnded) {
3078 if (!initializeDirectBufferSupport(env, thread)) {
3079 return 0;
3080 }
3081 }
3082
3083 if ((buf != NULL) && (!env->IsInstanceOf(buf, directBufferClass))) {
3084 return 0;
3085 }
3086
3087 ret = (void*)(intptr_t)env->GetLongField(buf, directBufferAddressField);
3088 return ret;
3089 }
3090
3091 DT_RETURN_MARK_DECL(GetDirectBufferCapacity, jlong
3092 , HOTSPOT_JNI_GETDIRECTBUFFERCAPACITY_RETURN(_ret_ref));
3093
jni_GetDirectBufferCapacity(JNIEnv * env,jobject buf)3094 extern "C" jlong JNICALL jni_GetDirectBufferCapacity(JNIEnv *env, jobject buf)
3095 {
3096 // thread_from_jni_environment() will block if VM is gone.
3097 JavaThread* thread = JavaThread::thread_from_jni_environment(env);
3098
3099 HOTSPOT_JNI_GETDIRECTBUFFERCAPACITY_ENTRY(env, buf);
3100 jlong ret = -1;
3101 DT_RETURN_MARK(GetDirectBufferCapacity, jlong, (const jlong&)ret);
3102
3103 if (!directBufferSupportInitializeEnded) {
3104 if (!initializeDirectBufferSupport(env, thread)) {
3105 ret = 0;
3106 return ret;
3107 }
3108 }
3109
3110 if (buf == NULL) {
3111 return -1;
3112 }
3113
3114 if (!env->IsInstanceOf(buf, directBufferClass)) {
3115 return -1;
3116 }
3117
3118 // NOTE that capacity is currently an int in the implementation
3119 ret = env->GetIntField(buf, bufferCapacityField);
3120 return ret;
3121 }
3122
3123
3124 JNI_LEAF(jint, jni_GetVersion(JNIEnv *env))
3125 HOTSPOT_JNI_GETVERSION_ENTRY(env);
3126 HOTSPOT_JNI_GETVERSION_RETURN(CurrentVersion);
3127 return CurrentVersion;
3128 JNI_END
3129
3130 extern struct JavaVM_ main_vm;
3131
3132 JNI_LEAF(jint, jni_GetJavaVM(JNIEnv *env, JavaVM **vm))
3133 HOTSPOT_JNI_GETJAVAVM_ENTRY(env, (void **) vm);
3134 *vm = (JavaVM *)(&main_vm);
3135 HOTSPOT_JNI_GETJAVAVM_RETURN(JNI_OK);
3136 return JNI_OK;
3137 JNI_END
3138
3139
3140 JNI_ENTRY(jobject, jni_GetModule(JNIEnv* env, jclass clazz))
3141 return Modules::get_module(clazz, THREAD);
3142 JNI_END
3143
3144
3145 // Structure containing all jni functions
3146 struct JNINativeInterface_ jni_NativeInterface = {
3147 NULL,
3148 NULL,
3149 NULL,
3150
3151 NULL,
3152
3153 jni_GetVersion,
3154
3155 jni_DefineClass,
3156 jni_FindClass,
3157
3158 jni_FromReflectedMethod,
3159 jni_FromReflectedField,
3160
3161 jni_ToReflectedMethod,
3162
3163 jni_GetSuperclass,
3164 jni_IsAssignableFrom,
3165
3166 jni_ToReflectedField,
3167
3168 jni_Throw,
3169 jni_ThrowNew,
3170 jni_ExceptionOccurred,
3171 jni_ExceptionDescribe,
3172 jni_ExceptionClear,
3173 jni_FatalError,
3174
3175 jni_PushLocalFrame,
3176 jni_PopLocalFrame,
3177
3178 jni_NewGlobalRef,
3179 jni_DeleteGlobalRef,
3180 jni_DeleteLocalRef,
3181 jni_IsSameObject,
3182
3183 jni_NewLocalRef,
3184 jni_EnsureLocalCapacity,
3185
3186 jni_AllocObject,
3187 jni_NewObject,
3188 jni_NewObjectV,
3189 jni_NewObjectA,
3190
3191 jni_GetObjectClass,
3192 jni_IsInstanceOf,
3193
3194 jni_GetMethodID,
3195
3196 jni_CallObjectMethod,
3197 jni_CallObjectMethodV,
3198 jni_CallObjectMethodA,
3199 jni_CallBooleanMethod,
3200 jni_CallBooleanMethodV,
3201 jni_CallBooleanMethodA,
3202 jni_CallByteMethod,
3203 jni_CallByteMethodV,
3204 jni_CallByteMethodA,
3205 jni_CallCharMethod,
3206 jni_CallCharMethodV,
3207 jni_CallCharMethodA,
3208 jni_CallShortMethod,
3209 jni_CallShortMethodV,
3210 jni_CallShortMethodA,
3211 jni_CallIntMethod,
3212 jni_CallIntMethodV,
3213 jni_CallIntMethodA,
3214 jni_CallLongMethod,
3215 jni_CallLongMethodV,
3216 jni_CallLongMethodA,
3217 jni_CallFloatMethod,
3218 jni_CallFloatMethodV,
3219 jni_CallFloatMethodA,
3220 jni_CallDoubleMethod,
3221 jni_CallDoubleMethodV,
3222 jni_CallDoubleMethodA,
3223 jni_CallVoidMethod,
3224 jni_CallVoidMethodV,
3225 jni_CallVoidMethodA,
3226
3227 jni_CallNonvirtualObjectMethod,
3228 jni_CallNonvirtualObjectMethodV,
3229 jni_CallNonvirtualObjectMethodA,
3230 jni_CallNonvirtualBooleanMethod,
3231 jni_CallNonvirtualBooleanMethodV,
3232 jni_CallNonvirtualBooleanMethodA,
3233 jni_CallNonvirtualByteMethod,
3234 jni_CallNonvirtualByteMethodV,
3235 jni_CallNonvirtualByteMethodA,
3236 jni_CallNonvirtualCharMethod,
3237 jni_CallNonvirtualCharMethodV,
3238 jni_CallNonvirtualCharMethodA,
3239 jni_CallNonvirtualShortMethod,
3240 jni_CallNonvirtualShortMethodV,
3241 jni_CallNonvirtualShortMethodA,
3242 jni_CallNonvirtualIntMethod,
3243 jni_CallNonvirtualIntMethodV,
3244 jni_CallNonvirtualIntMethodA,
3245 jni_CallNonvirtualLongMethod,
3246 jni_CallNonvirtualLongMethodV,
3247 jni_CallNonvirtualLongMethodA,
3248 jni_CallNonvirtualFloatMethod,
3249 jni_CallNonvirtualFloatMethodV,
3250 jni_CallNonvirtualFloatMethodA,
3251 jni_CallNonvirtualDoubleMethod,
3252 jni_CallNonvirtualDoubleMethodV,
3253 jni_CallNonvirtualDoubleMethodA,
3254 jni_CallNonvirtualVoidMethod,
3255 jni_CallNonvirtualVoidMethodV,
3256 jni_CallNonvirtualVoidMethodA,
3257
3258 jni_GetFieldID,
3259
3260 jni_GetObjectField,
3261 jni_GetBooleanField,
3262 jni_GetByteField,
3263 jni_GetCharField,
3264 jni_GetShortField,
3265 jni_GetIntField,
3266 jni_GetLongField,
3267 jni_GetFloatField,
3268 jni_GetDoubleField,
3269
3270 jni_SetObjectField,
3271 jni_SetBooleanField,
3272 jni_SetByteField,
3273 jni_SetCharField,
3274 jni_SetShortField,
3275 jni_SetIntField,
3276 jni_SetLongField,
3277 jni_SetFloatField,
3278 jni_SetDoubleField,
3279
3280 jni_GetStaticMethodID,
3281
3282 jni_CallStaticObjectMethod,
3283 jni_CallStaticObjectMethodV,
3284 jni_CallStaticObjectMethodA,
3285 jni_CallStaticBooleanMethod,
3286 jni_CallStaticBooleanMethodV,
3287 jni_CallStaticBooleanMethodA,
3288 jni_CallStaticByteMethod,
3289 jni_CallStaticByteMethodV,
3290 jni_CallStaticByteMethodA,
3291 jni_CallStaticCharMethod,
3292 jni_CallStaticCharMethodV,
3293 jni_CallStaticCharMethodA,
3294 jni_CallStaticShortMethod,
3295 jni_CallStaticShortMethodV,
3296 jni_CallStaticShortMethodA,
3297 jni_CallStaticIntMethod,
3298 jni_CallStaticIntMethodV,
3299 jni_CallStaticIntMethodA,
3300 jni_CallStaticLongMethod,
3301 jni_CallStaticLongMethodV,
3302 jni_CallStaticLongMethodA,
3303 jni_CallStaticFloatMethod,
3304 jni_CallStaticFloatMethodV,
3305 jni_CallStaticFloatMethodA,
3306 jni_CallStaticDoubleMethod,
3307 jni_CallStaticDoubleMethodV,
3308 jni_CallStaticDoubleMethodA,
3309 jni_CallStaticVoidMethod,
3310 jni_CallStaticVoidMethodV,
3311 jni_CallStaticVoidMethodA,
3312
3313 jni_GetStaticFieldID,
3314
3315 jni_GetStaticObjectField,
3316 jni_GetStaticBooleanField,
3317 jni_GetStaticByteField,
3318 jni_GetStaticCharField,
3319 jni_GetStaticShortField,
3320 jni_GetStaticIntField,
3321 jni_GetStaticLongField,
3322 jni_GetStaticFloatField,
3323 jni_GetStaticDoubleField,
3324
3325 jni_SetStaticObjectField,
3326 jni_SetStaticBooleanField,
3327 jni_SetStaticByteField,
3328 jni_SetStaticCharField,
3329 jni_SetStaticShortField,
3330 jni_SetStaticIntField,
3331 jni_SetStaticLongField,
3332 jni_SetStaticFloatField,
3333 jni_SetStaticDoubleField,
3334
3335 jni_NewString,
3336 jni_GetStringLength,
3337 jni_GetStringChars,
3338 jni_ReleaseStringChars,
3339
3340 jni_NewStringUTF,
3341 jni_GetStringUTFLength,
3342 jni_GetStringUTFChars,
3343 jni_ReleaseStringUTFChars,
3344
3345 jni_GetArrayLength,
3346
3347 jni_NewObjectArray,
3348 jni_GetObjectArrayElement,
3349 jni_SetObjectArrayElement,
3350
3351 jni_NewBooleanArray,
3352 jni_NewByteArray,
3353 jni_NewCharArray,
3354 jni_NewShortArray,
3355 jni_NewIntArray,
3356 jni_NewLongArray,
3357 jni_NewFloatArray,
3358 jni_NewDoubleArray,
3359
3360 jni_GetBooleanArrayElements,
3361 jni_GetByteArrayElements,
3362 jni_GetCharArrayElements,
3363 jni_GetShortArrayElements,
3364 jni_GetIntArrayElements,
3365 jni_GetLongArrayElements,
3366 jni_GetFloatArrayElements,
3367 jni_GetDoubleArrayElements,
3368
3369 jni_ReleaseBooleanArrayElements,
3370 jni_ReleaseByteArrayElements,
3371 jni_ReleaseCharArrayElements,
3372 jni_ReleaseShortArrayElements,
3373 jni_ReleaseIntArrayElements,
3374 jni_ReleaseLongArrayElements,
3375 jni_ReleaseFloatArrayElements,
3376 jni_ReleaseDoubleArrayElements,
3377
3378 jni_GetBooleanArrayRegion,
3379 jni_GetByteArrayRegion,
3380 jni_GetCharArrayRegion,
3381 jni_GetShortArrayRegion,
3382 jni_GetIntArrayRegion,
3383 jni_GetLongArrayRegion,
3384 jni_GetFloatArrayRegion,
3385 jni_GetDoubleArrayRegion,
3386
3387 jni_SetBooleanArrayRegion,
3388 jni_SetByteArrayRegion,
3389 jni_SetCharArrayRegion,
3390 jni_SetShortArrayRegion,
3391 jni_SetIntArrayRegion,
3392 jni_SetLongArrayRegion,
3393 jni_SetFloatArrayRegion,
3394 jni_SetDoubleArrayRegion,
3395
3396 jni_RegisterNatives,
3397 jni_UnregisterNatives,
3398
3399 jni_MonitorEnter,
3400 jni_MonitorExit,
3401
3402 jni_GetJavaVM,
3403
3404 jni_GetStringRegion,
3405 jni_GetStringUTFRegion,
3406
3407 jni_GetPrimitiveArrayCritical,
3408 jni_ReleasePrimitiveArrayCritical,
3409
3410 jni_GetStringCritical,
3411 jni_ReleaseStringCritical,
3412
3413 jni_NewWeakGlobalRef,
3414 jni_DeleteWeakGlobalRef,
3415
3416 jni_ExceptionCheck,
3417
3418 jni_NewDirectByteBuffer,
3419 jni_GetDirectBufferAddress,
3420 jni_GetDirectBufferCapacity,
3421
3422 // New 1_6 features
3423
3424 jni_GetObjectRefType,
3425
3426 // Module features
3427
3428 jni_GetModule
3429 };
3430
3431
3432 // For jvmti use to modify jni function table.
3433 // Java threads in native contiues to run until it is transitioned
3434 // to VM at safepoint. Before the transition or before it is blocked
3435 // for safepoint it may access jni function table. VM could crash if
3436 // any java thread access the jni function table in the middle of memcpy.
3437 // To avoid this each function pointers are copied automically.
copy_jni_function_table(const struct JNINativeInterface_ * new_jni_NativeInterface)3438 void copy_jni_function_table(const struct JNINativeInterface_ *new_jni_NativeInterface) {
3439 assert(SafepointSynchronize::is_at_safepoint(), "must be at safepoint");
3440 intptr_t *a = (intptr_t *) jni_functions();
3441 intptr_t *b = (intptr_t *) new_jni_NativeInterface;
3442 for (uint i=0; i < sizeof(struct JNINativeInterface_)/sizeof(void *); i++) {
3443 Atomic::store(a++, *b++);
3444 }
3445 }
3446
quicken_jni_functions()3447 void quicken_jni_functions() {
3448 // Replace Get<Primitive>Field with fast versions
3449 if (UseFastJNIAccessors && !VerifyJNIFields && !CheckJNICalls) {
3450 address func;
3451 func = JNI_FastGetField::generate_fast_get_boolean_field();
3452 if (func != (address)-1) {
3453 jni_NativeInterface.GetBooleanField = (GetBooleanField_t)func;
3454 }
3455 func = JNI_FastGetField::generate_fast_get_byte_field();
3456 if (func != (address)-1) {
3457 jni_NativeInterface.GetByteField = (GetByteField_t)func;
3458 }
3459 func = JNI_FastGetField::generate_fast_get_char_field();
3460 if (func != (address)-1) {
3461 jni_NativeInterface.GetCharField = (GetCharField_t)func;
3462 }
3463 func = JNI_FastGetField::generate_fast_get_short_field();
3464 if (func != (address)-1) {
3465 jni_NativeInterface.GetShortField = (GetShortField_t)func;
3466 }
3467 func = JNI_FastGetField::generate_fast_get_int_field();
3468 if (func != (address)-1) {
3469 jni_NativeInterface.GetIntField = (GetIntField_t)func;
3470 }
3471 func = JNI_FastGetField::generate_fast_get_long_field();
3472 if (func != (address)-1) {
3473 jni_NativeInterface.GetLongField = (GetLongField_t)func;
3474 }
3475 func = JNI_FastGetField::generate_fast_get_float_field();
3476 if (func != (address)-1) {
3477 jni_NativeInterface.GetFloatField = (GetFloatField_t)func;
3478 }
3479 func = JNI_FastGetField::generate_fast_get_double_field();
3480 if (func != (address)-1) {
3481 jni_NativeInterface.GetDoubleField = (GetDoubleField_t)func;
3482 }
3483 }
3484 }
3485
3486 // Returns the function structure
jni_functions()3487 struct JNINativeInterface_* jni_functions() {
3488 #if INCLUDE_JNI_CHECK
3489 if (CheckJNICalls) return jni_functions_check();
3490 #endif // INCLUDE_JNI_CHECK
3491 return &jni_NativeInterface;
3492 }
3493
3494 // Returns the function structure
jni_functions_nocheck()3495 struct JNINativeInterface_* jni_functions_nocheck() {
3496 return &jni_NativeInterface;
3497 }
3498
post_thread_start_event(const JavaThread * jt)3499 static void post_thread_start_event(const JavaThread* jt) {
3500 assert(jt != NULL, "invariant");
3501 EventThreadStart event;
3502 if (event.should_commit()) {
3503 event.set_thread(JFR_THREAD_ID(jt));
3504 event.set_parentThread((traceid)0);
3505 #if INCLUDE_JFR
3506 if (EventThreadStart::is_stacktrace_enabled()) {
3507 jt->jfr_thread_local()->set_cached_stack_trace_id((traceid)0);
3508 event.commit();
3509 jt->jfr_thread_local()->clear_cached_stack_trace();
3510 } else
3511 #endif
3512 {
3513 event.commit();
3514 }
3515 }
3516 }
3517
3518 // Invocation API
3519
3520
3521 // Forward declaration
3522 extern const struct JNIInvokeInterface_ jni_InvokeInterface;
3523
3524 // Global invocation API vars
3525 volatile int vm_created = 0;
3526 // Indicate whether it is safe to recreate VM. Recreation is only
3527 // possible after a failed initial creation attempt in some cases.
3528 volatile int safe_to_recreate_vm = 1;
3529 struct JavaVM_ main_vm = {&jni_InvokeInterface};
3530
3531
3532 #define JAVASTACKSIZE (400 * 1024) /* Default size of a thread java stack */
3533 enum { VERIFY_NONE, VERIFY_REMOTE, VERIFY_ALL };
3534
3535 DT_RETURN_MARK_DECL(GetDefaultJavaVMInitArgs, jint
3536 , HOTSPOT_JNI_GETDEFAULTJAVAVMINITARGS_RETURN(_ret_ref));
3537
JNI_GetDefaultJavaVMInitArgs(void * args_)3538 _JNI_IMPORT_OR_EXPORT_ jint JNICALL JNI_GetDefaultJavaVMInitArgs(void *args_) {
3539 HOTSPOT_JNI_GETDEFAULTJAVAVMINITARGS_ENTRY(args_);
3540 JDK1_1InitArgs *args = (JDK1_1InitArgs *)args_;
3541 jint ret = JNI_ERR;
3542 DT_RETURN_MARK(GetDefaultJavaVMInitArgs, jint, (const jint&)ret);
3543
3544 if (Threads::is_supported_jni_version(args->version)) {
3545 ret = JNI_OK;
3546 }
3547 // 1.1 style no longer supported in hotspot.
3548 // According the JNI spec, we should update args->version on return.
3549 // We also use the structure to communicate with launcher about default
3550 // stack size.
3551 if (args->version == JNI_VERSION_1_1) {
3552 args->version = JNI_VERSION_1_2;
3553 // javaStackSize is int in arguments structure
3554 assert(jlong(ThreadStackSize) * K < INT_MAX, "integer overflow");
3555 args->javaStackSize = (jint)(ThreadStackSize * K);
3556 }
3557 return ret;
3558 }
3559
3560 DT_RETURN_MARK_DECL(CreateJavaVM, jint
3561 , HOTSPOT_JNI_CREATEJAVAVM_RETURN(_ret_ref));
3562
JNI_CreateJavaVM_inner(JavaVM ** vm,void ** penv,void * args)3563 static jint JNI_CreateJavaVM_inner(JavaVM **vm, void **penv, void *args) {
3564 HOTSPOT_JNI_CREATEJAVAVM_ENTRY((void **) vm, penv, args);
3565
3566 jint result = JNI_ERR;
3567 DT_RETURN_MARK(CreateJavaVM, jint, (const jint&)result);
3568
3569 // We're about to use Atomic::xchg for synchronization. Some Zero
3570 // platforms use the GCC builtin __sync_lock_test_and_set for this,
3571 // but __sync_lock_test_and_set is not guaranteed to do what we want
3572 // on all architectures. So we check it works before relying on it.
3573 #if defined(ZERO) && defined(ASSERT)
3574 {
3575 jint a = 0xcafebabe;
3576 jint b = Atomic::xchg(&a, (jint) 0xdeadbeef);
3577 void *c = &a;
3578 void *d = Atomic::xchg(&c, &b);
3579 assert(a == (jint) 0xdeadbeef && b == (jint) 0xcafebabe, "Atomic::xchg() works");
3580 assert(c == &b && d == &a, "Atomic::xchg() works");
3581 }
3582 #endif // ZERO && ASSERT
3583
3584 // At the moment it's only possible to have one Java VM,
3585 // since some of the runtime state is in global variables.
3586
3587 // We cannot use our mutex locks here, since they only work on
3588 // Threads. We do an atomic compare and exchange to ensure only
3589 // one thread can call this method at a time
3590
3591 // We use Atomic::xchg rather than Atomic::add/dec since on some platforms
3592 // the add/dec implementations are dependent on whether we are running
3593 // on a multiprocessor Atomic::xchg does not have this problem.
3594 if (Atomic::xchg(&vm_created, 1) == 1) {
3595 return JNI_EEXIST; // already created, or create attempt in progress
3596 }
3597
3598 // If a previous creation attempt failed but can be retried safely,
3599 // then safe_to_recreate_vm will have been reset to 1 after being
3600 // cleared here. If a previous creation attempt succeeded and we then
3601 // destroyed that VM, we will be prevented from trying to recreate
3602 // the VM in the same process, as the value will still be 0.
3603 if (Atomic::xchg(&safe_to_recreate_vm, 0) == 0) {
3604 return JNI_ERR;
3605 }
3606
3607 assert(vm_created == 1, "vm_created is true during the creation");
3608
3609 /**
3610 * Certain errors during initialization are recoverable and do not
3611 * prevent this method from being called again at a later time
3612 * (perhaps with different arguments). However, at a certain
3613 * point during initialization if an error occurs we cannot allow
3614 * this function to be called again (or it will crash). In those
3615 * situations, the 'canTryAgain' flag is set to false, which atomically
3616 * sets safe_to_recreate_vm to 1, such that any new call to
3617 * JNI_CreateJavaVM will immediately fail using the above logic.
3618 */
3619 bool can_try_again = true;
3620
3621 result = Threads::create_vm((JavaVMInitArgs*) args, &can_try_again);
3622 if (result == JNI_OK) {
3623 JavaThread *thread = JavaThread::current();
3624 assert(!thread->has_pending_exception(), "should have returned not OK");
3625 /* thread is thread_in_vm here */
3626 *vm = (JavaVM *)(&main_vm);
3627 *(JNIEnv**)penv = thread->jni_environment();
3628
3629 #if INCLUDE_JVMCI
3630 if (EnableJVMCI) {
3631 if (UseJVMCICompiler) {
3632 // JVMCI is initialized on a CompilerThread
3633 if (BootstrapJVMCI) {
3634 JavaThread* THREAD = thread; // For exception macros.
3635 JVMCICompiler* compiler = JVMCICompiler::instance(true, CATCH);
3636 compiler->bootstrap(THREAD);
3637 if (HAS_PENDING_EXCEPTION) {
3638 HandleMark hm(THREAD);
3639 vm_exit_during_initialization(Handle(THREAD, PENDING_EXCEPTION));
3640 }
3641 }
3642 }
3643 }
3644 #endif
3645
3646 // Notify JVMTI
3647 if (JvmtiExport::should_post_thread_life()) {
3648 JvmtiExport::post_thread_start(thread);
3649 }
3650
3651 post_thread_start_event(thread);
3652
3653 #ifndef PRODUCT
3654 if (ReplayCompiles) ciReplay::replay(thread);
3655 #endif
3656
3657 #ifdef ASSERT
3658 // Some platforms (like Win*) need a wrapper around these test
3659 // functions in order to properly handle error conditions.
3660 if (ErrorHandlerTest != 0) {
3661 VMError::controlled_crash(ErrorHandlerTest);
3662 }
3663 #endif
3664
3665 // Since this is not a JVM_ENTRY we have to set the thread state manually before leaving.
3666 ThreadStateTransition::transition(thread, _thread_in_vm, _thread_in_native);
3667 MACOS_AARCH64_ONLY(thread->enable_wx(WXExec));
3668 } else {
3669 // If create_vm exits because of a pending exception, exit with that
3670 // exception. In the future when we figure out how to reclaim memory,
3671 // we may be able to exit with JNI_ERR and allow the calling application
3672 // to continue.
3673 if (Universe::is_fully_initialized()) {
3674 // otherwise no pending exception possible - VM will already have aborted
3675 JavaThread* THREAD = JavaThread::current(); // For exception macros.
3676 if (HAS_PENDING_EXCEPTION) {
3677 HandleMark hm(THREAD);
3678 vm_exit_during_initialization(Handle(THREAD, PENDING_EXCEPTION));
3679 }
3680 }
3681
3682 if (can_try_again) {
3683 // reset safe_to_recreate_vm to 1 so that retrial would be possible
3684 safe_to_recreate_vm = 1;
3685 }
3686
3687 // Creation failed. We must reset vm_created
3688 *vm = 0;
3689 *(JNIEnv**)penv = 0;
3690 // reset vm_created last to avoid race condition. Use OrderAccess to
3691 // control both compiler and architectural-based reordering.
3692 Atomic::release_store(&vm_created, 0);
3693 }
3694
3695 // Flush stdout and stderr before exit.
3696 fflush(stdout);
3697 fflush(stderr);
3698
3699 return result;
3700
3701 }
3702
JNI_CreateJavaVM(JavaVM ** vm,void ** penv,void * args)3703 _JNI_IMPORT_OR_EXPORT_ jint JNICALL JNI_CreateJavaVM(JavaVM **vm, void **penv, void *args) {
3704 jint result = JNI_ERR;
3705 // On Windows, let CreateJavaVM run with SEH protection
3706 #if defined(_WIN32) && !defined(USE_VECTORED_EXCEPTION_HANDLING)
3707 __try {
3708 #endif
3709 result = JNI_CreateJavaVM_inner(vm, penv, args);
3710 #if defined(_WIN32) && !defined(USE_VECTORED_EXCEPTION_HANDLING)
3711 } __except(topLevelExceptionFilter((_EXCEPTION_POINTERS*)_exception_info())) {
3712 // Nothing to do.
3713 }
3714 #endif
3715 return result;
3716 }
3717
JNI_GetCreatedJavaVMs(JavaVM ** vm_buf,jsize bufLen,jsize * numVMs)3718 _JNI_IMPORT_OR_EXPORT_ jint JNICALL JNI_GetCreatedJavaVMs(JavaVM **vm_buf, jsize bufLen, jsize *numVMs) {
3719 HOTSPOT_JNI_GETCREATEDJAVAVMS_ENTRY((void **) vm_buf, bufLen, (uintptr_t *) numVMs);
3720
3721 if (vm_created == 1) {
3722 if (numVMs != NULL) *numVMs = 1;
3723 if (bufLen > 0) *vm_buf = (JavaVM *)(&main_vm);
3724 } else {
3725 if (numVMs != NULL) *numVMs = 0;
3726 }
3727 HOTSPOT_JNI_GETCREATEDJAVAVMS_RETURN(JNI_OK);
3728 return JNI_OK;
3729 }
3730
3731 extern "C" {
3732
3733 DT_RETURN_MARK_DECL(DestroyJavaVM, jint
3734 , HOTSPOT_JNI_DESTROYJAVAVM_RETURN(_ret_ref));
3735
jni_DestroyJavaVM_inner(JavaVM * vm)3736 static jint JNICALL jni_DestroyJavaVM_inner(JavaVM *vm) {
3737 HOTSPOT_JNI_DESTROYJAVAVM_ENTRY(vm);
3738 jint res = JNI_ERR;
3739 DT_RETURN_MARK(DestroyJavaVM, jint, (const jint&)res);
3740
3741 if (vm_created == 0) {
3742 res = JNI_ERR;
3743 return res;
3744 }
3745
3746 JNIEnv *env;
3747 JavaVMAttachArgs destroyargs;
3748 destroyargs.version = CurrentVersion;
3749 destroyargs.name = (char *)"DestroyJavaVM";
3750 destroyargs.group = NULL;
3751 res = vm->AttachCurrentThread((void **)&env, (void *)&destroyargs);
3752 if (res != JNI_OK) {
3753 return res;
3754 }
3755
3756 // Since this is not a JVM_ENTRY we have to set the thread state manually before entering.
3757 JavaThread* thread = JavaThread::current();
3758
3759 // We are going to VM, change W^X state to the expected one.
3760 MACOS_AARCH64_ONLY(WXMode oldmode = thread->enable_wx(WXWrite));
3761
3762 ThreadStateTransition::transition_from_native(thread, _thread_in_vm);
3763 Threads::destroy_vm();
3764 // Don't bother restoring thread state, VM is gone.
3765 vm_created = 0;
3766 return JNI_OK;
3767 }
3768
jni_DestroyJavaVM(JavaVM * vm)3769 jint JNICALL jni_DestroyJavaVM(JavaVM *vm) {
3770 jint result = JNI_ERR;
3771 // On Windows, we need SEH protection
3772 #if defined(_WIN32) && !defined(USE_VECTORED_EXCEPTION_HANDLING)
3773 __try {
3774 #endif
3775 result = jni_DestroyJavaVM_inner(vm);
3776 #if defined(_WIN32) && !defined(USE_VECTORED_EXCEPTION_HANDLING)
3777 } __except(topLevelExceptionFilter((_EXCEPTION_POINTERS*)_exception_info())) {
3778 // Nothing to do.
3779 }
3780 #endif
3781 return result;
3782 }
3783
attach_current_thread(JavaVM * vm,void ** penv,void * _args,bool daemon)3784 static jint attach_current_thread(JavaVM *vm, void **penv, void *_args, bool daemon) {
3785 JavaVMAttachArgs *args = (JavaVMAttachArgs *) _args;
3786
3787 // Check below commented out from JDK1.2fcs as well
3788 /*
3789 if (args && (args->version != JNI_VERSION_1_1 || args->version != JNI_VERSION_1_2)) {
3790 return JNI_EVERSION;
3791 }
3792 */
3793
3794 Thread* t = Thread::current_or_null();
3795 if (t != NULL) {
3796 // If executing from an atexit hook we may be in the VMThread.
3797 if (t->is_Java_thread()) {
3798 // If the thread has been attached this operation is a no-op
3799 *(JNIEnv**)penv = t->as_Java_thread()->jni_environment();
3800 return JNI_OK;
3801 } else {
3802 return JNI_ERR;
3803 }
3804 }
3805
3806 // Create a thread and mark it as attaching so it will be skipped by the
3807 // ThreadsListEnumerator - see CR 6404306
3808 JavaThread* thread = new JavaThread(true);
3809
3810 // Set correct safepoint info. The thread is going to call into Java when
3811 // initializing the Java level thread object. Hence, the correct state must
3812 // be set in order for the Safepoint code to deal with it correctly.
3813 thread->set_thread_state(_thread_in_vm);
3814 thread->record_stack_base_and_size();
3815 thread->register_thread_stack_with_NMT();
3816 thread->initialize_thread_current();
3817 MACOS_AARCH64_ONLY(thread->init_wx());
3818
3819 if (!os::create_attached_thread(thread)) {
3820 thread->smr_delete();
3821 return JNI_ERR;
3822 }
3823 // Enable stack overflow checks
3824 thread->stack_overflow_state()->create_stack_guard_pages();
3825
3826 thread->initialize_tlab();
3827
3828 thread->cache_global_variables();
3829
3830 // This thread will not do a safepoint check, since it has
3831 // not been added to the Thread list yet.
3832 { MutexLocker ml(Threads_lock);
3833 // This must be inside this lock in order to get FullGCALot to work properly, i.e., to
3834 // avoid this thread trying to do a GC before it is added to the thread-list
3835 thread->set_active_handles(JNIHandleBlock::allocate_block());
3836 Threads::add(thread, daemon);
3837 }
3838 // Create thread group and name info from attach arguments
3839 oop group = NULL;
3840 char* thread_name = NULL;
3841 if (args != NULL && Threads::is_supported_jni_version(args->version)) {
3842 group = JNIHandles::resolve(args->group);
3843 thread_name = args->name; // may be NULL
3844 }
3845 if (group == NULL) group = Universe::main_thread_group();
3846
3847 // Create Java level thread object and attach it to this thread
3848 bool attach_failed = false;
3849 {
3850 EXCEPTION_MARK;
3851 HandleMark hm(THREAD);
3852 Handle thread_group(THREAD, group);
3853 thread->allocate_threadObj(thread_group, thread_name, daemon, THREAD);
3854 if (HAS_PENDING_EXCEPTION) {
3855 CLEAR_PENDING_EXCEPTION;
3856 // cleanup outside the handle mark.
3857 attach_failed = true;
3858 }
3859 }
3860
3861 if (attach_failed) {
3862 // Added missing cleanup
3863 thread->cleanup_failed_attach_current_thread(daemon);
3864 return JNI_ERR;
3865 }
3866
3867 // mark the thread as no longer attaching
3868 // this uses a fence to push the change through so we don't have
3869 // to regrab the threads_lock
3870 thread->set_done_attaching_via_jni();
3871
3872 // Set java thread status.
3873 java_lang_Thread::set_thread_status(thread->threadObj(),
3874 JavaThreadStatus::RUNNABLE);
3875
3876 // Notify the debugger
3877 if (JvmtiExport::should_post_thread_life()) {
3878 JvmtiExport::post_thread_start(thread);
3879 }
3880
3881 post_thread_start_event(thread);
3882
3883 *(JNIEnv**)penv = thread->jni_environment();
3884
3885 // Now leaving the VM, so change thread_state. This is normally automatically taken care
3886 // of in the JVM_ENTRY. But in this situation we have to do it manually. Notice, that by
3887 // using ThreadStateTransition::transition, we do a callback to the safepoint code if
3888 // needed.
3889
3890 ThreadStateTransition::transition(thread, _thread_in_vm, _thread_in_native);
3891 MACOS_AARCH64_ONLY(thread->enable_wx(WXExec));
3892
3893 // Perform any platform dependent FPU setup
3894 os::setup_fpu();
3895
3896 return JNI_OK;
3897 }
3898
3899
jni_AttachCurrentThread(JavaVM * vm,void ** penv,void * _args)3900 jint JNICALL jni_AttachCurrentThread(JavaVM *vm, void **penv, void *_args) {
3901 HOTSPOT_JNI_ATTACHCURRENTTHREAD_ENTRY(vm, penv, _args);
3902 if (vm_created == 0) {
3903 HOTSPOT_JNI_ATTACHCURRENTTHREAD_RETURN((uint32_t) JNI_ERR);
3904 return JNI_ERR;
3905 }
3906
3907 jint ret = attach_current_thread(vm, penv, _args, false);
3908 HOTSPOT_JNI_ATTACHCURRENTTHREAD_RETURN(ret);
3909 return ret;
3910 }
3911
3912
jni_DetachCurrentThread(JavaVM * vm)3913 jint JNICALL jni_DetachCurrentThread(JavaVM *vm) {
3914 HOTSPOT_JNI_DETACHCURRENTTHREAD_ENTRY(vm);
3915 if (vm_created == 0) {
3916 HOTSPOT_JNI_DETACHCURRENTTHREAD_RETURN(JNI_ERR);
3917 return JNI_ERR;
3918 }
3919
3920 Thread* current = Thread::current_or_null();
3921
3922 // If the thread has already been detached the operation is a no-op
3923 if (current == NULL) {
3924 HOTSPOT_JNI_DETACHCURRENTTHREAD_RETURN(JNI_OK);
3925 return JNI_OK;
3926 }
3927
3928 // If executing from an atexit hook we may be in the VMThread.
3929 if (!current->is_Java_thread()) {
3930 HOTSPOT_JNI_DETACHCURRENTTHREAD_RETURN((uint32_t) JNI_ERR);
3931 return JNI_ERR;
3932 }
3933
3934 VM_Exit::block_if_vm_exited();
3935
3936 JavaThread* thread = current->as_Java_thread();
3937 if (thread->has_last_Java_frame()) {
3938 HOTSPOT_JNI_DETACHCURRENTTHREAD_RETURN((uint32_t) JNI_ERR);
3939 // Can't detach a thread that's running java, that can't work.
3940 return JNI_ERR;
3941 }
3942
3943 // We are going to VM, change W^X state to the expected one.
3944 MACOS_AARCH64_ONLY(thread->enable_wx(WXWrite));
3945
3946 // Safepoint support. Have to do call-back to safepoint code, if in the
3947 // middle of a safepoint operation
3948 ThreadStateTransition::transition_from_native(thread, _thread_in_vm);
3949
3950 // XXX: Note that JavaThread::exit() call below removes the guards on the
3951 // stack pages set up via enable_stack_{red,yellow}_zone() calls
3952 // above in jni_AttachCurrentThread. Unfortunately, while the setting
3953 // of the guards is visible in jni_AttachCurrentThread above,
3954 // the removal of the guards is buried below in JavaThread::exit()
3955 // here. The abstraction should be more symmetrically either exposed
3956 // or hidden (e.g. it could probably be hidden in the same
3957 // (platform-dependent) methods where we do alternate stack
3958 // maintenance work?)
3959 thread->exit(false, JavaThread::jni_detach);
3960 thread->smr_delete();
3961
3962 // Go to the execute mode, the initial state of the thread on creation.
3963 // Use os interface as the thread is not a JavaThread anymore.
3964 MACOS_AARCH64_ONLY(os::current_thread_enable_wx(WXExec));
3965
3966 HOTSPOT_JNI_DETACHCURRENTTHREAD_RETURN(JNI_OK);
3967 return JNI_OK;
3968 }
3969
3970 DT_RETURN_MARK_DECL(GetEnv, jint
3971 , HOTSPOT_JNI_GETENV_RETURN(_ret_ref));
3972
jni_GetEnv(JavaVM * vm,void ** penv,jint version)3973 jint JNICALL jni_GetEnv(JavaVM *vm, void **penv, jint version) {
3974 HOTSPOT_JNI_GETENV_ENTRY(vm, penv, version);
3975 jint ret = JNI_ERR;
3976 DT_RETURN_MARK(GetEnv, jint, (const jint&)ret);
3977
3978 if (vm_created == 0) {
3979 *penv = NULL;
3980 ret = JNI_EDETACHED;
3981 return ret;
3982 }
3983
3984 if (JniExportedInterface::GetExportedInterface(vm, penv, version, &ret)) {
3985 return ret;
3986 }
3987
3988 #ifndef JVMPI_VERSION_1
3989 // need these in order to be polite about older agents
3990 #define JVMPI_VERSION_1 ((jint)0x10000001)
3991 #define JVMPI_VERSION_1_1 ((jint)0x10000002)
3992 #define JVMPI_VERSION_1_2 ((jint)0x10000003)
3993 #endif // !JVMPI_VERSION_1
3994
3995 Thread* thread = Thread::current_or_null();
3996 if (thread != NULL && thread->is_Java_thread()) {
3997 if (Threads::is_supported_jni_version_including_1_1(version)) {
3998 *(JNIEnv**)penv = thread->as_Java_thread()->jni_environment();
3999 ret = JNI_OK;
4000 return ret;
4001
4002 } else if (version == JVMPI_VERSION_1 ||
4003 version == JVMPI_VERSION_1_1 ||
4004 version == JVMPI_VERSION_1_2) {
4005 tty->print_cr("ERROR: JVMPI, an experimental interface, is no longer supported.");
4006 tty->print_cr("Please use the supported interface: the JVM Tool Interface (JVM TI).");
4007 ret = JNI_EVERSION;
4008 return ret;
4009 } else if (JvmtiExport::is_jvmdi_version(version)) {
4010 tty->print_cr("FATAL ERROR: JVMDI is no longer supported.");
4011 tty->print_cr("Please use the supported interface: the JVM Tool Interface (JVM TI).");
4012 ret = JNI_EVERSION;
4013 return ret;
4014 } else {
4015 *penv = NULL;
4016 ret = JNI_EVERSION;
4017 return ret;
4018 }
4019 } else {
4020 *penv = NULL;
4021 ret = JNI_EDETACHED;
4022 return ret;
4023 }
4024 }
4025
4026
jni_AttachCurrentThreadAsDaemon(JavaVM * vm,void ** penv,void * _args)4027 jint JNICALL jni_AttachCurrentThreadAsDaemon(JavaVM *vm, void **penv, void *_args) {
4028 HOTSPOT_JNI_ATTACHCURRENTTHREADASDAEMON_ENTRY(vm, penv, _args);
4029 if (vm_created == 0) {
4030 HOTSPOT_JNI_ATTACHCURRENTTHREADASDAEMON_RETURN((uint32_t) JNI_ERR);
4031 return JNI_ERR;
4032 }
4033
4034 jint ret = attach_current_thread(vm, penv, _args, true);
4035 HOTSPOT_JNI_ATTACHCURRENTTHREADASDAEMON_RETURN(ret);
4036 return ret;
4037 }
4038
4039
4040 } // End extern "C"
4041
4042 const struct JNIInvokeInterface_ jni_InvokeInterface = {
4043 NULL,
4044 NULL,
4045 NULL,
4046
4047 jni_DestroyJavaVM,
4048 jni_AttachCurrentThread,
4049 jni_DetachCurrentThread,
4050 jni_GetEnv,
4051 jni_AttachCurrentThreadAsDaemon
4052 };
4053