1 /*
2 * Copyright (c) 1997, 2016, Oracle and/or its affiliates. All rights reserved.
3 * Copyright (c) 2012 Red Hat, Inc.
4 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
5 *
6 * This code is free software; you can redistribute it and/or modify it
7 * under the terms of the GNU General Public License version 2 only, as
8 * published by the Free Software Foundation.
9 *
10 * This code is distributed in the hope that it will be useful, but WITHOUT
11 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
12 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
13 * version 2 for more details (a copy is included in the LICENSE file that
14 * accompanied this code).
15 *
16 * You should have received a copy of the GNU General Public License version
17 * 2 along with this work; if not, write to the Free Software Foundation,
18 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
19 *
20 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
21 * or visit www.oracle.com if you need additional information or have any
22 * questions.
23 *
24 */
25
26 #include "precompiled.hpp"
27 #include "ci/ciReplay.hpp"
28 #include "classfile/altHashing.hpp"
29 #include "classfile/classFileStream.hpp"
30 #include "classfile/classLoader.hpp"
31 #include "classfile/javaClasses.inline.hpp"
32 #include "classfile/symbolTable.hpp"
33 #include "classfile/systemDictionary.hpp"
34 #include "classfile/vmSymbols.hpp"
35 #include "gc/shared/gcLocker.inline.hpp"
36 #include "interpreter/linkResolver.hpp"
37 #include "memory/allocation.hpp"
38 #include "memory/allocation.inline.hpp"
39 #include "memory/oopFactory.hpp"
40 #include "memory/universe.inline.hpp"
41 #include "oops/instanceKlass.hpp"
42 #include "oops/instanceOop.hpp"
43 #include "oops/markOop.hpp"
44 #include "oops/method.hpp"
45 #include "oops/objArrayKlass.hpp"
46 #include "oops/objArrayOop.inline.hpp"
47 #include "oops/oop.inline.hpp"
48 #include "oops/symbol.hpp"
49 #include "oops/typeArrayKlass.hpp"
50 #include "oops/typeArrayOop.hpp"
51 #include "prims/jni.h"
52 #include "prims/jniCheck.hpp"
53 #include "prims/jniExport.hpp"
54 #include "prims/jniFastGetField.hpp"
55 #include "prims/jvm.h"
56 #include "prims/jvm_misc.hpp"
57 #include "prims/jvmtiExport.hpp"
58 #include "prims/jvmtiThreadState.hpp"
59 #include "runtime/atomic.inline.hpp"
60 #include "runtime/compilationPolicy.hpp"
61 #include "runtime/fieldDescriptor.hpp"
62 #include "runtime/fprofiler.hpp"
63 #include "runtime/handles.inline.hpp"
64 #include "runtime/interfaceSupport.hpp"
65 #include "runtime/java.hpp"
66 #include "runtime/javaCalls.hpp"
67 #include "runtime/jfieldIDWorkaround.hpp"
68 #include "runtime/orderAccess.inline.hpp"
69 #include "runtime/reflection.hpp"
70 #include "runtime/sharedRuntime.hpp"
71 #include "runtime/signature.hpp"
72 #include "runtime/thread.inline.hpp"
73 #include "runtime/vm_operations.hpp"
74 #include "services/memTracker.hpp"
75 #include "services/runtimeService.hpp"
76 #include "trace/tracing.hpp"
77 #include "utilities/defaultStream.hpp"
78 #include "utilities/dtrace.hpp"
79 #include "utilities/events.hpp"
80 #include "utilities/histogram.hpp"
81 #include "utilities/internalVMTests.hpp"
82 #include "utilities/macros.hpp"
83 #if INCLUDE_ALL_GCS
84 #include "gc/g1/g1SATBCardTableModRefBS.hpp"
85 #endif // INCLUDE_ALL_GCS
86 #if INCLUDE_JVMCI
87 #include "jvmci/jvmciCompiler.hpp"
88 #include "jvmci/jvmciRuntime.hpp"
89 #endif
90
91 static jint CurrentVersion = JNI_VERSION_1_8;
92
93 #ifdef _WIN32
94 extern LONG WINAPI topLevelExceptionFilter(_EXCEPTION_POINTERS* );
95 #endif
96
97 // The DT_RETURN_MARK macros create a scoped object to fire the dtrace
98 // '-return' probe regardless of the return path is taken out of the function.
99 // Methods that have multiple return paths use this to avoid having to
100 // instrument each return path. Methods that use CHECK or THROW must use this
101 // since those macros can cause an immedate uninstrumented return.
102 //
103 // In order to get the return value, a reference to the variable containing
104 // the return value must be passed to the contructor of the object, and
105 // the return value must be set before return (since the mark object has
106 // a reference to it).
107 //
108 // Example:
109 // DT_RETURN_MARK_DECL(SomeFunc, int);
110 // JNI_ENTRY(int, SomeFunc, ...)
111 // int return_value = 0;
112 // DT_RETURN_MARK(SomeFunc, int, (const int&)return_value);
113 // foo(CHECK_0)
114 // return_value = 5;
115 // return return_value;
116 // JNI_END
117 #define DT_RETURN_MARK_DECL(name, type, probe) \
118 DTRACE_ONLY( \
119 class DTraceReturnProbeMark_##name { \
120 public: \
121 const type& _ret_ref; \
122 DTraceReturnProbeMark_##name(const type& v) : _ret_ref(v) {} \
123 ~DTraceReturnProbeMark_##name() { \
124 probe; \
125 } \
126 } \
127 )
128 // Void functions are simpler since there's no return value
129 #define DT_VOID_RETURN_MARK_DECL(name, probe) \
130 DTRACE_ONLY( \
131 class DTraceReturnProbeMark_##name { \
132 public: \
133 ~DTraceReturnProbeMark_##name() { \
134 probe; \
135 } \
136 } \
137 )
138
139 // Place these macros in the function to mark the return. Non-void
140 // functions need the type and address of the return value.
141 #define DT_RETURN_MARK(name, type, ref) \
142 DTRACE_ONLY( DTraceReturnProbeMark_##name dtrace_return_mark(ref) )
143 #define DT_VOID_RETURN_MARK(name) \
144 DTRACE_ONLY( DTraceReturnProbeMark_##name dtrace_return_mark )
145
146
147 // Use these to select distinct code for floating-point vs. non-floating point
148 // situations. Used from within common macros where we need slightly
149 // different behavior for Float/Double
150 #define FP_SELECT_Boolean(intcode, fpcode) intcode
151 #define FP_SELECT_Byte(intcode, fpcode) intcode
152 #define FP_SELECT_Char(intcode, fpcode) intcode
153 #define FP_SELECT_Short(intcode, fpcode) intcode
154 #define FP_SELECT_Object(intcode, fpcode) intcode
155 #define FP_SELECT_Int(intcode, fpcode) intcode
156 #define FP_SELECT_Long(intcode, fpcode) intcode
157 #define FP_SELECT_Float(intcode, fpcode) fpcode
158 #define FP_SELECT_Double(intcode, fpcode) fpcode
159 #define FP_SELECT(TypeName, intcode, fpcode) \
160 FP_SELECT_##TypeName(intcode, fpcode)
161
162 #define COMMA ,
163
164 // Choose DT_RETURN_MARK macros based on the type: float/double -> void
165 // (dtrace doesn't do FP yet)
166 #define DT_RETURN_MARK_DECL_FOR(TypeName, name, type, probe) \
167 FP_SELECT(TypeName, \
168 DT_RETURN_MARK_DECL(name, type, probe), DT_VOID_RETURN_MARK_DECL(name, probe) )
169 #define DT_RETURN_MARK_FOR(TypeName, name, type, ref) \
170 FP_SELECT(TypeName, \
171 DT_RETURN_MARK(name, type, ref), DT_VOID_RETURN_MARK(name) )
172
173
174 // out-of-line helpers for class jfieldIDWorkaround:
175
176 bool jfieldIDWorkaround::is_valid_jfieldID(Klass* k, jfieldID id) {
177 if (jfieldIDWorkaround::is_instance_jfieldID(k, id)) {
178 uintptr_t as_uint = (uintptr_t) id;
179 intptr_t offset = raw_instance_offset(id);
180 if (is_checked_jfieldID(id)) {
181 if (!klass_hash_ok(k, id)) {
182 return false;
183 }
184 }
185 return InstanceKlass::cast(k)->contains_field_offset(offset);
186 } else {
187 JNIid* result = (JNIid*) id;
188 #ifdef ASSERT
189 return result != NULL && result->is_static_field_id();
190 #else
191 return result != NULL;
192 #endif
193 }
194 }
195
196
197 intptr_t jfieldIDWorkaround::encode_klass_hash(Klass* k, intptr_t offset) {
198 if (offset <= small_offset_mask) {
199 Klass* field_klass = k;
200 Klass* super_klass = field_klass->super();
201 // With compressed oops the most super class with nonstatic fields would
202 // be the owner of fields embedded in the header.
203 while (InstanceKlass::cast(super_klass)->has_nonstatic_fields() &&
204 InstanceKlass::cast(super_klass)->contains_field_offset(offset)) {
205 field_klass = super_klass; // super contains the field also
206 super_klass = field_klass->super();
207 }
208 debug_only(NoSafepointVerifier nosafepoint;)
209 uintptr_t klass_hash = field_klass->identity_hash();
210 return ((klass_hash & klass_mask) << klass_shift) | checked_mask_in_place;
211 } else {
212 #if 0
213 #ifndef PRODUCT
214 {
215 ResourceMark rm;
216 warning("VerifyJNIFields: long offset %d in %s", offset, k->external_name());
217 }
218 #endif
219 #endif
220 return 0;
221 }
222 }
223
224 bool jfieldIDWorkaround::klass_hash_ok(Klass* k, jfieldID id) {
225 uintptr_t as_uint = (uintptr_t) id;
226 intptr_t klass_hash = (as_uint >> klass_shift) & klass_mask;
227 do {
228 debug_only(NoSafepointVerifier nosafepoint;)
229 // Could use a non-blocking query for identity_hash here...
230 if ((k->identity_hash() & klass_mask) == klass_hash)
231 return true;
232 k = k->super();
233 } while (k != NULL);
234 return false;
235 }
236
237 void jfieldIDWorkaround::verify_instance_jfieldID(Klass* k, jfieldID id) {
238 guarantee(jfieldIDWorkaround::is_instance_jfieldID(k, id), "must be an instance field" );
239 uintptr_t as_uint = (uintptr_t) id;
240 intptr_t offset = raw_instance_offset(id);
241 if (VerifyJNIFields) {
242 if (is_checked_jfieldID(id)) {
243 guarantee(klass_hash_ok(k, id),
244 "Bug in native code: jfieldID class must match object");
245 } else {
246 #if 0
247 #ifndef PRODUCT
248 if (Verbose) {
249 ResourceMark rm;
250 warning("VerifyJNIFields: unverified offset %d for %s", offset, k->external_name());
251 }
252 #endif
253 #endif
254 }
255 }
256 guarantee(InstanceKlass::cast(k)->contains_field_offset(offset),
257 "Bug in native code: jfieldID offset must address interior of object");
258 }
259
260 // Wrapper to trace JNI functions
261
262 #ifdef ASSERT
263 Histogram* JNIHistogram;
264 static volatile jint JNIHistogram_lock = 0;
265
266 class JNIHistogramElement : public HistogramElement {
267 public:
268 JNIHistogramElement(const char* name);
269 };
270
271 JNIHistogramElement::JNIHistogramElement(const char* elementName) {
272 _name = elementName;
273 uintx count = 0;
274
275 while (Atomic::cmpxchg(1, &JNIHistogram_lock, 0) != 0) {
276 while (OrderAccess::load_acquire(&JNIHistogram_lock) != 0) {
277 count +=1;
278 if ( (WarnOnStalledSpinLock > 0)
279 && (count % WarnOnStalledSpinLock == 0)) {
280 warning("JNIHistogram_lock seems to be stalled");
281 }
282 }
283 }
284
285
286 if(JNIHistogram == NULL)
287 JNIHistogram = new Histogram("JNI Call Counts",100);
288
289 JNIHistogram->add_element(this);
290 Atomic::dec(&JNIHistogram_lock);
291 }
292
293 #define JNICountWrapper(arg) \
294 static JNIHistogramElement* e = new JNIHistogramElement(arg); \
295 /* There is a MT-race condition in VC++. So we need to make sure that that e has been initialized */ \
296 if (e != NULL) e->increment_count()
297 #define JNIWrapper(arg) JNICountWrapper(arg);
298 #else
299 #define JNIWrapper(arg)
300 #endif
301
302
303 // Implementation of JNI entries
304
305 DT_RETURN_MARK_DECL(DefineClass, jclass
306 , HOTSPOT_JNI_DEFINECLASS_RETURN(_ret_ref));
307
308 JNI_ENTRY(jclass, jni_DefineClass(JNIEnv *env, const char *name, jobject loaderRef,
309 const jbyte *buf, jsize bufLen))
310 JNIWrapper("DefineClass");
311
312 HOTSPOT_JNI_DEFINECLASS_ENTRY(
313 env, (char*) name, loaderRef, (char*) buf, bufLen);
314
315 jclass cls = NULL;
316 DT_RETURN_MARK(DefineClass, jclass, (const jclass&)cls);
317
318 TempNewSymbol class_name = NULL;
319 // Since exceptions can be thrown, class initialization can take place
320 // if name is NULL no check for class name in .class stream has to be made.
321 if (name != NULL) {
322 const int str_len = (int)strlen(name);
323 if (str_len > Symbol::max_length()) {
324 // It's impossible to create this class; the name cannot fit
325 // into the constant pool.
326 THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), name);
327 }
328 class_name = SymbolTable::new_symbol(name, CHECK_NULL);
329 }
330 ResourceMark rm(THREAD);
331 ClassFileStream st((u1*)buf, bufLen, NULL, ClassFileStream::verify);
332 Handle class_loader (THREAD, JNIHandles::resolve(loaderRef));
333
334 if (UsePerfData && !class_loader.is_null()) {
335 // check whether the current caller thread holds the lock or not.
336 // If not, increment the corresponding counter
337 if (ObjectSynchronizer::
338 query_lock_ownership((JavaThread*)THREAD, class_loader) !=
339 ObjectSynchronizer::owner_self) {
340 ClassLoader::sync_JNIDefineClassLockFreeCounter()->inc();
341 }
342 }
343 Klass* k = SystemDictionary::resolve_from_stream(class_name,
344 class_loader,
345 Handle(),
346 &st,
347 CHECK_NULL);
348
349 if (log_is_enabled(Info, classresolve) && k != NULL) {
350 trace_class_resolution(k);
351 }
352
353 cls = (jclass)JNIHandles::make_local(
354 env, k->java_mirror());
355 return cls;
356 JNI_END
357
358
359
360 static bool first_time_FindClass = true;
361
362 DT_RETURN_MARK_DECL(FindClass, jclass
363 , HOTSPOT_JNI_FINDCLASS_RETURN(_ret_ref));
364
365 JNI_ENTRY(jclass, jni_FindClass(JNIEnv *env, const char *name))
366 JNIWrapper("FindClass");
367
368 HOTSPOT_JNI_FINDCLASS_ENTRY(env, (char *)name);
369
370 jclass result = NULL;
371 DT_RETURN_MARK(FindClass, jclass, (const jclass&)result);
372
373 // Remember if we are the first invocation of jni_FindClass
374 bool first_time = first_time_FindClass;
375 first_time_FindClass = false;
376
377 // Sanity check the name: it cannot be null or larger than the maximum size
378 // name we can fit in the constant pool.
379 if (name == NULL || (int)strlen(name) > Symbol::max_length()) {
380 THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), name);
381 }
382
383 //%note jni_3
384 Handle loader;
385 Handle protection_domain;
386 // Find calling class
387 instanceKlassHandle k (THREAD, thread->security_get_caller_class(0));
388 if (k.not_null()) {
389 loader = Handle(THREAD, k->class_loader());
390 // Special handling to make sure JNI_OnLoad and JNI_OnUnload are executed
391 // in the correct class context.
392 if (loader.is_null() &&
393 k->name() == vmSymbols::java_lang_ClassLoader_NativeLibrary()) {
394 JavaValue result(T_OBJECT);
395 JavaCalls::call_static(&result, k,
396 vmSymbols::getFromClass_name(),
397 vmSymbols::void_class_signature(),
398 thread);
399 if (HAS_PENDING_EXCEPTION) {
400 Handle ex(thread, thread->pending_exception());
401 CLEAR_PENDING_EXCEPTION;
402 THROW_HANDLE_0(ex);
403 }
404 oop mirror = (oop) result.get_jobject();
405 loader = Handle(THREAD,
406 InstanceKlass::cast(java_lang_Class::as_Klass(mirror))->class_loader());
407 protection_domain = Handle(THREAD,
408 InstanceKlass::cast(java_lang_Class::as_Klass(mirror))->protection_domain());
409 }
410 } else {
411 // We call ClassLoader.getSystemClassLoader to obtain the system class loader.
412 loader = Handle(THREAD, SystemDictionary::java_system_loader());
413 }
414
415 TempNewSymbol sym = SymbolTable::new_symbol(name, CHECK_NULL);
416 result = find_class_from_class_loader(env, sym, true, loader,
417 protection_domain, true, thread);
418
419 if (log_is_enabled(Info, classresolve) && result != NULL) {
420 trace_class_resolution(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(result)));
421 }
422
423 // If we were the first invocation of jni_FindClass, we enable compilation again
424 // rather than just allowing invocation counter to overflow and decay.
425 // Controlled by flag DelayCompilationDuringStartup.
426 if (first_time && !CompileTheWorld)
427 CompilationPolicy::completed_vm_startup();
428
429 return result;
430 JNI_END
431
432 DT_RETURN_MARK_DECL(FromReflectedMethod, jmethodID
433 , HOTSPOT_JNI_FROMREFLECTEDMETHOD_RETURN((uintptr_t)_ret_ref));
434
435 JNI_ENTRY(jmethodID, jni_FromReflectedMethod(JNIEnv *env, jobject method))
436 JNIWrapper("FromReflectedMethod");
437
438 HOTSPOT_JNI_FROMREFLECTEDMETHOD_ENTRY(env, method);
439
440 jmethodID ret = NULL;
441 DT_RETURN_MARK(FromReflectedMethod, jmethodID, (const jmethodID&)ret);
442
443 // method is a handle to a java.lang.reflect.Method object
444 oop reflected = JNIHandles::resolve_non_null(method);
445 oop mirror = NULL;
446 int slot = 0;
447
448 if (reflected->klass() == SystemDictionary::reflect_Constructor_klass()) {
449 mirror = java_lang_reflect_Constructor::clazz(reflected);
450 slot = java_lang_reflect_Constructor::slot(reflected);
451 } else {
452 assert(reflected->klass() == SystemDictionary::reflect_Method_klass(), "wrong type");
453 mirror = java_lang_reflect_Method::clazz(reflected);
454 slot = java_lang_reflect_Method::slot(reflected);
455 }
456 Klass* k = java_lang_Class::as_Klass(mirror);
457
458 KlassHandle k1(THREAD, k);
459 // Make sure class is initialized before handing id's out to methods
460 k1()->initialize(CHECK_NULL);
461 Method* m = InstanceKlass::cast(k1())->method_with_idnum(slot);
462 ret = m==NULL? NULL : m->jmethod_id(); // return NULL if reflected method deleted
463 return ret;
464 JNI_END
465
466 DT_RETURN_MARK_DECL(FromReflectedField, jfieldID
467 , HOTSPOT_JNI_FROMREFLECTEDFIELD_RETURN((uintptr_t)_ret_ref));
468
469 JNI_ENTRY(jfieldID, jni_FromReflectedField(JNIEnv *env, jobject field))
470 JNIWrapper("FromReflectedField");
471
472 HOTSPOT_JNI_FROMREFLECTEDFIELD_ENTRY(env, field);
473
474 jfieldID ret = NULL;
475 DT_RETURN_MARK(FromReflectedField, jfieldID, (const jfieldID&)ret);
476
477 // field is a handle to a java.lang.reflect.Field object
478 oop reflected = JNIHandles::resolve_non_null(field);
479 oop mirror = java_lang_reflect_Field::clazz(reflected);
480 Klass* k = java_lang_Class::as_Klass(mirror);
481 int slot = java_lang_reflect_Field::slot(reflected);
482 int modifiers = java_lang_reflect_Field::modifiers(reflected);
483
484 KlassHandle k1(THREAD, k);
485 // Make sure class is initialized before handing id's out to fields
486 k1()->initialize(CHECK_NULL);
487
488 // First check if this is a static field
489 if (modifiers & JVM_ACC_STATIC) {
490 intptr_t offset = InstanceKlass::cast(k1())->field_offset( slot );
491 JNIid* id = InstanceKlass::cast(k1())->jni_id_for(offset);
492 assert(id != NULL, "corrupt Field object");
493 debug_only(id->set_is_static_field_id();)
494 // A jfieldID for a static field is a JNIid specifying the field holder and the offset within the Klass*
495 ret = jfieldIDWorkaround::to_static_jfieldID(id);
496 return ret;
497 }
498
499 // The slot is the index of the field description in the field-array
500 // The jfieldID is the offset of the field within the object
501 // It may also have hash bits for k, if VerifyJNIFields is turned on.
502 intptr_t offset = InstanceKlass::cast(k1())->field_offset( slot );
503 assert(InstanceKlass::cast(k1())->contains_field_offset(offset), "stay within object");
504 ret = jfieldIDWorkaround::to_instance_jfieldID(k1(), offset);
505 return ret;
506 JNI_END
507
508
509 DT_RETURN_MARK_DECL(ToReflectedMethod, jobject
510 , HOTSPOT_JNI_TOREFLECTEDMETHOD_RETURN(_ret_ref));
511
512 JNI_ENTRY(jobject, jni_ToReflectedMethod(JNIEnv *env, jclass cls, jmethodID method_id, jboolean isStatic))
513 JNIWrapper("ToReflectedMethod");
514
515 HOTSPOT_JNI_TOREFLECTEDMETHOD_ENTRY(env, cls, (uintptr_t) method_id, isStatic);
516
517 jobject ret = NULL;
518 DT_RETURN_MARK(ToReflectedMethod, jobject, (const jobject&)ret);
519
520 methodHandle m (THREAD, Method::resolve_jmethod_id(method_id));
521 assert(m->is_static() == (isStatic != 0), "jni_ToReflectedMethod access flags doesn't match");
522 oop reflection_method;
523 if (m->is_initializer()) {
524 reflection_method = Reflection::new_constructor(m, CHECK_NULL);
525 } else {
526 reflection_method = Reflection::new_method(m, false, CHECK_NULL);
527 }
528 ret = JNIHandles::make_local(env, reflection_method);
529 return ret;
530 JNI_END
531
532 DT_RETURN_MARK_DECL(GetSuperclass, jclass
533 , HOTSPOT_JNI_GETSUPERCLASS_RETURN(_ret_ref));
534
535 JNI_ENTRY(jclass, jni_GetSuperclass(JNIEnv *env, jclass sub))
536 JNIWrapper("GetSuperclass");
537
538 HOTSPOT_JNI_GETSUPERCLASS_ENTRY(env, sub);
539
540 jclass obj = NULL;
541 DT_RETURN_MARK(GetSuperclass, jclass, (const jclass&)obj);
542
543 oop mirror = JNIHandles::resolve_non_null(sub);
544 // primitive classes return NULL
545 if (java_lang_Class::is_primitive(mirror)) return NULL;
546
547 // Rules of Class.getSuperClass as implemented by KLass::java_super:
548 // arrays return Object
549 // interfaces return NULL
550 // proper classes return Klass::super()
551 Klass* k = java_lang_Class::as_Klass(mirror);
552 if (k->is_interface()) return NULL;
553
554 // return mirror for superclass
555 Klass* super = k->java_super();
556 // super2 is the value computed by the compiler's getSuperClass intrinsic:
557 debug_only(Klass* super2 = ( k->is_array_klass()
558 ? SystemDictionary::Object_klass()
559 : k->super() ) );
560 assert(super == super2,
561 "java_super computation depends on interface, array, other super");
562 obj = (super == NULL) ? NULL : (jclass) JNIHandles::make_local(super->java_mirror());
563 return obj;
564 JNI_END
565
566 JNI_QUICK_ENTRY(jboolean, jni_IsAssignableFrom(JNIEnv *env, jclass sub, jclass super))
567 JNIWrapper("IsSubclassOf");
568
569 HOTSPOT_JNI_ISASSIGNABLEFROM_ENTRY(env, sub, super);
570
571 oop sub_mirror = JNIHandles::resolve_non_null(sub);
572 oop super_mirror = JNIHandles::resolve_non_null(super);
573 if (java_lang_Class::is_primitive(sub_mirror) ||
574 java_lang_Class::is_primitive(super_mirror)) {
575 jboolean ret = (sub_mirror == super_mirror);
576
577 HOTSPOT_JNI_ISASSIGNABLEFROM_RETURN(ret);
578 return ret;
579 }
580 Klass* sub_klass = java_lang_Class::as_Klass(sub_mirror);
581 Klass* super_klass = java_lang_Class::as_Klass(super_mirror);
582 assert(sub_klass != NULL && super_klass != NULL, "invalid arguments to jni_IsAssignableFrom");
583 jboolean ret = sub_klass->is_subtype_of(super_klass) ?
584 JNI_TRUE : JNI_FALSE;
585
586 HOTSPOT_JNI_ISASSIGNABLEFROM_RETURN(ret);
587 return ret;
588 JNI_END
589
590
591 DT_RETURN_MARK_DECL(Throw, jint
592 , HOTSPOT_JNI_THROW_RETURN(_ret_ref));
593
594 JNI_ENTRY(jint, jni_Throw(JNIEnv *env, jthrowable obj))
595 JNIWrapper("Throw");
596
597 HOTSPOT_JNI_THROW_ENTRY(env, obj);
598
599 jint ret = JNI_OK;
600 DT_RETURN_MARK(Throw, jint, (const jint&)ret);
601
602 THROW_OOP_(JNIHandles::resolve(obj), JNI_OK);
603 ShouldNotReachHere();
604 return 0; // Mute compiler.
605 JNI_END
606
607
608 DT_RETURN_MARK_DECL(ThrowNew, jint
609 , HOTSPOT_JNI_THROWNEW_RETURN(_ret_ref));
610
611 JNI_ENTRY(jint, jni_ThrowNew(JNIEnv *env, jclass clazz, const char *message))
612 JNIWrapper("ThrowNew");
613
614 HOTSPOT_JNI_THROWNEW_ENTRY(env, clazz, (char *) message);
615
616 jint ret = JNI_OK;
617 DT_RETURN_MARK(ThrowNew, jint, (const jint&)ret);
618
619 InstanceKlass* k = InstanceKlass::cast(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz)));
620 Symbol* name = k->name();
621 Handle class_loader (THREAD, k->class_loader());
622 Handle protection_domain (THREAD, k->protection_domain());
623 THROW_MSG_LOADER_(name, (char *)message, class_loader, protection_domain, JNI_OK);
624 ShouldNotReachHere();
625 return 0; // Mute compiler.
626 JNI_END
627
628
629 // JNI functions only transform a pending async exception to a synchronous
630 // exception in ExceptionOccurred and ExceptionCheck calls, since
631 // delivering an async exception in other places won't change the native
632 // code's control flow and would be harmful when native code further calls
633 // JNI functions with a pending exception. Async exception is also checked
634 // during the call, so ExceptionOccurred/ExceptionCheck won't return
635 // false but deliver the async exception at the very end during
636 // state transition.
637
638 static void jni_check_async_exceptions(JavaThread *thread) {
639 assert(thread == Thread::current(), "must be itself");
640 thread->check_and_handle_async_exceptions();
641 }
642
643 JNI_ENTRY_NO_PRESERVE(jthrowable, jni_ExceptionOccurred(JNIEnv *env))
644 JNIWrapper("ExceptionOccurred");
645
646 HOTSPOT_JNI_EXCEPTIONOCCURRED_ENTRY(env);
647
648 jni_check_async_exceptions(thread);
649 oop exception = thread->pending_exception();
650 jthrowable ret = (jthrowable) JNIHandles::make_local(env, exception);
651
652 HOTSPOT_JNI_EXCEPTIONOCCURRED_RETURN(ret);
653 return ret;
654 JNI_END
655
656
657 JNI_ENTRY_NO_PRESERVE(void, jni_ExceptionDescribe(JNIEnv *env))
658 JNIWrapper("ExceptionDescribe");
659
660 HOTSPOT_JNI_EXCEPTIONDESCRIBE_ENTRY(env);
661
662 if (thread->has_pending_exception()) {
663 Handle ex(thread, thread->pending_exception());
664 thread->clear_pending_exception();
665 if (ex->is_a(SystemDictionary::ThreadDeath_klass())) {
666 // Don't print anything if we are being killed.
667 } else {
668 jio_fprintf(defaultStream::error_stream(), "Exception ");
669 if (thread != NULL && thread->threadObj() != NULL) {
670 ResourceMark rm(THREAD);
671 jio_fprintf(defaultStream::error_stream(),
672 "in thread \"%s\" ", thread->get_thread_name());
673 }
674 if (ex->is_a(SystemDictionary::Throwable_klass())) {
675 JavaValue result(T_VOID);
676 JavaCalls::call_virtual(&result,
677 ex,
678 KlassHandle(THREAD,
679 SystemDictionary::Throwable_klass()),
680 vmSymbols::printStackTrace_name(),
681 vmSymbols::void_method_signature(),
682 THREAD);
683 // If an exception is thrown in the call it gets thrown away. Not much
684 // we can do with it. The native code that calls this, does not check
685 // for the exception - hence, it might still be in the thread when DestroyVM gets
686 // called, potentially causing a few asserts to trigger - since no pending exception
687 // is expected.
688 CLEAR_PENDING_EXCEPTION;
689 } else {
690 ResourceMark rm(THREAD);
691 jio_fprintf(defaultStream::error_stream(),
692 ". Uncaught exception of type %s.",
693 ex->klass()->external_name());
694 }
695 }
696 }
697
698 HOTSPOT_JNI_EXCEPTIONDESCRIBE_RETURN();
699 JNI_END
700
701
702 JNI_QUICK_ENTRY(void, jni_ExceptionClear(JNIEnv *env))
703 JNIWrapper("ExceptionClear");
704
705 HOTSPOT_JNI_EXCEPTIONCLEAR_ENTRY(env);
706
707 // The jni code might be using this API to clear java thrown exception.
708 // So just mark jvmti thread exception state as exception caught.
709 JvmtiThreadState *state = JavaThread::current()->jvmti_thread_state();
710 if (state != NULL && state->is_exception_detected()) {
711 state->set_exception_caught();
712 }
713 thread->clear_pending_exception();
714
715 HOTSPOT_JNI_EXCEPTIONCLEAR_RETURN();
716 JNI_END
717
718
719 JNI_ENTRY(void, jni_FatalError(JNIEnv *env, const char *msg))
720 JNIWrapper("FatalError");
721
722 HOTSPOT_JNI_FATALERROR_ENTRY(env, (char *) msg);
723
724 tty->print_cr("FATAL ERROR in native method: %s", msg);
725 thread->print_stack();
726 os::abort(); // Dump core and abort
727 JNI_END
728
729
730 JNI_ENTRY(jint, jni_PushLocalFrame(JNIEnv *env, jint capacity))
731 JNIWrapper("PushLocalFrame");
732
733 HOTSPOT_JNI_PUSHLOCALFRAME_ENTRY(env, capacity);
734
735 //%note jni_11
736 if (capacity < 0 ||
737 ((MaxJNILocalCapacity > 0) && (capacity > MaxJNILocalCapacity))) {
738 HOTSPOT_JNI_PUSHLOCALFRAME_RETURN((uint32_t)JNI_ERR);
739 return JNI_ERR;
740 }
741 JNIHandleBlock* old_handles = thread->active_handles();
742 JNIHandleBlock* new_handles = JNIHandleBlock::allocate_block(thread);
743 assert(new_handles != NULL, "should not be NULL");
744 new_handles->set_pop_frame_link(old_handles);
745 thread->set_active_handles(new_handles);
746 jint ret = JNI_OK;
747 HOTSPOT_JNI_PUSHLOCALFRAME_RETURN(ret);
748 return ret;
749 JNI_END
750
751
752 JNI_ENTRY(jobject, jni_PopLocalFrame(JNIEnv *env, jobject result))
753 JNIWrapper("PopLocalFrame");
754
755 HOTSPOT_JNI_POPLOCALFRAME_ENTRY(env, result);
756
757 //%note jni_11
758 Handle result_handle(thread, JNIHandles::resolve(result));
759 JNIHandleBlock* old_handles = thread->active_handles();
760 JNIHandleBlock* new_handles = old_handles->pop_frame_link();
761 if (new_handles != NULL) {
762 // As a sanity check we only release the handle blocks if the pop_frame_link is not NULL.
763 // This way code will still work if PopLocalFrame is called without a corresponding
764 // PushLocalFrame call. Note that we set the pop_frame_link to NULL explicitly, otherwise
765 // the release_block call will release the blocks.
766 thread->set_active_handles(new_handles);
767 old_handles->set_pop_frame_link(NULL); // clear link we won't release new_handles below
768 JNIHandleBlock::release_block(old_handles, thread); // may block
769 result = JNIHandles::make_local(thread, result_handle());
770 }
771 HOTSPOT_JNI_POPLOCALFRAME_RETURN(result);
772 return result;
773 JNI_END
774
775
776 JNI_ENTRY(jobject, jni_NewGlobalRef(JNIEnv *env, jobject ref))
777 JNIWrapper("NewGlobalRef");
778
779 HOTSPOT_JNI_NEWGLOBALREF_ENTRY(env, ref);
780
781 Handle ref_handle(thread, JNIHandles::resolve(ref));
782 jobject ret = JNIHandles::make_global(ref_handle);
783
784 HOTSPOT_JNI_NEWGLOBALREF_RETURN(ret);
785 return ret;
786 JNI_END
787
788 // Must be JNI_ENTRY (with HandleMark)
789 JNI_ENTRY_NO_PRESERVE(void, jni_DeleteGlobalRef(JNIEnv *env, jobject ref))
790 JNIWrapper("DeleteGlobalRef");
791
792 HOTSPOT_JNI_DELETEGLOBALREF_ENTRY(env, ref);
793
794 JNIHandles::destroy_global(ref);
795
796 HOTSPOT_JNI_DELETEGLOBALREF_RETURN();
797 JNI_END
798
799 JNI_QUICK_ENTRY(void, jni_DeleteLocalRef(JNIEnv *env, jobject obj))
800 JNIWrapper("DeleteLocalRef");
801
802 HOTSPOT_JNI_DELETELOCALREF_ENTRY(env, obj);
803
804 JNIHandles::destroy_local(obj);
805
806 HOTSPOT_JNI_DELETELOCALREF_RETURN();
807 JNI_END
808
809 JNI_QUICK_ENTRY(jboolean, jni_IsSameObject(JNIEnv *env, jobject r1, jobject r2))
810 JNIWrapper("IsSameObject");
811
812 HOTSPOT_JNI_ISSAMEOBJECT_ENTRY(env, r1, r2);
813
814 oop a = JNIHandles::resolve(r1);
815 oop b = JNIHandles::resolve(r2);
816 jboolean ret = (a == b) ? JNI_TRUE : JNI_FALSE;
817
818 HOTSPOT_JNI_ISSAMEOBJECT_RETURN(ret);
819 return ret;
820 JNI_END
821
822
823 JNI_ENTRY(jobject, jni_NewLocalRef(JNIEnv *env, jobject ref))
824 JNIWrapper("NewLocalRef");
825
826 HOTSPOT_JNI_NEWLOCALREF_ENTRY(env, ref);
827
828 jobject ret = JNIHandles::make_local(env, JNIHandles::resolve(ref));
829
830 HOTSPOT_JNI_NEWLOCALREF_RETURN(ret);
831 return ret;
832 JNI_END
833
834 JNI_LEAF(jint, jni_EnsureLocalCapacity(JNIEnv *env, jint capacity))
835 JNIWrapper("EnsureLocalCapacity");
836
837 HOTSPOT_JNI_ENSURELOCALCAPACITY_ENTRY(env, capacity);
838
839 jint ret;
840 if (capacity >= 0 &&
841 ((MaxJNILocalCapacity <= 0) || (capacity <= MaxJNILocalCapacity))) {
842 ret = JNI_OK;
843 } else {
844 ret = JNI_ERR;
845 }
846
847 HOTSPOT_JNI_ENSURELOCALCAPACITY_RETURN(ret);
848 return ret;
849 JNI_END
850
851 // Return the Handle Type
852 JNI_LEAF(jobjectRefType, jni_GetObjectRefType(JNIEnv *env, jobject obj))
853 JNIWrapper("GetObjectRefType");
854
855 HOTSPOT_JNI_GETOBJECTREFTYPE_ENTRY(env, obj);
856
857 jobjectRefType ret;
858 if (JNIHandles::is_local_handle(thread, obj) ||
859 JNIHandles::is_frame_handle(thread, obj))
860 ret = JNILocalRefType;
861 else if (JNIHandles::is_global_handle(obj))
862 ret = JNIGlobalRefType;
863 else if (JNIHandles::is_weak_global_handle(obj))
864 ret = JNIWeakGlobalRefType;
865 else
866 ret = JNIInvalidRefType;
867
868 HOTSPOT_JNI_GETOBJECTREFTYPE_RETURN((void *) ret);
869 return ret;
870 JNI_END
871
872
873 class JNI_ArgumentPusher : public SignatureIterator {
874 protected:
875 JavaCallArguments* _arguments;
876
877 virtual void get_bool () = 0;
878 virtual void get_char () = 0;
879 virtual void get_short () = 0;
880 virtual void get_byte () = 0;
881 virtual void get_int () = 0;
882 virtual void get_long () = 0;
883 virtual void get_float () = 0;
884 virtual void get_double () = 0;
885 virtual void get_object () = 0;
886
887 JNI_ArgumentPusher(Symbol* signature) : SignatureIterator(signature) {
888 this->_return_type = T_ILLEGAL;
889 _arguments = NULL;
890 }
891
892 public:
893 virtual void iterate( uint64_t fingerprint ) = 0;
894
895 void set_java_argument_object(JavaCallArguments *arguments) { _arguments = arguments; }
896
897 inline void do_bool() { if (!is_return_type()) get_bool(); }
898 inline void do_char() { if (!is_return_type()) get_char(); }
899 inline void do_short() { if (!is_return_type()) get_short(); }
900 inline void do_byte() { if (!is_return_type()) get_byte(); }
901 inline void do_int() { if (!is_return_type()) get_int(); }
902 inline void do_long() { if (!is_return_type()) get_long(); }
903 inline void do_float() { if (!is_return_type()) get_float(); }
904 inline void do_double() { if (!is_return_type()) get_double(); }
905 inline void do_object(int begin, int end) { if (!is_return_type()) get_object(); }
906 inline void do_array(int begin, int end) { if (!is_return_type()) get_object(); } // do_array uses get_object -- there is no get_array
907 inline void do_void() { }
908
909 JavaCallArguments* arguments() { return _arguments; }
910 void push_receiver(Handle h) { _arguments->push_oop(h); }
911 };
912
913
914 class JNI_ArgumentPusherVaArg : public JNI_ArgumentPusher {
915 protected:
916 va_list _ap;
917
918 inline void get_bool() { _arguments->push_int(va_arg(_ap, jint)); } // bool is coerced to int when using va_arg
919 inline void get_char() { _arguments->push_int(va_arg(_ap, jint)); } // char is coerced to int when using va_arg
920 inline void get_short() { _arguments->push_int(va_arg(_ap, jint)); } // short is coerced to int when using va_arg
921 inline void get_byte() { _arguments->push_int(va_arg(_ap, jint)); } // byte is coerced to int when using va_arg
922 inline void get_int() { _arguments->push_int(va_arg(_ap, jint)); }
923
924 // each of these paths is exercized by the various jck Call[Static,Nonvirtual,][Void,Int,..]Method[A,V,] tests
925
926 inline void get_long() { _arguments->push_long(va_arg(_ap, jlong)); }
927 inline void get_float() { _arguments->push_float((jfloat)va_arg(_ap, jdouble)); } // float is coerced to double w/ va_arg
928 inline void get_double() { _arguments->push_double(va_arg(_ap, jdouble)); }
929 inline void get_object() { jobject l = va_arg(_ap, jobject);
930 _arguments->push_oop(Handle((oop *)l, false)); }
931
932 inline void set_ap(va_list rap) {
933 va_copy(_ap, rap);
934 }
935
936 public:
937 JNI_ArgumentPusherVaArg(Symbol* signature, va_list rap)
938 : JNI_ArgumentPusher(signature) {
939 set_ap(rap);
940 }
941 JNI_ArgumentPusherVaArg(jmethodID method_id, va_list rap)
942 : JNI_ArgumentPusher(Method::resolve_jmethod_id(method_id)->signature()) {
943 set_ap(rap);
944 }
945
946 // Optimized path if we have the bitvector form of signature
947 void iterate( uint64_t fingerprint ) {
948 if (fingerprint == (uint64_t)CONST64(-1)) {
949 SignatureIterator::iterate(); // Must be too many arguments
950 } else {
951 _return_type = (BasicType)((fingerprint >> static_feature_size) &
952 result_feature_mask);
953
954 assert(fingerprint, "Fingerprint should not be 0");
955 fingerprint = fingerprint >> (static_feature_size + result_feature_size);
956 while ( 1 ) {
957 switch ( fingerprint & parameter_feature_mask ) {
958 case bool_parm:
959 case char_parm:
960 case short_parm:
961 case byte_parm:
962 case int_parm:
963 get_int();
964 break;
965 case obj_parm:
966 get_object();
967 break;
968 case long_parm:
969 get_long();
970 break;
971 case float_parm:
972 get_float();
973 break;
974 case double_parm:
975 get_double();
976 break;
977 case done_parm:
978 return;
979 break;
980 default:
981 ShouldNotReachHere();
982 break;
983 }
984 fingerprint >>= parameter_feature_size;
985 }
986 }
987 }
988 };
989
990
991 class JNI_ArgumentPusherArray : public JNI_ArgumentPusher {
992 protected:
993 const jvalue *_ap;
994
995 inline void get_bool() { _arguments->push_int((jint)(_ap++)->z); }
996 inline void get_char() { _arguments->push_int((jint)(_ap++)->c); }
997 inline void get_short() { _arguments->push_int((jint)(_ap++)->s); }
998 inline void get_byte() { _arguments->push_int((jint)(_ap++)->b); }
999 inline void get_int() { _arguments->push_int((jint)(_ap++)->i); }
1000
1001 inline void get_long() { _arguments->push_long((_ap++)->j); }
1002 inline void get_float() { _arguments->push_float((_ap++)->f); }
1003 inline void get_double() { _arguments->push_double((_ap++)->d);}
1004 inline void get_object() { _arguments->push_oop(Handle((oop *)(_ap++)->l, false)); }
1005
1006 inline void set_ap(const jvalue *rap) { _ap = rap; }
1007
1008 public:
1009 JNI_ArgumentPusherArray(Symbol* signature, const jvalue *rap)
1010 : JNI_ArgumentPusher(signature) {
1011 set_ap(rap);
1012 }
1013 JNI_ArgumentPusherArray(jmethodID method_id, const jvalue *rap)
1014 : JNI_ArgumentPusher(Method::resolve_jmethod_id(method_id)->signature()) {
1015 set_ap(rap);
1016 }
1017
1018 // Optimized path if we have the bitvector form of signature
1019 void iterate( uint64_t fingerprint ) {
1020 if (fingerprint == (uint64_t)CONST64(-1)) {
1021 SignatureIterator::iterate(); // Must be too many arguments
1022 } else {
1023 _return_type = (BasicType)((fingerprint >> static_feature_size) &
1024 result_feature_mask);
1025 assert(fingerprint, "Fingerprint should not be 0");
1026 fingerprint = fingerprint >> (static_feature_size + result_feature_size);
1027 while ( 1 ) {
1028 switch ( fingerprint & parameter_feature_mask ) {
1029 case bool_parm:
1030 get_bool();
1031 break;
1032 case char_parm:
1033 get_char();
1034 break;
1035 case short_parm:
1036 get_short();
1037 break;
1038 case byte_parm:
1039 get_byte();
1040 break;
1041 case int_parm:
1042 get_int();
1043 break;
1044 case obj_parm:
1045 get_object();
1046 break;
1047 case long_parm:
1048 get_long();
1049 break;
1050 case float_parm:
1051 get_float();
1052 break;
1053 case double_parm:
1054 get_double();
1055 break;
1056 case done_parm:
1057 return;
1058 break;
1059 default:
1060 ShouldNotReachHere();
1061 break;
1062 }
1063 fingerprint >>= parameter_feature_size;
1064 }
1065 }
1066 }
1067 };
1068
1069
1070 enum JNICallType {
1071 JNI_STATIC,
1072 JNI_VIRTUAL,
1073 JNI_NONVIRTUAL
1074 };
1075
1076
1077
1078 static void jni_invoke_static(JNIEnv *env, JavaValue* result, jobject receiver, JNICallType call_type, jmethodID method_id, JNI_ArgumentPusher *args, TRAPS) {
1079 methodHandle method(THREAD, Method::resolve_jmethod_id(method_id));
1080
1081 // Create object to hold arguments for the JavaCall, and associate it with
1082 // the jni parser
1083 ResourceMark rm(THREAD);
1084 int number_of_parameters = method->size_of_parameters();
1085 JavaCallArguments java_args(number_of_parameters);
1086 args->set_java_argument_object(&java_args);
1087
1088 assert(method->is_static(), "method should be static");
1089
1090 // Fill out JavaCallArguments object
1091 args->iterate( Fingerprinter(method).fingerprint() );
1092 // Initialize result type
1093 result->set_type(args->get_ret_type());
1094
1095 // Invoke the method. Result is returned as oop.
1096 JavaCalls::call(result, method, &java_args, CHECK);
1097
1098 // Convert result
1099 if (result->get_type() == T_OBJECT || result->get_type() == T_ARRAY) {
1100 result->set_jobject(JNIHandles::make_local(env, (oop) result->get_jobject()));
1101 }
1102 }
1103
1104
1105 static void jni_invoke_nonstatic(JNIEnv *env, JavaValue* result, jobject receiver, JNICallType call_type, jmethodID method_id, JNI_ArgumentPusher *args, TRAPS) {
1106 oop recv = JNIHandles::resolve(receiver);
1107 if (recv == NULL) {
1108 THROW(vmSymbols::java_lang_NullPointerException());
1109 }
1110 Handle h_recv(THREAD, recv);
1111
1112 int number_of_parameters;
1113 Method* selected_method;
1114 {
1115 Method* m = Method::resolve_jmethod_id(method_id);
1116 number_of_parameters = m->size_of_parameters();
1117 Klass* holder = m->method_holder();
1118 if (call_type != JNI_VIRTUAL) {
1119 selected_method = m;
1120 } else if (!m->has_itable_index()) {
1121 // non-interface call -- for that little speed boost, don't handlize
1122 debug_only(NoSafepointVerifier nosafepoint;)
1123 // jni_GetMethodID makes sure class is linked and initialized
1124 // so m should have a valid vtable index.
1125 assert(m->valid_vtable_index(), "no valid vtable index");
1126 int vtbl_index = m->vtable_index();
1127 if (vtbl_index != Method::nonvirtual_vtable_index) {
1128 selected_method = h_recv->klass()->method_at_vtable(vtbl_index);
1129 } else {
1130 // final method
1131 selected_method = m;
1132 }
1133 } else {
1134 // interface call
1135 KlassHandle h_holder(THREAD, holder);
1136
1137 int itbl_index = m->itable_index();
1138 Klass* k = h_recv->klass();
1139 selected_method = InstanceKlass::cast(k)->method_at_itable(h_holder(), itbl_index, CHECK);
1140 }
1141 }
1142
1143 methodHandle method(THREAD, selected_method);
1144
1145 // Create object to hold arguments for the JavaCall, and associate it with
1146 // the jni parser
1147 ResourceMark rm(THREAD);
1148 JavaCallArguments java_args(number_of_parameters);
1149 args->set_java_argument_object(&java_args);
1150
1151 // handle arguments
1152 assert(!method->is_static(), "method should not be static");
1153 args->push_receiver(h_recv); // Push jobject handle
1154
1155 // Fill out JavaCallArguments object
1156 args->iterate( Fingerprinter(method).fingerprint() );
1157 // Initialize result type
1158 result->set_type(args->get_ret_type());
1159
1160 // Invoke the method. Result is returned as oop.
1161 JavaCalls::call(result, method, &java_args, CHECK);
1162
1163 // Convert result
1164 if (result->get_type() == T_OBJECT || result->get_type() == T_ARRAY) {
1165 result->set_jobject(JNIHandles::make_local(env, (oop) result->get_jobject()));
1166 }
1167 }
1168
1169
1170 static instanceOop alloc_object(jclass clazz, TRAPS) {
1171 KlassHandle k(THREAD, java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz)));
1172 if (k == NULL) {
1173 ResourceMark rm(THREAD);
1174 THROW_(vmSymbols::java_lang_InstantiationException(), NULL);
1175 }
1176 k()->check_valid_for_instantiation(false, CHECK_NULL);
1177 InstanceKlass::cast(k())->initialize(CHECK_NULL);
1178 instanceOop ih = InstanceKlass::cast(k())->allocate_instance(THREAD);
1179 return ih;
1180 }
1181
1182 DT_RETURN_MARK_DECL(AllocObject, jobject
1183 , HOTSPOT_JNI_ALLOCOBJECT_RETURN(_ret_ref));
1184
1185 JNI_ENTRY(jobject, jni_AllocObject(JNIEnv *env, jclass clazz))
1186 JNIWrapper("AllocObject");
1187
1188 HOTSPOT_JNI_ALLOCOBJECT_ENTRY(env, clazz);
1189
1190 jobject ret = NULL;
1191 DT_RETURN_MARK(AllocObject, jobject, (const jobject&)ret);
1192
1193 instanceOop i = alloc_object(clazz, CHECK_NULL);
1194 ret = JNIHandles::make_local(env, i);
1195 return ret;
1196 JNI_END
1197
1198 DT_RETURN_MARK_DECL(NewObjectA, jobject
1199 , HOTSPOT_JNI_NEWOBJECTA_RETURN(_ret_ref));
1200
1201 JNI_ENTRY(jobject, jni_NewObjectA(JNIEnv *env, jclass clazz, jmethodID methodID, const jvalue *args))
1202 JNIWrapper("NewObjectA");
1203
1204 HOTSPOT_JNI_NEWOBJECTA_ENTRY(env, clazz, (uintptr_t) methodID);
1205
1206 jobject obj = NULL;
1207 DT_RETURN_MARK(NewObjectA, jobject, (const jobject)obj);
1208
1209 instanceOop i = alloc_object(clazz, CHECK_NULL);
1210 obj = JNIHandles::make_local(env, i);
1211 JavaValue jvalue(T_VOID);
1212 JNI_ArgumentPusherArray ap(methodID, args);
1213 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_NULL);
1214 return obj;
1215 JNI_END
1216
1217
1218 DT_RETURN_MARK_DECL(NewObjectV, jobject
1219 , HOTSPOT_JNI_NEWOBJECTV_RETURN(_ret_ref));
1220
1221 JNI_ENTRY(jobject, jni_NewObjectV(JNIEnv *env, jclass clazz, jmethodID methodID, va_list args))
1222 JNIWrapper("NewObjectV");
1223
1224 HOTSPOT_JNI_NEWOBJECTV_ENTRY(env, clazz, (uintptr_t) methodID);
1225
1226 jobject obj = NULL;
1227 DT_RETURN_MARK(NewObjectV, jobject, (const jobject&)obj);
1228
1229 instanceOop i = alloc_object(clazz, CHECK_NULL);
1230 obj = JNIHandles::make_local(env, i);
1231 JavaValue jvalue(T_VOID);
1232 JNI_ArgumentPusherVaArg ap(methodID, args);
1233 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_NULL);
1234 return obj;
1235 JNI_END
1236
1237
1238 DT_RETURN_MARK_DECL(NewObject, jobject
1239 , HOTSPOT_JNI_NEWOBJECT_RETURN(_ret_ref));
1240
1241 JNI_ENTRY(jobject, jni_NewObject(JNIEnv *env, jclass clazz, jmethodID methodID, ...))
1242 JNIWrapper("NewObject");
1243
1244 HOTSPOT_JNI_NEWOBJECT_ENTRY(env, clazz, (uintptr_t) methodID);
1245
1246 jobject obj = NULL;
1247 DT_RETURN_MARK(NewObject, jobject, (const jobject&)obj);
1248
1249 instanceOop i = alloc_object(clazz, CHECK_NULL);
1250 obj = JNIHandles::make_local(env, i);
1251 va_list args;
1252 va_start(args, methodID);
1253 JavaValue jvalue(T_VOID);
1254 JNI_ArgumentPusherVaArg ap(methodID, args);
1255 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_NULL);
1256 va_end(args);
1257 return obj;
1258 JNI_END
1259
1260
1261 JNI_ENTRY(jclass, jni_GetObjectClass(JNIEnv *env, jobject obj))
1262 JNIWrapper("GetObjectClass");
1263
1264 HOTSPOT_JNI_GETOBJECTCLASS_ENTRY(env, obj);
1265
1266 Klass* k = JNIHandles::resolve_non_null(obj)->klass();
1267 jclass ret =
1268 (jclass) JNIHandles::make_local(env, k->java_mirror());
1269
1270 HOTSPOT_JNI_GETOBJECTCLASS_RETURN(ret);
1271 return ret;
1272 JNI_END
1273
1274 JNI_QUICK_ENTRY(jboolean, jni_IsInstanceOf(JNIEnv *env, jobject obj, jclass clazz))
1275 JNIWrapper("IsInstanceOf");
1276
1277 HOTSPOT_JNI_ISINSTANCEOF_ENTRY(env, obj, clazz);
1278
1279 jboolean ret = JNI_TRUE;
1280 if (obj != NULL) {
1281 ret = JNI_FALSE;
1282 Klass* k = java_lang_Class::as_Klass(
1283 JNIHandles::resolve_non_null(clazz));
1284 if (k != NULL) {
1285 ret = JNIHandles::resolve_non_null(obj)->is_a(k) ? JNI_TRUE : JNI_FALSE;
1286 }
1287 }
1288
1289 HOTSPOT_JNI_ISINSTANCEOF_RETURN(ret);
1290 return ret;
1291 JNI_END
1292
1293
1294 static jmethodID get_method_id(JNIEnv *env, jclass clazz, const char *name_str,
1295 const char *sig, bool is_static, TRAPS) {
1296 // %%%% This code should probably just call into a method in the LinkResolver
1297 //
1298 // The class should have been loaded (we have an instance of the class
1299 // passed in) so the method and signature should already be in the symbol
1300 // table. If they're not there, the method doesn't exist.
1301 const char *name_to_probe = (name_str == NULL)
1302 ? vmSymbols::object_initializer_name()->as_C_string()
1303 : name_str;
1304 TempNewSymbol name = SymbolTable::probe(name_to_probe, (int)strlen(name_to_probe));
1305 TempNewSymbol signature = SymbolTable::probe(sig, (int)strlen(sig));
1306
1307 if (name == NULL || signature == NULL) {
1308 THROW_MSG_0(vmSymbols::java_lang_NoSuchMethodError(), name_str);
1309 }
1310
1311 // Throw a NoSuchMethodError exception if we have an instance of a
1312 // primitive java.lang.Class
1313 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(clazz))) {
1314 THROW_MSG_0(vmSymbols::java_lang_NoSuchMethodError(), name_str);
1315 }
1316
1317 KlassHandle klass(THREAD,
1318 java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz)));
1319
1320 // Make sure class is linked and initialized before handing id's out to
1321 // Method*s.
1322 klass()->initialize(CHECK_NULL);
1323
1324 Method* m;
1325 if (name == vmSymbols::object_initializer_name() ||
1326 name == vmSymbols::class_initializer_name()) {
1327 // Never search superclasses for constructors
1328 if (klass->is_instance_klass()) {
1329 m = InstanceKlass::cast(klass())->find_method(name, signature);
1330 } else {
1331 m = NULL;
1332 }
1333 } else {
1334 m = klass->lookup_method(name, signature);
1335 if (m == NULL && klass->is_instance_klass()) {
1336 m = InstanceKlass::cast(klass())->lookup_method_in_ordered_interfaces(name, signature);
1337 }
1338 }
1339 if (m == NULL || (m->is_static() != is_static)) {
1340 THROW_MSG_0(vmSymbols::java_lang_NoSuchMethodError(), name_str);
1341 }
1342 return m->jmethod_id();
1343 }
1344
1345
1346 JNI_ENTRY(jmethodID, jni_GetMethodID(JNIEnv *env, jclass clazz,
1347 const char *name, const char *sig))
1348 JNIWrapper("GetMethodID");
1349 HOTSPOT_JNI_GETMETHODID_ENTRY(env, clazz, (char *) name, (char *) sig);
1350 jmethodID ret = get_method_id(env, clazz, name, sig, false, thread);
1351 HOTSPOT_JNI_GETMETHODID_RETURN((uintptr_t) ret);
1352 return ret;
1353 JNI_END
1354
1355
1356 JNI_ENTRY(jmethodID, jni_GetStaticMethodID(JNIEnv *env, jclass clazz,
1357 const char *name, const char *sig))
1358 JNIWrapper("GetStaticMethodID");
1359 HOTSPOT_JNI_GETSTATICMETHODID_ENTRY(env, (char *) clazz, (char *) name, (char *)sig);
1360 jmethodID ret = get_method_id(env, clazz, name, sig, true, thread);
1361 HOTSPOT_JNI_GETSTATICMETHODID_RETURN((uintptr_t) ret);
1362 return ret;
1363 JNI_END
1364
1365
1366
1367 //
1368 // Calling Methods
1369 //
1370
1371
1372 #define DEFINE_CALLMETHOD(ResultType, Result, Tag \
1373 , EntryProbe, ReturnProbe) \
1374 \
1375 DT_RETURN_MARK_DECL_FOR(Result, Call##Result##Method, ResultType \
1376 , ReturnProbe); \
1377 \
1378 JNI_ENTRY(ResultType, \
1379 jni_Call##Result##Method(JNIEnv *env, jobject obj, jmethodID methodID, ...)) \
1380 JNIWrapper("Call" XSTR(Result) "Method"); \
1381 \
1382 EntryProbe; \
1383 ResultType ret = 0;\
1384 DT_RETURN_MARK_FOR(Result, Call##Result##Method, ResultType, \
1385 (const ResultType&)ret);\
1386 \
1387 va_list args; \
1388 va_start(args, methodID); \
1389 JavaValue jvalue(Tag); \
1390 JNI_ArgumentPusherVaArg ap(methodID, args); \
1391 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK_0); \
1392 va_end(args); \
1393 ret = jvalue.get_##ResultType(); \
1394 return ret;\
1395 JNI_END
1396
1397 // the runtime type of subword integral basic types is integer
1398 DEFINE_CALLMETHOD(jboolean, Boolean, T_BOOLEAN
1399 , HOTSPOT_JNI_CALLBOOLEANMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1400 HOTSPOT_JNI_CALLBOOLEANMETHOD_RETURN(_ret_ref))
1401 DEFINE_CALLMETHOD(jbyte, Byte, T_BYTE
1402 , HOTSPOT_JNI_CALLBYTEMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1403 HOTSPOT_JNI_CALLBYTEMETHOD_RETURN(_ret_ref))
1404 DEFINE_CALLMETHOD(jchar, Char, T_CHAR
1405 , HOTSPOT_JNI_CALLCHARMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1406 HOTSPOT_JNI_CALLCHARMETHOD_RETURN(_ret_ref))
1407 DEFINE_CALLMETHOD(jshort, Short, T_SHORT
1408 , HOTSPOT_JNI_CALLSHORTMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1409 HOTSPOT_JNI_CALLSHORTMETHOD_RETURN(_ret_ref))
1410
1411 DEFINE_CALLMETHOD(jobject, Object, T_OBJECT
1412 , HOTSPOT_JNI_CALLOBJECTMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1413 HOTSPOT_JNI_CALLOBJECTMETHOD_RETURN(_ret_ref))
1414 DEFINE_CALLMETHOD(jint, Int, T_INT,
1415 HOTSPOT_JNI_CALLINTMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1416 HOTSPOT_JNI_CALLINTMETHOD_RETURN(_ret_ref))
1417 DEFINE_CALLMETHOD(jlong, Long, T_LONG
1418 , HOTSPOT_JNI_CALLLONGMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1419 HOTSPOT_JNI_CALLLONGMETHOD_RETURN(_ret_ref))
1420 // Float and double probes don't return value because dtrace doesn't currently support it
1421 DEFINE_CALLMETHOD(jfloat, Float, T_FLOAT
1422 , HOTSPOT_JNI_CALLFLOATMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1423 HOTSPOT_JNI_CALLFLOATMETHOD_RETURN())
1424 DEFINE_CALLMETHOD(jdouble, Double, T_DOUBLE
1425 , HOTSPOT_JNI_CALLDOUBLEMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1426 HOTSPOT_JNI_CALLDOUBLEMETHOD_RETURN())
1427
1428 #define DEFINE_CALLMETHODV(ResultType, Result, Tag \
1429 , EntryProbe, ReturnProbe) \
1430 \
1431 DT_RETURN_MARK_DECL_FOR(Result, Call##Result##MethodV, ResultType \
1432 , ReturnProbe); \
1433 \
1434 JNI_ENTRY(ResultType, \
1435 jni_Call##Result##MethodV(JNIEnv *env, jobject obj, jmethodID methodID, va_list args)) \
1436 JNIWrapper("Call" XSTR(Result) "MethodV"); \
1437 \
1438 EntryProbe;\
1439 ResultType ret = 0;\
1440 DT_RETURN_MARK_FOR(Result, Call##Result##MethodV, ResultType, \
1441 (const ResultType&)ret);\
1442 \
1443 JavaValue jvalue(Tag); \
1444 JNI_ArgumentPusherVaArg ap(methodID, args); \
1445 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK_0); \
1446 ret = jvalue.get_##ResultType(); \
1447 return ret;\
1448 JNI_END
1449
1450 // the runtime type of subword integral basic types is integer
1451 DEFINE_CALLMETHODV(jboolean, Boolean, T_BOOLEAN
1452 , HOTSPOT_JNI_CALLBOOLEANMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1453 HOTSPOT_JNI_CALLBOOLEANMETHODV_RETURN(_ret_ref))
1454 DEFINE_CALLMETHODV(jbyte, Byte, T_BYTE
1455 , HOTSPOT_JNI_CALLBYTEMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1456 HOTSPOT_JNI_CALLBYTEMETHODV_RETURN(_ret_ref))
1457 DEFINE_CALLMETHODV(jchar, Char, T_CHAR
1458 , HOTSPOT_JNI_CALLCHARMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1459 HOTSPOT_JNI_CALLCHARMETHODV_RETURN(_ret_ref))
1460 DEFINE_CALLMETHODV(jshort, Short, T_SHORT
1461 , HOTSPOT_JNI_CALLSHORTMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1462 HOTSPOT_JNI_CALLSHORTMETHODV_RETURN(_ret_ref))
1463
1464 DEFINE_CALLMETHODV(jobject, Object, T_OBJECT
1465 , HOTSPOT_JNI_CALLOBJECTMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1466 HOTSPOT_JNI_CALLOBJECTMETHODV_RETURN(_ret_ref))
1467 DEFINE_CALLMETHODV(jint, Int, T_INT,
1468 HOTSPOT_JNI_CALLINTMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1469 HOTSPOT_JNI_CALLINTMETHODV_RETURN(_ret_ref))
1470 DEFINE_CALLMETHODV(jlong, Long, T_LONG
1471 , HOTSPOT_JNI_CALLLONGMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1472 HOTSPOT_JNI_CALLLONGMETHODV_RETURN(_ret_ref))
1473 // Float and double probes don't return value because dtrace doesn't currently support it
1474 DEFINE_CALLMETHODV(jfloat, Float, T_FLOAT
1475 , HOTSPOT_JNI_CALLFLOATMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1476 HOTSPOT_JNI_CALLFLOATMETHODV_RETURN())
1477 DEFINE_CALLMETHODV(jdouble, Double, T_DOUBLE
1478 , HOTSPOT_JNI_CALLDOUBLEMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1479 HOTSPOT_JNI_CALLDOUBLEMETHODV_RETURN())
1480
1481 #define DEFINE_CALLMETHODA(ResultType, Result, Tag \
1482 , EntryProbe, ReturnProbe) \
1483 \
1484 DT_RETURN_MARK_DECL_FOR(Result, Call##Result##MethodA, ResultType \
1485 , ReturnProbe); \
1486 \
1487 JNI_ENTRY(ResultType, \
1488 jni_Call##Result##MethodA(JNIEnv *env, jobject obj, jmethodID methodID, const jvalue *args)) \
1489 JNIWrapper("Call" XSTR(Result) "MethodA"); \
1490 EntryProbe; \
1491 ResultType ret = 0;\
1492 DT_RETURN_MARK_FOR(Result, Call##Result##MethodA, ResultType, \
1493 (const ResultType&)ret);\
1494 \
1495 JavaValue jvalue(Tag); \
1496 JNI_ArgumentPusherArray ap(methodID, args); \
1497 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK_0); \
1498 ret = jvalue.get_##ResultType(); \
1499 return ret;\
1500 JNI_END
1501
1502 // the runtime type of subword integral basic types is integer
1503 DEFINE_CALLMETHODA(jboolean, Boolean, T_BOOLEAN
1504 , HOTSPOT_JNI_CALLBOOLEANMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1505 HOTSPOT_JNI_CALLBOOLEANMETHODA_RETURN(_ret_ref))
1506 DEFINE_CALLMETHODA(jbyte, Byte, T_BYTE
1507 , HOTSPOT_JNI_CALLBYTEMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1508 HOTSPOT_JNI_CALLBYTEMETHODA_RETURN(_ret_ref))
1509 DEFINE_CALLMETHODA(jchar, Char, T_CHAR
1510 , HOTSPOT_JNI_CALLCHARMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1511 HOTSPOT_JNI_CALLCHARMETHODA_RETURN(_ret_ref))
1512 DEFINE_CALLMETHODA(jshort, Short, T_SHORT
1513 , HOTSPOT_JNI_CALLSHORTMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1514 HOTSPOT_JNI_CALLSHORTMETHODA_RETURN(_ret_ref))
1515
1516 DEFINE_CALLMETHODA(jobject, Object, T_OBJECT
1517 , HOTSPOT_JNI_CALLOBJECTMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1518 HOTSPOT_JNI_CALLOBJECTMETHODA_RETURN(_ret_ref))
1519 DEFINE_CALLMETHODA(jint, Int, T_INT,
1520 HOTSPOT_JNI_CALLINTMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1521 HOTSPOT_JNI_CALLINTMETHODA_RETURN(_ret_ref))
1522 DEFINE_CALLMETHODA(jlong, Long, T_LONG
1523 , HOTSPOT_JNI_CALLLONGMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1524 HOTSPOT_JNI_CALLLONGMETHODA_RETURN(_ret_ref))
1525 // Float and double probes don't return value because dtrace doesn't currently support it
1526 DEFINE_CALLMETHODA(jfloat, Float, T_FLOAT
1527 , HOTSPOT_JNI_CALLFLOATMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1528 HOTSPOT_JNI_CALLFLOATMETHODA_RETURN())
1529 DEFINE_CALLMETHODA(jdouble, Double, T_DOUBLE
1530 , HOTSPOT_JNI_CALLDOUBLEMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1531 HOTSPOT_JNI_CALLDOUBLEMETHODA_RETURN())
1532
1533 DT_VOID_RETURN_MARK_DECL(CallVoidMethod, HOTSPOT_JNI_CALLVOIDMETHOD_RETURN());
1534 DT_VOID_RETURN_MARK_DECL(CallVoidMethodV, HOTSPOT_JNI_CALLVOIDMETHODV_RETURN());
1535 DT_VOID_RETURN_MARK_DECL(CallVoidMethodA, HOTSPOT_JNI_CALLVOIDMETHODA_RETURN());
1536
1537
1538 JNI_ENTRY(void, jni_CallVoidMethod(JNIEnv *env, jobject obj, jmethodID methodID, ...))
1539 JNIWrapper("CallVoidMethod");
1540 HOTSPOT_JNI_CALLVOIDMETHOD_ENTRY(env, obj, (uintptr_t) methodID);
1541 DT_VOID_RETURN_MARK(CallVoidMethod);
1542
1543 va_list args;
1544 va_start(args, methodID);
1545 JavaValue jvalue(T_VOID);
1546 JNI_ArgumentPusherVaArg ap(methodID, args);
1547 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK);
1548 va_end(args);
1549 JNI_END
1550
1551
1552 JNI_ENTRY(void, jni_CallVoidMethodV(JNIEnv *env, jobject obj, jmethodID methodID, va_list args))
1553 JNIWrapper("CallVoidMethodV");
1554 HOTSPOT_JNI_CALLVOIDMETHODV_ENTRY(env, obj, (uintptr_t) methodID);
1555 DT_VOID_RETURN_MARK(CallVoidMethodV);
1556
1557 JavaValue jvalue(T_VOID);
1558 JNI_ArgumentPusherVaArg ap(methodID, args);
1559 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK);
1560 JNI_END
1561
1562
1563 JNI_ENTRY(void, jni_CallVoidMethodA(JNIEnv *env, jobject obj, jmethodID methodID, const jvalue *args))
1564 JNIWrapper("CallVoidMethodA");
1565 HOTSPOT_JNI_CALLVOIDMETHODA_ENTRY(env, obj, (uintptr_t) methodID);
1566 DT_VOID_RETURN_MARK(CallVoidMethodA);
1567
1568 JavaValue jvalue(T_VOID);
1569 JNI_ArgumentPusherArray ap(methodID, args);
1570 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK);
1571 JNI_END
1572
1573
1574
1575 #define DEFINE_CALLNONVIRTUALMETHOD(ResultType, Result, Tag \
1576 , EntryProbe, ReturnProbe) \
1577 \
1578 DT_RETURN_MARK_DECL_FOR(Result, CallNonvirtual##Result##Method, ResultType \
1579 , ReturnProbe);\
1580 \
1581 JNI_ENTRY(ResultType, \
1582 jni_CallNonvirtual##Result##Method(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, ...)) \
1583 JNIWrapper("CallNonvitual" XSTR(Result) "Method"); \
1584 \
1585 EntryProbe;\
1586 ResultType ret;\
1587 DT_RETURN_MARK_FOR(Result, CallNonvirtual##Result##Method, ResultType, \
1588 (const ResultType&)ret);\
1589 \
1590 va_list args; \
1591 va_start(args, methodID); \
1592 JavaValue jvalue(Tag); \
1593 JNI_ArgumentPusherVaArg ap(methodID, args); \
1594 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_0); \
1595 va_end(args); \
1596 ret = jvalue.get_##ResultType(); \
1597 return ret;\
1598 JNI_END
1599
1600 // the runtime type of subword integral basic types is integer
1601 DEFINE_CALLNONVIRTUALMETHOD(jboolean, Boolean, T_BOOLEAN
1602 , HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1603 HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHOD_RETURN(_ret_ref))
1604 DEFINE_CALLNONVIRTUALMETHOD(jbyte, Byte, T_BYTE
1605 , HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1606 HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHOD_RETURN(_ret_ref))
1607 DEFINE_CALLNONVIRTUALMETHOD(jchar, Char, T_CHAR
1608 , HOTSPOT_JNI_CALLNONVIRTUALCHARMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1609 HOTSPOT_JNI_CALLNONVIRTUALCHARMETHOD_RETURN(_ret_ref))
1610 DEFINE_CALLNONVIRTUALMETHOD(jshort, Short, T_SHORT
1611 , HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1612 HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHOD_RETURN(_ret_ref))
1613
1614 DEFINE_CALLNONVIRTUALMETHOD(jobject, Object, T_OBJECT
1615 , HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1616 HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHOD_RETURN(_ret_ref))
1617 DEFINE_CALLNONVIRTUALMETHOD(jint, Int, T_INT
1618 , HOTSPOT_JNI_CALLNONVIRTUALINTMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1619 HOTSPOT_JNI_CALLNONVIRTUALINTMETHOD_RETURN(_ret_ref))
1620 DEFINE_CALLNONVIRTUALMETHOD(jlong, Long, T_LONG
1621 , HOTSPOT_JNI_CALLNONVIRTUALLONGMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1622 // Float and double probes don't return value because dtrace doesn't currently support it
1623 HOTSPOT_JNI_CALLNONVIRTUALLONGMETHOD_RETURN(_ret_ref))
1624 DEFINE_CALLNONVIRTUALMETHOD(jfloat, Float, T_FLOAT
1625 , HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1626 HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHOD_RETURN())
1627 DEFINE_CALLNONVIRTUALMETHOD(jdouble, Double, T_DOUBLE
1628 , HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1629 HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHOD_RETURN())
1630
1631 #define DEFINE_CALLNONVIRTUALMETHODV(ResultType, Result, Tag \
1632 , EntryProbe, ReturnProbe) \
1633 \
1634 DT_RETURN_MARK_DECL_FOR(Result, CallNonvirtual##Result##MethodV, ResultType \
1635 , ReturnProbe);\
1636 \
1637 JNI_ENTRY(ResultType, \
1638 jni_CallNonvirtual##Result##MethodV(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, va_list args)) \
1639 JNIWrapper("CallNonvitual" XSTR(Result) "MethodV"); \
1640 \
1641 EntryProbe;\
1642 ResultType ret;\
1643 DT_RETURN_MARK_FOR(Result, CallNonvirtual##Result##MethodV, ResultType, \
1644 (const ResultType&)ret);\
1645 \
1646 JavaValue jvalue(Tag); \
1647 JNI_ArgumentPusherVaArg ap(methodID, args); \
1648 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_0); \
1649 ret = jvalue.get_##ResultType(); \
1650 return ret;\
1651 JNI_END
1652
1653 // the runtime type of subword integral basic types is integer
1654 DEFINE_CALLNONVIRTUALMETHODV(jboolean, Boolean, T_BOOLEAN
1655 , HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1656 HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHODV_RETURN(_ret_ref))
1657 DEFINE_CALLNONVIRTUALMETHODV(jbyte, Byte, T_BYTE
1658 , HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1659 HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHODV_RETURN(_ret_ref))
1660 DEFINE_CALLNONVIRTUALMETHODV(jchar, Char, T_CHAR
1661 , HOTSPOT_JNI_CALLNONVIRTUALCHARMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1662 HOTSPOT_JNI_CALLNONVIRTUALCHARMETHODV_RETURN(_ret_ref))
1663 DEFINE_CALLNONVIRTUALMETHODV(jshort, Short, T_SHORT
1664 , HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1665 HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHODV_RETURN(_ret_ref))
1666
1667 DEFINE_CALLNONVIRTUALMETHODV(jobject, Object, T_OBJECT
1668 , HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1669 HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHODV_RETURN(_ret_ref))
1670 DEFINE_CALLNONVIRTUALMETHODV(jint, Int, T_INT
1671 , HOTSPOT_JNI_CALLNONVIRTUALINTMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1672 HOTSPOT_JNI_CALLNONVIRTUALINTMETHODV_RETURN(_ret_ref))
1673 DEFINE_CALLNONVIRTUALMETHODV(jlong, Long, T_LONG
1674 , HOTSPOT_JNI_CALLNONVIRTUALLONGMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1675 // Float and double probes don't return value because dtrace doesn't currently support it
1676 HOTSPOT_JNI_CALLNONVIRTUALLONGMETHODV_RETURN(_ret_ref))
1677 DEFINE_CALLNONVIRTUALMETHODV(jfloat, Float, T_FLOAT
1678 , HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1679 HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHODV_RETURN())
1680 DEFINE_CALLNONVIRTUALMETHODV(jdouble, Double, T_DOUBLE
1681 , HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1682 HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHODV_RETURN())
1683
1684 #define DEFINE_CALLNONVIRTUALMETHODA(ResultType, Result, Tag \
1685 , EntryProbe, ReturnProbe) \
1686 \
1687 DT_RETURN_MARK_DECL_FOR(Result, CallNonvirtual##Result##MethodA, ResultType \
1688 , ReturnProbe);\
1689 \
1690 JNI_ENTRY(ResultType, \
1691 jni_CallNonvirtual##Result##MethodA(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, const jvalue *args)) \
1692 JNIWrapper("CallNonvitual" XSTR(Result) "MethodA"); \
1693 \
1694 EntryProbe;\
1695 ResultType ret;\
1696 DT_RETURN_MARK_FOR(Result, CallNonvirtual##Result##MethodA, ResultType, \
1697 (const ResultType&)ret);\
1698 \
1699 JavaValue jvalue(Tag); \
1700 JNI_ArgumentPusherArray ap(methodID, args); \
1701 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_0); \
1702 ret = jvalue.get_##ResultType(); \
1703 return ret;\
1704 JNI_END
1705
1706 // the runtime type of subword integral basic types is integer
1707 DEFINE_CALLNONVIRTUALMETHODA(jboolean, Boolean, T_BOOLEAN
1708 , HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1709 HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHODA_RETURN(_ret_ref))
1710 DEFINE_CALLNONVIRTUALMETHODA(jbyte, Byte, T_BYTE
1711 , HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1712 HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHODA_RETURN(_ret_ref))
1713 DEFINE_CALLNONVIRTUALMETHODA(jchar, Char, T_CHAR
1714 , HOTSPOT_JNI_CALLNONVIRTUALCHARMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1715 HOTSPOT_JNI_CALLNONVIRTUALCHARMETHODA_RETURN(_ret_ref))
1716 DEFINE_CALLNONVIRTUALMETHODA(jshort, Short, T_SHORT
1717 , HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1718 HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHODA_RETURN(_ret_ref))
1719
1720 DEFINE_CALLNONVIRTUALMETHODA(jobject, Object, T_OBJECT
1721 , HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1722 HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHODA_RETURN(_ret_ref))
1723 DEFINE_CALLNONVIRTUALMETHODA(jint, Int, T_INT
1724 , HOTSPOT_JNI_CALLNONVIRTUALINTMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1725 HOTSPOT_JNI_CALLNONVIRTUALINTMETHODA_RETURN(_ret_ref))
1726 DEFINE_CALLNONVIRTUALMETHODA(jlong, Long, T_LONG
1727 , HOTSPOT_JNI_CALLNONVIRTUALLONGMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1728 // Float and double probes don't return value because dtrace doesn't currently support it
1729 HOTSPOT_JNI_CALLNONVIRTUALLONGMETHODA_RETURN(_ret_ref))
1730 DEFINE_CALLNONVIRTUALMETHODA(jfloat, Float, T_FLOAT
1731 , HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1732 HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHODA_RETURN())
1733 DEFINE_CALLNONVIRTUALMETHODA(jdouble, Double, T_DOUBLE
1734 , HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1735 HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHODA_RETURN())
1736
1737 DT_VOID_RETURN_MARK_DECL(CallNonvirtualVoidMethod
1738 , HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHOD_RETURN());
1739 DT_VOID_RETURN_MARK_DECL(CallNonvirtualVoidMethodV
1740 , HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHODV_RETURN());
1741 DT_VOID_RETURN_MARK_DECL(CallNonvirtualVoidMethodA
1742 , HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHODA_RETURN());
1743
1744 JNI_ENTRY(void, jni_CallNonvirtualVoidMethod(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, ...))
1745 JNIWrapper("CallNonvirtualVoidMethod");
1746
1747 HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHOD_ENTRY(env, obj, cls, (uintptr_t) methodID);
1748 DT_VOID_RETURN_MARK(CallNonvirtualVoidMethod);
1749
1750 va_list args;
1751 va_start(args, methodID);
1752 JavaValue jvalue(T_VOID);
1753 JNI_ArgumentPusherVaArg ap(methodID, args);
1754 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK);
1755 va_end(args);
1756 JNI_END
1757
1758
1759 JNI_ENTRY(void, jni_CallNonvirtualVoidMethodV(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, va_list args))
1760 JNIWrapper("CallNonvirtualVoidMethodV");
1761
1762 HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHODV_ENTRY(
1763 env, obj, cls, (uintptr_t) methodID);
1764 DT_VOID_RETURN_MARK(CallNonvirtualVoidMethodV);
1765
1766 JavaValue jvalue(T_VOID);
1767 JNI_ArgumentPusherVaArg ap(methodID, args);
1768 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK);
1769 JNI_END
1770
1771
1772 JNI_ENTRY(void, jni_CallNonvirtualVoidMethodA(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, const jvalue *args))
1773 JNIWrapper("CallNonvirtualVoidMethodA");
1774 HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHODA_ENTRY(
1775 env, obj, cls, (uintptr_t) methodID);
1776 DT_VOID_RETURN_MARK(CallNonvirtualVoidMethodA);
1777 JavaValue jvalue(T_VOID);
1778 JNI_ArgumentPusherArray ap(methodID, args);
1779 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK);
1780 JNI_END
1781
1782
1783
1784 #define DEFINE_CALLSTATICMETHOD(ResultType, Result, Tag \
1785 , EntryProbe, ResultProbe) \
1786 \
1787 DT_RETURN_MARK_DECL_FOR(Result, CallStatic##Result##Method, ResultType \
1788 , ResultProbe); \
1789 \
1790 JNI_ENTRY(ResultType, \
1791 jni_CallStatic##Result##Method(JNIEnv *env, jclass cls, jmethodID methodID, ...)) \
1792 JNIWrapper("CallStatic" XSTR(Result) "Method"); \
1793 \
1794 EntryProbe; \
1795 ResultType ret = 0;\
1796 DT_RETURN_MARK_FOR(Result, CallStatic##Result##Method, ResultType, \
1797 (const ResultType&)ret);\
1798 \
1799 va_list args; \
1800 va_start(args, methodID); \
1801 JavaValue jvalue(Tag); \
1802 JNI_ArgumentPusherVaArg ap(methodID, args); \
1803 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK_0); \
1804 va_end(args); \
1805 ret = jvalue.get_##ResultType(); \
1806 return ret;\
1807 JNI_END
1808
1809 // the runtime type of subword integral basic types is integer
1810 DEFINE_CALLSTATICMETHOD(jboolean, Boolean, T_BOOLEAN
1811 , HOTSPOT_JNI_CALLSTATICBOOLEANMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1812 HOTSPOT_JNI_CALLSTATICBOOLEANMETHOD_RETURN(_ret_ref));
1813 DEFINE_CALLSTATICMETHOD(jbyte, Byte, T_BYTE
1814 , HOTSPOT_JNI_CALLSTATICBYTEMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1815 HOTSPOT_JNI_CALLSTATICBYTEMETHOD_RETURN(_ret_ref));
1816 DEFINE_CALLSTATICMETHOD(jchar, Char, T_CHAR
1817 , HOTSPOT_JNI_CALLSTATICCHARMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1818 HOTSPOT_JNI_CALLSTATICCHARMETHOD_RETURN(_ret_ref));
1819 DEFINE_CALLSTATICMETHOD(jshort, Short, T_SHORT
1820 , HOTSPOT_JNI_CALLSTATICSHORTMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1821 HOTSPOT_JNI_CALLSTATICSHORTMETHOD_RETURN(_ret_ref));
1822
1823 DEFINE_CALLSTATICMETHOD(jobject, Object, T_OBJECT
1824 , HOTSPOT_JNI_CALLSTATICOBJECTMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1825 HOTSPOT_JNI_CALLSTATICOBJECTMETHOD_RETURN(_ret_ref));
1826 DEFINE_CALLSTATICMETHOD(jint, Int, T_INT
1827 , HOTSPOT_JNI_CALLSTATICINTMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1828 HOTSPOT_JNI_CALLSTATICINTMETHOD_RETURN(_ret_ref));
1829 DEFINE_CALLSTATICMETHOD(jlong, Long, T_LONG
1830 , HOTSPOT_JNI_CALLSTATICLONGMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1831 HOTSPOT_JNI_CALLSTATICLONGMETHOD_RETURN(_ret_ref));
1832 // Float and double probes don't return value because dtrace doesn't currently support it
1833 DEFINE_CALLSTATICMETHOD(jfloat, Float, T_FLOAT
1834 , HOTSPOT_JNI_CALLSTATICFLOATMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1835 HOTSPOT_JNI_CALLSTATICFLOATMETHOD_RETURN());
1836 DEFINE_CALLSTATICMETHOD(jdouble, Double, T_DOUBLE
1837 , HOTSPOT_JNI_CALLSTATICDOUBLEMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1838 HOTSPOT_JNI_CALLSTATICDOUBLEMETHOD_RETURN());
1839
1840 #define DEFINE_CALLSTATICMETHODV(ResultType, Result, Tag \
1841 , EntryProbe, ResultProbe) \
1842 \
1843 DT_RETURN_MARK_DECL_FOR(Result, CallStatic##Result##MethodV, ResultType \
1844 , ResultProbe); \
1845 \
1846 JNI_ENTRY(ResultType, \
1847 jni_CallStatic##Result##MethodV(JNIEnv *env, jclass cls, jmethodID methodID, va_list args)) \
1848 JNIWrapper("CallStatic" XSTR(Result) "MethodV"); \
1849 \
1850 EntryProbe; \
1851 ResultType ret = 0;\
1852 DT_RETURN_MARK_FOR(Result, CallStatic##Result##MethodV, ResultType, \
1853 (const ResultType&)ret);\
1854 \
1855 JavaValue jvalue(Tag); \
1856 JNI_ArgumentPusherVaArg ap(methodID, args); \
1857 /* Make sure class is initialized before trying to invoke its method */ \
1858 KlassHandle k(THREAD, java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls))); \
1859 k()->initialize(CHECK_0); \
1860 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK_0); \
1861 va_end(args); \
1862 ret = jvalue.get_##ResultType(); \
1863 return ret;\
1864 JNI_END
1865
1866 // the runtime type of subword integral basic types is integer
1867 DEFINE_CALLSTATICMETHODV(jboolean, Boolean, T_BOOLEAN
1868 , HOTSPOT_JNI_CALLSTATICBOOLEANMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1869 HOTSPOT_JNI_CALLSTATICBOOLEANMETHODV_RETURN(_ret_ref));
1870 DEFINE_CALLSTATICMETHODV(jbyte, Byte, T_BYTE
1871 , HOTSPOT_JNI_CALLSTATICBYTEMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1872 HOTSPOT_JNI_CALLSTATICBYTEMETHODV_RETURN(_ret_ref));
1873 DEFINE_CALLSTATICMETHODV(jchar, Char, T_CHAR
1874 , HOTSPOT_JNI_CALLSTATICCHARMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1875 HOTSPOT_JNI_CALLSTATICCHARMETHODV_RETURN(_ret_ref));
1876 DEFINE_CALLSTATICMETHODV(jshort, Short, T_SHORT
1877 , HOTSPOT_JNI_CALLSTATICSHORTMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1878 HOTSPOT_JNI_CALLSTATICSHORTMETHODV_RETURN(_ret_ref));
1879
1880 DEFINE_CALLSTATICMETHODV(jobject, Object, T_OBJECT
1881 , HOTSPOT_JNI_CALLSTATICOBJECTMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1882 HOTSPOT_JNI_CALLSTATICOBJECTMETHODV_RETURN(_ret_ref));
1883 DEFINE_CALLSTATICMETHODV(jint, Int, T_INT
1884 , HOTSPOT_JNI_CALLSTATICINTMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1885 HOTSPOT_JNI_CALLSTATICINTMETHODV_RETURN(_ret_ref));
1886 DEFINE_CALLSTATICMETHODV(jlong, Long, T_LONG
1887 , HOTSPOT_JNI_CALLSTATICLONGMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1888 HOTSPOT_JNI_CALLSTATICLONGMETHODV_RETURN(_ret_ref));
1889 // Float and double probes don't return value because dtrace doesn't currently support it
1890 DEFINE_CALLSTATICMETHODV(jfloat, Float, T_FLOAT
1891 , HOTSPOT_JNI_CALLSTATICFLOATMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1892 HOTSPOT_JNI_CALLSTATICFLOATMETHODV_RETURN());
1893 DEFINE_CALLSTATICMETHODV(jdouble, Double, T_DOUBLE
1894 , HOTSPOT_JNI_CALLSTATICDOUBLEMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1895 HOTSPOT_JNI_CALLSTATICDOUBLEMETHODV_RETURN());
1896
1897 #define DEFINE_CALLSTATICMETHODA(ResultType, Result, Tag \
1898 , EntryProbe, ResultProbe) \
1899 \
1900 DT_RETURN_MARK_DECL_FOR(Result, CallStatic##Result##MethodA, ResultType \
1901 , ResultProbe); \
1902 \
1903 JNI_ENTRY(ResultType, \
1904 jni_CallStatic##Result##MethodA(JNIEnv *env, jclass cls, jmethodID methodID, const jvalue *args)) \
1905 JNIWrapper("CallStatic" XSTR(Result) "MethodA"); \
1906 \
1907 EntryProbe; \
1908 ResultType ret = 0;\
1909 DT_RETURN_MARK_FOR(Result, CallStatic##Result##MethodA, ResultType, \
1910 (const ResultType&)ret);\
1911 \
1912 JavaValue jvalue(Tag); \
1913 JNI_ArgumentPusherArray ap(methodID, args); \
1914 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK_0); \
1915 ret = jvalue.get_##ResultType(); \
1916 return ret;\
1917 JNI_END
1918
1919 // the runtime type of subword integral basic types is integer
1920 DEFINE_CALLSTATICMETHODA(jboolean, Boolean, T_BOOLEAN
1921 , HOTSPOT_JNI_CALLSTATICBOOLEANMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1922 HOTSPOT_JNI_CALLSTATICBOOLEANMETHODA_RETURN(_ret_ref));
1923 DEFINE_CALLSTATICMETHODA(jbyte, Byte, T_BYTE
1924 , HOTSPOT_JNI_CALLSTATICBYTEMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1925 HOTSPOT_JNI_CALLSTATICBYTEMETHODA_RETURN(_ret_ref));
1926 DEFINE_CALLSTATICMETHODA(jchar, Char, T_CHAR
1927 , HOTSPOT_JNI_CALLSTATICCHARMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1928 HOTSPOT_JNI_CALLSTATICCHARMETHODA_RETURN(_ret_ref));
1929 DEFINE_CALLSTATICMETHODA(jshort, Short, T_SHORT
1930 , HOTSPOT_JNI_CALLSTATICSHORTMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1931 HOTSPOT_JNI_CALLSTATICSHORTMETHODA_RETURN(_ret_ref));
1932
1933 DEFINE_CALLSTATICMETHODA(jobject, Object, T_OBJECT
1934 , HOTSPOT_JNI_CALLSTATICOBJECTMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1935 HOTSPOT_JNI_CALLSTATICOBJECTMETHODA_RETURN(_ret_ref));
1936 DEFINE_CALLSTATICMETHODA(jint, Int, T_INT
1937 , HOTSPOT_JNI_CALLSTATICINTMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1938 HOTSPOT_JNI_CALLSTATICINTMETHODA_RETURN(_ret_ref));
1939 DEFINE_CALLSTATICMETHODA(jlong, Long, T_LONG
1940 , HOTSPOT_JNI_CALLSTATICLONGMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1941 HOTSPOT_JNI_CALLSTATICLONGMETHODA_RETURN(_ret_ref));
1942 // Float and double probes don't return value because dtrace doesn't currently support it
1943 DEFINE_CALLSTATICMETHODA(jfloat, Float, T_FLOAT
1944 , HOTSPOT_JNI_CALLSTATICFLOATMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1945 HOTSPOT_JNI_CALLSTATICFLOATMETHODA_RETURN());
1946 DEFINE_CALLSTATICMETHODA(jdouble, Double, T_DOUBLE
1947 , HOTSPOT_JNI_CALLSTATICDOUBLEMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1948 HOTSPOT_JNI_CALLSTATICDOUBLEMETHODA_RETURN());
1949
1950 DT_VOID_RETURN_MARK_DECL(CallStaticVoidMethod
1951 , HOTSPOT_JNI_CALLSTATICVOIDMETHOD_RETURN());
1952 DT_VOID_RETURN_MARK_DECL(CallStaticVoidMethodV
1953 , HOTSPOT_JNI_CALLSTATICVOIDMETHODV_RETURN());
1954 DT_VOID_RETURN_MARK_DECL(CallStaticVoidMethodA
1955 , HOTSPOT_JNI_CALLSTATICVOIDMETHODA_RETURN());
1956
1957 JNI_ENTRY(void, jni_CallStaticVoidMethod(JNIEnv *env, jclass cls, jmethodID methodID, ...))
1958 JNIWrapper("CallStaticVoidMethod");
1959 HOTSPOT_JNI_CALLSTATICVOIDMETHOD_ENTRY(env, cls, (uintptr_t) methodID);
1960 DT_VOID_RETURN_MARK(CallStaticVoidMethod);
1961
1962 va_list args;
1963 va_start(args, methodID);
1964 JavaValue jvalue(T_VOID);
1965 JNI_ArgumentPusherVaArg ap(methodID, args);
1966 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK);
1967 va_end(args);
1968 JNI_END
1969
1970
1971 JNI_ENTRY(void, jni_CallStaticVoidMethodV(JNIEnv *env, jclass cls, jmethodID methodID, va_list args))
1972 JNIWrapper("CallStaticVoidMethodV");
1973 HOTSPOT_JNI_CALLSTATICVOIDMETHODV_ENTRY(env, cls, (uintptr_t) methodID);
1974 DT_VOID_RETURN_MARK(CallStaticVoidMethodV);
1975
1976 JavaValue jvalue(T_VOID);
1977 JNI_ArgumentPusherVaArg ap(methodID, args);
1978 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK);
1979 JNI_END
1980
1981
1982 JNI_ENTRY(void, jni_CallStaticVoidMethodA(JNIEnv *env, jclass cls, jmethodID methodID, const jvalue *args))
1983 JNIWrapper("CallStaticVoidMethodA");
1984 HOTSPOT_JNI_CALLSTATICVOIDMETHODA_ENTRY(env, cls, (uintptr_t) methodID);
1985 DT_VOID_RETURN_MARK(CallStaticVoidMethodA);
1986
1987 JavaValue jvalue(T_VOID);
1988 JNI_ArgumentPusherArray ap(methodID, args);
1989 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK);
1990 JNI_END
1991
1992
1993 //
1994 // Accessing Fields
1995 //
1996
1997
1998 DT_RETURN_MARK_DECL(GetFieldID, jfieldID
1999 , HOTSPOT_JNI_GETFIELDID_RETURN((uintptr_t)_ret_ref));
2000
2001 JNI_ENTRY(jfieldID, jni_GetFieldID(JNIEnv *env, jclass clazz,
2002 const char *name, const char *sig))
2003 JNIWrapper("GetFieldID");
2004 HOTSPOT_JNI_GETFIELDID_ENTRY(env, clazz, (char *) name, (char *) sig);
2005 jfieldID ret = 0;
2006 DT_RETURN_MARK(GetFieldID, jfieldID, (const jfieldID&)ret);
2007
2008 // The class should have been loaded (we have an instance of the class
2009 // passed in) so the field and signature should already be in the symbol
2010 // table. If they're not there, the field doesn't exist.
2011 TempNewSymbol fieldname = SymbolTable::probe(name, (int)strlen(name));
2012 TempNewSymbol signame = SymbolTable::probe(sig, (int)strlen(sig));
2013 if (fieldname == NULL || signame == NULL) {
2014 THROW_MSG_0(vmSymbols::java_lang_NoSuchFieldError(), (char*) name);
2015 }
2016 KlassHandle k(THREAD,
2017 java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz)));
2018 // Make sure class is initialized before handing id's out to fields
2019 k()->initialize(CHECK_NULL);
2020
2021 fieldDescriptor fd;
2022 if (!k()->is_instance_klass() ||
2023 !InstanceKlass::cast(k())->find_field(fieldname, signame, false, &fd)) {
2024 THROW_MSG_0(vmSymbols::java_lang_NoSuchFieldError(), (char*) name);
2025 }
2026
2027 // A jfieldID for a non-static field is simply the offset of the field within the instanceOop
2028 // It may also have hash bits for k, if VerifyJNIFields is turned on.
2029 ret = jfieldIDWorkaround::to_instance_jfieldID(k(), fd.offset());
2030 return ret;
2031 JNI_END
2032
2033
2034 JNI_ENTRY(jobject, jni_GetObjectField(JNIEnv *env, jobject obj, jfieldID fieldID))
2035 JNIWrapper("GetObjectField");
2036 HOTSPOT_JNI_GETOBJECTFIELD_ENTRY(env, obj, (uintptr_t) fieldID);
2037 oop o = JNIHandles::resolve_non_null(obj);
2038 Klass* k = o->klass();
2039 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID);
2040 // Keep JVMTI addition small and only check enabled flag here.
2041 // jni_GetField_probe() assumes that is okay to create handles.
2042 if (JvmtiExport::should_post_field_access()) {
2043 o = JvmtiExport::jni_GetField_probe(thread, obj, o, k, fieldID, false);
2044 }
2045 jobject ret = JNIHandles::make_local(env, o->obj_field(offset));
2046 #if INCLUDE_ALL_GCS
2047 // If G1 is enabled and we are accessing the value of the referent
2048 // field in a reference object then we need to register a non-null
2049 // referent with the SATB barrier.
2050 if (UseG1GC) {
2051 bool needs_barrier = false;
2052
2053 if (ret != NULL &&
2054 offset == java_lang_ref_Reference::referent_offset &&
2055 InstanceKlass::cast(k)->reference_type() != REF_NONE) {
2056 assert(InstanceKlass::cast(k)->is_subclass_of(SystemDictionary::Reference_klass()), "sanity");
2057 needs_barrier = true;
2058 }
2059
2060 if (needs_barrier) {
2061 oop referent = JNIHandles::resolve(ret);
2062 G1SATBCardTableModRefBS::enqueue(referent);
2063 }
2064 }
2065 #endif // INCLUDE_ALL_GCS
2066 HOTSPOT_JNI_GETOBJECTFIELD_RETURN(ret);
2067 return ret;
2068 JNI_END
2069
2070
2071
2072 #define DEFINE_GETFIELD(Return,Fieldname,Result \
2073 , EntryProbe, ReturnProbe) \
2074 \
2075 DT_RETURN_MARK_DECL_FOR(Result, Get##Result##Field, Return \
2076 , ReturnProbe); \
2077 \
2078 JNI_QUICK_ENTRY(Return, jni_Get##Result##Field(JNIEnv *env, jobject obj, jfieldID fieldID)) \
2079 JNIWrapper("Get" XSTR(Result) "Field"); \
2080 \
2081 EntryProbe; \
2082 Return ret = 0;\
2083 DT_RETURN_MARK_FOR(Result, Get##Result##Field, Return, (const Return&)ret);\
2084 \
2085 oop o = JNIHandles::resolve_non_null(obj); \
2086 Klass* k = o->klass(); \
2087 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID); \
2088 /* Keep JVMTI addition small and only check enabled flag here. */ \
2089 /* jni_GetField_probe_nh() assumes that is not okay to create handles */ \
2090 /* and creates a ResetNoHandleMark. */ \
2091 if (JvmtiExport::should_post_field_access()) { \
2092 o = JvmtiExport::jni_GetField_probe_nh(thread, obj, o, k, fieldID, false); \
2093 } \
2094 ret = o->Fieldname##_field(offset); \
2095 return ret; \
2096 JNI_END
2097
2098 DEFINE_GETFIELD(jboolean, bool, Boolean
2099 , HOTSPOT_JNI_GETBOOLEANFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2100 HOTSPOT_JNI_GETBOOLEANFIELD_RETURN(_ret_ref))
2101 DEFINE_GETFIELD(jbyte, byte, Byte
2102 , HOTSPOT_JNI_GETBYTEFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2103 HOTSPOT_JNI_GETBYTEFIELD_RETURN(_ret_ref))
2104 DEFINE_GETFIELD(jchar, char, Char
2105 , HOTSPOT_JNI_GETCHARFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2106 HOTSPOT_JNI_GETCHARFIELD_RETURN(_ret_ref))
2107 DEFINE_GETFIELD(jshort, short, Short
2108 , HOTSPOT_JNI_GETSHORTFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2109 HOTSPOT_JNI_GETSHORTFIELD_RETURN(_ret_ref))
2110 DEFINE_GETFIELD(jint, int, Int
2111 , HOTSPOT_JNI_GETINTFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2112 HOTSPOT_JNI_GETINTFIELD_RETURN(_ret_ref))
2113 DEFINE_GETFIELD(jlong, long, Long
2114 , HOTSPOT_JNI_GETLONGFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2115 HOTSPOT_JNI_GETLONGFIELD_RETURN(_ret_ref))
2116 // Float and double probes don't return value because dtrace doesn't currently support it
2117 DEFINE_GETFIELD(jfloat, float, Float
2118 , HOTSPOT_JNI_GETFLOATFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2119 HOTSPOT_JNI_GETFLOATFIELD_RETURN())
2120 DEFINE_GETFIELD(jdouble, double, Double
2121 , HOTSPOT_JNI_GETDOUBLEFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2122 HOTSPOT_JNI_GETDOUBLEFIELD_RETURN())
2123
2124 address jni_GetBooleanField_addr() {
2125 return (address)jni_GetBooleanField;
2126 }
2127 address jni_GetByteField_addr() {
2128 return (address)jni_GetByteField;
2129 }
2130 address jni_GetCharField_addr() {
2131 return (address)jni_GetCharField;
2132 }
2133 address jni_GetShortField_addr() {
2134 return (address)jni_GetShortField;
2135 }
2136 address jni_GetIntField_addr() {
2137 return (address)jni_GetIntField;
2138 }
2139 address jni_GetLongField_addr() {
2140 return (address)jni_GetLongField;
2141 }
2142 address jni_GetFloatField_addr() {
2143 return (address)jni_GetFloatField;
2144 }
2145 address jni_GetDoubleField_addr() {
2146 return (address)jni_GetDoubleField;
2147 }
2148
2149 JNI_QUICK_ENTRY(void, jni_SetObjectField(JNIEnv *env, jobject obj, jfieldID fieldID, jobject value))
2150 JNIWrapper("SetObjectField");
2151 HOTSPOT_JNI_SETOBJECTFIELD_ENTRY(env, obj, (uintptr_t) fieldID, value);
2152 oop o = JNIHandles::resolve_non_null(obj);
2153 Klass* k = o->klass();
2154 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID);
2155 // Keep JVMTI addition small and only check enabled flag here.
2156 // jni_SetField_probe_nh() assumes that is not okay to create handles
2157 // and creates a ResetNoHandleMark.
2158 if (JvmtiExport::should_post_field_modification()) {
2159 jvalue field_value;
2160 field_value.l = value;
2161 o = JvmtiExport::jni_SetField_probe_nh(thread, obj, o, k, fieldID, false, 'L', (jvalue *)&field_value);
2162 }
2163 o->obj_field_put(offset, JNIHandles::resolve(value));
2164 HOTSPOT_JNI_SETOBJECTFIELD_RETURN();
2165 JNI_END
2166
2167
2168 #define DEFINE_SETFIELD(Argument,Fieldname,Result,SigType,unionType \
2169 , EntryProbe, ReturnProbe) \
2170 \
2171 JNI_QUICK_ENTRY(void, jni_Set##Result##Field(JNIEnv *env, jobject obj, jfieldID fieldID, Argument value)) \
2172 JNIWrapper("Set" XSTR(Result) "Field"); \
2173 \
2174 EntryProbe; \
2175 \
2176 oop o = JNIHandles::resolve_non_null(obj); \
2177 Klass* k = o->klass(); \
2178 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID); \
2179 /* Keep JVMTI addition small and only check enabled flag here. */ \
2180 /* jni_SetField_probe_nh() assumes that is not okay to create handles */ \
2181 /* and creates a ResetNoHandleMark. */ \
2182 if (JvmtiExport::should_post_field_modification()) { \
2183 jvalue field_value; \
2184 field_value.unionType = value; \
2185 o = JvmtiExport::jni_SetField_probe_nh(thread, obj, o, k, fieldID, false, SigType, (jvalue *)&field_value); \
2186 } \
2187 o->Fieldname##_field_put(offset, value); \
2188 ReturnProbe; \
2189 JNI_END
2190
2191 DEFINE_SETFIELD(jboolean, bool, Boolean, 'Z', z
2192 , HOTSPOT_JNI_SETBOOLEANFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value),
2193 HOTSPOT_JNI_SETBOOLEANFIELD_RETURN())
2194 DEFINE_SETFIELD(jbyte, byte, Byte, 'B', b
2195 , HOTSPOT_JNI_SETBYTEFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value),
2196 HOTSPOT_JNI_SETBYTEFIELD_RETURN())
2197 DEFINE_SETFIELD(jchar, char, Char, 'C', c
2198 , HOTSPOT_JNI_SETCHARFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value),
2199 HOTSPOT_JNI_SETCHARFIELD_RETURN())
2200 DEFINE_SETFIELD(jshort, short, Short, 'S', s
2201 , HOTSPOT_JNI_SETSHORTFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value),
2202 HOTSPOT_JNI_SETSHORTFIELD_RETURN())
2203 DEFINE_SETFIELD(jint, int, Int, 'I', i
2204 , HOTSPOT_JNI_SETINTFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value),
2205 HOTSPOT_JNI_SETINTFIELD_RETURN())
2206 DEFINE_SETFIELD(jlong, long, Long, 'J', j
2207 , HOTSPOT_JNI_SETLONGFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value),
2208 HOTSPOT_JNI_SETLONGFIELD_RETURN())
2209 // Float and double probes don't return value because dtrace doesn't currently support it
2210 DEFINE_SETFIELD(jfloat, float, Float, 'F', f
2211 , HOTSPOT_JNI_SETFLOATFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2212 HOTSPOT_JNI_SETFLOATFIELD_RETURN())
2213 DEFINE_SETFIELD(jdouble, double, Double, 'D', d
2214 , HOTSPOT_JNI_SETDOUBLEFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2215 HOTSPOT_JNI_SETDOUBLEFIELD_RETURN())
2216
2217 DT_RETURN_MARK_DECL(ToReflectedField, jobject
2218 , HOTSPOT_JNI_TOREFLECTEDFIELD_RETURN(_ret_ref));
2219
2220 JNI_ENTRY(jobject, jni_ToReflectedField(JNIEnv *env, jclass cls, jfieldID fieldID, jboolean isStatic))
2221 JNIWrapper("ToReflectedField");
2222 HOTSPOT_JNI_TOREFLECTEDFIELD_ENTRY(env, cls, (uintptr_t) fieldID, isStatic);
2223 jobject ret = NULL;
2224 DT_RETURN_MARK(ToReflectedField, jobject, (const jobject&)ret);
2225
2226 fieldDescriptor fd;
2227 bool found = false;
2228 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2229
2230 assert(jfieldIDWorkaround::is_static_jfieldID(fieldID) == (isStatic != 0), "invalid fieldID");
2231
2232 if (isStatic) {
2233 // Static field. The fieldID a JNIid specifying the field holder and the offset within the Klass*.
2234 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID);
2235 assert(id->is_static_field_id(), "invalid static field id");
2236 found = id->find_local_field(&fd);
2237 } else {
2238 // Non-static field. The fieldID is really the offset of the field within the instanceOop.
2239 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID);
2240 found = InstanceKlass::cast(k)->find_field_from_offset(offset, false, &fd);
2241 }
2242 assert(found, "bad fieldID passed into jni_ToReflectedField");
2243 oop reflected = Reflection::new_field(&fd, CHECK_NULL);
2244 ret = JNIHandles::make_local(env, reflected);
2245 return ret;
2246 JNI_END
2247
2248
2249 //
2250 // Accessing Static Fields
2251 //
2252 DT_RETURN_MARK_DECL(GetStaticFieldID, jfieldID
2253 , HOTSPOT_JNI_GETSTATICFIELDID_RETURN((uintptr_t)_ret_ref));
2254
2255 JNI_ENTRY(jfieldID, jni_GetStaticFieldID(JNIEnv *env, jclass clazz,
2256 const char *name, const char *sig))
2257 JNIWrapper("GetStaticFieldID");
2258 HOTSPOT_JNI_GETSTATICFIELDID_ENTRY(env, clazz, (char *) name, (char *) sig);
2259 jfieldID ret = NULL;
2260 DT_RETURN_MARK(GetStaticFieldID, jfieldID, (const jfieldID&)ret);
2261
2262 // The class should have been loaded (we have an instance of the class
2263 // passed in) so the field and signature should already be in the symbol
2264 // table. If they're not there, the field doesn't exist.
2265 TempNewSymbol fieldname = SymbolTable::probe(name, (int)strlen(name));
2266 TempNewSymbol signame = SymbolTable::probe(sig, (int)strlen(sig));
2267 if (fieldname == NULL || signame == NULL) {
2268 THROW_MSG_0(vmSymbols::java_lang_NoSuchFieldError(), (char*) name);
2269 }
2270 KlassHandle k(THREAD,
2271 java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz)));
2272 // Make sure class is initialized before handing id's out to static fields
2273 k()->initialize(CHECK_NULL);
2274
2275 fieldDescriptor fd;
2276 if (!k()->is_instance_klass() ||
2277 !InstanceKlass::cast(k())->find_field(fieldname, signame, true, &fd)) {
2278 THROW_MSG_0(vmSymbols::java_lang_NoSuchFieldError(), (char*) name);
2279 }
2280
2281 // A jfieldID for a static field is a JNIid specifying the field holder and the offset within the Klass*
2282 JNIid* id = fd.field_holder()->jni_id_for(fd.offset());
2283 debug_only(id->set_is_static_field_id();)
2284
2285 debug_only(id->verify(fd.field_holder()));
2286
2287 ret = jfieldIDWorkaround::to_static_jfieldID(id);
2288 return ret;
2289 JNI_END
2290
2291
2292 JNI_ENTRY(jobject, jni_GetStaticObjectField(JNIEnv *env, jclass clazz, jfieldID fieldID))
2293 JNIWrapper("GetStaticObjectField");
2294 HOTSPOT_JNI_GETSTATICOBJECTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID);
2295 #if INCLUDE_JNI_CHECK
2296 DEBUG_ONLY(Klass* param_k = jniCheck::validate_class(thread, clazz);)
2297 #endif // INCLUDE_JNI_CHECK
2298 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID);
2299 assert(id->is_static_field_id(), "invalid static field id");
2300 // Keep JVMTI addition small and only check enabled flag here.
2301 // jni_GetField_probe() assumes that is okay to create handles.
2302 if (JvmtiExport::should_post_field_access()) {
2303 JvmtiExport::jni_GetField_probe(thread, NULL, NULL, id->holder(), fieldID, true);
2304 }
2305 jobject ret = JNIHandles::make_local(id->holder()->java_mirror()->obj_field(id->offset()));
2306 HOTSPOT_JNI_GETSTATICOBJECTFIELD_RETURN(ret);
2307 return ret;
2308 JNI_END
2309
2310
2311 #define DEFINE_GETSTATICFIELD(Return,Fieldname,Result \
2312 , EntryProbe, ReturnProbe) \
2313 \
2314 DT_RETURN_MARK_DECL_FOR(Result, GetStatic##Result##Field, Return \
2315 , ReturnProbe); \
2316 \
2317 JNI_ENTRY(Return, jni_GetStatic##Result##Field(JNIEnv *env, jclass clazz, jfieldID fieldID)) \
2318 JNIWrapper("GetStatic" XSTR(Result) "Field"); \
2319 EntryProbe; \
2320 Return ret = 0;\
2321 DT_RETURN_MARK_FOR(Result, GetStatic##Result##Field, Return, \
2322 (const Return&)ret);\
2323 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID); \
2324 assert(id->is_static_field_id(), "invalid static field id"); \
2325 /* Keep JVMTI addition small and only check enabled flag here. */ \
2326 /* jni_GetField_probe() assumes that is okay to create handles. */ \
2327 if (JvmtiExport::should_post_field_access()) { \
2328 JvmtiExport::jni_GetField_probe(thread, NULL, NULL, id->holder(), fieldID, true); \
2329 } \
2330 ret = id->holder()->java_mirror()-> Fieldname##_field (id->offset()); \
2331 return ret;\
2332 JNI_END
2333
2334 DEFINE_GETSTATICFIELD(jboolean, bool, Boolean
2335 , HOTSPOT_JNI_GETSTATICBOOLEANFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICBOOLEANFIELD_RETURN(_ret_ref))
2336 DEFINE_GETSTATICFIELD(jbyte, byte, Byte
2337 , HOTSPOT_JNI_GETSTATICBYTEFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICBYTEFIELD_RETURN(_ret_ref) )
2338 DEFINE_GETSTATICFIELD(jchar, char, Char
2339 , HOTSPOT_JNI_GETSTATICCHARFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICCHARFIELD_RETURN(_ret_ref) )
2340 DEFINE_GETSTATICFIELD(jshort, short, Short
2341 , HOTSPOT_JNI_GETSTATICSHORTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICSHORTFIELD_RETURN(_ret_ref) )
2342 DEFINE_GETSTATICFIELD(jint, int, Int
2343 , HOTSPOT_JNI_GETSTATICINTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICINTFIELD_RETURN(_ret_ref) )
2344 DEFINE_GETSTATICFIELD(jlong, long, Long
2345 , HOTSPOT_JNI_GETSTATICLONGFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICLONGFIELD_RETURN(_ret_ref) )
2346 // Float and double probes don't return value because dtrace doesn't currently support it
2347 DEFINE_GETSTATICFIELD(jfloat, float, Float
2348 , HOTSPOT_JNI_GETSTATICFLOATFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICFLOATFIELD_RETURN() )
2349 DEFINE_GETSTATICFIELD(jdouble, double, Double
2350 , HOTSPOT_JNI_GETSTATICDOUBLEFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICDOUBLEFIELD_RETURN() )
2351
2352 JNI_ENTRY(void, jni_SetStaticObjectField(JNIEnv *env, jclass clazz, jfieldID fieldID, jobject value))
2353 JNIWrapper("SetStaticObjectField");
2354 HOTSPOT_JNI_SETSTATICOBJECTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value);
2355 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID);
2356 assert(id->is_static_field_id(), "invalid static field id");
2357 // Keep JVMTI addition small and only check enabled flag here.
2358 // jni_SetField_probe() assumes that is okay to create handles.
2359 if (JvmtiExport::should_post_field_modification()) {
2360 jvalue field_value;
2361 field_value.l = value;
2362 JvmtiExport::jni_SetField_probe(thread, NULL, NULL, id->holder(), fieldID, true, 'L', (jvalue *)&field_value);
2363 }
2364 id->holder()->java_mirror()->obj_field_put(id->offset(), JNIHandles::resolve(value));
2365 HOTSPOT_JNI_SETSTATICOBJECTFIELD_RETURN();
2366 JNI_END
2367
2368
2369
2370 #define DEFINE_SETSTATICFIELD(Argument,Fieldname,Result,SigType,unionType \
2371 , EntryProbe, ReturnProbe) \
2372 \
2373 JNI_ENTRY(void, jni_SetStatic##Result##Field(JNIEnv *env, jclass clazz, jfieldID fieldID, Argument value)) \
2374 JNIWrapper("SetStatic" XSTR(Result) "Field"); \
2375 EntryProbe; \
2376 \
2377 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID); \
2378 assert(id->is_static_field_id(), "invalid static field id"); \
2379 /* Keep JVMTI addition small and only check enabled flag here. */ \
2380 /* jni_SetField_probe() assumes that is okay to create handles. */ \
2381 if (JvmtiExport::should_post_field_modification()) { \
2382 jvalue field_value; \
2383 field_value.unionType = value; \
2384 JvmtiExport::jni_SetField_probe(thread, NULL, NULL, id->holder(), fieldID, true, SigType, (jvalue *)&field_value); \
2385 } \
2386 id->holder()->java_mirror()-> Fieldname##_field_put (id->offset(), value); \
2387 ReturnProbe;\
2388 JNI_END
2389
2390 DEFINE_SETSTATICFIELD(jboolean, bool, Boolean, 'Z', z
2391 , HOTSPOT_JNI_SETSTATICBOOLEANFIELD_ENTRY(env, clazz, (uintptr_t)fieldID, value),
2392 HOTSPOT_JNI_SETSTATICBOOLEANFIELD_RETURN())
2393 DEFINE_SETSTATICFIELD(jbyte, byte, Byte, 'B', b
2394 , HOTSPOT_JNI_SETSTATICBYTEFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value),
2395 HOTSPOT_JNI_SETSTATICBYTEFIELD_RETURN())
2396 DEFINE_SETSTATICFIELD(jchar, char, Char, 'C', c
2397 , HOTSPOT_JNI_SETSTATICCHARFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value),
2398 HOTSPOT_JNI_SETSTATICCHARFIELD_RETURN())
2399 DEFINE_SETSTATICFIELD(jshort, short, Short, 'S', s
2400 , HOTSPOT_JNI_SETSTATICSHORTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value),
2401 HOTSPOT_JNI_SETSTATICSHORTFIELD_RETURN())
2402 DEFINE_SETSTATICFIELD(jint, int, Int, 'I', i
2403 , HOTSPOT_JNI_SETSTATICINTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value),
2404 HOTSPOT_JNI_SETSTATICINTFIELD_RETURN())
2405 DEFINE_SETSTATICFIELD(jlong, long, Long, 'J', j
2406 , HOTSPOT_JNI_SETSTATICLONGFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value),
2407 HOTSPOT_JNI_SETSTATICLONGFIELD_RETURN())
2408 // Float and double probes don't return value because dtrace doesn't currently support it
2409 DEFINE_SETSTATICFIELD(jfloat, float, Float, 'F', f
2410 , HOTSPOT_JNI_SETSTATICFLOATFIELD_ENTRY(env, clazz, (uintptr_t) fieldID),
2411 HOTSPOT_JNI_SETSTATICFLOATFIELD_RETURN())
2412 DEFINE_SETSTATICFIELD(jdouble, double, Double, 'D', d
2413 , HOTSPOT_JNI_SETSTATICDOUBLEFIELD_ENTRY(env, clazz, (uintptr_t) fieldID),
2414 HOTSPOT_JNI_SETSTATICDOUBLEFIELD_RETURN())
2415
2416 //
2417 // String Operations
2418 //
2419
2420 // Unicode Interface
2421
2422 DT_RETURN_MARK_DECL(NewString, jstring
2423 , HOTSPOT_JNI_NEWSTRING_RETURN(_ret_ref));
2424
2425 JNI_ENTRY(jstring, jni_NewString(JNIEnv *env, const jchar *unicodeChars, jsize len))
2426 JNIWrapper("NewString");
2427 HOTSPOT_JNI_NEWSTRING_ENTRY(env, (uint16_t *) unicodeChars, len);
2428 jstring ret = NULL;
2429 DT_RETURN_MARK(NewString, jstring, (const jstring&)ret);
2430 oop string=java_lang_String::create_oop_from_unicode((jchar*) unicodeChars, len, CHECK_NULL);
2431 ret = (jstring) JNIHandles::make_local(env, string);
2432 return ret;
2433 JNI_END
2434
2435
2436 JNI_QUICK_ENTRY(jsize, jni_GetStringLength(JNIEnv *env, jstring string))
2437 JNIWrapper("GetStringLength");
2438 HOTSPOT_JNI_GETSTRINGLENGTH_ENTRY(env, string);
2439 jsize ret = 0;
2440 oop s = JNIHandles::resolve_non_null(string);
2441 if (java_lang_String::value(s) != NULL) {
2442 ret = java_lang_String::length(s);
2443 }
2444 HOTSPOT_JNI_GETSTRINGLENGTH_RETURN(ret);
2445 return ret;
2446 JNI_END
2447
2448
2449 JNI_QUICK_ENTRY(const jchar*, jni_GetStringChars(
2450 JNIEnv *env, jstring string, jboolean *isCopy))
2451 JNIWrapper("GetStringChars");
2452 HOTSPOT_JNI_GETSTRINGCHARS_ENTRY(env, string, (uintptr_t *) isCopy);
2453 jchar* buf = NULL;
2454 oop s = JNIHandles::resolve_non_null(string);
2455 typeArrayOop s_value = java_lang_String::value(s);
2456 if (s_value != NULL) {
2457 int s_len = java_lang_String::length(s);
2458 bool is_latin1 = java_lang_String::is_latin1(s);
2459 buf = NEW_C_HEAP_ARRAY_RETURN_NULL(jchar, s_len + 1, mtInternal); // add one for zero termination
2460 /* JNI Specification states return NULL on OOM */
2461 if (buf != NULL) {
2462 if (s_len > 0) {
2463 if (!is_latin1) {
2464 memcpy(buf, s_value->char_at_addr(0), sizeof(jchar)*s_len);
2465 } else {
2466 for (int i = 0; i < s_len; i++) {
2467 buf[i] = ((jchar) s_value->byte_at(i)) & 0xff;
2468 }
2469 }
2470 }
2471 buf[s_len] = 0;
2472 //%note jni_5
2473 if (isCopy != NULL) {
2474 *isCopy = JNI_TRUE;
2475 }
2476 }
2477 }
2478 HOTSPOT_JNI_GETSTRINGCHARS_RETURN(buf);
2479 return buf;
2480 JNI_END
2481
2482
2483 JNI_QUICK_ENTRY(void, jni_ReleaseStringChars(JNIEnv *env, jstring str, const jchar *chars))
2484 JNIWrapper("ReleaseStringChars");
2485 HOTSPOT_JNI_RELEASESTRINGCHARS_ENTRY(env, str, (uint16_t *) chars);
2486 //%note jni_6
2487 if (chars != NULL) {
2488 // Since String objects are supposed to be immutable, don't copy any
2489 // new data back. A bad user will have to go after the char array.
2490 FreeHeap((void*) chars);
2491 }
2492 HOTSPOT_JNI_RELEASESTRINGCHARS_RETURN();
2493 JNI_END
2494
2495
2496 // UTF Interface
2497
2498 DT_RETURN_MARK_DECL(NewStringUTF, jstring
2499 , HOTSPOT_JNI_NEWSTRINGUTF_RETURN(_ret_ref));
2500
2501 JNI_ENTRY(jstring, jni_NewStringUTF(JNIEnv *env, const char *bytes))
2502 JNIWrapper("NewStringUTF");
2503 HOTSPOT_JNI_NEWSTRINGUTF_ENTRY(env, (char *) bytes);
2504 jstring ret;
2505 DT_RETURN_MARK(NewStringUTF, jstring, (const jstring&)ret);
2506
2507 oop result = java_lang_String::create_oop_from_str((char*) bytes, CHECK_NULL);
2508 ret = (jstring) JNIHandles::make_local(env, result);
2509 return ret;
2510 JNI_END
2511
2512
2513 JNI_ENTRY(jsize, jni_GetStringUTFLength(JNIEnv *env, jstring string))
2514 JNIWrapper("GetStringUTFLength");
2515 HOTSPOT_JNI_GETSTRINGUTFLENGTH_ENTRY(env, string);
2516 jsize ret = 0;
2517 oop java_string = JNIHandles::resolve_non_null(string);
2518 if (java_lang_String::value(java_string) != NULL) {
2519 ret = java_lang_String::utf8_length(java_string);
2520 }
2521 HOTSPOT_JNI_GETSTRINGUTFLENGTH_RETURN(ret);
2522 return ret;
2523 JNI_END
2524
2525
2526 JNI_ENTRY(const char*, jni_GetStringUTFChars(JNIEnv *env, jstring string, jboolean *isCopy))
2527 JNIWrapper("GetStringUTFChars");
2528 HOTSPOT_JNI_GETSTRINGUTFCHARS_ENTRY(env, string, (uintptr_t *) isCopy);
2529 char* result = NULL;
2530 oop java_string = JNIHandles::resolve_non_null(string);
2531 if (java_lang_String::value(java_string) != NULL) {
2532 size_t length = java_lang_String::utf8_length(java_string);
2533 /* JNI Specification states return NULL on OOM */
2534 result = AllocateHeap(length + 1, mtInternal, 0, AllocFailStrategy::RETURN_NULL);
2535 if (result != NULL) {
2536 java_lang_String::as_utf8_string(java_string, result, (int) length + 1);
2537 if (isCopy != NULL) {
2538 *isCopy = JNI_TRUE;
2539 }
2540 }
2541 }
2542 HOTSPOT_JNI_GETSTRINGUTFCHARS_RETURN(result);
2543 return result;
2544 JNI_END
2545
2546
2547 JNI_LEAF(void, jni_ReleaseStringUTFChars(JNIEnv *env, jstring str, const char *chars))
2548 JNIWrapper("ReleaseStringUTFChars");
2549 HOTSPOT_JNI_RELEASESTRINGUTFCHARS_ENTRY(env, str, (char *) chars);
2550 if (chars != NULL) {
2551 FreeHeap((char*) chars);
2552 }
2553 HOTSPOT_JNI_RELEASESTRINGUTFCHARS_RETURN();
2554 JNI_END
2555
2556
2557 JNI_QUICK_ENTRY(jsize, jni_GetArrayLength(JNIEnv *env, jarray array))
2558 JNIWrapper("GetArrayLength");
2559 HOTSPOT_JNI_GETARRAYLENGTH_ENTRY(env, array);
2560 arrayOop a = arrayOop(JNIHandles::resolve_non_null(array));
2561 assert(a->is_array(), "must be array");
2562 jsize ret = a->length();
2563 HOTSPOT_JNI_GETARRAYLENGTH_RETURN(ret);
2564 return ret;
2565 JNI_END
2566
2567
2568 //
2569 // Object Array Operations
2570 //
2571
2572 DT_RETURN_MARK_DECL(NewObjectArray, jobjectArray
2573 , HOTSPOT_JNI_NEWOBJECTARRAY_RETURN(_ret_ref));
2574
2575 JNI_ENTRY(jobjectArray, jni_NewObjectArray(JNIEnv *env, jsize length, jclass elementClass, jobject initialElement))
2576 JNIWrapper("NewObjectArray");
2577 HOTSPOT_JNI_NEWOBJECTARRAY_ENTRY(env, length, elementClass, initialElement);
2578 jobjectArray ret = NULL;
2579 DT_RETURN_MARK(NewObjectArray, jobjectArray, (const jobjectArray&)ret);
2580 KlassHandle ek(THREAD, java_lang_Class::as_Klass(JNIHandles::resolve_non_null(elementClass)));
2581 Klass* ako = ek()->array_klass(CHECK_NULL);
2582 KlassHandle ak = KlassHandle(THREAD, ako);
2583 ObjArrayKlass::cast(ak())->initialize(CHECK_NULL);
2584 objArrayOop result = ObjArrayKlass::cast(ak())->allocate(length, CHECK_NULL);
2585 oop initial_value = JNIHandles::resolve(initialElement);
2586 if (initial_value != NULL) { // array already initialized with NULL
2587 for (int index = 0; index < length; index++) {
2588 result->obj_at_put(index, initial_value);
2589 }
2590 }
2591 ret = (jobjectArray) JNIHandles::make_local(env, result);
2592 return ret;
2593 JNI_END
2594
2595 DT_RETURN_MARK_DECL(GetObjectArrayElement, jobject
2596 , HOTSPOT_JNI_GETOBJECTARRAYELEMENT_RETURN(_ret_ref));
2597
2598 JNI_ENTRY(jobject, jni_GetObjectArrayElement(JNIEnv *env, jobjectArray array, jsize index))
2599 JNIWrapper("GetObjectArrayElement");
2600 HOTSPOT_JNI_GETOBJECTARRAYELEMENT_ENTRY(env, array, index);
2601 jobject ret = NULL;
2602 DT_RETURN_MARK(GetObjectArrayElement, jobject, (const jobject&)ret);
2603 objArrayOop a = objArrayOop(JNIHandles::resolve_non_null(array));
2604 if (a->is_within_bounds(index)) {
2605 ret = JNIHandles::make_local(env, a->obj_at(index));
2606 return ret;
2607 } else {
2608 char buf[jintAsStringSize];
2609 sprintf(buf, "%d", index);
2610 THROW_MSG_0(vmSymbols::java_lang_ArrayIndexOutOfBoundsException(), buf);
2611 }
2612 JNI_END
2613
2614 DT_VOID_RETURN_MARK_DECL(SetObjectArrayElement
2615 , HOTSPOT_JNI_SETOBJECTARRAYELEMENT_RETURN());
2616
2617 JNI_ENTRY(void, jni_SetObjectArrayElement(JNIEnv *env, jobjectArray array, jsize index, jobject value))
2618 JNIWrapper("SetObjectArrayElement");
2619 HOTSPOT_JNI_SETOBJECTARRAYELEMENT_ENTRY(env, array, index, value);
2620 DT_VOID_RETURN_MARK(SetObjectArrayElement);
2621
2622 objArrayOop a = objArrayOop(JNIHandles::resolve_non_null(array));
2623 oop v = JNIHandles::resolve(value);
2624 if (a->is_within_bounds(index)) {
2625 if (v == NULL || v->is_a(ObjArrayKlass::cast(a->klass())->element_klass())) {
2626 a->obj_at_put(index, v);
2627 } else {
2628 THROW(vmSymbols::java_lang_ArrayStoreException());
2629 }
2630 } else {
2631 char buf[jintAsStringSize];
2632 sprintf(buf, "%d", index);
2633 THROW_MSG(vmSymbols::java_lang_ArrayIndexOutOfBoundsException(), buf);
2634 }
2635 JNI_END
2636
2637
2638
2639 #define DEFINE_NEWSCALARARRAY(Return,Allocator,Result \
2640 ,EntryProbe,ReturnProbe) \
2641 \
2642 DT_RETURN_MARK_DECL(New##Result##Array, Return \
2643 , ReturnProbe); \
2644 \
2645 JNI_ENTRY(Return, \
2646 jni_New##Result##Array(JNIEnv *env, jsize len)) \
2647 JNIWrapper("New" XSTR(Result) "Array"); \
2648 EntryProbe; \
2649 Return ret = NULL;\
2650 DT_RETURN_MARK(New##Result##Array, Return, (const Return&)ret);\
2651 \
2652 oop obj= oopFactory::Allocator(len, CHECK_0); \
2653 ret = (Return) JNIHandles::make_local(env, obj); \
2654 return ret;\
2655 JNI_END
2656
2657 DEFINE_NEWSCALARARRAY(jbooleanArray, new_boolArray, Boolean,
2658 HOTSPOT_JNI_NEWBOOLEANARRAY_ENTRY(env, len),
2659 HOTSPOT_JNI_NEWBOOLEANARRAY_RETURN(_ret_ref))
2660 DEFINE_NEWSCALARARRAY(jbyteArray, new_byteArray, Byte,
2661 HOTSPOT_JNI_NEWBYTEARRAY_ENTRY(env, len),
2662 HOTSPOT_JNI_NEWBYTEARRAY_RETURN(_ret_ref))
2663 DEFINE_NEWSCALARARRAY(jshortArray, new_shortArray, Short,
2664 HOTSPOT_JNI_NEWSHORTARRAY_ENTRY(env, len),
2665 HOTSPOT_JNI_NEWSHORTARRAY_RETURN(_ret_ref))
2666 DEFINE_NEWSCALARARRAY(jcharArray, new_charArray, Char,
2667 HOTSPOT_JNI_NEWCHARARRAY_ENTRY(env, len),
2668 HOTSPOT_JNI_NEWCHARARRAY_RETURN(_ret_ref))
2669 DEFINE_NEWSCALARARRAY(jintArray, new_intArray, Int,
2670 HOTSPOT_JNI_NEWINTARRAY_ENTRY(env, len),
2671 HOTSPOT_JNI_NEWINTARRAY_RETURN(_ret_ref))
2672 DEFINE_NEWSCALARARRAY(jlongArray, new_longArray, Long,
2673 HOTSPOT_JNI_NEWLONGARRAY_ENTRY(env, len),
2674 HOTSPOT_JNI_NEWLONGARRAY_RETURN(_ret_ref))
2675 DEFINE_NEWSCALARARRAY(jfloatArray, new_singleArray, Float,
2676 HOTSPOT_JNI_NEWFLOATARRAY_ENTRY(env, len),
2677 HOTSPOT_JNI_NEWFLOATARRAY_RETURN(_ret_ref))
2678 DEFINE_NEWSCALARARRAY(jdoubleArray, new_doubleArray, Double,
2679 HOTSPOT_JNI_NEWDOUBLEARRAY_ENTRY(env, len),
2680 HOTSPOT_JNI_NEWDOUBLEARRAY_RETURN(_ret_ref))
2681
2682 // Return an address which will fault if the caller writes to it.
2683
2684 static char* get_bad_address() {
2685 static char* bad_address = NULL;
2686 if (bad_address == NULL) {
2687 size_t size = os::vm_allocation_granularity();
2688 bad_address = os::reserve_memory(size);
2689 if (bad_address != NULL) {
2690 os::protect_memory(bad_address, size, os::MEM_PROT_READ,
2691 /*is_committed*/false);
2692 MemTracker::record_virtual_memory_type((void*)bad_address, mtInternal);
2693 }
2694 }
2695 return bad_address;
2696 }
2697
2698
2699
2700 #define DEFINE_GETSCALARARRAYELEMENTS(ElementTag,ElementType,Result, Tag \
2701 , EntryProbe, ReturnProbe) \
2702 \
2703 JNI_QUICK_ENTRY(ElementType*, \
2704 jni_Get##Result##ArrayElements(JNIEnv *env, ElementType##Array array, jboolean *isCopy)) \
2705 JNIWrapper("Get" XSTR(Result) "ArrayElements"); \
2706 EntryProbe; \
2707 /* allocate an chunk of memory in c land */ \
2708 typeArrayOop a = typeArrayOop(JNIHandles::resolve_non_null(array)); \
2709 ElementType* result; \
2710 int len = a->length(); \
2711 if (len == 0) { \
2712 /* Empty array: legal but useless, can't return NULL. \
2713 * Return a pointer to something useless. \
2714 * Avoid asserts in typeArrayOop. */ \
2715 result = (ElementType*)get_bad_address(); \
2716 } else { \
2717 /* JNI Specification states return NULL on OOM */ \
2718 result = NEW_C_HEAP_ARRAY_RETURN_NULL(ElementType, len, mtInternal); \
2719 if (result != NULL) { \
2720 /* copy the array to the c chunk */ \
2721 memcpy(result, a->Tag##_at_addr(0), sizeof(ElementType)*len); \
2722 if (isCopy) { \
2723 *isCopy = JNI_TRUE; \
2724 } \
2725 } \
2726 } \
2727 ReturnProbe; \
2728 return result; \
2729 JNI_END
2730
2731 DEFINE_GETSCALARARRAYELEMENTS(T_BOOLEAN, jboolean, Boolean, bool
2732 , HOTSPOT_JNI_GETBOOLEANARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy),
2733 HOTSPOT_JNI_GETBOOLEANARRAYELEMENTS_RETURN((uintptr_t*)result))
2734 DEFINE_GETSCALARARRAYELEMENTS(T_BYTE, jbyte, Byte, byte
2735 , HOTSPOT_JNI_GETBYTEARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy),
2736 HOTSPOT_JNI_GETBYTEARRAYELEMENTS_RETURN((char*)result))
2737 DEFINE_GETSCALARARRAYELEMENTS(T_SHORT, jshort, Short, short
2738 , HOTSPOT_JNI_GETSHORTARRAYELEMENTS_ENTRY(env, (uint16_t*) array, (uintptr_t *) isCopy),
2739 HOTSPOT_JNI_GETSHORTARRAYELEMENTS_RETURN((uint16_t*)result))
2740 DEFINE_GETSCALARARRAYELEMENTS(T_CHAR, jchar, Char, char
2741 , HOTSPOT_JNI_GETCHARARRAYELEMENTS_ENTRY(env, (uint16_t*) array, (uintptr_t *) isCopy),
2742 HOTSPOT_JNI_GETCHARARRAYELEMENTS_RETURN(result))
2743 DEFINE_GETSCALARARRAYELEMENTS(T_INT, jint, Int, int
2744 , HOTSPOT_JNI_GETINTARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy),
2745 HOTSPOT_JNI_GETINTARRAYELEMENTS_RETURN((uint32_t*)result))
2746 DEFINE_GETSCALARARRAYELEMENTS(T_LONG, jlong, Long, long
2747 , HOTSPOT_JNI_GETLONGARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy),
2748 HOTSPOT_JNI_GETLONGARRAYELEMENTS_RETURN(((uintptr_t*)result)))
2749 // Float and double probes don't return value because dtrace doesn't currently support it
2750 DEFINE_GETSCALARARRAYELEMENTS(T_FLOAT, jfloat, Float, float
2751 , HOTSPOT_JNI_GETFLOATARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy),
2752 HOTSPOT_JNI_GETFLOATARRAYELEMENTS_RETURN(result))
2753 DEFINE_GETSCALARARRAYELEMENTS(T_DOUBLE, jdouble, Double, double
2754 , HOTSPOT_JNI_GETDOUBLEARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy),
2755 HOTSPOT_JNI_GETDOUBLEARRAYELEMENTS_RETURN(result))
2756
2757
2758 #define DEFINE_RELEASESCALARARRAYELEMENTS(ElementTag,ElementType,Result,Tag \
2759 , EntryProbe, ReturnProbe);\
2760 \
2761 JNI_QUICK_ENTRY(void, \
2762 jni_Release##Result##ArrayElements(JNIEnv *env, ElementType##Array array, \
2763 ElementType *buf, jint mode)) \
2764 JNIWrapper("Release" XSTR(Result) "ArrayElements"); \
2765 EntryProbe; \
2766 typeArrayOop a = typeArrayOop(JNIHandles::resolve_non_null(array)); \
2767 int len = a->length(); \
2768 if (len != 0) { /* Empty array: nothing to free or copy. */ \
2769 if ((mode == 0) || (mode == JNI_COMMIT)) { \
2770 memcpy(a->Tag##_at_addr(0), buf, sizeof(ElementType)*len); \
2771 } \
2772 if ((mode == 0) || (mode == JNI_ABORT)) { \
2773 FreeHeap(buf); \
2774 } \
2775 } \
2776 ReturnProbe; \
2777 JNI_END
2778
2779 DEFINE_RELEASESCALARARRAYELEMENTS(T_BOOLEAN, jboolean, Boolean, bool
2780 , HOTSPOT_JNI_RELEASEBOOLEANARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) buf, mode),
2781 HOTSPOT_JNI_RELEASEBOOLEANARRAYELEMENTS_RETURN())
2782 DEFINE_RELEASESCALARARRAYELEMENTS(T_BYTE, jbyte, Byte, byte
2783 , HOTSPOT_JNI_RELEASEBYTEARRAYELEMENTS_ENTRY(env, array, (char *) buf, mode),
2784 HOTSPOT_JNI_RELEASEBYTEARRAYELEMENTS_RETURN())
2785 DEFINE_RELEASESCALARARRAYELEMENTS(T_SHORT, jshort, Short, short
2786 , HOTSPOT_JNI_RELEASESHORTARRAYELEMENTS_ENTRY(env, array, (uint16_t *) buf, mode),
2787 HOTSPOT_JNI_RELEASESHORTARRAYELEMENTS_RETURN())
2788 DEFINE_RELEASESCALARARRAYELEMENTS(T_CHAR, jchar, Char, char
2789 , HOTSPOT_JNI_RELEASECHARARRAYELEMENTS_ENTRY(env, array, (uint16_t *) buf, mode),
2790 HOTSPOT_JNI_RELEASECHARARRAYELEMENTS_RETURN())
2791 DEFINE_RELEASESCALARARRAYELEMENTS(T_INT, jint, Int, int
2792 , HOTSPOT_JNI_RELEASEINTARRAYELEMENTS_ENTRY(env, array, (uint32_t *) buf, mode),
2793 HOTSPOT_JNI_RELEASEINTARRAYELEMENTS_RETURN())
2794 DEFINE_RELEASESCALARARRAYELEMENTS(T_LONG, jlong, Long, long
2795 , HOTSPOT_JNI_RELEASELONGARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) buf, mode),
2796 HOTSPOT_JNI_RELEASELONGARRAYELEMENTS_RETURN())
2797 DEFINE_RELEASESCALARARRAYELEMENTS(T_FLOAT, jfloat, Float, float
2798 , HOTSPOT_JNI_RELEASEFLOATARRAYELEMENTS_ENTRY(env, array, (float *) buf, mode),
2799 HOTSPOT_JNI_RELEASEFLOATARRAYELEMENTS_RETURN())
2800 DEFINE_RELEASESCALARARRAYELEMENTS(T_DOUBLE, jdouble, Double, double
2801 , HOTSPOT_JNI_RELEASEDOUBLEARRAYELEMENTS_ENTRY(env, array, (double *) buf, mode),
2802 HOTSPOT_JNI_RELEASEDOUBLEARRAYELEMENTS_RETURN())
2803
2804
2805 #define DEFINE_GETSCALARARRAYREGION(ElementTag,ElementType,Result, Tag \
2806 , EntryProbe, ReturnProbe); \
2807 DT_VOID_RETURN_MARK_DECL(Get##Result##ArrayRegion \
2808 , ReturnProbe); \
2809 \
2810 JNI_ENTRY(void, \
2811 jni_Get##Result##ArrayRegion(JNIEnv *env, ElementType##Array array, jsize start, \
2812 jsize len, ElementType *buf)) \
2813 JNIWrapper("Get" XSTR(Result) "ArrayRegion"); \
2814 EntryProbe; \
2815 DT_VOID_RETURN_MARK(Get##Result##ArrayRegion); \
2816 typeArrayOop src = typeArrayOop(JNIHandles::resolve_non_null(array)); \
2817 if (start < 0 || len < 0 || ((unsigned int)start + (unsigned int)len > (unsigned int)src->length())) { \
2818 THROW(vmSymbols::java_lang_ArrayIndexOutOfBoundsException()); \
2819 } else { \
2820 if (len > 0) { \
2821 int sc = TypeArrayKlass::cast(src->klass())->log2_element_size(); \
2822 memcpy((u_char*) buf, \
2823 (u_char*) src->Tag##_at_addr(start), \
2824 len << sc); \
2825 } \
2826 } \
2827 JNI_END
2828
2829 DEFINE_GETSCALARARRAYREGION(T_BOOLEAN, jboolean,Boolean, bool
2830 , HOTSPOT_JNI_GETBOOLEANARRAYREGION_ENTRY(env, array, start, len, (uintptr_t *) buf),
2831 HOTSPOT_JNI_GETBOOLEANARRAYREGION_RETURN());
2832 DEFINE_GETSCALARARRAYREGION(T_BYTE, jbyte, Byte, byte
2833 , HOTSPOT_JNI_GETBYTEARRAYREGION_ENTRY(env, array, start, len, (char *) buf),
2834 HOTSPOT_JNI_GETBYTEARRAYREGION_RETURN());
2835 DEFINE_GETSCALARARRAYREGION(T_SHORT, jshort, Short, short
2836 , HOTSPOT_JNI_GETSHORTARRAYREGION_ENTRY(env, array, start, len, (uint16_t *) buf),
2837 HOTSPOT_JNI_GETSHORTARRAYREGION_RETURN());
2838 DEFINE_GETSCALARARRAYREGION(T_CHAR, jchar, Char, char
2839 , HOTSPOT_JNI_GETCHARARRAYREGION_ENTRY(env, array, start, len, (uint16_t*) buf),
2840 HOTSPOT_JNI_GETCHARARRAYREGION_RETURN());
2841 DEFINE_GETSCALARARRAYREGION(T_INT, jint, Int, int
2842 , HOTSPOT_JNI_GETINTARRAYREGION_ENTRY(env, array, start, len, (uint32_t*) buf),
2843 HOTSPOT_JNI_GETINTARRAYREGION_RETURN());
2844 DEFINE_GETSCALARARRAYREGION(T_LONG, jlong, Long, long
2845 , HOTSPOT_JNI_GETLONGARRAYREGION_ENTRY(env, array, start, len, (uintptr_t *) buf),
2846 HOTSPOT_JNI_GETLONGARRAYREGION_RETURN());
2847 DEFINE_GETSCALARARRAYREGION(T_FLOAT, jfloat, Float, float
2848 , HOTSPOT_JNI_GETFLOATARRAYREGION_ENTRY(env, array, start, len, (float *) buf),
2849 HOTSPOT_JNI_GETFLOATARRAYREGION_RETURN());
2850 DEFINE_GETSCALARARRAYREGION(T_DOUBLE, jdouble, Double, double
2851 , HOTSPOT_JNI_GETDOUBLEARRAYREGION_ENTRY(env, array, start, len, (double *) buf),
2852 HOTSPOT_JNI_GETDOUBLEARRAYREGION_RETURN());
2853
2854
2855 #define DEFINE_SETSCALARARRAYREGION(ElementTag,ElementType,Result, Tag \
2856 , EntryProbe, ReturnProbe); \
2857 DT_VOID_RETURN_MARK_DECL(Set##Result##ArrayRegion \
2858 ,ReturnProbe); \
2859 \
2860 JNI_ENTRY(void, \
2861 jni_Set##Result##ArrayRegion(JNIEnv *env, ElementType##Array array, jsize start, \
2862 jsize len, const ElementType *buf)) \
2863 JNIWrapper("Set" XSTR(Result) "ArrayRegion"); \
2864 EntryProbe; \
2865 DT_VOID_RETURN_MARK(Set##Result##ArrayRegion); \
2866 typeArrayOop dst = typeArrayOop(JNIHandles::resolve_non_null(array)); \
2867 if (start < 0 || len < 0 || ((unsigned int)start + (unsigned int)len > (unsigned int)dst->length())) { \
2868 THROW(vmSymbols::java_lang_ArrayIndexOutOfBoundsException()); \
2869 } else { \
2870 if (len > 0) { \
2871 int sc = TypeArrayKlass::cast(dst->klass())->log2_element_size(); \
2872 memcpy((u_char*) dst->Tag##_at_addr(start), \
2873 (u_char*) buf, \
2874 len << sc); \
2875 } \
2876 } \
2877 JNI_END
2878
2879 DEFINE_SETSCALARARRAYREGION(T_BOOLEAN, jboolean, Boolean, bool
2880 , HOTSPOT_JNI_SETBOOLEANARRAYREGION_ENTRY(env, array, start, len, (uintptr_t *)buf),
2881 HOTSPOT_JNI_SETBOOLEANARRAYREGION_RETURN())
2882 DEFINE_SETSCALARARRAYREGION(T_BYTE, jbyte, Byte, byte
2883 , HOTSPOT_JNI_SETBYTEARRAYREGION_ENTRY(env, array, start, len, (char *) buf),
2884 HOTSPOT_JNI_SETBYTEARRAYREGION_RETURN())
2885 DEFINE_SETSCALARARRAYREGION(T_SHORT, jshort, Short, short
2886 , HOTSPOT_JNI_SETSHORTARRAYREGION_ENTRY(env, array, start, len, (uint16_t *) buf),
2887 HOTSPOT_JNI_SETSHORTARRAYREGION_RETURN())
2888 DEFINE_SETSCALARARRAYREGION(T_CHAR, jchar, Char, char
2889 , HOTSPOT_JNI_SETCHARARRAYREGION_ENTRY(env, array, start, len, (uint16_t *) buf),
2890 HOTSPOT_JNI_SETCHARARRAYREGION_RETURN())
2891 DEFINE_SETSCALARARRAYREGION(T_INT, jint, Int, int
2892 , HOTSPOT_JNI_SETINTARRAYREGION_ENTRY(env, array, start, len, (uint32_t *) buf),
2893 HOTSPOT_JNI_SETINTARRAYREGION_RETURN())
2894 DEFINE_SETSCALARARRAYREGION(T_LONG, jlong, Long, long
2895 , HOTSPOT_JNI_SETLONGARRAYREGION_ENTRY(env, array, start, len, (uintptr_t *) buf),
2896 HOTSPOT_JNI_SETLONGARRAYREGION_RETURN())
2897 DEFINE_SETSCALARARRAYREGION(T_FLOAT, jfloat, Float, float
2898 , HOTSPOT_JNI_SETFLOATARRAYREGION_ENTRY(env, array, start, len, (float *) buf),
2899 HOTSPOT_JNI_SETFLOATARRAYREGION_RETURN())
2900 DEFINE_SETSCALARARRAYREGION(T_DOUBLE, jdouble, Double, double
2901 , HOTSPOT_JNI_SETDOUBLEARRAYREGION_ENTRY(env, array, start, len, (double *) buf),
2902 HOTSPOT_JNI_SETDOUBLEARRAYREGION_RETURN())
2903
2904
2905 //
2906 // Interception of natives
2907 //
2908
2909 // The RegisterNatives call being attempted tried to register with a method that
2910 // is not native. Ask JVM TI what prefixes have been specified. Then check
2911 // to see if the native method is now wrapped with the prefixes. See the
2912 // SetNativeMethodPrefix(es) functions in the JVM TI Spec for details.
2913 static Method* find_prefixed_native(KlassHandle k,
2914 Symbol* name, Symbol* signature, TRAPS) {
2915 #if INCLUDE_JVMTI
2916 ResourceMark rm(THREAD);
2917 Method* method;
2918 int name_len = name->utf8_length();
2919 char* name_str = name->as_utf8();
2920 int prefix_count;
2921 char** prefixes = JvmtiExport::get_all_native_method_prefixes(&prefix_count);
2922 for (int i = 0; i < prefix_count; i++) {
2923 char* prefix = prefixes[i];
2924 int prefix_len = (int)strlen(prefix);
2925
2926 // try adding this prefix to the method name and see if it matches another method name
2927 int trial_len = name_len + prefix_len;
2928 char* trial_name_str = NEW_RESOURCE_ARRAY(char, trial_len + 1);
2929 strcpy(trial_name_str, prefix);
2930 strcat(trial_name_str, name_str);
2931 TempNewSymbol trial_name = SymbolTable::probe(trial_name_str, trial_len);
2932 if (trial_name == NULL) {
2933 continue; // no such symbol, so this prefix wasn't used, try the next prefix
2934 }
2935 method = k()->lookup_method(trial_name, signature);
2936 if (method == NULL) {
2937 continue; // signature doesn't match, try the next prefix
2938 }
2939 if (method->is_native()) {
2940 method->set_is_prefixed_native();
2941 return method; // wahoo, we found a prefixed version of the method, return it
2942 }
2943 // found as non-native, so prefix is good, add it, probably just need more prefixes
2944 name_len = trial_len;
2945 name_str = trial_name_str;
2946 }
2947 #endif // INCLUDE_JVMTI
2948 return NULL; // not found
2949 }
2950
2951 static bool register_native(KlassHandle k, Symbol* name, Symbol* signature, address entry, TRAPS) {
2952 Method* method = k()->lookup_method(name, signature);
2953 if (method == NULL) {
2954 ResourceMark rm;
2955 stringStream st;
2956 st.print("Method %s name or signature does not match",
2957 Method::name_and_sig_as_C_string(k(), name, signature));
2958 THROW_MSG_(vmSymbols::java_lang_NoSuchMethodError(), st.as_string(), false);
2959 }
2960 if (!method->is_native()) {
2961 // trying to register to a non-native method, see if a JVM TI agent has added prefix(es)
2962 method = find_prefixed_native(k, name, signature, THREAD);
2963 if (method == NULL) {
2964 ResourceMark rm;
2965 stringStream st;
2966 st.print("Method %s is not declared as native",
2967 Method::name_and_sig_as_C_string(k(), name, signature));
2968 THROW_MSG_(vmSymbols::java_lang_NoSuchMethodError(), st.as_string(), false);
2969 }
2970 }
2971
2972 if (entry != NULL) {
2973 method->set_native_function(entry,
2974 Method::native_bind_event_is_interesting);
2975 } else {
2976 method->clear_native_function();
2977 }
2978 if (PrintJNIResolving) {
2979 ResourceMark rm(THREAD);
2980 tty->print_cr("[Registering JNI native method %s.%s]",
2981 method->method_holder()->external_name(),
2982 method->name()->as_C_string());
2983 }
2984 return true;
2985 }
2986
2987 DT_RETURN_MARK_DECL(RegisterNatives, jint
2988 , HOTSPOT_JNI_REGISTERNATIVES_RETURN(_ret_ref));
2989
2990 JNI_ENTRY(jint, jni_RegisterNatives(JNIEnv *env, jclass clazz,
2991 const JNINativeMethod *methods,
2992 jint nMethods))
2993 JNIWrapper("RegisterNatives");
2994 HOTSPOT_JNI_REGISTERNATIVES_ENTRY(env, clazz, (void *) methods, nMethods);
2995 jint ret = 0;
2996 DT_RETURN_MARK(RegisterNatives, jint, (const jint&)ret);
2997
2998 KlassHandle h_k(thread, java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz)));
2999
3000 for (int index = 0; index < nMethods; index++) {
3001 const char* meth_name = methods[index].name;
3002 const char* meth_sig = methods[index].signature;
3003 int meth_name_len = (int)strlen(meth_name);
3004
3005 // The class should have been loaded (we have an instance of the class
3006 // passed in) so the method and signature should already be in the symbol
3007 // table. If they're not there, the method doesn't exist.
3008 TempNewSymbol name = SymbolTable::probe(meth_name, meth_name_len);
3009 TempNewSymbol signature = SymbolTable::probe(meth_sig, (int)strlen(meth_sig));
3010
3011 if (name == NULL || signature == NULL) {
3012 ResourceMark rm;
3013 stringStream st;
3014 st.print("Method %s.%s%s not found", h_k()->external_name(), meth_name, meth_sig);
3015 // Must return negative value on failure
3016 THROW_MSG_(vmSymbols::java_lang_NoSuchMethodError(), st.as_string(), -1);
3017 }
3018
3019 bool res = register_native(h_k, name, signature,
3020 (address) methods[index].fnPtr, THREAD);
3021 if (!res) {
3022 ret = -1;
3023 break;
3024 }
3025 }
3026 return ret;
3027 JNI_END
3028
3029
3030 JNI_ENTRY(jint, jni_UnregisterNatives(JNIEnv *env, jclass clazz))
3031 JNIWrapper("UnregisterNatives");
3032 HOTSPOT_JNI_UNREGISTERNATIVES_ENTRY(env, clazz);
3033 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz));
3034 //%note jni_2
3035 if (k->is_instance_klass()) {
3036 for (int index = 0; index < InstanceKlass::cast(k)->methods()->length(); index++) {
3037 Method* m = InstanceKlass::cast(k)->methods()->at(index);
3038 if (m->is_native()) {
3039 m->clear_native_function();
3040 m->set_signature_handler(NULL);
3041 }
3042 }
3043 }
3044 HOTSPOT_JNI_UNREGISTERNATIVES_RETURN(0);
3045 return 0;
3046 JNI_END
3047
3048 //
3049 // Monitor functions
3050 //
3051
3052 DT_RETURN_MARK_DECL(MonitorEnter, jint
3053 , HOTSPOT_JNI_MONITORENTER_RETURN(_ret_ref));
3054
3055 JNI_ENTRY(jint, jni_MonitorEnter(JNIEnv *env, jobject jobj))
3056 HOTSPOT_JNI_MONITORENTER_ENTRY(env, jobj);
3057 jint ret = JNI_ERR;
3058 DT_RETURN_MARK(MonitorEnter, jint, (const jint&)ret);
3059
3060 // If the object is null, we can't do anything with it
3061 if (jobj == NULL) {
3062 THROW_(vmSymbols::java_lang_NullPointerException(), JNI_ERR);
3063 }
3064
3065 Handle obj(thread, JNIHandles::resolve_non_null(jobj));
3066 ObjectSynchronizer::jni_enter(obj, CHECK_(JNI_ERR));
3067 ret = JNI_OK;
3068 return ret;
3069 JNI_END
3070
3071 DT_RETURN_MARK_DECL(MonitorExit, jint
3072 , HOTSPOT_JNI_MONITOREXIT_RETURN(_ret_ref));
3073
3074 JNI_ENTRY(jint, jni_MonitorExit(JNIEnv *env, jobject jobj))
3075 HOTSPOT_JNI_MONITOREXIT_ENTRY(env, jobj);
3076 jint ret = JNI_ERR;
3077 DT_RETURN_MARK(MonitorExit, jint, (const jint&)ret);
3078
3079 // Don't do anything with a null object
3080 if (jobj == NULL) {
3081 THROW_(vmSymbols::java_lang_NullPointerException(), JNI_ERR);
3082 }
3083
3084 Handle obj(THREAD, JNIHandles::resolve_non_null(jobj));
3085 ObjectSynchronizer::jni_exit(obj(), CHECK_(JNI_ERR));
3086
3087 ret = JNI_OK;
3088 return ret;
3089 JNI_END
3090
3091 //
3092 // Extensions
3093 //
3094
3095 DT_VOID_RETURN_MARK_DECL(GetStringRegion
3096 , HOTSPOT_JNI_GETSTRINGREGION_RETURN());
3097
3098 JNI_ENTRY(void, jni_GetStringRegion(JNIEnv *env, jstring string, jsize start, jsize len, jchar *buf))
3099 JNIWrapper("GetStringRegion");
3100 HOTSPOT_JNI_GETSTRINGREGION_ENTRY(env, string, start, len, buf);
3101 DT_VOID_RETURN_MARK(GetStringRegion);
3102 oop s = JNIHandles::resolve_non_null(string);
3103 int s_len = java_lang_String::length(s);
3104 if (start < 0 || len < 0 || start + len > s_len) {
3105 THROW(vmSymbols::java_lang_StringIndexOutOfBoundsException());
3106 } else {
3107 if (len > 0) {
3108 typeArrayOop s_value = java_lang_String::value(s);
3109 bool is_latin1 = java_lang_String::is_latin1(s);
3110 if (!is_latin1) {
3111 memcpy(buf, s_value->char_at_addr(start), sizeof(jchar)*len);
3112 } else {
3113 for (int i = 0; i < len; i++) {
3114 buf[i] = ((jchar) s_value->byte_at(i + start)) & 0xff;
3115 }
3116 }
3117 }
3118 }
3119 JNI_END
3120
3121 DT_VOID_RETURN_MARK_DECL(GetStringUTFRegion
3122 , HOTSPOT_JNI_GETSTRINGUTFREGION_RETURN());
3123
3124 JNI_ENTRY(void, jni_GetStringUTFRegion(JNIEnv *env, jstring string, jsize start, jsize len, char *buf))
3125 JNIWrapper("GetStringUTFRegion");
3126 HOTSPOT_JNI_GETSTRINGUTFREGION_ENTRY(env, string, start, len, buf);
3127 DT_VOID_RETURN_MARK(GetStringUTFRegion);
3128 oop s = JNIHandles::resolve_non_null(string);
3129 int s_len = java_lang_String::length(s);
3130 if (start < 0 || len < 0 || start + len > s_len) {
3131 THROW(vmSymbols::java_lang_StringIndexOutOfBoundsException());
3132 } else {
3133 //%note jni_7
3134 if (len > 0) {
3135 // Assume the buffer is large enough as the JNI spec. does not require user error checking
3136 java_lang_String::as_utf8_string(s, start, len, buf, INT_MAX);
3137 // as_utf8_string null-terminates the result string
3138 } else {
3139 // JDK null-terminates the buffer even in len is zero
3140 if (buf != NULL) {
3141 buf[0] = 0;
3142 }
3143 }
3144 }
3145 JNI_END
3146
3147
3148 JNI_ENTRY(void*, jni_GetPrimitiveArrayCritical(JNIEnv *env, jarray array, jboolean *isCopy))
3149 JNIWrapper("GetPrimitiveArrayCritical");
3150 HOTSPOT_JNI_GETPRIMITIVEARRAYCRITICAL_ENTRY(env, array, (uintptr_t *) isCopy);
3151 GCLocker::lock_critical(thread);
3152 if (isCopy != NULL) {
3153 *isCopy = JNI_FALSE;
3154 }
3155 oop a = JNIHandles::resolve_non_null(array);
3156 assert(a->is_array(), "just checking");
3157 BasicType type;
3158 if (a->is_objArray()) {
3159 type = T_OBJECT;
3160 } else {
3161 type = TypeArrayKlass::cast(a->klass())->element_type();
3162 }
3163 void* ret = arrayOop(a)->base(type);
3164 HOTSPOT_JNI_GETPRIMITIVEARRAYCRITICAL_RETURN(ret);
3165 return ret;
3166 JNI_END
3167
3168
3169 JNI_ENTRY(void, jni_ReleasePrimitiveArrayCritical(JNIEnv *env, jarray array, void *carray, jint mode))
3170 JNIWrapper("ReleasePrimitiveArrayCritical");
3171 HOTSPOT_JNI_RELEASEPRIMITIVEARRAYCRITICAL_ENTRY(env, array, carray, mode);
3172 // The array, carray and mode arguments are ignored
3173 GCLocker::unlock_critical(thread);
3174 HOTSPOT_JNI_RELEASEPRIMITIVEARRAYCRITICAL_RETURN();
3175 JNI_END
3176
3177
3178 JNI_ENTRY(const jchar*, jni_GetStringCritical(JNIEnv *env, jstring string, jboolean *isCopy))
3179 JNIWrapper("GetStringCritical");
3180 HOTSPOT_JNI_GETSTRINGCRITICAL_ENTRY(env, string, (uintptr_t *) isCopy);
3181 GCLocker::lock_critical(thread);
3182 oop s = JNIHandles::resolve_non_null(string);
3183 typeArrayOop s_value = java_lang_String::value(s);
3184 bool is_latin1 = java_lang_String::is_latin1(s);
3185 if (isCopy != NULL) {
3186 *isCopy = is_latin1 ? JNI_TRUE : JNI_FALSE;
3187 }
3188 jchar* ret;
3189 if (!is_latin1) {
3190 ret = (jchar*) s_value->base(T_CHAR);
3191 } else {
3192 // Inflate latin1 encoded string to UTF16
3193 int s_len = java_lang_String::length(s);
3194 ret = NEW_C_HEAP_ARRAY_RETURN_NULL(jchar, s_len + 1, mtInternal); // add one for zero termination
3195 /* JNI Specification states return NULL on OOM */
3196 if (ret != NULL) {
3197 for (int i = 0; i < s_len; i++) {
3198 ret[i] = ((jchar) s_value->byte_at(i)) & 0xff;
3199 }
3200 ret[s_len] = 0;
3201 }
3202 }
3203 HOTSPOT_JNI_GETSTRINGCRITICAL_RETURN((uint16_t *) ret);
3204 return ret;
3205 JNI_END
3206
3207
3208 JNI_ENTRY(void, jni_ReleaseStringCritical(JNIEnv *env, jstring str, const jchar *chars))
3209 JNIWrapper("ReleaseStringCritical");
3210 HOTSPOT_JNI_RELEASESTRINGCRITICAL_ENTRY(env, str, (uint16_t *) chars);
3211 // The str and chars arguments are ignored for UTF16 strings
3212 oop s = JNIHandles::resolve_non_null(str);
3213 bool is_latin1 = java_lang_String::is_latin1(s);
3214 if (is_latin1) {
3215 // For latin1 string, free jchar array allocated by earlier call to GetStringCritical.
3216 // This assumes that ReleaseStringCritical bookends GetStringCritical.
3217 FREE_C_HEAP_ARRAY(jchar, chars);
3218 }
3219 GCLocker::unlock_critical(thread);
3220 HOTSPOT_JNI_RELEASESTRINGCRITICAL_RETURN();
3221 JNI_END
3222
3223
3224 JNI_ENTRY(jweak, jni_NewWeakGlobalRef(JNIEnv *env, jobject ref))
3225 JNIWrapper("jni_NewWeakGlobalRef");
3226 HOTSPOT_JNI_NEWWEAKGLOBALREF_ENTRY(env, ref);
3227 Handle ref_handle(thread, JNIHandles::resolve(ref));
3228 jweak ret = JNIHandles::make_weak_global(ref_handle);
3229 HOTSPOT_JNI_NEWWEAKGLOBALREF_RETURN(ret);
3230 return ret;
3231 JNI_END
3232
3233 // Must be JNI_ENTRY (with HandleMark)
3234 JNI_ENTRY(void, jni_DeleteWeakGlobalRef(JNIEnv *env, jweak ref))
3235 JNIWrapper("jni_DeleteWeakGlobalRef");
3236 HOTSPOT_JNI_DELETEWEAKGLOBALREF_ENTRY(env, ref);
3237 JNIHandles::destroy_weak_global(ref);
3238 HOTSPOT_JNI_DELETEWEAKGLOBALREF_RETURN();
3239 JNI_END
3240
3241
3242 JNI_QUICK_ENTRY(jboolean, jni_ExceptionCheck(JNIEnv *env))
3243 JNIWrapper("jni_ExceptionCheck");
3244 HOTSPOT_JNI_EXCEPTIONCHECK_ENTRY(env);
3245 jni_check_async_exceptions(thread);
3246 jboolean ret = (thread->has_pending_exception()) ? JNI_TRUE : JNI_FALSE;
3247 HOTSPOT_JNI_EXCEPTIONCHECK_RETURN(ret);
3248 return ret;
3249 JNI_END
3250
3251
3252 // Initialization state for three routines below relating to
3253 // java.nio.DirectBuffers
3254 static jint directBufferSupportInitializeStarted = 0;
3255 static volatile jint directBufferSupportInitializeEnded = 0;
3256 static volatile jint directBufferSupportInitializeFailed = 0;
3257 static jclass bufferClass = NULL;
3258 static jclass directBufferClass = NULL;
3259 static jclass directByteBufferClass = NULL;
3260 static jmethodID directByteBufferConstructor = NULL;
3261 static jfieldID directBufferAddressField = NULL;
3262 static jfieldID bufferCapacityField = NULL;
3263
3264 static jclass lookupOne(JNIEnv* env, const char* name, TRAPS) {
3265 Handle loader; // null (bootstrap) loader
3266 Handle protection_domain; // null protection domain
3267
3268 TempNewSymbol sym = SymbolTable::new_symbol(name, CHECK_NULL);
3269 jclass result = find_class_from_class_loader(env, sym, true, loader, protection_domain, true, CHECK_NULL);
3270
3271 if (log_is_enabled(Info, classresolve) && result != NULL) {
3272 trace_class_resolution(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(result)));
3273 }
3274 return result;
3275 }
3276
3277 // These lookups are done with the NULL (bootstrap) ClassLoader to
3278 // circumvent any security checks that would be done by jni_FindClass.
3279 JNI_ENTRY(bool, lookupDirectBufferClasses(JNIEnv* env))
3280 {
3281 if ((bufferClass = lookupOne(env, "java/nio/Buffer", thread)) == NULL) { return false; }
3282 if ((directBufferClass = lookupOne(env, "sun/nio/ch/DirectBuffer", thread)) == NULL) { return false; }
3283 if ((directByteBufferClass = lookupOne(env, "java/nio/DirectByteBuffer", thread)) == NULL) { return false; }
3284 return true;
3285 }
3286 JNI_END
3287
3288
3289 static bool initializeDirectBufferSupport(JNIEnv* env, JavaThread* thread) {
3290 if (directBufferSupportInitializeFailed) {
3291 return false;
3292 }
3293
3294 if (Atomic::cmpxchg(1, &directBufferSupportInitializeStarted, 0) == 0) {
3295 if (!lookupDirectBufferClasses(env)) {
3296 directBufferSupportInitializeFailed = 1;
3297 return false;
3298 }
3299
3300 // Make global references for these
3301 bufferClass = (jclass) env->NewGlobalRef(bufferClass);
3302 directBufferClass = (jclass) env->NewGlobalRef(directBufferClass);
3303 directByteBufferClass = (jclass) env->NewGlobalRef(directByteBufferClass);
3304
3305 // Get needed field and method IDs
3306 directByteBufferConstructor = env->GetMethodID(directByteBufferClass, "<init>", "(JI)V");
3307 if (env->ExceptionCheck()) {
3308 env->ExceptionClear();
3309 directBufferSupportInitializeFailed = 1;
3310 return false;
3311 }
3312 directBufferAddressField = env->GetFieldID(bufferClass, "address", "J");
3313 if (env->ExceptionCheck()) {
3314 env->ExceptionClear();
3315 directBufferSupportInitializeFailed = 1;
3316 return false;
3317 }
3318 bufferCapacityField = env->GetFieldID(bufferClass, "capacity", "I");
3319 if (env->ExceptionCheck()) {
3320 env->ExceptionClear();
3321 directBufferSupportInitializeFailed = 1;
3322 return false;
3323 }
3324
3325 if ((directByteBufferConstructor == NULL) ||
3326 (directBufferAddressField == NULL) ||
3327 (bufferCapacityField == NULL)) {
3328 directBufferSupportInitializeFailed = 1;
3329 return false;
3330 }
3331
3332 directBufferSupportInitializeEnded = 1;
3333 } else {
3334 while (!directBufferSupportInitializeEnded && !directBufferSupportInitializeFailed) {
3335 os::naked_yield();
3336 }
3337 }
3338
3339 return !directBufferSupportInitializeFailed;
3340 }
3341
3342 extern "C" jobject JNICALL jni_NewDirectByteBuffer(JNIEnv *env, void* address, jlong capacity)
3343 {
3344 // thread_from_jni_environment() will block if VM is gone.
3345 JavaThread* thread = JavaThread::thread_from_jni_environment(env);
3346
3347 JNIWrapper("jni_NewDirectByteBuffer");
3348 HOTSPOT_JNI_NEWDIRECTBYTEBUFFER_ENTRY(env, address, capacity);
3349
3350 if (!directBufferSupportInitializeEnded) {
3351 if (!initializeDirectBufferSupport(env, thread)) {
3352 HOTSPOT_JNI_NEWDIRECTBYTEBUFFER_RETURN(NULL);
3353 return NULL;
3354 }
3355 }
3356
3357 // Being paranoid about accidental sign extension on address
3358 jlong addr = (jlong) ((uintptr_t) address);
3359 // NOTE that package-private DirectByteBuffer constructor currently
3360 // takes int capacity
3361 jint cap = (jint) capacity;
3362 jobject ret = env->NewObject(directByteBufferClass, directByteBufferConstructor, addr, cap);
3363 HOTSPOT_JNI_NEWDIRECTBYTEBUFFER_RETURN(ret);
3364 return ret;
3365 }
3366
3367 DT_RETURN_MARK_DECL(GetDirectBufferAddress, void*
3368 , HOTSPOT_JNI_GETDIRECTBUFFERADDRESS_RETURN((void*) _ret_ref));
3369
3370 extern "C" void* JNICALL jni_GetDirectBufferAddress(JNIEnv *env, jobject buf)
3371 {
3372 // thread_from_jni_environment() will block if VM is gone.
3373 JavaThread* thread = JavaThread::thread_from_jni_environment(env);
3374
3375 JNIWrapper("jni_GetDirectBufferAddress");
3376 HOTSPOT_JNI_GETDIRECTBUFFERADDRESS_ENTRY(env, buf);
3377 void* ret = NULL;
3378 DT_RETURN_MARK(GetDirectBufferAddress, void*, (const void*&)ret);
3379
3380 if (!directBufferSupportInitializeEnded) {
3381 if (!initializeDirectBufferSupport(env, thread)) {
3382 return 0;
3383 }
3384 }
3385
3386 if ((buf != NULL) && (!env->IsInstanceOf(buf, directBufferClass))) {
3387 return 0;
3388 }
3389
3390 ret = (void*)(intptr_t)env->GetLongField(buf, directBufferAddressField);
3391 return ret;
3392 }
3393
3394 DT_RETURN_MARK_DECL(GetDirectBufferCapacity, jlong
3395 , HOTSPOT_JNI_GETDIRECTBUFFERCAPACITY_RETURN(_ret_ref));
3396
3397 extern "C" jlong JNICALL jni_GetDirectBufferCapacity(JNIEnv *env, jobject buf)
3398 {
3399 // thread_from_jni_environment() will block if VM is gone.
3400 JavaThread* thread = JavaThread::thread_from_jni_environment(env);
3401
3402 JNIWrapper("jni_GetDirectBufferCapacity");
3403 HOTSPOT_JNI_GETDIRECTBUFFERCAPACITY_ENTRY(env, buf);
3404 jlong ret = -1;
3405 DT_RETURN_MARK(GetDirectBufferCapacity, jlong, (const jlong&)ret);
3406
3407 if (!directBufferSupportInitializeEnded) {
3408 if (!initializeDirectBufferSupport(env, thread)) {
3409 ret = 0;
3410 return ret;
3411 }
3412 }
3413
3414 if (buf == NULL) {
3415 return -1;
3416 }
3417
3418 if (!env->IsInstanceOf(buf, directBufferClass)) {
3419 return -1;
3420 }
3421
3422 // NOTE that capacity is currently an int in the implementation
3423 ret = env->GetIntField(buf, bufferCapacityField);
3424 return ret;
3425 }
3426
3427
3428 JNI_LEAF(jint, jni_GetVersion(JNIEnv *env))
3429 JNIWrapper("GetVersion");
3430 HOTSPOT_JNI_GETVERSION_ENTRY(env);
3431 HOTSPOT_JNI_GETVERSION_RETURN(CurrentVersion);
3432 return CurrentVersion;
3433 JNI_END
3434
3435 extern struct JavaVM_ main_vm;
3436
3437 JNI_LEAF(jint, jni_GetJavaVM(JNIEnv *env, JavaVM **vm))
3438 JNIWrapper("jni_GetJavaVM");
3439 HOTSPOT_JNI_GETJAVAVM_ENTRY(env, (void **) vm);
3440 *vm = (JavaVM *)(&main_vm);
3441 HOTSPOT_JNI_GETJAVAVM_RETURN(JNI_OK);
3442 return JNI_OK;
3443 JNI_END
3444
3445 // Structure containing all jni functions
3446 struct JNINativeInterface_ jni_NativeInterface = {
3447 NULL,
3448 NULL,
3449 NULL,
3450
3451 NULL,
3452
3453 jni_GetVersion,
3454
3455 jni_DefineClass,
3456 jni_FindClass,
3457
3458 jni_FromReflectedMethod,
3459 jni_FromReflectedField,
3460
3461 jni_ToReflectedMethod,
3462
3463 jni_GetSuperclass,
3464 jni_IsAssignableFrom,
3465
3466 jni_ToReflectedField,
3467
3468 jni_Throw,
3469 jni_ThrowNew,
3470 jni_ExceptionOccurred,
3471 jni_ExceptionDescribe,
3472 jni_ExceptionClear,
3473 jni_FatalError,
3474
3475 jni_PushLocalFrame,
3476 jni_PopLocalFrame,
3477
3478 jni_NewGlobalRef,
3479 jni_DeleteGlobalRef,
3480 jni_DeleteLocalRef,
3481 jni_IsSameObject,
3482
3483 jni_NewLocalRef,
3484 jni_EnsureLocalCapacity,
3485
3486 jni_AllocObject,
3487 jni_NewObject,
3488 jni_NewObjectV,
3489 jni_NewObjectA,
3490
3491 jni_GetObjectClass,
3492 jni_IsInstanceOf,
3493
3494 jni_GetMethodID,
3495
3496 jni_CallObjectMethod,
3497 jni_CallObjectMethodV,
3498 jni_CallObjectMethodA,
3499 jni_CallBooleanMethod,
3500 jni_CallBooleanMethodV,
3501 jni_CallBooleanMethodA,
3502 jni_CallByteMethod,
3503 jni_CallByteMethodV,
3504 jni_CallByteMethodA,
3505 jni_CallCharMethod,
3506 jni_CallCharMethodV,
3507 jni_CallCharMethodA,
3508 jni_CallShortMethod,
3509 jni_CallShortMethodV,
3510 jni_CallShortMethodA,
3511 jni_CallIntMethod,
3512 jni_CallIntMethodV,
3513 jni_CallIntMethodA,
3514 jni_CallLongMethod,
3515 jni_CallLongMethodV,
3516 jni_CallLongMethodA,
3517 jni_CallFloatMethod,
3518 jni_CallFloatMethodV,
3519 jni_CallFloatMethodA,
3520 jni_CallDoubleMethod,
3521 jni_CallDoubleMethodV,
3522 jni_CallDoubleMethodA,
3523 jni_CallVoidMethod,
3524 jni_CallVoidMethodV,
3525 jni_CallVoidMethodA,
3526
3527 jni_CallNonvirtualObjectMethod,
3528 jni_CallNonvirtualObjectMethodV,
3529 jni_CallNonvirtualObjectMethodA,
3530 jni_CallNonvirtualBooleanMethod,
3531 jni_CallNonvirtualBooleanMethodV,
3532 jni_CallNonvirtualBooleanMethodA,
3533 jni_CallNonvirtualByteMethod,
3534 jni_CallNonvirtualByteMethodV,
3535 jni_CallNonvirtualByteMethodA,
3536 jni_CallNonvirtualCharMethod,
3537 jni_CallNonvirtualCharMethodV,
3538 jni_CallNonvirtualCharMethodA,
3539 jni_CallNonvirtualShortMethod,
3540 jni_CallNonvirtualShortMethodV,
3541 jni_CallNonvirtualShortMethodA,
3542 jni_CallNonvirtualIntMethod,
3543 jni_CallNonvirtualIntMethodV,
3544 jni_CallNonvirtualIntMethodA,
3545 jni_CallNonvirtualLongMethod,
3546 jni_CallNonvirtualLongMethodV,
3547 jni_CallNonvirtualLongMethodA,
3548 jni_CallNonvirtualFloatMethod,
3549 jni_CallNonvirtualFloatMethodV,
3550 jni_CallNonvirtualFloatMethodA,
3551 jni_CallNonvirtualDoubleMethod,
3552 jni_CallNonvirtualDoubleMethodV,
3553 jni_CallNonvirtualDoubleMethodA,
3554 jni_CallNonvirtualVoidMethod,
3555 jni_CallNonvirtualVoidMethodV,
3556 jni_CallNonvirtualVoidMethodA,
3557
3558 jni_GetFieldID,
3559
3560 jni_GetObjectField,
3561 jni_GetBooleanField,
3562 jni_GetByteField,
3563 jni_GetCharField,
3564 jni_GetShortField,
3565 jni_GetIntField,
3566 jni_GetLongField,
3567 jni_GetFloatField,
3568 jni_GetDoubleField,
3569
3570 jni_SetObjectField,
3571 jni_SetBooleanField,
3572 jni_SetByteField,
3573 jni_SetCharField,
3574 jni_SetShortField,
3575 jni_SetIntField,
3576 jni_SetLongField,
3577 jni_SetFloatField,
3578 jni_SetDoubleField,
3579
3580 jni_GetStaticMethodID,
3581
3582 jni_CallStaticObjectMethod,
3583 jni_CallStaticObjectMethodV,
3584 jni_CallStaticObjectMethodA,
3585 jni_CallStaticBooleanMethod,
3586 jni_CallStaticBooleanMethodV,
3587 jni_CallStaticBooleanMethodA,
3588 jni_CallStaticByteMethod,
3589 jni_CallStaticByteMethodV,
3590 jni_CallStaticByteMethodA,
3591 jni_CallStaticCharMethod,
3592 jni_CallStaticCharMethodV,
3593 jni_CallStaticCharMethodA,
3594 jni_CallStaticShortMethod,
3595 jni_CallStaticShortMethodV,
3596 jni_CallStaticShortMethodA,
3597 jni_CallStaticIntMethod,
3598 jni_CallStaticIntMethodV,
3599 jni_CallStaticIntMethodA,
3600 jni_CallStaticLongMethod,
3601 jni_CallStaticLongMethodV,
3602 jni_CallStaticLongMethodA,
3603 jni_CallStaticFloatMethod,
3604 jni_CallStaticFloatMethodV,
3605 jni_CallStaticFloatMethodA,
3606 jni_CallStaticDoubleMethod,
3607 jni_CallStaticDoubleMethodV,
3608 jni_CallStaticDoubleMethodA,
3609 jni_CallStaticVoidMethod,
3610 jni_CallStaticVoidMethodV,
3611 jni_CallStaticVoidMethodA,
3612
3613 jni_GetStaticFieldID,
3614
3615 jni_GetStaticObjectField,
3616 jni_GetStaticBooleanField,
3617 jni_GetStaticByteField,
3618 jni_GetStaticCharField,
3619 jni_GetStaticShortField,
3620 jni_GetStaticIntField,
3621 jni_GetStaticLongField,
3622 jni_GetStaticFloatField,
3623 jni_GetStaticDoubleField,
3624
3625 jni_SetStaticObjectField,
3626 jni_SetStaticBooleanField,
3627 jni_SetStaticByteField,
3628 jni_SetStaticCharField,
3629 jni_SetStaticShortField,
3630 jni_SetStaticIntField,
3631 jni_SetStaticLongField,
3632 jni_SetStaticFloatField,
3633 jni_SetStaticDoubleField,
3634
3635 jni_NewString,
3636 jni_GetStringLength,
3637 jni_GetStringChars,
3638 jni_ReleaseStringChars,
3639
3640 jni_NewStringUTF,
3641 jni_GetStringUTFLength,
3642 jni_GetStringUTFChars,
3643 jni_ReleaseStringUTFChars,
3644
3645 jni_GetArrayLength,
3646
3647 jni_NewObjectArray,
3648 jni_GetObjectArrayElement,
3649 jni_SetObjectArrayElement,
3650
3651 jni_NewBooleanArray,
3652 jni_NewByteArray,
3653 jni_NewCharArray,
3654 jni_NewShortArray,
3655 jni_NewIntArray,
3656 jni_NewLongArray,
3657 jni_NewFloatArray,
3658 jni_NewDoubleArray,
3659
3660 jni_GetBooleanArrayElements,
3661 jni_GetByteArrayElements,
3662 jni_GetCharArrayElements,
3663 jni_GetShortArrayElements,
3664 jni_GetIntArrayElements,
3665 jni_GetLongArrayElements,
3666 jni_GetFloatArrayElements,
3667 jni_GetDoubleArrayElements,
3668
3669 jni_ReleaseBooleanArrayElements,
3670 jni_ReleaseByteArrayElements,
3671 jni_ReleaseCharArrayElements,
3672 jni_ReleaseShortArrayElements,
3673 jni_ReleaseIntArrayElements,
3674 jni_ReleaseLongArrayElements,
3675 jni_ReleaseFloatArrayElements,
3676 jni_ReleaseDoubleArrayElements,
3677
3678 jni_GetBooleanArrayRegion,
3679 jni_GetByteArrayRegion,
3680 jni_GetCharArrayRegion,
3681 jni_GetShortArrayRegion,
3682 jni_GetIntArrayRegion,
3683 jni_GetLongArrayRegion,
3684 jni_GetFloatArrayRegion,
3685 jni_GetDoubleArrayRegion,
3686
3687 jni_SetBooleanArrayRegion,
3688 jni_SetByteArrayRegion,
3689 jni_SetCharArrayRegion,
3690 jni_SetShortArrayRegion,
3691 jni_SetIntArrayRegion,
3692 jni_SetLongArrayRegion,
3693 jni_SetFloatArrayRegion,
3694 jni_SetDoubleArrayRegion,
3695
3696 jni_RegisterNatives,
3697 jni_UnregisterNatives,
3698
3699 jni_MonitorEnter,
3700 jni_MonitorExit,
3701
3702 jni_GetJavaVM,
3703
3704 jni_GetStringRegion,
3705 jni_GetStringUTFRegion,
3706
3707 jni_GetPrimitiveArrayCritical,
3708 jni_ReleasePrimitiveArrayCritical,
3709
3710 jni_GetStringCritical,
3711 jni_ReleaseStringCritical,
3712
3713 jni_NewWeakGlobalRef,
3714 jni_DeleteWeakGlobalRef,
3715
3716 jni_ExceptionCheck,
3717
3718 jni_NewDirectByteBuffer,
3719 jni_GetDirectBufferAddress,
3720 jni_GetDirectBufferCapacity,
3721
3722 // New 1_6 features
3723
3724 jni_GetObjectRefType
3725 };
3726
3727
3728 // For jvmti use to modify jni function table.
3729 // Java threads in native contiues to run until it is transitioned
3730 // to VM at safepoint. Before the transition or before it is blocked
3731 // for safepoint it may access jni function table. VM could crash if
3732 // any java thread access the jni function table in the middle of memcpy.
3733 // To avoid this each function pointers are copied automically.
3734 void copy_jni_function_table(const struct JNINativeInterface_ *new_jni_NativeInterface) {
3735 assert(SafepointSynchronize::is_at_safepoint(), "must be at safepoint");
3736 intptr_t *a = (intptr_t *) jni_functions();
3737 intptr_t *b = (intptr_t *) new_jni_NativeInterface;
3738 for (uint i=0; i < sizeof(struct JNINativeInterface_)/sizeof(void *); i++) {
3739 Atomic::store_ptr(*b++, a++);
3740 }
3741 }
3742
3743 void quicken_jni_functions() {
3744 // Replace Get<Primitive>Field with fast versions
3745 if (UseFastJNIAccessors && !JvmtiExport::can_post_field_access()
3746 && !VerifyJNIFields && !CountJNICalls && !CheckJNICalls
3747 #if defined(_WINDOWS) && defined(IA32) && defined(COMPILER2)
3748 // windows x86 currently needs SEH wrapper and the gain of the fast
3749 // versions currently isn't certain for server vm on uniprocessor.
3750 && os::is_MP()
3751 #endif
3752 ) {
3753 address func;
3754 func = JNI_FastGetField::generate_fast_get_boolean_field();
3755 if (func != (address)-1) {
3756 jni_NativeInterface.GetBooleanField = (GetBooleanField_t)func;
3757 }
3758 func = JNI_FastGetField::generate_fast_get_byte_field();
3759 if (func != (address)-1) {
3760 jni_NativeInterface.GetByteField = (GetByteField_t)func;
3761 }
3762 func = JNI_FastGetField::generate_fast_get_char_field();
3763 if (func != (address)-1) {
3764 jni_NativeInterface.GetCharField = (GetCharField_t)func;
3765 }
3766 func = JNI_FastGetField::generate_fast_get_short_field();
3767 if (func != (address)-1) {
3768 jni_NativeInterface.GetShortField = (GetShortField_t)func;
3769 }
3770 func = JNI_FastGetField::generate_fast_get_int_field();
3771 if (func != (address)-1) {
3772 jni_NativeInterface.GetIntField = (GetIntField_t)func;
3773 }
3774 func = JNI_FastGetField::generate_fast_get_long_field();
3775 if (func != (address)-1) {
3776 jni_NativeInterface.GetLongField = (GetLongField_t)func;
3777 }
3778 func = JNI_FastGetField::generate_fast_get_float_field();
3779 if (func != (address)-1) {
3780 jni_NativeInterface.GetFloatField = (GetFloatField_t)func;
3781 }
3782 func = JNI_FastGetField::generate_fast_get_double_field();
3783 if (func != (address)-1) {
3784 jni_NativeInterface.GetDoubleField = (GetDoubleField_t)func;
3785 }
3786 }
3787 }
3788
3789 // Returns the function structure
3790 struct JNINativeInterface_* jni_functions() {
3791 #if INCLUDE_JNI_CHECK
3792 if (CheckJNICalls) return jni_functions_check();
3793 #endif // INCLUDE_JNI_CHECK
3794 return &jni_NativeInterface;
3795 }
3796
3797 // Returns the function structure
3798 struct JNINativeInterface_* jni_functions_nocheck() {
3799 return &jni_NativeInterface;
3800 }
3801
3802
3803 // Invocation API
3804
3805
3806 // Forward declaration
3807 extern const struct JNIInvokeInterface_ jni_InvokeInterface;
3808
3809 // Global invocation API vars
3810 volatile jint vm_created = 0;
3811 // Indicate whether it is safe to recreate VM
3812 volatile jint safe_to_recreate_vm = 1;
3813 struct JavaVM_ main_vm = {&jni_InvokeInterface};
3814
3815
3816 #define JAVASTACKSIZE (400 * 1024) /* Default size of a thread java stack */
3817 enum { VERIFY_NONE, VERIFY_REMOTE, VERIFY_ALL };
3818
3819 DT_RETURN_MARK_DECL(GetDefaultJavaVMInitArgs, jint
3820 , HOTSPOT_JNI_GETDEFAULTJAVAVMINITARGS_RETURN(_ret_ref));
3821
3822 _JNI_IMPORT_OR_EXPORT_ jint JNICALL JNI_GetDefaultJavaVMInitArgs(void *args_) {
3823 HOTSPOT_JNI_GETDEFAULTJAVAVMINITARGS_ENTRY(args_);
3824 JDK1_1InitArgs *args = (JDK1_1InitArgs *)args_;
3825 jint ret = JNI_ERR;
3826 DT_RETURN_MARK(GetDefaultJavaVMInitArgs, jint, (const jint&)ret);
3827
3828 if (Threads::is_supported_jni_version(args->version)) {
3829 ret = JNI_OK;
3830 }
3831 // 1.1 style no longer supported in hotspot.
3832 // According the JNI spec, we should update args->version on return.
3833 // We also use the structure to communicate with launcher about default
3834 // stack size.
3835 if (args->version == JNI_VERSION_1_1) {
3836 args->version = JNI_VERSION_1_2;
3837 // javaStackSize is int in arguments structure
3838 assert(jlong(ThreadStackSize) * K < INT_MAX, "integer overflow");
3839 args->javaStackSize = (jint)(ThreadStackSize * K);
3840 }
3841 return ret;
3842 }
3843
3844 DT_RETURN_MARK_DECL(CreateJavaVM, jint
3845 , HOTSPOT_JNI_CREATEJAVAVM_RETURN(_ret_ref));
3846
3847 static jint JNI_CreateJavaVM_inner(JavaVM **vm, void **penv, void *args) {
3848 HOTSPOT_JNI_CREATEJAVAVM_ENTRY((void **) vm, penv, args);
3849
3850 jint result = JNI_ERR;
3851 DT_RETURN_MARK(CreateJavaVM, jint, (const jint&)result);
3852
3853 // We're about to use Atomic::xchg for synchronization. Some Zero
3854 // platforms use the GCC builtin __sync_lock_test_and_set for this,
3855 // but __sync_lock_test_and_set is not guaranteed to do what we want
3856 // on all architectures. So we check it works before relying on it.
3857 #if defined(ZERO) && defined(ASSERT)
3858 {
3859 jint a = 0xcafebabe;
3860 jint b = Atomic::xchg(0xdeadbeef, &a);
3861 void *c = &a;
3862 void *d = Atomic::xchg_ptr(&b, &c);
3863 assert(a == (jint) 0xdeadbeef && b == (jint) 0xcafebabe, "Atomic::xchg() works");
3864 assert(c == &b && d == &a, "Atomic::xchg_ptr() works");
3865 }
3866 #endif // ZERO && ASSERT
3867
3868 // At the moment it's only possible to have one Java VM,
3869 // since some of the runtime state is in global variables.
3870
3871 // We cannot use our mutex locks here, since they only work on
3872 // Threads. We do an atomic compare and exchange to ensure only
3873 // one thread can call this method at a time
3874
3875 // We use Atomic::xchg rather than Atomic::add/dec since on some platforms
3876 // the add/dec implementations are dependent on whether we are running
3877 // on a multiprocessor, and at this stage of initialization the os::is_MP
3878 // function used to determine this will always return false. Atomic::xchg
3879 // does not have this problem.
3880 if (Atomic::xchg(1, &vm_created) == 1) {
3881 return JNI_EEXIST; // already created, or create attempt in progress
3882 }
3883 if (Atomic::xchg(0, &safe_to_recreate_vm) == 0) {
3884 return JNI_ERR; // someone tried and failed and retry not allowed.
3885 }
3886
3887 assert(vm_created == 1, "vm_created is true during the creation");
3888
3889 /**
3890 * Certain errors during initialization are recoverable and do not
3891 * prevent this method from being called again at a later time
3892 * (perhaps with different arguments). However, at a certain
3893 * point during initialization if an error occurs we cannot allow
3894 * this function to be called again (or it will crash). In those
3895 * situations, the 'canTryAgain' flag is set to false, which atomically
3896 * sets safe_to_recreate_vm to 1, such that any new call to
3897 * JNI_CreateJavaVM will immediately fail using the above logic.
3898 */
3899 bool can_try_again = true;
3900
3901 result = Threads::create_vm((JavaVMInitArgs*) args, &can_try_again);
3902 if (result == JNI_OK) {
3903 JavaThread *thread = JavaThread::current();
3904 assert(!thread->has_pending_exception(), "should have returned not OK");
3905 /* thread is thread_in_vm here */
3906 *vm = (JavaVM *)(&main_vm);
3907 *(JNIEnv**)penv = thread->jni_environment();
3908
3909 #if INCLUDE_JVMCI
3910 if (EnableJVMCI) {
3911 if (UseJVMCICompiler) {
3912 // JVMCI is initialized on a CompilerThread
3913 if (BootstrapJVMCI) {
3914 JavaThread* THREAD = thread;
3915 JVMCICompiler* compiler = JVMCICompiler::instance(CATCH);
3916 compiler->bootstrap();
3917 }
3918 }
3919 }
3920 #endif
3921
3922 // Tracks the time application was running before GC
3923 RuntimeService::record_application_start();
3924
3925 // Notify JVMTI
3926 if (JvmtiExport::should_post_thread_life()) {
3927 JvmtiExport::post_thread_start(thread);
3928 }
3929
3930 EventThreadStart event;
3931 if (event.should_commit()) {
3932 event.set_javalangthread(java_lang_Thread::thread_id(thread->threadObj()));
3933 event.commit();
3934 }
3935
3936 #ifndef PRODUCT
3937 // Check if we should compile all classes on bootclasspath
3938 if (CompileTheWorld) ClassLoader::compile_the_world();
3939 if (ReplayCompiles) ciReplay::replay(thread);
3940
3941 // Some platforms (like Win*) need a wrapper around these test
3942 // functions in order to properly handle error conditions.
3943 test_error_handler();
3944 if (ExecuteInternalVMTests) {
3945 InternalVMTests::run();
3946 }
3947 #endif
3948
3949 // Since this is not a JVM_ENTRY we have to set the thread state manually before leaving.
3950 ThreadStateTransition::transition_and_fence(thread, _thread_in_vm, _thread_in_native);
3951 } else {
3952 // If create_vm exits because of a pending exception, exit with that
3953 // exception. In the future when we figure out how to reclaim memory,
3954 // we may be able to exit with JNI_ERR and allow the calling application
3955 // to continue.
3956 if (Universe::is_fully_initialized()) {
3957 // otherwise no pending exception possible - VM will already have aborted
3958 JavaThread* THREAD = JavaThread::current();
3959 if (HAS_PENDING_EXCEPTION) {
3960 HandleMark hm;
3961 vm_exit_during_initialization(Handle(THREAD, PENDING_EXCEPTION));
3962 }
3963 }
3964
3965 if (can_try_again) {
3966 // reset safe_to_recreate_vm to 1 so that retrial would be possible
3967 safe_to_recreate_vm = 1;
3968 }
3969
3970 // Creation failed. We must reset vm_created
3971 *vm = 0;
3972 *(JNIEnv**)penv = 0;
3973 // reset vm_created last to avoid race condition. Use OrderAccess to
3974 // control both compiler and architectural-based reordering.
3975 OrderAccess::release_store(&vm_created, 0);
3976 }
3977
3978 // Flush stdout and stderr before exit.
3979 fflush(stdout);
3980 fflush(stderr);
3981
3982 return result;
3983
3984 }
3985
3986 _JNI_IMPORT_OR_EXPORT_ jint JNICALL JNI_CreateJavaVM(JavaVM **vm, void **penv, void *args) {
3987 jint result = 0;
3988 // On Windows, let CreateJavaVM run with SEH protection
3989 #ifdef _WIN32
3990 __try {
3991 #endif
3992 result = JNI_CreateJavaVM_inner(vm, penv, args);
3993 #ifdef _WIN32
3994 } __except(topLevelExceptionFilter((_EXCEPTION_POINTERS*)_exception_info())) {
3995 // Nothing to do.
3996 }
3997 #endif
3998 return result;
3999 }
4000
4001 _JNI_IMPORT_OR_EXPORT_ jint JNICALL JNI_GetCreatedJavaVMs(JavaVM **vm_buf, jsize bufLen, jsize *numVMs) {
4002 // See bug 4367188, the wrapper can sometimes cause VM crashes
4003 // JNIWrapper("GetCreatedJavaVMs");
4004
4005 HOTSPOT_JNI_GETCREATEDJAVAVMS_ENTRY((void **) vm_buf, bufLen, (uintptr_t *) numVMs);
4006
4007 if (vm_created) {
4008 if (numVMs != NULL) *numVMs = 1;
4009 if (bufLen > 0) *vm_buf = (JavaVM *)(&main_vm);
4010 } else {
4011 if (numVMs != NULL) *numVMs = 0;
4012 }
4013 HOTSPOT_JNI_GETCREATEDJAVAVMS_RETURN(JNI_OK);
4014 return JNI_OK;
4015 }
4016
4017 extern "C" {
4018
4019 DT_RETURN_MARK_DECL(DestroyJavaVM, jint
4020 , HOTSPOT_JNI_DESTROYJAVAVM_RETURN(_ret_ref));
4021
4022 jint JNICALL jni_DestroyJavaVM(JavaVM *vm) {
4023 HOTSPOT_JNI_DESTROYJAVAVM_ENTRY(vm);
4024 jint res = JNI_ERR;
4025 DT_RETURN_MARK(DestroyJavaVM, jint, (const jint&)res);
4026
4027 if (!vm_created) {
4028 res = JNI_ERR;
4029 return res;
4030 }
4031
4032 JNIWrapper("DestroyJavaVM");
4033 JNIEnv *env;
4034 JavaVMAttachArgs destroyargs;
4035 destroyargs.version = CurrentVersion;
4036 destroyargs.name = (char *)"DestroyJavaVM";
4037 destroyargs.group = NULL;
4038 res = vm->AttachCurrentThread((void **)&env, (void *)&destroyargs);
4039 if (res != JNI_OK) {
4040 return res;
4041 }
4042
4043 // Since this is not a JVM_ENTRY we have to set the thread state manually before entering.
4044 JavaThread* thread = JavaThread::current();
4045 ThreadStateTransition::transition_from_native(thread, _thread_in_vm);
4046 if (Threads::destroy_vm()) {
4047 // Should not change thread state, VM is gone
4048 vm_created = false;
4049 res = JNI_OK;
4050 return res;
4051 } else {
4052 ThreadStateTransition::transition_and_fence(thread, _thread_in_vm, _thread_in_native);
4053 res = JNI_ERR;
4054 return res;
4055 }
4056 }
4057
4058
4059 static jint attach_current_thread(JavaVM *vm, void **penv, void *_args, bool daemon) {
4060 JavaVMAttachArgs *args = (JavaVMAttachArgs *) _args;
4061
4062 // Check below commented out from JDK1.2fcs as well
4063 /*
4064 if (args && (args->version != JNI_VERSION_1_1 || args->version != JNI_VERSION_1_2)) {
4065 return JNI_EVERSION;
4066 }
4067 */
4068
4069 Thread* t = Thread::current_or_null();
4070 if (t != NULL) {
4071 // If the thread has been attached this operation is a no-op
4072 *(JNIEnv**)penv = ((JavaThread*) t)->jni_environment();
4073 return JNI_OK;
4074 }
4075
4076 // Create a thread and mark it as attaching so it will be skipped by the
4077 // ThreadsListEnumerator - see CR 6404306
4078 JavaThread* thread = new JavaThread(true);
4079
4080 // Set correct safepoint info. The thread is going to call into Java when
4081 // initializing the Java level thread object. Hence, the correct state must
4082 // be set in order for the Safepoint code to deal with it correctly.
4083 thread->set_thread_state(_thread_in_vm);
4084 thread->record_stack_base_and_size();
4085 thread->initialize_thread_current();
4086
4087 if (!os::create_attached_thread(thread)) {
4088 delete thread;
4089 return JNI_ERR;
4090 }
4091 // Enable stack overflow checks
4092 thread->create_stack_guard_pages();
4093
4094 thread->initialize_tlab();
4095
4096 thread->cache_global_variables();
4097
4098 // Crucial that we do not have a safepoint check for this thread, since it has
4099 // not been added to the Thread list yet.
4100 { Threads_lock->lock_without_safepoint_check();
4101 // This must be inside this lock in order to get FullGCALot to work properly, i.e., to
4102 // avoid this thread trying to do a GC before it is added to the thread-list
4103 thread->set_active_handles(JNIHandleBlock::allocate_block());
4104 Threads::add(thread, daemon);
4105 Threads_lock->unlock();
4106 }
4107 // Create thread group and name info from attach arguments
4108 oop group = NULL;
4109 char* thread_name = NULL;
4110 if (args != NULL && Threads::is_supported_jni_version(args->version)) {
4111 group = JNIHandles::resolve(args->group);
4112 thread_name = args->name; // may be NULL
4113 }
4114 if (group == NULL) group = Universe::main_thread_group();
4115
4116 // Create Java level thread object and attach it to this thread
4117 bool attach_failed = false;
4118 {
4119 EXCEPTION_MARK;
4120 HandleMark hm(THREAD);
4121 Handle thread_group(THREAD, group);
4122 thread->allocate_threadObj(thread_group, thread_name, daemon, THREAD);
4123 if (HAS_PENDING_EXCEPTION) {
4124 CLEAR_PENDING_EXCEPTION;
4125 // cleanup outside the handle mark.
4126 attach_failed = true;
4127 }
4128 }
4129
4130 if (attach_failed) {
4131 // Added missing cleanup
4132 thread->cleanup_failed_attach_current_thread();
4133 return JNI_ERR;
4134 }
4135
4136 // mark the thread as no longer attaching
4137 // this uses a fence to push the change through so we don't have
4138 // to regrab the threads_lock
4139 thread->set_done_attaching_via_jni();
4140
4141 // Set java thread status.
4142 java_lang_Thread::set_thread_status(thread->threadObj(),
4143 java_lang_Thread::RUNNABLE);
4144
4145 // Notify the debugger
4146 if (JvmtiExport::should_post_thread_life()) {
4147 JvmtiExport::post_thread_start(thread);
4148 }
4149
4150 EventThreadStart event;
4151 if (event.should_commit()) {
4152 event.set_javalangthread(java_lang_Thread::thread_id(thread->threadObj()));
4153 event.commit();
4154 }
4155
4156 *(JNIEnv**)penv = thread->jni_environment();
4157
4158 // Now leaving the VM, so change thread_state. This is normally automatically taken care
4159 // of in the JVM_ENTRY. But in this situation we have to do it manually. Notice, that by
4160 // using ThreadStateTransition::transition, we do a callback to the safepoint code if
4161 // needed.
4162
4163 ThreadStateTransition::transition_and_fence(thread, _thread_in_vm, _thread_in_native);
4164
4165 // Perform any platform dependent FPU setup
4166 os::setup_fpu();
4167
4168 return JNI_OK;
4169 }
4170
4171
4172 jint JNICALL jni_AttachCurrentThread(JavaVM *vm, void **penv, void *_args) {
4173 HOTSPOT_JNI_ATTACHCURRENTTHREAD_ENTRY(vm, penv, _args);
4174 if (!vm_created) {
4175 HOTSPOT_JNI_ATTACHCURRENTTHREAD_RETURN((uint32_t) JNI_ERR);
4176 return JNI_ERR;
4177 }
4178
4179 JNIWrapper("AttachCurrentThread");
4180 jint ret = attach_current_thread(vm, penv, _args, false);
4181 HOTSPOT_JNI_ATTACHCURRENTTHREAD_RETURN(ret);
4182 return ret;
4183 }
4184
4185
4186 jint JNICALL jni_DetachCurrentThread(JavaVM *vm) {
4187 HOTSPOT_JNI_DETACHCURRENTTHREAD_ENTRY(vm);
4188 VM_Exit::block_if_vm_exited();
4189
4190 JNIWrapper("DetachCurrentThread");
4191
4192 // If the thread has already been detached the operation is a no-op
4193 if (Thread::current_or_null() == NULL) {
4194 HOTSPOT_JNI_DETACHCURRENTTHREAD_RETURN(JNI_OK);
4195 return JNI_OK;
4196 }
4197
4198 JavaThread* thread = JavaThread::current();
4199 if (thread->has_last_Java_frame()) {
4200 HOTSPOT_JNI_DETACHCURRENTTHREAD_RETURN((uint32_t) JNI_ERR);
4201 // Can't detach a thread that's running java, that can't work.
4202 return JNI_ERR;
4203 }
4204
4205 // Safepoint support. Have to do call-back to safepoint code, if in the
4206 // middel of a safepoint operation
4207 ThreadStateTransition::transition_from_native(thread, _thread_in_vm);
4208
4209 // XXX: Note that JavaThread::exit() call below removes the guards on the
4210 // stack pages set up via enable_stack_{red,yellow}_zone() calls
4211 // above in jni_AttachCurrentThread. Unfortunately, while the setting
4212 // of the guards is visible in jni_AttachCurrentThread above,
4213 // the removal of the guards is buried below in JavaThread::exit()
4214 // here. The abstraction should be more symmetrically either exposed
4215 // or hidden (e.g. it could probably be hidden in the same
4216 // (platform-dependent) methods where we do alternate stack
4217 // maintenance work?)
4218 thread->exit(false, JavaThread::jni_detach);
4219 delete thread;
4220
4221 HOTSPOT_JNI_DETACHCURRENTTHREAD_RETURN(JNI_OK);
4222 return JNI_OK;
4223 }
4224
4225 DT_RETURN_MARK_DECL(GetEnv, jint
4226 , HOTSPOT_JNI_GETENV_RETURN(_ret_ref));
4227
4228 jint JNICALL jni_GetEnv(JavaVM *vm, void **penv, jint version) {
4229 HOTSPOT_JNI_GETENV_ENTRY(vm, penv, version);
4230 jint ret = JNI_ERR;
4231 DT_RETURN_MARK(GetEnv, jint, (const jint&)ret);
4232
4233 if (!vm_created) {
4234 *penv = NULL;
4235 ret = JNI_EDETACHED;
4236 return ret;
4237 }
4238
4239 if (JniExportedInterface::GetExportedInterface(vm, penv, version, &ret)) {
4240 return ret;
4241 }
4242
4243 #ifndef JVMPI_VERSION_1
4244 // need these in order to be polite about older agents
4245 #define JVMPI_VERSION_1 ((jint)0x10000001)
4246 #define JVMPI_VERSION_1_1 ((jint)0x10000002)
4247 #define JVMPI_VERSION_1_2 ((jint)0x10000003)
4248 #endif // !JVMPI_VERSION_1
4249
4250 Thread* thread = Thread::current_or_null();
4251 if (thread != NULL && thread->is_Java_thread()) {
4252 if (Threads::is_supported_jni_version_including_1_1(version)) {
4253 *(JNIEnv**)penv = ((JavaThread*) thread)->jni_environment();
4254 ret = JNI_OK;
4255 return ret;
4256
4257 } else if (version == JVMPI_VERSION_1 ||
4258 version == JVMPI_VERSION_1_1 ||
4259 version == JVMPI_VERSION_1_2) {
4260 tty->print_cr("ERROR: JVMPI, an experimental interface, is no longer supported.");
4261 tty->print_cr("Please use the supported interface: the JVM Tool Interface (JVM TI).");
4262 ret = JNI_EVERSION;
4263 return ret;
4264 } else if (JvmtiExport::is_jvmdi_version(version)) {
4265 tty->print_cr("FATAL ERROR: JVMDI is no longer supported.");
4266 tty->print_cr("Please use the supported interface: the JVM Tool Interface (JVM TI).");
4267 ret = JNI_EVERSION;
4268 return ret;
4269 } else {
4270 *penv = NULL;
4271 ret = JNI_EVERSION;
4272 return ret;
4273 }
4274 } else {
4275 *penv = NULL;
4276 ret = JNI_EDETACHED;
4277 return ret;
4278 }
4279 }
4280
4281
4282 jint JNICALL jni_AttachCurrentThreadAsDaemon(JavaVM *vm, void **penv, void *_args) {
4283 HOTSPOT_JNI_ATTACHCURRENTTHREADASDAEMON_ENTRY(vm, penv, _args);
4284 if (!vm_created) {
4285 HOTSPOT_JNI_ATTACHCURRENTTHREADASDAEMON_RETURN((uint32_t) JNI_ERR);
4286 return JNI_ERR;
4287 }
4288
4289 JNIWrapper("AttachCurrentThreadAsDaemon");
4290 jint ret = attach_current_thread(vm, penv, _args, true);
4291 HOTSPOT_JNI_ATTACHCURRENTTHREADASDAEMON_RETURN(ret);
4292 return ret;
4293 }
4294
4295
4296 } // End extern "C"
4297
4298 const struct JNIInvokeInterface_ jni_InvokeInterface = {
4299 NULL,
4300 NULL,
4301 NULL,
4302
4303 jni_DestroyJavaVM,
4304 jni_AttachCurrentThread,
4305 jni_DetachCurrentThread,
4306 jni_GetEnv,
4307 jni_AttachCurrentThreadAsDaemon
4308 };