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_9_0;
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 #ifdef va_copy
934 va_copy(_ap, rap);
935 #elif defined (__va_copy)
936 __va_copy(_ap, rap);
937 #else
938 _ap = rap;
939 #endif
940 }
941
942 public:
943 JNI_ArgumentPusherVaArg(Symbol* signature, va_list rap)
944 : JNI_ArgumentPusher(signature) {
945 set_ap(rap);
946 }
947 JNI_ArgumentPusherVaArg(jmethodID method_id, va_list rap)
948 : JNI_ArgumentPusher(Method::resolve_jmethod_id(method_id)->signature()) {
949 set_ap(rap);
950 }
951
952 // Optimized path if we have the bitvector form of signature
953 void iterate( uint64_t fingerprint ) {
954 if (fingerprint == (uint64_t)CONST64(-1)) {
955 SignatureIterator::iterate(); // Must be too many arguments
956 } else {
957 _return_type = (BasicType)((fingerprint >> static_feature_size) &
958 result_feature_mask);
959
960 assert(fingerprint, "Fingerprint should not be 0");
961 fingerprint = fingerprint >> (static_feature_size + result_feature_size);
962 while ( 1 ) {
963 switch ( fingerprint & parameter_feature_mask ) {
964 case bool_parm:
965 case char_parm:
966 case short_parm:
967 case byte_parm:
968 case int_parm:
969 get_int();
970 break;
971 case obj_parm:
972 get_object();
973 break;
974 case long_parm:
975 get_long();
976 break;
977 case float_parm:
978 get_float();
979 break;
980 case double_parm:
981 get_double();
982 break;
983 case done_parm:
984 return;
985 break;
986 default:
987 ShouldNotReachHere();
988 break;
989 }
990 fingerprint >>= parameter_feature_size;
991 }
992 }
993 }
994 };
995
996
997 class JNI_ArgumentPusherArray : public JNI_ArgumentPusher {
998 protected:
999 const jvalue *_ap;
1000
1001 inline void get_bool() { _arguments->push_int((jint)(_ap++)->z); }
1002 inline void get_char() { _arguments->push_int((jint)(_ap++)->c); }
1003 inline void get_short() { _arguments->push_int((jint)(_ap++)->s); }
1004 inline void get_byte() { _arguments->push_int((jint)(_ap++)->b); }
1005 inline void get_int() { _arguments->push_int((jint)(_ap++)->i); }
1006
1007 inline void get_long() { _arguments->push_long((_ap++)->j); }
1008 inline void get_float() { _arguments->push_float((_ap++)->f); }
1009 inline void get_double() { _arguments->push_double((_ap++)->d);}
1010 inline void get_object() { _arguments->push_oop(Handle((oop *)(_ap++)->l, false)); }
1011
1012 inline void set_ap(const jvalue *rap) { _ap = rap; }
1013
1014 public:
1015 JNI_ArgumentPusherArray(Symbol* signature, const jvalue *rap)
1016 : JNI_ArgumentPusher(signature) {
1017 set_ap(rap);
1018 }
1019 JNI_ArgumentPusherArray(jmethodID method_id, const jvalue *rap)
1020 : JNI_ArgumentPusher(Method::resolve_jmethod_id(method_id)->signature()) {
1021 set_ap(rap);
1022 }
1023
1024 // Optimized path if we have the bitvector form of signature
1025 void iterate( uint64_t fingerprint ) {
1026 if (fingerprint == (uint64_t)CONST64(-1)) {
1027 SignatureIterator::iterate(); // Must be too many arguments
1028 } else {
1029 _return_type = (BasicType)((fingerprint >> static_feature_size) &
1030 result_feature_mask);
1031 assert(fingerprint, "Fingerprint should not be 0");
1032 fingerprint = fingerprint >> (static_feature_size + result_feature_size);
1033 while ( 1 ) {
1034 switch ( fingerprint & parameter_feature_mask ) {
1035 case bool_parm:
1036 get_bool();
1037 break;
1038 case char_parm:
1039 get_char();
1040 break;
1041 case short_parm:
1042 get_short();
1043 break;
1044 case byte_parm:
1045 get_byte();
1046 break;
1047 case int_parm:
1048 get_int();
1049 break;
1050 case obj_parm:
1051 get_object();
1052 break;
1053 case long_parm:
1054 get_long();
1055 break;
1056 case float_parm:
1057 get_float();
1058 break;
1059 case double_parm:
1060 get_double();
1061 break;
1062 case done_parm:
1063 return;
1064 break;
1065 default:
1066 ShouldNotReachHere();
1067 break;
1068 }
1069 fingerprint >>= parameter_feature_size;
1070 }
1071 }
1072 }
1073 };
1074
1075
1076 enum JNICallType {
1077 JNI_STATIC,
1078 JNI_VIRTUAL,
1079 JNI_NONVIRTUAL
1080 };
1081
1082
1083
1084 static void jni_invoke_static(JNIEnv *env, JavaValue* result, jobject receiver, JNICallType call_type, jmethodID method_id, JNI_ArgumentPusher *args, TRAPS) {
1085 methodHandle method(THREAD, Method::resolve_jmethod_id(method_id));
1086
1087 // Create object to hold arguments for the JavaCall, and associate it with
1088 // the jni parser
1089 ResourceMark rm(THREAD);
1090 int number_of_parameters = method->size_of_parameters();
1091 JavaCallArguments java_args(number_of_parameters);
1092 args->set_java_argument_object(&java_args);
1093
1094 assert(method->is_static(), "method should be static");
1095
1096 // Fill out JavaCallArguments object
1097 args->iterate( Fingerprinter(method).fingerprint() );
1098 // Initialize result type
1099 result->set_type(args->get_ret_type());
1100
1101 // Invoke the method. Result is returned as oop.
1102 JavaCalls::call(result, method, &java_args, CHECK);
1103
1104 // Convert result
1105 if (result->get_type() == T_OBJECT || result->get_type() == T_ARRAY) {
1106 result->set_jobject(JNIHandles::make_local(env, (oop) result->get_jobject()));
1107 }
1108 }
1109
1110
1111 static void jni_invoke_nonstatic(JNIEnv *env, JavaValue* result, jobject receiver, JNICallType call_type, jmethodID method_id, JNI_ArgumentPusher *args, TRAPS) {
1112 oop recv = JNIHandles::resolve(receiver);
1113 if (recv == NULL) {
1114 THROW(vmSymbols::java_lang_NullPointerException());
1115 }
1116 Handle h_recv(THREAD, recv);
1117
1118 int number_of_parameters;
1119 Method* selected_method;
1120 {
1121 Method* m = Method::resolve_jmethod_id(method_id);
1122 number_of_parameters = m->size_of_parameters();
1123 Klass* holder = m->method_holder();
1124 if (call_type != JNI_VIRTUAL) {
1125 selected_method = m;
1126 } else if (!m->has_itable_index()) {
1127 // non-interface call -- for that little speed boost, don't handlize
1128 debug_only(NoSafepointVerifier nosafepoint;)
1129 // jni_GetMethodID makes sure class is linked and initialized
1130 // so m should have a valid vtable index.
1131 assert(m->valid_vtable_index(), "no valid vtable index");
1132 int vtbl_index = m->vtable_index();
1133 if (vtbl_index != Method::nonvirtual_vtable_index) {
1134 Klass* k = h_recv->klass();
1135 // k might be an arrayKlassOop but all vtables start at
1136 // the same place. The cast is to avoid virtual call and assertion.
1137 InstanceKlass *ik = (InstanceKlass*)k;
1138 selected_method = ik->method_at_vtable(vtbl_index);
1139 } else {
1140 // final method
1141 selected_method = m;
1142 }
1143 } else {
1144 // interface call
1145 KlassHandle h_holder(THREAD, holder);
1146
1147 int itbl_index = m->itable_index();
1148 Klass* k = h_recv->klass();
1149 selected_method = InstanceKlass::cast(k)->method_at_itable(h_holder(), itbl_index, CHECK);
1150 }
1151 }
1152
1153 methodHandle method(THREAD, selected_method);
1154
1155 // Create object to hold arguments for the JavaCall, and associate it with
1156 // the jni parser
1157 ResourceMark rm(THREAD);
1158 JavaCallArguments java_args(number_of_parameters);
1159 args->set_java_argument_object(&java_args);
1160
1161 // handle arguments
1162 assert(!method->is_static(), "method should not be static");
1163 args->push_receiver(h_recv); // Push jobject handle
1164
1165 // Fill out JavaCallArguments object
1166 args->iterate( Fingerprinter(method).fingerprint() );
1167 // Initialize result type
1168 result->set_type(args->get_ret_type());
1169
1170 // Invoke the method. Result is returned as oop.
1171 JavaCalls::call(result, method, &java_args, CHECK);
1172
1173 // Convert result
1174 if (result->get_type() == T_OBJECT || result->get_type() == T_ARRAY) {
1175 result->set_jobject(JNIHandles::make_local(env, (oop) result->get_jobject()));
1176 }
1177 }
1178
1179
1180 static instanceOop alloc_object(jclass clazz, TRAPS) {
1181 KlassHandle k(THREAD, java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz)));
1182 if (k == NULL) {
1183 ResourceMark rm(THREAD);
1184 THROW_(vmSymbols::java_lang_InstantiationException(), NULL);
1185 }
1186 k()->check_valid_for_instantiation(false, CHECK_NULL);
1187 InstanceKlass::cast(k())->initialize(CHECK_NULL);
1188 instanceOop ih = InstanceKlass::cast(k())->allocate_instance(THREAD);
1189 return ih;
1190 }
1191
1192 DT_RETURN_MARK_DECL(AllocObject, jobject
1193 , HOTSPOT_JNI_ALLOCOBJECT_RETURN(_ret_ref));
1194
1195 JNI_ENTRY(jobject, jni_AllocObject(JNIEnv *env, jclass clazz))
1196 JNIWrapper("AllocObject");
1197
1198 HOTSPOT_JNI_ALLOCOBJECT_ENTRY(env, clazz);
1199
1200 jobject ret = NULL;
1201 DT_RETURN_MARK(AllocObject, jobject, (const jobject&)ret);
1202
1203 instanceOop i = alloc_object(clazz, CHECK_NULL);
1204 ret = JNIHandles::make_local(env, i);
1205 return ret;
1206 JNI_END
1207
1208 DT_RETURN_MARK_DECL(NewObjectA, jobject
1209 , HOTSPOT_JNI_NEWOBJECTA_RETURN(_ret_ref));
1210
1211 JNI_ENTRY(jobject, jni_NewObjectA(JNIEnv *env, jclass clazz, jmethodID methodID, const jvalue *args))
1212 JNIWrapper("NewObjectA");
1213
1214 HOTSPOT_JNI_NEWOBJECTA_ENTRY(env, clazz, (uintptr_t) methodID);
1215
1216 jobject obj = NULL;
1217 DT_RETURN_MARK(NewObjectA, jobject, (const jobject)obj);
1218
1219 instanceOop i = alloc_object(clazz, CHECK_NULL);
1220 obj = JNIHandles::make_local(env, i);
1221 JavaValue jvalue(T_VOID);
1222 JNI_ArgumentPusherArray ap(methodID, args);
1223 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_NULL);
1224 return obj;
1225 JNI_END
1226
1227
1228 DT_RETURN_MARK_DECL(NewObjectV, jobject
1229 , HOTSPOT_JNI_NEWOBJECTV_RETURN(_ret_ref));
1230
1231 JNI_ENTRY(jobject, jni_NewObjectV(JNIEnv *env, jclass clazz, jmethodID methodID, va_list args))
1232 JNIWrapper("NewObjectV");
1233
1234 HOTSPOT_JNI_NEWOBJECTV_ENTRY(env, clazz, (uintptr_t) methodID);
1235
1236 jobject obj = NULL;
1237 DT_RETURN_MARK(NewObjectV, jobject, (const jobject&)obj);
1238
1239 instanceOop i = alloc_object(clazz, CHECK_NULL);
1240 obj = JNIHandles::make_local(env, i);
1241 JavaValue jvalue(T_VOID);
1242 JNI_ArgumentPusherVaArg ap(methodID, args);
1243 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_NULL);
1244 return obj;
1245 JNI_END
1246
1247
1248 DT_RETURN_MARK_DECL(NewObject, jobject
1249 , HOTSPOT_JNI_NEWOBJECT_RETURN(_ret_ref));
1250
1251 JNI_ENTRY(jobject, jni_NewObject(JNIEnv *env, jclass clazz, jmethodID methodID, ...))
1252 JNIWrapper("NewObject");
1253
1254 HOTSPOT_JNI_NEWOBJECT_ENTRY(env, clazz, (uintptr_t) methodID);
1255
1256 jobject obj = NULL;
1257 DT_RETURN_MARK(NewObject, jobject, (const jobject&)obj);
1258
1259 instanceOop i = alloc_object(clazz, CHECK_NULL);
1260 obj = JNIHandles::make_local(env, i);
1261 va_list args;
1262 va_start(args, methodID);
1263 JavaValue jvalue(T_VOID);
1264 JNI_ArgumentPusherVaArg ap(methodID, args);
1265 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_NULL);
1266 va_end(args);
1267 return obj;
1268 JNI_END
1269
1270
1271 JNI_ENTRY(jclass, jni_GetObjectClass(JNIEnv *env, jobject obj))
1272 JNIWrapper("GetObjectClass");
1273
1274 HOTSPOT_JNI_GETOBJECTCLASS_ENTRY(env, obj);
1275
1276 Klass* k = JNIHandles::resolve_non_null(obj)->klass();
1277 jclass ret =
1278 (jclass) JNIHandles::make_local(env, k->java_mirror());
1279
1280 HOTSPOT_JNI_GETOBJECTCLASS_RETURN(ret);
1281 return ret;
1282 JNI_END
1283
1284 JNI_QUICK_ENTRY(jboolean, jni_IsInstanceOf(JNIEnv *env, jobject obj, jclass clazz))
1285 JNIWrapper("IsInstanceOf");
1286
1287 HOTSPOT_JNI_ISINSTANCEOF_ENTRY(env, obj, clazz);
1288
1289 jboolean ret = JNI_TRUE;
1290 if (obj != NULL) {
1291 ret = JNI_FALSE;
1292 Klass* k = java_lang_Class::as_Klass(
1293 JNIHandles::resolve_non_null(clazz));
1294 if (k != NULL) {
1295 ret = JNIHandles::resolve_non_null(obj)->is_a(k) ? JNI_TRUE : JNI_FALSE;
1296 }
1297 }
1298
1299 HOTSPOT_JNI_ISINSTANCEOF_RETURN(ret);
1300 return ret;
1301 JNI_END
1302
1303
1304 static jmethodID get_method_id(JNIEnv *env, jclass clazz, const char *name_str,
1305 const char *sig, bool is_static, TRAPS) {
1306 // %%%% This code should probably just call into a method in the LinkResolver
1307 //
1308 // The class should have been loaded (we have an instance of the class
1309 // passed in) so the method and signature should already be in the symbol
1310 // table. If they're not there, the method doesn't exist.
1311 const char *name_to_probe = (name_str == NULL)
1312 ? vmSymbols::object_initializer_name()->as_C_string()
1313 : name_str;
1314 TempNewSymbol name = SymbolTable::probe(name_to_probe, (int)strlen(name_to_probe));
1315 TempNewSymbol signature = SymbolTable::probe(sig, (int)strlen(sig));
1316
1317 if (name == NULL || signature == NULL) {
1318 THROW_MSG_0(vmSymbols::java_lang_NoSuchMethodError(), name_str);
1319 }
1320
1321 // Throw a NoSuchMethodError exception if we have an instance of a
1322 // primitive java.lang.Class
1323 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(clazz))) {
1324 THROW_MSG_0(vmSymbols::java_lang_NoSuchMethodError(), name_str);
1325 }
1326
1327 KlassHandle klass(THREAD,
1328 java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz)));
1329
1330 // Make sure class is linked and initialized before handing id's out to
1331 // Method*s.
1332 klass()->initialize(CHECK_NULL);
1333
1334 Method* m;
1335 if (name == vmSymbols::object_initializer_name() ||
1336 name == vmSymbols::class_initializer_name()) {
1337 // Never search superclasses for constructors
1338 if (klass->is_instance_klass()) {
1339 m = InstanceKlass::cast(klass())->find_method(name, signature);
1340 } else {
1341 m = NULL;
1342 }
1343 } else {
1344 m = klass->lookup_method(name, signature);
1345 if (m == NULL && klass->is_instance_klass()) {
1346 m = InstanceKlass::cast(klass())->lookup_method_in_ordered_interfaces(name, signature);
1347 }
1348 }
1349 if (m == NULL || (m->is_static() != is_static)) {
1350 THROW_MSG_0(vmSymbols::java_lang_NoSuchMethodError(), name_str);
1351 }
1352 return m->jmethod_id();
1353 }
1354
1355
1356 JNI_ENTRY(jmethodID, jni_GetMethodID(JNIEnv *env, jclass clazz,
1357 const char *name, const char *sig))
1358 JNIWrapper("GetMethodID");
1359 HOTSPOT_JNI_GETMETHODID_ENTRY(env, clazz, (char *) name, (char *) sig);
1360 jmethodID ret = get_method_id(env, clazz, name, sig, false, thread);
1361 HOTSPOT_JNI_GETMETHODID_RETURN((uintptr_t) ret);
1362 return ret;
1363 JNI_END
1364
1365
1366 JNI_ENTRY(jmethodID, jni_GetStaticMethodID(JNIEnv *env, jclass clazz,
1367 const char *name, const char *sig))
1368 JNIWrapper("GetStaticMethodID");
1369 HOTSPOT_JNI_GETSTATICMETHODID_ENTRY(env, (char *) clazz, (char *) name, (char *)sig);
1370 jmethodID ret = get_method_id(env, clazz, name, sig, true, thread);
1371 HOTSPOT_JNI_GETSTATICMETHODID_RETURN((uintptr_t) ret);
1372 return ret;
1373 JNI_END
1374
1375
1376
1377 //
1378 // Calling Methods
1379 //
1380
1381
1382 #define DEFINE_CALLMETHOD(ResultType, Result, Tag \
1383 , EntryProbe, ReturnProbe) \
1384 \
1385 DT_RETURN_MARK_DECL_FOR(Result, Call##Result##Method, ResultType \
1386 , ReturnProbe); \
1387 \
1388 JNI_ENTRY(ResultType, \
1389 jni_Call##Result##Method(JNIEnv *env, jobject obj, jmethodID methodID, ...)) \
1390 JNIWrapper("Call" XSTR(Result) "Method"); \
1391 \
1392 EntryProbe; \
1393 ResultType ret = 0;\
1394 DT_RETURN_MARK_FOR(Result, Call##Result##Method, ResultType, \
1395 (const ResultType&)ret);\
1396 \
1397 va_list args; \
1398 va_start(args, methodID); \
1399 JavaValue jvalue(Tag); \
1400 JNI_ArgumentPusherVaArg ap(methodID, args); \
1401 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK_0); \
1402 va_end(args); \
1403 ret = jvalue.get_##ResultType(); \
1404 return ret;\
1405 JNI_END
1406
1407 // the runtime type of subword integral basic types is integer
1408 DEFINE_CALLMETHOD(jboolean, Boolean, T_BOOLEAN
1409 , HOTSPOT_JNI_CALLBOOLEANMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1410 HOTSPOT_JNI_CALLBOOLEANMETHOD_RETURN(_ret_ref))
1411 DEFINE_CALLMETHOD(jbyte, Byte, T_BYTE
1412 , HOTSPOT_JNI_CALLBYTEMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1413 HOTSPOT_JNI_CALLBYTEMETHOD_RETURN(_ret_ref))
1414 DEFINE_CALLMETHOD(jchar, Char, T_CHAR
1415 , HOTSPOT_JNI_CALLCHARMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1416 HOTSPOT_JNI_CALLCHARMETHOD_RETURN(_ret_ref))
1417 DEFINE_CALLMETHOD(jshort, Short, T_SHORT
1418 , HOTSPOT_JNI_CALLSHORTMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1419 HOTSPOT_JNI_CALLSHORTMETHOD_RETURN(_ret_ref))
1420
1421 DEFINE_CALLMETHOD(jobject, Object, T_OBJECT
1422 , HOTSPOT_JNI_CALLOBJECTMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1423 HOTSPOT_JNI_CALLOBJECTMETHOD_RETURN(_ret_ref))
1424 DEFINE_CALLMETHOD(jint, Int, T_INT,
1425 HOTSPOT_JNI_CALLINTMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1426 HOTSPOT_JNI_CALLINTMETHOD_RETURN(_ret_ref))
1427 DEFINE_CALLMETHOD(jlong, Long, T_LONG
1428 , HOTSPOT_JNI_CALLLONGMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1429 HOTSPOT_JNI_CALLLONGMETHOD_RETURN(_ret_ref))
1430 // Float and double probes don't return value because dtrace doesn't currently support it
1431 DEFINE_CALLMETHOD(jfloat, Float, T_FLOAT
1432 , HOTSPOT_JNI_CALLFLOATMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1433 HOTSPOT_JNI_CALLFLOATMETHOD_RETURN())
1434 DEFINE_CALLMETHOD(jdouble, Double, T_DOUBLE
1435 , HOTSPOT_JNI_CALLDOUBLEMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1436 HOTSPOT_JNI_CALLDOUBLEMETHOD_RETURN())
1437
1438 #define DEFINE_CALLMETHODV(ResultType, Result, Tag \
1439 , EntryProbe, ReturnProbe) \
1440 \
1441 DT_RETURN_MARK_DECL_FOR(Result, Call##Result##MethodV, ResultType \
1442 , ReturnProbe); \
1443 \
1444 JNI_ENTRY(ResultType, \
1445 jni_Call##Result##MethodV(JNIEnv *env, jobject obj, jmethodID methodID, va_list args)) \
1446 JNIWrapper("Call" XSTR(Result) "MethodV"); \
1447 \
1448 EntryProbe;\
1449 ResultType ret = 0;\
1450 DT_RETURN_MARK_FOR(Result, Call##Result##MethodV, ResultType, \
1451 (const ResultType&)ret);\
1452 \
1453 JavaValue jvalue(Tag); \
1454 JNI_ArgumentPusherVaArg ap(methodID, args); \
1455 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK_0); \
1456 ret = jvalue.get_##ResultType(); \
1457 return ret;\
1458 JNI_END
1459
1460 // the runtime type of subword integral basic types is integer
1461 DEFINE_CALLMETHODV(jboolean, Boolean, T_BOOLEAN
1462 , HOTSPOT_JNI_CALLBOOLEANMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1463 HOTSPOT_JNI_CALLBOOLEANMETHODV_RETURN(_ret_ref))
1464 DEFINE_CALLMETHODV(jbyte, Byte, T_BYTE
1465 , HOTSPOT_JNI_CALLBYTEMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1466 HOTSPOT_JNI_CALLBYTEMETHODV_RETURN(_ret_ref))
1467 DEFINE_CALLMETHODV(jchar, Char, T_CHAR
1468 , HOTSPOT_JNI_CALLCHARMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1469 HOTSPOT_JNI_CALLCHARMETHODV_RETURN(_ret_ref))
1470 DEFINE_CALLMETHODV(jshort, Short, T_SHORT
1471 , HOTSPOT_JNI_CALLSHORTMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1472 HOTSPOT_JNI_CALLSHORTMETHODV_RETURN(_ret_ref))
1473
1474 DEFINE_CALLMETHODV(jobject, Object, T_OBJECT
1475 , HOTSPOT_JNI_CALLOBJECTMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1476 HOTSPOT_JNI_CALLOBJECTMETHODV_RETURN(_ret_ref))
1477 DEFINE_CALLMETHODV(jint, Int, T_INT,
1478 HOTSPOT_JNI_CALLINTMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1479 HOTSPOT_JNI_CALLINTMETHODV_RETURN(_ret_ref))
1480 DEFINE_CALLMETHODV(jlong, Long, T_LONG
1481 , HOTSPOT_JNI_CALLLONGMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1482 HOTSPOT_JNI_CALLLONGMETHODV_RETURN(_ret_ref))
1483 // Float and double probes don't return value because dtrace doesn't currently support it
1484 DEFINE_CALLMETHODV(jfloat, Float, T_FLOAT
1485 , HOTSPOT_JNI_CALLFLOATMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1486 HOTSPOT_JNI_CALLFLOATMETHODV_RETURN())
1487 DEFINE_CALLMETHODV(jdouble, Double, T_DOUBLE
1488 , HOTSPOT_JNI_CALLDOUBLEMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1489 HOTSPOT_JNI_CALLDOUBLEMETHODV_RETURN())
1490
1491 #define DEFINE_CALLMETHODA(ResultType, Result, Tag \
1492 , EntryProbe, ReturnProbe) \
1493 \
1494 DT_RETURN_MARK_DECL_FOR(Result, Call##Result##MethodA, ResultType \
1495 , ReturnProbe); \
1496 \
1497 JNI_ENTRY(ResultType, \
1498 jni_Call##Result##MethodA(JNIEnv *env, jobject obj, jmethodID methodID, const jvalue *args)) \
1499 JNIWrapper("Call" XSTR(Result) "MethodA"); \
1500 EntryProbe; \
1501 ResultType ret = 0;\
1502 DT_RETURN_MARK_FOR(Result, Call##Result##MethodA, ResultType, \
1503 (const ResultType&)ret);\
1504 \
1505 JavaValue jvalue(Tag); \
1506 JNI_ArgumentPusherArray ap(methodID, args); \
1507 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK_0); \
1508 ret = jvalue.get_##ResultType(); \
1509 return ret;\
1510 JNI_END
1511
1512 // the runtime type of subword integral basic types is integer
1513 DEFINE_CALLMETHODA(jboolean, Boolean, T_BOOLEAN
1514 , HOTSPOT_JNI_CALLBOOLEANMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1515 HOTSPOT_JNI_CALLBOOLEANMETHODA_RETURN(_ret_ref))
1516 DEFINE_CALLMETHODA(jbyte, Byte, T_BYTE
1517 , HOTSPOT_JNI_CALLBYTEMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1518 HOTSPOT_JNI_CALLBYTEMETHODA_RETURN(_ret_ref))
1519 DEFINE_CALLMETHODA(jchar, Char, T_CHAR
1520 , HOTSPOT_JNI_CALLCHARMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1521 HOTSPOT_JNI_CALLCHARMETHODA_RETURN(_ret_ref))
1522 DEFINE_CALLMETHODA(jshort, Short, T_SHORT
1523 , HOTSPOT_JNI_CALLSHORTMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1524 HOTSPOT_JNI_CALLSHORTMETHODA_RETURN(_ret_ref))
1525
1526 DEFINE_CALLMETHODA(jobject, Object, T_OBJECT
1527 , HOTSPOT_JNI_CALLOBJECTMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1528 HOTSPOT_JNI_CALLOBJECTMETHODA_RETURN(_ret_ref))
1529 DEFINE_CALLMETHODA(jint, Int, T_INT,
1530 HOTSPOT_JNI_CALLINTMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1531 HOTSPOT_JNI_CALLINTMETHODA_RETURN(_ret_ref))
1532 DEFINE_CALLMETHODA(jlong, Long, T_LONG
1533 , HOTSPOT_JNI_CALLLONGMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1534 HOTSPOT_JNI_CALLLONGMETHODA_RETURN(_ret_ref))
1535 // Float and double probes don't return value because dtrace doesn't currently support it
1536 DEFINE_CALLMETHODA(jfloat, Float, T_FLOAT
1537 , HOTSPOT_JNI_CALLFLOATMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1538 HOTSPOT_JNI_CALLFLOATMETHODA_RETURN())
1539 DEFINE_CALLMETHODA(jdouble, Double, T_DOUBLE
1540 , HOTSPOT_JNI_CALLDOUBLEMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1541 HOTSPOT_JNI_CALLDOUBLEMETHODA_RETURN())
1542
1543 DT_VOID_RETURN_MARK_DECL(CallVoidMethod, HOTSPOT_JNI_CALLVOIDMETHOD_RETURN());
1544 DT_VOID_RETURN_MARK_DECL(CallVoidMethodV, HOTSPOT_JNI_CALLVOIDMETHODV_RETURN());
1545 DT_VOID_RETURN_MARK_DECL(CallVoidMethodA, HOTSPOT_JNI_CALLVOIDMETHODA_RETURN());
1546
1547
1548 JNI_ENTRY(void, jni_CallVoidMethod(JNIEnv *env, jobject obj, jmethodID methodID, ...))
1549 JNIWrapper("CallVoidMethod");
1550 HOTSPOT_JNI_CALLVOIDMETHOD_ENTRY(env, obj, (uintptr_t) methodID);
1551 DT_VOID_RETURN_MARK(CallVoidMethod);
1552
1553 va_list args;
1554 va_start(args, methodID);
1555 JavaValue jvalue(T_VOID);
1556 JNI_ArgumentPusherVaArg ap(methodID, args);
1557 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK);
1558 va_end(args);
1559 JNI_END
1560
1561
1562 JNI_ENTRY(void, jni_CallVoidMethodV(JNIEnv *env, jobject obj, jmethodID methodID, va_list args))
1563 JNIWrapper("CallVoidMethodV");
1564 HOTSPOT_JNI_CALLVOIDMETHODV_ENTRY(env, obj, (uintptr_t) methodID);
1565 DT_VOID_RETURN_MARK(CallVoidMethodV);
1566
1567 JavaValue jvalue(T_VOID);
1568 JNI_ArgumentPusherVaArg ap(methodID, args);
1569 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK);
1570 JNI_END
1571
1572
1573 JNI_ENTRY(void, jni_CallVoidMethodA(JNIEnv *env, jobject obj, jmethodID methodID, const jvalue *args))
1574 JNIWrapper("CallVoidMethodA");
1575 HOTSPOT_JNI_CALLVOIDMETHODA_ENTRY(env, obj, (uintptr_t) methodID);
1576 DT_VOID_RETURN_MARK(CallVoidMethodA);
1577
1578 JavaValue jvalue(T_VOID);
1579 JNI_ArgumentPusherArray ap(methodID, args);
1580 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK);
1581 JNI_END
1582
1583
1584
1585 #define DEFINE_CALLNONVIRTUALMETHOD(ResultType, Result, Tag \
1586 , EntryProbe, ReturnProbe) \
1587 \
1588 DT_RETURN_MARK_DECL_FOR(Result, CallNonvirtual##Result##Method, ResultType \
1589 , ReturnProbe);\
1590 \
1591 JNI_ENTRY(ResultType, \
1592 jni_CallNonvirtual##Result##Method(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, ...)) \
1593 JNIWrapper("CallNonvitual" XSTR(Result) "Method"); \
1594 \
1595 EntryProbe;\
1596 ResultType ret;\
1597 DT_RETURN_MARK_FOR(Result, CallNonvirtual##Result##Method, ResultType, \
1598 (const ResultType&)ret);\
1599 \
1600 va_list args; \
1601 va_start(args, methodID); \
1602 JavaValue jvalue(Tag); \
1603 JNI_ArgumentPusherVaArg ap(methodID, args); \
1604 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_0); \
1605 va_end(args); \
1606 ret = jvalue.get_##ResultType(); \
1607 return ret;\
1608 JNI_END
1609
1610 // the runtime type of subword integral basic types is integer
1611 DEFINE_CALLNONVIRTUALMETHOD(jboolean, Boolean, T_BOOLEAN
1612 , HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1613 HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHOD_RETURN(_ret_ref))
1614 DEFINE_CALLNONVIRTUALMETHOD(jbyte, Byte, T_BYTE
1615 , HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1616 HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHOD_RETURN(_ret_ref))
1617 DEFINE_CALLNONVIRTUALMETHOD(jchar, Char, T_CHAR
1618 , HOTSPOT_JNI_CALLNONVIRTUALCHARMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1619 HOTSPOT_JNI_CALLNONVIRTUALCHARMETHOD_RETURN(_ret_ref))
1620 DEFINE_CALLNONVIRTUALMETHOD(jshort, Short, T_SHORT
1621 , HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1622 HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHOD_RETURN(_ret_ref))
1623
1624 DEFINE_CALLNONVIRTUALMETHOD(jobject, Object, T_OBJECT
1625 , HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1626 HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHOD_RETURN(_ret_ref))
1627 DEFINE_CALLNONVIRTUALMETHOD(jint, Int, T_INT
1628 , HOTSPOT_JNI_CALLNONVIRTUALINTMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1629 HOTSPOT_JNI_CALLNONVIRTUALINTMETHOD_RETURN(_ret_ref))
1630 DEFINE_CALLNONVIRTUALMETHOD(jlong, Long, T_LONG
1631 , HOTSPOT_JNI_CALLNONVIRTUALLONGMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1632 // Float and double probes don't return value because dtrace doesn't currently support it
1633 HOTSPOT_JNI_CALLNONVIRTUALLONGMETHOD_RETURN(_ret_ref))
1634 DEFINE_CALLNONVIRTUALMETHOD(jfloat, Float, T_FLOAT
1635 , HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1636 HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHOD_RETURN())
1637 DEFINE_CALLNONVIRTUALMETHOD(jdouble, Double, T_DOUBLE
1638 , HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1639 HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHOD_RETURN())
1640
1641 #define DEFINE_CALLNONVIRTUALMETHODV(ResultType, Result, Tag \
1642 , EntryProbe, ReturnProbe) \
1643 \
1644 DT_RETURN_MARK_DECL_FOR(Result, CallNonvirtual##Result##MethodV, ResultType \
1645 , ReturnProbe);\
1646 \
1647 JNI_ENTRY(ResultType, \
1648 jni_CallNonvirtual##Result##MethodV(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, va_list args)) \
1649 JNIWrapper("CallNonvitual" XSTR(Result) "MethodV"); \
1650 \
1651 EntryProbe;\
1652 ResultType ret;\
1653 DT_RETURN_MARK_FOR(Result, CallNonvirtual##Result##MethodV, ResultType, \
1654 (const ResultType&)ret);\
1655 \
1656 JavaValue jvalue(Tag); \
1657 JNI_ArgumentPusherVaArg ap(methodID, args); \
1658 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_0); \
1659 ret = jvalue.get_##ResultType(); \
1660 return ret;\
1661 JNI_END
1662
1663 // the runtime type of subword integral basic types is integer
1664 DEFINE_CALLNONVIRTUALMETHODV(jboolean, Boolean, T_BOOLEAN
1665 , HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1666 HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHODV_RETURN(_ret_ref))
1667 DEFINE_CALLNONVIRTUALMETHODV(jbyte, Byte, T_BYTE
1668 , HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1669 HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHODV_RETURN(_ret_ref))
1670 DEFINE_CALLNONVIRTUALMETHODV(jchar, Char, T_CHAR
1671 , HOTSPOT_JNI_CALLNONVIRTUALCHARMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1672 HOTSPOT_JNI_CALLNONVIRTUALCHARMETHODV_RETURN(_ret_ref))
1673 DEFINE_CALLNONVIRTUALMETHODV(jshort, Short, T_SHORT
1674 , HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1675 HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHODV_RETURN(_ret_ref))
1676
1677 DEFINE_CALLNONVIRTUALMETHODV(jobject, Object, T_OBJECT
1678 , HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1679 HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHODV_RETURN(_ret_ref))
1680 DEFINE_CALLNONVIRTUALMETHODV(jint, Int, T_INT
1681 , HOTSPOT_JNI_CALLNONVIRTUALINTMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1682 HOTSPOT_JNI_CALLNONVIRTUALINTMETHODV_RETURN(_ret_ref))
1683 DEFINE_CALLNONVIRTUALMETHODV(jlong, Long, T_LONG
1684 , HOTSPOT_JNI_CALLNONVIRTUALLONGMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1685 // Float and double probes don't return value because dtrace doesn't currently support it
1686 HOTSPOT_JNI_CALLNONVIRTUALLONGMETHODV_RETURN(_ret_ref))
1687 DEFINE_CALLNONVIRTUALMETHODV(jfloat, Float, T_FLOAT
1688 , HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1689 HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHODV_RETURN())
1690 DEFINE_CALLNONVIRTUALMETHODV(jdouble, Double, T_DOUBLE
1691 , HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1692 HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHODV_RETURN())
1693
1694 #define DEFINE_CALLNONVIRTUALMETHODA(ResultType, Result, Tag \
1695 , EntryProbe, ReturnProbe) \
1696 \
1697 DT_RETURN_MARK_DECL_FOR(Result, CallNonvirtual##Result##MethodA, ResultType \
1698 , ReturnProbe);\
1699 \
1700 JNI_ENTRY(ResultType, \
1701 jni_CallNonvirtual##Result##MethodA(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, const jvalue *args)) \
1702 JNIWrapper("CallNonvitual" XSTR(Result) "MethodA"); \
1703 \
1704 EntryProbe;\
1705 ResultType ret;\
1706 DT_RETURN_MARK_FOR(Result, CallNonvirtual##Result##MethodA, ResultType, \
1707 (const ResultType&)ret);\
1708 \
1709 JavaValue jvalue(Tag); \
1710 JNI_ArgumentPusherArray ap(methodID, args); \
1711 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_0); \
1712 ret = jvalue.get_##ResultType(); \
1713 return ret;\
1714 JNI_END
1715
1716 // the runtime type of subword integral basic types is integer
1717 DEFINE_CALLNONVIRTUALMETHODA(jboolean, Boolean, T_BOOLEAN
1718 , HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1719 HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHODA_RETURN(_ret_ref))
1720 DEFINE_CALLNONVIRTUALMETHODA(jbyte, Byte, T_BYTE
1721 , HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1722 HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHODA_RETURN(_ret_ref))
1723 DEFINE_CALLNONVIRTUALMETHODA(jchar, Char, T_CHAR
1724 , HOTSPOT_JNI_CALLNONVIRTUALCHARMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1725 HOTSPOT_JNI_CALLNONVIRTUALCHARMETHODA_RETURN(_ret_ref))
1726 DEFINE_CALLNONVIRTUALMETHODA(jshort, Short, T_SHORT
1727 , HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1728 HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHODA_RETURN(_ret_ref))
1729
1730 DEFINE_CALLNONVIRTUALMETHODA(jobject, Object, T_OBJECT
1731 , HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1732 HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHODA_RETURN(_ret_ref))
1733 DEFINE_CALLNONVIRTUALMETHODA(jint, Int, T_INT
1734 , HOTSPOT_JNI_CALLNONVIRTUALINTMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1735 HOTSPOT_JNI_CALLNONVIRTUALINTMETHODA_RETURN(_ret_ref))
1736 DEFINE_CALLNONVIRTUALMETHODA(jlong, Long, T_LONG
1737 , HOTSPOT_JNI_CALLNONVIRTUALLONGMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1738 // Float and double probes don't return value because dtrace doesn't currently support it
1739 HOTSPOT_JNI_CALLNONVIRTUALLONGMETHODA_RETURN(_ret_ref))
1740 DEFINE_CALLNONVIRTUALMETHODA(jfloat, Float, T_FLOAT
1741 , HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1742 HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHODA_RETURN())
1743 DEFINE_CALLNONVIRTUALMETHODA(jdouble, Double, T_DOUBLE
1744 , HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1745 HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHODA_RETURN())
1746
1747 DT_VOID_RETURN_MARK_DECL(CallNonvirtualVoidMethod
1748 , HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHOD_RETURN());
1749 DT_VOID_RETURN_MARK_DECL(CallNonvirtualVoidMethodV
1750 , HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHODV_RETURN());
1751 DT_VOID_RETURN_MARK_DECL(CallNonvirtualVoidMethodA
1752 , HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHODA_RETURN());
1753
1754 JNI_ENTRY(void, jni_CallNonvirtualVoidMethod(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, ...))
1755 JNIWrapper("CallNonvirtualVoidMethod");
1756
1757 HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHOD_ENTRY(env, obj, cls, (uintptr_t) methodID);
1758 DT_VOID_RETURN_MARK(CallNonvirtualVoidMethod);
1759
1760 va_list args;
1761 va_start(args, methodID);
1762 JavaValue jvalue(T_VOID);
1763 JNI_ArgumentPusherVaArg ap(methodID, args);
1764 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK);
1765 va_end(args);
1766 JNI_END
1767
1768
1769 JNI_ENTRY(void, jni_CallNonvirtualVoidMethodV(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, va_list args))
1770 JNIWrapper("CallNonvirtualVoidMethodV");
1771
1772 HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHODV_ENTRY(
1773 env, obj, cls, (uintptr_t) methodID);
1774 DT_VOID_RETURN_MARK(CallNonvirtualVoidMethodV);
1775
1776 JavaValue jvalue(T_VOID);
1777 JNI_ArgumentPusherVaArg ap(methodID, args);
1778 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK);
1779 JNI_END
1780
1781
1782 JNI_ENTRY(void, jni_CallNonvirtualVoidMethodA(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, const jvalue *args))
1783 JNIWrapper("CallNonvirtualVoidMethodA");
1784 HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHODA_ENTRY(
1785 env, obj, cls, (uintptr_t) methodID);
1786 DT_VOID_RETURN_MARK(CallNonvirtualVoidMethodA);
1787 JavaValue jvalue(T_VOID);
1788 JNI_ArgumentPusherArray ap(methodID, args);
1789 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK);
1790 JNI_END
1791
1792
1793
1794 #define DEFINE_CALLSTATICMETHOD(ResultType, Result, Tag \
1795 , EntryProbe, ResultProbe) \
1796 \
1797 DT_RETURN_MARK_DECL_FOR(Result, CallStatic##Result##Method, ResultType \
1798 , ResultProbe); \
1799 \
1800 JNI_ENTRY(ResultType, \
1801 jni_CallStatic##Result##Method(JNIEnv *env, jclass cls, jmethodID methodID, ...)) \
1802 JNIWrapper("CallStatic" XSTR(Result) "Method"); \
1803 \
1804 EntryProbe; \
1805 ResultType ret = 0;\
1806 DT_RETURN_MARK_FOR(Result, CallStatic##Result##Method, ResultType, \
1807 (const ResultType&)ret);\
1808 \
1809 va_list args; \
1810 va_start(args, methodID); \
1811 JavaValue jvalue(Tag); \
1812 JNI_ArgumentPusherVaArg ap(methodID, args); \
1813 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK_0); \
1814 va_end(args); \
1815 ret = jvalue.get_##ResultType(); \
1816 return ret;\
1817 JNI_END
1818
1819 // the runtime type of subword integral basic types is integer
1820 DEFINE_CALLSTATICMETHOD(jboolean, Boolean, T_BOOLEAN
1821 , HOTSPOT_JNI_CALLSTATICBOOLEANMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1822 HOTSPOT_JNI_CALLSTATICBOOLEANMETHOD_RETURN(_ret_ref));
1823 DEFINE_CALLSTATICMETHOD(jbyte, Byte, T_BYTE
1824 , HOTSPOT_JNI_CALLSTATICBYTEMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1825 HOTSPOT_JNI_CALLSTATICBYTEMETHOD_RETURN(_ret_ref));
1826 DEFINE_CALLSTATICMETHOD(jchar, Char, T_CHAR
1827 , HOTSPOT_JNI_CALLSTATICCHARMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1828 HOTSPOT_JNI_CALLSTATICCHARMETHOD_RETURN(_ret_ref));
1829 DEFINE_CALLSTATICMETHOD(jshort, Short, T_SHORT
1830 , HOTSPOT_JNI_CALLSTATICSHORTMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1831 HOTSPOT_JNI_CALLSTATICSHORTMETHOD_RETURN(_ret_ref));
1832
1833 DEFINE_CALLSTATICMETHOD(jobject, Object, T_OBJECT
1834 , HOTSPOT_JNI_CALLSTATICOBJECTMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1835 HOTSPOT_JNI_CALLSTATICOBJECTMETHOD_RETURN(_ret_ref));
1836 DEFINE_CALLSTATICMETHOD(jint, Int, T_INT
1837 , HOTSPOT_JNI_CALLSTATICINTMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1838 HOTSPOT_JNI_CALLSTATICINTMETHOD_RETURN(_ret_ref));
1839 DEFINE_CALLSTATICMETHOD(jlong, Long, T_LONG
1840 , HOTSPOT_JNI_CALLSTATICLONGMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1841 HOTSPOT_JNI_CALLSTATICLONGMETHOD_RETURN(_ret_ref));
1842 // Float and double probes don't return value because dtrace doesn't currently support it
1843 DEFINE_CALLSTATICMETHOD(jfloat, Float, T_FLOAT
1844 , HOTSPOT_JNI_CALLSTATICFLOATMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1845 HOTSPOT_JNI_CALLSTATICFLOATMETHOD_RETURN());
1846 DEFINE_CALLSTATICMETHOD(jdouble, Double, T_DOUBLE
1847 , HOTSPOT_JNI_CALLSTATICDOUBLEMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1848 HOTSPOT_JNI_CALLSTATICDOUBLEMETHOD_RETURN());
1849
1850 #define DEFINE_CALLSTATICMETHODV(ResultType, Result, Tag \
1851 , EntryProbe, ResultProbe) \
1852 \
1853 DT_RETURN_MARK_DECL_FOR(Result, CallStatic##Result##MethodV, ResultType \
1854 , ResultProbe); \
1855 \
1856 JNI_ENTRY(ResultType, \
1857 jni_CallStatic##Result##MethodV(JNIEnv *env, jclass cls, jmethodID methodID, va_list args)) \
1858 JNIWrapper("CallStatic" XSTR(Result) "MethodV"); \
1859 \
1860 EntryProbe; \
1861 ResultType ret = 0;\
1862 DT_RETURN_MARK_FOR(Result, CallStatic##Result##MethodV, ResultType, \
1863 (const ResultType&)ret);\
1864 \
1865 JavaValue jvalue(Tag); \
1866 JNI_ArgumentPusherVaArg ap(methodID, args); \
1867 /* Make sure class is initialized before trying to invoke its method */ \
1868 KlassHandle k(THREAD, java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls))); \
1869 k()->initialize(CHECK_0); \
1870 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK_0); \
1871 va_end(args); \
1872 ret = jvalue.get_##ResultType(); \
1873 return ret;\
1874 JNI_END
1875
1876 // the runtime type of subword integral basic types is integer
1877 DEFINE_CALLSTATICMETHODV(jboolean, Boolean, T_BOOLEAN
1878 , HOTSPOT_JNI_CALLSTATICBOOLEANMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1879 HOTSPOT_JNI_CALLSTATICBOOLEANMETHODV_RETURN(_ret_ref));
1880 DEFINE_CALLSTATICMETHODV(jbyte, Byte, T_BYTE
1881 , HOTSPOT_JNI_CALLSTATICBYTEMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1882 HOTSPOT_JNI_CALLSTATICBYTEMETHODV_RETURN(_ret_ref));
1883 DEFINE_CALLSTATICMETHODV(jchar, Char, T_CHAR
1884 , HOTSPOT_JNI_CALLSTATICCHARMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1885 HOTSPOT_JNI_CALLSTATICCHARMETHODV_RETURN(_ret_ref));
1886 DEFINE_CALLSTATICMETHODV(jshort, Short, T_SHORT
1887 , HOTSPOT_JNI_CALLSTATICSHORTMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1888 HOTSPOT_JNI_CALLSTATICSHORTMETHODV_RETURN(_ret_ref));
1889
1890 DEFINE_CALLSTATICMETHODV(jobject, Object, T_OBJECT
1891 , HOTSPOT_JNI_CALLSTATICOBJECTMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1892 HOTSPOT_JNI_CALLSTATICOBJECTMETHODV_RETURN(_ret_ref));
1893 DEFINE_CALLSTATICMETHODV(jint, Int, T_INT
1894 , HOTSPOT_JNI_CALLSTATICINTMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1895 HOTSPOT_JNI_CALLSTATICINTMETHODV_RETURN(_ret_ref));
1896 DEFINE_CALLSTATICMETHODV(jlong, Long, T_LONG
1897 , HOTSPOT_JNI_CALLSTATICLONGMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1898 HOTSPOT_JNI_CALLSTATICLONGMETHODV_RETURN(_ret_ref));
1899 // Float and double probes don't return value because dtrace doesn't currently support it
1900 DEFINE_CALLSTATICMETHODV(jfloat, Float, T_FLOAT
1901 , HOTSPOT_JNI_CALLSTATICFLOATMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1902 HOTSPOT_JNI_CALLSTATICFLOATMETHODV_RETURN());
1903 DEFINE_CALLSTATICMETHODV(jdouble, Double, T_DOUBLE
1904 , HOTSPOT_JNI_CALLSTATICDOUBLEMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1905 HOTSPOT_JNI_CALLSTATICDOUBLEMETHODV_RETURN());
1906
1907 #define DEFINE_CALLSTATICMETHODA(ResultType, Result, Tag \
1908 , EntryProbe, ResultProbe) \
1909 \
1910 DT_RETURN_MARK_DECL_FOR(Result, CallStatic##Result##MethodA, ResultType \
1911 , ResultProbe); \
1912 \
1913 JNI_ENTRY(ResultType, \
1914 jni_CallStatic##Result##MethodA(JNIEnv *env, jclass cls, jmethodID methodID, const jvalue *args)) \
1915 JNIWrapper("CallStatic" XSTR(Result) "MethodA"); \
1916 \
1917 EntryProbe; \
1918 ResultType ret = 0;\
1919 DT_RETURN_MARK_FOR(Result, CallStatic##Result##MethodA, ResultType, \
1920 (const ResultType&)ret);\
1921 \
1922 JavaValue jvalue(Tag); \
1923 JNI_ArgumentPusherArray ap(methodID, args); \
1924 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK_0); \
1925 ret = jvalue.get_##ResultType(); \
1926 return ret;\
1927 JNI_END
1928
1929 // the runtime type of subword integral basic types is integer
1930 DEFINE_CALLSTATICMETHODA(jboolean, Boolean, T_BOOLEAN
1931 , HOTSPOT_JNI_CALLSTATICBOOLEANMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1932 HOTSPOT_JNI_CALLSTATICBOOLEANMETHODA_RETURN(_ret_ref));
1933 DEFINE_CALLSTATICMETHODA(jbyte, Byte, T_BYTE
1934 , HOTSPOT_JNI_CALLSTATICBYTEMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1935 HOTSPOT_JNI_CALLSTATICBYTEMETHODA_RETURN(_ret_ref));
1936 DEFINE_CALLSTATICMETHODA(jchar, Char, T_CHAR
1937 , HOTSPOT_JNI_CALLSTATICCHARMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1938 HOTSPOT_JNI_CALLSTATICCHARMETHODA_RETURN(_ret_ref));
1939 DEFINE_CALLSTATICMETHODA(jshort, Short, T_SHORT
1940 , HOTSPOT_JNI_CALLSTATICSHORTMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1941 HOTSPOT_JNI_CALLSTATICSHORTMETHODA_RETURN(_ret_ref));
1942
1943 DEFINE_CALLSTATICMETHODA(jobject, Object, T_OBJECT
1944 , HOTSPOT_JNI_CALLSTATICOBJECTMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1945 HOTSPOT_JNI_CALLSTATICOBJECTMETHODA_RETURN(_ret_ref));
1946 DEFINE_CALLSTATICMETHODA(jint, Int, T_INT
1947 , HOTSPOT_JNI_CALLSTATICINTMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1948 HOTSPOT_JNI_CALLSTATICINTMETHODA_RETURN(_ret_ref));
1949 DEFINE_CALLSTATICMETHODA(jlong, Long, T_LONG
1950 , HOTSPOT_JNI_CALLSTATICLONGMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1951 HOTSPOT_JNI_CALLSTATICLONGMETHODA_RETURN(_ret_ref));
1952 // Float and double probes don't return value because dtrace doesn't currently support it
1953 DEFINE_CALLSTATICMETHODA(jfloat, Float, T_FLOAT
1954 , HOTSPOT_JNI_CALLSTATICFLOATMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1955 HOTSPOT_JNI_CALLSTATICFLOATMETHODA_RETURN());
1956 DEFINE_CALLSTATICMETHODA(jdouble, Double, T_DOUBLE
1957 , HOTSPOT_JNI_CALLSTATICDOUBLEMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1958 HOTSPOT_JNI_CALLSTATICDOUBLEMETHODA_RETURN());
1959
1960 DT_VOID_RETURN_MARK_DECL(CallStaticVoidMethod
1961 , HOTSPOT_JNI_CALLSTATICVOIDMETHOD_RETURN());
1962 DT_VOID_RETURN_MARK_DECL(CallStaticVoidMethodV
1963 , HOTSPOT_JNI_CALLSTATICVOIDMETHODV_RETURN());
1964 DT_VOID_RETURN_MARK_DECL(CallStaticVoidMethodA
1965 , HOTSPOT_JNI_CALLSTATICVOIDMETHODA_RETURN());
1966
1967 JNI_ENTRY(void, jni_CallStaticVoidMethod(JNIEnv *env, jclass cls, jmethodID methodID, ...))
1968 JNIWrapper("CallStaticVoidMethod");
1969 HOTSPOT_JNI_CALLSTATICVOIDMETHOD_ENTRY(env, cls, (uintptr_t) methodID);
1970 DT_VOID_RETURN_MARK(CallStaticVoidMethod);
1971
1972 va_list args;
1973 va_start(args, methodID);
1974 JavaValue jvalue(T_VOID);
1975 JNI_ArgumentPusherVaArg ap(methodID, args);
1976 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK);
1977 va_end(args);
1978 JNI_END
1979
1980
1981 JNI_ENTRY(void, jni_CallStaticVoidMethodV(JNIEnv *env, jclass cls, jmethodID methodID, va_list args))
1982 JNIWrapper("CallStaticVoidMethodV");
1983 HOTSPOT_JNI_CALLSTATICVOIDMETHODV_ENTRY(env, cls, (uintptr_t) methodID);
1984 DT_VOID_RETURN_MARK(CallStaticVoidMethodV);
1985
1986 JavaValue jvalue(T_VOID);
1987 JNI_ArgumentPusherVaArg ap(methodID, args);
1988 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK);
1989 JNI_END
1990
1991
1992 JNI_ENTRY(void, jni_CallStaticVoidMethodA(JNIEnv *env, jclass cls, jmethodID methodID, const jvalue *args))
1993 JNIWrapper("CallStaticVoidMethodA");
1994 HOTSPOT_JNI_CALLSTATICVOIDMETHODA_ENTRY(env, cls, (uintptr_t) methodID);
1995 DT_VOID_RETURN_MARK(CallStaticVoidMethodA);
1996
1997 JavaValue jvalue(T_VOID);
1998 JNI_ArgumentPusherArray ap(methodID, args);
1999 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK);
2000 JNI_END
2001
2002
2003 //
2004 // Accessing Fields
2005 //
2006
2007
2008 DT_RETURN_MARK_DECL(GetFieldID, jfieldID
2009 , HOTSPOT_JNI_GETFIELDID_RETURN((uintptr_t)_ret_ref));
2010
2011 JNI_ENTRY(jfieldID, jni_GetFieldID(JNIEnv *env, jclass clazz,
2012 const char *name, const char *sig))
2013 JNIWrapper("GetFieldID");
2014 HOTSPOT_JNI_GETFIELDID_ENTRY(env, clazz, (char *) name, (char *) sig);
2015 jfieldID ret = 0;
2016 DT_RETURN_MARK(GetFieldID, jfieldID, (const jfieldID&)ret);
2017
2018 // The class should have been loaded (we have an instance of the class
2019 // passed in) so the field and signature should already be in the symbol
2020 // table. If they're not there, the field doesn't exist.
2021 TempNewSymbol fieldname = SymbolTable::probe(name, (int)strlen(name));
2022 TempNewSymbol signame = SymbolTable::probe(sig, (int)strlen(sig));
2023 if (fieldname == NULL || signame == NULL) {
2024 THROW_MSG_0(vmSymbols::java_lang_NoSuchFieldError(), (char*) name);
2025 }
2026 KlassHandle k(THREAD,
2027 java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz)));
2028 // Make sure class is initialized before handing id's out to fields
2029 k()->initialize(CHECK_NULL);
2030
2031 fieldDescriptor fd;
2032 if (!k()->is_instance_klass() ||
2033 !InstanceKlass::cast(k())->find_field(fieldname, signame, false, &fd)) {
2034 THROW_MSG_0(vmSymbols::java_lang_NoSuchFieldError(), (char*) name);
2035 }
2036
2037 // A jfieldID for a non-static field is simply the offset of the field within the instanceOop
2038 // It may also have hash bits for k, if VerifyJNIFields is turned on.
2039 ret = jfieldIDWorkaround::to_instance_jfieldID(k(), fd.offset());
2040 return ret;
2041 JNI_END
2042
2043
2044 JNI_ENTRY(jobject, jni_GetObjectField(JNIEnv *env, jobject obj, jfieldID fieldID))
2045 JNIWrapper("GetObjectField");
2046 HOTSPOT_JNI_GETOBJECTFIELD_ENTRY(env, obj, (uintptr_t) fieldID);
2047 oop o = JNIHandles::resolve_non_null(obj);
2048 Klass* k = o->klass();
2049 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID);
2050 // Keep JVMTI addition small and only check enabled flag here.
2051 // jni_GetField_probe() assumes that is okay to create handles.
2052 if (JvmtiExport::should_post_field_access()) {
2053 o = JvmtiExport::jni_GetField_probe(thread, obj, o, k, fieldID, false);
2054 }
2055 jobject ret = JNIHandles::make_local(env, o->obj_field(offset));
2056 #if INCLUDE_ALL_GCS
2057 // If G1 is enabled and we are accessing the value of the referent
2058 // field in a reference object then we need to register a non-null
2059 // referent with the SATB barrier.
2060 if (UseG1GC) {
2061 bool needs_barrier = false;
2062
2063 if (ret != NULL &&
2064 offset == java_lang_ref_Reference::referent_offset &&
2065 InstanceKlass::cast(k)->reference_type() != REF_NONE) {
2066 assert(InstanceKlass::cast(k)->is_subclass_of(SystemDictionary::Reference_klass()), "sanity");
2067 needs_barrier = true;
2068 }
2069
2070 if (needs_barrier) {
2071 oop referent = JNIHandles::resolve(ret);
2072 G1SATBCardTableModRefBS::enqueue(referent);
2073 }
2074 }
2075 #endif // INCLUDE_ALL_GCS
2076 HOTSPOT_JNI_GETOBJECTFIELD_RETURN(ret);
2077 return ret;
2078 JNI_END
2079
2080
2081
2082 #define DEFINE_GETFIELD(Return,Fieldname,Result \
2083 , EntryProbe, ReturnProbe) \
2084 \
2085 DT_RETURN_MARK_DECL_FOR(Result, Get##Result##Field, Return \
2086 , ReturnProbe); \
2087 \
2088 JNI_QUICK_ENTRY(Return, jni_Get##Result##Field(JNIEnv *env, jobject obj, jfieldID fieldID)) \
2089 JNIWrapper("Get" XSTR(Result) "Field"); \
2090 \
2091 EntryProbe; \
2092 Return ret = 0;\
2093 DT_RETURN_MARK_FOR(Result, Get##Result##Field, Return, (const Return&)ret);\
2094 \
2095 oop o = JNIHandles::resolve_non_null(obj); \
2096 Klass* k = o->klass(); \
2097 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID); \
2098 /* Keep JVMTI addition small and only check enabled flag here. */ \
2099 /* jni_GetField_probe_nh() assumes that is not okay to create handles */ \
2100 /* and creates a ResetNoHandleMark. */ \
2101 if (JvmtiExport::should_post_field_access()) { \
2102 o = JvmtiExport::jni_GetField_probe_nh(thread, obj, o, k, fieldID, false); \
2103 } \
2104 ret = o->Fieldname##_field(offset); \
2105 return ret; \
2106 JNI_END
2107
2108 DEFINE_GETFIELD(jboolean, bool, Boolean
2109 , HOTSPOT_JNI_GETBOOLEANFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2110 HOTSPOT_JNI_GETBOOLEANFIELD_RETURN(_ret_ref))
2111 DEFINE_GETFIELD(jbyte, byte, Byte
2112 , HOTSPOT_JNI_GETBYTEFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2113 HOTSPOT_JNI_GETBYTEFIELD_RETURN(_ret_ref))
2114 DEFINE_GETFIELD(jchar, char, Char
2115 , HOTSPOT_JNI_GETCHARFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2116 HOTSPOT_JNI_GETCHARFIELD_RETURN(_ret_ref))
2117 DEFINE_GETFIELD(jshort, short, Short
2118 , HOTSPOT_JNI_GETSHORTFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2119 HOTSPOT_JNI_GETSHORTFIELD_RETURN(_ret_ref))
2120 DEFINE_GETFIELD(jint, int, Int
2121 , HOTSPOT_JNI_GETINTFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2122 HOTSPOT_JNI_GETINTFIELD_RETURN(_ret_ref))
2123 DEFINE_GETFIELD(jlong, long, Long
2124 , HOTSPOT_JNI_GETLONGFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2125 HOTSPOT_JNI_GETLONGFIELD_RETURN(_ret_ref))
2126 // Float and double probes don't return value because dtrace doesn't currently support it
2127 DEFINE_GETFIELD(jfloat, float, Float
2128 , HOTSPOT_JNI_GETFLOATFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2129 HOTSPOT_JNI_GETFLOATFIELD_RETURN())
2130 DEFINE_GETFIELD(jdouble, double, Double
2131 , HOTSPOT_JNI_GETDOUBLEFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2132 HOTSPOT_JNI_GETDOUBLEFIELD_RETURN())
2133
2134 address jni_GetBooleanField_addr() {
2135 return (address)jni_GetBooleanField;
2136 }
2137 address jni_GetByteField_addr() {
2138 return (address)jni_GetByteField;
2139 }
2140 address jni_GetCharField_addr() {
2141 return (address)jni_GetCharField;
2142 }
2143 address jni_GetShortField_addr() {
2144 return (address)jni_GetShortField;
2145 }
2146 address jni_GetIntField_addr() {
2147 return (address)jni_GetIntField;
2148 }
2149 address jni_GetLongField_addr() {
2150 return (address)jni_GetLongField;
2151 }
2152 address jni_GetFloatField_addr() {
2153 return (address)jni_GetFloatField;
2154 }
2155 address jni_GetDoubleField_addr() {
2156 return (address)jni_GetDoubleField;
2157 }
2158
2159 JNI_QUICK_ENTRY(void, jni_SetObjectField(JNIEnv *env, jobject obj, jfieldID fieldID, jobject value))
2160 JNIWrapper("SetObjectField");
2161 HOTSPOT_JNI_SETOBJECTFIELD_ENTRY(env, obj, (uintptr_t) fieldID, value);
2162 oop o = JNIHandles::resolve_non_null(obj);
2163 Klass* k = o->klass();
2164 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID);
2165 // Keep JVMTI addition small and only check enabled flag here.
2166 // jni_SetField_probe_nh() assumes that is not okay to create handles
2167 // and creates a ResetNoHandleMark.
2168 if (JvmtiExport::should_post_field_modification()) {
2169 jvalue field_value;
2170 field_value.l = value;
2171 o = JvmtiExport::jni_SetField_probe_nh(thread, obj, o, k, fieldID, false, 'L', (jvalue *)&field_value);
2172 }
2173 o->obj_field_put(offset, JNIHandles::resolve(value));
2174 HOTSPOT_JNI_SETOBJECTFIELD_RETURN();
2175 JNI_END
2176
2177
2178 #define DEFINE_SETFIELD(Argument,Fieldname,Result,SigType,unionType \
2179 , EntryProbe, ReturnProbe) \
2180 \
2181 JNI_QUICK_ENTRY(void, jni_Set##Result##Field(JNIEnv *env, jobject obj, jfieldID fieldID, Argument value)) \
2182 JNIWrapper("Set" XSTR(Result) "Field"); \
2183 \
2184 EntryProbe; \
2185 \
2186 oop o = JNIHandles::resolve_non_null(obj); \
2187 Klass* k = o->klass(); \
2188 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID); \
2189 /* Keep JVMTI addition small and only check enabled flag here. */ \
2190 /* jni_SetField_probe_nh() assumes that is not okay to create handles */ \
2191 /* and creates a ResetNoHandleMark. */ \
2192 if (JvmtiExport::should_post_field_modification()) { \
2193 jvalue field_value; \
2194 field_value.unionType = value; \
2195 o = JvmtiExport::jni_SetField_probe_nh(thread, obj, o, k, fieldID, false, SigType, (jvalue *)&field_value); \
2196 } \
2197 o->Fieldname##_field_put(offset, value); \
2198 ReturnProbe; \
2199 JNI_END
2200
2201 DEFINE_SETFIELD(jboolean, bool, Boolean, 'Z', z
2202 , HOTSPOT_JNI_SETBOOLEANFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value),
2203 HOTSPOT_JNI_SETBOOLEANFIELD_RETURN())
2204 DEFINE_SETFIELD(jbyte, byte, Byte, 'B', b
2205 , HOTSPOT_JNI_SETBYTEFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value),
2206 HOTSPOT_JNI_SETBYTEFIELD_RETURN())
2207 DEFINE_SETFIELD(jchar, char, Char, 'C', c
2208 , HOTSPOT_JNI_SETCHARFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value),
2209 HOTSPOT_JNI_SETCHARFIELD_RETURN())
2210 DEFINE_SETFIELD(jshort, short, Short, 'S', s
2211 , HOTSPOT_JNI_SETSHORTFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value),
2212 HOTSPOT_JNI_SETSHORTFIELD_RETURN())
2213 DEFINE_SETFIELD(jint, int, Int, 'I', i
2214 , HOTSPOT_JNI_SETINTFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value),
2215 HOTSPOT_JNI_SETINTFIELD_RETURN())
2216 DEFINE_SETFIELD(jlong, long, Long, 'J', j
2217 , HOTSPOT_JNI_SETLONGFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value),
2218 HOTSPOT_JNI_SETLONGFIELD_RETURN())
2219 // Float and double probes don't return value because dtrace doesn't currently support it
2220 DEFINE_SETFIELD(jfloat, float, Float, 'F', f
2221 , HOTSPOT_JNI_SETFLOATFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2222 HOTSPOT_JNI_SETFLOATFIELD_RETURN())
2223 DEFINE_SETFIELD(jdouble, double, Double, 'D', d
2224 , HOTSPOT_JNI_SETDOUBLEFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2225 HOTSPOT_JNI_SETDOUBLEFIELD_RETURN())
2226
2227 DT_RETURN_MARK_DECL(ToReflectedField, jobject
2228 , HOTSPOT_JNI_TOREFLECTEDFIELD_RETURN(_ret_ref));
2229
2230 JNI_ENTRY(jobject, jni_ToReflectedField(JNIEnv *env, jclass cls, jfieldID fieldID, jboolean isStatic))
2231 JNIWrapper("ToReflectedField");
2232 HOTSPOT_JNI_TOREFLECTEDFIELD_ENTRY(env, cls, (uintptr_t) fieldID, isStatic);
2233 jobject ret = NULL;
2234 DT_RETURN_MARK(ToReflectedField, jobject, (const jobject&)ret);
2235
2236 fieldDescriptor fd;
2237 bool found = false;
2238 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2239
2240 assert(jfieldIDWorkaround::is_static_jfieldID(fieldID) == (isStatic != 0), "invalid fieldID");
2241
2242 if (isStatic) {
2243 // Static field. The fieldID a JNIid specifying the field holder and the offset within the Klass*.
2244 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID);
2245 assert(id->is_static_field_id(), "invalid static field id");
2246 found = id->find_local_field(&fd);
2247 } else {
2248 // Non-static field. The fieldID is really the offset of the field within the instanceOop.
2249 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID);
2250 found = InstanceKlass::cast(k)->find_field_from_offset(offset, false, &fd);
2251 }
2252 assert(found, "bad fieldID passed into jni_ToReflectedField");
2253 oop reflected = Reflection::new_field(&fd, CHECK_NULL);
2254 ret = JNIHandles::make_local(env, reflected);
2255 return ret;
2256 JNI_END
2257
2258
2259 //
2260 // Accessing Static Fields
2261 //
2262 DT_RETURN_MARK_DECL(GetStaticFieldID, jfieldID
2263 , HOTSPOT_JNI_GETSTATICFIELDID_RETURN((uintptr_t)_ret_ref));
2264
2265 JNI_ENTRY(jfieldID, jni_GetStaticFieldID(JNIEnv *env, jclass clazz,
2266 const char *name, const char *sig))
2267 JNIWrapper("GetStaticFieldID");
2268 HOTSPOT_JNI_GETSTATICFIELDID_ENTRY(env, clazz, (char *) name, (char *) sig);
2269 jfieldID ret = NULL;
2270 DT_RETURN_MARK(GetStaticFieldID, jfieldID, (const jfieldID&)ret);
2271
2272 // The class should have been loaded (we have an instance of the class
2273 // passed in) so the field and signature should already be in the symbol
2274 // table. If they're not there, the field doesn't exist.
2275 TempNewSymbol fieldname = SymbolTable::probe(name, (int)strlen(name));
2276 TempNewSymbol signame = SymbolTable::probe(sig, (int)strlen(sig));
2277 if (fieldname == NULL || signame == NULL) {
2278 THROW_MSG_0(vmSymbols::java_lang_NoSuchFieldError(), (char*) name);
2279 }
2280 KlassHandle k(THREAD,
2281 java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz)));
2282 // Make sure class is initialized before handing id's out to static fields
2283 k()->initialize(CHECK_NULL);
2284
2285 fieldDescriptor fd;
2286 if (!k()->is_instance_klass() ||
2287 !InstanceKlass::cast(k())->find_field(fieldname, signame, true, &fd)) {
2288 THROW_MSG_0(vmSymbols::java_lang_NoSuchFieldError(), (char*) name);
2289 }
2290
2291 // A jfieldID for a static field is a JNIid specifying the field holder and the offset within the Klass*
2292 JNIid* id = fd.field_holder()->jni_id_for(fd.offset());
2293 debug_only(id->set_is_static_field_id();)
2294
2295 debug_only(id->verify(fd.field_holder()));
2296
2297 ret = jfieldIDWorkaround::to_static_jfieldID(id);
2298 return ret;
2299 JNI_END
2300
2301
2302 JNI_ENTRY(jobject, jni_GetStaticObjectField(JNIEnv *env, jclass clazz, jfieldID fieldID))
2303 JNIWrapper("GetStaticObjectField");
2304 HOTSPOT_JNI_GETSTATICOBJECTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID);
2305 #if INCLUDE_JNI_CHECK
2306 DEBUG_ONLY(Klass* param_k = jniCheck::validate_class(thread, clazz);)
2307 #endif // INCLUDE_JNI_CHECK
2308 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID);
2309 assert(id->is_static_field_id(), "invalid static field id");
2310 // Keep JVMTI addition small and only check enabled flag here.
2311 // jni_GetField_probe() assumes that is okay to create handles.
2312 if (JvmtiExport::should_post_field_access()) {
2313 JvmtiExport::jni_GetField_probe(thread, NULL, NULL, id->holder(), fieldID, true);
2314 }
2315 jobject ret = JNIHandles::make_local(id->holder()->java_mirror()->obj_field(id->offset()));
2316 HOTSPOT_JNI_GETSTATICOBJECTFIELD_RETURN(ret);
2317 return ret;
2318 JNI_END
2319
2320
2321 #define DEFINE_GETSTATICFIELD(Return,Fieldname,Result \
2322 , EntryProbe, ReturnProbe) \
2323 \
2324 DT_RETURN_MARK_DECL_FOR(Result, GetStatic##Result##Field, Return \
2325 , ReturnProbe); \
2326 \
2327 JNI_ENTRY(Return, jni_GetStatic##Result##Field(JNIEnv *env, jclass clazz, jfieldID fieldID)) \
2328 JNIWrapper("GetStatic" XSTR(Result) "Field"); \
2329 EntryProbe; \
2330 Return ret = 0;\
2331 DT_RETURN_MARK_FOR(Result, GetStatic##Result##Field, Return, \
2332 (const Return&)ret);\
2333 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID); \
2334 assert(id->is_static_field_id(), "invalid static field id"); \
2335 /* Keep JVMTI addition small and only check enabled flag here. */ \
2336 /* jni_GetField_probe() assumes that is okay to create handles. */ \
2337 if (JvmtiExport::should_post_field_access()) { \
2338 JvmtiExport::jni_GetField_probe(thread, NULL, NULL, id->holder(), fieldID, true); \
2339 } \
2340 ret = id->holder()->java_mirror()-> Fieldname##_field (id->offset()); \
2341 return ret;\
2342 JNI_END
2343
2344 DEFINE_GETSTATICFIELD(jboolean, bool, Boolean
2345 , HOTSPOT_JNI_GETSTATICBOOLEANFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICBOOLEANFIELD_RETURN(_ret_ref))
2346 DEFINE_GETSTATICFIELD(jbyte, byte, Byte
2347 , HOTSPOT_JNI_GETSTATICBYTEFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICBYTEFIELD_RETURN(_ret_ref) )
2348 DEFINE_GETSTATICFIELD(jchar, char, Char
2349 , HOTSPOT_JNI_GETSTATICCHARFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICCHARFIELD_RETURN(_ret_ref) )
2350 DEFINE_GETSTATICFIELD(jshort, short, Short
2351 , HOTSPOT_JNI_GETSTATICSHORTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICSHORTFIELD_RETURN(_ret_ref) )
2352 DEFINE_GETSTATICFIELD(jint, int, Int
2353 , HOTSPOT_JNI_GETSTATICINTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICINTFIELD_RETURN(_ret_ref) )
2354 DEFINE_GETSTATICFIELD(jlong, long, Long
2355 , HOTSPOT_JNI_GETSTATICLONGFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICLONGFIELD_RETURN(_ret_ref) )
2356 // Float and double probes don't return value because dtrace doesn't currently support it
2357 DEFINE_GETSTATICFIELD(jfloat, float, Float
2358 , HOTSPOT_JNI_GETSTATICFLOATFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICFLOATFIELD_RETURN() )
2359 DEFINE_GETSTATICFIELD(jdouble, double, Double
2360 , HOTSPOT_JNI_GETSTATICDOUBLEFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICDOUBLEFIELD_RETURN() )
2361
2362 JNI_ENTRY(void, jni_SetStaticObjectField(JNIEnv *env, jclass clazz, jfieldID fieldID, jobject value))
2363 JNIWrapper("SetStaticObjectField");
2364 HOTSPOT_JNI_SETSTATICOBJECTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value);
2365 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID);
2366 assert(id->is_static_field_id(), "invalid static field id");
2367 // Keep JVMTI addition small and only check enabled flag here.
2368 // jni_SetField_probe() assumes that is okay to create handles.
2369 if (JvmtiExport::should_post_field_modification()) {
2370 jvalue field_value;
2371 field_value.l = value;
2372 JvmtiExport::jni_SetField_probe(thread, NULL, NULL, id->holder(), fieldID, true, 'L', (jvalue *)&field_value);
2373 }
2374 id->holder()->java_mirror()->obj_field_put(id->offset(), JNIHandles::resolve(value));
2375 HOTSPOT_JNI_SETSTATICOBJECTFIELD_RETURN();
2376 JNI_END
2377
2378
2379
2380 #define DEFINE_SETSTATICFIELD(Argument,Fieldname,Result,SigType,unionType \
2381 , EntryProbe, ReturnProbe) \
2382 \
2383 JNI_ENTRY(void, jni_SetStatic##Result##Field(JNIEnv *env, jclass clazz, jfieldID fieldID, Argument value)) \
2384 JNIWrapper("SetStatic" XSTR(Result) "Field"); \
2385 EntryProbe; \
2386 \
2387 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID); \
2388 assert(id->is_static_field_id(), "invalid static field id"); \
2389 /* Keep JVMTI addition small and only check enabled flag here. */ \
2390 /* jni_SetField_probe() assumes that is okay to create handles. */ \
2391 if (JvmtiExport::should_post_field_modification()) { \
2392 jvalue field_value; \
2393 field_value.unionType = value; \
2394 JvmtiExport::jni_SetField_probe(thread, NULL, NULL, id->holder(), fieldID, true, SigType, (jvalue *)&field_value); \
2395 } \
2396 id->holder()->java_mirror()-> Fieldname##_field_put (id->offset(), value); \
2397 ReturnProbe;\
2398 JNI_END
2399
2400 DEFINE_SETSTATICFIELD(jboolean, bool, Boolean, 'Z', z
2401 , HOTSPOT_JNI_SETSTATICBOOLEANFIELD_ENTRY(env, clazz, (uintptr_t)fieldID, value),
2402 HOTSPOT_JNI_SETSTATICBOOLEANFIELD_RETURN())
2403 DEFINE_SETSTATICFIELD(jbyte, byte, Byte, 'B', b
2404 , HOTSPOT_JNI_SETSTATICBYTEFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value),
2405 HOTSPOT_JNI_SETSTATICBYTEFIELD_RETURN())
2406 DEFINE_SETSTATICFIELD(jchar, char, Char, 'C', c
2407 , HOTSPOT_JNI_SETSTATICCHARFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value),
2408 HOTSPOT_JNI_SETSTATICCHARFIELD_RETURN())
2409 DEFINE_SETSTATICFIELD(jshort, short, Short, 'S', s
2410 , HOTSPOT_JNI_SETSTATICSHORTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value),
2411 HOTSPOT_JNI_SETSTATICSHORTFIELD_RETURN())
2412 DEFINE_SETSTATICFIELD(jint, int, Int, 'I', i
2413 , HOTSPOT_JNI_SETSTATICINTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value),
2414 HOTSPOT_JNI_SETSTATICINTFIELD_RETURN())
2415 DEFINE_SETSTATICFIELD(jlong, long, Long, 'J', j
2416 , HOTSPOT_JNI_SETSTATICLONGFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value),
2417 HOTSPOT_JNI_SETSTATICLONGFIELD_RETURN())
2418 // Float and double probes don't return value because dtrace doesn't currently support it
2419 DEFINE_SETSTATICFIELD(jfloat, float, Float, 'F', f
2420 , HOTSPOT_JNI_SETSTATICFLOATFIELD_ENTRY(env, clazz, (uintptr_t) fieldID),
2421 HOTSPOT_JNI_SETSTATICFLOATFIELD_RETURN())
2422 DEFINE_SETSTATICFIELD(jdouble, double, Double, 'D', d
2423 , HOTSPOT_JNI_SETSTATICDOUBLEFIELD_ENTRY(env, clazz, (uintptr_t) fieldID),
2424 HOTSPOT_JNI_SETSTATICDOUBLEFIELD_RETURN())
2425
2426 //
2427 // String Operations
2428 //
2429
2430 // Unicode Interface
2431
2432 DT_RETURN_MARK_DECL(NewString, jstring
2433 , HOTSPOT_JNI_NEWSTRING_RETURN(_ret_ref));
2434
2435 JNI_ENTRY(jstring, jni_NewString(JNIEnv *env, const jchar *unicodeChars, jsize len))
2436 JNIWrapper("NewString");
2437 HOTSPOT_JNI_NEWSTRING_ENTRY(env, (uint16_t *) unicodeChars, len);
2438 jstring ret = NULL;
2439 DT_RETURN_MARK(NewString, jstring, (const jstring&)ret);
2440 oop string=java_lang_String::create_oop_from_unicode((jchar*) unicodeChars, len, CHECK_NULL);
2441 ret = (jstring) JNIHandles::make_local(env, string);
2442 return ret;
2443 JNI_END
2444
2445
2446 JNI_QUICK_ENTRY(jsize, jni_GetStringLength(JNIEnv *env, jstring string))
2447 JNIWrapper("GetStringLength");
2448 HOTSPOT_JNI_GETSTRINGLENGTH_ENTRY(env, string);
2449 jsize ret = 0;
2450 oop s = JNIHandles::resolve_non_null(string);
2451 if (java_lang_String::value(s) != NULL) {
2452 ret = java_lang_String::length(s);
2453 }
2454 HOTSPOT_JNI_GETSTRINGLENGTH_RETURN(ret);
2455 return ret;
2456 JNI_END
2457
2458
2459 JNI_QUICK_ENTRY(const jchar*, jni_GetStringChars(
2460 JNIEnv *env, jstring string, jboolean *isCopy))
2461 JNIWrapper("GetStringChars");
2462 HOTSPOT_JNI_GETSTRINGCHARS_ENTRY(env, string, (uintptr_t *) isCopy);
2463 jchar* buf = NULL;
2464 oop s = JNIHandles::resolve_non_null(string);
2465 typeArrayOop s_value = java_lang_String::value(s);
2466 if (s_value != NULL) {
2467 int s_len = java_lang_String::length(s);
2468 bool is_latin1 = java_lang_String::is_latin1(s);
2469 buf = NEW_C_HEAP_ARRAY_RETURN_NULL(jchar, s_len + 1, mtInternal); // add one for zero termination
2470 /* JNI Specification states return NULL on OOM */
2471 if (buf != NULL) {
2472 if (s_len > 0) {
2473 if (!is_latin1) {
2474 memcpy(buf, s_value->char_at_addr(0), sizeof(jchar)*s_len);
2475 } else {
2476 for (int i = 0; i < s_len; i++) {
2477 buf[i] = ((jchar) s_value->byte_at(i)) & 0xff;
2478 }
2479 }
2480 }
2481 buf[s_len] = 0;
2482 //%note jni_5
2483 if (isCopy != NULL) {
2484 *isCopy = JNI_TRUE;
2485 }
2486 }
2487 }
2488 HOTSPOT_JNI_GETSTRINGCHARS_RETURN(buf);
2489 return buf;
2490 JNI_END
2491
2492
2493 JNI_QUICK_ENTRY(void, jni_ReleaseStringChars(JNIEnv *env, jstring str, const jchar *chars))
2494 JNIWrapper("ReleaseStringChars");
2495 HOTSPOT_JNI_RELEASESTRINGCHARS_ENTRY(env, str, (uint16_t *) chars);
2496 //%note jni_6
2497 if (chars != NULL) {
2498 // Since String objects are supposed to be immutable, don't copy any
2499 // new data back. A bad user will have to go after the char array.
2500 FreeHeap((void*) chars);
2501 }
2502 HOTSPOT_JNI_RELEASESTRINGCHARS_RETURN();
2503 JNI_END
2504
2505
2506 // UTF Interface
2507
2508 DT_RETURN_MARK_DECL(NewStringUTF, jstring
2509 , HOTSPOT_JNI_NEWSTRINGUTF_RETURN(_ret_ref));
2510
2511 JNI_ENTRY(jstring, jni_NewStringUTF(JNIEnv *env, const char *bytes))
2512 JNIWrapper("NewStringUTF");
2513 HOTSPOT_JNI_NEWSTRINGUTF_ENTRY(env, (char *) bytes);
2514 jstring ret;
2515 DT_RETURN_MARK(NewStringUTF, jstring, (const jstring&)ret);
2516
2517 oop result = java_lang_String::create_oop_from_str((char*) bytes, CHECK_NULL);
2518 ret = (jstring) JNIHandles::make_local(env, result);
2519 return ret;
2520 JNI_END
2521
2522
2523 JNI_ENTRY(jsize, jni_GetStringUTFLength(JNIEnv *env, jstring string))
2524 JNIWrapper("GetStringUTFLength");
2525 HOTSPOT_JNI_GETSTRINGUTFLENGTH_ENTRY(env, string);
2526 jsize ret = 0;
2527 oop java_string = JNIHandles::resolve_non_null(string);
2528 if (java_lang_String::value(java_string) != NULL) {
2529 ret = java_lang_String::utf8_length(java_string);
2530 }
2531 HOTSPOT_JNI_GETSTRINGUTFLENGTH_RETURN(ret);
2532 return ret;
2533 JNI_END
2534
2535
2536 JNI_ENTRY(const char*, jni_GetStringUTFChars(JNIEnv *env, jstring string, jboolean *isCopy))
2537 JNIWrapper("GetStringUTFChars");
2538 HOTSPOT_JNI_GETSTRINGUTFCHARS_ENTRY(env, string, (uintptr_t *) isCopy);
2539 char* result = NULL;
2540 oop java_string = JNIHandles::resolve_non_null(string);
2541 if (java_lang_String::value(java_string) != NULL) {
2542 size_t length = java_lang_String::utf8_length(java_string);
2543 /* JNI Specification states return NULL on OOM */
2544 result = AllocateHeap(length + 1, mtInternal, 0, AllocFailStrategy::RETURN_NULL);
2545 if (result != NULL) {
2546 java_lang_String::as_utf8_string(java_string, result, (int) length + 1);
2547 if (isCopy != NULL) {
2548 *isCopy = JNI_TRUE;
2549 }
2550 }
2551 }
2552 HOTSPOT_JNI_GETSTRINGUTFCHARS_RETURN(result);
2553 return result;
2554 JNI_END
2555
2556
2557 JNI_LEAF(void, jni_ReleaseStringUTFChars(JNIEnv *env, jstring str, const char *chars))
2558 JNIWrapper("ReleaseStringUTFChars");
2559 HOTSPOT_JNI_RELEASESTRINGUTFCHARS_ENTRY(env, str, (char *) chars);
2560 if (chars != NULL) {
2561 FreeHeap((char*) chars);
2562 }
2563 HOTSPOT_JNI_RELEASESTRINGUTFCHARS_RETURN();
2564 JNI_END
2565
2566
2567 JNI_QUICK_ENTRY(jsize, jni_GetArrayLength(JNIEnv *env, jarray array))
2568 JNIWrapper("GetArrayLength");
2569 HOTSPOT_JNI_GETARRAYLENGTH_ENTRY(env, array);
2570 arrayOop a = arrayOop(JNIHandles::resolve_non_null(array));
2571 assert(a->is_array(), "must be array");
2572 jsize ret = a->length();
2573 HOTSPOT_JNI_GETARRAYLENGTH_RETURN(ret);
2574 return ret;
2575 JNI_END
2576
2577
2578 //
2579 // Object Array Operations
2580 //
2581
2582 DT_RETURN_MARK_DECL(NewObjectArray, jobjectArray
2583 , HOTSPOT_JNI_NEWOBJECTARRAY_RETURN(_ret_ref));
2584
2585 JNI_ENTRY(jobjectArray, jni_NewObjectArray(JNIEnv *env, jsize length, jclass elementClass, jobject initialElement))
2586 JNIWrapper("NewObjectArray");
2587 HOTSPOT_JNI_NEWOBJECTARRAY_ENTRY(env, length, elementClass, initialElement);
2588 jobjectArray ret = NULL;
2589 DT_RETURN_MARK(NewObjectArray, jobjectArray, (const jobjectArray&)ret);
2590 KlassHandle ek(THREAD, java_lang_Class::as_Klass(JNIHandles::resolve_non_null(elementClass)));
2591 Klass* ako = ek()->array_klass(CHECK_NULL);
2592 KlassHandle ak = KlassHandle(THREAD, ako);
2593 ObjArrayKlass::cast(ak())->initialize(CHECK_NULL);
2594 objArrayOop result = ObjArrayKlass::cast(ak())->allocate(length, CHECK_NULL);
2595 oop initial_value = JNIHandles::resolve(initialElement);
2596 if (initial_value != NULL) { // array already initialized with NULL
2597 for (int index = 0; index < length; index++) {
2598 result->obj_at_put(index, initial_value);
2599 }
2600 }
2601 ret = (jobjectArray) JNIHandles::make_local(env, result);
2602 return ret;
2603 JNI_END
2604
2605 DT_RETURN_MARK_DECL(GetObjectArrayElement, jobject
2606 , HOTSPOT_JNI_GETOBJECTARRAYELEMENT_RETURN(_ret_ref));
2607
2608 JNI_ENTRY(jobject, jni_GetObjectArrayElement(JNIEnv *env, jobjectArray array, jsize index))
2609 JNIWrapper("GetObjectArrayElement");
2610 HOTSPOT_JNI_GETOBJECTARRAYELEMENT_ENTRY(env, array, index);
2611 jobject ret = NULL;
2612 DT_RETURN_MARK(GetObjectArrayElement, jobject, (const jobject&)ret);
2613 objArrayOop a = objArrayOop(JNIHandles::resolve_non_null(array));
2614 if (a->is_within_bounds(index)) {
2615 ret = JNIHandles::make_local(env, a->obj_at(index));
2616 return ret;
2617 } else {
2618 char buf[jintAsStringSize];
2619 sprintf(buf, "%d", index);
2620 THROW_MSG_0(vmSymbols::java_lang_ArrayIndexOutOfBoundsException(), buf);
2621 }
2622 JNI_END
2623
2624 DT_VOID_RETURN_MARK_DECL(SetObjectArrayElement
2625 , HOTSPOT_JNI_SETOBJECTARRAYELEMENT_RETURN());
2626
2627 JNI_ENTRY(void, jni_SetObjectArrayElement(JNIEnv *env, jobjectArray array, jsize index, jobject value))
2628 JNIWrapper("SetObjectArrayElement");
2629 HOTSPOT_JNI_SETOBJECTARRAYELEMENT_ENTRY(env, array, index, value);
2630 DT_VOID_RETURN_MARK(SetObjectArrayElement);
2631
2632 objArrayOop a = objArrayOop(JNIHandles::resolve_non_null(array));
2633 oop v = JNIHandles::resolve(value);
2634 if (a->is_within_bounds(index)) {
2635 if (v == NULL || v->is_a(ObjArrayKlass::cast(a->klass())->element_klass())) {
2636 a->obj_at_put(index, v);
2637 } else {
2638 THROW(vmSymbols::java_lang_ArrayStoreException());
2639 }
2640 } else {
2641 char buf[jintAsStringSize];
2642 sprintf(buf, "%d", index);
2643 THROW_MSG(vmSymbols::java_lang_ArrayIndexOutOfBoundsException(), buf);
2644 }
2645 JNI_END
2646
2647
2648
2649 #define DEFINE_NEWSCALARARRAY(Return,Allocator,Result \
2650 ,EntryProbe,ReturnProbe) \
2651 \
2652 DT_RETURN_MARK_DECL(New##Result##Array, Return \
2653 , ReturnProbe); \
2654 \
2655 JNI_ENTRY(Return, \
2656 jni_New##Result##Array(JNIEnv *env, jsize len)) \
2657 JNIWrapper("New" XSTR(Result) "Array"); \
2658 EntryProbe; \
2659 Return ret = NULL;\
2660 DT_RETURN_MARK(New##Result##Array, Return, (const Return&)ret);\
2661 \
2662 oop obj= oopFactory::Allocator(len, CHECK_0); \
2663 ret = (Return) JNIHandles::make_local(env, obj); \
2664 return ret;\
2665 JNI_END
2666
2667 DEFINE_NEWSCALARARRAY(jbooleanArray, new_boolArray, Boolean,
2668 HOTSPOT_JNI_NEWBOOLEANARRAY_ENTRY(env, len),
2669 HOTSPOT_JNI_NEWBOOLEANARRAY_RETURN(_ret_ref))
2670 DEFINE_NEWSCALARARRAY(jbyteArray, new_byteArray, Byte,
2671 HOTSPOT_JNI_NEWBYTEARRAY_ENTRY(env, len),
2672 HOTSPOT_JNI_NEWBYTEARRAY_RETURN(_ret_ref))
2673 DEFINE_NEWSCALARARRAY(jshortArray, new_shortArray, Short,
2674 HOTSPOT_JNI_NEWSHORTARRAY_ENTRY(env, len),
2675 HOTSPOT_JNI_NEWSHORTARRAY_RETURN(_ret_ref))
2676 DEFINE_NEWSCALARARRAY(jcharArray, new_charArray, Char,
2677 HOTSPOT_JNI_NEWCHARARRAY_ENTRY(env, len),
2678 HOTSPOT_JNI_NEWCHARARRAY_RETURN(_ret_ref))
2679 DEFINE_NEWSCALARARRAY(jintArray, new_intArray, Int,
2680 HOTSPOT_JNI_NEWINTARRAY_ENTRY(env, len),
2681 HOTSPOT_JNI_NEWINTARRAY_RETURN(_ret_ref))
2682 DEFINE_NEWSCALARARRAY(jlongArray, new_longArray, Long,
2683 HOTSPOT_JNI_NEWLONGARRAY_ENTRY(env, len),
2684 HOTSPOT_JNI_NEWLONGARRAY_RETURN(_ret_ref))
2685 DEFINE_NEWSCALARARRAY(jfloatArray, new_singleArray, Float,
2686 HOTSPOT_JNI_NEWFLOATARRAY_ENTRY(env, len),
2687 HOTSPOT_JNI_NEWFLOATARRAY_RETURN(_ret_ref))
2688 DEFINE_NEWSCALARARRAY(jdoubleArray, new_doubleArray, Double,
2689 HOTSPOT_JNI_NEWDOUBLEARRAY_ENTRY(env, len),
2690 HOTSPOT_JNI_NEWDOUBLEARRAY_RETURN(_ret_ref))
2691
2692 // Return an address which will fault if the caller writes to it.
2693
2694 static char* get_bad_address() {
2695 static char* bad_address = NULL;
2696 if (bad_address == NULL) {
2697 size_t size = os::vm_allocation_granularity();
2698 bad_address = os::reserve_memory(size);
2699 if (bad_address != NULL) {
2700 os::protect_memory(bad_address, size, os::MEM_PROT_READ,
2701 /*is_committed*/false);
2702 MemTracker::record_virtual_memory_type((void*)bad_address, mtInternal);
2703 }
2704 }
2705 return bad_address;
2706 }
2707
2708
2709
2710 #define DEFINE_GETSCALARARRAYELEMENTS(ElementTag,ElementType,Result, Tag \
2711 , EntryProbe, ReturnProbe) \
2712 \
2713 JNI_QUICK_ENTRY(ElementType*, \
2714 jni_Get##Result##ArrayElements(JNIEnv *env, ElementType##Array array, jboolean *isCopy)) \
2715 JNIWrapper("Get" XSTR(Result) "ArrayElements"); \
2716 EntryProbe; \
2717 /* allocate an chunk of memory in c land */ \
2718 typeArrayOop a = typeArrayOop(JNIHandles::resolve_non_null(array)); \
2719 ElementType* result; \
2720 int len = a->length(); \
2721 if (len == 0) { \
2722 /* Empty array: legal but useless, can't return NULL. \
2723 * Return a pointer to something useless. \
2724 * Avoid asserts in typeArrayOop. */ \
2725 result = (ElementType*)get_bad_address(); \
2726 } else { \
2727 /* JNI Specification states return NULL on OOM */ \
2728 result = NEW_C_HEAP_ARRAY_RETURN_NULL(ElementType, len, mtInternal); \
2729 if (result != NULL) { \
2730 /* copy the array to the c chunk */ \
2731 memcpy(result, a->Tag##_at_addr(0), sizeof(ElementType)*len); \
2732 if (isCopy) { \
2733 *isCopy = JNI_TRUE; \
2734 } \
2735 } \
2736 } \
2737 ReturnProbe; \
2738 return result; \
2739 JNI_END
2740
2741 DEFINE_GETSCALARARRAYELEMENTS(T_BOOLEAN, jboolean, Boolean, bool
2742 , HOTSPOT_JNI_GETBOOLEANARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy),
2743 HOTSPOT_JNI_GETBOOLEANARRAYELEMENTS_RETURN((uintptr_t*)result))
2744 DEFINE_GETSCALARARRAYELEMENTS(T_BYTE, jbyte, Byte, byte
2745 , HOTSPOT_JNI_GETBYTEARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy),
2746 HOTSPOT_JNI_GETBYTEARRAYELEMENTS_RETURN((char*)result))
2747 DEFINE_GETSCALARARRAYELEMENTS(T_SHORT, jshort, Short, short
2748 , HOTSPOT_JNI_GETSHORTARRAYELEMENTS_ENTRY(env, (uint16_t*) array, (uintptr_t *) isCopy),
2749 HOTSPOT_JNI_GETSHORTARRAYELEMENTS_RETURN((uint16_t*)result))
2750 DEFINE_GETSCALARARRAYELEMENTS(T_CHAR, jchar, Char, char
2751 , HOTSPOT_JNI_GETCHARARRAYELEMENTS_ENTRY(env, (uint16_t*) array, (uintptr_t *) isCopy),
2752 HOTSPOT_JNI_GETCHARARRAYELEMENTS_RETURN(result))
2753 DEFINE_GETSCALARARRAYELEMENTS(T_INT, jint, Int, int
2754 , HOTSPOT_JNI_GETINTARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy),
2755 HOTSPOT_JNI_GETINTARRAYELEMENTS_RETURN((uint32_t*)result))
2756 DEFINE_GETSCALARARRAYELEMENTS(T_LONG, jlong, Long, long
2757 , HOTSPOT_JNI_GETLONGARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy),
2758 HOTSPOT_JNI_GETLONGARRAYELEMENTS_RETURN(((uintptr_t*)result)))
2759 // Float and double probes don't return value because dtrace doesn't currently support it
2760 DEFINE_GETSCALARARRAYELEMENTS(T_FLOAT, jfloat, Float, float
2761 , HOTSPOT_JNI_GETFLOATARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy),
2762 HOTSPOT_JNI_GETFLOATARRAYELEMENTS_RETURN(result))
2763 DEFINE_GETSCALARARRAYELEMENTS(T_DOUBLE, jdouble, Double, double
2764 , HOTSPOT_JNI_GETDOUBLEARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy),
2765 HOTSPOT_JNI_GETDOUBLEARRAYELEMENTS_RETURN(result))
2766
2767
2768 #define DEFINE_RELEASESCALARARRAYELEMENTS(ElementTag,ElementType,Result,Tag \
2769 , EntryProbe, ReturnProbe);\
2770 \
2771 JNI_QUICK_ENTRY(void, \
2772 jni_Release##Result##ArrayElements(JNIEnv *env, ElementType##Array array, \
2773 ElementType *buf, jint mode)) \
2774 JNIWrapper("Release" XSTR(Result) "ArrayElements"); \
2775 EntryProbe; \
2776 typeArrayOop a = typeArrayOop(JNIHandles::resolve_non_null(array)); \
2777 int len = a->length(); \
2778 if (len != 0) { /* Empty array: nothing to free or copy. */ \
2779 if ((mode == 0) || (mode == JNI_COMMIT)) { \
2780 memcpy(a->Tag##_at_addr(0), buf, sizeof(ElementType)*len); \
2781 } \
2782 if ((mode == 0) || (mode == JNI_ABORT)) { \
2783 FreeHeap(buf); \
2784 } \
2785 } \
2786 ReturnProbe; \
2787 JNI_END
2788
2789 DEFINE_RELEASESCALARARRAYELEMENTS(T_BOOLEAN, jboolean, Boolean, bool
2790 , HOTSPOT_JNI_RELEASEBOOLEANARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) buf, mode),
2791 HOTSPOT_JNI_RELEASEBOOLEANARRAYELEMENTS_RETURN())
2792 DEFINE_RELEASESCALARARRAYELEMENTS(T_BYTE, jbyte, Byte, byte
2793 , HOTSPOT_JNI_RELEASEBYTEARRAYELEMENTS_ENTRY(env, array, (char *) buf, mode),
2794 HOTSPOT_JNI_RELEASEBYTEARRAYELEMENTS_RETURN())
2795 DEFINE_RELEASESCALARARRAYELEMENTS(T_SHORT, jshort, Short, short
2796 , HOTSPOT_JNI_RELEASESHORTARRAYELEMENTS_ENTRY(env, array, (uint16_t *) buf, mode),
2797 HOTSPOT_JNI_RELEASESHORTARRAYELEMENTS_RETURN())
2798 DEFINE_RELEASESCALARARRAYELEMENTS(T_CHAR, jchar, Char, char
2799 , HOTSPOT_JNI_RELEASECHARARRAYELEMENTS_ENTRY(env, array, (uint16_t *) buf, mode),
2800 HOTSPOT_JNI_RELEASECHARARRAYELEMENTS_RETURN())
2801 DEFINE_RELEASESCALARARRAYELEMENTS(T_INT, jint, Int, int
2802 , HOTSPOT_JNI_RELEASEINTARRAYELEMENTS_ENTRY(env, array, (uint32_t *) buf, mode),
2803 HOTSPOT_JNI_RELEASEINTARRAYELEMENTS_RETURN())
2804 DEFINE_RELEASESCALARARRAYELEMENTS(T_LONG, jlong, Long, long
2805 , HOTSPOT_JNI_RELEASELONGARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) buf, mode),
2806 HOTSPOT_JNI_RELEASELONGARRAYELEMENTS_RETURN())
2807 DEFINE_RELEASESCALARARRAYELEMENTS(T_FLOAT, jfloat, Float, float
2808 , HOTSPOT_JNI_RELEASEFLOATARRAYELEMENTS_ENTRY(env, array, (float *) buf, mode),
2809 HOTSPOT_JNI_RELEASEFLOATARRAYELEMENTS_RETURN())
2810 DEFINE_RELEASESCALARARRAYELEMENTS(T_DOUBLE, jdouble, Double, double
2811 , HOTSPOT_JNI_RELEASEDOUBLEARRAYELEMENTS_ENTRY(env, array, (double *) buf, mode),
2812 HOTSPOT_JNI_RELEASEDOUBLEARRAYELEMENTS_RETURN())
2813
2814
2815 #define DEFINE_GETSCALARARRAYREGION(ElementTag,ElementType,Result, Tag \
2816 , EntryProbe, ReturnProbe); \
2817 DT_VOID_RETURN_MARK_DECL(Get##Result##ArrayRegion \
2818 , ReturnProbe); \
2819 \
2820 JNI_ENTRY(void, \
2821 jni_Get##Result##ArrayRegion(JNIEnv *env, ElementType##Array array, jsize start, \
2822 jsize len, ElementType *buf)) \
2823 JNIWrapper("Get" XSTR(Result) "ArrayRegion"); \
2824 EntryProbe; \
2825 DT_VOID_RETURN_MARK(Get##Result##ArrayRegion); \
2826 typeArrayOop src = typeArrayOop(JNIHandles::resolve_non_null(array)); \
2827 if (start < 0 || len < 0 || ((unsigned int)start + (unsigned int)len > (unsigned int)src->length())) { \
2828 THROW(vmSymbols::java_lang_ArrayIndexOutOfBoundsException()); \
2829 } else { \
2830 if (len > 0) { \
2831 int sc = TypeArrayKlass::cast(src->klass())->log2_element_size(); \
2832 memcpy((u_char*) buf, \
2833 (u_char*) src->Tag##_at_addr(start), \
2834 len << sc); \
2835 } \
2836 } \
2837 JNI_END
2838
2839 DEFINE_GETSCALARARRAYREGION(T_BOOLEAN, jboolean,Boolean, bool
2840 , HOTSPOT_JNI_GETBOOLEANARRAYREGION_ENTRY(env, array, start, len, (uintptr_t *) buf),
2841 HOTSPOT_JNI_GETBOOLEANARRAYREGION_RETURN());
2842 DEFINE_GETSCALARARRAYREGION(T_BYTE, jbyte, Byte, byte
2843 , HOTSPOT_JNI_GETBYTEARRAYREGION_ENTRY(env, array, start, len, (char *) buf),
2844 HOTSPOT_JNI_GETBYTEARRAYREGION_RETURN());
2845 DEFINE_GETSCALARARRAYREGION(T_SHORT, jshort, Short, short
2846 , HOTSPOT_JNI_GETSHORTARRAYREGION_ENTRY(env, array, start, len, (uint16_t *) buf),
2847 HOTSPOT_JNI_GETSHORTARRAYREGION_RETURN());
2848 DEFINE_GETSCALARARRAYREGION(T_CHAR, jchar, Char, char
2849 , HOTSPOT_JNI_GETCHARARRAYREGION_ENTRY(env, array, start, len, (uint16_t*) buf),
2850 HOTSPOT_JNI_GETCHARARRAYREGION_RETURN());
2851 DEFINE_GETSCALARARRAYREGION(T_INT, jint, Int, int
2852 , HOTSPOT_JNI_GETINTARRAYREGION_ENTRY(env, array, start, len, (uint32_t*) buf),
2853 HOTSPOT_JNI_GETINTARRAYREGION_RETURN());
2854 DEFINE_GETSCALARARRAYREGION(T_LONG, jlong, Long, long
2855 , HOTSPOT_JNI_GETLONGARRAYREGION_ENTRY(env, array, start, len, (uintptr_t *) buf),
2856 HOTSPOT_JNI_GETLONGARRAYREGION_RETURN());
2857 DEFINE_GETSCALARARRAYREGION(T_FLOAT, jfloat, Float, float
2858 , HOTSPOT_JNI_GETFLOATARRAYREGION_ENTRY(env, array, start, len, (float *) buf),
2859 HOTSPOT_JNI_GETFLOATARRAYREGION_RETURN());
2860 DEFINE_GETSCALARARRAYREGION(T_DOUBLE, jdouble, Double, double
2861 , HOTSPOT_JNI_GETDOUBLEARRAYREGION_ENTRY(env, array, start, len, (double *) buf),
2862 HOTSPOT_JNI_GETDOUBLEARRAYREGION_RETURN());
2863
2864
2865 #define DEFINE_SETSCALARARRAYREGION(ElementTag,ElementType,Result, Tag \
2866 , EntryProbe, ReturnProbe); \
2867 DT_VOID_RETURN_MARK_DECL(Set##Result##ArrayRegion \
2868 ,ReturnProbe); \
2869 \
2870 JNI_ENTRY(void, \
2871 jni_Set##Result##ArrayRegion(JNIEnv *env, ElementType##Array array, jsize start, \
2872 jsize len, const ElementType *buf)) \
2873 JNIWrapper("Set" XSTR(Result) "ArrayRegion"); \
2874 EntryProbe; \
2875 DT_VOID_RETURN_MARK(Set##Result##ArrayRegion); \
2876 typeArrayOop dst = typeArrayOop(JNIHandles::resolve_non_null(array)); \
2877 if (start < 0 || len < 0 || ((unsigned int)start + (unsigned int)len > (unsigned int)dst->length())) { \
2878 THROW(vmSymbols::java_lang_ArrayIndexOutOfBoundsException()); \
2879 } else { \
2880 if (len > 0) { \
2881 int sc = TypeArrayKlass::cast(dst->klass())->log2_element_size(); \
2882 memcpy((u_char*) dst->Tag##_at_addr(start), \
2883 (u_char*) buf, \
2884 len << sc); \
2885 } \
2886 } \
2887 JNI_END
2888
2889 DEFINE_SETSCALARARRAYREGION(T_BOOLEAN, jboolean, Boolean, bool
2890 , HOTSPOT_JNI_SETBOOLEANARRAYREGION_ENTRY(env, array, start, len, (uintptr_t *)buf),
2891 HOTSPOT_JNI_SETBOOLEANARRAYREGION_RETURN())
2892 DEFINE_SETSCALARARRAYREGION(T_BYTE, jbyte, Byte, byte
2893 , HOTSPOT_JNI_SETBYTEARRAYREGION_ENTRY(env, array, start, len, (char *) buf),
2894 HOTSPOT_JNI_SETBYTEARRAYREGION_RETURN())
2895 DEFINE_SETSCALARARRAYREGION(T_SHORT, jshort, Short, short
2896 , HOTSPOT_JNI_SETSHORTARRAYREGION_ENTRY(env, array, start, len, (uint16_t *) buf),
2897 HOTSPOT_JNI_SETSHORTARRAYREGION_RETURN())
2898 DEFINE_SETSCALARARRAYREGION(T_CHAR, jchar, Char, char
2899 , HOTSPOT_JNI_SETCHARARRAYREGION_ENTRY(env, array, start, len, (uint16_t *) buf),
2900 HOTSPOT_JNI_SETCHARARRAYREGION_RETURN())
2901 DEFINE_SETSCALARARRAYREGION(T_INT, jint, Int, int
2902 , HOTSPOT_JNI_SETINTARRAYREGION_ENTRY(env, array, start, len, (uint32_t *) buf),
2903 HOTSPOT_JNI_SETINTARRAYREGION_RETURN())
2904 DEFINE_SETSCALARARRAYREGION(T_LONG, jlong, Long, long
2905 , HOTSPOT_JNI_SETLONGARRAYREGION_ENTRY(env, array, start, len, (uintptr_t *) buf),
2906 HOTSPOT_JNI_SETLONGARRAYREGION_RETURN())
2907 DEFINE_SETSCALARARRAYREGION(T_FLOAT, jfloat, Float, float
2908 , HOTSPOT_JNI_SETFLOATARRAYREGION_ENTRY(env, array, start, len, (float *) buf),
2909 HOTSPOT_JNI_SETFLOATARRAYREGION_RETURN())
2910 DEFINE_SETSCALARARRAYREGION(T_DOUBLE, jdouble, Double, double
2911 , HOTSPOT_JNI_SETDOUBLEARRAYREGION_ENTRY(env, array, start, len, (double *) buf),
2912 HOTSPOT_JNI_SETDOUBLEARRAYREGION_RETURN())
2913
2914
2915 //
2916 // Interception of natives
2917 //
2918
2919 // The RegisterNatives call being attempted tried to register with a method that
2920 // is not native. Ask JVM TI what prefixes have been specified. Then check
2921 // to see if the native method is now wrapped with the prefixes. See the
2922 // SetNativeMethodPrefix(es) functions in the JVM TI Spec for details.
2923 static Method* find_prefixed_native(KlassHandle k,
2924 Symbol* name, Symbol* signature, TRAPS) {
2925 #if INCLUDE_JVMTI
2926 ResourceMark rm(THREAD);
2927 Method* method;
2928 int name_len = name->utf8_length();
2929 char* name_str = name->as_utf8();
2930 int prefix_count;
2931 char** prefixes = JvmtiExport::get_all_native_method_prefixes(&prefix_count);
2932 for (int i = 0; i < prefix_count; i++) {
2933 char* prefix = prefixes[i];
2934 int prefix_len = (int)strlen(prefix);
2935
2936 // try adding this prefix to the method name and see if it matches another method name
2937 int trial_len = name_len + prefix_len;
2938 char* trial_name_str = NEW_RESOURCE_ARRAY(char, trial_len + 1);
2939 strcpy(trial_name_str, prefix);
2940 strcat(trial_name_str, name_str);
2941 TempNewSymbol trial_name = SymbolTable::probe(trial_name_str, trial_len);
2942 if (trial_name == NULL) {
2943 continue; // no such symbol, so this prefix wasn't used, try the next prefix
2944 }
2945 method = k()->lookup_method(trial_name, signature);
2946 if (method == NULL) {
2947 continue; // signature doesn't match, try the next prefix
2948 }
2949 if (method->is_native()) {
2950 method->set_is_prefixed_native();
2951 return method; // wahoo, we found a prefixed version of the method, return it
2952 }
2953 // found as non-native, so prefix is good, add it, probably just need more prefixes
2954 name_len = trial_len;
2955 name_str = trial_name_str;
2956 }
2957 #endif // INCLUDE_JVMTI
2958 return NULL; // not found
2959 }
2960
2961 static bool register_native(KlassHandle k, Symbol* name, Symbol* signature, address entry, TRAPS) {
2962 Method* method = k()->lookup_method(name, signature);
2963 if (method == NULL) {
2964 ResourceMark rm;
2965 stringStream st;
2966 st.print("Method %s name or signature does not match",
2967 Method::name_and_sig_as_C_string(k(), name, signature));
2968 THROW_MSG_(vmSymbols::java_lang_NoSuchMethodError(), st.as_string(), false);
2969 }
2970 if (!method->is_native()) {
2971 // trying to register to a non-native method, see if a JVM TI agent has added prefix(es)
2972 method = find_prefixed_native(k, name, signature, THREAD);
2973 if (method == NULL) {
2974 ResourceMark rm;
2975 stringStream st;
2976 st.print("Method %s is not declared as native",
2977 Method::name_and_sig_as_C_string(k(), name, signature));
2978 THROW_MSG_(vmSymbols::java_lang_NoSuchMethodError(), st.as_string(), false);
2979 }
2980 }
2981
2982 if (entry != NULL) {
2983 method->set_native_function(entry,
2984 Method::native_bind_event_is_interesting);
2985 } else {
2986 method->clear_native_function();
2987 }
2988 if (PrintJNIResolving) {
2989 ResourceMark rm(THREAD);
2990 tty->print_cr("[Registering JNI native method %s.%s]",
2991 method->method_holder()->external_name(),
2992 method->name()->as_C_string());
2993 }
2994 return true;
2995 }
2996
2997 DT_RETURN_MARK_DECL(RegisterNatives, jint
2998 , HOTSPOT_JNI_REGISTERNATIVES_RETURN(_ret_ref));
2999
3000 JNI_ENTRY(jint, jni_RegisterNatives(JNIEnv *env, jclass clazz,
3001 const JNINativeMethod *methods,
3002 jint nMethods))
3003 JNIWrapper("RegisterNatives");
3004 HOTSPOT_JNI_REGISTERNATIVES_ENTRY(env, clazz, (void *) methods, nMethods);
3005 jint ret = 0;
3006 DT_RETURN_MARK(RegisterNatives, jint, (const jint&)ret);
3007
3008 KlassHandle h_k(thread, java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz)));
3009
3010 for (int index = 0; index < nMethods; index++) {
3011 const char* meth_name = methods[index].name;
3012 const char* meth_sig = methods[index].signature;
3013 int meth_name_len = (int)strlen(meth_name);
3014
3015 // The class should have been loaded (we have an instance of the class
3016 // passed in) so the method and signature should already be in the symbol
3017 // table. If they're not there, the method doesn't exist.
3018 TempNewSymbol name = SymbolTable::probe(meth_name, meth_name_len);
3019 TempNewSymbol signature = SymbolTable::probe(meth_sig, (int)strlen(meth_sig));
3020
3021 if (name == NULL || signature == NULL) {
3022 ResourceMark rm;
3023 stringStream st;
3024 st.print("Method %s.%s%s not found", h_k()->external_name(), meth_name, meth_sig);
3025 // Must return negative value on failure
3026 THROW_MSG_(vmSymbols::java_lang_NoSuchMethodError(), st.as_string(), -1);
3027 }
3028
3029 bool res = register_native(h_k, name, signature,
3030 (address) methods[index].fnPtr, THREAD);
3031 if (!res) {
3032 ret = -1;
3033 break;
3034 }
3035 }
3036 return ret;
3037 JNI_END
3038
3039
3040 JNI_ENTRY(jint, jni_UnregisterNatives(JNIEnv *env, jclass clazz))
3041 JNIWrapper("UnregisterNatives");
3042 HOTSPOT_JNI_UNREGISTERNATIVES_ENTRY(env, clazz);
3043 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz));
3044 //%note jni_2
3045 if (k->is_instance_klass()) {
3046 for (int index = 0; index < InstanceKlass::cast(k)->methods()->length(); index++) {
3047 Method* m = InstanceKlass::cast(k)->methods()->at(index);
3048 if (m->is_native()) {
3049 m->clear_native_function();
3050 m->set_signature_handler(NULL);
3051 }
3052 }
3053 }
3054 HOTSPOT_JNI_UNREGISTERNATIVES_RETURN(0);
3055 return 0;
3056 JNI_END
3057
3058 //
3059 // Monitor functions
3060 //
3061
3062 DT_RETURN_MARK_DECL(MonitorEnter, jint
3063 , HOTSPOT_JNI_MONITORENTER_RETURN(_ret_ref));
3064
3065 JNI_ENTRY(jint, jni_MonitorEnter(JNIEnv *env, jobject jobj))
3066 HOTSPOT_JNI_MONITORENTER_ENTRY(env, jobj);
3067 jint ret = JNI_ERR;
3068 DT_RETURN_MARK(MonitorEnter, jint, (const jint&)ret);
3069
3070 // If the object is null, we can't do anything with it
3071 if (jobj == NULL) {
3072 THROW_(vmSymbols::java_lang_NullPointerException(), JNI_ERR);
3073 }
3074
3075 Handle obj(thread, JNIHandles::resolve_non_null(jobj));
3076 ObjectSynchronizer::jni_enter(obj, CHECK_(JNI_ERR));
3077 ret = JNI_OK;
3078 return ret;
3079 JNI_END
3080
3081 DT_RETURN_MARK_DECL(MonitorExit, jint
3082 , HOTSPOT_JNI_MONITOREXIT_RETURN(_ret_ref));
3083
3084 JNI_ENTRY(jint, jni_MonitorExit(JNIEnv *env, jobject jobj))
3085 HOTSPOT_JNI_MONITOREXIT_ENTRY(env, jobj);
3086 jint ret = JNI_ERR;
3087 DT_RETURN_MARK(MonitorExit, jint, (const jint&)ret);
3088
3089 // Don't do anything with a null object
3090 if (jobj == NULL) {
3091 THROW_(vmSymbols::java_lang_NullPointerException(), JNI_ERR);
3092 }
3093
3094 Handle obj(THREAD, JNIHandles::resolve_non_null(jobj));
3095 ObjectSynchronizer::jni_exit(obj(), CHECK_(JNI_ERR));
3096
3097 ret = JNI_OK;
3098 return ret;
3099 JNI_END
3100
3101 //
3102 // Extensions
3103 //
3104
3105 DT_VOID_RETURN_MARK_DECL(GetStringRegion
3106 , HOTSPOT_JNI_GETSTRINGREGION_RETURN());
3107
3108 JNI_ENTRY(void, jni_GetStringRegion(JNIEnv *env, jstring string, jsize start, jsize len, jchar *buf))
3109 JNIWrapper("GetStringRegion");
3110 HOTSPOT_JNI_GETSTRINGREGION_ENTRY(env, string, start, len, buf);
3111 DT_VOID_RETURN_MARK(GetStringRegion);
3112 oop s = JNIHandles::resolve_non_null(string);
3113 int s_len = java_lang_String::length(s);
3114 if (start < 0 || len < 0 || start + len > s_len) {
3115 THROW(vmSymbols::java_lang_StringIndexOutOfBoundsException());
3116 } else {
3117 if (len > 0) {
3118 typeArrayOop s_value = java_lang_String::value(s);
3119 bool is_latin1 = java_lang_String::is_latin1(s);
3120 if (!is_latin1) {
3121 memcpy(buf, s_value->char_at_addr(start), sizeof(jchar)*len);
3122 } else {
3123 for (int i = 0; i < len; i++) {
3124 buf[i] = ((jchar) s_value->byte_at(i + start)) & 0xff;
3125 }
3126 }
3127 }
3128 }
3129 JNI_END
3130
3131 DT_VOID_RETURN_MARK_DECL(GetStringUTFRegion
3132 , HOTSPOT_JNI_GETSTRINGUTFREGION_RETURN());
3133
3134 JNI_ENTRY(void, jni_GetStringUTFRegion(JNIEnv *env, jstring string, jsize start, jsize len, char *buf))
3135 JNIWrapper("GetStringUTFRegion");
3136 HOTSPOT_JNI_GETSTRINGUTFREGION_ENTRY(env, string, start, len, buf);
3137 DT_VOID_RETURN_MARK(GetStringUTFRegion);
3138 oop s = JNIHandles::resolve_non_null(string);
3139 int s_len = java_lang_String::length(s);
3140 if (start < 0 || len < 0 || start + len > s_len) {
3141 THROW(vmSymbols::java_lang_StringIndexOutOfBoundsException());
3142 } else {
3143 //%note jni_7
3144 if (len > 0) {
3145 // Assume the buffer is large enough as the JNI spec. does not require user error checking
3146 java_lang_String::as_utf8_string(s, start, len, buf, INT_MAX);
3147 // as_utf8_string null-terminates the result string
3148 } else {
3149 // JDK null-terminates the buffer even in len is zero
3150 if (buf != NULL) {
3151 buf[0] = 0;
3152 }
3153 }
3154 }
3155 JNI_END
3156
3157
3158 JNI_ENTRY(void*, jni_GetPrimitiveArrayCritical(JNIEnv *env, jarray array, jboolean *isCopy))
3159 JNIWrapper("GetPrimitiveArrayCritical");
3160 HOTSPOT_JNI_GETPRIMITIVEARRAYCRITICAL_ENTRY(env, array, (uintptr_t *) isCopy);
3161 GCLocker::lock_critical(thread);
3162 if (isCopy != NULL) {
3163 *isCopy = JNI_FALSE;
3164 }
3165 oop a = JNIHandles::resolve_non_null(array);
3166 assert(a->is_array(), "just checking");
3167 BasicType type;
3168 if (a->is_objArray()) {
3169 type = T_OBJECT;
3170 } else {
3171 type = TypeArrayKlass::cast(a->klass())->element_type();
3172 }
3173 void* ret = arrayOop(a)->base(type);
3174 HOTSPOT_JNI_GETPRIMITIVEARRAYCRITICAL_RETURN(ret);
3175 return ret;
3176 JNI_END
3177
3178
3179 JNI_ENTRY(void, jni_ReleasePrimitiveArrayCritical(JNIEnv *env, jarray array, void *carray, jint mode))
3180 JNIWrapper("ReleasePrimitiveArrayCritical");
3181 HOTSPOT_JNI_RELEASEPRIMITIVEARRAYCRITICAL_ENTRY(env, array, carray, mode);
3182 // The array, carray and mode arguments are ignored
3183 GCLocker::unlock_critical(thread);
3184 HOTSPOT_JNI_RELEASEPRIMITIVEARRAYCRITICAL_RETURN();
3185 JNI_END
3186
3187
3188 JNI_ENTRY(const jchar*, jni_GetStringCritical(JNIEnv *env, jstring string, jboolean *isCopy))
3189 JNIWrapper("GetStringCritical");
3190 HOTSPOT_JNI_GETSTRINGCRITICAL_ENTRY(env, string, (uintptr_t *) isCopy);
3191 GCLocker::lock_critical(thread);
3192 oop s = JNIHandles::resolve_non_null(string);
3193 typeArrayOop s_value = java_lang_String::value(s);
3194 bool is_latin1 = java_lang_String::is_latin1(s);
3195 if (isCopy != NULL) {
3196 *isCopy = is_latin1 ? JNI_TRUE : JNI_FALSE;
3197 }
3198 jchar* ret;
3199 if (!is_latin1) {
3200 ret = (jchar*) s_value->base(T_CHAR);
3201 } else {
3202 // Inflate latin1 encoded string to UTF16
3203 int s_len = java_lang_String::length(s);
3204 ret = NEW_C_HEAP_ARRAY_RETURN_NULL(jchar, s_len + 1, mtInternal); // add one for zero termination
3205 /* JNI Specification states return NULL on OOM */
3206 if (ret != NULL) {
3207 for (int i = 0; i < s_len; i++) {
3208 ret[i] = ((jchar) s_value->byte_at(i)) & 0xff;
3209 }
3210 ret[s_len] = 0;
3211 }
3212 }
3213 HOTSPOT_JNI_GETSTRINGCRITICAL_RETURN((uint16_t *) ret);
3214 return ret;
3215 JNI_END
3216
3217
3218 JNI_ENTRY(void, jni_ReleaseStringCritical(JNIEnv *env, jstring str, const jchar *chars))
3219 JNIWrapper("ReleaseStringCritical");
3220 HOTSPOT_JNI_RELEASESTRINGCRITICAL_ENTRY(env, str, (uint16_t *) chars);
3221 // The str and chars arguments are ignored for UTF16 strings
3222 oop s = JNIHandles::resolve_non_null(str);
3223 bool is_latin1 = java_lang_String::is_latin1(s);
3224 if (is_latin1) {
3225 // For latin1 string, free jchar array allocated by earlier call to GetStringCritical.
3226 // This assumes that ReleaseStringCritical bookends GetStringCritical.
3227 FREE_C_HEAP_ARRAY(jchar, chars);
3228 }
3229 GCLocker::unlock_critical(thread);
3230 HOTSPOT_JNI_RELEASESTRINGCRITICAL_RETURN();
3231 JNI_END
3232
3233
3234 JNI_ENTRY(jweak, jni_NewWeakGlobalRef(JNIEnv *env, jobject ref))
3235 JNIWrapper("jni_NewWeakGlobalRef");
3236 HOTSPOT_JNI_NEWWEAKGLOBALREF_ENTRY(env, ref);
3237 Handle ref_handle(thread, JNIHandles::resolve(ref));
3238 jweak ret = JNIHandles::make_weak_global(ref_handle);
3239 HOTSPOT_JNI_NEWWEAKGLOBALREF_RETURN(ret);
3240 return ret;
3241 JNI_END
3242
3243 // Must be JNI_ENTRY (with HandleMark)
3244 JNI_ENTRY(void, jni_DeleteWeakGlobalRef(JNIEnv *env, jweak ref))
3245 JNIWrapper("jni_DeleteWeakGlobalRef");
3246 HOTSPOT_JNI_DELETEWEAKGLOBALREF_ENTRY(env, ref);
3247 JNIHandles::destroy_weak_global(ref);
3248 HOTSPOT_JNI_DELETEWEAKGLOBALREF_RETURN();
3249 JNI_END
3250
3251
3252 JNI_QUICK_ENTRY(jboolean, jni_ExceptionCheck(JNIEnv *env))
3253 JNIWrapper("jni_ExceptionCheck");
3254 HOTSPOT_JNI_EXCEPTIONCHECK_ENTRY(env);
3255 jni_check_async_exceptions(thread);
3256 jboolean ret = (thread->has_pending_exception()) ? JNI_TRUE : JNI_FALSE;
3257 HOTSPOT_JNI_EXCEPTIONCHECK_RETURN(ret);
3258 return ret;
3259 JNI_END
3260
3261
3262 // Initialization state for three routines below relating to
3263 // java.nio.DirectBuffers
3264 static jint directBufferSupportInitializeStarted = 0;
3265 static volatile jint directBufferSupportInitializeEnded = 0;
3266 static volatile jint directBufferSupportInitializeFailed = 0;
3267 static jclass bufferClass = NULL;
3268 static jclass directBufferClass = NULL;
3269 static jclass directByteBufferClass = NULL;
3270 static jmethodID directByteBufferConstructor = NULL;
3271 static jfieldID directBufferAddressField = NULL;
3272 static jfieldID bufferCapacityField = NULL;
3273
3274 static jclass lookupOne(JNIEnv* env, const char* name, TRAPS) {
3275 Handle loader; // null (bootstrap) loader
3276 Handle protection_domain; // null protection domain
3277
3278 TempNewSymbol sym = SymbolTable::new_symbol(name, CHECK_NULL);
3279 jclass result = find_class_from_class_loader(env, sym, true, loader, protection_domain, true, CHECK_NULL);
3280
3281 if (log_is_enabled(Info, classresolve) && result != NULL) {
3282 trace_class_resolution(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(result)));
3283 }
3284 return result;
3285 }
3286
3287 // These lookups are done with the NULL (bootstrap) ClassLoader to
3288 // circumvent any security checks that would be done by jni_FindClass.
3289 JNI_ENTRY(bool, lookupDirectBufferClasses(JNIEnv* env))
3290 {
3291 if ((bufferClass = lookupOne(env, "java/nio/Buffer", thread)) == NULL) { return false; }
3292 if ((directBufferClass = lookupOne(env, "sun/nio/ch/DirectBuffer", thread)) == NULL) { return false; }
3293 if ((directByteBufferClass = lookupOne(env, "java/nio/DirectByteBuffer", thread)) == NULL) { return false; }
3294 return true;
3295 }
3296 JNI_END
3297
3298
3299 static bool initializeDirectBufferSupport(JNIEnv* env, JavaThread* thread) {
3300 if (directBufferSupportInitializeFailed) {
3301 return false;
3302 }
3303
3304 if (Atomic::cmpxchg(1, &directBufferSupportInitializeStarted, 0) == 0) {
3305 if (!lookupDirectBufferClasses(env)) {
3306 directBufferSupportInitializeFailed = 1;
3307 return false;
3308 }
3309
3310 // Make global references for these
3311 bufferClass = (jclass) env->NewGlobalRef(bufferClass);
3312 directBufferClass = (jclass) env->NewGlobalRef(directBufferClass);
3313 directByteBufferClass = (jclass) env->NewGlobalRef(directByteBufferClass);
3314
3315 // Get needed field and method IDs
3316 directByteBufferConstructor = env->GetMethodID(directByteBufferClass, "<init>", "(JI)V");
3317 if (env->ExceptionCheck()) {
3318 env->ExceptionClear();
3319 directBufferSupportInitializeFailed = 1;
3320 return false;
3321 }
3322 directBufferAddressField = env->GetFieldID(bufferClass, "address", "J");
3323 if (env->ExceptionCheck()) {
3324 env->ExceptionClear();
3325 directBufferSupportInitializeFailed = 1;
3326 return false;
3327 }
3328 bufferCapacityField = env->GetFieldID(bufferClass, "capacity", "I");
3329 if (env->ExceptionCheck()) {
3330 env->ExceptionClear();
3331 directBufferSupportInitializeFailed = 1;
3332 return false;
3333 }
3334
3335 if ((directByteBufferConstructor == NULL) ||
3336 (directBufferAddressField == NULL) ||
3337 (bufferCapacityField == NULL)) {
3338 directBufferSupportInitializeFailed = 1;
3339 return false;
3340 }
3341
3342 directBufferSupportInitializeEnded = 1;
3343 } else {
3344 while (!directBufferSupportInitializeEnded && !directBufferSupportInitializeFailed) {
3345 os::naked_yield();
3346 }
3347 }
3348
3349 return !directBufferSupportInitializeFailed;
3350 }
3351
3352 extern "C" jobject JNICALL jni_NewDirectByteBuffer(JNIEnv *env, void* address, jlong capacity)
3353 {
3354 // thread_from_jni_environment() will block if VM is gone.
3355 JavaThread* thread = JavaThread::thread_from_jni_environment(env);
3356
3357 JNIWrapper("jni_NewDirectByteBuffer");
3358 HOTSPOT_JNI_NEWDIRECTBYTEBUFFER_ENTRY(env, address, capacity);
3359
3360 if (!directBufferSupportInitializeEnded) {
3361 if (!initializeDirectBufferSupport(env, thread)) {
3362 HOTSPOT_JNI_NEWDIRECTBYTEBUFFER_RETURN(NULL);
3363 return NULL;
3364 }
3365 }
3366
3367 // Being paranoid about accidental sign extension on address
3368 jlong addr = (jlong) ((uintptr_t) address);
3369 // NOTE that package-private DirectByteBuffer constructor currently
3370 // takes int capacity
3371 jint cap = (jint) capacity;
3372 jobject ret = env->NewObject(directByteBufferClass, directByteBufferConstructor, addr, cap);
3373 HOTSPOT_JNI_NEWDIRECTBYTEBUFFER_RETURN(ret);
3374 return ret;
3375 }
3376
3377 DT_RETURN_MARK_DECL(GetDirectBufferAddress, void*
3378 , HOTSPOT_JNI_GETDIRECTBUFFERADDRESS_RETURN((void*) _ret_ref));
3379
3380 extern "C" void* JNICALL jni_GetDirectBufferAddress(JNIEnv *env, jobject buf)
3381 {
3382 // thread_from_jni_environment() will block if VM is gone.
3383 JavaThread* thread = JavaThread::thread_from_jni_environment(env);
3384
3385 JNIWrapper("jni_GetDirectBufferAddress");
3386 HOTSPOT_JNI_GETDIRECTBUFFERADDRESS_ENTRY(env, buf);
3387 void* ret = NULL;
3388 DT_RETURN_MARK(GetDirectBufferAddress, void*, (const void*&)ret);
3389
3390 if (!directBufferSupportInitializeEnded) {
3391 if (!initializeDirectBufferSupport(env, thread)) {
3392 return 0;
3393 }
3394 }
3395
3396 if ((buf != NULL) && (!env->IsInstanceOf(buf, directBufferClass))) {
3397 return 0;
3398 }
3399
3400 ret = (void*)(intptr_t)env->GetLongField(buf, directBufferAddressField);
3401 return ret;
3402 }
3403
3404 DT_RETURN_MARK_DECL(GetDirectBufferCapacity, jlong
3405 , HOTSPOT_JNI_GETDIRECTBUFFERCAPACITY_RETURN(_ret_ref));
3406
3407 extern "C" jlong JNICALL jni_GetDirectBufferCapacity(JNIEnv *env, jobject buf)
3408 {
3409 // thread_from_jni_environment() will block if VM is gone.
3410 JavaThread* thread = JavaThread::thread_from_jni_environment(env);
3411
3412 JNIWrapper("jni_GetDirectBufferCapacity");
3413 HOTSPOT_JNI_GETDIRECTBUFFERCAPACITY_ENTRY(env, buf);
3414 jlong ret = -1;
3415 DT_RETURN_MARK(GetDirectBufferCapacity, jlong, (const jlong&)ret);
3416
3417 if (!directBufferSupportInitializeEnded) {
3418 if (!initializeDirectBufferSupport(env, thread)) {
3419 ret = 0;
3420 return ret;
3421 }
3422 }
3423
3424 if (buf == NULL) {
3425 return -1;
3426 }
3427
3428 if (!env->IsInstanceOf(buf, directBufferClass)) {
3429 return -1;
3430 }
3431
3432 // NOTE that capacity is currently an int in the implementation
3433 ret = env->GetIntField(buf, bufferCapacityField);
3434 return ret;
3435 }
3436
3437
3438 JNI_LEAF(jint, jni_GetVersion(JNIEnv *env))
3439 JNIWrapper("GetVersion");
3440 HOTSPOT_JNI_GETVERSION_ENTRY(env);
3441 HOTSPOT_JNI_GETVERSION_RETURN(CurrentVersion);
3442 return CurrentVersion;
3443 JNI_END
3444
3445 extern struct JavaVM_ main_vm;
3446
3447 JNI_LEAF(jint, jni_GetJavaVM(JNIEnv *env, JavaVM **vm))
3448 JNIWrapper("jni_GetJavaVM");
3449 HOTSPOT_JNI_GETJAVAVM_ENTRY(env, (void **) vm);
3450 *vm = (JavaVM *)(&main_vm);
3451 HOTSPOT_JNI_GETJAVAVM_RETURN(JNI_OK);
3452 return JNI_OK;
3453 JNI_END
3454
3455 // Structure containing all jni functions
3456 struct JNINativeInterface_ jni_NativeInterface = {
3457 NULL,
3458 NULL,
3459 NULL,
3460
3461 NULL,
3462
3463 jni_GetVersion,
3464
3465 jni_DefineClass,
3466 jni_FindClass,
3467
3468 jni_FromReflectedMethod,
3469 jni_FromReflectedField,
3470
3471 jni_ToReflectedMethod,
3472
3473 jni_GetSuperclass,
3474 jni_IsAssignableFrom,
3475
3476 jni_ToReflectedField,
3477
3478 jni_Throw,
3479 jni_ThrowNew,
3480 jni_ExceptionOccurred,
3481 jni_ExceptionDescribe,
3482 jni_ExceptionClear,
3483 jni_FatalError,
3484
3485 jni_PushLocalFrame,
3486 jni_PopLocalFrame,
3487
3488 jni_NewGlobalRef,
3489 jni_DeleteGlobalRef,
3490 jni_DeleteLocalRef,
3491 jni_IsSameObject,
3492
3493 jni_NewLocalRef,
3494 jni_EnsureLocalCapacity,
3495
3496 jni_AllocObject,
3497 jni_NewObject,
3498 jni_NewObjectV,
3499 jni_NewObjectA,
3500
3501 jni_GetObjectClass,
3502 jni_IsInstanceOf,
3503
3504 jni_GetMethodID,
3505
3506 jni_CallObjectMethod,
3507 jni_CallObjectMethodV,
3508 jni_CallObjectMethodA,
3509 jni_CallBooleanMethod,
3510 jni_CallBooleanMethodV,
3511 jni_CallBooleanMethodA,
3512 jni_CallByteMethod,
3513 jni_CallByteMethodV,
3514 jni_CallByteMethodA,
3515 jni_CallCharMethod,
3516 jni_CallCharMethodV,
3517 jni_CallCharMethodA,
3518 jni_CallShortMethod,
3519 jni_CallShortMethodV,
3520 jni_CallShortMethodA,
3521 jni_CallIntMethod,
3522 jni_CallIntMethodV,
3523 jni_CallIntMethodA,
3524 jni_CallLongMethod,
3525 jni_CallLongMethodV,
3526 jni_CallLongMethodA,
3527 jni_CallFloatMethod,
3528 jni_CallFloatMethodV,
3529 jni_CallFloatMethodA,
3530 jni_CallDoubleMethod,
3531 jni_CallDoubleMethodV,
3532 jni_CallDoubleMethodA,
3533 jni_CallVoidMethod,
3534 jni_CallVoidMethodV,
3535 jni_CallVoidMethodA,
3536
3537 jni_CallNonvirtualObjectMethod,
3538 jni_CallNonvirtualObjectMethodV,
3539 jni_CallNonvirtualObjectMethodA,
3540 jni_CallNonvirtualBooleanMethod,
3541 jni_CallNonvirtualBooleanMethodV,
3542 jni_CallNonvirtualBooleanMethodA,
3543 jni_CallNonvirtualByteMethod,
3544 jni_CallNonvirtualByteMethodV,
3545 jni_CallNonvirtualByteMethodA,
3546 jni_CallNonvirtualCharMethod,
3547 jni_CallNonvirtualCharMethodV,
3548 jni_CallNonvirtualCharMethodA,
3549 jni_CallNonvirtualShortMethod,
3550 jni_CallNonvirtualShortMethodV,
3551 jni_CallNonvirtualShortMethodA,
3552 jni_CallNonvirtualIntMethod,
3553 jni_CallNonvirtualIntMethodV,
3554 jni_CallNonvirtualIntMethodA,
3555 jni_CallNonvirtualLongMethod,
3556 jni_CallNonvirtualLongMethodV,
3557 jni_CallNonvirtualLongMethodA,
3558 jni_CallNonvirtualFloatMethod,
3559 jni_CallNonvirtualFloatMethodV,
3560 jni_CallNonvirtualFloatMethodA,
3561 jni_CallNonvirtualDoubleMethod,
3562 jni_CallNonvirtualDoubleMethodV,
3563 jni_CallNonvirtualDoubleMethodA,
3564 jni_CallNonvirtualVoidMethod,
3565 jni_CallNonvirtualVoidMethodV,
3566 jni_CallNonvirtualVoidMethodA,
3567
3568 jni_GetFieldID,
3569
3570 jni_GetObjectField,
3571 jni_GetBooleanField,
3572 jni_GetByteField,
3573 jni_GetCharField,
3574 jni_GetShortField,
3575 jni_GetIntField,
3576 jni_GetLongField,
3577 jni_GetFloatField,
3578 jni_GetDoubleField,
3579
3580 jni_SetObjectField,
3581 jni_SetBooleanField,
3582 jni_SetByteField,
3583 jni_SetCharField,
3584 jni_SetShortField,
3585 jni_SetIntField,
3586 jni_SetLongField,
3587 jni_SetFloatField,
3588 jni_SetDoubleField,
3589
3590 jni_GetStaticMethodID,
3591
3592 jni_CallStaticObjectMethod,
3593 jni_CallStaticObjectMethodV,
3594 jni_CallStaticObjectMethodA,
3595 jni_CallStaticBooleanMethod,
3596 jni_CallStaticBooleanMethodV,
3597 jni_CallStaticBooleanMethodA,
3598 jni_CallStaticByteMethod,
3599 jni_CallStaticByteMethodV,
3600 jni_CallStaticByteMethodA,
3601 jni_CallStaticCharMethod,
3602 jni_CallStaticCharMethodV,
3603 jni_CallStaticCharMethodA,
3604 jni_CallStaticShortMethod,
3605 jni_CallStaticShortMethodV,
3606 jni_CallStaticShortMethodA,
3607 jni_CallStaticIntMethod,
3608 jni_CallStaticIntMethodV,
3609 jni_CallStaticIntMethodA,
3610 jni_CallStaticLongMethod,
3611 jni_CallStaticLongMethodV,
3612 jni_CallStaticLongMethodA,
3613 jni_CallStaticFloatMethod,
3614 jni_CallStaticFloatMethodV,
3615 jni_CallStaticFloatMethodA,
3616 jni_CallStaticDoubleMethod,
3617 jni_CallStaticDoubleMethodV,
3618 jni_CallStaticDoubleMethodA,
3619 jni_CallStaticVoidMethod,
3620 jni_CallStaticVoidMethodV,
3621 jni_CallStaticVoidMethodA,
3622
3623 jni_GetStaticFieldID,
3624
3625 jni_GetStaticObjectField,
3626 jni_GetStaticBooleanField,
3627 jni_GetStaticByteField,
3628 jni_GetStaticCharField,
3629 jni_GetStaticShortField,
3630 jni_GetStaticIntField,
3631 jni_GetStaticLongField,
3632 jni_GetStaticFloatField,
3633 jni_GetStaticDoubleField,
3634
3635 jni_SetStaticObjectField,
3636 jni_SetStaticBooleanField,
3637 jni_SetStaticByteField,
3638 jni_SetStaticCharField,
3639 jni_SetStaticShortField,
3640 jni_SetStaticIntField,
3641 jni_SetStaticLongField,
3642 jni_SetStaticFloatField,
3643 jni_SetStaticDoubleField,
3644
3645 jni_NewString,
3646 jni_GetStringLength,
3647 jni_GetStringChars,
3648 jni_ReleaseStringChars,
3649
3650 jni_NewStringUTF,
3651 jni_GetStringUTFLength,
3652 jni_GetStringUTFChars,
3653 jni_ReleaseStringUTFChars,
3654
3655 jni_GetArrayLength,
3656
3657 jni_NewObjectArray,
3658 jni_GetObjectArrayElement,
3659 jni_SetObjectArrayElement,
3660
3661 jni_NewBooleanArray,
3662 jni_NewByteArray,
3663 jni_NewCharArray,
3664 jni_NewShortArray,
3665 jni_NewIntArray,
3666 jni_NewLongArray,
3667 jni_NewFloatArray,
3668 jni_NewDoubleArray,
3669
3670 jni_GetBooleanArrayElements,
3671 jni_GetByteArrayElements,
3672 jni_GetCharArrayElements,
3673 jni_GetShortArrayElements,
3674 jni_GetIntArrayElements,
3675 jni_GetLongArrayElements,
3676 jni_GetFloatArrayElements,
3677 jni_GetDoubleArrayElements,
3678
3679 jni_ReleaseBooleanArrayElements,
3680 jni_ReleaseByteArrayElements,
3681 jni_ReleaseCharArrayElements,
3682 jni_ReleaseShortArrayElements,
3683 jni_ReleaseIntArrayElements,
3684 jni_ReleaseLongArrayElements,
3685 jni_ReleaseFloatArrayElements,
3686 jni_ReleaseDoubleArrayElements,
3687
3688 jni_GetBooleanArrayRegion,
3689 jni_GetByteArrayRegion,
3690 jni_GetCharArrayRegion,
3691 jni_GetShortArrayRegion,
3692 jni_GetIntArrayRegion,
3693 jni_GetLongArrayRegion,
3694 jni_GetFloatArrayRegion,
3695 jni_GetDoubleArrayRegion,
3696
3697 jni_SetBooleanArrayRegion,
3698 jni_SetByteArrayRegion,
3699 jni_SetCharArrayRegion,
3700 jni_SetShortArrayRegion,
3701 jni_SetIntArrayRegion,
3702 jni_SetLongArrayRegion,
3703 jni_SetFloatArrayRegion,
3704 jni_SetDoubleArrayRegion,
3705
3706 jni_RegisterNatives,
3707 jni_UnregisterNatives,
3708
3709 jni_MonitorEnter,
3710 jni_MonitorExit,
3711
3712 jni_GetJavaVM,
3713
3714 jni_GetStringRegion,
3715 jni_GetStringUTFRegion,
3716
3717 jni_GetPrimitiveArrayCritical,
3718 jni_ReleasePrimitiveArrayCritical,
3719
3720 jni_GetStringCritical,
3721 jni_ReleaseStringCritical,
3722
3723 jni_NewWeakGlobalRef,
3724 jni_DeleteWeakGlobalRef,
3725
3726 jni_ExceptionCheck,
3727
3728 jni_NewDirectByteBuffer,
3729 jni_GetDirectBufferAddress,
3730 jni_GetDirectBufferCapacity,
3731
3732 // New 1_6 features
3733
3734 jni_GetObjectRefType
3735 };
3736
3737
3738 // For jvmti use to modify jni function table.
3739 // Java threads in native contiues to run until it is transitioned
3740 // to VM at safepoint. Before the transition or before it is blocked
3741 // for safepoint it may access jni function table. VM could crash if
3742 // any java thread access the jni function table in the middle of memcpy.
3743 // To avoid this each function pointers are copied automically.
3744 void copy_jni_function_table(const struct JNINativeInterface_ *new_jni_NativeInterface) {
3745 assert(SafepointSynchronize::is_at_safepoint(), "must be at safepoint");
3746 intptr_t *a = (intptr_t *) jni_functions();
3747 intptr_t *b = (intptr_t *) new_jni_NativeInterface;
3748 for (uint i=0; i < sizeof(struct JNINativeInterface_)/sizeof(void *); i++) {
3749 Atomic::store_ptr(*b++, a++);
3750 }
3751 }
3752
3753 void quicken_jni_functions() {
3754 // Replace Get<Primitive>Field with fast versions
3755 if (UseFastJNIAccessors && !JvmtiExport::can_post_field_access()
3756 && !VerifyJNIFields && !CountJNICalls && !CheckJNICalls
3757 #if defined(_WINDOWS) && defined(IA32) && defined(COMPILER2)
3758 // windows x86 currently needs SEH wrapper and the gain of the fast
3759 // versions currently isn't certain for server vm on uniprocessor.
3760 && os::is_MP()
3761 #endif
3762 ) {
3763 address func;
3764 func = JNI_FastGetField::generate_fast_get_boolean_field();
3765 if (func != (address)-1) {
3766 jni_NativeInterface.GetBooleanField = (GetBooleanField_t)func;
3767 }
3768 func = JNI_FastGetField::generate_fast_get_byte_field();
3769 if (func != (address)-1) {
3770 jni_NativeInterface.GetByteField = (GetByteField_t)func;
3771 }
3772 func = JNI_FastGetField::generate_fast_get_char_field();
3773 if (func != (address)-1) {
3774 jni_NativeInterface.GetCharField = (GetCharField_t)func;
3775 }
3776 func = JNI_FastGetField::generate_fast_get_short_field();
3777 if (func != (address)-1) {
3778 jni_NativeInterface.GetShortField = (GetShortField_t)func;
3779 }
3780 func = JNI_FastGetField::generate_fast_get_int_field();
3781 if (func != (address)-1) {
3782 jni_NativeInterface.GetIntField = (GetIntField_t)func;
3783 }
3784 func = JNI_FastGetField::generate_fast_get_long_field();
3785 if (func != (address)-1) {
3786 jni_NativeInterface.GetLongField = (GetLongField_t)func;
3787 }
3788 func = JNI_FastGetField::generate_fast_get_float_field();
3789 if (func != (address)-1) {
3790 jni_NativeInterface.GetFloatField = (GetFloatField_t)func;
3791 }
3792 func = JNI_FastGetField::generate_fast_get_double_field();
3793 if (func != (address)-1) {
3794 jni_NativeInterface.GetDoubleField = (GetDoubleField_t)func;
3795 }
3796 }
3797 }
3798
3799 // Returns the function structure
3800 struct JNINativeInterface_* jni_functions() {
3801 #if INCLUDE_JNI_CHECK
3802 if (CheckJNICalls) return jni_functions_check();
3803 #endif // INCLUDE_JNI_CHECK
3804 return &jni_NativeInterface;
3805 }
3806
3807 // Returns the function structure
3808 struct JNINativeInterface_* jni_functions_nocheck() {
3809 return &jni_NativeInterface;
3810 }
3811
3812
3813 // Invocation API
3814
3815
3816 // Forward declaration
3817 extern const struct JNIInvokeInterface_ jni_InvokeInterface;
3818
3819 // Global invocation API vars
3820 volatile jint vm_created = 0;
3821 // Indicate whether it is safe to recreate VM
3822 volatile jint safe_to_recreate_vm = 1;
3823 struct JavaVM_ main_vm = {&jni_InvokeInterface};
3824
3825
3826 #define JAVASTACKSIZE (400 * 1024) /* Default size of a thread java stack */
3827 enum { VERIFY_NONE, VERIFY_REMOTE, VERIFY_ALL };
3828
3829 DT_RETURN_MARK_DECL(GetDefaultJavaVMInitArgs, jint
3830 , HOTSPOT_JNI_GETDEFAULTJAVAVMINITARGS_RETURN(_ret_ref));
3831
3832 _JNI_IMPORT_OR_EXPORT_ jint JNICALL JNI_GetDefaultJavaVMInitArgs(void *args_) {
3833 HOTSPOT_JNI_GETDEFAULTJAVAVMINITARGS_ENTRY(args_);
3834 JDK1_1InitArgs *args = (JDK1_1InitArgs *)args_;
3835 jint ret = JNI_ERR;
3836 DT_RETURN_MARK(GetDefaultJavaVMInitArgs, jint, (const jint&)ret);
3837
3838 if (Threads::is_supported_jni_version(args->version)) {
3839 ret = JNI_OK;
3840 }
3841 // 1.1 style no longer supported in hotspot.
3842 // According the JNI spec, we should update args->version on return.
3843 // We also use the structure to communicate with launcher about default
3844 // stack size.
3845 if (args->version == JNI_VERSION_1_1) {
3846 args->version = JNI_VERSION_1_2;
3847 // javaStackSize is int in arguments structure
3848 assert(jlong(ThreadStackSize) * K < INT_MAX, "integer overflow");
3849 args->javaStackSize = (jint)(ThreadStackSize * K);
3850 }
3851 return ret;
3852 }
3853
3854 DT_RETURN_MARK_DECL(CreateJavaVM, jint
3855 , HOTSPOT_JNI_CREATEJAVAVM_RETURN(_ret_ref));
3856
3857 static jint JNI_CreateJavaVM_inner(JavaVM **vm, void **penv, void *args) {
3858 HOTSPOT_JNI_CREATEJAVAVM_ENTRY((void **) vm, penv, args);
3859
3860 jint result = JNI_ERR;
3861 DT_RETURN_MARK(CreateJavaVM, jint, (const jint&)result);
3862
3863 // We're about to use Atomic::xchg for synchronization. Some Zero
3864 // platforms use the GCC builtin __sync_lock_test_and_set for this,
3865 // but __sync_lock_test_and_set is not guaranteed to do what we want
3866 // on all architectures. So we check it works before relying on it.
3867 #if defined(ZERO) && defined(ASSERT)
3868 {
3869 jint a = 0xcafebabe;
3870 jint b = Atomic::xchg(0xdeadbeef, &a);
3871 void *c = &a;
3872 void *d = Atomic::xchg_ptr(&b, &c);
3873 assert(a == (jint) 0xdeadbeef && b == (jint) 0xcafebabe, "Atomic::xchg() works");
3874 assert(c == &b && d == &a, "Atomic::xchg_ptr() works");
3875 }
3876 #endif // ZERO && ASSERT
3877
3878 // At the moment it's only possible to have one Java VM,
3879 // since some of the runtime state is in global variables.
3880
3881 // We cannot use our mutex locks here, since they only work on
3882 // Threads. We do an atomic compare and exchange to ensure only
3883 // one thread can call this method at a time
3884
3885 // We use Atomic::xchg rather than Atomic::add/dec since on some platforms
3886 // the add/dec implementations are dependent on whether we are running
3887 // on a multiprocessor, and at this stage of initialization the os::is_MP
3888 // function used to determine this will always return false. Atomic::xchg
3889 // does not have this problem.
3890 if (Atomic::xchg(1, &vm_created) == 1) {
3891 return JNI_EEXIST; // already created, or create attempt in progress
3892 }
3893 if (Atomic::xchg(0, &safe_to_recreate_vm) == 0) {
3894 return JNI_ERR; // someone tried and failed and retry not allowed.
3895 }
3896
3897 assert(vm_created == 1, "vm_created is true during the creation");
3898
3899 /**
3900 * Certain errors during initialization are recoverable and do not
3901 * prevent this method from being called again at a later time
3902 * (perhaps with different arguments). However, at a certain
3903 * point during initialization if an error occurs we cannot allow
3904 * this function to be called again (or it will crash). In those
3905 * situations, the 'canTryAgain' flag is set to false, which atomically
3906 * sets safe_to_recreate_vm to 1, such that any new call to
3907 * JNI_CreateJavaVM will immediately fail using the above logic.
3908 */
3909 bool can_try_again = true;
3910
3911 result = Threads::create_vm((JavaVMInitArgs*) args, &can_try_again);
3912 if (result == JNI_OK) {
3913 JavaThread *thread = JavaThread::current();
3914 assert(!thread->has_pending_exception(), "should have returned not OK");
3915 /* thread is thread_in_vm here */
3916 *vm = (JavaVM *)(&main_vm);
3917 *(JNIEnv**)penv = thread->jni_environment();
3918
3919 #if INCLUDE_JVMCI
3920 if (EnableJVMCI) {
3921 if (UseJVMCICompiler) {
3922 // JVMCI is initialized on a CompilerThread
3923 if (BootstrapJVMCI) {
3924 JavaThread* THREAD = thread;
3925 JVMCICompiler* compiler = JVMCICompiler::instance(CATCH);
3926 compiler->bootstrap();
3927 }
3928 }
3929 }
3930 #endif
3931
3932 // Tracks the time application was running before GC
3933 RuntimeService::record_application_start();
3934
3935 // Notify JVMTI
3936 if (JvmtiExport::should_post_thread_life()) {
3937 JvmtiExport::post_thread_start(thread);
3938 }
3939
3940 EventThreadStart event;
3941 if (event.should_commit()) {
3942 event.set_javalangthread(java_lang_Thread::thread_id(thread->threadObj()));
3943 event.commit();
3944 }
3945
3946 #ifndef PRODUCT
3947 // Check if we should compile all classes on bootclasspath
3948 if (CompileTheWorld) ClassLoader::compile_the_world();
3949 if (ReplayCompiles) ciReplay::replay(thread);
3950
3951 // Some platforms (like Win*) need a wrapper around these test
3952 // functions in order to properly handle error conditions.
3953 test_error_handler();
3954 if (ExecuteInternalVMTests) {
3955 InternalVMTests::run();
3956 }
3957 #endif
3958
3959 // Since this is not a JVM_ENTRY we have to set the thread state manually before leaving.
3960 ThreadStateTransition::transition_and_fence(thread, _thread_in_vm, _thread_in_native);
3961 } else {
3962 // If create_vm exits because of a pending exception, exit with that
3963 // exception. In the future when we figure out how to reclaim memory,
3964 // we may be able to exit with JNI_ERR and allow the calling application
3965 // to continue.
3966 if (Universe::is_fully_initialized()) {
3967 // otherwise no pending exception possible - VM will already have aborted
3968 JavaThread* THREAD = JavaThread::current();
3969 if (HAS_PENDING_EXCEPTION) {
3970 HandleMark hm;
3971 vm_exit_during_initialization(Handle(THREAD, PENDING_EXCEPTION));
3972 }
3973 }
3974
3975 if (can_try_again) {
3976 // reset safe_to_recreate_vm to 1 so that retrial would be possible
3977 safe_to_recreate_vm = 1;
3978 }
3979
3980 // Creation failed. We must reset vm_created
3981 *vm = 0;
3982 *(JNIEnv**)penv = 0;
3983 // reset vm_created last to avoid race condition. Use OrderAccess to
3984 // control both compiler and architectural-based reordering.
3985 OrderAccess::release_store(&vm_created, 0);
3986 }
3987
3988 // Flush stdout and stderr before exit.
3989 fflush(stdout);
3990 fflush(stderr);
3991
3992 return result;
3993
3994 }
3995
3996 _JNI_IMPORT_OR_EXPORT_ jint JNICALL JNI_CreateJavaVM(JavaVM **vm, void **penv, void *args) {
3997 jint result = 0;
3998 // On Windows, let CreateJavaVM run with SEH protection
3999 #ifdef _WIN32
4000 __try {
4001 #endif
4002 result = JNI_CreateJavaVM_inner(vm, penv, args);
4003 #ifdef _WIN32
4004 } __except(topLevelExceptionFilter((_EXCEPTION_POINTERS*)_exception_info())) {
4005 // Nothing to do.
4006 }
4007 #endif
4008 return result;
4009 }
4010
4011 _JNI_IMPORT_OR_EXPORT_ jint JNICALL JNI_GetCreatedJavaVMs(JavaVM **vm_buf, jsize bufLen, jsize *numVMs) {
4012 // See bug 4367188, the wrapper can sometimes cause VM crashes
4013 // JNIWrapper("GetCreatedJavaVMs");
4014
4015 HOTSPOT_JNI_GETCREATEDJAVAVMS_ENTRY((void **) vm_buf, bufLen, (uintptr_t *) numVMs);
4016
4017 if (vm_created) {
4018 if (numVMs != NULL) *numVMs = 1;
4019 if (bufLen > 0) *vm_buf = (JavaVM *)(&main_vm);
4020 } else {
4021 if (numVMs != NULL) *numVMs = 0;
4022 }
4023 HOTSPOT_JNI_GETCREATEDJAVAVMS_RETURN(JNI_OK);
4024 return JNI_OK;
4025 }
4026
4027 extern "C" {
4028
4029 DT_RETURN_MARK_DECL(DestroyJavaVM, jint
4030 , HOTSPOT_JNI_DESTROYJAVAVM_RETURN(_ret_ref));
4031
4032 jint JNICALL jni_DestroyJavaVM(JavaVM *vm) {
4033 HOTSPOT_JNI_DESTROYJAVAVM_ENTRY(vm);
4034 jint res = JNI_ERR;
4035 DT_RETURN_MARK(DestroyJavaVM, jint, (const jint&)res);
4036
4037 if (!vm_created) {
4038 res = JNI_ERR;
4039 return res;
4040 }
4041
4042 JNIWrapper("DestroyJavaVM");
4043 JNIEnv *env;
4044 JavaVMAttachArgs destroyargs;
4045 destroyargs.version = CurrentVersion;
4046 destroyargs.name = (char *)"DestroyJavaVM";
4047 destroyargs.group = NULL;
4048 res = vm->AttachCurrentThread((void **)&env, (void *)&destroyargs);
4049 if (res != JNI_OK) {
4050 return res;
4051 }
4052
4053 // Since this is not a JVM_ENTRY we have to set the thread state manually before entering.
4054 JavaThread* thread = JavaThread::current();
4055 ThreadStateTransition::transition_from_native(thread, _thread_in_vm);
4056 if (Threads::destroy_vm()) {
4057 // Should not change thread state, VM is gone
4058 vm_created = false;
4059 res = JNI_OK;
4060 return res;
4061 } else {
4062 ThreadStateTransition::transition_and_fence(thread, _thread_in_vm, _thread_in_native);
4063 res = JNI_ERR;
4064 return res;
4065 }
4066 }
4067
4068
4069 static jint attach_current_thread(JavaVM *vm, void **penv, void *_args, bool daemon) {
4070 JavaVMAttachArgs *args = (JavaVMAttachArgs *) _args;
4071
4072 // Check below commented out from JDK1.2fcs as well
4073 /*
4074 if (args && (args->version != JNI_VERSION_1_1 || args->version != JNI_VERSION_1_2)) {
4075 return JNI_EVERSION;
4076 }
4077 */
4078
4079 Thread* t = Thread::current_or_null();
4080 if (t != NULL) {
4081 // If the thread has been attached this operation is a no-op
4082 *(JNIEnv**)penv = ((JavaThread*) t)->jni_environment();
4083 return JNI_OK;
4084 }
4085
4086 // Create a thread and mark it as attaching so it will be skipped by the
4087 // ThreadsListEnumerator - see CR 6404306
4088 JavaThread* thread = new JavaThread(true);
4089
4090 // Set correct safepoint info. The thread is going to call into Java when
4091 // initializing the Java level thread object. Hence, the correct state must
4092 // be set in order for the Safepoint code to deal with it correctly.
4093 thread->set_thread_state(_thread_in_vm);
4094 thread->record_stack_base_and_size();
4095 thread->initialize_thread_current();
4096
4097 if (!os::create_attached_thread(thread)) {
4098 delete thread;
4099 return JNI_ERR;
4100 }
4101 // Enable stack overflow checks
4102 thread->create_stack_guard_pages();
4103
4104 thread->initialize_tlab();
4105
4106 thread->cache_global_variables();
4107
4108 // Crucial that we do not have a safepoint check for this thread, since it has
4109 // not been added to the Thread list yet.
4110 { Threads_lock->lock_without_safepoint_check();
4111 // This must be inside this lock in order to get FullGCALot to work properly, i.e., to
4112 // avoid this thread trying to do a GC before it is added to the thread-list
4113 thread->set_active_handles(JNIHandleBlock::allocate_block());
4114 Threads::add(thread, daemon);
4115 Threads_lock->unlock();
4116 }
4117 // Create thread group and name info from attach arguments
4118 oop group = NULL;
4119 char* thread_name = NULL;
4120 if (args != NULL && Threads::is_supported_jni_version(args->version)) {
4121 group = JNIHandles::resolve(args->group);
4122 thread_name = args->name; // may be NULL
4123 }
4124 if (group == NULL) group = Universe::main_thread_group();
4125
4126 // Create Java level thread object and attach it to this thread
4127 bool attach_failed = false;
4128 {
4129 EXCEPTION_MARK;
4130 HandleMark hm(THREAD);
4131 Handle thread_group(THREAD, group);
4132 thread->allocate_threadObj(thread_group, thread_name, daemon, THREAD);
4133 if (HAS_PENDING_EXCEPTION) {
4134 CLEAR_PENDING_EXCEPTION;
4135 // cleanup outside the handle mark.
4136 attach_failed = true;
4137 }
4138 }
4139
4140 if (attach_failed) {
4141 // Added missing cleanup
4142 thread->cleanup_failed_attach_current_thread();
4143 return JNI_ERR;
4144 }
4145
4146 // mark the thread as no longer attaching
4147 // this uses a fence to push the change through so we don't have
4148 // to regrab the threads_lock
4149 thread->set_done_attaching_via_jni();
4150
4151 // Set java thread status.
4152 java_lang_Thread::set_thread_status(thread->threadObj(),
4153 java_lang_Thread::RUNNABLE);
4154
4155 // Notify the debugger
4156 if (JvmtiExport::should_post_thread_life()) {
4157 JvmtiExport::post_thread_start(thread);
4158 }
4159
4160 EventThreadStart event;
4161 if (event.should_commit()) {
4162 event.set_javalangthread(java_lang_Thread::thread_id(thread->threadObj()));
4163 event.commit();
4164 }
4165
4166 *(JNIEnv**)penv = thread->jni_environment();
4167
4168 // Now leaving the VM, so change thread_state. This is normally automatically taken care
4169 // of in the JVM_ENTRY. But in this situation we have to do it manually. Notice, that by
4170 // using ThreadStateTransition::transition, we do a callback to the safepoint code if
4171 // needed.
4172
4173 ThreadStateTransition::transition_and_fence(thread, _thread_in_vm, _thread_in_native);
4174
4175 // Perform any platform dependent FPU setup
4176 os::setup_fpu();
4177
4178 return JNI_OK;
4179 }
4180
4181
4182 jint JNICALL jni_AttachCurrentThread(JavaVM *vm, void **penv, void *_args) {
4183 HOTSPOT_JNI_ATTACHCURRENTTHREAD_ENTRY(vm, penv, _args);
4184 if (!vm_created) {
4185 HOTSPOT_JNI_ATTACHCURRENTTHREAD_RETURN((uint32_t) JNI_ERR);
4186 return JNI_ERR;
4187 }
4188
4189 JNIWrapper("AttachCurrentThread");
4190 jint ret = attach_current_thread(vm, penv, _args, false);
4191 HOTSPOT_JNI_ATTACHCURRENTTHREAD_RETURN(ret);
4192 return ret;
4193 }
4194
4195
4196 jint JNICALL jni_DetachCurrentThread(JavaVM *vm) {
4197 HOTSPOT_JNI_DETACHCURRENTTHREAD_ENTRY(vm);
4198 VM_Exit::block_if_vm_exited();
4199
4200 JNIWrapper("DetachCurrentThread");
4201
4202 // If the thread has already been detached the operation is a no-op
4203 if (Thread::current_or_null() == NULL) {
4204 HOTSPOT_JNI_DETACHCURRENTTHREAD_RETURN(JNI_OK);
4205 return JNI_OK;
4206 }
4207
4208 JavaThread* thread = JavaThread::current();
4209 if (thread->has_last_Java_frame()) {
4210 HOTSPOT_JNI_DETACHCURRENTTHREAD_RETURN((uint32_t) JNI_ERR);
4211 // Can't detach a thread that's running java, that can't work.
4212 return JNI_ERR;
4213 }
4214
4215 // Safepoint support. Have to do call-back to safepoint code, if in the
4216 // middel of a safepoint operation
4217 ThreadStateTransition::transition_from_native(thread, _thread_in_vm);
4218
4219 // XXX: Note that JavaThread::exit() call below removes the guards on the
4220 // stack pages set up via enable_stack_{red,yellow}_zone() calls
4221 // above in jni_AttachCurrentThread. Unfortunately, while the setting
4222 // of the guards is visible in jni_AttachCurrentThread above,
4223 // the removal of the guards is buried below in JavaThread::exit()
4224 // here. The abstraction should be more symmetrically either exposed
4225 // or hidden (e.g. it could probably be hidden in the same
4226 // (platform-dependent) methods where we do alternate stack
4227 // maintenance work?)
4228 thread->exit(false, JavaThread::jni_detach);
4229 delete thread;
4230
4231 HOTSPOT_JNI_DETACHCURRENTTHREAD_RETURN(JNI_OK);
4232 return JNI_OK;
4233 }
4234
4235 DT_RETURN_MARK_DECL(GetEnv, jint
4236 , HOTSPOT_JNI_GETENV_RETURN(_ret_ref));
4237
4238 jint JNICALL jni_GetEnv(JavaVM *vm, void **penv, jint version) {
4239 HOTSPOT_JNI_GETENV_ENTRY(vm, penv, version);
4240 jint ret = JNI_ERR;
4241 DT_RETURN_MARK(GetEnv, jint, (const jint&)ret);
4242
4243 if (!vm_created) {
4244 *penv = NULL;
4245 ret = JNI_EDETACHED;
4246 return ret;
4247 }
4248
4249 if (JniExportedInterface::GetExportedInterface(vm, penv, version, &ret)) {
4250 return ret;
4251 }
4252
4253 #ifndef JVMPI_VERSION_1
4254 // need these in order to be polite about older agents
4255 #define JVMPI_VERSION_1 ((jint)0x10000001)
4256 #define JVMPI_VERSION_1_1 ((jint)0x10000002)
4257 #define JVMPI_VERSION_1_2 ((jint)0x10000003)
4258 #endif // !JVMPI_VERSION_1
4259
4260 Thread* thread = Thread::current_or_null();
4261 if (thread != NULL && thread->is_Java_thread()) {
4262 if (Threads::is_supported_jni_version_including_1_1(version)) {
4263 *(JNIEnv**)penv = ((JavaThread*) thread)->jni_environment();
4264 ret = JNI_OK;
4265 return ret;
4266
4267 } else if (version == JVMPI_VERSION_1 ||
4268 version == JVMPI_VERSION_1_1 ||
4269 version == JVMPI_VERSION_1_2) {
4270 tty->print_cr("ERROR: JVMPI, an experimental interface, is no longer supported.");
4271 tty->print_cr("Please use the supported interface: the JVM Tool Interface (JVM TI).");
4272 ret = JNI_EVERSION;
4273 return ret;
4274 } else if (JvmtiExport::is_jvmdi_version(version)) {
4275 tty->print_cr("FATAL ERROR: JVMDI is no longer supported.");
4276 tty->print_cr("Please use the supported interface: the JVM Tool Interface (JVM TI).");
4277 ret = JNI_EVERSION;
4278 return ret;
4279 } else {
4280 *penv = NULL;
4281 ret = JNI_EVERSION;
4282 return ret;
4283 }
4284 } else {
4285 *penv = NULL;
4286 ret = JNI_EDETACHED;
4287 return ret;
4288 }
4289 }
4290
4291
4292 jint JNICALL jni_AttachCurrentThreadAsDaemon(JavaVM *vm, void **penv, void *_args) {
4293 HOTSPOT_JNI_ATTACHCURRENTTHREADASDAEMON_ENTRY(vm, penv, _args);
4294 if (!vm_created) {
4295 HOTSPOT_JNI_ATTACHCURRENTTHREADASDAEMON_RETURN((uint32_t) JNI_ERR);
4296 return JNI_ERR;
4297 }
4298
4299 JNIWrapper("AttachCurrentThreadAsDaemon");
4300 jint ret = attach_current_thread(vm, penv, _args, true);
4301 HOTSPOT_JNI_ATTACHCURRENTTHREADASDAEMON_RETURN(ret);
4302 return ret;
4303 }
4304
4305
4306 } // End extern "C"
4307
4308 const struct JNIInvokeInterface_ jni_InvokeInterface = {
4309 NULL,
4310 NULL,
4311 NULL,
4312
4313 jni_DestroyJavaVM,
4314 jni_AttachCurrentThread,
4315 jni_DetachCurrentThread,
4316 jni_GetEnv,
4317 jni_AttachCurrentThreadAsDaemon
4318 };