1 /*
2 * Copyright (c) 1997, 2015, 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/classLoader.hpp"
30 #include "classfile/javaClasses.hpp"
31 #include "classfile/symbolTable.hpp"
32 #include "classfile/systemDictionary.hpp"
33 #include "classfile/vmSymbols.hpp"
34 #include "gc/shared/gcLocker.inline.hpp"
35 #include "interpreter/linkResolver.hpp"
36 #include "memory/allocation.hpp"
37 #include "memory/allocation.inline.hpp"
38 #include "memory/oopFactory.hpp"
39 #include "memory/universe.inline.hpp"
40 #include "oops/instanceKlass.hpp"
41 #include "oops/instanceOop.hpp"
42 #include "oops/markOop.hpp"
43 #include "oops/method.hpp"
44 #include "oops/objArrayKlass.hpp"
45 #include "oops/objArrayOop.inline.hpp"
46 #include "oops/oop.inline.hpp"
47 #include "oops/symbol.hpp"
48 #include "oops/typeArrayKlass.hpp"
49 #include "oops/typeArrayOop.hpp"
50 #include "prims/jni.h"
51 #include "prims/jniCheck.hpp"
52 #include "prims/jniExport.hpp"
53 #include "prims/jniFastGetField.hpp"
54 #include "prims/jvm.h"
55 #include "prims/jvm_misc.hpp"
56 #include "prims/jvmtiExport.hpp"
57 #include "prims/jvmtiThreadState.hpp"
58 #include "runtime/atomic.inline.hpp"
59 #include "runtime/compilationPolicy.hpp"
60 #include "runtime/fieldDescriptor.hpp"
61 #include "runtime/fprofiler.hpp"
62 #include "runtime/handles.inline.hpp"
63 #include "runtime/interfaceSupport.hpp"
64 #include "runtime/java.hpp"
65 #include "runtime/javaCalls.hpp"
66 #include "runtime/jfieldIDWorkaround.hpp"
67 #include "runtime/orderAccess.inline.hpp"
68 #include "runtime/reflection.hpp"
69 #include "runtime/sharedRuntime.hpp"
70 #include "runtime/signature.hpp"
71 #include "runtime/thread.inline.hpp"
72 #include "runtime/vm_operations.hpp"
73 #include "services/memTracker.hpp"
74 #include "services/runtimeService.hpp"
75 #include "trace/tracing.hpp"
76 #include "utilities/defaultStream.hpp"
77 #include "utilities/dtrace.hpp"
78 #include "utilities/events.hpp"
79 #include "utilities/histogram.hpp"
80 #include "utilities/macros.hpp"
81 #if INCLUDE_ALL_GCS
82 #include "gc/g1/g1SATBCardTableModRefBS.hpp"
83 #endif // INCLUDE_ALL_GCS
84
85 static jint CurrentVersion = JNI_VERSION_1_8;
86
87 #ifdef _WIN32
88 extern LONG WINAPI topLevelExceptionFilter(_EXCEPTION_POINTERS* );
89 #endif
90
91 // The DT_RETURN_MARK macros create a scoped object to fire the dtrace
92 // '-return' probe regardless of the return path is taken out of the function.
93 // Methods that have multiple return paths use this to avoid having to
94 // instrument each return path. Methods that use CHECK or THROW must use this
95 // since those macros can cause an immedate uninstrumented return.
96 //
97 // In order to get the return value, a reference to the variable containing
98 // the return value must be passed to the contructor of the object, and
99 // the return value must be set before return (since the mark object has
100 // a reference to it).
101 //
102 // Example:
103 // DT_RETURN_MARK_DECL(SomeFunc, int);
104 // JNI_ENTRY(int, SomeFunc, ...)
105 // int return_value = 0;
106 // DT_RETURN_MARK(SomeFunc, int, (const int&)return_value);
107 // foo(CHECK_0)
108 // return_value = 5;
109 // return return_value;
110 // JNI_END
111 #define DT_RETURN_MARK_DECL(name, type, probe) \
112 DTRACE_ONLY( \
113 class DTraceReturnProbeMark_##name { \
114 public: \
115 const type& _ret_ref; \
116 DTraceReturnProbeMark_##name(const type& v) : _ret_ref(v) {} \
117 ~DTraceReturnProbeMark_##name() { \
118 probe; \
119 } \
120 } \
121 )
122 // Void functions are simpler since there's no return value
123 #define DT_VOID_RETURN_MARK_DECL(name, probe) \
124 DTRACE_ONLY( \
125 class DTraceReturnProbeMark_##name { \
126 public: \
127 ~DTraceReturnProbeMark_##name() { \
128 probe; \
129 } \
130 } \
131 )
132
133 // Place these macros in the function to mark the return. Non-void
134 // functions need the type and address of the return value.
135 #define DT_RETURN_MARK(name, type, ref) \
136 DTRACE_ONLY( DTraceReturnProbeMark_##name dtrace_return_mark(ref) )
137 #define DT_VOID_RETURN_MARK(name) \
138 DTRACE_ONLY( DTraceReturnProbeMark_##name dtrace_return_mark )
139
140
141 // Use these to select distinct code for floating-point vs. non-floating point
142 // situations. Used from within common macros where we need slightly
143 // different behavior for Float/Double
144 #define FP_SELECT_Boolean(intcode, fpcode) intcode
145 #define FP_SELECT_Byte(intcode, fpcode) intcode
146 #define FP_SELECT_Char(intcode, fpcode) intcode
147 #define FP_SELECT_Short(intcode, fpcode) intcode
148 #define FP_SELECT_Object(intcode, fpcode) intcode
149 #define FP_SELECT_Int(intcode, fpcode) intcode
150 #define FP_SELECT_Long(intcode, fpcode) intcode
151 #define FP_SELECT_Float(intcode, fpcode) fpcode
152 #define FP_SELECT_Double(intcode, fpcode) fpcode
153 #define FP_SELECT(TypeName, intcode, fpcode) \
154 FP_SELECT_##TypeName(intcode, fpcode)
155
156 #define COMMA ,
157
158 // Choose DT_RETURN_MARK macros based on the type: float/double -> void
159 // (dtrace doesn't do FP yet)
160 #define DT_RETURN_MARK_DECL_FOR(TypeName, name, type, probe) \
161 FP_SELECT(TypeName, \
162 DT_RETURN_MARK_DECL(name, type, probe), DT_VOID_RETURN_MARK_DECL(name, probe) )
163 #define DT_RETURN_MARK_FOR(TypeName, name, type, ref) \
164 FP_SELECT(TypeName, \
165 DT_RETURN_MARK(name, type, ref), DT_VOID_RETURN_MARK(name) )
166
167
168 // out-of-line helpers for class jfieldIDWorkaround:
169
170 bool jfieldIDWorkaround::is_valid_jfieldID(Klass* k, jfieldID id) {
171 if (jfieldIDWorkaround::is_instance_jfieldID(k, id)) {
172 uintptr_t as_uint = (uintptr_t) id;
173 intptr_t offset = raw_instance_offset(id);
174 if (is_checked_jfieldID(id)) {
175 if (!klass_hash_ok(k, id)) {
176 return false;
177 }
178 }
179 return InstanceKlass::cast(k)->contains_field_offset(offset);
180 } else {
181 JNIid* result = (JNIid*) id;
182 #ifdef ASSERT
183 return result != NULL && result->is_static_field_id();
184 #else
185 return result != NULL;
186 #endif
187 }
188 }
189
190
191 intptr_t jfieldIDWorkaround::encode_klass_hash(Klass* k, intptr_t offset) {
192 if (offset <= small_offset_mask) {
193 Klass* field_klass = k;
194 Klass* super_klass = field_klass->super();
195 // With compressed oops the most super class with nonstatic fields would
196 // be the owner of fields embedded in the header.
197 while (InstanceKlass::cast(super_klass)->has_nonstatic_fields() &&
198 InstanceKlass::cast(super_klass)->contains_field_offset(offset)) {
199 field_klass = super_klass; // super contains the field also
200 super_klass = field_klass->super();
201 }
202 debug_only(No_Safepoint_Verifier nosafepoint;)
203 uintptr_t klass_hash = field_klass->identity_hash();
204 return ((klass_hash & klass_mask) << klass_shift) | checked_mask_in_place;
205 } else {
206 #if 0
207 #ifndef PRODUCT
208 {
209 ResourceMark rm;
210 warning("VerifyJNIFields: long offset %d in %s", offset, k->external_name());
211 }
212 #endif
213 #endif
214 return 0;
215 }
216 }
217
218 bool jfieldIDWorkaround::klass_hash_ok(Klass* k, jfieldID id) {
219 uintptr_t as_uint = (uintptr_t) id;
220 intptr_t klass_hash = (as_uint >> klass_shift) & klass_mask;
221 do {
222 debug_only(No_Safepoint_Verifier nosafepoint;)
223 // Could use a non-blocking query for identity_hash here...
224 if ((k->identity_hash() & klass_mask) == klass_hash)
225 return true;
226 k = k->super();
227 } while (k != NULL);
228 return false;
229 }
230
231 void jfieldIDWorkaround::verify_instance_jfieldID(Klass* k, jfieldID id) {
232 guarantee(jfieldIDWorkaround::is_instance_jfieldID(k, id), "must be an instance field" );
233 uintptr_t as_uint = (uintptr_t) id;
234 intptr_t offset = raw_instance_offset(id);
235 if (VerifyJNIFields) {
236 if (is_checked_jfieldID(id)) {
237 guarantee(klass_hash_ok(k, id),
238 "Bug in native code: jfieldID class must match object");
239 } else {
240 #if 0
241 #ifndef PRODUCT
242 if (Verbose) {
243 ResourceMark rm;
244 warning("VerifyJNIFields: unverified offset %d for %s", offset, k->external_name());
245 }
246 #endif
247 #endif
248 }
249 }
250 guarantee(InstanceKlass::cast(k)->contains_field_offset(offset),
251 "Bug in native code: jfieldID offset must address interior of object");
252 }
253
254 // Wrapper to trace JNI functions
255
256 #ifdef ASSERT
257 Histogram* JNIHistogram;
258 static volatile jint JNIHistogram_lock = 0;
259
260 class JNITraceWrapper : public StackObj {
261 public:
262 JNITraceWrapper(const char* format, ...) ATTRIBUTE_PRINTF(2, 3) {
263 if (TraceJNICalls) {
264 va_list ap;
265 va_start(ap, format);
266 tty->print("JNI ");
267 tty->vprint_cr(format, ap);
268 va_end(ap);
269 }
270 }
271 };
272
273 class JNIHistogramElement : public HistogramElement {
274 public:
275 JNIHistogramElement(const char* name);
276 };
277
278 JNIHistogramElement::JNIHistogramElement(const char* elementName) {
279 _name = elementName;
280 uintx count = 0;
281
282 while (Atomic::cmpxchg(1, &JNIHistogram_lock, 0) != 0) {
283 while (OrderAccess::load_acquire(&JNIHistogram_lock) != 0) {
284 count +=1;
285 if ( (WarnOnStalledSpinLock > 0)
286 && (count % WarnOnStalledSpinLock == 0)) {
287 warning("JNIHistogram_lock seems to be stalled");
288 }
289 }
290 }
291
292
293 if(JNIHistogram == NULL)
294 JNIHistogram = new Histogram("JNI Call Counts",100);
295
296 JNIHistogram->add_element(this);
297 Atomic::dec(&JNIHistogram_lock);
298 }
299
300 #define JNICountWrapper(arg) \
301 static JNIHistogramElement* e = new JNIHistogramElement(arg); \
302 /* There is a MT-race condition in VC++. So we need to make sure that that e has been initialized */ \
303 if (e != NULL) e->increment_count()
304 #define JNIWrapper(arg) JNICountWrapper(arg); JNITraceWrapper(arg)
305 #else
306 #define JNIWrapper(arg)
307 #endif
308
309
310 // Implementation of JNI entries
311
312 DT_RETURN_MARK_DECL(DefineClass, jclass
313 , HOTSPOT_JNI_DEFINECLASS_RETURN(_ret_ref));
314
315 JNI_ENTRY(jclass, jni_DefineClass(JNIEnv *env, const char *name, jobject loaderRef,
316 const jbyte *buf, jsize bufLen))
317 JNIWrapper("DefineClass");
318
319 HOTSPOT_JNI_DEFINECLASS_ENTRY(
320 env, (char*) name, loaderRef, (char*) buf, bufLen);
321
322 jclass cls = NULL;
323 DT_RETURN_MARK(DefineClass, jclass, (const jclass&)cls);
324
325 TempNewSymbol class_name = NULL;
326 // Since exceptions can be thrown, class initialization can take place
327 // if name is NULL no check for class name in .class stream has to be made.
328 if (name != NULL) {
329 const int str_len = (int)strlen(name);
330 if (str_len > Symbol::max_length()) {
331 // It's impossible to create this class; the name cannot fit
332 // into the constant pool.
333 THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), name);
334 }
335 class_name = SymbolTable::new_symbol(name, CHECK_NULL);
336 }
337 ResourceMark rm(THREAD);
338 ClassFileStream st((u1*) buf, bufLen, NULL);
339 Handle class_loader (THREAD, JNIHandles::resolve(loaderRef));
340
341 if (UsePerfData && !class_loader.is_null()) {
342 // check whether the current caller thread holds the lock or not.
343 // If not, increment the corresponding counter
344 if (ObjectSynchronizer::
345 query_lock_ownership((JavaThread*)THREAD, class_loader) !=
346 ObjectSynchronizer::owner_self) {
347 ClassLoader::sync_JNIDefineClassLockFreeCounter()->inc();
348 }
349 }
350 Klass* k = SystemDictionary::resolve_from_stream(class_name, class_loader,
351 Handle(), &st, true,
352 CHECK_NULL);
353
354 if (TraceClassResolution && k != NULL) {
355 trace_class_resolution(k);
356 }
357
358 cls = (jclass)JNIHandles::make_local(
359 env, k->java_mirror());
360 return cls;
361 JNI_END
362
363
364
365 static bool first_time_FindClass = true;
366
367 DT_RETURN_MARK_DECL(FindClass, jclass
368 , HOTSPOT_JNI_FINDCLASS_RETURN(_ret_ref));
369
370 JNI_ENTRY(jclass, jni_FindClass(JNIEnv *env, const char *name))
371 JNIWrapper("FindClass");
372
373 HOTSPOT_JNI_FINDCLASS_ENTRY(env, (char *)name);
374
375 jclass result = NULL;
376 DT_RETURN_MARK(FindClass, jclass, (const jclass&)result);
377
378 // Remember if we are the first invocation of jni_FindClass
379 bool first_time = first_time_FindClass;
380 first_time_FindClass = false;
381
382 // Sanity check the name: it cannot be null or larger than the maximum size
383 // name we can fit in the constant pool.
384 if (name == NULL || (int)strlen(name) > Symbol::max_length()) {
385 THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), name);
386 }
387
388 //%note jni_3
389 Handle loader;
390 Handle protection_domain;
391 // Find calling class
392 instanceKlassHandle k (THREAD, thread->security_get_caller_class(0));
393 if (k.not_null()) {
394 loader = Handle(THREAD, k->class_loader());
395 // Special handling to make sure JNI_OnLoad and JNI_OnUnload are executed
396 // in the correct class context.
397 if (loader.is_null() &&
398 k->name() == vmSymbols::java_lang_ClassLoader_NativeLibrary()) {
399 JavaValue result(T_OBJECT);
400 JavaCalls::call_static(&result, k,
401 vmSymbols::getFromClass_name(),
402 vmSymbols::void_class_signature(),
403 thread);
404 if (HAS_PENDING_EXCEPTION) {
405 Handle ex(thread, thread->pending_exception());
406 CLEAR_PENDING_EXCEPTION;
407 THROW_HANDLE_0(ex);
408 }
409 oop mirror = (oop) result.get_jobject();
410 loader = Handle(THREAD,
411 InstanceKlass::cast(java_lang_Class::as_Klass(mirror))->class_loader());
412 protection_domain = Handle(THREAD,
413 InstanceKlass::cast(java_lang_Class::as_Klass(mirror))->protection_domain());
414 }
415 } else {
416 // We call ClassLoader.getSystemClassLoader to obtain the system class loader.
417 loader = Handle(THREAD, SystemDictionary::java_system_loader());
418 }
419
420 TempNewSymbol sym = SymbolTable::new_symbol(name, CHECK_NULL);
421 result = find_class_from_class_loader(env, sym, true, loader,
422 protection_domain, true, thread);
423
424 if (TraceClassResolution && result != NULL) {
425 trace_class_resolution(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(result)));
426 }
427
428 // If we were the first invocation of jni_FindClass, we enable compilation again
429 // rather than just allowing invocation counter to overflow and decay.
430 // Controlled by flag DelayCompilationDuringStartup.
431 if (first_time && !CompileTheWorld)
432 CompilationPolicy::completed_vm_startup();
433
434 return result;
435 JNI_END
436
437 DT_RETURN_MARK_DECL(FromReflectedMethod, jmethodID
438 , HOTSPOT_JNI_FROMREFLECTEDMETHOD_RETURN((uintptr_t)_ret_ref));
439
440 JNI_ENTRY(jmethodID, jni_FromReflectedMethod(JNIEnv *env, jobject method))
441 JNIWrapper("FromReflectedMethod");
442
443 HOTSPOT_JNI_FROMREFLECTEDMETHOD_ENTRY(env, method);
444
445 jmethodID ret = NULL;
446 DT_RETURN_MARK(FromReflectedMethod, jmethodID, (const jmethodID&)ret);
447
448 // method is a handle to a java.lang.reflect.Method object
449 oop reflected = JNIHandles::resolve_non_null(method);
450 oop mirror = NULL;
451 int slot = 0;
452
453 if (reflected->klass() == SystemDictionary::reflect_Constructor_klass()) {
454 mirror = java_lang_reflect_Constructor::clazz(reflected);
455 slot = java_lang_reflect_Constructor::slot(reflected);
456 } else {
457 assert(reflected->klass() == SystemDictionary::reflect_Method_klass(), "wrong type");
458 mirror = java_lang_reflect_Method::clazz(reflected);
459 slot = java_lang_reflect_Method::slot(reflected);
460 }
461 Klass* k = java_lang_Class::as_Klass(mirror);
462
463 KlassHandle k1(THREAD, k);
464 // Make sure class is initialized before handing id's out to methods
465 k1()->initialize(CHECK_NULL);
466 Method* m = InstanceKlass::cast(k1())->method_with_idnum(slot);
467 ret = m==NULL? NULL : m->jmethod_id(); // return NULL if reflected method deleted
468 return ret;
469 JNI_END
470
471 DT_RETURN_MARK_DECL(FromReflectedField, jfieldID
472 , HOTSPOT_JNI_FROMREFLECTEDFIELD_RETURN((uintptr_t)_ret_ref));
473
474 JNI_ENTRY(jfieldID, jni_FromReflectedField(JNIEnv *env, jobject field))
475 JNIWrapper("FromReflectedField");
476
477 HOTSPOT_JNI_FROMREFLECTEDFIELD_ENTRY(env, field);
478
479 jfieldID ret = NULL;
480 DT_RETURN_MARK(FromReflectedField, jfieldID, (const jfieldID&)ret);
481
482 // field is a handle to a java.lang.reflect.Field object
483 oop reflected = JNIHandles::resolve_non_null(field);
484 oop mirror = java_lang_reflect_Field::clazz(reflected);
485 Klass* k = java_lang_Class::as_Klass(mirror);
486 int slot = java_lang_reflect_Field::slot(reflected);
487 int modifiers = java_lang_reflect_Field::modifiers(reflected);
488
489 KlassHandle k1(THREAD, k);
490 // Make sure class is initialized before handing id's out to fields
491 k1()->initialize(CHECK_NULL);
492
493 // First check if this is a static field
494 if (modifiers & JVM_ACC_STATIC) {
495 intptr_t offset = InstanceKlass::cast(k1())->field_offset( slot );
496 JNIid* id = InstanceKlass::cast(k1())->jni_id_for(offset);
497 assert(id != NULL, "corrupt Field object");
498 debug_only(id->set_is_static_field_id();)
499 // A jfieldID for a static field is a JNIid specifying the field holder and the offset within the Klass*
500 ret = jfieldIDWorkaround::to_static_jfieldID(id);
501 return ret;
502 }
503
504 // The slot is the index of the field description in the field-array
505 // The jfieldID is the offset of the field within the object
506 // It may also have hash bits for k, if VerifyJNIFields is turned on.
507 intptr_t offset = InstanceKlass::cast(k1())->field_offset( slot );
508 assert(InstanceKlass::cast(k1())->contains_field_offset(offset), "stay within object");
509 ret = jfieldIDWorkaround::to_instance_jfieldID(k1(), offset);
510 return ret;
511 JNI_END
512
513
514 DT_RETURN_MARK_DECL(ToReflectedMethod, jobject
515 , HOTSPOT_JNI_TOREFLECTEDMETHOD_RETURN(_ret_ref));
516
517 JNI_ENTRY(jobject, jni_ToReflectedMethod(JNIEnv *env, jclass cls, jmethodID method_id, jboolean isStatic))
518 JNIWrapper("ToReflectedMethod");
519
520 HOTSPOT_JNI_TOREFLECTEDMETHOD_ENTRY(env, cls, (uintptr_t) method_id, isStatic);
521
522 jobject ret = NULL;
523 DT_RETURN_MARK(ToReflectedMethod, jobject, (const jobject&)ret);
524
525 methodHandle m (THREAD, Method::resolve_jmethod_id(method_id));
526 assert(m->is_static() == (isStatic != 0), "jni_ToReflectedMethod access flags doesn't match");
527 oop reflection_method;
528 if (m->is_initializer()) {
529 reflection_method = Reflection::new_constructor(m, CHECK_NULL);
530 } else {
531 reflection_method = Reflection::new_method(m, false, CHECK_NULL);
532 }
533 ret = JNIHandles::make_local(env, reflection_method);
534 return ret;
535 JNI_END
536
537 DT_RETURN_MARK_DECL(GetSuperclass, jclass
538 , HOTSPOT_JNI_GETSUPERCLASS_RETURN(_ret_ref));
539
540 JNI_ENTRY(jclass, jni_GetSuperclass(JNIEnv *env, jclass sub))
541 JNIWrapper("GetSuperclass");
542
543 HOTSPOT_JNI_GETSUPERCLASS_ENTRY(env, sub);
544
545 jclass obj = NULL;
546 DT_RETURN_MARK(GetSuperclass, jclass, (const jclass&)obj);
547
548 oop mirror = JNIHandles::resolve_non_null(sub);
549 // primitive classes return NULL
550 if (java_lang_Class::is_primitive(mirror)) return NULL;
551
552 // Rules of Class.getSuperClass as implemented by KLass::java_super:
553 // arrays return Object
554 // interfaces return NULL
555 // proper classes return Klass::super()
556 Klass* k = java_lang_Class::as_Klass(mirror);
557 if (k->is_interface()) return NULL;
558
559 // return mirror for superclass
560 Klass* super = k->java_super();
561 // super2 is the value computed by the compiler's getSuperClass intrinsic:
562 debug_only(Klass* super2 = ( k->oop_is_array()
563 ? SystemDictionary::Object_klass()
564 : k->super() ) );
565 assert(super == super2,
566 "java_super computation depends on interface, array, other super");
567 obj = (super == NULL) ? NULL : (jclass) JNIHandles::make_local(super->java_mirror());
568 return obj;
569 JNI_END
570
571 JNI_QUICK_ENTRY(jboolean, jni_IsAssignableFrom(JNIEnv *env, jclass sub, jclass super))
572 JNIWrapper("IsSubclassOf");
573
574 HOTSPOT_JNI_ISASSIGNABLEFROM_ENTRY(env, sub, super);
575
576 oop sub_mirror = JNIHandles::resolve_non_null(sub);
577 oop super_mirror = JNIHandles::resolve_non_null(super);
578 if (java_lang_Class::is_primitive(sub_mirror) ||
579 java_lang_Class::is_primitive(super_mirror)) {
580 jboolean ret = (sub_mirror == super_mirror);
581
582 HOTSPOT_JNI_ISASSIGNABLEFROM_RETURN(ret);
583 return ret;
584 }
585 Klass* sub_klass = java_lang_Class::as_Klass(sub_mirror);
586 Klass* super_klass = java_lang_Class::as_Klass(super_mirror);
587 assert(sub_klass != NULL && super_klass != NULL, "invalid arguments to jni_IsAssignableFrom");
588 jboolean ret = sub_klass->is_subtype_of(super_klass) ?
589 JNI_TRUE : JNI_FALSE;
590
591 HOTSPOT_JNI_ISASSIGNABLEFROM_RETURN(ret);
592 return ret;
593 JNI_END
594
595
596 DT_RETURN_MARK_DECL(Throw, jint
597 , HOTSPOT_JNI_THROW_RETURN(_ret_ref));
598
599 JNI_ENTRY(jint, jni_Throw(JNIEnv *env, jthrowable obj))
600 JNIWrapper("Throw");
601
602 HOTSPOT_JNI_THROW_ENTRY(env, obj);
603
604 jint ret = JNI_OK;
605 DT_RETURN_MARK(Throw, jint, (const jint&)ret);
606
607 THROW_OOP_(JNIHandles::resolve(obj), JNI_OK);
608 ShouldNotReachHere();
609 return 0; // Mute compiler.
610 JNI_END
611
612
613 DT_RETURN_MARK_DECL(ThrowNew, jint
614 , HOTSPOT_JNI_THROWNEW_RETURN(_ret_ref));
615
616 JNI_ENTRY(jint, jni_ThrowNew(JNIEnv *env, jclass clazz, const char *message))
617 JNIWrapper("ThrowNew");
618
619 HOTSPOT_JNI_THROWNEW_ENTRY(env, clazz, (char *) message);
620
621 jint ret = JNI_OK;
622 DT_RETURN_MARK(ThrowNew, jint, (const jint&)ret);
623
624 InstanceKlass* k = InstanceKlass::cast(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz)));
625 Symbol* name = k->name();
626 Handle class_loader (THREAD, k->class_loader());
627 Handle protection_domain (THREAD, k->protection_domain());
628 THROW_MSG_LOADER_(name, (char *)message, class_loader, protection_domain, JNI_OK);
629 ShouldNotReachHere();
630 return 0; // Mute compiler.
631 JNI_END
632
633
634 // JNI functions only transform a pending async exception to a synchronous
635 // exception in ExceptionOccurred and ExceptionCheck calls, since
636 // delivering an async exception in other places won't change the native
637 // code's control flow and would be harmful when native code further calls
638 // JNI functions with a pending exception. Async exception is also checked
639 // during the call, so ExceptionOccurred/ExceptionCheck won't return
640 // false but deliver the async exception at the very end during
641 // state transition.
642
643 static void jni_check_async_exceptions(JavaThread *thread) {
644 assert(thread == Thread::current(), "must be itself");
645 thread->check_and_handle_async_exceptions();
646 }
647
648 JNI_ENTRY_NO_PRESERVE(jthrowable, jni_ExceptionOccurred(JNIEnv *env))
649 JNIWrapper("ExceptionOccurred");
650
651 HOTSPOT_JNI_EXCEPTIONOCCURRED_ENTRY(env);
652
653 jni_check_async_exceptions(thread);
654 oop exception = thread->pending_exception();
655 jthrowable ret = (jthrowable) JNIHandles::make_local(env, exception);
656
657 HOTSPOT_JNI_EXCEPTIONOCCURRED_RETURN(ret);
658 return ret;
659 JNI_END
660
661
662 JNI_ENTRY_NO_PRESERVE(void, jni_ExceptionDescribe(JNIEnv *env))
663 JNIWrapper("ExceptionDescribe");
664
665 HOTSPOT_JNI_EXCEPTIONDESCRIBE_ENTRY(env);
666
667 if (thread->has_pending_exception()) {
668 Handle ex(thread, thread->pending_exception());
669 thread->clear_pending_exception();
670 if (ex->is_a(SystemDictionary::ThreadDeath_klass())) {
671 // Don't print anything if we are being killed.
672 } else {
673 jio_fprintf(defaultStream::error_stream(), "Exception ");
674 if (thread != NULL && thread->threadObj() != NULL) {
675 ResourceMark rm(THREAD);
676 jio_fprintf(defaultStream::error_stream(),
677 "in thread \"%s\" ", thread->get_thread_name());
678 }
679 if (ex->is_a(SystemDictionary::Throwable_klass())) {
680 JavaValue result(T_VOID);
681 JavaCalls::call_virtual(&result,
682 ex,
683 KlassHandle(THREAD,
684 SystemDictionary::Throwable_klass()),
685 vmSymbols::printStackTrace_name(),
686 vmSymbols::void_method_signature(),
687 THREAD);
688 // If an exception is thrown in the call it gets thrown away. Not much
689 // we can do with it. The native code that calls this, does not check
690 // for the exception - hence, it might still be in the thread when DestroyVM gets
691 // called, potentially causing a few asserts to trigger - since no pending exception
692 // is expected.
693 CLEAR_PENDING_EXCEPTION;
694 } else {
695 ResourceMark rm(THREAD);
696 jio_fprintf(defaultStream::error_stream(),
697 ". Uncaught exception of type %s.",
698 ex->klass()->external_name());
699 }
700 }
701 }
702
703 HOTSPOT_JNI_EXCEPTIONDESCRIBE_RETURN();
704 JNI_END
705
706
707 JNI_QUICK_ENTRY(void, jni_ExceptionClear(JNIEnv *env))
708 JNIWrapper("ExceptionClear");
709
710 HOTSPOT_JNI_EXCEPTIONCLEAR_ENTRY(env);
711
712 // The jni code might be using this API to clear java thrown exception.
713 // So just mark jvmti thread exception state as exception caught.
714 JvmtiThreadState *state = JavaThread::current()->jvmti_thread_state();
715 if (state != NULL && state->is_exception_detected()) {
716 state->set_exception_caught();
717 }
718 thread->clear_pending_exception();
719
720 HOTSPOT_JNI_EXCEPTIONCLEAR_RETURN();
721 JNI_END
722
723
724 JNI_ENTRY(void, jni_FatalError(JNIEnv *env, const char *msg))
725 JNIWrapper("FatalError");
726
727 HOTSPOT_JNI_FATALERROR_ENTRY(env, (char *) msg);
728
729 tty->print_cr("FATAL ERROR in native method: %s", msg);
730 thread->print_stack();
731 os::abort(); // Dump core and abort
732 JNI_END
733
734
735 JNI_ENTRY(jint, jni_PushLocalFrame(JNIEnv *env, jint capacity))
736 JNIWrapper("PushLocalFrame");
737
738 HOTSPOT_JNI_PUSHLOCALFRAME_ENTRY(env, capacity);
739
740 //%note jni_11
741 if (capacity < 0 ||
742 ((MaxJNILocalCapacity > 0) && (capacity > MaxJNILocalCapacity))) {
743 HOTSPOT_JNI_PUSHLOCALFRAME_RETURN((uint32_t)JNI_ERR);
744 return JNI_ERR;
745 }
746 JNIHandleBlock* old_handles = thread->active_handles();
747 JNIHandleBlock* new_handles = JNIHandleBlock::allocate_block(thread);
748 assert(new_handles != NULL, "should not be NULL");
749 new_handles->set_pop_frame_link(old_handles);
750 thread->set_active_handles(new_handles);
751 jint ret = JNI_OK;
752 HOTSPOT_JNI_PUSHLOCALFRAME_RETURN(ret);
753 return ret;
754 JNI_END
755
756
757 JNI_ENTRY(jobject, jni_PopLocalFrame(JNIEnv *env, jobject result))
758 JNIWrapper("PopLocalFrame");
759
760 HOTSPOT_JNI_POPLOCALFRAME_ENTRY(env, result);
761
762 //%note jni_11
763 Handle result_handle(thread, JNIHandles::resolve(result));
764 JNIHandleBlock* old_handles = thread->active_handles();
765 JNIHandleBlock* new_handles = old_handles->pop_frame_link();
766 if (new_handles != NULL) {
767 // As a sanity check we only release the handle blocks if the pop_frame_link is not NULL.
768 // This way code will still work if PopLocalFrame is called without a corresponding
769 // PushLocalFrame call. Note that we set the pop_frame_link to NULL explicitly, otherwise
770 // the release_block call will release the blocks.
771 thread->set_active_handles(new_handles);
772 old_handles->set_pop_frame_link(NULL); // clear link we won't release new_handles below
773 JNIHandleBlock::release_block(old_handles, thread); // may block
774 result = JNIHandles::make_local(thread, result_handle());
775 }
776 HOTSPOT_JNI_POPLOCALFRAME_RETURN(result);
777 return result;
778 JNI_END
779
780
781 JNI_ENTRY(jobject, jni_NewGlobalRef(JNIEnv *env, jobject ref))
782 JNIWrapper("NewGlobalRef");
783
784 HOTSPOT_JNI_NEWGLOBALREF_ENTRY(env, ref);
785
786 Handle ref_handle(thread, JNIHandles::resolve(ref));
787 jobject ret = JNIHandles::make_global(ref_handle);
788
789 HOTSPOT_JNI_NEWGLOBALREF_RETURN(ret);
790 return ret;
791 JNI_END
792
793 // Must be JNI_ENTRY (with HandleMark)
794 JNI_ENTRY_NO_PRESERVE(void, jni_DeleteGlobalRef(JNIEnv *env, jobject ref))
795 JNIWrapper("DeleteGlobalRef");
796
797 HOTSPOT_JNI_DELETEGLOBALREF_ENTRY(env, ref);
798
799 JNIHandles::destroy_global(ref);
800
801 HOTSPOT_JNI_DELETEGLOBALREF_RETURN();
802 JNI_END
803
804 JNI_QUICK_ENTRY(void, jni_DeleteLocalRef(JNIEnv *env, jobject obj))
805 JNIWrapper("DeleteLocalRef");
806
807 HOTSPOT_JNI_DELETELOCALREF_ENTRY(env, obj);
808
809 JNIHandles::destroy_local(obj);
810
811 HOTSPOT_JNI_DELETELOCALREF_RETURN();
812 JNI_END
813
814 JNI_QUICK_ENTRY(jboolean, jni_IsSameObject(JNIEnv *env, jobject r1, jobject r2))
815 JNIWrapper("IsSameObject");
816
817 HOTSPOT_JNI_ISSAMEOBJECT_ENTRY(env, r1, r2);
818
819 oop a = JNIHandles::resolve(r1);
820 oop b = JNIHandles::resolve(r2);
821 jboolean ret = (a == b) ? JNI_TRUE : JNI_FALSE;
822
823 HOTSPOT_JNI_ISSAMEOBJECT_RETURN(ret);
824 return ret;
825 JNI_END
826
827
828 JNI_ENTRY(jobject, jni_NewLocalRef(JNIEnv *env, jobject ref))
829 JNIWrapper("NewLocalRef");
830
831 HOTSPOT_JNI_NEWLOCALREF_ENTRY(env, ref);
832
833 jobject ret = JNIHandles::make_local(env, JNIHandles::resolve(ref));
834
835 HOTSPOT_JNI_NEWLOCALREF_RETURN(ret);
836 return ret;
837 JNI_END
838
839 JNI_LEAF(jint, jni_EnsureLocalCapacity(JNIEnv *env, jint capacity))
840 JNIWrapper("EnsureLocalCapacity");
841
842 HOTSPOT_JNI_ENSURELOCALCAPACITY_ENTRY(env, capacity);
843
844 jint ret;
845 if (capacity >= 0 &&
846 ((MaxJNILocalCapacity <= 0) || (capacity <= MaxJNILocalCapacity))) {
847 ret = JNI_OK;
848 } else {
849 ret = JNI_ERR;
850 }
851
852 HOTSPOT_JNI_ENSURELOCALCAPACITY_RETURN(ret);
853 return ret;
854 JNI_END
855
856 // Return the Handle Type
857 JNI_LEAF(jobjectRefType, jni_GetObjectRefType(JNIEnv *env, jobject obj))
858 JNIWrapper("GetObjectRefType");
859
860 HOTSPOT_JNI_GETOBJECTREFTYPE_ENTRY(env, obj);
861
862 jobjectRefType ret;
863 if (JNIHandles::is_local_handle(thread, obj) ||
864 JNIHandles::is_frame_handle(thread, obj))
865 ret = JNILocalRefType;
866 else if (JNIHandles::is_global_handle(obj))
867 ret = JNIGlobalRefType;
868 else if (JNIHandles::is_weak_global_handle(obj))
869 ret = JNIWeakGlobalRefType;
870 else
871 ret = JNIInvalidRefType;
872
873 HOTSPOT_JNI_GETOBJECTREFTYPE_RETURN((void *) ret);
874 return ret;
875 JNI_END
876
877
878 class JNI_ArgumentPusher : public SignatureIterator {
879 protected:
880 JavaCallArguments* _arguments;
881
882 virtual void get_bool () = 0;
883 virtual void get_char () = 0;
884 virtual void get_short () = 0;
885 virtual void get_byte () = 0;
886 virtual void get_int () = 0;
887 virtual void get_long () = 0;
888 virtual void get_float () = 0;
889 virtual void get_double () = 0;
890 virtual void get_object () = 0;
891
892 JNI_ArgumentPusher(Symbol* signature) : SignatureIterator(signature) {
893 this->_return_type = T_ILLEGAL;
894 _arguments = NULL;
895 }
896
897 public:
898 virtual void iterate( uint64_t fingerprint ) = 0;
899
900 void set_java_argument_object(JavaCallArguments *arguments) { _arguments = arguments; }
901
902 inline void do_bool() { if (!is_return_type()) get_bool(); }
903 inline void do_char() { if (!is_return_type()) get_char(); }
904 inline void do_short() { if (!is_return_type()) get_short(); }
905 inline void do_byte() { if (!is_return_type()) get_byte(); }
906 inline void do_int() { if (!is_return_type()) get_int(); }
907 inline void do_long() { if (!is_return_type()) get_long(); }
908 inline void do_float() { if (!is_return_type()) get_float(); }
909 inline void do_double() { if (!is_return_type()) get_double(); }
910 inline void do_object(int begin, int end) { if (!is_return_type()) get_object(); }
911 inline void do_array(int begin, int end) { if (!is_return_type()) get_object(); } // do_array uses get_object -- there is no get_array
912 inline void do_void() { }
913
914 JavaCallArguments* arguments() { return _arguments; }
915 void push_receiver(Handle h) { _arguments->push_oop(h); }
916 };
917
918
919 class JNI_ArgumentPusherVaArg : public JNI_ArgumentPusher {
920 protected:
921 va_list _ap;
922
923 inline void get_bool() { _arguments->push_int(va_arg(_ap, jint)); } // bool is coerced to int when using va_arg
924 inline void get_char() { _arguments->push_int(va_arg(_ap, jint)); } // char is coerced to int when using va_arg
925 inline void get_short() { _arguments->push_int(va_arg(_ap, jint)); } // short is coerced to int when using va_arg
926 inline void get_byte() { _arguments->push_int(va_arg(_ap, jint)); } // byte is coerced to int when using va_arg
927 inline void get_int() { _arguments->push_int(va_arg(_ap, jint)); }
928
929 // each of these paths is exercized by the various jck Call[Static,Nonvirtual,][Void,Int,..]Method[A,V,] tests
930
931 inline void get_long() { _arguments->push_long(va_arg(_ap, jlong)); }
932 inline void get_float() { _arguments->push_float((jfloat)va_arg(_ap, jdouble)); } // float is coerced to double w/ va_arg
933 inline void get_double() { _arguments->push_double(va_arg(_ap, jdouble)); }
934 inline void get_object() { jobject l = va_arg(_ap, jobject);
935 _arguments->push_oop(Handle((oop *)l, false)); }
936
937 inline void set_ap(va_list rap) {
938 #ifdef va_copy
939 va_copy(_ap, rap);
940 #elif defined (__va_copy)
941 __va_copy(_ap, rap);
942 #else
943 _ap = rap;
944 #endif
945 }
946
947 public:
948 JNI_ArgumentPusherVaArg(Symbol* signature, va_list rap)
949 : JNI_ArgumentPusher(signature) {
950 set_ap(rap);
951 }
952 JNI_ArgumentPusherVaArg(jmethodID method_id, va_list rap)
953 : JNI_ArgumentPusher(Method::resolve_jmethod_id(method_id)->signature()) {
954 set_ap(rap);
955 }
956
957 // Optimized path if we have the bitvector form of signature
958 void iterate( uint64_t fingerprint ) {
959 if (fingerprint == (uint64_t)CONST64(-1)) {
960 SignatureIterator::iterate(); // Must be too many arguments
961 } else {
962 _return_type = (BasicType)((fingerprint >> static_feature_size) &
963 result_feature_mask);
964
965 assert(fingerprint, "Fingerprint should not be 0");
966 fingerprint = fingerprint >> (static_feature_size + result_feature_size);
967 while ( 1 ) {
968 switch ( fingerprint & parameter_feature_mask ) {
969 case bool_parm:
970 case char_parm:
971 case short_parm:
972 case byte_parm:
973 case int_parm:
974 get_int();
975 break;
976 case obj_parm:
977 get_object();
978 break;
979 case long_parm:
980 get_long();
981 break;
982 case float_parm:
983 get_float();
984 break;
985 case double_parm:
986 get_double();
987 break;
988 case done_parm:
989 return;
990 break;
991 default:
992 ShouldNotReachHere();
993 break;
994 }
995 fingerprint >>= parameter_feature_size;
996 }
997 }
998 }
999 };
1000
1001
1002 class JNI_ArgumentPusherArray : public JNI_ArgumentPusher {
1003 protected:
1004 const jvalue *_ap;
1005
1006 inline void get_bool() { _arguments->push_int((jint)(_ap++)->z); }
1007 inline void get_char() { _arguments->push_int((jint)(_ap++)->c); }
1008 inline void get_short() { _arguments->push_int((jint)(_ap++)->s); }
1009 inline void get_byte() { _arguments->push_int((jint)(_ap++)->b); }
1010 inline void get_int() { _arguments->push_int((jint)(_ap++)->i); }
1011
1012 inline void get_long() { _arguments->push_long((_ap++)->j); }
1013 inline void get_float() { _arguments->push_float((_ap++)->f); }
1014 inline void get_double() { _arguments->push_double((_ap++)->d);}
1015 inline void get_object() { _arguments->push_oop(Handle((oop *)(_ap++)->l, false)); }
1016
1017 inline void set_ap(const jvalue *rap) { _ap = rap; }
1018
1019 public:
1020 JNI_ArgumentPusherArray(Symbol* signature, const jvalue *rap)
1021 : JNI_ArgumentPusher(signature) {
1022 set_ap(rap);
1023 }
1024 JNI_ArgumentPusherArray(jmethodID method_id, const jvalue *rap)
1025 : JNI_ArgumentPusher(Method::resolve_jmethod_id(method_id)->signature()) {
1026 set_ap(rap);
1027 }
1028
1029 // Optimized path if we have the bitvector form of signature
1030 void iterate( uint64_t fingerprint ) {
1031 if (fingerprint == (uint64_t)CONST64(-1)) {
1032 SignatureIterator::iterate(); // Must be too many arguments
1033 } else {
1034 _return_type = (BasicType)((fingerprint >> static_feature_size) &
1035 result_feature_mask);
1036 assert(fingerprint, "Fingerprint should not be 0");
1037 fingerprint = fingerprint >> (static_feature_size + result_feature_size);
1038 while ( 1 ) {
1039 switch ( fingerprint & parameter_feature_mask ) {
1040 case bool_parm:
1041 get_bool();
1042 break;
1043 case char_parm:
1044 get_char();
1045 break;
1046 case short_parm:
1047 get_short();
1048 break;
1049 case byte_parm:
1050 get_byte();
1051 break;
1052 case int_parm:
1053 get_int();
1054 break;
1055 case obj_parm:
1056 get_object();
1057 break;
1058 case long_parm:
1059 get_long();
1060 break;
1061 case float_parm:
1062 get_float();
1063 break;
1064 case double_parm:
1065 get_double();
1066 break;
1067 case done_parm:
1068 return;
1069 break;
1070 default:
1071 ShouldNotReachHere();
1072 break;
1073 }
1074 fingerprint >>= parameter_feature_size;
1075 }
1076 }
1077 }
1078 };
1079
1080
1081 enum JNICallType {
1082 JNI_STATIC,
1083 JNI_VIRTUAL,
1084 JNI_NONVIRTUAL
1085 };
1086
1087
1088
1089 static void jni_invoke_static(JNIEnv *env, JavaValue* result, jobject receiver, JNICallType call_type, jmethodID method_id, JNI_ArgumentPusher *args, TRAPS) {
1090 methodHandle method(THREAD, Method::resolve_jmethod_id(method_id));
1091
1092 // Create object to hold arguments for the JavaCall, and associate it with
1093 // the jni parser
1094 ResourceMark rm(THREAD);
1095 int number_of_parameters = method->size_of_parameters();
1096 JavaCallArguments java_args(number_of_parameters);
1097 args->set_java_argument_object(&java_args);
1098
1099 assert(method->is_static(), "method should be static");
1100
1101 // Fill out JavaCallArguments object
1102 args->iterate( Fingerprinter(method).fingerprint() );
1103 // Initialize result type
1104 result->set_type(args->get_ret_type());
1105
1106 // Invoke the method. Result is returned as oop.
1107 JavaCalls::call(result, method, &java_args, CHECK);
1108
1109 // Convert result
1110 if (result->get_type() == T_OBJECT || result->get_type() == T_ARRAY) {
1111 result->set_jobject(JNIHandles::make_local(env, (oop) result->get_jobject()));
1112 }
1113 }
1114
1115
1116 static void jni_invoke_nonstatic(JNIEnv *env, JavaValue* result, jobject receiver, JNICallType call_type, jmethodID method_id, JNI_ArgumentPusher *args, TRAPS) {
1117 oop recv = JNIHandles::resolve(receiver);
1118 if (recv == NULL) {
1119 THROW(vmSymbols::java_lang_NullPointerException());
1120 }
1121 Handle h_recv(THREAD, recv);
1122
1123 int number_of_parameters;
1124 Method* selected_method;
1125 {
1126 Method* m = Method::resolve_jmethod_id(method_id);
1127 number_of_parameters = m->size_of_parameters();
1128 Klass* holder = m->method_holder();
1129 if (!(holder)->is_interface()) {
1130 // non-interface call -- for that little speed boost, don't handlize
1131 debug_only(No_Safepoint_Verifier nosafepoint;)
1132 if (call_type == JNI_VIRTUAL) {
1133 // jni_GetMethodID makes sure class is linked and initialized
1134 // so m should have a valid vtable index.
1135 assert(!m->has_itable_index(), "");
1136 int vtbl_index = m->vtable_index();
1137 if (vtbl_index != Method::nonvirtual_vtable_index) {
1138 Klass* k = h_recv->klass();
1139 // k might be an arrayKlassOop but all vtables start at
1140 // the same place. The cast is to avoid virtual call and assertion.
1141 InstanceKlass *ik = (InstanceKlass*)k;
1142 selected_method = ik->method_at_vtable(vtbl_index);
1143 } else {
1144 // final method
1145 selected_method = m;
1146 }
1147 } else {
1148 // JNI_NONVIRTUAL call
1149 selected_method = m;
1150 }
1151 } else {
1152 // interface call
1153 KlassHandle h_holder(THREAD, holder);
1154
1155 if (call_type == JNI_VIRTUAL) {
1156 int itbl_index = m->itable_index();
1157 Klass* k = h_recv->klass();
1158 selected_method = InstanceKlass::cast(k)->method_at_itable(h_holder(), itbl_index, CHECK);
1159 } else {
1160 selected_method = m;
1161 }
1162 }
1163 }
1164
1165 methodHandle method(THREAD, selected_method);
1166
1167 // Create object to hold arguments for the JavaCall, and associate it with
1168 // the jni parser
1169 ResourceMark rm(THREAD);
1170 JavaCallArguments java_args(number_of_parameters);
1171 args->set_java_argument_object(&java_args);
1172
1173 // handle arguments
1174 assert(!method->is_static(), "method should not be static");
1175 args->push_receiver(h_recv); // Push jobject handle
1176
1177 // Fill out JavaCallArguments object
1178 args->iterate( Fingerprinter(method).fingerprint() );
1179 // Initialize result type
1180 result->set_type(args->get_ret_type());
1181
1182 // Invoke the method. Result is returned as oop.
1183 JavaCalls::call(result, method, &java_args, CHECK);
1184
1185 // Convert result
1186 if (result->get_type() == T_OBJECT || result->get_type() == T_ARRAY) {
1187 result->set_jobject(JNIHandles::make_local(env, (oop) result->get_jobject()));
1188 }
1189 }
1190
1191
1192 static instanceOop alloc_object(jclass clazz, TRAPS) {
1193 KlassHandle k(THREAD, java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz)));
1194 if (k == NULL) {
1195 ResourceMark rm(THREAD);
1196 THROW_(vmSymbols::java_lang_InstantiationException(), NULL);
1197 }
1198 k()->check_valid_for_instantiation(false, CHECK_NULL);
1199 InstanceKlass::cast(k())->initialize(CHECK_NULL);
1200 instanceOop ih = InstanceKlass::cast(k())->allocate_instance(THREAD);
1201 return ih;
1202 }
1203
1204 DT_RETURN_MARK_DECL(AllocObject, jobject
1205 , HOTSPOT_JNI_ALLOCOBJECT_RETURN(_ret_ref));
1206
1207 JNI_ENTRY(jobject, jni_AllocObject(JNIEnv *env, jclass clazz))
1208 JNIWrapper("AllocObject");
1209
1210 HOTSPOT_JNI_ALLOCOBJECT_ENTRY(env, clazz);
1211
1212 jobject ret = NULL;
1213 DT_RETURN_MARK(AllocObject, jobject, (const jobject&)ret);
1214
1215 instanceOop i = alloc_object(clazz, CHECK_NULL);
1216 ret = JNIHandles::make_local(env, i);
1217 return ret;
1218 JNI_END
1219
1220 DT_RETURN_MARK_DECL(NewObjectA, jobject
1221 , HOTSPOT_JNI_NEWOBJECTA_RETURN(_ret_ref));
1222
1223 JNI_ENTRY(jobject, jni_NewObjectA(JNIEnv *env, jclass clazz, jmethodID methodID, const jvalue *args))
1224 JNIWrapper("NewObjectA");
1225
1226 HOTSPOT_JNI_NEWOBJECTA_ENTRY(env, clazz, (uintptr_t) methodID);
1227
1228 jobject obj = NULL;
1229 DT_RETURN_MARK(NewObjectA, jobject, (const jobject)obj);
1230
1231 instanceOop i = alloc_object(clazz, CHECK_NULL);
1232 obj = JNIHandles::make_local(env, i);
1233 JavaValue jvalue(T_VOID);
1234 JNI_ArgumentPusherArray ap(methodID, args);
1235 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_NULL);
1236 return obj;
1237 JNI_END
1238
1239
1240 DT_RETURN_MARK_DECL(NewObjectV, jobject
1241 , HOTSPOT_JNI_NEWOBJECTV_RETURN(_ret_ref));
1242
1243 JNI_ENTRY(jobject, jni_NewObjectV(JNIEnv *env, jclass clazz, jmethodID methodID, va_list args))
1244 JNIWrapper("NewObjectV");
1245
1246 HOTSPOT_JNI_NEWOBJECTV_ENTRY(env, clazz, (uintptr_t) methodID);
1247
1248 jobject obj = NULL;
1249 DT_RETURN_MARK(NewObjectV, jobject, (const jobject&)obj);
1250
1251 instanceOop i = alloc_object(clazz, CHECK_NULL);
1252 obj = JNIHandles::make_local(env, i);
1253 JavaValue jvalue(T_VOID);
1254 JNI_ArgumentPusherVaArg ap(methodID, args);
1255 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_NULL);
1256 return obj;
1257 JNI_END
1258
1259
1260 DT_RETURN_MARK_DECL(NewObject, jobject
1261 , HOTSPOT_JNI_NEWOBJECT_RETURN(_ret_ref));
1262
1263 JNI_ENTRY(jobject, jni_NewObject(JNIEnv *env, jclass clazz, jmethodID methodID, ...))
1264 JNIWrapper("NewObject");
1265
1266 HOTSPOT_JNI_NEWOBJECT_ENTRY(env, clazz, (uintptr_t) methodID);
1267
1268 jobject obj = NULL;
1269 DT_RETURN_MARK(NewObject, jobject, (const jobject&)obj);
1270
1271 instanceOop i = alloc_object(clazz, CHECK_NULL);
1272 obj = JNIHandles::make_local(env, i);
1273 va_list args;
1274 va_start(args, methodID);
1275 JavaValue jvalue(T_VOID);
1276 JNI_ArgumentPusherVaArg ap(methodID, args);
1277 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_NULL);
1278 va_end(args);
1279 return obj;
1280 JNI_END
1281
1282
1283 JNI_ENTRY(jclass, jni_GetObjectClass(JNIEnv *env, jobject obj))
1284 JNIWrapper("GetObjectClass");
1285
1286 HOTSPOT_JNI_GETOBJECTCLASS_ENTRY(env, obj);
1287
1288 Klass* k = JNIHandles::resolve_non_null(obj)->klass();
1289 jclass ret =
1290 (jclass) JNIHandles::make_local(env, k->java_mirror());
1291
1292 HOTSPOT_JNI_GETOBJECTCLASS_RETURN(ret);
1293 return ret;
1294 JNI_END
1295
1296 JNI_QUICK_ENTRY(jboolean, jni_IsInstanceOf(JNIEnv *env, jobject obj, jclass clazz))
1297 JNIWrapper("IsInstanceOf");
1298
1299 HOTSPOT_JNI_ISINSTANCEOF_ENTRY(env, obj, clazz);
1300
1301 jboolean ret = JNI_TRUE;
1302 if (obj != NULL) {
1303 ret = JNI_FALSE;
1304 Klass* k = java_lang_Class::as_Klass(
1305 JNIHandles::resolve_non_null(clazz));
1306 if (k != NULL) {
1307 ret = JNIHandles::resolve_non_null(obj)->is_a(k) ? JNI_TRUE : JNI_FALSE;
1308 }
1309 }
1310
1311 HOTSPOT_JNI_ISINSTANCEOF_RETURN(ret);
1312 return ret;
1313 JNI_END
1314
1315
1316 static jmethodID get_method_id(JNIEnv *env, jclass clazz, const char *name_str,
1317 const char *sig, bool is_static, TRAPS) {
1318 // %%%% This code should probably just call into a method in the LinkResolver
1319 //
1320 // The class should have been loaded (we have an instance of the class
1321 // passed in) so the method and signature should already be in the symbol
1322 // table. If they're not there, the method doesn't exist.
1323 const char *name_to_probe = (name_str == NULL)
1324 ? vmSymbols::object_initializer_name()->as_C_string()
1325 : name_str;
1326 TempNewSymbol name = SymbolTable::probe(name_to_probe, (int)strlen(name_to_probe));
1327 TempNewSymbol signature = SymbolTable::probe(sig, (int)strlen(sig));
1328
1329 if (name == NULL || signature == NULL) {
1330 THROW_MSG_0(vmSymbols::java_lang_NoSuchMethodError(), name_str);
1331 }
1332
1333 // Throw a NoSuchMethodError exception if we have an instance of a
1334 // primitive java.lang.Class
1335 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(clazz))) {
1336 THROW_MSG_0(vmSymbols::java_lang_NoSuchMethodError(), name_str);
1337 }
1338
1339 KlassHandle klass(THREAD,
1340 java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz)));
1341
1342 // Make sure class is linked and initialized before handing id's out to
1343 // Method*s.
1344 klass()->initialize(CHECK_NULL);
1345
1346 Method* m;
1347 if (name == vmSymbols::object_initializer_name() ||
1348 name == vmSymbols::class_initializer_name()) {
1349 // Never search superclasses for constructors
1350 if (klass->oop_is_instance()) {
1351 m = InstanceKlass::cast(klass())->find_method(name, signature);
1352 } else {
1353 m = NULL;
1354 }
1355 } else {
1356 m = klass->lookup_method(name, signature);
1357 if (m == NULL && klass->oop_is_instance()) {
1358 m = InstanceKlass::cast(klass())->lookup_method_in_ordered_interfaces(name, signature);
1359 }
1360 }
1361 if (m == NULL || (m->is_static() != is_static)) {
1362 THROW_MSG_0(vmSymbols::java_lang_NoSuchMethodError(), name_str);
1363 }
1364 return m->jmethod_id();
1365 }
1366
1367
1368 JNI_ENTRY(jmethodID, jni_GetMethodID(JNIEnv *env, jclass clazz,
1369 const char *name, const char *sig))
1370 JNIWrapper("GetMethodID");
1371 HOTSPOT_JNI_GETMETHODID_ENTRY(env, clazz, (char *) name, (char *) sig);
1372 jmethodID ret = get_method_id(env, clazz, name, sig, false, thread);
1373 HOTSPOT_JNI_GETMETHODID_RETURN((uintptr_t) ret);
1374 return ret;
1375 JNI_END
1376
1377
1378 JNI_ENTRY(jmethodID, jni_GetStaticMethodID(JNIEnv *env, jclass clazz,
1379 const char *name, const char *sig))
1380 JNIWrapper("GetStaticMethodID");
1381 HOTSPOT_JNI_GETSTATICMETHODID_ENTRY(env, (char *) clazz, (char *) name, (char *)sig);
1382 jmethodID ret = get_method_id(env, clazz, name, sig, true, thread);
1383 HOTSPOT_JNI_GETSTATICMETHODID_RETURN((uintptr_t) ret);
1384 return ret;
1385 JNI_END
1386
1387
1388
1389 //
1390 // Calling Methods
1391 //
1392
1393
1394 #define DEFINE_CALLMETHOD(ResultType, Result, Tag \
1395 , EntryProbe, ReturnProbe) \
1396 \
1397 DT_RETURN_MARK_DECL_FOR(Result, Call##Result##Method, ResultType \
1398 , ReturnProbe); \
1399 \
1400 JNI_ENTRY(ResultType, \
1401 jni_Call##Result##Method(JNIEnv *env, jobject obj, jmethodID methodID, ...)) \
1402 JNIWrapper("Call" XSTR(Result) "Method"); \
1403 \
1404 EntryProbe; \
1405 ResultType ret = 0;\
1406 DT_RETURN_MARK_FOR(Result, Call##Result##Method, ResultType, \
1407 (const ResultType&)ret);\
1408 \
1409 va_list args; \
1410 va_start(args, methodID); \
1411 JavaValue jvalue(Tag); \
1412 JNI_ArgumentPusherVaArg ap(methodID, args); \
1413 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK_0); \
1414 va_end(args); \
1415 ret = jvalue.get_##ResultType(); \
1416 return ret;\
1417 JNI_END
1418
1419 // the runtime type of subword integral basic types is integer
1420 DEFINE_CALLMETHOD(jboolean, Boolean, T_BOOLEAN
1421 , HOTSPOT_JNI_CALLBOOLEANMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1422 HOTSPOT_JNI_CALLBOOLEANMETHOD_RETURN(_ret_ref))
1423 DEFINE_CALLMETHOD(jbyte, Byte, T_BYTE
1424 , HOTSPOT_JNI_CALLBYTEMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1425 HOTSPOT_JNI_CALLBYTEMETHOD_RETURN(_ret_ref))
1426 DEFINE_CALLMETHOD(jchar, Char, T_CHAR
1427 , HOTSPOT_JNI_CALLCHARMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1428 HOTSPOT_JNI_CALLCHARMETHOD_RETURN(_ret_ref))
1429 DEFINE_CALLMETHOD(jshort, Short, T_SHORT
1430 , HOTSPOT_JNI_CALLSHORTMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1431 HOTSPOT_JNI_CALLSHORTMETHOD_RETURN(_ret_ref))
1432
1433 DEFINE_CALLMETHOD(jobject, Object, T_OBJECT
1434 , HOTSPOT_JNI_CALLOBJECTMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1435 HOTSPOT_JNI_CALLOBJECTMETHOD_RETURN(_ret_ref))
1436 DEFINE_CALLMETHOD(jint, Int, T_INT,
1437 HOTSPOT_JNI_CALLINTMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1438 HOTSPOT_JNI_CALLINTMETHOD_RETURN(_ret_ref))
1439 DEFINE_CALLMETHOD(jlong, Long, T_LONG
1440 , HOTSPOT_JNI_CALLLONGMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1441 HOTSPOT_JNI_CALLLONGMETHOD_RETURN(_ret_ref))
1442 // Float and double probes don't return value because dtrace doesn't currently support it
1443 DEFINE_CALLMETHOD(jfloat, Float, T_FLOAT
1444 , HOTSPOT_JNI_CALLFLOATMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1445 HOTSPOT_JNI_CALLFLOATMETHOD_RETURN())
1446 DEFINE_CALLMETHOD(jdouble, Double, T_DOUBLE
1447 , HOTSPOT_JNI_CALLDOUBLEMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1448 HOTSPOT_JNI_CALLDOUBLEMETHOD_RETURN())
1449
1450 #define DEFINE_CALLMETHODV(ResultType, Result, Tag \
1451 , EntryProbe, ReturnProbe) \
1452 \
1453 DT_RETURN_MARK_DECL_FOR(Result, Call##Result##MethodV, ResultType \
1454 , ReturnProbe); \
1455 \
1456 JNI_ENTRY(ResultType, \
1457 jni_Call##Result##MethodV(JNIEnv *env, jobject obj, jmethodID methodID, va_list args)) \
1458 JNIWrapper("Call" XSTR(Result) "MethodV"); \
1459 \
1460 EntryProbe;\
1461 ResultType ret = 0;\
1462 DT_RETURN_MARK_FOR(Result, Call##Result##MethodV, ResultType, \
1463 (const ResultType&)ret);\
1464 \
1465 JavaValue jvalue(Tag); \
1466 JNI_ArgumentPusherVaArg ap(methodID, args); \
1467 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK_0); \
1468 ret = jvalue.get_##ResultType(); \
1469 return ret;\
1470 JNI_END
1471
1472 // the runtime type of subword integral basic types is integer
1473 DEFINE_CALLMETHODV(jboolean, Boolean, T_BOOLEAN
1474 , HOTSPOT_JNI_CALLBOOLEANMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1475 HOTSPOT_JNI_CALLBOOLEANMETHODV_RETURN(_ret_ref))
1476 DEFINE_CALLMETHODV(jbyte, Byte, T_BYTE
1477 , HOTSPOT_JNI_CALLBYTEMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1478 HOTSPOT_JNI_CALLBYTEMETHODV_RETURN(_ret_ref))
1479 DEFINE_CALLMETHODV(jchar, Char, T_CHAR
1480 , HOTSPOT_JNI_CALLCHARMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1481 HOTSPOT_JNI_CALLCHARMETHODV_RETURN(_ret_ref))
1482 DEFINE_CALLMETHODV(jshort, Short, T_SHORT
1483 , HOTSPOT_JNI_CALLSHORTMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1484 HOTSPOT_JNI_CALLSHORTMETHODV_RETURN(_ret_ref))
1485
1486 DEFINE_CALLMETHODV(jobject, Object, T_OBJECT
1487 , HOTSPOT_JNI_CALLOBJECTMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1488 HOTSPOT_JNI_CALLOBJECTMETHODV_RETURN(_ret_ref))
1489 DEFINE_CALLMETHODV(jint, Int, T_INT,
1490 HOTSPOT_JNI_CALLINTMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1491 HOTSPOT_JNI_CALLINTMETHODV_RETURN(_ret_ref))
1492 DEFINE_CALLMETHODV(jlong, Long, T_LONG
1493 , HOTSPOT_JNI_CALLLONGMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1494 HOTSPOT_JNI_CALLLONGMETHODV_RETURN(_ret_ref))
1495 // Float and double probes don't return value because dtrace doesn't currently support it
1496 DEFINE_CALLMETHODV(jfloat, Float, T_FLOAT
1497 , HOTSPOT_JNI_CALLFLOATMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1498 HOTSPOT_JNI_CALLFLOATMETHODV_RETURN())
1499 DEFINE_CALLMETHODV(jdouble, Double, T_DOUBLE
1500 , HOTSPOT_JNI_CALLDOUBLEMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1501 HOTSPOT_JNI_CALLDOUBLEMETHODV_RETURN())
1502
1503 #define DEFINE_CALLMETHODA(ResultType, Result, Tag \
1504 , EntryProbe, ReturnProbe) \
1505 \
1506 DT_RETURN_MARK_DECL_FOR(Result, Call##Result##MethodA, ResultType \
1507 , ReturnProbe); \
1508 \
1509 JNI_ENTRY(ResultType, \
1510 jni_Call##Result##MethodA(JNIEnv *env, jobject obj, jmethodID methodID, const jvalue *args)) \
1511 JNIWrapper("Call" XSTR(Result) "MethodA"); \
1512 EntryProbe; \
1513 ResultType ret = 0;\
1514 DT_RETURN_MARK_FOR(Result, Call##Result##MethodA, ResultType, \
1515 (const ResultType&)ret);\
1516 \
1517 JavaValue jvalue(Tag); \
1518 JNI_ArgumentPusherArray ap(methodID, args); \
1519 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK_0); \
1520 ret = jvalue.get_##ResultType(); \
1521 return ret;\
1522 JNI_END
1523
1524 // the runtime type of subword integral basic types is integer
1525 DEFINE_CALLMETHODA(jboolean, Boolean, T_BOOLEAN
1526 , HOTSPOT_JNI_CALLBOOLEANMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1527 HOTSPOT_JNI_CALLBOOLEANMETHODA_RETURN(_ret_ref))
1528 DEFINE_CALLMETHODA(jbyte, Byte, T_BYTE
1529 , HOTSPOT_JNI_CALLBYTEMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1530 HOTSPOT_JNI_CALLBYTEMETHODA_RETURN(_ret_ref))
1531 DEFINE_CALLMETHODA(jchar, Char, T_CHAR
1532 , HOTSPOT_JNI_CALLCHARMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1533 HOTSPOT_JNI_CALLCHARMETHODA_RETURN(_ret_ref))
1534 DEFINE_CALLMETHODA(jshort, Short, T_SHORT
1535 , HOTSPOT_JNI_CALLSHORTMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1536 HOTSPOT_JNI_CALLSHORTMETHODA_RETURN(_ret_ref))
1537
1538 DEFINE_CALLMETHODA(jobject, Object, T_OBJECT
1539 , HOTSPOT_JNI_CALLOBJECTMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1540 HOTSPOT_JNI_CALLOBJECTMETHODA_RETURN(_ret_ref))
1541 DEFINE_CALLMETHODA(jint, Int, T_INT,
1542 HOTSPOT_JNI_CALLINTMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1543 HOTSPOT_JNI_CALLINTMETHODA_RETURN(_ret_ref))
1544 DEFINE_CALLMETHODA(jlong, Long, T_LONG
1545 , HOTSPOT_JNI_CALLLONGMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1546 HOTSPOT_JNI_CALLLONGMETHODA_RETURN(_ret_ref))
1547 // Float and double probes don't return value because dtrace doesn't currently support it
1548 DEFINE_CALLMETHODA(jfloat, Float, T_FLOAT
1549 , HOTSPOT_JNI_CALLFLOATMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1550 HOTSPOT_JNI_CALLFLOATMETHODA_RETURN())
1551 DEFINE_CALLMETHODA(jdouble, Double, T_DOUBLE
1552 , HOTSPOT_JNI_CALLDOUBLEMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1553 HOTSPOT_JNI_CALLDOUBLEMETHODA_RETURN())
1554
1555 DT_VOID_RETURN_MARK_DECL(CallVoidMethod, HOTSPOT_JNI_CALLVOIDMETHOD_RETURN());
1556 DT_VOID_RETURN_MARK_DECL(CallVoidMethodV, HOTSPOT_JNI_CALLVOIDMETHODV_RETURN());
1557 DT_VOID_RETURN_MARK_DECL(CallVoidMethodA, HOTSPOT_JNI_CALLVOIDMETHODA_RETURN());
1558
1559
1560 JNI_ENTRY(void, jni_CallVoidMethod(JNIEnv *env, jobject obj, jmethodID methodID, ...))
1561 JNIWrapper("CallVoidMethod");
1562 HOTSPOT_JNI_CALLVOIDMETHOD_ENTRY(env, obj, (uintptr_t) methodID);
1563 DT_VOID_RETURN_MARK(CallVoidMethod);
1564
1565 va_list args;
1566 va_start(args, methodID);
1567 JavaValue jvalue(T_VOID);
1568 JNI_ArgumentPusherVaArg ap(methodID, args);
1569 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK);
1570 va_end(args);
1571 JNI_END
1572
1573
1574 JNI_ENTRY(void, jni_CallVoidMethodV(JNIEnv *env, jobject obj, jmethodID methodID, va_list args))
1575 JNIWrapper("CallVoidMethodV");
1576 HOTSPOT_JNI_CALLVOIDMETHODV_ENTRY(env, obj, (uintptr_t) methodID);
1577 DT_VOID_RETURN_MARK(CallVoidMethodV);
1578
1579 JavaValue jvalue(T_VOID);
1580 JNI_ArgumentPusherVaArg ap(methodID, args);
1581 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK);
1582 JNI_END
1583
1584
1585 JNI_ENTRY(void, jni_CallVoidMethodA(JNIEnv *env, jobject obj, jmethodID methodID, const jvalue *args))
1586 JNIWrapper("CallVoidMethodA");
1587 HOTSPOT_JNI_CALLVOIDMETHODA_ENTRY(env, obj, (uintptr_t) methodID);
1588 DT_VOID_RETURN_MARK(CallVoidMethodA);
1589
1590 JavaValue jvalue(T_VOID);
1591 JNI_ArgumentPusherArray ap(methodID, args);
1592 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK);
1593 JNI_END
1594
1595
1596
1597 #define DEFINE_CALLNONVIRTUALMETHOD(ResultType, Result, Tag \
1598 , EntryProbe, ReturnProbe) \
1599 \
1600 DT_RETURN_MARK_DECL_FOR(Result, CallNonvirtual##Result##Method, ResultType \
1601 , ReturnProbe);\
1602 \
1603 JNI_ENTRY(ResultType, \
1604 jni_CallNonvirtual##Result##Method(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, ...)) \
1605 JNIWrapper("CallNonvitual" XSTR(Result) "Method"); \
1606 \
1607 EntryProbe;\
1608 ResultType ret;\
1609 DT_RETURN_MARK_FOR(Result, CallNonvirtual##Result##Method, ResultType, \
1610 (const ResultType&)ret);\
1611 \
1612 va_list args; \
1613 va_start(args, methodID); \
1614 JavaValue jvalue(Tag); \
1615 JNI_ArgumentPusherVaArg ap(methodID, args); \
1616 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_0); \
1617 va_end(args); \
1618 ret = jvalue.get_##ResultType(); \
1619 return ret;\
1620 JNI_END
1621
1622 // the runtime type of subword integral basic types is integer
1623 DEFINE_CALLNONVIRTUALMETHOD(jboolean, Boolean, T_BOOLEAN
1624 , HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1625 HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHOD_RETURN(_ret_ref))
1626 DEFINE_CALLNONVIRTUALMETHOD(jbyte, Byte, T_BYTE
1627 , HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1628 HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHOD_RETURN(_ret_ref))
1629 DEFINE_CALLNONVIRTUALMETHOD(jchar, Char, T_CHAR
1630 , HOTSPOT_JNI_CALLNONVIRTUALCHARMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1631 HOTSPOT_JNI_CALLNONVIRTUALCHARMETHOD_RETURN(_ret_ref))
1632 DEFINE_CALLNONVIRTUALMETHOD(jshort, Short, T_SHORT
1633 , HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1634 HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHOD_RETURN(_ret_ref))
1635
1636 DEFINE_CALLNONVIRTUALMETHOD(jobject, Object, T_OBJECT
1637 , HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1638 HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHOD_RETURN(_ret_ref))
1639 DEFINE_CALLNONVIRTUALMETHOD(jint, Int, T_INT
1640 , HOTSPOT_JNI_CALLNONVIRTUALINTMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1641 HOTSPOT_JNI_CALLNONVIRTUALINTMETHOD_RETURN(_ret_ref))
1642 DEFINE_CALLNONVIRTUALMETHOD(jlong, Long, T_LONG
1643 , HOTSPOT_JNI_CALLNONVIRTUALLONGMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1644 // Float and double probes don't return value because dtrace doesn't currently support it
1645 HOTSPOT_JNI_CALLNONVIRTUALLONGMETHOD_RETURN(_ret_ref))
1646 DEFINE_CALLNONVIRTUALMETHOD(jfloat, Float, T_FLOAT
1647 , HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1648 HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHOD_RETURN())
1649 DEFINE_CALLNONVIRTUALMETHOD(jdouble, Double, T_DOUBLE
1650 , HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1651 HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHOD_RETURN())
1652
1653 #define DEFINE_CALLNONVIRTUALMETHODV(ResultType, Result, Tag \
1654 , EntryProbe, ReturnProbe) \
1655 \
1656 DT_RETURN_MARK_DECL_FOR(Result, CallNonvirtual##Result##MethodV, ResultType \
1657 , ReturnProbe);\
1658 \
1659 JNI_ENTRY(ResultType, \
1660 jni_CallNonvirtual##Result##MethodV(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, va_list args)) \
1661 JNIWrapper("CallNonvitual" XSTR(Result) "MethodV"); \
1662 \
1663 EntryProbe;\
1664 ResultType ret;\
1665 DT_RETURN_MARK_FOR(Result, CallNonvirtual##Result##MethodV, ResultType, \
1666 (const ResultType&)ret);\
1667 \
1668 JavaValue jvalue(Tag); \
1669 JNI_ArgumentPusherVaArg ap(methodID, args); \
1670 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_0); \
1671 ret = jvalue.get_##ResultType(); \
1672 return ret;\
1673 JNI_END
1674
1675 // the runtime type of subword integral basic types is integer
1676 DEFINE_CALLNONVIRTUALMETHODV(jboolean, Boolean, T_BOOLEAN
1677 , HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1678 HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHODV_RETURN(_ret_ref))
1679 DEFINE_CALLNONVIRTUALMETHODV(jbyte, Byte, T_BYTE
1680 , HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1681 HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHODV_RETURN(_ret_ref))
1682 DEFINE_CALLNONVIRTUALMETHODV(jchar, Char, T_CHAR
1683 , HOTSPOT_JNI_CALLNONVIRTUALCHARMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1684 HOTSPOT_JNI_CALLNONVIRTUALCHARMETHODV_RETURN(_ret_ref))
1685 DEFINE_CALLNONVIRTUALMETHODV(jshort, Short, T_SHORT
1686 , HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1687 HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHODV_RETURN(_ret_ref))
1688
1689 DEFINE_CALLNONVIRTUALMETHODV(jobject, Object, T_OBJECT
1690 , HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1691 HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHODV_RETURN(_ret_ref))
1692 DEFINE_CALLNONVIRTUALMETHODV(jint, Int, T_INT
1693 , HOTSPOT_JNI_CALLNONVIRTUALINTMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1694 HOTSPOT_JNI_CALLNONVIRTUALINTMETHODV_RETURN(_ret_ref))
1695 DEFINE_CALLNONVIRTUALMETHODV(jlong, Long, T_LONG
1696 , HOTSPOT_JNI_CALLNONVIRTUALLONGMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1697 // Float and double probes don't return value because dtrace doesn't currently support it
1698 HOTSPOT_JNI_CALLNONVIRTUALLONGMETHODV_RETURN(_ret_ref))
1699 DEFINE_CALLNONVIRTUALMETHODV(jfloat, Float, T_FLOAT
1700 , HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1701 HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHODV_RETURN())
1702 DEFINE_CALLNONVIRTUALMETHODV(jdouble, Double, T_DOUBLE
1703 , HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1704 HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHODV_RETURN())
1705
1706 #define DEFINE_CALLNONVIRTUALMETHODA(ResultType, Result, Tag \
1707 , EntryProbe, ReturnProbe) \
1708 \
1709 DT_RETURN_MARK_DECL_FOR(Result, CallNonvirtual##Result##MethodA, ResultType \
1710 , ReturnProbe);\
1711 \
1712 JNI_ENTRY(ResultType, \
1713 jni_CallNonvirtual##Result##MethodA(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, const jvalue *args)) \
1714 JNIWrapper("CallNonvitual" XSTR(Result) "MethodA"); \
1715 \
1716 EntryProbe;\
1717 ResultType ret;\
1718 DT_RETURN_MARK_FOR(Result, CallNonvirtual##Result##MethodA, ResultType, \
1719 (const ResultType&)ret);\
1720 \
1721 JavaValue jvalue(Tag); \
1722 JNI_ArgumentPusherArray ap(methodID, args); \
1723 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_0); \
1724 ret = jvalue.get_##ResultType(); \
1725 return ret;\
1726 JNI_END
1727
1728 // the runtime type of subword integral basic types is integer
1729 DEFINE_CALLNONVIRTUALMETHODA(jboolean, Boolean, T_BOOLEAN
1730 , HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1731 HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHODA_RETURN(_ret_ref))
1732 DEFINE_CALLNONVIRTUALMETHODA(jbyte, Byte, T_BYTE
1733 , HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1734 HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHODA_RETURN(_ret_ref))
1735 DEFINE_CALLNONVIRTUALMETHODA(jchar, Char, T_CHAR
1736 , HOTSPOT_JNI_CALLNONVIRTUALCHARMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1737 HOTSPOT_JNI_CALLNONVIRTUALCHARMETHODA_RETURN(_ret_ref))
1738 DEFINE_CALLNONVIRTUALMETHODA(jshort, Short, T_SHORT
1739 , HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1740 HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHODA_RETURN(_ret_ref))
1741
1742 DEFINE_CALLNONVIRTUALMETHODA(jobject, Object, T_OBJECT
1743 , HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1744 HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHODA_RETURN(_ret_ref))
1745 DEFINE_CALLNONVIRTUALMETHODA(jint, Int, T_INT
1746 , HOTSPOT_JNI_CALLNONVIRTUALINTMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1747 HOTSPOT_JNI_CALLNONVIRTUALINTMETHODA_RETURN(_ret_ref))
1748 DEFINE_CALLNONVIRTUALMETHODA(jlong, Long, T_LONG
1749 , HOTSPOT_JNI_CALLNONVIRTUALLONGMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1750 // Float and double probes don't return value because dtrace doesn't currently support it
1751 HOTSPOT_JNI_CALLNONVIRTUALLONGMETHODA_RETURN(_ret_ref))
1752 DEFINE_CALLNONVIRTUALMETHODA(jfloat, Float, T_FLOAT
1753 , HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1754 HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHODA_RETURN())
1755 DEFINE_CALLNONVIRTUALMETHODA(jdouble, Double, T_DOUBLE
1756 , HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1757 HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHODA_RETURN())
1758
1759 DT_VOID_RETURN_MARK_DECL(CallNonvirtualVoidMethod
1760 , HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHOD_RETURN());
1761 DT_VOID_RETURN_MARK_DECL(CallNonvirtualVoidMethodV
1762 , HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHODV_RETURN());
1763 DT_VOID_RETURN_MARK_DECL(CallNonvirtualVoidMethodA
1764 , HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHODA_RETURN());
1765
1766 JNI_ENTRY(void, jni_CallNonvirtualVoidMethod(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, ...))
1767 JNIWrapper("CallNonvirtualVoidMethod");
1768
1769 HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHOD_ENTRY(env, obj, cls, (uintptr_t) methodID);
1770 DT_VOID_RETURN_MARK(CallNonvirtualVoidMethod);
1771
1772 va_list args;
1773 va_start(args, methodID);
1774 JavaValue jvalue(T_VOID);
1775 JNI_ArgumentPusherVaArg ap(methodID, args);
1776 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK);
1777 va_end(args);
1778 JNI_END
1779
1780
1781 JNI_ENTRY(void, jni_CallNonvirtualVoidMethodV(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, va_list args))
1782 JNIWrapper("CallNonvirtualVoidMethodV");
1783
1784 HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHODV_ENTRY(
1785 env, obj, cls, (uintptr_t) methodID);
1786 DT_VOID_RETURN_MARK(CallNonvirtualVoidMethodV);
1787
1788 JavaValue jvalue(T_VOID);
1789 JNI_ArgumentPusherVaArg ap(methodID, args);
1790 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK);
1791 JNI_END
1792
1793
1794 JNI_ENTRY(void, jni_CallNonvirtualVoidMethodA(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, const jvalue *args))
1795 JNIWrapper("CallNonvirtualVoidMethodA");
1796 HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHODA_ENTRY(
1797 env, obj, cls, (uintptr_t) methodID);
1798 DT_VOID_RETURN_MARK(CallNonvirtualVoidMethodA);
1799 JavaValue jvalue(T_VOID);
1800 JNI_ArgumentPusherArray ap(methodID, args);
1801 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK);
1802 JNI_END
1803
1804
1805
1806 #define DEFINE_CALLSTATICMETHOD(ResultType, Result, Tag \
1807 , EntryProbe, ResultProbe) \
1808 \
1809 DT_RETURN_MARK_DECL_FOR(Result, CallStatic##Result##Method, ResultType \
1810 , ResultProbe); \
1811 \
1812 JNI_ENTRY(ResultType, \
1813 jni_CallStatic##Result##Method(JNIEnv *env, jclass cls, jmethodID methodID, ...)) \
1814 JNIWrapper("CallStatic" XSTR(Result) "Method"); \
1815 \
1816 EntryProbe; \
1817 ResultType ret = 0;\
1818 DT_RETURN_MARK_FOR(Result, CallStatic##Result##Method, ResultType, \
1819 (const ResultType&)ret);\
1820 \
1821 va_list args; \
1822 va_start(args, methodID); \
1823 JavaValue jvalue(Tag); \
1824 JNI_ArgumentPusherVaArg ap(methodID, args); \
1825 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK_0); \
1826 va_end(args); \
1827 ret = jvalue.get_##ResultType(); \
1828 return ret;\
1829 JNI_END
1830
1831 // the runtime type of subword integral basic types is integer
1832 DEFINE_CALLSTATICMETHOD(jboolean, Boolean, T_BOOLEAN
1833 , HOTSPOT_JNI_CALLSTATICBOOLEANMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1834 HOTSPOT_JNI_CALLSTATICBOOLEANMETHOD_RETURN(_ret_ref));
1835 DEFINE_CALLSTATICMETHOD(jbyte, Byte, T_BYTE
1836 , HOTSPOT_JNI_CALLSTATICBYTEMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1837 HOTSPOT_JNI_CALLSTATICBYTEMETHOD_RETURN(_ret_ref));
1838 DEFINE_CALLSTATICMETHOD(jchar, Char, T_CHAR
1839 , HOTSPOT_JNI_CALLSTATICCHARMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1840 HOTSPOT_JNI_CALLSTATICCHARMETHOD_RETURN(_ret_ref));
1841 DEFINE_CALLSTATICMETHOD(jshort, Short, T_SHORT
1842 , HOTSPOT_JNI_CALLSTATICSHORTMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1843 HOTSPOT_JNI_CALLSTATICSHORTMETHOD_RETURN(_ret_ref));
1844
1845 DEFINE_CALLSTATICMETHOD(jobject, Object, T_OBJECT
1846 , HOTSPOT_JNI_CALLSTATICOBJECTMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1847 HOTSPOT_JNI_CALLSTATICOBJECTMETHOD_RETURN(_ret_ref));
1848 DEFINE_CALLSTATICMETHOD(jint, Int, T_INT
1849 , HOTSPOT_JNI_CALLSTATICINTMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1850 HOTSPOT_JNI_CALLSTATICINTMETHOD_RETURN(_ret_ref));
1851 DEFINE_CALLSTATICMETHOD(jlong, Long, T_LONG
1852 , HOTSPOT_JNI_CALLSTATICLONGMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1853 HOTSPOT_JNI_CALLSTATICLONGMETHOD_RETURN(_ret_ref));
1854 // Float and double probes don't return value because dtrace doesn't currently support it
1855 DEFINE_CALLSTATICMETHOD(jfloat, Float, T_FLOAT
1856 , HOTSPOT_JNI_CALLSTATICFLOATMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1857 HOTSPOT_JNI_CALLSTATICFLOATMETHOD_RETURN());
1858 DEFINE_CALLSTATICMETHOD(jdouble, Double, T_DOUBLE
1859 , HOTSPOT_JNI_CALLSTATICDOUBLEMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1860 HOTSPOT_JNI_CALLSTATICDOUBLEMETHOD_RETURN());
1861
1862 #define DEFINE_CALLSTATICMETHODV(ResultType, Result, Tag \
1863 , EntryProbe, ResultProbe) \
1864 \
1865 DT_RETURN_MARK_DECL_FOR(Result, CallStatic##Result##MethodV, ResultType \
1866 , ResultProbe); \
1867 \
1868 JNI_ENTRY(ResultType, \
1869 jni_CallStatic##Result##MethodV(JNIEnv *env, jclass cls, jmethodID methodID, va_list args)) \
1870 JNIWrapper("CallStatic" XSTR(Result) "MethodV"); \
1871 \
1872 EntryProbe; \
1873 ResultType ret = 0;\
1874 DT_RETURN_MARK_FOR(Result, CallStatic##Result##MethodV, ResultType, \
1875 (const ResultType&)ret);\
1876 \
1877 JavaValue jvalue(Tag); \
1878 JNI_ArgumentPusherVaArg ap(methodID, args); \
1879 /* Make sure class is initialized before trying to invoke its method */ \
1880 KlassHandle k(THREAD, java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls))); \
1881 k()->initialize(CHECK_0); \
1882 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK_0); \
1883 va_end(args); \
1884 ret = jvalue.get_##ResultType(); \
1885 return ret;\
1886 JNI_END
1887
1888 // the runtime type of subword integral basic types is integer
1889 DEFINE_CALLSTATICMETHODV(jboolean, Boolean, T_BOOLEAN
1890 , HOTSPOT_JNI_CALLSTATICBOOLEANMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1891 HOTSPOT_JNI_CALLSTATICBOOLEANMETHODV_RETURN(_ret_ref));
1892 DEFINE_CALLSTATICMETHODV(jbyte, Byte, T_BYTE
1893 , HOTSPOT_JNI_CALLSTATICBYTEMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1894 HOTSPOT_JNI_CALLSTATICBYTEMETHODV_RETURN(_ret_ref));
1895 DEFINE_CALLSTATICMETHODV(jchar, Char, T_CHAR
1896 , HOTSPOT_JNI_CALLSTATICCHARMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1897 HOTSPOT_JNI_CALLSTATICCHARMETHODV_RETURN(_ret_ref));
1898 DEFINE_CALLSTATICMETHODV(jshort, Short, T_SHORT
1899 , HOTSPOT_JNI_CALLSTATICSHORTMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1900 HOTSPOT_JNI_CALLSTATICSHORTMETHODV_RETURN(_ret_ref));
1901
1902 DEFINE_CALLSTATICMETHODV(jobject, Object, T_OBJECT
1903 , HOTSPOT_JNI_CALLSTATICOBJECTMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1904 HOTSPOT_JNI_CALLSTATICOBJECTMETHODV_RETURN(_ret_ref));
1905 DEFINE_CALLSTATICMETHODV(jint, Int, T_INT
1906 , HOTSPOT_JNI_CALLSTATICINTMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1907 HOTSPOT_JNI_CALLSTATICINTMETHODV_RETURN(_ret_ref));
1908 DEFINE_CALLSTATICMETHODV(jlong, Long, T_LONG
1909 , HOTSPOT_JNI_CALLSTATICLONGMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1910 HOTSPOT_JNI_CALLSTATICLONGMETHODV_RETURN(_ret_ref));
1911 // Float and double probes don't return value because dtrace doesn't currently support it
1912 DEFINE_CALLSTATICMETHODV(jfloat, Float, T_FLOAT
1913 , HOTSPOT_JNI_CALLSTATICFLOATMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1914 HOTSPOT_JNI_CALLSTATICFLOATMETHODV_RETURN());
1915 DEFINE_CALLSTATICMETHODV(jdouble, Double, T_DOUBLE
1916 , HOTSPOT_JNI_CALLSTATICDOUBLEMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1917 HOTSPOT_JNI_CALLSTATICDOUBLEMETHODV_RETURN());
1918
1919 #define DEFINE_CALLSTATICMETHODA(ResultType, Result, Tag \
1920 , EntryProbe, ResultProbe) \
1921 \
1922 DT_RETURN_MARK_DECL_FOR(Result, CallStatic##Result##MethodA, ResultType \
1923 , ResultProbe); \
1924 \
1925 JNI_ENTRY(ResultType, \
1926 jni_CallStatic##Result##MethodA(JNIEnv *env, jclass cls, jmethodID methodID, const jvalue *args)) \
1927 JNIWrapper("CallStatic" XSTR(Result) "MethodA"); \
1928 \
1929 EntryProbe; \
1930 ResultType ret = 0;\
1931 DT_RETURN_MARK_FOR(Result, CallStatic##Result##MethodA, ResultType, \
1932 (const ResultType&)ret);\
1933 \
1934 JavaValue jvalue(Tag); \
1935 JNI_ArgumentPusherArray ap(methodID, args); \
1936 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK_0); \
1937 ret = jvalue.get_##ResultType(); \
1938 return ret;\
1939 JNI_END
1940
1941 // the runtime type of subword integral basic types is integer
1942 DEFINE_CALLSTATICMETHODA(jboolean, Boolean, T_BOOLEAN
1943 , HOTSPOT_JNI_CALLSTATICBOOLEANMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1944 HOTSPOT_JNI_CALLSTATICBOOLEANMETHODA_RETURN(_ret_ref));
1945 DEFINE_CALLSTATICMETHODA(jbyte, Byte, T_BYTE
1946 , HOTSPOT_JNI_CALLSTATICBYTEMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1947 HOTSPOT_JNI_CALLSTATICBYTEMETHODA_RETURN(_ret_ref));
1948 DEFINE_CALLSTATICMETHODA(jchar, Char, T_CHAR
1949 , HOTSPOT_JNI_CALLSTATICCHARMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1950 HOTSPOT_JNI_CALLSTATICCHARMETHODA_RETURN(_ret_ref));
1951 DEFINE_CALLSTATICMETHODA(jshort, Short, T_SHORT
1952 , HOTSPOT_JNI_CALLSTATICSHORTMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1953 HOTSPOT_JNI_CALLSTATICSHORTMETHODA_RETURN(_ret_ref));
1954
1955 DEFINE_CALLSTATICMETHODA(jobject, Object, T_OBJECT
1956 , HOTSPOT_JNI_CALLSTATICOBJECTMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1957 HOTSPOT_JNI_CALLSTATICOBJECTMETHODA_RETURN(_ret_ref));
1958 DEFINE_CALLSTATICMETHODA(jint, Int, T_INT
1959 , HOTSPOT_JNI_CALLSTATICINTMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1960 HOTSPOT_JNI_CALLSTATICINTMETHODA_RETURN(_ret_ref));
1961 DEFINE_CALLSTATICMETHODA(jlong, Long, T_LONG
1962 , HOTSPOT_JNI_CALLSTATICLONGMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1963 HOTSPOT_JNI_CALLSTATICLONGMETHODA_RETURN(_ret_ref));
1964 // Float and double probes don't return value because dtrace doesn't currently support it
1965 DEFINE_CALLSTATICMETHODA(jfloat, Float, T_FLOAT
1966 , HOTSPOT_JNI_CALLSTATICFLOATMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1967 HOTSPOT_JNI_CALLSTATICFLOATMETHODA_RETURN());
1968 DEFINE_CALLSTATICMETHODA(jdouble, Double, T_DOUBLE
1969 , HOTSPOT_JNI_CALLSTATICDOUBLEMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1970 HOTSPOT_JNI_CALLSTATICDOUBLEMETHODA_RETURN());
1971
1972 DT_VOID_RETURN_MARK_DECL(CallStaticVoidMethod
1973 , HOTSPOT_JNI_CALLSTATICVOIDMETHOD_RETURN());
1974 DT_VOID_RETURN_MARK_DECL(CallStaticVoidMethodV
1975 , HOTSPOT_JNI_CALLSTATICVOIDMETHODV_RETURN());
1976 DT_VOID_RETURN_MARK_DECL(CallStaticVoidMethodA
1977 , HOTSPOT_JNI_CALLSTATICVOIDMETHODA_RETURN());
1978
1979 JNI_ENTRY(void, jni_CallStaticVoidMethod(JNIEnv *env, jclass cls, jmethodID methodID, ...))
1980 JNIWrapper("CallStaticVoidMethod");
1981 HOTSPOT_JNI_CALLSTATICVOIDMETHOD_ENTRY(env, cls, (uintptr_t) methodID);
1982 DT_VOID_RETURN_MARK(CallStaticVoidMethod);
1983
1984 va_list args;
1985 va_start(args, methodID);
1986 JavaValue jvalue(T_VOID);
1987 JNI_ArgumentPusherVaArg ap(methodID, args);
1988 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK);
1989 va_end(args);
1990 JNI_END
1991
1992
1993 JNI_ENTRY(void, jni_CallStaticVoidMethodV(JNIEnv *env, jclass cls, jmethodID methodID, va_list args))
1994 JNIWrapper("CallStaticVoidMethodV");
1995 HOTSPOT_JNI_CALLSTATICVOIDMETHODV_ENTRY(env, cls, (uintptr_t) methodID);
1996 DT_VOID_RETURN_MARK(CallStaticVoidMethodV);
1997
1998 JavaValue jvalue(T_VOID);
1999 JNI_ArgumentPusherVaArg ap(methodID, args);
2000 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK);
2001 JNI_END
2002
2003
2004 JNI_ENTRY(void, jni_CallStaticVoidMethodA(JNIEnv *env, jclass cls, jmethodID methodID, const jvalue *args))
2005 JNIWrapper("CallStaticVoidMethodA");
2006 HOTSPOT_JNI_CALLSTATICVOIDMETHODA_ENTRY(env, cls, (uintptr_t) methodID);
2007 DT_VOID_RETURN_MARK(CallStaticVoidMethodA);
2008
2009 JavaValue jvalue(T_VOID);
2010 JNI_ArgumentPusherArray ap(methodID, args);
2011 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK);
2012 JNI_END
2013
2014
2015 //
2016 // Accessing Fields
2017 //
2018
2019
2020 DT_RETURN_MARK_DECL(GetFieldID, jfieldID
2021 , HOTSPOT_JNI_GETFIELDID_RETURN((uintptr_t)_ret_ref));
2022
2023 JNI_ENTRY(jfieldID, jni_GetFieldID(JNIEnv *env, jclass clazz,
2024 const char *name, const char *sig))
2025 JNIWrapper("GetFieldID");
2026 HOTSPOT_JNI_GETFIELDID_ENTRY(env, clazz, (char *) name, (char *) sig);
2027 jfieldID ret = 0;
2028 DT_RETURN_MARK(GetFieldID, jfieldID, (const jfieldID&)ret);
2029
2030 // The class should have been loaded (we have an instance of the class
2031 // passed in) so the field and signature should already be in the symbol
2032 // table. If they're not there, the field doesn't exist.
2033 TempNewSymbol fieldname = SymbolTable::probe(name, (int)strlen(name));
2034 TempNewSymbol signame = SymbolTable::probe(sig, (int)strlen(sig));
2035 if (fieldname == NULL || signame == NULL) {
2036 THROW_MSG_0(vmSymbols::java_lang_NoSuchFieldError(), (char*) name);
2037 }
2038 KlassHandle k(THREAD,
2039 java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz)));
2040 // Make sure class is initialized before handing id's out to fields
2041 k()->initialize(CHECK_NULL);
2042
2043 fieldDescriptor fd;
2044 if (!k()->oop_is_instance() ||
2045 !InstanceKlass::cast(k())->find_field(fieldname, signame, false, &fd)) {
2046 THROW_MSG_0(vmSymbols::java_lang_NoSuchFieldError(), (char*) name);
2047 }
2048
2049 // A jfieldID for a non-static field is simply the offset of the field within the instanceOop
2050 // It may also have hash bits for k, if VerifyJNIFields is turned on.
2051 ret = jfieldIDWorkaround::to_instance_jfieldID(k(), fd.offset());
2052 return ret;
2053 JNI_END
2054
2055
2056 JNI_ENTRY(jobject, jni_GetObjectField(JNIEnv *env, jobject obj, jfieldID fieldID))
2057 JNIWrapper("GetObjectField");
2058 HOTSPOT_JNI_GETOBJECTFIELD_ENTRY(env, obj, (uintptr_t) fieldID);
2059 oop o = JNIHandles::resolve_non_null(obj);
2060 Klass* k = o->klass();
2061 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID);
2062 // Keep JVMTI addition small and only check enabled flag here.
2063 // jni_GetField_probe() assumes that is okay to create handles.
2064 if (JvmtiExport::should_post_field_access()) {
2065 o = JvmtiExport::jni_GetField_probe(thread, obj, o, k, fieldID, false);
2066 }
2067 jobject ret = JNIHandles::make_local(env, o->obj_field(offset));
2068 #if INCLUDE_ALL_GCS
2069 // If G1 is enabled and we are accessing the value of the referent
2070 // field in a reference object then we need to register a non-null
2071 // referent with the SATB barrier.
2072 if (UseG1GC) {
2073 bool needs_barrier = false;
2074
2075 if (ret != NULL &&
2076 offset == java_lang_ref_Reference::referent_offset &&
2077 InstanceKlass::cast(k)->reference_type() != REF_NONE) {
2078 assert(InstanceKlass::cast(k)->is_subclass_of(SystemDictionary::Reference_klass()), "sanity");
2079 needs_barrier = true;
2080 }
2081
2082 if (needs_barrier) {
2083 oop referent = JNIHandles::resolve(ret);
2084 G1SATBCardTableModRefBS::enqueue(referent);
2085 }
2086 }
2087 #endif // INCLUDE_ALL_GCS
2088 HOTSPOT_JNI_GETOBJECTFIELD_RETURN(ret);
2089 return ret;
2090 JNI_END
2091
2092
2093
2094 #define DEFINE_GETFIELD(Return,Fieldname,Result \
2095 , EntryProbe, ReturnProbe) \
2096 \
2097 DT_RETURN_MARK_DECL_FOR(Result, Get##Result##Field, Return \
2098 , ReturnProbe); \
2099 \
2100 JNI_QUICK_ENTRY(Return, jni_Get##Result##Field(JNIEnv *env, jobject obj, jfieldID fieldID)) \
2101 JNIWrapper("Get" XSTR(Result) "Field"); \
2102 \
2103 EntryProbe; \
2104 Return ret = 0;\
2105 DT_RETURN_MARK_FOR(Result, Get##Result##Field, Return, (const Return&)ret);\
2106 \
2107 oop o = JNIHandles::resolve_non_null(obj); \
2108 Klass* k = o->klass(); \
2109 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID); \
2110 /* Keep JVMTI addition small and only check enabled flag here. */ \
2111 /* jni_GetField_probe_nh() assumes that is not okay to create handles */ \
2112 /* and creates a ResetNoHandleMark. */ \
2113 if (JvmtiExport::should_post_field_access()) { \
2114 o = JvmtiExport::jni_GetField_probe_nh(thread, obj, o, k, fieldID, false); \
2115 } \
2116 ret = o->Fieldname##_field(offset); \
2117 return ret; \
2118 JNI_END
2119
2120 DEFINE_GETFIELD(jboolean, bool, Boolean
2121 , HOTSPOT_JNI_GETBOOLEANFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2122 HOTSPOT_JNI_GETBOOLEANFIELD_RETURN(_ret_ref))
2123 DEFINE_GETFIELD(jbyte, byte, Byte
2124 , HOTSPOT_JNI_GETBYTEFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2125 HOTSPOT_JNI_GETBYTEFIELD_RETURN(_ret_ref))
2126 DEFINE_GETFIELD(jchar, char, Char
2127 , HOTSPOT_JNI_GETCHARFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2128 HOTSPOT_JNI_GETCHARFIELD_RETURN(_ret_ref))
2129 DEFINE_GETFIELD(jshort, short, Short
2130 , HOTSPOT_JNI_GETSHORTFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2131 HOTSPOT_JNI_GETSHORTFIELD_RETURN(_ret_ref))
2132 DEFINE_GETFIELD(jint, int, Int
2133 , HOTSPOT_JNI_GETINTFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2134 HOTSPOT_JNI_GETINTFIELD_RETURN(_ret_ref))
2135 DEFINE_GETFIELD(jlong, long, Long
2136 , HOTSPOT_JNI_GETLONGFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2137 HOTSPOT_JNI_GETLONGFIELD_RETURN(_ret_ref))
2138 // Float and double probes don't return value because dtrace doesn't currently support it
2139 DEFINE_GETFIELD(jfloat, float, Float
2140 , HOTSPOT_JNI_GETFLOATFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2141 HOTSPOT_JNI_GETFLOATFIELD_RETURN())
2142 DEFINE_GETFIELD(jdouble, double, Double
2143 , HOTSPOT_JNI_GETDOUBLEFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2144 HOTSPOT_JNI_GETDOUBLEFIELD_RETURN())
2145
2146 address jni_GetBooleanField_addr() {
2147 return (address)jni_GetBooleanField;
2148 }
2149 address jni_GetByteField_addr() {
2150 return (address)jni_GetByteField;
2151 }
2152 address jni_GetCharField_addr() {
2153 return (address)jni_GetCharField;
2154 }
2155 address jni_GetShortField_addr() {
2156 return (address)jni_GetShortField;
2157 }
2158 address jni_GetIntField_addr() {
2159 return (address)jni_GetIntField;
2160 }
2161 address jni_GetLongField_addr() {
2162 return (address)jni_GetLongField;
2163 }
2164 address jni_GetFloatField_addr() {
2165 return (address)jni_GetFloatField;
2166 }
2167 address jni_GetDoubleField_addr() {
2168 return (address)jni_GetDoubleField;
2169 }
2170
2171 JNI_QUICK_ENTRY(void, jni_SetObjectField(JNIEnv *env, jobject obj, jfieldID fieldID, jobject value))
2172 JNIWrapper("SetObjectField");
2173 HOTSPOT_JNI_SETOBJECTFIELD_ENTRY(env, obj, (uintptr_t) fieldID, value);
2174 oop o = JNIHandles::resolve_non_null(obj);
2175 Klass* k = o->klass();
2176 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID);
2177 // Keep JVMTI addition small and only check enabled flag here.
2178 // jni_SetField_probe_nh() assumes that is not okay to create handles
2179 // and creates a ResetNoHandleMark.
2180 if (JvmtiExport::should_post_field_modification()) {
2181 jvalue field_value;
2182 field_value.l = value;
2183 o = JvmtiExport::jni_SetField_probe_nh(thread, obj, o, k, fieldID, false, 'L', (jvalue *)&field_value);
2184 }
2185 o->obj_field_put(offset, JNIHandles::resolve(value));
2186 HOTSPOT_JNI_SETOBJECTFIELD_RETURN();
2187 JNI_END
2188
2189
2190 #define DEFINE_SETFIELD(Argument,Fieldname,Result,SigType,unionType \
2191 , EntryProbe, ReturnProbe) \
2192 \
2193 JNI_QUICK_ENTRY(void, jni_Set##Result##Field(JNIEnv *env, jobject obj, jfieldID fieldID, Argument value)) \
2194 JNIWrapper("Set" XSTR(Result) "Field"); \
2195 \
2196 EntryProbe; \
2197 \
2198 oop o = JNIHandles::resolve_non_null(obj); \
2199 Klass* k = o->klass(); \
2200 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID); \
2201 /* Keep JVMTI addition small and only check enabled flag here. */ \
2202 /* jni_SetField_probe_nh() assumes that is not okay to create handles */ \
2203 /* and creates a ResetNoHandleMark. */ \
2204 if (JvmtiExport::should_post_field_modification()) { \
2205 jvalue field_value; \
2206 field_value.unionType = value; \
2207 o = JvmtiExport::jni_SetField_probe_nh(thread, obj, o, k, fieldID, false, SigType, (jvalue *)&field_value); \
2208 } \
2209 o->Fieldname##_field_put(offset, value); \
2210 ReturnProbe; \
2211 JNI_END
2212
2213 DEFINE_SETFIELD(jboolean, bool, Boolean, 'Z', z
2214 , HOTSPOT_JNI_SETBOOLEANFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value),
2215 HOTSPOT_JNI_SETBOOLEANFIELD_RETURN())
2216 DEFINE_SETFIELD(jbyte, byte, Byte, 'B', b
2217 , HOTSPOT_JNI_SETBYTEFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value),
2218 HOTSPOT_JNI_SETBYTEFIELD_RETURN())
2219 DEFINE_SETFIELD(jchar, char, Char, 'C', c
2220 , HOTSPOT_JNI_SETCHARFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value),
2221 HOTSPOT_JNI_SETCHARFIELD_RETURN())
2222 DEFINE_SETFIELD(jshort, short, Short, 'S', s
2223 , HOTSPOT_JNI_SETSHORTFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value),
2224 HOTSPOT_JNI_SETSHORTFIELD_RETURN())
2225 DEFINE_SETFIELD(jint, int, Int, 'I', i
2226 , HOTSPOT_JNI_SETINTFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value),
2227 HOTSPOT_JNI_SETINTFIELD_RETURN())
2228 DEFINE_SETFIELD(jlong, long, Long, 'J', j
2229 , HOTSPOT_JNI_SETLONGFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value),
2230 HOTSPOT_JNI_SETLONGFIELD_RETURN())
2231 // Float and double probes don't return value because dtrace doesn't currently support it
2232 DEFINE_SETFIELD(jfloat, float, Float, 'F', f
2233 , HOTSPOT_JNI_SETFLOATFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2234 HOTSPOT_JNI_SETFLOATFIELD_RETURN())
2235 DEFINE_SETFIELD(jdouble, double, Double, 'D', d
2236 , HOTSPOT_JNI_SETDOUBLEFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2237 HOTSPOT_JNI_SETDOUBLEFIELD_RETURN())
2238
2239 DT_RETURN_MARK_DECL(ToReflectedField, jobject
2240 , HOTSPOT_JNI_TOREFLECTEDFIELD_RETURN(_ret_ref));
2241
2242 JNI_ENTRY(jobject, jni_ToReflectedField(JNIEnv *env, jclass cls, jfieldID fieldID, jboolean isStatic))
2243 JNIWrapper("ToReflectedField");
2244 HOTSPOT_JNI_TOREFLECTEDFIELD_ENTRY(env, cls, (uintptr_t) fieldID, isStatic);
2245 jobject ret = NULL;
2246 DT_RETURN_MARK(ToReflectedField, jobject, (const jobject&)ret);
2247
2248 fieldDescriptor fd;
2249 bool found = false;
2250 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2251
2252 assert(jfieldIDWorkaround::is_static_jfieldID(fieldID) == (isStatic != 0), "invalid fieldID");
2253
2254 if (isStatic) {
2255 // Static field. The fieldID a JNIid specifying the field holder and the offset within the Klass*.
2256 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID);
2257 assert(id->is_static_field_id(), "invalid static field id");
2258 found = id->find_local_field(&fd);
2259 } else {
2260 // Non-static field. The fieldID is really the offset of the field within the instanceOop.
2261 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID);
2262 found = InstanceKlass::cast(k)->find_field_from_offset(offset, false, &fd);
2263 }
2264 assert(found, "bad fieldID passed into jni_ToReflectedField");
2265 oop reflected = Reflection::new_field(&fd, CHECK_NULL);
2266 ret = JNIHandles::make_local(env, reflected);
2267 return ret;
2268 JNI_END
2269
2270
2271 //
2272 // Accessing Static Fields
2273 //
2274 DT_RETURN_MARK_DECL(GetStaticFieldID, jfieldID
2275 , HOTSPOT_JNI_GETSTATICFIELDID_RETURN((uintptr_t)_ret_ref));
2276
2277 JNI_ENTRY(jfieldID, jni_GetStaticFieldID(JNIEnv *env, jclass clazz,
2278 const char *name, const char *sig))
2279 JNIWrapper("GetStaticFieldID");
2280 HOTSPOT_JNI_GETSTATICFIELDID_ENTRY(env, clazz, (char *) name, (char *) sig);
2281 jfieldID ret = NULL;
2282 DT_RETURN_MARK(GetStaticFieldID, jfieldID, (const jfieldID&)ret);
2283
2284 // The class should have been loaded (we have an instance of the class
2285 // passed in) so the field and signature should already be in the symbol
2286 // table. If they're not there, the field doesn't exist.
2287 TempNewSymbol fieldname = SymbolTable::probe(name, (int)strlen(name));
2288 TempNewSymbol signame = SymbolTable::probe(sig, (int)strlen(sig));
2289 if (fieldname == NULL || signame == NULL) {
2290 THROW_MSG_0(vmSymbols::java_lang_NoSuchFieldError(), (char*) name);
2291 }
2292 KlassHandle k(THREAD,
2293 java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz)));
2294 // Make sure class is initialized before handing id's out to static fields
2295 k()->initialize(CHECK_NULL);
2296
2297 fieldDescriptor fd;
2298 if (!k()->oop_is_instance() ||
2299 !InstanceKlass::cast(k())->find_field(fieldname, signame, true, &fd)) {
2300 THROW_MSG_0(vmSymbols::java_lang_NoSuchFieldError(), (char*) name);
2301 }
2302
2303 // A jfieldID for a static field is a JNIid specifying the field holder and the offset within the Klass*
2304 JNIid* id = fd.field_holder()->jni_id_for(fd.offset());
2305 debug_only(id->set_is_static_field_id();)
2306
2307 debug_only(id->verify(fd.field_holder()));
2308
2309 ret = jfieldIDWorkaround::to_static_jfieldID(id);
2310 return ret;
2311 JNI_END
2312
2313
2314 JNI_ENTRY(jobject, jni_GetStaticObjectField(JNIEnv *env, jclass clazz, jfieldID fieldID))
2315 JNIWrapper("GetStaticObjectField");
2316 HOTSPOT_JNI_GETSTATICOBJECTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID);
2317 #if INCLUDE_JNI_CHECK
2318 DEBUG_ONLY(Klass* param_k = jniCheck::validate_class(thread, clazz);)
2319 #endif // INCLUDE_JNI_CHECK
2320 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID);
2321 assert(id->is_static_field_id(), "invalid static field id");
2322 // Keep JVMTI addition small and only check enabled flag here.
2323 // jni_GetField_probe() assumes that is okay to create handles.
2324 if (JvmtiExport::should_post_field_access()) {
2325 JvmtiExport::jni_GetField_probe(thread, NULL, NULL, id->holder(), fieldID, true);
2326 }
2327 jobject ret = JNIHandles::make_local(id->holder()->java_mirror()->obj_field(id->offset()));
2328 HOTSPOT_JNI_GETSTATICOBJECTFIELD_RETURN(ret);
2329 return ret;
2330 JNI_END
2331
2332
2333 #define DEFINE_GETSTATICFIELD(Return,Fieldname,Result \
2334 , EntryProbe, ReturnProbe) \
2335 \
2336 DT_RETURN_MARK_DECL_FOR(Result, GetStatic##Result##Field, Return \
2337 , ReturnProbe); \
2338 \
2339 JNI_ENTRY(Return, jni_GetStatic##Result##Field(JNIEnv *env, jclass clazz, jfieldID fieldID)) \
2340 JNIWrapper("GetStatic" XSTR(Result) "Field"); \
2341 EntryProbe; \
2342 Return ret = 0;\
2343 DT_RETURN_MARK_FOR(Result, GetStatic##Result##Field, Return, \
2344 (const Return&)ret);\
2345 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID); \
2346 assert(id->is_static_field_id(), "invalid static field id"); \
2347 /* Keep JVMTI addition small and only check enabled flag here. */ \
2348 /* jni_GetField_probe() assumes that is okay to create handles. */ \
2349 if (JvmtiExport::should_post_field_access()) { \
2350 JvmtiExport::jni_GetField_probe(thread, NULL, NULL, id->holder(), fieldID, true); \
2351 } \
2352 ret = id->holder()->java_mirror()-> Fieldname##_field (id->offset()); \
2353 return ret;\
2354 JNI_END
2355
2356 DEFINE_GETSTATICFIELD(jboolean, bool, Boolean
2357 , HOTSPOT_JNI_GETSTATICBOOLEANFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICBOOLEANFIELD_RETURN(_ret_ref))
2358 DEFINE_GETSTATICFIELD(jbyte, byte, Byte
2359 , HOTSPOT_JNI_GETSTATICBYTEFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICBYTEFIELD_RETURN(_ret_ref) )
2360 DEFINE_GETSTATICFIELD(jchar, char, Char
2361 , HOTSPOT_JNI_GETSTATICCHARFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICCHARFIELD_RETURN(_ret_ref) )
2362 DEFINE_GETSTATICFIELD(jshort, short, Short
2363 , HOTSPOT_JNI_GETSTATICSHORTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICSHORTFIELD_RETURN(_ret_ref) )
2364 DEFINE_GETSTATICFIELD(jint, int, Int
2365 , HOTSPOT_JNI_GETSTATICINTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICINTFIELD_RETURN(_ret_ref) )
2366 DEFINE_GETSTATICFIELD(jlong, long, Long
2367 , HOTSPOT_JNI_GETSTATICLONGFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICLONGFIELD_RETURN(_ret_ref) )
2368 // Float and double probes don't return value because dtrace doesn't currently support it
2369 DEFINE_GETSTATICFIELD(jfloat, float, Float
2370 , HOTSPOT_JNI_GETSTATICFLOATFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICFLOATFIELD_RETURN() )
2371 DEFINE_GETSTATICFIELD(jdouble, double, Double
2372 , HOTSPOT_JNI_GETSTATICDOUBLEFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICDOUBLEFIELD_RETURN() )
2373
2374 JNI_ENTRY(void, jni_SetStaticObjectField(JNIEnv *env, jclass clazz, jfieldID fieldID, jobject value))
2375 JNIWrapper("SetStaticObjectField");
2376 HOTSPOT_JNI_SETSTATICOBJECTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value);
2377 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID);
2378 assert(id->is_static_field_id(), "invalid static field id");
2379 // Keep JVMTI addition small and only check enabled flag here.
2380 // jni_SetField_probe() assumes that is okay to create handles.
2381 if (JvmtiExport::should_post_field_modification()) {
2382 jvalue field_value;
2383 field_value.l = value;
2384 JvmtiExport::jni_SetField_probe(thread, NULL, NULL, id->holder(), fieldID, true, 'L', (jvalue *)&field_value);
2385 }
2386 id->holder()->java_mirror()->obj_field_put(id->offset(), JNIHandles::resolve(value));
2387 HOTSPOT_JNI_SETSTATICOBJECTFIELD_RETURN();
2388 JNI_END
2389
2390
2391
2392 #define DEFINE_SETSTATICFIELD(Argument,Fieldname,Result,SigType,unionType \
2393 , EntryProbe, ReturnProbe) \
2394 \
2395 JNI_ENTRY(void, jni_SetStatic##Result##Field(JNIEnv *env, jclass clazz, jfieldID fieldID, Argument value)) \
2396 JNIWrapper("SetStatic" XSTR(Result) "Field"); \
2397 EntryProbe; \
2398 \
2399 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID); \
2400 assert(id->is_static_field_id(), "invalid static field id"); \
2401 /* Keep JVMTI addition small and only check enabled flag here. */ \
2402 /* jni_SetField_probe() assumes that is okay to create handles. */ \
2403 if (JvmtiExport::should_post_field_modification()) { \
2404 jvalue field_value; \
2405 field_value.unionType = value; \
2406 JvmtiExport::jni_SetField_probe(thread, NULL, NULL, id->holder(), fieldID, true, SigType, (jvalue *)&field_value); \
2407 } \
2408 id->holder()->java_mirror()-> Fieldname##_field_put (id->offset(), value); \
2409 ReturnProbe;\
2410 JNI_END
2411
2412 DEFINE_SETSTATICFIELD(jboolean, bool, Boolean, 'Z', z
2413 , HOTSPOT_JNI_SETSTATICBOOLEANFIELD_ENTRY(env, clazz, (uintptr_t)fieldID, value),
2414 HOTSPOT_JNI_SETSTATICBOOLEANFIELD_RETURN())
2415 DEFINE_SETSTATICFIELD(jbyte, byte, Byte, 'B', b
2416 , HOTSPOT_JNI_SETSTATICBYTEFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value),
2417 HOTSPOT_JNI_SETSTATICBYTEFIELD_RETURN())
2418 DEFINE_SETSTATICFIELD(jchar, char, Char, 'C', c
2419 , HOTSPOT_JNI_SETSTATICCHARFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value),
2420 HOTSPOT_JNI_SETSTATICCHARFIELD_RETURN())
2421 DEFINE_SETSTATICFIELD(jshort, short, Short, 'S', s
2422 , HOTSPOT_JNI_SETSTATICSHORTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value),
2423 HOTSPOT_JNI_SETSTATICSHORTFIELD_RETURN())
2424 DEFINE_SETSTATICFIELD(jint, int, Int, 'I', i
2425 , HOTSPOT_JNI_SETSTATICINTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value),
2426 HOTSPOT_JNI_SETSTATICINTFIELD_RETURN())
2427 DEFINE_SETSTATICFIELD(jlong, long, Long, 'J', j
2428 , HOTSPOT_JNI_SETSTATICLONGFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value),
2429 HOTSPOT_JNI_SETSTATICLONGFIELD_RETURN())
2430 // Float and double probes don't return value because dtrace doesn't currently support it
2431 DEFINE_SETSTATICFIELD(jfloat, float, Float, 'F', f
2432 , HOTSPOT_JNI_SETSTATICFLOATFIELD_ENTRY(env, clazz, (uintptr_t) fieldID),
2433 HOTSPOT_JNI_SETSTATICFLOATFIELD_RETURN())
2434 DEFINE_SETSTATICFIELD(jdouble, double, Double, 'D', d
2435 , HOTSPOT_JNI_SETSTATICDOUBLEFIELD_ENTRY(env, clazz, (uintptr_t) fieldID),
2436 HOTSPOT_JNI_SETSTATICDOUBLEFIELD_RETURN())
2437
2438 //
2439 // String Operations
2440 //
2441
2442 // Unicode Interface
2443
2444 DT_RETURN_MARK_DECL(NewString, jstring
2445 , HOTSPOT_JNI_NEWSTRING_RETURN(_ret_ref));
2446
2447 JNI_ENTRY(jstring, jni_NewString(JNIEnv *env, const jchar *unicodeChars, jsize len))
2448 JNIWrapper("NewString");
2449 HOTSPOT_JNI_NEWSTRING_ENTRY(env, (uint16_t *) unicodeChars, len);
2450 jstring ret = NULL;
2451 DT_RETURN_MARK(NewString, jstring, (const jstring&)ret);
2452 oop string=java_lang_String::create_oop_from_unicode((jchar*) unicodeChars, len, CHECK_NULL);
2453 ret = (jstring) JNIHandles::make_local(env, string);
2454 return ret;
2455 JNI_END
2456
2457
2458 JNI_QUICK_ENTRY(jsize, jni_GetStringLength(JNIEnv *env, jstring string))
2459 JNIWrapper("GetStringLength");
2460 HOTSPOT_JNI_GETSTRINGLENGTH_ENTRY(env, string);
2461 jsize ret = 0;
2462 oop s = JNIHandles::resolve_non_null(string);
2463 if (java_lang_String::value(s) != NULL) {
2464 ret = java_lang_String::length(s);
2465 }
2466 HOTSPOT_JNI_GETSTRINGLENGTH_RETURN(ret);
2467 return ret;
2468 JNI_END
2469
2470
2471 JNI_QUICK_ENTRY(const jchar*, jni_GetStringChars(
2472 JNIEnv *env, jstring string, jboolean *isCopy))
2473 JNIWrapper("GetStringChars");
2474 HOTSPOT_JNI_GETSTRINGCHARS_ENTRY(env, string, (uintptr_t *) isCopy);
2475 jchar* buf = NULL;
2476 oop s = JNIHandles::resolve_non_null(string);
2477 typeArrayOop s_value = java_lang_String::value(s);
2478 if (s_value != NULL) {
2479 int s_len = java_lang_String::length(s);
2480 int s_offset = java_lang_String::offset(s);
2481 buf = NEW_C_HEAP_ARRAY_RETURN_NULL(jchar, s_len + 1, mtInternal); // add one for zero termination
2482 /* JNI Specification states return NULL on OOM */
2483 if (buf != NULL) {
2484 if (s_len > 0) {
2485 memcpy(buf, s_value->char_at_addr(s_offset), sizeof(jchar)*s_len);
2486 }
2487 buf[s_len] = 0;
2488 //%note jni_5
2489 if (isCopy != NULL) {
2490 *isCopy = JNI_TRUE;
2491 }
2492 }
2493 }
2494 HOTSPOT_JNI_GETSTRINGCHARS_RETURN(buf);
2495 return buf;
2496 JNI_END
2497
2498
2499 JNI_QUICK_ENTRY(void, jni_ReleaseStringChars(JNIEnv *env, jstring str, const jchar *chars))
2500 JNIWrapper("ReleaseStringChars");
2501 HOTSPOT_JNI_RELEASESTRINGCHARS_ENTRY(env, str, (uint16_t *) chars);
2502 //%note jni_6
2503 if (chars != NULL) {
2504 // Since String objects are supposed to be immutable, don't copy any
2505 // new data back. A bad user will have to go after the char array.
2506 FreeHeap((void*) chars);
2507 }
2508 HOTSPOT_JNI_RELEASESTRINGCHARS_RETURN();
2509 JNI_END
2510
2511
2512 // UTF Interface
2513
2514 DT_RETURN_MARK_DECL(NewStringUTF, jstring
2515 , HOTSPOT_JNI_NEWSTRINGUTF_RETURN(_ret_ref));
2516
2517 JNI_ENTRY(jstring, jni_NewStringUTF(JNIEnv *env, const char *bytes))
2518 JNIWrapper("NewStringUTF");
2519 HOTSPOT_JNI_NEWSTRINGUTF_ENTRY(env, (char *) bytes);
2520 jstring ret;
2521 DT_RETURN_MARK(NewStringUTF, jstring, (const jstring&)ret);
2522
2523 oop result = java_lang_String::create_oop_from_str((char*) bytes, CHECK_NULL);
2524 ret = (jstring) JNIHandles::make_local(env, result);
2525 return ret;
2526 JNI_END
2527
2528
2529 JNI_ENTRY(jsize, jni_GetStringUTFLength(JNIEnv *env, jstring string))
2530 JNIWrapper("GetStringUTFLength");
2531 HOTSPOT_JNI_GETSTRINGUTFLENGTH_ENTRY(env, string);
2532 jsize ret = 0;
2533 oop java_string = JNIHandles::resolve_non_null(string);
2534 if (java_lang_String::value(java_string) != NULL) {
2535 ret = java_lang_String::utf8_length(java_string);
2536 }
2537 HOTSPOT_JNI_GETSTRINGUTFLENGTH_RETURN(ret);
2538 return ret;
2539 JNI_END
2540
2541
2542 JNI_ENTRY(const char*, jni_GetStringUTFChars(JNIEnv *env, jstring string, jboolean *isCopy))
2543 JNIWrapper("GetStringUTFChars");
2544 HOTSPOT_JNI_GETSTRINGUTFCHARS_ENTRY(env, string, (uintptr_t *) isCopy);
2545 char* result = NULL;
2546 oop java_string = JNIHandles::resolve_non_null(string);
2547 if (java_lang_String::value(java_string) != NULL) {
2548 size_t length = java_lang_String::utf8_length(java_string);
2549 /* JNI Specification states return NULL on OOM */
2550 result = AllocateHeap(length + 1, mtInternal, 0, AllocFailStrategy::RETURN_NULL);
2551 if (result != NULL) {
2552 java_lang_String::as_utf8_string(java_string, result, (int) length + 1);
2553 if (isCopy != NULL) {
2554 *isCopy = JNI_TRUE;
2555 }
2556 }
2557 }
2558 HOTSPOT_JNI_GETSTRINGUTFCHARS_RETURN(result);
2559 return result;
2560 JNI_END
2561
2562
2563 JNI_LEAF(void, jni_ReleaseStringUTFChars(JNIEnv *env, jstring str, const char *chars))
2564 JNIWrapper("ReleaseStringUTFChars");
2565 HOTSPOT_JNI_RELEASESTRINGUTFCHARS_ENTRY(env, str, (char *) chars);
2566 if (chars != NULL) {
2567 FreeHeap((char*) chars);
2568 }
2569 HOTSPOT_JNI_RELEASESTRINGUTFCHARS_RETURN();
2570 JNI_END
2571
2572
2573 JNI_QUICK_ENTRY(jsize, jni_GetArrayLength(JNIEnv *env, jarray array))
2574 JNIWrapper("GetArrayLength");
2575 HOTSPOT_JNI_GETARRAYLENGTH_ENTRY(env, array);
2576 arrayOop a = arrayOop(JNIHandles::resolve_non_null(array));
2577 assert(a->is_array(), "must be array");
2578 jsize ret = a->length();
2579 HOTSPOT_JNI_GETARRAYLENGTH_RETURN(ret);
2580 return ret;
2581 JNI_END
2582
2583
2584 //
2585 // Object Array Operations
2586 //
2587
2588 DT_RETURN_MARK_DECL(NewObjectArray, jobjectArray
2589 , HOTSPOT_JNI_NEWOBJECTARRAY_RETURN(_ret_ref));
2590
2591 JNI_ENTRY(jobjectArray, jni_NewObjectArray(JNIEnv *env, jsize length, jclass elementClass, jobject initialElement))
2592 JNIWrapper("NewObjectArray");
2593 HOTSPOT_JNI_NEWOBJECTARRAY_ENTRY(env, length, elementClass, initialElement);
2594 jobjectArray ret = NULL;
2595 DT_RETURN_MARK(NewObjectArray, jobjectArray, (const jobjectArray&)ret);
2596 KlassHandle ek(THREAD, java_lang_Class::as_Klass(JNIHandles::resolve_non_null(elementClass)));
2597 Klass* ako = ek()->array_klass(CHECK_NULL);
2598 KlassHandle ak = KlassHandle(THREAD, ako);
2599 ObjArrayKlass::cast(ak())->initialize(CHECK_NULL);
2600 objArrayOop result = ObjArrayKlass::cast(ak())->allocate(length, CHECK_NULL);
2601 oop initial_value = JNIHandles::resolve(initialElement);
2602 if (initial_value != NULL) { // array already initialized with NULL
2603 for (int index = 0; index < length; index++) {
2604 result->obj_at_put(index, initial_value);
2605 }
2606 }
2607 ret = (jobjectArray) JNIHandles::make_local(env, result);
2608 return ret;
2609 JNI_END
2610
2611 DT_RETURN_MARK_DECL(GetObjectArrayElement, jobject
2612 , HOTSPOT_JNI_GETOBJECTARRAYELEMENT_RETURN(_ret_ref));
2613
2614 JNI_ENTRY(jobject, jni_GetObjectArrayElement(JNIEnv *env, jobjectArray array, jsize index))
2615 JNIWrapper("GetObjectArrayElement");
2616 HOTSPOT_JNI_GETOBJECTARRAYELEMENT_ENTRY(env, array, index);
2617 jobject ret = NULL;
2618 DT_RETURN_MARK(GetObjectArrayElement, jobject, (const jobject&)ret);
2619 objArrayOop a = objArrayOop(JNIHandles::resolve_non_null(array));
2620 if (a->is_within_bounds(index)) {
2621 ret = JNIHandles::make_local(env, a->obj_at(index));
2622 return ret;
2623 } else {
2624 char buf[jintAsStringSize];
2625 sprintf(buf, "%d", index);
2626 THROW_MSG_0(vmSymbols::java_lang_ArrayIndexOutOfBoundsException(), buf);
2627 }
2628 JNI_END
2629
2630 DT_VOID_RETURN_MARK_DECL(SetObjectArrayElement
2631 , HOTSPOT_JNI_SETOBJECTARRAYELEMENT_RETURN());
2632
2633 JNI_ENTRY(void, jni_SetObjectArrayElement(JNIEnv *env, jobjectArray array, jsize index, jobject value))
2634 JNIWrapper("SetObjectArrayElement");
2635 HOTSPOT_JNI_SETOBJECTARRAYELEMENT_ENTRY(env, array, index, value);
2636 DT_VOID_RETURN_MARK(SetObjectArrayElement);
2637
2638 objArrayOop a = objArrayOop(JNIHandles::resolve_non_null(array));
2639 oop v = JNIHandles::resolve(value);
2640 if (a->is_within_bounds(index)) {
2641 if (v == NULL || v->is_a(ObjArrayKlass::cast(a->klass())->element_klass())) {
2642 a->obj_at_put(index, v);
2643 } else {
2644 THROW(vmSymbols::java_lang_ArrayStoreException());
2645 }
2646 } else {
2647 char buf[jintAsStringSize];
2648 sprintf(buf, "%d", index);
2649 THROW_MSG(vmSymbols::java_lang_ArrayIndexOutOfBoundsException(), buf);
2650 }
2651 JNI_END
2652
2653
2654
2655 #define DEFINE_NEWSCALARARRAY(Return,Allocator,Result \
2656 ,EntryProbe,ReturnProbe) \
2657 \
2658 DT_RETURN_MARK_DECL(New##Result##Array, Return \
2659 , ReturnProbe); \
2660 \
2661 JNI_ENTRY(Return, \
2662 jni_New##Result##Array(JNIEnv *env, jsize len)) \
2663 JNIWrapper("New" XSTR(Result) "Array"); \
2664 EntryProbe; \
2665 Return ret = NULL;\
2666 DT_RETURN_MARK(New##Result##Array, Return, (const Return&)ret);\
2667 \
2668 oop obj= oopFactory::Allocator(len, CHECK_0); \
2669 ret = (Return) JNIHandles::make_local(env, obj); \
2670 return ret;\
2671 JNI_END
2672
2673 DEFINE_NEWSCALARARRAY(jbooleanArray, new_boolArray, Boolean,
2674 HOTSPOT_JNI_NEWBOOLEANARRAY_ENTRY(env, len),
2675 HOTSPOT_JNI_NEWBOOLEANARRAY_RETURN(_ret_ref))
2676 DEFINE_NEWSCALARARRAY(jbyteArray, new_byteArray, Byte,
2677 HOTSPOT_JNI_NEWBYTEARRAY_ENTRY(env, len),
2678 HOTSPOT_JNI_NEWBYTEARRAY_RETURN(_ret_ref))
2679 DEFINE_NEWSCALARARRAY(jshortArray, new_shortArray, Short,
2680 HOTSPOT_JNI_NEWSHORTARRAY_ENTRY(env, len),
2681 HOTSPOT_JNI_NEWSHORTARRAY_RETURN(_ret_ref))
2682 DEFINE_NEWSCALARARRAY(jcharArray, new_charArray, Char,
2683 HOTSPOT_JNI_NEWCHARARRAY_ENTRY(env, len),
2684 HOTSPOT_JNI_NEWCHARARRAY_RETURN(_ret_ref))
2685 DEFINE_NEWSCALARARRAY(jintArray, new_intArray, Int,
2686 HOTSPOT_JNI_NEWINTARRAY_ENTRY(env, len),
2687 HOTSPOT_JNI_NEWINTARRAY_RETURN(_ret_ref))
2688 DEFINE_NEWSCALARARRAY(jlongArray, new_longArray, Long,
2689 HOTSPOT_JNI_NEWLONGARRAY_ENTRY(env, len),
2690 HOTSPOT_JNI_NEWLONGARRAY_RETURN(_ret_ref))
2691 DEFINE_NEWSCALARARRAY(jfloatArray, new_singleArray, Float,
2692 HOTSPOT_JNI_NEWFLOATARRAY_ENTRY(env, len),
2693 HOTSPOT_JNI_NEWFLOATARRAY_RETURN(_ret_ref))
2694 DEFINE_NEWSCALARARRAY(jdoubleArray, new_doubleArray, Double,
2695 HOTSPOT_JNI_NEWDOUBLEARRAY_ENTRY(env, len),
2696 HOTSPOT_JNI_NEWDOUBLEARRAY_RETURN(_ret_ref))
2697
2698 // Return an address which will fault if the caller writes to it.
2699
2700 static char* get_bad_address() {
2701 static char* bad_address = NULL;
2702 if (bad_address == NULL) {
2703 size_t size = os::vm_allocation_granularity();
2704 bad_address = os::reserve_memory(size);
2705 if (bad_address != NULL) {
2706 os::protect_memory(bad_address, size, os::MEM_PROT_READ,
2707 /*is_committed*/false);
2708 MemTracker::record_virtual_memory_type((void*)bad_address, mtInternal);
2709 }
2710 }
2711 return bad_address;
2712 }
2713
2714
2715
2716 #define DEFINE_GETSCALARARRAYELEMENTS(ElementTag,ElementType,Result, Tag \
2717 , EntryProbe, ReturnProbe) \
2718 \
2719 JNI_QUICK_ENTRY(ElementType*, \
2720 jni_Get##Result##ArrayElements(JNIEnv *env, ElementType##Array array, jboolean *isCopy)) \
2721 JNIWrapper("Get" XSTR(Result) "ArrayElements"); \
2722 EntryProbe; \
2723 /* allocate an chunk of memory in c land */ \
2724 typeArrayOop a = typeArrayOop(JNIHandles::resolve_non_null(array)); \
2725 ElementType* result; \
2726 int len = a->length(); \
2727 if (len == 0) { \
2728 /* Empty array: legal but useless, can't return NULL. \
2729 * Return a pointer to something useless. \
2730 * Avoid asserts in typeArrayOop. */ \
2731 result = (ElementType*)get_bad_address(); \
2732 } else { \
2733 /* JNI Specification states return NULL on OOM */ \
2734 result = NEW_C_HEAP_ARRAY_RETURN_NULL(ElementType, len, mtInternal); \
2735 if (result != NULL) { \
2736 /* copy the array to the c chunk */ \
2737 memcpy(result, a->Tag##_at_addr(0), sizeof(ElementType)*len); \
2738 if (isCopy) { \
2739 *isCopy = JNI_TRUE; \
2740 } \
2741 } \
2742 } \
2743 ReturnProbe; \
2744 return result; \
2745 JNI_END
2746
2747 DEFINE_GETSCALARARRAYELEMENTS(T_BOOLEAN, jboolean, Boolean, bool
2748 , HOTSPOT_JNI_GETBOOLEANARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy),
2749 HOTSPOT_JNI_GETBOOLEANARRAYELEMENTS_RETURN((uintptr_t*)result))
2750 DEFINE_GETSCALARARRAYELEMENTS(T_BYTE, jbyte, Byte, byte
2751 , HOTSPOT_JNI_GETBYTEARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy),
2752 HOTSPOT_JNI_GETBYTEARRAYELEMENTS_RETURN((char*)result))
2753 DEFINE_GETSCALARARRAYELEMENTS(T_SHORT, jshort, Short, short
2754 , HOTSPOT_JNI_GETSHORTARRAYELEMENTS_ENTRY(env, (uint16_t*) array, (uintptr_t *) isCopy),
2755 HOTSPOT_JNI_GETSHORTARRAYELEMENTS_RETURN((uint16_t*)result))
2756 DEFINE_GETSCALARARRAYELEMENTS(T_CHAR, jchar, Char, char
2757 , HOTSPOT_JNI_GETCHARARRAYELEMENTS_ENTRY(env, (uint16_t*) array, (uintptr_t *) isCopy),
2758 HOTSPOT_JNI_GETCHARARRAYELEMENTS_RETURN(result))
2759 DEFINE_GETSCALARARRAYELEMENTS(T_INT, jint, Int, int
2760 , HOTSPOT_JNI_GETINTARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy),
2761 HOTSPOT_JNI_GETINTARRAYELEMENTS_RETURN((uint32_t*)result))
2762 DEFINE_GETSCALARARRAYELEMENTS(T_LONG, jlong, Long, long
2763 , HOTSPOT_JNI_GETLONGARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy),
2764 HOTSPOT_JNI_GETLONGARRAYELEMENTS_RETURN(((uintptr_t*)result)))
2765 // Float and double probes don't return value because dtrace doesn't currently support it
2766 DEFINE_GETSCALARARRAYELEMENTS(T_FLOAT, jfloat, Float, float
2767 , HOTSPOT_JNI_GETFLOATARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy),
2768 HOTSPOT_JNI_GETFLOATARRAYELEMENTS_RETURN(result))
2769 DEFINE_GETSCALARARRAYELEMENTS(T_DOUBLE, jdouble, Double, double
2770 , HOTSPOT_JNI_GETDOUBLEARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy),
2771 HOTSPOT_JNI_GETDOUBLEARRAYELEMENTS_RETURN(result))
2772
2773
2774 #define DEFINE_RELEASESCALARARRAYELEMENTS(ElementTag,ElementType,Result,Tag \
2775 , EntryProbe, ReturnProbe);\
2776 \
2777 JNI_QUICK_ENTRY(void, \
2778 jni_Release##Result##ArrayElements(JNIEnv *env, ElementType##Array array, \
2779 ElementType *buf, jint mode)) \
2780 JNIWrapper("Release" XSTR(Result) "ArrayElements"); \
2781 EntryProbe; \
2782 typeArrayOop a = typeArrayOop(JNIHandles::resolve_non_null(array)); \
2783 int len = a->length(); \
2784 if (len != 0) { /* Empty array: nothing to free or copy. */ \
2785 if ((mode == 0) || (mode == JNI_COMMIT)) { \
2786 memcpy(a->Tag##_at_addr(0), buf, sizeof(ElementType)*len); \
2787 } \
2788 if ((mode == 0) || (mode == JNI_ABORT)) { \
2789 FreeHeap(buf); \
2790 } \
2791 } \
2792 ReturnProbe; \
2793 JNI_END
2794
2795 DEFINE_RELEASESCALARARRAYELEMENTS(T_BOOLEAN, jboolean, Boolean, bool
2796 , HOTSPOT_JNI_RELEASEBOOLEANARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) buf, mode),
2797 HOTSPOT_JNI_RELEASEBOOLEANARRAYELEMENTS_RETURN())
2798 DEFINE_RELEASESCALARARRAYELEMENTS(T_BYTE, jbyte, Byte, byte
2799 , HOTSPOT_JNI_RELEASEBYTEARRAYELEMENTS_ENTRY(env, array, (char *) buf, mode),
2800 HOTSPOT_JNI_RELEASEBYTEARRAYELEMENTS_RETURN())
2801 DEFINE_RELEASESCALARARRAYELEMENTS(T_SHORT, jshort, Short, short
2802 , HOTSPOT_JNI_RELEASESHORTARRAYELEMENTS_ENTRY(env, array, (uint16_t *) buf, mode),
2803 HOTSPOT_JNI_RELEASESHORTARRAYELEMENTS_RETURN())
2804 DEFINE_RELEASESCALARARRAYELEMENTS(T_CHAR, jchar, Char, char
2805 , HOTSPOT_JNI_RELEASECHARARRAYELEMENTS_ENTRY(env, array, (uint16_t *) buf, mode),
2806 HOTSPOT_JNI_RELEASECHARARRAYELEMENTS_RETURN())
2807 DEFINE_RELEASESCALARARRAYELEMENTS(T_INT, jint, Int, int
2808 , HOTSPOT_JNI_RELEASEINTARRAYELEMENTS_ENTRY(env, array, (uint32_t *) buf, mode),
2809 HOTSPOT_JNI_RELEASEINTARRAYELEMENTS_RETURN())
2810 DEFINE_RELEASESCALARARRAYELEMENTS(T_LONG, jlong, Long, long
2811 , HOTSPOT_JNI_RELEASELONGARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) buf, mode),
2812 HOTSPOT_JNI_RELEASELONGARRAYELEMENTS_RETURN())
2813 DEFINE_RELEASESCALARARRAYELEMENTS(T_FLOAT, jfloat, Float, float
2814 , HOTSPOT_JNI_RELEASEFLOATARRAYELEMENTS_ENTRY(env, array, (float *) buf, mode),
2815 HOTSPOT_JNI_RELEASEFLOATARRAYELEMENTS_RETURN())
2816 DEFINE_RELEASESCALARARRAYELEMENTS(T_DOUBLE, jdouble, Double, double
2817 , HOTSPOT_JNI_RELEASEDOUBLEARRAYELEMENTS_ENTRY(env, array, (double *) buf, mode),
2818 HOTSPOT_JNI_RELEASEDOUBLEARRAYELEMENTS_RETURN())
2819
2820
2821 #define DEFINE_GETSCALARARRAYREGION(ElementTag,ElementType,Result, Tag \
2822 , EntryProbe, ReturnProbe); \
2823 DT_VOID_RETURN_MARK_DECL(Get##Result##ArrayRegion \
2824 , ReturnProbe); \
2825 \
2826 JNI_ENTRY(void, \
2827 jni_Get##Result##ArrayRegion(JNIEnv *env, ElementType##Array array, jsize start, \
2828 jsize len, ElementType *buf)) \
2829 JNIWrapper("Get" XSTR(Result) "ArrayRegion"); \
2830 EntryProbe; \
2831 DT_VOID_RETURN_MARK(Get##Result##ArrayRegion); \
2832 typeArrayOop src = typeArrayOop(JNIHandles::resolve_non_null(array)); \
2833 if (start < 0 || len < 0 || ((unsigned int)start + (unsigned int)len > (unsigned int)src->length())) { \
2834 THROW(vmSymbols::java_lang_ArrayIndexOutOfBoundsException()); \
2835 } else { \
2836 if (len > 0) { \
2837 int sc = TypeArrayKlass::cast(src->klass())->log2_element_size(); \
2838 memcpy((u_char*) buf, \
2839 (u_char*) src->Tag##_at_addr(start), \
2840 len << sc); \
2841 } \
2842 } \
2843 JNI_END
2844
2845 DEFINE_GETSCALARARRAYREGION(T_BOOLEAN, jboolean,Boolean, bool
2846 , HOTSPOT_JNI_GETBOOLEANARRAYREGION_ENTRY(env, array, start, len, (uintptr_t *) buf),
2847 HOTSPOT_JNI_GETBOOLEANARRAYREGION_RETURN());
2848 DEFINE_GETSCALARARRAYREGION(T_BYTE, jbyte, Byte, byte
2849 , HOTSPOT_JNI_GETBYTEARRAYREGION_ENTRY(env, array, start, len, (char *) buf),
2850 HOTSPOT_JNI_GETBYTEARRAYREGION_RETURN());
2851 DEFINE_GETSCALARARRAYREGION(T_SHORT, jshort, Short, short
2852 , HOTSPOT_JNI_GETSHORTARRAYREGION_ENTRY(env, array, start, len, (uint16_t *) buf),
2853 HOTSPOT_JNI_GETSHORTARRAYREGION_RETURN());
2854 DEFINE_GETSCALARARRAYREGION(T_CHAR, jchar, Char, char
2855 , HOTSPOT_JNI_GETCHARARRAYREGION_ENTRY(env, array, start, len, (uint16_t*) buf),
2856 HOTSPOT_JNI_GETCHARARRAYREGION_RETURN());
2857 DEFINE_GETSCALARARRAYREGION(T_INT, jint, Int, int
2858 , HOTSPOT_JNI_GETINTARRAYREGION_ENTRY(env, array, start, len, (uint32_t*) buf),
2859 HOTSPOT_JNI_GETINTARRAYREGION_RETURN());
2860 DEFINE_GETSCALARARRAYREGION(T_LONG, jlong, Long, long
2861 , HOTSPOT_JNI_GETLONGARRAYREGION_ENTRY(env, array, start, len, (uintptr_t *) buf),
2862 HOTSPOT_JNI_GETLONGARRAYREGION_RETURN());
2863 DEFINE_GETSCALARARRAYREGION(T_FLOAT, jfloat, Float, float
2864 , HOTSPOT_JNI_GETFLOATARRAYREGION_ENTRY(env, array, start, len, (float *) buf),
2865 HOTSPOT_JNI_GETFLOATARRAYREGION_RETURN());
2866 DEFINE_GETSCALARARRAYREGION(T_DOUBLE, jdouble, Double, double
2867 , HOTSPOT_JNI_GETDOUBLEARRAYREGION_ENTRY(env, array, start, len, (double *) buf),
2868 HOTSPOT_JNI_GETDOUBLEARRAYREGION_RETURN());
2869
2870
2871 #define DEFINE_SETSCALARARRAYREGION(ElementTag,ElementType,Result, Tag \
2872 , EntryProbe, ReturnProbe); \
2873 DT_VOID_RETURN_MARK_DECL(Set##Result##ArrayRegion \
2874 ,ReturnProbe); \
2875 \
2876 JNI_ENTRY(void, \
2877 jni_Set##Result##ArrayRegion(JNIEnv *env, ElementType##Array array, jsize start, \
2878 jsize len, const ElementType *buf)) \
2879 JNIWrapper("Set" XSTR(Result) "ArrayRegion"); \
2880 EntryProbe; \
2881 DT_VOID_RETURN_MARK(Set##Result##ArrayRegion); \
2882 typeArrayOop dst = typeArrayOop(JNIHandles::resolve_non_null(array)); \
2883 if (start < 0 || len < 0 || ((unsigned int)start + (unsigned int)len > (unsigned int)dst->length())) { \
2884 THROW(vmSymbols::java_lang_ArrayIndexOutOfBoundsException()); \
2885 } else { \
2886 if (len > 0) { \
2887 int sc = TypeArrayKlass::cast(dst->klass())->log2_element_size(); \
2888 memcpy((u_char*) dst->Tag##_at_addr(start), \
2889 (u_char*) buf, \
2890 len << sc); \
2891 } \
2892 } \
2893 JNI_END
2894
2895 DEFINE_SETSCALARARRAYREGION(T_BOOLEAN, jboolean, Boolean, bool
2896 , HOTSPOT_JNI_SETBOOLEANARRAYREGION_ENTRY(env, array, start, len, (uintptr_t *)buf),
2897 HOTSPOT_JNI_SETBOOLEANARRAYREGION_RETURN())
2898 DEFINE_SETSCALARARRAYREGION(T_BYTE, jbyte, Byte, byte
2899 , HOTSPOT_JNI_SETBYTEARRAYREGION_ENTRY(env, array, start, len, (char *) buf),
2900 HOTSPOT_JNI_SETBYTEARRAYREGION_RETURN())
2901 DEFINE_SETSCALARARRAYREGION(T_SHORT, jshort, Short, short
2902 , HOTSPOT_JNI_SETSHORTARRAYREGION_ENTRY(env, array, start, len, (uint16_t *) buf),
2903 HOTSPOT_JNI_SETSHORTARRAYREGION_RETURN())
2904 DEFINE_SETSCALARARRAYREGION(T_CHAR, jchar, Char, char
2905 , HOTSPOT_JNI_SETCHARARRAYREGION_ENTRY(env, array, start, len, (uint16_t *) buf),
2906 HOTSPOT_JNI_SETCHARARRAYREGION_RETURN())
2907 DEFINE_SETSCALARARRAYREGION(T_INT, jint, Int, int
2908 , HOTSPOT_JNI_SETINTARRAYREGION_ENTRY(env, array, start, len, (uint32_t *) buf),
2909 HOTSPOT_JNI_SETINTARRAYREGION_RETURN())
2910 DEFINE_SETSCALARARRAYREGION(T_LONG, jlong, Long, long
2911 , HOTSPOT_JNI_SETLONGARRAYREGION_ENTRY(env, array, start, len, (uintptr_t *) buf),
2912 HOTSPOT_JNI_SETLONGARRAYREGION_RETURN())
2913 DEFINE_SETSCALARARRAYREGION(T_FLOAT, jfloat, Float, float
2914 , HOTSPOT_JNI_SETFLOATARRAYREGION_ENTRY(env, array, start, len, (float *) buf),
2915 HOTSPOT_JNI_SETFLOATARRAYREGION_RETURN())
2916 DEFINE_SETSCALARARRAYREGION(T_DOUBLE, jdouble, Double, double
2917 , HOTSPOT_JNI_SETDOUBLEARRAYREGION_ENTRY(env, array, start, len, (double *) buf),
2918 HOTSPOT_JNI_SETDOUBLEARRAYREGION_RETURN())
2919
2920
2921 //
2922 // Interception of natives
2923 //
2924
2925 // The RegisterNatives call being attempted tried to register with a method that
2926 // is not native. Ask JVM TI what prefixes have been specified. Then check
2927 // to see if the native method is now wrapped with the prefixes. See the
2928 // SetNativeMethodPrefix(es) functions in the JVM TI Spec for details.
2929 static Method* find_prefixed_native(KlassHandle k,
2930 Symbol* name, Symbol* signature, TRAPS) {
2931 #if INCLUDE_JVMTI
2932 ResourceMark rm(THREAD);
2933 Method* method;
2934 int name_len = name->utf8_length();
2935 char* name_str = name->as_utf8();
2936 int prefix_count;
2937 char** prefixes = JvmtiExport::get_all_native_method_prefixes(&prefix_count);
2938 for (int i = 0; i < prefix_count; i++) {
2939 char* prefix = prefixes[i];
2940 int prefix_len = (int)strlen(prefix);
2941
2942 // try adding this prefix to the method name and see if it matches another method name
2943 int trial_len = name_len + prefix_len;
2944 char* trial_name_str = NEW_RESOURCE_ARRAY(char, trial_len + 1);
2945 strcpy(trial_name_str, prefix);
2946 strcat(trial_name_str, name_str);
2947 TempNewSymbol trial_name = SymbolTable::probe(trial_name_str, trial_len);
2948 if (trial_name == NULL) {
2949 continue; // no such symbol, so this prefix wasn't used, try the next prefix
2950 }
2951 method = k()->lookup_method(trial_name, signature);
2952 if (method == NULL) {
2953 continue; // signature doesn't match, try the next prefix
2954 }
2955 if (method->is_native()) {
2956 method->set_is_prefixed_native();
2957 return method; // wahoo, we found a prefixed version of the method, return it
2958 }
2959 // found as non-native, so prefix is good, add it, probably just need more prefixes
2960 name_len = trial_len;
2961 name_str = trial_name_str;
2962 }
2963 #endif // INCLUDE_JVMTI
2964 return NULL; // not found
2965 }
2966
2967 static bool register_native(KlassHandle k, Symbol* name, Symbol* signature, address entry, TRAPS) {
2968 Method* method = k()->lookup_method(name, signature);
2969 if (method == NULL) {
2970 ResourceMark rm;
2971 stringStream st;
2972 st.print("Method %s name or signature does not match",
2973 Method::name_and_sig_as_C_string(k(), name, signature));
2974 THROW_MSG_(vmSymbols::java_lang_NoSuchMethodError(), st.as_string(), false);
2975 }
2976 if (!method->is_native()) {
2977 // trying to register to a non-native method, see if a JVM TI agent has added prefix(es)
2978 method = find_prefixed_native(k, name, signature, THREAD);
2979 if (method == NULL) {
2980 ResourceMark rm;
2981 stringStream st;
2982 st.print("Method %s is not declared as native",
2983 Method::name_and_sig_as_C_string(k(), name, signature));
2984 THROW_MSG_(vmSymbols::java_lang_NoSuchMethodError(), st.as_string(), false);
2985 }
2986 }
2987
2988 if (entry != NULL) {
2989 method->set_native_function(entry,
2990 Method::native_bind_event_is_interesting);
2991 } else {
2992 method->clear_native_function();
2993 }
2994 if (PrintJNIResolving) {
2995 ResourceMark rm(THREAD);
2996 tty->print_cr("[Registering JNI native method %s.%s]",
2997 method->method_holder()->external_name(),
2998 method->name()->as_C_string());
2999 }
3000 return true;
3001 }
3002
3003 DT_RETURN_MARK_DECL(RegisterNatives, jint
3004 , HOTSPOT_JNI_REGISTERNATIVES_RETURN(_ret_ref));
3005
3006 JNI_ENTRY(jint, jni_RegisterNatives(JNIEnv *env, jclass clazz,
3007 const JNINativeMethod *methods,
3008 jint nMethods))
3009 JNIWrapper("RegisterNatives");
3010 HOTSPOT_JNI_REGISTERNATIVES_ENTRY(env, clazz, (void *) methods, nMethods);
3011 jint ret = 0;
3012 DT_RETURN_MARK(RegisterNatives, jint, (const jint&)ret);
3013
3014 KlassHandle h_k(thread, java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz)));
3015
3016 for (int index = 0; index < nMethods; index++) {
3017 const char* meth_name = methods[index].name;
3018 const char* meth_sig = methods[index].signature;
3019 int meth_name_len = (int)strlen(meth_name);
3020
3021 // The class should have been loaded (we have an instance of the class
3022 // passed in) so the method and signature should already be in the symbol
3023 // table. If they're not there, the method doesn't exist.
3024 TempNewSymbol name = SymbolTable::probe(meth_name, meth_name_len);
3025 TempNewSymbol signature = SymbolTable::probe(meth_sig, (int)strlen(meth_sig));
3026
3027 if (name == NULL || signature == NULL) {
3028 ResourceMark rm;
3029 stringStream st;
3030 st.print("Method %s.%s%s not found", h_k()->external_name(), meth_name, meth_sig);
3031 // Must return negative value on failure
3032 THROW_MSG_(vmSymbols::java_lang_NoSuchMethodError(), st.as_string(), -1);
3033 }
3034
3035 bool res = register_native(h_k, name, signature,
3036 (address) methods[index].fnPtr, THREAD);
3037 if (!res) {
3038 ret = -1;
3039 break;
3040 }
3041 }
3042 return ret;
3043 JNI_END
3044
3045
3046 JNI_ENTRY(jint, jni_UnregisterNatives(JNIEnv *env, jclass clazz))
3047 JNIWrapper("UnregisterNatives");
3048 HOTSPOT_JNI_UNREGISTERNATIVES_ENTRY(env, clazz);
3049 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz));
3050 //%note jni_2
3051 if (k->oop_is_instance()) {
3052 for (int index = 0; index < InstanceKlass::cast(k)->methods()->length(); index++) {
3053 Method* m = InstanceKlass::cast(k)->methods()->at(index);
3054 if (m->is_native()) {
3055 m->clear_native_function();
3056 m->set_signature_handler(NULL);
3057 }
3058 }
3059 }
3060 HOTSPOT_JNI_UNREGISTERNATIVES_RETURN(0);
3061 return 0;
3062 JNI_END
3063
3064 //
3065 // Monitor functions
3066 //
3067
3068 DT_RETURN_MARK_DECL(MonitorEnter, jint
3069 , HOTSPOT_JNI_MONITORENTER_RETURN(_ret_ref));
3070
3071 JNI_ENTRY(jint, jni_MonitorEnter(JNIEnv *env, jobject jobj))
3072 HOTSPOT_JNI_MONITORENTER_ENTRY(env, jobj);
3073 jint ret = JNI_ERR;
3074 DT_RETURN_MARK(MonitorEnter, jint, (const jint&)ret);
3075
3076 // If the object is null, we can't do anything with it
3077 if (jobj == NULL) {
3078 THROW_(vmSymbols::java_lang_NullPointerException(), JNI_ERR);
3079 }
3080
3081 Handle obj(thread, JNIHandles::resolve_non_null(jobj));
3082 ObjectSynchronizer::jni_enter(obj, CHECK_(JNI_ERR));
3083 ret = JNI_OK;
3084 return ret;
3085 JNI_END
3086
3087 DT_RETURN_MARK_DECL(MonitorExit, jint
3088 , HOTSPOT_JNI_MONITOREXIT_RETURN(_ret_ref));
3089
3090 JNI_ENTRY(jint, jni_MonitorExit(JNIEnv *env, jobject jobj))
3091 HOTSPOT_JNI_MONITOREXIT_ENTRY(env, jobj);
3092 jint ret = JNI_ERR;
3093 DT_RETURN_MARK(MonitorExit, jint, (const jint&)ret);
3094
3095 // Don't do anything with a null object
3096 if (jobj == NULL) {
3097 THROW_(vmSymbols::java_lang_NullPointerException(), JNI_ERR);
3098 }
3099
3100 Handle obj(THREAD, JNIHandles::resolve_non_null(jobj));
3101 ObjectSynchronizer::jni_exit(obj(), CHECK_(JNI_ERR));
3102
3103 ret = JNI_OK;
3104 return ret;
3105 JNI_END
3106
3107 //
3108 // Extensions
3109 //
3110
3111 DT_VOID_RETURN_MARK_DECL(GetStringRegion
3112 , HOTSPOT_JNI_GETSTRINGREGION_RETURN());
3113
3114 JNI_ENTRY(void, jni_GetStringRegion(JNIEnv *env, jstring string, jsize start, jsize len, jchar *buf))
3115 JNIWrapper("GetStringRegion");
3116 HOTSPOT_JNI_GETSTRINGREGION_ENTRY(env, string, start, len, buf);
3117 DT_VOID_RETURN_MARK(GetStringRegion);
3118 oop s = JNIHandles::resolve_non_null(string);
3119 int s_len = java_lang_String::length(s);
3120 if (start < 0 || len < 0 || start + len > s_len) {
3121 THROW(vmSymbols::java_lang_StringIndexOutOfBoundsException());
3122 } else {
3123 if (len > 0) {
3124 int s_offset = java_lang_String::offset(s);
3125 typeArrayOop s_value = java_lang_String::value(s);
3126 memcpy(buf, s_value->char_at_addr(s_offset+start), sizeof(jchar)*len);
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 GC_locker::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 GC_locker::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 GC_locker::lock_critical(thread);
3192 if (isCopy != NULL) {
3193 *isCopy = JNI_FALSE;
3194 }
3195 oop s = JNIHandles::resolve_non_null(string);
3196 int s_len = java_lang_String::length(s);
3197 typeArrayOop s_value = java_lang_String::value(s);
3198 int s_offset = java_lang_String::offset(s);
3199 const jchar* ret;
3200 if (s_len > 0) {
3201 ret = s_value->char_at_addr(s_offset);
3202 } else {
3203 ret = (jchar*) s_value->base(T_CHAR);
3204 }
3205 HOTSPOT_JNI_GETSTRINGCRITICAL_RETURN((uint16_t *) ret);
3206 return ret;
3207 JNI_END
3208
3209
3210 JNI_ENTRY(void, jni_ReleaseStringCritical(JNIEnv *env, jstring str, const jchar *chars))
3211 JNIWrapper("ReleaseStringCritical");
3212 HOTSPOT_JNI_RELEASESTRINGCRITICAL_ENTRY(env, str, (uint16_t *) chars);
3213 // The str and chars arguments are ignored
3214 GC_locker::unlock_critical(thread);
3215 HOTSPOT_JNI_RELEASESTRINGCRITICAL_RETURN();
3216 JNI_END
3217
3218
3219 JNI_ENTRY(jweak, jni_NewWeakGlobalRef(JNIEnv *env, jobject ref))
3220 JNIWrapper("jni_NewWeakGlobalRef");
3221 HOTSPOT_JNI_NEWWEAKGLOBALREF_ENTRY(env, ref);
3222 Handle ref_handle(thread, JNIHandles::resolve(ref));
3223 jweak ret = JNIHandles::make_weak_global(ref_handle);
3224 HOTSPOT_JNI_NEWWEAKGLOBALREF_RETURN(ret);
3225 return ret;
3226 JNI_END
3227
3228 // Must be JNI_ENTRY (with HandleMark)
3229 JNI_ENTRY(void, jni_DeleteWeakGlobalRef(JNIEnv *env, jweak ref))
3230 JNIWrapper("jni_DeleteWeakGlobalRef");
3231 HOTSPOT_JNI_DELETEWEAKGLOBALREF_ENTRY(env, ref);
3232 JNIHandles::destroy_weak_global(ref);
3233 HOTSPOT_JNI_DELETEWEAKGLOBALREF_RETURN();
3234 JNI_END
3235
3236
3237 JNI_QUICK_ENTRY(jboolean, jni_ExceptionCheck(JNIEnv *env))
3238 JNIWrapper("jni_ExceptionCheck");
3239 HOTSPOT_JNI_EXCEPTIONCHECK_ENTRY(env);
3240 jni_check_async_exceptions(thread);
3241 jboolean ret = (thread->has_pending_exception()) ? JNI_TRUE : JNI_FALSE;
3242 HOTSPOT_JNI_EXCEPTIONCHECK_RETURN(ret);
3243 return ret;
3244 JNI_END
3245
3246
3247 // Initialization state for three routines below relating to
3248 // java.nio.DirectBuffers
3249 static jint directBufferSupportInitializeStarted = 0;
3250 static volatile jint directBufferSupportInitializeEnded = 0;
3251 static volatile jint directBufferSupportInitializeFailed = 0;
3252 static jclass bufferClass = NULL;
3253 static jclass directBufferClass = NULL;
3254 static jclass directByteBufferClass = NULL;
3255 static jmethodID directByteBufferConstructor = NULL;
3256 static jfieldID directBufferAddressField = NULL;
3257 static jfieldID bufferCapacityField = NULL;
3258
3259 static jclass lookupOne(JNIEnv* env, const char* name, TRAPS) {
3260 Handle loader; // null (bootstrap) loader
3261 Handle protection_domain; // null protection domain
3262
3263 TempNewSymbol sym = SymbolTable::new_symbol(name, CHECK_NULL);
3264 jclass result = find_class_from_class_loader(env, sym, true, loader, protection_domain, true, CHECK_NULL);
3265
3266 if (TraceClassResolution && result != NULL) {
3267 trace_class_resolution(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(result)));
3268 }
3269 return result;
3270 }
3271
3272 // These lookups are done with the NULL (bootstrap) ClassLoader to
3273 // circumvent any security checks that would be done by jni_FindClass.
3274 JNI_ENTRY(bool, lookupDirectBufferClasses(JNIEnv* env))
3275 {
3276 if ((bufferClass = lookupOne(env, "java/nio/Buffer", thread)) == NULL) { return false; }
3277 if ((directBufferClass = lookupOne(env, "sun/nio/ch/DirectBuffer", thread)) == NULL) { return false; }
3278 if ((directByteBufferClass = lookupOne(env, "java/nio/DirectByteBuffer", thread)) == NULL) { return false; }
3279 return true;
3280 }
3281 JNI_END
3282
3283
3284 static bool initializeDirectBufferSupport(JNIEnv* env, JavaThread* thread) {
3285 if (directBufferSupportInitializeFailed) {
3286 return false;
3287 }
3288
3289 if (Atomic::cmpxchg(1, &directBufferSupportInitializeStarted, 0) == 0) {
3290 if (!lookupDirectBufferClasses(env)) {
3291 directBufferSupportInitializeFailed = 1;
3292 return false;
3293 }
3294
3295 // Make global references for these
3296 bufferClass = (jclass) env->NewGlobalRef(bufferClass);
3297 directBufferClass = (jclass) env->NewGlobalRef(directBufferClass);
3298 directByteBufferClass = (jclass) env->NewGlobalRef(directByteBufferClass);
3299
3300 // Get needed field and method IDs
3301 directByteBufferConstructor = env->GetMethodID(directByteBufferClass, "<init>", "(JI)V");
3302 if (env->ExceptionCheck()) {
3303 env->ExceptionClear();
3304 directBufferSupportInitializeFailed = 1;
3305 return false;
3306 }
3307 directBufferAddressField = env->GetFieldID(bufferClass, "address", "J");
3308 if (env->ExceptionCheck()) {
3309 env->ExceptionClear();
3310 directBufferSupportInitializeFailed = 1;
3311 return false;
3312 }
3313 bufferCapacityField = env->GetFieldID(bufferClass, "capacity", "I");
3314 if (env->ExceptionCheck()) {
3315 env->ExceptionClear();
3316 directBufferSupportInitializeFailed = 1;
3317 return false;
3318 }
3319
3320 if ((directByteBufferConstructor == NULL) ||
3321 (directBufferAddressField == NULL) ||
3322 (bufferCapacityField == NULL)) {
3323 directBufferSupportInitializeFailed = 1;
3324 return false;
3325 }
3326
3327 directBufferSupportInitializeEnded = 1;
3328 } else {
3329 while (!directBufferSupportInitializeEnded && !directBufferSupportInitializeFailed) {
3330 os::naked_yield();
3331 }
3332 }
3333
3334 return !directBufferSupportInitializeFailed;
3335 }
3336
3337 extern "C" jobject JNICALL jni_NewDirectByteBuffer(JNIEnv *env, void* address, jlong capacity)
3338 {
3339 // thread_from_jni_environment() will block if VM is gone.
3340 JavaThread* thread = JavaThread::thread_from_jni_environment(env);
3341
3342 JNIWrapper("jni_NewDirectByteBuffer");
3343 HOTSPOT_JNI_NEWDIRECTBYTEBUFFER_ENTRY(env, address, capacity);
3344
3345 if (!directBufferSupportInitializeEnded) {
3346 if (!initializeDirectBufferSupport(env, thread)) {
3347 HOTSPOT_JNI_NEWDIRECTBYTEBUFFER_RETURN(NULL);
3348 return NULL;
3349 }
3350 }
3351
3352 // Being paranoid about accidental sign extension on address
3353 jlong addr = (jlong) ((uintptr_t) address);
3354 // NOTE that package-private DirectByteBuffer constructor currently
3355 // takes int capacity
3356 jint cap = (jint) capacity;
3357 jobject ret = env->NewObject(directByteBufferClass, directByteBufferConstructor, addr, cap);
3358 HOTSPOT_JNI_NEWDIRECTBYTEBUFFER_RETURN(ret);
3359 return ret;
3360 }
3361
3362 DT_RETURN_MARK_DECL(GetDirectBufferAddress, void*
3363 , HOTSPOT_JNI_GETDIRECTBUFFERADDRESS_RETURN((void*) _ret_ref));
3364
3365 extern "C" void* JNICALL jni_GetDirectBufferAddress(JNIEnv *env, jobject buf)
3366 {
3367 // thread_from_jni_environment() will block if VM is gone.
3368 JavaThread* thread = JavaThread::thread_from_jni_environment(env);
3369
3370 JNIWrapper("jni_GetDirectBufferAddress");
3371 HOTSPOT_JNI_GETDIRECTBUFFERADDRESS_ENTRY(env, buf);
3372 void* ret = NULL;
3373 DT_RETURN_MARK(GetDirectBufferAddress, void*, (const void*&)ret);
3374
3375 if (!directBufferSupportInitializeEnded) {
3376 if (!initializeDirectBufferSupport(env, thread)) {
3377 return 0;
3378 }
3379 }
3380
3381 if ((buf != NULL) && (!env->IsInstanceOf(buf, directBufferClass))) {
3382 return 0;
3383 }
3384
3385 ret = (void*)(intptr_t)env->GetLongField(buf, directBufferAddressField);
3386 return ret;
3387 }
3388
3389 DT_RETURN_MARK_DECL(GetDirectBufferCapacity, jlong
3390 , HOTSPOT_JNI_GETDIRECTBUFFERCAPACITY_RETURN(_ret_ref));
3391
3392 extern "C" jlong JNICALL jni_GetDirectBufferCapacity(JNIEnv *env, jobject buf)
3393 {
3394 // thread_from_jni_environment() will block if VM is gone.
3395 JavaThread* thread = JavaThread::thread_from_jni_environment(env);
3396
3397 JNIWrapper("jni_GetDirectBufferCapacity");
3398 HOTSPOT_JNI_GETDIRECTBUFFERCAPACITY_ENTRY(env, buf);
3399 jlong ret = -1;
3400 DT_RETURN_MARK(GetDirectBufferCapacity, jlong, (const jlong&)ret);
3401
3402 if (!directBufferSupportInitializeEnded) {
3403 if (!initializeDirectBufferSupport(env, thread)) {
3404 ret = 0;
3405 return ret;
3406 }
3407 }
3408
3409 if (buf == NULL) {
3410 return -1;
3411 }
3412
3413 if (!env->IsInstanceOf(buf, directBufferClass)) {
3414 return -1;
3415 }
3416
3417 // NOTE that capacity is currently an int in the implementation
3418 ret = env->GetIntField(buf, bufferCapacityField);
3419 return ret;
3420 }
3421
3422
3423 JNI_LEAF(jint, jni_GetVersion(JNIEnv *env))
3424 JNIWrapper("GetVersion");
3425 HOTSPOT_JNI_GETVERSION_ENTRY(env);
3426 HOTSPOT_JNI_GETVERSION_RETURN(CurrentVersion);
3427 return CurrentVersion;
3428 JNI_END
3429
3430 extern struct JavaVM_ main_vm;
3431
3432 JNI_LEAF(jint, jni_GetJavaVM(JNIEnv *env, JavaVM **vm))
3433 JNIWrapper("jni_GetJavaVM");
3434 HOTSPOT_JNI_GETJAVAVM_ENTRY(env, (void **) vm);
3435 *vm = (JavaVM *)(&main_vm);
3436 HOTSPOT_JNI_GETJAVAVM_RETURN(JNI_OK);
3437 return JNI_OK;
3438 JNI_END
3439
3440 // Structure containing all jni functions
3441 struct JNINativeInterface_ jni_NativeInterface = {
3442 NULL,
3443 NULL,
3444 NULL,
3445
3446 NULL,
3447
3448 jni_GetVersion,
3449
3450 jni_DefineClass,
3451 jni_FindClass,
3452
3453 jni_FromReflectedMethod,
3454 jni_FromReflectedField,
3455
3456 jni_ToReflectedMethod,
3457
3458 jni_GetSuperclass,
3459 jni_IsAssignableFrom,
3460
3461 jni_ToReflectedField,
3462
3463 jni_Throw,
3464 jni_ThrowNew,
3465 jni_ExceptionOccurred,
3466 jni_ExceptionDescribe,
3467 jni_ExceptionClear,
3468 jni_FatalError,
3469
3470 jni_PushLocalFrame,
3471 jni_PopLocalFrame,
3472
3473 jni_NewGlobalRef,
3474 jni_DeleteGlobalRef,
3475 jni_DeleteLocalRef,
3476 jni_IsSameObject,
3477
3478 jni_NewLocalRef,
3479 jni_EnsureLocalCapacity,
3480
3481 jni_AllocObject,
3482 jni_NewObject,
3483 jni_NewObjectV,
3484 jni_NewObjectA,
3485
3486 jni_GetObjectClass,
3487 jni_IsInstanceOf,
3488
3489 jni_GetMethodID,
3490
3491 jni_CallObjectMethod,
3492 jni_CallObjectMethodV,
3493 jni_CallObjectMethodA,
3494 jni_CallBooleanMethod,
3495 jni_CallBooleanMethodV,
3496 jni_CallBooleanMethodA,
3497 jni_CallByteMethod,
3498 jni_CallByteMethodV,
3499 jni_CallByteMethodA,
3500 jni_CallCharMethod,
3501 jni_CallCharMethodV,
3502 jni_CallCharMethodA,
3503 jni_CallShortMethod,
3504 jni_CallShortMethodV,
3505 jni_CallShortMethodA,
3506 jni_CallIntMethod,
3507 jni_CallIntMethodV,
3508 jni_CallIntMethodA,
3509 jni_CallLongMethod,
3510 jni_CallLongMethodV,
3511 jni_CallLongMethodA,
3512 jni_CallFloatMethod,
3513 jni_CallFloatMethodV,
3514 jni_CallFloatMethodA,
3515 jni_CallDoubleMethod,
3516 jni_CallDoubleMethodV,
3517 jni_CallDoubleMethodA,
3518 jni_CallVoidMethod,
3519 jni_CallVoidMethodV,
3520 jni_CallVoidMethodA,
3521
3522 jni_CallNonvirtualObjectMethod,
3523 jni_CallNonvirtualObjectMethodV,
3524 jni_CallNonvirtualObjectMethodA,
3525 jni_CallNonvirtualBooleanMethod,
3526 jni_CallNonvirtualBooleanMethodV,
3527 jni_CallNonvirtualBooleanMethodA,
3528 jni_CallNonvirtualByteMethod,
3529 jni_CallNonvirtualByteMethodV,
3530 jni_CallNonvirtualByteMethodA,
3531 jni_CallNonvirtualCharMethod,
3532 jni_CallNonvirtualCharMethodV,
3533 jni_CallNonvirtualCharMethodA,
3534 jni_CallNonvirtualShortMethod,
3535 jni_CallNonvirtualShortMethodV,
3536 jni_CallNonvirtualShortMethodA,
3537 jni_CallNonvirtualIntMethod,
3538 jni_CallNonvirtualIntMethodV,
3539 jni_CallNonvirtualIntMethodA,
3540 jni_CallNonvirtualLongMethod,
3541 jni_CallNonvirtualLongMethodV,
3542 jni_CallNonvirtualLongMethodA,
3543 jni_CallNonvirtualFloatMethod,
3544 jni_CallNonvirtualFloatMethodV,
3545 jni_CallNonvirtualFloatMethodA,
3546 jni_CallNonvirtualDoubleMethod,
3547 jni_CallNonvirtualDoubleMethodV,
3548 jni_CallNonvirtualDoubleMethodA,
3549 jni_CallNonvirtualVoidMethod,
3550 jni_CallNonvirtualVoidMethodV,
3551 jni_CallNonvirtualVoidMethodA,
3552
3553 jni_GetFieldID,
3554
3555 jni_GetObjectField,
3556 jni_GetBooleanField,
3557 jni_GetByteField,
3558 jni_GetCharField,
3559 jni_GetShortField,
3560 jni_GetIntField,
3561 jni_GetLongField,
3562 jni_GetFloatField,
3563 jni_GetDoubleField,
3564
3565 jni_SetObjectField,
3566 jni_SetBooleanField,
3567 jni_SetByteField,
3568 jni_SetCharField,
3569 jni_SetShortField,
3570 jni_SetIntField,
3571 jni_SetLongField,
3572 jni_SetFloatField,
3573 jni_SetDoubleField,
3574
3575 jni_GetStaticMethodID,
3576
3577 jni_CallStaticObjectMethod,
3578 jni_CallStaticObjectMethodV,
3579 jni_CallStaticObjectMethodA,
3580 jni_CallStaticBooleanMethod,
3581 jni_CallStaticBooleanMethodV,
3582 jni_CallStaticBooleanMethodA,
3583 jni_CallStaticByteMethod,
3584 jni_CallStaticByteMethodV,
3585 jni_CallStaticByteMethodA,
3586 jni_CallStaticCharMethod,
3587 jni_CallStaticCharMethodV,
3588 jni_CallStaticCharMethodA,
3589 jni_CallStaticShortMethod,
3590 jni_CallStaticShortMethodV,
3591 jni_CallStaticShortMethodA,
3592 jni_CallStaticIntMethod,
3593 jni_CallStaticIntMethodV,
3594 jni_CallStaticIntMethodA,
3595 jni_CallStaticLongMethod,
3596 jni_CallStaticLongMethodV,
3597 jni_CallStaticLongMethodA,
3598 jni_CallStaticFloatMethod,
3599 jni_CallStaticFloatMethodV,
3600 jni_CallStaticFloatMethodA,
3601 jni_CallStaticDoubleMethod,
3602 jni_CallStaticDoubleMethodV,
3603 jni_CallStaticDoubleMethodA,
3604 jni_CallStaticVoidMethod,
3605 jni_CallStaticVoidMethodV,
3606 jni_CallStaticVoidMethodA,
3607
3608 jni_GetStaticFieldID,
3609
3610 jni_GetStaticObjectField,
3611 jni_GetStaticBooleanField,
3612 jni_GetStaticByteField,
3613 jni_GetStaticCharField,
3614 jni_GetStaticShortField,
3615 jni_GetStaticIntField,
3616 jni_GetStaticLongField,
3617 jni_GetStaticFloatField,
3618 jni_GetStaticDoubleField,
3619
3620 jni_SetStaticObjectField,
3621 jni_SetStaticBooleanField,
3622 jni_SetStaticByteField,
3623 jni_SetStaticCharField,
3624 jni_SetStaticShortField,
3625 jni_SetStaticIntField,
3626 jni_SetStaticLongField,
3627 jni_SetStaticFloatField,
3628 jni_SetStaticDoubleField,
3629
3630 jni_NewString,
3631 jni_GetStringLength,
3632 jni_GetStringChars,
3633 jni_ReleaseStringChars,
3634
3635 jni_NewStringUTF,
3636 jni_GetStringUTFLength,
3637 jni_GetStringUTFChars,
3638 jni_ReleaseStringUTFChars,
3639
3640 jni_GetArrayLength,
3641
3642 jni_NewObjectArray,
3643 jni_GetObjectArrayElement,
3644 jni_SetObjectArrayElement,
3645
3646 jni_NewBooleanArray,
3647 jni_NewByteArray,
3648 jni_NewCharArray,
3649 jni_NewShortArray,
3650 jni_NewIntArray,
3651 jni_NewLongArray,
3652 jni_NewFloatArray,
3653 jni_NewDoubleArray,
3654
3655 jni_GetBooleanArrayElements,
3656 jni_GetByteArrayElements,
3657 jni_GetCharArrayElements,
3658 jni_GetShortArrayElements,
3659 jni_GetIntArrayElements,
3660 jni_GetLongArrayElements,
3661 jni_GetFloatArrayElements,
3662 jni_GetDoubleArrayElements,
3663
3664 jni_ReleaseBooleanArrayElements,
3665 jni_ReleaseByteArrayElements,
3666 jni_ReleaseCharArrayElements,
3667 jni_ReleaseShortArrayElements,
3668 jni_ReleaseIntArrayElements,
3669 jni_ReleaseLongArrayElements,
3670 jni_ReleaseFloatArrayElements,
3671 jni_ReleaseDoubleArrayElements,
3672
3673 jni_GetBooleanArrayRegion,
3674 jni_GetByteArrayRegion,
3675 jni_GetCharArrayRegion,
3676 jni_GetShortArrayRegion,
3677 jni_GetIntArrayRegion,
3678 jni_GetLongArrayRegion,
3679 jni_GetFloatArrayRegion,
3680 jni_GetDoubleArrayRegion,
3681
3682 jni_SetBooleanArrayRegion,
3683 jni_SetByteArrayRegion,
3684 jni_SetCharArrayRegion,
3685 jni_SetShortArrayRegion,
3686 jni_SetIntArrayRegion,
3687 jni_SetLongArrayRegion,
3688 jni_SetFloatArrayRegion,
3689 jni_SetDoubleArrayRegion,
3690
3691 jni_RegisterNatives,
3692 jni_UnregisterNatives,
3693
3694 jni_MonitorEnter,
3695 jni_MonitorExit,
3696
3697 jni_GetJavaVM,
3698
3699 jni_GetStringRegion,
3700 jni_GetStringUTFRegion,
3701
3702 jni_GetPrimitiveArrayCritical,
3703 jni_ReleasePrimitiveArrayCritical,
3704
3705 jni_GetStringCritical,
3706 jni_ReleaseStringCritical,
3707
3708 jni_NewWeakGlobalRef,
3709 jni_DeleteWeakGlobalRef,
3710
3711 jni_ExceptionCheck,
3712
3713 jni_NewDirectByteBuffer,
3714 jni_GetDirectBufferAddress,
3715 jni_GetDirectBufferCapacity,
3716
3717 // New 1_6 features
3718
3719 jni_GetObjectRefType
3720 };
3721
3722
3723 // For jvmti use to modify jni function table.
3724 // Java threads in native contiues to run until it is transitioned
3725 // to VM at safepoint. Before the transition or before it is blocked
3726 // for safepoint it may access jni function table. VM could crash if
3727 // any java thread access the jni function table in the middle of memcpy.
3728 // To avoid this each function pointers are copied automically.
3729 void copy_jni_function_table(const struct JNINativeInterface_ *new_jni_NativeInterface) {
3730 assert(SafepointSynchronize::is_at_safepoint(), "must be at safepoint");
3731 intptr_t *a = (intptr_t *) jni_functions();
3732 intptr_t *b = (intptr_t *) new_jni_NativeInterface;
3733 for (uint i=0; i < sizeof(struct JNINativeInterface_)/sizeof(void *); i++) {
3734 Atomic::store_ptr(*b++, a++);
3735 }
3736 }
3737
3738 void quicken_jni_functions() {
3739 // Replace Get<Primitive>Field with fast versions
3740 if (UseFastJNIAccessors && !JvmtiExport::can_post_field_access()
3741 && !VerifyJNIFields && !TraceJNICalls && !CountJNICalls && !CheckJNICalls
3742 #if defined(_WINDOWS) && defined(IA32) && defined(COMPILER2)
3743 // windows x86 currently needs SEH wrapper and the gain of the fast
3744 // versions currently isn't certain for server vm on uniprocessor.
3745 && os::is_MP()
3746 #endif
3747 ) {
3748 address func;
3749 func = JNI_FastGetField::generate_fast_get_boolean_field();
3750 if (func != (address)-1) {
3751 jni_NativeInterface.GetBooleanField = (GetBooleanField_t)func;
3752 }
3753 func = JNI_FastGetField::generate_fast_get_byte_field();
3754 if (func != (address)-1) {
3755 jni_NativeInterface.GetByteField = (GetByteField_t)func;
3756 }
3757 func = JNI_FastGetField::generate_fast_get_char_field();
3758 if (func != (address)-1) {
3759 jni_NativeInterface.GetCharField = (GetCharField_t)func;
3760 }
3761 func = JNI_FastGetField::generate_fast_get_short_field();
3762 if (func != (address)-1) {
3763 jni_NativeInterface.GetShortField = (GetShortField_t)func;
3764 }
3765 func = JNI_FastGetField::generate_fast_get_int_field();
3766 if (func != (address)-1) {
3767 jni_NativeInterface.GetIntField = (GetIntField_t)func;
3768 }
3769 func = JNI_FastGetField::generate_fast_get_long_field();
3770 if (func != (address)-1) {
3771 jni_NativeInterface.GetLongField = (GetLongField_t)func;
3772 }
3773 func = JNI_FastGetField::generate_fast_get_float_field();
3774 if (func != (address)-1) {
3775 jni_NativeInterface.GetFloatField = (GetFloatField_t)func;
3776 }
3777 func = JNI_FastGetField::generate_fast_get_double_field();
3778 if (func != (address)-1) {
3779 jni_NativeInterface.GetDoubleField = (GetDoubleField_t)func;
3780 }
3781 }
3782 }
3783
3784 // Returns the function structure
3785 struct JNINativeInterface_* jni_functions() {
3786 #if INCLUDE_JNI_CHECK
3787 if (CheckJNICalls) return jni_functions_check();
3788 #endif // INCLUDE_JNI_CHECK
3789 return &jni_NativeInterface;
3790 }
3791
3792 // Returns the function structure
3793 struct JNINativeInterface_* jni_functions_nocheck() {
3794 return &jni_NativeInterface;
3795 }
3796
3797
3798 // Invocation API
3799
3800
3801 // Forward declaration
3802 extern const struct JNIInvokeInterface_ jni_InvokeInterface;
3803
3804 // Global invocation API vars
3805 volatile jint vm_created = 0;
3806 // Indicate whether it is safe to recreate VM
3807 volatile jint safe_to_recreate_vm = 1;
3808 struct JavaVM_ main_vm = {&jni_InvokeInterface};
3809
3810
3811 #define JAVASTACKSIZE (400 * 1024) /* Default size of a thread java stack */
3812 enum { VERIFY_NONE, VERIFY_REMOTE, VERIFY_ALL };
3813
3814 DT_RETURN_MARK_DECL(GetDefaultJavaVMInitArgs, jint
3815 , HOTSPOT_JNI_GETDEFAULTJAVAVMINITARGS_RETURN(_ret_ref));
3816
3817 _JNI_IMPORT_OR_EXPORT_ jint JNICALL JNI_GetDefaultJavaVMInitArgs(void *args_) {
3818 HOTSPOT_JNI_GETDEFAULTJAVAVMINITARGS_ENTRY(args_);
3819 JDK1_1InitArgs *args = (JDK1_1InitArgs *)args_;
3820 jint ret = JNI_ERR;
3821 DT_RETURN_MARK(GetDefaultJavaVMInitArgs, jint, (const jint&)ret);
3822
3823 if (Threads::is_supported_jni_version(args->version)) {
3824 ret = JNI_OK;
3825 }
3826 // 1.1 style no longer supported in hotspot.
3827 // According the JNI spec, we should update args->version on return.
3828 // We also use the structure to communicate with launcher about default
3829 // stack size.
3830 if (args->version == JNI_VERSION_1_1) {
3831 args->version = JNI_VERSION_1_2;
3832 // javaStackSize is int in arguments structure
3833 assert(jlong(ThreadStackSize) * K < INT_MAX, "integer overflow");
3834 args->javaStackSize = (jint)(ThreadStackSize * K);
3835 }
3836 return ret;
3837 }
3838
3839 #ifndef PRODUCT
3840
3841 #include "gc/shared/collectedHeap.hpp"
3842 #include "gc/shared/gcTimer.hpp"
3843 #if INCLUDE_ALL_GCS
3844 #include "gc/g1/heapRegionRemSet.hpp"
3845 #endif
3846 #include "memory/guardedMemory.hpp"
3847 #include "utilities/ostream.hpp"
3848 #include "utilities/quickSort.hpp"
3849 #if INCLUDE_VM_STRUCTS
3850 #include "runtime/vmStructs.hpp"
3851 #endif
3852
3853 #define run_unit_test(unit_test_function_call) \
3854 tty->print_cr("Running test: " #unit_test_function_call); \
3855 unit_test_function_call
3856
3857 // Forward declaration
3858 void TestOS_test();
3859 void TestReservedSpace_test();
3860 void TestReserveMemorySpecial_test();
3861 void TestVirtualSpace_test();
3862 void TestMetaspaceAux_test();
3863 void TestMetachunk_test();
3864 void TestVirtualSpaceNode_test();
3865 void TestNewSize_test();
3866 void TestOldSize_test();
3867 void TestKlass_test();
3868 void TestBitMap_test();
3869 void TestAsUtf8();
3870 void Test_linked_list();
3871 void TestChunkedList_test();
3872 #if INCLUDE_ALL_GCS
3873 void TestOldFreeSpaceCalculation_test();
3874 void TestG1BiasedArray_test();
3875 void TestBufferingOopClosure_test();
3876 void TestCodeCacheRemSet_test();
3877 void FreeRegionList_test();
3878 #endif
3879
3880 void execute_internal_vm_tests() {
3881 if (ExecuteInternalVMTests) {
3882 tty->print_cr("Running internal VM tests");
3883 run_unit_test(TestOS_test());
3884 run_unit_test(TestReservedSpace_test());
3885 run_unit_test(TestReserveMemorySpecial_test());
3886 run_unit_test(TestVirtualSpace_test());
3887 run_unit_test(TestMetaspaceAux_test());
3888 run_unit_test(TestMetachunk_test());
3889 run_unit_test(TestVirtualSpaceNode_test());
3890 run_unit_test(GlobalDefinitions::test_globals());
3891 run_unit_test(GCTimerAllTest::all());
3892 run_unit_test(arrayOopDesc::test_max_array_length());
3893 run_unit_test(CollectedHeap::test_is_in());
3894 run_unit_test(QuickSort::test_quick_sort());
3895 run_unit_test(GuardedMemory::test_guarded_memory());
3896 run_unit_test(AltHashing::test_alt_hash());
3897 run_unit_test(test_loggc_filename());
3898 run_unit_test(TestNewSize_test());
3899 run_unit_test(TestOldSize_test());
3900 run_unit_test(TestKlass_test());
3901 run_unit_test(TestBitMap_test());
3902 run_unit_test(TestAsUtf8());
3903 run_unit_test(ObjectMonitor::sanity_checks());
3904 run_unit_test(Test_linked_list());
3905 run_unit_test(TestChunkedList_test());
3906 #if INCLUDE_VM_STRUCTS
3907 run_unit_test(VMStructs::test());
3908 #endif
3909 #if INCLUDE_ALL_GCS
3910 run_unit_test(TestOldFreeSpaceCalculation_test());
3911 run_unit_test(TestG1BiasedArray_test());
3912 run_unit_test(HeapRegionRemSet::test_prt());
3913 run_unit_test(TestBufferingOopClosure_test());
3914 run_unit_test(TestCodeCacheRemSet_test());
3915 if (UseG1GC) {
3916 run_unit_test(FreeRegionList_test());
3917 }
3918 #endif
3919 tty->print_cr("All internal VM tests passed");
3920 }
3921 }
3922
3923 #undef run_unit_test
3924
3925 #endif
3926
3927 DT_RETURN_MARK_DECL(CreateJavaVM, jint
3928 , HOTSPOT_JNI_CREATEJAVAVM_RETURN(_ret_ref));
3929
3930 static jint JNI_CreateJavaVM_inner(JavaVM **vm, void **penv, void *args) {
3931 HOTSPOT_JNI_CREATEJAVAVM_ENTRY((void **) vm, penv, args);
3932
3933 jint result = JNI_ERR;
3934 DT_RETURN_MARK(CreateJavaVM, jint, (const jint&)result);
3935
3936 // We're about to use Atomic::xchg for synchronization. Some Zero
3937 // platforms use the GCC builtin __sync_lock_test_and_set for this,
3938 // but __sync_lock_test_and_set is not guaranteed to do what we want
3939 // on all architectures. So we check it works before relying on it.
3940 #if defined(ZERO) && defined(ASSERT)
3941 {
3942 jint a = 0xcafebabe;
3943 jint b = Atomic::xchg(0xdeadbeef, &a);
3944 void *c = &a;
3945 void *d = Atomic::xchg_ptr(&b, &c);
3946 assert(a == (jint) 0xdeadbeef && b == (jint) 0xcafebabe, "Atomic::xchg() works");
3947 assert(c == &b && d == &a, "Atomic::xchg_ptr() works");
3948 }
3949 #endif // ZERO && ASSERT
3950
3951 // At the moment it's only possible to have one Java VM,
3952 // since some of the runtime state is in global variables.
3953
3954 // We cannot use our mutex locks here, since they only work on
3955 // Threads. We do an atomic compare and exchange to ensure only
3956 // one thread can call this method at a time
3957
3958 // We use Atomic::xchg rather than Atomic::add/dec since on some platforms
3959 // the add/dec implementations are dependent on whether we are running
3960 // on a multiprocessor, and at this stage of initialization the os::is_MP
3961 // function used to determine this will always return false. Atomic::xchg
3962 // does not have this problem.
3963 if (Atomic::xchg(1, &vm_created) == 1) {
3964 return JNI_EEXIST; // already created, or create attempt in progress
3965 }
3966 if (Atomic::xchg(0, &safe_to_recreate_vm) == 0) {
3967 return JNI_ERR; // someone tried and failed and retry not allowed.
3968 }
3969
3970 assert(vm_created == 1, "vm_created is true during the creation");
3971
3972 /**
3973 * Certain errors during initialization are recoverable and do not
3974 * prevent this method from being called again at a later time
3975 * (perhaps with different arguments). However, at a certain
3976 * point during initialization if an error occurs we cannot allow
3977 * this function to be called again (or it will crash). In those
3978 * situations, the 'canTryAgain' flag is set to false, which atomically
3979 * sets safe_to_recreate_vm to 1, such that any new call to
3980 * JNI_CreateJavaVM will immediately fail using the above logic.
3981 */
3982 bool can_try_again = true;
3983
3984 result = Threads::create_vm((JavaVMInitArgs*) args, &can_try_again);
3985 if (result == JNI_OK) {
3986 JavaThread *thread = JavaThread::current();
3987 assert(!thread->has_pending_exception(), "should have returned not OK");
3988 /* thread is thread_in_vm here */
3989 *vm = (JavaVM *)(&main_vm);
3990 *(JNIEnv**)penv = thread->jni_environment();
3991
3992 // Tracks the time application was running before GC
3993 RuntimeService::record_application_start();
3994
3995 // Notify JVMTI
3996 if (JvmtiExport::should_post_thread_life()) {
3997 JvmtiExport::post_thread_start(thread);
3998 }
3999
4000 EventThreadStart event;
4001 if (event.should_commit()) {
4002 event.set_javalangthread(java_lang_Thread::thread_id(thread->threadObj()));
4003 event.commit();
4004 }
4005
4006 #ifndef PRODUCT
4007 // Check if we should compile all classes on bootclasspath
4008 if (CompileTheWorld) ClassLoader::compile_the_world();
4009 if (ReplayCompiles) ciReplay::replay(thread);
4010
4011 // Some platforms (like Win*) need a wrapper around these test
4012 // functions in order to properly handle error conditions.
4013 test_error_handler();
4014 execute_internal_vm_tests();
4015 #endif
4016
4017 // Since this is not a JVM_ENTRY we have to set the thread state manually before leaving.
4018 ThreadStateTransition::transition_and_fence(thread, _thread_in_vm, _thread_in_native);
4019 } else {
4020 // If create_vm exits because of a pending exception, exit with that
4021 // exception. In the future when we figure out how to reclaim memory,
4022 // we may be able to exit with JNI_ERR and allow the calling application
4023 // to continue.
4024 if (Universe::is_fully_initialized()) {
4025 // otherwise no pending exception possible - VM will already have aborted
4026 JavaThread* THREAD = JavaThread::current();
4027 if (HAS_PENDING_EXCEPTION) {
4028 HandleMark hm;
4029 vm_exit_during_initialization(Handle(THREAD, PENDING_EXCEPTION));
4030 }
4031 }
4032
4033 if (can_try_again) {
4034 // reset safe_to_recreate_vm to 1 so that retrial would be possible
4035 safe_to_recreate_vm = 1;
4036 }
4037
4038 // Creation failed. We must reset vm_created
4039 *vm = 0;
4040 *(JNIEnv**)penv = 0;
4041 // reset vm_created last to avoid race condition. Use OrderAccess to
4042 // control both compiler and architectural-based reordering.
4043 OrderAccess::release_store(&vm_created, 0);
4044 }
4045
4046 return result;
4047
4048 }
4049
4050 _JNI_IMPORT_OR_EXPORT_ jint JNICALL JNI_CreateJavaVM(JavaVM **vm, void **penv, void *args) {
4051 jint result = 0;
4052 // On Windows, let CreateJavaVM run with SEH protection
4053 #ifdef _WIN32
4054 __try {
4055 #endif
4056 result = JNI_CreateJavaVM_inner(vm, penv, args);
4057 #ifdef _WIN32
4058 } __except(topLevelExceptionFilter((_EXCEPTION_POINTERS*)_exception_info())) {
4059 // Nothing to do.
4060 }
4061 #endif
4062 return result;
4063 }
4064
4065 _JNI_IMPORT_OR_EXPORT_ jint JNICALL JNI_GetCreatedJavaVMs(JavaVM **vm_buf, jsize bufLen, jsize *numVMs) {
4066 // See bug 4367188, the wrapper can sometimes cause VM crashes
4067 // JNIWrapper("GetCreatedJavaVMs");
4068
4069 HOTSPOT_JNI_GETCREATEDJAVAVMS_ENTRY((void **) vm_buf, bufLen, (uintptr_t *) numVMs);
4070
4071 if (vm_created) {
4072 if (numVMs != NULL) *numVMs = 1;
4073 if (bufLen > 0) *vm_buf = (JavaVM *)(&main_vm);
4074 } else {
4075 if (numVMs != NULL) *numVMs = 0;
4076 }
4077 HOTSPOT_JNI_GETCREATEDJAVAVMS_RETURN(JNI_OK);
4078 return JNI_OK;
4079 }
4080
4081 extern "C" {
4082
4083 DT_RETURN_MARK_DECL(DestroyJavaVM, jint
4084 , HOTSPOT_JNI_DESTROYJAVAVM_RETURN(_ret_ref));
4085
4086 jint JNICALL jni_DestroyJavaVM(JavaVM *vm) {
4087 HOTSPOT_JNI_DESTROYJAVAVM_ENTRY(vm);
4088 jint res = JNI_ERR;
4089 DT_RETURN_MARK(DestroyJavaVM, jint, (const jint&)res);
4090
4091 if (!vm_created) {
4092 res = JNI_ERR;
4093 return res;
4094 }
4095
4096 JNIWrapper("DestroyJavaVM");
4097 JNIEnv *env;
4098 JavaVMAttachArgs destroyargs;
4099 destroyargs.version = CurrentVersion;
4100 destroyargs.name = (char *)"DestroyJavaVM";
4101 destroyargs.group = NULL;
4102 res = vm->AttachCurrentThread((void **)&env, (void *)&destroyargs);
4103 if (res != JNI_OK) {
4104 return res;
4105 }
4106
4107 // Since this is not a JVM_ENTRY we have to set the thread state manually before entering.
4108 JavaThread* thread = JavaThread::current();
4109 ThreadStateTransition::transition_from_native(thread, _thread_in_vm);
4110 if (Threads::destroy_vm()) {
4111 // Should not change thread state, VM is gone
4112 vm_created = false;
4113 res = JNI_OK;
4114 return res;
4115 } else {
4116 ThreadStateTransition::transition_and_fence(thread, _thread_in_vm, _thread_in_native);
4117 res = JNI_ERR;
4118 return res;
4119 }
4120 }
4121
4122
4123 static jint attach_current_thread(JavaVM *vm, void **penv, void *_args, bool daemon) {
4124 JavaVMAttachArgs *args = (JavaVMAttachArgs *) _args;
4125
4126 // Check below commented out from JDK1.2fcs as well
4127 /*
4128 if (args && (args->version != JNI_VERSION_1_1 || args->version != JNI_VERSION_1_2)) {
4129 return JNI_EVERSION;
4130 }
4131 */
4132
4133 Thread* t = ThreadLocalStorage::get_thread_slow();
4134 if (t != NULL) {
4135 // If the thread has been attached this operation is a no-op
4136 *(JNIEnv**)penv = ((JavaThread*) t)->jni_environment();
4137 return JNI_OK;
4138 }
4139
4140 // Create a thread and mark it as attaching so it will be skipped by the
4141 // ThreadsListEnumerator - see CR 6404306
4142 JavaThread* thread = new JavaThread(true);
4143
4144 // Set correct safepoint info. The thread is going to call into Java when
4145 // initializing the Java level thread object. Hence, the correct state must
4146 // be set in order for the Safepoint code to deal with it correctly.
4147 thread->set_thread_state(_thread_in_vm);
4148 // Must do this before initialize_thread_local_storage
4149 thread->record_stack_base_and_size();
4150
4151 thread->initialize_thread_local_storage();
4152
4153 if (!os::create_attached_thread(thread)) {
4154 delete thread;
4155 return JNI_ERR;
4156 }
4157 // Enable stack overflow checks
4158 thread->create_stack_guard_pages();
4159
4160 thread->initialize_tlab();
4161
4162 thread->cache_global_variables();
4163
4164 // Crucial that we do not have a safepoint check for this thread, since it has
4165 // not been added to the Thread list yet.
4166 { Threads_lock->lock_without_safepoint_check();
4167 // This must be inside this lock in order to get FullGCALot to work properly, i.e., to
4168 // avoid this thread trying to do a GC before it is added to the thread-list
4169 thread->set_active_handles(JNIHandleBlock::allocate_block());
4170 Threads::add(thread, daemon);
4171 Threads_lock->unlock();
4172 }
4173 // Create thread group and name info from attach arguments
4174 oop group = NULL;
4175 char* thread_name = NULL;
4176 if (args != NULL && Threads::is_supported_jni_version(args->version)) {
4177 group = JNIHandles::resolve(args->group);
4178 thread_name = args->name; // may be NULL
4179 }
4180 if (group == NULL) group = Universe::main_thread_group();
4181
4182 // Create Java level thread object and attach it to this thread
4183 bool attach_failed = false;
4184 {
4185 EXCEPTION_MARK;
4186 HandleMark hm(THREAD);
4187 Handle thread_group(THREAD, group);
4188 thread->allocate_threadObj(thread_group, thread_name, daemon, THREAD);
4189 if (HAS_PENDING_EXCEPTION) {
4190 CLEAR_PENDING_EXCEPTION;
4191 // cleanup outside the handle mark.
4192 attach_failed = true;
4193 }
4194 }
4195
4196 if (attach_failed) {
4197 // Added missing cleanup
4198 thread->cleanup_failed_attach_current_thread();
4199 return JNI_ERR;
4200 }
4201
4202 // mark the thread as no longer attaching
4203 // this uses a fence to push the change through so we don't have
4204 // to regrab the threads_lock
4205 thread->set_done_attaching_via_jni();
4206
4207 // Set java thread status.
4208 java_lang_Thread::set_thread_status(thread->threadObj(),
4209 java_lang_Thread::RUNNABLE);
4210
4211 // Notify the debugger
4212 if (JvmtiExport::should_post_thread_life()) {
4213 JvmtiExport::post_thread_start(thread);
4214 }
4215
4216 EventThreadStart event;
4217 if (event.should_commit()) {
4218 event.set_javalangthread(java_lang_Thread::thread_id(thread->threadObj()));
4219 event.commit();
4220 }
4221
4222 *(JNIEnv**)penv = thread->jni_environment();
4223
4224 // Now leaving the VM, so change thread_state. This is normally automatically taken care
4225 // of in the JVM_ENTRY. But in this situation we have to do it manually. Notice, that by
4226 // using ThreadStateTransition::transition, we do a callback to the safepoint code if
4227 // needed.
4228
4229 ThreadStateTransition::transition_and_fence(thread, _thread_in_vm, _thread_in_native);
4230
4231 // Perform any platform dependent FPU setup
4232 os::setup_fpu();
4233
4234 return JNI_OK;
4235 }
4236
4237
4238 jint JNICALL jni_AttachCurrentThread(JavaVM *vm, void **penv, void *_args) {
4239 HOTSPOT_JNI_ATTACHCURRENTTHREAD_ENTRY(vm, penv, _args);
4240 if (!vm_created) {
4241 HOTSPOT_JNI_ATTACHCURRENTTHREAD_RETURN((uint32_t) JNI_ERR);
4242 return JNI_ERR;
4243 }
4244
4245 JNIWrapper("AttachCurrentThread");
4246 jint ret = attach_current_thread(vm, penv, _args, false);
4247 HOTSPOT_JNI_ATTACHCURRENTTHREAD_RETURN(ret);
4248 return ret;
4249 }
4250
4251
4252 jint JNICALL jni_DetachCurrentThread(JavaVM *vm) {
4253 HOTSPOT_JNI_DETACHCURRENTTHREAD_ENTRY(vm);
4254 VM_Exit::block_if_vm_exited();
4255
4256 JNIWrapper("DetachCurrentThread");
4257
4258 // If the thread has been deattacted the operations is a no-op
4259 if (ThreadLocalStorage::thread() == NULL) {
4260 HOTSPOT_JNI_DETACHCURRENTTHREAD_RETURN(JNI_OK);
4261 return JNI_OK;
4262 }
4263
4264 JavaThread* thread = JavaThread::current();
4265 if (thread->has_last_Java_frame()) {
4266 HOTSPOT_JNI_DETACHCURRENTTHREAD_RETURN((uint32_t) JNI_ERR);
4267 // Can't detach a thread that's running java, that can't work.
4268 return JNI_ERR;
4269 }
4270
4271 // Safepoint support. Have to do call-back to safepoint code, if in the
4272 // middel of a safepoint operation
4273 ThreadStateTransition::transition_from_native(thread, _thread_in_vm);
4274
4275 // XXX: Note that JavaThread::exit() call below removes the guards on the
4276 // stack pages set up via enable_stack_{red,yellow}_zone() calls
4277 // above in jni_AttachCurrentThread. Unfortunately, while the setting
4278 // of the guards is visible in jni_AttachCurrentThread above,
4279 // the removal of the guards is buried below in JavaThread::exit()
4280 // here. The abstraction should be more symmetrically either exposed
4281 // or hidden (e.g. it could probably be hidden in the same
4282 // (platform-dependent) methods where we do alternate stack
4283 // maintenance work?)
4284 thread->exit(false, JavaThread::jni_detach);
4285 delete thread;
4286
4287 HOTSPOT_JNI_DETACHCURRENTTHREAD_RETURN(JNI_OK);
4288 return JNI_OK;
4289 }
4290
4291 DT_RETURN_MARK_DECL(GetEnv, jint
4292 , HOTSPOT_JNI_GETENV_RETURN(_ret_ref));
4293
4294 jint JNICALL jni_GetEnv(JavaVM *vm, void **penv, jint version) {
4295 HOTSPOT_JNI_GETENV_ENTRY(vm, penv, version);
4296 jint ret = JNI_ERR;
4297 DT_RETURN_MARK(GetEnv, jint, (const jint&)ret);
4298
4299 if (!vm_created) {
4300 *penv = NULL;
4301 ret = JNI_EDETACHED;
4302 return ret;
4303 }
4304
4305 if (JniExportedInterface::GetExportedInterface(vm, penv, version, &ret)) {
4306 return ret;
4307 }
4308
4309 #ifndef JVMPI_VERSION_1
4310 // need these in order to be polite about older agents
4311 #define JVMPI_VERSION_1 ((jint)0x10000001)
4312 #define JVMPI_VERSION_1_1 ((jint)0x10000002)
4313 #define JVMPI_VERSION_1_2 ((jint)0x10000003)
4314 #endif // !JVMPI_VERSION_1
4315
4316 Thread* thread = ThreadLocalStorage::thread();
4317 if (thread != NULL && thread->is_Java_thread()) {
4318 if (Threads::is_supported_jni_version_including_1_1(version)) {
4319 *(JNIEnv**)penv = ((JavaThread*) thread)->jni_environment();
4320 ret = JNI_OK;
4321 return ret;
4322
4323 } else if (version == JVMPI_VERSION_1 ||
4324 version == JVMPI_VERSION_1_1 ||
4325 version == JVMPI_VERSION_1_2) {
4326 tty->print_cr("ERROR: JVMPI, an experimental interface, is no longer supported.");
4327 tty->print_cr("Please use the supported interface: the JVM Tool Interface (JVM TI).");
4328 ret = JNI_EVERSION;
4329 return ret;
4330 } else if (JvmtiExport::is_jvmdi_version(version)) {
4331 tty->print_cr("FATAL ERROR: JVMDI is no longer supported.");
4332 tty->print_cr("Please use the supported interface: the JVM Tool Interface (JVM TI).");
4333 ret = JNI_EVERSION;
4334 return ret;
4335 } else {
4336 *penv = NULL;
4337 ret = JNI_EVERSION;
4338 return ret;
4339 }
4340 } else {
4341 *penv = NULL;
4342 ret = JNI_EDETACHED;
4343 return ret;
4344 }
4345 }
4346
4347
4348 jint JNICALL jni_AttachCurrentThreadAsDaemon(JavaVM *vm, void **penv, void *_args) {
4349 HOTSPOT_JNI_ATTACHCURRENTTHREADASDAEMON_ENTRY(vm, penv, _args);
4350 if (!vm_created) {
4351 HOTSPOT_JNI_ATTACHCURRENTTHREADASDAEMON_RETURN((uint32_t) JNI_ERR);
4352 return JNI_ERR;
4353 }
4354
4355 JNIWrapper("AttachCurrentThreadAsDaemon");
4356 jint ret = attach_current_thread(vm, penv, _args, true);
4357 HOTSPOT_JNI_ATTACHCURRENTTHREADASDAEMON_RETURN(ret);
4358 return ret;
4359 }
4360
4361
4362 } // End extern "C"
4363
4364 const struct JNIInvokeInterface_ jni_InvokeInterface = {
4365 NULL,
4366 NULL,
4367 NULL,
4368
4369 jni_DestroyJavaVM,
4370 jni_AttachCurrentThread,
4371 jni_DetachCurrentThread,
4372 jni_GetEnv,
4373 jni_AttachCurrentThreadAsDaemon
4374 };