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 if (oopDesc::is_null(mirror)) {
411 loader = Handle(THREAD, SystemDictionary::java_system_loader());
412 } else {
413 loader = Handle(THREAD,
414 InstanceKlass::cast(java_lang_Class::as_Klass(mirror))->class_loader());
415 protection_domain = Handle(THREAD,
416 InstanceKlass::cast(java_lang_Class::as_Klass(mirror))->protection_domain());
417 }
418 }
419 } else {
420 // We call ClassLoader.getSystemClassLoader to obtain the system class loader.
421 loader = Handle(THREAD, SystemDictionary::java_system_loader());
422 }
423
424 TempNewSymbol sym = SymbolTable::new_symbol(name, CHECK_NULL);
425 result = find_class_from_class_loader(env, sym, true, loader,
426 protection_domain, true, thread);
427
428 if (TraceClassResolution && result != NULL) {
429 trace_class_resolution(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(result)));
430 }
431
432 // If we were the first invocation of jni_FindClass, we enable compilation again
433 // rather than just allowing invocation counter to overflow and decay.
434 // Controlled by flag DelayCompilationDuringStartup.
435 if (first_time && !CompileTheWorld)
436 CompilationPolicy::completed_vm_startup();
437
438 return result;
439 JNI_END
440
441 DT_RETURN_MARK_DECL(FromReflectedMethod, jmethodID
442 , HOTSPOT_JNI_FROMREFLECTEDMETHOD_RETURN((uintptr_t)_ret_ref));
443
444 JNI_ENTRY(jmethodID, jni_FromReflectedMethod(JNIEnv *env, jobject method))
445 JNIWrapper("FromReflectedMethod");
446
447 HOTSPOT_JNI_FROMREFLECTEDMETHOD_ENTRY(env, method);
448
449 jmethodID ret = NULL;
450 DT_RETURN_MARK(FromReflectedMethod, jmethodID, (const jmethodID&)ret);
451
452 // method is a handle to a java.lang.reflect.Method object
453 oop reflected = JNIHandles::resolve_non_null(method);
454 oop mirror = NULL;
455 int slot = 0;
456
457 if (reflected->klass() == SystemDictionary::reflect_Constructor_klass()) {
458 mirror = java_lang_reflect_Constructor::clazz(reflected);
459 slot = java_lang_reflect_Constructor::slot(reflected);
460 } else {
461 assert(reflected->klass() == SystemDictionary::reflect_Method_klass(), "wrong type");
462 mirror = java_lang_reflect_Method::clazz(reflected);
463 slot = java_lang_reflect_Method::slot(reflected);
464 }
465 Klass* k = java_lang_Class::as_Klass(mirror);
466
467 KlassHandle k1(THREAD, k);
468 // Make sure class is initialized before handing id's out to methods
469 k1()->initialize(CHECK_NULL);
470 Method* m = InstanceKlass::cast(k1())->method_with_idnum(slot);
471 ret = m==NULL? NULL : m->jmethod_id(); // return NULL if reflected method deleted
472 return ret;
473 JNI_END
474
475 DT_RETURN_MARK_DECL(FromReflectedField, jfieldID
476 , HOTSPOT_JNI_FROMREFLECTEDFIELD_RETURN((uintptr_t)_ret_ref));
477
478 JNI_ENTRY(jfieldID, jni_FromReflectedField(JNIEnv *env, jobject field))
479 JNIWrapper("FromReflectedField");
480
481 HOTSPOT_JNI_FROMREFLECTEDFIELD_ENTRY(env, field);
482
483 jfieldID ret = NULL;
484 DT_RETURN_MARK(FromReflectedField, jfieldID, (const jfieldID&)ret);
485
486 // field is a handle to a java.lang.reflect.Field object
487 oop reflected = JNIHandles::resolve_non_null(field);
488 oop mirror = java_lang_reflect_Field::clazz(reflected);
489 Klass* k = java_lang_Class::as_Klass(mirror);
490 int slot = java_lang_reflect_Field::slot(reflected);
491 int modifiers = java_lang_reflect_Field::modifiers(reflected);
492
493 KlassHandle k1(THREAD, k);
494 // Make sure class is initialized before handing id's out to fields
495 k1()->initialize(CHECK_NULL);
496
497 // First check if this is a static field
498 if (modifiers & JVM_ACC_STATIC) {
499 intptr_t offset = InstanceKlass::cast(k1())->field_offset( slot );
500 JNIid* id = InstanceKlass::cast(k1())->jni_id_for(offset);
501 assert(id != NULL, "corrupt Field object");
502 debug_only(id->set_is_static_field_id();)
503 // A jfieldID for a static field is a JNIid specifying the field holder and the offset within the Klass*
504 ret = jfieldIDWorkaround::to_static_jfieldID(id);
505 return ret;
506 }
507
508 // The slot is the index of the field description in the field-array
509 // The jfieldID is the offset of the field within the object
510 // It may also have hash bits for k, if VerifyJNIFields is turned on.
511 intptr_t offset = InstanceKlass::cast(k1())->field_offset( slot );
512 assert(InstanceKlass::cast(k1())->contains_field_offset(offset), "stay within object");
513 ret = jfieldIDWorkaround::to_instance_jfieldID(k1(), offset);
514 return ret;
515 JNI_END
516
517
518 DT_RETURN_MARK_DECL(ToReflectedMethod, jobject
519 , HOTSPOT_JNI_TOREFLECTEDMETHOD_RETURN(_ret_ref));
520
521 JNI_ENTRY(jobject, jni_ToReflectedMethod(JNIEnv *env, jclass cls, jmethodID method_id, jboolean isStatic))
522 JNIWrapper("ToReflectedMethod");
523
524 HOTSPOT_JNI_TOREFLECTEDMETHOD_ENTRY(env, cls, (uintptr_t) method_id, isStatic);
525
526 jobject ret = NULL;
527 DT_RETURN_MARK(ToReflectedMethod, jobject, (const jobject&)ret);
528
529 methodHandle m (THREAD, Method::resolve_jmethod_id(method_id));
530 assert(m->is_static() == (isStatic != 0), "jni_ToReflectedMethod access flags doesn't match");
531 oop reflection_method;
532 if (m->is_initializer()) {
533 reflection_method = Reflection::new_constructor(m, CHECK_NULL);
534 } else {
535 reflection_method = Reflection::new_method(m, false, CHECK_NULL);
536 }
537 ret = JNIHandles::make_local(env, reflection_method);
538 return ret;
539 JNI_END
540
541 DT_RETURN_MARK_DECL(GetSuperclass, jclass
542 , HOTSPOT_JNI_GETSUPERCLASS_RETURN(_ret_ref));
543
544 JNI_ENTRY(jclass, jni_GetSuperclass(JNIEnv *env, jclass sub))
545 JNIWrapper("GetSuperclass");
546
547 HOTSPOT_JNI_GETSUPERCLASS_ENTRY(env, sub);
548
549 jclass obj = NULL;
550 DT_RETURN_MARK(GetSuperclass, jclass, (const jclass&)obj);
551
552 oop mirror = JNIHandles::resolve_non_null(sub);
553 // primitive classes return NULL
554 if (java_lang_Class::is_primitive(mirror)) return NULL;
555
556 // Rules of Class.getSuperClass as implemented by KLass::java_super:
557 // arrays return Object
558 // interfaces return NULL
559 // proper classes return Klass::super()
560 Klass* k = java_lang_Class::as_Klass(mirror);
561 if (k->is_interface()) return NULL;
562
563 // return mirror for superclass
564 Klass* super = k->java_super();
565 // super2 is the value computed by the compiler's getSuperClass intrinsic:
566 debug_only(Klass* super2 = ( k->oop_is_array()
567 ? SystemDictionary::Object_klass()
568 : k->super() ) );
569 assert(super == super2,
570 "java_super computation depends on interface, array, other super");
571 obj = (super == NULL) ? NULL : (jclass) JNIHandles::make_local(super->java_mirror());
572 return obj;
573 JNI_END
574
575 JNI_QUICK_ENTRY(jboolean, jni_IsAssignableFrom(JNIEnv *env, jclass sub, jclass super))
576 JNIWrapper("IsSubclassOf");
577
578 HOTSPOT_JNI_ISASSIGNABLEFROM_ENTRY(env, sub, super);
579
580 oop sub_mirror = JNIHandles::resolve_non_null(sub);
581 oop super_mirror = JNIHandles::resolve_non_null(super);
582 if (java_lang_Class::is_primitive(sub_mirror) ||
583 java_lang_Class::is_primitive(super_mirror)) {
584 jboolean ret = (sub_mirror == super_mirror);
585
586 HOTSPOT_JNI_ISASSIGNABLEFROM_RETURN(ret);
587 return ret;
588 }
589 Klass* sub_klass = java_lang_Class::as_Klass(sub_mirror);
590 Klass* super_klass = java_lang_Class::as_Klass(super_mirror);
591 assert(sub_klass != NULL && super_klass != NULL, "invalid arguments to jni_IsAssignableFrom");
592 jboolean ret = sub_klass->is_subtype_of(super_klass) ?
593 JNI_TRUE : JNI_FALSE;
594
595 HOTSPOT_JNI_ISASSIGNABLEFROM_RETURN(ret);
596 return ret;
597 JNI_END
598
599
600 DT_RETURN_MARK_DECL(Throw, jint
601 , HOTSPOT_JNI_THROW_RETURN(_ret_ref));
602
603 JNI_ENTRY(jint, jni_Throw(JNIEnv *env, jthrowable obj))
604 JNIWrapper("Throw");
605
606 HOTSPOT_JNI_THROW_ENTRY(env, obj);
607
608 jint ret = JNI_OK;
609 DT_RETURN_MARK(Throw, jint, (const jint&)ret);
610
611 THROW_OOP_(JNIHandles::resolve(obj), JNI_OK);
612 ShouldNotReachHere();
613 return 0; // Mute compiler.
614 JNI_END
615
616
617 DT_RETURN_MARK_DECL(ThrowNew, jint
618 , HOTSPOT_JNI_THROWNEW_RETURN(_ret_ref));
619
620 JNI_ENTRY(jint, jni_ThrowNew(JNIEnv *env, jclass clazz, const char *message))
621 JNIWrapper("ThrowNew");
622
623 HOTSPOT_JNI_THROWNEW_ENTRY(env, clazz, (char *) message);
624
625 jint ret = JNI_OK;
626 DT_RETURN_MARK(ThrowNew, jint, (const jint&)ret);
627
628 InstanceKlass* k = InstanceKlass::cast(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz)));
629 Symbol* name = k->name();
630 Handle class_loader (THREAD, k->class_loader());
631 Handle protection_domain (THREAD, k->protection_domain());
632 THROW_MSG_LOADER_(name, (char *)message, class_loader, protection_domain, JNI_OK);
633 ShouldNotReachHere();
634 return 0; // Mute compiler.
635 JNI_END
636
637
638 // JNI functions only transform a pending async exception to a synchronous
639 // exception in ExceptionOccurred and ExceptionCheck calls, since
640 // delivering an async exception in other places won't change the native
641 // code's control flow and would be harmful when native code further calls
642 // JNI functions with a pending exception. Async exception is also checked
643 // during the call, so ExceptionOccurred/ExceptionCheck won't return
644 // false but deliver the async exception at the very end during
645 // state transition.
646
647 static void jni_check_async_exceptions(JavaThread *thread) {
648 assert(thread == Thread::current(), "must be itself");
649 thread->check_and_handle_async_exceptions();
650 }
651
652 JNI_ENTRY_NO_PRESERVE(jthrowable, jni_ExceptionOccurred(JNIEnv *env))
653 JNIWrapper("ExceptionOccurred");
654
655 HOTSPOT_JNI_EXCEPTIONOCCURRED_ENTRY(env);
656
657 jni_check_async_exceptions(thread);
658 oop exception = thread->pending_exception();
659 jthrowable ret = (jthrowable) JNIHandles::make_local(env, exception);
660
661 HOTSPOT_JNI_EXCEPTIONOCCURRED_RETURN(ret);
662 return ret;
663 JNI_END
664
665
666 JNI_ENTRY_NO_PRESERVE(void, jni_ExceptionDescribe(JNIEnv *env))
667 JNIWrapper("ExceptionDescribe");
668
669 HOTSPOT_JNI_EXCEPTIONDESCRIBE_ENTRY(env);
670
671 if (thread->has_pending_exception()) {
672 Handle ex(thread, thread->pending_exception());
673 thread->clear_pending_exception();
674 if (ex->is_a(SystemDictionary::ThreadDeath_klass())) {
675 // Don't print anything if we are being killed.
676 } else {
677 jio_fprintf(defaultStream::error_stream(), "Exception ");
678 if (thread != NULL && thread->threadObj() != NULL) {
679 ResourceMark rm(THREAD);
680 jio_fprintf(defaultStream::error_stream(),
681 "in thread \"%s\" ", thread->get_thread_name());
682 }
683 if (ex->is_a(SystemDictionary::Throwable_klass())) {
684 JavaValue result(T_VOID);
685 JavaCalls::call_virtual(&result,
686 ex,
687 KlassHandle(THREAD,
688 SystemDictionary::Throwable_klass()),
689 vmSymbols::printStackTrace_name(),
690 vmSymbols::void_method_signature(),
691 THREAD);
692 // If an exception is thrown in the call it gets thrown away. Not much
693 // we can do with it. The native code that calls this, does not check
694 // for the exception - hence, it might still be in the thread when DestroyVM gets
695 // called, potentially causing a few asserts to trigger - since no pending exception
696 // is expected.
697 CLEAR_PENDING_EXCEPTION;
698 } else {
699 ResourceMark rm(THREAD);
700 jio_fprintf(defaultStream::error_stream(),
701 ". Uncaught exception of type %s.",
702 ex->klass()->external_name());
703 }
704 }
705 }
706
707 HOTSPOT_JNI_EXCEPTIONDESCRIBE_RETURN();
708 JNI_END
709
710
711 JNI_QUICK_ENTRY(void, jni_ExceptionClear(JNIEnv *env))
712 JNIWrapper("ExceptionClear");
713
714 HOTSPOT_JNI_EXCEPTIONCLEAR_ENTRY(env);
715
716 // The jni code might be using this API to clear java thrown exception.
717 // So just mark jvmti thread exception state as exception caught.
718 JvmtiThreadState *state = JavaThread::current()->jvmti_thread_state();
719 if (state != NULL && state->is_exception_detected()) {
720 state->set_exception_caught();
721 }
722 thread->clear_pending_exception();
723
724 HOTSPOT_JNI_EXCEPTIONCLEAR_RETURN();
725 JNI_END
726
727
728 JNI_ENTRY(void, jni_FatalError(JNIEnv *env, const char *msg))
729 JNIWrapper("FatalError");
730
731 HOTSPOT_JNI_FATALERROR_ENTRY(env, (char *) msg);
732
733 tty->print_cr("FATAL ERROR in native method: %s", msg);
734 thread->print_stack();
735 os::abort(); // Dump core and abort
736 JNI_END
737
738
739 JNI_ENTRY(jint, jni_PushLocalFrame(JNIEnv *env, jint capacity))
740 JNIWrapper("PushLocalFrame");
741
742 HOTSPOT_JNI_PUSHLOCALFRAME_ENTRY(env, capacity);
743
744 //%note jni_11
745 if (capacity < 0 ||
746 ((MaxJNILocalCapacity > 0) && (capacity > MaxJNILocalCapacity))) {
747 HOTSPOT_JNI_PUSHLOCALFRAME_RETURN((uint32_t)JNI_ERR);
748 return JNI_ERR;
749 }
750 JNIHandleBlock* old_handles = thread->active_handles();
751 JNIHandleBlock* new_handles = JNIHandleBlock::allocate_block(thread);
752 assert(new_handles != NULL, "should not be NULL");
753 new_handles->set_pop_frame_link(old_handles);
754 thread->set_active_handles(new_handles);
755 jint ret = JNI_OK;
756 HOTSPOT_JNI_PUSHLOCALFRAME_RETURN(ret);
757 return ret;
758 JNI_END
759
760
761 JNI_ENTRY(jobject, jni_PopLocalFrame(JNIEnv *env, jobject result))
762 JNIWrapper("PopLocalFrame");
763
764 HOTSPOT_JNI_POPLOCALFRAME_ENTRY(env, result);
765
766 //%note jni_11
767 Handle result_handle(thread, JNIHandles::resolve(result));
768 JNIHandleBlock* old_handles = thread->active_handles();
769 JNIHandleBlock* new_handles = old_handles->pop_frame_link();
770 if (new_handles != NULL) {
771 // As a sanity check we only release the handle blocks if the pop_frame_link is not NULL.
772 // This way code will still work if PopLocalFrame is called without a corresponding
773 // PushLocalFrame call. Note that we set the pop_frame_link to NULL explicitly, otherwise
774 // the release_block call will release the blocks.
775 thread->set_active_handles(new_handles);
776 old_handles->set_pop_frame_link(NULL); // clear link we won't release new_handles below
777 JNIHandleBlock::release_block(old_handles, thread); // may block
778 result = JNIHandles::make_local(thread, result_handle());
779 }
780 HOTSPOT_JNI_POPLOCALFRAME_RETURN(result);
781 return result;
782 JNI_END
783
784
785 JNI_ENTRY(jobject, jni_NewGlobalRef(JNIEnv *env, jobject ref))
786 JNIWrapper("NewGlobalRef");
787
788 HOTSPOT_JNI_NEWGLOBALREF_ENTRY(env, ref);
789
790 Handle ref_handle(thread, JNIHandles::resolve(ref));
791 jobject ret = JNIHandles::make_global(ref_handle);
792
793 HOTSPOT_JNI_NEWGLOBALREF_RETURN(ret);
794 return ret;
795 JNI_END
796
797 // Must be JNI_ENTRY (with HandleMark)
798 JNI_ENTRY_NO_PRESERVE(void, jni_DeleteGlobalRef(JNIEnv *env, jobject ref))
799 JNIWrapper("DeleteGlobalRef");
800
801 HOTSPOT_JNI_DELETEGLOBALREF_ENTRY(env, ref);
802
803 JNIHandles::destroy_global(ref);
804
805 HOTSPOT_JNI_DELETEGLOBALREF_RETURN();
806 JNI_END
807
808 JNI_QUICK_ENTRY(void, jni_DeleteLocalRef(JNIEnv *env, jobject obj))
809 JNIWrapper("DeleteLocalRef");
810
811 HOTSPOT_JNI_DELETELOCALREF_ENTRY(env, obj);
812
813 JNIHandles::destroy_local(obj);
814
815 HOTSPOT_JNI_DELETELOCALREF_RETURN();
816 JNI_END
817
818 JNI_QUICK_ENTRY(jboolean, jni_IsSameObject(JNIEnv *env, jobject r1, jobject r2))
819 JNIWrapper("IsSameObject");
820
821 HOTSPOT_JNI_ISSAMEOBJECT_ENTRY(env, r1, r2);
822
823 oop a = JNIHandles::resolve(r1);
824 oop b = JNIHandles::resolve(r2);
825 jboolean ret = (a == b) ? JNI_TRUE : JNI_FALSE;
826
827 HOTSPOT_JNI_ISSAMEOBJECT_RETURN(ret);
828 return ret;
829 JNI_END
830
831
832 JNI_ENTRY(jobject, jni_NewLocalRef(JNIEnv *env, jobject ref))
833 JNIWrapper("NewLocalRef");
834
835 HOTSPOT_JNI_NEWLOCALREF_ENTRY(env, ref);
836
837 jobject ret = JNIHandles::make_local(env, JNIHandles::resolve(ref));
838
839 HOTSPOT_JNI_NEWLOCALREF_RETURN(ret);
840 return ret;
841 JNI_END
842
843 JNI_LEAF(jint, jni_EnsureLocalCapacity(JNIEnv *env, jint capacity))
844 JNIWrapper("EnsureLocalCapacity");
845
846 HOTSPOT_JNI_ENSURELOCALCAPACITY_ENTRY(env, capacity);
847
848 jint ret;
849 if (capacity >= 0 &&
850 ((MaxJNILocalCapacity <= 0) || (capacity <= MaxJNILocalCapacity))) {
851 ret = JNI_OK;
852 } else {
853 ret = JNI_ERR;
854 }
855
856 HOTSPOT_JNI_ENSURELOCALCAPACITY_RETURN(ret);
857 return ret;
858 JNI_END
859
860 // Return the Handle Type
861 JNI_LEAF(jobjectRefType, jni_GetObjectRefType(JNIEnv *env, jobject obj))
862 JNIWrapper("GetObjectRefType");
863
864 HOTSPOT_JNI_GETOBJECTREFTYPE_ENTRY(env, obj);
865
866 jobjectRefType ret;
867 if (JNIHandles::is_local_handle(thread, obj) ||
868 JNIHandles::is_frame_handle(thread, obj))
869 ret = JNILocalRefType;
870 else if (JNIHandles::is_global_handle(obj))
871 ret = JNIGlobalRefType;
872 else if (JNIHandles::is_weak_global_handle(obj))
873 ret = JNIWeakGlobalRefType;
874 else
875 ret = JNIInvalidRefType;
876
877 HOTSPOT_JNI_GETOBJECTREFTYPE_RETURN((void *) ret);
878 return ret;
879 JNI_END
880
881
882 class JNI_ArgumentPusher : public SignatureIterator {
883 protected:
884 JavaCallArguments* _arguments;
885
886 virtual void get_bool () = 0;
887 virtual void get_char () = 0;
888 virtual void get_short () = 0;
889 virtual void get_byte () = 0;
890 virtual void get_int () = 0;
891 virtual void get_long () = 0;
892 virtual void get_float () = 0;
893 virtual void get_double () = 0;
894 virtual void get_object () = 0;
895
896 JNI_ArgumentPusher(Symbol* signature) : SignatureIterator(signature) {
897 this->_return_type = T_ILLEGAL;
898 _arguments = NULL;
899 }
900
901 public:
902 virtual void iterate( uint64_t fingerprint ) = 0;
903
904 void set_java_argument_object(JavaCallArguments *arguments) { _arguments = arguments; }
905
906 inline void do_bool() { if (!is_return_type()) get_bool(); }
907 inline void do_char() { if (!is_return_type()) get_char(); }
908 inline void do_short() { if (!is_return_type()) get_short(); }
909 inline void do_byte() { if (!is_return_type()) get_byte(); }
910 inline void do_int() { if (!is_return_type()) get_int(); }
911 inline void do_long() { if (!is_return_type()) get_long(); }
912 inline void do_float() { if (!is_return_type()) get_float(); }
913 inline void do_double() { if (!is_return_type()) get_double(); }
914 inline void do_object(int begin, int end) { if (!is_return_type()) get_object(); }
915 inline void do_array(int begin, int end) { if (!is_return_type()) get_object(); } // do_array uses get_object -- there is no get_array
916 inline void do_void() { }
917
918 JavaCallArguments* arguments() { return _arguments; }
919 void push_receiver(Handle h) { _arguments->push_oop(h); }
920 };
921
922
923 class JNI_ArgumentPusherVaArg : public JNI_ArgumentPusher {
924 protected:
925 va_list _ap;
926
927 inline void get_bool() { _arguments->push_int(va_arg(_ap, jint)); } // bool is coerced to int when using va_arg
928 inline void get_char() { _arguments->push_int(va_arg(_ap, jint)); } // char is coerced to int when using va_arg
929 inline void get_short() { _arguments->push_int(va_arg(_ap, jint)); } // short is coerced to int when using va_arg
930 inline void get_byte() { _arguments->push_int(va_arg(_ap, jint)); } // byte is coerced to int when using va_arg
931 inline void get_int() { _arguments->push_int(va_arg(_ap, jint)); }
932
933 // each of these paths is exercized by the various jck Call[Static,Nonvirtual,][Void,Int,..]Method[A,V,] tests
934
935 inline void get_long() { _arguments->push_long(va_arg(_ap, jlong)); }
936 inline void get_float() { _arguments->push_float((jfloat)va_arg(_ap, jdouble)); } // float is coerced to double w/ va_arg
937 inline void get_double() { _arguments->push_double(va_arg(_ap, jdouble)); }
938 inline void get_object() { jobject l = va_arg(_ap, jobject);
939 _arguments->push_oop(Handle((oop *)l, false)); }
940
941 inline void set_ap(va_list rap) {
942 #ifdef va_copy
943 va_copy(_ap, rap);
944 #elif defined (__va_copy)
945 __va_copy(_ap, rap);
946 #else
947 _ap = rap;
948 #endif
949 }
950
951 public:
952 JNI_ArgumentPusherVaArg(Symbol* signature, va_list rap)
953 : JNI_ArgumentPusher(signature) {
954 set_ap(rap);
955 }
956 JNI_ArgumentPusherVaArg(jmethodID method_id, va_list rap)
957 : JNI_ArgumentPusher(Method::resolve_jmethod_id(method_id)->signature()) {
958 set_ap(rap);
959 }
960
961 // Optimized path if we have the bitvector form of signature
962 void iterate( uint64_t fingerprint ) {
963 if (fingerprint == (uint64_t)CONST64(-1)) {
964 SignatureIterator::iterate(); // Must be too many arguments
965 } else {
966 _return_type = (BasicType)((fingerprint >> static_feature_size) &
967 result_feature_mask);
968
969 assert(fingerprint, "Fingerprint should not be 0");
970 fingerprint = fingerprint >> (static_feature_size + result_feature_size);
971 while ( 1 ) {
972 switch ( fingerprint & parameter_feature_mask ) {
973 case bool_parm:
974 case char_parm:
975 case short_parm:
976 case byte_parm:
977 case int_parm:
978 get_int();
979 break;
980 case obj_parm:
981 get_object();
982 break;
983 case long_parm:
984 get_long();
985 break;
986 case float_parm:
987 get_float();
988 break;
989 case double_parm:
990 get_double();
991 break;
992 case done_parm:
993 return;
994 break;
995 default:
996 ShouldNotReachHere();
997 break;
998 }
999 fingerprint >>= parameter_feature_size;
1000 }
1001 }
1002 }
1003 };
1004
1005
1006 class JNI_ArgumentPusherArray : public JNI_ArgumentPusher {
1007 protected:
1008 const jvalue *_ap;
1009
1010 inline void get_bool() { _arguments->push_int((jint)(_ap++)->z); }
1011 inline void get_char() { _arguments->push_int((jint)(_ap++)->c); }
1012 inline void get_short() { _arguments->push_int((jint)(_ap++)->s); }
1013 inline void get_byte() { _arguments->push_int((jint)(_ap++)->b); }
1014 inline void get_int() { _arguments->push_int((jint)(_ap++)->i); }
1015
1016 inline void get_long() { _arguments->push_long((_ap++)->j); }
1017 inline void get_float() { _arguments->push_float((_ap++)->f); }
1018 inline void get_double() { _arguments->push_double((_ap++)->d);}
1019 inline void get_object() { _arguments->push_oop(Handle((oop *)(_ap++)->l, false)); }
1020
1021 inline void set_ap(const jvalue *rap) { _ap = rap; }
1022
1023 public:
1024 JNI_ArgumentPusherArray(Symbol* signature, const jvalue *rap)
1025 : JNI_ArgumentPusher(signature) {
1026 set_ap(rap);
1027 }
1028 JNI_ArgumentPusherArray(jmethodID method_id, const jvalue *rap)
1029 : JNI_ArgumentPusher(Method::resolve_jmethod_id(method_id)->signature()) {
1030 set_ap(rap);
1031 }
1032
1033 // Optimized path if we have the bitvector form of signature
1034 void iterate( uint64_t fingerprint ) {
1035 if (fingerprint == (uint64_t)CONST64(-1)) {
1036 SignatureIterator::iterate(); // Must be too many arguments
1037 } else {
1038 _return_type = (BasicType)((fingerprint >> static_feature_size) &
1039 result_feature_mask);
1040 assert(fingerprint, "Fingerprint should not be 0");
1041 fingerprint = fingerprint >> (static_feature_size + result_feature_size);
1042 while ( 1 ) {
1043 switch ( fingerprint & parameter_feature_mask ) {
1044 case bool_parm:
1045 get_bool();
1046 break;
1047 case char_parm:
1048 get_char();
1049 break;
1050 case short_parm:
1051 get_short();
1052 break;
1053 case byte_parm:
1054 get_byte();
1055 break;
1056 case int_parm:
1057 get_int();
1058 break;
1059 case obj_parm:
1060 get_object();
1061 break;
1062 case long_parm:
1063 get_long();
1064 break;
1065 case float_parm:
1066 get_float();
1067 break;
1068 case double_parm:
1069 get_double();
1070 break;
1071 case done_parm:
1072 return;
1073 break;
1074 default:
1075 ShouldNotReachHere();
1076 break;
1077 }
1078 fingerprint >>= parameter_feature_size;
1079 }
1080 }
1081 }
1082 };
1083
1084
1085 enum JNICallType {
1086 JNI_STATIC,
1087 JNI_VIRTUAL,
1088 JNI_NONVIRTUAL
1089 };
1090
1091
1092
1093 static void jni_invoke_static(JNIEnv *env, JavaValue* result, jobject receiver, JNICallType call_type, jmethodID method_id, JNI_ArgumentPusher *args, TRAPS) {
1094 methodHandle method(THREAD, Method::resolve_jmethod_id(method_id));
1095
1096 // Create object to hold arguments for the JavaCall, and associate it with
1097 // the jni parser
1098 ResourceMark rm(THREAD);
1099 int number_of_parameters = method->size_of_parameters();
1100 JavaCallArguments java_args(number_of_parameters);
1101 args->set_java_argument_object(&java_args);
1102
1103 assert(method->is_static(), "method should be static");
1104
1105 // Fill out JavaCallArguments object
1106 args->iterate( Fingerprinter(method).fingerprint() );
1107 // Initialize result type
1108 result->set_type(args->get_ret_type());
1109
1110 // Invoke the method. Result is returned as oop.
1111 JavaCalls::call(result, method, &java_args, CHECK);
1112
1113 // Convert result
1114 if (result->get_type() == T_OBJECT || result->get_type() == T_ARRAY) {
1115 result->set_jobject(JNIHandles::make_local(env, (oop) result->get_jobject()));
1116 }
1117 }
1118
1119
1120 static void jni_invoke_nonstatic(JNIEnv *env, JavaValue* result, jobject receiver, JNICallType call_type, jmethodID method_id, JNI_ArgumentPusher *args, TRAPS) {
1121 oop recv = JNIHandles::resolve(receiver);
1122 if (recv == NULL) {
1123 THROW(vmSymbols::java_lang_NullPointerException());
1124 }
1125 Handle h_recv(THREAD, recv);
1126
1127 int number_of_parameters;
1128 Method* selected_method;
1129 {
1130 Method* m = Method::resolve_jmethod_id(method_id);
1131 number_of_parameters = m->size_of_parameters();
1132 Klass* holder = m->method_holder();
1133 if (!(holder)->is_interface()) {
1134 // non-interface call -- for that little speed boost, don't handlize
1135 debug_only(No_Safepoint_Verifier nosafepoint;)
1136 if (call_type == JNI_VIRTUAL) {
1137 // jni_GetMethodID makes sure class is linked and initialized
1138 // so m should have a valid vtable index.
1139 assert(!m->has_itable_index(), "");
1140 int vtbl_index = m->vtable_index();
1141 if (vtbl_index != Method::nonvirtual_vtable_index) {
1142 Klass* k = h_recv->klass();
1143 // k might be an arrayKlassOop but all vtables start at
1144 // the same place. The cast is to avoid virtual call and assertion.
1145 InstanceKlass *ik = (InstanceKlass*)k;
1146 selected_method = ik->method_at_vtable(vtbl_index);
1147 } else {
1148 // final method
1149 selected_method = m;
1150 }
1151 } else {
1152 // JNI_NONVIRTUAL call
1153 selected_method = m;
1154 }
1155 } else {
1156 // interface call
1157 KlassHandle h_holder(THREAD, holder);
1158
1159 if (call_type == JNI_VIRTUAL) {
1160 int itbl_index = m->itable_index();
1161 Klass* k = h_recv->klass();
1162 selected_method = InstanceKlass::cast(k)->method_at_itable(h_holder(), itbl_index, CHECK);
1163 } else {
1164 selected_method = m;
1165 }
1166 }
1167 }
1168
1169 methodHandle method(THREAD, selected_method);
1170
1171 // Create object to hold arguments for the JavaCall, and associate it with
1172 // the jni parser
1173 ResourceMark rm(THREAD);
1174 JavaCallArguments java_args(number_of_parameters);
1175 args->set_java_argument_object(&java_args);
1176
1177 // handle arguments
1178 assert(!method->is_static(), "method should not be static");
1179 args->push_receiver(h_recv); // Push jobject handle
1180
1181 // Fill out JavaCallArguments object
1182 args->iterate( Fingerprinter(method).fingerprint() );
1183 // Initialize result type
1184 result->set_type(args->get_ret_type());
1185
1186 // Invoke the method. Result is returned as oop.
1187 JavaCalls::call(result, method, &java_args, CHECK);
1188
1189 // Convert result
1190 if (result->get_type() == T_OBJECT || result->get_type() == T_ARRAY) {
1191 result->set_jobject(JNIHandles::make_local(env, (oop) result->get_jobject()));
1192 }
1193 }
1194
1195
1196 static instanceOop alloc_object(jclass clazz, TRAPS) {
1197 KlassHandle k(THREAD, java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz)));
1198 if (k == NULL) {
1199 ResourceMark rm(THREAD);
1200 THROW_(vmSymbols::java_lang_InstantiationException(), NULL);
1201 }
1202 k()->check_valid_for_instantiation(false, CHECK_NULL);
1203 InstanceKlass::cast(k())->initialize(CHECK_NULL);
1204 instanceOop ih = InstanceKlass::cast(k())->allocate_instance(THREAD);
1205 return ih;
1206 }
1207
1208 DT_RETURN_MARK_DECL(AllocObject, jobject
1209 , HOTSPOT_JNI_ALLOCOBJECT_RETURN(_ret_ref));
1210
1211 JNI_ENTRY(jobject, jni_AllocObject(JNIEnv *env, jclass clazz))
1212 JNIWrapper("AllocObject");
1213
1214 HOTSPOT_JNI_ALLOCOBJECT_ENTRY(env, clazz);
1215
1216 jobject ret = NULL;
1217 DT_RETURN_MARK(AllocObject, jobject, (const jobject&)ret);
1218
1219 instanceOop i = alloc_object(clazz, CHECK_NULL);
1220 ret = JNIHandles::make_local(env, i);
1221 return ret;
1222 JNI_END
1223
1224 DT_RETURN_MARK_DECL(NewObjectA, jobject
1225 , HOTSPOT_JNI_NEWOBJECTA_RETURN(_ret_ref));
1226
1227 JNI_ENTRY(jobject, jni_NewObjectA(JNIEnv *env, jclass clazz, jmethodID methodID, const jvalue *args))
1228 JNIWrapper("NewObjectA");
1229
1230 HOTSPOT_JNI_NEWOBJECTA_ENTRY(env, clazz, (uintptr_t) methodID);
1231
1232 jobject obj = NULL;
1233 DT_RETURN_MARK(NewObjectA, jobject, (const jobject)obj);
1234
1235 instanceOop i = alloc_object(clazz, CHECK_NULL);
1236 obj = JNIHandles::make_local(env, i);
1237 JavaValue jvalue(T_VOID);
1238 JNI_ArgumentPusherArray ap(methodID, args);
1239 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_NULL);
1240 return obj;
1241 JNI_END
1242
1243
1244 DT_RETURN_MARK_DECL(NewObjectV, jobject
1245 , HOTSPOT_JNI_NEWOBJECTV_RETURN(_ret_ref));
1246
1247 JNI_ENTRY(jobject, jni_NewObjectV(JNIEnv *env, jclass clazz, jmethodID methodID, va_list args))
1248 JNIWrapper("NewObjectV");
1249
1250 HOTSPOT_JNI_NEWOBJECTV_ENTRY(env, clazz, (uintptr_t) methodID);
1251
1252 jobject obj = NULL;
1253 DT_RETURN_MARK(NewObjectV, jobject, (const jobject&)obj);
1254
1255 instanceOop i = alloc_object(clazz, CHECK_NULL);
1256 obj = JNIHandles::make_local(env, i);
1257 JavaValue jvalue(T_VOID);
1258 JNI_ArgumentPusherVaArg ap(methodID, args);
1259 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_NULL);
1260 return obj;
1261 JNI_END
1262
1263
1264 DT_RETURN_MARK_DECL(NewObject, jobject
1265 , HOTSPOT_JNI_NEWOBJECT_RETURN(_ret_ref));
1266
1267 JNI_ENTRY(jobject, jni_NewObject(JNIEnv *env, jclass clazz, jmethodID methodID, ...))
1268 JNIWrapper("NewObject");
1269
1270 HOTSPOT_JNI_NEWOBJECT_ENTRY(env, clazz, (uintptr_t) methodID);
1271
1272 jobject obj = NULL;
1273 DT_RETURN_MARK(NewObject, jobject, (const jobject&)obj);
1274
1275 instanceOop i = alloc_object(clazz, CHECK_NULL);
1276 obj = JNIHandles::make_local(env, i);
1277 va_list args;
1278 va_start(args, methodID);
1279 JavaValue jvalue(T_VOID);
1280 JNI_ArgumentPusherVaArg ap(methodID, args);
1281 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_NULL);
1282 va_end(args);
1283 return obj;
1284 JNI_END
1285
1286
1287 JNI_ENTRY(jclass, jni_GetObjectClass(JNIEnv *env, jobject obj))
1288 JNIWrapper("GetObjectClass");
1289
1290 HOTSPOT_JNI_GETOBJECTCLASS_ENTRY(env, obj);
1291
1292 Klass* k = JNIHandles::resolve_non_null(obj)->klass();
1293 jclass ret =
1294 (jclass) JNIHandles::make_local(env, k->java_mirror());
1295
1296 HOTSPOT_JNI_GETOBJECTCLASS_RETURN(ret);
1297 return ret;
1298 JNI_END
1299
1300 JNI_QUICK_ENTRY(jboolean, jni_IsInstanceOf(JNIEnv *env, jobject obj, jclass clazz))
1301 JNIWrapper("IsInstanceOf");
1302
1303 HOTSPOT_JNI_ISINSTANCEOF_ENTRY(env, obj, clazz);
1304
1305 jboolean ret = JNI_TRUE;
1306 if (obj != NULL) {
1307 ret = JNI_FALSE;
1308 Klass* k = java_lang_Class::as_Klass(
1309 JNIHandles::resolve_non_null(clazz));
1310 if (k != NULL) {
1311 ret = JNIHandles::resolve_non_null(obj)->is_a(k) ? JNI_TRUE : JNI_FALSE;
1312 }
1313 }
1314
1315 HOTSPOT_JNI_ISINSTANCEOF_RETURN(ret);
1316 return ret;
1317 JNI_END
1318
1319
1320 static jmethodID get_method_id(JNIEnv *env, jclass clazz, const char *name_str,
1321 const char *sig, bool is_static, TRAPS) {
1322 // %%%% This code should probably just call into a method in the LinkResolver
1323 //
1324 // The class should have been loaded (we have an instance of the class
1325 // passed in) so the method and signature should already be in the symbol
1326 // table. If they're not there, the method doesn't exist.
1327 const char *name_to_probe = (name_str == NULL)
1328 ? vmSymbols::object_initializer_name()->as_C_string()
1329 : name_str;
1330 TempNewSymbol name = SymbolTable::probe(name_to_probe, (int)strlen(name_to_probe));
1331 TempNewSymbol signature = SymbolTable::probe(sig, (int)strlen(sig));
1332
1333 if (name == NULL || signature == NULL) {
1334 THROW_MSG_0(vmSymbols::java_lang_NoSuchMethodError(), name_str);
1335 }
1336
1337 // Throw a NoSuchMethodError exception if we have an instance of a
1338 // primitive java.lang.Class
1339 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(clazz))) {
1340 THROW_MSG_0(vmSymbols::java_lang_NoSuchMethodError(), name_str);
1341 }
1342
1343 KlassHandle klass(THREAD,
1344 java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz)));
1345
1346 // Make sure class is linked and initialized before handing id's out to
1347 // Method*s.
1348 klass()->initialize(CHECK_NULL);
1349
1350 Method* m;
1351 if (name == vmSymbols::object_initializer_name() ||
1352 name == vmSymbols::class_initializer_name()) {
1353 // Never search superclasses for constructors
1354 if (klass->oop_is_instance()) {
1355 m = InstanceKlass::cast(klass())->find_method(name, signature);
1356 } else {
1357 m = NULL;
1358 }
1359 } else {
1360 m = klass->lookup_method(name, signature);
1361 if (m == NULL && klass->oop_is_instance()) {
1362 m = InstanceKlass::cast(klass())->lookup_method_in_ordered_interfaces(name, signature);
1363 }
1364 }
1365 if (m == NULL || (m->is_static() != is_static)) {
1366 THROW_MSG_0(vmSymbols::java_lang_NoSuchMethodError(), name_str);
1367 }
1368 return m->jmethod_id();
1369 }
1370
1371
1372 JNI_ENTRY(jmethodID, jni_GetMethodID(JNIEnv *env, jclass clazz,
1373 const char *name, const char *sig))
1374 JNIWrapper("GetMethodID");
1375 HOTSPOT_JNI_GETMETHODID_ENTRY(env, clazz, (char *) name, (char *) sig);
1376 jmethodID ret = get_method_id(env, clazz, name, sig, false, thread);
1377 HOTSPOT_JNI_GETMETHODID_RETURN((uintptr_t) ret);
1378 return ret;
1379 JNI_END
1380
1381
1382 JNI_ENTRY(jmethodID, jni_GetStaticMethodID(JNIEnv *env, jclass clazz,
1383 const char *name, const char *sig))
1384 JNIWrapper("GetStaticMethodID");
1385 HOTSPOT_JNI_GETSTATICMETHODID_ENTRY(env, (char *) clazz, (char *) name, (char *)sig);
1386 jmethodID ret = get_method_id(env, clazz, name, sig, true, thread);
1387 HOTSPOT_JNI_GETSTATICMETHODID_RETURN((uintptr_t) ret);
1388 return ret;
1389 JNI_END
1390
1391
1392
1393 //
1394 // Calling Methods
1395 //
1396
1397
1398 #define DEFINE_CALLMETHOD(ResultType, Result, Tag \
1399 , EntryProbe, ReturnProbe) \
1400 \
1401 DT_RETURN_MARK_DECL_FOR(Result, Call##Result##Method, ResultType \
1402 , ReturnProbe); \
1403 \
1404 JNI_ENTRY(ResultType, \
1405 jni_Call##Result##Method(JNIEnv *env, jobject obj, jmethodID methodID, ...)) \
1406 JNIWrapper("Call" XSTR(Result) "Method"); \
1407 \
1408 EntryProbe; \
1409 ResultType ret = 0;\
1410 DT_RETURN_MARK_FOR(Result, Call##Result##Method, ResultType, \
1411 (const ResultType&)ret);\
1412 \
1413 va_list args; \
1414 va_start(args, methodID); \
1415 JavaValue jvalue(Tag); \
1416 JNI_ArgumentPusherVaArg ap(methodID, args); \
1417 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK_0); \
1418 va_end(args); \
1419 ret = jvalue.get_##ResultType(); \
1420 return ret;\
1421 JNI_END
1422
1423 // the runtime type of subword integral basic types is integer
1424 DEFINE_CALLMETHOD(jboolean, Boolean, T_BOOLEAN
1425 , HOTSPOT_JNI_CALLBOOLEANMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1426 HOTSPOT_JNI_CALLBOOLEANMETHOD_RETURN(_ret_ref))
1427 DEFINE_CALLMETHOD(jbyte, Byte, T_BYTE
1428 , HOTSPOT_JNI_CALLBYTEMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1429 HOTSPOT_JNI_CALLBYTEMETHOD_RETURN(_ret_ref))
1430 DEFINE_CALLMETHOD(jchar, Char, T_CHAR
1431 , HOTSPOT_JNI_CALLCHARMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1432 HOTSPOT_JNI_CALLCHARMETHOD_RETURN(_ret_ref))
1433 DEFINE_CALLMETHOD(jshort, Short, T_SHORT
1434 , HOTSPOT_JNI_CALLSHORTMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1435 HOTSPOT_JNI_CALLSHORTMETHOD_RETURN(_ret_ref))
1436
1437 DEFINE_CALLMETHOD(jobject, Object, T_OBJECT
1438 , HOTSPOT_JNI_CALLOBJECTMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1439 HOTSPOT_JNI_CALLOBJECTMETHOD_RETURN(_ret_ref))
1440 DEFINE_CALLMETHOD(jint, Int, T_INT,
1441 HOTSPOT_JNI_CALLINTMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1442 HOTSPOT_JNI_CALLINTMETHOD_RETURN(_ret_ref))
1443 DEFINE_CALLMETHOD(jlong, Long, T_LONG
1444 , HOTSPOT_JNI_CALLLONGMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1445 HOTSPOT_JNI_CALLLONGMETHOD_RETURN(_ret_ref))
1446 // Float and double probes don't return value because dtrace doesn't currently support it
1447 DEFINE_CALLMETHOD(jfloat, Float, T_FLOAT
1448 , HOTSPOT_JNI_CALLFLOATMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1449 HOTSPOT_JNI_CALLFLOATMETHOD_RETURN())
1450 DEFINE_CALLMETHOD(jdouble, Double, T_DOUBLE
1451 , HOTSPOT_JNI_CALLDOUBLEMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1452 HOTSPOT_JNI_CALLDOUBLEMETHOD_RETURN())
1453
1454 #define DEFINE_CALLMETHODV(ResultType, Result, Tag \
1455 , EntryProbe, ReturnProbe) \
1456 \
1457 DT_RETURN_MARK_DECL_FOR(Result, Call##Result##MethodV, ResultType \
1458 , ReturnProbe); \
1459 \
1460 JNI_ENTRY(ResultType, \
1461 jni_Call##Result##MethodV(JNIEnv *env, jobject obj, jmethodID methodID, va_list args)) \
1462 JNIWrapper("Call" XSTR(Result) "MethodV"); \
1463 \
1464 EntryProbe;\
1465 ResultType ret = 0;\
1466 DT_RETURN_MARK_FOR(Result, Call##Result##MethodV, ResultType, \
1467 (const ResultType&)ret);\
1468 \
1469 JavaValue jvalue(Tag); \
1470 JNI_ArgumentPusherVaArg ap(methodID, args); \
1471 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK_0); \
1472 ret = jvalue.get_##ResultType(); \
1473 return ret;\
1474 JNI_END
1475
1476 // the runtime type of subword integral basic types is integer
1477 DEFINE_CALLMETHODV(jboolean, Boolean, T_BOOLEAN
1478 , HOTSPOT_JNI_CALLBOOLEANMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1479 HOTSPOT_JNI_CALLBOOLEANMETHODV_RETURN(_ret_ref))
1480 DEFINE_CALLMETHODV(jbyte, Byte, T_BYTE
1481 , HOTSPOT_JNI_CALLBYTEMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1482 HOTSPOT_JNI_CALLBYTEMETHODV_RETURN(_ret_ref))
1483 DEFINE_CALLMETHODV(jchar, Char, T_CHAR
1484 , HOTSPOT_JNI_CALLCHARMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1485 HOTSPOT_JNI_CALLCHARMETHODV_RETURN(_ret_ref))
1486 DEFINE_CALLMETHODV(jshort, Short, T_SHORT
1487 , HOTSPOT_JNI_CALLSHORTMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1488 HOTSPOT_JNI_CALLSHORTMETHODV_RETURN(_ret_ref))
1489
1490 DEFINE_CALLMETHODV(jobject, Object, T_OBJECT
1491 , HOTSPOT_JNI_CALLOBJECTMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1492 HOTSPOT_JNI_CALLOBJECTMETHODV_RETURN(_ret_ref))
1493 DEFINE_CALLMETHODV(jint, Int, T_INT,
1494 HOTSPOT_JNI_CALLINTMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1495 HOTSPOT_JNI_CALLINTMETHODV_RETURN(_ret_ref))
1496 DEFINE_CALLMETHODV(jlong, Long, T_LONG
1497 , HOTSPOT_JNI_CALLLONGMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1498 HOTSPOT_JNI_CALLLONGMETHODV_RETURN(_ret_ref))
1499 // Float and double probes don't return value because dtrace doesn't currently support it
1500 DEFINE_CALLMETHODV(jfloat, Float, T_FLOAT
1501 , HOTSPOT_JNI_CALLFLOATMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1502 HOTSPOT_JNI_CALLFLOATMETHODV_RETURN())
1503 DEFINE_CALLMETHODV(jdouble, Double, T_DOUBLE
1504 , HOTSPOT_JNI_CALLDOUBLEMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1505 HOTSPOT_JNI_CALLDOUBLEMETHODV_RETURN())
1506
1507 #define DEFINE_CALLMETHODA(ResultType, Result, Tag \
1508 , EntryProbe, ReturnProbe) \
1509 \
1510 DT_RETURN_MARK_DECL_FOR(Result, Call##Result##MethodA, ResultType \
1511 , ReturnProbe); \
1512 \
1513 JNI_ENTRY(ResultType, \
1514 jni_Call##Result##MethodA(JNIEnv *env, jobject obj, jmethodID methodID, const jvalue *args)) \
1515 JNIWrapper("Call" XSTR(Result) "MethodA"); \
1516 EntryProbe; \
1517 ResultType ret = 0;\
1518 DT_RETURN_MARK_FOR(Result, Call##Result##MethodA, ResultType, \
1519 (const ResultType&)ret);\
1520 \
1521 JavaValue jvalue(Tag); \
1522 JNI_ArgumentPusherArray ap(methodID, args); \
1523 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK_0); \
1524 ret = jvalue.get_##ResultType(); \
1525 return ret;\
1526 JNI_END
1527
1528 // the runtime type of subword integral basic types is integer
1529 DEFINE_CALLMETHODA(jboolean, Boolean, T_BOOLEAN
1530 , HOTSPOT_JNI_CALLBOOLEANMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1531 HOTSPOT_JNI_CALLBOOLEANMETHODA_RETURN(_ret_ref))
1532 DEFINE_CALLMETHODA(jbyte, Byte, T_BYTE
1533 , HOTSPOT_JNI_CALLBYTEMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1534 HOTSPOT_JNI_CALLBYTEMETHODA_RETURN(_ret_ref))
1535 DEFINE_CALLMETHODA(jchar, Char, T_CHAR
1536 , HOTSPOT_JNI_CALLCHARMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1537 HOTSPOT_JNI_CALLCHARMETHODA_RETURN(_ret_ref))
1538 DEFINE_CALLMETHODA(jshort, Short, T_SHORT
1539 , HOTSPOT_JNI_CALLSHORTMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1540 HOTSPOT_JNI_CALLSHORTMETHODA_RETURN(_ret_ref))
1541
1542 DEFINE_CALLMETHODA(jobject, Object, T_OBJECT
1543 , HOTSPOT_JNI_CALLOBJECTMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1544 HOTSPOT_JNI_CALLOBJECTMETHODA_RETURN(_ret_ref))
1545 DEFINE_CALLMETHODA(jint, Int, T_INT,
1546 HOTSPOT_JNI_CALLINTMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1547 HOTSPOT_JNI_CALLINTMETHODA_RETURN(_ret_ref))
1548 DEFINE_CALLMETHODA(jlong, Long, T_LONG
1549 , HOTSPOT_JNI_CALLLONGMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1550 HOTSPOT_JNI_CALLLONGMETHODA_RETURN(_ret_ref))
1551 // Float and double probes don't return value because dtrace doesn't currently support it
1552 DEFINE_CALLMETHODA(jfloat, Float, T_FLOAT
1553 , HOTSPOT_JNI_CALLFLOATMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1554 HOTSPOT_JNI_CALLFLOATMETHODA_RETURN())
1555 DEFINE_CALLMETHODA(jdouble, Double, T_DOUBLE
1556 , HOTSPOT_JNI_CALLDOUBLEMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1557 HOTSPOT_JNI_CALLDOUBLEMETHODA_RETURN())
1558
1559 DT_VOID_RETURN_MARK_DECL(CallVoidMethod, HOTSPOT_JNI_CALLVOIDMETHOD_RETURN());
1560 DT_VOID_RETURN_MARK_DECL(CallVoidMethodV, HOTSPOT_JNI_CALLVOIDMETHODV_RETURN());
1561 DT_VOID_RETURN_MARK_DECL(CallVoidMethodA, HOTSPOT_JNI_CALLVOIDMETHODA_RETURN());
1562
1563
1564 JNI_ENTRY(void, jni_CallVoidMethod(JNIEnv *env, jobject obj, jmethodID methodID, ...))
1565 JNIWrapper("CallVoidMethod");
1566 HOTSPOT_JNI_CALLVOIDMETHOD_ENTRY(env, obj, (uintptr_t) methodID);
1567 DT_VOID_RETURN_MARK(CallVoidMethod);
1568
1569 va_list args;
1570 va_start(args, methodID);
1571 JavaValue jvalue(T_VOID);
1572 JNI_ArgumentPusherVaArg ap(methodID, args);
1573 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK);
1574 va_end(args);
1575 JNI_END
1576
1577
1578 JNI_ENTRY(void, jni_CallVoidMethodV(JNIEnv *env, jobject obj, jmethodID methodID, va_list args))
1579 JNIWrapper("CallVoidMethodV");
1580 HOTSPOT_JNI_CALLVOIDMETHODV_ENTRY(env, obj, (uintptr_t) methodID);
1581 DT_VOID_RETURN_MARK(CallVoidMethodV);
1582
1583 JavaValue jvalue(T_VOID);
1584 JNI_ArgumentPusherVaArg ap(methodID, args);
1585 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK);
1586 JNI_END
1587
1588
1589 JNI_ENTRY(void, jni_CallVoidMethodA(JNIEnv *env, jobject obj, jmethodID methodID, const jvalue *args))
1590 JNIWrapper("CallVoidMethodA");
1591 HOTSPOT_JNI_CALLVOIDMETHODA_ENTRY(env, obj, (uintptr_t) methodID);
1592 DT_VOID_RETURN_MARK(CallVoidMethodA);
1593
1594 JavaValue jvalue(T_VOID);
1595 JNI_ArgumentPusherArray ap(methodID, args);
1596 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK);
1597 JNI_END
1598
1599
1600
1601 #define DEFINE_CALLNONVIRTUALMETHOD(ResultType, Result, Tag \
1602 , EntryProbe, ReturnProbe) \
1603 \
1604 DT_RETURN_MARK_DECL_FOR(Result, CallNonvirtual##Result##Method, ResultType \
1605 , ReturnProbe);\
1606 \
1607 JNI_ENTRY(ResultType, \
1608 jni_CallNonvirtual##Result##Method(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, ...)) \
1609 JNIWrapper("CallNonvitual" XSTR(Result) "Method"); \
1610 \
1611 EntryProbe;\
1612 ResultType ret;\
1613 DT_RETURN_MARK_FOR(Result, CallNonvirtual##Result##Method, ResultType, \
1614 (const ResultType&)ret);\
1615 \
1616 va_list args; \
1617 va_start(args, methodID); \
1618 JavaValue jvalue(Tag); \
1619 JNI_ArgumentPusherVaArg ap(methodID, args); \
1620 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_0); \
1621 va_end(args); \
1622 ret = jvalue.get_##ResultType(); \
1623 return ret;\
1624 JNI_END
1625
1626 // the runtime type of subword integral basic types is integer
1627 DEFINE_CALLNONVIRTUALMETHOD(jboolean, Boolean, T_BOOLEAN
1628 , HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1629 HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHOD_RETURN(_ret_ref))
1630 DEFINE_CALLNONVIRTUALMETHOD(jbyte, Byte, T_BYTE
1631 , HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1632 HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHOD_RETURN(_ret_ref))
1633 DEFINE_CALLNONVIRTUALMETHOD(jchar, Char, T_CHAR
1634 , HOTSPOT_JNI_CALLNONVIRTUALCHARMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1635 HOTSPOT_JNI_CALLNONVIRTUALCHARMETHOD_RETURN(_ret_ref))
1636 DEFINE_CALLNONVIRTUALMETHOD(jshort, Short, T_SHORT
1637 , HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1638 HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHOD_RETURN(_ret_ref))
1639
1640 DEFINE_CALLNONVIRTUALMETHOD(jobject, Object, T_OBJECT
1641 , HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1642 HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHOD_RETURN(_ret_ref))
1643 DEFINE_CALLNONVIRTUALMETHOD(jint, Int, T_INT
1644 , HOTSPOT_JNI_CALLNONVIRTUALINTMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1645 HOTSPOT_JNI_CALLNONVIRTUALINTMETHOD_RETURN(_ret_ref))
1646 DEFINE_CALLNONVIRTUALMETHOD(jlong, Long, T_LONG
1647 , HOTSPOT_JNI_CALLNONVIRTUALLONGMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1648 // Float and double probes don't return value because dtrace doesn't currently support it
1649 HOTSPOT_JNI_CALLNONVIRTUALLONGMETHOD_RETURN(_ret_ref))
1650 DEFINE_CALLNONVIRTUALMETHOD(jfloat, Float, T_FLOAT
1651 , HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1652 HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHOD_RETURN())
1653 DEFINE_CALLNONVIRTUALMETHOD(jdouble, Double, T_DOUBLE
1654 , HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1655 HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHOD_RETURN())
1656
1657 #define DEFINE_CALLNONVIRTUALMETHODV(ResultType, Result, Tag \
1658 , EntryProbe, ReturnProbe) \
1659 \
1660 DT_RETURN_MARK_DECL_FOR(Result, CallNonvirtual##Result##MethodV, ResultType \
1661 , ReturnProbe);\
1662 \
1663 JNI_ENTRY(ResultType, \
1664 jni_CallNonvirtual##Result##MethodV(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, va_list args)) \
1665 JNIWrapper("CallNonvitual" XSTR(Result) "MethodV"); \
1666 \
1667 EntryProbe;\
1668 ResultType ret;\
1669 DT_RETURN_MARK_FOR(Result, CallNonvirtual##Result##MethodV, ResultType, \
1670 (const ResultType&)ret);\
1671 \
1672 JavaValue jvalue(Tag); \
1673 JNI_ArgumentPusherVaArg ap(methodID, args); \
1674 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_0); \
1675 ret = jvalue.get_##ResultType(); \
1676 return ret;\
1677 JNI_END
1678
1679 // the runtime type of subword integral basic types is integer
1680 DEFINE_CALLNONVIRTUALMETHODV(jboolean, Boolean, T_BOOLEAN
1681 , HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1682 HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHODV_RETURN(_ret_ref))
1683 DEFINE_CALLNONVIRTUALMETHODV(jbyte, Byte, T_BYTE
1684 , HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1685 HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHODV_RETURN(_ret_ref))
1686 DEFINE_CALLNONVIRTUALMETHODV(jchar, Char, T_CHAR
1687 , HOTSPOT_JNI_CALLNONVIRTUALCHARMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1688 HOTSPOT_JNI_CALLNONVIRTUALCHARMETHODV_RETURN(_ret_ref))
1689 DEFINE_CALLNONVIRTUALMETHODV(jshort, Short, T_SHORT
1690 , HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1691 HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHODV_RETURN(_ret_ref))
1692
1693 DEFINE_CALLNONVIRTUALMETHODV(jobject, Object, T_OBJECT
1694 , HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1695 HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHODV_RETURN(_ret_ref))
1696 DEFINE_CALLNONVIRTUALMETHODV(jint, Int, T_INT
1697 , HOTSPOT_JNI_CALLNONVIRTUALINTMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1698 HOTSPOT_JNI_CALLNONVIRTUALINTMETHODV_RETURN(_ret_ref))
1699 DEFINE_CALLNONVIRTUALMETHODV(jlong, Long, T_LONG
1700 , HOTSPOT_JNI_CALLNONVIRTUALLONGMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1701 // Float and double probes don't return value because dtrace doesn't currently support it
1702 HOTSPOT_JNI_CALLNONVIRTUALLONGMETHODV_RETURN(_ret_ref))
1703 DEFINE_CALLNONVIRTUALMETHODV(jfloat, Float, T_FLOAT
1704 , HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1705 HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHODV_RETURN())
1706 DEFINE_CALLNONVIRTUALMETHODV(jdouble, Double, T_DOUBLE
1707 , HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1708 HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHODV_RETURN())
1709
1710 #define DEFINE_CALLNONVIRTUALMETHODA(ResultType, Result, Tag \
1711 , EntryProbe, ReturnProbe) \
1712 \
1713 DT_RETURN_MARK_DECL_FOR(Result, CallNonvirtual##Result##MethodA, ResultType \
1714 , ReturnProbe);\
1715 \
1716 JNI_ENTRY(ResultType, \
1717 jni_CallNonvirtual##Result##MethodA(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, const jvalue *args)) \
1718 JNIWrapper("CallNonvitual" XSTR(Result) "MethodA"); \
1719 \
1720 EntryProbe;\
1721 ResultType ret;\
1722 DT_RETURN_MARK_FOR(Result, CallNonvirtual##Result##MethodA, ResultType, \
1723 (const ResultType&)ret);\
1724 \
1725 JavaValue jvalue(Tag); \
1726 JNI_ArgumentPusherArray ap(methodID, args); \
1727 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_0); \
1728 ret = jvalue.get_##ResultType(); \
1729 return ret;\
1730 JNI_END
1731
1732 // the runtime type of subword integral basic types is integer
1733 DEFINE_CALLNONVIRTUALMETHODA(jboolean, Boolean, T_BOOLEAN
1734 , HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1735 HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHODA_RETURN(_ret_ref))
1736 DEFINE_CALLNONVIRTUALMETHODA(jbyte, Byte, T_BYTE
1737 , HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1738 HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHODA_RETURN(_ret_ref))
1739 DEFINE_CALLNONVIRTUALMETHODA(jchar, Char, T_CHAR
1740 , HOTSPOT_JNI_CALLNONVIRTUALCHARMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1741 HOTSPOT_JNI_CALLNONVIRTUALCHARMETHODA_RETURN(_ret_ref))
1742 DEFINE_CALLNONVIRTUALMETHODA(jshort, Short, T_SHORT
1743 , HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1744 HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHODA_RETURN(_ret_ref))
1745
1746 DEFINE_CALLNONVIRTUALMETHODA(jobject, Object, T_OBJECT
1747 , HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1748 HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHODA_RETURN(_ret_ref))
1749 DEFINE_CALLNONVIRTUALMETHODA(jint, Int, T_INT
1750 , HOTSPOT_JNI_CALLNONVIRTUALINTMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1751 HOTSPOT_JNI_CALLNONVIRTUALINTMETHODA_RETURN(_ret_ref))
1752 DEFINE_CALLNONVIRTUALMETHODA(jlong, Long, T_LONG
1753 , HOTSPOT_JNI_CALLNONVIRTUALLONGMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1754 // Float and double probes don't return value because dtrace doesn't currently support it
1755 HOTSPOT_JNI_CALLNONVIRTUALLONGMETHODA_RETURN(_ret_ref))
1756 DEFINE_CALLNONVIRTUALMETHODA(jfloat, Float, T_FLOAT
1757 , HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1758 HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHODA_RETURN())
1759 DEFINE_CALLNONVIRTUALMETHODA(jdouble, Double, T_DOUBLE
1760 , HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1761 HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHODA_RETURN())
1762
1763 DT_VOID_RETURN_MARK_DECL(CallNonvirtualVoidMethod
1764 , HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHOD_RETURN());
1765 DT_VOID_RETURN_MARK_DECL(CallNonvirtualVoidMethodV
1766 , HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHODV_RETURN());
1767 DT_VOID_RETURN_MARK_DECL(CallNonvirtualVoidMethodA
1768 , HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHODA_RETURN());
1769
1770 JNI_ENTRY(void, jni_CallNonvirtualVoidMethod(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, ...))
1771 JNIWrapper("CallNonvirtualVoidMethod");
1772
1773 HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHOD_ENTRY(env, obj, cls, (uintptr_t) methodID);
1774 DT_VOID_RETURN_MARK(CallNonvirtualVoidMethod);
1775
1776 va_list args;
1777 va_start(args, methodID);
1778 JavaValue jvalue(T_VOID);
1779 JNI_ArgumentPusherVaArg ap(methodID, args);
1780 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK);
1781 va_end(args);
1782 JNI_END
1783
1784
1785 JNI_ENTRY(void, jni_CallNonvirtualVoidMethodV(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, va_list args))
1786 JNIWrapper("CallNonvirtualVoidMethodV");
1787
1788 HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHODV_ENTRY(
1789 env, obj, cls, (uintptr_t) methodID);
1790 DT_VOID_RETURN_MARK(CallNonvirtualVoidMethodV);
1791
1792 JavaValue jvalue(T_VOID);
1793 JNI_ArgumentPusherVaArg ap(methodID, args);
1794 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK);
1795 JNI_END
1796
1797
1798 JNI_ENTRY(void, jni_CallNonvirtualVoidMethodA(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, const jvalue *args))
1799 JNIWrapper("CallNonvirtualVoidMethodA");
1800 HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHODA_ENTRY(
1801 env, obj, cls, (uintptr_t) methodID);
1802 DT_VOID_RETURN_MARK(CallNonvirtualVoidMethodA);
1803 JavaValue jvalue(T_VOID);
1804 JNI_ArgumentPusherArray ap(methodID, args);
1805 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK);
1806 JNI_END
1807
1808
1809
1810 #define DEFINE_CALLSTATICMETHOD(ResultType, Result, Tag \
1811 , EntryProbe, ResultProbe) \
1812 \
1813 DT_RETURN_MARK_DECL_FOR(Result, CallStatic##Result##Method, ResultType \
1814 , ResultProbe); \
1815 \
1816 JNI_ENTRY(ResultType, \
1817 jni_CallStatic##Result##Method(JNIEnv *env, jclass cls, jmethodID methodID, ...)) \
1818 JNIWrapper("CallStatic" XSTR(Result) "Method"); \
1819 \
1820 EntryProbe; \
1821 ResultType ret = 0;\
1822 DT_RETURN_MARK_FOR(Result, CallStatic##Result##Method, ResultType, \
1823 (const ResultType&)ret);\
1824 \
1825 va_list args; \
1826 va_start(args, methodID); \
1827 JavaValue jvalue(Tag); \
1828 JNI_ArgumentPusherVaArg ap(methodID, args); \
1829 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK_0); \
1830 va_end(args); \
1831 ret = jvalue.get_##ResultType(); \
1832 return ret;\
1833 JNI_END
1834
1835 // the runtime type of subword integral basic types is integer
1836 DEFINE_CALLSTATICMETHOD(jboolean, Boolean, T_BOOLEAN
1837 , HOTSPOT_JNI_CALLSTATICBOOLEANMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1838 HOTSPOT_JNI_CALLSTATICBOOLEANMETHOD_RETURN(_ret_ref));
1839 DEFINE_CALLSTATICMETHOD(jbyte, Byte, T_BYTE
1840 , HOTSPOT_JNI_CALLSTATICBYTEMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1841 HOTSPOT_JNI_CALLSTATICBYTEMETHOD_RETURN(_ret_ref));
1842 DEFINE_CALLSTATICMETHOD(jchar, Char, T_CHAR
1843 , HOTSPOT_JNI_CALLSTATICCHARMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1844 HOTSPOT_JNI_CALLSTATICCHARMETHOD_RETURN(_ret_ref));
1845 DEFINE_CALLSTATICMETHOD(jshort, Short, T_SHORT
1846 , HOTSPOT_JNI_CALLSTATICSHORTMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1847 HOTSPOT_JNI_CALLSTATICSHORTMETHOD_RETURN(_ret_ref));
1848
1849 DEFINE_CALLSTATICMETHOD(jobject, Object, T_OBJECT
1850 , HOTSPOT_JNI_CALLSTATICOBJECTMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1851 HOTSPOT_JNI_CALLSTATICOBJECTMETHOD_RETURN(_ret_ref));
1852 DEFINE_CALLSTATICMETHOD(jint, Int, T_INT
1853 , HOTSPOT_JNI_CALLSTATICINTMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1854 HOTSPOT_JNI_CALLSTATICINTMETHOD_RETURN(_ret_ref));
1855 DEFINE_CALLSTATICMETHOD(jlong, Long, T_LONG
1856 , HOTSPOT_JNI_CALLSTATICLONGMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1857 HOTSPOT_JNI_CALLSTATICLONGMETHOD_RETURN(_ret_ref));
1858 // Float and double probes don't return value because dtrace doesn't currently support it
1859 DEFINE_CALLSTATICMETHOD(jfloat, Float, T_FLOAT
1860 , HOTSPOT_JNI_CALLSTATICFLOATMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1861 HOTSPOT_JNI_CALLSTATICFLOATMETHOD_RETURN());
1862 DEFINE_CALLSTATICMETHOD(jdouble, Double, T_DOUBLE
1863 , HOTSPOT_JNI_CALLSTATICDOUBLEMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1864 HOTSPOT_JNI_CALLSTATICDOUBLEMETHOD_RETURN());
1865
1866 #define DEFINE_CALLSTATICMETHODV(ResultType, Result, Tag \
1867 , EntryProbe, ResultProbe) \
1868 \
1869 DT_RETURN_MARK_DECL_FOR(Result, CallStatic##Result##MethodV, ResultType \
1870 , ResultProbe); \
1871 \
1872 JNI_ENTRY(ResultType, \
1873 jni_CallStatic##Result##MethodV(JNIEnv *env, jclass cls, jmethodID methodID, va_list args)) \
1874 JNIWrapper("CallStatic" XSTR(Result) "MethodV"); \
1875 \
1876 EntryProbe; \
1877 ResultType ret = 0;\
1878 DT_RETURN_MARK_FOR(Result, CallStatic##Result##MethodV, ResultType, \
1879 (const ResultType&)ret);\
1880 \
1881 JavaValue jvalue(Tag); \
1882 JNI_ArgumentPusherVaArg ap(methodID, args); \
1883 /* Make sure class is initialized before trying to invoke its method */ \
1884 KlassHandle k(THREAD, java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls))); \
1885 k()->initialize(CHECK_0); \
1886 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK_0); \
1887 va_end(args); \
1888 ret = jvalue.get_##ResultType(); \
1889 return ret;\
1890 JNI_END
1891
1892 // the runtime type of subword integral basic types is integer
1893 DEFINE_CALLSTATICMETHODV(jboolean, Boolean, T_BOOLEAN
1894 , HOTSPOT_JNI_CALLSTATICBOOLEANMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1895 HOTSPOT_JNI_CALLSTATICBOOLEANMETHODV_RETURN(_ret_ref));
1896 DEFINE_CALLSTATICMETHODV(jbyte, Byte, T_BYTE
1897 , HOTSPOT_JNI_CALLSTATICBYTEMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1898 HOTSPOT_JNI_CALLSTATICBYTEMETHODV_RETURN(_ret_ref));
1899 DEFINE_CALLSTATICMETHODV(jchar, Char, T_CHAR
1900 , HOTSPOT_JNI_CALLSTATICCHARMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1901 HOTSPOT_JNI_CALLSTATICCHARMETHODV_RETURN(_ret_ref));
1902 DEFINE_CALLSTATICMETHODV(jshort, Short, T_SHORT
1903 , HOTSPOT_JNI_CALLSTATICSHORTMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1904 HOTSPOT_JNI_CALLSTATICSHORTMETHODV_RETURN(_ret_ref));
1905
1906 DEFINE_CALLSTATICMETHODV(jobject, Object, T_OBJECT
1907 , HOTSPOT_JNI_CALLSTATICOBJECTMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1908 HOTSPOT_JNI_CALLSTATICOBJECTMETHODV_RETURN(_ret_ref));
1909 DEFINE_CALLSTATICMETHODV(jint, Int, T_INT
1910 , HOTSPOT_JNI_CALLSTATICINTMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1911 HOTSPOT_JNI_CALLSTATICINTMETHODV_RETURN(_ret_ref));
1912 DEFINE_CALLSTATICMETHODV(jlong, Long, T_LONG
1913 , HOTSPOT_JNI_CALLSTATICLONGMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1914 HOTSPOT_JNI_CALLSTATICLONGMETHODV_RETURN(_ret_ref));
1915 // Float and double probes don't return value because dtrace doesn't currently support it
1916 DEFINE_CALLSTATICMETHODV(jfloat, Float, T_FLOAT
1917 , HOTSPOT_JNI_CALLSTATICFLOATMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1918 HOTSPOT_JNI_CALLSTATICFLOATMETHODV_RETURN());
1919 DEFINE_CALLSTATICMETHODV(jdouble, Double, T_DOUBLE
1920 , HOTSPOT_JNI_CALLSTATICDOUBLEMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1921 HOTSPOT_JNI_CALLSTATICDOUBLEMETHODV_RETURN());
1922
1923 #define DEFINE_CALLSTATICMETHODA(ResultType, Result, Tag \
1924 , EntryProbe, ResultProbe) \
1925 \
1926 DT_RETURN_MARK_DECL_FOR(Result, CallStatic##Result##MethodA, ResultType \
1927 , ResultProbe); \
1928 \
1929 JNI_ENTRY(ResultType, \
1930 jni_CallStatic##Result##MethodA(JNIEnv *env, jclass cls, jmethodID methodID, const jvalue *args)) \
1931 JNIWrapper("CallStatic" XSTR(Result) "MethodA"); \
1932 \
1933 EntryProbe; \
1934 ResultType ret = 0;\
1935 DT_RETURN_MARK_FOR(Result, CallStatic##Result##MethodA, ResultType, \
1936 (const ResultType&)ret);\
1937 \
1938 JavaValue jvalue(Tag); \
1939 JNI_ArgumentPusherArray ap(methodID, args); \
1940 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK_0); \
1941 ret = jvalue.get_##ResultType(); \
1942 return ret;\
1943 JNI_END
1944
1945 // the runtime type of subword integral basic types is integer
1946 DEFINE_CALLSTATICMETHODA(jboolean, Boolean, T_BOOLEAN
1947 , HOTSPOT_JNI_CALLSTATICBOOLEANMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1948 HOTSPOT_JNI_CALLSTATICBOOLEANMETHODA_RETURN(_ret_ref));
1949 DEFINE_CALLSTATICMETHODA(jbyte, Byte, T_BYTE
1950 , HOTSPOT_JNI_CALLSTATICBYTEMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1951 HOTSPOT_JNI_CALLSTATICBYTEMETHODA_RETURN(_ret_ref));
1952 DEFINE_CALLSTATICMETHODA(jchar, Char, T_CHAR
1953 , HOTSPOT_JNI_CALLSTATICCHARMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1954 HOTSPOT_JNI_CALLSTATICCHARMETHODA_RETURN(_ret_ref));
1955 DEFINE_CALLSTATICMETHODA(jshort, Short, T_SHORT
1956 , HOTSPOT_JNI_CALLSTATICSHORTMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1957 HOTSPOT_JNI_CALLSTATICSHORTMETHODA_RETURN(_ret_ref));
1958
1959 DEFINE_CALLSTATICMETHODA(jobject, Object, T_OBJECT
1960 , HOTSPOT_JNI_CALLSTATICOBJECTMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1961 HOTSPOT_JNI_CALLSTATICOBJECTMETHODA_RETURN(_ret_ref));
1962 DEFINE_CALLSTATICMETHODA(jint, Int, T_INT
1963 , HOTSPOT_JNI_CALLSTATICINTMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1964 HOTSPOT_JNI_CALLSTATICINTMETHODA_RETURN(_ret_ref));
1965 DEFINE_CALLSTATICMETHODA(jlong, Long, T_LONG
1966 , HOTSPOT_JNI_CALLSTATICLONGMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1967 HOTSPOT_JNI_CALLSTATICLONGMETHODA_RETURN(_ret_ref));
1968 // Float and double probes don't return value because dtrace doesn't currently support it
1969 DEFINE_CALLSTATICMETHODA(jfloat, Float, T_FLOAT
1970 , HOTSPOT_JNI_CALLSTATICFLOATMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1971 HOTSPOT_JNI_CALLSTATICFLOATMETHODA_RETURN());
1972 DEFINE_CALLSTATICMETHODA(jdouble, Double, T_DOUBLE
1973 , HOTSPOT_JNI_CALLSTATICDOUBLEMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1974 HOTSPOT_JNI_CALLSTATICDOUBLEMETHODA_RETURN());
1975
1976 DT_VOID_RETURN_MARK_DECL(CallStaticVoidMethod
1977 , HOTSPOT_JNI_CALLSTATICVOIDMETHOD_RETURN());
1978 DT_VOID_RETURN_MARK_DECL(CallStaticVoidMethodV
1979 , HOTSPOT_JNI_CALLSTATICVOIDMETHODV_RETURN());
1980 DT_VOID_RETURN_MARK_DECL(CallStaticVoidMethodA
1981 , HOTSPOT_JNI_CALLSTATICVOIDMETHODA_RETURN());
1982
1983 JNI_ENTRY(void, jni_CallStaticVoidMethod(JNIEnv *env, jclass cls, jmethodID methodID, ...))
1984 JNIWrapper("CallStaticVoidMethod");
1985 HOTSPOT_JNI_CALLSTATICVOIDMETHOD_ENTRY(env, cls, (uintptr_t) methodID);
1986 DT_VOID_RETURN_MARK(CallStaticVoidMethod);
1987
1988 va_list args;
1989 va_start(args, methodID);
1990 JavaValue jvalue(T_VOID);
1991 JNI_ArgumentPusherVaArg ap(methodID, args);
1992 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK);
1993 va_end(args);
1994 JNI_END
1995
1996
1997 JNI_ENTRY(void, jni_CallStaticVoidMethodV(JNIEnv *env, jclass cls, jmethodID methodID, va_list args))
1998 JNIWrapper("CallStaticVoidMethodV");
1999 HOTSPOT_JNI_CALLSTATICVOIDMETHODV_ENTRY(env, cls, (uintptr_t) methodID);
2000 DT_VOID_RETURN_MARK(CallStaticVoidMethodV);
2001
2002 JavaValue jvalue(T_VOID);
2003 JNI_ArgumentPusherVaArg ap(methodID, args);
2004 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK);
2005 JNI_END
2006
2007
2008 JNI_ENTRY(void, jni_CallStaticVoidMethodA(JNIEnv *env, jclass cls, jmethodID methodID, const jvalue *args))
2009 JNIWrapper("CallStaticVoidMethodA");
2010 HOTSPOT_JNI_CALLSTATICVOIDMETHODA_ENTRY(env, cls, (uintptr_t) methodID);
2011 DT_VOID_RETURN_MARK(CallStaticVoidMethodA);
2012
2013 JavaValue jvalue(T_VOID);
2014 JNI_ArgumentPusherArray ap(methodID, args);
2015 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK);
2016 JNI_END
2017
2018
2019 //
2020 // Accessing Fields
2021 //
2022
2023
2024 DT_RETURN_MARK_DECL(GetFieldID, jfieldID
2025 , HOTSPOT_JNI_GETFIELDID_RETURN((uintptr_t)_ret_ref));
2026
2027 JNI_ENTRY(jfieldID, jni_GetFieldID(JNIEnv *env, jclass clazz,
2028 const char *name, const char *sig))
2029 JNIWrapper("GetFieldID");
2030 HOTSPOT_JNI_GETFIELDID_ENTRY(env, clazz, (char *) name, (char *) sig);
2031 jfieldID ret = 0;
2032 DT_RETURN_MARK(GetFieldID, jfieldID, (const jfieldID&)ret);
2033
2034 // The class should have been loaded (we have an instance of the class
2035 // passed in) so the field and signature should already be in the symbol
2036 // table. If they're not there, the field doesn't exist.
2037 TempNewSymbol fieldname = SymbolTable::probe(name, (int)strlen(name));
2038 TempNewSymbol signame = SymbolTable::probe(sig, (int)strlen(sig));
2039 if (fieldname == NULL || signame == NULL) {
2040 THROW_MSG_0(vmSymbols::java_lang_NoSuchFieldError(), (char*) name);
2041 }
2042 KlassHandle k(THREAD,
2043 java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz)));
2044 // Make sure class is initialized before handing id's out to fields
2045 k()->initialize(CHECK_NULL);
2046
2047 fieldDescriptor fd;
2048 if (!k()->oop_is_instance() ||
2049 !InstanceKlass::cast(k())->find_field(fieldname, signame, false, &fd)) {
2050 THROW_MSG_0(vmSymbols::java_lang_NoSuchFieldError(), (char*) name);
2051 }
2052
2053 // A jfieldID for a non-static field is simply the offset of the field within the instanceOop
2054 // It may also have hash bits for k, if VerifyJNIFields is turned on.
2055 ret = jfieldIDWorkaround::to_instance_jfieldID(k(), fd.offset());
2056 return ret;
2057 JNI_END
2058
2059
2060 JNI_ENTRY(jobject, jni_GetObjectField(JNIEnv *env, jobject obj, jfieldID fieldID))
2061 JNIWrapper("GetObjectField");
2062 HOTSPOT_JNI_GETOBJECTFIELD_ENTRY(env, obj, (uintptr_t) fieldID);
2063 oop o = JNIHandles::resolve_non_null(obj);
2064 Klass* k = o->klass();
2065 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID);
2066 // Keep JVMTI addition small and only check enabled flag here.
2067 // jni_GetField_probe() assumes that is okay to create handles.
2068 if (JvmtiExport::should_post_field_access()) {
2069 o = JvmtiExport::jni_GetField_probe(thread, obj, o, k, fieldID, false);
2070 }
2071 jobject ret = JNIHandles::make_local(env, o->obj_field(offset));
2072 #if INCLUDE_ALL_GCS
2073 // If G1 is enabled and we are accessing the value of the referent
2074 // field in a reference object then we need to register a non-null
2075 // referent with the SATB barrier.
2076 if (UseG1GC) {
2077 bool needs_barrier = false;
2078
2079 if (ret != NULL &&
2080 offset == java_lang_ref_Reference::referent_offset &&
2081 InstanceKlass::cast(k)->reference_type() != REF_NONE) {
2082 assert(InstanceKlass::cast(k)->is_subclass_of(SystemDictionary::Reference_klass()), "sanity");
2083 needs_barrier = true;
2084 }
2085
2086 if (needs_barrier) {
2087 oop referent = JNIHandles::resolve(ret);
2088 G1SATBCardTableModRefBS::enqueue(referent);
2089 }
2090 }
2091 #endif // INCLUDE_ALL_GCS
2092 HOTSPOT_JNI_GETOBJECTFIELD_RETURN(ret);
2093 return ret;
2094 JNI_END
2095
2096
2097
2098 #define DEFINE_GETFIELD(Return,Fieldname,Result \
2099 , EntryProbe, ReturnProbe) \
2100 \
2101 DT_RETURN_MARK_DECL_FOR(Result, Get##Result##Field, Return \
2102 , ReturnProbe); \
2103 \
2104 JNI_QUICK_ENTRY(Return, jni_Get##Result##Field(JNIEnv *env, jobject obj, jfieldID fieldID)) \
2105 JNIWrapper("Get" XSTR(Result) "Field"); \
2106 \
2107 EntryProbe; \
2108 Return ret = 0;\
2109 DT_RETURN_MARK_FOR(Result, Get##Result##Field, Return, (const Return&)ret);\
2110 \
2111 oop o = JNIHandles::resolve_non_null(obj); \
2112 Klass* k = o->klass(); \
2113 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID); \
2114 /* Keep JVMTI addition small and only check enabled flag here. */ \
2115 /* jni_GetField_probe_nh() assumes that is not okay to create handles */ \
2116 /* and creates a ResetNoHandleMark. */ \
2117 if (JvmtiExport::should_post_field_access()) { \
2118 o = JvmtiExport::jni_GetField_probe_nh(thread, obj, o, k, fieldID, false); \
2119 } \
2120 ret = o->Fieldname##_field(offset); \
2121 return ret; \
2122 JNI_END
2123
2124 DEFINE_GETFIELD(jboolean, bool, Boolean
2125 , HOTSPOT_JNI_GETBOOLEANFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2126 HOTSPOT_JNI_GETBOOLEANFIELD_RETURN(_ret_ref))
2127 DEFINE_GETFIELD(jbyte, byte, Byte
2128 , HOTSPOT_JNI_GETBYTEFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2129 HOTSPOT_JNI_GETBYTEFIELD_RETURN(_ret_ref))
2130 DEFINE_GETFIELD(jchar, char, Char
2131 , HOTSPOT_JNI_GETCHARFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2132 HOTSPOT_JNI_GETCHARFIELD_RETURN(_ret_ref))
2133 DEFINE_GETFIELD(jshort, short, Short
2134 , HOTSPOT_JNI_GETSHORTFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2135 HOTSPOT_JNI_GETSHORTFIELD_RETURN(_ret_ref))
2136 DEFINE_GETFIELD(jint, int, Int
2137 , HOTSPOT_JNI_GETINTFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2138 HOTSPOT_JNI_GETINTFIELD_RETURN(_ret_ref))
2139 DEFINE_GETFIELD(jlong, long, Long
2140 , HOTSPOT_JNI_GETLONGFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2141 HOTSPOT_JNI_GETLONGFIELD_RETURN(_ret_ref))
2142 // Float and double probes don't return value because dtrace doesn't currently support it
2143 DEFINE_GETFIELD(jfloat, float, Float
2144 , HOTSPOT_JNI_GETFLOATFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2145 HOTSPOT_JNI_GETFLOATFIELD_RETURN())
2146 DEFINE_GETFIELD(jdouble, double, Double
2147 , HOTSPOT_JNI_GETDOUBLEFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2148 HOTSPOT_JNI_GETDOUBLEFIELD_RETURN())
2149
2150 address jni_GetBooleanField_addr() {
2151 return (address)jni_GetBooleanField;
2152 }
2153 address jni_GetByteField_addr() {
2154 return (address)jni_GetByteField;
2155 }
2156 address jni_GetCharField_addr() {
2157 return (address)jni_GetCharField;
2158 }
2159 address jni_GetShortField_addr() {
2160 return (address)jni_GetShortField;
2161 }
2162 address jni_GetIntField_addr() {
2163 return (address)jni_GetIntField;
2164 }
2165 address jni_GetLongField_addr() {
2166 return (address)jni_GetLongField;
2167 }
2168 address jni_GetFloatField_addr() {
2169 return (address)jni_GetFloatField;
2170 }
2171 address jni_GetDoubleField_addr() {
2172 return (address)jni_GetDoubleField;
2173 }
2174
2175 JNI_QUICK_ENTRY(void, jni_SetObjectField(JNIEnv *env, jobject obj, jfieldID fieldID, jobject value))
2176 JNIWrapper("SetObjectField");
2177 HOTSPOT_JNI_SETOBJECTFIELD_ENTRY(env, obj, (uintptr_t) fieldID, value);
2178 oop o = JNIHandles::resolve_non_null(obj);
2179 Klass* k = o->klass();
2180 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID);
2181 // Keep JVMTI addition small and only check enabled flag here.
2182 // jni_SetField_probe_nh() assumes that is not okay to create handles
2183 // and creates a ResetNoHandleMark.
2184 if (JvmtiExport::should_post_field_modification()) {
2185 jvalue field_value;
2186 field_value.l = value;
2187 o = JvmtiExport::jni_SetField_probe_nh(thread, obj, o, k, fieldID, false, 'L', (jvalue *)&field_value);
2188 }
2189 o->obj_field_put(offset, JNIHandles::resolve(value));
2190 HOTSPOT_JNI_SETOBJECTFIELD_RETURN();
2191 JNI_END
2192
2193
2194 #define DEFINE_SETFIELD(Argument,Fieldname,Result,SigType,unionType \
2195 , EntryProbe, ReturnProbe) \
2196 \
2197 JNI_QUICK_ENTRY(void, jni_Set##Result##Field(JNIEnv *env, jobject obj, jfieldID fieldID, Argument value)) \
2198 JNIWrapper("Set" XSTR(Result) "Field"); \
2199 \
2200 EntryProbe; \
2201 \
2202 oop o = JNIHandles::resolve_non_null(obj); \
2203 Klass* k = o->klass(); \
2204 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID); \
2205 /* Keep JVMTI addition small and only check enabled flag here. */ \
2206 /* jni_SetField_probe_nh() assumes that is not okay to create handles */ \
2207 /* and creates a ResetNoHandleMark. */ \
2208 if (JvmtiExport::should_post_field_modification()) { \
2209 jvalue field_value; \
2210 field_value.unionType = value; \
2211 o = JvmtiExport::jni_SetField_probe_nh(thread, obj, o, k, fieldID, false, SigType, (jvalue *)&field_value); \
2212 } \
2213 o->Fieldname##_field_put(offset, value); \
2214 ReturnProbe; \
2215 JNI_END
2216
2217 DEFINE_SETFIELD(jboolean, bool, Boolean, 'Z', z
2218 , HOTSPOT_JNI_SETBOOLEANFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value),
2219 HOTSPOT_JNI_SETBOOLEANFIELD_RETURN())
2220 DEFINE_SETFIELD(jbyte, byte, Byte, 'B', b
2221 , HOTSPOT_JNI_SETBYTEFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value),
2222 HOTSPOT_JNI_SETBYTEFIELD_RETURN())
2223 DEFINE_SETFIELD(jchar, char, Char, 'C', c
2224 , HOTSPOT_JNI_SETCHARFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value),
2225 HOTSPOT_JNI_SETCHARFIELD_RETURN())
2226 DEFINE_SETFIELD(jshort, short, Short, 'S', s
2227 , HOTSPOT_JNI_SETSHORTFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value),
2228 HOTSPOT_JNI_SETSHORTFIELD_RETURN())
2229 DEFINE_SETFIELD(jint, int, Int, 'I', i
2230 , HOTSPOT_JNI_SETINTFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value),
2231 HOTSPOT_JNI_SETINTFIELD_RETURN())
2232 DEFINE_SETFIELD(jlong, long, Long, 'J', j
2233 , HOTSPOT_JNI_SETLONGFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value),
2234 HOTSPOT_JNI_SETLONGFIELD_RETURN())
2235 // Float and double probes don't return value because dtrace doesn't currently support it
2236 DEFINE_SETFIELD(jfloat, float, Float, 'F', f
2237 , HOTSPOT_JNI_SETFLOATFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2238 HOTSPOT_JNI_SETFLOATFIELD_RETURN())
2239 DEFINE_SETFIELD(jdouble, double, Double, 'D', d
2240 , HOTSPOT_JNI_SETDOUBLEFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2241 HOTSPOT_JNI_SETDOUBLEFIELD_RETURN())
2242
2243 DT_RETURN_MARK_DECL(ToReflectedField, jobject
2244 , HOTSPOT_JNI_TOREFLECTEDFIELD_RETURN(_ret_ref));
2245
2246 JNI_ENTRY(jobject, jni_ToReflectedField(JNIEnv *env, jclass cls, jfieldID fieldID, jboolean isStatic))
2247 JNIWrapper("ToReflectedField");
2248 HOTSPOT_JNI_TOREFLECTEDFIELD_ENTRY(env, cls, (uintptr_t) fieldID, isStatic);
2249 jobject ret = NULL;
2250 DT_RETURN_MARK(ToReflectedField, jobject, (const jobject&)ret);
2251
2252 fieldDescriptor fd;
2253 bool found = false;
2254 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2255
2256 assert(jfieldIDWorkaround::is_static_jfieldID(fieldID) == (isStatic != 0), "invalid fieldID");
2257
2258 if (isStatic) {
2259 // Static field. The fieldID a JNIid specifying the field holder and the offset within the Klass*.
2260 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID);
2261 assert(id->is_static_field_id(), "invalid static field id");
2262 found = id->find_local_field(&fd);
2263 } else {
2264 // Non-static field. The fieldID is really the offset of the field within the instanceOop.
2265 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID);
2266 found = InstanceKlass::cast(k)->find_field_from_offset(offset, false, &fd);
2267 }
2268 assert(found, "bad fieldID passed into jni_ToReflectedField");
2269 oop reflected = Reflection::new_field(&fd, CHECK_NULL);
2270 ret = JNIHandles::make_local(env, reflected);
2271 return ret;
2272 JNI_END
2273
2274
2275 //
2276 // Accessing Static Fields
2277 //
2278 DT_RETURN_MARK_DECL(GetStaticFieldID, jfieldID
2279 , HOTSPOT_JNI_GETSTATICFIELDID_RETURN((uintptr_t)_ret_ref));
2280
2281 JNI_ENTRY(jfieldID, jni_GetStaticFieldID(JNIEnv *env, jclass clazz,
2282 const char *name, const char *sig))
2283 JNIWrapper("GetStaticFieldID");
2284 HOTSPOT_JNI_GETSTATICFIELDID_ENTRY(env, clazz, (char *) name, (char *) sig);
2285 jfieldID ret = NULL;
2286 DT_RETURN_MARK(GetStaticFieldID, jfieldID, (const jfieldID&)ret);
2287
2288 // The class should have been loaded (we have an instance of the class
2289 // passed in) so the field and signature should already be in the symbol
2290 // table. If they're not there, the field doesn't exist.
2291 TempNewSymbol fieldname = SymbolTable::probe(name, (int)strlen(name));
2292 TempNewSymbol signame = SymbolTable::probe(sig, (int)strlen(sig));
2293 if (fieldname == NULL || signame == NULL) {
2294 THROW_MSG_0(vmSymbols::java_lang_NoSuchFieldError(), (char*) name);
2295 }
2296 KlassHandle k(THREAD,
2297 java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz)));
2298 // Make sure class is initialized before handing id's out to static fields
2299 k()->initialize(CHECK_NULL);
2300
2301 fieldDescriptor fd;
2302 if (!k()->oop_is_instance() ||
2303 !InstanceKlass::cast(k())->find_field(fieldname, signame, true, &fd)) {
2304 THROW_MSG_0(vmSymbols::java_lang_NoSuchFieldError(), (char*) name);
2305 }
2306
2307 // A jfieldID for a static field is a JNIid specifying the field holder and the offset within the Klass*
2308 JNIid* id = fd.field_holder()->jni_id_for(fd.offset());
2309 debug_only(id->set_is_static_field_id();)
2310
2311 debug_only(id->verify(fd.field_holder()));
2312
2313 ret = jfieldIDWorkaround::to_static_jfieldID(id);
2314 return ret;
2315 JNI_END
2316
2317
2318 JNI_ENTRY(jobject, jni_GetStaticObjectField(JNIEnv *env, jclass clazz, jfieldID fieldID))
2319 JNIWrapper("GetStaticObjectField");
2320 HOTSPOT_JNI_GETSTATICOBJECTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID);
2321 #if INCLUDE_JNI_CHECK
2322 DEBUG_ONLY(Klass* param_k = jniCheck::validate_class(thread, clazz);)
2323 #endif // INCLUDE_JNI_CHECK
2324 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID);
2325 assert(id->is_static_field_id(), "invalid static field id");
2326 // Keep JVMTI addition small and only check enabled flag here.
2327 // jni_GetField_probe() assumes that is okay to create handles.
2328 if (JvmtiExport::should_post_field_access()) {
2329 JvmtiExport::jni_GetField_probe(thread, NULL, NULL, id->holder(), fieldID, true);
2330 }
2331 jobject ret = JNIHandles::make_local(id->holder()->java_mirror()->obj_field(id->offset()));
2332 HOTSPOT_JNI_GETSTATICOBJECTFIELD_RETURN(ret);
2333 return ret;
2334 JNI_END
2335
2336
2337 #define DEFINE_GETSTATICFIELD(Return,Fieldname,Result \
2338 , EntryProbe, ReturnProbe) \
2339 \
2340 DT_RETURN_MARK_DECL_FOR(Result, GetStatic##Result##Field, Return \
2341 , ReturnProbe); \
2342 \
2343 JNI_ENTRY(Return, jni_GetStatic##Result##Field(JNIEnv *env, jclass clazz, jfieldID fieldID)) \
2344 JNIWrapper("GetStatic" XSTR(Result) "Field"); \
2345 EntryProbe; \
2346 Return ret = 0;\
2347 DT_RETURN_MARK_FOR(Result, GetStatic##Result##Field, Return, \
2348 (const Return&)ret);\
2349 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID); \
2350 assert(id->is_static_field_id(), "invalid static field id"); \
2351 /* Keep JVMTI addition small and only check enabled flag here. */ \
2352 /* jni_GetField_probe() assumes that is okay to create handles. */ \
2353 if (JvmtiExport::should_post_field_access()) { \
2354 JvmtiExport::jni_GetField_probe(thread, NULL, NULL, id->holder(), fieldID, true); \
2355 } \
2356 ret = id->holder()->java_mirror()-> Fieldname##_field (id->offset()); \
2357 return ret;\
2358 JNI_END
2359
2360 DEFINE_GETSTATICFIELD(jboolean, bool, Boolean
2361 , HOTSPOT_JNI_GETSTATICBOOLEANFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICBOOLEANFIELD_RETURN(_ret_ref))
2362 DEFINE_GETSTATICFIELD(jbyte, byte, Byte
2363 , HOTSPOT_JNI_GETSTATICBYTEFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICBYTEFIELD_RETURN(_ret_ref) )
2364 DEFINE_GETSTATICFIELD(jchar, char, Char
2365 , HOTSPOT_JNI_GETSTATICCHARFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICCHARFIELD_RETURN(_ret_ref) )
2366 DEFINE_GETSTATICFIELD(jshort, short, Short
2367 , HOTSPOT_JNI_GETSTATICSHORTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICSHORTFIELD_RETURN(_ret_ref) )
2368 DEFINE_GETSTATICFIELD(jint, int, Int
2369 , HOTSPOT_JNI_GETSTATICINTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICINTFIELD_RETURN(_ret_ref) )
2370 DEFINE_GETSTATICFIELD(jlong, long, Long
2371 , HOTSPOT_JNI_GETSTATICLONGFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICLONGFIELD_RETURN(_ret_ref) )
2372 // Float and double probes don't return value because dtrace doesn't currently support it
2373 DEFINE_GETSTATICFIELD(jfloat, float, Float
2374 , HOTSPOT_JNI_GETSTATICFLOATFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICFLOATFIELD_RETURN() )
2375 DEFINE_GETSTATICFIELD(jdouble, double, Double
2376 , HOTSPOT_JNI_GETSTATICDOUBLEFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICDOUBLEFIELD_RETURN() )
2377
2378 JNI_ENTRY(void, jni_SetStaticObjectField(JNIEnv *env, jclass clazz, jfieldID fieldID, jobject value))
2379 JNIWrapper("SetStaticObjectField");
2380 HOTSPOT_JNI_SETSTATICOBJECTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value);
2381 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID);
2382 assert(id->is_static_field_id(), "invalid static field id");
2383 // Keep JVMTI addition small and only check enabled flag here.
2384 // jni_SetField_probe() assumes that is okay to create handles.
2385 if (JvmtiExport::should_post_field_modification()) {
2386 jvalue field_value;
2387 field_value.l = value;
2388 JvmtiExport::jni_SetField_probe(thread, NULL, NULL, id->holder(), fieldID, true, 'L', (jvalue *)&field_value);
2389 }
2390 id->holder()->java_mirror()->obj_field_put(id->offset(), JNIHandles::resolve(value));
2391 HOTSPOT_JNI_SETSTATICOBJECTFIELD_RETURN();
2392 JNI_END
2393
2394
2395
2396 #define DEFINE_SETSTATICFIELD(Argument,Fieldname,Result,SigType,unionType \
2397 , EntryProbe, ReturnProbe) \
2398 \
2399 JNI_ENTRY(void, jni_SetStatic##Result##Field(JNIEnv *env, jclass clazz, jfieldID fieldID, Argument value)) \
2400 JNIWrapper("SetStatic" XSTR(Result) "Field"); \
2401 EntryProbe; \
2402 \
2403 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID); \
2404 assert(id->is_static_field_id(), "invalid static field id"); \
2405 /* Keep JVMTI addition small and only check enabled flag here. */ \
2406 /* jni_SetField_probe() assumes that is okay to create handles. */ \
2407 if (JvmtiExport::should_post_field_modification()) { \
2408 jvalue field_value; \
2409 field_value.unionType = value; \
2410 JvmtiExport::jni_SetField_probe(thread, NULL, NULL, id->holder(), fieldID, true, SigType, (jvalue *)&field_value); \
2411 } \
2412 id->holder()->java_mirror()-> Fieldname##_field_put (id->offset(), value); \
2413 ReturnProbe;\
2414 JNI_END
2415
2416 DEFINE_SETSTATICFIELD(jboolean, bool, Boolean, 'Z', z
2417 , HOTSPOT_JNI_SETSTATICBOOLEANFIELD_ENTRY(env, clazz, (uintptr_t)fieldID, value),
2418 HOTSPOT_JNI_SETSTATICBOOLEANFIELD_RETURN())
2419 DEFINE_SETSTATICFIELD(jbyte, byte, Byte, 'B', b
2420 , HOTSPOT_JNI_SETSTATICBYTEFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value),
2421 HOTSPOT_JNI_SETSTATICBYTEFIELD_RETURN())
2422 DEFINE_SETSTATICFIELD(jchar, char, Char, 'C', c
2423 , HOTSPOT_JNI_SETSTATICCHARFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value),
2424 HOTSPOT_JNI_SETSTATICCHARFIELD_RETURN())
2425 DEFINE_SETSTATICFIELD(jshort, short, Short, 'S', s
2426 , HOTSPOT_JNI_SETSTATICSHORTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value),
2427 HOTSPOT_JNI_SETSTATICSHORTFIELD_RETURN())
2428 DEFINE_SETSTATICFIELD(jint, int, Int, 'I', i
2429 , HOTSPOT_JNI_SETSTATICINTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value),
2430 HOTSPOT_JNI_SETSTATICINTFIELD_RETURN())
2431 DEFINE_SETSTATICFIELD(jlong, long, Long, 'J', j
2432 , HOTSPOT_JNI_SETSTATICLONGFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value),
2433 HOTSPOT_JNI_SETSTATICLONGFIELD_RETURN())
2434 // Float and double probes don't return value because dtrace doesn't currently support it
2435 DEFINE_SETSTATICFIELD(jfloat, float, Float, 'F', f
2436 , HOTSPOT_JNI_SETSTATICFLOATFIELD_ENTRY(env, clazz, (uintptr_t) fieldID),
2437 HOTSPOT_JNI_SETSTATICFLOATFIELD_RETURN())
2438 DEFINE_SETSTATICFIELD(jdouble, double, Double, 'D', d
2439 , HOTSPOT_JNI_SETSTATICDOUBLEFIELD_ENTRY(env, clazz, (uintptr_t) fieldID),
2440 HOTSPOT_JNI_SETSTATICDOUBLEFIELD_RETURN())
2441
2442 //
2443 // String Operations
2444 //
2445
2446 // Unicode Interface
2447
2448 DT_RETURN_MARK_DECL(NewString, jstring
2449 , HOTSPOT_JNI_NEWSTRING_RETURN(_ret_ref));
2450
2451 JNI_ENTRY(jstring, jni_NewString(JNIEnv *env, const jchar *unicodeChars, jsize len))
2452 JNIWrapper("NewString");
2453 HOTSPOT_JNI_NEWSTRING_ENTRY(env, (uint16_t *) unicodeChars, len);
2454 jstring ret = NULL;
2455 DT_RETURN_MARK(NewString, jstring, (const jstring&)ret);
2456 oop string=java_lang_String::create_oop_from_unicode((jchar*) unicodeChars, len, CHECK_NULL);
2457 ret = (jstring) JNIHandles::make_local(env, string);
2458 return ret;
2459 JNI_END
2460
2461
2462 JNI_QUICK_ENTRY(jsize, jni_GetStringLength(JNIEnv *env, jstring string))
2463 JNIWrapper("GetStringLength");
2464 HOTSPOT_JNI_GETSTRINGLENGTH_ENTRY(env, string);
2465 jsize ret = 0;
2466 oop s = JNIHandles::resolve_non_null(string);
2467 if (java_lang_String::value(s) != NULL) {
2468 ret = java_lang_String::length(s);
2469 }
2470 HOTSPOT_JNI_GETSTRINGLENGTH_RETURN(ret);
2471 return ret;
2472 JNI_END
2473
2474
2475 JNI_QUICK_ENTRY(const jchar*, jni_GetStringChars(
2476 JNIEnv *env, jstring string, jboolean *isCopy))
2477 JNIWrapper("GetStringChars");
2478 HOTSPOT_JNI_GETSTRINGCHARS_ENTRY(env, string, (uintptr_t *) isCopy);
2479 jchar* buf = NULL;
2480 oop s = JNIHandles::resolve_non_null(string);
2481 typeArrayOop s_value = java_lang_String::value(s);
2482 if (s_value != NULL) {
2483 int s_len = java_lang_String::length(s);
2484 int s_offset = java_lang_String::offset(s);
2485 buf = NEW_C_HEAP_ARRAY_RETURN_NULL(jchar, s_len + 1, mtInternal); // add one for zero termination
2486 /* JNI Specification states return NULL on OOM */
2487 if (buf != NULL) {
2488 if (s_len > 0) {
2489 memcpy(buf, s_value->char_at_addr(s_offset), sizeof(jchar)*s_len);
2490 }
2491 buf[s_len] = 0;
2492 //%note jni_5
2493 if (isCopy != NULL) {
2494 *isCopy = JNI_TRUE;
2495 }
2496 }
2497 }
2498 HOTSPOT_JNI_GETSTRINGCHARS_RETURN(buf);
2499 return buf;
2500 JNI_END
2501
2502
2503 JNI_QUICK_ENTRY(void, jni_ReleaseStringChars(JNIEnv *env, jstring str, const jchar *chars))
2504 JNIWrapper("ReleaseStringChars");
2505 HOTSPOT_JNI_RELEASESTRINGCHARS_ENTRY(env, str, (uint16_t *) chars);
2506 //%note jni_6
2507 if (chars != NULL) {
2508 // Since String objects are supposed to be immutable, don't copy any
2509 // new data back. A bad user will have to go after the char array.
2510 FreeHeap((void*) chars);
2511 }
2512 HOTSPOT_JNI_RELEASESTRINGCHARS_RETURN();
2513 JNI_END
2514
2515
2516 // UTF Interface
2517
2518 DT_RETURN_MARK_DECL(NewStringUTF, jstring
2519 , HOTSPOT_JNI_NEWSTRINGUTF_RETURN(_ret_ref));
2520
2521 JNI_ENTRY(jstring, jni_NewStringUTF(JNIEnv *env, const char *bytes))
2522 JNIWrapper("NewStringUTF");
2523 HOTSPOT_JNI_NEWSTRINGUTF_ENTRY(env, (char *) bytes);
2524 jstring ret;
2525 DT_RETURN_MARK(NewStringUTF, jstring, (const jstring&)ret);
2526
2527 oop result = java_lang_String::create_oop_from_str((char*) bytes, CHECK_NULL);
2528 ret = (jstring) JNIHandles::make_local(env, result);
2529 return ret;
2530 JNI_END
2531
2532
2533 JNI_ENTRY(jsize, jni_GetStringUTFLength(JNIEnv *env, jstring string))
2534 JNIWrapper("GetStringUTFLength");
2535 HOTSPOT_JNI_GETSTRINGUTFLENGTH_ENTRY(env, string);
2536 jsize ret = 0;
2537 oop java_string = JNIHandles::resolve_non_null(string);
2538 if (java_lang_String::value(java_string) != NULL) {
2539 ret = java_lang_String::utf8_length(java_string);
2540 }
2541 HOTSPOT_JNI_GETSTRINGUTFLENGTH_RETURN(ret);
2542 return ret;
2543 JNI_END
2544
2545
2546 JNI_ENTRY(const char*, jni_GetStringUTFChars(JNIEnv *env, jstring string, jboolean *isCopy))
2547 JNIWrapper("GetStringUTFChars");
2548 HOTSPOT_JNI_GETSTRINGUTFCHARS_ENTRY(env, string, (uintptr_t *) isCopy);
2549 char* result = NULL;
2550 oop java_string = JNIHandles::resolve_non_null(string);
2551 if (java_lang_String::value(java_string) != NULL) {
2552 size_t length = java_lang_String::utf8_length(java_string);
2553 /* JNI Specification states return NULL on OOM */
2554 result = AllocateHeap(length + 1, mtInternal, 0, AllocFailStrategy::RETURN_NULL);
2555 if (result != NULL) {
2556 java_lang_String::as_utf8_string(java_string, result, (int) length + 1);
2557 if (isCopy != NULL) {
2558 *isCopy = JNI_TRUE;
2559 }
2560 }
2561 }
2562 HOTSPOT_JNI_GETSTRINGUTFCHARS_RETURN(result);
2563 return result;
2564 JNI_END
2565
2566
2567 JNI_LEAF(void, jni_ReleaseStringUTFChars(JNIEnv *env, jstring str, const char *chars))
2568 JNIWrapper("ReleaseStringUTFChars");
2569 HOTSPOT_JNI_RELEASESTRINGUTFCHARS_ENTRY(env, str, (char *) chars);
2570 if (chars != NULL) {
2571 FreeHeap((char*) chars);
2572 }
2573 HOTSPOT_JNI_RELEASESTRINGUTFCHARS_RETURN();
2574 JNI_END
2575
2576
2577 JNI_QUICK_ENTRY(jsize, jni_GetArrayLength(JNIEnv *env, jarray array))
2578 JNIWrapper("GetArrayLength");
2579 HOTSPOT_JNI_GETARRAYLENGTH_ENTRY(env, array);
2580 arrayOop a = arrayOop(JNIHandles::resolve_non_null(array));
2581 assert(a->is_array(), "must be array");
2582 jsize ret = a->length();
2583 HOTSPOT_JNI_GETARRAYLENGTH_RETURN(ret);
2584 return ret;
2585 JNI_END
2586
2587
2588 //
2589 // Object Array Operations
2590 //
2591
2592 DT_RETURN_MARK_DECL(NewObjectArray, jobjectArray
2593 , HOTSPOT_JNI_NEWOBJECTARRAY_RETURN(_ret_ref));
2594
2595 JNI_ENTRY(jobjectArray, jni_NewObjectArray(JNIEnv *env, jsize length, jclass elementClass, jobject initialElement))
2596 JNIWrapper("NewObjectArray");
2597 HOTSPOT_JNI_NEWOBJECTARRAY_ENTRY(env, length, elementClass, initialElement);
2598 jobjectArray ret = NULL;
2599 DT_RETURN_MARK(NewObjectArray, jobjectArray, (const jobjectArray&)ret);
2600 KlassHandle ek(THREAD, java_lang_Class::as_Klass(JNIHandles::resolve_non_null(elementClass)));
2601 Klass* ako = ek()->array_klass(CHECK_NULL);
2602 KlassHandle ak = KlassHandle(THREAD, ako);
2603 ObjArrayKlass::cast(ak())->initialize(CHECK_NULL);
2604 objArrayOop result = ObjArrayKlass::cast(ak())->allocate(length, CHECK_NULL);
2605 oop initial_value = JNIHandles::resolve(initialElement);
2606 if (initial_value != NULL) { // array already initialized with NULL
2607 for (int index = 0; index < length; index++) {
2608 result->obj_at_put(index, initial_value);
2609 }
2610 }
2611 ret = (jobjectArray) JNIHandles::make_local(env, result);
2612 return ret;
2613 JNI_END
2614
2615 DT_RETURN_MARK_DECL(GetObjectArrayElement, jobject
2616 , HOTSPOT_JNI_GETOBJECTARRAYELEMENT_RETURN(_ret_ref));
2617
2618 JNI_ENTRY(jobject, jni_GetObjectArrayElement(JNIEnv *env, jobjectArray array, jsize index))
2619 JNIWrapper("GetObjectArrayElement");
2620 HOTSPOT_JNI_GETOBJECTARRAYELEMENT_ENTRY(env, array, index);
2621 jobject ret = NULL;
2622 DT_RETURN_MARK(GetObjectArrayElement, jobject, (const jobject&)ret);
2623 objArrayOop a = objArrayOop(JNIHandles::resolve_non_null(array));
2624 if (a->is_within_bounds(index)) {
2625 ret = JNIHandles::make_local(env, a->obj_at(index));
2626 return ret;
2627 } else {
2628 char buf[jintAsStringSize];
2629 sprintf(buf, "%d", index);
2630 THROW_MSG_0(vmSymbols::java_lang_ArrayIndexOutOfBoundsException(), buf);
2631 }
2632 JNI_END
2633
2634 DT_VOID_RETURN_MARK_DECL(SetObjectArrayElement
2635 , HOTSPOT_JNI_SETOBJECTARRAYELEMENT_RETURN());
2636
2637 JNI_ENTRY(void, jni_SetObjectArrayElement(JNIEnv *env, jobjectArray array, jsize index, jobject value))
2638 JNIWrapper("SetObjectArrayElement");
2639 HOTSPOT_JNI_SETOBJECTARRAYELEMENT_ENTRY(env, array, index, value);
2640 DT_VOID_RETURN_MARK(SetObjectArrayElement);
2641
2642 objArrayOop a = objArrayOop(JNIHandles::resolve_non_null(array));
2643 oop v = JNIHandles::resolve(value);
2644 if (a->is_within_bounds(index)) {
2645 if (v == NULL || v->is_a(ObjArrayKlass::cast(a->klass())->element_klass())) {
2646 a->obj_at_put(index, v);
2647 } else {
2648 THROW(vmSymbols::java_lang_ArrayStoreException());
2649 }
2650 } else {
2651 char buf[jintAsStringSize];
2652 sprintf(buf, "%d", index);
2653 THROW_MSG(vmSymbols::java_lang_ArrayIndexOutOfBoundsException(), buf);
2654 }
2655 JNI_END
2656
2657
2658
2659 #define DEFINE_NEWSCALARARRAY(Return,Allocator,Result \
2660 ,EntryProbe,ReturnProbe) \
2661 \
2662 DT_RETURN_MARK_DECL(New##Result##Array, Return \
2663 , ReturnProbe); \
2664 \
2665 JNI_ENTRY(Return, \
2666 jni_New##Result##Array(JNIEnv *env, jsize len)) \
2667 JNIWrapper("New" XSTR(Result) "Array"); \
2668 EntryProbe; \
2669 Return ret = NULL;\
2670 DT_RETURN_MARK(New##Result##Array, Return, (const Return&)ret);\
2671 \
2672 oop obj= oopFactory::Allocator(len, CHECK_0); \
2673 ret = (Return) JNIHandles::make_local(env, obj); \
2674 return ret;\
2675 JNI_END
2676
2677 DEFINE_NEWSCALARARRAY(jbooleanArray, new_boolArray, Boolean,
2678 HOTSPOT_JNI_NEWBOOLEANARRAY_ENTRY(env, len),
2679 HOTSPOT_JNI_NEWBOOLEANARRAY_RETURN(_ret_ref))
2680 DEFINE_NEWSCALARARRAY(jbyteArray, new_byteArray, Byte,
2681 HOTSPOT_JNI_NEWBYTEARRAY_ENTRY(env, len),
2682 HOTSPOT_JNI_NEWBYTEARRAY_RETURN(_ret_ref))
2683 DEFINE_NEWSCALARARRAY(jshortArray, new_shortArray, Short,
2684 HOTSPOT_JNI_NEWSHORTARRAY_ENTRY(env, len),
2685 HOTSPOT_JNI_NEWSHORTARRAY_RETURN(_ret_ref))
2686 DEFINE_NEWSCALARARRAY(jcharArray, new_charArray, Char,
2687 HOTSPOT_JNI_NEWCHARARRAY_ENTRY(env, len),
2688 HOTSPOT_JNI_NEWCHARARRAY_RETURN(_ret_ref))
2689 DEFINE_NEWSCALARARRAY(jintArray, new_intArray, Int,
2690 HOTSPOT_JNI_NEWINTARRAY_ENTRY(env, len),
2691 HOTSPOT_JNI_NEWINTARRAY_RETURN(_ret_ref))
2692 DEFINE_NEWSCALARARRAY(jlongArray, new_longArray, Long,
2693 HOTSPOT_JNI_NEWLONGARRAY_ENTRY(env, len),
2694 HOTSPOT_JNI_NEWLONGARRAY_RETURN(_ret_ref))
2695 DEFINE_NEWSCALARARRAY(jfloatArray, new_singleArray, Float,
2696 HOTSPOT_JNI_NEWFLOATARRAY_ENTRY(env, len),
2697 HOTSPOT_JNI_NEWFLOATARRAY_RETURN(_ret_ref))
2698 DEFINE_NEWSCALARARRAY(jdoubleArray, new_doubleArray, Double,
2699 HOTSPOT_JNI_NEWDOUBLEARRAY_ENTRY(env, len),
2700 HOTSPOT_JNI_NEWDOUBLEARRAY_RETURN(_ret_ref))
2701
2702 // Return an address which will fault if the caller writes to it.
2703
2704 static char* get_bad_address() {
2705 static char* bad_address = NULL;
2706 if (bad_address == NULL) {
2707 size_t size = os::vm_allocation_granularity();
2708 bad_address = os::reserve_memory(size);
2709 if (bad_address != NULL) {
2710 os::protect_memory(bad_address, size, os::MEM_PROT_READ,
2711 /*is_committed*/false);
2712 MemTracker::record_virtual_memory_type((void*)bad_address, mtInternal);
2713 }
2714 }
2715 return bad_address;
2716 }
2717
2718
2719
2720 #define DEFINE_GETSCALARARRAYELEMENTS(ElementTag,ElementType,Result, Tag \
2721 , EntryProbe, ReturnProbe) \
2722 \
2723 JNI_QUICK_ENTRY(ElementType*, \
2724 jni_Get##Result##ArrayElements(JNIEnv *env, ElementType##Array array, jboolean *isCopy)) \
2725 JNIWrapper("Get" XSTR(Result) "ArrayElements"); \
2726 EntryProbe; \
2727 /* allocate an chunk of memory in c land */ \
2728 typeArrayOop a = typeArrayOop(JNIHandles::resolve_non_null(array)); \
2729 ElementType* result; \
2730 int len = a->length(); \
2731 if (len == 0) { \
2732 /* Empty array: legal but useless, can't return NULL. \
2733 * Return a pointer to something useless. \
2734 * Avoid asserts in typeArrayOop. */ \
2735 result = (ElementType*)get_bad_address(); \
2736 } else { \
2737 /* JNI Specification states return NULL on OOM */ \
2738 result = NEW_C_HEAP_ARRAY_RETURN_NULL(ElementType, len, mtInternal); \
2739 if (result != NULL) { \
2740 /* copy the array to the c chunk */ \
2741 memcpy(result, a->Tag##_at_addr(0), sizeof(ElementType)*len); \
2742 if (isCopy) { \
2743 *isCopy = JNI_TRUE; \
2744 } \
2745 } \
2746 } \
2747 ReturnProbe; \
2748 return result; \
2749 JNI_END
2750
2751 DEFINE_GETSCALARARRAYELEMENTS(T_BOOLEAN, jboolean, Boolean, bool
2752 , HOTSPOT_JNI_GETBOOLEANARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy),
2753 HOTSPOT_JNI_GETBOOLEANARRAYELEMENTS_RETURN((uintptr_t*)result))
2754 DEFINE_GETSCALARARRAYELEMENTS(T_BYTE, jbyte, Byte, byte
2755 , HOTSPOT_JNI_GETBYTEARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy),
2756 HOTSPOT_JNI_GETBYTEARRAYELEMENTS_RETURN((char*)result))
2757 DEFINE_GETSCALARARRAYELEMENTS(T_SHORT, jshort, Short, short
2758 , HOTSPOT_JNI_GETSHORTARRAYELEMENTS_ENTRY(env, (uint16_t*) array, (uintptr_t *) isCopy),
2759 HOTSPOT_JNI_GETSHORTARRAYELEMENTS_RETURN((uint16_t*)result))
2760 DEFINE_GETSCALARARRAYELEMENTS(T_CHAR, jchar, Char, char
2761 , HOTSPOT_JNI_GETCHARARRAYELEMENTS_ENTRY(env, (uint16_t*) array, (uintptr_t *) isCopy),
2762 HOTSPOT_JNI_GETCHARARRAYELEMENTS_RETURN(result))
2763 DEFINE_GETSCALARARRAYELEMENTS(T_INT, jint, Int, int
2764 , HOTSPOT_JNI_GETINTARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy),
2765 HOTSPOT_JNI_GETINTARRAYELEMENTS_RETURN((uint32_t*)result))
2766 DEFINE_GETSCALARARRAYELEMENTS(T_LONG, jlong, Long, long
2767 , HOTSPOT_JNI_GETLONGARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy),
2768 HOTSPOT_JNI_GETLONGARRAYELEMENTS_RETURN(((uintptr_t*)result)))
2769 // Float and double probes don't return value because dtrace doesn't currently support it
2770 DEFINE_GETSCALARARRAYELEMENTS(T_FLOAT, jfloat, Float, float
2771 , HOTSPOT_JNI_GETFLOATARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy),
2772 HOTSPOT_JNI_GETFLOATARRAYELEMENTS_RETURN(result))
2773 DEFINE_GETSCALARARRAYELEMENTS(T_DOUBLE, jdouble, Double, double
2774 , HOTSPOT_JNI_GETDOUBLEARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy),
2775 HOTSPOT_JNI_GETDOUBLEARRAYELEMENTS_RETURN(result))
2776
2777
2778 #define DEFINE_RELEASESCALARARRAYELEMENTS(ElementTag,ElementType,Result,Tag \
2779 , EntryProbe, ReturnProbe);\
2780 \
2781 JNI_QUICK_ENTRY(void, \
2782 jni_Release##Result##ArrayElements(JNIEnv *env, ElementType##Array array, \
2783 ElementType *buf, jint mode)) \
2784 JNIWrapper("Release" XSTR(Result) "ArrayElements"); \
2785 EntryProbe; \
2786 typeArrayOop a = typeArrayOop(JNIHandles::resolve_non_null(array)); \
2787 int len = a->length(); \
2788 if (len != 0) { /* Empty array: nothing to free or copy. */ \
2789 if ((mode == 0) || (mode == JNI_COMMIT)) { \
2790 memcpy(a->Tag##_at_addr(0), buf, sizeof(ElementType)*len); \
2791 } \
2792 if ((mode == 0) || (mode == JNI_ABORT)) { \
2793 FreeHeap(buf); \
2794 } \
2795 } \
2796 ReturnProbe; \
2797 JNI_END
2798
2799 DEFINE_RELEASESCALARARRAYELEMENTS(T_BOOLEAN, jboolean, Boolean, bool
2800 , HOTSPOT_JNI_RELEASEBOOLEANARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) buf, mode),
2801 HOTSPOT_JNI_RELEASEBOOLEANARRAYELEMENTS_RETURN())
2802 DEFINE_RELEASESCALARARRAYELEMENTS(T_BYTE, jbyte, Byte, byte
2803 , HOTSPOT_JNI_RELEASEBYTEARRAYELEMENTS_ENTRY(env, array, (char *) buf, mode),
2804 HOTSPOT_JNI_RELEASEBYTEARRAYELEMENTS_RETURN())
2805 DEFINE_RELEASESCALARARRAYELEMENTS(T_SHORT, jshort, Short, short
2806 , HOTSPOT_JNI_RELEASESHORTARRAYELEMENTS_ENTRY(env, array, (uint16_t *) buf, mode),
2807 HOTSPOT_JNI_RELEASESHORTARRAYELEMENTS_RETURN())
2808 DEFINE_RELEASESCALARARRAYELEMENTS(T_CHAR, jchar, Char, char
2809 , HOTSPOT_JNI_RELEASECHARARRAYELEMENTS_ENTRY(env, array, (uint16_t *) buf, mode),
2810 HOTSPOT_JNI_RELEASECHARARRAYELEMENTS_RETURN())
2811 DEFINE_RELEASESCALARARRAYELEMENTS(T_INT, jint, Int, int
2812 , HOTSPOT_JNI_RELEASEINTARRAYELEMENTS_ENTRY(env, array, (uint32_t *) buf, mode),
2813 HOTSPOT_JNI_RELEASEINTARRAYELEMENTS_RETURN())
2814 DEFINE_RELEASESCALARARRAYELEMENTS(T_LONG, jlong, Long, long
2815 , HOTSPOT_JNI_RELEASELONGARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) buf, mode),
2816 HOTSPOT_JNI_RELEASELONGARRAYELEMENTS_RETURN())
2817 DEFINE_RELEASESCALARARRAYELEMENTS(T_FLOAT, jfloat, Float, float
2818 , HOTSPOT_JNI_RELEASEFLOATARRAYELEMENTS_ENTRY(env, array, (float *) buf, mode),
2819 HOTSPOT_JNI_RELEASEFLOATARRAYELEMENTS_RETURN())
2820 DEFINE_RELEASESCALARARRAYELEMENTS(T_DOUBLE, jdouble, Double, double
2821 , HOTSPOT_JNI_RELEASEDOUBLEARRAYELEMENTS_ENTRY(env, array, (double *) buf, mode),
2822 HOTSPOT_JNI_RELEASEDOUBLEARRAYELEMENTS_RETURN())
2823
2824
2825 #define DEFINE_GETSCALARARRAYREGION(ElementTag,ElementType,Result, Tag \
2826 , EntryProbe, ReturnProbe); \
2827 DT_VOID_RETURN_MARK_DECL(Get##Result##ArrayRegion \
2828 , ReturnProbe); \
2829 \
2830 JNI_ENTRY(void, \
2831 jni_Get##Result##ArrayRegion(JNIEnv *env, ElementType##Array array, jsize start, \
2832 jsize len, ElementType *buf)) \
2833 JNIWrapper("Get" XSTR(Result) "ArrayRegion"); \
2834 EntryProbe; \
2835 DT_VOID_RETURN_MARK(Get##Result##ArrayRegion); \
2836 typeArrayOop src = typeArrayOop(JNIHandles::resolve_non_null(array)); \
2837 if (start < 0 || len < 0 || ((unsigned int)start + (unsigned int)len > (unsigned int)src->length())) { \
2838 THROW(vmSymbols::java_lang_ArrayIndexOutOfBoundsException()); \
2839 } else { \
2840 if (len > 0) { \
2841 int sc = TypeArrayKlass::cast(src->klass())->log2_element_size(); \
2842 memcpy((u_char*) buf, \
2843 (u_char*) src->Tag##_at_addr(start), \
2844 len << sc); \
2845 } \
2846 } \
2847 JNI_END
2848
2849 DEFINE_GETSCALARARRAYREGION(T_BOOLEAN, jboolean,Boolean, bool
2850 , HOTSPOT_JNI_GETBOOLEANARRAYREGION_ENTRY(env, array, start, len, (uintptr_t *) buf),
2851 HOTSPOT_JNI_GETBOOLEANARRAYREGION_RETURN());
2852 DEFINE_GETSCALARARRAYREGION(T_BYTE, jbyte, Byte, byte
2853 , HOTSPOT_JNI_GETBYTEARRAYREGION_ENTRY(env, array, start, len, (char *) buf),
2854 HOTSPOT_JNI_GETBYTEARRAYREGION_RETURN());
2855 DEFINE_GETSCALARARRAYREGION(T_SHORT, jshort, Short, short
2856 , HOTSPOT_JNI_GETSHORTARRAYREGION_ENTRY(env, array, start, len, (uint16_t *) buf),
2857 HOTSPOT_JNI_GETSHORTARRAYREGION_RETURN());
2858 DEFINE_GETSCALARARRAYREGION(T_CHAR, jchar, Char, char
2859 , HOTSPOT_JNI_GETCHARARRAYREGION_ENTRY(env, array, start, len, (uint16_t*) buf),
2860 HOTSPOT_JNI_GETCHARARRAYREGION_RETURN());
2861 DEFINE_GETSCALARARRAYREGION(T_INT, jint, Int, int
2862 , HOTSPOT_JNI_GETINTARRAYREGION_ENTRY(env, array, start, len, (uint32_t*) buf),
2863 HOTSPOT_JNI_GETINTARRAYREGION_RETURN());
2864 DEFINE_GETSCALARARRAYREGION(T_LONG, jlong, Long, long
2865 , HOTSPOT_JNI_GETLONGARRAYREGION_ENTRY(env, array, start, len, (uintptr_t *) buf),
2866 HOTSPOT_JNI_GETLONGARRAYREGION_RETURN());
2867 DEFINE_GETSCALARARRAYREGION(T_FLOAT, jfloat, Float, float
2868 , HOTSPOT_JNI_GETFLOATARRAYREGION_ENTRY(env, array, start, len, (float *) buf),
2869 HOTSPOT_JNI_GETFLOATARRAYREGION_RETURN());
2870 DEFINE_GETSCALARARRAYREGION(T_DOUBLE, jdouble, Double, double
2871 , HOTSPOT_JNI_GETDOUBLEARRAYREGION_ENTRY(env, array, start, len, (double *) buf),
2872 HOTSPOT_JNI_GETDOUBLEARRAYREGION_RETURN());
2873
2874
2875 #define DEFINE_SETSCALARARRAYREGION(ElementTag,ElementType,Result, Tag \
2876 , EntryProbe, ReturnProbe); \
2877 DT_VOID_RETURN_MARK_DECL(Set##Result##ArrayRegion \
2878 ,ReturnProbe); \
2879 \
2880 JNI_ENTRY(void, \
2881 jni_Set##Result##ArrayRegion(JNIEnv *env, ElementType##Array array, jsize start, \
2882 jsize len, const ElementType *buf)) \
2883 JNIWrapper("Set" XSTR(Result) "ArrayRegion"); \
2884 EntryProbe; \
2885 DT_VOID_RETURN_MARK(Set##Result##ArrayRegion); \
2886 typeArrayOop dst = typeArrayOop(JNIHandles::resolve_non_null(array)); \
2887 if (start < 0 || len < 0 || ((unsigned int)start + (unsigned int)len > (unsigned int)dst->length())) { \
2888 THROW(vmSymbols::java_lang_ArrayIndexOutOfBoundsException()); \
2889 } else { \
2890 if (len > 0) { \
2891 int sc = TypeArrayKlass::cast(dst->klass())->log2_element_size(); \
2892 memcpy((u_char*) dst->Tag##_at_addr(start), \
2893 (u_char*) buf, \
2894 len << sc); \
2895 } \
2896 } \
2897 JNI_END
2898
2899 DEFINE_SETSCALARARRAYREGION(T_BOOLEAN, jboolean, Boolean, bool
2900 , HOTSPOT_JNI_SETBOOLEANARRAYREGION_ENTRY(env, array, start, len, (uintptr_t *)buf),
2901 HOTSPOT_JNI_SETBOOLEANARRAYREGION_RETURN())
2902 DEFINE_SETSCALARARRAYREGION(T_BYTE, jbyte, Byte, byte
2903 , HOTSPOT_JNI_SETBYTEARRAYREGION_ENTRY(env, array, start, len, (char *) buf),
2904 HOTSPOT_JNI_SETBYTEARRAYREGION_RETURN())
2905 DEFINE_SETSCALARARRAYREGION(T_SHORT, jshort, Short, short
2906 , HOTSPOT_JNI_SETSHORTARRAYREGION_ENTRY(env, array, start, len, (uint16_t *) buf),
2907 HOTSPOT_JNI_SETSHORTARRAYREGION_RETURN())
2908 DEFINE_SETSCALARARRAYREGION(T_CHAR, jchar, Char, char
2909 , HOTSPOT_JNI_SETCHARARRAYREGION_ENTRY(env, array, start, len, (uint16_t *) buf),
2910 HOTSPOT_JNI_SETCHARARRAYREGION_RETURN())
2911 DEFINE_SETSCALARARRAYREGION(T_INT, jint, Int, int
2912 , HOTSPOT_JNI_SETINTARRAYREGION_ENTRY(env, array, start, len, (uint32_t *) buf),
2913 HOTSPOT_JNI_SETINTARRAYREGION_RETURN())
2914 DEFINE_SETSCALARARRAYREGION(T_LONG, jlong, Long, long
2915 , HOTSPOT_JNI_SETLONGARRAYREGION_ENTRY(env, array, start, len, (uintptr_t *) buf),
2916 HOTSPOT_JNI_SETLONGARRAYREGION_RETURN())
2917 DEFINE_SETSCALARARRAYREGION(T_FLOAT, jfloat, Float, float
2918 , HOTSPOT_JNI_SETFLOATARRAYREGION_ENTRY(env, array, start, len, (float *) buf),
2919 HOTSPOT_JNI_SETFLOATARRAYREGION_RETURN())
2920 DEFINE_SETSCALARARRAYREGION(T_DOUBLE, jdouble, Double, double
2921 , HOTSPOT_JNI_SETDOUBLEARRAYREGION_ENTRY(env, array, start, len, (double *) buf),
2922 HOTSPOT_JNI_SETDOUBLEARRAYREGION_RETURN())
2923
2924
2925 //
2926 // Interception of natives
2927 //
2928
2929 // The RegisterNatives call being attempted tried to register with a method that
2930 // is not native. Ask JVM TI what prefixes have been specified. Then check
2931 // to see if the native method is now wrapped with the prefixes. See the
2932 // SetNativeMethodPrefix(es) functions in the JVM TI Spec for details.
2933 static Method* find_prefixed_native(KlassHandle k,
2934 Symbol* name, Symbol* signature, TRAPS) {
2935 #if INCLUDE_JVMTI
2936 ResourceMark rm(THREAD);
2937 Method* method;
2938 int name_len = name->utf8_length();
2939 char* name_str = name->as_utf8();
2940 int prefix_count;
2941 char** prefixes = JvmtiExport::get_all_native_method_prefixes(&prefix_count);
2942 for (int i = 0; i < prefix_count; i++) {
2943 char* prefix = prefixes[i];
2944 int prefix_len = (int)strlen(prefix);
2945
2946 // try adding this prefix to the method name and see if it matches another method name
2947 int trial_len = name_len + prefix_len;
2948 char* trial_name_str = NEW_RESOURCE_ARRAY(char, trial_len + 1);
2949 strcpy(trial_name_str, prefix);
2950 strcat(trial_name_str, name_str);
2951 TempNewSymbol trial_name = SymbolTable::probe(trial_name_str, trial_len);
2952 if (trial_name == NULL) {
2953 continue; // no such symbol, so this prefix wasn't used, try the next prefix
2954 }
2955 method = k()->lookup_method(trial_name, signature);
2956 if (method == NULL) {
2957 continue; // signature doesn't match, try the next prefix
2958 }
2959 if (method->is_native()) {
2960 method->set_is_prefixed_native();
2961 return method; // wahoo, we found a prefixed version of the method, return it
2962 }
2963 // found as non-native, so prefix is good, add it, probably just need more prefixes
2964 name_len = trial_len;
2965 name_str = trial_name_str;
2966 }
2967 #endif // INCLUDE_JVMTI
2968 return NULL; // not found
2969 }
2970
2971 static bool register_native(KlassHandle k, Symbol* name, Symbol* signature, address entry, TRAPS) {
2972 Method* method = k()->lookup_method(name, signature);
2973 if (method == NULL) {
2974 ResourceMark rm;
2975 stringStream st;
2976 st.print("Method %s name or signature does not match",
2977 Method::name_and_sig_as_C_string(k(), name, signature));
2978 THROW_MSG_(vmSymbols::java_lang_NoSuchMethodError(), st.as_string(), false);
2979 }
2980 if (!method->is_native()) {
2981 // trying to register to a non-native method, see if a JVM TI agent has added prefix(es)
2982 method = find_prefixed_native(k, name, signature, THREAD);
2983 if (method == NULL) {
2984 ResourceMark rm;
2985 stringStream st;
2986 st.print("Method %s is not declared as native",
2987 Method::name_and_sig_as_C_string(k(), name, signature));
2988 THROW_MSG_(vmSymbols::java_lang_NoSuchMethodError(), st.as_string(), false);
2989 }
2990 }
2991
2992 if (entry != NULL) {
2993 method->set_native_function(entry,
2994 Method::native_bind_event_is_interesting);
2995 } else {
2996 method->clear_native_function();
2997 }
2998 if (PrintJNIResolving) {
2999 ResourceMark rm(THREAD);
3000 tty->print_cr("[Registering JNI native method %s.%s]",
3001 method->method_holder()->external_name(),
3002 method->name()->as_C_string());
3003 }
3004 return true;
3005 }
3006
3007 DT_RETURN_MARK_DECL(RegisterNatives, jint
3008 , HOTSPOT_JNI_REGISTERNATIVES_RETURN(_ret_ref));
3009
3010 JNI_ENTRY(jint, jni_RegisterNatives(JNIEnv *env, jclass clazz,
3011 const JNINativeMethod *methods,
3012 jint nMethods))
3013 JNIWrapper("RegisterNatives");
3014 HOTSPOT_JNI_REGISTERNATIVES_ENTRY(env, clazz, (void *) methods, nMethods);
3015 jint ret = 0;
3016 DT_RETURN_MARK(RegisterNatives, jint, (const jint&)ret);
3017
3018 KlassHandle h_k(thread, java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz)));
3019
3020 for (int index = 0; index < nMethods; index++) {
3021 const char* meth_name = methods[index].name;
3022 const char* meth_sig = methods[index].signature;
3023 int meth_name_len = (int)strlen(meth_name);
3024
3025 // The class should have been loaded (we have an instance of the class
3026 // passed in) so the method and signature should already be in the symbol
3027 // table. If they're not there, the method doesn't exist.
3028 TempNewSymbol name = SymbolTable::probe(meth_name, meth_name_len);
3029 TempNewSymbol signature = SymbolTable::probe(meth_sig, (int)strlen(meth_sig));
3030
3031 if (name == NULL || signature == NULL) {
3032 ResourceMark rm;
3033 stringStream st;
3034 st.print("Method %s.%s%s not found", h_k()->external_name(), meth_name, meth_sig);
3035 // Must return negative value on failure
3036 THROW_MSG_(vmSymbols::java_lang_NoSuchMethodError(), st.as_string(), -1);
3037 }
3038
3039 bool res = register_native(h_k, name, signature,
3040 (address) methods[index].fnPtr, THREAD);
3041 if (!res) {
3042 ret = -1;
3043 break;
3044 }
3045 }
3046 return ret;
3047 JNI_END
3048
3049
3050 JNI_ENTRY(jint, jni_UnregisterNatives(JNIEnv *env, jclass clazz))
3051 JNIWrapper("UnregisterNatives");
3052 HOTSPOT_JNI_UNREGISTERNATIVES_ENTRY(env, clazz);
3053 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz));
3054 //%note jni_2
3055 if (k->oop_is_instance()) {
3056 for (int index = 0; index < InstanceKlass::cast(k)->methods()->length(); index++) {
3057 Method* m = InstanceKlass::cast(k)->methods()->at(index);
3058 if (m->is_native()) {
3059 m->clear_native_function();
3060 m->set_signature_handler(NULL);
3061 }
3062 }
3063 }
3064 HOTSPOT_JNI_UNREGISTERNATIVES_RETURN(0);
3065 return 0;
3066 JNI_END
3067
3068 //
3069 // Monitor functions
3070 //
3071
3072 DT_RETURN_MARK_DECL(MonitorEnter, jint
3073 , HOTSPOT_JNI_MONITORENTER_RETURN(_ret_ref));
3074
3075 JNI_ENTRY(jint, jni_MonitorEnter(JNIEnv *env, jobject jobj))
3076 HOTSPOT_JNI_MONITORENTER_ENTRY(env, jobj);
3077 jint ret = JNI_ERR;
3078 DT_RETURN_MARK(MonitorEnter, jint, (const jint&)ret);
3079
3080 // If the object is null, we can't do anything with it
3081 if (jobj == NULL) {
3082 THROW_(vmSymbols::java_lang_NullPointerException(), JNI_ERR);
3083 }
3084
3085 Handle obj(thread, JNIHandles::resolve_non_null(jobj));
3086 ObjectSynchronizer::jni_enter(obj, CHECK_(JNI_ERR));
3087 ret = JNI_OK;
3088 return ret;
3089 JNI_END
3090
3091 DT_RETURN_MARK_DECL(MonitorExit, jint
3092 , HOTSPOT_JNI_MONITOREXIT_RETURN(_ret_ref));
3093
3094 JNI_ENTRY(jint, jni_MonitorExit(JNIEnv *env, jobject jobj))
3095 HOTSPOT_JNI_MONITOREXIT_ENTRY(env, jobj);
3096 jint ret = JNI_ERR;
3097 DT_RETURN_MARK(MonitorExit, jint, (const jint&)ret);
3098
3099 // Don't do anything with a null object
3100 if (jobj == NULL) {
3101 THROW_(vmSymbols::java_lang_NullPointerException(), JNI_ERR);
3102 }
3103
3104 Handle obj(THREAD, JNIHandles::resolve_non_null(jobj));
3105 ObjectSynchronizer::jni_exit(obj(), CHECK_(JNI_ERR));
3106
3107 ret = JNI_OK;
3108 return ret;
3109 JNI_END
3110
3111 //
3112 // Extensions
3113 //
3114
3115 DT_VOID_RETURN_MARK_DECL(GetStringRegion
3116 , HOTSPOT_JNI_GETSTRINGREGION_RETURN());
3117
3118 JNI_ENTRY(void, jni_GetStringRegion(JNIEnv *env, jstring string, jsize start, jsize len, jchar *buf))
3119 JNIWrapper("GetStringRegion");
3120 HOTSPOT_JNI_GETSTRINGREGION_ENTRY(env, string, start, len, buf);
3121 DT_VOID_RETURN_MARK(GetStringRegion);
3122 oop s = JNIHandles::resolve_non_null(string);
3123 int s_len = java_lang_String::length(s);
3124 if (start < 0 || len < 0 || start + len > s_len) {
3125 THROW(vmSymbols::java_lang_StringIndexOutOfBoundsException());
3126 } else {
3127 if (len > 0) {
3128 int s_offset = java_lang_String::offset(s);
3129 typeArrayOop s_value = java_lang_String::value(s);
3130 memcpy(buf, s_value->char_at_addr(s_offset+start), sizeof(jchar)*len);
3131 }
3132 }
3133 JNI_END
3134
3135 DT_VOID_RETURN_MARK_DECL(GetStringUTFRegion
3136 , HOTSPOT_JNI_GETSTRINGUTFREGION_RETURN());
3137
3138 JNI_ENTRY(void, jni_GetStringUTFRegion(JNIEnv *env, jstring string, jsize start, jsize len, char *buf))
3139 JNIWrapper("GetStringUTFRegion");
3140 HOTSPOT_JNI_GETSTRINGUTFREGION_ENTRY(env, string, start, len, buf);
3141 DT_VOID_RETURN_MARK(GetStringUTFRegion);
3142 oop s = JNIHandles::resolve_non_null(string);
3143 int s_len = java_lang_String::length(s);
3144 if (start < 0 || len < 0 || start + len > s_len) {
3145 THROW(vmSymbols::java_lang_StringIndexOutOfBoundsException());
3146 } else {
3147 //%note jni_7
3148 if (len > 0) {
3149 // Assume the buffer is large enough as the JNI spec. does not require user error checking
3150 java_lang_String::as_utf8_string(s, start, len, buf, INT_MAX);
3151 // as_utf8_string null-terminates the result string
3152 } else {
3153 // JDK null-terminates the buffer even in len is zero
3154 if (buf != NULL) {
3155 buf[0] = 0;
3156 }
3157 }
3158 }
3159 JNI_END
3160
3161
3162 JNI_ENTRY(void*, jni_GetPrimitiveArrayCritical(JNIEnv *env, jarray array, jboolean *isCopy))
3163 JNIWrapper("GetPrimitiveArrayCritical");
3164 HOTSPOT_JNI_GETPRIMITIVEARRAYCRITICAL_ENTRY(env, array, (uintptr_t *) isCopy);
3165 GC_locker::lock_critical(thread);
3166 if (isCopy != NULL) {
3167 *isCopy = JNI_FALSE;
3168 }
3169 oop a = JNIHandles::resolve_non_null(array);
3170 assert(a->is_array(), "just checking");
3171 BasicType type;
3172 if (a->is_objArray()) {
3173 type = T_OBJECT;
3174 } else {
3175 type = TypeArrayKlass::cast(a->klass())->element_type();
3176 }
3177 void* ret = arrayOop(a)->base(type);
3178 HOTSPOT_JNI_GETPRIMITIVEARRAYCRITICAL_RETURN(ret);
3179 return ret;
3180 JNI_END
3181
3182
3183 JNI_ENTRY(void, jni_ReleasePrimitiveArrayCritical(JNIEnv *env, jarray array, void *carray, jint mode))
3184 JNIWrapper("ReleasePrimitiveArrayCritical");
3185 HOTSPOT_JNI_RELEASEPRIMITIVEARRAYCRITICAL_ENTRY(env, array, carray, mode);
3186 // The array, carray and mode arguments are ignored
3187 GC_locker::unlock_critical(thread);
3188 HOTSPOT_JNI_RELEASEPRIMITIVEARRAYCRITICAL_RETURN();
3189 JNI_END
3190
3191
3192 JNI_ENTRY(const jchar*, jni_GetStringCritical(JNIEnv *env, jstring string, jboolean *isCopy))
3193 JNIWrapper("GetStringCritical");
3194 HOTSPOT_JNI_GETSTRINGCRITICAL_ENTRY(env, string, (uintptr_t *) isCopy);
3195 GC_locker::lock_critical(thread);
3196 if (isCopy != NULL) {
3197 *isCopy = JNI_FALSE;
3198 }
3199 oop s = JNIHandles::resolve_non_null(string);
3200 int s_len = java_lang_String::length(s);
3201 typeArrayOop s_value = java_lang_String::value(s);
3202 int s_offset = java_lang_String::offset(s);
3203 const jchar* ret;
3204 if (s_len > 0) {
3205 ret = s_value->char_at_addr(s_offset);
3206 } else {
3207 ret = (jchar*) s_value->base(T_CHAR);
3208 }
3209 HOTSPOT_JNI_GETSTRINGCRITICAL_RETURN((uint16_t *) ret);
3210 return ret;
3211 JNI_END
3212
3213
3214 JNI_ENTRY(void, jni_ReleaseStringCritical(JNIEnv *env, jstring str, const jchar *chars))
3215 JNIWrapper("ReleaseStringCritical");
3216 HOTSPOT_JNI_RELEASESTRINGCRITICAL_ENTRY(env, str, (uint16_t *) chars);
3217 // The str and chars arguments are ignored
3218 GC_locker::unlock_critical(thread);
3219 HOTSPOT_JNI_RELEASESTRINGCRITICAL_RETURN();
3220 JNI_END
3221
3222
3223 JNI_ENTRY(jweak, jni_NewWeakGlobalRef(JNIEnv *env, jobject ref))
3224 JNIWrapper("jni_NewWeakGlobalRef");
3225 HOTSPOT_JNI_NEWWEAKGLOBALREF_ENTRY(env, ref);
3226 Handle ref_handle(thread, JNIHandles::resolve(ref));
3227 jweak ret = JNIHandles::make_weak_global(ref_handle);
3228 HOTSPOT_JNI_NEWWEAKGLOBALREF_RETURN(ret);
3229 return ret;
3230 JNI_END
3231
3232 // Must be JNI_ENTRY (with HandleMark)
3233 JNI_ENTRY(void, jni_DeleteWeakGlobalRef(JNIEnv *env, jweak ref))
3234 JNIWrapper("jni_DeleteWeakGlobalRef");
3235 HOTSPOT_JNI_DELETEWEAKGLOBALREF_ENTRY(env, ref);
3236 JNIHandles::destroy_weak_global(ref);
3237 HOTSPOT_JNI_DELETEWEAKGLOBALREF_RETURN();
3238 JNI_END
3239
3240
3241 JNI_QUICK_ENTRY(jboolean, jni_ExceptionCheck(JNIEnv *env))
3242 JNIWrapper("jni_ExceptionCheck");
3243 HOTSPOT_JNI_EXCEPTIONCHECK_ENTRY(env);
3244 jni_check_async_exceptions(thread);
3245 jboolean ret = (thread->has_pending_exception()) ? JNI_TRUE : JNI_FALSE;
3246 HOTSPOT_JNI_EXCEPTIONCHECK_RETURN(ret);
3247 return ret;
3248 JNI_END
3249
3250
3251 // Initialization state for three routines below relating to
3252 // java.nio.DirectBuffers
3253 static jint directBufferSupportInitializeStarted = 0;
3254 static volatile jint directBufferSupportInitializeEnded = 0;
3255 static volatile jint directBufferSupportInitializeFailed = 0;
3256 static jclass bufferClass = NULL;
3257 static jclass directBufferClass = NULL;
3258 static jclass directByteBufferClass = NULL;
3259 static jmethodID directByteBufferConstructor = NULL;
3260 static jfieldID directBufferAddressField = NULL;
3261 static jfieldID bufferCapacityField = NULL;
3262
3263 static jclass lookupOne(JNIEnv* env, const char* name, TRAPS) {
3264 Handle loader; // null (bootstrap) loader
3265 Handle protection_domain; // null protection domain
3266
3267 TempNewSymbol sym = SymbolTable::new_symbol(name, CHECK_NULL);
3268 jclass result = find_class_from_class_loader(env, sym, true, loader, protection_domain, true, CHECK_NULL);
3269
3270 if (TraceClassResolution && result != NULL) {
3271 trace_class_resolution(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(result)));
3272 }
3273 return result;
3274 }
3275
3276 // These lookups are done with the NULL (bootstrap) ClassLoader to
3277 // circumvent any security checks that would be done by jni_FindClass.
3278 JNI_ENTRY(bool, lookupDirectBufferClasses(JNIEnv* env))
3279 {
3280 if ((bufferClass = lookupOne(env, "java/nio/Buffer", thread)) == NULL) { return false; }
3281 if ((directBufferClass = lookupOne(env, "sun/nio/ch/DirectBuffer", thread)) == NULL) { return false; }
3282 if ((directByteBufferClass = lookupOne(env, "java/nio/DirectByteBuffer", thread)) == NULL) { return false; }
3283 return true;
3284 }
3285 JNI_END
3286
3287
3288 static bool initializeDirectBufferSupport(JNIEnv* env, JavaThread* thread) {
3289 if (directBufferSupportInitializeFailed) {
3290 return false;
3291 }
3292
3293 if (Atomic::cmpxchg(1, &directBufferSupportInitializeStarted, 0) == 0) {
3294 if (!lookupDirectBufferClasses(env)) {
3295 directBufferSupportInitializeFailed = 1;
3296 return false;
3297 }
3298
3299 // Make global references for these
3300 bufferClass = (jclass) env->NewGlobalRef(bufferClass);
3301 directBufferClass = (jclass) env->NewGlobalRef(directBufferClass);
3302 directByteBufferClass = (jclass) env->NewGlobalRef(directByteBufferClass);
3303
3304 // Get needed field and method IDs
3305 directByteBufferConstructor = env->GetMethodID(directByteBufferClass, "<init>", "(JI)V");
3306 if (env->ExceptionCheck()) {
3307 env->ExceptionClear();
3308 directBufferSupportInitializeFailed = 1;
3309 return false;
3310 }
3311 directBufferAddressField = env->GetFieldID(bufferClass, "address", "J");
3312 if (env->ExceptionCheck()) {
3313 env->ExceptionClear();
3314 directBufferSupportInitializeFailed = 1;
3315 return false;
3316 }
3317 bufferCapacityField = env->GetFieldID(bufferClass, "capacity", "I");
3318 if (env->ExceptionCheck()) {
3319 env->ExceptionClear();
3320 directBufferSupportInitializeFailed = 1;
3321 return false;
3322 }
3323
3324 if ((directByteBufferConstructor == NULL) ||
3325 (directBufferAddressField == NULL) ||
3326 (bufferCapacityField == NULL)) {
3327 directBufferSupportInitializeFailed = 1;
3328 return false;
3329 }
3330
3331 directBufferSupportInitializeEnded = 1;
3332 } else {
3333 while (!directBufferSupportInitializeEnded && !directBufferSupportInitializeFailed) {
3334 os::naked_yield();
3335 }
3336 }
3337
3338 return !directBufferSupportInitializeFailed;
3339 }
3340
3341 extern "C" jobject JNICALL jni_NewDirectByteBuffer(JNIEnv *env, void* address, jlong capacity)
3342 {
3343 // thread_from_jni_environment() will block if VM is gone.
3344 JavaThread* thread = JavaThread::thread_from_jni_environment(env);
3345
3346 JNIWrapper("jni_NewDirectByteBuffer");
3347 HOTSPOT_JNI_NEWDIRECTBYTEBUFFER_ENTRY(env, address, capacity);
3348
3349 if (!directBufferSupportInitializeEnded) {
3350 if (!initializeDirectBufferSupport(env, thread)) {
3351 HOTSPOT_JNI_NEWDIRECTBYTEBUFFER_RETURN(NULL);
3352 return NULL;
3353 }
3354 }
3355
3356 // Being paranoid about accidental sign extension on address
3357 jlong addr = (jlong) ((uintptr_t) address);
3358 // NOTE that package-private DirectByteBuffer constructor currently
3359 // takes int capacity
3360 jint cap = (jint) capacity;
3361 jobject ret = env->NewObject(directByteBufferClass, directByteBufferConstructor, addr, cap);
3362 HOTSPOT_JNI_NEWDIRECTBYTEBUFFER_RETURN(ret);
3363 return ret;
3364 }
3365
3366 DT_RETURN_MARK_DECL(GetDirectBufferAddress, void*
3367 , HOTSPOT_JNI_GETDIRECTBUFFERADDRESS_RETURN((void*) _ret_ref));
3368
3369 extern "C" void* JNICALL jni_GetDirectBufferAddress(JNIEnv *env, jobject buf)
3370 {
3371 // thread_from_jni_environment() will block if VM is gone.
3372 JavaThread* thread = JavaThread::thread_from_jni_environment(env);
3373
3374 JNIWrapper("jni_GetDirectBufferAddress");
3375 HOTSPOT_JNI_GETDIRECTBUFFERADDRESS_ENTRY(env, buf);
3376 void* ret = NULL;
3377 DT_RETURN_MARK(GetDirectBufferAddress, void*, (const void*&)ret);
3378
3379 if (!directBufferSupportInitializeEnded) {
3380 if (!initializeDirectBufferSupport(env, thread)) {
3381 return 0;
3382 }
3383 }
3384
3385 if ((buf != NULL) && (!env->IsInstanceOf(buf, directBufferClass))) {
3386 return 0;
3387 }
3388
3389 ret = (void*)(intptr_t)env->GetLongField(buf, directBufferAddressField);
3390 return ret;
3391 }
3392
3393 DT_RETURN_MARK_DECL(GetDirectBufferCapacity, jlong
3394 , HOTSPOT_JNI_GETDIRECTBUFFERCAPACITY_RETURN(_ret_ref));
3395
3396 extern "C" jlong JNICALL jni_GetDirectBufferCapacity(JNIEnv *env, jobject buf)
3397 {
3398 // thread_from_jni_environment() will block if VM is gone.
3399 JavaThread* thread = JavaThread::thread_from_jni_environment(env);
3400
3401 JNIWrapper("jni_GetDirectBufferCapacity");
3402 HOTSPOT_JNI_GETDIRECTBUFFERCAPACITY_ENTRY(env, buf);
3403 jlong ret = -1;
3404 DT_RETURN_MARK(GetDirectBufferCapacity, jlong, (const jlong&)ret);
3405
3406 if (!directBufferSupportInitializeEnded) {
3407 if (!initializeDirectBufferSupport(env, thread)) {
3408 ret = 0;
3409 return ret;
3410 }
3411 }
3412
3413 if (buf == NULL) {
3414 return -1;
3415 }
3416
3417 if (!env->IsInstanceOf(buf, directBufferClass)) {
3418 return -1;
3419 }
3420
3421 // NOTE that capacity is currently an int in the implementation
3422 ret = env->GetIntField(buf, bufferCapacityField);
3423 return ret;
3424 }
3425
3426
3427 JNI_LEAF(jint, jni_GetVersion(JNIEnv *env))
3428 JNIWrapper("GetVersion");
3429 HOTSPOT_JNI_GETVERSION_ENTRY(env);
3430 HOTSPOT_JNI_GETVERSION_RETURN(CurrentVersion);
3431 return CurrentVersion;
3432 JNI_END
3433
3434 extern struct JavaVM_ main_vm;
3435
3436 JNI_LEAF(jint, jni_GetJavaVM(JNIEnv *env, JavaVM **vm))
3437 JNIWrapper("jni_GetJavaVM");
3438 HOTSPOT_JNI_GETJAVAVM_ENTRY(env, (void **) vm);
3439 *vm = (JavaVM *)(&main_vm);
3440 HOTSPOT_JNI_GETJAVAVM_RETURN(JNI_OK);
3441 return JNI_OK;
3442 JNI_END
3443
3444 // Structure containing all jni functions
3445 struct JNINativeInterface_ jni_NativeInterface = {
3446 NULL,
3447 NULL,
3448 NULL,
3449
3450 NULL,
3451
3452 jni_GetVersion,
3453
3454 jni_DefineClass,
3455 jni_FindClass,
3456
3457 jni_FromReflectedMethod,
3458 jni_FromReflectedField,
3459
3460 jni_ToReflectedMethod,
3461
3462 jni_GetSuperclass,
3463 jni_IsAssignableFrom,
3464
3465 jni_ToReflectedField,
3466
3467 jni_Throw,
3468 jni_ThrowNew,
3469 jni_ExceptionOccurred,
3470 jni_ExceptionDescribe,
3471 jni_ExceptionClear,
3472 jni_FatalError,
3473
3474 jni_PushLocalFrame,
3475 jni_PopLocalFrame,
3476
3477 jni_NewGlobalRef,
3478 jni_DeleteGlobalRef,
3479 jni_DeleteLocalRef,
3480 jni_IsSameObject,
3481
3482 jni_NewLocalRef,
3483 jni_EnsureLocalCapacity,
3484
3485 jni_AllocObject,
3486 jni_NewObject,
3487 jni_NewObjectV,
3488 jni_NewObjectA,
3489
3490 jni_GetObjectClass,
3491 jni_IsInstanceOf,
3492
3493 jni_GetMethodID,
3494
3495 jni_CallObjectMethod,
3496 jni_CallObjectMethodV,
3497 jni_CallObjectMethodA,
3498 jni_CallBooleanMethod,
3499 jni_CallBooleanMethodV,
3500 jni_CallBooleanMethodA,
3501 jni_CallByteMethod,
3502 jni_CallByteMethodV,
3503 jni_CallByteMethodA,
3504 jni_CallCharMethod,
3505 jni_CallCharMethodV,
3506 jni_CallCharMethodA,
3507 jni_CallShortMethod,
3508 jni_CallShortMethodV,
3509 jni_CallShortMethodA,
3510 jni_CallIntMethod,
3511 jni_CallIntMethodV,
3512 jni_CallIntMethodA,
3513 jni_CallLongMethod,
3514 jni_CallLongMethodV,
3515 jni_CallLongMethodA,
3516 jni_CallFloatMethod,
3517 jni_CallFloatMethodV,
3518 jni_CallFloatMethodA,
3519 jni_CallDoubleMethod,
3520 jni_CallDoubleMethodV,
3521 jni_CallDoubleMethodA,
3522 jni_CallVoidMethod,
3523 jni_CallVoidMethodV,
3524 jni_CallVoidMethodA,
3525
3526 jni_CallNonvirtualObjectMethod,
3527 jni_CallNonvirtualObjectMethodV,
3528 jni_CallNonvirtualObjectMethodA,
3529 jni_CallNonvirtualBooleanMethod,
3530 jni_CallNonvirtualBooleanMethodV,
3531 jni_CallNonvirtualBooleanMethodA,
3532 jni_CallNonvirtualByteMethod,
3533 jni_CallNonvirtualByteMethodV,
3534 jni_CallNonvirtualByteMethodA,
3535 jni_CallNonvirtualCharMethod,
3536 jni_CallNonvirtualCharMethodV,
3537 jni_CallNonvirtualCharMethodA,
3538 jni_CallNonvirtualShortMethod,
3539 jni_CallNonvirtualShortMethodV,
3540 jni_CallNonvirtualShortMethodA,
3541 jni_CallNonvirtualIntMethod,
3542 jni_CallNonvirtualIntMethodV,
3543 jni_CallNonvirtualIntMethodA,
3544 jni_CallNonvirtualLongMethod,
3545 jni_CallNonvirtualLongMethodV,
3546 jni_CallNonvirtualLongMethodA,
3547 jni_CallNonvirtualFloatMethod,
3548 jni_CallNonvirtualFloatMethodV,
3549 jni_CallNonvirtualFloatMethodA,
3550 jni_CallNonvirtualDoubleMethod,
3551 jni_CallNonvirtualDoubleMethodV,
3552 jni_CallNonvirtualDoubleMethodA,
3553 jni_CallNonvirtualVoidMethod,
3554 jni_CallNonvirtualVoidMethodV,
3555 jni_CallNonvirtualVoidMethodA,
3556
3557 jni_GetFieldID,
3558
3559 jni_GetObjectField,
3560 jni_GetBooleanField,
3561 jni_GetByteField,
3562 jni_GetCharField,
3563 jni_GetShortField,
3564 jni_GetIntField,
3565 jni_GetLongField,
3566 jni_GetFloatField,
3567 jni_GetDoubleField,
3568
3569 jni_SetObjectField,
3570 jni_SetBooleanField,
3571 jni_SetByteField,
3572 jni_SetCharField,
3573 jni_SetShortField,
3574 jni_SetIntField,
3575 jni_SetLongField,
3576 jni_SetFloatField,
3577 jni_SetDoubleField,
3578
3579 jni_GetStaticMethodID,
3580
3581 jni_CallStaticObjectMethod,
3582 jni_CallStaticObjectMethodV,
3583 jni_CallStaticObjectMethodA,
3584 jni_CallStaticBooleanMethod,
3585 jni_CallStaticBooleanMethodV,
3586 jni_CallStaticBooleanMethodA,
3587 jni_CallStaticByteMethod,
3588 jni_CallStaticByteMethodV,
3589 jni_CallStaticByteMethodA,
3590 jni_CallStaticCharMethod,
3591 jni_CallStaticCharMethodV,
3592 jni_CallStaticCharMethodA,
3593 jni_CallStaticShortMethod,
3594 jni_CallStaticShortMethodV,
3595 jni_CallStaticShortMethodA,
3596 jni_CallStaticIntMethod,
3597 jni_CallStaticIntMethodV,
3598 jni_CallStaticIntMethodA,
3599 jni_CallStaticLongMethod,
3600 jni_CallStaticLongMethodV,
3601 jni_CallStaticLongMethodA,
3602 jni_CallStaticFloatMethod,
3603 jni_CallStaticFloatMethodV,
3604 jni_CallStaticFloatMethodA,
3605 jni_CallStaticDoubleMethod,
3606 jni_CallStaticDoubleMethodV,
3607 jni_CallStaticDoubleMethodA,
3608 jni_CallStaticVoidMethod,
3609 jni_CallStaticVoidMethodV,
3610 jni_CallStaticVoidMethodA,
3611
3612 jni_GetStaticFieldID,
3613
3614 jni_GetStaticObjectField,
3615 jni_GetStaticBooleanField,
3616 jni_GetStaticByteField,
3617 jni_GetStaticCharField,
3618 jni_GetStaticShortField,
3619 jni_GetStaticIntField,
3620 jni_GetStaticLongField,
3621 jni_GetStaticFloatField,
3622 jni_GetStaticDoubleField,
3623
3624 jni_SetStaticObjectField,
3625 jni_SetStaticBooleanField,
3626 jni_SetStaticByteField,
3627 jni_SetStaticCharField,
3628 jni_SetStaticShortField,
3629 jni_SetStaticIntField,
3630 jni_SetStaticLongField,
3631 jni_SetStaticFloatField,
3632 jni_SetStaticDoubleField,
3633
3634 jni_NewString,
3635 jni_GetStringLength,
3636 jni_GetStringChars,
3637 jni_ReleaseStringChars,
3638
3639 jni_NewStringUTF,
3640 jni_GetStringUTFLength,
3641 jni_GetStringUTFChars,
3642 jni_ReleaseStringUTFChars,
3643
3644 jni_GetArrayLength,
3645
3646 jni_NewObjectArray,
3647 jni_GetObjectArrayElement,
3648 jni_SetObjectArrayElement,
3649
3650 jni_NewBooleanArray,
3651 jni_NewByteArray,
3652 jni_NewCharArray,
3653 jni_NewShortArray,
3654 jni_NewIntArray,
3655 jni_NewLongArray,
3656 jni_NewFloatArray,
3657 jni_NewDoubleArray,
3658
3659 jni_GetBooleanArrayElements,
3660 jni_GetByteArrayElements,
3661 jni_GetCharArrayElements,
3662 jni_GetShortArrayElements,
3663 jni_GetIntArrayElements,
3664 jni_GetLongArrayElements,
3665 jni_GetFloatArrayElements,
3666 jni_GetDoubleArrayElements,
3667
3668 jni_ReleaseBooleanArrayElements,
3669 jni_ReleaseByteArrayElements,
3670 jni_ReleaseCharArrayElements,
3671 jni_ReleaseShortArrayElements,
3672 jni_ReleaseIntArrayElements,
3673 jni_ReleaseLongArrayElements,
3674 jni_ReleaseFloatArrayElements,
3675 jni_ReleaseDoubleArrayElements,
3676
3677 jni_GetBooleanArrayRegion,
3678 jni_GetByteArrayRegion,
3679 jni_GetCharArrayRegion,
3680 jni_GetShortArrayRegion,
3681 jni_GetIntArrayRegion,
3682 jni_GetLongArrayRegion,
3683 jni_GetFloatArrayRegion,
3684 jni_GetDoubleArrayRegion,
3685
3686 jni_SetBooleanArrayRegion,
3687 jni_SetByteArrayRegion,
3688 jni_SetCharArrayRegion,
3689 jni_SetShortArrayRegion,
3690 jni_SetIntArrayRegion,
3691 jni_SetLongArrayRegion,
3692 jni_SetFloatArrayRegion,
3693 jni_SetDoubleArrayRegion,
3694
3695 jni_RegisterNatives,
3696 jni_UnregisterNatives,
3697
3698 jni_MonitorEnter,
3699 jni_MonitorExit,
3700
3701 jni_GetJavaVM,
3702
3703 jni_GetStringRegion,
3704 jni_GetStringUTFRegion,
3705
3706 jni_GetPrimitiveArrayCritical,
3707 jni_ReleasePrimitiveArrayCritical,
3708
3709 jni_GetStringCritical,
3710 jni_ReleaseStringCritical,
3711
3712 jni_NewWeakGlobalRef,
3713 jni_DeleteWeakGlobalRef,
3714
3715 jni_ExceptionCheck,
3716
3717 jni_NewDirectByteBuffer,
3718 jni_GetDirectBufferAddress,
3719 jni_GetDirectBufferCapacity,
3720
3721 // New 1_6 features
3722
3723 jni_GetObjectRefType
3724 };
3725
3726
3727 // For jvmti use to modify jni function table.
3728 // Java threads in native contiues to run until it is transitioned
3729 // to VM at safepoint. Before the transition or before it is blocked
3730 // for safepoint it may access jni function table. VM could crash if
3731 // any java thread access the jni function table in the middle of memcpy.
3732 // To avoid this each function pointers are copied automically.
3733 void copy_jni_function_table(const struct JNINativeInterface_ *new_jni_NativeInterface) {
3734 assert(SafepointSynchronize::is_at_safepoint(), "must be at safepoint");
3735 intptr_t *a = (intptr_t *) jni_functions();
3736 intptr_t *b = (intptr_t *) new_jni_NativeInterface;
3737 for (uint i=0; i < sizeof(struct JNINativeInterface_)/sizeof(void *); i++) {
3738 Atomic::store_ptr(*b++, a++);
3739 }
3740 }
3741
3742 void quicken_jni_functions() {
3743 // Replace Get<Primitive>Field with fast versions
3744 if (UseFastJNIAccessors && !JvmtiExport::can_post_field_access()
3745 && !VerifyJNIFields && !TraceJNICalls && !CountJNICalls && !CheckJNICalls
3746 #if defined(_WINDOWS) && defined(IA32) && defined(COMPILER2)
3747 // windows x86 currently needs SEH wrapper and the gain of the fast
3748 // versions currently isn't certain for server vm on uniprocessor.
3749 && os::is_MP()
3750 #endif
3751 ) {
3752 address func;
3753 func = JNI_FastGetField::generate_fast_get_boolean_field();
3754 if (func != (address)-1) {
3755 jni_NativeInterface.GetBooleanField = (GetBooleanField_t)func;
3756 }
3757 func = JNI_FastGetField::generate_fast_get_byte_field();
3758 if (func != (address)-1) {
3759 jni_NativeInterface.GetByteField = (GetByteField_t)func;
3760 }
3761 func = JNI_FastGetField::generate_fast_get_char_field();
3762 if (func != (address)-1) {
3763 jni_NativeInterface.GetCharField = (GetCharField_t)func;
3764 }
3765 func = JNI_FastGetField::generate_fast_get_short_field();
3766 if (func != (address)-1) {
3767 jni_NativeInterface.GetShortField = (GetShortField_t)func;
3768 }
3769 func = JNI_FastGetField::generate_fast_get_int_field();
3770 if (func != (address)-1) {
3771 jni_NativeInterface.GetIntField = (GetIntField_t)func;
3772 }
3773 func = JNI_FastGetField::generate_fast_get_long_field();
3774 if (func != (address)-1) {
3775 jni_NativeInterface.GetLongField = (GetLongField_t)func;
3776 }
3777 func = JNI_FastGetField::generate_fast_get_float_field();
3778 if (func != (address)-1) {
3779 jni_NativeInterface.GetFloatField = (GetFloatField_t)func;
3780 }
3781 func = JNI_FastGetField::generate_fast_get_double_field();
3782 if (func != (address)-1) {
3783 jni_NativeInterface.GetDoubleField = (GetDoubleField_t)func;
3784 }
3785 }
3786 }
3787
3788 // Returns the function structure
3789 struct JNINativeInterface_* jni_functions() {
3790 #if INCLUDE_JNI_CHECK
3791 if (CheckJNICalls) return jni_functions_check();
3792 #endif // INCLUDE_JNI_CHECK
3793 return &jni_NativeInterface;
3794 }
3795
3796 // Returns the function structure
3797 struct JNINativeInterface_* jni_functions_nocheck() {
3798 return &jni_NativeInterface;
3799 }
3800
3801
3802 // Invocation API
3803
3804
3805 // Forward declaration
3806 extern const struct JNIInvokeInterface_ jni_InvokeInterface;
3807
3808 // Global invocation API vars
3809 volatile jint vm_created = 0;
3810 // Indicate whether it is safe to recreate VM
3811 volatile jint safe_to_recreate_vm = 1;
3812 struct JavaVM_ main_vm = {&jni_InvokeInterface};
3813
3814
3815 #define JAVASTACKSIZE (400 * 1024) /* Default size of a thread java stack */
3816 enum { VERIFY_NONE, VERIFY_REMOTE, VERIFY_ALL };
3817
3818 DT_RETURN_MARK_DECL(GetDefaultJavaVMInitArgs, jint
3819 , HOTSPOT_JNI_GETDEFAULTJAVAVMINITARGS_RETURN(_ret_ref));
3820
3821 _JNI_IMPORT_OR_EXPORT_ jint JNICALL JNI_GetDefaultJavaVMInitArgs(void *args_) {
3822 HOTSPOT_JNI_GETDEFAULTJAVAVMINITARGS_ENTRY(args_);
3823 JDK1_1InitArgs *args = (JDK1_1InitArgs *)args_;
3824 jint ret = JNI_ERR;
3825 DT_RETURN_MARK(GetDefaultJavaVMInitArgs, jint, (const jint&)ret);
3826
3827 if (Threads::is_supported_jni_version(args->version)) {
3828 ret = JNI_OK;
3829 }
3830 // 1.1 style no longer supported in hotspot.
3831 // According the JNI spec, we should update args->version on return.
3832 // We also use the structure to communicate with launcher about default
3833 // stack size.
3834 if (args->version == JNI_VERSION_1_1) {
3835 args->version = JNI_VERSION_1_2;
3836 // javaStackSize is int in arguments structure
3837 assert(jlong(ThreadStackSize) * K < INT_MAX, "integer overflow");
3838 args->javaStackSize = (jint)(ThreadStackSize * K);
3839 }
3840 return ret;
3841 }
3842
3843 #ifndef PRODUCT
3844
3845 #include "gc/shared/collectedHeap.hpp"
3846 #include "gc/shared/gcTimer.hpp"
3847 #if INCLUDE_ALL_GCS
3848 #include "gc/g1/heapRegionRemSet.hpp"
3849 #endif
3850 #include "memory/guardedMemory.hpp"
3851 #include "utilities/ostream.hpp"
3852 #include "utilities/quickSort.hpp"
3853 #if INCLUDE_VM_STRUCTS
3854 #include "runtime/vmStructs.hpp"
3855 #endif
3856
3857 #define run_unit_test(unit_test_function_call) \
3858 tty->print_cr("Running test: " #unit_test_function_call); \
3859 unit_test_function_call
3860
3861 // Forward declaration
3862 void TestOS_test();
3863 void TestReservedSpace_test();
3864 void TestReserveMemorySpecial_test();
3865 void TestVirtualSpace_test();
3866 void TestMetaspaceAux_test();
3867 void TestMetachunk_test();
3868 void TestVirtualSpaceNode_test();
3869 void TestNewSize_test();
3870 void TestOldSize_test();
3871 void TestKlass_test();
3872 void TestBitMap_test();
3873 void TestAsUtf8();
3874 void Test_linked_list();
3875 void TestChunkedList_test();
3876 #if INCLUDE_ALL_GCS
3877 void TestOldFreeSpaceCalculation_test();
3878 void TestG1BiasedArray_test();
3879 void TestBufferingOopClosure_test();
3880 void TestCodeCacheRemSet_test();
3881 void FreeRegionList_test();
3882 #endif
3883
3884 void execute_internal_vm_tests() {
3885 if (ExecuteInternalVMTests) {
3886 tty->print_cr("Running internal VM tests");
3887 run_unit_test(TestOS_test());
3888 run_unit_test(TestReservedSpace_test());
3889 run_unit_test(TestReserveMemorySpecial_test());
3890 run_unit_test(TestVirtualSpace_test());
3891 run_unit_test(TestMetaspaceAux_test());
3892 run_unit_test(TestMetachunk_test());
3893 run_unit_test(TestVirtualSpaceNode_test());
3894 run_unit_test(GlobalDefinitions::test_globals());
3895 run_unit_test(GCTimerAllTest::all());
3896 run_unit_test(arrayOopDesc::test_max_array_length());
3897 run_unit_test(CollectedHeap::test_is_in());
3898 run_unit_test(QuickSort::test_quick_sort());
3899 run_unit_test(GuardedMemory::test_guarded_memory());
3900 run_unit_test(AltHashing::test_alt_hash());
3901 run_unit_test(test_loggc_filename());
3902 run_unit_test(TestNewSize_test());
3903 run_unit_test(TestOldSize_test());
3904 run_unit_test(TestKlass_test());
3905 run_unit_test(TestBitMap_test());
3906 run_unit_test(TestAsUtf8());
3907 run_unit_test(ObjectMonitor::sanity_checks());
3908 run_unit_test(Test_linked_list());
3909 run_unit_test(TestChunkedList_test());
3910 #if INCLUDE_VM_STRUCTS
3911 run_unit_test(VMStructs::test());
3912 #endif
3913 #if INCLUDE_ALL_GCS
3914 run_unit_test(TestOldFreeSpaceCalculation_test());
3915 run_unit_test(TestG1BiasedArray_test());
3916 run_unit_test(HeapRegionRemSet::test_prt());
3917 run_unit_test(TestBufferingOopClosure_test());
3918 run_unit_test(TestCodeCacheRemSet_test());
3919 if (UseG1GC) {
3920 run_unit_test(FreeRegionList_test());
3921 }
3922 #endif
3923 tty->print_cr("All internal VM tests passed");
3924 }
3925 }
3926
3927 #undef run_unit_test
3928
3929 #endif
3930
3931 DT_RETURN_MARK_DECL(CreateJavaVM, jint
3932 , HOTSPOT_JNI_CREATEJAVAVM_RETURN(_ret_ref));
3933
3934 static jint JNI_CreateJavaVM_inner(JavaVM **vm, void **penv, void *args) {
3935 HOTSPOT_JNI_CREATEJAVAVM_ENTRY((void **) vm, penv, args);
3936
3937 jint result = JNI_ERR;
3938 DT_RETURN_MARK(CreateJavaVM, jint, (const jint&)result);
3939
3940 // We're about to use Atomic::xchg for synchronization. Some Zero
3941 // platforms use the GCC builtin __sync_lock_test_and_set for this,
3942 // but __sync_lock_test_and_set is not guaranteed to do what we want
3943 // on all architectures. So we check it works before relying on it.
3944 #if defined(ZERO) && defined(ASSERT)
3945 {
3946 jint a = 0xcafebabe;
3947 jint b = Atomic::xchg(0xdeadbeef, &a);
3948 void *c = &a;
3949 void *d = Atomic::xchg_ptr(&b, &c);
3950 assert(a == (jint) 0xdeadbeef && b == (jint) 0xcafebabe, "Atomic::xchg() works");
3951 assert(c == &b && d == &a, "Atomic::xchg_ptr() works");
3952 }
3953 #endif // ZERO && ASSERT
3954
3955 // At the moment it's only possible to have one Java VM,
3956 // since some of the runtime state is in global variables.
3957
3958 // We cannot use our mutex locks here, since they only work on
3959 // Threads. We do an atomic compare and exchange to ensure only
3960 // one thread can call this method at a time
3961
3962 // We use Atomic::xchg rather than Atomic::add/dec since on some platforms
3963 // the add/dec implementations are dependent on whether we are running
3964 // on a multiprocessor, and at this stage of initialization the os::is_MP
3965 // function used to determine this will always return false. Atomic::xchg
3966 // does not have this problem.
3967 if (Atomic::xchg(1, &vm_created) == 1) {
3968 return JNI_EEXIST; // already created, or create attempt in progress
3969 }
3970 if (Atomic::xchg(0, &safe_to_recreate_vm) == 0) {
3971 return JNI_ERR; // someone tried and failed and retry not allowed.
3972 }
3973
3974 assert(vm_created == 1, "vm_created is true during the creation");
3975
3976 /**
3977 * Certain errors during initialization are recoverable and do not
3978 * prevent this method from being called again at a later time
3979 * (perhaps with different arguments). However, at a certain
3980 * point during initialization if an error occurs we cannot allow
3981 * this function to be called again (or it will crash). In those
3982 * situations, the 'canTryAgain' flag is set to false, which atomically
3983 * sets safe_to_recreate_vm to 1, such that any new call to
3984 * JNI_CreateJavaVM will immediately fail using the above logic.
3985 */
3986 bool can_try_again = true;
3987
3988 result = Threads::create_vm((JavaVMInitArgs*) args, &can_try_again);
3989 if (result == JNI_OK) {
3990 JavaThread *thread = JavaThread::current();
3991 assert(!thread->has_pending_exception(), "should have returned not OK");
3992 /* thread is thread_in_vm here */
3993 *vm = (JavaVM *)(&main_vm);
3994 *(JNIEnv**)penv = thread->jni_environment();
3995
3996 // Tracks the time application was running before GC
3997 RuntimeService::record_application_start();
3998
3999 // Notify JVMTI
4000 if (JvmtiExport::should_post_thread_life()) {
4001 JvmtiExport::post_thread_start(thread);
4002 }
4003
4004 EventThreadStart event;
4005 if (event.should_commit()) {
4006 event.set_javalangthread(java_lang_Thread::thread_id(thread->threadObj()));
4007 event.commit();
4008 }
4009
4010 #ifndef PRODUCT
4011 // Check if we should compile all classes on bootclasspath
4012 if (CompileTheWorld) ClassLoader::compile_the_world();
4013 if (ReplayCompiles) ciReplay::replay(thread);
4014
4015 // Some platforms (like Win*) need a wrapper around these test
4016 // functions in order to properly handle error conditions.
4017 test_error_handler();
4018 execute_internal_vm_tests();
4019 #endif
4020
4021 // Since this is not a JVM_ENTRY we have to set the thread state manually before leaving.
4022 ThreadStateTransition::transition_and_fence(thread, _thread_in_vm, _thread_in_native);
4023 } else {
4024 // If create_vm exits because of a pending exception, exit with that
4025 // exception. In the future when we figure out how to reclaim memory,
4026 // we may be able to exit with JNI_ERR and allow the calling application
4027 // to continue.
4028 if (Universe::is_fully_initialized()) {
4029 // otherwise no pending exception possible - VM will already have aborted
4030 JavaThread* THREAD = JavaThread::current();
4031 if (HAS_PENDING_EXCEPTION) {
4032 HandleMark hm;
4033 vm_exit_during_initialization(Handle(THREAD, PENDING_EXCEPTION));
4034 }
4035 }
4036
4037 if (can_try_again) {
4038 // reset safe_to_recreate_vm to 1 so that retrial would be possible
4039 safe_to_recreate_vm = 1;
4040 }
4041
4042 // Creation failed. We must reset vm_created
4043 *vm = 0;
4044 *(JNIEnv**)penv = 0;
4045 // reset vm_created last to avoid race condition. Use OrderAccess to
4046 // control both compiler and architectural-based reordering.
4047 OrderAccess::release_store(&vm_created, 0);
4048 }
4049
4050 return result;
4051
4052 }
4053
4054 _JNI_IMPORT_OR_EXPORT_ jint JNICALL JNI_CreateJavaVM(JavaVM **vm, void **penv, void *args) {
4055 jint result = 0;
4056 // On Windows, let CreateJavaVM run with SEH protection
4057 #ifdef _WIN32
4058 __try {
4059 #endif
4060 result = JNI_CreateJavaVM_inner(vm, penv, args);
4061 #ifdef _WIN32
4062 } __except(topLevelExceptionFilter((_EXCEPTION_POINTERS*)_exception_info())) {
4063 // Nothing to do.
4064 }
4065 #endif
4066 return result;
4067 }
4068
4069 _JNI_IMPORT_OR_EXPORT_ jint JNICALL JNI_GetCreatedJavaVMs(JavaVM **vm_buf, jsize bufLen, jsize *numVMs) {
4070 // See bug 4367188, the wrapper can sometimes cause VM crashes
4071 // JNIWrapper("GetCreatedJavaVMs");
4072
4073 HOTSPOT_JNI_GETCREATEDJAVAVMS_ENTRY((void **) vm_buf, bufLen, (uintptr_t *) numVMs);
4074
4075 if (vm_created) {
4076 if (numVMs != NULL) *numVMs = 1;
4077 if (bufLen > 0) *vm_buf = (JavaVM *)(&main_vm);
4078 } else {
4079 if (numVMs != NULL) *numVMs = 0;
4080 }
4081 HOTSPOT_JNI_GETCREATEDJAVAVMS_RETURN(JNI_OK);
4082 return JNI_OK;
4083 }
4084
4085 extern "C" {
4086
4087 DT_RETURN_MARK_DECL(DestroyJavaVM, jint
4088 , HOTSPOT_JNI_DESTROYJAVAVM_RETURN(_ret_ref));
4089
4090 jint JNICALL jni_DestroyJavaVM(JavaVM *vm) {
4091 HOTSPOT_JNI_DESTROYJAVAVM_ENTRY(vm);
4092 jint res = JNI_ERR;
4093 DT_RETURN_MARK(DestroyJavaVM, jint, (const jint&)res);
4094
4095 if (!vm_created) {
4096 res = JNI_ERR;
4097 return res;
4098 }
4099
4100 JNIWrapper("DestroyJavaVM");
4101 JNIEnv *env;
4102 JavaVMAttachArgs destroyargs;
4103 destroyargs.version = CurrentVersion;
4104 destroyargs.name = (char *)"DestroyJavaVM";
4105 destroyargs.group = NULL;
4106 res = vm->AttachCurrentThread((void **)&env, (void *)&destroyargs);
4107 if (res != JNI_OK) {
4108 return res;
4109 }
4110
4111 // Since this is not a JVM_ENTRY we have to set the thread state manually before entering.
4112 JavaThread* thread = JavaThread::current();
4113 ThreadStateTransition::transition_from_native(thread, _thread_in_vm);
4114 if (Threads::destroy_vm()) {
4115 // Should not change thread state, VM is gone
4116 vm_created = false;
4117 res = JNI_OK;
4118 return res;
4119 } else {
4120 ThreadStateTransition::transition_and_fence(thread, _thread_in_vm, _thread_in_native);
4121 res = JNI_ERR;
4122 return res;
4123 }
4124 }
4125
4126
4127 static jint attach_current_thread(JavaVM *vm, void **penv, void *_args, bool daemon) {
4128 JavaVMAttachArgs *args = (JavaVMAttachArgs *) _args;
4129
4130 // Check below commented out from JDK1.2fcs as well
4131 /*
4132 if (args && (args->version != JNI_VERSION_1_1 || args->version != JNI_VERSION_1_2)) {
4133 return JNI_EVERSION;
4134 }
4135 */
4136
4137 Thread* t = ThreadLocalStorage::get_thread_slow();
4138 if (t != NULL) {
4139 // If the thread has been attached this operation is a no-op
4140 *(JNIEnv**)penv = ((JavaThread*) t)->jni_environment();
4141 return JNI_OK;
4142 }
4143
4144 // Create a thread and mark it as attaching so it will be skipped by the
4145 // ThreadsListEnumerator - see CR 6404306
4146 JavaThread* thread = new JavaThread(true);
4147
4148 // Set correct safepoint info. The thread is going to call into Java when
4149 // initializing the Java level thread object. Hence, the correct state must
4150 // be set in order for the Safepoint code to deal with it correctly.
4151 thread->set_thread_state(_thread_in_vm);
4152 // Must do this before initialize_thread_local_storage
4153 thread->record_stack_base_and_size();
4154
4155 thread->initialize_thread_local_storage();
4156
4157 if (!os::create_attached_thread(thread)) {
4158 delete thread;
4159 return JNI_ERR;
4160 }
4161 // Enable stack overflow checks
4162 thread->create_stack_guard_pages();
4163
4164 thread->initialize_tlab();
4165
4166 thread->cache_global_variables();
4167
4168 // Crucial that we do not have a safepoint check for this thread, since it has
4169 // not been added to the Thread list yet.
4170 { Threads_lock->lock_without_safepoint_check();
4171 // This must be inside this lock in order to get FullGCALot to work properly, i.e., to
4172 // avoid this thread trying to do a GC before it is added to the thread-list
4173 thread->set_active_handles(JNIHandleBlock::allocate_block());
4174 Threads::add(thread, daemon);
4175 Threads_lock->unlock();
4176 }
4177 // Create thread group and name info from attach arguments
4178 oop group = NULL;
4179 char* thread_name = NULL;
4180 if (args != NULL && Threads::is_supported_jni_version(args->version)) {
4181 group = JNIHandles::resolve(args->group);
4182 thread_name = args->name; // may be NULL
4183 }
4184 if (group == NULL) group = Universe::main_thread_group();
4185
4186 // Create Java level thread object and attach it to this thread
4187 bool attach_failed = false;
4188 {
4189 EXCEPTION_MARK;
4190 HandleMark hm(THREAD);
4191 Handle thread_group(THREAD, group);
4192 thread->allocate_threadObj(thread_group, thread_name, daemon, THREAD);
4193 if (HAS_PENDING_EXCEPTION) {
4194 CLEAR_PENDING_EXCEPTION;
4195 // cleanup outside the handle mark.
4196 attach_failed = true;
4197 }
4198 }
4199
4200 if (attach_failed) {
4201 // Added missing cleanup
4202 thread->cleanup_failed_attach_current_thread();
4203 return JNI_ERR;
4204 }
4205
4206 // mark the thread as no longer attaching
4207 // this uses a fence to push the change through so we don't have
4208 // to regrab the threads_lock
4209 thread->set_done_attaching_via_jni();
4210
4211 // Set java thread status.
4212 java_lang_Thread::set_thread_status(thread->threadObj(),
4213 java_lang_Thread::RUNNABLE);
4214
4215 // Notify the debugger
4216 if (JvmtiExport::should_post_thread_life()) {
4217 JvmtiExport::post_thread_start(thread);
4218 }
4219
4220 EventThreadStart event;
4221 if (event.should_commit()) {
4222 event.set_javalangthread(java_lang_Thread::thread_id(thread->threadObj()));
4223 event.commit();
4224 }
4225
4226 *(JNIEnv**)penv = thread->jni_environment();
4227
4228 // Now leaving the VM, so change thread_state. This is normally automatically taken care
4229 // of in the JVM_ENTRY. But in this situation we have to do it manually. Notice, that by
4230 // using ThreadStateTransition::transition, we do a callback to the safepoint code if
4231 // needed.
4232
4233 ThreadStateTransition::transition_and_fence(thread, _thread_in_vm, _thread_in_native);
4234
4235 // Perform any platform dependent FPU setup
4236 os::setup_fpu();
4237
4238 return JNI_OK;
4239 }
4240
4241
4242 jint JNICALL jni_AttachCurrentThread(JavaVM *vm, void **penv, void *_args) {
4243 HOTSPOT_JNI_ATTACHCURRENTTHREAD_ENTRY(vm, penv, _args);
4244 if (!vm_created) {
4245 HOTSPOT_JNI_ATTACHCURRENTTHREAD_RETURN((uint32_t) JNI_ERR);
4246 return JNI_ERR;
4247 }
4248
4249 JNIWrapper("AttachCurrentThread");
4250 jint ret = attach_current_thread(vm, penv, _args, false);
4251 HOTSPOT_JNI_ATTACHCURRENTTHREAD_RETURN(ret);
4252 return ret;
4253 }
4254
4255
4256 jint JNICALL jni_DetachCurrentThread(JavaVM *vm) {
4257 HOTSPOT_JNI_DETACHCURRENTTHREAD_ENTRY(vm);
4258 VM_Exit::block_if_vm_exited();
4259
4260 JNIWrapper("DetachCurrentThread");
4261
4262 // If the thread has been deattacted the operations is a no-op
4263 if (ThreadLocalStorage::thread() == NULL) {
4264 HOTSPOT_JNI_DETACHCURRENTTHREAD_RETURN(JNI_OK);
4265 return JNI_OK;
4266 }
4267
4268 JavaThread* thread = JavaThread::current();
4269 if (thread->has_last_Java_frame()) {
4270 HOTSPOT_JNI_DETACHCURRENTTHREAD_RETURN((uint32_t) JNI_ERR);
4271 // Can't detach a thread that's running java, that can't work.
4272 return JNI_ERR;
4273 }
4274
4275 // Safepoint support. Have to do call-back to safepoint code, if in the
4276 // middel of a safepoint operation
4277 ThreadStateTransition::transition_from_native(thread, _thread_in_vm);
4278
4279 // XXX: Note that JavaThread::exit() call below removes the guards on the
4280 // stack pages set up via enable_stack_{red,yellow}_zone() calls
4281 // above in jni_AttachCurrentThread. Unfortunately, while the setting
4282 // of the guards is visible in jni_AttachCurrentThread above,
4283 // the removal of the guards is buried below in JavaThread::exit()
4284 // here. The abstraction should be more symmetrically either exposed
4285 // or hidden (e.g. it could probably be hidden in the same
4286 // (platform-dependent) methods where we do alternate stack
4287 // maintenance work?)
4288 thread->exit(false, JavaThread::jni_detach);
4289 delete thread;
4290
4291 HOTSPOT_JNI_DETACHCURRENTTHREAD_RETURN(JNI_OK);
4292 return JNI_OK;
4293 }
4294
4295 DT_RETURN_MARK_DECL(GetEnv, jint
4296 , HOTSPOT_JNI_GETENV_RETURN(_ret_ref));
4297
4298 jint JNICALL jni_GetEnv(JavaVM *vm, void **penv, jint version) {
4299 HOTSPOT_JNI_GETENV_ENTRY(vm, penv, version);
4300 jint ret = JNI_ERR;
4301 DT_RETURN_MARK(GetEnv, jint, (const jint&)ret);
4302
4303 if (!vm_created) {
4304 *penv = NULL;
4305 ret = JNI_EDETACHED;
4306 return ret;
4307 }
4308
4309 if (JniExportedInterface::GetExportedInterface(vm, penv, version, &ret)) {
4310 return ret;
4311 }
4312
4313 #ifndef JVMPI_VERSION_1
4314 // need these in order to be polite about older agents
4315 #define JVMPI_VERSION_1 ((jint)0x10000001)
4316 #define JVMPI_VERSION_1_1 ((jint)0x10000002)
4317 #define JVMPI_VERSION_1_2 ((jint)0x10000003)
4318 #endif // !JVMPI_VERSION_1
4319
4320 Thread* thread = ThreadLocalStorage::thread();
4321 if (thread != NULL && thread->is_Java_thread()) {
4322 if (Threads::is_supported_jni_version_including_1_1(version)) {
4323 *(JNIEnv**)penv = ((JavaThread*) thread)->jni_environment();
4324 ret = JNI_OK;
4325 return ret;
4326
4327 } else if (version == JVMPI_VERSION_1 ||
4328 version == JVMPI_VERSION_1_1 ||
4329 version == JVMPI_VERSION_1_2) {
4330 tty->print_cr("ERROR: JVMPI, an experimental interface, is no longer supported.");
4331 tty->print_cr("Please use the supported interface: the JVM Tool Interface (JVM TI).");
4332 ret = JNI_EVERSION;
4333 return ret;
4334 } else if (JvmtiExport::is_jvmdi_version(version)) {
4335 tty->print_cr("FATAL ERROR: JVMDI is no longer supported.");
4336 tty->print_cr("Please use the supported interface: the JVM Tool Interface (JVM TI).");
4337 ret = JNI_EVERSION;
4338 return ret;
4339 } else {
4340 *penv = NULL;
4341 ret = JNI_EVERSION;
4342 return ret;
4343 }
4344 } else {
4345 *penv = NULL;
4346 ret = JNI_EDETACHED;
4347 return ret;
4348 }
4349 }
4350
4351
4352 jint JNICALL jni_AttachCurrentThreadAsDaemon(JavaVM *vm, void **penv, void *_args) {
4353 HOTSPOT_JNI_ATTACHCURRENTTHREADASDAEMON_ENTRY(vm, penv, _args);
4354 if (!vm_created) {
4355 HOTSPOT_JNI_ATTACHCURRENTTHREADASDAEMON_RETURN((uint32_t) JNI_ERR);
4356 return JNI_ERR;
4357 }
4358
4359 JNIWrapper("AttachCurrentThreadAsDaemon");
4360 jint ret = attach_current_thread(vm, penv, _args, true);
4361 HOTSPOT_JNI_ATTACHCURRENTTHREADASDAEMON_RETURN(ret);
4362 return ret;
4363 }
4364
4365
4366 } // End extern "C"
4367
4368 const struct JNIInvokeInterface_ jni_InvokeInterface = {
4369 NULL,
4370 NULL,
4371 NULL,
4372
4373 jni_DestroyJavaVM,
4374 jni_AttachCurrentThread,
4375 jni_DetachCurrentThread,
4376 jni_GetEnv,
4377 jni_AttachCurrentThreadAsDaemon
4378 };