1 /*
2 * Copyright (c) 1997, 2014, 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 "interpreter/linkResolver.hpp"
35 #include "utilities/macros.hpp"
36 #if INCLUDE_ALL_GCS
37 #include "gc_implementation/g1/g1SATBCardTableModRefBS.hpp"
38 #endif // INCLUDE_ALL_GCS
39 #include "memory/allocation.hpp"
40 #include "memory/allocation.inline.hpp"
41 #include "memory/gcLocker.inline.hpp"
42 #include "memory/oopFactory.hpp"
43 #include "memory/universe.inline.hpp"
44 #include "oops/instanceKlass.hpp"
45 #include "oops/instanceOop.hpp"
46 #include "oops/markOop.hpp"
47 #include "oops/method.hpp"
48 #include "oops/objArrayKlass.hpp"
49 #include "oops/objArrayOop.hpp"
50 #include "oops/oop.inline.hpp"
51 #include "oops/symbol.hpp"
52 #include "oops/typeArrayKlass.hpp"
53 #include "oops/typeArrayOop.hpp"
54 #include "prims/jni.h"
55 #include "prims/jniCheck.hpp"
56 #include "prims/jniExport.hpp"
57 #include "prims/jniFastGetField.hpp"
58 #include "prims/jvm.h"
59 #include "prims/jvm_misc.hpp"
60 #include "prims/jvmtiExport.hpp"
61 #include "prims/jvmtiThreadState.hpp"
62 #include "runtime/compilationPolicy.hpp"
63 #include "runtime/fieldDescriptor.hpp"
64 #include "runtime/fprofiler.hpp"
65 #include "runtime/handles.inline.hpp"
66 #include "runtime/interfaceSupport.hpp"
67 #include "runtime/java.hpp"
68 #include "runtime/javaCalls.hpp"
69 #include "runtime/jfieldIDWorkaround.hpp"
70 #include "runtime/orderAccess.inline.hpp"
71 #include "runtime/reflection.hpp"
72 #include "runtime/sharedRuntime.hpp"
73 #include "runtime/signature.hpp"
74 #include "runtime/thread.inline.hpp"
75 #include "runtime/vm_operations.hpp"
76 #include "services/runtimeService.hpp"
77 #include "trace/tracing.hpp"
78 #include "utilities/defaultStream.hpp"
79 #include "utilities/dtrace.hpp"
80 #include "utilities/events.hpp"
81 #include "utilities/histogram.hpp"
82 #ifdef TARGET_OS_FAMILY_linux
83 # include "os_linux.inline.hpp"
84 #endif
85 #ifdef TARGET_OS_FAMILY_solaris
86 # include "os_solaris.inline.hpp"
87 #endif
88 #ifdef TARGET_OS_FAMILY_windows
89 # include "os_windows.inline.hpp"
90 #endif
91 #ifdef TARGET_OS_FAMILY_bsd
92 # include "os_bsd.inline.hpp"
93 #endif
94
95 static jint CurrentVersion = JNI_VERSION_1_8;
96
97
98 // The DT_RETURN_MARK macros create a scoped object to fire the dtrace
99 // '-return' probe regardless of the return path is taken out of the function.
100 // Methods that have multiple return paths use this to avoid having to
101 // instrument each return path. Methods that use CHECK or THROW must use this
102 // since those macros can cause an immedate uninstrumented return.
103 //
104 // In order to get the return value, a reference to the variable containing
105 // the return value must be passed to the contructor of the object, and
106 // the return value must be set before return (since the mark object has
107 // a reference to it).
108 //
109 // Example:
110 // DT_RETURN_MARK_DECL(SomeFunc, int);
111 // JNI_ENTRY(int, SomeFunc, ...)
112 // int return_value = 0;
113 // DT_RETURN_MARK(SomeFunc, int, (const int&)return_value);
114 // foo(CHECK_0)
115 // return_value = 5;
116 // return return_value;
117 // JNI_END
118 #define DT_RETURN_MARK_DECL(name, type, probe) \
119 DTRACE_ONLY( \
120 class DTraceReturnProbeMark_##name { \
121 public: \
122 const type& _ret_ref; \
123 DTraceReturnProbeMark_##name(const type& v) : _ret_ref(v) {} \
124 ~DTraceReturnProbeMark_##name() { \
125 probe; \
126 } \
127 } \
128 )
129 // Void functions are simpler since there's no return value
130 #define DT_VOID_RETURN_MARK_DECL(name, probe) \
131 DTRACE_ONLY( \
132 class DTraceReturnProbeMark_##name { \
133 public: \
134 ~DTraceReturnProbeMark_##name() { \
135 probe; \
136 } \
137 } \
138 )
139
140 // Place these macros in the function to mark the return. Non-void
141 // functions need the type and address of the return value.
142 #define DT_RETURN_MARK(name, type, ref) \
143 DTRACE_ONLY( DTraceReturnProbeMark_##name dtrace_return_mark(ref) )
144 #define DT_VOID_RETURN_MARK(name) \
145 DTRACE_ONLY( DTraceReturnProbeMark_##name dtrace_return_mark )
146
147
148 // Use these to select distinct code for floating-point vs. non-floating point
149 // situations. Used from within common macros where we need slightly
150 // different behavior for Float/Double
151 #define FP_SELECT_Boolean(intcode, fpcode) intcode
152 #define FP_SELECT_Byte(intcode, fpcode) intcode
153 #define FP_SELECT_Char(intcode, fpcode) intcode
154 #define FP_SELECT_Short(intcode, fpcode) intcode
155 #define FP_SELECT_Object(intcode, fpcode) intcode
156 #define FP_SELECT_Int(intcode, fpcode) intcode
157 #define FP_SELECT_Long(intcode, fpcode) intcode
158 #define FP_SELECT_Float(intcode, fpcode) fpcode
159 #define FP_SELECT_Double(intcode, fpcode) fpcode
160 #define FP_SELECT(TypeName, intcode, fpcode) \
161 FP_SELECT_##TypeName(intcode, fpcode)
162
163 #define COMMA ,
164
165 // Choose DT_RETURN_MARK macros based on the type: float/double -> void
166 // (dtrace doesn't do FP yet)
167 #define DT_RETURN_MARK_DECL_FOR(TypeName, name, type, probe) \
168 FP_SELECT(TypeName, \
169 DT_RETURN_MARK_DECL(name, type, probe), DT_VOID_RETURN_MARK_DECL(name, probe) )
170 #define DT_RETURN_MARK_FOR(TypeName, name, type, ref) \
171 FP_SELECT(TypeName, \
172 DT_RETURN_MARK(name, type, ref), DT_VOID_RETURN_MARK(name) )
173
174
175 // out-of-line helpers for class jfieldIDWorkaround:
176
177 bool jfieldIDWorkaround::is_valid_jfieldID(Klass* k, jfieldID id) {
178 if (jfieldIDWorkaround::is_instance_jfieldID(k, id)) {
179 uintptr_t as_uint = (uintptr_t) id;
180 intptr_t offset = raw_instance_offset(id);
181 if (is_checked_jfieldID(id)) {
182 if (!klass_hash_ok(k, id)) {
183 return false;
184 }
185 }
186 return InstanceKlass::cast(k)->contains_field_offset(offset);
187 } else {
188 JNIid* result = (JNIid*) id;
189 #ifdef ASSERT
190 return result != NULL && result->is_static_field_id();
191 #else
192 return result != NULL;
193 #endif
194 }
195 }
196
197
198 intptr_t jfieldIDWorkaround::encode_klass_hash(Klass* k, intptr_t offset) {
199 if (offset <= small_offset_mask) {
200 Klass* field_klass = k;
201 Klass* super_klass = field_klass->super();
202 // With compressed oops the most super class with nonstatic fields would
203 // be the owner of fields embedded in the header.
204 while (InstanceKlass::cast(super_klass)->has_nonstatic_fields() &&
205 InstanceKlass::cast(super_klass)->contains_field_offset(offset)) {
206 field_klass = super_klass; // super contains the field also
207 super_klass = field_klass->super();
208 }
209 debug_only(No_Safepoint_Verifier nosafepoint;)
210 uintptr_t klass_hash = field_klass->identity_hash();
211 return ((klass_hash & klass_mask) << klass_shift) | checked_mask_in_place;
212 } else {
213 #if 0
214 #ifndef PRODUCT
215 {
216 ResourceMark rm;
217 warning("VerifyJNIFields: long offset %d in %s", offset, k->external_name());
218 }
219 #endif
220 #endif
221 return 0;
222 }
223 }
224
225 bool jfieldIDWorkaround::klass_hash_ok(Klass* k, jfieldID id) {
226 uintptr_t as_uint = (uintptr_t) id;
227 intptr_t klass_hash = (as_uint >> klass_shift) & klass_mask;
228 do {
229 debug_only(No_Safepoint_Verifier nosafepoint;)
230 // Could use a non-blocking query for identity_hash here...
231 if ((k->identity_hash() & klass_mask) == klass_hash)
232 return true;
233 k = k->super();
234 } while (k != NULL);
235 return false;
236 }
237
238 void jfieldIDWorkaround::verify_instance_jfieldID(Klass* k, jfieldID id) {
239 guarantee(jfieldIDWorkaround::is_instance_jfieldID(k, id), "must be an instance field" );
240 uintptr_t as_uint = (uintptr_t) id;
241 intptr_t offset = raw_instance_offset(id);
242 if (VerifyJNIFields) {
243 if (is_checked_jfieldID(id)) {
244 guarantee(klass_hash_ok(k, id),
245 "Bug in native code: jfieldID class must match object");
246 } else {
247 #if 0
248 #ifndef PRODUCT
249 if (Verbose) {
250 ResourceMark rm;
251 warning("VerifyJNIFields: unverified offset %d for %s", offset, k->external_name());
252 }
253 #endif
254 #endif
255 }
256 }
257 guarantee(InstanceKlass::cast(k)->contains_field_offset(offset),
258 "Bug in native code: jfieldID offset must address interior of object");
259 }
260
261 // Pick a reasonable higher bound for local capacity requested
262 // for EnsureLocalCapacity and PushLocalFrame. We don't want it too
263 // high because a test (or very unusual application) may try to allocate
264 // that many handles and run out of swap space. An implementation is
265 // permitted to allocate more handles than the ensured capacity, so this
266 // value is set high enough to prevent compatibility problems.
267 const int MAX_REASONABLE_LOCAL_CAPACITY = 4*K;
268
269
270 // Wrapper to trace JNI functions
271
272 #ifdef ASSERT
273 Histogram* JNIHistogram;
274 static volatile jint JNIHistogram_lock = 0;
275
276 class JNITraceWrapper : public StackObj {
277 public:
278 JNITraceWrapper(const char* format, ...) ATTRIBUTE_PRINTF(2, 3) {
279 if (TraceJNICalls) {
280 va_list ap;
281 va_start(ap, format);
282 tty->print("JNI ");
283 tty->vprint_cr(format, ap);
284 va_end(ap);
285 }
286 }
287 };
288
289 class JNIHistogramElement : public HistogramElement {
290 public:
291 JNIHistogramElement(const char* name);
292 };
293
294 JNIHistogramElement::JNIHistogramElement(const char* elementName) {
295 _name = elementName;
296 uintx count = 0;
297
298 while (Atomic::cmpxchg(1, &JNIHistogram_lock, 0) != 0) {
299 while (OrderAccess::load_acquire(&JNIHistogram_lock) != 0) {
300 count +=1;
301 if ( (WarnOnStalledSpinLock > 0)
302 && (count % WarnOnStalledSpinLock == 0)) {
303 warning("JNIHistogram_lock seems to be stalled");
304 }
305 }
306 }
307
308
309 if(JNIHistogram == NULL)
310 JNIHistogram = new Histogram("JNI Call Counts",100);
311
312 JNIHistogram->add_element(this);
313 Atomic::dec(&JNIHistogram_lock);
314 }
315
316 #define JNICountWrapper(arg) \
317 static JNIHistogramElement* e = new JNIHistogramElement(arg); \
318 /* There is a MT-race condition in VC++. So we need to make sure that that e has been initialized */ \
319 if (e != NULL) e->increment_count()
320 #define JNIWrapper(arg) JNICountWrapper(arg); JNITraceWrapper(arg)
321 #else
322 #define JNIWrapper(arg)
323 #endif
324
325
326 // Implementation of JNI entries
327
328 DT_RETURN_MARK_DECL(DefineClass, jclass
329 , HOTSPOT_JNI_DEFINECLASS_RETURN(_ret_ref));
330
331 JNI_ENTRY(jclass, jni_DefineClass(JNIEnv *env, const char *name, jobject loaderRef,
332 const jbyte *buf, jsize bufLen))
333 JNIWrapper("DefineClass");
334
335 HOTSPOT_JNI_DEFINECLASS_ENTRY(
336 env, (char*) name, loaderRef, (char*) buf, bufLen);
337
338 jclass cls = NULL;
339 DT_RETURN_MARK(DefineClass, jclass, (const jclass&)cls);
340
341 TempNewSymbol class_name = NULL;
342 // Since exceptions can be thrown, class initialization can take place
343 // if name is NULL no check for class name in .class stream has to be made.
344 if (name != NULL) {
345 const int str_len = (int)strlen(name);
346 if (str_len > Symbol::max_length()) {
347 // It's impossible to create this class; the name cannot fit
348 // into the constant pool.
349 THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), name);
350 }
351 class_name = SymbolTable::new_symbol(name, CHECK_NULL);
352 }
353 ResourceMark rm(THREAD);
354 ClassFileStream st((u1*) buf, bufLen, NULL);
355 Handle class_loader (THREAD, JNIHandles::resolve(loaderRef));
356
357 if (UsePerfData && !class_loader.is_null()) {
358 // check whether the current caller thread holds the lock or not.
359 // If not, increment the corresponding counter
360 if (ObjectSynchronizer::
361 query_lock_ownership((JavaThread*)THREAD, class_loader) !=
362 ObjectSynchronizer::owner_self) {
363 ClassLoader::sync_JNIDefineClassLockFreeCounter()->inc();
364 }
365 }
366 Klass* k = SystemDictionary::resolve_from_stream(class_name, class_loader,
367 Handle(), &st, true,
368 CHECK_NULL);
369
370 if (TraceClassResolution && k != NULL) {
371 trace_class_resolution(k);
372 }
373
374 cls = (jclass)JNIHandles::make_local(
375 env, k->java_mirror());
376 return cls;
377 JNI_END
378
379
380
381 static bool first_time_FindClass = true;
382
383 DT_RETURN_MARK_DECL(FindClass, jclass
384 , HOTSPOT_JNI_FINDCLASS_RETURN(_ret_ref));
385
386 JNI_ENTRY(jclass, jni_FindClass(JNIEnv *env, const char *name))
387 JNIWrapper("FindClass");
388
389 HOTSPOT_JNI_FINDCLASS_ENTRY(env, (char *)name);
390
391 jclass result = NULL;
392 DT_RETURN_MARK(FindClass, jclass, (const jclass&)result);
393
394 // Remember if we are the first invocation of jni_FindClass
395 bool first_time = first_time_FindClass;
396 first_time_FindClass = false;
397
398 // Sanity check the name: it cannot be null or larger than the maximum size
399 // name we can fit in the constant pool.
400 if (name == NULL || (int)strlen(name) > Symbol::max_length()) {
401 THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), name);
402 }
403
404 //%note jni_3
405 Handle loader;
406 Handle protection_domain;
407 // Find calling class
408 instanceKlassHandle k (THREAD, thread->security_get_caller_class(0));
409 if (k.not_null()) {
410 loader = Handle(THREAD, k->class_loader());
411 // Special handling to make sure JNI_OnLoad and JNI_OnUnload are executed
412 // in the correct class context.
413 if (loader.is_null() &&
414 k->name() == vmSymbols::java_lang_ClassLoader_NativeLibrary()) {
415 JavaValue result(T_OBJECT);
416 JavaCalls::call_static(&result, k,
417 vmSymbols::getFromClass_name(),
418 vmSymbols::void_class_signature(),
419 thread);
420 if (HAS_PENDING_EXCEPTION) {
421 Handle ex(thread, thread->pending_exception());
422 CLEAR_PENDING_EXCEPTION;
423 THROW_HANDLE_0(ex);
424 }
425 oop mirror = (oop) result.get_jobject();
426 loader = Handle(THREAD,
427 InstanceKlass::cast(java_lang_Class::as_Klass(mirror))->class_loader());
428 protection_domain = Handle(THREAD,
429 InstanceKlass::cast(java_lang_Class::as_Klass(mirror))->protection_domain());
430 }
431 } else {
432 // We call ClassLoader.getSystemClassLoader to obtain the system class loader.
433 loader = Handle(THREAD, SystemDictionary::java_system_loader());
434 }
435
436 TempNewSymbol sym = SymbolTable::new_symbol(name, CHECK_NULL);
437 result = find_class_from_class_loader(env, sym, true, loader,
438 protection_domain, true, thread);
439
440 if (TraceClassResolution && result != NULL) {
441 trace_class_resolution(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(result)));
442 }
443
444 // If we were the first invocation of jni_FindClass, we enable compilation again
445 // rather than just allowing invocation counter to overflow and decay.
446 // Controlled by flag DelayCompilationDuringStartup.
447 if (first_time && !CompileTheWorld)
448 CompilationPolicy::completed_vm_startup();
449
450 return result;
451 JNI_END
452
453 DT_RETURN_MARK_DECL(FromReflectedMethod, jmethodID
454 , HOTSPOT_JNI_FROMREFLECTEDMETHOD_RETURN((uintptr_t)_ret_ref));
455
456 JNI_ENTRY(jmethodID, jni_FromReflectedMethod(JNIEnv *env, jobject method))
457 JNIWrapper("FromReflectedMethod");
458
459 HOTSPOT_JNI_FROMREFLECTEDMETHOD_ENTRY(env, method);
460
461 jmethodID ret = NULL;
462 DT_RETURN_MARK(FromReflectedMethod, jmethodID, (const jmethodID&)ret);
463
464 // method is a handle to a java.lang.reflect.Method object
465 oop reflected = JNIHandles::resolve_non_null(method);
466 oop mirror = NULL;
467 int slot = 0;
468
469 if (reflected->klass() == SystemDictionary::reflect_Constructor_klass()) {
470 mirror = java_lang_reflect_Constructor::clazz(reflected);
471 slot = java_lang_reflect_Constructor::slot(reflected);
472 } else {
473 assert(reflected->klass() == SystemDictionary::reflect_Method_klass(), "wrong type");
474 mirror = java_lang_reflect_Method::clazz(reflected);
475 slot = java_lang_reflect_Method::slot(reflected);
476 }
477 Klass* k = java_lang_Class::as_Klass(mirror);
478
479 KlassHandle k1(THREAD, k);
480 // Make sure class is initialized before handing id's out to methods
481 k1()->initialize(CHECK_NULL);
482 Method* m = InstanceKlass::cast(k1())->method_with_idnum(slot);
483 ret = m==NULL? NULL : m->jmethod_id(); // return NULL if reflected method deleted
484 return ret;
485 JNI_END
486
487 DT_RETURN_MARK_DECL(FromReflectedField, jfieldID
488 , HOTSPOT_JNI_FROMREFLECTEDFIELD_RETURN((uintptr_t)_ret_ref));
489
490 JNI_ENTRY(jfieldID, jni_FromReflectedField(JNIEnv *env, jobject field))
491 JNIWrapper("FromReflectedField");
492
493 HOTSPOT_JNI_FROMREFLECTEDFIELD_ENTRY(env, field);
494
495 jfieldID ret = NULL;
496 DT_RETURN_MARK(FromReflectedField, jfieldID, (const jfieldID&)ret);
497
498 // field is a handle to a java.lang.reflect.Field object
499 oop reflected = JNIHandles::resolve_non_null(field);
500 oop mirror = java_lang_reflect_Field::clazz(reflected);
501 Klass* k = java_lang_Class::as_Klass(mirror);
502 int slot = java_lang_reflect_Field::slot(reflected);
503 int modifiers = java_lang_reflect_Field::modifiers(reflected);
504
505 KlassHandle k1(THREAD, k);
506 // Make sure class is initialized before handing id's out to fields
507 k1()->initialize(CHECK_NULL);
508
509 // First check if this is a static field
510 if (modifiers & JVM_ACC_STATIC) {
511 intptr_t offset = InstanceKlass::cast(k1())->field_offset( slot );
512 JNIid* id = InstanceKlass::cast(k1())->jni_id_for(offset);
513 assert(id != NULL, "corrupt Field object");
514 debug_only(id->set_is_static_field_id();)
515 // A jfieldID for a static field is a JNIid specifying the field holder and the offset within the Klass*
516 ret = jfieldIDWorkaround::to_static_jfieldID(id);
517 return ret;
518 }
519
520 // The slot is the index of the field description in the field-array
521 // The jfieldID is the offset of the field within the object
522 // It may also have hash bits for k, if VerifyJNIFields is turned on.
523 intptr_t offset = InstanceKlass::cast(k1())->field_offset( slot );
524 assert(InstanceKlass::cast(k1())->contains_field_offset(offset), "stay within object");
525 ret = jfieldIDWorkaround::to_instance_jfieldID(k1(), offset);
526 return ret;
527 JNI_END
528
529
530 DT_RETURN_MARK_DECL(ToReflectedMethod, jobject
531 , HOTSPOT_JNI_TOREFLECTEDMETHOD_RETURN(_ret_ref));
532
533 JNI_ENTRY(jobject, jni_ToReflectedMethod(JNIEnv *env, jclass cls, jmethodID method_id, jboolean isStatic))
534 JNIWrapper("ToReflectedMethod");
535
536 HOTSPOT_JNI_TOREFLECTEDMETHOD_ENTRY(env, cls, (uintptr_t) method_id, isStatic);
537
538 jobject ret = NULL;
539 DT_RETURN_MARK(ToReflectedMethod, jobject, (const jobject&)ret);
540
541 methodHandle m (THREAD, Method::resolve_jmethod_id(method_id));
542 assert(m->is_static() == (isStatic != 0), "jni_ToReflectedMethod access flags doesn't match");
543 oop reflection_method;
544 if (m->is_initializer()) {
545 reflection_method = Reflection::new_constructor(m, CHECK_NULL);
546 } else {
547 reflection_method = Reflection::new_method(m, false, CHECK_NULL);
548 }
549 ret = JNIHandles::make_local(env, reflection_method);
550 return ret;
551 JNI_END
552
553 DT_RETURN_MARK_DECL(GetSuperclass, jclass
554 , HOTSPOT_JNI_GETSUPERCLASS_RETURN(_ret_ref));
555
556 JNI_ENTRY(jclass, jni_GetSuperclass(JNIEnv *env, jclass sub))
557 JNIWrapper("GetSuperclass");
558
559 HOTSPOT_JNI_GETSUPERCLASS_ENTRY(env, sub);
560
561 jclass obj = NULL;
562 DT_RETURN_MARK(GetSuperclass, jclass, (const jclass&)obj);
563
564 oop mirror = JNIHandles::resolve_non_null(sub);
565 // primitive classes return NULL
566 if (java_lang_Class::is_primitive(mirror)) return NULL;
567
568 // Rules of Class.getSuperClass as implemented by KLass::java_super:
569 // arrays return Object
570 // interfaces return NULL
571 // proper classes return Klass::super()
572 Klass* k = java_lang_Class::as_Klass(mirror);
573 if (k->is_interface()) return NULL;
574
575 // return mirror for superclass
576 Klass* super = k->java_super();
577 // super2 is the value computed by the compiler's getSuperClass intrinsic:
578 debug_only(Klass* super2 = ( k->oop_is_array()
579 ? SystemDictionary::Object_klass()
580 : k->super() ) );
581 assert(super == super2,
582 "java_super computation depends on interface, array, other super");
583 obj = (super == NULL) ? NULL : (jclass) JNIHandles::make_local(super->java_mirror());
584 return obj;
585 JNI_END
586
587 JNI_QUICK_ENTRY(jboolean, jni_IsAssignableFrom(JNIEnv *env, jclass sub, jclass super))
588 JNIWrapper("IsSubclassOf");
589
590 HOTSPOT_JNI_ISASSIGNABLEFROM_ENTRY(env, sub, super);
591
592 oop sub_mirror = JNIHandles::resolve_non_null(sub);
593 oop super_mirror = JNIHandles::resolve_non_null(super);
594 if (java_lang_Class::is_primitive(sub_mirror) ||
595 java_lang_Class::is_primitive(super_mirror)) {
596 jboolean ret = (sub_mirror == super_mirror);
597
598 HOTSPOT_JNI_ISASSIGNABLEFROM_RETURN(ret);
599 return ret;
600 }
601 Klass* sub_klass = java_lang_Class::as_Klass(sub_mirror);
602 Klass* super_klass = java_lang_Class::as_Klass(super_mirror);
603 assert(sub_klass != NULL && super_klass != NULL, "invalid arguments to jni_IsAssignableFrom");
604 jboolean ret = sub_klass->is_subtype_of(super_klass) ?
605 JNI_TRUE : JNI_FALSE;
606
607 HOTSPOT_JNI_ISASSIGNABLEFROM_RETURN(ret);
608 return ret;
609 JNI_END
610
611
612 DT_RETURN_MARK_DECL(Throw, jint
613 , HOTSPOT_JNI_THROW_RETURN(_ret_ref));
614
615 JNI_ENTRY(jint, jni_Throw(JNIEnv *env, jthrowable obj))
616 JNIWrapper("Throw");
617
618 HOTSPOT_JNI_THROW_ENTRY(env, obj);
619
620 jint ret = JNI_OK;
621 DT_RETURN_MARK(Throw, jint, (const jint&)ret);
622
623 THROW_OOP_(JNIHandles::resolve(obj), JNI_OK);
624 ShouldNotReachHere();
625 JNI_END
626
627
628 DT_RETURN_MARK_DECL(ThrowNew, jint
629 , HOTSPOT_JNI_THROWNEW_RETURN(_ret_ref));
630
631 JNI_ENTRY(jint, jni_ThrowNew(JNIEnv *env, jclass clazz, const char *message))
632 JNIWrapper("ThrowNew");
633
634 HOTSPOT_JNI_THROWNEW_ENTRY(env, clazz, (char *) message);
635
636 jint ret = JNI_OK;
637 DT_RETURN_MARK(ThrowNew, jint, (const jint&)ret);
638
639 InstanceKlass* k = InstanceKlass::cast(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz)));
640 Symbol* name = k->name();
641 Handle class_loader (THREAD, k->class_loader());
642 Handle protection_domain (THREAD, k->protection_domain());
643 THROW_MSG_LOADER_(name, (char *)message, class_loader, protection_domain, JNI_OK);
644 ShouldNotReachHere();
645 JNI_END
646
647
648 // JNI functions only transform a pending async exception to a synchronous
649 // exception in ExceptionOccurred and ExceptionCheck calls, since
650 // delivering an async exception in other places won't change the native
651 // code's control flow and would be harmful when native code further calls
652 // JNI functions with a pending exception. Async exception is also checked
653 // during the call, so ExceptionOccurred/ExceptionCheck won't return
654 // false but deliver the async exception at the very end during
655 // state transition.
656
657 static void jni_check_async_exceptions(JavaThread *thread) {
658 assert(thread == Thread::current(), "must be itself");
659 thread->check_and_handle_async_exceptions();
660 }
661
662 JNI_ENTRY_NO_PRESERVE(jthrowable, jni_ExceptionOccurred(JNIEnv *env))
663 JNIWrapper("ExceptionOccurred");
664
665 HOTSPOT_JNI_EXCEPTIONOCCURRED_ENTRY(env);
666
667 jni_check_async_exceptions(thread);
668 oop exception = thread->pending_exception();
669 jthrowable ret = (jthrowable) JNIHandles::make_local(env, exception);
670
671 HOTSPOT_JNI_EXCEPTIONOCCURRED_RETURN(ret);
672 return ret;
673 JNI_END
674
675
676 JNI_ENTRY_NO_PRESERVE(void, jni_ExceptionDescribe(JNIEnv *env))
677 JNIWrapper("ExceptionDescribe");
678
679 HOTSPOT_JNI_EXCEPTIONDESCRIBE_ENTRY(env);
680
681 if (thread->has_pending_exception()) {
682 Handle ex(thread, thread->pending_exception());
683 thread->clear_pending_exception();
684 if (ex->is_a(SystemDictionary::ThreadDeath_klass())) {
685 // Don't print anything if we are being killed.
686 } else {
687 jio_fprintf(defaultStream::error_stream(), "Exception ");
688 if (thread != NULL && thread->threadObj() != NULL) {
689 ResourceMark rm(THREAD);
690 jio_fprintf(defaultStream::error_stream(),
691 "in thread \"%s\" ", thread->get_thread_name());
692 }
693 if (ex->is_a(SystemDictionary::Throwable_klass())) {
694 JavaValue result(T_VOID);
695 JavaCalls::call_virtual(&result,
696 ex,
697 KlassHandle(THREAD,
698 SystemDictionary::Throwable_klass()),
699 vmSymbols::printStackTrace_name(),
700 vmSymbols::void_method_signature(),
701 THREAD);
702 // If an exception is thrown in the call it gets thrown away. Not much
703 // we can do with it. The native code that calls this, does not check
704 // for the exception - hence, it might still be in the thread when DestroyVM gets
705 // called, potentially causing a few asserts to trigger - since no pending exception
706 // is expected.
707 CLEAR_PENDING_EXCEPTION;
708 } else {
709 ResourceMark rm(THREAD);
710 jio_fprintf(defaultStream::error_stream(),
711 ". Uncaught exception of type %s.",
712 ex->klass()->external_name());
713 }
714 }
715 }
716
717 HOTSPOT_JNI_EXCEPTIONDESCRIBE_RETURN();
718 JNI_END
719
720
721 JNI_QUICK_ENTRY(void, jni_ExceptionClear(JNIEnv *env))
722 JNIWrapper("ExceptionClear");
723
724 HOTSPOT_JNI_EXCEPTIONCLEAR_ENTRY(env);
725
726 // The jni code might be using this API to clear java thrown exception.
727 // So just mark jvmti thread exception state as exception caught.
728 JvmtiThreadState *state = JavaThread::current()->jvmti_thread_state();
729 if (state != NULL && state->is_exception_detected()) {
730 state->set_exception_caught();
731 }
732 thread->clear_pending_exception();
733
734 HOTSPOT_JNI_EXCEPTIONCLEAR_RETURN();
735 JNI_END
736
737
738 JNI_ENTRY(void, jni_FatalError(JNIEnv *env, const char *msg))
739 JNIWrapper("FatalError");
740
741 HOTSPOT_JNI_FATALERROR_ENTRY(env, (char *) msg);
742
743 tty->print_cr("FATAL ERROR in native method: %s", msg);
744 thread->print_stack();
745 os::abort(); // Dump core and abort
746 JNI_END
747
748
749 JNI_ENTRY(jint, jni_PushLocalFrame(JNIEnv *env, jint capacity))
750 JNIWrapper("PushLocalFrame");
751
752 HOTSPOT_JNI_PUSHLOCALFRAME_ENTRY(env, capacity);
753
754 //%note jni_11
755 if (capacity < 0 || capacity > MAX_REASONABLE_LOCAL_CAPACITY) {
756 HOTSPOT_JNI_PUSHLOCALFRAME_RETURN((uint32_t)JNI_ERR);
757 return JNI_ERR;
758 }
759 JNIHandleBlock* old_handles = thread->active_handles();
760 JNIHandleBlock* new_handles = JNIHandleBlock::allocate_block(thread);
761 assert(new_handles != NULL, "should not be NULL");
762 new_handles->set_pop_frame_link(old_handles);
763 thread->set_active_handles(new_handles);
764 jint ret = JNI_OK;
765 HOTSPOT_JNI_PUSHLOCALFRAME_RETURN(ret);
766 return ret;
767 JNI_END
768
769
770 JNI_ENTRY(jobject, jni_PopLocalFrame(JNIEnv *env, jobject result))
771 JNIWrapper("PopLocalFrame");
772
773 HOTSPOT_JNI_POPLOCALFRAME_ENTRY(env, result);
774
775 //%note jni_11
776 Handle result_handle(thread, JNIHandles::resolve(result));
777 JNIHandleBlock* old_handles = thread->active_handles();
778 JNIHandleBlock* new_handles = old_handles->pop_frame_link();
779 if (new_handles != NULL) {
780 // As a sanity check we only release the handle blocks if the pop_frame_link is not NULL.
781 // This way code will still work if PopLocalFrame is called without a corresponding
782 // PushLocalFrame call. Note that we set the pop_frame_link to NULL explicitly, otherwise
783 // the release_block call will release the blocks.
784 thread->set_active_handles(new_handles);
785 old_handles->set_pop_frame_link(NULL); // clear link we won't release new_handles below
786 JNIHandleBlock::release_block(old_handles, thread); // may block
787 result = JNIHandles::make_local(thread, result_handle());
788 }
789 HOTSPOT_JNI_POPLOCALFRAME_RETURN(result);
790 return result;
791 JNI_END
792
793
794 JNI_ENTRY(jobject, jni_NewGlobalRef(JNIEnv *env, jobject ref))
795 JNIWrapper("NewGlobalRef");
796
797 HOTSPOT_JNI_NEWGLOBALREF_ENTRY(env, ref);
798
799 Handle ref_handle(thread, JNIHandles::resolve(ref));
800 jobject ret = JNIHandles::make_global(ref_handle);
801
802 HOTSPOT_JNI_NEWGLOBALREF_RETURN(ret);
803 return ret;
804 JNI_END
805
806 // Must be JNI_ENTRY (with HandleMark)
807 JNI_ENTRY_NO_PRESERVE(void, jni_DeleteGlobalRef(JNIEnv *env, jobject ref))
808 JNIWrapper("DeleteGlobalRef");
809
810 HOTSPOT_JNI_DELETEGLOBALREF_ENTRY(env, ref);
811
812 JNIHandles::destroy_global(ref);
813
814 HOTSPOT_JNI_DELETEGLOBALREF_RETURN();
815 JNI_END
816
817 JNI_QUICK_ENTRY(void, jni_DeleteLocalRef(JNIEnv *env, jobject obj))
818 JNIWrapper("DeleteLocalRef");
819
820 HOTSPOT_JNI_DELETELOCALREF_ENTRY(env, obj);
821
822 JNIHandles::destroy_local(obj);
823
824 HOTSPOT_JNI_DELETELOCALREF_RETURN();
825 JNI_END
826
827 JNI_QUICK_ENTRY(jboolean, jni_IsSameObject(JNIEnv *env, jobject r1, jobject r2))
828 JNIWrapper("IsSameObject");
829
830 HOTSPOT_JNI_ISSAMEOBJECT_ENTRY(env, r1, r2);
831
832 oop a = JNIHandles::resolve(r1);
833 oop b = JNIHandles::resolve(r2);
834 jboolean ret = (a == b) ? JNI_TRUE : JNI_FALSE;
835
836 HOTSPOT_JNI_ISSAMEOBJECT_RETURN(ret);
837 return ret;
838 JNI_END
839
840
841 JNI_ENTRY(jobject, jni_NewLocalRef(JNIEnv *env, jobject ref))
842 JNIWrapper("NewLocalRef");
843
844 HOTSPOT_JNI_NEWLOCALREF_ENTRY(env, ref);
845
846 jobject ret = JNIHandles::make_local(env, JNIHandles::resolve(ref));
847
848 HOTSPOT_JNI_NEWLOCALREF_RETURN(ret);
849 return ret;
850 JNI_END
851
852 JNI_LEAF(jint, jni_EnsureLocalCapacity(JNIEnv *env, jint capacity))
853 JNIWrapper("EnsureLocalCapacity");
854
855 HOTSPOT_JNI_ENSURELOCALCAPACITY_ENTRY(env, capacity);
856
857 jint ret;
858 if (capacity >= 0 && capacity <= MAX_REASONABLE_LOCAL_CAPACITY) {
859 ret = JNI_OK;
860 } else {
861 ret = JNI_ERR;
862 }
863
864 HOTSPOT_JNI_ENSURELOCALCAPACITY_RETURN(ret);
865 return ret;
866 JNI_END
867
868 // Return the Handle Type
869 JNI_LEAF(jobjectRefType, jni_GetObjectRefType(JNIEnv *env, jobject obj))
870 JNIWrapper("GetObjectRefType");
871
872 HOTSPOT_JNI_GETOBJECTREFTYPE_ENTRY(env, obj);
873
874 jobjectRefType ret;
875 if (JNIHandles::is_local_handle(thread, obj) ||
876 JNIHandles::is_frame_handle(thread, obj))
877 ret = JNILocalRefType;
878 else if (JNIHandles::is_global_handle(obj))
879 ret = JNIGlobalRefType;
880 else if (JNIHandles::is_weak_global_handle(obj))
881 ret = JNIWeakGlobalRefType;
882 else
883 ret = JNIInvalidRefType;
884
885 HOTSPOT_JNI_GETOBJECTREFTYPE_RETURN((void *) ret);
886 return ret;
887 JNI_END
888
889
890 class JNI_ArgumentPusher : public SignatureIterator {
891 protected:
892 JavaCallArguments* _arguments;
893
894 virtual void get_bool () = 0;
895 virtual void get_char () = 0;
896 virtual void get_short () = 0;
897 virtual void get_byte () = 0;
898 virtual void get_int () = 0;
899 virtual void get_long () = 0;
900 virtual void get_float () = 0;
901 virtual void get_double () = 0;
902 virtual void get_object () = 0;
903
904 JNI_ArgumentPusher(Symbol* signature) : SignatureIterator(signature) {
905 this->_return_type = T_ILLEGAL;
906 _arguments = NULL;
907 }
908
909 public:
910 virtual void iterate( uint64_t fingerprint ) = 0;
911
912 void set_java_argument_object(JavaCallArguments *arguments) { _arguments = arguments; }
913
914 inline void do_bool() { if (!is_return_type()) get_bool(); }
915 inline void do_char() { if (!is_return_type()) get_char(); }
916 inline void do_short() { if (!is_return_type()) get_short(); }
917 inline void do_byte() { if (!is_return_type()) get_byte(); }
918 inline void do_int() { if (!is_return_type()) get_int(); }
919 inline void do_long() { if (!is_return_type()) get_long(); }
920 inline void do_float() { if (!is_return_type()) get_float(); }
921 inline void do_double() { if (!is_return_type()) get_double(); }
922 inline void do_object(int begin, int end) { if (!is_return_type()) get_object(); }
923 inline void do_array(int begin, int end) { if (!is_return_type()) get_object(); } // do_array uses get_object -- there is no get_array
924 inline void do_void() { }
925
926 JavaCallArguments* arguments() { return _arguments; }
927 void push_receiver(Handle h) { _arguments->push_oop(h); }
928 };
929
930
931 class JNI_ArgumentPusherVaArg : public JNI_ArgumentPusher {
932 protected:
933 va_list _ap;
934
935 inline void get_bool() { _arguments->push_int(va_arg(_ap, jint)); } // bool is coerced to int when using va_arg
936 inline void get_char() { _arguments->push_int(va_arg(_ap, jint)); } // char is coerced to int when using va_arg
937 inline void get_short() { _arguments->push_int(va_arg(_ap, jint)); } // short is coerced to int when using va_arg
938 inline void get_byte() { _arguments->push_int(va_arg(_ap, jint)); } // byte is coerced to int when using va_arg
939 inline void get_int() { _arguments->push_int(va_arg(_ap, jint)); }
940
941 // each of these paths is exercized by the various jck Call[Static,Nonvirtual,][Void,Int,..]Method[A,V,] tests
942
943 inline void get_long() { _arguments->push_long(va_arg(_ap, jlong)); }
944 inline void get_float() { _arguments->push_float((jfloat)va_arg(_ap, jdouble)); } // float is coerced to double w/ va_arg
945 inline void get_double() { _arguments->push_double(va_arg(_ap, jdouble)); }
946 inline void get_object() { jobject l = va_arg(_ap, jobject);
947 _arguments->push_oop(Handle((oop *)l, false)); }
948
949 inline void set_ap(va_list rap) {
950 #ifdef va_copy
951 va_copy(_ap, rap);
952 #elif defined (__va_copy)
953 __va_copy(_ap, rap);
954 #else
955 _ap = rap;
956 #endif
957 }
958
959 public:
960 JNI_ArgumentPusherVaArg(Symbol* signature, va_list rap)
961 : JNI_ArgumentPusher(signature) {
962 set_ap(rap);
963 }
964 JNI_ArgumentPusherVaArg(jmethodID method_id, va_list rap)
965 : JNI_ArgumentPusher(Method::resolve_jmethod_id(method_id)->signature()) {
966 set_ap(rap);
967 }
968
969 // Optimized path if we have the bitvector form of signature
970 void iterate( uint64_t fingerprint ) {
971 if ( fingerprint == UCONST64(-1) ) SignatureIterator::iterate();// Must be too many arguments
972 else {
973 _return_type = (BasicType)((fingerprint >> static_feature_size) &
974 result_feature_mask);
975
976 assert(fingerprint, "Fingerprint should not be 0");
977 fingerprint = fingerprint >> (static_feature_size + result_feature_size);
978 while ( 1 ) {
979 switch ( fingerprint & parameter_feature_mask ) {
980 case bool_parm:
981 case char_parm:
982 case short_parm:
983 case byte_parm:
984 case int_parm:
985 get_int();
986 break;
987 case obj_parm:
988 get_object();
989 break;
990 case long_parm:
991 get_long();
992 break;
993 case float_parm:
994 get_float();
995 break;
996 case double_parm:
997 get_double();
998 break;
999 case done_parm:
1000 return;
1001 break;
1002 default:
1003 ShouldNotReachHere();
1004 break;
1005 }
1006 fingerprint >>= parameter_feature_size;
1007 }
1008 }
1009 }
1010 };
1011
1012
1013 class JNI_ArgumentPusherArray : public JNI_ArgumentPusher {
1014 protected:
1015 const jvalue *_ap;
1016
1017 inline void get_bool() { _arguments->push_int((jint)(_ap++)->z); }
1018 inline void get_char() { _arguments->push_int((jint)(_ap++)->c); }
1019 inline void get_short() { _arguments->push_int((jint)(_ap++)->s); }
1020 inline void get_byte() { _arguments->push_int((jint)(_ap++)->b); }
1021 inline void get_int() { _arguments->push_int((jint)(_ap++)->i); }
1022
1023 inline void get_long() { _arguments->push_long((_ap++)->j); }
1024 inline void get_float() { _arguments->push_float((_ap++)->f); }
1025 inline void get_double() { _arguments->push_double((_ap++)->d);}
1026 inline void get_object() { _arguments->push_oop(Handle((oop *)(_ap++)->l, false)); }
1027
1028 inline void set_ap(const jvalue *rap) { _ap = rap; }
1029
1030 public:
1031 JNI_ArgumentPusherArray(Symbol* signature, const jvalue *rap)
1032 : JNI_ArgumentPusher(signature) {
1033 set_ap(rap);
1034 }
1035 JNI_ArgumentPusherArray(jmethodID method_id, const jvalue *rap)
1036 : JNI_ArgumentPusher(Method::resolve_jmethod_id(method_id)->signature()) {
1037 set_ap(rap);
1038 }
1039
1040 // Optimized path if we have the bitvector form of signature
1041 void iterate( uint64_t fingerprint ) {
1042 if ( fingerprint == UCONST64(-1) ) SignatureIterator::iterate(); // Must be too many arguments
1043 else {
1044 _return_type = (BasicType)((fingerprint >> static_feature_size) &
1045 result_feature_mask);
1046 assert(fingerprint, "Fingerprint should not be 0");
1047 fingerprint = fingerprint >> (static_feature_size + result_feature_size);
1048 while ( 1 ) {
1049 switch ( fingerprint & parameter_feature_mask ) {
1050 case bool_parm:
1051 get_bool();
1052 break;
1053 case char_parm:
1054 get_char();
1055 break;
1056 case short_parm:
1057 get_short();
1058 break;
1059 case byte_parm:
1060 get_byte();
1061 break;
1062 case int_parm:
1063 get_int();
1064 break;
1065 case obj_parm:
1066 get_object();
1067 break;
1068 case long_parm:
1069 get_long();
1070 break;
1071 case float_parm:
1072 get_float();
1073 break;
1074 case double_parm:
1075 get_double();
1076 break;
1077 case done_parm:
1078 return;
1079 break;
1080 default:
1081 ShouldNotReachHere();
1082 break;
1083 }
1084 fingerprint >>= parameter_feature_size;
1085 }
1086 }
1087 }
1088 };
1089
1090
1091 enum JNICallType {
1092 JNI_STATIC,
1093 JNI_VIRTUAL,
1094 JNI_NONVIRTUAL
1095 };
1096
1097
1098
1099 static void jni_invoke_static(JNIEnv *env, JavaValue* result, jobject receiver, JNICallType call_type, jmethodID method_id, JNI_ArgumentPusher *args, TRAPS) {
1100 methodHandle method(THREAD, Method::resolve_jmethod_id(method_id));
1101
1102 // Create object to hold arguments for the JavaCall, and associate it with
1103 // the jni parser
1104 ResourceMark rm(THREAD);
1105 int number_of_parameters = method->size_of_parameters();
1106 JavaCallArguments java_args(number_of_parameters);
1107 args->set_java_argument_object(&java_args);
1108
1109 assert(method->is_static(), "method should be static");
1110
1111 // Fill out JavaCallArguments object
1112 args->iterate( Fingerprinter(method).fingerprint() );
1113 // Initialize result type
1114 result->set_type(args->get_ret_type());
1115
1116 // Invoke the method. Result is returned as oop.
1117 JavaCalls::call(result, method, &java_args, CHECK);
1118
1119 // Convert result
1120 if (result->get_type() == T_OBJECT || result->get_type() == T_ARRAY) {
1121 result->set_jobject(JNIHandles::make_local(env, (oop) result->get_jobject()));
1122 }
1123 }
1124
1125
1126 static void jni_invoke_nonstatic(JNIEnv *env, JavaValue* result, jobject receiver, JNICallType call_type, jmethodID method_id, JNI_ArgumentPusher *args, TRAPS) {
1127 oop recv = JNIHandles::resolve(receiver);
1128 if (recv == NULL) {
1129 THROW(vmSymbols::java_lang_NullPointerException());
1130 }
1131 Handle h_recv(THREAD, recv);
1132
1133 int number_of_parameters;
1134 Method* selected_method;
1135 {
1136 Method* m = Method::resolve_jmethod_id(method_id);
1137 number_of_parameters = m->size_of_parameters();
1138 Klass* holder = m->method_holder();
1139 if (!(holder)->is_interface()) {
1140 // non-interface call -- for that little speed boost, don't handlize
1141 debug_only(No_Safepoint_Verifier nosafepoint;)
1142 if (call_type == JNI_VIRTUAL) {
1143 // jni_GetMethodID makes sure class is linked and initialized
1144 // so m should have a valid vtable index.
1145 assert(!m->has_itable_index(), "");
1146 int vtbl_index = m->vtable_index();
1147 if (vtbl_index != Method::nonvirtual_vtable_index) {
1148 Klass* k = h_recv->klass();
1149 // k might be an arrayKlassOop but all vtables start at
1150 // the same place. The cast is to avoid virtual call and assertion.
1151 InstanceKlass *ik = (InstanceKlass*)k;
1152 selected_method = ik->method_at_vtable(vtbl_index);
1153 } else {
1154 // final method
1155 selected_method = m;
1156 }
1157 } else {
1158 // JNI_NONVIRTUAL call
1159 selected_method = m;
1160 }
1161 } else {
1162 // interface call
1163 KlassHandle h_holder(THREAD, holder);
1164
1165 if (call_type == JNI_VIRTUAL) {
1166 int itbl_index = m->itable_index();
1167 Klass* k = h_recv->klass();
1168 selected_method = InstanceKlass::cast(k)->method_at_itable(h_holder(), itbl_index, CHECK);
1169 } else {
1170 selected_method = m;
1171 }
1172 }
1173 }
1174
1175 methodHandle method(THREAD, selected_method);
1176
1177 // Create object to hold arguments for the JavaCall, and associate it with
1178 // the jni parser
1179 ResourceMark rm(THREAD);
1180 JavaCallArguments java_args(number_of_parameters);
1181 args->set_java_argument_object(&java_args);
1182
1183 // handle arguments
1184 assert(!method->is_static(), "method should not be static");
1185 args->push_receiver(h_recv); // Push jobject handle
1186
1187 // Fill out JavaCallArguments object
1188 args->iterate( Fingerprinter(method).fingerprint() );
1189 // Initialize result type
1190 result->set_type(args->get_ret_type());
1191
1192 // Invoke the method. Result is returned as oop.
1193 JavaCalls::call(result, method, &java_args, CHECK);
1194
1195 // Convert result
1196 if (result->get_type() == T_OBJECT || result->get_type() == T_ARRAY) {
1197 result->set_jobject(JNIHandles::make_local(env, (oop) result->get_jobject()));
1198 }
1199 }
1200
1201
1202 static instanceOop alloc_object(jclass clazz, TRAPS) {
1203 KlassHandle k(THREAD, java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz)));
1204 if (k == NULL) {
1205 ResourceMark rm(THREAD);
1206 THROW_(vmSymbols::java_lang_InstantiationException(), NULL);
1207 }
1208 k()->check_valid_for_instantiation(false, CHECK_NULL);
1209 InstanceKlass::cast(k())->initialize(CHECK_NULL);
1210 instanceOop ih = InstanceKlass::cast(k())->allocate_instance(THREAD);
1211 return ih;
1212 }
1213
1214 DT_RETURN_MARK_DECL(AllocObject, jobject
1215 , HOTSPOT_JNI_ALLOCOBJECT_RETURN(_ret_ref));
1216
1217 JNI_ENTRY(jobject, jni_AllocObject(JNIEnv *env, jclass clazz))
1218 JNIWrapper("AllocObject");
1219
1220 HOTSPOT_JNI_ALLOCOBJECT_ENTRY(env, clazz);
1221
1222 jobject ret = NULL;
1223 DT_RETURN_MARK(AllocObject, jobject, (const jobject&)ret);
1224
1225 instanceOop i = alloc_object(clazz, CHECK_NULL);
1226 ret = JNIHandles::make_local(env, i);
1227 return ret;
1228 JNI_END
1229
1230 DT_RETURN_MARK_DECL(NewObjectA, jobject
1231 , HOTSPOT_JNI_NEWOBJECTA_RETURN(_ret_ref));
1232
1233 JNI_ENTRY(jobject, jni_NewObjectA(JNIEnv *env, jclass clazz, jmethodID methodID, const jvalue *args))
1234 JNIWrapper("NewObjectA");
1235
1236 HOTSPOT_JNI_NEWOBJECTA_ENTRY(env, clazz, (uintptr_t) methodID);
1237
1238 jobject obj = NULL;
1239 DT_RETURN_MARK(NewObjectA, jobject, (const jobject)obj);
1240
1241 instanceOop i = alloc_object(clazz, CHECK_NULL);
1242 obj = JNIHandles::make_local(env, i);
1243 JavaValue jvalue(T_VOID);
1244 JNI_ArgumentPusherArray ap(methodID, args);
1245 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_NULL);
1246 return obj;
1247 JNI_END
1248
1249
1250 DT_RETURN_MARK_DECL(NewObjectV, jobject
1251 , HOTSPOT_JNI_NEWOBJECTV_RETURN(_ret_ref));
1252
1253 JNI_ENTRY(jobject, jni_NewObjectV(JNIEnv *env, jclass clazz, jmethodID methodID, va_list args))
1254 JNIWrapper("NewObjectV");
1255
1256 HOTSPOT_JNI_NEWOBJECTV_ENTRY(env, clazz, (uintptr_t) methodID);
1257
1258 jobject obj = NULL;
1259 DT_RETURN_MARK(NewObjectV, jobject, (const jobject&)obj);
1260
1261 instanceOop i = alloc_object(clazz, CHECK_NULL);
1262 obj = JNIHandles::make_local(env, i);
1263 JavaValue jvalue(T_VOID);
1264 JNI_ArgumentPusherVaArg ap(methodID, args);
1265 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_NULL);
1266 return obj;
1267 JNI_END
1268
1269
1270 DT_RETURN_MARK_DECL(NewObject, jobject
1271 , HOTSPOT_JNI_NEWOBJECT_RETURN(_ret_ref));
1272
1273 JNI_ENTRY(jobject, jni_NewObject(JNIEnv *env, jclass clazz, jmethodID methodID, ...))
1274 JNIWrapper("NewObject");
1275
1276 HOTSPOT_JNI_NEWOBJECT_ENTRY(env, clazz, (uintptr_t) methodID);
1277
1278 jobject obj = NULL;
1279 DT_RETURN_MARK(NewObject, jobject, (const jobject&)obj);
1280
1281 instanceOop i = alloc_object(clazz, CHECK_NULL);
1282 obj = JNIHandles::make_local(env, i);
1283 va_list args;
1284 va_start(args, methodID);
1285 JavaValue jvalue(T_VOID);
1286 JNI_ArgumentPusherVaArg ap(methodID, args);
1287 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_NULL);
1288 va_end(args);
1289 return obj;
1290 JNI_END
1291
1292
1293 JNI_ENTRY(jclass, jni_GetObjectClass(JNIEnv *env, jobject obj))
1294 JNIWrapper("GetObjectClass");
1295
1296 HOTSPOT_JNI_GETOBJECTCLASS_ENTRY(env, obj);
1297
1298 Klass* k = JNIHandles::resolve_non_null(obj)->klass();
1299 jclass ret =
1300 (jclass) JNIHandles::make_local(env, k->java_mirror());
1301
1302 HOTSPOT_JNI_GETOBJECTCLASS_RETURN(ret);
1303 return ret;
1304 JNI_END
1305
1306 JNI_QUICK_ENTRY(jboolean, jni_IsInstanceOf(JNIEnv *env, jobject obj, jclass clazz))
1307 JNIWrapper("IsInstanceOf");
1308
1309 HOTSPOT_JNI_ISINSTANCEOF_ENTRY(env, obj, clazz);
1310
1311 jboolean ret = JNI_TRUE;
1312 if (obj != NULL) {
1313 ret = JNI_FALSE;
1314 Klass* k = java_lang_Class::as_Klass(
1315 JNIHandles::resolve_non_null(clazz));
1316 if (k != NULL) {
1317 ret = JNIHandles::resolve_non_null(obj)->is_a(k) ? JNI_TRUE : JNI_FALSE;
1318 }
1319 }
1320
1321 HOTSPOT_JNI_ISINSTANCEOF_RETURN(ret);
1322 return ret;
1323 JNI_END
1324
1325
1326 static jmethodID get_method_id(JNIEnv *env, jclass clazz, const char *name_str,
1327 const char *sig, bool is_static, TRAPS) {
1328 // %%%% This code should probably just call into a method in the LinkResolver
1329 //
1330 // The class should have been loaded (we have an instance of the class
1331 // passed in) so the method and signature should already be in the symbol
1332 // table. If they're not there, the method doesn't exist.
1333 const char *name_to_probe = (name_str == NULL)
1334 ? vmSymbols::object_initializer_name()->as_C_string()
1335 : name_str;
1336 TempNewSymbol name = SymbolTable::probe(name_to_probe, (int)strlen(name_to_probe));
1337 TempNewSymbol signature = SymbolTable::probe(sig, (int)strlen(sig));
1338
1339 if (name == NULL || signature == NULL) {
1340 THROW_MSG_0(vmSymbols::java_lang_NoSuchMethodError(), name_str);
1341 }
1342
1343 // Throw a NoSuchMethodError exception if we have an instance of a
1344 // primitive java.lang.Class
1345 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(clazz))) {
1346 THROW_MSG_0(vmSymbols::java_lang_NoSuchMethodError(), name_str);
1347 }
1348
1349 KlassHandle klass(THREAD,
1350 java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz)));
1351
1352 // Make sure class is linked and initialized before handing id's out to
1353 // Method*s.
1354 klass()->initialize(CHECK_NULL);
1355
1356 Method* m;
1357 if (name == vmSymbols::object_initializer_name() ||
1358 name == vmSymbols::class_initializer_name()) {
1359 // Never search superclasses for constructors
1360 if (klass->oop_is_instance()) {
1361 m = InstanceKlass::cast(klass())->find_method(name, signature);
1362 } else {
1363 m = NULL;
1364 }
1365 } else {
1366 m = klass->lookup_method(name, signature);
1367 if (m == NULL && klass->oop_is_instance()) {
1368 m = InstanceKlass::cast(klass())->lookup_method_in_ordered_interfaces(name, signature);
1369 }
1370 }
1371 if (m == NULL || (m->is_static() != is_static)) {
1372 THROW_MSG_0(vmSymbols::java_lang_NoSuchMethodError(), name_str);
1373 }
1374 return m->jmethod_id();
1375 }
1376
1377
1378 JNI_ENTRY(jmethodID, jni_GetMethodID(JNIEnv *env, jclass clazz,
1379 const char *name, const char *sig))
1380 JNIWrapper("GetMethodID");
1381 HOTSPOT_JNI_GETMETHODID_ENTRY(env, clazz, (char *) name, (char *) sig);
1382 jmethodID ret = get_method_id(env, clazz, name, sig, false, thread);
1383 HOTSPOT_JNI_GETMETHODID_RETURN((uintptr_t) ret);
1384 return ret;
1385 JNI_END
1386
1387
1388 JNI_ENTRY(jmethodID, jni_GetStaticMethodID(JNIEnv *env, jclass clazz,
1389 const char *name, const char *sig))
1390 JNIWrapper("GetStaticMethodID");
1391 HOTSPOT_JNI_GETSTATICMETHODID_ENTRY(env, (char *) clazz, (char *) name, (char *)sig);
1392 jmethodID ret = get_method_id(env, clazz, name, sig, true, thread);
1393 HOTSPOT_JNI_GETSTATICMETHODID_RETURN((uintptr_t) ret);
1394 return ret;
1395 JNI_END
1396
1397
1398
1399 //
1400 // Calling Methods
1401 //
1402
1403
1404 #define DEFINE_CALLMETHOD(ResultType, Result, Tag \
1405 , EntryProbe, ReturnProbe) \
1406 \
1407 DT_RETURN_MARK_DECL_FOR(Result, Call##Result##Method, ResultType \
1408 , ReturnProbe); \
1409 \
1410 JNI_ENTRY(ResultType, \
1411 jni_Call##Result##Method(JNIEnv *env, jobject obj, jmethodID methodID, ...)) \
1412 JNIWrapper("Call" XSTR(Result) "Method"); \
1413 \
1414 EntryProbe; \
1415 ResultType ret = 0;\
1416 DT_RETURN_MARK_FOR(Result, Call##Result##Method, ResultType, \
1417 (const ResultType&)ret);\
1418 \
1419 va_list args; \
1420 va_start(args, methodID); \
1421 JavaValue jvalue(Tag); \
1422 JNI_ArgumentPusherVaArg ap(methodID, args); \
1423 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK_0); \
1424 va_end(args); \
1425 ret = jvalue.get_##ResultType(); \
1426 return ret;\
1427 JNI_END
1428
1429 // the runtime type of subword integral basic types is integer
1430 DEFINE_CALLMETHOD(jboolean, Boolean, T_BOOLEAN
1431 , HOTSPOT_JNI_CALLBOOLEANMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1432 HOTSPOT_JNI_CALLBOOLEANMETHOD_RETURN(_ret_ref))
1433 DEFINE_CALLMETHOD(jbyte, Byte, T_BYTE
1434 , HOTSPOT_JNI_CALLBYTEMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1435 HOTSPOT_JNI_CALLBYTEMETHOD_RETURN(_ret_ref))
1436 DEFINE_CALLMETHOD(jchar, Char, T_CHAR
1437 , HOTSPOT_JNI_CALLCHARMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1438 HOTSPOT_JNI_CALLCHARMETHOD_RETURN(_ret_ref))
1439 DEFINE_CALLMETHOD(jshort, Short, T_SHORT
1440 , HOTSPOT_JNI_CALLSHORTMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1441 HOTSPOT_JNI_CALLSHORTMETHOD_RETURN(_ret_ref))
1442
1443 DEFINE_CALLMETHOD(jobject, Object, T_OBJECT
1444 , HOTSPOT_JNI_CALLOBJECTMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1445 HOTSPOT_JNI_CALLOBJECTMETHOD_RETURN(_ret_ref))
1446 DEFINE_CALLMETHOD(jint, Int, T_INT,
1447 HOTSPOT_JNI_CALLINTMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1448 HOTSPOT_JNI_CALLINTMETHOD_RETURN(_ret_ref))
1449 DEFINE_CALLMETHOD(jlong, Long, T_LONG
1450 , HOTSPOT_JNI_CALLLONGMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1451 HOTSPOT_JNI_CALLLONGMETHOD_RETURN(_ret_ref))
1452 // Float and double probes don't return value because dtrace doesn't currently support it
1453 DEFINE_CALLMETHOD(jfloat, Float, T_FLOAT
1454 , HOTSPOT_JNI_CALLFLOATMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1455 HOTSPOT_JNI_CALLFLOATMETHOD_RETURN())
1456 DEFINE_CALLMETHOD(jdouble, Double, T_DOUBLE
1457 , HOTSPOT_JNI_CALLDOUBLEMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1458 HOTSPOT_JNI_CALLDOUBLEMETHOD_RETURN())
1459
1460 #define DEFINE_CALLMETHODV(ResultType, Result, Tag \
1461 , EntryProbe, ReturnProbe) \
1462 \
1463 DT_RETURN_MARK_DECL_FOR(Result, Call##Result##MethodV, ResultType \
1464 , ReturnProbe); \
1465 \
1466 JNI_ENTRY(ResultType, \
1467 jni_Call##Result##MethodV(JNIEnv *env, jobject obj, jmethodID methodID, va_list args)) \
1468 JNIWrapper("Call" XSTR(Result) "MethodV"); \
1469 \
1470 EntryProbe;\
1471 ResultType ret = 0;\
1472 DT_RETURN_MARK_FOR(Result, Call##Result##MethodV, ResultType, \
1473 (const ResultType&)ret);\
1474 \
1475 JavaValue jvalue(Tag); \
1476 JNI_ArgumentPusherVaArg ap(methodID, args); \
1477 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK_0); \
1478 ret = jvalue.get_##ResultType(); \
1479 return ret;\
1480 JNI_END
1481
1482 // the runtime type of subword integral basic types is integer
1483 DEFINE_CALLMETHODV(jboolean, Boolean, T_BOOLEAN
1484 , HOTSPOT_JNI_CALLBOOLEANMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1485 HOTSPOT_JNI_CALLBOOLEANMETHODV_RETURN(_ret_ref))
1486 DEFINE_CALLMETHODV(jbyte, Byte, T_BYTE
1487 , HOTSPOT_JNI_CALLBYTEMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1488 HOTSPOT_JNI_CALLBYTEMETHODV_RETURN(_ret_ref))
1489 DEFINE_CALLMETHODV(jchar, Char, T_CHAR
1490 , HOTSPOT_JNI_CALLCHARMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1491 HOTSPOT_JNI_CALLCHARMETHODV_RETURN(_ret_ref))
1492 DEFINE_CALLMETHODV(jshort, Short, T_SHORT
1493 , HOTSPOT_JNI_CALLSHORTMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1494 HOTSPOT_JNI_CALLSHORTMETHODV_RETURN(_ret_ref))
1495
1496 DEFINE_CALLMETHODV(jobject, Object, T_OBJECT
1497 , HOTSPOT_JNI_CALLOBJECTMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1498 HOTSPOT_JNI_CALLOBJECTMETHODV_RETURN(_ret_ref))
1499 DEFINE_CALLMETHODV(jint, Int, T_INT,
1500 HOTSPOT_JNI_CALLINTMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1501 HOTSPOT_JNI_CALLINTMETHODV_RETURN(_ret_ref))
1502 DEFINE_CALLMETHODV(jlong, Long, T_LONG
1503 , HOTSPOT_JNI_CALLLONGMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1504 HOTSPOT_JNI_CALLLONGMETHODV_RETURN(_ret_ref))
1505 // Float and double probes don't return value because dtrace doesn't currently support it
1506 DEFINE_CALLMETHODV(jfloat, Float, T_FLOAT
1507 , HOTSPOT_JNI_CALLFLOATMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1508 HOTSPOT_JNI_CALLFLOATMETHODV_RETURN())
1509 DEFINE_CALLMETHODV(jdouble, Double, T_DOUBLE
1510 , HOTSPOT_JNI_CALLDOUBLEMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1511 HOTSPOT_JNI_CALLDOUBLEMETHODV_RETURN())
1512
1513 #define DEFINE_CALLMETHODA(ResultType, Result, Tag \
1514 , EntryProbe, ReturnProbe) \
1515 \
1516 DT_RETURN_MARK_DECL_FOR(Result, Call##Result##MethodA, ResultType \
1517 , ReturnProbe); \
1518 \
1519 JNI_ENTRY(ResultType, \
1520 jni_Call##Result##MethodA(JNIEnv *env, jobject obj, jmethodID methodID, const jvalue *args)) \
1521 JNIWrapper("Call" XSTR(Result) "MethodA"); \
1522 EntryProbe; \
1523 ResultType ret = 0;\
1524 DT_RETURN_MARK_FOR(Result, Call##Result##MethodA, ResultType, \
1525 (const ResultType&)ret);\
1526 \
1527 JavaValue jvalue(Tag); \
1528 JNI_ArgumentPusherArray ap(methodID, args); \
1529 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK_0); \
1530 ret = jvalue.get_##ResultType(); \
1531 return ret;\
1532 JNI_END
1533
1534 // the runtime type of subword integral basic types is integer
1535 DEFINE_CALLMETHODA(jboolean, Boolean, T_BOOLEAN
1536 , HOTSPOT_JNI_CALLBOOLEANMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1537 HOTSPOT_JNI_CALLBOOLEANMETHODA_RETURN(_ret_ref))
1538 DEFINE_CALLMETHODA(jbyte, Byte, T_BYTE
1539 , HOTSPOT_JNI_CALLBYTEMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1540 HOTSPOT_JNI_CALLBYTEMETHODA_RETURN(_ret_ref))
1541 DEFINE_CALLMETHODA(jchar, Char, T_CHAR
1542 , HOTSPOT_JNI_CALLCHARMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1543 HOTSPOT_JNI_CALLCHARMETHODA_RETURN(_ret_ref))
1544 DEFINE_CALLMETHODA(jshort, Short, T_SHORT
1545 , HOTSPOT_JNI_CALLSHORTMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1546 HOTSPOT_JNI_CALLSHORTMETHODA_RETURN(_ret_ref))
1547
1548 DEFINE_CALLMETHODA(jobject, Object, T_OBJECT
1549 , HOTSPOT_JNI_CALLOBJECTMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1550 HOTSPOT_JNI_CALLOBJECTMETHODA_RETURN(_ret_ref))
1551 DEFINE_CALLMETHODA(jint, Int, T_INT,
1552 HOTSPOT_JNI_CALLINTMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1553 HOTSPOT_JNI_CALLINTMETHODA_RETURN(_ret_ref))
1554 DEFINE_CALLMETHODA(jlong, Long, T_LONG
1555 , HOTSPOT_JNI_CALLLONGMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1556 HOTSPOT_JNI_CALLLONGMETHODA_RETURN(_ret_ref))
1557 // Float and double probes don't return value because dtrace doesn't currently support it
1558 DEFINE_CALLMETHODA(jfloat, Float, T_FLOAT
1559 , HOTSPOT_JNI_CALLFLOATMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1560 HOTSPOT_JNI_CALLFLOATMETHODA_RETURN())
1561 DEFINE_CALLMETHODA(jdouble, Double, T_DOUBLE
1562 , HOTSPOT_JNI_CALLDOUBLEMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1563 HOTSPOT_JNI_CALLDOUBLEMETHODA_RETURN())
1564
1565 DT_VOID_RETURN_MARK_DECL(CallVoidMethod, HOTSPOT_JNI_CALLVOIDMETHOD_RETURN());
1566 DT_VOID_RETURN_MARK_DECL(CallVoidMethodV, HOTSPOT_JNI_CALLVOIDMETHODV_RETURN());
1567 DT_VOID_RETURN_MARK_DECL(CallVoidMethodA, HOTSPOT_JNI_CALLVOIDMETHODA_RETURN());
1568
1569
1570 JNI_ENTRY(void, jni_CallVoidMethod(JNIEnv *env, jobject obj, jmethodID methodID, ...))
1571 JNIWrapper("CallVoidMethod");
1572 HOTSPOT_JNI_CALLVOIDMETHOD_ENTRY(env, obj, (uintptr_t) methodID);
1573 DT_VOID_RETURN_MARK(CallVoidMethod);
1574
1575 va_list args;
1576 va_start(args, methodID);
1577 JavaValue jvalue(T_VOID);
1578 JNI_ArgumentPusherVaArg ap(methodID, args);
1579 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK);
1580 va_end(args);
1581 JNI_END
1582
1583
1584 JNI_ENTRY(void, jni_CallVoidMethodV(JNIEnv *env, jobject obj, jmethodID methodID, va_list args))
1585 JNIWrapper("CallVoidMethodV");
1586 HOTSPOT_JNI_CALLVOIDMETHODV_ENTRY(env, obj, (uintptr_t) methodID);
1587 DT_VOID_RETURN_MARK(CallVoidMethodV);
1588
1589 JavaValue jvalue(T_VOID);
1590 JNI_ArgumentPusherVaArg ap(methodID, args);
1591 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK);
1592 JNI_END
1593
1594
1595 JNI_ENTRY(void, jni_CallVoidMethodA(JNIEnv *env, jobject obj, jmethodID methodID, const jvalue *args))
1596 JNIWrapper("CallVoidMethodA");
1597 HOTSPOT_JNI_CALLVOIDMETHODA_ENTRY(env, obj, (uintptr_t) methodID);
1598 DT_VOID_RETURN_MARK(CallVoidMethodA);
1599
1600 JavaValue jvalue(T_VOID);
1601 JNI_ArgumentPusherArray ap(methodID, args);
1602 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK);
1603 JNI_END
1604
1605
1606
1607 #define DEFINE_CALLNONVIRTUALMETHOD(ResultType, Result, Tag \
1608 , EntryProbe, ReturnProbe) \
1609 \
1610 DT_RETURN_MARK_DECL_FOR(Result, CallNonvirtual##Result##Method, ResultType \
1611 , ReturnProbe);\
1612 \
1613 JNI_ENTRY(ResultType, \
1614 jni_CallNonvirtual##Result##Method(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, ...)) \
1615 JNIWrapper("CallNonvitual" XSTR(Result) "Method"); \
1616 \
1617 EntryProbe;\
1618 ResultType ret;\
1619 DT_RETURN_MARK_FOR(Result, CallNonvirtual##Result##Method, ResultType, \
1620 (const ResultType&)ret);\
1621 \
1622 va_list args; \
1623 va_start(args, methodID); \
1624 JavaValue jvalue(Tag); \
1625 JNI_ArgumentPusherVaArg ap(methodID, args); \
1626 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_0); \
1627 va_end(args); \
1628 ret = jvalue.get_##ResultType(); \
1629 return ret;\
1630 JNI_END
1631
1632 // the runtime type of subword integral basic types is integer
1633 DEFINE_CALLNONVIRTUALMETHOD(jboolean, Boolean, T_BOOLEAN
1634 , HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1635 HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHOD_RETURN(_ret_ref))
1636 DEFINE_CALLNONVIRTUALMETHOD(jbyte, Byte, T_BYTE
1637 , HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1638 HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHOD_RETURN(_ret_ref))
1639 DEFINE_CALLNONVIRTUALMETHOD(jchar, Char, T_CHAR
1640 , HOTSPOT_JNI_CALLNONVIRTUALCHARMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1641 HOTSPOT_JNI_CALLNONVIRTUALCHARMETHOD_RETURN(_ret_ref))
1642 DEFINE_CALLNONVIRTUALMETHOD(jshort, Short, T_SHORT
1643 , HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1644 HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHOD_RETURN(_ret_ref))
1645
1646 DEFINE_CALLNONVIRTUALMETHOD(jobject, Object, T_OBJECT
1647 , HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1648 HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHOD_RETURN(_ret_ref))
1649 DEFINE_CALLNONVIRTUALMETHOD(jint, Int, T_INT
1650 , HOTSPOT_JNI_CALLNONVIRTUALINTMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1651 HOTSPOT_JNI_CALLNONVIRTUALINTMETHOD_RETURN(_ret_ref))
1652 DEFINE_CALLNONVIRTUALMETHOD(jlong, Long, T_LONG
1653 , HOTSPOT_JNI_CALLNONVIRTUALLONGMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1654 // Float and double probes don't return value because dtrace doesn't currently support it
1655 HOTSPOT_JNI_CALLNONVIRTUALLONGMETHOD_RETURN(_ret_ref))
1656 DEFINE_CALLNONVIRTUALMETHOD(jfloat, Float, T_FLOAT
1657 , HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1658 HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHOD_RETURN())
1659 DEFINE_CALLNONVIRTUALMETHOD(jdouble, Double, T_DOUBLE
1660 , HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1661 HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHOD_RETURN())
1662
1663 #define DEFINE_CALLNONVIRTUALMETHODV(ResultType, Result, Tag \
1664 , EntryProbe, ReturnProbe) \
1665 \
1666 DT_RETURN_MARK_DECL_FOR(Result, CallNonvirtual##Result##MethodV, ResultType \
1667 , ReturnProbe);\
1668 \
1669 JNI_ENTRY(ResultType, \
1670 jni_CallNonvirtual##Result##MethodV(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, va_list args)) \
1671 JNIWrapper("CallNonvitual" XSTR(Result) "MethodV"); \
1672 \
1673 EntryProbe;\
1674 ResultType ret;\
1675 DT_RETURN_MARK_FOR(Result, CallNonvirtual##Result##MethodV, ResultType, \
1676 (const ResultType&)ret);\
1677 \
1678 JavaValue jvalue(Tag); \
1679 JNI_ArgumentPusherVaArg ap(methodID, args); \
1680 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_0); \
1681 ret = jvalue.get_##ResultType(); \
1682 return ret;\
1683 JNI_END
1684
1685 // the runtime type of subword integral basic types is integer
1686 DEFINE_CALLNONVIRTUALMETHODV(jboolean, Boolean, T_BOOLEAN
1687 , HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1688 HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHODV_RETURN(_ret_ref))
1689 DEFINE_CALLNONVIRTUALMETHODV(jbyte, Byte, T_BYTE
1690 , HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1691 HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHODV_RETURN(_ret_ref))
1692 DEFINE_CALLNONVIRTUALMETHODV(jchar, Char, T_CHAR
1693 , HOTSPOT_JNI_CALLNONVIRTUALCHARMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1694 HOTSPOT_JNI_CALLNONVIRTUALCHARMETHODV_RETURN(_ret_ref))
1695 DEFINE_CALLNONVIRTUALMETHODV(jshort, Short, T_SHORT
1696 , HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1697 HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHODV_RETURN(_ret_ref))
1698
1699 DEFINE_CALLNONVIRTUALMETHODV(jobject, Object, T_OBJECT
1700 , HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1701 HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHODV_RETURN(_ret_ref))
1702 DEFINE_CALLNONVIRTUALMETHODV(jint, Int, T_INT
1703 , HOTSPOT_JNI_CALLNONVIRTUALINTMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1704 HOTSPOT_JNI_CALLNONVIRTUALINTMETHODV_RETURN(_ret_ref))
1705 DEFINE_CALLNONVIRTUALMETHODV(jlong, Long, T_LONG
1706 , HOTSPOT_JNI_CALLNONVIRTUALLONGMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1707 // Float and double probes don't return value because dtrace doesn't currently support it
1708 HOTSPOT_JNI_CALLNONVIRTUALLONGMETHODV_RETURN(_ret_ref))
1709 DEFINE_CALLNONVIRTUALMETHODV(jfloat, Float, T_FLOAT
1710 , HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1711 HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHODV_RETURN())
1712 DEFINE_CALLNONVIRTUALMETHODV(jdouble, Double, T_DOUBLE
1713 , HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1714 HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHODV_RETURN())
1715
1716 #define DEFINE_CALLNONVIRTUALMETHODA(ResultType, Result, Tag \
1717 , EntryProbe, ReturnProbe) \
1718 \
1719 DT_RETURN_MARK_DECL_FOR(Result, CallNonvirtual##Result##MethodA, ResultType \
1720 , ReturnProbe);\
1721 \
1722 JNI_ENTRY(ResultType, \
1723 jni_CallNonvirtual##Result##MethodA(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, const jvalue *args)) \
1724 JNIWrapper("CallNonvitual" XSTR(Result) "MethodA"); \
1725 \
1726 EntryProbe;\
1727 ResultType ret;\
1728 DT_RETURN_MARK_FOR(Result, CallNonvirtual##Result##MethodA, ResultType, \
1729 (const ResultType&)ret);\
1730 \
1731 JavaValue jvalue(Tag); \
1732 JNI_ArgumentPusherArray ap(methodID, args); \
1733 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_0); \
1734 ret = jvalue.get_##ResultType(); \
1735 return ret;\
1736 JNI_END
1737
1738 // the runtime type of subword integral basic types is integer
1739 DEFINE_CALLNONVIRTUALMETHODA(jboolean, Boolean, T_BOOLEAN
1740 , HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1741 HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHODA_RETURN(_ret_ref))
1742 DEFINE_CALLNONVIRTUALMETHODA(jbyte, Byte, T_BYTE
1743 , HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1744 HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHODA_RETURN(_ret_ref))
1745 DEFINE_CALLNONVIRTUALMETHODA(jchar, Char, T_CHAR
1746 , HOTSPOT_JNI_CALLNONVIRTUALCHARMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1747 HOTSPOT_JNI_CALLNONVIRTUALCHARMETHODA_RETURN(_ret_ref))
1748 DEFINE_CALLNONVIRTUALMETHODA(jshort, Short, T_SHORT
1749 , HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1750 HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHODA_RETURN(_ret_ref))
1751
1752 DEFINE_CALLNONVIRTUALMETHODA(jobject, Object, T_OBJECT
1753 , HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1754 HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHODA_RETURN(_ret_ref))
1755 DEFINE_CALLNONVIRTUALMETHODA(jint, Int, T_INT
1756 , HOTSPOT_JNI_CALLNONVIRTUALINTMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1757 HOTSPOT_JNI_CALLNONVIRTUALINTMETHODA_RETURN(_ret_ref))
1758 DEFINE_CALLNONVIRTUALMETHODA(jlong, Long, T_LONG
1759 , HOTSPOT_JNI_CALLNONVIRTUALLONGMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1760 // Float and double probes don't return value because dtrace doesn't currently support it
1761 HOTSPOT_JNI_CALLNONVIRTUALLONGMETHODA_RETURN(_ret_ref))
1762 DEFINE_CALLNONVIRTUALMETHODA(jfloat, Float, T_FLOAT
1763 , HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1764 HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHODA_RETURN())
1765 DEFINE_CALLNONVIRTUALMETHODA(jdouble, Double, T_DOUBLE
1766 , HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1767 HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHODA_RETURN())
1768
1769 DT_VOID_RETURN_MARK_DECL(CallNonvirtualVoidMethod
1770 , HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHOD_RETURN());
1771 DT_VOID_RETURN_MARK_DECL(CallNonvirtualVoidMethodV
1772 , HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHODV_RETURN());
1773 DT_VOID_RETURN_MARK_DECL(CallNonvirtualVoidMethodA
1774 , HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHODA_RETURN());
1775
1776 JNI_ENTRY(void, jni_CallNonvirtualVoidMethod(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, ...))
1777 JNIWrapper("CallNonvirtualVoidMethod");
1778
1779 HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHOD_ENTRY(env, obj, cls, (uintptr_t) methodID);
1780 DT_VOID_RETURN_MARK(CallNonvirtualVoidMethod);
1781
1782 va_list args;
1783 va_start(args, methodID);
1784 JavaValue jvalue(T_VOID);
1785 JNI_ArgumentPusherVaArg ap(methodID, args);
1786 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK);
1787 va_end(args);
1788 JNI_END
1789
1790
1791 JNI_ENTRY(void, jni_CallNonvirtualVoidMethodV(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, va_list args))
1792 JNIWrapper("CallNonvirtualVoidMethodV");
1793
1794 HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHODV_ENTRY(
1795 env, obj, cls, (uintptr_t) methodID);
1796 DT_VOID_RETURN_MARK(CallNonvirtualVoidMethodV);
1797
1798 JavaValue jvalue(T_VOID);
1799 JNI_ArgumentPusherVaArg ap(methodID, args);
1800 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK);
1801 JNI_END
1802
1803
1804 JNI_ENTRY(void, jni_CallNonvirtualVoidMethodA(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, const jvalue *args))
1805 JNIWrapper("CallNonvirtualVoidMethodA");
1806 HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHODA_ENTRY(
1807 env, obj, cls, (uintptr_t) methodID);
1808 DT_VOID_RETURN_MARK(CallNonvirtualVoidMethodA);
1809 JavaValue jvalue(T_VOID);
1810 JNI_ArgumentPusherArray ap(methodID, args);
1811 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK);
1812 JNI_END
1813
1814
1815
1816 #define DEFINE_CALLSTATICMETHOD(ResultType, Result, Tag \
1817 , EntryProbe, ResultProbe) \
1818 \
1819 DT_RETURN_MARK_DECL_FOR(Result, CallStatic##Result##Method, ResultType \
1820 , ResultProbe); \
1821 \
1822 JNI_ENTRY(ResultType, \
1823 jni_CallStatic##Result##Method(JNIEnv *env, jclass cls, jmethodID methodID, ...)) \
1824 JNIWrapper("CallStatic" XSTR(Result) "Method"); \
1825 \
1826 EntryProbe; \
1827 ResultType ret = 0;\
1828 DT_RETURN_MARK_FOR(Result, CallStatic##Result##Method, ResultType, \
1829 (const ResultType&)ret);\
1830 \
1831 va_list args; \
1832 va_start(args, methodID); \
1833 JavaValue jvalue(Tag); \
1834 JNI_ArgumentPusherVaArg ap(methodID, args); \
1835 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK_0); \
1836 va_end(args); \
1837 ret = jvalue.get_##ResultType(); \
1838 return ret;\
1839 JNI_END
1840
1841 // the runtime type of subword integral basic types is integer
1842 DEFINE_CALLSTATICMETHOD(jboolean, Boolean, T_BOOLEAN
1843 , HOTSPOT_JNI_CALLSTATICBOOLEANMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1844 HOTSPOT_JNI_CALLSTATICBOOLEANMETHOD_RETURN(_ret_ref));
1845 DEFINE_CALLSTATICMETHOD(jbyte, Byte, T_BYTE
1846 , HOTSPOT_JNI_CALLSTATICBYTEMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1847 HOTSPOT_JNI_CALLSTATICBYTEMETHOD_RETURN(_ret_ref));
1848 DEFINE_CALLSTATICMETHOD(jchar, Char, T_CHAR
1849 , HOTSPOT_JNI_CALLSTATICCHARMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1850 HOTSPOT_JNI_CALLSTATICCHARMETHOD_RETURN(_ret_ref));
1851 DEFINE_CALLSTATICMETHOD(jshort, Short, T_SHORT
1852 , HOTSPOT_JNI_CALLSTATICSHORTMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1853 HOTSPOT_JNI_CALLSTATICSHORTMETHOD_RETURN(_ret_ref));
1854
1855 DEFINE_CALLSTATICMETHOD(jobject, Object, T_OBJECT
1856 , HOTSPOT_JNI_CALLSTATICOBJECTMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1857 HOTSPOT_JNI_CALLSTATICOBJECTMETHOD_RETURN(_ret_ref));
1858 DEFINE_CALLSTATICMETHOD(jint, Int, T_INT
1859 , HOTSPOT_JNI_CALLSTATICINTMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1860 HOTSPOT_JNI_CALLSTATICINTMETHOD_RETURN(_ret_ref));
1861 DEFINE_CALLSTATICMETHOD(jlong, Long, T_LONG
1862 , HOTSPOT_JNI_CALLSTATICLONGMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1863 HOTSPOT_JNI_CALLSTATICLONGMETHOD_RETURN(_ret_ref));
1864 // Float and double probes don't return value because dtrace doesn't currently support it
1865 DEFINE_CALLSTATICMETHOD(jfloat, Float, T_FLOAT
1866 , HOTSPOT_JNI_CALLSTATICFLOATMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1867 HOTSPOT_JNI_CALLSTATICFLOATMETHOD_RETURN());
1868 DEFINE_CALLSTATICMETHOD(jdouble, Double, T_DOUBLE
1869 , HOTSPOT_JNI_CALLSTATICDOUBLEMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1870 HOTSPOT_JNI_CALLSTATICDOUBLEMETHOD_RETURN());
1871
1872 #define DEFINE_CALLSTATICMETHODV(ResultType, Result, Tag \
1873 , EntryProbe, ResultProbe) \
1874 \
1875 DT_RETURN_MARK_DECL_FOR(Result, CallStatic##Result##MethodV, ResultType \
1876 , ResultProbe); \
1877 \
1878 JNI_ENTRY(ResultType, \
1879 jni_CallStatic##Result##MethodV(JNIEnv *env, jclass cls, jmethodID methodID, va_list args)) \
1880 JNIWrapper("CallStatic" XSTR(Result) "MethodV"); \
1881 \
1882 EntryProbe; \
1883 ResultType ret = 0;\
1884 DT_RETURN_MARK_FOR(Result, CallStatic##Result##MethodV, ResultType, \
1885 (const ResultType&)ret);\
1886 \
1887 JavaValue jvalue(Tag); \
1888 JNI_ArgumentPusherVaArg ap(methodID, args); \
1889 /* Make sure class is initialized before trying to invoke its method */ \
1890 KlassHandle k(THREAD, java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls))); \
1891 k()->initialize(CHECK_0); \
1892 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK_0); \
1893 va_end(args); \
1894 ret = jvalue.get_##ResultType(); \
1895 return ret;\
1896 JNI_END
1897
1898 // the runtime type of subword integral basic types is integer
1899 DEFINE_CALLSTATICMETHODV(jboolean, Boolean, T_BOOLEAN
1900 , HOTSPOT_JNI_CALLSTATICBOOLEANMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1901 HOTSPOT_JNI_CALLSTATICBOOLEANMETHODV_RETURN(_ret_ref));
1902 DEFINE_CALLSTATICMETHODV(jbyte, Byte, T_BYTE
1903 , HOTSPOT_JNI_CALLSTATICBYTEMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1904 HOTSPOT_JNI_CALLSTATICBYTEMETHODV_RETURN(_ret_ref));
1905 DEFINE_CALLSTATICMETHODV(jchar, Char, T_CHAR
1906 , HOTSPOT_JNI_CALLSTATICCHARMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1907 HOTSPOT_JNI_CALLSTATICCHARMETHODV_RETURN(_ret_ref));
1908 DEFINE_CALLSTATICMETHODV(jshort, Short, T_SHORT
1909 , HOTSPOT_JNI_CALLSTATICSHORTMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1910 HOTSPOT_JNI_CALLSTATICSHORTMETHODV_RETURN(_ret_ref));
1911
1912 DEFINE_CALLSTATICMETHODV(jobject, Object, T_OBJECT
1913 , HOTSPOT_JNI_CALLSTATICOBJECTMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1914 HOTSPOT_JNI_CALLSTATICOBJECTMETHODV_RETURN(_ret_ref));
1915 DEFINE_CALLSTATICMETHODV(jint, Int, T_INT
1916 , HOTSPOT_JNI_CALLSTATICINTMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1917 HOTSPOT_JNI_CALLSTATICINTMETHODV_RETURN(_ret_ref));
1918 DEFINE_CALLSTATICMETHODV(jlong, Long, T_LONG
1919 , HOTSPOT_JNI_CALLSTATICLONGMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1920 HOTSPOT_JNI_CALLSTATICLONGMETHODV_RETURN(_ret_ref));
1921 // Float and double probes don't return value because dtrace doesn't currently support it
1922 DEFINE_CALLSTATICMETHODV(jfloat, Float, T_FLOAT
1923 , HOTSPOT_JNI_CALLSTATICFLOATMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1924 HOTSPOT_JNI_CALLSTATICFLOATMETHODV_RETURN());
1925 DEFINE_CALLSTATICMETHODV(jdouble, Double, T_DOUBLE
1926 , HOTSPOT_JNI_CALLSTATICDOUBLEMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1927 HOTSPOT_JNI_CALLSTATICDOUBLEMETHODV_RETURN());
1928
1929 #define DEFINE_CALLSTATICMETHODA(ResultType, Result, Tag \
1930 , EntryProbe, ResultProbe) \
1931 \
1932 DT_RETURN_MARK_DECL_FOR(Result, CallStatic##Result##MethodA, ResultType \
1933 , ResultProbe); \
1934 \
1935 JNI_ENTRY(ResultType, \
1936 jni_CallStatic##Result##MethodA(JNIEnv *env, jclass cls, jmethodID methodID, const jvalue *args)) \
1937 JNIWrapper("CallStatic" XSTR(Result) "MethodA"); \
1938 \
1939 EntryProbe; \
1940 ResultType ret = 0;\
1941 DT_RETURN_MARK_FOR(Result, CallStatic##Result##MethodA, ResultType, \
1942 (const ResultType&)ret);\
1943 \
1944 JavaValue jvalue(Tag); \
1945 JNI_ArgumentPusherArray ap(methodID, args); \
1946 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK_0); \
1947 ret = jvalue.get_##ResultType(); \
1948 return ret;\
1949 JNI_END
1950
1951 // the runtime type of subword integral basic types is integer
1952 DEFINE_CALLSTATICMETHODA(jboolean, Boolean, T_BOOLEAN
1953 , HOTSPOT_JNI_CALLSTATICBOOLEANMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1954 HOTSPOT_JNI_CALLSTATICBOOLEANMETHODA_RETURN(_ret_ref));
1955 DEFINE_CALLSTATICMETHODA(jbyte, Byte, T_BYTE
1956 , HOTSPOT_JNI_CALLSTATICBYTEMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1957 HOTSPOT_JNI_CALLSTATICBYTEMETHODA_RETURN(_ret_ref));
1958 DEFINE_CALLSTATICMETHODA(jchar, Char, T_CHAR
1959 , HOTSPOT_JNI_CALLSTATICCHARMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1960 HOTSPOT_JNI_CALLSTATICCHARMETHODA_RETURN(_ret_ref));
1961 DEFINE_CALLSTATICMETHODA(jshort, Short, T_SHORT
1962 , HOTSPOT_JNI_CALLSTATICSHORTMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1963 HOTSPOT_JNI_CALLSTATICSHORTMETHODA_RETURN(_ret_ref));
1964
1965 DEFINE_CALLSTATICMETHODA(jobject, Object, T_OBJECT
1966 , HOTSPOT_JNI_CALLSTATICOBJECTMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1967 HOTSPOT_JNI_CALLSTATICOBJECTMETHODA_RETURN(_ret_ref));
1968 DEFINE_CALLSTATICMETHODA(jint, Int, T_INT
1969 , HOTSPOT_JNI_CALLSTATICINTMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1970 HOTSPOT_JNI_CALLSTATICINTMETHODA_RETURN(_ret_ref));
1971 DEFINE_CALLSTATICMETHODA(jlong, Long, T_LONG
1972 , HOTSPOT_JNI_CALLSTATICLONGMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1973 HOTSPOT_JNI_CALLSTATICLONGMETHODA_RETURN(_ret_ref));
1974 // Float and double probes don't return value because dtrace doesn't currently support it
1975 DEFINE_CALLSTATICMETHODA(jfloat, Float, T_FLOAT
1976 , HOTSPOT_JNI_CALLSTATICFLOATMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1977 HOTSPOT_JNI_CALLSTATICFLOATMETHODA_RETURN());
1978 DEFINE_CALLSTATICMETHODA(jdouble, Double, T_DOUBLE
1979 , HOTSPOT_JNI_CALLSTATICDOUBLEMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1980 HOTSPOT_JNI_CALLSTATICDOUBLEMETHODA_RETURN());
1981
1982 DT_VOID_RETURN_MARK_DECL(CallStaticVoidMethod
1983 , HOTSPOT_JNI_CALLSTATICVOIDMETHOD_RETURN());
1984 DT_VOID_RETURN_MARK_DECL(CallStaticVoidMethodV
1985 , HOTSPOT_JNI_CALLSTATICVOIDMETHODV_RETURN());
1986 DT_VOID_RETURN_MARK_DECL(CallStaticVoidMethodA
1987 , HOTSPOT_JNI_CALLSTATICVOIDMETHODA_RETURN());
1988
1989 JNI_ENTRY(void, jni_CallStaticVoidMethod(JNIEnv *env, jclass cls, jmethodID methodID, ...))
1990 JNIWrapper("CallStaticVoidMethod");
1991 HOTSPOT_JNI_CALLSTATICVOIDMETHOD_ENTRY(env, cls, (uintptr_t) methodID);
1992 DT_VOID_RETURN_MARK(CallStaticVoidMethod);
1993
1994 va_list args;
1995 va_start(args, methodID);
1996 JavaValue jvalue(T_VOID);
1997 JNI_ArgumentPusherVaArg ap(methodID, args);
1998 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK);
1999 va_end(args);
2000 JNI_END
2001
2002
2003 JNI_ENTRY(void, jni_CallStaticVoidMethodV(JNIEnv *env, jclass cls, jmethodID methodID, va_list args))
2004 JNIWrapper("CallStaticVoidMethodV");
2005 HOTSPOT_JNI_CALLSTATICVOIDMETHODV_ENTRY(env, cls, (uintptr_t) methodID);
2006 DT_VOID_RETURN_MARK(CallStaticVoidMethodV);
2007
2008 JavaValue jvalue(T_VOID);
2009 JNI_ArgumentPusherVaArg ap(methodID, args);
2010 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK);
2011 JNI_END
2012
2013
2014 JNI_ENTRY(void, jni_CallStaticVoidMethodA(JNIEnv *env, jclass cls, jmethodID methodID, const jvalue *args))
2015 JNIWrapper("CallStaticVoidMethodA");
2016 HOTSPOT_JNI_CALLSTATICVOIDMETHODA_ENTRY(env, cls, (uintptr_t) methodID);
2017 DT_VOID_RETURN_MARK(CallStaticVoidMethodA);
2018
2019 JavaValue jvalue(T_VOID);
2020 JNI_ArgumentPusherArray ap(methodID, args);
2021 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK);
2022 JNI_END
2023
2024
2025 //
2026 // Accessing Fields
2027 //
2028
2029
2030 DT_RETURN_MARK_DECL(GetFieldID, jfieldID
2031 , HOTSPOT_JNI_GETFIELDID_RETURN((uintptr_t)_ret_ref));
2032
2033 JNI_ENTRY(jfieldID, jni_GetFieldID(JNIEnv *env, jclass clazz,
2034 const char *name, const char *sig))
2035 JNIWrapper("GetFieldID");
2036 HOTSPOT_JNI_GETFIELDID_ENTRY(env, clazz, (char *) name, (char *) sig);
2037 jfieldID ret = 0;
2038 DT_RETURN_MARK(GetFieldID, jfieldID, (const jfieldID&)ret);
2039
2040 // The class should have been loaded (we have an instance of the class
2041 // passed in) so the field and signature should already be in the symbol
2042 // table. If they're not there, the field doesn't exist.
2043 TempNewSymbol fieldname = SymbolTable::probe(name, (int)strlen(name));
2044 TempNewSymbol signame = SymbolTable::probe(sig, (int)strlen(sig));
2045 if (fieldname == NULL || signame == NULL) {
2046 THROW_MSG_0(vmSymbols::java_lang_NoSuchFieldError(), (char*) name);
2047 }
2048 KlassHandle k(THREAD,
2049 java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz)));
2050 // Make sure class is initialized before handing id's out to fields
2051 k()->initialize(CHECK_NULL);
2052
2053 fieldDescriptor fd;
2054 if (!k()->oop_is_instance() ||
2055 !InstanceKlass::cast(k())->find_field(fieldname, signame, false, &fd)) {
2056 THROW_MSG_0(vmSymbols::java_lang_NoSuchFieldError(), (char*) name);
2057 }
2058
2059 // A jfieldID for a non-static field is simply the offset of the field within the instanceOop
2060 // It may also have hash bits for k, if VerifyJNIFields is turned on.
2061 ret = jfieldIDWorkaround::to_instance_jfieldID(k(), fd.offset());
2062 return ret;
2063 JNI_END
2064
2065
2066 JNI_ENTRY(jobject, jni_GetObjectField(JNIEnv *env, jobject obj, jfieldID fieldID))
2067 JNIWrapper("GetObjectField");
2068 HOTSPOT_JNI_GETOBJECTFIELD_ENTRY(env, obj, (uintptr_t) fieldID);
2069 oop o = JNIHandles::resolve_non_null(obj);
2070 Klass* k = o->klass();
2071 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID);
2072 // Keep JVMTI addition small and only check enabled flag here.
2073 // jni_GetField_probe() assumes that is okay to create handles.
2074 if (JvmtiExport::should_post_field_access()) {
2075 o = JvmtiExport::jni_GetField_probe(thread, obj, o, k, fieldID, false);
2076 }
2077 jobject ret = JNIHandles::make_local(env, o->obj_field(offset));
2078 #if INCLUDE_ALL_GCS
2079 // If G1 is enabled and we are accessing the value of the referent
2080 // field in a reference object then we need to register a non-null
2081 // referent with the SATB barrier.
2082 if (UseG1GC) {
2083 bool needs_barrier = false;
2084
2085 if (ret != NULL &&
2086 offset == java_lang_ref_Reference::referent_offset &&
2087 InstanceKlass::cast(k)->reference_type() != REF_NONE) {
2088 assert(InstanceKlass::cast(k)->is_subclass_of(SystemDictionary::Reference_klass()), "sanity");
2089 needs_barrier = true;
2090 }
2091
2092 if (needs_barrier) {
2093 oop referent = JNIHandles::resolve(ret);
2094 G1SATBCardTableModRefBS::enqueue(referent);
2095 }
2096 }
2097 #endif // INCLUDE_ALL_GCS
2098 HOTSPOT_JNI_GETOBJECTFIELD_RETURN(ret);
2099 return ret;
2100 JNI_END
2101
2102
2103
2104 #define DEFINE_GETFIELD(Return,Fieldname,Result \
2105 , EntryProbe, ReturnProbe) \
2106 \
2107 DT_RETURN_MARK_DECL_FOR(Result, Get##Result##Field, Return \
2108 , ReturnProbe); \
2109 \
2110 JNI_QUICK_ENTRY(Return, jni_Get##Result##Field(JNIEnv *env, jobject obj, jfieldID fieldID)) \
2111 JNIWrapper("Get" XSTR(Result) "Field"); \
2112 \
2113 EntryProbe; \
2114 Return ret = 0;\
2115 DT_RETURN_MARK_FOR(Result, Get##Result##Field, Return, (const Return&)ret);\
2116 \
2117 oop o = JNIHandles::resolve_non_null(obj); \
2118 Klass* k = o->klass(); \
2119 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID); \
2120 /* Keep JVMTI addition small and only check enabled flag here. */ \
2121 /* jni_GetField_probe_nh() assumes that is not okay to create handles */ \
2122 /* and creates a ResetNoHandleMark. */ \
2123 if (JvmtiExport::should_post_field_access()) { \
2124 o = JvmtiExport::jni_GetField_probe_nh(thread, obj, o, k, fieldID, false); \
2125 } \
2126 ret = o->Fieldname##_field(offset); \
2127 return ret; \
2128 JNI_END
2129
2130 DEFINE_GETFIELD(jboolean, bool, Boolean
2131 , HOTSPOT_JNI_GETBOOLEANFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2132 HOTSPOT_JNI_GETBOOLEANFIELD_RETURN(_ret_ref))
2133 DEFINE_GETFIELD(jbyte, byte, Byte
2134 , HOTSPOT_JNI_GETBYTEFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2135 HOTSPOT_JNI_GETBYTEFIELD_RETURN(_ret_ref))
2136 DEFINE_GETFIELD(jchar, char, Char
2137 , HOTSPOT_JNI_GETCHARFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2138 HOTSPOT_JNI_GETCHARFIELD_RETURN(_ret_ref))
2139 DEFINE_GETFIELD(jshort, short, Short
2140 , HOTSPOT_JNI_GETSHORTFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2141 HOTSPOT_JNI_GETSHORTFIELD_RETURN(_ret_ref))
2142 DEFINE_GETFIELD(jint, int, Int
2143 , HOTSPOT_JNI_GETINTFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2144 HOTSPOT_JNI_GETINTFIELD_RETURN(_ret_ref))
2145 DEFINE_GETFIELD(jlong, long, Long
2146 , HOTSPOT_JNI_GETLONGFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2147 HOTSPOT_JNI_GETLONGFIELD_RETURN(_ret_ref))
2148 // Float and double probes don't return value because dtrace doesn't currently support it
2149 DEFINE_GETFIELD(jfloat, float, Float
2150 , HOTSPOT_JNI_GETFLOATFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2151 HOTSPOT_JNI_GETFLOATFIELD_RETURN())
2152 DEFINE_GETFIELD(jdouble, double, Double
2153 , HOTSPOT_JNI_GETDOUBLEFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2154 HOTSPOT_JNI_GETDOUBLEFIELD_RETURN())
2155
2156 address jni_GetBooleanField_addr() {
2157 return (address)jni_GetBooleanField;
2158 }
2159 address jni_GetByteField_addr() {
2160 return (address)jni_GetByteField;
2161 }
2162 address jni_GetCharField_addr() {
2163 return (address)jni_GetCharField;
2164 }
2165 address jni_GetShortField_addr() {
2166 return (address)jni_GetShortField;
2167 }
2168 address jni_GetIntField_addr() {
2169 return (address)jni_GetIntField;
2170 }
2171 address jni_GetLongField_addr() {
2172 return (address)jni_GetLongField;
2173 }
2174 address jni_GetFloatField_addr() {
2175 return (address)jni_GetFloatField;
2176 }
2177 address jni_GetDoubleField_addr() {
2178 return (address)jni_GetDoubleField;
2179 }
2180
2181 JNI_QUICK_ENTRY(void, jni_SetObjectField(JNIEnv *env, jobject obj, jfieldID fieldID, jobject value))
2182 JNIWrapper("SetObjectField");
2183 HOTSPOT_JNI_SETOBJECTFIELD_ENTRY(env, obj, (uintptr_t) fieldID, value);
2184 oop o = JNIHandles::resolve_non_null(obj);
2185 Klass* k = o->klass();
2186 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID);
2187 // Keep JVMTI addition small and only check enabled flag here.
2188 // jni_SetField_probe_nh() assumes that is not okay to create handles
2189 // and creates a ResetNoHandleMark.
2190 if (JvmtiExport::should_post_field_modification()) {
2191 jvalue field_value;
2192 field_value.l = value;
2193 o = JvmtiExport::jni_SetField_probe_nh(thread, obj, o, k, fieldID, false, 'L', (jvalue *)&field_value);
2194 }
2195 o->obj_field_put(offset, JNIHandles::resolve(value));
2196 HOTSPOT_JNI_SETOBJECTFIELD_RETURN();
2197 JNI_END
2198
2199
2200 #define DEFINE_SETFIELD(Argument,Fieldname,Result,SigType,unionType \
2201 , EntryProbe, ReturnProbe) \
2202 \
2203 JNI_QUICK_ENTRY(void, jni_Set##Result##Field(JNIEnv *env, jobject obj, jfieldID fieldID, Argument value)) \
2204 JNIWrapper("Set" XSTR(Result) "Field"); \
2205 \
2206 EntryProbe; \
2207 \
2208 oop o = JNIHandles::resolve_non_null(obj); \
2209 Klass* k = o->klass(); \
2210 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID); \
2211 /* Keep JVMTI addition small and only check enabled flag here. */ \
2212 /* jni_SetField_probe_nh() assumes that is not okay to create handles */ \
2213 /* and creates a ResetNoHandleMark. */ \
2214 if (JvmtiExport::should_post_field_modification()) { \
2215 jvalue field_value; \
2216 field_value.unionType = value; \
2217 o = JvmtiExport::jni_SetField_probe_nh(thread, obj, o, k, fieldID, false, SigType, (jvalue *)&field_value); \
2218 } \
2219 o->Fieldname##_field_put(offset, value); \
2220 ReturnProbe; \
2221 JNI_END
2222
2223 DEFINE_SETFIELD(jboolean, bool, Boolean, 'Z', z
2224 , HOTSPOT_JNI_SETBOOLEANFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value),
2225 HOTSPOT_JNI_SETBOOLEANFIELD_RETURN())
2226 DEFINE_SETFIELD(jbyte, byte, Byte, 'B', b
2227 , HOTSPOT_JNI_SETBYTEFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value),
2228 HOTSPOT_JNI_SETBYTEFIELD_RETURN())
2229 DEFINE_SETFIELD(jchar, char, Char, 'C', c
2230 , HOTSPOT_JNI_SETCHARFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value),
2231 HOTSPOT_JNI_SETCHARFIELD_RETURN())
2232 DEFINE_SETFIELD(jshort, short, Short, 'S', s
2233 , HOTSPOT_JNI_SETSHORTFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value),
2234 HOTSPOT_JNI_SETSHORTFIELD_RETURN())
2235 DEFINE_SETFIELD(jint, int, Int, 'I', i
2236 , HOTSPOT_JNI_SETINTFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value),
2237 HOTSPOT_JNI_SETINTFIELD_RETURN())
2238 DEFINE_SETFIELD(jlong, long, Long, 'J', j
2239 , HOTSPOT_JNI_SETLONGFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value),
2240 HOTSPOT_JNI_SETLONGFIELD_RETURN())
2241 // Float and double probes don't return value because dtrace doesn't currently support it
2242 DEFINE_SETFIELD(jfloat, float, Float, 'F', f
2243 , HOTSPOT_JNI_SETFLOATFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2244 HOTSPOT_JNI_SETFLOATFIELD_RETURN())
2245 DEFINE_SETFIELD(jdouble, double, Double, 'D', d
2246 , HOTSPOT_JNI_SETDOUBLEFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2247 HOTSPOT_JNI_SETDOUBLEFIELD_RETURN())
2248
2249 DT_RETURN_MARK_DECL(ToReflectedField, jobject
2250 , HOTSPOT_JNI_TOREFLECTEDFIELD_RETURN(_ret_ref));
2251
2252 JNI_ENTRY(jobject, jni_ToReflectedField(JNIEnv *env, jclass cls, jfieldID fieldID, jboolean isStatic))
2253 JNIWrapper("ToReflectedField");
2254 HOTSPOT_JNI_TOREFLECTEDFIELD_ENTRY(env, cls, (uintptr_t) fieldID, isStatic);
2255 jobject ret = NULL;
2256 DT_RETURN_MARK(ToReflectedField, jobject, (const jobject&)ret);
2257
2258 fieldDescriptor fd;
2259 bool found = false;
2260 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2261
2262 assert(jfieldIDWorkaround::is_static_jfieldID(fieldID) == (isStatic != 0), "invalid fieldID");
2263
2264 if (isStatic) {
2265 // Static field. The fieldID a JNIid specifying the field holder and the offset within the Klass*.
2266 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID);
2267 assert(id->is_static_field_id(), "invalid static field id");
2268 found = id->find_local_field(&fd);
2269 } else {
2270 // Non-static field. The fieldID is really the offset of the field within the instanceOop.
2271 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID);
2272 found = InstanceKlass::cast(k)->find_field_from_offset(offset, false, &fd);
2273 }
2274 assert(found, "bad fieldID passed into jni_ToReflectedField");
2275 oop reflected = Reflection::new_field(&fd, CHECK_NULL);
2276 ret = JNIHandles::make_local(env, reflected);
2277 return ret;
2278 JNI_END
2279
2280
2281 //
2282 // Accessing Static Fields
2283 //
2284 DT_RETURN_MARK_DECL(GetStaticFieldID, jfieldID
2285 , HOTSPOT_JNI_GETSTATICFIELDID_RETURN((uintptr_t)_ret_ref));
2286
2287 JNI_ENTRY(jfieldID, jni_GetStaticFieldID(JNIEnv *env, jclass clazz,
2288 const char *name, const char *sig))
2289 JNIWrapper("GetStaticFieldID");
2290 HOTSPOT_JNI_GETSTATICFIELDID_ENTRY(env, clazz, (char *) name, (char *) sig);
2291 jfieldID ret = NULL;
2292 DT_RETURN_MARK(GetStaticFieldID, jfieldID, (const jfieldID&)ret);
2293
2294 // The class should have been loaded (we have an instance of the class
2295 // passed in) so the field and signature should already be in the symbol
2296 // table. If they're not there, the field doesn't exist.
2297 TempNewSymbol fieldname = SymbolTable::probe(name, (int)strlen(name));
2298 TempNewSymbol signame = SymbolTable::probe(sig, (int)strlen(sig));
2299 if (fieldname == NULL || signame == NULL) {
2300 THROW_MSG_0(vmSymbols::java_lang_NoSuchFieldError(), (char*) name);
2301 }
2302 KlassHandle k(THREAD,
2303 java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz)));
2304 // Make sure class is initialized before handing id's out to static fields
2305 k()->initialize(CHECK_NULL);
2306
2307 fieldDescriptor fd;
2308 if (!k()->oop_is_instance() ||
2309 !InstanceKlass::cast(k())->find_field(fieldname, signame, true, &fd)) {
2310 THROW_MSG_0(vmSymbols::java_lang_NoSuchFieldError(), (char*) name);
2311 }
2312
2313 // A jfieldID for a static field is a JNIid specifying the field holder and the offset within the Klass*
2314 JNIid* id = fd.field_holder()->jni_id_for(fd.offset());
2315 debug_only(id->set_is_static_field_id();)
2316
2317 debug_only(id->verify(fd.field_holder()));
2318
2319 ret = jfieldIDWorkaround::to_static_jfieldID(id);
2320 return ret;
2321 JNI_END
2322
2323
2324 JNI_ENTRY(jobject, jni_GetStaticObjectField(JNIEnv *env, jclass clazz, jfieldID fieldID))
2325 JNIWrapper("GetStaticObjectField");
2326 HOTSPOT_JNI_GETSTATICOBJECTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID);
2327 #if INCLUDE_JNI_CHECK
2328 DEBUG_ONLY(Klass* param_k = jniCheck::validate_class(thread, clazz);)
2329 #endif // INCLUDE_JNI_CHECK
2330 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID);
2331 assert(id->is_static_field_id(), "invalid static field id");
2332 // Keep JVMTI addition small and only check enabled flag here.
2333 // jni_GetField_probe() assumes that is okay to create handles.
2334 if (JvmtiExport::should_post_field_access()) {
2335 JvmtiExport::jni_GetField_probe(thread, NULL, NULL, id->holder(), fieldID, true);
2336 }
2337 jobject ret = JNIHandles::make_local(id->holder()->java_mirror()->obj_field(id->offset()));
2338 HOTSPOT_JNI_GETSTATICOBJECTFIELD_RETURN(ret);
2339 return ret;
2340 JNI_END
2341
2342
2343 #define DEFINE_GETSTATICFIELD(Return,Fieldname,Result \
2344 , EntryProbe, ReturnProbe) \
2345 \
2346 DT_RETURN_MARK_DECL_FOR(Result, GetStatic##Result##Field, Return \
2347 , ReturnProbe); \
2348 \
2349 JNI_ENTRY(Return, jni_GetStatic##Result##Field(JNIEnv *env, jclass clazz, jfieldID fieldID)) \
2350 JNIWrapper("GetStatic" XSTR(Result) "Field"); \
2351 EntryProbe; \
2352 Return ret = 0;\
2353 DT_RETURN_MARK_FOR(Result, GetStatic##Result##Field, Return, \
2354 (const Return&)ret);\
2355 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID); \
2356 assert(id->is_static_field_id(), "invalid static field id"); \
2357 /* Keep JVMTI addition small and only check enabled flag here. */ \
2358 /* jni_GetField_probe() assumes that is okay to create handles. */ \
2359 if (JvmtiExport::should_post_field_access()) { \
2360 JvmtiExport::jni_GetField_probe(thread, NULL, NULL, id->holder(), fieldID, true); \
2361 } \
2362 ret = id->holder()->java_mirror()-> Fieldname##_field (id->offset()); \
2363 return ret;\
2364 JNI_END
2365
2366 DEFINE_GETSTATICFIELD(jboolean, bool, Boolean
2367 , HOTSPOT_JNI_GETSTATICBOOLEANFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICBOOLEANFIELD_RETURN(_ret_ref))
2368 DEFINE_GETSTATICFIELD(jbyte, byte, Byte
2369 , HOTSPOT_JNI_GETSTATICBYTEFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICBYTEFIELD_RETURN(_ret_ref) )
2370 DEFINE_GETSTATICFIELD(jchar, char, Char
2371 , HOTSPOT_JNI_GETSTATICCHARFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICCHARFIELD_RETURN(_ret_ref) )
2372 DEFINE_GETSTATICFIELD(jshort, short, Short
2373 , HOTSPOT_JNI_GETSTATICSHORTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICSHORTFIELD_RETURN(_ret_ref) )
2374 DEFINE_GETSTATICFIELD(jint, int, Int
2375 , HOTSPOT_JNI_GETSTATICINTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICINTFIELD_RETURN(_ret_ref) )
2376 DEFINE_GETSTATICFIELD(jlong, long, Long
2377 , HOTSPOT_JNI_GETSTATICLONGFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICLONGFIELD_RETURN(_ret_ref) )
2378 // Float and double probes don't return value because dtrace doesn't currently support it
2379 DEFINE_GETSTATICFIELD(jfloat, float, Float
2380 , HOTSPOT_JNI_GETSTATICFLOATFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICFLOATFIELD_RETURN() )
2381 DEFINE_GETSTATICFIELD(jdouble, double, Double
2382 , HOTSPOT_JNI_GETSTATICDOUBLEFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICDOUBLEFIELD_RETURN() )
2383
2384 JNI_ENTRY(void, jni_SetStaticObjectField(JNIEnv *env, jclass clazz, jfieldID fieldID, jobject value))
2385 JNIWrapper("SetStaticObjectField");
2386 HOTSPOT_JNI_SETSTATICOBJECTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value);
2387 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID);
2388 assert(id->is_static_field_id(), "invalid static field id");
2389 // Keep JVMTI addition small and only check enabled flag here.
2390 // jni_SetField_probe() assumes that is okay to create handles.
2391 if (JvmtiExport::should_post_field_modification()) {
2392 jvalue field_value;
2393 field_value.l = value;
2394 JvmtiExport::jni_SetField_probe(thread, NULL, NULL, id->holder(), fieldID, true, 'L', (jvalue *)&field_value);
2395 }
2396 id->holder()->java_mirror()->obj_field_put(id->offset(), JNIHandles::resolve(value));
2397 HOTSPOT_JNI_SETSTATICOBJECTFIELD_RETURN();
2398 JNI_END
2399
2400
2401
2402 #define DEFINE_SETSTATICFIELD(Argument,Fieldname,Result,SigType,unionType \
2403 , EntryProbe, ReturnProbe) \
2404 \
2405 JNI_ENTRY(void, jni_SetStatic##Result##Field(JNIEnv *env, jclass clazz, jfieldID fieldID, Argument value)) \
2406 JNIWrapper("SetStatic" XSTR(Result) "Field"); \
2407 EntryProbe; \
2408 \
2409 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID); \
2410 assert(id->is_static_field_id(), "invalid static field id"); \
2411 /* Keep JVMTI addition small and only check enabled flag here. */ \
2412 /* jni_SetField_probe() assumes that is okay to create handles. */ \
2413 if (JvmtiExport::should_post_field_modification()) { \
2414 jvalue field_value; \
2415 field_value.unionType = value; \
2416 JvmtiExport::jni_SetField_probe(thread, NULL, NULL, id->holder(), fieldID, true, SigType, (jvalue *)&field_value); \
2417 } \
2418 id->holder()->java_mirror()-> Fieldname##_field_put (id->offset(), value); \
2419 ReturnProbe;\
2420 JNI_END
2421
2422 DEFINE_SETSTATICFIELD(jboolean, bool, Boolean, 'Z', z
2423 , HOTSPOT_JNI_SETSTATICBOOLEANFIELD_ENTRY(env, clazz, (uintptr_t)fieldID, value),
2424 HOTSPOT_JNI_SETSTATICBOOLEANFIELD_RETURN())
2425 DEFINE_SETSTATICFIELD(jbyte, byte, Byte, 'B', b
2426 , HOTSPOT_JNI_SETSTATICBYTEFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value),
2427 HOTSPOT_JNI_SETSTATICBYTEFIELD_RETURN())
2428 DEFINE_SETSTATICFIELD(jchar, char, Char, 'C', c
2429 , HOTSPOT_JNI_SETSTATICCHARFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value),
2430 HOTSPOT_JNI_SETSTATICCHARFIELD_RETURN())
2431 DEFINE_SETSTATICFIELD(jshort, short, Short, 'S', s
2432 , HOTSPOT_JNI_SETSTATICSHORTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value),
2433 HOTSPOT_JNI_SETSTATICSHORTFIELD_RETURN())
2434 DEFINE_SETSTATICFIELD(jint, int, Int, 'I', i
2435 , HOTSPOT_JNI_SETSTATICINTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value),
2436 HOTSPOT_JNI_SETSTATICINTFIELD_RETURN())
2437 DEFINE_SETSTATICFIELD(jlong, long, Long, 'J', j
2438 , HOTSPOT_JNI_SETSTATICLONGFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value),
2439 HOTSPOT_JNI_SETSTATICLONGFIELD_RETURN())
2440 // Float and double probes don't return value because dtrace doesn't currently support it
2441 DEFINE_SETSTATICFIELD(jfloat, float, Float, 'F', f
2442 , HOTSPOT_JNI_SETSTATICFLOATFIELD_ENTRY(env, clazz, (uintptr_t) fieldID),
2443 HOTSPOT_JNI_SETSTATICFLOATFIELD_RETURN())
2444 DEFINE_SETSTATICFIELD(jdouble, double, Double, 'D', d
2445 , HOTSPOT_JNI_SETSTATICDOUBLEFIELD_ENTRY(env, clazz, (uintptr_t) fieldID),
2446 HOTSPOT_JNI_SETSTATICDOUBLEFIELD_RETURN())
2447
2448 //
2449 // String Operations
2450 //
2451
2452 // Unicode Interface
2453
2454 DT_RETURN_MARK_DECL(NewString, jstring
2455 , HOTSPOT_JNI_NEWSTRING_RETURN(_ret_ref));
2456
2457 JNI_ENTRY(jstring, jni_NewString(JNIEnv *env, const jchar *unicodeChars, jsize len))
2458 JNIWrapper("NewString");
2459 HOTSPOT_JNI_NEWSTRING_ENTRY(env, (uint16_t *) unicodeChars, len);
2460 jstring ret = NULL;
2461 DT_RETURN_MARK(NewString, jstring, (const jstring&)ret);
2462 oop string=java_lang_String::create_oop_from_unicode((jchar*) unicodeChars, len, CHECK_NULL);
2463 ret = (jstring) JNIHandles::make_local(env, string);
2464 return ret;
2465 JNI_END
2466
2467
2468 JNI_QUICK_ENTRY(jsize, jni_GetStringLength(JNIEnv *env, jstring string))
2469 JNIWrapper("GetStringLength");
2470 HOTSPOT_JNI_GETSTRINGLENGTH_ENTRY(env, string);
2471 jsize ret = 0;
2472 oop s = JNIHandles::resolve_non_null(string);
2473 if (java_lang_String::value(s) != NULL) {
2474 ret = java_lang_String::length(s);
2475 }
2476 HOTSPOT_JNI_GETSTRINGLENGTH_RETURN(ret);
2477 return ret;
2478 JNI_END
2479
2480
2481 JNI_QUICK_ENTRY(const jchar*, jni_GetStringChars(
2482 JNIEnv *env, jstring string, jboolean *isCopy))
2483 JNIWrapper("GetStringChars");
2484 HOTSPOT_JNI_GETSTRINGCHARS_ENTRY(env, string, (uintptr_t *) isCopy);
2485 jchar* buf = NULL;
2486 oop s = JNIHandles::resolve_non_null(string);
2487 typeArrayOop s_value = java_lang_String::value(s);
2488 if (s_value != NULL) {
2489 int s_len = java_lang_String::length(s);
2490 int s_offset = java_lang_String::offset(s);
2491 buf = NEW_C_HEAP_ARRAY_RETURN_NULL(jchar, s_len + 1, mtInternal); // add one for zero termination
2492 /* JNI Specification states return NULL on OOM */
2493 if (buf != NULL) {
2494 if (s_len > 0) {
2495 memcpy(buf, s_value->char_at_addr(s_offset), sizeof(jchar)*s_len);
2496 }
2497 buf[s_len] = 0;
2498 //%note jni_5
2499 if (isCopy != NULL) {
2500 *isCopy = JNI_TRUE;
2501 }
2502 }
2503 }
2504 HOTSPOT_JNI_GETSTRINGCHARS_RETURN(buf);
2505 return buf;
2506 JNI_END
2507
2508
2509 JNI_QUICK_ENTRY(void, jni_ReleaseStringChars(JNIEnv *env, jstring str, const jchar *chars))
2510 JNIWrapper("ReleaseStringChars");
2511 HOTSPOT_JNI_RELEASESTRINGCHARS_ENTRY(env, str, (uint16_t *) chars);
2512 //%note jni_6
2513 if (chars != NULL) {
2514 // Since String objects are supposed to be immutable, don't copy any
2515 // new data back. A bad user will have to go after the char array.
2516 FreeHeap((void*) chars);
2517 }
2518 HOTSPOT_JNI_RELEASESTRINGCHARS_RETURN();
2519 JNI_END
2520
2521
2522 // UTF Interface
2523
2524 DT_RETURN_MARK_DECL(NewStringUTF, jstring
2525 , HOTSPOT_JNI_NEWSTRINGUTF_RETURN(_ret_ref));
2526
2527 JNI_ENTRY(jstring, jni_NewStringUTF(JNIEnv *env, const char *bytes))
2528 JNIWrapper("NewStringUTF");
2529 HOTSPOT_JNI_NEWSTRINGUTF_ENTRY(env, (char *) bytes);
2530 jstring ret;
2531 DT_RETURN_MARK(NewStringUTF, jstring, (const jstring&)ret);
2532
2533 oop result = java_lang_String::create_oop_from_str((char*) bytes, CHECK_NULL);
2534 ret = (jstring) JNIHandles::make_local(env, result);
2535 return ret;
2536 JNI_END
2537
2538
2539 JNI_ENTRY(jsize, jni_GetStringUTFLength(JNIEnv *env, jstring string))
2540 JNIWrapper("GetStringUTFLength");
2541 HOTSPOT_JNI_GETSTRINGUTFLENGTH_ENTRY(env, string);
2542 jsize ret = 0;
2543 oop java_string = JNIHandles::resolve_non_null(string);
2544 if (java_lang_String::value(java_string) != NULL) {
2545 ret = java_lang_String::utf8_length(java_string);
2546 }
2547 HOTSPOT_JNI_GETSTRINGUTFLENGTH_RETURN(ret);
2548 return ret;
2549 JNI_END
2550
2551
2552 JNI_ENTRY(const char*, jni_GetStringUTFChars(JNIEnv *env, jstring string, jboolean *isCopy))
2553 JNIWrapper("GetStringUTFChars");
2554 HOTSPOT_JNI_GETSTRINGUTFCHARS_ENTRY(env, string, (uintptr_t *) isCopy);
2555 char* result = NULL;
2556 oop java_string = JNIHandles::resolve_non_null(string);
2557 if (java_lang_String::value(java_string) != NULL) {
2558 size_t length = java_lang_String::utf8_length(java_string);
2559 /* JNI Specification states return NULL on OOM */
2560 result = AllocateHeap(length + 1, mtInternal, 0, AllocFailStrategy::RETURN_NULL);
2561 if (result != NULL) {
2562 java_lang_String::as_utf8_string(java_string, result, (int) length + 1);
2563 if (isCopy != NULL) {
2564 *isCopy = JNI_TRUE;
2565 }
2566 }
2567 }
2568 HOTSPOT_JNI_GETSTRINGUTFCHARS_RETURN(result);
2569 return result;
2570 JNI_END
2571
2572
2573 JNI_LEAF(void, jni_ReleaseStringUTFChars(JNIEnv *env, jstring str, const char *chars))
2574 JNIWrapper("ReleaseStringUTFChars");
2575 HOTSPOT_JNI_RELEASESTRINGUTFCHARS_ENTRY(env, str, (char *) chars);
2576 if (chars != NULL) {
2577 FreeHeap((char*) chars);
2578 }
2579 HOTSPOT_JNI_RELEASESTRINGUTFCHARS_RETURN();
2580 JNI_END
2581
2582
2583 JNI_QUICK_ENTRY(jsize, jni_GetArrayLength(JNIEnv *env, jarray array))
2584 JNIWrapper("GetArrayLength");
2585 HOTSPOT_JNI_GETARRAYLENGTH_ENTRY(env, array);
2586 arrayOop a = arrayOop(JNIHandles::resolve_non_null(array));
2587 assert(a->is_array(), "must be array");
2588 jsize ret = a->length();
2589 HOTSPOT_JNI_GETARRAYLENGTH_RETURN(ret);
2590 return ret;
2591 JNI_END
2592
2593
2594 //
2595 // Object Array Operations
2596 //
2597
2598 DT_RETURN_MARK_DECL(NewObjectArray, jobjectArray
2599 , HOTSPOT_JNI_NEWOBJECTARRAY_RETURN(_ret_ref));
2600
2601 JNI_ENTRY(jobjectArray, jni_NewObjectArray(JNIEnv *env, jsize length, jclass elementClass, jobject initialElement))
2602 JNIWrapper("NewObjectArray");
2603 HOTSPOT_JNI_NEWOBJECTARRAY_ENTRY(env, length, elementClass, initialElement);
2604 jobjectArray ret = NULL;
2605 DT_RETURN_MARK(NewObjectArray, jobjectArray, (const jobjectArray&)ret);
2606 KlassHandle ek(THREAD, java_lang_Class::as_Klass(JNIHandles::resolve_non_null(elementClass)));
2607 Klass* ako = ek()->array_klass(CHECK_NULL);
2608 KlassHandle ak = KlassHandle(THREAD, ako);
2609 ObjArrayKlass::cast(ak())->initialize(CHECK_NULL);
2610 objArrayOop result = ObjArrayKlass::cast(ak())->allocate(length, CHECK_NULL);
2611 oop initial_value = JNIHandles::resolve(initialElement);
2612 if (initial_value != NULL) { // array already initialized with NULL
2613 for (int index = 0; index < length; index++) {
2614 result->obj_at_put(index, initial_value);
2615 }
2616 }
2617 ret = (jobjectArray) JNIHandles::make_local(env, result);
2618 return ret;
2619 JNI_END
2620
2621 DT_RETURN_MARK_DECL(GetObjectArrayElement, jobject
2622 , HOTSPOT_JNI_GETOBJECTARRAYELEMENT_RETURN(_ret_ref));
2623
2624 JNI_ENTRY(jobject, jni_GetObjectArrayElement(JNIEnv *env, jobjectArray array, jsize index))
2625 JNIWrapper("GetObjectArrayElement");
2626 HOTSPOT_JNI_GETOBJECTARRAYELEMENT_ENTRY(env, array, index);
2627 jobject ret = NULL;
2628 DT_RETURN_MARK(GetObjectArrayElement, jobject, (const jobject&)ret);
2629 objArrayOop a = objArrayOop(JNIHandles::resolve_non_null(array));
2630 if (a->is_within_bounds(index)) {
2631 ret = JNIHandles::make_local(env, a->obj_at(index));
2632 return ret;
2633 } else {
2634 char buf[jintAsStringSize];
2635 sprintf(buf, "%d", index);
2636 THROW_MSG_0(vmSymbols::java_lang_ArrayIndexOutOfBoundsException(), buf);
2637 }
2638 JNI_END
2639
2640 DT_VOID_RETURN_MARK_DECL(SetObjectArrayElement
2641 , HOTSPOT_JNI_SETOBJECTARRAYELEMENT_RETURN());
2642
2643 JNI_ENTRY(void, jni_SetObjectArrayElement(JNIEnv *env, jobjectArray array, jsize index, jobject value))
2644 JNIWrapper("SetObjectArrayElement");
2645 HOTSPOT_JNI_SETOBJECTARRAYELEMENT_ENTRY(env, array, index, value);
2646 DT_VOID_RETURN_MARK(SetObjectArrayElement);
2647
2648 objArrayOop a = objArrayOop(JNIHandles::resolve_non_null(array));
2649 oop v = JNIHandles::resolve(value);
2650 if (a->is_within_bounds(index)) {
2651 if (v == NULL || v->is_a(ObjArrayKlass::cast(a->klass())->element_klass())) {
2652 a->obj_at_put(index, v);
2653 } else {
2654 THROW(vmSymbols::java_lang_ArrayStoreException());
2655 }
2656 } else {
2657 char buf[jintAsStringSize];
2658 sprintf(buf, "%d", index);
2659 THROW_MSG(vmSymbols::java_lang_ArrayIndexOutOfBoundsException(), buf);
2660 }
2661 JNI_END
2662
2663
2664
2665 #define DEFINE_NEWSCALARARRAY(Return,Allocator,Result \
2666 ,EntryProbe,ReturnProbe) \
2667 \
2668 DT_RETURN_MARK_DECL(New##Result##Array, Return \
2669 , ReturnProbe); \
2670 \
2671 JNI_ENTRY(Return, \
2672 jni_New##Result##Array(JNIEnv *env, jsize len)) \
2673 JNIWrapper("New" XSTR(Result) "Array"); \
2674 EntryProbe; \
2675 Return ret = NULL;\
2676 DT_RETURN_MARK(New##Result##Array, Return, (const Return&)ret);\
2677 \
2678 oop obj= oopFactory::Allocator(len, CHECK_0); \
2679 ret = (Return) JNIHandles::make_local(env, obj); \
2680 return ret;\
2681 JNI_END
2682
2683 DEFINE_NEWSCALARARRAY(jbooleanArray, new_boolArray, Boolean,
2684 HOTSPOT_JNI_NEWBOOLEANARRAY_ENTRY(env, len),
2685 HOTSPOT_JNI_NEWBOOLEANARRAY_RETURN(_ret_ref))
2686 DEFINE_NEWSCALARARRAY(jbyteArray, new_byteArray, Byte,
2687 HOTSPOT_JNI_NEWBYTEARRAY_ENTRY(env, len),
2688 HOTSPOT_JNI_NEWBYTEARRAY_RETURN(_ret_ref))
2689 DEFINE_NEWSCALARARRAY(jshortArray, new_shortArray, Short,
2690 HOTSPOT_JNI_NEWSHORTARRAY_ENTRY(env, len),
2691 HOTSPOT_JNI_NEWSHORTARRAY_RETURN(_ret_ref))
2692 DEFINE_NEWSCALARARRAY(jcharArray, new_charArray, Char,
2693 HOTSPOT_JNI_NEWCHARARRAY_ENTRY(env, len),
2694 HOTSPOT_JNI_NEWCHARARRAY_RETURN(_ret_ref))
2695 DEFINE_NEWSCALARARRAY(jintArray, new_intArray, Int,
2696 HOTSPOT_JNI_NEWINTARRAY_ENTRY(env, len),
2697 HOTSPOT_JNI_NEWINTARRAY_RETURN(_ret_ref))
2698 DEFINE_NEWSCALARARRAY(jlongArray, new_longArray, Long,
2699 HOTSPOT_JNI_NEWLONGARRAY_ENTRY(env, len),
2700 HOTSPOT_JNI_NEWLONGARRAY_RETURN(_ret_ref))
2701 DEFINE_NEWSCALARARRAY(jfloatArray, new_singleArray, Float,
2702 HOTSPOT_JNI_NEWFLOATARRAY_ENTRY(env, len),
2703 HOTSPOT_JNI_NEWFLOATARRAY_RETURN(_ret_ref))
2704 DEFINE_NEWSCALARARRAY(jdoubleArray, new_doubleArray, Double,
2705 HOTSPOT_JNI_NEWDOUBLEARRAY_ENTRY(env, len),
2706 HOTSPOT_JNI_NEWDOUBLEARRAY_RETURN(_ret_ref))
2707
2708 // Return an address which will fault if the caller writes to it.
2709
2710 static char* get_bad_address() {
2711 static char* bad_address = NULL;
2712 if (bad_address == NULL) {
2713 size_t size = os::vm_allocation_granularity();
2714 bad_address = os::reserve_memory(size);
2715 if (bad_address != NULL) {
2716 os::protect_memory(bad_address, size, os::MEM_PROT_READ,
2717 /*is_committed*/false);
2718 }
2719 }
2720 return bad_address;
2721 }
2722
2723
2724
2725 #define DEFINE_GETSCALARARRAYELEMENTS(ElementTag,ElementType,Result, Tag \
2726 , EntryProbe, ReturnProbe) \
2727 \
2728 JNI_QUICK_ENTRY(ElementType*, \
2729 jni_Get##Result##ArrayElements(JNIEnv *env, ElementType##Array array, jboolean *isCopy)) \
2730 JNIWrapper("Get" XSTR(Result) "ArrayElements"); \
2731 EntryProbe; \
2732 /* allocate an chunk of memory in c land */ \
2733 typeArrayOop a = typeArrayOop(JNIHandles::resolve_non_null(array)); \
2734 ElementType* result; \
2735 int len = a->length(); \
2736 if (len == 0) { \
2737 /* Empty array: legal but useless, can't return NULL. \
2738 * Return a pointer to something useless. \
2739 * Avoid asserts in typeArrayOop. */ \
2740 result = (ElementType*)get_bad_address(); \
2741 } else { \
2742 /* JNI Specification states return NULL on OOM */ \
2743 result = NEW_C_HEAP_ARRAY_RETURN_NULL(ElementType, len, mtInternal); \
2744 if (result != NULL) { \
2745 /* copy the array to the c chunk */ \
2746 memcpy(result, a->Tag##_at_addr(0), sizeof(ElementType)*len); \
2747 if (isCopy) { \
2748 *isCopy = JNI_TRUE; \
2749 } \
2750 } \
2751 } \
2752 ReturnProbe; \
2753 return result; \
2754 JNI_END
2755
2756 DEFINE_GETSCALARARRAYELEMENTS(T_BOOLEAN, jboolean, Boolean, bool
2757 , HOTSPOT_JNI_GETBOOLEANARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy),
2758 HOTSPOT_JNI_GETBOOLEANARRAYELEMENTS_RETURN((uintptr_t*)result))
2759 DEFINE_GETSCALARARRAYELEMENTS(T_BYTE, jbyte, Byte, byte
2760 , HOTSPOT_JNI_GETBYTEARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy),
2761 HOTSPOT_JNI_GETBYTEARRAYELEMENTS_RETURN((char*)result))
2762 DEFINE_GETSCALARARRAYELEMENTS(T_SHORT, jshort, Short, short
2763 , HOTSPOT_JNI_GETSHORTARRAYELEMENTS_ENTRY(env, (uint16_t*) array, (uintptr_t *) isCopy),
2764 HOTSPOT_JNI_GETSHORTARRAYELEMENTS_RETURN((uint16_t*)result))
2765 DEFINE_GETSCALARARRAYELEMENTS(T_CHAR, jchar, Char, char
2766 , HOTSPOT_JNI_GETCHARARRAYELEMENTS_ENTRY(env, (uint16_t*) array, (uintptr_t *) isCopy),
2767 HOTSPOT_JNI_GETCHARARRAYELEMENTS_RETURN(result))
2768 DEFINE_GETSCALARARRAYELEMENTS(T_INT, jint, Int, int
2769 , HOTSPOT_JNI_GETINTARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy),
2770 HOTSPOT_JNI_GETINTARRAYELEMENTS_RETURN((uint32_t*)result))
2771 DEFINE_GETSCALARARRAYELEMENTS(T_LONG, jlong, Long, long
2772 , HOTSPOT_JNI_GETLONGARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy),
2773 HOTSPOT_JNI_GETLONGARRAYELEMENTS_RETURN(((uintptr_t*)result)))
2774 // Float and double probes don't return value because dtrace doesn't currently support it
2775 DEFINE_GETSCALARARRAYELEMENTS(T_FLOAT, jfloat, Float, float
2776 , HOTSPOT_JNI_GETFLOATARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy),
2777 HOTSPOT_JNI_GETFLOATARRAYELEMENTS_RETURN(result))
2778 DEFINE_GETSCALARARRAYELEMENTS(T_DOUBLE, jdouble, Double, double
2779 , HOTSPOT_JNI_GETDOUBLEARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy),
2780 HOTSPOT_JNI_GETDOUBLEARRAYELEMENTS_RETURN(result))
2781
2782
2783 #define DEFINE_RELEASESCALARARRAYELEMENTS(ElementTag,ElementType,Result,Tag \
2784 , EntryProbe, ReturnProbe);\
2785 \
2786 JNI_QUICK_ENTRY(void, \
2787 jni_Release##Result##ArrayElements(JNIEnv *env, ElementType##Array array, \
2788 ElementType *buf, jint mode)) \
2789 JNIWrapper("Release" XSTR(Result) "ArrayElements"); \
2790 EntryProbe; \
2791 typeArrayOop a = typeArrayOop(JNIHandles::resolve_non_null(array)); \
2792 int len = a->length(); \
2793 if (len != 0) { /* Empty array: nothing to free or copy. */ \
2794 if ((mode == 0) || (mode == JNI_COMMIT)) { \
2795 memcpy(a->Tag##_at_addr(0), buf, sizeof(ElementType)*len); \
2796 } \
2797 if ((mode == 0) || (mode == JNI_ABORT)) { \
2798 FreeHeap(buf); \
2799 } \
2800 } \
2801 ReturnProbe; \
2802 JNI_END
2803
2804 DEFINE_RELEASESCALARARRAYELEMENTS(T_BOOLEAN, jboolean, Boolean, bool
2805 , HOTSPOT_JNI_RELEASEBOOLEANARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) buf, mode),
2806 HOTSPOT_JNI_RELEASEBOOLEANARRAYELEMENTS_RETURN())
2807 DEFINE_RELEASESCALARARRAYELEMENTS(T_BYTE, jbyte, Byte, byte
2808 , HOTSPOT_JNI_RELEASEBYTEARRAYELEMENTS_ENTRY(env, array, (char *) buf, mode),
2809 HOTSPOT_JNI_RELEASEBYTEARRAYELEMENTS_RETURN())
2810 DEFINE_RELEASESCALARARRAYELEMENTS(T_SHORT, jshort, Short, short
2811 , HOTSPOT_JNI_RELEASESHORTARRAYELEMENTS_ENTRY(env, array, (uint16_t *) buf, mode),
2812 HOTSPOT_JNI_RELEASESHORTARRAYELEMENTS_RETURN())
2813 DEFINE_RELEASESCALARARRAYELEMENTS(T_CHAR, jchar, Char, char
2814 , HOTSPOT_JNI_RELEASECHARARRAYELEMENTS_ENTRY(env, array, (uint16_t *) buf, mode),
2815 HOTSPOT_JNI_RELEASECHARARRAYELEMENTS_RETURN())
2816 DEFINE_RELEASESCALARARRAYELEMENTS(T_INT, jint, Int, int
2817 , HOTSPOT_JNI_RELEASEINTARRAYELEMENTS_ENTRY(env, array, (uint32_t *) buf, mode),
2818 HOTSPOT_JNI_RELEASEINTARRAYELEMENTS_RETURN())
2819 DEFINE_RELEASESCALARARRAYELEMENTS(T_LONG, jlong, Long, long
2820 , HOTSPOT_JNI_RELEASELONGARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) buf, mode),
2821 HOTSPOT_JNI_RELEASELONGARRAYELEMENTS_RETURN())
2822 DEFINE_RELEASESCALARARRAYELEMENTS(T_FLOAT, jfloat, Float, float
2823 , HOTSPOT_JNI_RELEASEFLOATARRAYELEMENTS_ENTRY(env, array, (float *) buf, mode),
2824 HOTSPOT_JNI_RELEASEFLOATARRAYELEMENTS_RETURN())
2825 DEFINE_RELEASESCALARARRAYELEMENTS(T_DOUBLE, jdouble, Double, double
2826 , HOTSPOT_JNI_RELEASEDOUBLEARRAYELEMENTS_ENTRY(env, array, (double *) buf, mode),
2827 HOTSPOT_JNI_RELEASEDOUBLEARRAYELEMENTS_RETURN())
2828
2829
2830 #define DEFINE_GETSCALARARRAYREGION(ElementTag,ElementType,Result, Tag \
2831 , EntryProbe, ReturnProbe); \
2832 DT_VOID_RETURN_MARK_DECL(Get##Result##ArrayRegion \
2833 , ReturnProbe); \
2834 \
2835 JNI_ENTRY(void, \
2836 jni_Get##Result##ArrayRegion(JNIEnv *env, ElementType##Array array, jsize start, \
2837 jsize len, ElementType *buf)) \
2838 JNIWrapper("Get" XSTR(Result) "ArrayRegion"); \
2839 EntryProbe; \
2840 DT_VOID_RETURN_MARK(Get##Result##ArrayRegion); \
2841 typeArrayOop src = typeArrayOop(JNIHandles::resolve_non_null(array)); \
2842 if (start < 0 || len < 0 || ((unsigned int)start + (unsigned int)len > (unsigned int)src->length())) { \
2843 THROW(vmSymbols::java_lang_ArrayIndexOutOfBoundsException()); \
2844 } else { \
2845 if (len > 0) { \
2846 int sc = TypeArrayKlass::cast(src->klass())->log2_element_size(); \
2847 memcpy((u_char*) buf, \
2848 (u_char*) src->Tag##_at_addr(start), \
2849 len << sc); \
2850 } \
2851 } \
2852 JNI_END
2853
2854 DEFINE_GETSCALARARRAYREGION(T_BOOLEAN, jboolean,Boolean, bool
2855 , HOTSPOT_JNI_GETBOOLEANARRAYREGION_ENTRY(env, array, start, len, (uintptr_t *) buf),
2856 HOTSPOT_JNI_GETBOOLEANARRAYREGION_RETURN());
2857 DEFINE_GETSCALARARRAYREGION(T_BYTE, jbyte, Byte, byte
2858 , HOTSPOT_JNI_GETBYTEARRAYREGION_ENTRY(env, array, start, len, (char *) buf),
2859 HOTSPOT_JNI_GETBYTEARRAYREGION_RETURN());
2860 DEFINE_GETSCALARARRAYREGION(T_SHORT, jshort, Short, short
2861 , HOTSPOT_JNI_GETSHORTARRAYREGION_ENTRY(env, array, start, len, (uint16_t *) buf),
2862 HOTSPOT_JNI_GETSHORTARRAYREGION_RETURN());
2863 DEFINE_GETSCALARARRAYREGION(T_CHAR, jchar, Char, char
2864 , HOTSPOT_JNI_GETCHARARRAYREGION_ENTRY(env, array, start, len, (uint16_t*) buf),
2865 HOTSPOT_JNI_GETCHARARRAYREGION_RETURN());
2866 DEFINE_GETSCALARARRAYREGION(T_INT, jint, Int, int
2867 , HOTSPOT_JNI_GETINTARRAYREGION_ENTRY(env, array, start, len, (uint32_t*) buf),
2868 HOTSPOT_JNI_GETINTARRAYREGION_RETURN());
2869 DEFINE_GETSCALARARRAYREGION(T_LONG, jlong, Long, long
2870 , HOTSPOT_JNI_GETLONGARRAYREGION_ENTRY(env, array, start, len, (uintptr_t *) buf),
2871 HOTSPOT_JNI_GETLONGARRAYREGION_RETURN());
2872 DEFINE_GETSCALARARRAYREGION(T_FLOAT, jfloat, Float, float
2873 , HOTSPOT_JNI_GETFLOATARRAYREGION_ENTRY(env, array, start, len, (float *) buf),
2874 HOTSPOT_JNI_GETFLOATARRAYREGION_RETURN());
2875 DEFINE_GETSCALARARRAYREGION(T_DOUBLE, jdouble, Double, double
2876 , HOTSPOT_JNI_GETDOUBLEARRAYREGION_ENTRY(env, array, start, len, (double *) buf),
2877 HOTSPOT_JNI_GETDOUBLEARRAYREGION_RETURN());
2878
2879
2880 #define DEFINE_SETSCALARARRAYREGION(ElementTag,ElementType,Result, Tag \
2881 , EntryProbe, ReturnProbe); \
2882 DT_VOID_RETURN_MARK_DECL(Set##Result##ArrayRegion \
2883 ,ReturnProbe); \
2884 \
2885 JNI_ENTRY(void, \
2886 jni_Set##Result##ArrayRegion(JNIEnv *env, ElementType##Array array, jsize start, \
2887 jsize len, const ElementType *buf)) \
2888 JNIWrapper("Set" XSTR(Result) "ArrayRegion"); \
2889 EntryProbe; \
2890 DT_VOID_RETURN_MARK(Set##Result##ArrayRegion); \
2891 typeArrayOop dst = typeArrayOop(JNIHandles::resolve_non_null(array)); \
2892 if (start < 0 || len < 0 || ((unsigned int)start + (unsigned int)len > (unsigned int)dst->length())) { \
2893 THROW(vmSymbols::java_lang_ArrayIndexOutOfBoundsException()); \
2894 } else { \
2895 if (len > 0) { \
2896 int sc = TypeArrayKlass::cast(dst->klass())->log2_element_size(); \
2897 memcpy((u_char*) dst->Tag##_at_addr(start), \
2898 (u_char*) buf, \
2899 len << sc); \
2900 } \
2901 } \
2902 JNI_END
2903
2904 DEFINE_SETSCALARARRAYREGION(T_BOOLEAN, jboolean, Boolean, bool
2905 , HOTSPOT_JNI_SETBOOLEANARRAYREGION_ENTRY(env, array, start, len, (uintptr_t *)buf),
2906 HOTSPOT_JNI_SETBOOLEANARRAYREGION_RETURN())
2907 DEFINE_SETSCALARARRAYREGION(T_BYTE, jbyte, Byte, byte
2908 , HOTSPOT_JNI_SETBYTEARRAYREGION_ENTRY(env, array, start, len, (char *) buf),
2909 HOTSPOT_JNI_SETBYTEARRAYREGION_RETURN())
2910 DEFINE_SETSCALARARRAYREGION(T_SHORT, jshort, Short, short
2911 , HOTSPOT_JNI_SETSHORTARRAYREGION_ENTRY(env, array, start, len, (uint16_t *) buf),
2912 HOTSPOT_JNI_SETSHORTARRAYREGION_RETURN())
2913 DEFINE_SETSCALARARRAYREGION(T_CHAR, jchar, Char, char
2914 , HOTSPOT_JNI_SETCHARARRAYREGION_ENTRY(env, array, start, len, (uint16_t *) buf),
2915 HOTSPOT_JNI_SETCHARARRAYREGION_RETURN())
2916 DEFINE_SETSCALARARRAYREGION(T_INT, jint, Int, int
2917 , HOTSPOT_JNI_SETINTARRAYREGION_ENTRY(env, array, start, len, (uint32_t *) buf),
2918 HOTSPOT_JNI_SETINTARRAYREGION_RETURN())
2919 DEFINE_SETSCALARARRAYREGION(T_LONG, jlong, Long, long
2920 , HOTSPOT_JNI_SETLONGARRAYREGION_ENTRY(env, array, start, len, (uintptr_t *) buf),
2921 HOTSPOT_JNI_SETLONGARRAYREGION_RETURN())
2922 DEFINE_SETSCALARARRAYREGION(T_FLOAT, jfloat, Float, float
2923 , HOTSPOT_JNI_SETFLOATARRAYREGION_ENTRY(env, array, start, len, (float *) buf),
2924 HOTSPOT_JNI_SETFLOATARRAYREGION_RETURN())
2925 DEFINE_SETSCALARARRAYREGION(T_DOUBLE, jdouble, Double, double
2926 , HOTSPOT_JNI_SETDOUBLEARRAYREGION_ENTRY(env, array, start, len, (double *) buf),
2927 HOTSPOT_JNI_SETDOUBLEARRAYREGION_RETURN())
2928
2929
2930 //
2931 // Interception of natives
2932 //
2933
2934 // The RegisterNatives call being attempted tried to register with a method that
2935 // is not native. Ask JVM TI what prefixes have been specified. Then check
2936 // to see if the native method is now wrapped with the prefixes. See the
2937 // SetNativeMethodPrefix(es) functions in the JVM TI Spec for details.
2938 static Method* find_prefixed_native(KlassHandle k,
2939 Symbol* name, Symbol* signature, TRAPS) {
2940 #if INCLUDE_JVMTI
2941 ResourceMark rm(THREAD);
2942 Method* method;
2943 int name_len = name->utf8_length();
2944 char* name_str = name->as_utf8();
2945 int prefix_count;
2946 char** prefixes = JvmtiExport::get_all_native_method_prefixes(&prefix_count);
2947 for (int i = 0; i < prefix_count; i++) {
2948 char* prefix = prefixes[i];
2949 int prefix_len = (int)strlen(prefix);
2950
2951 // try adding this prefix to the method name and see if it matches another method name
2952 int trial_len = name_len + prefix_len;
2953 char* trial_name_str = NEW_RESOURCE_ARRAY(char, trial_len + 1);
2954 strcpy(trial_name_str, prefix);
2955 strcat(trial_name_str, name_str);
2956 TempNewSymbol trial_name = SymbolTable::probe(trial_name_str, trial_len);
2957 if (trial_name == NULL) {
2958 continue; // no such symbol, so this prefix wasn't used, try the next prefix
2959 }
2960 method = k()->lookup_method(trial_name, signature);
2961 if (method == NULL) {
2962 continue; // signature doesn't match, try the next prefix
2963 }
2964 if (method->is_native()) {
2965 method->set_is_prefixed_native();
2966 return method; // wahoo, we found a prefixed version of the method, return it
2967 }
2968 // found as non-native, so prefix is good, add it, probably just need more prefixes
2969 name_len = trial_len;
2970 name_str = trial_name_str;
2971 }
2972 #endif // INCLUDE_JVMTI
2973 return NULL; // not found
2974 }
2975
2976 static bool register_native(KlassHandle k, Symbol* name, Symbol* signature, address entry, TRAPS) {
2977 Method* method = k()->lookup_method(name, signature);
2978 if (method == NULL) {
2979 ResourceMark rm;
2980 stringStream st;
2981 st.print("Method %s name or signature does not match",
2982 Method::name_and_sig_as_C_string(k(), name, signature));
2983 THROW_MSG_(vmSymbols::java_lang_NoSuchMethodError(), st.as_string(), false);
2984 }
2985 if (!method->is_native()) {
2986 // trying to register to a non-native method, see if a JVM TI agent has added prefix(es)
2987 method = find_prefixed_native(k, name, signature, THREAD);
2988 if (method == NULL) {
2989 ResourceMark rm;
2990 stringStream st;
2991 st.print("Method %s is not declared as native",
2992 Method::name_and_sig_as_C_string(k(), name, signature));
2993 THROW_MSG_(vmSymbols::java_lang_NoSuchMethodError(), st.as_string(), false);
2994 }
2995 }
2996
2997 if (entry != NULL) {
2998 method->set_native_function(entry,
2999 Method::native_bind_event_is_interesting);
3000 } else {
3001 method->clear_native_function();
3002 }
3003 if (PrintJNIResolving) {
3004 ResourceMark rm(THREAD);
3005 tty->print_cr("[Registering JNI native method %s.%s]",
3006 method->method_holder()->external_name(),
3007 method->name()->as_C_string());
3008 }
3009 return true;
3010 }
3011
3012 DT_RETURN_MARK_DECL(RegisterNatives, jint
3013 , HOTSPOT_JNI_REGISTERNATIVES_RETURN(_ret_ref));
3014
3015 JNI_ENTRY(jint, jni_RegisterNatives(JNIEnv *env, jclass clazz,
3016 const JNINativeMethod *methods,
3017 jint nMethods))
3018 JNIWrapper("RegisterNatives");
3019 HOTSPOT_JNI_REGISTERNATIVES_ENTRY(env, clazz, (void *) methods, nMethods);
3020 jint ret = 0;
3021 DT_RETURN_MARK(RegisterNatives, jint, (const jint&)ret);
3022
3023 KlassHandle h_k(thread, java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz)));
3024
3025 for (int index = 0; index < nMethods; index++) {
3026 const char* meth_name = methods[index].name;
3027 const char* meth_sig = methods[index].signature;
3028 int meth_name_len = (int)strlen(meth_name);
3029
3030 // The class should have been loaded (we have an instance of the class
3031 // passed in) so the method and signature should already be in the symbol
3032 // table. If they're not there, the method doesn't exist.
3033 TempNewSymbol name = SymbolTable::probe(meth_name, meth_name_len);
3034 TempNewSymbol signature = SymbolTable::probe(meth_sig, (int)strlen(meth_sig));
3035
3036 if (name == NULL || signature == NULL) {
3037 ResourceMark rm;
3038 stringStream st;
3039 st.print("Method %s.%s%s not found", h_k()->external_name(), meth_name, meth_sig);
3040 // Must return negative value on failure
3041 THROW_MSG_(vmSymbols::java_lang_NoSuchMethodError(), st.as_string(), -1);
3042 }
3043
3044 bool res = register_native(h_k, name, signature,
3045 (address) methods[index].fnPtr, THREAD);
3046 if (!res) {
3047 ret = -1;
3048 break;
3049 }
3050 }
3051 return ret;
3052 JNI_END
3053
3054
3055 JNI_ENTRY(jint, jni_UnregisterNatives(JNIEnv *env, jclass clazz))
3056 JNIWrapper("UnregisterNatives");
3057 HOTSPOT_JNI_UNREGISTERNATIVES_ENTRY(env, clazz);
3058 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz));
3059 //%note jni_2
3060 if (k->oop_is_instance()) {
3061 for (int index = 0; index < InstanceKlass::cast(k)->methods()->length(); index++) {
3062 Method* m = InstanceKlass::cast(k)->methods()->at(index);
3063 if (m->is_native()) {
3064 m->clear_native_function();
3065 m->set_signature_handler(NULL);
3066 }
3067 }
3068 }
3069 HOTSPOT_JNI_UNREGISTERNATIVES_RETURN(0);
3070 return 0;
3071 JNI_END
3072
3073 //
3074 // Monitor functions
3075 //
3076
3077 DT_RETURN_MARK_DECL(MonitorEnter, jint
3078 , HOTSPOT_JNI_MONITORENTER_RETURN(_ret_ref));
3079
3080 JNI_ENTRY(jint, jni_MonitorEnter(JNIEnv *env, jobject jobj))
3081 HOTSPOT_JNI_MONITORENTER_ENTRY(env, jobj);
3082 jint ret = JNI_ERR;
3083 DT_RETURN_MARK(MonitorEnter, jint, (const jint&)ret);
3084
3085 // If the object is null, we can't do anything with it
3086 if (jobj == NULL) {
3087 THROW_(vmSymbols::java_lang_NullPointerException(), JNI_ERR);
3088 }
3089
3090 Handle obj(thread, JNIHandles::resolve_non_null(jobj));
3091 ObjectSynchronizer::jni_enter(obj, CHECK_(JNI_ERR));
3092 ret = JNI_OK;
3093 return ret;
3094 JNI_END
3095
3096 DT_RETURN_MARK_DECL(MonitorExit, jint
3097 , HOTSPOT_JNI_MONITOREXIT_RETURN(_ret_ref));
3098
3099 JNI_ENTRY(jint, jni_MonitorExit(JNIEnv *env, jobject jobj))
3100 HOTSPOT_JNI_MONITOREXIT_ENTRY(env, jobj);
3101 jint ret = JNI_ERR;
3102 DT_RETURN_MARK(MonitorExit, jint, (const jint&)ret);
3103
3104 // Don't do anything with a null object
3105 if (jobj == NULL) {
3106 THROW_(vmSymbols::java_lang_NullPointerException(), JNI_ERR);
3107 }
3108
3109 Handle obj(THREAD, JNIHandles::resolve_non_null(jobj));
3110 ObjectSynchronizer::jni_exit(obj(), CHECK_(JNI_ERR));
3111
3112 ret = JNI_OK;
3113 return ret;
3114 JNI_END
3115
3116 //
3117 // Extensions
3118 //
3119
3120 DT_VOID_RETURN_MARK_DECL(GetStringRegion
3121 , HOTSPOT_JNI_GETSTRINGREGION_RETURN());
3122
3123 JNI_ENTRY(void, jni_GetStringRegion(JNIEnv *env, jstring string, jsize start, jsize len, jchar *buf))
3124 JNIWrapper("GetStringRegion");
3125 HOTSPOT_JNI_GETSTRINGREGION_ENTRY(env, string, start, len, buf);
3126 DT_VOID_RETURN_MARK(GetStringRegion);
3127 oop s = JNIHandles::resolve_non_null(string);
3128 int s_len = java_lang_String::length(s);
3129 if (start < 0 || len < 0 || start + len > s_len) {
3130 THROW(vmSymbols::java_lang_StringIndexOutOfBoundsException());
3131 } else {
3132 if (len > 0) {
3133 int s_offset = java_lang_String::offset(s);
3134 typeArrayOop s_value = java_lang_String::value(s);
3135 memcpy(buf, s_value->char_at_addr(s_offset+start), sizeof(jchar)*len);
3136 }
3137 }
3138 JNI_END
3139
3140 DT_VOID_RETURN_MARK_DECL(GetStringUTFRegion
3141 , HOTSPOT_JNI_GETSTRINGUTFREGION_RETURN());
3142
3143 JNI_ENTRY(void, jni_GetStringUTFRegion(JNIEnv *env, jstring string, jsize start, jsize len, char *buf))
3144 JNIWrapper("GetStringUTFRegion");
3145 HOTSPOT_JNI_GETSTRINGUTFREGION_ENTRY(env, string, start, len, buf);
3146 DT_VOID_RETURN_MARK(GetStringUTFRegion);
3147 oop s = JNIHandles::resolve_non_null(string);
3148 int s_len = java_lang_String::length(s);
3149 if (start < 0 || len < 0 || start + len > s_len) {
3150 THROW(vmSymbols::java_lang_StringIndexOutOfBoundsException());
3151 } else {
3152 //%note jni_7
3153 if (len > 0) {
3154 // Assume the buffer is large enough as the JNI spec. does not require user error checking
3155 java_lang_String::as_utf8_string(s, start, len, buf, INT_MAX);
3156 // as_utf8_string null-terminates the result string
3157 } else {
3158 // JDK null-terminates the buffer even in len is zero
3159 if (buf != NULL) {
3160 buf[0] = 0;
3161 }
3162 }
3163 }
3164 JNI_END
3165
3166
3167 JNI_ENTRY(void*, jni_GetPrimitiveArrayCritical(JNIEnv *env, jarray array, jboolean *isCopy))
3168 JNIWrapper("GetPrimitiveArrayCritical");
3169 HOTSPOT_JNI_GETPRIMITIVEARRAYCRITICAL_ENTRY(env, array, (uintptr_t *) isCopy);
3170 GC_locker::lock_critical(thread);
3171 if (isCopy != NULL) {
3172 *isCopy = JNI_FALSE;
3173 }
3174 oop a = JNIHandles::resolve_non_null(array);
3175 assert(a->is_array(), "just checking");
3176 BasicType type;
3177 if (a->is_objArray()) {
3178 type = T_OBJECT;
3179 } else {
3180 type = TypeArrayKlass::cast(a->klass())->element_type();
3181 }
3182 void* ret = arrayOop(a)->base(type);
3183 HOTSPOT_JNI_GETPRIMITIVEARRAYCRITICAL_RETURN(ret);
3184 return ret;
3185 JNI_END
3186
3187
3188 JNI_ENTRY(void, jni_ReleasePrimitiveArrayCritical(JNIEnv *env, jarray array, void *carray, jint mode))
3189 JNIWrapper("ReleasePrimitiveArrayCritical");
3190 HOTSPOT_JNI_RELEASEPRIMITIVEARRAYCRITICAL_ENTRY(env, array, carray, mode);
3191 // The array, carray and mode arguments are ignored
3192 GC_locker::unlock_critical(thread);
3193 HOTSPOT_JNI_RELEASEPRIMITIVEARRAYCRITICAL_RETURN();
3194 JNI_END
3195
3196
3197 JNI_ENTRY(const jchar*, jni_GetStringCritical(JNIEnv *env, jstring string, jboolean *isCopy))
3198 JNIWrapper("GetStringCritical");
3199 HOTSPOT_JNI_GETSTRINGCRITICAL_ENTRY(env, string, (uintptr_t *) isCopy);
3200 GC_locker::lock_critical(thread);
3201 if (isCopy != NULL) {
3202 *isCopy = JNI_FALSE;
3203 }
3204 oop s = JNIHandles::resolve_non_null(string);
3205 int s_len = java_lang_String::length(s);
3206 typeArrayOop s_value = java_lang_String::value(s);
3207 int s_offset = java_lang_String::offset(s);
3208 const jchar* ret;
3209 if (s_len > 0) {
3210 ret = s_value->char_at_addr(s_offset);
3211 } else {
3212 ret = (jchar*) s_value->base(T_CHAR);
3213 }
3214 HOTSPOT_JNI_GETSTRINGCRITICAL_RETURN((uint16_t *) ret);
3215 return ret;
3216 JNI_END
3217
3218
3219 JNI_ENTRY(void, jni_ReleaseStringCritical(JNIEnv *env, jstring str, const jchar *chars))
3220 JNIWrapper("ReleaseStringCritical");
3221 HOTSPOT_JNI_RELEASESTRINGCRITICAL_ENTRY(env, str, (uint16_t *) chars);
3222 // The str and chars arguments are ignored
3223 GC_locker::unlock_critical(thread);
3224 HOTSPOT_JNI_RELEASESTRINGCRITICAL_RETURN();
3225 JNI_END
3226
3227
3228 JNI_ENTRY(jweak, jni_NewWeakGlobalRef(JNIEnv *env, jobject ref))
3229 JNIWrapper("jni_NewWeakGlobalRef");
3230 HOTSPOT_JNI_NEWWEAKGLOBALREF_ENTRY(env, ref);
3231 Handle ref_handle(thread, JNIHandles::resolve(ref));
3232 jweak ret = JNIHandles::make_weak_global(ref_handle);
3233 HOTSPOT_JNI_NEWWEAKGLOBALREF_RETURN(ret);
3234 return ret;
3235 JNI_END
3236
3237 // Must be JNI_ENTRY (with HandleMark)
3238 JNI_ENTRY(void, jni_DeleteWeakGlobalRef(JNIEnv *env, jweak ref))
3239 JNIWrapper("jni_DeleteWeakGlobalRef");
3240 HOTSPOT_JNI_DELETEWEAKGLOBALREF_ENTRY(env, ref);
3241 JNIHandles::destroy_weak_global(ref);
3242 HOTSPOT_JNI_DELETEWEAKGLOBALREF_RETURN();
3243 JNI_END
3244
3245
3246 JNI_QUICK_ENTRY(jboolean, jni_ExceptionCheck(JNIEnv *env))
3247 JNIWrapper("jni_ExceptionCheck");
3248 HOTSPOT_JNI_EXCEPTIONCHECK_ENTRY(env);
3249 jni_check_async_exceptions(thread);
3250 jboolean ret = (thread->has_pending_exception()) ? JNI_TRUE : JNI_FALSE;
3251 HOTSPOT_JNI_EXCEPTIONCHECK_RETURN(ret);
3252 return ret;
3253 JNI_END
3254
3255
3256 // Initialization state for three routines below relating to
3257 // java.nio.DirectBuffers
3258 static jint directBufferSupportInitializeStarted = 0;
3259 static volatile jint directBufferSupportInitializeEnded = 0;
3260 static volatile jint directBufferSupportInitializeFailed = 0;
3261 static jclass bufferClass = NULL;
3262 static jclass directBufferClass = NULL;
3263 static jclass directByteBufferClass = NULL;
3264 static jmethodID directByteBufferConstructor = NULL;
3265 static jfieldID directBufferAddressField = NULL;
3266 static jfieldID bufferCapacityField = NULL;
3267
3268 static jclass lookupOne(JNIEnv* env, const char* name, TRAPS) {
3269 Handle loader; // null (bootstrap) loader
3270 Handle protection_domain; // null protection domain
3271
3272 TempNewSymbol sym = SymbolTable::new_symbol(name, CHECK_NULL);
3273 jclass result = find_class_from_class_loader(env, sym, true, loader, protection_domain, true, CHECK_NULL);
3274
3275 if (TraceClassResolution && result != NULL) {
3276 trace_class_resolution(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(result)));
3277 }
3278 return result;
3279 }
3280
3281 // These lookups are done with the NULL (bootstrap) ClassLoader to
3282 // circumvent any security checks that would be done by jni_FindClass.
3283 JNI_ENTRY(bool, lookupDirectBufferClasses(JNIEnv* env))
3284 {
3285 if ((bufferClass = lookupOne(env, "java/nio/Buffer", thread)) == NULL) { return false; }
3286 if ((directBufferClass = lookupOne(env, "sun/nio/ch/DirectBuffer", thread)) == NULL) { return false; }
3287 if ((directByteBufferClass = lookupOne(env, "java/nio/DirectByteBuffer", thread)) == NULL) { return false; }
3288 return true;
3289 }
3290 JNI_END
3291
3292
3293 static bool initializeDirectBufferSupport(JNIEnv* env, JavaThread* thread) {
3294 if (directBufferSupportInitializeFailed) {
3295 return false;
3296 }
3297
3298 if (Atomic::cmpxchg(1, &directBufferSupportInitializeStarted, 0) == 0) {
3299 if (!lookupDirectBufferClasses(env)) {
3300 directBufferSupportInitializeFailed = 1;
3301 return false;
3302 }
3303
3304 // Make global references for these
3305 bufferClass = (jclass) env->NewGlobalRef(bufferClass);
3306 directBufferClass = (jclass) env->NewGlobalRef(directBufferClass);
3307 directByteBufferClass = (jclass) env->NewGlobalRef(directByteBufferClass);
3308
3309 // Get needed field and method IDs
3310 directByteBufferConstructor = env->GetMethodID(directByteBufferClass, "<init>", "(JI)V");
3311 if (env->ExceptionCheck()) {
3312 env->ExceptionClear();
3313 directBufferSupportInitializeFailed = 1;
3314 return false;
3315 }
3316 directBufferAddressField = env->GetFieldID(bufferClass, "address", "J");
3317 if (env->ExceptionCheck()) {
3318 env->ExceptionClear();
3319 directBufferSupportInitializeFailed = 1;
3320 return false;
3321 }
3322 bufferCapacityField = env->GetFieldID(bufferClass, "capacity", "I");
3323 if (env->ExceptionCheck()) {
3324 env->ExceptionClear();
3325 directBufferSupportInitializeFailed = 1;
3326 return false;
3327 }
3328
3329 if ((directByteBufferConstructor == NULL) ||
3330 (directBufferAddressField == NULL) ||
3331 (bufferCapacityField == NULL)) {
3332 directBufferSupportInitializeFailed = 1;
3333 return false;
3334 }
3335
3336 directBufferSupportInitializeEnded = 1;
3337 } else {
3338 while (!directBufferSupportInitializeEnded && !directBufferSupportInitializeFailed) {
3339 os::yield();
3340 }
3341 }
3342
3343 return !directBufferSupportInitializeFailed;
3344 }
3345
3346 extern "C" jobject JNICALL jni_NewDirectByteBuffer(JNIEnv *env, void* address, jlong capacity)
3347 {
3348 // thread_from_jni_environment() will block if VM is gone.
3349 JavaThread* thread = JavaThread::thread_from_jni_environment(env);
3350
3351 JNIWrapper("jni_NewDirectByteBuffer");
3352 HOTSPOT_JNI_NEWDIRECTBYTEBUFFER_ENTRY(env, address, capacity);
3353
3354 if (!directBufferSupportInitializeEnded) {
3355 if (!initializeDirectBufferSupport(env, thread)) {
3356 HOTSPOT_JNI_NEWDIRECTBYTEBUFFER_RETURN(NULL);
3357 return NULL;
3358 }
3359 }
3360
3361 // Being paranoid about accidental sign extension on address
3362 jlong addr = (jlong) ((uintptr_t) address);
3363 // NOTE that package-private DirectByteBuffer constructor currently
3364 // takes int capacity
3365 jint cap = (jint) capacity;
3366 jobject ret = env->NewObject(directByteBufferClass, directByteBufferConstructor, addr, cap);
3367 HOTSPOT_JNI_NEWDIRECTBYTEBUFFER_RETURN(ret);
3368 return ret;
3369 }
3370
3371 DT_RETURN_MARK_DECL(GetDirectBufferAddress, void*
3372 , HOTSPOT_JNI_GETDIRECTBUFFERADDRESS_RETURN((void*) _ret_ref));
3373
3374 extern "C" void* JNICALL jni_GetDirectBufferAddress(JNIEnv *env, jobject buf)
3375 {
3376 // thread_from_jni_environment() will block if VM is gone.
3377 JavaThread* thread = JavaThread::thread_from_jni_environment(env);
3378
3379 JNIWrapper("jni_GetDirectBufferAddress");
3380 HOTSPOT_JNI_GETDIRECTBUFFERADDRESS_ENTRY(env, buf);
3381 void* ret = NULL;
3382 DT_RETURN_MARK(GetDirectBufferAddress, void*, (const void*&)ret);
3383
3384 if (!directBufferSupportInitializeEnded) {
3385 if (!initializeDirectBufferSupport(env, thread)) {
3386 return 0;
3387 }
3388 }
3389
3390 if ((buf != NULL) && (!env->IsInstanceOf(buf, directBufferClass))) {
3391 return 0;
3392 }
3393
3394 ret = (void*)(intptr_t)env->GetLongField(buf, directBufferAddressField);
3395 return ret;
3396 }
3397
3398 DT_RETURN_MARK_DECL(GetDirectBufferCapacity, jlong
3399 , HOTSPOT_JNI_GETDIRECTBUFFERCAPACITY_RETURN(_ret_ref));
3400
3401 extern "C" jlong JNICALL jni_GetDirectBufferCapacity(JNIEnv *env, jobject buf)
3402 {
3403 // thread_from_jni_environment() will block if VM is gone.
3404 JavaThread* thread = JavaThread::thread_from_jni_environment(env);
3405
3406 JNIWrapper("jni_GetDirectBufferCapacity");
3407 HOTSPOT_JNI_GETDIRECTBUFFERCAPACITY_ENTRY(env, buf);
3408 jlong ret = -1;
3409 DT_RETURN_MARK(GetDirectBufferCapacity, jlong, (const jlong&)ret);
3410
3411 if (!directBufferSupportInitializeEnded) {
3412 if (!initializeDirectBufferSupport(env, thread)) {
3413 ret = 0;
3414 return ret;
3415 }
3416 }
3417
3418 if (buf == NULL) {
3419 return -1;
3420 }
3421
3422 if (!env->IsInstanceOf(buf, directBufferClass)) {
3423 return -1;
3424 }
3425
3426 // NOTE that capacity is currently an int in the implementation
3427 ret = env->GetIntField(buf, bufferCapacityField);
3428 return ret;
3429 }
3430
3431
3432 JNI_LEAF(jint, jni_GetVersion(JNIEnv *env))
3433 JNIWrapper("GetVersion");
3434 HOTSPOT_JNI_GETVERSION_ENTRY(env);
3435 HOTSPOT_JNI_GETVERSION_RETURN(CurrentVersion);
3436 return CurrentVersion;
3437 JNI_END
3438
3439 extern struct JavaVM_ main_vm;
3440
3441 JNI_LEAF(jint, jni_GetJavaVM(JNIEnv *env, JavaVM **vm))
3442 JNIWrapper("jni_GetJavaVM");
3443 HOTSPOT_JNI_GETJAVAVM_ENTRY(env, (void **) vm);
3444 *vm = (JavaVM *)(&main_vm);
3445 HOTSPOT_JNI_GETJAVAVM_RETURN(JNI_OK);
3446 return JNI_OK;
3447 JNI_END
3448
3449 // Structure containing all jni functions
3450 struct JNINativeInterface_ jni_NativeInterface = {
3451 NULL,
3452 NULL,
3453 NULL,
3454
3455 NULL,
3456
3457 jni_GetVersion,
3458
3459 jni_DefineClass,
3460 jni_FindClass,
3461
3462 jni_FromReflectedMethod,
3463 jni_FromReflectedField,
3464
3465 jni_ToReflectedMethod,
3466
3467 jni_GetSuperclass,
3468 jni_IsAssignableFrom,
3469
3470 jni_ToReflectedField,
3471
3472 jni_Throw,
3473 jni_ThrowNew,
3474 jni_ExceptionOccurred,
3475 jni_ExceptionDescribe,
3476 jni_ExceptionClear,
3477 jni_FatalError,
3478
3479 jni_PushLocalFrame,
3480 jni_PopLocalFrame,
3481
3482 jni_NewGlobalRef,
3483 jni_DeleteGlobalRef,
3484 jni_DeleteLocalRef,
3485 jni_IsSameObject,
3486
3487 jni_NewLocalRef,
3488 jni_EnsureLocalCapacity,
3489
3490 jni_AllocObject,
3491 jni_NewObject,
3492 jni_NewObjectV,
3493 jni_NewObjectA,
3494
3495 jni_GetObjectClass,
3496 jni_IsInstanceOf,
3497
3498 jni_GetMethodID,
3499
3500 jni_CallObjectMethod,
3501 jni_CallObjectMethodV,
3502 jni_CallObjectMethodA,
3503 jni_CallBooleanMethod,
3504 jni_CallBooleanMethodV,
3505 jni_CallBooleanMethodA,
3506 jni_CallByteMethod,
3507 jni_CallByteMethodV,
3508 jni_CallByteMethodA,
3509 jni_CallCharMethod,
3510 jni_CallCharMethodV,
3511 jni_CallCharMethodA,
3512 jni_CallShortMethod,
3513 jni_CallShortMethodV,
3514 jni_CallShortMethodA,
3515 jni_CallIntMethod,
3516 jni_CallIntMethodV,
3517 jni_CallIntMethodA,
3518 jni_CallLongMethod,
3519 jni_CallLongMethodV,
3520 jni_CallLongMethodA,
3521 jni_CallFloatMethod,
3522 jni_CallFloatMethodV,
3523 jni_CallFloatMethodA,
3524 jni_CallDoubleMethod,
3525 jni_CallDoubleMethodV,
3526 jni_CallDoubleMethodA,
3527 jni_CallVoidMethod,
3528 jni_CallVoidMethodV,
3529 jni_CallVoidMethodA,
3530
3531 jni_CallNonvirtualObjectMethod,
3532 jni_CallNonvirtualObjectMethodV,
3533 jni_CallNonvirtualObjectMethodA,
3534 jni_CallNonvirtualBooleanMethod,
3535 jni_CallNonvirtualBooleanMethodV,
3536 jni_CallNonvirtualBooleanMethodA,
3537 jni_CallNonvirtualByteMethod,
3538 jni_CallNonvirtualByteMethodV,
3539 jni_CallNonvirtualByteMethodA,
3540 jni_CallNonvirtualCharMethod,
3541 jni_CallNonvirtualCharMethodV,
3542 jni_CallNonvirtualCharMethodA,
3543 jni_CallNonvirtualShortMethod,
3544 jni_CallNonvirtualShortMethodV,
3545 jni_CallNonvirtualShortMethodA,
3546 jni_CallNonvirtualIntMethod,
3547 jni_CallNonvirtualIntMethodV,
3548 jni_CallNonvirtualIntMethodA,
3549 jni_CallNonvirtualLongMethod,
3550 jni_CallNonvirtualLongMethodV,
3551 jni_CallNonvirtualLongMethodA,
3552 jni_CallNonvirtualFloatMethod,
3553 jni_CallNonvirtualFloatMethodV,
3554 jni_CallNonvirtualFloatMethodA,
3555 jni_CallNonvirtualDoubleMethod,
3556 jni_CallNonvirtualDoubleMethodV,
3557 jni_CallNonvirtualDoubleMethodA,
3558 jni_CallNonvirtualVoidMethod,
3559 jni_CallNonvirtualVoidMethodV,
3560 jni_CallNonvirtualVoidMethodA,
3561
3562 jni_GetFieldID,
3563
3564 jni_GetObjectField,
3565 jni_GetBooleanField,
3566 jni_GetByteField,
3567 jni_GetCharField,
3568 jni_GetShortField,
3569 jni_GetIntField,
3570 jni_GetLongField,
3571 jni_GetFloatField,
3572 jni_GetDoubleField,
3573
3574 jni_SetObjectField,
3575 jni_SetBooleanField,
3576 jni_SetByteField,
3577 jni_SetCharField,
3578 jni_SetShortField,
3579 jni_SetIntField,
3580 jni_SetLongField,
3581 jni_SetFloatField,
3582 jni_SetDoubleField,
3583
3584 jni_GetStaticMethodID,
3585
3586 jni_CallStaticObjectMethod,
3587 jni_CallStaticObjectMethodV,
3588 jni_CallStaticObjectMethodA,
3589 jni_CallStaticBooleanMethod,
3590 jni_CallStaticBooleanMethodV,
3591 jni_CallStaticBooleanMethodA,
3592 jni_CallStaticByteMethod,
3593 jni_CallStaticByteMethodV,
3594 jni_CallStaticByteMethodA,
3595 jni_CallStaticCharMethod,
3596 jni_CallStaticCharMethodV,
3597 jni_CallStaticCharMethodA,
3598 jni_CallStaticShortMethod,
3599 jni_CallStaticShortMethodV,
3600 jni_CallStaticShortMethodA,
3601 jni_CallStaticIntMethod,
3602 jni_CallStaticIntMethodV,
3603 jni_CallStaticIntMethodA,
3604 jni_CallStaticLongMethod,
3605 jni_CallStaticLongMethodV,
3606 jni_CallStaticLongMethodA,
3607 jni_CallStaticFloatMethod,
3608 jni_CallStaticFloatMethodV,
3609 jni_CallStaticFloatMethodA,
3610 jni_CallStaticDoubleMethod,
3611 jni_CallStaticDoubleMethodV,
3612 jni_CallStaticDoubleMethodA,
3613 jni_CallStaticVoidMethod,
3614 jni_CallStaticVoidMethodV,
3615 jni_CallStaticVoidMethodA,
3616
3617 jni_GetStaticFieldID,
3618
3619 jni_GetStaticObjectField,
3620 jni_GetStaticBooleanField,
3621 jni_GetStaticByteField,
3622 jni_GetStaticCharField,
3623 jni_GetStaticShortField,
3624 jni_GetStaticIntField,
3625 jni_GetStaticLongField,
3626 jni_GetStaticFloatField,
3627 jni_GetStaticDoubleField,
3628
3629 jni_SetStaticObjectField,
3630 jni_SetStaticBooleanField,
3631 jni_SetStaticByteField,
3632 jni_SetStaticCharField,
3633 jni_SetStaticShortField,
3634 jni_SetStaticIntField,
3635 jni_SetStaticLongField,
3636 jni_SetStaticFloatField,
3637 jni_SetStaticDoubleField,
3638
3639 jni_NewString,
3640 jni_GetStringLength,
3641 jni_GetStringChars,
3642 jni_ReleaseStringChars,
3643
3644 jni_NewStringUTF,
3645 jni_GetStringUTFLength,
3646 jni_GetStringUTFChars,
3647 jni_ReleaseStringUTFChars,
3648
3649 jni_GetArrayLength,
3650
3651 jni_NewObjectArray,
3652 jni_GetObjectArrayElement,
3653 jni_SetObjectArrayElement,
3654
3655 jni_NewBooleanArray,
3656 jni_NewByteArray,
3657 jni_NewCharArray,
3658 jni_NewShortArray,
3659 jni_NewIntArray,
3660 jni_NewLongArray,
3661 jni_NewFloatArray,
3662 jni_NewDoubleArray,
3663
3664 jni_GetBooleanArrayElements,
3665 jni_GetByteArrayElements,
3666 jni_GetCharArrayElements,
3667 jni_GetShortArrayElements,
3668 jni_GetIntArrayElements,
3669 jni_GetLongArrayElements,
3670 jni_GetFloatArrayElements,
3671 jni_GetDoubleArrayElements,
3672
3673 jni_ReleaseBooleanArrayElements,
3674 jni_ReleaseByteArrayElements,
3675 jni_ReleaseCharArrayElements,
3676 jni_ReleaseShortArrayElements,
3677 jni_ReleaseIntArrayElements,
3678 jni_ReleaseLongArrayElements,
3679 jni_ReleaseFloatArrayElements,
3680 jni_ReleaseDoubleArrayElements,
3681
3682 jni_GetBooleanArrayRegion,
3683 jni_GetByteArrayRegion,
3684 jni_GetCharArrayRegion,
3685 jni_GetShortArrayRegion,
3686 jni_GetIntArrayRegion,
3687 jni_GetLongArrayRegion,
3688 jni_GetFloatArrayRegion,
3689 jni_GetDoubleArrayRegion,
3690
3691 jni_SetBooleanArrayRegion,
3692 jni_SetByteArrayRegion,
3693 jni_SetCharArrayRegion,
3694 jni_SetShortArrayRegion,
3695 jni_SetIntArrayRegion,
3696 jni_SetLongArrayRegion,
3697 jni_SetFloatArrayRegion,
3698 jni_SetDoubleArrayRegion,
3699
3700 jni_RegisterNatives,
3701 jni_UnregisterNatives,
3702
3703 jni_MonitorEnter,
3704 jni_MonitorExit,
3705
3706 jni_GetJavaVM,
3707
3708 jni_GetStringRegion,
3709 jni_GetStringUTFRegion,
3710
3711 jni_GetPrimitiveArrayCritical,
3712 jni_ReleasePrimitiveArrayCritical,
3713
3714 jni_GetStringCritical,
3715 jni_ReleaseStringCritical,
3716
3717 jni_NewWeakGlobalRef,
3718 jni_DeleteWeakGlobalRef,
3719
3720 jni_ExceptionCheck,
3721
3722 jni_NewDirectByteBuffer,
3723 jni_GetDirectBufferAddress,
3724 jni_GetDirectBufferCapacity,
3725
3726 // New 1_6 features
3727
3728 jni_GetObjectRefType
3729 };
3730
3731
3732 // For jvmti use to modify jni function table.
3733 // Java threads in native contiues to run until it is transitioned
3734 // to VM at safepoint. Before the transition or before it is blocked
3735 // for safepoint it may access jni function table. VM could crash if
3736 // any java thread access the jni function table in the middle of memcpy.
3737 // To avoid this each function pointers are copied automically.
3738 void copy_jni_function_table(const struct JNINativeInterface_ *new_jni_NativeInterface) {
3739 assert(SafepointSynchronize::is_at_safepoint(), "must be at safepoint");
3740 intptr_t *a = (intptr_t *) jni_functions();
3741 intptr_t *b = (intptr_t *) new_jni_NativeInterface;
3742 for (uint i=0; i < sizeof(struct JNINativeInterface_)/sizeof(void *); i++) {
3743 Atomic::store_ptr(*b++, a++);
3744 }
3745 }
3746
3747 void quicken_jni_functions() {
3748 // Replace Get<Primitive>Field with fast versions
3749 if (UseFastJNIAccessors && !JvmtiExport::can_post_field_access()
3750 && !VerifyJNIFields && !TraceJNICalls && !CountJNICalls && !CheckJNICalls
3751 #if defined(_WINDOWS) && defined(IA32) && defined(COMPILER2)
3752 // windows x86 currently needs SEH wrapper and the gain of the fast
3753 // versions currently isn't certain for server vm on uniprocessor.
3754 && os::is_MP()
3755 #endif
3756 ) {
3757 address func;
3758 func = JNI_FastGetField::generate_fast_get_boolean_field();
3759 if (func != (address)-1) {
3760 jni_NativeInterface.GetBooleanField = (GetBooleanField_t)func;
3761 }
3762 func = JNI_FastGetField::generate_fast_get_byte_field();
3763 if (func != (address)-1) {
3764 jni_NativeInterface.GetByteField = (GetByteField_t)func;
3765 }
3766 func = JNI_FastGetField::generate_fast_get_char_field();
3767 if (func != (address)-1) {
3768 jni_NativeInterface.GetCharField = (GetCharField_t)func;
3769 }
3770 func = JNI_FastGetField::generate_fast_get_short_field();
3771 if (func != (address)-1) {
3772 jni_NativeInterface.GetShortField = (GetShortField_t)func;
3773 }
3774 func = JNI_FastGetField::generate_fast_get_int_field();
3775 if (func != (address)-1) {
3776 jni_NativeInterface.GetIntField = (GetIntField_t)func;
3777 }
3778 func = JNI_FastGetField::generate_fast_get_long_field();
3779 if (func != (address)-1) {
3780 jni_NativeInterface.GetLongField = (GetLongField_t)func;
3781 }
3782 func = JNI_FastGetField::generate_fast_get_float_field();
3783 if (func != (address)-1) {
3784 jni_NativeInterface.GetFloatField = (GetFloatField_t)func;
3785 }
3786 func = JNI_FastGetField::generate_fast_get_double_field();
3787 if (func != (address)-1) {
3788 jni_NativeInterface.GetDoubleField = (GetDoubleField_t)func;
3789 }
3790 }
3791 }
3792
3793 // Returns the function structure
3794 struct JNINativeInterface_* jni_functions() {
3795 #if INCLUDE_JNI_CHECK
3796 if (CheckJNICalls) return jni_functions_check();
3797 #endif // INCLUDE_JNI_CHECK
3798 return &jni_NativeInterface;
3799 }
3800
3801 // Returns the function structure
3802 struct JNINativeInterface_* jni_functions_nocheck() {
3803 return &jni_NativeInterface;
3804 }
3805
3806
3807 // Invocation API
3808
3809
3810 // Forward declaration
3811 extern const struct JNIInvokeInterface_ jni_InvokeInterface;
3812
3813 // Global invocation API vars
3814 volatile jint vm_created = 0;
3815 // Indicate whether it is safe to recreate VM
3816 volatile jint safe_to_recreate_vm = 1;
3817 struct JavaVM_ main_vm = {&jni_InvokeInterface};
3818
3819
3820 #define JAVASTACKSIZE (400 * 1024) /* Default size of a thread java stack */
3821 enum { VERIFY_NONE, VERIFY_REMOTE, VERIFY_ALL };
3822
3823 DT_RETURN_MARK_DECL(GetDefaultJavaVMInitArgs, jint
3824 , HOTSPOT_JNI_GETDEFAULTJAVAVMINITARGS_RETURN(_ret_ref));
3825
3826 _JNI_IMPORT_OR_EXPORT_ jint JNICALL JNI_GetDefaultJavaVMInitArgs(void *args_) {
3827 HOTSPOT_JNI_GETDEFAULTJAVAVMINITARGS_ENTRY(args_);
3828 JDK1_1InitArgs *args = (JDK1_1InitArgs *)args_;
3829 jint ret = JNI_ERR;
3830 DT_RETURN_MARK(GetDefaultJavaVMInitArgs, jint, (const jint&)ret);
3831
3832 if (Threads::is_supported_jni_version(args->version)) {
3833 ret = JNI_OK;
3834 }
3835 // 1.1 style no longer supported in hotspot.
3836 // According the JNI spec, we should update args->version on return.
3837 // We also use the structure to communicate with launcher about default
3838 // stack size.
3839 if (args->version == JNI_VERSION_1_1) {
3840 args->version = JNI_VERSION_1_2;
3841 // javaStackSize is int in arguments structure
3842 assert(jlong(ThreadStackSize) * K < INT_MAX, "integer overflow");
3843 args->javaStackSize = (jint)(ThreadStackSize * K);
3844 }
3845 return ret;
3846 }
3847
3848 #ifndef PRODUCT
3849
3850 #include "gc_implementation/shared/gcTimer.hpp"
3851 #include "gc_interface/collectedHeap.hpp"
3852 #if INCLUDE_ALL_GCS
3853 #include "gc_implementation/g1/heapRegionRemSet.hpp"
3854 #endif
3855 #include "utilities/quickSort.hpp"
3856 #include "utilities/ostream.hpp"
3857 #if INCLUDE_VM_STRUCTS
3858 #include "runtime/vmStructs.hpp"
3859 #endif
3860
3861 #define run_unit_test(unit_test_function_call) \
3862 tty->print_cr("Running test: " #unit_test_function_call); \
3863 unit_test_function_call
3864
3865 // Forward declaration
3866 void TestReservedSpace_test();
3867 void TestReserveMemorySpecial_test();
3868 void TestVirtualSpace_test();
3869 void TestMetaspaceAux_test();
3870 void TestMetachunk_test();
3871 void TestVirtualSpaceNode_test();
3872 void TestNewSize_test();
3873 void TestOldSize_test();
3874 void TestKlass_test();
3875 void TestBitMap_test();
3876 void TestAsUtf8();
3877 #if INCLUDE_ALL_GCS
3878 void TestOldFreeSpaceCalculation_test();
3879 void TestG1BiasedArray_test();
3880 void TestBufferingOopClosure_test();
3881 void TestCodeCacheRemSet_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(TestReservedSpace_test());
3888 run_unit_test(TestReserveMemorySpecial_test());
3889 run_unit_test(TestVirtualSpace_test());
3890 run_unit_test(TestMetaspaceAux_test());
3891 run_unit_test(TestMetachunk_test());
3892 run_unit_test(TestVirtualSpaceNode_test());
3893 run_unit_test(GlobalDefinitions::test_globals());
3894 run_unit_test(GCTimerAllTest::all());
3895 run_unit_test(arrayOopDesc::test_max_array_length());
3896 run_unit_test(CollectedHeap::test_is_in());
3897 run_unit_test(QuickSort::test_quick_sort());
3898 run_unit_test(AltHashing::test_alt_hash());
3899 run_unit_test(test_loggc_filename());
3900 run_unit_test(TestNewSize_test());
3901 run_unit_test(TestOldSize_test());
3902 run_unit_test(TestKlass_test());
3903 run_unit_test(TestBitMap_test());
3904 run_unit_test(TestAsUtf8());
3905 #if INCLUDE_VM_STRUCTS
3906 run_unit_test(VMStructs::test());
3907 #endif
3908 #if INCLUDE_ALL_GCS
3909 run_unit_test(TestOldFreeSpaceCalculation_test());
3910 run_unit_test(TestG1BiasedArray_test());
3911 run_unit_test(HeapRegionRemSet::test_prt());
3912 run_unit_test(TestBufferingOopClosure_test());
3913 run_unit_test(TestCodeCacheRemSet_test());
3914 #endif
3915 tty->print_cr("All internal VM tests passed");
3916 }
3917 }
3918
3919 #undef run_unit_test
3920
3921 #endif
3922
3923 DT_RETURN_MARK_DECL(CreateJavaVM, jint
3924 , HOTSPOT_JNI_CREATEJAVAVM_RETURN(_ret_ref));
3925
3926 _JNI_IMPORT_OR_EXPORT_ jint JNICALL JNI_CreateJavaVM(JavaVM **vm, void **penv, void *args) {
3927 HOTSPOT_JNI_CREATEJAVAVM_ENTRY((void **) vm, penv, args);
3928
3929 jint result = JNI_ERR;
3930 DT_RETURN_MARK(CreateJavaVM, jint, (const jint&)result);
3931
3932 // We're about to use Atomic::xchg for synchronization. Some Zero
3933 // platforms use the GCC builtin __sync_lock_test_and_set for this,
3934 // but __sync_lock_test_and_set is not guaranteed to do what we want
3935 // on all architectures. So we check it works before relying on it.
3936 #if defined(ZERO) && defined(ASSERT)
3937 {
3938 jint a = 0xcafebabe;
3939 jint b = Atomic::xchg(0xdeadbeef, &a);
3940 void *c = &a;
3941 void *d = Atomic::xchg_ptr(&b, &c);
3942 assert(a == (jint) 0xdeadbeef && b == (jint) 0xcafebabe, "Atomic::xchg() works");
3943 assert(c == &b && d == &a, "Atomic::xchg_ptr() works");
3944 }
3945 #endif // ZERO && ASSERT
3946
3947 // At the moment it's only possible to have one Java VM,
3948 // since some of the runtime state is in global variables.
3949
3950 // We cannot use our mutex locks here, since they only work on
3951 // Threads. We do an atomic compare and exchange to ensure only
3952 // one thread can call this method at a time
3953
3954 // We use Atomic::xchg rather than Atomic::add/dec since on some platforms
3955 // the add/dec implementations are dependent on whether we are running
3956 // on a multiprocessor, and at this stage of initialization the os::is_MP
3957 // function used to determine this will always return false. Atomic::xchg
3958 // does not have this problem.
3959 if (Atomic::xchg(1, &vm_created) == 1) {
3960 return JNI_EEXIST; // already created, or create attempt in progress
3961 }
3962 if (Atomic::xchg(0, &safe_to_recreate_vm) == 0) {
3963 return JNI_ERR; // someone tried and failed and retry not allowed.
3964 }
3965
3966 assert(vm_created == 1, "vm_created is true during the creation");
3967
3968 /**
3969 * Certain errors during initialization are recoverable and do not
3970 * prevent this method from being called again at a later time
3971 * (perhaps with different arguments). However, at a certain
3972 * point during initialization if an error occurs we cannot allow
3973 * this function to be called again (or it will crash). In those
3974 * situations, the 'canTryAgain' flag is set to false, which atomically
3975 * sets safe_to_recreate_vm to 1, such that any new call to
3976 * JNI_CreateJavaVM will immediately fail using the above logic.
3977 */
3978 bool can_try_again = true;
3979
3980 result = Threads::create_vm((JavaVMInitArgs*) args, &can_try_again);
3981 if (result == JNI_OK) {
3982 JavaThread *thread = JavaThread::current();
3983 assert(!thread->has_pending_exception(), "should have returned not OK");
3984 /* thread is thread_in_vm here */
3985 *vm = (JavaVM *)(&main_vm);
3986 *(JNIEnv**)penv = thread->jni_environment();
3987
3988 // Tracks the time application was running before GC
3989 RuntimeService::record_application_start();
3990
3991 // Notify JVMTI
3992 if (JvmtiExport::should_post_thread_life()) {
3993 JvmtiExport::post_thread_start(thread);
3994 }
3995
3996 EventThreadStart event;
3997 if (event.should_commit()) {
3998 event.set_javalangthread(java_lang_Thread::thread_id(thread->threadObj()));
3999 event.commit();
4000 }
4001
4002 #ifndef PRODUCT
4003 #ifndef CALL_TEST_FUNC_WITH_WRAPPER_IF_NEEDED
4004 #define CALL_TEST_FUNC_WITH_WRAPPER_IF_NEEDED(f) f()
4005 #endif
4006
4007 // Check if we should compile all classes on bootclasspath
4008 if (CompileTheWorld) ClassLoader::compile_the_world();
4009 if (ReplayCompiles) ciReplay::replay(thread);
4010
4011 // Some platforms (like Win*) need a wrapper around these test
4012 // functions in order to properly handle error conditions.
4013 CALL_TEST_FUNC_WITH_WRAPPER_IF_NEEDED(test_error_handler);
4014 CALL_TEST_FUNC_WITH_WRAPPER_IF_NEEDED(execute_internal_vm_tests);
4015 #endif
4016
4017 // Since this is not a JVM_ENTRY we have to set the thread state manually before leaving.
4018 ThreadStateTransition::transition_and_fence(thread, _thread_in_vm, _thread_in_native);
4019 } else {
4020 // If create_vm exits because of a pending exception, exit with that
4021 // exception. In the future when we figure out how to reclaim memory,
4022 // we may be able to exit with JNI_ERR and allow the calling application
4023 // to continue.
4024 if (Universe::is_fully_initialized()) {
4025 // otherwise no pending exception possible - VM will already have aborted
4026 JavaThread* THREAD = JavaThread::current();
4027 if (HAS_PENDING_EXCEPTION) {
4028 HandleMark hm;
4029 vm_exit_during_initialization(Handle(THREAD, PENDING_EXCEPTION));
4030 }
4031 }
4032
4033 if (can_try_again) {
4034 // reset safe_to_recreate_vm to 1 so that retrial would be possible
4035 safe_to_recreate_vm = 1;
4036 }
4037
4038 // Creation failed. We must reset vm_created
4039 *vm = 0;
4040 *(JNIEnv**)penv = 0;
4041 // reset vm_created last to avoid race condition. Use OrderAccess to
4042 // control both compiler and architectural-based reordering.
4043 OrderAccess::release_store(&vm_created, 0);
4044 }
4045
4046 return result;
4047 }
4048
4049
4050 _JNI_IMPORT_OR_EXPORT_ jint JNICALL JNI_GetCreatedJavaVMs(JavaVM **vm_buf, jsize bufLen, jsize *numVMs) {
4051 // See bug 4367188, the wrapper can sometimes cause VM crashes
4052 // JNIWrapper("GetCreatedJavaVMs");
4053
4054 HOTSPOT_JNI_GETCREATEDJAVAVMS_ENTRY((void **) vm_buf, bufLen, (uintptr_t *) numVMs);
4055
4056 if (vm_created) {
4057 if (numVMs != NULL) *numVMs = 1;
4058 if (bufLen > 0) *vm_buf = (JavaVM *)(&main_vm);
4059 } else {
4060 if (numVMs != NULL) *numVMs = 0;
4061 }
4062 HOTSPOT_JNI_GETCREATEDJAVAVMS_RETURN(JNI_OK);
4063 return JNI_OK;
4064 }
4065
4066 extern "C" {
4067
4068 DT_RETURN_MARK_DECL(DestroyJavaVM, jint
4069 , HOTSPOT_JNI_DESTROYJAVAVM_RETURN(_ret_ref));
4070
4071 jint JNICALL jni_DestroyJavaVM(JavaVM *vm) {
4072 HOTSPOT_JNI_DESTROYJAVAVM_ENTRY(vm);
4073 jint res = JNI_ERR;
4074 DT_RETURN_MARK(DestroyJavaVM, jint, (const jint&)res);
4075
4076 if (!vm_created) {
4077 res = JNI_ERR;
4078 return res;
4079 }
4080
4081 JNIWrapper("DestroyJavaVM");
4082 JNIEnv *env;
4083 JavaVMAttachArgs destroyargs;
4084 destroyargs.version = CurrentVersion;
4085 destroyargs.name = (char *)"DestroyJavaVM";
4086 destroyargs.group = NULL;
4087 res = vm->AttachCurrentThread((void **)&env, (void *)&destroyargs);
4088 if (res != JNI_OK) {
4089 return res;
4090 }
4091
4092 // Since this is not a JVM_ENTRY we have to set the thread state manually before entering.
4093 JavaThread* thread = JavaThread::current();
4094 ThreadStateTransition::transition_from_native(thread, _thread_in_vm);
4095 if (Threads::destroy_vm()) {
4096 // Should not change thread state, VM is gone
4097 vm_created = false;
4098 res = JNI_OK;
4099 return res;
4100 } else {
4101 ThreadStateTransition::transition_and_fence(thread, _thread_in_vm, _thread_in_native);
4102 res = JNI_ERR;
4103 return res;
4104 }
4105 }
4106
4107
4108 static jint attach_current_thread(JavaVM *vm, void **penv, void *_args, bool daemon) {
4109 JavaVMAttachArgs *args = (JavaVMAttachArgs *) _args;
4110
4111 // Check below commented out from JDK1.2fcs as well
4112 /*
4113 if (args && (args->version != JNI_VERSION_1_1 || args->version != JNI_VERSION_1_2)) {
4114 return JNI_EVERSION;
4115 }
4116 */
4117
4118 Thread* t = ThreadLocalStorage::get_thread_slow();
4119 if (t != NULL) {
4120 // If the thread has been attached this operation is a no-op
4121 *(JNIEnv**)penv = ((JavaThread*) t)->jni_environment();
4122 return JNI_OK;
4123 }
4124
4125 // Create a thread and mark it as attaching so it will be skipped by the
4126 // ThreadsListEnumerator - see CR 6404306
4127 JavaThread* thread = new JavaThread(true);
4128
4129 // Set correct safepoint info. The thread is going to call into Java when
4130 // initializing the Java level thread object. Hence, the correct state must
4131 // be set in order for the Safepoint code to deal with it correctly.
4132 thread->set_thread_state(_thread_in_vm);
4133 // Must do this before initialize_thread_local_storage
4134 thread->record_stack_base_and_size();
4135
4136 thread->initialize_thread_local_storage();
4137
4138 if (!os::create_attached_thread(thread)) {
4139 delete thread;
4140 return JNI_ERR;
4141 }
4142 // Enable stack overflow checks
4143 thread->create_stack_guard_pages();
4144
4145 thread->initialize_tlab();
4146
4147 thread->cache_global_variables();
4148
4149 // Crucial that we do not have a safepoint check for this thread, since it has
4150 // not been added to the Thread list yet.
4151 { Threads_lock->lock_without_safepoint_check();
4152 // This must be inside this lock in order to get FullGCALot to work properly, i.e., to
4153 // avoid this thread trying to do a GC before it is added to the thread-list
4154 thread->set_active_handles(JNIHandleBlock::allocate_block());
4155 Threads::add(thread, daemon);
4156 Threads_lock->unlock();
4157 }
4158 // Create thread group and name info from attach arguments
4159 oop group = NULL;
4160 char* thread_name = NULL;
4161 if (args != NULL && Threads::is_supported_jni_version(args->version)) {
4162 group = JNIHandles::resolve(args->group);
4163 thread_name = args->name; // may be NULL
4164 }
4165 if (group == NULL) group = Universe::main_thread_group();
4166
4167 // Create Java level thread object and attach it to this thread
4168 bool attach_failed = false;
4169 {
4170 EXCEPTION_MARK;
4171 HandleMark hm(THREAD);
4172 Handle thread_group(THREAD, group);
4173 thread->allocate_threadObj(thread_group, thread_name, daemon, THREAD);
4174 if (HAS_PENDING_EXCEPTION) {
4175 CLEAR_PENDING_EXCEPTION;
4176 // cleanup outside the handle mark.
4177 attach_failed = true;
4178 }
4179 }
4180
4181 if (attach_failed) {
4182 // Added missing cleanup
4183 thread->cleanup_failed_attach_current_thread();
4184 return JNI_ERR;
4185 }
4186
4187 // mark the thread as no longer attaching
4188 // this uses a fence to push the change through so we don't have
4189 // to regrab the threads_lock
4190 thread->set_done_attaching_via_jni();
4191
4192 // Set java thread status.
4193 java_lang_Thread::set_thread_status(thread->threadObj(),
4194 java_lang_Thread::RUNNABLE);
4195
4196 // Notify the debugger
4197 if (JvmtiExport::should_post_thread_life()) {
4198 JvmtiExport::post_thread_start(thread);
4199 }
4200
4201 EventThreadStart event;
4202 if (event.should_commit()) {
4203 event.set_javalangthread(java_lang_Thread::thread_id(thread->threadObj()));
4204 event.commit();
4205 }
4206
4207 *(JNIEnv**)penv = thread->jni_environment();
4208
4209 // Now leaving the VM, so change thread_state. This is normally automatically taken care
4210 // of in the JVM_ENTRY. But in this situation we have to do it manually. Notice, that by
4211 // using ThreadStateTransition::transition, we do a callback to the safepoint code if
4212 // needed.
4213
4214 ThreadStateTransition::transition_and_fence(thread, _thread_in_vm, _thread_in_native);
4215
4216 // Perform any platform dependent FPU setup
4217 os::setup_fpu();
4218
4219 return JNI_OK;
4220 }
4221
4222
4223 jint JNICALL jni_AttachCurrentThread(JavaVM *vm, void **penv, void *_args) {
4224 HOTSPOT_JNI_ATTACHCURRENTTHREAD_ENTRY(vm, penv, _args);
4225 if (!vm_created) {
4226 HOTSPOT_JNI_ATTACHCURRENTTHREAD_RETURN((uint32_t) JNI_ERR);
4227 return JNI_ERR;
4228 }
4229
4230 JNIWrapper("AttachCurrentThread");
4231 jint ret = attach_current_thread(vm, penv, _args, false);
4232 HOTSPOT_JNI_ATTACHCURRENTTHREAD_RETURN(ret);
4233 return ret;
4234 }
4235
4236
4237 jint JNICALL jni_DetachCurrentThread(JavaVM *vm) {
4238 HOTSPOT_JNI_DETACHCURRENTTHREAD_ENTRY(vm);
4239 VM_Exit::block_if_vm_exited();
4240
4241 JNIWrapper("DetachCurrentThread");
4242
4243 // If the thread has been deattacted the operations is a no-op
4244 if (ThreadLocalStorage::thread() == NULL) {
4245 HOTSPOT_JNI_DETACHCURRENTTHREAD_RETURN(JNI_OK);
4246 return JNI_OK;
4247 }
4248
4249 JavaThread* thread = JavaThread::current();
4250 if (thread->has_last_Java_frame()) {
4251 HOTSPOT_JNI_DETACHCURRENTTHREAD_RETURN((uint32_t) JNI_ERR);
4252 // Can't detach a thread that's running java, that can't work.
4253 return JNI_ERR;
4254 }
4255
4256 // Safepoint support. Have to do call-back to safepoint code, if in the
4257 // middel of a safepoint operation
4258 ThreadStateTransition::transition_from_native(thread, _thread_in_vm);
4259
4260 // XXX: Note that JavaThread::exit() call below removes the guards on the
4261 // stack pages set up via enable_stack_{red,yellow}_zone() calls
4262 // above in jni_AttachCurrentThread. Unfortunately, while the setting
4263 // of the guards is visible in jni_AttachCurrentThread above,
4264 // the removal of the guards is buried below in JavaThread::exit()
4265 // here. The abstraction should be more symmetrically either exposed
4266 // or hidden (e.g. it could probably be hidden in the same
4267 // (platform-dependent) methods where we do alternate stack
4268 // maintenance work?)
4269 thread->exit(false, JavaThread::jni_detach);
4270 delete thread;
4271
4272 HOTSPOT_JNI_DETACHCURRENTTHREAD_RETURN(JNI_OK);
4273 return JNI_OK;
4274 }
4275
4276 DT_RETURN_MARK_DECL(GetEnv, jint
4277 , HOTSPOT_JNI_GETENV_RETURN(_ret_ref));
4278
4279 jint JNICALL jni_GetEnv(JavaVM *vm, void **penv, jint version) {
4280 HOTSPOT_JNI_GETENV_ENTRY(vm, penv, version);
4281 jint ret = JNI_ERR;
4282 DT_RETURN_MARK(GetEnv, jint, (const jint&)ret);
4283
4284 if (!vm_created) {
4285 *penv = NULL;
4286 ret = JNI_EDETACHED;
4287 return ret;
4288 }
4289
4290 if (JniExportedInterface::GetExportedInterface(vm, penv, version, &ret)) {
4291 return ret;
4292 }
4293
4294 #ifndef JVMPI_VERSION_1
4295 // need these in order to be polite about older agents
4296 #define JVMPI_VERSION_1 ((jint)0x10000001)
4297 #define JVMPI_VERSION_1_1 ((jint)0x10000002)
4298 #define JVMPI_VERSION_1_2 ((jint)0x10000003)
4299 #endif // !JVMPI_VERSION_1
4300
4301 Thread* thread = ThreadLocalStorage::thread();
4302 if (thread != NULL && thread->is_Java_thread()) {
4303 if (Threads::is_supported_jni_version_including_1_1(version)) {
4304 *(JNIEnv**)penv = ((JavaThread*) thread)->jni_environment();
4305 ret = JNI_OK;
4306 return ret;
4307
4308 } else if (version == JVMPI_VERSION_1 ||
4309 version == JVMPI_VERSION_1_1 ||
4310 version == JVMPI_VERSION_1_2) {
4311 tty->print_cr("ERROR: JVMPI, an experimental interface, is no longer supported.");
4312 tty->print_cr("Please use the supported interface: the JVM Tool Interface (JVM TI).");
4313 ret = JNI_EVERSION;
4314 return ret;
4315 } else if (JvmtiExport::is_jvmdi_version(version)) {
4316 tty->print_cr("FATAL ERROR: JVMDI is no longer supported.");
4317 tty->print_cr("Please use the supported interface: the JVM Tool Interface (JVM TI).");
4318 ret = JNI_EVERSION;
4319 return ret;
4320 } else {
4321 *penv = NULL;
4322 ret = JNI_EVERSION;
4323 return ret;
4324 }
4325 } else {
4326 *penv = NULL;
4327 ret = JNI_EDETACHED;
4328 return ret;
4329 }
4330 }
4331
4332
4333 jint JNICALL jni_AttachCurrentThreadAsDaemon(JavaVM *vm, void **penv, void *_args) {
4334 HOTSPOT_JNI_ATTACHCURRENTTHREADASDAEMON_ENTRY(vm, penv, _args);
4335 if (!vm_created) {
4336 HOTSPOT_JNI_ATTACHCURRENTTHREADASDAEMON_RETURN((uint32_t) JNI_ERR);
4337 return JNI_ERR;
4338 }
4339
4340 JNIWrapper("AttachCurrentThreadAsDaemon");
4341 jint ret = attach_current_thread(vm, penv, _args, true);
4342 HOTSPOT_JNI_ATTACHCURRENTTHREADASDAEMON_RETURN(ret);
4343 return ret;
4344 }
4345
4346
4347 } // End extern "C"
4348
4349 const struct JNIInvokeInterface_ jni_InvokeInterface = {
4350 NULL,
4351 NULL,
4352 NULL,
4353
4354 jni_DestroyJavaVM,
4355 jni_AttachCurrentThread,
4356 jni_DetachCurrentThread,
4357 jni_GetEnv,
4358 jni_AttachCurrentThreadAsDaemon
4359 };