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 "memory/allocation.hpp"
36 #include "memory/allocation.inline.hpp"
37 #include "memory/gcLocker.inline.hpp"
38 #include "memory/oopFactory.hpp"
39 #include "memory/universe.inline.hpp"
40 #include "oops/instanceKlass.hpp"
41 #include "oops/instanceOop.hpp"
42 #include "oops/markOop.hpp"
43 #include "oops/method.hpp"
44 #include "oops/objArrayKlass.hpp"
45 #include "oops/objArrayOop.inline.hpp"
46 #include "oops/oop.inline.hpp"
47 #include "oops/symbol.hpp"
48 #include "oops/typeArrayKlass.hpp"
49 #include "oops/typeArrayOop.hpp"
50 #include "prims/jni.h"
51 #include "prims/jniCheck.hpp"
52 #include "prims/jniExport.hpp"
53 #include "prims/jniFastGetField.hpp"
54 #include "prims/jvm.h"
55 #include "prims/jvm_misc.hpp"
56 #include "prims/jvmtiExport.hpp"
57 #include "prims/jvmtiThreadState.hpp"
58 #include "runtime/atomic.inline.hpp"
59 #include "runtime/compilationPolicy.hpp"
60 #include "runtime/fieldDescriptor.hpp"
61 #include "runtime/fprofiler.hpp"
62 #include "runtime/handles.inline.hpp"
63 #include "runtime/interfaceSupport.hpp"
64 #include "runtime/java.hpp"
65 #include "runtime/javaCalls.hpp"
66 #include "runtime/jfieldIDWorkaround.hpp"
67 #include "runtime/orderAccess.inline.hpp"
68 #include "runtime/reflection.hpp"
69 #include "runtime/sharedRuntime.hpp"
70 #include "runtime/signature.hpp"
71 #include "runtime/thread.inline.hpp"
72 #include "runtime/vm_operations.hpp"
73 #include "services/memTracker.hpp"
74 #include "services/runtimeService.hpp"
75 #include "trace/tracing.hpp"
76 #include "utilities/defaultStream.hpp"
77 #include "utilities/dtrace.hpp"
78 #include "utilities/events.hpp"
79 #include "utilities/histogram.hpp"
80 #include "utilities/macros.hpp"
81 #if INCLUDE_ALL_GCS
82 #include "gc_implementation/g1/g1SATBCardTableModRefBS.hpp"
83 #endif // INCLUDE_ALL_GCS
84
85 static jint CurrentVersion = JNI_VERSION_1_8;
86
87
88 // The DT_RETURN_MARK macros create a scoped object to fire the dtrace
89 // '-return' probe regardless of the return path is taken out of the function.
90 // Methods that have multiple return paths use this to avoid having to
91 // instrument each return path. Methods that use CHECK or THROW must use this
92 // since those macros can cause an immedate uninstrumented return.
93 //
94 // In order to get the return value, a reference to the variable containing
95 // the return value must be passed to the contructor of the object, and
96 // the return value must be set before return (since the mark object has
97 // a reference to it).
98 //
99 // Example:
100 // DT_RETURN_MARK_DECL(SomeFunc, int);
101 // JNI_ENTRY(int, SomeFunc, ...)
102 // int return_value = 0;
103 // DT_RETURN_MARK(SomeFunc, int, (const int&)return_value);
104 // foo(CHECK_0)
105 // return_value = 5;
106 // return return_value;
107 // JNI_END
108 #define DT_RETURN_MARK_DECL(name, type, probe) \
109 DTRACE_ONLY( \
110 class DTraceReturnProbeMark_##name { \
111 public: \
112 const type& _ret_ref; \
113 DTraceReturnProbeMark_##name(const type& v) : _ret_ref(v) {} \
114 ~DTraceReturnProbeMark_##name() { \
115 probe; \
116 } \
117 } \
118 )
119 // Void functions are simpler since there's no return value
120 #define DT_VOID_RETURN_MARK_DECL(name, probe) \
121 DTRACE_ONLY( \
122 class DTraceReturnProbeMark_##name { \
123 public: \
124 ~DTraceReturnProbeMark_##name() { \
125 probe; \
126 } \
127 } \
128 )
129
130 // Place these macros in the function to mark the return. Non-void
131 // functions need the type and address of the return value.
132 #define DT_RETURN_MARK(name, type, ref) \
133 DTRACE_ONLY( DTraceReturnProbeMark_##name dtrace_return_mark(ref) )
134 #define DT_VOID_RETURN_MARK(name) \
135 DTRACE_ONLY( DTraceReturnProbeMark_##name dtrace_return_mark )
136
137
138 // Use these to select distinct code for floating-point vs. non-floating point
139 // situations. Used from within common macros where we need slightly
140 // different behavior for Float/Double
141 #define FP_SELECT_Boolean(intcode, fpcode) intcode
142 #define FP_SELECT_Byte(intcode, fpcode) intcode
143 #define FP_SELECT_Char(intcode, fpcode) intcode
144 #define FP_SELECT_Short(intcode, fpcode) intcode
145 #define FP_SELECT_Object(intcode, fpcode) intcode
146 #define FP_SELECT_Int(intcode, fpcode) intcode
147 #define FP_SELECT_Long(intcode, fpcode) intcode
148 #define FP_SELECT_Float(intcode, fpcode) fpcode
149 #define FP_SELECT_Double(intcode, fpcode) fpcode
150 #define FP_SELECT(TypeName, intcode, fpcode) \
151 FP_SELECT_##TypeName(intcode, fpcode)
152
153 #define COMMA ,
154
155 // Choose DT_RETURN_MARK macros based on the type: float/double -> void
156 // (dtrace doesn't do FP yet)
157 #define DT_RETURN_MARK_DECL_FOR(TypeName, name, type, probe) \
158 FP_SELECT(TypeName, \
159 DT_RETURN_MARK_DECL(name, type, probe), DT_VOID_RETURN_MARK_DECL(name, probe) )
160 #define DT_RETURN_MARK_FOR(TypeName, name, type, ref) \
161 FP_SELECT(TypeName, \
162 DT_RETURN_MARK(name, type, ref), DT_VOID_RETURN_MARK(name) )
163
164
165 // out-of-line helpers for class jfieldIDWorkaround:
166
167 bool jfieldIDWorkaround::is_valid_jfieldID(Klass* k, jfieldID id) {
168 if (jfieldIDWorkaround::is_instance_jfieldID(k, id)) {
169 uintptr_t as_uint = (uintptr_t) id;
170 intptr_t offset = raw_instance_offset(id);
171 if (is_checked_jfieldID(id)) {
172 if (!klass_hash_ok(k, id)) {
173 return false;
174 }
175 }
176 return InstanceKlass::cast(k)->contains_field_offset(offset);
177 } else {
178 JNIid* result = (JNIid*) id;
179 #ifdef ASSERT
180 return result != NULL && result->is_static_field_id();
181 #else
182 return result != NULL;
183 #endif
184 }
185 }
186
187
188 intptr_t jfieldIDWorkaround::encode_klass_hash(Klass* k, intptr_t offset) {
189 if (offset <= small_offset_mask) {
190 Klass* field_klass = k;
191 Klass* super_klass = field_klass->super();
192 // With compressed oops the most super class with nonstatic fields would
193 // be the owner of fields embedded in the header.
194 while (InstanceKlass::cast(super_klass)->has_nonstatic_fields() &&
195 InstanceKlass::cast(super_klass)->contains_field_offset(offset)) {
196 field_klass = super_klass; // super contains the field also
197 super_klass = field_klass->super();
198 }
199 debug_only(No_Safepoint_Verifier nosafepoint;)
200 uintptr_t klass_hash = field_klass->identity_hash();
201 return ((klass_hash & klass_mask) << klass_shift) | checked_mask_in_place;
202 } else {
203 #if 0
204 #ifndef PRODUCT
205 {
206 ResourceMark rm;
207 warning("VerifyJNIFields: long offset %d in %s", offset, k->external_name());
208 }
209 #endif
210 #endif
211 return 0;
212 }
213 }
214
215 bool jfieldIDWorkaround::klass_hash_ok(Klass* k, jfieldID id) {
216 uintptr_t as_uint = (uintptr_t) id;
217 intptr_t klass_hash = (as_uint >> klass_shift) & klass_mask;
218 do {
219 debug_only(No_Safepoint_Verifier nosafepoint;)
220 // Could use a non-blocking query for identity_hash here...
221 if ((k->identity_hash() & klass_mask) == klass_hash)
222 return true;
223 k = k->super();
224 } while (k != NULL);
225 return false;
226 }
227
228 void jfieldIDWorkaround::verify_instance_jfieldID(Klass* k, jfieldID id) {
229 guarantee(jfieldIDWorkaround::is_instance_jfieldID(k, id), "must be an instance field" );
230 uintptr_t as_uint = (uintptr_t) id;
231 intptr_t offset = raw_instance_offset(id);
232 if (VerifyJNIFields) {
233 if (is_checked_jfieldID(id)) {
234 guarantee(klass_hash_ok(k, id),
235 "Bug in native code: jfieldID class must match object");
236 } else {
237 #if 0
238 #ifndef PRODUCT
239 if (Verbose) {
240 ResourceMark rm;
241 warning("VerifyJNIFields: unverified offset %d for %s", offset, k->external_name());
242 }
243 #endif
244 #endif
245 }
246 }
247 guarantee(InstanceKlass::cast(k)->contains_field_offset(offset),
248 "Bug in native code: jfieldID offset must address interior of object");
249 }
250
251 // Wrapper to trace JNI functions
252
253 #ifdef ASSERT
254 Histogram* JNIHistogram;
255 static volatile jint JNIHistogram_lock = 0;
256
257 class JNITraceWrapper : public StackObj {
258 public:
259 JNITraceWrapper(const char* format, ...) ATTRIBUTE_PRINTF(2, 3) {
260 if (TraceJNICalls) {
261 va_list ap;
262 va_start(ap, format);
263 tty->print("JNI ");
264 tty->vprint_cr(format, ap);
265 va_end(ap);
266 }
267 }
268 };
269
270 class JNIHistogramElement : public HistogramElement {
271 public:
272 JNIHistogramElement(const char* name);
273 };
274
275 JNIHistogramElement::JNIHistogramElement(const char* elementName) {
276 _name = elementName;
277 uintx count = 0;
278
279 while (Atomic::cmpxchg(1, &JNIHistogram_lock, 0) != 0) {
280 while (OrderAccess::load_acquire(&JNIHistogram_lock) != 0) {
281 count +=1;
282 if ( (WarnOnStalledSpinLock > 0)
283 && (count % WarnOnStalledSpinLock == 0)) {
284 warning("JNIHistogram_lock seems to be stalled");
285 }
286 }
287 }
288
289
290 if(JNIHistogram == NULL)
291 JNIHistogram = new Histogram("JNI Call Counts",100);
292
293 JNIHistogram->add_element(this);
294 Atomic::dec(&JNIHistogram_lock);
295 }
296
297 #define JNICountWrapper(arg) \
298 static JNIHistogramElement* e = new JNIHistogramElement(arg); \
299 /* There is a MT-race condition in VC++. So we need to make sure that that e has been initialized */ \
300 if (e != NULL) e->increment_count()
301 #define JNIWrapper(arg) JNICountWrapper(arg); JNITraceWrapper(arg)
302 #else
303 #define JNIWrapper(arg)
304 #endif
305
306
307 // Implementation of JNI entries
308
309 DT_RETURN_MARK_DECL(DefineClass, jclass
310 , HOTSPOT_JNI_DEFINECLASS_RETURN(_ret_ref));
311
312 JNI_ENTRY(jclass, jni_DefineClass(JNIEnv *env, const char *name, jobject loaderRef,
313 const jbyte *buf, jsize bufLen))
314 JNIWrapper("DefineClass");
315
316 HOTSPOT_JNI_DEFINECLASS_ENTRY(
317 env, (char*) name, loaderRef, (char*) buf, bufLen);
318
319 jclass cls = NULL;
320 DT_RETURN_MARK(DefineClass, jclass, (const jclass&)cls);
321
322 TempNewSymbol class_name = NULL;
323 // Since exceptions can be thrown, class initialization can take place
324 // if name is NULL no check for class name in .class stream has to be made.
325 if (name != NULL) {
326 const int str_len = (int)strlen(name);
327 if (str_len > Symbol::max_length()) {
328 // It's impossible to create this class; the name cannot fit
329 // into the constant pool.
330 THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), name);
331 }
332 class_name = SymbolTable::new_symbol(name, CHECK_NULL);
333 }
334 ResourceMark rm(THREAD);
335 ClassFileStream st((u1*) buf, bufLen, NULL);
336 Handle class_loader (THREAD, JNIHandles::resolve(loaderRef));
337
338 if (UsePerfData && !class_loader.is_null()) {
339 // check whether the current caller thread holds the lock or not.
340 // If not, increment the corresponding counter
341 if (ObjectSynchronizer::
342 query_lock_ownership((JavaThread*)THREAD, class_loader) !=
343 ObjectSynchronizer::owner_self) {
344 ClassLoader::sync_JNIDefineClassLockFreeCounter()->inc();
345 }
346 }
347 Klass* k = SystemDictionary::resolve_from_stream(class_name, class_loader,
348 Handle(), &st, true,
349 CHECK_NULL);
350
351 if (TraceClassResolution && k != NULL) {
352 trace_class_resolution(k);
353 }
354
355 cls = (jclass)JNIHandles::make_local(
356 env, k->java_mirror());
357 return cls;
358 JNI_END
359
360
361
362 static bool first_time_FindClass = true;
363
364 DT_RETURN_MARK_DECL(FindClass, jclass
365 , HOTSPOT_JNI_FINDCLASS_RETURN(_ret_ref));
366
367 JNI_ENTRY(jclass, jni_FindClass(JNIEnv *env, const char *name))
368 JNIWrapper("FindClass");
369
370 HOTSPOT_JNI_FINDCLASS_ENTRY(env, (char *)name);
371
372 jclass result = NULL;
373 DT_RETURN_MARK(FindClass, jclass, (const jclass&)result);
374
375 // Remember if we are the first invocation of jni_FindClass
376 bool first_time = first_time_FindClass;
377 first_time_FindClass = false;
378
379 // Sanity check the name: it cannot be null or larger than the maximum size
380 // name we can fit in the constant pool.
381 if (name == NULL || (int)strlen(name) > Symbol::max_length()) {
382 THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), name);
383 }
384
385 //%note jni_3
386 Handle loader;
387 Handle protection_domain;
388 // Find calling class
389 instanceKlassHandle k (THREAD, thread->security_get_caller_class(0));
390 if (k.not_null()) {
391 loader = Handle(THREAD, k->class_loader());
392 // Special handling to make sure JNI_OnLoad and JNI_OnUnload are executed
393 // in the correct class context.
394 if (loader.is_null() &&
395 k->name() == vmSymbols::java_lang_ClassLoader_NativeLibrary()) {
396 JavaValue result(T_OBJECT);
397 JavaCalls::call_static(&result, k,
398 vmSymbols::getFromClass_name(),
399 vmSymbols::void_class_signature(),
400 thread);
401 if (HAS_PENDING_EXCEPTION) {
402 Handle ex(thread, thread->pending_exception());
403 CLEAR_PENDING_EXCEPTION;
404 THROW_HANDLE_0(ex);
405 }
406 oop mirror = (oop) result.get_jobject();
407 loader = Handle(THREAD,
408 InstanceKlass::cast(java_lang_Class::as_Klass(mirror))->class_loader());
409 protection_domain = Handle(THREAD,
410 InstanceKlass::cast(java_lang_Class::as_Klass(mirror))->protection_domain());
411 }
412 } else {
413 // We call ClassLoader.getSystemClassLoader to obtain the system class loader.
414 loader = Handle(THREAD, SystemDictionary::java_system_loader());
415 }
416
417 TempNewSymbol sym = SymbolTable::new_symbol(name, CHECK_NULL);
418 result = find_class_from_class_loader(env, sym, true, loader,
419 protection_domain, true, thread);
420
421 if (TraceClassResolution && result != NULL) {
422 trace_class_resolution(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(result)));
423 }
424
425 // If we were the first invocation of jni_FindClass, we enable compilation again
426 // rather than just allowing invocation counter to overflow and decay.
427 // Controlled by flag DelayCompilationDuringStartup.
428 if (first_time && !CompileTheWorld)
429 CompilationPolicy::completed_vm_startup();
430
431 return result;
432 JNI_END
433
434 DT_RETURN_MARK_DECL(FromReflectedMethod, jmethodID
435 , HOTSPOT_JNI_FROMREFLECTEDMETHOD_RETURN((uintptr_t)_ret_ref));
436
437 JNI_ENTRY(jmethodID, jni_FromReflectedMethod(JNIEnv *env, jobject method))
438 JNIWrapper("FromReflectedMethod");
439
440 HOTSPOT_JNI_FROMREFLECTEDMETHOD_ENTRY(env, method);
441
442 jmethodID ret = NULL;
443 DT_RETURN_MARK(FromReflectedMethod, jmethodID, (const jmethodID&)ret);
444
445 // method is a handle to a java.lang.reflect.Method object
446 oop reflected = JNIHandles::resolve_non_null(method);
447 oop mirror = NULL;
448 int slot = 0;
449
450 if (reflected->klass() == SystemDictionary::reflect_Constructor_klass()) {
451 mirror = java_lang_reflect_Constructor::clazz(reflected);
452 slot = java_lang_reflect_Constructor::slot(reflected);
453 } else {
454 assert(reflected->klass() == SystemDictionary::reflect_Method_klass(), "wrong type");
455 mirror = java_lang_reflect_Method::clazz(reflected);
456 slot = java_lang_reflect_Method::slot(reflected);
457 }
458 Klass* k = java_lang_Class::as_Klass(mirror);
459
460 KlassHandle k1(THREAD, k);
461 // Make sure class is initialized before handing id's out to methods
462 k1()->initialize(CHECK_NULL);
463 Method* m = InstanceKlass::cast(k1())->method_with_idnum(slot);
464 ret = m==NULL? NULL : m->jmethod_id(); // return NULL if reflected method deleted
465 return ret;
466 JNI_END
467
468 DT_RETURN_MARK_DECL(FromReflectedField, jfieldID
469 , HOTSPOT_JNI_FROMREFLECTEDFIELD_RETURN((uintptr_t)_ret_ref));
470
471 JNI_ENTRY(jfieldID, jni_FromReflectedField(JNIEnv *env, jobject field))
472 JNIWrapper("FromReflectedField");
473
474 HOTSPOT_JNI_FROMREFLECTEDFIELD_ENTRY(env, field);
475
476 jfieldID ret = NULL;
477 DT_RETURN_MARK(FromReflectedField, jfieldID, (const jfieldID&)ret);
478
479 // field is a handle to a java.lang.reflect.Field object
480 oop reflected = JNIHandles::resolve_non_null(field);
481 oop mirror = java_lang_reflect_Field::clazz(reflected);
482 Klass* k = java_lang_Class::as_Klass(mirror);
483 int slot = java_lang_reflect_Field::slot(reflected);
484 int modifiers = java_lang_reflect_Field::modifiers(reflected);
485
486 KlassHandle k1(THREAD, k);
487 // Make sure class is initialized before handing id's out to fields
488 k1()->initialize(CHECK_NULL);
489
490 // First check if this is a static field
491 if (modifiers & JVM_ACC_STATIC) {
492 intptr_t offset = InstanceKlass::cast(k1())->field_offset( slot );
493 JNIid* id = InstanceKlass::cast(k1())->jni_id_for(offset);
494 assert(id != NULL, "corrupt Field object");
495 debug_only(id->set_is_static_field_id();)
496 // A jfieldID for a static field is a JNIid specifying the field holder and the offset within the Klass*
497 ret = jfieldIDWorkaround::to_static_jfieldID(id);
498 return ret;
499 }
500
501 // The slot is the index of the field description in the field-array
502 // The jfieldID is the offset of the field within the object
503 // It may also have hash bits for k, if VerifyJNIFields is turned on.
504 intptr_t offset = InstanceKlass::cast(k1())->field_offset( slot );
505 assert(InstanceKlass::cast(k1())->contains_field_offset(offset), "stay within object");
506 ret = jfieldIDWorkaround::to_instance_jfieldID(k1(), offset);
507 return ret;
508 JNI_END
509
510
511 DT_RETURN_MARK_DECL(ToReflectedMethod, jobject
512 , HOTSPOT_JNI_TOREFLECTEDMETHOD_RETURN(_ret_ref));
513
514 JNI_ENTRY(jobject, jni_ToReflectedMethod(JNIEnv *env, jclass cls, jmethodID method_id, jboolean isStatic))
515 JNIWrapper("ToReflectedMethod");
516
517 HOTSPOT_JNI_TOREFLECTEDMETHOD_ENTRY(env, cls, (uintptr_t) method_id, isStatic);
518
519 jobject ret = NULL;
520 DT_RETURN_MARK(ToReflectedMethod, jobject, (const jobject&)ret);
521
522 methodHandle m (THREAD, Method::resolve_jmethod_id(method_id));
523 assert(m->is_static() == (isStatic != 0), "jni_ToReflectedMethod access flags doesn't match");
524 oop reflection_method;
525 if (m->is_initializer()) {
526 reflection_method = Reflection::new_constructor(m, CHECK_NULL);
527 } else {
528 reflection_method = Reflection::new_method(m, false, CHECK_NULL);
529 }
530 ret = JNIHandles::make_local(env, reflection_method);
531 return ret;
532 JNI_END
533
534 DT_RETURN_MARK_DECL(GetSuperclass, jclass
535 , HOTSPOT_JNI_GETSUPERCLASS_RETURN(_ret_ref));
536
537 JNI_ENTRY(jclass, jni_GetSuperclass(JNIEnv *env, jclass sub))
538 JNIWrapper("GetSuperclass");
539
540 HOTSPOT_JNI_GETSUPERCLASS_ENTRY(env, sub);
541
542 jclass obj = NULL;
543 DT_RETURN_MARK(GetSuperclass, jclass, (const jclass&)obj);
544
545 oop mirror = JNIHandles::resolve_non_null(sub);
546 // primitive classes return NULL
547 if (java_lang_Class::is_primitive(mirror)) return NULL;
548
549 // Rules of Class.getSuperClass as implemented by KLass::java_super:
550 // arrays return Object
551 // interfaces return NULL
552 // proper classes return Klass::super()
553 Klass* k = java_lang_Class::as_Klass(mirror);
554 if (k->is_interface()) return NULL;
555
556 // return mirror for superclass
557 Klass* super = k->java_super();
558 // super2 is the value computed by the compiler's getSuperClass intrinsic:
559 debug_only(Klass* super2 = ( k->oop_is_array()
560 ? SystemDictionary::Object_klass()
561 : k->super() ) );
562 assert(super == super2,
563 "java_super computation depends on interface, array, other super");
564 obj = (super == NULL) ? NULL : (jclass) JNIHandles::make_local(super->java_mirror());
565 return obj;
566 JNI_END
567
568 JNI_QUICK_ENTRY(jboolean, jni_IsAssignableFrom(JNIEnv *env, jclass sub, jclass super))
569 JNIWrapper("IsSubclassOf");
570
571 HOTSPOT_JNI_ISASSIGNABLEFROM_ENTRY(env, sub, super);
572
573 oop sub_mirror = JNIHandles::resolve_non_null(sub);
574 oop super_mirror = JNIHandles::resolve_non_null(super);
575 if (java_lang_Class::is_primitive(sub_mirror) ||
576 java_lang_Class::is_primitive(super_mirror)) {
577 jboolean ret = (sub_mirror == super_mirror);
578
579 HOTSPOT_JNI_ISASSIGNABLEFROM_RETURN(ret);
580 return ret;
581 }
582 Klass* sub_klass = java_lang_Class::as_Klass(sub_mirror);
583 Klass* super_klass = java_lang_Class::as_Klass(super_mirror);
584 assert(sub_klass != NULL && super_klass != NULL, "invalid arguments to jni_IsAssignableFrom");
585 jboolean ret = sub_klass->is_subtype_of(super_klass) ?
586 JNI_TRUE : JNI_FALSE;
587
588 HOTSPOT_JNI_ISASSIGNABLEFROM_RETURN(ret);
589 return ret;
590 JNI_END
591
592
593 DT_RETURN_MARK_DECL(Throw, jint
594 , HOTSPOT_JNI_THROW_RETURN(_ret_ref));
595
596 JNI_ENTRY(jint, jni_Throw(JNIEnv *env, jthrowable obj))
597 JNIWrapper("Throw");
598
599 HOTSPOT_JNI_THROW_ENTRY(env, obj);
600
601 jint ret = JNI_OK;
602 DT_RETURN_MARK(Throw, jint, (const jint&)ret);
603
604 THROW_OOP_(JNIHandles::resolve(obj), JNI_OK);
605 ShouldNotReachHere();
606 return 0; // Mute compiler.
607 JNI_END
608
609
610 DT_RETURN_MARK_DECL(ThrowNew, jint
611 , HOTSPOT_JNI_THROWNEW_RETURN(_ret_ref));
612
613 JNI_ENTRY(jint, jni_ThrowNew(JNIEnv *env, jclass clazz, const char *message))
614 JNIWrapper("ThrowNew");
615
616 HOTSPOT_JNI_THROWNEW_ENTRY(env, clazz, (char *) message);
617
618 jint ret = JNI_OK;
619 DT_RETURN_MARK(ThrowNew, jint, (const jint&)ret);
620
621 InstanceKlass* k = InstanceKlass::cast(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz)));
622 Symbol* name = k->name();
623 Handle class_loader (THREAD, k->class_loader());
624 Handle protection_domain (THREAD, k->protection_domain());
625 THROW_MSG_LOADER_(name, (char *)message, class_loader, protection_domain, JNI_OK);
626 ShouldNotReachHere();
627 return 0; // Mute compiler.
628 JNI_END
629
630
631 // JNI functions only transform a pending async exception to a synchronous
632 // exception in ExceptionOccurred and ExceptionCheck calls, since
633 // delivering an async exception in other places won't change the native
634 // code's control flow and would be harmful when native code further calls
635 // JNI functions with a pending exception. Async exception is also checked
636 // during the call, so ExceptionOccurred/ExceptionCheck won't return
637 // false but deliver the async exception at the very end during
638 // state transition.
639
640 static void jni_check_async_exceptions(JavaThread *thread) {
641 assert(thread == Thread::current(), "must be itself");
642 thread->check_and_handle_async_exceptions();
643 }
644
645 JNI_ENTRY_NO_PRESERVE(jthrowable, jni_ExceptionOccurred(JNIEnv *env))
646 JNIWrapper("ExceptionOccurred");
647
648 HOTSPOT_JNI_EXCEPTIONOCCURRED_ENTRY(env);
649
650 jni_check_async_exceptions(thread);
651 oop exception = thread->pending_exception();
652 jthrowable ret = (jthrowable) JNIHandles::make_local(env, exception);
653
654 HOTSPOT_JNI_EXCEPTIONOCCURRED_RETURN(ret);
655 return ret;
656 JNI_END
657
658
659 JNI_ENTRY_NO_PRESERVE(void, jni_ExceptionDescribe(JNIEnv *env))
660 JNIWrapper("ExceptionDescribe");
661
662 HOTSPOT_JNI_EXCEPTIONDESCRIBE_ENTRY(env);
663
664 if (thread->has_pending_exception()) {
665 Handle ex(thread, thread->pending_exception());
666 thread->clear_pending_exception();
667 if (ex->is_a(SystemDictionary::ThreadDeath_klass())) {
668 // Don't print anything if we are being killed.
669 } else {
670 jio_fprintf(defaultStream::error_stream(), "Exception ");
671 if (thread != NULL && thread->threadObj() != NULL) {
672 ResourceMark rm(THREAD);
673 jio_fprintf(defaultStream::error_stream(),
674 "in thread \"%s\" ", thread->get_thread_name());
675 }
676 if (ex->is_a(SystemDictionary::Throwable_klass())) {
677 JavaValue result(T_VOID);
678 JavaCalls::call_virtual(&result,
679 ex,
680 KlassHandle(THREAD,
681 SystemDictionary::Throwable_klass()),
682 vmSymbols::printStackTrace_name(),
683 vmSymbols::void_method_signature(),
684 THREAD);
685 // If an exception is thrown in the call it gets thrown away. Not much
686 // we can do with it. The native code that calls this, does not check
687 // for the exception - hence, it might still be in the thread when DestroyVM gets
688 // called, potentially causing a few asserts to trigger - since no pending exception
689 // is expected.
690 CLEAR_PENDING_EXCEPTION;
691 } else {
692 ResourceMark rm(THREAD);
693 jio_fprintf(defaultStream::error_stream(),
694 ". Uncaught exception of type %s.",
695 ex->klass()->external_name());
696 }
697 }
698 }
699
700 HOTSPOT_JNI_EXCEPTIONDESCRIBE_RETURN();
701 JNI_END
702
703
704 JNI_QUICK_ENTRY(void, jni_ExceptionClear(JNIEnv *env))
705 JNIWrapper("ExceptionClear");
706
707 HOTSPOT_JNI_EXCEPTIONCLEAR_ENTRY(env);
708
709 // The jni code might be using this API to clear java thrown exception.
710 // So just mark jvmti thread exception state as exception caught.
711 JvmtiThreadState *state = JavaThread::current()->jvmti_thread_state();
712 if (state != NULL && state->is_exception_detected()) {
713 state->set_exception_caught();
714 }
715 thread->clear_pending_exception();
716
717 HOTSPOT_JNI_EXCEPTIONCLEAR_RETURN();
718 JNI_END
719
720
721 JNI_ENTRY(void, jni_FatalError(JNIEnv *env, const char *msg))
722 JNIWrapper("FatalError");
723
724 HOTSPOT_JNI_FATALERROR_ENTRY(env, (char *) msg);
725
726 tty->print_cr("FATAL ERROR in native method: %s", msg);
727 thread->print_stack();
728 os::abort(); // Dump core and abort
729 JNI_END
730
731
732 JNI_ENTRY(jint, jni_PushLocalFrame(JNIEnv *env, jint capacity))
733 JNIWrapper("PushLocalFrame");
734
735 HOTSPOT_JNI_PUSHLOCALFRAME_ENTRY(env, capacity);
736
737 //%note jni_11
738 if (capacity < 0 ||
739 ((MaxJNILocalCapacity > 0) && (capacity > MaxJNILocalCapacity))) {
740 HOTSPOT_JNI_PUSHLOCALFRAME_RETURN((uint32_t)JNI_ERR);
741 return JNI_ERR;
742 }
743 JNIHandleBlock* old_handles = thread->active_handles();
744 JNIHandleBlock* new_handles = JNIHandleBlock::allocate_block(thread);
745 assert(new_handles != NULL, "should not be NULL");
746 new_handles->set_pop_frame_link(old_handles);
747 thread->set_active_handles(new_handles);
748 jint ret = JNI_OK;
749 HOTSPOT_JNI_PUSHLOCALFRAME_RETURN(ret);
750 return ret;
751 JNI_END
752
753
754 JNI_ENTRY(jobject, jni_PopLocalFrame(JNIEnv *env, jobject result))
755 JNIWrapper("PopLocalFrame");
756
757 HOTSPOT_JNI_POPLOCALFRAME_ENTRY(env, result);
758
759 //%note jni_11
760 Handle result_handle(thread, JNIHandles::resolve(result));
761 JNIHandleBlock* old_handles = thread->active_handles();
762 JNIHandleBlock* new_handles = old_handles->pop_frame_link();
763 if (new_handles != NULL) {
764 // As a sanity check we only release the handle blocks if the pop_frame_link is not NULL.
765 // This way code will still work if PopLocalFrame is called without a corresponding
766 // PushLocalFrame call. Note that we set the pop_frame_link to NULL explicitly, otherwise
767 // the release_block call will release the blocks.
768 thread->set_active_handles(new_handles);
769 old_handles->set_pop_frame_link(NULL); // clear link we won't release new_handles below
770 JNIHandleBlock::release_block(old_handles, thread); // may block
771 result = JNIHandles::make_local(thread, result_handle());
772 }
773 HOTSPOT_JNI_POPLOCALFRAME_RETURN(result);
774 return result;
775 JNI_END
776
777
778 JNI_ENTRY(jobject, jni_NewGlobalRef(JNIEnv *env, jobject ref))
779 JNIWrapper("NewGlobalRef");
780
781 HOTSPOT_JNI_NEWGLOBALREF_ENTRY(env, ref);
782
783 Handle ref_handle(thread, JNIHandles::resolve(ref));
784 jobject ret = JNIHandles::make_global(ref_handle);
785
786 HOTSPOT_JNI_NEWGLOBALREF_RETURN(ret);
787 return ret;
788 JNI_END
789
790 // Must be JNI_ENTRY (with HandleMark)
791 JNI_ENTRY_NO_PRESERVE(void, jni_DeleteGlobalRef(JNIEnv *env, jobject ref))
792 JNIWrapper("DeleteGlobalRef");
793
794 HOTSPOT_JNI_DELETEGLOBALREF_ENTRY(env, ref);
795
796 JNIHandles::destroy_global(ref);
797
798 HOTSPOT_JNI_DELETEGLOBALREF_RETURN();
799 JNI_END
800
801 JNI_QUICK_ENTRY(void, jni_DeleteLocalRef(JNIEnv *env, jobject obj))
802 JNIWrapper("DeleteLocalRef");
803
804 HOTSPOT_JNI_DELETELOCALREF_ENTRY(env, obj);
805
806 JNIHandles::destroy_local(obj);
807
808 HOTSPOT_JNI_DELETELOCALREF_RETURN();
809 JNI_END
810
811 JNI_QUICK_ENTRY(jboolean, jni_IsSameObject(JNIEnv *env, jobject r1, jobject r2))
812 JNIWrapper("IsSameObject");
813
814 HOTSPOT_JNI_ISSAMEOBJECT_ENTRY(env, r1, r2);
815
816 oop a = JNIHandles::resolve(r1);
817 oop b = JNIHandles::resolve(r2);
818 jboolean ret = (a == b) ? JNI_TRUE : JNI_FALSE;
819
820 HOTSPOT_JNI_ISSAMEOBJECT_RETURN(ret);
821 return ret;
822 JNI_END
823
824
825 JNI_ENTRY(jobject, jni_NewLocalRef(JNIEnv *env, jobject ref))
826 JNIWrapper("NewLocalRef");
827
828 HOTSPOT_JNI_NEWLOCALREF_ENTRY(env, ref);
829
830 jobject ret = JNIHandles::make_local(env, JNIHandles::resolve(ref));
831
832 HOTSPOT_JNI_NEWLOCALREF_RETURN(ret);
833 return ret;
834 JNI_END
835
836 JNI_LEAF(jint, jni_EnsureLocalCapacity(JNIEnv *env, jint capacity))
837 JNIWrapper("EnsureLocalCapacity");
838
839 HOTSPOT_JNI_ENSURELOCALCAPACITY_ENTRY(env, capacity);
840
841 jint ret;
842 if (capacity >= 0 &&
843 ((MaxJNILocalCapacity <= 0) || (capacity <= MaxJNILocalCapacity))) {
844 ret = JNI_OK;
845 } else {
846 ret = JNI_ERR;
847 }
848
849 HOTSPOT_JNI_ENSURELOCALCAPACITY_RETURN(ret);
850 return ret;
851 JNI_END
852
853 // Return the Handle Type
854 JNI_LEAF(jobjectRefType, jni_GetObjectRefType(JNIEnv *env, jobject obj))
855 JNIWrapper("GetObjectRefType");
856
857 HOTSPOT_JNI_GETOBJECTREFTYPE_ENTRY(env, obj);
858
859 jobjectRefType ret;
860 if (JNIHandles::is_local_handle(thread, obj) ||
861 JNIHandles::is_frame_handle(thread, obj))
862 ret = JNILocalRefType;
863 else if (JNIHandles::is_global_handle(obj))
864 ret = JNIGlobalRefType;
865 else if (JNIHandles::is_weak_global_handle(obj))
866 ret = JNIWeakGlobalRefType;
867 else
868 ret = JNIInvalidRefType;
869
870 HOTSPOT_JNI_GETOBJECTREFTYPE_RETURN((void *) ret);
871 return ret;
872 JNI_END
873
874
875 class JNI_ArgumentPusher : public SignatureIterator {
876 protected:
877 JavaCallArguments* _arguments;
878
879 virtual void get_bool () = 0;
880 virtual void get_char () = 0;
881 virtual void get_short () = 0;
882 virtual void get_byte () = 0;
883 virtual void get_int () = 0;
884 virtual void get_long () = 0;
885 virtual void get_float () = 0;
886 virtual void get_double () = 0;
887 virtual void get_object () = 0;
888
889 JNI_ArgumentPusher(Symbol* signature) : SignatureIterator(signature) {
890 this->_return_type = T_ILLEGAL;
891 _arguments = NULL;
892 }
893
894 public:
895 virtual void iterate( uint64_t fingerprint ) = 0;
896
897 void set_java_argument_object(JavaCallArguments *arguments) { _arguments = arguments; }
898
899 inline void do_bool() { if (!is_return_type()) get_bool(); }
900 inline void do_char() { if (!is_return_type()) get_char(); }
901 inline void do_short() { if (!is_return_type()) get_short(); }
902 inline void do_byte() { if (!is_return_type()) get_byte(); }
903 inline void do_int() { if (!is_return_type()) get_int(); }
904 inline void do_long() { if (!is_return_type()) get_long(); }
905 inline void do_float() { if (!is_return_type()) get_float(); }
906 inline void do_double() { if (!is_return_type()) get_double(); }
907 inline void do_object(int begin, int end) { if (!is_return_type()) get_object(); }
908 inline void do_array(int begin, int end) { if (!is_return_type()) get_object(); } // do_array uses get_object -- there is no get_array
909 inline void do_void() { }
910
911 JavaCallArguments* arguments() { return _arguments; }
912 void push_receiver(Handle h) { _arguments->push_oop(h); }
913 };
914
915
916 class JNI_ArgumentPusherVaArg : public JNI_ArgumentPusher {
917 protected:
918 va_list _ap;
919
920 inline void get_bool() { _arguments->push_int(va_arg(_ap, jint)); } // bool is coerced to int when using va_arg
921 inline void get_char() { _arguments->push_int(va_arg(_ap, jint)); } // char is coerced to int when using va_arg
922 inline void get_short() { _arguments->push_int(va_arg(_ap, jint)); } // short is coerced to int when using va_arg
923 inline void get_byte() { _arguments->push_int(va_arg(_ap, jint)); } // byte is coerced to int when using va_arg
924 inline void get_int() { _arguments->push_int(va_arg(_ap, jint)); }
925
926 // each of these paths is exercized by the various jck Call[Static,Nonvirtual,][Void,Int,..]Method[A,V,] tests
927
928 inline void get_long() { _arguments->push_long(va_arg(_ap, jlong)); }
929 inline void get_float() { _arguments->push_float((jfloat)va_arg(_ap, jdouble)); } // float is coerced to double w/ va_arg
930 inline void get_double() { _arguments->push_double(va_arg(_ap, jdouble)); }
931 inline void get_object() { jobject l = va_arg(_ap, jobject);
932 _arguments->push_oop(Handle((oop *)l, false)); }
933
934 inline void set_ap(va_list rap) {
935 #ifdef va_copy
936 va_copy(_ap, rap);
937 #elif defined (__va_copy)
938 __va_copy(_ap, rap);
939 #else
940 _ap = rap;
941 #endif
942 }
943
944 public:
945 JNI_ArgumentPusherVaArg(Symbol* signature, va_list rap)
946 : JNI_ArgumentPusher(signature) {
947 set_ap(rap);
948 }
949 JNI_ArgumentPusherVaArg(jmethodID method_id, va_list rap)
950 : JNI_ArgumentPusher(Method::resolve_jmethod_id(method_id)->signature()) {
951 set_ap(rap);
952 }
953
954 // Optimized path if we have the bitvector form of signature
955 void iterate( uint64_t fingerprint ) {
956 if (fingerprint == (uint64_t)CONST64(-1)) {
957 SignatureIterator::iterate(); // Must be too many arguments
958 } else {
959 _return_type = (BasicType)((fingerprint >> static_feature_size) &
960 result_feature_mask);
961
962 assert(fingerprint, "Fingerprint should not be 0");
963 fingerprint = fingerprint >> (static_feature_size + result_feature_size);
964 while ( 1 ) {
965 switch ( fingerprint & parameter_feature_mask ) {
966 case bool_parm:
967 case char_parm:
968 case short_parm:
969 case byte_parm:
970 case int_parm:
971 get_int();
972 break;
973 case obj_parm:
974 get_object();
975 break;
976 case long_parm:
977 get_long();
978 break;
979 case float_parm:
980 get_float();
981 break;
982 case double_parm:
983 get_double();
984 break;
985 case done_parm:
986 return;
987 break;
988 default:
989 ShouldNotReachHere();
990 break;
991 }
992 fingerprint >>= parameter_feature_size;
993 }
994 }
995 }
996 };
997
998
999 class JNI_ArgumentPusherArray : public JNI_ArgumentPusher {
1000 protected:
1001 const jvalue *_ap;
1002
1003 inline void get_bool() { _arguments->push_int((jint)(_ap++)->z); }
1004 inline void get_char() { _arguments->push_int((jint)(_ap++)->c); }
1005 inline void get_short() { _arguments->push_int((jint)(_ap++)->s); }
1006 inline void get_byte() { _arguments->push_int((jint)(_ap++)->b); }
1007 inline void get_int() { _arguments->push_int((jint)(_ap++)->i); }
1008
1009 inline void get_long() { _arguments->push_long((_ap++)->j); }
1010 inline void get_float() { _arguments->push_float((_ap++)->f); }
1011 inline void get_double() { _arguments->push_double((_ap++)->d);}
1012 inline void get_object() { _arguments->push_oop(Handle((oop *)(_ap++)->l, false)); }
1013
1014 inline void set_ap(const jvalue *rap) { _ap = rap; }
1015
1016 public:
1017 JNI_ArgumentPusherArray(Symbol* signature, const jvalue *rap)
1018 : JNI_ArgumentPusher(signature) {
1019 set_ap(rap);
1020 }
1021 JNI_ArgumentPusherArray(jmethodID method_id, const jvalue *rap)
1022 : JNI_ArgumentPusher(Method::resolve_jmethod_id(method_id)->signature()) {
1023 set_ap(rap);
1024 }
1025
1026 // Optimized path if we have the bitvector form of signature
1027 void iterate( uint64_t fingerprint ) {
1028 if (fingerprint == (uint64_t)CONST64(-1)) {
1029 SignatureIterator::iterate(); // Must be too many arguments
1030 } else {
1031 _return_type = (BasicType)((fingerprint >> static_feature_size) &
1032 result_feature_mask);
1033 assert(fingerprint, "Fingerprint should not be 0");
1034 fingerprint = fingerprint >> (static_feature_size + result_feature_size);
1035 while ( 1 ) {
1036 switch ( fingerprint & parameter_feature_mask ) {
1037 case bool_parm:
1038 get_bool();
1039 break;
1040 case char_parm:
1041 get_char();
1042 break;
1043 case short_parm:
1044 get_short();
1045 break;
1046 case byte_parm:
1047 get_byte();
1048 break;
1049 case int_parm:
1050 get_int();
1051 break;
1052 case obj_parm:
1053 get_object();
1054 break;
1055 case long_parm:
1056 get_long();
1057 break;
1058 case float_parm:
1059 get_float();
1060 break;
1061 case double_parm:
1062 get_double();
1063 break;
1064 case done_parm:
1065 return;
1066 break;
1067 default:
1068 ShouldNotReachHere();
1069 break;
1070 }
1071 fingerprint >>= parameter_feature_size;
1072 }
1073 }
1074 }
1075 };
1076
1077
1078 enum JNICallType {
1079 JNI_STATIC,
1080 JNI_VIRTUAL,
1081 JNI_NONVIRTUAL
1082 };
1083
1084
1085
1086 static void jni_invoke_static(JNIEnv *env, JavaValue* result, jobject receiver, JNICallType call_type, jmethodID method_id, JNI_ArgumentPusher *args, TRAPS) {
1087 methodHandle method(THREAD, Method::resolve_jmethod_id(method_id));
1088
1089 // Create object to hold arguments for the JavaCall, and associate it with
1090 // the jni parser
1091 ResourceMark rm(THREAD);
1092 int number_of_parameters = method->size_of_parameters();
1093 JavaCallArguments java_args(number_of_parameters);
1094 args->set_java_argument_object(&java_args);
1095
1096 assert(method->is_static(), "method should be static");
1097
1098 // Fill out JavaCallArguments object
1099 args->iterate( Fingerprinter(method).fingerprint() );
1100 // Initialize result type
1101 result->set_type(args->get_ret_type());
1102
1103 // Invoke the method. Result is returned as oop.
1104 JavaCalls::call(result, method, &java_args, CHECK);
1105
1106 // Convert result
1107 if (result->get_type() == T_OBJECT || result->get_type() == T_ARRAY) {
1108 result->set_jobject(JNIHandles::make_local(env, (oop) result->get_jobject()));
1109 }
1110 }
1111
1112
1113 static void jni_invoke_nonstatic(JNIEnv *env, JavaValue* result, jobject receiver, JNICallType call_type, jmethodID method_id, JNI_ArgumentPusher *args, TRAPS) {
1114 oop recv = JNIHandles::resolve(receiver);
1115 if (recv == NULL) {
1116 THROW(vmSymbols::java_lang_NullPointerException());
1117 }
1118 Handle h_recv(THREAD, recv);
1119
1120 int number_of_parameters;
1121 Method* selected_method;
1122 {
1123 Method* m = Method::resolve_jmethod_id(method_id);
1124 number_of_parameters = m->size_of_parameters();
1125 Klass* holder = m->method_holder();
1126 if (!(holder)->is_interface()) {
1127 // non-interface call -- for that little speed boost, don't handlize
1128 debug_only(No_Safepoint_Verifier nosafepoint;)
1129 if (call_type == JNI_VIRTUAL) {
1130 // jni_GetMethodID makes sure class is linked and initialized
1131 // so m should have a valid vtable index.
1132 assert(!m->has_itable_index(), "");
1133 int vtbl_index = m->vtable_index();
1134 if (vtbl_index != Method::nonvirtual_vtable_index) {
1135 Klass* k = h_recv->klass();
1136 // k might be an arrayKlassOop but all vtables start at
1137 // the same place. The cast is to avoid virtual call and assertion.
1138 InstanceKlass *ik = (InstanceKlass*)k;
1139 selected_method = ik->method_at_vtable(vtbl_index);
1140 } else {
1141 // final method
1142 selected_method = m;
1143 }
1144 } else {
1145 // JNI_NONVIRTUAL call
1146 selected_method = m;
1147 }
1148 } else {
1149 // interface call
1150 KlassHandle h_holder(THREAD, holder);
1151
1152 if (call_type == JNI_VIRTUAL) {
1153 int itbl_index = m->itable_index();
1154 Klass* k = h_recv->klass();
1155 selected_method = InstanceKlass::cast(k)->method_at_itable(h_holder(), itbl_index, CHECK);
1156 } else {
1157 selected_method = m;
1158 }
1159 }
1160 }
1161
1162 methodHandle method(THREAD, selected_method);
1163
1164 // Create object to hold arguments for the JavaCall, and associate it with
1165 // the jni parser
1166 ResourceMark rm(THREAD);
1167 JavaCallArguments java_args(number_of_parameters);
1168 args->set_java_argument_object(&java_args);
1169
1170 // handle arguments
1171 assert(!method->is_static(), "method should not be static");
1172 args->push_receiver(h_recv); // Push jobject handle
1173
1174 // Fill out JavaCallArguments object
1175 args->iterate( Fingerprinter(method).fingerprint() );
1176 // Initialize result type
1177 result->set_type(args->get_ret_type());
1178
1179 // Invoke the method. Result is returned as oop.
1180 JavaCalls::call(result, method, &java_args, CHECK);
1181
1182 // Convert result
1183 if (result->get_type() == T_OBJECT || result->get_type() == T_ARRAY) {
1184 result->set_jobject(JNIHandles::make_local(env, (oop) result->get_jobject()));
1185 }
1186 }
1187
1188
1189 static instanceOop alloc_object(jclass clazz, TRAPS) {
1190 KlassHandle k(THREAD, java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz)));
1191 if (k == NULL) {
1192 ResourceMark rm(THREAD);
1193 THROW_(vmSymbols::java_lang_InstantiationException(), NULL);
1194 }
1195 k()->check_valid_for_instantiation(false, CHECK_NULL);
1196 InstanceKlass::cast(k())->initialize(CHECK_NULL);
1197 instanceOop ih = InstanceKlass::cast(k())->allocate_instance(THREAD);
1198 return ih;
1199 }
1200
1201 DT_RETURN_MARK_DECL(AllocObject, jobject
1202 , HOTSPOT_JNI_ALLOCOBJECT_RETURN(_ret_ref));
1203
1204 JNI_ENTRY(jobject, jni_AllocObject(JNIEnv *env, jclass clazz))
1205 JNIWrapper("AllocObject");
1206
1207 HOTSPOT_JNI_ALLOCOBJECT_ENTRY(env, clazz);
1208
1209 jobject ret = NULL;
1210 DT_RETURN_MARK(AllocObject, jobject, (const jobject&)ret);
1211
1212 instanceOop i = alloc_object(clazz, CHECK_NULL);
1213 ret = JNIHandles::make_local(env, i);
1214 return ret;
1215 JNI_END
1216
1217 DT_RETURN_MARK_DECL(NewObjectA, jobject
1218 , HOTSPOT_JNI_NEWOBJECTA_RETURN(_ret_ref));
1219
1220 JNI_ENTRY(jobject, jni_NewObjectA(JNIEnv *env, jclass clazz, jmethodID methodID, const jvalue *args))
1221 JNIWrapper("NewObjectA");
1222
1223 HOTSPOT_JNI_NEWOBJECTA_ENTRY(env, clazz, (uintptr_t) methodID);
1224
1225 jobject obj = NULL;
1226 DT_RETURN_MARK(NewObjectA, jobject, (const jobject)obj);
1227
1228 instanceOop i = alloc_object(clazz, CHECK_NULL);
1229 obj = JNIHandles::make_local(env, i);
1230 JavaValue jvalue(T_VOID);
1231 JNI_ArgumentPusherArray ap(methodID, args);
1232 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_NULL);
1233 return obj;
1234 JNI_END
1235
1236
1237 DT_RETURN_MARK_DECL(NewObjectV, jobject
1238 , HOTSPOT_JNI_NEWOBJECTV_RETURN(_ret_ref));
1239
1240 JNI_ENTRY(jobject, jni_NewObjectV(JNIEnv *env, jclass clazz, jmethodID methodID, va_list args))
1241 JNIWrapper("NewObjectV");
1242
1243 HOTSPOT_JNI_NEWOBJECTV_ENTRY(env, clazz, (uintptr_t) methodID);
1244
1245 jobject obj = NULL;
1246 DT_RETURN_MARK(NewObjectV, jobject, (const jobject&)obj);
1247
1248 instanceOop i = alloc_object(clazz, CHECK_NULL);
1249 obj = JNIHandles::make_local(env, i);
1250 JavaValue jvalue(T_VOID);
1251 JNI_ArgumentPusherVaArg ap(methodID, args);
1252 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_NULL);
1253 return obj;
1254 JNI_END
1255
1256
1257 DT_RETURN_MARK_DECL(NewObject, jobject
1258 , HOTSPOT_JNI_NEWOBJECT_RETURN(_ret_ref));
1259
1260 JNI_ENTRY(jobject, jni_NewObject(JNIEnv *env, jclass clazz, jmethodID methodID, ...))
1261 JNIWrapper("NewObject");
1262
1263 HOTSPOT_JNI_NEWOBJECT_ENTRY(env, clazz, (uintptr_t) methodID);
1264
1265 jobject obj = NULL;
1266 DT_RETURN_MARK(NewObject, jobject, (const jobject&)obj);
1267
1268 instanceOop i = alloc_object(clazz, CHECK_NULL);
1269 obj = JNIHandles::make_local(env, i);
1270 va_list args;
1271 va_start(args, methodID);
1272 JavaValue jvalue(T_VOID);
1273 JNI_ArgumentPusherVaArg ap(methodID, args);
1274 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_NULL);
1275 va_end(args);
1276 return obj;
1277 JNI_END
1278
1279
1280 JNI_ENTRY(jclass, jni_GetObjectClass(JNIEnv *env, jobject obj))
1281 JNIWrapper("GetObjectClass");
1282
1283 HOTSPOT_JNI_GETOBJECTCLASS_ENTRY(env, obj);
1284
1285 Klass* k = JNIHandles::resolve_non_null(obj)->klass();
1286 jclass ret =
1287 (jclass) JNIHandles::make_local(env, k->java_mirror());
1288
1289 HOTSPOT_JNI_GETOBJECTCLASS_RETURN(ret);
1290 return ret;
1291 JNI_END
1292
1293 JNI_QUICK_ENTRY(jboolean, jni_IsInstanceOf(JNIEnv *env, jobject obj, jclass clazz))
1294 JNIWrapper("IsInstanceOf");
1295
1296 HOTSPOT_JNI_ISINSTANCEOF_ENTRY(env, obj, clazz);
1297
1298 jboolean ret = JNI_TRUE;
1299 if (obj != NULL) {
1300 ret = JNI_FALSE;
1301 Klass* k = java_lang_Class::as_Klass(
1302 JNIHandles::resolve_non_null(clazz));
1303 if (k != NULL) {
1304 ret = JNIHandles::resolve_non_null(obj)->is_a(k) ? JNI_TRUE : JNI_FALSE;
1305 }
1306 }
1307
1308 HOTSPOT_JNI_ISINSTANCEOF_RETURN(ret);
1309 return ret;
1310 JNI_END
1311
1312
1313 static jmethodID get_method_id(JNIEnv *env, jclass clazz, const char *name_str,
1314 const char *sig, bool is_static, TRAPS) {
1315 // %%%% This code should probably just call into a method in the LinkResolver
1316 //
1317 // The class should have been loaded (we have an instance of the class
1318 // passed in) so the method and signature should already be in the symbol
1319 // table. If they're not there, the method doesn't exist.
1320 const char *name_to_probe = (name_str == NULL)
1321 ? vmSymbols::object_initializer_name()->as_C_string()
1322 : name_str;
1323 TempNewSymbol name = SymbolTable::probe(name_to_probe, (int)strlen(name_to_probe));
1324 TempNewSymbol signature = SymbolTable::probe(sig, (int)strlen(sig));
1325
1326 if (name == NULL || signature == NULL) {
1327 THROW_MSG_0(vmSymbols::java_lang_NoSuchMethodError(), name_str);
1328 }
1329
1330 // Throw a NoSuchMethodError exception if we have an instance of a
1331 // primitive java.lang.Class
1332 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(clazz))) {
1333 THROW_MSG_0(vmSymbols::java_lang_NoSuchMethodError(), name_str);
1334 }
1335
1336 KlassHandle klass(THREAD,
1337 java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz)));
1338
1339 // Make sure class is linked and initialized before handing id's out to
1340 // Method*s.
1341 klass()->initialize(CHECK_NULL);
1342
1343 Method* m;
1344 if (name == vmSymbols::object_initializer_name() ||
1345 name == vmSymbols::class_initializer_name()) {
1346 // Never search superclasses for constructors
1347 if (klass->oop_is_instance()) {
1348 m = InstanceKlass::cast(klass())->find_method(name, signature);
1349 } else {
1350 m = NULL;
1351 }
1352 } else {
1353 m = klass->lookup_method(name, signature);
1354 if (m == NULL && klass->oop_is_instance()) {
1355 m = InstanceKlass::cast(klass())->lookup_method_in_ordered_interfaces(name, signature);
1356 }
1357 }
1358 if (m == NULL || (m->is_static() != is_static)) {
1359 THROW_MSG_0(vmSymbols::java_lang_NoSuchMethodError(), name_str);
1360 }
1361 return m->jmethod_id();
1362 }
1363
1364
1365 JNI_ENTRY(jmethodID, jni_GetMethodID(JNIEnv *env, jclass clazz,
1366 const char *name, const char *sig))
1367 JNIWrapper("GetMethodID");
1368 HOTSPOT_JNI_GETMETHODID_ENTRY(env, clazz, (char *) name, (char *) sig);
1369 jmethodID ret = get_method_id(env, clazz, name, sig, false, thread);
1370 HOTSPOT_JNI_GETMETHODID_RETURN((uintptr_t) ret);
1371 return ret;
1372 JNI_END
1373
1374
1375 JNI_ENTRY(jmethodID, jni_GetStaticMethodID(JNIEnv *env, jclass clazz,
1376 const char *name, const char *sig))
1377 JNIWrapper("GetStaticMethodID");
1378 HOTSPOT_JNI_GETSTATICMETHODID_ENTRY(env, (char *) clazz, (char *) name, (char *)sig);
1379 jmethodID ret = get_method_id(env, clazz, name, sig, true, thread);
1380 HOTSPOT_JNI_GETSTATICMETHODID_RETURN((uintptr_t) ret);
1381 return ret;
1382 JNI_END
1383
1384
1385
1386 //
1387 // Calling Methods
1388 //
1389
1390
1391 #define DEFINE_CALLMETHOD(ResultType, Result, Tag \
1392 , EntryProbe, ReturnProbe) \
1393 \
1394 DT_RETURN_MARK_DECL_FOR(Result, Call##Result##Method, ResultType \
1395 , ReturnProbe); \
1396 \
1397 JNI_ENTRY(ResultType, \
1398 jni_Call##Result##Method(JNIEnv *env, jobject obj, jmethodID methodID, ...)) \
1399 JNIWrapper("Call" XSTR(Result) "Method"); \
1400 \
1401 EntryProbe; \
1402 ResultType ret = 0;\
1403 DT_RETURN_MARK_FOR(Result, Call##Result##Method, ResultType, \
1404 (const ResultType&)ret);\
1405 \
1406 va_list args; \
1407 va_start(args, methodID); \
1408 JavaValue jvalue(Tag); \
1409 JNI_ArgumentPusherVaArg ap(methodID, args); \
1410 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK_0); \
1411 va_end(args); \
1412 ret = jvalue.get_##ResultType(); \
1413 return ret;\
1414 JNI_END
1415
1416 // the runtime type of subword integral basic types is integer
1417 DEFINE_CALLMETHOD(jboolean, Boolean, T_BOOLEAN
1418 , HOTSPOT_JNI_CALLBOOLEANMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1419 HOTSPOT_JNI_CALLBOOLEANMETHOD_RETURN(_ret_ref))
1420 DEFINE_CALLMETHOD(jbyte, Byte, T_BYTE
1421 , HOTSPOT_JNI_CALLBYTEMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1422 HOTSPOT_JNI_CALLBYTEMETHOD_RETURN(_ret_ref))
1423 DEFINE_CALLMETHOD(jchar, Char, T_CHAR
1424 , HOTSPOT_JNI_CALLCHARMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1425 HOTSPOT_JNI_CALLCHARMETHOD_RETURN(_ret_ref))
1426 DEFINE_CALLMETHOD(jshort, Short, T_SHORT
1427 , HOTSPOT_JNI_CALLSHORTMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1428 HOTSPOT_JNI_CALLSHORTMETHOD_RETURN(_ret_ref))
1429
1430 DEFINE_CALLMETHOD(jobject, Object, T_OBJECT
1431 , HOTSPOT_JNI_CALLOBJECTMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1432 HOTSPOT_JNI_CALLOBJECTMETHOD_RETURN(_ret_ref))
1433 DEFINE_CALLMETHOD(jint, Int, T_INT,
1434 HOTSPOT_JNI_CALLINTMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1435 HOTSPOT_JNI_CALLINTMETHOD_RETURN(_ret_ref))
1436 DEFINE_CALLMETHOD(jlong, Long, T_LONG
1437 , HOTSPOT_JNI_CALLLONGMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1438 HOTSPOT_JNI_CALLLONGMETHOD_RETURN(_ret_ref))
1439 // Float and double probes don't return value because dtrace doesn't currently support it
1440 DEFINE_CALLMETHOD(jfloat, Float, T_FLOAT
1441 , HOTSPOT_JNI_CALLFLOATMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1442 HOTSPOT_JNI_CALLFLOATMETHOD_RETURN())
1443 DEFINE_CALLMETHOD(jdouble, Double, T_DOUBLE
1444 , HOTSPOT_JNI_CALLDOUBLEMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1445 HOTSPOT_JNI_CALLDOUBLEMETHOD_RETURN())
1446
1447 #define DEFINE_CALLMETHODV(ResultType, Result, Tag \
1448 , EntryProbe, ReturnProbe) \
1449 \
1450 DT_RETURN_MARK_DECL_FOR(Result, Call##Result##MethodV, ResultType \
1451 , ReturnProbe); \
1452 \
1453 JNI_ENTRY(ResultType, \
1454 jni_Call##Result##MethodV(JNIEnv *env, jobject obj, jmethodID methodID, va_list args)) \
1455 JNIWrapper("Call" XSTR(Result) "MethodV"); \
1456 \
1457 EntryProbe;\
1458 ResultType ret = 0;\
1459 DT_RETURN_MARK_FOR(Result, Call##Result##MethodV, ResultType, \
1460 (const ResultType&)ret);\
1461 \
1462 JavaValue jvalue(Tag); \
1463 JNI_ArgumentPusherVaArg ap(methodID, args); \
1464 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK_0); \
1465 ret = jvalue.get_##ResultType(); \
1466 return ret;\
1467 JNI_END
1468
1469 // the runtime type of subword integral basic types is integer
1470 DEFINE_CALLMETHODV(jboolean, Boolean, T_BOOLEAN
1471 , HOTSPOT_JNI_CALLBOOLEANMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1472 HOTSPOT_JNI_CALLBOOLEANMETHODV_RETURN(_ret_ref))
1473 DEFINE_CALLMETHODV(jbyte, Byte, T_BYTE
1474 , HOTSPOT_JNI_CALLBYTEMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1475 HOTSPOT_JNI_CALLBYTEMETHODV_RETURN(_ret_ref))
1476 DEFINE_CALLMETHODV(jchar, Char, T_CHAR
1477 , HOTSPOT_JNI_CALLCHARMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1478 HOTSPOT_JNI_CALLCHARMETHODV_RETURN(_ret_ref))
1479 DEFINE_CALLMETHODV(jshort, Short, T_SHORT
1480 , HOTSPOT_JNI_CALLSHORTMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1481 HOTSPOT_JNI_CALLSHORTMETHODV_RETURN(_ret_ref))
1482
1483 DEFINE_CALLMETHODV(jobject, Object, T_OBJECT
1484 , HOTSPOT_JNI_CALLOBJECTMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1485 HOTSPOT_JNI_CALLOBJECTMETHODV_RETURN(_ret_ref))
1486 DEFINE_CALLMETHODV(jint, Int, T_INT,
1487 HOTSPOT_JNI_CALLINTMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1488 HOTSPOT_JNI_CALLINTMETHODV_RETURN(_ret_ref))
1489 DEFINE_CALLMETHODV(jlong, Long, T_LONG
1490 , HOTSPOT_JNI_CALLLONGMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1491 HOTSPOT_JNI_CALLLONGMETHODV_RETURN(_ret_ref))
1492 // Float and double probes don't return value because dtrace doesn't currently support it
1493 DEFINE_CALLMETHODV(jfloat, Float, T_FLOAT
1494 , HOTSPOT_JNI_CALLFLOATMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1495 HOTSPOT_JNI_CALLFLOATMETHODV_RETURN())
1496 DEFINE_CALLMETHODV(jdouble, Double, T_DOUBLE
1497 , HOTSPOT_JNI_CALLDOUBLEMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1498 HOTSPOT_JNI_CALLDOUBLEMETHODV_RETURN())
1499
1500 #define DEFINE_CALLMETHODA(ResultType, Result, Tag \
1501 , EntryProbe, ReturnProbe) \
1502 \
1503 DT_RETURN_MARK_DECL_FOR(Result, Call##Result##MethodA, ResultType \
1504 , ReturnProbe); \
1505 \
1506 JNI_ENTRY(ResultType, \
1507 jni_Call##Result##MethodA(JNIEnv *env, jobject obj, jmethodID methodID, const jvalue *args)) \
1508 JNIWrapper("Call" XSTR(Result) "MethodA"); \
1509 EntryProbe; \
1510 ResultType ret = 0;\
1511 DT_RETURN_MARK_FOR(Result, Call##Result##MethodA, ResultType, \
1512 (const ResultType&)ret);\
1513 \
1514 JavaValue jvalue(Tag); \
1515 JNI_ArgumentPusherArray ap(methodID, args); \
1516 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK_0); \
1517 ret = jvalue.get_##ResultType(); \
1518 return ret;\
1519 JNI_END
1520
1521 // the runtime type of subword integral basic types is integer
1522 DEFINE_CALLMETHODA(jboolean, Boolean, T_BOOLEAN
1523 , HOTSPOT_JNI_CALLBOOLEANMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1524 HOTSPOT_JNI_CALLBOOLEANMETHODA_RETURN(_ret_ref))
1525 DEFINE_CALLMETHODA(jbyte, Byte, T_BYTE
1526 , HOTSPOT_JNI_CALLBYTEMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1527 HOTSPOT_JNI_CALLBYTEMETHODA_RETURN(_ret_ref))
1528 DEFINE_CALLMETHODA(jchar, Char, T_CHAR
1529 , HOTSPOT_JNI_CALLCHARMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1530 HOTSPOT_JNI_CALLCHARMETHODA_RETURN(_ret_ref))
1531 DEFINE_CALLMETHODA(jshort, Short, T_SHORT
1532 , HOTSPOT_JNI_CALLSHORTMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1533 HOTSPOT_JNI_CALLSHORTMETHODA_RETURN(_ret_ref))
1534
1535 DEFINE_CALLMETHODA(jobject, Object, T_OBJECT
1536 , HOTSPOT_JNI_CALLOBJECTMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1537 HOTSPOT_JNI_CALLOBJECTMETHODA_RETURN(_ret_ref))
1538 DEFINE_CALLMETHODA(jint, Int, T_INT,
1539 HOTSPOT_JNI_CALLINTMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1540 HOTSPOT_JNI_CALLINTMETHODA_RETURN(_ret_ref))
1541 DEFINE_CALLMETHODA(jlong, Long, T_LONG
1542 , HOTSPOT_JNI_CALLLONGMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1543 HOTSPOT_JNI_CALLLONGMETHODA_RETURN(_ret_ref))
1544 // Float and double probes don't return value because dtrace doesn't currently support it
1545 DEFINE_CALLMETHODA(jfloat, Float, T_FLOAT
1546 , HOTSPOT_JNI_CALLFLOATMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1547 HOTSPOT_JNI_CALLFLOATMETHODA_RETURN())
1548 DEFINE_CALLMETHODA(jdouble, Double, T_DOUBLE
1549 , HOTSPOT_JNI_CALLDOUBLEMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1550 HOTSPOT_JNI_CALLDOUBLEMETHODA_RETURN())
1551
1552 DT_VOID_RETURN_MARK_DECL(CallVoidMethod, HOTSPOT_JNI_CALLVOIDMETHOD_RETURN());
1553 DT_VOID_RETURN_MARK_DECL(CallVoidMethodV, HOTSPOT_JNI_CALLVOIDMETHODV_RETURN());
1554 DT_VOID_RETURN_MARK_DECL(CallVoidMethodA, HOTSPOT_JNI_CALLVOIDMETHODA_RETURN());
1555
1556
1557 JNI_ENTRY(void, jni_CallVoidMethod(JNIEnv *env, jobject obj, jmethodID methodID, ...))
1558 JNIWrapper("CallVoidMethod");
1559 HOTSPOT_JNI_CALLVOIDMETHOD_ENTRY(env, obj, (uintptr_t) methodID);
1560 DT_VOID_RETURN_MARK(CallVoidMethod);
1561
1562 va_list args;
1563 va_start(args, methodID);
1564 JavaValue jvalue(T_VOID);
1565 JNI_ArgumentPusherVaArg ap(methodID, args);
1566 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK);
1567 va_end(args);
1568 JNI_END
1569
1570
1571 JNI_ENTRY(void, jni_CallVoidMethodV(JNIEnv *env, jobject obj, jmethodID methodID, va_list args))
1572 JNIWrapper("CallVoidMethodV");
1573 HOTSPOT_JNI_CALLVOIDMETHODV_ENTRY(env, obj, (uintptr_t) methodID);
1574 DT_VOID_RETURN_MARK(CallVoidMethodV);
1575
1576 JavaValue jvalue(T_VOID);
1577 JNI_ArgumentPusherVaArg ap(methodID, args);
1578 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK);
1579 JNI_END
1580
1581
1582 JNI_ENTRY(void, jni_CallVoidMethodA(JNIEnv *env, jobject obj, jmethodID methodID, const jvalue *args))
1583 JNIWrapper("CallVoidMethodA");
1584 HOTSPOT_JNI_CALLVOIDMETHODA_ENTRY(env, obj, (uintptr_t) methodID);
1585 DT_VOID_RETURN_MARK(CallVoidMethodA);
1586
1587 JavaValue jvalue(T_VOID);
1588 JNI_ArgumentPusherArray ap(methodID, args);
1589 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK);
1590 JNI_END
1591
1592
1593
1594 #define DEFINE_CALLNONVIRTUALMETHOD(ResultType, Result, Tag \
1595 , EntryProbe, ReturnProbe) \
1596 \
1597 DT_RETURN_MARK_DECL_FOR(Result, CallNonvirtual##Result##Method, ResultType \
1598 , ReturnProbe);\
1599 \
1600 JNI_ENTRY(ResultType, \
1601 jni_CallNonvirtual##Result##Method(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, ...)) \
1602 JNIWrapper("CallNonvitual" XSTR(Result) "Method"); \
1603 \
1604 EntryProbe;\
1605 ResultType ret;\
1606 DT_RETURN_MARK_FOR(Result, CallNonvirtual##Result##Method, ResultType, \
1607 (const ResultType&)ret);\
1608 \
1609 va_list args; \
1610 va_start(args, methodID); \
1611 JavaValue jvalue(Tag); \
1612 JNI_ArgumentPusherVaArg ap(methodID, args); \
1613 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_0); \
1614 va_end(args); \
1615 ret = jvalue.get_##ResultType(); \
1616 return ret;\
1617 JNI_END
1618
1619 // the runtime type of subword integral basic types is integer
1620 DEFINE_CALLNONVIRTUALMETHOD(jboolean, Boolean, T_BOOLEAN
1621 , HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1622 HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHOD_RETURN(_ret_ref))
1623 DEFINE_CALLNONVIRTUALMETHOD(jbyte, Byte, T_BYTE
1624 , HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1625 HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHOD_RETURN(_ret_ref))
1626 DEFINE_CALLNONVIRTUALMETHOD(jchar, Char, T_CHAR
1627 , HOTSPOT_JNI_CALLNONVIRTUALCHARMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1628 HOTSPOT_JNI_CALLNONVIRTUALCHARMETHOD_RETURN(_ret_ref))
1629 DEFINE_CALLNONVIRTUALMETHOD(jshort, Short, T_SHORT
1630 , HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1631 HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHOD_RETURN(_ret_ref))
1632
1633 DEFINE_CALLNONVIRTUALMETHOD(jobject, Object, T_OBJECT
1634 , HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1635 HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHOD_RETURN(_ret_ref))
1636 DEFINE_CALLNONVIRTUALMETHOD(jint, Int, T_INT
1637 , HOTSPOT_JNI_CALLNONVIRTUALINTMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1638 HOTSPOT_JNI_CALLNONVIRTUALINTMETHOD_RETURN(_ret_ref))
1639 DEFINE_CALLNONVIRTUALMETHOD(jlong, Long, T_LONG
1640 , HOTSPOT_JNI_CALLNONVIRTUALLONGMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1641 // Float and double probes don't return value because dtrace doesn't currently support it
1642 HOTSPOT_JNI_CALLNONVIRTUALLONGMETHOD_RETURN(_ret_ref))
1643 DEFINE_CALLNONVIRTUALMETHOD(jfloat, Float, T_FLOAT
1644 , HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1645 HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHOD_RETURN())
1646 DEFINE_CALLNONVIRTUALMETHOD(jdouble, Double, T_DOUBLE
1647 , HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1648 HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHOD_RETURN())
1649
1650 #define DEFINE_CALLNONVIRTUALMETHODV(ResultType, Result, Tag \
1651 , EntryProbe, ReturnProbe) \
1652 \
1653 DT_RETURN_MARK_DECL_FOR(Result, CallNonvirtual##Result##MethodV, ResultType \
1654 , ReturnProbe);\
1655 \
1656 JNI_ENTRY(ResultType, \
1657 jni_CallNonvirtual##Result##MethodV(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, va_list args)) \
1658 JNIWrapper("CallNonvitual" XSTR(Result) "MethodV"); \
1659 \
1660 EntryProbe;\
1661 ResultType ret;\
1662 DT_RETURN_MARK_FOR(Result, CallNonvirtual##Result##MethodV, ResultType, \
1663 (const ResultType&)ret);\
1664 \
1665 JavaValue jvalue(Tag); \
1666 JNI_ArgumentPusherVaArg ap(methodID, args); \
1667 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_0); \
1668 ret = jvalue.get_##ResultType(); \
1669 return ret;\
1670 JNI_END
1671
1672 // the runtime type of subword integral basic types is integer
1673 DEFINE_CALLNONVIRTUALMETHODV(jboolean, Boolean, T_BOOLEAN
1674 , HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1675 HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHODV_RETURN(_ret_ref))
1676 DEFINE_CALLNONVIRTUALMETHODV(jbyte, Byte, T_BYTE
1677 , HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1678 HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHODV_RETURN(_ret_ref))
1679 DEFINE_CALLNONVIRTUALMETHODV(jchar, Char, T_CHAR
1680 , HOTSPOT_JNI_CALLNONVIRTUALCHARMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1681 HOTSPOT_JNI_CALLNONVIRTUALCHARMETHODV_RETURN(_ret_ref))
1682 DEFINE_CALLNONVIRTUALMETHODV(jshort, Short, T_SHORT
1683 , HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1684 HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHODV_RETURN(_ret_ref))
1685
1686 DEFINE_CALLNONVIRTUALMETHODV(jobject, Object, T_OBJECT
1687 , HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1688 HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHODV_RETURN(_ret_ref))
1689 DEFINE_CALLNONVIRTUALMETHODV(jint, Int, T_INT
1690 , HOTSPOT_JNI_CALLNONVIRTUALINTMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1691 HOTSPOT_JNI_CALLNONVIRTUALINTMETHODV_RETURN(_ret_ref))
1692 DEFINE_CALLNONVIRTUALMETHODV(jlong, Long, T_LONG
1693 , HOTSPOT_JNI_CALLNONVIRTUALLONGMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1694 // Float and double probes don't return value because dtrace doesn't currently support it
1695 HOTSPOT_JNI_CALLNONVIRTUALLONGMETHODV_RETURN(_ret_ref))
1696 DEFINE_CALLNONVIRTUALMETHODV(jfloat, Float, T_FLOAT
1697 , HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1698 HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHODV_RETURN())
1699 DEFINE_CALLNONVIRTUALMETHODV(jdouble, Double, T_DOUBLE
1700 , HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1701 HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHODV_RETURN())
1702
1703 #define DEFINE_CALLNONVIRTUALMETHODA(ResultType, Result, Tag \
1704 , EntryProbe, ReturnProbe) \
1705 \
1706 DT_RETURN_MARK_DECL_FOR(Result, CallNonvirtual##Result##MethodA, ResultType \
1707 , ReturnProbe);\
1708 \
1709 JNI_ENTRY(ResultType, \
1710 jni_CallNonvirtual##Result##MethodA(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, const jvalue *args)) \
1711 JNIWrapper("CallNonvitual" XSTR(Result) "MethodA"); \
1712 \
1713 EntryProbe;\
1714 ResultType ret;\
1715 DT_RETURN_MARK_FOR(Result, CallNonvirtual##Result##MethodA, ResultType, \
1716 (const ResultType&)ret);\
1717 \
1718 JavaValue jvalue(Tag); \
1719 JNI_ArgumentPusherArray ap(methodID, args); \
1720 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_0); \
1721 ret = jvalue.get_##ResultType(); \
1722 return ret;\
1723 JNI_END
1724
1725 // the runtime type of subword integral basic types is integer
1726 DEFINE_CALLNONVIRTUALMETHODA(jboolean, Boolean, T_BOOLEAN
1727 , HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1728 HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHODA_RETURN(_ret_ref))
1729 DEFINE_CALLNONVIRTUALMETHODA(jbyte, Byte, T_BYTE
1730 , HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1731 HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHODA_RETURN(_ret_ref))
1732 DEFINE_CALLNONVIRTUALMETHODA(jchar, Char, T_CHAR
1733 , HOTSPOT_JNI_CALLNONVIRTUALCHARMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1734 HOTSPOT_JNI_CALLNONVIRTUALCHARMETHODA_RETURN(_ret_ref))
1735 DEFINE_CALLNONVIRTUALMETHODA(jshort, Short, T_SHORT
1736 , HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1737 HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHODA_RETURN(_ret_ref))
1738
1739 DEFINE_CALLNONVIRTUALMETHODA(jobject, Object, T_OBJECT
1740 , HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1741 HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHODA_RETURN(_ret_ref))
1742 DEFINE_CALLNONVIRTUALMETHODA(jint, Int, T_INT
1743 , HOTSPOT_JNI_CALLNONVIRTUALINTMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1744 HOTSPOT_JNI_CALLNONVIRTUALINTMETHODA_RETURN(_ret_ref))
1745 DEFINE_CALLNONVIRTUALMETHODA(jlong, Long, T_LONG
1746 , HOTSPOT_JNI_CALLNONVIRTUALLONGMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1747 // Float and double probes don't return value because dtrace doesn't currently support it
1748 HOTSPOT_JNI_CALLNONVIRTUALLONGMETHODA_RETURN(_ret_ref))
1749 DEFINE_CALLNONVIRTUALMETHODA(jfloat, Float, T_FLOAT
1750 , HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1751 HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHODA_RETURN())
1752 DEFINE_CALLNONVIRTUALMETHODA(jdouble, Double, T_DOUBLE
1753 , HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1754 HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHODA_RETURN())
1755
1756 DT_VOID_RETURN_MARK_DECL(CallNonvirtualVoidMethod
1757 , HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHOD_RETURN());
1758 DT_VOID_RETURN_MARK_DECL(CallNonvirtualVoidMethodV
1759 , HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHODV_RETURN());
1760 DT_VOID_RETURN_MARK_DECL(CallNonvirtualVoidMethodA
1761 , HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHODA_RETURN());
1762
1763 JNI_ENTRY(void, jni_CallNonvirtualVoidMethod(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, ...))
1764 JNIWrapper("CallNonvirtualVoidMethod");
1765
1766 HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHOD_ENTRY(env, obj, cls, (uintptr_t) methodID);
1767 DT_VOID_RETURN_MARK(CallNonvirtualVoidMethod);
1768
1769 va_list args;
1770 va_start(args, methodID);
1771 JavaValue jvalue(T_VOID);
1772 JNI_ArgumentPusherVaArg ap(methodID, args);
1773 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK);
1774 va_end(args);
1775 JNI_END
1776
1777
1778 JNI_ENTRY(void, jni_CallNonvirtualVoidMethodV(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, va_list args))
1779 JNIWrapper("CallNonvirtualVoidMethodV");
1780
1781 HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHODV_ENTRY(
1782 env, obj, cls, (uintptr_t) methodID);
1783 DT_VOID_RETURN_MARK(CallNonvirtualVoidMethodV);
1784
1785 JavaValue jvalue(T_VOID);
1786 JNI_ArgumentPusherVaArg ap(methodID, args);
1787 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK);
1788 JNI_END
1789
1790
1791 JNI_ENTRY(void, jni_CallNonvirtualVoidMethodA(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, const jvalue *args))
1792 JNIWrapper("CallNonvirtualVoidMethodA");
1793 HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHODA_ENTRY(
1794 env, obj, cls, (uintptr_t) methodID);
1795 DT_VOID_RETURN_MARK(CallNonvirtualVoidMethodA);
1796 JavaValue jvalue(T_VOID);
1797 JNI_ArgumentPusherArray ap(methodID, args);
1798 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK);
1799 JNI_END
1800
1801
1802
1803 #define DEFINE_CALLSTATICMETHOD(ResultType, Result, Tag \
1804 , EntryProbe, ResultProbe) \
1805 \
1806 DT_RETURN_MARK_DECL_FOR(Result, CallStatic##Result##Method, ResultType \
1807 , ResultProbe); \
1808 \
1809 JNI_ENTRY(ResultType, \
1810 jni_CallStatic##Result##Method(JNIEnv *env, jclass cls, jmethodID methodID, ...)) \
1811 JNIWrapper("CallStatic" XSTR(Result) "Method"); \
1812 \
1813 EntryProbe; \
1814 ResultType ret = 0;\
1815 DT_RETURN_MARK_FOR(Result, CallStatic##Result##Method, ResultType, \
1816 (const ResultType&)ret);\
1817 \
1818 va_list args; \
1819 va_start(args, methodID); \
1820 JavaValue jvalue(Tag); \
1821 JNI_ArgumentPusherVaArg ap(methodID, args); \
1822 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK_0); \
1823 va_end(args); \
1824 ret = jvalue.get_##ResultType(); \
1825 return ret;\
1826 JNI_END
1827
1828 // the runtime type of subword integral basic types is integer
1829 DEFINE_CALLSTATICMETHOD(jboolean, Boolean, T_BOOLEAN
1830 , HOTSPOT_JNI_CALLSTATICBOOLEANMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1831 HOTSPOT_JNI_CALLSTATICBOOLEANMETHOD_RETURN(_ret_ref));
1832 DEFINE_CALLSTATICMETHOD(jbyte, Byte, T_BYTE
1833 , HOTSPOT_JNI_CALLSTATICBYTEMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1834 HOTSPOT_JNI_CALLSTATICBYTEMETHOD_RETURN(_ret_ref));
1835 DEFINE_CALLSTATICMETHOD(jchar, Char, T_CHAR
1836 , HOTSPOT_JNI_CALLSTATICCHARMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1837 HOTSPOT_JNI_CALLSTATICCHARMETHOD_RETURN(_ret_ref));
1838 DEFINE_CALLSTATICMETHOD(jshort, Short, T_SHORT
1839 , HOTSPOT_JNI_CALLSTATICSHORTMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1840 HOTSPOT_JNI_CALLSTATICSHORTMETHOD_RETURN(_ret_ref));
1841
1842 DEFINE_CALLSTATICMETHOD(jobject, Object, T_OBJECT
1843 , HOTSPOT_JNI_CALLSTATICOBJECTMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1844 HOTSPOT_JNI_CALLSTATICOBJECTMETHOD_RETURN(_ret_ref));
1845 DEFINE_CALLSTATICMETHOD(jint, Int, T_INT
1846 , HOTSPOT_JNI_CALLSTATICINTMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1847 HOTSPOT_JNI_CALLSTATICINTMETHOD_RETURN(_ret_ref));
1848 DEFINE_CALLSTATICMETHOD(jlong, Long, T_LONG
1849 , HOTSPOT_JNI_CALLSTATICLONGMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1850 HOTSPOT_JNI_CALLSTATICLONGMETHOD_RETURN(_ret_ref));
1851 // Float and double probes don't return value because dtrace doesn't currently support it
1852 DEFINE_CALLSTATICMETHOD(jfloat, Float, T_FLOAT
1853 , HOTSPOT_JNI_CALLSTATICFLOATMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1854 HOTSPOT_JNI_CALLSTATICFLOATMETHOD_RETURN());
1855 DEFINE_CALLSTATICMETHOD(jdouble, Double, T_DOUBLE
1856 , HOTSPOT_JNI_CALLSTATICDOUBLEMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1857 HOTSPOT_JNI_CALLSTATICDOUBLEMETHOD_RETURN());
1858
1859 #define DEFINE_CALLSTATICMETHODV(ResultType, Result, Tag \
1860 , EntryProbe, ResultProbe) \
1861 \
1862 DT_RETURN_MARK_DECL_FOR(Result, CallStatic##Result##MethodV, ResultType \
1863 , ResultProbe); \
1864 \
1865 JNI_ENTRY(ResultType, \
1866 jni_CallStatic##Result##MethodV(JNIEnv *env, jclass cls, jmethodID methodID, va_list args)) \
1867 JNIWrapper("CallStatic" XSTR(Result) "MethodV"); \
1868 \
1869 EntryProbe; \
1870 ResultType ret = 0;\
1871 DT_RETURN_MARK_FOR(Result, CallStatic##Result##MethodV, ResultType, \
1872 (const ResultType&)ret);\
1873 \
1874 JavaValue jvalue(Tag); \
1875 JNI_ArgumentPusherVaArg ap(methodID, args); \
1876 /* Make sure class is initialized before trying to invoke its method */ \
1877 KlassHandle k(THREAD, java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls))); \
1878 k()->initialize(CHECK_0); \
1879 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK_0); \
1880 va_end(args); \
1881 ret = jvalue.get_##ResultType(); \
1882 return ret;\
1883 JNI_END
1884
1885 // the runtime type of subword integral basic types is integer
1886 DEFINE_CALLSTATICMETHODV(jboolean, Boolean, T_BOOLEAN
1887 , HOTSPOT_JNI_CALLSTATICBOOLEANMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1888 HOTSPOT_JNI_CALLSTATICBOOLEANMETHODV_RETURN(_ret_ref));
1889 DEFINE_CALLSTATICMETHODV(jbyte, Byte, T_BYTE
1890 , HOTSPOT_JNI_CALLSTATICBYTEMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1891 HOTSPOT_JNI_CALLSTATICBYTEMETHODV_RETURN(_ret_ref));
1892 DEFINE_CALLSTATICMETHODV(jchar, Char, T_CHAR
1893 , HOTSPOT_JNI_CALLSTATICCHARMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1894 HOTSPOT_JNI_CALLSTATICCHARMETHODV_RETURN(_ret_ref));
1895 DEFINE_CALLSTATICMETHODV(jshort, Short, T_SHORT
1896 , HOTSPOT_JNI_CALLSTATICSHORTMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1897 HOTSPOT_JNI_CALLSTATICSHORTMETHODV_RETURN(_ret_ref));
1898
1899 DEFINE_CALLSTATICMETHODV(jobject, Object, T_OBJECT
1900 , HOTSPOT_JNI_CALLSTATICOBJECTMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1901 HOTSPOT_JNI_CALLSTATICOBJECTMETHODV_RETURN(_ret_ref));
1902 DEFINE_CALLSTATICMETHODV(jint, Int, T_INT
1903 , HOTSPOT_JNI_CALLSTATICINTMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1904 HOTSPOT_JNI_CALLSTATICINTMETHODV_RETURN(_ret_ref));
1905 DEFINE_CALLSTATICMETHODV(jlong, Long, T_LONG
1906 , HOTSPOT_JNI_CALLSTATICLONGMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1907 HOTSPOT_JNI_CALLSTATICLONGMETHODV_RETURN(_ret_ref));
1908 // Float and double probes don't return value because dtrace doesn't currently support it
1909 DEFINE_CALLSTATICMETHODV(jfloat, Float, T_FLOAT
1910 , HOTSPOT_JNI_CALLSTATICFLOATMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1911 HOTSPOT_JNI_CALLSTATICFLOATMETHODV_RETURN());
1912 DEFINE_CALLSTATICMETHODV(jdouble, Double, T_DOUBLE
1913 , HOTSPOT_JNI_CALLSTATICDOUBLEMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1914 HOTSPOT_JNI_CALLSTATICDOUBLEMETHODV_RETURN());
1915
1916 #define DEFINE_CALLSTATICMETHODA(ResultType, Result, Tag \
1917 , EntryProbe, ResultProbe) \
1918 \
1919 DT_RETURN_MARK_DECL_FOR(Result, CallStatic##Result##MethodA, ResultType \
1920 , ResultProbe); \
1921 \
1922 JNI_ENTRY(ResultType, \
1923 jni_CallStatic##Result##MethodA(JNIEnv *env, jclass cls, jmethodID methodID, const jvalue *args)) \
1924 JNIWrapper("CallStatic" XSTR(Result) "MethodA"); \
1925 \
1926 EntryProbe; \
1927 ResultType ret = 0;\
1928 DT_RETURN_MARK_FOR(Result, CallStatic##Result##MethodA, ResultType, \
1929 (const ResultType&)ret);\
1930 \
1931 JavaValue jvalue(Tag); \
1932 JNI_ArgumentPusherArray ap(methodID, args); \
1933 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK_0); \
1934 ret = jvalue.get_##ResultType(); \
1935 return ret;\
1936 JNI_END
1937
1938 // the runtime type of subword integral basic types is integer
1939 DEFINE_CALLSTATICMETHODA(jboolean, Boolean, T_BOOLEAN
1940 , HOTSPOT_JNI_CALLSTATICBOOLEANMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1941 HOTSPOT_JNI_CALLSTATICBOOLEANMETHODA_RETURN(_ret_ref));
1942 DEFINE_CALLSTATICMETHODA(jbyte, Byte, T_BYTE
1943 , HOTSPOT_JNI_CALLSTATICBYTEMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1944 HOTSPOT_JNI_CALLSTATICBYTEMETHODA_RETURN(_ret_ref));
1945 DEFINE_CALLSTATICMETHODA(jchar, Char, T_CHAR
1946 , HOTSPOT_JNI_CALLSTATICCHARMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1947 HOTSPOT_JNI_CALLSTATICCHARMETHODA_RETURN(_ret_ref));
1948 DEFINE_CALLSTATICMETHODA(jshort, Short, T_SHORT
1949 , HOTSPOT_JNI_CALLSTATICSHORTMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1950 HOTSPOT_JNI_CALLSTATICSHORTMETHODA_RETURN(_ret_ref));
1951
1952 DEFINE_CALLSTATICMETHODA(jobject, Object, T_OBJECT
1953 , HOTSPOT_JNI_CALLSTATICOBJECTMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1954 HOTSPOT_JNI_CALLSTATICOBJECTMETHODA_RETURN(_ret_ref));
1955 DEFINE_CALLSTATICMETHODA(jint, Int, T_INT
1956 , HOTSPOT_JNI_CALLSTATICINTMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1957 HOTSPOT_JNI_CALLSTATICINTMETHODA_RETURN(_ret_ref));
1958 DEFINE_CALLSTATICMETHODA(jlong, Long, T_LONG
1959 , HOTSPOT_JNI_CALLSTATICLONGMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1960 HOTSPOT_JNI_CALLSTATICLONGMETHODA_RETURN(_ret_ref));
1961 // Float and double probes don't return value because dtrace doesn't currently support it
1962 DEFINE_CALLSTATICMETHODA(jfloat, Float, T_FLOAT
1963 , HOTSPOT_JNI_CALLSTATICFLOATMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1964 HOTSPOT_JNI_CALLSTATICFLOATMETHODA_RETURN());
1965 DEFINE_CALLSTATICMETHODA(jdouble, Double, T_DOUBLE
1966 , HOTSPOT_JNI_CALLSTATICDOUBLEMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1967 HOTSPOT_JNI_CALLSTATICDOUBLEMETHODA_RETURN());
1968
1969 DT_VOID_RETURN_MARK_DECL(CallStaticVoidMethod
1970 , HOTSPOT_JNI_CALLSTATICVOIDMETHOD_RETURN());
1971 DT_VOID_RETURN_MARK_DECL(CallStaticVoidMethodV
1972 , HOTSPOT_JNI_CALLSTATICVOIDMETHODV_RETURN());
1973 DT_VOID_RETURN_MARK_DECL(CallStaticVoidMethodA
1974 , HOTSPOT_JNI_CALLSTATICVOIDMETHODA_RETURN());
1975
1976 JNI_ENTRY(void, jni_CallStaticVoidMethod(JNIEnv *env, jclass cls, jmethodID methodID, ...))
1977 JNIWrapper("CallStaticVoidMethod");
1978 HOTSPOT_JNI_CALLSTATICVOIDMETHOD_ENTRY(env, cls, (uintptr_t) methodID);
1979 DT_VOID_RETURN_MARK(CallStaticVoidMethod);
1980
1981 va_list args;
1982 va_start(args, methodID);
1983 JavaValue jvalue(T_VOID);
1984 JNI_ArgumentPusherVaArg ap(methodID, args);
1985 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK);
1986 va_end(args);
1987 JNI_END
1988
1989
1990 JNI_ENTRY(void, jni_CallStaticVoidMethodV(JNIEnv *env, jclass cls, jmethodID methodID, va_list args))
1991 JNIWrapper("CallStaticVoidMethodV");
1992 HOTSPOT_JNI_CALLSTATICVOIDMETHODV_ENTRY(env, cls, (uintptr_t) methodID);
1993 DT_VOID_RETURN_MARK(CallStaticVoidMethodV);
1994
1995 JavaValue jvalue(T_VOID);
1996 JNI_ArgumentPusherVaArg ap(methodID, args);
1997 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK);
1998 JNI_END
1999
2000
2001 JNI_ENTRY(void, jni_CallStaticVoidMethodA(JNIEnv *env, jclass cls, jmethodID methodID, const jvalue *args))
2002 JNIWrapper("CallStaticVoidMethodA");
2003 HOTSPOT_JNI_CALLSTATICVOIDMETHODA_ENTRY(env, cls, (uintptr_t) methodID);
2004 DT_VOID_RETURN_MARK(CallStaticVoidMethodA);
2005
2006 JavaValue jvalue(T_VOID);
2007 JNI_ArgumentPusherArray ap(methodID, args);
2008 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK);
2009 JNI_END
2010
2011
2012 //
2013 // Accessing Fields
2014 //
2015
2016
2017 DT_RETURN_MARK_DECL(GetFieldID, jfieldID
2018 , HOTSPOT_JNI_GETFIELDID_RETURN((uintptr_t)_ret_ref));
2019
2020 JNI_ENTRY(jfieldID, jni_GetFieldID(JNIEnv *env, jclass clazz,
2021 const char *name, const char *sig))
2022 JNIWrapper("GetFieldID");
2023 HOTSPOT_JNI_GETFIELDID_ENTRY(env, clazz, (char *) name, (char *) sig);
2024 jfieldID ret = 0;
2025 DT_RETURN_MARK(GetFieldID, jfieldID, (const jfieldID&)ret);
2026
2027 // The class should have been loaded (we have an instance of the class
2028 // passed in) so the field and signature should already be in the symbol
2029 // table. If they're not there, the field doesn't exist.
2030 TempNewSymbol fieldname = SymbolTable::probe(name, (int)strlen(name));
2031 TempNewSymbol signame = SymbolTable::probe(sig, (int)strlen(sig));
2032 if (fieldname == NULL || signame == NULL) {
2033 THROW_MSG_0(vmSymbols::java_lang_NoSuchFieldError(), (char*) name);
2034 }
2035 KlassHandle k(THREAD,
2036 java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz)));
2037 // Make sure class is initialized before handing id's out to fields
2038 k()->initialize(CHECK_NULL);
2039
2040 fieldDescriptor fd;
2041 if (!k()->oop_is_instance() ||
2042 !InstanceKlass::cast(k())->find_field(fieldname, signame, false, &fd)) {
2043 THROW_MSG_0(vmSymbols::java_lang_NoSuchFieldError(), (char*) name);
2044 }
2045
2046 // A jfieldID for a non-static field is simply the offset of the field within the instanceOop
2047 // It may also have hash bits for k, if VerifyJNIFields is turned on.
2048 ret = jfieldIDWorkaround::to_instance_jfieldID(k(), fd.offset());
2049 return ret;
2050 JNI_END
2051
2052
2053 JNI_ENTRY(jobject, jni_GetObjectField(JNIEnv *env, jobject obj, jfieldID fieldID))
2054 JNIWrapper("GetObjectField");
2055 HOTSPOT_JNI_GETOBJECTFIELD_ENTRY(env, obj, (uintptr_t) fieldID);
2056 oop o = JNIHandles::resolve_non_null(obj);
2057 Klass* k = o->klass();
2058 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID);
2059 // Keep JVMTI addition small and only check enabled flag here.
2060 // jni_GetField_probe() assumes that is okay to create handles.
2061 if (JvmtiExport::should_post_field_access()) {
2062 o = JvmtiExport::jni_GetField_probe(thread, obj, o, k, fieldID, false);
2063 }
2064 jobject ret = JNIHandles::make_local(env, o->obj_field(offset));
2065 #if INCLUDE_ALL_GCS
2066 // If G1 is enabled and we are accessing the value of the referent
2067 // field in a reference object then we need to register a non-null
2068 // referent with the SATB barrier.
2069 if (UseG1GC) {
2070 bool needs_barrier = false;
2071
2072 if (ret != NULL &&
2073 offset == java_lang_ref_Reference::referent_offset &&
2074 InstanceKlass::cast(k)->reference_type() != REF_NONE) {
2075 assert(InstanceKlass::cast(k)->is_subclass_of(SystemDictionary::Reference_klass()), "sanity");
2076 needs_barrier = true;
2077 }
2078
2079 if (needs_barrier) {
2080 oop referent = JNIHandles::resolve(ret);
2081 G1SATBCardTableModRefBS::enqueue(referent);
2082 }
2083 }
2084 #endif // INCLUDE_ALL_GCS
2085 HOTSPOT_JNI_GETOBJECTFIELD_RETURN(ret);
2086 return ret;
2087 JNI_END
2088
2089
2090
2091 #define DEFINE_GETFIELD(Return,Fieldname,Result \
2092 , EntryProbe, ReturnProbe) \
2093 \
2094 DT_RETURN_MARK_DECL_FOR(Result, Get##Result##Field, Return \
2095 , ReturnProbe); \
2096 \
2097 JNI_QUICK_ENTRY(Return, jni_Get##Result##Field(JNIEnv *env, jobject obj, jfieldID fieldID)) \
2098 JNIWrapper("Get" XSTR(Result) "Field"); \
2099 \
2100 EntryProbe; \
2101 Return ret = 0;\
2102 DT_RETURN_MARK_FOR(Result, Get##Result##Field, Return, (const Return&)ret);\
2103 \
2104 oop o = JNIHandles::resolve_non_null(obj); \
2105 Klass* k = o->klass(); \
2106 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID); \
2107 /* Keep JVMTI addition small and only check enabled flag here. */ \
2108 /* jni_GetField_probe_nh() assumes that is not okay to create handles */ \
2109 /* and creates a ResetNoHandleMark. */ \
2110 if (JvmtiExport::should_post_field_access()) { \
2111 o = JvmtiExport::jni_GetField_probe_nh(thread, obj, o, k, fieldID, false); \
2112 } \
2113 ret = o->Fieldname##_field(offset); \
2114 return ret; \
2115 JNI_END
2116
2117 DEFINE_GETFIELD(jboolean, bool, Boolean
2118 , HOTSPOT_JNI_GETBOOLEANFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2119 HOTSPOT_JNI_GETBOOLEANFIELD_RETURN(_ret_ref))
2120 DEFINE_GETFIELD(jbyte, byte, Byte
2121 , HOTSPOT_JNI_GETBYTEFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2122 HOTSPOT_JNI_GETBYTEFIELD_RETURN(_ret_ref))
2123 DEFINE_GETFIELD(jchar, char, Char
2124 , HOTSPOT_JNI_GETCHARFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2125 HOTSPOT_JNI_GETCHARFIELD_RETURN(_ret_ref))
2126 DEFINE_GETFIELD(jshort, short, Short
2127 , HOTSPOT_JNI_GETSHORTFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2128 HOTSPOT_JNI_GETSHORTFIELD_RETURN(_ret_ref))
2129 DEFINE_GETFIELD(jint, int, Int
2130 , HOTSPOT_JNI_GETINTFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2131 HOTSPOT_JNI_GETINTFIELD_RETURN(_ret_ref))
2132 DEFINE_GETFIELD(jlong, long, Long
2133 , HOTSPOT_JNI_GETLONGFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2134 HOTSPOT_JNI_GETLONGFIELD_RETURN(_ret_ref))
2135 // Float and double probes don't return value because dtrace doesn't currently support it
2136 DEFINE_GETFIELD(jfloat, float, Float
2137 , HOTSPOT_JNI_GETFLOATFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2138 HOTSPOT_JNI_GETFLOATFIELD_RETURN())
2139 DEFINE_GETFIELD(jdouble, double, Double
2140 , HOTSPOT_JNI_GETDOUBLEFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2141 HOTSPOT_JNI_GETDOUBLEFIELD_RETURN())
2142
2143 address jni_GetBooleanField_addr() {
2144 return (address)jni_GetBooleanField;
2145 }
2146 address jni_GetByteField_addr() {
2147 return (address)jni_GetByteField;
2148 }
2149 address jni_GetCharField_addr() {
2150 return (address)jni_GetCharField;
2151 }
2152 address jni_GetShortField_addr() {
2153 return (address)jni_GetShortField;
2154 }
2155 address jni_GetIntField_addr() {
2156 return (address)jni_GetIntField;
2157 }
2158 address jni_GetLongField_addr() {
2159 return (address)jni_GetLongField;
2160 }
2161 address jni_GetFloatField_addr() {
2162 return (address)jni_GetFloatField;
2163 }
2164 address jni_GetDoubleField_addr() {
2165 return (address)jni_GetDoubleField;
2166 }
2167
2168 JNI_QUICK_ENTRY(void, jni_SetObjectField(JNIEnv *env, jobject obj, jfieldID fieldID, jobject value))
2169 JNIWrapper("SetObjectField");
2170 HOTSPOT_JNI_SETOBJECTFIELD_ENTRY(env, obj, (uintptr_t) fieldID, value);
2171 oop o = JNIHandles::resolve_non_null(obj);
2172 Klass* k = o->klass();
2173 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID);
2174 // Keep JVMTI addition small and only check enabled flag here.
2175 // jni_SetField_probe_nh() assumes that is not okay to create handles
2176 // and creates a ResetNoHandleMark.
2177 if (JvmtiExport::should_post_field_modification()) {
2178 jvalue field_value;
2179 field_value.l = value;
2180 o = JvmtiExport::jni_SetField_probe_nh(thread, obj, o, k, fieldID, false, 'L', (jvalue *)&field_value);
2181 }
2182 o->obj_field_put(offset, JNIHandles::resolve(value));
2183 HOTSPOT_JNI_SETOBJECTFIELD_RETURN();
2184 JNI_END
2185
2186
2187 #define DEFINE_SETFIELD(Argument,Fieldname,Result,SigType,unionType \
2188 , EntryProbe, ReturnProbe) \
2189 \
2190 JNI_QUICK_ENTRY(void, jni_Set##Result##Field(JNIEnv *env, jobject obj, jfieldID fieldID, Argument value)) \
2191 JNIWrapper("Set" XSTR(Result) "Field"); \
2192 \
2193 EntryProbe; \
2194 \
2195 oop o = JNIHandles::resolve_non_null(obj); \
2196 Klass* k = o->klass(); \
2197 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID); \
2198 /* Keep JVMTI addition small and only check enabled flag here. */ \
2199 /* jni_SetField_probe_nh() assumes that is not okay to create handles */ \
2200 /* and creates a ResetNoHandleMark. */ \
2201 if (JvmtiExport::should_post_field_modification()) { \
2202 jvalue field_value; \
2203 field_value.unionType = value; \
2204 o = JvmtiExport::jni_SetField_probe_nh(thread, obj, o, k, fieldID, false, SigType, (jvalue *)&field_value); \
2205 } \
2206 o->Fieldname##_field_put(offset, value); \
2207 ReturnProbe; \
2208 JNI_END
2209
2210 DEFINE_SETFIELD(jboolean, bool, Boolean, 'Z', z
2211 , HOTSPOT_JNI_SETBOOLEANFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value),
2212 HOTSPOT_JNI_SETBOOLEANFIELD_RETURN())
2213 DEFINE_SETFIELD(jbyte, byte, Byte, 'B', b
2214 , HOTSPOT_JNI_SETBYTEFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value),
2215 HOTSPOT_JNI_SETBYTEFIELD_RETURN())
2216 DEFINE_SETFIELD(jchar, char, Char, 'C', c
2217 , HOTSPOT_JNI_SETCHARFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value),
2218 HOTSPOT_JNI_SETCHARFIELD_RETURN())
2219 DEFINE_SETFIELD(jshort, short, Short, 'S', s
2220 , HOTSPOT_JNI_SETSHORTFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value),
2221 HOTSPOT_JNI_SETSHORTFIELD_RETURN())
2222 DEFINE_SETFIELD(jint, int, Int, 'I', i
2223 , HOTSPOT_JNI_SETINTFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value),
2224 HOTSPOT_JNI_SETINTFIELD_RETURN())
2225 DEFINE_SETFIELD(jlong, long, Long, 'J', j
2226 , HOTSPOT_JNI_SETLONGFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value),
2227 HOTSPOT_JNI_SETLONGFIELD_RETURN())
2228 // Float and double probes don't return value because dtrace doesn't currently support it
2229 DEFINE_SETFIELD(jfloat, float, Float, 'F', f
2230 , HOTSPOT_JNI_SETFLOATFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2231 HOTSPOT_JNI_SETFLOATFIELD_RETURN())
2232 DEFINE_SETFIELD(jdouble, double, Double, 'D', d
2233 , HOTSPOT_JNI_SETDOUBLEFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2234 HOTSPOT_JNI_SETDOUBLEFIELD_RETURN())
2235
2236 DT_RETURN_MARK_DECL(ToReflectedField, jobject
2237 , HOTSPOT_JNI_TOREFLECTEDFIELD_RETURN(_ret_ref));
2238
2239 JNI_ENTRY(jobject, jni_ToReflectedField(JNIEnv *env, jclass cls, jfieldID fieldID, jboolean isStatic))
2240 JNIWrapper("ToReflectedField");
2241 HOTSPOT_JNI_TOREFLECTEDFIELD_ENTRY(env, cls, (uintptr_t) fieldID, isStatic);
2242 jobject ret = NULL;
2243 DT_RETURN_MARK(ToReflectedField, jobject, (const jobject&)ret);
2244
2245 fieldDescriptor fd;
2246 bool found = false;
2247 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2248
2249 assert(jfieldIDWorkaround::is_static_jfieldID(fieldID) == (isStatic != 0), "invalid fieldID");
2250
2251 if (isStatic) {
2252 // Static field. The fieldID a JNIid specifying the field holder and the offset within the Klass*.
2253 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID);
2254 assert(id->is_static_field_id(), "invalid static field id");
2255 found = id->find_local_field(&fd);
2256 } else {
2257 // Non-static field. The fieldID is really the offset of the field within the instanceOop.
2258 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID);
2259 found = InstanceKlass::cast(k)->find_field_from_offset(offset, false, &fd);
2260 }
2261 assert(found, "bad fieldID passed into jni_ToReflectedField");
2262 oop reflected = Reflection::new_field(&fd, CHECK_NULL);
2263 ret = JNIHandles::make_local(env, reflected);
2264 return ret;
2265 JNI_END
2266
2267
2268 //
2269 // Accessing Static Fields
2270 //
2271 DT_RETURN_MARK_DECL(GetStaticFieldID, jfieldID
2272 , HOTSPOT_JNI_GETSTATICFIELDID_RETURN((uintptr_t)_ret_ref));
2273
2274 JNI_ENTRY(jfieldID, jni_GetStaticFieldID(JNIEnv *env, jclass clazz,
2275 const char *name, const char *sig))
2276 JNIWrapper("GetStaticFieldID");
2277 HOTSPOT_JNI_GETSTATICFIELDID_ENTRY(env, clazz, (char *) name, (char *) sig);
2278 jfieldID ret = NULL;
2279 DT_RETURN_MARK(GetStaticFieldID, jfieldID, (const jfieldID&)ret);
2280
2281 // The class should have been loaded (we have an instance of the class
2282 // passed in) so the field and signature should already be in the symbol
2283 // table. If they're not there, the field doesn't exist.
2284 TempNewSymbol fieldname = SymbolTable::probe(name, (int)strlen(name));
2285 TempNewSymbol signame = SymbolTable::probe(sig, (int)strlen(sig));
2286 if (fieldname == NULL || signame == NULL) {
2287 THROW_MSG_0(vmSymbols::java_lang_NoSuchFieldError(), (char*) name);
2288 }
2289 KlassHandle k(THREAD,
2290 java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz)));
2291 // Make sure class is initialized before handing id's out to static fields
2292 k()->initialize(CHECK_NULL);
2293
2294 fieldDescriptor fd;
2295 if (!k()->oop_is_instance() ||
2296 !InstanceKlass::cast(k())->find_field(fieldname, signame, true, &fd)) {
2297 THROW_MSG_0(vmSymbols::java_lang_NoSuchFieldError(), (char*) name);
2298 }
2299
2300 // A jfieldID for a static field is a JNIid specifying the field holder and the offset within the Klass*
2301 JNIid* id = fd.field_holder()->jni_id_for(fd.offset());
2302 debug_only(id->set_is_static_field_id();)
2303
2304 debug_only(id->verify(fd.field_holder()));
2305
2306 ret = jfieldIDWorkaround::to_static_jfieldID(id);
2307 return ret;
2308 JNI_END
2309
2310
2311 JNI_ENTRY(jobject, jni_GetStaticObjectField(JNIEnv *env, jclass clazz, jfieldID fieldID))
2312 JNIWrapper("GetStaticObjectField");
2313 HOTSPOT_JNI_GETSTATICOBJECTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID);
2314 #if INCLUDE_JNI_CHECK
2315 DEBUG_ONLY(Klass* param_k = jniCheck::validate_class(thread, clazz);)
2316 #endif // INCLUDE_JNI_CHECK
2317 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID);
2318 assert(id->is_static_field_id(), "invalid static field id");
2319 // Keep JVMTI addition small and only check enabled flag here.
2320 // jni_GetField_probe() assumes that is okay to create handles.
2321 if (JvmtiExport::should_post_field_access()) {
2322 JvmtiExport::jni_GetField_probe(thread, NULL, NULL, id->holder(), fieldID, true);
2323 }
2324 jobject ret = JNIHandles::make_local(id->holder()->java_mirror()->obj_field(id->offset()));
2325 HOTSPOT_JNI_GETSTATICOBJECTFIELD_RETURN(ret);
2326 return ret;
2327 JNI_END
2328
2329
2330 #define DEFINE_GETSTATICFIELD(Return,Fieldname,Result \
2331 , EntryProbe, ReturnProbe) \
2332 \
2333 DT_RETURN_MARK_DECL_FOR(Result, GetStatic##Result##Field, Return \
2334 , ReturnProbe); \
2335 \
2336 JNI_ENTRY(Return, jni_GetStatic##Result##Field(JNIEnv *env, jclass clazz, jfieldID fieldID)) \
2337 JNIWrapper("GetStatic" XSTR(Result) "Field"); \
2338 EntryProbe; \
2339 Return ret = 0;\
2340 DT_RETURN_MARK_FOR(Result, GetStatic##Result##Field, Return, \
2341 (const Return&)ret);\
2342 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID); \
2343 assert(id->is_static_field_id(), "invalid static field id"); \
2344 /* Keep JVMTI addition small and only check enabled flag here. */ \
2345 /* jni_GetField_probe() assumes that is okay to create handles. */ \
2346 if (JvmtiExport::should_post_field_access()) { \
2347 JvmtiExport::jni_GetField_probe(thread, NULL, NULL, id->holder(), fieldID, true); \
2348 } \
2349 ret = id->holder()->java_mirror()-> Fieldname##_field (id->offset()); \
2350 return ret;\
2351 JNI_END
2352
2353 DEFINE_GETSTATICFIELD(jboolean, bool, Boolean
2354 , HOTSPOT_JNI_GETSTATICBOOLEANFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICBOOLEANFIELD_RETURN(_ret_ref))
2355 DEFINE_GETSTATICFIELD(jbyte, byte, Byte
2356 , HOTSPOT_JNI_GETSTATICBYTEFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICBYTEFIELD_RETURN(_ret_ref) )
2357 DEFINE_GETSTATICFIELD(jchar, char, Char
2358 , HOTSPOT_JNI_GETSTATICCHARFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICCHARFIELD_RETURN(_ret_ref) )
2359 DEFINE_GETSTATICFIELD(jshort, short, Short
2360 , HOTSPOT_JNI_GETSTATICSHORTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICSHORTFIELD_RETURN(_ret_ref) )
2361 DEFINE_GETSTATICFIELD(jint, int, Int
2362 , HOTSPOT_JNI_GETSTATICINTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICINTFIELD_RETURN(_ret_ref) )
2363 DEFINE_GETSTATICFIELD(jlong, long, Long
2364 , HOTSPOT_JNI_GETSTATICLONGFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICLONGFIELD_RETURN(_ret_ref) )
2365 // Float and double probes don't return value because dtrace doesn't currently support it
2366 DEFINE_GETSTATICFIELD(jfloat, float, Float
2367 , HOTSPOT_JNI_GETSTATICFLOATFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICFLOATFIELD_RETURN() )
2368 DEFINE_GETSTATICFIELD(jdouble, double, Double
2369 , HOTSPOT_JNI_GETSTATICDOUBLEFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICDOUBLEFIELD_RETURN() )
2370
2371 JNI_ENTRY(void, jni_SetStaticObjectField(JNIEnv *env, jclass clazz, jfieldID fieldID, jobject value))
2372 JNIWrapper("SetStaticObjectField");
2373 HOTSPOT_JNI_SETSTATICOBJECTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value);
2374 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID);
2375 assert(id->is_static_field_id(), "invalid static field id");
2376 // Keep JVMTI addition small and only check enabled flag here.
2377 // jni_SetField_probe() assumes that is okay to create handles.
2378 if (JvmtiExport::should_post_field_modification()) {
2379 jvalue field_value;
2380 field_value.l = value;
2381 JvmtiExport::jni_SetField_probe(thread, NULL, NULL, id->holder(), fieldID, true, 'L', (jvalue *)&field_value);
2382 }
2383 id->holder()->java_mirror()->obj_field_put(id->offset(), JNIHandles::resolve(value));
2384 HOTSPOT_JNI_SETSTATICOBJECTFIELD_RETURN();
2385 JNI_END
2386
2387
2388
2389 #define DEFINE_SETSTATICFIELD(Argument,Fieldname,Result,SigType,unionType \
2390 , EntryProbe, ReturnProbe) \
2391 \
2392 JNI_ENTRY(void, jni_SetStatic##Result##Field(JNIEnv *env, jclass clazz, jfieldID fieldID, Argument value)) \
2393 JNIWrapper("SetStatic" XSTR(Result) "Field"); \
2394 EntryProbe; \
2395 \
2396 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID); \
2397 assert(id->is_static_field_id(), "invalid static field id"); \
2398 /* Keep JVMTI addition small and only check enabled flag here. */ \
2399 /* jni_SetField_probe() assumes that is okay to create handles. */ \
2400 if (JvmtiExport::should_post_field_modification()) { \
2401 jvalue field_value; \
2402 field_value.unionType = value; \
2403 JvmtiExport::jni_SetField_probe(thread, NULL, NULL, id->holder(), fieldID, true, SigType, (jvalue *)&field_value); \
2404 } \
2405 id->holder()->java_mirror()-> Fieldname##_field_put (id->offset(), value); \
2406 ReturnProbe;\
2407 JNI_END
2408
2409 DEFINE_SETSTATICFIELD(jboolean, bool, Boolean, 'Z', z
2410 , HOTSPOT_JNI_SETSTATICBOOLEANFIELD_ENTRY(env, clazz, (uintptr_t)fieldID, value),
2411 HOTSPOT_JNI_SETSTATICBOOLEANFIELD_RETURN())
2412 DEFINE_SETSTATICFIELD(jbyte, byte, Byte, 'B', b
2413 , HOTSPOT_JNI_SETSTATICBYTEFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value),
2414 HOTSPOT_JNI_SETSTATICBYTEFIELD_RETURN())
2415 DEFINE_SETSTATICFIELD(jchar, char, Char, 'C', c
2416 , HOTSPOT_JNI_SETSTATICCHARFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value),
2417 HOTSPOT_JNI_SETSTATICCHARFIELD_RETURN())
2418 DEFINE_SETSTATICFIELD(jshort, short, Short, 'S', s
2419 , HOTSPOT_JNI_SETSTATICSHORTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value),
2420 HOTSPOT_JNI_SETSTATICSHORTFIELD_RETURN())
2421 DEFINE_SETSTATICFIELD(jint, int, Int, 'I', i
2422 , HOTSPOT_JNI_SETSTATICINTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value),
2423 HOTSPOT_JNI_SETSTATICINTFIELD_RETURN())
2424 DEFINE_SETSTATICFIELD(jlong, long, Long, 'J', j
2425 , HOTSPOT_JNI_SETSTATICLONGFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value),
2426 HOTSPOT_JNI_SETSTATICLONGFIELD_RETURN())
2427 // Float and double probes don't return value because dtrace doesn't currently support it
2428 DEFINE_SETSTATICFIELD(jfloat, float, Float, 'F', f
2429 , HOTSPOT_JNI_SETSTATICFLOATFIELD_ENTRY(env, clazz, (uintptr_t) fieldID),
2430 HOTSPOT_JNI_SETSTATICFLOATFIELD_RETURN())
2431 DEFINE_SETSTATICFIELD(jdouble, double, Double, 'D', d
2432 , HOTSPOT_JNI_SETSTATICDOUBLEFIELD_ENTRY(env, clazz, (uintptr_t) fieldID),
2433 HOTSPOT_JNI_SETSTATICDOUBLEFIELD_RETURN())
2434
2435 //
2436 // String Operations
2437 //
2438
2439 // Unicode Interface
2440
2441 DT_RETURN_MARK_DECL(NewString, jstring
2442 , HOTSPOT_JNI_NEWSTRING_RETURN(_ret_ref));
2443
2444 JNI_ENTRY(jstring, jni_NewString(JNIEnv *env, const jchar *unicodeChars, jsize len))
2445 JNIWrapper("NewString");
2446 HOTSPOT_JNI_NEWSTRING_ENTRY(env, (uint16_t *) unicodeChars, len);
2447 jstring ret = NULL;
2448 DT_RETURN_MARK(NewString, jstring, (const jstring&)ret);
2449 oop string=java_lang_String::create_oop_from_unicode((jchar*) unicodeChars, len, CHECK_NULL);
2450 ret = (jstring) JNIHandles::make_local(env, string);
2451 return ret;
2452 JNI_END
2453
2454
2455 JNI_QUICK_ENTRY(jsize, jni_GetStringLength(JNIEnv *env, jstring string))
2456 JNIWrapper("GetStringLength");
2457 HOTSPOT_JNI_GETSTRINGLENGTH_ENTRY(env, string);
2458 jsize ret = 0;
2459 oop s = JNIHandles::resolve_non_null(string);
2460 if (java_lang_String::value(s) != NULL) {
2461 ret = java_lang_String::length(s);
2462 }
2463 HOTSPOT_JNI_GETSTRINGLENGTH_RETURN(ret);
2464 return ret;
2465 JNI_END
2466
2467
2468 JNI_QUICK_ENTRY(const jchar*, jni_GetStringChars(
2469 JNIEnv *env, jstring string, jboolean *isCopy))
2470 JNIWrapper("GetStringChars");
2471 HOTSPOT_JNI_GETSTRINGCHARS_ENTRY(env, string, (uintptr_t *) isCopy);
2472 jchar* buf = NULL;
2473 oop s = JNIHandles::resolve_non_null(string);
2474 typeArrayOop s_value = java_lang_String::value(s);
2475 if (s_value != NULL) {
2476 int s_len = java_lang_String::length(s);
2477 int s_offset = java_lang_String::offset(s);
2478 buf = NEW_C_HEAP_ARRAY_RETURN_NULL(jchar, s_len + 1, mtInternal); // add one for zero termination
2479 /* JNI Specification states return NULL on OOM */
2480 if (buf != NULL) {
2481 if (s_len > 0) {
2482 memcpy(buf, s_value->char_at_addr(s_offset), sizeof(jchar)*s_len);
2483 }
2484 buf[s_len] = 0;
2485 //%note jni_5
2486 if (isCopy != NULL) {
2487 *isCopy = JNI_TRUE;
2488 }
2489 }
2490 }
2491 HOTSPOT_JNI_GETSTRINGCHARS_RETURN(buf);
2492 return buf;
2493 JNI_END
2494
2495
2496 JNI_QUICK_ENTRY(void, jni_ReleaseStringChars(JNIEnv *env, jstring str, const jchar *chars))
2497 JNIWrapper("ReleaseStringChars");
2498 HOTSPOT_JNI_RELEASESTRINGCHARS_ENTRY(env, str, (uint16_t *) chars);
2499 //%note jni_6
2500 if (chars != NULL) {
2501 // Since String objects are supposed to be immutable, don't copy any
2502 // new data back. A bad user will have to go after the char array.
2503 FreeHeap((void*) chars);
2504 }
2505 HOTSPOT_JNI_RELEASESTRINGCHARS_RETURN();
2506 JNI_END
2507
2508
2509 // UTF Interface
2510
2511 DT_RETURN_MARK_DECL(NewStringUTF, jstring
2512 , HOTSPOT_JNI_NEWSTRINGUTF_RETURN(_ret_ref));
2513
2514 JNI_ENTRY(jstring, jni_NewStringUTF(JNIEnv *env, const char *bytes))
2515 JNIWrapper("NewStringUTF");
2516 HOTSPOT_JNI_NEWSTRINGUTF_ENTRY(env, (char *) bytes);
2517 jstring ret;
2518 DT_RETURN_MARK(NewStringUTF, jstring, (const jstring&)ret);
2519
2520 oop result = java_lang_String::create_oop_from_str((char*) bytes, CHECK_NULL);
2521 ret = (jstring) JNIHandles::make_local(env, result);
2522 return ret;
2523 JNI_END
2524
2525
2526 JNI_ENTRY(jsize, jni_GetStringUTFLength(JNIEnv *env, jstring string))
2527 JNIWrapper("GetStringUTFLength");
2528 HOTSPOT_JNI_GETSTRINGUTFLENGTH_ENTRY(env, string);
2529 jsize ret = 0;
2530 oop java_string = JNIHandles::resolve_non_null(string);
2531 if (java_lang_String::value(java_string) != NULL) {
2532 ret = java_lang_String::utf8_length(java_string);
2533 }
2534 HOTSPOT_JNI_GETSTRINGUTFLENGTH_RETURN(ret);
2535 return ret;
2536 JNI_END
2537
2538
2539 JNI_ENTRY(const char*, jni_GetStringUTFChars(JNIEnv *env, jstring string, jboolean *isCopy))
2540 JNIWrapper("GetStringUTFChars");
2541 HOTSPOT_JNI_GETSTRINGUTFCHARS_ENTRY(env, string, (uintptr_t *) isCopy);
2542 char* result = NULL;
2543 oop java_string = JNIHandles::resolve_non_null(string);
2544 if (java_lang_String::value(java_string) != NULL) {
2545 size_t length = java_lang_String::utf8_length(java_string);
2546 /* JNI Specification states return NULL on OOM */
2547 result = AllocateHeap(length + 1, mtInternal, 0, AllocFailStrategy::RETURN_NULL);
2548 if (result != NULL) {
2549 java_lang_String::as_utf8_string(java_string, result, (int) length + 1);
2550 if (isCopy != NULL) {
2551 *isCopy = JNI_TRUE;
2552 }
2553 }
2554 }
2555 HOTSPOT_JNI_GETSTRINGUTFCHARS_RETURN(result);
2556 return result;
2557 JNI_END
2558
2559
2560 JNI_LEAF(void, jni_ReleaseStringUTFChars(JNIEnv *env, jstring str, const char *chars))
2561 JNIWrapper("ReleaseStringUTFChars");
2562 HOTSPOT_JNI_RELEASESTRINGUTFCHARS_ENTRY(env, str, (char *) chars);
2563 if (chars != NULL) {
2564 FreeHeap((char*) chars);
2565 }
2566 HOTSPOT_JNI_RELEASESTRINGUTFCHARS_RETURN();
2567 JNI_END
2568
2569
2570 JNI_QUICK_ENTRY(jsize, jni_GetArrayLength(JNIEnv *env, jarray array))
2571 JNIWrapper("GetArrayLength");
2572 HOTSPOT_JNI_GETARRAYLENGTH_ENTRY(env, array);
2573 arrayOop a = arrayOop(JNIHandles::resolve_non_null(array));
2574 assert(a->is_array(), "must be array");
2575 jsize ret = a->length();
2576 HOTSPOT_JNI_GETARRAYLENGTH_RETURN(ret);
2577 return ret;
2578 JNI_END
2579
2580
2581 //
2582 // Object Array Operations
2583 //
2584
2585 DT_RETURN_MARK_DECL(NewObjectArray, jobjectArray
2586 , HOTSPOT_JNI_NEWOBJECTARRAY_RETURN(_ret_ref));
2587
2588 JNI_ENTRY(jobjectArray, jni_NewObjectArray(JNIEnv *env, jsize length, jclass elementClass, jobject initialElement))
2589 JNIWrapper("NewObjectArray");
2590 HOTSPOT_JNI_NEWOBJECTARRAY_ENTRY(env, length, elementClass, initialElement);
2591 jobjectArray ret = NULL;
2592 DT_RETURN_MARK(NewObjectArray, jobjectArray, (const jobjectArray&)ret);
2593 KlassHandle ek(THREAD, java_lang_Class::as_Klass(JNIHandles::resolve_non_null(elementClass)));
2594 Klass* ako = ek()->array_klass(CHECK_NULL);
2595 KlassHandle ak = KlassHandle(THREAD, ako);
2596 ObjArrayKlass::cast(ak())->initialize(CHECK_NULL);
2597 objArrayOop result = ObjArrayKlass::cast(ak())->allocate(length, CHECK_NULL);
2598 oop initial_value = JNIHandles::resolve(initialElement);
2599 if (initial_value != NULL) { // array already initialized with NULL
2600 for (int index = 0; index < length; index++) {
2601 result->obj_at_put(index, initial_value);
2602 }
2603 }
2604 ret = (jobjectArray) JNIHandles::make_local(env, result);
2605 return ret;
2606 JNI_END
2607
2608 DT_RETURN_MARK_DECL(GetObjectArrayElement, jobject
2609 , HOTSPOT_JNI_GETOBJECTARRAYELEMENT_RETURN(_ret_ref));
2610
2611 JNI_ENTRY(jobject, jni_GetObjectArrayElement(JNIEnv *env, jobjectArray array, jsize index))
2612 JNIWrapper("GetObjectArrayElement");
2613 HOTSPOT_JNI_GETOBJECTARRAYELEMENT_ENTRY(env, array, index);
2614 jobject ret = NULL;
2615 DT_RETURN_MARK(GetObjectArrayElement, jobject, (const jobject&)ret);
2616 objArrayOop a = objArrayOop(JNIHandles::resolve_non_null(array));
2617 if (a->is_within_bounds(index)) {
2618 ret = JNIHandles::make_local(env, a->obj_at(index));
2619 return ret;
2620 } else {
2621 char buf[jintAsStringSize];
2622 sprintf(buf, "%d", index);
2623 THROW_MSG_0(vmSymbols::java_lang_ArrayIndexOutOfBoundsException(), buf);
2624 }
2625 JNI_END
2626
2627 DT_VOID_RETURN_MARK_DECL(SetObjectArrayElement
2628 , HOTSPOT_JNI_SETOBJECTARRAYELEMENT_RETURN());
2629
2630 JNI_ENTRY(void, jni_SetObjectArrayElement(JNIEnv *env, jobjectArray array, jsize index, jobject value))
2631 JNIWrapper("SetObjectArrayElement");
2632 HOTSPOT_JNI_SETOBJECTARRAYELEMENT_ENTRY(env, array, index, value);
2633 DT_VOID_RETURN_MARK(SetObjectArrayElement);
2634
2635 objArrayOop a = objArrayOop(JNIHandles::resolve_non_null(array));
2636 oop v = JNIHandles::resolve(value);
2637 if (a->is_within_bounds(index)) {
2638 if (v == NULL || v->is_a(ObjArrayKlass::cast(a->klass())->element_klass())) {
2639 a->obj_at_put(index, v);
2640 } else {
2641 THROW(vmSymbols::java_lang_ArrayStoreException());
2642 }
2643 } else {
2644 char buf[jintAsStringSize];
2645 sprintf(buf, "%d", index);
2646 THROW_MSG(vmSymbols::java_lang_ArrayIndexOutOfBoundsException(), buf);
2647 }
2648 JNI_END
2649
2650
2651
2652 #define DEFINE_NEWSCALARARRAY(Return,Allocator,Result \
2653 ,EntryProbe,ReturnProbe) \
2654 \
2655 DT_RETURN_MARK_DECL(New##Result##Array, Return \
2656 , ReturnProbe); \
2657 \
2658 JNI_ENTRY(Return, \
2659 jni_New##Result##Array(JNIEnv *env, jsize len)) \
2660 JNIWrapper("New" XSTR(Result) "Array"); \
2661 EntryProbe; \
2662 Return ret = NULL;\
2663 DT_RETURN_MARK(New##Result##Array, Return, (const Return&)ret);\
2664 \
2665 oop obj= oopFactory::Allocator(len, CHECK_0); \
2666 ret = (Return) JNIHandles::make_local(env, obj); \
2667 return ret;\
2668 JNI_END
2669
2670 DEFINE_NEWSCALARARRAY(jbooleanArray, new_boolArray, Boolean,
2671 HOTSPOT_JNI_NEWBOOLEANARRAY_ENTRY(env, len),
2672 HOTSPOT_JNI_NEWBOOLEANARRAY_RETURN(_ret_ref))
2673 DEFINE_NEWSCALARARRAY(jbyteArray, new_byteArray, Byte,
2674 HOTSPOT_JNI_NEWBYTEARRAY_ENTRY(env, len),
2675 HOTSPOT_JNI_NEWBYTEARRAY_RETURN(_ret_ref))
2676 DEFINE_NEWSCALARARRAY(jshortArray, new_shortArray, Short,
2677 HOTSPOT_JNI_NEWSHORTARRAY_ENTRY(env, len),
2678 HOTSPOT_JNI_NEWSHORTARRAY_RETURN(_ret_ref))
2679 DEFINE_NEWSCALARARRAY(jcharArray, new_charArray, Char,
2680 HOTSPOT_JNI_NEWCHARARRAY_ENTRY(env, len),
2681 HOTSPOT_JNI_NEWCHARARRAY_RETURN(_ret_ref))
2682 DEFINE_NEWSCALARARRAY(jintArray, new_intArray, Int,
2683 HOTSPOT_JNI_NEWINTARRAY_ENTRY(env, len),
2684 HOTSPOT_JNI_NEWINTARRAY_RETURN(_ret_ref))
2685 DEFINE_NEWSCALARARRAY(jlongArray, new_longArray, Long,
2686 HOTSPOT_JNI_NEWLONGARRAY_ENTRY(env, len),
2687 HOTSPOT_JNI_NEWLONGARRAY_RETURN(_ret_ref))
2688 DEFINE_NEWSCALARARRAY(jfloatArray, new_singleArray, Float,
2689 HOTSPOT_JNI_NEWFLOATARRAY_ENTRY(env, len),
2690 HOTSPOT_JNI_NEWFLOATARRAY_RETURN(_ret_ref))
2691 DEFINE_NEWSCALARARRAY(jdoubleArray, new_doubleArray, Double,
2692 HOTSPOT_JNI_NEWDOUBLEARRAY_ENTRY(env, len),
2693 HOTSPOT_JNI_NEWDOUBLEARRAY_RETURN(_ret_ref))
2694
2695 // Return an address which will fault if the caller writes to it.
2696
2697 static char* get_bad_address() {
2698 static char* bad_address = NULL;
2699 if (bad_address == NULL) {
2700 size_t size = os::vm_allocation_granularity();
2701 bad_address = os::reserve_memory(size);
2702 if (bad_address != NULL) {
2703 os::protect_memory(bad_address, size, os::MEM_PROT_READ,
2704 /*is_committed*/false);
2705 MemTracker::record_virtual_memory_type((void*)bad_address, mtInternal);
2706 }
2707 }
2708 return bad_address;
2709 }
2710
2711
2712
2713 #define DEFINE_GETSCALARARRAYELEMENTS(ElementTag,ElementType,Result, Tag \
2714 , EntryProbe, ReturnProbe) \
2715 \
2716 JNI_QUICK_ENTRY(ElementType*, \
2717 jni_Get##Result##ArrayElements(JNIEnv *env, ElementType##Array array, jboolean *isCopy)) \
2718 JNIWrapper("Get" XSTR(Result) "ArrayElements"); \
2719 EntryProbe; \
2720 /* allocate an chunk of memory in c land */ \
2721 typeArrayOop a = typeArrayOop(JNIHandles::resolve_non_null(array)); \
2722 ElementType* result; \
2723 int len = a->length(); \
2724 if (len == 0) { \
2725 /* Empty array: legal but useless, can't return NULL. \
2726 * Return a pointer to something useless. \
2727 * Avoid asserts in typeArrayOop. */ \
2728 result = (ElementType*)get_bad_address(); \
2729 } else { \
2730 /* JNI Specification states return NULL on OOM */ \
2731 result = NEW_C_HEAP_ARRAY_RETURN_NULL(ElementType, len, mtInternal); \
2732 if (result != NULL) { \
2733 /* copy the array to the c chunk */ \
2734 memcpy(result, a->Tag##_at_addr(0), sizeof(ElementType)*len); \
2735 if (isCopy) { \
2736 *isCopy = JNI_TRUE; \
2737 } \
2738 } \
2739 } \
2740 ReturnProbe; \
2741 return result; \
2742 JNI_END
2743
2744 DEFINE_GETSCALARARRAYELEMENTS(T_BOOLEAN, jboolean, Boolean, bool
2745 , HOTSPOT_JNI_GETBOOLEANARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy),
2746 HOTSPOT_JNI_GETBOOLEANARRAYELEMENTS_RETURN((uintptr_t*)result))
2747 DEFINE_GETSCALARARRAYELEMENTS(T_BYTE, jbyte, Byte, byte
2748 , HOTSPOT_JNI_GETBYTEARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy),
2749 HOTSPOT_JNI_GETBYTEARRAYELEMENTS_RETURN((char*)result))
2750 DEFINE_GETSCALARARRAYELEMENTS(T_SHORT, jshort, Short, short
2751 , HOTSPOT_JNI_GETSHORTARRAYELEMENTS_ENTRY(env, (uint16_t*) array, (uintptr_t *) isCopy),
2752 HOTSPOT_JNI_GETSHORTARRAYELEMENTS_RETURN((uint16_t*)result))
2753 DEFINE_GETSCALARARRAYELEMENTS(T_CHAR, jchar, Char, char
2754 , HOTSPOT_JNI_GETCHARARRAYELEMENTS_ENTRY(env, (uint16_t*) array, (uintptr_t *) isCopy),
2755 HOTSPOT_JNI_GETCHARARRAYELEMENTS_RETURN(result))
2756 DEFINE_GETSCALARARRAYELEMENTS(T_INT, jint, Int, int
2757 , HOTSPOT_JNI_GETINTARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy),
2758 HOTSPOT_JNI_GETINTARRAYELEMENTS_RETURN((uint32_t*)result))
2759 DEFINE_GETSCALARARRAYELEMENTS(T_LONG, jlong, Long, long
2760 , HOTSPOT_JNI_GETLONGARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy),
2761 HOTSPOT_JNI_GETLONGARRAYELEMENTS_RETURN(((uintptr_t*)result)))
2762 // Float and double probes don't return value because dtrace doesn't currently support it
2763 DEFINE_GETSCALARARRAYELEMENTS(T_FLOAT, jfloat, Float, float
2764 , HOTSPOT_JNI_GETFLOATARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy),
2765 HOTSPOT_JNI_GETFLOATARRAYELEMENTS_RETURN(result))
2766 DEFINE_GETSCALARARRAYELEMENTS(T_DOUBLE, jdouble, Double, double
2767 , HOTSPOT_JNI_GETDOUBLEARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy),
2768 HOTSPOT_JNI_GETDOUBLEARRAYELEMENTS_RETURN(result))
2769
2770
2771 #define DEFINE_RELEASESCALARARRAYELEMENTS(ElementTag,ElementType,Result,Tag \
2772 , EntryProbe, ReturnProbe);\
2773 \
2774 JNI_QUICK_ENTRY(void, \
2775 jni_Release##Result##ArrayElements(JNIEnv *env, ElementType##Array array, \
2776 ElementType *buf, jint mode)) \
2777 JNIWrapper("Release" XSTR(Result) "ArrayElements"); \
2778 EntryProbe; \
2779 typeArrayOop a = typeArrayOop(JNIHandles::resolve_non_null(array)); \
2780 int len = a->length(); \
2781 if (len != 0) { /* Empty array: nothing to free or copy. */ \
2782 if ((mode == 0) || (mode == JNI_COMMIT)) { \
2783 memcpy(a->Tag##_at_addr(0), buf, sizeof(ElementType)*len); \
2784 } \
2785 if ((mode == 0) || (mode == JNI_ABORT)) { \
2786 FreeHeap(buf); \
2787 } \
2788 } \
2789 ReturnProbe; \
2790 JNI_END
2791
2792 DEFINE_RELEASESCALARARRAYELEMENTS(T_BOOLEAN, jboolean, Boolean, bool
2793 , HOTSPOT_JNI_RELEASEBOOLEANARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) buf, mode),
2794 HOTSPOT_JNI_RELEASEBOOLEANARRAYELEMENTS_RETURN())
2795 DEFINE_RELEASESCALARARRAYELEMENTS(T_BYTE, jbyte, Byte, byte
2796 , HOTSPOT_JNI_RELEASEBYTEARRAYELEMENTS_ENTRY(env, array, (char *) buf, mode),
2797 HOTSPOT_JNI_RELEASEBYTEARRAYELEMENTS_RETURN())
2798 DEFINE_RELEASESCALARARRAYELEMENTS(T_SHORT, jshort, Short, short
2799 , HOTSPOT_JNI_RELEASESHORTARRAYELEMENTS_ENTRY(env, array, (uint16_t *) buf, mode),
2800 HOTSPOT_JNI_RELEASESHORTARRAYELEMENTS_RETURN())
2801 DEFINE_RELEASESCALARARRAYELEMENTS(T_CHAR, jchar, Char, char
2802 , HOTSPOT_JNI_RELEASECHARARRAYELEMENTS_ENTRY(env, array, (uint16_t *) buf, mode),
2803 HOTSPOT_JNI_RELEASECHARARRAYELEMENTS_RETURN())
2804 DEFINE_RELEASESCALARARRAYELEMENTS(T_INT, jint, Int, int
2805 , HOTSPOT_JNI_RELEASEINTARRAYELEMENTS_ENTRY(env, array, (uint32_t *) buf, mode),
2806 HOTSPOT_JNI_RELEASEINTARRAYELEMENTS_RETURN())
2807 DEFINE_RELEASESCALARARRAYELEMENTS(T_LONG, jlong, Long, long
2808 , HOTSPOT_JNI_RELEASELONGARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) buf, mode),
2809 HOTSPOT_JNI_RELEASELONGARRAYELEMENTS_RETURN())
2810 DEFINE_RELEASESCALARARRAYELEMENTS(T_FLOAT, jfloat, Float, float
2811 , HOTSPOT_JNI_RELEASEFLOATARRAYELEMENTS_ENTRY(env, array, (float *) buf, mode),
2812 HOTSPOT_JNI_RELEASEFLOATARRAYELEMENTS_RETURN())
2813 DEFINE_RELEASESCALARARRAYELEMENTS(T_DOUBLE, jdouble, Double, double
2814 , HOTSPOT_JNI_RELEASEDOUBLEARRAYELEMENTS_ENTRY(env, array, (double *) buf, mode),
2815 HOTSPOT_JNI_RELEASEDOUBLEARRAYELEMENTS_RETURN())
2816
2817
2818 #define DEFINE_GETSCALARARRAYREGION(ElementTag,ElementType,Result, Tag \
2819 , EntryProbe, ReturnProbe); \
2820 DT_VOID_RETURN_MARK_DECL(Get##Result##ArrayRegion \
2821 , ReturnProbe); \
2822 \
2823 JNI_ENTRY(void, \
2824 jni_Get##Result##ArrayRegion(JNIEnv *env, ElementType##Array array, jsize start, \
2825 jsize len, ElementType *buf)) \
2826 JNIWrapper("Get" XSTR(Result) "ArrayRegion"); \
2827 EntryProbe; \
2828 DT_VOID_RETURN_MARK(Get##Result##ArrayRegion); \
2829 typeArrayOop src = typeArrayOop(JNIHandles::resolve_non_null(array)); \
2830 if (start < 0 || len < 0 || ((unsigned int)start + (unsigned int)len > (unsigned int)src->length())) { \
2831 THROW(vmSymbols::java_lang_ArrayIndexOutOfBoundsException()); \
2832 } else { \
2833 if (len > 0) { \
2834 int sc = TypeArrayKlass::cast(src->klass())->log2_element_size(); \
2835 memcpy((u_char*) buf, \
2836 (u_char*) src->Tag##_at_addr(start), \
2837 len << sc); \
2838 } \
2839 } \
2840 JNI_END
2841
2842 DEFINE_GETSCALARARRAYREGION(T_BOOLEAN, jboolean,Boolean, bool
2843 , HOTSPOT_JNI_GETBOOLEANARRAYREGION_ENTRY(env, array, start, len, (uintptr_t *) buf),
2844 HOTSPOT_JNI_GETBOOLEANARRAYREGION_RETURN());
2845 DEFINE_GETSCALARARRAYREGION(T_BYTE, jbyte, Byte, byte
2846 , HOTSPOT_JNI_GETBYTEARRAYREGION_ENTRY(env, array, start, len, (char *) buf),
2847 HOTSPOT_JNI_GETBYTEARRAYREGION_RETURN());
2848 DEFINE_GETSCALARARRAYREGION(T_SHORT, jshort, Short, short
2849 , HOTSPOT_JNI_GETSHORTARRAYREGION_ENTRY(env, array, start, len, (uint16_t *) buf),
2850 HOTSPOT_JNI_GETSHORTARRAYREGION_RETURN());
2851 DEFINE_GETSCALARARRAYREGION(T_CHAR, jchar, Char, char
2852 , HOTSPOT_JNI_GETCHARARRAYREGION_ENTRY(env, array, start, len, (uint16_t*) buf),
2853 HOTSPOT_JNI_GETCHARARRAYREGION_RETURN());
2854 DEFINE_GETSCALARARRAYREGION(T_INT, jint, Int, int
2855 , HOTSPOT_JNI_GETINTARRAYREGION_ENTRY(env, array, start, len, (uint32_t*) buf),
2856 HOTSPOT_JNI_GETINTARRAYREGION_RETURN());
2857 DEFINE_GETSCALARARRAYREGION(T_LONG, jlong, Long, long
2858 , HOTSPOT_JNI_GETLONGARRAYREGION_ENTRY(env, array, start, len, (uintptr_t *) buf),
2859 HOTSPOT_JNI_GETLONGARRAYREGION_RETURN());
2860 DEFINE_GETSCALARARRAYREGION(T_FLOAT, jfloat, Float, float
2861 , HOTSPOT_JNI_GETFLOATARRAYREGION_ENTRY(env, array, start, len, (float *) buf),
2862 HOTSPOT_JNI_GETFLOATARRAYREGION_RETURN());
2863 DEFINE_GETSCALARARRAYREGION(T_DOUBLE, jdouble, Double, double
2864 , HOTSPOT_JNI_GETDOUBLEARRAYREGION_ENTRY(env, array, start, len, (double *) buf),
2865 HOTSPOT_JNI_GETDOUBLEARRAYREGION_RETURN());
2866
2867
2868 #define DEFINE_SETSCALARARRAYREGION(ElementTag,ElementType,Result, Tag \
2869 , EntryProbe, ReturnProbe); \
2870 DT_VOID_RETURN_MARK_DECL(Set##Result##ArrayRegion \
2871 ,ReturnProbe); \
2872 \
2873 JNI_ENTRY(void, \
2874 jni_Set##Result##ArrayRegion(JNIEnv *env, ElementType##Array array, jsize start, \
2875 jsize len, const ElementType *buf)) \
2876 JNIWrapper("Set" XSTR(Result) "ArrayRegion"); \
2877 EntryProbe; \
2878 DT_VOID_RETURN_MARK(Set##Result##ArrayRegion); \
2879 typeArrayOop dst = typeArrayOop(JNIHandles::resolve_non_null(array)); \
2880 if (start < 0 || len < 0 || ((unsigned int)start + (unsigned int)len > (unsigned int)dst->length())) { \
2881 THROW(vmSymbols::java_lang_ArrayIndexOutOfBoundsException()); \
2882 } else { \
2883 if (len > 0) { \
2884 int sc = TypeArrayKlass::cast(dst->klass())->log2_element_size(); \
2885 memcpy((u_char*) dst->Tag##_at_addr(start), \
2886 (u_char*) buf, \
2887 len << sc); \
2888 } \
2889 } \
2890 JNI_END
2891
2892 DEFINE_SETSCALARARRAYREGION(T_BOOLEAN, jboolean, Boolean, bool
2893 , HOTSPOT_JNI_SETBOOLEANARRAYREGION_ENTRY(env, array, start, len, (uintptr_t *)buf),
2894 HOTSPOT_JNI_SETBOOLEANARRAYREGION_RETURN())
2895 DEFINE_SETSCALARARRAYREGION(T_BYTE, jbyte, Byte, byte
2896 , HOTSPOT_JNI_SETBYTEARRAYREGION_ENTRY(env, array, start, len, (char *) buf),
2897 HOTSPOT_JNI_SETBYTEARRAYREGION_RETURN())
2898 DEFINE_SETSCALARARRAYREGION(T_SHORT, jshort, Short, short
2899 , HOTSPOT_JNI_SETSHORTARRAYREGION_ENTRY(env, array, start, len, (uint16_t *) buf),
2900 HOTSPOT_JNI_SETSHORTARRAYREGION_RETURN())
2901 DEFINE_SETSCALARARRAYREGION(T_CHAR, jchar, Char, char
2902 , HOTSPOT_JNI_SETCHARARRAYREGION_ENTRY(env, array, start, len, (uint16_t *) buf),
2903 HOTSPOT_JNI_SETCHARARRAYREGION_RETURN())
2904 DEFINE_SETSCALARARRAYREGION(T_INT, jint, Int, int
2905 , HOTSPOT_JNI_SETINTARRAYREGION_ENTRY(env, array, start, len, (uint32_t *) buf),
2906 HOTSPOT_JNI_SETINTARRAYREGION_RETURN())
2907 DEFINE_SETSCALARARRAYREGION(T_LONG, jlong, Long, long
2908 , HOTSPOT_JNI_SETLONGARRAYREGION_ENTRY(env, array, start, len, (uintptr_t *) buf),
2909 HOTSPOT_JNI_SETLONGARRAYREGION_RETURN())
2910 DEFINE_SETSCALARARRAYREGION(T_FLOAT, jfloat, Float, float
2911 , HOTSPOT_JNI_SETFLOATARRAYREGION_ENTRY(env, array, start, len, (float *) buf),
2912 HOTSPOT_JNI_SETFLOATARRAYREGION_RETURN())
2913 DEFINE_SETSCALARARRAYREGION(T_DOUBLE, jdouble, Double, double
2914 , HOTSPOT_JNI_SETDOUBLEARRAYREGION_ENTRY(env, array, start, len, (double *) buf),
2915 HOTSPOT_JNI_SETDOUBLEARRAYREGION_RETURN())
2916
2917
2918 //
2919 // Interception of natives
2920 //
2921
2922 // The RegisterNatives call being attempted tried to register with a method that
2923 // is not native. Ask JVM TI what prefixes have been specified. Then check
2924 // to see if the native method is now wrapped with the prefixes. See the
2925 // SetNativeMethodPrefix(es) functions in the JVM TI Spec for details.
2926 static Method* find_prefixed_native(KlassHandle k,
2927 Symbol* name, Symbol* signature, TRAPS) {
2928 #if INCLUDE_JVMTI
2929 ResourceMark rm(THREAD);
2930 Method* method;
2931 int name_len = name->utf8_length();
2932 char* name_str = name->as_utf8();
2933 int prefix_count;
2934 char** prefixes = JvmtiExport::get_all_native_method_prefixes(&prefix_count);
2935 for (int i = 0; i < prefix_count; i++) {
2936 char* prefix = prefixes[i];
2937 int prefix_len = (int)strlen(prefix);
2938
2939 // try adding this prefix to the method name and see if it matches another method name
2940 int trial_len = name_len + prefix_len;
2941 char* trial_name_str = NEW_RESOURCE_ARRAY(char, trial_len + 1);
2942 strcpy(trial_name_str, prefix);
2943 strcat(trial_name_str, name_str);
2944 TempNewSymbol trial_name = SymbolTable::probe(trial_name_str, trial_len);
2945 if (trial_name == NULL) {
2946 continue; // no such symbol, so this prefix wasn't used, try the next prefix
2947 }
2948 method = k()->lookup_method(trial_name, signature);
2949 if (method == NULL) {
2950 continue; // signature doesn't match, try the next prefix
2951 }
2952 if (method->is_native()) {
2953 method->set_is_prefixed_native();
2954 return method; // wahoo, we found a prefixed version of the method, return it
2955 }
2956 // found as non-native, so prefix is good, add it, probably just need more prefixes
2957 name_len = trial_len;
2958 name_str = trial_name_str;
2959 }
2960 #endif // INCLUDE_JVMTI
2961 return NULL; // not found
2962 }
2963
2964 static bool register_native(KlassHandle k, Symbol* name, Symbol* signature, address entry, TRAPS) {
2965 Method* method = k()->lookup_method(name, signature);
2966 if (method == NULL) {
2967 ResourceMark rm;
2968 stringStream st;
2969 st.print("Method %s name or signature does not match",
2970 Method::name_and_sig_as_C_string(k(), name, signature));
2971 THROW_MSG_(vmSymbols::java_lang_NoSuchMethodError(), st.as_string(), false);
2972 }
2973 if (!method->is_native()) {
2974 // trying to register to a non-native method, see if a JVM TI agent has added prefix(es)
2975 method = find_prefixed_native(k, name, signature, THREAD);
2976 if (method == NULL) {
2977 ResourceMark rm;
2978 stringStream st;
2979 st.print("Method %s is not declared as native",
2980 Method::name_and_sig_as_C_string(k(), name, signature));
2981 THROW_MSG_(vmSymbols::java_lang_NoSuchMethodError(), st.as_string(), false);
2982 }
2983 }
2984
2985 if (entry != NULL) {
2986 method->set_native_function(entry,
2987 Method::native_bind_event_is_interesting);
2988 } else {
2989 method->clear_native_function();
2990 }
2991 if (PrintJNIResolving) {
2992 ResourceMark rm(THREAD);
2993 tty->print_cr("[Registering JNI native method %s.%s]",
2994 method->method_holder()->external_name(),
2995 method->name()->as_C_string());
2996 }
2997 return true;
2998 }
2999
3000 DT_RETURN_MARK_DECL(RegisterNatives, jint
3001 , HOTSPOT_JNI_REGISTERNATIVES_RETURN(_ret_ref));
3002
3003 JNI_ENTRY(jint, jni_RegisterNatives(JNIEnv *env, jclass clazz,
3004 const JNINativeMethod *methods,
3005 jint nMethods))
3006 JNIWrapper("RegisterNatives");
3007 HOTSPOT_JNI_REGISTERNATIVES_ENTRY(env, clazz, (void *) methods, nMethods);
3008 jint ret = 0;
3009 DT_RETURN_MARK(RegisterNatives, jint, (const jint&)ret);
3010
3011 KlassHandle h_k(thread, java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz)));
3012
3013 for (int index = 0; index < nMethods; index++) {
3014 const char* meth_name = methods[index].name;
3015 const char* meth_sig = methods[index].signature;
3016 int meth_name_len = (int)strlen(meth_name);
3017
3018 // The class should have been loaded (we have an instance of the class
3019 // passed in) so the method and signature should already be in the symbol
3020 // table. If they're not there, the method doesn't exist.
3021 TempNewSymbol name = SymbolTable::probe(meth_name, meth_name_len);
3022 TempNewSymbol signature = SymbolTable::probe(meth_sig, (int)strlen(meth_sig));
3023
3024 if (name == NULL || signature == NULL) {
3025 ResourceMark rm;
3026 stringStream st;
3027 st.print("Method %s.%s%s not found", h_k()->external_name(), meth_name, meth_sig);
3028 // Must return negative value on failure
3029 THROW_MSG_(vmSymbols::java_lang_NoSuchMethodError(), st.as_string(), -1);
3030 }
3031
3032 bool res = register_native(h_k, name, signature,
3033 (address) methods[index].fnPtr, THREAD);
3034 if (!res) {
3035 ret = -1;
3036 break;
3037 }
3038 }
3039 return ret;
3040 JNI_END
3041
3042
3043 JNI_ENTRY(jint, jni_UnregisterNatives(JNIEnv *env, jclass clazz))
3044 JNIWrapper("UnregisterNatives");
3045 HOTSPOT_JNI_UNREGISTERNATIVES_ENTRY(env, clazz);
3046 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz));
3047 //%note jni_2
3048 if (k->oop_is_instance()) {
3049 for (int index = 0; index < InstanceKlass::cast(k)->methods()->length(); index++) {
3050 Method* m = InstanceKlass::cast(k)->methods()->at(index);
3051 if (m->is_native()) {
3052 m->clear_native_function();
3053 m->set_signature_handler(NULL);
3054 }
3055 }
3056 }
3057 HOTSPOT_JNI_UNREGISTERNATIVES_RETURN(0);
3058 return 0;
3059 JNI_END
3060
3061 //
3062 // Monitor functions
3063 //
3064
3065 DT_RETURN_MARK_DECL(MonitorEnter, jint
3066 , HOTSPOT_JNI_MONITORENTER_RETURN(_ret_ref));
3067
3068 JNI_ENTRY(jint, jni_MonitorEnter(JNIEnv *env, jobject jobj))
3069 HOTSPOT_JNI_MONITORENTER_ENTRY(env, jobj);
3070 jint ret = JNI_ERR;
3071 DT_RETURN_MARK(MonitorEnter, jint, (const jint&)ret);
3072
3073 // If the object is null, we can't do anything with it
3074 if (jobj == NULL) {
3075 THROW_(vmSymbols::java_lang_NullPointerException(), JNI_ERR);
3076 }
3077
3078 Handle obj(thread, JNIHandles::resolve_non_null(jobj));
3079 ObjectSynchronizer::jni_enter(obj, CHECK_(JNI_ERR));
3080 ret = JNI_OK;
3081 return ret;
3082 JNI_END
3083
3084 DT_RETURN_MARK_DECL(MonitorExit, jint
3085 , HOTSPOT_JNI_MONITOREXIT_RETURN(_ret_ref));
3086
3087 JNI_ENTRY(jint, jni_MonitorExit(JNIEnv *env, jobject jobj))
3088 HOTSPOT_JNI_MONITOREXIT_ENTRY(env, jobj);
3089 jint ret = JNI_ERR;
3090 DT_RETURN_MARK(MonitorExit, jint, (const jint&)ret);
3091
3092 // Don't do anything with a null object
3093 if (jobj == NULL) {
3094 THROW_(vmSymbols::java_lang_NullPointerException(), JNI_ERR);
3095 }
3096
3097 Handle obj(THREAD, JNIHandles::resolve_non_null(jobj));
3098 ObjectSynchronizer::jni_exit(obj(), CHECK_(JNI_ERR));
3099
3100 ret = JNI_OK;
3101 return ret;
3102 JNI_END
3103
3104 //
3105 // Extensions
3106 //
3107
3108 DT_VOID_RETURN_MARK_DECL(GetStringRegion
3109 , HOTSPOT_JNI_GETSTRINGREGION_RETURN());
3110
3111 JNI_ENTRY(void, jni_GetStringRegion(JNIEnv *env, jstring string, jsize start, jsize len, jchar *buf))
3112 JNIWrapper("GetStringRegion");
3113 HOTSPOT_JNI_GETSTRINGREGION_ENTRY(env, string, start, len, buf);
3114 DT_VOID_RETURN_MARK(GetStringRegion);
3115 oop s = JNIHandles::resolve_non_null(string);
3116 int s_len = java_lang_String::length(s);
3117 if (start < 0 || len < 0 || start + len > s_len) {
3118 THROW(vmSymbols::java_lang_StringIndexOutOfBoundsException());
3119 } else {
3120 if (len > 0) {
3121 int s_offset = java_lang_String::offset(s);
3122 typeArrayOop s_value = java_lang_String::value(s);
3123 memcpy(buf, s_value->char_at_addr(s_offset+start), sizeof(jchar)*len);
3124 }
3125 }
3126 JNI_END
3127
3128 DT_VOID_RETURN_MARK_DECL(GetStringUTFRegion
3129 , HOTSPOT_JNI_GETSTRINGUTFREGION_RETURN());
3130
3131 JNI_ENTRY(void, jni_GetStringUTFRegion(JNIEnv *env, jstring string, jsize start, jsize len, char *buf))
3132 JNIWrapper("GetStringUTFRegion");
3133 HOTSPOT_JNI_GETSTRINGUTFREGION_ENTRY(env, string, start, len, buf);
3134 DT_VOID_RETURN_MARK(GetStringUTFRegion);
3135 oop s = JNIHandles::resolve_non_null(string);
3136 int s_len = java_lang_String::length(s);
3137 if (start < 0 || len < 0 || start + len > s_len) {
3138 THROW(vmSymbols::java_lang_StringIndexOutOfBoundsException());
3139 } else {
3140 //%note jni_7
3141 if (len > 0) {
3142 // Assume the buffer is large enough as the JNI spec. does not require user error checking
3143 java_lang_String::as_utf8_string(s, start, len, buf, INT_MAX);
3144 // as_utf8_string null-terminates the result string
3145 } else {
3146 // JDK null-terminates the buffer even in len is zero
3147 if (buf != NULL) {
3148 buf[0] = 0;
3149 }
3150 }
3151 }
3152 JNI_END
3153
3154
3155 JNI_ENTRY(void*, jni_GetPrimitiveArrayCritical(JNIEnv *env, jarray array, jboolean *isCopy))
3156 JNIWrapper("GetPrimitiveArrayCritical");
3157 HOTSPOT_JNI_GETPRIMITIVEARRAYCRITICAL_ENTRY(env, array, (uintptr_t *) isCopy);
3158 GC_locker::lock_critical(thread);
3159 if (isCopy != NULL) {
3160 *isCopy = JNI_FALSE;
3161 }
3162 oop a = JNIHandles::resolve_non_null(array);
3163 assert(a->is_array(), "just checking");
3164 BasicType type;
3165 if (a->is_objArray()) {
3166 type = T_OBJECT;
3167 } else {
3168 type = TypeArrayKlass::cast(a->klass())->element_type();
3169 }
3170 void* ret = arrayOop(a)->base(type);
3171 HOTSPOT_JNI_GETPRIMITIVEARRAYCRITICAL_RETURN(ret);
3172 return ret;
3173 JNI_END
3174
3175
3176 JNI_ENTRY(void, jni_ReleasePrimitiveArrayCritical(JNIEnv *env, jarray array, void *carray, jint mode))
3177 JNIWrapper("ReleasePrimitiveArrayCritical");
3178 HOTSPOT_JNI_RELEASEPRIMITIVEARRAYCRITICAL_ENTRY(env, array, carray, mode);
3179 // The array, carray and mode arguments are ignored
3180 GC_locker::unlock_critical(thread);
3181 HOTSPOT_JNI_RELEASEPRIMITIVEARRAYCRITICAL_RETURN();
3182 JNI_END
3183
3184
3185 JNI_ENTRY(const jchar*, jni_GetStringCritical(JNIEnv *env, jstring string, jboolean *isCopy))
3186 JNIWrapper("GetStringCritical");
3187 HOTSPOT_JNI_GETSTRINGCRITICAL_ENTRY(env, string, (uintptr_t *) isCopy);
3188 GC_locker::lock_critical(thread);
3189 if (isCopy != NULL) {
3190 *isCopy = JNI_FALSE;
3191 }
3192 oop s = JNIHandles::resolve_non_null(string);
3193 int s_len = java_lang_String::length(s);
3194 typeArrayOop s_value = java_lang_String::value(s);
3195 int s_offset = java_lang_String::offset(s);
3196 const jchar* ret;
3197 if (s_len > 0) {
3198 ret = s_value->char_at_addr(s_offset);
3199 } else {
3200 ret = (jchar*) s_value->base(T_CHAR);
3201 }
3202 HOTSPOT_JNI_GETSTRINGCRITICAL_RETURN((uint16_t *) ret);
3203 return ret;
3204 JNI_END
3205
3206
3207 JNI_ENTRY(void, jni_ReleaseStringCritical(JNIEnv *env, jstring str, const jchar *chars))
3208 JNIWrapper("ReleaseStringCritical");
3209 HOTSPOT_JNI_RELEASESTRINGCRITICAL_ENTRY(env, str, (uint16_t *) chars);
3210 // The str and chars arguments are ignored
3211 GC_locker::unlock_critical(thread);
3212 HOTSPOT_JNI_RELEASESTRINGCRITICAL_RETURN();
3213 JNI_END
3214
3215
3216 JNI_ENTRY(jweak, jni_NewWeakGlobalRef(JNIEnv *env, jobject ref))
3217 JNIWrapper("jni_NewWeakGlobalRef");
3218 HOTSPOT_JNI_NEWWEAKGLOBALREF_ENTRY(env, ref);
3219 Handle ref_handle(thread, JNIHandles::resolve(ref));
3220 jweak ret = JNIHandles::make_weak_global(ref_handle);
3221 HOTSPOT_JNI_NEWWEAKGLOBALREF_RETURN(ret);
3222 return ret;
3223 JNI_END
3224
3225 // Must be JNI_ENTRY (with HandleMark)
3226 JNI_ENTRY(void, jni_DeleteWeakGlobalRef(JNIEnv *env, jweak ref))
3227 JNIWrapper("jni_DeleteWeakGlobalRef");
3228 HOTSPOT_JNI_DELETEWEAKGLOBALREF_ENTRY(env, ref);
3229 JNIHandles::destroy_weak_global(ref);
3230 HOTSPOT_JNI_DELETEWEAKGLOBALREF_RETURN();
3231 JNI_END
3232
3233
3234 JNI_QUICK_ENTRY(jboolean, jni_ExceptionCheck(JNIEnv *env))
3235 JNIWrapper("jni_ExceptionCheck");
3236 HOTSPOT_JNI_EXCEPTIONCHECK_ENTRY(env);
3237 jni_check_async_exceptions(thread);
3238 jboolean ret = (thread->has_pending_exception()) ? JNI_TRUE : JNI_FALSE;
3239 HOTSPOT_JNI_EXCEPTIONCHECK_RETURN(ret);
3240 return ret;
3241 JNI_END
3242
3243
3244 // Initialization state for three routines below relating to
3245 // java.nio.DirectBuffers
3246 static jint directBufferSupportInitializeStarted = 0;
3247 static volatile jint directBufferSupportInitializeEnded = 0;
3248 static volatile jint directBufferSupportInitializeFailed = 0;
3249 static jclass bufferClass = NULL;
3250 static jclass directBufferClass = NULL;
3251 static jclass directByteBufferClass = NULL;
3252 static jmethodID directByteBufferConstructor = NULL;
3253 static jfieldID directBufferAddressField = NULL;
3254 static jfieldID bufferCapacityField = NULL;
3255
3256 static jclass lookupOne(JNIEnv* env, const char* name, TRAPS) {
3257 Handle loader; // null (bootstrap) loader
3258 Handle protection_domain; // null protection domain
3259
3260 TempNewSymbol sym = SymbolTable::new_symbol(name, CHECK_NULL);
3261 jclass result = find_class_from_class_loader(env, sym, true, loader, protection_domain, true, CHECK_NULL);
3262
3263 if (TraceClassResolution && result != NULL) {
3264 trace_class_resolution(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(result)));
3265 }
3266 return result;
3267 }
3268
3269 // These lookups are done with the NULL (bootstrap) ClassLoader to
3270 // circumvent any security checks that would be done by jni_FindClass.
3271 JNI_ENTRY(bool, lookupDirectBufferClasses(JNIEnv* env))
3272 {
3273 if ((bufferClass = lookupOne(env, "java/nio/Buffer", thread)) == NULL) { return false; }
3274 if ((directBufferClass = lookupOne(env, "sun/nio/ch/DirectBuffer", thread)) == NULL) { return false; }
3275 if ((directByteBufferClass = lookupOne(env, "java/nio/DirectByteBuffer", thread)) == NULL) { return false; }
3276 return true;
3277 }
3278 JNI_END
3279
3280
3281 static bool initializeDirectBufferSupport(JNIEnv* env, JavaThread* thread) {
3282 if (directBufferSupportInitializeFailed) {
3283 return false;
3284 }
3285
3286 if (Atomic::cmpxchg(1, &directBufferSupportInitializeStarted, 0) == 0) {
3287 if (!lookupDirectBufferClasses(env)) {
3288 directBufferSupportInitializeFailed = 1;
3289 return false;
3290 }
3291
3292 // Make global references for these
3293 bufferClass = (jclass) env->NewGlobalRef(bufferClass);
3294 directBufferClass = (jclass) env->NewGlobalRef(directBufferClass);
3295 directByteBufferClass = (jclass) env->NewGlobalRef(directByteBufferClass);
3296
3297 // Get needed field and method IDs
3298 directByteBufferConstructor = env->GetMethodID(directByteBufferClass, "<init>", "(JI)V");
3299 if (env->ExceptionCheck()) {
3300 env->ExceptionClear();
3301 directBufferSupportInitializeFailed = 1;
3302 return false;
3303 }
3304 directBufferAddressField = env->GetFieldID(bufferClass, "address", "J");
3305 if (env->ExceptionCheck()) {
3306 env->ExceptionClear();
3307 directBufferSupportInitializeFailed = 1;
3308 return false;
3309 }
3310 bufferCapacityField = env->GetFieldID(bufferClass, "capacity", "I");
3311 if (env->ExceptionCheck()) {
3312 env->ExceptionClear();
3313 directBufferSupportInitializeFailed = 1;
3314 return false;
3315 }
3316
3317 if ((directByteBufferConstructor == NULL) ||
3318 (directBufferAddressField == NULL) ||
3319 (bufferCapacityField == NULL)) {
3320 directBufferSupportInitializeFailed = 1;
3321 return false;
3322 }
3323
3324 directBufferSupportInitializeEnded = 1;
3325 } else {
3326 while (!directBufferSupportInitializeEnded && !directBufferSupportInitializeFailed) {
3327 os::naked_yield();
3328 }
3329 }
3330
3331 return !directBufferSupportInitializeFailed;
3332 }
3333
3334 extern "C" jobject JNICALL jni_NewDirectByteBuffer(JNIEnv *env, void* address, jlong capacity)
3335 {
3336 // thread_from_jni_environment() will block if VM is gone.
3337 JavaThread* thread = JavaThread::thread_from_jni_environment(env);
3338
3339 JNIWrapper("jni_NewDirectByteBuffer");
3340 HOTSPOT_JNI_NEWDIRECTBYTEBUFFER_ENTRY(env, address, capacity);
3341
3342 if (!directBufferSupportInitializeEnded) {
3343 if (!initializeDirectBufferSupport(env, thread)) {
3344 HOTSPOT_JNI_NEWDIRECTBYTEBUFFER_RETURN(NULL);
3345 return NULL;
3346 }
3347 }
3348
3349 // Being paranoid about accidental sign extension on address
3350 jlong addr = (jlong) ((uintptr_t) address);
3351 // NOTE that package-private DirectByteBuffer constructor currently
3352 // takes int capacity
3353 jint cap = (jint) capacity;
3354 jobject ret = env->NewObject(directByteBufferClass, directByteBufferConstructor, addr, cap);
3355 HOTSPOT_JNI_NEWDIRECTBYTEBUFFER_RETURN(ret);
3356 return ret;
3357 }
3358
3359 DT_RETURN_MARK_DECL(GetDirectBufferAddress, void*
3360 , HOTSPOT_JNI_GETDIRECTBUFFERADDRESS_RETURN((void*) _ret_ref));
3361
3362 extern "C" void* JNICALL jni_GetDirectBufferAddress(JNIEnv *env, jobject buf)
3363 {
3364 // thread_from_jni_environment() will block if VM is gone.
3365 JavaThread* thread = JavaThread::thread_from_jni_environment(env);
3366
3367 JNIWrapper("jni_GetDirectBufferAddress");
3368 HOTSPOT_JNI_GETDIRECTBUFFERADDRESS_ENTRY(env, buf);
3369 void* ret = NULL;
3370 DT_RETURN_MARK(GetDirectBufferAddress, void*, (const void*&)ret);
3371
3372 if (!directBufferSupportInitializeEnded) {
3373 if (!initializeDirectBufferSupport(env, thread)) {
3374 return 0;
3375 }
3376 }
3377
3378 if ((buf != NULL) && (!env->IsInstanceOf(buf, directBufferClass))) {
3379 return 0;
3380 }
3381
3382 ret = (void*)(intptr_t)env->GetLongField(buf, directBufferAddressField);
3383 return ret;
3384 }
3385
3386 DT_RETURN_MARK_DECL(GetDirectBufferCapacity, jlong
3387 , HOTSPOT_JNI_GETDIRECTBUFFERCAPACITY_RETURN(_ret_ref));
3388
3389 extern "C" jlong JNICALL jni_GetDirectBufferCapacity(JNIEnv *env, jobject buf)
3390 {
3391 // thread_from_jni_environment() will block if VM is gone.
3392 JavaThread* thread = JavaThread::thread_from_jni_environment(env);
3393
3394 JNIWrapper("jni_GetDirectBufferCapacity");
3395 HOTSPOT_JNI_GETDIRECTBUFFERCAPACITY_ENTRY(env, buf);
3396 jlong ret = -1;
3397 DT_RETURN_MARK(GetDirectBufferCapacity, jlong, (const jlong&)ret);
3398
3399 if (!directBufferSupportInitializeEnded) {
3400 if (!initializeDirectBufferSupport(env, thread)) {
3401 ret = 0;
3402 return ret;
3403 }
3404 }
3405
3406 if (buf == NULL) {
3407 return -1;
3408 }
3409
3410 if (!env->IsInstanceOf(buf, directBufferClass)) {
3411 return -1;
3412 }
3413
3414 // NOTE that capacity is currently an int in the implementation
3415 ret = env->GetIntField(buf, bufferCapacityField);
3416 return ret;
3417 }
3418
3419
3420 JNI_LEAF(jint, jni_GetVersion(JNIEnv *env))
3421 JNIWrapper("GetVersion");
3422 HOTSPOT_JNI_GETVERSION_ENTRY(env);
3423 HOTSPOT_JNI_GETVERSION_RETURN(CurrentVersion);
3424 return CurrentVersion;
3425 JNI_END
3426
3427 extern struct JavaVM_ main_vm;
3428
3429 JNI_LEAF(jint, jni_GetJavaVM(JNIEnv *env, JavaVM **vm))
3430 JNIWrapper("jni_GetJavaVM");
3431 HOTSPOT_JNI_GETJAVAVM_ENTRY(env, (void **) vm);
3432 *vm = (JavaVM *)(&main_vm);
3433 HOTSPOT_JNI_GETJAVAVM_RETURN(JNI_OK);
3434 return JNI_OK;
3435 JNI_END
3436
3437 // Structure containing all jni functions
3438 struct JNINativeInterface_ jni_NativeInterface = {
3439 NULL,
3440 NULL,
3441 NULL,
3442
3443 NULL,
3444
3445 jni_GetVersion,
3446
3447 jni_DefineClass,
3448 jni_FindClass,
3449
3450 jni_FromReflectedMethod,
3451 jni_FromReflectedField,
3452
3453 jni_ToReflectedMethod,
3454
3455 jni_GetSuperclass,
3456 jni_IsAssignableFrom,
3457
3458 jni_ToReflectedField,
3459
3460 jni_Throw,
3461 jni_ThrowNew,
3462 jni_ExceptionOccurred,
3463 jni_ExceptionDescribe,
3464 jni_ExceptionClear,
3465 jni_FatalError,
3466
3467 jni_PushLocalFrame,
3468 jni_PopLocalFrame,
3469
3470 jni_NewGlobalRef,
3471 jni_DeleteGlobalRef,
3472 jni_DeleteLocalRef,
3473 jni_IsSameObject,
3474
3475 jni_NewLocalRef,
3476 jni_EnsureLocalCapacity,
3477
3478 jni_AllocObject,
3479 jni_NewObject,
3480 jni_NewObjectV,
3481 jni_NewObjectA,
3482
3483 jni_GetObjectClass,
3484 jni_IsInstanceOf,
3485
3486 jni_GetMethodID,
3487
3488 jni_CallObjectMethod,
3489 jni_CallObjectMethodV,
3490 jni_CallObjectMethodA,
3491 jni_CallBooleanMethod,
3492 jni_CallBooleanMethodV,
3493 jni_CallBooleanMethodA,
3494 jni_CallByteMethod,
3495 jni_CallByteMethodV,
3496 jni_CallByteMethodA,
3497 jni_CallCharMethod,
3498 jni_CallCharMethodV,
3499 jni_CallCharMethodA,
3500 jni_CallShortMethod,
3501 jni_CallShortMethodV,
3502 jni_CallShortMethodA,
3503 jni_CallIntMethod,
3504 jni_CallIntMethodV,
3505 jni_CallIntMethodA,
3506 jni_CallLongMethod,
3507 jni_CallLongMethodV,
3508 jni_CallLongMethodA,
3509 jni_CallFloatMethod,
3510 jni_CallFloatMethodV,
3511 jni_CallFloatMethodA,
3512 jni_CallDoubleMethod,
3513 jni_CallDoubleMethodV,
3514 jni_CallDoubleMethodA,
3515 jni_CallVoidMethod,
3516 jni_CallVoidMethodV,
3517 jni_CallVoidMethodA,
3518
3519 jni_CallNonvirtualObjectMethod,
3520 jni_CallNonvirtualObjectMethodV,
3521 jni_CallNonvirtualObjectMethodA,
3522 jni_CallNonvirtualBooleanMethod,
3523 jni_CallNonvirtualBooleanMethodV,
3524 jni_CallNonvirtualBooleanMethodA,
3525 jni_CallNonvirtualByteMethod,
3526 jni_CallNonvirtualByteMethodV,
3527 jni_CallNonvirtualByteMethodA,
3528 jni_CallNonvirtualCharMethod,
3529 jni_CallNonvirtualCharMethodV,
3530 jni_CallNonvirtualCharMethodA,
3531 jni_CallNonvirtualShortMethod,
3532 jni_CallNonvirtualShortMethodV,
3533 jni_CallNonvirtualShortMethodA,
3534 jni_CallNonvirtualIntMethod,
3535 jni_CallNonvirtualIntMethodV,
3536 jni_CallNonvirtualIntMethodA,
3537 jni_CallNonvirtualLongMethod,
3538 jni_CallNonvirtualLongMethodV,
3539 jni_CallNonvirtualLongMethodA,
3540 jni_CallNonvirtualFloatMethod,
3541 jni_CallNonvirtualFloatMethodV,
3542 jni_CallNonvirtualFloatMethodA,
3543 jni_CallNonvirtualDoubleMethod,
3544 jni_CallNonvirtualDoubleMethodV,
3545 jni_CallNonvirtualDoubleMethodA,
3546 jni_CallNonvirtualVoidMethod,
3547 jni_CallNonvirtualVoidMethodV,
3548 jni_CallNonvirtualVoidMethodA,
3549
3550 jni_GetFieldID,
3551
3552 jni_GetObjectField,
3553 jni_GetBooleanField,
3554 jni_GetByteField,
3555 jni_GetCharField,
3556 jni_GetShortField,
3557 jni_GetIntField,
3558 jni_GetLongField,
3559 jni_GetFloatField,
3560 jni_GetDoubleField,
3561
3562 jni_SetObjectField,
3563 jni_SetBooleanField,
3564 jni_SetByteField,
3565 jni_SetCharField,
3566 jni_SetShortField,
3567 jni_SetIntField,
3568 jni_SetLongField,
3569 jni_SetFloatField,
3570 jni_SetDoubleField,
3571
3572 jni_GetStaticMethodID,
3573
3574 jni_CallStaticObjectMethod,
3575 jni_CallStaticObjectMethodV,
3576 jni_CallStaticObjectMethodA,
3577 jni_CallStaticBooleanMethod,
3578 jni_CallStaticBooleanMethodV,
3579 jni_CallStaticBooleanMethodA,
3580 jni_CallStaticByteMethod,
3581 jni_CallStaticByteMethodV,
3582 jni_CallStaticByteMethodA,
3583 jni_CallStaticCharMethod,
3584 jni_CallStaticCharMethodV,
3585 jni_CallStaticCharMethodA,
3586 jni_CallStaticShortMethod,
3587 jni_CallStaticShortMethodV,
3588 jni_CallStaticShortMethodA,
3589 jni_CallStaticIntMethod,
3590 jni_CallStaticIntMethodV,
3591 jni_CallStaticIntMethodA,
3592 jni_CallStaticLongMethod,
3593 jni_CallStaticLongMethodV,
3594 jni_CallStaticLongMethodA,
3595 jni_CallStaticFloatMethod,
3596 jni_CallStaticFloatMethodV,
3597 jni_CallStaticFloatMethodA,
3598 jni_CallStaticDoubleMethod,
3599 jni_CallStaticDoubleMethodV,
3600 jni_CallStaticDoubleMethodA,
3601 jni_CallStaticVoidMethod,
3602 jni_CallStaticVoidMethodV,
3603 jni_CallStaticVoidMethodA,
3604
3605 jni_GetStaticFieldID,
3606
3607 jni_GetStaticObjectField,
3608 jni_GetStaticBooleanField,
3609 jni_GetStaticByteField,
3610 jni_GetStaticCharField,
3611 jni_GetStaticShortField,
3612 jni_GetStaticIntField,
3613 jni_GetStaticLongField,
3614 jni_GetStaticFloatField,
3615 jni_GetStaticDoubleField,
3616
3617 jni_SetStaticObjectField,
3618 jni_SetStaticBooleanField,
3619 jni_SetStaticByteField,
3620 jni_SetStaticCharField,
3621 jni_SetStaticShortField,
3622 jni_SetStaticIntField,
3623 jni_SetStaticLongField,
3624 jni_SetStaticFloatField,
3625 jni_SetStaticDoubleField,
3626
3627 jni_NewString,
3628 jni_GetStringLength,
3629 jni_GetStringChars,
3630 jni_ReleaseStringChars,
3631
3632 jni_NewStringUTF,
3633 jni_GetStringUTFLength,
3634 jni_GetStringUTFChars,
3635 jni_ReleaseStringUTFChars,
3636
3637 jni_GetArrayLength,
3638
3639 jni_NewObjectArray,
3640 jni_GetObjectArrayElement,
3641 jni_SetObjectArrayElement,
3642
3643 jni_NewBooleanArray,
3644 jni_NewByteArray,
3645 jni_NewCharArray,
3646 jni_NewShortArray,
3647 jni_NewIntArray,
3648 jni_NewLongArray,
3649 jni_NewFloatArray,
3650 jni_NewDoubleArray,
3651
3652 jni_GetBooleanArrayElements,
3653 jni_GetByteArrayElements,
3654 jni_GetCharArrayElements,
3655 jni_GetShortArrayElements,
3656 jni_GetIntArrayElements,
3657 jni_GetLongArrayElements,
3658 jni_GetFloatArrayElements,
3659 jni_GetDoubleArrayElements,
3660
3661 jni_ReleaseBooleanArrayElements,
3662 jni_ReleaseByteArrayElements,
3663 jni_ReleaseCharArrayElements,
3664 jni_ReleaseShortArrayElements,
3665 jni_ReleaseIntArrayElements,
3666 jni_ReleaseLongArrayElements,
3667 jni_ReleaseFloatArrayElements,
3668 jni_ReleaseDoubleArrayElements,
3669
3670 jni_GetBooleanArrayRegion,
3671 jni_GetByteArrayRegion,
3672 jni_GetCharArrayRegion,
3673 jni_GetShortArrayRegion,
3674 jni_GetIntArrayRegion,
3675 jni_GetLongArrayRegion,
3676 jni_GetFloatArrayRegion,
3677 jni_GetDoubleArrayRegion,
3678
3679 jni_SetBooleanArrayRegion,
3680 jni_SetByteArrayRegion,
3681 jni_SetCharArrayRegion,
3682 jni_SetShortArrayRegion,
3683 jni_SetIntArrayRegion,
3684 jni_SetLongArrayRegion,
3685 jni_SetFloatArrayRegion,
3686 jni_SetDoubleArrayRegion,
3687
3688 jni_RegisterNatives,
3689 jni_UnregisterNatives,
3690
3691 jni_MonitorEnter,
3692 jni_MonitorExit,
3693
3694 jni_GetJavaVM,
3695
3696 jni_GetStringRegion,
3697 jni_GetStringUTFRegion,
3698
3699 jni_GetPrimitiveArrayCritical,
3700 jni_ReleasePrimitiveArrayCritical,
3701
3702 jni_GetStringCritical,
3703 jni_ReleaseStringCritical,
3704
3705 jni_NewWeakGlobalRef,
3706 jni_DeleteWeakGlobalRef,
3707
3708 jni_ExceptionCheck,
3709
3710 jni_NewDirectByteBuffer,
3711 jni_GetDirectBufferAddress,
3712 jni_GetDirectBufferCapacity,
3713
3714 // New 1_6 features
3715
3716 jni_GetObjectRefType
3717 };
3718
3719
3720 // For jvmti use to modify jni function table.
3721 // Java threads in native contiues to run until it is transitioned
3722 // to VM at safepoint. Before the transition or before it is blocked
3723 // for safepoint it may access jni function table. VM could crash if
3724 // any java thread access the jni function table in the middle of memcpy.
3725 // To avoid this each function pointers are copied automically.
3726 void copy_jni_function_table(const struct JNINativeInterface_ *new_jni_NativeInterface) {
3727 assert(SafepointSynchronize::is_at_safepoint(), "must be at safepoint");
3728 intptr_t *a = (intptr_t *) jni_functions();
3729 intptr_t *b = (intptr_t *) new_jni_NativeInterface;
3730 for (uint i=0; i < sizeof(struct JNINativeInterface_)/sizeof(void *); i++) {
3731 Atomic::store_ptr(*b++, a++);
3732 }
3733 }
3734
3735 void quicken_jni_functions() {
3736 // Replace Get<Primitive>Field with fast versions
3737 if (UseFastJNIAccessors && !JvmtiExport::can_post_field_access()
3738 && !VerifyJNIFields && !TraceJNICalls && !CountJNICalls && !CheckJNICalls
3739 #if defined(_WINDOWS) && defined(IA32) && defined(COMPILER2)
3740 // windows x86 currently needs SEH wrapper and the gain of the fast
3741 // versions currently isn't certain for server vm on uniprocessor.
3742 && os::is_MP()
3743 #endif
3744 ) {
3745 address func;
3746 func = JNI_FastGetField::generate_fast_get_boolean_field();
3747 if (func != (address)-1) {
3748 jni_NativeInterface.GetBooleanField = (GetBooleanField_t)func;
3749 }
3750 func = JNI_FastGetField::generate_fast_get_byte_field();
3751 if (func != (address)-1) {
3752 jni_NativeInterface.GetByteField = (GetByteField_t)func;
3753 }
3754 func = JNI_FastGetField::generate_fast_get_char_field();
3755 if (func != (address)-1) {
3756 jni_NativeInterface.GetCharField = (GetCharField_t)func;
3757 }
3758 func = JNI_FastGetField::generate_fast_get_short_field();
3759 if (func != (address)-1) {
3760 jni_NativeInterface.GetShortField = (GetShortField_t)func;
3761 }
3762 func = JNI_FastGetField::generate_fast_get_int_field();
3763 if (func != (address)-1) {
3764 jni_NativeInterface.GetIntField = (GetIntField_t)func;
3765 }
3766 func = JNI_FastGetField::generate_fast_get_long_field();
3767 if (func != (address)-1) {
3768 jni_NativeInterface.GetLongField = (GetLongField_t)func;
3769 }
3770 func = JNI_FastGetField::generate_fast_get_float_field();
3771 if (func != (address)-1) {
3772 jni_NativeInterface.GetFloatField = (GetFloatField_t)func;
3773 }
3774 func = JNI_FastGetField::generate_fast_get_double_field();
3775 if (func != (address)-1) {
3776 jni_NativeInterface.GetDoubleField = (GetDoubleField_t)func;
3777 }
3778 }
3779 }
3780
3781 // Returns the function structure
3782 struct JNINativeInterface_* jni_functions() {
3783 #if INCLUDE_JNI_CHECK
3784 if (CheckJNICalls) return jni_functions_check();
3785 #endif // INCLUDE_JNI_CHECK
3786 return &jni_NativeInterface;
3787 }
3788
3789 // Returns the function structure
3790 struct JNINativeInterface_* jni_functions_nocheck() {
3791 return &jni_NativeInterface;
3792 }
3793
3794
3795 // Invocation API
3796
3797
3798 // Forward declaration
3799 extern const struct JNIInvokeInterface_ jni_InvokeInterface;
3800
3801 // Global invocation API vars
3802 volatile jint vm_created = 0;
3803 // Indicate whether it is safe to recreate VM
3804 volatile jint safe_to_recreate_vm = 1;
3805 struct JavaVM_ main_vm = {&jni_InvokeInterface};
3806
3807
3808 #define JAVASTACKSIZE (400 * 1024) /* Default size of a thread java stack */
3809 enum { VERIFY_NONE, VERIFY_REMOTE, VERIFY_ALL };
3810
3811 DT_RETURN_MARK_DECL(GetDefaultJavaVMInitArgs, jint
3812 , HOTSPOT_JNI_GETDEFAULTJAVAVMINITARGS_RETURN(_ret_ref));
3813
3814 _JNI_IMPORT_OR_EXPORT_ jint JNICALL JNI_GetDefaultJavaVMInitArgs(void *args_) {
3815 HOTSPOT_JNI_GETDEFAULTJAVAVMINITARGS_ENTRY(args_);
3816 JDK1_1InitArgs *args = (JDK1_1InitArgs *)args_;
3817 jint ret = JNI_ERR;
3818 DT_RETURN_MARK(GetDefaultJavaVMInitArgs, jint, (const jint&)ret);
3819
3820 if (Threads::is_supported_jni_version(args->version)) {
3821 ret = JNI_OK;
3822 }
3823 // 1.1 style no longer supported in hotspot.
3824 // According the JNI spec, we should update args->version on return.
3825 // We also use the structure to communicate with launcher about default
3826 // stack size.
3827 if (args->version == JNI_VERSION_1_1) {
3828 args->version = JNI_VERSION_1_2;
3829 // javaStackSize is int in arguments structure
3830 assert(jlong(ThreadStackSize) * K < INT_MAX, "integer overflow");
3831 args->javaStackSize = (jint)(ThreadStackSize * K);
3832 }
3833 return ret;
3834 }
3835
3836 #ifndef PRODUCT
3837
3838 #include "gc_implementation/shared/gcTimer.hpp"
3839 #include "gc_interface/collectedHeap.hpp"
3840 #if INCLUDE_ALL_GCS
3841 #include "gc_implementation/g1/heapRegionRemSet.hpp"
3842 #endif
3843 #include "memory/guardedMemory.hpp"
3844 #include "utilities/quickSort.hpp"
3845 #include "utilities/ostream.hpp"
3846 #if INCLUDE_VM_STRUCTS
3847 #include "runtime/vmStructs.hpp"
3848 #endif
3849
3850 #define run_unit_test(unit_test_function_call) \
3851 tty->print_cr("Running test: " #unit_test_function_call); \
3852 unit_test_function_call
3853
3854 // Forward declaration
3855 void TestOS_test();
3856 void TestReservedSpace_test();
3857 void TestReserveMemorySpecial_test();
3858 void TestVirtualSpace_test();
3859 void TestMetaspaceAux_test();
3860 void TestMetachunk_test();
3861 void TestVirtualSpaceNode_test();
3862 void TestNewSize_test();
3863 void TestOldSize_test();
3864 void TestKlass_test();
3865 void TestBitMap_test();
3866 void TestAsUtf8();
3867 void Test_linked_list();
3868 void TestChunkedList_test();
3869 #if INCLUDE_ALL_GCS
3870 void TestOldFreeSpaceCalculation_test();
3871 void TestG1BiasedArray_test();
3872 void TestBufferingOopClosure_test();
3873 void TestCodeCacheRemSet_test();
3874 void FreeRegionList_test();
3875 #endif
3876
3877 void execute_internal_vm_tests() {
3878 if (ExecuteInternalVMTests) {
3879 tty->print_cr("Running internal VM tests");
3880 run_unit_test(TestOS_test());
3881 run_unit_test(TestReservedSpace_test());
3882 run_unit_test(TestReserveMemorySpecial_test());
3883 run_unit_test(TestVirtualSpace_test());
3884 run_unit_test(TestMetaspaceAux_test());
3885 run_unit_test(TestMetachunk_test());
3886 run_unit_test(TestVirtualSpaceNode_test());
3887 run_unit_test(GlobalDefinitions::test_globals());
3888 run_unit_test(GCTimerAllTest::all());
3889 run_unit_test(arrayOopDesc::test_max_array_length());
3890 run_unit_test(CollectedHeap::test_is_in());
3891 run_unit_test(QuickSort::test_quick_sort());
3892 run_unit_test(GuardedMemory::test_guarded_memory());
3893 run_unit_test(AltHashing::test_alt_hash());
3894 run_unit_test(test_loggc_filename());
3895 run_unit_test(TestNewSize_test());
3896 run_unit_test(TestOldSize_test());
3897 run_unit_test(TestKlass_test());
3898 run_unit_test(TestBitMap_test());
3899 run_unit_test(TestAsUtf8());
3900 run_unit_test(ObjectMonitor::sanity_checks());
3901 run_unit_test(Test_linked_list());
3902 run_unit_test(TestChunkedList_test());
3903 #if INCLUDE_VM_STRUCTS
3904 run_unit_test(VMStructs::test());
3905 #endif
3906 #if INCLUDE_ALL_GCS
3907 run_unit_test(TestOldFreeSpaceCalculation_test());
3908 run_unit_test(TestG1BiasedArray_test());
3909 run_unit_test(HeapRegionRemSet::test_prt());
3910 run_unit_test(TestBufferingOopClosure_test());
3911 run_unit_test(TestCodeCacheRemSet_test());
3912 if (UseG1GC) {
3913 run_unit_test(FreeRegionList_test());
3914 }
3915 #endif
3916 tty->print_cr("All internal VM tests passed");
3917 }
3918 }
3919
3920 #undef run_unit_test
3921
3922 #endif
3923
3924 DT_RETURN_MARK_DECL(CreateJavaVM, jint
3925 , HOTSPOT_JNI_CREATEJAVAVM_RETURN(_ret_ref));
3926
3927 _JNI_IMPORT_OR_EXPORT_ jint JNICALL JNI_CreateJavaVM(JavaVM **vm, void **penv, void *args) {
3928 HOTSPOT_JNI_CREATEJAVAVM_ENTRY((void **) vm, penv, args);
3929
3930 jint result = JNI_ERR;
3931 DT_RETURN_MARK(CreateJavaVM, jint, (const jint&)result);
3932
3933 // We're about to use Atomic::xchg for synchronization. Some Zero
3934 // platforms use the GCC builtin __sync_lock_test_and_set for this,
3935 // but __sync_lock_test_and_set is not guaranteed to do what we want
3936 // on all architectures. So we check it works before relying on it.
3937 #if defined(ZERO) && defined(ASSERT)
3938 {
3939 jint a = 0xcafebabe;
3940 jint b = Atomic::xchg(0xdeadbeef, &a);
3941 void *c = &a;
3942 void *d = Atomic::xchg_ptr(&b, &c);
3943 assert(a == (jint) 0xdeadbeef && b == (jint) 0xcafebabe, "Atomic::xchg() works");
3944 assert(c == &b && d == &a, "Atomic::xchg_ptr() works");
3945 }
3946 #endif // ZERO && ASSERT
3947
3948 // At the moment it's only possible to have one Java VM,
3949 // since some of the runtime state is in global variables.
3950
3951 // We cannot use our mutex locks here, since they only work on
3952 // Threads. We do an atomic compare and exchange to ensure only
3953 // one thread can call this method at a time
3954
3955 // We use Atomic::xchg rather than Atomic::add/dec since on some platforms
3956 // the add/dec implementations are dependent on whether we are running
3957 // on a multiprocessor, and at this stage of initialization the os::is_MP
3958 // function used to determine this will always return false. Atomic::xchg
3959 // does not have this problem.
3960 if (Atomic::xchg(1, &vm_created) == 1) {
3961 return JNI_EEXIST; // already created, or create attempt in progress
3962 }
3963 if (Atomic::xchg(0, &safe_to_recreate_vm) == 0) {
3964 return JNI_ERR; // someone tried and failed and retry not allowed.
3965 }
3966
3967 assert(vm_created == 1, "vm_created is true during the creation");
3968
3969 /**
3970 * Certain errors during initialization are recoverable and do not
3971 * prevent this method from being called again at a later time
3972 * (perhaps with different arguments). However, at a certain
3973 * point during initialization if an error occurs we cannot allow
3974 * this function to be called again (or it will crash). In those
3975 * situations, the 'canTryAgain' flag is set to false, which atomically
3976 * sets safe_to_recreate_vm to 1, such that any new call to
3977 * JNI_CreateJavaVM will immediately fail using the above logic.
3978 */
3979 bool can_try_again = true;
3980
3981 result = Threads::create_vm((JavaVMInitArgs*) args, &can_try_again);
3982 if (result == JNI_OK) {
3983 JavaThread *thread = JavaThread::current();
3984 assert(!thread->has_pending_exception(), "should have returned not OK");
3985 /* thread is thread_in_vm here */
3986 *vm = (JavaVM *)(&main_vm);
3987 *(JNIEnv**)penv = thread->jni_environment();
3988
3989 // Tracks the time application was running before GC
3990 RuntimeService::record_application_start();
3991
3992 // Notify JVMTI
3993 if (JvmtiExport::should_post_thread_life()) {
3994 JvmtiExport::post_thread_start(thread);
3995 }
3996
3997 EventThreadStart event;
3998 if (event.should_commit()) {
3999 event.set_javalangthread(java_lang_Thread::thread_id(thread->threadObj()));
4000 event.commit();
4001 }
4002
4003 #ifndef PRODUCT
4004 #ifndef CALL_TEST_FUNC_WITH_WRAPPER_IF_NEEDED
4005 #define CALL_TEST_FUNC_WITH_WRAPPER_IF_NEEDED(f) f()
4006 #endif
4007
4008 // Check if we should compile all classes on bootclasspath
4009 if (CompileTheWorld) ClassLoader::compile_the_world();
4010 if (ReplayCompiles) ciReplay::replay(thread);
4011
4012 // Some platforms (like Win*) need a wrapper around these test
4013 // functions in order to properly handle error conditions.
4014 CALL_TEST_FUNC_WITH_WRAPPER_IF_NEEDED(test_error_handler);
4015 CALL_TEST_FUNC_WITH_WRAPPER_IF_NEEDED(execute_internal_vm_tests);
4016 #endif
4017
4018 // Since this is not a JVM_ENTRY we have to set the thread state manually before leaving.
4019 ThreadStateTransition::transition_and_fence(thread, _thread_in_vm, _thread_in_native);
4020 } else {
4021 // If create_vm exits because of a pending exception, exit with that
4022 // exception. In the future when we figure out how to reclaim memory,
4023 // we may be able to exit with JNI_ERR and allow the calling application
4024 // to continue.
4025 if (Universe::is_fully_initialized()) {
4026 // otherwise no pending exception possible - VM will already have aborted
4027 JavaThread* THREAD = JavaThread::current();
4028 if (HAS_PENDING_EXCEPTION) {
4029 HandleMark hm;
4030 vm_exit_during_initialization(Handle(THREAD, PENDING_EXCEPTION));
4031 }
4032 }
4033
4034 if (can_try_again) {
4035 // reset safe_to_recreate_vm to 1 so that retrial would be possible
4036 safe_to_recreate_vm = 1;
4037 }
4038
4039 // Creation failed. We must reset vm_created
4040 *vm = 0;
4041 *(JNIEnv**)penv = 0;
4042 // reset vm_created last to avoid race condition. Use OrderAccess to
4043 // control both compiler and architectural-based reordering.
4044 OrderAccess::release_store(&vm_created, 0);
4045 }
4046
4047 return result;
4048 }
4049
4050
4051 _JNI_IMPORT_OR_EXPORT_ jint JNICALL JNI_GetCreatedJavaVMs(JavaVM **vm_buf, jsize bufLen, jsize *numVMs) {
4052 // See bug 4367188, the wrapper can sometimes cause VM crashes
4053 // JNIWrapper("GetCreatedJavaVMs");
4054
4055 HOTSPOT_JNI_GETCREATEDJAVAVMS_ENTRY((void **) vm_buf, bufLen, (uintptr_t *) numVMs);
4056
4057 if (vm_created) {
4058 if (numVMs != NULL) *numVMs = 1;
4059 if (bufLen > 0) *vm_buf = (JavaVM *)(&main_vm);
4060 } else {
4061 if (numVMs != NULL) *numVMs = 0;
4062 }
4063 HOTSPOT_JNI_GETCREATEDJAVAVMS_RETURN(JNI_OK);
4064 return JNI_OK;
4065 }
4066
4067 extern "C" {
4068
4069 DT_RETURN_MARK_DECL(DestroyJavaVM, jint
4070 , HOTSPOT_JNI_DESTROYJAVAVM_RETURN(_ret_ref));
4071
4072 jint JNICALL jni_DestroyJavaVM(JavaVM *vm) {
4073 HOTSPOT_JNI_DESTROYJAVAVM_ENTRY(vm);
4074 jint res = JNI_ERR;
4075 DT_RETURN_MARK(DestroyJavaVM, jint, (const jint&)res);
4076
4077 if (!vm_created) {
4078 res = JNI_ERR;
4079 return res;
4080 }
4081
4082 JNIWrapper("DestroyJavaVM");
4083 JNIEnv *env;
4084 JavaVMAttachArgs destroyargs;
4085 destroyargs.version = CurrentVersion;
4086 destroyargs.name = (char *)"DestroyJavaVM";
4087 destroyargs.group = NULL;
4088 res = vm->AttachCurrentThread((void **)&env, (void *)&destroyargs);
4089 if (res != JNI_OK) {
4090 return res;
4091 }
4092
4093 // Since this is not a JVM_ENTRY we have to set the thread state manually before entering.
4094 JavaThread* thread = JavaThread::current();
4095 ThreadStateTransition::transition_from_native(thread, _thread_in_vm);
4096 if (Threads::destroy_vm()) {
4097 // Should not change thread state, VM is gone
4098 vm_created = false;
4099 res = JNI_OK;
4100 return res;
4101 } else {
4102 ThreadStateTransition::transition_and_fence(thread, _thread_in_vm, _thread_in_native);
4103 res = JNI_ERR;
4104 return res;
4105 }
4106 }
4107
4108
4109 static jint attach_current_thread(JavaVM *vm, void **penv, void *_args, bool daemon) {
4110 JavaVMAttachArgs *args = (JavaVMAttachArgs *) _args;
4111
4112 // Check below commented out from JDK1.2fcs as well
4113 /*
4114 if (args && (args->version != JNI_VERSION_1_1 || args->version != JNI_VERSION_1_2)) {
4115 return JNI_EVERSION;
4116 }
4117 */
4118
4119 Thread* t = ThreadLocalStorage::get_thread_slow();
4120 if (t != NULL) {
4121 // If the thread has been attached this operation is a no-op
4122 *(JNIEnv**)penv = ((JavaThread*) t)->jni_environment();
4123 return JNI_OK;
4124 }
4125
4126 // Create a thread and mark it as attaching so it will be skipped by the
4127 // ThreadsListEnumerator - see CR 6404306
4128 JavaThread* thread = new JavaThread(true);
4129
4130 // Set correct safepoint info. The thread is going to call into Java when
4131 // initializing the Java level thread object. Hence, the correct state must
4132 // be set in order for the Safepoint code to deal with it correctly.
4133 thread->set_thread_state(_thread_in_vm);
4134 // Must do this before initialize_thread_local_storage
4135 thread->record_stack_base_and_size();
4136
4137 thread->initialize_thread_local_storage();
4138
4139 if (!os::create_attached_thread(thread)) {
4140 delete thread;
4141 return JNI_ERR;
4142 }
4143 // Enable stack overflow checks
4144 thread->create_stack_guard_pages();
4145
4146 thread->initialize_tlab();
4147
4148 thread->cache_global_variables();
4149
4150 // Crucial that we do not have a safepoint check for this thread, since it has
4151 // not been added to the Thread list yet.
4152 { Threads_lock->lock_without_safepoint_check();
4153 // This must be inside this lock in order to get FullGCALot to work properly, i.e., to
4154 // avoid this thread trying to do a GC before it is added to the thread-list
4155 thread->set_active_handles(JNIHandleBlock::allocate_block());
4156 Threads::add(thread, daemon);
4157 Threads_lock->unlock();
4158 }
4159 // Create thread group and name info from attach arguments
4160 oop group = NULL;
4161 char* thread_name = NULL;
4162 if (args != NULL && Threads::is_supported_jni_version(args->version)) {
4163 group = JNIHandles::resolve(args->group);
4164 thread_name = args->name; // may be NULL
4165 }
4166 if (group == NULL) group = Universe::main_thread_group();
4167
4168 // Create Java level thread object and attach it to this thread
4169 bool attach_failed = false;
4170 {
4171 EXCEPTION_MARK;
4172 HandleMark hm(THREAD);
4173 Handle thread_group(THREAD, group);
4174 thread->allocate_threadObj(thread_group, thread_name, daemon, THREAD);
4175 if (HAS_PENDING_EXCEPTION) {
4176 CLEAR_PENDING_EXCEPTION;
4177 // cleanup outside the handle mark.
4178 attach_failed = true;
4179 }
4180 }
4181
4182 if (attach_failed) {
4183 // Added missing cleanup
4184 thread->cleanup_failed_attach_current_thread();
4185 return JNI_ERR;
4186 }
4187
4188 // mark the thread as no longer attaching
4189 // this uses a fence to push the change through so we don't have
4190 // to regrab the threads_lock
4191 thread->set_done_attaching_via_jni();
4192
4193 // Set java thread status.
4194 java_lang_Thread::set_thread_status(thread->threadObj(),
4195 java_lang_Thread::RUNNABLE);
4196
4197 // Notify the debugger
4198 if (JvmtiExport::should_post_thread_life()) {
4199 JvmtiExport::post_thread_start(thread);
4200 }
4201
4202 EventThreadStart event;
4203 if (event.should_commit()) {
4204 event.set_javalangthread(java_lang_Thread::thread_id(thread->threadObj()));
4205 event.commit();
4206 }
4207
4208 *(JNIEnv**)penv = thread->jni_environment();
4209
4210 // Now leaving the VM, so change thread_state. This is normally automatically taken care
4211 // of in the JVM_ENTRY. But in this situation we have to do it manually. Notice, that by
4212 // using ThreadStateTransition::transition, we do a callback to the safepoint code if
4213 // needed.
4214
4215 ThreadStateTransition::transition_and_fence(thread, _thread_in_vm, _thread_in_native);
4216
4217 // Perform any platform dependent FPU setup
4218 os::setup_fpu();
4219
4220 return JNI_OK;
4221 }
4222
4223
4224 jint JNICALL jni_AttachCurrentThread(JavaVM *vm, void **penv, void *_args) {
4225 HOTSPOT_JNI_ATTACHCURRENTTHREAD_ENTRY(vm, penv, _args);
4226 if (!vm_created) {
4227 HOTSPOT_JNI_ATTACHCURRENTTHREAD_RETURN((uint32_t) JNI_ERR);
4228 return JNI_ERR;
4229 }
4230
4231 JNIWrapper("AttachCurrentThread");
4232 jint ret = attach_current_thread(vm, penv, _args, false);
4233 HOTSPOT_JNI_ATTACHCURRENTTHREAD_RETURN(ret);
4234 return ret;
4235 }
4236
4237
4238 jint JNICALL jni_DetachCurrentThread(JavaVM *vm) {
4239 HOTSPOT_JNI_DETACHCURRENTTHREAD_ENTRY(vm);
4240 VM_Exit::block_if_vm_exited();
4241
4242 JNIWrapper("DetachCurrentThread");
4243
4244 // If the thread has been deattacted the operations is a no-op
4245 if (ThreadLocalStorage::thread() == NULL) {
4246 HOTSPOT_JNI_DETACHCURRENTTHREAD_RETURN(JNI_OK);
4247 return JNI_OK;
4248 }
4249
4250 JavaThread* thread = JavaThread::current();
4251 if (thread->has_last_Java_frame()) {
4252 HOTSPOT_JNI_DETACHCURRENTTHREAD_RETURN((uint32_t) JNI_ERR);
4253 // Can't detach a thread that's running java, that can't work.
4254 return JNI_ERR;
4255 }
4256
4257 // Safepoint support. Have to do call-back to safepoint code, if in the
4258 // middel of a safepoint operation
4259 ThreadStateTransition::transition_from_native(thread, _thread_in_vm);
4260
4261 // XXX: Note that JavaThread::exit() call below removes the guards on the
4262 // stack pages set up via enable_stack_{red,yellow}_zone() calls
4263 // above in jni_AttachCurrentThread. Unfortunately, while the setting
4264 // of the guards is visible in jni_AttachCurrentThread above,
4265 // the removal of the guards is buried below in JavaThread::exit()
4266 // here. The abstraction should be more symmetrically either exposed
4267 // or hidden (e.g. it could probably be hidden in the same
4268 // (platform-dependent) methods where we do alternate stack
4269 // maintenance work?)
4270 thread->exit(false, JavaThread::jni_detach);
4271 delete thread;
4272
4273 HOTSPOT_JNI_DETACHCURRENTTHREAD_RETURN(JNI_OK);
4274 return JNI_OK;
4275 }
4276
4277 DT_RETURN_MARK_DECL(GetEnv, jint
4278 , HOTSPOT_JNI_GETENV_RETURN(_ret_ref));
4279
4280 jint JNICALL jni_GetEnv(JavaVM *vm, void **penv, jint version) {
4281 HOTSPOT_JNI_GETENV_ENTRY(vm, penv, version);
4282 jint ret = JNI_ERR;
4283 DT_RETURN_MARK(GetEnv, jint, (const jint&)ret);
4284
4285 if (!vm_created) {
4286 *penv = NULL;
4287 ret = JNI_EDETACHED;
4288 return ret;
4289 }
4290
4291 if (JniExportedInterface::GetExportedInterface(vm, penv, version, &ret)) {
4292 return ret;
4293 }
4294
4295 #ifndef JVMPI_VERSION_1
4296 // need these in order to be polite about older agents
4297 #define JVMPI_VERSION_1 ((jint)0x10000001)
4298 #define JVMPI_VERSION_1_1 ((jint)0x10000002)
4299 #define JVMPI_VERSION_1_2 ((jint)0x10000003)
4300 #endif // !JVMPI_VERSION_1
4301
4302 Thread* thread = ThreadLocalStorage::thread();
4303 if (thread != NULL && thread->is_Java_thread()) {
4304 if (Threads::is_supported_jni_version_including_1_1(version)) {
4305 *(JNIEnv**)penv = ((JavaThread*) thread)->jni_environment();
4306 ret = JNI_OK;
4307 return ret;
4308
4309 } else if (version == JVMPI_VERSION_1 ||
4310 version == JVMPI_VERSION_1_1 ||
4311 version == JVMPI_VERSION_1_2) {
4312 tty->print_cr("ERROR: JVMPI, an experimental interface, is no longer supported.");
4313 tty->print_cr("Please use the supported interface: the JVM Tool Interface (JVM TI).");
4314 ret = JNI_EVERSION;
4315 return ret;
4316 } else if (JvmtiExport::is_jvmdi_version(version)) {
4317 tty->print_cr("FATAL ERROR: JVMDI is no longer supported.");
4318 tty->print_cr("Please use the supported interface: the JVM Tool Interface (JVM TI).");
4319 ret = JNI_EVERSION;
4320 return ret;
4321 } else {
4322 *penv = NULL;
4323 ret = JNI_EVERSION;
4324 return ret;
4325 }
4326 } else {
4327 *penv = NULL;
4328 ret = JNI_EDETACHED;
4329 return ret;
4330 }
4331 }
4332
4333
4334 jint JNICALL jni_AttachCurrentThreadAsDaemon(JavaVM *vm, void **penv, void *_args) {
4335 HOTSPOT_JNI_ATTACHCURRENTTHREADASDAEMON_ENTRY(vm, penv, _args);
4336 if (!vm_created) {
4337 HOTSPOT_JNI_ATTACHCURRENTTHREADASDAEMON_RETURN((uint32_t) JNI_ERR);
4338 return JNI_ERR;
4339 }
4340
4341 JNIWrapper("AttachCurrentThreadAsDaemon");
4342 jint ret = attach_current_thread(vm, penv, _args, true);
4343 HOTSPOT_JNI_ATTACHCURRENTTHREADASDAEMON_RETURN(ret);
4344 return ret;
4345 }
4346
4347
4348 } // End extern "C"
4349
4350 const struct JNIInvokeInterface_ jni_InvokeInterface = {
4351 NULL,
4352 NULL,
4353 NULL,
4354
4355 jni_DestroyJavaVM,
4356 jni_AttachCurrentThread,
4357 jni_DetachCurrentThread,
4358 jni_GetEnv,
4359 jni_AttachCurrentThreadAsDaemon
4360 };