1 /*
2 * Copyright (c) 1997, 2016, Oracle and/or its affiliates. All rights reserved.
3 * Copyright (c) 2012 Red Hat, Inc.
4 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
5 *
6 * This code is free software; you can redistribute it and/or modify it
7 * under the terms of the GNU General Public License version 2 only, as
8 * published by the Free Software Foundation.
9 *
10 * This code is distributed in the hope that it will be useful, but WITHOUT
11 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
12 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
13 * version 2 for more details (a copy is included in the LICENSE file that
14 * accompanied this code).
15 *
16 * You should have received a copy of the GNU General Public License version
17 * 2 along with this work; if not, write to the Free Software Foundation,
18 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
19 *
20 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
21 * or visit www.oracle.com if you need additional information or have any
22 * questions.
23 *
24 */
25
26 #include "precompiled.hpp"
27 #include "ci/ciReplay.hpp"
28 #include "classfile/altHashing.hpp"
29 #include "classfile/classFileStream.hpp"
30 #include "classfile/classLoader.hpp"
31 #include "classfile/javaClasses.hpp"
32 #include "classfile/javaClasses.inline.hpp"
33 #include "classfile/modules.hpp"
34 #include "classfile/symbolTable.hpp"
35 #include "classfile/systemDictionary.hpp"
36 #include "classfile/vmSymbols.hpp"
37 #include "gc/shared/gcLocker.inline.hpp"
38 #include "interpreter/linkResolver.hpp"
39 #include "memory/allocation.hpp"
40 #include "memory/allocation.inline.hpp"
41 #include "memory/oopFactory.hpp"
42 #include "memory/resourceArea.hpp"
43 #include "memory/universe.inline.hpp"
44 #include "oops/instanceKlass.hpp"
45 #include "oops/instanceOop.hpp"
46 #include "oops/markOop.hpp"
47 #include "oops/method.hpp"
48 #include "oops/objArrayKlass.hpp"
49 #include "oops/objArrayOop.inline.hpp"
50 #include "oops/oop.inline.hpp"
51 #include "oops/symbol.hpp"
52 #include "oops/typeArrayKlass.hpp"
53 #include "oops/typeArrayOop.hpp"
54 #include "prims/jni.h"
55 #include "prims/jniCheck.hpp"
56 #include "prims/jniExport.hpp"
57 #include "prims/jniFastGetField.hpp"
58 #include "prims/jvm.h"
59 #include "prims/jvm_misc.hpp"
60 #include "prims/jvmtiExport.hpp"
61 #include "prims/jvmtiThreadState.hpp"
62 #include "runtime/atomic.inline.hpp"
63 #include "runtime/compilationPolicy.hpp"
64 #include "runtime/fieldDescriptor.hpp"
65 #include "runtime/fprofiler.hpp"
66 #include "runtime/handles.inline.hpp"
67 #include "runtime/interfaceSupport.hpp"
68 #include "runtime/java.hpp"
69 #include "runtime/javaCalls.hpp"
70 #include "runtime/jfieldIDWorkaround.hpp"
71 #include "runtime/orderAccess.inline.hpp"
72 #include "runtime/reflection.hpp"
73 #include "runtime/sharedRuntime.hpp"
74 #include "runtime/signature.hpp"
75 #include "runtime/thread.inline.hpp"
76 #include "runtime/vm_operations.hpp"
77 #include "services/memTracker.hpp"
78 #include "services/runtimeService.hpp"
79 #include "trace/traceMacros.hpp"
80 #include "trace/tracing.hpp"
81 #include "utilities/defaultStream.hpp"
82 #include "utilities/dtrace.hpp"
83 #include "utilities/events.hpp"
84 #include "utilities/histogram.hpp"
85 #include "utilities/internalVMTests.hpp"
86 #include "utilities/macros.hpp"
87 #if INCLUDE_ALL_GCS
88 #include "gc/shared/satbMarkQueue.hpp"
89 #endif // INCLUDE_ALL_GCS
90 #if INCLUDE_JVMCI
91 #include "jvmci/jvmciCompiler.hpp"
92 #include "jvmci/jvmciRuntime.hpp"
93 #endif
94
95 static jint CurrentVersion = JNI_VERSION_9;
96
97 #ifdef _WIN32
98 extern LONG WINAPI topLevelExceptionFilter(_EXCEPTION_POINTERS* );
99 #endif
100
101 // The DT_RETURN_MARK macros create a scoped object to fire the dtrace
102 // '-return' probe regardless of the return path is taken out of the function.
103 // Methods that have multiple return paths use this to avoid having to
104 // instrument each return path. Methods that use CHECK or THROW must use this
105 // since those macros can cause an immedate uninstrumented return.
106 //
107 // In order to get the return value, a reference to the variable containing
108 // the return value must be passed to the contructor of the object, and
109 // the return value must be set before return (since the mark object has
110 // a reference to it).
111 //
112 // Example:
113 // DT_RETURN_MARK_DECL(SomeFunc, int);
114 // JNI_ENTRY(int, SomeFunc, ...)
115 // int return_value = 0;
116 // DT_RETURN_MARK(SomeFunc, int, (const int&)return_value);
117 // foo(CHECK_0)
118 // return_value = 5;
119 // return return_value;
120 // JNI_END
121 #define DT_RETURN_MARK_DECL(name, type, probe) \
122 DTRACE_ONLY( \
123 class DTraceReturnProbeMark_##name { \
124 public: \
125 const type& _ret_ref; \
126 DTraceReturnProbeMark_##name(const type& v) : _ret_ref(v) {} \
127 ~DTraceReturnProbeMark_##name() { \
128 probe; \
129 } \
130 } \
131 )
132 // Void functions are simpler since there's no return value
133 #define DT_VOID_RETURN_MARK_DECL(name, probe) \
134 DTRACE_ONLY( \
135 class DTraceReturnProbeMark_##name { \
136 public: \
137 ~DTraceReturnProbeMark_##name() { \
138 probe; \
139 } \
140 } \
141 )
142
143 // Place these macros in the function to mark the return. Non-void
144 // functions need the type and address of the return value.
145 #define DT_RETURN_MARK(name, type, ref) \
146 DTRACE_ONLY( DTraceReturnProbeMark_##name dtrace_return_mark(ref) )
147 #define DT_VOID_RETURN_MARK(name) \
148 DTRACE_ONLY( DTraceReturnProbeMark_##name dtrace_return_mark )
149
150
151 // Use these to select distinct code for floating-point vs. non-floating point
152 // situations. Used from within common macros where we need slightly
153 // different behavior for Float/Double
154 #define FP_SELECT_Boolean(intcode, fpcode) intcode
155 #define FP_SELECT_Byte(intcode, fpcode) intcode
156 #define FP_SELECT_Char(intcode, fpcode) intcode
157 #define FP_SELECT_Short(intcode, fpcode) intcode
158 #define FP_SELECT_Object(intcode, fpcode) intcode
159 #define FP_SELECT_Int(intcode, fpcode) intcode
160 #define FP_SELECT_Long(intcode, fpcode) intcode
161 #define FP_SELECT_Float(intcode, fpcode) fpcode
162 #define FP_SELECT_Double(intcode, fpcode) fpcode
163 #define FP_SELECT(TypeName, intcode, fpcode) \
164 FP_SELECT_##TypeName(intcode, fpcode)
165
166 #define COMMA ,
167
168 // Choose DT_RETURN_MARK macros based on the type: float/double -> void
169 // (dtrace doesn't do FP yet)
170 #define DT_RETURN_MARK_DECL_FOR(TypeName, name, type, probe) \
171 FP_SELECT(TypeName, \
172 DT_RETURN_MARK_DECL(name, type, probe), DT_VOID_RETURN_MARK_DECL(name, probe) )
173 #define DT_RETURN_MARK_FOR(TypeName, name, type, ref) \
174 FP_SELECT(TypeName, \
175 DT_RETURN_MARK(name, type, ref), DT_VOID_RETURN_MARK(name) )
176
177
178 // out-of-line helpers for class jfieldIDWorkaround:
179
180 bool jfieldIDWorkaround::is_valid_jfieldID(Klass* k, jfieldID id) {
181 if (jfieldIDWorkaround::is_instance_jfieldID(k, id)) {
182 uintptr_t as_uint = (uintptr_t) id;
183 intptr_t offset = raw_instance_offset(id);
184 if (is_checked_jfieldID(id)) {
185 if (!klass_hash_ok(k, id)) {
186 return false;
187 }
188 }
189 return InstanceKlass::cast(k)->contains_field_offset(offset);
190 } else {
191 JNIid* result = (JNIid*) id;
192 #ifdef ASSERT
193 return result != NULL && result->is_static_field_id();
194 #else
195 return result != NULL;
196 #endif
197 }
198 }
199
200
201 intptr_t jfieldIDWorkaround::encode_klass_hash(Klass* k, intptr_t offset) {
202 if (offset <= small_offset_mask) {
203 Klass* field_klass = k;
204 Klass* super_klass = field_klass->super();
205 // With compressed oops the most super class with nonstatic fields would
206 // be the owner of fields embedded in the header.
207 while (InstanceKlass::cast(super_klass)->has_nonstatic_fields() &&
208 InstanceKlass::cast(super_klass)->contains_field_offset(offset)) {
209 field_klass = super_klass; // super contains the field also
210 super_klass = field_klass->super();
211 }
212 debug_only(NoSafepointVerifier nosafepoint;)
213 uintptr_t klass_hash = field_klass->identity_hash();
214 return ((klass_hash & klass_mask) << klass_shift) | checked_mask_in_place;
215 } else {
216 #if 0
217 #ifndef PRODUCT
218 {
219 ResourceMark rm;
220 warning("VerifyJNIFields: long offset %d in %s", offset, k->external_name());
221 }
222 #endif
223 #endif
224 return 0;
225 }
226 }
227
228 bool jfieldIDWorkaround::klass_hash_ok(Klass* k, jfieldID id) {
229 uintptr_t as_uint = (uintptr_t) id;
230 intptr_t klass_hash = (as_uint >> klass_shift) & klass_mask;
231 do {
232 debug_only(NoSafepointVerifier nosafepoint;)
233 // Could use a non-blocking query for identity_hash here...
234 if ((k->identity_hash() & klass_mask) == klass_hash)
235 return true;
236 k = k->super();
237 } while (k != NULL);
238 return false;
239 }
240
241 void jfieldIDWorkaround::verify_instance_jfieldID(Klass* k, jfieldID id) {
242 guarantee(jfieldIDWorkaround::is_instance_jfieldID(k, id), "must be an instance field" );
243 uintptr_t as_uint = (uintptr_t) id;
244 intptr_t offset = raw_instance_offset(id);
245 if (VerifyJNIFields) {
246 if (is_checked_jfieldID(id)) {
247 guarantee(klass_hash_ok(k, id),
248 "Bug in native code: jfieldID class must match object");
249 } else {
250 #if 0
251 #ifndef PRODUCT
252 if (Verbose) {
253 ResourceMark rm;
254 warning("VerifyJNIFields: unverified offset %d for %s", offset, k->external_name());
255 }
256 #endif
257 #endif
258 }
259 }
260 guarantee(InstanceKlass::cast(k)->contains_field_offset(offset),
261 "Bug in native code: jfieldID offset must address interior of object");
262 }
263
264 // Wrapper to trace JNI functions
265
266 #ifdef ASSERT
267 Histogram* JNIHistogram;
268 static volatile jint JNIHistogram_lock = 0;
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);
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, ClassFileStream::verify);
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,
348 class_loader,
349 Handle(),
350 &st,
351 CHECK_NULL);
352
353 if (log_is_enabled(Debug, classresolve) && k != NULL) {
354 trace_class_resolution(k);
355 }
356
357 cls = (jclass)JNIHandles::make_local(
358 env, k->java_mirror());
359 return cls;
360 JNI_END
361
362
363
364 static bool first_time_FindClass = true;
365
366 DT_RETURN_MARK_DECL(FindClass, jclass
367 , HOTSPOT_JNI_FINDCLASS_RETURN(_ret_ref));
368
369 JNI_ENTRY(jclass, jni_FindClass(JNIEnv *env, const char *name))
370 JNIWrapper("FindClass");
371
372 HOTSPOT_JNI_FINDCLASS_ENTRY(env, (char *)name);
373
374 jclass result = NULL;
375 DT_RETURN_MARK(FindClass, jclass, (const jclass&)result);
376
377 // Remember if we are the first invocation of jni_FindClass
378 bool first_time = first_time_FindClass;
379 first_time_FindClass = false;
380
381 // Sanity check the name: it cannot be null or larger than the maximum size
382 // name we can fit in the constant pool.
383 if (name == NULL || (int)strlen(name) > Symbol::max_length()) {
384 THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), name);
385 }
386
387 //%note jni_3
388 Handle loader;
389 Handle protection_domain;
390 // Find calling class
391 instanceKlassHandle k (THREAD, thread->security_get_caller_class(0));
392 if (k.not_null()) {
393 loader = Handle(THREAD, k->class_loader());
394 // Special handling to make sure JNI_OnLoad and JNI_OnUnload are executed
395 // in the correct class context.
396 if (loader.is_null() &&
397 k->name() == vmSymbols::java_lang_ClassLoader_NativeLibrary()) {
398 JavaValue result(T_OBJECT);
399 JavaCalls::call_static(&result, k,
400 vmSymbols::getFromClass_name(),
401 vmSymbols::void_class_signature(),
402 thread);
403 if (HAS_PENDING_EXCEPTION) {
404 Handle ex(thread, thread->pending_exception());
405 CLEAR_PENDING_EXCEPTION;
406 THROW_HANDLE_0(ex);
407 }
408 oop mirror = (oop) result.get_jobject();
409 loader = Handle(THREAD,
410 InstanceKlass::cast(java_lang_Class::as_Klass(mirror))->class_loader());
411 protection_domain = Handle(THREAD,
412 InstanceKlass::cast(java_lang_Class::as_Klass(mirror))->protection_domain());
413 }
414 } else {
415 // We call ClassLoader.getSystemClassLoader to obtain the system class loader.
416 loader = Handle(THREAD, SystemDictionary::java_system_loader());
417 }
418
419 TempNewSymbol sym = SymbolTable::new_symbol(name, CHECK_NULL);
420 result = find_class_from_class_loader(env, sym, true, loader,
421 protection_domain, true, thread);
422
423 if (log_is_enabled(Debug, classresolve) && result != NULL) {
424 trace_class_resolution(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(result)));
425 }
426
427 // If we were the first invocation of jni_FindClass, we enable compilation again
428 // rather than just allowing invocation counter to overflow and decay.
429 // Controlled by flag DelayCompilationDuringStartup.
430 if (first_time && !CompileTheWorld)
431 CompilationPolicy::completed_vm_startup();
432
433 return result;
434 JNI_END
435
436 DT_RETURN_MARK_DECL(FromReflectedMethod, jmethodID
437 , HOTSPOT_JNI_FROMREFLECTEDMETHOD_RETURN((uintptr_t)_ret_ref));
438
439 JNI_ENTRY(jmethodID, jni_FromReflectedMethod(JNIEnv *env, jobject method))
440 JNIWrapper("FromReflectedMethod");
441
442 HOTSPOT_JNI_FROMREFLECTEDMETHOD_ENTRY(env, method);
443
444 jmethodID ret = NULL;
445 DT_RETURN_MARK(FromReflectedMethod, jmethodID, (const jmethodID&)ret);
446
447 // method is a handle to a java.lang.reflect.Method object
448 oop reflected = JNIHandles::resolve_non_null(method);
449 oop mirror = NULL;
450 int slot = 0;
451
452 if (reflected->klass() == SystemDictionary::reflect_Constructor_klass()) {
453 mirror = java_lang_reflect_Constructor::clazz(reflected);
454 slot = java_lang_reflect_Constructor::slot(reflected);
455 } else {
456 assert(reflected->klass() == SystemDictionary::reflect_Method_klass(), "wrong type");
457 mirror = java_lang_reflect_Method::clazz(reflected);
458 slot = java_lang_reflect_Method::slot(reflected);
459 }
460 Klass* k = java_lang_Class::as_Klass(mirror);
461
462 KlassHandle k1(THREAD, k);
463 // Make sure class is initialized before handing id's out to methods
464 k1()->initialize(CHECK_NULL);
465 Method* m = InstanceKlass::cast(k1())->method_with_idnum(slot);
466 ret = m==NULL? NULL : m->jmethod_id(); // return NULL if reflected method deleted
467 return ret;
468 JNI_END
469
470 DT_RETURN_MARK_DECL(FromReflectedField, jfieldID
471 , HOTSPOT_JNI_FROMREFLECTEDFIELD_RETURN((uintptr_t)_ret_ref));
472
473 JNI_ENTRY(jfieldID, jni_FromReflectedField(JNIEnv *env, jobject field))
474 JNIWrapper("FromReflectedField");
475
476 HOTSPOT_JNI_FROMREFLECTEDFIELD_ENTRY(env, field);
477
478 jfieldID ret = NULL;
479 DT_RETURN_MARK(FromReflectedField, jfieldID, (const jfieldID&)ret);
480
481 // field is a handle to a java.lang.reflect.Field object
482 oop reflected = JNIHandles::resolve_non_null(field);
483 oop mirror = java_lang_reflect_Field::clazz(reflected);
484 Klass* k = java_lang_Class::as_Klass(mirror);
485 int slot = java_lang_reflect_Field::slot(reflected);
486 int modifiers = java_lang_reflect_Field::modifiers(reflected);
487
488 KlassHandle k1(THREAD, k);
489 // Make sure class is initialized before handing id's out to fields
490 k1()->initialize(CHECK_NULL);
491
492 // First check if this is a static field
493 if (modifiers & JVM_ACC_STATIC) {
494 intptr_t offset = InstanceKlass::cast(k1())->field_offset( slot );
495 JNIid* id = InstanceKlass::cast(k1())->jni_id_for(offset);
496 assert(id != NULL, "corrupt Field object");
497 debug_only(id->set_is_static_field_id();)
498 // A jfieldID for a static field is a JNIid specifying the field holder and the offset within the Klass*
499 ret = jfieldIDWorkaround::to_static_jfieldID(id);
500 return ret;
501 }
502
503 // The slot is the index of the field description in the field-array
504 // The jfieldID is the offset of the field within the object
505 // It may also have hash bits for k, if VerifyJNIFields is turned on.
506 intptr_t offset = InstanceKlass::cast(k1())->field_offset( slot );
507 assert(InstanceKlass::cast(k1())->contains_field_offset(offset), "stay within object");
508 ret = jfieldIDWorkaround::to_instance_jfieldID(k1(), offset);
509 return ret;
510 JNI_END
511
512
513 DT_RETURN_MARK_DECL(ToReflectedMethod, jobject
514 , HOTSPOT_JNI_TOREFLECTEDMETHOD_RETURN(_ret_ref));
515
516 JNI_ENTRY(jobject, jni_ToReflectedMethod(JNIEnv *env, jclass cls, jmethodID method_id, jboolean isStatic))
517 JNIWrapper("ToReflectedMethod");
518
519 HOTSPOT_JNI_TOREFLECTEDMETHOD_ENTRY(env, cls, (uintptr_t) method_id, isStatic);
520
521 jobject ret = NULL;
522 DT_RETURN_MARK(ToReflectedMethod, jobject, (const jobject&)ret);
523
524 methodHandle m (THREAD, Method::resolve_jmethod_id(method_id));
525 assert(m->is_static() == (isStatic != 0), "jni_ToReflectedMethod access flags doesn't match");
526 oop reflection_method;
527 if (m->is_initializer()) {
528 reflection_method = Reflection::new_constructor(m, CHECK_NULL);
529 } else {
530 reflection_method = Reflection::new_method(m, false, CHECK_NULL);
531 }
532 ret = JNIHandles::make_local(env, reflection_method);
533 return ret;
534 JNI_END
535
536 DT_RETURN_MARK_DECL(GetSuperclass, jclass
537 , HOTSPOT_JNI_GETSUPERCLASS_RETURN(_ret_ref));
538
539 JNI_ENTRY(jclass, jni_GetSuperclass(JNIEnv *env, jclass sub))
540 JNIWrapper("GetSuperclass");
541
542 HOTSPOT_JNI_GETSUPERCLASS_ENTRY(env, sub);
543
544 jclass obj = NULL;
545 DT_RETURN_MARK(GetSuperclass, jclass, (const jclass&)obj);
546
547 oop mirror = JNIHandles::resolve_non_null(sub);
548 // primitive classes return NULL
549 if (java_lang_Class::is_primitive(mirror)) return NULL;
550
551 // Rules of Class.getSuperClass as implemented by KLass::java_super:
552 // arrays return Object
553 // interfaces return NULL
554 // proper classes return Klass::super()
555 Klass* k = java_lang_Class::as_Klass(mirror);
556 if (k->is_interface()) return NULL;
557
558 // return mirror for superclass
559 Klass* super = k->java_super();
560 // super2 is the value computed by the compiler's getSuperClass intrinsic:
561 debug_only(Klass* super2 = ( k->is_array_klass()
562 ? SystemDictionary::Object_klass()
563 : k->super() ) );
564 assert(super == super2,
565 "java_super computation depends on interface, array, other super");
566 obj = (super == NULL) ? NULL : (jclass) JNIHandles::make_local(super->java_mirror());
567 return obj;
568 JNI_END
569
570 JNI_QUICK_ENTRY(jboolean, jni_IsAssignableFrom(JNIEnv *env, jclass sub, jclass super))
571 JNIWrapper("IsSubclassOf");
572
573 HOTSPOT_JNI_ISASSIGNABLEFROM_ENTRY(env, sub, super);
574
575 oop sub_mirror = JNIHandles::resolve_non_null(sub);
576 oop super_mirror = JNIHandles::resolve_non_null(super);
577 if (java_lang_Class::is_primitive(sub_mirror) ||
578 java_lang_Class::is_primitive(super_mirror)) {
579 jboolean ret = (sub_mirror == super_mirror);
580
581 HOTSPOT_JNI_ISASSIGNABLEFROM_RETURN(ret);
582 return ret;
583 }
584 Klass* sub_klass = java_lang_Class::as_Klass(sub_mirror);
585 Klass* super_klass = java_lang_Class::as_Klass(super_mirror);
586 assert(sub_klass != NULL && super_klass != NULL, "invalid arguments to jni_IsAssignableFrom");
587 jboolean ret = sub_klass->is_subtype_of(super_klass) ?
588 JNI_TRUE : JNI_FALSE;
589
590 HOTSPOT_JNI_ISASSIGNABLEFROM_RETURN(ret);
591 return ret;
592 JNI_END
593
594
595 DT_RETURN_MARK_DECL(Throw, jint
596 , HOTSPOT_JNI_THROW_RETURN(_ret_ref));
597
598 JNI_ENTRY(jint, jni_Throw(JNIEnv *env, jthrowable obj))
599 JNIWrapper("Throw");
600
601 HOTSPOT_JNI_THROW_ENTRY(env, obj);
602
603 jint ret = JNI_OK;
604 DT_RETURN_MARK(Throw, jint, (const jint&)ret);
605
606 THROW_OOP_(JNIHandles::resolve(obj), JNI_OK);
607 ShouldNotReachHere();
608 return 0; // Mute compiler.
609 JNI_END
610
611
612 DT_RETURN_MARK_DECL(ThrowNew, jint
613 , HOTSPOT_JNI_THROWNEW_RETURN(_ret_ref));
614
615 JNI_ENTRY(jint, jni_ThrowNew(JNIEnv *env, jclass clazz, const char *message))
616 JNIWrapper("ThrowNew");
617
618 HOTSPOT_JNI_THROWNEW_ENTRY(env, clazz, (char *) message);
619
620 jint ret = JNI_OK;
621 DT_RETURN_MARK(ThrowNew, jint, (const jint&)ret);
622
623 InstanceKlass* k = InstanceKlass::cast(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz)));
624 Symbol* name = k->name();
625 Handle class_loader (THREAD, k->class_loader());
626 Handle protection_domain (THREAD, k->protection_domain());
627 THROW_MSG_LOADER_(name, (char *)message, class_loader, protection_domain, JNI_OK);
628 ShouldNotReachHere();
629 return 0; // Mute compiler.
630 JNI_END
631
632
633 // JNI functions only transform a pending async exception to a synchronous
634 // exception in ExceptionOccurred and ExceptionCheck calls, since
635 // delivering an async exception in other places won't change the native
636 // code's control flow and would be harmful when native code further calls
637 // JNI functions with a pending exception. Async exception is also checked
638 // during the call, so ExceptionOccurred/ExceptionCheck won't return
639 // false but deliver the async exception at the very end during
640 // state transition.
641
642 static void jni_check_async_exceptions(JavaThread *thread) {
643 assert(thread == Thread::current(), "must be itself");
644 thread->check_and_handle_async_exceptions();
645 }
646
647 JNI_ENTRY_NO_PRESERVE(jthrowable, jni_ExceptionOccurred(JNIEnv *env))
648 JNIWrapper("ExceptionOccurred");
649
650 HOTSPOT_JNI_EXCEPTIONOCCURRED_ENTRY(env);
651
652 jni_check_async_exceptions(thread);
653 oop exception = thread->pending_exception();
654 jthrowable ret = (jthrowable) JNIHandles::make_local(env, exception);
655
656 HOTSPOT_JNI_EXCEPTIONOCCURRED_RETURN(ret);
657 return ret;
658 JNI_END
659
660
661 JNI_ENTRY_NO_PRESERVE(void, jni_ExceptionDescribe(JNIEnv *env))
662 JNIWrapper("ExceptionDescribe");
663
664 HOTSPOT_JNI_EXCEPTIONDESCRIBE_ENTRY(env);
665
666 if (thread->has_pending_exception()) {
667 Handle ex(thread, thread->pending_exception());
668 thread->clear_pending_exception();
669 if (ex->is_a(SystemDictionary::ThreadDeath_klass())) {
670 // Don't print anything if we are being killed.
671 } else {
672 jio_fprintf(defaultStream::error_stream(), "Exception ");
673 if (thread != NULL && thread->threadObj() != NULL) {
674 ResourceMark rm(THREAD);
675 jio_fprintf(defaultStream::error_stream(),
676 "in thread \"%s\" ", thread->get_thread_name());
677 }
678 if (ex->is_a(SystemDictionary::Throwable_klass())) {
679 JavaValue result(T_VOID);
680 JavaCalls::call_virtual(&result,
681 ex,
682 KlassHandle(THREAD,
683 SystemDictionary::Throwable_klass()),
684 vmSymbols::printStackTrace_name(),
685 vmSymbols::void_method_signature(),
686 THREAD);
687 // If an exception is thrown in the call it gets thrown away. Not much
688 // we can do with it. The native code that calls this, does not check
689 // for the exception - hence, it might still be in the thread when DestroyVM gets
690 // called, potentially causing a few asserts to trigger - since no pending exception
691 // is expected.
692 CLEAR_PENDING_EXCEPTION;
693 } else {
694 ResourceMark rm(THREAD);
695 jio_fprintf(defaultStream::error_stream(),
696 ". Uncaught exception of type %s.",
697 ex->klass()->external_name());
698 }
699 }
700 }
701
702 HOTSPOT_JNI_EXCEPTIONDESCRIBE_RETURN();
703 JNI_END
704
705
706 JNI_QUICK_ENTRY(void, jni_ExceptionClear(JNIEnv *env))
707 JNIWrapper("ExceptionClear");
708
709 HOTSPOT_JNI_EXCEPTIONCLEAR_ENTRY(env);
710
711 // The jni code might be using this API to clear java thrown exception.
712 // So just mark jvmti thread exception state as exception caught.
713 JvmtiThreadState *state = JavaThread::current()->jvmti_thread_state();
714 if (state != NULL && state->is_exception_detected()) {
715 state->set_exception_caught();
716 }
717 thread->clear_pending_exception();
718
719 HOTSPOT_JNI_EXCEPTIONCLEAR_RETURN();
720 JNI_END
721
722
723 JNI_ENTRY(void, jni_FatalError(JNIEnv *env, const char *msg))
724 JNIWrapper("FatalError");
725
726 HOTSPOT_JNI_FATALERROR_ENTRY(env, (char *) msg);
727
728 tty->print_cr("FATAL ERROR in native method: %s", msg);
729 thread->print_stack();
730 os::abort(); // Dump core and abort
731 JNI_END
732
733
734 JNI_ENTRY(jint, jni_PushLocalFrame(JNIEnv *env, jint capacity))
735 JNIWrapper("PushLocalFrame");
736
737 HOTSPOT_JNI_PUSHLOCALFRAME_ENTRY(env, capacity);
738
739 //%note jni_11
740 if (capacity < 0 ||
741 ((MaxJNILocalCapacity > 0) && (capacity > MaxJNILocalCapacity))) {
742 HOTSPOT_JNI_PUSHLOCALFRAME_RETURN((uint32_t)JNI_ERR);
743 return JNI_ERR;
744 }
745 JNIHandleBlock* old_handles = thread->active_handles();
746 JNIHandleBlock* new_handles = JNIHandleBlock::allocate_block(thread);
747 assert(new_handles != NULL, "should not be NULL");
748 new_handles->set_pop_frame_link(old_handles);
749 thread->set_active_handles(new_handles);
750 jint ret = JNI_OK;
751 HOTSPOT_JNI_PUSHLOCALFRAME_RETURN(ret);
752 return ret;
753 JNI_END
754
755
756 JNI_ENTRY(jobject, jni_PopLocalFrame(JNIEnv *env, jobject result))
757 JNIWrapper("PopLocalFrame");
758
759 HOTSPOT_JNI_POPLOCALFRAME_ENTRY(env, result);
760
761 //%note jni_11
762 Handle result_handle(thread, JNIHandles::resolve(result));
763 JNIHandleBlock* old_handles = thread->active_handles();
764 JNIHandleBlock* new_handles = old_handles->pop_frame_link();
765 if (new_handles != NULL) {
766 // As a sanity check we only release the handle blocks if the pop_frame_link is not NULL.
767 // This way code will still work if PopLocalFrame is called without a corresponding
768 // PushLocalFrame call. Note that we set the pop_frame_link to NULL explicitly, otherwise
769 // the release_block call will release the blocks.
770 thread->set_active_handles(new_handles);
771 old_handles->set_pop_frame_link(NULL); // clear link we won't release new_handles below
772 JNIHandleBlock::release_block(old_handles, thread); // may block
773 result = JNIHandles::make_local(thread, result_handle());
774 }
775 HOTSPOT_JNI_POPLOCALFRAME_RETURN(result);
776 return result;
777 JNI_END
778
779
780 JNI_ENTRY(jobject, jni_NewGlobalRef(JNIEnv *env, jobject ref))
781 JNIWrapper("NewGlobalRef");
782
783 HOTSPOT_JNI_NEWGLOBALREF_ENTRY(env, ref);
784
785 Handle ref_handle(thread, JNIHandles::resolve(ref));
786 jobject ret = JNIHandles::make_global(ref_handle);
787
788 HOTSPOT_JNI_NEWGLOBALREF_RETURN(ret);
789 return ret;
790 JNI_END
791
792 // Must be JNI_ENTRY (with HandleMark)
793 JNI_ENTRY_NO_PRESERVE(void, jni_DeleteGlobalRef(JNIEnv *env, jobject ref))
794 JNIWrapper("DeleteGlobalRef");
795
796 HOTSPOT_JNI_DELETEGLOBALREF_ENTRY(env, ref);
797
798 JNIHandles::destroy_global(ref);
799
800 HOTSPOT_JNI_DELETEGLOBALREF_RETURN();
801 JNI_END
802
803 JNI_QUICK_ENTRY(void, jni_DeleteLocalRef(JNIEnv *env, jobject obj))
804 JNIWrapper("DeleteLocalRef");
805
806 HOTSPOT_JNI_DELETELOCALREF_ENTRY(env, obj);
807
808 JNIHandles::destroy_local(obj);
809
810 HOTSPOT_JNI_DELETELOCALREF_RETURN();
811 JNI_END
812
813 JNI_QUICK_ENTRY(jboolean, jni_IsSameObject(JNIEnv *env, jobject r1, jobject r2))
814 JNIWrapper("IsSameObject");
815
816 HOTSPOT_JNI_ISSAMEOBJECT_ENTRY(env, r1, r2);
817
818 oop a = JNIHandles::resolve(r1);
819 oop b = JNIHandles::resolve(r2);
820 jboolean ret = (a == b) ? JNI_TRUE : JNI_FALSE;
821
822 HOTSPOT_JNI_ISSAMEOBJECT_RETURN(ret);
823 return ret;
824 JNI_END
825
826
827 JNI_ENTRY(jobject, jni_NewLocalRef(JNIEnv *env, jobject ref))
828 JNIWrapper("NewLocalRef");
829
830 HOTSPOT_JNI_NEWLOCALREF_ENTRY(env, ref);
831
832 jobject ret = JNIHandles::make_local(env, JNIHandles::resolve(ref));
833
834 HOTSPOT_JNI_NEWLOCALREF_RETURN(ret);
835 return ret;
836 JNI_END
837
838 JNI_LEAF(jint, jni_EnsureLocalCapacity(JNIEnv *env, jint capacity))
839 JNIWrapper("EnsureLocalCapacity");
840
841 HOTSPOT_JNI_ENSURELOCALCAPACITY_ENTRY(env, capacity);
842
843 jint ret;
844 if (capacity >= 0 &&
845 ((MaxJNILocalCapacity <= 0) || (capacity <= MaxJNILocalCapacity))) {
846 ret = JNI_OK;
847 } else {
848 ret = JNI_ERR;
849 }
850
851 HOTSPOT_JNI_ENSURELOCALCAPACITY_RETURN(ret);
852 return ret;
853 JNI_END
854
855 // Return the Handle Type
856 JNI_LEAF(jobjectRefType, jni_GetObjectRefType(JNIEnv *env, jobject obj))
857 JNIWrapper("GetObjectRefType");
858
859 HOTSPOT_JNI_GETOBJECTREFTYPE_ENTRY(env, obj);
860
861 jobjectRefType ret;
862 if (JNIHandles::is_local_handle(thread, obj) ||
863 JNIHandles::is_frame_handle(thread, obj))
864 ret = JNILocalRefType;
865 else if (JNIHandles::is_global_handle(obj))
866 ret = JNIGlobalRefType;
867 else if (JNIHandles::is_weak_global_handle(obj))
868 ret = JNIWeakGlobalRefType;
869 else
870 ret = JNIInvalidRefType;
871
872 HOTSPOT_JNI_GETOBJECTREFTYPE_RETURN((void *) ret);
873 return ret;
874 JNI_END
875
876
877 class JNI_ArgumentPusher : public SignatureIterator {
878 protected:
879 JavaCallArguments* _arguments;
880
881 virtual void get_bool () = 0;
882 virtual void get_char () = 0;
883 virtual void get_short () = 0;
884 virtual void get_byte () = 0;
885 virtual void get_int () = 0;
886 virtual void get_long () = 0;
887 virtual void get_float () = 0;
888 virtual void get_double () = 0;
889 virtual void get_object () = 0;
890
891 JNI_ArgumentPusher(Symbol* signature) : SignatureIterator(signature) {
892 this->_return_type = T_ILLEGAL;
893 _arguments = NULL;
894 }
895
896 public:
897 virtual void iterate( uint64_t fingerprint ) = 0;
898
899 void set_java_argument_object(JavaCallArguments *arguments) { _arguments = arguments; }
900
901 inline void do_bool() { if (!is_return_type()) get_bool(); }
902 inline void do_char() { if (!is_return_type()) get_char(); }
903 inline void do_short() { if (!is_return_type()) get_short(); }
904 inline void do_byte() { if (!is_return_type()) get_byte(); }
905 inline void do_int() { if (!is_return_type()) get_int(); }
906 inline void do_long() { if (!is_return_type()) get_long(); }
907 inline void do_float() { if (!is_return_type()) get_float(); }
908 inline void do_double() { if (!is_return_type()) get_double(); }
909 inline void do_object(int begin, int end) { if (!is_return_type()) get_object(); }
910 inline void do_array(int begin, int end) { if (!is_return_type()) get_object(); } // do_array uses get_object -- there is no get_array
911 inline void do_void() { }
912
913 JavaCallArguments* arguments() { return _arguments; }
914 void push_receiver(Handle h) { _arguments->push_oop(h); }
915 };
916
917
918 class JNI_ArgumentPusherVaArg : public JNI_ArgumentPusher {
919 protected:
920 va_list _ap;
921
922 inline void get_bool() { _arguments->push_int(va_arg(_ap, jint)); } // bool is coerced to int when using va_arg
923 inline void get_char() { _arguments->push_int(va_arg(_ap, jint)); } // char is coerced to int when using va_arg
924 inline void get_short() { _arguments->push_int(va_arg(_ap, jint)); } // short is coerced to int when using va_arg
925 inline void get_byte() { _arguments->push_int(va_arg(_ap, jint)); } // byte is coerced to int when using va_arg
926 inline void get_int() { _arguments->push_int(va_arg(_ap, jint)); }
927
928 // each of these paths is exercized by the various jck Call[Static,Nonvirtual,][Void,Int,..]Method[A,V,] tests
929
930 inline void get_long() { _arguments->push_long(va_arg(_ap, jlong)); }
931 inline void get_float() { _arguments->push_float((jfloat)va_arg(_ap, jdouble)); } // float is coerced to double w/ va_arg
932 inline void get_double() { _arguments->push_double(va_arg(_ap, jdouble)); }
933 inline void get_object() { jobject l = va_arg(_ap, jobject);
934 _arguments->push_oop(Handle((oop *)l, false)); }
935
936 inline void set_ap(va_list rap) {
937 va_copy(_ap, rap);
938 }
939
940 public:
941 JNI_ArgumentPusherVaArg(Symbol* signature, va_list rap)
942 : JNI_ArgumentPusher(signature) {
943 set_ap(rap);
944 }
945 JNI_ArgumentPusherVaArg(jmethodID method_id, va_list rap)
946 : JNI_ArgumentPusher(Method::resolve_jmethod_id(method_id)->signature()) {
947 set_ap(rap);
948 }
949
950 // Optimized path if we have the bitvector form of signature
951 void iterate( uint64_t fingerprint ) {
952 if (fingerprint == (uint64_t)CONST64(-1)) {
953 SignatureIterator::iterate(); // Must be too many arguments
954 } else {
955 _return_type = (BasicType)((fingerprint >> static_feature_size) &
956 result_feature_mask);
957
958 assert(fingerprint, "Fingerprint should not be 0");
959 fingerprint = fingerprint >> (static_feature_size + result_feature_size);
960 while ( 1 ) {
961 switch ( fingerprint & parameter_feature_mask ) {
962 case bool_parm:
963 case char_parm:
964 case short_parm:
965 case byte_parm:
966 case int_parm:
967 get_int();
968 break;
969 case obj_parm:
970 get_object();
971 break;
972 case long_parm:
973 get_long();
974 break;
975 case float_parm:
976 get_float();
977 break;
978 case double_parm:
979 get_double();
980 break;
981 case done_parm:
982 return;
983 break;
984 default:
985 ShouldNotReachHere();
986 break;
987 }
988 fingerprint >>= parameter_feature_size;
989 }
990 }
991 }
992 };
993
994
995 class JNI_ArgumentPusherArray : public JNI_ArgumentPusher {
996 protected:
997 const jvalue *_ap;
998
999 inline void get_bool() { _arguments->push_int((jint)(_ap++)->z); }
1000 inline void get_char() { _arguments->push_int((jint)(_ap++)->c); }
1001 inline void get_short() { _arguments->push_int((jint)(_ap++)->s); }
1002 inline void get_byte() { _arguments->push_int((jint)(_ap++)->b); }
1003 inline void get_int() { _arguments->push_int((jint)(_ap++)->i); }
1004
1005 inline void get_long() { _arguments->push_long((_ap++)->j); }
1006 inline void get_float() { _arguments->push_float((_ap++)->f); }
1007 inline void get_double() { _arguments->push_double((_ap++)->d);}
1008 inline void get_object() { _arguments->push_oop(Handle((oop *)(_ap++)->l, false)); }
1009
1010 inline void set_ap(const jvalue *rap) { _ap = rap; }
1011
1012 public:
1013 JNI_ArgumentPusherArray(Symbol* signature, const jvalue *rap)
1014 : JNI_ArgumentPusher(signature) {
1015 set_ap(rap);
1016 }
1017 JNI_ArgumentPusherArray(jmethodID method_id, const jvalue *rap)
1018 : JNI_ArgumentPusher(Method::resolve_jmethod_id(method_id)->signature()) {
1019 set_ap(rap);
1020 }
1021
1022 // Optimized path if we have the bitvector form of signature
1023 void iterate( uint64_t fingerprint ) {
1024 if (fingerprint == (uint64_t)CONST64(-1)) {
1025 SignatureIterator::iterate(); // Must be too many arguments
1026 } else {
1027 _return_type = (BasicType)((fingerprint >> static_feature_size) &
1028 result_feature_mask);
1029 assert(fingerprint, "Fingerprint should not be 0");
1030 fingerprint = fingerprint >> (static_feature_size + result_feature_size);
1031 while ( 1 ) {
1032 switch ( fingerprint & parameter_feature_mask ) {
1033 case bool_parm:
1034 get_bool();
1035 break;
1036 case char_parm:
1037 get_char();
1038 break;
1039 case short_parm:
1040 get_short();
1041 break;
1042 case byte_parm:
1043 get_byte();
1044 break;
1045 case int_parm:
1046 get_int();
1047 break;
1048 case obj_parm:
1049 get_object();
1050 break;
1051 case long_parm:
1052 get_long();
1053 break;
1054 case float_parm:
1055 get_float();
1056 break;
1057 case double_parm:
1058 get_double();
1059 break;
1060 case done_parm:
1061 return;
1062 break;
1063 default:
1064 ShouldNotReachHere();
1065 break;
1066 }
1067 fingerprint >>= parameter_feature_size;
1068 }
1069 }
1070 }
1071 };
1072
1073
1074 enum JNICallType {
1075 JNI_STATIC,
1076 JNI_VIRTUAL,
1077 JNI_NONVIRTUAL
1078 };
1079
1080
1081
1082 static void jni_invoke_static(JNIEnv *env, JavaValue* result, jobject receiver, JNICallType call_type, jmethodID method_id, JNI_ArgumentPusher *args, TRAPS) {
1083 methodHandle method(THREAD, Method::resolve_jmethod_id(method_id));
1084
1085 // Create object to hold arguments for the JavaCall, and associate it with
1086 // the jni parser
1087 ResourceMark rm(THREAD);
1088 int number_of_parameters = method->size_of_parameters();
1089 JavaCallArguments java_args(number_of_parameters);
1090 args->set_java_argument_object(&java_args);
1091
1092 assert(method->is_static(), "method should be static");
1093
1094 // Fill out JavaCallArguments object
1095 args->iterate( Fingerprinter(method).fingerprint() );
1096 // Initialize result type
1097 result->set_type(args->get_ret_type());
1098
1099 // Invoke the method. Result is returned as oop.
1100 JavaCalls::call(result, method, &java_args, CHECK);
1101
1102 // Convert result
1103 if (result->get_type() == T_OBJECT || result->get_type() == T_ARRAY) {
1104 result->set_jobject(JNIHandles::make_local(env, (oop) result->get_jobject()));
1105 }
1106 }
1107
1108
1109 static void jni_invoke_nonstatic(JNIEnv *env, JavaValue* result, jobject receiver, JNICallType call_type, jmethodID method_id, JNI_ArgumentPusher *args, TRAPS) {
1110 oop recv = JNIHandles::resolve(receiver);
1111 if (recv == NULL) {
1112 THROW(vmSymbols::java_lang_NullPointerException());
1113 }
1114 Handle h_recv(THREAD, recv);
1115
1116 int number_of_parameters;
1117 Method* selected_method;
1118 {
1119 Method* m = Method::resolve_jmethod_id(method_id);
1120 number_of_parameters = m->size_of_parameters();
1121 Klass* holder = m->method_holder();
1122 if (call_type != JNI_VIRTUAL) {
1123 selected_method = m;
1124 } else if (!m->has_itable_index()) {
1125 // non-interface call -- for that little speed boost, don't handlize
1126 debug_only(NoSafepointVerifier nosafepoint;)
1127 // jni_GetMethodID makes sure class is linked and initialized
1128 // so m should have a valid vtable index.
1129 assert(m->valid_vtable_index(), "no valid vtable index");
1130 int vtbl_index = m->vtable_index();
1131 if (vtbl_index != Method::nonvirtual_vtable_index) {
1132 selected_method = h_recv->klass()->method_at_vtable(vtbl_index);
1133 } else {
1134 // final method
1135 selected_method = m;
1136 }
1137 } else {
1138 // interface call
1139 KlassHandle h_holder(THREAD, holder);
1140
1141 int itbl_index = m->itable_index();
1142 Klass* k = h_recv->klass();
1143 selected_method = InstanceKlass::cast(k)->method_at_itable(h_holder(), itbl_index, CHECK);
1144 }
1145 }
1146
1147 methodHandle method(THREAD, selected_method);
1148
1149 // Create object to hold arguments for the JavaCall, and associate it with
1150 // the jni parser
1151 ResourceMark rm(THREAD);
1152 JavaCallArguments java_args(number_of_parameters);
1153 args->set_java_argument_object(&java_args);
1154
1155 // handle arguments
1156 assert(!method->is_static(), "method should not be static");
1157 args->push_receiver(h_recv); // Push jobject handle
1158
1159 // Fill out JavaCallArguments object
1160 args->iterate( Fingerprinter(method).fingerprint() );
1161 // Initialize result type
1162 result->set_type(args->get_ret_type());
1163
1164 // Invoke the method. Result is returned as oop.
1165 JavaCalls::call(result, method, &java_args, CHECK);
1166
1167 // Convert result
1168 if (result->get_type() == T_OBJECT || result->get_type() == T_ARRAY) {
1169 result->set_jobject(JNIHandles::make_local(env, (oop) result->get_jobject()));
1170 }
1171 }
1172
1173
1174 static instanceOop alloc_object(jclass clazz, TRAPS) {
1175 KlassHandle k(THREAD, java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz)));
1176 if (k == NULL) {
1177 ResourceMark rm(THREAD);
1178 THROW_(vmSymbols::java_lang_InstantiationException(), NULL);
1179 }
1180 k()->check_valid_for_instantiation(false, CHECK_NULL);
1181 InstanceKlass::cast(k())->initialize(CHECK_NULL);
1182 instanceOop ih = InstanceKlass::cast(k())->allocate_instance(THREAD);
1183 return ih;
1184 }
1185
1186 DT_RETURN_MARK_DECL(AllocObject, jobject
1187 , HOTSPOT_JNI_ALLOCOBJECT_RETURN(_ret_ref));
1188
1189 JNI_ENTRY(jobject, jni_AllocObject(JNIEnv *env, jclass clazz))
1190 JNIWrapper("AllocObject");
1191
1192 HOTSPOT_JNI_ALLOCOBJECT_ENTRY(env, clazz);
1193
1194 jobject ret = NULL;
1195 DT_RETURN_MARK(AllocObject, jobject, (const jobject&)ret);
1196
1197 instanceOop i = alloc_object(clazz, CHECK_NULL);
1198 ret = JNIHandles::make_local(env, i);
1199 return ret;
1200 JNI_END
1201
1202 DT_RETURN_MARK_DECL(NewObjectA, jobject
1203 , HOTSPOT_JNI_NEWOBJECTA_RETURN(_ret_ref));
1204
1205 JNI_ENTRY(jobject, jni_NewObjectA(JNIEnv *env, jclass clazz, jmethodID methodID, const jvalue *args))
1206 JNIWrapper("NewObjectA");
1207
1208 HOTSPOT_JNI_NEWOBJECTA_ENTRY(env, clazz, (uintptr_t) methodID);
1209
1210 jobject obj = NULL;
1211 DT_RETURN_MARK(NewObjectA, jobject, (const jobject)obj);
1212
1213 instanceOop i = alloc_object(clazz, CHECK_NULL);
1214 obj = JNIHandles::make_local(env, i);
1215 JavaValue jvalue(T_VOID);
1216 JNI_ArgumentPusherArray ap(methodID, args);
1217 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_NULL);
1218 return obj;
1219 JNI_END
1220
1221
1222 DT_RETURN_MARK_DECL(NewObjectV, jobject
1223 , HOTSPOT_JNI_NEWOBJECTV_RETURN(_ret_ref));
1224
1225 JNI_ENTRY(jobject, jni_NewObjectV(JNIEnv *env, jclass clazz, jmethodID methodID, va_list args))
1226 JNIWrapper("NewObjectV");
1227
1228 HOTSPOT_JNI_NEWOBJECTV_ENTRY(env, clazz, (uintptr_t) methodID);
1229
1230 jobject obj = NULL;
1231 DT_RETURN_MARK(NewObjectV, jobject, (const jobject&)obj);
1232
1233 instanceOop i = alloc_object(clazz, CHECK_NULL);
1234 obj = JNIHandles::make_local(env, i);
1235 JavaValue jvalue(T_VOID);
1236 JNI_ArgumentPusherVaArg ap(methodID, args);
1237 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_NULL);
1238 return obj;
1239 JNI_END
1240
1241
1242 DT_RETURN_MARK_DECL(NewObject, jobject
1243 , HOTSPOT_JNI_NEWOBJECT_RETURN(_ret_ref));
1244
1245 JNI_ENTRY(jobject, jni_NewObject(JNIEnv *env, jclass clazz, jmethodID methodID, ...))
1246 JNIWrapper("NewObject");
1247
1248 HOTSPOT_JNI_NEWOBJECT_ENTRY(env, clazz, (uintptr_t) methodID);
1249
1250 jobject obj = NULL;
1251 DT_RETURN_MARK(NewObject, jobject, (const jobject&)obj);
1252
1253 instanceOop i = alloc_object(clazz, CHECK_NULL);
1254 obj = JNIHandles::make_local(env, i);
1255 va_list args;
1256 va_start(args, methodID);
1257 JavaValue jvalue(T_VOID);
1258 JNI_ArgumentPusherVaArg ap(methodID, args);
1259 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_NULL);
1260 va_end(args);
1261 return obj;
1262 JNI_END
1263
1264
1265 JNI_ENTRY(jclass, jni_GetObjectClass(JNIEnv *env, jobject obj))
1266 JNIWrapper("GetObjectClass");
1267
1268 HOTSPOT_JNI_GETOBJECTCLASS_ENTRY(env, obj);
1269
1270 Klass* k = JNIHandles::resolve_non_null(obj)->klass();
1271 jclass ret =
1272 (jclass) JNIHandles::make_local(env, k->java_mirror());
1273
1274 HOTSPOT_JNI_GETOBJECTCLASS_RETURN(ret);
1275 return ret;
1276 JNI_END
1277
1278 JNI_QUICK_ENTRY(jboolean, jni_IsInstanceOf(JNIEnv *env, jobject obj, jclass clazz))
1279 JNIWrapper("IsInstanceOf");
1280
1281 HOTSPOT_JNI_ISINSTANCEOF_ENTRY(env, obj, clazz);
1282
1283 jboolean ret = JNI_TRUE;
1284 if (obj != NULL) {
1285 ret = JNI_FALSE;
1286 Klass* k = java_lang_Class::as_Klass(
1287 JNIHandles::resolve_non_null(clazz));
1288 if (k != NULL) {
1289 ret = JNIHandles::resolve_non_null(obj)->is_a(k) ? JNI_TRUE : JNI_FALSE;
1290 }
1291 }
1292
1293 HOTSPOT_JNI_ISINSTANCEOF_RETURN(ret);
1294 return ret;
1295 JNI_END
1296
1297
1298 static jmethodID get_method_id(JNIEnv *env, jclass clazz, const char *name_str,
1299 const char *sig, bool is_static, TRAPS) {
1300 // %%%% This code should probably just call into a method in the LinkResolver
1301 //
1302 // The class should have been loaded (we have an instance of the class
1303 // passed in) so the method and signature should already be in the symbol
1304 // table. If they're not there, the method doesn't exist.
1305 const char *name_to_probe = (name_str == NULL)
1306 ? vmSymbols::object_initializer_name()->as_C_string()
1307 : name_str;
1308 TempNewSymbol name = SymbolTable::probe(name_to_probe, (int)strlen(name_to_probe));
1309 TempNewSymbol signature = SymbolTable::probe(sig, (int)strlen(sig));
1310
1311 if (name == NULL || signature == NULL) {
1312 THROW_MSG_0(vmSymbols::java_lang_NoSuchMethodError(), name_str);
1313 }
1314
1315 // Throw a NoSuchMethodError exception if we have an instance of a
1316 // primitive java.lang.Class
1317 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(clazz))) {
1318 THROW_MSG_0(vmSymbols::java_lang_NoSuchMethodError(), name_str);
1319 }
1320
1321 KlassHandle klass(THREAD,
1322 java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz)));
1323
1324 // Make sure class is linked and initialized before handing id's out to
1325 // Method*s.
1326 klass()->initialize(CHECK_NULL);
1327
1328 Method* m;
1329 if (name == vmSymbols::object_initializer_name() ||
1330 name == vmSymbols::class_initializer_name()) {
1331 // Never search superclasses for constructors
1332 if (klass->is_instance_klass()) {
1333 m = InstanceKlass::cast(klass())->find_method(name, signature);
1334 } else {
1335 m = NULL;
1336 }
1337 } else {
1338 m = klass->lookup_method(name, signature);
1339 if (m == NULL && klass->is_instance_klass()) {
1340 m = InstanceKlass::cast(klass())->lookup_method_in_ordered_interfaces(name, signature);
1341 }
1342 }
1343 if (m == NULL || (m->is_static() != is_static)) {
1344 THROW_MSG_0(vmSymbols::java_lang_NoSuchMethodError(), name_str);
1345 }
1346 return m->jmethod_id();
1347 }
1348
1349
1350 JNI_ENTRY(jmethodID, jni_GetMethodID(JNIEnv *env, jclass clazz,
1351 const char *name, const char *sig))
1352 JNIWrapper("GetMethodID");
1353 HOTSPOT_JNI_GETMETHODID_ENTRY(env, clazz, (char *) name, (char *) sig);
1354 jmethodID ret = get_method_id(env, clazz, name, sig, false, thread);
1355 HOTSPOT_JNI_GETMETHODID_RETURN((uintptr_t) ret);
1356 return ret;
1357 JNI_END
1358
1359
1360 JNI_ENTRY(jmethodID, jni_GetStaticMethodID(JNIEnv *env, jclass clazz,
1361 const char *name, const char *sig))
1362 JNIWrapper("GetStaticMethodID");
1363 HOTSPOT_JNI_GETSTATICMETHODID_ENTRY(env, (char *) clazz, (char *) name, (char *)sig);
1364 jmethodID ret = get_method_id(env, clazz, name, sig, true, thread);
1365 HOTSPOT_JNI_GETSTATICMETHODID_RETURN((uintptr_t) ret);
1366 return ret;
1367 JNI_END
1368
1369
1370
1371 //
1372 // Calling Methods
1373 //
1374
1375
1376 #define DEFINE_CALLMETHOD(ResultType, Result, Tag \
1377 , EntryProbe, ReturnProbe) \
1378 \
1379 DT_RETURN_MARK_DECL_FOR(Result, Call##Result##Method, ResultType \
1380 , ReturnProbe); \
1381 \
1382 JNI_ENTRY(ResultType, \
1383 jni_Call##Result##Method(JNIEnv *env, jobject obj, jmethodID methodID, ...)) \
1384 JNIWrapper("Call" XSTR(Result) "Method"); \
1385 \
1386 EntryProbe; \
1387 ResultType ret = 0;\
1388 DT_RETURN_MARK_FOR(Result, Call##Result##Method, ResultType, \
1389 (const ResultType&)ret);\
1390 \
1391 va_list args; \
1392 va_start(args, methodID); \
1393 JavaValue jvalue(Tag); \
1394 JNI_ArgumentPusherVaArg ap(methodID, args); \
1395 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK_0); \
1396 va_end(args); \
1397 ret = jvalue.get_##ResultType(); \
1398 return ret;\
1399 JNI_END
1400
1401 // the runtime type of subword integral basic types is integer
1402 DEFINE_CALLMETHOD(jboolean, Boolean, T_BOOLEAN
1403 , HOTSPOT_JNI_CALLBOOLEANMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1404 HOTSPOT_JNI_CALLBOOLEANMETHOD_RETURN(_ret_ref))
1405 DEFINE_CALLMETHOD(jbyte, Byte, T_BYTE
1406 , HOTSPOT_JNI_CALLBYTEMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1407 HOTSPOT_JNI_CALLBYTEMETHOD_RETURN(_ret_ref))
1408 DEFINE_CALLMETHOD(jchar, Char, T_CHAR
1409 , HOTSPOT_JNI_CALLCHARMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1410 HOTSPOT_JNI_CALLCHARMETHOD_RETURN(_ret_ref))
1411 DEFINE_CALLMETHOD(jshort, Short, T_SHORT
1412 , HOTSPOT_JNI_CALLSHORTMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1413 HOTSPOT_JNI_CALLSHORTMETHOD_RETURN(_ret_ref))
1414
1415 DEFINE_CALLMETHOD(jobject, Object, T_OBJECT
1416 , HOTSPOT_JNI_CALLOBJECTMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1417 HOTSPOT_JNI_CALLOBJECTMETHOD_RETURN(_ret_ref))
1418 DEFINE_CALLMETHOD(jint, Int, T_INT,
1419 HOTSPOT_JNI_CALLINTMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1420 HOTSPOT_JNI_CALLINTMETHOD_RETURN(_ret_ref))
1421 DEFINE_CALLMETHOD(jlong, Long, T_LONG
1422 , HOTSPOT_JNI_CALLLONGMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1423 HOTSPOT_JNI_CALLLONGMETHOD_RETURN(_ret_ref))
1424 // Float and double probes don't return value because dtrace doesn't currently support it
1425 DEFINE_CALLMETHOD(jfloat, Float, T_FLOAT
1426 , HOTSPOT_JNI_CALLFLOATMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1427 HOTSPOT_JNI_CALLFLOATMETHOD_RETURN())
1428 DEFINE_CALLMETHOD(jdouble, Double, T_DOUBLE
1429 , HOTSPOT_JNI_CALLDOUBLEMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1430 HOTSPOT_JNI_CALLDOUBLEMETHOD_RETURN())
1431
1432 #define DEFINE_CALLMETHODV(ResultType, Result, Tag \
1433 , EntryProbe, ReturnProbe) \
1434 \
1435 DT_RETURN_MARK_DECL_FOR(Result, Call##Result##MethodV, ResultType \
1436 , ReturnProbe); \
1437 \
1438 JNI_ENTRY(ResultType, \
1439 jni_Call##Result##MethodV(JNIEnv *env, jobject obj, jmethodID methodID, va_list args)) \
1440 JNIWrapper("Call" XSTR(Result) "MethodV"); \
1441 \
1442 EntryProbe;\
1443 ResultType ret = 0;\
1444 DT_RETURN_MARK_FOR(Result, Call##Result##MethodV, ResultType, \
1445 (const ResultType&)ret);\
1446 \
1447 JavaValue jvalue(Tag); \
1448 JNI_ArgumentPusherVaArg ap(methodID, args); \
1449 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK_0); \
1450 ret = jvalue.get_##ResultType(); \
1451 return ret;\
1452 JNI_END
1453
1454 // the runtime type of subword integral basic types is integer
1455 DEFINE_CALLMETHODV(jboolean, Boolean, T_BOOLEAN
1456 , HOTSPOT_JNI_CALLBOOLEANMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1457 HOTSPOT_JNI_CALLBOOLEANMETHODV_RETURN(_ret_ref))
1458 DEFINE_CALLMETHODV(jbyte, Byte, T_BYTE
1459 , HOTSPOT_JNI_CALLBYTEMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1460 HOTSPOT_JNI_CALLBYTEMETHODV_RETURN(_ret_ref))
1461 DEFINE_CALLMETHODV(jchar, Char, T_CHAR
1462 , HOTSPOT_JNI_CALLCHARMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1463 HOTSPOT_JNI_CALLCHARMETHODV_RETURN(_ret_ref))
1464 DEFINE_CALLMETHODV(jshort, Short, T_SHORT
1465 , HOTSPOT_JNI_CALLSHORTMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1466 HOTSPOT_JNI_CALLSHORTMETHODV_RETURN(_ret_ref))
1467
1468 DEFINE_CALLMETHODV(jobject, Object, T_OBJECT
1469 , HOTSPOT_JNI_CALLOBJECTMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1470 HOTSPOT_JNI_CALLOBJECTMETHODV_RETURN(_ret_ref))
1471 DEFINE_CALLMETHODV(jint, Int, T_INT,
1472 HOTSPOT_JNI_CALLINTMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1473 HOTSPOT_JNI_CALLINTMETHODV_RETURN(_ret_ref))
1474 DEFINE_CALLMETHODV(jlong, Long, T_LONG
1475 , HOTSPOT_JNI_CALLLONGMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1476 HOTSPOT_JNI_CALLLONGMETHODV_RETURN(_ret_ref))
1477 // Float and double probes don't return value because dtrace doesn't currently support it
1478 DEFINE_CALLMETHODV(jfloat, Float, T_FLOAT
1479 , HOTSPOT_JNI_CALLFLOATMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1480 HOTSPOT_JNI_CALLFLOATMETHODV_RETURN())
1481 DEFINE_CALLMETHODV(jdouble, Double, T_DOUBLE
1482 , HOTSPOT_JNI_CALLDOUBLEMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1483 HOTSPOT_JNI_CALLDOUBLEMETHODV_RETURN())
1484
1485 #define DEFINE_CALLMETHODA(ResultType, Result, Tag \
1486 , EntryProbe, ReturnProbe) \
1487 \
1488 DT_RETURN_MARK_DECL_FOR(Result, Call##Result##MethodA, ResultType \
1489 , ReturnProbe); \
1490 \
1491 JNI_ENTRY(ResultType, \
1492 jni_Call##Result##MethodA(JNIEnv *env, jobject obj, jmethodID methodID, const jvalue *args)) \
1493 JNIWrapper("Call" XSTR(Result) "MethodA"); \
1494 EntryProbe; \
1495 ResultType ret = 0;\
1496 DT_RETURN_MARK_FOR(Result, Call##Result##MethodA, ResultType, \
1497 (const ResultType&)ret);\
1498 \
1499 JavaValue jvalue(Tag); \
1500 JNI_ArgumentPusherArray ap(methodID, args); \
1501 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK_0); \
1502 ret = jvalue.get_##ResultType(); \
1503 return ret;\
1504 JNI_END
1505
1506 // the runtime type of subword integral basic types is integer
1507 DEFINE_CALLMETHODA(jboolean, Boolean, T_BOOLEAN
1508 , HOTSPOT_JNI_CALLBOOLEANMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1509 HOTSPOT_JNI_CALLBOOLEANMETHODA_RETURN(_ret_ref))
1510 DEFINE_CALLMETHODA(jbyte, Byte, T_BYTE
1511 , HOTSPOT_JNI_CALLBYTEMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1512 HOTSPOT_JNI_CALLBYTEMETHODA_RETURN(_ret_ref))
1513 DEFINE_CALLMETHODA(jchar, Char, T_CHAR
1514 , HOTSPOT_JNI_CALLCHARMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1515 HOTSPOT_JNI_CALLCHARMETHODA_RETURN(_ret_ref))
1516 DEFINE_CALLMETHODA(jshort, Short, T_SHORT
1517 , HOTSPOT_JNI_CALLSHORTMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1518 HOTSPOT_JNI_CALLSHORTMETHODA_RETURN(_ret_ref))
1519
1520 DEFINE_CALLMETHODA(jobject, Object, T_OBJECT
1521 , HOTSPOT_JNI_CALLOBJECTMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1522 HOTSPOT_JNI_CALLOBJECTMETHODA_RETURN(_ret_ref))
1523 DEFINE_CALLMETHODA(jint, Int, T_INT,
1524 HOTSPOT_JNI_CALLINTMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1525 HOTSPOT_JNI_CALLINTMETHODA_RETURN(_ret_ref))
1526 DEFINE_CALLMETHODA(jlong, Long, T_LONG
1527 , HOTSPOT_JNI_CALLLONGMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1528 HOTSPOT_JNI_CALLLONGMETHODA_RETURN(_ret_ref))
1529 // Float and double probes don't return value because dtrace doesn't currently support it
1530 DEFINE_CALLMETHODA(jfloat, Float, T_FLOAT
1531 , HOTSPOT_JNI_CALLFLOATMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1532 HOTSPOT_JNI_CALLFLOATMETHODA_RETURN())
1533 DEFINE_CALLMETHODA(jdouble, Double, T_DOUBLE
1534 , HOTSPOT_JNI_CALLDOUBLEMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1535 HOTSPOT_JNI_CALLDOUBLEMETHODA_RETURN())
1536
1537 DT_VOID_RETURN_MARK_DECL(CallVoidMethod, HOTSPOT_JNI_CALLVOIDMETHOD_RETURN());
1538 DT_VOID_RETURN_MARK_DECL(CallVoidMethodV, HOTSPOT_JNI_CALLVOIDMETHODV_RETURN());
1539 DT_VOID_RETURN_MARK_DECL(CallVoidMethodA, HOTSPOT_JNI_CALLVOIDMETHODA_RETURN());
1540
1541
1542 JNI_ENTRY(void, jni_CallVoidMethod(JNIEnv *env, jobject obj, jmethodID methodID, ...))
1543 JNIWrapper("CallVoidMethod");
1544 HOTSPOT_JNI_CALLVOIDMETHOD_ENTRY(env, obj, (uintptr_t) methodID);
1545 DT_VOID_RETURN_MARK(CallVoidMethod);
1546
1547 va_list args;
1548 va_start(args, methodID);
1549 JavaValue jvalue(T_VOID);
1550 JNI_ArgumentPusherVaArg ap(methodID, args);
1551 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK);
1552 va_end(args);
1553 JNI_END
1554
1555
1556 JNI_ENTRY(void, jni_CallVoidMethodV(JNIEnv *env, jobject obj, jmethodID methodID, va_list args))
1557 JNIWrapper("CallVoidMethodV");
1558 HOTSPOT_JNI_CALLVOIDMETHODV_ENTRY(env, obj, (uintptr_t) methodID);
1559 DT_VOID_RETURN_MARK(CallVoidMethodV);
1560
1561 JavaValue jvalue(T_VOID);
1562 JNI_ArgumentPusherVaArg ap(methodID, args);
1563 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK);
1564 JNI_END
1565
1566
1567 JNI_ENTRY(void, jni_CallVoidMethodA(JNIEnv *env, jobject obj, jmethodID methodID, const jvalue *args))
1568 JNIWrapper("CallVoidMethodA");
1569 HOTSPOT_JNI_CALLVOIDMETHODA_ENTRY(env, obj, (uintptr_t) methodID);
1570 DT_VOID_RETURN_MARK(CallVoidMethodA);
1571
1572 JavaValue jvalue(T_VOID);
1573 JNI_ArgumentPusherArray ap(methodID, args);
1574 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK);
1575 JNI_END
1576
1577
1578
1579 #define DEFINE_CALLNONVIRTUALMETHOD(ResultType, Result, Tag \
1580 , EntryProbe, ReturnProbe) \
1581 \
1582 DT_RETURN_MARK_DECL_FOR(Result, CallNonvirtual##Result##Method, ResultType \
1583 , ReturnProbe);\
1584 \
1585 JNI_ENTRY(ResultType, \
1586 jni_CallNonvirtual##Result##Method(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, ...)) \
1587 JNIWrapper("CallNonvitual" XSTR(Result) "Method"); \
1588 \
1589 EntryProbe;\
1590 ResultType ret;\
1591 DT_RETURN_MARK_FOR(Result, CallNonvirtual##Result##Method, ResultType, \
1592 (const ResultType&)ret);\
1593 \
1594 va_list args; \
1595 va_start(args, methodID); \
1596 JavaValue jvalue(Tag); \
1597 JNI_ArgumentPusherVaArg ap(methodID, args); \
1598 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_0); \
1599 va_end(args); \
1600 ret = jvalue.get_##ResultType(); \
1601 return ret;\
1602 JNI_END
1603
1604 // the runtime type of subword integral basic types is integer
1605 DEFINE_CALLNONVIRTUALMETHOD(jboolean, Boolean, T_BOOLEAN
1606 , HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1607 HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHOD_RETURN(_ret_ref))
1608 DEFINE_CALLNONVIRTUALMETHOD(jbyte, Byte, T_BYTE
1609 , HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1610 HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHOD_RETURN(_ret_ref))
1611 DEFINE_CALLNONVIRTUALMETHOD(jchar, Char, T_CHAR
1612 , HOTSPOT_JNI_CALLNONVIRTUALCHARMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1613 HOTSPOT_JNI_CALLNONVIRTUALCHARMETHOD_RETURN(_ret_ref))
1614 DEFINE_CALLNONVIRTUALMETHOD(jshort, Short, T_SHORT
1615 , HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1616 HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHOD_RETURN(_ret_ref))
1617
1618 DEFINE_CALLNONVIRTUALMETHOD(jobject, Object, T_OBJECT
1619 , HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1620 HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHOD_RETURN(_ret_ref))
1621 DEFINE_CALLNONVIRTUALMETHOD(jint, Int, T_INT
1622 , HOTSPOT_JNI_CALLNONVIRTUALINTMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1623 HOTSPOT_JNI_CALLNONVIRTUALINTMETHOD_RETURN(_ret_ref))
1624 DEFINE_CALLNONVIRTUALMETHOD(jlong, Long, T_LONG
1625 , HOTSPOT_JNI_CALLNONVIRTUALLONGMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1626 // Float and double probes don't return value because dtrace doesn't currently support it
1627 HOTSPOT_JNI_CALLNONVIRTUALLONGMETHOD_RETURN(_ret_ref))
1628 DEFINE_CALLNONVIRTUALMETHOD(jfloat, Float, T_FLOAT
1629 , HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1630 HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHOD_RETURN())
1631 DEFINE_CALLNONVIRTUALMETHOD(jdouble, Double, T_DOUBLE
1632 , HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1633 HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHOD_RETURN())
1634
1635 #define DEFINE_CALLNONVIRTUALMETHODV(ResultType, Result, Tag \
1636 , EntryProbe, ReturnProbe) \
1637 \
1638 DT_RETURN_MARK_DECL_FOR(Result, CallNonvirtual##Result##MethodV, ResultType \
1639 , ReturnProbe);\
1640 \
1641 JNI_ENTRY(ResultType, \
1642 jni_CallNonvirtual##Result##MethodV(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, va_list args)) \
1643 JNIWrapper("CallNonvitual" XSTR(Result) "MethodV"); \
1644 \
1645 EntryProbe;\
1646 ResultType ret;\
1647 DT_RETURN_MARK_FOR(Result, CallNonvirtual##Result##MethodV, ResultType, \
1648 (const ResultType&)ret);\
1649 \
1650 JavaValue jvalue(Tag); \
1651 JNI_ArgumentPusherVaArg ap(methodID, args); \
1652 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_0); \
1653 ret = jvalue.get_##ResultType(); \
1654 return ret;\
1655 JNI_END
1656
1657 // the runtime type of subword integral basic types is integer
1658 DEFINE_CALLNONVIRTUALMETHODV(jboolean, Boolean, T_BOOLEAN
1659 , HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1660 HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHODV_RETURN(_ret_ref))
1661 DEFINE_CALLNONVIRTUALMETHODV(jbyte, Byte, T_BYTE
1662 , HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1663 HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHODV_RETURN(_ret_ref))
1664 DEFINE_CALLNONVIRTUALMETHODV(jchar, Char, T_CHAR
1665 , HOTSPOT_JNI_CALLNONVIRTUALCHARMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1666 HOTSPOT_JNI_CALLNONVIRTUALCHARMETHODV_RETURN(_ret_ref))
1667 DEFINE_CALLNONVIRTUALMETHODV(jshort, Short, T_SHORT
1668 , HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1669 HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHODV_RETURN(_ret_ref))
1670
1671 DEFINE_CALLNONVIRTUALMETHODV(jobject, Object, T_OBJECT
1672 , HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1673 HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHODV_RETURN(_ret_ref))
1674 DEFINE_CALLNONVIRTUALMETHODV(jint, Int, T_INT
1675 , HOTSPOT_JNI_CALLNONVIRTUALINTMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1676 HOTSPOT_JNI_CALLNONVIRTUALINTMETHODV_RETURN(_ret_ref))
1677 DEFINE_CALLNONVIRTUALMETHODV(jlong, Long, T_LONG
1678 , HOTSPOT_JNI_CALLNONVIRTUALLONGMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1679 // Float and double probes don't return value because dtrace doesn't currently support it
1680 HOTSPOT_JNI_CALLNONVIRTUALLONGMETHODV_RETURN(_ret_ref))
1681 DEFINE_CALLNONVIRTUALMETHODV(jfloat, Float, T_FLOAT
1682 , HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1683 HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHODV_RETURN())
1684 DEFINE_CALLNONVIRTUALMETHODV(jdouble, Double, T_DOUBLE
1685 , HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1686 HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHODV_RETURN())
1687
1688 #define DEFINE_CALLNONVIRTUALMETHODA(ResultType, Result, Tag \
1689 , EntryProbe, ReturnProbe) \
1690 \
1691 DT_RETURN_MARK_DECL_FOR(Result, CallNonvirtual##Result##MethodA, ResultType \
1692 , ReturnProbe);\
1693 \
1694 JNI_ENTRY(ResultType, \
1695 jni_CallNonvirtual##Result##MethodA(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, const jvalue *args)) \
1696 JNIWrapper("CallNonvitual" XSTR(Result) "MethodA"); \
1697 \
1698 EntryProbe;\
1699 ResultType ret;\
1700 DT_RETURN_MARK_FOR(Result, CallNonvirtual##Result##MethodA, ResultType, \
1701 (const ResultType&)ret);\
1702 \
1703 JavaValue jvalue(Tag); \
1704 JNI_ArgumentPusherArray ap(methodID, args); \
1705 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_0); \
1706 ret = jvalue.get_##ResultType(); \
1707 return ret;\
1708 JNI_END
1709
1710 // the runtime type of subword integral basic types is integer
1711 DEFINE_CALLNONVIRTUALMETHODA(jboolean, Boolean, T_BOOLEAN
1712 , HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1713 HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHODA_RETURN(_ret_ref))
1714 DEFINE_CALLNONVIRTUALMETHODA(jbyte, Byte, T_BYTE
1715 , HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1716 HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHODA_RETURN(_ret_ref))
1717 DEFINE_CALLNONVIRTUALMETHODA(jchar, Char, T_CHAR
1718 , HOTSPOT_JNI_CALLNONVIRTUALCHARMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1719 HOTSPOT_JNI_CALLNONVIRTUALCHARMETHODA_RETURN(_ret_ref))
1720 DEFINE_CALLNONVIRTUALMETHODA(jshort, Short, T_SHORT
1721 , HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1722 HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHODA_RETURN(_ret_ref))
1723
1724 DEFINE_CALLNONVIRTUALMETHODA(jobject, Object, T_OBJECT
1725 , HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1726 HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHODA_RETURN(_ret_ref))
1727 DEFINE_CALLNONVIRTUALMETHODA(jint, Int, T_INT
1728 , HOTSPOT_JNI_CALLNONVIRTUALINTMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1729 HOTSPOT_JNI_CALLNONVIRTUALINTMETHODA_RETURN(_ret_ref))
1730 DEFINE_CALLNONVIRTUALMETHODA(jlong, Long, T_LONG
1731 , HOTSPOT_JNI_CALLNONVIRTUALLONGMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1732 // Float and double probes don't return value because dtrace doesn't currently support it
1733 HOTSPOT_JNI_CALLNONVIRTUALLONGMETHODA_RETURN(_ret_ref))
1734 DEFINE_CALLNONVIRTUALMETHODA(jfloat, Float, T_FLOAT
1735 , HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1736 HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHODA_RETURN())
1737 DEFINE_CALLNONVIRTUALMETHODA(jdouble, Double, T_DOUBLE
1738 , HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1739 HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHODA_RETURN())
1740
1741 DT_VOID_RETURN_MARK_DECL(CallNonvirtualVoidMethod
1742 , HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHOD_RETURN());
1743 DT_VOID_RETURN_MARK_DECL(CallNonvirtualVoidMethodV
1744 , HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHODV_RETURN());
1745 DT_VOID_RETURN_MARK_DECL(CallNonvirtualVoidMethodA
1746 , HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHODA_RETURN());
1747
1748 JNI_ENTRY(void, jni_CallNonvirtualVoidMethod(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, ...))
1749 JNIWrapper("CallNonvirtualVoidMethod");
1750
1751 HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHOD_ENTRY(env, obj, cls, (uintptr_t) methodID);
1752 DT_VOID_RETURN_MARK(CallNonvirtualVoidMethod);
1753
1754 va_list args;
1755 va_start(args, methodID);
1756 JavaValue jvalue(T_VOID);
1757 JNI_ArgumentPusherVaArg ap(methodID, args);
1758 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK);
1759 va_end(args);
1760 JNI_END
1761
1762
1763 JNI_ENTRY(void, jni_CallNonvirtualVoidMethodV(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, va_list args))
1764 JNIWrapper("CallNonvirtualVoidMethodV");
1765
1766 HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHODV_ENTRY(
1767 env, obj, cls, (uintptr_t) methodID);
1768 DT_VOID_RETURN_MARK(CallNonvirtualVoidMethodV);
1769
1770 JavaValue jvalue(T_VOID);
1771 JNI_ArgumentPusherVaArg ap(methodID, args);
1772 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK);
1773 JNI_END
1774
1775
1776 JNI_ENTRY(void, jni_CallNonvirtualVoidMethodA(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, const jvalue *args))
1777 JNIWrapper("CallNonvirtualVoidMethodA");
1778 HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHODA_ENTRY(
1779 env, obj, cls, (uintptr_t) methodID);
1780 DT_VOID_RETURN_MARK(CallNonvirtualVoidMethodA);
1781 JavaValue jvalue(T_VOID);
1782 JNI_ArgumentPusherArray ap(methodID, args);
1783 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK);
1784 JNI_END
1785
1786
1787
1788 #define DEFINE_CALLSTATICMETHOD(ResultType, Result, Tag \
1789 , EntryProbe, ResultProbe) \
1790 \
1791 DT_RETURN_MARK_DECL_FOR(Result, CallStatic##Result##Method, ResultType \
1792 , ResultProbe); \
1793 \
1794 JNI_ENTRY(ResultType, \
1795 jni_CallStatic##Result##Method(JNIEnv *env, jclass cls, jmethodID methodID, ...)) \
1796 JNIWrapper("CallStatic" XSTR(Result) "Method"); \
1797 \
1798 EntryProbe; \
1799 ResultType ret = 0;\
1800 DT_RETURN_MARK_FOR(Result, CallStatic##Result##Method, ResultType, \
1801 (const ResultType&)ret);\
1802 \
1803 va_list args; \
1804 va_start(args, methodID); \
1805 JavaValue jvalue(Tag); \
1806 JNI_ArgumentPusherVaArg ap(methodID, args); \
1807 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK_0); \
1808 va_end(args); \
1809 ret = jvalue.get_##ResultType(); \
1810 return ret;\
1811 JNI_END
1812
1813 // the runtime type of subword integral basic types is integer
1814 DEFINE_CALLSTATICMETHOD(jboolean, Boolean, T_BOOLEAN
1815 , HOTSPOT_JNI_CALLSTATICBOOLEANMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1816 HOTSPOT_JNI_CALLSTATICBOOLEANMETHOD_RETURN(_ret_ref));
1817 DEFINE_CALLSTATICMETHOD(jbyte, Byte, T_BYTE
1818 , HOTSPOT_JNI_CALLSTATICBYTEMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1819 HOTSPOT_JNI_CALLSTATICBYTEMETHOD_RETURN(_ret_ref));
1820 DEFINE_CALLSTATICMETHOD(jchar, Char, T_CHAR
1821 , HOTSPOT_JNI_CALLSTATICCHARMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1822 HOTSPOT_JNI_CALLSTATICCHARMETHOD_RETURN(_ret_ref));
1823 DEFINE_CALLSTATICMETHOD(jshort, Short, T_SHORT
1824 , HOTSPOT_JNI_CALLSTATICSHORTMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1825 HOTSPOT_JNI_CALLSTATICSHORTMETHOD_RETURN(_ret_ref));
1826
1827 DEFINE_CALLSTATICMETHOD(jobject, Object, T_OBJECT
1828 , HOTSPOT_JNI_CALLSTATICOBJECTMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1829 HOTSPOT_JNI_CALLSTATICOBJECTMETHOD_RETURN(_ret_ref));
1830 DEFINE_CALLSTATICMETHOD(jint, Int, T_INT
1831 , HOTSPOT_JNI_CALLSTATICINTMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1832 HOTSPOT_JNI_CALLSTATICINTMETHOD_RETURN(_ret_ref));
1833 DEFINE_CALLSTATICMETHOD(jlong, Long, T_LONG
1834 , HOTSPOT_JNI_CALLSTATICLONGMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1835 HOTSPOT_JNI_CALLSTATICLONGMETHOD_RETURN(_ret_ref));
1836 // Float and double probes don't return value because dtrace doesn't currently support it
1837 DEFINE_CALLSTATICMETHOD(jfloat, Float, T_FLOAT
1838 , HOTSPOT_JNI_CALLSTATICFLOATMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1839 HOTSPOT_JNI_CALLSTATICFLOATMETHOD_RETURN());
1840 DEFINE_CALLSTATICMETHOD(jdouble, Double, T_DOUBLE
1841 , HOTSPOT_JNI_CALLSTATICDOUBLEMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1842 HOTSPOT_JNI_CALLSTATICDOUBLEMETHOD_RETURN());
1843
1844 #define DEFINE_CALLSTATICMETHODV(ResultType, Result, Tag \
1845 , EntryProbe, ResultProbe) \
1846 \
1847 DT_RETURN_MARK_DECL_FOR(Result, CallStatic##Result##MethodV, ResultType \
1848 , ResultProbe); \
1849 \
1850 JNI_ENTRY(ResultType, \
1851 jni_CallStatic##Result##MethodV(JNIEnv *env, jclass cls, jmethodID methodID, va_list args)) \
1852 JNIWrapper("CallStatic" XSTR(Result) "MethodV"); \
1853 \
1854 EntryProbe; \
1855 ResultType ret = 0;\
1856 DT_RETURN_MARK_FOR(Result, CallStatic##Result##MethodV, ResultType, \
1857 (const ResultType&)ret);\
1858 \
1859 JavaValue jvalue(Tag); \
1860 JNI_ArgumentPusherVaArg ap(methodID, args); \
1861 /* Make sure class is initialized before trying to invoke its method */ \
1862 KlassHandle k(THREAD, java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls))); \
1863 k()->initialize(CHECK_0); \
1864 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK_0); \
1865 va_end(args); \
1866 ret = jvalue.get_##ResultType(); \
1867 return ret;\
1868 JNI_END
1869
1870 // the runtime type of subword integral basic types is integer
1871 DEFINE_CALLSTATICMETHODV(jboolean, Boolean, T_BOOLEAN
1872 , HOTSPOT_JNI_CALLSTATICBOOLEANMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1873 HOTSPOT_JNI_CALLSTATICBOOLEANMETHODV_RETURN(_ret_ref));
1874 DEFINE_CALLSTATICMETHODV(jbyte, Byte, T_BYTE
1875 , HOTSPOT_JNI_CALLSTATICBYTEMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1876 HOTSPOT_JNI_CALLSTATICBYTEMETHODV_RETURN(_ret_ref));
1877 DEFINE_CALLSTATICMETHODV(jchar, Char, T_CHAR
1878 , HOTSPOT_JNI_CALLSTATICCHARMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1879 HOTSPOT_JNI_CALLSTATICCHARMETHODV_RETURN(_ret_ref));
1880 DEFINE_CALLSTATICMETHODV(jshort, Short, T_SHORT
1881 , HOTSPOT_JNI_CALLSTATICSHORTMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1882 HOTSPOT_JNI_CALLSTATICSHORTMETHODV_RETURN(_ret_ref));
1883
1884 DEFINE_CALLSTATICMETHODV(jobject, Object, T_OBJECT
1885 , HOTSPOT_JNI_CALLSTATICOBJECTMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1886 HOTSPOT_JNI_CALLSTATICOBJECTMETHODV_RETURN(_ret_ref));
1887 DEFINE_CALLSTATICMETHODV(jint, Int, T_INT
1888 , HOTSPOT_JNI_CALLSTATICINTMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1889 HOTSPOT_JNI_CALLSTATICINTMETHODV_RETURN(_ret_ref));
1890 DEFINE_CALLSTATICMETHODV(jlong, Long, T_LONG
1891 , HOTSPOT_JNI_CALLSTATICLONGMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1892 HOTSPOT_JNI_CALLSTATICLONGMETHODV_RETURN(_ret_ref));
1893 // Float and double probes don't return value because dtrace doesn't currently support it
1894 DEFINE_CALLSTATICMETHODV(jfloat, Float, T_FLOAT
1895 , HOTSPOT_JNI_CALLSTATICFLOATMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1896 HOTSPOT_JNI_CALLSTATICFLOATMETHODV_RETURN());
1897 DEFINE_CALLSTATICMETHODV(jdouble, Double, T_DOUBLE
1898 , HOTSPOT_JNI_CALLSTATICDOUBLEMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1899 HOTSPOT_JNI_CALLSTATICDOUBLEMETHODV_RETURN());
1900
1901 #define DEFINE_CALLSTATICMETHODA(ResultType, Result, Tag \
1902 , EntryProbe, ResultProbe) \
1903 \
1904 DT_RETURN_MARK_DECL_FOR(Result, CallStatic##Result##MethodA, ResultType \
1905 , ResultProbe); \
1906 \
1907 JNI_ENTRY(ResultType, \
1908 jni_CallStatic##Result##MethodA(JNIEnv *env, jclass cls, jmethodID methodID, const jvalue *args)) \
1909 JNIWrapper("CallStatic" XSTR(Result) "MethodA"); \
1910 \
1911 EntryProbe; \
1912 ResultType ret = 0;\
1913 DT_RETURN_MARK_FOR(Result, CallStatic##Result##MethodA, ResultType, \
1914 (const ResultType&)ret);\
1915 \
1916 JavaValue jvalue(Tag); \
1917 JNI_ArgumentPusherArray ap(methodID, args); \
1918 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK_0); \
1919 ret = jvalue.get_##ResultType(); \
1920 return ret;\
1921 JNI_END
1922
1923 // the runtime type of subword integral basic types is integer
1924 DEFINE_CALLSTATICMETHODA(jboolean, Boolean, T_BOOLEAN
1925 , HOTSPOT_JNI_CALLSTATICBOOLEANMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1926 HOTSPOT_JNI_CALLSTATICBOOLEANMETHODA_RETURN(_ret_ref));
1927 DEFINE_CALLSTATICMETHODA(jbyte, Byte, T_BYTE
1928 , HOTSPOT_JNI_CALLSTATICBYTEMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1929 HOTSPOT_JNI_CALLSTATICBYTEMETHODA_RETURN(_ret_ref));
1930 DEFINE_CALLSTATICMETHODA(jchar, Char, T_CHAR
1931 , HOTSPOT_JNI_CALLSTATICCHARMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1932 HOTSPOT_JNI_CALLSTATICCHARMETHODA_RETURN(_ret_ref));
1933 DEFINE_CALLSTATICMETHODA(jshort, Short, T_SHORT
1934 , HOTSPOT_JNI_CALLSTATICSHORTMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1935 HOTSPOT_JNI_CALLSTATICSHORTMETHODA_RETURN(_ret_ref));
1936
1937 DEFINE_CALLSTATICMETHODA(jobject, Object, T_OBJECT
1938 , HOTSPOT_JNI_CALLSTATICOBJECTMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1939 HOTSPOT_JNI_CALLSTATICOBJECTMETHODA_RETURN(_ret_ref));
1940 DEFINE_CALLSTATICMETHODA(jint, Int, T_INT
1941 , HOTSPOT_JNI_CALLSTATICINTMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1942 HOTSPOT_JNI_CALLSTATICINTMETHODA_RETURN(_ret_ref));
1943 DEFINE_CALLSTATICMETHODA(jlong, Long, T_LONG
1944 , HOTSPOT_JNI_CALLSTATICLONGMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1945 HOTSPOT_JNI_CALLSTATICLONGMETHODA_RETURN(_ret_ref));
1946 // Float and double probes don't return value because dtrace doesn't currently support it
1947 DEFINE_CALLSTATICMETHODA(jfloat, Float, T_FLOAT
1948 , HOTSPOT_JNI_CALLSTATICFLOATMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1949 HOTSPOT_JNI_CALLSTATICFLOATMETHODA_RETURN());
1950 DEFINE_CALLSTATICMETHODA(jdouble, Double, T_DOUBLE
1951 , HOTSPOT_JNI_CALLSTATICDOUBLEMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1952 HOTSPOT_JNI_CALLSTATICDOUBLEMETHODA_RETURN());
1953
1954 DT_VOID_RETURN_MARK_DECL(CallStaticVoidMethod
1955 , HOTSPOT_JNI_CALLSTATICVOIDMETHOD_RETURN());
1956 DT_VOID_RETURN_MARK_DECL(CallStaticVoidMethodV
1957 , HOTSPOT_JNI_CALLSTATICVOIDMETHODV_RETURN());
1958 DT_VOID_RETURN_MARK_DECL(CallStaticVoidMethodA
1959 , HOTSPOT_JNI_CALLSTATICVOIDMETHODA_RETURN());
1960
1961 JNI_ENTRY(void, jni_CallStaticVoidMethod(JNIEnv *env, jclass cls, jmethodID methodID, ...))
1962 JNIWrapper("CallStaticVoidMethod");
1963 HOTSPOT_JNI_CALLSTATICVOIDMETHOD_ENTRY(env, cls, (uintptr_t) methodID);
1964 DT_VOID_RETURN_MARK(CallStaticVoidMethod);
1965
1966 va_list args;
1967 va_start(args, methodID);
1968 JavaValue jvalue(T_VOID);
1969 JNI_ArgumentPusherVaArg ap(methodID, args);
1970 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK);
1971 va_end(args);
1972 JNI_END
1973
1974
1975 JNI_ENTRY(void, jni_CallStaticVoidMethodV(JNIEnv *env, jclass cls, jmethodID methodID, va_list args))
1976 JNIWrapper("CallStaticVoidMethodV");
1977 HOTSPOT_JNI_CALLSTATICVOIDMETHODV_ENTRY(env, cls, (uintptr_t) methodID);
1978 DT_VOID_RETURN_MARK(CallStaticVoidMethodV);
1979
1980 JavaValue jvalue(T_VOID);
1981 JNI_ArgumentPusherVaArg ap(methodID, args);
1982 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK);
1983 JNI_END
1984
1985
1986 JNI_ENTRY(void, jni_CallStaticVoidMethodA(JNIEnv *env, jclass cls, jmethodID methodID, const jvalue *args))
1987 JNIWrapper("CallStaticVoidMethodA");
1988 HOTSPOT_JNI_CALLSTATICVOIDMETHODA_ENTRY(env, cls, (uintptr_t) methodID);
1989 DT_VOID_RETURN_MARK(CallStaticVoidMethodA);
1990
1991 JavaValue jvalue(T_VOID);
1992 JNI_ArgumentPusherArray ap(methodID, args);
1993 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK);
1994 JNI_END
1995
1996
1997 //
1998 // Accessing Fields
1999 //
2000
2001
2002 DT_RETURN_MARK_DECL(GetFieldID, jfieldID
2003 , HOTSPOT_JNI_GETFIELDID_RETURN((uintptr_t)_ret_ref));
2004
2005 JNI_ENTRY(jfieldID, jni_GetFieldID(JNIEnv *env, jclass clazz,
2006 const char *name, const char *sig))
2007 JNIWrapper("GetFieldID");
2008 HOTSPOT_JNI_GETFIELDID_ENTRY(env, clazz, (char *) name, (char *) sig);
2009 jfieldID ret = 0;
2010 DT_RETURN_MARK(GetFieldID, jfieldID, (const jfieldID&)ret);
2011
2012 // The class should have been loaded (we have an instance of the class
2013 // passed in) so the field and signature should already be in the symbol
2014 // table. If they're not there, the field doesn't exist.
2015 TempNewSymbol fieldname = SymbolTable::probe(name, (int)strlen(name));
2016 TempNewSymbol signame = SymbolTable::probe(sig, (int)strlen(sig));
2017 if (fieldname == NULL || signame == NULL) {
2018 THROW_MSG_0(vmSymbols::java_lang_NoSuchFieldError(), (char*) name);
2019 }
2020 KlassHandle k(THREAD,
2021 java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz)));
2022 // Make sure class is initialized before handing id's out to fields
2023 k()->initialize(CHECK_NULL);
2024
2025 fieldDescriptor fd;
2026 if (!k()->is_instance_klass() ||
2027 !InstanceKlass::cast(k())->find_field(fieldname, signame, false, &fd)) {
2028 THROW_MSG_0(vmSymbols::java_lang_NoSuchFieldError(), (char*) name);
2029 }
2030
2031 // A jfieldID for a non-static field is simply the offset of the field within the instanceOop
2032 // It may also have hash bits for k, if VerifyJNIFields is turned on.
2033 ret = jfieldIDWorkaround::to_instance_jfieldID(k(), fd.offset());
2034 return ret;
2035 JNI_END
2036
2037
2038 JNI_ENTRY(jobject, jni_GetObjectField(JNIEnv *env, jobject obj, jfieldID fieldID))
2039 JNIWrapper("GetObjectField");
2040 HOTSPOT_JNI_GETOBJECTFIELD_ENTRY(env, obj, (uintptr_t) fieldID);
2041 oop o = JNIHandles::resolve_non_null(obj);
2042 Klass* k = o->klass();
2043 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID);
2044 // Keep JVMTI addition small and only check enabled flag here.
2045 // jni_GetField_probe() assumes that is okay to create handles.
2046 if (JvmtiExport::should_post_field_access()) {
2047 o = JvmtiExport::jni_GetField_probe(thread, obj, o, k, fieldID, false);
2048 }
2049 jobject ret = JNIHandles::make_local(env, o->obj_field(offset));
2050 #if INCLUDE_ALL_GCS
2051 // If G1 is enabled and we are accessing the value of the referent
2052 // field in a reference object then we need to register a non-null
2053 // referent with the SATB barrier.
2054 if (UseG1GC) {
2055 bool needs_barrier = false;
2056
2057 if (ret != NULL &&
2058 offset == java_lang_ref_Reference::referent_offset &&
2059 InstanceKlass::cast(k)->reference_type() != REF_NONE) {
2060 assert(InstanceKlass::cast(k)->is_subclass_of(SystemDictionary::Reference_klass()), "sanity");
2061 needs_barrier = true;
2062 }
2063
2064 if (needs_barrier) {
2065 oop referent = JNIHandles::resolve(ret);
2066 SATBMarkQueue::enqueue(referent);
2067 }
2068 }
2069 #endif // INCLUDE_ALL_GCS
2070 HOTSPOT_JNI_GETOBJECTFIELD_RETURN(ret);
2071 return ret;
2072 JNI_END
2073
2074
2075
2076 #define DEFINE_GETFIELD(Return,Fieldname,Result \
2077 , EntryProbe, ReturnProbe) \
2078 \
2079 DT_RETURN_MARK_DECL_FOR(Result, Get##Result##Field, Return \
2080 , ReturnProbe); \
2081 \
2082 JNI_QUICK_ENTRY(Return, jni_Get##Result##Field(JNIEnv *env, jobject obj, jfieldID fieldID)) \
2083 JNIWrapper("Get" XSTR(Result) "Field"); \
2084 \
2085 EntryProbe; \
2086 Return ret = 0;\
2087 DT_RETURN_MARK_FOR(Result, Get##Result##Field, Return, (const Return&)ret);\
2088 \
2089 oop o = JNIHandles::resolve_non_null(obj); \
2090 Klass* k = o->klass(); \
2091 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID); \
2092 /* Keep JVMTI addition small and only check enabled flag here. */ \
2093 /* jni_GetField_probe_nh() assumes that is not okay to create handles */ \
2094 /* and creates a ResetNoHandleMark. */ \
2095 if (JvmtiExport::should_post_field_access()) { \
2096 o = JvmtiExport::jni_GetField_probe_nh(thread, obj, o, k, fieldID, false); \
2097 } \
2098 ret = o->Fieldname##_field(offset); \
2099 return ret; \
2100 JNI_END
2101
2102 DEFINE_GETFIELD(jboolean, bool, Boolean
2103 , HOTSPOT_JNI_GETBOOLEANFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2104 HOTSPOT_JNI_GETBOOLEANFIELD_RETURN(_ret_ref))
2105 DEFINE_GETFIELD(jbyte, byte, Byte
2106 , HOTSPOT_JNI_GETBYTEFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2107 HOTSPOT_JNI_GETBYTEFIELD_RETURN(_ret_ref))
2108 DEFINE_GETFIELD(jchar, char, Char
2109 , HOTSPOT_JNI_GETCHARFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2110 HOTSPOT_JNI_GETCHARFIELD_RETURN(_ret_ref))
2111 DEFINE_GETFIELD(jshort, short, Short
2112 , HOTSPOT_JNI_GETSHORTFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2113 HOTSPOT_JNI_GETSHORTFIELD_RETURN(_ret_ref))
2114 DEFINE_GETFIELD(jint, int, Int
2115 , HOTSPOT_JNI_GETINTFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2116 HOTSPOT_JNI_GETINTFIELD_RETURN(_ret_ref))
2117 DEFINE_GETFIELD(jlong, long, Long
2118 , HOTSPOT_JNI_GETLONGFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2119 HOTSPOT_JNI_GETLONGFIELD_RETURN(_ret_ref))
2120 // Float and double probes don't return value because dtrace doesn't currently support it
2121 DEFINE_GETFIELD(jfloat, float, Float
2122 , HOTSPOT_JNI_GETFLOATFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2123 HOTSPOT_JNI_GETFLOATFIELD_RETURN())
2124 DEFINE_GETFIELD(jdouble, double, Double
2125 , HOTSPOT_JNI_GETDOUBLEFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2126 HOTSPOT_JNI_GETDOUBLEFIELD_RETURN())
2127
2128 address jni_GetBooleanField_addr() {
2129 return (address)jni_GetBooleanField;
2130 }
2131 address jni_GetByteField_addr() {
2132 return (address)jni_GetByteField;
2133 }
2134 address jni_GetCharField_addr() {
2135 return (address)jni_GetCharField;
2136 }
2137 address jni_GetShortField_addr() {
2138 return (address)jni_GetShortField;
2139 }
2140 address jni_GetIntField_addr() {
2141 return (address)jni_GetIntField;
2142 }
2143 address jni_GetLongField_addr() {
2144 return (address)jni_GetLongField;
2145 }
2146 address jni_GetFloatField_addr() {
2147 return (address)jni_GetFloatField;
2148 }
2149 address jni_GetDoubleField_addr() {
2150 return (address)jni_GetDoubleField;
2151 }
2152
2153 JNI_QUICK_ENTRY(void, jni_SetObjectField(JNIEnv *env, jobject obj, jfieldID fieldID, jobject value))
2154 JNIWrapper("SetObjectField");
2155 HOTSPOT_JNI_SETOBJECTFIELD_ENTRY(env, obj, (uintptr_t) fieldID, value);
2156 oop o = JNIHandles::resolve_non_null(obj);
2157 Klass* k = o->klass();
2158 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID);
2159 // Keep JVMTI addition small and only check enabled flag here.
2160 // jni_SetField_probe_nh() assumes that is not okay to create handles
2161 // and creates a ResetNoHandleMark.
2162 if (JvmtiExport::should_post_field_modification()) {
2163 jvalue field_value;
2164 field_value.l = value;
2165 o = JvmtiExport::jni_SetField_probe_nh(thread, obj, o, k, fieldID, false, 'L', (jvalue *)&field_value);
2166 }
2167 o->obj_field_put(offset, JNIHandles::resolve(value));
2168 HOTSPOT_JNI_SETOBJECTFIELD_RETURN();
2169 JNI_END
2170
2171
2172 #define DEFINE_SETFIELD(Argument,Fieldname,Result,SigType,unionType \
2173 , EntryProbe, ReturnProbe) \
2174 \
2175 JNI_QUICK_ENTRY(void, jni_Set##Result##Field(JNIEnv *env, jobject obj, jfieldID fieldID, Argument value)) \
2176 JNIWrapper("Set" XSTR(Result) "Field"); \
2177 \
2178 EntryProbe; \
2179 \
2180 oop o = JNIHandles::resolve_non_null(obj); \
2181 Klass* k = o->klass(); \
2182 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID); \
2183 /* Keep JVMTI addition small and only check enabled flag here. */ \
2184 /* jni_SetField_probe_nh() assumes that is not okay to create handles */ \
2185 /* and creates a ResetNoHandleMark. */ \
2186 if (JvmtiExport::should_post_field_modification()) { \
2187 jvalue field_value; \
2188 field_value.unionType = value; \
2189 o = JvmtiExport::jni_SetField_probe_nh(thread, obj, o, k, fieldID, false, SigType, (jvalue *)&field_value); \
2190 } \
2191 o->Fieldname##_field_put(offset, value); \
2192 ReturnProbe; \
2193 JNI_END
2194
2195 DEFINE_SETFIELD(jboolean, bool, Boolean, 'Z', z
2196 , HOTSPOT_JNI_SETBOOLEANFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value),
2197 HOTSPOT_JNI_SETBOOLEANFIELD_RETURN())
2198 DEFINE_SETFIELD(jbyte, byte, Byte, 'B', b
2199 , HOTSPOT_JNI_SETBYTEFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value),
2200 HOTSPOT_JNI_SETBYTEFIELD_RETURN())
2201 DEFINE_SETFIELD(jchar, char, Char, 'C', c
2202 , HOTSPOT_JNI_SETCHARFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value),
2203 HOTSPOT_JNI_SETCHARFIELD_RETURN())
2204 DEFINE_SETFIELD(jshort, short, Short, 'S', s
2205 , HOTSPOT_JNI_SETSHORTFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value),
2206 HOTSPOT_JNI_SETSHORTFIELD_RETURN())
2207 DEFINE_SETFIELD(jint, int, Int, 'I', i
2208 , HOTSPOT_JNI_SETINTFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value),
2209 HOTSPOT_JNI_SETINTFIELD_RETURN())
2210 DEFINE_SETFIELD(jlong, long, Long, 'J', j
2211 , HOTSPOT_JNI_SETLONGFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value),
2212 HOTSPOT_JNI_SETLONGFIELD_RETURN())
2213 // Float and double probes don't return value because dtrace doesn't currently support it
2214 DEFINE_SETFIELD(jfloat, float, Float, 'F', f
2215 , HOTSPOT_JNI_SETFLOATFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2216 HOTSPOT_JNI_SETFLOATFIELD_RETURN())
2217 DEFINE_SETFIELD(jdouble, double, Double, 'D', d
2218 , HOTSPOT_JNI_SETDOUBLEFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2219 HOTSPOT_JNI_SETDOUBLEFIELD_RETURN())
2220
2221 DT_RETURN_MARK_DECL(ToReflectedField, jobject
2222 , HOTSPOT_JNI_TOREFLECTEDFIELD_RETURN(_ret_ref));
2223
2224 JNI_ENTRY(jobject, jni_ToReflectedField(JNIEnv *env, jclass cls, jfieldID fieldID, jboolean isStatic))
2225 JNIWrapper("ToReflectedField");
2226 HOTSPOT_JNI_TOREFLECTEDFIELD_ENTRY(env, cls, (uintptr_t) fieldID, isStatic);
2227 jobject ret = NULL;
2228 DT_RETURN_MARK(ToReflectedField, jobject, (const jobject&)ret);
2229
2230 fieldDescriptor fd;
2231 bool found = false;
2232 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2233
2234 assert(jfieldIDWorkaround::is_static_jfieldID(fieldID) == (isStatic != 0), "invalid fieldID");
2235
2236 if (isStatic) {
2237 // Static field. The fieldID a JNIid specifying the field holder and the offset within the Klass*.
2238 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID);
2239 assert(id->is_static_field_id(), "invalid static field id");
2240 found = id->find_local_field(&fd);
2241 } else {
2242 // Non-static field. The fieldID is really the offset of the field within the instanceOop.
2243 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID);
2244 found = InstanceKlass::cast(k)->find_field_from_offset(offset, false, &fd);
2245 }
2246 assert(found, "bad fieldID passed into jni_ToReflectedField");
2247 oop reflected = Reflection::new_field(&fd, CHECK_NULL);
2248 ret = JNIHandles::make_local(env, reflected);
2249 return ret;
2250 JNI_END
2251
2252
2253 //
2254 // Accessing Static Fields
2255 //
2256 DT_RETURN_MARK_DECL(GetStaticFieldID, jfieldID
2257 , HOTSPOT_JNI_GETSTATICFIELDID_RETURN((uintptr_t)_ret_ref));
2258
2259 JNI_ENTRY(jfieldID, jni_GetStaticFieldID(JNIEnv *env, jclass clazz,
2260 const char *name, const char *sig))
2261 JNIWrapper("GetStaticFieldID");
2262 HOTSPOT_JNI_GETSTATICFIELDID_ENTRY(env, clazz, (char *) name, (char *) sig);
2263 jfieldID ret = NULL;
2264 DT_RETURN_MARK(GetStaticFieldID, jfieldID, (const jfieldID&)ret);
2265
2266 // The class should have been loaded (we have an instance of the class
2267 // passed in) so the field and signature should already be in the symbol
2268 // table. If they're not there, the field doesn't exist.
2269 TempNewSymbol fieldname = SymbolTable::probe(name, (int)strlen(name));
2270 TempNewSymbol signame = SymbolTable::probe(sig, (int)strlen(sig));
2271 if (fieldname == NULL || signame == NULL) {
2272 THROW_MSG_0(vmSymbols::java_lang_NoSuchFieldError(), (char*) name);
2273 }
2274 KlassHandle k(THREAD,
2275 java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz)));
2276 // Make sure class is initialized before handing id's out to static fields
2277 k()->initialize(CHECK_NULL);
2278
2279 fieldDescriptor fd;
2280 if (!k()->is_instance_klass() ||
2281 !InstanceKlass::cast(k())->find_field(fieldname, signame, true, &fd)) {
2282 THROW_MSG_0(vmSymbols::java_lang_NoSuchFieldError(), (char*) name);
2283 }
2284
2285 // A jfieldID for a static field is a JNIid specifying the field holder and the offset within the Klass*
2286 JNIid* id = fd.field_holder()->jni_id_for(fd.offset());
2287 debug_only(id->set_is_static_field_id();)
2288
2289 debug_only(id->verify(fd.field_holder()));
2290
2291 ret = jfieldIDWorkaround::to_static_jfieldID(id);
2292 return ret;
2293 JNI_END
2294
2295
2296 JNI_ENTRY(jobject, jni_GetStaticObjectField(JNIEnv *env, jclass clazz, jfieldID fieldID))
2297 JNIWrapper("GetStaticObjectField");
2298 HOTSPOT_JNI_GETSTATICOBJECTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID);
2299 #if INCLUDE_JNI_CHECK
2300 DEBUG_ONLY(Klass* param_k = jniCheck::validate_class(thread, clazz);)
2301 #endif // INCLUDE_JNI_CHECK
2302 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID);
2303 assert(id->is_static_field_id(), "invalid static field id");
2304 // Keep JVMTI addition small and only check enabled flag here.
2305 // jni_GetField_probe() assumes that is okay to create handles.
2306 if (JvmtiExport::should_post_field_access()) {
2307 JvmtiExport::jni_GetField_probe(thread, NULL, NULL, id->holder(), fieldID, true);
2308 }
2309 jobject ret = JNIHandles::make_local(id->holder()->java_mirror()->obj_field(id->offset()));
2310 HOTSPOT_JNI_GETSTATICOBJECTFIELD_RETURN(ret);
2311 return ret;
2312 JNI_END
2313
2314
2315 #define DEFINE_GETSTATICFIELD(Return,Fieldname,Result \
2316 , EntryProbe, ReturnProbe) \
2317 \
2318 DT_RETURN_MARK_DECL_FOR(Result, GetStatic##Result##Field, Return \
2319 , ReturnProbe); \
2320 \
2321 JNI_ENTRY(Return, jni_GetStatic##Result##Field(JNIEnv *env, jclass clazz, jfieldID fieldID)) \
2322 JNIWrapper("GetStatic" XSTR(Result) "Field"); \
2323 EntryProbe; \
2324 Return ret = 0;\
2325 DT_RETURN_MARK_FOR(Result, GetStatic##Result##Field, Return, \
2326 (const Return&)ret);\
2327 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID); \
2328 assert(id->is_static_field_id(), "invalid static field id"); \
2329 /* Keep JVMTI addition small and only check enabled flag here. */ \
2330 /* jni_GetField_probe() assumes that is okay to create handles. */ \
2331 if (JvmtiExport::should_post_field_access()) { \
2332 JvmtiExport::jni_GetField_probe(thread, NULL, NULL, id->holder(), fieldID, true); \
2333 } \
2334 ret = id->holder()->java_mirror()-> Fieldname##_field (id->offset()); \
2335 return ret;\
2336 JNI_END
2337
2338 DEFINE_GETSTATICFIELD(jboolean, bool, Boolean
2339 , HOTSPOT_JNI_GETSTATICBOOLEANFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICBOOLEANFIELD_RETURN(_ret_ref))
2340 DEFINE_GETSTATICFIELD(jbyte, byte, Byte
2341 , HOTSPOT_JNI_GETSTATICBYTEFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICBYTEFIELD_RETURN(_ret_ref) )
2342 DEFINE_GETSTATICFIELD(jchar, char, Char
2343 , HOTSPOT_JNI_GETSTATICCHARFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICCHARFIELD_RETURN(_ret_ref) )
2344 DEFINE_GETSTATICFIELD(jshort, short, Short
2345 , HOTSPOT_JNI_GETSTATICSHORTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICSHORTFIELD_RETURN(_ret_ref) )
2346 DEFINE_GETSTATICFIELD(jint, int, Int
2347 , HOTSPOT_JNI_GETSTATICINTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICINTFIELD_RETURN(_ret_ref) )
2348 DEFINE_GETSTATICFIELD(jlong, long, Long
2349 , HOTSPOT_JNI_GETSTATICLONGFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICLONGFIELD_RETURN(_ret_ref) )
2350 // Float and double probes don't return value because dtrace doesn't currently support it
2351 DEFINE_GETSTATICFIELD(jfloat, float, Float
2352 , HOTSPOT_JNI_GETSTATICFLOATFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICFLOATFIELD_RETURN() )
2353 DEFINE_GETSTATICFIELD(jdouble, double, Double
2354 , HOTSPOT_JNI_GETSTATICDOUBLEFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICDOUBLEFIELD_RETURN() )
2355
2356 JNI_ENTRY(void, jni_SetStaticObjectField(JNIEnv *env, jclass clazz, jfieldID fieldID, jobject value))
2357 JNIWrapper("SetStaticObjectField");
2358 HOTSPOT_JNI_SETSTATICOBJECTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value);
2359 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID);
2360 assert(id->is_static_field_id(), "invalid static field id");
2361 // Keep JVMTI addition small and only check enabled flag here.
2362 // jni_SetField_probe() assumes that is okay to create handles.
2363 if (JvmtiExport::should_post_field_modification()) {
2364 jvalue field_value;
2365 field_value.l = value;
2366 JvmtiExport::jni_SetField_probe(thread, NULL, NULL, id->holder(), fieldID, true, 'L', (jvalue *)&field_value);
2367 }
2368 id->holder()->java_mirror()->obj_field_put(id->offset(), JNIHandles::resolve(value));
2369 HOTSPOT_JNI_SETSTATICOBJECTFIELD_RETURN();
2370 JNI_END
2371
2372
2373
2374 #define DEFINE_SETSTATICFIELD(Argument,Fieldname,Result,SigType,unionType \
2375 , EntryProbe, ReturnProbe) \
2376 \
2377 JNI_ENTRY(void, jni_SetStatic##Result##Field(JNIEnv *env, jclass clazz, jfieldID fieldID, Argument value)) \
2378 JNIWrapper("SetStatic" XSTR(Result) "Field"); \
2379 EntryProbe; \
2380 \
2381 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID); \
2382 assert(id->is_static_field_id(), "invalid static field id"); \
2383 /* Keep JVMTI addition small and only check enabled flag here. */ \
2384 /* jni_SetField_probe() assumes that is okay to create handles. */ \
2385 if (JvmtiExport::should_post_field_modification()) { \
2386 jvalue field_value; \
2387 field_value.unionType = value; \
2388 JvmtiExport::jni_SetField_probe(thread, NULL, NULL, id->holder(), fieldID, true, SigType, (jvalue *)&field_value); \
2389 } \
2390 id->holder()->java_mirror()-> Fieldname##_field_put (id->offset(), value); \
2391 ReturnProbe;\
2392 JNI_END
2393
2394 DEFINE_SETSTATICFIELD(jboolean, bool, Boolean, 'Z', z
2395 , HOTSPOT_JNI_SETSTATICBOOLEANFIELD_ENTRY(env, clazz, (uintptr_t)fieldID, value),
2396 HOTSPOT_JNI_SETSTATICBOOLEANFIELD_RETURN())
2397 DEFINE_SETSTATICFIELD(jbyte, byte, Byte, 'B', b
2398 , HOTSPOT_JNI_SETSTATICBYTEFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value),
2399 HOTSPOT_JNI_SETSTATICBYTEFIELD_RETURN())
2400 DEFINE_SETSTATICFIELD(jchar, char, Char, 'C', c
2401 , HOTSPOT_JNI_SETSTATICCHARFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value),
2402 HOTSPOT_JNI_SETSTATICCHARFIELD_RETURN())
2403 DEFINE_SETSTATICFIELD(jshort, short, Short, 'S', s
2404 , HOTSPOT_JNI_SETSTATICSHORTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value),
2405 HOTSPOT_JNI_SETSTATICSHORTFIELD_RETURN())
2406 DEFINE_SETSTATICFIELD(jint, int, Int, 'I', i
2407 , HOTSPOT_JNI_SETSTATICINTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value),
2408 HOTSPOT_JNI_SETSTATICINTFIELD_RETURN())
2409 DEFINE_SETSTATICFIELD(jlong, long, Long, 'J', j
2410 , HOTSPOT_JNI_SETSTATICLONGFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value),
2411 HOTSPOT_JNI_SETSTATICLONGFIELD_RETURN())
2412 // Float and double probes don't return value because dtrace doesn't currently support it
2413 DEFINE_SETSTATICFIELD(jfloat, float, Float, 'F', f
2414 , HOTSPOT_JNI_SETSTATICFLOATFIELD_ENTRY(env, clazz, (uintptr_t) fieldID),
2415 HOTSPOT_JNI_SETSTATICFLOATFIELD_RETURN())
2416 DEFINE_SETSTATICFIELD(jdouble, double, Double, 'D', d
2417 , HOTSPOT_JNI_SETSTATICDOUBLEFIELD_ENTRY(env, clazz, (uintptr_t) fieldID),
2418 HOTSPOT_JNI_SETSTATICDOUBLEFIELD_RETURN())
2419
2420 //
2421 // String Operations
2422 //
2423
2424 // Unicode Interface
2425
2426 DT_RETURN_MARK_DECL(NewString, jstring
2427 , HOTSPOT_JNI_NEWSTRING_RETURN(_ret_ref));
2428
2429 JNI_ENTRY(jstring, jni_NewString(JNIEnv *env, const jchar *unicodeChars, jsize len))
2430 JNIWrapper("NewString");
2431 HOTSPOT_JNI_NEWSTRING_ENTRY(env, (uint16_t *) unicodeChars, len);
2432 jstring ret = NULL;
2433 DT_RETURN_MARK(NewString, jstring, (const jstring&)ret);
2434 oop string=java_lang_String::create_oop_from_unicode((jchar*) unicodeChars, len, CHECK_NULL);
2435 ret = (jstring) JNIHandles::make_local(env, string);
2436 return ret;
2437 JNI_END
2438
2439
2440 JNI_QUICK_ENTRY(jsize, jni_GetStringLength(JNIEnv *env, jstring string))
2441 JNIWrapper("GetStringLength");
2442 HOTSPOT_JNI_GETSTRINGLENGTH_ENTRY(env, string);
2443 jsize ret = 0;
2444 oop s = JNIHandles::resolve_non_null(string);
2445 if (java_lang_String::value(s) != NULL) {
2446 ret = java_lang_String::length(s);
2447 }
2448 HOTSPOT_JNI_GETSTRINGLENGTH_RETURN(ret);
2449 return ret;
2450 JNI_END
2451
2452
2453 JNI_QUICK_ENTRY(const jchar*, jni_GetStringChars(
2454 JNIEnv *env, jstring string, jboolean *isCopy))
2455 JNIWrapper("GetStringChars");
2456 HOTSPOT_JNI_GETSTRINGCHARS_ENTRY(env, string, (uintptr_t *) isCopy);
2457 jchar* buf = NULL;
2458 oop s = JNIHandles::resolve_non_null(string);
2459 typeArrayOop s_value = java_lang_String::value(s);
2460 if (s_value != NULL) {
2461 int s_len = java_lang_String::length(s);
2462 bool is_latin1 = java_lang_String::is_latin1(s);
2463 buf = NEW_C_HEAP_ARRAY_RETURN_NULL(jchar, s_len + 1, mtInternal); // add one for zero termination
2464 /* JNI Specification states return NULL on OOM */
2465 if (buf != NULL) {
2466 if (s_len > 0) {
2467 if (!is_latin1) {
2468 memcpy(buf, s_value->char_at_addr(0), sizeof(jchar)*s_len);
2469 } else {
2470 for (int i = 0; i < s_len; i++) {
2471 buf[i] = ((jchar) s_value->byte_at(i)) & 0xff;
2472 }
2473 }
2474 }
2475 buf[s_len] = 0;
2476 //%note jni_5
2477 if (isCopy != NULL) {
2478 *isCopy = JNI_TRUE;
2479 }
2480 }
2481 }
2482 HOTSPOT_JNI_GETSTRINGCHARS_RETURN(buf);
2483 return buf;
2484 JNI_END
2485
2486
2487 JNI_QUICK_ENTRY(void, jni_ReleaseStringChars(JNIEnv *env, jstring str, const jchar *chars))
2488 JNIWrapper("ReleaseStringChars");
2489 HOTSPOT_JNI_RELEASESTRINGCHARS_ENTRY(env, str, (uint16_t *) chars);
2490 //%note jni_6
2491 if (chars != NULL) {
2492 // Since String objects are supposed to be immutable, don't copy any
2493 // new data back. A bad user will have to go after the char array.
2494 FreeHeap((void*) chars);
2495 }
2496 HOTSPOT_JNI_RELEASESTRINGCHARS_RETURN();
2497 JNI_END
2498
2499
2500 // UTF Interface
2501
2502 DT_RETURN_MARK_DECL(NewStringUTF, jstring
2503 , HOTSPOT_JNI_NEWSTRINGUTF_RETURN(_ret_ref));
2504
2505 JNI_ENTRY(jstring, jni_NewStringUTF(JNIEnv *env, const char *bytes))
2506 JNIWrapper("NewStringUTF");
2507 HOTSPOT_JNI_NEWSTRINGUTF_ENTRY(env, (char *) bytes);
2508 jstring ret;
2509 DT_RETURN_MARK(NewStringUTF, jstring, (const jstring&)ret);
2510
2511 oop result = java_lang_String::create_oop_from_str((char*) bytes, CHECK_NULL);
2512 ret = (jstring) JNIHandles::make_local(env, result);
2513 return ret;
2514 JNI_END
2515
2516
2517 JNI_ENTRY(jsize, jni_GetStringUTFLength(JNIEnv *env, jstring string))
2518 JNIWrapper("GetStringUTFLength");
2519 HOTSPOT_JNI_GETSTRINGUTFLENGTH_ENTRY(env, string);
2520 jsize ret = 0;
2521 oop java_string = JNIHandles::resolve_non_null(string);
2522 if (java_lang_String::value(java_string) != NULL) {
2523 ret = java_lang_String::utf8_length(java_string);
2524 }
2525 HOTSPOT_JNI_GETSTRINGUTFLENGTH_RETURN(ret);
2526 return ret;
2527 JNI_END
2528
2529
2530 JNI_ENTRY(const char*, jni_GetStringUTFChars(JNIEnv *env, jstring string, jboolean *isCopy))
2531 JNIWrapper("GetStringUTFChars");
2532 HOTSPOT_JNI_GETSTRINGUTFCHARS_ENTRY(env, string, (uintptr_t *) isCopy);
2533 char* result = NULL;
2534 oop java_string = JNIHandles::resolve_non_null(string);
2535 if (java_lang_String::value(java_string) != NULL) {
2536 size_t length = java_lang_String::utf8_length(java_string);
2537 /* JNI Specification states return NULL on OOM */
2538 result = AllocateHeap(length + 1, mtInternal, 0, AllocFailStrategy::RETURN_NULL);
2539 if (result != NULL) {
2540 java_lang_String::as_utf8_string(java_string, result, (int) length + 1);
2541 if (isCopy != NULL) {
2542 *isCopy = JNI_TRUE;
2543 }
2544 }
2545 }
2546 HOTSPOT_JNI_GETSTRINGUTFCHARS_RETURN(result);
2547 return result;
2548 JNI_END
2549
2550
2551 JNI_LEAF(void, jni_ReleaseStringUTFChars(JNIEnv *env, jstring str, const char *chars))
2552 JNIWrapper("ReleaseStringUTFChars");
2553 HOTSPOT_JNI_RELEASESTRINGUTFCHARS_ENTRY(env, str, (char *) chars);
2554 if (chars != NULL) {
2555 FreeHeap((char*) chars);
2556 }
2557 HOTSPOT_JNI_RELEASESTRINGUTFCHARS_RETURN();
2558 JNI_END
2559
2560
2561 JNI_QUICK_ENTRY(jsize, jni_GetArrayLength(JNIEnv *env, jarray array))
2562 JNIWrapper("GetArrayLength");
2563 HOTSPOT_JNI_GETARRAYLENGTH_ENTRY(env, array);
2564 arrayOop a = arrayOop(JNIHandles::resolve_non_null(array));
2565 assert(a->is_array(), "must be array");
2566 jsize ret = a->length();
2567 HOTSPOT_JNI_GETARRAYLENGTH_RETURN(ret);
2568 return ret;
2569 JNI_END
2570
2571
2572 //
2573 // Object Array Operations
2574 //
2575
2576 DT_RETURN_MARK_DECL(NewObjectArray, jobjectArray
2577 , HOTSPOT_JNI_NEWOBJECTARRAY_RETURN(_ret_ref));
2578
2579 JNI_ENTRY(jobjectArray, jni_NewObjectArray(JNIEnv *env, jsize length, jclass elementClass, jobject initialElement))
2580 JNIWrapper("NewObjectArray");
2581 HOTSPOT_JNI_NEWOBJECTARRAY_ENTRY(env, length, elementClass, initialElement);
2582 jobjectArray ret = NULL;
2583 DT_RETURN_MARK(NewObjectArray, jobjectArray, (const jobjectArray&)ret);
2584 KlassHandle ek(THREAD, java_lang_Class::as_Klass(JNIHandles::resolve_non_null(elementClass)));
2585 Klass* ako = ek()->array_klass(CHECK_NULL);
2586 KlassHandle ak = KlassHandle(THREAD, ako);
2587 ObjArrayKlass::cast(ak())->initialize(CHECK_NULL);
2588 objArrayOop result = ObjArrayKlass::cast(ak())->allocate(length, CHECK_NULL);
2589 oop initial_value = JNIHandles::resolve(initialElement);
2590 if (initial_value != NULL) { // array already initialized with NULL
2591 for (int index = 0; index < length; index++) {
2592 result->obj_at_put(index, initial_value);
2593 }
2594 }
2595 ret = (jobjectArray) JNIHandles::make_local(env, result);
2596 return ret;
2597 JNI_END
2598
2599 DT_RETURN_MARK_DECL(GetObjectArrayElement, jobject
2600 , HOTSPOT_JNI_GETOBJECTARRAYELEMENT_RETURN(_ret_ref));
2601
2602 JNI_ENTRY(jobject, jni_GetObjectArrayElement(JNIEnv *env, jobjectArray array, jsize index))
2603 JNIWrapper("GetObjectArrayElement");
2604 HOTSPOT_JNI_GETOBJECTARRAYELEMENT_ENTRY(env, array, index);
2605 jobject ret = NULL;
2606 DT_RETURN_MARK(GetObjectArrayElement, jobject, (const jobject&)ret);
2607 objArrayOop a = objArrayOop(JNIHandles::resolve_non_null(array));
2608 if (a->is_within_bounds(index)) {
2609 ret = JNIHandles::make_local(env, a->obj_at(index));
2610 return ret;
2611 } else {
2612 char buf[jintAsStringSize];
2613 sprintf(buf, "%d", index);
2614 THROW_MSG_0(vmSymbols::java_lang_ArrayIndexOutOfBoundsException(), buf);
2615 }
2616 JNI_END
2617
2618 DT_VOID_RETURN_MARK_DECL(SetObjectArrayElement
2619 , HOTSPOT_JNI_SETOBJECTARRAYELEMENT_RETURN());
2620
2621 JNI_ENTRY(void, jni_SetObjectArrayElement(JNIEnv *env, jobjectArray array, jsize index, jobject value))
2622 JNIWrapper("SetObjectArrayElement");
2623 HOTSPOT_JNI_SETOBJECTARRAYELEMENT_ENTRY(env, array, index, value);
2624 DT_VOID_RETURN_MARK(SetObjectArrayElement);
2625
2626 objArrayOop a = objArrayOop(JNIHandles::resolve_non_null(array));
2627 oop v = JNIHandles::resolve(value);
2628 if (a->is_within_bounds(index)) {
2629 if (v == NULL || v->is_a(ObjArrayKlass::cast(a->klass())->element_klass())) {
2630 a->obj_at_put(index, v);
2631 } else {
2632 THROW(vmSymbols::java_lang_ArrayStoreException());
2633 }
2634 } else {
2635 char buf[jintAsStringSize];
2636 sprintf(buf, "%d", index);
2637 THROW_MSG(vmSymbols::java_lang_ArrayIndexOutOfBoundsException(), buf);
2638 }
2639 JNI_END
2640
2641
2642
2643 #define DEFINE_NEWSCALARARRAY(Return,Allocator,Result \
2644 ,EntryProbe,ReturnProbe) \
2645 \
2646 DT_RETURN_MARK_DECL(New##Result##Array, Return \
2647 , ReturnProbe); \
2648 \
2649 JNI_ENTRY(Return, \
2650 jni_New##Result##Array(JNIEnv *env, jsize len)) \
2651 JNIWrapper("New" XSTR(Result) "Array"); \
2652 EntryProbe; \
2653 Return ret = NULL;\
2654 DT_RETURN_MARK(New##Result##Array, Return, (const Return&)ret);\
2655 \
2656 oop obj= oopFactory::Allocator(len, CHECK_0); \
2657 ret = (Return) JNIHandles::make_local(env, obj); \
2658 return ret;\
2659 JNI_END
2660
2661 DEFINE_NEWSCALARARRAY(jbooleanArray, new_boolArray, Boolean,
2662 HOTSPOT_JNI_NEWBOOLEANARRAY_ENTRY(env, len),
2663 HOTSPOT_JNI_NEWBOOLEANARRAY_RETURN(_ret_ref))
2664 DEFINE_NEWSCALARARRAY(jbyteArray, new_byteArray, Byte,
2665 HOTSPOT_JNI_NEWBYTEARRAY_ENTRY(env, len),
2666 HOTSPOT_JNI_NEWBYTEARRAY_RETURN(_ret_ref))
2667 DEFINE_NEWSCALARARRAY(jshortArray, new_shortArray, Short,
2668 HOTSPOT_JNI_NEWSHORTARRAY_ENTRY(env, len),
2669 HOTSPOT_JNI_NEWSHORTARRAY_RETURN(_ret_ref))
2670 DEFINE_NEWSCALARARRAY(jcharArray, new_charArray, Char,
2671 HOTSPOT_JNI_NEWCHARARRAY_ENTRY(env, len),
2672 HOTSPOT_JNI_NEWCHARARRAY_RETURN(_ret_ref))
2673 DEFINE_NEWSCALARARRAY(jintArray, new_intArray, Int,
2674 HOTSPOT_JNI_NEWINTARRAY_ENTRY(env, len),
2675 HOTSPOT_JNI_NEWINTARRAY_RETURN(_ret_ref))
2676 DEFINE_NEWSCALARARRAY(jlongArray, new_longArray, Long,
2677 HOTSPOT_JNI_NEWLONGARRAY_ENTRY(env, len),
2678 HOTSPOT_JNI_NEWLONGARRAY_RETURN(_ret_ref))
2679 DEFINE_NEWSCALARARRAY(jfloatArray, new_singleArray, Float,
2680 HOTSPOT_JNI_NEWFLOATARRAY_ENTRY(env, len),
2681 HOTSPOT_JNI_NEWFLOATARRAY_RETURN(_ret_ref))
2682 DEFINE_NEWSCALARARRAY(jdoubleArray, new_doubleArray, Double,
2683 HOTSPOT_JNI_NEWDOUBLEARRAY_ENTRY(env, len),
2684 HOTSPOT_JNI_NEWDOUBLEARRAY_RETURN(_ret_ref))
2685
2686 // Return an address which will fault if the caller writes to it.
2687
2688 static char* get_bad_address() {
2689 static char* bad_address = NULL;
2690 if (bad_address == NULL) {
2691 size_t size = os::vm_allocation_granularity();
2692 bad_address = os::reserve_memory(size);
2693 if (bad_address != NULL) {
2694 os::protect_memory(bad_address, size, os::MEM_PROT_READ,
2695 /*is_committed*/false);
2696 MemTracker::record_virtual_memory_type((void*)bad_address, mtInternal);
2697 }
2698 }
2699 return bad_address;
2700 }
2701
2702
2703
2704 #define DEFINE_GETSCALARARRAYELEMENTS(ElementTag,ElementType,Result, Tag \
2705 , EntryProbe, ReturnProbe) \
2706 \
2707 JNI_QUICK_ENTRY(ElementType*, \
2708 jni_Get##Result##ArrayElements(JNIEnv *env, ElementType##Array array, jboolean *isCopy)) \
2709 JNIWrapper("Get" XSTR(Result) "ArrayElements"); \
2710 EntryProbe; \
2711 /* allocate an chunk of memory in c land */ \
2712 typeArrayOop a = typeArrayOop(JNIHandles::resolve_non_null(array)); \
2713 ElementType* result; \
2714 int len = a->length(); \
2715 if (len == 0) { \
2716 /* Empty array: legal but useless, can't return NULL. \
2717 * Return a pointer to something useless. \
2718 * Avoid asserts in typeArrayOop. */ \
2719 result = (ElementType*)get_bad_address(); \
2720 } else { \
2721 /* JNI Specification states return NULL on OOM */ \
2722 result = NEW_C_HEAP_ARRAY_RETURN_NULL(ElementType, len, mtInternal); \
2723 if (result != NULL) { \
2724 /* copy the array to the c chunk */ \
2725 memcpy(result, a->Tag##_at_addr(0), sizeof(ElementType)*len); \
2726 if (isCopy) { \
2727 *isCopy = JNI_TRUE; \
2728 } \
2729 } \
2730 } \
2731 ReturnProbe; \
2732 return result; \
2733 JNI_END
2734
2735 DEFINE_GETSCALARARRAYELEMENTS(T_BOOLEAN, jboolean, Boolean, bool
2736 , HOTSPOT_JNI_GETBOOLEANARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy),
2737 HOTSPOT_JNI_GETBOOLEANARRAYELEMENTS_RETURN((uintptr_t*)result))
2738 DEFINE_GETSCALARARRAYELEMENTS(T_BYTE, jbyte, Byte, byte
2739 , HOTSPOT_JNI_GETBYTEARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy),
2740 HOTSPOT_JNI_GETBYTEARRAYELEMENTS_RETURN((char*)result))
2741 DEFINE_GETSCALARARRAYELEMENTS(T_SHORT, jshort, Short, short
2742 , HOTSPOT_JNI_GETSHORTARRAYELEMENTS_ENTRY(env, (uint16_t*) array, (uintptr_t *) isCopy),
2743 HOTSPOT_JNI_GETSHORTARRAYELEMENTS_RETURN((uint16_t*)result))
2744 DEFINE_GETSCALARARRAYELEMENTS(T_CHAR, jchar, Char, char
2745 , HOTSPOT_JNI_GETCHARARRAYELEMENTS_ENTRY(env, (uint16_t*) array, (uintptr_t *) isCopy),
2746 HOTSPOT_JNI_GETCHARARRAYELEMENTS_RETURN(result))
2747 DEFINE_GETSCALARARRAYELEMENTS(T_INT, jint, Int, int
2748 , HOTSPOT_JNI_GETINTARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy),
2749 HOTSPOT_JNI_GETINTARRAYELEMENTS_RETURN((uint32_t*)result))
2750 DEFINE_GETSCALARARRAYELEMENTS(T_LONG, jlong, Long, long
2751 , HOTSPOT_JNI_GETLONGARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy),
2752 HOTSPOT_JNI_GETLONGARRAYELEMENTS_RETURN(((uintptr_t*)result)))
2753 // Float and double probes don't return value because dtrace doesn't currently support it
2754 DEFINE_GETSCALARARRAYELEMENTS(T_FLOAT, jfloat, Float, float
2755 , HOTSPOT_JNI_GETFLOATARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy),
2756 HOTSPOT_JNI_GETFLOATARRAYELEMENTS_RETURN(result))
2757 DEFINE_GETSCALARARRAYELEMENTS(T_DOUBLE, jdouble, Double, double
2758 , HOTSPOT_JNI_GETDOUBLEARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy),
2759 HOTSPOT_JNI_GETDOUBLEARRAYELEMENTS_RETURN(result))
2760
2761
2762 #define DEFINE_RELEASESCALARARRAYELEMENTS(ElementTag,ElementType,Result,Tag \
2763 , EntryProbe, ReturnProbe);\
2764 \
2765 JNI_QUICK_ENTRY(void, \
2766 jni_Release##Result##ArrayElements(JNIEnv *env, ElementType##Array array, \
2767 ElementType *buf, jint mode)) \
2768 JNIWrapper("Release" XSTR(Result) "ArrayElements"); \
2769 EntryProbe; \
2770 typeArrayOop a = typeArrayOop(JNIHandles::resolve_non_null(array)); \
2771 int len = a->length(); \
2772 if (len != 0) { /* Empty array: nothing to free or copy. */ \
2773 if ((mode == 0) || (mode == JNI_COMMIT)) { \
2774 memcpy(a->Tag##_at_addr(0), buf, sizeof(ElementType)*len); \
2775 } \
2776 if ((mode == 0) || (mode == JNI_ABORT)) { \
2777 FreeHeap(buf); \
2778 } \
2779 } \
2780 ReturnProbe; \
2781 JNI_END
2782
2783 DEFINE_RELEASESCALARARRAYELEMENTS(T_BOOLEAN, jboolean, Boolean, bool
2784 , HOTSPOT_JNI_RELEASEBOOLEANARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) buf, mode),
2785 HOTSPOT_JNI_RELEASEBOOLEANARRAYELEMENTS_RETURN())
2786 DEFINE_RELEASESCALARARRAYELEMENTS(T_BYTE, jbyte, Byte, byte
2787 , HOTSPOT_JNI_RELEASEBYTEARRAYELEMENTS_ENTRY(env, array, (char *) buf, mode),
2788 HOTSPOT_JNI_RELEASEBYTEARRAYELEMENTS_RETURN())
2789 DEFINE_RELEASESCALARARRAYELEMENTS(T_SHORT, jshort, Short, short
2790 , HOTSPOT_JNI_RELEASESHORTARRAYELEMENTS_ENTRY(env, array, (uint16_t *) buf, mode),
2791 HOTSPOT_JNI_RELEASESHORTARRAYELEMENTS_RETURN())
2792 DEFINE_RELEASESCALARARRAYELEMENTS(T_CHAR, jchar, Char, char
2793 , HOTSPOT_JNI_RELEASECHARARRAYELEMENTS_ENTRY(env, array, (uint16_t *) buf, mode),
2794 HOTSPOT_JNI_RELEASECHARARRAYELEMENTS_RETURN())
2795 DEFINE_RELEASESCALARARRAYELEMENTS(T_INT, jint, Int, int
2796 , HOTSPOT_JNI_RELEASEINTARRAYELEMENTS_ENTRY(env, array, (uint32_t *) buf, mode),
2797 HOTSPOT_JNI_RELEASEINTARRAYELEMENTS_RETURN())
2798 DEFINE_RELEASESCALARARRAYELEMENTS(T_LONG, jlong, Long, long
2799 , HOTSPOT_JNI_RELEASELONGARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) buf, mode),
2800 HOTSPOT_JNI_RELEASELONGARRAYELEMENTS_RETURN())
2801 DEFINE_RELEASESCALARARRAYELEMENTS(T_FLOAT, jfloat, Float, float
2802 , HOTSPOT_JNI_RELEASEFLOATARRAYELEMENTS_ENTRY(env, array, (float *) buf, mode),
2803 HOTSPOT_JNI_RELEASEFLOATARRAYELEMENTS_RETURN())
2804 DEFINE_RELEASESCALARARRAYELEMENTS(T_DOUBLE, jdouble, Double, double
2805 , HOTSPOT_JNI_RELEASEDOUBLEARRAYELEMENTS_ENTRY(env, array, (double *) buf, mode),
2806 HOTSPOT_JNI_RELEASEDOUBLEARRAYELEMENTS_RETURN())
2807
2808
2809 #define DEFINE_GETSCALARARRAYREGION(ElementTag,ElementType,Result, Tag \
2810 , EntryProbe, ReturnProbe); \
2811 DT_VOID_RETURN_MARK_DECL(Get##Result##ArrayRegion \
2812 , ReturnProbe); \
2813 \
2814 JNI_ENTRY(void, \
2815 jni_Get##Result##ArrayRegion(JNIEnv *env, ElementType##Array array, jsize start, \
2816 jsize len, ElementType *buf)) \
2817 JNIWrapper("Get" XSTR(Result) "ArrayRegion"); \
2818 EntryProbe; \
2819 DT_VOID_RETURN_MARK(Get##Result##ArrayRegion); \
2820 typeArrayOop src = typeArrayOop(JNIHandles::resolve_non_null(array)); \
2821 if (start < 0 || len < 0 || ((unsigned int)start + (unsigned int)len > (unsigned int)src->length())) { \
2822 THROW(vmSymbols::java_lang_ArrayIndexOutOfBoundsException()); \
2823 } else { \
2824 if (len > 0) { \
2825 int sc = TypeArrayKlass::cast(src->klass())->log2_element_size(); \
2826 memcpy((u_char*) buf, \
2827 (u_char*) src->Tag##_at_addr(start), \
2828 len << sc); \
2829 } \
2830 } \
2831 JNI_END
2832
2833 DEFINE_GETSCALARARRAYREGION(T_BOOLEAN, jboolean,Boolean, bool
2834 , HOTSPOT_JNI_GETBOOLEANARRAYREGION_ENTRY(env, array, start, len, (uintptr_t *) buf),
2835 HOTSPOT_JNI_GETBOOLEANARRAYREGION_RETURN());
2836 DEFINE_GETSCALARARRAYREGION(T_BYTE, jbyte, Byte, byte
2837 , HOTSPOT_JNI_GETBYTEARRAYREGION_ENTRY(env, array, start, len, (char *) buf),
2838 HOTSPOT_JNI_GETBYTEARRAYREGION_RETURN());
2839 DEFINE_GETSCALARARRAYREGION(T_SHORT, jshort, Short, short
2840 , HOTSPOT_JNI_GETSHORTARRAYREGION_ENTRY(env, array, start, len, (uint16_t *) buf),
2841 HOTSPOT_JNI_GETSHORTARRAYREGION_RETURN());
2842 DEFINE_GETSCALARARRAYREGION(T_CHAR, jchar, Char, char
2843 , HOTSPOT_JNI_GETCHARARRAYREGION_ENTRY(env, array, start, len, (uint16_t*) buf),
2844 HOTSPOT_JNI_GETCHARARRAYREGION_RETURN());
2845 DEFINE_GETSCALARARRAYREGION(T_INT, jint, Int, int
2846 , HOTSPOT_JNI_GETINTARRAYREGION_ENTRY(env, array, start, len, (uint32_t*) buf),
2847 HOTSPOT_JNI_GETINTARRAYREGION_RETURN());
2848 DEFINE_GETSCALARARRAYREGION(T_LONG, jlong, Long, long
2849 , HOTSPOT_JNI_GETLONGARRAYREGION_ENTRY(env, array, start, len, (uintptr_t *) buf),
2850 HOTSPOT_JNI_GETLONGARRAYREGION_RETURN());
2851 DEFINE_GETSCALARARRAYREGION(T_FLOAT, jfloat, Float, float
2852 , HOTSPOT_JNI_GETFLOATARRAYREGION_ENTRY(env, array, start, len, (float *) buf),
2853 HOTSPOT_JNI_GETFLOATARRAYREGION_RETURN());
2854 DEFINE_GETSCALARARRAYREGION(T_DOUBLE, jdouble, Double, double
2855 , HOTSPOT_JNI_GETDOUBLEARRAYREGION_ENTRY(env, array, start, len, (double *) buf),
2856 HOTSPOT_JNI_GETDOUBLEARRAYREGION_RETURN());
2857
2858
2859 #define DEFINE_SETSCALARARRAYREGION(ElementTag,ElementType,Result, Tag \
2860 , EntryProbe, ReturnProbe); \
2861 DT_VOID_RETURN_MARK_DECL(Set##Result##ArrayRegion \
2862 ,ReturnProbe); \
2863 \
2864 JNI_ENTRY(void, \
2865 jni_Set##Result##ArrayRegion(JNIEnv *env, ElementType##Array array, jsize start, \
2866 jsize len, const ElementType *buf)) \
2867 JNIWrapper("Set" XSTR(Result) "ArrayRegion"); \
2868 EntryProbe; \
2869 DT_VOID_RETURN_MARK(Set##Result##ArrayRegion); \
2870 typeArrayOop dst = typeArrayOop(JNIHandles::resolve_non_null(array)); \
2871 if (start < 0 || len < 0 || ((unsigned int)start + (unsigned int)len > (unsigned int)dst->length())) { \
2872 THROW(vmSymbols::java_lang_ArrayIndexOutOfBoundsException()); \
2873 } else { \
2874 if (len > 0) { \
2875 int sc = TypeArrayKlass::cast(dst->klass())->log2_element_size(); \
2876 memcpy((u_char*) dst->Tag##_at_addr(start), \
2877 (u_char*) buf, \
2878 len << sc); \
2879 } \
2880 } \
2881 JNI_END
2882
2883 DEFINE_SETSCALARARRAYREGION(T_BOOLEAN, jboolean, Boolean, bool
2884 , HOTSPOT_JNI_SETBOOLEANARRAYREGION_ENTRY(env, array, start, len, (uintptr_t *)buf),
2885 HOTSPOT_JNI_SETBOOLEANARRAYREGION_RETURN())
2886 DEFINE_SETSCALARARRAYREGION(T_BYTE, jbyte, Byte, byte
2887 , HOTSPOT_JNI_SETBYTEARRAYREGION_ENTRY(env, array, start, len, (char *) buf),
2888 HOTSPOT_JNI_SETBYTEARRAYREGION_RETURN())
2889 DEFINE_SETSCALARARRAYREGION(T_SHORT, jshort, Short, short
2890 , HOTSPOT_JNI_SETSHORTARRAYREGION_ENTRY(env, array, start, len, (uint16_t *) buf),
2891 HOTSPOT_JNI_SETSHORTARRAYREGION_RETURN())
2892 DEFINE_SETSCALARARRAYREGION(T_CHAR, jchar, Char, char
2893 , HOTSPOT_JNI_SETCHARARRAYREGION_ENTRY(env, array, start, len, (uint16_t *) buf),
2894 HOTSPOT_JNI_SETCHARARRAYREGION_RETURN())
2895 DEFINE_SETSCALARARRAYREGION(T_INT, jint, Int, int
2896 , HOTSPOT_JNI_SETINTARRAYREGION_ENTRY(env, array, start, len, (uint32_t *) buf),
2897 HOTSPOT_JNI_SETINTARRAYREGION_RETURN())
2898 DEFINE_SETSCALARARRAYREGION(T_LONG, jlong, Long, long
2899 , HOTSPOT_JNI_SETLONGARRAYREGION_ENTRY(env, array, start, len, (uintptr_t *) buf),
2900 HOTSPOT_JNI_SETLONGARRAYREGION_RETURN())
2901 DEFINE_SETSCALARARRAYREGION(T_FLOAT, jfloat, Float, float
2902 , HOTSPOT_JNI_SETFLOATARRAYREGION_ENTRY(env, array, start, len, (float *) buf),
2903 HOTSPOT_JNI_SETFLOATARRAYREGION_RETURN())
2904 DEFINE_SETSCALARARRAYREGION(T_DOUBLE, jdouble, Double, double
2905 , HOTSPOT_JNI_SETDOUBLEARRAYREGION_ENTRY(env, array, start, len, (double *) buf),
2906 HOTSPOT_JNI_SETDOUBLEARRAYREGION_RETURN())
2907
2908
2909 //
2910 // Interception of natives
2911 //
2912
2913 // The RegisterNatives call being attempted tried to register with a method that
2914 // is not native. Ask JVM TI what prefixes have been specified. Then check
2915 // to see if the native method is now wrapped with the prefixes. See the
2916 // SetNativeMethodPrefix(es) functions in the JVM TI Spec for details.
2917 static Method* find_prefixed_native(KlassHandle k,
2918 Symbol* name, Symbol* signature, TRAPS) {
2919 #if INCLUDE_JVMTI
2920 ResourceMark rm(THREAD);
2921 Method* method;
2922 int name_len = name->utf8_length();
2923 char* name_str = name->as_utf8();
2924 int prefix_count;
2925 char** prefixes = JvmtiExport::get_all_native_method_prefixes(&prefix_count);
2926 for (int i = 0; i < prefix_count; i++) {
2927 char* prefix = prefixes[i];
2928 int prefix_len = (int)strlen(prefix);
2929
2930 // try adding this prefix to the method name and see if it matches another method name
2931 int trial_len = name_len + prefix_len;
2932 char* trial_name_str = NEW_RESOURCE_ARRAY(char, trial_len + 1);
2933 strcpy(trial_name_str, prefix);
2934 strcat(trial_name_str, name_str);
2935 TempNewSymbol trial_name = SymbolTable::probe(trial_name_str, trial_len);
2936 if (trial_name == NULL) {
2937 continue; // no such symbol, so this prefix wasn't used, try the next prefix
2938 }
2939 method = k()->lookup_method(trial_name, signature);
2940 if (method == NULL) {
2941 continue; // signature doesn't match, try the next prefix
2942 }
2943 if (method->is_native()) {
2944 method->set_is_prefixed_native();
2945 return method; // wahoo, we found a prefixed version of the method, return it
2946 }
2947 // found as non-native, so prefix is good, add it, probably just need more prefixes
2948 name_len = trial_len;
2949 name_str = trial_name_str;
2950 }
2951 #endif // INCLUDE_JVMTI
2952 return NULL; // not found
2953 }
2954
2955 static bool register_native(KlassHandle k, Symbol* name, Symbol* signature, address entry, TRAPS) {
2956 Method* method = k()->lookup_method(name, signature);
2957 if (method == NULL) {
2958 ResourceMark rm;
2959 stringStream st;
2960 st.print("Method %s name or signature does not match",
2961 Method::name_and_sig_as_C_string(k(), name, signature));
2962 THROW_MSG_(vmSymbols::java_lang_NoSuchMethodError(), st.as_string(), false);
2963 }
2964 if (!method->is_native()) {
2965 // trying to register to a non-native method, see if a JVM TI agent has added prefix(es)
2966 method = find_prefixed_native(k, name, signature, THREAD);
2967 if (method == NULL) {
2968 ResourceMark rm;
2969 stringStream st;
2970 st.print("Method %s is not declared as native",
2971 Method::name_and_sig_as_C_string(k(), name, signature));
2972 THROW_MSG_(vmSymbols::java_lang_NoSuchMethodError(), st.as_string(), false);
2973 }
2974 }
2975
2976 if (entry != NULL) {
2977 method->set_native_function(entry,
2978 Method::native_bind_event_is_interesting);
2979 } else {
2980 method->clear_native_function();
2981 }
2982 if (PrintJNIResolving) {
2983 ResourceMark rm(THREAD);
2984 tty->print_cr("[Registering JNI native method %s.%s]",
2985 method->method_holder()->external_name(),
2986 method->name()->as_C_string());
2987 }
2988 return true;
2989 }
2990
2991 DT_RETURN_MARK_DECL(RegisterNatives, jint
2992 , HOTSPOT_JNI_REGISTERNATIVES_RETURN(_ret_ref));
2993
2994 JNI_ENTRY(jint, jni_RegisterNatives(JNIEnv *env, jclass clazz,
2995 const JNINativeMethod *methods,
2996 jint nMethods))
2997 JNIWrapper("RegisterNatives");
2998 HOTSPOT_JNI_REGISTERNATIVES_ENTRY(env, clazz, (void *) methods, nMethods);
2999 jint ret = 0;
3000 DT_RETURN_MARK(RegisterNatives, jint, (const jint&)ret);
3001
3002 KlassHandle h_k(thread, java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz)));
3003
3004 for (int index = 0; index < nMethods; index++) {
3005 const char* meth_name = methods[index].name;
3006 const char* meth_sig = methods[index].signature;
3007 int meth_name_len = (int)strlen(meth_name);
3008
3009 // The class should have been loaded (we have an instance of the class
3010 // passed in) so the method and signature should already be in the symbol
3011 // table. If they're not there, the method doesn't exist.
3012 TempNewSymbol name = SymbolTable::probe(meth_name, meth_name_len);
3013 TempNewSymbol signature = SymbolTable::probe(meth_sig, (int)strlen(meth_sig));
3014
3015 if (name == NULL || signature == NULL) {
3016 ResourceMark rm;
3017 stringStream st;
3018 st.print("Method %s.%s%s not found", h_k()->external_name(), meth_name, meth_sig);
3019 // Must return negative value on failure
3020 THROW_MSG_(vmSymbols::java_lang_NoSuchMethodError(), st.as_string(), -1);
3021 }
3022
3023 bool res = register_native(h_k, name, signature,
3024 (address) methods[index].fnPtr, THREAD);
3025 if (!res) {
3026 ret = -1;
3027 break;
3028 }
3029 }
3030 return ret;
3031 JNI_END
3032
3033
3034 JNI_ENTRY(jint, jni_UnregisterNatives(JNIEnv *env, jclass clazz))
3035 JNIWrapper("UnregisterNatives");
3036 HOTSPOT_JNI_UNREGISTERNATIVES_ENTRY(env, clazz);
3037 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz));
3038 //%note jni_2
3039 if (k->is_instance_klass()) {
3040 for (int index = 0; index < InstanceKlass::cast(k)->methods()->length(); index++) {
3041 Method* m = InstanceKlass::cast(k)->methods()->at(index);
3042 if (m->is_native()) {
3043 m->clear_native_function();
3044 m->set_signature_handler(NULL);
3045 }
3046 }
3047 }
3048 HOTSPOT_JNI_UNREGISTERNATIVES_RETURN(0);
3049 return 0;
3050 JNI_END
3051
3052 //
3053 // Monitor functions
3054 //
3055
3056 DT_RETURN_MARK_DECL(MonitorEnter, jint
3057 , HOTSPOT_JNI_MONITORENTER_RETURN(_ret_ref));
3058
3059 JNI_ENTRY(jint, jni_MonitorEnter(JNIEnv *env, jobject jobj))
3060 HOTSPOT_JNI_MONITORENTER_ENTRY(env, jobj);
3061 jint ret = JNI_ERR;
3062 DT_RETURN_MARK(MonitorEnter, jint, (const jint&)ret);
3063
3064 // If the object is null, we can't do anything with it
3065 if (jobj == NULL) {
3066 THROW_(vmSymbols::java_lang_NullPointerException(), JNI_ERR);
3067 }
3068
3069 Handle obj(thread, JNIHandles::resolve_non_null(jobj));
3070 ObjectSynchronizer::jni_enter(obj, CHECK_(JNI_ERR));
3071 ret = JNI_OK;
3072 return ret;
3073 JNI_END
3074
3075 DT_RETURN_MARK_DECL(MonitorExit, jint
3076 , HOTSPOT_JNI_MONITOREXIT_RETURN(_ret_ref));
3077
3078 JNI_ENTRY(jint, jni_MonitorExit(JNIEnv *env, jobject jobj))
3079 HOTSPOT_JNI_MONITOREXIT_ENTRY(env, jobj);
3080 jint ret = JNI_ERR;
3081 DT_RETURN_MARK(MonitorExit, jint, (const jint&)ret);
3082
3083 // Don't do anything with a null object
3084 if (jobj == NULL) {
3085 THROW_(vmSymbols::java_lang_NullPointerException(), JNI_ERR);
3086 }
3087
3088 Handle obj(THREAD, JNIHandles::resolve_non_null(jobj));
3089 ObjectSynchronizer::jni_exit(obj(), CHECK_(JNI_ERR));
3090
3091 ret = JNI_OK;
3092 return ret;
3093 JNI_END
3094
3095 //
3096 // Extensions
3097 //
3098
3099 DT_VOID_RETURN_MARK_DECL(GetStringRegion
3100 , HOTSPOT_JNI_GETSTRINGREGION_RETURN());
3101
3102 JNI_ENTRY(void, jni_GetStringRegion(JNIEnv *env, jstring string, jsize start, jsize len, jchar *buf))
3103 JNIWrapper("GetStringRegion");
3104 HOTSPOT_JNI_GETSTRINGREGION_ENTRY(env, string, start, len, buf);
3105 DT_VOID_RETURN_MARK(GetStringRegion);
3106 oop s = JNIHandles::resolve_non_null(string);
3107 int s_len = java_lang_String::length(s);
3108 if (start < 0 || len < 0 || start + len > s_len) {
3109 THROW(vmSymbols::java_lang_StringIndexOutOfBoundsException());
3110 } else {
3111 if (len > 0) {
3112 typeArrayOop s_value = java_lang_String::value(s);
3113 bool is_latin1 = java_lang_String::is_latin1(s);
3114 if (!is_latin1) {
3115 memcpy(buf, s_value->char_at_addr(start), sizeof(jchar)*len);
3116 } else {
3117 for (int i = 0; i < len; i++) {
3118 buf[i] = ((jchar) s_value->byte_at(i + start)) & 0xff;
3119 }
3120 }
3121 }
3122 }
3123 JNI_END
3124
3125 DT_VOID_RETURN_MARK_DECL(GetStringUTFRegion
3126 , HOTSPOT_JNI_GETSTRINGUTFREGION_RETURN());
3127
3128 JNI_ENTRY(void, jni_GetStringUTFRegion(JNIEnv *env, jstring string, jsize start, jsize len, char *buf))
3129 JNIWrapper("GetStringUTFRegion");
3130 HOTSPOT_JNI_GETSTRINGUTFREGION_ENTRY(env, string, start, len, buf);
3131 DT_VOID_RETURN_MARK(GetStringUTFRegion);
3132 oop s = JNIHandles::resolve_non_null(string);
3133 int s_len = java_lang_String::length(s);
3134 if (start < 0 || len < 0 || start + len > s_len) {
3135 THROW(vmSymbols::java_lang_StringIndexOutOfBoundsException());
3136 } else {
3137 //%note jni_7
3138 if (len > 0) {
3139 // Assume the buffer is large enough as the JNI spec. does not require user error checking
3140 java_lang_String::as_utf8_string(s, start, len, buf, INT_MAX);
3141 // as_utf8_string null-terminates the result string
3142 } else {
3143 // JDK null-terminates the buffer even in len is zero
3144 if (buf != NULL) {
3145 buf[0] = 0;
3146 }
3147 }
3148 }
3149 JNI_END
3150
3151
3152 JNI_ENTRY(void*, jni_GetPrimitiveArrayCritical(JNIEnv *env, jarray array, jboolean *isCopy))
3153 JNIWrapper("GetPrimitiveArrayCritical");
3154 HOTSPOT_JNI_GETPRIMITIVEARRAYCRITICAL_ENTRY(env, array, (uintptr_t *) isCopy);
3155 GCLocker::lock_critical(thread);
3156 if (isCopy != NULL) {
3157 *isCopy = JNI_FALSE;
3158 }
3159 oop a = JNIHandles::resolve_non_null(array);
3160 assert(a->is_array(), "just checking");
3161 BasicType type;
3162 if (a->is_objArray()) {
3163 type = T_OBJECT;
3164 } else {
3165 type = TypeArrayKlass::cast(a->klass())->element_type();
3166 }
3167 void* ret = arrayOop(a)->base(type);
3168 HOTSPOT_JNI_GETPRIMITIVEARRAYCRITICAL_RETURN(ret);
3169 return ret;
3170 JNI_END
3171
3172
3173 JNI_ENTRY(void, jni_ReleasePrimitiveArrayCritical(JNIEnv *env, jarray array, void *carray, jint mode))
3174 JNIWrapper("ReleasePrimitiveArrayCritical");
3175 HOTSPOT_JNI_RELEASEPRIMITIVEARRAYCRITICAL_ENTRY(env, array, carray, mode);
3176 // The array, carray and mode arguments are ignored
3177 GCLocker::unlock_critical(thread);
3178 HOTSPOT_JNI_RELEASEPRIMITIVEARRAYCRITICAL_RETURN();
3179 JNI_END
3180
3181
3182 JNI_ENTRY(const jchar*, jni_GetStringCritical(JNIEnv *env, jstring string, jboolean *isCopy))
3183 JNIWrapper("GetStringCritical");
3184 HOTSPOT_JNI_GETSTRINGCRITICAL_ENTRY(env, string, (uintptr_t *) isCopy);
3185 GCLocker::lock_critical(thread);
3186 oop s = JNIHandles::resolve_non_null(string);
3187 typeArrayOop s_value = java_lang_String::value(s);
3188 bool is_latin1 = java_lang_String::is_latin1(s);
3189 if (isCopy != NULL) {
3190 *isCopy = is_latin1 ? JNI_TRUE : JNI_FALSE;
3191 }
3192 jchar* ret;
3193 if (!is_latin1) {
3194 ret = (jchar*) s_value->base(T_CHAR);
3195 } else {
3196 // Inflate latin1 encoded string to UTF16
3197 int s_len = java_lang_String::length(s);
3198 ret = NEW_C_HEAP_ARRAY_RETURN_NULL(jchar, s_len + 1, mtInternal); // add one for zero termination
3199 /* JNI Specification states return NULL on OOM */
3200 if (ret != NULL) {
3201 for (int i = 0; i < s_len; i++) {
3202 ret[i] = ((jchar) s_value->byte_at(i)) & 0xff;
3203 }
3204 ret[s_len] = 0;
3205 }
3206 }
3207 HOTSPOT_JNI_GETSTRINGCRITICAL_RETURN((uint16_t *) ret);
3208 return ret;
3209 JNI_END
3210
3211
3212 JNI_ENTRY(void, jni_ReleaseStringCritical(JNIEnv *env, jstring str, const jchar *chars))
3213 JNIWrapper("ReleaseStringCritical");
3214 HOTSPOT_JNI_RELEASESTRINGCRITICAL_ENTRY(env, str, (uint16_t *) chars);
3215 // The str and chars arguments are ignored for UTF16 strings
3216 oop s = JNIHandles::resolve_non_null(str);
3217 bool is_latin1 = java_lang_String::is_latin1(s);
3218 if (is_latin1) {
3219 // For latin1 string, free jchar array allocated by earlier call to GetStringCritical.
3220 // This assumes that ReleaseStringCritical bookends GetStringCritical.
3221 FREE_C_HEAP_ARRAY(jchar, chars);
3222 }
3223 GCLocker::unlock_critical(thread);
3224 HOTSPOT_JNI_RELEASESTRINGCRITICAL_RETURN();
3225 JNI_END
3226
3227
3228 JNI_ENTRY(jweak, jni_NewWeakGlobalRef(JNIEnv *env, jobject ref))
3229 JNIWrapper("jni_NewWeakGlobalRef");
3230 HOTSPOT_JNI_NEWWEAKGLOBALREF_ENTRY(env, ref);
3231 Handle ref_handle(thread, JNIHandles::resolve(ref));
3232 jweak ret = JNIHandles::make_weak_global(ref_handle);
3233 HOTSPOT_JNI_NEWWEAKGLOBALREF_RETURN(ret);
3234 return ret;
3235 JNI_END
3236
3237 // Must be JNI_ENTRY (with HandleMark)
3238 JNI_ENTRY(void, jni_DeleteWeakGlobalRef(JNIEnv *env, jweak ref))
3239 JNIWrapper("jni_DeleteWeakGlobalRef");
3240 HOTSPOT_JNI_DELETEWEAKGLOBALREF_ENTRY(env, ref);
3241 JNIHandles::destroy_weak_global(ref);
3242 HOTSPOT_JNI_DELETEWEAKGLOBALREF_RETURN();
3243 JNI_END
3244
3245
3246 JNI_QUICK_ENTRY(jboolean, jni_ExceptionCheck(JNIEnv *env))
3247 JNIWrapper("jni_ExceptionCheck");
3248 HOTSPOT_JNI_EXCEPTIONCHECK_ENTRY(env);
3249 jni_check_async_exceptions(thread);
3250 jboolean ret = (thread->has_pending_exception()) ? JNI_TRUE : JNI_FALSE;
3251 HOTSPOT_JNI_EXCEPTIONCHECK_RETURN(ret);
3252 return ret;
3253 JNI_END
3254
3255
3256 // Initialization state for three routines below relating to
3257 // java.nio.DirectBuffers
3258 static jint directBufferSupportInitializeStarted = 0;
3259 static volatile jint directBufferSupportInitializeEnded = 0;
3260 static volatile jint directBufferSupportInitializeFailed = 0;
3261 static jclass bufferClass = NULL;
3262 static jclass directBufferClass = NULL;
3263 static jclass directByteBufferClass = NULL;
3264 static jmethodID directByteBufferConstructor = NULL;
3265 static jfieldID directBufferAddressField = NULL;
3266 static jfieldID bufferCapacityField = NULL;
3267
3268 static jclass lookupOne(JNIEnv* env, const char* name, TRAPS) {
3269 Handle loader; // null (bootstrap) loader
3270 Handle protection_domain; // null protection domain
3271
3272 TempNewSymbol sym = SymbolTable::new_symbol(name, CHECK_NULL);
3273 jclass result = find_class_from_class_loader(env, sym, true, loader, protection_domain, true, CHECK_NULL);
3274
3275 if (log_is_enabled(Debug, classresolve) && result != NULL) {
3276 trace_class_resolution(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(result)));
3277 }
3278 return result;
3279 }
3280
3281 // These lookups are done with the NULL (bootstrap) ClassLoader to
3282 // circumvent any security checks that would be done by jni_FindClass.
3283 JNI_ENTRY(bool, lookupDirectBufferClasses(JNIEnv* env))
3284 {
3285 if ((bufferClass = lookupOne(env, "java/nio/Buffer", thread)) == NULL) { return false; }
3286 if ((directBufferClass = lookupOne(env, "sun/nio/ch/DirectBuffer", thread)) == NULL) { return false; }
3287 if ((directByteBufferClass = lookupOne(env, "java/nio/DirectByteBuffer", thread)) == NULL) { return false; }
3288 return true;
3289 }
3290 JNI_END
3291
3292
3293 static bool initializeDirectBufferSupport(JNIEnv* env, JavaThread* thread) {
3294 if (directBufferSupportInitializeFailed) {
3295 return false;
3296 }
3297
3298 if (Atomic::cmpxchg(1, &directBufferSupportInitializeStarted, 0) == 0) {
3299 if (!lookupDirectBufferClasses(env)) {
3300 directBufferSupportInitializeFailed = 1;
3301 return false;
3302 }
3303
3304 // Make global references for these
3305 bufferClass = (jclass) env->NewGlobalRef(bufferClass);
3306 directBufferClass = (jclass) env->NewGlobalRef(directBufferClass);
3307 directByteBufferClass = (jclass) env->NewGlobalRef(directByteBufferClass);
3308
3309 // Get needed field and method IDs
3310 directByteBufferConstructor = env->GetMethodID(directByteBufferClass, "<init>", "(JI)V");
3311 if (env->ExceptionCheck()) {
3312 env->ExceptionClear();
3313 directBufferSupportInitializeFailed = 1;
3314 return false;
3315 }
3316 directBufferAddressField = env->GetFieldID(bufferClass, "address", "J");
3317 if (env->ExceptionCheck()) {
3318 env->ExceptionClear();
3319 directBufferSupportInitializeFailed = 1;
3320 return false;
3321 }
3322 bufferCapacityField = env->GetFieldID(bufferClass, "capacity", "I");
3323 if (env->ExceptionCheck()) {
3324 env->ExceptionClear();
3325 directBufferSupportInitializeFailed = 1;
3326 return false;
3327 }
3328
3329 if ((directByteBufferConstructor == NULL) ||
3330 (directBufferAddressField == NULL) ||
3331 (bufferCapacityField == NULL)) {
3332 directBufferSupportInitializeFailed = 1;
3333 return false;
3334 }
3335
3336 directBufferSupportInitializeEnded = 1;
3337 } else {
3338 while (!directBufferSupportInitializeEnded && !directBufferSupportInitializeFailed) {
3339 os::naked_yield();
3340 }
3341 }
3342
3343 return !directBufferSupportInitializeFailed;
3344 }
3345
3346 extern "C" jobject JNICALL jni_NewDirectByteBuffer(JNIEnv *env, void* address, jlong capacity)
3347 {
3348 // thread_from_jni_environment() will block if VM is gone.
3349 JavaThread* thread = JavaThread::thread_from_jni_environment(env);
3350
3351 JNIWrapper("jni_NewDirectByteBuffer");
3352 HOTSPOT_JNI_NEWDIRECTBYTEBUFFER_ENTRY(env, address, capacity);
3353
3354 if (!directBufferSupportInitializeEnded) {
3355 if (!initializeDirectBufferSupport(env, thread)) {
3356 HOTSPOT_JNI_NEWDIRECTBYTEBUFFER_RETURN(NULL);
3357 return NULL;
3358 }
3359 }
3360
3361 // Being paranoid about accidental sign extension on address
3362 jlong addr = (jlong) ((uintptr_t) address);
3363 // NOTE that package-private DirectByteBuffer constructor currently
3364 // takes int capacity
3365 jint cap = (jint) capacity;
3366 jobject ret = env->NewObject(directByteBufferClass, directByteBufferConstructor, addr, cap);
3367 HOTSPOT_JNI_NEWDIRECTBYTEBUFFER_RETURN(ret);
3368 return ret;
3369 }
3370
3371 DT_RETURN_MARK_DECL(GetDirectBufferAddress, void*
3372 , HOTSPOT_JNI_GETDIRECTBUFFERADDRESS_RETURN((void*) _ret_ref));
3373
3374 extern "C" void* JNICALL jni_GetDirectBufferAddress(JNIEnv *env, jobject buf)
3375 {
3376 // thread_from_jni_environment() will block if VM is gone.
3377 JavaThread* thread = JavaThread::thread_from_jni_environment(env);
3378
3379 JNIWrapper("jni_GetDirectBufferAddress");
3380 HOTSPOT_JNI_GETDIRECTBUFFERADDRESS_ENTRY(env, buf);
3381 void* ret = NULL;
3382 DT_RETURN_MARK(GetDirectBufferAddress, void*, (const void*&)ret);
3383
3384 if (!directBufferSupportInitializeEnded) {
3385 if (!initializeDirectBufferSupport(env, thread)) {
3386 return 0;
3387 }
3388 }
3389
3390 if ((buf != NULL) && (!env->IsInstanceOf(buf, directBufferClass))) {
3391 return 0;
3392 }
3393
3394 ret = (void*)(intptr_t)env->GetLongField(buf, directBufferAddressField);
3395 return ret;
3396 }
3397
3398 DT_RETURN_MARK_DECL(GetDirectBufferCapacity, jlong
3399 , HOTSPOT_JNI_GETDIRECTBUFFERCAPACITY_RETURN(_ret_ref));
3400
3401 extern "C" jlong JNICALL jni_GetDirectBufferCapacity(JNIEnv *env, jobject buf)
3402 {
3403 // thread_from_jni_environment() will block if VM is gone.
3404 JavaThread* thread = JavaThread::thread_from_jni_environment(env);
3405
3406 JNIWrapper("jni_GetDirectBufferCapacity");
3407 HOTSPOT_JNI_GETDIRECTBUFFERCAPACITY_ENTRY(env, buf);
3408 jlong ret = -1;
3409 DT_RETURN_MARK(GetDirectBufferCapacity, jlong, (const jlong&)ret);
3410
3411 if (!directBufferSupportInitializeEnded) {
3412 if (!initializeDirectBufferSupport(env, thread)) {
3413 ret = 0;
3414 return ret;
3415 }
3416 }
3417
3418 if (buf == NULL) {
3419 return -1;
3420 }
3421
3422 if (!env->IsInstanceOf(buf, directBufferClass)) {
3423 return -1;
3424 }
3425
3426 // NOTE that capacity is currently an int in the implementation
3427 ret = env->GetIntField(buf, bufferCapacityField);
3428 return ret;
3429 }
3430
3431
3432 JNI_LEAF(jint, jni_GetVersion(JNIEnv *env))
3433 JNIWrapper("GetVersion");
3434 HOTSPOT_JNI_GETVERSION_ENTRY(env);
3435 HOTSPOT_JNI_GETVERSION_RETURN(CurrentVersion);
3436 return CurrentVersion;
3437 JNI_END
3438
3439 extern struct JavaVM_ main_vm;
3440
3441 JNI_LEAF(jint, jni_GetJavaVM(JNIEnv *env, JavaVM **vm))
3442 JNIWrapper("jni_GetJavaVM");
3443 HOTSPOT_JNI_GETJAVAVM_ENTRY(env, (void **) vm);
3444 *vm = (JavaVM *)(&main_vm);
3445 HOTSPOT_JNI_GETJAVAVM_RETURN(JNI_OK);
3446 return JNI_OK;
3447 JNI_END
3448
3449
3450 JNI_ENTRY(jobject, jni_GetModule(JNIEnv* env, jclass clazz))
3451 JNIWrapper("GetModule");
3452 return Modules::get_module(clazz, THREAD);
3453 JNI_END
3454
3455
3456 JNI_ENTRY(void, jni_AddModuleReads(JNIEnv* env, jobject m1, jobject m2))
3457 JNIWrapper("AddModuleReads");
3458 if (m1 == NULL || m2 == NULL) {
3459 THROW(vmSymbols::java_lang_NullPointerException());
3460 }
3461 JavaValue result(T_VOID);
3462 Handle m1_h(THREAD, JNIHandles::resolve(m1));
3463 if (!java_lang_reflect_Module::is_instance(m1_h())) {
3464 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "Bad m1 object");
3465 }
3466 Handle m2_h(THREAD, JNIHandles::resolve(m2));
3467 if (!java_lang_reflect_Module::is_instance(m2_h())) {
3468 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "Bad m2 object");
3469 }
3470 JavaCalls::call_static(&result,
3471 KlassHandle(THREAD, SystemDictionary::module_Modules_klass()),
3472 vmSymbols::addReads_name(),
3473 vmSymbols::addReads_signature(),
3474 m1_h,
3475 m2_h,
3476 THREAD);
3477 JNI_END
3478
3479
3480 JNI_ENTRY(jboolean, jni_CanReadModule(JNIEnv* env, jobject m1, jobject m2))
3481 JNIWrapper("CanReadModule");
3482 if (m1 == NULL || m2 == NULL) {
3483 THROW_(vmSymbols::java_lang_NullPointerException(), JNI_FALSE);
3484 }
3485 jboolean res = Modules::can_read_module(m1, m2, CHECK_false);
3486 return res;
3487 JNI_END
3488
3489
3490 // Structure containing all jni functions
3491 struct JNINativeInterface_ jni_NativeInterface = {
3492 NULL,
3493 NULL,
3494 NULL,
3495
3496 NULL,
3497
3498 jni_GetVersion,
3499
3500 jni_DefineClass,
3501 jni_FindClass,
3502
3503 jni_FromReflectedMethod,
3504 jni_FromReflectedField,
3505
3506 jni_ToReflectedMethod,
3507
3508 jni_GetSuperclass,
3509 jni_IsAssignableFrom,
3510
3511 jni_ToReflectedField,
3512
3513 jni_Throw,
3514 jni_ThrowNew,
3515 jni_ExceptionOccurred,
3516 jni_ExceptionDescribe,
3517 jni_ExceptionClear,
3518 jni_FatalError,
3519
3520 jni_PushLocalFrame,
3521 jni_PopLocalFrame,
3522
3523 jni_NewGlobalRef,
3524 jni_DeleteGlobalRef,
3525 jni_DeleteLocalRef,
3526 jni_IsSameObject,
3527
3528 jni_NewLocalRef,
3529 jni_EnsureLocalCapacity,
3530
3531 jni_AllocObject,
3532 jni_NewObject,
3533 jni_NewObjectV,
3534 jni_NewObjectA,
3535
3536 jni_GetObjectClass,
3537 jni_IsInstanceOf,
3538
3539 jni_GetMethodID,
3540
3541 jni_CallObjectMethod,
3542 jni_CallObjectMethodV,
3543 jni_CallObjectMethodA,
3544 jni_CallBooleanMethod,
3545 jni_CallBooleanMethodV,
3546 jni_CallBooleanMethodA,
3547 jni_CallByteMethod,
3548 jni_CallByteMethodV,
3549 jni_CallByteMethodA,
3550 jni_CallCharMethod,
3551 jni_CallCharMethodV,
3552 jni_CallCharMethodA,
3553 jni_CallShortMethod,
3554 jni_CallShortMethodV,
3555 jni_CallShortMethodA,
3556 jni_CallIntMethod,
3557 jni_CallIntMethodV,
3558 jni_CallIntMethodA,
3559 jni_CallLongMethod,
3560 jni_CallLongMethodV,
3561 jni_CallLongMethodA,
3562 jni_CallFloatMethod,
3563 jni_CallFloatMethodV,
3564 jni_CallFloatMethodA,
3565 jni_CallDoubleMethod,
3566 jni_CallDoubleMethodV,
3567 jni_CallDoubleMethodA,
3568 jni_CallVoidMethod,
3569 jni_CallVoidMethodV,
3570 jni_CallVoidMethodA,
3571
3572 jni_CallNonvirtualObjectMethod,
3573 jni_CallNonvirtualObjectMethodV,
3574 jni_CallNonvirtualObjectMethodA,
3575 jni_CallNonvirtualBooleanMethod,
3576 jni_CallNonvirtualBooleanMethodV,
3577 jni_CallNonvirtualBooleanMethodA,
3578 jni_CallNonvirtualByteMethod,
3579 jni_CallNonvirtualByteMethodV,
3580 jni_CallNonvirtualByteMethodA,
3581 jni_CallNonvirtualCharMethod,
3582 jni_CallNonvirtualCharMethodV,
3583 jni_CallNonvirtualCharMethodA,
3584 jni_CallNonvirtualShortMethod,
3585 jni_CallNonvirtualShortMethodV,
3586 jni_CallNonvirtualShortMethodA,
3587 jni_CallNonvirtualIntMethod,
3588 jni_CallNonvirtualIntMethodV,
3589 jni_CallNonvirtualIntMethodA,
3590 jni_CallNonvirtualLongMethod,
3591 jni_CallNonvirtualLongMethodV,
3592 jni_CallNonvirtualLongMethodA,
3593 jni_CallNonvirtualFloatMethod,
3594 jni_CallNonvirtualFloatMethodV,
3595 jni_CallNonvirtualFloatMethodA,
3596 jni_CallNonvirtualDoubleMethod,
3597 jni_CallNonvirtualDoubleMethodV,
3598 jni_CallNonvirtualDoubleMethodA,
3599 jni_CallNonvirtualVoidMethod,
3600 jni_CallNonvirtualVoidMethodV,
3601 jni_CallNonvirtualVoidMethodA,
3602
3603 jni_GetFieldID,
3604
3605 jni_GetObjectField,
3606 jni_GetBooleanField,
3607 jni_GetByteField,
3608 jni_GetCharField,
3609 jni_GetShortField,
3610 jni_GetIntField,
3611 jni_GetLongField,
3612 jni_GetFloatField,
3613 jni_GetDoubleField,
3614
3615 jni_SetObjectField,
3616 jni_SetBooleanField,
3617 jni_SetByteField,
3618 jni_SetCharField,
3619 jni_SetShortField,
3620 jni_SetIntField,
3621 jni_SetLongField,
3622 jni_SetFloatField,
3623 jni_SetDoubleField,
3624
3625 jni_GetStaticMethodID,
3626
3627 jni_CallStaticObjectMethod,
3628 jni_CallStaticObjectMethodV,
3629 jni_CallStaticObjectMethodA,
3630 jni_CallStaticBooleanMethod,
3631 jni_CallStaticBooleanMethodV,
3632 jni_CallStaticBooleanMethodA,
3633 jni_CallStaticByteMethod,
3634 jni_CallStaticByteMethodV,
3635 jni_CallStaticByteMethodA,
3636 jni_CallStaticCharMethod,
3637 jni_CallStaticCharMethodV,
3638 jni_CallStaticCharMethodA,
3639 jni_CallStaticShortMethod,
3640 jni_CallStaticShortMethodV,
3641 jni_CallStaticShortMethodA,
3642 jni_CallStaticIntMethod,
3643 jni_CallStaticIntMethodV,
3644 jni_CallStaticIntMethodA,
3645 jni_CallStaticLongMethod,
3646 jni_CallStaticLongMethodV,
3647 jni_CallStaticLongMethodA,
3648 jni_CallStaticFloatMethod,
3649 jni_CallStaticFloatMethodV,
3650 jni_CallStaticFloatMethodA,
3651 jni_CallStaticDoubleMethod,
3652 jni_CallStaticDoubleMethodV,
3653 jni_CallStaticDoubleMethodA,
3654 jni_CallStaticVoidMethod,
3655 jni_CallStaticVoidMethodV,
3656 jni_CallStaticVoidMethodA,
3657
3658 jni_GetStaticFieldID,
3659
3660 jni_GetStaticObjectField,
3661 jni_GetStaticBooleanField,
3662 jni_GetStaticByteField,
3663 jni_GetStaticCharField,
3664 jni_GetStaticShortField,
3665 jni_GetStaticIntField,
3666 jni_GetStaticLongField,
3667 jni_GetStaticFloatField,
3668 jni_GetStaticDoubleField,
3669
3670 jni_SetStaticObjectField,
3671 jni_SetStaticBooleanField,
3672 jni_SetStaticByteField,
3673 jni_SetStaticCharField,
3674 jni_SetStaticShortField,
3675 jni_SetStaticIntField,
3676 jni_SetStaticLongField,
3677 jni_SetStaticFloatField,
3678 jni_SetStaticDoubleField,
3679
3680 jni_NewString,
3681 jni_GetStringLength,
3682 jni_GetStringChars,
3683 jni_ReleaseStringChars,
3684
3685 jni_NewStringUTF,
3686 jni_GetStringUTFLength,
3687 jni_GetStringUTFChars,
3688 jni_ReleaseStringUTFChars,
3689
3690 jni_GetArrayLength,
3691
3692 jni_NewObjectArray,
3693 jni_GetObjectArrayElement,
3694 jni_SetObjectArrayElement,
3695
3696 jni_NewBooleanArray,
3697 jni_NewByteArray,
3698 jni_NewCharArray,
3699 jni_NewShortArray,
3700 jni_NewIntArray,
3701 jni_NewLongArray,
3702 jni_NewFloatArray,
3703 jni_NewDoubleArray,
3704
3705 jni_GetBooleanArrayElements,
3706 jni_GetByteArrayElements,
3707 jni_GetCharArrayElements,
3708 jni_GetShortArrayElements,
3709 jni_GetIntArrayElements,
3710 jni_GetLongArrayElements,
3711 jni_GetFloatArrayElements,
3712 jni_GetDoubleArrayElements,
3713
3714 jni_ReleaseBooleanArrayElements,
3715 jni_ReleaseByteArrayElements,
3716 jni_ReleaseCharArrayElements,
3717 jni_ReleaseShortArrayElements,
3718 jni_ReleaseIntArrayElements,
3719 jni_ReleaseLongArrayElements,
3720 jni_ReleaseFloatArrayElements,
3721 jni_ReleaseDoubleArrayElements,
3722
3723 jni_GetBooleanArrayRegion,
3724 jni_GetByteArrayRegion,
3725 jni_GetCharArrayRegion,
3726 jni_GetShortArrayRegion,
3727 jni_GetIntArrayRegion,
3728 jni_GetLongArrayRegion,
3729 jni_GetFloatArrayRegion,
3730 jni_GetDoubleArrayRegion,
3731
3732 jni_SetBooleanArrayRegion,
3733 jni_SetByteArrayRegion,
3734 jni_SetCharArrayRegion,
3735 jni_SetShortArrayRegion,
3736 jni_SetIntArrayRegion,
3737 jni_SetLongArrayRegion,
3738 jni_SetFloatArrayRegion,
3739 jni_SetDoubleArrayRegion,
3740
3741 jni_RegisterNatives,
3742 jni_UnregisterNatives,
3743
3744 jni_MonitorEnter,
3745 jni_MonitorExit,
3746
3747 jni_GetJavaVM,
3748
3749 jni_GetStringRegion,
3750 jni_GetStringUTFRegion,
3751
3752 jni_GetPrimitiveArrayCritical,
3753 jni_ReleasePrimitiveArrayCritical,
3754
3755 jni_GetStringCritical,
3756 jni_ReleaseStringCritical,
3757
3758 jni_NewWeakGlobalRef,
3759 jni_DeleteWeakGlobalRef,
3760
3761 jni_ExceptionCheck,
3762
3763 jni_NewDirectByteBuffer,
3764 jni_GetDirectBufferAddress,
3765 jni_GetDirectBufferCapacity,
3766
3767 // New 1_6 features
3768
3769 jni_GetObjectRefType,
3770
3771 // Module features
3772
3773 jni_GetModule,
3774 jni_AddModuleReads,
3775 jni_CanReadModule
3776 };
3777
3778
3779 // For jvmti use to modify jni function table.
3780 // Java threads in native contiues to run until it is transitioned
3781 // to VM at safepoint. Before the transition or before it is blocked
3782 // for safepoint it may access jni function table. VM could crash if
3783 // any java thread access the jni function table in the middle of memcpy.
3784 // To avoid this each function pointers are copied automically.
3785 void copy_jni_function_table(const struct JNINativeInterface_ *new_jni_NativeInterface) {
3786 assert(SafepointSynchronize::is_at_safepoint(), "must be at safepoint");
3787 intptr_t *a = (intptr_t *) jni_functions();
3788 intptr_t *b = (intptr_t *) new_jni_NativeInterface;
3789 for (uint i=0; i < sizeof(struct JNINativeInterface_)/sizeof(void *); i++) {
3790 Atomic::store_ptr(*b++, a++);
3791 }
3792 }
3793
3794 void quicken_jni_functions() {
3795 // Replace Get<Primitive>Field with fast versions
3796 if (UseFastJNIAccessors && !JvmtiExport::can_post_field_access()
3797 && !VerifyJNIFields && !CountJNICalls && !CheckJNICalls
3798 #if defined(_WINDOWS) && defined(IA32) && defined(COMPILER2)
3799 // windows x86 currently needs SEH wrapper and the gain of the fast
3800 // versions currently isn't certain for server vm on uniprocessor.
3801 && os::is_MP()
3802 #endif
3803 ) {
3804 address func;
3805 func = JNI_FastGetField::generate_fast_get_boolean_field();
3806 if (func != (address)-1) {
3807 jni_NativeInterface.GetBooleanField = (GetBooleanField_t)func;
3808 }
3809 func = JNI_FastGetField::generate_fast_get_byte_field();
3810 if (func != (address)-1) {
3811 jni_NativeInterface.GetByteField = (GetByteField_t)func;
3812 }
3813 func = JNI_FastGetField::generate_fast_get_char_field();
3814 if (func != (address)-1) {
3815 jni_NativeInterface.GetCharField = (GetCharField_t)func;
3816 }
3817 func = JNI_FastGetField::generate_fast_get_short_field();
3818 if (func != (address)-1) {
3819 jni_NativeInterface.GetShortField = (GetShortField_t)func;
3820 }
3821 func = JNI_FastGetField::generate_fast_get_int_field();
3822 if (func != (address)-1) {
3823 jni_NativeInterface.GetIntField = (GetIntField_t)func;
3824 }
3825 func = JNI_FastGetField::generate_fast_get_long_field();
3826 if (func != (address)-1) {
3827 jni_NativeInterface.GetLongField = (GetLongField_t)func;
3828 }
3829 func = JNI_FastGetField::generate_fast_get_float_field();
3830 if (func != (address)-1) {
3831 jni_NativeInterface.GetFloatField = (GetFloatField_t)func;
3832 }
3833 func = JNI_FastGetField::generate_fast_get_double_field();
3834 if (func != (address)-1) {
3835 jni_NativeInterface.GetDoubleField = (GetDoubleField_t)func;
3836 }
3837 }
3838 }
3839
3840 // Returns the function structure
3841 struct JNINativeInterface_* jni_functions() {
3842 #if INCLUDE_JNI_CHECK
3843 if (CheckJNICalls) return jni_functions_check();
3844 #endif // INCLUDE_JNI_CHECK
3845 return &jni_NativeInterface;
3846 }
3847
3848 // Returns the function structure
3849 struct JNINativeInterface_* jni_functions_nocheck() {
3850 return &jni_NativeInterface;
3851 }
3852
3853
3854 // Invocation API
3855
3856
3857 // Forward declaration
3858 extern const struct JNIInvokeInterface_ jni_InvokeInterface;
3859
3860 // Global invocation API vars
3861 volatile jint vm_created = 0;
3862 // Indicate whether it is safe to recreate VM
3863 volatile jint safe_to_recreate_vm = 1;
3864 struct JavaVM_ main_vm = {&jni_InvokeInterface};
3865
3866
3867 #define JAVASTACKSIZE (400 * 1024) /* Default size of a thread java stack */
3868 enum { VERIFY_NONE, VERIFY_REMOTE, VERIFY_ALL };
3869
3870 DT_RETURN_MARK_DECL(GetDefaultJavaVMInitArgs, jint
3871 , HOTSPOT_JNI_GETDEFAULTJAVAVMINITARGS_RETURN(_ret_ref));
3872
3873 _JNI_IMPORT_OR_EXPORT_ jint JNICALL JNI_GetDefaultJavaVMInitArgs(void *args_) {
3874 HOTSPOT_JNI_GETDEFAULTJAVAVMINITARGS_ENTRY(args_);
3875 JDK1_1InitArgs *args = (JDK1_1InitArgs *)args_;
3876 jint ret = JNI_ERR;
3877 DT_RETURN_MARK(GetDefaultJavaVMInitArgs, jint, (const jint&)ret);
3878
3879 if (Threads::is_supported_jni_version(args->version)) {
3880 ret = JNI_OK;
3881 }
3882 // 1.1 style no longer supported in hotspot.
3883 // According the JNI spec, we should update args->version on return.
3884 // We also use the structure to communicate with launcher about default
3885 // stack size.
3886 if (args->version == JNI_VERSION_1_1) {
3887 args->version = JNI_VERSION_1_2;
3888 // javaStackSize is int in arguments structure
3889 assert(jlong(ThreadStackSize) * K < INT_MAX, "integer overflow");
3890 args->javaStackSize = (jint)(ThreadStackSize * K);
3891 }
3892 return ret;
3893 }
3894
3895 DT_RETURN_MARK_DECL(CreateJavaVM, jint
3896 , HOTSPOT_JNI_CREATEJAVAVM_RETURN(_ret_ref));
3897
3898 static jint JNI_CreateJavaVM_inner(JavaVM **vm, void **penv, void *args) {
3899 HOTSPOT_JNI_CREATEJAVAVM_ENTRY((void **) vm, penv, args);
3900
3901 jint result = JNI_ERR;
3902 DT_RETURN_MARK(CreateJavaVM, jint, (const jint&)result);
3903
3904 // We're about to use Atomic::xchg for synchronization. Some Zero
3905 // platforms use the GCC builtin __sync_lock_test_and_set for this,
3906 // but __sync_lock_test_and_set is not guaranteed to do what we want
3907 // on all architectures. So we check it works before relying on it.
3908 #if defined(ZERO) && defined(ASSERT)
3909 {
3910 jint a = 0xcafebabe;
3911 jint b = Atomic::xchg(0xdeadbeef, &a);
3912 void *c = &a;
3913 void *d = Atomic::xchg_ptr(&b, &c);
3914 assert(a == (jint) 0xdeadbeef && b == (jint) 0xcafebabe, "Atomic::xchg() works");
3915 assert(c == &b && d == &a, "Atomic::xchg_ptr() works");
3916 }
3917 #endif // ZERO && ASSERT
3918
3919 // At the moment it's only possible to have one Java VM,
3920 // since some of the runtime state is in global variables.
3921
3922 // We cannot use our mutex locks here, since they only work on
3923 // Threads. We do an atomic compare and exchange to ensure only
3924 // one thread can call this method at a time
3925
3926 // We use Atomic::xchg rather than Atomic::add/dec since on some platforms
3927 // the add/dec implementations are dependent on whether we are running
3928 // on a multiprocessor, and at this stage of initialization the os::is_MP
3929 // function used to determine this will always return false. Atomic::xchg
3930 // does not have this problem.
3931 if (Atomic::xchg(1, &vm_created) == 1) {
3932 return JNI_EEXIST; // already created, or create attempt in progress
3933 }
3934 if (Atomic::xchg(0, &safe_to_recreate_vm) == 0) {
3935 return JNI_ERR; // someone tried and failed and retry not allowed.
3936 }
3937
3938 assert(vm_created == 1, "vm_created is true during the creation");
3939
3940 /**
3941 * Certain errors during initialization are recoverable and do not
3942 * prevent this method from being called again at a later time
3943 * (perhaps with different arguments). However, at a certain
3944 * point during initialization if an error occurs we cannot allow
3945 * this function to be called again (or it will crash). In those
3946 * situations, the 'canTryAgain' flag is set to false, which atomically
3947 * sets safe_to_recreate_vm to 1, such that any new call to
3948 * JNI_CreateJavaVM will immediately fail using the above logic.
3949 */
3950 bool can_try_again = true;
3951
3952 result = Threads::create_vm((JavaVMInitArgs*) args, &can_try_again);
3953 if (result == JNI_OK) {
3954 JavaThread *thread = JavaThread::current();
3955 assert(!thread->has_pending_exception(), "should have returned not OK");
3956 /* thread is thread_in_vm here */
3957 *vm = (JavaVM *)(&main_vm);
3958 *(JNIEnv**)penv = thread->jni_environment();
3959
3960 #if INCLUDE_JVMCI
3961 if (EnableJVMCI) {
3962 if (UseJVMCICompiler) {
3963 // JVMCI is initialized on a CompilerThread
3964 if (BootstrapJVMCI) {
3965 JavaThread* THREAD = thread;
3966 JVMCICompiler* compiler = JVMCICompiler::instance(CATCH);
3967 compiler->bootstrap();
3968 }
3969 }
3970 }
3971 #endif
3972
3973 // Tracks the time application was running before GC
3974 RuntimeService::record_application_start();
3975
3976 // Notify JVMTI
3977 if (JvmtiExport::should_post_thread_life()) {
3978 JvmtiExport::post_thread_start(thread);
3979 }
3980
3981 EventThreadStart event;
3982 if (event.should_commit()) {
3983 event.set_thread(THREAD_TRACE_ID(thread));
3984 event.commit();
3985 }
3986
3987 #ifndef PRODUCT
3988 // Check if we should compile all classes on bootclasspath
3989 if (CompileTheWorld) ClassLoader::compile_the_world();
3990 if (ReplayCompiles) ciReplay::replay(thread);
3991
3992 // Some platforms (like Win*) need a wrapper around these test
3993 // functions in order to properly handle error conditions.
3994 test_error_handler();
3995 if (ExecuteInternalVMTests) {
3996 InternalVMTests::run();
3997 }
3998 #endif
3999
4000 // Since this is not a JVM_ENTRY we have to set the thread state manually before leaving.
4001 ThreadStateTransition::transition_and_fence(thread, _thread_in_vm, _thread_in_native);
4002 } else {
4003 // If create_vm exits because of a pending exception, exit with that
4004 // exception. In the future when we figure out how to reclaim memory,
4005 // we may be able to exit with JNI_ERR and allow the calling application
4006 // to continue.
4007 if (Universe::is_fully_initialized()) {
4008 // otherwise no pending exception possible - VM will already have aborted
4009 JavaThread* THREAD = JavaThread::current();
4010 if (HAS_PENDING_EXCEPTION) {
4011 HandleMark hm;
4012 vm_exit_during_initialization(Handle(THREAD, PENDING_EXCEPTION));
4013 }
4014 }
4015
4016 if (can_try_again) {
4017 // reset safe_to_recreate_vm to 1 so that retrial would be possible
4018 safe_to_recreate_vm = 1;
4019 }
4020
4021 // Creation failed. We must reset vm_created
4022 *vm = 0;
4023 *(JNIEnv**)penv = 0;
4024 // reset vm_created last to avoid race condition. Use OrderAccess to
4025 // control both compiler and architectural-based reordering.
4026 OrderAccess::release_store(&vm_created, 0);
4027 }
4028
4029 // Flush stdout and stderr before exit.
4030 fflush(stdout);
4031 fflush(stderr);
4032
4033 return result;
4034
4035 }
4036
4037 _JNI_IMPORT_OR_EXPORT_ jint JNICALL JNI_CreateJavaVM(JavaVM **vm, void **penv, void *args) {
4038 jint result = 0;
4039 // On Windows, let CreateJavaVM run with SEH protection
4040 #ifdef _WIN32
4041 __try {
4042 #endif
4043 result = JNI_CreateJavaVM_inner(vm, penv, args);
4044 #ifdef _WIN32
4045 } __except(topLevelExceptionFilter((_EXCEPTION_POINTERS*)_exception_info())) {
4046 // Nothing to do.
4047 }
4048 #endif
4049 return result;
4050 }
4051
4052 _JNI_IMPORT_OR_EXPORT_ jint JNICALL JNI_GetCreatedJavaVMs(JavaVM **vm_buf, jsize bufLen, jsize *numVMs) {
4053 // See bug 4367188, the wrapper can sometimes cause VM crashes
4054 // JNIWrapper("GetCreatedJavaVMs");
4055
4056 HOTSPOT_JNI_GETCREATEDJAVAVMS_ENTRY((void **) vm_buf, bufLen, (uintptr_t *) numVMs);
4057
4058 if (vm_created) {
4059 if (numVMs != NULL) *numVMs = 1;
4060 if (bufLen > 0) *vm_buf = (JavaVM *)(&main_vm);
4061 } else {
4062 if (numVMs != NULL) *numVMs = 0;
4063 }
4064 HOTSPOT_JNI_GETCREATEDJAVAVMS_RETURN(JNI_OK);
4065 return JNI_OK;
4066 }
4067
4068 extern "C" {
4069
4070 DT_RETURN_MARK_DECL(DestroyJavaVM, jint
4071 , HOTSPOT_JNI_DESTROYJAVAVM_RETURN(_ret_ref));
4072
4073 jint JNICALL jni_DestroyJavaVM(JavaVM *vm) {
4074 HOTSPOT_JNI_DESTROYJAVAVM_ENTRY(vm);
4075 jint res = JNI_ERR;
4076 DT_RETURN_MARK(DestroyJavaVM, jint, (const jint&)res);
4077
4078 if (!vm_created) {
4079 res = JNI_ERR;
4080 return res;
4081 }
4082
4083 JNIWrapper("DestroyJavaVM");
4084 JNIEnv *env;
4085 JavaVMAttachArgs destroyargs;
4086 destroyargs.version = CurrentVersion;
4087 destroyargs.name = (char *)"DestroyJavaVM";
4088 destroyargs.group = NULL;
4089 res = vm->AttachCurrentThread((void **)&env, (void *)&destroyargs);
4090 if (res != JNI_OK) {
4091 return res;
4092 }
4093
4094 // Since this is not a JVM_ENTRY we have to set the thread state manually before entering.
4095 JavaThread* thread = JavaThread::current();
4096 ThreadStateTransition::transition_from_native(thread, _thread_in_vm);
4097 if (Threads::destroy_vm()) {
4098 // Should not change thread state, VM is gone
4099 vm_created = false;
4100 res = JNI_OK;
4101 return res;
4102 } else {
4103 ThreadStateTransition::transition_and_fence(thread, _thread_in_vm, _thread_in_native);
4104 res = JNI_ERR;
4105 return res;
4106 }
4107 }
4108
4109
4110 static jint attach_current_thread(JavaVM *vm, void **penv, void *_args, bool daemon) {
4111 JavaVMAttachArgs *args = (JavaVMAttachArgs *) _args;
4112
4113 // Check below commented out from JDK1.2fcs as well
4114 /*
4115 if (args && (args->version != JNI_VERSION_1_1 || args->version != JNI_VERSION_1_2)) {
4116 return JNI_EVERSION;
4117 }
4118 */
4119
4120 Thread* t = Thread::current_or_null();
4121 if (t != NULL) {
4122 // If the thread has been attached this operation is a no-op
4123 *(JNIEnv**)penv = ((JavaThread*) t)->jni_environment();
4124 return JNI_OK;
4125 }
4126
4127 // Create a thread and mark it as attaching so it will be skipped by the
4128 // ThreadsListEnumerator - see CR 6404306
4129 JavaThread* thread = new JavaThread(true);
4130
4131 // Set correct safepoint info. The thread is going to call into Java when
4132 // initializing the Java level thread object. Hence, the correct state must
4133 // be set in order for the Safepoint code to deal with it correctly.
4134 thread->set_thread_state(_thread_in_vm);
4135 thread->record_stack_base_and_size();
4136 thread->initialize_thread_current();
4137
4138 if (!os::create_attached_thread(thread)) {
4139 delete thread;
4140 return JNI_ERR;
4141 }
4142 // Enable stack overflow checks
4143 thread->create_stack_guard_pages();
4144
4145 thread->initialize_tlab();
4146
4147 thread->cache_global_variables();
4148
4149 // Crucial that we do not have a safepoint check for this thread, since it has
4150 // not been added to the Thread list yet.
4151 { Threads_lock->lock_without_safepoint_check();
4152 // This must be inside this lock in order to get FullGCALot to work properly, i.e., to
4153 // avoid this thread trying to do a GC before it is added to the thread-list
4154 thread->set_active_handles(JNIHandleBlock::allocate_block());
4155 Threads::add(thread, daemon);
4156 Threads_lock->unlock();
4157 }
4158 // Create thread group and name info from attach arguments
4159 oop group = NULL;
4160 char* thread_name = NULL;
4161 if (args != NULL && Threads::is_supported_jni_version(args->version)) {
4162 group = JNIHandles::resolve(args->group);
4163 thread_name = args->name; // may be NULL
4164 }
4165 if (group == NULL) group = Universe::main_thread_group();
4166
4167 // Create Java level thread object and attach it to this thread
4168 bool attach_failed = false;
4169 {
4170 EXCEPTION_MARK;
4171 HandleMark hm(THREAD);
4172 Handle thread_group(THREAD, group);
4173 thread->allocate_threadObj(thread_group, thread_name, daemon, THREAD);
4174 if (HAS_PENDING_EXCEPTION) {
4175 CLEAR_PENDING_EXCEPTION;
4176 // cleanup outside the handle mark.
4177 attach_failed = true;
4178 }
4179 }
4180
4181 if (attach_failed) {
4182 // Added missing cleanup
4183 thread->cleanup_failed_attach_current_thread();
4184 return JNI_ERR;
4185 }
4186
4187 // mark the thread as no longer attaching
4188 // this uses a fence to push the change through so we don't have
4189 // to regrab the threads_lock
4190 thread->set_done_attaching_via_jni();
4191
4192 // Set java thread status.
4193 java_lang_Thread::set_thread_status(thread->threadObj(),
4194 java_lang_Thread::RUNNABLE);
4195
4196 // Notify the debugger
4197 if (JvmtiExport::should_post_thread_life()) {
4198 JvmtiExport::post_thread_start(thread);
4199 }
4200
4201 EventThreadStart event;
4202 if (event.should_commit()) {
4203 event.set_thread(THREAD_TRACE_ID(thread));
4204 event.commit();
4205 }
4206
4207 *(JNIEnv**)penv = thread->jni_environment();
4208
4209 // Now leaving the VM, so change thread_state. This is normally automatically taken care
4210 // of in the JVM_ENTRY. But in this situation we have to do it manually. Notice, that by
4211 // using ThreadStateTransition::transition, we do a callback to the safepoint code if
4212 // needed.
4213
4214 ThreadStateTransition::transition_and_fence(thread, _thread_in_vm, _thread_in_native);
4215
4216 // Perform any platform dependent FPU setup
4217 os::setup_fpu();
4218
4219 return JNI_OK;
4220 }
4221
4222
4223 jint JNICALL jni_AttachCurrentThread(JavaVM *vm, void **penv, void *_args) {
4224 HOTSPOT_JNI_ATTACHCURRENTTHREAD_ENTRY(vm, penv, _args);
4225 if (!vm_created) {
4226 HOTSPOT_JNI_ATTACHCURRENTTHREAD_RETURN((uint32_t) JNI_ERR);
4227 return JNI_ERR;
4228 }
4229
4230 JNIWrapper("AttachCurrentThread");
4231 jint ret = attach_current_thread(vm, penv, _args, false);
4232 HOTSPOT_JNI_ATTACHCURRENTTHREAD_RETURN(ret);
4233 return ret;
4234 }
4235
4236
4237 jint JNICALL jni_DetachCurrentThread(JavaVM *vm) {
4238 HOTSPOT_JNI_DETACHCURRENTTHREAD_ENTRY(vm);
4239 VM_Exit::block_if_vm_exited();
4240
4241 JNIWrapper("DetachCurrentThread");
4242
4243 // If the thread has already been detached the operation is a no-op
4244 if (Thread::current_or_null() == NULL) {
4245 HOTSPOT_JNI_DETACHCURRENTTHREAD_RETURN(JNI_OK);
4246 return JNI_OK;
4247 }
4248
4249 JavaThread* thread = JavaThread::current();
4250 if (thread->has_last_Java_frame()) {
4251 HOTSPOT_JNI_DETACHCURRENTTHREAD_RETURN((uint32_t) JNI_ERR);
4252 // Can't detach a thread that's running java, that can't work.
4253 return JNI_ERR;
4254 }
4255
4256 // Safepoint support. Have to do call-back to safepoint code, if in the
4257 // middel of a safepoint operation
4258 ThreadStateTransition::transition_from_native(thread, _thread_in_vm);
4259
4260 // XXX: Note that JavaThread::exit() call below removes the guards on the
4261 // stack pages set up via enable_stack_{red,yellow}_zone() calls
4262 // above in jni_AttachCurrentThread. Unfortunately, while the setting
4263 // of the guards is visible in jni_AttachCurrentThread above,
4264 // the removal of the guards is buried below in JavaThread::exit()
4265 // here. The abstraction should be more symmetrically either exposed
4266 // or hidden (e.g. it could probably be hidden in the same
4267 // (platform-dependent) methods where we do alternate stack
4268 // maintenance work?)
4269 thread->exit(false, JavaThread::jni_detach);
4270 delete thread;
4271
4272 HOTSPOT_JNI_DETACHCURRENTTHREAD_RETURN(JNI_OK);
4273 return JNI_OK;
4274 }
4275
4276 DT_RETURN_MARK_DECL(GetEnv, jint
4277 , HOTSPOT_JNI_GETENV_RETURN(_ret_ref));
4278
4279 jint JNICALL jni_GetEnv(JavaVM *vm, void **penv, jint version) {
4280 HOTSPOT_JNI_GETENV_ENTRY(vm, penv, version);
4281 jint ret = JNI_ERR;
4282 DT_RETURN_MARK(GetEnv, jint, (const jint&)ret);
4283
4284 if (!vm_created) {
4285 *penv = NULL;
4286 ret = JNI_EDETACHED;
4287 return ret;
4288 }
4289
4290 if (JniExportedInterface::GetExportedInterface(vm, penv, version, &ret)) {
4291 return ret;
4292 }
4293
4294 #ifndef JVMPI_VERSION_1
4295 // need these in order to be polite about older agents
4296 #define JVMPI_VERSION_1 ((jint)0x10000001)
4297 #define JVMPI_VERSION_1_1 ((jint)0x10000002)
4298 #define JVMPI_VERSION_1_2 ((jint)0x10000003)
4299 #endif // !JVMPI_VERSION_1
4300
4301 Thread* thread = Thread::current_or_null();
4302 if (thread != NULL && thread->is_Java_thread()) {
4303 if (Threads::is_supported_jni_version_including_1_1(version)) {
4304 *(JNIEnv**)penv = ((JavaThread*) thread)->jni_environment();
4305 ret = JNI_OK;
4306 return ret;
4307
4308 } else if (version == JVMPI_VERSION_1 ||
4309 version == JVMPI_VERSION_1_1 ||
4310 version == JVMPI_VERSION_1_2) {
4311 tty->print_cr("ERROR: JVMPI, an experimental interface, is no longer supported.");
4312 tty->print_cr("Please use the supported interface: the JVM Tool Interface (JVM TI).");
4313 ret = JNI_EVERSION;
4314 return ret;
4315 } else if (JvmtiExport::is_jvmdi_version(version)) {
4316 tty->print_cr("FATAL ERROR: JVMDI is no longer supported.");
4317 tty->print_cr("Please use the supported interface: the JVM Tool Interface (JVM TI).");
4318 ret = JNI_EVERSION;
4319 return ret;
4320 } else {
4321 *penv = NULL;
4322 ret = JNI_EVERSION;
4323 return ret;
4324 }
4325 } else {
4326 *penv = NULL;
4327 ret = JNI_EDETACHED;
4328 return ret;
4329 }
4330 }
4331
4332
4333 jint JNICALL jni_AttachCurrentThreadAsDaemon(JavaVM *vm, void **penv, void *_args) {
4334 HOTSPOT_JNI_ATTACHCURRENTTHREADASDAEMON_ENTRY(vm, penv, _args);
4335 if (!vm_created) {
4336 HOTSPOT_JNI_ATTACHCURRENTTHREADASDAEMON_RETURN((uint32_t) JNI_ERR);
4337 return JNI_ERR;
4338 }
4339
4340 JNIWrapper("AttachCurrentThreadAsDaemon");
4341 jint ret = attach_current_thread(vm, penv, _args, true);
4342 HOTSPOT_JNI_ATTACHCURRENTTHREADASDAEMON_RETURN(ret);
4343 return ret;
4344 }
4345
4346
4347 } // End extern "C"
4348
4349 const struct JNIInvokeInterface_ jni_InvokeInterface = {
4350 NULL,
4351 NULL,
4352 NULL,
4353
4354 jni_DestroyJavaVM,
4355 jni_AttachCurrentThread,
4356 jni_DetachCurrentThread,
4357 jni_GetEnv,
4358 jni_AttachCurrentThreadAsDaemon
4359 };