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.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/g1/g1SATBCardTableModRefBS.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 // Choose DT_RETURN_MARK macros based on the type: float/double -> void
167 // (dtrace doesn't do FP yet)
168 #define DT_RETURN_MARK_DECL_FOR(TypeName, name, type, probe) \
169 FP_SELECT(TypeName, \
170 DT_RETURN_MARK_DECL(name, type, probe), DT_VOID_RETURN_MARK_DECL(name, probe) )
171 #define DT_RETURN_MARK_FOR(TypeName, name, type, ref) \
172 FP_SELECT(TypeName, \
173 DT_RETURN_MARK(name, type, ref), DT_VOID_RETURN_MARK(name) )
174
175
176 // out-of-line helpers for class jfieldIDWorkaround:
177
178 bool jfieldIDWorkaround::is_valid_jfieldID(Klass* k, jfieldID id) {
179 if (jfieldIDWorkaround::is_instance_jfieldID(k, id)) {
180 uintptr_t as_uint = (uintptr_t) id;
181 intptr_t offset = raw_instance_offset(id);
182 if (is_checked_jfieldID(id)) {
183 if (!klass_hash_ok(k, id)) {
184 return false;
185 }
186 }
187 return InstanceKlass::cast(k)->contains_field_offset(offset);
188 } else {
189 JNIid* result = (JNIid*) id;
190 #ifdef ASSERT
191 return result != NULL && result->is_static_field_id();
192 #else
193 return result != NULL;
194 #endif
195 }
196 }
197
198
199 intptr_t jfieldIDWorkaround::encode_klass_hash(Klass* k, intptr_t offset) {
200 if (offset <= small_offset_mask) {
201 Klass* field_klass = k;
202 Klass* super_klass = field_klass->super();
203 // With compressed oops the most super class with nonstatic fields would
204 // be the owner of fields embedded in the header.
205 while (InstanceKlass::cast(super_klass)->has_nonstatic_fields() &&
206 InstanceKlass::cast(super_klass)->contains_field_offset(offset)) {
207 field_klass = super_klass; // super contains the field also
208 super_klass = field_klass->super();
209 }
210 debug_only(NoSafepointVerifier nosafepoint;)
211 uintptr_t klass_hash = field_klass->identity_hash();
212 return ((klass_hash & klass_mask) << klass_shift) | checked_mask_in_place;
213 } else {
214 #if 0
215 #ifndef PRODUCT
216 {
217 ResourceMark rm;
218 warning("VerifyJNIFields: long offset %d in %s", offset, k->external_name());
219 }
220 #endif
221 #endif
222 return 0;
223 }
224 }
225
226 bool jfieldIDWorkaround::klass_hash_ok(Klass* k, jfieldID id) {
227 uintptr_t as_uint = (uintptr_t) id;
228 intptr_t klass_hash = (as_uint >> klass_shift) & klass_mask;
229 do {
230 debug_only(NoSafepointVerifier nosafepoint;)
231 // Could use a non-blocking query for identity_hash here...
232 if ((k->identity_hash() & klass_mask) == klass_hash)
233 return true;
234 k = k->super();
235 } while (k != NULL);
236 return false;
237 }
238
239 void jfieldIDWorkaround::verify_instance_jfieldID(Klass* k, jfieldID id) {
240 guarantee(jfieldIDWorkaround::is_instance_jfieldID(k, id), "must be an instance field" );
241 uintptr_t as_uint = (uintptr_t) id;
242 intptr_t offset = raw_instance_offset(id);
243 if (VerifyJNIFields) {
244 if (is_checked_jfieldID(id)) {
245 guarantee(klass_hash_ok(k, id),
246 "Bug in native code: jfieldID class must match object");
247 } else {
248 #if 0
249 #ifndef PRODUCT
250 if (Verbose) {
251 ResourceMark rm;
252 warning("VerifyJNIFields: unverified offset %d for %s", offset, k->external_name());
253 }
254 #endif
255 #endif
256 }
257 }
258 guarantee(InstanceKlass::cast(k)->contains_field_offset(offset),
259 "Bug in native code: jfieldID offset must address interior of object");
260 }
261
262 // Wrapper to trace JNI functions
263
264 #ifdef ASSERT
265 Histogram* JNIHistogram;
266 static volatile jint JNIHistogram_lock = 0;
267
268 class JNIHistogramElement : public HistogramElement {
269 public:
270 JNIHistogramElement(const char* name);
271 };
272
273 JNIHistogramElement::JNIHistogramElement(const char* elementName) {
274 _name = elementName;
275 uintx count = 0;
276
277 while (Atomic::cmpxchg(1, &JNIHistogram_lock, 0) != 0) {
278 while (OrderAccess::load_acquire(&JNIHistogram_lock) != 0) {
279 count +=1;
280 if ( (WarnOnStalledSpinLock > 0)
281 && (count % WarnOnStalledSpinLock == 0)) {
282 warning("JNIHistogram_lock seems to be stalled");
283 }
284 }
285 }
286
287
288 if(JNIHistogram == NULL)
289 JNIHistogram = new Histogram("JNI Call Counts",100);
290
291 JNIHistogram->add_element(this);
292 Atomic::dec(&JNIHistogram_lock);
293 }
294
295 #define JNICountWrapper(arg) \
296 static JNIHistogramElement* e = new JNIHistogramElement(arg); \
297 /* There is a MT-race condition in VC++. So we need to make sure that that e has been initialized */ \
298 if (e != NULL) e->increment_count()
299 #define JNIWrapper(arg) JNICountWrapper(arg);
300 #else
301 #define JNIWrapper(arg)
302 #endif
303
304
305 // Implementation of JNI entries
306
307 DT_RETURN_MARK_DECL(DefineClass, jclass
308 , HOTSPOT_JNI_DEFINECLASS_RETURN(_ret_ref));
309
310 JNI_ENTRY(jclass, jni_DefineClass(JNIEnv *env, const char *name, jobject loaderRef,
311 const jbyte *buf, jsize bufLen))
312 JNIWrapper("DefineClass");
313
314 HOTSPOT_JNI_DEFINECLASS_ENTRY(
315 env, (char*) name, loaderRef, (char*) buf, bufLen);
316
317 jclass cls = NULL;
318 DT_RETURN_MARK(DefineClass, jclass, (const jclass&)cls);
319
320 TempNewSymbol class_name = NULL;
321 // Since exceptions can be thrown, class initialization can take place
322 // if name is NULL no check for class name in .class stream has to be made.
323 if (name != NULL) {
324 const int str_len = (int)strlen(name);
325 if (str_len > Symbol::max_length()) {
326 // It's impossible to create this class; the name cannot fit
327 // into the constant pool.
328 THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), name);
329 }
330 class_name = SymbolTable::new_symbol(name, CHECK_NULL);
331 }
332 ResourceMark rm(THREAD);
333 ClassFileStream st((u1*)buf, bufLen, NULL, ClassFileStream::verify);
334 Handle class_loader (THREAD, JNIHandles::resolve(loaderRef));
335
336 if (UsePerfData && !class_loader.is_null()) {
337 // check whether the current caller thread holds the lock or not.
338 // If not, increment the corresponding counter
339 if (ObjectSynchronizer::
340 query_lock_ownership((JavaThread*)THREAD, class_loader) !=
341 ObjectSynchronizer::owner_self) {
342 ClassLoader::sync_JNIDefineClassLockFreeCounter()->inc();
343 }
344 }
345 Klass* k = SystemDictionary::resolve_from_stream(class_name,
346 class_loader,
347 Handle(),
348 &st,
349 CHECK_NULL);
350
351 if (log_is_enabled(Debug, class, resolve) && k != NULL) {
352 trace_class_resolution(k);
353 }
354
355 cls = (jclass)JNIHandles::make_local(
356 env, k->java_mirror());
357 return cls;
358 JNI_END
359
360
361
362 static bool first_time_FindClass = true;
363
364 DT_RETURN_MARK_DECL(FindClass, jclass
365 , HOTSPOT_JNI_FINDCLASS_RETURN(_ret_ref));
366
367 JNI_ENTRY(jclass, jni_FindClass(JNIEnv *env, const char *name))
368 JNIWrapper("FindClass");
369
370 HOTSPOT_JNI_FINDCLASS_ENTRY(env, (char *)name);
371
372 jclass result = NULL;
373 DT_RETURN_MARK(FindClass, jclass, (const jclass&)result);
374
375 // Remember if we are the first invocation of jni_FindClass
376 bool first_time = first_time_FindClass;
377 first_time_FindClass = false;
378
379 // Sanity check the name: it cannot be null or larger than the maximum size
380 // name we can fit in the constant pool.
381 if (name == NULL || (int)strlen(name) > Symbol::max_length()) {
382 THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), name);
383 }
384
385 //%note jni_3
386 Handle loader;
387 Handle protection_domain;
388 // Find calling class
389 instanceKlassHandle k (THREAD, thread->security_get_caller_class(0));
390 if (k.not_null()) {
391 loader = Handle(THREAD, k->class_loader());
392 // Special handling to make sure JNI_OnLoad and JNI_OnUnload are executed
393 // in the correct class context.
394 if (loader.is_null() &&
395 k->name() == vmSymbols::java_lang_ClassLoader_NativeLibrary()) {
396 JavaValue result(T_OBJECT);
397 JavaCalls::call_static(&result, k,
398 vmSymbols::getFromClass_name(),
399 vmSymbols::void_class_signature(),
400 thread);
401 if (HAS_PENDING_EXCEPTION) {
402 Handle ex(thread, thread->pending_exception());
403 CLEAR_PENDING_EXCEPTION;
404 THROW_HANDLE_0(ex);
405 }
406 oop mirror = (oop) result.get_jobject();
407 loader = Handle(THREAD,
408 InstanceKlass::cast(java_lang_Class::as_Klass(mirror))->class_loader());
409 protection_domain = Handle(THREAD,
410 InstanceKlass::cast(java_lang_Class::as_Klass(mirror))->protection_domain());
411 }
412 } else {
413 // We call ClassLoader.getSystemClassLoader to obtain the system class loader.
414 loader = Handle(THREAD, SystemDictionary::java_system_loader());
415 }
416
417 TempNewSymbol sym = SymbolTable::new_symbol(name, CHECK_NULL);
418 result = find_class_from_class_loader(env, sym, true, loader,
419 protection_domain, true, thread);
420
421 if (log_is_enabled(Debug, class, resolve) && result != NULL) {
422 trace_class_resolution(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(result)));
423 }
424
425 // If we were the first invocation of jni_FindClass, we enable compilation again
426 // rather than just allowing invocation counter to overflow and decay.
427 // Controlled by flag DelayCompilationDuringStartup.
428 if (first_time && !CompileTheWorld)
429 CompilationPolicy::completed_vm_startup();
430
431 return result;
432 JNI_END
433
434 DT_RETURN_MARK_DECL(FromReflectedMethod, jmethodID
435 , HOTSPOT_JNI_FROMREFLECTEDMETHOD_RETURN((uintptr_t)_ret_ref));
436
437 JNI_ENTRY(jmethodID, jni_FromReflectedMethod(JNIEnv *env, jobject method))
438 JNIWrapper("FromReflectedMethod");
439
440 HOTSPOT_JNI_FROMREFLECTEDMETHOD_ENTRY(env, method);
441
442 jmethodID ret = NULL;
443 DT_RETURN_MARK(FromReflectedMethod, jmethodID, (const jmethodID&)ret);
444
445 // method is a handle to a java.lang.reflect.Method object
446 oop reflected = JNIHandles::resolve_non_null(method);
447 oop mirror = NULL;
448 int slot = 0;
449
450 if (reflected->klass() == SystemDictionary::reflect_Constructor_klass()) {
451 mirror = java_lang_reflect_Constructor::clazz(reflected);
452 slot = java_lang_reflect_Constructor::slot(reflected);
453 } else {
454 assert(reflected->klass() == SystemDictionary::reflect_Method_klass(), "wrong type");
455 mirror = java_lang_reflect_Method::clazz(reflected);
456 slot = java_lang_reflect_Method::slot(reflected);
457 }
458 Klass* k = java_lang_Class::as_Klass(mirror);
459
460 KlassHandle k1(THREAD, k);
461 // Make sure class is initialized before handing id's out to methods
462 k1()->initialize(CHECK_NULL);
463 Method* m = InstanceKlass::cast(k1())->method_with_idnum(slot);
464 ret = m==NULL? NULL : m->jmethod_id(); // return NULL if reflected method deleted
465 return ret;
466 JNI_END
467
468 DT_RETURN_MARK_DECL(FromReflectedField, jfieldID
469 , HOTSPOT_JNI_FROMREFLECTEDFIELD_RETURN((uintptr_t)_ret_ref));
470
471 JNI_ENTRY(jfieldID, jni_FromReflectedField(JNIEnv *env, jobject field))
472 JNIWrapper("FromReflectedField");
473
474 HOTSPOT_JNI_FROMREFLECTEDFIELD_ENTRY(env, field);
475
476 jfieldID ret = NULL;
477 DT_RETURN_MARK(FromReflectedField, jfieldID, (const jfieldID&)ret);
478
479 // field is a handle to a java.lang.reflect.Field object
480 oop reflected = JNIHandles::resolve_non_null(field);
481 oop mirror = java_lang_reflect_Field::clazz(reflected);
482 Klass* k = java_lang_Class::as_Klass(mirror);
483 int slot = java_lang_reflect_Field::slot(reflected);
484 int modifiers = java_lang_reflect_Field::modifiers(reflected);
485
486 KlassHandle k1(THREAD, k);
487 // Make sure class is initialized before handing id's out to fields
488 k1()->initialize(CHECK_NULL);
489
490 // First check if this is a static field
491 if (modifiers & JVM_ACC_STATIC) {
492 intptr_t offset = InstanceKlass::cast(k1())->field_offset( slot );
493 JNIid* id = InstanceKlass::cast(k1())->jni_id_for(offset);
494 assert(id != NULL, "corrupt Field object");
495 debug_only(id->set_is_static_field_id();)
496 // A jfieldID for a static field is a JNIid specifying the field holder and the offset within the Klass*
497 ret = jfieldIDWorkaround::to_static_jfieldID(id);
498 return ret;
499 }
500
501 // The slot is the index of the field description in the field-array
502 // The jfieldID is the offset of the field within the object
503 // It may also have hash bits for k, if VerifyJNIFields is turned on.
504 intptr_t offset = InstanceKlass::cast(k1())->field_offset( slot );
505 assert(InstanceKlass::cast(k1())->contains_field_offset(offset), "stay within object");
506 ret = jfieldIDWorkaround::to_instance_jfieldID(k1(), offset);
507 return ret;
508 JNI_END
509
510
511 DT_RETURN_MARK_DECL(ToReflectedMethod, jobject
512 , HOTSPOT_JNI_TOREFLECTEDMETHOD_RETURN(_ret_ref));
513
514 JNI_ENTRY(jobject, jni_ToReflectedMethod(JNIEnv *env, jclass cls, jmethodID method_id, jboolean isStatic))
515 JNIWrapper("ToReflectedMethod");
516
517 HOTSPOT_JNI_TOREFLECTEDMETHOD_ENTRY(env, cls, (uintptr_t) method_id, isStatic);
518
519 jobject ret = NULL;
520 DT_RETURN_MARK(ToReflectedMethod, jobject, (const jobject&)ret);
521
522 methodHandle m (THREAD, Method::resolve_jmethod_id(method_id));
523 assert(m->is_static() == (isStatic != 0), "jni_ToReflectedMethod access flags doesn't match");
524 oop reflection_method;
525 if (m->is_initializer()) {
526 reflection_method = Reflection::new_constructor(m, CHECK_NULL);
527 } else {
528 reflection_method = Reflection::new_method(m, false, CHECK_NULL);
529 }
530 ret = JNIHandles::make_local(env, reflection_method);
531 return ret;
532 JNI_END
533
534 DT_RETURN_MARK_DECL(GetSuperclass, jclass
535 , HOTSPOT_JNI_GETSUPERCLASS_RETURN(_ret_ref));
536
537 JNI_ENTRY(jclass, jni_GetSuperclass(JNIEnv *env, jclass sub))
538 JNIWrapper("GetSuperclass");
539
540 HOTSPOT_JNI_GETSUPERCLASS_ENTRY(env, sub);
541
542 jclass obj = NULL;
543 DT_RETURN_MARK(GetSuperclass, jclass, (const jclass&)obj);
544
545 oop mirror = JNIHandles::resolve_non_null(sub);
546 // primitive classes return NULL
547 if (java_lang_Class::is_primitive(mirror)) return NULL;
548
549 // Rules of Class.getSuperClass as implemented by KLass::java_super:
550 // arrays return Object
551 // interfaces return NULL
552 // proper classes return Klass::super()
553 Klass* k = java_lang_Class::as_Klass(mirror);
554 if (k->is_interface()) return NULL;
555
556 // return mirror for superclass
557 Klass* super = k->java_super();
558 // super2 is the value computed by the compiler's getSuperClass intrinsic:
559 debug_only(Klass* super2 = ( k->is_array_klass()
560 ? SystemDictionary::Object_klass()
561 : k->super() ) );
562 assert(super == super2,
563 "java_super computation depends on interface, array, other super");
564 obj = (super == NULL) ? NULL : (jclass) JNIHandles::make_local(super->java_mirror());
565 return obj;
566 JNI_END
567
568 JNI_QUICK_ENTRY(jboolean, jni_IsAssignableFrom(JNIEnv *env, jclass sub, jclass super))
569 JNIWrapper("IsSubclassOf");
570
571 HOTSPOT_JNI_ISASSIGNABLEFROM_ENTRY(env, sub, super);
572
573 oop sub_mirror = JNIHandles::resolve_non_null(sub);
574 oop super_mirror = JNIHandles::resolve_non_null(super);
575 if (java_lang_Class::is_primitive(sub_mirror) ||
576 java_lang_Class::is_primitive(super_mirror)) {
577 jboolean ret = (sub_mirror == super_mirror);
578
579 HOTSPOT_JNI_ISASSIGNABLEFROM_RETURN(ret);
580 return ret;
581 }
582 Klass* sub_klass = java_lang_Class::as_Klass(sub_mirror);
583 Klass* super_klass = java_lang_Class::as_Klass(super_mirror);
584 assert(sub_klass != NULL && super_klass != NULL, "invalid arguments to jni_IsAssignableFrom");
585 jboolean ret = sub_klass->is_subtype_of(super_klass) ?
586 JNI_TRUE : JNI_FALSE;
587
588 HOTSPOT_JNI_ISASSIGNABLEFROM_RETURN(ret);
589 return ret;
590 JNI_END
591
592
593 DT_RETURN_MARK_DECL(Throw, jint
594 , HOTSPOT_JNI_THROW_RETURN(_ret_ref));
595
596 JNI_ENTRY(jint, jni_Throw(JNIEnv *env, jthrowable obj))
597 JNIWrapper("Throw");
598
599 HOTSPOT_JNI_THROW_ENTRY(env, obj);
600
601 jint ret = JNI_OK;
602 DT_RETURN_MARK(Throw, jint, (const jint&)ret);
603
604 THROW_OOP_(JNIHandles::resolve(obj), JNI_OK);
605 ShouldNotReachHere();
606 return 0; // Mute compiler.
607 JNI_END
608
609
610 DT_RETURN_MARK_DECL(ThrowNew, jint
611 , HOTSPOT_JNI_THROWNEW_RETURN(_ret_ref));
612
613 JNI_ENTRY(jint, jni_ThrowNew(JNIEnv *env, jclass clazz, const char *message))
614 JNIWrapper("ThrowNew");
615
616 HOTSPOT_JNI_THROWNEW_ENTRY(env, clazz, (char *) message);
617
618 jint ret = JNI_OK;
619 DT_RETURN_MARK(ThrowNew, jint, (const jint&)ret);
620
621 InstanceKlass* k = InstanceKlass::cast(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz)));
622 Symbol* name = k->name();
623 Handle class_loader (THREAD, k->class_loader());
624 Handle protection_domain (THREAD, k->protection_domain());
625 THROW_MSG_LOADER_(name, (char *)message, class_loader, protection_domain, JNI_OK);
626 ShouldNotReachHere();
627 return 0; // Mute compiler.
628 JNI_END
629
630
631 // JNI functions only transform a pending async exception to a synchronous
632 // exception in ExceptionOccurred and ExceptionCheck calls, since
633 // delivering an async exception in other places won't change the native
634 // code's control flow and would be harmful when native code further calls
635 // JNI functions with a pending exception. Async exception is also checked
636 // during the call, so ExceptionOccurred/ExceptionCheck won't return
637 // false but deliver the async exception at the very end during
638 // state transition.
639
640 static void jni_check_async_exceptions(JavaThread *thread) {
641 assert(thread == Thread::current(), "must be itself");
642 thread->check_and_handle_async_exceptions();
643 }
644
645 JNI_ENTRY_NO_PRESERVE(jthrowable, jni_ExceptionOccurred(JNIEnv *env))
646 JNIWrapper("ExceptionOccurred");
647
648 HOTSPOT_JNI_EXCEPTIONOCCURRED_ENTRY(env);
649
650 jni_check_async_exceptions(thread);
651 oop exception = thread->pending_exception();
652 jthrowable ret = (jthrowable) JNIHandles::make_local(env, exception);
653
654 HOTSPOT_JNI_EXCEPTIONOCCURRED_RETURN(ret);
655 return ret;
656 JNI_END
657
658
659 JNI_ENTRY_NO_PRESERVE(void, jni_ExceptionDescribe(JNIEnv *env))
660 JNIWrapper("ExceptionDescribe");
661
662 HOTSPOT_JNI_EXCEPTIONDESCRIBE_ENTRY(env);
663
664 if (thread->has_pending_exception()) {
665 Handle ex(thread, thread->pending_exception());
666 thread->clear_pending_exception();
667 if (ex->is_a(SystemDictionary::ThreadDeath_klass())) {
668 // Don't print anything if we are being killed.
669 } else {
670 jio_fprintf(defaultStream::error_stream(), "Exception ");
671 if (thread != NULL && thread->threadObj() != NULL) {
672 ResourceMark rm(THREAD);
673 jio_fprintf(defaultStream::error_stream(),
674 "in thread \"%s\" ", thread->get_thread_name());
675 }
676 if (ex->is_a(SystemDictionary::Throwable_klass())) {
677 JavaValue result(T_VOID);
678 JavaCalls::call_virtual(&result,
679 ex,
680 KlassHandle(THREAD,
681 SystemDictionary::Throwable_klass()),
682 vmSymbols::printStackTrace_name(),
683 vmSymbols::void_method_signature(),
684 THREAD);
685 // If an exception is thrown in the call it gets thrown away. Not much
686 // we can do with it. The native code that calls this, does not check
687 // for the exception - hence, it might still be in the thread when DestroyVM gets
688 // called, potentially causing a few asserts to trigger - since no pending exception
689 // is expected.
690 CLEAR_PENDING_EXCEPTION;
691 } else {
692 ResourceMark rm(THREAD);
693 jio_fprintf(defaultStream::error_stream(),
694 ". Uncaught exception of type %s.",
695 ex->klass()->external_name());
696 }
697 }
698 }
699
700 HOTSPOT_JNI_EXCEPTIONDESCRIBE_RETURN();
701 JNI_END
702
703
704 JNI_QUICK_ENTRY(void, jni_ExceptionClear(JNIEnv *env))
705 JNIWrapper("ExceptionClear");
706
707 HOTSPOT_JNI_EXCEPTIONCLEAR_ENTRY(env);
708
709 // The jni code might be using this API to clear java thrown exception.
710 // So just mark jvmti thread exception state as exception caught.
711 JvmtiThreadState *state = JavaThread::current()->jvmti_thread_state();
712 if (state != NULL && state->is_exception_detected()) {
713 state->set_exception_caught();
714 }
715 thread->clear_pending_exception();
716
717 HOTSPOT_JNI_EXCEPTIONCLEAR_RETURN();
718 JNI_END
719
720
721 JNI_ENTRY(void, jni_FatalError(JNIEnv *env, const char *msg))
722 JNIWrapper("FatalError");
723
724 HOTSPOT_JNI_FATALERROR_ENTRY(env, (char *) msg);
725
726 tty->print_cr("FATAL ERROR in native method: %s", msg);
727 thread->print_stack();
728 os::abort(); // Dump core and abort
729 JNI_END
730
731
732 JNI_ENTRY(jint, jni_PushLocalFrame(JNIEnv *env, jint capacity))
733 JNIWrapper("PushLocalFrame");
734
735 HOTSPOT_JNI_PUSHLOCALFRAME_ENTRY(env, capacity);
736
737 //%note jni_11
738 if (capacity < 0 ||
739 ((MaxJNILocalCapacity > 0) && (capacity > MaxJNILocalCapacity))) {
740 HOTSPOT_JNI_PUSHLOCALFRAME_RETURN((uint32_t)JNI_ERR);
741 return JNI_ERR;
742 }
743 JNIHandleBlock* old_handles = thread->active_handles();
744 JNIHandleBlock* new_handles = JNIHandleBlock::allocate_block(thread);
745 assert(new_handles != NULL, "should not be NULL");
746 new_handles->set_pop_frame_link(old_handles);
747 thread->set_active_handles(new_handles);
748 jint ret = JNI_OK;
749 HOTSPOT_JNI_PUSHLOCALFRAME_RETURN(ret);
750 return ret;
751 JNI_END
752
753
754 JNI_ENTRY(jobject, jni_PopLocalFrame(JNIEnv *env, jobject result))
755 JNIWrapper("PopLocalFrame");
756
757 HOTSPOT_JNI_POPLOCALFRAME_ENTRY(env, result);
758
759 //%note jni_11
760 Handle result_handle(thread, JNIHandles::resolve(result));
761 JNIHandleBlock* old_handles = thread->active_handles();
762 JNIHandleBlock* new_handles = old_handles->pop_frame_link();
763 if (new_handles != NULL) {
764 // As a sanity check we only release the handle blocks if the pop_frame_link is not NULL.
765 // This way code will still work if PopLocalFrame is called without a corresponding
766 // PushLocalFrame call. Note that we set the pop_frame_link to NULL explicitly, otherwise
767 // the release_block call will release the blocks.
768 thread->set_active_handles(new_handles);
769 old_handles->set_pop_frame_link(NULL); // clear link we won't release new_handles below
770 JNIHandleBlock::release_block(old_handles, thread); // may block
771 result = JNIHandles::make_local(thread, result_handle());
772 }
773 HOTSPOT_JNI_POPLOCALFRAME_RETURN(result);
774 return result;
775 JNI_END
776
777
778 JNI_ENTRY(jobject, jni_NewGlobalRef(JNIEnv *env, jobject ref))
779 JNIWrapper("NewGlobalRef");
780
781 HOTSPOT_JNI_NEWGLOBALREF_ENTRY(env, ref);
782
783 Handle ref_handle(thread, JNIHandles::resolve(ref));
784 jobject ret = JNIHandles::make_global(ref_handle);
785
786 HOTSPOT_JNI_NEWGLOBALREF_RETURN(ret);
787 return ret;
788 JNI_END
789
790 // Must be JNI_ENTRY (with HandleMark)
791 JNI_ENTRY_NO_PRESERVE(void, jni_DeleteGlobalRef(JNIEnv *env, jobject ref))
792 JNIWrapper("DeleteGlobalRef");
793
794 HOTSPOT_JNI_DELETEGLOBALREF_ENTRY(env, ref);
795
796 JNIHandles::destroy_global(ref);
797
798 HOTSPOT_JNI_DELETEGLOBALREF_RETURN();
799 JNI_END
800
801 JNI_QUICK_ENTRY(void, jni_DeleteLocalRef(JNIEnv *env, jobject obj))
802 JNIWrapper("DeleteLocalRef");
803
804 HOTSPOT_JNI_DELETELOCALREF_ENTRY(env, obj);
805
806 JNIHandles::destroy_local(obj);
807
808 HOTSPOT_JNI_DELETELOCALREF_RETURN();
809 JNI_END
810
811 JNI_QUICK_ENTRY(jboolean, jni_IsSameObject(JNIEnv *env, jobject r1, jobject r2))
812 JNIWrapper("IsSameObject");
813
814 HOTSPOT_JNI_ISSAMEOBJECT_ENTRY(env, r1, r2);
815
816 oop a = JNIHandles::resolve(r1);
817 oop b = JNIHandles::resolve(r2);
818 jboolean ret = (a == b) ? JNI_TRUE : JNI_FALSE;
819
820 HOTSPOT_JNI_ISSAMEOBJECT_RETURN(ret);
821 return ret;
822 JNI_END
823
824
825 JNI_ENTRY(jobject, jni_NewLocalRef(JNIEnv *env, jobject ref))
826 JNIWrapper("NewLocalRef");
827
828 HOTSPOT_JNI_NEWLOCALREF_ENTRY(env, ref);
829
830 jobject ret = JNIHandles::make_local(env, JNIHandles::resolve(ref));
831
832 HOTSPOT_JNI_NEWLOCALREF_RETURN(ret);
833 return ret;
834 JNI_END
835
836 JNI_LEAF(jint, jni_EnsureLocalCapacity(JNIEnv *env, jint capacity))
837 JNIWrapper("EnsureLocalCapacity");
838
839 HOTSPOT_JNI_ENSURELOCALCAPACITY_ENTRY(env, capacity);
840
841 jint ret;
842 if (capacity >= 0 &&
843 ((MaxJNILocalCapacity <= 0) || (capacity <= MaxJNILocalCapacity))) {
844 ret = JNI_OK;
845 } else {
846 ret = JNI_ERR;
847 }
848
849 HOTSPOT_JNI_ENSURELOCALCAPACITY_RETURN(ret);
850 return ret;
851 JNI_END
852
853 // Return the Handle Type
854 JNI_LEAF(jobjectRefType, jni_GetObjectRefType(JNIEnv *env, jobject obj))
855 JNIWrapper("GetObjectRefType");
856
857 HOTSPOT_JNI_GETOBJECTREFTYPE_ENTRY(env, obj);
858
859 jobjectRefType ret;
860 if (JNIHandles::is_local_handle(thread, obj) ||
861 JNIHandles::is_frame_handle(thread, obj))
862 ret = JNILocalRefType;
863 else if (JNIHandles::is_global_handle(obj))
864 ret = JNIGlobalRefType;
865 else if (JNIHandles::is_weak_global_handle(obj))
866 ret = JNIWeakGlobalRefType;
867 else
868 ret = JNIInvalidRefType;
869
870 HOTSPOT_JNI_GETOBJECTREFTYPE_RETURN((void *) ret);
871 return ret;
872 JNI_END
873
874
875 class JNI_ArgumentPusher : public SignatureIterator {
876 protected:
877 JavaCallArguments* _arguments;
878
879 virtual void get_bool () = 0;
880 virtual void get_char () = 0;
881 virtual void get_short () = 0;
882 virtual void get_byte () = 0;
883 virtual void get_int () = 0;
884 virtual void get_long () = 0;
885 virtual void get_float () = 0;
886 virtual void get_double () = 0;
887 virtual void get_object () = 0;
888
889 JNI_ArgumentPusher(Symbol* signature) : SignatureIterator(signature) {
890 this->_return_type = T_ILLEGAL;
891 _arguments = NULL;
892 }
893
894 public:
895 virtual void iterate( uint64_t fingerprint ) = 0;
896
897 void set_java_argument_object(JavaCallArguments *arguments) { _arguments = arguments; }
898
899 inline void do_bool() { if (!is_return_type()) get_bool(); }
900 inline void do_char() { if (!is_return_type()) get_char(); }
901 inline void do_short() { if (!is_return_type()) get_short(); }
902 inline void do_byte() { if (!is_return_type()) get_byte(); }
903 inline void do_int() { if (!is_return_type()) get_int(); }
904 inline void do_long() { if (!is_return_type()) get_long(); }
905 inline void do_float() { if (!is_return_type()) get_float(); }
906 inline void do_double() { if (!is_return_type()) get_double(); }
907 inline void do_object(int begin, int end) { if (!is_return_type()) get_object(); }
908 inline void do_array(int begin, int end) { if (!is_return_type()) get_object(); } // do_array uses get_object -- there is no get_array
909 inline void do_void() { }
910
911 JavaCallArguments* arguments() { return _arguments; }
912 void push_receiver(Handle h) { _arguments->push_oop(h); }
913 };
914
915
916 class JNI_ArgumentPusherVaArg : public JNI_ArgumentPusher {
917 protected:
918 va_list _ap;
919
920 inline void get_bool() {
921 // Normalize boolean arguments from native code by converting 1-255 to JNI_TRUE and
922 // 0 to JNI_FALSE. Boolean return values from native are normalized the same in
923 // TemplateInterpreterGenerator::generate_result_handler_for and
924 // SharedRuntime::generate_native_wrapper.
925 jboolean b = va_arg(_ap, jint);
926 _arguments->push_int((jint)(b == 0 ? JNI_FALSE : JNI_TRUE));
927 }
928 inline void get_char() { _arguments->push_int(va_arg(_ap, jint)); } // char is coerced to int when using va_arg
929 inline void get_short() { _arguments->push_int(va_arg(_ap, jint)); } // short is coerced to int when using va_arg
930 inline void get_byte() { _arguments->push_int(va_arg(_ap, jint)); } // byte is coerced to int when using va_arg
931 inline void get_int() { _arguments->push_int(va_arg(_ap, jint)); }
932
933 // each of these paths is exercized by the various jck Call[Static,Nonvirtual,][Void,Int,..]Method[A,V,] tests
934
935 inline void get_long() { _arguments->push_long(va_arg(_ap, jlong)); }
936 inline void get_float() { _arguments->push_float((jfloat)va_arg(_ap, jdouble)); } // float is coerced to double w/ va_arg
937 inline void get_double() { _arguments->push_double(va_arg(_ap, jdouble)); }
938 inline void get_object() { jobject l = va_arg(_ap, jobject);
939 _arguments->push_oop(Handle((oop *)l, false)); }
940
941 inline void set_ap(va_list rap) {
942 va_copy(_ap, rap);
943 }
944
945 public:
946 JNI_ArgumentPusherVaArg(Symbol* signature, va_list rap)
947 : JNI_ArgumentPusher(signature) {
948 set_ap(rap);
949 }
950 JNI_ArgumentPusherVaArg(jmethodID method_id, va_list rap)
951 : JNI_ArgumentPusher(Method::resolve_jmethod_id(method_id)->signature()) {
952 set_ap(rap);
953 }
954
955 // Optimized path if we have the bitvector form of signature
956 void iterate( uint64_t fingerprint ) {
957 if (fingerprint == (uint64_t)CONST64(-1)) {
958 SignatureIterator::iterate(); // Must be too many arguments
959 } else {
960 _return_type = (BasicType)((fingerprint >> static_feature_size) &
961 result_feature_mask);
962
963 assert(fingerprint, "Fingerprint should not be 0");
964 fingerprint = fingerprint >> (static_feature_size + result_feature_size);
965 while ( 1 ) {
966 switch ( fingerprint & parameter_feature_mask ) {
967 case bool_parm:
968 get_bool();
969 break;
970 case char_parm:
971 get_char();
972 break;
973 case short_parm:
974 get_short();
975 break;
976 case byte_parm:
977 get_byte();
978 break;
979 case int_parm:
980 get_int();
981 break;
982 case obj_parm:
983 get_object();
984 break;
985 case long_parm:
986 get_long();
987 break;
988 case float_parm:
989 get_float();
990 break;
991 case double_parm:
992 get_double();
993 break;
994 case done_parm:
995 return;
996 break;
997 default:
998 ShouldNotReachHere();
999 break;
1000 }
1001 fingerprint >>= parameter_feature_size;
1002 }
1003 }
1004 }
1005 };
1006
1007
1008 class JNI_ArgumentPusherArray : public JNI_ArgumentPusher {
1009 protected:
1010 const jvalue *_ap;
1011
1012 inline void get_bool() {
1013 // Normalize boolean arguments from native code by converting 1-255 to JNI_TRUE and
1014 // 0 to JNI_FALSE. Boolean return values from native are normalized the same in
1015 // TemplateInterpreterGenerator::generate_result_handler_for and
1016 // SharedRuntime::generate_native_wrapper.
1017 jboolean b = (_ap++)->z;
1018 _arguments->push_int((jint)(b == 0 ? JNI_FALSE : JNI_TRUE));
1019 }
1020 inline void get_char() { _arguments->push_int((jint)(_ap++)->c); }
1021 inline void get_short() { _arguments->push_int((jint)(_ap++)->s); }
1022 inline void get_byte() { _arguments->push_int((jint)(_ap++)->b); }
1023 inline void get_int() { _arguments->push_int((jint)(_ap++)->i); }
1024
1025 inline void get_long() { _arguments->push_long((_ap++)->j); }
1026 inline void get_float() { _arguments->push_float((_ap++)->f); }
1027 inline void get_double() { _arguments->push_double((_ap++)->d);}
1028 inline void get_object() { _arguments->push_oop(Handle((oop *)(_ap++)->l, false)); }
1029
1030 inline void set_ap(const jvalue *rap) { _ap = rap; }
1031
1032 public:
1033 JNI_ArgumentPusherArray(Symbol* signature, const jvalue *rap)
1034 : JNI_ArgumentPusher(signature) {
1035 set_ap(rap);
1036 }
1037 JNI_ArgumentPusherArray(jmethodID method_id, const jvalue *rap)
1038 : JNI_ArgumentPusher(Method::resolve_jmethod_id(method_id)->signature()) {
1039 set_ap(rap);
1040 }
1041
1042 // Optimized path if we have the bitvector form of signature
1043 void iterate( uint64_t fingerprint ) {
1044 if (fingerprint == (uint64_t)CONST64(-1)) {
1045 SignatureIterator::iterate(); // Must be too many arguments
1046 } else {
1047 _return_type = (BasicType)((fingerprint >> static_feature_size) &
1048 result_feature_mask);
1049 assert(fingerprint, "Fingerprint should not be 0");
1050 fingerprint = fingerprint >> (static_feature_size + result_feature_size);
1051 while ( 1 ) {
1052 switch ( fingerprint & parameter_feature_mask ) {
1053 case bool_parm:
1054 get_bool();
1055 break;
1056 case char_parm:
1057 get_char();
1058 break;
1059 case short_parm:
1060 get_short();
1061 break;
1062 case byte_parm:
1063 get_byte();
1064 break;
1065 case int_parm:
1066 get_int();
1067 break;
1068 case obj_parm:
1069 get_object();
1070 break;
1071 case long_parm:
1072 get_long();
1073 break;
1074 case float_parm:
1075 get_float();
1076 break;
1077 case double_parm:
1078 get_double();
1079 break;
1080 case done_parm:
1081 return;
1082 break;
1083 default:
1084 ShouldNotReachHere();
1085 break;
1086 }
1087 fingerprint >>= parameter_feature_size;
1088 }
1089 }
1090 }
1091 };
1092
1093
1094 enum JNICallType {
1095 JNI_STATIC,
1096 JNI_VIRTUAL,
1097 JNI_NONVIRTUAL
1098 };
1099
1100
1101
1102 static void jni_invoke_static(JNIEnv *env, JavaValue* result, jobject receiver, JNICallType call_type, jmethodID method_id, JNI_ArgumentPusher *args, TRAPS) {
1103 methodHandle method(THREAD, Method::resolve_jmethod_id(method_id));
1104
1105 // Create object to hold arguments for the JavaCall, and associate it with
1106 // the jni parser
1107 ResourceMark rm(THREAD);
1108 int number_of_parameters = method->size_of_parameters();
1109 JavaCallArguments java_args(number_of_parameters);
1110 args->set_java_argument_object(&java_args);
1111
1112 assert(method->is_static(), "method should be static");
1113
1114 // Fill out JavaCallArguments object
1115 args->iterate( Fingerprinter(method).fingerprint() );
1116 // Initialize result type
1117 result->set_type(args->get_ret_type());
1118
1119 // Invoke the method. Result is returned as oop.
1120 JavaCalls::call(result, method, &java_args, CHECK);
1121
1122 // Convert result
1123 if (result->get_type() == T_OBJECT || result->get_type() == T_ARRAY) {
1124 result->set_jobject(JNIHandles::make_local(env, (oop) result->get_jobject()));
1125 }
1126 }
1127
1128
1129 static void jni_invoke_nonstatic(JNIEnv *env, JavaValue* result, jobject receiver, JNICallType call_type, jmethodID method_id, JNI_ArgumentPusher *args, TRAPS) {
1130 oop recv = JNIHandles::resolve(receiver);
1131 if (recv == NULL) {
1132 THROW(vmSymbols::java_lang_NullPointerException());
1133 }
1134 Handle h_recv(THREAD, recv);
1135
1136 int number_of_parameters;
1137 Method* selected_method;
1138 {
1139 Method* m = Method::resolve_jmethod_id(method_id);
1140 number_of_parameters = m->size_of_parameters();
1141 Klass* holder = m->method_holder();
1142 if (call_type != JNI_VIRTUAL) {
1143 selected_method = m;
1144 } else if (!m->has_itable_index()) {
1145 // non-interface call -- for that little speed boost, don't handlize
1146 debug_only(NoSafepointVerifier nosafepoint;)
1147 // jni_GetMethodID makes sure class is linked and initialized
1148 // so m should have a valid vtable index.
1149 assert(m->valid_vtable_index(), "no valid vtable index");
1150 int vtbl_index = m->vtable_index();
1151 if (vtbl_index != Method::nonvirtual_vtable_index) {
1152 selected_method = h_recv->klass()->method_at_vtable(vtbl_index);
1153 } else {
1154 // final method
1155 selected_method = m;
1156 }
1157 } else {
1158 // interface call
1159 KlassHandle h_holder(THREAD, holder);
1160
1161 int itbl_index = m->itable_index();
1162 Klass* k = h_recv->klass();
1163 selected_method = InstanceKlass::cast(k)->method_at_itable(h_holder(), itbl_index, CHECK);
1164 }
1165 }
1166
1167 methodHandle method(THREAD, selected_method);
1168
1169 // Create object to hold arguments for the JavaCall, and associate it with
1170 // the jni parser
1171 ResourceMark rm(THREAD);
1172 JavaCallArguments java_args(number_of_parameters);
1173 args->set_java_argument_object(&java_args);
1174
1175 // handle arguments
1176 assert(!method->is_static(), "method %s should not be static", method->name_and_sig_as_C_string());
1177 args->push_receiver(h_recv); // Push jobject handle
1178
1179 // Fill out JavaCallArguments object
1180 args->iterate( Fingerprinter(method).fingerprint() );
1181 // Initialize result type
1182 result->set_type(args->get_ret_type());
1183
1184 // Invoke the method. Result is returned as oop.
1185 JavaCalls::call(result, method, &java_args, CHECK);
1186
1187 // Convert result
1188 if (result->get_type() == T_OBJECT || result->get_type() == T_ARRAY) {
1189 result->set_jobject(JNIHandles::make_local(env, (oop) result->get_jobject()));
1190 }
1191 }
1192
1193
1194 static instanceOop alloc_object(jclass clazz, TRAPS) {
1195 KlassHandle k(THREAD, java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz)));
1196 if (k == NULL) {
1197 ResourceMark rm(THREAD);
1198 THROW_(vmSymbols::java_lang_InstantiationException(), NULL);
1199 }
1200 k()->check_valid_for_instantiation(false, CHECK_NULL);
1201 InstanceKlass::cast(k())->initialize(CHECK_NULL);
1202 instanceOop ih = InstanceKlass::cast(k())->allocate_instance(THREAD);
1203 return ih;
1204 }
1205
1206 DT_RETURN_MARK_DECL(AllocObject, jobject
1207 , HOTSPOT_JNI_ALLOCOBJECT_RETURN(_ret_ref));
1208
1209 JNI_ENTRY(jobject, jni_AllocObject(JNIEnv *env, jclass clazz))
1210 JNIWrapper("AllocObject");
1211
1212 HOTSPOT_JNI_ALLOCOBJECT_ENTRY(env, clazz);
1213
1214 jobject ret = NULL;
1215 DT_RETURN_MARK(AllocObject, jobject, (const jobject&)ret);
1216
1217 instanceOop i = alloc_object(clazz, CHECK_NULL);
1218 ret = JNIHandles::make_local(env, i);
1219 return ret;
1220 JNI_END
1221
1222 DT_RETURN_MARK_DECL(NewObjectA, jobject
1223 , HOTSPOT_JNI_NEWOBJECTA_RETURN(_ret_ref));
1224
1225 JNI_ENTRY(jobject, jni_NewObjectA(JNIEnv *env, jclass clazz, jmethodID methodID, const jvalue *args))
1226 JNIWrapper("NewObjectA");
1227
1228 HOTSPOT_JNI_NEWOBJECTA_ENTRY(env, clazz, (uintptr_t) methodID);
1229
1230 jobject obj = NULL;
1231 DT_RETURN_MARK(NewObjectA, 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_ArgumentPusherArray 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(NewObjectV, jobject
1243 , HOTSPOT_JNI_NEWOBJECTV_RETURN(_ret_ref));
1244
1245 JNI_ENTRY(jobject, jni_NewObjectV(JNIEnv *env, jclass clazz, jmethodID methodID, va_list args))
1246 JNIWrapper("NewObjectV");
1247
1248 HOTSPOT_JNI_NEWOBJECTV_ENTRY(env, clazz, (uintptr_t) methodID);
1249
1250 jobject obj = NULL;
1251 DT_RETURN_MARK(NewObjectV, jobject, (const jobject&)obj);
1252
1253 instanceOop i = alloc_object(clazz, CHECK_NULL);
1254 obj = JNIHandles::make_local(env, i);
1255 JavaValue jvalue(T_VOID);
1256 JNI_ArgumentPusherVaArg ap(methodID, args);
1257 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_NULL);
1258 return obj;
1259 JNI_END
1260
1261
1262 DT_RETURN_MARK_DECL(NewObject, jobject
1263 , HOTSPOT_JNI_NEWOBJECT_RETURN(_ret_ref));
1264
1265 JNI_ENTRY(jobject, jni_NewObject(JNIEnv *env, jclass clazz, jmethodID methodID, ...))
1266 JNIWrapper("NewObject");
1267
1268 HOTSPOT_JNI_NEWOBJECT_ENTRY(env, clazz, (uintptr_t) methodID);
1269
1270 jobject obj = NULL;
1271 DT_RETURN_MARK(NewObject, jobject, (const jobject&)obj);
1272
1273 instanceOop i = alloc_object(clazz, CHECK_NULL);
1274 obj = JNIHandles::make_local(env, i);
1275 va_list args;
1276 va_start(args, methodID);
1277 JavaValue jvalue(T_VOID);
1278 JNI_ArgumentPusherVaArg ap(methodID, args);
1279 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_NULL);
1280 va_end(args);
1281 return obj;
1282 JNI_END
1283
1284
1285 JNI_ENTRY(jclass, jni_GetObjectClass(JNIEnv *env, jobject obj))
1286 JNIWrapper("GetObjectClass");
1287
1288 HOTSPOT_JNI_GETOBJECTCLASS_ENTRY(env, obj);
1289
1290 Klass* k = JNIHandles::resolve_non_null(obj)->klass();
1291 jclass ret =
1292 (jclass) JNIHandles::make_local(env, k->java_mirror());
1293
1294 HOTSPOT_JNI_GETOBJECTCLASS_RETURN(ret);
1295 return ret;
1296 JNI_END
1297
1298 JNI_QUICK_ENTRY(jboolean, jni_IsInstanceOf(JNIEnv *env, jobject obj, jclass clazz))
1299 JNIWrapper("IsInstanceOf");
1300
1301 HOTSPOT_JNI_ISINSTANCEOF_ENTRY(env, obj, clazz);
1302
1303 jboolean ret = JNI_TRUE;
1304 if (obj != NULL) {
1305 ret = JNI_FALSE;
1306 Klass* k = java_lang_Class::as_Klass(
1307 JNIHandles::resolve_non_null(clazz));
1308 if (k != NULL) {
1309 ret = JNIHandles::resolve_non_null(obj)->is_a(k) ? JNI_TRUE : JNI_FALSE;
1310 }
1311 }
1312
1313 HOTSPOT_JNI_ISINSTANCEOF_RETURN(ret);
1314 return ret;
1315 JNI_END
1316
1317
1318 static jmethodID get_method_id(JNIEnv *env, jclass clazz, const char *name_str,
1319 const char *sig, bool is_static, TRAPS) {
1320 // %%%% This code should probably just call into a method in the LinkResolver
1321 //
1322 // The class should have been loaded (we have an instance of the class
1323 // passed in) so the method and signature should already be in the symbol
1324 // table. If they're not there, the method doesn't exist.
1325 const char *name_to_probe = (name_str == NULL)
1326 ? vmSymbols::object_initializer_name()->as_C_string()
1327 : name_str;
1328 TempNewSymbol name = SymbolTable::probe(name_to_probe, (int)strlen(name_to_probe));
1329 TempNewSymbol signature = SymbolTable::probe(sig, (int)strlen(sig));
1330
1331 if (name == NULL || signature == NULL) {
1332 THROW_MSG_0(vmSymbols::java_lang_NoSuchMethodError(), name_str);
1333 }
1334
1335 // Throw a NoSuchMethodError exception if we have an instance of a
1336 // primitive java.lang.Class
1337 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(clazz))) {
1338 THROW_MSG_0(vmSymbols::java_lang_NoSuchMethodError(), name_str);
1339 }
1340
1341 KlassHandle klass(THREAD,
1342 java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz)));
1343
1344 // Make sure class is linked and initialized before handing id's out to
1345 // Method*s.
1346 klass()->initialize(CHECK_NULL);
1347
1348 Method* m;
1349 if (name == vmSymbols::object_initializer_name() ||
1350 name == vmSymbols::class_initializer_name()) {
1351 // Never search superclasses for constructors
1352 if (klass->is_instance_klass()) {
1353 m = InstanceKlass::cast(klass())->find_method(name, signature);
1354 } else {
1355 m = NULL;
1356 }
1357 } else {
1358 m = klass->lookup_method(name, signature);
1359 if (m == NULL && klass->is_instance_klass()) {
1360 m = InstanceKlass::cast(klass())->lookup_method_in_ordered_interfaces(name, signature);
1361 }
1362 }
1363 if (m == NULL || (m->is_static() != is_static)) {
1364 THROW_MSG_0(vmSymbols::java_lang_NoSuchMethodError(), name_str);
1365 }
1366 return m->jmethod_id();
1367 }
1368
1369
1370 JNI_ENTRY(jmethodID, jni_GetMethodID(JNIEnv *env, jclass clazz,
1371 const char *name, const char *sig))
1372 JNIWrapper("GetMethodID");
1373 HOTSPOT_JNI_GETMETHODID_ENTRY(env, clazz, (char *) name, (char *) sig);
1374 jmethodID ret = get_method_id(env, clazz, name, sig, false, thread);
1375 HOTSPOT_JNI_GETMETHODID_RETURN((uintptr_t) ret);
1376 return ret;
1377 JNI_END
1378
1379
1380 JNI_ENTRY(jmethodID, jni_GetStaticMethodID(JNIEnv *env, jclass clazz,
1381 const char *name, const char *sig))
1382 JNIWrapper("GetStaticMethodID");
1383 HOTSPOT_JNI_GETSTATICMETHODID_ENTRY(env, (char *) clazz, (char *) name, (char *)sig);
1384 jmethodID ret = get_method_id(env, clazz, name, sig, true, thread);
1385 HOTSPOT_JNI_GETSTATICMETHODID_RETURN((uintptr_t) ret);
1386 return ret;
1387 JNI_END
1388
1389
1390
1391 //
1392 // Calling Methods
1393 //
1394
1395
1396 #define DEFINE_CALLMETHOD(ResultType, Result, Tag \
1397 , EntryProbe, ReturnProbe) \
1398 \
1399 DT_RETURN_MARK_DECL_FOR(Result, Call##Result##Method, ResultType \
1400 , ReturnProbe); \
1401 \
1402 JNI_ENTRY(ResultType, \
1403 jni_Call##Result##Method(JNIEnv *env, jobject obj, jmethodID methodID, ...)) \
1404 JNIWrapper("Call" XSTR(Result) "Method"); \
1405 \
1406 EntryProbe; \
1407 ResultType ret = 0;\
1408 DT_RETURN_MARK_FOR(Result, Call##Result##Method, ResultType, \
1409 (const ResultType&)ret);\
1410 \
1411 va_list args; \
1412 va_start(args, methodID); \
1413 JavaValue jvalue(Tag); \
1414 JNI_ArgumentPusherVaArg ap(methodID, args); \
1415 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK_0); \
1416 va_end(args); \
1417 ret = jvalue.get_##ResultType(); \
1418 return ret;\
1419 JNI_END
1420
1421 // the runtime type of subword integral basic types is integer
1422 DEFINE_CALLMETHOD(jboolean, Boolean, T_BOOLEAN
1423 , HOTSPOT_JNI_CALLBOOLEANMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1424 HOTSPOT_JNI_CALLBOOLEANMETHOD_RETURN(_ret_ref))
1425 DEFINE_CALLMETHOD(jbyte, Byte, T_BYTE
1426 , HOTSPOT_JNI_CALLBYTEMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1427 HOTSPOT_JNI_CALLBYTEMETHOD_RETURN(_ret_ref))
1428 DEFINE_CALLMETHOD(jchar, Char, T_CHAR
1429 , HOTSPOT_JNI_CALLCHARMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1430 HOTSPOT_JNI_CALLCHARMETHOD_RETURN(_ret_ref))
1431 DEFINE_CALLMETHOD(jshort, Short, T_SHORT
1432 , HOTSPOT_JNI_CALLSHORTMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1433 HOTSPOT_JNI_CALLSHORTMETHOD_RETURN(_ret_ref))
1434
1435 DEFINE_CALLMETHOD(jobject, Object, T_OBJECT
1436 , HOTSPOT_JNI_CALLOBJECTMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1437 HOTSPOT_JNI_CALLOBJECTMETHOD_RETURN(_ret_ref))
1438 DEFINE_CALLMETHOD(jint, Int, T_INT,
1439 HOTSPOT_JNI_CALLINTMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1440 HOTSPOT_JNI_CALLINTMETHOD_RETURN(_ret_ref))
1441 DEFINE_CALLMETHOD(jlong, Long, T_LONG
1442 , HOTSPOT_JNI_CALLLONGMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1443 HOTSPOT_JNI_CALLLONGMETHOD_RETURN(_ret_ref))
1444 // Float and double probes don't return value because dtrace doesn't currently support it
1445 DEFINE_CALLMETHOD(jfloat, Float, T_FLOAT
1446 , HOTSPOT_JNI_CALLFLOATMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1447 HOTSPOT_JNI_CALLFLOATMETHOD_RETURN())
1448 DEFINE_CALLMETHOD(jdouble, Double, T_DOUBLE
1449 , HOTSPOT_JNI_CALLDOUBLEMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1450 HOTSPOT_JNI_CALLDOUBLEMETHOD_RETURN())
1451
1452 #define DEFINE_CALLMETHODV(ResultType, Result, Tag \
1453 , EntryProbe, ReturnProbe) \
1454 \
1455 DT_RETURN_MARK_DECL_FOR(Result, Call##Result##MethodV, ResultType \
1456 , ReturnProbe); \
1457 \
1458 JNI_ENTRY(ResultType, \
1459 jni_Call##Result##MethodV(JNIEnv *env, jobject obj, jmethodID methodID, va_list args)) \
1460 JNIWrapper("Call" XSTR(Result) "MethodV"); \
1461 \
1462 EntryProbe;\
1463 ResultType ret = 0;\
1464 DT_RETURN_MARK_FOR(Result, Call##Result##MethodV, ResultType, \
1465 (const ResultType&)ret);\
1466 \
1467 JavaValue jvalue(Tag); \
1468 JNI_ArgumentPusherVaArg ap(methodID, args); \
1469 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK_0); \
1470 ret = jvalue.get_##ResultType(); \
1471 return ret;\
1472 JNI_END
1473
1474 // the runtime type of subword integral basic types is integer
1475 DEFINE_CALLMETHODV(jboolean, Boolean, T_BOOLEAN
1476 , HOTSPOT_JNI_CALLBOOLEANMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1477 HOTSPOT_JNI_CALLBOOLEANMETHODV_RETURN(_ret_ref))
1478 DEFINE_CALLMETHODV(jbyte, Byte, T_BYTE
1479 , HOTSPOT_JNI_CALLBYTEMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1480 HOTSPOT_JNI_CALLBYTEMETHODV_RETURN(_ret_ref))
1481 DEFINE_CALLMETHODV(jchar, Char, T_CHAR
1482 , HOTSPOT_JNI_CALLCHARMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1483 HOTSPOT_JNI_CALLCHARMETHODV_RETURN(_ret_ref))
1484 DEFINE_CALLMETHODV(jshort, Short, T_SHORT
1485 , HOTSPOT_JNI_CALLSHORTMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1486 HOTSPOT_JNI_CALLSHORTMETHODV_RETURN(_ret_ref))
1487
1488 DEFINE_CALLMETHODV(jobject, Object, T_OBJECT
1489 , HOTSPOT_JNI_CALLOBJECTMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1490 HOTSPOT_JNI_CALLOBJECTMETHODV_RETURN(_ret_ref))
1491 DEFINE_CALLMETHODV(jint, Int, T_INT,
1492 HOTSPOT_JNI_CALLINTMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1493 HOTSPOT_JNI_CALLINTMETHODV_RETURN(_ret_ref))
1494 DEFINE_CALLMETHODV(jlong, Long, T_LONG
1495 , HOTSPOT_JNI_CALLLONGMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1496 HOTSPOT_JNI_CALLLONGMETHODV_RETURN(_ret_ref))
1497 // Float and double probes don't return value because dtrace doesn't currently support it
1498 DEFINE_CALLMETHODV(jfloat, Float, T_FLOAT
1499 , HOTSPOT_JNI_CALLFLOATMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1500 HOTSPOT_JNI_CALLFLOATMETHODV_RETURN())
1501 DEFINE_CALLMETHODV(jdouble, Double, T_DOUBLE
1502 , HOTSPOT_JNI_CALLDOUBLEMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1503 HOTSPOT_JNI_CALLDOUBLEMETHODV_RETURN())
1504
1505 #define DEFINE_CALLMETHODA(ResultType, Result, Tag \
1506 , EntryProbe, ReturnProbe) \
1507 \
1508 DT_RETURN_MARK_DECL_FOR(Result, Call##Result##MethodA, ResultType \
1509 , ReturnProbe); \
1510 \
1511 JNI_ENTRY(ResultType, \
1512 jni_Call##Result##MethodA(JNIEnv *env, jobject obj, jmethodID methodID, const jvalue *args)) \
1513 JNIWrapper("Call" XSTR(Result) "MethodA"); \
1514 EntryProbe; \
1515 ResultType ret = 0;\
1516 DT_RETURN_MARK_FOR(Result, Call##Result##MethodA, ResultType, \
1517 (const ResultType&)ret);\
1518 \
1519 JavaValue jvalue(Tag); \
1520 JNI_ArgumentPusherArray ap(methodID, args); \
1521 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK_0); \
1522 ret = jvalue.get_##ResultType(); \
1523 return ret;\
1524 JNI_END
1525
1526 // the runtime type of subword integral basic types is integer
1527 DEFINE_CALLMETHODA(jboolean, Boolean, T_BOOLEAN
1528 , HOTSPOT_JNI_CALLBOOLEANMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1529 HOTSPOT_JNI_CALLBOOLEANMETHODA_RETURN(_ret_ref))
1530 DEFINE_CALLMETHODA(jbyte, Byte, T_BYTE
1531 , HOTSPOT_JNI_CALLBYTEMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1532 HOTSPOT_JNI_CALLBYTEMETHODA_RETURN(_ret_ref))
1533 DEFINE_CALLMETHODA(jchar, Char, T_CHAR
1534 , HOTSPOT_JNI_CALLCHARMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1535 HOTSPOT_JNI_CALLCHARMETHODA_RETURN(_ret_ref))
1536 DEFINE_CALLMETHODA(jshort, Short, T_SHORT
1537 , HOTSPOT_JNI_CALLSHORTMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1538 HOTSPOT_JNI_CALLSHORTMETHODA_RETURN(_ret_ref))
1539
1540 DEFINE_CALLMETHODA(jobject, Object, T_OBJECT
1541 , HOTSPOT_JNI_CALLOBJECTMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1542 HOTSPOT_JNI_CALLOBJECTMETHODA_RETURN(_ret_ref))
1543 DEFINE_CALLMETHODA(jint, Int, T_INT,
1544 HOTSPOT_JNI_CALLINTMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1545 HOTSPOT_JNI_CALLINTMETHODA_RETURN(_ret_ref))
1546 DEFINE_CALLMETHODA(jlong, Long, T_LONG
1547 , HOTSPOT_JNI_CALLLONGMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1548 HOTSPOT_JNI_CALLLONGMETHODA_RETURN(_ret_ref))
1549 // Float and double probes don't return value because dtrace doesn't currently support it
1550 DEFINE_CALLMETHODA(jfloat, Float, T_FLOAT
1551 , HOTSPOT_JNI_CALLFLOATMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1552 HOTSPOT_JNI_CALLFLOATMETHODA_RETURN())
1553 DEFINE_CALLMETHODA(jdouble, Double, T_DOUBLE
1554 , HOTSPOT_JNI_CALLDOUBLEMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1555 HOTSPOT_JNI_CALLDOUBLEMETHODA_RETURN())
1556
1557 DT_VOID_RETURN_MARK_DECL(CallVoidMethod, HOTSPOT_JNI_CALLVOIDMETHOD_RETURN());
1558 DT_VOID_RETURN_MARK_DECL(CallVoidMethodV, HOTSPOT_JNI_CALLVOIDMETHODV_RETURN());
1559 DT_VOID_RETURN_MARK_DECL(CallVoidMethodA, HOTSPOT_JNI_CALLVOIDMETHODA_RETURN());
1560
1561
1562 JNI_ENTRY(void, jni_CallVoidMethod(JNIEnv *env, jobject obj, jmethodID methodID, ...))
1563 JNIWrapper("CallVoidMethod");
1564 HOTSPOT_JNI_CALLVOIDMETHOD_ENTRY(env, obj, (uintptr_t) methodID);
1565 DT_VOID_RETURN_MARK(CallVoidMethod);
1566
1567 va_list args;
1568 va_start(args, methodID);
1569 JavaValue jvalue(T_VOID);
1570 JNI_ArgumentPusherVaArg ap(methodID, args);
1571 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK);
1572 va_end(args);
1573 JNI_END
1574
1575
1576 JNI_ENTRY(void, jni_CallVoidMethodV(JNIEnv *env, jobject obj, jmethodID methodID, va_list args))
1577 JNIWrapper("CallVoidMethodV");
1578 HOTSPOT_JNI_CALLVOIDMETHODV_ENTRY(env, obj, (uintptr_t) methodID);
1579 DT_VOID_RETURN_MARK(CallVoidMethodV);
1580
1581 JavaValue jvalue(T_VOID);
1582 JNI_ArgumentPusherVaArg ap(methodID, args);
1583 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK);
1584 JNI_END
1585
1586
1587 JNI_ENTRY(void, jni_CallVoidMethodA(JNIEnv *env, jobject obj, jmethodID methodID, const jvalue *args))
1588 JNIWrapper("CallVoidMethodA");
1589 HOTSPOT_JNI_CALLVOIDMETHODA_ENTRY(env, obj, (uintptr_t) methodID);
1590 DT_VOID_RETURN_MARK(CallVoidMethodA);
1591
1592 JavaValue jvalue(T_VOID);
1593 JNI_ArgumentPusherArray ap(methodID, args);
1594 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK);
1595 JNI_END
1596
1597
1598
1599 #define DEFINE_CALLNONVIRTUALMETHOD(ResultType, Result, Tag \
1600 , EntryProbe, ReturnProbe) \
1601 \
1602 DT_RETURN_MARK_DECL_FOR(Result, CallNonvirtual##Result##Method, ResultType \
1603 , ReturnProbe);\
1604 \
1605 JNI_ENTRY(ResultType, \
1606 jni_CallNonvirtual##Result##Method(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, ...)) \
1607 JNIWrapper("CallNonvitual" XSTR(Result) "Method"); \
1608 \
1609 EntryProbe;\
1610 ResultType ret;\
1611 DT_RETURN_MARK_FOR(Result, CallNonvirtual##Result##Method, ResultType, \
1612 (const ResultType&)ret);\
1613 \
1614 va_list args; \
1615 va_start(args, methodID); \
1616 JavaValue jvalue(Tag); \
1617 JNI_ArgumentPusherVaArg ap(methodID, args); \
1618 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_0); \
1619 va_end(args); \
1620 ret = jvalue.get_##ResultType(); \
1621 return ret;\
1622 JNI_END
1623
1624 // the runtime type of subword integral basic types is integer
1625 DEFINE_CALLNONVIRTUALMETHOD(jboolean, Boolean, T_BOOLEAN
1626 , HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1627 HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHOD_RETURN(_ret_ref))
1628 DEFINE_CALLNONVIRTUALMETHOD(jbyte, Byte, T_BYTE
1629 , HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1630 HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHOD_RETURN(_ret_ref))
1631 DEFINE_CALLNONVIRTUALMETHOD(jchar, Char, T_CHAR
1632 , HOTSPOT_JNI_CALLNONVIRTUALCHARMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1633 HOTSPOT_JNI_CALLNONVIRTUALCHARMETHOD_RETURN(_ret_ref))
1634 DEFINE_CALLNONVIRTUALMETHOD(jshort, Short, T_SHORT
1635 , HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1636 HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHOD_RETURN(_ret_ref))
1637
1638 DEFINE_CALLNONVIRTUALMETHOD(jobject, Object, T_OBJECT
1639 , HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1640 HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHOD_RETURN(_ret_ref))
1641 DEFINE_CALLNONVIRTUALMETHOD(jint, Int, T_INT
1642 , HOTSPOT_JNI_CALLNONVIRTUALINTMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1643 HOTSPOT_JNI_CALLNONVIRTUALINTMETHOD_RETURN(_ret_ref))
1644 DEFINE_CALLNONVIRTUALMETHOD(jlong, Long, T_LONG
1645 , HOTSPOT_JNI_CALLNONVIRTUALLONGMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1646 // Float and double probes don't return value because dtrace doesn't currently support it
1647 HOTSPOT_JNI_CALLNONVIRTUALLONGMETHOD_RETURN(_ret_ref))
1648 DEFINE_CALLNONVIRTUALMETHOD(jfloat, Float, T_FLOAT
1649 , HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1650 HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHOD_RETURN())
1651 DEFINE_CALLNONVIRTUALMETHOD(jdouble, Double, T_DOUBLE
1652 , HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1653 HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHOD_RETURN())
1654
1655 #define DEFINE_CALLNONVIRTUALMETHODV(ResultType, Result, Tag \
1656 , EntryProbe, ReturnProbe) \
1657 \
1658 DT_RETURN_MARK_DECL_FOR(Result, CallNonvirtual##Result##MethodV, ResultType \
1659 , ReturnProbe);\
1660 \
1661 JNI_ENTRY(ResultType, \
1662 jni_CallNonvirtual##Result##MethodV(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, va_list args)) \
1663 JNIWrapper("CallNonvitual" XSTR(Result) "MethodV"); \
1664 \
1665 EntryProbe;\
1666 ResultType ret;\
1667 DT_RETURN_MARK_FOR(Result, CallNonvirtual##Result##MethodV, ResultType, \
1668 (const ResultType&)ret);\
1669 \
1670 JavaValue jvalue(Tag); \
1671 JNI_ArgumentPusherVaArg ap(methodID, args); \
1672 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_0); \
1673 ret = jvalue.get_##ResultType(); \
1674 return ret;\
1675 JNI_END
1676
1677 // the runtime type of subword integral basic types is integer
1678 DEFINE_CALLNONVIRTUALMETHODV(jboolean, Boolean, T_BOOLEAN
1679 , HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1680 HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHODV_RETURN(_ret_ref))
1681 DEFINE_CALLNONVIRTUALMETHODV(jbyte, Byte, T_BYTE
1682 , HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1683 HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHODV_RETURN(_ret_ref))
1684 DEFINE_CALLNONVIRTUALMETHODV(jchar, Char, T_CHAR
1685 , HOTSPOT_JNI_CALLNONVIRTUALCHARMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1686 HOTSPOT_JNI_CALLNONVIRTUALCHARMETHODV_RETURN(_ret_ref))
1687 DEFINE_CALLNONVIRTUALMETHODV(jshort, Short, T_SHORT
1688 , HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1689 HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHODV_RETURN(_ret_ref))
1690
1691 DEFINE_CALLNONVIRTUALMETHODV(jobject, Object, T_OBJECT
1692 , HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1693 HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHODV_RETURN(_ret_ref))
1694 DEFINE_CALLNONVIRTUALMETHODV(jint, Int, T_INT
1695 , HOTSPOT_JNI_CALLNONVIRTUALINTMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1696 HOTSPOT_JNI_CALLNONVIRTUALINTMETHODV_RETURN(_ret_ref))
1697 DEFINE_CALLNONVIRTUALMETHODV(jlong, Long, T_LONG
1698 , HOTSPOT_JNI_CALLNONVIRTUALLONGMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1699 // Float and double probes don't return value because dtrace doesn't currently support it
1700 HOTSPOT_JNI_CALLNONVIRTUALLONGMETHODV_RETURN(_ret_ref))
1701 DEFINE_CALLNONVIRTUALMETHODV(jfloat, Float, T_FLOAT
1702 , HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1703 HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHODV_RETURN())
1704 DEFINE_CALLNONVIRTUALMETHODV(jdouble, Double, T_DOUBLE
1705 , HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1706 HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHODV_RETURN())
1707
1708 #define DEFINE_CALLNONVIRTUALMETHODA(ResultType, Result, Tag \
1709 , EntryProbe, ReturnProbe) \
1710 \
1711 DT_RETURN_MARK_DECL_FOR(Result, CallNonvirtual##Result##MethodA, ResultType \
1712 , ReturnProbe);\
1713 \
1714 JNI_ENTRY(ResultType, \
1715 jni_CallNonvirtual##Result##MethodA(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, const jvalue *args)) \
1716 JNIWrapper("CallNonvitual" XSTR(Result) "MethodA"); \
1717 \
1718 EntryProbe;\
1719 ResultType ret;\
1720 DT_RETURN_MARK_FOR(Result, CallNonvirtual##Result##MethodA, ResultType, \
1721 (const ResultType&)ret);\
1722 \
1723 JavaValue jvalue(Tag); \
1724 JNI_ArgumentPusherArray ap(methodID, args); \
1725 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_0); \
1726 ret = jvalue.get_##ResultType(); \
1727 return ret;\
1728 JNI_END
1729
1730 // the runtime type of subword integral basic types is integer
1731 DEFINE_CALLNONVIRTUALMETHODA(jboolean, Boolean, T_BOOLEAN
1732 , HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1733 HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHODA_RETURN(_ret_ref))
1734 DEFINE_CALLNONVIRTUALMETHODA(jbyte, Byte, T_BYTE
1735 , HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1736 HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHODA_RETURN(_ret_ref))
1737 DEFINE_CALLNONVIRTUALMETHODA(jchar, Char, T_CHAR
1738 , HOTSPOT_JNI_CALLNONVIRTUALCHARMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1739 HOTSPOT_JNI_CALLNONVIRTUALCHARMETHODA_RETURN(_ret_ref))
1740 DEFINE_CALLNONVIRTUALMETHODA(jshort, Short, T_SHORT
1741 , HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1742 HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHODA_RETURN(_ret_ref))
1743
1744 DEFINE_CALLNONVIRTUALMETHODA(jobject, Object, T_OBJECT
1745 , HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1746 HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHODA_RETURN(_ret_ref))
1747 DEFINE_CALLNONVIRTUALMETHODA(jint, Int, T_INT
1748 , HOTSPOT_JNI_CALLNONVIRTUALINTMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1749 HOTSPOT_JNI_CALLNONVIRTUALINTMETHODA_RETURN(_ret_ref))
1750 DEFINE_CALLNONVIRTUALMETHODA(jlong, Long, T_LONG
1751 , HOTSPOT_JNI_CALLNONVIRTUALLONGMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1752 // Float and double probes don't return value because dtrace doesn't currently support it
1753 HOTSPOT_JNI_CALLNONVIRTUALLONGMETHODA_RETURN(_ret_ref))
1754 DEFINE_CALLNONVIRTUALMETHODA(jfloat, Float, T_FLOAT
1755 , HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1756 HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHODA_RETURN())
1757 DEFINE_CALLNONVIRTUALMETHODA(jdouble, Double, T_DOUBLE
1758 , HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1759 HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHODA_RETURN())
1760
1761 DT_VOID_RETURN_MARK_DECL(CallNonvirtualVoidMethod
1762 , HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHOD_RETURN());
1763 DT_VOID_RETURN_MARK_DECL(CallNonvirtualVoidMethodV
1764 , HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHODV_RETURN());
1765 DT_VOID_RETURN_MARK_DECL(CallNonvirtualVoidMethodA
1766 , HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHODA_RETURN());
1767
1768 JNI_ENTRY(void, jni_CallNonvirtualVoidMethod(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, ...))
1769 JNIWrapper("CallNonvirtualVoidMethod");
1770
1771 HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHOD_ENTRY(env, obj, cls, (uintptr_t) methodID);
1772 DT_VOID_RETURN_MARK(CallNonvirtualVoidMethod);
1773
1774 va_list args;
1775 va_start(args, methodID);
1776 JavaValue jvalue(T_VOID);
1777 JNI_ArgumentPusherVaArg ap(methodID, args);
1778 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK);
1779 va_end(args);
1780 JNI_END
1781
1782
1783 JNI_ENTRY(void, jni_CallNonvirtualVoidMethodV(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, va_list args))
1784 JNIWrapper("CallNonvirtualVoidMethodV");
1785
1786 HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHODV_ENTRY(
1787 env, obj, cls, (uintptr_t) methodID);
1788 DT_VOID_RETURN_MARK(CallNonvirtualVoidMethodV);
1789
1790 JavaValue jvalue(T_VOID);
1791 JNI_ArgumentPusherVaArg ap(methodID, args);
1792 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK);
1793 JNI_END
1794
1795
1796 JNI_ENTRY(void, jni_CallNonvirtualVoidMethodA(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, const jvalue *args))
1797 JNIWrapper("CallNonvirtualVoidMethodA");
1798 HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHODA_ENTRY(
1799 env, obj, cls, (uintptr_t) methodID);
1800 DT_VOID_RETURN_MARK(CallNonvirtualVoidMethodA);
1801 JavaValue jvalue(T_VOID);
1802 JNI_ArgumentPusherArray ap(methodID, args);
1803 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK);
1804 JNI_END
1805
1806
1807
1808 #define DEFINE_CALLSTATICMETHOD(ResultType, Result, Tag \
1809 , EntryProbe, ResultProbe) \
1810 \
1811 DT_RETURN_MARK_DECL_FOR(Result, CallStatic##Result##Method, ResultType \
1812 , ResultProbe); \
1813 \
1814 JNI_ENTRY(ResultType, \
1815 jni_CallStatic##Result##Method(JNIEnv *env, jclass cls, jmethodID methodID, ...)) \
1816 JNIWrapper("CallStatic" XSTR(Result) "Method"); \
1817 \
1818 EntryProbe; \
1819 ResultType ret = 0;\
1820 DT_RETURN_MARK_FOR(Result, CallStatic##Result##Method, ResultType, \
1821 (const ResultType&)ret);\
1822 \
1823 va_list args; \
1824 va_start(args, methodID); \
1825 JavaValue jvalue(Tag); \
1826 JNI_ArgumentPusherVaArg ap(methodID, args); \
1827 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK_0); \
1828 va_end(args); \
1829 ret = jvalue.get_##ResultType(); \
1830 return ret;\
1831 JNI_END
1832
1833 // the runtime type of subword integral basic types is integer
1834 DEFINE_CALLSTATICMETHOD(jboolean, Boolean, T_BOOLEAN
1835 , HOTSPOT_JNI_CALLSTATICBOOLEANMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1836 HOTSPOT_JNI_CALLSTATICBOOLEANMETHOD_RETURN(_ret_ref));
1837 DEFINE_CALLSTATICMETHOD(jbyte, Byte, T_BYTE
1838 , HOTSPOT_JNI_CALLSTATICBYTEMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1839 HOTSPOT_JNI_CALLSTATICBYTEMETHOD_RETURN(_ret_ref));
1840 DEFINE_CALLSTATICMETHOD(jchar, Char, T_CHAR
1841 , HOTSPOT_JNI_CALLSTATICCHARMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1842 HOTSPOT_JNI_CALLSTATICCHARMETHOD_RETURN(_ret_ref));
1843 DEFINE_CALLSTATICMETHOD(jshort, Short, T_SHORT
1844 , HOTSPOT_JNI_CALLSTATICSHORTMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1845 HOTSPOT_JNI_CALLSTATICSHORTMETHOD_RETURN(_ret_ref));
1846
1847 DEFINE_CALLSTATICMETHOD(jobject, Object, T_OBJECT
1848 , HOTSPOT_JNI_CALLSTATICOBJECTMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1849 HOTSPOT_JNI_CALLSTATICOBJECTMETHOD_RETURN(_ret_ref));
1850 DEFINE_CALLSTATICMETHOD(jint, Int, T_INT
1851 , HOTSPOT_JNI_CALLSTATICINTMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1852 HOTSPOT_JNI_CALLSTATICINTMETHOD_RETURN(_ret_ref));
1853 DEFINE_CALLSTATICMETHOD(jlong, Long, T_LONG
1854 , HOTSPOT_JNI_CALLSTATICLONGMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1855 HOTSPOT_JNI_CALLSTATICLONGMETHOD_RETURN(_ret_ref));
1856 // Float and double probes don't return value because dtrace doesn't currently support it
1857 DEFINE_CALLSTATICMETHOD(jfloat, Float, T_FLOAT
1858 , HOTSPOT_JNI_CALLSTATICFLOATMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1859 HOTSPOT_JNI_CALLSTATICFLOATMETHOD_RETURN());
1860 DEFINE_CALLSTATICMETHOD(jdouble, Double, T_DOUBLE
1861 , HOTSPOT_JNI_CALLSTATICDOUBLEMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1862 HOTSPOT_JNI_CALLSTATICDOUBLEMETHOD_RETURN());
1863
1864 #define DEFINE_CALLSTATICMETHODV(ResultType, Result, Tag \
1865 , EntryProbe, ResultProbe) \
1866 \
1867 DT_RETURN_MARK_DECL_FOR(Result, CallStatic##Result##MethodV, ResultType \
1868 , ResultProbe); \
1869 \
1870 JNI_ENTRY(ResultType, \
1871 jni_CallStatic##Result##MethodV(JNIEnv *env, jclass cls, jmethodID methodID, va_list args)) \
1872 JNIWrapper("CallStatic" XSTR(Result) "MethodV"); \
1873 \
1874 EntryProbe; \
1875 ResultType ret = 0;\
1876 DT_RETURN_MARK_FOR(Result, CallStatic##Result##MethodV, ResultType, \
1877 (const ResultType&)ret);\
1878 \
1879 JavaValue jvalue(Tag); \
1880 JNI_ArgumentPusherVaArg ap(methodID, args); \
1881 /* Make sure class is initialized before trying to invoke its method */ \
1882 KlassHandle k(THREAD, java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls))); \
1883 k()->initialize(CHECK_0); \
1884 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK_0); \
1885 va_end(args); \
1886 ret = jvalue.get_##ResultType(); \
1887 return ret;\
1888 JNI_END
1889
1890 // the runtime type of subword integral basic types is integer
1891 DEFINE_CALLSTATICMETHODV(jboolean, Boolean, T_BOOLEAN
1892 , HOTSPOT_JNI_CALLSTATICBOOLEANMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1893 HOTSPOT_JNI_CALLSTATICBOOLEANMETHODV_RETURN(_ret_ref));
1894 DEFINE_CALLSTATICMETHODV(jbyte, Byte, T_BYTE
1895 , HOTSPOT_JNI_CALLSTATICBYTEMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1896 HOTSPOT_JNI_CALLSTATICBYTEMETHODV_RETURN(_ret_ref));
1897 DEFINE_CALLSTATICMETHODV(jchar, Char, T_CHAR
1898 , HOTSPOT_JNI_CALLSTATICCHARMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1899 HOTSPOT_JNI_CALLSTATICCHARMETHODV_RETURN(_ret_ref));
1900 DEFINE_CALLSTATICMETHODV(jshort, Short, T_SHORT
1901 , HOTSPOT_JNI_CALLSTATICSHORTMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1902 HOTSPOT_JNI_CALLSTATICSHORTMETHODV_RETURN(_ret_ref));
1903
1904 DEFINE_CALLSTATICMETHODV(jobject, Object, T_OBJECT
1905 , HOTSPOT_JNI_CALLSTATICOBJECTMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1906 HOTSPOT_JNI_CALLSTATICOBJECTMETHODV_RETURN(_ret_ref));
1907 DEFINE_CALLSTATICMETHODV(jint, Int, T_INT
1908 , HOTSPOT_JNI_CALLSTATICINTMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1909 HOTSPOT_JNI_CALLSTATICINTMETHODV_RETURN(_ret_ref));
1910 DEFINE_CALLSTATICMETHODV(jlong, Long, T_LONG
1911 , HOTSPOT_JNI_CALLSTATICLONGMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1912 HOTSPOT_JNI_CALLSTATICLONGMETHODV_RETURN(_ret_ref));
1913 // Float and double probes don't return value because dtrace doesn't currently support it
1914 DEFINE_CALLSTATICMETHODV(jfloat, Float, T_FLOAT
1915 , HOTSPOT_JNI_CALLSTATICFLOATMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1916 HOTSPOT_JNI_CALLSTATICFLOATMETHODV_RETURN());
1917 DEFINE_CALLSTATICMETHODV(jdouble, Double, T_DOUBLE
1918 , HOTSPOT_JNI_CALLSTATICDOUBLEMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1919 HOTSPOT_JNI_CALLSTATICDOUBLEMETHODV_RETURN());
1920
1921 #define DEFINE_CALLSTATICMETHODA(ResultType, Result, Tag \
1922 , EntryProbe, ResultProbe) \
1923 \
1924 DT_RETURN_MARK_DECL_FOR(Result, CallStatic##Result##MethodA, ResultType \
1925 , ResultProbe); \
1926 \
1927 JNI_ENTRY(ResultType, \
1928 jni_CallStatic##Result##MethodA(JNIEnv *env, jclass cls, jmethodID methodID, const jvalue *args)) \
1929 JNIWrapper("CallStatic" XSTR(Result) "MethodA"); \
1930 \
1931 EntryProbe; \
1932 ResultType ret = 0;\
1933 DT_RETURN_MARK_FOR(Result, CallStatic##Result##MethodA, ResultType, \
1934 (const ResultType&)ret);\
1935 \
1936 JavaValue jvalue(Tag); \
1937 JNI_ArgumentPusherArray ap(methodID, args); \
1938 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK_0); \
1939 ret = jvalue.get_##ResultType(); \
1940 return ret;\
1941 JNI_END
1942
1943 // the runtime type of subword integral basic types is integer
1944 DEFINE_CALLSTATICMETHODA(jboolean, Boolean, T_BOOLEAN
1945 , HOTSPOT_JNI_CALLSTATICBOOLEANMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1946 HOTSPOT_JNI_CALLSTATICBOOLEANMETHODA_RETURN(_ret_ref));
1947 DEFINE_CALLSTATICMETHODA(jbyte, Byte, T_BYTE
1948 , HOTSPOT_JNI_CALLSTATICBYTEMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1949 HOTSPOT_JNI_CALLSTATICBYTEMETHODA_RETURN(_ret_ref));
1950 DEFINE_CALLSTATICMETHODA(jchar, Char, T_CHAR
1951 , HOTSPOT_JNI_CALLSTATICCHARMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1952 HOTSPOT_JNI_CALLSTATICCHARMETHODA_RETURN(_ret_ref));
1953 DEFINE_CALLSTATICMETHODA(jshort, Short, T_SHORT
1954 , HOTSPOT_JNI_CALLSTATICSHORTMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1955 HOTSPOT_JNI_CALLSTATICSHORTMETHODA_RETURN(_ret_ref));
1956
1957 DEFINE_CALLSTATICMETHODA(jobject, Object, T_OBJECT
1958 , HOTSPOT_JNI_CALLSTATICOBJECTMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1959 HOTSPOT_JNI_CALLSTATICOBJECTMETHODA_RETURN(_ret_ref));
1960 DEFINE_CALLSTATICMETHODA(jint, Int, T_INT
1961 , HOTSPOT_JNI_CALLSTATICINTMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1962 HOTSPOT_JNI_CALLSTATICINTMETHODA_RETURN(_ret_ref));
1963 DEFINE_CALLSTATICMETHODA(jlong, Long, T_LONG
1964 , HOTSPOT_JNI_CALLSTATICLONGMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1965 HOTSPOT_JNI_CALLSTATICLONGMETHODA_RETURN(_ret_ref));
1966 // Float and double probes don't return value because dtrace doesn't currently support it
1967 DEFINE_CALLSTATICMETHODA(jfloat, Float, T_FLOAT
1968 , HOTSPOT_JNI_CALLSTATICFLOATMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1969 HOTSPOT_JNI_CALLSTATICFLOATMETHODA_RETURN());
1970 DEFINE_CALLSTATICMETHODA(jdouble, Double, T_DOUBLE
1971 , HOTSPOT_JNI_CALLSTATICDOUBLEMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1972 HOTSPOT_JNI_CALLSTATICDOUBLEMETHODA_RETURN());
1973
1974 DT_VOID_RETURN_MARK_DECL(CallStaticVoidMethod
1975 , HOTSPOT_JNI_CALLSTATICVOIDMETHOD_RETURN());
1976 DT_VOID_RETURN_MARK_DECL(CallStaticVoidMethodV
1977 , HOTSPOT_JNI_CALLSTATICVOIDMETHODV_RETURN());
1978 DT_VOID_RETURN_MARK_DECL(CallStaticVoidMethodA
1979 , HOTSPOT_JNI_CALLSTATICVOIDMETHODA_RETURN());
1980
1981 JNI_ENTRY(void, jni_CallStaticVoidMethod(JNIEnv *env, jclass cls, jmethodID methodID, ...))
1982 JNIWrapper("CallStaticVoidMethod");
1983 HOTSPOT_JNI_CALLSTATICVOIDMETHOD_ENTRY(env, cls, (uintptr_t) methodID);
1984 DT_VOID_RETURN_MARK(CallStaticVoidMethod);
1985
1986 va_list args;
1987 va_start(args, methodID);
1988 JavaValue jvalue(T_VOID);
1989 JNI_ArgumentPusherVaArg ap(methodID, args);
1990 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK);
1991 va_end(args);
1992 JNI_END
1993
1994
1995 JNI_ENTRY(void, jni_CallStaticVoidMethodV(JNIEnv *env, jclass cls, jmethodID methodID, va_list args))
1996 JNIWrapper("CallStaticVoidMethodV");
1997 HOTSPOT_JNI_CALLSTATICVOIDMETHODV_ENTRY(env, cls, (uintptr_t) methodID);
1998 DT_VOID_RETURN_MARK(CallStaticVoidMethodV);
1999
2000 JavaValue jvalue(T_VOID);
2001 JNI_ArgumentPusherVaArg ap(methodID, args);
2002 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK);
2003 JNI_END
2004
2005
2006 JNI_ENTRY(void, jni_CallStaticVoidMethodA(JNIEnv *env, jclass cls, jmethodID methodID, const jvalue *args))
2007 JNIWrapper("CallStaticVoidMethodA");
2008 HOTSPOT_JNI_CALLSTATICVOIDMETHODA_ENTRY(env, cls, (uintptr_t) methodID);
2009 DT_VOID_RETURN_MARK(CallStaticVoidMethodA);
2010
2011 JavaValue jvalue(T_VOID);
2012 JNI_ArgumentPusherArray ap(methodID, args);
2013 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK);
2014 JNI_END
2015
2016
2017 //
2018 // Accessing Fields
2019 //
2020
2021
2022 DT_RETURN_MARK_DECL(GetFieldID, jfieldID
2023 , HOTSPOT_JNI_GETFIELDID_RETURN((uintptr_t)_ret_ref));
2024
2025 JNI_ENTRY(jfieldID, jni_GetFieldID(JNIEnv *env, jclass clazz,
2026 const char *name, const char *sig))
2027 JNIWrapper("GetFieldID");
2028 HOTSPOT_JNI_GETFIELDID_ENTRY(env, clazz, (char *) name, (char *) sig);
2029 jfieldID ret = 0;
2030 DT_RETURN_MARK(GetFieldID, jfieldID, (const jfieldID&)ret);
2031
2032 // The class should have been loaded (we have an instance of the class
2033 // passed in) so the field and signature should already be in the symbol
2034 // table. If they're not there, the field doesn't exist.
2035 TempNewSymbol fieldname = SymbolTable::probe(name, (int)strlen(name));
2036 TempNewSymbol signame = SymbolTable::probe(sig, (int)strlen(sig));
2037 if (fieldname == NULL || signame == NULL) {
2038 THROW_MSG_0(vmSymbols::java_lang_NoSuchFieldError(), (char*) name);
2039 }
2040 KlassHandle k(THREAD,
2041 java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz)));
2042 // Make sure class is initialized before handing id's out to fields
2043 k()->initialize(CHECK_NULL);
2044
2045 fieldDescriptor fd;
2046 if (!k()->is_instance_klass() ||
2047 !InstanceKlass::cast(k())->find_field(fieldname, signame, false, &fd)) {
2048 THROW_MSG_0(vmSymbols::java_lang_NoSuchFieldError(), (char*) name);
2049 }
2050
2051 // A jfieldID for a non-static field is simply the offset of the field within the instanceOop
2052 // It may also have hash bits for k, if VerifyJNIFields is turned on.
2053 ret = jfieldIDWorkaround::to_instance_jfieldID(k(), fd.offset());
2054 return ret;
2055 JNI_END
2056
2057
2058 JNI_ENTRY(jobject, jni_GetObjectField(JNIEnv *env, jobject obj, jfieldID fieldID))
2059 JNIWrapper("GetObjectField");
2060 HOTSPOT_JNI_GETOBJECTFIELD_ENTRY(env, obj, (uintptr_t) fieldID);
2061 oop o = JNIHandles::resolve_non_null(obj);
2062 Klass* k = o->klass();
2063 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID);
2064 // Keep JVMTI addition small and only check enabled flag here.
2065 // jni_GetField_probe() assumes that is okay to create handles.
2066 if (JvmtiExport::should_post_field_access()) {
2067 o = JvmtiExport::jni_GetField_probe(thread, obj, o, k, fieldID, false);
2068 }
2069 jobject ret = JNIHandles::make_local(env, o->obj_field(offset));
2070 #if INCLUDE_ALL_GCS
2071 // If G1 is enabled and we are accessing the value of the referent
2072 // field in a reference object then we need to register a non-null
2073 // referent with the SATB barrier.
2074 if (UseG1GC) {
2075 bool needs_barrier = false;
2076
2077 if (ret != NULL &&
2078 offset == java_lang_ref_Reference::referent_offset &&
2079 InstanceKlass::cast(k)->reference_type() != REF_NONE) {
2080 assert(InstanceKlass::cast(k)->is_subclass_of(SystemDictionary::Reference_klass()), "sanity");
2081 needs_barrier = true;
2082 }
2083
2084 if (needs_barrier) {
2085 oop referent = JNIHandles::resolve(ret);
2086 G1SATBCardTableModRefBS::enqueue(referent);
2087 }
2088 }
2089 #endif // INCLUDE_ALL_GCS
2090 HOTSPOT_JNI_GETOBJECTFIELD_RETURN(ret);
2091 return ret;
2092 JNI_END
2093
2094
2095
2096 #define DEFINE_GETFIELD(Return,Fieldname,Result \
2097 , EntryProbe, ReturnProbe) \
2098 \
2099 DT_RETURN_MARK_DECL_FOR(Result, Get##Result##Field, Return \
2100 , ReturnProbe); \
2101 \
2102 JNI_QUICK_ENTRY(Return, jni_Get##Result##Field(JNIEnv *env, jobject obj, jfieldID fieldID)) \
2103 JNIWrapper("Get" XSTR(Result) "Field"); \
2104 \
2105 EntryProbe; \
2106 Return ret = 0;\
2107 DT_RETURN_MARK_FOR(Result, Get##Result##Field, Return, (const Return&)ret);\
2108 \
2109 oop o = JNIHandles::resolve_non_null(obj); \
2110 Klass* k = o->klass(); \
2111 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID); \
2112 /* Keep JVMTI addition small and only check enabled flag here. */ \
2113 /* jni_GetField_probe_nh() assumes that is not okay to create handles */ \
2114 /* and creates a ResetNoHandleMark. */ \
2115 if (JvmtiExport::should_post_field_access()) { \
2116 o = JvmtiExport::jni_GetField_probe_nh(thread, obj, o, k, fieldID, false); \
2117 } \
2118 ret = o->Fieldname##_field(offset); \
2119 return ret; \
2120 JNI_END
2121
2122 DEFINE_GETFIELD(jboolean, bool, Boolean
2123 , HOTSPOT_JNI_GETBOOLEANFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2124 HOTSPOT_JNI_GETBOOLEANFIELD_RETURN(_ret_ref))
2125 DEFINE_GETFIELD(jbyte, byte, Byte
2126 , HOTSPOT_JNI_GETBYTEFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2127 HOTSPOT_JNI_GETBYTEFIELD_RETURN(_ret_ref))
2128 DEFINE_GETFIELD(jchar, char, Char
2129 , HOTSPOT_JNI_GETCHARFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2130 HOTSPOT_JNI_GETCHARFIELD_RETURN(_ret_ref))
2131 DEFINE_GETFIELD(jshort, short, Short
2132 , HOTSPOT_JNI_GETSHORTFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2133 HOTSPOT_JNI_GETSHORTFIELD_RETURN(_ret_ref))
2134 DEFINE_GETFIELD(jint, int, Int
2135 , HOTSPOT_JNI_GETINTFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2136 HOTSPOT_JNI_GETINTFIELD_RETURN(_ret_ref))
2137 DEFINE_GETFIELD(jlong, long, Long
2138 , HOTSPOT_JNI_GETLONGFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2139 HOTSPOT_JNI_GETLONGFIELD_RETURN(_ret_ref))
2140 // Float and double probes don't return value because dtrace doesn't currently support it
2141 DEFINE_GETFIELD(jfloat, float, Float
2142 , HOTSPOT_JNI_GETFLOATFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2143 HOTSPOT_JNI_GETFLOATFIELD_RETURN())
2144 DEFINE_GETFIELD(jdouble, double, Double
2145 , HOTSPOT_JNI_GETDOUBLEFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2146 HOTSPOT_JNI_GETDOUBLEFIELD_RETURN())
2147
2148 address jni_GetBooleanField_addr() {
2149 return (address)jni_GetBooleanField;
2150 }
2151 address jni_GetByteField_addr() {
2152 return (address)jni_GetByteField;
2153 }
2154 address jni_GetCharField_addr() {
2155 return (address)jni_GetCharField;
2156 }
2157 address jni_GetShortField_addr() {
2158 return (address)jni_GetShortField;
2159 }
2160 address jni_GetIntField_addr() {
2161 return (address)jni_GetIntField;
2162 }
2163 address jni_GetLongField_addr() {
2164 return (address)jni_GetLongField;
2165 }
2166 address jni_GetFloatField_addr() {
2167 return (address)jni_GetFloatField;
2168 }
2169 address jni_GetDoubleField_addr() {
2170 return (address)jni_GetDoubleField;
2171 }
2172
2173 JNI_QUICK_ENTRY(void, jni_SetObjectField(JNIEnv *env, jobject obj, jfieldID fieldID, jobject value))
2174 JNIWrapper("SetObjectField");
2175 HOTSPOT_JNI_SETOBJECTFIELD_ENTRY(env, obj, (uintptr_t) fieldID, value);
2176 oop o = JNIHandles::resolve_non_null(obj);
2177 Klass* k = o->klass();
2178 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID);
2179 // Keep JVMTI addition small and only check enabled flag here.
2180 // jni_SetField_probe_nh() assumes that is not okay to create handles
2181 // and creates a ResetNoHandleMark.
2182 if (JvmtiExport::should_post_field_modification()) {
2183 jvalue field_value;
2184 field_value.l = value;
2185 o = JvmtiExport::jni_SetField_probe_nh(thread, obj, o, k, fieldID, false, 'L', (jvalue *)&field_value);
2186 }
2187 o->obj_field_put(offset, JNIHandles::resolve(value));
2188 HOTSPOT_JNI_SETOBJECTFIELD_RETURN();
2189 JNI_END
2190
2191
2192 #define DEFINE_SETFIELD(Argument,Fieldname,Result,SigType,unionType \
2193 , EntryProbe, ReturnProbe) \
2194 \
2195 JNI_QUICK_ENTRY(void, jni_Set##Result##Field(JNIEnv *env, jobject obj, jfieldID fieldID, Argument value)) \
2196 JNIWrapper("Set" XSTR(Result) "Field"); \
2197 \
2198 EntryProbe; \
2199 \
2200 oop o = JNIHandles::resolve_non_null(obj); \
2201 Klass* k = o->klass(); \
2202 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID); \
2203 /* Keep JVMTI addition small and only check enabled flag here. */ \
2204 /* jni_SetField_probe_nh() assumes that is not okay to create handles */ \
2205 /* and creates a ResetNoHandleMark. */ \
2206 if (JvmtiExport::should_post_field_modification()) { \
2207 jvalue field_value; \
2208 field_value.unionType = value; \
2209 o = JvmtiExport::jni_SetField_probe_nh(thread, obj, o, k, fieldID, false, SigType, (jvalue *)&field_value); \
2210 } \
2211 if (SigType == 'Z') { value = ((jboolean)value) & 1; } \
2212 o->Fieldname##_field_put(offset, value); \
2213 ReturnProbe; \
2214 JNI_END
2215
2216 DEFINE_SETFIELD(jboolean, bool, Boolean, 'Z', z
2217 , HOTSPOT_JNI_SETBOOLEANFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value),
2218 HOTSPOT_JNI_SETBOOLEANFIELD_RETURN())
2219 DEFINE_SETFIELD(jbyte, byte, Byte, 'B', b
2220 , HOTSPOT_JNI_SETBYTEFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value),
2221 HOTSPOT_JNI_SETBYTEFIELD_RETURN())
2222 DEFINE_SETFIELD(jchar, char, Char, 'C', c
2223 , HOTSPOT_JNI_SETCHARFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value),
2224 HOTSPOT_JNI_SETCHARFIELD_RETURN())
2225 DEFINE_SETFIELD(jshort, short, Short, 'S', s
2226 , HOTSPOT_JNI_SETSHORTFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value),
2227 HOTSPOT_JNI_SETSHORTFIELD_RETURN())
2228 DEFINE_SETFIELD(jint, int, Int, 'I', i
2229 , HOTSPOT_JNI_SETINTFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value),
2230 HOTSPOT_JNI_SETINTFIELD_RETURN())
2231 DEFINE_SETFIELD(jlong, long, Long, 'J', j
2232 , HOTSPOT_JNI_SETLONGFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value),
2233 HOTSPOT_JNI_SETLONGFIELD_RETURN())
2234 // Float and double probes don't return value because dtrace doesn't currently support it
2235 DEFINE_SETFIELD(jfloat, float, Float, 'F', f
2236 , HOTSPOT_JNI_SETFLOATFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2237 HOTSPOT_JNI_SETFLOATFIELD_RETURN())
2238 DEFINE_SETFIELD(jdouble, double, Double, 'D', d
2239 , HOTSPOT_JNI_SETDOUBLEFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2240 HOTSPOT_JNI_SETDOUBLEFIELD_RETURN())
2241
2242 DT_RETURN_MARK_DECL(ToReflectedField, jobject
2243 , HOTSPOT_JNI_TOREFLECTEDFIELD_RETURN(_ret_ref));
2244
2245 JNI_ENTRY(jobject, jni_ToReflectedField(JNIEnv *env, jclass cls, jfieldID fieldID, jboolean isStatic))
2246 JNIWrapper("ToReflectedField");
2247 HOTSPOT_JNI_TOREFLECTEDFIELD_ENTRY(env, cls, (uintptr_t) fieldID, isStatic);
2248 jobject ret = NULL;
2249 DT_RETURN_MARK(ToReflectedField, jobject, (const jobject&)ret);
2250
2251 fieldDescriptor fd;
2252 bool found = false;
2253 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2254
2255 assert(jfieldIDWorkaround::is_static_jfieldID(fieldID) == (isStatic != 0), "invalid fieldID");
2256
2257 if (isStatic) {
2258 // Static field. The fieldID a JNIid specifying the field holder and the offset within the Klass*.
2259 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID);
2260 assert(id->is_static_field_id(), "invalid static field id");
2261 found = id->find_local_field(&fd);
2262 } else {
2263 // Non-static field. The fieldID is really the offset of the field within the instanceOop.
2264 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID);
2265 found = InstanceKlass::cast(k)->find_field_from_offset(offset, false, &fd);
2266 }
2267 assert(found, "bad fieldID passed into jni_ToReflectedField");
2268 oop reflected = Reflection::new_field(&fd, CHECK_NULL);
2269 ret = JNIHandles::make_local(env, reflected);
2270 return ret;
2271 JNI_END
2272
2273
2274 //
2275 // Accessing Static Fields
2276 //
2277 DT_RETURN_MARK_DECL(GetStaticFieldID, jfieldID
2278 , HOTSPOT_JNI_GETSTATICFIELDID_RETURN((uintptr_t)_ret_ref));
2279
2280 JNI_ENTRY(jfieldID, jni_GetStaticFieldID(JNIEnv *env, jclass clazz,
2281 const char *name, const char *sig))
2282 JNIWrapper("GetStaticFieldID");
2283 HOTSPOT_JNI_GETSTATICFIELDID_ENTRY(env, clazz, (char *) name, (char *) sig);
2284 jfieldID ret = NULL;
2285 DT_RETURN_MARK(GetStaticFieldID, jfieldID, (const jfieldID&)ret);
2286
2287 // The class should have been loaded (we have an instance of the class
2288 // passed in) so the field and signature should already be in the symbol
2289 // table. If they're not there, the field doesn't exist.
2290 TempNewSymbol fieldname = SymbolTable::probe(name, (int)strlen(name));
2291 TempNewSymbol signame = SymbolTable::probe(sig, (int)strlen(sig));
2292 if (fieldname == NULL || signame == NULL) {
2293 THROW_MSG_0(vmSymbols::java_lang_NoSuchFieldError(), (char*) name);
2294 }
2295 KlassHandle k(THREAD,
2296 java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz)));
2297 // Make sure class is initialized before handing id's out to static fields
2298 k()->initialize(CHECK_NULL);
2299
2300 fieldDescriptor fd;
2301 if (!k()->is_instance_klass() ||
2302 !InstanceKlass::cast(k())->find_field(fieldname, signame, true, &fd)) {
2303 THROW_MSG_0(vmSymbols::java_lang_NoSuchFieldError(), (char*) name);
2304 }
2305
2306 // A jfieldID for a static field is a JNIid specifying the field holder and the offset within the Klass*
2307 JNIid* id = fd.field_holder()->jni_id_for(fd.offset());
2308 debug_only(id->set_is_static_field_id();)
2309
2310 debug_only(id->verify(fd.field_holder()));
2311
2312 ret = jfieldIDWorkaround::to_static_jfieldID(id);
2313 return ret;
2314 JNI_END
2315
2316
2317 JNI_ENTRY(jobject, jni_GetStaticObjectField(JNIEnv *env, jclass clazz, jfieldID fieldID))
2318 JNIWrapper("GetStaticObjectField");
2319 HOTSPOT_JNI_GETSTATICOBJECTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID);
2320 #if INCLUDE_JNI_CHECK
2321 DEBUG_ONLY(Klass* param_k = jniCheck::validate_class(thread, clazz);)
2322 #endif // INCLUDE_JNI_CHECK
2323 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID);
2324 assert(id->is_static_field_id(), "invalid static field id");
2325 // Keep JVMTI addition small and only check enabled flag here.
2326 // jni_GetField_probe() assumes that is okay to create handles.
2327 if (JvmtiExport::should_post_field_access()) {
2328 JvmtiExport::jni_GetField_probe(thread, NULL, NULL, id->holder(), fieldID, true);
2329 }
2330 jobject ret = JNIHandles::make_local(id->holder()->java_mirror()->obj_field(id->offset()));
2331 HOTSPOT_JNI_GETSTATICOBJECTFIELD_RETURN(ret);
2332 return ret;
2333 JNI_END
2334
2335
2336 #define DEFINE_GETSTATICFIELD(Return,Fieldname,Result \
2337 , EntryProbe, ReturnProbe) \
2338 \
2339 DT_RETURN_MARK_DECL_FOR(Result, GetStatic##Result##Field, Return \
2340 , ReturnProbe); \
2341 \
2342 JNI_ENTRY(Return, jni_GetStatic##Result##Field(JNIEnv *env, jclass clazz, jfieldID fieldID)) \
2343 JNIWrapper("GetStatic" XSTR(Result) "Field"); \
2344 EntryProbe; \
2345 Return ret = 0;\
2346 DT_RETURN_MARK_FOR(Result, GetStatic##Result##Field, Return, \
2347 (const Return&)ret);\
2348 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID); \
2349 assert(id->is_static_field_id(), "invalid static field id"); \
2350 /* Keep JVMTI addition small and only check enabled flag here. */ \
2351 /* jni_GetField_probe() assumes that is okay to create handles. */ \
2352 if (JvmtiExport::should_post_field_access()) { \
2353 JvmtiExport::jni_GetField_probe(thread, NULL, NULL, id->holder(), fieldID, true); \
2354 } \
2355 ret = id->holder()->java_mirror()-> Fieldname##_field (id->offset()); \
2356 return ret;\
2357 JNI_END
2358
2359 DEFINE_GETSTATICFIELD(jboolean, bool, Boolean
2360 , HOTSPOT_JNI_GETSTATICBOOLEANFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICBOOLEANFIELD_RETURN(_ret_ref))
2361 DEFINE_GETSTATICFIELD(jbyte, byte, Byte
2362 , HOTSPOT_JNI_GETSTATICBYTEFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICBYTEFIELD_RETURN(_ret_ref) )
2363 DEFINE_GETSTATICFIELD(jchar, char, Char
2364 , HOTSPOT_JNI_GETSTATICCHARFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICCHARFIELD_RETURN(_ret_ref) )
2365 DEFINE_GETSTATICFIELD(jshort, short, Short
2366 , HOTSPOT_JNI_GETSTATICSHORTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICSHORTFIELD_RETURN(_ret_ref) )
2367 DEFINE_GETSTATICFIELD(jint, int, Int
2368 , HOTSPOT_JNI_GETSTATICINTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICINTFIELD_RETURN(_ret_ref) )
2369 DEFINE_GETSTATICFIELD(jlong, long, Long
2370 , HOTSPOT_JNI_GETSTATICLONGFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICLONGFIELD_RETURN(_ret_ref) )
2371 // Float and double probes don't return value because dtrace doesn't currently support it
2372 DEFINE_GETSTATICFIELD(jfloat, float, Float
2373 , HOTSPOT_JNI_GETSTATICFLOATFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICFLOATFIELD_RETURN() )
2374 DEFINE_GETSTATICFIELD(jdouble, double, Double
2375 , HOTSPOT_JNI_GETSTATICDOUBLEFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICDOUBLEFIELD_RETURN() )
2376
2377 JNI_ENTRY(void, jni_SetStaticObjectField(JNIEnv *env, jclass clazz, jfieldID fieldID, jobject value))
2378 JNIWrapper("SetStaticObjectField");
2379 HOTSPOT_JNI_SETSTATICOBJECTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value);
2380 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID);
2381 assert(id->is_static_field_id(), "invalid static field id");
2382 // Keep JVMTI addition small and only check enabled flag here.
2383 // jni_SetField_probe() assumes that is okay to create handles.
2384 if (JvmtiExport::should_post_field_modification()) {
2385 jvalue field_value;
2386 field_value.l = value;
2387 JvmtiExport::jni_SetField_probe(thread, NULL, NULL, id->holder(), fieldID, true, 'L', (jvalue *)&field_value);
2388 }
2389 id->holder()->java_mirror()->obj_field_put(id->offset(), JNIHandles::resolve(value));
2390 HOTSPOT_JNI_SETSTATICOBJECTFIELD_RETURN();
2391 JNI_END
2392
2393
2394
2395 #define DEFINE_SETSTATICFIELD(Argument,Fieldname,Result,SigType,unionType \
2396 , EntryProbe, ReturnProbe) \
2397 \
2398 JNI_ENTRY(void, jni_SetStatic##Result##Field(JNIEnv *env, jclass clazz, jfieldID fieldID, Argument value)) \
2399 JNIWrapper("SetStatic" XSTR(Result) "Field"); \
2400 EntryProbe; \
2401 \
2402 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID); \
2403 assert(id->is_static_field_id(), "invalid static field id"); \
2404 /* Keep JVMTI addition small and only check enabled flag here. */ \
2405 /* jni_SetField_probe() assumes that is okay to create handles. */ \
2406 if (JvmtiExport::should_post_field_modification()) { \
2407 jvalue field_value; \
2408 field_value.unionType = value; \
2409 JvmtiExport::jni_SetField_probe(thread, NULL, NULL, id->holder(), fieldID, true, SigType, (jvalue *)&field_value); \
2410 } \
2411 if (SigType == 'Z') { value = ((jboolean)value) & 1; } \
2412 id->holder()->java_mirror()-> Fieldname##_field_put (id->offset(), value); \
2413 ReturnProbe;\
2414 JNI_END
2415
2416 DEFINE_SETSTATICFIELD(jboolean, bool, Boolean, 'Z', z
2417 , HOTSPOT_JNI_SETSTATICBOOLEANFIELD_ENTRY(env, clazz, (uintptr_t)fieldID, value),
2418 HOTSPOT_JNI_SETSTATICBOOLEANFIELD_RETURN())
2419 DEFINE_SETSTATICFIELD(jbyte, byte, Byte, 'B', b
2420 , HOTSPOT_JNI_SETSTATICBYTEFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value),
2421 HOTSPOT_JNI_SETSTATICBYTEFIELD_RETURN())
2422 DEFINE_SETSTATICFIELD(jchar, char, Char, 'C', c
2423 , HOTSPOT_JNI_SETSTATICCHARFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value),
2424 HOTSPOT_JNI_SETSTATICCHARFIELD_RETURN())
2425 DEFINE_SETSTATICFIELD(jshort, short, Short, 'S', s
2426 , HOTSPOT_JNI_SETSTATICSHORTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value),
2427 HOTSPOT_JNI_SETSTATICSHORTFIELD_RETURN())
2428 DEFINE_SETSTATICFIELD(jint, int, Int, 'I', i
2429 , HOTSPOT_JNI_SETSTATICINTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value),
2430 HOTSPOT_JNI_SETSTATICINTFIELD_RETURN())
2431 DEFINE_SETSTATICFIELD(jlong, long, Long, 'J', j
2432 , HOTSPOT_JNI_SETSTATICLONGFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value),
2433 HOTSPOT_JNI_SETSTATICLONGFIELD_RETURN())
2434 // Float and double probes don't return value because dtrace doesn't currently support it
2435 DEFINE_SETSTATICFIELD(jfloat, float, Float, 'F', f
2436 , HOTSPOT_JNI_SETSTATICFLOATFIELD_ENTRY(env, clazz, (uintptr_t) fieldID),
2437 HOTSPOT_JNI_SETSTATICFLOATFIELD_RETURN())
2438 DEFINE_SETSTATICFIELD(jdouble, double, Double, 'D', d
2439 , HOTSPOT_JNI_SETSTATICDOUBLEFIELD_ENTRY(env, clazz, (uintptr_t) fieldID),
2440 HOTSPOT_JNI_SETSTATICDOUBLEFIELD_RETURN())
2441
2442 //
2443 // String Operations
2444 //
2445
2446 // Unicode Interface
2447
2448 DT_RETURN_MARK_DECL(NewString, jstring
2449 , HOTSPOT_JNI_NEWSTRING_RETURN(_ret_ref));
2450
2451 JNI_ENTRY(jstring, jni_NewString(JNIEnv *env, const jchar *unicodeChars, jsize len))
2452 JNIWrapper("NewString");
2453 HOTSPOT_JNI_NEWSTRING_ENTRY(env, (uint16_t *) unicodeChars, len);
2454 jstring ret = NULL;
2455 DT_RETURN_MARK(NewString, jstring, (const jstring&)ret);
2456 oop string=java_lang_String::create_oop_from_unicode((jchar*) unicodeChars, len, CHECK_NULL);
2457 ret = (jstring) JNIHandles::make_local(env, string);
2458 return ret;
2459 JNI_END
2460
2461
2462 JNI_QUICK_ENTRY(jsize, jni_GetStringLength(JNIEnv *env, jstring string))
2463 JNIWrapper("GetStringLength");
2464 HOTSPOT_JNI_GETSTRINGLENGTH_ENTRY(env, string);
2465 jsize ret = 0;
2466 oop s = JNIHandles::resolve_non_null(string);
2467 if (java_lang_String::value(s) != NULL) {
2468 ret = java_lang_String::length(s);
2469 }
2470 HOTSPOT_JNI_GETSTRINGLENGTH_RETURN(ret);
2471 return ret;
2472 JNI_END
2473
2474
2475 JNI_QUICK_ENTRY(const jchar*, jni_GetStringChars(
2476 JNIEnv *env, jstring string, jboolean *isCopy))
2477 JNIWrapper("GetStringChars");
2478 HOTSPOT_JNI_GETSTRINGCHARS_ENTRY(env, string, (uintptr_t *) isCopy);
2479 jchar* buf = NULL;
2480 oop s = JNIHandles::resolve_non_null(string);
2481 typeArrayOop s_value = java_lang_String::value(s);
2482 if (s_value != NULL) {
2483 int s_len = java_lang_String::length(s);
2484 bool is_latin1 = java_lang_String::is_latin1(s);
2485 buf = NEW_C_HEAP_ARRAY_RETURN_NULL(jchar, s_len + 1, mtInternal); // add one for zero termination
2486 /* JNI Specification states return NULL on OOM */
2487 if (buf != NULL) {
2488 if (s_len > 0) {
2489 if (!is_latin1) {
2490 memcpy(buf, s_value->char_at_addr(0), sizeof(jchar)*s_len);
2491 } else {
2492 for (int i = 0; i < s_len; i++) {
2493 buf[i] = ((jchar) s_value->byte_at(i)) & 0xff;
2494 }
2495 }
2496 }
2497 buf[s_len] = 0;
2498 //%note jni_5
2499 if (isCopy != NULL) {
2500 *isCopy = JNI_TRUE;
2501 }
2502 }
2503 }
2504 HOTSPOT_JNI_GETSTRINGCHARS_RETURN(buf);
2505 return buf;
2506 JNI_END
2507
2508
2509 JNI_QUICK_ENTRY(void, jni_ReleaseStringChars(JNIEnv *env, jstring str, const jchar *chars))
2510 JNIWrapper("ReleaseStringChars");
2511 HOTSPOT_JNI_RELEASESTRINGCHARS_ENTRY(env, str, (uint16_t *) chars);
2512 //%note jni_6
2513 if (chars != NULL) {
2514 // Since String objects are supposed to be immutable, don't copy any
2515 // new data back. A bad user will have to go after the char array.
2516 FreeHeap((void*) chars);
2517 }
2518 HOTSPOT_JNI_RELEASESTRINGCHARS_RETURN();
2519 JNI_END
2520
2521
2522 // UTF Interface
2523
2524 DT_RETURN_MARK_DECL(NewStringUTF, jstring
2525 , HOTSPOT_JNI_NEWSTRINGUTF_RETURN(_ret_ref));
2526
2527 JNI_ENTRY(jstring, jni_NewStringUTF(JNIEnv *env, const char *bytes))
2528 JNIWrapper("NewStringUTF");
2529 HOTSPOT_JNI_NEWSTRINGUTF_ENTRY(env, (char *) bytes);
2530 jstring ret;
2531 DT_RETURN_MARK(NewStringUTF, jstring, (const jstring&)ret);
2532
2533 oop result = java_lang_String::create_oop_from_str((char*) bytes, CHECK_NULL);
2534 ret = (jstring) JNIHandles::make_local(env, result);
2535 return ret;
2536 JNI_END
2537
2538
2539 JNI_ENTRY(jsize, jni_GetStringUTFLength(JNIEnv *env, jstring string))
2540 JNIWrapper("GetStringUTFLength");
2541 HOTSPOT_JNI_GETSTRINGUTFLENGTH_ENTRY(env, string);
2542 jsize ret = 0;
2543 oop java_string = JNIHandles::resolve_non_null(string);
2544 if (java_lang_String::value(java_string) != NULL) {
2545 ret = java_lang_String::utf8_length(java_string);
2546 }
2547 HOTSPOT_JNI_GETSTRINGUTFLENGTH_RETURN(ret);
2548 return ret;
2549 JNI_END
2550
2551
2552 JNI_ENTRY(const char*, jni_GetStringUTFChars(JNIEnv *env, jstring string, jboolean *isCopy))
2553 JNIWrapper("GetStringUTFChars");
2554 HOTSPOT_JNI_GETSTRINGUTFCHARS_ENTRY(env, string, (uintptr_t *) isCopy);
2555 char* result = NULL;
2556 oop java_string = JNIHandles::resolve_non_null(string);
2557 if (java_lang_String::value(java_string) != NULL) {
2558 size_t length = java_lang_String::utf8_length(java_string);
2559 /* JNI Specification states return NULL on OOM */
2560 result = AllocateHeap(length + 1, mtInternal, 0, AllocFailStrategy::RETURN_NULL);
2561 if (result != NULL) {
2562 java_lang_String::as_utf8_string(java_string, result, (int) length + 1);
2563 if (isCopy != NULL) {
2564 *isCopy = JNI_TRUE;
2565 }
2566 }
2567 }
2568 HOTSPOT_JNI_GETSTRINGUTFCHARS_RETURN(result);
2569 return result;
2570 JNI_END
2571
2572
2573 JNI_LEAF(void, jni_ReleaseStringUTFChars(JNIEnv *env, jstring str, const char *chars))
2574 JNIWrapper("ReleaseStringUTFChars");
2575 HOTSPOT_JNI_RELEASESTRINGUTFCHARS_ENTRY(env, str, (char *) chars);
2576 if (chars != NULL) {
2577 FreeHeap((char*) chars);
2578 }
2579 HOTSPOT_JNI_RELEASESTRINGUTFCHARS_RETURN();
2580 JNI_END
2581
2582
2583 JNI_QUICK_ENTRY(jsize, jni_GetArrayLength(JNIEnv *env, jarray array))
2584 JNIWrapper("GetArrayLength");
2585 HOTSPOT_JNI_GETARRAYLENGTH_ENTRY(env, array);
2586 arrayOop a = arrayOop(JNIHandles::resolve_non_null(array));
2587 assert(a->is_array(), "must be array");
2588 jsize ret = a->length();
2589 HOTSPOT_JNI_GETARRAYLENGTH_RETURN(ret);
2590 return ret;
2591 JNI_END
2592
2593
2594 //
2595 // Object Array Operations
2596 //
2597
2598 DT_RETURN_MARK_DECL(NewObjectArray, jobjectArray
2599 , HOTSPOT_JNI_NEWOBJECTARRAY_RETURN(_ret_ref));
2600
2601 JNI_ENTRY(jobjectArray, jni_NewObjectArray(JNIEnv *env, jsize length, jclass elementClass, jobject initialElement))
2602 JNIWrapper("NewObjectArray");
2603 HOTSPOT_JNI_NEWOBJECTARRAY_ENTRY(env, length, elementClass, initialElement);
2604 jobjectArray ret = NULL;
2605 DT_RETURN_MARK(NewObjectArray, jobjectArray, (const jobjectArray&)ret);
2606 KlassHandle ek(THREAD, java_lang_Class::as_Klass(JNIHandles::resolve_non_null(elementClass)));
2607 Klass* ako = ek()->array_klass(CHECK_NULL);
2608 KlassHandle ak = KlassHandle(THREAD, ako);
2609 ObjArrayKlass::cast(ak())->initialize(CHECK_NULL);
2610 objArrayOop result = ObjArrayKlass::cast(ak())->allocate(length, CHECK_NULL);
2611 oop initial_value = JNIHandles::resolve(initialElement);
2612 if (initial_value != NULL) { // array already initialized with NULL
2613 for (int index = 0; index < length; index++) {
2614 result->obj_at_put(index, initial_value);
2615 }
2616 }
2617 ret = (jobjectArray) JNIHandles::make_local(env, result);
2618 return ret;
2619 JNI_END
2620
2621 DT_RETURN_MARK_DECL(GetObjectArrayElement, jobject
2622 , HOTSPOT_JNI_GETOBJECTARRAYELEMENT_RETURN(_ret_ref));
2623
2624 JNI_ENTRY(jobject, jni_GetObjectArrayElement(JNIEnv *env, jobjectArray array, jsize index))
2625 JNIWrapper("GetObjectArrayElement");
2626 HOTSPOT_JNI_GETOBJECTARRAYELEMENT_ENTRY(env, array, index);
2627 jobject ret = NULL;
2628 DT_RETURN_MARK(GetObjectArrayElement, jobject, (const jobject&)ret);
2629 objArrayOop a = objArrayOop(JNIHandles::resolve_non_null(array));
2630 if (a->is_within_bounds(index)) {
2631 ret = JNIHandles::make_local(env, a->obj_at(index));
2632 return ret;
2633 } else {
2634 char buf[jintAsStringSize];
2635 sprintf(buf, "%d", index);
2636 THROW_MSG_0(vmSymbols::java_lang_ArrayIndexOutOfBoundsException(), buf);
2637 }
2638 JNI_END
2639
2640 DT_VOID_RETURN_MARK_DECL(SetObjectArrayElement
2641 , HOTSPOT_JNI_SETOBJECTARRAYELEMENT_RETURN());
2642
2643 JNI_ENTRY(void, jni_SetObjectArrayElement(JNIEnv *env, jobjectArray array, jsize index, jobject value))
2644 JNIWrapper("SetObjectArrayElement");
2645 HOTSPOT_JNI_SETOBJECTARRAYELEMENT_ENTRY(env, array, index, value);
2646 DT_VOID_RETURN_MARK(SetObjectArrayElement);
2647
2648 objArrayOop a = objArrayOop(JNIHandles::resolve_non_null(array));
2649 oop v = JNIHandles::resolve(value);
2650 if (a->is_within_bounds(index)) {
2651 if (v == NULL || v->is_a(ObjArrayKlass::cast(a->klass())->element_klass())) {
2652 a->obj_at_put(index, v);
2653 } else {
2654 THROW(vmSymbols::java_lang_ArrayStoreException());
2655 }
2656 } else {
2657 char buf[jintAsStringSize];
2658 sprintf(buf, "%d", index);
2659 THROW_MSG(vmSymbols::java_lang_ArrayIndexOutOfBoundsException(), buf);
2660 }
2661 JNI_END
2662
2663
2664
2665 #define DEFINE_NEWSCALARARRAY(Return,Allocator,Result \
2666 ,EntryProbe,ReturnProbe) \
2667 \
2668 DT_RETURN_MARK_DECL(New##Result##Array, Return \
2669 , ReturnProbe); \
2670 \
2671 JNI_ENTRY(Return, \
2672 jni_New##Result##Array(JNIEnv *env, jsize len)) \
2673 JNIWrapper("New" XSTR(Result) "Array"); \
2674 EntryProbe; \
2675 Return ret = NULL;\
2676 DT_RETURN_MARK(New##Result##Array, Return, (const Return&)ret);\
2677 \
2678 oop obj= oopFactory::Allocator(len, CHECK_0); \
2679 ret = (Return) JNIHandles::make_local(env, obj); \
2680 return ret;\
2681 JNI_END
2682
2683 DEFINE_NEWSCALARARRAY(jbooleanArray, new_boolArray, Boolean,
2684 HOTSPOT_JNI_NEWBOOLEANARRAY_ENTRY(env, len),
2685 HOTSPOT_JNI_NEWBOOLEANARRAY_RETURN(_ret_ref))
2686 DEFINE_NEWSCALARARRAY(jbyteArray, new_byteArray, Byte,
2687 HOTSPOT_JNI_NEWBYTEARRAY_ENTRY(env, len),
2688 HOTSPOT_JNI_NEWBYTEARRAY_RETURN(_ret_ref))
2689 DEFINE_NEWSCALARARRAY(jshortArray, new_shortArray, Short,
2690 HOTSPOT_JNI_NEWSHORTARRAY_ENTRY(env, len),
2691 HOTSPOT_JNI_NEWSHORTARRAY_RETURN(_ret_ref))
2692 DEFINE_NEWSCALARARRAY(jcharArray, new_charArray, Char,
2693 HOTSPOT_JNI_NEWCHARARRAY_ENTRY(env, len),
2694 HOTSPOT_JNI_NEWCHARARRAY_RETURN(_ret_ref))
2695 DEFINE_NEWSCALARARRAY(jintArray, new_intArray, Int,
2696 HOTSPOT_JNI_NEWINTARRAY_ENTRY(env, len),
2697 HOTSPOT_JNI_NEWINTARRAY_RETURN(_ret_ref))
2698 DEFINE_NEWSCALARARRAY(jlongArray, new_longArray, Long,
2699 HOTSPOT_JNI_NEWLONGARRAY_ENTRY(env, len),
2700 HOTSPOT_JNI_NEWLONGARRAY_RETURN(_ret_ref))
2701 DEFINE_NEWSCALARARRAY(jfloatArray, new_singleArray, Float,
2702 HOTSPOT_JNI_NEWFLOATARRAY_ENTRY(env, len),
2703 HOTSPOT_JNI_NEWFLOATARRAY_RETURN(_ret_ref))
2704 DEFINE_NEWSCALARARRAY(jdoubleArray, new_doubleArray, Double,
2705 HOTSPOT_JNI_NEWDOUBLEARRAY_ENTRY(env, len),
2706 HOTSPOT_JNI_NEWDOUBLEARRAY_RETURN(_ret_ref))
2707
2708 // Return an address which will fault if the caller writes to it.
2709
2710 static char* get_bad_address() {
2711 static char* bad_address = NULL;
2712 if (bad_address == NULL) {
2713 size_t size = os::vm_allocation_granularity();
2714 bad_address = os::reserve_memory(size);
2715 if (bad_address != NULL) {
2716 os::protect_memory(bad_address, size, os::MEM_PROT_READ,
2717 /*is_committed*/false);
2718 MemTracker::record_virtual_memory_type((void*)bad_address, mtInternal);
2719 }
2720 }
2721 return bad_address;
2722 }
2723
2724
2725
2726 #define DEFINE_GETSCALARARRAYELEMENTS(ElementTag,ElementType,Result, Tag \
2727 , EntryProbe, ReturnProbe) \
2728 \
2729 JNI_QUICK_ENTRY(ElementType*, \
2730 jni_Get##Result##ArrayElements(JNIEnv *env, ElementType##Array array, jboolean *isCopy)) \
2731 JNIWrapper("Get" XSTR(Result) "ArrayElements"); \
2732 EntryProbe; \
2733 /* allocate an chunk of memory in c land */ \
2734 typeArrayOop a = typeArrayOop(JNIHandles::resolve_non_null(array)); \
2735 ElementType* result; \
2736 int len = a->length(); \
2737 if (len == 0) { \
2738 /* Empty array: legal but useless, can't return NULL. \
2739 * Return a pointer to something useless. \
2740 * Avoid asserts in typeArrayOop. */ \
2741 result = (ElementType*)get_bad_address(); \
2742 } else { \
2743 /* JNI Specification states return NULL on OOM */ \
2744 result = NEW_C_HEAP_ARRAY_RETURN_NULL(ElementType, len, mtInternal); \
2745 if (result != NULL) { \
2746 /* copy the array to the c chunk */ \
2747 memcpy(result, a->Tag##_at_addr(0), sizeof(ElementType)*len); \
2748 if (isCopy) { \
2749 *isCopy = JNI_TRUE; \
2750 } \
2751 } \
2752 } \
2753 ReturnProbe; \
2754 return result; \
2755 JNI_END
2756
2757 DEFINE_GETSCALARARRAYELEMENTS(T_BOOLEAN, jboolean, Boolean, bool
2758 , HOTSPOT_JNI_GETBOOLEANARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy),
2759 HOTSPOT_JNI_GETBOOLEANARRAYELEMENTS_RETURN((uintptr_t*)result))
2760 DEFINE_GETSCALARARRAYELEMENTS(T_BYTE, jbyte, Byte, byte
2761 , HOTSPOT_JNI_GETBYTEARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy),
2762 HOTSPOT_JNI_GETBYTEARRAYELEMENTS_RETURN((char*)result))
2763 DEFINE_GETSCALARARRAYELEMENTS(T_SHORT, jshort, Short, short
2764 , HOTSPOT_JNI_GETSHORTARRAYELEMENTS_ENTRY(env, (uint16_t*) array, (uintptr_t *) isCopy),
2765 HOTSPOT_JNI_GETSHORTARRAYELEMENTS_RETURN((uint16_t*)result))
2766 DEFINE_GETSCALARARRAYELEMENTS(T_CHAR, jchar, Char, char
2767 , HOTSPOT_JNI_GETCHARARRAYELEMENTS_ENTRY(env, (uint16_t*) array, (uintptr_t *) isCopy),
2768 HOTSPOT_JNI_GETCHARARRAYELEMENTS_RETURN(result))
2769 DEFINE_GETSCALARARRAYELEMENTS(T_INT, jint, Int, int
2770 , HOTSPOT_JNI_GETINTARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy),
2771 HOTSPOT_JNI_GETINTARRAYELEMENTS_RETURN((uint32_t*)result))
2772 DEFINE_GETSCALARARRAYELEMENTS(T_LONG, jlong, Long, long
2773 , HOTSPOT_JNI_GETLONGARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy),
2774 HOTSPOT_JNI_GETLONGARRAYELEMENTS_RETURN(((uintptr_t*)result)))
2775 // Float and double probes don't return value because dtrace doesn't currently support it
2776 DEFINE_GETSCALARARRAYELEMENTS(T_FLOAT, jfloat, Float, float
2777 , HOTSPOT_JNI_GETFLOATARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy),
2778 HOTSPOT_JNI_GETFLOATARRAYELEMENTS_RETURN(result))
2779 DEFINE_GETSCALARARRAYELEMENTS(T_DOUBLE, jdouble, Double, double
2780 , HOTSPOT_JNI_GETDOUBLEARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy),
2781 HOTSPOT_JNI_GETDOUBLEARRAYELEMENTS_RETURN(result))
2782
2783
2784 #define DEFINE_RELEASESCALARARRAYELEMENTS(ElementTag,ElementType,Result,Tag \
2785 , EntryProbe, ReturnProbe);\
2786 \
2787 JNI_QUICK_ENTRY(void, \
2788 jni_Release##Result##ArrayElements(JNIEnv *env, ElementType##Array array, \
2789 ElementType *buf, jint mode)) \
2790 JNIWrapper("Release" XSTR(Result) "ArrayElements"); \
2791 EntryProbe; \
2792 typeArrayOop a = typeArrayOop(JNIHandles::resolve_non_null(array)); \
2793 int len = a->length(); \
2794 if (len != 0) { /* Empty array: nothing to free or copy. */ \
2795 if ((mode == 0) || (mode == JNI_COMMIT)) { \
2796 memcpy(a->Tag##_at_addr(0), buf, sizeof(ElementType)*len); \
2797 } \
2798 if ((mode == 0) || (mode == JNI_ABORT)) { \
2799 FreeHeap(buf); \
2800 } \
2801 } \
2802 ReturnProbe; \
2803 JNI_END
2804
2805 DEFINE_RELEASESCALARARRAYELEMENTS(T_BOOLEAN, jboolean, Boolean, bool
2806 , HOTSPOT_JNI_RELEASEBOOLEANARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) buf, mode),
2807 HOTSPOT_JNI_RELEASEBOOLEANARRAYELEMENTS_RETURN())
2808 DEFINE_RELEASESCALARARRAYELEMENTS(T_BYTE, jbyte, Byte, byte
2809 , HOTSPOT_JNI_RELEASEBYTEARRAYELEMENTS_ENTRY(env, array, (char *) buf, mode),
2810 HOTSPOT_JNI_RELEASEBYTEARRAYELEMENTS_RETURN())
2811 DEFINE_RELEASESCALARARRAYELEMENTS(T_SHORT, jshort, Short, short
2812 , HOTSPOT_JNI_RELEASESHORTARRAYELEMENTS_ENTRY(env, array, (uint16_t *) buf, mode),
2813 HOTSPOT_JNI_RELEASESHORTARRAYELEMENTS_RETURN())
2814 DEFINE_RELEASESCALARARRAYELEMENTS(T_CHAR, jchar, Char, char
2815 , HOTSPOT_JNI_RELEASECHARARRAYELEMENTS_ENTRY(env, array, (uint16_t *) buf, mode),
2816 HOTSPOT_JNI_RELEASECHARARRAYELEMENTS_RETURN())
2817 DEFINE_RELEASESCALARARRAYELEMENTS(T_INT, jint, Int, int
2818 , HOTSPOT_JNI_RELEASEINTARRAYELEMENTS_ENTRY(env, array, (uint32_t *) buf, mode),
2819 HOTSPOT_JNI_RELEASEINTARRAYELEMENTS_RETURN())
2820 DEFINE_RELEASESCALARARRAYELEMENTS(T_LONG, jlong, Long, long
2821 , HOTSPOT_JNI_RELEASELONGARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) buf, mode),
2822 HOTSPOT_JNI_RELEASELONGARRAYELEMENTS_RETURN())
2823 DEFINE_RELEASESCALARARRAYELEMENTS(T_FLOAT, jfloat, Float, float
2824 , HOTSPOT_JNI_RELEASEFLOATARRAYELEMENTS_ENTRY(env, array, (float *) buf, mode),
2825 HOTSPOT_JNI_RELEASEFLOATARRAYELEMENTS_RETURN())
2826 DEFINE_RELEASESCALARARRAYELEMENTS(T_DOUBLE, jdouble, Double, double
2827 , HOTSPOT_JNI_RELEASEDOUBLEARRAYELEMENTS_ENTRY(env, array, (double *) buf, mode),
2828 HOTSPOT_JNI_RELEASEDOUBLEARRAYELEMENTS_RETURN())
2829
2830
2831 #define DEFINE_GETSCALARARRAYREGION(ElementTag,ElementType,Result, Tag \
2832 , EntryProbe, ReturnProbe); \
2833 DT_VOID_RETURN_MARK_DECL(Get##Result##ArrayRegion \
2834 , ReturnProbe); \
2835 \
2836 JNI_ENTRY(void, \
2837 jni_Get##Result##ArrayRegion(JNIEnv *env, ElementType##Array array, jsize start, \
2838 jsize len, ElementType *buf)) \
2839 JNIWrapper("Get" XSTR(Result) "ArrayRegion"); \
2840 EntryProbe; \
2841 DT_VOID_RETURN_MARK(Get##Result##ArrayRegion); \
2842 typeArrayOop src = typeArrayOop(JNIHandles::resolve_non_null(array)); \
2843 if (start < 0 || len < 0 || ((unsigned int)start + (unsigned int)len > (unsigned int)src->length())) { \
2844 THROW(vmSymbols::java_lang_ArrayIndexOutOfBoundsException()); \
2845 } else { \
2846 if (len > 0) { \
2847 int sc = TypeArrayKlass::cast(src->klass())->log2_element_size(); \
2848 memcpy((u_char*) buf, \
2849 (u_char*) src->Tag##_at_addr(start), \
2850 len << sc); \
2851 } \
2852 } \
2853 JNI_END
2854
2855 DEFINE_GETSCALARARRAYREGION(T_BOOLEAN, jboolean,Boolean, bool
2856 , HOTSPOT_JNI_GETBOOLEANARRAYREGION_ENTRY(env, array, start, len, (uintptr_t *) buf),
2857 HOTSPOT_JNI_GETBOOLEANARRAYREGION_RETURN());
2858 DEFINE_GETSCALARARRAYREGION(T_BYTE, jbyte, Byte, byte
2859 , HOTSPOT_JNI_GETBYTEARRAYREGION_ENTRY(env, array, start, len, (char *) buf),
2860 HOTSPOT_JNI_GETBYTEARRAYREGION_RETURN());
2861 DEFINE_GETSCALARARRAYREGION(T_SHORT, jshort, Short, short
2862 , HOTSPOT_JNI_GETSHORTARRAYREGION_ENTRY(env, array, start, len, (uint16_t *) buf),
2863 HOTSPOT_JNI_GETSHORTARRAYREGION_RETURN());
2864 DEFINE_GETSCALARARRAYREGION(T_CHAR, jchar, Char, char
2865 , HOTSPOT_JNI_GETCHARARRAYREGION_ENTRY(env, array, start, len, (uint16_t*) buf),
2866 HOTSPOT_JNI_GETCHARARRAYREGION_RETURN());
2867 DEFINE_GETSCALARARRAYREGION(T_INT, jint, Int, int
2868 , HOTSPOT_JNI_GETINTARRAYREGION_ENTRY(env, array, start, len, (uint32_t*) buf),
2869 HOTSPOT_JNI_GETINTARRAYREGION_RETURN());
2870 DEFINE_GETSCALARARRAYREGION(T_LONG, jlong, Long, long
2871 , HOTSPOT_JNI_GETLONGARRAYREGION_ENTRY(env, array, start, len, (uintptr_t *) buf),
2872 HOTSPOT_JNI_GETLONGARRAYREGION_RETURN());
2873 DEFINE_GETSCALARARRAYREGION(T_FLOAT, jfloat, Float, float
2874 , HOTSPOT_JNI_GETFLOATARRAYREGION_ENTRY(env, array, start, len, (float *) buf),
2875 HOTSPOT_JNI_GETFLOATARRAYREGION_RETURN());
2876 DEFINE_GETSCALARARRAYREGION(T_DOUBLE, jdouble, Double, double
2877 , HOTSPOT_JNI_GETDOUBLEARRAYREGION_ENTRY(env, array, start, len, (double *) buf),
2878 HOTSPOT_JNI_GETDOUBLEARRAYREGION_RETURN());
2879
2880
2881 #define DEFINE_SETSCALARARRAYREGION(ElementTag,ElementType,Result, Tag \
2882 , EntryProbe, ReturnProbe); \
2883 DT_VOID_RETURN_MARK_DECL(Set##Result##ArrayRegion \
2884 ,ReturnProbe); \
2885 \
2886 JNI_ENTRY(void, \
2887 jni_Set##Result##ArrayRegion(JNIEnv *env, ElementType##Array array, jsize start, \
2888 jsize len, const ElementType *buf)) \
2889 JNIWrapper("Set" XSTR(Result) "ArrayRegion"); \
2890 EntryProbe; \
2891 DT_VOID_RETURN_MARK(Set##Result##ArrayRegion); \
2892 typeArrayOop dst = typeArrayOop(JNIHandles::resolve_non_null(array)); \
2893 if (start < 0 || len < 0 || ((unsigned int)start + (unsigned int)len > (unsigned int)dst->length())) { \
2894 THROW(vmSymbols::java_lang_ArrayIndexOutOfBoundsException()); \
2895 } else { \
2896 if (len > 0) { \
2897 int sc = TypeArrayKlass::cast(dst->klass())->log2_element_size(); \
2898 memcpy((u_char*) dst->Tag##_at_addr(start), \
2899 (u_char*) buf, \
2900 len << sc); \
2901 } \
2902 } \
2903 JNI_END
2904
2905 DEFINE_SETSCALARARRAYREGION(T_BOOLEAN, jboolean, Boolean, bool
2906 , HOTSPOT_JNI_SETBOOLEANARRAYREGION_ENTRY(env, array, start, len, (uintptr_t *)buf),
2907 HOTSPOT_JNI_SETBOOLEANARRAYREGION_RETURN())
2908 DEFINE_SETSCALARARRAYREGION(T_BYTE, jbyte, Byte, byte
2909 , HOTSPOT_JNI_SETBYTEARRAYREGION_ENTRY(env, array, start, len, (char *) buf),
2910 HOTSPOT_JNI_SETBYTEARRAYREGION_RETURN())
2911 DEFINE_SETSCALARARRAYREGION(T_SHORT, jshort, Short, short
2912 , HOTSPOT_JNI_SETSHORTARRAYREGION_ENTRY(env, array, start, len, (uint16_t *) buf),
2913 HOTSPOT_JNI_SETSHORTARRAYREGION_RETURN())
2914 DEFINE_SETSCALARARRAYREGION(T_CHAR, jchar, Char, char
2915 , HOTSPOT_JNI_SETCHARARRAYREGION_ENTRY(env, array, start, len, (uint16_t *) buf),
2916 HOTSPOT_JNI_SETCHARARRAYREGION_RETURN())
2917 DEFINE_SETSCALARARRAYREGION(T_INT, jint, Int, int
2918 , HOTSPOT_JNI_SETINTARRAYREGION_ENTRY(env, array, start, len, (uint32_t *) buf),
2919 HOTSPOT_JNI_SETINTARRAYREGION_RETURN())
2920 DEFINE_SETSCALARARRAYREGION(T_LONG, jlong, Long, long
2921 , HOTSPOT_JNI_SETLONGARRAYREGION_ENTRY(env, array, start, len, (uintptr_t *) buf),
2922 HOTSPOT_JNI_SETLONGARRAYREGION_RETURN())
2923 DEFINE_SETSCALARARRAYREGION(T_FLOAT, jfloat, Float, float
2924 , HOTSPOT_JNI_SETFLOATARRAYREGION_ENTRY(env, array, start, len, (float *) buf),
2925 HOTSPOT_JNI_SETFLOATARRAYREGION_RETURN())
2926 DEFINE_SETSCALARARRAYREGION(T_DOUBLE, jdouble, Double, double
2927 , HOTSPOT_JNI_SETDOUBLEARRAYREGION_ENTRY(env, array, start, len, (double *) buf),
2928 HOTSPOT_JNI_SETDOUBLEARRAYREGION_RETURN())
2929
2930
2931 //
2932 // Interception of natives
2933 //
2934
2935 // The RegisterNatives call being attempted tried to register with a method that
2936 // is not native. Ask JVM TI what prefixes have been specified. Then check
2937 // to see if the native method is now wrapped with the prefixes. See the
2938 // SetNativeMethodPrefix(es) functions in the JVM TI Spec for details.
2939 static Method* find_prefixed_native(KlassHandle k,
2940 Symbol* name, Symbol* signature, TRAPS) {
2941 #if INCLUDE_JVMTI
2942 ResourceMark rm(THREAD);
2943 Method* method;
2944 int name_len = name->utf8_length();
2945 char* name_str = name->as_utf8();
2946 int prefix_count;
2947 char** prefixes = JvmtiExport::get_all_native_method_prefixes(&prefix_count);
2948 for (int i = 0; i < prefix_count; i++) {
2949 char* prefix = prefixes[i];
2950 int prefix_len = (int)strlen(prefix);
2951
2952 // try adding this prefix to the method name and see if it matches another method name
2953 int trial_len = name_len + prefix_len;
2954 char* trial_name_str = NEW_RESOURCE_ARRAY(char, trial_len + 1);
2955 strcpy(trial_name_str, prefix);
2956 strcat(trial_name_str, name_str);
2957 TempNewSymbol trial_name = SymbolTable::probe(trial_name_str, trial_len);
2958 if (trial_name == NULL) {
2959 continue; // no such symbol, so this prefix wasn't used, try the next prefix
2960 }
2961 method = k()->lookup_method(trial_name, signature);
2962 if (method == NULL) {
2963 continue; // signature doesn't match, try the next prefix
2964 }
2965 if (method->is_native()) {
2966 method->set_is_prefixed_native();
2967 return method; // wahoo, we found a prefixed version of the method, return it
2968 }
2969 // found as non-native, so prefix is good, add it, probably just need more prefixes
2970 name_len = trial_len;
2971 name_str = trial_name_str;
2972 }
2973 #endif // INCLUDE_JVMTI
2974 return NULL; // not found
2975 }
2976
2977 static bool register_native(KlassHandle k, Symbol* name, Symbol* signature, address entry, TRAPS) {
2978 Method* method = k()->lookup_method(name, signature);
2979 if (method == NULL) {
2980 ResourceMark rm;
2981 stringStream st;
2982 st.print("Method %s name or signature does not match",
2983 Method::name_and_sig_as_C_string(k(), name, signature));
2984 THROW_MSG_(vmSymbols::java_lang_NoSuchMethodError(), st.as_string(), false);
2985 }
2986 if (!method->is_native()) {
2987 // trying to register to a non-native method, see if a JVM TI agent has added prefix(es)
2988 method = find_prefixed_native(k, name, signature, THREAD);
2989 if (method == NULL) {
2990 ResourceMark rm;
2991 stringStream st;
2992 st.print("Method %s is not declared as native",
2993 Method::name_and_sig_as_C_string(k(), name, signature));
2994 THROW_MSG_(vmSymbols::java_lang_NoSuchMethodError(), st.as_string(), false);
2995 }
2996 }
2997
2998 if (entry != NULL) {
2999 method->set_native_function(entry,
3000 Method::native_bind_event_is_interesting);
3001 } else {
3002 method->clear_native_function();
3003 }
3004 if (PrintJNIResolving) {
3005 ResourceMark rm(THREAD);
3006 tty->print_cr("[Registering JNI native method %s.%s]",
3007 method->method_holder()->external_name(),
3008 method->name()->as_C_string());
3009 }
3010 return true;
3011 }
3012
3013 DT_RETURN_MARK_DECL(RegisterNatives, jint
3014 , HOTSPOT_JNI_REGISTERNATIVES_RETURN(_ret_ref));
3015
3016 JNI_ENTRY(jint, jni_RegisterNatives(JNIEnv *env, jclass clazz,
3017 const JNINativeMethod *methods,
3018 jint nMethods))
3019 JNIWrapper("RegisterNatives");
3020 HOTSPOT_JNI_REGISTERNATIVES_ENTRY(env, clazz, (void *) methods, nMethods);
3021 jint ret = 0;
3022 DT_RETURN_MARK(RegisterNatives, jint, (const jint&)ret);
3023
3024 KlassHandle h_k(thread, java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz)));
3025
3026 for (int index = 0; index < nMethods; index++) {
3027 const char* meth_name = methods[index].name;
3028 const char* meth_sig = methods[index].signature;
3029 int meth_name_len = (int)strlen(meth_name);
3030
3031 // The class should have been loaded (we have an instance of the class
3032 // passed in) so the method and signature should already be in the symbol
3033 // table. If they're not there, the method doesn't exist.
3034 TempNewSymbol name = SymbolTable::probe(meth_name, meth_name_len);
3035 TempNewSymbol signature = SymbolTable::probe(meth_sig, (int)strlen(meth_sig));
3036
3037 if (name == NULL || signature == NULL) {
3038 ResourceMark rm;
3039 stringStream st;
3040 st.print("Method %s.%s%s not found", h_k()->external_name(), meth_name, meth_sig);
3041 // Must return negative value on failure
3042 THROW_MSG_(vmSymbols::java_lang_NoSuchMethodError(), st.as_string(), -1);
3043 }
3044
3045 bool res = register_native(h_k, name, signature,
3046 (address) methods[index].fnPtr, THREAD);
3047 if (!res) {
3048 ret = -1;
3049 break;
3050 }
3051 }
3052 return ret;
3053 JNI_END
3054
3055
3056 JNI_ENTRY(jint, jni_UnregisterNatives(JNIEnv *env, jclass clazz))
3057 JNIWrapper("UnregisterNatives");
3058 HOTSPOT_JNI_UNREGISTERNATIVES_ENTRY(env, clazz);
3059 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz));
3060 //%note jni_2
3061 if (k->is_instance_klass()) {
3062 for (int index = 0; index < InstanceKlass::cast(k)->methods()->length(); index++) {
3063 Method* m = InstanceKlass::cast(k)->methods()->at(index);
3064 if (m->is_native()) {
3065 m->clear_native_function();
3066 m->set_signature_handler(NULL);
3067 }
3068 }
3069 }
3070 HOTSPOT_JNI_UNREGISTERNATIVES_RETURN(0);
3071 return 0;
3072 JNI_END
3073
3074 //
3075 // Monitor functions
3076 //
3077
3078 DT_RETURN_MARK_DECL(MonitorEnter, jint
3079 , HOTSPOT_JNI_MONITORENTER_RETURN(_ret_ref));
3080
3081 JNI_ENTRY(jint, jni_MonitorEnter(JNIEnv *env, jobject jobj))
3082 HOTSPOT_JNI_MONITORENTER_ENTRY(env, jobj);
3083 jint ret = JNI_ERR;
3084 DT_RETURN_MARK(MonitorEnter, jint, (const jint&)ret);
3085
3086 // If the object is null, we can't do anything with it
3087 if (jobj == NULL) {
3088 THROW_(vmSymbols::java_lang_NullPointerException(), JNI_ERR);
3089 }
3090
3091 Handle obj(thread, JNIHandles::resolve_non_null(jobj));
3092 ObjectSynchronizer::jni_enter(obj, CHECK_(JNI_ERR));
3093 ret = JNI_OK;
3094 return ret;
3095 JNI_END
3096
3097 DT_RETURN_MARK_DECL(MonitorExit, jint
3098 , HOTSPOT_JNI_MONITOREXIT_RETURN(_ret_ref));
3099
3100 JNI_ENTRY(jint, jni_MonitorExit(JNIEnv *env, jobject jobj))
3101 HOTSPOT_JNI_MONITOREXIT_ENTRY(env, jobj);
3102 jint ret = JNI_ERR;
3103 DT_RETURN_MARK(MonitorExit, jint, (const jint&)ret);
3104
3105 // Don't do anything with a null object
3106 if (jobj == NULL) {
3107 THROW_(vmSymbols::java_lang_NullPointerException(), JNI_ERR);
3108 }
3109
3110 Handle obj(THREAD, JNIHandles::resolve_non_null(jobj));
3111 ObjectSynchronizer::jni_exit(obj(), CHECK_(JNI_ERR));
3112
3113 ret = JNI_OK;
3114 return ret;
3115 JNI_END
3116
3117 //
3118 // Extensions
3119 //
3120
3121 DT_VOID_RETURN_MARK_DECL(GetStringRegion
3122 , HOTSPOT_JNI_GETSTRINGREGION_RETURN());
3123
3124 JNI_ENTRY(void, jni_GetStringRegion(JNIEnv *env, jstring string, jsize start, jsize len, jchar *buf))
3125 JNIWrapper("GetStringRegion");
3126 HOTSPOT_JNI_GETSTRINGREGION_ENTRY(env, string, start, len, buf);
3127 DT_VOID_RETURN_MARK(GetStringRegion);
3128 oop s = JNIHandles::resolve_non_null(string);
3129 int s_len = java_lang_String::length(s);
3130 if (start < 0 || len < 0 || start + len > s_len) {
3131 THROW(vmSymbols::java_lang_StringIndexOutOfBoundsException());
3132 } else {
3133 if (len > 0) {
3134 typeArrayOop s_value = java_lang_String::value(s);
3135 bool is_latin1 = java_lang_String::is_latin1(s);
3136 if (!is_latin1) {
3137 memcpy(buf, s_value->char_at_addr(start), sizeof(jchar)*len);
3138 } else {
3139 for (int i = 0; i < len; i++) {
3140 buf[i] = ((jchar) s_value->byte_at(i + start)) & 0xff;
3141 }
3142 }
3143 }
3144 }
3145 JNI_END
3146
3147 DT_VOID_RETURN_MARK_DECL(GetStringUTFRegion
3148 , HOTSPOT_JNI_GETSTRINGUTFREGION_RETURN());
3149
3150 JNI_ENTRY(void, jni_GetStringUTFRegion(JNIEnv *env, jstring string, jsize start, jsize len, char *buf))
3151 JNIWrapper("GetStringUTFRegion");
3152 HOTSPOT_JNI_GETSTRINGUTFREGION_ENTRY(env, string, start, len, buf);
3153 DT_VOID_RETURN_MARK(GetStringUTFRegion);
3154 oop s = JNIHandles::resolve_non_null(string);
3155 int s_len = java_lang_String::length(s);
3156 if (start < 0 || len < 0 || start + len > s_len) {
3157 THROW(vmSymbols::java_lang_StringIndexOutOfBoundsException());
3158 } else {
3159 //%note jni_7
3160 if (len > 0) {
3161 // Assume the buffer is large enough as the JNI spec. does not require user error checking
3162 java_lang_String::as_utf8_string(s, start, len, buf, INT_MAX);
3163 // as_utf8_string null-terminates the result string
3164 } else {
3165 // JDK null-terminates the buffer even in len is zero
3166 if (buf != NULL) {
3167 buf[0] = 0;
3168 }
3169 }
3170 }
3171 JNI_END
3172
3173
3174 JNI_ENTRY(void*, jni_GetPrimitiveArrayCritical(JNIEnv *env, jarray array, jboolean *isCopy))
3175 JNIWrapper("GetPrimitiveArrayCritical");
3176 HOTSPOT_JNI_GETPRIMITIVEARRAYCRITICAL_ENTRY(env, array, (uintptr_t *) isCopy);
3177 GCLocker::lock_critical(thread);
3178 if (isCopy != NULL) {
3179 *isCopy = JNI_FALSE;
3180 }
3181 oop a = JNIHandles::resolve_non_null(array);
3182 assert(a->is_array(), "just checking");
3183 BasicType type;
3184 if (a->is_objArray()) {
3185 type = T_OBJECT;
3186 } else {
3187 type = TypeArrayKlass::cast(a->klass())->element_type();
3188 }
3189 void* ret = arrayOop(a)->base(type);
3190 HOTSPOT_JNI_GETPRIMITIVEARRAYCRITICAL_RETURN(ret);
3191 return ret;
3192 JNI_END
3193
3194
3195 JNI_ENTRY(void, jni_ReleasePrimitiveArrayCritical(JNIEnv *env, jarray array, void *carray, jint mode))
3196 JNIWrapper("ReleasePrimitiveArrayCritical");
3197 HOTSPOT_JNI_RELEASEPRIMITIVEARRAYCRITICAL_ENTRY(env, array, carray, mode);
3198 // The array, carray and mode arguments are ignored
3199 GCLocker::unlock_critical(thread);
3200 HOTSPOT_JNI_RELEASEPRIMITIVEARRAYCRITICAL_RETURN();
3201 JNI_END
3202
3203
3204 JNI_ENTRY(const jchar*, jni_GetStringCritical(JNIEnv *env, jstring string, jboolean *isCopy))
3205 JNIWrapper("GetStringCritical");
3206 HOTSPOT_JNI_GETSTRINGCRITICAL_ENTRY(env, string, (uintptr_t *) isCopy);
3207 GCLocker::lock_critical(thread);
3208 oop s = JNIHandles::resolve_non_null(string);
3209 typeArrayOop s_value = java_lang_String::value(s);
3210 bool is_latin1 = java_lang_String::is_latin1(s);
3211 if (isCopy != NULL) {
3212 *isCopy = is_latin1 ? JNI_TRUE : JNI_FALSE;
3213 }
3214 jchar* ret;
3215 if (!is_latin1) {
3216 ret = (jchar*) s_value->base(T_CHAR);
3217 } else {
3218 // Inflate latin1 encoded string to UTF16
3219 int s_len = java_lang_String::length(s);
3220 ret = NEW_C_HEAP_ARRAY_RETURN_NULL(jchar, s_len + 1, mtInternal); // add one for zero termination
3221 /* JNI Specification states return NULL on OOM */
3222 if (ret != NULL) {
3223 for (int i = 0; i < s_len; i++) {
3224 ret[i] = ((jchar) s_value->byte_at(i)) & 0xff;
3225 }
3226 ret[s_len] = 0;
3227 }
3228 }
3229 HOTSPOT_JNI_GETSTRINGCRITICAL_RETURN((uint16_t *) ret);
3230 return ret;
3231 JNI_END
3232
3233
3234 JNI_ENTRY(void, jni_ReleaseStringCritical(JNIEnv *env, jstring str, const jchar *chars))
3235 JNIWrapper("ReleaseStringCritical");
3236 HOTSPOT_JNI_RELEASESTRINGCRITICAL_ENTRY(env, str, (uint16_t *) chars);
3237 // The str and chars arguments are ignored for UTF16 strings
3238 oop s = JNIHandles::resolve_non_null(str);
3239 bool is_latin1 = java_lang_String::is_latin1(s);
3240 if (is_latin1) {
3241 // For latin1 string, free jchar array allocated by earlier call to GetStringCritical.
3242 // This assumes that ReleaseStringCritical bookends GetStringCritical.
3243 FREE_C_HEAP_ARRAY(jchar, chars);
3244 }
3245 GCLocker::unlock_critical(thread);
3246 HOTSPOT_JNI_RELEASESTRINGCRITICAL_RETURN();
3247 JNI_END
3248
3249
3250 JNI_ENTRY(jweak, jni_NewWeakGlobalRef(JNIEnv *env, jobject ref))
3251 JNIWrapper("jni_NewWeakGlobalRef");
3252 HOTSPOT_JNI_NEWWEAKGLOBALREF_ENTRY(env, ref);
3253 Handle ref_handle(thread, JNIHandles::resolve(ref));
3254 jweak ret = JNIHandles::make_weak_global(ref_handle);
3255 HOTSPOT_JNI_NEWWEAKGLOBALREF_RETURN(ret);
3256 return ret;
3257 JNI_END
3258
3259 // Must be JNI_ENTRY (with HandleMark)
3260 JNI_ENTRY(void, jni_DeleteWeakGlobalRef(JNIEnv *env, jweak ref))
3261 JNIWrapper("jni_DeleteWeakGlobalRef");
3262 HOTSPOT_JNI_DELETEWEAKGLOBALREF_ENTRY(env, ref);
3263 JNIHandles::destroy_weak_global(ref);
3264 HOTSPOT_JNI_DELETEWEAKGLOBALREF_RETURN();
3265 JNI_END
3266
3267
3268 JNI_QUICK_ENTRY(jboolean, jni_ExceptionCheck(JNIEnv *env))
3269 JNIWrapper("jni_ExceptionCheck");
3270 HOTSPOT_JNI_EXCEPTIONCHECK_ENTRY(env);
3271 jni_check_async_exceptions(thread);
3272 jboolean ret = (thread->has_pending_exception()) ? JNI_TRUE : JNI_FALSE;
3273 HOTSPOT_JNI_EXCEPTIONCHECK_RETURN(ret);
3274 return ret;
3275 JNI_END
3276
3277
3278 // Initialization state for three routines below relating to
3279 // java.nio.DirectBuffers
3280 static jint directBufferSupportInitializeStarted = 0;
3281 static volatile jint directBufferSupportInitializeEnded = 0;
3282 static volatile jint directBufferSupportInitializeFailed = 0;
3283 static jclass bufferClass = NULL;
3284 static jclass directBufferClass = NULL;
3285 static jclass directByteBufferClass = NULL;
3286 static jmethodID directByteBufferConstructor = NULL;
3287 static jfieldID directBufferAddressField = NULL;
3288 static jfieldID bufferCapacityField = NULL;
3289
3290 static jclass lookupOne(JNIEnv* env, const char* name, TRAPS) {
3291 Handle loader; // null (bootstrap) loader
3292 Handle protection_domain; // null protection domain
3293
3294 TempNewSymbol sym = SymbolTable::new_symbol(name, CHECK_NULL);
3295 jclass result = find_class_from_class_loader(env, sym, true, loader, protection_domain, true, CHECK_NULL);
3296
3297 if (log_is_enabled(Debug, class, resolve) && result != NULL) {
3298 trace_class_resolution(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(result)));
3299 }
3300 return result;
3301 }
3302
3303 // These lookups are done with the NULL (bootstrap) ClassLoader to
3304 // circumvent any security checks that would be done by jni_FindClass.
3305 JNI_ENTRY(bool, lookupDirectBufferClasses(JNIEnv* env))
3306 {
3307 if ((bufferClass = lookupOne(env, "java/nio/Buffer", thread)) == NULL) { return false; }
3308 if ((directBufferClass = lookupOne(env, "sun/nio/ch/DirectBuffer", thread)) == NULL) { return false; }
3309 if ((directByteBufferClass = lookupOne(env, "java/nio/DirectByteBuffer", thread)) == NULL) { return false; }
3310 return true;
3311 }
3312 JNI_END
3313
3314
3315 static bool initializeDirectBufferSupport(JNIEnv* env, JavaThread* thread) {
3316 if (directBufferSupportInitializeFailed) {
3317 return false;
3318 }
3319
3320 if (Atomic::cmpxchg(1, &directBufferSupportInitializeStarted, 0) == 0) {
3321 if (!lookupDirectBufferClasses(env)) {
3322 directBufferSupportInitializeFailed = 1;
3323 return false;
3324 }
3325
3326 // Make global references for these
3327 bufferClass = (jclass) env->NewGlobalRef(bufferClass);
3328 directBufferClass = (jclass) env->NewGlobalRef(directBufferClass);
3329 directByteBufferClass = (jclass) env->NewGlobalRef(directByteBufferClass);
3330
3331 // Get needed field and method IDs
3332 directByteBufferConstructor = env->GetMethodID(directByteBufferClass, "<init>", "(JI)V");
3333 if (env->ExceptionCheck()) {
3334 env->ExceptionClear();
3335 directBufferSupportInitializeFailed = 1;
3336 return false;
3337 }
3338 directBufferAddressField = env->GetFieldID(bufferClass, "address", "J");
3339 if (env->ExceptionCheck()) {
3340 env->ExceptionClear();
3341 directBufferSupportInitializeFailed = 1;
3342 return false;
3343 }
3344 bufferCapacityField = env->GetFieldID(bufferClass, "capacity", "I");
3345 if (env->ExceptionCheck()) {
3346 env->ExceptionClear();
3347 directBufferSupportInitializeFailed = 1;
3348 return false;
3349 }
3350
3351 if ((directByteBufferConstructor == NULL) ||
3352 (directBufferAddressField == NULL) ||
3353 (bufferCapacityField == NULL)) {
3354 directBufferSupportInitializeFailed = 1;
3355 return false;
3356 }
3357
3358 directBufferSupportInitializeEnded = 1;
3359 } else {
3360 while (!directBufferSupportInitializeEnded && !directBufferSupportInitializeFailed) {
3361 os::naked_yield();
3362 }
3363 }
3364
3365 return !directBufferSupportInitializeFailed;
3366 }
3367
3368 extern "C" jobject JNICALL jni_NewDirectByteBuffer(JNIEnv *env, void* address, jlong capacity)
3369 {
3370 // thread_from_jni_environment() will block if VM is gone.
3371 JavaThread* thread = JavaThread::thread_from_jni_environment(env);
3372
3373 JNIWrapper("jni_NewDirectByteBuffer");
3374 HOTSPOT_JNI_NEWDIRECTBYTEBUFFER_ENTRY(env, address, capacity);
3375
3376 if (!directBufferSupportInitializeEnded) {
3377 if (!initializeDirectBufferSupport(env, thread)) {
3378 HOTSPOT_JNI_NEWDIRECTBYTEBUFFER_RETURN(NULL);
3379 return NULL;
3380 }
3381 }
3382
3383 // Being paranoid about accidental sign extension on address
3384 jlong addr = (jlong) ((uintptr_t) address);
3385 // NOTE that package-private DirectByteBuffer constructor currently
3386 // takes int capacity
3387 jint cap = (jint) capacity;
3388 jobject ret = env->NewObject(directByteBufferClass, directByteBufferConstructor, addr, cap);
3389 HOTSPOT_JNI_NEWDIRECTBYTEBUFFER_RETURN(ret);
3390 return ret;
3391 }
3392
3393 DT_RETURN_MARK_DECL(GetDirectBufferAddress, void*
3394 , HOTSPOT_JNI_GETDIRECTBUFFERADDRESS_RETURN((void*) _ret_ref));
3395
3396 extern "C" void* JNICALL jni_GetDirectBufferAddress(JNIEnv *env, jobject buf)
3397 {
3398 // thread_from_jni_environment() will block if VM is gone.
3399 JavaThread* thread = JavaThread::thread_from_jni_environment(env);
3400
3401 JNIWrapper("jni_GetDirectBufferAddress");
3402 HOTSPOT_JNI_GETDIRECTBUFFERADDRESS_ENTRY(env, buf);
3403 void* ret = NULL;
3404 DT_RETURN_MARK(GetDirectBufferAddress, void*, (const void*&)ret);
3405
3406 if (!directBufferSupportInitializeEnded) {
3407 if (!initializeDirectBufferSupport(env, thread)) {
3408 return 0;
3409 }
3410 }
3411
3412 if ((buf != NULL) && (!env->IsInstanceOf(buf, directBufferClass))) {
3413 return 0;
3414 }
3415
3416 ret = (void*)(intptr_t)env->GetLongField(buf, directBufferAddressField);
3417 return ret;
3418 }
3419
3420 DT_RETURN_MARK_DECL(GetDirectBufferCapacity, jlong
3421 , HOTSPOT_JNI_GETDIRECTBUFFERCAPACITY_RETURN(_ret_ref));
3422
3423 extern "C" jlong JNICALL jni_GetDirectBufferCapacity(JNIEnv *env, jobject buf)
3424 {
3425 // thread_from_jni_environment() will block if VM is gone.
3426 JavaThread* thread = JavaThread::thread_from_jni_environment(env);
3427
3428 JNIWrapper("jni_GetDirectBufferCapacity");
3429 HOTSPOT_JNI_GETDIRECTBUFFERCAPACITY_ENTRY(env, buf);
3430 jlong ret = -1;
3431 DT_RETURN_MARK(GetDirectBufferCapacity, jlong, (const jlong&)ret);
3432
3433 if (!directBufferSupportInitializeEnded) {
3434 if (!initializeDirectBufferSupport(env, thread)) {
3435 ret = 0;
3436 return ret;
3437 }
3438 }
3439
3440 if (buf == NULL) {
3441 return -1;
3442 }
3443
3444 if (!env->IsInstanceOf(buf, directBufferClass)) {
3445 return -1;
3446 }
3447
3448 // NOTE that capacity is currently an int in the implementation
3449 ret = env->GetIntField(buf, bufferCapacityField);
3450 return ret;
3451 }
3452
3453
3454 JNI_LEAF(jint, jni_GetVersion(JNIEnv *env))
3455 JNIWrapper("GetVersion");
3456 HOTSPOT_JNI_GETVERSION_ENTRY(env);
3457 HOTSPOT_JNI_GETVERSION_RETURN(CurrentVersion);
3458 return CurrentVersion;
3459 JNI_END
3460
3461 extern struct JavaVM_ main_vm;
3462
3463 JNI_LEAF(jint, jni_GetJavaVM(JNIEnv *env, JavaVM **vm))
3464 JNIWrapper("jni_GetJavaVM");
3465 HOTSPOT_JNI_GETJAVAVM_ENTRY(env, (void **) vm);
3466 *vm = (JavaVM *)(&main_vm);
3467 HOTSPOT_JNI_GETJAVAVM_RETURN(JNI_OK);
3468 return JNI_OK;
3469 JNI_END
3470
3471
3472 JNI_ENTRY(jobject, jni_GetModule(JNIEnv* env, jclass clazz))
3473 JNIWrapper("GetModule");
3474 return Modules::get_module(clazz, THREAD);
3475 JNI_END
3476
3477
3478 // Structure containing all jni functions
3479 struct JNINativeInterface_ jni_NativeInterface = {
3480 NULL,
3481 NULL,
3482 NULL,
3483
3484 NULL,
3485
3486 jni_GetVersion,
3487
3488 jni_DefineClass,
3489 jni_FindClass,
3490
3491 jni_FromReflectedMethod,
3492 jni_FromReflectedField,
3493
3494 jni_ToReflectedMethod,
3495
3496 jni_GetSuperclass,
3497 jni_IsAssignableFrom,
3498
3499 jni_ToReflectedField,
3500
3501 jni_Throw,
3502 jni_ThrowNew,
3503 jni_ExceptionOccurred,
3504 jni_ExceptionDescribe,
3505 jni_ExceptionClear,
3506 jni_FatalError,
3507
3508 jni_PushLocalFrame,
3509 jni_PopLocalFrame,
3510
3511 jni_NewGlobalRef,
3512 jni_DeleteGlobalRef,
3513 jni_DeleteLocalRef,
3514 jni_IsSameObject,
3515
3516 jni_NewLocalRef,
3517 jni_EnsureLocalCapacity,
3518
3519 jni_AllocObject,
3520 jni_NewObject,
3521 jni_NewObjectV,
3522 jni_NewObjectA,
3523
3524 jni_GetObjectClass,
3525 jni_IsInstanceOf,
3526
3527 jni_GetMethodID,
3528
3529 jni_CallObjectMethod,
3530 jni_CallObjectMethodV,
3531 jni_CallObjectMethodA,
3532 jni_CallBooleanMethod,
3533 jni_CallBooleanMethodV,
3534 jni_CallBooleanMethodA,
3535 jni_CallByteMethod,
3536 jni_CallByteMethodV,
3537 jni_CallByteMethodA,
3538 jni_CallCharMethod,
3539 jni_CallCharMethodV,
3540 jni_CallCharMethodA,
3541 jni_CallShortMethod,
3542 jni_CallShortMethodV,
3543 jni_CallShortMethodA,
3544 jni_CallIntMethod,
3545 jni_CallIntMethodV,
3546 jni_CallIntMethodA,
3547 jni_CallLongMethod,
3548 jni_CallLongMethodV,
3549 jni_CallLongMethodA,
3550 jni_CallFloatMethod,
3551 jni_CallFloatMethodV,
3552 jni_CallFloatMethodA,
3553 jni_CallDoubleMethod,
3554 jni_CallDoubleMethodV,
3555 jni_CallDoubleMethodA,
3556 jni_CallVoidMethod,
3557 jni_CallVoidMethodV,
3558 jni_CallVoidMethodA,
3559
3560 jni_CallNonvirtualObjectMethod,
3561 jni_CallNonvirtualObjectMethodV,
3562 jni_CallNonvirtualObjectMethodA,
3563 jni_CallNonvirtualBooleanMethod,
3564 jni_CallNonvirtualBooleanMethodV,
3565 jni_CallNonvirtualBooleanMethodA,
3566 jni_CallNonvirtualByteMethod,
3567 jni_CallNonvirtualByteMethodV,
3568 jni_CallNonvirtualByteMethodA,
3569 jni_CallNonvirtualCharMethod,
3570 jni_CallNonvirtualCharMethodV,
3571 jni_CallNonvirtualCharMethodA,
3572 jni_CallNonvirtualShortMethod,
3573 jni_CallNonvirtualShortMethodV,
3574 jni_CallNonvirtualShortMethodA,
3575 jni_CallNonvirtualIntMethod,
3576 jni_CallNonvirtualIntMethodV,
3577 jni_CallNonvirtualIntMethodA,
3578 jni_CallNonvirtualLongMethod,
3579 jni_CallNonvirtualLongMethodV,
3580 jni_CallNonvirtualLongMethodA,
3581 jni_CallNonvirtualFloatMethod,
3582 jni_CallNonvirtualFloatMethodV,
3583 jni_CallNonvirtualFloatMethodA,
3584 jni_CallNonvirtualDoubleMethod,
3585 jni_CallNonvirtualDoubleMethodV,
3586 jni_CallNonvirtualDoubleMethodA,
3587 jni_CallNonvirtualVoidMethod,
3588 jni_CallNonvirtualVoidMethodV,
3589 jni_CallNonvirtualVoidMethodA,
3590
3591 jni_GetFieldID,
3592
3593 jni_GetObjectField,
3594 jni_GetBooleanField,
3595 jni_GetByteField,
3596 jni_GetCharField,
3597 jni_GetShortField,
3598 jni_GetIntField,
3599 jni_GetLongField,
3600 jni_GetFloatField,
3601 jni_GetDoubleField,
3602
3603 jni_SetObjectField,
3604 jni_SetBooleanField,
3605 jni_SetByteField,
3606 jni_SetCharField,
3607 jni_SetShortField,
3608 jni_SetIntField,
3609 jni_SetLongField,
3610 jni_SetFloatField,
3611 jni_SetDoubleField,
3612
3613 jni_GetStaticMethodID,
3614
3615 jni_CallStaticObjectMethod,
3616 jni_CallStaticObjectMethodV,
3617 jni_CallStaticObjectMethodA,
3618 jni_CallStaticBooleanMethod,
3619 jni_CallStaticBooleanMethodV,
3620 jni_CallStaticBooleanMethodA,
3621 jni_CallStaticByteMethod,
3622 jni_CallStaticByteMethodV,
3623 jni_CallStaticByteMethodA,
3624 jni_CallStaticCharMethod,
3625 jni_CallStaticCharMethodV,
3626 jni_CallStaticCharMethodA,
3627 jni_CallStaticShortMethod,
3628 jni_CallStaticShortMethodV,
3629 jni_CallStaticShortMethodA,
3630 jni_CallStaticIntMethod,
3631 jni_CallStaticIntMethodV,
3632 jni_CallStaticIntMethodA,
3633 jni_CallStaticLongMethod,
3634 jni_CallStaticLongMethodV,
3635 jni_CallStaticLongMethodA,
3636 jni_CallStaticFloatMethod,
3637 jni_CallStaticFloatMethodV,
3638 jni_CallStaticFloatMethodA,
3639 jni_CallStaticDoubleMethod,
3640 jni_CallStaticDoubleMethodV,
3641 jni_CallStaticDoubleMethodA,
3642 jni_CallStaticVoidMethod,
3643 jni_CallStaticVoidMethodV,
3644 jni_CallStaticVoidMethodA,
3645
3646 jni_GetStaticFieldID,
3647
3648 jni_GetStaticObjectField,
3649 jni_GetStaticBooleanField,
3650 jni_GetStaticByteField,
3651 jni_GetStaticCharField,
3652 jni_GetStaticShortField,
3653 jni_GetStaticIntField,
3654 jni_GetStaticLongField,
3655 jni_GetStaticFloatField,
3656 jni_GetStaticDoubleField,
3657
3658 jni_SetStaticObjectField,
3659 jni_SetStaticBooleanField,
3660 jni_SetStaticByteField,
3661 jni_SetStaticCharField,
3662 jni_SetStaticShortField,
3663 jni_SetStaticIntField,
3664 jni_SetStaticLongField,
3665 jni_SetStaticFloatField,
3666 jni_SetStaticDoubleField,
3667
3668 jni_NewString,
3669 jni_GetStringLength,
3670 jni_GetStringChars,
3671 jni_ReleaseStringChars,
3672
3673 jni_NewStringUTF,
3674 jni_GetStringUTFLength,
3675 jni_GetStringUTFChars,
3676 jni_ReleaseStringUTFChars,
3677
3678 jni_GetArrayLength,
3679
3680 jni_NewObjectArray,
3681 jni_GetObjectArrayElement,
3682 jni_SetObjectArrayElement,
3683
3684 jni_NewBooleanArray,
3685 jni_NewByteArray,
3686 jni_NewCharArray,
3687 jni_NewShortArray,
3688 jni_NewIntArray,
3689 jni_NewLongArray,
3690 jni_NewFloatArray,
3691 jni_NewDoubleArray,
3692
3693 jni_GetBooleanArrayElements,
3694 jni_GetByteArrayElements,
3695 jni_GetCharArrayElements,
3696 jni_GetShortArrayElements,
3697 jni_GetIntArrayElements,
3698 jni_GetLongArrayElements,
3699 jni_GetFloatArrayElements,
3700 jni_GetDoubleArrayElements,
3701
3702 jni_ReleaseBooleanArrayElements,
3703 jni_ReleaseByteArrayElements,
3704 jni_ReleaseCharArrayElements,
3705 jni_ReleaseShortArrayElements,
3706 jni_ReleaseIntArrayElements,
3707 jni_ReleaseLongArrayElements,
3708 jni_ReleaseFloatArrayElements,
3709 jni_ReleaseDoubleArrayElements,
3710
3711 jni_GetBooleanArrayRegion,
3712 jni_GetByteArrayRegion,
3713 jni_GetCharArrayRegion,
3714 jni_GetShortArrayRegion,
3715 jni_GetIntArrayRegion,
3716 jni_GetLongArrayRegion,
3717 jni_GetFloatArrayRegion,
3718 jni_GetDoubleArrayRegion,
3719
3720 jni_SetBooleanArrayRegion,
3721 jni_SetByteArrayRegion,
3722 jni_SetCharArrayRegion,
3723 jni_SetShortArrayRegion,
3724 jni_SetIntArrayRegion,
3725 jni_SetLongArrayRegion,
3726 jni_SetFloatArrayRegion,
3727 jni_SetDoubleArrayRegion,
3728
3729 jni_RegisterNatives,
3730 jni_UnregisterNatives,
3731
3732 jni_MonitorEnter,
3733 jni_MonitorExit,
3734
3735 jni_GetJavaVM,
3736
3737 jni_GetStringRegion,
3738 jni_GetStringUTFRegion,
3739
3740 jni_GetPrimitiveArrayCritical,
3741 jni_ReleasePrimitiveArrayCritical,
3742
3743 jni_GetStringCritical,
3744 jni_ReleaseStringCritical,
3745
3746 jni_NewWeakGlobalRef,
3747 jni_DeleteWeakGlobalRef,
3748
3749 jni_ExceptionCheck,
3750
3751 jni_NewDirectByteBuffer,
3752 jni_GetDirectBufferAddress,
3753 jni_GetDirectBufferCapacity,
3754
3755 // New 1_6 features
3756
3757 jni_GetObjectRefType,
3758
3759 // Module features
3760
3761 jni_GetModule
3762 };
3763
3764
3765 // For jvmti use to modify jni function table.
3766 // Java threads in native contiues to run until it is transitioned
3767 // to VM at safepoint. Before the transition or before it is blocked
3768 // for safepoint it may access jni function table. VM could crash if
3769 // any java thread access the jni function table in the middle of memcpy.
3770 // To avoid this each function pointers are copied automically.
3771 void copy_jni_function_table(const struct JNINativeInterface_ *new_jni_NativeInterface) {
3772 assert(SafepointSynchronize::is_at_safepoint(), "must be at safepoint");
3773 intptr_t *a = (intptr_t *) jni_functions();
3774 intptr_t *b = (intptr_t *) new_jni_NativeInterface;
3775 for (uint i=0; i < sizeof(struct JNINativeInterface_)/sizeof(void *); i++) {
3776 Atomic::store_ptr(*b++, a++);
3777 }
3778 }
3779
3780 void quicken_jni_functions() {
3781 // Replace Get<Primitive>Field with fast versions
3782 if (UseFastJNIAccessors && !JvmtiExport::can_post_field_access()
3783 && !VerifyJNIFields && !CountJNICalls && !CheckJNICalls
3784 #if defined(_WINDOWS) && defined(IA32) && defined(COMPILER2)
3785 // windows x86 currently needs SEH wrapper and the gain of the fast
3786 // versions currently isn't certain for server vm on uniprocessor.
3787 && os::is_MP()
3788 #endif
3789 ) {
3790 address func;
3791 func = JNI_FastGetField::generate_fast_get_boolean_field();
3792 if (func != (address)-1) {
3793 jni_NativeInterface.GetBooleanField = (GetBooleanField_t)func;
3794 }
3795 func = JNI_FastGetField::generate_fast_get_byte_field();
3796 if (func != (address)-1) {
3797 jni_NativeInterface.GetByteField = (GetByteField_t)func;
3798 }
3799 func = JNI_FastGetField::generate_fast_get_char_field();
3800 if (func != (address)-1) {
3801 jni_NativeInterface.GetCharField = (GetCharField_t)func;
3802 }
3803 func = JNI_FastGetField::generate_fast_get_short_field();
3804 if (func != (address)-1) {
3805 jni_NativeInterface.GetShortField = (GetShortField_t)func;
3806 }
3807 func = JNI_FastGetField::generate_fast_get_int_field();
3808 if (func != (address)-1) {
3809 jni_NativeInterface.GetIntField = (GetIntField_t)func;
3810 }
3811 func = JNI_FastGetField::generate_fast_get_long_field();
3812 if (func != (address)-1) {
3813 jni_NativeInterface.GetLongField = (GetLongField_t)func;
3814 }
3815 func = JNI_FastGetField::generate_fast_get_float_field();
3816 if (func != (address)-1) {
3817 jni_NativeInterface.GetFloatField = (GetFloatField_t)func;
3818 }
3819 func = JNI_FastGetField::generate_fast_get_double_field();
3820 if (func != (address)-1) {
3821 jni_NativeInterface.GetDoubleField = (GetDoubleField_t)func;
3822 }
3823 }
3824 }
3825
3826 // Returns the function structure
3827 struct JNINativeInterface_* jni_functions() {
3828 #if INCLUDE_JNI_CHECK
3829 if (CheckJNICalls) return jni_functions_check();
3830 #endif // INCLUDE_JNI_CHECK
3831 return &jni_NativeInterface;
3832 }
3833
3834 // Returns the function structure
3835 struct JNINativeInterface_* jni_functions_nocheck() {
3836 return &jni_NativeInterface;
3837 }
3838
3839
3840 // Invocation API
3841
3842
3843 // Forward declaration
3844 extern const struct JNIInvokeInterface_ jni_InvokeInterface;
3845
3846 // Global invocation API vars
3847 volatile jint vm_created = 0;
3848 // Indicate whether it is safe to recreate VM
3849 volatile jint safe_to_recreate_vm = 1;
3850 struct JavaVM_ main_vm = {&jni_InvokeInterface};
3851
3852
3853 #define JAVASTACKSIZE (400 * 1024) /* Default size of a thread java stack */
3854 enum { VERIFY_NONE, VERIFY_REMOTE, VERIFY_ALL };
3855
3856 DT_RETURN_MARK_DECL(GetDefaultJavaVMInitArgs, jint
3857 , HOTSPOT_JNI_GETDEFAULTJAVAVMINITARGS_RETURN(_ret_ref));
3858
3859 _JNI_IMPORT_OR_EXPORT_ jint JNICALL JNI_GetDefaultJavaVMInitArgs(void *args_) {
3860 HOTSPOT_JNI_GETDEFAULTJAVAVMINITARGS_ENTRY(args_);
3861 JDK1_1InitArgs *args = (JDK1_1InitArgs *)args_;
3862 jint ret = JNI_ERR;
3863 DT_RETURN_MARK(GetDefaultJavaVMInitArgs, jint, (const jint&)ret);
3864
3865 if (Threads::is_supported_jni_version(args->version)) {
3866 ret = JNI_OK;
3867 }
3868 // 1.1 style no longer supported in hotspot.
3869 // According the JNI spec, we should update args->version on return.
3870 // We also use the structure to communicate with launcher about default
3871 // stack size.
3872 if (args->version == JNI_VERSION_1_1) {
3873 args->version = JNI_VERSION_1_2;
3874 // javaStackSize is int in arguments structure
3875 assert(jlong(ThreadStackSize) * K < INT_MAX, "integer overflow");
3876 args->javaStackSize = (jint)(ThreadStackSize * K);
3877 }
3878 return ret;
3879 }
3880
3881 DT_RETURN_MARK_DECL(CreateJavaVM, jint
3882 , HOTSPOT_JNI_CREATEJAVAVM_RETURN(_ret_ref));
3883
3884 static jint JNI_CreateJavaVM_inner(JavaVM **vm, void **penv, void *args) {
3885 HOTSPOT_JNI_CREATEJAVAVM_ENTRY((void **) vm, penv, args);
3886
3887 jint result = JNI_ERR;
3888 DT_RETURN_MARK(CreateJavaVM, jint, (const jint&)result);
3889
3890 // We're about to use Atomic::xchg for synchronization. Some Zero
3891 // platforms use the GCC builtin __sync_lock_test_and_set for this,
3892 // but __sync_lock_test_and_set is not guaranteed to do what we want
3893 // on all architectures. So we check it works before relying on it.
3894 #if defined(ZERO) && defined(ASSERT)
3895 {
3896 jint a = 0xcafebabe;
3897 jint b = Atomic::xchg(0xdeadbeef, &a);
3898 void *c = &a;
3899 void *d = Atomic::xchg_ptr(&b, &c);
3900 assert(a == (jint) 0xdeadbeef && b == (jint) 0xcafebabe, "Atomic::xchg() works");
3901 assert(c == &b && d == &a, "Atomic::xchg_ptr() works");
3902 }
3903 #endif // ZERO && ASSERT
3904
3905 // At the moment it's only possible to have one Java VM,
3906 // since some of the runtime state is in global variables.
3907
3908 // We cannot use our mutex locks here, since they only work on
3909 // Threads. We do an atomic compare and exchange to ensure only
3910 // one thread can call this method at a time
3911
3912 // We use Atomic::xchg rather than Atomic::add/dec since on some platforms
3913 // the add/dec implementations are dependent on whether we are running
3914 // on a multiprocessor, and at this stage of initialization the os::is_MP
3915 // function used to determine this will always return false. Atomic::xchg
3916 // does not have this problem.
3917 if (Atomic::xchg(1, &vm_created) == 1) {
3918 return JNI_EEXIST; // already created, or create attempt in progress
3919 }
3920 if (Atomic::xchg(0, &safe_to_recreate_vm) == 0) {
3921 return JNI_ERR; // someone tried and failed and retry not allowed.
3922 }
3923
3924 assert(vm_created == 1, "vm_created is true during the creation");
3925
3926 /**
3927 * Certain errors during initialization are recoverable and do not
3928 * prevent this method from being called again at a later time
3929 * (perhaps with different arguments). However, at a certain
3930 * point during initialization if an error occurs we cannot allow
3931 * this function to be called again (or it will crash). In those
3932 * situations, the 'canTryAgain' flag is set to false, which atomically
3933 * sets safe_to_recreate_vm to 1, such that any new call to
3934 * JNI_CreateJavaVM will immediately fail using the above logic.
3935 */
3936 bool can_try_again = true;
3937
3938 result = Threads::create_vm((JavaVMInitArgs*) args, &can_try_again);
3939 if (result == JNI_OK) {
3940 JavaThread *thread = JavaThread::current();
3941 assert(!thread->has_pending_exception(), "should have returned not OK");
3942 /* thread is thread_in_vm here */
3943 *vm = (JavaVM *)(&main_vm);
3944 *(JNIEnv**)penv = thread->jni_environment();
3945
3946 #if INCLUDE_JVMCI
3947 if (EnableJVMCI) {
3948 if (UseJVMCICompiler) {
3949 // JVMCI is initialized on a CompilerThread
3950 if (BootstrapJVMCI) {
3951 JavaThread* THREAD = thread;
3952 JVMCICompiler* compiler = JVMCICompiler::instance(CATCH);
3953 compiler->bootstrap(THREAD);
3954 if (HAS_PENDING_EXCEPTION) {
3955 HandleMark hm;
3956 vm_exit_during_initialization(Handle(THREAD, PENDING_EXCEPTION));
3957 }
3958 }
3959 }
3960 }
3961 #endif
3962
3963 // Tracks the time application was running before GC
3964 RuntimeService::record_application_start();
3965
3966 // Notify JVMTI
3967 if (JvmtiExport::should_post_thread_life()) {
3968 JvmtiExport::post_thread_start(thread);
3969 }
3970
3971 EventThreadStart event;
3972 if (event.should_commit()) {
3973 event.set_thread(THREAD_TRACE_ID(thread));
3974 event.commit();
3975 }
3976
3977 #ifndef PRODUCT
3978 // Check if we should compile all classes on bootclasspath
3979 if (CompileTheWorld) ClassLoader::compile_the_world();
3980 if (ReplayCompiles) ciReplay::replay(thread);
3981
3982 // Some platforms (like Win*) need a wrapper around these test
3983 // functions in order to properly handle error conditions.
3984 test_error_handler();
3985 if (ExecuteInternalVMTests) {
3986 InternalVMTests::run();
3987 }
3988 #endif
3989
3990 // Since this is not a JVM_ENTRY we have to set the thread state manually before leaving.
3991 ThreadStateTransition::transition_and_fence(thread, _thread_in_vm, _thread_in_native);
3992 } else {
3993 // If create_vm exits because of a pending exception, exit with that
3994 // exception. In the future when we figure out how to reclaim memory,
3995 // we may be able to exit with JNI_ERR and allow the calling application
3996 // to continue.
3997 if (Universe::is_fully_initialized()) {
3998 // otherwise no pending exception possible - VM will already have aborted
3999 JavaThread* THREAD = JavaThread::current();
4000 if (HAS_PENDING_EXCEPTION) {
4001 HandleMark hm;
4002 vm_exit_during_initialization(Handle(THREAD, PENDING_EXCEPTION));
4003 }
4004 }
4005
4006 if (can_try_again) {
4007 // reset safe_to_recreate_vm to 1 so that retrial would be possible
4008 safe_to_recreate_vm = 1;
4009 }
4010
4011 // Creation failed. We must reset vm_created
4012 *vm = 0;
4013 *(JNIEnv**)penv = 0;
4014 // reset vm_created last to avoid race condition. Use OrderAccess to
4015 // control both compiler and architectural-based reordering.
4016 OrderAccess::release_store(&vm_created, 0);
4017 }
4018
4019 // Flush stdout and stderr before exit.
4020 fflush(stdout);
4021 fflush(stderr);
4022
4023 return result;
4024
4025 }
4026
4027 _JNI_IMPORT_OR_EXPORT_ jint JNICALL JNI_CreateJavaVM(JavaVM **vm, void **penv, void *args) {
4028 jint result = 0;
4029 // On Windows, let CreateJavaVM run with SEH protection
4030 #ifdef _WIN32
4031 __try {
4032 #endif
4033 result = JNI_CreateJavaVM_inner(vm, penv, args);
4034 #ifdef _WIN32
4035 } __except(topLevelExceptionFilter((_EXCEPTION_POINTERS*)_exception_info())) {
4036 // Nothing to do.
4037 }
4038 #endif
4039 return result;
4040 }
4041
4042 _JNI_IMPORT_OR_EXPORT_ jint JNICALL JNI_GetCreatedJavaVMs(JavaVM **vm_buf, jsize bufLen, jsize *numVMs) {
4043 // See bug 4367188, the wrapper can sometimes cause VM crashes
4044 // JNIWrapper("GetCreatedJavaVMs");
4045
4046 HOTSPOT_JNI_GETCREATEDJAVAVMS_ENTRY((void **) vm_buf, bufLen, (uintptr_t *) numVMs);
4047
4048 if (vm_created) {
4049 if (numVMs != NULL) *numVMs = 1;
4050 if (bufLen > 0) *vm_buf = (JavaVM *)(&main_vm);
4051 } else {
4052 if (numVMs != NULL) *numVMs = 0;
4053 }
4054 HOTSPOT_JNI_GETCREATEDJAVAVMS_RETURN(JNI_OK);
4055 return JNI_OK;
4056 }
4057
4058 extern "C" {
4059
4060 DT_RETURN_MARK_DECL(DestroyJavaVM, jint
4061 , HOTSPOT_JNI_DESTROYJAVAVM_RETURN(_ret_ref));
4062
4063 jint JNICALL jni_DestroyJavaVM(JavaVM *vm) {
4064 HOTSPOT_JNI_DESTROYJAVAVM_ENTRY(vm);
4065 jint res = JNI_ERR;
4066 DT_RETURN_MARK(DestroyJavaVM, jint, (const jint&)res);
4067
4068 if (!vm_created) {
4069 res = JNI_ERR;
4070 return res;
4071 }
4072
4073 JNIWrapper("DestroyJavaVM");
4074 JNIEnv *env;
4075 JavaVMAttachArgs destroyargs;
4076 destroyargs.version = CurrentVersion;
4077 destroyargs.name = (char *)"DestroyJavaVM";
4078 destroyargs.group = NULL;
4079 res = vm->AttachCurrentThread((void **)&env, (void *)&destroyargs);
4080 if (res != JNI_OK) {
4081 return res;
4082 }
4083
4084 // Since this is not a JVM_ENTRY we have to set the thread state manually before entering.
4085 JavaThread* thread = JavaThread::current();
4086 ThreadStateTransition::transition_from_native(thread, _thread_in_vm);
4087 if (Threads::destroy_vm()) {
4088 // Should not change thread state, VM is gone
4089 vm_created = false;
4090 res = JNI_OK;
4091 return res;
4092 } else {
4093 ThreadStateTransition::transition_and_fence(thread, _thread_in_vm, _thread_in_native);
4094 res = JNI_ERR;
4095 return res;
4096 }
4097 }
4098
4099
4100 static jint attach_current_thread(JavaVM *vm, void **penv, void *_args, bool daemon) {
4101 JavaVMAttachArgs *args = (JavaVMAttachArgs *) _args;
4102
4103 // Check below commented out from JDK1.2fcs as well
4104 /*
4105 if (args && (args->version != JNI_VERSION_1_1 || args->version != JNI_VERSION_1_2)) {
4106 return JNI_EVERSION;
4107 }
4108 */
4109
4110 Thread* t = Thread::current_or_null();
4111 if (t != NULL) {
4112 // If the thread has been attached this operation is a no-op
4113 *(JNIEnv**)penv = ((JavaThread*) t)->jni_environment();
4114 return JNI_OK;
4115 }
4116
4117 // Create a thread and mark it as attaching so it will be skipped by the
4118 // ThreadsListEnumerator - see CR 6404306
4119 JavaThread* thread = new JavaThread(true);
4120
4121 // Set correct safepoint info. The thread is going to call into Java when
4122 // initializing the Java level thread object. Hence, the correct state must
4123 // be set in order for the Safepoint code to deal with it correctly.
4124 thread->set_thread_state(_thread_in_vm);
4125 thread->record_stack_base_and_size();
4126 thread->initialize_thread_current();
4127
4128 if (!os::create_attached_thread(thread)) {
4129 delete thread;
4130 return JNI_ERR;
4131 }
4132 // Enable stack overflow checks
4133 thread->create_stack_guard_pages();
4134
4135 thread->initialize_tlab();
4136
4137 thread->cache_global_variables();
4138
4139 // Crucial that we do not have a safepoint check for this thread, since it has
4140 // not been added to the Thread list yet.
4141 { Threads_lock->lock_without_safepoint_check();
4142 // This must be inside this lock in order to get FullGCALot to work properly, i.e., to
4143 // avoid this thread trying to do a GC before it is added to the thread-list
4144 thread->set_active_handles(JNIHandleBlock::allocate_block());
4145 Threads::add(thread, daemon);
4146 Threads_lock->unlock();
4147 }
4148 // Create thread group and name info from attach arguments
4149 oop group = NULL;
4150 char* thread_name = NULL;
4151 if (args != NULL && Threads::is_supported_jni_version(args->version)) {
4152 group = JNIHandles::resolve(args->group);
4153 thread_name = args->name; // may be NULL
4154 }
4155 if (group == NULL) group = Universe::main_thread_group();
4156
4157 // Create Java level thread object and attach it to this thread
4158 bool attach_failed = false;
4159 {
4160 EXCEPTION_MARK;
4161 HandleMark hm(THREAD);
4162 Handle thread_group(THREAD, group);
4163 thread->allocate_threadObj(thread_group, thread_name, daemon, THREAD);
4164 if (HAS_PENDING_EXCEPTION) {
4165 CLEAR_PENDING_EXCEPTION;
4166 // cleanup outside the handle mark.
4167 attach_failed = true;
4168 }
4169 }
4170
4171 if (attach_failed) {
4172 // Added missing cleanup
4173 thread->cleanup_failed_attach_current_thread();
4174 return JNI_ERR;
4175 }
4176
4177 // mark the thread as no longer attaching
4178 // this uses a fence to push the change through so we don't have
4179 // to regrab the threads_lock
4180 thread->set_done_attaching_via_jni();
4181
4182 // Set java thread status.
4183 java_lang_Thread::set_thread_status(thread->threadObj(),
4184 java_lang_Thread::RUNNABLE);
4185
4186 // Notify the debugger
4187 if (JvmtiExport::should_post_thread_life()) {
4188 JvmtiExport::post_thread_start(thread);
4189 }
4190
4191 EventThreadStart event;
4192 if (event.should_commit()) {
4193 event.set_thread(THREAD_TRACE_ID(thread));
4194 event.commit();
4195 }
4196
4197 *(JNIEnv**)penv = thread->jni_environment();
4198
4199 // Now leaving the VM, so change thread_state. This is normally automatically taken care
4200 // of in the JVM_ENTRY. But in this situation we have to do it manually. Notice, that by
4201 // using ThreadStateTransition::transition, we do a callback to the safepoint code if
4202 // needed.
4203
4204 ThreadStateTransition::transition_and_fence(thread, _thread_in_vm, _thread_in_native);
4205
4206 // Perform any platform dependent FPU setup
4207 os::setup_fpu();
4208
4209 return JNI_OK;
4210 }
4211
4212
4213 jint JNICALL jni_AttachCurrentThread(JavaVM *vm, void **penv, void *_args) {
4214 HOTSPOT_JNI_ATTACHCURRENTTHREAD_ENTRY(vm, penv, _args);
4215 if (!vm_created) {
4216 HOTSPOT_JNI_ATTACHCURRENTTHREAD_RETURN((uint32_t) JNI_ERR);
4217 return JNI_ERR;
4218 }
4219
4220 JNIWrapper("AttachCurrentThread");
4221 jint ret = attach_current_thread(vm, penv, _args, false);
4222 HOTSPOT_JNI_ATTACHCURRENTTHREAD_RETURN(ret);
4223 return ret;
4224 }
4225
4226
4227 jint JNICALL jni_DetachCurrentThread(JavaVM *vm) {
4228 HOTSPOT_JNI_DETACHCURRENTTHREAD_ENTRY(vm);
4229 VM_Exit::block_if_vm_exited();
4230
4231 JNIWrapper("DetachCurrentThread");
4232
4233 // If the thread has already been detached the operation is a no-op
4234 if (Thread::current_or_null() == NULL) {
4235 HOTSPOT_JNI_DETACHCURRENTTHREAD_RETURN(JNI_OK);
4236 return JNI_OK;
4237 }
4238
4239 JavaThread* thread = JavaThread::current();
4240 if (thread->has_last_Java_frame()) {
4241 HOTSPOT_JNI_DETACHCURRENTTHREAD_RETURN((uint32_t) JNI_ERR);
4242 // Can't detach a thread that's running java, that can't work.
4243 return JNI_ERR;
4244 }
4245
4246 // Safepoint support. Have to do call-back to safepoint code, if in the
4247 // middel of a safepoint operation
4248 ThreadStateTransition::transition_from_native(thread, _thread_in_vm);
4249
4250 // XXX: Note that JavaThread::exit() call below removes the guards on the
4251 // stack pages set up via enable_stack_{red,yellow}_zone() calls
4252 // above in jni_AttachCurrentThread. Unfortunately, while the setting
4253 // of the guards is visible in jni_AttachCurrentThread above,
4254 // the removal of the guards is buried below in JavaThread::exit()
4255 // here. The abstraction should be more symmetrically either exposed
4256 // or hidden (e.g. it could probably be hidden in the same
4257 // (platform-dependent) methods where we do alternate stack
4258 // maintenance work?)
4259 thread->exit(false, JavaThread::jni_detach);
4260 delete thread;
4261
4262 HOTSPOT_JNI_DETACHCURRENTTHREAD_RETURN(JNI_OK);
4263 return JNI_OK;
4264 }
4265
4266 DT_RETURN_MARK_DECL(GetEnv, jint
4267 , HOTSPOT_JNI_GETENV_RETURN(_ret_ref));
4268
4269 jint JNICALL jni_GetEnv(JavaVM *vm, void **penv, jint version) {
4270 HOTSPOT_JNI_GETENV_ENTRY(vm, penv, version);
4271 jint ret = JNI_ERR;
4272 DT_RETURN_MARK(GetEnv, jint, (const jint&)ret);
4273
4274 if (!vm_created) {
4275 *penv = NULL;
4276 ret = JNI_EDETACHED;
4277 return ret;
4278 }
4279
4280 if (JniExportedInterface::GetExportedInterface(vm, penv, version, &ret)) {
4281 return ret;
4282 }
4283
4284 #ifndef JVMPI_VERSION_1
4285 // need these in order to be polite about older agents
4286 #define JVMPI_VERSION_1 ((jint)0x10000001)
4287 #define JVMPI_VERSION_1_1 ((jint)0x10000002)
4288 #define JVMPI_VERSION_1_2 ((jint)0x10000003)
4289 #endif // !JVMPI_VERSION_1
4290
4291 Thread* thread = Thread::current_or_null();
4292 if (thread != NULL && thread->is_Java_thread()) {
4293 if (Threads::is_supported_jni_version_including_1_1(version)) {
4294 *(JNIEnv**)penv = ((JavaThread*) thread)->jni_environment();
4295 ret = JNI_OK;
4296 return ret;
4297
4298 } else if (version == JVMPI_VERSION_1 ||
4299 version == JVMPI_VERSION_1_1 ||
4300 version == JVMPI_VERSION_1_2) {
4301 tty->print_cr("ERROR: JVMPI, an experimental interface, is no longer supported.");
4302 tty->print_cr("Please use the supported interface: the JVM Tool Interface (JVM TI).");
4303 ret = JNI_EVERSION;
4304 return ret;
4305 } else if (JvmtiExport::is_jvmdi_version(version)) {
4306 tty->print_cr("FATAL ERROR: JVMDI is no longer supported.");
4307 tty->print_cr("Please use the supported interface: the JVM Tool Interface (JVM TI).");
4308 ret = JNI_EVERSION;
4309 return ret;
4310 } else {
4311 *penv = NULL;
4312 ret = JNI_EVERSION;
4313 return ret;
4314 }
4315 } else {
4316 *penv = NULL;
4317 ret = JNI_EDETACHED;
4318 return ret;
4319 }
4320 }
4321
4322
4323 jint JNICALL jni_AttachCurrentThreadAsDaemon(JavaVM *vm, void **penv, void *_args) {
4324 HOTSPOT_JNI_ATTACHCURRENTTHREADASDAEMON_ENTRY(vm, penv, _args);
4325 if (!vm_created) {
4326 HOTSPOT_JNI_ATTACHCURRENTTHREADASDAEMON_RETURN((uint32_t) JNI_ERR);
4327 return JNI_ERR;
4328 }
4329
4330 JNIWrapper("AttachCurrentThreadAsDaemon");
4331 jint ret = attach_current_thread(vm, penv, _args, true);
4332 HOTSPOT_JNI_ATTACHCURRENTTHREADASDAEMON_RETURN(ret);
4333 return ret;
4334 }
4335
4336
4337 } // End extern "C"
4338
4339 const struct JNIInvokeInterface_ jni_InvokeInterface = {
4340 NULL,
4341 NULL,
4342 NULL,
4343
4344 jni_DestroyJavaVM,
4345 jni_AttachCurrentThread,
4346 jni_DetachCurrentThread,
4347 jni_GetEnv,
4348 jni_AttachCurrentThreadAsDaemon
4349 };