1 /*
2 * Copyright (c) 1997, 2017, 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() { _arguments->push_jobject(va_arg(_ap, jobject)); }
939
940 inline void set_ap(va_list rap) {
941 va_copy(_ap, rap);
942 }
943
944 public:
945 JNI_ArgumentPusherVaArg(Symbol* signature, va_list rap)
946 : JNI_ArgumentPusher(signature) {
947 set_ap(rap);
948 }
949 JNI_ArgumentPusherVaArg(jmethodID method_id, va_list rap)
950 : JNI_ArgumentPusher(Method::resolve_jmethod_id(method_id)->signature()) {
951 set_ap(rap);
952 }
953
954 // Optimized path if we have the bitvector form of signature
955 void iterate( uint64_t fingerprint ) {
956 if (fingerprint == (uint64_t)CONST64(-1)) {
957 SignatureIterator::iterate(); // Must be too many arguments
958 } else {
959 _return_type = (BasicType)((fingerprint >> static_feature_size) &
960 result_feature_mask);
961
962 assert(fingerprint, "Fingerprint should not be 0");
963 fingerprint = fingerprint >> (static_feature_size + result_feature_size);
964 while ( 1 ) {
965 switch ( fingerprint & parameter_feature_mask ) {
966 case bool_parm:
967 get_bool();
968 break;
969 case char_parm:
970 get_char();
971 break;
972 case short_parm:
973 get_short();
974 break;
975 case byte_parm:
976 get_byte();
977 break;
978 case int_parm:
979 get_int();
980 break;
981 case obj_parm:
982 get_object();
983 break;
984 case long_parm:
985 get_long();
986 break;
987 case float_parm:
988 get_float();
989 break;
990 case double_parm:
991 get_double();
992 break;
993 case done_parm:
994 return;
995 break;
996 default:
997 ShouldNotReachHere();
998 break;
999 }
1000 fingerprint >>= parameter_feature_size;
1001 }
1002 }
1003 }
1004 };
1005
1006
1007 class JNI_ArgumentPusherArray : public JNI_ArgumentPusher {
1008 protected:
1009 const jvalue *_ap;
1010
1011 inline void get_bool() {
1012 // Normalize boolean arguments from native code by converting 1-255 to JNI_TRUE and
1013 // 0 to JNI_FALSE. Boolean return values from native are normalized the same in
1014 // TemplateInterpreterGenerator::generate_result_handler_for and
1015 // SharedRuntime::generate_native_wrapper.
1016 jboolean b = (_ap++)->z;
1017 _arguments->push_int((jint)(b == 0 ? JNI_FALSE : JNI_TRUE));
1018 }
1019 inline void get_char() { _arguments->push_int((jint)(_ap++)->c); }
1020 inline void get_short() { _arguments->push_int((jint)(_ap++)->s); }
1021 inline void get_byte() { _arguments->push_int((jint)(_ap++)->b); }
1022 inline void get_int() { _arguments->push_int((jint)(_ap++)->i); }
1023
1024 inline void get_long() { _arguments->push_long((_ap++)->j); }
1025 inline void get_float() { _arguments->push_float((_ap++)->f); }
1026 inline void get_double() { _arguments->push_double((_ap++)->d);}
1027 inline void get_object() { _arguments->push_jobject((_ap++)->l); }
1028
1029 inline void set_ap(const jvalue *rap) { _ap = rap; }
1030
1031 public:
1032 JNI_ArgumentPusherArray(Symbol* signature, const jvalue *rap)
1033 : JNI_ArgumentPusher(signature) {
1034 set_ap(rap);
1035 }
1036 JNI_ArgumentPusherArray(jmethodID method_id, const jvalue *rap)
1037 : JNI_ArgumentPusher(Method::resolve_jmethod_id(method_id)->signature()) {
1038 set_ap(rap);
1039 }
1040
1041 // Optimized path if we have the bitvector form of signature
1042 void iterate( uint64_t fingerprint ) {
1043 if (fingerprint == (uint64_t)CONST64(-1)) {
1044 SignatureIterator::iterate(); // Must be too many arguments
1045 } else {
1046 _return_type = (BasicType)((fingerprint >> static_feature_size) &
1047 result_feature_mask);
1048 assert(fingerprint, "Fingerprint should not be 0");
1049 fingerprint = fingerprint >> (static_feature_size + result_feature_size);
1050 while ( 1 ) {
1051 switch ( fingerprint & parameter_feature_mask ) {
1052 case bool_parm:
1053 get_bool();
1054 break;
1055 case char_parm:
1056 get_char();
1057 break;
1058 case short_parm:
1059 get_short();
1060 break;
1061 case byte_parm:
1062 get_byte();
1063 break;
1064 case int_parm:
1065 get_int();
1066 break;
1067 case obj_parm:
1068 get_object();
1069 break;
1070 case long_parm:
1071 get_long();
1072 break;
1073 case float_parm:
1074 get_float();
1075 break;
1076 case double_parm:
1077 get_double();
1078 break;
1079 case done_parm:
1080 return;
1081 break;
1082 default:
1083 ShouldNotReachHere();
1084 break;
1085 }
1086 fingerprint >>= parameter_feature_size;
1087 }
1088 }
1089 }
1090 };
1091
1092
1093 enum JNICallType {
1094 JNI_STATIC,
1095 JNI_VIRTUAL,
1096 JNI_NONVIRTUAL
1097 };
1098
1099
1100
1101 static void jni_invoke_static(JNIEnv *env, JavaValue* result, jobject receiver, JNICallType call_type, jmethodID method_id, JNI_ArgumentPusher *args, TRAPS) {
1102 methodHandle method(THREAD, Method::resolve_jmethod_id(method_id));
1103
1104 // Create object to hold arguments for the JavaCall, and associate it with
1105 // the jni parser
1106 ResourceMark rm(THREAD);
1107 int number_of_parameters = method->size_of_parameters();
1108 JavaCallArguments java_args(number_of_parameters);
1109 args->set_java_argument_object(&java_args);
1110
1111 assert(method->is_static(), "method should be static");
1112
1113 // Fill out JavaCallArguments object
1114 args->iterate( Fingerprinter(method).fingerprint() );
1115 // Initialize result type
1116 result->set_type(args->get_ret_type());
1117
1118 // Invoke the method. Result is returned as oop.
1119 JavaCalls::call(result, method, &java_args, CHECK);
1120
1121 // Convert result
1122 if (result->get_type() == T_OBJECT || result->get_type() == T_ARRAY) {
1123 result->set_jobject(JNIHandles::make_local(env, (oop) result->get_jobject()));
1124 }
1125 }
1126
1127
1128 static void jni_invoke_nonstatic(JNIEnv *env, JavaValue* result, jobject receiver, JNICallType call_type, jmethodID method_id, JNI_ArgumentPusher *args, TRAPS) {
1129 oop recv = JNIHandles::resolve(receiver);
1130 if (recv == NULL) {
1131 THROW(vmSymbols::java_lang_NullPointerException());
1132 }
1133 Handle h_recv(THREAD, recv);
1134
1135 int number_of_parameters;
1136 Method* selected_method;
1137 {
1138 Method* m = Method::resolve_jmethod_id(method_id);
1139 number_of_parameters = m->size_of_parameters();
1140 Klass* holder = m->method_holder();
1141 if (call_type != JNI_VIRTUAL) {
1142 selected_method = m;
1143 } else if (!m->has_itable_index()) {
1144 // non-interface call -- for that little speed boost, don't handlize
1145 debug_only(NoSafepointVerifier nosafepoint;)
1146 // jni_GetMethodID makes sure class is linked and initialized
1147 // so m should have a valid vtable index.
1148 assert(m->valid_vtable_index(), "no valid vtable index");
1149 int vtbl_index = m->vtable_index();
1150 if (vtbl_index != Method::nonvirtual_vtable_index) {
1151 selected_method = h_recv->klass()->method_at_vtable(vtbl_index);
1152 } else {
1153 // final method
1154 selected_method = m;
1155 }
1156 } else {
1157 // interface call
1158 KlassHandle h_holder(THREAD, holder);
1159
1160 int itbl_index = m->itable_index();
1161 Klass* k = h_recv->klass();
1162 selected_method = InstanceKlass::cast(k)->method_at_itable(h_holder(), itbl_index, CHECK);
1163 }
1164 }
1165
1166 methodHandle method(THREAD, selected_method);
1167
1168 // Create object to hold arguments for the JavaCall, and associate it with
1169 // the jni parser
1170 ResourceMark rm(THREAD);
1171 JavaCallArguments java_args(number_of_parameters);
1172 args->set_java_argument_object(&java_args);
1173
1174 // handle arguments
1175 assert(!method->is_static(), "method %s should not be static", method->name_and_sig_as_C_string());
1176 args->push_receiver(h_recv); // Push jobject handle
1177
1178 // Fill out JavaCallArguments object
1179 args->iterate( Fingerprinter(method).fingerprint() );
1180 // Initialize result type
1181 result->set_type(args->get_ret_type());
1182
1183 // Invoke the method. Result is returned as oop.
1184 JavaCalls::call(result, method, &java_args, CHECK);
1185
1186 // Convert result
1187 if (result->get_type() == T_OBJECT || result->get_type() == T_ARRAY) {
1188 result->set_jobject(JNIHandles::make_local(env, (oop) result->get_jobject()));
1189 }
1190 }
1191
1192
1193 static instanceOop alloc_object(jclass clazz, TRAPS) {
1194 KlassHandle k(THREAD, java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz)));
1195 if (k == NULL) {
1196 ResourceMark rm(THREAD);
1197 THROW_(vmSymbols::java_lang_InstantiationException(), NULL);
1198 }
1199 k()->check_valid_for_instantiation(false, CHECK_NULL);
1200 InstanceKlass::cast(k())->initialize(CHECK_NULL);
1201 instanceOop ih = InstanceKlass::cast(k())->allocate_instance(THREAD);
1202 return ih;
1203 }
1204
1205 DT_RETURN_MARK_DECL(AllocObject, jobject
1206 , HOTSPOT_JNI_ALLOCOBJECT_RETURN(_ret_ref));
1207
1208 JNI_ENTRY(jobject, jni_AllocObject(JNIEnv *env, jclass clazz))
1209 JNIWrapper("AllocObject");
1210
1211 HOTSPOT_JNI_ALLOCOBJECT_ENTRY(env, clazz);
1212
1213 jobject ret = NULL;
1214 DT_RETURN_MARK(AllocObject, jobject, (const jobject&)ret);
1215
1216 instanceOop i = alloc_object(clazz, CHECK_NULL);
1217 ret = JNIHandles::make_local(env, i);
1218 return ret;
1219 JNI_END
1220
1221 DT_RETURN_MARK_DECL(NewObjectA, jobject
1222 , HOTSPOT_JNI_NEWOBJECTA_RETURN(_ret_ref));
1223
1224 JNI_ENTRY(jobject, jni_NewObjectA(JNIEnv *env, jclass clazz, jmethodID methodID, const jvalue *args))
1225 JNIWrapper("NewObjectA");
1226
1227 HOTSPOT_JNI_NEWOBJECTA_ENTRY(env, clazz, (uintptr_t) methodID);
1228
1229 jobject obj = NULL;
1230 DT_RETURN_MARK(NewObjectA, jobject, (const jobject)obj);
1231
1232 instanceOop i = alloc_object(clazz, CHECK_NULL);
1233 obj = JNIHandles::make_local(env, i);
1234 JavaValue jvalue(T_VOID);
1235 JNI_ArgumentPusherArray ap(methodID, args);
1236 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_NULL);
1237 return obj;
1238 JNI_END
1239
1240
1241 DT_RETURN_MARK_DECL(NewObjectV, jobject
1242 , HOTSPOT_JNI_NEWOBJECTV_RETURN(_ret_ref));
1243
1244 JNI_ENTRY(jobject, jni_NewObjectV(JNIEnv *env, jclass clazz, jmethodID methodID, va_list args))
1245 JNIWrapper("NewObjectV");
1246
1247 HOTSPOT_JNI_NEWOBJECTV_ENTRY(env, clazz, (uintptr_t) methodID);
1248
1249 jobject obj = NULL;
1250 DT_RETURN_MARK(NewObjectV, jobject, (const jobject&)obj);
1251
1252 instanceOop i = alloc_object(clazz, CHECK_NULL);
1253 obj = JNIHandles::make_local(env, i);
1254 JavaValue jvalue(T_VOID);
1255 JNI_ArgumentPusherVaArg ap(methodID, args);
1256 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_NULL);
1257 return obj;
1258 JNI_END
1259
1260
1261 DT_RETURN_MARK_DECL(NewObject, jobject
1262 , HOTSPOT_JNI_NEWOBJECT_RETURN(_ret_ref));
1263
1264 JNI_ENTRY(jobject, jni_NewObject(JNIEnv *env, jclass clazz, jmethodID methodID, ...))
1265 JNIWrapper("NewObject");
1266
1267 HOTSPOT_JNI_NEWOBJECT_ENTRY(env, clazz, (uintptr_t) methodID);
1268
1269 jobject obj = NULL;
1270 DT_RETURN_MARK(NewObject, jobject, (const jobject&)obj);
1271
1272 instanceOop i = alloc_object(clazz, CHECK_NULL);
1273 obj = JNIHandles::make_local(env, i);
1274 va_list args;
1275 va_start(args, methodID);
1276 JavaValue jvalue(T_VOID);
1277 JNI_ArgumentPusherVaArg ap(methodID, args);
1278 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_NULL);
1279 va_end(args);
1280 return obj;
1281 JNI_END
1282
1283
1284 JNI_ENTRY(jclass, jni_GetObjectClass(JNIEnv *env, jobject obj))
1285 JNIWrapper("GetObjectClass");
1286
1287 HOTSPOT_JNI_GETOBJECTCLASS_ENTRY(env, obj);
1288
1289 Klass* k = JNIHandles::resolve_non_null(obj)->klass();
1290 jclass ret =
1291 (jclass) JNIHandles::make_local(env, k->java_mirror());
1292
1293 HOTSPOT_JNI_GETOBJECTCLASS_RETURN(ret);
1294 return ret;
1295 JNI_END
1296
1297 JNI_QUICK_ENTRY(jboolean, jni_IsInstanceOf(JNIEnv *env, jobject obj, jclass clazz))
1298 JNIWrapper("IsInstanceOf");
1299
1300 HOTSPOT_JNI_ISINSTANCEOF_ENTRY(env, obj, clazz);
1301
1302 jboolean ret = JNI_TRUE;
1303 if (obj != NULL) {
1304 ret = JNI_FALSE;
1305 Klass* k = java_lang_Class::as_Klass(
1306 JNIHandles::resolve_non_null(clazz));
1307 if (k != NULL) {
1308 ret = JNIHandles::resolve_non_null(obj)->is_a(k) ? JNI_TRUE : JNI_FALSE;
1309 }
1310 }
1311
1312 HOTSPOT_JNI_ISINSTANCEOF_RETURN(ret);
1313 return ret;
1314 JNI_END
1315
1316
1317 static jmethodID get_method_id(JNIEnv *env, jclass clazz, const char *name_str,
1318 const char *sig, bool is_static, TRAPS) {
1319 // %%%% This code should probably just call into a method in the LinkResolver
1320 //
1321 // The class should have been loaded (we have an instance of the class
1322 // passed in) so the method and signature should already be in the symbol
1323 // table. If they're not there, the method doesn't exist.
1324 const char *name_to_probe = (name_str == NULL)
1325 ? vmSymbols::object_initializer_name()->as_C_string()
1326 : name_str;
1327 TempNewSymbol name = SymbolTable::probe(name_to_probe, (int)strlen(name_to_probe));
1328 TempNewSymbol signature = SymbolTable::probe(sig, (int)strlen(sig));
1329
1330 if (name == NULL || signature == NULL) {
1331 THROW_MSG_0(vmSymbols::java_lang_NoSuchMethodError(), name_str);
1332 }
1333
1334 // Throw a NoSuchMethodError exception if we have an instance of a
1335 // primitive java.lang.Class
1336 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(clazz))) {
1337 THROW_MSG_0(vmSymbols::java_lang_NoSuchMethodError(), name_str);
1338 }
1339
1340 KlassHandle klass(THREAD,
1341 java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz)));
1342
1343 // Make sure class is linked and initialized before handing id's out to
1344 // Method*s.
1345 klass()->initialize(CHECK_NULL);
1346
1347 Method* m;
1348 if (name == vmSymbols::object_initializer_name() ||
1349 name == vmSymbols::class_initializer_name()) {
1350 // Never search superclasses for constructors
1351 if (klass->is_instance_klass()) {
1352 m = InstanceKlass::cast(klass())->find_method(name, signature);
1353 } else {
1354 m = NULL;
1355 }
1356 } else {
1357 m = klass->lookup_method(name, signature);
1358 if (m == NULL && klass->is_instance_klass()) {
1359 m = InstanceKlass::cast(klass())->lookup_method_in_ordered_interfaces(name, signature);
1360 }
1361 }
1362 if (m == NULL || (m->is_static() != is_static)) {
1363 THROW_MSG_0(vmSymbols::java_lang_NoSuchMethodError(), name_str);
1364 }
1365 return m->jmethod_id();
1366 }
1367
1368
1369 JNI_ENTRY(jmethodID, jni_GetMethodID(JNIEnv *env, jclass clazz,
1370 const char *name, const char *sig))
1371 JNIWrapper("GetMethodID");
1372 HOTSPOT_JNI_GETMETHODID_ENTRY(env, clazz, (char *) name, (char *) sig);
1373 jmethodID ret = get_method_id(env, clazz, name, sig, false, thread);
1374 HOTSPOT_JNI_GETMETHODID_RETURN((uintptr_t) ret);
1375 return ret;
1376 JNI_END
1377
1378
1379 JNI_ENTRY(jmethodID, jni_GetStaticMethodID(JNIEnv *env, jclass clazz,
1380 const char *name, const char *sig))
1381 JNIWrapper("GetStaticMethodID");
1382 HOTSPOT_JNI_GETSTATICMETHODID_ENTRY(env, (char *) clazz, (char *) name, (char *)sig);
1383 jmethodID ret = get_method_id(env, clazz, name, sig, true, thread);
1384 HOTSPOT_JNI_GETSTATICMETHODID_RETURN((uintptr_t) ret);
1385 return ret;
1386 JNI_END
1387
1388
1389
1390 //
1391 // Calling Methods
1392 //
1393
1394
1395 #define DEFINE_CALLMETHOD(ResultType, Result, Tag \
1396 , EntryProbe, ReturnProbe) \
1397 \
1398 DT_RETURN_MARK_DECL_FOR(Result, Call##Result##Method, ResultType \
1399 , ReturnProbe); \
1400 \
1401 JNI_ENTRY(ResultType, \
1402 jni_Call##Result##Method(JNIEnv *env, jobject obj, jmethodID methodID, ...)) \
1403 JNIWrapper("Call" XSTR(Result) "Method"); \
1404 \
1405 EntryProbe; \
1406 ResultType ret = 0;\
1407 DT_RETURN_MARK_FOR(Result, Call##Result##Method, ResultType, \
1408 (const ResultType&)ret);\
1409 \
1410 va_list args; \
1411 va_start(args, methodID); \
1412 JavaValue jvalue(Tag); \
1413 JNI_ArgumentPusherVaArg ap(methodID, args); \
1414 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK_0); \
1415 va_end(args); \
1416 ret = jvalue.get_##ResultType(); \
1417 return ret;\
1418 JNI_END
1419
1420 // the runtime type of subword integral basic types is integer
1421 DEFINE_CALLMETHOD(jboolean, Boolean, T_BOOLEAN
1422 , HOTSPOT_JNI_CALLBOOLEANMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1423 HOTSPOT_JNI_CALLBOOLEANMETHOD_RETURN(_ret_ref))
1424 DEFINE_CALLMETHOD(jbyte, Byte, T_BYTE
1425 , HOTSPOT_JNI_CALLBYTEMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1426 HOTSPOT_JNI_CALLBYTEMETHOD_RETURN(_ret_ref))
1427 DEFINE_CALLMETHOD(jchar, Char, T_CHAR
1428 , HOTSPOT_JNI_CALLCHARMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1429 HOTSPOT_JNI_CALLCHARMETHOD_RETURN(_ret_ref))
1430 DEFINE_CALLMETHOD(jshort, Short, T_SHORT
1431 , HOTSPOT_JNI_CALLSHORTMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1432 HOTSPOT_JNI_CALLSHORTMETHOD_RETURN(_ret_ref))
1433
1434 DEFINE_CALLMETHOD(jobject, Object, T_OBJECT
1435 , HOTSPOT_JNI_CALLOBJECTMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1436 HOTSPOT_JNI_CALLOBJECTMETHOD_RETURN(_ret_ref))
1437 DEFINE_CALLMETHOD(jint, Int, T_INT,
1438 HOTSPOT_JNI_CALLINTMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1439 HOTSPOT_JNI_CALLINTMETHOD_RETURN(_ret_ref))
1440 DEFINE_CALLMETHOD(jlong, Long, T_LONG
1441 , HOTSPOT_JNI_CALLLONGMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1442 HOTSPOT_JNI_CALLLONGMETHOD_RETURN(_ret_ref))
1443 // Float and double probes don't return value because dtrace doesn't currently support it
1444 DEFINE_CALLMETHOD(jfloat, Float, T_FLOAT
1445 , HOTSPOT_JNI_CALLFLOATMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1446 HOTSPOT_JNI_CALLFLOATMETHOD_RETURN())
1447 DEFINE_CALLMETHOD(jdouble, Double, T_DOUBLE
1448 , HOTSPOT_JNI_CALLDOUBLEMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1449 HOTSPOT_JNI_CALLDOUBLEMETHOD_RETURN())
1450
1451 #define DEFINE_CALLMETHODV(ResultType, Result, Tag \
1452 , EntryProbe, ReturnProbe) \
1453 \
1454 DT_RETURN_MARK_DECL_FOR(Result, Call##Result##MethodV, ResultType \
1455 , ReturnProbe); \
1456 \
1457 JNI_ENTRY(ResultType, \
1458 jni_Call##Result##MethodV(JNIEnv *env, jobject obj, jmethodID methodID, va_list args)) \
1459 JNIWrapper("Call" XSTR(Result) "MethodV"); \
1460 \
1461 EntryProbe;\
1462 ResultType ret = 0;\
1463 DT_RETURN_MARK_FOR(Result, Call##Result##MethodV, ResultType, \
1464 (const ResultType&)ret);\
1465 \
1466 JavaValue jvalue(Tag); \
1467 JNI_ArgumentPusherVaArg ap(methodID, args); \
1468 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK_0); \
1469 ret = jvalue.get_##ResultType(); \
1470 return ret;\
1471 JNI_END
1472
1473 // the runtime type of subword integral basic types is integer
1474 DEFINE_CALLMETHODV(jboolean, Boolean, T_BOOLEAN
1475 , HOTSPOT_JNI_CALLBOOLEANMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1476 HOTSPOT_JNI_CALLBOOLEANMETHODV_RETURN(_ret_ref))
1477 DEFINE_CALLMETHODV(jbyte, Byte, T_BYTE
1478 , HOTSPOT_JNI_CALLBYTEMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1479 HOTSPOT_JNI_CALLBYTEMETHODV_RETURN(_ret_ref))
1480 DEFINE_CALLMETHODV(jchar, Char, T_CHAR
1481 , HOTSPOT_JNI_CALLCHARMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1482 HOTSPOT_JNI_CALLCHARMETHODV_RETURN(_ret_ref))
1483 DEFINE_CALLMETHODV(jshort, Short, T_SHORT
1484 , HOTSPOT_JNI_CALLSHORTMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1485 HOTSPOT_JNI_CALLSHORTMETHODV_RETURN(_ret_ref))
1486
1487 DEFINE_CALLMETHODV(jobject, Object, T_OBJECT
1488 , HOTSPOT_JNI_CALLOBJECTMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1489 HOTSPOT_JNI_CALLOBJECTMETHODV_RETURN(_ret_ref))
1490 DEFINE_CALLMETHODV(jint, Int, T_INT,
1491 HOTSPOT_JNI_CALLINTMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1492 HOTSPOT_JNI_CALLINTMETHODV_RETURN(_ret_ref))
1493 DEFINE_CALLMETHODV(jlong, Long, T_LONG
1494 , HOTSPOT_JNI_CALLLONGMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1495 HOTSPOT_JNI_CALLLONGMETHODV_RETURN(_ret_ref))
1496 // Float and double probes don't return value because dtrace doesn't currently support it
1497 DEFINE_CALLMETHODV(jfloat, Float, T_FLOAT
1498 , HOTSPOT_JNI_CALLFLOATMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1499 HOTSPOT_JNI_CALLFLOATMETHODV_RETURN())
1500 DEFINE_CALLMETHODV(jdouble, Double, T_DOUBLE
1501 , HOTSPOT_JNI_CALLDOUBLEMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1502 HOTSPOT_JNI_CALLDOUBLEMETHODV_RETURN())
1503
1504 #define DEFINE_CALLMETHODA(ResultType, Result, Tag \
1505 , EntryProbe, ReturnProbe) \
1506 \
1507 DT_RETURN_MARK_DECL_FOR(Result, Call##Result##MethodA, ResultType \
1508 , ReturnProbe); \
1509 \
1510 JNI_ENTRY(ResultType, \
1511 jni_Call##Result##MethodA(JNIEnv *env, jobject obj, jmethodID methodID, const jvalue *args)) \
1512 JNIWrapper("Call" XSTR(Result) "MethodA"); \
1513 EntryProbe; \
1514 ResultType ret = 0;\
1515 DT_RETURN_MARK_FOR(Result, Call##Result##MethodA, ResultType, \
1516 (const ResultType&)ret);\
1517 \
1518 JavaValue jvalue(Tag); \
1519 JNI_ArgumentPusherArray ap(methodID, args); \
1520 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK_0); \
1521 ret = jvalue.get_##ResultType(); \
1522 return ret;\
1523 JNI_END
1524
1525 // the runtime type of subword integral basic types is integer
1526 DEFINE_CALLMETHODA(jboolean, Boolean, T_BOOLEAN
1527 , HOTSPOT_JNI_CALLBOOLEANMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1528 HOTSPOT_JNI_CALLBOOLEANMETHODA_RETURN(_ret_ref))
1529 DEFINE_CALLMETHODA(jbyte, Byte, T_BYTE
1530 , HOTSPOT_JNI_CALLBYTEMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1531 HOTSPOT_JNI_CALLBYTEMETHODA_RETURN(_ret_ref))
1532 DEFINE_CALLMETHODA(jchar, Char, T_CHAR
1533 , HOTSPOT_JNI_CALLCHARMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1534 HOTSPOT_JNI_CALLCHARMETHODA_RETURN(_ret_ref))
1535 DEFINE_CALLMETHODA(jshort, Short, T_SHORT
1536 , HOTSPOT_JNI_CALLSHORTMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1537 HOTSPOT_JNI_CALLSHORTMETHODA_RETURN(_ret_ref))
1538
1539 DEFINE_CALLMETHODA(jobject, Object, T_OBJECT
1540 , HOTSPOT_JNI_CALLOBJECTMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1541 HOTSPOT_JNI_CALLOBJECTMETHODA_RETURN(_ret_ref))
1542 DEFINE_CALLMETHODA(jint, Int, T_INT,
1543 HOTSPOT_JNI_CALLINTMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1544 HOTSPOT_JNI_CALLINTMETHODA_RETURN(_ret_ref))
1545 DEFINE_CALLMETHODA(jlong, Long, T_LONG
1546 , HOTSPOT_JNI_CALLLONGMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1547 HOTSPOT_JNI_CALLLONGMETHODA_RETURN(_ret_ref))
1548 // Float and double probes don't return value because dtrace doesn't currently support it
1549 DEFINE_CALLMETHODA(jfloat, Float, T_FLOAT
1550 , HOTSPOT_JNI_CALLFLOATMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1551 HOTSPOT_JNI_CALLFLOATMETHODA_RETURN())
1552 DEFINE_CALLMETHODA(jdouble, Double, T_DOUBLE
1553 , HOTSPOT_JNI_CALLDOUBLEMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1554 HOTSPOT_JNI_CALLDOUBLEMETHODA_RETURN())
1555
1556 DT_VOID_RETURN_MARK_DECL(CallVoidMethod, HOTSPOT_JNI_CALLVOIDMETHOD_RETURN());
1557 DT_VOID_RETURN_MARK_DECL(CallVoidMethodV, HOTSPOT_JNI_CALLVOIDMETHODV_RETURN());
1558 DT_VOID_RETURN_MARK_DECL(CallVoidMethodA, HOTSPOT_JNI_CALLVOIDMETHODA_RETURN());
1559
1560
1561 JNI_ENTRY(void, jni_CallVoidMethod(JNIEnv *env, jobject obj, jmethodID methodID, ...))
1562 JNIWrapper("CallVoidMethod");
1563 HOTSPOT_JNI_CALLVOIDMETHOD_ENTRY(env, obj, (uintptr_t) methodID);
1564 DT_VOID_RETURN_MARK(CallVoidMethod);
1565
1566 va_list args;
1567 va_start(args, methodID);
1568 JavaValue jvalue(T_VOID);
1569 JNI_ArgumentPusherVaArg ap(methodID, args);
1570 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK);
1571 va_end(args);
1572 JNI_END
1573
1574
1575 JNI_ENTRY(void, jni_CallVoidMethodV(JNIEnv *env, jobject obj, jmethodID methodID, va_list args))
1576 JNIWrapper("CallVoidMethodV");
1577 HOTSPOT_JNI_CALLVOIDMETHODV_ENTRY(env, obj, (uintptr_t) methodID);
1578 DT_VOID_RETURN_MARK(CallVoidMethodV);
1579
1580 JavaValue jvalue(T_VOID);
1581 JNI_ArgumentPusherVaArg ap(methodID, args);
1582 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK);
1583 JNI_END
1584
1585
1586 JNI_ENTRY(void, jni_CallVoidMethodA(JNIEnv *env, jobject obj, jmethodID methodID, const jvalue *args))
1587 JNIWrapper("CallVoidMethodA");
1588 HOTSPOT_JNI_CALLVOIDMETHODA_ENTRY(env, obj, (uintptr_t) methodID);
1589 DT_VOID_RETURN_MARK(CallVoidMethodA);
1590
1591 JavaValue jvalue(T_VOID);
1592 JNI_ArgumentPusherArray ap(methodID, args);
1593 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK);
1594 JNI_END
1595
1596
1597
1598 #define DEFINE_CALLNONVIRTUALMETHOD(ResultType, Result, Tag \
1599 , EntryProbe, ReturnProbe) \
1600 \
1601 DT_RETURN_MARK_DECL_FOR(Result, CallNonvirtual##Result##Method, ResultType \
1602 , ReturnProbe);\
1603 \
1604 JNI_ENTRY(ResultType, \
1605 jni_CallNonvirtual##Result##Method(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, ...)) \
1606 JNIWrapper("CallNonvitual" XSTR(Result) "Method"); \
1607 \
1608 EntryProbe;\
1609 ResultType ret;\
1610 DT_RETURN_MARK_FOR(Result, CallNonvirtual##Result##Method, ResultType, \
1611 (const ResultType&)ret);\
1612 \
1613 va_list args; \
1614 va_start(args, methodID); \
1615 JavaValue jvalue(Tag); \
1616 JNI_ArgumentPusherVaArg ap(methodID, args); \
1617 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_0); \
1618 va_end(args); \
1619 ret = jvalue.get_##ResultType(); \
1620 return ret;\
1621 JNI_END
1622
1623 // the runtime type of subword integral basic types is integer
1624 DEFINE_CALLNONVIRTUALMETHOD(jboolean, Boolean, T_BOOLEAN
1625 , HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1626 HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHOD_RETURN(_ret_ref))
1627 DEFINE_CALLNONVIRTUALMETHOD(jbyte, Byte, T_BYTE
1628 , HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1629 HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHOD_RETURN(_ret_ref))
1630 DEFINE_CALLNONVIRTUALMETHOD(jchar, Char, T_CHAR
1631 , HOTSPOT_JNI_CALLNONVIRTUALCHARMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1632 HOTSPOT_JNI_CALLNONVIRTUALCHARMETHOD_RETURN(_ret_ref))
1633 DEFINE_CALLNONVIRTUALMETHOD(jshort, Short, T_SHORT
1634 , HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1635 HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHOD_RETURN(_ret_ref))
1636
1637 DEFINE_CALLNONVIRTUALMETHOD(jobject, Object, T_OBJECT
1638 , HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1639 HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHOD_RETURN(_ret_ref))
1640 DEFINE_CALLNONVIRTUALMETHOD(jint, Int, T_INT
1641 , HOTSPOT_JNI_CALLNONVIRTUALINTMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1642 HOTSPOT_JNI_CALLNONVIRTUALINTMETHOD_RETURN(_ret_ref))
1643 DEFINE_CALLNONVIRTUALMETHOD(jlong, Long, T_LONG
1644 , HOTSPOT_JNI_CALLNONVIRTUALLONGMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1645 // Float and double probes don't return value because dtrace doesn't currently support it
1646 HOTSPOT_JNI_CALLNONVIRTUALLONGMETHOD_RETURN(_ret_ref))
1647 DEFINE_CALLNONVIRTUALMETHOD(jfloat, Float, T_FLOAT
1648 , HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1649 HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHOD_RETURN())
1650 DEFINE_CALLNONVIRTUALMETHOD(jdouble, Double, T_DOUBLE
1651 , HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1652 HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHOD_RETURN())
1653
1654 #define DEFINE_CALLNONVIRTUALMETHODV(ResultType, Result, Tag \
1655 , EntryProbe, ReturnProbe) \
1656 \
1657 DT_RETURN_MARK_DECL_FOR(Result, CallNonvirtual##Result##MethodV, ResultType \
1658 , ReturnProbe);\
1659 \
1660 JNI_ENTRY(ResultType, \
1661 jni_CallNonvirtual##Result##MethodV(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, va_list args)) \
1662 JNIWrapper("CallNonvitual" XSTR(Result) "MethodV"); \
1663 \
1664 EntryProbe;\
1665 ResultType ret;\
1666 DT_RETURN_MARK_FOR(Result, CallNonvirtual##Result##MethodV, ResultType, \
1667 (const ResultType&)ret);\
1668 \
1669 JavaValue jvalue(Tag); \
1670 JNI_ArgumentPusherVaArg ap(methodID, args); \
1671 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_0); \
1672 ret = jvalue.get_##ResultType(); \
1673 return ret;\
1674 JNI_END
1675
1676 // the runtime type of subword integral basic types is integer
1677 DEFINE_CALLNONVIRTUALMETHODV(jboolean, Boolean, T_BOOLEAN
1678 , HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1679 HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHODV_RETURN(_ret_ref))
1680 DEFINE_CALLNONVIRTUALMETHODV(jbyte, Byte, T_BYTE
1681 , HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1682 HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHODV_RETURN(_ret_ref))
1683 DEFINE_CALLNONVIRTUALMETHODV(jchar, Char, T_CHAR
1684 , HOTSPOT_JNI_CALLNONVIRTUALCHARMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1685 HOTSPOT_JNI_CALLNONVIRTUALCHARMETHODV_RETURN(_ret_ref))
1686 DEFINE_CALLNONVIRTUALMETHODV(jshort, Short, T_SHORT
1687 , HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1688 HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHODV_RETURN(_ret_ref))
1689
1690 DEFINE_CALLNONVIRTUALMETHODV(jobject, Object, T_OBJECT
1691 , HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1692 HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHODV_RETURN(_ret_ref))
1693 DEFINE_CALLNONVIRTUALMETHODV(jint, Int, T_INT
1694 , HOTSPOT_JNI_CALLNONVIRTUALINTMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1695 HOTSPOT_JNI_CALLNONVIRTUALINTMETHODV_RETURN(_ret_ref))
1696 DEFINE_CALLNONVIRTUALMETHODV(jlong, Long, T_LONG
1697 , HOTSPOT_JNI_CALLNONVIRTUALLONGMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1698 // Float and double probes don't return value because dtrace doesn't currently support it
1699 HOTSPOT_JNI_CALLNONVIRTUALLONGMETHODV_RETURN(_ret_ref))
1700 DEFINE_CALLNONVIRTUALMETHODV(jfloat, Float, T_FLOAT
1701 , HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1702 HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHODV_RETURN())
1703 DEFINE_CALLNONVIRTUALMETHODV(jdouble, Double, T_DOUBLE
1704 , HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1705 HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHODV_RETURN())
1706
1707 #define DEFINE_CALLNONVIRTUALMETHODA(ResultType, Result, Tag \
1708 , EntryProbe, ReturnProbe) \
1709 \
1710 DT_RETURN_MARK_DECL_FOR(Result, CallNonvirtual##Result##MethodA, ResultType \
1711 , ReturnProbe);\
1712 \
1713 JNI_ENTRY(ResultType, \
1714 jni_CallNonvirtual##Result##MethodA(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, const jvalue *args)) \
1715 JNIWrapper("CallNonvitual" XSTR(Result) "MethodA"); \
1716 \
1717 EntryProbe;\
1718 ResultType ret;\
1719 DT_RETURN_MARK_FOR(Result, CallNonvirtual##Result##MethodA, ResultType, \
1720 (const ResultType&)ret);\
1721 \
1722 JavaValue jvalue(Tag); \
1723 JNI_ArgumentPusherArray ap(methodID, args); \
1724 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_0); \
1725 ret = jvalue.get_##ResultType(); \
1726 return ret;\
1727 JNI_END
1728
1729 // the runtime type of subword integral basic types is integer
1730 DEFINE_CALLNONVIRTUALMETHODA(jboolean, Boolean, T_BOOLEAN
1731 , HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1732 HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHODA_RETURN(_ret_ref))
1733 DEFINE_CALLNONVIRTUALMETHODA(jbyte, Byte, T_BYTE
1734 , HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1735 HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHODA_RETURN(_ret_ref))
1736 DEFINE_CALLNONVIRTUALMETHODA(jchar, Char, T_CHAR
1737 , HOTSPOT_JNI_CALLNONVIRTUALCHARMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1738 HOTSPOT_JNI_CALLNONVIRTUALCHARMETHODA_RETURN(_ret_ref))
1739 DEFINE_CALLNONVIRTUALMETHODA(jshort, Short, T_SHORT
1740 , HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1741 HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHODA_RETURN(_ret_ref))
1742
1743 DEFINE_CALLNONVIRTUALMETHODA(jobject, Object, T_OBJECT
1744 , HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1745 HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHODA_RETURN(_ret_ref))
1746 DEFINE_CALLNONVIRTUALMETHODA(jint, Int, T_INT
1747 , HOTSPOT_JNI_CALLNONVIRTUALINTMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1748 HOTSPOT_JNI_CALLNONVIRTUALINTMETHODA_RETURN(_ret_ref))
1749 DEFINE_CALLNONVIRTUALMETHODA(jlong, Long, T_LONG
1750 , HOTSPOT_JNI_CALLNONVIRTUALLONGMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1751 // Float and double probes don't return value because dtrace doesn't currently support it
1752 HOTSPOT_JNI_CALLNONVIRTUALLONGMETHODA_RETURN(_ret_ref))
1753 DEFINE_CALLNONVIRTUALMETHODA(jfloat, Float, T_FLOAT
1754 , HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1755 HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHODA_RETURN())
1756 DEFINE_CALLNONVIRTUALMETHODA(jdouble, Double, T_DOUBLE
1757 , HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1758 HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHODA_RETURN())
1759
1760 DT_VOID_RETURN_MARK_DECL(CallNonvirtualVoidMethod
1761 , HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHOD_RETURN());
1762 DT_VOID_RETURN_MARK_DECL(CallNonvirtualVoidMethodV
1763 , HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHODV_RETURN());
1764 DT_VOID_RETURN_MARK_DECL(CallNonvirtualVoidMethodA
1765 , HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHODA_RETURN());
1766
1767 JNI_ENTRY(void, jni_CallNonvirtualVoidMethod(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, ...))
1768 JNIWrapper("CallNonvirtualVoidMethod");
1769
1770 HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHOD_ENTRY(env, obj, cls, (uintptr_t) methodID);
1771 DT_VOID_RETURN_MARK(CallNonvirtualVoidMethod);
1772
1773 va_list args;
1774 va_start(args, methodID);
1775 JavaValue jvalue(T_VOID);
1776 JNI_ArgumentPusherVaArg ap(methodID, args);
1777 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK);
1778 va_end(args);
1779 JNI_END
1780
1781
1782 JNI_ENTRY(void, jni_CallNonvirtualVoidMethodV(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, va_list args))
1783 JNIWrapper("CallNonvirtualVoidMethodV");
1784
1785 HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHODV_ENTRY(
1786 env, obj, cls, (uintptr_t) methodID);
1787 DT_VOID_RETURN_MARK(CallNonvirtualVoidMethodV);
1788
1789 JavaValue jvalue(T_VOID);
1790 JNI_ArgumentPusherVaArg ap(methodID, args);
1791 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK);
1792 JNI_END
1793
1794
1795 JNI_ENTRY(void, jni_CallNonvirtualVoidMethodA(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, const jvalue *args))
1796 JNIWrapper("CallNonvirtualVoidMethodA");
1797 HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHODA_ENTRY(
1798 env, obj, cls, (uintptr_t) methodID);
1799 DT_VOID_RETURN_MARK(CallNonvirtualVoidMethodA);
1800 JavaValue jvalue(T_VOID);
1801 JNI_ArgumentPusherArray ap(methodID, args);
1802 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK);
1803 JNI_END
1804
1805
1806
1807 #define DEFINE_CALLSTATICMETHOD(ResultType, Result, Tag \
1808 , EntryProbe, ResultProbe) \
1809 \
1810 DT_RETURN_MARK_DECL_FOR(Result, CallStatic##Result##Method, ResultType \
1811 , ResultProbe); \
1812 \
1813 JNI_ENTRY(ResultType, \
1814 jni_CallStatic##Result##Method(JNIEnv *env, jclass cls, jmethodID methodID, ...)) \
1815 JNIWrapper("CallStatic" XSTR(Result) "Method"); \
1816 \
1817 EntryProbe; \
1818 ResultType ret = 0;\
1819 DT_RETURN_MARK_FOR(Result, CallStatic##Result##Method, ResultType, \
1820 (const ResultType&)ret);\
1821 \
1822 va_list args; \
1823 va_start(args, methodID); \
1824 JavaValue jvalue(Tag); \
1825 JNI_ArgumentPusherVaArg ap(methodID, args); \
1826 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK_0); \
1827 va_end(args); \
1828 ret = jvalue.get_##ResultType(); \
1829 return ret;\
1830 JNI_END
1831
1832 // the runtime type of subword integral basic types is integer
1833 DEFINE_CALLSTATICMETHOD(jboolean, Boolean, T_BOOLEAN
1834 , HOTSPOT_JNI_CALLSTATICBOOLEANMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1835 HOTSPOT_JNI_CALLSTATICBOOLEANMETHOD_RETURN(_ret_ref));
1836 DEFINE_CALLSTATICMETHOD(jbyte, Byte, T_BYTE
1837 , HOTSPOT_JNI_CALLSTATICBYTEMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1838 HOTSPOT_JNI_CALLSTATICBYTEMETHOD_RETURN(_ret_ref));
1839 DEFINE_CALLSTATICMETHOD(jchar, Char, T_CHAR
1840 , HOTSPOT_JNI_CALLSTATICCHARMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1841 HOTSPOT_JNI_CALLSTATICCHARMETHOD_RETURN(_ret_ref));
1842 DEFINE_CALLSTATICMETHOD(jshort, Short, T_SHORT
1843 , HOTSPOT_JNI_CALLSTATICSHORTMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1844 HOTSPOT_JNI_CALLSTATICSHORTMETHOD_RETURN(_ret_ref));
1845
1846 DEFINE_CALLSTATICMETHOD(jobject, Object, T_OBJECT
1847 , HOTSPOT_JNI_CALLSTATICOBJECTMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1848 HOTSPOT_JNI_CALLSTATICOBJECTMETHOD_RETURN(_ret_ref));
1849 DEFINE_CALLSTATICMETHOD(jint, Int, T_INT
1850 , HOTSPOT_JNI_CALLSTATICINTMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1851 HOTSPOT_JNI_CALLSTATICINTMETHOD_RETURN(_ret_ref));
1852 DEFINE_CALLSTATICMETHOD(jlong, Long, T_LONG
1853 , HOTSPOT_JNI_CALLSTATICLONGMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1854 HOTSPOT_JNI_CALLSTATICLONGMETHOD_RETURN(_ret_ref));
1855 // Float and double probes don't return value because dtrace doesn't currently support it
1856 DEFINE_CALLSTATICMETHOD(jfloat, Float, T_FLOAT
1857 , HOTSPOT_JNI_CALLSTATICFLOATMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1858 HOTSPOT_JNI_CALLSTATICFLOATMETHOD_RETURN());
1859 DEFINE_CALLSTATICMETHOD(jdouble, Double, T_DOUBLE
1860 , HOTSPOT_JNI_CALLSTATICDOUBLEMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1861 HOTSPOT_JNI_CALLSTATICDOUBLEMETHOD_RETURN());
1862
1863 #define DEFINE_CALLSTATICMETHODV(ResultType, Result, Tag \
1864 , EntryProbe, ResultProbe) \
1865 \
1866 DT_RETURN_MARK_DECL_FOR(Result, CallStatic##Result##MethodV, ResultType \
1867 , ResultProbe); \
1868 \
1869 JNI_ENTRY(ResultType, \
1870 jni_CallStatic##Result##MethodV(JNIEnv *env, jclass cls, jmethodID methodID, va_list args)) \
1871 JNIWrapper("CallStatic" XSTR(Result) "MethodV"); \
1872 \
1873 EntryProbe; \
1874 ResultType ret = 0;\
1875 DT_RETURN_MARK_FOR(Result, CallStatic##Result##MethodV, ResultType, \
1876 (const ResultType&)ret);\
1877 \
1878 JavaValue jvalue(Tag); \
1879 JNI_ArgumentPusherVaArg ap(methodID, args); \
1880 /* Make sure class is initialized before trying to invoke its method */ \
1881 KlassHandle k(THREAD, java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls))); \
1882 k()->initialize(CHECK_0); \
1883 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK_0); \
1884 va_end(args); \
1885 ret = jvalue.get_##ResultType(); \
1886 return ret;\
1887 JNI_END
1888
1889 // the runtime type of subword integral basic types is integer
1890 DEFINE_CALLSTATICMETHODV(jboolean, Boolean, T_BOOLEAN
1891 , HOTSPOT_JNI_CALLSTATICBOOLEANMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1892 HOTSPOT_JNI_CALLSTATICBOOLEANMETHODV_RETURN(_ret_ref));
1893 DEFINE_CALLSTATICMETHODV(jbyte, Byte, T_BYTE
1894 , HOTSPOT_JNI_CALLSTATICBYTEMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1895 HOTSPOT_JNI_CALLSTATICBYTEMETHODV_RETURN(_ret_ref));
1896 DEFINE_CALLSTATICMETHODV(jchar, Char, T_CHAR
1897 , HOTSPOT_JNI_CALLSTATICCHARMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1898 HOTSPOT_JNI_CALLSTATICCHARMETHODV_RETURN(_ret_ref));
1899 DEFINE_CALLSTATICMETHODV(jshort, Short, T_SHORT
1900 , HOTSPOT_JNI_CALLSTATICSHORTMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1901 HOTSPOT_JNI_CALLSTATICSHORTMETHODV_RETURN(_ret_ref));
1902
1903 DEFINE_CALLSTATICMETHODV(jobject, Object, T_OBJECT
1904 , HOTSPOT_JNI_CALLSTATICOBJECTMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1905 HOTSPOT_JNI_CALLSTATICOBJECTMETHODV_RETURN(_ret_ref));
1906 DEFINE_CALLSTATICMETHODV(jint, Int, T_INT
1907 , HOTSPOT_JNI_CALLSTATICINTMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1908 HOTSPOT_JNI_CALLSTATICINTMETHODV_RETURN(_ret_ref));
1909 DEFINE_CALLSTATICMETHODV(jlong, Long, T_LONG
1910 , HOTSPOT_JNI_CALLSTATICLONGMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1911 HOTSPOT_JNI_CALLSTATICLONGMETHODV_RETURN(_ret_ref));
1912 // Float and double probes don't return value because dtrace doesn't currently support it
1913 DEFINE_CALLSTATICMETHODV(jfloat, Float, T_FLOAT
1914 , HOTSPOT_JNI_CALLSTATICFLOATMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1915 HOTSPOT_JNI_CALLSTATICFLOATMETHODV_RETURN());
1916 DEFINE_CALLSTATICMETHODV(jdouble, Double, T_DOUBLE
1917 , HOTSPOT_JNI_CALLSTATICDOUBLEMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1918 HOTSPOT_JNI_CALLSTATICDOUBLEMETHODV_RETURN());
1919
1920 #define DEFINE_CALLSTATICMETHODA(ResultType, Result, Tag \
1921 , EntryProbe, ResultProbe) \
1922 \
1923 DT_RETURN_MARK_DECL_FOR(Result, CallStatic##Result##MethodA, ResultType \
1924 , ResultProbe); \
1925 \
1926 JNI_ENTRY(ResultType, \
1927 jni_CallStatic##Result##MethodA(JNIEnv *env, jclass cls, jmethodID methodID, const jvalue *args)) \
1928 JNIWrapper("CallStatic" XSTR(Result) "MethodA"); \
1929 \
1930 EntryProbe; \
1931 ResultType ret = 0;\
1932 DT_RETURN_MARK_FOR(Result, CallStatic##Result##MethodA, ResultType, \
1933 (const ResultType&)ret);\
1934 \
1935 JavaValue jvalue(Tag); \
1936 JNI_ArgumentPusherArray ap(methodID, args); \
1937 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK_0); \
1938 ret = jvalue.get_##ResultType(); \
1939 return ret;\
1940 JNI_END
1941
1942 // the runtime type of subword integral basic types is integer
1943 DEFINE_CALLSTATICMETHODA(jboolean, Boolean, T_BOOLEAN
1944 , HOTSPOT_JNI_CALLSTATICBOOLEANMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1945 HOTSPOT_JNI_CALLSTATICBOOLEANMETHODA_RETURN(_ret_ref));
1946 DEFINE_CALLSTATICMETHODA(jbyte, Byte, T_BYTE
1947 , HOTSPOT_JNI_CALLSTATICBYTEMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1948 HOTSPOT_JNI_CALLSTATICBYTEMETHODA_RETURN(_ret_ref));
1949 DEFINE_CALLSTATICMETHODA(jchar, Char, T_CHAR
1950 , HOTSPOT_JNI_CALLSTATICCHARMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1951 HOTSPOT_JNI_CALLSTATICCHARMETHODA_RETURN(_ret_ref));
1952 DEFINE_CALLSTATICMETHODA(jshort, Short, T_SHORT
1953 , HOTSPOT_JNI_CALLSTATICSHORTMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1954 HOTSPOT_JNI_CALLSTATICSHORTMETHODA_RETURN(_ret_ref));
1955
1956 DEFINE_CALLSTATICMETHODA(jobject, Object, T_OBJECT
1957 , HOTSPOT_JNI_CALLSTATICOBJECTMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1958 HOTSPOT_JNI_CALLSTATICOBJECTMETHODA_RETURN(_ret_ref));
1959 DEFINE_CALLSTATICMETHODA(jint, Int, T_INT
1960 , HOTSPOT_JNI_CALLSTATICINTMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1961 HOTSPOT_JNI_CALLSTATICINTMETHODA_RETURN(_ret_ref));
1962 DEFINE_CALLSTATICMETHODA(jlong, Long, T_LONG
1963 , HOTSPOT_JNI_CALLSTATICLONGMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1964 HOTSPOT_JNI_CALLSTATICLONGMETHODA_RETURN(_ret_ref));
1965 // Float and double probes don't return value because dtrace doesn't currently support it
1966 DEFINE_CALLSTATICMETHODA(jfloat, Float, T_FLOAT
1967 , HOTSPOT_JNI_CALLSTATICFLOATMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1968 HOTSPOT_JNI_CALLSTATICFLOATMETHODA_RETURN());
1969 DEFINE_CALLSTATICMETHODA(jdouble, Double, T_DOUBLE
1970 , HOTSPOT_JNI_CALLSTATICDOUBLEMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1971 HOTSPOT_JNI_CALLSTATICDOUBLEMETHODA_RETURN());
1972
1973 DT_VOID_RETURN_MARK_DECL(CallStaticVoidMethod
1974 , HOTSPOT_JNI_CALLSTATICVOIDMETHOD_RETURN());
1975 DT_VOID_RETURN_MARK_DECL(CallStaticVoidMethodV
1976 , HOTSPOT_JNI_CALLSTATICVOIDMETHODV_RETURN());
1977 DT_VOID_RETURN_MARK_DECL(CallStaticVoidMethodA
1978 , HOTSPOT_JNI_CALLSTATICVOIDMETHODA_RETURN());
1979
1980 JNI_ENTRY(void, jni_CallStaticVoidMethod(JNIEnv *env, jclass cls, jmethodID methodID, ...))
1981 JNIWrapper("CallStaticVoidMethod");
1982 HOTSPOT_JNI_CALLSTATICVOIDMETHOD_ENTRY(env, cls, (uintptr_t) methodID);
1983 DT_VOID_RETURN_MARK(CallStaticVoidMethod);
1984
1985 va_list args;
1986 va_start(args, methodID);
1987 JavaValue jvalue(T_VOID);
1988 JNI_ArgumentPusherVaArg ap(methodID, args);
1989 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK);
1990 va_end(args);
1991 JNI_END
1992
1993
1994 JNI_ENTRY(void, jni_CallStaticVoidMethodV(JNIEnv *env, jclass cls, jmethodID methodID, va_list args))
1995 JNIWrapper("CallStaticVoidMethodV");
1996 HOTSPOT_JNI_CALLSTATICVOIDMETHODV_ENTRY(env, cls, (uintptr_t) methodID);
1997 DT_VOID_RETURN_MARK(CallStaticVoidMethodV);
1998
1999 JavaValue jvalue(T_VOID);
2000 JNI_ArgumentPusherVaArg ap(methodID, args);
2001 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK);
2002 JNI_END
2003
2004
2005 JNI_ENTRY(void, jni_CallStaticVoidMethodA(JNIEnv *env, jclass cls, jmethodID methodID, const jvalue *args))
2006 JNIWrapper("CallStaticVoidMethodA");
2007 HOTSPOT_JNI_CALLSTATICVOIDMETHODA_ENTRY(env, cls, (uintptr_t) methodID);
2008 DT_VOID_RETURN_MARK(CallStaticVoidMethodA);
2009
2010 JavaValue jvalue(T_VOID);
2011 JNI_ArgumentPusherArray ap(methodID, args);
2012 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK);
2013 JNI_END
2014
2015
2016 //
2017 // Accessing Fields
2018 //
2019
2020
2021 DT_RETURN_MARK_DECL(GetFieldID, jfieldID
2022 , HOTSPOT_JNI_GETFIELDID_RETURN((uintptr_t)_ret_ref));
2023
2024 JNI_ENTRY(jfieldID, jni_GetFieldID(JNIEnv *env, jclass clazz,
2025 const char *name, const char *sig))
2026 JNIWrapper("GetFieldID");
2027 HOTSPOT_JNI_GETFIELDID_ENTRY(env, clazz, (char *) name, (char *) sig);
2028 jfieldID ret = 0;
2029 DT_RETURN_MARK(GetFieldID, jfieldID, (const jfieldID&)ret);
2030
2031 // The class should have been loaded (we have an instance of the class
2032 // passed in) so the field and signature should already be in the symbol
2033 // table. If they're not there, the field doesn't exist.
2034 TempNewSymbol fieldname = SymbolTable::probe(name, (int)strlen(name));
2035 TempNewSymbol signame = SymbolTable::probe(sig, (int)strlen(sig));
2036 if (fieldname == NULL || signame == NULL) {
2037 THROW_MSG_0(vmSymbols::java_lang_NoSuchFieldError(), (char*) name);
2038 }
2039 KlassHandle k(THREAD,
2040 java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz)));
2041 // Make sure class is initialized before handing id's out to fields
2042 k()->initialize(CHECK_NULL);
2043
2044 fieldDescriptor fd;
2045 if (!k()->is_instance_klass() ||
2046 !InstanceKlass::cast(k())->find_field(fieldname, signame, false, &fd)) {
2047 THROW_MSG_0(vmSymbols::java_lang_NoSuchFieldError(), (char*) name);
2048 }
2049
2050 // A jfieldID for a non-static field is simply the offset of the field within the instanceOop
2051 // It may also have hash bits for k, if VerifyJNIFields is turned on.
2052 ret = jfieldIDWorkaround::to_instance_jfieldID(k(), fd.offset());
2053 return ret;
2054 JNI_END
2055
2056
2057 JNI_ENTRY(jobject, jni_GetObjectField(JNIEnv *env, jobject obj, jfieldID fieldID))
2058 JNIWrapper("GetObjectField");
2059 HOTSPOT_JNI_GETOBJECTFIELD_ENTRY(env, obj, (uintptr_t) fieldID);
2060 oop o = JNIHandles::resolve_non_null(obj);
2061 Klass* k = o->klass();
2062 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID);
2063 // Keep JVMTI addition small and only check enabled flag here.
2064 // jni_GetField_probe() assumes that is okay to create handles.
2065 if (JvmtiExport::should_post_field_access()) {
2066 o = JvmtiExport::jni_GetField_probe(thread, obj, o, k, fieldID, false);
2067 }
2068 jobject ret = JNIHandles::make_local(env, o->obj_field(offset));
2069 #if INCLUDE_ALL_GCS
2070 // If G1 is enabled and we are accessing the value of the referent
2071 // field in a reference object then we need to register a non-null
2072 // referent with the SATB barrier.
2073 if (UseG1GC) {
2074 bool needs_barrier = false;
2075
2076 if (ret != NULL &&
2077 offset == java_lang_ref_Reference::referent_offset &&
2078 InstanceKlass::cast(k)->reference_type() != REF_NONE) {
2079 assert(InstanceKlass::cast(k)->is_subclass_of(SystemDictionary::Reference_klass()), "sanity");
2080 needs_barrier = true;
2081 }
2082
2083 if (needs_barrier) {
2084 oop referent = JNIHandles::resolve(ret);
2085 G1SATBCardTableModRefBS::enqueue(referent);
2086 }
2087 }
2088 #endif // INCLUDE_ALL_GCS
2089 HOTSPOT_JNI_GETOBJECTFIELD_RETURN(ret);
2090 return ret;
2091 JNI_END
2092
2093
2094
2095 #define DEFINE_GETFIELD(Return,Fieldname,Result \
2096 , EntryProbe, ReturnProbe) \
2097 \
2098 DT_RETURN_MARK_DECL_FOR(Result, Get##Result##Field, Return \
2099 , ReturnProbe); \
2100 \
2101 JNI_QUICK_ENTRY(Return, jni_Get##Result##Field(JNIEnv *env, jobject obj, jfieldID fieldID)) \
2102 JNIWrapper("Get" XSTR(Result) "Field"); \
2103 \
2104 EntryProbe; \
2105 Return ret = 0;\
2106 DT_RETURN_MARK_FOR(Result, Get##Result##Field, Return, (const Return&)ret);\
2107 \
2108 oop o = JNIHandles::resolve_non_null(obj); \
2109 Klass* k = o->klass(); \
2110 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID); \
2111 /* Keep JVMTI addition small and only check enabled flag here. */ \
2112 /* jni_GetField_probe_nh() assumes that is not okay to create handles */ \
2113 /* and creates a ResetNoHandleMark. */ \
2114 if (JvmtiExport::should_post_field_access()) { \
2115 o = JvmtiExport::jni_GetField_probe_nh(thread, obj, o, k, fieldID, false); \
2116 } \
2117 ret = o->Fieldname##_field(offset); \
2118 return ret; \
2119 JNI_END
2120
2121 DEFINE_GETFIELD(jboolean, bool, Boolean
2122 , HOTSPOT_JNI_GETBOOLEANFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2123 HOTSPOT_JNI_GETBOOLEANFIELD_RETURN(_ret_ref))
2124 DEFINE_GETFIELD(jbyte, byte, Byte
2125 , HOTSPOT_JNI_GETBYTEFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2126 HOTSPOT_JNI_GETBYTEFIELD_RETURN(_ret_ref))
2127 DEFINE_GETFIELD(jchar, char, Char
2128 , HOTSPOT_JNI_GETCHARFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2129 HOTSPOT_JNI_GETCHARFIELD_RETURN(_ret_ref))
2130 DEFINE_GETFIELD(jshort, short, Short
2131 , HOTSPOT_JNI_GETSHORTFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2132 HOTSPOT_JNI_GETSHORTFIELD_RETURN(_ret_ref))
2133 DEFINE_GETFIELD(jint, int, Int
2134 , HOTSPOT_JNI_GETINTFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2135 HOTSPOT_JNI_GETINTFIELD_RETURN(_ret_ref))
2136 DEFINE_GETFIELD(jlong, long, Long
2137 , HOTSPOT_JNI_GETLONGFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2138 HOTSPOT_JNI_GETLONGFIELD_RETURN(_ret_ref))
2139 // Float and double probes don't return value because dtrace doesn't currently support it
2140 DEFINE_GETFIELD(jfloat, float, Float
2141 , HOTSPOT_JNI_GETFLOATFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2142 HOTSPOT_JNI_GETFLOATFIELD_RETURN())
2143 DEFINE_GETFIELD(jdouble, double, Double
2144 , HOTSPOT_JNI_GETDOUBLEFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2145 HOTSPOT_JNI_GETDOUBLEFIELD_RETURN())
2146
2147 address jni_GetBooleanField_addr() {
2148 return (address)jni_GetBooleanField;
2149 }
2150 address jni_GetByteField_addr() {
2151 return (address)jni_GetByteField;
2152 }
2153 address jni_GetCharField_addr() {
2154 return (address)jni_GetCharField;
2155 }
2156 address jni_GetShortField_addr() {
2157 return (address)jni_GetShortField;
2158 }
2159 address jni_GetIntField_addr() {
2160 return (address)jni_GetIntField;
2161 }
2162 address jni_GetLongField_addr() {
2163 return (address)jni_GetLongField;
2164 }
2165 address jni_GetFloatField_addr() {
2166 return (address)jni_GetFloatField;
2167 }
2168 address jni_GetDoubleField_addr() {
2169 return (address)jni_GetDoubleField;
2170 }
2171
2172 JNI_QUICK_ENTRY(void, jni_SetObjectField(JNIEnv *env, jobject obj, jfieldID fieldID, jobject value))
2173 JNIWrapper("SetObjectField");
2174 HOTSPOT_JNI_SETOBJECTFIELD_ENTRY(env, obj, (uintptr_t) fieldID, value);
2175 oop o = JNIHandles::resolve_non_null(obj);
2176 Klass* k = o->klass();
2177 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID);
2178 // Keep JVMTI addition small and only check enabled flag here.
2179 // jni_SetField_probe_nh() assumes that is not okay to create handles
2180 // and creates a ResetNoHandleMark.
2181 if (JvmtiExport::should_post_field_modification()) {
2182 jvalue field_value;
2183 field_value.l = value;
2184 o = JvmtiExport::jni_SetField_probe_nh(thread, obj, o, k, fieldID, false, 'L', (jvalue *)&field_value);
2185 }
2186 o->obj_field_put(offset, JNIHandles::resolve(value));
2187 HOTSPOT_JNI_SETOBJECTFIELD_RETURN();
2188 JNI_END
2189
2190
2191 #define DEFINE_SETFIELD(Argument,Fieldname,Result,SigType,unionType \
2192 , EntryProbe, ReturnProbe) \
2193 \
2194 JNI_QUICK_ENTRY(void, jni_Set##Result##Field(JNIEnv *env, jobject obj, jfieldID fieldID, Argument value)) \
2195 JNIWrapper("Set" XSTR(Result) "Field"); \
2196 \
2197 EntryProbe; \
2198 \
2199 oop o = JNIHandles::resolve_non_null(obj); \
2200 Klass* k = o->klass(); \
2201 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID); \
2202 /* Keep JVMTI addition small and only check enabled flag here. */ \
2203 /* jni_SetField_probe_nh() assumes that is not okay to create handles */ \
2204 /* and creates a ResetNoHandleMark. */ \
2205 if (JvmtiExport::should_post_field_modification()) { \
2206 jvalue field_value; \
2207 field_value.unionType = value; \
2208 o = JvmtiExport::jni_SetField_probe_nh(thread, obj, o, k, fieldID, false, SigType, (jvalue *)&field_value); \
2209 } \
2210 if (SigType == 'Z') { value = ((jboolean)value) & 1; } \
2211 o->Fieldname##_field_put(offset, value); \
2212 ReturnProbe; \
2213 JNI_END
2214
2215 DEFINE_SETFIELD(jboolean, bool, Boolean, 'Z', z
2216 , HOTSPOT_JNI_SETBOOLEANFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value),
2217 HOTSPOT_JNI_SETBOOLEANFIELD_RETURN())
2218 DEFINE_SETFIELD(jbyte, byte, Byte, 'B', b
2219 , HOTSPOT_JNI_SETBYTEFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value),
2220 HOTSPOT_JNI_SETBYTEFIELD_RETURN())
2221 DEFINE_SETFIELD(jchar, char, Char, 'C', c
2222 , HOTSPOT_JNI_SETCHARFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value),
2223 HOTSPOT_JNI_SETCHARFIELD_RETURN())
2224 DEFINE_SETFIELD(jshort, short, Short, 'S', s
2225 , HOTSPOT_JNI_SETSHORTFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value),
2226 HOTSPOT_JNI_SETSHORTFIELD_RETURN())
2227 DEFINE_SETFIELD(jint, int, Int, 'I', i
2228 , HOTSPOT_JNI_SETINTFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value),
2229 HOTSPOT_JNI_SETINTFIELD_RETURN())
2230 DEFINE_SETFIELD(jlong, long, Long, 'J', j
2231 , HOTSPOT_JNI_SETLONGFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value),
2232 HOTSPOT_JNI_SETLONGFIELD_RETURN())
2233 // Float and double probes don't return value because dtrace doesn't currently support it
2234 DEFINE_SETFIELD(jfloat, float, Float, 'F', f
2235 , HOTSPOT_JNI_SETFLOATFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2236 HOTSPOT_JNI_SETFLOATFIELD_RETURN())
2237 DEFINE_SETFIELD(jdouble, double, Double, 'D', d
2238 , HOTSPOT_JNI_SETDOUBLEFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2239 HOTSPOT_JNI_SETDOUBLEFIELD_RETURN())
2240
2241 DT_RETURN_MARK_DECL(ToReflectedField, jobject
2242 , HOTSPOT_JNI_TOREFLECTEDFIELD_RETURN(_ret_ref));
2243
2244 JNI_ENTRY(jobject, jni_ToReflectedField(JNIEnv *env, jclass cls, jfieldID fieldID, jboolean isStatic))
2245 JNIWrapper("ToReflectedField");
2246 HOTSPOT_JNI_TOREFLECTEDFIELD_ENTRY(env, cls, (uintptr_t) fieldID, isStatic);
2247 jobject ret = NULL;
2248 DT_RETURN_MARK(ToReflectedField, jobject, (const jobject&)ret);
2249
2250 fieldDescriptor fd;
2251 bool found = false;
2252 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2253
2254 assert(jfieldIDWorkaround::is_static_jfieldID(fieldID) == (isStatic != 0), "invalid fieldID");
2255
2256 if (isStatic) {
2257 // Static field. The fieldID a JNIid specifying the field holder and the offset within the Klass*.
2258 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID);
2259 assert(id->is_static_field_id(), "invalid static field id");
2260 found = id->find_local_field(&fd);
2261 } else {
2262 // Non-static field. The fieldID is really the offset of the field within the instanceOop.
2263 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID);
2264 found = InstanceKlass::cast(k)->find_field_from_offset(offset, false, &fd);
2265 }
2266 assert(found, "bad fieldID passed into jni_ToReflectedField");
2267 oop reflected = Reflection::new_field(&fd, CHECK_NULL);
2268 ret = JNIHandles::make_local(env, reflected);
2269 return ret;
2270 JNI_END
2271
2272
2273 //
2274 // Accessing Static Fields
2275 //
2276 DT_RETURN_MARK_DECL(GetStaticFieldID, jfieldID
2277 , HOTSPOT_JNI_GETSTATICFIELDID_RETURN((uintptr_t)_ret_ref));
2278
2279 JNI_ENTRY(jfieldID, jni_GetStaticFieldID(JNIEnv *env, jclass clazz,
2280 const char *name, const char *sig))
2281 JNIWrapper("GetStaticFieldID");
2282 HOTSPOT_JNI_GETSTATICFIELDID_ENTRY(env, clazz, (char *) name, (char *) sig);
2283 jfieldID ret = NULL;
2284 DT_RETURN_MARK(GetStaticFieldID, jfieldID, (const jfieldID&)ret);
2285
2286 // The class should have been loaded (we have an instance of the class
2287 // passed in) so the field and signature should already be in the symbol
2288 // table. If they're not there, the field doesn't exist.
2289 TempNewSymbol fieldname = SymbolTable::probe(name, (int)strlen(name));
2290 TempNewSymbol signame = SymbolTable::probe(sig, (int)strlen(sig));
2291 if (fieldname == NULL || signame == NULL) {
2292 THROW_MSG_0(vmSymbols::java_lang_NoSuchFieldError(), (char*) name);
2293 }
2294 KlassHandle k(THREAD,
2295 java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz)));
2296 // Make sure class is initialized before handing id's out to static fields
2297 k()->initialize(CHECK_NULL);
2298
2299 fieldDescriptor fd;
2300 if (!k()->is_instance_klass() ||
2301 !InstanceKlass::cast(k())->find_field(fieldname, signame, true, &fd)) {
2302 THROW_MSG_0(vmSymbols::java_lang_NoSuchFieldError(), (char*) name);
2303 }
2304
2305 // A jfieldID for a static field is a JNIid specifying the field holder and the offset within the Klass*
2306 JNIid* id = fd.field_holder()->jni_id_for(fd.offset());
2307 debug_only(id->set_is_static_field_id();)
2308
2309 debug_only(id->verify(fd.field_holder()));
2310
2311 ret = jfieldIDWorkaround::to_static_jfieldID(id);
2312 return ret;
2313 JNI_END
2314
2315
2316 JNI_ENTRY(jobject, jni_GetStaticObjectField(JNIEnv *env, jclass clazz, jfieldID fieldID))
2317 JNIWrapper("GetStaticObjectField");
2318 HOTSPOT_JNI_GETSTATICOBJECTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID);
2319 #if INCLUDE_JNI_CHECK
2320 DEBUG_ONLY(Klass* param_k = jniCheck::validate_class(thread, clazz);)
2321 #endif // INCLUDE_JNI_CHECK
2322 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID);
2323 assert(id->is_static_field_id(), "invalid static field id");
2324 // Keep JVMTI addition small and only check enabled flag here.
2325 // jni_GetField_probe() assumes that is okay to create handles.
2326 if (JvmtiExport::should_post_field_access()) {
2327 JvmtiExport::jni_GetField_probe(thread, NULL, NULL, id->holder(), fieldID, true);
2328 }
2329 jobject ret = JNIHandles::make_local(id->holder()->java_mirror()->obj_field(id->offset()));
2330 HOTSPOT_JNI_GETSTATICOBJECTFIELD_RETURN(ret);
2331 return ret;
2332 JNI_END
2333
2334
2335 #define DEFINE_GETSTATICFIELD(Return,Fieldname,Result \
2336 , EntryProbe, ReturnProbe) \
2337 \
2338 DT_RETURN_MARK_DECL_FOR(Result, GetStatic##Result##Field, Return \
2339 , ReturnProbe); \
2340 \
2341 JNI_ENTRY(Return, jni_GetStatic##Result##Field(JNIEnv *env, jclass clazz, jfieldID fieldID)) \
2342 JNIWrapper("GetStatic" XSTR(Result) "Field"); \
2343 EntryProbe; \
2344 Return ret = 0;\
2345 DT_RETURN_MARK_FOR(Result, GetStatic##Result##Field, Return, \
2346 (const Return&)ret);\
2347 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID); \
2348 assert(id->is_static_field_id(), "invalid static field id"); \
2349 /* Keep JVMTI addition small and only check enabled flag here. */ \
2350 /* jni_GetField_probe() assumes that is okay to create handles. */ \
2351 if (JvmtiExport::should_post_field_access()) { \
2352 JvmtiExport::jni_GetField_probe(thread, NULL, NULL, id->holder(), fieldID, true); \
2353 } \
2354 ret = id->holder()->java_mirror()-> Fieldname##_field (id->offset()); \
2355 return ret;\
2356 JNI_END
2357
2358 DEFINE_GETSTATICFIELD(jboolean, bool, Boolean
2359 , HOTSPOT_JNI_GETSTATICBOOLEANFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICBOOLEANFIELD_RETURN(_ret_ref))
2360 DEFINE_GETSTATICFIELD(jbyte, byte, Byte
2361 , HOTSPOT_JNI_GETSTATICBYTEFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICBYTEFIELD_RETURN(_ret_ref) )
2362 DEFINE_GETSTATICFIELD(jchar, char, Char
2363 , HOTSPOT_JNI_GETSTATICCHARFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICCHARFIELD_RETURN(_ret_ref) )
2364 DEFINE_GETSTATICFIELD(jshort, short, Short
2365 , HOTSPOT_JNI_GETSTATICSHORTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICSHORTFIELD_RETURN(_ret_ref) )
2366 DEFINE_GETSTATICFIELD(jint, int, Int
2367 , HOTSPOT_JNI_GETSTATICINTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICINTFIELD_RETURN(_ret_ref) )
2368 DEFINE_GETSTATICFIELD(jlong, long, Long
2369 , HOTSPOT_JNI_GETSTATICLONGFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICLONGFIELD_RETURN(_ret_ref) )
2370 // Float and double probes don't return value because dtrace doesn't currently support it
2371 DEFINE_GETSTATICFIELD(jfloat, float, Float
2372 , HOTSPOT_JNI_GETSTATICFLOATFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICFLOATFIELD_RETURN() )
2373 DEFINE_GETSTATICFIELD(jdouble, double, Double
2374 , HOTSPOT_JNI_GETSTATICDOUBLEFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICDOUBLEFIELD_RETURN() )
2375
2376 JNI_ENTRY(void, jni_SetStaticObjectField(JNIEnv *env, jclass clazz, jfieldID fieldID, jobject value))
2377 JNIWrapper("SetStaticObjectField");
2378 HOTSPOT_JNI_SETSTATICOBJECTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value);
2379 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID);
2380 assert(id->is_static_field_id(), "invalid static field id");
2381 // Keep JVMTI addition small and only check enabled flag here.
2382 // jni_SetField_probe() assumes that is okay to create handles.
2383 if (JvmtiExport::should_post_field_modification()) {
2384 jvalue field_value;
2385 field_value.l = value;
2386 JvmtiExport::jni_SetField_probe(thread, NULL, NULL, id->holder(), fieldID, true, 'L', (jvalue *)&field_value);
2387 }
2388 id->holder()->java_mirror()->obj_field_put(id->offset(), JNIHandles::resolve(value));
2389 HOTSPOT_JNI_SETSTATICOBJECTFIELD_RETURN();
2390 JNI_END
2391
2392
2393
2394 #define DEFINE_SETSTATICFIELD(Argument,Fieldname,Result,SigType,unionType \
2395 , EntryProbe, ReturnProbe) \
2396 \
2397 JNI_ENTRY(void, jni_SetStatic##Result##Field(JNIEnv *env, jclass clazz, jfieldID fieldID, Argument value)) \
2398 JNIWrapper("SetStatic" XSTR(Result) "Field"); \
2399 EntryProbe; \
2400 \
2401 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID); \
2402 assert(id->is_static_field_id(), "invalid static field id"); \
2403 /* Keep JVMTI addition small and only check enabled flag here. */ \
2404 /* jni_SetField_probe() assumes that is okay to create handles. */ \
2405 if (JvmtiExport::should_post_field_modification()) { \
2406 jvalue field_value; \
2407 field_value.unionType = value; \
2408 JvmtiExport::jni_SetField_probe(thread, NULL, NULL, id->holder(), fieldID, true, SigType, (jvalue *)&field_value); \
2409 } \
2410 if (SigType == 'Z') { value = ((jboolean)value) & 1; } \
2411 id->holder()->java_mirror()-> Fieldname##_field_put (id->offset(), value); \
2412 ReturnProbe;\
2413 JNI_END
2414
2415 DEFINE_SETSTATICFIELD(jboolean, bool, Boolean, 'Z', z
2416 , HOTSPOT_JNI_SETSTATICBOOLEANFIELD_ENTRY(env, clazz, (uintptr_t)fieldID, value),
2417 HOTSPOT_JNI_SETSTATICBOOLEANFIELD_RETURN())
2418 DEFINE_SETSTATICFIELD(jbyte, byte, Byte, 'B', b
2419 , HOTSPOT_JNI_SETSTATICBYTEFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value),
2420 HOTSPOT_JNI_SETSTATICBYTEFIELD_RETURN())
2421 DEFINE_SETSTATICFIELD(jchar, char, Char, 'C', c
2422 , HOTSPOT_JNI_SETSTATICCHARFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value),
2423 HOTSPOT_JNI_SETSTATICCHARFIELD_RETURN())
2424 DEFINE_SETSTATICFIELD(jshort, short, Short, 'S', s
2425 , HOTSPOT_JNI_SETSTATICSHORTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value),
2426 HOTSPOT_JNI_SETSTATICSHORTFIELD_RETURN())
2427 DEFINE_SETSTATICFIELD(jint, int, Int, 'I', i
2428 , HOTSPOT_JNI_SETSTATICINTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value),
2429 HOTSPOT_JNI_SETSTATICINTFIELD_RETURN())
2430 DEFINE_SETSTATICFIELD(jlong, long, Long, 'J', j
2431 , HOTSPOT_JNI_SETSTATICLONGFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value),
2432 HOTSPOT_JNI_SETSTATICLONGFIELD_RETURN())
2433 // Float and double probes don't return value because dtrace doesn't currently support it
2434 DEFINE_SETSTATICFIELD(jfloat, float, Float, 'F', f
2435 , HOTSPOT_JNI_SETSTATICFLOATFIELD_ENTRY(env, clazz, (uintptr_t) fieldID),
2436 HOTSPOT_JNI_SETSTATICFLOATFIELD_RETURN())
2437 DEFINE_SETSTATICFIELD(jdouble, double, Double, 'D', d
2438 , HOTSPOT_JNI_SETSTATICDOUBLEFIELD_ENTRY(env, clazz, (uintptr_t) fieldID),
2439 HOTSPOT_JNI_SETSTATICDOUBLEFIELD_RETURN())
2440
2441 //
2442 // String Operations
2443 //
2444
2445 // Unicode Interface
2446
2447 DT_RETURN_MARK_DECL(NewString, jstring
2448 , HOTSPOT_JNI_NEWSTRING_RETURN(_ret_ref));
2449
2450 JNI_ENTRY(jstring, jni_NewString(JNIEnv *env, const jchar *unicodeChars, jsize len))
2451 JNIWrapper("NewString");
2452 HOTSPOT_JNI_NEWSTRING_ENTRY(env, (uint16_t *) unicodeChars, len);
2453 jstring ret = NULL;
2454 DT_RETURN_MARK(NewString, jstring, (const jstring&)ret);
2455 oop string=java_lang_String::create_oop_from_unicode((jchar*) unicodeChars, len, CHECK_NULL);
2456 ret = (jstring) JNIHandles::make_local(env, string);
2457 return ret;
2458 JNI_END
2459
2460
2461 JNI_QUICK_ENTRY(jsize, jni_GetStringLength(JNIEnv *env, jstring string))
2462 JNIWrapper("GetStringLength");
2463 HOTSPOT_JNI_GETSTRINGLENGTH_ENTRY(env, string);
2464 jsize ret = 0;
2465 oop s = JNIHandles::resolve_non_null(string);
2466 if (java_lang_String::value(s) != NULL) {
2467 ret = java_lang_String::length(s);
2468 }
2469 HOTSPOT_JNI_GETSTRINGLENGTH_RETURN(ret);
2470 return ret;
2471 JNI_END
2472
2473
2474 JNI_QUICK_ENTRY(const jchar*, jni_GetStringChars(
2475 JNIEnv *env, jstring string, jboolean *isCopy))
2476 JNIWrapper("GetStringChars");
2477 HOTSPOT_JNI_GETSTRINGCHARS_ENTRY(env, string, (uintptr_t *) isCopy);
2478 jchar* buf = NULL;
2479 oop s = JNIHandles::resolve_non_null(string);
2480 typeArrayOop s_value = java_lang_String::value(s);
2481 if (s_value != NULL) {
2482 int s_len = java_lang_String::length(s);
2483 bool is_latin1 = java_lang_String::is_latin1(s);
2484 buf = NEW_C_HEAP_ARRAY_RETURN_NULL(jchar, s_len + 1, mtInternal); // add one for zero termination
2485 /* JNI Specification states return NULL on OOM */
2486 if (buf != NULL) {
2487 if (s_len > 0) {
2488 if (!is_latin1) {
2489 memcpy(buf, s_value->char_at_addr(0), sizeof(jchar)*s_len);
2490 } else {
2491 for (int i = 0; i < s_len; i++) {
2492 buf[i] = ((jchar) s_value->byte_at(i)) & 0xff;
2493 }
2494 }
2495 }
2496 buf[s_len] = 0;
2497 //%note jni_5
2498 if (isCopy != NULL) {
2499 *isCopy = JNI_TRUE;
2500 }
2501 }
2502 }
2503 HOTSPOT_JNI_GETSTRINGCHARS_RETURN(buf);
2504 return buf;
2505 JNI_END
2506
2507
2508 JNI_QUICK_ENTRY(void, jni_ReleaseStringChars(JNIEnv *env, jstring str, const jchar *chars))
2509 JNIWrapper("ReleaseStringChars");
2510 HOTSPOT_JNI_RELEASESTRINGCHARS_ENTRY(env, str, (uint16_t *) chars);
2511 //%note jni_6
2512 if (chars != NULL) {
2513 // Since String objects are supposed to be immutable, don't copy any
2514 // new data back. A bad user will have to go after the char array.
2515 FreeHeap((void*) chars);
2516 }
2517 HOTSPOT_JNI_RELEASESTRINGCHARS_RETURN();
2518 JNI_END
2519
2520
2521 // UTF Interface
2522
2523 DT_RETURN_MARK_DECL(NewStringUTF, jstring
2524 , HOTSPOT_JNI_NEWSTRINGUTF_RETURN(_ret_ref));
2525
2526 JNI_ENTRY(jstring, jni_NewStringUTF(JNIEnv *env, const char *bytes))
2527 JNIWrapper("NewStringUTF");
2528 HOTSPOT_JNI_NEWSTRINGUTF_ENTRY(env, (char *) bytes);
2529 jstring ret;
2530 DT_RETURN_MARK(NewStringUTF, jstring, (const jstring&)ret);
2531
2532 oop result = java_lang_String::create_oop_from_str((char*) bytes, CHECK_NULL);
2533 ret = (jstring) JNIHandles::make_local(env, result);
2534 return ret;
2535 JNI_END
2536
2537
2538 JNI_ENTRY(jsize, jni_GetStringUTFLength(JNIEnv *env, jstring string))
2539 JNIWrapper("GetStringUTFLength");
2540 HOTSPOT_JNI_GETSTRINGUTFLENGTH_ENTRY(env, string);
2541 jsize ret = 0;
2542 oop java_string = JNIHandles::resolve_non_null(string);
2543 if (java_lang_String::value(java_string) != NULL) {
2544 ret = java_lang_String::utf8_length(java_string);
2545 }
2546 HOTSPOT_JNI_GETSTRINGUTFLENGTH_RETURN(ret);
2547 return ret;
2548 JNI_END
2549
2550
2551 JNI_ENTRY(const char*, jni_GetStringUTFChars(JNIEnv *env, jstring string, jboolean *isCopy))
2552 JNIWrapper("GetStringUTFChars");
2553 HOTSPOT_JNI_GETSTRINGUTFCHARS_ENTRY(env, string, (uintptr_t *) isCopy);
2554 char* result = NULL;
2555 oop java_string = JNIHandles::resolve_non_null(string);
2556 if (java_lang_String::value(java_string) != NULL) {
2557 size_t length = java_lang_String::utf8_length(java_string);
2558 /* JNI Specification states return NULL on OOM */
2559 result = AllocateHeap(length + 1, mtInternal, 0, AllocFailStrategy::RETURN_NULL);
2560 if (result != NULL) {
2561 java_lang_String::as_utf8_string(java_string, result, (int) length + 1);
2562 if (isCopy != NULL) {
2563 *isCopy = JNI_TRUE;
2564 }
2565 }
2566 }
2567 HOTSPOT_JNI_GETSTRINGUTFCHARS_RETURN(result);
2568 return result;
2569 JNI_END
2570
2571
2572 JNI_LEAF(void, jni_ReleaseStringUTFChars(JNIEnv *env, jstring str, const char *chars))
2573 JNIWrapper("ReleaseStringUTFChars");
2574 HOTSPOT_JNI_RELEASESTRINGUTFCHARS_ENTRY(env, str, (char *) chars);
2575 if (chars != NULL) {
2576 FreeHeap((char*) chars);
2577 }
2578 HOTSPOT_JNI_RELEASESTRINGUTFCHARS_RETURN();
2579 JNI_END
2580
2581
2582 JNI_QUICK_ENTRY(jsize, jni_GetArrayLength(JNIEnv *env, jarray array))
2583 JNIWrapper("GetArrayLength");
2584 HOTSPOT_JNI_GETARRAYLENGTH_ENTRY(env, array);
2585 arrayOop a = arrayOop(JNIHandles::resolve_non_null(array));
2586 assert(a->is_array(), "must be array");
2587 jsize ret = a->length();
2588 HOTSPOT_JNI_GETARRAYLENGTH_RETURN(ret);
2589 return ret;
2590 JNI_END
2591
2592
2593 //
2594 // Object Array Operations
2595 //
2596
2597 DT_RETURN_MARK_DECL(NewObjectArray, jobjectArray
2598 , HOTSPOT_JNI_NEWOBJECTARRAY_RETURN(_ret_ref));
2599
2600 JNI_ENTRY(jobjectArray, jni_NewObjectArray(JNIEnv *env, jsize length, jclass elementClass, jobject initialElement))
2601 JNIWrapper("NewObjectArray");
2602 HOTSPOT_JNI_NEWOBJECTARRAY_ENTRY(env, length, elementClass, initialElement);
2603 jobjectArray ret = NULL;
2604 DT_RETURN_MARK(NewObjectArray, jobjectArray, (const jobjectArray&)ret);
2605 KlassHandle ek(THREAD, java_lang_Class::as_Klass(JNIHandles::resolve_non_null(elementClass)));
2606 Klass* ako = ek()->array_klass(CHECK_NULL);
2607 KlassHandle ak = KlassHandle(THREAD, ako);
2608 ObjArrayKlass::cast(ak())->initialize(CHECK_NULL);
2609 objArrayOop result = ObjArrayKlass::cast(ak())->allocate(length, CHECK_NULL);
2610 oop initial_value = JNIHandles::resolve(initialElement);
2611 if (initial_value != NULL) { // array already initialized with NULL
2612 for (int index = 0; index < length; index++) {
2613 result->obj_at_put(index, initial_value);
2614 }
2615 }
2616 ret = (jobjectArray) JNIHandles::make_local(env, result);
2617 return ret;
2618 JNI_END
2619
2620 DT_RETURN_MARK_DECL(GetObjectArrayElement, jobject
2621 , HOTSPOT_JNI_GETOBJECTARRAYELEMENT_RETURN(_ret_ref));
2622
2623 JNI_ENTRY(jobject, jni_GetObjectArrayElement(JNIEnv *env, jobjectArray array, jsize index))
2624 JNIWrapper("GetObjectArrayElement");
2625 HOTSPOT_JNI_GETOBJECTARRAYELEMENT_ENTRY(env, array, index);
2626 jobject ret = NULL;
2627 DT_RETURN_MARK(GetObjectArrayElement, jobject, (const jobject&)ret);
2628 objArrayOop a = objArrayOop(JNIHandles::resolve_non_null(array));
2629 if (a->is_within_bounds(index)) {
2630 ret = JNIHandles::make_local(env, a->obj_at(index));
2631 return ret;
2632 } else {
2633 char buf[jintAsStringSize];
2634 sprintf(buf, "%d", index);
2635 THROW_MSG_0(vmSymbols::java_lang_ArrayIndexOutOfBoundsException(), buf);
2636 }
2637 JNI_END
2638
2639 DT_VOID_RETURN_MARK_DECL(SetObjectArrayElement
2640 , HOTSPOT_JNI_SETOBJECTARRAYELEMENT_RETURN());
2641
2642 JNI_ENTRY(void, jni_SetObjectArrayElement(JNIEnv *env, jobjectArray array, jsize index, jobject value))
2643 JNIWrapper("SetObjectArrayElement");
2644 HOTSPOT_JNI_SETOBJECTARRAYELEMENT_ENTRY(env, array, index, value);
2645 DT_VOID_RETURN_MARK(SetObjectArrayElement);
2646
2647 objArrayOop a = objArrayOop(JNIHandles::resolve_non_null(array));
2648 oop v = JNIHandles::resolve(value);
2649 if (a->is_within_bounds(index)) {
2650 if (v == NULL || v->is_a(ObjArrayKlass::cast(a->klass())->element_klass())) {
2651 a->obj_at_put(index, v);
2652 } else {
2653 THROW(vmSymbols::java_lang_ArrayStoreException());
2654 }
2655 } else {
2656 char buf[jintAsStringSize];
2657 sprintf(buf, "%d", index);
2658 THROW_MSG(vmSymbols::java_lang_ArrayIndexOutOfBoundsException(), buf);
2659 }
2660 JNI_END
2661
2662
2663
2664 #define DEFINE_NEWSCALARARRAY(Return,Allocator,Result \
2665 ,EntryProbe,ReturnProbe) \
2666 \
2667 DT_RETURN_MARK_DECL(New##Result##Array, Return \
2668 , ReturnProbe); \
2669 \
2670 JNI_ENTRY(Return, \
2671 jni_New##Result##Array(JNIEnv *env, jsize len)) \
2672 JNIWrapper("New" XSTR(Result) "Array"); \
2673 EntryProbe; \
2674 Return ret = NULL;\
2675 DT_RETURN_MARK(New##Result##Array, Return, (const Return&)ret);\
2676 \
2677 oop obj= oopFactory::Allocator(len, CHECK_0); \
2678 ret = (Return) JNIHandles::make_local(env, obj); \
2679 return ret;\
2680 JNI_END
2681
2682 DEFINE_NEWSCALARARRAY(jbooleanArray, new_boolArray, Boolean,
2683 HOTSPOT_JNI_NEWBOOLEANARRAY_ENTRY(env, len),
2684 HOTSPOT_JNI_NEWBOOLEANARRAY_RETURN(_ret_ref))
2685 DEFINE_NEWSCALARARRAY(jbyteArray, new_byteArray, Byte,
2686 HOTSPOT_JNI_NEWBYTEARRAY_ENTRY(env, len),
2687 HOTSPOT_JNI_NEWBYTEARRAY_RETURN(_ret_ref))
2688 DEFINE_NEWSCALARARRAY(jshortArray, new_shortArray, Short,
2689 HOTSPOT_JNI_NEWSHORTARRAY_ENTRY(env, len),
2690 HOTSPOT_JNI_NEWSHORTARRAY_RETURN(_ret_ref))
2691 DEFINE_NEWSCALARARRAY(jcharArray, new_charArray, Char,
2692 HOTSPOT_JNI_NEWCHARARRAY_ENTRY(env, len),
2693 HOTSPOT_JNI_NEWCHARARRAY_RETURN(_ret_ref))
2694 DEFINE_NEWSCALARARRAY(jintArray, new_intArray, Int,
2695 HOTSPOT_JNI_NEWINTARRAY_ENTRY(env, len),
2696 HOTSPOT_JNI_NEWINTARRAY_RETURN(_ret_ref))
2697 DEFINE_NEWSCALARARRAY(jlongArray, new_longArray, Long,
2698 HOTSPOT_JNI_NEWLONGARRAY_ENTRY(env, len),
2699 HOTSPOT_JNI_NEWLONGARRAY_RETURN(_ret_ref))
2700 DEFINE_NEWSCALARARRAY(jfloatArray, new_singleArray, Float,
2701 HOTSPOT_JNI_NEWFLOATARRAY_ENTRY(env, len),
2702 HOTSPOT_JNI_NEWFLOATARRAY_RETURN(_ret_ref))
2703 DEFINE_NEWSCALARARRAY(jdoubleArray, new_doubleArray, Double,
2704 HOTSPOT_JNI_NEWDOUBLEARRAY_ENTRY(env, len),
2705 HOTSPOT_JNI_NEWDOUBLEARRAY_RETURN(_ret_ref))
2706
2707 // Return an address which will fault if the caller writes to it.
2708
2709 static char* get_bad_address() {
2710 static char* bad_address = NULL;
2711 if (bad_address == NULL) {
2712 size_t size = os::vm_allocation_granularity();
2713 bad_address = os::reserve_memory(size);
2714 if (bad_address != NULL) {
2715 os::protect_memory(bad_address, size, os::MEM_PROT_READ,
2716 /*is_committed*/false);
2717 MemTracker::record_virtual_memory_type((void*)bad_address, mtInternal);
2718 }
2719 }
2720 return bad_address;
2721 }
2722
2723
2724
2725 #define DEFINE_GETSCALARARRAYELEMENTS(ElementTag,ElementType,Result, Tag \
2726 , EntryProbe, ReturnProbe) \
2727 \
2728 JNI_QUICK_ENTRY(ElementType*, \
2729 jni_Get##Result##ArrayElements(JNIEnv *env, ElementType##Array array, jboolean *isCopy)) \
2730 JNIWrapper("Get" XSTR(Result) "ArrayElements"); \
2731 EntryProbe; \
2732 /* allocate an chunk of memory in c land */ \
2733 typeArrayOop a = typeArrayOop(JNIHandles::resolve_non_null(array)); \
2734 ElementType* result; \
2735 int len = a->length(); \
2736 if (len == 0) { \
2737 /* Empty array: legal but useless, can't return NULL. \
2738 * Return a pointer to something useless. \
2739 * Avoid asserts in typeArrayOop. */ \
2740 result = (ElementType*)get_bad_address(); \
2741 } else { \
2742 /* JNI Specification states return NULL on OOM */ \
2743 result = NEW_C_HEAP_ARRAY_RETURN_NULL(ElementType, len, mtInternal); \
2744 if (result != NULL) { \
2745 /* copy the array to the c chunk */ \
2746 memcpy(result, a->Tag##_at_addr(0), sizeof(ElementType)*len); \
2747 if (isCopy) { \
2748 *isCopy = JNI_TRUE; \
2749 } \
2750 } \
2751 } \
2752 ReturnProbe; \
2753 return result; \
2754 JNI_END
2755
2756 DEFINE_GETSCALARARRAYELEMENTS(T_BOOLEAN, jboolean, Boolean, bool
2757 , HOTSPOT_JNI_GETBOOLEANARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy),
2758 HOTSPOT_JNI_GETBOOLEANARRAYELEMENTS_RETURN((uintptr_t*)result))
2759 DEFINE_GETSCALARARRAYELEMENTS(T_BYTE, jbyte, Byte, byte
2760 , HOTSPOT_JNI_GETBYTEARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy),
2761 HOTSPOT_JNI_GETBYTEARRAYELEMENTS_RETURN((char*)result))
2762 DEFINE_GETSCALARARRAYELEMENTS(T_SHORT, jshort, Short, short
2763 , HOTSPOT_JNI_GETSHORTARRAYELEMENTS_ENTRY(env, (uint16_t*) array, (uintptr_t *) isCopy),
2764 HOTSPOT_JNI_GETSHORTARRAYELEMENTS_RETURN((uint16_t*)result))
2765 DEFINE_GETSCALARARRAYELEMENTS(T_CHAR, jchar, Char, char
2766 , HOTSPOT_JNI_GETCHARARRAYELEMENTS_ENTRY(env, (uint16_t*) array, (uintptr_t *) isCopy),
2767 HOTSPOT_JNI_GETCHARARRAYELEMENTS_RETURN(result))
2768 DEFINE_GETSCALARARRAYELEMENTS(T_INT, jint, Int, int
2769 , HOTSPOT_JNI_GETINTARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy),
2770 HOTSPOT_JNI_GETINTARRAYELEMENTS_RETURN((uint32_t*)result))
2771 DEFINE_GETSCALARARRAYELEMENTS(T_LONG, jlong, Long, long
2772 , HOTSPOT_JNI_GETLONGARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy),
2773 HOTSPOT_JNI_GETLONGARRAYELEMENTS_RETURN(((uintptr_t*)result)))
2774 // Float and double probes don't return value because dtrace doesn't currently support it
2775 DEFINE_GETSCALARARRAYELEMENTS(T_FLOAT, jfloat, Float, float
2776 , HOTSPOT_JNI_GETFLOATARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy),
2777 HOTSPOT_JNI_GETFLOATARRAYELEMENTS_RETURN(result))
2778 DEFINE_GETSCALARARRAYELEMENTS(T_DOUBLE, jdouble, Double, double
2779 , HOTSPOT_JNI_GETDOUBLEARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy),
2780 HOTSPOT_JNI_GETDOUBLEARRAYELEMENTS_RETURN(result))
2781
2782
2783 #define DEFINE_RELEASESCALARARRAYELEMENTS(ElementTag,ElementType,Result,Tag \
2784 , EntryProbe, ReturnProbe);\
2785 \
2786 JNI_QUICK_ENTRY(void, \
2787 jni_Release##Result##ArrayElements(JNIEnv *env, ElementType##Array array, \
2788 ElementType *buf, jint mode)) \
2789 JNIWrapper("Release" XSTR(Result) "ArrayElements"); \
2790 EntryProbe; \
2791 typeArrayOop a = typeArrayOop(JNIHandles::resolve_non_null(array)); \
2792 int len = a->length(); \
2793 if (len != 0) { /* Empty array: nothing to free or copy. */ \
2794 if ((mode == 0) || (mode == JNI_COMMIT)) { \
2795 memcpy(a->Tag##_at_addr(0), buf, sizeof(ElementType)*len); \
2796 } \
2797 if ((mode == 0) || (mode == JNI_ABORT)) { \
2798 FreeHeap(buf); \
2799 } \
2800 } \
2801 ReturnProbe; \
2802 JNI_END
2803
2804 DEFINE_RELEASESCALARARRAYELEMENTS(T_BOOLEAN, jboolean, Boolean, bool
2805 , HOTSPOT_JNI_RELEASEBOOLEANARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) buf, mode),
2806 HOTSPOT_JNI_RELEASEBOOLEANARRAYELEMENTS_RETURN())
2807 DEFINE_RELEASESCALARARRAYELEMENTS(T_BYTE, jbyte, Byte, byte
2808 , HOTSPOT_JNI_RELEASEBYTEARRAYELEMENTS_ENTRY(env, array, (char *) buf, mode),
2809 HOTSPOT_JNI_RELEASEBYTEARRAYELEMENTS_RETURN())
2810 DEFINE_RELEASESCALARARRAYELEMENTS(T_SHORT, jshort, Short, short
2811 , HOTSPOT_JNI_RELEASESHORTARRAYELEMENTS_ENTRY(env, array, (uint16_t *) buf, mode),
2812 HOTSPOT_JNI_RELEASESHORTARRAYELEMENTS_RETURN())
2813 DEFINE_RELEASESCALARARRAYELEMENTS(T_CHAR, jchar, Char, char
2814 , HOTSPOT_JNI_RELEASECHARARRAYELEMENTS_ENTRY(env, array, (uint16_t *) buf, mode),
2815 HOTSPOT_JNI_RELEASECHARARRAYELEMENTS_RETURN())
2816 DEFINE_RELEASESCALARARRAYELEMENTS(T_INT, jint, Int, int
2817 , HOTSPOT_JNI_RELEASEINTARRAYELEMENTS_ENTRY(env, array, (uint32_t *) buf, mode),
2818 HOTSPOT_JNI_RELEASEINTARRAYELEMENTS_RETURN())
2819 DEFINE_RELEASESCALARARRAYELEMENTS(T_LONG, jlong, Long, long
2820 , HOTSPOT_JNI_RELEASELONGARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) buf, mode),
2821 HOTSPOT_JNI_RELEASELONGARRAYELEMENTS_RETURN())
2822 DEFINE_RELEASESCALARARRAYELEMENTS(T_FLOAT, jfloat, Float, float
2823 , HOTSPOT_JNI_RELEASEFLOATARRAYELEMENTS_ENTRY(env, array, (float *) buf, mode),
2824 HOTSPOT_JNI_RELEASEFLOATARRAYELEMENTS_RETURN())
2825 DEFINE_RELEASESCALARARRAYELEMENTS(T_DOUBLE, jdouble, Double, double
2826 , HOTSPOT_JNI_RELEASEDOUBLEARRAYELEMENTS_ENTRY(env, array, (double *) buf, mode),
2827 HOTSPOT_JNI_RELEASEDOUBLEARRAYELEMENTS_RETURN())
2828
2829
2830 #define DEFINE_GETSCALARARRAYREGION(ElementTag,ElementType,Result, Tag \
2831 , EntryProbe, ReturnProbe); \
2832 DT_VOID_RETURN_MARK_DECL(Get##Result##ArrayRegion \
2833 , ReturnProbe); \
2834 \
2835 JNI_ENTRY(void, \
2836 jni_Get##Result##ArrayRegion(JNIEnv *env, ElementType##Array array, jsize start, \
2837 jsize len, ElementType *buf)) \
2838 JNIWrapper("Get" XSTR(Result) "ArrayRegion"); \
2839 EntryProbe; \
2840 DT_VOID_RETURN_MARK(Get##Result##ArrayRegion); \
2841 typeArrayOop src = typeArrayOop(JNIHandles::resolve_non_null(array)); \
2842 if (start < 0 || len < 0 || ((unsigned int)start + (unsigned int)len > (unsigned int)src->length())) { \
2843 THROW(vmSymbols::java_lang_ArrayIndexOutOfBoundsException()); \
2844 } else { \
2845 if (len > 0) { \
2846 int sc = TypeArrayKlass::cast(src->klass())->log2_element_size(); \
2847 memcpy((u_char*) buf, \
2848 (u_char*) src->Tag##_at_addr(start), \
2849 len << sc); \
2850 } \
2851 } \
2852 JNI_END
2853
2854 DEFINE_GETSCALARARRAYREGION(T_BOOLEAN, jboolean,Boolean, bool
2855 , HOTSPOT_JNI_GETBOOLEANARRAYREGION_ENTRY(env, array, start, len, (uintptr_t *) buf),
2856 HOTSPOT_JNI_GETBOOLEANARRAYREGION_RETURN());
2857 DEFINE_GETSCALARARRAYREGION(T_BYTE, jbyte, Byte, byte
2858 , HOTSPOT_JNI_GETBYTEARRAYREGION_ENTRY(env, array, start, len, (char *) buf),
2859 HOTSPOT_JNI_GETBYTEARRAYREGION_RETURN());
2860 DEFINE_GETSCALARARRAYREGION(T_SHORT, jshort, Short, short
2861 , HOTSPOT_JNI_GETSHORTARRAYREGION_ENTRY(env, array, start, len, (uint16_t *) buf),
2862 HOTSPOT_JNI_GETSHORTARRAYREGION_RETURN());
2863 DEFINE_GETSCALARARRAYREGION(T_CHAR, jchar, Char, char
2864 , HOTSPOT_JNI_GETCHARARRAYREGION_ENTRY(env, array, start, len, (uint16_t*) buf),
2865 HOTSPOT_JNI_GETCHARARRAYREGION_RETURN());
2866 DEFINE_GETSCALARARRAYREGION(T_INT, jint, Int, int
2867 , HOTSPOT_JNI_GETINTARRAYREGION_ENTRY(env, array, start, len, (uint32_t*) buf),
2868 HOTSPOT_JNI_GETINTARRAYREGION_RETURN());
2869 DEFINE_GETSCALARARRAYREGION(T_LONG, jlong, Long, long
2870 , HOTSPOT_JNI_GETLONGARRAYREGION_ENTRY(env, array, start, len, (uintptr_t *) buf),
2871 HOTSPOT_JNI_GETLONGARRAYREGION_RETURN());
2872 DEFINE_GETSCALARARRAYREGION(T_FLOAT, jfloat, Float, float
2873 , HOTSPOT_JNI_GETFLOATARRAYREGION_ENTRY(env, array, start, len, (float *) buf),
2874 HOTSPOT_JNI_GETFLOATARRAYREGION_RETURN());
2875 DEFINE_GETSCALARARRAYREGION(T_DOUBLE, jdouble, Double, double
2876 , HOTSPOT_JNI_GETDOUBLEARRAYREGION_ENTRY(env, array, start, len, (double *) buf),
2877 HOTSPOT_JNI_GETDOUBLEARRAYREGION_RETURN());
2878
2879
2880 #define DEFINE_SETSCALARARRAYREGION(ElementTag,ElementType,Result, Tag \
2881 , EntryProbe, ReturnProbe); \
2882 DT_VOID_RETURN_MARK_DECL(Set##Result##ArrayRegion \
2883 ,ReturnProbe); \
2884 \
2885 JNI_ENTRY(void, \
2886 jni_Set##Result##ArrayRegion(JNIEnv *env, ElementType##Array array, jsize start, \
2887 jsize len, const ElementType *buf)) \
2888 JNIWrapper("Set" XSTR(Result) "ArrayRegion"); \
2889 EntryProbe; \
2890 DT_VOID_RETURN_MARK(Set##Result##ArrayRegion); \
2891 typeArrayOop dst = typeArrayOop(JNIHandles::resolve_non_null(array)); \
2892 if (start < 0 || len < 0 || ((unsigned int)start + (unsigned int)len > (unsigned int)dst->length())) { \
2893 THROW(vmSymbols::java_lang_ArrayIndexOutOfBoundsException()); \
2894 } else { \
2895 if (len > 0) { \
2896 int sc = TypeArrayKlass::cast(dst->klass())->log2_element_size(); \
2897 memcpy((u_char*) dst->Tag##_at_addr(start), \
2898 (u_char*) buf, \
2899 len << sc); \
2900 } \
2901 } \
2902 JNI_END
2903
2904 DEFINE_SETSCALARARRAYREGION(T_BOOLEAN, jboolean, Boolean, bool
2905 , HOTSPOT_JNI_SETBOOLEANARRAYREGION_ENTRY(env, array, start, len, (uintptr_t *)buf),
2906 HOTSPOT_JNI_SETBOOLEANARRAYREGION_RETURN())
2907 DEFINE_SETSCALARARRAYREGION(T_BYTE, jbyte, Byte, byte
2908 , HOTSPOT_JNI_SETBYTEARRAYREGION_ENTRY(env, array, start, len, (char *) buf),
2909 HOTSPOT_JNI_SETBYTEARRAYREGION_RETURN())
2910 DEFINE_SETSCALARARRAYREGION(T_SHORT, jshort, Short, short
2911 , HOTSPOT_JNI_SETSHORTARRAYREGION_ENTRY(env, array, start, len, (uint16_t *) buf),
2912 HOTSPOT_JNI_SETSHORTARRAYREGION_RETURN())
2913 DEFINE_SETSCALARARRAYREGION(T_CHAR, jchar, Char, char
2914 , HOTSPOT_JNI_SETCHARARRAYREGION_ENTRY(env, array, start, len, (uint16_t *) buf),
2915 HOTSPOT_JNI_SETCHARARRAYREGION_RETURN())
2916 DEFINE_SETSCALARARRAYREGION(T_INT, jint, Int, int
2917 , HOTSPOT_JNI_SETINTARRAYREGION_ENTRY(env, array, start, len, (uint32_t *) buf),
2918 HOTSPOT_JNI_SETINTARRAYREGION_RETURN())
2919 DEFINE_SETSCALARARRAYREGION(T_LONG, jlong, Long, long
2920 , HOTSPOT_JNI_SETLONGARRAYREGION_ENTRY(env, array, start, len, (uintptr_t *) buf),
2921 HOTSPOT_JNI_SETLONGARRAYREGION_RETURN())
2922 DEFINE_SETSCALARARRAYREGION(T_FLOAT, jfloat, Float, float
2923 , HOTSPOT_JNI_SETFLOATARRAYREGION_ENTRY(env, array, start, len, (float *) buf),
2924 HOTSPOT_JNI_SETFLOATARRAYREGION_RETURN())
2925 DEFINE_SETSCALARARRAYREGION(T_DOUBLE, jdouble, Double, double
2926 , HOTSPOT_JNI_SETDOUBLEARRAYREGION_ENTRY(env, array, start, len, (double *) buf),
2927 HOTSPOT_JNI_SETDOUBLEARRAYREGION_RETURN())
2928
2929
2930 //
2931 // Interception of natives
2932 //
2933
2934 // The RegisterNatives call being attempted tried to register with a method that
2935 // is not native. Ask JVM TI what prefixes have been specified. Then check
2936 // to see if the native method is now wrapped with the prefixes. See the
2937 // SetNativeMethodPrefix(es) functions in the JVM TI Spec for details.
2938 static Method* find_prefixed_native(KlassHandle k,
2939 Symbol* name, Symbol* signature, TRAPS) {
2940 #if INCLUDE_JVMTI
2941 ResourceMark rm(THREAD);
2942 Method* method;
2943 int name_len = name->utf8_length();
2944 char* name_str = name->as_utf8();
2945 int prefix_count;
2946 char** prefixes = JvmtiExport::get_all_native_method_prefixes(&prefix_count);
2947 for (int i = 0; i < prefix_count; i++) {
2948 char* prefix = prefixes[i];
2949 int prefix_len = (int)strlen(prefix);
2950
2951 // try adding this prefix to the method name and see if it matches another method name
2952 int trial_len = name_len + prefix_len;
2953 char* trial_name_str = NEW_RESOURCE_ARRAY(char, trial_len + 1);
2954 strcpy(trial_name_str, prefix);
2955 strcat(trial_name_str, name_str);
2956 TempNewSymbol trial_name = SymbolTable::probe(trial_name_str, trial_len);
2957 if (trial_name == NULL) {
2958 continue; // no such symbol, so this prefix wasn't used, try the next prefix
2959 }
2960 method = k()->lookup_method(trial_name, signature);
2961 if (method == NULL) {
2962 continue; // signature doesn't match, try the next prefix
2963 }
2964 if (method->is_native()) {
2965 method->set_is_prefixed_native();
2966 return method; // wahoo, we found a prefixed version of the method, return it
2967 }
2968 // found as non-native, so prefix is good, add it, probably just need more prefixes
2969 name_len = trial_len;
2970 name_str = trial_name_str;
2971 }
2972 #endif // INCLUDE_JVMTI
2973 return NULL; // not found
2974 }
2975
2976 static bool register_native(KlassHandle k, Symbol* name, Symbol* signature, address entry, TRAPS) {
2977 Method* method = k()->lookup_method(name, signature);
2978 if (method == NULL) {
2979 ResourceMark rm;
2980 stringStream st;
2981 st.print("Method %s name or signature does not match",
2982 Method::name_and_sig_as_C_string(k(), name, signature));
2983 THROW_MSG_(vmSymbols::java_lang_NoSuchMethodError(), st.as_string(), false);
2984 }
2985 if (!method->is_native()) {
2986 // trying to register to a non-native method, see if a JVM TI agent has added prefix(es)
2987 method = find_prefixed_native(k, name, signature, THREAD);
2988 if (method == NULL) {
2989 ResourceMark rm;
2990 stringStream st;
2991 st.print("Method %s is not declared as native",
2992 Method::name_and_sig_as_C_string(k(), name, signature));
2993 THROW_MSG_(vmSymbols::java_lang_NoSuchMethodError(), st.as_string(), false);
2994 }
2995 }
2996
2997 if (entry != NULL) {
2998 method->set_native_function(entry,
2999 Method::native_bind_event_is_interesting);
3000 } else {
3001 method->clear_native_function();
3002 }
3003 if (PrintJNIResolving) {
3004 ResourceMark rm(THREAD);
3005 tty->print_cr("[Registering JNI native method %s.%s]",
3006 method->method_holder()->external_name(),
3007 method->name()->as_C_string());
3008 }
3009 return true;
3010 }
3011
3012 DT_RETURN_MARK_DECL(RegisterNatives, jint
3013 , HOTSPOT_JNI_REGISTERNATIVES_RETURN(_ret_ref));
3014
3015 JNI_ENTRY(jint, jni_RegisterNatives(JNIEnv *env, jclass clazz,
3016 const JNINativeMethod *methods,
3017 jint nMethods))
3018 JNIWrapper("RegisterNatives");
3019 HOTSPOT_JNI_REGISTERNATIVES_ENTRY(env, clazz, (void *) methods, nMethods);
3020 jint ret = 0;
3021 DT_RETURN_MARK(RegisterNatives, jint, (const jint&)ret);
3022
3023 KlassHandle h_k(thread, java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz)));
3024
3025 for (int index = 0; index < nMethods; index++) {
3026 const char* meth_name = methods[index].name;
3027 const char* meth_sig = methods[index].signature;
3028 int meth_name_len = (int)strlen(meth_name);
3029
3030 // The class should have been loaded (we have an instance of the class
3031 // passed in) so the method and signature should already be in the symbol
3032 // table. If they're not there, the method doesn't exist.
3033 TempNewSymbol name = SymbolTable::probe(meth_name, meth_name_len);
3034 TempNewSymbol signature = SymbolTable::probe(meth_sig, (int)strlen(meth_sig));
3035
3036 if (name == NULL || signature == NULL) {
3037 ResourceMark rm;
3038 stringStream st;
3039 st.print("Method %s.%s%s not found", h_k()->external_name(), meth_name, meth_sig);
3040 // Must return negative value on failure
3041 THROW_MSG_(vmSymbols::java_lang_NoSuchMethodError(), st.as_string(), -1);
3042 }
3043
3044 bool res = register_native(h_k, name, signature,
3045 (address) methods[index].fnPtr, THREAD);
3046 if (!res) {
3047 ret = -1;
3048 break;
3049 }
3050 }
3051 return ret;
3052 JNI_END
3053
3054
3055 JNI_ENTRY(jint, jni_UnregisterNatives(JNIEnv *env, jclass clazz))
3056 JNIWrapper("UnregisterNatives");
3057 HOTSPOT_JNI_UNREGISTERNATIVES_ENTRY(env, clazz);
3058 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz));
3059 //%note jni_2
3060 if (k->is_instance_klass()) {
3061 for (int index = 0; index < InstanceKlass::cast(k)->methods()->length(); index++) {
3062 Method* m = InstanceKlass::cast(k)->methods()->at(index);
3063 if (m->is_native()) {
3064 m->clear_native_function();
3065 m->set_signature_handler(NULL);
3066 }
3067 }
3068 }
3069 HOTSPOT_JNI_UNREGISTERNATIVES_RETURN(0);
3070 return 0;
3071 JNI_END
3072
3073 //
3074 // Monitor functions
3075 //
3076
3077 DT_RETURN_MARK_DECL(MonitorEnter, jint
3078 , HOTSPOT_JNI_MONITORENTER_RETURN(_ret_ref));
3079
3080 JNI_ENTRY(jint, jni_MonitorEnter(JNIEnv *env, jobject jobj))
3081 HOTSPOT_JNI_MONITORENTER_ENTRY(env, jobj);
3082 jint ret = JNI_ERR;
3083 DT_RETURN_MARK(MonitorEnter, jint, (const jint&)ret);
3084
3085 // If the object is null, we can't do anything with it
3086 if (jobj == NULL) {
3087 THROW_(vmSymbols::java_lang_NullPointerException(), JNI_ERR);
3088 }
3089
3090 Handle obj(thread, JNIHandles::resolve_non_null(jobj));
3091 ObjectSynchronizer::jni_enter(obj, CHECK_(JNI_ERR));
3092 ret = JNI_OK;
3093 return ret;
3094 JNI_END
3095
3096 DT_RETURN_MARK_DECL(MonitorExit, jint
3097 , HOTSPOT_JNI_MONITOREXIT_RETURN(_ret_ref));
3098
3099 JNI_ENTRY(jint, jni_MonitorExit(JNIEnv *env, jobject jobj))
3100 HOTSPOT_JNI_MONITOREXIT_ENTRY(env, jobj);
3101 jint ret = JNI_ERR;
3102 DT_RETURN_MARK(MonitorExit, jint, (const jint&)ret);
3103
3104 // Don't do anything with a null object
3105 if (jobj == NULL) {
3106 THROW_(vmSymbols::java_lang_NullPointerException(), JNI_ERR);
3107 }
3108
3109 Handle obj(THREAD, JNIHandles::resolve_non_null(jobj));
3110 ObjectSynchronizer::jni_exit(obj(), CHECK_(JNI_ERR));
3111
3112 ret = JNI_OK;
3113 return ret;
3114 JNI_END
3115
3116 //
3117 // Extensions
3118 //
3119
3120 DT_VOID_RETURN_MARK_DECL(GetStringRegion
3121 , HOTSPOT_JNI_GETSTRINGREGION_RETURN());
3122
3123 JNI_ENTRY(void, jni_GetStringRegion(JNIEnv *env, jstring string, jsize start, jsize len, jchar *buf))
3124 JNIWrapper("GetStringRegion");
3125 HOTSPOT_JNI_GETSTRINGREGION_ENTRY(env, string, start, len, buf);
3126 DT_VOID_RETURN_MARK(GetStringRegion);
3127 oop s = JNIHandles::resolve_non_null(string);
3128 int s_len = java_lang_String::length(s);
3129 if (start < 0 || len < 0 || start + len > s_len) {
3130 THROW(vmSymbols::java_lang_StringIndexOutOfBoundsException());
3131 } else {
3132 if (len > 0) {
3133 typeArrayOop s_value = java_lang_String::value(s);
3134 bool is_latin1 = java_lang_String::is_latin1(s);
3135 if (!is_latin1) {
3136 memcpy(buf, s_value->char_at_addr(start), sizeof(jchar)*len);
3137 } else {
3138 for (int i = 0; i < len; i++) {
3139 buf[i] = ((jchar) s_value->byte_at(i + start)) & 0xff;
3140 }
3141 }
3142 }
3143 }
3144 JNI_END
3145
3146 DT_VOID_RETURN_MARK_DECL(GetStringUTFRegion
3147 , HOTSPOT_JNI_GETSTRINGUTFREGION_RETURN());
3148
3149 JNI_ENTRY(void, jni_GetStringUTFRegion(JNIEnv *env, jstring string, jsize start, jsize len, char *buf))
3150 JNIWrapper("GetStringUTFRegion");
3151 HOTSPOT_JNI_GETSTRINGUTFREGION_ENTRY(env, string, start, len, buf);
3152 DT_VOID_RETURN_MARK(GetStringUTFRegion);
3153 oop s = JNIHandles::resolve_non_null(string);
3154 int s_len = java_lang_String::length(s);
3155 if (start < 0 || len < 0 || start + len > s_len) {
3156 THROW(vmSymbols::java_lang_StringIndexOutOfBoundsException());
3157 } else {
3158 //%note jni_7
3159 if (len > 0) {
3160 // Assume the buffer is large enough as the JNI spec. does not require user error checking
3161 java_lang_String::as_utf8_string(s, start, len, buf, INT_MAX);
3162 // as_utf8_string null-terminates the result string
3163 } else {
3164 // JDK null-terminates the buffer even in len is zero
3165 if (buf != NULL) {
3166 buf[0] = 0;
3167 }
3168 }
3169 }
3170 JNI_END
3171
3172
3173 JNI_ENTRY(void*, jni_GetPrimitiveArrayCritical(JNIEnv *env, jarray array, jboolean *isCopy))
3174 JNIWrapper("GetPrimitiveArrayCritical");
3175 HOTSPOT_JNI_GETPRIMITIVEARRAYCRITICAL_ENTRY(env, array, (uintptr_t *) isCopy);
3176 GCLocker::lock_critical(thread);
3177 if (isCopy != NULL) {
3178 *isCopy = JNI_FALSE;
3179 }
3180 oop a = JNIHandles::resolve_non_null(array);
3181 assert(a->is_array(), "just checking");
3182 BasicType type;
3183 if (a->is_objArray()) {
3184 type = T_OBJECT;
3185 } else {
3186 type = TypeArrayKlass::cast(a->klass())->element_type();
3187 }
3188 void* ret = arrayOop(a)->base(type);
3189 HOTSPOT_JNI_GETPRIMITIVEARRAYCRITICAL_RETURN(ret);
3190 return ret;
3191 JNI_END
3192
3193
3194 JNI_ENTRY(void, jni_ReleasePrimitiveArrayCritical(JNIEnv *env, jarray array, void *carray, jint mode))
3195 JNIWrapper("ReleasePrimitiveArrayCritical");
3196 HOTSPOT_JNI_RELEASEPRIMITIVEARRAYCRITICAL_ENTRY(env, array, carray, mode);
3197 // The array, carray and mode arguments are ignored
3198 GCLocker::unlock_critical(thread);
3199 HOTSPOT_JNI_RELEASEPRIMITIVEARRAYCRITICAL_RETURN();
3200 JNI_END
3201
3202
3203 JNI_ENTRY(const jchar*, jni_GetStringCritical(JNIEnv *env, jstring string, jboolean *isCopy))
3204 JNIWrapper("GetStringCritical");
3205 HOTSPOT_JNI_GETSTRINGCRITICAL_ENTRY(env, string, (uintptr_t *) isCopy);
3206 GCLocker::lock_critical(thread);
3207 oop s = JNIHandles::resolve_non_null(string);
3208 typeArrayOop s_value = java_lang_String::value(s);
3209 bool is_latin1 = java_lang_String::is_latin1(s);
3210 if (isCopy != NULL) {
3211 *isCopy = is_latin1 ? JNI_TRUE : JNI_FALSE;
3212 }
3213 jchar* ret;
3214 if (!is_latin1) {
3215 ret = (jchar*) s_value->base(T_CHAR);
3216 } else {
3217 // Inflate latin1 encoded string to UTF16
3218 int s_len = java_lang_String::length(s);
3219 ret = NEW_C_HEAP_ARRAY_RETURN_NULL(jchar, s_len + 1, mtInternal); // add one for zero termination
3220 /* JNI Specification states return NULL on OOM */
3221 if (ret != NULL) {
3222 for (int i = 0; i < s_len; i++) {
3223 ret[i] = ((jchar) s_value->byte_at(i)) & 0xff;
3224 }
3225 ret[s_len] = 0;
3226 }
3227 }
3228 HOTSPOT_JNI_GETSTRINGCRITICAL_RETURN((uint16_t *) ret);
3229 return ret;
3230 JNI_END
3231
3232
3233 JNI_ENTRY(void, jni_ReleaseStringCritical(JNIEnv *env, jstring str, const jchar *chars))
3234 JNIWrapper("ReleaseStringCritical");
3235 HOTSPOT_JNI_RELEASESTRINGCRITICAL_ENTRY(env, str, (uint16_t *) chars);
3236 // The str and chars arguments are ignored for UTF16 strings
3237 oop s = JNIHandles::resolve_non_null(str);
3238 bool is_latin1 = java_lang_String::is_latin1(s);
3239 if (is_latin1) {
3240 // For latin1 string, free jchar array allocated by earlier call to GetStringCritical.
3241 // This assumes that ReleaseStringCritical bookends GetStringCritical.
3242 FREE_C_HEAP_ARRAY(jchar, chars);
3243 }
3244 GCLocker::unlock_critical(thread);
3245 HOTSPOT_JNI_RELEASESTRINGCRITICAL_RETURN();
3246 JNI_END
3247
3248
3249 JNI_ENTRY(jweak, jni_NewWeakGlobalRef(JNIEnv *env, jobject ref))
3250 JNIWrapper("jni_NewWeakGlobalRef");
3251 HOTSPOT_JNI_NEWWEAKGLOBALREF_ENTRY(env, ref);
3252 Handle ref_handle(thread, JNIHandles::resolve(ref));
3253 jweak ret = JNIHandles::make_weak_global(ref_handle);
3254 HOTSPOT_JNI_NEWWEAKGLOBALREF_RETURN(ret);
3255 return ret;
3256 JNI_END
3257
3258 // Must be JNI_ENTRY (with HandleMark)
3259 JNI_ENTRY(void, jni_DeleteWeakGlobalRef(JNIEnv *env, jweak ref))
3260 JNIWrapper("jni_DeleteWeakGlobalRef");
3261 HOTSPOT_JNI_DELETEWEAKGLOBALREF_ENTRY(env, ref);
3262 JNIHandles::destroy_weak_global(ref);
3263 HOTSPOT_JNI_DELETEWEAKGLOBALREF_RETURN();
3264 JNI_END
3265
3266
3267 JNI_QUICK_ENTRY(jboolean, jni_ExceptionCheck(JNIEnv *env))
3268 JNIWrapper("jni_ExceptionCheck");
3269 HOTSPOT_JNI_EXCEPTIONCHECK_ENTRY(env);
3270 jni_check_async_exceptions(thread);
3271 jboolean ret = (thread->has_pending_exception()) ? JNI_TRUE : JNI_FALSE;
3272 HOTSPOT_JNI_EXCEPTIONCHECK_RETURN(ret);
3273 return ret;
3274 JNI_END
3275
3276
3277 // Initialization state for three routines below relating to
3278 // java.nio.DirectBuffers
3279 static jint directBufferSupportInitializeStarted = 0;
3280 static volatile jint directBufferSupportInitializeEnded = 0;
3281 static volatile jint directBufferSupportInitializeFailed = 0;
3282 static jclass bufferClass = NULL;
3283 static jclass directBufferClass = NULL;
3284 static jclass directByteBufferClass = NULL;
3285 static jmethodID directByteBufferConstructor = NULL;
3286 static jfieldID directBufferAddressField = NULL;
3287 static jfieldID bufferCapacityField = NULL;
3288
3289 static jclass lookupOne(JNIEnv* env, const char* name, TRAPS) {
3290 Handle loader; // null (bootstrap) loader
3291 Handle protection_domain; // null protection domain
3292
3293 TempNewSymbol sym = SymbolTable::new_symbol(name, CHECK_NULL);
3294 jclass result = find_class_from_class_loader(env, sym, true, loader, protection_domain, true, CHECK_NULL);
3295
3296 if (log_is_enabled(Debug, class, resolve) && result != NULL) {
3297 trace_class_resolution(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(result)));
3298 }
3299 return result;
3300 }
3301
3302 // These lookups are done with the NULL (bootstrap) ClassLoader to
3303 // circumvent any security checks that would be done by jni_FindClass.
3304 JNI_ENTRY(bool, lookupDirectBufferClasses(JNIEnv* env))
3305 {
3306 if ((bufferClass = lookupOne(env, "java/nio/Buffer", thread)) == NULL) { return false; }
3307 if ((directBufferClass = lookupOne(env, "sun/nio/ch/DirectBuffer", thread)) == NULL) { return false; }
3308 if ((directByteBufferClass = lookupOne(env, "java/nio/DirectByteBuffer", thread)) == NULL) { return false; }
3309 return true;
3310 }
3311 JNI_END
3312
3313
3314 static bool initializeDirectBufferSupport(JNIEnv* env, JavaThread* thread) {
3315 if (directBufferSupportInitializeFailed) {
3316 return false;
3317 }
3318
3319 if (Atomic::cmpxchg(1, &directBufferSupportInitializeStarted, 0) == 0) {
3320 if (!lookupDirectBufferClasses(env)) {
3321 directBufferSupportInitializeFailed = 1;
3322 return false;
3323 }
3324
3325 // Make global references for these
3326 bufferClass = (jclass) env->NewGlobalRef(bufferClass);
3327 directBufferClass = (jclass) env->NewGlobalRef(directBufferClass);
3328 directByteBufferClass = (jclass) env->NewGlobalRef(directByteBufferClass);
3329
3330 // Get needed field and method IDs
3331 directByteBufferConstructor = env->GetMethodID(directByteBufferClass, "<init>", "(JI)V");
3332 if (env->ExceptionCheck()) {
3333 env->ExceptionClear();
3334 directBufferSupportInitializeFailed = 1;
3335 return false;
3336 }
3337 directBufferAddressField = env->GetFieldID(bufferClass, "address", "J");
3338 if (env->ExceptionCheck()) {
3339 env->ExceptionClear();
3340 directBufferSupportInitializeFailed = 1;
3341 return false;
3342 }
3343 bufferCapacityField = env->GetFieldID(bufferClass, "capacity", "I");
3344 if (env->ExceptionCheck()) {
3345 env->ExceptionClear();
3346 directBufferSupportInitializeFailed = 1;
3347 return false;
3348 }
3349
3350 if ((directByteBufferConstructor == NULL) ||
3351 (directBufferAddressField == NULL) ||
3352 (bufferCapacityField == NULL)) {
3353 directBufferSupportInitializeFailed = 1;
3354 return false;
3355 }
3356
3357 directBufferSupportInitializeEnded = 1;
3358 } else {
3359 while (!directBufferSupportInitializeEnded && !directBufferSupportInitializeFailed) {
3360 os::naked_yield();
3361 }
3362 }
3363
3364 return !directBufferSupportInitializeFailed;
3365 }
3366
3367 extern "C" jobject JNICALL jni_NewDirectByteBuffer(JNIEnv *env, void* address, jlong capacity)
3368 {
3369 // thread_from_jni_environment() will block if VM is gone.
3370 JavaThread* thread = JavaThread::thread_from_jni_environment(env);
3371
3372 JNIWrapper("jni_NewDirectByteBuffer");
3373 HOTSPOT_JNI_NEWDIRECTBYTEBUFFER_ENTRY(env, address, capacity);
3374
3375 if (!directBufferSupportInitializeEnded) {
3376 if (!initializeDirectBufferSupport(env, thread)) {
3377 HOTSPOT_JNI_NEWDIRECTBYTEBUFFER_RETURN(NULL);
3378 return NULL;
3379 }
3380 }
3381
3382 // Being paranoid about accidental sign extension on address
3383 jlong addr = (jlong) ((uintptr_t) address);
3384 // NOTE that package-private DirectByteBuffer constructor currently
3385 // takes int capacity
3386 jint cap = (jint) capacity;
3387 jobject ret = env->NewObject(directByteBufferClass, directByteBufferConstructor, addr, cap);
3388 HOTSPOT_JNI_NEWDIRECTBYTEBUFFER_RETURN(ret);
3389 return ret;
3390 }
3391
3392 DT_RETURN_MARK_DECL(GetDirectBufferAddress, void*
3393 , HOTSPOT_JNI_GETDIRECTBUFFERADDRESS_RETURN((void*) _ret_ref));
3394
3395 extern "C" void* JNICALL jni_GetDirectBufferAddress(JNIEnv *env, jobject buf)
3396 {
3397 // thread_from_jni_environment() will block if VM is gone.
3398 JavaThread* thread = JavaThread::thread_from_jni_environment(env);
3399
3400 JNIWrapper("jni_GetDirectBufferAddress");
3401 HOTSPOT_JNI_GETDIRECTBUFFERADDRESS_ENTRY(env, buf);
3402 void* ret = NULL;
3403 DT_RETURN_MARK(GetDirectBufferAddress, void*, (const void*&)ret);
3404
3405 if (!directBufferSupportInitializeEnded) {
3406 if (!initializeDirectBufferSupport(env, thread)) {
3407 return 0;
3408 }
3409 }
3410
3411 if ((buf != NULL) && (!env->IsInstanceOf(buf, directBufferClass))) {
3412 return 0;
3413 }
3414
3415 ret = (void*)(intptr_t)env->GetLongField(buf, directBufferAddressField);
3416 return ret;
3417 }
3418
3419 DT_RETURN_MARK_DECL(GetDirectBufferCapacity, jlong
3420 , HOTSPOT_JNI_GETDIRECTBUFFERCAPACITY_RETURN(_ret_ref));
3421
3422 extern "C" jlong JNICALL jni_GetDirectBufferCapacity(JNIEnv *env, jobject buf)
3423 {
3424 // thread_from_jni_environment() will block if VM is gone.
3425 JavaThread* thread = JavaThread::thread_from_jni_environment(env);
3426
3427 JNIWrapper("jni_GetDirectBufferCapacity");
3428 HOTSPOT_JNI_GETDIRECTBUFFERCAPACITY_ENTRY(env, buf);
3429 jlong ret = -1;
3430 DT_RETURN_MARK(GetDirectBufferCapacity, jlong, (const jlong&)ret);
3431
3432 if (!directBufferSupportInitializeEnded) {
3433 if (!initializeDirectBufferSupport(env, thread)) {
3434 ret = 0;
3435 return ret;
3436 }
3437 }
3438
3439 if (buf == NULL) {
3440 return -1;
3441 }
3442
3443 if (!env->IsInstanceOf(buf, directBufferClass)) {
3444 return -1;
3445 }
3446
3447 // NOTE that capacity is currently an int in the implementation
3448 ret = env->GetIntField(buf, bufferCapacityField);
3449 return ret;
3450 }
3451
3452
3453 JNI_LEAF(jint, jni_GetVersion(JNIEnv *env))
3454 JNIWrapper("GetVersion");
3455 HOTSPOT_JNI_GETVERSION_ENTRY(env);
3456 HOTSPOT_JNI_GETVERSION_RETURN(CurrentVersion);
3457 return CurrentVersion;
3458 JNI_END
3459
3460 extern struct JavaVM_ main_vm;
3461
3462 JNI_LEAF(jint, jni_GetJavaVM(JNIEnv *env, JavaVM **vm))
3463 JNIWrapper("jni_GetJavaVM");
3464 HOTSPOT_JNI_GETJAVAVM_ENTRY(env, (void **) vm);
3465 *vm = (JavaVM *)(&main_vm);
3466 HOTSPOT_JNI_GETJAVAVM_RETURN(JNI_OK);
3467 return JNI_OK;
3468 JNI_END
3469
3470
3471 JNI_ENTRY(jobject, jni_GetModule(JNIEnv* env, jclass clazz))
3472 JNIWrapper("GetModule");
3473 return Modules::get_module(clazz, THREAD);
3474 JNI_END
3475
3476
3477 // Structure containing all jni functions
3478 struct JNINativeInterface_ jni_NativeInterface = {
3479 NULL,
3480 NULL,
3481 NULL,
3482
3483 NULL,
3484
3485 jni_GetVersion,
3486
3487 jni_DefineClass,
3488 jni_FindClass,
3489
3490 jni_FromReflectedMethod,
3491 jni_FromReflectedField,
3492
3493 jni_ToReflectedMethod,
3494
3495 jni_GetSuperclass,
3496 jni_IsAssignableFrom,
3497
3498 jni_ToReflectedField,
3499
3500 jni_Throw,
3501 jni_ThrowNew,
3502 jni_ExceptionOccurred,
3503 jni_ExceptionDescribe,
3504 jni_ExceptionClear,
3505 jni_FatalError,
3506
3507 jni_PushLocalFrame,
3508 jni_PopLocalFrame,
3509
3510 jni_NewGlobalRef,
3511 jni_DeleteGlobalRef,
3512 jni_DeleteLocalRef,
3513 jni_IsSameObject,
3514
3515 jni_NewLocalRef,
3516 jni_EnsureLocalCapacity,
3517
3518 jni_AllocObject,
3519 jni_NewObject,
3520 jni_NewObjectV,
3521 jni_NewObjectA,
3522
3523 jni_GetObjectClass,
3524 jni_IsInstanceOf,
3525
3526 jni_GetMethodID,
3527
3528 jni_CallObjectMethod,
3529 jni_CallObjectMethodV,
3530 jni_CallObjectMethodA,
3531 jni_CallBooleanMethod,
3532 jni_CallBooleanMethodV,
3533 jni_CallBooleanMethodA,
3534 jni_CallByteMethod,
3535 jni_CallByteMethodV,
3536 jni_CallByteMethodA,
3537 jni_CallCharMethod,
3538 jni_CallCharMethodV,
3539 jni_CallCharMethodA,
3540 jni_CallShortMethod,
3541 jni_CallShortMethodV,
3542 jni_CallShortMethodA,
3543 jni_CallIntMethod,
3544 jni_CallIntMethodV,
3545 jni_CallIntMethodA,
3546 jni_CallLongMethod,
3547 jni_CallLongMethodV,
3548 jni_CallLongMethodA,
3549 jni_CallFloatMethod,
3550 jni_CallFloatMethodV,
3551 jni_CallFloatMethodA,
3552 jni_CallDoubleMethod,
3553 jni_CallDoubleMethodV,
3554 jni_CallDoubleMethodA,
3555 jni_CallVoidMethod,
3556 jni_CallVoidMethodV,
3557 jni_CallVoidMethodA,
3558
3559 jni_CallNonvirtualObjectMethod,
3560 jni_CallNonvirtualObjectMethodV,
3561 jni_CallNonvirtualObjectMethodA,
3562 jni_CallNonvirtualBooleanMethod,
3563 jni_CallNonvirtualBooleanMethodV,
3564 jni_CallNonvirtualBooleanMethodA,
3565 jni_CallNonvirtualByteMethod,
3566 jni_CallNonvirtualByteMethodV,
3567 jni_CallNonvirtualByteMethodA,
3568 jni_CallNonvirtualCharMethod,
3569 jni_CallNonvirtualCharMethodV,
3570 jni_CallNonvirtualCharMethodA,
3571 jni_CallNonvirtualShortMethod,
3572 jni_CallNonvirtualShortMethodV,
3573 jni_CallNonvirtualShortMethodA,
3574 jni_CallNonvirtualIntMethod,
3575 jni_CallNonvirtualIntMethodV,
3576 jni_CallNonvirtualIntMethodA,
3577 jni_CallNonvirtualLongMethod,
3578 jni_CallNonvirtualLongMethodV,
3579 jni_CallNonvirtualLongMethodA,
3580 jni_CallNonvirtualFloatMethod,
3581 jni_CallNonvirtualFloatMethodV,
3582 jni_CallNonvirtualFloatMethodA,
3583 jni_CallNonvirtualDoubleMethod,
3584 jni_CallNonvirtualDoubleMethodV,
3585 jni_CallNonvirtualDoubleMethodA,
3586 jni_CallNonvirtualVoidMethod,
3587 jni_CallNonvirtualVoidMethodV,
3588 jni_CallNonvirtualVoidMethodA,
3589
3590 jni_GetFieldID,
3591
3592 jni_GetObjectField,
3593 jni_GetBooleanField,
3594 jni_GetByteField,
3595 jni_GetCharField,
3596 jni_GetShortField,
3597 jni_GetIntField,
3598 jni_GetLongField,
3599 jni_GetFloatField,
3600 jni_GetDoubleField,
3601
3602 jni_SetObjectField,
3603 jni_SetBooleanField,
3604 jni_SetByteField,
3605 jni_SetCharField,
3606 jni_SetShortField,
3607 jni_SetIntField,
3608 jni_SetLongField,
3609 jni_SetFloatField,
3610 jni_SetDoubleField,
3611
3612 jni_GetStaticMethodID,
3613
3614 jni_CallStaticObjectMethod,
3615 jni_CallStaticObjectMethodV,
3616 jni_CallStaticObjectMethodA,
3617 jni_CallStaticBooleanMethod,
3618 jni_CallStaticBooleanMethodV,
3619 jni_CallStaticBooleanMethodA,
3620 jni_CallStaticByteMethod,
3621 jni_CallStaticByteMethodV,
3622 jni_CallStaticByteMethodA,
3623 jni_CallStaticCharMethod,
3624 jni_CallStaticCharMethodV,
3625 jni_CallStaticCharMethodA,
3626 jni_CallStaticShortMethod,
3627 jni_CallStaticShortMethodV,
3628 jni_CallStaticShortMethodA,
3629 jni_CallStaticIntMethod,
3630 jni_CallStaticIntMethodV,
3631 jni_CallStaticIntMethodA,
3632 jni_CallStaticLongMethod,
3633 jni_CallStaticLongMethodV,
3634 jni_CallStaticLongMethodA,
3635 jni_CallStaticFloatMethod,
3636 jni_CallStaticFloatMethodV,
3637 jni_CallStaticFloatMethodA,
3638 jni_CallStaticDoubleMethod,
3639 jni_CallStaticDoubleMethodV,
3640 jni_CallStaticDoubleMethodA,
3641 jni_CallStaticVoidMethod,
3642 jni_CallStaticVoidMethodV,
3643 jni_CallStaticVoidMethodA,
3644
3645 jni_GetStaticFieldID,
3646
3647 jni_GetStaticObjectField,
3648 jni_GetStaticBooleanField,
3649 jni_GetStaticByteField,
3650 jni_GetStaticCharField,
3651 jni_GetStaticShortField,
3652 jni_GetStaticIntField,
3653 jni_GetStaticLongField,
3654 jni_GetStaticFloatField,
3655 jni_GetStaticDoubleField,
3656
3657 jni_SetStaticObjectField,
3658 jni_SetStaticBooleanField,
3659 jni_SetStaticByteField,
3660 jni_SetStaticCharField,
3661 jni_SetStaticShortField,
3662 jni_SetStaticIntField,
3663 jni_SetStaticLongField,
3664 jni_SetStaticFloatField,
3665 jni_SetStaticDoubleField,
3666
3667 jni_NewString,
3668 jni_GetStringLength,
3669 jni_GetStringChars,
3670 jni_ReleaseStringChars,
3671
3672 jni_NewStringUTF,
3673 jni_GetStringUTFLength,
3674 jni_GetStringUTFChars,
3675 jni_ReleaseStringUTFChars,
3676
3677 jni_GetArrayLength,
3678
3679 jni_NewObjectArray,
3680 jni_GetObjectArrayElement,
3681 jni_SetObjectArrayElement,
3682
3683 jni_NewBooleanArray,
3684 jni_NewByteArray,
3685 jni_NewCharArray,
3686 jni_NewShortArray,
3687 jni_NewIntArray,
3688 jni_NewLongArray,
3689 jni_NewFloatArray,
3690 jni_NewDoubleArray,
3691
3692 jni_GetBooleanArrayElements,
3693 jni_GetByteArrayElements,
3694 jni_GetCharArrayElements,
3695 jni_GetShortArrayElements,
3696 jni_GetIntArrayElements,
3697 jni_GetLongArrayElements,
3698 jni_GetFloatArrayElements,
3699 jni_GetDoubleArrayElements,
3700
3701 jni_ReleaseBooleanArrayElements,
3702 jni_ReleaseByteArrayElements,
3703 jni_ReleaseCharArrayElements,
3704 jni_ReleaseShortArrayElements,
3705 jni_ReleaseIntArrayElements,
3706 jni_ReleaseLongArrayElements,
3707 jni_ReleaseFloatArrayElements,
3708 jni_ReleaseDoubleArrayElements,
3709
3710 jni_GetBooleanArrayRegion,
3711 jni_GetByteArrayRegion,
3712 jni_GetCharArrayRegion,
3713 jni_GetShortArrayRegion,
3714 jni_GetIntArrayRegion,
3715 jni_GetLongArrayRegion,
3716 jni_GetFloatArrayRegion,
3717 jni_GetDoubleArrayRegion,
3718
3719 jni_SetBooleanArrayRegion,
3720 jni_SetByteArrayRegion,
3721 jni_SetCharArrayRegion,
3722 jni_SetShortArrayRegion,
3723 jni_SetIntArrayRegion,
3724 jni_SetLongArrayRegion,
3725 jni_SetFloatArrayRegion,
3726 jni_SetDoubleArrayRegion,
3727
3728 jni_RegisterNatives,
3729 jni_UnregisterNatives,
3730
3731 jni_MonitorEnter,
3732 jni_MonitorExit,
3733
3734 jni_GetJavaVM,
3735
3736 jni_GetStringRegion,
3737 jni_GetStringUTFRegion,
3738
3739 jni_GetPrimitiveArrayCritical,
3740 jni_ReleasePrimitiveArrayCritical,
3741
3742 jni_GetStringCritical,
3743 jni_ReleaseStringCritical,
3744
3745 jni_NewWeakGlobalRef,
3746 jni_DeleteWeakGlobalRef,
3747
3748 jni_ExceptionCheck,
3749
3750 jni_NewDirectByteBuffer,
3751 jni_GetDirectBufferAddress,
3752 jni_GetDirectBufferCapacity,
3753
3754 // New 1_6 features
3755
3756 jni_GetObjectRefType,
3757
3758 // Module features
3759
3760 jni_GetModule
3761 };
3762
3763
3764 // For jvmti use to modify jni function table.
3765 // Java threads in native contiues to run until it is transitioned
3766 // to VM at safepoint. Before the transition or before it is blocked
3767 // for safepoint it may access jni function table. VM could crash if
3768 // any java thread access the jni function table in the middle of memcpy.
3769 // To avoid this each function pointers are copied automically.
3770 void copy_jni_function_table(const struct JNINativeInterface_ *new_jni_NativeInterface) {
3771 assert(SafepointSynchronize::is_at_safepoint(), "must be at safepoint");
3772 intptr_t *a = (intptr_t *) jni_functions();
3773 intptr_t *b = (intptr_t *) new_jni_NativeInterface;
3774 for (uint i=0; i < sizeof(struct JNINativeInterface_)/sizeof(void *); i++) {
3775 Atomic::store_ptr(*b++, a++);
3776 }
3777 }
3778
3779 void quicken_jni_functions() {
3780 // Replace Get<Primitive>Field with fast versions
3781 if (UseFastJNIAccessors && !JvmtiExport::can_post_field_access()
3782 && !VerifyJNIFields && !CountJNICalls && !CheckJNICalls
3783 #if defined(_WINDOWS) && defined(IA32) && defined(COMPILER2)
3784 // windows x86 currently needs SEH wrapper and the gain of the fast
3785 // versions currently isn't certain for server vm on uniprocessor.
3786 && os::is_MP()
3787 #endif
3788 ) {
3789 address func;
3790 func = JNI_FastGetField::generate_fast_get_boolean_field();
3791 if (func != (address)-1) {
3792 jni_NativeInterface.GetBooleanField = (GetBooleanField_t)func;
3793 }
3794 func = JNI_FastGetField::generate_fast_get_byte_field();
3795 if (func != (address)-1) {
3796 jni_NativeInterface.GetByteField = (GetByteField_t)func;
3797 }
3798 func = JNI_FastGetField::generate_fast_get_char_field();
3799 if (func != (address)-1) {
3800 jni_NativeInterface.GetCharField = (GetCharField_t)func;
3801 }
3802 func = JNI_FastGetField::generate_fast_get_short_field();
3803 if (func != (address)-1) {
3804 jni_NativeInterface.GetShortField = (GetShortField_t)func;
3805 }
3806 func = JNI_FastGetField::generate_fast_get_int_field();
3807 if (func != (address)-1) {
3808 jni_NativeInterface.GetIntField = (GetIntField_t)func;
3809 }
3810 func = JNI_FastGetField::generate_fast_get_long_field();
3811 if (func != (address)-1) {
3812 jni_NativeInterface.GetLongField = (GetLongField_t)func;
3813 }
3814 func = JNI_FastGetField::generate_fast_get_float_field();
3815 if (func != (address)-1) {
3816 jni_NativeInterface.GetFloatField = (GetFloatField_t)func;
3817 }
3818 func = JNI_FastGetField::generate_fast_get_double_field();
3819 if (func != (address)-1) {
3820 jni_NativeInterface.GetDoubleField = (GetDoubleField_t)func;
3821 }
3822 }
3823 }
3824
3825 // Returns the function structure
3826 struct JNINativeInterface_* jni_functions() {
3827 #if INCLUDE_JNI_CHECK
3828 if (CheckJNICalls) return jni_functions_check();
3829 #endif // INCLUDE_JNI_CHECK
3830 return &jni_NativeInterface;
3831 }
3832
3833 // Returns the function structure
3834 struct JNINativeInterface_* jni_functions_nocheck() {
3835 return &jni_NativeInterface;
3836 }
3837
3838
3839 // Invocation API
3840
3841
3842 // Forward declaration
3843 extern const struct JNIInvokeInterface_ jni_InvokeInterface;
3844
3845 // Global invocation API vars
3846 volatile jint vm_created = 0;
3847 // Indicate whether it is safe to recreate VM
3848 volatile jint safe_to_recreate_vm = 1;
3849 struct JavaVM_ main_vm = {&jni_InvokeInterface};
3850
3851
3852 #define JAVASTACKSIZE (400 * 1024) /* Default size of a thread java stack */
3853 enum { VERIFY_NONE, VERIFY_REMOTE, VERIFY_ALL };
3854
3855 DT_RETURN_MARK_DECL(GetDefaultJavaVMInitArgs, jint
3856 , HOTSPOT_JNI_GETDEFAULTJAVAVMINITARGS_RETURN(_ret_ref));
3857
3858 _JNI_IMPORT_OR_EXPORT_ jint JNICALL JNI_GetDefaultJavaVMInitArgs(void *args_) {
3859 HOTSPOT_JNI_GETDEFAULTJAVAVMINITARGS_ENTRY(args_);
3860 JDK1_1InitArgs *args = (JDK1_1InitArgs *)args_;
3861 jint ret = JNI_ERR;
3862 DT_RETURN_MARK(GetDefaultJavaVMInitArgs, jint, (const jint&)ret);
3863
3864 if (Threads::is_supported_jni_version(args->version)) {
3865 ret = JNI_OK;
3866 }
3867 // 1.1 style no longer supported in hotspot.
3868 // According the JNI spec, we should update args->version on return.
3869 // We also use the structure to communicate with launcher about default
3870 // stack size.
3871 if (args->version == JNI_VERSION_1_1) {
3872 args->version = JNI_VERSION_1_2;
3873 // javaStackSize is int in arguments structure
3874 assert(jlong(ThreadStackSize) * K < INT_MAX, "integer overflow");
3875 args->javaStackSize = (jint)(ThreadStackSize * K);
3876 }
3877 return ret;
3878 }
3879
3880 DT_RETURN_MARK_DECL(CreateJavaVM, jint
3881 , HOTSPOT_JNI_CREATEJAVAVM_RETURN(_ret_ref));
3882
3883 static jint JNI_CreateJavaVM_inner(JavaVM **vm, void **penv, void *args) {
3884 HOTSPOT_JNI_CREATEJAVAVM_ENTRY((void **) vm, penv, args);
3885
3886 jint result = JNI_ERR;
3887 DT_RETURN_MARK(CreateJavaVM, jint, (const jint&)result);
3888
3889 // We're about to use Atomic::xchg for synchronization. Some Zero
3890 // platforms use the GCC builtin __sync_lock_test_and_set for this,
3891 // but __sync_lock_test_and_set is not guaranteed to do what we want
3892 // on all architectures. So we check it works before relying on it.
3893 #if defined(ZERO) && defined(ASSERT)
3894 {
3895 jint a = 0xcafebabe;
3896 jint b = Atomic::xchg(0xdeadbeef, &a);
3897 void *c = &a;
3898 void *d = Atomic::xchg_ptr(&b, &c);
3899 assert(a == (jint) 0xdeadbeef && b == (jint) 0xcafebabe, "Atomic::xchg() works");
3900 assert(c == &b && d == &a, "Atomic::xchg_ptr() works");
3901 }
3902 #endif // ZERO && ASSERT
3903
3904 // At the moment it's only possible to have one Java VM,
3905 // since some of the runtime state is in global variables.
3906
3907 // We cannot use our mutex locks here, since they only work on
3908 // Threads. We do an atomic compare and exchange to ensure only
3909 // one thread can call this method at a time
3910
3911 // We use Atomic::xchg rather than Atomic::add/dec since on some platforms
3912 // the add/dec implementations are dependent on whether we are running
3913 // on a multiprocessor, and at this stage of initialization the os::is_MP
3914 // function used to determine this will always return false. Atomic::xchg
3915 // does not have this problem.
3916 if (Atomic::xchg(1, &vm_created) == 1) {
3917 return JNI_EEXIST; // already created, or create attempt in progress
3918 }
3919 if (Atomic::xchg(0, &safe_to_recreate_vm) == 0) {
3920 return JNI_ERR; // someone tried and failed and retry not allowed.
3921 }
3922
3923 assert(vm_created == 1, "vm_created is true during the creation");
3924
3925 /**
3926 * Certain errors during initialization are recoverable and do not
3927 * prevent this method from being called again at a later time
3928 * (perhaps with different arguments). However, at a certain
3929 * point during initialization if an error occurs we cannot allow
3930 * this function to be called again (or it will crash). In those
3931 * situations, the 'canTryAgain' flag is set to false, which atomically
3932 * sets safe_to_recreate_vm to 1, such that any new call to
3933 * JNI_CreateJavaVM will immediately fail using the above logic.
3934 */
3935 bool can_try_again = true;
3936
3937 result = Threads::create_vm((JavaVMInitArgs*) args, &can_try_again);
3938 if (result == JNI_OK) {
3939 JavaThread *thread = JavaThread::current();
3940 assert(!thread->has_pending_exception(), "should have returned not OK");
3941 /* thread is thread_in_vm here */
3942 *vm = (JavaVM *)(&main_vm);
3943 *(JNIEnv**)penv = thread->jni_environment();
3944
3945 #if INCLUDE_JVMCI
3946 if (EnableJVMCI) {
3947 if (UseJVMCICompiler) {
3948 // JVMCI is initialized on a CompilerThread
3949 if (BootstrapJVMCI) {
3950 JavaThread* THREAD = thread;
3951 JVMCICompiler* compiler = JVMCICompiler::instance(CATCH);
3952 compiler->bootstrap(THREAD);
3953 if (HAS_PENDING_EXCEPTION) {
3954 HandleMark hm;
3955 vm_exit_during_initialization(Handle(THREAD, PENDING_EXCEPTION));
3956 }
3957 }
3958 }
3959 }
3960 #endif
3961
3962 // Tracks the time application was running before GC
3963 RuntimeService::record_application_start();
3964
3965 // Notify JVMTI
3966 if (JvmtiExport::should_post_thread_life()) {
3967 JvmtiExport::post_thread_start(thread);
3968 }
3969
3970 EventThreadStart event;
3971 if (event.should_commit()) {
3972 event.set_thread(THREAD_TRACE_ID(thread));
3973 event.commit();
3974 }
3975
3976 #ifndef PRODUCT
3977 // Check if we should compile all classes on bootclasspath
3978 if (CompileTheWorld) ClassLoader::compile_the_world();
3979 if (ReplayCompiles) ciReplay::replay(thread);
3980
3981 // Some platforms (like Win*) need a wrapper around these test
3982 // functions in order to properly handle error conditions.
3983 test_error_handler();
3984 if (ExecuteInternalVMTests) {
3985 InternalVMTests::run();
3986 }
3987 #endif
3988
3989 // Since this is not a JVM_ENTRY we have to set the thread state manually before leaving.
3990 ThreadStateTransition::transition_and_fence(thread, _thread_in_vm, _thread_in_native);
3991 } else {
3992 // If create_vm exits because of a pending exception, exit with that
3993 // exception. In the future when we figure out how to reclaim memory,
3994 // we may be able to exit with JNI_ERR and allow the calling application
3995 // to continue.
3996 if (Universe::is_fully_initialized()) {
3997 // otherwise no pending exception possible - VM will already have aborted
3998 JavaThread* THREAD = JavaThread::current();
3999 if (HAS_PENDING_EXCEPTION) {
4000 HandleMark hm;
4001 vm_exit_during_initialization(Handle(THREAD, PENDING_EXCEPTION));
4002 }
4003 }
4004
4005 if (can_try_again) {
4006 // reset safe_to_recreate_vm to 1 so that retrial would be possible
4007 safe_to_recreate_vm = 1;
4008 }
4009
4010 // Creation failed. We must reset vm_created
4011 *vm = 0;
4012 *(JNIEnv**)penv = 0;
4013 // reset vm_created last to avoid race condition. Use OrderAccess to
4014 // control both compiler and architectural-based reordering.
4015 OrderAccess::release_store(&vm_created, 0);
4016 }
4017
4018 // Flush stdout and stderr before exit.
4019 fflush(stdout);
4020 fflush(stderr);
4021
4022 return result;
4023
4024 }
4025
4026 _JNI_IMPORT_OR_EXPORT_ jint JNICALL JNI_CreateJavaVM(JavaVM **vm, void **penv, void *args) {
4027 jint result = 0;
4028 // On Windows, let CreateJavaVM run with SEH protection
4029 #ifdef _WIN32
4030 __try {
4031 #endif
4032 result = JNI_CreateJavaVM_inner(vm, penv, args);
4033 #ifdef _WIN32
4034 } __except(topLevelExceptionFilter((_EXCEPTION_POINTERS*)_exception_info())) {
4035 // Nothing to do.
4036 }
4037 #endif
4038 return result;
4039 }
4040
4041 _JNI_IMPORT_OR_EXPORT_ jint JNICALL JNI_GetCreatedJavaVMs(JavaVM **vm_buf, jsize bufLen, jsize *numVMs) {
4042 // See bug 4367188, the wrapper can sometimes cause VM crashes
4043 // JNIWrapper("GetCreatedJavaVMs");
4044
4045 HOTSPOT_JNI_GETCREATEDJAVAVMS_ENTRY((void **) vm_buf, bufLen, (uintptr_t *) numVMs);
4046
4047 if (vm_created) {
4048 if (numVMs != NULL) *numVMs = 1;
4049 if (bufLen > 0) *vm_buf = (JavaVM *)(&main_vm);
4050 } else {
4051 if (numVMs != NULL) *numVMs = 0;
4052 }
4053 HOTSPOT_JNI_GETCREATEDJAVAVMS_RETURN(JNI_OK);
4054 return JNI_OK;
4055 }
4056
4057 extern "C" {
4058
4059 DT_RETURN_MARK_DECL(DestroyJavaVM, jint
4060 , HOTSPOT_JNI_DESTROYJAVAVM_RETURN(_ret_ref));
4061
4062 jint JNICALL jni_DestroyJavaVM(JavaVM *vm) {
4063 HOTSPOT_JNI_DESTROYJAVAVM_ENTRY(vm);
4064 jint res = JNI_ERR;
4065 DT_RETURN_MARK(DestroyJavaVM, jint, (const jint&)res);
4066
4067 if (!vm_created) {
4068 res = JNI_ERR;
4069 return res;
4070 }
4071
4072 JNIWrapper("DestroyJavaVM");
4073 JNIEnv *env;
4074 JavaVMAttachArgs destroyargs;
4075 destroyargs.version = CurrentVersion;
4076 destroyargs.name = (char *)"DestroyJavaVM";
4077 destroyargs.group = NULL;
4078 res = vm->AttachCurrentThread((void **)&env, (void *)&destroyargs);
4079 if (res != JNI_OK) {
4080 return res;
4081 }
4082
4083 // Since this is not a JVM_ENTRY we have to set the thread state manually before entering.
4084 JavaThread* thread = JavaThread::current();
4085 ThreadStateTransition::transition_from_native(thread, _thread_in_vm);
4086 if (Threads::destroy_vm()) {
4087 // Should not change thread state, VM is gone
4088 vm_created = false;
4089 res = JNI_OK;
4090 return res;
4091 } else {
4092 ThreadStateTransition::transition_and_fence(thread, _thread_in_vm, _thread_in_native);
4093 res = JNI_ERR;
4094 return res;
4095 }
4096 }
4097
4098
4099 static jint attach_current_thread(JavaVM *vm, void **penv, void *_args, bool daemon) {
4100 JavaVMAttachArgs *args = (JavaVMAttachArgs *) _args;
4101
4102 // Check below commented out from JDK1.2fcs as well
4103 /*
4104 if (args && (args->version != JNI_VERSION_1_1 || args->version != JNI_VERSION_1_2)) {
4105 return JNI_EVERSION;
4106 }
4107 */
4108
4109 Thread* t = Thread::current_or_null();
4110 if (t != NULL) {
4111 // If the thread has been attached this operation is a no-op
4112 *(JNIEnv**)penv = ((JavaThread*) t)->jni_environment();
4113 return JNI_OK;
4114 }
4115
4116 // Create a thread and mark it as attaching so it will be skipped by the
4117 // ThreadsListEnumerator - see CR 6404306
4118 JavaThread* thread = new JavaThread(true);
4119
4120 // Set correct safepoint info. The thread is going to call into Java when
4121 // initializing the Java level thread object. Hence, the correct state must
4122 // be set in order for the Safepoint code to deal with it correctly.
4123 thread->set_thread_state(_thread_in_vm);
4124 thread->record_stack_base_and_size();
4125 thread->initialize_thread_current();
4126
4127 if (!os::create_attached_thread(thread)) {
4128 delete thread;
4129 return JNI_ERR;
4130 }
4131 // Enable stack overflow checks
4132 thread->create_stack_guard_pages();
4133
4134 thread->initialize_tlab();
4135
4136 thread->cache_global_variables();
4137
4138 // Crucial that we do not have a safepoint check for this thread, since it has
4139 // not been added to the Thread list yet.
4140 { Threads_lock->lock_without_safepoint_check();
4141 // This must be inside this lock in order to get FullGCALot to work properly, i.e., to
4142 // avoid this thread trying to do a GC before it is added to the thread-list
4143 thread->set_active_handles(JNIHandleBlock::allocate_block());
4144 Threads::add(thread, daemon);
4145 Threads_lock->unlock();
4146 }
4147 // Create thread group and name info from attach arguments
4148 oop group = NULL;
4149 char* thread_name = NULL;
4150 if (args != NULL && Threads::is_supported_jni_version(args->version)) {
4151 group = JNIHandles::resolve(args->group);
4152 thread_name = args->name; // may be NULL
4153 }
4154 if (group == NULL) group = Universe::main_thread_group();
4155
4156 // Create Java level thread object and attach it to this thread
4157 bool attach_failed = false;
4158 {
4159 EXCEPTION_MARK;
4160 HandleMark hm(THREAD);
4161 Handle thread_group(THREAD, group);
4162 thread->allocate_threadObj(thread_group, thread_name, daemon, THREAD);
4163 if (HAS_PENDING_EXCEPTION) {
4164 CLEAR_PENDING_EXCEPTION;
4165 // cleanup outside the handle mark.
4166 attach_failed = true;
4167 }
4168 }
4169
4170 if (attach_failed) {
4171 // Added missing cleanup
4172 thread->cleanup_failed_attach_current_thread();
4173 return JNI_ERR;
4174 }
4175
4176 // mark the thread as no longer attaching
4177 // this uses a fence to push the change through so we don't have
4178 // to regrab the threads_lock
4179 thread->set_done_attaching_via_jni();
4180
4181 // Set java thread status.
4182 java_lang_Thread::set_thread_status(thread->threadObj(),
4183 java_lang_Thread::RUNNABLE);
4184
4185 // Notify the debugger
4186 if (JvmtiExport::should_post_thread_life()) {
4187 JvmtiExport::post_thread_start(thread);
4188 }
4189
4190 EventThreadStart event;
4191 if (event.should_commit()) {
4192 event.set_thread(THREAD_TRACE_ID(thread));
4193 event.commit();
4194 }
4195
4196 *(JNIEnv**)penv = thread->jni_environment();
4197
4198 // Now leaving the VM, so change thread_state. This is normally automatically taken care
4199 // of in the JVM_ENTRY. But in this situation we have to do it manually. Notice, that by
4200 // using ThreadStateTransition::transition, we do a callback to the safepoint code if
4201 // needed.
4202
4203 ThreadStateTransition::transition_and_fence(thread, _thread_in_vm, _thread_in_native);
4204
4205 // Perform any platform dependent FPU setup
4206 os::setup_fpu();
4207
4208 return JNI_OK;
4209 }
4210
4211
4212 jint JNICALL jni_AttachCurrentThread(JavaVM *vm, void **penv, void *_args) {
4213 HOTSPOT_JNI_ATTACHCURRENTTHREAD_ENTRY(vm, penv, _args);
4214 if (!vm_created) {
4215 HOTSPOT_JNI_ATTACHCURRENTTHREAD_RETURN((uint32_t) JNI_ERR);
4216 return JNI_ERR;
4217 }
4218
4219 JNIWrapper("AttachCurrentThread");
4220 jint ret = attach_current_thread(vm, penv, _args, false);
4221 HOTSPOT_JNI_ATTACHCURRENTTHREAD_RETURN(ret);
4222 return ret;
4223 }
4224
4225
4226 jint JNICALL jni_DetachCurrentThread(JavaVM *vm) {
4227 HOTSPOT_JNI_DETACHCURRENTTHREAD_ENTRY(vm);
4228 VM_Exit::block_if_vm_exited();
4229
4230 JNIWrapper("DetachCurrentThread");
4231
4232 // If the thread has already been detached the operation is a no-op
4233 if (Thread::current_or_null() == NULL) {
4234 HOTSPOT_JNI_DETACHCURRENTTHREAD_RETURN(JNI_OK);
4235 return JNI_OK;
4236 }
4237
4238 JavaThread* thread = JavaThread::current();
4239 if (thread->has_last_Java_frame()) {
4240 HOTSPOT_JNI_DETACHCURRENTTHREAD_RETURN((uint32_t) JNI_ERR);
4241 // Can't detach a thread that's running java, that can't work.
4242 return JNI_ERR;
4243 }
4244
4245 // Safepoint support. Have to do call-back to safepoint code, if in the
4246 // middel of a safepoint operation
4247 ThreadStateTransition::transition_from_native(thread, _thread_in_vm);
4248
4249 // XXX: Note that JavaThread::exit() call below removes the guards on the
4250 // stack pages set up via enable_stack_{red,yellow}_zone() calls
4251 // above in jni_AttachCurrentThread. Unfortunately, while the setting
4252 // of the guards is visible in jni_AttachCurrentThread above,
4253 // the removal of the guards is buried below in JavaThread::exit()
4254 // here. The abstraction should be more symmetrically either exposed
4255 // or hidden (e.g. it could probably be hidden in the same
4256 // (platform-dependent) methods where we do alternate stack
4257 // maintenance work?)
4258 thread->exit(false, JavaThread::jni_detach);
4259 delete thread;
4260
4261 HOTSPOT_JNI_DETACHCURRENTTHREAD_RETURN(JNI_OK);
4262 return JNI_OK;
4263 }
4264
4265 DT_RETURN_MARK_DECL(GetEnv, jint
4266 , HOTSPOT_JNI_GETENV_RETURN(_ret_ref));
4267
4268 jint JNICALL jni_GetEnv(JavaVM *vm, void **penv, jint version) {
4269 HOTSPOT_JNI_GETENV_ENTRY(vm, penv, version);
4270 jint ret = JNI_ERR;
4271 DT_RETURN_MARK(GetEnv, jint, (const jint&)ret);
4272
4273 if (!vm_created) {
4274 *penv = NULL;
4275 ret = JNI_EDETACHED;
4276 return ret;
4277 }
4278
4279 if (JniExportedInterface::GetExportedInterface(vm, penv, version, &ret)) {
4280 return ret;
4281 }
4282
4283 #ifndef JVMPI_VERSION_1
4284 // need these in order to be polite about older agents
4285 #define JVMPI_VERSION_1 ((jint)0x10000001)
4286 #define JVMPI_VERSION_1_1 ((jint)0x10000002)
4287 #define JVMPI_VERSION_1_2 ((jint)0x10000003)
4288 #endif // !JVMPI_VERSION_1
4289
4290 Thread* thread = Thread::current_or_null();
4291 if (thread != NULL && thread->is_Java_thread()) {
4292 if (Threads::is_supported_jni_version_including_1_1(version)) {
4293 *(JNIEnv**)penv = ((JavaThread*) thread)->jni_environment();
4294 ret = JNI_OK;
4295 return ret;
4296
4297 } else if (version == JVMPI_VERSION_1 ||
4298 version == JVMPI_VERSION_1_1 ||
4299 version == JVMPI_VERSION_1_2) {
4300 tty->print_cr("ERROR: JVMPI, an experimental interface, is no longer supported.");
4301 tty->print_cr("Please use the supported interface: the JVM Tool Interface (JVM TI).");
4302 ret = JNI_EVERSION;
4303 return ret;
4304 } else if (JvmtiExport::is_jvmdi_version(version)) {
4305 tty->print_cr("FATAL ERROR: JVMDI is no longer supported.");
4306 tty->print_cr("Please use the supported interface: the JVM Tool Interface (JVM TI).");
4307 ret = JNI_EVERSION;
4308 return ret;
4309 } else {
4310 *penv = NULL;
4311 ret = JNI_EVERSION;
4312 return ret;
4313 }
4314 } else {
4315 *penv = NULL;
4316 ret = JNI_EDETACHED;
4317 return ret;
4318 }
4319 }
4320
4321
4322 jint JNICALL jni_AttachCurrentThreadAsDaemon(JavaVM *vm, void **penv, void *_args) {
4323 HOTSPOT_JNI_ATTACHCURRENTTHREADASDAEMON_ENTRY(vm, penv, _args);
4324 if (!vm_created) {
4325 HOTSPOT_JNI_ATTACHCURRENTTHREADASDAEMON_RETURN((uint32_t) JNI_ERR);
4326 return JNI_ERR;
4327 }
4328
4329 JNIWrapper("AttachCurrentThreadAsDaemon");
4330 jint ret = attach_current_thread(vm, penv, _args, true);
4331 HOTSPOT_JNI_ATTACHCURRENTTHREADASDAEMON_RETURN(ret);
4332 return ret;
4333 }
4334
4335
4336 } // End extern "C"
4337
4338 const struct JNIInvokeInterface_ jni_InvokeInterface = {
4339 NULL,
4340 NULL,
4341 NULL,
4342
4343 jni_DestroyJavaVM,
4344 jni_AttachCurrentThread,
4345 jni_DetachCurrentThread,
4346 jni_GetEnv,
4347 jni_AttachCurrentThreadAsDaemon
4348 };